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 | 251 | } else if (ret) { |
09cbfeaf | 252 | unsigned nr_dirty = 1 << (PAGE_SHIFT - inode->i_blkbits); |
56d7acc7 AR |
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; | |
09cbfeaf | 294 | unsigned start = pos & (PAGE_SIZE - 1); |
05fe58fd RK |
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 | |
c8b8e32d | 308 | nilfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
05fe58fd | 309 | { |
6b6dabc8 | 310 | struct inode *inode = file_inode(iocb->ki_filp); |
05fe58fd | 311 | |
6f673763 | 312 | if (iov_iter_rw(iter) == WRITE) |
05fe58fd RK |
313 | return 0; |
314 | ||
315 | /* Needs synchronization with the cleaner */ | |
c8b8e32d | 316 | return blockdev_direct_IO(iocb, inode, iter, nilfs_get_block); |
05fe58fd RK |
317 | } |
318 | ||
7f09410b | 319 | const struct address_space_operations nilfs_aops = { |
05fe58fd RK |
320 | .writepage = nilfs_writepage, |
321 | .readpage = nilfs_readpage, | |
05fe58fd RK |
322 | .writepages = nilfs_writepages, |
323 | .set_page_dirty = nilfs_set_page_dirty, | |
324 | .readpages = nilfs_readpages, | |
325 | .write_begin = nilfs_write_begin, | |
326 | .write_end = nilfs_write_end, | |
327 | /* .releasepage = nilfs_releasepage, */ | |
328 | .invalidatepage = block_invalidatepage, | |
329 | .direct_IO = nilfs_direct_IO, | |
258ef67e | 330 | .is_partially_uptodate = block_is_partially_uptodate, |
05fe58fd RK |
331 | }; |
332 | ||
705304a8 RK |
333 | static int nilfs_insert_inode_locked(struct inode *inode, |
334 | struct nilfs_root *root, | |
335 | unsigned long ino) | |
336 | { | |
337 | struct nilfs_iget_args args = { | |
338 | .ino = ino, .root = root, .cno = 0, .for_gc = 0 | |
339 | }; | |
340 | ||
341 | return insert_inode_locked4(inode, ino, nilfs_iget_test, &args); | |
342 | } | |
343 | ||
c6e49e3f | 344 | struct inode *nilfs_new_inode(struct inode *dir, umode_t mode) |
05fe58fd RK |
345 | { |
346 | struct super_block *sb = dir->i_sb; | |
e3154e97 | 347 | struct the_nilfs *nilfs = sb->s_fs_info; |
05fe58fd RK |
348 | struct inode *inode; |
349 | struct nilfs_inode_info *ii; | |
4d8d9293 | 350 | struct nilfs_root *root; |
05fe58fd RK |
351 | int err = -ENOMEM; |
352 | ino_t ino; | |
353 | ||
354 | inode = new_inode(sb); | |
355 | if (unlikely(!inode)) | |
356 | goto failed; | |
357 | ||
358 | mapping_set_gfp_mask(inode->i_mapping, | |
c62d2555 | 359 | mapping_gfp_constraint(inode->i_mapping, ~__GFP_FS)); |
05fe58fd | 360 | |
4d8d9293 | 361 | root = NILFS_I(dir)->i_root; |
05fe58fd RK |
362 | ii = NILFS_I(inode); |
363 | ii->i_state = 1 << NILFS_I_NEW; | |
4d8d9293 | 364 | ii->i_root = root; |
05fe58fd | 365 | |
e912a5b6 | 366 | err = nilfs_ifile_create_inode(root->ifile, &ino, &ii->i_bh); |
05fe58fd RK |
367 | if (unlikely(err)) |
368 | goto failed_ifile_create_inode; | |
369 | /* reference count of i_bh inherits from nilfs_mdt_read_block() */ | |
370 | ||
e5f7f848 | 371 | atomic64_inc(&root->inodes_count); |
73459dcc | 372 | inode_init_owner(inode, dir, mode); |
05fe58fd RK |
373 | inode->i_ino = ino; |
374 | inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; | |
375 | ||
376 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) { | |
377 | err = nilfs_bmap_read(ii->i_bmap, NULL); | |
378 | if (err < 0) | |
705304a8 | 379 | goto failed_after_creation; |
05fe58fd RK |
380 | |
381 | set_bit(NILFS_I_BMAP, &ii->i_state); | |
382 | /* No lock is needed; iget() ensures it. */ | |
383 | } | |
384 | ||
b253a3e4 RK |
385 | ii->i_flags = nilfs_mask_flags( |
386 | mode, NILFS_I(dir)->i_flags & NILFS_FL_INHERITED); | |
05fe58fd RK |
387 | |
388 | /* ii->i_file_acl = 0; */ | |
389 | /* ii->i_dir_acl = 0; */ | |
05fe58fd | 390 | ii->i_dir_start_lookup = 0; |
05fe58fd | 391 | nilfs_set_inode_flags(inode); |
9b1fc4e4 RK |
392 | spin_lock(&nilfs->ns_next_gen_lock); |
393 | inode->i_generation = nilfs->ns_next_generation++; | |
394 | spin_unlock(&nilfs->ns_next_gen_lock); | |
705304a8 RK |
395 | if (nilfs_insert_inode_locked(inode, root, ino) < 0) { |
396 | err = -EIO; | |
397 | goto failed_after_creation; | |
398 | } | |
05fe58fd RK |
399 | |
400 | err = nilfs_init_acl(inode, dir); | |
401 | if (unlikely(err)) | |
705304a8 | 402 | goto failed_after_creation; /* never occur. When supporting |
05fe58fd RK |
403 | nilfs_init_acl(), proper cancellation of |
404 | above jobs should be considered */ | |
405 | ||
05fe58fd RK |
406 | return inode; |
407 | ||
705304a8 | 408 | failed_after_creation: |
6d6b77f1 | 409 | clear_nlink(inode); |
705304a8 | 410 | unlock_new_inode(inode); |
05fe58fd | 411 | iput(inode); /* raw_inode will be deleted through |
705304a8 | 412 | nilfs_evict_inode() */ |
05fe58fd RK |
413 | goto failed; |
414 | ||
415 | failed_ifile_create_inode: | |
416 | make_bad_inode(inode); | |
417 | iput(inode); /* if i_nlink == 1, generic_forget_inode() will be | |
418 | called */ | |
419 | failed: | |
420 | return ERR_PTR(err); | |
421 | } | |
422 | ||
05fe58fd RK |
423 | void nilfs_set_inode_flags(struct inode *inode) |
424 | { | |
425 | unsigned int flags = NILFS_I(inode)->i_flags; | |
faea2c53 | 426 | unsigned int new_fl = 0; |
05fe58fd | 427 | |
f0c9f242 | 428 | if (flags & FS_SYNC_FL) |
faea2c53 | 429 | new_fl |= S_SYNC; |
f0c9f242 | 430 | if (flags & FS_APPEND_FL) |
faea2c53 | 431 | new_fl |= S_APPEND; |
f0c9f242 | 432 | if (flags & FS_IMMUTABLE_FL) |
faea2c53 | 433 | new_fl |= S_IMMUTABLE; |
f0c9f242 | 434 | if (flags & FS_NOATIME_FL) |
faea2c53 | 435 | new_fl |= S_NOATIME; |
f0c9f242 | 436 | if (flags & FS_DIRSYNC_FL) |
faea2c53 RK |
437 | new_fl |= S_DIRSYNC; |
438 | inode_set_flags(inode, new_fl, S_SYNC | S_APPEND | S_IMMUTABLE | | |
439 | S_NOATIME | S_DIRSYNC); | |
05fe58fd RK |
440 | } |
441 | ||
442 | int nilfs_read_inode_common(struct inode *inode, | |
443 | struct nilfs_inode *raw_inode) | |
444 | { | |
445 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
446 | int err; | |
447 | ||
448 | inode->i_mode = le16_to_cpu(raw_inode->i_mode); | |
305d3d0d EB |
449 | i_uid_write(inode, le32_to_cpu(raw_inode->i_uid)); |
450 | i_gid_write(inode, le32_to_cpu(raw_inode->i_gid)); | |
bfe86848 | 451 | set_nlink(inode, le16_to_cpu(raw_inode->i_links_count)); |
05fe58fd RK |
452 | inode->i_size = le64_to_cpu(raw_inode->i_size); |
453 | inode->i_atime.tv_sec = le64_to_cpu(raw_inode->i_mtime); | |
454 | inode->i_ctime.tv_sec = le64_to_cpu(raw_inode->i_ctime); | |
455 | inode->i_mtime.tv_sec = le64_to_cpu(raw_inode->i_mtime); | |
61239230 RK |
456 | inode->i_atime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec); |
457 | inode->i_ctime.tv_nsec = le32_to_cpu(raw_inode->i_ctime_nsec); | |
458 | inode->i_mtime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec); | |
705304a8 RK |
459 | if (inode->i_nlink == 0) |
460 | return -ESTALE; /* this inode is deleted */ | |
05fe58fd RK |
461 | |
462 | inode->i_blocks = le64_to_cpu(raw_inode->i_blocks); | |
463 | ii->i_flags = le32_to_cpu(raw_inode->i_flags); | |
464 | #if 0 | |
465 | ii->i_file_acl = le32_to_cpu(raw_inode->i_file_acl); | |
466 | ii->i_dir_acl = S_ISREG(inode->i_mode) ? | |
467 | 0 : le32_to_cpu(raw_inode->i_dir_acl); | |
468 | #endif | |
3cc811bf | 469 | ii->i_dir_start_lookup = 0; |
05fe58fd RK |
470 | inode->i_generation = le32_to_cpu(raw_inode->i_generation); |
471 | ||
472 | if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
473 | S_ISLNK(inode->i_mode)) { | |
474 | err = nilfs_bmap_read(ii->i_bmap, raw_inode); | |
475 | if (err < 0) | |
476 | return err; | |
477 | set_bit(NILFS_I_BMAP, &ii->i_state); | |
478 | /* No lock is needed; iget() ensures it. */ | |
479 | } | |
480 | return 0; | |
481 | } | |
482 | ||
e912a5b6 RK |
483 | static int __nilfs_read_inode(struct super_block *sb, |
484 | struct nilfs_root *root, unsigned long ino, | |
05fe58fd RK |
485 | struct inode *inode) |
486 | { | |
e3154e97 | 487 | struct the_nilfs *nilfs = sb->s_fs_info; |
05fe58fd RK |
488 | struct buffer_head *bh; |
489 | struct nilfs_inode *raw_inode; | |
490 | int err; | |
491 | ||
365e215c | 492 | down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
e912a5b6 | 493 | err = nilfs_ifile_get_inode_block(root->ifile, ino, &bh); |
05fe58fd RK |
494 | if (unlikely(err)) |
495 | goto bad_inode; | |
496 | ||
e912a5b6 | 497 | raw_inode = nilfs_ifile_map_inode(root->ifile, ino, bh); |
05fe58fd | 498 | |
1b2f5a64 RK |
499 | err = nilfs_read_inode_common(inode, raw_inode); |
500 | if (err) | |
05fe58fd RK |
501 | goto failed_unmap; |
502 | ||
503 | if (S_ISREG(inode->i_mode)) { | |
504 | inode->i_op = &nilfs_file_inode_operations; | |
505 | inode->i_fop = &nilfs_file_operations; | |
506 | inode->i_mapping->a_ops = &nilfs_aops; | |
05fe58fd RK |
507 | } else if (S_ISDIR(inode->i_mode)) { |
508 | inode->i_op = &nilfs_dir_inode_operations; | |
509 | inode->i_fop = &nilfs_dir_operations; | |
510 | inode->i_mapping->a_ops = &nilfs_aops; | |
511 | } else if (S_ISLNK(inode->i_mode)) { | |
512 | inode->i_op = &nilfs_symlink_inode_operations; | |
21fc61c7 | 513 | inode_nohighmem(inode); |
05fe58fd RK |
514 | inode->i_mapping->a_ops = &nilfs_aops; |
515 | } else { | |
516 | inode->i_op = &nilfs_special_inode_operations; | |
517 | init_special_inode( | |
518 | inode, inode->i_mode, | |
cdce214e | 519 | huge_decode_dev(le64_to_cpu(raw_inode->i_device_code))); |
05fe58fd | 520 | } |
e912a5b6 | 521 | nilfs_ifile_unmap_inode(root->ifile, ino, bh); |
05fe58fd | 522 | brelse(bh); |
365e215c | 523 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
05fe58fd | 524 | nilfs_set_inode_flags(inode); |
0ce187c4 | 525 | mapping_set_gfp_mask(inode->i_mapping, |
c62d2555 | 526 | mapping_gfp_constraint(inode->i_mapping, ~__GFP_FS)); |
05fe58fd RK |
527 | return 0; |
528 | ||
529 | failed_unmap: | |
e912a5b6 | 530 | nilfs_ifile_unmap_inode(root->ifile, ino, bh); |
05fe58fd RK |
531 | brelse(bh); |
532 | ||
533 | bad_inode: | |
365e215c | 534 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
05fe58fd RK |
535 | return err; |
536 | } | |
537 | ||
0e14a359 RK |
538 | static int nilfs_iget_test(struct inode *inode, void *opaque) |
539 | { | |
540 | struct nilfs_iget_args *args = opaque; | |
541 | struct nilfs_inode_info *ii; | |
542 | ||
4d8d9293 | 543 | if (args->ino != inode->i_ino || args->root != NILFS_I(inode)->i_root) |
0e14a359 RK |
544 | return 0; |
545 | ||
546 | ii = NILFS_I(inode); | |
547 | if (!test_bit(NILFS_I_GCINODE, &ii->i_state)) | |
548 | return !args->for_gc; | |
549 | ||
550 | return args->for_gc && args->cno == ii->i_cno; | |
551 | } | |
552 | ||
553 | static int nilfs_iget_set(struct inode *inode, void *opaque) | |
554 | { | |
555 | struct nilfs_iget_args *args = opaque; | |
556 | ||
557 | inode->i_ino = args->ino; | |
558 | if (args->for_gc) { | |
559 | NILFS_I(inode)->i_state = 1 << NILFS_I_GCINODE; | |
560 | NILFS_I(inode)->i_cno = args->cno; | |
4d8d9293 RK |
561 | NILFS_I(inode)->i_root = NULL; |
562 | } else { | |
563 | if (args->root && args->ino == NILFS_ROOT_INO) | |
564 | nilfs_get_root(args->root); | |
565 | NILFS_I(inode)->i_root = args->root; | |
0e14a359 RK |
566 | } |
567 | return 0; | |
568 | } | |
569 | ||
032dbb3b RK |
570 | struct inode *nilfs_ilookup(struct super_block *sb, struct nilfs_root *root, |
571 | unsigned long ino) | |
572 | { | |
573 | struct nilfs_iget_args args = { | |
574 | .ino = ino, .root = root, .cno = 0, .for_gc = 0 | |
575 | }; | |
576 | ||
577 | return ilookup5(sb, ino, nilfs_iget_test, &args); | |
578 | } | |
579 | ||
f1e89c86 RK |
580 | struct inode *nilfs_iget_locked(struct super_block *sb, struct nilfs_root *root, |
581 | unsigned long ino) | |
05fe58fd | 582 | { |
4d8d9293 RK |
583 | struct nilfs_iget_args args = { |
584 | .ino = ino, .root = root, .cno = 0, .for_gc = 0 | |
585 | }; | |
f1e89c86 RK |
586 | |
587 | return iget5_locked(sb, ino, nilfs_iget_test, nilfs_iget_set, &args); | |
588 | } | |
589 | ||
590 | struct inode *nilfs_iget(struct super_block *sb, struct nilfs_root *root, | |
591 | unsigned long ino) | |
592 | { | |
05fe58fd RK |
593 | struct inode *inode; |
594 | int err; | |
595 | ||
f1e89c86 | 596 | inode = nilfs_iget_locked(sb, root, ino); |
05fe58fd RK |
597 | if (unlikely(!inode)) |
598 | return ERR_PTR(-ENOMEM); | |
599 | if (!(inode->i_state & I_NEW)) | |
600 | return inode; | |
601 | ||
e912a5b6 | 602 | err = __nilfs_read_inode(sb, root, ino, inode); |
05fe58fd RK |
603 | if (unlikely(err)) { |
604 | iget_failed(inode); | |
605 | return ERR_PTR(err); | |
606 | } | |
607 | unlock_new_inode(inode); | |
608 | return inode; | |
609 | } | |
610 | ||
263d90ce RK |
611 | struct inode *nilfs_iget_for_gc(struct super_block *sb, unsigned long ino, |
612 | __u64 cno) | |
613 | { | |
4d8d9293 RK |
614 | struct nilfs_iget_args args = { |
615 | .ino = ino, .root = NULL, .cno = cno, .for_gc = 1 | |
616 | }; | |
263d90ce RK |
617 | struct inode *inode; |
618 | int err; | |
619 | ||
620 | inode = iget5_locked(sb, ino, nilfs_iget_test, nilfs_iget_set, &args); | |
621 | if (unlikely(!inode)) | |
622 | return ERR_PTR(-ENOMEM); | |
623 | if (!(inode->i_state & I_NEW)) | |
624 | return inode; | |
625 | ||
626 | err = nilfs_init_gcinode(inode); | |
627 | if (unlikely(err)) { | |
628 | iget_failed(inode); | |
629 | return ERR_PTR(err); | |
630 | } | |
631 | unlock_new_inode(inode); | |
632 | return inode; | |
633 | } | |
634 | ||
05fe58fd RK |
635 | void nilfs_write_inode_common(struct inode *inode, |
636 | struct nilfs_inode *raw_inode, int has_bmap) | |
637 | { | |
638 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
639 | ||
640 | raw_inode->i_mode = cpu_to_le16(inode->i_mode); | |
305d3d0d EB |
641 | raw_inode->i_uid = cpu_to_le32(i_uid_read(inode)); |
642 | raw_inode->i_gid = cpu_to_le32(i_gid_read(inode)); | |
05fe58fd RK |
643 | raw_inode->i_links_count = cpu_to_le16(inode->i_nlink); |
644 | raw_inode->i_size = cpu_to_le64(inode->i_size); | |
645 | raw_inode->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
646 | raw_inode->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec); | |
61239230 RK |
647 | raw_inode->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); |
648 | raw_inode->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec); | |
05fe58fd RK |
649 | raw_inode->i_blocks = cpu_to_le64(inode->i_blocks); |
650 | ||
05fe58fd RK |
651 | raw_inode->i_flags = cpu_to_le32(ii->i_flags); |
652 | raw_inode->i_generation = cpu_to_le32(inode->i_generation); | |
653 | ||
56eb5538 RK |
654 | if (NILFS_ROOT_METADATA_FILE(inode->i_ino)) { |
655 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; | |
656 | ||
657 | /* zero-fill unused portion in the case of super root block */ | |
658 | raw_inode->i_xattr = 0; | |
659 | raw_inode->i_pad = 0; | |
660 | memset((void *)raw_inode + sizeof(*raw_inode), 0, | |
661 | nilfs->ns_inode_size - sizeof(*raw_inode)); | |
662 | } | |
663 | ||
05fe58fd RK |
664 | if (has_bmap) |
665 | nilfs_bmap_write(ii->i_bmap, raw_inode); | |
666 | else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) | |
667 | raw_inode->i_device_code = | |
cdce214e | 668 | cpu_to_le64(huge_encode_dev(inode->i_rdev)); |
05fe58fd RK |
669 | /* When extending inode, nilfs->ns_inode_size should be checked |
670 | for substitutions of appended fields */ | |
671 | } | |
672 | ||
b9f66140 | 673 | void nilfs_update_inode(struct inode *inode, struct buffer_head *ibh, int flags) |
05fe58fd RK |
674 | { |
675 | ino_t ino = inode->i_ino; | |
676 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
e912a5b6 | 677 | struct inode *ifile = ii->i_root->ifile; |
05fe58fd RK |
678 | struct nilfs_inode *raw_inode; |
679 | ||
e912a5b6 | 680 | raw_inode = nilfs_ifile_map_inode(ifile, ino, ibh); |
05fe58fd | 681 | |
05fe58fd | 682 | if (test_and_clear_bit(NILFS_I_NEW, &ii->i_state)) |
e912a5b6 | 683 | memset(raw_inode, 0, NILFS_MDT(ifile)->mi_entry_size); |
b9f66140 AR |
684 | if (flags & I_DIRTY_DATASYNC) |
685 | set_bit(NILFS_I_INODE_SYNC, &ii->i_state); | |
05fe58fd RK |
686 | |
687 | nilfs_write_inode_common(inode, raw_inode, 0); | |
688 | /* XXX: call with has_bmap = 0 is a workaround to avoid | |
689 | deadlock of bmap. This delays update of i_bmap to just | |
690 | before writing */ | |
e912a5b6 | 691 | nilfs_ifile_unmap_inode(ifile, ino, ibh); |
05fe58fd RK |
692 | } |
693 | ||
694 | #define NILFS_MAX_TRUNCATE_BLOCKS 16384 /* 64MB for 4KB block */ | |
695 | ||
696 | static void nilfs_truncate_bmap(struct nilfs_inode_info *ii, | |
697 | unsigned long from) | |
698 | { | |
3568a13f | 699 | __u64 b; |
05fe58fd RK |
700 | int ret; |
701 | ||
702 | if (!test_bit(NILFS_I_BMAP, &ii->i_state)) | |
703 | return; | |
e828949e | 704 | repeat: |
05fe58fd RK |
705 | ret = nilfs_bmap_last_key(ii->i_bmap, &b); |
706 | if (ret == -ENOENT) | |
707 | return; | |
708 | else if (ret < 0) | |
709 | goto failed; | |
710 | ||
711 | if (b < from) | |
712 | return; | |
713 | ||
3568a13f | 714 | b -= min_t(__u64, NILFS_MAX_TRUNCATE_BLOCKS, b - from); |
05fe58fd RK |
715 | ret = nilfs_bmap_truncate(ii->i_bmap, b); |
716 | nilfs_relax_pressure_in_lock(ii->vfs_inode.i_sb); | |
717 | if (!ret || (ret == -ENOMEM && | |
718 | nilfs_bmap_truncate(ii->i_bmap, b) == 0)) | |
719 | goto repeat; | |
720 | ||
e828949e RK |
721 | failed: |
722 | nilfs_warning(ii->vfs_inode.i_sb, __func__, | |
723 | "failed to truncate bmap (ino=%lu, err=%d)", | |
724 | ii->vfs_inode.i_ino, ret); | |
05fe58fd RK |
725 | } |
726 | ||
727 | void nilfs_truncate(struct inode *inode) | |
728 | { | |
729 | unsigned long blkoff; | |
730 | unsigned int blocksize; | |
731 | struct nilfs_transaction_info ti; | |
732 | struct super_block *sb = inode->i_sb; | |
733 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
05fe58fd RK |
734 | |
735 | if (!test_bit(NILFS_I_BMAP, &ii->i_state)) | |
736 | return; | |
737 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
738 | return; | |
739 | ||
740 | blocksize = sb->s_blocksize; | |
741 | blkoff = (inode->i_size + blocksize - 1) >> sb->s_blocksize_bits; | |
1f5abe7e | 742 | nilfs_transaction_begin(sb, &ti, 0); /* never fails */ |
05fe58fd RK |
743 | |
744 | block_truncate_page(inode->i_mapping, inode->i_size, nilfs_get_block); | |
745 | ||
746 | nilfs_truncate_bmap(ii, blkoff); | |
747 | ||
748 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
749 | if (IS_SYNC(inode)) | |
750 | nilfs_set_transaction_flag(NILFS_TI_SYNC); | |
751 | ||
abdb318b | 752 | nilfs_mark_inode_dirty(inode); |
bcbc8c64 | 753 | nilfs_set_file_dirty(inode, 0); |
47420c79 | 754 | nilfs_transaction_commit(sb); |
05fe58fd RK |
755 | /* May construct a logical segment and may fail in sync mode. |
756 | But truncate has no return value. */ | |
757 | } | |
758 | ||
6fd1e5c9 AV |
759 | static void nilfs_clear_inode(struct inode *inode) |
760 | { | |
761 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
518d1a6a | 762 | struct nilfs_mdt_info *mdi = NILFS_MDT(inode); |
6fd1e5c9 AV |
763 | |
764 | /* | |
765 | * Free resources allocated in nilfs_read_inode(), here. | |
766 | */ | |
767 | BUG_ON(!list_empty(&ii->i_dirty)); | |
768 | brelse(ii->i_bh); | |
769 | ii->i_bh = NULL; | |
770 | ||
518d1a6a RK |
771 | if (mdi && mdi->mi_palloc_cache) |
772 | nilfs_palloc_destroy_cache(inode); | |
773 | ||
6fd1e5c9 AV |
774 | if (test_bit(NILFS_I_BMAP, &ii->i_state)) |
775 | nilfs_bmap_clear(ii->i_bmap); | |
776 | ||
777 | nilfs_btnode_cache_clear(&ii->i_btnode_cache); | |
4d8d9293 RK |
778 | |
779 | if (ii->i_root && inode->i_ino == NILFS_ROOT_INO) | |
780 | nilfs_put_root(ii->i_root); | |
6fd1e5c9 AV |
781 | } |
782 | ||
783 | void nilfs_evict_inode(struct inode *inode) | |
05fe58fd RK |
784 | { |
785 | struct nilfs_transaction_info ti; | |
786 | struct super_block *sb = inode->i_sb; | |
787 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
25b18d39 | 788 | int ret; |
05fe58fd | 789 | |
4d8d9293 | 790 | if (inode->i_nlink || !ii->i_root || unlikely(is_bad_inode(inode))) { |
91b0abe3 | 791 | truncate_inode_pages_final(&inode->i_data); |
dbd5768f | 792 | clear_inode(inode); |
6fd1e5c9 | 793 | nilfs_clear_inode(inode); |
05fe58fd RK |
794 | return; |
795 | } | |
1f5abe7e RK |
796 | nilfs_transaction_begin(sb, &ti, 0); /* never fails */ |
797 | ||
91b0abe3 | 798 | truncate_inode_pages_final(&inode->i_data); |
05fe58fd | 799 | |
e912a5b6 | 800 | /* TODO: some of the following operations may fail. */ |
05fe58fd | 801 | nilfs_truncate_bmap(ii, 0); |
abdb318b | 802 | nilfs_mark_inode_dirty(inode); |
dbd5768f | 803 | clear_inode(inode); |
e912a5b6 | 804 | |
25b18d39 RK |
805 | ret = nilfs_ifile_delete_inode(ii->i_root->ifile, inode->i_ino); |
806 | if (!ret) | |
e5f7f848 | 807 | atomic64_dec(&ii->i_root->inodes_count); |
e912a5b6 | 808 | |
6fd1e5c9 | 809 | nilfs_clear_inode(inode); |
e912a5b6 | 810 | |
05fe58fd RK |
811 | if (IS_SYNC(inode)) |
812 | nilfs_set_transaction_flag(NILFS_TI_SYNC); | |
47420c79 | 813 | nilfs_transaction_commit(sb); |
05fe58fd RK |
814 | /* May construct a logical segment and may fail in sync mode. |
815 | But delete_inode has no return value. */ | |
816 | } | |
817 | ||
818 | int nilfs_setattr(struct dentry *dentry, struct iattr *iattr) | |
819 | { | |
820 | struct nilfs_transaction_info ti; | |
2b0143b5 | 821 | struct inode *inode = d_inode(dentry); |
05fe58fd | 822 | struct super_block *sb = inode->i_sb; |
47420c79 | 823 | int err; |
05fe58fd RK |
824 | |
825 | err = inode_change_ok(inode, iattr); | |
826 | if (err) | |
827 | return err; | |
828 | ||
829 | err = nilfs_transaction_begin(sb, &ti, 0); | |
830 | if (unlikely(err)) | |
831 | return err; | |
1025774c CH |
832 | |
833 | if ((iattr->ia_valid & ATTR_SIZE) && | |
834 | iattr->ia_size != i_size_read(inode)) { | |
562c72aa | 835 | inode_dio_wait(inode); |
2d1b399b MS |
836 | truncate_setsize(inode, iattr->ia_size); |
837 | nilfs_truncate(inode); | |
1025774c CH |
838 | } |
839 | ||
840 | setattr_copy(inode, iattr); | |
841 | mark_inode_dirty(inode); | |
842 | ||
843 | if (iattr->ia_valid & ATTR_MODE) { | |
05fe58fd | 844 | err = nilfs_acl_chmod(inode); |
1025774c CH |
845 | if (unlikely(err)) |
846 | goto out_err; | |
847 | } | |
848 | ||
849 | return nilfs_transaction_commit(sb); | |
47420c79 | 850 | |
1025774c CH |
851 | out_err: |
852 | nilfs_transaction_abort(sb); | |
47420c79 | 853 | return err; |
05fe58fd RK |
854 | } |
855 | ||
10556cb2 | 856 | int nilfs_permission(struct inode *inode, int mask) |
dc3d3b81 | 857 | { |
730e908f | 858 | struct nilfs_root *root = NILFS_I(inode)->i_root; |
dc3d3b81 RK |
859 | if ((mask & MAY_WRITE) && root && |
860 | root->cno != NILFS_CPTREE_CURRENT_CNO) | |
861 | return -EROFS; /* snapshot is not writable */ | |
862 | ||
2830ba7f | 863 | return generic_permission(inode, mask); |
dc3d3b81 RK |
864 | } |
865 | ||
bcbc8c64 | 866 | int nilfs_load_inode_block(struct inode *inode, struct buffer_head **pbh) |
05fe58fd | 867 | { |
e3154e97 | 868 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
05fe58fd RK |
869 | struct nilfs_inode_info *ii = NILFS_I(inode); |
870 | int err; | |
871 | ||
693dd321 | 872 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd | 873 | if (ii->i_bh == NULL) { |
693dd321 | 874 | spin_unlock(&nilfs->ns_inode_lock); |
e912a5b6 RK |
875 | err = nilfs_ifile_get_inode_block(ii->i_root->ifile, |
876 | inode->i_ino, pbh); | |
05fe58fd RK |
877 | if (unlikely(err)) |
878 | return err; | |
693dd321 | 879 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd RK |
880 | if (ii->i_bh == NULL) |
881 | ii->i_bh = *pbh; | |
882 | else { | |
883 | brelse(*pbh); | |
884 | *pbh = ii->i_bh; | |
885 | } | |
886 | } else | |
887 | *pbh = ii->i_bh; | |
888 | ||
889 | get_bh(*pbh); | |
693dd321 | 890 | spin_unlock(&nilfs->ns_inode_lock); |
05fe58fd RK |
891 | return 0; |
892 | } | |
893 | ||
894 | int nilfs_inode_dirty(struct inode *inode) | |
895 | { | |
896 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
e3154e97 | 897 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
05fe58fd RK |
898 | int ret = 0; |
899 | ||
900 | if (!list_empty(&ii->i_dirty)) { | |
693dd321 | 901 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd RK |
902 | ret = test_bit(NILFS_I_DIRTY, &ii->i_state) || |
903 | test_bit(NILFS_I_BUSY, &ii->i_state); | |
693dd321 | 904 | spin_unlock(&nilfs->ns_inode_lock); |
05fe58fd RK |
905 | } |
906 | return ret; | |
907 | } | |
908 | ||
bcbc8c64 | 909 | int nilfs_set_file_dirty(struct inode *inode, unsigned nr_dirty) |
05fe58fd RK |
910 | { |
911 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
e3154e97 | 912 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
05fe58fd | 913 | |
693dd321 | 914 | atomic_add(nr_dirty, &nilfs->ns_ndirtyblks); |
05fe58fd | 915 | |
458c5b08 | 916 | if (test_and_set_bit(NILFS_I_DIRTY, &ii->i_state)) |
05fe58fd RK |
917 | return 0; |
918 | ||
693dd321 | 919 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd RK |
920 | if (!test_bit(NILFS_I_QUEUED, &ii->i_state) && |
921 | !test_bit(NILFS_I_BUSY, &ii->i_state)) { | |
922 | /* Because this routine may race with nilfs_dispose_list(), | |
923 | we have to check NILFS_I_QUEUED here, too. */ | |
924 | if (list_empty(&ii->i_dirty) && igrab(inode) == NULL) { | |
925 | /* This will happen when somebody is freeing | |
926 | this inode. */ | |
693dd321 | 927 | nilfs_warning(inode->i_sb, __func__, |
05fe58fd RK |
928 | "cannot get inode (ino=%lu)\n", |
929 | inode->i_ino); | |
693dd321 | 930 | spin_unlock(&nilfs->ns_inode_lock); |
05fe58fd RK |
931 | return -EINVAL; /* NILFS_I_DIRTY may remain for |
932 | freeing inode */ | |
933 | } | |
eaae0f37 | 934 | list_move_tail(&ii->i_dirty, &nilfs->ns_dirty_files); |
05fe58fd RK |
935 | set_bit(NILFS_I_QUEUED, &ii->i_state); |
936 | } | |
693dd321 | 937 | spin_unlock(&nilfs->ns_inode_lock); |
05fe58fd RK |
938 | return 0; |
939 | } | |
940 | ||
b9f66140 | 941 | int __nilfs_mark_inode_dirty(struct inode *inode, int flags) |
05fe58fd | 942 | { |
05fe58fd RK |
943 | struct buffer_head *ibh; |
944 | int err; | |
945 | ||
bcbc8c64 | 946 | err = nilfs_load_inode_block(inode, &ibh); |
05fe58fd RK |
947 | if (unlikely(err)) { |
948 | nilfs_warning(inode->i_sb, __func__, | |
949 | "failed to reget inode block.\n"); | |
950 | return err; | |
951 | } | |
b9f66140 | 952 | nilfs_update_inode(inode, ibh, flags); |
5fc7b141 | 953 | mark_buffer_dirty(ibh); |
e912a5b6 | 954 | nilfs_mdt_mark_dirty(NILFS_I(inode)->i_root->ifile); |
05fe58fd RK |
955 | brelse(ibh); |
956 | return 0; | |
957 | } | |
958 | ||
959 | /** | |
960 | * nilfs_dirty_inode - reflect changes on given inode to an inode block. | |
961 | * @inode: inode of the file to be registered. | |
962 | * | |
963 | * nilfs_dirty_inode() loads a inode block containing the specified | |
964 | * @inode and copies data from a nilfs_inode to a corresponding inode | |
965 | * entry in the inode block. This operation is excluded from the segment | |
966 | * construction. This function can be called both as a single operation | |
967 | * and as a part of indivisible file operations. | |
968 | */ | |
aa385729 | 969 | void nilfs_dirty_inode(struct inode *inode, int flags) |
05fe58fd RK |
970 | { |
971 | struct nilfs_transaction_info ti; | |
7d6cd92f | 972 | struct nilfs_mdt_info *mdi = NILFS_MDT(inode); |
05fe58fd RK |
973 | |
974 | if (is_bad_inode(inode)) { | |
975 | nilfs_warning(inode->i_sb, __func__, | |
976 | "tried to mark bad_inode dirty. ignored.\n"); | |
977 | dump_stack(); | |
978 | return; | |
979 | } | |
7d6cd92f RK |
980 | if (mdi) { |
981 | nilfs_mdt_mark_dirty(inode); | |
982 | return; | |
983 | } | |
05fe58fd | 984 | nilfs_transaction_begin(inode->i_sb, &ti, 0); |
b9f66140 | 985 | __nilfs_mark_inode_dirty(inode, flags); |
47420c79 | 986 | nilfs_transaction_commit(inode->i_sb); /* never fails */ |
05fe58fd | 987 | } |
622daaff RK |
988 | |
989 | int nilfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, | |
990 | __u64 start, __u64 len) | |
991 | { | |
0ef28f9a | 992 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
622daaff RK |
993 | __u64 logical = 0, phys = 0, size = 0; |
994 | __u32 flags = 0; | |
995 | loff_t isize; | |
996 | sector_t blkoff, end_blkoff; | |
997 | sector_t delalloc_blkoff; | |
998 | unsigned long delalloc_blklen; | |
999 | unsigned int blkbits = inode->i_blkbits; | |
1000 | int ret, n; | |
1001 | ||
1002 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
1003 | if (ret) | |
1004 | return ret; | |
1005 | ||
5955102c | 1006 | inode_lock(inode); |
622daaff RK |
1007 | |
1008 | isize = i_size_read(inode); | |
1009 | ||
1010 | blkoff = start >> blkbits; | |
1011 | end_blkoff = (start + len - 1) >> blkbits; | |
1012 | ||
1013 | delalloc_blklen = nilfs_find_uncommitted_extent(inode, blkoff, | |
1014 | &delalloc_blkoff); | |
1015 | ||
1016 | do { | |
1017 | __u64 blkphy; | |
1018 | unsigned int maxblocks; | |
1019 | ||
1020 | if (delalloc_blklen && blkoff == delalloc_blkoff) { | |
1021 | if (size) { | |
1022 | /* End of the current extent */ | |
1023 | ret = fiemap_fill_next_extent( | |
1024 | fieinfo, logical, phys, size, flags); | |
1025 | if (ret) | |
1026 | break; | |
1027 | } | |
1028 | if (blkoff > end_blkoff) | |
1029 | break; | |
1030 | ||
1031 | flags = FIEMAP_EXTENT_MERGED | FIEMAP_EXTENT_DELALLOC; | |
1032 | logical = blkoff << blkbits; | |
1033 | phys = 0; | |
1034 | size = delalloc_blklen << blkbits; | |
1035 | ||
1036 | blkoff = delalloc_blkoff + delalloc_blklen; | |
1037 | delalloc_blklen = nilfs_find_uncommitted_extent( | |
1038 | inode, blkoff, &delalloc_blkoff); | |
1039 | continue; | |
1040 | } | |
1041 | ||
1042 | /* | |
1043 | * Limit the number of blocks that we look up so as | |
1044 | * not to get into the next delayed allocation extent. | |
1045 | */ | |
1046 | maxblocks = INT_MAX; | |
1047 | if (delalloc_blklen) | |
1048 | maxblocks = min_t(sector_t, delalloc_blkoff - blkoff, | |
1049 | maxblocks); | |
1050 | blkphy = 0; | |
1051 | ||
1052 | down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); | |
1053 | n = nilfs_bmap_lookup_contig( | |
1054 | NILFS_I(inode)->i_bmap, blkoff, &blkphy, maxblocks); | |
1055 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); | |
1056 | ||
1057 | if (n < 0) { | |
1058 | int past_eof; | |
1059 | ||
1060 | if (unlikely(n != -ENOENT)) | |
1061 | break; /* error */ | |
1062 | ||
1063 | /* HOLE */ | |
1064 | blkoff++; | |
1065 | past_eof = ((blkoff << blkbits) >= isize); | |
1066 | ||
1067 | if (size) { | |
1068 | /* End of the current extent */ | |
1069 | ||
1070 | if (past_eof) | |
1071 | flags |= FIEMAP_EXTENT_LAST; | |
1072 | ||
1073 | ret = fiemap_fill_next_extent( | |
1074 | fieinfo, logical, phys, size, flags); | |
1075 | if (ret) | |
1076 | break; | |
1077 | size = 0; | |
1078 | } | |
1079 | if (blkoff > end_blkoff || past_eof) | |
1080 | break; | |
1081 | } else { | |
1082 | if (size) { | |
1083 | if (phys && blkphy << blkbits == phys + size) { | |
1084 | /* The current extent goes on */ | |
1085 | size += n << blkbits; | |
1086 | } else { | |
1087 | /* Terminate the current extent */ | |
1088 | ret = fiemap_fill_next_extent( | |
1089 | fieinfo, logical, phys, size, | |
1090 | flags); | |
1091 | if (ret || blkoff > end_blkoff) | |
1092 | break; | |
1093 | ||
1094 | /* Start another extent */ | |
1095 | flags = FIEMAP_EXTENT_MERGED; | |
1096 | logical = blkoff << blkbits; | |
1097 | phys = blkphy << blkbits; | |
1098 | size = n << blkbits; | |
1099 | } | |
1100 | } else { | |
1101 | /* Start a new extent */ | |
1102 | flags = FIEMAP_EXTENT_MERGED; | |
1103 | logical = blkoff << blkbits; | |
1104 | phys = blkphy << blkbits; | |
1105 | size = n << blkbits; | |
1106 | } | |
1107 | blkoff += n; | |
1108 | } | |
1109 | cond_resched(); | |
1110 | } while (true); | |
1111 | ||
1112 | /* If ret is 1 then we just hit the end of the extent array */ | |
1113 | if (ret == 1) | |
1114 | ret = 0; | |
1115 | ||
5955102c | 1116 | inode_unlock(inode); |
622daaff RK |
1117 | return ret; |
1118 | } |