#include <scsi/scsi_transport_iscsi.h>
#include <scsi/libiscsi.h>
-static int iscsi_dbg_lib;
-module_param_named(debug_libiscsi, iscsi_dbg_lib, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(debug_libiscsi, "Turn on debugging for libiscsi module. "
- "Set to 1 to turn on, and zero to turn off. Default "
- "is off.");
+static int iscsi_dbg_lib_conn;
+module_param_named(debug_libiscsi_conn, iscsi_dbg_lib_conn, int,
+ S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug_libiscsi_conn,
+ "Turn on debugging for connections in libiscsi module. "
+ "Set to 1 to turn on, and zero to turn off. Default is off.");
+
+static int iscsi_dbg_lib_session;
+module_param_named(debug_libiscsi_session, iscsi_dbg_lib_session, int,
+ S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug_libiscsi_session,
+ "Turn on debugging for sessions in libiscsi module. "
+ "Set to 1 to turn on, and zero to turn off. Default is off.");
+
+static int iscsi_dbg_lib_eh;
+module_param_named(debug_libiscsi_eh, iscsi_dbg_lib_eh, int,
+ S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug_libiscsi_eh,
+ "Turn on debugging for error handling in libiscsi module. "
+ "Set to 1 to turn on, and zero to turn off. Default is off.");
#define ISCSI_DBG_CONN(_conn, dbg_fmt, arg...) \
do { \
- if (iscsi_dbg_lib) \
+ if (iscsi_dbg_lib_conn) \
iscsi_conn_printk(KERN_INFO, _conn, \
"%s " dbg_fmt, \
__func__, ##arg); \
#define ISCSI_DBG_SESSION(_session, dbg_fmt, arg...) \
do { \
- if (iscsi_dbg_lib) \
+ if (iscsi_dbg_lib_session) \
+ iscsi_session_printk(KERN_INFO, _session, \
+ "%s " dbg_fmt, \
+ __func__, ##arg); \
+ } while (0);
+
+#define ISCSI_DBG_EH(_session, dbg_fmt, arg...) \
+ do { \
+ if (iscsi_dbg_lib_eh) \
iscsi_session_printk(KERN_INFO, _session, \
"%s " dbg_fmt, \
__func__, ##arg); \
struct Scsi_Host *shost = conn->session->host;
struct iscsi_host *ihost = shost_priv(shost);
- queue_work(ihost->workq, &conn->xmitwork);
+ if (ihost->workq)
+ queue_work(ihost->workq, &conn->xmitwork);
}
EXPORT_SYMBOL_GPL(iscsi_conn_queue_work);
-void
-iscsi_update_cmdsn(struct iscsi_session *session, struct iscsi_nopin *hdr)
+static void __iscsi_update_cmdsn(struct iscsi_session *session,
+ uint32_t exp_cmdsn, uint32_t max_cmdsn)
{
- uint32_t max_cmdsn = be32_to_cpu(hdr->max_cmdsn);
- uint32_t exp_cmdsn = be32_to_cpu(hdr->exp_cmdsn);
-
/*
* standard specifies this check for when to update expected and
* max sequence numbers
* if the window closed with IO queued, then kick the
* xmit thread
*/
- if (!list_empty(&session->leadconn->xmitqueue) ||
- !list_empty(&session->leadconn->mgmtqueue)) {
- if (!(session->tt->caps & CAP_DATA_PATH_OFFLOAD))
- iscsi_conn_queue_work(session->leadconn);
- }
+ if (!list_empty(&session->leadconn->cmdqueue) ||
+ !list_empty(&session->leadconn->mgmtqueue))
+ iscsi_conn_queue_work(session->leadconn);
}
}
+
+void iscsi_update_cmdsn(struct iscsi_session *session, struct iscsi_nopin *hdr)
+{
+ __iscsi_update_cmdsn(session, be32_to_cpu(hdr->exp_cmdsn),
+ be32_to_cpu(hdr->max_cmdsn));
+}
EXPORT_SYMBOL_GPL(iscsi_update_cmdsn);
/**
itt_t itt;
int rc;
- rc = conn->session->tt->alloc_pdu(task, ISCSI_OP_SCSI_CMD);
- if (rc)
- return rc;
+ if (conn->session->tt->alloc_pdu) {
+ rc = conn->session->tt->alloc_pdu(task, ISCSI_OP_SCSI_CMD);
+ if (rc)
+ return rc;
+ }
hdr = (struct iscsi_cmd *) task->hdr;
itt = hdr->itt;
memset(hdr, 0, sizeof(*hdr));
hdr->flags = ISCSI_ATTR_SIMPLE;
int_to_scsilun(sc->device->lun, (struct scsi_lun *)hdr->lun);
memcpy(task->lun, hdr->lun, sizeof(task->lun));
- hdr->cmdsn = task->cmdsn = cpu_to_be32(session->cmdsn);
- session->cmdsn++;
hdr->exp_statsn = cpu_to_be32(conn->exp_statsn);
cmd_len = sc->cmd_len;
if (cmd_len < ISCSI_CDB_SIZE)
return -EIO;
task->state = ISCSI_TASK_RUNNING;
- list_move_tail(&task->running, &conn->run_list);
+ hdr->cmdsn = task->cmdsn = cpu_to_be32(session->cmdsn);
+ session->cmdsn++;
conn->scsicmd_pdus_cnt++;
ISCSI_DBG_SESSION(session, "iscsi prep [%s cid %d sc %p cdb 0x%x "
}
/**
- * iscsi_complete_command - finish a task
+ * iscsi_free_task - free a task
* @task: iscsi cmd task
*
* Must be called with session lock.
* This function returns the scsi command to scsi-ml or cleans
* up mgmt tasks then returns the task to the pool.
*/
-static void iscsi_complete_command(struct iscsi_task *task)
+static void iscsi_free_task(struct iscsi_task *task)
{
struct iscsi_conn *conn = task->conn;
struct iscsi_session *session = conn->session;
struct scsi_cmnd *sc = task->sc;
+ ISCSI_DBG_SESSION(session, "freeing task itt 0x%x state %d sc %p\n",
+ task->itt, task->state, task->sc);
+
session->tt->cleanup_task(task);
- list_del_init(&task->running);
- task->state = ISCSI_TASK_COMPLETED;
+ task->state = ISCSI_TASK_FREE;
task->sc = NULL;
-
- if (conn->task == task)
- conn->task = NULL;
/*
* login task is preallocated so do not free
*/
__kfifo_put(session->cmdpool.queue, (void*)&task, sizeof(void*));
- if (conn->ping_task == task)
- conn->ping_task = NULL;
-
if (sc) {
task->sc = NULL;
/* SCSI eh reuses commands to verify us */
static void __iscsi_put_task(struct iscsi_task *task)
{
if (atomic_dec_and_test(&task->refcount))
- iscsi_complete_command(task);
+ iscsi_free_task(task);
}
void iscsi_put_task(struct iscsi_task *task)
}
EXPORT_SYMBOL_GPL(iscsi_put_task);
+/**
+ * iscsi_complete_task - finish a task
+ * @task: iscsi cmd task
+ * @state: state to complete task with
+ *
+ * Must be called with session lock.
+ */
+static void iscsi_complete_task(struct iscsi_task *task, int state)
+{
+ struct iscsi_conn *conn = task->conn;
+
+ ISCSI_DBG_SESSION(conn->session,
+ "complete task itt 0x%x state %d sc %p\n",
+ task->itt, task->state, task->sc);
+ if (task->state == ISCSI_TASK_COMPLETED ||
+ task->state == ISCSI_TASK_ABRT_TMF ||
+ task->state == ISCSI_TASK_ABRT_SESS_RECOV)
+ return;
+ WARN_ON_ONCE(task->state == ISCSI_TASK_FREE);
+ task->state = state;
+
+ if (!list_empty(&task->running))
+ list_del_init(&task->running);
+
+ if (conn->task == task)
+ conn->task = NULL;
+
+ if (conn->ping_task == task)
+ conn->ping_task = NULL;
+
+ /* release get from queueing */
+ __iscsi_put_task(task);
+}
+
+/**
+ * iscsi_complete_scsi_task - finish scsi task normally
+ * @task: iscsi task for scsi cmd
+ * @exp_cmdsn: expected cmd sn in cpu format
+ * @max_cmdsn: max cmd sn in cpu format
+ *
+ * This is used when drivers do not need or cannot perform
+ * lower level pdu processing.
+ *
+ * Called with session lock
+ */
+void iscsi_complete_scsi_task(struct iscsi_task *task,
+ uint32_t exp_cmdsn, uint32_t max_cmdsn)
+{
+ struct iscsi_conn *conn = task->conn;
+
+ ISCSI_DBG_SESSION(conn->session, "[itt 0x%x]\n", task->itt);
+
+ conn->last_recv = jiffies;
+ __iscsi_update_cmdsn(conn->session, exp_cmdsn, max_cmdsn);
+ iscsi_complete_task(task, ISCSI_TASK_COMPLETED);
+}
+EXPORT_SYMBOL_GPL(iscsi_complete_scsi_task);
+
+
/*
- * session lock must be held
+ * session lock must be held and if not called for a task that is
+ * still pending or from the xmit thread, then xmit thread must
+ * be suspended.
*/
-static void fail_command(struct iscsi_conn *conn, struct iscsi_task *task,
- int err)
+static void fail_scsi_task(struct iscsi_task *task, int err)
{
+ struct iscsi_conn *conn = task->conn;
struct scsi_cmnd *sc;
+ int state;
+ /*
+ * if a command completes and we get a successful tmf response
+ * we will hit this because the scsi eh abort code does not take
+ * a ref to the task.
+ */
sc = task->sc;
if (!sc)
return;
- if (task->state == ISCSI_TASK_PENDING)
+ if (task->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--;
+ /* it was never sent so just complete like normal */
+ state = ISCSI_TASK_COMPLETED;
+ } else if (err == DID_TRANSPORT_DISRUPTED)
+ state = ISCSI_TASK_ABRT_SESS_RECOV;
+ else
+ state = ISCSI_TASK_ABRT_TMF;
- sc->result = err;
+ sc->result = err << 16;
if (!scsi_bidi_cmnd(sc))
scsi_set_resid(sc, scsi_bufflen(sc));
else {
scsi_in(sc)->resid = scsi_in(sc)->length;
}
- if (conn->task == task)
- conn->task = NULL;
- /* release ref from queuecommand */
- __iscsi_put_task(task);
+ iscsi_complete_task(task, state);
}
static int iscsi_prep_mgmt_task(struct iscsi_conn *conn,
session->state = ISCSI_STATE_LOGGING_OUT;
task->state = ISCSI_TASK_RUNNING;
- list_move_tail(&task->running, &conn->mgmt_run_list);
ISCSI_DBG_SESSION(session, "mgmtpdu [op 0x%x hdr->itt 0x%x "
"datalen %d]\n", hdr->opcode & ISCSI_OPCODE_MASK,
hdr->itt, task->data_count);
char *data, uint32_t data_size)
{
struct iscsi_session *session = conn->session;
+ struct iscsi_host *ihost = shost_priv(session->host);
struct iscsi_task *task;
itt_t itt;
*/
task = conn->login_task;
else {
+ if (session->state != ISCSI_STATE_LOGGED_IN)
+ return NULL;
+
BUG_ON(conn->c_stage == ISCSI_CONN_INITIAL_STAGE);
BUG_ON(conn->c_stage == ISCSI_CONN_STOPPED);
atomic_set(&task->refcount, 1);
task->conn = conn;
task->sc = NULL;
+ INIT_LIST_HEAD(&task->running);
+ task->state = ISCSI_TASK_PENDING;
if (data_size) {
memcpy(task->data, data, data_size);
} else
task->data_count = 0;
- if (conn->session->tt->alloc_pdu(task, hdr->opcode)) {
- iscsi_conn_printk(KERN_ERR, conn, "Could not allocate "
- "pdu for mgmt task.\n");
- goto requeue_task;
+ if (conn->session->tt->alloc_pdu) {
+ if (conn->session->tt->alloc_pdu(task, hdr->opcode)) {
+ iscsi_conn_printk(KERN_ERR, conn, "Could not allocate "
+ "pdu for mgmt task.\n");
+ goto free_task;
+ }
}
+
itt = task->hdr->itt;
task->hdr_len = sizeof(struct iscsi_hdr);
memcpy(task->hdr, hdr, sizeof(struct iscsi_hdr));
task->conn->session->age);
}
- INIT_LIST_HEAD(&task->running);
- list_add_tail(&task->running, &conn->mgmtqueue);
-
- if (session->tt->caps & CAP_DATA_PATH_OFFLOAD) {
+ if (!ihost->workq) {
if (iscsi_prep_mgmt_task(conn, task))
goto free_task;
if (session->tt->xmit_task(task))
goto free_task;
-
- } else
+ } else {
+ list_add_tail(&task->running, &conn->mgmtqueue);
iscsi_conn_queue_work(conn);
+ }
return task;
free_task:
__iscsi_put_task(task);
return NULL;
-
-requeue_task:
- if (task != conn->login_task)
- __kfifo_put(session->cmdpool.queue, (void*)&task,
- sizeof(void*));
- return NULL;
}
int iscsi_conn_send_pdu(struct iscsi_cls_conn *cls_conn, struct iscsi_hdr *hdr,
sc->result = (DID_BAD_TARGET << 16) | rhdr->cmd_status;
}
out:
- ISCSI_DBG_SESSION(session, "done [sc %p res %d itt 0x%x]\n",
+ ISCSI_DBG_SESSION(session, "cmd rsp done [sc %p res %d itt 0x%x]\n",
sc, sc->result, task->itt);
conn->scsirsp_pdus_cnt++;
-
- __iscsi_put_task(task);
+ iscsi_complete_task(task, ISCSI_TASK_COMPLETED);
}
/**
if (!(rhdr->flags & ISCSI_FLAG_DATA_STATUS))
return;
+ iscsi_update_cmdsn(conn->session, (struct iscsi_nopin *)hdr);
sc->result = (DID_OK << 16) | rhdr->cmd_status;
conn->exp_statsn = be32_to_cpu(rhdr->statsn) + 1;
if (rhdr->flags & (ISCSI_FLAG_DATA_UNDERFLOW |
sc->result = (DID_BAD_TARGET << 16) | rhdr->cmd_status;
}
+ ISCSI_DBG_SESSION(conn->session, "data in with status done "
+ "[sc %p res %d itt 0x%x]\n",
+ sc, sc->result, task->itt);
conn->scsirsp_pdus_cnt++;
- __iscsi_put_task(task);
+ iscsi_complete_task(task, ISCSI_TASK_COMPLETED);
}
static void iscsi_tmf_rsp(struct iscsi_conn *conn, struct iscsi_hdr *hdr)
}
}
+static int iscsi_nop_out_rsp(struct iscsi_task *task,
+ struct iscsi_nopin *nop, char *data, int datalen)
+{
+ struct iscsi_conn *conn = task->conn;
+ int rc = 0;
+
+ if (conn->ping_task != task) {
+ /*
+ * If this is not in response to one of our
+ * nops then it must be from userspace.
+ */
+ if (iscsi_recv_pdu(conn->cls_conn, (struct iscsi_hdr *)nop,
+ data, datalen))
+ rc = ISCSI_ERR_CONN_FAILED;
+ } else
+ mod_timer(&conn->transport_timer, jiffies + conn->recv_timeout);
+ iscsi_complete_task(task, ISCSI_TASK_COMPLETED);
+ return rc;
+}
+
static int iscsi_handle_reject(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
char *data, int datalen)
{
struct iscsi_reject *reject = (struct iscsi_reject *)hdr;
struct iscsi_hdr rejected_pdu;
+ int opcode, rc = 0;
conn->exp_statsn = be32_to_cpu(reject->statsn) + 1;
- if (reject->reason == ISCSI_REASON_DATA_DIGEST_ERROR) {
- if (ntoh24(reject->dlength) > datalen)
- return ISCSI_ERR_PROTO;
+ if (ntoh24(reject->dlength) > datalen ||
+ ntoh24(reject->dlength) < sizeof(struct iscsi_hdr)) {
+ iscsi_conn_printk(KERN_ERR, conn, "Cannot handle rejected "
+ "pdu. Invalid data length (pdu dlength "
+ "%u, datalen %d\n", ntoh24(reject->dlength),
+ datalen);
+ return ISCSI_ERR_PROTO;
+ }
+ memcpy(&rejected_pdu, data, sizeof(struct iscsi_hdr));
+ opcode = rejected_pdu.opcode & ISCSI_OPCODE_MASK;
+
+ switch (reject->reason) {
+ case ISCSI_REASON_DATA_DIGEST_ERROR:
+ iscsi_conn_printk(KERN_ERR, conn,
+ "pdu (op 0x%x itt 0x%x) rejected "
+ "due to DataDigest error.\n",
+ rejected_pdu.itt, opcode);
+ break;
+ case ISCSI_REASON_IMM_CMD_REJECT:
+ iscsi_conn_printk(KERN_ERR, conn,
+ "pdu (op 0x%x itt 0x%x) rejected. Too many "
+ "immediate commands.\n",
+ rejected_pdu.itt, opcode);
+ /*
+ * We only send one TMF at a time so if the target could not
+ * handle it, then it should get fixed (RFC mandates that
+ * a target can handle one immediate TMF per conn).
+ *
+ * For nops-outs, we could have sent more than one if
+ * the target is sending us lots of nop-ins
+ */
+ if (opcode != ISCSI_OP_NOOP_OUT)
+ return 0;
- if (ntoh24(reject->dlength) >= sizeof(struct iscsi_hdr)) {
- memcpy(&rejected_pdu, data, sizeof(struct iscsi_hdr));
- iscsi_conn_printk(KERN_ERR, conn,
- "pdu (op 0x%x) rejected "
- "due to DataDigest error.\n",
- rejected_pdu.opcode);
+ if (rejected_pdu.itt == cpu_to_be32(ISCSI_RESERVED_TAG))
+ /*
+ * nop-out in response to target's nop-out rejected.
+ * Just resend.
+ */
+ iscsi_send_nopout(conn,
+ (struct iscsi_nopin*)&rejected_pdu);
+ else {
+ struct iscsi_task *task;
+ /*
+ * Our nop as ping got dropped. We know the target
+ * and transport are ok so just clean up
+ */
+ task = iscsi_itt_to_task(conn, rejected_pdu.itt);
+ if (!task) {
+ iscsi_conn_printk(KERN_ERR, conn,
+ "Invalid pdu reject. Could "
+ "not lookup rejected task.\n");
+ rc = ISCSI_ERR_BAD_ITT;
+ } else
+ rc = iscsi_nop_out_rsp(task,
+ (struct iscsi_nopin*)&rejected_pdu,
+ NULL, 0);
}
+ break;
+ default:
+ iscsi_conn_printk(KERN_ERR, conn,
+ "pdu (op 0x%x itt 0x%x) rejected. Reason "
+ "code 0x%x\n", rejected_pdu.itt,
+ rejected_pdu.opcode, reject->reason);
+ break;
}
- return 0;
+ return rc;
}
/**
*
* The session lock must be held.
*/
-static struct iscsi_task *iscsi_itt_to_task(struct iscsi_conn *conn, itt_t itt)
+struct iscsi_task *iscsi_itt_to_task(struct iscsi_conn *conn, itt_t itt)
{
struct iscsi_session *session = conn->session;
int i;
return session->cmds[i];
}
+EXPORT_SYMBOL_GPL(iscsi_itt_to_task);
/**
* __iscsi_complete_pdu - complete pdu
task = iscsi_itt_to_ctask(conn, hdr->itt);
if (!task)
return ISCSI_ERR_BAD_ITT;
+ task->last_xfer = jiffies;
break;
case ISCSI_OP_R2T:
/*
}
iscsi_tmf_rsp(conn, hdr);
- __iscsi_put_task(task);
+ iscsi_complete_task(task, ISCSI_TASK_COMPLETED);
break;
case ISCSI_OP_NOOP_IN:
iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr);
}
conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1;
- if (conn->ping_task != task)
- /*
- * If this is not in response to one of our
- * nops then it must be from userspace.
- */
- goto recv_pdu;
-
- mod_timer(&conn->transport_timer, jiffies + conn->recv_timeout);
- __iscsi_put_task(task);
+ rc = iscsi_nop_out_rsp(task, (struct iscsi_nopin*)hdr,
+ data, datalen);
break;
default:
rc = ISCSI_ERR_BAD_OPCODE;
recv_pdu:
if (iscsi_recv_pdu(conn->cls_conn, hdr, data, datalen))
rc = ISCSI_ERR_CONN_FAILED;
- __iscsi_put_task(task);
+ iscsi_complete_task(task, ISCSI_TASK_COMPLETED);
return rc;
}
EXPORT_SYMBOL_GPL(__iscsi_complete_pdu);
struct iscsi_task *task = conn->task;
int rc;
+ if (test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx))
+ return -ENODATA;
+
__iscsi_get_task(task);
spin_unlock_bh(&conn->session->lock);
rc = conn->session->tt->xmit_task(task);
spin_lock_bh(&conn->session->lock);
- __iscsi_put_task(task);
- if (!rc)
+ if (!rc) {
/* done with this task */
+ task->last_xfer = jiffies;
conn->task = NULL;
+ }
+ __iscsi_put_task(task);
return rc;
}
{
struct iscsi_conn *conn = task->conn;
- list_move_tail(&task->running, &conn->requeue);
+ /*
+ * this may be on the requeue list already if the xmit_task callout
+ * is handling the r2ts while we are adding new ones
+ */
+ if (list_empty(&task->running))
+ list_add_tail(&task->running, &conn->requeue);
iscsi_conn_queue_work(conn);
}
EXPORT_SYMBOL_GPL(iscsi_requeue_task);
int rc = 0;
spin_lock_bh(&conn->session->lock);
- if (unlikely(conn->suspend_tx)) {
+ if (test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx)) {
ISCSI_DBG_SESSION(conn->session, "Tx suspended!\n");
spin_unlock_bh(&conn->session->lock);
return -ENODATA;
if (conn->task) {
rc = iscsi_xmit_task(conn);
if (rc)
- goto again;
+ goto done;
}
/*
while (!list_empty(&conn->mgmtqueue)) {
conn->task = list_entry(conn->mgmtqueue.next,
struct iscsi_task, running);
+ list_del_init(&conn->task->running);
if (iscsi_prep_mgmt_task(conn, conn->task)) {
__iscsi_put_task(conn->task);
conn->task = NULL;
}
rc = iscsi_xmit_task(conn);
if (rc)
- goto again;
+ goto done;
}
/* process pending command queue */
- while (!list_empty(&conn->xmitqueue)) {
+ while (!list_empty(&conn->cmdqueue)) {
if (conn->tmf_state == TMF_QUEUED)
break;
- conn->task = list_entry(conn->xmitqueue.next,
+ conn->task = list_entry(conn->cmdqueue.next,
struct iscsi_task, running);
+ list_del_init(&conn->task->running);
if (conn->session->state == ISCSI_STATE_LOGGING_OUT) {
- fail_command(conn, conn->task, DID_IMM_RETRY << 16);
+ fail_scsi_task(conn->task, DID_IMM_RETRY);
continue;
}
rc = iscsi_prep_scsi_cmd_pdu(conn->task);
if (rc) {
if (rc == -ENOMEM) {
+ list_add_tail(&conn->task->running,
+ &conn->cmdqueue);
conn->task = NULL;
- goto again;
+ goto done;
} else
- fail_command(conn, conn->task, DID_ABORT << 16);
+ fail_scsi_task(conn->task, DID_ABORT);
continue;
}
rc = iscsi_xmit_task(conn);
if (rc)
- goto again;
+ goto done;
/*
* we could continuously get new task requests so
* we need to check the mgmt queue for nops that need to
conn->task = list_entry(conn->requeue.next,
struct iscsi_task, running);
+ list_del_init(&conn->task->running);
conn->task->state = ISCSI_TASK_RUNNING;
- list_move_tail(conn->requeue.next, &conn->run_list);
rc = iscsi_xmit_task(conn);
if (rc)
- goto again;
+ goto done;
if (!list_empty(&conn->mgmtqueue))
goto check_mgmt;
}
spin_unlock_bh(&conn->session->lock);
return -ENODATA;
-again:
- if (unlikely(conn->suspend_tx))
- rc = -ENODATA;
+done:
spin_unlock_bh(&conn->session->lock);
return rc;
}
task->state = ISCSI_TASK_PENDING;
task->conn = conn;
task->sc = sc;
+ task->have_checked_conn = false;
+ task->last_timeout = jiffies;
+ task->last_xfer = jiffies;
INIT_LIST_HEAD(&task->running);
return task;
}
{
struct iscsi_cls_session *cls_session;
struct Scsi_Host *host;
+ struct iscsi_host *ihost;
int reason = 0;
struct iscsi_session *session;
struct iscsi_conn *conn;
sc->SCp.ptr = NULL;
host = sc->device->host;
+ ihost = shost_priv(host);
spin_unlock(host->host_lock);
cls_session = starget_to_session(scsi_target(sc->device));
goto fault;
}
- /*
- * ISCSI_STATE_FAILED is a temp. state. The recovery
- * code will decide what is best to do with command queued
- * during this time
- */
- if (session->state != ISCSI_STATE_LOGGED_IN &&
- session->state != ISCSI_STATE_FAILED) {
+ if (session->state != ISCSI_STATE_LOGGED_IN) {
/*
* to handle the race between when we set the recovery state
* and block the session we requeue here (commands could
* up because the block code is not locked)
*/
switch (session->state) {
+ case ISCSI_STATE_FAILED:
case ISCSI_STATE_IN_RECOVERY:
reason = FAILURE_SESSION_IN_RECOVERY;
- goto reject;
+ sc->result = DID_IMM_RETRY << 16;
+ break;
case ISCSI_STATE_LOGGING_OUT:
reason = FAILURE_SESSION_LOGGING_OUT;
- goto reject;
+ sc->result = DID_IMM_RETRY << 16;
+ break;
case ISCSI_STATE_RECOVERY_FAILED:
reason = FAILURE_SESSION_RECOVERY_TIMEOUT;
sc->result = DID_TRANSPORT_FAILFAST << 16;
goto fault;
}
+ if (test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx)) {
+ reason = FAILURE_SESSION_IN_RECOVERY;
+ sc->result = DID_REQUEUE;
+ goto fault;
+ }
+
if (iscsi_check_cmdsn_window_closed(conn)) {
reason = FAILURE_WINDOW_CLOSED;
goto reject;
reason = FAILURE_OOM;
goto reject;
}
- list_add_tail(&task->running, &conn->xmitqueue);
- if (session->tt->caps & CAP_DATA_PATH_OFFLOAD) {
+ if (!ihost->workq) {
reason = iscsi_prep_scsi_cmd_pdu(task);
if (reason) {
if (reason == -ENOMEM) {
}
}
if (session->tt->xmit_task(task)) {
+ session->cmdsn--;
reason = FAILURE_SESSION_NOT_READY;
goto prepd_reject;
}
- } else
+ } else {
+ list_add_tail(&task->running, &conn->cmdqueue);
iscsi_conn_queue_work(conn);
+ }
session->queued_cmdsn++;
spin_unlock(&session->lock);
prepd_reject:
sc->scsi_done = NULL;
- iscsi_complete_command(task);
+ iscsi_complete_task(task, ISCSI_TASK_COMPLETED);
reject:
spin_unlock(&session->lock);
ISCSI_DBG_SESSION(session, "cmd 0x%x rejected (%d)\n",
prepd_fault:
sc->scsi_done = NULL;
- iscsi_complete_command(task);
+ iscsi_complete_task(task, ISCSI_TASK_COMPLETED);
fault:
spin_unlock(&session->lock);
ISCSI_DBG_SESSION(session, "iscsi: cmd 0x%x is not queued (%d)\n",
spin_lock_bh(&session->lock);
if (session->state == ISCSI_STATE_TERMINATE) {
failed:
- iscsi_session_printk(KERN_INFO, session,
- "failing target reset: Could not log "
- "back into target [age %d]\n",
- session->age);
+ ISCSI_DBG_EH(session,
+ "failing target reset: Could not log back into "
+ "target [age %d]\n",
+ session->age);
spin_unlock_bh(&session->lock);
mutex_unlock(&session->eh_mutex);
return FAILED;
*/
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
- ISCSI_DBG_SESSION(session, "wait for relogin\n");
+ ISCSI_DBG_EH(session, "wait for relogin\n");
wait_event_interruptible(conn->ehwait,
session->state == ISCSI_STATE_TERMINATE ||
session->state == ISCSI_STATE_LOGGED_IN ||
mutex_lock(&session->eh_mutex);
spin_lock_bh(&session->lock);
- if (session->state == ISCSI_STATE_LOGGED_IN)
- iscsi_session_printk(KERN_INFO, session,
- "target reset succeeded\n");
- else
+ if (session->state == ISCSI_STATE_LOGGED_IN) {
+ ISCSI_DBG_EH(session,
+ "target reset succeeded\n");
+ } else
goto failed;
spin_unlock_bh(&session->lock);
mutex_unlock(&session->eh_mutex);
spin_lock(&session->lock);
if (conn->tmf_state == TMF_QUEUED) {
conn->tmf_state = TMF_TIMEDOUT;
- ISCSI_DBG_SESSION(session, "tmf timedout\n");
+ ISCSI_DBG_EH(session, "tmf timedout\n");
/* unblock eh_abort() */
wake_up(&conn->ehwait);
}
spin_unlock_bh(&session->lock);
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
spin_lock_bh(&session->lock);
- ISCSI_DBG_SESSION(session, "tmf exec failure\n");
+ ISCSI_DBG_EH(session, "tmf exec failure\n");
return -EPERM;
}
conn->tmfcmd_pdus_cnt++;
conn->tmf_timer.function = iscsi_tmf_timedout;
conn->tmf_timer.data = (unsigned long)conn;
add_timer(&conn->tmf_timer);
- ISCSI_DBG_SESSION(session, "tmf set timeout\n");
+ ISCSI_DBG_EH(session, "tmf set timeout\n");
spin_unlock_bh(&session->lock);
mutex_unlock(&session->eh_mutex);
* Fail commands. session lock held and recv side suspended and xmit
* thread flushed
*/
-static void fail_all_commands(struct iscsi_conn *conn, unsigned lun,
- int error)
+static void fail_scsi_tasks(struct iscsi_conn *conn, unsigned lun,
+ int error)
{
- struct iscsi_task *task, *tmp;
+ struct iscsi_task *task;
+ int i;
- if (conn->task) {
- if (lun == -1 ||
- (conn->task->sc && conn->task->sc->device->lun == lun))
- conn->task = NULL;
- }
+ for (i = 0; i < conn->session->cmds_max; i++) {
+ task = conn->session->cmds[i];
+ if (!task->sc || task->state == ISCSI_TASK_FREE)
+ continue;
- /* flush pending */
- list_for_each_entry_safe(task, tmp, &conn->xmitqueue, running) {
- if (lun == task->sc->device->lun || lun == -1) {
- ISCSI_DBG_SESSION(conn->session,
- "failing pending sc %p itt 0x%x\n",
- task->sc, task->itt);
- fail_command(conn, task, error << 16);
- }
- }
+ if (lun != -1 && lun != task->sc->device->lun)
+ continue;
- list_for_each_entry_safe(task, tmp, &conn->requeue, running) {
- if (lun == task->sc->device->lun || lun == -1) {
- ISCSI_DBG_SESSION(conn->session,
- "failing requeued sc %p itt 0x%x\n",
- task->sc, task->itt);
- fail_command(conn, task, error << 16);
- }
+ ISCSI_DBG_SESSION(conn->session,
+ "failing sc %p itt 0x%x state %d\n",
+ task->sc, task->itt, task->state);
+ fail_scsi_task(task, error);
}
+}
- /* fail all other running */
- list_for_each_entry_safe(task, tmp, &conn->run_list, running) {
- if (lun == task->sc->device->lun || lun == -1) {
- ISCSI_DBG_SESSION(conn->session,
- "failing in progress sc %p itt 0x%x\n",
- task->sc, task->itt);
- fail_command(conn, task, error << 16);
- }
- }
+/**
+ * iscsi_suspend_queue - suspend iscsi_queuecommand
+ * @conn: iscsi conn to stop queueing IO on
+ *
+ * This grabs the session lock to make sure no one is in
+ * xmit_task/queuecommand, and then sets suspend to prevent
+ * new commands from being queued. This only needs to be called
+ * by offload drivers that need to sync a path like ep disconnect
+ * with the iscsi_queuecommand/xmit_task. To start IO again libiscsi
+ * will call iscsi_start_tx and iscsi_unblock_session when in FFP.
+ */
+void iscsi_suspend_queue(struct iscsi_conn *conn)
+{
+ spin_lock_bh(&conn->session->lock);
+ set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
+ spin_unlock_bh(&conn->session->lock);
}
+EXPORT_SYMBOL_GPL(iscsi_suspend_queue);
+/**
+ * iscsi_suspend_tx - suspend iscsi_data_xmit
+ * @conn: iscsi conn tp stop processing IO on.
+ *
+ * This function sets the suspend bit to prevent iscsi_data_xmit
+ * from sending new IO, and if work is queued on the xmit thread
+ * it will wait for it to be completed.
+ */
void iscsi_suspend_tx(struct iscsi_conn *conn)
{
struct Scsi_Host *shost = conn->session->host;
struct iscsi_host *ihost = shost_priv(shost);
set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
- if (!(conn->session->tt->caps & CAP_DATA_PATH_OFFLOAD))
+ if (ihost->workq)
flush_workqueue(ihost->workq);
}
EXPORT_SYMBOL_GPL(iscsi_suspend_tx);
static void iscsi_start_tx(struct iscsi_conn *conn)
{
clear_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
- if (!(conn->session->tt->caps & CAP_DATA_PATH_OFFLOAD))
- iscsi_conn_queue_work(conn);
+ iscsi_conn_queue_work(conn);
}
-static enum blk_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *scmd)
+/*
+ * We want to make sure a ping is in flight. It has timed out.
+ * And we are not busy processing a pdu that is making
+ * progress but got started before the ping and is taking a while
+ * to complete so the ping is just stuck behind it in a queue.
+ */
+static int iscsi_has_ping_timed_out(struct iscsi_conn *conn)
{
+ if (conn->ping_task &&
+ time_before_eq(conn->last_recv + (conn->recv_timeout * HZ) +
+ (conn->ping_timeout * HZ), jiffies))
+ return 1;
+ else
+ return 0;
+}
+
+static enum blk_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *sc)
+{
+ enum blk_eh_timer_return rc = BLK_EH_NOT_HANDLED;
+ struct iscsi_task *task = NULL;
struct iscsi_cls_session *cls_session;
struct iscsi_session *session;
struct iscsi_conn *conn;
- enum blk_eh_timer_return rc = BLK_EH_NOT_HANDLED;
- cls_session = starget_to_session(scsi_target(scmd->device));
+ cls_session = starget_to_session(scsi_target(sc->device));
session = cls_session->dd_data;
- ISCSI_DBG_SESSION(session, "scsi cmd %p timedout\n", scmd);
+ ISCSI_DBG_EH(session, "scsi cmd %p timedout\n", sc);
spin_lock(&session->lock);
if (session->state != ISCSI_STATE_LOGGED_IN) {
goto done;
}
+ task = (struct iscsi_task *)sc->SCp.ptr;
+ if (!task)
+ goto done;
+ /*
+ * If we have sent (at least queued to the network layer) a pdu or
+ * recvd one for the task since the last timeout ask for
+ * more time. If on the next timeout we have not made progress
+ * we can check if it is the task or connection when we send the
+ * nop as a ping.
+ */
+ if (time_after_eq(task->last_xfer, task->last_timeout)) {
+ ISCSI_DBG_EH(session, "Command making progress. Asking "
+ "scsi-ml for more time to complete. "
+ "Last data recv at %lu. Last timeout was at "
+ "%lu\n.", task->last_xfer, task->last_timeout);
+ task->have_checked_conn = false;
+ rc = BLK_EH_RESET_TIMER;
+ goto done;
+ }
+
if (!conn->recv_timeout && !conn->ping_timeout)
goto done;
/*
* if the ping timedout then we are in the middle of cleaning up
* and can let the iscsi eh handle it
*/
- if (time_before_eq(conn->last_recv + (conn->recv_timeout * HZ) +
- (conn->ping_timeout * HZ), jiffies))
+ if (iscsi_has_ping_timed_out(conn)) {
rc = BLK_EH_RESET_TIMER;
+ goto done;
+ }
+
+ /* Assumes nop timeout is shorter than scsi cmd timeout */
+ if (task->have_checked_conn)
+ goto done;
+
/*
- * if we are about to check the transport then give the command
- * more time
+ * Checking the transport already or nop from a cmd timeout still
+ * running
*/
- if (time_before_eq(conn->last_recv + (conn->recv_timeout * HZ),
- jiffies))
- rc = BLK_EH_RESET_TIMER;
- /* if in the middle of checking the transport then give us more time */
- if (conn->ping_task)
+ if (conn->ping_task) {
+ task->have_checked_conn = true;
rc = BLK_EH_RESET_TIMER;
+ goto done;
+ }
+
+ /* Make sure there is a transport check done */
+ iscsi_send_nopout(conn, NULL);
+ task->have_checked_conn = true;
+ rc = BLK_EH_RESET_TIMER;
+
done:
+ if (task)
+ task->last_timeout = jiffies;
spin_unlock(&session->lock);
- ISCSI_DBG_SESSION(session, "return %s\n", rc == BLK_EH_RESET_TIMER ?
- "timer reset" : "nh");
+ ISCSI_DBG_EH(session, "return %s\n", rc == BLK_EH_RESET_TIMER ?
+ "timer reset" : "nh");
return rc;
}
recv_timeout *= HZ;
last_recv = conn->last_recv;
- if (conn->ping_task &&
- time_before_eq(conn->last_ping + (conn->ping_timeout * HZ),
- jiffies)) {
+
+ if (iscsi_has_ping_timed_out(conn)) {
iscsi_conn_printk(KERN_ERR, conn, "ping timeout of %d secs "
- "expired, last rx %lu, last ping %lu, "
- "now %lu\n", conn->ping_timeout, last_recv,
- conn->last_ping, jiffies);
+ "expired, recv timeout %d, last rx %lu, "
+ "last ping %lu, now %lu\n",
+ conn->ping_timeout, conn->recv_timeout,
+ last_recv, conn->last_ping, jiffies);
spin_unlock(&session->lock);
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
return;
cls_session = starget_to_session(scsi_target(sc->device));
session = cls_session->dd_data;
+ ISCSI_DBG_EH(session, "aborting sc %p\n", sc);
+
mutex_lock(&session->eh_mutex);
spin_lock_bh(&session->lock);
/*
* got the command.
*/
if (!sc->SCp.ptr) {
- ISCSI_DBG_SESSION(session, "sc never reached iscsi layer or "
- "it completed.\n");
+ ISCSI_DBG_EH(session, "sc never reached iscsi layer or "
+ "it completed.\n");
spin_unlock_bh(&session->lock);
mutex_unlock(&session->eh_mutex);
return SUCCESS;
sc->SCp.phase != session->age) {
spin_unlock_bh(&session->lock);
mutex_unlock(&session->eh_mutex);
+ ISCSI_DBG_EH(session, "failing abort due to dropped "
+ "session.\n");
return FAILED;
}
age = session->age;
task = (struct iscsi_task *)sc->SCp.ptr;
- ISCSI_DBG_SESSION(session, "aborting [sc %p itt 0x%x]\n",
- sc, task->itt);
+ ISCSI_DBG_EH(session, "aborting [sc %p itt 0x%x]\n",
+ sc, task->itt);
/* task completed before time out */
if (!task->sc) {
- ISCSI_DBG_SESSION(session, "sc completed while abort in "
- "progress\n");
+ ISCSI_DBG_EH(session, "sc completed while abort in progress\n");
goto success;
}
if (task->state == ISCSI_TASK_PENDING) {
- fail_command(conn, task, DID_ABORT << 16);
+ fail_scsi_task(task, DID_ABORT);
goto success;
}
* good and have never sent us a successful tmf response
* then sent more data for the cmd.
*/
- spin_lock(&session->lock);
- fail_command(conn, task, DID_ABORT << 16);
+ spin_lock_bh(&session->lock);
+ fail_scsi_task(task, DID_ABORT);
conn->tmf_state = TMF_INITIAL;
- spin_unlock(&session->lock);
+ spin_unlock_bh(&session->lock);
iscsi_start_tx(conn);
goto success_unlocked;
case TMF_TIMEDOUT:
if (!sc->SCp.ptr) {
conn->tmf_state = TMF_INITIAL;
/* task completed before tmf abort response */
- ISCSI_DBG_SESSION(session, "sc completed while abort "
- "in progress\n");
+ ISCSI_DBG_EH(session, "sc completed while abort in "
+ "progress\n");
goto success;
}
/* fall through */
success:
spin_unlock_bh(&session->lock);
success_unlocked:
- ISCSI_DBG_SESSION(session, "abort success [sc %p itt 0x%x]\n",
- sc, task->itt);
+ ISCSI_DBG_EH(session, "abort success [sc %p itt 0x%x]\n",
+ sc, task->itt);
mutex_unlock(&session->eh_mutex);
return SUCCESS;
failed:
spin_unlock_bh(&session->lock);
failed_unlocked:
- ISCSI_DBG_SESSION(session, "abort failed [sc %p itt 0x%x]\n", sc,
- task ? task->itt : 0);
+ ISCSI_DBG_EH(session, "abort failed [sc %p itt 0x%x]\n", sc,
+ task ? task->itt : 0);
mutex_unlock(&session->eh_mutex);
return FAILED;
}
cls_session = starget_to_session(scsi_target(sc->device));
session = cls_session->dd_data;
- ISCSI_DBG_SESSION(session, "LU Reset [sc %p lun %u]\n",
- sc, sc->device->lun);
+ ISCSI_DBG_EH(session, "LU Reset [sc %p lun %u]\n", sc, sc->device->lun);
mutex_lock(&session->eh_mutex);
spin_lock_bh(&session->lock);
iscsi_suspend_tx(conn);
spin_lock_bh(&session->lock);
- fail_all_commands(conn, sc->device->lun, DID_ERROR);
+ fail_scsi_tasks(conn, sc->device->lun, DID_ERROR);
conn->tmf_state = TMF_INITIAL;
spin_unlock_bh(&session->lock);
unlock:
spin_unlock_bh(&session->lock);
done:
- ISCSI_DBG_SESSION(session, "dev reset result = %s\n",
- rc == SUCCESS ? "SUCCESS" : "FAILED");
+ ISCSI_DBG_EH(session, "dev reset result = %s\n",
+ rc == SUCCESS ? "SUCCESS" : "FAILED");
mutex_unlock(&session->eh_mutex);
return rc;
}
*/
struct iscsi_cls_session *
iscsi_session_setup(struct iscsi_transport *iscsit, struct Scsi_Host *shost,
- uint16_t cmds_max, int cmd_task_size,
+ uint16_t cmds_max, int dd_size, int cmd_task_size,
uint32_t initial_cmdsn, unsigned int id)
{
struct iscsi_host *ihost = shost_priv(shost);
scsi_cmds = total_cmds - ISCSI_MGMT_CMDS_MAX;
cls_session = iscsi_alloc_session(shost, iscsit,
- sizeof(struct iscsi_session));
+ sizeof(struct iscsi_session) +
+ dd_size);
if (!cls_session)
goto dec_session_count;
session = cls_session->dd_data;
session->max_cmdsn = initial_cmdsn + 1;
session->max_r2t = 1;
session->tt = iscsit;
+ session->dd_data = cls_session->dd_data + sizeof(*session);
mutex_init(&session->eh_mutex);
spin_lock_init(&session->lock);
if (cmd_task_size)
task->dd_data = &task[1];
task->itt = cmd_i;
+ task->state = ISCSI_TASK_FREE;
INIT_LIST_HEAD(&task->running);
}
conn->transport_timer.data = (unsigned long)conn;
conn->transport_timer.function = iscsi_check_transport_timeouts;
- INIT_LIST_HEAD(&conn->run_list);
- INIT_LIST_HEAD(&conn->mgmt_run_list);
INIT_LIST_HEAD(&conn->mgmtqueue);
- INIT_LIST_HEAD(&conn->xmitqueue);
+ INIT_LIST_HEAD(&conn->cmdqueue);
INIT_LIST_HEAD(&conn->requeue);
INIT_WORK(&conn->xmitwork, iscsi_xmitworker);
EXPORT_SYMBOL_GPL(iscsi_conn_start);
static void
-flush_control_queues(struct iscsi_session *session, struct iscsi_conn *conn)
+fail_mgmt_tasks(struct iscsi_session *session, struct iscsi_conn *conn)
{
- struct iscsi_task *task, *tmp;
+ struct iscsi_task *task;
+ int i, state;
- /* handle pending */
- list_for_each_entry_safe(task, tmp, &conn->mgmtqueue, running) {
- ISCSI_DBG_SESSION(session, "flushing pending mgmt task "
- "itt 0x%x\n", task->itt);
- /* release ref from prep task */
- __iscsi_put_task(task);
- }
+ for (i = 0; i < conn->session->cmds_max; i++) {
+ task = conn->session->cmds[i];
+ if (task->sc)
+ continue;
- /* handle running */
- list_for_each_entry_safe(task, tmp, &conn->mgmt_run_list, running) {
- ISCSI_DBG_SESSION(session, "flushing running mgmt task "
- "itt 0x%x\n", task->itt);
- /* release ref from prep task */
- __iscsi_put_task(task);
- }
+ if (task->state == ISCSI_TASK_FREE)
+ continue;
- conn->task = NULL;
+ ISCSI_DBG_SESSION(conn->session,
+ "failing mgmt itt 0x%x state %d\n",
+ task->itt, task->state);
+ state = ISCSI_TASK_ABRT_SESS_RECOV;
+ if (task->state == ISCSI_TASK_PENDING)
+ state = ISCSI_TASK_COMPLETED;
+ iscsi_complete_task(task, state);
+
+ }
}
static void iscsi_start_session_recovery(struct iscsi_session *session,
{
int old_stop_stage;
- del_timer_sync(&conn->transport_timer);
-
mutex_lock(&session->eh_mutex);
spin_lock_bh(&session->lock);
if (conn->stop_stage == STOP_CONN_TERM) {
session->state = ISCSI_STATE_TERMINATE;
else if (conn->stop_stage != STOP_CONN_RECOVER)
session->state = ISCSI_STATE_IN_RECOVERY;
+ spin_unlock_bh(&session->lock);
+
+ del_timer_sync(&conn->transport_timer);
+ iscsi_suspend_tx(conn);
+ spin_lock_bh(&session->lock);
old_stop_stage = conn->stop_stage;
conn->stop_stage = flag;
conn->c_stage = ISCSI_CONN_STOPPED;
spin_unlock_bh(&session->lock);
- iscsi_suspend_tx(conn);
/*
* for connection level recovery we should not calculate
* header digest. conn->hdr_size used for optimization
* flush queues.
*/
spin_lock_bh(&session->lock);
- if (flag == STOP_CONN_RECOVER)
- fail_all_commands(conn, -1, DID_TRANSPORT_DISRUPTED);
- else
- fail_all_commands(conn, -1, DID_ERROR);
- flush_control_queues(session, conn);
+ fail_scsi_tasks(conn, -1, DID_TRANSPORT_DISRUPTED);
+ fail_mgmt_tasks(session, conn);
spin_unlock_bh(&session->lock);
mutex_unlock(&session->eh_mutex);
}
}
EXPORT_SYMBOL_GPL(iscsi_conn_bind);
+static int iscsi_switch_str_param(char **param, char *new_val_buf)
+{
+ char *new_val;
+
+ if (*param) {
+ if (!strcmp(*param, new_val_buf))
+ return 0;
+ }
+
+ new_val = kstrdup(new_val_buf, GFP_NOIO);
+ if (!new_val)
+ return -ENOMEM;
+
+ kfree(*param);
+ *param = new_val;
+ return 0;
+}
int iscsi_set_param(struct iscsi_cls_conn *cls_conn,
enum iscsi_param param, char *buf, int buflen)
sscanf(buf, "%u", &conn->exp_statsn);
break;
case ISCSI_PARAM_USERNAME:
- kfree(session->username);
- session->username = kstrdup(buf, GFP_KERNEL);
- if (!session->username)
- return -ENOMEM;
- break;
+ return iscsi_switch_str_param(&session->username, buf);
case ISCSI_PARAM_USERNAME_IN:
- kfree(session->username_in);
- session->username_in = kstrdup(buf, GFP_KERNEL);
- if (!session->username_in)
- return -ENOMEM;
- break;
+ return iscsi_switch_str_param(&session->username_in, buf);
case ISCSI_PARAM_PASSWORD:
- kfree(session->password);
- session->password = kstrdup(buf, GFP_KERNEL);
- if (!session->password)
- return -ENOMEM;
- break;
+ return iscsi_switch_str_param(&session->password, buf);
case ISCSI_PARAM_PASSWORD_IN:
- kfree(session->password_in);
- session->password_in = kstrdup(buf, GFP_KERNEL);
- if (!session->password_in)
- return -ENOMEM;
- break;
+ return iscsi_switch_str_param(&session->password_in, buf);
case ISCSI_PARAM_TARGET_NAME:
- /* this should not change between logins */
- if (session->targetname)
- break;
-
- session->targetname = kstrdup(buf, GFP_KERNEL);
- if (!session->targetname)
- return -ENOMEM;
- break;
+ return iscsi_switch_str_param(&session->targetname, buf);
case ISCSI_PARAM_TPGT:
sscanf(buf, "%d", &session->tpgt);
break;
sscanf(buf, "%d", &conn->persistent_port);
break;
case ISCSI_PARAM_PERSISTENT_ADDRESS:
- /*
- * this is the address returned in discovery so it should
- * not change between logins.
- */
- if (conn->persistent_address)
- break;
-
- conn->persistent_address = kstrdup(buf, GFP_KERNEL);
- if (!conn->persistent_address)
- return -ENOMEM;
- break;
+ return iscsi_switch_str_param(&conn->persistent_address, buf);
case ISCSI_PARAM_IFACE_NAME:
- if (!session->ifacename)
- session->ifacename = kstrdup(buf, GFP_KERNEL);
- break;
+ return iscsi_switch_str_param(&session->ifacename, buf);
case ISCSI_PARAM_INITIATOR_NAME:
- if (!session->initiatorname)
- session->initiatorname = kstrdup(buf, GFP_KERNEL);
- break;
+ return iscsi_switch_str_param(&session->initiatorname, buf);
default:
return -ENOSYS;
}
len = sprintf(buf, "%s\n", session->ifacename);
break;
case ISCSI_PARAM_INITIATOR_NAME:
- if (!session->initiatorname)
- len = sprintf(buf, "%s\n", "unknown");
- else
- len = sprintf(buf, "%s\n", session->initiatorname);
+ len = sprintf(buf, "%s\n", session->initiatorname);
break;
default:
return -ENOSYS;
switch (param) {
case ISCSI_HOST_PARAM_NETDEV_NAME:
- if (!ihost->netdev)
- len = sprintf(buf, "%s\n", "default");
- else
- len = sprintf(buf, "%s\n", ihost->netdev);
+ len = sprintf(buf, "%s\n", ihost->netdev);
break;
case ISCSI_HOST_PARAM_HWADDRESS:
- if (!ihost->hwaddress)
- len = sprintf(buf, "%s\n", "default");
- else
- len = sprintf(buf, "%s\n", ihost->hwaddress);
+ len = sprintf(buf, "%s\n", ihost->hwaddress);
break;
case ISCSI_HOST_PARAM_INITIATOR_NAME:
- if (!ihost->initiatorname)
- len = sprintf(buf, "%s\n", "unknown");
- else
- len = sprintf(buf, "%s\n", ihost->initiatorname);
+ len = sprintf(buf, "%s\n", ihost->initiatorname);
break;
case ISCSI_HOST_PARAM_IPADDRESS:
- if (!strlen(ihost->local_address))
- len = sprintf(buf, "%s\n", "unknown");
- else
- len = sprintf(buf, "%s\n",
- ihost->local_address);
+ len = sprintf(buf, "%s\n", ihost->local_address);
break;
default:
return -ENOSYS;
switch (param) {
case ISCSI_HOST_PARAM_NETDEV_NAME:
- if (!ihost->netdev)
- ihost->netdev = kstrdup(buf, GFP_KERNEL);
- break;
+ return iscsi_switch_str_param(&ihost->netdev, buf);
case ISCSI_HOST_PARAM_HWADDRESS:
- if (!ihost->hwaddress)
- ihost->hwaddress = kstrdup(buf, GFP_KERNEL);
- break;
+ return iscsi_switch_str_param(&ihost->hwaddress, buf);
case ISCSI_HOST_PARAM_INITIATOR_NAME:
- if (!ihost->initiatorname)
- ihost->initiatorname = kstrdup(buf, GFP_KERNEL);
- break;
+ return iscsi_switch_str_param(&ihost->initiatorname, buf);
default:
return -ENOSYS;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff