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> | |
24 | #include <asm/system.h> | |
25 | #include <linux/mm.h> | |
26 | #include <linux/fs.h> | |
27 | #include <linux/buffer_head.h> | |
28 | #include <linux/uio.h> | |
29 | ||
30 | /* | |
31 | * Base types | |
32 | */ | |
33 | ||
ce8e922c NS |
34 | #define XFS_BUF_DADDR_NULL ((xfs_daddr_t) (-1LL)) |
35 | ||
36 | #define xfs_buf_ctob(pp) ((pp) * PAGE_CACHE_SIZE) | |
37 | #define xfs_buf_btoc(dd) (((dd) + PAGE_CACHE_SIZE-1) >> PAGE_CACHE_SHIFT) | |
38 | #define xfs_buf_btoct(dd) ((dd) >> PAGE_CACHE_SHIFT) | |
39 | #define xfs_buf_poff(aa) ((aa) & ~PAGE_CACHE_MASK) | |
40 | ||
41 | typedef enum { | |
42 | XBRW_READ = 1, /* transfer into target memory */ | |
43 | XBRW_WRITE = 2, /* transfer from target memory */ | |
44 | XBRW_ZERO = 3, /* Zero target memory */ | |
45 | } xfs_buf_rw_t; | |
46 | ||
807cbbdb CH |
47 | #define XBF_READ (1 << 0) /* buffer intended for reading from device */ |
48 | #define XBF_WRITE (1 << 1) /* buffer intended for writing to device */ | |
49 | #define XBF_MAPPED (1 << 2) /* buffer mapped (b_addr valid) */ | |
50 | #define XBF_ASYNC (1 << 4) /* initiator will not wait for completion */ | |
51 | #define XBF_DONE (1 << 5) /* all pages in the buffer uptodate */ | |
52 | #define XBF_DELWRI (1 << 6) /* buffer has dirty pages */ | |
53 | #define XBF_STALE (1 << 7) /* buffer has been staled, do not find it */ | |
54 | #define XBF_FS_MANAGED (1 << 8) /* filesystem controls freeing memory */ | |
55 | #define XBF_ORDERED (1 << 11)/* use ordered writes */ | |
56 | #define XBF_READ_AHEAD (1 << 12)/* asynchronous read-ahead */ | |
57 | #define XBF_LOG_BUFFER (1 << 13)/* this is a buffer used for the log */ | |
1da177e4 | 58 | |
807cbbdb CH |
59 | /* flags used only as arguments to access routines */ |
60 | #define XBF_LOCK (1 << 14)/* lock requested */ | |
61 | #define XBF_TRYLOCK (1 << 15)/* lock requested, but do not wait */ | |
62 | #define XBF_DONT_BLOCK (1 << 16)/* do not block in current thread */ | |
1da177e4 | 63 | |
807cbbdb CH |
64 | /* flags used only internally */ |
65 | #define _XBF_PAGE_CACHE (1 << 17)/* backed by pagecache */ | |
66 | #define _XBF_PAGES (1 << 18)/* backed by refcounted pages */ | |
67 | #define _XBF_RUN_QUEUES (1 << 19)/* run block device task queue */ | |
68 | #define _XBF_DELWRI_Q (1 << 21)/* buffer on delwri queue */ | |
6ab455ee | 69 | |
807cbbdb CH |
70 | /* |
71 | * Special flag for supporting metadata blocks smaller than a FSB. | |
72 | * | |
73 | * In this case we can have multiple xfs_buf_t on a single page and | |
74 | * need to lock out concurrent xfs_buf_t readers as they only | |
75 | * serialise access to the buffer. | |
76 | * | |
77 | * If the FSB size >= PAGE_CACHE_SIZE case, we have no serialisation | |
78 | * between reads of the page. Hence we can have one thread read the | |
79 | * page and modify it, but then race with another thread that thinks | |
80 | * the page is not up-to-date and hence reads it again. | |
81 | * | |
82 | * The result is that the first modifcation to the page is lost. | |
83 | * This sort of AGF/AGI reading race can happen when unlinking inodes | |
84 | * that require truncation and results in the AGI unlinked list | |
85 | * modifications being lost. | |
86 | */ | |
87 | #define _XBF_PAGE_LOCKED (1 << 22) | |
88 | ||
89 | /* | |
90 | * If we try a barrier write, but it fails we have to communicate | |
91 | * this to the upper layers. Unfortunately b_error gets overwritten | |
92 | * when the buffer is re-issued so we have to add another flag to | |
93 | * keep this information. | |
94 | */ | |
95 | #define _XFS_BARRIER_FAILED (1 << 23) | |
73f6aa4d | 96 | |
807cbbdb | 97 | typedef unsigned int xfs_buf_flags_t; |
1da177e4 | 98 | |
0b1b213f CH |
99 | #define XFS_BUF_FLAGS \ |
100 | { XBF_READ, "READ" }, \ | |
101 | { XBF_WRITE, "WRITE" }, \ | |
102 | { XBF_MAPPED, "MAPPED" }, \ | |
103 | { XBF_ASYNC, "ASYNC" }, \ | |
104 | { XBF_DONE, "DONE" }, \ | |
105 | { XBF_DELWRI, "DELWRI" }, \ | |
106 | { XBF_STALE, "STALE" }, \ | |
107 | { XBF_FS_MANAGED, "FS_MANAGED" }, \ | |
108 | { XBF_ORDERED, "ORDERED" }, \ | |
109 | { XBF_READ_AHEAD, "READ_AHEAD" }, \ | |
110 | { XBF_LOCK, "LOCK" }, /* should never be set */\ | |
111 | { XBF_TRYLOCK, "TRYLOCK" }, /* ditto */\ | |
112 | { XBF_DONT_BLOCK, "DONT_BLOCK" }, /* ditto */\ | |
113 | { _XBF_PAGE_CACHE, "PAGE_CACHE" }, \ | |
114 | { _XBF_PAGES, "PAGES" }, \ | |
115 | { _XBF_RUN_QUEUES, "RUN_QUEUES" }, \ | |
116 | { _XBF_DELWRI_Q, "DELWRI_Q" }, \ | |
117 | { _XBF_PAGE_LOCKED, "PAGE_LOCKED" }, \ | |
118 | { _XFS_BARRIER_FAILED, "BARRIER_FAILED" } | |
119 | ||
120 | ||
ce8e922c | 121 | typedef enum { |
5e6a07df DC |
122 | XBT_FORCE_SLEEP = 0, |
123 | XBT_FORCE_FLUSH = 1, | |
ce8e922c | 124 | } xfs_buftarg_flags_t; |
1da177e4 LT |
125 | |
126 | typedef struct xfs_bufhash { | |
127 | struct list_head bh_list; | |
128 | spinlock_t bh_lock; | |
129 | } xfs_bufhash_t; | |
130 | ||
131 | typedef struct xfs_buftarg { | |
ce8e922c NS |
132 | dev_t bt_dev; |
133 | struct block_device *bt_bdev; | |
134 | struct address_space *bt_mapping; | |
135 | unsigned int bt_bsize; | |
136 | unsigned int bt_sshift; | |
137 | size_t bt_smask; | |
138 | ||
139 | /* per device buffer hash table */ | |
1da177e4 LT |
140 | uint bt_hashshift; |
141 | xfs_bufhash_t *bt_hash; | |
a6867a68 DC |
142 | |
143 | /* per device delwri queue */ | |
144 | struct task_struct *bt_task; | |
145 | struct list_head bt_list; | |
146 | struct list_head bt_delwrite_queue; | |
147 | spinlock_t bt_delwrite_lock; | |
ce8e922c | 148 | unsigned long bt_flags; |
1da177e4 LT |
149 | } xfs_buftarg_t; |
150 | ||
151 | /* | |
ce8e922c | 152 | * xfs_buf_t: Buffer structure for pagecache-based buffers |
1da177e4 | 153 | * |
ce8e922c NS |
154 | * This buffer structure is used by the pagecache buffer management routines |
155 | * to refer to an assembly of pages forming a logical buffer. | |
156 | * | |
157 | * The buffer structure is used on a temporary basis only, and discarded when | |
158 | * released. The real data storage is recorded in the pagecache. Buffers are | |
1da177e4 LT |
159 | * hashed to the block device on which the file system resides. |
160 | */ | |
161 | ||
162 | struct xfs_buf; | |
ce8e922c NS |
163 | typedef void (*xfs_buf_iodone_t)(struct xfs_buf *); |
164 | typedef void (*xfs_buf_relse_t)(struct xfs_buf *); | |
165 | typedef int (*xfs_buf_bdstrat_t)(struct xfs_buf *); | |
1da177e4 | 166 | |
ce8e922c | 167 | #define XB_PAGES 2 |
1da177e4 LT |
168 | |
169 | typedef struct xfs_buf { | |
ce8e922c NS |
170 | struct semaphore b_sema; /* semaphore for lockables */ |
171 | unsigned long b_queuetime; /* time buffer was queued */ | |
172 | atomic_t b_pin_count; /* pin count */ | |
173 | wait_queue_head_t b_waiters; /* unpin waiters */ | |
174 | struct list_head b_list; | |
175 | xfs_buf_flags_t b_flags; /* status flags */ | |
176 | struct list_head b_hash_list; /* hash table list */ | |
177 | xfs_bufhash_t *b_hash; /* hash table list start */ | |
178 | xfs_buftarg_t *b_target; /* buffer target (device) */ | |
179 | atomic_t b_hold; /* reference count */ | |
180 | xfs_daddr_t b_bn; /* block number for I/O */ | |
181 | xfs_off_t b_file_offset; /* offset in file */ | |
182 | size_t b_buffer_length;/* size of buffer in bytes */ | |
183 | size_t b_count_desired;/* desired transfer size */ | |
184 | void *b_addr; /* virtual address of buffer */ | |
185 | struct work_struct b_iodone_work; | |
186 | atomic_t b_io_remaining; /* #outstanding I/O requests */ | |
187 | xfs_buf_iodone_t b_iodone; /* I/O completion function */ | |
188 | xfs_buf_relse_t b_relse; /* releasing function */ | |
b4dd330b | 189 | struct completion b_iowait; /* queue for I/O waiters */ |
ce8e922c NS |
190 | void *b_fspriv; |
191 | void *b_fspriv2; | |
15ac08a8 | 192 | struct xfs_mount *b_mount; |
ce8e922c | 193 | unsigned short b_error; /* error code on I/O */ |
ce8e922c NS |
194 | unsigned int b_page_count; /* size of page array */ |
195 | unsigned int b_offset; /* page offset in first page */ | |
196 | struct page **b_pages; /* array of page pointers */ | |
197 | struct page *b_page_array[XB_PAGES]; /* inline pages */ | |
198 | #ifdef XFS_BUF_LOCK_TRACKING | |
199 | int b_last_holder; | |
1da177e4 LT |
200 | #endif |
201 | } xfs_buf_t; | |
202 | ||
203 | ||
204 | /* Finding and Reading Buffers */ | |
ce8e922c NS |
205 | extern xfs_buf_t *_xfs_buf_find(xfs_buftarg_t *, xfs_off_t, size_t, |
206 | xfs_buf_flags_t, xfs_buf_t *); | |
1da177e4 | 207 | #define xfs_incore(buftarg,blkno,len,lockit) \ |
ce8e922c | 208 | _xfs_buf_find(buftarg, blkno ,len, lockit, NULL) |
1da177e4 | 209 | |
6ad112bf | 210 | extern xfs_buf_t *xfs_buf_get(xfs_buftarg_t *, xfs_off_t, size_t, |
ce8e922c | 211 | xfs_buf_flags_t); |
6ad112bf | 212 | extern xfs_buf_t *xfs_buf_read(xfs_buftarg_t *, xfs_off_t, size_t, |
ce8e922c | 213 | xfs_buf_flags_t); |
1da177e4 | 214 | |
ce8e922c | 215 | extern xfs_buf_t *xfs_buf_get_empty(size_t, xfs_buftarg_t *); |
686865f7 | 216 | extern xfs_buf_t *xfs_buf_get_uncached(struct xfs_buftarg *, size_t, int); |
ce8e922c NS |
217 | extern int xfs_buf_associate_memory(xfs_buf_t *, void *, size_t); |
218 | extern void xfs_buf_hold(xfs_buf_t *); | |
219 | extern void xfs_buf_readahead(xfs_buftarg_t *, xfs_off_t, size_t, | |
220 | xfs_buf_flags_t); | |
5adc94c2 DC |
221 | struct xfs_buf *xfs_buf_read_uncached(struct xfs_mount *mp, |
222 | struct xfs_buftarg *target, | |
223 | xfs_daddr_t daddr, size_t length, int flags); | |
1da177e4 LT |
224 | |
225 | /* Releasing Buffers */ | |
ce8e922c NS |
226 | extern void xfs_buf_free(xfs_buf_t *); |
227 | extern void xfs_buf_rele(xfs_buf_t *); | |
1da177e4 LT |
228 | |
229 | /* Locking and Unlocking Buffers */ | |
ce8e922c NS |
230 | extern int xfs_buf_cond_lock(xfs_buf_t *); |
231 | extern int xfs_buf_lock_value(xfs_buf_t *); | |
232 | extern void xfs_buf_lock(xfs_buf_t *); | |
233 | extern void xfs_buf_unlock(xfs_buf_t *); | |
1da177e4 LT |
234 | |
235 | /* Buffer Read and Write Routines */ | |
64e0bc7d | 236 | extern int xfs_bwrite(struct xfs_mount *mp, struct xfs_buf *bp); |
5d765b97 | 237 | extern void xfs_bdwrite(void *mp, xfs_buf_t *bp); |
4e23471a CH |
238 | |
239 | extern void xfsbdstrat(struct xfs_mount *, struct xfs_buf *); | |
240 | extern int xfs_bdstrat_cb(struct xfs_buf *); | |
241 | ||
ce8e922c NS |
242 | extern void xfs_buf_ioend(xfs_buf_t *, int); |
243 | extern void xfs_buf_ioerror(xfs_buf_t *, int); | |
ce8e922c NS |
244 | extern int xfs_buf_iorequest(xfs_buf_t *); |
245 | extern int xfs_buf_iowait(xfs_buf_t *); | |
b9c48649 | 246 | extern void xfs_buf_iomove(xfs_buf_t *, size_t, size_t, void *, |
ce8e922c NS |
247 | xfs_buf_rw_t); |
248 | ||
ce8e922c | 249 | static inline int xfs_buf_geterror(xfs_buf_t *bp) |
1da177e4 | 250 | { |
ce8e922c | 251 | return bp ? bp->b_error : ENOMEM; |
1da177e4 LT |
252 | } |
253 | ||
254 | /* Buffer Utility Routines */ | |
ce8e922c | 255 | extern xfs_caddr_t xfs_buf_offset(xfs_buf_t *, size_t); |
1da177e4 | 256 | |
1da177e4 | 257 | /* Delayed Write Buffer Routines */ |
ce8e922c | 258 | extern void xfs_buf_delwri_dequeue(xfs_buf_t *); |
d808f617 | 259 | extern void xfs_buf_delwri_promote(xfs_buf_t *); |
1da177e4 LT |
260 | |
261 | /* Buffer Daemon Setup Routines */ | |
ce8e922c NS |
262 | extern int xfs_buf_init(void); |
263 | extern void xfs_buf_terminate(void); | |
1da177e4 | 264 | |
ce8e922c NS |
265 | #define xfs_buf_target_name(target) \ |
266 | ({ char __b[BDEVNAME_SIZE]; bdevname((target)->bt_bdev, __b); __b; }) | |
1da177e4 LT |
267 | |
268 | ||
ce8e922c | 269 | #define XFS_BUF_BFLAGS(bp) ((bp)->b_flags) |
f5faad79 NS |
270 | #define XFS_BUF_ZEROFLAGS(bp) ((bp)->b_flags &= \ |
271 | ~(XBF_READ|XBF_WRITE|XBF_ASYNC|XBF_DELWRI|XBF_ORDERED)) | |
ce8e922c | 272 | |
0cadda1c CH |
273 | #define XFS_BUF_STALE(bp) ((bp)->b_flags |= XBF_STALE) |
274 | #define XFS_BUF_UNSTALE(bp) ((bp)->b_flags &= ~XBF_STALE) | |
275 | #define XFS_BUF_ISSTALE(bp) ((bp)->b_flags & XBF_STALE) | |
ce8e922c NS |
276 | #define XFS_BUF_SUPER_STALE(bp) do { \ |
277 | XFS_BUF_STALE(bp); \ | |
278 | xfs_buf_delwri_dequeue(bp); \ | |
279 | XFS_BUF_DONE(bp); \ | |
280 | } while (0) | |
1da177e4 | 281 | |
ce8e922c NS |
282 | #define XFS_BUF_UNMANAGE(bp) ((bp)->b_flags &= ~XBF_FS_MANAGED) |
283 | ||
284 | #define XFS_BUF_DELAYWRITE(bp) ((bp)->b_flags |= XBF_DELWRI) | |
285 | #define XFS_BUF_UNDELAYWRITE(bp) xfs_buf_delwri_dequeue(bp) | |
286 | #define XFS_BUF_ISDELAYWRITE(bp) ((bp)->b_flags & XBF_DELWRI) | |
287 | ||
288 | #define XFS_BUF_ERROR(bp,no) xfs_buf_ioerror(bp,no) | |
289 | #define XFS_BUF_GETERROR(bp) xfs_buf_geterror(bp) | |
290 | #define XFS_BUF_ISERROR(bp) (xfs_buf_geterror(bp) ? 1 : 0) | |
291 | ||
292 | #define XFS_BUF_DONE(bp) ((bp)->b_flags |= XBF_DONE) | |
293 | #define XFS_BUF_UNDONE(bp) ((bp)->b_flags &= ~XBF_DONE) | |
294 | #define XFS_BUF_ISDONE(bp) ((bp)->b_flags & XBF_DONE) | |
295 | ||
296 | #define XFS_BUF_BUSY(bp) do { } while (0) | |
297 | #define XFS_BUF_UNBUSY(bp) do { } while (0) | |
298 | #define XFS_BUF_ISBUSY(bp) (1) | |
299 | ||
300 | #define XFS_BUF_ASYNC(bp) ((bp)->b_flags |= XBF_ASYNC) | |
301 | #define XFS_BUF_UNASYNC(bp) ((bp)->b_flags &= ~XBF_ASYNC) | |
302 | #define XFS_BUF_ISASYNC(bp) ((bp)->b_flags & XBF_ASYNC) | |
303 | ||
304 | #define XFS_BUF_ORDERED(bp) ((bp)->b_flags |= XBF_ORDERED) | |
305 | #define XFS_BUF_UNORDERED(bp) ((bp)->b_flags &= ~XBF_ORDERED) | |
306 | #define XFS_BUF_ISORDERED(bp) ((bp)->b_flags & XBF_ORDERED) | |
ce8e922c NS |
307 | |
308 | #define XFS_BUF_HOLD(bp) xfs_buf_hold(bp) | |
309 | #define XFS_BUF_READ(bp) ((bp)->b_flags |= XBF_READ) | |
310 | #define XFS_BUF_UNREAD(bp) ((bp)->b_flags &= ~XBF_READ) | |
311 | #define XFS_BUF_ISREAD(bp) ((bp)->b_flags & XBF_READ) | |
312 | ||
313 | #define XFS_BUF_WRITE(bp) ((bp)->b_flags |= XBF_WRITE) | |
314 | #define XFS_BUF_UNWRITE(bp) ((bp)->b_flags &= ~XBF_WRITE) | |
315 | #define XFS_BUF_ISWRITE(bp) ((bp)->b_flags & XBF_WRITE) | |
316 | ||
ce8e922c NS |
317 | #define XFS_BUF_IODONE_FUNC(bp) ((bp)->b_iodone) |
318 | #define XFS_BUF_SET_IODONE_FUNC(bp, func) ((bp)->b_iodone = (func)) | |
319 | #define XFS_BUF_CLR_IODONE_FUNC(bp) ((bp)->b_iodone = NULL) | |
ce8e922c NS |
320 | |
321 | #define XFS_BUF_FSPRIVATE(bp, type) ((type)(bp)->b_fspriv) | |
322 | #define XFS_BUF_SET_FSPRIVATE(bp, val) ((bp)->b_fspriv = (void*)(val)) | |
323 | #define XFS_BUF_FSPRIVATE2(bp, type) ((type)(bp)->b_fspriv2) | |
324 | #define XFS_BUF_SET_FSPRIVATE2(bp, val) ((bp)->b_fspriv2 = (void*)(val)) | |
ce8e922c NS |
325 | #define XFS_BUF_SET_START(bp) do { } while (0) |
326 | #define XFS_BUF_SET_BRELSE_FUNC(bp, func) ((bp)->b_relse = (func)) | |
327 | ||
328 | #define XFS_BUF_PTR(bp) (xfs_caddr_t)((bp)->b_addr) | |
329 | #define XFS_BUF_SET_PTR(bp, val, cnt) xfs_buf_associate_memory(bp, val, cnt) | |
330 | #define XFS_BUF_ADDR(bp) ((bp)->b_bn) | |
331 | #define XFS_BUF_SET_ADDR(bp, bno) ((bp)->b_bn = (xfs_daddr_t)(bno)) | |
332 | #define XFS_BUF_OFFSET(bp) ((bp)->b_file_offset) | |
333 | #define XFS_BUF_SET_OFFSET(bp, off) ((bp)->b_file_offset = (off)) | |
334 | #define XFS_BUF_COUNT(bp) ((bp)->b_count_desired) | |
335 | #define XFS_BUF_SET_COUNT(bp, cnt) ((bp)->b_count_desired = (cnt)) | |
336 | #define XFS_BUF_SIZE(bp) ((bp)->b_buffer_length) | |
337 | #define XFS_BUF_SET_SIZE(bp, cnt) ((bp)->b_buffer_length = (cnt)) | |
338 | ||
339 | #define XFS_BUF_SET_VTYPE_REF(bp, type, ref) do { } while (0) | |
340 | #define XFS_BUF_SET_VTYPE(bp, type) do { } while (0) | |
341 | #define XFS_BUF_SET_REF(bp, ref) do { } while (0) | |
342 | ||
4d16e924 | 343 | #define XFS_BUF_ISPINNED(bp) atomic_read(&((bp)->b_pin_count)) |
ce8e922c NS |
344 | |
345 | #define XFS_BUF_VALUSEMA(bp) xfs_buf_lock_value(bp) | |
346 | #define XFS_BUF_CPSEMA(bp) (xfs_buf_cond_lock(bp) == 0) | |
347 | #define XFS_BUF_VSEMA(bp) xfs_buf_unlock(bp) | |
348 | #define XFS_BUF_PSEMA(bp,x) xfs_buf_lock(bp) | |
b4dd330b | 349 | #define XFS_BUF_FINISH_IOWAIT(bp) complete(&bp->b_iowait); |
ce8e922c NS |
350 | |
351 | #define XFS_BUF_SET_TARGET(bp, target) ((bp)->b_target = (target)) | |
352 | #define XFS_BUF_TARGET(bp) ((bp)->b_target) | |
353 | #define XFS_BUFTARG_NAME(target) xfs_buf_target_name(target) | |
354 | ||
ce8e922c | 355 | static inline void xfs_buf_relse(xfs_buf_t *bp) |
1da177e4 | 356 | { |
ce8e922c NS |
357 | if (!bp->b_relse) |
358 | xfs_buf_unlock(bp); | |
359 | xfs_buf_rele(bp); | |
1da177e4 LT |
360 | } |
361 | ||
ce8e922c | 362 | #define xfs_biodone(bp) xfs_buf_ioend(bp, 0) |
1da177e4 | 363 | |
ce8e922c NS |
364 | #define xfs_biomove(bp, off, len, data, rw) \ |
365 | xfs_buf_iomove((bp), (off), (len), (data), \ | |
0cadda1c | 366 | ((rw) == XBF_WRITE) ? XBRW_WRITE : XBRW_READ) |
1da177e4 | 367 | |
ce8e922c NS |
368 | #define xfs_biozero(bp, off, len) \ |
369 | xfs_buf_iomove((bp), (off), (len), NULL, XBRW_ZERO) | |
1da177e4 | 370 | |
ce8e922c | 371 | #define xfs_iowait(bp) xfs_buf_iowait(bp) |
1da177e4 LT |
372 | |
373 | #define xfs_baread(target, rablkno, ralen) \ | |
ce8e922c | 374 | xfs_buf_readahead((target), (rablkno), (ralen), XBF_DONT_BLOCK) |
1da177e4 LT |
375 | |
376 | ||
377 | /* | |
378 | * Handling of buftargs. | |
379 | */ | |
e2a07812 | 380 | extern xfs_buftarg_t *xfs_alloc_buftarg(struct block_device *, int, const char *); |
c141b292 | 381 | extern void xfs_free_buftarg(struct xfs_mount *, struct xfs_buftarg *); |
1da177e4 LT |
382 | extern void xfs_wait_buftarg(xfs_buftarg_t *); |
383 | extern int xfs_setsize_buftarg(xfs_buftarg_t *, unsigned int, unsigned int); | |
1da177e4 | 384 | extern int xfs_flush_buftarg(xfs_buftarg_t *, int); |
d808f617 | 385 | |
e6a0e9cd TS |
386 | #ifdef CONFIG_KDB_MODULES |
387 | extern struct list_head *xfs_get_buftarg_list(void); | |
388 | #endif | |
1da177e4 | 389 | |
ce8e922c NS |
390 | #define xfs_getsize_buftarg(buftarg) block_size((buftarg)->bt_bdev) |
391 | #define xfs_readonly_buftarg(buftarg) bdev_read_only((buftarg)->bt_bdev) | |
392 | ||
393 | #define xfs_binval(buftarg) xfs_flush_buftarg(buftarg, 1) | |
394 | #define XFS_bflush(buftarg) xfs_flush_buftarg(buftarg, 1) | |
1da177e4 LT |
395 | |
396 | #endif /* __XFS_BUF_H__ */ |