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lustre/mdc: Check for all attributes validity in revalidate

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GETATTR needs to return attributes protected by different bits, so
we need to ensure all we have locks with all of those bits, not
just UPDATE bit

Signed-off-by: Alexey Lyashkov <alexey_lyashkov@xyratex.com>
Signed-off-by: Oleg Drokin <oleg.drokin@intel.com>
Reviewed-on: http://review.whamcloud.com/6460
Xyratex-bug-id: MRP-1052
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3240
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: wangdi <di.wang@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Oleg Drokin
2014-02-28 21:16:31 -05:00
committed by Greg Kroah-Hartman
parent 45b2a01074
commit bf08ee0d3f
1 changed files with 15 additions and 1 deletions
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16
drivers/staging/lustre/lustre/mdc/mdc_locks.c
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@@ -1061,7 +1061,20 @@ int mdc_revalidate_lock(struct obd_export *exp, struct lookup_intent *it,
fid_build_reg_res_name(fid, &res_id);
switch (it->it_op) {
case IT_GETATTR:
policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
/* File attributes are held under multiple bits:
* nlink is under lookup lock, size and times are
* under UPDATE lock and recently we've also got
* a separate permissions lock for owner/group/acl that
* were protected by lookup lock before.
* Getattr must provide all of that information,
* so we need to ensure we have all of those locks.
* Unfortunately, if the bits are split across multiple
* locks, there's no easy way to match all of them here,
* so an extra RPC would be performed to fetch all
* of those bits at once for now. */
policy.l_inodebits.bits = MDS_INODELOCK_UPDATE |
MDS_INODELOCK_LOOKUP |
MDS_INODELOCK_PERM;
break;
case IT_LAYOUT:
policy.l_inodebits.bits = MDS_INODELOCK_LAYOUT;
@@ -1070,6 +1083,7 @@ int mdc_revalidate_lock(struct obd_export *exp, struct lookup_intent *it,
policy.l_inodebits.bits = MDS_INODELOCK_LOOKUP;
break;
}
mode = ldlm_lock_match(exp->exp_obd->obd_namespace,
LDLM_FL_BLOCK_GRANTED, &res_id,
LDLM_IBITS, &policy,