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xfs: cleanup struct xfs_dir2_free

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Change the bests array to be a proper variable sized entry.  This is done
easily as no one relies on the size of the structure.  Also change
XFS_DIR2_MAX_FREE_BESTS to an inline function while we're at it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Alex Elder <aelder@sgi.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Christoph Hellwig 2011-07-13 13:43:48 +02:00
parent 5792664070
commit a00b7745c6
2 changed files with 12 additions and 10 deletions
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14
fs/xfs/xfs_dir2_format.h
View file

@ -516,13 +516,15 @@ typedef struct xfs_dir2_free_hdr {
typedef struct xfs_dir2_free {
xfs_dir2_free_hdr_t hdr; /* block header */
__be16 bests[1]; /* best free counts */
__be16 bests[]; /* best free counts */
/* unused entries are -1 */
} xfs_dir2_free_t;
#define XFS_DIR2_MAX_FREE_BESTS(mp) \
(((mp)->m_dirblksize - (uint)sizeof(struct xfs_dir2_free_hdr)) / \
(uint)sizeof(xfs_dir2_data_off_t))
static inline int xfs_dir2_free_max_bests(struct xfs_mount *mp)
{
return (mp->m_dirblksize - sizeof(struct xfs_dir2_free_hdr)) /
sizeof(xfs_dir2_data_off_t);
}
/*
* Convert data space db to the corresponding free db.
@ -530,7 +532,7 @@ typedef struct xfs_dir2_free {
static inline xfs_dir2_db_t
xfs_dir2_db_to_fdb(struct xfs_mount *mp, xfs_dir2_db_t db)
{
return XFS_DIR2_FREE_FIRSTDB(mp) + db / XFS_DIR2_MAX_FREE_BESTS(mp);
return XFS_DIR2_FREE_FIRSTDB(mp) + db / xfs_dir2_free_max_bests(mp);
}
/*
@ -539,7 +541,7 @@ xfs_dir2_db_to_fdb(struct xfs_mount *mp, xfs_dir2_db_t db)
static inline int
xfs_dir2_db_to_fdindex(struct xfs_mount *mp, xfs_dir2_db_t db)
{
return db % XFS_DIR2_MAX_FREE_BESTS(mp);
return db % xfs_dir2_free_max_bests(mp);
}
/*

8
fs/xfs/xfs_dir2_node.c
View file

@ -408,7 +408,7 @@ xfs_dir2_leafn_lookup_for_addname(
ASSERT(be32_to_cpu(free->hdr.magic) ==
XFS_DIR2_FREE_MAGIC);
ASSERT((be32_to_cpu(free->hdr.firstdb) %
XFS_DIR2_MAX_FREE_BESTS(mp)) == 0);
xfs_dir2_free_max_bests(mp)) == 0);
ASSERT(be32_to_cpu(free->hdr.firstdb) <= curdb);
ASSERT(curdb < be32_to_cpu(free->hdr.firstdb) +
be32_to_cpu(free->hdr.nvalid));
@ -924,7 +924,7 @@ xfs_dir2_leafn_remove(
free = fbp->data;
ASSERT(free->hdr.magic == cpu_to_be32(XFS_DIR2_FREE_MAGIC));
ASSERT(be32_to_cpu(free->hdr.firstdb) ==
XFS_DIR2_MAX_FREE_BESTS(mp) *
xfs_dir2_free_max_bests(mp) *
(fdb - XFS_DIR2_FREE_FIRSTDB(mp)));
/*
* Calculate which entry we need to fix.
@ -1603,7 +1603,7 @@ xfs_dir2_node_addname_int(
free->hdr.magic = cpu_to_be32(XFS_DIR2_FREE_MAGIC);
free->hdr.firstdb = cpu_to_be32(
(fbno - XFS_DIR2_FREE_FIRSTDB(mp)) *
XFS_DIR2_MAX_FREE_BESTS(mp));
xfs_dir2_free_max_bests(mp));
free->hdr.nvalid = 0;
free->hdr.nused = 0;
} else {
@ -1620,7 +1620,7 @@ xfs_dir2_node_addname_int(
* freespace block, extend that table.
*/
if (findex >= be32_to_cpu(free->hdr.nvalid)) {
ASSERT(findex < XFS_DIR2_MAX_FREE_BESTS(mp));
ASSERT(findex < xfs_dir2_free_max_bests(mp));
free->hdr.nvalid = cpu_to_be32(findex + 1);
/*
* Tag new entry so nused will go up.