Commit | Line | Data |
---|---|---|
155e7524 FI |
1 | /* |
2 | * linux/fs/nfs/blocklayout/blocklayout.c | |
3 | * | |
4 | * Module for the NFSv4.1 pNFS block layout driver. | |
5 | * | |
6 | * Copyright (c) 2006 The Regents of the University of Michigan. | |
7 | * All rights reserved. | |
8 | * | |
9 | * Andy Adamson <andros@citi.umich.edu> | |
10 | * Fred Isaman <iisaman@umich.edu> | |
11 | * | |
12 | * permission is granted to use, copy, create derivative works and | |
13 | * redistribute this software and such derivative works for any purpose, | |
14 | * so long as the name of the university of michigan is not used in | |
15 | * any advertising or publicity pertaining to the use or distribution | |
16 | * of this software without specific, written prior authorization. if | |
17 | * the above copyright notice or any other identification of the | |
18 | * university of michigan is included in any copy of any portion of | |
19 | * this software, then the disclaimer below must also be included. | |
20 | * | |
21 | * this software is provided as is, without representation from the | |
22 | * university of michigan as to its fitness for any purpose, and without | |
23 | * warranty by the university of michigan of any kind, either express | |
24 | * or implied, including without limitation the implied warranties of | |
25 | * merchantability and fitness for a particular purpose. the regents | |
26 | * of the university of michigan shall not be liable for any damages, | |
27 | * including special, indirect, incidental, or consequential damages, | |
28 | * with respect to any claim arising out or in connection with the use | |
29 | * of the software, even if it has been or is hereafter advised of the | |
30 | * possibility of such damages. | |
31 | */ | |
9549ec01 | 32 | |
155e7524 FI |
33 | #include <linux/module.h> |
34 | #include <linux/init.h> | |
fe0a9b74 JR |
35 | #include <linux/mount.h> |
36 | #include <linux/namei.h> | |
9549ec01 | 37 | #include <linux/bio.h> /* struct bio */ |
88c9e421 | 38 | #include <linux/prefetch.h> |
6296556f | 39 | #include <linux/pagevec.h> |
155e7524 | 40 | |
10bd295a | 41 | #include "../pnfs.h" |
76e697ba | 42 | #include "../nfs4session.h" |
10bd295a | 43 | #include "../internal.h" |
155e7524 FI |
44 | #include "blocklayout.h" |
45 | ||
46 | #define NFSDBG_FACILITY NFSDBG_PNFS_LD | |
47 | ||
48 | MODULE_LICENSE("GPL"); | |
49 | MODULE_AUTHOR("Andy Adamson <andros@citi.umich.edu>"); | |
50 | MODULE_DESCRIPTION("The NFSv4.1 pNFS Block layout driver"); | |
51 | ||
8067253c | 52 | static bool is_hole(struct pnfs_block_extent *be) |
9549ec01 | 53 | { |
8067253c CH |
54 | switch (be->be_state) { |
55 | case PNFS_BLOCK_NONE_DATA: | |
56 | return true; | |
57 | case PNFS_BLOCK_INVALID_DATA: | |
58 | return be->be_tag ? false : true; | |
59 | default: | |
60 | return false; | |
61 | } | |
650e2d39 FI |
62 | } |
63 | ||
9549ec01 FI |
64 | /* The data we are handed might be spread across several bios. We need |
65 | * to track when the last one is finished. | |
66 | */ | |
67 | struct parallel_io { | |
68 | struct kref refcnt; | |
8067253c | 69 | void (*pnfs_callback) (void *data); |
9549ec01 FI |
70 | void *data; |
71 | }; | |
72 | ||
73 | static inline struct parallel_io *alloc_parallel(void *data) | |
74 | { | |
75 | struct parallel_io *rv; | |
76 | ||
77 | rv = kmalloc(sizeof(*rv), GFP_NOFS); | |
78 | if (rv) { | |
79 | rv->data = data; | |
80 | kref_init(&rv->refcnt); | |
81 | } | |
82 | return rv; | |
83 | } | |
84 | ||
85 | static inline void get_parallel(struct parallel_io *p) | |
86 | { | |
87 | kref_get(&p->refcnt); | |
88 | } | |
89 | ||
90 | static void destroy_parallel(struct kref *kref) | |
91 | { | |
92 | struct parallel_io *p = container_of(kref, struct parallel_io, refcnt); | |
93 | ||
94 | dprintk("%s enter\n", __func__); | |
8067253c | 95 | p->pnfs_callback(p->data); |
9549ec01 FI |
96 | kfree(p); |
97 | } | |
98 | ||
99 | static inline void put_parallel(struct parallel_io *p) | |
100 | { | |
101 | kref_put(&p->refcnt, destroy_parallel); | |
102 | } | |
103 | ||
104 | static struct bio * | |
4e49ea4a | 105 | bl_submit_bio(struct bio *bio) |
9549ec01 FI |
106 | { |
107 | if (bio) { | |
108 | get_parallel(bio->bi_private); | |
109 | dprintk("%s submitting %s bio %u@%llu\n", __func__, | |
95fe6c1a | 110 | bio_op(bio) == READ ? "read" : "write", |
4e49ea4a | 111 | bio->bi_iter.bi_size, |
4f024f37 | 112 | (unsigned long long)bio->bi_iter.bi_sector); |
4e49ea4a | 113 | submit_bio(bio); |
9549ec01 FI |
114 | } |
115 | return NULL; | |
116 | } | |
117 | ||
5c83746a CH |
118 | static struct bio * |
119 | bl_alloc_init_bio(int npg, struct block_device *bdev, sector_t disk_sector, | |
4246a0b6 | 120 | bio_end_io_t end_io, struct parallel_io *par) |
9549ec01 FI |
121 | { |
122 | struct bio *bio; | |
123 | ||
74a6eeb4 | 124 | npg = min(npg, BIO_MAX_PAGES); |
9549ec01 | 125 | bio = bio_alloc(GFP_NOIO, npg); |
74a6eeb4 PT |
126 | if (!bio && (current->flags & PF_MEMALLOC)) { |
127 | while (!bio && (npg /= 2)) | |
128 | bio = bio_alloc(GFP_NOIO, npg); | |
129 | } | |
9549ec01 | 130 | |
74a6eeb4 | 131 | if (bio) { |
5c83746a | 132 | bio->bi_iter.bi_sector = disk_sector; |
74d46992 | 133 | bio_set_dev(bio, bdev); |
74a6eeb4 PT |
134 | bio->bi_end_io = end_io; |
135 | bio->bi_private = par; | |
136 | } | |
9549ec01 FI |
137 | return bio; |
138 | } | |
139 | ||
f34462c3 BC |
140 | static bool offset_in_map(u64 offset, struct pnfs_block_dev_map *map) |
141 | { | |
142 | return offset >= map->start && offset < map->start + map->len; | |
143 | } | |
144 | ||
5c83746a CH |
145 | static struct bio * |
146 | do_add_page_to_bio(struct bio *bio, int npg, int rw, sector_t isect, | |
147 | struct page *page, struct pnfs_block_dev_map *map, | |
4246a0b6 | 148 | struct pnfs_block_extent *be, bio_end_io_t end_io, |
5c83746a | 149 | struct parallel_io *par, unsigned int offset, int *len) |
9549ec01 | 150 | { |
5c83746a CH |
151 | struct pnfs_block_dev *dev = |
152 | container_of(be->be_device, struct pnfs_block_dev, node); | |
153 | u64 disk_addr, end; | |
154 | ||
fe6e1e8d | 155 | dprintk("%s: npg %d rw %d isect %llu offset %u len %d\n", __func__, |
5c83746a CH |
156 | npg, rw, (unsigned long long)isect, offset, *len); |
157 | ||
158 | /* translate to device offset */ | |
159 | isect += be->be_v_offset; | |
160 | isect -= be->be_f_offset; | |
161 | ||
162 | /* translate to physical disk offset */ | |
163 | disk_addr = (u64)isect << SECTOR_SHIFT; | |
f34462c3 BC |
164 | if (!offset_in_map(disk_addr, map)) { |
165 | if (!dev->map(dev, disk_addr, map) || !offset_in_map(disk_addr, map)) | |
5c83746a | 166 | return ERR_PTR(-EIO); |
4e49ea4a | 167 | bio = bl_submit_bio(bio); |
5c83746a CH |
168 | } |
169 | disk_addr += map->disk_offset; | |
170 | disk_addr -= map->start; | |
171 | ||
172 | /* limit length to what the device mapping allows */ | |
173 | end = disk_addr + *len; | |
174 | if (end >= map->start + map->len) | |
175 | *len = map->start + map->len - disk_addr; | |
176 | ||
9549ec01 FI |
177 | retry: |
178 | if (!bio) { | |
5c83746a CH |
179 | bio = bl_alloc_init_bio(npg, map->bdev, |
180 | disk_addr >> SECTOR_SHIFT, end_io, par); | |
9549ec01 FI |
181 | if (!bio) |
182 | return ERR_PTR(-ENOMEM); | |
95fe6c1a | 183 | bio_set_op_attrs(bio, rw, 0); |
9549ec01 | 184 | } |
5c83746a | 185 | if (bio_add_page(bio, page, *len, offset) < *len) { |
4e49ea4a | 186 | bio = bl_submit_bio(bio); |
9549ec01 FI |
187 | goto retry; |
188 | } | |
189 | return bio; | |
190 | } | |
191 | ||
b3dce6a2 BC |
192 | static void bl_mark_devices_unavailable(struct nfs_pgio_header *header, bool rw) |
193 | { | |
194 | struct pnfs_block_layout *bl = BLK_LSEG2EXT(header->lseg); | |
195 | size_t bytes_left = header->args.count; | |
196 | sector_t isect, extent_length = 0; | |
197 | struct pnfs_block_extent be; | |
198 | ||
199 | isect = header->args.offset >> SECTOR_SHIFT; | |
200 | bytes_left += header->args.offset - (isect << SECTOR_SHIFT); | |
201 | ||
202 | while (bytes_left > 0) { | |
203 | if (!ext_tree_lookup(bl, isect, &be, rw)) | |
204 | return; | |
205 | extent_length = be.be_length - (isect - be.be_f_offset); | |
206 | nfs4_mark_deviceid_unavailable(be.be_device); | |
207 | isect += extent_length; | |
208 | if (bytes_left > extent_length << SECTOR_SHIFT) | |
209 | bytes_left -= extent_length << SECTOR_SHIFT; | |
210 | else | |
211 | bytes_left = 0; | |
212 | } | |
213 | } | |
214 | ||
4246a0b6 | 215 | static void bl_end_io_read(struct bio *bio) |
9549ec01 FI |
216 | { |
217 | struct parallel_io *par = bio->bi_private; | |
9549ec01 | 218 | |
4e4cbee9 | 219 | if (bio->bi_status) { |
d45f60c6 | 220 | struct nfs_pgio_header *header = par->data; |
cd841605 FI |
221 | |
222 | if (!header->pnfs_error) | |
223 | header->pnfs_error = -EIO; | |
224 | pnfs_set_lo_fail(header->lseg); | |
b3dce6a2 | 225 | bl_mark_devices_unavailable(header, false); |
9549ec01 | 226 | } |
8c792ea9 | 227 | |
9549ec01 FI |
228 | bio_put(bio); |
229 | put_parallel(par); | |
230 | } | |
231 | ||
232 | static void bl_read_cleanup(struct work_struct *work) | |
233 | { | |
234 | struct rpc_task *task; | |
d45f60c6 | 235 | struct nfs_pgio_header *hdr; |
9549ec01 FI |
236 | dprintk("%s enter\n", __func__); |
237 | task = container_of(work, struct rpc_task, u.tk_work); | |
d45f60c6 WAA |
238 | hdr = container_of(task, struct nfs_pgio_header, task); |
239 | pnfs_ld_read_done(hdr); | |
9549ec01 FI |
240 | } |
241 | ||
242 | static void | |
8067253c | 243 | bl_end_par_io_read(void *data) |
9549ec01 | 244 | { |
d45f60c6 | 245 | struct nfs_pgio_header *hdr = data; |
9549ec01 | 246 | |
d45f60c6 WAA |
247 | hdr->task.tk_status = hdr->pnfs_error; |
248 | INIT_WORK(&hdr->task.u.tk_work, bl_read_cleanup); | |
249 | schedule_work(&hdr->task.u.tk_work); | |
9549ec01 FI |
250 | } |
251 | ||
155e7524 | 252 | static enum pnfs_try_status |
8067253c | 253 | bl_read_pagelist(struct nfs_pgio_header *header) |
155e7524 | 254 | { |
8067253c | 255 | struct pnfs_block_layout *bl = BLK_LSEG2EXT(header->lseg); |
5c83746a | 256 | struct pnfs_block_dev_map map = { .start = NFS4_MAX_UINT64 }; |
9549ec01 | 257 | struct bio *bio = NULL; |
8067253c | 258 | struct pnfs_block_extent be; |
9549ec01 FI |
259 | sector_t isect, extent_length = 0; |
260 | struct parallel_io *par; | |
8067253c CH |
261 | loff_t f_offset = header->args.offset; |
262 | size_t bytes_left = header->args.count; | |
15ae2c7b | 263 | unsigned int pg_offset = header->args.pgbase, pg_len; |
8067253c | 264 | struct page **pages = header->args.pages; |
09cbfeaf | 265 | int pg_index = header->args.pgbase >> PAGE_SHIFT; |
f742dc4a | 266 | const bool is_dio = (header->dreq != NULL); |
be98fd0a | 267 | struct blk_plug plug; |
8067253c | 268 | int i; |
9549ec01 | 269 | |
6f00866d | 270 | dprintk("%s enter nr_pages %u offset %lld count %u\n", __func__, |
8067253c CH |
271 | header->page_array.npages, f_offset, |
272 | (unsigned int)header->args.count); | |
9549ec01 | 273 | |
8067253c | 274 | par = alloc_parallel(header); |
9549ec01 | 275 | if (!par) |
8067253c | 276 | return PNFS_NOT_ATTEMPTED; |
9549ec01 | 277 | par->pnfs_callback = bl_end_par_io_read; |
9549ec01 | 278 | |
be98fd0a CH |
279 | blk_start_plug(&plug); |
280 | ||
9549ec01 FI |
281 | isect = (sector_t) (f_offset >> SECTOR_SHIFT); |
282 | /* Code assumes extents are page-aligned */ | |
8067253c | 283 | for (i = pg_index; i < header->page_array.npages; i++) { |
921b81a8 | 284 | if (extent_length <= 0) { |
9549ec01 | 285 | /* We've used up the previous extent */ |
4e49ea4a | 286 | bio = bl_submit_bio(bio); |
8067253c | 287 | |
9549ec01 | 288 | /* Get the next one */ |
8067253c | 289 | if (!ext_tree_lookup(bl, isect, &be, false)) { |
cd841605 | 290 | header->pnfs_error = -EIO; |
9549ec01 FI |
291 | goto out; |
292 | } | |
8067253c | 293 | extent_length = be.be_length - (isect - be.be_f_offset); |
9549ec01 | 294 | } |
f742dc4a PT |
295 | |
296 | if (is_dio) { | |
09cbfeaf KS |
297 | if (pg_offset + bytes_left > PAGE_SIZE) |
298 | pg_len = PAGE_SIZE - pg_offset; | |
f742dc4a PT |
299 | else |
300 | pg_len = bytes_left; | |
f742dc4a | 301 | } else { |
3a6fd1f0 | 302 | BUG_ON(pg_offset != 0); |
09cbfeaf | 303 | pg_len = PAGE_SIZE; |
f742dc4a PT |
304 | } |
305 | ||
8067253c | 306 | if (is_hole(&be)) { |
4e49ea4a | 307 | bio = bl_submit_bio(bio); |
9549ec01 FI |
308 | /* Fill hole w/ zeroes w/o accessing device */ |
309 | dprintk("%s Zeroing page for hole\n", __func__); | |
f742dc4a | 310 | zero_user_segment(pages[i], pg_offset, pg_len); |
5c83746a CH |
311 | |
312 | /* invalidate map */ | |
313 | map.start = NFS4_MAX_UINT64; | |
9549ec01 | 314 | } else { |
823b0c9d | 315 | bio = do_add_page_to_bio(bio, |
8067253c | 316 | header->page_array.npages - i, |
30dd374f | 317 | READ, |
5c83746a | 318 | isect, pages[i], &map, &be, |
f742dc4a | 319 | bl_end_io_read, par, |
5c83746a | 320 | pg_offset, &pg_len); |
9549ec01 | 321 | if (IS_ERR(bio)) { |
cd841605 | 322 | header->pnfs_error = PTR_ERR(bio); |
e6d05a75 | 323 | bio = NULL; |
9549ec01 FI |
324 | goto out; |
325 | } | |
326 | } | |
f742dc4a | 327 | isect += (pg_len >> SECTOR_SHIFT); |
921b81a8 | 328 | extent_length -= (pg_len >> SECTOR_SHIFT); |
5c83746a CH |
329 | f_offset += pg_len; |
330 | bytes_left -= pg_len; | |
15ae2c7b | 331 | pg_offset = 0; |
9549ec01 | 332 | } |
cd841605 | 333 | if ((isect << SECTOR_SHIFT) >= header->inode->i_size) { |
8067253c CH |
334 | header->res.eof = 1; |
335 | header->res.count = header->inode->i_size - header->args.offset; | |
9549ec01 | 336 | } else { |
8067253c | 337 | header->res.count = (isect << SECTOR_SHIFT) - header->args.offset; |
9549ec01 FI |
338 | } |
339 | out: | |
4e49ea4a | 340 | bl_submit_bio(bio); |
be98fd0a | 341 | blk_finish_plug(&plug); |
9549ec01 FI |
342 | put_parallel(par); |
343 | return PNFS_ATTEMPTED; | |
31e6306a FI |
344 | } |
345 | ||
4246a0b6 | 346 | static void bl_end_io_write(struct bio *bio) |
650e2d39 FI |
347 | { |
348 | struct parallel_io *par = bio->bi_private; | |
d45f60c6 | 349 | struct nfs_pgio_header *header = par->data; |
650e2d39 | 350 | |
4e4cbee9 | 351 | if (bio->bi_status) { |
cd841605 FI |
352 | if (!header->pnfs_error) |
353 | header->pnfs_error = -EIO; | |
354 | pnfs_set_lo_fail(header->lseg); | |
b3dce6a2 | 355 | bl_mark_devices_unavailable(header, true); |
650e2d39 FI |
356 | } |
357 | bio_put(bio); | |
358 | put_parallel(par); | |
359 | } | |
360 | ||
361 | /* Function scheduled for call during bl_end_par_io_write, | |
362 | * it marks sectors as written and extends the commitlist. | |
363 | */ | |
364 | static void bl_write_cleanup(struct work_struct *work) | |
365 | { | |
8067253c CH |
366 | struct rpc_task *task = container_of(work, struct rpc_task, u.tk_work); |
367 | struct nfs_pgio_header *hdr = | |
368 | container_of(task, struct nfs_pgio_header, task); | |
369 | ||
650e2d39 | 370 | dprintk("%s enter\n", __func__); |
8067253c | 371 | |
d45f60c6 | 372 | if (likely(!hdr->pnfs_error)) { |
8067253c | 373 | struct pnfs_block_layout *bl = BLK_LSEG2EXT(hdr->lseg); |
09cbfeaf | 374 | u64 start = hdr->args.offset & (loff_t)PAGE_MASK; |
8067253c | 375 | u64 end = (hdr->args.offset + hdr->args.count + |
09cbfeaf | 376 | PAGE_SIZE - 1) & (loff_t)PAGE_MASK; |
a3f9d1b5 | 377 | u64 lwb = hdr->args.offset + hdr->args.count; |
8067253c CH |
378 | |
379 | ext_tree_mark_written(bl, start >> SECTOR_SHIFT, | |
a3f9d1b5 | 380 | (end - start) >> SECTOR_SHIFT, lwb); |
31e6306a | 381 | } |
8067253c | 382 | |
d45f60c6 | 383 | pnfs_ld_write_done(hdr); |
650e2d39 FI |
384 | } |
385 | ||
386 | /* Called when last of bios associated with a bl_write_pagelist call finishes */ | |
8067253c | 387 | static void bl_end_par_io_write(void *data) |
650e2d39 | 388 | { |
d45f60c6 | 389 | struct nfs_pgio_header *hdr = data; |
650e2d39 | 390 | |
d45f60c6 | 391 | hdr->task.tk_status = hdr->pnfs_error; |
c65e6254 | 392 | hdr->verf.committed = NFS_FILE_SYNC; |
d45f60c6 WAA |
393 | INIT_WORK(&hdr->task.u.tk_work, bl_write_cleanup); |
394 | schedule_work(&hdr->task.u.tk_work); | |
650e2d39 FI |
395 | } |
396 | ||
155e7524 | 397 | static enum pnfs_try_status |
d45f60c6 | 398 | bl_write_pagelist(struct nfs_pgio_header *header, int sync) |
155e7524 | 399 | { |
8067253c | 400 | struct pnfs_block_layout *bl = BLK_LSEG2EXT(header->lseg); |
5c83746a | 401 | struct pnfs_block_dev_map map = { .start = NFS4_MAX_UINT64 }; |
650e2d39 | 402 | struct bio *bio = NULL; |
8067253c | 403 | struct pnfs_block_extent be; |
3a6fd1f0 | 404 | sector_t isect, extent_length = 0; |
96c9eae6 | 405 | struct parallel_io *par = NULL; |
d45f60c6 WAA |
406 | loff_t offset = header->args.offset; |
407 | size_t count = header->args.count; | |
d45f60c6 | 408 | struct page **pages = header->args.pages; |
09cbfeaf | 409 | int pg_index = header->args.pgbase >> PAGE_SHIFT; |
5c83746a | 410 | unsigned int pg_len; |
be98fd0a | 411 | struct blk_plug plug; |
8067253c | 412 | int i; |
650e2d39 | 413 | |
5b5e0928 | 414 | dprintk("%s enter, %zu@%lld\n", __func__, count, offset); |
96c9eae6 | 415 | |
d45f60c6 | 416 | /* At this point, header->page_aray is a (sequential) list of nfs_pages. |
71cdd40f PT |
417 | * We want to write each, and if there is an error set pnfs_error |
418 | * to have it redone using nfs. | |
650e2d39 | 419 | */ |
d45f60c6 | 420 | par = alloc_parallel(header); |
650e2d39 | 421 | if (!par) |
8067253c | 422 | return PNFS_NOT_ATTEMPTED; |
650e2d39 | 423 | par->pnfs_callback = bl_end_par_io_write; |
650e2d39 | 424 | |
3a6fd1f0 | 425 | blk_start_plug(&plug); |
71cdd40f | 426 | |
3a6fd1f0 | 427 | /* we always write out the whole page */ |
09cbfeaf | 428 | offset = offset & (loff_t)PAGE_MASK; |
3a6fd1f0 | 429 | isect = offset >> SECTOR_SHIFT; |
71cdd40f | 430 | |
d45f60c6 | 431 | for (i = pg_index; i < header->page_array.npages; i++) { |
921b81a8 | 432 | if (extent_length <= 0) { |
650e2d39 | 433 | /* We've used up the previous extent */ |
4e49ea4a | 434 | bio = bl_submit_bio(bio); |
650e2d39 | 435 | /* Get the next one */ |
8067253c | 436 | if (!ext_tree_lookup(bl, isect, &be, true)) { |
cd841605 | 437 | header->pnfs_error = -EINVAL; |
650e2d39 FI |
438 | goto out; |
439 | } | |
fe6e1e8d | 440 | |
8067253c | 441 | extent_length = be.be_length - (isect - be.be_f_offset); |
71cdd40f | 442 | } |
fe6e1e8d | 443 | |
09cbfeaf | 444 | pg_len = PAGE_SIZE; |
d45f60c6 | 445 | bio = do_add_page_to_bio(bio, header->page_array.npages - i, |
5c83746a | 446 | WRITE, isect, pages[i], &map, &be, |
fe6e1e8d | 447 | bl_end_io_write, par, |
5c83746a | 448 | 0, &pg_len); |
71cdd40f | 449 | if (IS_ERR(bio)) { |
cd841605 | 450 | header->pnfs_error = PTR_ERR(bio); |
e6d05a75 | 451 | bio = NULL; |
71cdd40f | 452 | goto out; |
650e2d39 | 453 | } |
5c83746a CH |
454 | |
455 | offset += pg_len; | |
456 | count -= pg_len; | |
457 | isect += (pg_len >> SECTOR_SHIFT); | |
458 | extent_length -= (pg_len >> SECTOR_SHIFT); | |
650e2d39 | 459 | } |
71cdd40f | 460 | |
d45f60c6 | 461 | header->res.count = header->args.count; |
650e2d39 | 462 | out: |
4e49ea4a | 463 | bl_submit_bio(bio); |
be98fd0a | 464 | blk_finish_plug(&plug); |
650e2d39 FI |
465 | put_parallel(par); |
466 | return PNFS_ATTEMPTED; | |
155e7524 FI |
467 | } |
468 | ||
469 | static void bl_free_layout_hdr(struct pnfs_layout_hdr *lo) | |
470 | { | |
471 | struct pnfs_block_layout *bl = BLK_LO2EXT(lo); | |
8067253c | 472 | int err; |
155e7524 FI |
473 | |
474 | dprintk("%s enter\n", __func__); | |
8067253c CH |
475 | |
476 | err = ext_tree_remove(bl, true, 0, LLONG_MAX); | |
477 | WARN_ON(err); | |
478 | ||
155e7524 FI |
479 | kfree(bl); |
480 | } | |
481 | ||
d9186c03 CH |
482 | static struct pnfs_layout_hdr *__bl_alloc_layout_hdr(struct inode *inode, |
483 | gfp_t gfp_flags, bool is_scsi_layout) | |
155e7524 FI |
484 | { |
485 | struct pnfs_block_layout *bl; | |
486 | ||
487 | dprintk("%s enter\n", __func__); | |
488 | bl = kzalloc(sizeof(*bl), gfp_flags); | |
489 | if (!bl) | |
490 | return NULL; | |
8067253c CH |
491 | |
492 | bl->bl_ext_rw = RB_ROOT; | |
493 | bl->bl_ext_ro = RB_ROOT; | |
155e7524 | 494 | spin_lock_init(&bl->bl_ext_lock); |
8067253c | 495 | |
d9186c03 | 496 | bl->bl_scsi_layout = is_scsi_layout; |
155e7524 FI |
497 | return &bl->bl_layout; |
498 | } | |
499 | ||
d9186c03 CH |
500 | static struct pnfs_layout_hdr *bl_alloc_layout_hdr(struct inode *inode, |
501 | gfp_t gfp_flags) | |
502 | { | |
503 | return __bl_alloc_layout_hdr(inode, gfp_flags, false); | |
504 | } | |
505 | ||
506 | static struct pnfs_layout_hdr *sl_alloc_layout_hdr(struct inode *inode, | |
507 | gfp_t gfp_flags) | |
508 | { | |
509 | return __bl_alloc_layout_hdr(inode, gfp_flags, true); | |
510 | } | |
511 | ||
a60d2ebd | 512 | static void bl_free_lseg(struct pnfs_layout_segment *lseg) |
155e7524 | 513 | { |
a60d2ebd FI |
514 | dprintk("%s enter\n", __func__); |
515 | kfree(lseg); | |
155e7524 FI |
516 | } |
517 | ||
9cc47541 CH |
518 | /* Tracks info needed to ensure extents in layout obey constraints of spec */ |
519 | struct layout_verification { | |
520 | u32 mode; /* R or RW */ | |
521 | u64 start; /* Expected start of next non-COW extent */ | |
522 | u64 inval; /* Start of INVAL coverage */ | |
523 | u64 cowread; /* End of COW read coverage */ | |
524 | }; | |
525 | ||
526 | /* Verify the extent meets the layout requirements of the pnfs-block draft, | |
527 | * section 2.3.1. | |
528 | */ | |
529 | static int verify_extent(struct pnfs_block_extent *be, | |
530 | struct layout_verification *lv) | |
531 | { | |
532 | if (lv->mode == IOMODE_READ) { | |
533 | if (be->be_state == PNFS_BLOCK_READWRITE_DATA || | |
534 | be->be_state == PNFS_BLOCK_INVALID_DATA) | |
535 | return -EIO; | |
536 | if (be->be_f_offset != lv->start) | |
537 | return -EIO; | |
538 | lv->start += be->be_length; | |
539 | return 0; | |
540 | } | |
541 | /* lv->mode == IOMODE_RW */ | |
542 | if (be->be_state == PNFS_BLOCK_READWRITE_DATA) { | |
543 | if (be->be_f_offset != lv->start) | |
544 | return -EIO; | |
545 | if (lv->cowread > lv->start) | |
546 | return -EIO; | |
547 | lv->start += be->be_length; | |
548 | lv->inval = lv->start; | |
549 | return 0; | |
550 | } else if (be->be_state == PNFS_BLOCK_INVALID_DATA) { | |
551 | if (be->be_f_offset != lv->start) | |
552 | return -EIO; | |
553 | lv->start += be->be_length; | |
554 | return 0; | |
555 | } else if (be->be_state == PNFS_BLOCK_READ_DATA) { | |
556 | if (be->be_f_offset > lv->start) | |
557 | return -EIO; | |
558 | if (be->be_f_offset < lv->inval) | |
559 | return -EIO; | |
560 | if (be->be_f_offset < lv->cowread) | |
561 | return -EIO; | |
562 | /* It looks like you might want to min this with lv->start, | |
563 | * but you really don't. | |
564 | */ | |
565 | lv->inval = lv->inval + be->be_length; | |
566 | lv->cowread = be->be_f_offset + be->be_length; | |
567 | return 0; | |
568 | } else | |
569 | return -EIO; | |
570 | } | |
571 | ||
572 | static int decode_sector_number(__be32 **rp, sector_t *sp) | |
573 | { | |
574 | uint64_t s; | |
575 | ||
576 | *rp = xdr_decode_hyper(*rp, &s); | |
577 | if (s & 0x1ff) { | |
578 | printk(KERN_WARNING "NFS: %s: sector not aligned\n", __func__); | |
579 | return -1; | |
580 | } | |
581 | *sp = s >> SECTOR_SHIFT; | |
582 | return 0; | |
583 | } | |
584 | ||
b3dce6a2 BC |
585 | static struct nfs4_deviceid_node * |
586 | bl_find_get_deviceid(struct nfs_server *server, | |
a52458b4 | 587 | const struct nfs4_deviceid *id, const struct cred *cred, |
b3dce6a2 BC |
588 | gfp_t gfp_mask) |
589 | { | |
590 | struct nfs4_deviceid_node *node; | |
591 | unsigned long start, end; | |
592 | ||
593 | retry: | |
594 | node = nfs4_find_get_deviceid(server, id, cred, gfp_mask); | |
595 | if (!node) | |
596 | return ERR_PTR(-ENODEV); | |
597 | ||
598 | if (test_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags) == 0) | |
599 | return node; | |
600 | ||
601 | end = jiffies; | |
602 | start = end - PNFS_DEVICE_RETRY_TIMEOUT; | |
603 | if (!time_in_range(node->timestamp_unavailable, start, end)) { | |
604 | nfs4_delete_deviceid(node->ld, node->nfs_client, id); | |
605 | goto retry; | |
606 | } | |
607 | return ERR_PTR(-ENODEV); | |
608 | } | |
609 | ||
9cc47541 | 610 | static int |
ca0fe1df CH |
611 | bl_alloc_extent(struct xdr_stream *xdr, struct pnfs_layout_hdr *lo, |
612 | struct layout_verification *lv, struct list_head *extents, | |
613 | gfp_t gfp_mask) | |
9cc47541 | 614 | { |
ca0fe1df CH |
615 | struct pnfs_block_extent *be; |
616 | struct nfs4_deviceid id; | |
617 | int error; | |
9cc47541 | 618 | __be32 *p; |
ca0fe1df CH |
619 | |
620 | p = xdr_inline_decode(xdr, 28 + NFS4_DEVICEID4_SIZE); | |
621 | if (!p) | |
622 | return -EIO; | |
623 | ||
624 | be = kzalloc(sizeof(*be), GFP_NOFS); | |
625 | if (!be) | |
626 | return -ENOMEM; | |
627 | ||
628 | memcpy(&id, p, NFS4_DEVICEID4_SIZE); | |
629 | p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE); | |
630 | ||
b3dce6a2 | 631 | be->be_device = bl_find_get_deviceid(NFS_SERVER(lo->plh_inode), &id, |
ca0fe1df | 632 | lo->plh_lc_cred, gfp_mask); |
b3dce6a2 BC |
633 | if (IS_ERR(be->be_device)) { |
634 | error = PTR_ERR(be->be_device); | |
ca0fe1df | 635 | goto out_free_be; |
b3dce6a2 | 636 | } |
ca0fe1df CH |
637 | |
638 | /* | |
639 | * The next three values are read in as bytes, but stored in the | |
640 | * extent structure in 512-byte granularity. | |
641 | */ | |
b3dce6a2 | 642 | error = -EIO; |
ca0fe1df CH |
643 | if (decode_sector_number(&p, &be->be_f_offset) < 0) |
644 | goto out_put_deviceid; | |
645 | if (decode_sector_number(&p, &be->be_length) < 0) | |
646 | goto out_put_deviceid; | |
647 | if (decode_sector_number(&p, &be->be_v_offset) < 0) | |
648 | goto out_put_deviceid; | |
649 | be->be_state = be32_to_cpup(p++); | |
650 | ||
651 | error = verify_extent(be, lv); | |
652 | if (error) { | |
653 | dprintk("%s: extent verification failed\n", __func__); | |
654 | goto out_put_deviceid; | |
655 | } | |
656 | ||
657 | list_add_tail(&be->be_list, extents); | |
658 | return 0; | |
659 | ||
660 | out_put_deviceid: | |
661 | nfs4_put_deviceid_node(be->be_device); | |
662 | out_free_be: | |
663 | kfree(be); | |
664 | return error; | |
665 | } | |
666 | ||
667 | static struct pnfs_layout_segment * | |
668 | bl_alloc_lseg(struct pnfs_layout_hdr *lo, struct nfs4_layoutget_res *lgr, | |
669 | gfp_t gfp_mask) | |
670 | { | |
9cc47541 CH |
671 | struct layout_verification lv = { |
672 | .mode = lgr->range.iomode, | |
673 | .start = lgr->range.offset >> SECTOR_SHIFT, | |
674 | .inval = lgr->range.offset >> SECTOR_SHIFT, | |
675 | .cowread = lgr->range.offset >> SECTOR_SHIFT, | |
676 | }; | |
ca0fe1df CH |
677 | struct pnfs_block_layout *bl = BLK_LO2EXT(lo); |
678 | struct pnfs_layout_segment *lseg; | |
679 | struct xdr_buf buf; | |
680 | struct xdr_stream xdr; | |
681 | struct page *scratch; | |
682 | int status, i; | |
683 | uint32_t count; | |
684 | __be32 *p; | |
9cc47541 CH |
685 | LIST_HEAD(extents); |
686 | ||
687 | dprintk("---> %s\n", __func__); | |
688 | ||
ca0fe1df CH |
689 | lseg = kzalloc(sizeof(*lseg), gfp_mask); |
690 | if (!lseg) | |
691 | return ERR_PTR(-ENOMEM); | |
692 | ||
693 | status = -ENOMEM; | |
694 | scratch = alloc_page(gfp_mask); | |
9cc47541 | 695 | if (!scratch) |
ca0fe1df | 696 | goto out; |
9cc47541 | 697 | |
ca0fe1df CH |
698 | xdr_init_decode_pages(&xdr, &buf, |
699 | lgr->layoutp->pages, lgr->layoutp->len); | |
700 | xdr_set_scratch_buffer(&xdr, page_address(scratch), PAGE_SIZE); | |
9cc47541 | 701 | |
ca0fe1df CH |
702 | status = -EIO; |
703 | p = xdr_inline_decode(&xdr, 4); | |
9cc47541 | 704 | if (unlikely(!p)) |
ca0fe1df | 705 | goto out_free_scratch; |
9cc47541 CH |
706 | |
707 | count = be32_to_cpup(p++); | |
ca0fe1df | 708 | dprintk("%s: number of extents %d\n", __func__, count); |
9cc47541 | 709 | |
ca0fe1df CH |
710 | /* |
711 | * Decode individual extents, putting them in temporary staging area | |
712 | * until whole layout is decoded to make error recovery easier. | |
9cc47541 CH |
713 | */ |
714 | for (i = 0; i < count; i++) { | |
ca0fe1df CH |
715 | status = bl_alloc_extent(&xdr, lo, &lv, &extents, gfp_mask); |
716 | if (status) | |
717 | goto process_extents; | |
9cc47541 | 718 | } |
ca0fe1df | 719 | |
9cc47541 CH |
720 | if (lgr->range.offset + lgr->range.length != |
721 | lv.start << SECTOR_SHIFT) { | |
722 | dprintk("%s Final length mismatch\n", __func__); | |
ca0fe1df CH |
723 | status = -EIO; |
724 | goto process_extents; | |
9cc47541 | 725 | } |
ca0fe1df | 726 | |
9cc47541 CH |
727 | if (lv.start < lv.cowread) { |
728 | dprintk("%s Final uncovered COW extent\n", __func__); | |
ca0fe1df | 729 | status = -EIO; |
9cc47541 | 730 | } |
9cc47541 | 731 | |
ca0fe1df | 732 | process_extents: |
9cc47541 | 733 | while (!list_empty(&extents)) { |
ca0fe1df CH |
734 | struct pnfs_block_extent *be = |
735 | list_first_entry(&extents, struct pnfs_block_extent, | |
736 | be_list); | |
9cc47541 | 737 | list_del(&be->be_list); |
9cc47541 | 738 | |
ca0fe1df CH |
739 | if (!status) |
740 | status = ext_tree_insert(bl, be); | |
a60d2ebd | 741 | |
ca0fe1df CH |
742 | if (status) { |
743 | nfs4_put_deviceid_node(be->be_device); | |
744 | kfree(be); | |
745 | } | |
746 | } | |
747 | ||
748 | out_free_scratch: | |
749 | __free_page(scratch); | |
750 | out: | |
751 | dprintk("%s returns %d\n", __func__, status); | |
b3dce6a2 BC |
752 | switch (status) { |
753 | case -ENODEV: | |
754 | /* Our extent block devices are unavailable */ | |
755 | set_bit(NFS_LSEG_UNAVAILABLE, &lseg->pls_flags); | |
01e03bdc | 756 | /* Fall through */ |
b3dce6a2 BC |
757 | case 0: |
758 | return lseg; | |
759 | default: | |
a60d2ebd FI |
760 | kfree(lseg); |
761 | return ERR_PTR(status); | |
762 | } | |
155e7524 FI |
763 | } |
764 | ||
71d5b763 CH |
765 | static void |
766 | bl_return_range(struct pnfs_layout_hdr *lo, | |
767 | struct pnfs_layout_range *range) | |
768 | { | |
769 | struct pnfs_block_layout *bl = BLK_LO2EXT(lo); | |
770 | sector_t offset = range->offset >> SECTOR_SHIFT, end; | |
71d5b763 CH |
771 | |
772 | if (range->offset % 8) { | |
773 | dprintk("%s: offset %lld not block size aligned\n", | |
774 | __func__, range->offset); | |
775 | return; | |
776 | } | |
777 | ||
778 | if (range->length != NFS4_MAX_UINT64) { | |
779 | if (range->length % 8) { | |
780 | dprintk("%s: length %lld not block size aligned\n", | |
781 | __func__, range->length); | |
782 | return; | |
783 | } | |
784 | ||
785 | end = offset + (range->length >> SECTOR_SHIFT); | |
786 | } else { | |
787 | end = round_down(NFS4_MAX_UINT64, PAGE_SIZE); | |
788 | } | |
789 | ||
164ae58c | 790 | ext_tree_remove(bl, range->iomode & IOMODE_RW, offset, end); |
71d5b763 CH |
791 | } |
792 | ||
34dc93c2 CH |
793 | static int |
794 | bl_prepare_layoutcommit(struct nfs4_layoutcommit_args *arg) | |
155e7524 | 795 | { |
34dc93c2 | 796 | return ext_tree_prepare_commit(arg); |
155e7524 FI |
797 | } |
798 | ||
799 | static void | |
800 | bl_cleanup_layoutcommit(struct nfs4_layoutcommit_data *lcdata) | |
801 | { | |
34dc93c2 | 802 | ext_tree_mark_committed(&lcdata->args, lcdata->res.status); |
155e7524 FI |
803 | } |
804 | ||
805 | static int | |
806 | bl_set_layoutdriver(struct nfs_server *server, const struct nfs_fh *fh) | |
807 | { | |
808 | dprintk("%s enter\n", __func__); | |
2f9fd182 FI |
809 | |
810 | if (server->pnfs_blksize == 0) { | |
811 | dprintk("%s Server did not return blksize\n", __func__); | |
812 | return -EINVAL; | |
813 | } | |
e3aaf7f2 CH |
814 | if (server->pnfs_blksize > PAGE_SIZE) { |
815 | printk(KERN_ERR "%s: pNFS blksize %d not supported.\n", | |
816 | __func__, server->pnfs_blksize); | |
817 | return -EINVAL; | |
818 | } | |
819 | ||
d4b18c3e | 820 | return 0; |
155e7524 FI |
821 | } |
822 | ||
f742dc4a | 823 | static bool |
3a6fd1f0 | 824 | is_aligned_req(struct nfs_pageio_descriptor *pgio, |
f35592a9 | 825 | struct nfs_page *req, unsigned int alignment, bool is_write) |
f742dc4a | 826 | { |
3a6fd1f0 CH |
827 | /* |
828 | * Always accept buffered writes, higher layers take care of the | |
829 | * right alignment. | |
830 | */ | |
831 | if (pgio->pg_dreq == NULL) | |
832 | return true; | |
833 | ||
834 | if (!IS_ALIGNED(req->wb_offset, alignment)) | |
835 | return false; | |
836 | ||
837 | if (IS_ALIGNED(req->wb_bytes, alignment)) | |
838 | return true; | |
839 | ||
f35592a9 KM |
840 | if (is_write && |
841 | (req_offset(req) + req->wb_bytes == i_size_read(pgio->pg_inode))) { | |
3a6fd1f0 CH |
842 | /* |
843 | * If the write goes up to the inode size, just write | |
844 | * the full page. Data past the inode size is | |
845 | * guaranteed to be zeroed by the higher level client | |
846 | * code, and this behaviour is mandated by RFC 5663 | |
847 | * section 2.3.2. | |
848 | */ | |
849 | return true; | |
850 | } | |
851 | ||
852 | return false; | |
f742dc4a PT |
853 | } |
854 | ||
855 | static void | |
856 | bl_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) | |
857 | { | |
f35592a9 | 858 | if (!is_aligned_req(pgio, req, SECTOR_SIZE, false)) { |
f742dc4a | 859 | nfs_pageio_reset_read_mds(pgio); |
3a6fd1f0 CH |
860 | return; |
861 | } | |
862 | ||
863 | pnfs_generic_pg_init_read(pgio, req); | |
b3dce6a2 BC |
864 | |
865 | if (pgio->pg_lseg && | |
866 | test_bit(NFS_LSEG_UNAVAILABLE, &pgio->pg_lseg->pls_flags)) { | |
867 | pnfs_error_mark_layout_for_return(pgio->pg_inode, pgio->pg_lseg); | |
868 | pnfs_set_lo_fail(pgio->pg_lseg); | |
869 | nfs_pageio_reset_read_mds(pgio); | |
870 | } | |
f742dc4a PT |
871 | } |
872 | ||
b4fdac1a WAA |
873 | /* |
874 | * Return 0 if @req cannot be coalesced into @pgio, otherwise return the number | |
875 | * of bytes (maximum @req->wb_bytes) that can be coalesced. | |
876 | */ | |
877 | static size_t | |
f742dc4a PT |
878 | bl_pg_test_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, |
879 | struct nfs_page *req) | |
880 | { | |
f35592a9 | 881 | if (!is_aligned_req(pgio, req, SECTOR_SIZE, false)) |
b4fdac1a | 882 | return 0; |
f742dc4a PT |
883 | return pnfs_generic_pg_test(pgio, prev, req); |
884 | } | |
885 | ||
6296556f PT |
886 | /* |
887 | * Return the number of contiguous bytes for a given inode | |
888 | * starting at page frame idx. | |
889 | */ | |
890 | static u64 pnfs_num_cont_bytes(struct inode *inode, pgoff_t idx) | |
891 | { | |
892 | struct address_space *mapping = inode->i_mapping; | |
893 | pgoff_t end; | |
894 | ||
895 | /* Optimize common case that writes from 0 to end of file */ | |
09cbfeaf | 896 | end = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE); |
6a74c0c9 | 897 | if (end != inode->i_mapping->nrpages) { |
6296556f | 898 | rcu_read_lock(); |
0d3f9296 | 899 | end = page_cache_next_miss(mapping, idx + 1, ULONG_MAX); |
6296556f PT |
900 | rcu_read_unlock(); |
901 | } | |
902 | ||
903 | if (!end) | |
09cbfeaf | 904 | return i_size_read(inode) - (idx << PAGE_SHIFT); |
6296556f | 905 | else |
09cbfeaf | 906 | return (end - idx) << PAGE_SHIFT; |
6296556f PT |
907 | } |
908 | ||
6f018efa | 909 | static void |
96c9eae6 PT |
910 | bl_pg_init_write(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) |
911 | { | |
3a6fd1f0 CH |
912 | u64 wb_size; |
913 | ||
f35592a9 | 914 | if (!is_aligned_req(pgio, req, PAGE_SIZE, true)) { |
96c9eae6 | 915 | nfs_pageio_reset_write_mds(pgio); |
3a6fd1f0 | 916 | return; |
6296556f | 917 | } |
3a6fd1f0 CH |
918 | |
919 | if (pgio->pg_dreq == NULL) | |
920 | wb_size = pnfs_num_cont_bytes(pgio->pg_inode, | |
921 | req->wb_index); | |
922 | else | |
923 | wb_size = nfs_dreq_bytes_left(pgio->pg_dreq); | |
924 | ||
925 | pnfs_generic_pg_init_write(pgio, req, wb_size); | |
b3dce6a2 BC |
926 | |
927 | if (pgio->pg_lseg && | |
928 | test_bit(NFS_LSEG_UNAVAILABLE, &pgio->pg_lseg->pls_flags)) { | |
929 | ||
930 | pnfs_error_mark_layout_for_return(pgio->pg_inode, pgio->pg_lseg); | |
931 | pnfs_set_lo_fail(pgio->pg_lseg); | |
932 | nfs_pageio_reset_write_mds(pgio); | |
933 | } | |
96c9eae6 PT |
934 | } |
935 | ||
b4fdac1a WAA |
936 | /* |
937 | * Return 0 if @req cannot be coalesced into @pgio, otherwise return the number | |
938 | * of bytes (maximum @req->wb_bytes) that can be coalesced. | |
939 | */ | |
940 | static size_t | |
96c9eae6 PT |
941 | bl_pg_test_write(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, |
942 | struct nfs_page *req) | |
943 | { | |
f35592a9 | 944 | if (!is_aligned_req(pgio, req, PAGE_SIZE, true)) |
b4fdac1a | 945 | return 0; |
96c9eae6 PT |
946 | return pnfs_generic_pg_test(pgio, prev, req); |
947 | } | |
948 | ||
e9643fe8 | 949 | static const struct nfs_pageio_ops bl_pg_read_ops = { |
f742dc4a PT |
950 | .pg_init = bl_pg_init_read, |
951 | .pg_test = bl_pg_test_read, | |
e9643fe8 | 952 | .pg_doio = pnfs_generic_pg_readpages, |
180bb5ec | 953 | .pg_cleanup = pnfs_generic_pg_cleanup, |
e9643fe8 BH |
954 | }; |
955 | ||
956 | static const struct nfs_pageio_ops bl_pg_write_ops = { | |
96c9eae6 PT |
957 | .pg_init = bl_pg_init_write, |
958 | .pg_test = bl_pg_test_write, | |
e9643fe8 | 959 | .pg_doio = pnfs_generic_pg_writepages, |
180bb5ec | 960 | .pg_cleanup = pnfs_generic_pg_cleanup, |
e9643fe8 BH |
961 | }; |
962 | ||
155e7524 FI |
963 | static struct pnfs_layoutdriver_type blocklayout_type = { |
964 | .id = LAYOUT_BLOCK_VOLUME, | |
965 | .name = "LAYOUT_BLOCK_VOLUME", | |
5a12cca6 | 966 | .owner = THIS_MODULE, |
848746bd | 967 | .flags = PNFS_LAYOUTRET_ON_SETATTR | |
d78471d3 | 968 | PNFS_LAYOUTRET_ON_ERROR | |
848746bd | 969 | PNFS_READ_WHOLE_PAGE, |
155e7524 FI |
970 | .read_pagelist = bl_read_pagelist, |
971 | .write_pagelist = bl_write_pagelist, | |
972 | .alloc_layout_hdr = bl_alloc_layout_hdr, | |
973 | .free_layout_hdr = bl_free_layout_hdr, | |
974 | .alloc_lseg = bl_alloc_lseg, | |
975 | .free_lseg = bl_free_lseg, | |
71d5b763 | 976 | .return_range = bl_return_range, |
34dc93c2 | 977 | .prepare_layoutcommit = bl_prepare_layoutcommit, |
155e7524 FI |
978 | .cleanup_layoutcommit = bl_cleanup_layoutcommit, |
979 | .set_layoutdriver = bl_set_layoutdriver, | |
20d655d6 CH |
980 | .alloc_deviceid_node = bl_alloc_deviceid_node, |
981 | .free_deviceid_node = bl_free_deviceid_node, | |
e9643fe8 BH |
982 | .pg_read_ops = &bl_pg_read_ops, |
983 | .pg_write_ops = &bl_pg_write_ops, | |
5bb89b47 | 984 | .sync = pnfs_generic_sync, |
155e7524 FI |
985 | }; |
986 | ||
d9186c03 CH |
987 | static struct pnfs_layoutdriver_type scsilayout_type = { |
988 | .id = LAYOUT_SCSI, | |
989 | .name = "LAYOUT_SCSI", | |
990 | .owner = THIS_MODULE, | |
991 | .flags = PNFS_LAYOUTRET_ON_SETATTR | | |
d78471d3 | 992 | PNFS_LAYOUTRET_ON_ERROR | |
d9186c03 CH |
993 | PNFS_READ_WHOLE_PAGE, |
994 | .read_pagelist = bl_read_pagelist, | |
995 | .write_pagelist = bl_write_pagelist, | |
996 | .alloc_layout_hdr = sl_alloc_layout_hdr, | |
997 | .free_layout_hdr = bl_free_layout_hdr, | |
998 | .alloc_lseg = bl_alloc_lseg, | |
999 | .free_lseg = bl_free_lseg, | |
1000 | .return_range = bl_return_range, | |
1001 | .prepare_layoutcommit = bl_prepare_layoutcommit, | |
1002 | .cleanup_layoutcommit = bl_cleanup_layoutcommit, | |
1003 | .set_layoutdriver = bl_set_layoutdriver, | |
1004 | .alloc_deviceid_node = bl_alloc_deviceid_node, | |
1005 | .free_deviceid_node = bl_free_deviceid_node, | |
1006 | .pg_read_ops = &bl_pg_read_ops, | |
1007 | .pg_write_ops = &bl_pg_write_ops, | |
1008 | .sync = pnfs_generic_sync, | |
1009 | }; | |
1010 | ||
1011 | ||
155e7524 FI |
1012 | static int __init nfs4blocklayout_init(void) |
1013 | { | |
1014 | int ret; | |
1015 | ||
1016 | dprintk("%s: NFSv4 Block Layout Driver Registering...\n", __func__); | |
1017 | ||
d9186c03 | 1018 | ret = bl_init_pipefs(); |
fe0a9b74 JR |
1019 | if (ret) |
1020 | goto out; | |
d9186c03 CH |
1021 | |
1022 | ret = pnfs_register_layoutdriver(&blocklayout_type); | |
627f3066 | 1023 | if (ret) |
d9186c03 CH |
1024 | goto out_cleanup_pipe; |
1025 | ||
1026 | ret = pnfs_register_layoutdriver(&scsilayout_type); | |
1027 | if (ret) | |
1028 | goto out_unregister_block; | |
871760ce | 1029 | return 0; |
fe0a9b74 | 1030 | |
d9186c03 | 1031 | out_unregister_block: |
fe0a9b74 | 1032 | pnfs_unregister_layoutdriver(&blocklayout_type); |
d9186c03 CH |
1033 | out_cleanup_pipe: |
1034 | bl_cleanup_pipefs(); | |
871760ce | 1035 | out: |
155e7524 FI |
1036 | return ret; |
1037 | } | |
1038 | ||
1039 | static void __exit nfs4blocklayout_exit(void) | |
1040 | { | |
1041 | dprintk("%s: NFSv4 Block Layout Driver Unregistering...\n", | |
1042 | __func__); | |
1043 | ||
d9186c03 | 1044 | pnfs_unregister_layoutdriver(&scsilayout_type); |
155e7524 | 1045 | pnfs_unregister_layoutdriver(&blocklayout_type); |
d9186c03 | 1046 | bl_cleanup_pipefs(); |
155e7524 FI |
1047 | } |
1048 | ||
1049 | MODULE_ALIAS("nfs-layouttype4-3"); | |
ad6b0241 | 1050 | MODULE_ALIAS("nfs-layouttype4-5"); |
155e7524 FI |
1051 | |
1052 | module_init(nfs4blocklayout_init); | |
1053 | module_exit(nfs4blocklayout_exit); |