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afs: Handle lock rpc ops failing on a file that got deleted

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Holding a file lock on an AFS file does not prevent it from being deleted
on the server, so we need to handle an error resulting from that when we
try setting, extending or releasing a lock.

Fix this by adding a "deleted" lock state and cancelling the lock extension
process for that file and aborting all waiters for the lock.

Fixes: 0fafdc9f88 ("afs: Fix file locking")
Reported-by: Jonathan Billings <jsbillin@umich.edu>
Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells
2019-04-25 14:26:51 +01:00
parent 445b10289f
commit cdfb26b40d
3 changed files with 66 additions and 4 deletions
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7
include/trace/events/afs.h
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@@ -156,9 +156,11 @@ enum afs_flock_event {
afs_flock_acquired,
afs_flock_callback_break,
afs_flock_defer_unlock,
afs_flock_extend_fail,
afs_flock_fail_other,
afs_flock_fail_perm,
afs_flock_no_lockers,
afs_flock_release_fail,
afs_flock_timestamp,
afs_flock_try_to_lock,
afs_flock_vfs_lock,
@@ -323,15 +325,18 @@ enum afs_flock_operation {
EM(AFS_VNODE_LOCK_GRANTED, "GRANTED") \
EM(AFS_VNODE_LOCK_EXTENDING, "EXTENDING") \
EM(AFS_VNODE_LOCK_NEED_UNLOCK, "NEED_UNLOCK") \
E_(AFS_VNODE_LOCK_UNLOCKING, "UNLOCKING") \
EM(AFS_VNODE_LOCK_UNLOCKING, "UNLOCKING") \
E_(AFS_VNODE_LOCK_DELETED, "DELETED")
#define afs_flock_events \
EM(afs_flock_acquired, "Acquired") \
EM(afs_flock_callback_break, "Callback") \
EM(afs_flock_defer_unlock, "D-Unlock") \
EM(afs_flock_extend_fail, "Ext_Fail") \
EM(afs_flock_fail_other, "ErrOther") \
EM(afs_flock_fail_perm, "ErrPerm ") \
EM(afs_flock_no_lockers, "NoLocker") \
EM(afs_flock_release_fail, "Rel_Fail") \
EM(afs_flock_timestamp, "Timestmp") \
EM(afs_flock_try_to_lock, "TryToLck") \
EM(afs_flock_vfs_lock, "VFSLock ") \