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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 | ||
47 | typedef enum { | |
48 | XBF_READ = (1 << 0), /* buffer intended for reading from device */ | |
49 | XBF_WRITE = (1 << 1), /* buffer intended for writing to device */ | |
50 | XBF_MAPPED = (1 << 2), /* buffer mapped (b_addr valid) */ | |
51 | XBF_ASYNC = (1 << 4), /* initiator will not wait for completion */ | |
52 | XBF_DONE = (1 << 5), /* all pages in the buffer uptodate */ | |
53 | XBF_DELWRI = (1 << 6), /* buffer has dirty pages */ | |
54 | XBF_STALE = (1 << 7), /* buffer has been staled, do not find it */ | |
55 | XBF_FS_MANAGED = (1 << 8), /* filesystem controls freeing memory */ | |
56 | XBF_ORDERED = (1 << 11), /* use ordered writes */ | |
57 | XBF_READ_AHEAD = (1 << 12), /* asynchronous read-ahead */ | |
1da177e4 LT |
58 | |
59 | /* flags used only as arguments to access routines */ | |
ce8e922c NS |
60 | XBF_LOCK = (1 << 14), /* lock requested */ |
61 | XBF_TRYLOCK = (1 << 15), /* lock requested, but do not wait */ | |
62 | XBF_DONT_BLOCK = (1 << 16), /* do not block in current thread */ | |
1da177e4 LT |
63 | |
64 | /* flags used only internally */ | |
ce8e922c | 65 | _XBF_PAGE_CACHE = (1 << 17),/* backed by pagecache */ |
1fa40b01 | 66 | _XBF_PAGES = (1 << 18), /* backed by refcounted pages */ |
ce8e922c NS |
67 | _XBF_RUN_QUEUES = (1 << 19),/* run block device task queue */ |
68 | _XBF_DELWRI_Q = (1 << 21), /* buffer on delwri queue */ | |
69 | } xfs_buf_flags_t; | |
1da177e4 | 70 | |
ce8e922c | 71 | typedef enum { |
5e6a07df DC |
72 | XBT_FORCE_SLEEP = 0, |
73 | XBT_FORCE_FLUSH = 1, | |
ce8e922c | 74 | } xfs_buftarg_flags_t; |
1da177e4 LT |
75 | |
76 | typedef struct xfs_bufhash { | |
77 | struct list_head bh_list; | |
78 | spinlock_t bh_lock; | |
79 | } xfs_bufhash_t; | |
80 | ||
81 | typedef struct xfs_buftarg { | |
ce8e922c NS |
82 | dev_t bt_dev; |
83 | struct block_device *bt_bdev; | |
84 | struct address_space *bt_mapping; | |
85 | unsigned int bt_bsize; | |
86 | unsigned int bt_sshift; | |
87 | size_t bt_smask; | |
88 | ||
89 | /* per device buffer hash table */ | |
1da177e4 LT |
90 | uint bt_hashmask; |
91 | uint bt_hashshift; | |
92 | xfs_bufhash_t *bt_hash; | |
a6867a68 DC |
93 | |
94 | /* per device delwri queue */ | |
95 | struct task_struct *bt_task; | |
96 | struct list_head bt_list; | |
97 | struct list_head bt_delwrite_queue; | |
98 | spinlock_t bt_delwrite_lock; | |
ce8e922c | 99 | unsigned long bt_flags; |
1da177e4 LT |
100 | } xfs_buftarg_t; |
101 | ||
102 | /* | |
ce8e922c | 103 | * xfs_buf_t: Buffer structure for pagecache-based buffers |
1da177e4 | 104 | * |
ce8e922c NS |
105 | * This buffer structure is used by the pagecache buffer management routines |
106 | * to refer to an assembly of pages forming a logical buffer. | |
107 | * | |
108 | * The buffer structure is used on a temporary basis only, and discarded when | |
109 | * released. The real data storage is recorded in the pagecache. Buffers are | |
1da177e4 LT |
110 | * hashed to the block device on which the file system resides. |
111 | */ | |
112 | ||
113 | struct xfs_buf; | |
ce8e922c NS |
114 | typedef void (*xfs_buf_iodone_t)(struct xfs_buf *); |
115 | typedef void (*xfs_buf_relse_t)(struct xfs_buf *); | |
116 | typedef int (*xfs_buf_bdstrat_t)(struct xfs_buf *); | |
1da177e4 | 117 | |
ce8e922c | 118 | #define XB_PAGES 2 |
1da177e4 LT |
119 | |
120 | typedef struct xfs_buf { | |
ce8e922c NS |
121 | struct semaphore b_sema; /* semaphore for lockables */ |
122 | unsigned long b_queuetime; /* time buffer was queued */ | |
123 | atomic_t b_pin_count; /* pin count */ | |
124 | wait_queue_head_t b_waiters; /* unpin waiters */ | |
125 | struct list_head b_list; | |
126 | xfs_buf_flags_t b_flags; /* status flags */ | |
127 | struct list_head b_hash_list; /* hash table list */ | |
128 | xfs_bufhash_t *b_hash; /* hash table list start */ | |
129 | xfs_buftarg_t *b_target; /* buffer target (device) */ | |
130 | atomic_t b_hold; /* reference count */ | |
131 | xfs_daddr_t b_bn; /* block number for I/O */ | |
132 | xfs_off_t b_file_offset; /* offset in file */ | |
133 | size_t b_buffer_length;/* size of buffer in bytes */ | |
134 | size_t b_count_desired;/* desired transfer size */ | |
135 | void *b_addr; /* virtual address of buffer */ | |
136 | struct work_struct b_iodone_work; | |
137 | atomic_t b_io_remaining; /* #outstanding I/O requests */ | |
138 | xfs_buf_iodone_t b_iodone; /* I/O completion function */ | |
139 | xfs_buf_relse_t b_relse; /* releasing function */ | |
140 | xfs_buf_bdstrat_t b_strat; /* pre-write function */ | |
141 | struct semaphore b_iodonesema; /* Semaphore for I/O waiters */ | |
142 | void *b_fspriv; | |
143 | void *b_fspriv2; | |
144 | void *b_fspriv3; | |
145 | unsigned short b_error; /* error code on I/O */ | |
ce8e922c NS |
146 | unsigned int b_page_count; /* size of page array */ |
147 | unsigned int b_offset; /* page offset in first page */ | |
148 | struct page **b_pages; /* array of page pointers */ | |
149 | struct page *b_page_array[XB_PAGES]; /* inline pages */ | |
150 | #ifdef XFS_BUF_LOCK_TRACKING | |
151 | int b_last_holder; | |
1da177e4 LT |
152 | #endif |
153 | } xfs_buf_t; | |
154 | ||
155 | ||
156 | /* Finding and Reading Buffers */ | |
ce8e922c NS |
157 | extern xfs_buf_t *_xfs_buf_find(xfs_buftarg_t *, xfs_off_t, size_t, |
158 | xfs_buf_flags_t, xfs_buf_t *); | |
1da177e4 | 159 | #define xfs_incore(buftarg,blkno,len,lockit) \ |
ce8e922c | 160 | _xfs_buf_find(buftarg, blkno ,len, lockit, NULL) |
1da177e4 | 161 | |
ce8e922c NS |
162 | extern xfs_buf_t *xfs_buf_get_flags(xfs_buftarg_t *, xfs_off_t, size_t, |
163 | xfs_buf_flags_t); | |
1da177e4 | 164 | #define xfs_buf_get(target, blkno, len, flags) \ |
ce8e922c | 165 | xfs_buf_get_flags((target), (blkno), (len), XBF_LOCK | XBF_MAPPED) |
1da177e4 | 166 | |
ce8e922c NS |
167 | extern xfs_buf_t *xfs_buf_read_flags(xfs_buftarg_t *, xfs_off_t, size_t, |
168 | xfs_buf_flags_t); | |
1da177e4 | 169 | #define xfs_buf_read(target, blkno, len, flags) \ |
ce8e922c | 170 | xfs_buf_read_flags((target), (blkno), (len), XBF_LOCK | XBF_MAPPED) |
1da177e4 | 171 | |
ce8e922c NS |
172 | extern xfs_buf_t *xfs_buf_get_empty(size_t, xfs_buftarg_t *); |
173 | extern xfs_buf_t *xfs_buf_get_noaddr(size_t, xfs_buftarg_t *); | |
174 | extern int xfs_buf_associate_memory(xfs_buf_t *, void *, size_t); | |
175 | extern void xfs_buf_hold(xfs_buf_t *); | |
176 | extern void xfs_buf_readahead(xfs_buftarg_t *, xfs_off_t, size_t, | |
177 | xfs_buf_flags_t); | |
1da177e4 LT |
178 | |
179 | /* Releasing Buffers */ | |
ce8e922c NS |
180 | extern void xfs_buf_free(xfs_buf_t *); |
181 | extern void xfs_buf_rele(xfs_buf_t *); | |
1da177e4 LT |
182 | |
183 | /* Locking and Unlocking Buffers */ | |
ce8e922c NS |
184 | extern int xfs_buf_cond_lock(xfs_buf_t *); |
185 | extern int xfs_buf_lock_value(xfs_buf_t *); | |
186 | extern void xfs_buf_lock(xfs_buf_t *); | |
187 | extern void xfs_buf_unlock(xfs_buf_t *); | |
1da177e4 LT |
188 | |
189 | /* Buffer Read and Write Routines */ | |
ce8e922c NS |
190 | extern void xfs_buf_ioend(xfs_buf_t *, int); |
191 | extern void xfs_buf_ioerror(xfs_buf_t *, int); | |
192 | extern int xfs_buf_iostart(xfs_buf_t *, xfs_buf_flags_t); | |
193 | extern int xfs_buf_iorequest(xfs_buf_t *); | |
194 | extern int xfs_buf_iowait(xfs_buf_t *); | |
195 | extern void xfs_buf_iomove(xfs_buf_t *, size_t, size_t, xfs_caddr_t, | |
196 | xfs_buf_rw_t); | |
197 | ||
198 | static inline int xfs_buf_iostrategy(xfs_buf_t *bp) | |
1da177e4 | 199 | { |
ce8e922c | 200 | return bp->b_strat ? bp->b_strat(bp) : xfs_buf_iorequest(bp); |
1da177e4 LT |
201 | } |
202 | ||
ce8e922c | 203 | static inline int xfs_buf_geterror(xfs_buf_t *bp) |
1da177e4 | 204 | { |
ce8e922c | 205 | return bp ? bp->b_error : ENOMEM; |
1da177e4 LT |
206 | } |
207 | ||
208 | /* Buffer Utility Routines */ | |
ce8e922c | 209 | extern xfs_caddr_t xfs_buf_offset(xfs_buf_t *, size_t); |
1da177e4 LT |
210 | |
211 | /* Pinning Buffer Storage in Memory */ | |
ce8e922c NS |
212 | extern void xfs_buf_pin(xfs_buf_t *); |
213 | extern void xfs_buf_unpin(xfs_buf_t *); | |
214 | extern int xfs_buf_ispin(xfs_buf_t *); | |
1da177e4 LT |
215 | |
216 | /* Delayed Write Buffer Routines */ | |
ce8e922c | 217 | extern void xfs_buf_delwri_dequeue(xfs_buf_t *); |
1da177e4 LT |
218 | |
219 | /* Buffer Daemon Setup Routines */ | |
ce8e922c NS |
220 | extern int xfs_buf_init(void); |
221 | extern void xfs_buf_terminate(void); | |
1da177e4 | 222 | |
ce8e922c NS |
223 | #ifdef XFS_BUF_TRACE |
224 | extern ktrace_t *xfs_buf_trace_buf; | |
225 | extern void xfs_buf_trace(xfs_buf_t *, char *, void *, void *); | |
1da177e4 | 226 | #else |
ce8e922c | 227 | #define xfs_buf_trace(bp,id,ptr,ra) do { } while (0) |
1da177e4 LT |
228 | #endif |
229 | ||
ce8e922c NS |
230 | #define xfs_buf_target_name(target) \ |
231 | ({ char __b[BDEVNAME_SIZE]; bdevname((target)->bt_bdev, __b); __b; }) | |
1da177e4 LT |
232 | |
233 | ||
ce8e922c NS |
234 | #define XFS_B_ASYNC XBF_ASYNC |
235 | #define XFS_B_DELWRI XBF_DELWRI | |
236 | #define XFS_B_READ XBF_READ | |
237 | #define XFS_B_WRITE XBF_WRITE | |
238 | #define XFS_B_STALE XBF_STALE | |
1da177e4 | 239 | |
ce8e922c NS |
240 | #define XFS_BUF_TRYLOCK XBF_TRYLOCK |
241 | #define XFS_INCORE_TRYLOCK XBF_TRYLOCK | |
242 | #define XFS_BUF_LOCK XBF_LOCK | |
243 | #define XFS_BUF_MAPPED XBF_MAPPED | |
1da177e4 | 244 | |
ce8e922c NS |
245 | #define BUF_BUSY XBF_DONT_BLOCK |
246 | ||
247 | #define XFS_BUF_BFLAGS(bp) ((bp)->b_flags) | |
f5faad79 NS |
248 | #define XFS_BUF_ZEROFLAGS(bp) ((bp)->b_flags &= \ |
249 | ~(XBF_READ|XBF_WRITE|XBF_ASYNC|XBF_DELWRI|XBF_ORDERED)) | |
ce8e922c NS |
250 | |
251 | #define XFS_BUF_STALE(bp) ((bp)->b_flags |= XFS_B_STALE) | |
252 | #define XFS_BUF_UNSTALE(bp) ((bp)->b_flags &= ~XFS_B_STALE) | |
253 | #define XFS_BUF_ISSTALE(bp) ((bp)->b_flags & XFS_B_STALE) | |
254 | #define XFS_BUF_SUPER_STALE(bp) do { \ | |
255 | XFS_BUF_STALE(bp); \ | |
256 | xfs_buf_delwri_dequeue(bp); \ | |
257 | XFS_BUF_DONE(bp); \ | |
258 | } while (0) | |
1da177e4 | 259 | |
ce8e922c NS |
260 | #define XFS_BUF_MANAGE XBF_FS_MANAGED |
261 | #define XFS_BUF_UNMANAGE(bp) ((bp)->b_flags &= ~XBF_FS_MANAGED) | |
262 | ||
263 | #define XFS_BUF_DELAYWRITE(bp) ((bp)->b_flags |= XBF_DELWRI) | |
264 | #define XFS_BUF_UNDELAYWRITE(bp) xfs_buf_delwri_dequeue(bp) | |
265 | #define XFS_BUF_ISDELAYWRITE(bp) ((bp)->b_flags & XBF_DELWRI) | |
266 | ||
267 | #define XFS_BUF_ERROR(bp,no) xfs_buf_ioerror(bp,no) | |
268 | #define XFS_BUF_GETERROR(bp) xfs_buf_geterror(bp) | |
269 | #define XFS_BUF_ISERROR(bp) (xfs_buf_geterror(bp) ? 1 : 0) | |
270 | ||
271 | #define XFS_BUF_DONE(bp) ((bp)->b_flags |= XBF_DONE) | |
272 | #define XFS_BUF_UNDONE(bp) ((bp)->b_flags &= ~XBF_DONE) | |
273 | #define XFS_BUF_ISDONE(bp) ((bp)->b_flags & XBF_DONE) | |
274 | ||
275 | #define XFS_BUF_BUSY(bp) do { } while (0) | |
276 | #define XFS_BUF_UNBUSY(bp) do { } while (0) | |
277 | #define XFS_BUF_ISBUSY(bp) (1) | |
278 | ||
279 | #define XFS_BUF_ASYNC(bp) ((bp)->b_flags |= XBF_ASYNC) | |
280 | #define XFS_BUF_UNASYNC(bp) ((bp)->b_flags &= ~XBF_ASYNC) | |
281 | #define XFS_BUF_ISASYNC(bp) ((bp)->b_flags & XBF_ASYNC) | |
282 | ||
283 | #define XFS_BUF_ORDERED(bp) ((bp)->b_flags |= XBF_ORDERED) | |
284 | #define XFS_BUF_UNORDERED(bp) ((bp)->b_flags &= ~XBF_ORDERED) | |
285 | #define XFS_BUF_ISORDERED(bp) ((bp)->b_flags & XBF_ORDERED) | |
286 | ||
287 | #define XFS_BUF_SHUT(bp) do { } while (0) | |
288 | #define XFS_BUF_UNSHUT(bp) do { } while (0) | |
289 | #define XFS_BUF_ISSHUT(bp) (0) | |
290 | ||
291 | #define XFS_BUF_HOLD(bp) xfs_buf_hold(bp) | |
292 | #define XFS_BUF_READ(bp) ((bp)->b_flags |= XBF_READ) | |
293 | #define XFS_BUF_UNREAD(bp) ((bp)->b_flags &= ~XBF_READ) | |
294 | #define XFS_BUF_ISREAD(bp) ((bp)->b_flags & XBF_READ) | |
295 | ||
296 | #define XFS_BUF_WRITE(bp) ((bp)->b_flags |= XBF_WRITE) | |
297 | #define XFS_BUF_UNWRITE(bp) ((bp)->b_flags &= ~XBF_WRITE) | |
298 | #define XFS_BUF_ISWRITE(bp) ((bp)->b_flags & XBF_WRITE) | |
299 | ||
ce8e922c NS |
300 | #define XFS_BUF_IODONE_FUNC(bp) ((bp)->b_iodone) |
301 | #define XFS_BUF_SET_IODONE_FUNC(bp, func) ((bp)->b_iodone = (func)) | |
302 | #define XFS_BUF_CLR_IODONE_FUNC(bp) ((bp)->b_iodone = NULL) | |
303 | #define XFS_BUF_SET_BDSTRAT_FUNC(bp, func) ((bp)->b_strat = (func)) | |
304 | #define XFS_BUF_CLR_BDSTRAT_FUNC(bp) ((bp)->b_strat = NULL) | |
305 | ||
306 | #define XFS_BUF_FSPRIVATE(bp, type) ((type)(bp)->b_fspriv) | |
307 | #define XFS_BUF_SET_FSPRIVATE(bp, val) ((bp)->b_fspriv = (void*)(val)) | |
308 | #define XFS_BUF_FSPRIVATE2(bp, type) ((type)(bp)->b_fspriv2) | |
309 | #define XFS_BUF_SET_FSPRIVATE2(bp, val) ((bp)->b_fspriv2 = (void*)(val)) | |
310 | #define XFS_BUF_FSPRIVATE3(bp, type) ((type)(bp)->b_fspriv3) | |
311 | #define XFS_BUF_SET_FSPRIVATE3(bp, val) ((bp)->b_fspriv3 = (void*)(val)) | |
312 | #define XFS_BUF_SET_START(bp) do { } while (0) | |
313 | #define XFS_BUF_SET_BRELSE_FUNC(bp, func) ((bp)->b_relse = (func)) | |
314 | ||
315 | #define XFS_BUF_PTR(bp) (xfs_caddr_t)((bp)->b_addr) | |
316 | #define XFS_BUF_SET_PTR(bp, val, cnt) xfs_buf_associate_memory(bp, val, cnt) | |
317 | #define XFS_BUF_ADDR(bp) ((bp)->b_bn) | |
318 | #define XFS_BUF_SET_ADDR(bp, bno) ((bp)->b_bn = (xfs_daddr_t)(bno)) | |
319 | #define XFS_BUF_OFFSET(bp) ((bp)->b_file_offset) | |
320 | #define XFS_BUF_SET_OFFSET(bp, off) ((bp)->b_file_offset = (off)) | |
321 | #define XFS_BUF_COUNT(bp) ((bp)->b_count_desired) | |
322 | #define XFS_BUF_SET_COUNT(bp, cnt) ((bp)->b_count_desired = (cnt)) | |
323 | #define XFS_BUF_SIZE(bp) ((bp)->b_buffer_length) | |
324 | #define XFS_BUF_SET_SIZE(bp, cnt) ((bp)->b_buffer_length = (cnt)) | |
325 | ||
326 | #define XFS_BUF_SET_VTYPE_REF(bp, type, ref) do { } while (0) | |
327 | #define XFS_BUF_SET_VTYPE(bp, type) do { } while (0) | |
328 | #define XFS_BUF_SET_REF(bp, ref) do { } while (0) | |
329 | ||
330 | #define XFS_BUF_ISPINNED(bp) xfs_buf_ispin(bp) | |
331 | ||
332 | #define XFS_BUF_VALUSEMA(bp) xfs_buf_lock_value(bp) | |
333 | #define XFS_BUF_CPSEMA(bp) (xfs_buf_cond_lock(bp) == 0) | |
334 | #define XFS_BUF_VSEMA(bp) xfs_buf_unlock(bp) | |
335 | #define XFS_BUF_PSEMA(bp,x) xfs_buf_lock(bp) | |
336 | #define XFS_BUF_V_IODONESEMA(bp) up(&bp->b_iodonesema); | |
337 | ||
338 | #define XFS_BUF_SET_TARGET(bp, target) ((bp)->b_target = (target)) | |
339 | #define XFS_BUF_TARGET(bp) ((bp)->b_target) | |
340 | #define XFS_BUFTARG_NAME(target) xfs_buf_target_name(target) | |
341 | ||
342 | static inline int xfs_bawrite(void *mp, xfs_buf_t *bp) | |
1da177e4 | 343 | { |
ce8e922c NS |
344 | bp->b_fspriv3 = mp; |
345 | bp->b_strat = xfs_bdstrat_cb; | |
346 | xfs_buf_delwri_dequeue(bp); | |
347 | return xfs_buf_iostart(bp, XBF_WRITE | XBF_ASYNC | _XBF_RUN_QUEUES); | |
1da177e4 LT |
348 | } |
349 | ||
ce8e922c | 350 | static inline void xfs_buf_relse(xfs_buf_t *bp) |
1da177e4 | 351 | { |
ce8e922c NS |
352 | if (!bp->b_relse) |
353 | xfs_buf_unlock(bp); | |
354 | xfs_buf_rele(bp); | |
1da177e4 LT |
355 | } |
356 | ||
ce8e922c NS |
357 | #define xfs_bpin(bp) xfs_buf_pin(bp) |
358 | #define xfs_bunpin(bp) xfs_buf_unpin(bp) | |
1da177e4 LT |
359 | |
360 | #define xfs_buftrace(id, bp) \ | |
ce8e922c | 361 | xfs_buf_trace(bp, id, NULL, (void *)__builtin_return_address(0)) |
1da177e4 | 362 | |
ce8e922c | 363 | #define xfs_biodone(bp) xfs_buf_ioend(bp, 0) |
1da177e4 | 364 | |
ce8e922c NS |
365 | #define xfs_biomove(bp, off, len, data, rw) \ |
366 | xfs_buf_iomove((bp), (off), (len), (data), \ | |
367 | ((rw) == XFS_B_WRITE) ? XBRW_WRITE : XBRW_READ) | |
1da177e4 | 368 | |
ce8e922c NS |
369 | #define xfs_biozero(bp, off, len) \ |
370 | xfs_buf_iomove((bp), (off), (len), NULL, XBRW_ZERO) | |
1da177e4 LT |
371 | |
372 | ||
ce8e922c | 373 | static inline int XFS_bwrite(xfs_buf_t *bp) |
1da177e4 | 374 | { |
ce8e922c | 375 | int iowait = (bp->b_flags & XBF_ASYNC) == 0; |
1da177e4 LT |
376 | int error = 0; |
377 | ||
378 | if (!iowait) | |
ce8e922c | 379 | bp->b_flags |= _XBF_RUN_QUEUES; |
1da177e4 | 380 | |
ce8e922c NS |
381 | xfs_buf_delwri_dequeue(bp); |
382 | xfs_buf_iostrategy(bp); | |
1da177e4 | 383 | if (iowait) { |
ce8e922c NS |
384 | error = xfs_buf_iowait(bp); |
385 | xfs_buf_relse(bp); | |
1da177e4 LT |
386 | } |
387 | return error; | |
388 | } | |
389 | ||
1da177e4 LT |
390 | static inline int xfs_bdwrite(void *mp, xfs_buf_t *bp) |
391 | { | |
ce8e922c NS |
392 | bp->b_strat = xfs_bdstrat_cb; |
393 | bp->b_fspriv3 = mp; | |
394 | return xfs_buf_iostart(bp, XBF_DELWRI | XBF_ASYNC); | |
1da177e4 LT |
395 | } |
396 | ||
ce8e922c | 397 | #define XFS_bdstrat(bp) xfs_buf_iorequest(bp) |
1da177e4 | 398 | |
ce8e922c | 399 | #define xfs_iowait(bp) xfs_buf_iowait(bp) |
1da177e4 LT |
400 | |
401 | #define xfs_baread(target, rablkno, ralen) \ | |
ce8e922c | 402 | xfs_buf_readahead((target), (rablkno), (ralen), XBF_DONT_BLOCK) |
1da177e4 LT |
403 | |
404 | ||
405 | /* | |
406 | * Handling of buftargs. | |
407 | */ | |
1da177e4 LT |
408 | extern xfs_buftarg_t *xfs_alloc_buftarg(struct block_device *, int); |
409 | extern void xfs_free_buftarg(xfs_buftarg_t *, int); | |
410 | extern void xfs_wait_buftarg(xfs_buftarg_t *); | |
411 | extern int xfs_setsize_buftarg(xfs_buftarg_t *, unsigned int, unsigned int); | |
1da177e4 | 412 | extern int xfs_flush_buftarg(xfs_buftarg_t *, int); |
e6a0e9cd TS |
413 | #ifdef CONFIG_KDB_MODULES |
414 | extern struct list_head *xfs_get_buftarg_list(void); | |
415 | #endif | |
1da177e4 | 416 | |
ce8e922c NS |
417 | #define xfs_getsize_buftarg(buftarg) block_size((buftarg)->bt_bdev) |
418 | #define xfs_readonly_buftarg(buftarg) bdev_read_only((buftarg)->bt_bdev) | |
419 | ||
420 | #define xfs_binval(buftarg) xfs_flush_buftarg(buftarg, 1) | |
421 | #define XFS_bflush(buftarg) xfs_flush_buftarg(buftarg, 1) | |
1da177e4 LT |
422 | |
423 | #endif /* __XFS_BUF_H__ */ |