diff options
| -rw-r--r-- | drivers/infiniband/ulp/iser/iser_initiator.c | 4 | ||||
| -rw-r--r-- | drivers/scsi/iscsi_tcp.c | 4 | ||||
| -rw-r--r-- | drivers/scsi/libiscsi.c | 153 | ||||
| -rw-r--r-- | include/scsi/libiscsi.h | 2 | ||||
| -rw-r--r-- | include/scsi/scsi_transport_iscsi.h | 1 |
5 files changed, 88 insertions, 76 deletions
diff --git a/drivers/infiniband/ulp/iser/iser_initiator.c b/drivers/infiniband/ulp/iser/iser_initiator.c index a6f2303ed14..47f716ca002 100644 --- a/drivers/infiniband/ulp/iser/iser_initiator.c +++ b/drivers/infiniband/ulp/iser/iser_initiator.c @@ -621,9 +621,7 @@ void iser_snd_completion(struct iser_desc *tx_desc) struct iscsi_session *session = conn->session; spin_lock(&conn->session->lock); - list_del(&mtask->running); - __kfifo_put(session->mgmtpool.queue, (void*)&mtask, - sizeof(void*)); + iscsi_free_mgmt_task(conn, mtask); spin_unlock(&session->lock); } } diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c index f79a457099e..90eae8e0d97 100644 --- a/drivers/scsi/iscsi_tcp.c +++ b/drivers/scsi/iscsi_tcp.c @@ -1349,9 +1349,7 @@ iscsi_tcp_mtask_xmit(struct iscsi_conn *conn, struct iscsi_mgmt_task *mtask) 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*)); + iscsi_free_mgmt_task(conn, mtask); spin_unlock_bh(&session->lock); } return 0; diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c index d43f909a022..b7a2b9ad3a9 100644 --- a/drivers/scsi/libiscsi.c +++ b/drivers/scsi/libiscsi.c @@ -37,9 +37,6 @@ #include <scsi/scsi_transport_iscsi.h> #include <scsi/libiscsi.h> -static void fail_command(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask, - int err); - struct iscsi_session * class_to_transport_session(struct iscsi_cls_session *cls_session) { @@ -274,6 +271,53 @@ static void __iscsi_put_ctask(struct iscsi_cmd_task *ctask) iscsi_complete_command(ctask); } +/* + * session lock must be held + */ +static void fail_command(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask, + int err) +{ + struct scsi_cmnd *sc; + + sc = ctask->sc; + if (!sc) + return; + + if (ctask->state == ISCSI_TASK_PENDING) + /* + * cmd never made it to the xmit thread, so we should not count + * the cmd in the sequencing + */ + conn->session->queued_cmdsn--; + else + conn->session->tt->cleanup_cmd_task(conn, ctask); + + sc->result = err; + scsi_set_resid(sc, scsi_bufflen(sc)); + if (conn->ctask == ctask) + conn->ctask = NULL; + /* release ref from queuecommand */ + __iscsi_put_ctask(ctask); +} + +/** + * iscsi_free_mgmt_task - return mgmt task back to pool + * @conn: iscsi connection + * @mtask: mtask + * + * Must be called with session lock. + */ +void iscsi_free_mgmt_task(struct iscsi_conn *conn, + struct iscsi_mgmt_task *mtask) +{ + list_del_init(&mtask->running); + if (conn->login_mtask == mtask) + return; + __kfifo_put(conn->session->mgmtpool.queue, + (void*)&mtask, sizeof(void*)); +} +EXPORT_SYMBOL_GPL(iscsi_free_mgmt_task); + /** * iscsi_cmd_rsp - SCSI Command Response processing * @conn: iscsi connection @@ -464,10 +508,7 @@ int __iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, */ if (iscsi_recv_pdu(conn->cls_conn, hdr, data, datalen)) rc = ISCSI_ERR_CONN_FAILED; - list_del_init(&mtask->running); - if (conn->login_mtask != mtask) - __kfifo_put(session->mgmtpool.queue, - (void*)&mtask, sizeof(void*)); + iscsi_free_mgmt_task(conn, mtask); break; case ISCSI_OP_SCSI_TMFUNC_RSP: if (datalen) { @@ -476,6 +517,7 @@ int __iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, } iscsi_tmf_rsp(conn, hdr); + iscsi_free_mgmt_task(conn, mtask); break; case ISCSI_OP_NOOP_IN: if (hdr->ttt != cpu_to_be32(ISCSI_RESERVED_TAG) || datalen) { @@ -486,9 +528,7 @@ int __iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, if (iscsi_recv_pdu(conn->cls_conn, hdr, data, datalen)) rc = ISCSI_ERR_CONN_FAILED; - list_del_init(&mtask->running); - __kfifo_put(session->mgmtpool.queue, - (void*)&mtask, sizeof(void*)); + iscsi_free_mgmt_task(conn, mtask); break; default: rc = ISCSI_ERR_BAD_OPCODE; @@ -650,14 +690,12 @@ static void iscsi_prep_mtask(struct iscsi_conn *conn, static int iscsi_xmit_mtask(struct iscsi_conn *conn) { struct iscsi_hdr *hdr = conn->mtask->hdr; - int rc, was_logout = 0; + int rc; + if ((hdr->opcode & ISCSI_OPCODE_MASK) == ISCSI_OP_LOGOUT) + conn->session->state = ISCSI_STATE_LOGGING_OUT; spin_unlock_bh(&conn->session->lock); - if ((hdr->opcode & ISCSI_OPCODE_MASK) == ISCSI_OP_LOGOUT) { - conn->session->state = ISCSI_STATE_IN_RECOVERY; - iscsi_block_session(session_to_cls(conn->session)); - was_logout = 1; - } + rc = conn->session->tt->xmit_mgmt_task(conn, conn->mtask); spin_lock_bh(&conn->session->lock); if (rc) @@ -665,11 +703,6 @@ static int iscsi_xmit_mtask(struct iscsi_conn *conn) /* done with this in-progress mtask */ conn->mtask = NULL; - - if (was_logout) { - set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx); - return -ENODATA; - } return 0; } @@ -763,6 +796,12 @@ check_mgmt: while (!list_empty(&conn->mgmtqueue)) { conn->mtask = list_entry(conn->mgmtqueue.next, struct iscsi_mgmt_task, running); + if (conn->session->state == ISCSI_STATE_LOGGING_OUT) { + iscsi_free_mgmt_task(conn, conn->mtask); + conn->mtask = NULL; + continue; + } + iscsi_prep_mtask(conn, conn->mtask); list_move_tail(conn->mgmtqueue.next, &conn->mgmt_run_list); rc = iscsi_xmit_mtask(conn); @@ -777,6 +816,10 @@ check_mgmt: conn->ctask = list_entry(conn->xmitqueue.next, struct iscsi_cmd_task, running); + if (conn->session->state == ISCSI_STATE_LOGGING_OUT) { + fail_command(conn, conn->ctask, DID_NO_CONNECT << 16); + continue; + } if (iscsi_prep_scsi_cmd_pdu(conn->ctask)) { fail_command(conn, conn->ctask, DID_ABORT << 16); continue; @@ -800,6 +843,12 @@ check_mgmt: if (conn->session->fast_abort && conn->tmf_state != TMF_INITIAL) break; + /* + * we always do fastlogout - conn stop code will clean up. + */ + if (conn->session->state == ISCSI_STATE_LOGGING_OUT) + break; + conn->ctask = list_entry(conn->requeue.next, struct iscsi_cmd_task, running); conn->ctask->state = ISCSI_TASK_RUNNING; @@ -842,6 +891,7 @@ enum { FAILURE_SESSION_TERMINATE, FAILURE_SESSION_IN_RECOVERY, FAILURE_SESSION_RECOVERY_TIMEOUT, + FAILURE_SESSION_LOGGING_OUT, }; int iscsi_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *)) @@ -879,12 +929,19 @@ int iscsi_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *)) goto reject; } - if (session->state == ISCSI_STATE_RECOVERY_FAILED) + switch (session->state) { + case ISCSI_STATE_RECOVERY_FAILED: reason = FAILURE_SESSION_RECOVERY_TIMEOUT; - else if (session->state == ISCSI_STATE_TERMINATE) + break; + case ISCSI_STATE_TERMINATE: reason = FAILURE_SESSION_TERMINATE; - else + break; + case ISCSI_STATE_LOGGING_OUT: + reason = FAILURE_SESSION_LOGGING_OUT; + break; + default: reason = FAILURE_SESSION_FREED; + } goto fault; } @@ -1120,45 +1177,10 @@ static int iscsi_exec_task_mgmt_fn(struct iscsi_conn *conn, if (age != session->age || session->state != ISCSI_STATE_LOGGED_IN) return -ENOTCONN; - - if (!list_empty(&mtask->running)) { - list_del_init(&mtask->running); - __kfifo_put(session->mgmtpool.queue, (void*)&mtask, - sizeof(void*)); - } return 0; } /* - * session lock must be held - */ -static void fail_command(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask, - int err) -{ - struct scsi_cmnd *sc; - - sc = ctask->sc; - if (!sc) - return; - - if (ctask->state == ISCSI_TASK_PENDING) - /* - * cmd never made it to the xmit thread, so we should not count - * the cmd in the sequencing - */ - conn->session->queued_cmdsn--; - else - conn->session->tt->cleanup_cmd_task(conn, ctask); - - sc->result = err; - scsi_set_resid(sc, scsi_bufflen(sc)); - if (conn->ctask == ctask) - conn->ctask = NULL; - /* release ref from queuecommand */ - __iscsi_put_ctask(ctask); -} - -/* * Fail commands. session lock held and recv side suspended and xmit * thread flushed */ @@ -1837,22 +1859,13 @@ flush_control_queues(struct iscsi_session *session, struct iscsi_conn *conn) /* handle pending */ list_for_each_entry_safe(mtask, tmp, &conn->mgmtqueue, running) { debug_scsi("flushing pending mgmt task itt 0x%x\n", mtask->itt); - list_del_init(&mtask->running); - if (mtask == conn->login_mtask) - continue; - __kfifo_put(session->mgmtpool.queue, (void*)&mtask, - sizeof(void*)); + iscsi_free_mgmt_task(conn, mtask); } /* 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); - list_del_init(&mtask->running); - - if (mtask == conn->login_mtask) - continue; - __kfifo_put(session->mgmtpool.queue, (void*)&mtask, - sizeof(void*)); + iscsi_free_mgmt_task(conn, mtask); } conn->mtask = NULL; diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h index 4b3e3c15121..d68f74523f2 100644 --- a/include/scsi/libiscsi.h +++ b/include/scsi/libiscsi.h @@ -346,6 +346,8 @@ extern int __iscsi_complete_pdu(struct iscsi_conn *, struct iscsi_hdr *, extern int iscsi_verify_itt(struct iscsi_conn *, struct iscsi_hdr *, uint32_t *); extern void iscsi_requeue_ctask(struct iscsi_cmd_task *ctask); +extern void iscsi_free_mgmt_task(struct iscsi_conn *conn, + struct iscsi_mgmt_task *mtask); /* * generic helpers diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h index 7ff6199cbd5..b8d97bd20f6 100644 --- a/include/scsi/scsi_transport_iscsi.h +++ b/include/scsi/scsi_transport_iscsi.h @@ -176,6 +176,7 @@ struct iscsi_cls_conn { #define ISCSI_STATE_TERMINATE 4 #define ISCSI_STATE_IN_RECOVERY 5 #define ISCSI_STATE_RECOVERY_FAILED 6 +#define ISCSI_STATE_LOGGING_OUT 7 struct iscsi_cls_session { struct list_head sess_list; /* item in session_list */ |