[PATCH 39/46] xfs: devirtualize ->data_entry_tag_p

Christoph Hellwig
2019-11-07T18:25:56Z

Replace the ->data_entry_tag_p dir ops method with a directly called
xfs_dir2_data_entry_tag_p helper that takes care of the differences
between the directory format with and without the file type field.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
---
fs/xfs/libxfs/xfs_da_format.c | 22 ----------------------
fs/xfs/libxfs/xfs_dir2.h | 1 -
fs/xfs/libxfs/xfs_dir2_block.c | 8 ++++----
fs/xfs/libxfs/xfs_dir2_data.c | 21 ++++++++++++++++++---
fs/xfs/libxfs/xfs_dir2_leaf.c | 2 +-
fs/xfs/libxfs/xfs_dir2_node.c | 2 +-
fs/xfs/libxfs/xfs_dir2_priv.h | 2 ++
fs/xfs/scrub/dir.c | 2 +-
8 files changed, 27 insertions(+), 33 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_da_format.c b/fs/xfs/libxfs/xfs_da_format.c
index e4498bd0d6c0..483f4ab6abb8 100644
--- a/fs/xfs/libxfs/xfs_da_format.c
+++ b/fs/xfs/libxfs/xfs_da_format.c
@@ -89,25 +89,6 @@ xfs_dir3_data_put_ftype(
dep->name[dep->namelen] = type;
}

-/*
- * Pointer to an entry's tag word.
- */
-static __be16 *
-xfs_dir2_data_entry_tag_p(
- struct xfs_dir2_data_entry *dep)
-{
- return (__be16 *)((char *)dep +
- XFS_DIR2_DATA_ENTSIZE(dep->namelen) - sizeof(__be16));
-}
-
-static __be16 *
-xfs_dir3_data_entry_tag_p(
- struct xfs_dir2_data_entry *dep)
-{
- return (__be16 *)((char *)dep +
- XFS_DIR3_DATA_ENTSIZE(dep->namelen) - sizeof(__be16));
-}
-
static struct xfs_dir2_data_free *
xfs_dir2_data_bestfree_p(struct xfs_dir2_data_hdr *hdr)
{
@@ -123,7 +104,6 @@ xfs_dir3_data_bestfree_p(struct xfs_dir2_data_hdr *hdr)
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_entry_tag_p = xfs_dir2_data_entry_tag_p,
.data_bestfree_p = xfs_dir2_data_bestfree_p,

.data_first_offset = sizeof(struct xfs_dir2_data_hdr) +
@@ -135,7 +115,6 @@ static const struct xfs_dir_ops xfs_dir2_ops = {
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_entry_tag_p = xfs_dir3_data_entry_tag_p,
.data_bestfree_p = xfs_dir2_data_bestfree_p,

.data_first_offset = sizeof(struct xfs_dir2_data_hdr) +
@@ -147,7 +126,6 @@ static const struct xfs_dir_ops xfs_dir2_ftype_ops = {
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_entry_tag_p = xfs_dir3_data_entry_tag_p,
.data_bestfree_p = xfs_dir3_data_bestfree_p,

.data_first_offset = sizeof(struct xfs_dir3_data_hdr) +
diff --git a/fs/xfs/libxfs/xfs_dir2.h b/fs/xfs/libxfs/xfs_dir2.h
index f717b1cdb208..3f46954e9370 100644
--- a/fs/xfs/libxfs/xfs_dir2.h
+++ b/fs/xfs/libxfs/xfs_dir2.h
@@ -35,7 +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);
- __be16 * (*data_entry_tag_p)(struct xfs_dir2_data_entry *dep);
struct xfs_dir2_data_free *
(*data_bestfree_p)(struct xfs_dir2_data_hdr *hdr);

diff --git a/fs/xfs/libxfs/xfs_dir2_block.c b/fs/xfs/libxfs/xfs_dir2_block.c
index a83fcf4ac35c..35eda4d18cd8 100644
--- a/fs/xfs/libxfs/xfs_dir2_block.c
+++ b/fs/xfs/libxfs/xfs_dir2_block.c
@@ -542,7 +542,7 @@ xfs_dir2_block_addname(
dep->namelen = args->namelen;
memcpy(dep->name, args->name, args->namelen);
dp->d_ops->data_put_ftype(dep, args->filetype);
- tagp = dp->d_ops->data_entry_tag_p(dep);
+ tagp = xfs_dir2_data_entry_tag_p(dp->i_mount, dep);
*tagp = cpu_to_be16((char *)dep - (char *)hdr);
/*
* Clean up the bestfree array and log the header, tail, and entry.
@@ -1145,7 +1145,7 @@ xfs_dir2_sf_to_block(
dep->namelen = 1;
dep->name[0] = '.';
dp->d_ops->data_put_ftype(dep, XFS_DIR3_FT_DIR);
- tagp = dp->d_ops->data_entry_tag_p(dep);
+ tagp = xfs_dir2_data_entry_tag_p(mp, dep);
*tagp = cpu_to_be16(offset);
xfs_dir2_data_log_entry(args, bp, dep);
blp[0].hashval = cpu_to_be32(xfs_dir_hash_dot);
@@ -1160,7 +1160,7 @@ xfs_dir2_sf_to_block(
dep->namelen = 2;
dep->name[0] = dep->name[1] = '.';
dp->d_ops->data_put_ftype(dep, XFS_DIR3_FT_DIR);
- tagp = dp->d_ops->data_entry_tag_p(dep);
+ tagp = xfs_dir2_data_entry_tag_p(mp, dep);
*tagp = cpu_to_be16(offset);
xfs_dir2_data_log_entry(args, bp, dep);
blp[1].hashval = cpu_to_be32(xfs_dir_hash_dotdot);
@@ -1211,7 +1211,7 @@ xfs_dir2_sf_to_block(
dep->namelen = sfep->namelen;
dp->d_ops->data_put_ftype(dep, xfs_dir2_sf_get_ftype(mp, sfep));
memcpy(dep->name, sfep->name, dep->namelen);
- tagp = dp->d_ops->data_entry_tag_p(dep);
+ tagp = xfs_dir2_data_entry_tag_p(mp, dep);
*tagp = cpu_to_be16(newoffset);
xfs_dir2_data_log_entry(args, bp, dep);
name.name = sfep->name;
diff --git a/fs/xfs/libxfs/xfs_dir2_data.c b/fs/xfs/libxfs/xfs_dir2_data.c
index 830dfd9edfda..3504b230ba1d 100644
--- a/fs/xfs/libxfs/xfs_dir2_data.c
+++ b/fs/xfs/libxfs/xfs_dir2_data.c
@@ -18,12 +18,25 @@
#include "xfs_trans.h"
#include "xfs_buf_item.h"
#include "xfs_log.h"
+#include "xfs_dir2_priv.h"

static xfs_failaddr_t xfs_dir2_data_freefind_verify(
struct xfs_dir2_data_hdr *hdr, struct xfs_dir2_data_free *bf,
struct xfs_dir2_data_unused *dup,
struct xfs_dir2_data_free **bf_ent);

+/*
+ * Pointer to an entry's tag word.
+ */
+__be16 *
+xfs_dir2_data_entry_tag_p(
+ struct xfs_mount *mp,
+ struct xfs_dir2_data_entry *dep)
+{
+ return (__be16 *)((char *)dep +
+ xfs_dir2_data_entsize(mp, dep->namelen) - sizeof(__be16));
+}
+
/*
* The number of leaf entries is limited by the size of the block and the amount
* of space used by the data entries. We don't know how much space is used by
@@ -182,7 +195,7 @@ __xfs_dir3_data_check(
return __this_address;
if (offset + xfs_dir2_data_entsize(mp, dep->namelen) > end)
return __this_address;
- if (be16_to_cpu(*ops->data_entry_tag_p(dep)) != offset)
+ if (be16_to_cpu(*xfs_dir2_data_entry_tag_p(mp, dep)) != offset)
return __this_address;
if (ops->data_get_ftype(dep) >= XFS_DIR3_FT_MAX)
return __this_address;
@@ -608,7 +621,8 @@ xfs_dir2_data_freescan_int(
/*
* For active entries, check their tags and skip them.
*/
- ASSERT(offset == be16_to_cpu(*ops->data_entry_tag_p(dep)));
+ ASSERT(offset ==
+ be16_to_cpu(*xfs_dir2_data_entry_tag_p(mp, dep)));
offset += xfs_dir2_data_entsize(mp, dep->namelen);
}
}
@@ -703,6 +717,7 @@ xfs_dir2_data_log_entry(
struct xfs_buf *bp,
xfs_dir2_data_entry_t *dep) /* data entry pointer */
{
+ struct xfs_mount *mp = bp->b_mount;
struct xfs_dir2_data_hdr *hdr = bp->b_addr;

ASSERT(hdr->magic == cpu_to_be32(XFS_DIR2_DATA_MAGIC) ||
@@ -711,7 +726,7 @@ xfs_dir2_data_log_entry(
hdr->magic == cpu_to_be32(XFS_DIR3_BLOCK_MAGIC));

xfs_trans_log_buf(args->trans, bp, (uint)((char *)dep - (char *)hdr),
- (uint)((char *)(args->dp->d_ops->data_entry_tag_p(dep) + 1) -
+ (uint)((char *)(xfs_dir2_data_entry_tag_p(mp, dep) + 1) -
(char *)hdr - 1));
}

diff --git a/fs/xfs/libxfs/xfs_dir2_leaf.c b/fs/xfs/libxfs/xfs_dir2_leaf.c
index dd7b4bd8ed61..4b6d590c5856 100644
--- a/fs/xfs/libxfs/xfs_dir2_leaf.c
+++ b/fs/xfs/libxfs/xfs_dir2_leaf.c
@@ -866,7 +866,7 @@ xfs_dir2_leaf_addname(
dep->namelen = args->namelen;
memcpy(dep->name, args->name, dep->namelen);
dp->d_ops->data_put_ftype(dep, args->filetype);
- tagp = dp->d_ops->data_entry_tag_p(dep);
+ tagp = xfs_dir2_data_entry_tag_p(dp->i_mount, dep);
*tagp = cpu_to_be16((char *)dep - (char *)hdr);
/*
* Need to scan fix up the bestfree table.
diff --git a/fs/xfs/libxfs/xfs_dir2_node.c b/fs/xfs/libxfs/xfs_dir2_node.c
index f07ac23a2e2f..00f3440bcd83 100644
--- a/fs/xfs/libxfs/xfs_dir2_node.c
+++ b/fs/xfs/libxfs/xfs_dir2_node.c
@@ -1972,7 +1972,7 @@ xfs_dir2_node_addname_int(
dep->namelen = args->namelen;
memcpy(dep->name, args->name, dep->namelen);
dp->d_ops->data_put_ftype(dep, args->filetype);
- tagp = dp->d_ops->data_entry_tag_p(dep);
+ tagp = xfs_dir2_data_entry_tag_p(dp->i_mount, dep);
*tagp = cpu_to_be16((char *)dep - (char *)hdr);
xfs_dir2_data_log_entry(args, dbp, dep);

diff --git a/fs/xfs/libxfs/xfs_dir2_priv.h b/fs/xfs/libxfs/xfs_dir2_priv.h
index c60b8663f754..a6c3fb3a2f7b 100644
--- a/fs/xfs/libxfs/xfs_dir2_priv.h
+++ b/fs/xfs/libxfs/xfs_dir2_priv.h
@@ -58,6 +58,8 @@ extern int xfs_dir2_leaf_to_block(struct xfs_da_args *args,

/* xfs_dir2_data.c */
int xfs_dir2_data_entsize(struct xfs_mount *mp, int n);
+__be16 *xfs_dir2_data_entry_tag_p(struct xfs_mount *mp,
+ struct xfs_dir2_data_entry *dep);

#ifdef DEBUG
extern void xfs_dir3_data_check(struct xfs_inode *dp, struct xfs_buf *bp);
diff --git a/fs/xfs/scrub/dir.c b/fs/xfs/scrub/dir.c
index 11d1429a69e4..2b9822ead835 100644
--- a/fs/xfs/scrub/dir.c
+++ b/fs/xfs/scrub/dir.c
@@ -268,7 +268,7 @@ xchk_dir_rec(
/* Retrieve the entry, sanity check it, and compare hashes. */
ino = be64_to_cpu(dent->inumber);
hash = be32_to_cpu(ent->hashval);
- tag = be16_to_cpup(dp->d_ops->data_entry_tag_p(dent));
+ tag = be16_to_cpup(xfs_dir2_data_entry_tag_p(mp, dent));
if (!xfs_verify_dir_ino(mp, ino) || tag != off)
xchk_fblock_set_corrupt(ds->sc, XFS_DATA_FORK, rec_bno);
if (dent->namelen == 0) {
--
2.20.1