CIFS: Add tree connect/disconnect capability for SMB2
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>
diff --git a/fs/cifs/cifs_unicode.c b/fs/cifs/cifs_unicode.c
index fbb9da9..97c1d42 100644
--- a/fs/cifs/cifs_unicode.c
+++ b/fs/cifs/cifs_unicode.c
@@ -330,4 +330,3 @@
ctoUTF16_out:
return i;
}
-
diff --git a/fs/cifs/cifs_unicode.h b/fs/cifs/cifs_unicode.h
index a513a54..a44c6eb 100644
--- a/fs/cifs/cifs_unicode.h
+++ b/fs/cifs/cifs_unicode.h
@@ -84,7 +84,6 @@
const struct nls_table *codepage);
extern int cifsConvertToUTF16(__le16 *target, const char *source, int maxlen,
const struct nls_table *cp, int mapChars);
-
#endif
/*
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 0d78bc4..ef4e0a0 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -528,7 +528,7 @@
char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
char *nativeFileSystem;
char *password; /* for share-level security */
- __u16 tid; /* The 2 byte tree id */
+ __u32 tid; /* The 4 byte tree id */
__u16 Flags; /* optional support bits */
enum statusEnum tidStatus;
#ifdef CONFIG_CIFS_STATS
@@ -584,6 +584,15 @@
bool local_lease:1; /* check leases (only) on local system not remote */
bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
bool need_reconnect:1; /* connection reset, tid now invalid */
+#ifdef CONFIG_CIFS_SMB2
+ bool print:1; /* set if connection to printer share */
+ bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
+ __u32 capabilities;
+ __u32 share_flags;
+ __u32 maximal_access;
+ __u32 vol_serial_number;
+ __le64 vol_create_time;
+#endif /* CONFIG_CIFS_SMB2 */
#ifdef CONFIG_CIFS_FSCACHE
u64 resource_id; /* server resource id */
struct fscache_cookie *fscache; /* cookie for share */
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 0057861..0e33ca3 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -172,6 +172,8 @@
.negotiate = smb2_negotiate,
.sess_setup = SMB2_sess_setup,
.logoff = SMB2_logoff,
+ .tree_connect = SMB2_tcon,
+ .tree_disconnect = SMB2_tdis,
};
struct smb_version_values smb21_values = {
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 2165f0d..1bf037e 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -110,8 +110,8 @@
hdr->SessionId = tcon->ses->Suid;
/* BB check following DFS flags BB */
/* BB do we have to add check for SHI1005_FLAGS_DFS_ROOT too? */
- /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
- hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
+ if (tcon->share_flags & SHI1005_FLAGS_DFS)
+ hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS;
/* BB how does SMB2 do case sensitive? */
/* if (tcon->nocase)
hdr->Flags |= SMBFLG_CASELESS; */
@@ -549,3 +549,158 @@
*/
return rc;
}
+
+static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
+{
+ /* cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[code]); */
+}
+
+#define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
+
+int
+SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
+ struct cifs_tcon *tcon, const struct nls_table *cp)
+{
+ struct smb2_tree_connect_req *req;
+ struct smb2_tree_connect_rsp *rsp = NULL;
+ struct kvec iov[2];
+ int rc = 0;
+ int resp_buftype;
+ int unc_path_len;
+ struct TCP_Server_Info *server;
+ __le16 *unc_path = NULL;
+
+ cFYI(1, "TCON");
+
+ if ((ses->server) && tree)
+ server = ses->server;
+ else
+ return -EIO;
+
+ if (tcon && tcon->bad_network_name)
+ return -ENOENT;
+
+ unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
+ if (unc_path == NULL)
+ return -ENOMEM;
+
+ unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
+ unc_path_len *= 2;
+ if (unc_path_len < 2) {
+ kfree(unc_path);
+ return -EINVAL;
+ }
+
+ rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
+ if (rc) {
+ kfree(unc_path);
+ return rc;
+ }
+
+ if (tcon == NULL) {
+ /* since no tcon, smb2_init can not do this, so do here */
+ req->hdr.SessionId = ses->Suid;
+ /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
+ req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
+ }
+
+ iov[0].iov_base = (char *)req;
+ /* 4 for rfc1002 length field and 1 for pad */
+ iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
+
+ /* Testing shows that buffer offset must be at location of Buffer[0] */
+ req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
+ - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
+ req->PathLength = cpu_to_le16(unc_path_len - 2);
+ iov[1].iov_base = unc_path;
+ iov[1].iov_len = unc_path_len;
+
+ inc_rfc1001_len(req, unc_path_len - 1 /* pad */);
+
+ rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
+ rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base;
+
+ if (rc != 0) {
+ if (tcon) {
+ cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
+ tcon->need_reconnect = true;
+ }
+ goto tcon_error_exit;
+ }
+
+ if (rsp == NULL) {
+ rc = -EIO;
+ goto tcon_exit;
+ }
+
+ if (tcon == NULL) {
+ ses->ipc_tid = rsp->hdr.TreeId;
+ goto tcon_exit;
+ }
+
+ if (rsp->ShareType & SMB2_SHARE_TYPE_DISK)
+ cFYI(1, "connection to disk share");
+ else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
+ tcon->ipc = true;
+ cFYI(1, "connection to pipe share");
+ } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
+ tcon->print = true;
+ cFYI(1, "connection to printer");
+ } else {
+ cERROR(1, "unknown share type %d", rsp->ShareType);
+ rc = -EOPNOTSUPP;
+ goto tcon_error_exit;
+ }
+
+ tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
+ tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
+ tcon->tidStatus = CifsGood;
+ tcon->need_reconnect = false;
+ tcon->tid = rsp->hdr.TreeId;
+ strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
+
+ if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
+ ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
+ cERROR(1, "DFS capability contradicts DFS flag");
+
+tcon_exit:
+ free_rsp_buf(resp_buftype, rsp);
+ kfree(unc_path);
+ return rc;
+
+tcon_error_exit:
+ if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) {
+ cERROR(1, "BAD_NETWORK_NAME: %s", tree);
+ tcon->bad_network_name = true;
+ }
+ goto tcon_exit;
+}
+
+int
+SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
+{
+ struct smb2_tree_disconnect_req *req; /* response is trivial */
+ int rc = 0;
+ struct TCP_Server_Info *server;
+ struct cifs_ses *ses = tcon->ses;
+
+ cFYI(1, "Tree Disconnect");
+
+ if (ses && (ses->server))
+ server = ses->server;
+ else
+ return -EIO;
+
+ if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
+ return 0;
+
+ rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
+ if (rc)
+ return rc;
+
+ rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0);
+ if (rc)
+ cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
+
+ return rc;
+}
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index 26af68b..aa77bf3 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -224,4 +224,61 @@
__le16 Reserved;
} __packed;
+struct smb2_tree_connect_req {
+ struct smb2_hdr hdr;
+ __le16 StructureSize; /* Must be 9 */
+ __le16 Reserved;
+ __le16 PathOffset;
+ __le16 PathLength;
+ __u8 Buffer[1]; /* variable length */
+} __packed;
+
+struct smb2_tree_connect_rsp {
+ struct smb2_hdr hdr;
+ __le16 StructureSize; /* Must be 16 */
+ __u8 ShareType; /* see below */
+ __u8 Reserved;
+ __le32 ShareFlags; /* see below */
+ __le32 Capabilities; /* see below */
+ __le32 MaximalAccess;
+} __packed;
+
+/* Possible ShareType values */
+#define SMB2_SHARE_TYPE_DISK 0x01
+#define SMB2_SHARE_TYPE_PIPE 0x02
+#define SMB2_SHARE_TYPE_PRINT 0x03
+
+/*
+ * Possible ShareFlags - exactly one and only one of the first 4 caching flags
+ * must be set (any of the remaining, SHI1005, flags may be set individually
+ * or in combination.
+ */
+#define SMB2_SHAREFLAG_MANUAL_CACHING 0x00000000
+#define SMB2_SHAREFLAG_AUTO_CACHING 0x00000010
+#define SMB2_SHAREFLAG_VDO_CACHING 0x00000020
+#define SMB2_SHAREFLAG_NO_CACHING 0x00000030
+#define SHI1005_FLAGS_DFS 0x00000001
+#define SHI1005_FLAGS_DFS_ROOT 0x00000002
+#define SHI1005_FLAGS_RESTRICT_EXCLUSIVE_OPENS 0x00000100
+#define SHI1005_FLAGS_FORCE_SHARED_DELETE 0x00000200
+#define SHI1005_FLAGS_ALLOW_NAMESPACE_CACHING 0x00000400
+#define SHI1005_FLAGS_ACCESS_BASED_DIRECTORY_ENUM 0x00000800
+#define SHI1005_FLAGS_FORCE_LEVELII_OPLOCK 0x00001000
+#define SHI1005_FLAGS_ENABLE_HASH 0x00002000
+
+/* Possible share capabilities */
+#define SMB2_SHARE_CAP_DFS cpu_to_le32(0x00000008)
+
+struct smb2_tree_disconnect_req {
+ struct smb2_hdr hdr;
+ __le16 StructureSize; /* Must be 4 */
+ __le16 Reserved;
+} __packed;
+
+struct smb2_tree_disconnect_rsp {
+ struct smb2_hdr hdr;
+ __le16 StructureSize; /* Must be 4 */
+ __le16 Reserved;
+} __packed;
+
#endif /* _SMB2PDU_H */
diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h
index 9364fbc..bc72993 100644
--- a/fs/cifs/smb2proto.h
+++ b/fs/cifs/smb2proto.h
@@ -50,5 +50,9 @@
extern int SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
const struct nls_table *nls_cp);
extern int SMB2_logoff(const unsigned int xid, struct cifs_ses *ses);
+extern int SMB2_tcon(const unsigned int xid, struct cifs_ses *ses,
+ const char *tree, struct cifs_tcon *tcon,
+ const struct nls_table *);
+extern int SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon);
#endif /* _SMB2PROTO_H */