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6cbd5570 CM |
1 | /* |
2 | * Copyright (C) 2007 Oracle. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public | |
6 | * License v2 as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public | |
14 | * License along with this program; if not, write to the | |
15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
16 | * Boston, MA 021110-1307, USA. | |
17 | */ | |
18 | ||
e20d96d6 | 19 | #include <linux/fs.h> |
d98237b3 | 20 | #include <linux/blkdev.h> |
11bd143f | 21 | #include <linux/crc32c.h> |
87cbda5c | 22 | #include <linux/scatterlist.h> |
22b0ebda | 23 | #include <linux/swap.h> |
0f7d52f4 | 24 | #include <linux/radix-tree.h> |
35b7e476 | 25 | #include <linux/writeback.h> |
5f39d397 | 26 | #include <linux/buffer_head.h> // for block_sync_page |
ce9adaa5 | 27 | #include <linux/workqueue.h> |
eb60ceac CM |
28 | #include "ctree.h" |
29 | #include "disk-io.h" | |
e089f05c | 30 | #include "transaction.h" |
0f7d52f4 | 31 | #include "btrfs_inode.h" |
0b86a832 | 32 | #include "volumes.h" |
db94535d | 33 | #include "print-tree.h" |
eb60ceac | 34 | |
5f39d397 CM |
35 | #if 0 |
36 | static int check_tree_block(struct btrfs_root *root, struct extent_buffer *buf) | |
7eccb903 | 37 | { |
5f39d397 CM |
38 | if (extent_buffer_blocknr(buf) != btrfs_header_blocknr(buf)) { |
39 | printk(KERN_CRIT "buf blocknr(buf) is %llu, header is %llu\n", | |
40 | (unsigned long long)extent_buffer_blocknr(buf), | |
41 | (unsigned long long)btrfs_header_blocknr(buf)); | |
39279cc3 | 42 | return 1; |
d98237b3 | 43 | } |
9a8dd150 | 44 | return 0; |
eb60ceac | 45 | } |
5f39d397 | 46 | #endif |
eb60ceac | 47 | |
d1310b2e | 48 | static struct extent_io_ops btree_extent_io_ops; |
ce9adaa5 CM |
49 | static struct workqueue_struct *end_io_workqueue; |
50 | ||
51 | struct end_io_wq { | |
52 | struct bio *bio; | |
53 | bio_end_io_t *end_io; | |
54 | void *private; | |
55 | struct btrfs_fs_info *info; | |
56 | int error; | |
22c59948 | 57 | int metadata; |
ce9adaa5 CM |
58 | struct list_head list; |
59 | }; | |
0da5468f | 60 | |
5f39d397 | 61 | struct extent_map *btree_get_extent(struct inode *inode, struct page *page, |
d1310b2e | 62 | size_t page_offset, u64 start, u64 len, |
5f39d397 | 63 | int create) |
7eccb903 | 64 | { |
5f39d397 CM |
65 | struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; |
66 | struct extent_map *em; | |
67 | int ret; | |
68 | ||
69 | again: | |
d1310b2e CM |
70 | spin_lock(&em_tree->lock); |
71 | em = lookup_extent_mapping(em_tree, start, len); | |
72 | spin_unlock(&em_tree->lock); | |
5f39d397 CM |
73 | if (em) { |
74 | goto out; | |
7eccb903 | 75 | } |
5f39d397 CM |
76 | em = alloc_extent_map(GFP_NOFS); |
77 | if (!em) { | |
78 | em = ERR_PTR(-ENOMEM); | |
79 | goto out; | |
80 | } | |
81 | em->start = 0; | |
d1310b2e | 82 | em->len = i_size_read(inode); |
5f39d397 | 83 | em->block_start = 0; |
5f39d397 | 84 | em->bdev = inode->i_sb->s_bdev; |
d1310b2e CM |
85 | |
86 | spin_lock(&em_tree->lock); | |
5f39d397 | 87 | ret = add_extent_mapping(em_tree, em); |
d1310b2e CM |
88 | spin_unlock(&em_tree->lock); |
89 | ||
5f39d397 CM |
90 | if (ret == -EEXIST) { |
91 | free_extent_map(em); | |
92 | em = NULL; | |
93 | goto again; | |
94 | } else if (ret) { | |
95 | em = ERR_PTR(ret); | |
96 | } | |
97 | out: | |
98 | return em; | |
7eccb903 CM |
99 | } |
100 | ||
19c00ddc CM |
101 | u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len) |
102 | { | |
103 | return crc32c(seed, data, len); | |
104 | } | |
105 | ||
106 | void btrfs_csum_final(u32 crc, char *result) | |
107 | { | |
108 | *(__le32 *)result = ~cpu_to_le32(crc); | |
109 | } | |
110 | ||
111 | static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf, | |
112 | int verify) | |
113 | { | |
114 | char result[BTRFS_CRC32_SIZE]; | |
115 | unsigned long len; | |
116 | unsigned long cur_len; | |
117 | unsigned long offset = BTRFS_CSUM_SIZE; | |
118 | char *map_token = NULL; | |
119 | char *kaddr; | |
120 | unsigned long map_start; | |
121 | unsigned long map_len; | |
122 | int err; | |
123 | u32 crc = ~(u32)0; | |
124 | ||
125 | len = buf->len - offset; | |
126 | while(len > 0) { | |
127 | err = map_private_extent_buffer(buf, offset, 32, | |
128 | &map_token, &kaddr, | |
129 | &map_start, &map_len, KM_USER0); | |
130 | if (err) { | |
131 | printk("failed to map extent buffer! %lu\n", | |
132 | offset); | |
133 | return 1; | |
134 | } | |
135 | cur_len = min(len, map_len - (offset - map_start)); | |
136 | crc = btrfs_csum_data(root, kaddr + offset - map_start, | |
137 | crc, cur_len); | |
138 | len -= cur_len; | |
139 | offset += cur_len; | |
140 | unmap_extent_buffer(buf, map_token, KM_USER0); | |
141 | } | |
142 | btrfs_csum_final(crc, result); | |
143 | ||
144 | if (verify) { | |
e4204ded CM |
145 | int from_this_trans = 0; |
146 | ||
147 | if (root->fs_info->running_transaction && | |
148 | btrfs_header_generation(buf) == | |
149 | root->fs_info->running_transaction->transid) | |
150 | from_this_trans = 1; | |
151 | ||
152 | /* FIXME, this is not good */ | |
63b10fc4 | 153 | if (memcmp_extent_buffer(buf, result, 0, BTRFS_CRC32_SIZE)) { |
e4204ded CM |
154 | u32 val; |
155 | u32 found = 0; | |
156 | memcpy(&found, result, BTRFS_CRC32_SIZE); | |
157 | ||
158 | read_extent_buffer(buf, &val, 0, BTRFS_CRC32_SIZE); | |
159 | printk("btrfs: %s checksum verify failed on %llu " | |
63b10fc4 CM |
160 | "wanted %X found %X from_this_trans %d " |
161 | "level %d\n", | |
19c00ddc | 162 | root->fs_info->sb->s_id, |
63b10fc4 CM |
163 | buf->start, val, found, from_this_trans, |
164 | btrfs_header_level(buf)); | |
19c00ddc CM |
165 | return 1; |
166 | } | |
167 | } else { | |
168 | write_extent_buffer(buf, result, 0, BTRFS_CRC32_SIZE); | |
169 | } | |
170 | return 0; | |
171 | } | |
172 | ||
f188591e CM |
173 | static int btree_read_extent_buffer_pages(struct btrfs_root *root, |
174 | struct extent_buffer *eb, | |
175 | u64 start) | |
176 | { | |
177 | struct extent_io_tree *io_tree; | |
178 | int ret; | |
179 | int num_copies = 0; | |
180 | int mirror_num = 0; | |
181 | ||
182 | io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree; | |
183 | while (1) { | |
184 | ret = read_extent_buffer_pages(io_tree, eb, start, 1, | |
185 | btree_get_extent, mirror_num); | |
186 | if (!ret) { | |
187 | if (mirror_num) | |
188 | printk("good read %Lu mirror %d total %d\n", eb->start, mirror_num, num_copies); | |
189 | return ret; | |
190 | } | |
191 | num_copies = btrfs_num_copies(&root->fs_info->mapping_tree, | |
192 | eb->start, eb->len); | |
193 | printk("failed to read %Lu mirror %d total %d\n", eb->start, mirror_num, num_copies); | |
194 | if (num_copies == 1) { | |
195 | printk("reading %Lu failed only one copy\n", eb->start); | |
196 | return ret; | |
197 | } | |
198 | mirror_num++; | |
199 | if (mirror_num > num_copies) { | |
200 | printk("bailing at mirror %d of %d\n", mirror_num, num_copies); | |
201 | return ret; | |
202 | } | |
203 | } | |
204 | printk("read extent buffer page last\n"); | |
205 | return -EIO; | |
206 | } | |
19c00ddc CM |
207 | |
208 | int csum_dirty_buffer(struct btrfs_root *root, struct page *page) | |
209 | { | |
d1310b2e | 210 | struct extent_io_tree *tree; |
35ebb934 | 211 | u64 start = (u64)page->index << PAGE_CACHE_SHIFT; |
19c00ddc CM |
212 | u64 found_start; |
213 | int found_level; | |
214 | unsigned long len; | |
215 | struct extent_buffer *eb; | |
f188591e CM |
216 | int ret; |
217 | ||
d1310b2e | 218 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
19c00ddc CM |
219 | |
220 | if (page->private == EXTENT_PAGE_PRIVATE) | |
221 | goto out; | |
222 | if (!page->private) | |
223 | goto out; | |
224 | len = page->private >> 2; | |
225 | if (len == 0) { | |
226 | WARN_ON(1); | |
227 | } | |
228 | eb = alloc_extent_buffer(tree, start, len, page, GFP_NOFS); | |
f188591e CM |
229 | ret = btree_read_extent_buffer_pages(root, eb, start + PAGE_CACHE_SIZE); |
230 | BUG_ON(ret); | |
e18e4809 | 231 | btrfs_clear_buffer_defrag(eb); |
19c00ddc CM |
232 | found_start = btrfs_header_bytenr(eb); |
233 | if (found_start != start) { | |
234 | printk("warning: eb start incorrect %Lu buffer %Lu len %lu\n", | |
235 | start, found_start, len); | |
55c69072 CM |
236 | WARN_ON(1); |
237 | goto err; | |
238 | } | |
239 | if (eb->first_page != page) { | |
240 | printk("bad first page %lu %lu\n", eb->first_page->index, | |
241 | page->index); | |
242 | WARN_ON(1); | |
243 | goto err; | |
244 | } | |
245 | if (!PageUptodate(page)) { | |
246 | printk("csum not up to date page %lu\n", page->index); | |
247 | WARN_ON(1); | |
248 | goto err; | |
19c00ddc CM |
249 | } |
250 | found_level = btrfs_header_level(eb); | |
63b10fc4 CM |
251 | spin_lock(&root->fs_info->hash_lock); |
252 | btrfs_set_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN); | |
253 | spin_unlock(&root->fs_info->hash_lock); | |
19c00ddc | 254 | csum_tree_block(root, eb, 0); |
55c69072 | 255 | err: |
19c00ddc CM |
256 | free_extent_buffer(eb); |
257 | out: | |
258 | return 0; | |
259 | } | |
260 | ||
0da5468f | 261 | static int btree_writepage_io_hook(struct page *page, u64 start, u64 end) |
d98237b3 | 262 | { |
19c00ddc | 263 | struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; |
19c00ddc CM |
264 | |
265 | csum_dirty_buffer(root, page); | |
0da5468f CM |
266 | return 0; |
267 | } | |
268 | ||
ce9adaa5 CM |
269 | int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end, |
270 | struct extent_state *state) | |
271 | { | |
272 | struct extent_io_tree *tree; | |
273 | u64 found_start; | |
274 | int found_level; | |
275 | unsigned long len; | |
276 | struct extent_buffer *eb; | |
277 | struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; | |
f188591e | 278 | int ret = 0; |
ce9adaa5 CM |
279 | |
280 | tree = &BTRFS_I(page->mapping->host)->io_tree; | |
281 | if (page->private == EXTENT_PAGE_PRIVATE) | |
282 | goto out; | |
283 | if (!page->private) | |
284 | goto out; | |
285 | len = page->private >> 2; | |
286 | if (len == 0) { | |
287 | WARN_ON(1); | |
288 | } | |
289 | eb = alloc_extent_buffer(tree, start, len, page, GFP_NOFS); | |
f188591e | 290 | |
ce9adaa5 CM |
291 | btrfs_clear_buffer_defrag(eb); |
292 | found_start = btrfs_header_bytenr(eb); | |
293 | if (found_start != start) { | |
f188591e CM |
294 | printk("bad start on %Lu found %Lu\n", eb->start, found_start); |
295 | ret = -EIO; | |
ce9adaa5 CM |
296 | goto err; |
297 | } | |
298 | if (eb->first_page != page) { | |
299 | printk("bad first page %lu %lu\n", eb->first_page->index, | |
300 | page->index); | |
301 | WARN_ON(1); | |
f188591e | 302 | ret = -EIO; |
ce9adaa5 CM |
303 | goto err; |
304 | } | |
305 | found_level = btrfs_header_level(eb); | |
306 | ||
307 | ret = csum_tree_block(root, eb, 1); | |
f188591e CM |
308 | if (ret) |
309 | ret = -EIO; | |
ce9adaa5 CM |
310 | |
311 | end = min_t(u64, eb->len, PAGE_CACHE_SIZE); | |
312 | end = eb->start + end - 1; | |
313 | release_extent_buffer_tail_pages(eb); | |
314 | err: | |
315 | free_extent_buffer(eb); | |
316 | out: | |
f188591e | 317 | return ret; |
ce9adaa5 CM |
318 | } |
319 | ||
320 | #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,23) | |
321 | static void end_workqueue_bio(struct bio *bio, int err) | |
322 | #else | |
323 | static int end_workqueue_bio(struct bio *bio, | |
324 | unsigned int bytes_done, int err) | |
325 | #endif | |
326 | { | |
327 | struct end_io_wq *end_io_wq = bio->bi_private; | |
328 | struct btrfs_fs_info *fs_info; | |
329 | unsigned long flags; | |
330 | ||
331 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,23) | |
332 | if (bio->bi_size) | |
333 | return 1; | |
334 | #endif | |
335 | ||
336 | fs_info = end_io_wq->info; | |
337 | spin_lock_irqsave(&fs_info->end_io_work_lock, flags); | |
338 | end_io_wq->error = err; | |
339 | list_add_tail(&end_io_wq->list, &fs_info->end_io_work_list); | |
340 | spin_unlock_irqrestore(&fs_info->end_io_work_lock, flags); | |
341 | queue_work(end_io_workqueue, &fs_info->end_io_work); | |
342 | ||
343 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,23) | |
344 | return 0; | |
345 | #endif | |
346 | } | |
347 | ||
22c59948 CM |
348 | int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, |
349 | int metadata) | |
0b86a832 | 350 | { |
ce9adaa5 | 351 | struct end_io_wq *end_io_wq; |
ce9adaa5 CM |
352 | end_io_wq = kmalloc(sizeof(*end_io_wq), GFP_NOFS); |
353 | if (!end_io_wq) | |
354 | return -ENOMEM; | |
355 | ||
356 | end_io_wq->private = bio->bi_private; | |
357 | end_io_wq->end_io = bio->bi_end_io; | |
22c59948 | 358 | end_io_wq->info = info; |
ce9adaa5 CM |
359 | end_io_wq->error = 0; |
360 | end_io_wq->bio = bio; | |
22c59948 | 361 | end_io_wq->metadata = metadata; |
ce9adaa5 CM |
362 | |
363 | bio->bi_private = end_io_wq; | |
364 | bio->bi_end_io = end_workqueue_bio; | |
22c59948 CM |
365 | return 0; |
366 | } | |
367 | ||
f188591e CM |
368 | static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, |
369 | int mirror_num) | |
22c59948 CM |
370 | { |
371 | struct btrfs_root *root = BTRFS_I(inode)->root; | |
372 | u64 offset; | |
373 | int ret; | |
374 | ||
375 | offset = bio->bi_sector << 9; | |
376 | ||
377 | if (rw & (1 << BIO_RW)) { | |
f188591e | 378 | return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num); |
22c59948 CM |
379 | } |
380 | ||
381 | ret = btrfs_bio_wq_end_io(root->fs_info, bio, 1); | |
382 | BUG_ON(ret); | |
ce9adaa5 | 383 | |
0b86a832 | 384 | if (offset == BTRFS_SUPER_INFO_OFFSET) { |
f2984462 | 385 | bio->bi_bdev = root->fs_info->fs_devices->latest_bdev; |
0b86a832 CM |
386 | submit_bio(rw, bio); |
387 | return 0; | |
388 | } | |
f188591e | 389 | return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num); |
0b86a832 CM |
390 | } |
391 | ||
0da5468f CM |
392 | static int btree_writepage(struct page *page, struct writeback_control *wbc) |
393 | { | |
d1310b2e CM |
394 | struct extent_io_tree *tree; |
395 | tree = &BTRFS_I(page->mapping->host)->io_tree; | |
5f39d397 CM |
396 | return extent_write_full_page(tree, page, btree_get_extent, wbc); |
397 | } | |
0da5468f CM |
398 | |
399 | static int btree_writepages(struct address_space *mapping, | |
400 | struct writeback_control *wbc) | |
401 | { | |
d1310b2e CM |
402 | struct extent_io_tree *tree; |
403 | tree = &BTRFS_I(mapping->host)->io_tree; | |
d8d5f3e1 | 404 | if (wbc->sync_mode == WB_SYNC_NONE) { |
793955bc CM |
405 | u64 num_dirty; |
406 | u64 start = 0; | |
407 | unsigned long thresh = 96 * 1024 * 1024; | |
448d640b CM |
408 | |
409 | if (wbc->for_kupdate) | |
410 | return 0; | |
411 | ||
ca664626 CM |
412 | if (current_is_pdflush()) { |
413 | thresh = 96 * 1024 * 1024; | |
414 | } else { | |
415 | thresh = 8 * 1024 * 1024; | |
416 | } | |
1832a6d5 CM |
417 | num_dirty = count_range_bits(tree, &start, (u64)-1, |
418 | thresh, EXTENT_DIRTY); | |
793955bc CM |
419 | if (num_dirty < thresh) { |
420 | return 0; | |
421 | } | |
422 | } | |
0da5468f CM |
423 | return extent_writepages(tree, mapping, btree_get_extent, wbc); |
424 | } | |
425 | ||
5f39d397 CM |
426 | int btree_readpage(struct file *file, struct page *page) |
427 | { | |
d1310b2e CM |
428 | struct extent_io_tree *tree; |
429 | tree = &BTRFS_I(page->mapping->host)->io_tree; | |
5f39d397 CM |
430 | return extent_read_full_page(tree, page, btree_get_extent); |
431 | } | |
22b0ebda | 432 | |
70dec807 | 433 | static int btree_releasepage(struct page *page, gfp_t gfp_flags) |
5f39d397 | 434 | { |
d1310b2e CM |
435 | struct extent_io_tree *tree; |
436 | struct extent_map_tree *map; | |
5f39d397 | 437 | int ret; |
d98237b3 | 438 | |
d1310b2e CM |
439 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
440 | map = &BTRFS_I(page->mapping->host)->extent_tree; | |
70dec807 | 441 | ret = try_release_extent_mapping(map, tree, page, gfp_flags); |
5f39d397 | 442 | if (ret == 1) { |
728131d8 | 443 | invalidate_extent_lru(tree, page_offset(page), PAGE_CACHE_SIZE); |
5f39d397 CM |
444 | ClearPagePrivate(page); |
445 | set_page_private(page, 0); | |
446 | page_cache_release(page); | |
447 | } | |
d98237b3 CM |
448 | return ret; |
449 | } | |
450 | ||
5f39d397 | 451 | static void btree_invalidatepage(struct page *page, unsigned long offset) |
d98237b3 | 452 | { |
d1310b2e CM |
453 | struct extent_io_tree *tree; |
454 | tree = &BTRFS_I(page->mapping->host)->io_tree; | |
5f39d397 CM |
455 | extent_invalidatepage(tree, page, offset); |
456 | btree_releasepage(page, GFP_NOFS); | |
d98237b3 CM |
457 | } |
458 | ||
5f39d397 | 459 | #if 0 |
d98237b3 | 460 | static int btree_writepage(struct page *page, struct writeback_control *wbc) |
ed2ff2cb | 461 | { |
87cbda5c | 462 | struct buffer_head *bh; |
0f7d52f4 | 463 | struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; |
87cbda5c | 464 | struct buffer_head *head; |
87cbda5c CM |
465 | if (!page_has_buffers(page)) { |
466 | create_empty_buffers(page, root->fs_info->sb->s_blocksize, | |
467 | (1 << BH_Dirty)|(1 << BH_Uptodate)); | |
468 | } | |
469 | head = page_buffers(page); | |
470 | bh = head; | |
471 | do { | |
472 | if (buffer_dirty(bh)) | |
473 | csum_tree_block(root, bh, 0); | |
474 | bh = bh->b_this_page; | |
475 | } while (bh != head); | |
d98237b3 | 476 | return block_write_full_page(page, btree_get_block, wbc); |
ed2ff2cb | 477 | } |
5f39d397 | 478 | #endif |
eb60ceac | 479 | |
d98237b3 CM |
480 | static struct address_space_operations btree_aops = { |
481 | .readpage = btree_readpage, | |
482 | .writepage = btree_writepage, | |
0da5468f | 483 | .writepages = btree_writepages, |
5f39d397 CM |
484 | .releasepage = btree_releasepage, |
485 | .invalidatepage = btree_invalidatepage, | |
d98237b3 CM |
486 | .sync_page = block_sync_page, |
487 | }; | |
488 | ||
db94535d | 489 | int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize) |
090d1875 | 490 | { |
5f39d397 CM |
491 | struct extent_buffer *buf = NULL; |
492 | struct inode *btree_inode = root->fs_info->btree_inode; | |
de428b63 | 493 | int ret = 0; |
090d1875 | 494 | |
db94535d | 495 | buf = btrfs_find_create_tree_block(root, bytenr, blocksize); |
5f39d397 | 496 | if (!buf) |
090d1875 | 497 | return 0; |
d1310b2e | 498 | read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree, |
f188591e | 499 | buf, 0, 0, btree_get_extent, 0); |
5f39d397 | 500 | free_extent_buffer(buf); |
de428b63 | 501 | return ret; |
090d1875 CM |
502 | } |
503 | ||
0b86a832 CM |
504 | static int close_all_devices(struct btrfs_fs_info *fs_info) |
505 | { | |
506 | struct list_head *list; | |
507 | struct list_head *next; | |
508 | struct btrfs_device *device; | |
509 | ||
8a4b83cc CM |
510 | list = &fs_info->fs_devices->devices; |
511 | list_for_each(next, list) { | |
0b86a832 | 512 | device = list_entry(next, struct btrfs_device, dev_list); |
8a4b83cc CM |
513 | if (device->bdev && device->bdev != fs_info->sb->s_bdev) |
514 | close_bdev_excl(device->bdev); | |
515 | device->bdev = NULL; | |
0b86a832 CM |
516 | } |
517 | return 0; | |
518 | } | |
519 | ||
0999df54 CM |
520 | int btrfs_verify_block_csum(struct btrfs_root *root, |
521 | struct extent_buffer *buf) | |
eb60ceac | 522 | { |
ce9adaa5 | 523 | return btrfs_buffer_uptodate(buf); |
0999df54 CM |
524 | } |
525 | ||
526 | struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, | |
527 | u64 bytenr, u32 blocksize) | |
528 | { | |
529 | struct inode *btree_inode = root->fs_info->btree_inode; | |
530 | struct extent_buffer *eb; | |
531 | eb = find_extent_buffer(&BTRFS_I(btree_inode)->io_tree, | |
532 | bytenr, blocksize, GFP_NOFS); | |
533 | return eb; | |
534 | } | |
535 | ||
536 | struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, | |
537 | u64 bytenr, u32 blocksize) | |
538 | { | |
539 | struct inode *btree_inode = root->fs_info->btree_inode; | |
540 | struct extent_buffer *eb; | |
541 | ||
542 | eb = alloc_extent_buffer(&BTRFS_I(btree_inode)->io_tree, | |
543 | bytenr, blocksize, NULL, GFP_NOFS); | |
544 | return eb; | |
545 | } | |
546 | ||
547 | ||
548 | struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, | |
549 | u32 blocksize) | |
550 | { | |
551 | struct extent_buffer *buf = NULL; | |
552 | struct inode *btree_inode = root->fs_info->btree_inode; | |
553 | struct extent_io_tree *io_tree; | |
554 | int ret; | |
555 | ||
556 | io_tree = &BTRFS_I(btree_inode)->io_tree; | |
557 | ||
558 | buf = btrfs_find_create_tree_block(root, bytenr, blocksize); | |
559 | if (!buf) | |
560 | return NULL; | |
0999df54 | 561 | |
f188591e | 562 | ret = btree_read_extent_buffer_pages(root, buf, 0); |
ce9adaa5 CM |
563 | |
564 | if (ret == 0) { | |
565 | buf->flags |= EXTENT_UPTODATE; | |
566 | } | |
5f39d397 | 567 | return buf; |
ce9adaa5 | 568 | |
eb60ceac CM |
569 | } |
570 | ||
e089f05c | 571 | int clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
5f39d397 | 572 | struct extent_buffer *buf) |
ed2ff2cb | 573 | { |
5f39d397 | 574 | struct inode *btree_inode = root->fs_info->btree_inode; |
55c69072 CM |
575 | if (btrfs_header_generation(buf) == |
576 | root->fs_info->running_transaction->transid) | |
d1310b2e | 577 | clear_extent_buffer_dirty(&BTRFS_I(btree_inode)->io_tree, |
55c69072 | 578 | buf); |
5f39d397 CM |
579 | return 0; |
580 | } | |
581 | ||
582 | int wait_on_tree_block_writeback(struct btrfs_root *root, | |
583 | struct extent_buffer *buf) | |
584 | { | |
585 | struct inode *btree_inode = root->fs_info->btree_inode; | |
d1310b2e | 586 | wait_on_extent_buffer_writeback(&BTRFS_I(btree_inode)->io_tree, |
5f39d397 CM |
587 | buf); |
588 | return 0; | |
589 | } | |
590 | ||
db94535d | 591 | static int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, |
87ee04eb | 592 | u32 stripesize, struct btrfs_root *root, |
9f5fae2f | 593 | struct btrfs_fs_info *fs_info, |
e20d96d6 | 594 | u64 objectid) |
d97e63b6 | 595 | { |
cfaa7295 | 596 | root->node = NULL; |
0f7d52f4 | 597 | root->inode = NULL; |
a28ec197 | 598 | root->commit_root = NULL; |
db94535d CM |
599 | root->sectorsize = sectorsize; |
600 | root->nodesize = nodesize; | |
601 | root->leafsize = leafsize; | |
87ee04eb | 602 | root->stripesize = stripesize; |
123abc88 | 603 | root->ref_cows = 0; |
0b86a832 CM |
604 | root->track_dirty = 0; |
605 | ||
9f5fae2f | 606 | root->fs_info = fs_info; |
0f7d52f4 CM |
607 | root->objectid = objectid; |
608 | root->last_trans = 0; | |
1b05da2e CM |
609 | root->highest_inode = 0; |
610 | root->last_inode_alloc = 0; | |
58176a96 | 611 | root->name = NULL; |
4313b399 | 612 | root->in_sysfs = 0; |
0b86a832 CM |
613 | |
614 | INIT_LIST_HEAD(&root->dirty_list); | |
3768f368 CM |
615 | memset(&root->root_key, 0, sizeof(root->root_key)); |
616 | memset(&root->root_item, 0, sizeof(root->root_item)); | |
6702ed49 | 617 | memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); |
58176a96 JB |
618 | memset(&root->root_kobj, 0, sizeof(root->root_kobj)); |
619 | init_completion(&root->kobj_unregister); | |
6702ed49 CM |
620 | root->defrag_running = 0; |
621 | root->defrag_level = 0; | |
4d775673 | 622 | root->root_key.objectid = objectid; |
3768f368 CM |
623 | return 0; |
624 | } | |
625 | ||
db94535d | 626 | static int find_and_setup_root(struct btrfs_root *tree_root, |
9f5fae2f CM |
627 | struct btrfs_fs_info *fs_info, |
628 | u64 objectid, | |
e20d96d6 | 629 | struct btrfs_root *root) |
3768f368 CM |
630 | { |
631 | int ret; | |
db94535d | 632 | u32 blocksize; |
3768f368 | 633 | |
db94535d | 634 | __setup_root(tree_root->nodesize, tree_root->leafsize, |
87ee04eb CM |
635 | tree_root->sectorsize, tree_root->stripesize, |
636 | root, fs_info, objectid); | |
3768f368 CM |
637 | ret = btrfs_find_last_root(tree_root, objectid, |
638 | &root->root_item, &root->root_key); | |
639 | BUG_ON(ret); | |
640 | ||
db94535d CM |
641 | blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); |
642 | root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), | |
643 | blocksize); | |
3768f368 | 644 | BUG_ON(!root->node); |
d97e63b6 CM |
645 | return 0; |
646 | } | |
647 | ||
5eda7b5e CM |
648 | struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_fs_info *fs_info, |
649 | struct btrfs_key *location) | |
0f7d52f4 CM |
650 | { |
651 | struct btrfs_root *root; | |
652 | struct btrfs_root *tree_root = fs_info->tree_root; | |
653 | struct btrfs_path *path; | |
5f39d397 | 654 | struct extent_buffer *l; |
1b05da2e | 655 | u64 highest_inode; |
db94535d | 656 | u32 blocksize; |
0f7d52f4 CM |
657 | int ret = 0; |
658 | ||
5eda7b5e | 659 | root = kzalloc(sizeof(*root), GFP_NOFS); |
0cf6c620 | 660 | if (!root) |
0f7d52f4 | 661 | return ERR_PTR(-ENOMEM); |
0f7d52f4 | 662 | if (location->offset == (u64)-1) { |
db94535d | 663 | ret = find_and_setup_root(tree_root, fs_info, |
0f7d52f4 CM |
664 | location->objectid, root); |
665 | if (ret) { | |
0f7d52f4 CM |
666 | kfree(root); |
667 | return ERR_PTR(ret); | |
668 | } | |
669 | goto insert; | |
670 | } | |
671 | ||
db94535d | 672 | __setup_root(tree_root->nodesize, tree_root->leafsize, |
87ee04eb CM |
673 | tree_root->sectorsize, tree_root->stripesize, |
674 | root, fs_info, location->objectid); | |
0f7d52f4 CM |
675 | |
676 | path = btrfs_alloc_path(); | |
677 | BUG_ON(!path); | |
678 | ret = btrfs_search_slot(NULL, tree_root, location, path, 0, 0); | |
679 | if (ret != 0) { | |
0f7d52f4 CM |
680 | if (ret > 0) |
681 | ret = -ENOENT; | |
682 | goto out; | |
683 | } | |
5f39d397 CM |
684 | l = path->nodes[0]; |
685 | read_extent_buffer(l, &root->root_item, | |
686 | btrfs_item_ptr_offset(l, path->slots[0]), | |
0f7d52f4 | 687 | sizeof(root->root_item)); |
44b36eb2 | 688 | memcpy(&root->root_key, location, sizeof(*location)); |
0f7d52f4 CM |
689 | ret = 0; |
690 | out: | |
691 | btrfs_release_path(root, path); | |
692 | btrfs_free_path(path); | |
693 | if (ret) { | |
694 | kfree(root); | |
695 | return ERR_PTR(ret); | |
696 | } | |
db94535d CM |
697 | blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); |
698 | root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), | |
699 | blocksize); | |
0f7d52f4 CM |
700 | BUG_ON(!root->node); |
701 | insert: | |
0f7d52f4 | 702 | root->ref_cows = 1; |
5eda7b5e CM |
703 | ret = btrfs_find_highest_inode(root, &highest_inode); |
704 | if (ret == 0) { | |
705 | root->highest_inode = highest_inode; | |
706 | root->last_inode_alloc = highest_inode; | |
707 | } | |
708 | return root; | |
709 | } | |
710 | ||
dc17ff8f CM |
711 | struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info, |
712 | u64 root_objectid) | |
713 | { | |
714 | struct btrfs_root *root; | |
715 | ||
716 | if (root_objectid == BTRFS_ROOT_TREE_OBJECTID) | |
717 | return fs_info->tree_root; | |
718 | if (root_objectid == BTRFS_EXTENT_TREE_OBJECTID) | |
719 | return fs_info->extent_root; | |
720 | ||
721 | root = radix_tree_lookup(&fs_info->fs_roots_radix, | |
722 | (unsigned long)root_objectid); | |
723 | return root; | |
724 | } | |
725 | ||
edbd8d4e CM |
726 | struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info, |
727 | struct btrfs_key *location) | |
5eda7b5e CM |
728 | { |
729 | struct btrfs_root *root; | |
730 | int ret; | |
731 | ||
edbd8d4e CM |
732 | if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) |
733 | return fs_info->tree_root; | |
734 | if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) | |
735 | return fs_info->extent_root; | |
736 | ||
5eda7b5e CM |
737 | root = radix_tree_lookup(&fs_info->fs_roots_radix, |
738 | (unsigned long)location->objectid); | |
739 | if (root) | |
740 | return root; | |
741 | ||
742 | root = btrfs_read_fs_root_no_radix(fs_info, location); | |
743 | if (IS_ERR(root)) | |
744 | return root; | |
2619ba1f CM |
745 | ret = radix_tree_insert(&fs_info->fs_roots_radix, |
746 | (unsigned long)root->root_key.objectid, | |
0f7d52f4 CM |
747 | root); |
748 | if (ret) { | |
5f39d397 | 749 | free_extent_buffer(root->node); |
0f7d52f4 CM |
750 | kfree(root); |
751 | return ERR_PTR(ret); | |
752 | } | |
edbd8d4e CM |
753 | ret = btrfs_find_dead_roots(fs_info->tree_root, |
754 | root->root_key.objectid, root); | |
755 | BUG_ON(ret); | |
756 | ||
757 | return root; | |
758 | } | |
759 | ||
760 | struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info, | |
761 | struct btrfs_key *location, | |
762 | const char *name, int namelen) | |
763 | { | |
764 | struct btrfs_root *root; | |
765 | int ret; | |
766 | ||
767 | root = btrfs_read_fs_root_no_name(fs_info, location); | |
768 | if (!root) | |
769 | return NULL; | |
58176a96 | 770 | |
4313b399 CM |
771 | if (root->in_sysfs) |
772 | return root; | |
773 | ||
58176a96 JB |
774 | ret = btrfs_set_root_name(root, name, namelen); |
775 | if (ret) { | |
5f39d397 | 776 | free_extent_buffer(root->node); |
58176a96 JB |
777 | kfree(root); |
778 | return ERR_PTR(ret); | |
779 | } | |
780 | ||
781 | ret = btrfs_sysfs_add_root(root); | |
782 | if (ret) { | |
5f39d397 | 783 | free_extent_buffer(root->node); |
58176a96 JB |
784 | kfree(root->name); |
785 | kfree(root); | |
786 | return ERR_PTR(ret); | |
787 | } | |
4313b399 | 788 | root->in_sysfs = 1; |
0f7d52f4 CM |
789 | return root; |
790 | } | |
19c00ddc CM |
791 | #if 0 |
792 | static int add_hasher(struct btrfs_fs_info *info, char *type) { | |
793 | struct btrfs_hasher *hasher; | |
794 | ||
795 | hasher = kmalloc(sizeof(*hasher), GFP_NOFS); | |
796 | if (!hasher) | |
797 | return -ENOMEM; | |
798 | hasher->hash_tfm = crypto_alloc_hash(type, 0, CRYPTO_ALG_ASYNC); | |
799 | if (!hasher->hash_tfm) { | |
800 | kfree(hasher); | |
801 | return -EINVAL; | |
802 | } | |
803 | spin_lock(&info->hash_lock); | |
804 | list_add(&hasher->list, &info->hashers); | |
805 | spin_unlock(&info->hash_lock); | |
806 | return 0; | |
807 | } | |
808 | #endif | |
04160088 CM |
809 | |
810 | static int btrfs_congested_fn(void *congested_data, int bdi_bits) | |
811 | { | |
812 | struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; | |
813 | int ret = 0; | |
814 | struct list_head *cur; | |
815 | struct btrfs_device *device; | |
816 | struct backing_dev_info *bdi; | |
817 | ||
818 | list_for_each(cur, &info->fs_devices->devices) { | |
819 | device = list_entry(cur, struct btrfs_device, dev_list); | |
820 | bdi = blk_get_backing_dev_info(device->bdev); | |
821 | if (bdi && bdi_congested(bdi, bdi_bits)) { | |
822 | ret = 1; | |
823 | break; | |
824 | } | |
825 | } | |
826 | return ret; | |
827 | } | |
828 | ||
829 | void btrfs_unplug_io_fn(struct backing_dev_info *bdi, struct page *page) | |
830 | { | |
831 | struct list_head *cur; | |
832 | struct btrfs_device *device; | |
833 | struct btrfs_fs_info *info; | |
834 | ||
835 | info = (struct btrfs_fs_info *)bdi->unplug_io_data; | |
836 | list_for_each(cur, &info->fs_devices->devices) { | |
837 | device = list_entry(cur, struct btrfs_device, dev_list); | |
838 | bdi = blk_get_backing_dev_info(device->bdev); | |
839 | if (bdi->unplug_io_fn) { | |
840 | bdi->unplug_io_fn(bdi, page); | |
841 | } | |
842 | } | |
843 | } | |
844 | ||
845 | static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) | |
846 | { | |
847 | bdi_init(bdi); | |
83041add | 848 | bdi->ra_pages = default_backing_dev_info.ra_pages * 4; |
04160088 CM |
849 | bdi->state = 0; |
850 | bdi->capabilities = default_backing_dev_info.capabilities; | |
851 | bdi->unplug_io_fn = btrfs_unplug_io_fn; | |
852 | bdi->unplug_io_data = info; | |
853 | bdi->congested_fn = btrfs_congested_fn; | |
854 | bdi->congested_data = info; | |
855 | return 0; | |
856 | } | |
857 | ||
ce9adaa5 CM |
858 | static int bio_ready_for_csum(struct bio *bio) |
859 | { | |
860 | u64 length = 0; | |
861 | u64 buf_len = 0; | |
862 | u64 start = 0; | |
863 | struct page *page; | |
864 | struct extent_io_tree *io_tree = NULL; | |
865 | struct btrfs_fs_info *info = NULL; | |
866 | struct bio_vec *bvec; | |
867 | int i; | |
868 | int ret; | |
869 | ||
870 | bio_for_each_segment(bvec, bio, i) { | |
871 | page = bvec->bv_page; | |
872 | if (page->private == EXTENT_PAGE_PRIVATE) { | |
873 | length += bvec->bv_len; | |
874 | continue; | |
875 | } | |
876 | if (!page->private) { | |
877 | length += bvec->bv_len; | |
878 | continue; | |
879 | } | |
880 | length = bvec->bv_len; | |
881 | buf_len = page->private >> 2; | |
882 | start = page_offset(page) + bvec->bv_offset; | |
883 | io_tree = &BTRFS_I(page->mapping->host)->io_tree; | |
884 | info = BTRFS_I(page->mapping->host)->root->fs_info; | |
885 | } | |
886 | /* are we fully contained in this bio? */ | |
887 | if (buf_len <= length) | |
888 | return 1; | |
889 | ||
890 | ret = extent_range_uptodate(io_tree, start + length, | |
891 | start + buf_len - 1); | |
892 | if (ret == 1) | |
893 | return ret; | |
894 | return ret; | |
895 | } | |
896 | ||
897 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18) | |
898 | void btrfs_end_io_csum(void *p) | |
899 | #else | |
900 | void btrfs_end_io_csum(struct work_struct *work) | |
901 | #endif | |
902 | { | |
903 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18) | |
904 | struct btrfs_fs_info *fs_info = p; | |
905 | #else | |
906 | struct btrfs_fs_info *fs_info = container_of(work, | |
907 | struct btrfs_fs_info, | |
908 | end_io_work); | |
909 | #endif | |
910 | unsigned long flags; | |
911 | struct end_io_wq *end_io_wq; | |
912 | struct bio *bio; | |
913 | struct list_head *next; | |
914 | int error; | |
915 | int was_empty; | |
916 | ||
917 | while(1) { | |
918 | spin_lock_irqsave(&fs_info->end_io_work_lock, flags); | |
919 | if (list_empty(&fs_info->end_io_work_list)) { | |
920 | spin_unlock_irqrestore(&fs_info->end_io_work_lock, | |
921 | flags); | |
922 | return; | |
923 | } | |
924 | next = fs_info->end_io_work_list.next; | |
925 | list_del(next); | |
926 | spin_unlock_irqrestore(&fs_info->end_io_work_lock, flags); | |
927 | ||
928 | end_io_wq = list_entry(next, struct end_io_wq, list); | |
929 | ||
930 | bio = end_io_wq->bio; | |
22c59948 | 931 | if (end_io_wq->metadata && !bio_ready_for_csum(bio)) { |
ce9adaa5 CM |
932 | spin_lock_irqsave(&fs_info->end_io_work_lock, flags); |
933 | was_empty = list_empty(&fs_info->end_io_work_list); | |
934 | list_add_tail(&end_io_wq->list, | |
935 | &fs_info->end_io_work_list); | |
936 | spin_unlock_irqrestore(&fs_info->end_io_work_lock, | |
937 | flags); | |
938 | if (was_empty) | |
939 | return; | |
940 | continue; | |
941 | } | |
942 | error = end_io_wq->error; | |
943 | bio->bi_private = end_io_wq->private; | |
944 | bio->bi_end_io = end_io_wq->end_io; | |
945 | kfree(end_io_wq); | |
946 | bio_endio(bio, error); | |
947 | } | |
948 | } | |
949 | ||
950 | ||
8a4b83cc CM |
951 | struct btrfs_root *open_ctree(struct super_block *sb, |
952 | struct btrfs_fs_devices *fs_devices) | |
2e635a27 | 953 | { |
db94535d CM |
954 | u32 sectorsize; |
955 | u32 nodesize; | |
956 | u32 leafsize; | |
957 | u32 blocksize; | |
87ee04eb | 958 | u32 stripesize; |
e20d96d6 CM |
959 | struct btrfs_root *extent_root = kmalloc(sizeof(struct btrfs_root), |
960 | GFP_NOFS); | |
961 | struct btrfs_root *tree_root = kmalloc(sizeof(struct btrfs_root), | |
962 | GFP_NOFS); | |
8790d502 | 963 | struct btrfs_fs_info *fs_info = kzalloc(sizeof(*fs_info), |
e20d96d6 | 964 | GFP_NOFS); |
0b86a832 CM |
965 | struct btrfs_root *chunk_root = kmalloc(sizeof(struct btrfs_root), |
966 | GFP_NOFS); | |
967 | struct btrfs_root *dev_root = kmalloc(sizeof(struct btrfs_root), | |
968 | GFP_NOFS); | |
eb60ceac | 969 | int ret; |
e58ca020 | 970 | int err = -EINVAL; |
2c90e5d6 | 971 | struct btrfs_super_block *disk_super; |
8790d502 | 972 | |
39279cc3 CM |
973 | if (!extent_root || !tree_root || !fs_info) { |
974 | err = -ENOMEM; | |
975 | goto fail; | |
976 | } | |
ce9adaa5 CM |
977 | end_io_workqueue = create_workqueue("btrfs-end-io"); |
978 | BUG_ON(!end_io_workqueue); | |
979 | ||
0f7d52f4 | 980 | INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_NOFS); |
8fd17795 | 981 | INIT_LIST_HEAD(&fs_info->trans_list); |
facda1e7 | 982 | INIT_LIST_HEAD(&fs_info->dead_roots); |
19c00ddc | 983 | INIT_LIST_HEAD(&fs_info->hashers); |
ce9adaa5 | 984 | INIT_LIST_HEAD(&fs_info->end_io_work_list); |
19c00ddc | 985 | spin_lock_init(&fs_info->hash_lock); |
ce9adaa5 | 986 | spin_lock_init(&fs_info->end_io_work_lock); |
1832a6d5 | 987 | spin_lock_init(&fs_info->delalloc_lock); |
cee36a03 | 988 | spin_lock_init(&fs_info->new_trans_lock); |
19c00ddc | 989 | |
58176a96 | 990 | init_completion(&fs_info->kobj_unregister); |
f2984462 | 991 | sb_set_blocksize(sb, BTRFS_SUPER_INFO_SIZE); |
9f5fae2f CM |
992 | fs_info->tree_root = tree_root; |
993 | fs_info->extent_root = extent_root; | |
0b86a832 CM |
994 | fs_info->chunk_root = chunk_root; |
995 | fs_info->dev_root = dev_root; | |
8a4b83cc | 996 | fs_info->fs_devices = fs_devices; |
0b86a832 | 997 | INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); |
6324fbf3 | 998 | INIT_LIST_HEAD(&fs_info->space_info); |
0b86a832 | 999 | btrfs_mapping_init(&fs_info->mapping_tree); |
e20d96d6 | 1000 | fs_info->sb = sb; |
c59f8951 | 1001 | fs_info->max_extent = (u64)-1; |
6f568d35 | 1002 | fs_info->max_inline = 8192 * 1024; |
04160088 | 1003 | setup_bdi(fs_info, &fs_info->bdi); |
d98237b3 CM |
1004 | fs_info->btree_inode = new_inode(sb); |
1005 | fs_info->btree_inode->i_ino = 1; | |
2c90e5d6 | 1006 | fs_info->btree_inode->i_nlink = 1; |
d98237b3 CM |
1007 | fs_info->btree_inode->i_size = sb->s_bdev->bd_inode->i_size; |
1008 | fs_info->btree_inode->i_mapping->a_ops = &btree_aops; | |
04160088 CM |
1009 | fs_info->btree_inode->i_mapping->backing_dev_info = &fs_info->bdi; |
1010 | ||
d1310b2e | 1011 | extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree, |
5f39d397 CM |
1012 | fs_info->btree_inode->i_mapping, |
1013 | GFP_NOFS); | |
d1310b2e CM |
1014 | extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree, |
1015 | GFP_NOFS); | |
1016 | ||
1017 | BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops; | |
0da5468f | 1018 | |
d1310b2e | 1019 | extent_io_tree_init(&fs_info->free_space_cache, |
f510cfec | 1020 | fs_info->btree_inode->i_mapping, GFP_NOFS); |
d1310b2e | 1021 | extent_io_tree_init(&fs_info->block_group_cache, |
96b5179d | 1022 | fs_info->btree_inode->i_mapping, GFP_NOFS); |
d1310b2e | 1023 | extent_io_tree_init(&fs_info->pinned_extents, |
1a5bc167 | 1024 | fs_info->btree_inode->i_mapping, GFP_NOFS); |
d1310b2e | 1025 | extent_io_tree_init(&fs_info->pending_del, |
1a5bc167 | 1026 | fs_info->btree_inode->i_mapping, GFP_NOFS); |
d1310b2e | 1027 | extent_io_tree_init(&fs_info->extent_ins, |
1a5bc167 | 1028 | fs_info->btree_inode->i_mapping, GFP_NOFS); |
e66f709b | 1029 | fs_info->do_barriers = 1; |
e18e4809 | 1030 | |
ce9adaa5 | 1031 | INIT_WORK(&fs_info->end_io_work, btrfs_end_io_csum); |
6da6abae CM |
1032 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18) |
1033 | INIT_WORK(&fs_info->trans_work, btrfs_transaction_cleaner, fs_info); | |
1034 | #else | |
08607c1b | 1035 | INIT_DELAYED_WORK(&fs_info->trans_work, btrfs_transaction_cleaner); |
6da6abae | 1036 | #endif |
0f7d52f4 CM |
1037 | BTRFS_I(fs_info->btree_inode)->root = tree_root; |
1038 | memset(&BTRFS_I(fs_info->btree_inode)->location, 0, | |
1039 | sizeof(struct btrfs_key)); | |
22b0ebda | 1040 | insert_inode_hash(fs_info->btree_inode); |
d98237b3 | 1041 | mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); |
39279cc3 | 1042 | |
79154b1b | 1043 | mutex_init(&fs_info->trans_mutex); |
d561c025 | 1044 | mutex_init(&fs_info->fs_mutex); |
3768f368 | 1045 | |
19c00ddc CM |
1046 | #if 0 |
1047 | ret = add_hasher(fs_info, "crc32c"); | |
1048 | if (ret) { | |
1049 | printk("btrfs: failed hash setup, modprobe cryptomgr?\n"); | |
1050 | err = -ENOMEM; | |
1051 | goto fail_iput; | |
1052 | } | |
1053 | #endif | |
0b86a832 | 1054 | __setup_root(4096, 4096, 4096, 4096, tree_root, |
2c90e5d6 | 1055 | fs_info, BTRFS_ROOT_TREE_OBJECTID); |
7eccb903 | 1056 | |
2c90e5d6 | 1057 | fs_info->sb_buffer = read_tree_block(tree_root, |
db94535d | 1058 | BTRFS_SUPER_INFO_OFFSET, |
0b86a832 | 1059 | 4096); |
d98237b3 | 1060 | |
0f7d52f4 | 1061 | if (!fs_info->sb_buffer) |
39279cc3 | 1062 | goto fail_iput; |
39279cc3 | 1063 | |
5f39d397 CM |
1064 | read_extent_buffer(fs_info->sb_buffer, &fs_info->super_copy, 0, |
1065 | sizeof(fs_info->super_copy)); | |
1066 | ||
1067 | read_extent_buffer(fs_info->sb_buffer, fs_info->fsid, | |
1068 | (unsigned long)btrfs_super_fsid(fs_info->sb_buffer), | |
1069 | BTRFS_FSID_SIZE); | |
0b86a832 | 1070 | |
5f39d397 | 1071 | disk_super = &fs_info->super_copy; |
0f7d52f4 | 1072 | if (!btrfs_super_root(disk_super)) |
39279cc3 | 1073 | goto fail_sb_buffer; |
0f7d52f4 | 1074 | |
8a4b83cc CM |
1075 | if (btrfs_super_num_devices(disk_super) != fs_devices->num_devices) { |
1076 | printk("Btrfs: wanted %llu devices, but found %llu\n", | |
1077 | (unsigned long long)btrfs_super_num_devices(disk_super), | |
1078 | (unsigned long long)fs_devices->num_devices); | |
1079 | goto fail_sb_buffer; | |
1080 | } | |
db94535d CM |
1081 | nodesize = btrfs_super_nodesize(disk_super); |
1082 | leafsize = btrfs_super_leafsize(disk_super); | |
1083 | sectorsize = btrfs_super_sectorsize(disk_super); | |
87ee04eb | 1084 | stripesize = btrfs_super_stripesize(disk_super); |
db94535d CM |
1085 | tree_root->nodesize = nodesize; |
1086 | tree_root->leafsize = leafsize; | |
1087 | tree_root->sectorsize = sectorsize; | |
87ee04eb | 1088 | tree_root->stripesize = stripesize; |
ff79f819 | 1089 | sb_set_blocksize(sb, sectorsize); |
db94535d | 1090 | |
8352d8a4 | 1091 | i_size_write(fs_info->btree_inode, |
db94535d | 1092 | btrfs_super_total_bytes(disk_super)); |
8352d8a4 | 1093 | |
39279cc3 CM |
1094 | if (strncmp((char *)(&disk_super->magic), BTRFS_MAGIC, |
1095 | sizeof(disk_super->magic))) { | |
1096 | printk("btrfs: valid FS not found on %s\n", sb->s_id); | |
1097 | goto fail_sb_buffer; | |
1098 | } | |
19c00ddc | 1099 | |
0b86a832 | 1100 | mutex_lock(&fs_info->fs_mutex); |
0d81ba5d | 1101 | |
0b86a832 CM |
1102 | ret = btrfs_read_sys_array(tree_root); |
1103 | BUG_ON(ret); | |
1104 | ||
1105 | blocksize = btrfs_level_size(tree_root, | |
1106 | btrfs_super_chunk_root_level(disk_super)); | |
1107 | ||
1108 | __setup_root(nodesize, leafsize, sectorsize, stripesize, | |
1109 | chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID); | |
1110 | ||
1111 | chunk_root->node = read_tree_block(chunk_root, | |
1112 | btrfs_super_chunk_root(disk_super), | |
1113 | blocksize); | |
1114 | BUG_ON(!chunk_root->node); | |
1115 | ||
1116 | ret = btrfs_read_chunk_tree(chunk_root); | |
1117 | BUG_ON(ret); | |
1118 | ||
db94535d CM |
1119 | blocksize = btrfs_level_size(tree_root, |
1120 | btrfs_super_root_level(disk_super)); | |
19c00ddc | 1121 | |
0b86a832 | 1122 | |
e20d96d6 | 1123 | tree_root->node = read_tree_block(tree_root, |
db94535d CM |
1124 | btrfs_super_root(disk_super), |
1125 | blocksize); | |
39279cc3 CM |
1126 | if (!tree_root->node) |
1127 | goto fail_sb_buffer; | |
3768f368 | 1128 | |
db94535d CM |
1129 | |
1130 | ret = find_and_setup_root(tree_root, fs_info, | |
e20d96d6 | 1131 | BTRFS_EXTENT_TREE_OBJECTID, extent_root); |
0b86a832 | 1132 | if (ret) |
39279cc3 | 1133 | goto fail_tree_root; |
0b86a832 CM |
1134 | extent_root->track_dirty = 1; |
1135 | ||
1136 | ret = find_and_setup_root(tree_root, fs_info, | |
1137 | BTRFS_DEV_TREE_OBJECTID, dev_root); | |
1138 | dev_root->track_dirty = 1; | |
1139 | ||
1140 | if (ret) | |
1141 | goto fail_extent_root; | |
3768f368 | 1142 | |
9078a3e1 CM |
1143 | btrfs_read_block_groups(extent_root); |
1144 | ||
0f7d52f4 | 1145 | fs_info->generation = btrfs_super_generation(disk_super) + 1; |
d18a2c44 CM |
1146 | fs_info->data_alloc_profile = (u64)-1; |
1147 | fs_info->metadata_alloc_profile = (u64)-1; | |
1148 | fs_info->system_alloc_profile = fs_info->metadata_alloc_profile; | |
1149 | ||
5be6f7f1 | 1150 | mutex_unlock(&fs_info->fs_mutex); |
0f7d52f4 | 1151 | return tree_root; |
39279cc3 | 1152 | |
0b86a832 CM |
1153 | fail_extent_root: |
1154 | free_extent_buffer(extent_root->node); | |
39279cc3 | 1155 | fail_tree_root: |
0b86a832 | 1156 | mutex_unlock(&fs_info->fs_mutex); |
5f39d397 | 1157 | free_extent_buffer(tree_root->node); |
39279cc3 | 1158 | fail_sb_buffer: |
5f39d397 | 1159 | free_extent_buffer(fs_info->sb_buffer); |
2d2ae547 | 1160 | extent_io_tree_empty_lru(&BTRFS_I(fs_info->btree_inode)->io_tree); |
39279cc3 CM |
1161 | fail_iput: |
1162 | iput(fs_info->btree_inode); | |
1163 | fail: | |
8a4b83cc | 1164 | close_all_devices(fs_info); |
39279cc3 CM |
1165 | kfree(extent_root); |
1166 | kfree(tree_root); | |
2d2ae547 | 1167 | bdi_destroy(&fs_info->bdi); |
39279cc3 CM |
1168 | kfree(fs_info); |
1169 | return ERR_PTR(err); | |
eb60ceac CM |
1170 | } |
1171 | ||
f2984462 CM |
1172 | static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate) |
1173 | { | |
1174 | char b[BDEVNAME_SIZE]; | |
1175 | ||
1176 | if (uptodate) { | |
1177 | set_buffer_uptodate(bh); | |
1178 | } else { | |
1179 | if (!buffer_eopnotsupp(bh) && printk_ratelimit()) { | |
1180 | printk(KERN_WARNING "lost page write due to " | |
1181 | "I/O error on %s\n", | |
1182 | bdevname(bh->b_bdev, b)); | |
1183 | } | |
1184 | set_buffer_write_io_error(bh); | |
1185 | clear_buffer_uptodate(bh); | |
1186 | } | |
1187 | unlock_buffer(bh); | |
1188 | put_bh(bh); | |
1189 | } | |
1190 | ||
1191 | int write_all_supers(struct btrfs_root *root) | |
1192 | { | |
1193 | struct list_head *cur; | |
1194 | struct list_head *head = &root->fs_info->fs_devices->devices; | |
1195 | struct btrfs_device *dev; | |
1196 | struct extent_buffer *sb; | |
1197 | struct btrfs_dev_item *dev_item; | |
1198 | struct buffer_head *bh; | |
1199 | int ret; | |
1200 | int do_barriers; | |
1201 | ||
1202 | do_barriers = !btrfs_test_opt(root, NOBARRIER); | |
1203 | ||
1204 | sb = root->fs_info->sb_buffer; | |
1205 | dev_item = (struct btrfs_dev_item *)offsetof(struct btrfs_super_block, | |
1206 | dev_item); | |
1207 | list_for_each(cur, head) { | |
1208 | dev = list_entry(cur, struct btrfs_device, dev_list); | |
1209 | btrfs_set_device_type(sb, dev_item, dev->type); | |
1210 | btrfs_set_device_id(sb, dev_item, dev->devid); | |
1211 | btrfs_set_device_total_bytes(sb, dev_item, dev->total_bytes); | |
1212 | btrfs_set_device_bytes_used(sb, dev_item, dev->bytes_used); | |
1213 | btrfs_set_device_io_align(sb, dev_item, dev->io_align); | |
1214 | btrfs_set_device_io_width(sb, dev_item, dev->io_width); | |
1215 | btrfs_set_device_sector_size(sb, dev_item, dev->sector_size); | |
1216 | write_extent_buffer(sb, dev->uuid, | |
1217 | (unsigned long)btrfs_device_uuid(dev_item), | |
1218 | BTRFS_DEV_UUID_SIZE); | |
1219 | ||
1220 | btrfs_set_header_flag(sb, BTRFS_HEADER_FLAG_WRITTEN); | |
1221 | csum_tree_block(root, sb, 0); | |
1222 | ||
1223 | bh = __getblk(dev->bdev, BTRFS_SUPER_INFO_OFFSET / | |
1224 | root->fs_info->sb->s_blocksize, | |
1225 | BTRFS_SUPER_INFO_SIZE); | |
1226 | ||
1227 | read_extent_buffer(sb, bh->b_data, 0, BTRFS_SUPER_INFO_SIZE); | |
1228 | dev->pending_io = bh; | |
1229 | ||
1230 | get_bh(bh); | |
1231 | set_buffer_uptodate(bh); | |
1232 | lock_buffer(bh); | |
1233 | bh->b_end_io = btrfs_end_buffer_write_sync; | |
1234 | ||
1235 | if (do_barriers && dev->barriers) { | |
1236 | ret = submit_bh(WRITE_BARRIER, bh); | |
1237 | if (ret == -EOPNOTSUPP) { | |
1238 | printk("btrfs: disabling barriers on dev %s\n", | |
1239 | dev->name); | |
1240 | set_buffer_uptodate(bh); | |
1241 | dev->barriers = 0; | |
1242 | get_bh(bh); | |
1243 | lock_buffer(bh); | |
1244 | ret = submit_bh(WRITE, bh); | |
1245 | } | |
1246 | } else { | |
1247 | ret = submit_bh(WRITE, bh); | |
1248 | } | |
1249 | BUG_ON(ret); | |
1250 | } | |
1251 | ||
1252 | list_for_each(cur, head) { | |
1253 | dev = list_entry(cur, struct btrfs_device, dev_list); | |
1254 | BUG_ON(!dev->pending_io); | |
1255 | bh = dev->pending_io; | |
1256 | wait_on_buffer(bh); | |
1257 | if (!buffer_uptodate(dev->pending_io)) { | |
1258 | if (do_barriers && dev->barriers) { | |
1259 | printk("btrfs: disabling barriers on dev %s\n", | |
1260 | dev->name); | |
1261 | set_buffer_uptodate(bh); | |
1262 | get_bh(bh); | |
1263 | lock_buffer(bh); | |
1264 | dev->barriers = 0; | |
1265 | ret = submit_bh(WRITE, bh); | |
1266 | BUG_ON(ret); | |
1267 | wait_on_buffer(bh); | |
1268 | BUG_ON(!buffer_uptodate(bh)); | |
1269 | } else { | |
1270 | BUG(); | |
1271 | } | |
1272 | ||
1273 | } | |
1274 | dev->pending_io = NULL; | |
1275 | brelse(bh); | |
1276 | } | |
1277 | return 0; | |
1278 | } | |
1279 | ||
e089f05c | 1280 | int write_ctree_super(struct btrfs_trans_handle *trans, struct btrfs_root |
79154b1b | 1281 | *root) |
eb60ceac | 1282 | { |
e66f709b | 1283 | int ret; |
5f39d397 | 1284 | |
f2984462 CM |
1285 | ret = write_all_supers(root); |
1286 | #if 0 | |
21ad10cf CM |
1287 | if (!btrfs_test_opt(root, NOBARRIER)) |
1288 | blkdev_issue_flush(sb->s_bdev, NULL); | |
d1310b2e | 1289 | set_extent_buffer_dirty(&BTRFS_I(btree_inode)->io_tree, super); |
5f39d397 CM |
1290 | ret = sync_page_range_nolock(btree_inode, btree_inode->i_mapping, |
1291 | super->start, super->len); | |
21ad10cf CM |
1292 | if (!btrfs_test_opt(root, NOBARRIER)) |
1293 | blkdev_issue_flush(sb->s_bdev, NULL); | |
f2984462 | 1294 | #endif |
5f39d397 | 1295 | return ret; |
cfaa7295 CM |
1296 | } |
1297 | ||
5eda7b5e | 1298 | int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root) |
2619ba1f CM |
1299 | { |
1300 | radix_tree_delete(&fs_info->fs_roots_radix, | |
1301 | (unsigned long)root->root_key.objectid); | |
b99aa6cb CM |
1302 | if (root->in_sysfs) |
1303 | btrfs_sysfs_del_root(root); | |
2619ba1f CM |
1304 | if (root->inode) |
1305 | iput(root->inode); | |
1306 | if (root->node) | |
5f39d397 | 1307 | free_extent_buffer(root->node); |
2619ba1f | 1308 | if (root->commit_root) |
5f39d397 | 1309 | free_extent_buffer(root->commit_root); |
58176a96 JB |
1310 | if (root->name) |
1311 | kfree(root->name); | |
2619ba1f CM |
1312 | kfree(root); |
1313 | return 0; | |
1314 | } | |
1315 | ||
35b7e476 | 1316 | static int del_fs_roots(struct btrfs_fs_info *fs_info) |
0f7d52f4 CM |
1317 | { |
1318 | int ret; | |
1319 | struct btrfs_root *gang[8]; | |
1320 | int i; | |
1321 | ||
1322 | while(1) { | |
1323 | ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, | |
1324 | (void **)gang, 0, | |
1325 | ARRAY_SIZE(gang)); | |
1326 | if (!ret) | |
1327 | break; | |
2619ba1f | 1328 | for (i = 0; i < ret; i++) |
5eda7b5e | 1329 | btrfs_free_fs_root(fs_info, gang[i]); |
0f7d52f4 CM |
1330 | } |
1331 | return 0; | |
1332 | } | |
b4100d64 | 1333 | |
e20d96d6 | 1334 | int close_ctree(struct btrfs_root *root) |
cfaa7295 | 1335 | { |
3768f368 | 1336 | int ret; |
e089f05c | 1337 | struct btrfs_trans_handle *trans; |
0f7d52f4 | 1338 | struct btrfs_fs_info *fs_info = root->fs_info; |
e089f05c | 1339 | |
facda1e7 | 1340 | fs_info->closing = 1; |
08607c1b | 1341 | btrfs_transaction_flush_work(root); |
0f7d52f4 | 1342 | mutex_lock(&fs_info->fs_mutex); |
6702ed49 | 1343 | btrfs_defrag_dirty_roots(root->fs_info); |
79154b1b | 1344 | trans = btrfs_start_transaction(root, 1); |
54aa1f4d | 1345 | ret = btrfs_commit_transaction(trans, root); |
79154b1b CM |
1346 | /* run commit again to drop the original snapshot */ |
1347 | trans = btrfs_start_transaction(root, 1); | |
1348 | btrfs_commit_transaction(trans, root); | |
1349 | ret = btrfs_write_and_wait_transaction(NULL, root); | |
3768f368 | 1350 | BUG_ON(ret); |
79154b1b | 1351 | write_ctree_super(NULL, root); |
0f7d52f4 CM |
1352 | mutex_unlock(&fs_info->fs_mutex); |
1353 | ||
b0c68f8b CM |
1354 | if (fs_info->delalloc_bytes) { |
1355 | printk("btrfs: at unmount delalloc count %Lu\n", | |
1356 | fs_info->delalloc_bytes); | |
1357 | } | |
0f7d52f4 | 1358 | if (fs_info->extent_root->node) |
5f39d397 | 1359 | free_extent_buffer(fs_info->extent_root->node); |
f510cfec | 1360 | |
0f7d52f4 | 1361 | if (fs_info->tree_root->node) |
5f39d397 | 1362 | free_extent_buffer(fs_info->tree_root->node); |
f510cfec | 1363 | |
0b86a832 CM |
1364 | if (root->fs_info->chunk_root->node); |
1365 | free_extent_buffer(root->fs_info->chunk_root->node); | |
1366 | ||
1367 | if (root->fs_info->dev_root->node); | |
1368 | free_extent_buffer(root->fs_info->dev_root->node); | |
1369 | ||
5f39d397 | 1370 | free_extent_buffer(fs_info->sb_buffer); |
7eccb903 | 1371 | |
9078a3e1 | 1372 | btrfs_free_block_groups(root->fs_info); |
0f7d52f4 | 1373 | del_fs_roots(fs_info); |
d10c5f31 CM |
1374 | |
1375 | filemap_write_and_wait(fs_info->btree_inode->i_mapping); | |
1376 | ||
d1310b2e CM |
1377 | extent_io_tree_empty_lru(&fs_info->free_space_cache); |
1378 | extent_io_tree_empty_lru(&fs_info->block_group_cache); | |
1379 | extent_io_tree_empty_lru(&fs_info->pinned_extents); | |
1380 | extent_io_tree_empty_lru(&fs_info->pending_del); | |
1381 | extent_io_tree_empty_lru(&fs_info->extent_ins); | |
1382 | extent_io_tree_empty_lru(&BTRFS_I(fs_info->btree_inode)->io_tree); | |
d10c5f31 | 1383 | |
db94535d | 1384 | truncate_inode_pages(fs_info->btree_inode->i_mapping, 0); |
ce9adaa5 CM |
1385 | flush_workqueue(end_io_workqueue); |
1386 | destroy_workqueue(end_io_workqueue); | |
d10c5f31 | 1387 | |
db94535d | 1388 | iput(fs_info->btree_inode); |
19c00ddc CM |
1389 | #if 0 |
1390 | while(!list_empty(&fs_info->hashers)) { | |
1391 | struct btrfs_hasher *hasher; | |
1392 | hasher = list_entry(fs_info->hashers.next, struct btrfs_hasher, | |
1393 | hashers); | |
1394 | list_del(&hasher->hashers); | |
1395 | crypto_free_hash(&fs_info->hash_tfm); | |
1396 | kfree(hasher); | |
1397 | } | |
1398 | #endif | |
0b86a832 CM |
1399 | close_all_devices(fs_info); |
1400 | btrfs_mapping_tree_free(&fs_info->mapping_tree); | |
04160088 | 1401 | bdi_destroy(&fs_info->bdi); |
0b86a832 | 1402 | |
0f7d52f4 | 1403 | kfree(fs_info->extent_root); |
0f7d52f4 | 1404 | kfree(fs_info->tree_root); |
0b86a832 CM |
1405 | kfree(fs_info->chunk_root); |
1406 | kfree(fs_info->dev_root); | |
eb60ceac CM |
1407 | return 0; |
1408 | } | |
1409 | ||
5f39d397 CM |
1410 | int btrfs_buffer_uptodate(struct extent_buffer *buf) |
1411 | { | |
810191ff | 1412 | struct inode *btree_inode = buf->first_page->mapping->host; |
d1310b2e | 1413 | return extent_buffer_uptodate(&BTRFS_I(btree_inode)->io_tree, buf); |
5f39d397 CM |
1414 | } |
1415 | ||
1416 | int btrfs_set_buffer_uptodate(struct extent_buffer *buf) | |
ccd467d6 | 1417 | { |
810191ff | 1418 | struct inode *btree_inode = buf->first_page->mapping->host; |
d1310b2e | 1419 | return set_extent_buffer_uptodate(&BTRFS_I(btree_inode)->io_tree, |
5f39d397 CM |
1420 | buf); |
1421 | } | |
6702ed49 | 1422 | |
5f39d397 CM |
1423 | void btrfs_mark_buffer_dirty(struct extent_buffer *buf) |
1424 | { | |
810191ff | 1425 | struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; |
5f39d397 CM |
1426 | u64 transid = btrfs_header_generation(buf); |
1427 | struct inode *btree_inode = root->fs_info->btree_inode; | |
6702ed49 | 1428 | |
ccd467d6 CM |
1429 | if (transid != root->fs_info->generation) { |
1430 | printk(KERN_CRIT "transid mismatch buffer %llu, found %Lu running %Lu\n", | |
db94535d | 1431 | (unsigned long long)buf->start, |
ccd467d6 CM |
1432 | transid, root->fs_info->generation); |
1433 | WARN_ON(1); | |
1434 | } | |
d1310b2e | 1435 | set_extent_buffer_dirty(&BTRFS_I(btree_inode)->io_tree, buf); |
eb60ceac CM |
1436 | } |
1437 | ||
e2008b61 CM |
1438 | void btrfs_throttle(struct btrfs_root *root) |
1439 | { | |
55c69072 CM |
1440 | struct backing_dev_info *bdi; |
1441 | ||
1442 | bdi = root->fs_info->sb->s_bdev->bd_inode->i_mapping->backing_dev_info; | |
04005cc7 CM |
1443 | if (root->fs_info->throttles && bdi_write_congested(bdi)) { |
1444 | #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18) | |
55c69072 | 1445 | congestion_wait(WRITE, HZ/20); |
04005cc7 CM |
1446 | #else |
1447 | blk_congestion_wait(WRITE, HZ/20); | |
1448 | #endif | |
1449 | } | |
e2008b61 CM |
1450 | } |
1451 | ||
d3c2fdcf | 1452 | void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr) |
35b7e476 | 1453 | { |
d3c2fdcf | 1454 | balance_dirty_pages_ratelimited_nr( |
d7fc640e | 1455 | root->fs_info->btree_inode->i_mapping, 1); |
35b7e476 | 1456 | } |
6b80053d CM |
1457 | |
1458 | void btrfs_set_buffer_defrag(struct extent_buffer *buf) | |
1459 | { | |
810191ff | 1460 | struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; |
6b80053d | 1461 | struct inode *btree_inode = root->fs_info->btree_inode; |
d1310b2e | 1462 | set_extent_bits(&BTRFS_I(btree_inode)->io_tree, buf->start, |
6b80053d CM |
1463 | buf->start + buf->len - 1, EXTENT_DEFRAG, GFP_NOFS); |
1464 | } | |
1465 | ||
1466 | void btrfs_set_buffer_defrag_done(struct extent_buffer *buf) | |
1467 | { | |
810191ff | 1468 | struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; |
6b80053d | 1469 | struct inode *btree_inode = root->fs_info->btree_inode; |
d1310b2e | 1470 | set_extent_bits(&BTRFS_I(btree_inode)->io_tree, buf->start, |
6b80053d CM |
1471 | buf->start + buf->len - 1, EXTENT_DEFRAG_DONE, |
1472 | GFP_NOFS); | |
1473 | } | |
1474 | ||
1475 | int btrfs_buffer_defrag(struct extent_buffer *buf) | |
1476 | { | |
810191ff | 1477 | struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; |
6b80053d | 1478 | struct inode *btree_inode = root->fs_info->btree_inode; |
d1310b2e | 1479 | return test_range_bit(&BTRFS_I(btree_inode)->io_tree, |
6b80053d CM |
1480 | buf->start, buf->start + buf->len - 1, EXTENT_DEFRAG, 0); |
1481 | } | |
1482 | ||
1483 | int btrfs_buffer_defrag_done(struct extent_buffer *buf) | |
1484 | { | |
810191ff | 1485 | struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; |
6b80053d | 1486 | struct inode *btree_inode = root->fs_info->btree_inode; |
d1310b2e | 1487 | return test_range_bit(&BTRFS_I(btree_inode)->io_tree, |
6b80053d CM |
1488 | buf->start, buf->start + buf->len - 1, |
1489 | EXTENT_DEFRAG_DONE, 0); | |
1490 | } | |
1491 | ||
1492 | int btrfs_clear_buffer_defrag_done(struct extent_buffer *buf) | |
1493 | { | |
810191ff | 1494 | struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; |
6b80053d | 1495 | struct inode *btree_inode = root->fs_info->btree_inode; |
d1310b2e | 1496 | return clear_extent_bits(&BTRFS_I(btree_inode)->io_tree, |
6b80053d CM |
1497 | buf->start, buf->start + buf->len - 1, |
1498 | EXTENT_DEFRAG_DONE, GFP_NOFS); | |
1499 | } | |
1500 | ||
1501 | int btrfs_clear_buffer_defrag(struct extent_buffer *buf) | |
1502 | { | |
810191ff | 1503 | struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; |
6b80053d | 1504 | struct inode *btree_inode = root->fs_info->btree_inode; |
d1310b2e | 1505 | return clear_extent_bits(&BTRFS_I(btree_inode)->io_tree, |
6b80053d CM |
1506 | buf->start, buf->start + buf->len - 1, |
1507 | EXTENT_DEFRAG, GFP_NOFS); | |
1508 | } | |
1509 | ||
1510 | int btrfs_read_buffer(struct extent_buffer *buf) | |
1511 | { | |
810191ff | 1512 | struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; |
ce9adaa5 | 1513 | int ret; |
f188591e | 1514 | ret = btree_read_extent_buffer_pages(root, buf, 0); |
ce9adaa5 CM |
1515 | if (ret == 0) { |
1516 | buf->flags |= EXTENT_UPTODATE; | |
1517 | } | |
1518 | return ret; | |
6b80053d | 1519 | } |
0da5468f | 1520 | |
d1310b2e | 1521 | static struct extent_io_ops btree_extent_io_ops = { |
0da5468f | 1522 | .writepage_io_hook = btree_writepage_io_hook, |
ce9adaa5 | 1523 | .readpage_end_io_hook = btree_readpage_end_io_hook, |
0b86a832 | 1524 | .submit_bio_hook = btree_submit_bio_hook, |
239b14b3 CM |
1525 | /* note we're sharing with inode.c for the merge bio hook */ |
1526 | .merge_bio_hook = btrfs_merge_bio_hook, | |
0da5468f | 1527 | }; |