Commit | Line | Data |
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05fe58fd RK |
1 | /* |
2 | * inode.c - NILFS inode operations. | |
3 | * | |
4 | * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | * | |
20 | * Written by Ryusuke Konishi <ryusuke@osrg.net> | |
21 | * | |
22 | */ | |
23 | ||
24 | #include <linux/buffer_head.h> | |
5a0e3ad6 | 25 | #include <linux/gfp.h> |
05fe58fd | 26 | #include <linux/mpage.h> |
56d7acc7 | 27 | #include <linux/pagemap.h> |
05fe58fd | 28 | #include <linux/writeback.h> |
e2e40f2c | 29 | #include <linux/uio.h> |
05fe58fd | 30 | #include "nilfs.h" |
6fd1e5c9 | 31 | #include "btnode.h" |
05fe58fd RK |
32 | #include "segment.h" |
33 | #include "page.h" | |
34 | #include "mdt.h" | |
35 | #include "cpfile.h" | |
36 | #include "ifile.h" | |
37 | ||
f5974c8f VD |
38 | /** |
39 | * struct nilfs_iget_args - arguments used during comparison between inodes | |
40 | * @ino: inode number | |
41 | * @cno: checkpoint number | |
42 | * @root: pointer on NILFS root object (mounted checkpoint) | |
43 | * @for_gc: inode for GC flag | |
44 | */ | |
0e14a359 RK |
45 | struct nilfs_iget_args { |
46 | u64 ino; | |
47 | __u64 cno; | |
4d8d9293 | 48 | struct nilfs_root *root; |
0e14a359 RK |
49 | int for_gc; |
50 | }; | |
05fe58fd | 51 | |
705304a8 RK |
52 | static int nilfs_iget_test(struct inode *inode, void *opaque); |
53 | ||
be667377 RK |
54 | void nilfs_inode_add_blocks(struct inode *inode, int n) |
55 | { | |
56 | struct nilfs_root *root = NILFS_I(inode)->i_root; | |
57 | ||
58 | inode_add_bytes(inode, (1 << inode->i_blkbits) * n); | |
59 | if (root) | |
e5f7f848 | 60 | atomic64_add(n, &root->blocks_count); |
be667377 RK |
61 | } |
62 | ||
63 | void nilfs_inode_sub_blocks(struct inode *inode, int n) | |
64 | { | |
65 | struct nilfs_root *root = NILFS_I(inode)->i_root; | |
66 | ||
67 | inode_sub_bytes(inode, (1 << inode->i_blkbits) * n); | |
68 | if (root) | |
e5f7f848 | 69 | atomic64_sub(n, &root->blocks_count); |
be667377 RK |
70 | } |
71 | ||
05fe58fd RK |
72 | /** |
73 | * nilfs_get_block() - get a file block on the filesystem (callback function) | |
74 | * @inode - inode struct of the target file | |
75 | * @blkoff - file block number | |
76 | * @bh_result - buffer head to be mapped on | |
77 | * @create - indicate whether allocating the block or not when it has not | |
78 | * been allocated yet. | |
79 | * | |
80 | * This function does not issue actual read request of the specified data | |
81 | * block. It is done by VFS. | |
05fe58fd RK |
82 | */ |
83 | int nilfs_get_block(struct inode *inode, sector_t blkoff, | |
84 | struct buffer_head *bh_result, int create) | |
85 | { | |
86 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
0ef28f9a | 87 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
c3a7abf0 | 88 | __u64 blknum = 0; |
05fe58fd | 89 | int err = 0, ret; |
c3a7abf0 | 90 | unsigned maxblocks = bh_result->b_size >> inode->i_blkbits; |
05fe58fd | 91 | |
0ef28f9a | 92 | down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
c3a7abf0 | 93 | ret = nilfs_bmap_lookup_contig(ii->i_bmap, blkoff, &blknum, maxblocks); |
0ef28f9a | 94 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
c3a7abf0 | 95 | if (ret >= 0) { /* found */ |
05fe58fd | 96 | map_bh(bh_result, inode->i_sb, blknum); |
c3a7abf0 RK |
97 | if (ret > 0) |
98 | bh_result->b_size = (ret << inode->i_blkbits); | |
05fe58fd RK |
99 | goto out; |
100 | } | |
05fe58fd RK |
101 | /* data block was not found */ |
102 | if (ret == -ENOENT && create) { | |
103 | struct nilfs_transaction_info ti; | |
104 | ||
105 | bh_result->b_blocknr = 0; | |
106 | err = nilfs_transaction_begin(inode->i_sb, &ti, 1); | |
107 | if (unlikely(err)) | |
108 | goto out; | |
3568a13f | 109 | err = nilfs_bmap_insert(ii->i_bmap, blkoff, |
05fe58fd | 110 | (unsigned long)bh_result); |
05fe58fd RK |
111 | if (unlikely(err != 0)) { |
112 | if (err == -EEXIST) { | |
113 | /* | |
114 | * The get_block() function could be called | |
115 | * from multiple callers for an inode. | |
116 | * However, the page having this block must | |
117 | * be locked in this case. | |
118 | */ | |
1f5abe7e | 119 | printk(KERN_WARNING |
05fe58fd RK |
120 | "nilfs_get_block: a race condition " |
121 | "while inserting a data block. " | |
122 | "(inode number=%lu, file block " | |
123 | "offset=%llu)\n", | |
124 | inode->i_ino, | |
125 | (unsigned long long)blkoff); | |
1f5abe7e | 126 | err = 0; |
05fe58fd | 127 | } |
47420c79 | 128 | nilfs_transaction_abort(inode->i_sb); |
05fe58fd RK |
129 | goto out; |
130 | } | |
b9f66140 | 131 | nilfs_mark_inode_dirty_sync(inode); |
47420c79 | 132 | nilfs_transaction_commit(inode->i_sb); /* never fails */ |
05fe58fd RK |
133 | /* Error handling should be detailed */ |
134 | set_buffer_new(bh_result); | |
27e6c7a3 | 135 | set_buffer_delay(bh_result); |
05fe58fd RK |
136 | map_bh(bh_result, inode->i_sb, 0); /* dbn must be changed |
137 | to proper value */ | |
138 | } else if (ret == -ENOENT) { | |
139 | /* not found is not error (e.g. hole); must return without | |
140 | the mapped state flag. */ | |
141 | ; | |
142 | } else { | |
143 | err = ret; | |
144 | } | |
145 | ||
146 | out: | |
147 | return err; | |
148 | } | |
149 | ||
150 | /** | |
151 | * nilfs_readpage() - implement readpage() method of nilfs_aops {} | |
152 | * address_space_operations. | |
153 | * @file - file struct of the file to be read | |
154 | * @page - the page to be read | |
155 | */ | |
156 | static int nilfs_readpage(struct file *file, struct page *page) | |
157 | { | |
158 | return mpage_readpage(page, nilfs_get_block); | |
159 | } | |
160 | ||
161 | /** | |
162 | * nilfs_readpages() - implement readpages() method of nilfs_aops {} | |
163 | * address_space_operations. | |
164 | * @file - file struct of the file to be read | |
165 | * @mapping - address_space struct used for reading multiple pages | |
166 | * @pages - the pages to be read | |
167 | * @nr_pages - number of pages to be read | |
168 | */ | |
169 | static int nilfs_readpages(struct file *file, struct address_space *mapping, | |
170 | struct list_head *pages, unsigned nr_pages) | |
171 | { | |
172 | return mpage_readpages(mapping, pages, nr_pages, nilfs_get_block); | |
173 | } | |
174 | ||
175 | static int nilfs_writepages(struct address_space *mapping, | |
176 | struct writeback_control *wbc) | |
177 | { | |
f30bf3e4 RK |
178 | struct inode *inode = mapping->host; |
179 | int err = 0; | |
180 | ||
8c26c4e2 VD |
181 | if (inode->i_sb->s_flags & MS_RDONLY) { |
182 | nilfs_clear_dirty_pages(mapping, false); | |
183 | return -EROFS; | |
184 | } | |
185 | ||
f30bf3e4 RK |
186 | if (wbc->sync_mode == WB_SYNC_ALL) |
187 | err = nilfs_construct_dsync_segment(inode->i_sb, inode, | |
188 | wbc->range_start, | |
189 | wbc->range_end); | |
190 | return err; | |
05fe58fd RK |
191 | } |
192 | ||
193 | static int nilfs_writepage(struct page *page, struct writeback_control *wbc) | |
194 | { | |
195 | struct inode *inode = page->mapping->host; | |
196 | int err; | |
197 | ||
eb53b6db | 198 | if (inode->i_sb->s_flags & MS_RDONLY) { |
8c26c4e2 VD |
199 | /* |
200 | * It means that filesystem was remounted in read-only | |
201 | * mode because of error or metadata corruption. But we | |
202 | * have dirty pages that try to be flushed in background. | |
203 | * So, here we simply discard this dirty page. | |
204 | */ | |
205 | nilfs_clear_dirty_page(page, false); | |
206 | unlock_page(page); | |
207 | return -EROFS; | |
208 | } | |
209 | ||
05fe58fd RK |
210 | redirty_page_for_writepage(wbc, page); |
211 | unlock_page(page); | |
212 | ||
213 | if (wbc->sync_mode == WB_SYNC_ALL) { | |
214 | err = nilfs_construct_segment(inode->i_sb); | |
215 | if (unlikely(err)) | |
216 | return err; | |
217 | } else if (wbc->for_reclaim) | |
218 | nilfs_flush_segment(inode->i_sb, inode->i_ino); | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
223 | static int nilfs_set_page_dirty(struct page *page) | |
224 | { | |
56d7acc7 | 225 | struct inode *inode = page->mapping->host; |
136e8770 | 226 | int ret = __set_page_dirty_nobuffers(page); |
05fe58fd | 227 | |
136e8770 | 228 | if (page_has_buffers(page)) { |
136e8770 RK |
229 | unsigned nr_dirty = 0; |
230 | struct buffer_head *bh, *head; | |
05fe58fd | 231 | |
136e8770 RK |
232 | /* |
233 | * This page is locked by callers, and no other thread | |
234 | * concurrently marks its buffers dirty since they are | |
235 | * only dirtied through routines in fs/buffer.c in | |
236 | * which call sites of mark_buffer_dirty are protected | |
237 | * by page lock. | |
238 | */ | |
239 | bh = head = page_buffers(page); | |
240 | do { | |
241 | /* Do not mark hole blocks dirty */ | |
242 | if (buffer_dirty(bh) || !buffer_mapped(bh)) | |
243 | continue; | |
244 | ||
245 | set_buffer_dirty(bh); | |
246 | nr_dirty++; | |
247 | } while (bh = bh->b_this_page, bh != head); | |
248 | ||
249 | if (nr_dirty) | |
250 | nilfs_set_file_dirty(inode, nr_dirty); | |
56d7acc7 AR |
251 | } else if (ret) { |
252 | unsigned nr_dirty = 1 << (PAGE_CACHE_SHIFT - inode->i_blkbits); | |
253 | ||
254 | nilfs_set_file_dirty(inode, nr_dirty); | |
05fe58fd RK |
255 | } |
256 | return ret; | |
257 | } | |
258 | ||
2d1b399b MS |
259 | void nilfs_write_failed(struct address_space *mapping, loff_t to) |
260 | { | |
261 | struct inode *inode = mapping->host; | |
262 | ||
263 | if (to > inode->i_size) { | |
7caef267 | 264 | truncate_pagecache(inode, inode->i_size); |
2d1b399b MS |
265 | nilfs_truncate(inode); |
266 | } | |
267 | } | |
268 | ||
05fe58fd RK |
269 | static int nilfs_write_begin(struct file *file, struct address_space *mapping, |
270 | loff_t pos, unsigned len, unsigned flags, | |
271 | struct page **pagep, void **fsdata) | |
272 | ||
273 | { | |
274 | struct inode *inode = mapping->host; | |
275 | int err = nilfs_transaction_begin(inode->i_sb, NULL, 1); | |
276 | ||
277 | if (unlikely(err)) | |
278 | return err; | |
279 | ||
155130a4 CH |
280 | err = block_write_begin(mapping, pos, len, flags, pagep, |
281 | nilfs_get_block); | |
282 | if (unlikely(err)) { | |
2d1b399b | 283 | nilfs_write_failed(mapping, pos + len); |
47420c79 | 284 | nilfs_transaction_abort(inode->i_sb); |
155130a4 | 285 | } |
05fe58fd RK |
286 | return err; |
287 | } | |
288 | ||
289 | static int nilfs_write_end(struct file *file, struct address_space *mapping, | |
290 | loff_t pos, unsigned len, unsigned copied, | |
291 | struct page *page, void *fsdata) | |
292 | { | |
293 | struct inode *inode = mapping->host; | |
294 | unsigned start = pos & (PAGE_CACHE_SIZE - 1); | |
295 | unsigned nr_dirty; | |
296 | int err; | |
297 | ||
298 | nr_dirty = nilfs_page_count_clean_buffers(page, start, | |
299 | start + copied); | |
300 | copied = generic_write_end(file, mapping, pos, len, copied, page, | |
301 | fsdata); | |
bcbc8c64 | 302 | nilfs_set_file_dirty(inode, nr_dirty); |
47420c79 | 303 | err = nilfs_transaction_commit(inode->i_sb); |
05fe58fd RK |
304 | return err ? : copied; |
305 | } | |
306 | ||
307 | static ssize_t | |
22c6186e | 308 | nilfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter, loff_t offset) |
05fe58fd RK |
309 | { |
310 | struct file *file = iocb->ki_filp; | |
2d1b399b | 311 | struct address_space *mapping = file->f_mapping; |
05fe58fd | 312 | struct inode *inode = file->f_mapping->host; |
a6cbcd4a | 313 | size_t count = iov_iter_count(iter); |
05fe58fd | 314 | ssize_t size; |
05fe58fd | 315 | |
6f673763 | 316 | if (iov_iter_rw(iter) == WRITE) |
05fe58fd RK |
317 | return 0; |
318 | ||
319 | /* Needs synchronization with the cleaner */ | |
17f8c842 | 320 | size = blockdev_direct_IO(iocb, inode, iter, offset, nilfs_get_block); |
eafdc7d1 CH |
321 | |
322 | /* | |
323 | * In case of error extending write may have instantiated a few | |
324 | * blocks outside i_size. Trim these off again. | |
325 | */ | |
6f673763 | 326 | if (unlikely(iov_iter_rw(iter) == WRITE && size < 0)) { |
eafdc7d1 | 327 | loff_t isize = i_size_read(inode); |
a6cbcd4a | 328 | loff_t end = offset + count; |
eafdc7d1 CH |
329 | |
330 | if (end > isize) | |
2d1b399b | 331 | nilfs_write_failed(mapping, end); |
eafdc7d1 CH |
332 | } |
333 | ||
05fe58fd RK |
334 | return size; |
335 | } | |
336 | ||
7f09410b | 337 | const struct address_space_operations nilfs_aops = { |
05fe58fd RK |
338 | .writepage = nilfs_writepage, |
339 | .readpage = nilfs_readpage, | |
05fe58fd RK |
340 | .writepages = nilfs_writepages, |
341 | .set_page_dirty = nilfs_set_page_dirty, | |
342 | .readpages = nilfs_readpages, | |
343 | .write_begin = nilfs_write_begin, | |
344 | .write_end = nilfs_write_end, | |
345 | /* .releasepage = nilfs_releasepage, */ | |
346 | .invalidatepage = block_invalidatepage, | |
347 | .direct_IO = nilfs_direct_IO, | |
258ef67e | 348 | .is_partially_uptodate = block_is_partially_uptodate, |
05fe58fd RK |
349 | }; |
350 | ||
705304a8 RK |
351 | static int nilfs_insert_inode_locked(struct inode *inode, |
352 | struct nilfs_root *root, | |
353 | unsigned long ino) | |
354 | { | |
355 | struct nilfs_iget_args args = { | |
356 | .ino = ino, .root = root, .cno = 0, .for_gc = 0 | |
357 | }; | |
358 | ||
359 | return insert_inode_locked4(inode, ino, nilfs_iget_test, &args); | |
360 | } | |
361 | ||
c6e49e3f | 362 | struct inode *nilfs_new_inode(struct inode *dir, umode_t mode) |
05fe58fd RK |
363 | { |
364 | struct super_block *sb = dir->i_sb; | |
e3154e97 | 365 | struct the_nilfs *nilfs = sb->s_fs_info; |
05fe58fd RK |
366 | struct inode *inode; |
367 | struct nilfs_inode_info *ii; | |
4d8d9293 | 368 | struct nilfs_root *root; |
05fe58fd RK |
369 | int err = -ENOMEM; |
370 | ino_t ino; | |
371 | ||
372 | inode = new_inode(sb); | |
373 | if (unlikely(!inode)) | |
374 | goto failed; | |
375 | ||
376 | mapping_set_gfp_mask(inode->i_mapping, | |
377 | mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS); | |
378 | ||
4d8d9293 | 379 | root = NILFS_I(dir)->i_root; |
05fe58fd RK |
380 | ii = NILFS_I(inode); |
381 | ii->i_state = 1 << NILFS_I_NEW; | |
4d8d9293 | 382 | ii->i_root = root; |
05fe58fd | 383 | |
e912a5b6 | 384 | err = nilfs_ifile_create_inode(root->ifile, &ino, &ii->i_bh); |
05fe58fd RK |
385 | if (unlikely(err)) |
386 | goto failed_ifile_create_inode; | |
387 | /* reference count of i_bh inherits from nilfs_mdt_read_block() */ | |
388 | ||
e5f7f848 | 389 | atomic64_inc(&root->inodes_count); |
73459dcc | 390 | inode_init_owner(inode, dir, mode); |
05fe58fd RK |
391 | inode->i_ino = ino; |
392 | inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; | |
393 | ||
394 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) { | |
395 | err = nilfs_bmap_read(ii->i_bmap, NULL); | |
396 | if (err < 0) | |
705304a8 | 397 | goto failed_after_creation; |
05fe58fd RK |
398 | |
399 | set_bit(NILFS_I_BMAP, &ii->i_state); | |
400 | /* No lock is needed; iget() ensures it. */ | |
401 | } | |
402 | ||
b253a3e4 RK |
403 | ii->i_flags = nilfs_mask_flags( |
404 | mode, NILFS_I(dir)->i_flags & NILFS_FL_INHERITED); | |
05fe58fd RK |
405 | |
406 | /* ii->i_file_acl = 0; */ | |
407 | /* ii->i_dir_acl = 0; */ | |
05fe58fd | 408 | ii->i_dir_start_lookup = 0; |
05fe58fd | 409 | nilfs_set_inode_flags(inode); |
9b1fc4e4 RK |
410 | spin_lock(&nilfs->ns_next_gen_lock); |
411 | inode->i_generation = nilfs->ns_next_generation++; | |
412 | spin_unlock(&nilfs->ns_next_gen_lock); | |
705304a8 RK |
413 | if (nilfs_insert_inode_locked(inode, root, ino) < 0) { |
414 | err = -EIO; | |
415 | goto failed_after_creation; | |
416 | } | |
05fe58fd RK |
417 | |
418 | err = nilfs_init_acl(inode, dir); | |
419 | if (unlikely(err)) | |
705304a8 | 420 | goto failed_after_creation; /* never occur. When supporting |
05fe58fd RK |
421 | nilfs_init_acl(), proper cancellation of |
422 | above jobs should be considered */ | |
423 | ||
05fe58fd RK |
424 | return inode; |
425 | ||
705304a8 | 426 | failed_after_creation: |
6d6b77f1 | 427 | clear_nlink(inode); |
705304a8 | 428 | unlock_new_inode(inode); |
05fe58fd | 429 | iput(inode); /* raw_inode will be deleted through |
705304a8 | 430 | nilfs_evict_inode() */ |
05fe58fd RK |
431 | goto failed; |
432 | ||
433 | failed_ifile_create_inode: | |
434 | make_bad_inode(inode); | |
435 | iput(inode); /* if i_nlink == 1, generic_forget_inode() will be | |
436 | called */ | |
437 | failed: | |
438 | return ERR_PTR(err); | |
439 | } | |
440 | ||
05fe58fd RK |
441 | void nilfs_set_inode_flags(struct inode *inode) |
442 | { | |
443 | unsigned int flags = NILFS_I(inode)->i_flags; | |
faea2c53 | 444 | unsigned int new_fl = 0; |
05fe58fd | 445 | |
f0c9f242 | 446 | if (flags & FS_SYNC_FL) |
faea2c53 | 447 | new_fl |= S_SYNC; |
f0c9f242 | 448 | if (flags & FS_APPEND_FL) |
faea2c53 | 449 | new_fl |= S_APPEND; |
f0c9f242 | 450 | if (flags & FS_IMMUTABLE_FL) |
faea2c53 | 451 | new_fl |= S_IMMUTABLE; |
f0c9f242 | 452 | if (flags & FS_NOATIME_FL) |
faea2c53 | 453 | new_fl |= S_NOATIME; |
f0c9f242 | 454 | if (flags & FS_DIRSYNC_FL) |
faea2c53 RK |
455 | new_fl |= S_DIRSYNC; |
456 | inode_set_flags(inode, new_fl, S_SYNC | S_APPEND | S_IMMUTABLE | | |
457 | S_NOATIME | S_DIRSYNC); | |
05fe58fd RK |
458 | } |
459 | ||
460 | int nilfs_read_inode_common(struct inode *inode, | |
461 | struct nilfs_inode *raw_inode) | |
462 | { | |
463 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
464 | int err; | |
465 | ||
466 | inode->i_mode = le16_to_cpu(raw_inode->i_mode); | |
305d3d0d EB |
467 | i_uid_write(inode, le32_to_cpu(raw_inode->i_uid)); |
468 | i_gid_write(inode, le32_to_cpu(raw_inode->i_gid)); | |
bfe86848 | 469 | set_nlink(inode, le16_to_cpu(raw_inode->i_links_count)); |
05fe58fd RK |
470 | inode->i_size = le64_to_cpu(raw_inode->i_size); |
471 | inode->i_atime.tv_sec = le64_to_cpu(raw_inode->i_mtime); | |
472 | inode->i_ctime.tv_sec = le64_to_cpu(raw_inode->i_ctime); | |
473 | inode->i_mtime.tv_sec = le64_to_cpu(raw_inode->i_mtime); | |
61239230 RK |
474 | inode->i_atime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec); |
475 | inode->i_ctime.tv_nsec = le32_to_cpu(raw_inode->i_ctime_nsec); | |
476 | inode->i_mtime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec); | |
705304a8 RK |
477 | if (inode->i_nlink == 0) |
478 | return -ESTALE; /* this inode is deleted */ | |
05fe58fd RK |
479 | |
480 | inode->i_blocks = le64_to_cpu(raw_inode->i_blocks); | |
481 | ii->i_flags = le32_to_cpu(raw_inode->i_flags); | |
482 | #if 0 | |
483 | ii->i_file_acl = le32_to_cpu(raw_inode->i_file_acl); | |
484 | ii->i_dir_acl = S_ISREG(inode->i_mode) ? | |
485 | 0 : le32_to_cpu(raw_inode->i_dir_acl); | |
486 | #endif | |
3cc811bf | 487 | ii->i_dir_start_lookup = 0; |
05fe58fd RK |
488 | inode->i_generation = le32_to_cpu(raw_inode->i_generation); |
489 | ||
490 | if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
491 | S_ISLNK(inode->i_mode)) { | |
492 | err = nilfs_bmap_read(ii->i_bmap, raw_inode); | |
493 | if (err < 0) | |
494 | return err; | |
495 | set_bit(NILFS_I_BMAP, &ii->i_state); | |
496 | /* No lock is needed; iget() ensures it. */ | |
497 | } | |
498 | return 0; | |
499 | } | |
500 | ||
e912a5b6 RK |
501 | static int __nilfs_read_inode(struct super_block *sb, |
502 | struct nilfs_root *root, unsigned long ino, | |
05fe58fd RK |
503 | struct inode *inode) |
504 | { | |
e3154e97 | 505 | struct the_nilfs *nilfs = sb->s_fs_info; |
05fe58fd RK |
506 | struct buffer_head *bh; |
507 | struct nilfs_inode *raw_inode; | |
508 | int err; | |
509 | ||
365e215c | 510 | down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
e912a5b6 | 511 | err = nilfs_ifile_get_inode_block(root->ifile, ino, &bh); |
05fe58fd RK |
512 | if (unlikely(err)) |
513 | goto bad_inode; | |
514 | ||
e912a5b6 | 515 | raw_inode = nilfs_ifile_map_inode(root->ifile, ino, bh); |
05fe58fd | 516 | |
1b2f5a64 RK |
517 | err = nilfs_read_inode_common(inode, raw_inode); |
518 | if (err) | |
05fe58fd RK |
519 | goto failed_unmap; |
520 | ||
521 | if (S_ISREG(inode->i_mode)) { | |
522 | inode->i_op = &nilfs_file_inode_operations; | |
523 | inode->i_fop = &nilfs_file_operations; | |
524 | inode->i_mapping->a_ops = &nilfs_aops; | |
05fe58fd RK |
525 | } else if (S_ISDIR(inode->i_mode)) { |
526 | inode->i_op = &nilfs_dir_inode_operations; | |
527 | inode->i_fop = &nilfs_dir_operations; | |
528 | inode->i_mapping->a_ops = &nilfs_aops; | |
529 | } else if (S_ISLNK(inode->i_mode)) { | |
530 | inode->i_op = &nilfs_symlink_inode_operations; | |
531 | inode->i_mapping->a_ops = &nilfs_aops; | |
532 | } else { | |
533 | inode->i_op = &nilfs_special_inode_operations; | |
534 | init_special_inode( | |
535 | inode, inode->i_mode, | |
cdce214e | 536 | huge_decode_dev(le64_to_cpu(raw_inode->i_device_code))); |
05fe58fd | 537 | } |
e912a5b6 | 538 | nilfs_ifile_unmap_inode(root->ifile, ino, bh); |
05fe58fd | 539 | brelse(bh); |
365e215c | 540 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
05fe58fd | 541 | nilfs_set_inode_flags(inode); |
0ce187c4 RK |
542 | mapping_set_gfp_mask(inode->i_mapping, |
543 | mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS); | |
05fe58fd RK |
544 | return 0; |
545 | ||
546 | failed_unmap: | |
e912a5b6 | 547 | nilfs_ifile_unmap_inode(root->ifile, ino, bh); |
05fe58fd RK |
548 | brelse(bh); |
549 | ||
550 | bad_inode: | |
365e215c | 551 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
05fe58fd RK |
552 | return err; |
553 | } | |
554 | ||
0e14a359 RK |
555 | static int nilfs_iget_test(struct inode *inode, void *opaque) |
556 | { | |
557 | struct nilfs_iget_args *args = opaque; | |
558 | struct nilfs_inode_info *ii; | |
559 | ||
4d8d9293 | 560 | if (args->ino != inode->i_ino || args->root != NILFS_I(inode)->i_root) |
0e14a359 RK |
561 | return 0; |
562 | ||
563 | ii = NILFS_I(inode); | |
564 | if (!test_bit(NILFS_I_GCINODE, &ii->i_state)) | |
565 | return !args->for_gc; | |
566 | ||
567 | return args->for_gc && args->cno == ii->i_cno; | |
568 | } | |
569 | ||
570 | static int nilfs_iget_set(struct inode *inode, void *opaque) | |
571 | { | |
572 | struct nilfs_iget_args *args = opaque; | |
573 | ||
574 | inode->i_ino = args->ino; | |
575 | if (args->for_gc) { | |
576 | NILFS_I(inode)->i_state = 1 << NILFS_I_GCINODE; | |
577 | NILFS_I(inode)->i_cno = args->cno; | |
4d8d9293 RK |
578 | NILFS_I(inode)->i_root = NULL; |
579 | } else { | |
580 | if (args->root && args->ino == NILFS_ROOT_INO) | |
581 | nilfs_get_root(args->root); | |
582 | NILFS_I(inode)->i_root = args->root; | |
0e14a359 RK |
583 | } |
584 | return 0; | |
585 | } | |
586 | ||
032dbb3b RK |
587 | struct inode *nilfs_ilookup(struct super_block *sb, struct nilfs_root *root, |
588 | unsigned long ino) | |
589 | { | |
590 | struct nilfs_iget_args args = { | |
591 | .ino = ino, .root = root, .cno = 0, .for_gc = 0 | |
592 | }; | |
593 | ||
594 | return ilookup5(sb, ino, nilfs_iget_test, &args); | |
595 | } | |
596 | ||
f1e89c86 RK |
597 | struct inode *nilfs_iget_locked(struct super_block *sb, struct nilfs_root *root, |
598 | unsigned long ino) | |
05fe58fd | 599 | { |
4d8d9293 RK |
600 | struct nilfs_iget_args args = { |
601 | .ino = ino, .root = root, .cno = 0, .for_gc = 0 | |
602 | }; | |
f1e89c86 RK |
603 | |
604 | return iget5_locked(sb, ino, nilfs_iget_test, nilfs_iget_set, &args); | |
605 | } | |
606 | ||
607 | struct inode *nilfs_iget(struct super_block *sb, struct nilfs_root *root, | |
608 | unsigned long ino) | |
609 | { | |
05fe58fd RK |
610 | struct inode *inode; |
611 | int err; | |
612 | ||
f1e89c86 | 613 | inode = nilfs_iget_locked(sb, root, ino); |
05fe58fd RK |
614 | if (unlikely(!inode)) |
615 | return ERR_PTR(-ENOMEM); | |
616 | if (!(inode->i_state & I_NEW)) | |
617 | return inode; | |
618 | ||
e912a5b6 | 619 | err = __nilfs_read_inode(sb, root, ino, inode); |
05fe58fd RK |
620 | if (unlikely(err)) { |
621 | iget_failed(inode); | |
622 | return ERR_PTR(err); | |
623 | } | |
624 | unlock_new_inode(inode); | |
625 | return inode; | |
626 | } | |
627 | ||
263d90ce RK |
628 | struct inode *nilfs_iget_for_gc(struct super_block *sb, unsigned long ino, |
629 | __u64 cno) | |
630 | { | |
4d8d9293 RK |
631 | struct nilfs_iget_args args = { |
632 | .ino = ino, .root = NULL, .cno = cno, .for_gc = 1 | |
633 | }; | |
263d90ce RK |
634 | struct inode *inode; |
635 | int err; | |
636 | ||
637 | inode = iget5_locked(sb, ino, nilfs_iget_test, nilfs_iget_set, &args); | |
638 | if (unlikely(!inode)) | |
639 | return ERR_PTR(-ENOMEM); | |
640 | if (!(inode->i_state & I_NEW)) | |
641 | return inode; | |
642 | ||
643 | err = nilfs_init_gcinode(inode); | |
644 | if (unlikely(err)) { | |
645 | iget_failed(inode); | |
646 | return ERR_PTR(err); | |
647 | } | |
648 | unlock_new_inode(inode); | |
649 | return inode; | |
650 | } | |
651 | ||
05fe58fd RK |
652 | void nilfs_write_inode_common(struct inode *inode, |
653 | struct nilfs_inode *raw_inode, int has_bmap) | |
654 | { | |
655 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
656 | ||
657 | raw_inode->i_mode = cpu_to_le16(inode->i_mode); | |
305d3d0d EB |
658 | raw_inode->i_uid = cpu_to_le32(i_uid_read(inode)); |
659 | raw_inode->i_gid = cpu_to_le32(i_gid_read(inode)); | |
05fe58fd RK |
660 | raw_inode->i_links_count = cpu_to_le16(inode->i_nlink); |
661 | raw_inode->i_size = cpu_to_le64(inode->i_size); | |
662 | raw_inode->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
663 | raw_inode->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec); | |
61239230 RK |
664 | raw_inode->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); |
665 | raw_inode->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec); | |
05fe58fd RK |
666 | raw_inode->i_blocks = cpu_to_le64(inode->i_blocks); |
667 | ||
05fe58fd RK |
668 | raw_inode->i_flags = cpu_to_le32(ii->i_flags); |
669 | raw_inode->i_generation = cpu_to_le32(inode->i_generation); | |
670 | ||
56eb5538 RK |
671 | if (NILFS_ROOT_METADATA_FILE(inode->i_ino)) { |
672 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; | |
673 | ||
674 | /* zero-fill unused portion in the case of super root block */ | |
675 | raw_inode->i_xattr = 0; | |
676 | raw_inode->i_pad = 0; | |
677 | memset((void *)raw_inode + sizeof(*raw_inode), 0, | |
678 | nilfs->ns_inode_size - sizeof(*raw_inode)); | |
679 | } | |
680 | ||
05fe58fd RK |
681 | if (has_bmap) |
682 | nilfs_bmap_write(ii->i_bmap, raw_inode); | |
683 | else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) | |
684 | raw_inode->i_device_code = | |
cdce214e | 685 | cpu_to_le64(huge_encode_dev(inode->i_rdev)); |
05fe58fd RK |
686 | /* When extending inode, nilfs->ns_inode_size should be checked |
687 | for substitutions of appended fields */ | |
688 | } | |
689 | ||
b9f66140 | 690 | void nilfs_update_inode(struct inode *inode, struct buffer_head *ibh, int flags) |
05fe58fd RK |
691 | { |
692 | ino_t ino = inode->i_ino; | |
693 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
e912a5b6 | 694 | struct inode *ifile = ii->i_root->ifile; |
05fe58fd RK |
695 | struct nilfs_inode *raw_inode; |
696 | ||
e912a5b6 | 697 | raw_inode = nilfs_ifile_map_inode(ifile, ino, ibh); |
05fe58fd | 698 | |
05fe58fd | 699 | if (test_and_clear_bit(NILFS_I_NEW, &ii->i_state)) |
e912a5b6 | 700 | memset(raw_inode, 0, NILFS_MDT(ifile)->mi_entry_size); |
b9f66140 AR |
701 | if (flags & I_DIRTY_DATASYNC) |
702 | set_bit(NILFS_I_INODE_SYNC, &ii->i_state); | |
05fe58fd RK |
703 | |
704 | nilfs_write_inode_common(inode, raw_inode, 0); | |
705 | /* XXX: call with has_bmap = 0 is a workaround to avoid | |
706 | deadlock of bmap. This delays update of i_bmap to just | |
707 | before writing */ | |
e912a5b6 | 708 | nilfs_ifile_unmap_inode(ifile, ino, ibh); |
05fe58fd RK |
709 | } |
710 | ||
711 | #define NILFS_MAX_TRUNCATE_BLOCKS 16384 /* 64MB for 4KB block */ | |
712 | ||
713 | static void nilfs_truncate_bmap(struct nilfs_inode_info *ii, | |
714 | unsigned long from) | |
715 | { | |
3568a13f | 716 | __u64 b; |
05fe58fd RK |
717 | int ret; |
718 | ||
719 | if (!test_bit(NILFS_I_BMAP, &ii->i_state)) | |
720 | return; | |
e828949e | 721 | repeat: |
05fe58fd RK |
722 | ret = nilfs_bmap_last_key(ii->i_bmap, &b); |
723 | if (ret == -ENOENT) | |
724 | return; | |
725 | else if (ret < 0) | |
726 | goto failed; | |
727 | ||
728 | if (b < from) | |
729 | return; | |
730 | ||
3568a13f | 731 | b -= min_t(__u64, NILFS_MAX_TRUNCATE_BLOCKS, b - from); |
05fe58fd RK |
732 | ret = nilfs_bmap_truncate(ii->i_bmap, b); |
733 | nilfs_relax_pressure_in_lock(ii->vfs_inode.i_sb); | |
734 | if (!ret || (ret == -ENOMEM && | |
735 | nilfs_bmap_truncate(ii->i_bmap, b) == 0)) | |
736 | goto repeat; | |
737 | ||
e828949e RK |
738 | failed: |
739 | nilfs_warning(ii->vfs_inode.i_sb, __func__, | |
740 | "failed to truncate bmap (ino=%lu, err=%d)", | |
741 | ii->vfs_inode.i_ino, ret); | |
05fe58fd RK |
742 | } |
743 | ||
744 | void nilfs_truncate(struct inode *inode) | |
745 | { | |
746 | unsigned long blkoff; | |
747 | unsigned int blocksize; | |
748 | struct nilfs_transaction_info ti; | |
749 | struct super_block *sb = inode->i_sb; | |
750 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
05fe58fd RK |
751 | |
752 | if (!test_bit(NILFS_I_BMAP, &ii->i_state)) | |
753 | return; | |
754 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
755 | return; | |
756 | ||
757 | blocksize = sb->s_blocksize; | |
758 | blkoff = (inode->i_size + blocksize - 1) >> sb->s_blocksize_bits; | |
1f5abe7e | 759 | nilfs_transaction_begin(sb, &ti, 0); /* never fails */ |
05fe58fd RK |
760 | |
761 | block_truncate_page(inode->i_mapping, inode->i_size, nilfs_get_block); | |
762 | ||
763 | nilfs_truncate_bmap(ii, blkoff); | |
764 | ||
765 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
766 | if (IS_SYNC(inode)) | |
767 | nilfs_set_transaction_flag(NILFS_TI_SYNC); | |
768 | ||
abdb318b | 769 | nilfs_mark_inode_dirty(inode); |
bcbc8c64 | 770 | nilfs_set_file_dirty(inode, 0); |
47420c79 | 771 | nilfs_transaction_commit(sb); |
05fe58fd RK |
772 | /* May construct a logical segment and may fail in sync mode. |
773 | But truncate has no return value. */ | |
774 | } | |
775 | ||
6fd1e5c9 AV |
776 | static void nilfs_clear_inode(struct inode *inode) |
777 | { | |
778 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
518d1a6a | 779 | struct nilfs_mdt_info *mdi = NILFS_MDT(inode); |
6fd1e5c9 AV |
780 | |
781 | /* | |
782 | * Free resources allocated in nilfs_read_inode(), here. | |
783 | */ | |
784 | BUG_ON(!list_empty(&ii->i_dirty)); | |
785 | brelse(ii->i_bh); | |
786 | ii->i_bh = NULL; | |
787 | ||
518d1a6a RK |
788 | if (mdi && mdi->mi_palloc_cache) |
789 | nilfs_palloc_destroy_cache(inode); | |
790 | ||
6fd1e5c9 AV |
791 | if (test_bit(NILFS_I_BMAP, &ii->i_state)) |
792 | nilfs_bmap_clear(ii->i_bmap); | |
793 | ||
794 | nilfs_btnode_cache_clear(&ii->i_btnode_cache); | |
4d8d9293 RK |
795 | |
796 | if (ii->i_root && inode->i_ino == NILFS_ROOT_INO) | |
797 | nilfs_put_root(ii->i_root); | |
6fd1e5c9 AV |
798 | } |
799 | ||
800 | void nilfs_evict_inode(struct inode *inode) | |
05fe58fd RK |
801 | { |
802 | struct nilfs_transaction_info ti; | |
803 | struct super_block *sb = inode->i_sb; | |
804 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
25b18d39 | 805 | int ret; |
05fe58fd | 806 | |
4d8d9293 | 807 | if (inode->i_nlink || !ii->i_root || unlikely(is_bad_inode(inode))) { |
91b0abe3 | 808 | truncate_inode_pages_final(&inode->i_data); |
dbd5768f | 809 | clear_inode(inode); |
6fd1e5c9 | 810 | nilfs_clear_inode(inode); |
05fe58fd RK |
811 | return; |
812 | } | |
1f5abe7e RK |
813 | nilfs_transaction_begin(sb, &ti, 0); /* never fails */ |
814 | ||
91b0abe3 | 815 | truncate_inode_pages_final(&inode->i_data); |
05fe58fd | 816 | |
e912a5b6 | 817 | /* TODO: some of the following operations may fail. */ |
05fe58fd | 818 | nilfs_truncate_bmap(ii, 0); |
abdb318b | 819 | nilfs_mark_inode_dirty(inode); |
dbd5768f | 820 | clear_inode(inode); |
e912a5b6 | 821 | |
25b18d39 RK |
822 | ret = nilfs_ifile_delete_inode(ii->i_root->ifile, inode->i_ino); |
823 | if (!ret) | |
e5f7f848 | 824 | atomic64_dec(&ii->i_root->inodes_count); |
e912a5b6 | 825 | |
6fd1e5c9 | 826 | nilfs_clear_inode(inode); |
e912a5b6 | 827 | |
05fe58fd RK |
828 | if (IS_SYNC(inode)) |
829 | nilfs_set_transaction_flag(NILFS_TI_SYNC); | |
47420c79 | 830 | nilfs_transaction_commit(sb); |
05fe58fd RK |
831 | /* May construct a logical segment and may fail in sync mode. |
832 | But delete_inode has no return value. */ | |
833 | } | |
834 | ||
835 | int nilfs_setattr(struct dentry *dentry, struct iattr *iattr) | |
836 | { | |
837 | struct nilfs_transaction_info ti; | |
2b0143b5 | 838 | struct inode *inode = d_inode(dentry); |
05fe58fd | 839 | struct super_block *sb = inode->i_sb; |
47420c79 | 840 | int err; |
05fe58fd RK |
841 | |
842 | err = inode_change_ok(inode, iattr); | |
843 | if (err) | |
844 | return err; | |
845 | ||
846 | err = nilfs_transaction_begin(sb, &ti, 0); | |
847 | if (unlikely(err)) | |
848 | return err; | |
1025774c CH |
849 | |
850 | if ((iattr->ia_valid & ATTR_SIZE) && | |
851 | iattr->ia_size != i_size_read(inode)) { | |
562c72aa | 852 | inode_dio_wait(inode); |
2d1b399b MS |
853 | truncate_setsize(inode, iattr->ia_size); |
854 | nilfs_truncate(inode); | |
1025774c CH |
855 | } |
856 | ||
857 | setattr_copy(inode, iattr); | |
858 | mark_inode_dirty(inode); | |
859 | ||
860 | if (iattr->ia_valid & ATTR_MODE) { | |
05fe58fd | 861 | err = nilfs_acl_chmod(inode); |
1025774c CH |
862 | if (unlikely(err)) |
863 | goto out_err; | |
864 | } | |
865 | ||
866 | return nilfs_transaction_commit(sb); | |
47420c79 | 867 | |
1025774c CH |
868 | out_err: |
869 | nilfs_transaction_abort(sb); | |
47420c79 | 870 | return err; |
05fe58fd RK |
871 | } |
872 | ||
10556cb2 | 873 | int nilfs_permission(struct inode *inode, int mask) |
dc3d3b81 | 874 | { |
730e908f | 875 | struct nilfs_root *root = NILFS_I(inode)->i_root; |
dc3d3b81 RK |
876 | if ((mask & MAY_WRITE) && root && |
877 | root->cno != NILFS_CPTREE_CURRENT_CNO) | |
878 | return -EROFS; /* snapshot is not writable */ | |
879 | ||
2830ba7f | 880 | return generic_permission(inode, mask); |
dc3d3b81 RK |
881 | } |
882 | ||
bcbc8c64 | 883 | int nilfs_load_inode_block(struct inode *inode, struct buffer_head **pbh) |
05fe58fd | 884 | { |
e3154e97 | 885 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
05fe58fd RK |
886 | struct nilfs_inode_info *ii = NILFS_I(inode); |
887 | int err; | |
888 | ||
693dd321 | 889 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd | 890 | if (ii->i_bh == NULL) { |
693dd321 | 891 | spin_unlock(&nilfs->ns_inode_lock); |
e912a5b6 RK |
892 | err = nilfs_ifile_get_inode_block(ii->i_root->ifile, |
893 | inode->i_ino, pbh); | |
05fe58fd RK |
894 | if (unlikely(err)) |
895 | return err; | |
693dd321 | 896 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd RK |
897 | if (ii->i_bh == NULL) |
898 | ii->i_bh = *pbh; | |
899 | else { | |
900 | brelse(*pbh); | |
901 | *pbh = ii->i_bh; | |
902 | } | |
903 | } else | |
904 | *pbh = ii->i_bh; | |
905 | ||
906 | get_bh(*pbh); | |
693dd321 | 907 | spin_unlock(&nilfs->ns_inode_lock); |
05fe58fd RK |
908 | return 0; |
909 | } | |
910 | ||
911 | int nilfs_inode_dirty(struct inode *inode) | |
912 | { | |
913 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
e3154e97 | 914 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
05fe58fd RK |
915 | int ret = 0; |
916 | ||
917 | if (!list_empty(&ii->i_dirty)) { | |
693dd321 | 918 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd RK |
919 | ret = test_bit(NILFS_I_DIRTY, &ii->i_state) || |
920 | test_bit(NILFS_I_BUSY, &ii->i_state); | |
693dd321 | 921 | spin_unlock(&nilfs->ns_inode_lock); |
05fe58fd RK |
922 | } |
923 | return ret; | |
924 | } | |
925 | ||
bcbc8c64 | 926 | int nilfs_set_file_dirty(struct inode *inode, unsigned nr_dirty) |
05fe58fd RK |
927 | { |
928 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
e3154e97 | 929 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
05fe58fd | 930 | |
693dd321 | 931 | atomic_add(nr_dirty, &nilfs->ns_ndirtyblks); |
05fe58fd | 932 | |
458c5b08 | 933 | if (test_and_set_bit(NILFS_I_DIRTY, &ii->i_state)) |
05fe58fd RK |
934 | return 0; |
935 | ||
693dd321 | 936 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd RK |
937 | if (!test_bit(NILFS_I_QUEUED, &ii->i_state) && |
938 | !test_bit(NILFS_I_BUSY, &ii->i_state)) { | |
939 | /* Because this routine may race with nilfs_dispose_list(), | |
940 | we have to check NILFS_I_QUEUED here, too. */ | |
941 | if (list_empty(&ii->i_dirty) && igrab(inode) == NULL) { | |
942 | /* This will happen when somebody is freeing | |
943 | this inode. */ | |
693dd321 | 944 | nilfs_warning(inode->i_sb, __func__, |
05fe58fd RK |
945 | "cannot get inode (ino=%lu)\n", |
946 | inode->i_ino); | |
693dd321 | 947 | spin_unlock(&nilfs->ns_inode_lock); |
05fe58fd RK |
948 | return -EINVAL; /* NILFS_I_DIRTY may remain for |
949 | freeing inode */ | |
950 | } | |
eaae0f37 | 951 | list_move_tail(&ii->i_dirty, &nilfs->ns_dirty_files); |
05fe58fd RK |
952 | set_bit(NILFS_I_QUEUED, &ii->i_state); |
953 | } | |
693dd321 | 954 | spin_unlock(&nilfs->ns_inode_lock); |
05fe58fd RK |
955 | return 0; |
956 | } | |
957 | ||
b9f66140 | 958 | int __nilfs_mark_inode_dirty(struct inode *inode, int flags) |
05fe58fd | 959 | { |
05fe58fd RK |
960 | struct buffer_head *ibh; |
961 | int err; | |
962 | ||
bcbc8c64 | 963 | err = nilfs_load_inode_block(inode, &ibh); |
05fe58fd RK |
964 | if (unlikely(err)) { |
965 | nilfs_warning(inode->i_sb, __func__, | |
966 | "failed to reget inode block.\n"); | |
967 | return err; | |
968 | } | |
b9f66140 | 969 | nilfs_update_inode(inode, ibh, flags); |
5fc7b141 | 970 | mark_buffer_dirty(ibh); |
e912a5b6 | 971 | nilfs_mdt_mark_dirty(NILFS_I(inode)->i_root->ifile); |
05fe58fd RK |
972 | brelse(ibh); |
973 | return 0; | |
974 | } | |
975 | ||
976 | /** | |
977 | * nilfs_dirty_inode - reflect changes on given inode to an inode block. | |
978 | * @inode: inode of the file to be registered. | |
979 | * | |
980 | * nilfs_dirty_inode() loads a inode block containing the specified | |
981 | * @inode and copies data from a nilfs_inode to a corresponding inode | |
982 | * entry in the inode block. This operation is excluded from the segment | |
983 | * construction. This function can be called both as a single operation | |
984 | * and as a part of indivisible file operations. | |
985 | */ | |
aa385729 | 986 | void nilfs_dirty_inode(struct inode *inode, int flags) |
05fe58fd RK |
987 | { |
988 | struct nilfs_transaction_info ti; | |
7d6cd92f | 989 | struct nilfs_mdt_info *mdi = NILFS_MDT(inode); |
05fe58fd RK |
990 | |
991 | if (is_bad_inode(inode)) { | |
992 | nilfs_warning(inode->i_sb, __func__, | |
993 | "tried to mark bad_inode dirty. ignored.\n"); | |
994 | dump_stack(); | |
995 | return; | |
996 | } | |
7d6cd92f RK |
997 | if (mdi) { |
998 | nilfs_mdt_mark_dirty(inode); | |
999 | return; | |
1000 | } | |
05fe58fd | 1001 | nilfs_transaction_begin(inode->i_sb, &ti, 0); |
b9f66140 | 1002 | __nilfs_mark_inode_dirty(inode, flags); |
47420c79 | 1003 | nilfs_transaction_commit(inode->i_sb); /* never fails */ |
05fe58fd | 1004 | } |
622daaff RK |
1005 | |
1006 | int nilfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, | |
1007 | __u64 start, __u64 len) | |
1008 | { | |
0ef28f9a | 1009 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
622daaff RK |
1010 | __u64 logical = 0, phys = 0, size = 0; |
1011 | __u32 flags = 0; | |
1012 | loff_t isize; | |
1013 | sector_t blkoff, end_blkoff; | |
1014 | sector_t delalloc_blkoff; | |
1015 | unsigned long delalloc_blklen; | |
1016 | unsigned int blkbits = inode->i_blkbits; | |
1017 | int ret, n; | |
1018 | ||
1019 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
1020 | if (ret) | |
1021 | return ret; | |
1022 | ||
1023 | mutex_lock(&inode->i_mutex); | |
1024 | ||
1025 | isize = i_size_read(inode); | |
1026 | ||
1027 | blkoff = start >> blkbits; | |
1028 | end_blkoff = (start + len - 1) >> blkbits; | |
1029 | ||
1030 | delalloc_blklen = nilfs_find_uncommitted_extent(inode, blkoff, | |
1031 | &delalloc_blkoff); | |
1032 | ||
1033 | do { | |
1034 | __u64 blkphy; | |
1035 | unsigned int maxblocks; | |
1036 | ||
1037 | if (delalloc_blklen && blkoff == delalloc_blkoff) { | |
1038 | if (size) { | |
1039 | /* End of the current extent */ | |
1040 | ret = fiemap_fill_next_extent( | |
1041 | fieinfo, logical, phys, size, flags); | |
1042 | if (ret) | |
1043 | break; | |
1044 | } | |
1045 | if (blkoff > end_blkoff) | |
1046 | break; | |
1047 | ||
1048 | flags = FIEMAP_EXTENT_MERGED | FIEMAP_EXTENT_DELALLOC; | |
1049 | logical = blkoff << blkbits; | |
1050 | phys = 0; | |
1051 | size = delalloc_blklen << blkbits; | |
1052 | ||
1053 | blkoff = delalloc_blkoff + delalloc_blklen; | |
1054 | delalloc_blklen = nilfs_find_uncommitted_extent( | |
1055 | inode, blkoff, &delalloc_blkoff); | |
1056 | continue; | |
1057 | } | |
1058 | ||
1059 | /* | |
1060 | * Limit the number of blocks that we look up so as | |
1061 | * not to get into the next delayed allocation extent. | |
1062 | */ | |
1063 | maxblocks = INT_MAX; | |
1064 | if (delalloc_blklen) | |
1065 | maxblocks = min_t(sector_t, delalloc_blkoff - blkoff, | |
1066 | maxblocks); | |
1067 | blkphy = 0; | |
1068 | ||
1069 | down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); | |
1070 | n = nilfs_bmap_lookup_contig( | |
1071 | NILFS_I(inode)->i_bmap, blkoff, &blkphy, maxblocks); | |
1072 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); | |
1073 | ||
1074 | if (n < 0) { | |
1075 | int past_eof; | |
1076 | ||
1077 | if (unlikely(n != -ENOENT)) | |
1078 | break; /* error */ | |
1079 | ||
1080 | /* HOLE */ | |
1081 | blkoff++; | |
1082 | past_eof = ((blkoff << blkbits) >= isize); | |
1083 | ||
1084 | if (size) { | |
1085 | /* End of the current extent */ | |
1086 | ||
1087 | if (past_eof) | |
1088 | flags |= FIEMAP_EXTENT_LAST; | |
1089 | ||
1090 | ret = fiemap_fill_next_extent( | |
1091 | fieinfo, logical, phys, size, flags); | |
1092 | if (ret) | |
1093 | break; | |
1094 | size = 0; | |
1095 | } | |
1096 | if (blkoff > end_blkoff || past_eof) | |
1097 | break; | |
1098 | } else { | |
1099 | if (size) { | |
1100 | if (phys && blkphy << blkbits == phys + size) { | |
1101 | /* The current extent goes on */ | |
1102 | size += n << blkbits; | |
1103 | } else { | |
1104 | /* Terminate the current extent */ | |
1105 | ret = fiemap_fill_next_extent( | |
1106 | fieinfo, logical, phys, size, | |
1107 | flags); | |
1108 | if (ret || blkoff > end_blkoff) | |
1109 | break; | |
1110 | ||
1111 | /* Start another extent */ | |
1112 | flags = FIEMAP_EXTENT_MERGED; | |
1113 | logical = blkoff << blkbits; | |
1114 | phys = blkphy << blkbits; | |
1115 | size = n << blkbits; | |
1116 | } | |
1117 | } else { | |
1118 | /* Start a new extent */ | |
1119 | flags = FIEMAP_EXTENT_MERGED; | |
1120 | logical = blkoff << blkbits; | |
1121 | phys = blkphy << blkbits; | |
1122 | size = n << blkbits; | |
1123 | } | |
1124 | blkoff += n; | |
1125 | } | |
1126 | cond_resched(); | |
1127 | } while (true); | |
1128 | ||
1129 | /* If ret is 1 then we just hit the end of the extent array */ | |
1130 | if (ret == 1) | |
1131 | ret = 0; | |
1132 | ||
1133 | mutex_unlock(&inode->i_mutex); | |
1134 | return ret; | |
1135 | } |