Commit | Line | Data |
---|---|---|
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 | * | |
4b420ab4 | 16 | * Written by Ryusuke Konishi. |
05fe58fd RK |
17 | * |
18 | */ | |
19 | ||
20 | #include <linux/buffer_head.h> | |
5a0e3ad6 | 21 | #include <linux/gfp.h> |
05fe58fd | 22 | #include <linux/mpage.h> |
56d7acc7 | 23 | #include <linux/pagemap.h> |
05fe58fd | 24 | #include <linux/writeback.h> |
e2e40f2c | 25 | #include <linux/uio.h> |
05fe58fd | 26 | #include "nilfs.h" |
6fd1e5c9 | 27 | #include "btnode.h" |
05fe58fd RK |
28 | #include "segment.h" |
29 | #include "page.h" | |
30 | #include "mdt.h" | |
31 | #include "cpfile.h" | |
32 | #include "ifile.h" | |
33 | ||
f5974c8f VD |
34 | /** |
35 | * struct nilfs_iget_args - arguments used during comparison between inodes | |
36 | * @ino: inode number | |
37 | * @cno: checkpoint number | |
38 | * @root: pointer on NILFS root object (mounted checkpoint) | |
39 | * @for_gc: inode for GC flag | |
40 | */ | |
0e14a359 RK |
41 | struct nilfs_iget_args { |
42 | u64 ino; | |
43 | __u64 cno; | |
4d8d9293 | 44 | struct nilfs_root *root; |
0e14a359 RK |
45 | int for_gc; |
46 | }; | |
05fe58fd | 47 | |
705304a8 RK |
48 | static int nilfs_iget_test(struct inode *inode, void *opaque); |
49 | ||
be667377 RK |
50 | void nilfs_inode_add_blocks(struct inode *inode, int n) |
51 | { | |
52 | struct nilfs_root *root = NILFS_I(inode)->i_root; | |
53 | ||
54 | inode_add_bytes(inode, (1 << inode->i_blkbits) * n); | |
55 | if (root) | |
e5f7f848 | 56 | atomic64_add(n, &root->blocks_count); |
be667377 RK |
57 | } |
58 | ||
59 | void nilfs_inode_sub_blocks(struct inode *inode, int n) | |
60 | { | |
61 | struct nilfs_root *root = NILFS_I(inode)->i_root; | |
62 | ||
63 | inode_sub_bytes(inode, (1 << inode->i_blkbits) * n); | |
64 | if (root) | |
e5f7f848 | 65 | atomic64_sub(n, &root->blocks_count); |
be667377 RK |
66 | } |
67 | ||
05fe58fd RK |
68 | /** |
69 | * nilfs_get_block() - get a file block on the filesystem (callback function) | |
70 | * @inode - inode struct of the target file | |
71 | * @blkoff - file block number | |
72 | * @bh_result - buffer head to be mapped on | |
73 | * @create - indicate whether allocating the block or not when it has not | |
74 | * been allocated yet. | |
75 | * | |
76 | * This function does not issue actual read request of the specified data | |
77 | * block. It is done by VFS. | |
05fe58fd RK |
78 | */ |
79 | int nilfs_get_block(struct inode *inode, sector_t blkoff, | |
80 | struct buffer_head *bh_result, int create) | |
81 | { | |
82 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
0ef28f9a | 83 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
c3a7abf0 | 84 | __u64 blknum = 0; |
05fe58fd | 85 | int err = 0, ret; |
0c6c44cb | 86 | unsigned int maxblocks = bh_result->b_size >> inode->i_blkbits; |
05fe58fd | 87 | |
0ef28f9a | 88 | down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
c3a7abf0 | 89 | ret = nilfs_bmap_lookup_contig(ii->i_bmap, blkoff, &blknum, maxblocks); |
0ef28f9a | 90 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
c3a7abf0 | 91 | if (ret >= 0) { /* found */ |
05fe58fd | 92 | map_bh(bh_result, inode->i_sb, blknum); |
c3a7abf0 RK |
93 | if (ret > 0) |
94 | bh_result->b_size = (ret << inode->i_blkbits); | |
05fe58fd RK |
95 | goto out; |
96 | } | |
05fe58fd RK |
97 | /* data block was not found */ |
98 | if (ret == -ENOENT && create) { | |
99 | struct nilfs_transaction_info ti; | |
100 | ||
101 | bh_result->b_blocknr = 0; | |
102 | err = nilfs_transaction_begin(inode->i_sb, &ti, 1); | |
103 | if (unlikely(err)) | |
104 | goto out; | |
3568a13f | 105 | err = nilfs_bmap_insert(ii->i_bmap, blkoff, |
05fe58fd | 106 | (unsigned long)bh_result); |
05fe58fd RK |
107 | if (unlikely(err != 0)) { |
108 | if (err == -EEXIST) { | |
109 | /* | |
110 | * The get_block() function could be called | |
111 | * from multiple callers for an inode. | |
112 | * However, the page having this block must | |
113 | * be locked in this case. | |
114 | */ | |
1f5abe7e | 115 | printk(KERN_WARNING |
05fe58fd RK |
116 | "nilfs_get_block: a race condition " |
117 | "while inserting a data block. " | |
118 | "(inode number=%lu, file block " | |
119 | "offset=%llu)\n", | |
120 | inode->i_ino, | |
121 | (unsigned long long)blkoff); | |
1f5abe7e | 122 | err = 0; |
05fe58fd | 123 | } |
47420c79 | 124 | nilfs_transaction_abort(inode->i_sb); |
05fe58fd RK |
125 | goto out; |
126 | } | |
b9f66140 | 127 | nilfs_mark_inode_dirty_sync(inode); |
47420c79 | 128 | nilfs_transaction_commit(inode->i_sb); /* never fails */ |
05fe58fd RK |
129 | /* Error handling should be detailed */ |
130 | set_buffer_new(bh_result); | |
27e6c7a3 | 131 | set_buffer_delay(bh_result); |
076a378b RK |
132 | map_bh(bh_result, inode->i_sb, 0); |
133 | /* Disk block number must be changed to proper value */ | |
134 | ||
05fe58fd | 135 | } else if (ret == -ENOENT) { |
076a378b RK |
136 | /* |
137 | * not found is not error (e.g. hole); must return without | |
138 | * the mapped state flag. | |
139 | */ | |
05fe58fd RK |
140 | ; |
141 | } else { | |
142 | err = ret; | |
143 | } | |
144 | ||
145 | out: | |
146 | return err; | |
147 | } | |
148 | ||
149 | /** | |
150 | * nilfs_readpage() - implement readpage() method of nilfs_aops {} | |
151 | * address_space_operations. | |
152 | * @file - file struct of the file to be read | |
153 | * @page - the page to be read | |
154 | */ | |
155 | static int nilfs_readpage(struct file *file, struct page *page) | |
156 | { | |
157 | return mpage_readpage(page, nilfs_get_block); | |
158 | } | |
159 | ||
160 | /** | |
161 | * nilfs_readpages() - implement readpages() method of nilfs_aops {} | |
162 | * address_space_operations. | |
163 | * @file - file struct of the file to be read | |
164 | * @mapping - address_space struct used for reading multiple pages | |
165 | * @pages - the pages to be read | |
166 | * @nr_pages - number of pages to be read | |
167 | */ | |
168 | static int nilfs_readpages(struct file *file, struct address_space *mapping, | |
0c6c44cb | 169 | struct list_head *pages, unsigned int nr_pages) |
05fe58fd RK |
170 | { |
171 | return mpage_readpages(mapping, pages, nr_pages, nilfs_get_block); | |
172 | } | |
173 | ||
174 | static int nilfs_writepages(struct address_space *mapping, | |
175 | struct writeback_control *wbc) | |
176 | { | |
f30bf3e4 RK |
177 | struct inode *inode = mapping->host; |
178 | int err = 0; | |
179 | ||
8c26c4e2 VD |
180 | if (inode->i_sb->s_flags & MS_RDONLY) { |
181 | nilfs_clear_dirty_pages(mapping, false); | |
182 | return -EROFS; | |
183 | } | |
184 | ||
f30bf3e4 RK |
185 | if (wbc->sync_mode == WB_SYNC_ALL) |
186 | err = nilfs_construct_dsync_segment(inode->i_sb, inode, | |
187 | wbc->range_start, | |
188 | wbc->range_end); | |
189 | return err; | |
05fe58fd RK |
190 | } |
191 | ||
192 | static int nilfs_writepage(struct page *page, struct writeback_control *wbc) | |
193 | { | |
194 | struct inode *inode = page->mapping->host; | |
195 | int err; | |
196 | ||
eb53b6db | 197 | if (inode->i_sb->s_flags & MS_RDONLY) { |
8c26c4e2 VD |
198 | /* |
199 | * It means that filesystem was remounted in read-only | |
200 | * mode because of error or metadata corruption. But we | |
201 | * have dirty pages that try to be flushed in background. | |
202 | * So, here we simply discard this dirty page. | |
203 | */ | |
204 | nilfs_clear_dirty_page(page, false); | |
205 | unlock_page(page); | |
206 | return -EROFS; | |
207 | } | |
208 | ||
05fe58fd RK |
209 | redirty_page_for_writepage(wbc, page); |
210 | unlock_page(page); | |
211 | ||
212 | if (wbc->sync_mode == WB_SYNC_ALL) { | |
213 | err = nilfs_construct_segment(inode->i_sb); | |
214 | if (unlikely(err)) | |
215 | return err; | |
216 | } else if (wbc->for_reclaim) | |
217 | nilfs_flush_segment(inode->i_sb, inode->i_ino); | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
222 | static int nilfs_set_page_dirty(struct page *page) | |
223 | { | |
56d7acc7 | 224 | struct inode *inode = page->mapping->host; |
136e8770 | 225 | int ret = __set_page_dirty_nobuffers(page); |
05fe58fd | 226 | |
136e8770 | 227 | if (page_has_buffers(page)) { |
0c6c44cb | 228 | unsigned int nr_dirty = 0; |
136e8770 | 229 | struct buffer_head *bh, *head; |
05fe58fd | 230 | |
136e8770 RK |
231 | /* |
232 | * This page is locked by callers, and no other thread | |
233 | * concurrently marks its buffers dirty since they are | |
234 | * only dirtied through routines in fs/buffer.c in | |
235 | * which call sites of mark_buffer_dirty are protected | |
236 | * by page lock. | |
237 | */ | |
238 | bh = head = page_buffers(page); | |
239 | do { | |
240 | /* Do not mark hole blocks dirty */ | |
241 | if (buffer_dirty(bh) || !buffer_mapped(bh)) | |
242 | continue; | |
243 | ||
244 | set_buffer_dirty(bh); | |
245 | nr_dirty++; | |
246 | } while (bh = bh->b_this_page, bh != head); | |
247 | ||
248 | if (nr_dirty) | |
249 | nilfs_set_file_dirty(inode, nr_dirty); | |
56d7acc7 | 250 | } else if (ret) { |
0c6c44cb | 251 | unsigned int nr_dirty = 1 << (PAGE_SHIFT - inode->i_blkbits); |
56d7acc7 AR |
252 | |
253 | nilfs_set_file_dirty(inode, nr_dirty); | |
05fe58fd RK |
254 | } |
255 | return ret; | |
256 | } | |
257 | ||
2d1b399b MS |
258 | void nilfs_write_failed(struct address_space *mapping, loff_t to) |
259 | { | |
260 | struct inode *inode = mapping->host; | |
261 | ||
262 | if (to > inode->i_size) { | |
7caef267 | 263 | truncate_pagecache(inode, inode->i_size); |
2d1b399b MS |
264 | nilfs_truncate(inode); |
265 | } | |
266 | } | |
267 | ||
05fe58fd RK |
268 | static int nilfs_write_begin(struct file *file, struct address_space *mapping, |
269 | loff_t pos, unsigned len, unsigned flags, | |
270 | struct page **pagep, void **fsdata) | |
271 | ||
272 | { | |
273 | struct inode *inode = mapping->host; | |
274 | int err = nilfs_transaction_begin(inode->i_sb, NULL, 1); | |
275 | ||
276 | if (unlikely(err)) | |
277 | return err; | |
278 | ||
155130a4 CH |
279 | err = block_write_begin(mapping, pos, len, flags, pagep, |
280 | nilfs_get_block); | |
281 | if (unlikely(err)) { | |
2d1b399b | 282 | nilfs_write_failed(mapping, pos + len); |
47420c79 | 283 | nilfs_transaction_abort(inode->i_sb); |
155130a4 | 284 | } |
05fe58fd RK |
285 | return err; |
286 | } | |
287 | ||
288 | static int nilfs_write_end(struct file *file, struct address_space *mapping, | |
289 | loff_t pos, unsigned len, unsigned copied, | |
290 | struct page *page, void *fsdata) | |
291 | { | |
292 | struct inode *inode = mapping->host; | |
0c6c44cb RK |
293 | unsigned int start = pos & (PAGE_SIZE - 1); |
294 | unsigned int nr_dirty; | |
05fe58fd RK |
295 | int err; |
296 | ||
297 | nr_dirty = nilfs_page_count_clean_buffers(page, start, | |
298 | start + copied); | |
299 | copied = generic_write_end(file, mapping, pos, len, copied, page, | |
300 | fsdata); | |
bcbc8c64 | 301 | nilfs_set_file_dirty(inode, nr_dirty); |
47420c79 | 302 | err = nilfs_transaction_commit(inode->i_sb); |
05fe58fd RK |
303 | return err ? : copied; |
304 | } | |
305 | ||
306 | static ssize_t | |
c8b8e32d | 307 | nilfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
05fe58fd | 308 | { |
6b6dabc8 | 309 | struct inode *inode = file_inode(iocb->ki_filp); |
05fe58fd | 310 | |
6f673763 | 311 | if (iov_iter_rw(iter) == WRITE) |
05fe58fd RK |
312 | return 0; |
313 | ||
314 | /* Needs synchronization with the cleaner */ | |
c8b8e32d | 315 | return blockdev_direct_IO(iocb, inode, iter, nilfs_get_block); |
05fe58fd RK |
316 | } |
317 | ||
7f09410b | 318 | const struct address_space_operations nilfs_aops = { |
05fe58fd RK |
319 | .writepage = nilfs_writepage, |
320 | .readpage = nilfs_readpage, | |
05fe58fd RK |
321 | .writepages = nilfs_writepages, |
322 | .set_page_dirty = nilfs_set_page_dirty, | |
323 | .readpages = nilfs_readpages, | |
324 | .write_begin = nilfs_write_begin, | |
325 | .write_end = nilfs_write_end, | |
326 | /* .releasepage = nilfs_releasepage, */ | |
327 | .invalidatepage = block_invalidatepage, | |
328 | .direct_IO = nilfs_direct_IO, | |
258ef67e | 329 | .is_partially_uptodate = block_is_partially_uptodate, |
05fe58fd RK |
330 | }; |
331 | ||
705304a8 RK |
332 | static int nilfs_insert_inode_locked(struct inode *inode, |
333 | struct nilfs_root *root, | |
334 | unsigned long ino) | |
335 | { | |
336 | struct nilfs_iget_args args = { | |
337 | .ino = ino, .root = root, .cno = 0, .for_gc = 0 | |
338 | }; | |
339 | ||
340 | return insert_inode_locked4(inode, ino, nilfs_iget_test, &args); | |
341 | } | |
342 | ||
c6e49e3f | 343 | struct inode *nilfs_new_inode(struct inode *dir, umode_t mode) |
05fe58fd RK |
344 | { |
345 | struct super_block *sb = dir->i_sb; | |
e3154e97 | 346 | struct the_nilfs *nilfs = sb->s_fs_info; |
05fe58fd RK |
347 | struct inode *inode; |
348 | struct nilfs_inode_info *ii; | |
4d8d9293 | 349 | struct nilfs_root *root; |
05fe58fd RK |
350 | int err = -ENOMEM; |
351 | ino_t ino; | |
352 | ||
353 | inode = new_inode(sb); | |
354 | if (unlikely(!inode)) | |
355 | goto failed; | |
356 | ||
357 | mapping_set_gfp_mask(inode->i_mapping, | |
c62d2555 | 358 | mapping_gfp_constraint(inode->i_mapping, ~__GFP_FS)); |
05fe58fd | 359 | |
4d8d9293 | 360 | root = NILFS_I(dir)->i_root; |
05fe58fd RK |
361 | ii = NILFS_I(inode); |
362 | ii->i_state = 1 << NILFS_I_NEW; | |
4d8d9293 | 363 | ii->i_root = root; |
05fe58fd | 364 | |
e912a5b6 | 365 | err = nilfs_ifile_create_inode(root->ifile, &ino, &ii->i_bh); |
05fe58fd RK |
366 | if (unlikely(err)) |
367 | goto failed_ifile_create_inode; | |
368 | /* reference count of i_bh inherits from nilfs_mdt_read_block() */ | |
369 | ||
e5f7f848 | 370 | atomic64_inc(&root->inodes_count); |
73459dcc | 371 | inode_init_owner(inode, dir, mode); |
05fe58fd RK |
372 | inode->i_ino = ino; |
373 | inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; | |
374 | ||
375 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) { | |
376 | err = nilfs_bmap_read(ii->i_bmap, NULL); | |
377 | if (err < 0) | |
705304a8 | 378 | goto failed_after_creation; |
05fe58fd RK |
379 | |
380 | set_bit(NILFS_I_BMAP, &ii->i_state); | |
381 | /* No lock is needed; iget() ensures it. */ | |
382 | } | |
383 | ||
b253a3e4 RK |
384 | ii->i_flags = nilfs_mask_flags( |
385 | mode, NILFS_I(dir)->i_flags & NILFS_FL_INHERITED); | |
05fe58fd RK |
386 | |
387 | /* ii->i_file_acl = 0; */ | |
388 | /* ii->i_dir_acl = 0; */ | |
05fe58fd | 389 | ii->i_dir_start_lookup = 0; |
05fe58fd | 390 | nilfs_set_inode_flags(inode); |
9b1fc4e4 RK |
391 | spin_lock(&nilfs->ns_next_gen_lock); |
392 | inode->i_generation = nilfs->ns_next_generation++; | |
393 | spin_unlock(&nilfs->ns_next_gen_lock); | |
705304a8 RK |
394 | if (nilfs_insert_inode_locked(inode, root, ino) < 0) { |
395 | err = -EIO; | |
396 | goto failed_after_creation; | |
397 | } | |
05fe58fd RK |
398 | |
399 | err = nilfs_init_acl(inode, dir); | |
400 | if (unlikely(err)) | |
076a378b RK |
401 | /* |
402 | * Never occur. When supporting nilfs_init_acl(), | |
403 | * proper cancellation of above jobs should be considered. | |
404 | */ | |
405 | goto failed_after_creation; | |
05fe58fd | 406 | |
05fe58fd RK |
407 | return inode; |
408 | ||
705304a8 | 409 | failed_after_creation: |
6d6b77f1 | 410 | clear_nlink(inode); |
705304a8 | 411 | unlock_new_inode(inode); |
076a378b RK |
412 | iput(inode); /* |
413 | * raw_inode will be deleted through | |
414 | * nilfs_evict_inode(). | |
415 | */ | |
05fe58fd RK |
416 | goto failed; |
417 | ||
418 | failed_ifile_create_inode: | |
419 | make_bad_inode(inode); | |
076a378b | 420 | iput(inode); |
05fe58fd RK |
421 | failed: |
422 | return ERR_PTR(err); | |
423 | } | |
424 | ||
05fe58fd RK |
425 | void nilfs_set_inode_flags(struct inode *inode) |
426 | { | |
427 | unsigned int flags = NILFS_I(inode)->i_flags; | |
faea2c53 | 428 | unsigned int new_fl = 0; |
05fe58fd | 429 | |
f0c9f242 | 430 | if (flags & FS_SYNC_FL) |
faea2c53 | 431 | new_fl |= S_SYNC; |
f0c9f242 | 432 | if (flags & FS_APPEND_FL) |
faea2c53 | 433 | new_fl |= S_APPEND; |
f0c9f242 | 434 | if (flags & FS_IMMUTABLE_FL) |
faea2c53 | 435 | new_fl |= S_IMMUTABLE; |
f0c9f242 | 436 | if (flags & FS_NOATIME_FL) |
faea2c53 | 437 | new_fl |= S_NOATIME; |
f0c9f242 | 438 | if (flags & FS_DIRSYNC_FL) |
faea2c53 RK |
439 | new_fl |= S_DIRSYNC; |
440 | inode_set_flags(inode, new_fl, S_SYNC | S_APPEND | S_IMMUTABLE | | |
441 | S_NOATIME | S_DIRSYNC); | |
05fe58fd RK |
442 | } |
443 | ||
444 | int nilfs_read_inode_common(struct inode *inode, | |
445 | struct nilfs_inode *raw_inode) | |
446 | { | |
447 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
448 | int err; | |
449 | ||
450 | inode->i_mode = le16_to_cpu(raw_inode->i_mode); | |
305d3d0d EB |
451 | i_uid_write(inode, le32_to_cpu(raw_inode->i_uid)); |
452 | i_gid_write(inode, le32_to_cpu(raw_inode->i_gid)); | |
bfe86848 | 453 | set_nlink(inode, le16_to_cpu(raw_inode->i_links_count)); |
05fe58fd RK |
454 | inode->i_size = le64_to_cpu(raw_inode->i_size); |
455 | inode->i_atime.tv_sec = le64_to_cpu(raw_inode->i_mtime); | |
456 | inode->i_ctime.tv_sec = le64_to_cpu(raw_inode->i_ctime); | |
457 | inode->i_mtime.tv_sec = le64_to_cpu(raw_inode->i_mtime); | |
61239230 RK |
458 | inode->i_atime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec); |
459 | inode->i_ctime.tv_nsec = le32_to_cpu(raw_inode->i_ctime_nsec); | |
460 | inode->i_mtime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec); | |
705304a8 RK |
461 | if (inode->i_nlink == 0) |
462 | return -ESTALE; /* this inode is deleted */ | |
05fe58fd RK |
463 | |
464 | inode->i_blocks = le64_to_cpu(raw_inode->i_blocks); | |
465 | ii->i_flags = le32_to_cpu(raw_inode->i_flags); | |
466 | #if 0 | |
467 | ii->i_file_acl = le32_to_cpu(raw_inode->i_file_acl); | |
468 | ii->i_dir_acl = S_ISREG(inode->i_mode) ? | |
469 | 0 : le32_to_cpu(raw_inode->i_dir_acl); | |
470 | #endif | |
3cc811bf | 471 | ii->i_dir_start_lookup = 0; |
05fe58fd RK |
472 | inode->i_generation = le32_to_cpu(raw_inode->i_generation); |
473 | ||
474 | if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
475 | S_ISLNK(inode->i_mode)) { | |
476 | err = nilfs_bmap_read(ii->i_bmap, raw_inode); | |
477 | if (err < 0) | |
478 | return err; | |
479 | set_bit(NILFS_I_BMAP, &ii->i_state); | |
480 | /* No lock is needed; iget() ensures it. */ | |
481 | } | |
482 | return 0; | |
483 | } | |
484 | ||
e912a5b6 RK |
485 | static int __nilfs_read_inode(struct super_block *sb, |
486 | struct nilfs_root *root, unsigned long ino, | |
05fe58fd RK |
487 | struct inode *inode) |
488 | { | |
e3154e97 | 489 | struct the_nilfs *nilfs = sb->s_fs_info; |
05fe58fd RK |
490 | struct buffer_head *bh; |
491 | struct nilfs_inode *raw_inode; | |
492 | int err; | |
493 | ||
365e215c | 494 | down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
e912a5b6 | 495 | err = nilfs_ifile_get_inode_block(root->ifile, ino, &bh); |
05fe58fd RK |
496 | if (unlikely(err)) |
497 | goto bad_inode; | |
498 | ||
e912a5b6 | 499 | raw_inode = nilfs_ifile_map_inode(root->ifile, ino, bh); |
05fe58fd | 500 | |
1b2f5a64 RK |
501 | err = nilfs_read_inode_common(inode, raw_inode); |
502 | if (err) | |
05fe58fd RK |
503 | goto failed_unmap; |
504 | ||
505 | if (S_ISREG(inode->i_mode)) { | |
506 | inode->i_op = &nilfs_file_inode_operations; | |
507 | inode->i_fop = &nilfs_file_operations; | |
508 | inode->i_mapping->a_ops = &nilfs_aops; | |
05fe58fd RK |
509 | } else if (S_ISDIR(inode->i_mode)) { |
510 | inode->i_op = &nilfs_dir_inode_operations; | |
511 | inode->i_fop = &nilfs_dir_operations; | |
512 | inode->i_mapping->a_ops = &nilfs_aops; | |
513 | } else if (S_ISLNK(inode->i_mode)) { | |
514 | inode->i_op = &nilfs_symlink_inode_operations; | |
21fc61c7 | 515 | inode_nohighmem(inode); |
05fe58fd RK |
516 | inode->i_mapping->a_ops = &nilfs_aops; |
517 | } else { | |
518 | inode->i_op = &nilfs_special_inode_operations; | |
519 | init_special_inode( | |
520 | inode, inode->i_mode, | |
cdce214e | 521 | huge_decode_dev(le64_to_cpu(raw_inode->i_device_code))); |
05fe58fd | 522 | } |
e912a5b6 | 523 | nilfs_ifile_unmap_inode(root->ifile, ino, bh); |
05fe58fd | 524 | brelse(bh); |
365e215c | 525 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
05fe58fd | 526 | nilfs_set_inode_flags(inode); |
0ce187c4 | 527 | mapping_set_gfp_mask(inode->i_mapping, |
c62d2555 | 528 | mapping_gfp_constraint(inode->i_mapping, ~__GFP_FS)); |
05fe58fd RK |
529 | return 0; |
530 | ||
531 | failed_unmap: | |
e912a5b6 | 532 | nilfs_ifile_unmap_inode(root->ifile, ino, bh); |
05fe58fd RK |
533 | brelse(bh); |
534 | ||
535 | bad_inode: | |
365e215c | 536 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
05fe58fd RK |
537 | return err; |
538 | } | |
539 | ||
0e14a359 RK |
540 | static int nilfs_iget_test(struct inode *inode, void *opaque) |
541 | { | |
542 | struct nilfs_iget_args *args = opaque; | |
543 | struct nilfs_inode_info *ii; | |
544 | ||
4d8d9293 | 545 | if (args->ino != inode->i_ino || args->root != NILFS_I(inode)->i_root) |
0e14a359 RK |
546 | return 0; |
547 | ||
548 | ii = NILFS_I(inode); | |
549 | if (!test_bit(NILFS_I_GCINODE, &ii->i_state)) | |
550 | return !args->for_gc; | |
551 | ||
552 | return args->for_gc && args->cno == ii->i_cno; | |
553 | } | |
554 | ||
555 | static int nilfs_iget_set(struct inode *inode, void *opaque) | |
556 | { | |
557 | struct nilfs_iget_args *args = opaque; | |
558 | ||
559 | inode->i_ino = args->ino; | |
560 | if (args->for_gc) { | |
561 | NILFS_I(inode)->i_state = 1 << NILFS_I_GCINODE; | |
562 | NILFS_I(inode)->i_cno = args->cno; | |
4d8d9293 RK |
563 | NILFS_I(inode)->i_root = NULL; |
564 | } else { | |
565 | if (args->root && args->ino == NILFS_ROOT_INO) | |
566 | nilfs_get_root(args->root); | |
567 | NILFS_I(inode)->i_root = args->root; | |
0e14a359 RK |
568 | } |
569 | return 0; | |
570 | } | |
571 | ||
032dbb3b RK |
572 | struct inode *nilfs_ilookup(struct super_block *sb, struct nilfs_root *root, |
573 | unsigned long ino) | |
574 | { | |
575 | struct nilfs_iget_args args = { | |
576 | .ino = ino, .root = root, .cno = 0, .for_gc = 0 | |
577 | }; | |
578 | ||
579 | return ilookup5(sb, ino, nilfs_iget_test, &args); | |
580 | } | |
581 | ||
f1e89c86 RK |
582 | struct inode *nilfs_iget_locked(struct super_block *sb, struct nilfs_root *root, |
583 | unsigned long ino) | |
05fe58fd | 584 | { |
4d8d9293 RK |
585 | struct nilfs_iget_args args = { |
586 | .ino = ino, .root = root, .cno = 0, .for_gc = 0 | |
587 | }; | |
f1e89c86 RK |
588 | |
589 | return iget5_locked(sb, ino, nilfs_iget_test, nilfs_iget_set, &args); | |
590 | } | |
591 | ||
592 | struct inode *nilfs_iget(struct super_block *sb, struct nilfs_root *root, | |
593 | unsigned long ino) | |
594 | { | |
05fe58fd RK |
595 | struct inode *inode; |
596 | int err; | |
597 | ||
f1e89c86 | 598 | inode = nilfs_iget_locked(sb, root, ino); |
05fe58fd RK |
599 | if (unlikely(!inode)) |
600 | return ERR_PTR(-ENOMEM); | |
601 | if (!(inode->i_state & I_NEW)) | |
602 | return inode; | |
603 | ||
e912a5b6 | 604 | err = __nilfs_read_inode(sb, root, ino, inode); |
05fe58fd RK |
605 | if (unlikely(err)) { |
606 | iget_failed(inode); | |
607 | return ERR_PTR(err); | |
608 | } | |
609 | unlock_new_inode(inode); | |
610 | return inode; | |
611 | } | |
612 | ||
263d90ce RK |
613 | struct inode *nilfs_iget_for_gc(struct super_block *sb, unsigned long ino, |
614 | __u64 cno) | |
615 | { | |
4d8d9293 RK |
616 | struct nilfs_iget_args args = { |
617 | .ino = ino, .root = NULL, .cno = cno, .for_gc = 1 | |
618 | }; | |
263d90ce RK |
619 | struct inode *inode; |
620 | int err; | |
621 | ||
622 | inode = iget5_locked(sb, ino, nilfs_iget_test, nilfs_iget_set, &args); | |
623 | if (unlikely(!inode)) | |
624 | return ERR_PTR(-ENOMEM); | |
625 | if (!(inode->i_state & I_NEW)) | |
626 | return inode; | |
627 | ||
628 | err = nilfs_init_gcinode(inode); | |
629 | if (unlikely(err)) { | |
630 | iget_failed(inode); | |
631 | return ERR_PTR(err); | |
632 | } | |
633 | unlock_new_inode(inode); | |
634 | return inode; | |
635 | } | |
636 | ||
05fe58fd RK |
637 | void nilfs_write_inode_common(struct inode *inode, |
638 | struct nilfs_inode *raw_inode, int has_bmap) | |
639 | { | |
640 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
641 | ||
642 | raw_inode->i_mode = cpu_to_le16(inode->i_mode); | |
305d3d0d EB |
643 | raw_inode->i_uid = cpu_to_le32(i_uid_read(inode)); |
644 | raw_inode->i_gid = cpu_to_le32(i_gid_read(inode)); | |
05fe58fd RK |
645 | raw_inode->i_links_count = cpu_to_le16(inode->i_nlink); |
646 | raw_inode->i_size = cpu_to_le64(inode->i_size); | |
647 | raw_inode->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
648 | raw_inode->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec); | |
61239230 RK |
649 | raw_inode->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); |
650 | raw_inode->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec); | |
05fe58fd RK |
651 | raw_inode->i_blocks = cpu_to_le64(inode->i_blocks); |
652 | ||
05fe58fd RK |
653 | raw_inode->i_flags = cpu_to_le32(ii->i_flags); |
654 | raw_inode->i_generation = cpu_to_le32(inode->i_generation); | |
655 | ||
56eb5538 RK |
656 | if (NILFS_ROOT_METADATA_FILE(inode->i_ino)) { |
657 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; | |
658 | ||
659 | /* zero-fill unused portion in the case of super root block */ | |
660 | raw_inode->i_xattr = 0; | |
661 | raw_inode->i_pad = 0; | |
662 | memset((void *)raw_inode + sizeof(*raw_inode), 0, | |
663 | nilfs->ns_inode_size - sizeof(*raw_inode)); | |
664 | } | |
665 | ||
05fe58fd RK |
666 | if (has_bmap) |
667 | nilfs_bmap_write(ii->i_bmap, raw_inode); | |
668 | else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) | |
669 | raw_inode->i_device_code = | |
cdce214e | 670 | cpu_to_le64(huge_encode_dev(inode->i_rdev)); |
076a378b RK |
671 | /* |
672 | * When extending inode, nilfs->ns_inode_size should be checked | |
673 | * for substitutions of appended fields. | |
674 | */ | |
05fe58fd RK |
675 | } |
676 | ||
b9f66140 | 677 | void nilfs_update_inode(struct inode *inode, struct buffer_head *ibh, int flags) |
05fe58fd RK |
678 | { |
679 | ino_t ino = inode->i_ino; | |
680 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
e912a5b6 | 681 | struct inode *ifile = ii->i_root->ifile; |
05fe58fd RK |
682 | struct nilfs_inode *raw_inode; |
683 | ||
e912a5b6 | 684 | raw_inode = nilfs_ifile_map_inode(ifile, ino, ibh); |
05fe58fd | 685 | |
05fe58fd | 686 | if (test_and_clear_bit(NILFS_I_NEW, &ii->i_state)) |
e912a5b6 | 687 | memset(raw_inode, 0, NILFS_MDT(ifile)->mi_entry_size); |
b9f66140 AR |
688 | if (flags & I_DIRTY_DATASYNC) |
689 | set_bit(NILFS_I_INODE_SYNC, &ii->i_state); | |
05fe58fd RK |
690 | |
691 | nilfs_write_inode_common(inode, raw_inode, 0); | |
076a378b RK |
692 | /* |
693 | * XXX: call with has_bmap = 0 is a workaround to avoid | |
694 | * deadlock of bmap. This delays update of i_bmap to just | |
695 | * before writing. | |
696 | */ | |
697 | ||
e912a5b6 | 698 | nilfs_ifile_unmap_inode(ifile, ino, ibh); |
05fe58fd RK |
699 | } |
700 | ||
701 | #define NILFS_MAX_TRUNCATE_BLOCKS 16384 /* 64MB for 4KB block */ | |
702 | ||
703 | static void nilfs_truncate_bmap(struct nilfs_inode_info *ii, | |
704 | unsigned long from) | |
705 | { | |
3568a13f | 706 | __u64 b; |
05fe58fd RK |
707 | int ret; |
708 | ||
709 | if (!test_bit(NILFS_I_BMAP, &ii->i_state)) | |
710 | return; | |
e828949e | 711 | repeat: |
05fe58fd RK |
712 | ret = nilfs_bmap_last_key(ii->i_bmap, &b); |
713 | if (ret == -ENOENT) | |
714 | return; | |
715 | else if (ret < 0) | |
716 | goto failed; | |
717 | ||
718 | if (b < from) | |
719 | return; | |
720 | ||
3568a13f | 721 | b -= min_t(__u64, NILFS_MAX_TRUNCATE_BLOCKS, b - from); |
05fe58fd RK |
722 | ret = nilfs_bmap_truncate(ii->i_bmap, b); |
723 | nilfs_relax_pressure_in_lock(ii->vfs_inode.i_sb); | |
724 | if (!ret || (ret == -ENOMEM && | |
725 | nilfs_bmap_truncate(ii->i_bmap, b) == 0)) | |
726 | goto repeat; | |
727 | ||
e828949e RK |
728 | failed: |
729 | nilfs_warning(ii->vfs_inode.i_sb, __func__, | |
730 | "failed to truncate bmap (ino=%lu, err=%d)", | |
731 | ii->vfs_inode.i_ino, ret); | |
05fe58fd RK |
732 | } |
733 | ||
734 | void nilfs_truncate(struct inode *inode) | |
735 | { | |
736 | unsigned long blkoff; | |
737 | unsigned int blocksize; | |
738 | struct nilfs_transaction_info ti; | |
739 | struct super_block *sb = inode->i_sb; | |
740 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
05fe58fd RK |
741 | |
742 | if (!test_bit(NILFS_I_BMAP, &ii->i_state)) | |
743 | return; | |
744 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
745 | return; | |
746 | ||
747 | blocksize = sb->s_blocksize; | |
748 | blkoff = (inode->i_size + blocksize - 1) >> sb->s_blocksize_bits; | |
1f5abe7e | 749 | nilfs_transaction_begin(sb, &ti, 0); /* never fails */ |
05fe58fd RK |
750 | |
751 | block_truncate_page(inode->i_mapping, inode->i_size, nilfs_get_block); | |
752 | ||
753 | nilfs_truncate_bmap(ii, blkoff); | |
754 | ||
755 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
756 | if (IS_SYNC(inode)) | |
757 | nilfs_set_transaction_flag(NILFS_TI_SYNC); | |
758 | ||
abdb318b | 759 | nilfs_mark_inode_dirty(inode); |
bcbc8c64 | 760 | nilfs_set_file_dirty(inode, 0); |
47420c79 | 761 | nilfs_transaction_commit(sb); |
076a378b RK |
762 | /* |
763 | * May construct a logical segment and may fail in sync mode. | |
764 | * But truncate has no return value. | |
765 | */ | |
05fe58fd RK |
766 | } |
767 | ||
6fd1e5c9 AV |
768 | static void nilfs_clear_inode(struct inode *inode) |
769 | { | |
770 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
771 | ||
772 | /* | |
773 | * Free resources allocated in nilfs_read_inode(), here. | |
774 | */ | |
775 | BUG_ON(!list_empty(&ii->i_dirty)); | |
776 | brelse(ii->i_bh); | |
777 | ii->i_bh = NULL; | |
778 | ||
2d19961d RK |
779 | if (nilfs_is_metadata_file_inode(inode)) |
780 | nilfs_mdt_clear(inode); | |
518d1a6a | 781 | |
6fd1e5c9 AV |
782 | if (test_bit(NILFS_I_BMAP, &ii->i_state)) |
783 | nilfs_bmap_clear(ii->i_bmap); | |
784 | ||
785 | nilfs_btnode_cache_clear(&ii->i_btnode_cache); | |
4d8d9293 RK |
786 | |
787 | if (ii->i_root && inode->i_ino == NILFS_ROOT_INO) | |
788 | nilfs_put_root(ii->i_root); | |
6fd1e5c9 AV |
789 | } |
790 | ||
791 | void nilfs_evict_inode(struct inode *inode) | |
05fe58fd RK |
792 | { |
793 | struct nilfs_transaction_info ti; | |
794 | struct super_block *sb = inode->i_sb; | |
795 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
25b18d39 | 796 | int ret; |
05fe58fd | 797 | |
4d8d9293 | 798 | if (inode->i_nlink || !ii->i_root || unlikely(is_bad_inode(inode))) { |
91b0abe3 | 799 | truncate_inode_pages_final(&inode->i_data); |
dbd5768f | 800 | clear_inode(inode); |
6fd1e5c9 | 801 | nilfs_clear_inode(inode); |
05fe58fd RK |
802 | return; |
803 | } | |
1f5abe7e RK |
804 | nilfs_transaction_begin(sb, &ti, 0); /* never fails */ |
805 | ||
91b0abe3 | 806 | truncate_inode_pages_final(&inode->i_data); |
05fe58fd | 807 | |
e912a5b6 | 808 | /* TODO: some of the following operations may fail. */ |
05fe58fd | 809 | nilfs_truncate_bmap(ii, 0); |
abdb318b | 810 | nilfs_mark_inode_dirty(inode); |
dbd5768f | 811 | clear_inode(inode); |
e912a5b6 | 812 | |
25b18d39 RK |
813 | ret = nilfs_ifile_delete_inode(ii->i_root->ifile, inode->i_ino); |
814 | if (!ret) | |
e5f7f848 | 815 | atomic64_dec(&ii->i_root->inodes_count); |
e912a5b6 | 816 | |
6fd1e5c9 | 817 | nilfs_clear_inode(inode); |
e912a5b6 | 818 | |
05fe58fd RK |
819 | if (IS_SYNC(inode)) |
820 | nilfs_set_transaction_flag(NILFS_TI_SYNC); | |
47420c79 | 821 | nilfs_transaction_commit(sb); |
076a378b RK |
822 | /* |
823 | * May construct a logical segment and may fail in sync mode. | |
824 | * But delete_inode has no return value. | |
825 | */ | |
05fe58fd RK |
826 | } |
827 | ||
828 | int nilfs_setattr(struct dentry *dentry, struct iattr *iattr) | |
829 | { | |
830 | struct nilfs_transaction_info ti; | |
2b0143b5 | 831 | struct inode *inode = d_inode(dentry); |
05fe58fd | 832 | struct super_block *sb = inode->i_sb; |
47420c79 | 833 | int err; |
05fe58fd RK |
834 | |
835 | err = inode_change_ok(inode, iattr); | |
836 | if (err) | |
837 | return err; | |
838 | ||
839 | err = nilfs_transaction_begin(sb, &ti, 0); | |
840 | if (unlikely(err)) | |
841 | return err; | |
1025774c CH |
842 | |
843 | if ((iattr->ia_valid & ATTR_SIZE) && | |
844 | iattr->ia_size != i_size_read(inode)) { | |
562c72aa | 845 | inode_dio_wait(inode); |
2d1b399b MS |
846 | truncate_setsize(inode, iattr->ia_size); |
847 | nilfs_truncate(inode); | |
1025774c CH |
848 | } |
849 | ||
850 | setattr_copy(inode, iattr); | |
851 | mark_inode_dirty(inode); | |
852 | ||
853 | if (iattr->ia_valid & ATTR_MODE) { | |
05fe58fd | 854 | err = nilfs_acl_chmod(inode); |
1025774c CH |
855 | if (unlikely(err)) |
856 | goto out_err; | |
857 | } | |
858 | ||
859 | return nilfs_transaction_commit(sb); | |
47420c79 | 860 | |
1025774c CH |
861 | out_err: |
862 | nilfs_transaction_abort(sb); | |
47420c79 | 863 | return err; |
05fe58fd RK |
864 | } |
865 | ||
10556cb2 | 866 | int nilfs_permission(struct inode *inode, int mask) |
dc3d3b81 | 867 | { |
730e908f | 868 | struct nilfs_root *root = NILFS_I(inode)->i_root; |
4ad364ca | 869 | |
dc3d3b81 RK |
870 | if ((mask & MAY_WRITE) && root && |
871 | root->cno != NILFS_CPTREE_CURRENT_CNO) | |
872 | return -EROFS; /* snapshot is not writable */ | |
873 | ||
2830ba7f | 874 | return generic_permission(inode, mask); |
dc3d3b81 RK |
875 | } |
876 | ||
bcbc8c64 | 877 | int nilfs_load_inode_block(struct inode *inode, struct buffer_head **pbh) |
05fe58fd | 878 | { |
e3154e97 | 879 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
05fe58fd RK |
880 | struct nilfs_inode_info *ii = NILFS_I(inode); |
881 | int err; | |
882 | ||
693dd321 | 883 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd | 884 | if (ii->i_bh == NULL) { |
693dd321 | 885 | spin_unlock(&nilfs->ns_inode_lock); |
e912a5b6 RK |
886 | err = nilfs_ifile_get_inode_block(ii->i_root->ifile, |
887 | inode->i_ino, pbh); | |
05fe58fd RK |
888 | if (unlikely(err)) |
889 | return err; | |
693dd321 | 890 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd RK |
891 | if (ii->i_bh == NULL) |
892 | ii->i_bh = *pbh; | |
893 | else { | |
894 | brelse(*pbh); | |
895 | *pbh = ii->i_bh; | |
896 | } | |
897 | } else | |
898 | *pbh = ii->i_bh; | |
899 | ||
900 | get_bh(*pbh); | |
693dd321 | 901 | spin_unlock(&nilfs->ns_inode_lock); |
05fe58fd RK |
902 | return 0; |
903 | } | |
904 | ||
905 | int nilfs_inode_dirty(struct inode *inode) | |
906 | { | |
907 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
e3154e97 | 908 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
05fe58fd RK |
909 | int ret = 0; |
910 | ||
911 | if (!list_empty(&ii->i_dirty)) { | |
693dd321 | 912 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd RK |
913 | ret = test_bit(NILFS_I_DIRTY, &ii->i_state) || |
914 | test_bit(NILFS_I_BUSY, &ii->i_state); | |
693dd321 | 915 | spin_unlock(&nilfs->ns_inode_lock); |
05fe58fd RK |
916 | } |
917 | return ret; | |
918 | } | |
919 | ||
0c6c44cb | 920 | int nilfs_set_file_dirty(struct inode *inode, unsigned int nr_dirty) |
05fe58fd RK |
921 | { |
922 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
e3154e97 | 923 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
05fe58fd | 924 | |
693dd321 | 925 | atomic_add(nr_dirty, &nilfs->ns_ndirtyblks); |
05fe58fd | 926 | |
458c5b08 | 927 | if (test_and_set_bit(NILFS_I_DIRTY, &ii->i_state)) |
05fe58fd RK |
928 | return 0; |
929 | ||
693dd321 | 930 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd RK |
931 | if (!test_bit(NILFS_I_QUEUED, &ii->i_state) && |
932 | !test_bit(NILFS_I_BUSY, &ii->i_state)) { | |
076a378b RK |
933 | /* |
934 | * Because this routine may race with nilfs_dispose_list(), | |
935 | * we have to check NILFS_I_QUEUED here, too. | |
936 | */ | |
05fe58fd | 937 | if (list_empty(&ii->i_dirty) && igrab(inode) == NULL) { |
076a378b RK |
938 | /* |
939 | * This will happen when somebody is freeing | |
940 | * this inode. | |
941 | */ | |
693dd321 | 942 | nilfs_warning(inode->i_sb, __func__, |
06f4abf6 | 943 | "cannot get inode (ino=%lu)", |
05fe58fd | 944 | inode->i_ino); |
693dd321 | 945 | spin_unlock(&nilfs->ns_inode_lock); |
076a378b RK |
946 | return -EINVAL; /* |
947 | * NILFS_I_DIRTY may remain for | |
948 | * freeing inode. | |
949 | */ | |
05fe58fd | 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__, | |
06f4abf6 | 966 | "failed to reget inode block."); |
05fe58fd RK |
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__, | |
06f4abf6 | 993 | "tried to mark bad_inode dirty. ignored."); |
05fe58fd RK |
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 | ||
5955102c | 1023 | inode_lock(inode); |
622daaff RK |
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 | ||
5955102c | 1133 | inode_unlock(inode); |
622daaff RK |
1134 | return ret; |
1135 | } |