summaryrefslogtreecommitdiff
path: root/fs/xfs/xfs_dir_leaf.h
diff options
context:
space:
mode:
Diffstat (limited to 'fs/xfs/xfs_dir_leaf.h')
-rw-r--r--fs/xfs/xfs_dir_leaf.h231
1 files changed, 0 insertions, 231 deletions
diff --git a/fs/xfs/xfs_dir_leaf.h b/fs/xfs/xfs_dir_leaf.h
deleted file mode 100644
index eb8cd9a4667f..000000000000
--- a/fs/xfs/xfs_dir_leaf.h
+++ /dev/null
@@ -1,231 +0,0 @@
-/*
- * 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_DIR_LEAF_H__
-#define __XFS_DIR_LEAF_H__
-
-/*
- * Directory layout, internal structure, access macros, etc.
- *
- * Large directories are structured around Btrees where all the data
- * elements are in the leaf nodes. Filenames are hashed into an int,
- * then that int is used as the index into the Btree. Since the hashval
- * of a filename may not be unique, we may have duplicate keys. The
- * internal links in the Btree are logical block offsets into the file.
- */
-
-struct uio;
-struct xfs_bmap_free;
-struct xfs_dabuf;
-struct xfs_da_args;
-struct xfs_da_state;
-struct xfs_da_state_blk;
-struct xfs_dir_put_args;
-struct xfs_inode;
-struct xfs_mount;
-struct xfs_trans;
-
-/*========================================================================
- * Directory Structure when equal to XFS_LBSIZE(mp) bytes.
- *========================================================================*/
-
-/*
- * This is the structure of the leaf nodes in the Btree.
- *
- * Struct leaf_entry's are packed from the top. Names grow from the bottom
- * but are not packed. The freemap contains run-length-encoded entries
- * for the free bytes after the leaf_entry's, but only the N largest such,
- * smaller runs are dropped. When the freemap doesn't show enough space
- * for an allocation, we compact the namelist area and try again. If we
- * still don't have enough space, then we have to split the block.
- *
- * Since we have duplicate hash keys, for each key that matches, compare
- * the actual string. The root and intermediate node search always takes
- * the first-in-the-block key match found, so we should only have to work
- * "forw"ard. If none matches, continue with the "forw"ard leaf nodes
- * until the hash key changes or the filename is found.
- *
- * The parent directory and the self-pointer are explicitly represented
- * (ie: there are entries for "." and "..").
- *
- * Note that the count being a __uint16_t limits us to something like a
- * blocksize of 1.3MB in the face of worst case (short) filenames.
- */
-#define XFS_DIR_LEAF_MAPSIZE 3 /* how many freespace slots */
-
-typedef struct xfs_dir_leaf_map { /* RLE map of free bytes */
- __uint16_t base; /* base of free region */
- __uint16_t size; /* run length of free region */
-} xfs_dir_leaf_map_t;
-
-typedef struct xfs_dir_leaf_hdr { /* constant-structure header block */
- xfs_da_blkinfo_t info; /* block type, links, etc. */
- __uint16_t count; /* count of active leaf_entry's */
- __uint16_t namebytes; /* num bytes of name strings stored */
- __uint16_t firstused; /* first used byte in name area */
- __uint8_t holes; /* != 0 if blk needs compaction */
- __uint8_t pad1;
- xfs_dir_leaf_map_t freemap[XFS_DIR_LEAF_MAPSIZE];
-} xfs_dir_leaf_hdr_t;
-
-typedef struct xfs_dir_leaf_entry { /* sorted on key, not name */
- xfs_dahash_t hashval; /* hash value of name */
- __uint16_t nameidx; /* index into buffer of name */
- __uint8_t namelen; /* length of name string */
- __uint8_t pad2;
-} xfs_dir_leaf_entry_t;
-
-typedef struct xfs_dir_leaf_name {
- xfs_dir_ino_t inumber; /* inode number for this key */
- __uint8_t name[1]; /* name string itself */
-} xfs_dir_leaf_name_t;
-
-typedef struct xfs_dir_leafblock {
- xfs_dir_leaf_hdr_t hdr; /* constant-structure header block */
- xfs_dir_leaf_entry_t entries[1]; /* var sized array */
- xfs_dir_leaf_name_t namelist[1]; /* grows from bottom of buf */
-} xfs_dir_leafblock_t;
-
-/*
- * Length of name for which a 512-byte block filesystem
- * can get a double split.
- */
-#define XFS_DIR_LEAF_CAN_DOUBLE_SPLIT_LEN \
- (512 - (uint)sizeof(xfs_dir_leaf_hdr_t) - \
- (uint)sizeof(xfs_dir_leaf_entry_t) * 2 - \
- (uint)sizeof(xfs_dir_leaf_name_t) * 2 - (MAXNAMELEN - 2) + 1 + 1)
-
-typedef int (*xfs_dir_put_t)(struct xfs_dir_put_args *pa);
-
-typedef union {
- xfs_off_t o; /* offset (cookie) */
- /*
- * Watch the order here (endian-ness dependent).
- */
- struct {
-#ifndef XFS_NATIVE_HOST
- xfs_dahash_t h; /* hash value */
- __uint32_t be; /* block and entry */
-#else
- __uint32_t be; /* block and entry */
- xfs_dahash_t h; /* hash value */
-#endif /* XFS_NATIVE_HOST */
- } s;
-} xfs_dircook_t;
-
-#define XFS_PUT_COOKIE(c,mp,bno,entry,hash) \
- ((c).s.be = XFS_DA_MAKE_BNOENTRY(mp, bno, entry), (c).s.h = (hash))
-
-typedef struct xfs_dir_put_args {
- xfs_dircook_t cook; /* cookie of (next) entry */
- xfs_intino_t ino; /* inode number */
- struct xfs_dirent *dbp; /* buffer pointer */
- char *name; /* directory entry name */
- int namelen; /* length of name */
- int done; /* output: set if value was stored */
- xfs_dir_put_t put; /* put function ptr (i/o) */
- struct uio *uio; /* uio control structure */
-} xfs_dir_put_args_t;
-
-#define XFS_DIR_LEAF_ENTSIZE_BYNAME(len) \
- xfs_dir_leaf_entsize_byname(len)
-static inline int xfs_dir_leaf_entsize_byname(int len)
-{
- return (uint)sizeof(xfs_dir_leaf_name_t)-1 + len;
-}
-
-#define XFS_DIR_LEAF_ENTSIZE_BYENTRY(entry) \
- xfs_dir_leaf_entsize_byentry(entry)
-static inline int xfs_dir_leaf_entsize_byentry(xfs_dir_leaf_entry_t *entry)
-{
- return (uint)sizeof(xfs_dir_leaf_name_t)-1 + (entry)->namelen;
-}
-
-#define XFS_DIR_LEAF_NAMESTRUCT(leafp,offset) \
- xfs_dir_leaf_namestruct(leafp,offset)
-static inline xfs_dir_leaf_name_t *
-xfs_dir_leaf_namestruct(xfs_dir_leafblock_t *leafp, int offset)
-{
- return (xfs_dir_leaf_name_t *)&((char *)(leafp))[offset];
-}
-
-/*========================================================================
- * Function prototypes for the kernel.
- *========================================================================*/
-
-/*
- * Internal routines when dirsize < XFS_LITINO(mp).
- */
-int xfs_dir_shortform_create(struct xfs_da_args *args, xfs_ino_t parent);
-int xfs_dir_shortform_addname(struct xfs_da_args *args);
-int xfs_dir_shortform_lookup(struct xfs_da_args *args);
-int xfs_dir_shortform_to_leaf(struct xfs_da_args *args);
-int xfs_dir_shortform_removename(struct xfs_da_args *args);
-int xfs_dir_shortform_getdents(struct xfs_inode *dp, struct uio *uio, int *eofp,
- struct xfs_dirent *dbp, xfs_dir_put_t put);
-int xfs_dir_shortform_replace(struct xfs_da_args *args);
-
-/*
- * Internal routines when dirsize == XFS_LBSIZE(mp).
- */
-int xfs_dir_leaf_to_node(struct xfs_da_args *args);
-int xfs_dir_leaf_to_shortform(struct xfs_da_args *args);
-
-/*
- * Routines used for growing the Btree.
- */
-int xfs_dir_leaf_split(struct xfs_da_state *state,
- struct xfs_da_state_blk *oldblk,
- struct xfs_da_state_blk *newblk);
-int xfs_dir_leaf_add(struct xfs_dabuf *leaf_buffer,
- struct xfs_da_args *args, int insertion_index);
-int xfs_dir_leaf_addname(struct xfs_da_args *args);
-int xfs_dir_leaf_lookup_int(struct xfs_dabuf *leaf_buffer,
- struct xfs_da_args *args,
- int *index_found_at);
-int xfs_dir_leaf_remove(struct xfs_trans *trans,
- struct xfs_dabuf *leaf_buffer,
- int index_to_remove);
-int xfs_dir_leaf_getdents_int(struct xfs_dabuf *bp, struct xfs_inode *dp,
- xfs_dablk_t bno, struct uio *uio,
- int *eobp, struct xfs_dirent *dbp,
- xfs_dir_put_t put, xfs_daddr_t nextda);
-
-/*
- * Routines used for shrinking the Btree.
- */
-int xfs_dir_leaf_toosmall(struct xfs_da_state *state, int *retval);
-void xfs_dir_leaf_unbalance(struct xfs_da_state *state,
- struct xfs_da_state_blk *drop_blk,
- struct xfs_da_state_blk *save_blk);
-
-/*
- * Utility routines.
- */
-uint xfs_dir_leaf_lasthash(struct xfs_dabuf *bp, int *count);
-int xfs_dir_leaf_order(struct xfs_dabuf *leaf1_bp,
- struct xfs_dabuf *leaf2_bp);
-int xfs_dir_put_dirent64_direct(xfs_dir_put_args_t *pa);
-int xfs_dir_put_dirent64_uio(xfs_dir_put_args_t *pa);
-int xfs_dir_ino_validate(struct xfs_mount *mp, xfs_ino_t ino);
-
-/*
- * Global data.
- */
-extern xfs_dahash_t xfs_dir_hash_dot, xfs_dir_hash_dotdot;
-
-#endif /* __XFS_DIR_LEAF_H__ */