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| author | xuejiufei <xuejiufei@huawei.com> | 2016-01-14 15:17:41 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-01-14 16:00:49 -0800 |
| commit | 32e493265b2be96404aaa478fb2913be29b06887 (patch) | |
| tree | a2cdd4bbd5c06207c614a2ce8e9234bb7bcfdb7e /fs/ocfs2/dlm/dlmmaster.c | |
| parent | bef5502de074b6f6fa647b94b73155d675694420 (diff) | |
| download | lwn-32e493265b2be96404aaa478fb2913be29b06887.tar.gz lwn-32e493265b2be96404aaa478fb2913be29b06887.zip | |
ocfs2/dlm: do not insert a new mle when another process is already migrating
When two processes are migrating the same lockres,
dlm_add_migration_mle() return -EEXIST, but insert a new mle in hash
list. dlm_migrate_lockres() will detach the old mle and free the new
one which is already in hash list, that will destroy the list.
Signed-off-by: Jiufei Xue <xuejiufei@huawei.com>
Reviewed-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Reviewed-by: Junxiao Bi <junxiao.bi@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ocfs2/dlm/dlmmaster.c')
| -rw-r--r-- | fs/ocfs2/dlm/dlmmaster.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c index 8b9d483e94a6..9477d6e1de37 100644 --- a/fs/ocfs2/dlm/dlmmaster.c +++ b/fs/ocfs2/dlm/dlmmaster.c @@ -2549,7 +2549,7 @@ static int dlm_migrate_lockres(struct dlm_ctxt *dlm, } fail: - if (oldmle) { + if (ret != -EEXIST && oldmle) { /* master is known, detach if not already detached */ dlm_mle_detach_hb_events(dlm, oldmle); dlm_put_mle(oldmle); @@ -3136,7 +3136,8 @@ static int dlm_add_migration_mle(struct dlm_ctxt *dlm, mlog(0, "tried to migrate %.*s, but some " "process beat me to it\n", namelen, name); - ret = -EEXIST; + spin_unlock(&tmp->spinlock); + return -EEXIST; } else { /* bad. 2 NODES are trying to migrate! */ mlog(ML_ERROR, "migration error mle: " |