xfs: devirtualize ->sf_get_ino and ->sf_put_ino

Replace the ->sf_get_ino and ->sf_put_ino dir ops methods with directly
called xfs_dir2_sf_get_ino and xfs_dir2_sf_put_ino helpers that take care
of the difference between the directory format with and without the file
type field.  Also move xfs_dir2_sf_get_parent_ino and
xfs_dir2_sf_put_parent_ino to xfs_dir2_sf.c with the rest of the
low-level short form entry handling and use XFS_MAXINUMBER istead of
opencoded constants.

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>

diff --git a/fs/xfs/libxfs/xfs_da_format.c b/fs/xfs/libxfs/xfs_da_format.c
index f80495a..f427f14 100644 (file)
--- a/fs/xfs/libxfs/xfs_da_format.c
+++ b/fs/xfs/libxfs/xfs_da_format.c
@@ -59,94 +59,6 @@ xfs_dir3_sfe_put_ftype(
 }
 
 /*
- * Inode numbers in short-form directories can come in two versions,
- * either 4 bytes or 8 bytes wide.  These helpers deal with the
- * two forms transparently by looking at the headers i8count field.
- *
- * For 64-bit inode number the most significant byte must be zero.
- */
-static xfs_ino_t
-xfs_dir2_sf_get_ino(
-       struct xfs_dir2_sf_hdr  *hdr,
-       uint8_t                 *from)
-{
-       if (hdr->i8count)
-               return get_unaligned_be64(from) & 0x00ffffffffffffffULL;
-       else
-               return get_unaligned_be32(from);
-}
-
-static void
-xfs_dir2_sf_put_ino(
-       struct xfs_dir2_sf_hdr  *hdr,
-       uint8_t                 *to,
-       xfs_ino_t               ino)
-{
-       ASSERT((ino & 0xff00000000000000ULL) == 0);
-
-       if (hdr->i8count)
-               put_unaligned_be64(ino, to);
-       else
-               put_unaligned_be32(ino, to);
-}
-
-xfs_ino_t
-xfs_dir2_sf_get_parent_ino(
-       struct xfs_dir2_sf_hdr  *hdr)
-{
-       return xfs_dir2_sf_get_ino(hdr, hdr->parent);
-}
-
-void
-xfs_dir2_sf_put_parent_ino(
-       struct xfs_dir2_sf_hdr  *hdr,
-       xfs_ino_t               ino)
-{
-       xfs_dir2_sf_put_ino(hdr, hdr->parent, ino);
-}
-
-/*
- * In short-form directory entries the inode numbers are stored at variable
- * offset behind the entry name. If the entry stores a filetype value, then it
- * sits between the name and the inode number. Hence the inode numbers may only
- * be accessed through the helpers below.
- */
-static xfs_ino_t
-xfs_dir2_sfe_get_ino(
-       struct xfs_dir2_sf_hdr  *hdr,
-       struct xfs_dir2_sf_entry *sfep)
-{
-       return xfs_dir2_sf_get_ino(hdr, &sfep->name[sfep->namelen]);
-}
-
-static void
-xfs_dir2_sfe_put_ino(
-       struct xfs_dir2_sf_hdr  *hdr,
-       struct xfs_dir2_sf_entry *sfep,
-       xfs_ino_t               ino)
-{
-       xfs_dir2_sf_put_ino(hdr, &sfep->name[sfep->namelen], ino);
-}
-
-static xfs_ino_t
-xfs_dir3_sfe_get_ino(
-       struct xfs_dir2_sf_hdr  *hdr,
-       struct xfs_dir2_sf_entry *sfep)
-{
-       return xfs_dir2_sf_get_ino(hdr, &sfep->name[sfep->namelen + 1]);
-}
-
-static void
-xfs_dir3_sfe_put_ino(
-       struct xfs_dir2_sf_hdr  *hdr,
-       struct xfs_dir2_sf_entry *sfep,
-       xfs_ino_t               ino)
-{
-       xfs_dir2_sf_put_ino(hdr, &sfep->name[sfep->namelen + 1], ino);
-}
-
-
-/*
  * Directory data block operations
  */
 
@@ -361,8 +273,6 @@ 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,
-       .sf_get_ino = xfs_dir2_sfe_get_ino,
-       .sf_put_ino = xfs_dir2_sfe_put_ino,
 
        .data_entsize = xfs_dir2_data_entsize,
        .data_get_ftype = xfs_dir2_data_get_ftype,
@@ -388,8 +298,6 @@ 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,
-       .sf_get_ino = xfs_dir3_sfe_get_ino,
-       .sf_put_ino = xfs_dir3_sfe_put_ino,
 
        .data_entsize = xfs_dir3_data_entsize,
        .data_get_ftype = xfs_dir3_data_get_ftype,
@@ -415,8 +323,6 @@ 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,
-       .sf_get_ino = xfs_dir3_sfe_get_ino,
-       .sf_put_ino = xfs_dir3_sfe_put_ino,
 
        .data_entsize = xfs_dir3_data_entsize,
        .data_get_ftype = xfs_dir3_data_get_ftype,

diff --git a/fs/xfs/libxfs/xfs_dir2.h b/fs/xfs/libxfs/xfs_dir2.h
index c99f0ad..049d844 100644 (file)
--- a/fs/xfs/libxfs/xfs_dir2.h
+++ b/fs/xfs/libxfs/xfs_dir2.h
@@ -35,11 +35,6 @@ 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);
-       xfs_ino_t (*sf_get_ino)(struct xfs_dir2_sf_hdr *hdr,
-                               struct xfs_dir2_sf_entry *sfep);
-       void    (*sf_put_ino)(struct xfs_dir2_sf_hdr *hdr,
-                             struct xfs_dir2_sf_entry *sfep,
-                             xfs_ino_t ino);
 
        int     (*data_entsize)(int len);
        uint8_t (*data_get_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 a6decb4..02b0344 100644 (file)
--- a/fs/xfs/libxfs/xfs_dir2_block.c
+++ b/fs/xfs/libxfs/xfs_dir2_block.c
@@ -1208,7 +1208,7 @@ xfs_dir2_sf_to_block(
                 * Copy a real entry.
                 */
                dep = (xfs_dir2_data_entry_t *)((char *)hdr + newoffset);
-               dep->inumber = cpu_to_be64(dp->d_ops->sf_get_ino(sfp, sfep));
+               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));
                memcpy(dep->name, sfep->name, dep->namelen);

diff --git a/fs/xfs/libxfs/xfs_dir2_priv.h b/fs/xfs/libxfs/xfs_dir2_priv.h
index 357b388..a194a7b 100644 (file)
--- a/fs/xfs/libxfs/xfs_dir2_priv.h
+++ b/fs/xfs/libxfs/xfs_dir2_priv.h
@@ -145,6 +145,8 @@ extern int xfs_dir2_free_read(struct xfs_trans *tp, struct xfs_inode *dp,
                xfs_dablk_t fbno, struct xfs_buf **bpp);
 
 /* xfs_dir2_sf.c */
+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);
 struct xfs_dir2_sf_entry *xfs_dir2_sf_nextentry(struct xfs_mount *mp,

diff --git a/fs/xfs/libxfs/xfs_dir2_sf.c b/fs/xfs/libxfs/xfs_dir2_sf.c
index 36d79ec..f63fb04 100644 (file)
--- a/fs/xfs/libxfs/xfs_dir2_sf.c
+++ b/fs/xfs/libxfs/xfs_dir2_sf.c
@@ -63,6 +63,70 @@ xfs_dir2_sf_nextentry(
 }
 
 /*
+ * In short-form directory entries the inode numbers are stored at variable
+ * offset behind the entry name. If the entry stores a filetype value, then it
+ * sits between the name and the inode number.  The actual inode numbers can
+ * come in two formats as well, either 4 bytes or 8 bytes wide.
+ */
+xfs_ino_t
+xfs_dir2_sf_get_ino(
+       struct xfs_mount                *mp,
+       struct xfs_dir2_sf_hdr          *hdr,
+       struct xfs_dir2_sf_entry        *sfep)
+{
+       uint8_t                         *from = sfep->name + sfep->namelen;
+
+       if (xfs_sb_version_hasftype(&mp->m_sb))
+               from++;
+
+       if (!hdr->i8count)
+               return get_unaligned_be32(from);
+       return get_unaligned_be64(from) & XFS_MAXINUMBER;
+}
+
+static void
+xfs_dir2_sf_put_ino(
+       struct xfs_mount                *mp,
+       struct xfs_dir2_sf_hdr          *hdr,
+       struct xfs_dir2_sf_entry        *sfep,
+       xfs_ino_t                       ino)
+{
+       uint8_t                         *to = sfep->name + sfep->namelen;
+
+       ASSERT(ino <= XFS_MAXINUMBER);
+
+       if (xfs_sb_version_hasftype(&mp->m_sb))
+               to++;
+
+       if (hdr->i8count)
+               put_unaligned_be64(ino, to);
+       else
+               put_unaligned_be32(ino, to);
+}
+
+xfs_ino_t
+xfs_dir2_sf_get_parent_ino(
+       struct xfs_dir2_sf_hdr  *hdr)
+{
+       if (!hdr->i8count)
+               return get_unaligned_be32(hdr->parent);
+       return get_unaligned_be64(hdr->parent) & XFS_MAXINUMBER;
+}
+
+void
+xfs_dir2_sf_put_parent_ino(
+       struct xfs_dir2_sf_hdr          *hdr,
+       xfs_ino_t                       ino)
+{
+       ASSERT(ino <= XFS_MAXINUMBER);
+
+       if (hdr->i8count)
+               put_unaligned_be64(ino, hdr->parent);
+       else
+               put_unaligned_be32(ino, hdr->parent);
+}
+
+/*
  * 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
  * space currently present in the inode.  If it won't fit, the output
@@ -239,7 +303,7 @@ xfs_dir2_block_to_sf(
                                (xfs_dir2_data_aoff_t)
                                ((char *)dep - (char *)hdr));
                        memcpy(sfep->name, dep->name, dep->namelen);
-                       dp->d_ops->sf_put_ino(sfp, sfep,
+                       xfs_dir2_sf_put_ino(mp, sfp, sfep,
                                              be64_to_cpu(dep->inumber));
                        dp->d_ops->sf_put_ftype(sfep,
                                        dp->d_ops->data_get_ftype(dep));
@@ -406,7 +470,7 @@ xfs_dir2_sf_addname_easy(
        sfep->namelen = args->namelen;
        xfs_dir2_sf_put_offset(sfep, offset);
        memcpy(sfep->name, args->name, sfep->namelen);
-       dp->d_ops->sf_put_ino(sfp, sfep, args->inumber);
+       xfs_dir2_sf_put_ino(mp, sfp, sfep, args->inumber);
        dp->d_ops->sf_put_ftype(sfep, args->filetype);
 
        /*
@@ -496,7 +560,7 @@ xfs_dir2_sf_addname_hard(
        sfep->namelen = args->namelen;
        xfs_dir2_sf_put_offset(sfep, offset);
        memcpy(sfep->name, args->name, sfep->namelen);
-       dp->d_ops->sf_put_ino(sfp, sfep, args->inumber);
+       xfs_dir2_sf_put_ino(mp, sfp, sfep, args->inumber);
        dp->d_ops->sf_put_ftype(sfep, args->filetype);
        sfp->count++;
        if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange)
@@ -613,7 +677,7 @@ xfs_dir2_sf_check(
             i < sfp->count;
             i++, sfep = xfs_dir2_sf_nextentry(dp->i_mount, sfp, sfep)) {
                ASSERT(xfs_dir2_sf_get_offset(sfep) >= offset);
-               ino = dp->d_ops->sf_get_ino(sfp, sfep);
+               ino = xfs_dir2_sf_get_ino(dp->i_mount, sfp, sfep);
                i8count += ino > XFS_DIR2_MAX_SHORT_INUM;
                offset =
                        xfs_dir2_sf_get_offset(sfep) +
@@ -705,7 +769,7 @@ xfs_dir2_sf_verify(
                        return __this_address;
 
                /* Check the inode number. */
-               ino = dops->sf_get_ino(sfp, sfep);
+               ino = xfs_dir2_sf_get_ino(mp, sfp, sfep);
                i8count += ino > XFS_DIR2_MAX_SHORT_INUM;
                error = xfs_dir_ino_validate(mp, ino);
                if (error)
@@ -848,7 +912,7 @@ xfs_dir2_sf_lookup(
                                                                sfep->namelen);
                if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) {
                        args->cmpresult = cmp;
-                       args->inumber = dp->d_ops->sf_get_ino(sfp, sfep);
+                       args->inumber = xfs_dir2_sf_get_ino(mp, sfp, sfep);
                        args->filetype = dp->d_ops->sf_get_ftype(sfep);
                        if (cmp == XFS_CMP_EXACT)
                                return -EEXIST;
@@ -901,7 +965,7 @@ xfs_dir2_sf_removename(
             i++, sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep)) {
                if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
                                                                XFS_CMP_EXACT) {
-                       ASSERT(dp->d_ops->sf_get_ino(sfp, sfep) ==
+                       ASSERT(xfs_dir2_sf_get_ino(mp, sfp, sfep) ==
                               args->inumber);
                        break;
                }
@@ -1016,9 +1080,10 @@ xfs_dir2_sf_replace(
                     i++, sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep)) {
                        if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
                                                                XFS_CMP_EXACT) {
-                               ino = dp->d_ops->sf_get_ino(sfp, sfep);
+                               ino = xfs_dir2_sf_get_ino(mp, sfp, sfep);
                                ASSERT(args->inumber != ino);
-                               dp->d_ops->sf_put_ino(sfp, sfep, args->inumber);
+                               xfs_dir2_sf_put_ino(mp, sfp, sfep,
+                                               args->inumber);
                                dp->d_ops->sf_put_ftype(sfep, args->filetype);
                                break;
                        }
@@ -1123,8 +1188,8 @@ xfs_dir2_sf_toino4(
                sfep->namelen = oldsfep->namelen;
                memcpy(sfep->offset, oldsfep->offset, sizeof(sfep->offset));
                memcpy(sfep->name, oldsfep->name, sfep->namelen);
-               dp->d_ops->sf_put_ino(sfp, sfep,
-                                     dp->d_ops->sf_get_ino(oldsfp, oldsfep));
+               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));
        }
        /*
@@ -1195,8 +1260,8 @@ xfs_dir2_sf_toino8(
                sfep->namelen = oldsfep->namelen;
                memcpy(sfep->offset, oldsfep->offset, sizeof(sfep->offset));
                memcpy(sfep->name, oldsfep->name, sfep->namelen);
-               dp->d_ops->sf_put_ino(sfp, sfep,
-                                     dp->d_ops->sf_get_ino(oldsfp, oldsfep));
+               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));
        }
        /*

diff --git a/fs/xfs/xfs_dir2_readdir.c b/fs/xfs/xfs_dir2_readdir.c
index 7d150e9..9d318f0 100644 (file)
--- a/fs/xfs/xfs_dir2_readdir.c
+++ b/fs/xfs/xfs_dir2_readdir.c
@@ -114,7 +114,7 @@ xfs_dir2_sf_getdents(
                        continue;
                }
 
-               ino = dp->d_ops->sf_get_ino(sfp, sfep);
+               ino = xfs_dir2_sf_get_ino(mp, sfp, sfep);
                filetype = dp->d_ops->sf_get_ftype(sfep);
                ctx->pos = off & 0x7fffffff;
                if (!xfs_dir2_namecheck(sfep->name, sfep->namelen)) {