diff options
Diffstat (limited to 'fs/xfs/libxfs/xfs_dir2.h')
| -rw-r--r-- | fs/xfs/libxfs/xfs_dir2.h | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_dir2.h b/fs/xfs/libxfs/xfs_dir2.h new file mode 100644 index 000000000000..c8e86b0b5e99 --- /dev/null +++ b/fs/xfs/libxfs/xfs_dir2.h @@ -0,0 +1,180 @@ +/* + * Copyright (c) 2000-2001,2005 Silicon Graphics, 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 + */ +#ifndef __XFS_DIR2_H__ +#define __XFS_DIR2_H__ + +struct xfs_bmap_free; +struct xfs_da_args; +struct xfs_inode; +struct xfs_mount; +struct xfs_trans; +struct xfs_dir2_sf_hdr; +struct xfs_dir2_sf_entry; +struct xfs_dir2_data_hdr; +struct xfs_dir2_data_entry; +struct xfs_dir2_data_unused; + +extern struct xfs_name xfs_name_dotdot; + +/* + * directory operations vector for encode/decode routines + */ +struct xfs_dir_ops { + int (*sf_entsize)(struct xfs_dir2_sf_hdr *hdr, int len); + struct xfs_dir2_sf_entry * + (*sf_nextentry)(struct xfs_dir2_sf_hdr *hdr, + struct xfs_dir2_sf_entry *sfep); + __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); + xfs_ino_t (*sf_get_parent_ino)(struct xfs_dir2_sf_hdr *hdr); + void (*sf_put_parent_ino)(struct xfs_dir2_sf_hdr *hdr, + xfs_ino_t ino); + + 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, + __uint8_t ftype); + __be16 * (*data_entry_tag_p)(struct xfs_dir2_data_entry *dep); + struct xfs_dir2_data_free * + (*data_bestfree_p)(struct xfs_dir2_data_hdr *hdr); + + xfs_dir2_data_aoff_t data_dot_offset; + xfs_dir2_data_aoff_t data_dotdot_offset; + xfs_dir2_data_aoff_t data_first_offset; + size_t data_entry_offset; + + struct xfs_dir2_data_entry * + (*data_dot_entry_p)(struct xfs_dir2_data_hdr *hdr); + struct xfs_dir2_data_entry * + (*data_dotdot_entry_p)(struct xfs_dir2_data_hdr *hdr); + struct xfs_dir2_data_entry * + (*data_first_entry_p)(struct xfs_dir2_data_hdr *hdr); + struct xfs_dir2_data_entry * + (*data_entry_p)(struct xfs_dir2_data_hdr *hdr); + struct xfs_dir2_data_unused * + (*data_unused_p)(struct xfs_dir2_data_hdr *hdr); + + int leaf_hdr_size; + void (*leaf_hdr_to_disk)(struct xfs_dir2_leaf *to, + struct xfs_dir3_icleaf_hdr *from); + void (*leaf_hdr_from_disk)(struct xfs_dir3_icleaf_hdr *to, + struct xfs_dir2_leaf *from); + int (*leaf_max_ents)(struct xfs_da_geometry *geo); + struct xfs_dir2_leaf_entry * + (*leaf_ents_p)(struct xfs_dir2_leaf *lp); + + int node_hdr_size; + void (*node_hdr_to_disk)(struct xfs_da_intnode *to, + struct xfs_da3_icnode_hdr *from); + void (*node_hdr_from_disk)(struct xfs_da3_icnode_hdr *to, + struct xfs_da_intnode *from); + struct xfs_da_node_entry * + (*node_tree_p)(struct xfs_da_intnode *dap); + + int free_hdr_size; + void (*free_hdr_to_disk)(struct xfs_dir2_free *to, + struct xfs_dir3_icfree_hdr *from); + void (*free_hdr_from_disk)(struct xfs_dir3_icfree_hdr *to, + struct xfs_dir2_free *from); + int (*free_max_bests)(struct xfs_da_geometry *geo); + __be16 * (*free_bests_p)(struct xfs_dir2_free *free); + xfs_dir2_db_t (*db_to_fdb)(struct xfs_da_geometry *geo, + xfs_dir2_db_t db); + int (*db_to_fdindex)(struct xfs_da_geometry *geo, + xfs_dir2_db_t db); +}; + +extern const struct xfs_dir_ops * + xfs_dir_get_ops(struct xfs_mount *mp, struct xfs_inode *dp); +extern const struct xfs_dir_ops * + xfs_nondir_get_ops(struct xfs_mount *mp, struct xfs_inode *dp); + +/* + * Generic directory interface routines + */ +extern void xfs_dir_startup(void); +extern int xfs_da_mount(struct xfs_mount *mp); +extern void xfs_da_unmount(struct xfs_mount *mp); + +extern int xfs_dir_isempty(struct xfs_inode *dp); +extern int xfs_dir_init(struct xfs_trans *tp, struct xfs_inode *dp, + struct xfs_inode *pdp); +extern int xfs_dir_createname(struct xfs_trans *tp, struct xfs_inode *dp, + struct xfs_name *name, xfs_ino_t inum, + xfs_fsblock_t *first, + struct xfs_bmap_free *flist, xfs_extlen_t tot); +extern int xfs_dir_lookup(struct xfs_trans *tp, struct xfs_inode *dp, + struct xfs_name *name, xfs_ino_t *inum, + struct xfs_name *ci_name); +extern int xfs_dir_removename(struct xfs_trans *tp, struct xfs_inode *dp, + struct xfs_name *name, xfs_ino_t ino, + xfs_fsblock_t *first, + struct xfs_bmap_free *flist, xfs_extlen_t tot); +extern int xfs_dir_replace(struct xfs_trans *tp, struct xfs_inode *dp, + struct xfs_name *name, xfs_ino_t inum, + xfs_fsblock_t *first, + struct xfs_bmap_free *flist, xfs_extlen_t tot); +extern int xfs_dir_canenter(struct xfs_trans *tp, struct xfs_inode *dp, + struct xfs_name *name, uint resblks); + +/* + * Direct call from the bmap code, bypassing the generic directory layer. + */ +extern int xfs_dir2_sf_to_block(struct xfs_da_args *args); + +/* + * Interface routines used by userspace utilities + */ +extern int xfs_dir2_isblock(struct xfs_da_args *args, int *r); +extern int xfs_dir2_isleaf(struct xfs_da_args *args, int *r); +extern int xfs_dir2_shrink_inode(struct xfs_da_args *args, xfs_dir2_db_t db, + struct xfs_buf *bp); + +extern void xfs_dir2_data_freescan(struct xfs_inode *dp, + struct xfs_dir2_data_hdr *hdr, int *loghead); +extern void xfs_dir2_data_log_entry(struct xfs_da_args *args, + struct xfs_buf *bp, struct xfs_dir2_data_entry *dep); +extern void xfs_dir2_data_log_header(struct xfs_da_args *args, + struct xfs_buf *bp); +extern void xfs_dir2_data_log_unused(struct xfs_da_args *args, + struct xfs_buf *bp, struct xfs_dir2_data_unused *dup); +extern void xfs_dir2_data_make_free(struct xfs_da_args *args, + struct xfs_buf *bp, xfs_dir2_data_aoff_t offset, + xfs_dir2_data_aoff_t len, int *needlogp, int *needscanp); +extern void xfs_dir2_data_use_free(struct xfs_da_args *args, + struct xfs_buf *bp, struct xfs_dir2_data_unused *dup, + xfs_dir2_data_aoff_t offset, xfs_dir2_data_aoff_t len, + int *needlogp, int *needscanp); + +extern struct xfs_dir2_data_free *xfs_dir2_data_freefind( + struct xfs_dir2_data_hdr *hdr, struct xfs_dir2_data_free *bf, + struct xfs_dir2_data_unused *dup); + +extern const struct xfs_buf_ops xfs_dir3_block_buf_ops; +extern const struct xfs_buf_ops xfs_dir3_leafn_buf_ops; +extern const struct xfs_buf_ops xfs_dir3_leaf1_buf_ops; +extern const struct xfs_buf_ops xfs_dir3_free_buf_ops; +extern const struct xfs_buf_ops xfs_dir3_data_buf_ops; + +#endif /* __XFS_DIR2_H__ */ |