--- /dev/null
+/*
+ * 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 filetype conversion tables.
+ */
+#define S_SHIFT 12
+extern const unsigned char xfs_mode_to_ftype[];
+
+/*
+ * 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);
+
+/*
+ * 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;
+
+/*
+ * Directory offset/block conversion functions.
+ *
+ * DB blocks here are logical directory block numbers, not filesystem blocks.
+ */
+
+/*
+ * Convert dataptr to byte in file space
+ */
+static inline xfs_dir2_off_t
+xfs_dir2_dataptr_to_byte(xfs_dir2_dataptr_t dp)
+{
+ return (xfs_dir2_off_t)dp << XFS_DIR2_DATA_ALIGN_LOG;
+}
+
+/*
+ * Convert byte in file space to dataptr. It had better be aligned.
+ */
+static inline xfs_dir2_dataptr_t
+xfs_dir2_byte_to_dataptr(xfs_dir2_off_t by)
+{
+ return (xfs_dir2_dataptr_t)(by >> XFS_DIR2_DATA_ALIGN_LOG);
+}
+
+/*
+ * Convert byte in space to (DB) block
+ */
+static inline xfs_dir2_db_t
+xfs_dir2_byte_to_db(struct xfs_da_geometry *geo, xfs_dir2_off_t by)
+{
+ return (xfs_dir2_db_t)(by >> geo->blklog);
+}
+
+/*
+ * Convert dataptr to a block number
+ */
+static inline xfs_dir2_db_t
+xfs_dir2_dataptr_to_db(struct xfs_da_geometry *geo, xfs_dir2_dataptr_t dp)
+{
+ return xfs_dir2_byte_to_db(geo, xfs_dir2_dataptr_to_byte(dp));
+}
+
+/*
+ * Convert byte in space to offset in a block
+ */
+static inline xfs_dir2_data_aoff_t
+xfs_dir2_byte_to_off(struct xfs_da_geometry *geo, xfs_dir2_off_t by)
+{
+ return (xfs_dir2_data_aoff_t)(by & (geo->blksize - 1));
+}
+
+/*
+ * Convert dataptr to a byte offset in a block
+ */
+static inline xfs_dir2_data_aoff_t
+xfs_dir2_dataptr_to_off(struct xfs_da_geometry *geo, xfs_dir2_dataptr_t dp)
+{
+ return xfs_dir2_byte_to_off(geo, xfs_dir2_dataptr_to_byte(dp));
+}
+
+/*
+ * Convert block and offset to byte in space
+ */
+static inline xfs_dir2_off_t
+xfs_dir2_db_off_to_byte(struct xfs_da_geometry *geo, xfs_dir2_db_t db,
+ xfs_dir2_data_aoff_t o)
+{
+ return ((xfs_dir2_off_t)db << geo->blklog) + o;
+}
+
+/*
+ * Convert block (DB) to block (dablk)
+ */
+static inline xfs_dablk_t
+xfs_dir2_db_to_da(struct xfs_da_geometry *geo, xfs_dir2_db_t db)
+{
+ return (xfs_dablk_t)(db << (geo->blklog - geo->fsblog));
+}
+
+/*
+ * Convert byte in space to (DA) block
+ */
+static inline xfs_dablk_t
+xfs_dir2_byte_to_da(struct xfs_da_geometry *geo, xfs_dir2_off_t by)
+{
+ return xfs_dir2_db_to_da(geo, xfs_dir2_byte_to_db(geo, by));
+}
+
+/*
+ * Convert block and offset to dataptr
+ */
+static inline xfs_dir2_dataptr_t
+xfs_dir2_db_off_to_dataptr(struct xfs_da_geometry *geo, xfs_dir2_db_t db,
+ xfs_dir2_data_aoff_t o)
+{
+ return xfs_dir2_byte_to_dataptr(xfs_dir2_db_off_to_byte(geo, db, o));
+}
+
+/*
+ * Convert block (dablk) to block (DB)
+ */
+static inline xfs_dir2_db_t
+xfs_dir2_da_to_db(struct xfs_da_geometry *geo, xfs_dablk_t da)
+{
+ return (xfs_dir2_db_t)(da >> (geo->blklog - geo->fsblog));
+}
+
+/*
+ * Convert block (dablk) to byte offset in space
+ */
+static inline xfs_dir2_off_t
+xfs_dir2_da_to_byte(struct xfs_da_geometry *geo, xfs_dablk_t da)
+{
+ return xfs_dir2_db_off_to_byte(geo, xfs_dir2_da_to_db(geo, da), 0);
+}
+
+/*
+ * Directory tail pointer accessor functions. Based on block geometry.
+ */
+static inline struct xfs_dir2_block_tail *
+xfs_dir2_block_tail_p(struct xfs_da_geometry *geo, struct xfs_dir2_data_hdr *hdr)
+{
+ return ((struct xfs_dir2_block_tail *)
+ ((char *)hdr + geo->blksize)) - 1;
+}
+
+static inline struct xfs_dir2_leaf_tail *
+xfs_dir2_leaf_tail_p(struct xfs_da_geometry *geo, struct xfs_dir2_leaf *lp)
+{
+ return (struct xfs_dir2_leaf_tail *)
+ ((char *)lp + geo->blksize -
+ sizeof(struct xfs_dir2_leaf_tail));
+}
+
+#endif /* __XFS_DIR2_H__ */
Code Review / kvmfornfv.git / blobdiff