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author | jiangyiwen <jiangyiwen@huawei.com> | 2014-06-23 20:22:09 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-06-23 23:47:45 (GMT) |
commit | b9aaac5a6b7d228435fcb80963d41c274406011b (patch) | |
tree | 65c6e7a065d171d691b32391b5ccd81fe4b948bd /lib | |
parent | 595297a8f9bc27f8f4a537fd57ed6d0a2060fb46 (diff) | |
download | linux-b9aaac5a6b7d228435fcb80963d41c274406011b.tar.xz |
ocfs2: do not return DLM_MIGRATE_RESPONSE_MASTERY_REF to avoid endless,loop during umount
The following case may lead to endless loop during umount.
node A node B node C node D
umount volume,
migrate lockres1
to B
want to lock lockres1,
send
MASTER_REQUEST_MSG
to C
init block mle
send
MIGRATE_REQUEST_MSG
to C
find a block
mle, and then
return
DLM_MIGRATE_RESPONSE_MASTERY_REF
to B
set C in refmap
umount successfully
try to umount, endless
loop occurs when migrate
lockres1 since C is in
refmap
So we can fix this endless loop case by only returning
DLM_MIGRATE_RESPONSE_MASTERY_REF if it has a mastery mle when receiving
MIGRATE_REQUEST_MSG.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: jiangyiwen <jiangyiwen@huawei.com>
Reviewed-by: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Xue jiufei <xuejiufei@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions