diff options
Diffstat (limited to 'fs/xfs/xfs_da_format.c')
| -rw-r--r-- | fs/xfs/xfs_da_format.c | 218 |
1 files changed, 217 insertions, 1 deletions
diff --git a/fs/xfs/xfs_da_format.c b/fs/xfs/xfs_da_format.c index 62f55a0186ae..d0285fdfb6e7 100644 --- a/fs/xfs/xfs_da_format.c +++ b/fs/xfs/xfs_da_format.c @@ -28,7 +28,9 @@ #include "xfs_inode.h" #include "xfs_dir2.h" - +/* + * Shortform directory ops + */ static int xfs_dir2_sf_entsize( struct xfs_dir2_sf_hdr *hdr, @@ -203,6 +205,184 @@ xfs_dir3_sfe_put_ino( (xfs_dir2_inou_t *)&sfep->name[sfep->namelen + 1], ino); } + +/* + * Directory data block operations + */ +static int +__xfs_dir3_data_entsize( + bool ftype, + int n) +{ + int size = offsetof(struct xfs_dir2_data_entry, name[0]); + + size += n; + size += sizeof(xfs_dir2_data_off_t); + if (ftype) + size += sizeof(__uint8_t); + return roundup(size, XFS_DIR2_DATA_ALIGN); +} + +static int +xfs_dir2_data_entsize( + int n) +{ + return __xfs_dir3_data_entsize(false, n); +} +static int +xfs_dir3_data_entsize( + int n) +{ + return __xfs_dir3_data_entsize(true, n); +} + +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]; + + ASSERT(ftype < XFS_DIR3_FT_MAX); + 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; +} + +/* + * 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)); +} + +/* + * Offsets of . and .. in data space (always block 0) + */ +static xfs_dir2_data_aoff_t +xfs_dir2_data_dot_offset(void) +{ + return sizeof(struct xfs_dir2_data_hdr); +} + +static xfs_dir2_data_aoff_t +xfs_dir2_data_dotdot_offset(void) +{ + return xfs_dir2_data_dot_offset() + xfs_dir2_data_entsize(1); +} + +static xfs_dir2_data_aoff_t +xfs_dir2_data_first_offset(void) +{ + return xfs_dir2_data_dotdot_offset() + xfs_dir2_data_entsize(2); +} + +static xfs_dir2_data_aoff_t +xfs_dir3_data_dot_offset(void) +{ + return sizeof(struct xfs_dir3_data_hdr); +} + +static xfs_dir2_data_aoff_t +xfs_dir3_data_dotdot_offset(void) +{ + return xfs_dir3_data_dot_offset() + xfs_dir3_data_entsize(1); +} + +static xfs_dir2_data_aoff_t +xfs_dir3_data_first_offset(void) +{ + return xfs_dir3_data_dotdot_offset() + xfs_dir3_data_entsize(2); +} + +/* + * location of . and .. in data space (always block 0) + */ +static struct xfs_dir2_data_entry * +xfs_dir2_data_dot_entry_p( + struct xfs_dir2_data_hdr *hdr) +{ + return (struct xfs_dir2_data_entry *) + ((char *)hdr + xfs_dir2_data_dot_offset()); +} + +static struct xfs_dir2_data_entry * +xfs_dir2_data_dotdot_entry_p( + struct xfs_dir2_data_hdr *hdr) +{ + return (struct xfs_dir2_data_entry *) + ((char *)hdr + xfs_dir2_data_dotdot_offset()); +} + +static struct xfs_dir2_data_entry * +xfs_dir2_data_first_entry_p( + struct xfs_dir2_data_hdr *hdr) +{ + return (struct xfs_dir2_data_entry *) + ((char *)hdr + xfs_dir2_data_first_offset()); +} + +static struct xfs_dir2_data_entry * +xfs_dir3_data_dot_entry_p( + struct xfs_dir2_data_hdr *hdr) +{ + return (struct xfs_dir2_data_entry *) + ((char *)hdr + xfs_dir3_data_dot_offset()); +} + +static struct xfs_dir2_data_entry * +xfs_dir3_data_dotdot_entry_p( + struct xfs_dir2_data_hdr *hdr) +{ + return (struct xfs_dir2_data_entry *) + ((char *)hdr + xfs_dir3_data_dotdot_offset()); +} + +static struct xfs_dir2_data_entry * +xfs_dir3_data_first_entry_p( + struct xfs_dir2_data_hdr *hdr) +{ + return (struct xfs_dir2_data_entry *) + ((char *)hdr + xfs_dir3_data_first_offset()); +} + const struct xfs_dir_ops xfs_dir2_ops = { .sf_entsize = xfs_dir2_sf_entsize, .sf_nextentry = xfs_dir2_sf_nextentry, @@ -212,6 +392,18 @@ const struct xfs_dir_ops xfs_dir2_ops = { .sf_put_ino = xfs_dir2_sfe_put_ino, .sf_get_parent_ino = xfs_dir2_sf_get_parent_ino, .sf_put_parent_ino = xfs_dir2_sf_put_parent_ino, + + .data_entsize = xfs_dir2_data_entsize, + .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_dot_offset = xfs_dir2_data_dot_offset, + .data_dotdot_offset = xfs_dir2_data_dotdot_offset, + .data_first_offset = xfs_dir2_data_first_offset, + .data_dot_entry_p = xfs_dir2_data_dot_entry_p, + .data_dotdot_entry_p = xfs_dir2_data_dotdot_entry_p, + .data_first_entry_p = xfs_dir2_data_first_entry_p, }; const struct xfs_dir_ops xfs_dir2_ftype_ops = { @@ -223,6 +415,18 @@ const struct xfs_dir_ops xfs_dir2_ftype_ops = { .sf_put_ino = xfs_dir3_sfe_put_ino, .sf_get_parent_ino = xfs_dir2_sf_get_parent_ino, .sf_put_parent_ino = xfs_dir2_sf_put_parent_ino, + + .data_entsize = xfs_dir3_data_entsize, + .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_dot_offset = xfs_dir2_data_dot_offset, + .data_dotdot_offset = xfs_dir2_data_dotdot_offset, + .data_first_offset = xfs_dir2_data_first_offset, + .data_dot_entry_p = xfs_dir2_data_dot_entry_p, + .data_dotdot_entry_p = xfs_dir2_data_dotdot_entry_p, + .data_first_entry_p = xfs_dir2_data_first_entry_p, }; const struct xfs_dir_ops xfs_dir3_ops = { @@ -234,4 +438,16 @@ const struct xfs_dir_ops xfs_dir3_ops = { .sf_put_ino = xfs_dir3_sfe_put_ino, .sf_get_parent_ino = xfs_dir2_sf_get_parent_ino, .sf_put_parent_ino = xfs_dir2_sf_put_parent_ino, + + .data_entsize = xfs_dir3_data_entsize, + .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_dot_offset = xfs_dir3_data_dot_offset, + .data_dotdot_offset = xfs_dir3_data_dotdot_offset, + .data_first_offset = xfs_dir3_data_first_offset, + .data_dot_entry_p = xfs_dir3_data_dot_entry_p, + .data_dotdot_entry_p = xfs_dir3_data_dotdot_entry_p, + .data_first_entry_p = xfs_dir3_data_first_entry_p, }; 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