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authorNicholas Bellinger <nab@linux-iscsi.org>2018-10-10 06:23:09 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2018-10-16 07:11:13 +0300
commit25ab0bc334b43bbbe4eabc255006ce42a9424da2 (patch)
tree4bbdd7dcdc907005ec289badc39cf4d0801c046a /include/linux/wait.h
parent0b4aafc332e49e143d3ee1c2460367ba0f07da1a (diff)
downloadlinux-25ab0bc334b43bbbe4eabc255006ce42a9424da2.tar.xz
scsi: sched/wait: Add wait_event_lock_irq_timeout for TASK_UNINTERRUPTIBLE usage
Short of reverting commit 00d909a10710 ("scsi: target: Make the session shutdown code also wait for commands that are being aborted") for v4.19, target-core needs a wait_event_t macro can be executed using TASK_UNINTERRUPTIBLE to function correctly with existing fabric drivers that expect to run with signals pending during session shutdown and active se_cmd I/O quiesce. The most notable is iscsi-target/iser-target, while ibmvscsi_tgt invokes session shutdown logic from userspace via configfs attribute that could also potentially have signals pending. So go ahead and introduce wait_event_lock_irq_timeout() to achieve this, and update + rename __wait_event_lock_irq_timeout() to make it accept 'state' as a parameter. Fixes: 00d909a10710 ("scsi: target: Make the session shutdown code also wait for commands that are being aborted") Cc: <stable@vger.kernel.org> # v4.19+ Cc: Bart Van Assche <bvanassche@acm.org> Cc: Mike Christie <mchristi@redhat.com> Cc: Hannes Reinecke <hare@suse.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Sagi Grimberg <sagi@grimberg.me> Cc: Bryant G. Ly <bryantly@linux.vnet.ibm.com> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Reviewed-by: Bryant G. Ly <bly@catalogicsoftware.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'include/linux/wait.h')
-rw-r--r--include/linux/wait.h20
1 files changed, 15 insertions, 5 deletions
diff --git a/include/linux/wait.h b/include/linux/wait.h
index d9f131ecf708..ed7c122cb31f 100644
--- a/include/linux/wait.h
+++ b/include/linux/wait.h
@@ -1052,10 +1052,9 @@ do { \
__ret; \
})
-#define __wait_event_interruptible_lock_irq_timeout(wq_head, condition, \
- lock, timeout) \
+#define __wait_event_lock_irq_timeout(wq_head, condition, lock, timeout, state) \
___wait_event(wq_head, ___wait_cond_timeout(condition), \
- TASK_INTERRUPTIBLE, 0, timeout, \
+ state, 0, timeout, \
spin_unlock_irq(&lock); \
__ret = schedule_timeout(__ret); \
spin_lock_irq(&lock));
@@ -1089,8 +1088,19 @@ do { \
({ \
long __ret = timeout; \
if (!___wait_cond_timeout(condition)) \
- __ret = __wait_event_interruptible_lock_irq_timeout( \
- wq_head, condition, lock, timeout); \
+ __ret = __wait_event_lock_irq_timeout( \
+ wq_head, condition, lock, timeout, \
+ TASK_INTERRUPTIBLE); \
+ __ret; \
+})
+
+#define wait_event_lock_irq_timeout(wq_head, condition, lock, timeout) \
+({ \
+ long __ret = timeout; \
+ if (!___wait_cond_timeout(condition)) \
+ __ret = __wait_event_lock_irq_timeout( \
+ wq_head, condition, lock, timeout, \
+ TASK_UNINTERRUPTIBLE); \
__ret; \
})