Merge ../scsi-rc-fixes-2.6
Conflicts:
include/scsi/scsi_devinfo.h
Same number for two BLIST flags: BLIST_MAX_512 and BLIST_ATTACH_PQ3
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile
index 81803a1..3ce80ab 100644
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -33,7 +33,7 @@
obj-$(CONFIG_SCSI_ISCSI_ATTRS) += scsi_transport_iscsi.o
obj-$(CONFIG_SCSI_SAS_ATTRS) += scsi_transport_sas.o
-obj-$(CONFIG_ISCSI_TCP) += iscsi_tcp.o
+obj-$(CONFIG_ISCSI_TCP) += libiscsi.o iscsi_tcp.o
obj-$(CONFIG_SCSI_AMIGA7XX) += amiga7xx.o 53c7xx.o
obj-$(CONFIG_A3000_SCSI) += a3000.o wd33c93.o
obj-$(CONFIG_A2091_SCSI) += a2091.o wd33c93.o
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index 2068b66..fe00a3f 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -3,7 +3,8 @@
*
* Copyright (C) 2004 Dmitry Yusupov
* Copyright (C) 2004 Alex Aizman
- * Copyright (C) 2005 Mike Christie
+ * Copyright (C) 2005 - 2006 Mike Christie
+ * Copyright (C) 2006 Red Hat, Inc. All rights reserved.
* maintained by open-iscsi@googlegroups.com
*
* This program is free software; you can redistribute it and/or modify
@@ -36,10 +37,6 @@
#include <linux/mutex.h>
#include <net/tcp.h>
#include <scsi/scsi_cmnd.h>
-#include <scsi/scsi_device.h>
-#include <scsi/scsi_eh.h>
-#include <scsi/scsi_request.h>
-#include <scsi/scsi_tcq.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi.h>
#include <scsi/scsi_transport_iscsi.h>
@@ -52,21 +49,14 @@
MODULE_LICENSE("GPL");
MODULE_VERSION("0:4.445");
/* #define DEBUG_TCP */
-/* #define DEBUG_SCSI */
#define DEBUG_ASSERT
#ifdef DEBUG_TCP
-#define debug_tcp(fmt...) printk(KERN_DEBUG "tcp: " fmt)
+#define debug_tcp(fmt...) printk(KERN_INFO "tcp: " fmt)
#else
#define debug_tcp(fmt...)
#endif
-#ifdef DEBUG_SCSI
-#define debug_scsi(fmt...) printk(KERN_DEBUG "scsi: " fmt)
-#else
-#define debug_scsi(fmt...)
-#endif
-
#ifndef DEBUG_ASSERT
#ifdef BUG_ON
#undef BUG_ON
@@ -74,8 +64,6 @@
#define BUG_ON(expr)
#endif
-#define INVALID_SN_DELTA 0xffff
-
static unsigned int iscsi_max_lun = 512;
module_param_named(max_lun, iscsi_max_lun, uint, S_IRUGO);
@@ -130,68 +118,39 @@
iscsi_hdr_digest(struct iscsi_conn *conn, struct iscsi_buf *buf,
u8* crc)
{
- crypto_digest_digest(conn->tx_tfm, &buf->sg, 1, crc);
+ struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
+
+ crypto_digest_digest(tcp_conn->tx_tfm, &buf->sg, 1, crc);
buf->sg.length += sizeof(uint32_t);
}
-static void
-iscsi_conn_failure(struct iscsi_conn *conn, enum iscsi_err err)
-{
- struct iscsi_session *session = conn->session;
- unsigned long flags;
-
- spin_lock_irqsave(&session->lock, flags);
- if (session->conn_cnt == 1 || session->leadconn == conn)
- session->state = ISCSI_STATE_FAILED;
- spin_unlock_irqrestore(&session->lock, flags);
- set_bit(SUSPEND_BIT, &conn->suspend_tx);
- set_bit(SUSPEND_BIT, &conn->suspend_rx);
- iscsi_conn_error(conn->cls_conn, err);
-}
-
static inline int
-iscsi_check_assign_cmdsn(struct iscsi_session *session, struct iscsi_nopin *hdr)
+iscsi_hdr_extract(struct iscsi_tcp_conn *tcp_conn)
{
- uint32_t max_cmdsn = be32_to_cpu(hdr->max_cmdsn);
- uint32_t exp_cmdsn = be32_to_cpu(hdr->exp_cmdsn);
+ struct sk_buff *skb = tcp_conn->in.skb;
- if (max_cmdsn < exp_cmdsn -1 &&
- max_cmdsn > exp_cmdsn - INVALID_SN_DELTA)
- return ISCSI_ERR_MAX_CMDSN;
- if (max_cmdsn > session->max_cmdsn ||
- max_cmdsn < session->max_cmdsn - INVALID_SN_DELTA)
- session->max_cmdsn = max_cmdsn;
- if (exp_cmdsn > session->exp_cmdsn ||
- exp_cmdsn < session->exp_cmdsn - INVALID_SN_DELTA)
- session->exp_cmdsn = exp_cmdsn;
+ tcp_conn->in.zero_copy_hdr = 0;
- return 0;
-}
-
-static inline int
-iscsi_hdr_extract(struct iscsi_conn *conn)
-{
- struct sk_buff *skb = conn->in.skb;
-
- if (conn->in.copy >= conn->hdr_size &&
- conn->in_progress == IN_PROGRESS_WAIT_HEADER) {
+ if (tcp_conn->in.copy >= tcp_conn->hdr_size &&
+ tcp_conn->in_progress == IN_PROGRESS_WAIT_HEADER) {
/*
* Zero-copy PDU Header: using connection context
* to store header pointer.
*/
if (skb_shinfo(skb)->frag_list == NULL &&
- !skb_shinfo(skb)->nr_frags)
- conn->in.hdr = (struct iscsi_hdr *)
- ((char*)skb->data + conn->in.offset);
- else {
+ !skb_shinfo(skb)->nr_frags) {
+ tcp_conn->in.hdr = (struct iscsi_hdr *)
+ ((char*)skb->data + tcp_conn->in.offset);
+ tcp_conn->in.zero_copy_hdr = 1;
+ } else {
/* ignoring return code since we checked
* in.copy before */
- skb_copy_bits(skb, conn->in.offset,
- &conn->hdr, conn->hdr_size);
- conn->in.hdr = &conn->hdr;
+ skb_copy_bits(skb, tcp_conn->in.offset,
+ &tcp_conn->hdr, tcp_conn->hdr_size);
+ tcp_conn->in.hdr = &tcp_conn->hdr;
}
- conn->in.offset += conn->hdr_size;
- conn->in.copy -= conn->hdr_size;
+ tcp_conn->in.offset += tcp_conn->hdr_size;
+ tcp_conn->in.copy -= tcp_conn->hdr_size;
} else {
int hdr_remains;
int copylen;
@@ -201,118 +160,61 @@
* copying it... This'll happen quite rarely.
*/
- if (conn->in_progress == IN_PROGRESS_WAIT_HEADER)
- conn->in.hdr_offset = 0;
+ if (tcp_conn->in_progress == IN_PROGRESS_WAIT_HEADER)
+ tcp_conn->in.hdr_offset = 0;
- hdr_remains = conn->hdr_size - conn->in.hdr_offset;
+ hdr_remains = tcp_conn->hdr_size - tcp_conn->in.hdr_offset;
BUG_ON(hdr_remains <= 0);
- copylen = min(conn->in.copy, hdr_remains);
- skb_copy_bits(skb, conn->in.offset,
- (char*)&conn->hdr + conn->in.hdr_offset, copylen);
+ copylen = min(tcp_conn->in.copy, hdr_remains);
+ skb_copy_bits(skb, tcp_conn->in.offset,
+ (char*)&tcp_conn->hdr + tcp_conn->in.hdr_offset,
+ copylen);
debug_tcp("PDU gather offset %d bytes %d in.offset %d "
- "in.copy %d\n", conn->in.hdr_offset, copylen,
- conn->in.offset, conn->in.copy);
+ "in.copy %d\n", tcp_conn->in.hdr_offset, copylen,
+ tcp_conn->in.offset, tcp_conn->in.copy);
- conn->in.offset += copylen;
- conn->in.copy -= copylen;
+ tcp_conn->in.offset += copylen;
+ tcp_conn->in.copy -= copylen;
if (copylen < hdr_remains) {
- conn->in_progress = IN_PROGRESS_HEADER_GATHER;
- conn->in.hdr_offset += copylen;
+ tcp_conn->in_progress = IN_PROGRESS_HEADER_GATHER;
+ tcp_conn->in.hdr_offset += copylen;
return -EAGAIN;
}
- conn->in.hdr = &conn->hdr;
- conn->discontiguous_hdr_cnt++;
- conn->in_progress = IN_PROGRESS_WAIT_HEADER;
+ tcp_conn->in.hdr = &tcp_conn->hdr;
+ tcp_conn->discontiguous_hdr_cnt++;
+ tcp_conn->in_progress = IN_PROGRESS_WAIT_HEADER;
}
return 0;
}
-static inline void
-iscsi_ctask_cleanup(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
+/*
+ * must be called with session lock
+ */
+static void
+__iscsi_ctask_cleanup(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
{
- struct scsi_cmnd *sc = ctask->sc;
- struct iscsi_session *session = conn->session;
+ struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
+ struct scsi_cmnd *sc;
- spin_lock(&session->lock);
- if (unlikely(!sc)) {
- spin_unlock(&session->lock);
+ sc = ctask->sc;
+ if (unlikely(!sc))
return;
- }
+
if (sc->sc_data_direction == DMA_TO_DEVICE) {
struct iscsi_data_task *dtask, *n;
+
/* WRITE: cleanup Data-Out's if any */
- list_for_each_entry_safe(dtask, n, &ctask->dataqueue, item) {
+ list_for_each_entry_safe(dtask, n, &tcp_ctask->dataqueue,
+ item) {
list_del(&dtask->item);
- mempool_free(dtask, ctask->datapool);
+ mempool_free(dtask, tcp_ctask->datapool);
}
}
- ctask->xmstate = XMSTATE_IDLE;
- ctask->r2t = NULL;
- ctask->sc = NULL;
- __kfifo_put(session->cmdpool.queue, (void*)&ctask, sizeof(void*));
- spin_unlock(&session->lock);
-}
-
-/**
- * iscsi_cmd_rsp - SCSI Command Response processing
- * @conn: iscsi connection
- * @ctask: scsi command task
- **/
-static int
-iscsi_cmd_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
-{
- int rc;
- struct iscsi_cmd_rsp *rhdr = (struct iscsi_cmd_rsp *)conn->in.hdr;
- struct iscsi_session *session = conn->session;
- struct scsi_cmnd *sc = ctask->sc;
-
- rc = iscsi_check_assign_cmdsn(session, (struct iscsi_nopin*)rhdr);
- if (rc) {
- sc->result = (DID_ERROR << 16);
- goto out;
- }
-
- conn->exp_statsn = be32_to_cpu(rhdr->statsn) + 1;
-
- sc->result = (DID_OK << 16) | rhdr->cmd_status;
-
- if (rhdr->response != ISCSI_STATUS_CMD_COMPLETED) {
- sc->result = (DID_ERROR << 16);
- goto out;
- }
-
- if (rhdr->cmd_status == SAM_STAT_CHECK_CONDITION && conn->senselen) {
- int sensecopy = min(conn->senselen, SCSI_SENSE_BUFFERSIZE);
-
- memcpy(sc->sense_buffer, conn->data + 2, sensecopy);
- debug_scsi("copied %d bytes of sense\n", sensecopy);
- }
-
- if (sc->sc_data_direction == DMA_TO_DEVICE)
- goto out;
-
- if (rhdr->flags & ISCSI_FLAG_CMD_UNDERFLOW) {
- int res_count = be32_to_cpu(rhdr->residual_count);
-
- if (res_count > 0 && res_count <= sc->request_bufflen)
- sc->resid = res_count;
- else
- sc->result = (DID_BAD_TARGET << 16) | rhdr->cmd_status;
- } else if (rhdr->flags & ISCSI_FLAG_CMD_BIDI_UNDERFLOW)
- sc->result = (DID_BAD_TARGET << 16) | rhdr->cmd_status;
- else if (rhdr->flags & ISCSI_FLAG_CMD_OVERFLOW)
- sc->resid = be32_to_cpu(rhdr->residual_count);
-
-out:
- debug_scsi("done [sc %lx res %d itt 0x%x]\n",
- (long)sc, sc->result, ctask->itt);
- conn->scsirsp_pdus_cnt++;
- iscsi_ctask_cleanup(conn, ctask);
- sc->scsi_done(sc);
- return rc;
+ tcp_ctask->xmstate = XMSTATE_IDLE;
+ tcp_ctask->r2t = NULL;
}
/**
@@ -324,7 +226,9 @@
iscsi_data_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
{
int rc;
- struct iscsi_data_rsp *rhdr = (struct iscsi_data_rsp *)conn->in.hdr;
+ struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
+ struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
+ struct iscsi_data_rsp *rhdr = (struct iscsi_data_rsp *)tcp_conn->in.hdr;
struct iscsi_session *session = conn->session;
int datasn = be32_to_cpu(rhdr->datasn);
@@ -334,9 +238,9 @@
/*
* setup Data-In byte counter (gets decremented..)
*/
- ctask->data_count = conn->in.datalen;
+ ctask->data_count = tcp_conn->in.datalen;
- if (conn->in.datalen == 0)
+ if (tcp_conn->in.datalen == 0)
return 0;
if (ctask->datasn != datasn)
@@ -344,8 +248,8 @@
ctask->datasn++;
- ctask->data_offset = be32_to_cpu(rhdr->offset);
- if (ctask->data_offset + conn->in.datalen > ctask->total_length)
+ tcp_ctask->data_offset = be32_to_cpu(rhdr->offset);
+ if (tcp_ctask->data_offset + tcp_conn->in.datalen > ctask->total_length)
return ISCSI_ERR_DATA_OFFSET;
if (rhdr->flags & ISCSI_FLAG_DATA_STATUS) {
@@ -392,17 +296,19 @@
struct iscsi_data *hdr;
struct iscsi_data_task *dtask;
struct scsi_cmnd *sc = ctask->sc;
+ struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
- dtask = mempool_alloc(ctask->datapool, GFP_ATOMIC);
+ dtask = mempool_alloc(tcp_ctask->datapool, GFP_ATOMIC);
BUG_ON(!dtask);
+ INIT_LIST_HEAD(&dtask->item);
hdr = &dtask->hdr;
memset(hdr, 0, sizeof(struct iscsi_data));
hdr->ttt = r2t->ttt;
hdr->datasn = cpu_to_be32(r2t->solicit_datasn);
r2t->solicit_datasn++;
hdr->opcode = ISCSI_OP_SCSI_DATA_OUT;
- memcpy(hdr->lun, ctask->hdr.lun, sizeof(hdr->lun));
- hdr->itt = ctask->hdr.itt;
+ memcpy(hdr->lun, ctask->hdr->lun, sizeof(hdr->lun));
+ hdr->itt = ctask->hdr->itt;
hdr->exp_statsn = r2t->exp_statsn;
hdr->offset = cpu_to_be32(r2t->data_offset);
if (r2t->data_length > conn->max_xmit_dlength) {
@@ -451,11 +357,11 @@
}
BUG_ON(r2t->sg == NULL);
} else
- iscsi_buf_init_iov(&ctask->sendbuf,
+ iscsi_buf_init_iov(&tcp_ctask->sendbuf,
(char*)sc->request_buffer + r2t->data_offset,
r2t->data_count);
- list_add(&dtask->item, &ctask->dataqueue);
+ list_add(&dtask->item, &tcp_ctask->dataqueue);
}
/**
@@ -468,17 +374,16 @@
{
struct iscsi_r2t_info *r2t;
struct iscsi_session *session = conn->session;
- struct iscsi_r2t_rsp *rhdr = (struct iscsi_r2t_rsp *)conn->in.hdr;
+ struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
+ struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
+ struct iscsi_r2t_rsp *rhdr = (struct iscsi_r2t_rsp *)tcp_conn->in.hdr;
int r2tsn = be32_to_cpu(rhdr->r2tsn);
int rc;
- if (conn->in.ahslen)
- return ISCSI_ERR_AHSLEN;
-
- if (conn->in.datalen)
+ if (tcp_conn->in.datalen)
return ISCSI_ERR_DATALEN;
- if (ctask->exp_r2tsn && ctask->exp_r2tsn != r2tsn)
+ if (tcp_ctask->exp_r2tsn && tcp_ctask->exp_r2tsn != r2tsn)
return ISCSI_ERR_R2TSN;
rc = iscsi_check_assign_cmdsn(session, (struct iscsi_nopin*)rhdr);
@@ -496,7 +401,7 @@
spin_unlock(&session->lock);
return 0;
}
- rc = __kfifo_get(ctask->r2tpool.queue, (void*)&r2t, sizeof(void*));
+ rc = __kfifo_get(tcp_ctask->r2tpool.queue, (void*)&r2t, sizeof(void*));
BUG_ON(!rc);
r2t->exp_statsn = rhdr->statsn;
@@ -518,10 +423,10 @@
iscsi_solicit_data_init(conn, ctask, r2t);
- ctask->exp_r2tsn = r2tsn + 1;
- ctask->xmstate |= XMSTATE_SOL_HDR;
- __kfifo_put(ctask->r2tqueue, (void*)&r2t, sizeof(void*));
- __kfifo_put(conn->writequeue, (void*)&ctask, sizeof(void*));
+ tcp_ctask->exp_r2tsn = r2tsn + 1;
+ tcp_ctask->xmstate |= XMSTATE_SOL_HDR;
+ __kfifo_put(tcp_ctask->r2tqueue, (void*)&r2t, sizeof(void*));
+ __kfifo_put(conn->xmitqueue, (void*)&ctask, sizeof(void*));
scsi_queue_work(session->host, &conn->xmitwork);
conn->r2t_pdus_cnt++;
@@ -531,258 +436,136 @@
}
static int
-iscsi_hdr_recv(struct iscsi_conn *conn)
+iscsi_tcp_hdr_recv(struct iscsi_conn *conn)
{
- int rc = 0;
+ int rc = 0, opcode, ahslen;
struct iscsi_hdr *hdr;
- struct iscsi_cmd_task *ctask;
struct iscsi_session *session = conn->session;
- uint32_t cdgst, rdgst = 0;
+ struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
+ uint32_t cdgst, rdgst = 0, itt;
- hdr = conn->in.hdr;
+ hdr = tcp_conn->in.hdr;
/* verify PDU length */
- conn->in.datalen = ntoh24(hdr->dlength);
- if (conn->in.datalen > conn->max_recv_dlength) {
+ tcp_conn->in.datalen = ntoh24(hdr->dlength);
+ if (tcp_conn->in.datalen > conn->max_recv_dlength) {
printk(KERN_ERR "iscsi_tcp: datalen %d > %d\n",
- conn->in.datalen, conn->max_recv_dlength);
+ tcp_conn->in.datalen, conn->max_recv_dlength);
return ISCSI_ERR_DATALEN;
}
- conn->data_copied = 0;
+ tcp_conn->data_copied = 0;
/* read AHS */
- conn->in.ahslen = hdr->hlength * 4;
- conn->in.offset += conn->in.ahslen;
- conn->in.copy -= conn->in.ahslen;
- if (conn->in.copy < 0) {
+ ahslen = hdr->hlength << 2;
+ tcp_conn->in.offset += ahslen;
+ tcp_conn->in.copy -= ahslen;
+ if (tcp_conn->in.copy < 0) {
printk(KERN_ERR "iscsi_tcp: can't handle AHS with length "
- "%d bytes\n", conn->in.ahslen);
+ "%d bytes\n", ahslen);
return ISCSI_ERR_AHSLEN;
}
/* calculate read padding */
- conn->in.padding = conn->in.datalen & (ISCSI_PAD_LEN-1);
- if (conn->in.padding) {
- conn->in.padding = ISCSI_PAD_LEN - conn->in.padding;
- debug_scsi("read padding %d bytes\n", conn->in.padding);
+ tcp_conn->in.padding = tcp_conn->in.datalen & (ISCSI_PAD_LEN-1);
+ if (tcp_conn->in.padding) {
+ tcp_conn->in.padding = ISCSI_PAD_LEN - tcp_conn->in.padding;
+ debug_scsi("read padding %d bytes\n", tcp_conn->in.padding);
}
if (conn->hdrdgst_en) {
struct scatterlist sg;
sg_init_one(&sg, (u8 *)hdr,
- sizeof(struct iscsi_hdr) + conn->in.ahslen);
- crypto_digest_digest(conn->rx_tfm, &sg, 1, (u8 *)&cdgst);
+ sizeof(struct iscsi_hdr) + ahslen);
+ crypto_digest_digest(tcp_conn->rx_tfm, &sg, 1, (u8 *)&cdgst);
rdgst = *(uint32_t*)((char*)hdr + sizeof(struct iscsi_hdr) +
- conn->in.ahslen);
+ ahslen);
if (cdgst != rdgst) {
- printk(KERN_ERR "iscsi_tcp: itt %x: hdrdgst error "
- "recv 0x%x calc 0x%x\n", conn->in.itt, rdgst,
- cdgst);
+ printk(KERN_ERR "iscsi_tcp: hdrdgst error "
+ "recv 0x%x calc 0x%x\n", rdgst, cdgst);
return ISCSI_ERR_HDR_DGST;
}
}
- /* save opcode for later */
- conn->in.opcode = hdr->opcode & ISCSI_OPCODE_MASK;
-
+ opcode = hdr->opcode & ISCSI_OPCODE_MASK;
/* verify itt (itt encoding: age+cid+itt) */
- if (hdr->itt != cpu_to_be32(ISCSI_RESERVED_TAG)) {
- if ((hdr->itt & AGE_MASK) !=
- (session->age << AGE_SHIFT)) {
- printk(KERN_ERR "iscsi_tcp: received itt %x expected "
- "session age (%x)\n", hdr->itt,
- session->age & AGE_MASK);
- return ISCSI_ERR_BAD_ITT;
- }
-
- if ((hdr->itt & CID_MASK) != (conn->id << CID_SHIFT)) {
- printk(KERN_ERR "iscsi_tcp: received itt %x, expected "
- "CID (%x)\n", hdr->itt, conn->id);
- return ISCSI_ERR_BAD_ITT;
- }
- conn->in.itt = hdr->itt & ITT_MASK;
- } else
- conn->in.itt = hdr->itt;
+ rc = iscsi_verify_itt(conn, hdr, &itt);
+ if (rc == ISCSI_ERR_NO_SCSI_CMD) {
+ tcp_conn->in.datalen = 0; /* force drop */
+ return 0;
+ } else if (rc)
+ return rc;
debug_tcp("opcode 0x%x offset %d copy %d ahslen %d datalen %d\n",
- hdr->opcode, conn->in.offset, conn->in.copy,
- conn->in.ahslen, conn->in.datalen);
+ opcode, tcp_conn->in.offset, tcp_conn->in.copy,
+ ahslen, tcp_conn->in.datalen);
- if (conn->in.itt < session->cmds_max) {
- ctask = (struct iscsi_cmd_task *)session->cmds[conn->in.itt];
+ switch(opcode) {
+ case ISCSI_OP_SCSI_DATA_IN:
+ tcp_conn->in.ctask = session->cmds[itt];
+ rc = iscsi_data_rsp(conn, tcp_conn->in.ctask);
+ /* fall through */
+ case ISCSI_OP_SCSI_CMD_RSP:
+ tcp_conn->in.ctask = session->cmds[itt];
+ if (tcp_conn->in.datalen)
+ goto copy_hdr;
- if (!ctask->sc) {
- printk(KERN_INFO "iscsi_tcp: dropping ctask with "
- "itt 0x%x\n", ctask->itt);
- conn->in.datalen = 0; /* force drop */
- return 0;
- }
-
- if (ctask->sc->SCp.phase != session->age) {
- printk(KERN_ERR "iscsi_tcp: ctask's session age %d, "
- "expected %d\n", ctask->sc->SCp.phase,
- session->age);
- return ISCSI_ERR_SESSION_FAILED;
- }
-
- conn->in.ctask = ctask;
-
- debug_scsi("rsp [op 0x%x cid %d sc %lx itt 0x%x len %d]\n",
- hdr->opcode, conn->id, (long)ctask->sc,
- ctask->itt, conn->in.datalen);
-
- switch(conn->in.opcode) {
- case ISCSI_OP_SCSI_CMD_RSP:
- BUG_ON((void*)ctask != ctask->sc->SCp.ptr);
- if (!conn->in.datalen)
- rc = iscsi_cmd_rsp(conn, ctask);
- else
- /*
- * got sense or response data; copying PDU
- * Header to the connection's header
- * placeholder
- */
- memcpy(&conn->hdr, hdr,
- sizeof(struct iscsi_hdr));
- break;
- case ISCSI_OP_SCSI_DATA_IN:
- BUG_ON((void*)ctask != ctask->sc->SCp.ptr);
- /* save flags for non-exceptional status */
- conn->in.flags = hdr->flags;
- /* save cmd_status for sense data */
- conn->in.cmd_status =
- ((struct iscsi_data_rsp*)hdr)->cmd_status;
- rc = iscsi_data_rsp(conn, ctask);
- break;
- case ISCSI_OP_R2T:
- BUG_ON((void*)ctask != ctask->sc->SCp.ptr);
- if (ctask->sc->sc_data_direction == DMA_TO_DEVICE)
- rc = iscsi_r2t_rsp(conn, ctask);
- else
- rc = ISCSI_ERR_PROTO;
- break;
- default:
- rc = ISCSI_ERR_BAD_OPCODE;
- break;
- }
- } else if (conn->in.itt >= ISCSI_MGMT_ITT_OFFSET &&
- conn->in.itt < ISCSI_MGMT_ITT_OFFSET +
- session->mgmtpool_max) {
- struct iscsi_mgmt_task *mtask = (struct iscsi_mgmt_task *)
- session->mgmt_cmds[conn->in.itt -
- ISCSI_MGMT_ITT_OFFSET];
-
- debug_scsi("immrsp [op 0x%x cid %d itt 0x%x len %d]\n",
- conn->in.opcode, conn->id, mtask->itt,
- conn->in.datalen);
-
- switch(conn->in.opcode) {
- case ISCSI_OP_LOGIN_RSP:
- case ISCSI_OP_TEXT_RSP:
- case ISCSI_OP_LOGOUT_RSP:
- rc = iscsi_check_assign_cmdsn(session,
- (struct iscsi_nopin*)hdr);
- if (rc)
- break;
-
- if (!conn->in.datalen) {
- rc = iscsi_recv_pdu(conn->cls_conn, hdr,
- NULL, 0);
- if (conn->login_mtask != mtask) {
- spin_lock(&session->lock);
- __kfifo_put(session->mgmtpool.queue,
- (void*)&mtask, sizeof(void*));
- spin_unlock(&session->lock);
- }
- }
- break;
- case ISCSI_OP_SCSI_TMFUNC_RSP:
- rc = iscsi_check_assign_cmdsn(session,
- (struct iscsi_nopin*)hdr);
- if (rc)
- break;
-
- if (conn->in.datalen || conn->in.ahslen) {
- rc = ISCSI_ERR_PROTO;
- break;
- }
- conn->tmfrsp_pdus_cnt++;
- spin_lock(&session->lock);
- if (conn->tmabort_state == TMABORT_INITIAL) {
- __kfifo_put(session->mgmtpool.queue,
- (void*)&mtask, sizeof(void*));
- conn->tmabort_state =
- ((struct iscsi_tm_rsp *)hdr)->
- response == ISCSI_TMF_RSP_COMPLETE ?
- TMABORT_SUCCESS:TMABORT_FAILED;
- /* unblock eh_abort() */
- wake_up(&conn->ehwait);
- }
- spin_unlock(&session->lock);
- break;
- case ISCSI_OP_NOOP_IN:
- if (hdr->ttt != ISCSI_RESERVED_TAG) {
- rc = ISCSI_ERR_PROTO;
- break;
- }
- rc = iscsi_check_assign_cmdsn(session,
- (struct iscsi_nopin*)hdr);
- if (rc)
- break;
- conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1;
-
- if (!conn->in.datalen) {
- struct iscsi_mgmt_task *mtask;
-
- rc = iscsi_recv_pdu(conn->cls_conn, hdr,
- NULL, 0);
- mtask = (struct iscsi_mgmt_task *)
- session->mgmt_cmds[conn->in.itt -
- ISCSI_MGMT_ITT_OFFSET];
- if (conn->login_mtask != mtask) {
- spin_lock(&session->lock);
- __kfifo_put(session->mgmtpool.queue,
- (void*)&mtask, sizeof(void*));
- spin_unlock(&session->lock);
- }
- }
- break;
- default:
- rc = ISCSI_ERR_BAD_OPCODE;
- break;
- }
- } else if (conn->in.itt == ISCSI_RESERVED_TAG) {
- switch(conn->in.opcode) {
- case ISCSI_OP_NOOP_IN:
- if (!conn->in.datalen) {
- rc = iscsi_check_assign_cmdsn(session,
- (struct iscsi_nopin*)hdr);
- if (!rc && hdr->ttt != ISCSI_RESERVED_TAG)
- rc = iscsi_recv_pdu(conn->cls_conn,
- hdr, NULL, 0);
- } else
- rc = ISCSI_ERR_PROTO;
- break;
- case ISCSI_OP_REJECT:
- /* we need sth like iscsi_reject_rsp()*/
- case ISCSI_OP_ASYNC_EVENT:
- /* we need sth like iscsi_async_event_rsp() */
- rc = ISCSI_ERR_BAD_OPCODE;
- break;
- default:
- rc = ISCSI_ERR_BAD_OPCODE;
- break;
- }
- } else
- rc = ISCSI_ERR_BAD_ITT;
+ spin_lock(&session->lock);
+ __iscsi_ctask_cleanup(conn, tcp_conn->in.ctask);
+ rc = __iscsi_complete_pdu(conn, hdr, NULL, 0);
+ spin_unlock(&session->lock);
+ break;
+ case ISCSI_OP_R2T:
+ tcp_conn->in.ctask = session->cmds[itt];
+ if (ahslen)
+ rc = ISCSI_ERR_AHSLEN;
+ else if (tcp_conn->in.ctask->sc->sc_data_direction ==
+ DMA_TO_DEVICE)
+ rc = iscsi_r2t_rsp(conn, tcp_conn->in.ctask);
+ else
+ rc = ISCSI_ERR_PROTO;
+ break;
+ case ISCSI_OP_LOGIN_RSP:
+ case ISCSI_OP_TEXT_RSP:
+ case ISCSI_OP_LOGOUT_RSP:
+ case ISCSI_OP_NOOP_IN:
+ case ISCSI_OP_REJECT:
+ case ISCSI_OP_ASYNC_EVENT:
+ if (tcp_conn->in.datalen)
+ goto copy_hdr;
+ /* fall through */
+ case ISCSI_OP_SCSI_TMFUNC_RSP:
+ rc = iscsi_complete_pdu(conn, hdr, NULL, 0);
+ break;
+ default:
+ rc = ISCSI_ERR_BAD_OPCODE;
+ break;
+ }
return rc;
+
+copy_hdr:
+ /*
+ * if we did zero copy for the header but we will need multiple
+ * skbs to complete the command then we have to copy the header
+ * for later use
+ */
+ if (tcp_conn->in.zero_copy_hdr && tcp_conn->in.copy <
+ (tcp_conn->in.datalen + tcp_conn->in.padding +
+ (conn->datadgst_en ? 4 : 0))) {
+ debug_tcp("Copying header for later use. in.copy %d in.datalen"
+ " %d\n", tcp_conn->in.copy, tcp_conn->in.datalen);
+ memcpy(&tcp_conn->hdr, tcp_conn->in.hdr,
+ sizeof(struct iscsi_hdr));
+ tcp_conn->in.hdr = &tcp_conn->hdr;
+ tcp_conn->in.zero_copy_hdr = 0;
+ }
+ return 0;
}
/**
* iscsi_ctask_copy - copy skb bits to the destanation cmd task
- * @conn: iscsi connection
+ * @conn: iscsi tcp connection
* @ctask: scsi command task
* @buf: buffer to copy to
* @buf_size: size of buffer
@@ -804,110 +587,113 @@
* buf_left left to copy from in progress buffer
**/
static inline int
-iscsi_ctask_copy(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask,
+iscsi_ctask_copy(struct iscsi_tcp_conn *tcp_conn, struct iscsi_cmd_task *ctask,
void *buf, int buf_size, int offset)
{
- int buf_left = buf_size - (conn->data_copied + offset);
- int size = min(conn->in.copy, buf_left);
+ struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
+ int buf_left = buf_size - (tcp_conn->data_copied + offset);
+ int size = min(tcp_conn->in.copy, buf_left);
int rc;
size = min(size, ctask->data_count);
debug_tcp("ctask_copy %d bytes at offset %d copied %d\n",
- size, conn->in.offset, conn->in.copied);
+ size, tcp_conn->in.offset, tcp_conn->in.copied);
BUG_ON(size <= 0);
- BUG_ON(ctask->sent + size > ctask->total_length);
+ BUG_ON(tcp_ctask->sent + size > ctask->total_length);
- rc = skb_copy_bits(conn->in.skb, conn->in.offset,
- (char*)buf + (offset + conn->data_copied), size);
+ rc = skb_copy_bits(tcp_conn->in.skb, tcp_conn->in.offset,
+ (char*)buf + (offset + tcp_conn->data_copied), size);
/* must fit into skb->len */
BUG_ON(rc);
- conn->in.offset += size;
- conn->in.copy -= size;
- conn->in.copied += size;
- conn->data_copied += size;
- ctask->sent += size;
+ tcp_conn->in.offset += size;
+ tcp_conn->in.copy -= size;
+ tcp_conn->in.copied += size;
+ tcp_conn->data_copied += size;
+ tcp_ctask->sent += size;
ctask->data_count -= size;
- BUG_ON(conn->in.copy < 0);
+ BUG_ON(tcp_conn->in.copy < 0);
BUG_ON(ctask->data_count < 0);
- if (buf_size != (conn->data_copied + offset)) {
+ if (buf_size != (tcp_conn->data_copied + offset)) {
if (!ctask->data_count) {
- BUG_ON(buf_size - conn->data_copied < 0);
+ BUG_ON(buf_size - tcp_conn->data_copied < 0);
/* done with this PDU */
- return buf_size - conn->data_copied;
+ return buf_size - tcp_conn->data_copied;
}
return -EAGAIN;
}
/* done with this buffer or with both - PDU and buffer */
- conn->data_copied = 0;
+ tcp_conn->data_copied = 0;
return 0;
}
/**
* iscsi_tcp_copy - copy skb bits to the destanation buffer
- * @conn: iscsi connection
- * @buf: buffer to copy to
- * @buf_size: number of bytes to copy
+ * @conn: iscsi tcp connection
*
* Notes:
* The function calls skb_copy_bits() and updates per-connection
* byte counters.
**/
static inline int
-iscsi_tcp_copy(struct iscsi_conn *conn, void *buf, int buf_size)
+iscsi_tcp_copy(struct iscsi_tcp_conn *tcp_conn)
{
- int buf_left = buf_size - conn->data_copied;
- int size = min(conn->in.copy, buf_left);
+ void *buf = tcp_conn->data;
+ int buf_size = tcp_conn->in.datalen;
+ int buf_left = buf_size - tcp_conn->data_copied;
+ int size = min(tcp_conn->in.copy, buf_left);
int rc;
debug_tcp("tcp_copy %d bytes at offset %d copied %d\n",
- size, conn->in.offset, conn->data_copied);
+ size, tcp_conn->in.offset, tcp_conn->data_copied);
BUG_ON(size <= 0);
- rc = skb_copy_bits(conn->in.skb, conn->in.offset,
- (char*)buf + conn->data_copied, size);
+ rc = skb_copy_bits(tcp_conn->in.skb, tcp_conn->in.offset,
+ (char*)buf + tcp_conn->data_copied, size);
BUG_ON(rc);
- conn->in.offset += size;
- conn->in.copy -= size;
- conn->in.copied += size;
- conn->data_copied += size;
+ tcp_conn->in.offset += size;
+ tcp_conn->in.copy -= size;
+ tcp_conn->in.copied += size;
+ tcp_conn->data_copied += size;
- if (buf_size != conn->data_copied)
+ if (buf_size != tcp_conn->data_copied)
return -EAGAIN;
return 0;
}
static inline void
-partial_sg_digest_update(struct iscsi_conn *conn, struct scatterlist *sg,
- int offset, int length)
+partial_sg_digest_update(struct iscsi_tcp_conn *tcp_conn,
+ struct scatterlist *sg, int offset, int length)
{
struct scatterlist temp;
memcpy(&temp, sg, sizeof(struct scatterlist));
temp.offset = offset;
temp.length = length;
- crypto_digest_update(conn->data_rx_tfm, &temp, 1);
+ crypto_digest_update(tcp_conn->data_rx_tfm, &temp, 1);
}
static void
-iscsi_recv_digest_update(struct iscsi_conn *conn, char* buf, int len)
+iscsi_recv_digest_update(struct iscsi_tcp_conn *tcp_conn, char* buf, int len)
{
struct scatterlist tmp;
sg_init_one(&tmp, buf, len);
- crypto_digest_update(conn->data_rx_tfm, &tmp, 1);
+ crypto_digest_update(tcp_conn->data_rx_tfm, &tmp, 1);
}
static int iscsi_scsi_data_in(struct iscsi_conn *conn)
{
- struct iscsi_cmd_task *ctask = conn->in.ctask;
+ struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
+ struct iscsi_cmd_task *ctask = tcp_conn->in.ctask;
+ struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
struct scsi_cmnd *sc = ctask->sc;
struct scatterlist *sg;
int i, offset, rc = 0;
@@ -919,31 +705,33 @@
*/
if (!sc->use_sg) {
i = ctask->data_count;
- rc = iscsi_ctask_copy(conn, ctask, sc->request_buffer,
- sc->request_bufflen, ctask->data_offset);
+ rc = iscsi_ctask_copy(tcp_conn, ctask, sc->request_buffer,
+ sc->request_bufflen,
+ tcp_ctask->data_offset);
if (rc == -EAGAIN)
return rc;
if (conn->datadgst_en)
- iscsi_recv_digest_update(conn, sc->request_buffer, i);
+ iscsi_recv_digest_update(tcp_conn, sc->request_buffer,
+ i);
rc = 0;
goto done;
}
- offset = ctask->data_offset;
+ offset = tcp_ctask->data_offset;
sg = sc->request_buffer;
- if (ctask->data_offset)
- for (i = 0; i < ctask->sg_count; i++)
+ if (tcp_ctask->data_offset)
+ for (i = 0; i < tcp_ctask->sg_count; i++)
offset -= sg[i].length;
/* we've passed through partial sg*/
if (offset < 0)
offset = 0;
- for (i = ctask->sg_count; i < sc->use_sg; i++) {
+ for (i = tcp_ctask->sg_count; i < sc->use_sg; i++) {
char *dest;
dest = kmap_atomic(sg[i].page, KM_SOFTIRQ0);
- rc = iscsi_ctask_copy(conn, ctask, dest + sg[i].offset,
+ rc = iscsi_ctask_copy(tcp_conn, ctask, dest + sg[i].offset,
sg[i].length, offset);
kunmap_atomic(dest, KM_SOFTIRQ0);
if (rc == -EAGAIN)
@@ -952,15 +740,17 @@
if (!rc) {
if (conn->datadgst_en) {
if (!offset)
- crypto_digest_update(conn->data_rx_tfm,
- &sg[i], 1);
+ crypto_digest_update(
+ tcp_conn->data_rx_tfm,
+ &sg[i], 1);
else
- partial_sg_digest_update(conn, &sg[i],
+ partial_sg_digest_update(tcp_conn,
+ &sg[i],
sg[i].offset + offset,
sg[i].length - offset);
}
offset = 0;
- ctask->sg_count++;
+ tcp_ctask->sg_count++;
}
if (!ctask->data_count) {
@@ -968,25 +758,26 @@
/*
* data-in is complete, but buffer not...
*/
- partial_sg_digest_update(conn, &sg[i],
+ partial_sg_digest_update(tcp_conn, &sg[i],
sg[i].offset, sg[i].length-rc);
rc = 0;
break;
}
- if (!conn->in.copy)
+ if (!tcp_conn->in.copy)
return -EAGAIN;
}
BUG_ON(ctask->data_count);
done:
/* check for non-exceptional status */
- if (conn->in.flags & ISCSI_FLAG_DATA_STATUS) {
+ if (tcp_conn->in.hdr->flags & ISCSI_FLAG_DATA_STATUS) {
debug_scsi("done [sc %lx res %d itt 0x%x]\n",
(long)sc, sc->result, ctask->itt);
- conn->scsirsp_pdus_cnt++;
- iscsi_ctask_cleanup(conn, ctask);
- sc->scsi_done(sc);
+ spin_lock(&conn->session->lock);
+ __iscsi_ctask_cleanup(conn, ctask);
+ __iscsi_complete_pdu(conn, tcp_conn->in.hdr, NULL, 0);
+ spin_unlock(&conn->session->lock);
}
return rc;
@@ -995,71 +786,38 @@
static int
iscsi_data_recv(struct iscsi_conn *conn)
{
- struct iscsi_session *session = conn->session;
- int rc = 0;
+ struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
+ int rc = 0, opcode;
- switch(conn->in.opcode) {
+ opcode = tcp_conn->in.hdr->opcode & ISCSI_OPCODE_MASK;
+ switch (opcode) {
case ISCSI_OP_SCSI_DATA_IN:
rc = iscsi_scsi_data_in(conn);
break;
- case ISCSI_OP_SCSI_CMD_RSP: {
- /*
- * SCSI Sense Data:
- * copying the entire Data Segment.
- */
- if (iscsi_tcp_copy(conn, conn->data, conn->in.datalen)) {
- rc = -EAGAIN;
- goto exit;
- }
-
- /*
- * check for sense
- */
- conn->in.hdr = &conn->hdr;
- conn->senselen = (conn->data[0] << 8) | conn->data[1];
- rc = iscsi_cmd_rsp(conn, conn->in.ctask);
- if (!rc && conn->datadgst_en)
- iscsi_recv_digest_update(conn, conn->data,
- conn->in.datalen);
- }
- break;
+ case ISCSI_OP_SCSI_CMD_RSP:
+ spin_lock(&conn->session->lock);
+ __iscsi_ctask_cleanup(conn, tcp_conn->in.ctask);
+ spin_unlock(&conn->session->lock);
case ISCSI_OP_TEXT_RSP:
case ISCSI_OP_LOGIN_RSP:
- case ISCSI_OP_NOOP_IN: {
- struct iscsi_mgmt_task *mtask = NULL;
-
- if (conn->in.itt != ISCSI_RESERVED_TAG)
- mtask = (struct iscsi_mgmt_task *)
- session->mgmt_cmds[conn->in.itt -
- ISCSI_MGMT_ITT_OFFSET];
-
+ case ISCSI_OP_NOOP_IN:
+ case ISCSI_OP_ASYNC_EVENT:
+ case ISCSI_OP_REJECT:
/*
* Collect data segment to the connection's data
* placeholder
*/
- if (iscsi_tcp_copy(conn, conn->data, conn->in.datalen)) {
+ if (iscsi_tcp_copy(tcp_conn)) {
rc = -EAGAIN;
goto exit;
}
- rc = iscsi_recv_pdu(conn->cls_conn, conn->in.hdr,
- conn->data, conn->in.datalen);
-
- if (!rc && conn->datadgst_en &&
- conn->in.opcode != ISCSI_OP_LOGIN_RSP)
- iscsi_recv_digest_update(conn, conn->data,
- conn->in.datalen);
-
- if (mtask && conn->login_mtask != mtask) {
- spin_lock(&session->lock);
- __kfifo_put(session->mgmtpool.queue, (void*)&mtask,
- sizeof(void*));
- spin_unlock(&session->lock);
- }
- }
- break;
- case ISCSI_OP_ASYNC_EVENT:
- case ISCSI_OP_REJECT:
+ rc = iscsi_complete_pdu(conn, tcp_conn->in.hdr, tcp_conn->data,
+ tcp_conn->in.datalen);
+ if (!rc && conn->datadgst_en && opcode != ISCSI_OP_LOGIN_RSP)
+ iscsi_recv_digest_update(tcp_conn, tcp_conn->data,
+ tcp_conn->in.datalen);
+ break;
default:
BUG_ON(1);
}
@@ -1080,6 +838,7 @@
{
int rc;
struct iscsi_conn *conn = rd_desc->arg.data;
+ struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
int processed;
char pad[ISCSI_PAD_LEN];
struct scatterlist sg;
@@ -1088,15 +847,15 @@
* Save current SKB and its offset in the corresponding
* connection context.
*/
- conn->in.copy = skb->len - offset;
- conn->in.offset = offset;
- conn->in.skb = skb;
- conn->in.len = conn->in.copy;
- BUG_ON(conn->in.copy <= 0);
- debug_tcp("in %d bytes\n", conn->in.copy);
+ tcp_conn->in.copy = skb->len - offset;
+ tcp_conn->in.offset = offset;
+ tcp_conn->in.skb = skb;
+ tcp_conn->in.len = tcp_conn->in.copy;
+ BUG_ON(tcp_conn->in.copy <= 0);
+ debug_tcp("in %d bytes\n", tcp_conn->in.copy);
more:
- conn->in.copied = 0;
+ tcp_conn->in.copied = 0;
rc = 0;
if (unlikely(conn->suspend_rx)) {
@@ -1104,9 +863,9 @@
return 0;
}
- if (conn->in_progress == IN_PROGRESS_WAIT_HEADER ||
- conn->in_progress == IN_PROGRESS_HEADER_GATHER) {
- rc = iscsi_hdr_extract(conn);
+ if (tcp_conn->in_progress == IN_PROGRESS_WAIT_HEADER ||
+ tcp_conn->in_progress == IN_PROGRESS_HEADER_GATHER) {
+ rc = iscsi_hdr_extract(tcp_conn);
if (rc) {
if (rc == -EAGAIN)
goto nomore;
@@ -1119,90 +878,94 @@
/*
* Verify and process incoming PDU header.
*/
- rc = iscsi_hdr_recv(conn);
- if (!rc && conn->in.datalen) {
+ rc = iscsi_tcp_hdr_recv(conn);
+ if (!rc && tcp_conn->in.datalen) {
if (conn->datadgst_en) {
- BUG_ON(!conn->data_rx_tfm);
- crypto_digest_init(conn->data_rx_tfm);
+ BUG_ON(!tcp_conn->data_rx_tfm);
+ crypto_digest_init(tcp_conn->data_rx_tfm);
}
- conn->in_progress = IN_PROGRESS_DATA_RECV;
+ tcp_conn->in_progress = IN_PROGRESS_DATA_RECV;
} else if (rc) {
iscsi_conn_failure(conn, rc);
return 0;
}
}
- if (conn->in_progress == IN_PROGRESS_DDIGEST_RECV) {
+ if (tcp_conn->in_progress == IN_PROGRESS_DDIGEST_RECV) {
uint32_t recv_digest;
+
debug_tcp("extra data_recv offset %d copy %d\n",
- conn->in.offset, conn->in.copy);
- skb_copy_bits(conn->in.skb, conn->in.offset,
+ tcp_conn->in.offset, tcp_conn->in.copy);
+ skb_copy_bits(tcp_conn->in.skb, tcp_conn->in.offset,
&recv_digest, 4);
- conn->in.offset += 4;
- conn->in.copy -= 4;
- if (recv_digest != conn->in.datadgst) {
+ tcp_conn->in.offset += 4;
+ tcp_conn->in.copy -= 4;
+ if (recv_digest != tcp_conn->in.datadgst) {
debug_tcp("iscsi_tcp: data digest error!"
"0x%x != 0x%x\n", recv_digest,
- conn->in.datadgst);
+ tcp_conn->in.datadgst);
iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST);
return 0;
} else {
debug_tcp("iscsi_tcp: data digest match!"
"0x%x == 0x%x\n", recv_digest,
- conn->in.datadgst);
- conn->in_progress = IN_PROGRESS_WAIT_HEADER;
+ tcp_conn->in.datadgst);
+ tcp_conn->in_progress = IN_PROGRESS_WAIT_HEADER;
}
}
- if (conn->in_progress == IN_PROGRESS_DATA_RECV && conn->in.copy) {
+ if (tcp_conn->in_progress == IN_PROGRESS_DATA_RECV &&
+ tcp_conn->in.copy) {
debug_tcp("data_recv offset %d copy %d\n",
- conn->in.offset, conn->in.copy);
+ tcp_conn->in.offset, tcp_conn->in.copy);
rc = iscsi_data_recv(conn);
if (rc) {
if (rc == -EAGAIN) {
- rd_desc->count = conn->in.datalen -
- conn->in.ctask->data_count;
+ rd_desc->count = tcp_conn->in.datalen -
+ tcp_conn->in.ctask->data_count;
goto again;
}
iscsi_conn_failure(conn, rc);
return 0;
}
- conn->in.copy -= conn->in.padding;
- conn->in.offset += conn->in.padding;
+ tcp_conn->in.copy -= tcp_conn->in.padding;
+ tcp_conn->in.offset += tcp_conn->in.padding;
if (conn->datadgst_en) {
- if (conn->in.padding) {
- debug_tcp("padding -> %d\n", conn->in.padding);
- memset(pad, 0, conn->in.padding);
- sg_init_one(&sg, pad, conn->in.padding);
- crypto_digest_update(conn->data_rx_tfm, &sg, 1);
+ if (tcp_conn->in.padding) {
+ debug_tcp("padding -> %d\n",
+ tcp_conn->in.padding);
+ memset(pad, 0, tcp_conn->in.padding);
+ sg_init_one(&sg, pad, tcp_conn->in.padding);
+ crypto_digest_update(tcp_conn->data_rx_tfm,
+ &sg, 1);
}
- crypto_digest_final(conn->data_rx_tfm,
- (u8 *) & conn->in.datadgst);
- debug_tcp("rx digest 0x%x\n", conn->in.datadgst);
- conn->in_progress = IN_PROGRESS_DDIGEST_RECV;
+ crypto_digest_final(tcp_conn->data_rx_tfm,
+ (u8 *) & tcp_conn->in.datadgst);
+ debug_tcp("rx digest 0x%x\n", tcp_conn->in.datadgst);
+ tcp_conn->in_progress = IN_PROGRESS_DDIGEST_RECV;
} else
- conn->in_progress = IN_PROGRESS_WAIT_HEADER;
+ tcp_conn->in_progress = IN_PROGRESS_WAIT_HEADER;
}
debug_tcp("f, processed %d from out of %d padding %d\n",
- conn->in.offset - offset, (int)len, conn->in.padding);
- BUG_ON(conn->in.offset - offset > len);
+ tcp_conn->in.offset - offset, (int)len, tcp_conn->in.padding);
+ BUG_ON(tcp_conn->in.offset - offset > len);
- if (conn->in.offset - offset != len) {
+ if (tcp_conn->in.offset - offset != len) {
debug_tcp("continue to process %d bytes\n",
- (int)len - (conn->in.offset - offset));
+ (int)len - (tcp_conn->in.offset - offset));
goto more;
}
nomore:
- processed = conn->in.offset - offset;
+ processed = tcp_conn->in.offset - offset;
BUG_ON(processed == 0);
return processed;
again:
- processed = conn->in.offset - offset;
+ processed = tcp_conn->in.offset - offset;
debug_tcp("c, processed %d from out of %d rd_desc_cnt %d\n",
processed, (int)len, (int)rd_desc->count);
BUG_ON(processed == 0);
@@ -1231,6 +994,7 @@
static void
iscsi_tcp_state_change(struct sock *sk)
{
+ struct iscsi_tcp_conn *tcp_conn;
struct iscsi_conn *conn;
struct iscsi_session *session;
void (*old_state_change)(struct sock *);
@@ -1247,7 +1011,8 @@
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
}
- old_state_change = conn->old_state_change;
+ tcp_conn = conn->dd_data;
+ old_state_change = tcp_conn->old_state_change;
read_unlock(&sk->sk_callback_lock);
@@ -1262,23 +1027,26 @@
iscsi_write_space(struct sock *sk)
{
struct iscsi_conn *conn = (struct iscsi_conn*)sk->sk_user_data;
- conn->old_write_space(sk);
+ struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
+
+ tcp_conn->old_write_space(sk);
debug_tcp("iscsi_write_space: cid %d\n", conn->id);
- clear_bit(SUSPEND_BIT, &conn->suspend_tx);
+ clear_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
scsi_queue_work(conn->session->host, &conn->xmitwork);
}
static void
iscsi_conn_set_callbacks(struct iscsi_conn *conn)
{
- struct sock *sk = conn->sock->sk;
+ struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
+ struct sock *sk = tcp_conn->sock->sk;
/* assign new callbacks */
write_lock_bh(&sk->sk_callback_lock);
sk->sk_user_data = conn;
- conn->old_data_ready = sk->sk_data_ready;
- conn->old_state_change = sk->sk_state_change;
- conn->old_write_space = sk->sk_write_space;
+ tcp_conn->old_data_ready = sk->sk_data_ready;
+ tcp_conn->old_state_change = sk->sk_state_change;
+ tcp_conn->old_write_space = sk->sk_write_space;
sk->sk_data_ready = iscsi_tcp_data_ready;
sk->sk_state_change = iscsi_tcp_state_change;
sk->sk_write_space = iscsi_write_space;
@@ -1288,14 +1056,15 @@
static void
iscsi_conn_restore_callbacks(struct iscsi_conn *conn)
{
- struct sock *sk = conn->sock->sk;
+ struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
+ struct sock *sk = tcp_conn->sock->sk;
/* restore socket callbacks, see also: iscsi_conn_set_callbacks() */
write_lock_bh(&sk->sk_callback_lock);
sk->sk_user_data = NULL;
- sk->sk_data_ready = conn->old_data_ready;
- sk->sk_state_change = conn->old_state_change;
- sk->sk_write_space = conn->old_write_space;
+ sk->sk_data_ready = tcp_conn->old_data_ready;
+ sk->sk_state_change = tcp_conn->old_state_change;
+ sk->sk_write_space = tcp_conn->old_write_space;
sk->sk_no_check = 0;
write_unlock_bh(&sk->sk_callback_lock);
}
@@ -1310,7 +1079,8 @@
static inline int
iscsi_send(struct iscsi_conn *conn, struct iscsi_buf *buf, int size, int flags)
{
- struct socket *sk = conn->sock;
+ struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
+ struct socket *sk = tcp_conn->sock;
int offset = buf->sg.offset + buf->sent;
/*
@@ -1324,7 +1094,8 @@
if (buf->use_sendmsg)
return sock_no_sendpage(sk, buf->sg.page, offset, size, flags);
else
- return conn->sendpage(sk, buf->sg.page, offset, size, flags);
+ return tcp_conn->sendpage(sk, buf->sg.page, offset, size,
+ flags);
}
/**
@@ -1339,6 +1110,7 @@
static inline int
iscsi_sendhdr(struct iscsi_conn *conn, struct iscsi_buf *buf, int datalen)
{
+ struct iscsi_tcp_conn *tcp_conn;
int flags = 0; /* MSG_DONTWAIT; */
int res, size;
@@ -1356,8 +1128,9 @@
return -EAGAIN;
return 0;
} else if (res == -EAGAIN) {
- conn->sendpage_failures_cnt++;
- set_bit(SUSPEND_BIT, &conn->suspend_tx);
+ tcp_conn = conn->dd_data;
+ tcp_conn->sendpage_failures_cnt++;
+ set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
} else if (res == -EPIPE)
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
@@ -1378,6 +1151,7 @@
iscsi_sendpage(struct iscsi_conn *conn, struct iscsi_buf *buf,
int *count, int *sent)
{
+ struct iscsi_tcp_conn *tcp_conn;
int flags = 0; /* MSG_DONTWAIT; */
int res, size;
@@ -1400,8 +1174,9 @@
return -EAGAIN;
return 0;
} else if (res == -EAGAIN) {
- conn->sendpage_failures_cnt++;
- set_bit(SUSPEND_BIT, &conn->suspend_tx);
+ tcp_conn = conn->dd_data;
+ tcp_conn->sendpage_failures_cnt++;
+ set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
} else if (res == -EPIPE)
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
@@ -1409,30 +1184,35 @@
}
static inline void
-iscsi_data_digest_init(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
+iscsi_data_digest_init(struct iscsi_tcp_conn *tcp_conn,
+ struct iscsi_cmd_task *ctask)
{
- BUG_ON(!conn->data_tx_tfm);
- crypto_digest_init(conn->data_tx_tfm);
- ctask->digest_count = 4;
+ struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
+
+ BUG_ON(!tcp_conn->data_tx_tfm);
+ crypto_digest_init(tcp_conn->data_tx_tfm);
+ tcp_ctask->digest_count = 4;
}
static int
iscsi_digest_final_send(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask,
struct iscsi_buf *buf, uint32_t *digest, int final)
{
+ struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
+ struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
int rc = 0;
int sent = 0;
if (final)
- crypto_digest_final(conn->data_tx_tfm, (u8*)digest);
+ crypto_digest_final(tcp_conn->data_tx_tfm, (u8*)digest);
iscsi_buf_init_virt(buf, (char*)digest, 4);
- rc = iscsi_sendpage(conn, buf, &ctask->digest_count, &sent);
+ rc = iscsi_sendpage(conn, buf, &tcp_ctask->digest_count, &sent);
if (rc) {
- ctask->datadigest = *digest;
- ctask->xmstate |= XMSTATE_DATA_DIGEST;
+ tcp_ctask->datadigest = *digest;
+ tcp_ctask->xmstate |= XMSTATE_DATA_DIGEST;
} else
- ctask->digest_count = 4;
+ tcp_ctask->digest_count = 4;
return rc;
}
@@ -1453,21 +1233,23 @@
iscsi_solicit_data_cont(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask,
struct iscsi_r2t_info *r2t, int left)
{
+ struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
struct iscsi_data *hdr;
struct iscsi_data_task *dtask;
struct scsi_cmnd *sc = ctask->sc;
int new_offset;
- dtask = mempool_alloc(ctask->datapool, GFP_ATOMIC);
+ dtask = mempool_alloc(tcp_ctask->datapool, GFP_ATOMIC);
BUG_ON(!dtask);
+ INIT_LIST_HEAD(&dtask->item);
hdr = &dtask->hdr;
memset(hdr, 0, sizeof(struct iscsi_data));
hdr->ttt = r2t->ttt;
hdr->datasn = cpu_to_be32(r2t->solicit_datasn);
r2t->solicit_datasn++;
hdr->opcode = ISCSI_OP_SCSI_DATA_OUT;
- memcpy(hdr->lun, ctask->hdr.lun, sizeof(hdr->lun));
- hdr->itt = ctask->hdr.itt;
+ memcpy(hdr->lun, ctask->hdr->lun, sizeof(hdr->lun));
+ hdr->itt = ctask->hdr->itt;
hdr->exp_statsn = r2t->exp_statsn;
new_offset = r2t->data_offset + r2t->sent;
hdr->offset = cpu_to_be32(new_offset);
@@ -1487,175 +1269,102 @@
r2t->dtask = dtask;
if (sc->use_sg && !iscsi_buf_left(&r2t->sendbuf)) {
- BUG_ON(ctask->bad_sg == r2t->sg);
+ BUG_ON(tcp_ctask->bad_sg == r2t->sg);
iscsi_buf_init_sg(&r2t->sendbuf, r2t->sg);
r2t->sg += 1;
} else
- iscsi_buf_init_iov(&ctask->sendbuf,
+ iscsi_buf_init_iov(&tcp_ctask->sendbuf,
(char*)sc->request_buffer + new_offset,
r2t->data_count);
- list_add(&dtask->item, &ctask->dataqueue);
+ list_add(&dtask->item, &tcp_ctask->dataqueue);
}
static void
iscsi_unsolicit_data_init(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
{
- struct iscsi_data *hdr;
+ struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
struct iscsi_data_task *dtask;
- dtask = mempool_alloc(ctask->datapool, GFP_ATOMIC);
+ dtask = mempool_alloc(tcp_ctask->datapool, GFP_ATOMIC);
BUG_ON(!dtask);
- hdr = &dtask->hdr;
- memset(hdr, 0, sizeof(struct iscsi_data));
- hdr->ttt = cpu_to_be32(ISCSI_RESERVED_TAG);
- hdr->datasn = cpu_to_be32(ctask->unsol_datasn);
- ctask->unsol_datasn++;
- hdr->opcode = ISCSI_OP_SCSI_DATA_OUT;
- memcpy(hdr->lun, ctask->hdr.lun, sizeof(hdr->lun));
- hdr->itt = ctask->hdr.itt;
- hdr->exp_statsn = cpu_to_be32(conn->exp_statsn);
- hdr->offset = cpu_to_be32(ctask->total_length -
- ctask->r2t_data_count -
- ctask->unsol_count);
- if (ctask->unsol_count > conn->max_xmit_dlength) {
- hton24(hdr->dlength, conn->max_xmit_dlength);
- ctask->data_count = conn->max_xmit_dlength;
- hdr->flags = 0;
- } else {
- hton24(hdr->dlength, ctask->unsol_count);
- ctask->data_count = ctask->unsol_count;
- hdr->flags = ISCSI_FLAG_CMD_FINAL;
- }
+ INIT_LIST_HEAD(&dtask->item);
- iscsi_buf_init_virt(&ctask->headbuf, (char*)hdr,
+ iscsi_prep_unsolicit_data_pdu(ctask, &dtask->hdr,
+ tcp_ctask->r2t_data_count);
+ iscsi_buf_init_virt(&tcp_ctask->headbuf, (char*)&dtask->hdr,
sizeof(struct iscsi_hdr));
- list_add(&dtask->item, &ctask->dataqueue);
-
- ctask->dtask = dtask;
+ list_add(&dtask->item, &tcp_ctask->dataqueue);
+ tcp_ctask->dtask = dtask;
}
/**
- * iscsi_cmd_init - Initialize iSCSI SCSI_READ or SCSI_WRITE commands
+ * iscsi_tcp_cmd_init - Initialize iSCSI SCSI_READ or SCSI_WRITE commands
* @conn: iscsi connection
* @ctask: scsi command task
* @sc: scsi command
**/
static void
-iscsi_cmd_init(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask,
- struct scsi_cmnd *sc)
+iscsi_tcp_cmd_init(struct iscsi_cmd_task *ctask)
{
- struct iscsi_session *session = conn->session;
+ struct scsi_cmnd *sc = ctask->sc;
+ struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
- BUG_ON(__kfifo_len(ctask->r2tqueue));
+ BUG_ON(__kfifo_len(tcp_ctask->r2tqueue));
- ctask->sc = sc;
- ctask->conn = conn;
- ctask->hdr.opcode = ISCSI_OP_SCSI_CMD;
- ctask->hdr.flags = ISCSI_ATTR_SIMPLE;
- int_to_scsilun(sc->device->lun, (struct scsi_lun *)ctask->hdr.lun);
- ctask->hdr.itt = ctask->itt | (conn->id << CID_SHIFT) |
- (session->age << AGE_SHIFT);
- ctask->hdr.data_length = cpu_to_be32(sc->request_bufflen);
- ctask->hdr.cmdsn = cpu_to_be32(session->cmdsn); session->cmdsn++;
- ctask->hdr.exp_statsn = cpu_to_be32(conn->exp_statsn);
- memcpy(ctask->hdr.cdb, sc->cmnd, sc->cmd_len);
- memset(&ctask->hdr.cdb[sc->cmd_len], 0, MAX_COMMAND_SIZE - sc->cmd_len);
-
- ctask->mtask = NULL;
- ctask->sent = 0;
- ctask->sg_count = 0;
-
- ctask->total_length = sc->request_bufflen;
+ tcp_ctask->sent = 0;
+ tcp_ctask->sg_count = 0;
if (sc->sc_data_direction == DMA_TO_DEVICE) {
- ctask->exp_r2tsn = 0;
- ctask->hdr.flags |= ISCSI_FLAG_CMD_WRITE;
+ tcp_ctask->xmstate = XMSTATE_W_HDR;
+ tcp_ctask->exp_r2tsn = 0;
BUG_ON(ctask->total_length == 0);
+
if (sc->use_sg) {
struct scatterlist *sg = sc->request_buffer;
- iscsi_buf_init_sg(&ctask->sendbuf,
- &sg[ctask->sg_count++]);
- ctask->sg = sg;
- ctask->bad_sg = sg + sc->use_sg;
- } else {
- iscsi_buf_init_iov(&ctask->sendbuf, sc->request_buffer,
- sc->request_bufflen);
- }
-
- /*
- * Write counters:
- *
- * imm_count bytes to be sent right after
- * SCSI PDU Header
- *
- * unsol_count bytes(as Data-Out) to be sent
- * without R2T ack right after
- * immediate data
- *
- * r2t_data_count bytes to be sent via R2T ack's
- *
- * pad_count bytes to be sent as zero-padding
- */
- ctask->imm_count = 0;
- ctask->unsol_count = 0;
- ctask->unsol_datasn = 0;
- ctask->xmstate = XMSTATE_W_HDR;
- /* calculate write padding */
- ctask->pad_count = ctask->total_length & (ISCSI_PAD_LEN-1);
- if (ctask->pad_count) {
- ctask->pad_count = ISCSI_PAD_LEN - ctask->pad_count;
- debug_scsi("write padding %d bytes\n",
- ctask->pad_count);
- ctask->xmstate |= XMSTATE_W_PAD;
- }
- if (session->imm_data_en) {
- if (ctask->total_length >= session->first_burst)
- ctask->imm_count = min(session->first_burst,
- conn->max_xmit_dlength);
- else
- ctask->imm_count = min(ctask->total_length,
- conn->max_xmit_dlength);
- hton24(ctask->hdr.dlength, ctask->imm_count);
- ctask->xmstate |= XMSTATE_IMM_DATA;
+ iscsi_buf_init_sg(&tcp_ctask->sendbuf,
+ &sg[tcp_ctask->sg_count++]);
+ tcp_ctask->sg = sg;
+ tcp_ctask->bad_sg = sg + sc->use_sg;
} else
- zero_data(ctask->hdr.dlength);
+ iscsi_buf_init_iov(&tcp_ctask->sendbuf,
+ sc->request_buffer,
+ sc->request_bufflen);
- if (!session->initial_r2t_en)
- ctask->unsol_count = min(session->first_burst,
- ctask->total_length) - ctask->imm_count;
- if (!ctask->unsol_count)
- /* No unsolicit Data-Out's */
- ctask->hdr.flags |= ISCSI_FLAG_CMD_FINAL;
- else
- ctask->xmstate |= XMSTATE_UNS_HDR | XMSTATE_UNS_INIT;
+ if (ctask->imm_count)
+ tcp_ctask->xmstate |= XMSTATE_IMM_DATA;
- ctask->r2t_data_count = ctask->total_length -
+ tcp_ctask->pad_count = ctask->total_length & (ISCSI_PAD_LEN-1);
+ if (tcp_ctask->pad_count) {
+ tcp_ctask->pad_count = ISCSI_PAD_LEN -
+ tcp_ctask->pad_count;
+ debug_scsi("write padding %d bytes\n",
+ tcp_ctask->pad_count);
+ tcp_ctask->xmstate |= XMSTATE_W_PAD;
+ }
+
+ if (ctask->unsol_count)
+ tcp_ctask->xmstate |= XMSTATE_UNS_HDR |
+ XMSTATE_UNS_INIT;
+ tcp_ctask->r2t_data_count = ctask->total_length -
ctask->imm_count -
ctask->unsol_count;
debug_scsi("cmd [itt %x total %d imm %d imm_data %d "
"r2t_data %d]\n",
ctask->itt, ctask->total_length, ctask->imm_count,
- ctask->unsol_count, ctask->r2t_data_count);
- } else {
- ctask->hdr.flags |= ISCSI_FLAG_CMD_FINAL;
- if (sc->sc_data_direction == DMA_FROM_DEVICE)
- ctask->hdr.flags |= ISCSI_FLAG_CMD_READ;
- ctask->datasn = 0;
- ctask->xmstate = XMSTATE_R_HDR;
- zero_data(ctask->hdr.dlength);
- }
+ ctask->unsol_count, tcp_ctask->r2t_data_count);
+ } else
+ tcp_ctask->xmstate = XMSTATE_R_HDR;
- iscsi_buf_init_virt(&ctask->headbuf, (char*)&ctask->hdr,
+ iscsi_buf_init_virt(&tcp_ctask->headbuf, (char*)ctask->hdr,
sizeof(struct iscsi_hdr));
- conn->scsicmd_pdus_cnt++;
}
/**
- * iscsi_mtask_xmit - xmit management(immediate) task
+ * iscsi_tcp_mtask_xmit - xmit management(immediate) task
* @conn: iscsi connection
* @mtask: task management task
*
@@ -1669,70 +1378,87 @@
* IN_PROGRESS_IMM_DATA - PDU Data xmit in progress
**/
static int
-iscsi_mtask_xmit(struct iscsi_conn *conn, struct iscsi_mgmt_task *mtask)
+iscsi_tcp_mtask_xmit(struct iscsi_conn *conn, struct iscsi_mgmt_task *mtask)
{
+ struct iscsi_tcp_mgmt_task *tcp_mtask = mtask->dd_data;
debug_scsi("mtask deq [cid %d state %x itt 0x%x]\n",
- conn->id, mtask->xmstate, mtask->itt);
+ conn->id, tcp_mtask->xmstate, mtask->itt);
- if (mtask->xmstate & XMSTATE_IMM_HDR) {
- mtask->xmstate &= ~XMSTATE_IMM_HDR;
+ if (tcp_mtask->xmstate & XMSTATE_IMM_HDR) {
+ tcp_mtask->xmstate &= ~XMSTATE_IMM_HDR;
if (mtask->data_count)
- mtask->xmstate |= XMSTATE_IMM_DATA;
+ tcp_mtask->xmstate |= XMSTATE_IMM_DATA;
if (conn->c_stage != ISCSI_CONN_INITIAL_STAGE &&
- conn->stop_stage != STOP_CONN_RECOVER &&
+ conn->stop_stage != STOP_CONN_RECOVER &&
conn->hdrdgst_en)
- iscsi_hdr_digest(conn, &mtask->headbuf,
- (u8*)mtask->hdrext);
- if (iscsi_sendhdr(conn, &mtask->headbuf, mtask->data_count)) {
- mtask->xmstate |= XMSTATE_IMM_HDR;
+ iscsi_hdr_digest(conn, &tcp_mtask->headbuf,
+ (u8*)tcp_mtask->hdrext);
+ if (iscsi_sendhdr(conn, &tcp_mtask->headbuf,
+ mtask->data_count)) {
+ tcp_mtask->xmstate |= XMSTATE_IMM_HDR;
if (mtask->data_count)
- mtask->xmstate &= ~XMSTATE_IMM_DATA;
+ tcp_mtask->xmstate &= ~XMSTATE_IMM_DATA;
return -EAGAIN;
}
}
- if (mtask->xmstate & XMSTATE_IMM_DATA) {
+ if (tcp_mtask->xmstate & XMSTATE_IMM_DATA) {
BUG_ON(!mtask->data_count);
- mtask->xmstate &= ~XMSTATE_IMM_DATA;
+ tcp_mtask->xmstate &= ~XMSTATE_IMM_DATA;
/* FIXME: implement.
* Virtual buffer could be spreaded across multiple pages...
*/
do {
- if (iscsi_sendpage(conn, &mtask->sendbuf,
- &mtask->data_count, &mtask->sent)) {
- mtask->xmstate |= XMSTATE_IMM_DATA;
+ if (iscsi_sendpage(conn, &tcp_mtask->sendbuf,
+ &mtask->data_count, &tcp_mtask->sent)) {
+ tcp_mtask->xmstate |= XMSTATE_IMM_DATA;
return -EAGAIN;
}
} while (mtask->data_count);
}
- BUG_ON(mtask->xmstate != XMSTATE_IDLE);
+ BUG_ON(tcp_mtask->xmstate != XMSTATE_IDLE);
+ if (mtask->hdr->itt == cpu_to_be32(ISCSI_RESERVED_TAG)) {
+ struct iscsi_session *session = conn->session;
+
+ spin_lock_bh(&session->lock);
+ list_del(&conn->mtask->running);
+ __kfifo_put(session->mgmtpool.queue, (void*)&conn->mtask,
+ sizeof(void*));
+ spin_unlock_bh(&session->lock);
+ }
return 0;
}
static inline int
-handle_xmstate_r_hdr(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
+handle_xmstate_r_hdr(struct iscsi_conn *conn,
+ struct iscsi_tcp_cmd_task *tcp_ctask)
{
- ctask->xmstate &= ~XMSTATE_R_HDR;
+ tcp_ctask->xmstate &= ~XMSTATE_R_HDR;
if (conn->hdrdgst_en)
- iscsi_hdr_digest(conn, &ctask->headbuf, (u8*)ctask->hdrext);
- if (!iscsi_sendhdr(conn, &ctask->headbuf, 0)) {
- BUG_ON(ctask->xmstate != XMSTATE_IDLE);
+ iscsi_hdr_digest(conn, &tcp_ctask->headbuf,
+ (u8*)tcp_ctask->hdrext);
+ if (!iscsi_sendhdr(conn, &tcp_ctask->headbuf, 0)) {
+ BUG_ON(tcp_ctask->xmstate != XMSTATE_IDLE);
return 0; /* wait for Data-In */
}
- ctask->xmstate |= XMSTATE_R_HDR;
+ tcp_ctask->xmstate |= XMSTATE_R_HDR;
return -EAGAIN;
}
static inline int
-handle_xmstate_w_hdr(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
+handle_xmstate_w_hdr(struct iscsi_conn *conn,
+ struct iscsi_cmd_task *ctask)
{
- ctask->xmstate &= ~XMSTATE_W_HDR;
+ struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
+
+ tcp_ctask->xmstate &= ~XMSTATE_W_HDR;
if (conn->hdrdgst_en)
- iscsi_hdr_digest(conn, &ctask->headbuf, (u8*)ctask->hdrext);
- if (iscsi_sendhdr(conn, &ctask->headbuf, ctask->imm_count)) {
- ctask->xmstate |= XMSTATE_W_HDR;
+ iscsi_hdr_digest(conn, &tcp_ctask->headbuf,
+ (u8*)tcp_ctask->hdrext);
+ if (iscsi_sendhdr(conn, &tcp_ctask->headbuf, ctask->imm_count)) {
+ tcp_ctask->xmstate |= XMSTATE_W_HDR;
return -EAGAIN;
}
return 0;
@@ -1742,13 +1468,15 @@
handle_xmstate_data_digest(struct iscsi_conn *conn,
struct iscsi_cmd_task *ctask)
{
- ctask->xmstate &= ~XMSTATE_DATA_DIGEST;
- debug_tcp("resent data digest 0x%x\n", ctask->datadigest);
- if (iscsi_digest_final_send(conn, ctask, &ctask->immbuf,
- &ctask->datadigest, 0)) {
- ctask->xmstate |= XMSTATE_DATA_DIGEST;
+ struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
+
+ tcp_ctask->xmstate &= ~XMSTATE_DATA_DIGEST;
+ debug_tcp("resent data digest 0x%x\n", tcp_ctask->datadigest);
+ if (iscsi_digest_final_send(conn, ctask, &tcp_ctask->immbuf,
+ &tcp_ctask->datadigest, 0)) {
+ tcp_ctask->xmstate |= XMSTATE_DATA_DIGEST;
debug_tcp("resent data digest 0x%x fail!\n",
- ctask->datadigest);
+ tcp_ctask->datadigest);
return -EAGAIN;
}
return 0;
@@ -1757,44 +1485,47 @@
static inline int
handle_xmstate_imm_data(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
{
+ struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
+ struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
+
BUG_ON(!ctask->imm_count);
- ctask->xmstate &= ~XMSTATE_IMM_DATA;
+ tcp_ctask->xmstate &= ~XMSTATE_IMM_DATA;
if (conn->datadgst_en) {
- iscsi_data_digest_init(conn, ctask);
- ctask->immdigest = 0;
+ iscsi_data_digest_init(tcp_conn, ctask);
+ tcp_ctask->immdigest = 0;
}
for (;;) {
- if (iscsi_sendpage(conn, &ctask->sendbuf, &ctask->imm_count,
- &ctask->sent)) {
- ctask->xmstate |= XMSTATE_IMM_DATA;
+ if (iscsi_sendpage(conn, &tcp_ctask->sendbuf, &ctask->imm_count,
+ &tcp_ctask->sent)) {
+ tcp_ctask->xmstate |= XMSTATE_IMM_DATA;
if (conn->datadgst_en) {
- crypto_digest_final(conn->data_tx_tfm,
- (u8*)&ctask->immdigest);
+ crypto_digest_final(tcp_conn->data_tx_tfm,
+ (u8*)&tcp_ctask->immdigest);
debug_tcp("tx imm sendpage fail 0x%x\n",
- ctask->datadigest);
+ tcp_ctask->datadigest);
}
return -EAGAIN;
}
if (conn->datadgst_en)
- crypto_digest_update(conn->data_tx_tfm,
- &ctask->sendbuf.sg, 1);
+ crypto_digest_update(tcp_conn->data_tx_tfm,
+ &tcp_ctask->sendbuf.sg, 1);
if (!ctask->imm_count)
break;
- iscsi_buf_init_sg(&ctask->sendbuf,
- &ctask->sg[ctask->sg_count++]);
+ iscsi_buf_init_sg(&tcp_ctask->sendbuf,
+ &tcp_ctask->sg[tcp_ctask->sg_count++]);
}
- if (conn->datadgst_en && !(ctask->xmstate & XMSTATE_W_PAD)) {
- if (iscsi_digest_final_send(conn, ctask, &ctask->immbuf,
- &ctask->immdigest, 1)) {
+ if (conn->datadgst_en && !(tcp_ctask->xmstate & XMSTATE_W_PAD)) {
+ if (iscsi_digest_final_send(conn, ctask, &tcp_ctask->immbuf,
+ &tcp_ctask->immdigest, 1)) {
debug_tcp("sending imm digest 0x%x fail!\n",
- ctask->immdigest);
+ tcp_ctask->immdigest);
return -EAGAIN;
}
- debug_tcp("sending imm digest 0x%x\n", ctask->immdigest);
+ debug_tcp("sending imm digest 0x%x\n", tcp_ctask->immdigest);
}
return 0;
@@ -1803,52 +1534,55 @@
static inline int
handle_xmstate_uns_hdr(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
{
+ struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
struct iscsi_data_task *dtask;
- ctask->xmstate |= XMSTATE_UNS_DATA;
- if (ctask->xmstate & XMSTATE_UNS_INIT) {
+ tcp_ctask->xmstate |= XMSTATE_UNS_DATA;
+ if (tcp_ctask->xmstate & XMSTATE_UNS_INIT) {
iscsi_unsolicit_data_init(conn, ctask);
- BUG_ON(!ctask->dtask);
- dtask = ctask->dtask;
+ BUG_ON(!tcp_ctask->dtask);
+ dtask = tcp_ctask->dtask;
if (conn->hdrdgst_en)
- iscsi_hdr_digest(conn, &ctask->headbuf,
+ iscsi_hdr_digest(conn, &tcp_ctask->headbuf,
(u8*)dtask->hdrext);
- ctask->xmstate &= ~XMSTATE_UNS_INIT;
+ tcp_ctask->xmstate &= ~XMSTATE_UNS_INIT;
}
- if (iscsi_sendhdr(conn, &ctask->headbuf, ctask->data_count)) {
- ctask->xmstate &= ~XMSTATE_UNS_DATA;
- ctask->xmstate |= XMSTATE_UNS_HDR;
+ if (iscsi_sendhdr(conn, &tcp_ctask->headbuf, ctask->data_count)) {
+ tcp_ctask->xmstate &= ~XMSTATE_UNS_DATA;
+ tcp_ctask->xmstate |= XMSTATE_UNS_HDR;
return -EAGAIN;
}
debug_scsi("uns dout [itt 0x%x dlen %d sent %d]\n",
- ctask->itt, ctask->unsol_count, ctask->sent);
+ ctask->itt, ctask->unsol_count, tcp_ctask->sent);
return 0;
}
static inline int
handle_xmstate_uns_data(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
{
- struct iscsi_data_task *dtask = ctask->dtask;
+ struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
+ struct iscsi_data_task *dtask = tcp_ctask->dtask;
+ struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
BUG_ON(!ctask->data_count);
- ctask->xmstate &= ~XMSTATE_UNS_DATA;
+ tcp_ctask->xmstate &= ~XMSTATE_UNS_DATA;
if (conn->datadgst_en) {
- iscsi_data_digest_init(conn, ctask);
+ iscsi_data_digest_init(tcp_conn, ctask);
dtask->digest = 0;
}
for (;;) {
- int start = ctask->sent;
+ int start = tcp_ctask->sent;
- if (iscsi_sendpage(conn, &ctask->sendbuf, &ctask->data_count,
- &ctask->sent)) {
- ctask->unsol_count -= ctask->sent - start;
- ctask->xmstate |= XMSTATE_UNS_DATA;
+ if (iscsi_sendpage(conn, &tcp_ctask->sendbuf,
+ &ctask->data_count, &tcp_ctask->sent)) {
+ ctask->unsol_count -= tcp_ctask->sent - start;
+ tcp_ctask->xmstate |= XMSTATE_UNS_DATA;
/* will continue with this ctask later.. */
if (conn->datadgst_en) {
- crypto_digest_final(conn->data_tx_tfm,
+ crypto_digest_final(tcp_conn->data_tx_tfm,
(u8 *)&dtask->digest);
debug_tcp("tx uns data fail 0x%x\n",
dtask->digest);
@@ -1856,21 +1590,21 @@
return -EAGAIN;
}
- BUG_ON(ctask->sent > ctask->total_length);
- ctask->unsol_count -= ctask->sent - start;
+ BUG_ON(tcp_ctask->sent > ctask->total_length);
+ ctask->unsol_count -= tcp_ctask->sent - start;
/*
* XXX:we may run here with un-initial sendbuf.
* so pass it
*/
- if (conn->datadgst_en && ctask->sent - start > 0)
- crypto_digest_update(conn->data_tx_tfm,
- &ctask->sendbuf.sg, 1);
+ if (conn->datadgst_en && tcp_ctask->sent - start > 0)
+ crypto_digest_update(tcp_conn->data_tx_tfm,
+ &tcp_ctask->sendbuf.sg, 1);
if (!ctask->data_count)
break;
- iscsi_buf_init_sg(&ctask->sendbuf,
- &ctask->sg[ctask->sg_count++]);
+ iscsi_buf_init_sg(&tcp_ctask->sendbuf,
+ &tcp_ctask->sg[tcp_ctask->sg_count++]);
}
BUG_ON(ctask->unsol_count < 0);
@@ -1890,11 +1624,11 @@
debug_tcp("sending uns digest 0x%x, more uns\n",
dtask->digest);
}
- ctask->xmstate |= XMSTATE_UNS_INIT;
+ tcp_ctask->xmstate |= XMSTATE_UNS_INIT;
return 1;
}
- if (conn->datadgst_en && !(ctask->xmstate & XMSTATE_W_PAD)) {
+ if (conn->datadgst_en && !(tcp_ctask->xmstate & XMSTATE_W_PAD)) {
if (iscsi_digest_final_send(conn, ctask,
&dtask->digestbuf,
&dtask->digest, 1)) {
@@ -1912,15 +1646,17 @@
handle_xmstate_sol_data(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
{
struct iscsi_session *session = conn->session;
- struct iscsi_r2t_info *r2t = ctask->r2t;
+ struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
+ struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
+ struct iscsi_r2t_info *r2t = tcp_ctask->r2t;
struct iscsi_data_task *dtask = r2t->dtask;
int left;
- ctask->xmstate &= ~XMSTATE_SOL_DATA;
- ctask->dtask = dtask;
+ tcp_ctask->xmstate &= ~XMSTATE_SOL_DATA;
+ tcp_ctask->dtask = dtask;
if (conn->datadgst_en) {
- iscsi_data_digest_init(conn, ctask);
+ iscsi_data_digest_init(tcp_conn, ctask);
dtask->digest = 0;
}
solicit_again:
@@ -1931,10 +1667,10 @@
goto data_out_done;
if (iscsi_sendpage(conn, &r2t->sendbuf, &r2t->data_count, &r2t->sent)) {
- ctask->xmstate |= XMSTATE_SOL_DATA;
+ tcp_ctask->xmstate |= XMSTATE_SOL_DATA;
/* will continue with this ctask later.. */
if (conn->datadgst_en) {
- crypto_digest_final(conn->data_tx_tfm,
+ crypto_digest_final(tcp_conn->data_tx_tfm,
(u8 *)&dtask->digest);
debug_tcp("r2t data send fail 0x%x\n", dtask->digest);
}
@@ -1943,12 +1679,13 @@
BUG_ON(r2t->data_count < 0);
if (conn->datadgst_en)
- crypto_digest_update(conn->data_tx_tfm, &r2t->sendbuf.sg, 1);
+ crypto_digest_update(tcp_conn->data_tx_tfm, &r2t->sendbuf.sg,
+ 1);
if (r2t->data_count) {
BUG_ON(ctask->sc->use_sg == 0);
if (!iscsi_buf_left(&r2t->sendbuf)) {
- BUG_ON(ctask->bad_sg == r2t->sg);
+ BUG_ON(tcp_ctask->bad_sg == r2t->sg);
iscsi_buf_init_sg(&r2t->sendbuf, r2t->sg);
r2t->sg += 1;
}
@@ -1975,8 +1712,8 @@
dtask->digest);
}
iscsi_solicit_data_cont(conn, ctask, r2t, left);
- ctask->xmstate |= XMSTATE_SOL_DATA;
- ctask->xmstate &= ~XMSTATE_SOL_HDR;
+ tcp_ctask->xmstate |= XMSTATE_SOL_DATA;
+ tcp_ctask->xmstate &= ~XMSTATE_SOL_HDR;
return 1;
}
@@ -1984,7 +1721,7 @@
* Done with this R2T. Check if there are more
* outstanding R2Ts ready to be processed.
*/
- BUG_ON(ctask->r2t_data_count - r2t->data_length < 0);
+ BUG_ON(tcp_ctask->r2t_data_count - r2t->data_length < 0);
if (conn->datadgst_en) {
if (iscsi_digest_final_send(conn, ctask, &dtask->digestbuf,
&dtask->digest, 1)) {
@@ -1995,15 +1732,15 @@
debug_tcp("r2t done dout digest 0x%x\n", dtask->digest);
}
- ctask->r2t_data_count -= r2t->data_length;
- ctask->r2t = NULL;
+ tcp_ctask->r2t_data_count -= r2t->data_length;
+ tcp_ctask->r2t = NULL;
spin_lock_bh(&session->lock);
- __kfifo_put(ctask->r2tpool.queue, (void*)&r2t, sizeof(void*));
+ __kfifo_put(tcp_ctask->r2tpool.queue, (void*)&r2t, sizeof(void*));
spin_unlock_bh(&session->lock);
- if (__kfifo_get(ctask->r2tqueue, (void*)&r2t, sizeof(void*))) {
- ctask->r2t = r2t;
- ctask->xmstate |= XMSTATE_SOL_DATA;
- ctask->xmstate &= ~XMSTATE_SOL_HDR;
+ if (__kfifo_get(tcp_ctask->r2tqueue, (void*)&r2t, sizeof(void*))) {
+ tcp_ctask->r2t = r2t;
+ tcp_ctask->xmstate |= XMSTATE_SOL_DATA;
+ tcp_ctask->xmstate &= ~XMSTATE_SOL_HDR;
return 1;
}
@@ -2013,29 +1750,34 @@
static inline int
handle_xmstate_w_pad(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
{
- struct iscsi_data_task *dtask = ctask->dtask;
+ struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
+ struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
+ struct iscsi_data_task *dtask = tcp_ctask->dtask;
int sent;
- ctask->xmstate &= ~XMSTATE_W_PAD;
- iscsi_buf_init_virt(&ctask->sendbuf, (char*)&ctask->pad,
- ctask->pad_count);
- if (iscsi_sendpage(conn, &ctask->sendbuf, &ctask->pad_count, &sent)) {
- ctask->xmstate |= XMSTATE_W_PAD;
+ tcp_ctask->xmstate &= ~XMSTATE_W_PAD;
+ iscsi_buf_init_virt(&tcp_ctask->sendbuf, (char*)&tcp_ctask->pad,
+ tcp_ctask->pad_count);
+ if (iscsi_sendpage(conn, &tcp_ctask->sendbuf, &tcp_ctask->pad_count,
+ &sent)) {
+ tcp_ctask->xmstate |= XMSTATE_W_PAD;
return -EAGAIN;
}
if (conn->datadgst_en) {
- crypto_digest_update(conn->data_tx_tfm, &ctask->sendbuf.sg, 1);
+ crypto_digest_update(tcp_conn->data_tx_tfm,
+ &tcp_ctask->sendbuf.sg, 1);
/* imm data? */
if (!dtask) {
- if (iscsi_digest_final_send(conn, ctask, &ctask->immbuf,
- &ctask->immdigest, 1)) {
+ if (iscsi_digest_final_send(conn, ctask,
+ &tcp_ctask->immbuf,
+ &tcp_ctask->immdigest, 1)) {
debug_tcp("send padding digest 0x%x"
- "fail!\n", ctask->immdigest);
+ "fail!\n", tcp_ctask->immdigest);
return -EAGAIN;
}
debug_tcp("done with padding, digest 0x%x\n",
- ctask->datadigest);
+ tcp_ctask->datadigest);
} else {
if (iscsi_digest_final_send(conn, ctask,
&dtask->digestbuf,
@@ -2053,12 +1795,13 @@
}
static int
-iscsi_ctask_xmit(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
+iscsi_tcp_ctask_xmit(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
{
+ struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
int rc = 0;
debug_scsi("ctask deq [cid %d xmstate %x itt 0x%x]\n",
- conn->id, ctask->xmstate, ctask->itt);
+ conn->id, tcp_ctask->xmstate, ctask->itt);
/*
* serialize with TMF AbortTask
@@ -2066,40 +1809,40 @@
if (ctask->mtask)
return rc;
- if (ctask->xmstate & XMSTATE_R_HDR) {
- rc = handle_xmstate_r_hdr(conn, ctask);
+ if (tcp_ctask->xmstate & XMSTATE_R_HDR) {
+ rc = handle_xmstate_r_hdr(conn, tcp_ctask);
return rc;
}
- if (ctask->xmstate & XMSTATE_W_HDR) {
+ if (tcp_ctask->xmstate & XMSTATE_W_HDR) {
rc = handle_xmstate_w_hdr(conn, ctask);
if (rc)
return rc;
}
/* XXX: for data digest xmit recover */
- if (ctask->xmstate & XMSTATE_DATA_DIGEST) {
+ if (tcp_ctask->xmstate & XMSTATE_DATA_DIGEST) {
rc = handle_xmstate_data_digest(conn, ctask);
if (rc)
return rc;
}
- if (ctask->xmstate & XMSTATE_IMM_DATA) {
+ if (tcp_ctask->xmstate & XMSTATE_IMM_DATA) {
rc = handle_xmstate_imm_data(conn, ctask);
if (rc)
return rc;
}
- if (ctask->xmstate & XMSTATE_UNS_HDR) {
+ if (tcp_ctask->xmstate & XMSTATE_UNS_HDR) {
BUG_ON(!ctask->unsol_count);
- ctask->xmstate &= ~XMSTATE_UNS_HDR;
+ tcp_ctask->xmstate &= ~XMSTATE_UNS_HDR;
unsolicit_head_again:
rc = handle_xmstate_uns_hdr(conn, ctask);
if (rc)
return rc;
}
- if (ctask->xmstate & XMSTATE_UNS_DATA) {
+ if (tcp_ctask->xmstate & XMSTATE_UNS_DATA) {
rc = handle_xmstate_uns_data(conn, ctask);
if (rc == 1)
goto unsolicit_head_again;
@@ -2108,22 +1851,22 @@
goto done;
}
- if (ctask->xmstate & XMSTATE_SOL_HDR) {
+ if (tcp_ctask->xmstate & XMSTATE_SOL_HDR) {
struct iscsi_r2t_info *r2t;
- ctask->xmstate &= ~XMSTATE_SOL_HDR;
- ctask->xmstate |= XMSTATE_SOL_DATA;
- if (!ctask->r2t)
- __kfifo_get(ctask->r2tqueue, (void*)&ctask->r2t,
+ tcp_ctask->xmstate &= ~XMSTATE_SOL_HDR;
+ tcp_ctask->xmstate |= XMSTATE_SOL_DATA;
+ if (!tcp_ctask->r2t)
+ __kfifo_get(tcp_ctask->r2tqueue, (void*)&tcp_ctask->r2t,
sizeof(void*));
solicit_head_again:
- r2t = ctask->r2t;
+ r2t = tcp_ctask->r2t;
if (conn->hdrdgst_en)
iscsi_hdr_digest(conn, &r2t->headbuf,
(u8*)r2t->dtask->hdrext);
if (iscsi_sendhdr(conn, &r2t->headbuf, r2t->data_count)) {
- ctask->xmstate &= ~XMSTATE_SOL_DATA;
- ctask->xmstate |= XMSTATE_SOL_HDR;
+ tcp_ctask->xmstate &= ~XMSTATE_SOL_DATA;
+ tcp_ctask->xmstate |= XMSTATE_SOL_HDR;
return -EAGAIN;
}
@@ -2132,7 +1875,7 @@
r2t->sent);
}
- if (ctask->xmstate & XMSTATE_SOL_DATA) {
+ if (tcp_ctask->xmstate & XMSTATE_SOL_DATA) {
rc = handle_xmstate_sol_data(conn, ctask);
if (rc == 1)
goto solicit_head_again;
@@ -2145,490 +1888,98 @@
* Last thing to check is whether we need to send write
* padding. Note that we check for xmstate equality, not just the bit.
*/
- if (ctask->xmstate == XMSTATE_W_PAD)
+ if (tcp_ctask->xmstate == XMSTATE_W_PAD)
rc = handle_xmstate_w_pad(conn, ctask);
return rc;
}
-/**
- * iscsi_data_xmit - xmit any command into the scheduled connection
- * @conn: iscsi connection
- *
- * Notes:
- * The function can return -EAGAIN in which case the caller must
- * re-schedule it again later or recover. '0' return code means
- * successful xmit.
- **/
-static int
-iscsi_data_xmit(struct iscsi_conn *conn)
-{
- if (unlikely(conn->suspend_tx)) {
- debug_tcp("conn %d Tx suspended!\n", conn->id);
- return 0;
- }
-
- /*
- * Transmit in the following order:
- *
- * 1) un-finished xmit (ctask or mtask)
- * 2) immediate control PDUs
- * 3) write data
- * 4) SCSI commands
- * 5) non-immediate control PDUs
- *
- * No need to lock around __kfifo_get as long as
- * there's one producer and one consumer.
- */
-
- BUG_ON(conn->ctask && conn->mtask);
-
- if (conn->ctask) {
- if (iscsi_ctask_xmit(conn, conn->ctask))
- goto again;
- /* done with this in-progress ctask */
- conn->ctask = NULL;
- }
- if (conn->mtask) {
- if (iscsi_mtask_xmit(conn, conn->mtask))
- goto again;
- /* done with this in-progress mtask */
- conn->mtask = NULL;
- }
-
- /* process immediate first */
- if (unlikely(__kfifo_len(conn->immqueue))) {
- struct iscsi_session *session = conn->session;
- while (__kfifo_get(conn->immqueue, (void*)&conn->mtask,
- sizeof(void*))) {
- if (iscsi_mtask_xmit(conn, conn->mtask))
- goto again;
-
- if (conn->mtask->hdr.itt ==
- cpu_to_be32(ISCSI_RESERVED_TAG)) {
- spin_lock_bh(&session->lock);
- __kfifo_put(session->mgmtpool.queue,
- (void*)&conn->mtask, sizeof(void*));
- spin_unlock_bh(&session->lock);
- }
- }
- /* done with this mtask */
- conn->mtask = NULL;
- }
-
- /* process write queue */
- while (__kfifo_get(conn->writequeue, (void*)&conn->ctask,
- sizeof(void*))) {
- if (iscsi_ctask_xmit(conn, conn->ctask))
- goto again;
- }
-
- /* process command queue */
- while (__kfifo_get(conn->xmitqueue, (void*)&conn->ctask,
- sizeof(void*))) {
- if (iscsi_ctask_xmit(conn, conn->ctask))
- goto again;
- }
- /* done with this ctask */
- conn->ctask = NULL;
-
- /* process the rest control plane PDUs, if any */
- if (unlikely(__kfifo_len(conn->mgmtqueue))) {
- struct iscsi_session *session = conn->session;
-
- while (__kfifo_get(conn->mgmtqueue, (void*)&conn->mtask,
- sizeof(void*))) {
- if (iscsi_mtask_xmit(conn, conn->mtask))
- goto again;
-
- if (conn->mtask->hdr.itt ==
- cpu_to_be32(ISCSI_RESERVED_TAG)) {
- spin_lock_bh(&session->lock);
- __kfifo_put(session->mgmtpool.queue,
- (void*)&conn->mtask,
- sizeof(void*));
- spin_unlock_bh(&session->lock);
- }
- }
- /* done with this mtask */
- conn->mtask = NULL;
- }
-
- return 0;
-
-again:
- if (unlikely(conn->suspend_tx))
- return 0;
-
- return -EAGAIN;
-}
-
-static void
-iscsi_xmitworker(void *data)
-{
- struct iscsi_conn *conn = data;
-
- /*
- * serialize Xmit worker on a per-connection basis.
- */
- mutex_lock(&conn->xmitmutex);
- if (iscsi_data_xmit(conn))
- scsi_queue_work(conn->session->host, &conn->xmitwork);
- mutex_unlock(&conn->xmitmutex);
-}
-
-#define FAILURE_BAD_HOST 1
-#define FAILURE_SESSION_FAILED 2
-#define FAILURE_SESSION_FREED 3
-#define FAILURE_WINDOW_CLOSED 4
-#define FAILURE_SESSION_TERMINATE 5
-
-static int
-iscsi_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
-{
- struct Scsi_Host *host;
- int reason = 0;
- struct iscsi_session *session;
- struct iscsi_conn *conn = NULL;
- struct iscsi_cmd_task *ctask = NULL;
-
- sc->scsi_done = done;
- sc->result = 0;
-
- host = sc->device->host;
- session = iscsi_hostdata(host->hostdata);
- BUG_ON(host != session->host);
-
- spin_lock(&session->lock);
-
- if (session->state != ISCSI_STATE_LOGGED_IN) {
- if (session->state == ISCSI_STATE_FAILED) {
- reason = FAILURE_SESSION_FAILED;
- goto reject;
- } else if (session->state == ISCSI_STATE_TERMINATE) {
- reason = FAILURE_SESSION_TERMINATE;
- goto fault;
- }
- reason = FAILURE_SESSION_FREED;
- goto fault;
- }
-
- /*
- * Check for iSCSI window and take care of CmdSN wrap-around
- */
- if ((int)(session->max_cmdsn - session->cmdsn) < 0) {
- reason = FAILURE_WINDOW_CLOSED;
- goto reject;
- }
-
- conn = session->leadconn;
-
- __kfifo_get(session->cmdpool.queue, (void*)&ctask, sizeof(void*));
- BUG_ON(ctask->sc);
-
- sc->SCp.phase = session->age;
- sc->SCp.ptr = (char*)ctask;
- iscsi_cmd_init(conn, ctask, sc);
-
- __kfifo_put(conn->xmitqueue, (void*)&ctask, sizeof(void*));
- debug_scsi(
- "ctask enq [%s cid %d sc %lx itt 0x%x len %d cmdsn %d win %d]\n",
- sc->sc_data_direction == DMA_TO_DEVICE ? "write" : "read",
- conn->id, (long)sc, ctask->itt, sc->request_bufflen,
- session->cmdsn, session->max_cmdsn - session->exp_cmdsn + 1);
- spin_unlock(&session->lock);
-
- scsi_queue_work(host, &conn->xmitwork);
- return 0;
-
-reject:
- spin_unlock(&session->lock);
- debug_scsi("cmd 0x%x rejected (%d)\n", sc->cmnd[0], reason);
- return SCSI_MLQUEUE_HOST_BUSY;
-
-fault:
- spin_unlock(&session->lock);
- printk(KERN_ERR "iscsi_tcp: cmd 0x%x is not queued (%d)\n",
- sc->cmnd[0], reason);
- sc->sense_buffer[0] = 0x70;
- sc->sense_buffer[2] = NOT_READY;
- sc->sense_buffer[7] = 0x6;
- sc->sense_buffer[12] = 0x08;
- sc->sense_buffer[13] = 0x00;
- sc->result = (DID_NO_CONNECT << 16);
- sc->resid = sc->request_bufflen;
- sc->scsi_done(sc);
- return 0;
-}
-
-static int
-iscsi_change_queue_depth(struct scsi_device *sdev, int depth)
-{
- if (depth > ISCSI_MAX_CMD_PER_LUN)
- depth = ISCSI_MAX_CMD_PER_LUN;
- scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
- return sdev->queue_depth;
-}
-
-static int
-iscsi_pool_init(struct iscsi_queue *q, int max, void ***items, int item_size)
-{
- int i;
-
- *items = kmalloc(max * sizeof(void*), GFP_KERNEL);
- if (*items == NULL)
- return -ENOMEM;
-
- q->max = max;
- q->pool = kmalloc(max * sizeof(void*), GFP_KERNEL);
- if (q->pool == NULL) {
- kfree(*items);
- return -ENOMEM;
- }
-
- q->queue = kfifo_init((void*)q->pool, max * sizeof(void*),
- GFP_KERNEL, NULL);
- if (q->queue == ERR_PTR(-ENOMEM)) {
- kfree(q->pool);
- kfree(*items);
- return -ENOMEM;
- }
-
- for (i = 0; i < max; i++) {
- q->pool[i] = kmalloc(item_size, GFP_KERNEL);
- if (q->pool[i] == NULL) {
- int j;
-
- for (j = 0; j < i; j++)
- kfree(q->pool[j]);
-
- kfifo_free(q->queue);
- kfree(q->pool);
- kfree(*items);
- return -ENOMEM;
- }
- memset(q->pool[i], 0, item_size);
- (*items)[i] = q->pool[i];
- __kfifo_put(q->queue, (void*)&q->pool[i], sizeof(void*));
- }
- return 0;
-}
-
-static void
-iscsi_pool_free(struct iscsi_queue *q, void **items)
-{
- int i;
-
- for (i = 0; i < q->max; i++)
- kfree(items[i]);
- kfree(q->pool);
- kfree(items);
-}
-
static struct iscsi_cls_conn *
-iscsi_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx)
+iscsi_tcp_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx)
{
- struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
- struct iscsi_session *session = iscsi_hostdata(shost->hostdata);
struct iscsi_conn *conn;
struct iscsi_cls_conn *cls_conn;
+ struct iscsi_tcp_conn *tcp_conn;
- cls_conn = iscsi_create_conn(cls_session, conn_idx);
+ cls_conn = iscsi_conn_setup(cls_session, conn_idx);
if (!cls_conn)
return NULL;
conn = cls_conn->dd_data;
- memset(conn, 0, sizeof(*conn));
-
- conn->cls_conn = cls_conn;
- conn->c_stage = ISCSI_CONN_INITIAL_STAGE;
- conn->in_progress = IN_PROGRESS_WAIT_HEADER;
- conn->id = conn_idx;
- conn->exp_statsn = 0;
- conn->tmabort_state = TMABORT_INITIAL;
-
- /* initial operational parameters */
- conn->hdr_size = sizeof(struct iscsi_hdr);
- conn->data_size = DEFAULT_MAX_RECV_DATA_SEGMENT_LENGTH;
+ /*
+ * due to strange issues with iser these are not set
+ * in iscsi_conn_setup
+ */
conn->max_recv_dlength = DEFAULT_MAX_RECV_DATA_SEGMENT_LENGTH;
- /* initialize general xmit PDU commands queue */
- conn->xmitqueue = kfifo_alloc(session->cmds_max * sizeof(void*),
- GFP_KERNEL, NULL);
- if (conn->xmitqueue == ERR_PTR(-ENOMEM))
- goto xmitqueue_alloc_fail;
+ tcp_conn = kzalloc(sizeof(*tcp_conn), GFP_KERNEL);
+ if (!tcp_conn)
+ goto tcp_conn_alloc_fail;
- /* initialize write response PDU commands queue */
- conn->writequeue = kfifo_alloc(session->cmds_max * sizeof(void*),
- GFP_KERNEL, NULL);
- if (conn->writequeue == ERR_PTR(-ENOMEM))
- goto writequeue_alloc_fail;
-
- /* initialize general immediate & non-immediate PDU commands queue */
- conn->immqueue = kfifo_alloc(session->mgmtpool_max * sizeof(void*),
- GFP_KERNEL, NULL);
- if (conn->immqueue == ERR_PTR(-ENOMEM))
- goto immqueue_alloc_fail;
-
- conn->mgmtqueue = kfifo_alloc(session->mgmtpool_max * sizeof(void*),
- GFP_KERNEL, NULL);
- if (conn->mgmtqueue == ERR_PTR(-ENOMEM))
- goto mgmtqueue_alloc_fail;
-
- INIT_WORK(&conn->xmitwork, iscsi_xmitworker, conn);
-
- /* allocate login_mtask used for the login/text sequences */
- spin_lock_bh(&session->lock);
- if (!__kfifo_get(session->mgmtpool.queue,
- (void*)&conn->login_mtask,
- sizeof(void*))) {
- spin_unlock_bh(&session->lock);
- goto login_mtask_alloc_fail;
- }
- spin_unlock_bh(&session->lock);
+ conn->dd_data = tcp_conn;
+ tcp_conn->iscsi_conn = conn;
+ tcp_conn->in_progress = IN_PROGRESS_WAIT_HEADER;
+ /* initial operational parameters */
+ tcp_conn->hdr_size = sizeof(struct iscsi_hdr);
+ tcp_conn->data_size = DEFAULT_MAX_RECV_DATA_SEGMENT_LENGTH;
/* allocate initial PDU receive place holder */
- if (conn->data_size <= PAGE_SIZE)
- conn->data = kmalloc(conn->data_size, GFP_KERNEL);
+ if (tcp_conn->data_size <= PAGE_SIZE)
+ tcp_conn->data = kmalloc(tcp_conn->data_size, GFP_KERNEL);
else
- conn->data = (void*)__get_free_pages(GFP_KERNEL,
- get_order(conn->data_size));
- if (!conn->data)
+ tcp_conn->data = (void*)__get_free_pages(GFP_KERNEL,
+ get_order(tcp_conn->data_size));
+ if (!tcp_conn->data)
goto max_recv_dlenght_alloc_fail;
- init_timer(&conn->tmabort_timer);
- mutex_init(&conn->xmitmutex);
- init_waitqueue_head(&conn->ehwait);
-
return cls_conn;
max_recv_dlenght_alloc_fail:
- spin_lock_bh(&session->lock);
- __kfifo_put(session->mgmtpool.queue, (void*)&conn->login_mtask,
- sizeof(void*));
- spin_unlock_bh(&session->lock);
-login_mtask_alloc_fail:
- kfifo_free(conn->mgmtqueue);
-mgmtqueue_alloc_fail:
- kfifo_free(conn->immqueue);
-immqueue_alloc_fail:
- kfifo_free(conn->writequeue);
-writequeue_alloc_fail:
- kfifo_free(conn->xmitqueue);
-xmitqueue_alloc_fail:
- iscsi_destroy_conn(cls_conn);
+ kfree(tcp_conn);
+tcp_conn_alloc_fail:
+ iscsi_conn_teardown(cls_conn);
return NULL;
}
static void
-iscsi_conn_destroy(struct iscsi_cls_conn *cls_conn)
+iscsi_tcp_conn_destroy(struct iscsi_cls_conn *cls_conn)
{
struct iscsi_conn *conn = cls_conn->dd_data;
- struct iscsi_session *session = conn->session;
- unsigned long flags;
+ struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
+ int digest = 0;
- mutex_lock(&conn->xmitmutex);
- set_bit(SUSPEND_BIT, &conn->suspend_tx);
- if (conn->c_stage == ISCSI_CONN_INITIAL_STAGE && conn->sock) {
- struct sock *sk = conn->sock->sk;
+ if (conn->hdrdgst_en || conn->datadgst_en)
+ digest = 1;
- /*
- * conn_start() has never been called!
- * need to cleanup the socket.
- */
- write_lock_bh(&sk->sk_callback_lock);
- set_bit(SUSPEND_BIT, &conn->suspend_rx);
- write_unlock_bh(&sk->sk_callback_lock);
+ iscsi_conn_teardown(cls_conn);
- sock_hold(conn->sock->sk);
- iscsi_conn_restore_callbacks(conn);
- sock_put(conn->sock->sk);
- sock_release(conn->sock);
- conn->sock = NULL;
- }
-
- spin_lock_bh(&session->lock);
- conn->c_stage = ISCSI_CONN_CLEANUP_WAIT;
- if (session->leadconn == conn) {
- /*
- * leading connection? then give up on recovery.
- */
- session->state = ISCSI_STATE_TERMINATE;
- wake_up(&conn->ehwait);
- }
- spin_unlock_bh(&session->lock);
-
- mutex_unlock(&conn->xmitmutex);
-
- /*
- * Block until all in-progress commands for this connection
- * time out or fail.
- */
- for (;;) {
- spin_lock_irqsave(session->host->host_lock, flags);
- if (!session->host->host_busy) { /* OK for ERL == 0 */
- spin_unlock_irqrestore(session->host->host_lock, flags);
- break;
- }
- spin_unlock_irqrestore(session->host->host_lock, flags);
- msleep_interruptible(500);
- printk("conn_destroy(): host_busy %d host_failed %d\n",
- session->host->host_busy, session->host->host_failed);
- /*
- * force eh_abort() to unblock
- */
- wake_up(&conn->ehwait);
- }
-
- /* now free crypto */
- if (conn->hdrdgst_en || conn->datadgst_en) {
- if (conn->tx_tfm)
- crypto_free_tfm(conn->tx_tfm);
- if (conn->rx_tfm)
- crypto_free_tfm(conn->rx_tfm);
- if (conn->data_tx_tfm)
- crypto_free_tfm(conn->data_tx_tfm);
- if (conn->data_rx_tfm)
- crypto_free_tfm(conn->data_rx_tfm);
+ /* now free tcp_conn */
+ if (digest) {
+ if (tcp_conn->tx_tfm)
+ crypto_free_tfm(tcp_conn->tx_tfm);
+ if (tcp_conn->rx_tfm)
+ crypto_free_tfm(tcp_conn->rx_tfm);
+ if (tcp_conn->data_tx_tfm)
+ crypto_free_tfm(tcp_conn->data_tx_tfm);
+ if (tcp_conn->data_rx_tfm)
+ crypto_free_tfm(tcp_conn->data_rx_tfm);
}
/* free conn->data, size = MaxRecvDataSegmentLength */
- if (conn->data_size <= PAGE_SIZE)
- kfree(conn->data);
+ if (tcp_conn->data_size <= PAGE_SIZE)
+ kfree(tcp_conn->data);
else
- free_pages((unsigned long)conn->data,
- get_order(conn->data_size));
-
- spin_lock_bh(&session->lock);
- __kfifo_put(session->mgmtpool.queue, (void*)&conn->login_mtask,
- sizeof(void*));
- list_del(&conn->item);
- if (list_empty(&session->connections))
- session->leadconn = NULL;
- if (session->leadconn && session->leadconn == conn)
- session->leadconn = container_of(session->connections.next,
- struct iscsi_conn, item);
-
- if (session->leadconn == NULL)
- /* none connections exits.. reset sequencing */
- session->cmdsn = session->max_cmdsn = session->exp_cmdsn = 1;
- spin_unlock_bh(&session->lock);
-
- kfifo_free(conn->xmitqueue);
- kfifo_free(conn->writequeue);
- kfifo_free(conn->immqueue);
- kfifo_free(conn->mgmtqueue);
-
- iscsi_destroy_conn(cls_conn);
+ free_pages((unsigned long)tcp_conn->data,
+ get_order(tcp_conn->data_size));
+ kfree(tcp_conn);
}
static int
-iscsi_conn_bind(struct iscsi_cls_session *cls_session,
- struct iscsi_cls_conn *cls_conn, uint32_t transport_fd,
- int is_leading)
+iscsi_tcp_conn_bind(struct iscsi_cls_session *cls_session,
+ struct iscsi_cls_conn *cls_conn, uint32_t transport_fd,
+ int is_leading)
{
- struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
- struct iscsi_session *session = iscsi_hostdata(shost->hostdata);
- struct iscsi_conn *tmp = ERR_PTR(-EEXIST), *conn = cls_conn->dd_data;
+ struct iscsi_conn *conn = cls_conn->dd_data;
+ struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
struct sock *sk;
struct socket *sock;
int err;
@@ -2640,32 +1991,13 @@
return -EEXIST;
}
- /* lookup for existing connection */
- spin_lock_bh(&session->lock);
- list_for_each_entry(tmp, &session->connections, item) {
- if (tmp == conn) {
- if (conn->c_stage != ISCSI_CONN_STOPPED ||
- conn->stop_stage == STOP_CONN_TERM) {
- printk(KERN_ERR "iscsi_tcp: can't bind "
- "non-stopped connection (%d:%d)\n",
- conn->c_stage, conn->stop_stage);
- spin_unlock_bh(&session->lock);
- return -EIO;
- }
- break;
- }
- }
- if (tmp != conn) {
- /* bind new iSCSI connection to session */
- conn->session = session;
-
- list_add(&conn->item, &session->connections);
- }
- spin_unlock_bh(&session->lock);
+ err = iscsi_conn_bind(cls_session, cls_conn, is_leading);
+ if (err)
+ return err;
if (conn->stop_stage != STOP_CONN_SUSPEND) {
/* bind iSCSI connection and socket */
- conn->sock = sock;
+ tcp_conn->sock = sock;
/* setup Socket parameters */
sk = sock->sk;
@@ -2679,488 +2011,78 @@
* Intercept TCP callbacks for sendfile like receive
* processing.
*/
+ conn->recv_lock = &sk->sk_callback_lock;
iscsi_conn_set_callbacks(conn);
-
- conn->sendpage = conn->sock->ops->sendpage;
-
+ tcp_conn->sendpage = tcp_conn->sock->ops->sendpage;
/*
* set receive state machine into initial state
*/
- conn->in_progress = IN_PROGRESS_WAIT_HEADER;
+ tcp_conn->in_progress = IN_PROGRESS_WAIT_HEADER;
}
- if (is_leading)
- session->leadconn = conn;
-
- /*
- * Unblock xmitworker(), Login Phase will pass through.
- */
- clear_bit(SUSPEND_BIT, &conn->suspend_rx);
- clear_bit(SUSPEND_BIT, &conn->suspend_tx);
-
- return 0;
-}
-
-static int
-iscsi_conn_start(struct iscsi_cls_conn *cls_conn)
-{
- struct iscsi_conn *conn = cls_conn->dd_data;
- struct iscsi_session *session = conn->session;
- struct sock *sk;
-
- /* FF phase warming up... */
-
- if (session == NULL) {
- printk(KERN_ERR "iscsi_tcp: can't start unbound connection\n");
- return -EPERM;
- }
-
- sk = conn->sock->sk;
-
- write_lock_bh(&sk->sk_callback_lock);
- spin_lock_bh(&session->lock);
- conn->c_stage = ISCSI_CONN_STARTED;
- session->state = ISCSI_STATE_LOGGED_IN;
-
- switch(conn->stop_stage) {
- case STOP_CONN_RECOVER:
- /*
- * unblock eh_abort() if it is blocked. re-try all
- * commands after successful recovery
- */
- session->conn_cnt++;
- conn->stop_stage = 0;
- conn->tmabort_state = TMABORT_INITIAL;
- session->age++;
- wake_up(&conn->ehwait);
- break;
- case STOP_CONN_TERM:
- session->conn_cnt++;
- conn->stop_stage = 0;
- break;
- case STOP_CONN_SUSPEND:
- conn->stop_stage = 0;
- clear_bit(SUSPEND_BIT, &conn->suspend_rx);
- clear_bit(SUSPEND_BIT, &conn->suspend_tx);
- break;
- default:
- break;
- }
- spin_unlock_bh(&session->lock);
- write_unlock_bh(&sk->sk_callback_lock);
-
return 0;
}
static void
-iscsi_conn_stop(struct iscsi_cls_conn *cls_conn, int flag)
+iscsi_tcp_cleanup_ctask(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
{
- struct iscsi_conn *conn = cls_conn->dd_data;
- struct iscsi_session *session = conn->session;
- struct sock *sk;
- unsigned long flags;
+ struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
+ struct iscsi_r2t_info *r2t;
- BUG_ON(!conn->sock);
- sk = conn->sock->sk;
- write_lock_bh(&sk->sk_callback_lock);
- set_bit(SUSPEND_BIT, &conn->suspend_rx);
- write_unlock_bh(&sk->sk_callback_lock);
+ /* flush ctask's r2t queues */
+ while (__kfifo_get(tcp_ctask->r2tqueue, (void*)&r2t, sizeof(void*)))
+ __kfifo_put(tcp_ctask->r2tpool.queue, (void*)&r2t,
+ sizeof(void*));
- mutex_lock(&conn->xmitmutex);
-
- spin_lock_irqsave(session->host->host_lock, flags);
- spin_lock(&session->lock);
- conn->stop_stage = flag;
- conn->c_stage = ISCSI_CONN_STOPPED;
- set_bit(SUSPEND_BIT, &conn->suspend_tx);
-
- if (flag != STOP_CONN_SUSPEND)
- session->conn_cnt--;
-
- if (session->conn_cnt == 0 || session->leadconn == conn)
- session->state = ISCSI_STATE_FAILED;
-
- spin_unlock(&session->lock);
- spin_unlock_irqrestore(session->host->host_lock, flags);
-
- if (flag == STOP_CONN_TERM || flag == STOP_CONN_RECOVER) {
- struct iscsi_cmd_task *ctask;
- struct iscsi_mgmt_task *mtask;
-
- /*
- * Socket must go now.
- */
- sock_hold(conn->sock->sk);
- iscsi_conn_restore_callbacks(conn);
- sock_put(conn->sock->sk);
-
- /*
- * flush xmit queues.
- */
- spin_lock_bh(&session->lock);
- while (__kfifo_get(conn->writequeue, (void*)&ctask,
- sizeof(void*)) ||
- __kfifo_get(conn->xmitqueue, (void*)&ctask,
- sizeof(void*))) {
- struct iscsi_r2t_info *r2t;
-
- /*
- * flush ctask's r2t queues
- */
- while (__kfifo_get(ctask->r2tqueue, (void*)&r2t,
- sizeof(void*)))
- __kfifo_put(ctask->r2tpool.queue, (void*)&r2t,
- sizeof(void*));
-
- spin_unlock_bh(&session->lock);
- local_bh_disable();
- iscsi_ctask_cleanup(conn, ctask);
- local_bh_enable();
- spin_lock_bh(&session->lock);
- }
- conn->ctask = NULL;
- while (__kfifo_get(conn->immqueue, (void*)&mtask,
- sizeof(void*)) ||
- __kfifo_get(conn->mgmtqueue, (void*)&mtask,
- sizeof(void*))) {
- __kfifo_put(session->mgmtpool.queue,
- (void*)&mtask, sizeof(void*));
- }
- conn->mtask = NULL;
- spin_unlock_bh(&session->lock);
-
- /*
- * release socket only after we stopped data_xmit()
- * activity and flushed all outstandings
- */
- sock_release(conn->sock);
- conn->sock = NULL;
-
- /*
- * for connection level recovery we should not calculate
- * header digest. conn->hdr_size used for optimization
- * in hdr_extract() and will be re-negotiated at
- * set_param() time.
- */
- if (flag == STOP_CONN_RECOVER) {
- conn->hdr_size = sizeof(struct iscsi_hdr);
- conn->hdrdgst_en = 0;
- conn->datadgst_en = 0;
- }
- }
- mutex_unlock(&conn->xmitmutex);
+ __iscsi_ctask_cleanup(conn, ctask);
}
-static int
-iscsi_conn_send_generic(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
- char *data, uint32_t data_size)
+static void
+iscsi_tcp_suspend_conn_rx(struct iscsi_conn *conn)
{
- struct iscsi_session *session = conn->session;
- struct iscsi_nopout *nop = (struct iscsi_nopout *)hdr;
- struct iscsi_mgmt_task *mtask;
+ struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
+ struct sock *sk;
- spin_lock_bh(&session->lock);
- if (session->state == ISCSI_STATE_TERMINATE) {
- spin_unlock_bh(&session->lock);
- return -EPERM;
- }
- if (hdr->opcode == (ISCSI_OP_LOGIN | ISCSI_OP_IMMEDIATE) ||
- hdr->opcode == (ISCSI_OP_TEXT | ISCSI_OP_IMMEDIATE))
- /*
- * Login and Text are sent serially, in
- * request-followed-by-response sequence.
- * Same mtask can be used. Same ITT must be used.
- * Note that login_mtask is preallocated at conn_create().
- */
- mtask = conn->login_mtask;
- else {
- BUG_ON(conn->c_stage == ISCSI_CONN_INITIAL_STAGE);
- BUG_ON(conn->c_stage == ISCSI_CONN_STOPPED);
+ if (!tcp_conn->sock)
+ return;
- if (!__kfifo_get(session->mgmtpool.queue,
- (void*)&mtask, sizeof(void*))) {
- spin_unlock_bh(&session->lock);
- return -ENOSPC;
- }
- }
+ sk = tcp_conn->sock->sk;
+ write_lock_bh(&sk->sk_callback_lock);
+ set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx);
+ write_unlock_bh(&sk->sk_callback_lock);
+}
- /*
- * pre-format CmdSN and ExpStatSN for outgoing PDU.
- */
- if (hdr->itt != cpu_to_be32(ISCSI_RESERVED_TAG)) {
- hdr->itt = mtask->itt | (conn->id << CID_SHIFT) |
- (session->age << AGE_SHIFT);
- nop->cmdsn = cpu_to_be32(session->cmdsn);
- if (conn->c_stage == ISCSI_CONN_STARTED &&
- !(hdr->opcode & ISCSI_OP_IMMEDIATE))
- session->cmdsn++;
- } else
- /* do not advance CmdSN */
- nop->cmdsn = cpu_to_be32(session->cmdsn);
+static void
+iscsi_tcp_terminate_conn(struct iscsi_conn *conn)
+{
+ struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
- nop->exp_statsn = cpu_to_be32(conn->exp_statsn);
+ if (!tcp_conn->sock)
+ return;
- memcpy(&mtask->hdr, hdr, sizeof(struct iscsi_hdr));
+ sock_hold(tcp_conn->sock->sk);
+ iscsi_conn_restore_callbacks(conn);
+ sock_put(tcp_conn->sock->sk);
- iscsi_buf_init_virt(&mtask->headbuf, (char*)&mtask->hdr,
+ sock_release(tcp_conn->sock);
+ tcp_conn->sock = NULL;
+ conn->recv_lock = NULL;
+}
+
+/* called with host lock */
+static void
+iscsi_tcp_mgmt_init(struct iscsi_conn *conn, struct iscsi_mgmt_task *mtask,
+ char *data, uint32_t data_size)
+{
+ struct iscsi_tcp_mgmt_task *tcp_mtask = mtask->dd_data;
+
+ iscsi_buf_init_virt(&tcp_mtask->headbuf, (char*)mtask->hdr,
sizeof(struct iscsi_hdr));
+ tcp_mtask->xmstate = XMSTATE_IMM_HDR;
- spin_unlock_bh(&session->lock);
-
- if (data_size) {
- memcpy(mtask->data, data, data_size);
- mtask->data_count = data_size;
- } else
- mtask->data_count = 0;
-
- mtask->xmstate = XMSTATE_IMM_HDR;
-
- if (mtask->data_count) {
- iscsi_buf_init_iov(&mtask->sendbuf, (char*)mtask->data,
+ if (mtask->data_count)
+ iscsi_buf_init_iov(&tcp_mtask->sendbuf, (char*)mtask->data,
mtask->data_count);
- }
-
- debug_scsi("mgmtpdu [op 0x%x hdr->itt 0x%x datalen %d]\n",
- hdr->opcode, hdr->itt, data_size);
-
- /*
- * since send_pdu() could be called at least from two contexts,
- * we need to serialize __kfifo_put, so we don't have to take
- * additional lock on fast data-path
- */
- if (hdr->opcode & ISCSI_OP_IMMEDIATE)
- __kfifo_put(conn->immqueue, (void*)&mtask, sizeof(void*));
- else
- __kfifo_put(conn->mgmtqueue, (void*)&mtask, sizeof(void*));
-
- scsi_queue_work(session->host, &conn->xmitwork);
- return 0;
-}
-
-static int
-iscsi_eh_host_reset(struct scsi_cmnd *sc)
-{
- struct iscsi_cmd_task *ctask = (struct iscsi_cmd_task *)sc->SCp.ptr;
- struct iscsi_conn *conn = ctask->conn;
- struct iscsi_session *session = conn->session;
-
- spin_lock_bh(&session->lock);
- if (session->state == ISCSI_STATE_TERMINATE) {
- debug_scsi("failing host reset: session terminated "
- "[CID %d age %d]", conn->id, session->age);
- spin_unlock_bh(&session->lock);
- return FAILED;
- }
- spin_unlock_bh(&session->lock);
-
- debug_scsi("failing connection CID %d due to SCSI host reset "
- "[itt 0x%x age %d]", conn->id, ctask->itt,
- session->age);
- iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
-
- return SUCCESS;
-}
-
-static void
-iscsi_tmabort_timedout(unsigned long data)
-{
- struct iscsi_cmd_task *ctask = (struct iscsi_cmd_task *)data;
- struct iscsi_conn *conn = ctask->conn;
- struct iscsi_session *session = conn->session;
-
- spin_lock(&session->lock);
- if (conn->tmabort_state == TMABORT_INITIAL) {
- __kfifo_put(session->mgmtpool.queue,
- (void*)&ctask->mtask, sizeof(void*));
- conn->tmabort_state = TMABORT_TIMEDOUT;
- debug_scsi("tmabort timedout [sc %lx itt 0x%x]\n",
- (long)ctask->sc, ctask->itt);
- /* unblock eh_abort() */
- wake_up(&conn->ehwait);
- }
- spin_unlock(&session->lock);
-}
-
-static int
-iscsi_eh_abort(struct scsi_cmnd *sc)
-{
- int rc;
- struct iscsi_cmd_task *ctask = (struct iscsi_cmd_task *)sc->SCp.ptr;
- struct iscsi_conn *conn = ctask->conn;
- struct iscsi_session *session = conn->session;
-
- conn->eh_abort_cnt++;
- debug_scsi("aborting [sc %lx itt 0x%x]\n", (long)sc, ctask->itt);
-
- /*
- * two cases for ERL=0 here:
- *
- * 1) connection-level failure;
- * 2) recovery due protocol error;
- */
- mutex_lock(&conn->xmitmutex);
- spin_lock_bh(&session->lock);
- if (session->state != ISCSI_STATE_LOGGED_IN) {
- if (session->state == ISCSI_STATE_TERMINATE) {
- spin_unlock_bh(&session->lock);
- mutex_unlock(&conn->xmitmutex);
- goto failed;
- }
- spin_unlock_bh(&session->lock);
- } else {
- struct iscsi_tm *hdr = &conn->tmhdr;
-
- /*
- * Still LOGGED_IN...
- */
-
- if (!ctask->sc || sc->SCp.phase != session->age) {
- /*
- * 1) ctask completed before time out. But session
- * is still ok => Happy Retry.
- * 2) session was re-open during time out of ctask.
- */
- spin_unlock_bh(&session->lock);
- mutex_unlock(&conn->xmitmutex);
- goto success;
- }
- conn->tmabort_state = TMABORT_INITIAL;
- spin_unlock_bh(&session->lock);
-
- /*
- * ctask timed out but session is OK
- * ERL=0 requires task mgmt abort to be issued on each
- * failed command. requests must be serialized.
- */
- memset(hdr, 0, sizeof(struct iscsi_tm));
- hdr->opcode = ISCSI_OP_SCSI_TMFUNC | ISCSI_OP_IMMEDIATE;
- hdr->flags = ISCSI_TM_FUNC_ABORT_TASK;
- hdr->flags |= ISCSI_FLAG_CMD_FINAL;
- memcpy(hdr->lun, ctask->hdr.lun, sizeof(hdr->lun));
- hdr->rtt = ctask->hdr.itt;
- hdr->refcmdsn = ctask->hdr.cmdsn;
-
- rc = iscsi_conn_send_generic(conn, (struct iscsi_hdr *)hdr,
- NULL, 0);
- if (rc) {
- iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
- debug_scsi("abort sent failure [itt 0x%x]", ctask->itt);
- } else {
- struct iscsi_r2t_info *r2t;
-
- /*
- * TMF abort vs. TMF response race logic
- */
- spin_lock_bh(&session->lock);
- ctask->mtask = (struct iscsi_mgmt_task *)
- session->mgmt_cmds[(hdr->itt & ITT_MASK) -
- ISCSI_MGMT_ITT_OFFSET];
- /*
- * have to flush r2tqueue to avoid r2t leaks
- */
- while (__kfifo_get(ctask->r2tqueue, (void*)&r2t,
- sizeof(void*))) {
- __kfifo_put(ctask->r2tpool.queue, (void*)&r2t,
- sizeof(void*));
- }
- if (conn->tmabort_state == TMABORT_INITIAL) {
- conn->tmfcmd_pdus_cnt++;
- conn->tmabort_timer.expires = 3*HZ + jiffies;
- conn->tmabort_timer.function =
- iscsi_tmabort_timedout;
- conn->tmabort_timer.data = (unsigned long)ctask;
- add_timer(&conn->tmabort_timer);
- debug_scsi("abort sent [itt 0x%x]", ctask->itt);
- } else {
- if (!ctask->sc ||
- conn->tmabort_state == TMABORT_SUCCESS) {
- conn->tmabort_state = TMABORT_INITIAL;
- spin_unlock_bh(&session->lock);
- mutex_unlock(&conn->xmitmutex);
- goto success;
- }
- conn->tmabort_state = TMABORT_INITIAL;
- iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
- }
- spin_unlock_bh(&session->lock);
- }
- }
- mutex_unlock(&conn->xmitmutex);
-
-
- /*
- * block eh thread until:
- *
- * 1) abort response;
- * 2) abort timeout;
- * 3) session re-opened;
- * 4) session terminated;
- */
- for (;;) {
- int p_state = session->state;
-
- rc = wait_event_interruptible(conn->ehwait,
- (p_state == ISCSI_STATE_LOGGED_IN ?
- (session->state == ISCSI_STATE_TERMINATE ||
- conn->tmabort_state != TMABORT_INITIAL) :
- (session->state == ISCSI_STATE_TERMINATE ||
- session->state == ISCSI_STATE_LOGGED_IN)));
- if (rc) {
- /* shutdown.. */
- session->state = ISCSI_STATE_TERMINATE;
- goto failed;
- }
-
- if (signal_pending(current))
- flush_signals(current);
-
- if (session->state == ISCSI_STATE_TERMINATE)
- goto failed;
-
- spin_lock_bh(&session->lock);
- if (sc->SCp.phase == session->age &&
- (conn->tmabort_state == TMABORT_TIMEDOUT ||
- conn->tmabort_state == TMABORT_FAILED)) {
- conn->tmabort_state = TMABORT_INITIAL;
- if (!ctask->sc) {
- /*
- * ctask completed before tmf abort response or
- * time out.
- * But session is still ok => Happy Retry.
- */
- spin_unlock_bh(&session->lock);
- break;
- }
- spin_unlock_bh(&session->lock);
- iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
- continue;
- }
- spin_unlock_bh(&session->lock);
- break;
- }
-
-success:
- debug_scsi("abort success [sc %lx itt 0x%x]\n", (long)sc, ctask->itt);
- rc = SUCCESS;
- goto exit;
-
-failed:
- debug_scsi("abort failed [sc %lx itt 0x%x]\n", (long)sc, ctask->itt);
- rc = FAILED;
-
-exit:
- del_timer_sync(&conn->tmabort_timer);
-
- mutex_lock(&conn->xmitmutex);
- if (conn->sock) {
- struct sock *sk = conn->sock->sk;
-
- write_lock_bh(&sk->sk_callback_lock);
- iscsi_ctask_cleanup(conn, ctask);
- write_unlock_bh(&sk->sk_callback_lock);
- }
- mutex_unlock(&conn->xmitmutex);
- return rc;
}
static int
@@ -3174,6 +2096,7 @@
*/
for (cmd_i = 0; cmd_i < session->cmds_max; cmd_i++) {
struct iscsi_cmd_task *ctask = session->cmds[cmd_i];
+ struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
/*
* pre-allocated x4 as much r2ts to handle race when
@@ -3182,16 +2105,18 @@
*/
/* R2T pool */
- if (iscsi_pool_init(&ctask->r2tpool, session->max_r2t * 4,
- (void***)&ctask->r2ts, sizeof(struct iscsi_r2t_info))) {
+ if (iscsi_pool_init(&tcp_ctask->r2tpool, session->max_r2t * 4,
+ (void***)&tcp_ctask->r2ts,
+ sizeof(struct iscsi_r2t_info))) {
goto r2t_alloc_fail;
}
/* R2T xmit queue */
- ctask->r2tqueue = kfifo_alloc(
+ tcp_ctask->r2tqueue = kfifo_alloc(
session->max_r2t * 4 * sizeof(void*), GFP_KERNEL, NULL);
- if (ctask->r2tqueue == ERR_PTR(-ENOMEM)) {
- iscsi_pool_free(&ctask->r2tpool, (void**)ctask->r2ts);
+ if (tcp_ctask->r2tqueue == ERR_PTR(-ENOMEM)) {
+ iscsi_pool_free(&tcp_ctask->r2tpool,
+ (void**)tcp_ctask->r2ts);
goto r2t_alloc_fail;
}
@@ -3200,24 +2125,28 @@
* Data-Out PDU's within R2T-sequence can be quite big;
* using mempool
*/
- ctask->datapool = mempool_create_slab_pool(ISCSI_DTASK_DEFAULT_MAX,
- taskcache);
- if (ctask->datapool == NULL) {
- kfifo_free(ctask->r2tqueue);
- iscsi_pool_free(&ctask->r2tpool, (void**)ctask->r2ts);
+ tcp_ctask->datapool = mempool_create_slab_pool(ISCSI_DTASK_DEFAULT_MAX,
+ taskcache);
+ if (tcp_ctask->datapool == NULL) {
+ kfifo_free(tcp_ctask->r2tqueue);
+ iscsi_pool_free(&tcp_ctask->r2tpool,
+ (void**)tcp_ctask->r2ts);
goto r2t_alloc_fail;
}
- INIT_LIST_HEAD(&ctask->dataqueue);
+ INIT_LIST_HEAD(&tcp_ctask->dataqueue);
}
return 0;
r2t_alloc_fail:
for (i = 0; i < cmd_i; i++) {
- mempool_destroy(session->cmds[i]->datapool);
- kfifo_free(session->cmds[i]->r2tqueue);
- iscsi_pool_free(&session->cmds[i]->r2tpool,
- (void**)session->cmds[i]->r2ts);
+ struct iscsi_cmd_task *ctask = session->cmds[i];
+ struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
+
+ mempool_destroy(tcp_ctask->datapool);
+ kfifo_free(tcp_ctask->r2tqueue);
+ iscsi_pool_free(&tcp_ctask->r2tpool,
+ (void**)tcp_ctask->r2ts);
}
return -ENOMEM;
}
@@ -3228,152 +2157,30 @@
int i;
for (i = 0; i < session->cmds_max; i++) {
- mempool_destroy(session->cmds[i]->datapool);
- kfifo_free(session->cmds[i]->r2tqueue);
- iscsi_pool_free(&session->cmds[i]->r2tpool,
- (void**)session->cmds[i]->r2ts);
+ struct iscsi_cmd_task *ctask = session->cmds[i];
+ struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
+
+ mempool_destroy(tcp_ctask->datapool);
+ kfifo_free(tcp_ctask->r2tqueue);
+ iscsi_pool_free(&tcp_ctask->r2tpool,
+ (void**)tcp_ctask->r2ts);
}
}
-static struct scsi_host_template iscsi_sht = {
- .name = "iSCSI Initiator over TCP/IP, v."
- ISCSI_VERSION_STR,
- .queuecommand = iscsi_queuecommand,
- .change_queue_depth = iscsi_change_queue_depth,
- .can_queue = ISCSI_XMIT_CMDS_MAX - 1,
- .sg_tablesize = ISCSI_SG_TABLESIZE,
- .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,
- .eh_abort_handler = iscsi_eh_abort,
- .eh_host_reset_handler = iscsi_eh_host_reset,
- .use_clustering = DISABLE_CLUSTERING,
- .proc_name = "iscsi_tcp",
- .this_id = -1,
-};
-
-static struct iscsi_transport iscsi_tcp_transport;
-
-static struct iscsi_cls_session *
-iscsi_session_create(struct scsi_transport_template *scsit,
- uint32_t initial_cmdsn, uint32_t *sid)
-{
- struct Scsi_Host *shost;
- struct iscsi_session *session;
- int cmd_i;
-
- shost = iscsi_transport_create_session(scsit, &iscsi_tcp_transport);
- if (!shost)
- return NULL;
-
- session = iscsi_hostdata(shost->hostdata);
- memset(session, 0, sizeof(struct iscsi_session));
- session->host = shost;
- session->state = ISCSI_STATE_FREE;
- session->mgmtpool_max = ISCSI_MGMT_CMDS_MAX;
- session->cmds_max = ISCSI_XMIT_CMDS_MAX;
- session->cmdsn = initial_cmdsn;
- session->exp_cmdsn = initial_cmdsn + 1;
- session->max_cmdsn = initial_cmdsn + 1;
- session->max_r2t = 1;
- *sid = shost->host_no;
-
- /* initialize SCSI PDU commands pool */
- if (iscsi_pool_init(&session->cmdpool, session->cmds_max,
- (void***)&session->cmds, sizeof(struct iscsi_cmd_task)))
- goto cmdpool_alloc_fail;
-
- /* pre-format cmds pool with ITT */
- for (cmd_i = 0; cmd_i < session->cmds_max; cmd_i++)
- session->cmds[cmd_i]->itt = cmd_i;
-
- spin_lock_init(&session->lock);
- INIT_LIST_HEAD(&session->connections);
-
- /* initialize immediate command pool */
- if (iscsi_pool_init(&session->mgmtpool, session->mgmtpool_max,
- (void***)&session->mgmt_cmds, sizeof(struct iscsi_mgmt_task)))
- goto mgmtpool_alloc_fail;
-
-
- /* pre-format immediate cmds pool with ITT */
- for (cmd_i = 0; cmd_i < session->mgmtpool_max; cmd_i++) {
- session->mgmt_cmds[cmd_i]->itt = ISCSI_MGMT_ITT_OFFSET + cmd_i;
- session->mgmt_cmds[cmd_i]->data = kmalloc(
- DEFAULT_MAX_RECV_DATA_SEGMENT_LENGTH, GFP_KERNEL);
- if (!session->mgmt_cmds[cmd_i]->data) {
- int j;
-
- for (j = 0; j < cmd_i; j++)
- kfree(session->mgmt_cmds[j]->data);
- goto immdata_alloc_fail;
- }
- }
-
- if (iscsi_r2tpool_alloc(session))
- goto r2tpool_alloc_fail;
-
- return hostdata_session(shost->hostdata);
-
-r2tpool_alloc_fail:
- for (cmd_i = 0; cmd_i < session->mgmtpool_max; cmd_i++)
- kfree(session->mgmt_cmds[cmd_i]->data);
-immdata_alloc_fail:
- iscsi_pool_free(&session->mgmtpool, (void**)session->mgmt_cmds);
-mgmtpool_alloc_fail:
- iscsi_pool_free(&session->cmdpool, (void**)session->cmds);
-cmdpool_alloc_fail:
- iscsi_transport_destroy_session(shost);
- return NULL;
-}
-
-static void
-iscsi_session_destroy(struct iscsi_cls_session *cls_session)
-{
- struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
- struct iscsi_session *session = iscsi_hostdata(shost->hostdata);
- int cmd_i;
- struct iscsi_data_task *dtask, *n;
-
- for (cmd_i = 0; cmd_i < session->cmds_max; cmd_i++) {
- struct iscsi_cmd_task *ctask = session->cmds[cmd_i];
- list_for_each_entry_safe(dtask, n, &ctask->dataqueue, item) {
- list_del(&dtask->item);
- mempool_free(dtask, ctask->datapool);
- }
- }
-
- for (cmd_i = 0; cmd_i < session->mgmtpool_max; cmd_i++)
- kfree(session->mgmt_cmds[cmd_i]->data);
-
- iscsi_r2tpool_free(session);
- iscsi_pool_free(&session->mgmtpool, (void**)session->mgmt_cmds);
- iscsi_pool_free(&session->cmdpool, (void**)session->cmds);
-
- iscsi_transport_destroy_session(shost);
-}
-
static int
iscsi_conn_set_param(struct iscsi_cls_conn *cls_conn, enum iscsi_param param,
uint32_t value)
{
struct iscsi_conn *conn = cls_conn->dd_data;
struct iscsi_session *session = conn->session;
-
- spin_lock_bh(&session->lock);
- if (conn->c_stage != ISCSI_CONN_INITIAL_STAGE &&
- conn->stop_stage != STOP_CONN_RECOVER) {
- printk(KERN_ERR "iscsi_tcp: can not change parameter [%d]\n",
- param);
- spin_unlock_bh(&session->lock);
- return 0;
- }
- spin_unlock_bh(&session->lock);
+ struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
switch(param) {
case ISCSI_PARAM_MAX_RECV_DLENGTH: {
- char *saveptr = conn->data;
+ char *saveptr = tcp_conn->data;
gfp_t flags = GFP_KERNEL;
- if (conn->data_size >= value) {
+ if (tcp_conn->data_size >= value) {
conn->max_recv_dlength = value;
break;
}
@@ -3384,21 +2191,21 @@
spin_unlock_bh(&session->lock);
if (value <= PAGE_SIZE)
- conn->data = kmalloc(value, flags);
+ tcp_conn->data = kmalloc(value, flags);
else
- conn->data = (void*)__get_free_pages(flags,
+ tcp_conn->data = (void*)__get_free_pages(flags,
get_order(value));
- if (conn->data == NULL) {
- conn->data = saveptr;
+ if (tcp_conn->data == NULL) {
+ tcp_conn->data = saveptr;
return -ENOMEM;
}
- if (conn->data_size <= PAGE_SIZE)
+ if (tcp_conn->data_size <= PAGE_SIZE)
kfree(saveptr);
else
free_pages((unsigned long)saveptr,
- get_order(conn->data_size));
+ get_order(tcp_conn->data_size));
conn->max_recv_dlength = value;
- conn->data_size = value;
+ tcp_conn->data_size = value;
}
break;
case ISCSI_PARAM_MAX_XMIT_DLENGTH:
@@ -3406,49 +2213,51 @@
break;
case ISCSI_PARAM_HDRDGST_EN:
conn->hdrdgst_en = value;
- conn->hdr_size = sizeof(struct iscsi_hdr);
+ tcp_conn->hdr_size = sizeof(struct iscsi_hdr);
if (conn->hdrdgst_en) {
- conn->hdr_size += sizeof(__u32);
- if (!conn->tx_tfm)
- conn->tx_tfm = crypto_alloc_tfm("crc32c", 0);
- if (!conn->tx_tfm)
+ tcp_conn->hdr_size += sizeof(__u32);
+ if (!tcp_conn->tx_tfm)
+ tcp_conn->tx_tfm = crypto_alloc_tfm("crc32c",
+ 0);
+ if (!tcp_conn->tx_tfm)
return -ENOMEM;
- if (!conn->rx_tfm)
- conn->rx_tfm = crypto_alloc_tfm("crc32c", 0);
- if (!conn->rx_tfm) {
- crypto_free_tfm(conn->tx_tfm);
+ if (!tcp_conn->rx_tfm)
+ tcp_conn->rx_tfm = crypto_alloc_tfm("crc32c",
+ 0);
+ if (!tcp_conn->rx_tfm) {
+ crypto_free_tfm(tcp_conn->tx_tfm);
return -ENOMEM;
}
} else {
- if (conn->tx_tfm)
- crypto_free_tfm(conn->tx_tfm);
- if (conn->rx_tfm)
- crypto_free_tfm(conn->rx_tfm);
+ if (tcp_conn->tx_tfm)
+ crypto_free_tfm(tcp_conn->tx_tfm);
+ if (tcp_conn->rx_tfm)
+ crypto_free_tfm(tcp_conn->rx_tfm);
}
break;
case ISCSI_PARAM_DATADGST_EN:
conn->datadgst_en = value;
if (conn->datadgst_en) {
- if (!conn->data_tx_tfm)
- conn->data_tx_tfm =
+ if (!tcp_conn->data_tx_tfm)
+ tcp_conn->data_tx_tfm =
crypto_alloc_tfm("crc32c", 0);
- if (!conn->data_tx_tfm)
+ if (!tcp_conn->data_tx_tfm)
return -ENOMEM;
- if (!conn->data_rx_tfm)
- conn->data_rx_tfm =
+ if (!tcp_conn->data_rx_tfm)
+ tcp_conn->data_rx_tfm =
crypto_alloc_tfm("crc32c", 0);
- if (!conn->data_rx_tfm) {
- crypto_free_tfm(conn->data_tx_tfm);
+ if (!tcp_conn->data_rx_tfm) {
+ crypto_free_tfm(tcp_conn->data_tx_tfm);
return -ENOMEM;
}
} else {
- if (conn->data_tx_tfm)
- crypto_free_tfm(conn->data_tx_tfm);
- if (conn->data_rx_tfm)
- crypto_free_tfm(conn->data_rx_tfm);
+ if (tcp_conn->data_tx_tfm)
+ crypto_free_tfm(tcp_conn->data_tx_tfm);
+ if (tcp_conn->data_rx_tfm)
+ crypto_free_tfm(tcp_conn->data_rx_tfm);
}
- conn->sendpage = conn->datadgst_en ?
- sock_no_sendpage : conn->sock->ops->sendpage;
+ tcp_conn->sendpage = conn->datadgst_en ?
+ sock_no_sendpage : tcp_conn->sock->ops->sendpage;
break;
case ISCSI_PARAM_INITIAL_R2T_EN:
session->initial_r2t_en = value;
@@ -3535,7 +2344,7 @@
*value = session->ofmarker_en;
break;
default:
- return ISCSI_ERR_PARAM_NOT_FOUND;
+ return -EINVAL;
}
return 0;
@@ -3546,6 +2355,8 @@
enum iscsi_param param, uint32_t *value)
{
struct iscsi_conn *conn = cls_conn->dd_data;
+ struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
+ struct inet_sock *inet;
switch(param) {
case ISCSI_PARAM_MAX_RECV_DLENGTH:
@@ -3560,17 +2371,67 @@
case ISCSI_PARAM_DATADGST_EN:
*value = conn->datadgst_en;
break;
+ case ISCSI_PARAM_CONN_PORT:
+ mutex_lock(&conn->xmitmutex);
+ if (!tcp_conn->sock) {
+ mutex_unlock(&conn->xmitmutex);
+ return -EINVAL;
+ }
+
+ inet = inet_sk(tcp_conn->sock->sk);
+ *value = be16_to_cpu(inet->dport);
+ mutex_unlock(&conn->xmitmutex);
default:
- return ISCSI_ERR_PARAM_NOT_FOUND;
+ return -EINVAL;
}
return 0;
}
+static int
+iscsi_conn_get_str_param(struct iscsi_cls_conn *cls_conn,
+ enum iscsi_param param, char *buf)
+{
+ struct iscsi_conn *conn = cls_conn->dd_data;
+ struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
+ struct sock *sk;
+ struct inet_sock *inet;
+ struct ipv6_pinfo *np;
+ int len = 0;
+
+ switch (param) {
+ case ISCSI_PARAM_CONN_ADDRESS:
+ mutex_lock(&conn->xmitmutex);
+ if (!tcp_conn->sock) {
+ mutex_unlock(&conn->xmitmutex);
+ return -EINVAL;
+ }
+
+ sk = tcp_conn->sock->sk;
+ if (sk->sk_family == PF_INET) {
+ inet = inet_sk(sk);
+ len = sprintf(buf, "%u.%u.%u.%u\n",
+ NIPQUAD(inet->daddr));
+ } else {
+ np = inet6_sk(sk);
+ len = sprintf(buf,
+ "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",
+ NIP6(np->daddr));
+ }
+ mutex_unlock(&conn->xmitmutex);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return len;
+}
+
static void
iscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn, struct iscsi_stats *stats)
{
struct iscsi_conn *conn = cls_conn->dd_data;
+ struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
stats->txdata_octets = conn->txdata_octets;
stats->rxdata_octets = conn->rxdata_octets;
@@ -3583,49 +2444,141 @@
stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
stats->custom_length = 3;
strcpy(stats->custom[0].desc, "tx_sendpage_failures");
- stats->custom[0].value = conn->sendpage_failures_cnt;
+ stats->custom[0].value = tcp_conn->sendpage_failures_cnt;
strcpy(stats->custom[1].desc, "rx_discontiguous_hdr");
- stats->custom[1].value = conn->discontiguous_hdr_cnt;
+ stats->custom[1].value = tcp_conn->discontiguous_hdr_cnt;
strcpy(stats->custom[2].desc, "eh_abort_cnt");
stats->custom[2].value = conn->eh_abort_cnt;
}
-static int
-iscsi_conn_send_pdu(struct iscsi_cls_conn *cls_conn, struct iscsi_hdr *hdr,
- char *data, uint32_t data_size)
+static struct iscsi_cls_session *
+iscsi_tcp_session_create(struct iscsi_transport *iscsit,
+ struct scsi_transport_template *scsit,
+ uint32_t initial_cmdsn, uint32_t *hostno)
{
- struct iscsi_conn *conn = cls_conn->dd_data;
- int rc;
+ struct iscsi_cls_session *cls_session;
+ struct iscsi_session *session;
+ uint32_t hn;
+ int cmd_i;
- mutex_lock(&conn->xmitmutex);
- rc = iscsi_conn_send_generic(conn, hdr, data, data_size);
- mutex_unlock(&conn->xmitmutex);
+ cls_session = iscsi_session_setup(iscsit, scsit,
+ sizeof(struct iscsi_tcp_cmd_task),
+ sizeof(struct iscsi_tcp_mgmt_task),
+ initial_cmdsn, &hn);
+ if (!cls_session)
+ return NULL;
+ *hostno = hn;
- return rc;
+ session = class_to_transport_session(cls_session);
+ for (cmd_i = 0; cmd_i < session->cmds_max; cmd_i++) {
+ struct iscsi_cmd_task *ctask = session->cmds[cmd_i];
+ struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
+
+ ctask->hdr = &tcp_ctask->hdr;
+ }
+
+ for (cmd_i = 0; cmd_i < session->mgmtpool_max; cmd_i++) {
+ struct iscsi_mgmt_task *mtask = session->mgmt_cmds[cmd_i];
+ struct iscsi_tcp_mgmt_task *tcp_mtask = mtask->dd_data;
+
+ mtask->hdr = &tcp_mtask->hdr;
+ }
+
+ if (iscsi_r2tpool_alloc(class_to_transport_session(cls_session)))
+ goto r2tpool_alloc_fail;
+
+ return cls_session;
+
+r2tpool_alloc_fail:
+ iscsi_session_teardown(cls_session);
+ return NULL;
}
+static void iscsi_tcp_session_destroy(struct iscsi_cls_session *cls_session)
+{
+ struct iscsi_session *session = class_to_transport_session(cls_session);
+ struct iscsi_data_task *dtask, *n;
+ int cmd_i;
+
+ for (cmd_i = 0; cmd_i < session->cmds_max; cmd_i++) {
+ struct iscsi_cmd_task *ctask = session->cmds[cmd_i];
+ struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
+
+ list_for_each_entry_safe(dtask, n, &tcp_ctask->dataqueue,
+ item) {
+ list_del(&dtask->item);
+ mempool_free(dtask, tcp_ctask->datapool);
+ }
+ }
+
+ iscsi_r2tpool_free(class_to_transport_session(cls_session));
+ iscsi_session_teardown(cls_session);
+}
+
+static struct scsi_host_template iscsi_sht = {
+ .name = "iSCSI Initiator over TCP/IP, v."
+ ISCSI_VERSION_STR,
+ .queuecommand = iscsi_queuecommand,
+ .change_queue_depth = iscsi_change_queue_depth,
+ .can_queue = ISCSI_XMIT_CMDS_MAX - 1,
+ .sg_tablesize = ISCSI_SG_TABLESIZE,
+ .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,
+ .eh_abort_handler = iscsi_eh_abort,
+ .eh_host_reset_handler = iscsi_eh_host_reset,
+ .use_clustering = DISABLE_CLUSTERING,
+ .proc_name = "iscsi_tcp",
+ .this_id = -1,
+};
+
static struct iscsi_transport iscsi_tcp_transport = {
.owner = THIS_MODULE,
.name = "tcp",
.caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST
| CAP_DATADGST,
+ .param_mask = ISCSI_MAX_RECV_DLENGTH |
+ ISCSI_MAX_XMIT_DLENGTH |
+ ISCSI_HDRDGST_EN |
+ ISCSI_DATADGST_EN |
+ ISCSI_INITIAL_R2T_EN |
+ ISCSI_MAX_R2T |
+ ISCSI_IMM_DATA_EN |
+ ISCSI_FIRST_BURST |
+ ISCSI_MAX_BURST |
+ ISCSI_PDU_INORDER_EN |
+ ISCSI_DATASEQ_INORDER_EN |
+ ISCSI_ERL |
+ ISCSI_CONN_PORT |
+ ISCSI_CONN_ADDRESS,
.host_template = &iscsi_sht,
- .hostdata_size = sizeof(struct iscsi_session),
.conndata_size = sizeof(struct iscsi_conn),
.max_conn = 1,
.max_cmd_len = ISCSI_TCP_MAX_CMD_LEN,
- .create_session = iscsi_session_create,
- .destroy_session = iscsi_session_destroy,
- .create_conn = iscsi_conn_create,
- .bind_conn = iscsi_conn_bind,
- .destroy_conn = iscsi_conn_destroy,
+ /* session management */
+ .create_session = iscsi_tcp_session_create,
+ .destroy_session = iscsi_tcp_session_destroy,
+ /* connection management */
+ .create_conn = iscsi_tcp_conn_create,
+ .bind_conn = iscsi_tcp_conn_bind,
+ .destroy_conn = iscsi_tcp_conn_destroy,
.set_param = iscsi_conn_set_param,
.get_conn_param = iscsi_conn_get_param,
+ .get_conn_str_param = iscsi_conn_get_str_param,
.get_session_param = iscsi_session_get_param,
.start_conn = iscsi_conn_start,
.stop_conn = iscsi_conn_stop,
+ /* these are called as part of conn recovery */
+ .suspend_conn_recv = iscsi_tcp_suspend_conn_rx,
+ .terminate_conn = iscsi_tcp_terminate_conn,
+ /* IO */
.send_pdu = iscsi_conn_send_pdu,
.get_stats = iscsi_conn_get_stats,
+ .init_cmd_task = iscsi_tcp_cmd_init,
+ .init_mgmt_task = iscsi_tcp_mgmt_init,
+ .xmit_cmd_task = iscsi_tcp_ctask_xmit,
+ .xmit_mgmt_task = iscsi_tcp_mtask_xmit,
+ .cleanup_cmd_task = iscsi_tcp_cleanup_ctask,
+ /* recovery */
+ .session_recovery_timedout = iscsi_session_recovery_timedout,
};
static int __init
diff --git a/drivers/scsi/iscsi_tcp.h b/drivers/scsi/iscsi_tcp.h
index ba26741..c591885 100644
--- a/drivers/scsi/iscsi_tcp.h
+++ b/drivers/scsi/iscsi_tcp.h
@@ -2,7 +2,8 @@
* iSCSI Initiator TCP Transport
* Copyright (C) 2004 Dmitry Yusupov
* Copyright (C) 2004 Alex Aizman
- * Copyright (C) 2005 Mike Christie
+ * Copyright (C) 2005 - 2006 Mike Christie
+ * Copyright (C) 2006 Red Hat, Inc. All rights reserved.
* maintained by open-iscsi@googlegroups.com
*
* This program is free software; you can redistribute it and/or modify
@@ -21,20 +22,7 @@
#ifndef ISCSI_TCP_H
#define ISCSI_TCP_H
-/* Session's states */
-#define ISCSI_STATE_FREE 1
-#define ISCSI_STATE_LOGGED_IN 2
-#define ISCSI_STATE_FAILED 3
-#define ISCSI_STATE_TERMINATE 4
-
-/* Connection's states */
-#define ISCSI_CONN_INITIAL_STAGE 0
-#define ISCSI_CONN_STARTED 1
-#define ISCSI_CONN_STOPPED 2
-#define ISCSI_CONN_CLEANUP_WAIT 3
-
-/* Connection suspend "bit" */
-#define SUSPEND_BIT 1
+#include <scsi/libiscsi.h>
/* Socket's Receive state machine */
#define IN_PROGRESS_WAIT_HEADER 0x0
@@ -42,12 +30,6 @@
#define IN_PROGRESS_DATA_RECV 0x2
#define IN_PROGRESS_DDIGEST_RECV 0x3
-/* Task Mgmt states */
-#define TMABORT_INITIAL 0x0
-#define TMABORT_SUCCESS 0x1
-#define TMABORT_FAILED 0x2
-#define TMABORT_TIMEDOUT 0x3
-
/* xmit state machine */
#define XMSTATE_IDLE 0x0
#define XMSTATE_R_HDR 0x1
@@ -62,34 +44,14 @@
#define XMSTATE_W_PAD 0x200
#define XMSTATE_DATA_DIGEST 0x400
-#define ISCSI_CONN_MAX 1
#define ISCSI_CONN_RCVBUF_MIN 262144
#define ISCSI_CONN_SNDBUF_MIN 262144
#define ISCSI_PAD_LEN 4
#define ISCSI_R2T_MAX 16
-#define ISCSI_XMIT_CMDS_MAX 128 /* must be power of 2 */
-#define ISCSI_MGMT_CMDS_MAX 32 /* must be power of 2 */
-#define ISCSI_MGMT_ITT_OFFSET 0xa00
#define ISCSI_SG_TABLESIZE SG_ALL
-#define ISCSI_DEF_CMD_PER_LUN 32
-#define ISCSI_MAX_CMD_PER_LUN 128
#define ISCSI_TCP_MAX_CMD_LEN 16
-#define ITT_MASK (0xfff)
-#define CID_SHIFT 12
-#define CID_MASK (0xffff<<CID_SHIFT)
-#define AGE_SHIFT 28
-#define AGE_MASK (0xf<<AGE_SHIFT)
-
-struct iscsi_queue {
- struct kfifo *queue; /* FIFO Queue */
- void **pool; /* Pool of elements */
- int max; /* Max number of elements */
-};
-
-struct iscsi_session;
-struct iscsi_cmd_task;
-struct iscsi_mgmt_task;
+struct socket;
/* Socket connection recieve helper */
struct iscsi_tcp_recv {
@@ -104,48 +66,32 @@
struct iscsi_cmd_task *ctask; /* current cmd in progress */
/* copied and flipped values */
- int opcode;
- int flags;
- int cmd_status;
- int ahslen;
int datalen;
- uint32_t itt;
int datadgst;
+ char zero_copy_hdr;
};
-struct iscsi_cls_conn;
-
-struct iscsi_conn {
- struct iscsi_cls_conn *cls_conn; /* ptr to class connection */
+struct iscsi_tcp_conn {
+ struct iscsi_conn *iscsi_conn;
+ struct socket *sock;
struct iscsi_hdr hdr; /* header placeholder */
char hdrext[4*sizeof(__u16) +
sizeof(__u32)];
int data_copied;
char *data; /* data placeholder */
- struct socket *sock; /* TCP socket */
int data_size; /* actual recv_dlength */
int stop_stage; /* conn_stop() flag: *
* stop to recover, *
* stop to terminate */
/* iSCSI connection-wide sequencing */
- uint32_t exp_statsn;
int hdr_size; /* PDU header size */
- unsigned long suspend_rx; /* suspend Rx */
struct crypto_tfm *rx_tfm; /* CRC32C (Rx) */
struct crypto_tfm *data_rx_tfm; /* CRC32C (Rx) for data */
/* control data */
- int senselen; /* scsi sense length */
- int id; /* CID */
struct iscsi_tcp_recv in; /* TCP receive context */
- struct iscsi_session *session; /* parent session */
- struct list_head item; /* maintains list of conns */
int in_progress; /* connection state machine */
- int c_stage; /* connection state */
- struct iscsi_mgmt_task *login_mtask; /* mtask used for login/text */
- struct iscsi_mgmt_task *mtask; /* xmit mtask in progress */
- struct iscsi_cmd_task *ctask; /* xmit ctask in progress */
/* old values for socket callbacks */
void (*old_data_ready)(struct sock *, int);
@@ -155,93 +101,14 @@
/* xmit */
struct crypto_tfm *tx_tfm; /* CRC32C (Tx) */
struct crypto_tfm *data_tx_tfm; /* CRC32C (Tx) for data */
- struct kfifo *writequeue; /* write cmds for Data-Outs */
- struct kfifo *immqueue; /* immediate xmit queue */
- struct kfifo *mgmtqueue; /* mgmt (control) xmit queue */
- struct kfifo *xmitqueue; /* data-path cmd queue */
- struct work_struct xmitwork; /* per-conn. xmit workqueue */
- struct mutex xmitmutex; /* serializes connection xmit,
- * access to kfifos: *
- * xmitqueue, writequeue, *
- * immqueue, mgmtqueue */
- unsigned long suspend_tx; /* suspend Tx */
- /* abort */
- wait_queue_head_t ehwait; /* used in eh_abort() */
- struct iscsi_tm tmhdr;
- struct timer_list tmabort_timer; /* abort timer */
- int tmabort_state; /* see TMABORT_INITIAL, etc.*/
-
- /* negotiated params */
- int max_recv_dlength;
- int max_xmit_dlength;
- int hdrdgst_en;
- int datadgst_en;
-
- /* MIB-statistics */
- uint64_t txdata_octets;
- uint64_t rxdata_octets;
- uint32_t scsicmd_pdus_cnt;
- uint32_t dataout_pdus_cnt;
- uint32_t scsirsp_pdus_cnt;
- uint32_t datain_pdus_cnt;
- uint32_t r2t_pdus_cnt;
- uint32_t tmfcmd_pdus_cnt;
- int32_t tmfrsp_pdus_cnt;
-
- /* custom statistics */
+ /* MIB custom statistics */
uint32_t sendpage_failures_cnt;
uint32_t discontiguous_hdr_cnt;
- uint32_t eh_abort_cnt;
ssize_t (*sendpage)(struct socket *, struct page *, int, size_t, int);
};
-struct iscsi_session {
- /* iSCSI session-wide sequencing */
- uint32_t cmdsn;
- uint32_t exp_cmdsn;
- uint32_t max_cmdsn;
-
- /* configuration */
- int initial_r2t_en;
- int max_r2t;
- int imm_data_en;
- int first_burst;
- int max_burst;
- int time2wait;
- int time2retain;
- int pdu_inorder_en;
- int dataseq_inorder_en;
- int erl;
- int ifmarker_en;
- int ofmarker_en;
-
- /* control data */
- struct Scsi_Host *host;
- int id;
- struct iscsi_conn *leadconn; /* leading connection */
- spinlock_t lock; /* protects session state, *
- * sequence numbers, *
- * session resources: *
- * - cmdpool, *
- * - mgmtpool, *
- * - r2tpool */
- int state; /* session state */
- struct list_head item;
- void *auth_client;
- int conn_cnt;
- int age; /* counts session re-opens */
-
- struct list_head connections; /* list of connections */
- int cmds_max; /* size of cmds array */
- struct iscsi_cmd_task **cmds; /* Original Cmds arr */
- struct iscsi_queue cmdpool; /* PDU's pool */
- int mgmtpool_max; /* size of mgmt array */
- struct iscsi_mgmt_task **mgmt_cmds; /* Original mgmt arr */
- struct iscsi_queue mgmtpool; /* Mgmt PDU's pool */
-};
-
struct iscsi_buf {
struct scatterlist sg;
unsigned int sent;
@@ -257,16 +124,13 @@
};
#define ISCSI_DTASK_DEFAULT_MAX ISCSI_SG_TABLESIZE * PAGE_SIZE / 512
-struct iscsi_mgmt_task {
- struct iscsi_hdr hdr; /* mgmt. PDU */
- char hdrext[sizeof(__u32)]; /* Header-Digest */
- char *data; /* mgmt payload */
+struct iscsi_tcp_mgmt_task {
+ struct iscsi_hdr hdr;
+ char hdrext[sizeof(__u32)]; /* Header-Digest */
int xmstate; /* mgmt xmit progress */
- int data_count; /* counts data to be sent */
struct iscsi_buf headbuf; /* header buffer */
struct iscsi_buf sendbuf; /* in progress buffer */
int sent;
- uint32_t itt; /* this ITT */
};
struct iscsi_r2t_info {
@@ -283,33 +147,22 @@
struct iscsi_data_task *dtask; /* which data task */
};
-struct iscsi_cmd_task {
- struct iscsi_cmd hdr; /* iSCSI PDU header */
+struct iscsi_tcp_cmd_task {
+ struct iscsi_cmd hdr;
char hdrext[4*sizeof(__u16)+ /* AHS */
sizeof(__u32)]; /* HeaderDigest */
char pad[ISCSI_PAD_LEN];
- int itt; /* this ITT */
- int datasn; /* DataSN */
+ int pad_count; /* padded bytes */
struct iscsi_buf headbuf; /* header buf (xmit) */
struct iscsi_buf sendbuf; /* in progress buffer*/
+ int xmstate; /* xmit xtate machine */
int sent;
struct scatterlist *sg; /* per-cmd SG list */
struct scatterlist *bad_sg; /* assert statement */
int sg_count; /* SG's to process */
- uint32_t unsol_datasn;
uint32_t exp_r2tsn;
- int xmstate; /* xmit xtate machine */
- int imm_count; /* imm-data (bytes) */
- int unsol_count; /* unsolicited (bytes)*/
int r2t_data_count; /* R2T Data-Out bytes */
- int data_count; /* remaining Data-Out */
- int pad_count; /* padded bytes */
- struct scsi_cmnd *sc; /* associated SCSI cmd*/
- int total_length;
int data_offset;
- struct iscsi_conn *conn; /* used connection */
- struct iscsi_mgmt_task *mtask; /* tmf mtask in progr */
-
struct iscsi_r2t_info *r2t; /* in progress R2T */
struct iscsi_queue r2tpool;
struct kfifo *r2tqueue;
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
new file mode 100644
index 0000000..274a137
--- /dev/null
+++ b/drivers/scsi/libiscsi.c
@@ -0,0 +1,1697 @@
+/*
+ * iSCSI lib functions
+ *
+ * Copyright (C) 2006 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2004 - 2006 Mike Christie
+ * Copyright (C) 2004 - 2005 Dmitry Yusupov
+ * Copyright (C) 2004 - 2005 Alex Aizman
+ * maintained by open-iscsi@googlegroups.com
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+#include <linux/types.h>
+#include <linux/mutex.h>
+#include <linux/kfifo.h>
+#include <linux/delay.h>
+#include <net/tcp.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_eh.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi.h>
+#include <scsi/iscsi_proto.h>
+#include <scsi/scsi_transport.h>
+#include <scsi/scsi_transport_iscsi.h>
+#include <scsi/libiscsi.h>
+
+struct iscsi_session *
+class_to_transport_session(struct iscsi_cls_session *cls_session)
+{
+ struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
+ return iscsi_hostdata(shost->hostdata);
+}
+EXPORT_SYMBOL_GPL(class_to_transport_session);
+
+#define INVALID_SN_DELTA 0xffff
+
+int
+iscsi_check_assign_cmdsn(struct iscsi_session *session, struct iscsi_nopin *hdr)
+{
+ uint32_t max_cmdsn = be32_to_cpu(hdr->max_cmdsn);
+ uint32_t exp_cmdsn = be32_to_cpu(hdr->exp_cmdsn);
+
+ if (max_cmdsn < exp_cmdsn -1 &&
+ max_cmdsn > exp_cmdsn - INVALID_SN_DELTA)
+ return ISCSI_ERR_MAX_CMDSN;
+ if (max_cmdsn > session->max_cmdsn ||
+ max_cmdsn < session->max_cmdsn - INVALID_SN_DELTA)
+ session->max_cmdsn = max_cmdsn;
+ if (exp_cmdsn > session->exp_cmdsn ||
+ exp_cmdsn < session->exp_cmdsn - INVALID_SN_DELTA)
+ session->exp_cmdsn = exp_cmdsn;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(iscsi_check_assign_cmdsn);
+
+void iscsi_prep_unsolicit_data_pdu(struct iscsi_cmd_task *ctask,
+ struct iscsi_data *hdr,
+ int transport_data_cnt)
+{
+ struct iscsi_conn *conn = ctask->conn;
+
+ memset(hdr, 0, sizeof(struct iscsi_data));
+ hdr->ttt = cpu_to_be32(ISCSI_RESERVED_TAG);
+ hdr->datasn = cpu_to_be32(ctask->unsol_datasn);
+ ctask->unsol_datasn++;
+ hdr->opcode = ISCSI_OP_SCSI_DATA_OUT;
+ memcpy(hdr->lun, ctask->hdr->lun, sizeof(hdr->lun));
+
+ hdr->itt = ctask->hdr->itt;
+ hdr->exp_statsn = cpu_to_be32(conn->exp_statsn);
+
+ hdr->offset = cpu_to_be32(ctask->total_length -
+ transport_data_cnt -
+ ctask->unsol_count);
+
+ if (ctask->unsol_count > conn->max_xmit_dlength) {
+ hton24(hdr->dlength, conn->max_xmit_dlength);
+ ctask->data_count = conn->max_xmit_dlength;
+ hdr->flags = 0;
+ } else {
+ hton24(hdr->dlength, ctask->unsol_count);
+ ctask->data_count = ctask->unsol_count;
+ hdr->flags = ISCSI_FLAG_CMD_FINAL;
+ }
+}
+EXPORT_SYMBOL_GPL(iscsi_prep_unsolicit_data_pdu);
+
+/**
+ * iscsi_prep_scsi_cmd_pdu - prep iscsi scsi cmd pdu
+ * @ctask: iscsi cmd task
+ *
+ * Prep basic iSCSI PDU fields for a scsi cmd pdu. The LLD should set
+ * fields like dlength or final based on how much data it sends
+ */
+static void iscsi_prep_scsi_cmd_pdu(struct iscsi_cmd_task *ctask)
+{
+ struct iscsi_conn *conn = ctask->conn;
+ struct iscsi_session *session = conn->session;
+ struct iscsi_cmd *hdr = ctask->hdr;
+ struct scsi_cmnd *sc = ctask->sc;
+
+ hdr->opcode = ISCSI_OP_SCSI_CMD;
+ hdr->flags = ISCSI_ATTR_SIMPLE;
+ int_to_scsilun(sc->device->lun, (struct scsi_lun *)hdr->lun);
+ hdr->itt = ctask->itt | (conn->id << ISCSI_CID_SHIFT) |
+ (session->age << ISCSI_AGE_SHIFT);
+ hdr->data_length = cpu_to_be32(sc->request_bufflen);
+ hdr->cmdsn = cpu_to_be32(session->cmdsn);
+ session->cmdsn++;
+ hdr->exp_statsn = cpu_to_be32(conn->exp_statsn);
+ memcpy(hdr->cdb, sc->cmnd, sc->cmd_len);
+ memset(&hdr->cdb[sc->cmd_len], 0, MAX_COMMAND_SIZE - sc->cmd_len);
+
+ if (sc->sc_data_direction == DMA_TO_DEVICE) {
+ hdr->flags |= ISCSI_FLAG_CMD_WRITE;
+ /*
+ * Write counters:
+ *
+ * imm_count bytes to be sent right after
+ * SCSI PDU Header
+ *
+ * unsol_count bytes(as Data-Out) to be sent
+ * without R2T ack right after
+ * immediate data
+ *
+ * r2t_data_count bytes to be sent via R2T ack's
+ *
+ * pad_count bytes to be sent as zero-padding
+ */
+ ctask->imm_count = 0;
+ ctask->unsol_count = 0;
+ ctask->unsol_datasn = 0;
+
+ if (session->imm_data_en) {
+ if (ctask->total_length >= session->first_burst)
+ ctask->imm_count = min(session->first_burst,
+ conn->max_xmit_dlength);
+ else
+ ctask->imm_count = min(ctask->total_length,
+ conn->max_xmit_dlength);
+ hton24(ctask->hdr->dlength, ctask->imm_count);
+ } else
+ zero_data(ctask->hdr->dlength);
+
+ if (!session->initial_r2t_en)
+ ctask->unsol_count = min(session->first_burst,
+ ctask->total_length) - ctask->imm_count;
+ if (!ctask->unsol_count)
+ /* No unsolicit Data-Out's */
+ ctask->hdr->flags |= ISCSI_FLAG_CMD_FINAL;
+ } else {
+ ctask->datasn = 0;
+ hdr->flags |= ISCSI_FLAG_CMD_FINAL;
+ zero_data(hdr->dlength);
+
+ if (sc->sc_data_direction == DMA_FROM_DEVICE)
+ hdr->flags |= ISCSI_FLAG_CMD_READ;
+ }
+
+ conn->scsicmd_pdus_cnt++;
+}
+EXPORT_SYMBOL_GPL(iscsi_prep_scsi_cmd_pdu);
+
+/**
+ * iscsi_complete_command - return command back to scsi-ml
+ * @session: iscsi session
+ * @ctask: iscsi cmd task
+ *
+ * Must be called with session lock.
+ * This function returns the scsi command to scsi-ml and returns
+ * the cmd task to the pool of available cmd tasks.
+ */
+static void iscsi_complete_command(struct iscsi_session *session,
+ struct iscsi_cmd_task *ctask)
+{
+ struct scsi_cmnd *sc = ctask->sc;
+
+ ctask->sc = NULL;
+ list_del_init(&ctask->running);
+ __kfifo_put(session->cmdpool.queue, (void*)&ctask, sizeof(void*));
+ sc->scsi_done(sc);
+}
+
+/**
+ * iscsi_cmd_rsp - SCSI Command Response processing
+ * @conn: iscsi connection
+ * @hdr: iscsi header
+ * @ctask: scsi command task
+ * @data: cmd data buffer
+ * @datalen: len of buffer
+ *
+ * iscsi_cmd_rsp sets up the scsi_cmnd fields based on the PDU and
+ * then completes the command and task.
+ **/
+static int iscsi_scsi_cmd_rsp(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
+ struct iscsi_cmd_task *ctask, char *data,
+ int datalen)
+{
+ int rc;
+ struct iscsi_cmd_rsp *rhdr = (struct iscsi_cmd_rsp *)hdr;
+ struct iscsi_session *session = conn->session;
+ struct scsi_cmnd *sc = ctask->sc;
+
+ rc = iscsi_check_assign_cmdsn(session, (struct iscsi_nopin*)rhdr);
+ if (rc) {
+ sc->result = DID_ERROR << 16;
+ goto out;
+ }
+
+ conn->exp_statsn = be32_to_cpu(rhdr->statsn) + 1;
+
+ sc->result = (DID_OK << 16) | rhdr->cmd_status;
+
+ if (rhdr->response != ISCSI_STATUS_CMD_COMPLETED) {
+ sc->result = DID_ERROR << 16;
+ goto out;
+ }
+
+ if (rhdr->cmd_status == SAM_STAT_CHECK_CONDITION) {
+ int senselen;
+
+ if (datalen < 2) {
+invalid_datalen:
+ printk(KERN_ERR "Got CHECK_CONDITION but invalid "
+ "data buffer size of %d\n", datalen);
+ sc->result = DID_BAD_TARGET << 16;
+ goto out;
+ }
+
+ senselen = (data[0] << 8) | data[1];
+ if (datalen < senselen)
+ goto invalid_datalen;
+
+ memcpy(sc->sense_buffer, data + 2,
+ min(senselen, SCSI_SENSE_BUFFERSIZE));
+ debug_scsi("copied %d bytes of sense\n",
+ min(senselen, SCSI_SENSE_BUFFERSIZE));
+ }
+
+ if (sc->sc_data_direction == DMA_TO_DEVICE)
+ goto out;
+
+ if (rhdr->flags & ISCSI_FLAG_CMD_UNDERFLOW) {
+ int res_count = be32_to_cpu(rhdr->residual_count);
+
+ if (res_count > 0 && res_count <= sc->request_bufflen)
+ sc->resid = res_count;
+ else
+ sc->result = (DID_BAD_TARGET << 16) | rhdr->cmd_status;
+ } else if (rhdr->flags & ISCSI_FLAG_CMD_BIDI_UNDERFLOW)
+ sc->result = (DID_BAD_TARGET << 16) | rhdr->cmd_status;
+ else if (rhdr->flags & ISCSI_FLAG_CMD_OVERFLOW)
+ sc->resid = be32_to_cpu(rhdr->residual_count);
+
+out:
+ debug_scsi("done [sc %lx res %d itt 0x%x]\n",
+ (long)sc, sc->result, ctask->itt);
+ conn->scsirsp_pdus_cnt++;
+
+ iscsi_complete_command(conn->session, ctask);
+ return rc;
+}
+
+/**
+ * __iscsi_complete_pdu - complete pdu
+ * @conn: iscsi conn
+ * @hdr: iscsi header
+ * @data: data buffer
+ * @datalen: len of data buffer
+ *
+ * Completes pdu processing by freeing any resources allocated at
+ * queuecommand or send generic. session lock must be held and verify
+ * itt must have been called.
+ */
+int __iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
+ char *data, int datalen)
+{
+ struct iscsi_session *session = conn->session;
+ int opcode = hdr->opcode & ISCSI_OPCODE_MASK, rc = 0;
+ struct iscsi_cmd_task *ctask;
+ struct iscsi_mgmt_task *mtask;
+ uint32_t itt;
+
+ if (hdr->itt != cpu_to_be32(ISCSI_RESERVED_TAG))
+ itt = hdr->itt & ISCSI_ITT_MASK;
+ else
+ itt = hdr->itt;
+
+ if (itt < session->cmds_max) {
+ ctask = session->cmds[itt];
+
+ debug_scsi("cmdrsp [op 0x%x cid %d itt 0x%x len %d]\n",
+ opcode, conn->id, ctask->itt, datalen);
+
+ switch(opcode) {
+ case ISCSI_OP_SCSI_CMD_RSP:
+ BUG_ON((void*)ctask != ctask->sc->SCp.ptr);
+ rc = iscsi_scsi_cmd_rsp(conn, hdr, ctask, data,
+ datalen);
+ break;
+ case ISCSI_OP_SCSI_DATA_IN:
+ BUG_ON((void*)ctask != ctask->sc->SCp.ptr);
+ if (hdr->flags & ISCSI_FLAG_DATA_STATUS) {
+ conn->scsirsp_pdus_cnt++;
+ iscsi_complete_command(session, ctask);
+ }
+ break;
+ case ISCSI_OP_R2T:
+ /* LLD handles this for now */
+ break;
+ default:
+ rc = ISCSI_ERR_BAD_OPCODE;
+ break;
+ }
+ } else if (itt >= ISCSI_MGMT_ITT_OFFSET &&
+ itt < ISCSI_MGMT_ITT_OFFSET + session->mgmtpool_max) {
+ mtask = session->mgmt_cmds[itt - ISCSI_MGMT_ITT_OFFSET];
+
+ debug_scsi("immrsp [op 0x%x cid %d itt 0x%x len %d]\n",
+ opcode, conn->id, mtask->itt, datalen);
+
+ switch(opcode) {
+ case ISCSI_OP_LOGIN_RSP:
+ case ISCSI_OP_TEXT_RSP:
+ case ISCSI_OP_LOGOUT_RSP:
+ rc = iscsi_check_assign_cmdsn(session,
+ (struct iscsi_nopin*)hdr);
+ if (rc)
+ break;
+
+ rc = iscsi_recv_pdu(conn->cls_conn, hdr, data, datalen);
+ list_del(&mtask->running);
+ if (conn->login_mtask != mtask)
+ __kfifo_put(session->mgmtpool.queue,
+ (void*)&mtask, sizeof(void*));
+ break;
+ case ISCSI_OP_SCSI_TMFUNC_RSP:
+ rc = iscsi_check_assign_cmdsn(session,
+ (struct iscsi_nopin*)hdr);
+ if (rc)
+ break;
+
+ if (datalen) {
+ rc = ISCSI_ERR_PROTO;
+ break;
+ }
+ conn->tmfrsp_pdus_cnt++;
+ if (conn->tmabort_state == TMABORT_INITIAL) {
+ conn->tmabort_state =
+ ((struct iscsi_tm_rsp *)hdr)->
+ response == ISCSI_TMF_RSP_COMPLETE ?
+ TMABORT_SUCCESS:TMABORT_FAILED;
+ /* unblock eh_abort() */
+ wake_up(&conn->ehwait);
+ }
+ break;
+ case ISCSI_OP_NOOP_IN:
+ if (hdr->ttt != ISCSI_RESERVED_TAG) {
+ rc = ISCSI_ERR_PROTO;
+ break;
+ }
+ rc = iscsi_check_assign_cmdsn(session,
+ (struct iscsi_nopin*)hdr);
+ if (rc)
+ break;
+ conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1;
+
+ rc = iscsi_recv_pdu(conn->cls_conn, hdr, data, datalen);
+ list_del(&mtask->running);
+ if (conn->login_mtask != mtask)
+ __kfifo_put(session->mgmtpool.queue,
+ (void*)&mtask, sizeof(void*));
+ break;
+ default:
+ rc = ISCSI_ERR_BAD_OPCODE;
+ break;
+ }
+ } else if (itt == ISCSI_RESERVED_TAG) {
+ switch(opcode) {
+ case ISCSI_OP_NOOP_IN:
+ if (!datalen) {
+ rc = iscsi_check_assign_cmdsn(session,
+ (struct iscsi_nopin*)hdr);
+ if (!rc && hdr->ttt != ISCSI_RESERVED_TAG)
+ rc = iscsi_recv_pdu(conn->cls_conn,
+ hdr, NULL, 0);
+ } else
+ rc = ISCSI_ERR_PROTO;
+ break;
+ case ISCSI_OP_REJECT:
+ /* we need sth like iscsi_reject_rsp()*/
+ case ISCSI_OP_ASYNC_EVENT:
+ /* we need sth like iscsi_async_event_rsp() */
+ rc = ISCSI_ERR_BAD_OPCODE;
+ break;
+ default:
+ rc = ISCSI_ERR_BAD_OPCODE;
+ break;
+ }
+ } else
+ rc = ISCSI_ERR_BAD_ITT;
+
+ return rc;
+}
+EXPORT_SYMBOL_GPL(__iscsi_complete_pdu);
+
+int iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
+ char *data, int datalen)
+{
+ int rc;
+
+ spin_lock(&conn->session->lock);
+ rc = __iscsi_complete_pdu(conn, hdr, data, datalen);
+ spin_unlock(&conn->session->lock);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(iscsi_complete_pdu);
+
+/* verify itt (itt encoding: age+cid+itt) */
+int iscsi_verify_itt(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
+ uint32_t *ret_itt)
+{
+ struct iscsi_session *session = conn->session;
+ struct iscsi_cmd_task *ctask;
+ uint32_t itt;
+
+ if (hdr->itt != cpu_to_be32(ISCSI_RESERVED_TAG)) {
+ if ((hdr->itt & ISCSI_AGE_MASK) !=
+ (session->age << ISCSI_AGE_SHIFT)) {
+ printk(KERN_ERR "iscsi_tcp: received itt %x expected "
+ "session age (%x)\n", hdr->itt,
+ session->age & ISCSI_AGE_MASK);
+ return ISCSI_ERR_BAD_ITT;
+ }
+
+ if ((hdr->itt & ISCSI_CID_MASK) !=
+ (conn->id << ISCSI_CID_SHIFT)) {
+ printk(KERN_ERR "iscsi_tcp: received itt %x, expected "
+ "CID (%x)\n", hdr->itt, conn->id);
+ return ISCSI_ERR_BAD_ITT;
+ }
+ itt = hdr->itt & ISCSI_ITT_MASK;
+ } else
+ itt = hdr->itt;
+
+ if (itt < session->cmds_max) {
+ ctask = session->cmds[itt];
+
+ if (!ctask->sc) {
+ printk(KERN_INFO "iscsi_tcp: dropping ctask with "
+ "itt 0x%x\n", ctask->itt);
+ /* force drop */
+ return ISCSI_ERR_NO_SCSI_CMD;
+ }
+
+ if (ctask->sc->SCp.phase != session->age) {
+ printk(KERN_ERR "iscsi_tcp: ctask's session age %d, "
+ "expected %d\n", ctask->sc->SCp.phase,
+ session->age);
+ return ISCSI_ERR_SESSION_FAILED;
+ }
+ }
+
+ *ret_itt = itt;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(iscsi_verify_itt);
+
+void iscsi_conn_failure(struct iscsi_conn *conn, enum iscsi_err err)
+{
+ struct iscsi_session *session = conn->session;
+ unsigned long flags;
+
+ spin_lock_irqsave(&session->lock, flags);
+ if (session->conn_cnt == 1 || session->leadconn == conn)
+ session->state = ISCSI_STATE_FAILED;
+ spin_unlock_irqrestore(&session->lock, flags);
+ set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
+ set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx);
+ iscsi_conn_error(conn->cls_conn, err);
+}
+EXPORT_SYMBOL_GPL(iscsi_conn_failure);
+
+/**
+ * iscsi_data_xmit - xmit any command into the scheduled connection
+ * @conn: iscsi connection
+ *
+ * Notes:
+ * The function can return -EAGAIN in which case the caller must
+ * re-schedule it again later or recover. '0' return code means
+ * successful xmit.
+ **/
+static int iscsi_data_xmit(struct iscsi_conn *conn)
+{
+ struct iscsi_transport *tt;
+
+ if (unlikely(conn->suspend_tx)) {
+ debug_scsi("conn %d Tx suspended!\n", conn->id);
+ return 0;
+ }
+ tt = conn->session->tt;
+
+ /*
+ * Transmit in the following order:
+ *
+ * 1) un-finished xmit (ctask or mtask)
+ * 2) immediate control PDUs
+ * 3) write data
+ * 4) SCSI commands
+ * 5) non-immediate control PDUs
+ *
+ * No need to lock around __kfifo_get as long as
+ * there's one producer and one consumer.
+ */
+
+ BUG_ON(conn->ctask && conn->mtask);
+
+ if (conn->ctask) {
+ if (tt->xmit_cmd_task(conn, conn->ctask))
+ goto again;
+ /* done with this in-progress ctask */
+ conn->ctask = NULL;
+ }
+ if (conn->mtask) {
+ if (tt->xmit_mgmt_task(conn, conn->mtask))
+ goto again;
+ /* done with this in-progress mtask */
+ conn->mtask = NULL;
+ }
+
+ /* process immediate first */
+ if (unlikely(__kfifo_len(conn->immqueue))) {
+ while (__kfifo_get(conn->immqueue, (void*)&conn->mtask,
+ sizeof(void*))) {
+ list_add_tail(&conn->mtask->running,
+ &conn->mgmt_run_list);
+ if (tt->xmit_mgmt_task(conn, conn->mtask))
+ goto again;
+ }
+ /* done with this mtask */
+ conn->mtask = NULL;
+ }
+
+ /* process command queue */
+ while (__kfifo_get(conn->xmitqueue, (void*)&conn->ctask,
+ sizeof(void*))) {
+ /*
+ * iscsi tcp may readd the task to the xmitqueue to send
+ * write data
+ */
+ if (list_empty(&conn->ctask->running))
+ list_add_tail(&conn->ctask->running, &conn->run_list);
+ if (tt->xmit_cmd_task(conn, conn->ctask))
+ goto again;
+ }
+ /* done with this ctask */
+ conn->ctask = NULL;
+
+ /* process the rest control plane PDUs, if any */
+ if (unlikely(__kfifo_len(conn->mgmtqueue))) {
+ while (__kfifo_get(conn->mgmtqueue, (void*)&conn->mtask,
+ sizeof(void*))) {
+ list_add_tail(&conn->mtask->running,
+ &conn->mgmt_run_list);
+ if (tt->xmit_mgmt_task(conn, conn->mtask))
+ goto again;
+ }
+ /* done with this mtask */
+ conn->mtask = NULL;
+ }
+
+ return 0;
+
+again:
+ if (unlikely(conn->suspend_tx))
+ return 0;
+
+ return -EAGAIN;
+}
+
+static void iscsi_xmitworker(void *data)
+{
+ struct iscsi_conn *conn = data;
+
+ /*
+ * serialize Xmit worker on a per-connection basis.
+ */
+ mutex_lock(&conn->xmitmutex);
+ if (iscsi_data_xmit(conn))
+ scsi_queue_work(conn->session->host, &conn->xmitwork);
+ mutex_unlock(&conn->xmitmutex);
+}
+
+enum {
+ FAILURE_BAD_HOST = 1,
+ FAILURE_SESSION_FAILED,
+ FAILURE_SESSION_FREED,
+ FAILURE_WINDOW_CLOSED,
+ FAILURE_SESSION_TERMINATE,
+ FAILURE_SESSION_RECOVERY_TIMEOUT,
+};
+
+int iscsi_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
+{
+ struct Scsi_Host *host;
+ int reason = 0;
+ struct iscsi_session *session;
+ struct iscsi_conn *conn;
+ struct iscsi_cmd_task *ctask = NULL;
+
+ sc->scsi_done = done;
+ sc->result = 0;
+
+ host = sc->device->host;
+ session = iscsi_hostdata(host->hostdata);
+
+ spin_lock(&session->lock);
+
+ if (session->state != ISCSI_STATE_LOGGED_IN) {
+ if (session->recovery_failed) {
+ reason = FAILURE_SESSION_RECOVERY_TIMEOUT;
+ goto fault;
+ } else if (session->state == ISCSI_STATE_FAILED) {
+ reason = FAILURE_SESSION_FAILED;
+ goto reject;
+ } else if (session->state == ISCSI_STATE_TERMINATE) {
+ reason = FAILURE_SESSION_TERMINATE;
+ goto fault;
+ }
+ reason = FAILURE_SESSION_FREED;
+ goto fault;
+ }
+
+ /*
+ * Check for iSCSI window and take care of CmdSN wrap-around
+ */
+ if ((int)(session->max_cmdsn - session->cmdsn) < 0) {
+ reason = FAILURE_WINDOW_CLOSED;
+ goto reject;
+ }
+
+ conn = session->leadconn;
+
+ __kfifo_get(session->cmdpool.queue, (void*)&ctask, sizeof(void*));
+ sc->SCp.phase = session->age;
+ sc->SCp.ptr = (char *)ctask;
+
+ ctask->mtask = NULL;
+ ctask->conn = conn;
+ ctask->sc = sc;
+ INIT_LIST_HEAD(&ctask->running);
+ ctask->total_length = sc->request_bufflen;
+ iscsi_prep_scsi_cmd_pdu(ctask);
+
+ session->tt->init_cmd_task(ctask);
+
+ __kfifo_put(conn->xmitqueue, (void*)&ctask, sizeof(void*));
+ debug_scsi(
+ "ctask enq [%s cid %d sc %lx itt 0x%x len %d cmdsn %d win %d]\n",
+ sc->sc_data_direction == DMA_TO_DEVICE ? "write" : "read",
+ conn->id, (long)sc, ctask->itt, sc->request_bufflen,
+ session->cmdsn, session->max_cmdsn - session->exp_cmdsn + 1);
+ spin_unlock(&session->lock);
+
+ scsi_queue_work(host, &conn->xmitwork);
+ return 0;
+
+reject:
+ spin_unlock(&session->lock);
+ debug_scsi("cmd 0x%x rejected (%d)\n", sc->cmnd[0], reason);
+ return SCSI_MLQUEUE_HOST_BUSY;
+
+fault:
+ spin_unlock(&session->lock);
+ printk(KERN_ERR "iscsi_tcp: cmd 0x%x is not queued (%d)\n",
+ sc->cmnd[0], reason);
+ sc->result = (DID_NO_CONNECT << 16);
+ sc->resid = sc->request_bufflen;
+ sc->scsi_done(sc);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(iscsi_queuecommand);
+
+int iscsi_change_queue_depth(struct scsi_device *sdev, int depth)
+{
+ if (depth > ISCSI_MAX_CMD_PER_LUN)
+ depth = ISCSI_MAX_CMD_PER_LUN;
+ scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
+ return sdev->queue_depth;
+}
+EXPORT_SYMBOL_GPL(iscsi_change_queue_depth);
+
+static int
+iscsi_conn_send_generic(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
+ char *data, uint32_t data_size)
+{
+ struct iscsi_session *session = conn->session;
+ struct iscsi_nopout *nop = (struct iscsi_nopout *)hdr;
+ struct iscsi_mgmt_task *mtask;
+
+ spin_lock_bh(&session->lock);
+ if (session->state == ISCSI_STATE_TERMINATE) {
+ spin_unlock_bh(&session->lock);
+ return -EPERM;
+ }
+ if (hdr->opcode == (ISCSI_OP_LOGIN | ISCSI_OP_IMMEDIATE) ||
+ hdr->opcode == (ISCSI_OP_TEXT | ISCSI_OP_IMMEDIATE))
+ /*
+ * Login and Text are sent serially, in
+ * request-followed-by-response sequence.
+ * Same mtask can be used. Same ITT must be used.
+ * Note that login_mtask is preallocated at conn_create().
+ */
+ mtask = conn->login_mtask;
+ else {
+ BUG_ON(conn->c_stage == ISCSI_CONN_INITIAL_STAGE);
+ BUG_ON(conn->c_stage == ISCSI_CONN_STOPPED);
+
+ if (!__kfifo_get(session->mgmtpool.queue,
+ (void*)&mtask, sizeof(void*))) {
+ spin_unlock_bh(&session->lock);
+ return -ENOSPC;
+ }
+ }
+
+ /*
+ * pre-format CmdSN and ExpStatSN for outgoing PDU.
+ */
+ if (hdr->itt != cpu_to_be32(ISCSI_RESERVED_TAG)) {
+ hdr->itt = mtask->itt | (conn->id << ISCSI_CID_SHIFT) |
+ (session->age << ISCSI_AGE_SHIFT);
+ nop->cmdsn = cpu_to_be32(session->cmdsn);
+ if (conn->c_stage == ISCSI_CONN_STARTED &&
+ !(hdr->opcode & ISCSI_OP_IMMEDIATE))
+ session->cmdsn++;
+ } else
+ /* do not advance CmdSN */
+ nop->cmdsn = cpu_to_be32(session->cmdsn);
+
+ nop->exp_statsn = cpu_to_be32(conn->exp_statsn);
+
+ if (data_size) {
+ memcpy(mtask->data, data, data_size);
+ mtask->data_count = data_size;
+ } else
+ mtask->data_count = 0;
+
+ INIT_LIST_HEAD(&mtask->running);
+ memcpy(mtask->hdr, hdr, sizeof(struct iscsi_hdr));
+ if (session->tt->init_mgmt_task)
+ session->tt->init_mgmt_task(conn, mtask, data, data_size);
+ spin_unlock_bh(&session->lock);
+
+ debug_scsi("mgmtpdu [op 0x%x hdr->itt 0x%x datalen %d]\n",
+ hdr->opcode, hdr->itt, data_size);
+
+ /*
+ * since send_pdu() could be called at least from two contexts,
+ * we need to serialize __kfifo_put, so we don't have to take
+ * additional lock on fast data-path
+ */
+ if (hdr->opcode & ISCSI_OP_IMMEDIATE)
+ __kfifo_put(conn->immqueue, (void*)&mtask, sizeof(void*));
+ else
+ __kfifo_put(conn->mgmtqueue, (void*)&mtask, sizeof(void*));
+
+ scsi_queue_work(session->host, &conn->xmitwork);
+ return 0;
+}
+
+int iscsi_conn_send_pdu(struct iscsi_cls_conn *cls_conn, struct iscsi_hdr *hdr,
+ char *data, uint32_t data_size)
+{
+ struct iscsi_conn *conn = cls_conn->dd_data;
+ int rc;
+
+ mutex_lock(&conn->xmitmutex);
+ rc = iscsi_conn_send_generic(conn, hdr, data, data_size);
+ mutex_unlock(&conn->xmitmutex);
+
+ return rc;
+}
+EXPORT_SYMBOL_GPL(iscsi_conn_send_pdu);
+
+void iscsi_session_recovery_timedout(struct iscsi_cls_session *cls_session)
+{
+ struct iscsi_session *session = class_to_transport_session(cls_session);
+ struct iscsi_conn *conn = session->leadconn;
+
+ spin_lock_bh(&session->lock);
+ if (session->state != ISCSI_STATE_LOGGED_IN) {
+ session->recovery_failed = 1;
+ if (conn)
+ wake_up(&conn->ehwait);
+ }
+ spin_unlock_bh(&session->lock);
+}
+EXPORT_SYMBOL_GPL(iscsi_session_recovery_timedout);
+
+int iscsi_eh_host_reset(struct scsi_cmnd *sc)
+{
+ struct Scsi_Host *host = sc->device->host;
+ struct iscsi_session *session = iscsi_hostdata(host->hostdata);
+ struct iscsi_conn *conn = session->leadconn;
+ int fail_session = 0;
+
+ spin_lock_bh(&session->lock);
+ if (session->state == ISCSI_STATE_TERMINATE) {
+failed:
+ debug_scsi("failing host reset: session terminated "
+ "[CID %d age %d]", conn->id, session->age);
+ spin_unlock_bh(&session->lock);
+ return FAILED;
+ }
+
+ if (sc->SCp.phase == session->age) {
+ debug_scsi("failing connection CID %d due to SCSI host reset",
+ conn->id);
+ fail_session = 1;
+ }
+ spin_unlock_bh(&session->lock);
+
+ /*
+ * we drop the lock here but the leadconn cannot be destoyed while
+ * we are in the scsi eh
+ */
+ if (fail_session) {
+ iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
+ /*
+ * if userspace cannot respond then we must kick this off
+ * here for it
+ */
+ iscsi_start_session_recovery(session, conn, STOP_CONN_RECOVER);
+ }
+
+ debug_scsi("iscsi_eh_host_reset wait for relogin\n");
+ wait_event_interruptible(conn->ehwait,
+ session->state == ISCSI_STATE_TERMINATE ||
+ session->state == ISCSI_STATE_LOGGED_IN ||
+ session->recovery_failed);
+ if (signal_pending(current))
+ flush_signals(current);
+
+ spin_lock_bh(&session->lock);
+ if (session->state == ISCSI_STATE_LOGGED_IN)
+ printk(KERN_INFO "host reset succeeded\n");
+ else
+ goto failed;
+ spin_unlock_bh(&session->lock);
+
+ return SUCCESS;
+}
+EXPORT_SYMBOL_GPL(iscsi_eh_host_reset);
+
+static void iscsi_tmabort_timedout(unsigned long data)
+{
+ struct iscsi_cmd_task *ctask = (struct iscsi_cmd_task *)data;
+ struct iscsi_conn *conn = ctask->conn;
+ struct iscsi_session *session = conn->session;
+
+ spin_lock(&session->lock);
+ if (conn->tmabort_state == TMABORT_INITIAL) {
+ conn->tmabort_state = TMABORT_TIMEDOUT;
+ debug_scsi("tmabort timedout [sc %p itt 0x%x]\n",
+ ctask->sc, ctask->itt);
+ /* unblock eh_abort() */
+ wake_up(&conn->ehwait);
+ }
+ spin_unlock(&session->lock);
+}
+
+/* must be called with the mutex lock */
+static int iscsi_exec_abort_task(struct scsi_cmnd *sc,
+ struct iscsi_cmd_task *ctask)
+{
+ struct iscsi_conn *conn = ctask->conn;
+ struct iscsi_session *session = conn->session;
+ struct iscsi_tm *hdr = &conn->tmhdr;
+ int rc;
+
+ /*
+ * ctask timed out but session is OK requests must be serialized.
+ */
+ memset(hdr, 0, sizeof(struct iscsi_tm));
+ hdr->opcode = ISCSI_OP_SCSI_TMFUNC | ISCSI_OP_IMMEDIATE;
+ hdr->flags = ISCSI_TM_FUNC_ABORT_TASK;
+ hdr->flags |= ISCSI_FLAG_CMD_FINAL;
+ memcpy(hdr->lun, ctask->hdr->lun, sizeof(hdr->lun));
+ hdr->rtt = ctask->hdr->itt;
+ hdr->refcmdsn = ctask->hdr->cmdsn;
+
+ rc = iscsi_conn_send_generic(conn, (struct iscsi_hdr *)hdr,
+ NULL, 0);
+ if (rc) {
+ iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
+ debug_scsi("abort sent failure [itt 0x%x] %d", ctask->itt, rc);
+ return rc;
+ }
+
+ debug_scsi("abort sent [itt 0x%x]\n", ctask->itt);
+
+ spin_lock_bh(&session->lock);
+ ctask->mtask = (struct iscsi_mgmt_task *)
+ session->mgmt_cmds[(hdr->itt & ISCSI_ITT_MASK) -
+ ISCSI_MGMT_ITT_OFFSET];
+
+ if (conn->tmabort_state == TMABORT_INITIAL) {
+ conn->tmfcmd_pdus_cnt++;
+ conn->tmabort_timer.expires = 10*HZ + jiffies;
+ conn->tmabort_timer.function = iscsi_tmabort_timedout;
+ conn->tmabort_timer.data = (unsigned long)ctask;
+ add_timer(&conn->tmabort_timer);
+ debug_scsi("abort set timeout [itt 0x%x]", ctask->itt);
+ }
+ spin_unlock_bh(&session->lock);
+ mutex_unlock(&conn->xmitmutex);
+
+ /*
+ * block eh thread until:
+ *
+ * 1) abort response
+ * 2) abort timeout
+ * 3) session is terminated or restarted or userspace has
+ * given up on recovery
+ */
+ wait_event_interruptible(conn->ehwait,
+ sc->SCp.phase != session->age ||
+ session->state != ISCSI_STATE_LOGGED_IN ||
+ conn->tmabort_state != TMABORT_INITIAL ||
+ session->recovery_failed);
+ if (signal_pending(current))
+ flush_signals(current);
+ del_timer_sync(&conn->tmabort_timer);
+
+ mutex_lock(&conn->xmitmutex);
+ return 0;
+}
+
+/*
+ * xmit mutex and session lock must be held
+ */
+#define iscsi_remove_task(tasktype) \
+static struct iscsi_##tasktype * \
+iscsi_remove_##tasktype(struct kfifo *fifo, uint32_t itt) \
+{ \
+ int i, nr_tasks = __kfifo_len(fifo) / sizeof(void*); \
+ struct iscsi_##tasktype *task; \
+ \
+ debug_scsi("searching %d tasks\n", nr_tasks); \
+ \
+ for (i = 0; i < nr_tasks; i++) { \
+ __kfifo_get(fifo, (void*)&task, sizeof(void*)); \
+ debug_scsi("check task %u\n", task->itt); \
+ \
+ if (task->itt == itt) { \
+ debug_scsi("matched task\n"); \
+ break; \
+ } \
+ \
+ __kfifo_put(fifo, (void*)&task, sizeof(void*)); \
+ } \
+ return NULL; \
+}
+
+iscsi_remove_task(mgmt_task);
+iscsi_remove_task(cmd_task);
+
+static int iscsi_ctask_mtask_cleanup(struct iscsi_cmd_task *ctask)
+{
+ struct iscsi_conn *conn = ctask->conn;
+ struct iscsi_session *session = conn->session;
+
+ if (!ctask->mtask)
+ return -EINVAL;
+
+ if (!iscsi_remove_mgmt_task(conn->immqueue, ctask->mtask->itt))
+ list_del(&ctask->mtask->running);
+ __kfifo_put(session->mgmtpool.queue, (void*)&ctask->mtask,
+ sizeof(void*));
+ ctask->mtask = NULL;
+ return 0;
+}
+
+/*
+ * session lock and xmitmutex must be held
+ */
+static void fail_command(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask,
+ int err)
+{
+ struct scsi_cmnd *sc;
+
+ conn->session->tt->cleanup_cmd_task(conn, ctask);
+ iscsi_ctask_mtask_cleanup(ctask);
+
+ sc = ctask->sc;
+ if (!sc)
+ return;
+ sc->result = err;
+ sc->resid = sc->request_bufflen;
+ iscsi_complete_command(conn->session, ctask);
+}
+
+int iscsi_eh_abort(struct scsi_cmnd *sc)
+{
+ struct iscsi_cmd_task *ctask = (struct iscsi_cmd_task *)sc->SCp.ptr;
+ struct iscsi_conn *conn = ctask->conn;
+ struct iscsi_session *session = conn->session;
+ struct iscsi_cmd_task *pending_ctask;
+ int rc;
+
+ conn->eh_abort_cnt++;
+ debug_scsi("aborting [sc %p itt 0x%x]\n", sc, ctask->itt);
+
+ mutex_lock(&conn->xmitmutex);
+ spin_lock_bh(&session->lock);
+
+ /*
+ * If we are not logged in or we have started a new session
+ * then let the host reset code handle this
+ */
+ if (session->state != ISCSI_STATE_LOGGED_IN ||
+ sc->SCp.phase != session->age)
+ goto failed;
+
+ /* ctask completed before time out */
+ if (!ctask->sc)
+ goto success;
+
+ /* what should we do here ? */
+ if (conn->ctask == ctask) {
+ printk(KERN_INFO "sc %p itt 0x%x partially sent. Failing "
+ "abort\n", sc, ctask->itt);
+ goto failed;
+ }
+
+ /* check for the easy pending cmd abort */
+ pending_ctask = iscsi_remove_cmd_task(conn->xmitqueue, ctask->itt);
+ if (pending_ctask) {
+ /* iscsi_tcp queues write transfers on the xmitqueue */
+ if (list_empty(&pending_ctask->running)) {
+ debug_scsi("found pending task\n");
+ goto success;
+ } else
+ __kfifo_put(conn->xmitqueue, (void*)&pending_ctask,
+ sizeof(void*));
+ }
+
+ conn->tmabort_state = TMABORT_INITIAL;
+
+ spin_unlock_bh(&session->lock);
+ rc = iscsi_exec_abort_task(sc, ctask);
+ spin_lock_bh(&session->lock);
+
+ iscsi_ctask_mtask_cleanup(ctask);
+ if (rc || sc->SCp.phase != session->age ||
+ session->state != ISCSI_STATE_LOGGED_IN)
+ goto failed;
+
+ /* ctask completed before tmf abort response */
+ if (!ctask->sc) {
+ debug_scsi("sc completed while abort in progress\n");
+ goto success;
+ }
+
+ if (conn->tmabort_state != TMABORT_SUCCESS) {
+ spin_unlock_bh(&session->lock);
+ iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
+ spin_lock_bh(&session->lock);
+ goto failed;
+ }
+
+success:
+ debug_scsi("abort success [sc %lx itt 0x%x]\n", (long)sc, ctask->itt);
+ spin_unlock_bh(&session->lock);
+
+ /*
+ * clean up task if aborted. we have the xmitmutex so grab
+ * the recv lock as a writer
+ */
+ write_lock_bh(conn->recv_lock);
+ spin_lock(&session->lock);
+ fail_command(conn, ctask, DID_ABORT << 16);
+ spin_unlock(&session->lock);
+ write_unlock_bh(conn->recv_lock);
+
+ mutex_unlock(&conn->xmitmutex);
+ return SUCCESS;
+
+failed:
+ spin_unlock_bh(&session->lock);
+ mutex_unlock(&conn->xmitmutex);
+
+ debug_scsi("abort failed [sc %lx itt 0x%x]\n", (long)sc, ctask->itt);
+ return FAILED;
+}
+EXPORT_SYMBOL_GPL(iscsi_eh_abort);
+
+int
+iscsi_pool_init(struct iscsi_queue *q, int max, void ***items, int item_size)
+{
+ int i;
+
+ *items = kmalloc(max * sizeof(void*), GFP_KERNEL);
+ if (*items == NULL)
+ return -ENOMEM;
+
+ q->max = max;
+ q->pool = kmalloc(max * sizeof(void*), GFP_KERNEL);
+ if (q->pool == NULL) {
+ kfree(*items);
+ return -ENOMEM;
+ }
+
+ q->queue = kfifo_init((void*)q->pool, max * sizeof(void*),
+ GFP_KERNEL, NULL);
+ if (q->queue == ERR_PTR(-ENOMEM)) {
+ kfree(q->pool);
+ kfree(*items);
+ return -ENOMEM;
+ }
+
+ for (i = 0; i < max; i++) {
+ q->pool[i] = kmalloc(item_size, GFP_KERNEL);
+ if (q->pool[i] == NULL) {
+ int j;
+
+ for (j = 0; j < i; j++)
+ kfree(q->pool[j]);
+
+ kfifo_free(q->queue);
+ kfree(q->pool);
+ kfree(*items);
+ return -ENOMEM;
+ }
+ memset(q->pool[i], 0, item_size);
+ (*items)[i] = q->pool[i];
+ __kfifo_put(q->queue, (void*)&q->pool[i], sizeof(void*));
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(iscsi_pool_init);
+
+void iscsi_pool_free(struct iscsi_queue *q, void **items)
+{
+ int i;
+
+ for (i = 0; i < q->max; i++)
+ kfree(items[i]);
+ kfree(q->pool);
+ kfree(items);
+}
+EXPORT_SYMBOL_GPL(iscsi_pool_free);
+
+/*
+ * iSCSI Session's hostdata organization:
+ *
+ * *------------------* <== hostdata_session(host->hostdata)
+ * | ptr to class sess|
+ * |------------------| <== iscsi_hostdata(host->hostdata)
+ * | iscsi_session |
+ * *------------------*
+ */
+
+#define hostdata_privsize(_sz) (sizeof(unsigned long) + _sz + \
+ _sz % sizeof(unsigned long))
+
+#define hostdata_session(_hostdata) (iscsi_ptr(*(unsigned long *)_hostdata))
+
+/**
+ * iscsi_session_setup - create iscsi cls session and host and session
+ * @scsit: scsi transport template
+ * @iscsit: iscsi transport template
+ * @initial_cmdsn: initial CmdSN
+ * @hostno: host no allocated
+ *
+ * This can be used by software iscsi_transports that allocate
+ * a session per scsi host.
+ **/
+struct iscsi_cls_session *
+iscsi_session_setup(struct iscsi_transport *iscsit,
+ struct scsi_transport_template *scsit,
+ int cmd_task_size, int mgmt_task_size,
+ uint32_t initial_cmdsn, uint32_t *hostno)
+{
+ struct Scsi_Host *shost;
+ struct iscsi_session *session;
+ struct iscsi_cls_session *cls_session;
+ int cmd_i;
+
+ shost = scsi_host_alloc(iscsit->host_template,
+ hostdata_privsize(sizeof(*session)));
+ if (!shost)
+ return NULL;
+
+ shost->max_id = 1;
+ shost->max_channel = 0;
+ shost->max_lun = iscsit->max_lun;
+ shost->max_cmd_len = iscsit->max_cmd_len;
+ shost->transportt = scsit;
+ shost->transportt->create_work_queue = 1;
+ *hostno = shost->host_no;
+
+ session = iscsi_hostdata(shost->hostdata);
+ memset(session, 0, sizeof(struct iscsi_session));
+ session->host = shost;
+ session->state = ISCSI_STATE_FREE;
+ session->mgmtpool_max = ISCSI_MGMT_CMDS_MAX;
+ session->cmds_max = ISCSI_XMIT_CMDS_MAX;
+ session->cmdsn = initial_cmdsn;
+ session->exp_cmdsn = initial_cmdsn + 1;
+ session->max_cmdsn = initial_cmdsn + 1;
+ session->max_r2t = 1;
+ session->tt = iscsit;
+
+ /* initialize SCSI PDU commands pool */
+ if (iscsi_pool_init(&session->cmdpool, session->cmds_max,
+ (void***)&session->cmds,
+ cmd_task_size + sizeof(struct iscsi_cmd_task)))
+ goto cmdpool_alloc_fail;
+
+ /* pre-format cmds pool with ITT */
+ for (cmd_i = 0; cmd_i < session->cmds_max; cmd_i++) {
+ struct iscsi_cmd_task *ctask = session->cmds[cmd_i];
+
+ if (cmd_task_size)
+ ctask->dd_data = &ctask[1];
+ ctask->itt = cmd_i;
+ }
+
+ spin_lock_init(&session->lock);
+ INIT_LIST_HEAD(&session->connections);
+
+ /* initialize immediate command pool */
+ if (iscsi_pool_init(&session->mgmtpool, session->mgmtpool_max,
+ (void***)&session->mgmt_cmds,
+ mgmt_task_size + sizeof(struct iscsi_mgmt_task)))
+ goto mgmtpool_alloc_fail;
+
+
+ /* pre-format immediate cmds pool with ITT */
+ for (cmd_i = 0; cmd_i < session->mgmtpool_max; cmd_i++) {
+ struct iscsi_mgmt_task *mtask = session->mgmt_cmds[cmd_i];
+
+ if (mgmt_task_size)
+ mtask->dd_data = &mtask[1];
+ mtask->itt = ISCSI_MGMT_ITT_OFFSET + cmd_i;
+ mtask->data = kmalloc(DEFAULT_MAX_RECV_DATA_SEGMENT_LENGTH,
+ GFP_KERNEL);
+ if (!mtask->data) {
+ int j;
+
+ for (j = 0; j < cmd_i; j++)
+ kfree(session->mgmt_cmds[j]->data);
+ goto immdata_alloc_fail;
+ }
+ }
+
+ if (scsi_add_host(shost, NULL))
+ goto add_host_fail;
+
+ cls_session = iscsi_create_session(shost, iscsit, 0);
+ if (!cls_session)
+ goto cls_session_fail;
+ *(unsigned long*)shost->hostdata = (unsigned long)cls_session;
+
+ return cls_session;
+
+cls_session_fail:
+ scsi_remove_host(shost);
+add_host_fail:
+ for (cmd_i = 0; cmd_i < session->mgmtpool_max; cmd_i++)
+ kfree(session->mgmt_cmds[cmd_i]->data);
+immdata_alloc_fail:
+ iscsi_pool_free(&session->mgmtpool, (void**)session->mgmt_cmds);
+mgmtpool_alloc_fail:
+ iscsi_pool_free(&session->cmdpool, (void**)session->cmds);
+cmdpool_alloc_fail:
+ scsi_host_put(shost);
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(iscsi_session_setup);
+
+/**
+ * iscsi_session_teardown - destroy session, host, and cls_session
+ * shost: scsi host
+ *
+ * This can be used by software iscsi_transports that allocate
+ * a session per scsi host.
+ **/
+void iscsi_session_teardown(struct iscsi_cls_session *cls_session)
+{
+ struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
+ struct iscsi_session *session = iscsi_hostdata(shost->hostdata);
+ int cmd_i;
+
+ scsi_remove_host(shost);
+
+ for (cmd_i = 0; cmd_i < session->mgmtpool_max; cmd_i++)
+ kfree(session->mgmt_cmds[cmd_i]->data);
+
+ iscsi_pool_free(&session->mgmtpool, (void**)session->mgmt_cmds);
+ iscsi_pool_free(&session->cmdpool, (void**)session->cmds);
+
+ iscsi_destroy_session(cls_session);
+ scsi_host_put(shost);
+}
+EXPORT_SYMBOL_GPL(iscsi_session_teardown);
+
+/**
+ * iscsi_conn_setup - create iscsi_cls_conn and iscsi_conn
+ * @cls_session: iscsi_cls_session
+ * @conn_idx: cid
+ **/
+struct iscsi_cls_conn *
+iscsi_conn_setup(struct iscsi_cls_session *cls_session, uint32_t conn_idx)
+{
+ struct iscsi_session *session = class_to_transport_session(cls_session);
+ struct iscsi_conn *conn;
+ struct iscsi_cls_conn *cls_conn;
+
+ cls_conn = iscsi_create_conn(cls_session, conn_idx);
+ if (!cls_conn)
+ return NULL;
+ conn = cls_conn->dd_data;
+ memset(conn, 0, sizeof(*conn));
+
+ conn->session = session;
+ conn->cls_conn = cls_conn;
+ conn->c_stage = ISCSI_CONN_INITIAL_STAGE;
+ conn->id = conn_idx;
+ conn->exp_statsn = 0;
+ conn->tmabort_state = TMABORT_INITIAL;
+ INIT_LIST_HEAD(&conn->run_list);
+ INIT_LIST_HEAD(&conn->mgmt_run_list);
+
+ /* initialize general xmit PDU commands queue */
+ conn->xmitqueue = kfifo_alloc(session->cmds_max * sizeof(void*),
+ GFP_KERNEL, NULL);
+ if (conn->xmitqueue == ERR_PTR(-ENOMEM))
+ goto xmitqueue_alloc_fail;
+
+ /* initialize general immediate & non-immediate PDU commands queue */
+ conn->immqueue = kfifo_alloc(session->mgmtpool_max * sizeof(void*),
+ GFP_KERNEL, NULL);
+ if (conn->immqueue == ERR_PTR(-ENOMEM))
+ goto immqueue_alloc_fail;
+
+ conn->mgmtqueue = kfifo_alloc(session->mgmtpool_max * sizeof(void*),
+ GFP_KERNEL, NULL);
+ if (conn->mgmtqueue == ERR_PTR(-ENOMEM))
+ goto mgmtqueue_alloc_fail;
+
+ INIT_WORK(&conn->xmitwork, iscsi_xmitworker, conn);
+
+ /* allocate login_mtask used for the login/text sequences */
+ spin_lock_bh(&session->lock);
+ if (!__kfifo_get(session->mgmtpool.queue,
+ (void*)&conn->login_mtask,
+ sizeof(void*))) {
+ spin_unlock_bh(&session->lock);
+ goto login_mtask_alloc_fail;
+ }
+ spin_unlock_bh(&session->lock);
+
+ init_timer(&conn->tmabort_timer);
+ mutex_init(&conn->xmitmutex);
+ init_waitqueue_head(&conn->ehwait);
+
+ return cls_conn;
+
+login_mtask_alloc_fail:
+ kfifo_free(conn->mgmtqueue);
+mgmtqueue_alloc_fail:
+ kfifo_free(conn->immqueue);
+immqueue_alloc_fail:
+ kfifo_free(conn->xmitqueue);
+xmitqueue_alloc_fail:
+ iscsi_destroy_conn(cls_conn);
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(iscsi_conn_setup);
+
+/**
+ * iscsi_conn_teardown - teardown iscsi connection
+ * cls_conn: iscsi class connection
+ *
+ * TODO: we may need to make this into a two step process
+ * like scsi-mls remove + put host
+ */
+void iscsi_conn_teardown(struct iscsi_cls_conn *cls_conn)
+{
+ struct iscsi_conn *conn = cls_conn->dd_data;
+ struct iscsi_session *session = conn->session;
+ unsigned long flags;
+
+ mutex_lock(&conn->xmitmutex);
+ set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
+ if (conn->c_stage == ISCSI_CONN_INITIAL_STAGE) {
+ if (session->tt->suspend_conn_recv)
+ session->tt->suspend_conn_recv(conn);
+
+ session->tt->terminate_conn(conn);
+ }
+
+ spin_lock_bh(&session->lock);
+ conn->c_stage = ISCSI_CONN_CLEANUP_WAIT;
+ if (session->leadconn == conn) {
+ /*
+ * leading connection? then give up on recovery.
+ */
+ session->state = ISCSI_STATE_TERMINATE;
+ wake_up(&conn->ehwait);
+ }
+ spin_unlock_bh(&session->lock);
+
+ mutex_unlock(&conn->xmitmutex);
+
+ /*
+ * Block until all in-progress commands for this connection
+ * time out or fail.
+ */
+ for (;;) {
+ spin_lock_irqsave(session->host->host_lock, flags);
+ if (!session->host->host_busy) { /* OK for ERL == 0 */
+ spin_unlock_irqrestore(session->host->host_lock, flags);
+ break;
+ }
+ spin_unlock_irqrestore(session->host->host_lock, flags);
+ msleep_interruptible(500);
+ printk("conn_destroy(): host_busy %d host_failed %d\n",
+ session->host->host_busy, session->host->host_failed);
+ /*
+ * force eh_abort() to unblock
+ */
+ wake_up(&conn->ehwait);
+ }
+
+ spin_lock_bh(&session->lock);
+ __kfifo_put(session->mgmtpool.queue, (void*)&conn->login_mtask,
+ sizeof(void*));
+ list_del(&conn->item);
+ if (list_empty(&session->connections))
+ session->leadconn = NULL;
+ if (session->leadconn && session->leadconn == conn)
+ session->leadconn = container_of(session->connections.next,
+ struct iscsi_conn, item);
+
+ if (session->leadconn == NULL)
+ /* no connections exits.. reset sequencing */
+ session->cmdsn = session->max_cmdsn = session->exp_cmdsn = 1;
+ spin_unlock_bh(&session->lock);
+
+ kfifo_free(conn->xmitqueue);
+ kfifo_free(conn->immqueue);
+ kfifo_free(conn->mgmtqueue);
+
+ iscsi_destroy_conn(cls_conn);
+}
+EXPORT_SYMBOL_GPL(iscsi_conn_teardown);
+
+int iscsi_conn_start(struct iscsi_cls_conn *cls_conn)
+{
+ struct iscsi_conn *conn = cls_conn->dd_data;
+ struct iscsi_session *session = conn->session;
+
+ if (session == NULL) {
+ printk(KERN_ERR "iscsi: can't start unbound connection\n");
+ return -EPERM;
+ }
+
+ spin_lock_bh(&session->lock);
+ conn->c_stage = ISCSI_CONN_STARTED;
+ session->state = ISCSI_STATE_LOGGED_IN;
+
+ switch(conn->stop_stage) {
+ case STOP_CONN_RECOVER:
+ /*
+ * unblock eh_abort() if it is blocked. re-try all
+ * commands after successful recovery
+ */
+ session->conn_cnt++;
+ conn->stop_stage = 0;
+ conn->tmabort_state = TMABORT_INITIAL;
+ session->age++;
+ session->recovery_failed = 0;
+ spin_unlock_bh(&session->lock);
+
+ iscsi_unblock_session(session_to_cls(session));
+ wake_up(&conn->ehwait);
+ return 0;
+ case STOP_CONN_TERM:
+ session->conn_cnt++;
+ conn->stop_stage = 0;
+ break;
+ case STOP_CONN_SUSPEND:
+ conn->stop_stage = 0;
+ clear_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx);
+ clear_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
+ break;
+ default:
+ break;
+ }
+ spin_unlock_bh(&session->lock);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(iscsi_conn_start);
+
+static void
+flush_control_queues(struct iscsi_session *session, struct iscsi_conn *conn)
+{
+ struct iscsi_mgmt_task *mtask, *tmp;
+
+ /* handle pending */
+ while (__kfifo_get(conn->immqueue, (void*)&mtask, sizeof(void*)) ||
+ __kfifo_get(conn->mgmtqueue, (void*)&mtask, sizeof(void*))) {
+ if (mtask == conn->login_mtask)
+ continue;
+ debug_scsi("flushing pending mgmt task itt 0x%x\n", mtask->itt);
+ __kfifo_put(session->mgmtpool.queue, (void*)&mtask,
+ sizeof(void*));
+ }
+
+ /* handle running */
+ list_for_each_entry_safe(mtask, tmp, &conn->mgmt_run_list, running) {
+ debug_scsi("flushing running mgmt task itt 0x%x\n", mtask->itt);
+ if (mtask == conn->login_mtask)
+ continue;
+ list_del(&mtask->running);
+ __kfifo_put(session->mgmtpool.queue, (void*)&conn->mtask,
+ sizeof(void*));
+ }
+
+ conn->mtask = NULL;
+}
+
+/* Fail commands. Mutex and session lock held and recv side suspended */
+static void fail_all_commands(struct iscsi_conn *conn)
+{
+ struct iscsi_cmd_task *ctask, *tmp;
+
+ /* flush pending */
+ while (__kfifo_get(conn->xmitqueue, (void*)&ctask, sizeof(void*))) {
+ debug_scsi("failing pending sc %p itt 0x%x\n", ctask->sc,
+ ctask->itt);
+ fail_command(conn, ctask, DID_BUS_BUSY << 16);
+ }
+
+ /* fail all other running */
+ list_for_each_entry_safe(ctask, tmp, &conn->run_list, running) {
+ debug_scsi("failing in progress sc %p itt 0x%x\n",
+ ctask->sc, ctask->itt);
+ fail_command(conn, ctask, DID_BUS_BUSY << 16);
+ }
+
+ conn->ctask = NULL;
+}
+
+void iscsi_start_session_recovery(struct iscsi_session *session,
+ struct iscsi_conn *conn, int flag)
+{
+ spin_lock_bh(&session->lock);
+ if (conn->stop_stage == STOP_CONN_RECOVER ||
+ conn->stop_stage == STOP_CONN_TERM) {
+ spin_unlock_bh(&session->lock);
+ return;
+ }
+ conn->stop_stage = flag;
+ spin_unlock_bh(&session->lock);
+
+ if (session->tt->suspend_conn_recv)
+ session->tt->suspend_conn_recv(conn);
+
+ mutex_lock(&conn->xmitmutex);
+ spin_lock_bh(&session->lock);
+ conn->c_stage = ISCSI_CONN_STOPPED;
+ set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
+
+ session->conn_cnt--;
+ if (session->conn_cnt == 0 || session->leadconn == conn)
+ session->state = ISCSI_STATE_FAILED;
+
+ spin_unlock_bh(&session->lock);
+
+ session->tt->terminate_conn(conn);
+ /*
+ * flush queues.
+ */
+ spin_lock_bh(&session->lock);
+ fail_all_commands(conn);
+ flush_control_queues(session, conn);
+ spin_unlock_bh(&session->lock);
+
+ /*
+ * for connection level recovery we should not calculate
+ * header digest. conn->hdr_size used for optimization
+ * in hdr_extract() and will be re-negotiated at
+ * set_param() time.
+ */
+ if (flag == STOP_CONN_RECOVER) {
+ conn->hdrdgst_en = 0;
+ conn->datadgst_en = 0;
+
+ if (session->state == ISCSI_STATE_FAILED)
+ iscsi_block_session(session_to_cls(session));
+ }
+ mutex_unlock(&conn->xmitmutex);
+}
+EXPORT_SYMBOL_GPL(iscsi_start_session_recovery);
+
+void iscsi_conn_stop(struct iscsi_cls_conn *cls_conn, int flag)
+{
+ struct iscsi_conn *conn = cls_conn->dd_data;
+ struct iscsi_session *session = conn->session;
+
+ switch (flag) {
+ case STOP_CONN_RECOVER:
+ case STOP_CONN_TERM:
+ iscsi_start_session_recovery(session, conn, flag);
+ return;
+ case STOP_CONN_SUSPEND:
+ if (session->tt->suspend_conn_recv)
+ session->tt->suspend_conn_recv(conn);
+
+ mutex_lock(&conn->xmitmutex);
+ spin_lock_bh(&session->lock);
+
+ conn->stop_stage = flag;
+ conn->c_stage = ISCSI_CONN_STOPPED;
+ set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
+
+ spin_unlock_bh(&session->lock);
+ mutex_unlock(&conn->xmitmutex);
+ break;
+ default:
+ printk(KERN_ERR "invalid stop flag %d\n", flag);
+ }
+}
+EXPORT_SYMBOL_GPL(iscsi_conn_stop);
+
+int iscsi_conn_bind(struct iscsi_cls_session *cls_session,
+ struct iscsi_cls_conn *cls_conn, int is_leading)
+{
+ struct iscsi_session *session = class_to_transport_session(cls_session);
+ struct iscsi_conn *tmp = ERR_PTR(-EEXIST), *conn = cls_conn->dd_data;
+
+ /* lookup for existing connection */
+ spin_lock_bh(&session->lock);
+ list_for_each_entry(tmp, &session->connections, item) {
+ if (tmp == conn) {
+ if (conn->c_stage != ISCSI_CONN_STOPPED ||
+ conn->stop_stage == STOP_CONN_TERM) {
+ printk(KERN_ERR "iscsi_tcp: can't bind "
+ "non-stopped connection (%d:%d)\n",
+ conn->c_stage, conn->stop_stage);
+ spin_unlock_bh(&session->lock);
+ return -EIO;
+ }
+ break;
+ }
+ }
+ if (tmp != conn) {
+ /* bind new iSCSI connection to session */
+ conn->session = session;
+ list_add(&conn->item, &session->connections);
+ }
+ spin_unlock_bh(&session->lock);
+
+ if (is_leading)
+ session->leadconn = conn;
+
+ /*
+ * Unblock xmitworker(), Login Phase will pass through.
+ */
+ clear_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx);
+ clear_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(iscsi_conn_bind);
+
+MODULE_AUTHOR("Mike Christie");
+MODULE_DESCRIPTION("iSCSI library functions");
+MODULE_LICENSE("GPL");
diff --git a/drivers/scsi/scsi_devinfo.c b/drivers/scsi/scsi_devinfo.c
index c750d33..ae13e4a 100644
--- a/drivers/scsi/scsi_devinfo.c
+++ b/drivers/scsi/scsi_devinfo.c
@@ -157,6 +157,8 @@
{"HITACHI", "DF400", "*", BLIST_SPARSELUN},
{"HITACHI", "DF500", "*", BLIST_SPARSELUN},
{"HITACHI", "DF600", "*", BLIST_SPARSELUN},
+ {"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_ATTACH_PQ3 | BLIST_SPARSELUN | BLIST_LARGELUN},
+ {"HITACHI", "OPEN-E", "*", BLIST_ATTACH_PQ3 | BLIST_SPARSELUN | BLIST_LARGELUN},
{"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP VA7400 */
{"HP", "OPEN-", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP XP Arrays */
{"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index 1a5474b..5c7e51f 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -816,6 +816,29 @@
put_device(&sdev->sdev_gendev);
}
+/**
+ * scsi_inq_str - print INQUIRY data from min to max index,
+ * strip trailing whitespace
+ * @buf: Output buffer with at least end-first+1 bytes of space
+ * @inq: Inquiry buffer (input)
+ * @first: Offset of string into inq
+ * @end: Index after last character in inq
+ */
+static unsigned char* scsi_inq_str(unsigned char* buf, unsigned char *inq,
+ unsigned first, unsigned end)
+{
+ unsigned term = 0, idx;
+ for (idx = 0; idx+first < end && idx+first < inq[4]+5; ++idx) {
+ if (inq[idx+first] > 0x20) {
+ buf[idx] = inq[idx+first];
+ term = idx+1;
+ } else {
+ buf[idx] = ' ';
+ }
+ }
+ buf[term] = 0;
+ return buf;
+}
/**
* scsi_probe_and_add_lun - probe a LUN, if a LUN is found add it
@@ -880,10 +903,12 @@
if (scsi_probe_lun(sdev, result, result_len, &bflags))
goto out_free_result;
+ if (bflagsp)
+ *bflagsp = bflags;
/*
* result contains valid SCSI INQUIRY data.
*/
- if ((result[0] >> 5) == 3) {
+ if (((result[0] >> 5) == 3) && !(bflags & BLIST_ATTACH_PQ3)) {
/*
* For a Peripheral qualifier 3 (011b), the SCSI
* spec says: The device server is not capable of
@@ -894,9 +919,18 @@
* logical disk configured at sdev->lun, but there
* is a target id responding.
*/
- SCSI_LOG_SCAN_BUS(3, printk(KERN_INFO
- "scsi scan: peripheral qualifier of 3,"
- " no device added\n"));
+ SCSI_LOG_SCAN_BUS(2, sdev_printk(KERN_INFO, sdev, "scsi scan:"
+ " peripheral qualifier of 3, device not"
+ " added\n"))
+ if (lun == 0) {
+ unsigned char vend[9], mod[17];
+ SCSI_LOG_SCAN_BUS(1, sdev_printk(KERN_INFO, sdev,
+ "scsi scan: consider passing scsi_mod."
+ "dev_flags=%s:%s:0x240 or 0x800240\n",
+ scsi_inq_str(vend, result, 8, 16),
+ scsi_inq_str(mod, result, 16, 32)));
+ }
+
res = SCSI_SCAN_TARGET_PRESENT;
goto out_free_result;
}
@@ -920,8 +954,6 @@
sdev->lockable = 0;
scsi_unlock_floptical(sdev, result);
}
- if (bflagsp)
- *bflagsp = bflags;
}
out_free_result:
@@ -946,7 +978,6 @@
* scsi_sequential_lun_scan - sequentially scan a SCSI target
* @starget: pointer to target structure to scan
* @bflags: black/white list flag for LUN 0
- * @lun0_res: result of scanning LUN 0
*
* Description:
* Generally, scan from LUN 1 (LUN 0 is assumed to already have been
@@ -956,8 +987,7 @@
* Modifies sdevscan->lun.
**/
static void scsi_sequential_lun_scan(struct scsi_target *starget,
- int bflags, int lun0_res, int scsi_level,
- int rescan)
+ int bflags, int scsi_level, int rescan)
{
unsigned int sparse_lun, lun, max_dev_lun;
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
@@ -978,13 +1008,6 @@
sparse_lun = 0;
/*
- * If not sparse lun and no device attached at LUN 0 do not scan
- * any further.
- */
- if (!sparse_lun && (lun0_res != SCSI_SCAN_LUN_PRESENT))
- return;
-
- /*
* If less than SCSI_1_CSS, and no special lun scaning, stop
* scanning; this matches 2.4 behaviour, but could just be a bug
* (to continue scanning a SCSI_1_CSS device).
@@ -1395,7 +1418,7 @@
* do a sequential scan.
*/
scsi_sequential_lun_scan(starget, bflags,
- res, starget->scsi_level, rescan);
+ starget->scsi_level, rescan);
}
out_reap:
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index 2730d50..bc9071d 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -31,31 +31,25 @@
#include <scsi/scsi_transport_iscsi.h>
#include <scsi/iscsi_if.h>
-#define ISCSI_SESSION_ATTRS 8
-#define ISCSI_CONN_ATTRS 6
+#define ISCSI_SESSION_ATTRS 11
+#define ISCSI_CONN_ATTRS 10
+#define ISCSI_HOST_ATTRS 0
struct iscsi_internal {
struct scsi_transport_template t;
struct iscsi_transport *iscsi_transport;
struct list_head list;
- /*
- * based on transport capabilities, at register time we set these
- * bits to tell the transport class it wants attributes displayed
- * in sysfs or that it can support different iSCSI Data-Path
- * capabilities
- */
- uint32_t param_mask;
-
struct class_device cdev;
- /*
- * We do not have any private or other attrs.
- */
+
+ struct class_device_attribute *host_attrs[ISCSI_HOST_ATTRS + 1];
struct transport_container conn_cont;
struct class_device_attribute *conn_attrs[ISCSI_CONN_ATTRS + 1];
struct transport_container session_cont;
struct class_device_attribute *session_attrs[ISCSI_SESSION_ATTRS + 1];
};
+static int iscsi_session_nr; /* sysfs session id for next new session */
+
/*
* list of registered transports and lock that must
* be held while accessing list. The iscsi_transport_lock must
@@ -120,6 +114,24 @@
.attrs = iscsi_transport_attrs,
};
+static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
+ struct class_device *cdev)
+{
+ struct Scsi_Host *shost = dev_to_shost(dev);
+ struct iscsi_host *ihost = shost->shost_data;
+
+ memset(ihost, 0, sizeof(*ihost));
+ INIT_LIST_HEAD(&ihost->sessions);
+ mutex_init(&ihost->mutex);
+ return 0;
+}
+
+static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
+ "iscsi_host",
+ iscsi_setup_host,
+ NULL,
+ NULL);
+
static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
"iscsi_session",
NULL,
@@ -165,14 +177,23 @@
static LIST_HEAD(connlist);
static DEFINE_SPINLOCK(connlock);
-static struct iscsi_cls_session *iscsi_session_lookup(uint64_t handle)
+static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)
+{
+ struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent);
+ return sess->sid;
+}
+
+/*
+ * Returns the matching session to a given sid
+ */
+static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)
{
unsigned long flags;
struct iscsi_cls_session *sess;
spin_lock_irqsave(&sesslock, flags);
list_for_each_entry(sess, &sesslist, sess_list) {
- if (sess == iscsi_ptr(handle)) {
+ if (sess->sid == sid) {
spin_unlock_irqrestore(&sesslock, flags);
return sess;
}
@@ -181,14 +202,17 @@
return NULL;
}
-static struct iscsi_cls_conn *iscsi_conn_lookup(uint64_t handle)
+/*
+ * Returns the matching connection to a given sid / cid tuple
+ */
+static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
{
unsigned long flags;
struct iscsi_cls_conn *conn;
spin_lock_irqsave(&connlock, flags);
list_for_each_entry(conn, &connlist, conn_list) {
- if (conn == iscsi_ptr(handle)) {
+ if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {
spin_unlock_irqrestore(&connlock, flags);
return conn;
}
@@ -209,6 +233,7 @@
shost = iscsi_session_to_shost(session);
scsi_host_put(shost);
+ kfree(session->targetname);
kfree(session);
module_put(transport->owner);
}
@@ -218,30 +243,95 @@
return dev->release == iscsi_session_release;
}
+static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
+ uint id, uint lun)
+{
+ struct iscsi_host *ihost = shost->shost_data;
+ struct iscsi_cls_session *session;
+
+ mutex_lock(&ihost->mutex);
+ list_for_each_entry(session, &ihost->sessions, host_list) {
+ if ((channel == SCAN_WILD_CARD ||
+ channel == session->channel) &&
+ (id == SCAN_WILD_CARD || id == session->target_id))
+ scsi_scan_target(&session->dev, session->channel,
+ session->target_id, lun, 1);
+ }
+ mutex_unlock(&ihost->mutex);
+
+ return 0;
+}
+
+static void session_recovery_timedout(void *data)
+{
+ struct iscsi_cls_session *session = data;
+
+ dev_printk(KERN_INFO, &session->dev, "session recovery timed out "
+ "after %d secs\n", session->recovery_tmo);
+
+ if (session->transport->session_recovery_timedout)
+ session->transport->session_recovery_timedout(session);
+
+ scsi_target_unblock(&session->dev);
+}
+
+void iscsi_unblock_session(struct iscsi_cls_session *session)
+{
+ if (!cancel_delayed_work(&session->recovery_work))
+ flush_scheduled_work();
+ scsi_target_unblock(&session->dev);
+}
+EXPORT_SYMBOL_GPL(iscsi_unblock_session);
+
+void iscsi_block_session(struct iscsi_cls_session *session)
+{
+ scsi_target_block(&session->dev);
+ schedule_delayed_work(&session->recovery_work,
+ session->recovery_tmo * HZ);
+}
+EXPORT_SYMBOL_GPL(iscsi_block_session);
+
/**
* iscsi_create_session - create iscsi class session
* @shost: scsi host
* @transport: iscsi transport
*
- * This can be called from a LLD or iscsi_transport
+ * This can be called from a LLD or iscsi_transport.
**/
struct iscsi_cls_session *
-iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport)
+iscsi_create_session(struct Scsi_Host *shost,
+ struct iscsi_transport *transport, int channel)
{
+ struct iscsi_host *ihost;
struct iscsi_cls_session *session;
int err;
if (!try_module_get(transport->owner))
return NULL;
- session = kzalloc(sizeof(*session), GFP_KERNEL);
+ session = kzalloc(sizeof(*session) + transport->sessiondata_size,
+ GFP_KERNEL);
if (!session)
goto module_put;
session->transport = transport;
+ session->recovery_tmo = 120;
+ INIT_WORK(&session->recovery_work, session_recovery_timedout, session);
+ INIT_LIST_HEAD(&session->host_list);
+ INIT_LIST_HEAD(&session->sess_list);
+
+ if (transport->sessiondata_size)
+ session->dd_data = &session[1];
/* this is released in the dev's release function */
scsi_host_get(shost);
- snprintf(session->dev.bus_id, BUS_ID_SIZE, "session%u", shost->host_no);
+ ihost = shost->shost_data;
+
+ session->sid = iscsi_session_nr++;
+ session->channel = channel;
+ session->target_id = ihost->next_target_id++;
+
+ snprintf(session->dev.bus_id, BUS_ID_SIZE, "session%u",
+ session->sid);
session->dev.parent = &shost->shost_gendev;
session->dev.release = iscsi_session_release;
err = device_register(&session->dev);
@@ -252,6 +342,10 @@
}
transport_register_device(&session->dev);
+ mutex_lock(&ihost->mutex);
+ list_add(&session->host_list, &ihost->sessions);
+ mutex_unlock(&ihost->mutex);
+
return session;
free_session:
@@ -272,6 +366,16 @@
**/
int iscsi_destroy_session(struct iscsi_cls_session *session)
{
+ struct Scsi_Host *shost = iscsi_session_to_shost(session);
+ struct iscsi_host *ihost = shost->shost_data;
+
+ if (!cancel_delayed_work(&session->recovery_work))
+ flush_scheduled_work();
+
+ mutex_lock(&ihost->mutex);
+ list_del(&session->host_list);
+ mutex_unlock(&ihost->mutex);
+
transport_unregister_device(&session->dev);
device_unregister(&session->dev);
return 0;
@@ -284,6 +388,7 @@
struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
struct device *parent = conn->dev.parent;
+ kfree(conn->persistent_address);
kfree(conn);
put_device(parent);
}
@@ -301,12 +406,16 @@
* This can be called from a LLD or iscsi_transport. The connection
* is child of the session so cid must be unique for all connections
* on the session.
+ *
+ * Since we do not support MCS, cid will normally be zero. In some cases
+ * for software iscsi we could be trying to preallocate a connection struct
+ * in which case there could be two connection structs and cid would be
+ * non-zero.
**/
struct iscsi_cls_conn *
iscsi_create_conn(struct iscsi_cls_session *session, uint32_t cid)
{
struct iscsi_transport *transport = session->transport;
- struct Scsi_Host *shost = iscsi_session_to_shost(session);
struct iscsi_cls_conn *conn;
int err;
@@ -319,12 +428,14 @@
INIT_LIST_HEAD(&conn->conn_list);
conn->transport = transport;
+ conn->cid = cid;
/* this is released in the dev's release function */
if (!get_device(&session->dev))
goto free_conn;
+
snprintf(conn->dev.bus_id, BUS_ID_SIZE, "connection%d:%u",
- shost->host_no, cid);
+ session->sid, cid);
conn->dev.parent = &session->dev;
conn->dev.release = iscsi_conn_release;
err = device_register(&conn->dev);
@@ -361,105 +472,6 @@
EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
/*
- * These functions are used only by software iscsi_transports
- * which do not allocate and more their scsi_hosts since this
- * is initiated from userspace.
- */
-
-/*
- * iSCSI Session's hostdata organization:
- *
- * *------------------* <== hostdata_session(host->hostdata)
- * | ptr to class sess|
- * |------------------| <== iscsi_hostdata(host->hostdata)
- * | transport's data |
- * *------------------*
- */
-
-#define hostdata_privsize(_t) (sizeof(unsigned long) + _t->hostdata_size + \
- _t->hostdata_size % sizeof(unsigned long))
-
-#define hostdata_session(_hostdata) (iscsi_ptr(*(unsigned long *)_hostdata))
-
-/**
- * iscsi_transport_create_session - create iscsi cls session and host
- * scsit: scsi transport template
- * transport: iscsi transport template
- *
- * This can be used by software iscsi_transports that allocate
- * a session per scsi host.
- **/
-struct Scsi_Host *
-iscsi_transport_create_session(struct scsi_transport_template *scsit,
- struct iscsi_transport *transport)
-{
- struct iscsi_cls_session *session;
- struct Scsi_Host *shost;
- unsigned long flags;
-
- shost = scsi_host_alloc(transport->host_template,
- hostdata_privsize(transport));
- if (!shost) {
- printk(KERN_ERR "iscsi: can not allocate SCSI host for "
- "session\n");
- return NULL;
- }
-
- shost->max_id = 1;
- shost->max_channel = 0;
- shost->max_lun = transport->max_lun;
- shost->max_cmd_len = transport->max_cmd_len;
- shost->transportt = scsit;
- shost->transportt->create_work_queue = 1;
-
- if (scsi_add_host(shost, NULL))
- goto free_host;
-
- session = iscsi_create_session(shost, transport);
- if (!session)
- goto remove_host;
-
- *(unsigned long*)shost->hostdata = (unsigned long)session;
- spin_lock_irqsave(&sesslock, flags);
- list_add(&session->sess_list, &sesslist);
- spin_unlock_irqrestore(&sesslock, flags);
- return shost;
-
-remove_host:
- scsi_remove_host(shost);
-free_host:
- scsi_host_put(shost);
- return NULL;
-}
-
-EXPORT_SYMBOL_GPL(iscsi_transport_create_session);
-
-/**
- * iscsi_transport_destroy_session - destroy session and scsi host
- * shost: scsi host
- *
- * This can be used by software iscsi_transports that allocate
- * a session per scsi host.
- **/
-int iscsi_transport_destroy_session(struct Scsi_Host *shost)
-{
- struct iscsi_cls_session *session;
- unsigned long flags;
-
- scsi_remove_host(shost);
- session = hostdata_session(shost->hostdata);
- spin_lock_irqsave(&sesslock, flags);
- list_del(&session->sess_list);
- spin_unlock_irqrestore(&sesslock, flags);
- iscsi_destroy_session(session);
- /* ref from host alloc */
- scsi_host_put(shost);
- return 0;
-}
-
-EXPORT_SYMBOL_GPL(iscsi_transport_destroy_session);
-
-/*
* iscsi interface functions
*/
static struct iscsi_internal *
@@ -574,6 +586,7 @@
}
spin_lock_irqsave(&zone->freelock, flags);
+ INIT_LIST_HEAD(skb_to_lh(skb));
list_add(skb_to_lh(skb), &zone->freequeue);
spin_unlock_irqrestore(&zone->freelock, flags);
@@ -607,7 +620,8 @@
ev->type = ISCSI_KEVENT_RECV_PDU;
if (atomic_read(&conn->z_pdu->allocated) >= conn->z_pdu->hiwat)
ev->iferror = -ENOMEM;
- ev->r.recv_req.conn_handle = iscsi_handle(conn);
+ ev->r.recv_req.cid = conn->cid;
+ ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
pdu = (char*)ev + sizeof(*ev);
memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
@@ -639,7 +653,8 @@
if (atomic_read(&conn->z_error->allocated) >= conn->z_error->hiwat)
ev->iferror = -ENOMEM;
ev->r.connerror.error = error;
- ev->r.connerror.conn_handle = iscsi_handle(conn);
+ ev->r.connerror.cid = conn->cid;
+ ev->r.connerror.sid = iscsi_conn_get_sid(conn);
iscsi_unicast_skb(conn->z_error, skb);
@@ -689,7 +704,7 @@
ISCSI_STATS_CUSTOM_MAX);
int err = 0;
- conn = iscsi_conn_lookup(ev->u.get_stats.conn_handle);
+ conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
if (!conn)
return -EEXIST;
@@ -713,8 +728,10 @@
evstat->type = nlh->nlmsg_type;
if (atomic_read(&conn->z_pdu->allocated) >= conn->z_pdu->hiwat)
evstat->iferror = -ENOMEM;
- evstat->u.get_stats.conn_handle =
- ev->u.get_stats.conn_handle;
+ evstat->u.get_stats.cid =
+ ev->u.get_stats.cid;
+ evstat->u.get_stats.sid =
+ ev->u.get_stats.sid;
stats = (struct iscsi_stats *)
((char*)evstat + sizeof(*evstat));
memset(stats, 0, sizeof(*stats));
@@ -740,16 +757,21 @@
{
struct iscsi_transport *transport = priv->iscsi_transport;
struct iscsi_cls_session *session;
- uint32_t sid;
+ unsigned long flags;
+ uint32_t hostno;
- session = transport->create_session(&priv->t,
+ session = transport->create_session(transport, &priv->t,
ev->u.c_session.initial_cmdsn,
- &sid);
+ &hostno);
if (!session)
return -ENOMEM;
- ev->r.c_session_ret.session_handle = iscsi_handle(session);
- ev->r.c_session_ret.sid = sid;
+ spin_lock_irqsave(&sesslock, flags);
+ list_add(&session->sess_list, &sesslist);
+ spin_unlock_irqrestore(&sesslock, flags);
+
+ ev->r.c_session_ret.host_no = hostno;
+ ev->r.c_session_ret.sid = session->sid;
return 0;
}
@@ -760,13 +782,20 @@
struct iscsi_cls_session *session;
unsigned long flags;
- session = iscsi_session_lookup(ev->u.c_conn.session_handle);
- if (!session)
+ session = iscsi_session_lookup(ev->u.c_conn.sid);
+ if (!session) {
+ printk(KERN_ERR "iscsi: invalid session %d\n",
+ ev->u.c_conn.sid);
return -EINVAL;
+ }
conn = transport->create_conn(session, ev->u.c_conn.cid);
- if (!conn)
+ if (!conn) {
+ printk(KERN_ERR "iscsi: couldn't create a new "
+ "connection for session %d\n",
+ session->sid);
return -ENOMEM;
+ }
conn->z_pdu = mempool_zone_init(Z_MAX_PDU,
NLMSG_SPACE(sizeof(struct iscsi_uevent) +
@@ -788,7 +817,8 @@
goto free_pdu_pool;
}
- ev->r.handle = iscsi_handle(conn);
+ ev->r.c_conn_ret.sid = session->sid;
+ ev->r.c_conn_ret.cid = conn->cid;
spin_lock_irqsave(&connlock, flags);
list_add(&conn->conn_list, &connlist);
@@ -812,7 +842,7 @@
struct iscsi_cls_conn *conn;
struct mempool_zone *z_error, *z_pdu;
- conn = iscsi_conn_lookup(ev->u.d_conn.conn_handle);
+ conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
if (!conn)
return -EINVAL;
spin_lock_irqsave(&connlock, flags);
@@ -832,6 +862,72 @@
return 0;
}
+static void
+iscsi_copy_param(struct iscsi_uevent *ev, uint32_t *value, char *data)
+{
+ if (ev->u.set_param.len != sizeof(uint32_t))
+ BUG();
+ memcpy(value, data, min_t(uint32_t, sizeof(uint32_t),
+ ev->u.set_param.len));
+}
+
+static int
+iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
+{
+ char *data = (char*)ev + sizeof(*ev);
+ struct iscsi_cls_conn *conn;
+ struct iscsi_cls_session *session;
+ int err = 0;
+ uint32_t value = 0;
+
+ session = iscsi_session_lookup(ev->u.set_param.sid);
+ conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
+ if (!conn || !session)
+ return -EINVAL;
+
+ switch (ev->u.set_param.param) {
+ case ISCSI_PARAM_SESS_RECOVERY_TMO:
+ iscsi_copy_param(ev, &value, data);
+ if (value != 0)
+ session->recovery_tmo = value;
+ break;
+ case ISCSI_PARAM_TARGET_NAME:
+ /* this should not change between logins */
+ if (session->targetname)
+ return 0;
+
+ session->targetname = kstrdup(data, GFP_KERNEL);
+ if (!session->targetname)
+ return -ENOMEM;
+ break;
+ case ISCSI_PARAM_TPGT:
+ iscsi_copy_param(ev, &value, data);
+ session->tpgt = value;
+ break;
+ case ISCSI_PARAM_PERSISTENT_PORT:
+ iscsi_copy_param(ev, &value, data);
+ conn->persistent_port = value;
+ break;
+ case ISCSI_PARAM_PERSISTENT_ADDRESS:
+ /*
+ * this is the address returned in discovery so it should
+ * not change between logins.
+ */
+ if (conn->persistent_address)
+ return 0;
+
+ conn->persistent_address = kstrdup(data, GFP_KERNEL);
+ if (!conn->persistent_address)
+ return -ENOMEM;
+ break;
+ default:
+ iscsi_copy_param(ev, &value, data);
+ err = transport->set_param(conn, ev->u.set_param.param, value);
+ }
+
+ return err;
+}
+
static int
iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
{
@@ -841,6 +937,7 @@
struct iscsi_internal *priv;
struct iscsi_cls_session *session;
struct iscsi_cls_conn *conn;
+ unsigned long flags;
priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
if (!priv)
@@ -855,10 +952,14 @@
err = iscsi_if_create_session(priv, ev);
break;
case ISCSI_UEVENT_DESTROY_SESSION:
- session = iscsi_session_lookup(ev->u.d_session.session_handle);
- if (session)
+ session = iscsi_session_lookup(ev->u.d_session.sid);
+ if (session) {
+ spin_lock_irqsave(&sesslock, flags);
+ list_del(&session->sess_list);
+ spin_unlock_irqrestore(&sesslock, flags);
+
transport->destroy_session(session);
- else
+ } else
err = -EINVAL;
break;
case ISCSI_UEVENT_CREATE_CONN:
@@ -868,8 +969,8 @@
err = iscsi_if_destroy_conn(transport, ev);
break;
case ISCSI_UEVENT_BIND_CONN:
- session = iscsi_session_lookup(ev->u.b_conn.session_handle);
- conn = iscsi_conn_lookup(ev->u.b_conn.conn_handle);
+ session = iscsi_session_lookup(ev->u.b_conn.sid);
+ conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
if (session && conn)
ev->r.retcode = transport->bind_conn(session, conn,
@@ -879,30 +980,24 @@
err = -EINVAL;
break;
case ISCSI_UEVENT_SET_PARAM:
- conn = iscsi_conn_lookup(ev->u.set_param.conn_handle);
- if (conn)
- ev->r.retcode = transport->set_param(conn,
- ev->u.set_param.param, ev->u.set_param.value);
- else
- err = -EINVAL;
+ err = iscsi_set_param(transport, ev);
break;
case ISCSI_UEVENT_START_CONN:
- conn = iscsi_conn_lookup(ev->u.start_conn.conn_handle);
+ conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);
if (conn)
ev->r.retcode = transport->start_conn(conn);
else
err = -EINVAL;
-
break;
case ISCSI_UEVENT_STOP_CONN:
- conn = iscsi_conn_lookup(ev->u.stop_conn.conn_handle);
+ conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
if (conn)
transport->stop_conn(conn, ev->u.stop_conn.flag);
else
err = -EINVAL;
break;
case ISCSI_UEVENT_SEND_PDU:
- conn = iscsi_conn_lookup(ev->u.send_pdu.conn_handle);
+ conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
if (conn)
ev->r.retcode = transport->send_pdu(conn,
(struct iscsi_hdr*)((char*)ev + sizeof(*ev)),
@@ -923,9 +1018,11 @@
return err;
}
-/* Get message from skb (based on rtnetlink_rcv_skb). Each message is
- * processed by iscsi_if_recv_msg. Malformed skbs with wrong length are
- * or invalid creds discarded silently. */
+/*
+ * Get message from skb (based on rtnetlink_rcv_skb). Each message is
+ * processed by iscsi_if_recv_msg. Malformed skbs with wrong lengths or
+ * invalid creds are discarded silently.
+ */
static void
iscsi_if_rx(struct sock *sk, int len)
{
@@ -988,6 +1085,10 @@
#define iscsi_cdev_to_conn(_cdev) \
iscsi_dev_to_conn(_cdev->dev)
+#define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
+struct class_device_attribute class_device_attr_##_prefix##_##_name = \
+ __ATTR(_name,_mode,_show,_store)
+
/*
* iSCSI connection attrs
*/
@@ -1005,7 +1106,8 @@
#define iscsi_conn_int_attr(field, param, format) \
iscsi_conn_int_attr_show(param, format) \
-static CLASS_DEVICE_ATTR(field, S_IRUGO, show_conn_int_param_##param, NULL);
+static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_int_param_##param, \
+ NULL);
iscsi_conn_int_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH, "%u");
iscsi_conn_int_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH, "%u");
@@ -1013,6 +1115,25 @@
iscsi_conn_int_attr(data_digest, ISCSI_PARAM_DATADGST_EN, "%d");
iscsi_conn_int_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN, "%d");
iscsi_conn_int_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN, "%d");
+iscsi_conn_int_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT, "%d");
+iscsi_conn_int_attr(port, ISCSI_PARAM_CONN_PORT, "%d");
+
+#define iscsi_conn_str_attr_show(param) \
+static ssize_t \
+show_conn_str_param_##param(struct class_device *cdev, char *buf) \
+{ \
+ struct iscsi_cls_conn *conn = iscsi_cdev_to_conn(cdev); \
+ struct iscsi_transport *t = conn->transport; \
+ return t->get_conn_str_param(conn, param, buf); \
+}
+
+#define iscsi_conn_str_attr(field, param) \
+ iscsi_conn_str_attr_show(param) \
+static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_str_param_##param, \
+ NULL);
+
+iscsi_conn_str_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
+iscsi_conn_str_attr(address, ISCSI_PARAM_CONN_ADDRESS);
#define iscsi_cdev_to_session(_cdev) \
iscsi_dev_to_session(_cdev->dev)
@@ -1034,7 +1155,8 @@
#define iscsi_session_int_attr(field, param, format) \
iscsi_session_int_attr_show(param, format) \
-static CLASS_DEVICE_ATTR(field, S_IRUGO, show_session_int_param_##param, NULL);
+static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_int_param_##param, \
+ NULL);
iscsi_session_int_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, "%d");
iscsi_session_int_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, "%hu");
@@ -1044,18 +1166,89 @@
iscsi_session_int_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, "%d");
iscsi_session_int_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, "%d");
iscsi_session_int_attr(erl, ISCSI_PARAM_ERL, "%d");
+iscsi_session_int_attr(tpgt, ISCSI_PARAM_TPGT, "%d");
-#define SETUP_SESSION_RD_ATTR(field, param) \
- if (priv->param_mask & (1 << param)) { \
- priv->session_attrs[count] = &class_device_attr_##field;\
- count++; \
- }
+#define iscsi_session_str_attr_show(param) \
+static ssize_t \
+show_session_str_param_##param(struct class_device *cdev, char *buf) \
+{ \
+ struct iscsi_cls_session *session = iscsi_cdev_to_session(cdev); \
+ struct iscsi_transport *t = session->transport; \
+ return t->get_session_str_param(session, param, buf); \
+}
-#define SETUP_CONN_RD_ATTR(field, param) \
- if (priv->param_mask & (1 << param)) { \
- priv->conn_attrs[count] = &class_device_attr_##field; \
+#define iscsi_session_str_attr(field, param) \
+ iscsi_session_str_attr_show(param) \
+static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_str_param_##param, \
+ NULL);
+
+iscsi_session_str_attr(targetname, ISCSI_PARAM_TARGET_NAME);
+
+/*
+ * Private session and conn attrs. userspace uses several iscsi values
+ * to identify each session between reboots. Some of these values may not
+ * be present in the iscsi_transport/LLD driver becuase userspace handles
+ * login (and failback for login redirect) so for these type of drivers
+ * the class manages the attrs and values for the iscsi_transport/LLD
+ */
+#define iscsi_priv_session_attr_show(field, format) \
+static ssize_t \
+show_priv_session_##field(struct class_device *cdev, char *buf) \
+{ \
+ struct iscsi_cls_session *session = iscsi_cdev_to_session(cdev); \
+ return sprintf(buf, format"\n", session->field); \
+}
+
+#define iscsi_priv_session_attr(field, format) \
+ iscsi_priv_session_attr_show(field, format) \
+static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO, show_priv_session_##field, \
+ NULL)
+iscsi_priv_session_attr(targetname, "%s");
+iscsi_priv_session_attr(tpgt, "%d");
+iscsi_priv_session_attr(recovery_tmo, "%d");
+
+#define iscsi_priv_conn_attr_show(field, format) \
+static ssize_t \
+show_priv_conn_##field(struct class_device *cdev, char *buf) \
+{ \
+ struct iscsi_cls_conn *conn = iscsi_cdev_to_conn(cdev); \
+ return sprintf(buf, format"\n", conn->field); \
+}
+
+#define iscsi_priv_conn_attr(field, format) \
+ iscsi_priv_conn_attr_show(field, format) \
+static ISCSI_CLASS_ATTR(priv_conn, field, S_IRUGO, show_priv_conn_##field, \
+ NULL)
+iscsi_priv_conn_attr(persistent_address, "%s");
+iscsi_priv_conn_attr(persistent_port, "%d");
+
+#define SETUP_PRIV_SESSION_RD_ATTR(field) \
+do { \
+ priv->session_attrs[count] = &class_device_attr_priv_sess_##field; \
+ count++; \
+} while (0)
+
+#define SETUP_SESSION_RD_ATTR(field, param_flag) \
+do { \
+ if (tt->param_mask & param_flag) { \
+ priv->session_attrs[count] = &class_device_attr_sess_##field; \
count++; \
- }
+ } \
+} while (0)
+
+#define SETUP_PRIV_CONN_RD_ATTR(field) \
+do { \
+ priv->conn_attrs[count] = &class_device_attr_priv_conn_##field; \
+ count++; \
+} while (0)
+
+#define SETUP_CONN_RD_ATTR(field, param_flag) \
+do { \
+ if (tt->param_mask & param_flag) { \
+ priv->conn_attrs[count] = &class_device_attr_conn_##field; \
+ count++; \
+ } \
+} while (0)
static int iscsi_session_match(struct attribute_container *cont,
struct device *dev)
@@ -1104,6 +1297,24 @@
return &priv->conn_cont.ac == cont;
}
+static int iscsi_host_match(struct attribute_container *cont,
+ struct device *dev)
+{
+ struct Scsi_Host *shost;
+ struct iscsi_internal *priv;
+
+ if (!scsi_is_host_device(dev))
+ return 0;
+
+ shost = dev_to_shost(dev);
+ if (!shost->transportt ||
+ shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
+ return 0;
+
+ priv = to_iscsi_internal(shost->transportt);
+ return &priv->t.host_attrs.ac == cont;
+}
+
struct scsi_transport_template *
iscsi_register_transport(struct iscsi_transport *tt)
{
@@ -1122,6 +1333,7 @@
return NULL;
INIT_LIST_HEAD(&priv->list);
priv->iscsi_transport = tt;
+ priv->t.user_scan = iscsi_user_scan;
priv->cdev.class = &iscsi_transport_class;
snprintf(priv->cdev.class_id, BUS_ID_SIZE, "%s", tt->name);
@@ -1133,18 +1345,13 @@
if (err)
goto unregister_cdev;
- /* setup parameters mask */
- priv->param_mask = 0xFFFFFFFF;
- if (!(tt->caps & CAP_MULTI_R2T))
- priv->param_mask &= ~(1 << ISCSI_PARAM_MAX_R2T);
- if (!(tt->caps & CAP_HDRDGST))
- priv->param_mask &= ~(1 << ISCSI_PARAM_HDRDGST_EN);
- if (!(tt->caps & CAP_DATADGST))
- priv->param_mask &= ~(1 << ISCSI_PARAM_DATADGST_EN);
- if (!(tt->caps & CAP_MARKERS)) {
- priv->param_mask &= ~(1 << ISCSI_PARAM_IFMARKER_EN);
- priv->param_mask &= ~(1 << ISCSI_PARAM_OFMARKER_EN);
- }
+ /* host parameters */
+ priv->t.host_attrs.ac.attrs = &priv->host_attrs[0];
+ priv->t.host_attrs.ac.class = &iscsi_host_class.class;
+ priv->t.host_attrs.ac.match = iscsi_host_match;
+ priv->t.host_size = sizeof(struct iscsi_host);
+ priv->host_attrs[0] = NULL;
+ transport_container_register(&priv->t.host_attrs);
/* connection parameters */
priv->conn_cont.ac.attrs = &priv->conn_attrs[0];
@@ -1152,12 +1359,24 @@
priv->conn_cont.ac.match = iscsi_conn_match;
transport_container_register(&priv->conn_cont);
- SETUP_CONN_RD_ATTR(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
- SETUP_CONN_RD_ATTR(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
- SETUP_CONN_RD_ATTR(header_digest, ISCSI_PARAM_HDRDGST_EN);
- SETUP_CONN_RD_ATTR(data_digest, ISCSI_PARAM_DATADGST_EN);
- SETUP_CONN_RD_ATTR(ifmarker, ISCSI_PARAM_IFMARKER_EN);
- SETUP_CONN_RD_ATTR(ofmarker, ISCSI_PARAM_OFMARKER_EN);
+ SETUP_CONN_RD_ATTR(max_recv_dlength, ISCSI_MAX_RECV_DLENGTH);
+ SETUP_CONN_RD_ATTR(max_xmit_dlength, ISCSI_MAX_XMIT_DLENGTH);
+ SETUP_CONN_RD_ATTR(header_digest, ISCSI_HDRDGST_EN);
+ SETUP_CONN_RD_ATTR(data_digest, ISCSI_DATADGST_EN);
+ SETUP_CONN_RD_ATTR(ifmarker, ISCSI_IFMARKER_EN);
+ SETUP_CONN_RD_ATTR(ofmarker, ISCSI_OFMARKER_EN);
+ SETUP_CONN_RD_ATTR(address, ISCSI_CONN_ADDRESS);
+ SETUP_CONN_RD_ATTR(port, ISCSI_CONN_PORT);
+
+ if (tt->param_mask & ISCSI_PERSISTENT_ADDRESS)
+ SETUP_CONN_RD_ATTR(persistent_address, ISCSI_PERSISTENT_ADDRESS);
+ else
+ SETUP_PRIV_CONN_RD_ATTR(persistent_address);
+
+ if (tt->param_mask & ISCSI_PERSISTENT_PORT)
+ SETUP_CONN_RD_ATTR(persistent_port, ISCSI_PERSISTENT_PORT);
+ else
+ SETUP_PRIV_CONN_RD_ATTR(persistent_port);
BUG_ON(count > ISCSI_CONN_ATTRS);
priv->conn_attrs[count] = NULL;
@@ -1169,14 +1388,25 @@
priv->session_cont.ac.match = iscsi_session_match;
transport_container_register(&priv->session_cont);
- SETUP_SESSION_RD_ATTR(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN);
- SETUP_SESSION_RD_ATTR(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T);
- SETUP_SESSION_RD_ATTR(immediate_data, ISCSI_PARAM_IMM_DATA_EN);
- SETUP_SESSION_RD_ATTR(first_burst_len, ISCSI_PARAM_FIRST_BURST);
- SETUP_SESSION_RD_ATTR(max_burst_len, ISCSI_PARAM_MAX_BURST);
- SETUP_SESSION_RD_ATTR(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN);
- SETUP_SESSION_RD_ATTR(data_seq_in_order,ISCSI_PARAM_DATASEQ_INORDER_EN)
- SETUP_SESSION_RD_ATTR(erl, ISCSI_PARAM_ERL);
+ SETUP_SESSION_RD_ATTR(initial_r2t, ISCSI_INITIAL_R2T_EN);
+ SETUP_SESSION_RD_ATTR(max_outstanding_r2t, ISCSI_MAX_R2T);
+ SETUP_SESSION_RD_ATTR(immediate_data, ISCSI_IMM_DATA_EN);
+ SETUP_SESSION_RD_ATTR(first_burst_len, ISCSI_FIRST_BURST);
+ SETUP_SESSION_RD_ATTR(max_burst_len, ISCSI_MAX_BURST);
+ SETUP_SESSION_RD_ATTR(data_pdu_in_order, ISCSI_PDU_INORDER_EN);
+ SETUP_SESSION_RD_ATTR(data_seq_in_order, ISCSI_DATASEQ_INORDER_EN);
+ SETUP_SESSION_RD_ATTR(erl, ISCSI_ERL);
+ SETUP_PRIV_SESSION_RD_ATTR(recovery_tmo);
+
+ if (tt->param_mask & ISCSI_TARGET_NAME)
+ SETUP_SESSION_RD_ATTR(targetname, ISCSI_TARGET_NAME);
+ else
+ SETUP_PRIV_SESSION_RD_ATTR(targetname);
+
+ if (tt->param_mask & ISCSI_TPGT)
+ SETUP_SESSION_RD_ATTR(tpgt, ISCSI_TPGT);
+ else
+ SETUP_PRIV_SESSION_RD_ATTR(tpgt);
BUG_ON(count > ISCSI_SESSION_ATTRS);
priv->session_attrs[count] = NULL;
@@ -1214,6 +1444,7 @@
transport_container_unregister(&priv->conn_cont);
transport_container_unregister(&priv->session_cont);
+ transport_container_unregister(&priv->t.host_attrs);
sysfs_remove_group(&priv->cdev.kobj, &iscsi_transport_group);
class_device_unregister(&priv->cdev);
@@ -1257,10 +1488,14 @@
if (err)
return err;
- err = transport_class_register(&iscsi_connection_class);
+ err = transport_class_register(&iscsi_host_class);
if (err)
goto unregister_transport_class;
+ err = transport_class_register(&iscsi_connection_class);
+ if (err)
+ goto unregister_host_class;
+
err = transport_class_register(&iscsi_session_class);
if (err)
goto unregister_conn_class;
@@ -1288,6 +1523,8 @@
transport_class_unregister(&iscsi_session_class);
unregister_conn_class:
transport_class_unregister(&iscsi_connection_class);
+unregister_host_class:
+ transport_class_unregister(&iscsi_host_class);
unregister_transport_class:
class_unregister(&iscsi_transport_class);
return err;
@@ -1300,6 +1537,7 @@
netlink_unregister_notifier(&iscsi_nl_notifier);
transport_class_unregister(&iscsi_connection_class);
transport_class_unregister(&iscsi_session_class);
+ transport_class_unregister(&iscsi_host_class);
class_unregister(&iscsi_transport_class);
}
diff --git a/include/scsi/iscsi_if.h b/include/scsi/iscsi_if.h
index e5618b9..47524c7 100644
--- a/include/scsi/iscsi_if.h
+++ b/include/scsi/iscsi_if.h
@@ -60,59 +60,68 @@
uint32_t initial_cmdsn;
} c_session;
struct msg_destroy_session {
- uint64_t session_handle;
uint32_t sid;
} d_session;
struct msg_create_conn {
- uint64_t session_handle;
- uint32_t cid;
uint32_t sid;
+ uint32_t cid;
} c_conn;
struct msg_bind_conn {
- uint64_t session_handle;
- uint64_t conn_handle;
+ uint32_t sid;
+ uint32_t cid;
uint32_t transport_fd;
uint32_t is_leading;
} b_conn;
struct msg_destroy_conn {
- uint64_t conn_handle;
+ uint32_t sid;
uint32_t cid;
} d_conn;
struct msg_send_pdu {
+ uint32_t sid;
+ uint32_t cid;
uint32_t hdr_size;
uint32_t data_size;
- uint64_t conn_handle;
} send_pdu;
struct msg_set_param {
- uint64_t conn_handle;
+ uint32_t sid;
+ uint32_t cid;
uint32_t param; /* enum iscsi_param */
- uint32_t value;
+ uint32_t len;
} set_param;
struct msg_start_conn {
- uint64_t conn_handle;
+ uint32_t sid;
+ uint32_t cid;
} start_conn;
struct msg_stop_conn {
+ uint32_t sid;
+ uint32_t cid;
uint64_t conn_handle;
uint32_t flag;
} stop_conn;
struct msg_get_stats {
- uint64_t conn_handle;
+ uint32_t sid;
+ uint32_t cid;
} get_stats;
} u;
union {
/* messages k -> u */
- uint64_t handle;
int retcode;
struct msg_create_session_ret {
- uint64_t session_handle;
uint32_t sid;
+ uint32_t host_no;
} c_session_ret;
+ struct msg_create_conn_ret {
+ uint32_t sid;
+ uint32_t cid;
+ } c_conn_ret;
struct msg_recv_req {
+ uint32_t sid;
+ uint32_t cid;
uint64_t recv_handle;
- uint64_t conn_handle;
} recv_req;
struct msg_conn_error {
- uint64_t conn_handle;
+ uint32_t sid;
+ uint32_t cid;
uint32_t error; /* enum iscsi_err */
} connerror;
} r;
@@ -139,29 +148,64 @@
ISCSI_ERR_SESSION_FAILED = ISCSI_ERR_BASE + 13,
ISCSI_ERR_HDR_DGST = ISCSI_ERR_BASE + 14,
ISCSI_ERR_DATA_DGST = ISCSI_ERR_BASE + 15,
- ISCSI_ERR_PARAM_NOT_FOUND = ISCSI_ERR_BASE + 16
+ ISCSI_ERR_PARAM_NOT_FOUND = ISCSI_ERR_BASE + 16,
+ ISCSI_ERR_NO_SCSI_CMD = ISCSI_ERR_BASE + 17,
};
/*
* iSCSI Parameters (RFC3720)
*/
enum iscsi_param {
- ISCSI_PARAM_MAX_RECV_DLENGTH = 0,
- ISCSI_PARAM_MAX_XMIT_DLENGTH = 1,
- ISCSI_PARAM_HDRDGST_EN = 2,
- ISCSI_PARAM_DATADGST_EN = 3,
- ISCSI_PARAM_INITIAL_R2T_EN = 4,
- ISCSI_PARAM_MAX_R2T = 5,
- ISCSI_PARAM_IMM_DATA_EN = 6,
- ISCSI_PARAM_FIRST_BURST = 7,
- ISCSI_PARAM_MAX_BURST = 8,
- ISCSI_PARAM_PDU_INORDER_EN = 9,
- ISCSI_PARAM_DATASEQ_INORDER_EN = 10,
- ISCSI_PARAM_ERL = 11,
- ISCSI_PARAM_IFMARKER_EN = 12,
- ISCSI_PARAM_OFMARKER_EN = 13,
+ /* passed in using netlink set param */
+ ISCSI_PARAM_MAX_RECV_DLENGTH,
+ ISCSI_PARAM_MAX_XMIT_DLENGTH,
+ ISCSI_PARAM_HDRDGST_EN,
+ ISCSI_PARAM_DATADGST_EN,
+ ISCSI_PARAM_INITIAL_R2T_EN,
+ ISCSI_PARAM_MAX_R2T,
+ ISCSI_PARAM_IMM_DATA_EN,
+ ISCSI_PARAM_FIRST_BURST,
+ ISCSI_PARAM_MAX_BURST,
+ ISCSI_PARAM_PDU_INORDER_EN,
+ ISCSI_PARAM_DATASEQ_INORDER_EN,
+ ISCSI_PARAM_ERL,
+ ISCSI_PARAM_IFMARKER_EN,
+ ISCSI_PARAM_OFMARKER_EN,
+ ISCSI_PARAM_TARGET_NAME,
+ ISCSI_PARAM_TPGT,
+ ISCSI_PARAM_PERSISTENT_ADDRESS,
+ ISCSI_PARAM_PERSISTENT_PORT,
+ ISCSI_PARAM_SESS_RECOVERY_TMO,
+
+ /* pased in through bind conn using transport_fd */
+ ISCSI_PARAM_CONN_PORT,
+ ISCSI_PARAM_CONN_ADDRESS,
+
+ /* must always be last */
+ ISCSI_PARAM_MAX,
};
-#define ISCSI_PARAM_MAX 14
+
+#define ISCSI_MAX_RECV_DLENGTH (1 << ISCSI_PARAM_MAX_RECV_DLENGTH)
+#define ISCSI_MAX_XMIT_DLENGTH (1 << ISCSI_PARAM_MAX_XMIT_DLENGTH)
+#define ISCSI_HDRDGST_EN (1 << ISCSI_PARAM_HDRDGST_EN)
+#define ISCSI_DATADGST_EN (1 << ISCSI_PARAM_DATADGST_EN)
+#define ISCSI_INITIAL_R2T_EN (1 << ISCSI_PARAM_INITIAL_R2T_EN)
+#define ISCSI_MAX_R2T (1 << ISCSI_PARAM_MAX_R2T)
+#define ISCSI_IMM_DATA_EN (1 << ISCSI_PARAM_IMM_DATA_EN)
+#define ISCSI_FIRST_BURST (1 << ISCSI_PARAM_FIRST_BURST)
+#define ISCSI_MAX_BURST (1 << ISCSI_PARAM_MAX_BURST)
+#define ISCSI_PDU_INORDER_EN (1 << ISCSI_PARAM_PDU_INORDER_EN)
+#define ISCSI_DATASEQ_INORDER_EN (1 << ISCSI_PARAM_DATASEQ_INORDER_EN)
+#define ISCSI_ERL (1 << ISCSI_PARAM_ERL)
+#define ISCSI_IFMARKER_EN (1 << ISCSI_PARAM_IFMARKER_EN)
+#define ISCSI_OFMARKER_EN (1 << ISCSI_PARAM_OFMARKER_EN)
+#define ISCSI_TARGET_NAME (1 << ISCSI_PARAM_TARGET_NAME)
+#define ISCSI_TPGT (1 << ISCSI_PARAM_TPGT)
+#define ISCSI_PERSISTENT_ADDRESS (1 << ISCSI_PARAM_PERSISTENT_ADDRESS)
+#define ISCSI_PERSISTENT_PORT (1 << ISCSI_PARAM_PERSISTENT_PORT)
+#define ISCSI_SESS_RECOVERY_TMO (1 << ISCSI_PARAM_SESS_RECOVERY_TMO)
+#define ISCSI_CONN_PORT (1 << ISCSI_PARAM_CONN_PORT)
+#define ISCSI_CONN_ADDRESS (1 << ISCSI_PARAM_CONN_ADDRESS)
#define iscsi_ptr(_handle) ((void*)(unsigned long)_handle)
#define iscsi_handle(_ptr) ((uint64_t)(unsigned long)_ptr)
diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h
new file mode 100644
index 0000000..830700a
--- /dev/null
+++ b/include/scsi/libiscsi.h
@@ -0,0 +1,286 @@
+/*
+ * iSCSI lib definitions
+ *
+ * Copyright (C) 2006 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2004 - 2006 Mike Christie
+ * Copyright (C) 2004 - 2005 Dmitry Yusupov
+ * Copyright (C) 2004 - 2005 Alex Aizman
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+#ifndef LIBISCSI_H
+#define LIBISCSI_H
+
+#include <linux/types.h>
+#include <linux/mutex.h>
+#include <scsi/iscsi_proto.h>
+#include <scsi/iscsi_if.h>
+
+struct scsi_transport_template;
+struct scsi_device;
+struct Scsi_Host;
+struct scsi_cmnd;
+struct socket;
+struct iscsi_transport;
+struct iscsi_cls_session;
+struct iscsi_cls_conn;
+struct iscsi_session;
+struct iscsi_nopin;
+
+/* #define DEBUG_SCSI */
+#ifdef DEBUG_SCSI
+#define debug_scsi(fmt...) printk(KERN_INFO "scsi: " fmt)
+#else
+#define debug_scsi(fmt...)
+#endif
+
+#define ISCSI_XMIT_CMDS_MAX 128 /* must be power of 2 */
+#define ISCSI_MGMT_CMDS_MAX 32 /* must be power of 2 */
+#define ISCSI_CONN_MAX 1
+
+#define ISCSI_MGMT_ITT_OFFSET 0xa00
+
+#define ISCSI_DEF_CMD_PER_LUN 32
+#define ISCSI_MAX_CMD_PER_LUN 128
+
+/* Task Mgmt states */
+#define TMABORT_INITIAL 0x0
+#define TMABORT_SUCCESS 0x1
+#define TMABORT_FAILED 0x2
+#define TMABORT_TIMEDOUT 0x3
+
+/* Connection suspend "bit" */
+#define ISCSI_SUSPEND_BIT 1
+
+#define ISCSI_ITT_MASK (0xfff)
+#define ISCSI_CID_SHIFT 12
+#define ISCSI_CID_MASK (0xffff << ISCSI_CID_SHIFT)
+#define ISCSI_AGE_SHIFT 28
+#define ISCSI_AGE_MASK (0xf << ISCSI_AGE_SHIFT)
+
+struct iscsi_mgmt_task {
+ /*
+ * Becuae LLDs allocate their hdr differently, this is a pointer to
+ * that storage. It must be setup at session creation time.
+ */
+ struct iscsi_hdr *hdr;
+ char *data; /* mgmt payload */
+ int data_count; /* counts data to be sent */
+ uint32_t itt; /* this ITT */
+ void *dd_data; /* driver/transport data */
+ struct list_head running;
+};
+
+struct iscsi_cmd_task {
+ /*
+ * Becuae LLDs allocate their hdr differently, this is a pointer to
+ * that storage. It must be setup at session creation time.
+ */
+ struct iscsi_cmd *hdr;
+ int itt; /* this ITT */
+ int datasn; /* DataSN */
+
+ uint32_t unsol_datasn;
+ int imm_count; /* imm-data (bytes) */
+ int unsol_count; /* unsolicited (bytes)*/
+ int data_count; /* remaining Data-Out */
+ struct scsi_cmnd *sc; /* associated SCSI cmd*/
+ int total_length;
+ struct iscsi_conn *conn; /* used connection */
+ struct iscsi_mgmt_task *mtask; /* tmf mtask in progr */
+
+ struct list_head running; /* running cmd list */
+ void *dd_data; /* driver/transport data */
+};
+
+struct iscsi_conn {
+ struct iscsi_cls_conn *cls_conn; /* ptr to class connection */
+ void *dd_data; /* iscsi_transport data */
+ struct iscsi_session *session; /* parent session */
+ /*
+ * LLDs should set this lock. It protects the transport recv
+ * code
+ */
+ rwlock_t *recv_lock;
+ /*
+ * conn_stop() flag: stop to recover, stop to terminate
+ */
+ int stop_stage;
+
+ /* iSCSI connection-wide sequencing */
+ uint32_t exp_statsn;
+
+ /* control data */
+ int id; /* CID */
+ struct list_head item; /* maintains list of conns */
+ int c_stage; /* connection state */
+ struct iscsi_mgmt_task *login_mtask; /* mtask used for login/text */
+ struct iscsi_mgmt_task *mtask; /* xmit mtask in progress */
+ struct iscsi_cmd_task *ctask; /* xmit ctask in progress */
+
+ /* xmit */
+ struct kfifo *immqueue; /* immediate xmit queue */
+ struct kfifo *mgmtqueue; /* mgmt (control) xmit queue */
+ struct list_head mgmt_run_list; /* list of control tasks */
+ struct kfifo *xmitqueue; /* data-path cmd queue */
+ struct list_head run_list; /* list of cmds in progress */
+ struct work_struct xmitwork; /* per-conn. xmit workqueue */
+ /*
+ * serializes connection xmit, access to kfifos:
+ * xmitqueue, immqueue, mgmtqueue
+ */
+ struct mutex xmitmutex;
+
+ unsigned long suspend_tx; /* suspend Tx */
+ unsigned long suspend_rx; /* suspend Rx */
+
+ /* abort */
+ wait_queue_head_t ehwait; /* used in eh_abort() */
+ struct iscsi_tm tmhdr;
+ struct timer_list tmabort_timer;
+ int tmabort_state; /* see TMABORT_INITIAL, etc.*/
+
+ /* negotiated params */
+ int max_recv_dlength; /* initiator_max_recv_dsl*/
+ int max_xmit_dlength; /* target_max_recv_dsl */
+ int hdrdgst_en;
+ int datadgst_en;
+
+ /* MIB-statistics */
+ uint64_t txdata_octets;
+ uint64_t rxdata_octets;
+ uint32_t scsicmd_pdus_cnt;
+ uint32_t dataout_pdus_cnt;
+ uint32_t scsirsp_pdus_cnt;
+ uint32_t datain_pdus_cnt;
+ uint32_t r2t_pdus_cnt;
+ uint32_t tmfcmd_pdus_cnt;
+ int32_t tmfrsp_pdus_cnt;
+
+ /* custom statistics */
+ uint32_t eh_abort_cnt;
+};
+
+struct iscsi_queue {
+ struct kfifo *queue; /* FIFO Queue */
+ void **pool; /* Pool of elements */
+ int max; /* Max number of elements */
+};
+
+struct iscsi_session {
+ /* iSCSI session-wide sequencing */
+ uint32_t cmdsn;
+ uint32_t exp_cmdsn;
+ uint32_t max_cmdsn;
+
+ /* configuration */
+ int initial_r2t_en;
+ int max_r2t;
+ int imm_data_en;
+ int first_burst;
+ int max_burst;
+ int time2wait;
+ int time2retain;
+ int pdu_inorder_en;
+ int dataseq_inorder_en;
+ int erl;
+ int ifmarker_en;
+ int ofmarker_en;
+
+ /* control data */
+ struct iscsi_transport *tt;
+ struct Scsi_Host *host;
+ struct iscsi_conn *leadconn; /* leading connection */
+ spinlock_t lock; /* protects session state, *
+ * sequence numbers, *
+ * session resources: *
+ * - cmdpool, *
+ * - mgmtpool, *
+ * - r2tpool */
+ int state; /* session state */
+ int recovery_failed;
+ struct list_head item;
+ int conn_cnt;
+ int age; /* counts session re-opens */
+
+ struct list_head connections; /* list of connections */
+ int cmds_max; /* size of cmds array */
+ struct iscsi_cmd_task **cmds; /* Original Cmds arr */
+ struct iscsi_queue cmdpool; /* PDU's pool */
+ int mgmtpool_max; /* size of mgmt array */
+ struct iscsi_mgmt_task **mgmt_cmds; /* Original mgmt arr */
+ struct iscsi_queue mgmtpool; /* Mgmt PDU's pool */
+};
+
+/*
+ * scsi host template
+ */
+extern int iscsi_change_queue_depth(struct scsi_device *sdev, int depth);
+extern int iscsi_eh_abort(struct scsi_cmnd *sc);
+extern int iscsi_eh_host_reset(struct scsi_cmnd *sc);
+extern int iscsi_queuecommand(struct scsi_cmnd *sc,
+ void (*done)(struct scsi_cmnd *));
+
+/*
+ * session management
+ */
+extern struct iscsi_cls_session *
+iscsi_session_setup(struct iscsi_transport *, struct scsi_transport_template *,
+ int, int, uint32_t, uint32_t *);
+extern void iscsi_session_teardown(struct iscsi_cls_session *);
+extern struct iscsi_session *class_to_transport_session(struct iscsi_cls_session *);
+extern void iscsi_start_session_recovery(struct iscsi_session *,
+ struct iscsi_conn *, int);
+extern void iscsi_session_recovery_timedout(struct iscsi_cls_session *);
+
+#define session_to_cls(_sess) \
+ hostdata_session(_sess->host->hostdata)
+
+/*
+ * connection management
+ */
+extern struct iscsi_cls_conn *iscsi_conn_setup(struct iscsi_cls_session *,
+ uint32_t);
+extern void iscsi_conn_teardown(struct iscsi_cls_conn *);
+extern int iscsi_conn_start(struct iscsi_cls_conn *);
+extern void iscsi_conn_stop(struct iscsi_cls_conn *, int);
+extern int iscsi_conn_bind(struct iscsi_cls_session *, struct iscsi_cls_conn *,
+ int);
+extern void iscsi_conn_failure(struct iscsi_conn *conn, enum iscsi_err err);
+
+/*
+ * pdu and task processing
+ */
+extern int iscsi_check_assign_cmdsn(struct iscsi_session *,
+ struct iscsi_nopin *);
+extern void iscsi_prep_unsolicit_data_pdu(struct iscsi_cmd_task *,
+ struct iscsi_data *hdr,
+ int transport_data_cnt);
+extern int iscsi_conn_send_pdu(struct iscsi_cls_conn *, struct iscsi_hdr *,
+ char *, uint32_t);
+extern int iscsi_complete_pdu(struct iscsi_conn *, struct iscsi_hdr *,
+ char *, int);
+extern int __iscsi_complete_pdu(struct iscsi_conn *, struct iscsi_hdr *,
+ char *, int);
+extern int iscsi_verify_itt(struct iscsi_conn *, struct iscsi_hdr *,
+ uint32_t *);
+
+/*
+ * generic helpers
+ */
+extern void iscsi_pool_free(struct iscsi_queue *, void **);
+extern int iscsi_pool_init(struct iscsi_queue *, int, void ***, int);
+
+#endif
diff --git a/include/scsi/scsi_devinfo.h b/include/scsi/scsi_devinfo.h
index d31b16d..b4ddd3b 100644
--- a/include/scsi/scsi_devinfo.h
+++ b/include/scsi/scsi_devinfo.h
@@ -29,4 +29,5 @@
#define BLIST_SELECT_NO_ATN 0x200000 /* select without ATN */
#define BLIST_RETRY_HWERROR 0x400000 /* retry HARDWARE_ERROR */
#define BLIST_MAX_512 0x800000 /* maximum 512 sector cdb length */
+#define BLIST_ATTACH_PQ3 0x1000000 /* Scan: Attach to PQ3 devices */
#endif
diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h
index b41cf07..b332d6e 100644
--- a/include/scsi/scsi_transport_iscsi.h
+++ b/include/scsi/scsi_transport_iscsi.h
@@ -2,7 +2,7 @@
* iSCSI transport class definitions
*
* Copyright (C) IBM Corporation, 2004
- * Copyright (C) Mike Christie, 2004 - 2005
+ * Copyright (C) Mike Christie, 2004 - 2006
* Copyright (C) Dmitry Yusupov, 2004 - 2005
* Copyright (C) Alex Aizman, 2004 - 2005
*
@@ -27,9 +27,13 @@
#include <scsi/iscsi_if.h>
struct scsi_transport_template;
+struct iscsi_transport;
struct Scsi_Host;
struct mempool_zone;
struct iscsi_cls_conn;
+struct iscsi_conn;
+struct iscsi_cmd_task;
+struct iscsi_mgmt_task;
/**
* struct iscsi_transport - iSCSI Transport template
@@ -46,6 +50,20 @@
* @start_conn: set connection to be operational
* @stop_conn: suspend/recover/terminate connection
* @send_pdu: send iSCSI PDU, Login, Logout, NOP-Out, Reject, Text.
+ * @session_recovery_timedout: notify LLD a block during recovery timed out
+ * @suspend_conn_recv: susepend the recv side of the connection
+ * @termincate_conn: destroy socket connection. Called with mutex lock.
+ * @init_cmd_task: Initialize a iscsi_cmd_task and any internal structs.
+ * Called from queuecommand with session lock held.
+ * @init_mgmt_task: Initialize a iscsi_mgmt_task and any internal structs.
+ * Called from iscsi_conn_send_generic with xmitmutex.
+ * @xmit_cmd_task: requests LLD to transfer cmd task
+ * @xmit_mgmt_task: requests LLD to transfer mgmt task
+ * @cleanup_cmd_task: requests LLD to fail cmd task. Called with xmitmutex
+ * and session->lock after the connection has been
+ * suspended and terminated during recovery. If called
+ * from abort task then connection is not suspended
+ * or terminated but sk_callback_lock is held
*
* Template API provided by iSCSI Transport
*/
@@ -53,18 +71,18 @@
struct module *owner;
char *name;
unsigned int caps;
+ /* LLD sets this to indicate what values it can export to sysfs */
+ unsigned int param_mask;
struct scsi_host_template *host_template;
- /* LLD session/scsi_host data size */
- int hostdata_size;
- /* LLD iscsi_host data size */
- int ihostdata_size;
/* LLD connection data size */
int conndata_size;
+ /* LLD session data size */
+ int sessiondata_size;
int max_lun;
unsigned int max_conn;
unsigned int max_cmd_len;
- struct iscsi_cls_session *(*create_session)
- (struct scsi_transport_template *t, uint32_t sn, uint32_t *sid);
+ struct iscsi_cls_session *(*create_session) (struct iscsi_transport *it,
+ struct scsi_transport_template *t, uint32_t sn, uint32_t *hn);
void (*destroy_session) (struct iscsi_cls_session *session);
struct iscsi_cls_conn *(*create_conn) (struct iscsi_cls_session *sess,
uint32_t cid);
@@ -77,14 +95,30 @@
int (*set_param) (struct iscsi_cls_conn *conn, enum iscsi_param param,
uint32_t value);
int (*get_conn_param) (struct iscsi_cls_conn *conn,
- enum iscsi_param param,
- uint32_t *value);
+ enum iscsi_param param, uint32_t *value);
int (*get_session_param) (struct iscsi_cls_session *session,
enum iscsi_param param, uint32_t *value);
+ int (*get_conn_str_param) (struct iscsi_cls_conn *conn,
+ enum iscsi_param param, char *buf);
+ int (*get_session_str_param) (struct iscsi_cls_session *session,
+ enum iscsi_param param, char *buf);
int (*send_pdu) (struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
char *data, uint32_t data_size);
void (*get_stats) (struct iscsi_cls_conn *conn,
struct iscsi_stats *stats);
+ void (*suspend_conn_recv) (struct iscsi_conn *conn);
+ void (*terminate_conn) (struct iscsi_conn *conn);
+ void (*init_cmd_task) (struct iscsi_cmd_task *ctask);
+ void (*init_mgmt_task) (struct iscsi_conn *conn,
+ struct iscsi_mgmt_task *mtask,
+ char *data, uint32_t data_size);
+ int (*xmit_cmd_task) (struct iscsi_conn *conn,
+ struct iscsi_cmd_task *ctask);
+ void (*cleanup_cmd_task) (struct iscsi_conn *conn,
+ struct iscsi_cmd_task *ctask);
+ int (*xmit_mgmt_task) (struct iscsi_conn *conn,
+ struct iscsi_mgmt_task *mtask);
+ void (*session_recovery_timedout) (struct iscsi_cls_session *session);
};
/*
@@ -100,10 +134,26 @@
extern int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
char *data, uint32_t data_size);
+
+/* Connection's states */
+#define ISCSI_CONN_INITIAL_STAGE 0
+#define ISCSI_CONN_STARTED 1
+#define ISCSI_CONN_STOPPED 2
+#define ISCSI_CONN_CLEANUP_WAIT 3
+
struct iscsi_cls_conn {
struct list_head conn_list; /* item in connlist */
void *dd_data; /* LLD private data */
struct iscsi_transport *transport;
+ uint32_t cid; /* connection id */
+
+ /* portal/group values we got during discovery */
+ char *persistent_address;
+ int persistent_port;
+ /* portal/group values we are currently using */
+ char *address;
+ int port;
+
int active; /* must be accessed with the connlock */
struct device dev; /* sysfs transport/container device */
struct mempool_zone *z_error;
@@ -114,9 +164,30 @@
#define iscsi_dev_to_conn(_dev) \
container_of(_dev, struct iscsi_cls_conn, dev)
+/* Session's states */
+#define ISCSI_STATE_FREE 1
+#define ISCSI_STATE_LOGGED_IN 2
+#define ISCSI_STATE_FAILED 3
+#define ISCSI_STATE_TERMINATE 4
+
struct iscsi_cls_session {
struct list_head sess_list; /* item in session_list */
+ struct list_head host_list;
struct iscsi_transport *transport;
+
+ /* iSCSI values used as unique id by userspace. */
+ char *targetname;
+ int tpgt;
+
+ /* recovery fields */
+ int recovery_tmo;
+ struct work_struct recovery_work;
+
+ int target_id;
+ int channel;
+
+ int sid; /* session id */
+ void *dd_data; /* LLD private data */
struct device dev; /* sysfs transport/container device */
};
@@ -126,22 +197,22 @@
#define iscsi_session_to_shost(_session) \
dev_to_shost(_session->dev.parent)
+struct iscsi_host {
+ int next_target_id;
+ struct list_head sessions;
+ struct mutex mutex;
+};
+
/*
* session and connection functions that can be used by HW iSCSI LLDs
*/
extern struct iscsi_cls_session *iscsi_create_session(struct Scsi_Host *shost,
- struct iscsi_transport *t);
+ struct iscsi_transport *t, int channel);
extern int iscsi_destroy_session(struct iscsi_cls_session *session);
extern struct iscsi_cls_conn *iscsi_create_conn(struct iscsi_cls_session *sess,
uint32_t cid);
extern int iscsi_destroy_conn(struct iscsi_cls_conn *conn);
-
-/*
- * session functions used by software iscsi
- */
-extern struct Scsi_Host *
-iscsi_transport_create_session(struct scsi_transport_template *scsit,
- struct iscsi_transport *transport);
-extern int iscsi_transport_destroy_session(struct Scsi_Host *shost);
+extern void iscsi_unblock_session(struct iscsi_cls_session *session);
+extern void iscsi_block_session(struct iscsi_cls_session *session);
#endif