[PATCH 42/46] xfs: devirtualize ->data_bestfree_p

Christoph Hellwig
2019-11-07T18:26:04Z

Replace the ->data_bestfree_p dir ops method with a directly called
xfs_dir2_data_bestfree_p helper that takes care of the differences
between the v4 and v5 on-disk format.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
---
fs/xfs/libxfs/xfs_da_format.c | 15 ---------------
fs/xfs/libxfs/xfs_dir2.h | 3 ---
fs/xfs/libxfs/xfs_dir2_block.c | 6 +++---
fs/xfs/libxfs/xfs_dir2_data.c | 23 ++++++++++++++++-------
fs/xfs/libxfs/xfs_dir2_leaf.c | 11 ++++++-----
fs/xfs/libxfs/xfs_dir2_node.c | 6 +++---
fs/xfs/libxfs/xfs_dir2_priv.h | 2 ++
fs/xfs/scrub/dir.c | 7 ++-----
8 files changed, 32 insertions(+), 41 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_da_format.c b/fs/xfs/libxfs/xfs_da_format.c
index dd2389748672..b9f9fbf7eee2 100644
--- a/fs/xfs/libxfs/xfs_da_format.c
+++ b/fs/xfs/libxfs/xfs_da_format.c
@@ -56,34 +56,19 @@ xfs_dir3_data_put_ftype(
dep->name[dep->namelen] = type;
}

-static struct xfs_dir2_data_free *
-xfs_dir2_data_bestfree_p(struct xfs_dir2_data_hdr *hdr)
-{
- return hdr->bestfree;
-}
-
-static struct xfs_dir2_data_free *
-xfs_dir3_data_bestfree_p(struct xfs_dir2_data_hdr *hdr)
-{
- return ((struct xfs_dir3_data_hdr *)hdr)->best_free;
-}
-
static const struct xfs_dir_ops xfs_dir2_ops = {
.data_get_ftype = xfs_dir2_data_get_ftype,
.data_put_ftype = xfs_dir2_data_put_ftype,
- .data_bestfree_p = xfs_dir2_data_bestfree_p,
};

static const struct xfs_dir_ops xfs_dir2_ftype_ops = {
.data_get_ftype = xfs_dir3_data_get_ftype,
.data_put_ftype = xfs_dir3_data_put_ftype,
- .data_bestfree_p = xfs_dir2_data_bestfree_p,
};

static const struct xfs_dir_ops xfs_dir3_ops = {
.data_get_ftype = xfs_dir3_data_get_ftype,
.data_put_ftype = xfs_dir3_data_put_ftype,
- .data_bestfree_p = xfs_dir3_data_bestfree_p,
};

/*
diff --git a/fs/xfs/libxfs/xfs_dir2.h b/fs/xfs/libxfs/xfs_dir2.h
index 830c70a20761..b50273b2d970 100644
--- a/fs/xfs/libxfs/xfs_dir2.h
+++ b/fs/xfs/libxfs/xfs_dir2.h
@@ -35,8 +35,6 @@ struct xfs_dir_ops {
uint8_t (*data_get_ftype)(struct xfs_dir2_data_entry *dep);
void (*data_put_ftype)(struct xfs_dir2_data_entry *dep,
uint8_t ftype);
- struct xfs_dir2_data_free *
- (*data_bestfree_p)(struct xfs_dir2_data_hdr *hdr);
};

extern const struct xfs_dir_ops *
@@ -81,7 +79,6 @@ extern int xfs_dir2_shrink_inode(struct xfs_da_args *args, xfs_dir2_db_t db,
struct xfs_buf *bp);

extern void xfs_dir2_data_freescan_int(struct xfs_mount *mp,
- const struct xfs_dir_ops *ops,
struct xfs_dir2_data_hdr *hdr, int *loghead);
extern void xfs_dir2_data_freescan(struct xfs_inode *dp,
struct xfs_dir2_data_hdr *hdr, int *loghead);
diff --git a/fs/xfs/libxfs/xfs_dir2_block.c b/fs/xfs/libxfs/xfs_dir2_block.c
index 9529a000838f..62b3adb01210 100644
--- a/fs/xfs/libxfs/xfs_dir2_block.c
+++ b/fs/xfs/libxfs/xfs_dir2_block.c
@@ -172,7 +172,7 @@ xfs_dir2_block_need_space(
struct xfs_dir2_data_unused *enddup = NULL;

*compact = 0;
- bf = dp->d_ops->data_bestfree_p(hdr);
+ bf = xfs_dir2_data_bestfree_p(dp->i_mount, hdr);

/*
* If there are stale entries we'll use one for the leaf.
@@ -1199,8 +1199,8 @@ xfs_dir2_sf_to_block(
*xfs_dir2_data_unused_tag_p(dup) = cpu_to_be16(offset);
xfs_dir2_data_log_unused(args, bp, dup);
xfs_dir2_data_freeinsert(hdr,
- dp->d_ops->data_bestfree_p(hdr),
- dup, &dummy);
+ xfs_dir2_data_bestfree_p(mp, hdr),
+ dup, &dummy);
offset += be16_to_cpu(dup->length);
continue;
}
diff --git a/fs/xfs/libxfs/xfs_dir2_data.c b/fs/xfs/libxfs/xfs_dir2_data.c
index c1a843f6a8da..6ed9396225e3 100644
--- a/fs/xfs/libxfs/xfs_dir2_data.c
+++ b/fs/xfs/libxfs/xfs_dir2_data.c
@@ -25,6 +25,16 @@ static xfs_failaddr_t xfs_dir2_data_freefind_verify(
struct xfs_dir2_data_unused *dup,
struct xfs_dir2_data_free **bf_ent);

+struct xfs_dir2_data_free *
+xfs_dir2_data_bestfree_p(
+ struct xfs_mount *mp,
+ struct xfs_dir2_data_hdr *hdr)
+{
+ if (xfs_sb_version_hascrc(&mp->m_sb))
+ return ((struct xfs_dir3_data_hdr *)hdr)->best_free;
+ return hdr->bestfree;
+}
+
/*
* Pointer to an entry's tag word.
*/
@@ -121,7 +131,7 @@ __xfs_dir3_data_check(
/*
* Account for zero bestfree entries.
*/
- bf = ops->data_bestfree_p(hdr);
+ bf = xfs_dir2_data_bestfree_p(mp, hdr);
count = lastfree = freeseen = 0;
if (!bf[0].length) {
if (bf[0].offset)
@@ -581,12 +591,11 @@ xfs_dir2_data_freeremove(
void
xfs_dir2_data_freescan_int(
struct xfs_mount *mp,
- const struct xfs_dir_ops *ops,
struct xfs_dir2_data_hdr *hdr,
int *loghead)
{
struct xfs_da_geometry *geo = mp->m_dir_geo;
- struct xfs_dir2_data_free *bf = ops->data_bestfree_p(hdr);
+ struct xfs_dir2_data_free *bf = xfs_dir2_data_bestfree_p(mp, hdr);
void *addr = hdr;
unsigned int offset = geo->data_entry_offset;
unsigned int end;
@@ -633,7 +642,7 @@ xfs_dir2_data_freescan(
struct xfs_dir2_data_hdr *hdr,
int *loghead)
{
- return xfs_dir2_data_freescan_int(dp->i_mount, dp->d_ops, hdr, loghead);
+ return xfs_dir2_data_freescan_int(dp->i_mount, hdr, loghead);
}

/*
@@ -683,7 +692,7 @@ xfs_dir3_data_init(
} else
hdr->magic = cpu_to_be32(XFS_DIR2_DATA_MAGIC);

- bf = dp->d_ops->data_bestfree_p(hdr);
+ bf = xfs_dir2_data_bestfree_p(mp, hdr);
bf[0].offset = cpu_to_be16(geo->data_entry_offset);
bf[0].length = cpu_to_be16(geo->blksize - geo->data_entry_offset);
for (i = 1; i < XFS_DIR2_DATA_FD_COUNT; i++) {
@@ -841,7 +850,7 @@ xfs_dir2_data_make_free(
* Previous and following entries are both free,
* merge everything into a single free entry.
*/
- bf = args->dp->d_ops->data_bestfree_p(hdr);
+ bf = xfs_dir2_data_bestfree_p(args->dp->i_mount, hdr);
if (prevdup && postdup) {
xfs_dir2_data_free_t *dfp2; /* another bestfree pointer */

@@ -1032,7 +1041,7 @@ xfs_dir2_data_use_free(
* Look up the entry in the bestfree table.
*/
oldlen = be16_to_cpu(dup->length);
- bf = args->dp->d_ops->data_bestfree_p(hdr);
+ bf = xfs_dir2_data_bestfree_p(args->dp->i_mount, hdr);
dfp = xfs_dir2_data_freefind(hdr, bf, dup);
ASSERT(dfp || oldlen <= be16_to_cpu(bf[2].length));
/*
diff --git a/fs/xfs/libxfs/xfs_dir2_leaf.c b/fs/xfs/libxfs/xfs_dir2_leaf.c
index 2b327d1937f4..7fa485cd0158 100644
--- a/fs/xfs/libxfs/xfs_dir2_leaf.c
+++ b/fs/xfs/libxfs/xfs_dir2_leaf.c
@@ -425,7 +425,7 @@ xfs_dir2_block_to_leaf(
xfs_dir3_data_check(dp, dbp);
btp = xfs_dir2_block_tail_p(args->geo, hdr);
blp = xfs_dir2_block_leaf_p(btp);
- bf = dp->d_ops->data_bestfree_p(hdr);
+ bf = xfs_dir2_data_bestfree_p(dp->i_mount, hdr);

/*
* Set the counts in the leaf header.
@@ -823,7 +823,7 @@ xfs_dir2_leaf_addname(
else
xfs_dir3_leaf_log_bests(args, lbp, use_block, use_block);
hdr = dbp->b_addr;
- bf = dp->d_ops->data_bestfree_p(hdr);
+ bf = xfs_dir2_data_bestfree_p(dp->i_mount, hdr);
bestsp[use_block] = bf[0].length;
grown = 1;
} else {
@@ -839,7 +839,7 @@ xfs_dir2_leaf_addname(
return error;
}
hdr = dbp->b_addr;
- bf = dp->d_ops->data_bestfree_p(hdr);
+ bf = xfs_dir2_data_bestfree_p(dp->i_mount, hdr);
grown = 0;
}
/*
@@ -1376,7 +1376,7 @@ xfs_dir2_leaf_removename(
leaf = lbp->b_addr;
hdr = dbp->b_addr;
xfs_dir3_data_check(dp, dbp);
- bf = dp->d_ops->data_bestfree_p(hdr);
+ bf = xfs_dir2_data_bestfree_p(dp->i_mount, hdr);

/*
* Point to the leaf entry, use that to point to the data entry.
@@ -1620,7 +1620,8 @@ xfs_dir2_leaf_trim_data(
#ifdef DEBUG
{
struct xfs_dir2_data_hdr *hdr = dbp->b_addr;
- struct xfs_dir2_data_free *bf = dp->d_ops->data_bestfree_p(hdr);
+ struct xfs_dir2_data_free *bf =
+ xfs_dir2_data_bestfree_p(dp->i_mount, hdr);

ASSERT(hdr->magic == cpu_to_be32(XFS_DIR2_DATA_MAGIC) ||
hdr->magic == cpu_to_be32(XFS_DIR3_DATA_MAGIC));
diff --git a/fs/xfs/libxfs/xfs_dir2_node.c b/fs/xfs/libxfs/xfs_dir2_node.c
index 8c7af28cea80..c97217e57a27 100644
--- a/fs/xfs/libxfs/xfs_dir2_node.c
+++ b/fs/xfs/libxfs/xfs_dir2_node.c
@@ -1317,7 +1317,7 @@ xfs_dir2_leafn_remove(
dbp = dblk->bp;
hdr = dbp->b_addr;
dep = (xfs_dir2_data_entry_t *)((char *)hdr + off);
- bf = dp->d_ops->data_bestfree_p(hdr);
+ bf = xfs_dir2_data_bestfree_p(dp->i_mount, hdr);
longest = be16_to_cpu(bf[0].length);
needlog = needscan = 0;
xfs_dir2_data_make_free(args, dbp, off,
@@ -1775,7 +1775,7 @@ xfs_dir2_node_add_datablk(
}

/* Update the freespace value for the new block in the table. */
- bf = dp->d_ops->data_bestfree_p(dbp->b_addr);
+ bf = xfs_dir2_data_bestfree_p(mp, dbp->b_addr);
hdr->bests[*findex] = bf[0].length;

*dbpp = dbp;
@@ -1948,7 +1948,7 @@ xfs_dir2_node_addname_int(

/* setup for data block up now */
hdr = dbp->b_addr;
- bf = dp->d_ops->data_bestfree_p(hdr);
+ bf = xfs_dir2_data_bestfree_p(dp->i_mount, hdr);
ASSERT(be16_to_cpu(bf[0].length) >= length);

/* Point to the existing unused space. */
diff --git a/fs/xfs/libxfs/xfs_dir2_priv.h b/fs/xfs/libxfs/xfs_dir2_priv.h
index 54bbfdd6ad69..99cdc31eb8c9 100644
--- a/fs/xfs/libxfs/xfs_dir2_priv.h
+++ b/fs/xfs/libxfs/xfs_dir2_priv.h
@@ -57,6 +57,8 @@ extern int xfs_dir2_leaf_to_block(struct xfs_da_args *args,
struct xfs_buf *lbp, struct xfs_buf *dbp);

/* xfs_dir2_data.c */
+struct xfs_dir2_data_free *xfs_dir2_data_bestfree_p(struct xfs_mount *mp,
+ struct xfs_dir2_data_hdr *hdr);
__be16 *xfs_dir2_data_entry_tag_p(struct xfs_mount *mp,
struct xfs_dir2_data_entry *dep);

diff --git a/fs/xfs/scrub/dir.c b/fs/xfs/scrub/dir.c
index 5e8599d0613c..f53ee6a9078a 100644
--- a/fs/xfs/scrub/dir.c
+++ b/fs/xfs/scrub/dir.c
@@ -327,7 +327,6 @@ xchk_directory_data_bestfree(
struct xfs_buf *bp;
struct xfs_dir2_data_free *bf;
struct xfs_mount *mp = sc->mp;
- const struct xfs_dir_ops *d_ops;
u16 tag;
unsigned int nr_bestfrees = 0;
unsigned int nr_frees = 0;
@@ -337,8 +336,6 @@ xchk_directory_data_bestfree(
unsigned int end;
int error;

- d_ops = sc->ip->d_ops;
-
if (is_block) {
/* dir block format */
if (lblk != XFS_B_TO_FSBT(mp, XFS_DIR2_DATA_OFFSET))
@@ -358,7 +355,7 @@ xchk_directory_data_bestfree(
goto out_buf;

/* Do the bestfrees correspond to actual free space? */
- bf = d_ops->data_bestfree_p(bp->b_addr);
+ bf = xfs_dir2_data_bestfree_p(mp, bp->b_addr);
smallest_bestfree = UINT_MAX;
for (dfp = &bf[0]; dfp < &bf[XFS_DIR2_DATA_FD_COUNT]; dfp++) {
offset = be16_to_cpu(dfp->offset);
@@ -465,7 +462,7 @@ xchk_directory_check_freesp(
{
struct xfs_dir2_data_free *dfp;

- dfp = sc->ip->d_ops->data_bestfree_p(dbp->b_addr);
+ dfp = xfs_dir2_data_bestfree_p(sc->mp, dbp->b_addr);

if (len != be16_to_cpu(dfp->length))
xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, lblk);
--
2.20.1