[PATCH 43/46] xfs: devirtualize ->data_get_ftype and ->data_put_ftype

Christoph Hellwig
2019-11-07T18:26:06Z

Replace the ->data_get_ftype and ->data_put_ftype dir ops methods with
directly called xfs_dir2_data_get_ftype and xfs_dir2_data_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 | 47 ----------------------------------
fs/xfs/libxfs/xfs_dir2.h | 3 ---
fs/xfs/libxfs/xfs_dir2_block.c | 13 +++++-----
fs/xfs/libxfs/xfs_dir2_data.c | 43 ++++++++++++++++++++++---------
fs/xfs/libxfs/xfs_dir2_leaf.c | 6 ++---
fs/xfs/libxfs/xfs_dir2_node.c | 6 ++---
fs/xfs/libxfs/xfs_dir2_priv.h | 4 +++
fs/xfs/libxfs/xfs_dir2_sf.c | 2 +-
fs/xfs/xfs_dir2_readdir.c | 4 +--
9 files changed, 51 insertions(+), 77 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_da_format.c b/fs/xfs/libxfs/xfs_da_format.c
index b9f9fbf7eee2..498363ac193d 100644
--- a/fs/xfs/libxfs/xfs_da_format.c
+++ b/fs/xfs/libxfs/xfs_da_format.c
@@ -15,60 +15,13 @@
#include "xfs_dir2.h"
#include "xfs_dir2_priv.h"

-/*
- * Directory data block operations
- */
-
-static uint8_t
-xfs_dir2_data_get_ftype(
- struct xfs_dir2_data_entry *dep)
-{
- return XFS_DIR3_FT_UNKNOWN;
-}
-
-static void
-xfs_dir2_data_put_ftype(
- struct xfs_dir2_data_entry *dep,
- uint8_t ftype)
-{
- ASSERT(ftype < XFS_DIR3_FT_MAX);
-}
-
-static uint8_t
-xfs_dir3_data_get_ftype(
- struct xfs_dir2_data_entry *dep)
-{
- uint8_t ftype = dep->name[dep->namelen];
-
- if (ftype >= XFS_DIR3_FT_MAX)
- return XFS_DIR3_FT_UNKNOWN;
- return ftype;
-}
-
-static void
-xfs_dir3_data_put_ftype(
- struct xfs_dir2_data_entry *dep,
- uint8_t type)
-{
- ASSERT(type < XFS_DIR3_FT_MAX);
- ASSERT(dep->namelen != 0);
-
- dep->name[dep->namelen] = type;
-}
-
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,
};

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,
};

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,
};

/*
diff --git a/fs/xfs/libxfs/xfs_dir2.h b/fs/xfs/libxfs/xfs_dir2.h
index b50273b2d970..b44c64a20f67 100644
--- a/fs/xfs/libxfs/xfs_dir2.h
+++ b/fs/xfs/libxfs/xfs_dir2.h
@@ -32,9 +32,6 @@ extern unsigned char xfs_mode_to_ftype(int mode);
* directory operations vector for encode/decode routines
*/
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);
};

extern const struct xfs_dir_ops *
diff --git a/fs/xfs/libxfs/xfs_dir2_block.c b/fs/xfs/libxfs/xfs_dir2_block.c
index 62b3adb01210..0c481e55c981 100644
--- a/fs/xfs/libxfs/xfs_dir2_block.c
+++ b/fs/xfs/libxfs/xfs_dir2_block.c
@@ -541,7 +541,7 @@ xfs_dir2_block_addname(
dep->inumber = cpu_to_be64(args->inumber);
dep->namelen = args->namelen;
memcpy(dep->name, args->name, args->namelen);
- dp->d_ops->data_put_ftype(dep, args->filetype);
+ xfs_dir2_data_put_ftype(dp->i_mount, dep, args->filetype);
tagp = xfs_dir2_data_entry_tag_p(dp->i_mount, dep);
*tagp = cpu_to_be16((char *)dep - (char *)hdr);
/*
@@ -633,7 +633,7 @@ xfs_dir2_block_lookup(
* Fill in inode number, CI name if appropriate, release the block.
*/
args->inumber = be64_to_cpu(dep->inumber);
- args->filetype = dp->d_ops->data_get_ftype(dep);
+ args->filetype = xfs_dir2_data_get_ftype(dp->i_mount, dep);
error = xfs_dir_cilookup_result(args, dep->name, dep->namelen);
xfs_trans_brelse(args->trans, bp);
return error;
@@ -865,7 +865,7 @@ xfs_dir2_block_replace(
* Change the inode number to the new value.
*/
dep->inumber = cpu_to_be64(args->inumber);
- dp->d_ops->data_put_ftype(dep, args->filetype);
+ xfs_dir2_data_put_ftype(dp->i_mount, dep, args->filetype);
xfs_dir2_data_log_entry(args, bp, dep);
xfs_dir3_data_check(dp, bp);
return 0;
@@ -1145,7 +1145,7 @@ xfs_dir2_sf_to_block(
dep->inumber = cpu_to_be64(dp->i_ino);
dep->namelen = 1;
dep->name[0] = '.';
- dp->d_ops->data_put_ftype(dep, XFS_DIR3_FT_DIR);
+ xfs_dir2_data_put_ftype(mp, dep, XFS_DIR3_FT_DIR);
tagp = xfs_dir2_data_entry_tag_p(mp, dep);
*tagp = cpu_to_be16(offset);
xfs_dir2_data_log_entry(args, bp, dep);
@@ -1160,7 +1160,7 @@ xfs_dir2_sf_to_block(
dep->inumber = cpu_to_be64(xfs_dir2_sf_get_parent_ino(sfp));
dep->namelen = 2;
dep->name[0] = dep->name[1] = '.';
- dp->d_ops->data_put_ftype(dep, XFS_DIR3_FT_DIR);
+ xfs_dir2_data_put_ftype(mp, dep, XFS_DIR3_FT_DIR);
tagp = xfs_dir2_data_entry_tag_p(mp, dep);
*tagp = cpu_to_be16(offset);
xfs_dir2_data_log_entry(args, bp, dep);
@@ -1210,7 +1210,8 @@ xfs_dir2_sf_to_block(
dep = bp->b_addr + 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, xfs_dir2_sf_get_ftype(mp, sfep));
+ xfs_dir2_data_put_ftype(mp, dep,
+ xfs_dir2_sf_get_ftype(mp, sfep));
memcpy(dep->name, sfep->name, dep->namelen);
tagp = xfs_dir2_data_entry_tag_p(mp, dep);
*tagp = cpu_to_be16(newoffset);
diff --git a/fs/xfs/libxfs/xfs_dir2_data.c b/fs/xfs/libxfs/xfs_dir2_data.c
index 6ed9396225e3..0aa1d165c964 100644
--- a/fs/xfs/libxfs/xfs_dir2_data.c
+++ b/fs/xfs/libxfs/xfs_dir2_data.c
@@ -47,6 +47,34 @@ xfs_dir2_data_entry_tag_p(
xfs_dir2_data_entsize(mp, dep->namelen) - sizeof(__be16));
}

+uint8_t
+xfs_dir2_data_get_ftype(
+ struct xfs_mount *mp,
+ struct xfs_dir2_data_entry *dep)
+{
+ if (xfs_sb_version_hasftype(&mp->m_sb)) {
+ uint8_t ftype = dep->name[dep->namelen];
+
+ if (likely(ftype < XFS_DIR3_FT_MAX))
+ return ftype;
+ }
+
+ return XFS_DIR3_FT_UNKNOWN;
+}
+
+void
+xfs_dir2_data_put_ftype(
+ struct xfs_mount *mp,
+ struct xfs_dir2_data_entry *dep,
+ uint8_t ftype)
+{
+ ASSERT(ftype < XFS_DIR3_FT_MAX);
+ ASSERT(dep->namelen != 0);
+
+ if (xfs_sb_version_hasftype(&mp->m_sb))
+ dep->name[dep->namelen] = ftype;
+}
+
/*
* 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
@@ -88,21 +116,12 @@ __xfs_dir3_data_check(
struct xfs_name name;
unsigned int offset;
unsigned int end;
- const struct xfs_dir_ops *ops;
struct xfs_da_geometry *geo = mp->m_dir_geo;

/*
- * We can be passed a null dp here from a verifier, so we need to go the
- * hard way to get them.
- */
- ops = xfs_dir_get_ops(mp, dp);
-
- /*
- * If this isn't a directory, or we don't get handed the dir ops,
- * something is seriously wrong. Bail out.
+ * If this isn't a directory, something is seriously wrong. Bail out.
*/
- if ((dp && !S_ISDIR(VFS_I(dp)->i_mode)) ||
- ops != xfs_dir_get_ops(mp, NULL))
+ if (dp && !S_ISDIR(VFS_I(dp)->i_mode))
return __this_address;

hdr = bp->b_addr;
@@ -206,7 +225,7 @@ __xfs_dir3_data_check(
return __this_address;
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)
+ if (xfs_dir2_data_get_ftype(mp, dep) >= XFS_DIR3_FT_MAX)
return __this_address;
count++;
lastfree = 0;
diff --git a/fs/xfs/libxfs/xfs_dir2_leaf.c b/fs/xfs/libxfs/xfs_dir2_leaf.c
index 7fa485cd0158..bc301c973450 100644
--- a/fs/xfs/libxfs/xfs_dir2_leaf.c
+++ b/fs/xfs/libxfs/xfs_dir2_leaf.c
@@ -865,7 +865,7 @@ xfs_dir2_leaf_addname(
dep->inumber = cpu_to_be64(args->inumber);
dep->namelen = args->namelen;
memcpy(dep->name, args->name, dep->namelen);
- dp->d_ops->data_put_ftype(dep, args->filetype);
+ xfs_dir2_data_put_ftype(dp->i_mount, dep, args->filetype);
tagp = xfs_dir2_data_entry_tag_p(dp->i_mount, dep);
*tagp = cpu_to_be16((char *)dep - (char *)hdr);
/*
@@ -1195,7 +1195,7 @@ xfs_dir2_leaf_lookup(
* Return the found inode number & CI name if appropriate
*/
args->inumber = be64_to_cpu(dep->inumber);
- args->filetype = dp->d_ops->data_get_ftype(dep);
+ args->filetype = xfs_dir2_data_get_ftype(dp->i_mount, dep);
error = xfs_dir_cilookup_result(args, dep->name, dep->namelen);
xfs_trans_brelse(tp, dbp);
xfs_trans_brelse(tp, lbp);
@@ -1526,7 +1526,7 @@ xfs_dir2_leaf_replace(
* Put the new inode number in, log it.
*/
dep->inumber = cpu_to_be64(args->inumber);
- dp->d_ops->data_put_ftype(dep, args->filetype);
+ xfs_dir2_data_put_ftype(dp->i_mount, dep, args->filetype);
tp = args->trans;
xfs_dir2_data_log_entry(args, dbp, dep);
xfs_dir3_leaf_check(dp, lbp);
diff --git a/fs/xfs/libxfs/xfs_dir2_node.c b/fs/xfs/libxfs/xfs_dir2_node.c
index c97217e57a27..5551be7c29df 100644
--- a/fs/xfs/libxfs/xfs_dir2_node.c
+++ b/fs/xfs/libxfs/xfs_dir2_node.c
@@ -884,7 +884,7 @@ xfs_dir2_leafn_lookup_for_entry(
xfs_trans_brelse(tp, state->extrablk.bp);
args->cmpresult = cmp;
args->inumber = be64_to_cpu(dep->inumber);
- args->filetype = dp->d_ops->data_get_ftype(dep);
+ args->filetype = xfs_dir2_data_get_ftype(mp, dep);
*indexp = index;
state->extravalid = 1;
state->extrablk.bp = curbp;
@@ -1969,7 +1969,7 @@ xfs_dir2_node_addname_int(
dep->inumber = cpu_to_be64(args->inumber);
dep->namelen = args->namelen;
memcpy(dep->name, args->name, dep->namelen);
- dp->d_ops->data_put_ftype(dep, args->filetype);
+ xfs_dir2_data_put_ftype(dp->i_mount, dep, args->filetype);
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);
@@ -2253,7 +2253,7 @@ xfs_dir2_node_replace(
* Fill in the new inode number and log the entry.
*/
dep->inumber = cpu_to_be64(inum);
- args->dp->d_ops->data_put_ftype(dep, ftype);
+ xfs_dir2_data_put_ftype(state->mp, dep, ftype);
xfs_dir2_data_log_entry(args, state->extrablk.bp, dep);
rval = 0;
}
diff --git a/fs/xfs/libxfs/xfs_dir2_priv.h b/fs/xfs/libxfs/xfs_dir2_priv.h
index 99cdc31eb8c9..82764aa2a6f6 100644
--- a/fs/xfs/libxfs/xfs_dir2_priv.h
+++ b/fs/xfs/libxfs/xfs_dir2_priv.h
@@ -61,6 +61,10 @@ 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);
+uint8_t xfs_dir2_data_get_ftype(struct xfs_mount *mp,
+ struct xfs_dir2_data_entry *dep);
+void xfs_dir2_data_put_ftype(struct xfs_mount *mp,
+ struct xfs_dir2_data_entry *dep, uint8_t ftype);

#ifdef DEBUG
extern void xfs_dir3_data_check(struct xfs_inode *dp, struct xfs_buf *bp);
diff --git a/fs/xfs/libxfs/xfs_dir2_sf.c b/fs/xfs/libxfs/xfs_dir2_sf.c
index b5ac27442f9a..db1a82972d9e 100644
--- a/fs/xfs/libxfs/xfs_dir2_sf.c
+++ b/fs/xfs/libxfs/xfs_dir2_sf.c
@@ -319,7 +319,7 @@ xfs_dir2_block_to_sf(
xfs_dir2_sf_put_ino(mp, sfp, sfep,
be64_to_cpu(dep->inumber));
xfs_dir2_sf_put_ftype(mp, sfep,
- dp->d_ops->data_get_ftype(dep));
+ xfs_dir2_data_get_ftype(mp, dep));

sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep);
}
diff --git a/fs/xfs/xfs_dir2_readdir.c b/fs/xfs/xfs_dir2_readdir.c
index 5d945219a735..9540ac7f2dfe 100644
--- a/fs/xfs/xfs_dir2_readdir.c
+++ b/fs/xfs/xfs_dir2_readdir.c
@@ -203,7 +203,7 @@ xfs_dir2_block_getdents(
cook = xfs_dir2_db_off_to_dataptr(geo, geo->datablk, offset);

ctx->pos = cook & 0x7fffffff;
- filetype = dp->d_ops->data_get_ftype(dep);
+ filetype = xfs_dir2_data_get_ftype(dp->i_mount, dep);
/*
* If it didn't fit, set the final offset to here & return.
*/
@@ -458,7 +458,7 @@ xfs_dir2_leaf_getdents(

dep = bp->b_addr + offset;
length = xfs_dir2_data_entsize(mp, dep->namelen);
- filetype = dp->d_ops->data_get_ftype(dep);
+ filetype = xfs_dir2_data_get_ftype(mp, dep);

ctx->pos = xfs_dir2_byte_to_dataptr(curoff) & 0x7fffffff;
if (!xfs_dir2_namecheck(dep->name, dep->namelen)) {
--
2.20.1