Commit | Line | Data |
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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
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 | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
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. | |
1da177e4 | 13 | * |
7b718769 NS |
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 | |
1da177e4 | 17 | */ |
1da177e4 LT |
18 | #ifndef __XFS_BUF_H__ |
19 | #define __XFS_BUF_H__ | |
20 | ||
1da177e4 LT |
21 | #include <linux/list.h> |
22 | #include <linux/types.h> | |
23 | #include <linux/spinlock.h> | |
1da177e4 LT |
24 | #include <linux/mm.h> |
25 | #include <linux/fs.h> | |
c94c2acf | 26 | #include <linux/dax.h> |
1da177e4 LT |
27 | #include <linux/buffer_head.h> |
28 | #include <linux/uio.h> | |
e80dfa19 | 29 | #include <linux/list_lru.h> |
1da177e4 LT |
30 | |
31 | /* | |
32 | * Base types | |
33 | */ | |
34 | ||
ce8e922c NS |
35 | #define XFS_BUF_DADDR_NULL ((xfs_daddr_t) (-1LL)) |
36 | ||
ce8e922c NS |
37 | typedef enum { |
38 | XBRW_READ = 1, /* transfer into target memory */ | |
39 | XBRW_WRITE = 2, /* transfer from target memory */ | |
40 | XBRW_ZERO = 3, /* Zero target memory */ | |
41 | } xfs_buf_rw_t; | |
42 | ||
6fb8a90a CM |
43 | #define XBF_READ (1 << 0) /* buffer intended for reading from device */ |
44 | #define XBF_WRITE (1 << 1) /* buffer intended for writing to device */ | |
45 | #define XBF_READ_AHEAD (1 << 2) /* asynchronous read-ahead */ | |
46 | #define XBF_ASYNC (1 << 4) /* initiator will not wait for completion */ | |
47 | #define XBF_DONE (1 << 5) /* all pages in the buffer uptodate */ | |
48 | #define XBF_STALE (1 << 6) /* buffer has been staled, do not find it */ | |
ac8809f9 | 49 | #define XBF_WRITE_FAIL (1 << 24)/* async writes have failed on this buffer */ |
1d5ae5df CH |
50 | |
51 | /* I/O hints for the BIO layer */ | |
6fb8a90a CM |
52 | #define XBF_SYNCIO (1 << 10)/* treat this buffer as synchronous I/O */ |
53 | #define XBF_FUA (1 << 11)/* force cache write through mode */ | |
54 | #define XBF_FLUSH (1 << 12)/* flush the disk cache before a write */ | |
1da177e4 | 55 | |
807cbbdb | 56 | /* flags used only as arguments to access routines */ |
6fb8a90a CM |
57 | #define XBF_TRYLOCK (1 << 16)/* lock requested, but do not wait */ |
58 | #define XBF_UNMAPPED (1 << 17)/* do not map the buffer */ | |
1da177e4 | 59 | |
807cbbdb | 60 | /* flags used only internally */ |
6fb8a90a CM |
61 | #define _XBF_PAGES (1 << 20)/* backed by refcounted pages */ |
62 | #define _XBF_KMEM (1 << 21)/* backed by heap memory */ | |
63 | #define _XBF_DELWRI_Q (1 << 22)/* buffer on a delwri queue */ | |
64 | #define _XBF_COMPOUND (1 << 23)/* compound buffer */ | |
6ab455ee | 65 | |
807cbbdb | 66 | typedef unsigned int xfs_buf_flags_t; |
1da177e4 | 67 | |
0b1b213f CH |
68 | #define XFS_BUF_FLAGS \ |
69 | { XBF_READ, "READ" }, \ | |
70 | { XBF_WRITE, "WRITE" }, \ | |
1d5ae5df | 71 | { XBF_READ_AHEAD, "READ_AHEAD" }, \ |
0b1b213f CH |
72 | { XBF_ASYNC, "ASYNC" }, \ |
73 | { XBF_DONE, "DONE" }, \ | |
0b1b213f | 74 | { XBF_STALE, "STALE" }, \ |
ac8809f9 | 75 | { XBF_WRITE_FAIL, "WRITE_FAIL" }, \ |
1d5ae5df CH |
76 | { XBF_SYNCIO, "SYNCIO" }, \ |
77 | { XBF_FUA, "FUA" }, \ | |
78 | { XBF_FLUSH, "FLUSH" }, \ | |
6fb8a90a | 79 | { XBF_TRYLOCK, "TRYLOCK" }, /* should never be set */\ |
611c9946 | 80 | { XBF_UNMAPPED, "UNMAPPED" }, /* ditto */\ |
0b1b213f | 81 | { _XBF_PAGES, "PAGES" }, \ |
0e6e847f | 82 | { _XBF_KMEM, "KMEM" }, \ |
cbb7baab | 83 | { _XBF_DELWRI_Q, "DELWRI_Q" }, \ |
a4082357 DC |
84 | { _XBF_COMPOUND, "COMPOUND" } |
85 | ||
ac8809f9 | 86 | |
a4082357 DC |
87 | /* |
88 | * Internal state flags. | |
89 | */ | |
90 | #define XFS_BSTATE_DISPOSE (1 << 0) /* buffer being discarded */ | |
0b1b213f | 91 | |
7c71ee78 ES |
92 | /* |
93 | * The xfs_buftarg contains 2 notions of "sector size" - | |
94 | * | |
95 | * 1) The metadata sector size, which is the minimum unit and | |
96 | * alignment of IO which will be performed by metadata operations. | |
97 | * 2) The device logical sector size | |
98 | * | |
99 | * The first is specified at mkfs time, and is stored on-disk in the | |
100 | * superblock's sb_sectsize. | |
101 | * | |
102 | * The latter is derived from the underlying device, and controls direct IO | |
103 | * alignment constraints. | |
104 | */ | |
1da177e4 | 105 | typedef struct xfs_buftarg { |
ce8e922c NS |
106 | dev_t bt_dev; |
107 | struct block_device *bt_bdev; | |
0e6e847f | 108 | struct backing_dev_info *bt_bdi; |
ebad861b | 109 | struct xfs_mount *bt_mount; |
6da54179 ES |
110 | unsigned int bt_meta_sectorsize; |
111 | size_t bt_meta_sectormask; | |
7c71ee78 ES |
112 | size_t bt_logical_sectorsize; |
113 | size_t bt_logical_sectormask; | |
ce8e922c | 114 | |
ff57ab21 DC |
115 | /* LRU control structures */ |
116 | struct shrinker bt_shrinker; | |
e80dfa19 | 117 | struct list_lru bt_lru; |
1da177e4 LT |
118 | } xfs_buftarg_t; |
119 | ||
1da177e4 | 120 | struct xfs_buf; |
ce8e922c | 121 | typedef void (*xfs_buf_iodone_t)(struct xfs_buf *); |
1da177e4 | 122 | |
c3f8fc73 | 123 | |
ce8e922c | 124 | #define XB_PAGES 2 |
1da177e4 | 125 | |
cbb7baab DC |
126 | struct xfs_buf_map { |
127 | xfs_daddr_t bm_bn; /* block number for I/O */ | |
128 | int bm_len; /* size of I/O */ | |
129 | }; | |
130 | ||
3e85c868 DC |
131 | #define DEFINE_SINGLE_BUF_MAP(map, blkno, numblk) \ |
132 | struct xfs_buf_map (map) = { .bm_bn = (blkno), .bm_len = (numblk) }; | |
133 | ||
1813dd64 DC |
134 | struct xfs_buf_ops { |
135 | void (*verify_read)(struct xfs_buf *); | |
136 | void (*verify_write)(struct xfs_buf *); | |
137 | }; | |
138 | ||
1da177e4 | 139 | typedef struct xfs_buf { |
50f59e8e DC |
140 | /* |
141 | * first cacheline holds all the fields needed for an uncontended cache | |
142 | * hit to be fully processed. The semaphore straddles the cacheline | |
143 | * boundary, but the counter and lock sits on the first cacheline, | |
144 | * which is the only bit that is touched if we hit the semaphore | |
145 | * fast-path on locking. | |
146 | */ | |
147 | struct rb_node b_rbnode; /* rbtree node */ | |
cbb7baab | 148 | xfs_daddr_t b_bn; /* block number of buffer */ |
4e94b71b | 149 | int b_length; /* size of buffer in BBs */ |
50f59e8e | 150 | atomic_t b_hold; /* reference count */ |
430cbeb8 | 151 | atomic_t b_lru_ref; /* lru reclaim ref count */ |
50f59e8e | 152 | xfs_buf_flags_t b_flags; /* status flags */ |
ce8e922c | 153 | struct semaphore b_sema; /* semaphore for lockables */ |
50f59e8e | 154 | |
6fb8a90a CM |
155 | /* |
156 | * concurrent access to b_lru and b_lru_flags are protected by | |
157 | * bt_lru_lock and not by b_sema | |
158 | */ | |
430cbeb8 | 159 | struct list_head b_lru; /* lru list */ |
a4082357 DC |
160 | spinlock_t b_lock; /* internal state lock */ |
161 | unsigned int b_state; /* internal state flags */ | |
61be9c52 | 162 | int b_io_error; /* internal IO error state */ |
ce8e922c NS |
163 | wait_queue_head_t b_waiters; /* unpin waiters */ |
164 | struct list_head b_list; | |
74f75a0c | 165 | struct xfs_perag *b_pag; /* contains rbtree root */ |
ce8e922c | 166 | xfs_buftarg_t *b_target; /* buffer target (device) */ |
ce8e922c | 167 | void *b_addr; /* virtual address of buffer */ |
b29c70f5 BF |
168 | struct work_struct b_ioend_work; |
169 | struct workqueue_struct *b_ioend_wq; /* I/O completion wq */ | |
ce8e922c | 170 | xfs_buf_iodone_t b_iodone; /* I/O completion function */ |
b4dd330b | 171 | struct completion b_iowait; /* queue for I/O waiters */ |
ce8e922c | 172 | void *b_fspriv; |
bf9d9013 | 173 | struct xfs_trans *b_transp; |
ce8e922c NS |
174 | struct page **b_pages; /* array of page pointers */ |
175 | struct page *b_page_array[XB_PAGES]; /* inline pages */ | |
3e85c868 | 176 | struct xfs_buf_map *b_maps; /* compound buffer map */ |
d44d9bc6 | 177 | struct xfs_buf_map __b_map; /* inline compound buffer map */ |
3e85c868 | 178 | int b_map_count; |
aa0e8833 | 179 | int b_io_length; /* IO size in BBs */ |
50f59e8e DC |
180 | atomic_t b_pin_count; /* pin count */ |
181 | atomic_t b_io_remaining; /* #outstanding I/O requests */ | |
182 | unsigned int b_page_count; /* size of page array */ | |
183 | unsigned int b_offset; /* page offset in first page */ | |
2451337d | 184 | int b_error; /* error code on I/O */ |
1813dd64 | 185 | const struct xfs_buf_ops *b_ops; |
cfb02852 | 186 | |
ce8e922c NS |
187 | #ifdef XFS_BUF_LOCK_TRACKING |
188 | int b_last_holder; | |
1da177e4 LT |
189 | #endif |
190 | } xfs_buf_t; | |
191 | ||
1da177e4 | 192 | /* Finding and Reading Buffers */ |
3e85c868 DC |
193 | struct xfs_buf *_xfs_buf_find(struct xfs_buftarg *target, |
194 | struct xfs_buf_map *map, int nmaps, | |
195 | xfs_buf_flags_t flags, struct xfs_buf *new_bp); | |
196 | ||
197 | static inline struct xfs_buf * | |
198 | xfs_incore( | |
199 | struct xfs_buftarg *target, | |
200 | xfs_daddr_t blkno, | |
201 | size_t numblks, | |
202 | xfs_buf_flags_t flags) | |
203 | { | |
204 | DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); | |
205 | return _xfs_buf_find(target, &map, 1, flags, NULL); | |
206 | } | |
207 | ||
208 | struct xfs_buf *_xfs_buf_alloc(struct xfs_buftarg *target, | |
209 | struct xfs_buf_map *map, int nmaps, | |
210 | xfs_buf_flags_t flags); | |
211 | ||
212 | static inline struct xfs_buf * | |
213 | xfs_buf_alloc( | |
214 | struct xfs_buftarg *target, | |
215 | xfs_daddr_t blkno, | |
216 | size_t numblks, | |
217 | xfs_buf_flags_t flags) | |
218 | { | |
219 | DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); | |
220 | return _xfs_buf_alloc(target, &map, 1, flags); | |
221 | } | |
1da177e4 | 222 | |
6dde2707 DC |
223 | struct xfs_buf *xfs_buf_get_map(struct xfs_buftarg *target, |
224 | struct xfs_buf_map *map, int nmaps, | |
225 | xfs_buf_flags_t flags); | |
226 | struct xfs_buf *xfs_buf_read_map(struct xfs_buftarg *target, | |
227 | struct xfs_buf_map *map, int nmaps, | |
1813dd64 DC |
228 | xfs_buf_flags_t flags, |
229 | const struct xfs_buf_ops *ops); | |
6dde2707 | 230 | void xfs_buf_readahead_map(struct xfs_buftarg *target, |
c3f8fc73 | 231 | struct xfs_buf_map *map, int nmaps, |
1813dd64 | 232 | const struct xfs_buf_ops *ops); |
6dde2707 DC |
233 | |
234 | static inline struct xfs_buf * | |
235 | xfs_buf_get( | |
236 | struct xfs_buftarg *target, | |
237 | xfs_daddr_t blkno, | |
238 | size_t numblks, | |
239 | xfs_buf_flags_t flags) | |
240 | { | |
241 | DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); | |
242 | return xfs_buf_get_map(target, &map, 1, flags); | |
243 | } | |
244 | ||
245 | static inline struct xfs_buf * | |
246 | xfs_buf_read( | |
247 | struct xfs_buftarg *target, | |
248 | xfs_daddr_t blkno, | |
249 | size_t numblks, | |
c3f8fc73 | 250 | xfs_buf_flags_t flags, |
1813dd64 | 251 | const struct xfs_buf_ops *ops) |
6dde2707 DC |
252 | { |
253 | DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); | |
1813dd64 | 254 | return xfs_buf_read_map(target, &map, 1, flags, ops); |
6dde2707 DC |
255 | } |
256 | ||
257 | static inline void | |
258 | xfs_buf_readahead( | |
259 | struct xfs_buftarg *target, | |
260 | xfs_daddr_t blkno, | |
c3f8fc73 | 261 | size_t numblks, |
1813dd64 | 262 | const struct xfs_buf_ops *ops) |
6dde2707 DC |
263 | { |
264 | DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); | |
1813dd64 | 265 | return xfs_buf_readahead_map(target, &map, 1, ops); |
6dde2707 | 266 | } |
e70b73f8 DC |
267 | |
268 | struct xfs_buf *xfs_buf_get_empty(struct xfs_buftarg *target, size_t numblks); | |
e70b73f8 DC |
269 | void xfs_buf_set_empty(struct xfs_buf *bp, size_t numblks); |
270 | int xfs_buf_associate_memory(struct xfs_buf *bp, void *mem, size_t length); | |
271 | ||
272 | struct xfs_buf *xfs_buf_get_uncached(struct xfs_buftarg *target, size_t numblks, | |
273 | int flags); | |
ba372674 DC |
274 | int xfs_buf_read_uncached(struct xfs_buftarg *target, xfs_daddr_t daddr, |
275 | size_t numblks, int flags, struct xfs_buf **bpp, | |
276 | const struct xfs_buf_ops *ops); | |
e70b73f8 | 277 | void xfs_buf_hold(struct xfs_buf *bp); |
1da177e4 LT |
278 | |
279 | /* Releasing Buffers */ | |
ce8e922c NS |
280 | extern void xfs_buf_free(xfs_buf_t *); |
281 | extern void xfs_buf_rele(xfs_buf_t *); | |
1da177e4 LT |
282 | |
283 | /* Locking and Unlocking Buffers */ | |
0c842ad4 | 284 | extern int xfs_buf_trylock(xfs_buf_t *); |
ce8e922c NS |
285 | extern void xfs_buf_lock(xfs_buf_t *); |
286 | extern void xfs_buf_unlock(xfs_buf_t *); | |
0c842ad4 CH |
287 | #define xfs_buf_islocked(bp) \ |
288 | ((bp)->b_sema.count <= 0) | |
1da177e4 LT |
289 | |
290 | /* Buffer Read and Write Routines */ | |
c2b006c1 | 291 | extern int xfs_bwrite(struct xfs_buf *bp); |
e8aaba9a | 292 | extern void xfs_buf_ioend(struct xfs_buf *bp); |
ce8e922c | 293 | extern void xfs_buf_ioerror(xfs_buf_t *, int); |
901796af | 294 | extern void xfs_buf_ioerror_alert(struct xfs_buf *, const char *func); |
595bff75 DC |
295 | extern void xfs_buf_submit(struct xfs_buf *bp); |
296 | extern int xfs_buf_submit_wait(struct xfs_buf *bp); | |
b9c48649 | 297 | extern void xfs_buf_iomove(xfs_buf_t *, size_t, size_t, void *, |
ce8e922c | 298 | xfs_buf_rw_t); |
1a1a3e97 CH |
299 | #define xfs_buf_zero(bp, off, len) \ |
300 | xfs_buf_iomove((bp), (off), (len), NULL, XBRW_ZERO) | |
ce8e922c | 301 | |
1da177e4 | 302 | /* Buffer Utility Routines */ |
88ee2df7 | 303 | extern void *xfs_buf_offset(struct xfs_buf *, size_t); |
1da177e4 | 304 | |
1da177e4 | 305 | /* Delayed Write Buffer Routines */ |
43ff2122 CH |
306 | extern bool xfs_buf_delwri_queue(struct xfs_buf *, struct list_head *); |
307 | extern int xfs_buf_delwri_submit(struct list_head *); | |
308 | extern int xfs_buf_delwri_submit_nowait(struct list_head *); | |
1da177e4 LT |
309 | |
310 | /* Buffer Daemon Setup Routines */ | |
ce8e922c NS |
311 | extern int xfs_buf_init(void); |
312 | extern void xfs_buf_terminate(void); | |
1da177e4 | 313 | |
1d5ae5df | 314 | #define XFS_BUF_ZEROFLAGS(bp) \ |
43ff2122 | 315 | ((bp)->b_flags &= ~(XBF_READ|XBF_WRITE|XBF_ASYNC| \ |
ac8809f9 DC |
316 | XBF_SYNCIO|XBF_FUA|XBF_FLUSH| \ |
317 | XBF_WRITE_FAIL)) | |
ce8e922c | 318 | |
430cbeb8 | 319 | void xfs_buf_stale(struct xfs_buf *bp); |
0cadda1c CH |
320 | #define XFS_BUF_UNSTALE(bp) ((bp)->b_flags &= ~XBF_STALE) |
321 | #define XFS_BUF_ISSTALE(bp) ((bp)->b_flags & XBF_STALE) | |
1da177e4 | 322 | |
ce8e922c NS |
323 | #define XFS_BUF_DONE(bp) ((bp)->b_flags |= XBF_DONE) |
324 | #define XFS_BUF_UNDONE(bp) ((bp)->b_flags &= ~XBF_DONE) | |
325 | #define XFS_BUF_ISDONE(bp) ((bp)->b_flags & XBF_DONE) | |
326 | ||
ce8e922c NS |
327 | #define XFS_BUF_ASYNC(bp) ((bp)->b_flags |= XBF_ASYNC) |
328 | #define XFS_BUF_UNASYNC(bp) ((bp)->b_flags &= ~XBF_ASYNC) | |
329 | #define XFS_BUF_ISASYNC(bp) ((bp)->b_flags & XBF_ASYNC) | |
330 | ||
ce8e922c NS |
331 | #define XFS_BUF_READ(bp) ((bp)->b_flags |= XBF_READ) |
332 | #define XFS_BUF_UNREAD(bp) ((bp)->b_flags &= ~XBF_READ) | |
333 | #define XFS_BUF_ISREAD(bp) ((bp)->b_flags & XBF_READ) | |
334 | ||
335 | #define XFS_BUF_WRITE(bp) ((bp)->b_flags |= XBF_WRITE) | |
336 | #define XFS_BUF_UNWRITE(bp) ((bp)->b_flags &= ~XBF_WRITE) | |
337 | #define XFS_BUF_ISWRITE(bp) ((bp)->b_flags & XBF_WRITE) | |
338 | ||
cbb7baab DC |
339 | /* |
340 | * These macros use the IO block map rather than b_bn. b_bn is now really | |
341 | * just for the buffer cache index for cached buffers. As IO does not use b_bn | |
342 | * anymore, uncached buffers do not use b_bn at all and hence must modify the IO | |
343 | * map directly. Uncached buffers are not allowed to be discontiguous, so this | |
344 | * is safe to do. | |
345 | * | |
346 | * In future, uncached buffers will pass the block number directly to the io | |
347 | * request function and hence these macros will go away at that point. | |
348 | */ | |
d44d9bc6 MT |
349 | #define XFS_BUF_ADDR(bp) ((bp)->b_maps[0].bm_bn) |
350 | #define XFS_BUF_SET_ADDR(bp, bno) ((bp)->b_maps[0].bm_bn = (xfs_daddr_t)(bno)) | |
ce8e922c | 351 | |
38f23232 | 352 | static inline void xfs_buf_set_ref(struct xfs_buf *bp, int lru_ref) |
821eb21d DC |
353 | { |
354 | atomic_set(&bp->b_lru_ref, lru_ref); | |
355 | } | |
ce8e922c | 356 | |
811e64c7 CS |
357 | static inline int xfs_buf_ispinned(struct xfs_buf *bp) |
358 | { | |
359 | return atomic_read(&bp->b_pin_count); | |
360 | } | |
ce8e922c | 361 | |
ce8e922c | 362 | static inline void xfs_buf_relse(xfs_buf_t *bp) |
1da177e4 | 363 | { |
bfc60177 | 364 | xfs_buf_unlock(bp); |
ce8e922c | 365 | xfs_buf_rele(bp); |
1da177e4 LT |
366 | } |
367 | ||
51582170 ES |
368 | static inline int |
369 | xfs_buf_verify_cksum(struct xfs_buf *bp, unsigned long cksum_offset) | |
370 | { | |
371 | return xfs_verify_cksum(bp->b_addr, BBTOB(bp->b_length), | |
372 | cksum_offset); | |
373 | } | |
374 | ||
f1dbcd7e ES |
375 | static inline void |
376 | xfs_buf_update_cksum(struct xfs_buf *bp, unsigned long cksum_offset) | |
377 | { | |
378 | xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length), | |
379 | cksum_offset); | |
380 | } | |
381 | ||
1da177e4 LT |
382 | /* |
383 | * Handling of buftargs. | |
384 | */ | |
ebad861b | 385 | extern xfs_buftarg_t *xfs_alloc_buftarg(struct xfs_mount *, |
34dcefd7 | 386 | struct block_device *); |
c141b292 | 387 | extern void xfs_free_buftarg(struct xfs_mount *, struct xfs_buftarg *); |
1da177e4 | 388 | extern void xfs_wait_buftarg(xfs_buftarg_t *); |
a96c4151 | 389 | extern int xfs_setsize_buftarg(xfs_buftarg_t *, unsigned int); |
d808f617 | 390 | |
ce8e922c NS |
391 | #define xfs_getsize_buftarg(buftarg) block_size((buftarg)->bt_bdev) |
392 | #define xfs_readonly_buftarg(buftarg) bdev_read_only((buftarg)->bt_bdev) | |
393 | ||
1da177e4 | 394 | #endif /* __XFS_BUF_H__ */ |