diff options
| author | Lai Siyao <lai.siyao@intel.com> | 2015-03-25 21:53:26 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-26 11:11:44 +0100 |
| commit | d6abc59ec8440cf3677a54d6fb12afbd20f70821 (patch) | |
| tree | 9f9508ee35566b18228c3c546114abb5e55797de | |
| parent | 3ce08cd7a281e11d83ac3f92832522cf4a2f549c (diff) | |
staging/lustre/xattr: xattr data may be gone with lock held
Xattr cached data may be gone, but lock still held, in this case,
refetch xattr from server, otherwise client will return error.
Signed-off-by: Lai Siyao <lai.siyao@intel.com>
Reviewed-on: http://review.whamcloud.com/12952
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3544
Reviewed-by: Bobi Jam <bobijam@hotmail.com>
Reviewed-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Signed-off-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/staging/lustre/lustre/llite/xattr_cache.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/drivers/staging/lustre/lustre/llite/xattr_cache.c b/drivers/staging/lustre/lustre/llite/xattr_cache.c index da190f92d140..69ea92adf4f1 100644 --- a/drivers/staging/lustre/lustre/llite/xattr_cache.c +++ b/drivers/staging/lustre/lustre/llite/xattr_cache.c @@ -295,13 +295,18 @@ static int ll_xattr_find_get_lock(struct inode *inode, mutex_lock(&lli->lli_xattrs_enq_lock); - /* Try matching first. */ - mode = ll_take_md_lock(inode, MDS_INODELOCK_XATTR, &lockh, 0, LCK_PR); - if (mode != 0) { - /* fake oit in mdc_revalidate_lock() manner */ - oit->d.lustre.it_lock_handle = lockh.cookie; - oit->d.lustre.it_lock_mode = mode; - goto out; + /* inode may have been shrunk and recreated, so data is gone, match lock + * only when data exists. */ + if (ll_xattr_cache_valid(lli)) { + /* Try matching first. */ + mode = ll_take_md_lock(inode, MDS_INODELOCK_XATTR, &lockh, 0, + LCK_PR); + if (mode != 0) { + /* fake oit in mdc_revalidate_lock() manner */ + oit->d.lustre.it_lock_handle = lockh.cookie; + oit->d.lustre.it_lock_mode = mode; + goto out; + } } /* Enqueue if the lock isn't cached locally. */ |