| 1 | /* |
| 2 | * Copyright (c) 2000-2003,2005 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_INODE_H__ |
| 19 | #define __XFS_INODE_H__ |
| 20 | |
| 21 | struct posix_acl; |
| 22 | struct xfs_dinode; |
| 23 | struct xfs_inode; |
| 24 | |
| 25 | /* |
| 26 | * Fork identifiers. |
| 27 | */ |
| 28 | #define XFS_DATA_FORK 0 |
| 29 | #define XFS_ATTR_FORK 1 |
| 30 | |
| 31 | /* |
| 32 | * The following xfs_ext_irec_t struct introduces a second (top) level |
| 33 | * to the in-core extent allocation scheme. These structs are allocated |
| 34 | * in a contiguous block, creating an indirection array where each entry |
| 35 | * (irec) contains a pointer to a buffer of in-core extent records which |
| 36 | * it manages. Each extent buffer is 4k in size, since 4k is the system |
| 37 | * page size on Linux i386 and systems with larger page sizes don't seem |
| 38 | * to gain much, if anything, by using their native page size as the |
| 39 | * extent buffer size. Also, using 4k extent buffers everywhere provides |
| 40 | * a consistent interface for CXFS across different platforms. |
| 41 | * |
| 42 | * There is currently no limit on the number of irec's (extent lists) |
| 43 | * allowed, so heavily fragmented files may require an indirection array |
| 44 | * which spans multiple system pages of memory. The number of extents |
| 45 | * which would require this amount of contiguous memory is very large |
| 46 | * and should not cause problems in the foreseeable future. However, |
| 47 | * if the memory needed for the contiguous array ever becomes a problem, |
| 48 | * it is possible that a third level of indirection may be required. |
| 49 | */ |
| 50 | typedef struct xfs_ext_irec { |
| 51 | xfs_bmbt_rec_host_t *er_extbuf; /* block of extent records */ |
| 52 | xfs_extnum_t er_extoff; /* extent offset in file */ |
| 53 | xfs_extnum_t er_extcount; /* number of extents in page/block */ |
| 54 | } xfs_ext_irec_t; |
| 55 | |
| 56 | /* |
| 57 | * File incore extent information, present for each of data & attr forks. |
| 58 | */ |
| 59 | #define XFS_IEXT_BUFSZ 4096 |
| 60 | #define XFS_LINEAR_EXTS (XFS_IEXT_BUFSZ / (uint)sizeof(xfs_bmbt_rec_t)) |
| 61 | #define XFS_INLINE_EXTS 2 |
| 62 | #define XFS_INLINE_DATA 32 |
| 63 | typedef struct xfs_ifork { |
| 64 | int if_bytes; /* bytes in if_u1 */ |
| 65 | int if_real_bytes; /* bytes allocated in if_u1 */ |
| 66 | struct xfs_btree_block *if_broot; /* file's incore btree root */ |
| 67 | short if_broot_bytes; /* bytes allocated for root */ |
| 68 | unsigned char if_flags; /* per-fork flags */ |
| 69 | union { |
| 70 | xfs_bmbt_rec_host_t *if_extents;/* linear map file exts */ |
| 71 | xfs_ext_irec_t *if_ext_irec; /* irec map file exts */ |
| 72 | char *if_data; /* inline file data */ |
| 73 | } if_u1; |
| 74 | union { |
| 75 | xfs_bmbt_rec_host_t if_inline_ext[XFS_INLINE_EXTS]; |
| 76 | /* very small file extents */ |
| 77 | char if_inline_data[XFS_INLINE_DATA]; |
| 78 | /* very small file data */ |
| 79 | xfs_dev_t if_rdev; /* dev number if special */ |
| 80 | uuid_t if_uuid; /* mount point value */ |
| 81 | } if_u2; |
| 82 | } xfs_ifork_t; |
| 83 | |
| 84 | /* |
| 85 | * Inode location information. Stored in the inode and passed to |
| 86 | * xfs_imap_to_bp() to get a buffer and dinode for a given inode. |
| 87 | */ |
| 88 | struct xfs_imap { |
| 89 | xfs_daddr_t im_blkno; /* starting BB of inode chunk */ |
| 90 | ushort im_len; /* length in BBs of inode chunk */ |
| 91 | ushort im_boffset; /* inode offset in block in bytes */ |
| 92 | }; |
| 93 | |
| 94 | /* |
| 95 | * This is the xfs in-core inode structure. |
| 96 | * Most of the on-disk inode is embedded in the i_d field. |
| 97 | * |
| 98 | * The extent pointers/inline file space, however, are managed |
| 99 | * separately. The memory for this information is pointed to by |
| 100 | * the if_u1 unions depending on the type of the data. |
| 101 | * This is used to linearize the array of extents for fast in-core |
| 102 | * access. This is used until the file's number of extents |
| 103 | * surpasses XFS_MAX_INCORE_EXTENTS, at which point all extent pointers |
| 104 | * are accessed through the buffer cache. |
| 105 | * |
| 106 | * Other state kept in the in-core inode is used for identification, |
| 107 | * locking, transactional updating, etc of the inode. |
| 108 | * |
| 109 | * Generally, we do not want to hold the i_rlock while holding the |
| 110 | * i_ilock. Hierarchy is i_iolock followed by i_rlock. |
| 111 | * |
| 112 | * xfs_iptr_t contains all the inode fields up to and including the |
| 113 | * i_mnext and i_mprev fields, it is used as a marker in the inode |
| 114 | * chain off the mount structure by xfs_sync calls. |
| 115 | */ |
| 116 | |
| 117 | typedef struct xfs_ictimestamp { |
| 118 | __int32_t t_sec; /* timestamp seconds */ |
| 119 | __int32_t t_nsec; /* timestamp nanoseconds */ |
| 120 | } xfs_ictimestamp_t; |
| 121 | |
| 122 | /* |
| 123 | * NOTE: This structure must be kept identical to struct xfs_dinode |
| 124 | * in xfs_dinode.h except for the endianness annotations. |
| 125 | */ |
| 126 | typedef struct xfs_icdinode { |
| 127 | __uint16_t di_magic; /* inode magic # = XFS_DINODE_MAGIC */ |
| 128 | __uint16_t di_mode; /* mode and type of file */ |
| 129 | __int8_t di_version; /* inode version */ |
| 130 | __int8_t di_format; /* format of di_c data */ |
| 131 | __uint16_t di_onlink; /* old number of links to file */ |
| 132 | __uint32_t di_uid; /* owner's user id */ |
| 133 | __uint32_t di_gid; /* owner's group id */ |
| 134 | __uint32_t di_nlink; /* number of links to file */ |
| 135 | __uint16_t di_projid_lo; /* lower part of owner's project id */ |
| 136 | __uint16_t di_projid_hi; /* higher part of owner's project id */ |
| 137 | __uint8_t di_pad[6]; /* unused, zeroed space */ |
| 138 | __uint16_t di_flushiter; /* incremented on flush */ |
| 139 | xfs_ictimestamp_t di_atime; /* time last accessed */ |
| 140 | xfs_ictimestamp_t di_mtime; /* time last modified */ |
| 141 | xfs_ictimestamp_t di_ctime; /* time created/inode modified */ |
| 142 | xfs_fsize_t di_size; /* number of bytes in file */ |
| 143 | xfs_drfsbno_t di_nblocks; /* # of direct & btree blocks used */ |
| 144 | xfs_extlen_t di_extsize; /* basic/minimum extent size for file */ |
| 145 | xfs_extnum_t di_nextents; /* number of extents in data fork */ |
| 146 | xfs_aextnum_t di_anextents; /* number of extents in attribute fork*/ |
| 147 | __uint8_t di_forkoff; /* attr fork offs, <<3 for 64b align */ |
| 148 | __int8_t di_aformat; /* format of attr fork's data */ |
| 149 | __uint32_t di_dmevmask; /* DMIG event mask */ |
| 150 | __uint16_t di_dmstate; /* DMIG state info */ |
| 151 | __uint16_t di_flags; /* random flags, XFS_DIFLAG_... */ |
| 152 | __uint32_t di_gen; /* generation number */ |
| 153 | } xfs_icdinode_t; |
| 154 | |
| 155 | /* |
| 156 | * Flags for xfs_ichgtime(). |
| 157 | */ |
| 158 | #define XFS_ICHGTIME_MOD 0x1 /* data fork modification timestamp */ |
| 159 | #define XFS_ICHGTIME_CHG 0x2 /* inode field change timestamp */ |
| 160 | |
| 161 | /* |
| 162 | * Per-fork incore inode flags. |
| 163 | */ |
| 164 | #define XFS_IFINLINE 0x01 /* Inline data is read in */ |
| 165 | #define XFS_IFEXTENTS 0x02 /* All extent pointers are read in */ |
| 166 | #define XFS_IFBROOT 0x04 /* i_broot points to the bmap b-tree root */ |
| 167 | #define XFS_IFEXTIREC 0x08 /* Indirection array of extent blocks */ |
| 168 | |
| 169 | /* |
| 170 | * Fork handling. |
| 171 | */ |
| 172 | |
| 173 | #define XFS_IFORK_Q(ip) ((ip)->i_d.di_forkoff != 0) |
| 174 | #define XFS_IFORK_BOFF(ip) ((int)((ip)->i_d.di_forkoff << 3)) |
| 175 | |
| 176 | #define XFS_IFORK_PTR(ip,w) \ |
| 177 | ((w) == XFS_DATA_FORK ? \ |
| 178 | &(ip)->i_df : \ |
| 179 | (ip)->i_afp) |
| 180 | #define XFS_IFORK_DSIZE(ip) \ |
| 181 | (XFS_IFORK_Q(ip) ? \ |
| 182 | XFS_IFORK_BOFF(ip) : \ |
| 183 | XFS_LITINO((ip)->i_mount)) |
| 184 | #define XFS_IFORK_ASIZE(ip) \ |
| 185 | (XFS_IFORK_Q(ip) ? \ |
| 186 | XFS_LITINO((ip)->i_mount) - XFS_IFORK_BOFF(ip) : \ |
| 187 | 0) |
| 188 | #define XFS_IFORK_SIZE(ip,w) \ |
| 189 | ((w) == XFS_DATA_FORK ? \ |
| 190 | XFS_IFORK_DSIZE(ip) : \ |
| 191 | XFS_IFORK_ASIZE(ip)) |
| 192 | #define XFS_IFORK_FORMAT(ip,w) \ |
| 193 | ((w) == XFS_DATA_FORK ? \ |
| 194 | (ip)->i_d.di_format : \ |
| 195 | (ip)->i_d.di_aformat) |
| 196 | #define XFS_IFORK_FMT_SET(ip,w,n) \ |
| 197 | ((w) == XFS_DATA_FORK ? \ |
| 198 | ((ip)->i_d.di_format = (n)) : \ |
| 199 | ((ip)->i_d.di_aformat = (n))) |
| 200 | #define XFS_IFORK_NEXTENTS(ip,w) \ |
| 201 | ((w) == XFS_DATA_FORK ? \ |
| 202 | (ip)->i_d.di_nextents : \ |
| 203 | (ip)->i_d.di_anextents) |
| 204 | #define XFS_IFORK_NEXT_SET(ip,w,n) \ |
| 205 | ((w) == XFS_DATA_FORK ? \ |
| 206 | ((ip)->i_d.di_nextents = (n)) : \ |
| 207 | ((ip)->i_d.di_anextents = (n))) |
| 208 | #define XFS_IFORK_MAXEXT(ip, w) \ |
| 209 | (XFS_IFORK_SIZE(ip, w) / sizeof(xfs_bmbt_rec_t)) |
| 210 | |
| 211 | |
| 212 | #ifdef __KERNEL__ |
| 213 | |
| 214 | struct xfs_buf; |
| 215 | struct xfs_bmap_free; |
| 216 | struct xfs_bmbt_irec; |
| 217 | struct xfs_inode_log_item; |
| 218 | struct xfs_mount; |
| 219 | struct xfs_trans; |
| 220 | struct xfs_dquot; |
| 221 | |
| 222 | typedef struct xfs_inode { |
| 223 | /* Inode linking and identification information. */ |
| 224 | struct xfs_mount *i_mount; /* fs mount struct ptr */ |
| 225 | struct xfs_dquot *i_udquot; /* user dquot */ |
| 226 | struct xfs_dquot *i_gdquot; /* group dquot */ |
| 227 | |
| 228 | /* Inode location stuff */ |
| 229 | xfs_ino_t i_ino; /* inode number (agno/agino)*/ |
| 230 | struct xfs_imap i_imap; /* location for xfs_imap() */ |
| 231 | |
| 232 | /* Extent information. */ |
| 233 | xfs_ifork_t *i_afp; /* attribute fork pointer */ |
| 234 | xfs_ifork_t i_df; /* data fork */ |
| 235 | |
| 236 | /* Transaction and locking information. */ |
| 237 | struct xfs_inode_log_item *i_itemp; /* logging information */ |
| 238 | mrlock_t i_lock; /* inode lock */ |
| 239 | mrlock_t i_iolock; /* inode IO lock */ |
| 240 | atomic_t i_pincount; /* inode pin count */ |
| 241 | spinlock_t i_flags_lock; /* inode i_flags lock */ |
| 242 | /* Miscellaneous state. */ |
| 243 | unsigned long i_flags; /* see defined flags below */ |
| 244 | unsigned int i_delayed_blks; /* count of delay alloc blks */ |
| 245 | |
| 246 | xfs_icdinode_t i_d; /* most of ondisk inode */ |
| 247 | |
| 248 | /* VFS inode */ |
| 249 | struct inode i_vnode; /* embedded VFS inode */ |
| 250 | } xfs_inode_t; |
| 251 | |
| 252 | /* Convert from vfs inode to xfs inode */ |
| 253 | static inline struct xfs_inode *XFS_I(struct inode *inode) |
| 254 | { |
| 255 | return container_of(inode, struct xfs_inode, i_vnode); |
| 256 | } |
| 257 | |
| 258 | /* convert from xfs inode to vfs inode */ |
| 259 | static inline struct inode *VFS_I(struct xfs_inode *ip) |
| 260 | { |
| 261 | return &ip->i_vnode; |
| 262 | } |
| 263 | |
| 264 | /* |
| 265 | * For regular files we only update the on-disk filesize when actually |
| 266 | * writing data back to disk. Until then only the copy in the VFS inode |
| 267 | * is uptodate. |
| 268 | */ |
| 269 | static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip) |
| 270 | { |
| 271 | if (S_ISREG(ip->i_d.di_mode)) |
| 272 | return i_size_read(VFS_I(ip)); |
| 273 | return ip->i_d.di_size; |
| 274 | } |
| 275 | |
| 276 | /* |
| 277 | * If this I/O goes past the on-disk inode size update it unless it would |
| 278 | * be past the current in-core inode size. |
| 279 | */ |
| 280 | static inline xfs_fsize_t |
| 281 | xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size) |
| 282 | { |
| 283 | xfs_fsize_t i_size = i_size_read(VFS_I(ip)); |
| 284 | |
| 285 | if (new_size > i_size) |
| 286 | new_size = i_size; |
| 287 | return new_size > ip->i_d.di_size ? new_size : 0; |
| 288 | } |
| 289 | |
| 290 | /* |
| 291 | * i_flags helper functions |
| 292 | */ |
| 293 | static inline void |
| 294 | __xfs_iflags_set(xfs_inode_t *ip, unsigned short flags) |
| 295 | { |
| 296 | ip->i_flags |= flags; |
| 297 | } |
| 298 | |
| 299 | static inline void |
| 300 | xfs_iflags_set(xfs_inode_t *ip, unsigned short flags) |
| 301 | { |
| 302 | spin_lock(&ip->i_flags_lock); |
| 303 | __xfs_iflags_set(ip, flags); |
| 304 | spin_unlock(&ip->i_flags_lock); |
| 305 | } |
| 306 | |
| 307 | static inline void |
| 308 | xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags) |
| 309 | { |
| 310 | spin_lock(&ip->i_flags_lock); |
| 311 | ip->i_flags &= ~flags; |
| 312 | spin_unlock(&ip->i_flags_lock); |
| 313 | } |
| 314 | |
| 315 | static inline int |
| 316 | __xfs_iflags_test(xfs_inode_t *ip, unsigned short flags) |
| 317 | { |
| 318 | return (ip->i_flags & flags); |
| 319 | } |
| 320 | |
| 321 | static inline int |
| 322 | xfs_iflags_test(xfs_inode_t *ip, unsigned short flags) |
| 323 | { |
| 324 | int ret; |
| 325 | spin_lock(&ip->i_flags_lock); |
| 326 | ret = __xfs_iflags_test(ip, flags); |
| 327 | spin_unlock(&ip->i_flags_lock); |
| 328 | return ret; |
| 329 | } |
| 330 | |
| 331 | static inline int |
| 332 | xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags) |
| 333 | { |
| 334 | int ret; |
| 335 | |
| 336 | spin_lock(&ip->i_flags_lock); |
| 337 | ret = ip->i_flags & flags; |
| 338 | if (ret) |
| 339 | ip->i_flags &= ~flags; |
| 340 | spin_unlock(&ip->i_flags_lock); |
| 341 | return ret; |
| 342 | } |
| 343 | |
| 344 | static inline int |
| 345 | xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned short flags) |
| 346 | { |
| 347 | int ret; |
| 348 | |
| 349 | spin_lock(&ip->i_flags_lock); |
| 350 | ret = ip->i_flags & flags; |
| 351 | if (!ret) |
| 352 | ip->i_flags |= flags; |
| 353 | spin_unlock(&ip->i_flags_lock); |
| 354 | return ret; |
| 355 | } |
| 356 | |
| 357 | /* |
| 358 | * Project quota id helpers (previously projid was 16bit only |
| 359 | * and using two 16bit values to hold new 32bit projid was chosen |
| 360 | * to retain compatibility with "old" filesystems). |
| 361 | */ |
| 362 | static inline prid_t |
| 363 | xfs_get_projid(struct xfs_inode *ip) |
| 364 | { |
| 365 | return (prid_t)ip->i_d.di_projid_hi << 16 | ip->i_d.di_projid_lo; |
| 366 | } |
| 367 | |
| 368 | static inline void |
| 369 | xfs_set_projid(struct xfs_inode *ip, |
| 370 | prid_t projid) |
| 371 | { |
| 372 | ip->i_d.di_projid_hi = (__uint16_t) (projid >> 16); |
| 373 | ip->i_d.di_projid_lo = (__uint16_t) (projid & 0xffff); |
| 374 | } |
| 375 | |
| 376 | /* |
| 377 | * In-core inode flags. |
| 378 | */ |
| 379 | #define XFS_IRECLAIM (1 << 0) /* started reclaiming this inode */ |
| 380 | #define XFS_ISTALE (1 << 1) /* inode has been staled */ |
| 381 | #define XFS_IRECLAIMABLE (1 << 2) /* inode can be reclaimed */ |
| 382 | #define XFS_INEW (1 << 3) /* inode has just been allocated */ |
| 383 | #define XFS_IFILESTREAM (1 << 4) /* inode is in a filestream dir. */ |
| 384 | #define XFS_ITRUNCATED (1 << 5) /* truncated down so flush-on-close */ |
| 385 | #define XFS_IDIRTY_RELEASE (1 << 6) /* dirty release already seen */ |
| 386 | #define __XFS_IFLOCK_BIT 7 /* inode is being flushed right now */ |
| 387 | #define XFS_IFLOCK (1 << __XFS_IFLOCK_BIT) |
| 388 | #define __XFS_IPINNED_BIT 8 /* wakeup key for zero pin count */ |
| 389 | #define XFS_IPINNED (1 << __XFS_IPINNED_BIT) |
| 390 | #define XFS_IDONTCACHE (1 << 9) /* don't cache the inode long term */ |
| 391 | |
| 392 | /* |
| 393 | * Per-lifetime flags need to be reset when re-using a reclaimable inode during |
| 394 | * inode lookup. This prevents unintended behaviour on the new inode from |
| 395 | * ocurring. |
| 396 | */ |
| 397 | #define XFS_IRECLAIM_RESET_FLAGS \ |
| 398 | (XFS_IRECLAIMABLE | XFS_IRECLAIM | \ |
| 399 | XFS_IDIRTY_RELEASE | XFS_ITRUNCATED | \ |
| 400 | XFS_IFILESTREAM); |
| 401 | |
| 402 | /* |
| 403 | * Synchronize processes attempting to flush the in-core inode back to disk. |
| 404 | */ |
| 405 | |
| 406 | extern void __xfs_iflock(struct xfs_inode *ip); |
| 407 | |
| 408 | static inline int xfs_iflock_nowait(struct xfs_inode *ip) |
| 409 | { |
| 410 | return !xfs_iflags_test_and_set(ip, XFS_IFLOCK); |
| 411 | } |
| 412 | |
| 413 | static inline void xfs_iflock(struct xfs_inode *ip) |
| 414 | { |
| 415 | if (!xfs_iflock_nowait(ip)) |
| 416 | __xfs_iflock(ip); |
| 417 | } |
| 418 | |
| 419 | static inline void xfs_ifunlock(struct xfs_inode *ip) |
| 420 | { |
| 421 | xfs_iflags_clear(ip, XFS_IFLOCK); |
| 422 | wake_up_bit(&ip->i_flags, __XFS_IFLOCK_BIT); |
| 423 | } |
| 424 | |
| 425 | static inline int xfs_isiflocked(struct xfs_inode *ip) |
| 426 | { |
| 427 | return xfs_iflags_test(ip, XFS_IFLOCK); |
| 428 | } |
| 429 | |
| 430 | /* |
| 431 | * Flags for inode locking. |
| 432 | * Bit ranges: 1<<1 - 1<<16-1 -- iolock/ilock modes (bitfield) |
| 433 | * 1<<16 - 1<<32-1 -- lockdep annotation (integers) |
| 434 | */ |
| 435 | #define XFS_IOLOCK_EXCL (1<<0) |
| 436 | #define XFS_IOLOCK_SHARED (1<<1) |
| 437 | #define XFS_ILOCK_EXCL (1<<2) |
| 438 | #define XFS_ILOCK_SHARED (1<<3) |
| 439 | |
| 440 | #define XFS_LOCK_MASK (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \ |
| 441 | | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED) |
| 442 | |
| 443 | #define XFS_LOCK_FLAGS \ |
| 444 | { XFS_IOLOCK_EXCL, "IOLOCK_EXCL" }, \ |
| 445 | { XFS_IOLOCK_SHARED, "IOLOCK_SHARED" }, \ |
| 446 | { XFS_ILOCK_EXCL, "ILOCK_EXCL" }, \ |
| 447 | { XFS_ILOCK_SHARED, "ILOCK_SHARED" } |
| 448 | |
| 449 | |
| 450 | /* |
| 451 | * Flags for lockdep annotations. |
| 452 | * |
| 453 | * XFS_LOCK_PARENT - for directory operations that require locking a |
| 454 | * parent directory inode and a child entry inode. The parent gets locked |
| 455 | * with this flag so it gets a lockdep subclass of 1 and the child entry |
| 456 | * lock will have a lockdep subclass of 0. |
| 457 | * |
| 458 | * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary |
| 459 | * inodes do not participate in the normal lock order, and thus have their |
| 460 | * own subclasses. |
| 461 | * |
| 462 | * XFS_LOCK_INUMORDER - for locking several inodes at the some time |
| 463 | * with xfs_lock_inodes(). This flag is used as the starting subclass |
| 464 | * and each subsequent lock acquired will increment the subclass by one. |
| 465 | * So the first lock acquired will have a lockdep subclass of 4, the |
| 466 | * second lock will have a lockdep subclass of 5, and so on. It is |
| 467 | * the responsibility of the class builder to shift this to the correct |
| 468 | * portion of the lock_mode lockdep mask. |
| 469 | */ |
| 470 | #define XFS_LOCK_PARENT 1 |
| 471 | #define XFS_LOCK_RTBITMAP 2 |
| 472 | #define XFS_LOCK_RTSUM 3 |
| 473 | #define XFS_LOCK_INUMORDER 4 |
| 474 | |
| 475 | #define XFS_IOLOCK_SHIFT 16 |
| 476 | #define XFS_IOLOCK_PARENT (XFS_LOCK_PARENT << XFS_IOLOCK_SHIFT) |
| 477 | |
| 478 | #define XFS_ILOCK_SHIFT 24 |
| 479 | #define XFS_ILOCK_PARENT (XFS_LOCK_PARENT << XFS_ILOCK_SHIFT) |
| 480 | #define XFS_ILOCK_RTBITMAP (XFS_LOCK_RTBITMAP << XFS_ILOCK_SHIFT) |
| 481 | #define XFS_ILOCK_RTSUM (XFS_LOCK_RTSUM << XFS_ILOCK_SHIFT) |
| 482 | |
| 483 | #define XFS_IOLOCK_DEP_MASK 0x00ff0000 |
| 484 | #define XFS_ILOCK_DEP_MASK 0xff000000 |
| 485 | #define XFS_LOCK_DEP_MASK (XFS_IOLOCK_DEP_MASK | XFS_ILOCK_DEP_MASK) |
| 486 | |
| 487 | #define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) >> XFS_IOLOCK_SHIFT) |
| 488 | #define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT) |
| 489 | |
| 490 | extern struct lock_class_key xfs_iolock_reclaimable; |
| 491 | |
| 492 | /* |
| 493 | * For multiple groups support: if S_ISGID bit is set in the parent |
| 494 | * directory, group of new file is set to that of the parent, and |
| 495 | * new subdirectory gets S_ISGID bit from parent. |
| 496 | */ |
| 497 | #define XFS_INHERIT_GID(pip) \ |
| 498 | (((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \ |
| 499 | ((pip)->i_d.di_mode & S_ISGID)) |
| 500 | |
| 501 | /* |
| 502 | * xfs_iget.c prototypes. |
| 503 | */ |
| 504 | int xfs_iget(struct xfs_mount *, struct xfs_trans *, xfs_ino_t, |
| 505 | uint, uint, xfs_inode_t **); |
| 506 | void xfs_ilock(xfs_inode_t *, uint); |
| 507 | int xfs_ilock_nowait(xfs_inode_t *, uint); |
| 508 | void xfs_iunlock(xfs_inode_t *, uint); |
| 509 | void xfs_ilock_demote(xfs_inode_t *, uint); |
| 510 | int xfs_isilocked(xfs_inode_t *, uint); |
| 511 | uint xfs_ilock_map_shared(xfs_inode_t *); |
| 512 | void xfs_iunlock_map_shared(xfs_inode_t *, uint); |
| 513 | void xfs_inode_free(struct xfs_inode *ip); |
| 514 | |
| 515 | /* |
| 516 | * xfs_inode.c prototypes. |
| 517 | */ |
| 518 | int xfs_ialloc(struct xfs_trans *, xfs_inode_t *, umode_t, |
| 519 | xfs_nlink_t, xfs_dev_t, prid_t, int, |
| 520 | struct xfs_buf **, boolean_t *, xfs_inode_t **); |
| 521 | |
| 522 | uint xfs_ip2xflags(struct xfs_inode *); |
| 523 | uint xfs_dic2xflags(struct xfs_dinode *); |
| 524 | int xfs_ifree(struct xfs_trans *, xfs_inode_t *, |
| 525 | struct xfs_bmap_free *); |
| 526 | int xfs_itruncate_extents(struct xfs_trans **, struct xfs_inode *, |
| 527 | int, xfs_fsize_t); |
| 528 | int xfs_iunlink(struct xfs_trans *, xfs_inode_t *); |
| 529 | |
| 530 | void xfs_iext_realloc(xfs_inode_t *, int, int); |
| 531 | void xfs_iunpin_wait(xfs_inode_t *); |
| 532 | int xfs_iflush(struct xfs_inode *, struct xfs_buf **); |
| 533 | void xfs_lock_inodes(xfs_inode_t **, int, uint); |
| 534 | void xfs_lock_two_inodes(xfs_inode_t *, xfs_inode_t *, uint); |
| 535 | |
| 536 | xfs_extlen_t xfs_get_extsz_hint(struct xfs_inode *ip); |
| 537 | |
| 538 | #define IHOLD(ip) \ |
| 539 | do { \ |
| 540 | ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \ |
| 541 | ihold(VFS_I(ip)); \ |
| 542 | trace_xfs_ihold(ip, _THIS_IP_); \ |
| 543 | } while (0) |
| 544 | |
| 545 | #define IRELE(ip) \ |
| 546 | do { \ |
| 547 | trace_xfs_irele(ip, _THIS_IP_); \ |
| 548 | iput(VFS_I(ip)); \ |
| 549 | } while (0) |
| 550 | |
| 551 | #endif /* __KERNEL__ */ |
| 552 | |
| 553 | /* |
| 554 | * Flags for xfs_iget() |
| 555 | */ |
| 556 | #define XFS_IGET_CREATE 0x1 |
| 557 | #define XFS_IGET_UNTRUSTED 0x2 |
| 558 | #define XFS_IGET_DONTCACHE 0x4 |
| 559 | |
| 560 | int xfs_inotobp(struct xfs_mount *, struct xfs_trans *, |
| 561 | xfs_ino_t, struct xfs_dinode **, |
| 562 | struct xfs_buf **, int *, uint); |
| 563 | int xfs_itobp(struct xfs_mount *, struct xfs_trans *, |
| 564 | struct xfs_inode *, struct xfs_dinode **, |
| 565 | struct xfs_buf **, uint); |
| 566 | int xfs_iread(struct xfs_mount *, struct xfs_trans *, |
| 567 | struct xfs_inode *, uint); |
| 568 | void xfs_dinode_to_disk(struct xfs_dinode *, |
| 569 | struct xfs_icdinode *); |
| 570 | void xfs_idestroy_fork(struct xfs_inode *, int); |
| 571 | void xfs_idata_realloc(struct xfs_inode *, int, int); |
| 572 | void xfs_iroot_realloc(struct xfs_inode *, int, int); |
| 573 | int xfs_iread_extents(struct xfs_trans *, struct xfs_inode *, int); |
| 574 | int xfs_iextents_copy(struct xfs_inode *, xfs_bmbt_rec_t *, int); |
| 575 | |
| 576 | xfs_bmbt_rec_host_t *xfs_iext_get_ext(xfs_ifork_t *, xfs_extnum_t); |
| 577 | void xfs_iext_insert(xfs_inode_t *, xfs_extnum_t, xfs_extnum_t, |
| 578 | xfs_bmbt_irec_t *, int); |
| 579 | void xfs_iext_add(xfs_ifork_t *, xfs_extnum_t, int); |
| 580 | void xfs_iext_add_indirect_multi(xfs_ifork_t *, int, xfs_extnum_t, int); |
| 581 | void xfs_iext_remove(xfs_inode_t *, xfs_extnum_t, int, int); |
| 582 | void xfs_iext_remove_inline(xfs_ifork_t *, xfs_extnum_t, int); |
| 583 | void xfs_iext_remove_direct(xfs_ifork_t *, xfs_extnum_t, int); |
| 584 | void xfs_iext_remove_indirect(xfs_ifork_t *, xfs_extnum_t, int); |
| 585 | void xfs_iext_realloc_direct(xfs_ifork_t *, int); |
| 586 | void xfs_iext_direct_to_inline(xfs_ifork_t *, xfs_extnum_t); |
| 587 | void xfs_iext_inline_to_direct(xfs_ifork_t *, int); |
| 588 | void xfs_iext_destroy(xfs_ifork_t *); |
| 589 | xfs_bmbt_rec_host_t *xfs_iext_bno_to_ext(xfs_ifork_t *, xfs_fileoff_t, int *); |
| 590 | xfs_ext_irec_t *xfs_iext_bno_to_irec(xfs_ifork_t *, xfs_fileoff_t, int *); |
| 591 | xfs_ext_irec_t *xfs_iext_idx_to_irec(xfs_ifork_t *, xfs_extnum_t *, int *, int); |
| 592 | void xfs_iext_irec_init(xfs_ifork_t *); |
| 593 | xfs_ext_irec_t *xfs_iext_irec_new(xfs_ifork_t *, int); |
| 594 | void xfs_iext_irec_remove(xfs_ifork_t *, int); |
| 595 | void xfs_iext_irec_compact(xfs_ifork_t *); |
| 596 | void xfs_iext_irec_compact_pages(xfs_ifork_t *); |
| 597 | void xfs_iext_irec_compact_full(xfs_ifork_t *); |
| 598 | void xfs_iext_irec_update_extoffs(xfs_ifork_t *, int, int); |
| 599 | |
| 600 | #define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount)) |
| 601 | |
| 602 | #if defined(DEBUG) |
| 603 | void xfs_inobp_check(struct xfs_mount *, struct xfs_buf *); |
| 604 | #else |
| 605 | #define xfs_inobp_check(mp, bp) |
| 606 | #endif /* DEBUG */ |
| 607 | |
| 608 | extern struct kmem_zone *xfs_ifork_zone; |
| 609 | extern struct kmem_zone *xfs_inode_zone; |
| 610 | extern struct kmem_zone *xfs_ili_zone; |
| 611 | |
| 612 | #endif /* __XFS_INODE_H__ */ |