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xfs: split out dqget for inodes from regular dqget 

There are two uses of dqget here -- one is to return the dquot for a
given type and id, and the other is to return the dquot for a given type
and inode.  Those are two separate things, so split them into two
smaller functions.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong 2018-05-04 15:30:22 -07:00
parent c14cfccabe
commit 4882c19d2a
8 changed files with 133 additions and 76 deletions
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146
fs/xfs/xfs_dquot.c
View File

@ -790,24 +790,19 @@ xfs_qm_dqget_checks(
}
/*
* Given the file system, inode OR id, and type (UDQUOT/GDQUOT), return a
* a locked dquot, doing an allocation (if requested) as needed.
* When both an inode and an id are given, the inode's id takes precedence.
* That is, if the id changes while we don't hold the ilock inside this
* function, the new dquot is returned, not necessarily the one requested
* in the id argument.
* Given the file system, id, and type (UDQUOT/GDQUOT), return a a locked
* dquot, doing an allocation (if requested) as needed.
*/
int
xfs_qm_dqget(
xfs_mount_t *mp,
xfs_inode_t *ip, /* locked inode (optional) */
xfs_dqid_t id, /* uid/projid/gid depending on type */
uint type, /* XFS_DQ_USER/XFS_DQ_PROJ/XFS_DQ_GROUP */
uint flags, /* DQALLOC, DQSUSER, DQREPAIR, DOWARN */
xfs_dquot_t **O_dqpp) /* OUT : locked incore dquot */
struct xfs_mount *mp,
xfs_dqid_t id,
uint type,
uint flags, /* DQALLOC, DQSUSER, DQREPAIR, DOWARN */
struct xfs_dquot **O_dqpp)
{
struct xfs_quotainfo *qi = mp->m_quotainfo;
struct radix_tree_root *tree = xfs_dquot_tree(qi, type);
struct radix_tree_root *tree = xfs_dquot_tree(qi, type);
struct xfs_dquot *dqp;
int error;
@ -815,11 +810,83 @@ xfs_qm_dqget(
if (error)
return error;
if (ip) {
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
ASSERT(xfs_inode_dquot(ip, type) == NULL);
restart:
dqp = xfs_qm_dqget_cache_lookup(mp, qi, tree, id);
if (dqp) {
*O_dqpp = dqp;
return 0;
}
error = xfs_qm_dqread(mp, id, type, flags, &dqp);
if (error)
return error;
error = xfs_qm_dqget_cache_insert(mp, qi, tree, id, dqp);
if (error) {
/*
* Duplicate found. Just throw away the new dquot and start
* over.
*/
xfs_qm_dqdestroy(dqp);
XFS_STATS_INC(mp, xs_qm_dquot_dups);
goto restart;
}
trace_xfs_dqget_miss(dqp);
*O_dqpp = dqp;
return 0;
}
/* Return the quota id for a given inode and type. */
xfs_dqid_t
xfs_qm_id_for_quotatype(
struct xfs_inode *ip,
uint type)
{
switch (type) {
case XFS_DQ_USER:
return ip->i_d.di_uid;
case XFS_DQ_GROUP:
return ip->i_d.di_gid;
case XFS_DQ_PROJ:
return xfs_get_projid(ip);
}
ASSERT(0);
return 0;
}
/*
* Return the dquot for a given inode and type. If @can_alloc is true, then
* allocate blocks if needed. The inode's ILOCK must be held and it must not
* have already had an inode attached.
*/
int
xfs_qm_dqget_inode(
struct xfs_inode *ip,
uint type,
bool can_alloc,
struct xfs_dquot **O_dqpp)
{
struct xfs_mount *mp = ip->i_mount;
struct xfs_quotainfo *qi = mp->m_quotainfo;
struct radix_tree_root *tree = xfs_dquot_tree(qi, type);
struct xfs_dquot *dqp;
xfs_dqid_t id;
uint flags = 0;
int error;
error = xfs_qm_dqget_checks(mp, type);
if (error)
return error;
if (can_alloc)
flags |= XFS_QMOPT_DQALLOC;
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
ASSERT(xfs_inode_dquot(ip, type) == NULL);
id = xfs_qm_id_for_quotatype(ip, type);
restart:
dqp = xfs_qm_dqget_cache_lookup(mp, qi, tree, id);
if (dqp) {
@ -834,37 +901,30 @@ restart:
* lock here means dealing with a chown that can happen before
* we re-acquire the lock.
*/
if (ip)
xfs_iunlock(ip, XFS_ILOCK_EXCL);
xfs_iunlock(ip, XFS_ILOCK_EXCL);
error = xfs_qm_dqread(mp, id, type, flags, &dqp);
if (ip)
xfs_ilock(ip, XFS_ILOCK_EXCL);
xfs_ilock(ip, XFS_ILOCK_EXCL);
if (error)
return error;
if (ip) {
/*
* A dquot could be attached to this inode by now, since
* we had dropped the ilock.
*/
if (xfs_this_quota_on(mp, type)) {
struct xfs_dquot *dqp1;
/*
* A dquot could be attached to this inode by now, since we had
* dropped the ilock.
*/
if (xfs_this_quota_on(mp, type)) {
struct xfs_dquot *dqp1;
dqp1 = xfs_inode_dquot(ip, type);
if (dqp1) {
xfs_qm_dqdestroy(dqp);
dqp = dqp1;
xfs_dqlock(dqp);
goto dqret;
}
} else {
/* inode stays locked on return */
dqp1 = xfs_inode_dquot(ip, type);
if (dqp1) {
xfs_qm_dqdestroy(dqp);
return -ESRCH;
dqp = dqp1;
xfs_dqlock(dqp);
goto dqret;
}
} else {
/* inode stays locked on return */
xfs_qm_dqdestroy(dqp);
return -ESRCH;
}
error = xfs_qm_dqget_cache_insert(mp, qi, tree, id, dqp);
@ -878,8 +938,8 @@ restart:
goto restart;
}
dqret:
ASSERT((ip == NULL) || xfs_isilocked(ip, XFS_ILOCK_EXCL));
dqret:
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
trace_xfs_dqget_miss(dqp);
*O_dqpp = dqp;
return 0;
@ -901,7 +961,7 @@ xfs_qm_dqget_next(
*dqpp = NULL;
for (; !error; error = xfs_dq_get_next_id(mp, type, &id)) {
error = xfs_qm_dqget(mp, NULL, id, type, 0, &dqp);
error = xfs_qm_dqget(mp, id, type, 0, &dqp);
if (error == -ENOENT)
continue;
else if (error != 0)

10
fs/xfs/xfs_dquot.h
View File

@ -169,8 +169,14 @@ extern void xfs_qm_adjust_dqtimers(xfs_mount_t *,
xfs_disk_dquot_t *);
extern void xfs_qm_adjust_dqlimits(struct xfs_mount *,
struct xfs_dquot *);
extern int xfs_qm_dqget(xfs_mount_t *, xfs_inode_t *,
xfs_dqid_t, uint, uint, xfs_dquot_t **);
extern xfs_dqid_t xfs_qm_id_for_quotatype(struct xfs_inode *ip,
uint type);
extern int xfs_qm_dqget(struct xfs_mount *mp, xfs_dqid_t id,
uint type, uint flags,
struct xfs_dquot **dqpp);
extern int xfs_qm_dqget_inode(struct xfs_inode *ip, uint type,
bool can_alloc,
struct xfs_dquot **dqpp);
extern int xfs_qm_dqget_next(struct xfs_mount *mp, xfs_dqid_t id,
uint type, struct xfs_dquot **dqpp);
extern void xfs_qm_dqput(xfs_dquot_t *);

2
fs/xfs/xfs_iomap.c
View File

@ -576,7 +576,7 @@ xfs_file_iomap_begin_delay(
goto done;
}
error = xfs_qm_dqattach_locked(ip, 0);
error = xfs_qm_dqattach_locked(ip, false);
if (error)
goto out_unlock;

39
fs/xfs/xfs_qm.c
View File

@ -262,7 +262,7 @@ xfs_qm_dqattach_one(
xfs_inode_t *ip,
xfs_dqid_t id,
uint type,
uint doalloc,
bool doalloc,
xfs_dquot_t **IO_idqpp)
{
xfs_dquot_t *dqp;
@ -288,7 +288,7 @@ xfs_qm_dqattach_one(
* exist on disk and we didn't ask it to allocate; ESRCH if quotas got
* turned off suddenly.
*/
error = xfs_qm_dqget(ip->i_mount, ip, id, type, doalloc, &dqp);
error = xfs_qm_dqget_inode(ip, type, doalloc, &dqp);
if (error)
return error;
@ -330,7 +330,7 @@ xfs_qm_need_dqattach(
int
xfs_qm_dqattach_locked(
xfs_inode_t *ip,
uint flags)
bool doalloc)
{
xfs_mount_t *mp = ip->i_mount;
int error = 0;
@ -342,8 +342,7 @@ xfs_qm_dqattach_locked(
if (XFS_IS_UQUOTA_ON(mp) && !ip->i_udquot) {
error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER,
flags & XFS_QMOPT_DQALLOC,
&ip->i_udquot);
doalloc, &ip->i_udquot);
if (error)
goto done;
ASSERT(ip->i_udquot);
@ -351,8 +350,7 @@ xfs_qm_dqattach_locked(
if (XFS_IS_GQUOTA_ON(mp) && !ip->i_gdquot) {
error = xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP,
flags & XFS_QMOPT_DQALLOC,
&ip->i_gdquot);
doalloc, &ip->i_gdquot);
if (error)
goto done;
ASSERT(ip->i_gdquot);
@ -360,8 +358,7 @@ xfs_qm_dqattach_locked(
if (XFS_IS_PQUOTA_ON(mp) && !ip->i_pdquot) {
error = xfs_qm_dqattach_one(ip, xfs_get_projid(ip), XFS_DQ_PROJ,
flags & XFS_QMOPT_DQALLOC,
&ip->i_pdquot);
doalloc, &ip->i_pdquot);
if (error)
goto done;
ASSERT(ip->i_pdquot);
@ -386,7 +383,7 @@ xfs_qm_dqattach(
return 0;
xfs_ilock(ip, XFS_ILOCK_EXCL);
error = xfs_qm_dqattach_locked(ip, 0);
error = xfs_qm_dqattach_locked(ip, false);
xfs_iunlock(ip, XFS_ILOCK_EXCL);
return error;
@ -1068,7 +1065,7 @@ xfs_qm_quotacheck_dqadjust(
struct xfs_dquot *dqp;
int error;
error = xfs_qm_dqget(mp, ip, id, type, XFS_QMOPT_DQALLOC, &dqp);
error = xfs_qm_dqget_inode(ip, type, true, &dqp);
if (error) {
/*
* Shouldn't be able to turn off quotas here.
@ -1667,7 +1664,7 @@ xfs_qm_vop_dqalloc(
* if necessary. The dquot(s) will not be locked.
*/
if (XFS_NOT_DQATTACHED(mp, ip)) {
error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC);
error = xfs_qm_dqattach_locked(ip, true);
if (error) {
xfs_iunlock(ip, lockflags);
return error;
@ -1686,10 +1683,8 @@ xfs_qm_vop_dqalloc(
* holding ilock.
*/
xfs_iunlock(ip, lockflags);
error = xfs_qm_dqget(mp, NULL, uid,
XFS_DQ_USER,
XFS_QMOPT_DQALLOC,
&uq);
error = xfs_qm_dqget(mp, uid, XFS_DQ_USER,
XFS_QMOPT_DQALLOC, &uq);
if (error) {
ASSERT(error != -ENOENT);
return error;
@ -1712,10 +1707,8 @@ xfs_qm_vop_dqalloc(
if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
if (ip->i_d.di_gid != gid) {
xfs_iunlock(ip, lockflags);
error = xfs_qm_dqget(mp, NULL, gid,
XFS_DQ_GROUP,
XFS_QMOPT_DQALLOC,
&gq);
error = xfs_qm_dqget(mp, gid, XFS_DQ_GROUP,
XFS_QMOPT_DQALLOC, &gq);
if (error) {
ASSERT(error != -ENOENT);
goto error_rele;
@ -1731,10 +1724,8 @@ xfs_qm_vop_dqalloc(
if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
if (xfs_get_projid(ip) != prid) {
xfs_iunlock(ip, lockflags);
error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
XFS_DQ_PROJ,
XFS_QMOPT_DQALLOC,
&pq);
error = xfs_qm_dqget(mp, (xfs_dqid_t)prid, XFS_DQ_PROJ,
XFS_QMOPT_DQALLOC, &pq);
if (error) {
ASSERT(error != -ENOENT);
goto error_rele;

2
fs/xfs/xfs_qm_bhv.c
View File

@ -72,7 +72,7 @@ xfs_qm_statvfs(
xfs_mount_t *mp = ip->i_mount;
xfs_dquot_t *dqp;
if (!xfs_qm_dqget(mp, NULL, xfs_get_projid(ip), XFS_DQ_PROJ, 0, &dqp)) {
if (!xfs_qm_dqget(mp, xfs_get_projid(ip), XFS_DQ_PROJ, 0, &dqp)) {
xfs_fill_statvfs_from_dquot(statp, dqp);
xfs_qm_dqput(dqp);
}

4
fs/xfs/xfs_qm_syscalls.c
View File

@ -425,7 +425,7 @@ xfs_qm_scall_setqlim(
* a reference to the dquot, so it's safe to do this unlock/lock without
* it being reclaimed in the mean time.
*/
error = xfs_qm_dqget(mp, NULL, id, type, XFS_QMOPT_DQALLOC, &dqp);
error = xfs_qm_dqget(mp, id, type, XFS_QMOPT_DQALLOC, &dqp);
if (error) {
ASSERT(error != -ENOENT);
goto out_unlock;
@ -700,7 +700,7 @@ xfs_qm_scall_getquota(
* we aren't passing the XFS_QMOPT_DOALLOC flag. If it doesn't
* exist, we'll get ENOENT back.
*/
error = xfs_qm_dqget(mp, NULL, id, type, 0, &dqp);
error = xfs_qm_dqget(mp, id, type, 0, &dqp);
if (error)
return error;

2
fs/xfs/xfs_quota.h
View File

@ -91,7 +91,7 @@ extern int xfs_qm_vop_chown_reserve(struct xfs_trans *, struct xfs_inode *,
struct xfs_dquot *, struct xfs_dquot *,
struct xfs_dquot *, uint);
extern int xfs_qm_dqattach(struct xfs_inode *);
extern int xfs_qm_dqattach_locked(struct xfs_inode *, uint);
extern int xfs_qm_dqattach_locked(struct xfs_inode *ip, bool doalloc);
extern void xfs_qm_dqdetach(struct xfs_inode *);
extern void xfs_qm_dqrele(struct xfs_dquot *);
extern void xfs_qm_statvfs(struct xfs_inode *, struct kstatfs *);

4
fs/xfs/xfs_reflink.c
View File

@ -305,7 +305,7 @@ xfs_reflink_reserve_cow(
* Fork all the shared blocks from our write offset until the end of
* the extent.
*/
error = xfs_qm_dqattach_locked(ip, 0);
error = xfs_qm_dqattach_locked(ip, false);
if (error)
return error;
@ -431,7 +431,7 @@ retry:
if (error)
return error;
error = xfs_qm_dqattach_locked(ip, 0);
error = xfs_qm_dqattach_locked(ip, false);
if (error)
goto out;
goto retry;