fs/xfs/xfs_dir2_priv.h

   1 /*
   2  * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18 #ifndef __XFS_DIR2_PRIV_H__
  19 #define __XFS_DIR2_PRIV_H__
  20
  21 struct dir_context;
  22
  23 /*
  24  * Directory offset/block conversion functions.
  25  *
  26  * DB blocks here are logical directory block numbers, not filesystem blocks.
  27  */
  28
  29 /*
  30  * Convert dataptr to byte in file space
  31  */
  32 static inline xfs_dir2_off_t
  33 xfs_dir2_dataptr_to_byte(xfs_dir2_dataptr_t dp)
  34 {
  35         return (xfs_dir2_off_t)dp << XFS_DIR2_DATA_ALIGN_LOG;
  36 }
  37
  38 /*
  39  * Convert byte in file space to dataptr.  It had better be aligned.
  40  */
  41 static inline xfs_dir2_dataptr_t
  42 xfs_dir2_byte_to_dataptr(xfs_dir2_off_t by)
  43 {
  44         return (xfs_dir2_dataptr_t)(by >> XFS_DIR2_DATA_ALIGN_LOG);
  45 }
  46
  47 /*
  48  * Convert byte in space to (DB) block
  49  */
  50 static inline xfs_dir2_db_t
  51 xfs_dir2_byte_to_db(struct xfs_da_geometry *geo, xfs_dir2_off_t by)
  52 {
  53         return (xfs_dir2_db_t)(by >> geo->blklog);
  54 }
  55
  56 /*
  57  * Convert dataptr to a block number
  58  */
  59 static inline xfs_dir2_db_t
  60 xfs_dir2_dataptr_to_db(struct xfs_da_geometry *geo, xfs_dir2_dataptr_t dp)
  61 {
  62         return xfs_dir2_byte_to_db(geo, xfs_dir2_dataptr_to_byte(dp));
  63 }
  64
  65 /*
  66  * Convert byte in space to offset in a block
  67  */
  68 static inline xfs_dir2_data_aoff_t
  69 xfs_dir2_byte_to_off(struct xfs_da_geometry *geo, xfs_dir2_off_t by)
  70 {
  71         return (xfs_dir2_data_aoff_t)(by & (geo->blksize - 1));
  72 }
  73
  74 /*
  75  * Convert dataptr to a byte offset in a block
  76  */
  77 static inline xfs_dir2_data_aoff_t
  78 xfs_dir2_dataptr_to_off(struct xfs_da_geometry *geo, xfs_dir2_dataptr_t dp)
  79 {
  80         return xfs_dir2_byte_to_off(geo, xfs_dir2_dataptr_to_byte(dp));
  81 }
  82
  83 /*
  84  * Convert block and offset to byte in space
  85  */
  86 static inline xfs_dir2_off_t
  87 xfs_dir2_db_off_to_byte(struct xfs_da_geometry *geo, xfs_dir2_db_t db,
  88                         xfs_dir2_data_aoff_t o)
  89 {
  90         return ((xfs_dir2_off_t)db << geo->blklog) + o;
  91 }
  92
  93 /*
  94  * Convert block (DB) to block (dablk)
  95  */
  96 static inline xfs_dablk_t
  97 xfs_dir2_db_to_da(struct xfs_da_geometry *geo, xfs_dir2_db_t db)
  98 {
  99         return (xfs_dablk_t)(db << (geo->blklog - geo->fsblog));
 100 }
 101
 102 /*
 103  * Convert byte in space to (DA) block
 104  */
 105 static inline xfs_dablk_t
 106 xfs_dir2_byte_to_da(struct xfs_da_geometry *geo, xfs_dir2_off_t by)
 107 {
 108         return xfs_dir2_db_to_da(geo, xfs_dir2_byte_to_db(geo, by));
 109 }
 110
 111 /*
 112  * Convert block and offset to dataptr
 113  */
 114 static inline xfs_dir2_dataptr_t
 115 xfs_dir2_db_off_to_dataptr(struct xfs_da_geometry *geo, xfs_dir2_db_t db,
 116                            xfs_dir2_data_aoff_t o)
 117 {
 118         return xfs_dir2_byte_to_dataptr(xfs_dir2_db_off_to_byte(geo, db, o));
 119 }
 120
 121 /*
 122  * Convert block (dablk) to block (DB)
 123  */
 124 static inline xfs_dir2_db_t
 125 xfs_dir2_da_to_db(struct xfs_da_geometry *geo, xfs_dablk_t da)
 126 {
 127         return (xfs_dir2_db_t)(da >> (geo->blklog - geo->fsblog));
 128 }
 129
 130 /*
 131  * Convert block (dablk) to byte offset in space
 132  */
 133 static inline xfs_dir2_off_t
 134 xfs_dir2_da_to_byte(struct xfs_da_geometry *geo, xfs_dablk_t da)
 135 {
 136         return xfs_dir2_db_off_to_byte(geo, xfs_dir2_da_to_db(geo, da), 0);
 137 }
 138
 139 /*
 140  * Directory tail pointer accessor functions. Based on block geometry.
 141  */
 142 static inline struct xfs_dir2_block_tail *
 143 xfs_dir2_block_tail_p(struct xfs_da_geometry *geo, struct xfs_dir2_data_hdr *hdr)
 144 {
 145         return ((struct xfs_dir2_block_tail *)
 146                 ((char *)hdr + geo->blksize)) - 1;
 147 }
 148
 149 static inline struct xfs_dir2_leaf_tail *
 150 xfs_dir2_leaf_tail_p(struct xfs_da_geometry *geo, struct xfs_dir2_leaf *lp)
 151 {
 152         return (struct xfs_dir2_leaf_tail *)
 153                 ((char *)lp + geo->blksize -
 154                   sizeof(struct xfs_dir2_leaf_tail));
 155 }
 156
 157 /* xfs_dir2.c */
 158 extern int xfs_dir_ino_validate(struct xfs_mount *mp, xfs_ino_t ino);
 159 extern int xfs_dir2_grow_inode(struct xfs_da_args *args, int space,
 160                                 xfs_dir2_db_t *dbp);
 161 extern int xfs_dir_cilookup_result(struct xfs_da_args *args,
 162                                 const unsigned char *name, int len);
 163
 164 #define S_SHIFT 12
 165 extern const unsigned char xfs_mode_to_ftype[];
 166
 167 extern unsigned char xfs_dir3_get_dtype(struct xfs_mount *mp,
 168                                         __uint8_t filetype);
 169
 170
 171 /* xfs_dir2_block.c */
 172 extern int xfs_dir3_block_read(struct xfs_trans *tp, struct xfs_inode *dp,
 173                                struct xfs_buf **bpp);
 174 extern int xfs_dir2_block_addname(struct xfs_da_args *args);
 175 extern int xfs_dir2_block_lookup(struct xfs_da_args *args);
 176 extern int xfs_dir2_block_removename(struct xfs_da_args *args);
 177 extern int xfs_dir2_block_replace(struct xfs_da_args *args);
 178 extern int xfs_dir2_leaf_to_block(struct xfs_da_args *args,
 179                 struct xfs_buf *lbp, struct xfs_buf *dbp);
 180
 181 /* xfs_dir2_data.c */
 182 #ifdef DEBUG
 183 #define xfs_dir3_data_check(dp,bp) __xfs_dir3_data_check(dp, bp);
 184 #else
 185 #define xfs_dir3_data_check(dp,bp)
 186 #endif
 187
 188 extern int __xfs_dir3_data_check(struct xfs_inode *dp, struct xfs_buf *bp);
 189 extern int xfs_dir3_data_read(struct xfs_trans *tp, struct xfs_inode *dp,
 190                 xfs_dablk_t bno, xfs_daddr_t mapped_bno, struct xfs_buf **bpp);
 191 extern int xfs_dir3_data_readahead(struct xfs_inode *dp, xfs_dablk_t bno,
 192                 xfs_daddr_t mapped_bno);
 193
 194 extern struct xfs_dir2_data_free *
 195 xfs_dir2_data_freeinsert(struct xfs_dir2_data_hdr *hdr,
 196                 struct xfs_dir2_data_free *bf, struct xfs_dir2_data_unused *dup,
 197                 int *loghead);
 198 extern int xfs_dir3_data_init(struct xfs_da_args *args, xfs_dir2_db_t blkno,
 199                 struct xfs_buf **bpp);
 200
 201 /* xfs_dir2_leaf.c */
 202 extern int xfs_dir3_leafn_read(struct xfs_trans *tp, struct xfs_inode *dp,
 203                 xfs_dablk_t fbno, xfs_daddr_t mappedbno, struct xfs_buf **bpp);
 204 extern int xfs_dir2_block_to_leaf(struct xfs_da_args *args,
 205                 struct xfs_buf *dbp);
 206 extern int xfs_dir2_leaf_addname(struct xfs_da_args *args);
 207 extern void xfs_dir3_leaf_compact(struct xfs_da_args *args,
 208                 struct xfs_dir3_icleaf_hdr *leafhdr, struct xfs_buf *bp);
 209 extern void xfs_dir3_leaf_compact_x1(struct xfs_dir3_icleaf_hdr *leafhdr,
 210                 struct xfs_dir2_leaf_entry *ents, int *indexp,
 211                 int *lowstalep, int *highstalep, int *lowlogp, int *highlogp);
 212 extern int xfs_dir3_leaf_get_buf(struct xfs_da_args *args, xfs_dir2_db_t bno,
 213                 struct xfs_buf **bpp, __uint16_t magic);
 214 extern void xfs_dir3_leaf_log_ents(struct xfs_da_args *args,
 215                 struct xfs_buf *bp, int first, int last);
 216 extern void xfs_dir3_leaf_log_header(struct xfs_da_args *args,
 217                 struct xfs_buf *bp);
 218 extern int xfs_dir2_leaf_lookup(struct xfs_da_args *args);
 219 extern int xfs_dir2_leaf_removename(struct xfs_da_args *args);
 220 extern int xfs_dir2_leaf_replace(struct xfs_da_args *args);
 221 extern int xfs_dir2_leaf_search_hash(struct xfs_da_args *args,
 222                 struct xfs_buf *lbp);
 223 extern int xfs_dir2_leaf_trim_data(struct xfs_da_args *args,
 224                 struct xfs_buf *lbp, xfs_dir2_db_t db);
 225 extern struct xfs_dir2_leaf_entry *
 226 xfs_dir3_leaf_find_entry(struct xfs_dir3_icleaf_hdr *leafhdr,
 227                 struct xfs_dir2_leaf_entry *ents, int index, int compact,
 228                 int lowstale, int highstale, int *lfloglow, int *lfloghigh);
 229 extern int xfs_dir2_node_to_leaf(struct xfs_da_state *state);
 230
 231 extern bool xfs_dir3_leaf_check_int(struct xfs_mount *mp, struct xfs_inode *dp,
 232                 struct xfs_dir3_icleaf_hdr *hdr, struct xfs_dir2_leaf *leaf);
 233
 234 /* xfs_dir2_node.c */
 235 extern int xfs_dir2_leaf_to_node(struct xfs_da_args *args,
 236                 struct xfs_buf *lbp);
 237 extern xfs_dahash_t xfs_dir2_leafn_lasthash(struct xfs_inode *dp,
 238                 struct xfs_buf *bp, int *count);
 239 extern int xfs_dir2_leafn_lookup_int(struct xfs_buf *bp,
 240                 struct xfs_da_args *args, int *indexp,
 241                 struct xfs_da_state *state);
 242 extern int xfs_dir2_leafn_order(struct xfs_inode *dp, struct xfs_buf *leaf1_bp,
 243                 struct xfs_buf *leaf2_bp);
 244 extern int xfs_dir2_leafn_split(struct xfs_da_state *state,
 245         struct xfs_da_state_blk *oldblk, struct xfs_da_state_blk *newblk);
 246 extern int xfs_dir2_leafn_toosmall(struct xfs_da_state *state, int *action);
 247 extern void xfs_dir2_leafn_unbalance(struct xfs_da_state *state,
 248                 struct xfs_da_state_blk *drop_blk,
 249                 struct xfs_da_state_blk *save_blk);
 250 extern int xfs_dir2_node_addname(struct xfs_da_args *args);
 251 extern int xfs_dir2_node_lookup(struct xfs_da_args *args);
 252 extern int xfs_dir2_node_removename(struct xfs_da_args *args);
 253 extern int xfs_dir2_node_replace(struct xfs_da_args *args);
 254 extern int xfs_dir2_node_trim_free(struct xfs_da_args *args, xfs_fileoff_t fo,
 255                 int *rvalp);
 256 extern int xfs_dir2_free_read(struct xfs_trans *tp, struct xfs_inode *dp,
 257                 xfs_dablk_t fbno, struct xfs_buf **bpp);
 258
 259 /* xfs_dir2_sf.c */
 260 extern int xfs_dir2_block_sfsize(struct xfs_inode *dp,
 261                 struct xfs_dir2_data_hdr *block, struct xfs_dir2_sf_hdr *sfhp);
 262 extern int xfs_dir2_block_to_sf(struct xfs_da_args *args, struct xfs_buf *bp,
 263                 int size, xfs_dir2_sf_hdr_t *sfhp);
 264 extern int xfs_dir2_sf_addname(struct xfs_da_args *args);
 265 extern int xfs_dir2_sf_create(struct xfs_da_args *args, xfs_ino_t pino);
 266 extern int xfs_dir2_sf_lookup(struct xfs_da_args *args);
 267 extern int xfs_dir2_sf_removename(struct xfs_da_args *args);
 268 extern int xfs_dir2_sf_replace(struct xfs_da_args *args);
 269
 270 /* xfs_dir2_readdir.c */
 271 extern int xfs_readdir(struct xfs_inode *dp, struct dir_context *ctx,
 272                        size_t bufsize);
 273
 274 #endif /* __XFS_DIR2_PRIV_H__ */