author | maybee |
Fri, 02 Feb 2007 15:36:58 -0800 | |
changeset 3547 | e396e0a440b1 |
parent 3463 | 5007f15d5674 |
child 3668 | dc5b9a9208ca |
permissions | -rw-r--r-- |
789 | 1 |
/* |
2 |
* CDDL HEADER START |
|
3 |
* |
|
4 |
* The contents of this file are subject to the terms of the |
|
1544 | 5 |
* Common Development and Distribution License (the "License"). |
6 |
* You may not use this file except in compliance with the License. |
|
789 | 7 |
* |
8 |
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE |
|
9 |
* or http://www.opensolaris.org/os/licensing. |
|
10 |
* See the License for the specific language governing permissions |
|
11 |
* and limitations under the License. |
|
12 |
* |
|
13 |
* When distributing Covered Code, include this CDDL HEADER in each |
|
14 |
* file and include the License file at usr/src/OPENSOLARIS.LICENSE. |
|
15 |
* If applicable, add the following below this CDDL HEADER, with the |
|
16 |
* fields enclosed by brackets "[]" replaced with your own identifying |
|
17 |
* information: Portions Copyright [yyyy] [name of copyright owner] |
|
18 |
* |
|
19 |
* CDDL HEADER END |
|
20 |
*/ |
|
21 |
/* |
|
3459
358b6bdb15b6
6512311 zio_done() is chunky and needs to go on a diet
ek110237
parents:
3290
diff
changeset
|
22 |
* Copyright 2007 Sun Microsystems, Inc. All rights reserved. |
789 | 23 |
* Use is subject to license terms. |
24 |
*/ |
|
25 |
||
26 |
#pragma ident "%Z%%M% %I% %E% SMI" |
|
27 |
||
28 |
#include <sys/zfs_context.h> |
|
1544 | 29 |
#include <sys/fm/fs/zfs.h> |
789 | 30 |
#include <sys/spa.h> |
31 |
#include <sys/txg.h> |
|
32 |
#include <sys/spa_impl.h> |
|
33 |
#include <sys/vdev_impl.h> |
|
34 |
#include <sys/zio_impl.h> |
|
35 |
#include <sys/zio_compress.h> |
|
36 |
#include <sys/zio_checksum.h> |
|
37 |
||
38 |
/* |
|
39 |
* ========================================================================== |
|
40 |
* I/O priority table |
|
41 |
* ========================================================================== |
|
42 |
*/ |
|
43 |
uint8_t zio_priority_table[ZIO_PRIORITY_TABLE_SIZE] = { |
|
44 |
0, /* ZIO_PRIORITY_NOW */ |
|
45 |
0, /* ZIO_PRIORITY_SYNC_READ */ |
|
46 |
0, /* ZIO_PRIORITY_SYNC_WRITE */ |
|
47 |
6, /* ZIO_PRIORITY_ASYNC_READ */ |
|
48 |
4, /* ZIO_PRIORITY_ASYNC_WRITE */ |
|
49 |
4, /* ZIO_PRIORITY_FREE */ |
|
50 |
0, /* ZIO_PRIORITY_CACHE_FILL */ |
|
51 |
0, /* ZIO_PRIORITY_LOG_WRITE */ |
|
52 |
10, /* ZIO_PRIORITY_RESILVER */ |
|
53 |
20, /* ZIO_PRIORITY_SCRUB */ |
|
54 |
}; |
|
55 |
||
56 |
/* |
|
57 |
* ========================================================================== |
|
58 |
* I/O type descriptions |
|
59 |
* ========================================================================== |
|
60 |
*/ |
|
61 |
char *zio_type_name[ZIO_TYPES] = { |
|
62 |
"null", "read", "write", "free", "claim", "ioctl" }; |
|
63 |
||
64 |
/* At or above this size, force gang blocking - for testing */ |
|
65 |
uint64_t zio_gang_bang = SPA_MAXBLOCKSIZE + 1; |
|
66 |
||
67 |
typedef struct zio_sync_pass { |
|
68 |
int zp_defer_free; /* defer frees after this pass */ |
|
69 |
int zp_dontcompress; /* don't compress after this pass */ |
|
70 |
int zp_rewrite; /* rewrite new bps after this pass */ |
|
71 |
} zio_sync_pass_t; |
|
72 |
||
73 |
zio_sync_pass_t zio_sync_pass = { |
|
74 |
1, /* zp_defer_free */ |
|
75 |
4, /* zp_dontcompress */ |
|
76 |
1, /* zp_rewrite */ |
|
77 |
}; |
|
78 |
||
79 |
/* |
|
80 |
* ========================================================================== |
|
81 |
* I/O kmem caches |
|
82 |
* ========================================================================== |
|
83 |
*/ |
|
84 |
kmem_cache_t *zio_buf_cache[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT]; |
|
3290 | 85 |
kmem_cache_t *zio_data_buf_cache[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT]; |
86 |
||
87 |
#ifdef _KERNEL |
|
88 |
extern vmem_t *zio_alloc_arena; |
|
89 |
#endif |
|
789 | 90 |
|
91 |
void |
|
92 |
zio_init(void) |
|
93 |
{ |
|
94 |
size_t c; |
|
3290 | 95 |
vmem_t *data_alloc_arena = NULL; |
96 |
||
97 |
#ifdef _KERNEL |
|
98 |
data_alloc_arena = zio_alloc_arena; |
|
99 |
#endif |
|
789 | 100 |
|
101 |
/* |
|
102 |
* For small buffers, we want a cache for each multiple of |
|
103 |
* SPA_MINBLOCKSIZE. For medium-size buffers, we want a cache |
|
104 |
* for each quarter-power of 2. For large buffers, we want |
|
105 |
* a cache for each multiple of PAGESIZE. |
|
106 |
*/ |
|
107 |
for (c = 0; c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT; c++) { |
|
108 |
size_t size = (c + 1) << SPA_MINBLOCKSHIFT; |
|
109 |
size_t p2 = size; |
|
110 |
size_t align = 0; |
|
111 |
||
112 |
while (p2 & (p2 - 1)) |
|
113 |
p2 &= p2 - 1; |
|
114 |
||
115 |
if (size <= 4 * SPA_MINBLOCKSIZE) { |
|
116 |
align = SPA_MINBLOCKSIZE; |
|
117 |
} else if (P2PHASE(size, PAGESIZE) == 0) { |
|
118 |
align = PAGESIZE; |
|
119 |
} else if (P2PHASE(size, p2 >> 2) == 0) { |
|
120 |
align = p2 >> 2; |
|
121 |
} |
|
122 |
||
123 |
if (align != 0) { |
|
3290 | 124 |
char name[36]; |
2856 | 125 |
(void) sprintf(name, "zio_buf_%lu", (ulong_t)size); |
789 | 126 |
zio_buf_cache[c] = kmem_cache_create(name, size, |
849
8d799fd81a9b
6345023 /dev/zfs fails to open once ZFS module is unloaded
bonwick
parents:
789
diff
changeset
|
127 |
align, NULL, NULL, NULL, NULL, NULL, KMC_NODEBUG); |
3290 | 128 |
|
129 |
(void) sprintf(name, "zio_data_buf_%lu", (ulong_t)size); |
|
130 |
zio_data_buf_cache[c] = kmem_cache_create(name, size, |
|
131 |
align, NULL, NULL, NULL, NULL, data_alloc_arena, |
|
132 |
KMC_NODEBUG); |
|
133 |
||
789 | 134 |
dprintf("creating cache for size %5lx align %5lx\n", |
135 |
size, align); |
|
136 |
} |
|
137 |
} |
|
138 |
||
139 |
while (--c != 0) { |
|
140 |
ASSERT(zio_buf_cache[c] != NULL); |
|
141 |
if (zio_buf_cache[c - 1] == NULL) |
|
142 |
zio_buf_cache[c - 1] = zio_buf_cache[c]; |
|
3290 | 143 |
|
144 |
ASSERT(zio_data_buf_cache[c] != NULL); |
|
145 |
if (zio_data_buf_cache[c - 1] == NULL) |
|
146 |
zio_data_buf_cache[c - 1] = zio_data_buf_cache[c]; |
|
789 | 147 |
} |
1544 | 148 |
|
149 |
zio_inject_init(); |
|
789 | 150 |
} |
151 |
||
152 |
void |
|
153 |
zio_fini(void) |
|
154 |
{ |
|
155 |
size_t c; |
|
156 |
kmem_cache_t *last_cache = NULL; |
|
3290 | 157 |
kmem_cache_t *last_data_cache = NULL; |
789 | 158 |
|
159 |
for (c = 0; c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT; c++) { |
|
160 |
if (zio_buf_cache[c] != last_cache) { |
|
161 |
last_cache = zio_buf_cache[c]; |
|
162 |
kmem_cache_destroy(zio_buf_cache[c]); |
|
163 |
} |
|
164 |
zio_buf_cache[c] = NULL; |
|
3290 | 165 |
|
166 |
if (zio_data_buf_cache[c] != last_data_cache) { |
|
167 |
last_data_cache = zio_data_buf_cache[c]; |
|
168 |
kmem_cache_destroy(zio_data_buf_cache[c]); |
|
169 |
} |
|
170 |
zio_data_buf_cache[c] = NULL; |
|
789 | 171 |
} |
1544 | 172 |
|
173 |
zio_inject_fini(); |
|
789 | 174 |
} |
175 |
||
176 |
/* |
|
177 |
* ========================================================================== |
|
178 |
* Allocate and free I/O buffers |
|
179 |
* ========================================================================== |
|
180 |
*/ |
|
3290 | 181 |
|
182 |
/* |
|
183 |
* Use zio_buf_alloc to allocate ZFS metadata. This data will appear in a |
|
184 |
* crashdump if the kernel panics, so use it judiciously. Obviously, it's |
|
185 |
* useful to inspect ZFS metadata, but if possible, we should avoid keeping |
|
186 |
* excess / transient data in-core during a crashdump. |
|
187 |
*/ |
|
789 | 188 |
void * |
189 |
zio_buf_alloc(size_t size) |
|
190 |
{ |
|
191 |
size_t c = (size - 1) >> SPA_MINBLOCKSHIFT; |
|
192 |
||
193 |
ASSERT(c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT); |
|
194 |
||
195 |
return (kmem_cache_alloc(zio_buf_cache[c], KM_SLEEP)); |
|
196 |
} |
|
197 |
||
3290 | 198 |
/* |
199 |
* Use zio_data_buf_alloc to allocate data. The data will not appear in a |
|
200 |
* crashdump if the kernel panics. This exists so that we will limit the amount |
|
201 |
* of ZFS data that shows up in a kernel crashdump. (Thus reducing the amount |
|
202 |
* of kernel heap dumped to disk when the kernel panics) |
|
203 |
*/ |
|
204 |
void * |
|
205 |
zio_data_buf_alloc(size_t size) |
|
206 |
{ |
|
207 |
size_t c = (size - 1) >> SPA_MINBLOCKSHIFT; |
|
208 |
||
209 |
ASSERT(c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT); |
|
210 |
||
211 |
return (kmem_cache_alloc(zio_data_buf_cache[c], KM_SLEEP)); |
|
212 |
} |
|
213 |
||
789 | 214 |
void |
215 |
zio_buf_free(void *buf, size_t size) |
|
216 |
{ |
|
217 |
size_t c = (size - 1) >> SPA_MINBLOCKSHIFT; |
|
218 |
||
219 |
ASSERT(c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT); |
|
220 |
||
221 |
kmem_cache_free(zio_buf_cache[c], buf); |
|
222 |
} |
|
223 |
||
3290 | 224 |
void |
225 |
zio_data_buf_free(void *buf, size_t size) |
|
226 |
{ |
|
227 |
size_t c = (size - 1) >> SPA_MINBLOCKSHIFT; |
|
228 |
||
229 |
ASSERT(c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT); |
|
230 |
||
231 |
kmem_cache_free(zio_data_buf_cache[c], buf); |
|
232 |
} |
|
3463 | 233 |
|
789 | 234 |
/* |
235 |
* ========================================================================== |
|
236 |
* Push and pop I/O transform buffers |
|
237 |
* ========================================================================== |
|
238 |
*/ |
|
239 |
static void |
|
240 |
zio_push_transform(zio_t *zio, void *data, uint64_t size, uint64_t bufsize) |
|
241 |
{ |
|
242 |
zio_transform_t *zt = kmem_alloc(sizeof (zio_transform_t), KM_SLEEP); |
|
243 |
||
244 |
zt->zt_data = data; |
|
245 |
zt->zt_size = size; |
|
246 |
zt->zt_bufsize = bufsize; |
|
247 |
||
248 |
zt->zt_next = zio->io_transform_stack; |
|
249 |
zio->io_transform_stack = zt; |
|
250 |
||
251 |
zio->io_data = data; |
|
252 |
zio->io_size = size; |
|
253 |
} |
|
254 |
||
255 |
static void |
|
256 |
zio_pop_transform(zio_t *zio, void **data, uint64_t *size, uint64_t *bufsize) |
|
257 |
{ |
|
258 |
zio_transform_t *zt = zio->io_transform_stack; |
|
259 |
||
260 |
*data = zt->zt_data; |
|
261 |
*size = zt->zt_size; |
|
262 |
*bufsize = zt->zt_bufsize; |
|
263 |
||
264 |
zio->io_transform_stack = zt->zt_next; |
|
265 |
kmem_free(zt, sizeof (zio_transform_t)); |
|
266 |
||
267 |
if ((zt = zio->io_transform_stack) != NULL) { |
|
268 |
zio->io_data = zt->zt_data; |
|
269 |
zio->io_size = zt->zt_size; |
|
270 |
} |
|
271 |
} |
|
272 |
||
273 |
static void |
|
274 |
zio_clear_transform_stack(zio_t *zio) |
|
275 |
{ |
|
276 |
void *data; |
|
277 |
uint64_t size, bufsize; |
|
278 |
||
279 |
ASSERT(zio->io_transform_stack != NULL); |
|
280 |
||
281 |
zio_pop_transform(zio, &data, &size, &bufsize); |
|
282 |
while (zio->io_transform_stack != NULL) { |
|
283 |
zio_buf_free(data, bufsize); |
|
284 |
zio_pop_transform(zio, &data, &size, &bufsize); |
|
285 |
} |
|
286 |
} |
|
287 |
||
288 |
/* |
|
289 |
* ========================================================================== |
|
290 |
* Create the various types of I/O (read, write, free) |
|
291 |
* ========================================================================== |
|
292 |
*/ |
|
293 |
static zio_t * |
|
294 |
zio_create(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, |
|
295 |
void *data, uint64_t size, zio_done_func_t *done, void *private, |
|
296 |
zio_type_t type, int priority, int flags, uint8_t stage, uint32_t pipeline) |
|
297 |
{ |
|
298 |
zio_t *zio; |
|
299 |
||
300 |
ASSERT3U(size, <=, SPA_MAXBLOCKSIZE); |
|
301 |
ASSERT(P2PHASE(size, SPA_MINBLOCKSIZE) == 0); |
|
302 |
||
303 |
zio = kmem_zalloc(sizeof (zio_t), KM_SLEEP); |
|
304 |
zio->io_parent = pio; |
|
305 |
zio->io_spa = spa; |
|
306 |
zio->io_txg = txg; |
|
307 |
if (bp != NULL) { |
|
308 |
zio->io_bp = bp; |
|
309 |
zio->io_bp_copy = *bp; |
|
310 |
zio->io_bp_orig = *bp; |
|
311 |
} |
|
312 |
zio->io_done = done; |
|
313 |
zio->io_private = private; |
|
314 |
zio->io_type = type; |
|
315 |
zio->io_priority = priority; |
|
316 |
zio->io_stage = stage; |
|
317 |
zio->io_pipeline = pipeline; |
|
318 |
zio->io_async_stages = ZIO_ASYNC_PIPELINE_STAGES; |
|
319 |
zio->io_timestamp = lbolt64; |
|
320 |
zio->io_flags = flags; |
|
2856 | 321 |
mutex_init(&zio->io_lock, NULL, MUTEX_DEFAULT, NULL); |
789 | 322 |
zio_push_transform(zio, data, size, size); |
323 |
||
3463 | 324 |
/* |
325 |
* Note on config lock: |
|
326 |
* |
|
327 |
* If CONFIG_HELD is set, then the caller already has the config |
|
328 |
* lock, so we don't need it for this io. |
|
329 |
* |
|
330 |
* We set CONFIG_GRABBED to indicate that we have grabbed the |
|
331 |
* config lock on behalf of this io, so it should be released |
|
332 |
* in zio_done. |
|
333 |
* |
|
334 |
* Unless CONFIG_HELD is set, we will grab the config lock for |
|
335 |
* any top-level (parent-less) io, *except* NULL top-level ios. |
|
336 |
* The NULL top-level ios rarely have any children, so we delay |
|
337 |
* grabbing the lock until the first child is added (but it is |
|
338 |
* still grabbed on behalf of the top-level i/o, so additional |
|
339 |
* children don't need to also grab it). This greatly reduces |
|
340 |
* contention on the config lock. |
|
341 |
*/ |
|
789 | 342 |
if (pio == NULL) { |
3463 | 343 |
if (type != ZIO_TYPE_NULL && |
344 |
!(flags & ZIO_FLAG_CONFIG_HELD)) { |
|
1544 | 345 |
spa_config_enter(zio->io_spa, RW_READER, zio); |
3463 | 346 |
zio->io_flags |= ZIO_FLAG_CONFIG_GRABBED; |
347 |
} |
|
789 | 348 |
zio->io_root = zio; |
349 |
} else { |
|
350 |
zio->io_root = pio->io_root; |
|
1544 | 351 |
if (!(flags & ZIO_FLAG_NOBOOKMARK)) |
352 |
zio->io_logical = pio->io_logical; |
|
789 | 353 |
mutex_enter(&pio->io_lock); |
3463 | 354 |
if (pio->io_parent == NULL && |
355 |
pio->io_type == ZIO_TYPE_NULL && |
|
356 |
!(pio->io_flags & ZIO_FLAG_CONFIG_GRABBED) && |
|
357 |
!(pio->io_flags & ZIO_FLAG_CONFIG_HELD)) { |
|
358 |
pio->io_flags |= ZIO_FLAG_CONFIG_GRABBED; |
|
359 |
spa_config_enter(zio->io_spa, RW_READER, pio); |
|
360 |
} |
|
789 | 361 |
if (stage < ZIO_STAGE_READY) |
362 |
pio->io_children_notready++; |
|
363 |
pio->io_children_notdone++; |
|
364 |
zio->io_sibling_next = pio->io_child; |
|
365 |
zio->io_sibling_prev = NULL; |
|
366 |
if (pio->io_child != NULL) |
|
367 |
pio->io_child->io_sibling_prev = zio; |
|
368 |
pio->io_child = zio; |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
369 |
zio->io_ndvas = pio->io_ndvas; |
789 | 370 |
mutex_exit(&pio->io_lock); |
371 |
} |
|
372 |
||
373 |
return (zio); |
|
374 |
} |
|
375 |
||
376 |
zio_t * |
|
377 |
zio_null(zio_t *pio, spa_t *spa, zio_done_func_t *done, void *private, |
|
378 |
int flags) |
|
379 |
{ |
|
380 |
zio_t *zio; |
|
381 |
||
382 |
zio = zio_create(pio, spa, 0, NULL, NULL, 0, done, private, |
|
383 |
ZIO_TYPE_NULL, ZIO_PRIORITY_NOW, flags, ZIO_STAGE_OPEN, |
|
384 |
ZIO_WAIT_FOR_CHILDREN_PIPELINE); |
|
385 |
||
386 |
return (zio); |
|
387 |
} |
|
388 |
||
389 |
zio_t * |
|
390 |
zio_root(spa_t *spa, zio_done_func_t *done, void *private, int flags) |
|
391 |
{ |
|
392 |
return (zio_null(NULL, spa, done, private, flags)); |
|
393 |
} |
|
394 |
||
395 |
zio_t * |
|
396 |
zio_read(zio_t *pio, spa_t *spa, blkptr_t *bp, void *data, |
|
397 |
uint64_t size, zio_done_func_t *done, void *private, |
|
1544 | 398 |
int priority, int flags, zbookmark_t *zb) |
789 | 399 |
{ |
400 |
zio_t *zio; |
|
401 |
||
402 |
ASSERT3U(size, ==, BP_GET_LSIZE(bp)); |
|
403 |
||
404 |
zio = zio_create(pio, spa, bp->blk_birth, bp, data, size, done, private, |
|
2981 | 405 |
ZIO_TYPE_READ, priority, flags | ZIO_FLAG_USER, |
406 |
ZIO_STAGE_OPEN, ZIO_READ_PIPELINE); |
|
1544 | 407 |
zio->io_bookmark = *zb; |
408 |
||
409 |
zio->io_logical = zio; |
|
789 | 410 |
|
411 |
/* |
|
412 |
* Work off our copy of the bp so the caller can free it. |
|
413 |
*/ |
|
414 |
zio->io_bp = &zio->io_bp_copy; |
|
415 |
||
416 |
if (BP_GET_COMPRESS(bp) != ZIO_COMPRESS_OFF) { |
|
417 |
uint64_t csize = BP_GET_PSIZE(bp); |
|
418 |
void *cbuf = zio_buf_alloc(csize); |
|
419 |
||
420 |
zio_push_transform(zio, cbuf, csize, csize); |
|
421 |
zio->io_pipeline |= 1U << ZIO_STAGE_READ_DECOMPRESS; |
|
422 |
} |
|
423 |
||
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
424 |
if (BP_IS_GANG(bp)) { |
789 | 425 |
uint64_t gsize = SPA_GANGBLOCKSIZE; |
426 |
void *gbuf = zio_buf_alloc(gsize); |
|
427 |
||
428 |
zio_push_transform(zio, gbuf, gsize, gsize); |
|
429 |
zio->io_pipeline |= 1U << ZIO_STAGE_READ_GANG_MEMBERS; |
|
430 |
} |
|
431 |
||
432 |
return (zio); |
|
433 |
} |
|
434 |
||
435 |
zio_t * |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
436 |
zio_write(zio_t *pio, spa_t *spa, int checksum, int compress, int ncopies, |
789 | 437 |
uint64_t txg, blkptr_t *bp, void *data, uint64_t size, |
3547
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3463
diff
changeset
|
438 |
zio_done_func_t *ready, zio_done_func_t *done, void *private, int priority, |
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3463
diff
changeset
|
439 |
int flags, zbookmark_t *zb) |
789 | 440 |
{ |
441 |
zio_t *zio; |
|
442 |
||
443 |
ASSERT(checksum >= ZIO_CHECKSUM_OFF && |
|
444 |
checksum < ZIO_CHECKSUM_FUNCTIONS); |
|
445 |
||
446 |
ASSERT(compress >= ZIO_COMPRESS_OFF && |
|
447 |
compress < ZIO_COMPRESS_FUNCTIONS); |
|
448 |
||
449 |
zio = zio_create(pio, spa, txg, bp, data, size, done, private, |
|
2981 | 450 |
ZIO_TYPE_WRITE, priority, flags | ZIO_FLAG_USER, |
789 | 451 |
ZIO_STAGE_OPEN, ZIO_WRITE_PIPELINE); |
452 |
||
3547
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3463
diff
changeset
|
453 |
zio->io_ready = ready; |
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3463
diff
changeset
|
454 |
|
1544 | 455 |
zio->io_bookmark = *zb; |
456 |
||
457 |
zio->io_logical = zio; |
|
458 |
||
789 | 459 |
zio->io_checksum = checksum; |
460 |
zio->io_compress = compress; |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
461 |
zio->io_ndvas = ncopies; |
789 | 462 |
|
463 |
if (compress != ZIO_COMPRESS_OFF) |
|
464 |
zio->io_async_stages |= 1U << ZIO_STAGE_WRITE_COMPRESS; |
|
465 |
||
466 |
if (bp->blk_birth != txg) { |
|
467 |
/* XXX the bp usually (always?) gets re-zeroed later */ |
|
468 |
BP_ZERO(bp); |
|
469 |
BP_SET_LSIZE(bp, size); |
|
470 |
BP_SET_PSIZE(bp, size); |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
471 |
} else { |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
472 |
/* Make sure someone doesn't change their mind on overwrites */ |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
473 |
ASSERT(MIN(zio->io_ndvas + BP_IS_GANG(bp), |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
474 |
spa_max_replication(spa)) == BP_GET_NDVAS(bp)); |
789 | 475 |
} |
476 |
||
477 |
return (zio); |
|
478 |
} |
|
479 |
||
480 |
zio_t * |
|
481 |
zio_rewrite(zio_t *pio, spa_t *spa, int checksum, |
|
482 |
uint64_t txg, blkptr_t *bp, void *data, uint64_t size, |
|
1544 | 483 |
zio_done_func_t *done, void *private, int priority, int flags, |
484 |
zbookmark_t *zb) |
|
789 | 485 |
{ |
486 |
zio_t *zio; |
|
487 |
||
488 |
zio = zio_create(pio, spa, txg, bp, data, size, done, private, |
|
2981 | 489 |
ZIO_TYPE_WRITE, priority, flags | ZIO_FLAG_USER, |
789 | 490 |
ZIO_STAGE_OPEN, ZIO_REWRITE_PIPELINE); |
491 |
||
1544 | 492 |
zio->io_bookmark = *zb; |
789 | 493 |
zio->io_checksum = checksum; |
494 |
zio->io_compress = ZIO_COMPRESS_OFF; |
|
495 |
||
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
496 |
if (pio != NULL) |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
497 |
ASSERT3U(zio->io_ndvas, <=, BP_GET_NDVAS(bp)); |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
498 |
|
789 | 499 |
return (zio); |
500 |
} |
|
501 |
||
502 |
static zio_t * |
|
503 |
zio_write_allocate(zio_t *pio, spa_t *spa, int checksum, |
|
504 |
uint64_t txg, blkptr_t *bp, void *data, uint64_t size, |
|
505 |
zio_done_func_t *done, void *private, int priority, int flags) |
|
506 |
{ |
|
507 |
zio_t *zio; |
|
508 |
||
509 |
BP_ZERO(bp); |
|
510 |
BP_SET_LSIZE(bp, size); |
|
511 |
BP_SET_PSIZE(bp, size); |
|
512 |
BP_SET_COMPRESS(bp, ZIO_COMPRESS_OFF); |
|
513 |
||
514 |
zio = zio_create(pio, spa, txg, bp, data, size, done, private, |
|
515 |
ZIO_TYPE_WRITE, priority, flags, |
|
516 |
ZIO_STAGE_OPEN, ZIO_WRITE_ALLOCATE_PIPELINE); |
|
517 |
||
518 |
zio->io_checksum = checksum; |
|
519 |
zio->io_compress = ZIO_COMPRESS_OFF; |
|
520 |
||
521 |
return (zio); |
|
522 |
} |
|
523 |
||
524 |
zio_t * |
|
525 |
zio_free(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, |
|
526 |
zio_done_func_t *done, void *private) |
|
527 |
{ |
|
528 |
zio_t *zio; |
|
529 |
||
530 |
ASSERT(!BP_IS_HOLE(bp)); |
|
531 |
||
532 |
if (txg == spa->spa_syncing_txg && |
|
533 |
spa->spa_sync_pass > zio_sync_pass.zp_defer_free) { |
|
534 |
bplist_enqueue_deferred(&spa->spa_sync_bplist, bp); |
|
535 |
return (zio_null(pio, spa, NULL, NULL, 0)); |
|
536 |
} |
|
537 |
||
538 |
zio = zio_create(pio, spa, txg, bp, NULL, 0, done, private, |
|
2981 | 539 |
ZIO_TYPE_FREE, ZIO_PRIORITY_FREE, ZIO_FLAG_USER, |
789 | 540 |
ZIO_STAGE_OPEN, ZIO_FREE_PIPELINE); |
541 |
||
542 |
zio->io_bp = &zio->io_bp_copy; |
|
543 |
||
544 |
return (zio); |
|
545 |
} |
|
546 |
||
547 |
zio_t * |
|
548 |
zio_claim(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, |
|
549 |
zio_done_func_t *done, void *private) |
|
550 |
{ |
|
551 |
zio_t *zio; |
|
552 |
||
553 |
/* |
|
554 |
* A claim is an allocation of a specific block. Claims are needed |
|
555 |
* to support immediate writes in the intent log. The issue is that |
|
556 |
* immediate writes contain committed data, but in a txg that was |
|
557 |
* *not* committed. Upon opening the pool after an unclean shutdown, |
|
558 |
* the intent log claims all blocks that contain immediate write data |
|
559 |
* so that the SPA knows they're in use. |
|
560 |
* |
|
561 |
* All claims *must* be resolved in the first txg -- before the SPA |
|
562 |
* starts allocating blocks -- so that nothing is allocated twice. |
|
563 |
*/ |
|
564 |
ASSERT3U(spa->spa_uberblock.ub_rootbp.blk_birth, <, spa_first_txg(spa)); |
|
565 |
ASSERT3U(spa_first_txg(spa), <=, txg); |
|
566 |
||
567 |
zio = zio_create(pio, spa, txg, bp, NULL, 0, done, private, |
|
568 |
ZIO_TYPE_CLAIM, ZIO_PRIORITY_NOW, 0, |
|
569 |
ZIO_STAGE_OPEN, ZIO_CLAIM_PIPELINE); |
|
570 |
||
571 |
zio->io_bp = &zio->io_bp_copy; |
|
572 |
||
573 |
return (zio); |
|
574 |
} |
|
575 |
||
576 |
zio_t * |
|
577 |
zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd, |
|
578 |
zio_done_func_t *done, void *private, int priority, int flags) |
|
579 |
{ |
|
580 |
zio_t *zio; |
|
581 |
int c; |
|
582 |
||
583 |
if (vd->vdev_children == 0) { |
|
584 |
zio = zio_create(pio, spa, 0, NULL, NULL, 0, done, private, |
|
585 |
ZIO_TYPE_IOCTL, priority, flags, |
|
586 |
ZIO_STAGE_OPEN, ZIO_IOCTL_PIPELINE); |
|
587 |
||
588 |
zio->io_vd = vd; |
|
589 |
zio->io_cmd = cmd; |
|
590 |
} else { |
|
591 |
zio = zio_null(pio, spa, NULL, NULL, flags); |
|
592 |
||
593 |
for (c = 0; c < vd->vdev_children; c++) |
|
594 |
zio_nowait(zio_ioctl(zio, spa, vd->vdev_child[c], cmd, |
|
595 |
done, private, priority, flags)); |
|
596 |
} |
|
597 |
||
598 |
return (zio); |
|
599 |
} |
|
600 |
||
601 |
static void |
|
602 |
zio_phys_bp_init(vdev_t *vd, blkptr_t *bp, uint64_t offset, uint64_t size, |
|
603 |
int checksum) |
|
604 |
{ |
|
605 |
ASSERT(vd->vdev_children == 0); |
|
606 |
||
607 |
ASSERT(size <= SPA_MAXBLOCKSIZE); |
|
608 |
ASSERT(P2PHASE(size, SPA_MINBLOCKSIZE) == 0); |
|
609 |
ASSERT(P2PHASE(offset, SPA_MINBLOCKSIZE) == 0); |
|
610 |
||
611 |
ASSERT(offset + size <= VDEV_LABEL_START_SIZE || |
|
612 |
offset >= vd->vdev_psize - VDEV_LABEL_END_SIZE); |
|
613 |
ASSERT3U(offset + size, <=, vd->vdev_psize); |
|
614 |
||
615 |
BP_ZERO(bp); |
|
616 |
||
617 |
BP_SET_LSIZE(bp, size); |
|
618 |
BP_SET_PSIZE(bp, size); |
|
619 |
||
620 |
BP_SET_CHECKSUM(bp, checksum); |
|
621 |
BP_SET_COMPRESS(bp, ZIO_COMPRESS_OFF); |
|
622 |
BP_SET_BYTEORDER(bp, ZFS_HOST_BYTEORDER); |
|
623 |
||
624 |
if (checksum != ZIO_CHECKSUM_OFF) |
|
625 |
ZIO_SET_CHECKSUM(&bp->blk_cksum, offset, 0, 0, 0); |
|
626 |
} |
|
627 |
||
628 |
zio_t * |
|
629 |
zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset, uint64_t size, |
|
630 |
void *data, int checksum, zio_done_func_t *done, void *private, |
|
631 |
int priority, int flags) |
|
632 |
{ |
|
633 |
zio_t *zio; |
|
634 |
blkptr_t blk; |
|
635 |
||
636 |
zio_phys_bp_init(vd, &blk, offset, size, checksum); |
|
637 |
||
638 |
zio = zio_create(pio, vd->vdev_spa, 0, &blk, data, size, done, private, |
|
639 |
ZIO_TYPE_READ, priority, flags | ZIO_FLAG_PHYSICAL, |
|
640 |
ZIO_STAGE_OPEN, ZIO_READ_PHYS_PIPELINE); |
|
641 |
||
642 |
zio->io_vd = vd; |
|
643 |
zio->io_offset = offset; |
|
644 |
||
645 |
/* |
|
646 |
* Work off our copy of the bp so the caller can free it. |
|
647 |
*/ |
|
648 |
zio->io_bp = &zio->io_bp_copy; |
|
649 |
||
650 |
return (zio); |
|
651 |
} |
|
652 |
||
653 |
zio_t * |
|
654 |
zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset, uint64_t size, |
|
655 |
void *data, int checksum, zio_done_func_t *done, void *private, |
|
656 |
int priority, int flags) |
|
657 |
{ |
|
658 |
zio_block_tail_t *zbt; |
|
659 |
void *wbuf; |
|
660 |
zio_t *zio; |
|
661 |
blkptr_t blk; |
|
662 |
||
663 |
zio_phys_bp_init(vd, &blk, offset, size, checksum); |
|
664 |
||
665 |
zio = zio_create(pio, vd->vdev_spa, 0, &blk, data, size, done, private, |
|
666 |
ZIO_TYPE_WRITE, priority, flags | ZIO_FLAG_PHYSICAL, |
|
667 |
ZIO_STAGE_OPEN, ZIO_WRITE_PHYS_PIPELINE); |
|
668 |
||
669 |
zio->io_vd = vd; |
|
670 |
zio->io_offset = offset; |
|
671 |
||
672 |
zio->io_bp = &zio->io_bp_copy; |
|
673 |
zio->io_checksum = checksum; |
|
674 |
||
675 |
if (zio_checksum_table[checksum].ci_zbt) { |
|
676 |
/* |
|
677 |
* zbt checksums are necessarily destructive -- they modify |
|
678 |
* one word of the write buffer to hold the verifier/checksum. |
|
679 |
* Therefore, we must make a local copy in case the data is |
|
680 |
* being written to multiple places. |
|
681 |
*/ |
|
682 |
wbuf = zio_buf_alloc(size); |
|
683 |
bcopy(data, wbuf, size); |
|
684 |
zio_push_transform(zio, wbuf, size, size); |
|
685 |
||
686 |
zbt = (zio_block_tail_t *)((char *)wbuf + size) - 1; |
|
687 |
zbt->zbt_cksum = blk.blk_cksum; |
|
688 |
} |
|
689 |
||
690 |
return (zio); |
|
691 |
} |
|
692 |
||
693 |
/* |
|
694 |
* Create a child I/O to do some work for us. It has no associated bp. |
|
695 |
*/ |
|
696 |
zio_t * |
|
697 |
zio_vdev_child_io(zio_t *zio, blkptr_t *bp, vdev_t *vd, uint64_t offset, |
|
698 |
void *data, uint64_t size, int type, int priority, int flags, |
|
699 |
zio_done_func_t *done, void *private) |
|
700 |
{ |
|
701 |
uint32_t pipeline = ZIO_VDEV_CHILD_PIPELINE; |
|
702 |
zio_t *cio; |
|
703 |
||
704 |
if (type == ZIO_TYPE_READ && bp != NULL) { |
|
705 |
/* |
|
706 |
* If we have the bp, then the child should perform the |
|
707 |
* checksum and the parent need not. This pushes error |
|
708 |
* detection as close to the leaves as possible and |
|
709 |
* eliminates redundant checksums in the interior nodes. |
|
710 |
*/ |
|
711 |
pipeline |= 1U << ZIO_STAGE_CHECKSUM_VERIFY; |
|
712 |
zio->io_pipeline &= ~(1U << ZIO_STAGE_CHECKSUM_VERIFY); |
|
713 |
} |
|
714 |
||
715 |
cio = zio_create(zio, zio->io_spa, zio->io_txg, bp, data, size, |
|
716 |
done, private, type, priority, |
|
717 |
(zio->io_flags & ZIO_FLAG_VDEV_INHERIT) | ZIO_FLAG_CANFAIL | flags, |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
718 |
ZIO_STAGE_VDEV_IO_START - 1, pipeline); |
789 | 719 |
|
720 |
cio->io_vd = vd; |
|
721 |
cio->io_offset = offset; |
|
722 |
||
723 |
return (cio); |
|
724 |
} |
|
725 |
||
726 |
/* |
|
727 |
* ========================================================================== |
|
728 |
* Initiate I/O, either sync or async |
|
729 |
* ========================================================================== |
|
730 |
*/ |
|
731 |
int |
|
732 |
zio_wait(zio_t *zio) |
|
733 |
{ |
|
734 |
int error; |
|
735 |
||
736 |
ASSERT(zio->io_stage == ZIO_STAGE_OPEN); |
|
737 |
||
738 |
zio->io_waiter = curthread; |
|
739 |
||
740 |
zio_next_stage_async(zio); |
|
741 |
||
742 |
mutex_enter(&zio->io_lock); |
|
743 |
while (zio->io_stalled != ZIO_STAGE_DONE) |
|
744 |
cv_wait(&zio->io_cv, &zio->io_lock); |
|
745 |
mutex_exit(&zio->io_lock); |
|
746 |
||
747 |
error = zio->io_error; |
|
2856 | 748 |
mutex_destroy(&zio->io_lock); |
789 | 749 |
kmem_free(zio, sizeof (zio_t)); |
750 |
||
751 |
return (error); |
|
752 |
} |
|
753 |
||
754 |
void |
|
755 |
zio_nowait(zio_t *zio) |
|
756 |
{ |
|
757 |
zio_next_stage_async(zio); |
|
758 |
} |
|
759 |
||
760 |
/* |
|
761 |
* ========================================================================== |
|
762 |
* I/O pipeline interlocks: parent/child dependency scoreboarding |
|
763 |
* ========================================================================== |
|
764 |
*/ |
|
765 |
static void |
|
766 |
zio_wait_for_children(zio_t *zio, uint32_t stage, uint64_t *countp) |
|
767 |
{ |
|
768 |
mutex_enter(&zio->io_lock); |
|
769 |
if (*countp == 0) { |
|
770 |
ASSERT(zio->io_stalled == 0); |
|
771 |
mutex_exit(&zio->io_lock); |
|
772 |
zio_next_stage(zio); |
|
773 |
} else { |
|
774 |
zio->io_stalled = stage; |
|
775 |
mutex_exit(&zio->io_lock); |
|
776 |
} |
|
777 |
} |
|
778 |
||
779 |
static void |
|
780 |
zio_notify_parent(zio_t *zio, uint32_t stage, uint64_t *countp) |
|
781 |
{ |
|
782 |
zio_t *pio = zio->io_parent; |
|
783 |
||
784 |
mutex_enter(&pio->io_lock); |
|
785 |
if (pio->io_error == 0 && !(zio->io_flags & ZIO_FLAG_DONT_PROPAGATE)) |
|
786 |
pio->io_error = zio->io_error; |
|
787 |
if (--*countp == 0 && pio->io_stalled == stage) { |
|
788 |
pio->io_stalled = 0; |
|
789 |
mutex_exit(&pio->io_lock); |
|
790 |
zio_next_stage_async(pio); |
|
791 |
} else { |
|
792 |
mutex_exit(&pio->io_lock); |
|
793 |
} |
|
794 |
} |
|
795 |
||
796 |
static void |
|
797 |
zio_wait_children_ready(zio_t *zio) |
|
798 |
{ |
|
799 |
zio_wait_for_children(zio, ZIO_STAGE_WAIT_CHILDREN_READY, |
|
800 |
&zio->io_children_notready); |
|
801 |
} |
|
802 |
||
803 |
void |
|
804 |
zio_wait_children_done(zio_t *zio) |
|
805 |
{ |
|
806 |
zio_wait_for_children(zio, ZIO_STAGE_WAIT_CHILDREN_DONE, |
|
807 |
&zio->io_children_notdone); |
|
808 |
} |
|
809 |
||
810 |
static void |
|
811 |
zio_ready(zio_t *zio) |
|
812 |
{ |
|
813 |
zio_t *pio = zio->io_parent; |
|
814 |
||
3547
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3463
diff
changeset
|
815 |
if (zio->io_ready) |
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3463
diff
changeset
|
816 |
zio->io_ready(zio); |
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3463
diff
changeset
|
817 |
|
789 | 818 |
if (pio != NULL) |
819 |
zio_notify_parent(zio, ZIO_STAGE_WAIT_CHILDREN_READY, |
|
820 |
&pio->io_children_notready); |
|
821 |
||
822 |
if (zio->io_bp) |
|
823 |
zio->io_bp_copy = *zio->io_bp; |
|
824 |
||
825 |
zio_next_stage(zio); |
|
826 |
} |
|
827 |
||
828 |
static void |
|
829 |
zio_done(zio_t *zio) |
|
830 |
{ |
|
831 |
zio_t *pio = zio->io_parent; |
|
832 |
spa_t *spa = zio->io_spa; |
|
833 |
blkptr_t *bp = zio->io_bp; |
|
834 |
vdev_t *vd = zio->io_vd; |
|
835 |
||
836 |
ASSERT(zio->io_children_notready == 0); |
|
837 |
ASSERT(zio->io_children_notdone == 0); |
|
838 |
||
839 |
if (bp != NULL) { |
|
840 |
ASSERT(bp->blk_pad[0] == 0); |
|
841 |
ASSERT(bp->blk_pad[1] == 0); |
|
842 |
ASSERT(bp->blk_pad[2] == 0); |
|
843 |
ASSERT(bcmp(bp, &zio->io_bp_copy, sizeof (blkptr_t)) == 0); |
|
844 |
if (zio->io_type == ZIO_TYPE_WRITE && !BP_IS_HOLE(bp) && |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
845 |
!(zio->io_flags & ZIO_FLAG_IO_REPAIR)) { |
789 | 846 |
ASSERT(!BP_SHOULD_BYTESWAP(bp)); |
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
847 |
if (zio->io_ndvas != 0) |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
848 |
ASSERT3U(zio->io_ndvas, <=, BP_GET_NDVAS(bp)); |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
849 |
ASSERT(BP_COUNT_GANG(bp) == 0 || |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
850 |
(BP_COUNT_GANG(bp) == BP_GET_NDVAS(bp))); |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
851 |
} |
789 | 852 |
} |
853 |
||
854 |
if (vd != NULL) |
|
855 |
vdev_stat_update(zio); |
|
856 |
||
857 |
if (zio->io_error) { |
|
1544 | 858 |
/* |
859 |
* If this I/O is attached to a particular vdev, |
|
860 |
* generate an error message describing the I/O failure |
|
861 |
* at the block level. We ignore these errors if the |
|
862 |
* device is currently unavailable. |
|
863 |
*/ |
|
1732 | 864 |
if (zio->io_error != ECKSUM && vd != NULL && !vdev_is_dead(vd)) |
1544 | 865 |
zfs_ereport_post(FM_EREPORT_ZFS_IO, |
1732 | 866 |
zio->io_spa, vd, zio, 0, 0); |
789 | 867 |
|
1544 | 868 |
if ((zio->io_error == EIO || |
869 |
!(zio->io_flags & ZIO_FLAG_SPECULATIVE)) && |
|
870 |
zio->io_logical == zio) { |
|
871 |
/* |
|
872 |
* For root I/O requests, tell the SPA to log the error |
|
873 |
* appropriately. Also, generate a logical data |
|
874 |
* ereport. |
|
875 |
*/ |
|
876 |
spa_log_error(zio->io_spa, zio); |
|
877 |
||
878 |
zfs_ereport_post(FM_EREPORT_ZFS_DATA, |
|
879 |
zio->io_spa, NULL, zio, 0, 0); |
|
880 |
} |
|
789 | 881 |
|
1544 | 882 |
/* |
883 |
* For I/O requests that cannot fail, panic appropriately. |
|
884 |
*/ |
|
885 |
if (!(zio->io_flags & ZIO_FLAG_CANFAIL)) { |
|
3459
358b6bdb15b6
6512311 zio_done() is chunky and needs to go on a diet
ek110237
parents:
3290
diff
changeset
|
886 |
char *blkbuf; |
358b6bdb15b6
6512311 zio_done() is chunky and needs to go on a diet
ek110237
parents:
3290
diff
changeset
|
887 |
|
358b6bdb15b6
6512311 zio_done() is chunky and needs to go on a diet
ek110237
parents:
3290
diff
changeset
|
888 |
blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_NOSLEEP); |
358b6bdb15b6
6512311 zio_done() is chunky and needs to go on a diet
ek110237
parents:
3290
diff
changeset
|
889 |
if (blkbuf) { |
358b6bdb15b6
6512311 zio_done() is chunky and needs to go on a diet
ek110237
parents:
3290
diff
changeset
|
890 |
sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, |
358b6bdb15b6
6512311 zio_done() is chunky and needs to go on a diet
ek110237
parents:
3290
diff
changeset
|
891 |
bp ? bp : &zio->io_bp_copy); |
358b6bdb15b6
6512311 zio_done() is chunky and needs to go on a diet
ek110237
parents:
3290
diff
changeset
|
892 |
} |
1544 | 893 |
panic("ZFS: %s (%s on %s off %llx: zio %p %s): error " |
894 |
"%d", zio->io_error == ECKSUM ? |
|
895 |
"bad checksum" : "I/O failure", |
|
896 |
zio_type_name[zio->io_type], |
|
897 |
vdev_description(vd), |
|
898 |
(u_longlong_t)zio->io_offset, |
|
3459
358b6bdb15b6
6512311 zio_done() is chunky and needs to go on a diet
ek110237
parents:
3290
diff
changeset
|
899 |
zio, blkbuf ? blkbuf : "", zio->io_error); |
1544 | 900 |
} |
789 | 901 |
} |
902 |
zio_clear_transform_stack(zio); |
|
903 |
||
904 |
if (zio->io_done) |
|
905 |
zio->io_done(zio); |
|
906 |
||
907 |
ASSERT(zio->io_delegate_list == NULL); |
|
908 |
ASSERT(zio->io_delegate_next == NULL); |
|
909 |
||
910 |
if (pio != NULL) { |
|
911 |
zio_t *next, *prev; |
|
912 |
||
913 |
mutex_enter(&pio->io_lock); |
|
914 |
next = zio->io_sibling_next; |
|
915 |
prev = zio->io_sibling_prev; |
|
916 |
if (next != NULL) |
|
917 |
next->io_sibling_prev = prev; |
|
918 |
if (prev != NULL) |
|
919 |
prev->io_sibling_next = next; |
|
920 |
if (pio->io_child == zio) |
|
921 |
pio->io_child = next; |
|
922 |
mutex_exit(&pio->io_lock); |
|
923 |
||
924 |
zio_notify_parent(zio, ZIO_STAGE_WAIT_CHILDREN_DONE, |
|
925 |
&pio->io_children_notdone); |
|
926 |
} |
|
927 |
||
3463 | 928 |
/* |
929 |
* Note: this I/O is now done, and will shortly be |
|
930 |
* kmem_free()'d, so there is no need to clear this (or any |
|
931 |
* other) flag. |
|
932 |
*/ |
|
933 |
if (zio->io_flags & ZIO_FLAG_CONFIG_GRABBED) |
|
1544 | 934 |
spa_config_exit(spa, zio); |
789 | 935 |
|
936 |
if (zio->io_waiter != NULL) { |
|
937 |
mutex_enter(&zio->io_lock); |
|
938 |
ASSERT(zio->io_stage == ZIO_STAGE_DONE); |
|
939 |
zio->io_stalled = zio->io_stage; |
|
940 |
cv_broadcast(&zio->io_cv); |
|
941 |
mutex_exit(&zio->io_lock); |
|
942 |
} else { |
|
943 |
kmem_free(zio, sizeof (zio_t)); |
|
944 |
} |
|
945 |
} |
|
946 |
||
947 |
/* |
|
948 |
* ========================================================================== |
|
949 |
* Compression support |
|
950 |
* ========================================================================== |
|
951 |
*/ |
|
952 |
static void |
|
953 |
zio_write_compress(zio_t *zio) |
|
954 |
{ |
|
955 |
int compress = zio->io_compress; |
|
956 |
blkptr_t *bp = zio->io_bp; |
|
957 |
void *cbuf; |
|
958 |
uint64_t lsize = zio->io_size; |
|
959 |
uint64_t csize = lsize; |
|
960 |
uint64_t cbufsize = 0; |
|
961 |
int pass; |
|
962 |
||
963 |
if (bp->blk_birth == zio->io_txg) { |
|
964 |
/* |
|
965 |
* We're rewriting an existing block, which means we're |
|
966 |
* working on behalf of spa_sync(). For spa_sync() to |
|
967 |
* converge, it must eventually be the case that we don't |
|
968 |
* have to allocate new blocks. But compression changes |
|
969 |
* the blocksize, which forces a reallocate, and makes |
|
970 |
* convergence take longer. Therefore, after the first |
|
971 |
* few passes, stop compressing to ensure convergence. |
|
972 |
*/ |
|
973 |
pass = spa_sync_pass(zio->io_spa); |
|
974 |
if (pass > zio_sync_pass.zp_dontcompress) |
|
975 |
compress = ZIO_COMPRESS_OFF; |
|
976 |
} else { |
|
977 |
ASSERT(BP_IS_HOLE(bp)); |
|
978 |
pass = 1; |
|
979 |
} |
|
980 |
||
981 |
if (compress != ZIO_COMPRESS_OFF) |
|
982 |
if (!zio_compress_data(compress, zio->io_data, zio->io_size, |
|
983 |
&cbuf, &csize, &cbufsize)) |
|
984 |
compress = ZIO_COMPRESS_OFF; |
|
985 |
||
986 |
if (compress != ZIO_COMPRESS_OFF && csize != 0) |
|
987 |
zio_push_transform(zio, cbuf, csize, cbufsize); |
|
988 |
||
989 |
/* |
|
990 |
* The final pass of spa_sync() must be all rewrites, but the first |
|
991 |
* few passes offer a trade-off: allocating blocks defers convergence, |
|
992 |
* but newly allocated blocks are sequential, so they can be written |
|
993 |
* to disk faster. Therefore, we allow the first few passes of |
|
994 |
* spa_sync() to reallocate new blocks, but force rewrites after that. |
|
995 |
* There should only be a handful of blocks after pass 1 in any case. |
|
996 |
*/ |
|
997 |
if (bp->blk_birth == zio->io_txg && BP_GET_PSIZE(bp) == csize && |
|
998 |
pass > zio_sync_pass.zp_rewrite) { |
|
999 |
ASSERT(csize != 0); |
|
2885 | 1000 |
BP_SET_LSIZE(bp, lsize); |
1001 |
BP_SET_COMPRESS(bp, compress); |
|
789 | 1002 |
zio->io_pipeline = ZIO_REWRITE_PIPELINE; |
1003 |
} else { |
|
1004 |
if (bp->blk_birth == zio->io_txg) { |
|
1005 |
ASSERT3U(BP_GET_LSIZE(bp), ==, lsize); |
|
1006 |
bzero(bp, sizeof (blkptr_t)); |
|
1007 |
} |
|
1008 |
if (csize == 0) { |
|
1009 |
BP_ZERO(bp); |
|
1010 |
zio->io_pipeline = ZIO_WAIT_FOR_CHILDREN_PIPELINE; |
|
1011 |
} else { |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1012 |
ASSERT3U(BP_GET_NDVAS(bp), ==, 0); |
789 | 1013 |
BP_SET_LSIZE(bp, lsize); |
1014 |
BP_SET_PSIZE(bp, csize); |
|
1015 |
BP_SET_COMPRESS(bp, compress); |
|
1016 |
zio->io_pipeline = ZIO_WRITE_ALLOCATE_PIPELINE; |
|
1017 |
} |
|
1018 |
} |
|
1019 |
||
1020 |
zio_next_stage(zio); |
|
1021 |
} |
|
1022 |
||
1023 |
static void |
|
1024 |
zio_read_decompress(zio_t *zio) |
|
1025 |
{ |
|
1026 |
blkptr_t *bp = zio->io_bp; |
|
1027 |
void *data; |
|
1028 |
uint64_t size; |
|
1029 |
uint64_t bufsize; |
|
1030 |
int compress = BP_GET_COMPRESS(bp); |
|
1031 |
||
1032 |
ASSERT(compress != ZIO_COMPRESS_OFF); |
|
1033 |
||
1034 |
zio_pop_transform(zio, &data, &size, &bufsize); |
|
1035 |
||
1036 |
if (zio_decompress_data(compress, data, size, |
|
1037 |
zio->io_data, zio->io_size)) |
|
1038 |
zio->io_error = EIO; |
|
1039 |
||
1040 |
zio_buf_free(data, bufsize); |
|
1041 |
||
1042 |
zio_next_stage(zio); |
|
1043 |
} |
|
1044 |
||
1045 |
/* |
|
1046 |
* ========================================================================== |
|
1047 |
* Gang block support |
|
1048 |
* ========================================================================== |
|
1049 |
*/ |
|
1050 |
static void |
|
1051 |
zio_gang_pipeline(zio_t *zio) |
|
1052 |
{ |
|
1053 |
/* |
|
1054 |
* By default, the pipeline assumes that we're dealing with a gang |
|
1055 |
* block. If we're not, strip out any gang-specific stages. |
|
1056 |
*/ |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1057 |
if (!BP_IS_GANG(zio->io_bp)) |
789 | 1058 |
zio->io_pipeline &= ~ZIO_GANG_STAGES; |
1059 |
||
1060 |
zio_next_stage(zio); |
|
1061 |
} |
|
1062 |
||
1063 |
static void |
|
1064 |
zio_gang_byteswap(zio_t *zio) |
|
1065 |
{ |
|
1066 |
ASSERT(zio->io_size == SPA_GANGBLOCKSIZE); |
|
1067 |
||
1068 |
if (BP_SHOULD_BYTESWAP(zio->io_bp)) |
|
1069 |
byteswap_uint64_array(zio->io_data, zio->io_size); |
|
1070 |
} |
|
1071 |
||
1072 |
static void |
|
1073 |
zio_get_gang_header(zio_t *zio) |
|
1074 |
{ |
|
1075 |
blkptr_t *bp = zio->io_bp; |
|
1076 |
uint64_t gsize = SPA_GANGBLOCKSIZE; |
|
1077 |
void *gbuf = zio_buf_alloc(gsize); |
|
1078 |
||
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1079 |
ASSERT(BP_IS_GANG(bp)); |
789 | 1080 |
|
1081 |
zio_push_transform(zio, gbuf, gsize, gsize); |
|
1082 |
||
1083 |
zio_nowait(zio_create(zio, zio->io_spa, bp->blk_birth, bp, gbuf, gsize, |
|
1084 |
NULL, NULL, ZIO_TYPE_READ, zio->io_priority, |
|
1085 |
zio->io_flags & ZIO_FLAG_GANG_INHERIT, |
|
1086 |
ZIO_STAGE_OPEN, ZIO_READ_PIPELINE)); |
|
1087 |
||
1088 |
zio_wait_children_done(zio); |
|
1089 |
} |
|
1090 |
||
1091 |
static void |
|
1092 |
zio_read_gang_members(zio_t *zio) |
|
1093 |
{ |
|
1094 |
zio_gbh_phys_t *gbh; |
|
1095 |
uint64_t gsize, gbufsize, loff, lsize; |
|
1096 |
int i; |
|
1097 |
||
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1098 |
ASSERT(BP_IS_GANG(zio->io_bp)); |
789 | 1099 |
|
1100 |
zio_gang_byteswap(zio); |
|
1101 |
zio_pop_transform(zio, (void **)&gbh, &gsize, &gbufsize); |
|
1102 |
||
1103 |
for (loff = 0, i = 0; loff != zio->io_size; loff += lsize, i++) { |
|
1104 |
blkptr_t *gbp = &gbh->zg_blkptr[i]; |
|
1105 |
lsize = BP_GET_PSIZE(gbp); |
|
1106 |
||
1107 |
ASSERT(BP_GET_COMPRESS(gbp) == ZIO_COMPRESS_OFF); |
|
1108 |
ASSERT3U(lsize, ==, BP_GET_LSIZE(gbp)); |
|
1109 |
ASSERT3U(loff + lsize, <=, zio->io_size); |
|
1110 |
ASSERT(i < SPA_GBH_NBLKPTRS); |
|
1111 |
ASSERT(!BP_IS_HOLE(gbp)); |
|
1112 |
||
1113 |
zio_nowait(zio_read(zio, zio->io_spa, gbp, |
|
1114 |
(char *)zio->io_data + loff, lsize, NULL, NULL, |
|
1544 | 1115 |
zio->io_priority, zio->io_flags & ZIO_FLAG_GANG_INHERIT, |
1116 |
&zio->io_bookmark)); |
|
789 | 1117 |
} |
1118 |
||
1119 |
zio_buf_free(gbh, gbufsize); |
|
1120 |
zio_wait_children_done(zio); |
|
1121 |
} |
|
1122 |
||
1123 |
static void |
|
1124 |
zio_rewrite_gang_members(zio_t *zio) |
|
1125 |
{ |
|
1126 |
zio_gbh_phys_t *gbh; |
|
1127 |
uint64_t gsize, gbufsize, loff, lsize; |
|
1128 |
int i; |
|
1129 |
||
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1130 |
ASSERT(BP_IS_GANG(zio->io_bp)); |
789 | 1131 |
ASSERT3U(zio->io_size, ==, SPA_GANGBLOCKSIZE); |
1132 |
||
1133 |
zio_gang_byteswap(zio); |
|
1134 |
zio_pop_transform(zio, (void **)&gbh, &gsize, &gbufsize); |
|
1135 |
||
1136 |
ASSERT(gsize == gbufsize); |
|
1137 |
||
1138 |
for (loff = 0, i = 0; loff != zio->io_size; loff += lsize, i++) { |
|
1139 |
blkptr_t *gbp = &gbh->zg_blkptr[i]; |
|
1140 |
lsize = BP_GET_PSIZE(gbp); |
|
1141 |
||
1142 |
ASSERT(BP_GET_COMPRESS(gbp) == ZIO_COMPRESS_OFF); |
|
1143 |
ASSERT3U(lsize, ==, BP_GET_LSIZE(gbp)); |
|
1144 |
ASSERT3U(loff + lsize, <=, zio->io_size); |
|
1145 |
ASSERT(i < SPA_GBH_NBLKPTRS); |
|
1146 |
ASSERT(!BP_IS_HOLE(gbp)); |
|
1147 |
||
1148 |
zio_nowait(zio_rewrite(zio, zio->io_spa, zio->io_checksum, |
|
1149 |
zio->io_txg, gbp, (char *)zio->io_data + loff, lsize, |
|
1544 | 1150 |
NULL, NULL, zio->io_priority, zio->io_flags, |
1151 |
&zio->io_bookmark)); |
|
789 | 1152 |
} |
1153 |
||
1154 |
zio_push_transform(zio, gbh, gsize, gbufsize); |
|
1155 |
zio_wait_children_ready(zio); |
|
1156 |
} |
|
1157 |
||
1158 |
static void |
|
1159 |
zio_free_gang_members(zio_t *zio) |
|
1160 |
{ |
|
1161 |
zio_gbh_phys_t *gbh; |
|
1162 |
uint64_t gsize, gbufsize; |
|
1163 |
int i; |
|
1164 |
||
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1165 |
ASSERT(BP_IS_GANG(zio->io_bp)); |
789 | 1166 |
|
1167 |
zio_gang_byteswap(zio); |
|
1168 |
zio_pop_transform(zio, (void **)&gbh, &gsize, &gbufsize); |
|
1169 |
||
1170 |
for (i = 0; i < SPA_GBH_NBLKPTRS; i++) { |
|
1171 |
blkptr_t *gbp = &gbh->zg_blkptr[i]; |
|
1172 |
||
1173 |
if (BP_IS_HOLE(gbp)) |
|
1174 |
continue; |
|
1175 |
zio_nowait(zio_free(zio, zio->io_spa, zio->io_txg, |
|
1176 |
gbp, NULL, NULL)); |
|
1177 |
} |
|
1178 |
||
1179 |
zio_buf_free(gbh, gbufsize); |
|
1180 |
zio_next_stage(zio); |
|
1181 |
} |
|
1182 |
||
1183 |
static void |
|
1184 |
zio_claim_gang_members(zio_t *zio) |
|
1185 |
{ |
|
1186 |
zio_gbh_phys_t *gbh; |
|
1187 |
uint64_t gsize, gbufsize; |
|
1188 |
int i; |
|
1189 |
||
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1190 |
ASSERT(BP_IS_GANG(zio->io_bp)); |
789 | 1191 |
|
1192 |
zio_gang_byteswap(zio); |
|
1193 |
zio_pop_transform(zio, (void **)&gbh, &gsize, &gbufsize); |
|
1194 |
||
1195 |
for (i = 0; i < SPA_GBH_NBLKPTRS; i++) { |
|
1196 |
blkptr_t *gbp = &gbh->zg_blkptr[i]; |
|
1197 |
if (BP_IS_HOLE(gbp)) |
|
1198 |
continue; |
|
1199 |
zio_nowait(zio_claim(zio, zio->io_spa, zio->io_txg, |
|
1200 |
gbp, NULL, NULL)); |
|
1201 |
} |
|
1202 |
||
1203 |
zio_buf_free(gbh, gbufsize); |
|
1204 |
zio_next_stage(zio); |
|
1205 |
} |
|
1206 |
||
1207 |
static void |
|
1208 |
zio_write_allocate_gang_member_done(zio_t *zio) |
|
1209 |
{ |
|
1210 |
zio_t *pio = zio->io_parent; |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1211 |
dva_t *cdva = zio->io_bp->blk_dva; |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1212 |
dva_t *pdva = pio->io_bp->blk_dva; |
789 | 1213 |
uint64_t asize; |
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1214 |
int d; |
789 | 1215 |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1216 |
ASSERT3U(pio->io_ndvas, ==, zio->io_ndvas); |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1217 |
ASSERT3U(BP_GET_NDVAS(zio->io_bp), <=, BP_GET_NDVAS(pio->io_bp)); |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1218 |
ASSERT3U(zio->io_ndvas, <=, BP_GET_NDVAS(zio->io_bp)); |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1219 |
ASSERT3U(pio->io_ndvas, <=, BP_GET_NDVAS(pio->io_bp)); |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1220 |
|
789 | 1221 |
mutex_enter(&pio->io_lock); |
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1222 |
for (d = 0; d < BP_GET_NDVAS(pio->io_bp); d++) { |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1223 |
ASSERT(DVA_GET_GANG(&pdva[d])); |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1224 |
asize = DVA_GET_ASIZE(&pdva[d]); |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1225 |
asize += DVA_GET_ASIZE(&cdva[d]); |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1226 |
DVA_SET_ASIZE(&pdva[d], asize); |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1227 |
} |
789 | 1228 |
mutex_exit(&pio->io_lock); |
1229 |
} |
|
1230 |
||
1231 |
static void |
|
1232 |
zio_write_allocate_gang_members(zio_t *zio) |
|
1233 |
{ |
|
1234 |
blkptr_t *bp = zio->io_bp; |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1235 |
dva_t *dva = bp->blk_dva; |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1236 |
spa_t *spa = zio->io_spa; |
789 | 1237 |
zio_gbh_phys_t *gbh; |
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1238 |
uint64_t txg = zio->io_txg; |
789 | 1239 |
uint64_t resid = zio->io_size; |
1240 |
uint64_t maxalloc = P2ROUNDUP(zio->io_size >> 1, SPA_MINBLOCKSIZE); |
|
1241 |
uint64_t gsize, loff, lsize; |
|
1242 |
uint32_t gbps_left; |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1243 |
int ndvas = zio->io_ndvas; |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1244 |
int gbh_ndvas = MIN(ndvas + 1, spa_max_replication(spa)); |
789 | 1245 |
int error; |
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1246 |
int i, d; |
789 | 1247 |
|
1248 |
gsize = SPA_GANGBLOCKSIZE; |
|
1249 |
gbps_left = SPA_GBH_NBLKPTRS; |
|
1250 |
||
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2981
diff
changeset
|
1251 |
error = metaslab_alloc(spa, gsize, bp, gbh_ndvas, txg, NULL, B_FALSE); |
789 | 1252 |
if (error == ENOSPC) |
1253 |
panic("can't allocate gang block header"); |
|
1254 |
ASSERT(error == 0); |
|
1255 |
||
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1256 |
for (d = 0; d < gbh_ndvas; d++) |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1257 |
DVA_SET_GANG(&dva[d], 1); |
789 | 1258 |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1259 |
bp->blk_birth = txg; |
789 | 1260 |
|
1261 |
gbh = zio_buf_alloc(gsize); |
|
1262 |
bzero(gbh, gsize); |
|
1263 |
||
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1264 |
/* We need to test multi-level gang blocks */ |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1265 |
if (maxalloc >= zio_gang_bang && (lbolt & 0x1) == 0) |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1266 |
maxalloc = MAX(maxalloc >> 2, SPA_MINBLOCKSIZE); |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1267 |
|
789 | 1268 |
for (loff = 0, i = 0; loff != zio->io_size; |
1269 |
loff += lsize, resid -= lsize, gbps_left--, i++) { |
|
1270 |
blkptr_t *gbp = &gbh->zg_blkptr[i]; |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1271 |
dva = gbp->blk_dva; |
789 | 1272 |
|
1273 |
ASSERT(gbps_left != 0); |
|
1274 |
maxalloc = MIN(maxalloc, resid); |
|
1275 |
||
1276 |
while (resid <= maxalloc * gbps_left) { |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1277 |
error = metaslab_alloc(spa, maxalloc, gbp, ndvas, |
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2981
diff
changeset
|
1278 |
txg, bp, B_FALSE); |
789 | 1279 |
if (error == 0) |
1280 |
break; |
|
1281 |
ASSERT3U(error, ==, ENOSPC); |
|
1282 |
if (maxalloc == SPA_MINBLOCKSIZE) |
|
1283 |
panic("really out of space"); |
|
1284 |
maxalloc = P2ROUNDUP(maxalloc >> 1, SPA_MINBLOCKSIZE); |
|
1285 |
} |
|
1286 |
||
1287 |
if (resid <= maxalloc * gbps_left) { |
|
1288 |
lsize = maxalloc; |
|
1289 |
BP_SET_LSIZE(gbp, lsize); |
|
1290 |
BP_SET_PSIZE(gbp, lsize); |
|
1291 |
BP_SET_COMPRESS(gbp, ZIO_COMPRESS_OFF); |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1292 |
gbp->blk_birth = txg; |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1293 |
zio_nowait(zio_rewrite(zio, spa, |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1294 |
zio->io_checksum, txg, gbp, |
789 | 1295 |
(char *)zio->io_data + loff, lsize, |
1296 |
zio_write_allocate_gang_member_done, NULL, |
|
1544 | 1297 |
zio->io_priority, zio->io_flags, |
1298 |
&zio->io_bookmark)); |
|
789 | 1299 |
} else { |
1300 |
lsize = P2ROUNDUP(resid / gbps_left, SPA_MINBLOCKSIZE); |
|
1301 |
ASSERT(lsize != SPA_MINBLOCKSIZE); |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1302 |
zio_nowait(zio_write_allocate(zio, spa, |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1303 |
zio->io_checksum, txg, gbp, |
789 | 1304 |
(char *)zio->io_data + loff, lsize, |
1305 |
zio_write_allocate_gang_member_done, NULL, |
|
1306 |
zio->io_priority, zio->io_flags)); |
|
1307 |
} |
|
1308 |
} |
|
1309 |
||
1310 |
ASSERT(resid == 0 && loff == zio->io_size); |
|
1311 |
||
1312 |
zio->io_pipeline |= 1U << ZIO_STAGE_GANG_CHECKSUM_GENERATE; |
|
1313 |
||
1314 |
zio_push_transform(zio, gbh, gsize, gsize); |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1315 |
/* |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1316 |
* As much as we'd like this to be zio_wait_children_ready(), |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1317 |
* updating our ASIZE doesn't happen until the io_done callback, |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1318 |
* so we have to wait for that to finish in order for our BP |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1319 |
* to be stable. |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1320 |
*/ |
789 | 1321 |
zio_wait_children_done(zio); |
1322 |
} |
|
1323 |
||
1324 |
/* |
|
1325 |
* ========================================================================== |
|
1326 |
* Allocate and free blocks |
|
1327 |
* ========================================================================== |
|
1328 |
*/ |
|
1329 |
static void |
|
1330 |
zio_dva_allocate(zio_t *zio) |
|
1331 |
{ |
|
1332 |
blkptr_t *bp = zio->io_bp; |
|
1333 |
int error; |
|
1334 |
||
1335 |
ASSERT(BP_IS_HOLE(bp)); |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1336 |
ASSERT3U(BP_GET_NDVAS(bp), ==, 0); |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1337 |
ASSERT3U(zio->io_ndvas, >, 0); |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1338 |
ASSERT3U(zio->io_ndvas, <=, spa_max_replication(zio->io_spa)); |
789 | 1339 |
|
1340 |
/* For testing, make some blocks above a certain size be gang blocks */ |
|
1341 |
if (zio->io_size >= zio_gang_bang && (lbolt & 0x3) == 0) { |
|
1342 |
zio_write_allocate_gang_members(zio); |
|
1343 |
return; |
|
1344 |
} |
|
1345 |
||
1346 |
ASSERT3U(zio->io_size, ==, BP_GET_PSIZE(bp)); |
|
1347 |
||
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1348 |
error = metaslab_alloc(zio->io_spa, zio->io_size, bp, zio->io_ndvas, |
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2981
diff
changeset
|
1349 |
zio->io_txg, NULL, B_FALSE); |
789 | 1350 |
|
1351 |
if (error == 0) { |
|
1352 |
bp->blk_birth = zio->io_txg; |
|
1353 |
} else if (error == ENOSPC) { |
|
1354 |
if (zio->io_size == SPA_MINBLOCKSIZE) |
|
1355 |
panic("really, truly out of space"); |
|
1356 |
zio_write_allocate_gang_members(zio); |
|
1357 |
return; |
|
1358 |
} else { |
|
1359 |
zio->io_error = error; |
|
1360 |
} |
|
1361 |
zio_next_stage(zio); |
|
1362 |
} |
|
1363 |
||
1364 |
static void |
|
1365 |
zio_dva_free(zio_t *zio) |
|
1366 |
{ |
|
1367 |
blkptr_t *bp = zio->io_bp; |
|
1368 |
||
1807
35c8b566d7af
6410711 intent log blocks don't get invited to pool parties
bonwick
parents:
1775
diff
changeset
|
1369 |
metaslab_free(zio->io_spa, bp, zio->io_txg, B_FALSE); |
789 | 1370 |
|
1371 |
BP_ZERO(bp); |
|
1372 |
||
1373 |
zio_next_stage(zio); |
|
1374 |
} |
|
1375 |
||
1376 |
static void |
|
1377 |
zio_dva_claim(zio_t *zio) |
|
1378 |
{ |
|
1807
35c8b566d7af
6410711 intent log blocks don't get invited to pool parties
bonwick
parents:
1775
diff
changeset
|
1379 |
zio->io_error = metaslab_claim(zio->io_spa, zio->io_bp, zio->io_txg); |
789 | 1380 |
|
1381 |
zio_next_stage(zio); |
|
1382 |
} |
|
1383 |
||
1384 |
/* |
|
1385 |
* ========================================================================== |
|
1386 |
* Read and write to physical devices |
|
1387 |
* ========================================================================== |
|
1388 |
*/ |
|
1389 |
||
1390 |
static void |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1391 |
zio_vdev_io_start(zio_t *zio) |
789 | 1392 |
{ |
1393 |
vdev_t *vd = zio->io_vd; |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1394 |
vdev_t *tvd = vd ? vd->vdev_top : NULL; |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1395 |
blkptr_t *bp = zio->io_bp; |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1396 |
uint64_t align; |
789 | 1397 |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1398 |
if (vd == NULL) { |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1399 |
/* The mirror_ops handle multiple DVAs in a single BP */ |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1400 |
vdev_mirror_ops.vdev_op_io_start(zio); |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1401 |
return; |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1402 |
} |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1403 |
|
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1404 |
align = 1ULL << tvd->vdev_ashift; |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1405 |
|
1732 | 1406 |
if (zio->io_retries == 0 && vd == tvd) |
789 | 1407 |
zio->io_flags |= ZIO_FLAG_FAILFAST; |
1408 |
||
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1409 |
if (!(zio->io_flags & ZIO_FLAG_PHYSICAL) && |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1410 |
vd->vdev_children == 0) { |
789 | 1411 |
zio->io_flags |= ZIO_FLAG_PHYSICAL; |
1412 |
zio->io_offset += VDEV_LABEL_START_SIZE; |
|
1413 |
} |
|
1414 |
||
1732 | 1415 |
if (P2PHASE(zio->io_size, align) != 0) { |
1416 |
uint64_t asize = P2ROUNDUP(zio->io_size, align); |
|
1417 |
char *abuf = zio_buf_alloc(asize); |
|
1418 |
ASSERT(vd == tvd); |
|
1419 |
if (zio->io_type == ZIO_TYPE_WRITE) { |
|
1420 |
bcopy(zio->io_data, abuf, zio->io_size); |
|
1421 |
bzero(abuf + zio->io_size, asize - zio->io_size); |
|
1422 |
} |
|
1423 |
zio_push_transform(zio, abuf, asize, asize); |
|
1424 |
ASSERT(!(zio->io_flags & ZIO_FLAG_SUBBLOCK)); |
|
1425 |
zio->io_flags |= ZIO_FLAG_SUBBLOCK; |
|
1426 |
} |
|
1427 |
||
1428 |
ASSERT(P2PHASE(zio->io_offset, align) == 0); |
|
1429 |
ASSERT(P2PHASE(zio->io_size, align) == 0); |
|
1430 |
ASSERT(bp == NULL || |
|
1431 |
P2ROUNDUP(ZIO_GET_IOSIZE(zio), align) == zio->io_size); |
|
789 | 1432 |
ASSERT(zio->io_type != ZIO_TYPE_WRITE || (spa_mode & FWRITE)); |
1433 |
||
1434 |
vdev_io_start(zio); |
|
1435 |
||
1436 |
/* zio_next_stage_async() gets called from io completion interrupt */ |
|
1437 |
} |
|
1438 |
||
1439 |
static void |
|
1440 |
zio_vdev_io_done(zio_t *zio) |
|
1441 |
{ |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1442 |
if (zio->io_vd == NULL) |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1443 |
/* The mirror_ops handle multiple DVAs in a single BP */ |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1444 |
vdev_mirror_ops.vdev_op_io_done(zio); |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1445 |
else |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1446 |
vdev_io_done(zio); |
789 | 1447 |
} |
1448 |
||
1449 |
/* XXPOLICY */ |
|
1544 | 1450 |
boolean_t |
789 | 1451 |
zio_should_retry(zio_t *zio) |
1452 |
{ |
|
1453 |
vdev_t *vd = zio->io_vd; |
|
1454 |
||
1455 |
if (zio->io_error == 0) |
|
1456 |
return (B_FALSE); |
|
1457 |
if (zio->io_delegate_list != NULL) |
|
1458 |
return (B_FALSE); |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1459 |
if (vd && vd != vd->vdev_top) |
789 | 1460 |
return (B_FALSE); |
1461 |
if (zio->io_flags & ZIO_FLAG_DONT_RETRY) |
|
1462 |
return (B_FALSE); |
|
1544 | 1463 |
if (zio->io_retries > 0) |
789 | 1464 |
return (B_FALSE); |
1465 |
||
1466 |
return (B_TRUE); |
|
1467 |
} |
|
1468 |
||
1469 |
static void |
|
1470 |
zio_vdev_io_assess(zio_t *zio) |
|
1471 |
{ |
|
1472 |
vdev_t *vd = zio->io_vd; |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1473 |
vdev_t *tvd = vd ? vd->vdev_top : NULL; |
789 | 1474 |
|
1544 | 1475 |
ASSERT(zio->io_vsd == NULL); |
789 | 1476 |
|
1732 | 1477 |
if (zio->io_flags & ZIO_FLAG_SUBBLOCK) { |
1478 |
void *abuf; |
|
1479 |
uint64_t asize; |
|
1480 |
ASSERT(vd == tvd); |
|
1481 |
zio_pop_transform(zio, &abuf, &asize, &asize); |
|
1482 |
if (zio->io_type == ZIO_TYPE_READ) |
|
1483 |
bcopy(abuf, zio->io_data, zio->io_size); |
|
1484 |
zio_buf_free(abuf, asize); |
|
1485 |
zio->io_flags &= ~ZIO_FLAG_SUBBLOCK; |
|
1486 |
} |
|
1487 |
||
1544 | 1488 |
if (zio_injection_enabled && !zio->io_error) |
1489 |
zio->io_error = zio_handle_fault_injection(zio, EIO); |
|
789 | 1490 |
|
1491 |
/* |
|
1492 |
* If the I/O failed, determine whether we should attempt to retry it. |
|
1493 |
*/ |
|
1494 |
/* XXPOLICY */ |
|
1495 |
if (zio_should_retry(zio)) { |
|
1496 |
ASSERT(tvd == vd); |
|
1497 |
||
1498 |
zio->io_retries++; |
|
1499 |
zio->io_error = 0; |
|
3463 | 1500 |
zio->io_flags &= ZIO_FLAG_VDEV_INHERIT | |
1501 |
ZIO_FLAG_CONFIG_GRABBED; |
|
789 | 1502 |
/* XXPOLICY */ |
1503 |
zio->io_flags &= ~ZIO_FLAG_FAILFAST; |
|
1504 |
zio->io_flags |= ZIO_FLAG_DONT_CACHE; |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1505 |
zio->io_stage = ZIO_STAGE_VDEV_IO_START - 1; |
789 | 1506 |
|
1507 |
dprintf("retry #%d for %s to %s offset %llx\n", |
|
1508 |
zio->io_retries, zio_type_name[zio->io_type], |
|
1509 |
vdev_description(vd), zio->io_offset); |
|
1510 |
||
1544 | 1511 |
zio_next_stage_async(zio); |
1512 |
return; |
|
1513 |
} |
|
789 | 1514 |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1515 |
if (zio->io_error != 0 && zio->io_error != ECKSUM && |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1516 |
!(zio->io_flags & ZIO_FLAG_SPECULATIVE) && vd) { |
789 | 1517 |
/* |
1544 | 1518 |
* Poor man's hotplug support. Even if we're done retrying this |
1519 |
* I/O, try to reopen the vdev to see if it's still attached. |
|
1520 |
* To avoid excessive thrashing, we only try it once a minute. |
|
1521 |
* This also has the effect of detecting when missing devices |
|
1522 |
* have come back, by polling the device once a minute. |
|
1523 |
* |
|
1524 |
* We need to do this asynchronously because we can't grab |
|
1525 |
* all the necessary locks way down here. |
|
789 | 1526 |
*/ |
1544 | 1527 |
if (gethrtime() - vd->vdev_last_try > 60ULL * NANOSEC) { |
1528 |
vd->vdev_last_try = gethrtime(); |
|
1529 |
tvd->vdev_reopen_wanted = 1; |
|
1530 |
spa_async_request(vd->vdev_spa, SPA_ASYNC_REOPEN); |
|
1531 |
} |
|
789 | 1532 |
} |
1533 |
||
1534 |
zio_next_stage(zio); |
|
1535 |
} |
|
1536 |
||
1537 |
void |
|
1538 |
zio_vdev_io_reissue(zio_t *zio) |
|
1539 |
{ |
|
1540 |
ASSERT(zio->io_stage == ZIO_STAGE_VDEV_IO_START); |
|
1541 |
ASSERT(zio->io_error == 0); |
|
1542 |
||
1543 |
zio->io_stage--; |
|
1544 |
} |
|
1545 |
||
1546 |
void |
|
1547 |
zio_vdev_io_redone(zio_t *zio) |
|
1548 |
{ |
|
1549 |
ASSERT(zio->io_stage == ZIO_STAGE_VDEV_IO_DONE); |
|
1550 |
||
1551 |
zio->io_stage--; |
|
1552 |
} |
|
1553 |
||
1554 |
void |
|
1555 |
zio_vdev_io_bypass(zio_t *zio) |
|
1556 |
{ |
|
1557 |
ASSERT(zio->io_stage == ZIO_STAGE_VDEV_IO_START); |
|
1558 |
ASSERT(zio->io_error == 0); |
|
1559 |
||
1560 |
zio->io_flags |= ZIO_FLAG_IO_BYPASS; |
|
1561 |
zio->io_stage = ZIO_STAGE_VDEV_IO_ASSESS - 1; |
|
1562 |
} |
|
1563 |
||
1564 |
/* |
|
1565 |
* ========================================================================== |
|
1566 |
* Generate and verify checksums |
|
1567 |
* ========================================================================== |
|
1568 |
*/ |
|
1569 |
static void |
|
1570 |
zio_checksum_generate(zio_t *zio) |
|
1571 |
{ |
|
1572 |
int checksum = zio->io_checksum; |
|
1573 |
blkptr_t *bp = zio->io_bp; |
|
1574 |
||
1575 |
ASSERT3U(zio->io_size, ==, BP_GET_PSIZE(bp)); |
|
1576 |
||
1577 |
BP_SET_CHECKSUM(bp, checksum); |
|
1578 |
BP_SET_BYTEORDER(bp, ZFS_HOST_BYTEORDER); |
|
1579 |
||
1580 |
zio_checksum(checksum, &bp->blk_cksum, zio->io_data, zio->io_size); |
|
1581 |
||
1582 |
zio_next_stage(zio); |
|
1583 |
} |
|
1584 |
||
1585 |
static void |
|
1586 |
zio_gang_checksum_generate(zio_t *zio) |
|
1587 |
{ |
|
1588 |
zio_cksum_t zc; |
|
1589 |
zio_gbh_phys_t *gbh = zio->io_data; |
|
1590 |
||
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1591 |
ASSERT(BP_IS_GANG(zio->io_bp)); |
789 | 1592 |
ASSERT3U(zio->io_size, ==, SPA_GANGBLOCKSIZE); |
1593 |
||
1594 |
zio_set_gang_verifier(zio, &gbh->zg_tail.zbt_cksum); |
|
1595 |
||
1596 |
zio_checksum(ZIO_CHECKSUM_GANG_HEADER, &zc, zio->io_data, zio->io_size); |
|
1597 |
||
1598 |
zio_next_stage(zio); |
|
1599 |
} |
|
1600 |
||
1601 |
static void |
|
1602 |
zio_checksum_verify(zio_t *zio) |
|
1603 |
{ |
|
1604 |
if (zio->io_bp != NULL) { |
|
1605 |
zio->io_error = zio_checksum_error(zio); |
|
1544 | 1606 |
if (zio->io_error && !(zio->io_flags & ZIO_FLAG_SPECULATIVE)) |
1607 |
zfs_ereport_post(FM_EREPORT_ZFS_CHECKSUM, |
|
1608 |
zio->io_spa, zio->io_vd, zio, 0, 0); |
|
789 | 1609 |
} |
1610 |
||
1611 |
zio_next_stage(zio); |
|
1612 |
} |
|
1613 |
||
1614 |
/* |
|
1615 |
* Called by RAID-Z to ensure we don't compute the checksum twice. |
|
1616 |
*/ |
|
1617 |
void |
|
1618 |
zio_checksum_verified(zio_t *zio) |
|
1619 |
{ |
|
1620 |
zio->io_pipeline &= ~(1U << ZIO_STAGE_CHECKSUM_VERIFY); |
|
1621 |
} |
|
1622 |
||
1623 |
/* |
|
1624 |
* Set the external verifier for a gang block based on stuff in the bp |
|
1625 |
*/ |
|
1626 |
void |
|
1627 |
zio_set_gang_verifier(zio_t *zio, zio_cksum_t *zcp) |
|
1628 |
{ |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1629 |
blkptr_t *bp = zio->io_bp; |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1630 |
|
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1631 |
zcp->zc_word[0] = DVA_GET_VDEV(BP_IDENTITY(bp)); |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1632 |
zcp->zc_word[1] = DVA_GET_OFFSET(BP_IDENTITY(bp)); |
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1633 |
zcp->zc_word[2] = bp->blk_birth; |
789 | 1634 |
zcp->zc_word[3] = 0; |
1635 |
} |
|
1636 |
||
1637 |
/* |
|
1638 |
* ========================================================================== |
|
1639 |
* Define the pipeline |
|
1640 |
* ========================================================================== |
|
1641 |
*/ |
|
1642 |
typedef void zio_pipe_stage_t(zio_t *zio); |
|
1643 |
||
1644 |
static void |
|
1645 |
zio_badop(zio_t *zio) |
|
1646 |
{ |
|
1647 |
panic("Invalid I/O pipeline stage %u for zio %p", zio->io_stage, zio); |
|
1648 |
} |
|
1649 |
||
1650 |
zio_pipe_stage_t *zio_pipeline[ZIO_STAGE_DONE + 2] = { |
|
1651 |
zio_badop, |
|
1652 |
zio_wait_children_ready, |
|
1653 |
zio_write_compress, |
|
1654 |
zio_checksum_generate, |
|
1655 |
zio_gang_pipeline, |
|
1656 |
zio_get_gang_header, |
|
1657 |
zio_rewrite_gang_members, |
|
1658 |
zio_free_gang_members, |
|
1659 |
zio_claim_gang_members, |
|
1660 |
zio_dva_allocate, |
|
1661 |
zio_dva_free, |
|
1662 |
zio_dva_claim, |
|
1663 |
zio_gang_checksum_generate, |
|
1664 |
zio_ready, |
|
1665 |
zio_vdev_io_start, |
|
1666 |
zio_vdev_io_done, |
|
1667 |
zio_vdev_io_assess, |
|
1668 |
zio_wait_children_done, |
|
1669 |
zio_checksum_verify, |
|
1670 |
zio_read_gang_members, |
|
1671 |
zio_read_decompress, |
|
1672 |
zio_done, |
|
1673 |
zio_badop |
|
1674 |
}; |
|
1675 |
||
1676 |
/* |
|
1677 |
* Move an I/O to the next stage of the pipeline and execute that stage. |
|
1678 |
* There's no locking on io_stage because there's no legitimate way for |
|
1679 |
* multiple threads to be attempting to process the same I/O. |
|
1680 |
*/ |
|
1681 |
void |
|
1682 |
zio_next_stage(zio_t *zio) |
|
1683 |
{ |
|
1684 |
uint32_t pipeline = zio->io_pipeline; |
|
1685 |
||
1686 |
ASSERT(!MUTEX_HELD(&zio->io_lock)); |
|
1687 |
||
1688 |
if (zio->io_error) { |
|
1689 |
dprintf("zio %p vdev %s offset %llx stage %d error %d\n", |
|
1690 |
zio, vdev_description(zio->io_vd), |
|
1691 |
zio->io_offset, zio->io_stage, zio->io_error); |
|
1692 |
if (((1U << zio->io_stage) & ZIO_VDEV_IO_PIPELINE) == 0) |
|
1693 |
pipeline &= ZIO_ERROR_PIPELINE_MASK; |
|
1694 |
} |
|
1695 |
||
1696 |
while (((1U << ++zio->io_stage) & pipeline) == 0) |
|
1697 |
continue; |
|
1698 |
||
1699 |
ASSERT(zio->io_stage <= ZIO_STAGE_DONE); |
|
1700 |
ASSERT(zio->io_stalled == 0); |
|
1701 |
||
1702 |
zio_pipeline[zio->io_stage](zio); |
|
1703 |
} |
|
1704 |
||
1705 |
void |
|
1706 |
zio_next_stage_async(zio_t *zio) |
|
1707 |
{ |
|
1708 |
taskq_t *tq; |
|
1709 |
uint32_t pipeline = zio->io_pipeline; |
|
1710 |
||
1711 |
ASSERT(!MUTEX_HELD(&zio->io_lock)); |
|
1712 |
||
1713 |
if (zio->io_error) { |
|
1714 |
dprintf("zio %p vdev %s offset %llx stage %d error %d\n", |
|
1715 |
zio, vdev_description(zio->io_vd), |
|
1716 |
zio->io_offset, zio->io_stage, zio->io_error); |
|
1717 |
if (((1U << zio->io_stage) & ZIO_VDEV_IO_PIPELINE) == 0) |
|
1718 |
pipeline &= ZIO_ERROR_PIPELINE_MASK; |
|
1719 |
} |
|
1720 |
||
1721 |
while (((1U << ++zio->io_stage) & pipeline) == 0) |
|
1722 |
continue; |
|
1723 |
||
1724 |
ASSERT(zio->io_stage <= ZIO_STAGE_DONE); |
|
1725 |
ASSERT(zio->io_stalled == 0); |
|
1726 |
||
1727 |
/* |
|
1728 |
* For performance, we'll probably want two sets of task queues: |
|
1729 |
* per-CPU issue taskqs and per-CPU completion taskqs. The per-CPU |
|
1730 |
* part is for read performance: since we have to make a pass over |
|
1731 |
* the data to checksum it anyway, we want to do this on the same CPU |
|
1732 |
* that issued the read, because (assuming CPU scheduling affinity) |
|
1733 |
* that thread is probably still there. Getting this optimization |
|
1734 |
* right avoids performance-hostile cache-to-cache transfers. |
|
1735 |
* |
|
1736 |
* Note that having two sets of task queues is also necessary for |
|
1737 |
* correctness: if all of the issue threads get bogged down waiting |
|
1738 |
* for dependent reads (e.g. metaslab freelist) to complete, then |
|
1739 |
* there won't be any threads available to service I/O completion |
|
1740 |
* interrupts. |
|
1741 |
*/ |
|
1742 |
if ((1U << zio->io_stage) & zio->io_async_stages) { |
|
1743 |
if (zio->io_stage < ZIO_STAGE_VDEV_IO_DONE) |
|
1744 |
tq = zio->io_spa->spa_zio_issue_taskq[zio->io_type]; |
|
1745 |
else |
|
1746 |
tq = zio->io_spa->spa_zio_intr_taskq[zio->io_type]; |
|
1747 |
(void) taskq_dispatch(tq, |
|
1748 |
(task_func_t *)zio_pipeline[zio->io_stage], zio, TQ_SLEEP); |
|
1749 |
} else { |
|
1750 |
zio_pipeline[zio->io_stage](zio); |
|
1751 |
} |
|
1752 |
} |
|
1753 |
||
1754 |
/* |
|
1755 |
* Try to allocate an intent log block. Return 0 on success, errno on failure. |
|
1756 |
*/ |
|
1757 |
int |
|
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2981
diff
changeset
|
1758 |
zio_alloc_blk(spa_t *spa, uint64_t size, blkptr_t *new_bp, blkptr_t *old_bp, |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2981
diff
changeset
|
1759 |
uint64_t txg) |
789 | 1760 |
{ |
1761 |
int error; |
|
1762 |
||
1544 | 1763 |
spa_config_enter(spa, RW_READER, FTAG); |
789 | 1764 |
|
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2981
diff
changeset
|
1765 |
/* |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2981
diff
changeset
|
1766 |
* We were passed the previous log blocks dva_t in bp->blk_dva[0]. |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2981
diff
changeset
|
1767 |
*/ |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2981
diff
changeset
|
1768 |
error = metaslab_alloc(spa, size, new_bp, 1, txg, old_bp, B_TRUE); |
789 | 1769 |
|
1770 |
if (error == 0) { |
|
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2981
diff
changeset
|
1771 |
BP_SET_LSIZE(new_bp, size); |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2981
diff
changeset
|
1772 |
BP_SET_PSIZE(new_bp, size); |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2981
diff
changeset
|
1773 |
BP_SET_COMPRESS(new_bp, ZIO_COMPRESS_OFF); |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2981
diff
changeset
|
1774 |
BP_SET_CHECKSUM(new_bp, ZIO_CHECKSUM_ZILOG); |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2981
diff
changeset
|
1775 |
BP_SET_TYPE(new_bp, DMU_OT_INTENT_LOG); |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2981
diff
changeset
|
1776 |
BP_SET_LEVEL(new_bp, 0); |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2981
diff
changeset
|
1777 |
BP_SET_BYTEORDER(new_bp, ZFS_HOST_BYTEORDER); |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2981
diff
changeset
|
1778 |
new_bp->blk_birth = txg; |
789 | 1779 |
} |
1780 |
||
1544 | 1781 |
spa_config_exit(spa, FTAG); |
789 | 1782 |
|
1783 |
return (error); |
|
1784 |
} |
|
1785 |
||
1786 |
/* |
|
1787 |
* Free an intent log block. We know it can't be a gang block, so there's |
|
1788 |
* nothing to do except metaslab_free() it. |
|
1789 |
*/ |
|
1790 |
void |
|
1791 |
zio_free_blk(spa_t *spa, blkptr_t *bp, uint64_t txg) |
|
1792 |
{ |
|
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
billm
parents:
1732
diff
changeset
|
1793 |
ASSERT(!BP_IS_GANG(bp)); |
789 | 1794 |
|
1544 | 1795 |
spa_config_enter(spa, RW_READER, FTAG); |
789 | 1796 |
|
1807
35c8b566d7af
6410711 intent log blocks don't get invited to pool parties
bonwick
parents:
1775
diff
changeset
|
1797 |
metaslab_free(spa, bp, txg, B_FALSE); |
789 | 1798 |
|
1544 | 1799 |
spa_config_exit(spa, FTAG); |
789 | 1800 |
} |