[RFC PATCH 2/4] Define a new function xfs_inode_dquot()

Chandra Seetharaman
2012-01-23T17:31:58Z

Define a new function xfs_inode_dquot() that takes a inode pointer
and a disk quota type and returns the quota pointer for the specified
quota type.

This simplifies the xfs_qm_dqget() error path significantly.

Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com>
---
fs/xfs/xfs_dquot.c | 33 +++++++++------------------------
fs/xfs/xfs_dquot.h | 14 ++++++++++++++
2 files changed, 23 insertions(+), 24 deletions(-)

diff --git a/fs/xfs/xfs_dquot.h b/fs/xfs/xfs_dquot.h
index 221b22e..41cb5f4 100644
--- a/fs/xfs/xfs_dquot.h
+++ b/fs/xfs/xfs_dquot.h
@@ -129,6 +129,20 @@ static inline int xfs_this_quota_on(struct xfs_mount *mp, int type)
}
}

+static inline xfs_dquot_t *xfs_inode_dquot(struct xfs_inode *ip, int type)
+{
+ type &= XFS_DQ_ALLTYPES;
+ switch(type) {
+ case XFS_DQ_USER:
+ return ip->i_udquot;
+ case XFS_DQ_PROJ:
+ case XFS_DQ_GROUP:
+ return ip->i_gdquot;
+ default:
+ return NULL;
+ }
+}
+
#define XFS_DQ_IS_LOCKED(dqp) (mutex_is_locked(&((dqp)->q_qlock)))
#define XFS_DQ_IS_DIRTY(dqp) ((dqp)->dq_flags & XFS_DQ_DIRTY)
#define XFS_QM_ISUDQ(dqp) ((dqp)->dq_flags & XFS_DQ_USER)
diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c
index 4c8b3d2..bf4fe86 100644
--- a/fs/xfs/xfs_dquot.c
+++ b/fs/xfs/xfs_dquot.c
@@ -723,7 +723,7 @@ xfs_qm_dqget(
uint flags, /* DQALLOC, DQSUSER, DQREPAIR, DOWARN */
xfs_dquot_t **O_dqpp) /* OUT : locked incore dquot */
{
- xfs_dquot_t *dqp;
+ xfs_dquot_t *dqp, *dqp1;
xfs_dqhash_t *h;
uint version;
int error;
@@ -750,10 +750,7 @@ xfs_qm_dqget(
type == XFS_DQ_GROUP);
if (ip) {
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
- if (type == XFS_DQ_USER)
- ASSERT(ip->i_udquot == NULL);
- else
- ASSERT(ip->i_gdquot == NULL);
+ ASSERT(xfs_inode_dquot(ip, type) == NULL);
}
#endif

@@ -819,30 +816,18 @@ restart:
* A dquot could be attached to this inode by now, since
* we had dropped the ilock.
*/
- if (type == XFS_DQ_USER) {
- if (!XFS_IS_UQUOTA_ON(mp)) {
- /* inode stays locked on return */
- xfs_qm_dqdestroy(dqp);
- return XFS_ERROR(ESRCH);
- }
- if (ip->i_udquot) {
+ if (xfs_this_quota_on(mp, type)) {
+ dqp1 = xfs_inode_dquot(ip, type);
+ if (dqp1) {
xfs_qm_dqdestroy(dqp);
- dqp = ip->i_udquot;
+ dqp = dqp1;
xfs_dqlock(dqp);
goto dqret;
}
} else {
- if (!XFS_IS_OQUOTA_ON(mp)) {
- /* inode stays locked on return */
- xfs_qm_dqdestroy(dqp);
- return XFS_ERROR(ESRCH);
- }
- if (ip->i_gdquot) {
- xfs_qm_dqdestroy(dqp);
- dqp = ip->i_gdquot;
- xfs_dqlock(dqp);
- goto dqret;
- }
+ /* inode stays locked on return */
+ xfs_qm_dqdestroy(dqp);
+ return XFS_ERROR(ESRCH);
}
}

--
1.7.1