diff options
Diffstat (limited to 'fs/xfs/xfs_da_format.c')
| -rw-r--r-- | fs/xfs/xfs_da_format.c | 907 |
1 files changed, 907 insertions, 0 deletions
diff --git a/fs/xfs/xfs_da_format.c b/fs/xfs/xfs_da_format.c new file mode 100644 index 00000000000..e6c83e1fbc8 --- /dev/null +++ b/fs/xfs/xfs_da_format.c @@ -0,0 +1,907 @@ +/* + * Copyright (c) 2000,2002,2005 Silicon Graphics, Inc. + * Copyright (c) 2013 Red Hat, Inc. + * All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ +#include "xfs.h" +#include "xfs_fs.h" +#include "xfs_shared.h" +#include "xfs_format.h" +#include "xfs_log_format.h" +#include "xfs_trans_resv.h" +#include "xfs_sb.h" +#include "xfs_ag.h" +#include "xfs_mount.h" +#include "xfs_da_format.h" +#include "xfs_inode.h" +#include "xfs_dir2.h" + +/* + * Shortform directory ops + */ +static int +xfs_dir2_sf_entsize( + struct xfs_dir2_sf_hdr *hdr, + int len) +{ + int count = sizeof(struct xfs_dir2_sf_entry); /* namelen + offset */ + + count += len; /* name */ + count += hdr->i8count ? sizeof(xfs_dir2_ino8_t) : + sizeof(xfs_dir2_ino4_t); /* ino # */ + return count; +} + +static int +xfs_dir3_sf_entsize( + struct xfs_dir2_sf_hdr *hdr, + int len) +{ + return xfs_dir2_sf_entsize(hdr, len) + sizeof(__uint8_t); +} + +static struct xfs_dir2_sf_entry * +xfs_dir2_sf_nextentry( + struct xfs_dir2_sf_hdr *hdr, + struct xfs_dir2_sf_entry *sfep) +{ + return (struct xfs_dir2_sf_entry *) + ((char *)sfep + xfs_dir2_sf_entsize(hdr, sfep->namelen)); +} + +static struct xfs_dir2_sf_entry * +xfs_dir3_sf_nextentry( + struct xfs_dir2_sf_hdr *hdr, + struct xfs_dir2_sf_entry *sfep) +{ + return (struct xfs_dir2_sf_entry *) + ((char *)sfep + xfs_dir3_sf_entsize(hdr, sfep->namelen)); +} + + +/* + * 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; +} + +/* + * 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, + xfs_dir2_inou_t *from) +{ + if (hdr->i8count) + return get_unaligned_be64(&from->i8.i) & 0x00ffffffffffffffULL; + else + return get_unaligned_be32(&from->i4.i); +} + +static void +xfs_dir2_sf_put_ino( + struct xfs_dir2_sf_hdr *hdr, + xfs_dir2_inou_t *to, + xfs_ino_t ino) +{ + ASSERT((ino & 0xff00000000000000ULL) == 0); + + if (hdr->i8count) + put_unaligned_be64(ino, &to->i8.i); + else + put_unaligned_be32(ino, &to->i4.i); +} + +static xfs_ino_t +xfs_dir2_sf_get_parent_ino( + struct xfs_dir2_sf_hdr *hdr) +{ + return xfs_dir2_sf_get_ino(hdr, &hdr->parent); +} + +static 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, + (xfs_dir2_inou_t *)&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, + (xfs_dir2_inou_t *)&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, + (xfs_dir2_inou_t *)&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, + (xfs_dir2_inou_t *)&sfep->name[sfep->namelen + 1], ino); +} + + +/* + * Directory data block operations + */ + +/* + * For special situations, the dirent size ends up fixed because we always know + * what the size of the entry is. That's true for the "." and "..", and + * therefore we know that they are a fixed size and hence their offsets are + * constant, as is the first entry. + * + * Hence, this calculation is written as a macro to be able to be calculated at + * compile time and so certain offsets can be calculated directly in the + * structure initaliser via the macro. There are two macros - one for dirents + * with ftype and without so there are no unresolvable conditionals in the + * calculations. We also use round_up() as XFS_DIR2_DATA_ALIGN is always a power + * of 2 and the compiler doesn't reject it (unlike roundup()). + */ +#define XFS_DIR2_DATA_ENTSIZE(n) \ + round_up((offsetof(struct xfs_dir2_data_entry, name[0]) + (n) + \ + sizeof(xfs_dir2_data_off_t)), XFS_DIR2_DATA_ALIGN) + +#define XFS_DIR3_DATA_ENTSIZE(n) \ + round_up((offsetof(struct xfs_dir2_data_entry, name[0]) + (n) + \ + sizeof(xfs_dir2_data_off_t) + sizeof(__uint8_t)), \ + XFS_DIR2_DATA_ALIGN) + +static int +xfs_dir2_data_entsize( + int n) +{ + return XFS_DIR2_DATA_ENTSIZE(n); +} + +static int +xfs_dir3_data_entsize( + int n) +{ + return XFS_DIR3_DATA_ENTSIZE(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)); +} + +/* + * 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 + sizeof(struct xfs_dir2_data_hdr)); +} + +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 + sizeof(struct xfs_dir2_data_hdr) + + XFS_DIR2_DATA_ENTSIZE(1)); +} + +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 + sizeof(struct xfs_dir2_data_hdr) + + XFS_DIR2_DATA_ENTSIZE(1) + + XFS_DIR2_DATA_ENTSIZE(2)); +} + +static struct xfs_dir2_data_entry * +xfs_dir2_ftype_data_dotdot_entry_p( + struct xfs_dir2_data_hdr *hdr) +{ + return (struct xfs_dir2_data_entry *) + ((char *)hdr + sizeof(struct xfs_dir2_data_hdr) + + XFS_DIR3_DATA_ENTSIZE(1)); +} + +static struct xfs_dir2_data_entry * +xfs_dir2_ftype_data_first_entry_p( + struct xfs_dir2_data_hdr *hdr) +{ + return (struct xfs_dir2_data_entry *) + ((char *)hdr + sizeof(struct xfs_dir2_data_hdr) + + XFS_DIR3_DATA_ENTSIZE(1) + + XFS_DIR3_DATA_ENTSIZE(2)); +} + +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 + sizeof(struct xfs_dir3_data_hdr)); +} + +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 + sizeof(struct xfs_dir3_data_hdr) + + XFS_DIR3_DATA_ENTSIZE(1)); +} + +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 + sizeof(struct xfs_dir3_data_hdr) + + XFS_DIR3_DATA_ENTSIZE(1) + + XFS_DIR3_DATA_ENTSIZE(2)); +} + +static struct xfs_dir2_data_free * +xfs_dir2_data_bestfree_p(struct xfs_dir2_data_hdr *hdr) +{ + return hdr->bestfree; +} + +static struct xfs_dir2_data_free * +xfs_dir3_data_bestfree_p(struct xfs_dir2_data_hdr *hdr) +{ + return ((struct xfs_dir3_data_hdr *)hdr)->best_free; +} + +static struct xfs_dir2_data_entry * +xfs_dir2_data_entry_p(struct xfs_dir2_data_hdr *hdr) +{ + return (struct xfs_dir2_data_entry *) + ((char *)hdr + sizeof(struct xfs_dir2_data_hdr)); +} + +static struct xfs_dir2_data_unused * +xfs_dir2_data_unused_p(struct xfs_dir2_data_hdr *hdr) +{ + return (struct xfs_dir2_data_unused *) + ((char *)hdr + sizeof(struct xfs_dir2_data_hdr)); +} + +static struct xfs_dir2_data_entry * +xfs_dir3_data_entry_p(struct xfs_dir2_data_hdr *hdr) +{ + return (struct xfs_dir2_data_entry *) + ((char *)hdr + sizeof(struct xfs_dir3_data_hdr)); +} + +static struct xfs_dir2_data_unused * +xfs_dir3_data_unused_p(struct xfs_dir2_data_hdr *hdr) +{ + return (struct xfs_dir2_data_unused *) + ((char *)hdr + sizeof(struct xfs_dir3_data_hdr)); +} + + +/* + * Directory Leaf block operations + */ +static int +xfs_dir2_max_leaf_ents(struct xfs_mount *mp) +{ + return (mp->m_dirblksize - sizeof(struct xfs_dir2_leaf_hdr)) / + (uint)sizeof(struct xfs_dir2_leaf_entry); +} + +static struct xfs_dir2_leaf_entry * +xfs_dir2_leaf_ents_p(struct xfs_dir2_leaf *lp) +{ + return lp->__ents; +} + +static int +xfs_dir3_max_leaf_ents(struct xfs_mount *mp) +{ + return (mp->m_dirblksize - sizeof(struct xfs_dir3_leaf_hdr)) / + (uint)sizeof(struct xfs_dir2_leaf_entry); +} + +static struct xfs_dir2_leaf_entry * +xfs_dir3_leaf_ents_p(struct xfs_dir2_leaf *lp) +{ + return ((struct xfs_dir3_leaf *)lp)->__ents; +} + +static void +xfs_dir2_leaf_hdr_from_disk( + struct xfs_dir3_icleaf_hdr *to, + struct xfs_dir2_leaf *from) +{ + to->forw = be32_to_cpu(from->hdr.info.forw); + to->back = be32_to_cpu(from->hdr.info.back); + to->magic = be16_to_cpu(from->hdr.info.magic); + to->count = be16_to_cpu(from->hdr.count); + to->stale = be16_to_cpu(from->hdr.stale); + + ASSERT(to->magic == XFS_DIR2_LEAF1_MAGIC || + to->magic == XFS_DIR2_LEAFN_MAGIC); +} + +static void +xfs_dir2_leaf_hdr_to_disk( + struct xfs_dir2_leaf *to, + struct xfs_dir3_icleaf_hdr *from) +{ + ASSERT(from->magic == XFS_DIR2_LEAF1_MAGIC || + from->magic == XFS_DIR2_LEAFN_MAGIC); + + to->hdr.info.forw = cpu_to_be32(from->forw); + to->hdr.info.back = cpu_to_be32(from->back); + to->hdr.info.magic = cpu_to_be16(from->magic); + to->hdr.count = cpu_to_be16(from->count); + to->hdr.stale = cpu_to_be16(from->stale); +} + +static void +xfs_dir3_leaf_hdr_from_disk( + struct xfs_dir3_icleaf_hdr *to, + struct xfs_dir2_leaf *from) +{ + struct xfs_dir3_leaf_hdr *hdr3 = (struct xfs_dir3_leaf_hdr *)from; + + to->forw = be32_to_cpu(hdr3->info.hdr.forw); + to->back = be32_to_cpu(hdr3->info.hdr.back); + to->magic = be16_to_cpu(hdr3->info.hdr.magic); + to->count = be16_to_cpu(hdr3->count); + to->stale = be16_to_cpu(hdr3->stale); + + ASSERT(to->magic == XFS_DIR3_LEAF1_MAGIC || + to->magic == XFS_DIR3_LEAFN_MAGIC); +} + +static void +xfs_dir3_leaf_hdr_to_disk( + struct xfs_dir2_leaf *to, + struct xfs_dir3_icleaf_hdr *from) +{ + struct xfs_dir3_leaf_hdr *hdr3 = (struct xfs_dir3_leaf_hdr *)to; + + ASSERT(from->magic == XFS_DIR3_LEAF1_MAGIC || + from->magic == XFS_DIR3_LEAFN_MAGIC); + + hdr3->info.hdr.forw = cpu_to_be32(from->forw); + hdr3->info.hdr.back = cpu_to_be32(from->back); + hdr3->info.hdr.magic = cpu_to_be16(from->magic); + hdr3->count = cpu_to_be16(from->count); + hdr3->stale = cpu_to_be16(from->stale); +} + + +/* + * Directory/Attribute Node block operations + */ +static struct xfs_da_node_entry * +xfs_da2_node_tree_p(struct xfs_da_intnode *dap) +{ + return dap->__btree; +} + +static struct xfs_da_node_entry * +xfs_da3_node_tree_p(struct xfs_da_intnode *dap) +{ + return ((struct xfs_da3_intnode *)dap)->__btree; +} + +static void +xfs_da2_node_hdr_from_disk( + struct xfs_da3_icnode_hdr *to, + struct xfs_da_intnode *from) +{ + ASSERT(from->hdr.info.magic == cpu_to_be16(XFS_DA_NODE_MAGIC)); + to->forw = be32_to_cpu(from->hdr.info.forw); + to->back = be32_to_cpu(from->hdr.info.back); + to->magic = be16_to_cpu(from->hdr.info.magic); + to->count = be16_to_cpu(from->hdr.__count); + to->level = be16_to_cpu(from->hdr.__level); +} + +static void +xfs_da2_node_hdr_to_disk( + struct xfs_da_intnode *to, + struct xfs_da3_icnode_hdr *from) +{ + ASSERT(from->magic == XFS_DA_NODE_MAGIC); + to->hdr.info.forw = cpu_to_be32(from->forw); + to->hdr.info.back = cpu_to_be32(from->back); + to->hdr.info.magic = cpu_to_be16(from->magic); + to->hdr.__count = cpu_to_be16(from->count); + to->hdr.__level = cpu_to_be16(from->level); +} + +static void +xfs_da3_node_hdr_from_disk( + struct xfs_da3_icnode_hdr *to, + struct xfs_da_intnode *from) +{ + struct xfs_da3_node_hdr *hdr3 = (struct xfs_da3_node_hdr *)from; + + ASSERT(from->hdr.info.magic == cpu_to_be16(XFS_DA3_NODE_MAGIC)); + to->forw = be32_to_cpu(hdr3->info.hdr.forw); + to->back = be32_to_cpu(hdr3->info.hdr.back); + to->magic = be16_to_cpu(hdr3->info.hdr.magic); + to->count = be16_to_cpu(hdr3->__count); + to->level = be16_to_cpu(hdr3->__level); +} + +static void +xfs_da3_node_hdr_to_disk( + struct xfs_da_intnode *to, + struct xfs_da3_icnode_hdr *from) +{ + struct xfs_da3_node_hdr *hdr3 = (struct xfs_da3_node_hdr *)to; + + ASSERT(from->magic == XFS_DA3_NODE_MAGIC); + hdr3->info.hdr.forw = cpu_to_be32(from->forw); + hdr3->info.hdr.back = cpu_to_be32(from->back); + hdr3->info.hdr.magic = cpu_to_be16(from->magic); + hdr3->__count = cpu_to_be16(from->count); + hdr3->__level = cpu_to_be16(from->level); +} + + +/* + * Directory free space block operations + */ +static int +xfs_dir2_free_max_bests(struct xfs_mount *mp) +{ + return (mp->m_dirblksize - sizeof(struct xfs_dir2_free_hdr)) / + sizeof(xfs_dir2_data_off_t); +} + +static __be16 * +xfs_dir2_free_bests_p(struct xfs_dir2_free *free) +{ + return (__be16 *)((char *)free + sizeof(struct xfs_dir2_free_hdr)); +} + +/* + * Convert data space db to the corresponding free db. + */ +static xfs_dir2_db_t +xfs_dir2_db_to_fdb(struct xfs_mount *mp, xfs_dir2_db_t db) +{ + return XFS_DIR2_FREE_FIRSTDB(mp) + db / xfs_dir2_free_max_bests(mp); +} + +/* + * Convert data space db to the corresponding index in a free db. + */ +static int +xfs_dir2_db_to_fdindex(struct xfs_mount *mp, xfs_dir2_db_t db) +{ + return db % xfs_dir2_free_max_bests(mp); +} + +static int +xfs_dir3_free_max_bests(struct xfs_mount *mp) +{ + return (mp->m_dirblksize - sizeof(struct xfs_dir3_free_hdr)) / + sizeof(xfs_dir2_data_off_t); +} + +static __be16 * +xfs_dir3_free_bests_p(struct xfs_dir2_free *free) +{ + return (__be16 *)((char *)free + sizeof(struct xfs_dir3_free_hdr)); +} + +/* + * Convert data space db to the corresponding free db. + */ +static xfs_dir2_db_t +xfs_dir3_db_to_fdb(struct xfs_mount *mp, xfs_dir2_db_t db) +{ + return XFS_DIR2_FREE_FIRSTDB(mp) + db / xfs_dir3_free_max_bests(mp); +} + +/* + * Convert data space db to the corresponding index in a free db. + */ +static int +xfs_dir3_db_to_fdindex(struct xfs_mount *mp, xfs_dir2_db_t db) +{ + return db % xfs_dir3_free_max_bests(mp); +} + +static void +xfs_dir2_free_hdr_from_disk( + struct xfs_dir3_icfree_hdr *to, + struct xfs_dir2_free *from) +{ + to->magic = be32_to_cpu(from->hdr.magic); + to->firstdb = be32_to_cpu(from->hdr.firstdb); + to->nvalid = be32_to_cpu(from->hdr.nvalid); + to->nused = be32_to_cpu(from->hdr.nused); + ASSERT(to->magic == XFS_DIR2_FREE_MAGIC); +} + +static void +xfs_dir2_free_hdr_to_disk( + struct xfs_dir2_free *to, + struct xfs_dir3_icfree_hdr *from) +{ + ASSERT(from->magic == XFS_DIR2_FREE_MAGIC); + + to->hdr.magic = cpu_to_be32(from->magic); + to->hdr.firstdb = cpu_to_be32(from->firstdb); + to->hdr.nvalid = cpu_to_be32(from->nvalid); + to->hdr.nused = cpu_to_be32(from->nused); +} + +static void +xfs_dir3_free_hdr_from_disk( + struct xfs_dir3_icfree_hdr *to, + struct xfs_dir2_free *from) +{ + struct xfs_dir3_free_hdr *hdr3 = (struct xfs_dir3_free_hdr *)from; + + to->magic = be32_to_cpu(hdr3->hdr.magic); + to->firstdb = be32_to_cpu(hdr3->firstdb); + to->nvalid = be32_to_cpu(hdr3->nvalid); + to->nused = be32_to_cpu(hdr3->nused); + + ASSERT(to->magic == XFS_DIR3_FREE_MAGIC); +} + +static void +xfs_dir3_free_hdr_to_disk( + struct xfs_dir2_free *to, + struct xfs_dir3_icfree_hdr *from) +{ + struct xfs_dir3_free_hdr *hdr3 = (struct xfs_dir3_free_hdr *)to; + + ASSERT(from->magic == XFS_DIR3_FREE_MAGIC); + + hdr3->hdr.magic = cpu_to_be32(from->magic); + hdr3->firstdb = cpu_to_be32(from->firstdb); + hdr3->nvalid = cpu_to_be32(from->nvalid); + hdr3->nused = cpu_to_be32(from->nused); +} + +static const struct xfs_dir_ops xfs_dir2_ops = { + .sf_entsize = xfs_dir2_sf_entsize, + .sf_nextentry = xfs_dir2_sf_nextentry, + .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, + .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_bestfree_p = xfs_dir2_data_bestfree_p, + + .data_dot_offset = sizeof(struct xfs_dir2_data_hdr), + .data_dotdot_offset = sizeof(struct xfs_dir2_data_hdr) + + XFS_DIR2_DATA_ENTSIZE(1), + .data_first_offset = sizeof(struct xfs_dir2_data_hdr) + + XFS_DIR2_DATA_ENTSIZE(1) + + XFS_DIR2_DATA_ENTSIZE(2), + .data_entry_offset = sizeof(struct xfs_dir2_data_hdr), + + .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, + .data_entry_p = xfs_dir2_data_entry_p, + .data_unused_p = xfs_dir2_data_unused_p, + + .leaf_hdr_size = sizeof(struct xfs_dir2_leaf_hdr), + .leaf_hdr_to_disk = xfs_dir2_leaf_hdr_to_disk, + .leaf_hdr_from_disk = xfs_dir2_leaf_hdr_from_disk, + .leaf_max_ents = xfs_dir2_max_leaf_ents, + .leaf_ents_p = xfs_dir2_leaf_ents_p, + + .node_hdr_size = sizeof(struct xfs_da_node_hdr), + .node_hdr_to_disk = xfs_da2_node_hdr_to_disk, + .node_hdr_from_disk = xfs_da2_node_hdr_from_disk, + .node_tree_p = xfs_da2_node_tree_p, + + .free_hdr_size = sizeof(struct xfs_dir2_free_hdr), + .free_hdr_to_disk = xfs_dir2_free_hdr_to_disk, + .free_hdr_from_disk = xfs_dir2_free_hdr_from_disk, + .free_max_bests = xfs_dir2_free_max_bests, + .free_bests_p = xfs_dir2_free_bests_p, + .db_to_fdb = xfs_dir2_db_to_fdb, + .db_to_fdindex = xfs_dir2_db_to_fdindex, +}; + +static const struct xfs_dir_ops xfs_dir2_ftype_ops = { + .sf_entsize = xfs_dir3_sf_entsize, + .sf_nextentry = xfs_dir3_sf_nextentry, + .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, + .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_bestfree_p = xfs_dir2_data_bestfree_p, + + .data_dot_offset = sizeof(struct xfs_dir2_data_hdr), + .data_dotdot_offset = sizeof(struct xfs_dir2_data_hdr) + + XFS_DIR3_DATA_ENTSIZE(1), + .data_first_offset = sizeof(struct xfs_dir2_data_hdr) + + XFS_DIR3_DATA_ENTSIZE(1) + + XFS_DIR3_DATA_ENTSIZE(2), + .data_entry_offset = sizeof(struct xfs_dir2_data_hdr), + + .data_dot_entry_p = xfs_dir2_data_dot_entry_p, + .data_dotdot_entry_p = xfs_dir2_ftype_data_dotdot_entry_p, + .data_first_entry_p = xfs_dir2_ftype_data_first_entry_p, + .data_entry_p = xfs_dir2_data_entry_p, + .data_unused_p = xfs_dir2_data_unused_p, + + .leaf_hdr_size = sizeof(struct xfs_dir2_leaf_hdr), + .leaf_hdr_to_disk = xfs_dir2_leaf_hdr_to_disk, + .leaf_hdr_from_disk = xfs_dir2_leaf_hdr_from_disk, + .leaf_max_ents = xfs_dir2_max_leaf_ents, + .leaf_ents_p = xfs_dir2_leaf_ents_p, + + .node_hdr_size = sizeof(struct xfs_da_node_hdr), + .node_hdr_to_disk = xfs_da2_node_hdr_to_disk, + .node_hdr_from_disk = xfs_da2_node_hdr_from_disk, + .node_tree_p = xfs_da2_node_tree_p, + + .free_hdr_size = sizeof(struct xfs_dir2_free_hdr), + .free_hdr_to_disk = xfs_dir2_free_hdr_to_disk, + .free_hdr_from_disk = xfs_dir2_free_hdr_from_disk, + .free_max_bests = xfs_dir2_free_max_bests, + .free_bests_p = xfs_dir2_free_bests_p, + .db_to_fdb = xfs_dir2_db_to_fdb, + .db_to_fdindex = xfs_dir2_db_to_fdindex, +}; + +static const struct xfs_dir_ops xfs_dir3_ops = { + .sf_entsize = xfs_dir3_sf_entsize, + .sf_nextentry = xfs_dir3_sf_nextentry, + .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, + .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_bestfree_p = xfs_dir3_data_bestfree_p, + + .data_dot_offset = sizeof(struct xfs_dir3_data_hdr), + .data_dotdot_offset = sizeof(struct xfs_dir3_data_hdr) + + XFS_DIR3_DATA_ENTSIZE(1), + .data_first_offset = sizeof(struct xfs_dir3_data_hdr) + + XFS_DIR3_DATA_ENTSIZE(1) + + XFS_DIR3_DATA_ENTSIZE(2), + .data_entry_offset = sizeof(struct xfs_dir3_data_hdr), + + .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, + .data_entry_p = xfs_dir3_data_entry_p, + .data_unused_p = xfs_dir3_data_unused_p, + + .leaf_hdr_size = sizeof(struct xfs_dir3_leaf_hdr), + .leaf_hdr_to_disk = xfs_dir3_leaf_hdr_to_disk, + .leaf_hdr_from_disk = xfs_dir3_leaf_hdr_from_disk, + .leaf_max_ents = xfs_dir3_max_leaf_ents, + .leaf_ents_p = xfs_dir3_leaf_ents_p, + + .node_hdr_size = sizeof(struct xfs_da3_node_hdr), + .node_hdr_to_disk = xfs_da3_node_hdr_to_disk, + .node_hdr_from_disk = xfs_da3_node_hdr_from_disk, + .node_tree_p = xfs_da3_node_tree_p, + + .free_hdr_size = sizeof(struct xfs_dir3_free_hdr), + .free_hdr_to_disk = xfs_dir3_free_hdr_to_disk, + .free_hdr_from_disk = xfs_dir3_free_hdr_from_disk, + .free_max_bests = xfs_dir3_free_max_bests, + .free_bests_p = xfs_dir3_free_bests_p, + .db_to_fdb = xfs_dir3_db_to_fdb, + .db_to_fdindex = xfs_dir3_db_to_fdindex, +}; + +static const struct xfs_dir_ops xfs_dir2_nondir_ops = { + .node_hdr_size = sizeof(struct xfs_da_node_hdr), + .node_hdr_to_disk = xfs_da2_node_hdr_to_disk, + .node_hdr_from_disk = xfs_da2_node_hdr_from_disk, + .node_tree_p = xfs_da2_node_tree_p, +}; + +static const struct xfs_dir_ops xfs_dir3_nondir_ops = { + .node_hdr_size = sizeof(struct xfs_da3_node_hdr), + .node_hdr_to_disk = xfs_da3_node_hdr_to_disk, + .node_hdr_from_disk = xfs_da3_node_hdr_from_disk, + .node_tree_p = xfs_da3_node_tree_p, +}; + +/* + * Return the ops structure according to the current config. If we are passed + * an inode, then that overrides the default config we use which is based on + * feature bits. + */ +const struct xfs_dir_ops * +xfs_dir_get_ops( + struct xfs_mount *mp, + struct xfs_inode *dp) +{ + if (dp) + return dp->d_ops; + if (mp->m_dir_inode_ops) + return mp->m_dir_inode_ops; + if (xfs_sb_version_hascrc(&mp->m_sb)) + return &xfs_dir3_ops; + if (xfs_sb_version_hasftype(&mp->m_sb)) + return &xfs_dir2_ftype_ops; + return &xfs_dir2_ops; +} + +const struct xfs_dir_ops * +xfs_nondir_get_ops( + struct xfs_mount *mp, + struct xfs_inode *dp) +{ + if (dp) + return dp->d_ops; + if (mp->m_nondir_inode_ops) + return mp->m_nondir_inode_ops; + if (xfs_sb_version_hascrc(&mp->m_sb)) + return &xfs_dir3_nondir_ops; + return &xfs_dir2_nondir_ops; +} |