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xfs: vectorise directory data operations

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Following from the initial patches to vectorise the shortform
directory encode/decode operations, convert half the data block
operations to use the vector. The rest will be done in a second
patch.

This further reduces the size of the built binary:

   text    data     bss     dec     hex filename
 794490   96802    1096  892388   d9de4 fs/xfs/xfs.o.orig
 792986   96802    1096  890884   d9804 fs/xfs/xfs.o.p1
 792350   96802    1096  890248   d9588 fs/xfs/xfs.o.p2
 789293   96802    1096  887191   d8997 fs/xfs/xfs.o.p3

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ben Myers <bpm@sgi.com>
This commit is contained in:
Dave Chinner
2013-10-29 22:11:48 +11:00
committed by Ben Myers
parent 4740175e75
commit 9d23fc8575
9 changed files with 329 additions and 205 deletions
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38
fs/xfs/xfs_dir2_data.c
View File

@@ -62,12 +62,26 @@ __xfs_dir3_data_check(
char *p; /* current data position */
int stale; /* count of stale leaves */
struct xfs_name name;
const struct xfs_dir_ops *ops;
mp = bp->b_target->bt_mount;
hdr = bp->b_addr;
bf = xfs_dir3_data_bestfree_p(hdr);
p = (char *)xfs_dir3_data_entry_p(hdr);
/*
* We can be passed a null dp here from a verifier, so manually
* configure the ops here in that case.
*/
if (dp)
ops = dp->d_ops;
else if (xfs_sb_version_hascrc(&mp->m_sb))
ops = &xfs_dir3_ops;
else if (xfs_sb_version_hasftype(&mp->m_sb))
ops = &xfs_dir2_ftype_ops;
else
ops = &xfs_dir2_ops;
switch (hdr->magic) {
case cpu_to_be32(XFS_DIR3_BLOCK_MAGIC):
case cpu_to_be32(XFS_DIR2_BLOCK_MAGIC):
@@ -146,10 +160,10 @@ __xfs_dir3_data_check(
XFS_WANT_CORRUPTED_RETURN(
!xfs_dir_ino_validate(mp, be64_to_cpu(dep->inumber)));
XFS_WANT_CORRUPTED_RETURN(
be16_to_cpu(*xfs_dir3_data_entry_tag_p(mp, dep)) ==
be16_to_cpu(*ops->data_entry_tag_p(dep)) ==
(char *)dep - (char *)hdr);
XFS_WANT_CORRUPTED_RETURN(
xfs_dir3_dirent_get_ftype(mp, dep) < XFS_DIR3_FT_MAX);
ops->data_get_ftype(dep) < XFS_DIR3_FT_MAX);
count++;
lastfree = 0;
if (hdr->magic == cpu_to_be32(XFS_DIR2_BLOCK_MAGIC) ||
@@ -167,7 +181,7 @@ __xfs_dir3_data_check(
}
XFS_WANT_CORRUPTED_RETURN(i < be32_to_cpu(btp->count));
}
p += xfs_dir3_data_entsize(mp, dep->namelen);
p += ops->data_entsize(dep->namelen);
}
/*
* Need to have seen all the entries and all the bestfree slots.
@@ -485,9 +499,9 @@ xfs_dir2_data_freeremove(
*/
void
xfs_dir2_data_freescan(
xfs_mount_t *mp, /* filesystem mount point */
xfs_dir2_data_hdr_t *hdr, /* data block header */
int *loghead) /* out: log data header */
struct xfs_inode *dp,
struct xfs_dir2_data_hdr *hdr,
int *loghead)
{
xfs_dir2_block_tail_t *btp; /* block tail */
xfs_dir2_data_entry_t *dep; /* active data entry */
@@ -513,10 +527,10 @@ xfs_dir2_data_freescan(
p = (char *)xfs_dir3_data_entry_p(hdr);
if (hdr->magic == cpu_to_be32(XFS_DIR2_BLOCK_MAGIC) ||
hdr->magic == cpu_to_be32(XFS_DIR3_BLOCK_MAGIC)) {
btp = xfs_dir2_block_tail_p(mp, hdr);
btp = xfs_dir2_block_tail_p(dp->i_mount, hdr);
endp = (char *)xfs_dir2_block_leaf_p(btp);
} else
endp = (char *)hdr + mp->m_dirblksize;
endp = (char *)hdr + dp->i_mount->m_dirblksize;
/*
* Loop over the block's entries.
*/
@@ -537,8 +551,8 @@ xfs_dir2_data_freescan(
else {
dep = (xfs_dir2_data_entry_t *)p;
ASSERT((char *)dep - (char *)hdr ==
be16_to_cpu(*xfs_dir3_data_entry_tag_p(mp, dep)));
p += xfs_dir3_data_entsize(mp, dep->namelen);
be16_to_cpu(*dp->d_ops->data_entry_tag_p(dep)));
p += dp->d_ops->data_entsize(dep->namelen);
}
}
}
@@ -625,11 +639,11 @@ xfs_dir3_data_init(
void
xfs_dir2_data_log_entry(
struct xfs_trans *tp,
struct xfs_inode *dp,
struct xfs_buf *bp,
xfs_dir2_data_entry_t *dep) /* data entry pointer */
{
struct xfs_dir2_data_hdr *hdr = bp->b_addr;
struct xfs_mount *mp = tp->t_mountp;
ASSERT(hdr->magic == cpu_to_be32(XFS_DIR2_DATA_MAGIC) ||
hdr->magic == cpu_to_be32(XFS_DIR3_DATA_MAGIC) ||
@@ -637,7 +651,7 @@ xfs_dir2_data_log_entry(
hdr->magic == cpu_to_be32(XFS_DIR3_BLOCK_MAGIC));
xfs_trans_log_buf(tp, bp, (uint)((char *)dep - (char *)hdr),
(uint)((char *)(xfs_dir3_data_entry_tag_p(mp, dep) + 1) -
(uint)((char *)(dp->d_ops->data_entry_tag_p(dep) + 1) -
(char *)hdr - 1));
}