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path: root/drivers/scsi/libiscsi.c
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Diffstat (limited to 'drivers/scsi/libiscsi.c')
-rw-r--r--drivers/scsi/libiscsi.c647
1 files changed, 453 insertions, 194 deletions
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index c28a712fd4d..3d1bc67bac9 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -25,6 +25,8 @@
#include <linux/kfifo.h>
#include <linux/delay.h>
#include <linux/log2.h>
+#include <linux/slab.h>
+#include <linux/module.h>
#include <asm/unaligned.h>
#include <net/tcp.h>
#include <scsi/scsi_cmnd.h>
@@ -83,22 +85,6 @@ MODULE_PARM_DESC(debug_libiscsi_eh,
__func__, ##arg); \
} while (0);
-/* Serial Number Arithmetic, 32 bits, less than, RFC1982 */
-#define SNA32_CHECK 2147483648UL
-
-static int iscsi_sna_lt(u32 n1, u32 n2)
-{
- return n1 != n2 && ((n1 < n2 && (n2 - n1 < SNA32_CHECK)) ||
- (n1 > n2 && (n2 - n1 < SNA32_CHECK)));
-}
-
-/* Serial Number Arithmetic, 32 bits, less than, RFC1982 */
-static int iscsi_sna_lte(u32 n1, u32 n2)
-{
- return n1 == n2 || ((n1 < n2 && (n2 - n1 < SNA32_CHECK)) ||
- (n1 > n2 && (n2 - n1 < SNA32_CHECK)));
-}
-
inline void iscsi_conn_queue_work(struct iscsi_conn *conn)
{
struct Scsi_Host *shost = conn->session->host;
@@ -124,16 +110,8 @@ static void __iscsi_update_cmdsn(struct iscsi_session *session,
session->exp_cmdsn = exp_cmdsn;
if (max_cmdsn != session->max_cmdsn &&
- !iscsi_sna_lt(max_cmdsn, session->max_cmdsn)) {
+ !iscsi_sna_lt(max_cmdsn, session->max_cmdsn))
session->max_cmdsn = max_cmdsn;
- /*
- * if the window closed with IO queued, then kick the
- * xmit thread
- */
- 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)
@@ -168,7 +146,7 @@ void iscsi_prep_data_out_pdu(struct iscsi_task *task, struct iscsi_r2t_info *r2t
hdr->datasn = cpu_to_be32(r2t->datasn);
r2t->datasn++;
hdr->opcode = ISCSI_OP_SCSI_DATA_OUT;
- memcpy(hdr->lun, task->lun, sizeof(hdr->lun));
+ hdr->lun = task->lun;
hdr->itt = task->hdr_itt;
hdr->exp_statsn = r2t->exp_statsn;
hdr->offset = cpu_to_be32(r2t->data_offset + r2t->sent);
@@ -295,7 +273,7 @@ static int iscsi_check_tmf_restrictions(struct iscsi_task *task, int opcode)
/*
* Allow PDUs for unrelated LUNs
*/
- hdr_lun = scsilun_to_int((struct scsi_lun *)tmf->lun);
+ hdr_lun = scsilun_to_int(&tmf->lun);
if (hdr_lun != task->sc->device->lun)
return 0;
/* fall through */
@@ -359,8 +337,8 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_task *task)
struct iscsi_conn *conn = task->conn;
struct iscsi_session *session = conn->session;
struct scsi_cmnd *sc = task->sc;
- struct iscsi_cmd *hdr;
- unsigned hdrlength, cmd_len;
+ struct iscsi_scsi_req *hdr;
+ unsigned hdrlength, cmd_len, transfer_length;
itt_t itt;
int rc;
@@ -373,7 +351,7 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_task *task)
if (rc)
return rc;
}
- hdr = (struct iscsi_cmd *) task->hdr;
+ hdr = (struct iscsi_scsi_req *)task->hdr;
itt = hdr->itt;
memset(hdr, 0, sizeof(*hdr));
@@ -388,8 +366,8 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_task *task)
return rc;
hdr->opcode = ISCSI_OP_SCSI_CMD;
hdr->flags = ISCSI_ATTR_SIMPLE;
- int_to_scsilun(sc->device->lun, (struct scsi_lun *)hdr->lun);
- memcpy(task->lun, hdr->lun, sizeof(task->lun));
+ int_to_scsilun(sc->device->lun, &hdr->lun);
+ task->lun = hdr->lun;
hdr->exp_statsn = cpu_to_be32(conn->exp_statsn);
cmd_len = sc->cmd_len;
if (cmd_len < ISCSI_CDB_SIZE)
@@ -409,11 +387,15 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_task *task)
if (rc)
return rc;
}
+
+ if (scsi_get_prot_op(sc) != SCSI_PROT_NORMAL)
+ task->protected = true;
+
+ transfer_length = scsi_transfer_length(sc);
+ hdr->data_length = cpu_to_be32(transfer_length);
if (sc->sc_data_direction == DMA_TO_DEVICE) {
- unsigned out_len = scsi_out(sc)->length;
struct iscsi_r2t_info *r2t = &task->unsol_r2t;
- hdr->data_length = cpu_to_be32(out_len);
hdr->flags |= ISCSI_FLAG_CMD_WRITE;
/*
* Write counters:
@@ -432,18 +414,19 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_task *task)
memset(r2t, 0, sizeof(*r2t));
if (session->imm_data_en) {
- if (out_len >= session->first_burst)
+ if (transfer_length >= session->first_burst)
task->imm_count = min(session->first_burst,
conn->max_xmit_dlength);
else
- task->imm_count = min(out_len,
- conn->max_xmit_dlength);
+ task->imm_count = min(transfer_length,
+ conn->max_xmit_dlength);
hton24(hdr->dlength, task->imm_count);
} else
zero_data(hdr->dlength);
if (!session->initial_r2t_en) {
- r2t->data_length = min(session->first_burst, out_len) -
+ r2t->data_length = min(session->first_burst,
+ transfer_length) -
task->imm_count;
r2t->data_offset = task->imm_count;
r2t->ttt = cpu_to_be32(ISCSI_RESERVED_TAG);
@@ -456,7 +439,6 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_task *task)
} else {
hdr->flags |= ISCSI_FLAG_CMD_FINAL;
zero_data(hdr->dlength);
- hdr->data_length = cpu_to_be32(scsi_in(sc)->length);
if (sc->sc_data_direction == DMA_FROM_DEVICE)
hdr->flags |= ISCSI_FLAG_CMD_READ;
@@ -470,12 +452,12 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_task *task)
WARN_ON(hdrlength >= 256);
hdr->hlength = hdrlength & 0xFF;
+ hdr->cmdsn = task->cmdsn = cpu_to_be32(session->cmdsn);
if (session->tt->init_task && session->tt->init_task(task))
return -EIO;
task->state = ISCSI_TASK_RUNNING;
- hdr->cmdsn = task->cmdsn = cpu_to_be32(session->cmdsn);
session->cmdsn++;
conn->scsicmd_pdus_cnt++;
@@ -484,7 +466,7 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_task *task)
scsi_bidi_cmnd(sc) ? "bidirectional" :
sc->sc_data_direction == DMA_TO_DEVICE ?
"write" : "read", conn->id, sc, sc->cmnd[0],
- task->itt, scsi_bufflen(sc),
+ task->itt, transfer_length,
scsi_bidi_cmnd(sc) ? scsi_in(sc)->length : 0,
session->cmdsn,
session->max_cmdsn - session->exp_cmdsn + 1);
@@ -495,7 +477,7 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_task *task)
* iscsi_free_task - free a task
* @task: iscsi cmd task
*
- * Must be called with session lock.
+ * Must be called with session back_lock.
* This function returns the scsi command to scsi-ml or cleans
* up mgmt tasks then returns the task to the pool.
*/
@@ -504,6 +486,7 @@ 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;
+ int oldstate = task->state;
ISCSI_DBG_SESSION(session, "freeing task itt 0x%x state %d sc %p\n",
task->itt, task->state, task->sc);
@@ -520,14 +503,13 @@ static void iscsi_free_task(struct iscsi_task *task)
kfifo_in(&session->cmdpool.queue, (void*)&task, sizeof(void*));
if (sc) {
- task->sc = NULL;
/* SCSI eh reuses commands to verify us */
sc->SCp.ptr = NULL;
/*
- * queue command may call this to free the task, but
- * not have setup the sc callback
+ * queue command may call this to free the task, so
+ * it will decide how to return sc to scsi-ml.
*/
- if (sc->scsi_done)
+ if (oldstate != ISCSI_TASK_REQUEUE_SCSIQ)
sc->scsi_done(sc);
}
}
@@ -538,19 +520,21 @@ void __iscsi_get_task(struct iscsi_task *task)
}
EXPORT_SYMBOL_GPL(__iscsi_get_task);
-static void __iscsi_put_task(struct iscsi_task *task)
+void __iscsi_put_task(struct iscsi_task *task)
{
if (atomic_dec_and_test(&task->refcount))
iscsi_free_task(task);
}
+EXPORT_SYMBOL_GPL(__iscsi_put_task);
void iscsi_put_task(struct iscsi_task *task)
{
struct iscsi_session *session = task->conn->session;
- spin_lock_bh(&session->lock);
+ /* regular RX path uses back_lock */
+ spin_lock_bh(&session->back_lock);
__iscsi_put_task(task);
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->back_lock);
}
EXPORT_SYMBOL_GPL(iscsi_put_task);
@@ -559,7 +543,7 @@ EXPORT_SYMBOL_GPL(iscsi_put_task);
* @task: iscsi cmd task
* @state: state to complete task with
*
- * Must be called with session lock.
+ * Must be called with session back_lock.
*/
static void iscsi_complete_task(struct iscsi_task *task, int state)
{
@@ -570,7 +554,8 @@ static void iscsi_complete_task(struct iscsi_task *task, int state)
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)
+ task->state == ISCSI_TASK_ABRT_SESS_RECOV ||
+ task->state == ISCSI_TASK_REQUEUE_SCSIQ)
return;
WARN_ON_ONCE(task->state == ISCSI_TASK_FREE);
task->state = state;
@@ -597,7 +582,7 @@ static void iscsi_complete_task(struct iscsi_task *task, int state)
* This is used when drivers do not need or cannot perform
* lower level pdu processing.
*
- * Called with session lock
+ * Called with session back_lock
*/
void iscsi_complete_scsi_task(struct iscsi_task *task,
uint32_t exp_cmdsn, uint32_t max_cmdsn)
@@ -614,7 +599,7 @@ EXPORT_SYMBOL_GPL(iscsi_complete_scsi_task);
/*
- * session lock must be held and if not called for a task that is
+ * session back_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.
*/
@@ -654,7 +639,10 @@ static void fail_scsi_task(struct iscsi_task *task, int err)
scsi_in(sc)->resid = scsi_in(sc)->length;
}
+ /* regular RX path uses back_lock */
+ spin_lock_bh(&conn->session->back_lock);
iscsi_complete_task(task, state);
+ spin_unlock_bh(&conn->session->back_lock);
}
static int iscsi_prep_mgmt_task(struct iscsi_conn *conn,
@@ -792,7 +780,10 @@ __iscsi_conn_send_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
return task;
free_task:
+ /* regular RX path uses back_lock */
+ spin_lock_bh(&session->back_lock);
__iscsi_put_task(task);
+ spin_unlock_bh(&session->back_lock);
return NULL;
}
@@ -803,10 +794,10 @@ int iscsi_conn_send_pdu(struct iscsi_cls_conn *cls_conn, struct iscsi_hdr *hdr,
struct iscsi_session *session = conn->session;
int err = 0;
- spin_lock_bh(&session->lock);
+ spin_lock_bh(&session->frwd_lock);
if (!__iscsi_conn_send_pdu(conn, hdr, data, data_size))
err = -EPERM;
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
return err;
}
EXPORT_SYMBOL_GPL(iscsi_conn_send_pdu);
@@ -826,7 +817,7 @@ static void iscsi_scsi_cmd_rsp(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
struct iscsi_task *task, char *data,
int datalen)
{
- struct iscsi_cmd_rsp *rhdr = (struct iscsi_cmd_rsp *)hdr;
+ struct iscsi_scsi_rsp *rhdr = (struct iscsi_scsi_rsp *)hdr;
struct iscsi_session *session = conn->session;
struct scsi_cmnd *sc = task->sc;
@@ -835,6 +826,33 @@ static void iscsi_scsi_cmd_rsp(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
sc->result = (DID_OK << 16) | rhdr->cmd_status;
+ if (task->protected) {
+ sector_t sector;
+ u8 ascq;
+
+ /**
+ * Transports that didn't implement check_protection
+ * callback but still published T10-PI support to scsi-mid
+ * deserve this BUG_ON.
+ **/
+ BUG_ON(!session->tt->check_protection);
+
+ ascq = session->tt->check_protection(task, &sector);
+ if (ascq) {
+ sc->result = DRIVER_SENSE << 24 |
+ SAM_STAT_CHECK_CONDITION;
+ scsi_build_sense_buffer(1, sc->sense_buffer,
+ ILLEGAL_REQUEST, 0x10, ascq);
+ sc->sense_buffer[7] = 0xc; /* Additional sense length */
+ sc->sense_buffer[8] = 0; /* Information desc type */
+ sc->sense_buffer[9] = 0xa; /* Additional desc length */
+ sc->sense_buffer[10] = 0x80; /* Validity bit */
+
+ put_unaligned_be64(sector, &sc->sense_buffer[12]);
+ goto out;
+ }
+ }
+
if (rhdr->response != ISCSI_STATUS_CMD_COMPLETED) {
sc->result = DID_ERROR << 16;
goto out;
@@ -964,7 +982,7 @@ static void iscsi_send_nopout(struct iscsi_conn *conn, struct iscsi_nopin *rhdr)
hdr.flags = ISCSI_FLAG_CMD_FINAL;
if (rhdr) {
- memcpy(hdr.lun, rhdr->lun, 8);
+ hdr.lun = rhdr->lun;
hdr.ttt = rhdr->ttt;
hdr.itt = RESERVED_ITT;
} else
@@ -1025,13 +1043,13 @@ static int iscsi_handle_reject(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
iscsi_conn_printk(KERN_ERR, conn,
"pdu (op 0x%x itt 0x%x) rejected "
"due to DataDigest error.\n",
- rejected_pdu.itt, opcode);
+ opcode, rejected_pdu.itt);
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);
+ opcode, rejected_pdu.itt);
/*
* We only send one TMF at a time so if the target could not
* handle it, then it should get fixed (RFC mandates that
@@ -1043,14 +1061,19 @@ static int iscsi_handle_reject(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
if (opcode != ISCSI_OP_NOOP_OUT)
return 0;
- if (rejected_pdu.itt == cpu_to_be32(ISCSI_RESERVED_TAG))
+ if (rejected_pdu.itt == cpu_to_be32(ISCSI_RESERVED_TAG)) {
/*
* nop-out in response to target's nop-out rejected.
* Just resend.
*/
+ /* In RX path we are under back lock */
+ spin_unlock(&conn->session->back_lock);
+ spin_lock(&conn->session->frwd_lock);
iscsi_send_nopout(conn,
(struct iscsi_nopin*)&rejected_pdu);
- else {
+ spin_unlock(&conn->session->frwd_lock);
+ spin_lock(&conn->session->back_lock);
+ } else {
struct iscsi_task *task;
/*
* Our nop as ping got dropped. We know the target
@@ -1071,8 +1094,8 @@ static int iscsi_handle_reject(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
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);
+ "code 0x%x\n", rejected_pdu.opcode,
+ rejected_pdu.itt, reject->reason);
break;
}
return rc;
@@ -1086,7 +1109,7 @@ static int iscsi_handle_reject(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
* This should be used for mgmt tasks like login and nops, or if
* the LDD's itt space does not include the session age.
*
- * The session lock must be held.
+ * The session back_lock must be held.
*/
struct iscsi_task *iscsi_itt_to_task(struct iscsi_conn *conn, itt_t itt)
{
@@ -1115,7 +1138,7 @@ EXPORT_SYMBOL_GPL(iscsi_itt_to_task);
* @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
+ * queuecommand or send generic. session back_lock must be held and verify
* itt must have been called.
*/
int __iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
@@ -1152,7 +1175,12 @@ int __iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
if (hdr->ttt == cpu_to_be32(ISCSI_RESERVED_TAG))
break;
+ /* In RX path we are under back lock */
+ spin_unlock(&session->back_lock);
+ spin_lock(&session->frwd_lock);
iscsi_send_nopout(conn, (struct iscsi_nopin*)hdr);
+ spin_unlock(&session->frwd_lock);
+ spin_lock(&session->back_lock);
break;
case ISCSI_OP_REJECT:
rc = iscsi_handle_reject(conn, hdr, data, datalen);
@@ -1259,9 +1287,9 @@ int iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
{
int rc;
- spin_lock(&conn->session->lock);
+ spin_lock(&conn->session->back_lock);
rc = __iscsi_complete_pdu(conn, hdr, data, datalen);
- spin_unlock(&conn->session->lock);
+ spin_unlock(&conn->session->back_lock);
return rc;
}
EXPORT_SYMBOL_GPL(iscsi_complete_pdu);
@@ -1305,7 +1333,7 @@ EXPORT_SYMBOL_GPL(iscsi_verify_itt);
*
* This should be used for cmd tasks.
*
- * The session lock must be held.
+ * The session back_lock must be held.
*/
struct iscsi_task *iscsi_itt_to_ctask(struct iscsi_conn *conn, itt_t itt)
{
@@ -1334,17 +1362,16 @@ void iscsi_session_failure(struct iscsi_session *session,
{
struct iscsi_conn *conn;
struct device *dev;
- unsigned long flags;
- spin_lock_irqsave(&session->lock, flags);
+ spin_lock_bh(&session->frwd_lock);
conn = session->leadconn;
if (session->state == ISCSI_STATE_TERMINATE || !conn) {
- spin_unlock_irqrestore(&session->lock, flags);
+ spin_unlock_bh(&session->frwd_lock);
return;
}
dev = get_device(&conn->cls_conn->dev);
- spin_unlock_irqrestore(&session->lock, flags);
+ spin_unlock_bh(&session->frwd_lock);
if (!dev)
return;
/*
@@ -1363,17 +1390,16 @@ EXPORT_SYMBOL_GPL(iscsi_session_failure);
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);
+ spin_lock_bh(&session->frwd_lock);
if (session->state == ISCSI_STATE_FAILED) {
- spin_unlock_irqrestore(&session->lock, flags);
+ spin_unlock_bh(&session->frwd_lock);
return;
}
if (conn->stop_stage == 0)
session->state = ISCSI_STATE_FAILED;
- spin_unlock_irqrestore(&session->lock, flags);
+ spin_unlock_bh(&session->frwd_lock);
set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx);
@@ -1407,15 +1433,18 @@ static int iscsi_xmit_task(struct iscsi_conn *conn)
return -ENODATA;
__iscsi_get_task(task);
- spin_unlock_bh(&conn->session->lock);
+ spin_unlock_bh(&conn->session->frwd_lock);
rc = conn->session->tt->xmit_task(task);
- spin_lock_bh(&conn->session->lock);
+ spin_lock_bh(&conn->session->frwd_lock);
if (!rc) {
/* done with this task */
task->last_xfer = jiffies;
conn->task = NULL;
}
+ /* regular RX path uses back_lock */
+ spin_lock(&conn->session->back_lock);
__iscsi_put_task(task);
+ spin_unlock(&conn->session->back_lock);
return rc;
}
@@ -1424,7 +1453,7 @@ static int iscsi_xmit_task(struct iscsi_conn *conn)
* @task: task to requeue
*
* LLDs that need to run a task from the session workqueue should call
- * this. The session lock must be held. This should only be called
+ * this. The session frwd_lock must be held. This should only be called
* by software drivers.
*/
void iscsi_requeue_task(struct iscsi_task *task)
@@ -1455,10 +1484,10 @@ static int iscsi_data_xmit(struct iscsi_conn *conn)
struct iscsi_task *task;
int rc = 0;
- spin_lock_bh(&conn->session->lock);
+ spin_lock_bh(&conn->session->frwd_lock);
if (test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx)) {
ISCSI_DBG_SESSION(conn->session, "Tx suspended!\n");
- spin_unlock_bh(&conn->session->lock);
+ spin_unlock_bh(&conn->session->frwd_lock);
return -ENODATA;
}
@@ -1479,7 +1508,10 @@ check_mgmt:
struct iscsi_task, running);
list_del_init(&conn->task->running);
if (iscsi_prep_mgmt_task(conn, conn->task)) {
+ /* regular RX path uses back_lock */
+ spin_lock_bh(&conn->session->back_lock);
__iscsi_put_task(conn->task);
+ spin_unlock_bh(&conn->session->back_lock);
conn->task = NULL;
continue;
}
@@ -1541,11 +1573,11 @@ check_mgmt:
if (!list_empty(&conn->mgmtqueue))
goto check_mgmt;
}
- spin_unlock_bh(&conn->session->lock);
+ spin_unlock_bh(&conn->session->frwd_lock);
return -ENODATA;
done:
- spin_unlock_bh(&conn->session->lock);
+ spin_unlock_bh(&conn->session->frwd_lock);
return rc;
}
@@ -1581,6 +1613,7 @@ static inline struct iscsi_task *iscsi_alloc_task(struct iscsi_conn *conn,
task->have_checked_conn = false;
task->last_timeout = jiffies;
task->last_xfer = jiffies;
+ task->protected = false;
INIT_LIST_HEAD(&task->running);
return task;
}
@@ -1598,27 +1631,23 @@ enum {
FAILURE_SESSION_NOT_READY,
};
-int iscsi_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
+int iscsi_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *sc)
{
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;
struct iscsi_task *task = NULL;
- sc->scsi_done = done;
sc->result = 0;
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));
session = cls_session->dd_data;
- spin_lock(&session->lock);
+ spin_lock_bh(&session->frwd_lock);
reason = iscsi_session_chkready(cls_session);
if (reason) {
@@ -1704,25 +1733,21 @@ int iscsi_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
}
session->queued_cmdsn++;
- spin_unlock(&session->lock);
- spin_lock(host->host_lock);
+ spin_unlock_bh(&session->frwd_lock);
return 0;
prepd_reject:
- sc->scsi_done = NULL;
- iscsi_complete_task(task, ISCSI_TASK_COMPLETED);
+ iscsi_complete_task(task, ISCSI_TASK_REQUEUE_SCSIQ);
reject:
- spin_unlock(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
ISCSI_DBG_SESSION(session, "cmd 0x%x rejected (%d)\n",
sc->cmnd[0], reason);
- spin_lock(host->host_lock);
return SCSI_MLQUEUE_TARGET_BUSY;
prepd_fault:
- sc->scsi_done = NULL;
- iscsi_complete_task(task, ISCSI_TASK_COMPLETED);
+ iscsi_complete_task(task, ISCSI_TASK_REQUEUE_SCSIQ);
fault:
- spin_unlock(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
ISCSI_DBG_SESSION(session, "iscsi: cmd 0x%x is not queued (%d)\n",
sc->cmnd[0], reason);
if (!scsi_bidi_cmnd(sc))
@@ -1731,8 +1756,7 @@ fault:
scsi_out(sc)->resid = scsi_out(sc)->length;
scsi_in(sc)->resid = scsi_in(sc)->length;
}
- done(sc);
- spin_lock(host->host_lock);
+ sc->scsi_done(sc);
return 0;
}
EXPORT_SYMBOL_GPL(iscsi_queuecommand);
@@ -1771,14 +1795,14 @@ static void iscsi_tmf_timedout(unsigned long data)
struct iscsi_conn *conn = (struct iscsi_conn *)data;
struct iscsi_session *session = conn->session;
- spin_lock(&session->lock);
+ spin_lock(&session->frwd_lock);
if (conn->tmf_state == TMF_QUEUED) {
conn->tmf_state = TMF_TIMEDOUT;
ISCSI_DBG_EH(session, "tmf timedout\n");
/* unblock eh_abort() */
wake_up(&conn->ehwait);
}
- spin_unlock(&session->lock);
+ spin_unlock(&session->frwd_lock);
}
static int iscsi_exec_task_mgmt_fn(struct iscsi_conn *conn,
@@ -1791,10 +1815,10 @@ static int iscsi_exec_task_mgmt_fn(struct iscsi_conn *conn,
task = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)hdr,
NULL, 0);
if (!task) {
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
+ iscsi_conn_printk(KERN_ERR, conn, "Could not send TMF.\n");
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
- spin_lock_bh(&session->lock);
- ISCSI_DBG_EH(session, "tmf exec failure\n");
+ spin_lock_bh(&session->frwd_lock);
return -EPERM;
}
conn->tmfcmd_pdus_cnt++;
@@ -1804,7 +1828,7 @@ static int iscsi_exec_task_mgmt_fn(struct iscsi_conn *conn,
add_timer(&conn->tmf_timer);
ISCSI_DBG_EH(session, "tmf set timeout\n");
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
mutex_unlock(&session->eh_mutex);
/*
@@ -1823,7 +1847,7 @@ static int iscsi_exec_task_mgmt_fn(struct iscsi_conn *conn,
del_timer_sync(&conn->tmf_timer);
mutex_lock(&session->eh_mutex);
- spin_lock_bh(&session->lock);
+ spin_lock_bh(&session->frwd_lock);
/* if the session drops it will clean up the task */
if (age != session->age ||
session->state != ISCSI_STATE_LOGGED_IN)
@@ -1860,7 +1884,7 @@ static void fail_scsi_tasks(struct iscsi_conn *conn, unsigned lun,
* 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
+ * This grabs the session frwd_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
@@ -1869,9 +1893,9 @@ static void fail_scsi_tasks(struct iscsi_conn *conn, unsigned lun,
*/
void iscsi_suspend_queue(struct iscsi_conn *conn)
{
- spin_lock_bh(&conn->session->lock);
+ spin_lock_bh(&conn->session->frwd_lock);
set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
- spin_unlock_bh(&conn->session->lock);
+ spin_unlock_bh(&conn->session->frwd_lock);
}
EXPORT_SYMBOL_GPL(iscsi_suspend_queue);
@@ -1919,17 +1943,28 @@ static int iscsi_has_ping_timed_out(struct iscsi_conn *conn)
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_task *task = NULL, *running_task;
struct iscsi_cls_session *cls_session;
struct iscsi_session *session;
struct iscsi_conn *conn;
+ int i;
cls_session = starget_to_session(scsi_target(sc->device));
session = cls_session->dd_data;
ISCSI_DBG_EH(session, "scsi cmd %p timedout\n", sc);
- spin_lock(&session->lock);
+ spin_lock(&session->frwd_lock);
+ task = (struct iscsi_task *)sc->SCp.ptr;
+ if (!task) {
+ /*
+ * Raced with completion. Blk layer has taken ownership
+ * so let timeout code complete it now.
+ */
+ rc = BLK_EH_HANDLED;
+ goto done;
+ }
+
if (session->state != ISCSI_STATE_LOGGED_IN) {
/*
* We are probably in the middle of iscsi recovery so let
@@ -1946,9 +1981,6 @@ static enum blk_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *sc)
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
@@ -1956,10 +1988,10 @@ static enum blk_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *sc)
* 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)) {
+ if (time_after(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 "
+ "Last data xfer at %lu. Last timeout was at "
"%lu\n.", task->last_xfer, task->last_timeout);
task->have_checked_conn = false;
rc = BLK_EH_RESET_TIMER;
@@ -1977,6 +2009,43 @@ static enum blk_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *sc)
goto done;
}
+ for (i = 0; i < conn->session->cmds_max; i++) {
+ running_task = conn->session->cmds[i];
+ if (!running_task->sc || running_task == task ||
+ running_task->state != ISCSI_TASK_RUNNING)
+ continue;
+
+ /*
+ * Only check if cmds started before this one have made
+ * progress, or this could never fail
+ */
+ if (time_after(running_task->sc->jiffies_at_alloc,
+ task->sc->jiffies_at_alloc))
+ continue;
+
+ if (time_after(running_task->last_xfer, task->last_timeout)) {
+ /*
+ * This task has not made progress, but a task
+ * started before us has transferred data since
+ * we started/last-checked. We could be queueing
+ * too many tasks or the LU is bad.
+ *
+ * If the device is bad the cmds ahead of us on
+ * other devs will complete, and this loop will
+ * eventually fail starting the scsi eh.
+ */
+ ISCSI_DBG_EH(session, "Command has not made progress "
+ "but commands ahead of it have. "
+ "Asking scsi-ml for more time to "
+ "complete. Our last xfer vs running task "
+ "last xfer %lu/%lu. Last check %lu.\n",
+ task->last_xfer, running_task->last_xfer,
+ task->last_timeout);
+ rc = BLK_EH_RESET_TIMER;
+ goto done;
+ }
+ }
+
/* Assumes nop timeout is shorter than scsi cmd timeout */
if (task->have_checked_conn)
goto done;
@@ -1999,7 +2068,7 @@ static enum blk_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *sc)
done:
if (task)
task->last_timeout = jiffies;
- spin_unlock(&session->lock);
+ spin_unlock(&session->frwd_lock);
ISCSI_DBG_EH(session, "return %s\n", rc == BLK_EH_RESET_TIMER ?
"timer reset" : "nh");
return rc;
@@ -2011,7 +2080,7 @@ static void iscsi_check_transport_timeouts(unsigned long data)
struct iscsi_session *session = conn->session;
unsigned long recv_timeout, next_timeout = 0, last_recv;
- spin_lock(&session->lock);
+ spin_lock(&session->frwd_lock);
if (session->state != ISCSI_STATE_LOGGED_IN)
goto done;
@@ -2028,7 +2097,7 @@ static void iscsi_check_transport_timeouts(unsigned long data)
"last ping %lu, now %lu\n",
conn->ping_timeout, conn->recv_timeout,
last_recv, conn->last_ping, jiffies);
- spin_unlock(&session->lock);
+ spin_unlock(&session->frwd_lock);
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
return;
}
@@ -2044,7 +2113,7 @@ static void iscsi_check_transport_timeouts(unsigned long data)
ISCSI_DBG_CONN(conn, "Setting next tmo %lu\n", next_timeout);
mod_timer(&conn->transport_timer, next_timeout);
done:
- spin_unlock(&session->lock);
+ spin_unlock(&session->frwd_lock);
}
static void iscsi_prep_abort_task_pdu(struct iscsi_task *task,
@@ -2054,7 +2123,7 @@ static void iscsi_prep_abort_task_pdu(struct iscsi_task *task,
hdr->opcode = ISCSI_OP_SCSI_TMFUNC | ISCSI_OP_IMMEDIATE;
hdr->flags = ISCSI_TM_FUNC_ABORT_TASK & ISCSI_FLAG_TM_FUNC_MASK;
hdr->flags |= ISCSI_FLAG_CMD_FINAL;
- memcpy(hdr->lun, task->lun, sizeof(hdr->lun));
+ hdr->lun = task->lun;
hdr->rtt = task->hdr_itt;
hdr->refcmdsn = task->cmdsn;
}
@@ -2074,7 +2143,7 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
ISCSI_DBG_EH(session, "aborting sc %p\n", sc);
mutex_lock(&session->eh_mutex);
- spin_lock_bh(&session->lock);
+ spin_lock_bh(&session->frwd_lock);
/*
* if session was ISCSI_STATE_IN_RECOVERY then we may not have
* got the command.
@@ -2082,7 +2151,7 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
if (!sc->SCp.ptr) {
ISCSI_DBG_EH(session, "sc never reached iscsi layer or "
"it completed.\n");
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
mutex_unlock(&session->eh_mutex);
return SUCCESS;
}
@@ -2093,7 +2162,7 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
*/
if (!session->leadconn || session->state != ISCSI_STATE_LOGGED_IN ||
sc->SCp.phase != session->age) {
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
mutex_unlock(&session->eh_mutex);
ISCSI_DBG_EH(session, "failing abort due to dropped "
"session.\n");
@@ -2134,7 +2203,7 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
switch (conn->tmf_state) {
case TMF_SUCCESS:
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
/*
* stop tx side incase the target had sent a abort rsp but
* the initiator was still writing out data.
@@ -2145,16 +2214,16 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
* good and have never sent us a successful tmf response
* then sent more data for the cmd.
*/
- spin_lock_bh(&session->lock);
+ spin_lock_bh(&session->frwd_lock);
fail_scsi_task(task, DID_ABORT);
conn->tmf_state = TMF_INITIAL;
memset(hdr, 0, sizeof(*hdr));
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
iscsi_start_tx(conn);
goto success_unlocked;
case TMF_TIMEDOUT:
- spin_unlock_bh(&session->lock);
- iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
+ spin_unlock_bh(&session->frwd_lock);
+ iscsi_conn_failure(conn, ISCSI_ERR_SCSI_EH_SESSION_RST);
goto failed_unlocked;
case TMF_NOT_FOUND:
if (!sc->SCp.ptr) {
@@ -2172,7 +2241,7 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
}
success:
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
success_unlocked:
ISCSI_DBG_EH(session, "abort success [sc %p itt 0x%x]\n",
sc, task->itt);
@@ -2180,7 +2249,7 @@ success_unlocked:
return SUCCESS;
failed:
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
failed_unlocked:
ISCSI_DBG_EH(session, "abort failed [sc %p itt 0x%x]\n", sc,
task ? task->itt : 0);
@@ -2195,7 +2264,7 @@ static void iscsi_prep_lun_reset_pdu(struct scsi_cmnd *sc, struct iscsi_tm *hdr)
hdr->opcode = ISCSI_OP_SCSI_TMFUNC | ISCSI_OP_IMMEDIATE;
hdr->flags = ISCSI_TM_FUNC_LOGICAL_UNIT_RESET & ISCSI_FLAG_TM_FUNC_MASK;
hdr->flags |= ISCSI_FLAG_CMD_FINAL;
- int_to_scsilun(sc->device->lun, (struct scsi_lun *)hdr->lun);
+ int_to_scsilun(sc->device->lun, &hdr->lun);
hdr->rtt = RESERVED_ITT;
}
@@ -2213,7 +2282,7 @@ int iscsi_eh_device_reset(struct scsi_cmnd *sc)
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);
+ spin_lock_bh(&session->frwd_lock);
/*
* Just check if we are not logged in. We cannot check for
* the phase because the reset could come from a ioctl.
@@ -2240,8 +2309,8 @@ int iscsi_eh_device_reset(struct scsi_cmnd *sc)
case TMF_SUCCESS:
break;
case TMF_TIMEDOUT:
- spin_unlock_bh(&session->lock);
- iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
+ spin_unlock_bh(&session->frwd_lock);
+ iscsi_conn_failure(conn, ISCSI_ERR_SCSI_EH_SESSION_RST);
goto done;
default:
conn->tmf_state = TMF_INITIAL;
@@ -2249,21 +2318,21 @@ int iscsi_eh_device_reset(struct scsi_cmnd *sc)
}
rc = SUCCESS;
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
iscsi_suspend_tx(conn);
- spin_lock_bh(&session->lock);
+ spin_lock_bh(&session->frwd_lock);
memset(hdr, 0, sizeof(*hdr));
fail_scsi_tasks(conn, sc->device->lun, DID_ERROR);
conn->tmf_state = TMF_INITIAL;
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
iscsi_start_tx(conn);
goto done;
unlock:
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
done:
ISCSI_DBG_EH(session, "dev reset result = %s\n",
rc == SUCCESS ? "SUCCESS" : "FAILED");
@@ -2276,13 +2345,13 @@ void iscsi_session_recovery_timedout(struct iscsi_cls_session *cls_session)
{
struct iscsi_session *session = cls_session->dd_data;
- spin_lock_bh(&session->lock);
+ spin_lock_bh(&session->frwd_lock);
if (session->state != ISCSI_STATE_LOGGED_IN) {
session->state = ISCSI_STATE_RECOVERY_FAILED;
if (session->leadconn)
wake_up(&session->leadconn->ehwait);
}
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
}
EXPORT_SYMBOL_GPL(iscsi_session_recovery_timedout);
@@ -2293,7 +2362,7 @@ EXPORT_SYMBOL_GPL(iscsi_session_recovery_timedout);
* This function will wait for a relogin, session termination from
* userspace, or a recovery/replacement timeout.
*/
-static int iscsi_eh_session_reset(struct scsi_cmnd *sc)
+int iscsi_eh_session_reset(struct scsi_cmnd *sc)
{
struct iscsi_cls_session *cls_session;
struct iscsi_session *session;
@@ -2304,25 +2373,25 @@ static int iscsi_eh_session_reset(struct scsi_cmnd *sc)
conn = session->leadconn;
mutex_lock(&session->eh_mutex);
- spin_lock_bh(&session->lock);
+ spin_lock_bh(&session->frwd_lock);
if (session->state == ISCSI_STATE_TERMINATE) {
failed:
ISCSI_DBG_EH(session,
"failing session reset: Could not log back into "
"%s, %s [age %d]\n", session->targetname,
conn->persistent_address, session->age);
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
mutex_unlock(&session->eh_mutex);
return FAILED;
}
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
mutex_unlock(&session->eh_mutex);
/*
* we drop the lock here but the leadconn cannot be destoyed while
* we are in the scsi eh
*/
- iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
+ iscsi_conn_failure(conn, ISCSI_ERR_SCSI_EH_SESSION_RST);
ISCSI_DBG_EH(session, "wait for relogin\n");
wait_event_interruptible(conn->ehwait,
@@ -2333,17 +2402,18 @@ failed:
flush_signals(current);
mutex_lock(&session->eh_mutex);
- spin_lock_bh(&session->lock);
+ spin_lock_bh(&session->frwd_lock);
if (session->state == ISCSI_STATE_LOGGED_IN) {
ISCSI_DBG_EH(session,
"session reset succeeded for %s,%s\n",
session->targetname, conn->persistent_address);
} else
goto failed;
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
mutex_unlock(&session->eh_mutex);
return SUCCESS;
}
+EXPORT_SYMBOL_GPL(iscsi_eh_session_reset);
static void iscsi_prep_tgt_reset_pdu(struct scsi_cmnd *sc, struct iscsi_tm *hdr)
{
@@ -2358,8 +2428,7 @@ static void iscsi_prep_tgt_reset_pdu(struct scsi_cmnd *sc, struct iscsi_tm *hdr)
* iscsi_eh_target_reset - reset target
* @sc: scsi command
*
- * This will attempt to send a warm target reset. If that fails
- * then we will drop the session and attempt ERL0 recovery.
+ * This will attempt to send a warm target reset.
*/
int iscsi_eh_target_reset(struct scsi_cmnd *sc)
{
@@ -2376,7 +2445,7 @@ int iscsi_eh_target_reset(struct scsi_cmnd *sc)
session->targetname);
mutex_lock(&session->eh_mutex);
- spin_lock_bh(&session->lock);
+ spin_lock_bh(&session->frwd_lock);
/*
* Just check if we are not logged in. We cannot check for
* the phase because the reset could come from a ioctl.
@@ -2403,8 +2472,8 @@ int iscsi_eh_target_reset(struct scsi_cmnd *sc)
case TMF_SUCCESS:
break;
case TMF_TIMEDOUT:
- spin_unlock_bh(&session->lock);
- iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
+ spin_unlock_bh(&session->frwd_lock);
+ iscsi_conn_failure(conn, ISCSI_ERR_SCSI_EH_SESSION_RST);
goto done;
default:
conn->tmf_state = TMF_INITIAL;
@@ -2412,31 +2481,46 @@ int iscsi_eh_target_reset(struct scsi_cmnd *sc)
}
rc = SUCCESS;
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
iscsi_suspend_tx(conn);
- spin_lock_bh(&session->lock);
+ spin_lock_bh(&session->frwd_lock);
memset(hdr, 0, sizeof(*hdr));
fail_scsi_tasks(conn, -1, DID_ERROR);
conn->tmf_state = TMF_INITIAL;
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
iscsi_start_tx(conn);
goto done;
unlock:
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
done:
ISCSI_DBG_EH(session, "tgt %s reset result = %s\n", session->targetname,
rc == SUCCESS ? "SUCCESS" : "FAILED");
mutex_unlock(&session->eh_mutex);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(iscsi_eh_target_reset);
+
+/**
+ * iscsi_eh_recover_target - reset target and possibly the session
+ * @sc: scsi command
+ *
+ * This will attempt to send a warm target reset. If that fails,
+ * we will escalate to ERL0 session recovery.
+ */
+int iscsi_eh_recover_target(struct scsi_cmnd *sc)
+{
+ int rc;
+ rc = iscsi_eh_target_reset(sc);
if (rc == FAILED)
rc = iscsi_eh_session_reset(sc);
return rc;
}
-EXPORT_SYMBOL_GPL(iscsi_eh_target_reset);
+EXPORT_SYMBOL_GPL(iscsi_eh_recover_target);
/*
* Pre-allocate a pool of @max items of @item_size. By default, the pool
@@ -2709,8 +2793,10 @@ iscsi_session_setup(struct iscsi_transport *iscsit, struct Scsi_Host *shost,
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);
+ spin_lock_init(&session->frwd_lock);
+ spin_lock_init(&session->back_lock);
/* initialize SCSI PDU commands pool */
if (iscsi_pool_init(&session->cmdpool, session->cmds_max,
@@ -2769,8 +2855,14 @@ void iscsi_session_teardown(struct iscsi_cls_session *cls_session)
kfree(session->username);
kfree(session->username_in);
kfree(session->targetname);
+ kfree(session->targetalias);
kfree(session->initiatorname);
+ kfree(session->boot_root);
+ kfree(session->boot_nic);
+ kfree(session->boot_target);
kfree(session->ifacename);
+ kfree(session->portal_type);
+ kfree(session->discovery_parent_type);
iscsi_destroy_session(cls_session);
iscsi_host_dec_session_cnt(shost);
@@ -2818,14 +2910,14 @@ iscsi_conn_setup(struct iscsi_cls_session *cls_session, int dd_size,
INIT_WORK(&conn->xmitwork, iscsi_xmitworker);
/* allocate login_task used for the login/text sequences */
- spin_lock_bh(&session->lock);
+ spin_lock_bh(&session->frwd_lock);
if (!kfifo_out(&session->cmdpool.queue,
(void*)&conn->login_task,
sizeof(void*))) {
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
goto login_task_alloc_fail;
}
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
data = (char *) __get_free_pages(GFP_KERNEL,
get_order(ISCSI_DEF_MAX_RECV_SEG_LEN));
@@ -2862,7 +2954,7 @@ void iscsi_conn_teardown(struct iscsi_cls_conn *cls_conn)
del_timer_sync(&conn->transport_timer);
- spin_lock_bh(&session->lock);
+ spin_lock_bh(&session->frwd_lock);
conn->c_stage = ISCSI_CONN_CLEANUP_WAIT;
if (session->leadconn == conn) {
/*
@@ -2871,7 +2963,7 @@ void iscsi_conn_teardown(struct iscsi_cls_conn *cls_conn)
session->state = ISCSI_STATE_TERMINATE;
wake_up(&conn->ehwait);
}
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
/*
* Block until all in-progress commands for this connection
@@ -2898,15 +2990,19 @@ void iscsi_conn_teardown(struct iscsi_cls_conn *cls_conn)
/* flush queued up work because we free the connection below */
iscsi_suspend_tx(conn);
- spin_lock_bh(&session->lock);
+ spin_lock_bh(&session->frwd_lock);
free_pages((unsigned long) conn->data,
get_order(ISCSI_DEF_MAX_RECV_SEG_LEN));
kfree(conn->persistent_address);
+ kfree(conn->local_ipaddr);
+ /* regular RX path uses back_lock */
+ spin_lock_bh(&session->back_lock);
kfifo_in(&session->cmdpool.queue, (void*)&conn->login_task,
sizeof(void*));
+ spin_unlock_bh(&session->back_lock);
if (session->leadconn == conn)
session->leadconn = NULL;
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
iscsi_destroy_conn(cls_conn);
}
@@ -2943,7 +3039,7 @@ int iscsi_conn_start(struct iscsi_cls_conn *cls_conn)
conn->ping_timeout = 5;
}
- spin_lock_bh(&session->lock);
+ spin_lock_bh(&session->frwd_lock);
conn->c_stage = ISCSI_CONN_STARTED;
session->state = ISCSI_STATE_LOGGED_IN;
session->queued_cmdsn = session->cmdsn;
@@ -2972,7 +3068,7 @@ int iscsi_conn_start(struct iscsi_cls_conn *cls_conn)
default:
break;
}
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
iscsi_unblock_session(session->cls_session);
wake_up(&conn->ehwait);
@@ -3011,9 +3107,9 @@ static void iscsi_start_session_recovery(struct iscsi_session *session,
int old_stop_stage;
mutex_lock(&session->eh_mutex);
- spin_lock_bh(&session->lock);
+ spin_lock_bh(&session->frwd_lock);
if (conn->stop_stage == STOP_CONN_TERM) {
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
mutex_unlock(&session->eh_mutex);
return;
}
@@ -3027,16 +3123,17 @@ static void iscsi_start_session_recovery(struct iscsi_session *session,
session->state = ISCSI_STATE_TERMINATE;
else if (conn->stop_stage != STOP_CONN_RECOVER)
session->state = ISCSI_STATE_IN_RECOVERY;
- spin_unlock_bh(&session->lock);
+
+ old_stop_stage = conn->stop_stage;
+ conn->stop_stage = flag;
+ spin_unlock_bh(&session->frwd_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;
+ spin_lock_bh(&session->frwd_lock);
conn->c_stage = ISCSI_CONN_STOPPED;
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
/*
* for connection level recovery we should not calculate
@@ -3057,11 +3154,11 @@ static void iscsi_start_session_recovery(struct iscsi_session *session,
/*
* flush queues.
*/
- spin_lock_bh(&session->lock);
+ spin_lock_bh(&session->frwd_lock);
fail_scsi_tasks(conn, -1, DID_TRANSPORT_DISRUPTED);
fail_mgmt_tasks(session, conn);
memset(&conn->tmhdr, 0, sizeof(conn->tmhdr));
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
mutex_unlock(&session->eh_mutex);
}
@@ -3088,10 +3185,10 @@ int iscsi_conn_bind(struct iscsi_cls_session *cls_session,
struct iscsi_session *session = cls_session->dd_data;
struct iscsi_conn *conn = cls_conn->dd_data;
- spin_lock_bh(&session->lock);
+ spin_lock_bh(&session->frwd_lock);
if (is_leading)
session->leadconn = conn;
- spin_unlock_bh(&session->lock);
+ spin_unlock_bh(&session->frwd_lock);
/*
* Unblock xmitworker(), Login Phase will pass through.
@@ -3102,7 +3199,7 @@ int iscsi_conn_bind(struct iscsi_cls_session *cls_session,
}
EXPORT_SYMBOL_GPL(iscsi_conn_bind);
-static int iscsi_switch_str_param(char **param, char *new_val_buf)
+int iscsi_switch_str_param(char **param, char *new_val_buf)
{
char *new_val;
@@ -3119,13 +3216,14 @@ static int iscsi_switch_str_param(char **param, char *new_val_buf)
*param = new_val;
return 0;
}
+EXPORT_SYMBOL_GPL(iscsi_switch_str_param);
int iscsi_set_param(struct iscsi_cls_conn *cls_conn,
enum iscsi_param param, char *buf, int buflen)
{
struct iscsi_conn *conn = cls_conn->dd_data;
struct iscsi_session *session = conn->session;
- uint32_t value;
+ int val;
switch(param) {
case ISCSI_PARAM_FAST_ABORT:
@@ -3162,7 +3260,7 @@ int iscsi_set_param(struct iscsi_cls_conn *cls_conn,
sscanf(buf, "%d", &session->initial_r2t_en);
break;
case ISCSI_PARAM_MAX_R2T:
- sscanf(buf, "%d", &session->max_r2t);
+ sscanf(buf, "%hu", &session->max_r2t);
break;
case ISCSI_PARAM_IMM_DATA_EN:
sscanf(buf, "%d", &session->imm_data_en);
@@ -3182,14 +3280,6 @@ int iscsi_set_param(struct iscsi_cls_conn *cls_conn,
case ISCSI_PARAM_ERL:
sscanf(buf, "%d", &session->erl);
break;
- case ISCSI_PARAM_IFMARKER_EN:
- sscanf(buf, "%d", &value);
- BUG_ON(value);
- break;
- case ISCSI_PARAM_OFMARKER_EN:
- sscanf(buf, "%d", &value);
- BUG_ON(value);
- break;
case ISCSI_PARAM_EXP_STATSN:
sscanf(buf, "%u", &conn->exp_statsn);
break;
@@ -3203,6 +3293,8 @@ int iscsi_set_param(struct iscsi_cls_conn *cls_conn,
return iscsi_switch_str_param(&session->password_in, buf);
case ISCSI_PARAM_TARGET_NAME:
return iscsi_switch_str_param(&session->targetname, buf);
+ case ISCSI_PARAM_TARGET_ALIAS:
+ return iscsi_switch_str_param(&session->targetalias, buf);
case ISCSI_PARAM_TPGT:
sscanf(buf, "%d", &session->tpgt);
break;
@@ -3215,6 +3307,23 @@ int iscsi_set_param(struct iscsi_cls_conn *cls_conn,
return iscsi_switch_str_param(&session->ifacename, buf);
case ISCSI_PARAM_INITIATOR_NAME:
return iscsi_switch_str_param(&session->initiatorname, buf);
+ case ISCSI_PARAM_BOOT_ROOT:
+ return iscsi_switch_str_param(&session->boot_root, buf);
+ case ISCSI_PARAM_BOOT_NIC:
+ return iscsi_switch_str_param(&session->boot_nic, buf);
+ case ISCSI_PARAM_BOOT_TARGET:
+ return iscsi_switch_str_param(&session->boot_target, buf);
+ case ISCSI_PARAM_PORTAL_TYPE:
+ return iscsi_switch_str_param(&session->portal_type, buf);
+ case ISCSI_PARAM_DISCOVERY_PARENT_TYPE:
+ return iscsi_switch_str_param(&session->discovery_parent_type,
+ buf);
+ case ISCSI_PARAM_DISCOVERY_SESS:
+ sscanf(buf, "%d", &val);
+ session->discovery_sess = !!val;
+ break;
+ case ISCSI_PARAM_LOCAL_IPADDR:
+ return iscsi_switch_str_param(&conn->local_ipaddr, buf);
default:
return -ENOSYS;
}
@@ -3263,12 +3372,18 @@ int iscsi_session_get_param(struct iscsi_cls_session *cls_session,
case ISCSI_PARAM_DATASEQ_INORDER_EN:
len = sprintf(buf, "%d\n", session->dataseq_inorder_en);
break;
+ case ISCSI_PARAM_DEF_TASKMGMT_TMO:
+ len = sprintf(buf, "%d\n", session->def_taskmgmt_tmo);
+ break;
case ISCSI_PARAM_ERL:
len = sprintf(buf, "%d\n", session->erl);
break;
case ISCSI_PARAM_TARGET_NAME:
len = sprintf(buf, "%s\n", session->targetname);
break;
+ case ISCSI_PARAM_TARGET_ALIAS:
+ len = sprintf(buf, "%s\n", session->targetalias);
+ break;
case ISCSI_PARAM_TPGT:
len = sprintf(buf, "%d\n", session->tpgt);
break;
@@ -3290,6 +3405,61 @@ int iscsi_session_get_param(struct iscsi_cls_session *cls_session,
case ISCSI_PARAM_INITIATOR_NAME:
len = sprintf(buf, "%s\n", session->initiatorname);
break;
+ case ISCSI_PARAM_BOOT_ROOT:
+ len = sprintf(buf, "%s\n", session->boot_root);
+ break;
+ case ISCSI_PARAM_BOOT_NIC:
+ len = sprintf(buf, "%s\n", session->boot_nic);
+ break;
+ case ISCSI_PARAM_BOOT_TARGET:
+ len = sprintf(buf, "%s\n", session->boot_target);
+ break;
+ case ISCSI_PARAM_AUTO_SND_TGT_DISABLE:
+ len = sprintf(buf, "%u\n", session->auto_snd_tgt_disable);
+ break;
+ case ISCSI_PARAM_DISCOVERY_SESS:
+ len = sprintf(buf, "%u\n", session->discovery_sess);
+ break;
+ case ISCSI_PARAM_PORTAL_TYPE:
+ len = sprintf(buf, "%s\n", session->portal_type);
+ break;
+ case ISCSI_PARAM_CHAP_AUTH_EN:
+ len = sprintf(buf, "%u\n", session->chap_auth_en);
+ break;
+ case ISCSI_PARAM_DISCOVERY_LOGOUT_EN:
+ len = sprintf(buf, "%u\n", session->discovery_logout_en);
+ break;
+ case ISCSI_PARAM_BIDI_CHAP_EN:
+ len = sprintf(buf, "%u\n", session->bidi_chap_en);
+ break;
+ case ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL:
+ len = sprintf(buf, "%u\n", session->discovery_auth_optional);
+ break;
+ case ISCSI_PARAM_DEF_TIME2WAIT:
+ len = sprintf(buf, "%d\n", session->time2wait);
+ break;
+ case ISCSI_PARAM_DEF_TIME2RETAIN:
+ len = sprintf(buf, "%d\n", session->time2retain);
+ break;
+ case ISCSI_PARAM_TSID:
+ len = sprintf(buf, "%u\n", session->tsid);
+ break;
+ case ISCSI_PARAM_ISID:
+ len = sprintf(buf, "%02x%02x%02x%02x%02x%02x\n",
+ session->isid[0], session->isid[1],
+ session->isid[2], session->isid[3],
+ session->isid[4], session->isid[5]);
+ break;
+ case ISCSI_PARAM_DISCOVERY_PARENT_IDX:
+ len = sprintf(buf, "%u\n", session->discovery_parent_idx);
+ break;
+ case ISCSI_PARAM_DISCOVERY_PARENT_TYPE:
+ if (session->discovery_parent_type)
+ len = sprintf(buf, "%s\n",
+ session->discovery_parent_type);
+ else
+ len = sprintf(buf, "\n");
+ break;
default:
return -ENOSYS;
}
@@ -3298,6 +3468,47 @@ int iscsi_session_get_param(struct iscsi_cls_session *cls_session,
}
EXPORT_SYMBOL_GPL(iscsi_session_get_param);
+int iscsi_conn_get_addr_param(struct sockaddr_storage *addr,
+ enum iscsi_param param, char *buf)
+{
+ struct sockaddr_in6 *sin6 = NULL;
+ struct sockaddr_in *sin = NULL;
+ int len;
+
+ switch (addr->ss_family) {
+ case AF_INET:
+ sin = (struct sockaddr_in *)addr;
+ break;
+ case AF_INET6:
+ sin6 = (struct sockaddr_in6 *)addr;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (param) {
+ case ISCSI_PARAM_CONN_ADDRESS:
+ case ISCSI_HOST_PARAM_IPADDRESS:
+ if (sin)
+ len = sprintf(buf, "%pI4\n", &sin->sin_addr.s_addr);
+ else
+ len = sprintf(buf, "%pI6\n", &sin6->sin6_addr);
+ break;
+ case ISCSI_PARAM_CONN_PORT:
+ if (sin)
+ len = sprintf(buf, "%hu\n", be16_to_cpu(sin->sin_port));
+ else
+ len = sprintf(buf, "%hu\n",
+ be16_to_cpu(sin6->sin6_port));
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return len;
+}
+EXPORT_SYMBOL_GPL(iscsi_conn_get_addr_param);
+
int iscsi_conn_get_param(struct iscsi_cls_conn *cls_conn,
enum iscsi_param param, char *buf)
{
@@ -3338,6 +3549,57 @@ int iscsi_conn_get_param(struct iscsi_cls_conn *cls_conn,
case ISCSI_PARAM_PERSISTENT_ADDRESS:
len = sprintf(buf, "%s\n", conn->persistent_address);
break;
+ case ISCSI_PARAM_STATSN:
+ len = sprintf(buf, "%u\n", conn->statsn);
+ break;
+ case ISCSI_PARAM_MAX_SEGMENT_SIZE:
+ len = sprintf(buf, "%u\n", conn->max_segment_size);
+ break;
+ case ISCSI_PARAM_KEEPALIVE_TMO:
+ len = sprintf(buf, "%u\n", conn->keepalive_tmo);
+ break;
+ case ISCSI_PARAM_LOCAL_PORT:
+ len = sprintf(buf, "%u\n", conn->local_port);
+ break;
+ case ISCSI_PARAM_TCP_TIMESTAMP_STAT:
+ len = sprintf(buf, "%u\n", conn->tcp_timestamp_stat);
+ break;
+ case ISCSI_PARAM_TCP_NAGLE_DISABLE:
+ len = sprintf(buf, "%u\n", conn->tcp_nagle_disable);
+ break;
+ case ISCSI_PARAM_TCP_WSF_DISABLE:
+ len = sprintf(buf, "%u\n", conn->tcp_wsf_disable);
+ break;
+ case ISCSI_PARAM_TCP_TIMER_SCALE:
+ len = sprintf(buf, "%u\n", conn->tcp_timer_scale);
+ break;
+ case ISCSI_PARAM_TCP_TIMESTAMP_EN:
+ len = sprintf(buf, "%u\n", conn->tcp_timestamp_en);
+ break;
+ case ISCSI_PARAM_IP_FRAGMENT_DISABLE:
+ len = sprintf(buf, "%u\n", conn->fragment_disable);
+ break;
+ case ISCSI_PARAM_IPV4_TOS:
+ len = sprintf(buf, "%u\n", conn->ipv4_tos);
+ break;
+ case ISCSI_PARAM_IPV6_TC:
+ len = sprintf(buf, "%u\n", conn->ipv6_traffic_class);
+ break;
+ case ISCSI_PARAM_IPV6_FLOW_LABEL:
+ len = sprintf(buf, "%u\n", conn->ipv6_flow_label);
+ break;
+ case ISCSI_PARAM_IS_FW_ASSIGNED_IPV6:
+ len = sprintf(buf, "%u\n", conn->is_fw_assigned_ipv6);
+ break;
+ case ISCSI_PARAM_TCP_XMIT_WSF:
+ len = sprintf(buf, "%u\n", conn->tcp_xmit_wsf);
+ break;
+ case ISCSI_PARAM_TCP_RECV_WSF:
+ len = sprintf(buf, "%u\n", conn->tcp_recv_wsf);
+ break;
+ case ISCSI_PARAM_LOCAL_IPADDR:
+ len = sprintf(buf, "%s\n", conn->local_ipaddr);
+ break;
default:
return -ENOSYS;
}
@@ -3362,9 +3624,6 @@ int iscsi_host_get_param(struct Scsi_Host *shost, enum iscsi_host_param param,
case ISCSI_HOST_PARAM_INITIATOR_NAME:
len = sprintf(buf, "%s\n", ihost->initiatorname);
break;
- case ISCSI_HOST_PARAM_IPADDRESS:
- len = sprintf(buf, "%s\n", ihost->local_address);
- break;
default:
return -ENOSYS;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 06:50:48 +0000