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authorChristoph Hellwig <hch@infradead.org>2010-05-28 19:03:10 +0000
committerAlex Elder <aelder@sgi.com>2010-05-28 15:19:56 -0500
commitfb3b504adeee942e55393396fea8fdf406acf037 (patch)
tree42486eb1c674ba2d76b719109e21a54a7df7b8fc /fs/xfs/xfs_mount.c
parent9b98b6f3e1534bba2efcd5b16318945cf2218d99 (diff)
xfs: fix access to upper inodes without inode64
If a filesystem is mounted without the inode64 mount option we should still be able to access inodes not fitting into 32 bits, just not created new ones. For this to work we need to make sure the inode cache radix tree is initialized for all allocation groups, not just those we plan to allocate inodes from. This patch makes sure we initialize the inode cache radix tree for all allocation groups, and also cleans xfs_initialize_perag up a bit to separate the inode32 logical from the general perag structure setup. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_mount.c')
-rw-r--r--fs/xfs/xfs_mount.c52
1 files changed, 21 insertions, 31 deletions
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index ef1233b09683..d59f4e8bedcf 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -413,17 +413,6 @@ xfs_mount_validate_sb(
return 0;
}
-STATIC void
-xfs_initialize_perag_icache(
- xfs_perag_t *pag)
-{
- if (!pag->pag_ici_init) {
- rwlock_init(&pag->pag_ici_lock);
- INIT_RADIX_TREE(&pag->pag_ici_root, GFP_ATOMIC);
- pag->pag_ici_init = 1;
- }
-}
-
int
xfs_initialize_perag(
xfs_mount_t *mp,
@@ -436,13 +425,8 @@ xfs_initialize_perag(
xfs_agino_t agino;
xfs_ino_t ino;
xfs_sb_t *sbp = &mp->m_sb;
- xfs_ino_t max_inum = XFS_MAXINUMBER_32;
int error = -ENOMEM;
- /* Check to see if the filesystem can overflow 32 bit inodes */
- agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks - 1, 0);
- ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino);
-
/*
* Walk the current per-ag tree so we don't try to initialise AGs
* that already exist (growfs case). Allocate and insert all the
@@ -456,11 +440,18 @@ xfs_initialize_perag(
}
if (!first_initialised)
first_initialised = index;
+
pag = kmem_zalloc(sizeof(*pag), KM_MAYFAIL);
if (!pag)
goto out_unwind;
+ pag->pag_agno = index;
+ pag->pag_mount = mp;
+ rwlock_init(&pag->pag_ici_lock);
+ INIT_RADIX_TREE(&pag->pag_ici_root, GFP_ATOMIC);
+
if (radix_tree_preload(GFP_NOFS))
goto out_unwind;
+
spin_lock(&mp->m_perag_lock);
if (radix_tree_insert(&mp->m_perag_tree, index, pag)) {
BUG();
@@ -469,25 +460,26 @@ xfs_initialize_perag(
error = -EEXIST;
goto out_unwind;
}
- pag->pag_agno = index;
- pag->pag_mount = mp;
spin_unlock(&mp->m_perag_lock);
radix_tree_preload_end();
}
- /* Clear the mount flag if no inode can overflow 32 bits
- * on this filesystem, or if specifically requested..
+ /*
+ * If we mount with the inode64 option, or no inode overflows
+ * the legacy 32-bit address space clear the inode32 option.
*/
- if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) && ino > max_inum) {
+ agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks - 1, 0);
+ ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino);
+
+ if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) && ino > XFS_MAXINUMBER_32)
mp->m_flags |= XFS_MOUNT_32BITINODES;
- } else {
+ else
mp->m_flags &= ~XFS_MOUNT_32BITINODES;
- }
- /* If we can overflow then setup the ag headers accordingly */
if (mp->m_flags & XFS_MOUNT_32BITINODES) {
- /* Calculate how much should be reserved for inodes to
- * meet the max inode percentage.
+ /*
+ * Calculate how much should be reserved for inodes to meet
+ * the max inode percentage.
*/
if (mp->m_maxicount) {
__uint64_t icount;
@@ -500,30 +492,28 @@ xfs_initialize_perag(
} else {
max_metadata = agcount;
}
+
for (index = 0; index < agcount; index++) {
ino = XFS_AGINO_TO_INO(mp, index, agino);
- if (ino > max_inum) {
+ if (ino > XFS_MAXINUMBER_32) {
index++;
break;
}
- /* This ag is preferred for inodes */
pag = xfs_perag_get(mp, index);
pag->pagi_inodeok = 1;
if (index < max_metadata)
pag->pagf_metadata = 1;
- xfs_initialize_perag_icache(pag);
xfs_perag_put(pag);
}
} else {
- /* Setup default behavior for smaller filesystems */
for (index = 0; index < agcount; index++) {
pag = xfs_perag_get(mp, index);
pag->pagi_inodeok = 1;
- xfs_initialize_perag_icache(pag);
xfs_perag_put(pag);
}
}
+
if (maxagi)
*maxagi = index;
return 0;