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Commit | Line | Data |
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ae98043f | 1 | // SPDX-License-Identifier: GPL-2.0+ |
05fe58fd RK |
2 | /* |
3 | * inode.c - NILFS inode operations. | |
4 | * | |
5 | * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation. | |
6 | * | |
4b420ab4 | 7 | * Written by Ryusuke Konishi. |
05fe58fd RK |
8 | * |
9 | */ | |
10 | ||
11 | #include <linux/buffer_head.h> | |
5a0e3ad6 | 12 | #include <linux/gfp.h> |
05fe58fd | 13 | #include <linux/mpage.h> |
56d7acc7 | 14 | #include <linux/pagemap.h> |
05fe58fd | 15 | #include <linux/writeback.h> |
e2e40f2c | 16 | #include <linux/uio.h> |
10c5db28 | 17 | #include <linux/fiemap.h> |
05fe58fd | 18 | #include "nilfs.h" |
6fd1e5c9 | 19 | #include "btnode.h" |
05fe58fd RK |
20 | #include "segment.h" |
21 | #include "page.h" | |
22 | #include "mdt.h" | |
23 | #include "cpfile.h" | |
24 | #include "ifile.h" | |
25 | ||
f5974c8f VD |
26 | /** |
27 | * struct nilfs_iget_args - arguments used during comparison between inodes | |
28 | * @ino: inode number | |
29 | * @cno: checkpoint number | |
30 | * @root: pointer on NILFS root object (mounted checkpoint) | |
31 | * @for_gc: inode for GC flag | |
32 | */ | |
0e14a359 RK |
33 | struct nilfs_iget_args { |
34 | u64 ino; | |
35 | __u64 cno; | |
4d8d9293 | 36 | struct nilfs_root *root; |
0e14a359 RK |
37 | int for_gc; |
38 | }; | |
05fe58fd | 39 | |
705304a8 RK |
40 | static int nilfs_iget_test(struct inode *inode, void *opaque); |
41 | ||
be667377 RK |
42 | void nilfs_inode_add_blocks(struct inode *inode, int n) |
43 | { | |
44 | struct nilfs_root *root = NILFS_I(inode)->i_root; | |
45 | ||
93407472 | 46 | inode_add_bytes(inode, i_blocksize(inode) * n); |
be667377 | 47 | if (root) |
e5f7f848 | 48 | atomic64_add(n, &root->blocks_count); |
be667377 RK |
49 | } |
50 | ||
51 | void nilfs_inode_sub_blocks(struct inode *inode, int n) | |
52 | { | |
53 | struct nilfs_root *root = NILFS_I(inode)->i_root; | |
54 | ||
93407472 | 55 | inode_sub_bytes(inode, i_blocksize(inode) * n); |
be667377 | 56 | if (root) |
e5f7f848 | 57 | atomic64_sub(n, &root->blocks_count); |
be667377 RK |
58 | } |
59 | ||
05fe58fd RK |
60 | /** |
61 | * nilfs_get_block() - get a file block on the filesystem (callback function) | |
62 | * @inode - inode struct of the target file | |
63 | * @blkoff - file block number | |
64 | * @bh_result - buffer head to be mapped on | |
65 | * @create - indicate whether allocating the block or not when it has not | |
66 | * been allocated yet. | |
67 | * | |
68 | * This function does not issue actual read request of the specified data | |
69 | * block. It is done by VFS. | |
05fe58fd RK |
70 | */ |
71 | int nilfs_get_block(struct inode *inode, sector_t blkoff, | |
72 | struct buffer_head *bh_result, int create) | |
73 | { | |
74 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
0ef28f9a | 75 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
c3a7abf0 | 76 | __u64 blknum = 0; |
05fe58fd | 77 | int err = 0, ret; |
0c6c44cb | 78 | unsigned int maxblocks = bh_result->b_size >> inode->i_blkbits; |
05fe58fd | 79 | |
0ef28f9a | 80 | down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
c3a7abf0 | 81 | ret = nilfs_bmap_lookup_contig(ii->i_bmap, blkoff, &blknum, maxblocks); |
0ef28f9a | 82 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
c3a7abf0 | 83 | if (ret >= 0) { /* found */ |
05fe58fd | 84 | map_bh(bh_result, inode->i_sb, blknum); |
c3a7abf0 RK |
85 | if (ret > 0) |
86 | bh_result->b_size = (ret << inode->i_blkbits); | |
05fe58fd RK |
87 | goto out; |
88 | } | |
05fe58fd RK |
89 | /* data block was not found */ |
90 | if (ret == -ENOENT && create) { | |
91 | struct nilfs_transaction_info ti; | |
92 | ||
93 | bh_result->b_blocknr = 0; | |
94 | err = nilfs_transaction_begin(inode->i_sb, &ti, 1); | |
95 | if (unlikely(err)) | |
96 | goto out; | |
3568a13f | 97 | err = nilfs_bmap_insert(ii->i_bmap, blkoff, |
05fe58fd | 98 | (unsigned long)bh_result); |
05fe58fd RK |
99 | if (unlikely(err != 0)) { |
100 | if (err == -EEXIST) { | |
101 | /* | |
102 | * The get_block() function could be called | |
103 | * from multiple callers for an inode. | |
104 | * However, the page having this block must | |
105 | * be locked in this case. | |
106 | */ | |
a1d0747a JP |
107 | nilfs_warn(inode->i_sb, |
108 | "%s (ino=%lu): a race condition while inserting a data block at offset=%llu", | |
109 | __func__, inode->i_ino, | |
110 | (unsigned long long)blkoff); | |
1f5abe7e | 111 | err = 0; |
05fe58fd | 112 | } |
47420c79 | 113 | nilfs_transaction_abort(inode->i_sb); |
05fe58fd RK |
114 | goto out; |
115 | } | |
b9f66140 | 116 | nilfs_mark_inode_dirty_sync(inode); |
47420c79 | 117 | nilfs_transaction_commit(inode->i_sb); /* never fails */ |
05fe58fd RK |
118 | /* Error handling should be detailed */ |
119 | set_buffer_new(bh_result); | |
27e6c7a3 | 120 | set_buffer_delay(bh_result); |
076a378b RK |
121 | map_bh(bh_result, inode->i_sb, 0); |
122 | /* Disk block number must be changed to proper value */ | |
123 | ||
05fe58fd | 124 | } else if (ret == -ENOENT) { |
076a378b RK |
125 | /* |
126 | * not found is not error (e.g. hole); must return without | |
127 | * the mapped state flag. | |
128 | */ | |
05fe58fd RK |
129 | ; |
130 | } else { | |
131 | err = ret; | |
132 | } | |
133 | ||
134 | out: | |
135 | return err; | |
136 | } | |
137 | ||
138 | /** | |
139 | * nilfs_readpage() - implement readpage() method of nilfs_aops {} | |
140 | * address_space_operations. | |
141 | * @file - file struct of the file to be read | |
142 | * @page - the page to be read | |
143 | */ | |
144 | static int nilfs_readpage(struct file *file, struct page *page) | |
145 | { | |
146 | return mpage_readpage(page, nilfs_get_block); | |
147 | } | |
148 | ||
d4388340 | 149 | static void nilfs_readahead(struct readahead_control *rac) |
05fe58fd | 150 | { |
d4388340 | 151 | mpage_readahead(rac, nilfs_get_block); |
05fe58fd RK |
152 | } |
153 | ||
154 | static int nilfs_writepages(struct address_space *mapping, | |
155 | struct writeback_control *wbc) | |
156 | { | |
f30bf3e4 RK |
157 | struct inode *inode = mapping->host; |
158 | int err = 0; | |
159 | ||
bc98a42c | 160 | if (sb_rdonly(inode->i_sb)) { |
8c26c4e2 VD |
161 | nilfs_clear_dirty_pages(mapping, false); |
162 | return -EROFS; | |
163 | } | |
164 | ||
f30bf3e4 RK |
165 | if (wbc->sync_mode == WB_SYNC_ALL) |
166 | err = nilfs_construct_dsync_segment(inode->i_sb, inode, | |
167 | wbc->range_start, | |
168 | wbc->range_end); | |
169 | return err; | |
05fe58fd RK |
170 | } |
171 | ||
172 | static int nilfs_writepage(struct page *page, struct writeback_control *wbc) | |
173 | { | |
174 | struct inode *inode = page->mapping->host; | |
175 | int err; | |
176 | ||
bc98a42c | 177 | if (sb_rdonly(inode->i_sb)) { |
8c26c4e2 VD |
178 | /* |
179 | * It means that filesystem was remounted in read-only | |
180 | * mode because of error or metadata corruption. But we | |
181 | * have dirty pages that try to be flushed in background. | |
182 | * So, here we simply discard this dirty page. | |
183 | */ | |
184 | nilfs_clear_dirty_page(page, false); | |
185 | unlock_page(page); | |
186 | return -EROFS; | |
187 | } | |
188 | ||
05fe58fd RK |
189 | redirty_page_for_writepage(wbc, page); |
190 | unlock_page(page); | |
191 | ||
192 | if (wbc->sync_mode == WB_SYNC_ALL) { | |
193 | err = nilfs_construct_segment(inode->i_sb); | |
194 | if (unlikely(err)) | |
195 | return err; | |
196 | } else if (wbc->for_reclaim) | |
197 | nilfs_flush_segment(inode->i_sb, inode->i_ino); | |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
202 | static int nilfs_set_page_dirty(struct page *page) | |
203 | { | |
56d7acc7 | 204 | struct inode *inode = page->mapping->host; |
136e8770 | 205 | int ret = __set_page_dirty_nobuffers(page); |
05fe58fd | 206 | |
136e8770 | 207 | if (page_has_buffers(page)) { |
0c6c44cb | 208 | unsigned int nr_dirty = 0; |
136e8770 | 209 | struct buffer_head *bh, *head; |
05fe58fd | 210 | |
136e8770 RK |
211 | /* |
212 | * This page is locked by callers, and no other thread | |
213 | * concurrently marks its buffers dirty since they are | |
214 | * only dirtied through routines in fs/buffer.c in | |
215 | * which call sites of mark_buffer_dirty are protected | |
216 | * by page lock. | |
217 | */ | |
218 | bh = head = page_buffers(page); | |
219 | do { | |
220 | /* Do not mark hole blocks dirty */ | |
221 | if (buffer_dirty(bh) || !buffer_mapped(bh)) | |
222 | continue; | |
223 | ||
224 | set_buffer_dirty(bh); | |
225 | nr_dirty++; | |
226 | } while (bh = bh->b_this_page, bh != head); | |
227 | ||
228 | if (nr_dirty) | |
229 | nilfs_set_file_dirty(inode, nr_dirty); | |
56d7acc7 | 230 | } else if (ret) { |
0c6c44cb | 231 | unsigned int nr_dirty = 1 << (PAGE_SHIFT - inode->i_blkbits); |
56d7acc7 AR |
232 | |
233 | nilfs_set_file_dirty(inode, nr_dirty); | |
05fe58fd RK |
234 | } |
235 | return ret; | |
236 | } | |
237 | ||
2d1b399b MS |
238 | void nilfs_write_failed(struct address_space *mapping, loff_t to) |
239 | { | |
240 | struct inode *inode = mapping->host; | |
241 | ||
242 | if (to > inode->i_size) { | |
7caef267 | 243 | truncate_pagecache(inode, inode->i_size); |
2d1b399b MS |
244 | nilfs_truncate(inode); |
245 | } | |
246 | } | |
247 | ||
05fe58fd RK |
248 | static int nilfs_write_begin(struct file *file, struct address_space *mapping, |
249 | loff_t pos, unsigned len, unsigned flags, | |
250 | struct page **pagep, void **fsdata) | |
251 | ||
252 | { | |
253 | struct inode *inode = mapping->host; | |
254 | int err = nilfs_transaction_begin(inode->i_sb, NULL, 1); | |
255 | ||
256 | if (unlikely(err)) | |
257 | return err; | |
258 | ||
155130a4 CH |
259 | err = block_write_begin(mapping, pos, len, flags, pagep, |
260 | nilfs_get_block); | |
261 | if (unlikely(err)) { | |
2d1b399b | 262 | nilfs_write_failed(mapping, pos + len); |
47420c79 | 263 | nilfs_transaction_abort(inode->i_sb); |
155130a4 | 264 | } |
05fe58fd RK |
265 | return err; |
266 | } | |
267 | ||
268 | static int nilfs_write_end(struct file *file, struct address_space *mapping, | |
269 | loff_t pos, unsigned len, unsigned copied, | |
270 | struct page *page, void *fsdata) | |
271 | { | |
272 | struct inode *inode = mapping->host; | |
0c6c44cb RK |
273 | unsigned int start = pos & (PAGE_SIZE - 1); |
274 | unsigned int nr_dirty; | |
05fe58fd RK |
275 | int err; |
276 | ||
277 | nr_dirty = nilfs_page_count_clean_buffers(page, start, | |
278 | start + copied); | |
279 | copied = generic_write_end(file, mapping, pos, len, copied, page, | |
280 | fsdata); | |
bcbc8c64 | 281 | nilfs_set_file_dirty(inode, nr_dirty); |
47420c79 | 282 | err = nilfs_transaction_commit(inode->i_sb); |
05fe58fd RK |
283 | return err ? : copied; |
284 | } | |
285 | ||
286 | static ssize_t | |
c8b8e32d | 287 | nilfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
05fe58fd | 288 | { |
6b6dabc8 | 289 | struct inode *inode = file_inode(iocb->ki_filp); |
05fe58fd | 290 | |
6f673763 | 291 | if (iov_iter_rw(iter) == WRITE) |
05fe58fd RK |
292 | return 0; |
293 | ||
294 | /* Needs synchronization with the cleaner */ | |
c8b8e32d | 295 | return blockdev_direct_IO(iocb, inode, iter, nilfs_get_block); |
05fe58fd RK |
296 | } |
297 | ||
7f09410b | 298 | const struct address_space_operations nilfs_aops = { |
05fe58fd RK |
299 | .writepage = nilfs_writepage, |
300 | .readpage = nilfs_readpage, | |
05fe58fd RK |
301 | .writepages = nilfs_writepages, |
302 | .set_page_dirty = nilfs_set_page_dirty, | |
d4388340 | 303 | .readahead = nilfs_readahead, |
05fe58fd RK |
304 | .write_begin = nilfs_write_begin, |
305 | .write_end = nilfs_write_end, | |
306 | /* .releasepage = nilfs_releasepage, */ | |
307 | .invalidatepage = block_invalidatepage, | |
308 | .direct_IO = nilfs_direct_IO, | |
258ef67e | 309 | .is_partially_uptodate = block_is_partially_uptodate, |
05fe58fd RK |
310 | }; |
311 | ||
705304a8 RK |
312 | static int nilfs_insert_inode_locked(struct inode *inode, |
313 | struct nilfs_root *root, | |
314 | unsigned long ino) | |
315 | { | |
316 | struct nilfs_iget_args args = { | |
317 | .ino = ino, .root = root, .cno = 0, .for_gc = 0 | |
318 | }; | |
319 | ||
320 | return insert_inode_locked4(inode, ino, nilfs_iget_test, &args); | |
321 | } | |
322 | ||
c6e49e3f | 323 | struct inode *nilfs_new_inode(struct inode *dir, umode_t mode) |
05fe58fd RK |
324 | { |
325 | struct super_block *sb = dir->i_sb; | |
e3154e97 | 326 | struct the_nilfs *nilfs = sb->s_fs_info; |
05fe58fd RK |
327 | struct inode *inode; |
328 | struct nilfs_inode_info *ii; | |
4d8d9293 | 329 | struct nilfs_root *root; |
05fe58fd RK |
330 | int err = -ENOMEM; |
331 | ino_t ino; | |
332 | ||
333 | inode = new_inode(sb); | |
334 | if (unlikely(!inode)) | |
335 | goto failed; | |
336 | ||
337 | mapping_set_gfp_mask(inode->i_mapping, | |
c62d2555 | 338 | mapping_gfp_constraint(inode->i_mapping, ~__GFP_FS)); |
05fe58fd | 339 | |
4d8d9293 | 340 | root = NILFS_I(dir)->i_root; |
05fe58fd | 341 | ii = NILFS_I(inode); |
4ce5c342 | 342 | ii->i_state = BIT(NILFS_I_NEW); |
4d8d9293 | 343 | ii->i_root = root; |
05fe58fd | 344 | |
e912a5b6 | 345 | err = nilfs_ifile_create_inode(root->ifile, &ino, &ii->i_bh); |
05fe58fd RK |
346 | if (unlikely(err)) |
347 | goto failed_ifile_create_inode; | |
348 | /* reference count of i_bh inherits from nilfs_mdt_read_block() */ | |
349 | ||
e5f7f848 | 350 | atomic64_inc(&root->inodes_count); |
73459dcc | 351 | inode_init_owner(inode, dir, mode); |
05fe58fd | 352 | inode->i_ino = ino; |
078cd827 | 353 | inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); |
05fe58fd RK |
354 | |
355 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) { | |
356 | err = nilfs_bmap_read(ii->i_bmap, NULL); | |
357 | if (err < 0) | |
705304a8 | 358 | goto failed_after_creation; |
05fe58fd RK |
359 | |
360 | set_bit(NILFS_I_BMAP, &ii->i_state); | |
361 | /* No lock is needed; iget() ensures it. */ | |
362 | } | |
363 | ||
b253a3e4 RK |
364 | ii->i_flags = nilfs_mask_flags( |
365 | mode, NILFS_I(dir)->i_flags & NILFS_FL_INHERITED); | |
05fe58fd RK |
366 | |
367 | /* ii->i_file_acl = 0; */ | |
368 | /* ii->i_dir_acl = 0; */ | |
05fe58fd | 369 | ii->i_dir_start_lookup = 0; |
05fe58fd | 370 | nilfs_set_inode_flags(inode); |
9b1fc4e4 RK |
371 | spin_lock(&nilfs->ns_next_gen_lock); |
372 | inode->i_generation = nilfs->ns_next_generation++; | |
373 | spin_unlock(&nilfs->ns_next_gen_lock); | |
705304a8 RK |
374 | if (nilfs_insert_inode_locked(inode, root, ino) < 0) { |
375 | err = -EIO; | |
376 | goto failed_after_creation; | |
377 | } | |
05fe58fd RK |
378 | |
379 | err = nilfs_init_acl(inode, dir); | |
380 | if (unlikely(err)) | |
076a378b RK |
381 | /* |
382 | * Never occur. When supporting nilfs_init_acl(), | |
383 | * proper cancellation of above jobs should be considered. | |
384 | */ | |
385 | goto failed_after_creation; | |
05fe58fd | 386 | |
05fe58fd RK |
387 | return inode; |
388 | ||
705304a8 | 389 | failed_after_creation: |
6d6b77f1 | 390 | clear_nlink(inode); |
1b0e3186 EB |
391 | if (inode->i_state & I_NEW) |
392 | unlock_new_inode(inode); | |
076a378b RK |
393 | iput(inode); /* |
394 | * raw_inode will be deleted through | |
395 | * nilfs_evict_inode(). | |
396 | */ | |
05fe58fd RK |
397 | goto failed; |
398 | ||
399 | failed_ifile_create_inode: | |
400 | make_bad_inode(inode); | |
076a378b | 401 | iput(inode); |
05fe58fd RK |
402 | failed: |
403 | return ERR_PTR(err); | |
404 | } | |
405 | ||
05fe58fd RK |
406 | void nilfs_set_inode_flags(struct inode *inode) |
407 | { | |
408 | unsigned int flags = NILFS_I(inode)->i_flags; | |
faea2c53 | 409 | unsigned int new_fl = 0; |
05fe58fd | 410 | |
f0c9f242 | 411 | if (flags & FS_SYNC_FL) |
faea2c53 | 412 | new_fl |= S_SYNC; |
f0c9f242 | 413 | if (flags & FS_APPEND_FL) |
faea2c53 | 414 | new_fl |= S_APPEND; |
f0c9f242 | 415 | if (flags & FS_IMMUTABLE_FL) |
faea2c53 | 416 | new_fl |= S_IMMUTABLE; |
f0c9f242 | 417 | if (flags & FS_NOATIME_FL) |
faea2c53 | 418 | new_fl |= S_NOATIME; |
f0c9f242 | 419 | if (flags & FS_DIRSYNC_FL) |
faea2c53 RK |
420 | new_fl |= S_DIRSYNC; |
421 | inode_set_flags(inode, new_fl, S_SYNC | S_APPEND | S_IMMUTABLE | | |
422 | S_NOATIME | S_DIRSYNC); | |
05fe58fd RK |
423 | } |
424 | ||
425 | int nilfs_read_inode_common(struct inode *inode, | |
426 | struct nilfs_inode *raw_inode) | |
427 | { | |
428 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
429 | int err; | |
430 | ||
431 | inode->i_mode = le16_to_cpu(raw_inode->i_mode); | |
305d3d0d EB |
432 | i_uid_write(inode, le32_to_cpu(raw_inode->i_uid)); |
433 | i_gid_write(inode, le32_to_cpu(raw_inode->i_gid)); | |
bfe86848 | 434 | set_nlink(inode, le16_to_cpu(raw_inode->i_links_count)); |
05fe58fd RK |
435 | inode->i_size = le64_to_cpu(raw_inode->i_size); |
436 | inode->i_atime.tv_sec = le64_to_cpu(raw_inode->i_mtime); | |
437 | inode->i_ctime.tv_sec = le64_to_cpu(raw_inode->i_ctime); | |
438 | inode->i_mtime.tv_sec = le64_to_cpu(raw_inode->i_mtime); | |
61239230 RK |
439 | inode->i_atime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec); |
440 | inode->i_ctime.tv_nsec = le32_to_cpu(raw_inode->i_ctime_nsec); | |
441 | inode->i_mtime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec); | |
705304a8 RK |
442 | if (inode->i_nlink == 0) |
443 | return -ESTALE; /* this inode is deleted */ | |
05fe58fd RK |
444 | |
445 | inode->i_blocks = le64_to_cpu(raw_inode->i_blocks); | |
446 | ii->i_flags = le32_to_cpu(raw_inode->i_flags); | |
447 | #if 0 | |
448 | ii->i_file_acl = le32_to_cpu(raw_inode->i_file_acl); | |
449 | ii->i_dir_acl = S_ISREG(inode->i_mode) ? | |
450 | 0 : le32_to_cpu(raw_inode->i_dir_acl); | |
451 | #endif | |
3cc811bf | 452 | ii->i_dir_start_lookup = 0; |
05fe58fd RK |
453 | inode->i_generation = le32_to_cpu(raw_inode->i_generation); |
454 | ||
455 | if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
456 | S_ISLNK(inode->i_mode)) { | |
457 | err = nilfs_bmap_read(ii->i_bmap, raw_inode); | |
458 | if (err < 0) | |
459 | return err; | |
460 | set_bit(NILFS_I_BMAP, &ii->i_state); | |
461 | /* No lock is needed; iget() ensures it. */ | |
462 | } | |
463 | return 0; | |
464 | } | |
465 | ||
e912a5b6 RK |
466 | static int __nilfs_read_inode(struct super_block *sb, |
467 | struct nilfs_root *root, unsigned long ino, | |
05fe58fd RK |
468 | struct inode *inode) |
469 | { | |
e3154e97 | 470 | struct the_nilfs *nilfs = sb->s_fs_info; |
05fe58fd RK |
471 | struct buffer_head *bh; |
472 | struct nilfs_inode *raw_inode; | |
473 | int err; | |
474 | ||
365e215c | 475 | down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
e912a5b6 | 476 | err = nilfs_ifile_get_inode_block(root->ifile, ino, &bh); |
05fe58fd RK |
477 | if (unlikely(err)) |
478 | goto bad_inode; | |
479 | ||
e912a5b6 | 480 | raw_inode = nilfs_ifile_map_inode(root->ifile, ino, bh); |
05fe58fd | 481 | |
1b2f5a64 RK |
482 | err = nilfs_read_inode_common(inode, raw_inode); |
483 | if (err) | |
05fe58fd RK |
484 | goto failed_unmap; |
485 | ||
486 | if (S_ISREG(inode->i_mode)) { | |
487 | inode->i_op = &nilfs_file_inode_operations; | |
488 | inode->i_fop = &nilfs_file_operations; | |
489 | inode->i_mapping->a_ops = &nilfs_aops; | |
05fe58fd RK |
490 | } else if (S_ISDIR(inode->i_mode)) { |
491 | inode->i_op = &nilfs_dir_inode_operations; | |
492 | inode->i_fop = &nilfs_dir_operations; | |
493 | inode->i_mapping->a_ops = &nilfs_aops; | |
494 | } else if (S_ISLNK(inode->i_mode)) { | |
495 | inode->i_op = &nilfs_symlink_inode_operations; | |
21fc61c7 | 496 | inode_nohighmem(inode); |
05fe58fd RK |
497 | inode->i_mapping->a_ops = &nilfs_aops; |
498 | } else { | |
499 | inode->i_op = &nilfs_special_inode_operations; | |
500 | init_special_inode( | |
501 | inode, inode->i_mode, | |
cdce214e | 502 | huge_decode_dev(le64_to_cpu(raw_inode->i_device_code))); |
05fe58fd | 503 | } |
e912a5b6 | 504 | nilfs_ifile_unmap_inode(root->ifile, ino, bh); |
05fe58fd | 505 | brelse(bh); |
365e215c | 506 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
05fe58fd | 507 | nilfs_set_inode_flags(inode); |
0ce187c4 | 508 | mapping_set_gfp_mask(inode->i_mapping, |
c62d2555 | 509 | mapping_gfp_constraint(inode->i_mapping, ~__GFP_FS)); |
05fe58fd RK |
510 | return 0; |
511 | ||
512 | failed_unmap: | |
e912a5b6 | 513 | nilfs_ifile_unmap_inode(root->ifile, ino, bh); |
05fe58fd RK |
514 | brelse(bh); |
515 | ||
516 | bad_inode: | |
365e215c | 517 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
05fe58fd RK |
518 | return err; |
519 | } | |
520 | ||
0e14a359 RK |
521 | static int nilfs_iget_test(struct inode *inode, void *opaque) |
522 | { | |
523 | struct nilfs_iget_args *args = opaque; | |
524 | struct nilfs_inode_info *ii; | |
525 | ||
4d8d9293 | 526 | if (args->ino != inode->i_ino || args->root != NILFS_I(inode)->i_root) |
0e14a359 RK |
527 | return 0; |
528 | ||
529 | ii = NILFS_I(inode); | |
530 | if (!test_bit(NILFS_I_GCINODE, &ii->i_state)) | |
531 | return !args->for_gc; | |
532 | ||
533 | return args->for_gc && args->cno == ii->i_cno; | |
534 | } | |
535 | ||
536 | static int nilfs_iget_set(struct inode *inode, void *opaque) | |
537 | { | |
538 | struct nilfs_iget_args *args = opaque; | |
539 | ||
540 | inode->i_ino = args->ino; | |
541 | if (args->for_gc) { | |
4ce5c342 | 542 | NILFS_I(inode)->i_state = BIT(NILFS_I_GCINODE); |
0e14a359 | 543 | NILFS_I(inode)->i_cno = args->cno; |
4d8d9293 RK |
544 | NILFS_I(inode)->i_root = NULL; |
545 | } else { | |
546 | if (args->root && args->ino == NILFS_ROOT_INO) | |
547 | nilfs_get_root(args->root); | |
548 | NILFS_I(inode)->i_root = args->root; | |
0e14a359 RK |
549 | } |
550 | return 0; | |
551 | } | |
552 | ||
032dbb3b RK |
553 | struct inode *nilfs_ilookup(struct super_block *sb, struct nilfs_root *root, |
554 | unsigned long ino) | |
555 | { | |
556 | struct nilfs_iget_args args = { | |
557 | .ino = ino, .root = root, .cno = 0, .for_gc = 0 | |
558 | }; | |
559 | ||
560 | return ilookup5(sb, ino, nilfs_iget_test, &args); | |
561 | } | |
562 | ||
f1e89c86 RK |
563 | struct inode *nilfs_iget_locked(struct super_block *sb, struct nilfs_root *root, |
564 | unsigned long ino) | |
05fe58fd | 565 | { |
4d8d9293 RK |
566 | struct nilfs_iget_args args = { |
567 | .ino = ino, .root = root, .cno = 0, .for_gc = 0 | |
568 | }; | |
f1e89c86 RK |
569 | |
570 | return iget5_locked(sb, ino, nilfs_iget_test, nilfs_iget_set, &args); | |
571 | } | |
572 | ||
573 | struct inode *nilfs_iget(struct super_block *sb, struct nilfs_root *root, | |
574 | unsigned long ino) | |
575 | { | |
05fe58fd RK |
576 | struct inode *inode; |
577 | int err; | |
578 | ||
f1e89c86 | 579 | inode = nilfs_iget_locked(sb, root, ino); |
05fe58fd RK |
580 | if (unlikely(!inode)) |
581 | return ERR_PTR(-ENOMEM); | |
582 | if (!(inode->i_state & I_NEW)) | |
583 | return inode; | |
584 | ||
e912a5b6 | 585 | err = __nilfs_read_inode(sb, root, ino, inode); |
05fe58fd RK |
586 | if (unlikely(err)) { |
587 | iget_failed(inode); | |
588 | return ERR_PTR(err); | |
589 | } | |
590 | unlock_new_inode(inode); | |
591 | return inode; | |
592 | } | |
593 | ||
263d90ce RK |
594 | struct inode *nilfs_iget_for_gc(struct super_block *sb, unsigned long ino, |
595 | __u64 cno) | |
596 | { | |
4d8d9293 RK |
597 | struct nilfs_iget_args args = { |
598 | .ino = ino, .root = NULL, .cno = cno, .for_gc = 1 | |
599 | }; | |
263d90ce RK |
600 | struct inode *inode; |
601 | int err; | |
602 | ||
603 | inode = iget5_locked(sb, ino, nilfs_iget_test, nilfs_iget_set, &args); | |
604 | if (unlikely(!inode)) | |
605 | return ERR_PTR(-ENOMEM); | |
606 | if (!(inode->i_state & I_NEW)) | |
607 | return inode; | |
608 | ||
609 | err = nilfs_init_gcinode(inode); | |
610 | if (unlikely(err)) { | |
611 | iget_failed(inode); | |
612 | return ERR_PTR(err); | |
613 | } | |
614 | unlock_new_inode(inode); | |
615 | return inode; | |
616 | } | |
617 | ||
05fe58fd RK |
618 | void nilfs_write_inode_common(struct inode *inode, |
619 | struct nilfs_inode *raw_inode, int has_bmap) | |
620 | { | |
621 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
622 | ||
623 | raw_inode->i_mode = cpu_to_le16(inode->i_mode); | |
305d3d0d EB |
624 | raw_inode->i_uid = cpu_to_le32(i_uid_read(inode)); |
625 | raw_inode->i_gid = cpu_to_le32(i_gid_read(inode)); | |
05fe58fd RK |
626 | raw_inode->i_links_count = cpu_to_le16(inode->i_nlink); |
627 | raw_inode->i_size = cpu_to_le64(inode->i_size); | |
628 | raw_inode->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
629 | raw_inode->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec); | |
61239230 RK |
630 | raw_inode->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); |
631 | raw_inode->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec); | |
05fe58fd RK |
632 | raw_inode->i_blocks = cpu_to_le64(inode->i_blocks); |
633 | ||
05fe58fd RK |
634 | raw_inode->i_flags = cpu_to_le32(ii->i_flags); |
635 | raw_inode->i_generation = cpu_to_le32(inode->i_generation); | |
636 | ||
56eb5538 RK |
637 | if (NILFS_ROOT_METADATA_FILE(inode->i_ino)) { |
638 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; | |
639 | ||
640 | /* zero-fill unused portion in the case of super root block */ | |
641 | raw_inode->i_xattr = 0; | |
642 | raw_inode->i_pad = 0; | |
643 | memset((void *)raw_inode + sizeof(*raw_inode), 0, | |
644 | nilfs->ns_inode_size - sizeof(*raw_inode)); | |
645 | } | |
646 | ||
05fe58fd RK |
647 | if (has_bmap) |
648 | nilfs_bmap_write(ii->i_bmap, raw_inode); | |
649 | else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) | |
650 | raw_inode->i_device_code = | |
cdce214e | 651 | cpu_to_le64(huge_encode_dev(inode->i_rdev)); |
076a378b RK |
652 | /* |
653 | * When extending inode, nilfs->ns_inode_size should be checked | |
654 | * for substitutions of appended fields. | |
655 | */ | |
05fe58fd RK |
656 | } |
657 | ||
b9f66140 | 658 | void nilfs_update_inode(struct inode *inode, struct buffer_head *ibh, int flags) |
05fe58fd RK |
659 | { |
660 | ino_t ino = inode->i_ino; | |
661 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
e912a5b6 | 662 | struct inode *ifile = ii->i_root->ifile; |
05fe58fd RK |
663 | struct nilfs_inode *raw_inode; |
664 | ||
e912a5b6 | 665 | raw_inode = nilfs_ifile_map_inode(ifile, ino, ibh); |
05fe58fd | 666 | |
05fe58fd | 667 | if (test_and_clear_bit(NILFS_I_NEW, &ii->i_state)) |
e912a5b6 | 668 | memset(raw_inode, 0, NILFS_MDT(ifile)->mi_entry_size); |
b9f66140 AR |
669 | if (flags & I_DIRTY_DATASYNC) |
670 | set_bit(NILFS_I_INODE_SYNC, &ii->i_state); | |
05fe58fd RK |
671 | |
672 | nilfs_write_inode_common(inode, raw_inode, 0); | |
076a378b RK |
673 | /* |
674 | * XXX: call with has_bmap = 0 is a workaround to avoid | |
675 | * deadlock of bmap. This delays update of i_bmap to just | |
676 | * before writing. | |
677 | */ | |
678 | ||
e912a5b6 | 679 | nilfs_ifile_unmap_inode(ifile, ino, ibh); |
05fe58fd RK |
680 | } |
681 | ||
682 | #define NILFS_MAX_TRUNCATE_BLOCKS 16384 /* 64MB for 4KB block */ | |
683 | ||
684 | static void nilfs_truncate_bmap(struct nilfs_inode_info *ii, | |
685 | unsigned long from) | |
686 | { | |
3568a13f | 687 | __u64 b; |
05fe58fd RK |
688 | int ret; |
689 | ||
690 | if (!test_bit(NILFS_I_BMAP, &ii->i_state)) | |
691 | return; | |
e828949e | 692 | repeat: |
05fe58fd RK |
693 | ret = nilfs_bmap_last_key(ii->i_bmap, &b); |
694 | if (ret == -ENOENT) | |
695 | return; | |
696 | else if (ret < 0) | |
697 | goto failed; | |
698 | ||
699 | if (b < from) | |
700 | return; | |
701 | ||
3568a13f | 702 | b -= min_t(__u64, NILFS_MAX_TRUNCATE_BLOCKS, b - from); |
05fe58fd RK |
703 | ret = nilfs_bmap_truncate(ii->i_bmap, b); |
704 | nilfs_relax_pressure_in_lock(ii->vfs_inode.i_sb); | |
705 | if (!ret || (ret == -ENOMEM && | |
706 | nilfs_bmap_truncate(ii->i_bmap, b) == 0)) | |
707 | goto repeat; | |
708 | ||
e828949e | 709 | failed: |
a1d0747a JP |
710 | nilfs_warn(ii->vfs_inode.i_sb, "error %d truncating bmap (ino=%lu)", |
711 | ret, ii->vfs_inode.i_ino); | |
05fe58fd RK |
712 | } |
713 | ||
714 | void nilfs_truncate(struct inode *inode) | |
715 | { | |
716 | unsigned long blkoff; | |
717 | unsigned int blocksize; | |
718 | struct nilfs_transaction_info ti; | |
719 | struct super_block *sb = inode->i_sb; | |
720 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
05fe58fd RK |
721 | |
722 | if (!test_bit(NILFS_I_BMAP, &ii->i_state)) | |
723 | return; | |
724 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
725 | return; | |
726 | ||
727 | blocksize = sb->s_blocksize; | |
728 | blkoff = (inode->i_size + blocksize - 1) >> sb->s_blocksize_bits; | |
1f5abe7e | 729 | nilfs_transaction_begin(sb, &ti, 0); /* never fails */ |
05fe58fd RK |
730 | |
731 | block_truncate_page(inode->i_mapping, inode->i_size, nilfs_get_block); | |
732 | ||
733 | nilfs_truncate_bmap(ii, blkoff); | |
734 | ||
078cd827 | 735 | inode->i_mtime = inode->i_ctime = current_time(inode); |
05fe58fd RK |
736 | if (IS_SYNC(inode)) |
737 | nilfs_set_transaction_flag(NILFS_TI_SYNC); | |
738 | ||
abdb318b | 739 | nilfs_mark_inode_dirty(inode); |
bcbc8c64 | 740 | nilfs_set_file_dirty(inode, 0); |
47420c79 | 741 | nilfs_transaction_commit(sb); |
076a378b RK |
742 | /* |
743 | * May construct a logical segment and may fail in sync mode. | |
744 | * But truncate has no return value. | |
745 | */ | |
05fe58fd RK |
746 | } |
747 | ||
6fd1e5c9 AV |
748 | static void nilfs_clear_inode(struct inode *inode) |
749 | { | |
750 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
751 | ||
752 | /* | |
753 | * Free resources allocated in nilfs_read_inode(), here. | |
754 | */ | |
755 | BUG_ON(!list_empty(&ii->i_dirty)); | |
756 | brelse(ii->i_bh); | |
757 | ii->i_bh = NULL; | |
758 | ||
2d19961d RK |
759 | if (nilfs_is_metadata_file_inode(inode)) |
760 | nilfs_mdt_clear(inode); | |
518d1a6a | 761 | |
6fd1e5c9 AV |
762 | if (test_bit(NILFS_I_BMAP, &ii->i_state)) |
763 | nilfs_bmap_clear(ii->i_bmap); | |
764 | ||
765 | nilfs_btnode_cache_clear(&ii->i_btnode_cache); | |
4d8d9293 RK |
766 | |
767 | if (ii->i_root && inode->i_ino == NILFS_ROOT_INO) | |
768 | nilfs_put_root(ii->i_root); | |
6fd1e5c9 AV |
769 | } |
770 | ||
771 | void nilfs_evict_inode(struct inode *inode) | |
05fe58fd RK |
772 | { |
773 | struct nilfs_transaction_info ti; | |
774 | struct super_block *sb = inode->i_sb; | |
775 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
25b18d39 | 776 | int ret; |
05fe58fd | 777 | |
4d8d9293 | 778 | if (inode->i_nlink || !ii->i_root || unlikely(is_bad_inode(inode))) { |
91b0abe3 | 779 | truncate_inode_pages_final(&inode->i_data); |
dbd5768f | 780 | clear_inode(inode); |
6fd1e5c9 | 781 | nilfs_clear_inode(inode); |
05fe58fd RK |
782 | return; |
783 | } | |
1f5abe7e RK |
784 | nilfs_transaction_begin(sb, &ti, 0); /* never fails */ |
785 | ||
91b0abe3 | 786 | truncate_inode_pages_final(&inode->i_data); |
05fe58fd | 787 | |
e912a5b6 | 788 | /* TODO: some of the following operations may fail. */ |
05fe58fd | 789 | nilfs_truncate_bmap(ii, 0); |
abdb318b | 790 | nilfs_mark_inode_dirty(inode); |
dbd5768f | 791 | clear_inode(inode); |
e912a5b6 | 792 | |
25b18d39 RK |
793 | ret = nilfs_ifile_delete_inode(ii->i_root->ifile, inode->i_ino); |
794 | if (!ret) | |
e5f7f848 | 795 | atomic64_dec(&ii->i_root->inodes_count); |
e912a5b6 | 796 | |
6fd1e5c9 | 797 | nilfs_clear_inode(inode); |
e912a5b6 | 798 | |
05fe58fd RK |
799 | if (IS_SYNC(inode)) |
800 | nilfs_set_transaction_flag(NILFS_TI_SYNC); | |
47420c79 | 801 | nilfs_transaction_commit(sb); |
076a378b RK |
802 | /* |
803 | * May construct a logical segment and may fail in sync mode. | |
804 | * But delete_inode has no return value. | |
805 | */ | |
05fe58fd RK |
806 | } |
807 | ||
808 | int nilfs_setattr(struct dentry *dentry, struct iattr *iattr) | |
809 | { | |
810 | struct nilfs_transaction_info ti; | |
2b0143b5 | 811 | struct inode *inode = d_inode(dentry); |
05fe58fd | 812 | struct super_block *sb = inode->i_sb; |
47420c79 | 813 | int err; |
05fe58fd | 814 | |
31051c85 | 815 | err = setattr_prepare(dentry, iattr); |
05fe58fd RK |
816 | if (err) |
817 | return err; | |
818 | ||
819 | err = nilfs_transaction_begin(sb, &ti, 0); | |
820 | if (unlikely(err)) | |
821 | return err; | |
1025774c CH |
822 | |
823 | if ((iattr->ia_valid & ATTR_SIZE) && | |
824 | iattr->ia_size != i_size_read(inode)) { | |
562c72aa | 825 | inode_dio_wait(inode); |
2d1b399b MS |
826 | truncate_setsize(inode, iattr->ia_size); |
827 | nilfs_truncate(inode); | |
1025774c CH |
828 | } |
829 | ||
830 | setattr_copy(inode, iattr); | |
831 | mark_inode_dirty(inode); | |
832 | ||
833 | if (iattr->ia_valid & ATTR_MODE) { | |
05fe58fd | 834 | err = nilfs_acl_chmod(inode); |
1025774c CH |
835 | if (unlikely(err)) |
836 | goto out_err; | |
837 | } | |
838 | ||
839 | return nilfs_transaction_commit(sb); | |
47420c79 | 840 | |
1025774c CH |
841 | out_err: |
842 | nilfs_transaction_abort(sb); | |
47420c79 | 843 | return err; |
05fe58fd RK |
844 | } |
845 | ||
10556cb2 | 846 | int nilfs_permission(struct inode *inode, int mask) |
dc3d3b81 | 847 | { |
730e908f | 848 | struct nilfs_root *root = NILFS_I(inode)->i_root; |
4ad364ca | 849 | |
dc3d3b81 RK |
850 | if ((mask & MAY_WRITE) && root && |
851 | root->cno != NILFS_CPTREE_CURRENT_CNO) | |
852 | return -EROFS; /* snapshot is not writable */ | |
853 | ||
2830ba7f | 854 | return generic_permission(inode, mask); |
dc3d3b81 RK |
855 | } |
856 | ||
bcbc8c64 | 857 | int nilfs_load_inode_block(struct inode *inode, struct buffer_head **pbh) |
05fe58fd | 858 | { |
e3154e97 | 859 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
05fe58fd RK |
860 | struct nilfs_inode_info *ii = NILFS_I(inode); |
861 | int err; | |
862 | ||
693dd321 | 863 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd | 864 | if (ii->i_bh == NULL) { |
693dd321 | 865 | spin_unlock(&nilfs->ns_inode_lock); |
e912a5b6 RK |
866 | err = nilfs_ifile_get_inode_block(ii->i_root->ifile, |
867 | inode->i_ino, pbh); | |
05fe58fd RK |
868 | if (unlikely(err)) |
869 | return err; | |
693dd321 | 870 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd RK |
871 | if (ii->i_bh == NULL) |
872 | ii->i_bh = *pbh; | |
873 | else { | |
874 | brelse(*pbh); | |
875 | *pbh = ii->i_bh; | |
876 | } | |
877 | } else | |
878 | *pbh = ii->i_bh; | |
879 | ||
880 | get_bh(*pbh); | |
693dd321 | 881 | spin_unlock(&nilfs->ns_inode_lock); |
05fe58fd RK |
882 | return 0; |
883 | } | |
884 | ||
885 | int nilfs_inode_dirty(struct inode *inode) | |
886 | { | |
887 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
e3154e97 | 888 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
05fe58fd RK |
889 | int ret = 0; |
890 | ||
891 | if (!list_empty(&ii->i_dirty)) { | |
693dd321 | 892 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd RK |
893 | ret = test_bit(NILFS_I_DIRTY, &ii->i_state) || |
894 | test_bit(NILFS_I_BUSY, &ii->i_state); | |
693dd321 | 895 | spin_unlock(&nilfs->ns_inode_lock); |
05fe58fd RK |
896 | } |
897 | return ret; | |
898 | } | |
899 | ||
0c6c44cb | 900 | int nilfs_set_file_dirty(struct inode *inode, unsigned int nr_dirty) |
05fe58fd RK |
901 | { |
902 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
e3154e97 | 903 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
05fe58fd | 904 | |
693dd321 | 905 | atomic_add(nr_dirty, &nilfs->ns_ndirtyblks); |
05fe58fd | 906 | |
458c5b08 | 907 | if (test_and_set_bit(NILFS_I_DIRTY, &ii->i_state)) |
05fe58fd RK |
908 | return 0; |
909 | ||
693dd321 | 910 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd RK |
911 | if (!test_bit(NILFS_I_QUEUED, &ii->i_state) && |
912 | !test_bit(NILFS_I_BUSY, &ii->i_state)) { | |
076a378b RK |
913 | /* |
914 | * Because this routine may race with nilfs_dispose_list(), | |
915 | * we have to check NILFS_I_QUEUED here, too. | |
916 | */ | |
05fe58fd | 917 | if (list_empty(&ii->i_dirty) && igrab(inode) == NULL) { |
076a378b RK |
918 | /* |
919 | * This will happen when somebody is freeing | |
920 | * this inode. | |
921 | */ | |
a1d0747a JP |
922 | nilfs_warn(inode->i_sb, |
923 | "cannot set file dirty (ino=%lu): the file is being freed", | |
924 | inode->i_ino); | |
693dd321 | 925 | spin_unlock(&nilfs->ns_inode_lock); |
076a378b RK |
926 | return -EINVAL; /* |
927 | * NILFS_I_DIRTY may remain for | |
928 | * freeing inode. | |
929 | */ | |
05fe58fd | 930 | } |
eaae0f37 | 931 | list_move_tail(&ii->i_dirty, &nilfs->ns_dirty_files); |
05fe58fd RK |
932 | set_bit(NILFS_I_QUEUED, &ii->i_state); |
933 | } | |
693dd321 | 934 | spin_unlock(&nilfs->ns_inode_lock); |
05fe58fd RK |
935 | return 0; |
936 | } | |
937 | ||
b9f66140 | 938 | int __nilfs_mark_inode_dirty(struct inode *inode, int flags) |
05fe58fd | 939 | { |
05fe58fd RK |
940 | struct buffer_head *ibh; |
941 | int err; | |
942 | ||
bcbc8c64 | 943 | err = nilfs_load_inode_block(inode, &ibh); |
05fe58fd | 944 | if (unlikely(err)) { |
a1d0747a JP |
945 | nilfs_warn(inode->i_sb, |
946 | "cannot mark inode dirty (ino=%lu): error %d loading inode block", | |
947 | inode->i_ino, err); | |
05fe58fd RK |
948 | return err; |
949 | } | |
b9f66140 | 950 | nilfs_update_inode(inode, ibh, flags); |
5fc7b141 | 951 | mark_buffer_dirty(ibh); |
e912a5b6 | 952 | nilfs_mdt_mark_dirty(NILFS_I(inode)->i_root->ifile); |
05fe58fd RK |
953 | brelse(ibh); |
954 | return 0; | |
955 | } | |
956 | ||
957 | /** | |
958 | * nilfs_dirty_inode - reflect changes on given inode to an inode block. | |
959 | * @inode: inode of the file to be registered. | |
960 | * | |
961 | * nilfs_dirty_inode() loads a inode block containing the specified | |
962 | * @inode and copies data from a nilfs_inode to a corresponding inode | |
963 | * entry in the inode block. This operation is excluded from the segment | |
964 | * construction. This function can be called both as a single operation | |
965 | * and as a part of indivisible file operations. | |
966 | */ | |
aa385729 | 967 | void nilfs_dirty_inode(struct inode *inode, int flags) |
05fe58fd RK |
968 | { |
969 | struct nilfs_transaction_info ti; | |
7d6cd92f | 970 | struct nilfs_mdt_info *mdi = NILFS_MDT(inode); |
05fe58fd RK |
971 | |
972 | if (is_bad_inode(inode)) { | |
a1d0747a JP |
973 | nilfs_warn(inode->i_sb, |
974 | "tried to mark bad_inode dirty. ignored."); | |
05fe58fd RK |
975 | dump_stack(); |
976 | return; | |
977 | } | |
7d6cd92f RK |
978 | if (mdi) { |
979 | nilfs_mdt_mark_dirty(inode); | |
980 | return; | |
981 | } | |
05fe58fd | 982 | nilfs_transaction_begin(inode->i_sb, &ti, 0); |
b9f66140 | 983 | __nilfs_mark_inode_dirty(inode, flags); |
47420c79 | 984 | nilfs_transaction_commit(inode->i_sb); /* never fails */ |
05fe58fd | 985 | } |
622daaff RK |
986 | |
987 | int nilfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, | |
988 | __u64 start, __u64 len) | |
989 | { | |
0ef28f9a | 990 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
622daaff RK |
991 | __u64 logical = 0, phys = 0, size = 0; |
992 | __u32 flags = 0; | |
993 | loff_t isize; | |
994 | sector_t blkoff, end_blkoff; | |
995 | sector_t delalloc_blkoff; | |
996 | unsigned long delalloc_blklen; | |
997 | unsigned int blkbits = inode->i_blkbits; | |
998 | int ret, n; | |
999 | ||
45dd052e | 1000 | ret = fiemap_prep(inode, fieinfo, start, &len, 0); |
622daaff RK |
1001 | if (ret) |
1002 | return ret; | |
1003 | ||
5955102c | 1004 | inode_lock(inode); |
622daaff RK |
1005 | |
1006 | isize = i_size_read(inode); | |
1007 | ||
1008 | blkoff = start >> blkbits; | |
1009 | end_blkoff = (start + len - 1) >> blkbits; | |
1010 | ||
1011 | delalloc_blklen = nilfs_find_uncommitted_extent(inode, blkoff, | |
1012 | &delalloc_blkoff); | |
1013 | ||
1014 | do { | |
1015 | __u64 blkphy; | |
1016 | unsigned int maxblocks; | |
1017 | ||
1018 | if (delalloc_blklen && blkoff == delalloc_blkoff) { | |
1019 | if (size) { | |
1020 | /* End of the current extent */ | |
1021 | ret = fiemap_fill_next_extent( | |
1022 | fieinfo, logical, phys, size, flags); | |
1023 | if (ret) | |
1024 | break; | |
1025 | } | |
1026 | if (blkoff > end_blkoff) | |
1027 | break; | |
1028 | ||
1029 | flags = FIEMAP_EXTENT_MERGED | FIEMAP_EXTENT_DELALLOC; | |
1030 | logical = blkoff << blkbits; | |
1031 | phys = 0; | |
1032 | size = delalloc_blklen << blkbits; | |
1033 | ||
1034 | blkoff = delalloc_blkoff + delalloc_blklen; | |
1035 | delalloc_blklen = nilfs_find_uncommitted_extent( | |
1036 | inode, blkoff, &delalloc_blkoff); | |
1037 | continue; | |
1038 | } | |
1039 | ||
1040 | /* | |
1041 | * Limit the number of blocks that we look up so as | |
1042 | * not to get into the next delayed allocation extent. | |
1043 | */ | |
1044 | maxblocks = INT_MAX; | |
1045 | if (delalloc_blklen) | |
1046 | maxblocks = min_t(sector_t, delalloc_blkoff - blkoff, | |
1047 | maxblocks); | |
1048 | blkphy = 0; | |
1049 | ||
1050 | down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); | |
1051 | n = nilfs_bmap_lookup_contig( | |
1052 | NILFS_I(inode)->i_bmap, blkoff, &blkphy, maxblocks); | |
1053 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); | |
1054 | ||
1055 | if (n < 0) { | |
1056 | int past_eof; | |
1057 | ||
1058 | if (unlikely(n != -ENOENT)) | |
1059 | break; /* error */ | |
1060 | ||
1061 | /* HOLE */ | |
1062 | blkoff++; | |
1063 | past_eof = ((blkoff << blkbits) >= isize); | |
1064 | ||
1065 | if (size) { | |
1066 | /* End of the current extent */ | |
1067 | ||
1068 | if (past_eof) | |
1069 | flags |= FIEMAP_EXTENT_LAST; | |
1070 | ||
1071 | ret = fiemap_fill_next_extent( | |
1072 | fieinfo, logical, phys, size, flags); | |
1073 | if (ret) | |
1074 | break; | |
1075 | size = 0; | |
1076 | } | |
1077 | if (blkoff > end_blkoff || past_eof) | |
1078 | break; | |
1079 | } else { | |
1080 | if (size) { | |
1081 | if (phys && blkphy << blkbits == phys + size) { | |
1082 | /* The current extent goes on */ | |
1083 | size += n << blkbits; | |
1084 | } else { | |
1085 | /* Terminate the current extent */ | |
1086 | ret = fiemap_fill_next_extent( | |
1087 | fieinfo, logical, phys, size, | |
1088 | flags); | |
1089 | if (ret || blkoff > end_blkoff) | |
1090 | break; | |
1091 | ||
1092 | /* Start another extent */ | |
1093 | flags = FIEMAP_EXTENT_MERGED; | |
1094 | logical = blkoff << blkbits; | |
1095 | phys = blkphy << blkbits; | |
1096 | size = n << blkbits; | |
1097 | } | |
1098 | } else { | |
1099 | /* Start a new extent */ | |
1100 | flags = FIEMAP_EXTENT_MERGED; | |
1101 | logical = blkoff << blkbits; | |
1102 | phys = blkphy << blkbits; | |
1103 | size = n << blkbits; | |
1104 | } | |
1105 | blkoff += n; | |
1106 | } | |
1107 | cond_resched(); | |
1108 | } while (true); | |
1109 | ||
1110 | /* If ret is 1 then we just hit the end of the extent array */ | |
1111 | if (ret == 1) | |
1112 | ret = 0; | |
1113 | ||
5955102c | 1114 | inode_unlock(inode); |
622daaff RK |
1115 | return ret; |
1116 | } |