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[XFS] Fix attr2 corruption with btree data extents 

SGI-PV: 958747
SGI-Modid: xfs-linux-melb:xfs-kern:27792a

Signed-off-by: Barry Naujok <bnaujok@sgi.com>
Signed-off-by: Russell Cattelan <cattelan@thebarn.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
This commit is contained in:
Barry Naujok 2007-02-10 18:35:58 +11:00 committed by Tim Shimmin
parent 7666ab5fb3
commit e5889e90dd
3 changed files with 54 additions and 11 deletions
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19
fs/xfs/xfs_attr.c
View File

@ -198,19 +198,15 @@ xfs_attr_set_int(xfs_inode_t *dp, const char *name, int namelen,
if ((error = XFS_QM_DQATTACH(mp, dp, 0)))
return (error);
/*
* Determine space new attribute will use, and if it would be
* "local" or "remote" (note: local != inline).
*/
size = xfs_attr_leaf_newentsize(namelen, valuelen,
mp->m_sb.sb_blocksize, &local);
/*
* If the inode doesn't have an attribute fork, add one.
* (inode must not be locked when we call this routine)
*/
if (XFS_IFORK_Q(dp) == 0) {
if ((error = xfs_bmap_add_attrfork(dp, size, rsvd)))
int sf_size = sizeof(xfs_attr_sf_hdr_t) +
XFS_ATTR_SF_ENTSIZE_BYNAME(namelen, valuelen);
if ((error = xfs_bmap_add_attrfork(dp, sf_size, rsvd)))
return(error);
}
@ -231,6 +227,13 @@ xfs_attr_set_int(xfs_inode_t *dp, const char *name, int namelen,
args.addname = 1;
args.oknoent = 1;
/*
* Determine space new attribute will use, and if it would be
* "local" or "remote" (note: local != inline).
*/
size = xfs_attr_leaf_newentsize(namelen, valuelen,
mp->m_sb.sb_blocksize, &local);
nblks = XFS_DAENTER_SPACE_RES(mp, XFS_ATTR_FORK);
if (local) {
if (size > (mp->m_sb.sb_blocksize >> 1)) {

45
fs/xfs/xfs_attr_leaf.c
View File

@ -150,6 +150,7 @@ xfs_attr_shortform_bytesfit(xfs_inode_t *dp, int bytes)
int offset;
int minforkoff; /* lower limit on valid forkoff locations */
int maxforkoff; /* upper limit on valid forkoff locations */
int dsize;
xfs_mount_t *mp = dp->i_mount;
offset = (XFS_LITINO(mp) - bytes) >> 3; /* rounded down */
@ -169,8 +170,43 @@ xfs_attr_shortform_bytesfit(xfs_inode_t *dp, int bytes)
return 0;
}
/* data fork btree root can have at least this many key/ptr pairs */
minforkoff = MAX(dp->i_df.if_bytes, XFS_BMDR_SPACE_CALC(MINDBTPTRS));
dsize = dp->i_df.if_bytes;
switch (dp->i_d.di_format) {
case XFS_DINODE_FMT_EXTENTS:
/*
* If there is no attr fork and the data fork is extents,
* determine if creating the default attr fork will result
* in the extents form migrating to btree. If so, the
* 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)
dsize = XFS_BMDR_SPACE_CALC(MINDBTPTRS);
break;
case XFS_DINODE_FMT_BTREE:
/*
* If have data btree then keep forkoff if we have one,
* otherwise we are adding a new attr, so then we set
* minforkoff to where the btree root can finish so we have
* plenty of room for attrs
*/
if (dp->i_d.di_forkoff) {
if (offset < dp->i_d.di_forkoff)
return 0;
else
return dp->i_d.di_forkoff;
} else
dsize = XFS_BMAP_BROOT_SPACE(dp->i_df.if_broot);
break;
}
/*
* A data fork btree root must have space for at least
* MINDBTPTRS key/ptr pairs if the data fork is small or empty.
*/
minforkoff = MAX(dsize, XFS_BMDR_SPACE_CALC(MINDBTPTRS));
minforkoff = roundup(minforkoff, 8) >> 3;
/* attr fork btree root can have at least this many key/ptr pairs */
@ -336,7 +372,8 @@ xfs_attr_shortform_remove(xfs_da_args_t *args)
*/
totsize -= size;
if (totsize == sizeof(xfs_attr_sf_hdr_t) && !args->addname &&
(mp->m_flags & XFS_MOUNT_ATTR2)) {
(mp->m_flags & XFS_MOUNT_ATTR2) &&
(dp->i_d.di_format != XFS_DINODE_FMT_BTREE)) {
/*
* Last attribute now removed, revert to original
* inode format making all literal area available
@ -748,6 +785,7 @@ xfs_attr_shortform_allfit(xfs_dabuf_t *bp, xfs_inode_t *dp)
+ be16_to_cpu(name_loc->valuelen);
}
if ((dp->i_mount->m_flags & XFS_MOUNT_ATTR2) &&
(dp->i_d.di_format != XFS_DINODE_FMT_BTREE) &&
(bytes == sizeof(struct xfs_attr_sf_hdr)))
return(-1);
return(xfs_attr_shortform_bytesfit(dp, bytes));
@ -786,6 +824,7 @@ xfs_attr_leaf_to_shortform(xfs_dabuf_t *bp, xfs_da_args_t *args, int forkoff)
if (forkoff == -1) {
ASSERT(dp->i_mount->m_flags & XFS_MOUNT_ATTR2);
ASSERT(dp->i_d.di_format != XFS_DINODE_FMT_BTREE);
/*
* Last attribute was removed, revert to original

1
fs/xfs/xfs_bmap.c
View File

@ -3543,6 +3543,7 @@ xfs_bmap_forkoff_reset(
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) /