| /* |
| * zfcp device driver |
| * |
| * Debug traces for zfcp. |
| * |
| * Copyright IBM Corp. 2002, 2017 |
| */ |
| |
| #define KMSG_COMPONENT "zfcp" |
| #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
| |
| #include <linux/module.h> |
| #include <linux/ctype.h> |
| #include <linux/slab.h> |
| #include <asm/debug.h> |
| #include "zfcp_dbf.h" |
| #include "zfcp_ext.h" |
| #include "zfcp_fc.h" |
| |
| static u32 dbfsize = 4; |
| |
| module_param(dbfsize, uint, 0400); |
| MODULE_PARM_DESC(dbfsize, |
| "number of pages for each debug feature area (default 4)"); |
| |
| static u32 dbflevel = 3; |
| |
| module_param(dbflevel, uint, 0400); |
| MODULE_PARM_DESC(dbflevel, |
| "log level for each debug feature area " |
| "(default 3, range 0..6)"); |
| |
| static inline unsigned int zfcp_dbf_plen(unsigned int offset) |
| { |
| return sizeof(struct zfcp_dbf_pay) + offset - ZFCP_DBF_PAY_MAX_REC; |
| } |
| |
| static inline |
| void zfcp_dbf_pl_write(struct zfcp_dbf *dbf, void *data, u16 length, char *area, |
| u64 req_id) |
| { |
| struct zfcp_dbf_pay *pl = &dbf->pay_buf; |
| u16 offset = 0, rec_length; |
| |
| spin_lock(&dbf->pay_lock); |
| memset(pl, 0, sizeof(*pl)); |
| pl->fsf_req_id = req_id; |
| memcpy(pl->area, area, ZFCP_DBF_TAG_LEN); |
| |
| while (offset < length) { |
| rec_length = min((u16) ZFCP_DBF_PAY_MAX_REC, |
| (u16) (length - offset)); |
| memcpy(pl->data, data + offset, rec_length); |
| debug_event(dbf->pay, 1, pl, zfcp_dbf_plen(rec_length)); |
| |
| offset += rec_length; |
| pl->counter++; |
| } |
| |
| spin_unlock(&dbf->pay_lock); |
| } |
| |
| /** |
| * zfcp_dbf_hba_fsf_res - trace event for fsf responses |
| * @tag: tag indicating which kind of unsolicited status has been received |
| * @req: request for which a response was received |
| */ |
| void zfcp_dbf_hba_fsf_res(char *tag, int level, struct zfcp_fsf_req *req) |
| { |
| struct zfcp_dbf *dbf = req->adapter->dbf; |
| struct fsf_qtcb_prefix *q_pref = &req->qtcb->prefix; |
| struct fsf_qtcb_header *q_head = &req->qtcb->header; |
| struct zfcp_dbf_hba *rec = &dbf->hba_buf; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&dbf->hba_lock, flags); |
| memset(rec, 0, sizeof(*rec)); |
| |
| memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); |
| rec->id = ZFCP_DBF_HBA_RES; |
| rec->fsf_req_id = req->req_id; |
| rec->fsf_req_status = req->status; |
| rec->fsf_cmd = req->fsf_command; |
| rec->fsf_seq_no = req->seq_no; |
| rec->u.res.req_issued = req->issued; |
| rec->u.res.prot_status = q_pref->prot_status; |
| rec->u.res.fsf_status = q_head->fsf_status; |
| rec->u.res.port_handle = q_head->port_handle; |
| rec->u.res.lun_handle = q_head->lun_handle; |
| |
| memcpy(rec->u.res.prot_status_qual, &q_pref->prot_status_qual, |
| FSF_PROT_STATUS_QUAL_SIZE); |
| memcpy(rec->u.res.fsf_status_qual, &q_head->fsf_status_qual, |
| FSF_STATUS_QUALIFIER_SIZE); |
| |
| if (req->fsf_command != FSF_QTCB_FCP_CMND) { |
| rec->pl_len = q_head->log_length; |
| zfcp_dbf_pl_write(dbf, (char *)q_pref + q_head->log_start, |
| rec->pl_len, "fsf_res", req->req_id); |
| } |
| |
| debug_event(dbf->hba, level, rec, sizeof(*rec)); |
| spin_unlock_irqrestore(&dbf->hba_lock, flags); |
| } |
| |
| /** |
| * zfcp_dbf_hba_fsf_uss - trace event for an unsolicited status buffer |
| * @tag: tag indicating which kind of unsolicited status has been received |
| * @req: request providing the unsolicited status |
| */ |
| void zfcp_dbf_hba_fsf_uss(char *tag, struct zfcp_fsf_req *req) |
| { |
| struct zfcp_dbf *dbf = req->adapter->dbf; |
| struct fsf_status_read_buffer *srb = req->data; |
| struct zfcp_dbf_hba *rec = &dbf->hba_buf; |
| static int const level = 2; |
| unsigned long flags; |
| |
| if (unlikely(!debug_level_enabled(dbf->hba, level))) |
| return; |
| |
| spin_lock_irqsave(&dbf->hba_lock, flags); |
| memset(rec, 0, sizeof(*rec)); |
| |
| memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); |
| rec->id = ZFCP_DBF_HBA_USS; |
| rec->fsf_req_id = req->req_id; |
| rec->fsf_req_status = req->status; |
| rec->fsf_cmd = req->fsf_command; |
| |
| if (!srb) |
| goto log; |
| |
| rec->u.uss.status_type = srb->status_type; |
| rec->u.uss.status_subtype = srb->status_subtype; |
| rec->u.uss.d_id = ntoh24(srb->d_id); |
| rec->u.uss.lun = srb->fcp_lun; |
| memcpy(&rec->u.uss.queue_designator, &srb->queue_designator, |
| sizeof(rec->u.uss.queue_designator)); |
| |
| /* status read buffer payload length */ |
| rec->pl_len = (!srb->length) ? 0 : srb->length - |
| offsetof(struct fsf_status_read_buffer, payload); |
| |
| if (rec->pl_len) |
| zfcp_dbf_pl_write(dbf, srb->payload.data, rec->pl_len, |
| "fsf_uss", req->req_id); |
| log: |
| debug_event(dbf->hba, level, rec, sizeof(*rec)); |
| spin_unlock_irqrestore(&dbf->hba_lock, flags); |
| } |
| |
| /** |
| * zfcp_dbf_hba_bit_err - trace event for bit error conditions |
| * @tag: tag indicating which kind of unsolicited status has been received |
| * @req: request which caused the bit_error condition |
| */ |
| void zfcp_dbf_hba_bit_err(char *tag, struct zfcp_fsf_req *req) |
| { |
| struct zfcp_dbf *dbf = req->adapter->dbf; |
| struct zfcp_dbf_hba *rec = &dbf->hba_buf; |
| struct fsf_status_read_buffer *sr_buf = req->data; |
| static int const level = 1; |
| unsigned long flags; |
| |
| if (unlikely(!debug_level_enabled(dbf->hba, level))) |
| return; |
| |
| spin_lock_irqsave(&dbf->hba_lock, flags); |
| memset(rec, 0, sizeof(*rec)); |
| |
| memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); |
| rec->id = ZFCP_DBF_HBA_BIT; |
| rec->fsf_req_id = req->req_id; |
| rec->fsf_req_status = req->status; |
| rec->fsf_cmd = req->fsf_command; |
| memcpy(&rec->u.be, &sr_buf->payload.bit_error, |
| sizeof(struct fsf_bit_error_payload)); |
| |
| debug_event(dbf->hba, level, rec, sizeof(*rec)); |
| spin_unlock_irqrestore(&dbf->hba_lock, flags); |
| } |
| |
| /** |
| * zfcp_dbf_hba_def_err - trace event for deferred error messages |
| * @adapter: pointer to struct zfcp_adapter |
| * @req_id: request id which caused the deferred error message |
| * @scount: number of sbals incl. the signaling sbal |
| * @pl: array of all involved sbals |
| */ |
| void zfcp_dbf_hba_def_err(struct zfcp_adapter *adapter, u64 req_id, u16 scount, |
| void **pl) |
| { |
| struct zfcp_dbf *dbf = adapter->dbf; |
| struct zfcp_dbf_pay *payload = &dbf->pay_buf; |
| unsigned long flags; |
| static int const level = 1; |
| u16 length; |
| |
| if (unlikely(!debug_level_enabled(dbf->pay, level))) |
| return; |
| |
| if (!pl) |
| return; |
| |
| spin_lock_irqsave(&dbf->pay_lock, flags); |
| memset(payload, 0, sizeof(*payload)); |
| |
| memcpy(payload->area, "def_err", 7); |
| payload->fsf_req_id = req_id; |
| payload->counter = 0; |
| length = min((u16)sizeof(struct qdio_buffer), |
| (u16)ZFCP_DBF_PAY_MAX_REC); |
| |
| while (payload->counter < scount && (char *)pl[payload->counter]) { |
| memcpy(payload->data, (char *)pl[payload->counter], length); |
| debug_event(dbf->pay, level, payload, zfcp_dbf_plen(length)); |
| payload->counter++; |
| } |
| |
| spin_unlock_irqrestore(&dbf->pay_lock, flags); |
| } |
| |
| /** |
| * zfcp_dbf_hba_basic - trace event for basic adapter events |
| * @adapter: pointer to struct zfcp_adapter |
| */ |
| void zfcp_dbf_hba_basic(char *tag, struct zfcp_adapter *adapter) |
| { |
| struct zfcp_dbf *dbf = adapter->dbf; |
| struct zfcp_dbf_hba *rec = &dbf->hba_buf; |
| static int const level = 1; |
| unsigned long flags; |
| |
| if (unlikely(!debug_level_enabled(dbf->hba, level))) |
| return; |
| |
| spin_lock_irqsave(&dbf->hba_lock, flags); |
| memset(rec, 0, sizeof(*rec)); |
| |
| memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); |
| rec->id = ZFCP_DBF_HBA_BASIC; |
| |
| debug_event(dbf->hba, level, rec, sizeof(*rec)); |
| spin_unlock_irqrestore(&dbf->hba_lock, flags); |
| } |
| |
| static void zfcp_dbf_set_common(struct zfcp_dbf_rec *rec, |
| struct zfcp_adapter *adapter, |
| struct zfcp_port *port, |
| struct scsi_device *sdev) |
| { |
| rec->adapter_status = atomic_read(&adapter->status); |
| if (port) { |
| rec->port_status = atomic_read(&port->status); |
| rec->wwpn = port->wwpn; |
| rec->d_id = port->d_id; |
| } |
| if (sdev) { |
| rec->lun_status = atomic_read(&sdev_to_zfcp(sdev)->status); |
| rec->lun = zfcp_scsi_dev_lun(sdev); |
| } else |
| rec->lun = ZFCP_DBF_INVALID_LUN; |
| } |
| |
| /** |
| * zfcp_dbf_rec_trig - trace event related to triggered recovery |
| * @tag: identifier for event |
| * @adapter: adapter on which the erp_action should run |
| * @port: remote port involved in the erp_action |
| * @sdev: scsi device involved in the erp_action |
| * @want: wanted erp_action |
| * @need: required erp_action |
| * |
| * The adapter->erp_lock has to be held. |
| */ |
| void zfcp_dbf_rec_trig(char *tag, struct zfcp_adapter *adapter, |
| struct zfcp_port *port, struct scsi_device *sdev, |
| u8 want, u8 need) |
| { |
| struct zfcp_dbf *dbf = adapter->dbf; |
| struct zfcp_dbf_rec *rec = &dbf->rec_buf; |
| static int const level = 1; |
| struct list_head *entry; |
| unsigned long flags; |
| |
| if (unlikely(!debug_level_enabled(dbf->rec, level))) |
| return; |
| |
| spin_lock_irqsave(&dbf->rec_lock, flags); |
| memset(rec, 0, sizeof(*rec)); |
| |
| rec->id = ZFCP_DBF_REC_TRIG; |
| memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); |
| zfcp_dbf_set_common(rec, adapter, port, sdev); |
| |
| list_for_each(entry, &adapter->erp_ready_head) |
| rec->u.trig.ready++; |
| |
| list_for_each(entry, &adapter->erp_running_head) |
| rec->u.trig.running++; |
| |
| rec->u.trig.want = want; |
| rec->u.trig.need = need; |
| |
| debug_event(dbf->rec, level, rec, sizeof(*rec)); |
| spin_unlock_irqrestore(&dbf->rec_lock, flags); |
| } |
| |
| |
| /** |
| * zfcp_dbf_rec_run_lvl - trace event related to running recovery |
| * @level: trace level to be used for event |
| * @tag: identifier for event |
| * @erp: erp_action running |
| */ |
| void zfcp_dbf_rec_run_lvl(int level, char *tag, struct zfcp_erp_action *erp) |
| { |
| struct zfcp_dbf *dbf = erp->adapter->dbf; |
| struct zfcp_dbf_rec *rec = &dbf->rec_buf; |
| unsigned long flags; |
| |
| if (!debug_level_enabled(dbf->rec, level)) |
| return; |
| |
| spin_lock_irqsave(&dbf->rec_lock, flags); |
| memset(rec, 0, sizeof(*rec)); |
| |
| rec->id = ZFCP_DBF_REC_RUN; |
| memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); |
| zfcp_dbf_set_common(rec, erp->adapter, erp->port, erp->sdev); |
| |
| rec->u.run.fsf_req_id = erp->fsf_req_id; |
| rec->u.run.rec_status = erp->status; |
| rec->u.run.rec_step = erp->step; |
| rec->u.run.rec_action = erp->action; |
| |
| if (erp->sdev) |
| rec->u.run.rec_count = |
| atomic_read(&sdev_to_zfcp(erp->sdev)->erp_counter); |
| else if (erp->port) |
| rec->u.run.rec_count = atomic_read(&erp->port->erp_counter); |
| else |
| rec->u.run.rec_count = atomic_read(&erp->adapter->erp_counter); |
| |
| debug_event(dbf->rec, level, rec, sizeof(*rec)); |
| spin_unlock_irqrestore(&dbf->rec_lock, flags); |
| } |
| |
| /** |
| * zfcp_dbf_rec_run - trace event related to running recovery |
| * @tag: identifier for event |
| * @erp: erp_action running |
| */ |
| void zfcp_dbf_rec_run(char *tag, struct zfcp_erp_action *erp) |
| { |
| zfcp_dbf_rec_run_lvl(1, tag, erp); |
| } |
| |
| /** |
| * zfcp_dbf_rec_run_wka - trace wka port event with info like running recovery |
| * @tag: identifier for event |
| * @wka_port: well known address port |
| * @req_id: request ID to correlate with potential HBA trace record |
| */ |
| void zfcp_dbf_rec_run_wka(char *tag, struct zfcp_fc_wka_port *wka_port, |
| u64 req_id) |
| { |
| struct zfcp_dbf *dbf = wka_port->adapter->dbf; |
| struct zfcp_dbf_rec *rec = &dbf->rec_buf; |
| static int const level = 1; |
| unsigned long flags; |
| |
| if (unlikely(!debug_level_enabled(dbf->rec, level))) |
| return; |
| |
| spin_lock_irqsave(&dbf->rec_lock, flags); |
| memset(rec, 0, sizeof(*rec)); |
| |
| rec->id = ZFCP_DBF_REC_RUN; |
| memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); |
| rec->port_status = wka_port->status; |
| rec->d_id = wka_port->d_id; |
| rec->lun = ZFCP_DBF_INVALID_LUN; |
| |
| rec->u.run.fsf_req_id = req_id; |
| rec->u.run.rec_status = ~0; |
| rec->u.run.rec_step = ~0; |
| rec->u.run.rec_action = ~0; |
| rec->u.run.rec_count = ~0; |
| |
| debug_event(dbf->rec, level, rec, sizeof(*rec)); |
| spin_unlock_irqrestore(&dbf->rec_lock, flags); |
| } |
| |
| #define ZFCP_DBF_SAN_LEVEL 1 |
| |
| static inline |
| void zfcp_dbf_san(char *tag, struct zfcp_dbf *dbf, |
| char *paytag, struct scatterlist *sg, u8 id, u16 len, |
| u64 req_id, u32 d_id, u16 cap_len) |
| { |
| struct zfcp_dbf_san *rec = &dbf->san_buf; |
| u16 rec_len; |
| unsigned long flags; |
| struct zfcp_dbf_pay *payload = &dbf->pay_buf; |
| u16 pay_sum = 0; |
| |
| spin_lock_irqsave(&dbf->san_lock, flags); |
| memset(rec, 0, sizeof(*rec)); |
| |
| rec->id = id; |
| rec->fsf_req_id = req_id; |
| rec->d_id = d_id; |
| memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); |
| rec->pl_len = len; /* full length even if we cap pay below */ |
| if (!sg) |
| goto out; |
| rec_len = min_t(unsigned int, sg->length, ZFCP_DBF_SAN_MAX_PAYLOAD); |
| memcpy(rec->payload, sg_virt(sg), rec_len); /* part of 1st sg entry */ |
| if (len <= rec_len) |
| goto out; /* skip pay record if full content in rec->payload */ |
| |
| /* if (len > rec_len): |
| * dump data up to cap_len ignoring small duplicate in rec->payload |
| */ |
| spin_lock(&dbf->pay_lock); |
| memset(payload, 0, sizeof(*payload)); |
| memcpy(payload->area, paytag, ZFCP_DBF_TAG_LEN); |
| payload->fsf_req_id = req_id; |
| payload->counter = 0; |
| for (; sg && pay_sum < cap_len; sg = sg_next(sg)) { |
| u16 pay_len, offset = 0; |
| |
| while (offset < sg->length && pay_sum < cap_len) { |
| pay_len = min((u16)ZFCP_DBF_PAY_MAX_REC, |
| (u16)(sg->length - offset)); |
| /* cap_len <= pay_sum < cap_len+ZFCP_DBF_PAY_MAX_REC */ |
| memcpy(payload->data, sg_virt(sg) + offset, pay_len); |
| debug_event(dbf->pay, ZFCP_DBF_SAN_LEVEL, payload, |
| zfcp_dbf_plen(pay_len)); |
| payload->counter++; |
| offset += pay_len; |
| pay_sum += pay_len; |
| } |
| } |
| spin_unlock(&dbf->pay_lock); |
| |
| out: |
| debug_event(dbf->san, ZFCP_DBF_SAN_LEVEL, rec, sizeof(*rec)); |
| spin_unlock_irqrestore(&dbf->san_lock, flags); |
| } |
| |
| /** |
| * zfcp_dbf_san_req - trace event for issued SAN request |
| * @tag: identifier for event |
| * @fsf_req: request containing issued CT data |
| * d_id: destination ID |
| */ |
| void zfcp_dbf_san_req(char *tag, struct zfcp_fsf_req *fsf, u32 d_id) |
| { |
| struct zfcp_dbf *dbf = fsf->adapter->dbf; |
| struct zfcp_fsf_ct_els *ct_els = fsf->data; |
| u16 length; |
| |
| if (unlikely(!debug_level_enabled(dbf->san, ZFCP_DBF_SAN_LEVEL))) |
| return; |
| |
| length = (u16)zfcp_qdio_real_bytes(ct_els->req); |
| zfcp_dbf_san(tag, dbf, "san_req", ct_els->req, ZFCP_DBF_SAN_REQ, |
| length, fsf->req_id, d_id, length); |
| } |
| |
| static u16 zfcp_dbf_san_res_cap_len_if_gpn_ft(char *tag, |
| struct zfcp_fsf_req *fsf, |
| u16 len) |
| { |
| struct zfcp_fsf_ct_els *ct_els = fsf->data; |
| struct fc_ct_hdr *reqh = sg_virt(ct_els->req); |
| struct fc_ns_gid_ft *reqn = (struct fc_ns_gid_ft *)(reqh + 1); |
| struct scatterlist *resp_entry = ct_els->resp; |
| struct fc_ct_hdr *resph; |
| struct fc_gpn_ft_resp *acc; |
| int max_entries, x, last = 0; |
| |
| if (!(memcmp(tag, "fsscth2", 7) == 0 |
| && ct_els->d_id == FC_FID_DIR_SERV |
| && reqh->ct_rev == FC_CT_REV |
| && reqh->ct_in_id[0] == 0 |
| && reqh->ct_in_id[1] == 0 |
| && reqh->ct_in_id[2] == 0 |
| && reqh->ct_fs_type == FC_FST_DIR |
| && reqh->ct_fs_subtype == FC_NS_SUBTYPE |
| && reqh->ct_options == 0 |
| && reqh->_ct_resvd1 == 0 |
| && reqh->ct_cmd == cpu_to_be16(FC_NS_GPN_FT) |
| /* reqh->ct_mr_size can vary so do not match but read below */ |
| && reqh->_ct_resvd2 == 0 |
| && reqh->ct_reason == 0 |
| && reqh->ct_explan == 0 |
| && reqh->ct_vendor == 0 |
| && reqn->fn_resvd == 0 |
| && reqn->fn_domain_id_scope == 0 |
| && reqn->fn_area_id_scope == 0 |
| && reqn->fn_fc4_type == FC_TYPE_FCP)) |
| return len; /* not GPN_FT response so do not cap */ |
| |
| acc = sg_virt(resp_entry); |
| |
| /* cap all but accept CT responses to at least the CT header */ |
| resph = (struct fc_ct_hdr *)acc; |
| if ((ct_els->status) || |
| (resph->ct_cmd != cpu_to_be16(FC_FS_ACC))) |
| return max(FC_CT_HDR_LEN, ZFCP_DBF_SAN_MAX_PAYLOAD); |
| |
| max_entries = (be16_to_cpu(reqh->ct_mr_size) * 4 / |
| sizeof(struct fc_gpn_ft_resp)) |
| + 1 /* zfcp_fc_scan_ports: bytes correct, entries off-by-one |
| * to account for header as 1st pseudo "entry" */; |
| |
| /* the basic CT_IU preamble is the same size as one entry in the GPN_FT |
| * response, allowing us to skip special handling for it - just skip it |
| */ |
| for (x = 1; x < max_entries && !last; x++) { |
| if (x % (ZFCP_FC_GPN_FT_ENT_PAGE + 1)) |
| acc++; |
| else |
| acc = sg_virt(++resp_entry); |
| |
| last = acc->fp_flags & FC_NS_FID_LAST; |
| } |
| len = min(len, (u16)(x * sizeof(struct fc_gpn_ft_resp))); |
| return len; /* cap after last entry */ |
| } |
| |
| /** |
| * zfcp_dbf_san_res - trace event for received SAN request |
| * @tag: identifier for event |
| * @fsf_req: request containing issued CT data |
| */ |
| void zfcp_dbf_san_res(char *tag, struct zfcp_fsf_req *fsf) |
| { |
| struct zfcp_dbf *dbf = fsf->adapter->dbf; |
| struct zfcp_fsf_ct_els *ct_els = fsf->data; |
| u16 length; |
| |
| if (unlikely(!debug_level_enabled(dbf->san, ZFCP_DBF_SAN_LEVEL))) |
| return; |
| |
| length = (u16)zfcp_qdio_real_bytes(ct_els->resp); |
| zfcp_dbf_san(tag, dbf, "san_res", ct_els->resp, ZFCP_DBF_SAN_RES, |
| length, fsf->req_id, ct_els->d_id, |
| zfcp_dbf_san_res_cap_len_if_gpn_ft(tag, fsf, length)); |
| } |
| |
| /** |
| * zfcp_dbf_san_in_els - trace event for incoming ELS |
| * @tag: identifier for event |
| * @fsf_req: request containing issued CT data |
| */ |
| void zfcp_dbf_san_in_els(char *tag, struct zfcp_fsf_req *fsf) |
| { |
| struct zfcp_dbf *dbf = fsf->adapter->dbf; |
| struct fsf_status_read_buffer *srb = |
| (struct fsf_status_read_buffer *) fsf->data; |
| u16 length; |
| struct scatterlist sg; |
| |
| if (unlikely(!debug_level_enabled(dbf->san, ZFCP_DBF_SAN_LEVEL))) |
| return; |
| |
| length = (u16)(srb->length - |
| offsetof(struct fsf_status_read_buffer, payload)); |
| sg_init_one(&sg, srb->payload.data, length); |
| zfcp_dbf_san(tag, dbf, "san_els", &sg, ZFCP_DBF_SAN_ELS, length, |
| fsf->req_id, ntoh24(srb->d_id), length); |
| } |
| |
| /** |
| * zfcp_dbf_scsi - trace event for scsi commands |
| * @tag: identifier for event |
| * @sc: pointer to struct scsi_cmnd |
| * @fsf: pointer to struct zfcp_fsf_req |
| */ |
| void zfcp_dbf_scsi(char *tag, int level, struct scsi_cmnd *sc, |
| struct zfcp_fsf_req *fsf) |
| { |
| struct zfcp_adapter *adapter = |
| (struct zfcp_adapter *) sc->device->host->hostdata[0]; |
| struct zfcp_dbf *dbf = adapter->dbf; |
| struct zfcp_dbf_scsi *rec = &dbf->scsi_buf; |
| struct fcp_resp_with_ext *fcp_rsp; |
| struct fcp_resp_rsp_info *fcp_rsp_info; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&dbf->scsi_lock, flags); |
| memset(rec, 0, sizeof(*rec)); |
| |
| memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); |
| rec->id = ZFCP_DBF_SCSI_CMND; |
| rec->scsi_result = sc->result; |
| rec->scsi_retries = sc->retries; |
| rec->scsi_allowed = sc->allowed; |
| rec->scsi_id = sc->device->id; |
| rec->scsi_lun = (u32)sc->device->lun; |
| rec->scsi_lun_64_hi = (u32)(sc->device->lun >> 32); |
| rec->host_scribble = (unsigned long)sc->host_scribble; |
| |
| memcpy(rec->scsi_opcode, sc->cmnd, |
| min((int)sc->cmd_len, ZFCP_DBF_SCSI_OPCODE)); |
| |
| if (fsf) { |
| rec->fsf_req_id = fsf->req_id; |
| rec->pl_len = FCP_RESP_WITH_EXT; |
| fcp_rsp = &(fsf->qtcb->bottom.io.fcp_rsp.iu); |
| /* mandatory parts of FCP_RSP IU in this SCSI record */ |
| memcpy(&rec->fcp_rsp, fcp_rsp, FCP_RESP_WITH_EXT); |
| if (fcp_rsp->resp.fr_flags & FCP_RSP_LEN_VAL) { |
| fcp_rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1]; |
| rec->fcp_rsp_info = fcp_rsp_info->rsp_code; |
| rec->pl_len += be32_to_cpu(fcp_rsp->ext.fr_rsp_len); |
| } |
| if (fcp_rsp->resp.fr_flags & FCP_SNS_LEN_VAL) { |
| rec->pl_len += be32_to_cpu(fcp_rsp->ext.fr_sns_len); |
| } |
| /* complete FCP_RSP IU in associated PAYload record |
| * but only if there are optional parts |
| */ |
| if (fcp_rsp->resp.fr_flags != 0) |
| zfcp_dbf_pl_write( |
| dbf, fcp_rsp, |
| /* at least one full PAY record |
| * but not beyond hardware response field |
| */ |
| min_t(u16, max_t(u16, rec->pl_len, |
| ZFCP_DBF_PAY_MAX_REC), |
| FSF_FCP_RSP_SIZE), |
| "fcp_riu", fsf->req_id); |
| } |
| |
| debug_event(dbf->scsi, level, rec, sizeof(*rec)); |
| spin_unlock_irqrestore(&dbf->scsi_lock, flags); |
| } |
| |
| static debug_info_t *zfcp_dbf_reg(const char *name, int size, int rec_size) |
| { |
| struct debug_info *d; |
| |
| d = debug_register(name, size, 1, rec_size); |
| if (!d) |
| return NULL; |
| |
| debug_register_view(d, &debug_hex_ascii_view); |
| debug_set_level(d, dbflevel); |
| |
| return d; |
| } |
| |
| static void zfcp_dbf_unregister(struct zfcp_dbf *dbf) |
| { |
| if (!dbf) |
| return; |
| |
| debug_unregister(dbf->scsi); |
| debug_unregister(dbf->san); |
| debug_unregister(dbf->hba); |
| debug_unregister(dbf->pay); |
| debug_unregister(dbf->rec); |
| kfree(dbf); |
| } |
| |
| /** |
| * zfcp_adapter_debug_register - registers debug feature for an adapter |
| * @adapter: pointer to adapter for which debug features should be registered |
| * return: -ENOMEM on error, 0 otherwise |
| */ |
| int zfcp_dbf_adapter_register(struct zfcp_adapter *adapter) |
| { |
| char name[DEBUG_MAX_NAME_LEN]; |
| struct zfcp_dbf *dbf; |
| |
| dbf = kzalloc(sizeof(struct zfcp_dbf), GFP_KERNEL); |
| if (!dbf) |
| return -ENOMEM; |
| |
| spin_lock_init(&dbf->pay_lock); |
| spin_lock_init(&dbf->hba_lock); |
| spin_lock_init(&dbf->san_lock); |
| spin_lock_init(&dbf->scsi_lock); |
| spin_lock_init(&dbf->rec_lock); |
| |
| /* debug feature area which records recovery activity */ |
| sprintf(name, "zfcp_%s_rec", dev_name(&adapter->ccw_device->dev)); |
| dbf->rec = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_rec)); |
| if (!dbf->rec) |
| goto err_out; |
| |
| /* debug feature area which records HBA (FSF and QDIO) conditions */ |
| sprintf(name, "zfcp_%s_hba", dev_name(&adapter->ccw_device->dev)); |
| dbf->hba = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_hba)); |
| if (!dbf->hba) |
| goto err_out; |
| |
| /* debug feature area which records payload info */ |
| sprintf(name, "zfcp_%s_pay", dev_name(&adapter->ccw_device->dev)); |
| dbf->pay = zfcp_dbf_reg(name, dbfsize * 2, sizeof(struct zfcp_dbf_pay)); |
| if (!dbf->pay) |
| goto err_out; |
| |
| /* debug feature area which records SAN command failures and recovery */ |
| sprintf(name, "zfcp_%s_san", dev_name(&adapter->ccw_device->dev)); |
| dbf->san = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_san)); |
| if (!dbf->san) |
| goto err_out; |
| |
| /* debug feature area which records SCSI command failures and recovery */ |
| sprintf(name, "zfcp_%s_scsi", dev_name(&adapter->ccw_device->dev)); |
| dbf->scsi = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_scsi)); |
| if (!dbf->scsi) |
| goto err_out; |
| |
| adapter->dbf = dbf; |
| |
| return 0; |
| err_out: |
| zfcp_dbf_unregister(dbf); |
| return -ENOMEM; |
| } |
| |
| /** |
| * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter |
| * @adapter: pointer to adapter for which debug features should be unregistered |
| */ |
| void zfcp_dbf_adapter_unregister(struct zfcp_adapter *adapter) |
| { |
| struct zfcp_dbf *dbf = adapter->dbf; |
| |
| adapter->dbf = NULL; |
| zfcp_dbf_unregister(dbf); |
| } |
| |