From: Erez Zilber <erezzi.list@xxxxxxxxx>
Allow the user to control the debug logs in libiscsi. We will now
have a module param for connection, session & error handling.
[Mike Christie - Fixed up to compile on current code and added
missing ISCSI_DBG_EH conversions]
Signed-off-by: Erez Zilber <erezzi.list@xxxxxxxxx>
Signed-off-by: Mike Christie <michaelc@xxxxxxxxxxx>
---
drivers/scsi/libiscsi.c | 109 ++++++++++++++++++++++++++++-------------------
1 files changed, 65 insertions(+), 44 deletions(-)
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index b55b799..716cc34 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -38,15 +38,30 @@
#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); \
@@ -54,7 +69,15 @@ MODULE_PARM_DESC(debug_libiscsi, "Turn on debugging for libiscsi module. "
#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); \
@@ -1561,10 +1584,10 @@ int iscsi_eh_target_reset(struct scsi_cmnd *sc)
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;
@@ -1578,7 +1601,7 @@ 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 ||
@@ -1588,10 +1611,10 @@ failed:
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);
@@ -1607,7 +1630,7 @@ static void iscsi_tmf_timedout(unsigned long data)
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);
}
@@ -1627,7 +1650,7 @@ static int iscsi_exec_task_mgmt_fn(struct iscsi_conn *conn,
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++;
@@ -1635,7 +1658,7 @@ static int iscsi_exec_task_mgmt_fn(struct iscsi_conn *conn,
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);
@@ -1733,7 +1756,7 @@ static enum blk_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *sc)
cls_session = starget_to_session(scsi_target(sc->device));
session = cls_session->dd_data;
- ISCSI_DBG_SESSION(session, "scsi cmd %p timedout\n", sc);
+ ISCSI_DBG_EH(session, "scsi cmd %p timedout\n", sc);
spin_lock(&session->lock);
if (session->state != ISCSI_STATE_LOGGED_IN) {
@@ -1763,10 +1786,10 @@ static enum blk_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *sc)
* nop as a ping.
*/
if (time_after_eq(task->last_xfer, task->last_timeout)) {
- ISCSI_DBG_CONN(conn, "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);
+ 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;
@@ -1806,8 +1829,8 @@ 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;
}
@@ -1877,7 +1900,7 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
cls_session = starget_to_session(scsi_target(sc->device));
session = cls_session->dd_data;
- ISCSI_DBG_SESSION(session, "aborting sc %p\n", sc);
+ ISCSI_DBG_EH(session, "aborting sc %p\n", sc);
mutex_lock(&session->eh_mutex);
spin_lock_bh(&session->lock);
@@ -1886,8 +1909,8 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
* 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;
@@ -1901,7 +1924,7 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
sc->SCp.phase != session->age) {
spin_unlock_bh(&session->lock);
mutex_unlock(&session->eh_mutex);
- ISCSI_DBG_SESSION(session, "failing abort due to dropped "
+ ISCSI_DBG_EH(session, "failing abort due to dropped "
"session.\n");
return FAILED;
}
@@ -1911,13 +1934,12 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
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;
}
@@ -1966,8 +1988,8 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
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 */
@@ -1979,16 +2001,16 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
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;
}
@@ -2015,8 +2037,7 @@ int iscsi_eh_device_reset(struct scsi_cmnd *sc)
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);
@@ -2070,8 +2091,8 @@ int iscsi_eh_device_reset(struct scsi_cmnd *sc)
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;
}
--
1.6.2.2
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