[PATCH 6/7] xfs: use generic inode iterator in xfs_qm_dqrele_all_inodes

Christoph Hellwig
2009-05-14T17:15:51Z

[-- Attachment #1: xfs-quota-sync-iterators --]
[-- Type: text/plain, Size: 5356 bytes --]

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>

Index: xfs/fs/xfs/quota/xfs_qm_syscalls.c
===================================================================
--- xfs.orig/fs/xfs/quota/xfs_qm_syscalls.c 2009-05-13 14:52:54.087659167 +0200
+++ xfs/fs/xfs/quota/xfs_qm_syscalls.c 2009-05-13 14:57:36.531661369 +0200
@@ -846,105 +846,55 @@ 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;
-
- 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;
- }
+ int error;

- /*
- * 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 0;

- 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, -1);
}

/*------------------------------------------------------------------------*/
Index: xfs/fs/xfs/linux-2.6/xfs_sync.c
===================================================================
--- xfs.orig/fs/xfs/linux-2.6/xfs_sync.c 2009-05-13 14:52:54.093659302 +0200
+++ xfs/fs/xfs/linux-2.6/xfs_sync.c 2009-05-13 14:57:18.322814622 +0200
@@ -141,7 +141,7 @@ restart:
return last_error;
}

-STATIC int
+int
xfs_inode_ag_iterator(
struct xfs_mount *mp,
int (*execute)(struct xfs_inode *ip,
@@ -166,7 +166,7 @@ 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)
Index: xfs/fs/xfs/linux-2.6/xfs_sync.h
===================================================================
--- xfs.orig/fs/xfs/linux-2.6/xfs_sync.h 2009-05-13 14:52:54.100659565 +0200
+++ xfs/fs/xfs/linux-2.6/xfs_sync.h 2009-05-13 14:57:18.331814510 +0200
@@ -56,4 +56,10 @@ void xfs_inode_set_reclaim_tag(struct xf
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