[PATCH 23/46] xfs: devirtualize ->sf_get_ftype and ->sf_put_ftype

Christoph Hellwig
2019-11-07T18:25:16Z

Replace the ->sf_get_ftype and ->sf_put_ftype dir ops methods with
directly called xfs_dir2_sf_get_ftype and xfs_dir2_sf_put_ftype helpers
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 | 52 -----------------------------
fs/xfs/libxfs/xfs_dir2.h | 4 ---
fs/xfs/libxfs/xfs_dir2_block.c | 2 +-
fs/xfs/libxfs/xfs_dir2_priv.h | 2 ++
fs/xfs/libxfs/xfs_dir2_sf.c | 60 ++++++++++++++++++++++++++--------
fs/xfs/xfs_dir2_readdir.c | 2 +-
6 files changed, 50 insertions(+), 72 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_da_format.c b/fs/xfs/libxfs/xfs_da_format.c
index f427f141d001..1c72b46344d6 100644
--- a/fs/xfs/libxfs/xfs_da_format.c
+++ b/fs/xfs/libxfs/xfs_da_format.c
@@ -15,49 +15,6 @@
#include "xfs_dir2.h"
#include "xfs_dir2_priv.h"

-/*
- * For filetype enabled shortform directories, the file type field is stored at
- * the end of the name. Because it's only a single byte, endian conversion is
- * not necessary. For non-filetype enable directories, the type is always
- * unknown and we never store the value.
- */
-static uint8_t
-xfs_dir2_sfe_get_ftype(
- struct xfs_dir2_sf_entry *sfep)
-{
- return XFS_DIR3_FT_UNKNOWN;
-}
-
-static void
-xfs_dir2_sfe_put_ftype(
- struct xfs_dir2_sf_entry *sfep,
- uint8_t ftype)
-{
- ASSERT(ftype < XFS_DIR3_FT_MAX);
-}
-
-static uint8_t
-xfs_dir3_sfe_get_ftype(
- struct xfs_dir2_sf_entry *sfep)
-{
- uint8_t ftype;
-
- ftype = sfep->name[sfep->namelen];
- if (ftype >= XFS_DIR3_FT_MAX)
- return XFS_DIR3_FT_UNKNOWN;
- return ftype;
-}
-
-static void
-xfs_dir3_sfe_put_ftype(
- struct xfs_dir2_sf_entry *sfep,
- uint8_t ftype)
-{
- ASSERT(ftype < XFS_DIR3_FT_MAX);
-
- sfep->name[sfep->namelen] = ftype;
-}
-
/*
* Directory data block operations
*/
@@ -271,9 +228,6 @@ xfs_dir3_data_unused_p(struct xfs_dir2_data_hdr *hdr)
}

static const struct xfs_dir_ops xfs_dir2_ops = {
- .sf_get_ftype = xfs_dir2_sfe_get_ftype,
- .sf_put_ftype = xfs_dir2_sfe_put_ftype,
-
.data_entsize = xfs_dir2_data_entsize,
.data_get_ftype = xfs_dir2_data_get_ftype,
.data_put_ftype = xfs_dir2_data_put_ftype,
@@ -296,9 +250,6 @@ static const struct xfs_dir_ops xfs_dir2_ops = {
};

static const struct xfs_dir_ops xfs_dir2_ftype_ops = {
- .sf_get_ftype = xfs_dir3_sfe_get_ftype,
- .sf_put_ftype = xfs_dir3_sfe_put_ftype,
-
.data_entsize = xfs_dir3_data_entsize,
.data_get_ftype = xfs_dir3_data_get_ftype,
.data_put_ftype = xfs_dir3_data_put_ftype,
@@ -321,9 +272,6 @@ static const struct xfs_dir_ops xfs_dir2_ftype_ops = {
};

static const struct xfs_dir_ops xfs_dir3_ops = {
- .sf_get_ftype = xfs_dir3_sfe_get_ftype,
- .sf_put_ftype = xfs_dir3_sfe_put_ftype,
-
.data_entsize = xfs_dir3_data_entsize,
.data_get_ftype = xfs_dir3_data_get_ftype,
.data_put_ftype = xfs_dir3_data_put_ftype,
diff --git a/fs/xfs/libxfs/xfs_dir2.h b/fs/xfs/libxfs/xfs_dir2.h
index 049d844d6a18..61cc9ae837d5 100644
--- a/fs/xfs/libxfs/xfs_dir2.h
+++ b/fs/xfs/libxfs/xfs_dir2.h
@@ -32,10 +32,6 @@ extern unsigned char xfs_mode_to_ftype(int mode);
* directory operations vector for encode/decode routines
*/
struct xfs_dir_ops {
- uint8_t (*sf_get_ftype)(struct xfs_dir2_sf_entry *sfep);
- void (*sf_put_ftype)(struct xfs_dir2_sf_entry *sfep,
- uint8_t ftype);
-
int (*data_entsize)(int len);
uint8_t (*data_get_ftype)(struct xfs_dir2_data_entry *dep);
void (*data_put_ftype)(struct xfs_dir2_data_entry *dep,
diff --git a/fs/xfs/libxfs/xfs_dir2_block.c b/fs/xfs/libxfs/xfs_dir2_block.c
index 02b0344508e0..6bc82a02b228 100644
--- a/fs/xfs/libxfs/xfs_dir2_block.c
+++ b/fs/xfs/libxfs/xfs_dir2_block.c
@@ -1210,7 +1210,7 @@ xfs_dir2_sf_to_block(
dep = (xfs_dir2_data_entry_t *)((char *)hdr + newoffset);
dep->inumber = cpu_to_be64(xfs_dir2_sf_get_ino(mp, sfp, sfep));
dep->namelen = sfep->namelen;
- dp->d_ops->data_put_ftype(dep, dp->d_ops->sf_get_ftype(sfep));
+ 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 = cpu_to_be16((char *)dep - (char *)hdr);
diff --git a/fs/xfs/libxfs/xfs_dir2_priv.h b/fs/xfs/libxfs/xfs_dir2_priv.h
index a194a7b57277..b49f745f1bc3 100644
--- a/fs/xfs/libxfs/xfs_dir2_priv.h
+++ b/fs/xfs/libxfs/xfs_dir2_priv.h
@@ -149,6 +149,8 @@ xfs_ino_t xfs_dir2_sf_get_ino(struct xfs_mount *mp, struct xfs_dir2_sf_hdr *hdr,
struct xfs_dir2_sf_entry *sfep);
xfs_ino_t xfs_dir2_sf_get_parent_ino(struct xfs_dir2_sf_hdr *hdr);
void xfs_dir2_sf_put_parent_ino(struct xfs_dir2_sf_hdr *hdr, xfs_ino_t ino);
+uint8_t xfs_dir2_sf_get_ftype(struct xfs_mount *mp,
+ struct xfs_dir2_sf_entry *sfep);
struct xfs_dir2_sf_entry *xfs_dir2_sf_nextentry(struct xfs_mount *mp,
struct xfs_dir2_sf_hdr *hdr, struct xfs_dir2_sf_entry *sfep);
extern int xfs_dir2_block_sfsize(struct xfs_inode *dp,
diff --git a/fs/xfs/libxfs/xfs_dir2_sf.c b/fs/xfs/libxfs/xfs_dir2_sf.c
index f63fb044bd15..39a537c61b04 100644
--- a/fs/xfs/libxfs/xfs_dir2_sf.c
+++ b/fs/xfs/libxfs/xfs_dir2_sf.c
@@ -126,6 +126,37 @@ xfs_dir2_sf_put_parent_ino(
put_unaligned_be32(ino, hdr->parent);
}

+/*
+ * The file type field is stored at the end of the name for filetype enabled
+ * shortform directories, or not at all otherwise.
+ */
+uint8_t
+xfs_dir2_sf_get_ftype(
+ struct xfs_mount *mp,
+ struct xfs_dir2_sf_entry *sfep)
+{
+ if (xfs_sb_version_hasftype(&mp->m_sb)) {
+ uint8_t ftype = sfep->name[sfep->namelen];
+
+ if (ftype < XFS_DIR3_FT_MAX)
+ return ftype;
+ }
+
+ return XFS_DIR3_FT_UNKNOWN;
+}
+
+static void
+xfs_dir2_sf_put_ftype(
+ struct xfs_mount *mp,
+ struct xfs_dir2_sf_entry *sfep,
+ uint8_t ftype)
+{
+ ASSERT(ftype < XFS_DIR3_FT_MAX);
+
+ if (xfs_sb_version_hasftype(&mp->m_sb))
+ sfep->name[sfep->namelen] = ftype;
+}
+
/*
* Given a block directory (dp/block), calculate its size as a shortform (sf)
* directory and a header for the sf directory, if it will fit it the
@@ -305,7 +336,7 @@ xfs_dir2_block_to_sf(
memcpy(sfep->name, dep->name, dep->namelen);
xfs_dir2_sf_put_ino(mp, sfp, sfep,
be64_to_cpu(dep->inumber));
- dp->d_ops->sf_put_ftype(sfep,
+ xfs_dir2_sf_put_ftype(mp, sfep,
dp->d_ops->data_get_ftype(dep));

sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep);
@@ -471,7 +502,7 @@ xfs_dir2_sf_addname_easy(
xfs_dir2_sf_put_offset(sfep, offset);
memcpy(sfep->name, args->name, sfep->namelen);
xfs_dir2_sf_put_ino(mp, sfp, sfep, args->inumber);
- dp->d_ops->sf_put_ftype(sfep, args->filetype);
+ xfs_dir2_sf_put_ftype(mp, sfep, args->filetype);

/*
* Update the header and inode.
@@ -561,7 +592,7 @@ xfs_dir2_sf_addname_hard(
xfs_dir2_sf_put_offset(sfep, offset);
memcpy(sfep->name, args->name, sfep->namelen);
xfs_dir2_sf_put_ino(mp, sfp, sfep, args->inumber);
- dp->d_ops->sf_put_ftype(sfep, args->filetype);
+ xfs_dir2_sf_put_ftype(mp, sfep, args->filetype);
sfp->count++;
if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange)
sfp->i8count++;
@@ -658,7 +689,8 @@ static void
xfs_dir2_sf_check(
xfs_da_args_t *args) /* operation arguments */
{
- xfs_inode_t *dp; /* incore directory inode */
+ struct xfs_inode *dp = args->dp;
+ struct xfs_mount *mp = dp->i_mount;
int i; /* entry number */
int i8count; /* number of big inode#s */
xfs_ino_t ino; /* entry inode number */
@@ -666,8 +698,6 @@ xfs_dir2_sf_check(
xfs_dir2_sf_entry_t *sfep; /* shortform dir entry */
xfs_dir2_sf_hdr_t *sfp; /* shortform structure */

- dp = args->dp;
-
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
offset = dp->d_ops->data_first_offset;
ino = xfs_dir2_sf_get_parent_ino(sfp);
@@ -675,14 +705,14 @@ xfs_dir2_sf_check(

for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
i < sfp->count;
- i++, sfep = xfs_dir2_sf_nextentry(dp->i_mount, sfp, sfep)) {
+ i++, sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep)) {
ASSERT(xfs_dir2_sf_get_offset(sfep) >= offset);
- ino = xfs_dir2_sf_get_ino(dp->i_mount, sfp, sfep);
+ ino = xfs_dir2_sf_get_ino(mp, sfp, sfep);
i8count += ino > XFS_DIR2_MAX_SHORT_INUM;
offset =
xfs_dir2_sf_get_offset(sfep) +
dp->d_ops->data_entsize(sfep->namelen);
- ASSERT(dp->d_ops->sf_get_ftype(sfep) < XFS_DIR3_FT_MAX);
+ ASSERT(xfs_dir2_sf_get_ftype(mp, sfep) < XFS_DIR3_FT_MAX);
}
ASSERT(i8count == sfp->i8count);
ASSERT((char *)sfep - (char *)sfp == dp->i_d.di_size);
@@ -776,7 +806,7 @@ xfs_dir2_sf_verify(
return __this_address;

/* Check the file type. */
- filetype = dops->sf_get_ftype(sfep);
+ filetype = xfs_dir2_sf_get_ftype(mp, sfep);
if (filetype >= XFS_DIR3_FT_MAX)
return __this_address;

@@ -913,7 +943,7 @@ xfs_dir2_sf_lookup(
if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) {
args->cmpresult = cmp;
args->inumber = xfs_dir2_sf_get_ino(mp, sfp, sfep);
- args->filetype = dp->d_ops->sf_get_ftype(sfep);
+ args->filetype = xfs_dir2_sf_get_ftype(mp, sfep);
if (cmp == XFS_CMP_EXACT)
return -EEXIST;
ci_sfep = sfep;
@@ -1084,7 +1114,7 @@ xfs_dir2_sf_replace(
ASSERT(args->inumber != ino);
xfs_dir2_sf_put_ino(mp, sfp, sfep,
args->inumber);
- dp->d_ops->sf_put_ftype(sfep, args->filetype);
+ xfs_dir2_sf_put_ftype(mp, sfep, args->filetype);
break;
}
}
@@ -1190,7 +1220,8 @@ xfs_dir2_sf_toino4(
memcpy(sfep->name, oldsfep->name, sfep->namelen);
xfs_dir2_sf_put_ino(mp, sfp, sfep,
xfs_dir2_sf_get_ino(mp, oldsfp, oldsfep));
- dp->d_ops->sf_put_ftype(sfep, dp->d_ops->sf_get_ftype(oldsfep));
+ xfs_dir2_sf_put_ftype(mp, sfep,
+ xfs_dir2_sf_get_ftype(mp, oldsfep));
}
/*
* Clean up the inode.
@@ -1262,7 +1293,8 @@ xfs_dir2_sf_toino8(
memcpy(sfep->name, oldsfep->name, sfep->namelen);
xfs_dir2_sf_put_ino(mp, sfp, sfep,
xfs_dir2_sf_get_ino(mp, oldsfp, oldsfep));
- dp->d_ops->sf_put_ftype(sfep, dp->d_ops->sf_get_ftype(oldsfep));
+ xfs_dir2_sf_put_ftype(mp, sfep,
+ xfs_dir2_sf_get_ftype(mp, oldsfep));
}
/*
* Clean up the inode.
diff --git a/fs/xfs/xfs_dir2_readdir.c b/fs/xfs/xfs_dir2_readdir.c
index 9d318f091a73..e18045465455 100644
--- a/fs/xfs/xfs_dir2_readdir.c
+++ b/fs/xfs/xfs_dir2_readdir.c
@@ -115,7 +115,7 @@ xfs_dir2_sf_getdents(
}

ino = xfs_dir2_sf_get_ino(mp, sfp, sfep);
- filetype = dp->d_ops->sf_get_ftype(sfep);
+ filetype = xfs_dir2_sf_get_ftype(mp, sfep);
ctx->pos = off & 0x7fffffff;
if (!xfs_dir2_namecheck(sfep->name, sfep->namelen)) {
XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW,
--
2.20.1