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authorChristoph Hellwig <hch@lst.de>2009-03-29 19:26:46 +0200
committerChristoph Hellwig <hch@brick.lst.de>2009-03-29 19:26:46 +0200
commit1a5902c5d2ad4f3aa1ee747017622d5d4edfa20f (patch)
treecf93367c9b63f814095351c1eeb8d7cc1c2d3f9f /fs/xfs
parent9da096fd13e63031662566e5e868ec3dcc70824e (diff)
downloadlinux-1a5902c5d2ad4f3aa1ee747017622d5d4edfa20f.tar.bz2
xfs: remove m_attroffset
With the upcoming v3 inodes the default attroffset needs to be calculated for each specific inode, so we can't cache it in the superblock anymore. Also replace the assert for wrong inode sizes with a proper error check also included in non-debug builds. Note that the ENOSYS return for that might seem odd, but that error is returned by xfs_mount_validate_sb for all theoretically valid but not supported filesystem geometries. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
Diffstat (limited to 'fs/xfs')
-rw-r--r--fs/xfs/xfs_attr_leaf.c3
-rw-r--r--fs/xfs/xfs_bmap.c56
-rw-r--r--fs/xfs/xfs_bmap.h4
-rw-r--r--fs/xfs/xfs_mount.c37
-rw-r--r--fs/xfs/xfs_mount.h1
5 files changed, 62 insertions, 39 deletions
diff --git a/fs/xfs/xfs_attr_leaf.c b/fs/xfs/xfs_attr_leaf.c
index aa001629b596..afdc8911637d 100644
--- a/fs/xfs/xfs_attr_leaf.c
+++ b/fs/xfs/xfs_attr_leaf.c
@@ -155,7 +155,8 @@ xfs_attr_shortform_bytesfit(xfs_inode_t *dp, int bytes)
* minimum offset only needs to be the space required for
* the btree root.
*/
- if (!dp->i_d.di_forkoff && dp->i_df.if_bytes > mp->m_attroffset)
+ if (!dp->i_d.di_forkoff && dp->i_df.if_bytes >
+ xfs_default_attroffset(dp))
dsize = XFS_BMDR_SPACE_CALC(MINDBTPTRS);
break;
diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c
index 47a87de35af5..3a6ed426327a 100644
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/xfs_bmap.c
@@ -3569,6 +3569,27 @@ xfs_bmap_extents_to_btree(
}
/*
+ * Calculate the default attribute fork offset for newly created inodes.
+ */
+uint
+xfs_default_attroffset(
+ struct xfs_inode *ip)
+{
+ struct xfs_mount *mp = ip->i_mount;
+ uint offset;
+
+ if (mp->m_sb.sb_inodesize == 256) {
+ offset = XFS_LITINO(mp) -
+ XFS_BMDR_SPACE_CALC(MINABTPTRS);
+ } else {
+ offset = XFS_BMDR_SPACE_CALC(6 * MINABTPTRS);
+ }
+
+ ASSERT(offset < XFS_LITINO(mp));
+ return offset;
+}
+
+/*
* Helper routine to reset inode di_forkoff field when switching
* attribute fork from local to extent format - we reset it where
* possible to make space available for inline data fork extents.
@@ -3580,15 +3601,18 @@ xfs_bmap_forkoff_reset(
int whichfork)
{
if (whichfork == XFS_ATTR_FORK &&
- (ip->i_d.di_format != XFS_DINODE_FMT_DEV) &&
- (ip->i_d.di_format != XFS_DINODE_FMT_UUID) &&
- (ip->i_d.di_format != XFS_DINODE_FMT_BTREE) &&
- ((mp->m_attroffset >> 3) > ip->i_d.di_forkoff)) {
- ip->i_d.di_forkoff = mp->m_attroffset >> 3;
- ip->i_df.if_ext_max = XFS_IFORK_DSIZE(ip) /
- (uint)sizeof(xfs_bmbt_rec_t);
- ip->i_afp->if_ext_max = XFS_IFORK_ASIZE(ip) /
- (uint)sizeof(xfs_bmbt_rec_t);
+ ip->i_d.di_format != XFS_DINODE_FMT_DEV &&
+ ip->i_d.di_format != XFS_DINODE_FMT_UUID &&
+ ip->i_d.di_format != XFS_DINODE_FMT_BTREE) {
+ uint dfl_forkoff = xfs_default_attroffset(ip) >> 3;
+
+ if (dfl_forkoff > ip->i_d.di_forkoff) {
+ ip->i_d.di_forkoff = dfl_forkoff;
+ ip->i_df.if_ext_max =
+ XFS_IFORK_DSIZE(ip) / sizeof(xfs_bmbt_rec_t);
+ ip->i_afp->if_ext_max =
+ XFS_IFORK_ASIZE(ip) / sizeof(xfs_bmbt_rec_t);
+ }
}
}
@@ -4057,7 +4081,7 @@ xfs_bmap_add_attrfork(
case XFS_DINODE_FMT_BTREE:
ip->i_d.di_forkoff = xfs_attr_shortform_bytesfit(ip, size);
if (!ip->i_d.di_forkoff)
- ip->i_d.di_forkoff = mp->m_attroffset >> 3;
+ ip->i_d.di_forkoff = xfs_default_attroffset(ip) >> 3;
else if (mp->m_flags & XFS_MOUNT_ATTR2)
version = 2;
break;
@@ -4204,12 +4228,12 @@ xfs_bmap_compute_maxlevels(
* (a signed 16-bit number, xfs_aextnum_t).
*
* Note that we can no longer assume that if we are in ATTR1 that
- * the fork offset of all the inodes will be (m_attroffset >> 3)
- * because we could have mounted with ATTR2 and then mounted back
- * with ATTR1, keeping the di_forkoff's fixed but probably at
- * various positions. Therefore, for both ATTR1 and ATTR2
- * we have to assume the worst case scenario of a minimum size
- * available.
+ * the fork offset of all the inodes will be
+ * (xfs_default_attroffset(ip) >> 3) because we could have mounted
+ * with ATTR2 and then mounted back with ATTR1, keeping the
+ * di_forkoff's fixed but probably at various positions. Therefore,
+ * for both ATTR1 and ATTR2 we have to assume the worst case scenario
+ * of a minimum size available.
*/
if (whichfork == XFS_DATA_FORK) {
maxleafents = MAXEXTNUM;
diff --git a/fs/xfs/xfs_bmap.h b/fs/xfs/xfs_bmap.h
index 589d3dabdd17..1b8ff9256bd0 100644
--- a/fs/xfs/xfs_bmap.h
+++ b/fs/xfs/xfs_bmap.h
@@ -338,6 +338,10 @@ xfs_check_nostate_extents(
xfs_extnum_t idx,
xfs_extnum_t num);
+uint
+xfs_default_attroffset(
+ struct xfs_inode *ip);
+
#ifdef __KERNEL__
/*
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index 1c372f998c15..92fedfcc879a 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -256,6 +256,22 @@ xfs_mount_validate_sb(
return XFS_ERROR(ENOSYS);
}
+ /*
+ * Currently only very few inode sizes are supported.
+ */
+ switch (sbp->sb_inodesize) {
+ case 256:
+ case 512:
+ case 1024:
+ case 2048:
+ break;
+ default:
+ xfs_fs_mount_cmn_err(flags,
+ "inode size of %d bytes not supported",
+ sbp->sb_inodesize);
+ return XFS_ERROR(ENOSYS);
+ }
+
if (xfs_sb_validate_fsb_count(sbp, sbp->sb_dblocks) ||
xfs_sb_validate_fsb_count(sbp, sbp->sb_rblocks)) {
xfs_fs_mount_cmn_err(flags,
@@ -578,27 +594,6 @@ xfs_mount_common(xfs_mount_t *mp, xfs_sb_t *sbp)
mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG;
mp->m_blockwmask = mp->m_blockwsize - 1;
- /*
- * Setup for attributes, in case they get created.
- * This value is for inodes getting attributes for the first time,
- * the per-inode value is for old attribute values.
- */
- ASSERT(sbp->sb_inodesize >= 256 && sbp->sb_inodesize <= 2048);
- switch (sbp->sb_inodesize) {
- case 256:
- mp->m_attroffset = XFS_LITINO(mp) -
- XFS_BMDR_SPACE_CALC(MINABTPTRS);
- break;
- case 512:
- case 1024:
- case 2048:
- mp->m_attroffset = XFS_BMDR_SPACE_CALC(6 * MINABTPTRS);
- break;
- default:
- ASSERT(0);
- }
- ASSERT(mp->m_attroffset < XFS_LITINO(mp));
-
mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 1);
mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 0);
mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2;
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 5dbc6f72d988..7af44adffc8f 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -276,7 +276,6 @@ typedef struct xfs_mount {
int m_fixedfsid[2]; /* unchanged for life of FS */
uint m_dmevmask; /* DMI events for this FS */
__uint64_t m_flags; /* global mount flags */
- uint m_attroffset; /* inode attribute offset */
uint m_dir_node_ents; /* #entries in a dir danode */
uint m_attr_node_ents; /* #entries in attr danode */
int m_ialloc_inos; /* inodes in inode allocation */