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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> |
a27bb332 | 29 | #include <linux/aio.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 | |
be667377 RK |
52 | void nilfs_inode_add_blocks(struct inode *inode, int n) |
53 | { | |
54 | struct nilfs_root *root = NILFS_I(inode)->i_root; | |
55 | ||
56 | inode_add_bytes(inode, (1 << inode->i_blkbits) * n); | |
57 | if (root) | |
e5f7f848 | 58 | atomic64_add(n, &root->blocks_count); |
be667377 RK |
59 | } |
60 | ||
61 | void nilfs_inode_sub_blocks(struct inode *inode, int n) | |
62 | { | |
63 | struct nilfs_root *root = NILFS_I(inode)->i_root; | |
64 | ||
65 | inode_sub_bytes(inode, (1 << inode->i_blkbits) * n); | |
66 | if (root) | |
e5f7f848 | 67 | atomic64_sub(n, &root->blocks_count); |
be667377 RK |
68 | } |
69 | ||
05fe58fd RK |
70 | /** |
71 | * nilfs_get_block() - get a file block on the filesystem (callback function) | |
72 | * @inode - inode struct of the target file | |
73 | * @blkoff - file block number | |
74 | * @bh_result - buffer head to be mapped on | |
75 | * @create - indicate whether allocating the block or not when it has not | |
76 | * been allocated yet. | |
77 | * | |
78 | * This function does not issue actual read request of the specified data | |
79 | * block. It is done by VFS. | |
05fe58fd RK |
80 | */ |
81 | int nilfs_get_block(struct inode *inode, sector_t blkoff, | |
82 | struct buffer_head *bh_result, int create) | |
83 | { | |
84 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
0ef28f9a | 85 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
c3a7abf0 | 86 | __u64 blknum = 0; |
05fe58fd | 87 | int err = 0, ret; |
c3a7abf0 | 88 | unsigned maxblocks = bh_result->b_size >> inode->i_blkbits; |
05fe58fd | 89 | |
0ef28f9a | 90 | down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
c3a7abf0 | 91 | ret = nilfs_bmap_lookup_contig(ii->i_bmap, blkoff, &blknum, maxblocks); |
0ef28f9a | 92 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
c3a7abf0 | 93 | if (ret >= 0) { /* found */ |
05fe58fd | 94 | map_bh(bh_result, inode->i_sb, blknum); |
c3a7abf0 RK |
95 | if (ret > 0) |
96 | bh_result->b_size = (ret << inode->i_blkbits); | |
05fe58fd RK |
97 | goto out; |
98 | } | |
05fe58fd RK |
99 | /* data block was not found */ |
100 | if (ret == -ENOENT && create) { | |
101 | struct nilfs_transaction_info ti; | |
102 | ||
103 | bh_result->b_blocknr = 0; | |
104 | err = nilfs_transaction_begin(inode->i_sb, &ti, 1); | |
105 | if (unlikely(err)) | |
106 | goto out; | |
107 | err = nilfs_bmap_insert(ii->i_bmap, (unsigned long)blkoff, | |
108 | (unsigned long)bh_result); | |
05fe58fd RK |
109 | if (unlikely(err != 0)) { |
110 | if (err == -EEXIST) { | |
111 | /* | |
112 | * The get_block() function could be called | |
113 | * from multiple callers for an inode. | |
114 | * However, the page having this block must | |
115 | * be locked in this case. | |
116 | */ | |
1f5abe7e | 117 | printk(KERN_WARNING |
05fe58fd RK |
118 | "nilfs_get_block: a race condition " |
119 | "while inserting a data block. " | |
120 | "(inode number=%lu, file block " | |
121 | "offset=%llu)\n", | |
122 | inode->i_ino, | |
123 | (unsigned long long)blkoff); | |
1f5abe7e | 124 | err = 0; |
05fe58fd | 125 | } |
47420c79 | 126 | nilfs_transaction_abort(inode->i_sb); |
05fe58fd RK |
127 | goto out; |
128 | } | |
abdb318b | 129 | nilfs_mark_inode_dirty(inode); |
47420c79 | 130 | nilfs_transaction_commit(inode->i_sb); /* never fails */ |
05fe58fd RK |
131 | /* Error handling should be detailed */ |
132 | set_buffer_new(bh_result); | |
27e6c7a3 | 133 | set_buffer_delay(bh_result); |
05fe58fd RK |
134 | map_bh(bh_result, inode->i_sb, 0); /* dbn must be changed |
135 | to proper value */ | |
136 | } else if (ret == -ENOENT) { | |
137 | /* not found is not error (e.g. hole); must return without | |
138 | the mapped state flag. */ | |
139 | ; | |
140 | } else { | |
141 | err = ret; | |
142 | } | |
143 | ||
144 | out: | |
145 | return err; | |
146 | } | |
147 | ||
148 | /** | |
149 | * nilfs_readpage() - implement readpage() method of nilfs_aops {} | |
150 | * address_space_operations. | |
151 | * @file - file struct of the file to be read | |
152 | * @page - the page to be read | |
153 | */ | |
154 | static int nilfs_readpage(struct file *file, struct page *page) | |
155 | { | |
156 | return mpage_readpage(page, nilfs_get_block); | |
157 | } | |
158 | ||
159 | /** | |
160 | * nilfs_readpages() - implement readpages() method of nilfs_aops {} | |
161 | * address_space_operations. | |
162 | * @file - file struct of the file to be read | |
163 | * @mapping - address_space struct used for reading multiple pages | |
164 | * @pages - the pages to be read | |
165 | * @nr_pages - number of pages to be read | |
166 | */ | |
167 | static int nilfs_readpages(struct file *file, struct address_space *mapping, | |
168 | struct list_head *pages, unsigned nr_pages) | |
169 | { | |
170 | return mpage_readpages(mapping, pages, nr_pages, nilfs_get_block); | |
171 | } | |
172 | ||
173 | static int nilfs_writepages(struct address_space *mapping, | |
174 | struct writeback_control *wbc) | |
175 | { | |
f30bf3e4 RK |
176 | struct inode *inode = mapping->host; |
177 | int err = 0; | |
178 | ||
8c26c4e2 VD |
179 | if (inode->i_sb->s_flags & MS_RDONLY) { |
180 | nilfs_clear_dirty_pages(mapping, false); | |
181 | return -EROFS; | |
182 | } | |
183 | ||
f30bf3e4 RK |
184 | if (wbc->sync_mode == WB_SYNC_ALL) |
185 | err = nilfs_construct_dsync_segment(inode->i_sb, inode, | |
186 | wbc->range_start, | |
187 | wbc->range_end); | |
188 | return err; | |
05fe58fd RK |
189 | } |
190 | ||
191 | static int nilfs_writepage(struct page *page, struct writeback_control *wbc) | |
192 | { | |
193 | struct inode *inode = page->mapping->host; | |
194 | int err; | |
195 | ||
eb53b6db | 196 | if (inode->i_sb->s_flags & MS_RDONLY) { |
8c26c4e2 VD |
197 | /* |
198 | * It means that filesystem was remounted in read-only | |
199 | * mode because of error or metadata corruption. But we | |
200 | * have dirty pages that try to be flushed in background. | |
201 | * So, here we simply discard this dirty page. | |
202 | */ | |
203 | nilfs_clear_dirty_page(page, false); | |
204 | unlock_page(page); | |
205 | return -EROFS; | |
206 | } | |
207 | ||
05fe58fd RK |
208 | redirty_page_for_writepage(wbc, page); |
209 | unlock_page(page); | |
210 | ||
211 | if (wbc->sync_mode == WB_SYNC_ALL) { | |
212 | err = nilfs_construct_segment(inode->i_sb); | |
213 | if (unlikely(err)) | |
214 | return err; | |
215 | } else if (wbc->for_reclaim) | |
216 | nilfs_flush_segment(inode->i_sb, inode->i_ino); | |
217 | ||
218 | return 0; | |
219 | } | |
220 | ||
221 | static int nilfs_set_page_dirty(struct page *page) | |
222 | { | |
56d7acc7 | 223 | struct inode *inode = page->mapping->host; |
136e8770 | 224 | int ret = __set_page_dirty_nobuffers(page); |
05fe58fd | 225 | |
136e8770 | 226 | if (page_has_buffers(page)) { |
136e8770 RK |
227 | unsigned nr_dirty = 0; |
228 | struct buffer_head *bh, *head; | |
05fe58fd | 229 | |
136e8770 RK |
230 | /* |
231 | * This page is locked by callers, and no other thread | |
232 | * concurrently marks its buffers dirty since they are | |
233 | * only dirtied through routines in fs/buffer.c in | |
234 | * which call sites of mark_buffer_dirty are protected | |
235 | * by page lock. | |
236 | */ | |
237 | bh = head = page_buffers(page); | |
238 | do { | |
239 | /* Do not mark hole blocks dirty */ | |
240 | if (buffer_dirty(bh) || !buffer_mapped(bh)) | |
241 | continue; | |
242 | ||
243 | set_buffer_dirty(bh); | |
244 | nr_dirty++; | |
245 | } while (bh = bh->b_this_page, bh != head); | |
246 | ||
247 | if (nr_dirty) | |
248 | nilfs_set_file_dirty(inode, nr_dirty); | |
56d7acc7 AR |
249 | } else if (ret) { |
250 | unsigned nr_dirty = 1 << (PAGE_CACHE_SHIFT - inode->i_blkbits); | |
251 | ||
252 | nilfs_set_file_dirty(inode, nr_dirty); | |
05fe58fd RK |
253 | } |
254 | return ret; | |
255 | } | |
256 | ||
2d1b399b MS |
257 | void nilfs_write_failed(struct address_space *mapping, loff_t to) |
258 | { | |
259 | struct inode *inode = mapping->host; | |
260 | ||
261 | if (to > inode->i_size) { | |
7caef267 | 262 | truncate_pagecache(inode, inode->i_size); |
2d1b399b MS |
263 | nilfs_truncate(inode); |
264 | } | |
265 | } | |
266 | ||
05fe58fd RK |
267 | static int nilfs_write_begin(struct file *file, struct address_space *mapping, |
268 | loff_t pos, unsigned len, unsigned flags, | |
269 | struct page **pagep, void **fsdata) | |
270 | ||
271 | { | |
272 | struct inode *inode = mapping->host; | |
273 | int err = nilfs_transaction_begin(inode->i_sb, NULL, 1); | |
274 | ||
275 | if (unlikely(err)) | |
276 | return err; | |
277 | ||
155130a4 CH |
278 | err = block_write_begin(mapping, pos, len, flags, pagep, |
279 | nilfs_get_block); | |
280 | if (unlikely(err)) { | |
2d1b399b | 281 | nilfs_write_failed(mapping, pos + len); |
47420c79 | 282 | nilfs_transaction_abort(inode->i_sb); |
155130a4 | 283 | } |
05fe58fd RK |
284 | return err; |
285 | } | |
286 | ||
287 | static int nilfs_write_end(struct file *file, struct address_space *mapping, | |
288 | loff_t pos, unsigned len, unsigned copied, | |
289 | struct page *page, void *fsdata) | |
290 | { | |
291 | struct inode *inode = mapping->host; | |
292 | unsigned start = pos & (PAGE_CACHE_SIZE - 1); | |
293 | unsigned nr_dirty; | |
294 | int err; | |
295 | ||
296 | nr_dirty = nilfs_page_count_clean_buffers(page, start, | |
297 | start + copied); | |
298 | copied = generic_write_end(file, mapping, pos, len, copied, page, | |
299 | fsdata); | |
bcbc8c64 | 300 | nilfs_set_file_dirty(inode, nr_dirty); |
47420c79 | 301 | err = nilfs_transaction_commit(inode->i_sb); |
05fe58fd RK |
302 | return err ? : copied; |
303 | } | |
304 | ||
305 | static ssize_t | |
d8d3d94b AV |
306 | nilfs_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter, |
307 | loff_t offset) | |
05fe58fd RK |
308 | { |
309 | struct file *file = iocb->ki_filp; | |
2d1b399b | 310 | struct address_space *mapping = file->f_mapping; |
05fe58fd | 311 | struct inode *inode = file->f_mapping->host; |
a6cbcd4a | 312 | size_t count = iov_iter_count(iter); |
05fe58fd | 313 | ssize_t size; |
05fe58fd RK |
314 | |
315 | if (rw == WRITE) | |
316 | return 0; | |
317 | ||
318 | /* Needs synchronization with the cleaner */ | |
31b14039 AV |
319 | size = blockdev_direct_IO(rw, iocb, inode, iter, offset, |
320 | 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 | */ | |
326 | if (unlikely((rw & WRITE) && size < 0)) { | |
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 | ||
c6e49e3f | 351 | struct inode *nilfs_new_inode(struct inode *dir, umode_t mode) |
05fe58fd RK |
352 | { |
353 | struct super_block *sb = dir->i_sb; | |
e3154e97 | 354 | struct the_nilfs *nilfs = sb->s_fs_info; |
05fe58fd RK |
355 | struct inode *inode; |
356 | struct nilfs_inode_info *ii; | |
4d8d9293 | 357 | struct nilfs_root *root; |
05fe58fd RK |
358 | int err = -ENOMEM; |
359 | ino_t ino; | |
360 | ||
361 | inode = new_inode(sb); | |
362 | if (unlikely(!inode)) | |
363 | goto failed; | |
364 | ||
365 | mapping_set_gfp_mask(inode->i_mapping, | |
366 | mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS); | |
367 | ||
4d8d9293 | 368 | root = NILFS_I(dir)->i_root; |
05fe58fd RK |
369 | ii = NILFS_I(inode); |
370 | ii->i_state = 1 << NILFS_I_NEW; | |
4d8d9293 | 371 | ii->i_root = root; |
05fe58fd | 372 | |
e912a5b6 | 373 | err = nilfs_ifile_create_inode(root->ifile, &ino, &ii->i_bh); |
05fe58fd RK |
374 | if (unlikely(err)) |
375 | goto failed_ifile_create_inode; | |
376 | /* reference count of i_bh inherits from nilfs_mdt_read_block() */ | |
377 | ||
e5f7f848 | 378 | atomic64_inc(&root->inodes_count); |
73459dcc | 379 | inode_init_owner(inode, dir, mode); |
05fe58fd RK |
380 | inode->i_ino = ino; |
381 | inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; | |
382 | ||
383 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) { | |
384 | err = nilfs_bmap_read(ii->i_bmap, NULL); | |
385 | if (err < 0) | |
386 | goto failed_bmap; | |
387 | ||
388 | set_bit(NILFS_I_BMAP, &ii->i_state); | |
389 | /* No lock is needed; iget() ensures it. */ | |
390 | } | |
391 | ||
b253a3e4 RK |
392 | ii->i_flags = nilfs_mask_flags( |
393 | mode, NILFS_I(dir)->i_flags & NILFS_FL_INHERITED); | |
05fe58fd RK |
394 | |
395 | /* ii->i_file_acl = 0; */ | |
396 | /* ii->i_dir_acl = 0; */ | |
05fe58fd | 397 | ii->i_dir_start_lookup = 0; |
05fe58fd | 398 | nilfs_set_inode_flags(inode); |
9b1fc4e4 RK |
399 | spin_lock(&nilfs->ns_next_gen_lock); |
400 | inode->i_generation = nilfs->ns_next_generation++; | |
401 | spin_unlock(&nilfs->ns_next_gen_lock); | |
05fe58fd RK |
402 | insert_inode_hash(inode); |
403 | ||
404 | err = nilfs_init_acl(inode, dir); | |
405 | if (unlikely(err)) | |
406 | goto failed_acl; /* never occur. When supporting | |
407 | nilfs_init_acl(), proper cancellation of | |
408 | above jobs should be considered */ | |
409 | ||
05fe58fd RK |
410 | return inode; |
411 | ||
412 | failed_acl: | |
413 | failed_bmap: | |
6d6b77f1 | 414 | clear_nlink(inode); |
05fe58fd RK |
415 | iput(inode); /* raw_inode will be deleted through |
416 | generic_delete_inode() */ | |
417 | goto failed; | |
418 | ||
419 | failed_ifile_create_inode: | |
420 | make_bad_inode(inode); | |
421 | iput(inode); /* if i_nlink == 1, generic_forget_inode() will be | |
422 | called */ | |
423 | failed: | |
424 | return ERR_PTR(err); | |
425 | } | |
426 | ||
05fe58fd RK |
427 | void nilfs_set_inode_flags(struct inode *inode) |
428 | { | |
429 | unsigned int flags = NILFS_I(inode)->i_flags; | |
430 | ||
431 | inode->i_flags &= ~(S_SYNC | S_APPEND | S_IMMUTABLE | S_NOATIME | | |
432 | S_DIRSYNC); | |
f0c9f242 | 433 | if (flags & FS_SYNC_FL) |
05fe58fd | 434 | inode->i_flags |= S_SYNC; |
f0c9f242 | 435 | if (flags & FS_APPEND_FL) |
05fe58fd | 436 | inode->i_flags |= S_APPEND; |
f0c9f242 | 437 | if (flags & FS_IMMUTABLE_FL) |
05fe58fd | 438 | inode->i_flags |= S_IMMUTABLE; |
f0c9f242 | 439 | if (flags & FS_NOATIME_FL) |
05fe58fd | 440 | inode->i_flags |= S_NOATIME; |
f0c9f242 | 441 | if (flags & FS_DIRSYNC_FL) |
05fe58fd RK |
442 | inode->i_flags |= S_DIRSYNC; |
443 | mapping_set_gfp_mask(inode->i_mapping, | |
444 | mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS); | |
445 | } | |
446 | ||
447 | int nilfs_read_inode_common(struct inode *inode, | |
448 | struct nilfs_inode *raw_inode) | |
449 | { | |
450 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
451 | int err; | |
452 | ||
453 | inode->i_mode = le16_to_cpu(raw_inode->i_mode); | |
305d3d0d EB |
454 | i_uid_write(inode, le32_to_cpu(raw_inode->i_uid)); |
455 | i_gid_write(inode, le32_to_cpu(raw_inode->i_gid)); | |
bfe86848 | 456 | set_nlink(inode, le16_to_cpu(raw_inode->i_links_count)); |
05fe58fd RK |
457 | inode->i_size = le64_to_cpu(raw_inode->i_size); |
458 | inode->i_atime.tv_sec = le64_to_cpu(raw_inode->i_mtime); | |
459 | inode->i_ctime.tv_sec = le64_to_cpu(raw_inode->i_ctime); | |
460 | inode->i_mtime.tv_sec = le64_to_cpu(raw_inode->i_mtime); | |
61239230 RK |
461 | inode->i_atime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec); |
462 | inode->i_ctime.tv_nsec = le32_to_cpu(raw_inode->i_ctime_nsec); | |
463 | inode->i_mtime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec); | |
464 | if (inode->i_nlink == 0 && inode->i_mode == 0) | |
05fe58fd RK |
465 | return -EINVAL; /* this inode is deleted */ |
466 | ||
467 | inode->i_blocks = le64_to_cpu(raw_inode->i_blocks); | |
468 | ii->i_flags = le32_to_cpu(raw_inode->i_flags); | |
469 | #if 0 | |
470 | ii->i_file_acl = le32_to_cpu(raw_inode->i_file_acl); | |
471 | ii->i_dir_acl = S_ISREG(inode->i_mode) ? | |
472 | 0 : le32_to_cpu(raw_inode->i_dir_acl); | |
473 | #endif | |
3cc811bf | 474 | ii->i_dir_start_lookup = 0; |
05fe58fd RK |
475 | inode->i_generation = le32_to_cpu(raw_inode->i_generation); |
476 | ||
477 | if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
478 | S_ISLNK(inode->i_mode)) { | |
479 | err = nilfs_bmap_read(ii->i_bmap, raw_inode); | |
480 | if (err < 0) | |
481 | return err; | |
482 | set_bit(NILFS_I_BMAP, &ii->i_state); | |
483 | /* No lock is needed; iget() ensures it. */ | |
484 | } | |
485 | return 0; | |
486 | } | |
487 | ||
e912a5b6 RK |
488 | static int __nilfs_read_inode(struct super_block *sb, |
489 | struct nilfs_root *root, unsigned long ino, | |
05fe58fd RK |
490 | struct inode *inode) |
491 | { | |
e3154e97 | 492 | struct the_nilfs *nilfs = sb->s_fs_info; |
05fe58fd RK |
493 | struct buffer_head *bh; |
494 | struct nilfs_inode *raw_inode; | |
495 | int err; | |
496 | ||
365e215c | 497 | down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
e912a5b6 | 498 | err = nilfs_ifile_get_inode_block(root->ifile, ino, &bh); |
05fe58fd RK |
499 | if (unlikely(err)) |
500 | goto bad_inode; | |
501 | ||
e912a5b6 | 502 | raw_inode = nilfs_ifile_map_inode(root->ifile, ino, bh); |
05fe58fd | 503 | |
1b2f5a64 RK |
504 | err = nilfs_read_inode_common(inode, raw_inode); |
505 | if (err) | |
05fe58fd RK |
506 | goto failed_unmap; |
507 | ||
508 | if (S_ISREG(inode->i_mode)) { | |
509 | inode->i_op = &nilfs_file_inode_operations; | |
510 | inode->i_fop = &nilfs_file_operations; | |
511 | inode->i_mapping->a_ops = &nilfs_aops; | |
05fe58fd RK |
512 | } else if (S_ISDIR(inode->i_mode)) { |
513 | inode->i_op = &nilfs_dir_inode_operations; | |
514 | inode->i_fop = &nilfs_dir_operations; | |
515 | inode->i_mapping->a_ops = &nilfs_aops; | |
516 | } else if (S_ISLNK(inode->i_mode)) { | |
517 | inode->i_op = &nilfs_symlink_inode_operations; | |
518 | inode->i_mapping->a_ops = &nilfs_aops; | |
519 | } else { | |
520 | inode->i_op = &nilfs_special_inode_operations; | |
521 | init_special_inode( | |
522 | inode, inode->i_mode, | |
cdce214e | 523 | huge_decode_dev(le64_to_cpu(raw_inode->i_device_code))); |
05fe58fd | 524 | } |
e912a5b6 | 525 | nilfs_ifile_unmap_inode(root->ifile, ino, bh); |
05fe58fd | 526 | brelse(bh); |
365e215c | 527 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
05fe58fd RK |
528 | nilfs_set_inode_flags(inode); |
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)); |
05fe58fd RK |
671 | /* When extending inode, nilfs->ns_inode_size should be checked |
672 | for substitutions of appended fields */ | |
673 | } | |
674 | ||
675 | void nilfs_update_inode(struct inode *inode, struct buffer_head *ibh) | |
676 | { | |
677 | ino_t ino = inode->i_ino; | |
678 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
e912a5b6 | 679 | struct inode *ifile = ii->i_root->ifile; |
05fe58fd RK |
680 | struct nilfs_inode *raw_inode; |
681 | ||
e912a5b6 | 682 | raw_inode = nilfs_ifile_map_inode(ifile, ino, ibh); |
05fe58fd | 683 | |
05fe58fd | 684 | if (test_and_clear_bit(NILFS_I_NEW, &ii->i_state)) |
e912a5b6 | 685 | memset(raw_inode, 0, NILFS_MDT(ifile)->mi_entry_size); |
05fe58fd RK |
686 | set_bit(NILFS_I_INODE_DIRTY, &ii->i_state); |
687 | ||
688 | nilfs_write_inode_common(inode, raw_inode, 0); | |
689 | /* XXX: call with has_bmap = 0 is a workaround to avoid | |
690 | deadlock of bmap. This delays update of i_bmap to just | |
691 | before writing */ | |
e912a5b6 | 692 | nilfs_ifile_unmap_inode(ifile, ino, ibh); |
05fe58fd RK |
693 | } |
694 | ||
695 | #define NILFS_MAX_TRUNCATE_BLOCKS 16384 /* 64MB for 4KB block */ | |
696 | ||
697 | static void nilfs_truncate_bmap(struct nilfs_inode_info *ii, | |
698 | unsigned long from) | |
699 | { | |
700 | unsigned long b; | |
701 | int ret; | |
702 | ||
703 | if (!test_bit(NILFS_I_BMAP, &ii->i_state)) | |
704 | return; | |
e828949e | 705 | repeat: |
05fe58fd RK |
706 | ret = nilfs_bmap_last_key(ii->i_bmap, &b); |
707 | if (ret == -ENOENT) | |
708 | return; | |
709 | else if (ret < 0) | |
710 | goto failed; | |
711 | ||
712 | if (b < from) | |
713 | return; | |
714 | ||
715 | b -= min_t(unsigned long, NILFS_MAX_TRUNCATE_BLOCKS, b - from); | |
716 | ret = nilfs_bmap_truncate(ii->i_bmap, b); | |
717 | nilfs_relax_pressure_in_lock(ii->vfs_inode.i_sb); | |
718 | if (!ret || (ret == -ENOMEM && | |
719 | nilfs_bmap_truncate(ii->i_bmap, b) == 0)) | |
720 | goto repeat; | |
721 | ||
e828949e RK |
722 | failed: |
723 | nilfs_warning(ii->vfs_inode.i_sb, __func__, | |
724 | "failed to truncate bmap (ino=%lu, err=%d)", | |
725 | ii->vfs_inode.i_ino, ret); | |
05fe58fd RK |
726 | } |
727 | ||
728 | void nilfs_truncate(struct inode *inode) | |
729 | { | |
730 | unsigned long blkoff; | |
731 | unsigned int blocksize; | |
732 | struct nilfs_transaction_info ti; | |
733 | struct super_block *sb = inode->i_sb; | |
734 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
05fe58fd RK |
735 | |
736 | if (!test_bit(NILFS_I_BMAP, &ii->i_state)) | |
737 | return; | |
738 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
739 | return; | |
740 | ||
741 | blocksize = sb->s_blocksize; | |
742 | blkoff = (inode->i_size + blocksize - 1) >> sb->s_blocksize_bits; | |
1f5abe7e | 743 | nilfs_transaction_begin(sb, &ti, 0); /* never fails */ |
05fe58fd RK |
744 | |
745 | block_truncate_page(inode->i_mapping, inode->i_size, nilfs_get_block); | |
746 | ||
747 | nilfs_truncate_bmap(ii, blkoff); | |
748 | ||
749 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
750 | if (IS_SYNC(inode)) | |
751 | nilfs_set_transaction_flag(NILFS_TI_SYNC); | |
752 | ||
abdb318b | 753 | nilfs_mark_inode_dirty(inode); |
bcbc8c64 | 754 | nilfs_set_file_dirty(inode, 0); |
47420c79 | 755 | nilfs_transaction_commit(sb); |
05fe58fd RK |
756 | /* May construct a logical segment and may fail in sync mode. |
757 | But truncate has no return value. */ | |
758 | } | |
759 | ||
6fd1e5c9 AV |
760 | static void nilfs_clear_inode(struct inode *inode) |
761 | { | |
762 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
518d1a6a | 763 | struct nilfs_mdt_info *mdi = NILFS_MDT(inode); |
6fd1e5c9 AV |
764 | |
765 | /* | |
766 | * Free resources allocated in nilfs_read_inode(), here. | |
767 | */ | |
768 | BUG_ON(!list_empty(&ii->i_dirty)); | |
769 | brelse(ii->i_bh); | |
770 | ii->i_bh = NULL; | |
771 | ||
518d1a6a RK |
772 | if (mdi && mdi->mi_palloc_cache) |
773 | nilfs_palloc_destroy_cache(inode); | |
774 | ||
6fd1e5c9 AV |
775 | if (test_bit(NILFS_I_BMAP, &ii->i_state)) |
776 | nilfs_bmap_clear(ii->i_bmap); | |
777 | ||
778 | nilfs_btnode_cache_clear(&ii->i_btnode_cache); | |
4d8d9293 RK |
779 | |
780 | if (ii->i_root && inode->i_ino == NILFS_ROOT_INO) | |
781 | nilfs_put_root(ii->i_root); | |
6fd1e5c9 AV |
782 | } |
783 | ||
784 | void nilfs_evict_inode(struct inode *inode) | |
05fe58fd RK |
785 | { |
786 | struct nilfs_transaction_info ti; | |
787 | struct super_block *sb = inode->i_sb; | |
788 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
25b18d39 | 789 | int ret; |
05fe58fd | 790 | |
4d8d9293 | 791 | if (inode->i_nlink || !ii->i_root || unlikely(is_bad_inode(inode))) { |
91b0abe3 | 792 | truncate_inode_pages_final(&inode->i_data); |
dbd5768f | 793 | clear_inode(inode); |
6fd1e5c9 | 794 | nilfs_clear_inode(inode); |
05fe58fd RK |
795 | return; |
796 | } | |
1f5abe7e RK |
797 | nilfs_transaction_begin(sb, &ti, 0); /* never fails */ |
798 | ||
91b0abe3 | 799 | truncate_inode_pages_final(&inode->i_data); |
05fe58fd | 800 | |
e912a5b6 | 801 | /* TODO: some of the following operations may fail. */ |
05fe58fd | 802 | nilfs_truncate_bmap(ii, 0); |
abdb318b | 803 | nilfs_mark_inode_dirty(inode); |
dbd5768f | 804 | clear_inode(inode); |
e912a5b6 | 805 | |
25b18d39 RK |
806 | ret = nilfs_ifile_delete_inode(ii->i_root->ifile, inode->i_ino); |
807 | if (!ret) | |
e5f7f848 | 808 | atomic64_dec(&ii->i_root->inodes_count); |
e912a5b6 | 809 | |
6fd1e5c9 | 810 | nilfs_clear_inode(inode); |
e912a5b6 | 811 | |
05fe58fd RK |
812 | if (IS_SYNC(inode)) |
813 | nilfs_set_transaction_flag(NILFS_TI_SYNC); | |
47420c79 | 814 | nilfs_transaction_commit(sb); |
05fe58fd RK |
815 | /* May construct a logical segment and may fail in sync mode. |
816 | But delete_inode has no return value. */ | |
817 | } | |
818 | ||
819 | int nilfs_setattr(struct dentry *dentry, struct iattr *iattr) | |
820 | { | |
821 | struct nilfs_transaction_info ti; | |
822 | struct inode *inode = dentry->d_inode; | |
823 | struct super_block *sb = inode->i_sb; | |
47420c79 | 824 | int err; |
05fe58fd RK |
825 | |
826 | err = inode_change_ok(inode, iattr); | |
827 | if (err) | |
828 | return err; | |
829 | ||
830 | err = nilfs_transaction_begin(sb, &ti, 0); | |
831 | if (unlikely(err)) | |
832 | return err; | |
1025774c CH |
833 | |
834 | if ((iattr->ia_valid & ATTR_SIZE) && | |
835 | iattr->ia_size != i_size_read(inode)) { | |
562c72aa | 836 | inode_dio_wait(inode); |
2d1b399b MS |
837 | truncate_setsize(inode, iattr->ia_size); |
838 | nilfs_truncate(inode); | |
1025774c CH |
839 | } |
840 | ||
841 | setattr_copy(inode, iattr); | |
842 | mark_inode_dirty(inode); | |
843 | ||
844 | if (iattr->ia_valid & ATTR_MODE) { | |
05fe58fd | 845 | err = nilfs_acl_chmod(inode); |
1025774c CH |
846 | if (unlikely(err)) |
847 | goto out_err; | |
848 | } | |
849 | ||
850 | return nilfs_transaction_commit(sb); | |
47420c79 | 851 | |
1025774c CH |
852 | out_err: |
853 | nilfs_transaction_abort(sb); | |
47420c79 | 854 | return err; |
05fe58fd RK |
855 | } |
856 | ||
10556cb2 | 857 | int nilfs_permission(struct inode *inode, int mask) |
dc3d3b81 | 858 | { |
730e908f | 859 | struct nilfs_root *root = NILFS_I(inode)->i_root; |
dc3d3b81 RK |
860 | if ((mask & MAY_WRITE) && root && |
861 | root->cno != NILFS_CPTREE_CURRENT_CNO) | |
862 | return -EROFS; /* snapshot is not writable */ | |
863 | ||
2830ba7f | 864 | return generic_permission(inode, mask); |
dc3d3b81 RK |
865 | } |
866 | ||
bcbc8c64 | 867 | int nilfs_load_inode_block(struct inode *inode, struct buffer_head **pbh) |
05fe58fd | 868 | { |
e3154e97 | 869 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
05fe58fd RK |
870 | struct nilfs_inode_info *ii = NILFS_I(inode); |
871 | int err; | |
872 | ||
693dd321 | 873 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd | 874 | if (ii->i_bh == NULL) { |
693dd321 | 875 | spin_unlock(&nilfs->ns_inode_lock); |
e912a5b6 RK |
876 | err = nilfs_ifile_get_inode_block(ii->i_root->ifile, |
877 | inode->i_ino, pbh); | |
05fe58fd RK |
878 | if (unlikely(err)) |
879 | return err; | |
693dd321 | 880 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd RK |
881 | if (ii->i_bh == NULL) |
882 | ii->i_bh = *pbh; | |
883 | else { | |
884 | brelse(*pbh); | |
885 | *pbh = ii->i_bh; | |
886 | } | |
887 | } else | |
888 | *pbh = ii->i_bh; | |
889 | ||
890 | get_bh(*pbh); | |
693dd321 | 891 | spin_unlock(&nilfs->ns_inode_lock); |
05fe58fd RK |
892 | return 0; |
893 | } | |
894 | ||
895 | int nilfs_inode_dirty(struct inode *inode) | |
896 | { | |
897 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
e3154e97 | 898 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
05fe58fd RK |
899 | int ret = 0; |
900 | ||
901 | if (!list_empty(&ii->i_dirty)) { | |
693dd321 | 902 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd RK |
903 | ret = test_bit(NILFS_I_DIRTY, &ii->i_state) || |
904 | test_bit(NILFS_I_BUSY, &ii->i_state); | |
693dd321 | 905 | spin_unlock(&nilfs->ns_inode_lock); |
05fe58fd RK |
906 | } |
907 | return ret; | |
908 | } | |
909 | ||
bcbc8c64 | 910 | int nilfs_set_file_dirty(struct inode *inode, unsigned nr_dirty) |
05fe58fd RK |
911 | { |
912 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
e3154e97 | 913 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
05fe58fd | 914 | |
693dd321 | 915 | atomic_add(nr_dirty, &nilfs->ns_ndirtyblks); |
05fe58fd | 916 | |
458c5b08 | 917 | if (test_and_set_bit(NILFS_I_DIRTY, &ii->i_state)) |
05fe58fd RK |
918 | return 0; |
919 | ||
693dd321 | 920 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd RK |
921 | if (!test_bit(NILFS_I_QUEUED, &ii->i_state) && |
922 | !test_bit(NILFS_I_BUSY, &ii->i_state)) { | |
923 | /* Because this routine may race with nilfs_dispose_list(), | |
924 | we have to check NILFS_I_QUEUED here, too. */ | |
925 | if (list_empty(&ii->i_dirty) && igrab(inode) == NULL) { | |
926 | /* This will happen when somebody is freeing | |
927 | this inode. */ | |
693dd321 | 928 | nilfs_warning(inode->i_sb, __func__, |
05fe58fd RK |
929 | "cannot get inode (ino=%lu)\n", |
930 | inode->i_ino); | |
693dd321 | 931 | spin_unlock(&nilfs->ns_inode_lock); |
05fe58fd RK |
932 | return -EINVAL; /* NILFS_I_DIRTY may remain for |
933 | freeing inode */ | |
934 | } | |
eaae0f37 | 935 | list_move_tail(&ii->i_dirty, &nilfs->ns_dirty_files); |
05fe58fd RK |
936 | set_bit(NILFS_I_QUEUED, &ii->i_state); |
937 | } | |
693dd321 | 938 | spin_unlock(&nilfs->ns_inode_lock); |
05fe58fd RK |
939 | return 0; |
940 | } | |
941 | ||
942 | int nilfs_mark_inode_dirty(struct inode *inode) | |
943 | { | |
05fe58fd RK |
944 | struct buffer_head *ibh; |
945 | int err; | |
946 | ||
bcbc8c64 | 947 | err = nilfs_load_inode_block(inode, &ibh); |
05fe58fd RK |
948 | if (unlikely(err)) { |
949 | nilfs_warning(inode->i_sb, __func__, | |
950 | "failed to reget inode block.\n"); | |
951 | return err; | |
952 | } | |
05fe58fd | 953 | nilfs_update_inode(inode, ibh); |
5fc7b141 | 954 | mark_buffer_dirty(ibh); |
e912a5b6 | 955 | nilfs_mdt_mark_dirty(NILFS_I(inode)->i_root->ifile); |
05fe58fd RK |
956 | brelse(ibh); |
957 | return 0; | |
958 | } | |
959 | ||
960 | /** | |
961 | * nilfs_dirty_inode - reflect changes on given inode to an inode block. | |
962 | * @inode: inode of the file to be registered. | |
963 | * | |
964 | * nilfs_dirty_inode() loads a inode block containing the specified | |
965 | * @inode and copies data from a nilfs_inode to a corresponding inode | |
966 | * entry in the inode block. This operation is excluded from the segment | |
967 | * construction. This function can be called both as a single operation | |
968 | * and as a part of indivisible file operations. | |
969 | */ | |
aa385729 | 970 | void nilfs_dirty_inode(struct inode *inode, int flags) |
05fe58fd RK |
971 | { |
972 | struct nilfs_transaction_info ti; | |
7d6cd92f | 973 | struct nilfs_mdt_info *mdi = NILFS_MDT(inode); |
05fe58fd RK |
974 | |
975 | if (is_bad_inode(inode)) { | |
976 | nilfs_warning(inode->i_sb, __func__, | |
977 | "tried to mark bad_inode dirty. ignored.\n"); | |
978 | dump_stack(); | |
979 | return; | |
980 | } | |
7d6cd92f RK |
981 | if (mdi) { |
982 | nilfs_mdt_mark_dirty(inode); | |
983 | return; | |
984 | } | |
05fe58fd | 985 | nilfs_transaction_begin(inode->i_sb, &ti, 0); |
458c5b08 | 986 | nilfs_mark_inode_dirty(inode); |
47420c79 | 987 | nilfs_transaction_commit(inode->i_sb); /* never fails */ |
05fe58fd | 988 | } |
622daaff RK |
989 | |
990 | int nilfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, | |
991 | __u64 start, __u64 len) | |
992 | { | |
0ef28f9a | 993 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
622daaff RK |
994 | __u64 logical = 0, phys = 0, size = 0; |
995 | __u32 flags = 0; | |
996 | loff_t isize; | |
997 | sector_t blkoff, end_blkoff; | |
998 | sector_t delalloc_blkoff; | |
999 | unsigned long delalloc_blklen; | |
1000 | unsigned int blkbits = inode->i_blkbits; | |
1001 | int ret, n; | |
1002 | ||
1003 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
1004 | if (ret) | |
1005 | return ret; | |
1006 | ||
1007 | mutex_lock(&inode->i_mutex); | |
1008 | ||
1009 | isize = i_size_read(inode); | |
1010 | ||
1011 | blkoff = start >> blkbits; | |
1012 | end_blkoff = (start + len - 1) >> blkbits; | |
1013 | ||
1014 | delalloc_blklen = nilfs_find_uncommitted_extent(inode, blkoff, | |
1015 | &delalloc_blkoff); | |
1016 | ||
1017 | do { | |
1018 | __u64 blkphy; | |
1019 | unsigned int maxblocks; | |
1020 | ||
1021 | if (delalloc_blklen && blkoff == delalloc_blkoff) { | |
1022 | if (size) { | |
1023 | /* End of the current extent */ | |
1024 | ret = fiemap_fill_next_extent( | |
1025 | fieinfo, logical, phys, size, flags); | |
1026 | if (ret) | |
1027 | break; | |
1028 | } | |
1029 | if (blkoff > end_blkoff) | |
1030 | break; | |
1031 | ||
1032 | flags = FIEMAP_EXTENT_MERGED | FIEMAP_EXTENT_DELALLOC; | |
1033 | logical = blkoff << blkbits; | |
1034 | phys = 0; | |
1035 | size = delalloc_blklen << blkbits; | |
1036 | ||
1037 | blkoff = delalloc_blkoff + delalloc_blklen; | |
1038 | delalloc_blklen = nilfs_find_uncommitted_extent( | |
1039 | inode, blkoff, &delalloc_blkoff); | |
1040 | continue; | |
1041 | } | |
1042 | ||
1043 | /* | |
1044 | * Limit the number of blocks that we look up so as | |
1045 | * not to get into the next delayed allocation extent. | |
1046 | */ | |
1047 | maxblocks = INT_MAX; | |
1048 | if (delalloc_blklen) | |
1049 | maxblocks = min_t(sector_t, delalloc_blkoff - blkoff, | |
1050 | maxblocks); | |
1051 | blkphy = 0; | |
1052 | ||
1053 | down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); | |
1054 | n = nilfs_bmap_lookup_contig( | |
1055 | NILFS_I(inode)->i_bmap, blkoff, &blkphy, maxblocks); | |
1056 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); | |
1057 | ||
1058 | if (n < 0) { | |
1059 | int past_eof; | |
1060 | ||
1061 | if (unlikely(n != -ENOENT)) | |
1062 | break; /* error */ | |
1063 | ||
1064 | /* HOLE */ | |
1065 | blkoff++; | |
1066 | past_eof = ((blkoff << blkbits) >= isize); | |
1067 | ||
1068 | if (size) { | |
1069 | /* End of the current extent */ | |
1070 | ||
1071 | if (past_eof) | |
1072 | flags |= FIEMAP_EXTENT_LAST; | |
1073 | ||
1074 | ret = fiemap_fill_next_extent( | |
1075 | fieinfo, logical, phys, size, flags); | |
1076 | if (ret) | |
1077 | break; | |
1078 | size = 0; | |
1079 | } | |
1080 | if (blkoff > end_blkoff || past_eof) | |
1081 | break; | |
1082 | } else { | |
1083 | if (size) { | |
1084 | if (phys && blkphy << blkbits == phys + size) { | |
1085 | /* The current extent goes on */ | |
1086 | size += n << blkbits; | |
1087 | } else { | |
1088 | /* Terminate the current extent */ | |
1089 | ret = fiemap_fill_next_extent( | |
1090 | fieinfo, logical, phys, size, | |
1091 | flags); | |
1092 | if (ret || blkoff > end_blkoff) | |
1093 | break; | |
1094 | ||
1095 | /* Start another extent */ | |
1096 | flags = FIEMAP_EXTENT_MERGED; | |
1097 | logical = blkoff << blkbits; | |
1098 | phys = blkphy << blkbits; | |
1099 | size = n << blkbits; | |
1100 | } | |
1101 | } else { | |
1102 | /* Start a new extent */ | |
1103 | flags = FIEMAP_EXTENT_MERGED; | |
1104 | logical = blkoff << blkbits; | |
1105 | phys = blkphy << blkbits; | |
1106 | size = n << blkbits; | |
1107 | } | |
1108 | blkoff += n; | |
1109 | } | |
1110 | cond_resched(); | |
1111 | } while (true); | |
1112 | ||
1113 | /* If ret is 1 then we just hit the end of the extent array */ | |
1114 | if (ret == 1) | |
1115 | ret = 0; | |
1116 | ||
1117 | mutex_unlock(&inode->i_mutex); | |
1118 | return ret; | |
1119 | } |