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xfs: use generic inode iterator in xfs_qm_dqrele_all_inodes 

Use xfs_inode_ag_iterator instead of opencoding the inode walk in the
quota code.  Mark xfs_inode_ag_iterator and xfs_sync_inode_valid non-static
to allow using them from the quota code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
Reviewed-by: Eric Sandeen <sandeen@sandeen.net>
This commit is contained in:
Christoph Hellwig 2009-06-08 15:35:27 +02:00 committed by Christoph Hellwig
parent 75f3cb1393
commit fe588ed328
3 changed files with 39 additions and 83 deletions
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4
fs/xfs/linux-2.6/xfs_sync.c
View File

@ -141,7 +141,7 @@ xfs_inode_ag_walk(
return last_error;
}
STATIC int
int
xfs_inode_ag_iterator(
struct xfs_mount *mp,
int (*execute)(struct xfs_inode *ip,
@ -167,7 +167,7 @@ xfs_inode_ag_iterator(
}
/* must be called with pag_ici_lock held and releases it */
STATIC int
int
xfs_sync_inode_valid(
struct xfs_inode *ip,
struct xfs_perag *pag)

6
fs/xfs/linux-2.6/xfs_sync.h
View File

@ -54,4 +54,10 @@ void xfs_inode_set_reclaim_tag(struct xfs_inode *ip);
void xfs_inode_clear_reclaim_tag(struct xfs_inode *ip);
void __xfs_inode_clear_reclaim_tag(struct xfs_mount *mp, struct xfs_perag *pag,
struct xfs_inode *ip);
int xfs_sync_inode_valid(struct xfs_inode *ip, struct xfs_perag *pag);
int xfs_inode_ag_iterator(struct xfs_mount *mp,
int (*execute)(struct xfs_inode *ip, struct xfs_perag *pag, int flags),
int flags, int tag);
#endif

112
fs/xfs/quota/xfs_qm_syscalls.c
View File

@ -847,105 +847,55 @@ xfs_qm_export_flags(
}
/*
* Release all the dquots on the inodes in an AG.
*/
STATIC void
xfs_qm_dqrele_inodes_ag(
xfs_mount_t *mp,
int ag,
uint flags)
STATIC int
xfs_dqrele_inode(
struct xfs_inode *ip,
struct xfs_perag *pag,
int flags)
{
xfs_inode_t *ip = NULL;
xfs_perag_t *pag = &mp->m_perag[ag];
int first_index = 0;
int nr_found;
int error;
do {
/*
* use a gang lookup to find the next inode in the tree
* as the tree is sparse and a gang lookup walks to find
* the number of objects requested.
*/
read_lock(&pag->pag_ici_lock);
nr_found = radix_tree_gang_lookup(&pag->pag_ici_root,
(void**)&ip, first_index, 1);
if (!nr_found) {
read_unlock(&pag->pag_ici_lock);
break;
}
/*
* Update the index for the next lookup. Catch overflows
* into the next AG range which can occur if we have inodes
* in the last block of the AG and we are currently
* pointing to the last inode.
*/
first_index = XFS_INO_TO_AGINO(mp, ip->i_ino + 1);
if (first_index < XFS_INO_TO_AGINO(mp, ip->i_ino)) {
read_unlock(&pag->pag_ici_lock);
break;
}
/* skip quota inodes */
if (ip == XFS_QI_UQIP(mp) || ip == XFS_QI_GQIP(mp)) {
ASSERT(ip->i_udquot == NULL);
ASSERT(ip->i_gdquot == NULL);
read_unlock(&pag->pag_ici_lock);
continue;
}
/*
* If we can't get a reference on the inode, it must be
* in reclaim. Leave it for the reclaim code to flush.
*/
if (!igrab(VFS_I(ip))) {
read_unlock(&pag->pag_ici_lock);
continue;
}
/* skip quota inodes */
if (ip == XFS_QI_UQIP(ip->i_mount) || ip == XFS_QI_GQIP(ip->i_mount)) {
ASSERT(ip->i_udquot == NULL);
ASSERT(ip->i_gdquot == NULL);
read_unlock(&pag->pag_ici_lock);
return 0;
}
/* avoid new inodes though we shouldn't find any here */
if (xfs_iflags_test(ip, XFS_INEW)) {
IRELE(ip);
continue;
}
error = xfs_sync_inode_valid(ip, pag);
if (error)
return error;
xfs_ilock(ip, XFS_ILOCK_EXCL);
if ((flags & XFS_UQUOTA_ACCT) && ip->i_udquot) {
xfs_qm_dqrele(ip->i_udquot);
ip->i_udquot = NULL;
}
if (flags & (XFS_PQUOTA_ACCT|XFS_GQUOTA_ACCT) &&
ip->i_gdquot) {
xfs_qm_dqrele(ip->i_gdquot);
ip->i_gdquot = NULL;
}
xfs_iput(ip, XFS_ILOCK_EXCL);
xfs_ilock(ip, XFS_ILOCK_EXCL);
if ((flags & XFS_UQUOTA_ACCT) && ip->i_udquot) {
xfs_qm_dqrele(ip->i_udquot);
ip->i_udquot = NULL;
}
if (flags & (XFS_PQUOTA_ACCT|XFS_GQUOTA_ACCT) && ip->i_gdquot) {
xfs_qm_dqrele(ip->i_gdquot);
ip->i_gdquot = NULL;
}
xfs_iput(ip, XFS_ILOCK_EXCL);
IRELE(ip);
} while (nr_found);
return 0;
}
/*
* Go thru all the inodes in the file system, releasing their dquots.
*
* Note that the mount structure gets modified to indicate that quotas are off
* AFTER this, in the case of quotaoff. This also gets called from
* xfs_rootumount.
* AFTER this, in the case of quotaoff.
*/
void
xfs_qm_dqrele_all_inodes(
struct xfs_mount *mp,
uint flags)
{
int i;
ASSERT(mp->m_quotainfo);
for (i = 0; i < mp->m_sb.sb_agcount; i++) {
if (!mp->m_perag[i].pag_ici_init)
continue;
xfs_qm_dqrele_inodes_ag(mp, i, flags);
}
xfs_inode_ag_iterator(mp, xfs_dqrele_inode, flags, XFS_ICI_NO_TAG);
}
/*------------------------------------------------------------------------*/