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xfs: devirtualize ->data_entry_tag_p

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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>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Christoph Hellwig 2019-11-08 15:05:37 -08:00 committed by Darrick J. Wong
parent fdbb8c5b80
commit 7e8ae7bd1c
8 changed files with 27 additions and 33 deletions
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22
fs/xfs/libxfs/xfs_da_format.c
View file

@ -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) +

1
fs/xfs/libxfs/xfs_dir2.h
View file

@ -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);

8
fs/xfs/libxfs/xfs_dir2_block.c
View file

@ -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;

21
fs/xfs/libxfs/xfs_dir2_data.c
View file

@ -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));
}

2
fs/xfs/libxfs/xfs_dir2_leaf.c
View file

@ -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.

2
fs/xfs/libxfs/xfs_dir2_node.c
View file

@ -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);

2
fs/xfs/libxfs/xfs_dir2_priv.h
View file

@ -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);

2
fs/xfs/scrub/dir.c
View file

@ -271,7 +271,7 @@ 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) {