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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> |
05fe58fd | 17 | #include "nilfs.h" |
6fd1e5c9 | 18 | #include "btnode.h" |
05fe58fd RK |
19 | #include "segment.h" |
20 | #include "page.h" | |
21 | #include "mdt.h" | |
22 | #include "cpfile.h" | |
23 | #include "ifile.h" | |
24 | ||
f5974c8f VD |
25 | /** |
26 | * struct nilfs_iget_args - arguments used during comparison between inodes | |
27 | * @ino: inode number | |
28 | * @cno: checkpoint number | |
29 | * @root: pointer on NILFS root object (mounted checkpoint) | |
30 | * @for_gc: inode for GC flag | |
31 | */ | |
0e14a359 RK |
32 | struct nilfs_iget_args { |
33 | u64 ino; | |
34 | __u64 cno; | |
4d8d9293 | 35 | struct nilfs_root *root; |
0e14a359 RK |
36 | int for_gc; |
37 | }; | |
05fe58fd | 38 | |
705304a8 RK |
39 | static int nilfs_iget_test(struct inode *inode, void *opaque); |
40 | ||
be667377 RK |
41 | void nilfs_inode_add_blocks(struct inode *inode, int n) |
42 | { | |
43 | struct nilfs_root *root = NILFS_I(inode)->i_root; | |
44 | ||
93407472 | 45 | inode_add_bytes(inode, i_blocksize(inode) * n); |
be667377 | 46 | if (root) |
e5f7f848 | 47 | atomic64_add(n, &root->blocks_count); |
be667377 RK |
48 | } |
49 | ||
50 | void nilfs_inode_sub_blocks(struct inode *inode, int n) | |
51 | { | |
52 | struct nilfs_root *root = NILFS_I(inode)->i_root; | |
53 | ||
93407472 | 54 | inode_sub_bytes(inode, i_blocksize(inode) * n); |
be667377 | 55 | if (root) |
e5f7f848 | 56 | atomic64_sub(n, &root->blocks_count); |
be667377 RK |
57 | } |
58 | ||
05fe58fd RK |
59 | /** |
60 | * nilfs_get_block() - get a file block on the filesystem (callback function) | |
61 | * @inode - inode struct of the target file | |
62 | * @blkoff - file block number | |
63 | * @bh_result - buffer head to be mapped on | |
64 | * @create - indicate whether allocating the block or not when it has not | |
65 | * been allocated yet. | |
66 | * | |
67 | * This function does not issue actual read request of the specified data | |
68 | * block. It is done by VFS. | |
05fe58fd RK |
69 | */ |
70 | int nilfs_get_block(struct inode *inode, sector_t blkoff, | |
71 | struct buffer_head *bh_result, int create) | |
72 | { | |
73 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
0ef28f9a | 74 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
c3a7abf0 | 75 | __u64 blknum = 0; |
05fe58fd | 76 | int err = 0, ret; |
0c6c44cb | 77 | unsigned int maxblocks = bh_result->b_size >> inode->i_blkbits; |
05fe58fd | 78 | |
0ef28f9a | 79 | down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
c3a7abf0 | 80 | ret = nilfs_bmap_lookup_contig(ii->i_bmap, blkoff, &blknum, maxblocks); |
0ef28f9a | 81 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
c3a7abf0 | 82 | if (ret >= 0) { /* found */ |
05fe58fd | 83 | map_bh(bh_result, inode->i_sb, blknum); |
c3a7abf0 RK |
84 | if (ret > 0) |
85 | bh_result->b_size = (ret << inode->i_blkbits); | |
05fe58fd RK |
86 | goto out; |
87 | } | |
05fe58fd RK |
88 | /* data block was not found */ |
89 | if (ret == -ENOENT && create) { | |
90 | struct nilfs_transaction_info ti; | |
91 | ||
92 | bh_result->b_blocknr = 0; | |
93 | err = nilfs_transaction_begin(inode->i_sb, &ti, 1); | |
94 | if (unlikely(err)) | |
95 | goto out; | |
3568a13f | 96 | err = nilfs_bmap_insert(ii->i_bmap, blkoff, |
05fe58fd | 97 | (unsigned long)bh_result); |
05fe58fd RK |
98 | if (unlikely(err != 0)) { |
99 | if (err == -EEXIST) { | |
100 | /* | |
101 | * The get_block() function could be called | |
102 | * from multiple callers for an inode. | |
103 | * However, the page having this block must | |
104 | * be locked in this case. | |
105 | */ | |
feee880f RK |
106 | nilfs_msg(inode->i_sb, KERN_WARNING, |
107 | "%s (ino=%lu): a race condition while inserting a data block at offset=%llu", | |
108 | __func__, inode->i_ino, | |
109 | (unsigned long long)blkoff); | |
1f5abe7e | 110 | err = 0; |
05fe58fd | 111 | } |
47420c79 | 112 | nilfs_transaction_abort(inode->i_sb); |
05fe58fd RK |
113 | goto out; |
114 | } | |
b9f66140 | 115 | nilfs_mark_inode_dirty_sync(inode); |
47420c79 | 116 | nilfs_transaction_commit(inode->i_sb); /* never fails */ |
05fe58fd RK |
117 | /* Error handling should be detailed */ |
118 | set_buffer_new(bh_result); | |
27e6c7a3 | 119 | set_buffer_delay(bh_result); |
076a378b RK |
120 | map_bh(bh_result, inode->i_sb, 0); |
121 | /* Disk block number must be changed to proper value */ | |
122 | ||
05fe58fd | 123 | } else if (ret == -ENOENT) { |
076a378b RK |
124 | /* |
125 | * not found is not error (e.g. hole); must return without | |
126 | * the mapped state flag. | |
127 | */ | |
05fe58fd RK |
128 | ; |
129 | } else { | |
130 | err = ret; | |
131 | } | |
132 | ||
133 | out: | |
134 | return err; | |
135 | } | |
136 | ||
137 | /** | |
138 | * nilfs_readpage() - implement readpage() method of nilfs_aops {} | |
139 | * address_space_operations. | |
140 | * @file - file struct of the file to be read | |
141 | * @page - the page to be read | |
142 | */ | |
143 | static int nilfs_readpage(struct file *file, struct page *page) | |
144 | { | |
145 | return mpage_readpage(page, nilfs_get_block); | |
146 | } | |
147 | ||
d4388340 | 148 | static void nilfs_readahead(struct readahead_control *rac) |
05fe58fd | 149 | { |
d4388340 | 150 | mpage_readahead(rac, nilfs_get_block); |
05fe58fd RK |
151 | } |
152 | ||
153 | static int nilfs_writepages(struct address_space *mapping, | |
154 | struct writeback_control *wbc) | |
155 | { | |
f30bf3e4 RK |
156 | struct inode *inode = mapping->host; |
157 | int err = 0; | |
158 | ||
bc98a42c | 159 | if (sb_rdonly(inode->i_sb)) { |
8c26c4e2 VD |
160 | nilfs_clear_dirty_pages(mapping, false); |
161 | return -EROFS; | |
162 | } | |
163 | ||
f30bf3e4 RK |
164 | if (wbc->sync_mode == WB_SYNC_ALL) |
165 | err = nilfs_construct_dsync_segment(inode->i_sb, inode, | |
166 | wbc->range_start, | |
167 | wbc->range_end); | |
168 | return err; | |
05fe58fd RK |
169 | } |
170 | ||
171 | static int nilfs_writepage(struct page *page, struct writeback_control *wbc) | |
172 | { | |
173 | struct inode *inode = page->mapping->host; | |
174 | int err; | |
175 | ||
bc98a42c | 176 | if (sb_rdonly(inode->i_sb)) { |
8c26c4e2 VD |
177 | /* |
178 | * It means that filesystem was remounted in read-only | |
179 | * mode because of error or metadata corruption. But we | |
180 | * have dirty pages that try to be flushed in background. | |
181 | * So, here we simply discard this dirty page. | |
182 | */ | |
183 | nilfs_clear_dirty_page(page, false); | |
184 | unlock_page(page); | |
185 | return -EROFS; | |
186 | } | |
187 | ||
05fe58fd RK |
188 | redirty_page_for_writepage(wbc, page); |
189 | unlock_page(page); | |
190 | ||
191 | if (wbc->sync_mode == WB_SYNC_ALL) { | |
192 | err = nilfs_construct_segment(inode->i_sb); | |
193 | if (unlikely(err)) | |
194 | return err; | |
195 | } else if (wbc->for_reclaim) | |
196 | nilfs_flush_segment(inode->i_sb, inode->i_ino); | |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
201 | static int nilfs_set_page_dirty(struct page *page) | |
202 | { | |
56d7acc7 | 203 | struct inode *inode = page->mapping->host; |
136e8770 | 204 | int ret = __set_page_dirty_nobuffers(page); |
05fe58fd | 205 | |
136e8770 | 206 | if (page_has_buffers(page)) { |
0c6c44cb | 207 | unsigned int nr_dirty = 0; |
136e8770 | 208 | struct buffer_head *bh, *head; |
05fe58fd | 209 | |
136e8770 RK |
210 | /* |
211 | * This page is locked by callers, and no other thread | |
212 | * concurrently marks its buffers dirty since they are | |
213 | * only dirtied through routines in fs/buffer.c in | |
214 | * which call sites of mark_buffer_dirty are protected | |
215 | * by page lock. | |
216 | */ | |
217 | bh = head = page_buffers(page); | |
218 | do { | |
219 | /* Do not mark hole blocks dirty */ | |
220 | if (buffer_dirty(bh) || !buffer_mapped(bh)) | |
221 | continue; | |
222 | ||
223 | set_buffer_dirty(bh); | |
224 | nr_dirty++; | |
225 | } while (bh = bh->b_this_page, bh != head); | |
226 | ||
227 | if (nr_dirty) | |
228 | nilfs_set_file_dirty(inode, nr_dirty); | |
56d7acc7 | 229 | } else if (ret) { |
0c6c44cb | 230 | unsigned int nr_dirty = 1 << (PAGE_SHIFT - inode->i_blkbits); |
56d7acc7 AR |
231 | |
232 | nilfs_set_file_dirty(inode, nr_dirty); | |
05fe58fd RK |
233 | } |
234 | return ret; | |
235 | } | |
236 | ||
2d1b399b MS |
237 | void nilfs_write_failed(struct address_space *mapping, loff_t to) |
238 | { | |
239 | struct inode *inode = mapping->host; | |
240 | ||
241 | if (to > inode->i_size) { | |
7caef267 | 242 | truncate_pagecache(inode, inode->i_size); |
2d1b399b MS |
243 | nilfs_truncate(inode); |
244 | } | |
245 | } | |
246 | ||
05fe58fd RK |
247 | static int nilfs_write_begin(struct file *file, struct address_space *mapping, |
248 | loff_t pos, unsigned len, unsigned flags, | |
249 | struct page **pagep, void **fsdata) | |
250 | ||
251 | { | |
252 | struct inode *inode = mapping->host; | |
253 | int err = nilfs_transaction_begin(inode->i_sb, NULL, 1); | |
254 | ||
255 | if (unlikely(err)) | |
256 | return err; | |
257 | ||
155130a4 CH |
258 | err = block_write_begin(mapping, pos, len, flags, pagep, |
259 | nilfs_get_block); | |
260 | if (unlikely(err)) { | |
2d1b399b | 261 | nilfs_write_failed(mapping, pos + len); |
47420c79 | 262 | nilfs_transaction_abort(inode->i_sb); |
155130a4 | 263 | } |
05fe58fd RK |
264 | return err; |
265 | } | |
266 | ||
267 | static int nilfs_write_end(struct file *file, struct address_space *mapping, | |
268 | loff_t pos, unsigned len, unsigned copied, | |
269 | struct page *page, void *fsdata) | |
270 | { | |
271 | struct inode *inode = mapping->host; | |
0c6c44cb RK |
272 | unsigned int start = pos & (PAGE_SIZE - 1); |
273 | unsigned int nr_dirty; | |
05fe58fd RK |
274 | int err; |
275 | ||
276 | nr_dirty = nilfs_page_count_clean_buffers(page, start, | |
277 | start + copied); | |
278 | copied = generic_write_end(file, mapping, pos, len, copied, page, | |
279 | fsdata); | |
bcbc8c64 | 280 | nilfs_set_file_dirty(inode, nr_dirty); |
47420c79 | 281 | err = nilfs_transaction_commit(inode->i_sb); |
05fe58fd RK |
282 | return err ? : copied; |
283 | } | |
284 | ||
285 | static ssize_t | |
c8b8e32d | 286 | nilfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
05fe58fd | 287 | { |
6b6dabc8 | 288 | struct inode *inode = file_inode(iocb->ki_filp); |
05fe58fd | 289 | |
6f673763 | 290 | if (iov_iter_rw(iter) == WRITE) |
05fe58fd RK |
291 | return 0; |
292 | ||
293 | /* Needs synchronization with the cleaner */ | |
c8b8e32d | 294 | return blockdev_direct_IO(iocb, inode, iter, nilfs_get_block); |
05fe58fd RK |
295 | } |
296 | ||
7f09410b | 297 | const struct address_space_operations nilfs_aops = { |
05fe58fd RK |
298 | .writepage = nilfs_writepage, |
299 | .readpage = nilfs_readpage, | |
05fe58fd RK |
300 | .writepages = nilfs_writepages, |
301 | .set_page_dirty = nilfs_set_page_dirty, | |
d4388340 | 302 | .readahead = nilfs_readahead, |
05fe58fd RK |
303 | .write_begin = nilfs_write_begin, |
304 | .write_end = nilfs_write_end, | |
305 | /* .releasepage = nilfs_releasepage, */ | |
306 | .invalidatepage = block_invalidatepage, | |
307 | .direct_IO = nilfs_direct_IO, | |
258ef67e | 308 | .is_partially_uptodate = block_is_partially_uptodate, |
05fe58fd RK |
309 | }; |
310 | ||
705304a8 RK |
311 | static int nilfs_insert_inode_locked(struct inode *inode, |
312 | struct nilfs_root *root, | |
313 | unsigned long ino) | |
314 | { | |
315 | struct nilfs_iget_args args = { | |
316 | .ino = ino, .root = root, .cno = 0, .for_gc = 0 | |
317 | }; | |
318 | ||
319 | return insert_inode_locked4(inode, ino, nilfs_iget_test, &args); | |
320 | } | |
321 | ||
c6e49e3f | 322 | struct inode *nilfs_new_inode(struct inode *dir, umode_t mode) |
05fe58fd RK |
323 | { |
324 | struct super_block *sb = dir->i_sb; | |
e3154e97 | 325 | struct the_nilfs *nilfs = sb->s_fs_info; |
05fe58fd RK |
326 | struct inode *inode; |
327 | struct nilfs_inode_info *ii; | |
4d8d9293 | 328 | struct nilfs_root *root; |
05fe58fd RK |
329 | int err = -ENOMEM; |
330 | ino_t ino; | |
331 | ||
332 | inode = new_inode(sb); | |
333 | if (unlikely(!inode)) | |
334 | goto failed; | |
335 | ||
336 | mapping_set_gfp_mask(inode->i_mapping, | |
c62d2555 | 337 | mapping_gfp_constraint(inode->i_mapping, ~__GFP_FS)); |
05fe58fd | 338 | |
4d8d9293 | 339 | root = NILFS_I(dir)->i_root; |
05fe58fd | 340 | ii = NILFS_I(inode); |
4ce5c342 | 341 | ii->i_state = BIT(NILFS_I_NEW); |
4d8d9293 | 342 | ii->i_root = root; |
05fe58fd | 343 | |
e912a5b6 | 344 | err = nilfs_ifile_create_inode(root->ifile, &ino, &ii->i_bh); |
05fe58fd RK |
345 | if (unlikely(err)) |
346 | goto failed_ifile_create_inode; | |
347 | /* reference count of i_bh inherits from nilfs_mdt_read_block() */ | |
348 | ||
e5f7f848 | 349 | atomic64_inc(&root->inodes_count); |
73459dcc | 350 | inode_init_owner(inode, dir, mode); |
05fe58fd | 351 | inode->i_ino = ino; |
078cd827 | 352 | inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); |
05fe58fd RK |
353 | |
354 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) { | |
355 | err = nilfs_bmap_read(ii->i_bmap, NULL); | |
356 | if (err < 0) | |
705304a8 | 357 | goto failed_after_creation; |
05fe58fd RK |
358 | |
359 | set_bit(NILFS_I_BMAP, &ii->i_state); | |
360 | /* No lock is needed; iget() ensures it. */ | |
361 | } | |
362 | ||
b253a3e4 RK |
363 | ii->i_flags = nilfs_mask_flags( |
364 | mode, NILFS_I(dir)->i_flags & NILFS_FL_INHERITED); | |
05fe58fd RK |
365 | |
366 | /* ii->i_file_acl = 0; */ | |
367 | /* ii->i_dir_acl = 0; */ | |
05fe58fd | 368 | ii->i_dir_start_lookup = 0; |
05fe58fd | 369 | nilfs_set_inode_flags(inode); |
9b1fc4e4 RK |
370 | spin_lock(&nilfs->ns_next_gen_lock); |
371 | inode->i_generation = nilfs->ns_next_generation++; | |
372 | spin_unlock(&nilfs->ns_next_gen_lock); | |
705304a8 RK |
373 | if (nilfs_insert_inode_locked(inode, root, ino) < 0) { |
374 | err = -EIO; | |
375 | goto failed_after_creation; | |
376 | } | |
05fe58fd RK |
377 | |
378 | err = nilfs_init_acl(inode, dir); | |
379 | if (unlikely(err)) | |
076a378b RK |
380 | /* |
381 | * Never occur. When supporting nilfs_init_acl(), | |
382 | * proper cancellation of above jobs should be considered. | |
383 | */ | |
384 | goto failed_after_creation; | |
05fe58fd | 385 | |
05fe58fd RK |
386 | return inode; |
387 | ||
705304a8 | 388 | failed_after_creation: |
6d6b77f1 | 389 | clear_nlink(inode); |
705304a8 | 390 | unlock_new_inode(inode); |
076a378b RK |
391 | iput(inode); /* |
392 | * raw_inode will be deleted through | |
393 | * nilfs_evict_inode(). | |
394 | */ | |
05fe58fd RK |
395 | goto failed; |
396 | ||
397 | failed_ifile_create_inode: | |
398 | make_bad_inode(inode); | |
076a378b | 399 | iput(inode); |
05fe58fd RK |
400 | failed: |
401 | return ERR_PTR(err); | |
402 | } | |
403 | ||
05fe58fd RK |
404 | void nilfs_set_inode_flags(struct inode *inode) |
405 | { | |
406 | unsigned int flags = NILFS_I(inode)->i_flags; | |
faea2c53 | 407 | unsigned int new_fl = 0; |
05fe58fd | 408 | |
f0c9f242 | 409 | if (flags & FS_SYNC_FL) |
faea2c53 | 410 | new_fl |= S_SYNC; |
f0c9f242 | 411 | if (flags & FS_APPEND_FL) |
faea2c53 | 412 | new_fl |= S_APPEND; |
f0c9f242 | 413 | if (flags & FS_IMMUTABLE_FL) |
faea2c53 | 414 | new_fl |= S_IMMUTABLE; |
f0c9f242 | 415 | if (flags & FS_NOATIME_FL) |
faea2c53 | 416 | new_fl |= S_NOATIME; |
f0c9f242 | 417 | if (flags & FS_DIRSYNC_FL) |
faea2c53 RK |
418 | new_fl |= S_DIRSYNC; |
419 | inode_set_flags(inode, new_fl, S_SYNC | S_APPEND | S_IMMUTABLE | | |
420 | S_NOATIME | S_DIRSYNC); | |
05fe58fd RK |
421 | } |
422 | ||
423 | int nilfs_read_inode_common(struct inode *inode, | |
424 | struct nilfs_inode *raw_inode) | |
425 | { | |
426 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
427 | int err; | |
428 | ||
429 | inode->i_mode = le16_to_cpu(raw_inode->i_mode); | |
305d3d0d EB |
430 | i_uid_write(inode, le32_to_cpu(raw_inode->i_uid)); |
431 | i_gid_write(inode, le32_to_cpu(raw_inode->i_gid)); | |
bfe86848 | 432 | set_nlink(inode, le16_to_cpu(raw_inode->i_links_count)); |
05fe58fd RK |
433 | inode->i_size = le64_to_cpu(raw_inode->i_size); |
434 | inode->i_atime.tv_sec = le64_to_cpu(raw_inode->i_mtime); | |
435 | inode->i_ctime.tv_sec = le64_to_cpu(raw_inode->i_ctime); | |
436 | inode->i_mtime.tv_sec = le64_to_cpu(raw_inode->i_mtime); | |
61239230 RK |
437 | inode->i_atime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec); |
438 | inode->i_ctime.tv_nsec = le32_to_cpu(raw_inode->i_ctime_nsec); | |
439 | inode->i_mtime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec); | |
705304a8 RK |
440 | if (inode->i_nlink == 0) |
441 | return -ESTALE; /* this inode is deleted */ | |
05fe58fd RK |
442 | |
443 | inode->i_blocks = le64_to_cpu(raw_inode->i_blocks); | |
444 | ii->i_flags = le32_to_cpu(raw_inode->i_flags); | |
445 | #if 0 | |
446 | ii->i_file_acl = le32_to_cpu(raw_inode->i_file_acl); | |
447 | ii->i_dir_acl = S_ISREG(inode->i_mode) ? | |
448 | 0 : le32_to_cpu(raw_inode->i_dir_acl); | |
449 | #endif | |
3cc811bf | 450 | ii->i_dir_start_lookup = 0; |
05fe58fd RK |
451 | inode->i_generation = le32_to_cpu(raw_inode->i_generation); |
452 | ||
453 | if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
454 | S_ISLNK(inode->i_mode)) { | |
455 | err = nilfs_bmap_read(ii->i_bmap, raw_inode); | |
456 | if (err < 0) | |
457 | return err; | |
458 | set_bit(NILFS_I_BMAP, &ii->i_state); | |
459 | /* No lock is needed; iget() ensures it. */ | |
460 | } | |
461 | return 0; | |
462 | } | |
463 | ||
e912a5b6 RK |
464 | static int __nilfs_read_inode(struct super_block *sb, |
465 | struct nilfs_root *root, unsigned long ino, | |
05fe58fd RK |
466 | struct inode *inode) |
467 | { | |
e3154e97 | 468 | struct the_nilfs *nilfs = sb->s_fs_info; |
05fe58fd RK |
469 | struct buffer_head *bh; |
470 | struct nilfs_inode *raw_inode; | |
471 | int err; | |
472 | ||
365e215c | 473 | down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
e912a5b6 | 474 | err = nilfs_ifile_get_inode_block(root->ifile, ino, &bh); |
05fe58fd RK |
475 | if (unlikely(err)) |
476 | goto bad_inode; | |
477 | ||
e912a5b6 | 478 | raw_inode = nilfs_ifile_map_inode(root->ifile, ino, bh); |
05fe58fd | 479 | |
1b2f5a64 RK |
480 | err = nilfs_read_inode_common(inode, raw_inode); |
481 | if (err) | |
05fe58fd RK |
482 | goto failed_unmap; |
483 | ||
484 | if (S_ISREG(inode->i_mode)) { | |
485 | inode->i_op = &nilfs_file_inode_operations; | |
486 | inode->i_fop = &nilfs_file_operations; | |
487 | inode->i_mapping->a_ops = &nilfs_aops; | |
05fe58fd RK |
488 | } else if (S_ISDIR(inode->i_mode)) { |
489 | inode->i_op = &nilfs_dir_inode_operations; | |
490 | inode->i_fop = &nilfs_dir_operations; | |
491 | inode->i_mapping->a_ops = &nilfs_aops; | |
492 | } else if (S_ISLNK(inode->i_mode)) { | |
493 | inode->i_op = &nilfs_symlink_inode_operations; | |
21fc61c7 | 494 | inode_nohighmem(inode); |
05fe58fd RK |
495 | inode->i_mapping->a_ops = &nilfs_aops; |
496 | } else { | |
497 | inode->i_op = &nilfs_special_inode_operations; | |
498 | init_special_inode( | |
499 | inode, inode->i_mode, | |
cdce214e | 500 | huge_decode_dev(le64_to_cpu(raw_inode->i_device_code))); |
05fe58fd | 501 | } |
e912a5b6 | 502 | nilfs_ifile_unmap_inode(root->ifile, ino, bh); |
05fe58fd | 503 | brelse(bh); |
365e215c | 504 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
05fe58fd | 505 | nilfs_set_inode_flags(inode); |
0ce187c4 | 506 | mapping_set_gfp_mask(inode->i_mapping, |
c62d2555 | 507 | mapping_gfp_constraint(inode->i_mapping, ~__GFP_FS)); |
05fe58fd RK |
508 | return 0; |
509 | ||
510 | failed_unmap: | |
e912a5b6 | 511 | nilfs_ifile_unmap_inode(root->ifile, ino, bh); |
05fe58fd RK |
512 | brelse(bh); |
513 | ||
514 | bad_inode: | |
365e215c | 515 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
05fe58fd RK |
516 | return err; |
517 | } | |
518 | ||
0e14a359 RK |
519 | static int nilfs_iget_test(struct inode *inode, void *opaque) |
520 | { | |
521 | struct nilfs_iget_args *args = opaque; | |
522 | struct nilfs_inode_info *ii; | |
523 | ||
4d8d9293 | 524 | if (args->ino != inode->i_ino || args->root != NILFS_I(inode)->i_root) |
0e14a359 RK |
525 | return 0; |
526 | ||
527 | ii = NILFS_I(inode); | |
528 | if (!test_bit(NILFS_I_GCINODE, &ii->i_state)) | |
529 | return !args->for_gc; | |
530 | ||
531 | return args->for_gc && args->cno == ii->i_cno; | |
532 | } | |
533 | ||
534 | static int nilfs_iget_set(struct inode *inode, void *opaque) | |
535 | { | |
536 | struct nilfs_iget_args *args = opaque; | |
537 | ||
538 | inode->i_ino = args->ino; | |
539 | if (args->for_gc) { | |
4ce5c342 | 540 | NILFS_I(inode)->i_state = BIT(NILFS_I_GCINODE); |
0e14a359 | 541 | NILFS_I(inode)->i_cno = args->cno; |
4d8d9293 RK |
542 | NILFS_I(inode)->i_root = NULL; |
543 | } else { | |
544 | if (args->root && args->ino == NILFS_ROOT_INO) | |
545 | nilfs_get_root(args->root); | |
546 | NILFS_I(inode)->i_root = args->root; | |
0e14a359 RK |
547 | } |
548 | return 0; | |
549 | } | |
550 | ||
032dbb3b RK |
551 | struct inode *nilfs_ilookup(struct super_block *sb, struct nilfs_root *root, |
552 | unsigned long ino) | |
553 | { | |
554 | struct nilfs_iget_args args = { | |
555 | .ino = ino, .root = root, .cno = 0, .for_gc = 0 | |
556 | }; | |
557 | ||
558 | return ilookup5(sb, ino, nilfs_iget_test, &args); | |
559 | } | |
560 | ||
f1e89c86 RK |
561 | struct inode *nilfs_iget_locked(struct super_block *sb, struct nilfs_root *root, |
562 | unsigned long ino) | |
05fe58fd | 563 | { |
4d8d9293 RK |
564 | struct nilfs_iget_args args = { |
565 | .ino = ino, .root = root, .cno = 0, .for_gc = 0 | |
566 | }; | |
f1e89c86 RK |
567 | |
568 | return iget5_locked(sb, ino, nilfs_iget_test, nilfs_iget_set, &args); | |
569 | } | |
570 | ||
571 | struct inode *nilfs_iget(struct super_block *sb, struct nilfs_root *root, | |
572 | unsigned long ino) | |
573 | { | |
05fe58fd RK |
574 | struct inode *inode; |
575 | int err; | |
576 | ||
f1e89c86 | 577 | inode = nilfs_iget_locked(sb, root, ino); |
05fe58fd RK |
578 | if (unlikely(!inode)) |
579 | return ERR_PTR(-ENOMEM); | |
580 | if (!(inode->i_state & I_NEW)) | |
581 | return inode; | |
582 | ||
e912a5b6 | 583 | err = __nilfs_read_inode(sb, root, ino, inode); |
05fe58fd RK |
584 | if (unlikely(err)) { |
585 | iget_failed(inode); | |
586 | return ERR_PTR(err); | |
587 | } | |
588 | unlock_new_inode(inode); | |
589 | return inode; | |
590 | } | |
591 | ||
263d90ce RK |
592 | struct inode *nilfs_iget_for_gc(struct super_block *sb, unsigned long ino, |
593 | __u64 cno) | |
594 | { | |
4d8d9293 RK |
595 | struct nilfs_iget_args args = { |
596 | .ino = ino, .root = NULL, .cno = cno, .for_gc = 1 | |
597 | }; | |
263d90ce RK |
598 | struct inode *inode; |
599 | int err; | |
600 | ||
601 | inode = iget5_locked(sb, ino, nilfs_iget_test, nilfs_iget_set, &args); | |
602 | if (unlikely(!inode)) | |
603 | return ERR_PTR(-ENOMEM); | |
604 | if (!(inode->i_state & I_NEW)) | |
605 | return inode; | |
606 | ||
607 | err = nilfs_init_gcinode(inode); | |
608 | if (unlikely(err)) { | |
609 | iget_failed(inode); | |
610 | return ERR_PTR(err); | |
611 | } | |
612 | unlock_new_inode(inode); | |
613 | return inode; | |
614 | } | |
615 | ||
05fe58fd RK |
616 | void nilfs_write_inode_common(struct inode *inode, |
617 | struct nilfs_inode *raw_inode, int has_bmap) | |
618 | { | |
619 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
620 | ||
621 | raw_inode->i_mode = cpu_to_le16(inode->i_mode); | |
305d3d0d EB |
622 | raw_inode->i_uid = cpu_to_le32(i_uid_read(inode)); |
623 | raw_inode->i_gid = cpu_to_le32(i_gid_read(inode)); | |
05fe58fd RK |
624 | raw_inode->i_links_count = cpu_to_le16(inode->i_nlink); |
625 | raw_inode->i_size = cpu_to_le64(inode->i_size); | |
626 | raw_inode->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
627 | raw_inode->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec); | |
61239230 RK |
628 | raw_inode->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); |
629 | raw_inode->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec); | |
05fe58fd RK |
630 | raw_inode->i_blocks = cpu_to_le64(inode->i_blocks); |
631 | ||
05fe58fd RK |
632 | raw_inode->i_flags = cpu_to_le32(ii->i_flags); |
633 | raw_inode->i_generation = cpu_to_le32(inode->i_generation); | |
634 | ||
56eb5538 RK |
635 | if (NILFS_ROOT_METADATA_FILE(inode->i_ino)) { |
636 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; | |
637 | ||
638 | /* zero-fill unused portion in the case of super root block */ | |
639 | raw_inode->i_xattr = 0; | |
640 | raw_inode->i_pad = 0; | |
641 | memset((void *)raw_inode + sizeof(*raw_inode), 0, | |
642 | nilfs->ns_inode_size - sizeof(*raw_inode)); | |
643 | } | |
644 | ||
05fe58fd RK |
645 | if (has_bmap) |
646 | nilfs_bmap_write(ii->i_bmap, raw_inode); | |
647 | else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) | |
648 | raw_inode->i_device_code = | |
cdce214e | 649 | cpu_to_le64(huge_encode_dev(inode->i_rdev)); |
076a378b RK |
650 | /* |
651 | * When extending inode, nilfs->ns_inode_size should be checked | |
652 | * for substitutions of appended fields. | |
653 | */ | |
05fe58fd RK |
654 | } |
655 | ||
b9f66140 | 656 | void nilfs_update_inode(struct inode *inode, struct buffer_head *ibh, int flags) |
05fe58fd RK |
657 | { |
658 | ino_t ino = inode->i_ino; | |
659 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
e912a5b6 | 660 | struct inode *ifile = ii->i_root->ifile; |
05fe58fd RK |
661 | struct nilfs_inode *raw_inode; |
662 | ||
e912a5b6 | 663 | raw_inode = nilfs_ifile_map_inode(ifile, ino, ibh); |
05fe58fd | 664 | |
05fe58fd | 665 | if (test_and_clear_bit(NILFS_I_NEW, &ii->i_state)) |
e912a5b6 | 666 | memset(raw_inode, 0, NILFS_MDT(ifile)->mi_entry_size); |
b9f66140 AR |
667 | if (flags & I_DIRTY_DATASYNC) |
668 | set_bit(NILFS_I_INODE_SYNC, &ii->i_state); | |
05fe58fd RK |
669 | |
670 | nilfs_write_inode_common(inode, raw_inode, 0); | |
076a378b RK |
671 | /* |
672 | * XXX: call with has_bmap = 0 is a workaround to avoid | |
673 | * deadlock of bmap. This delays update of i_bmap to just | |
674 | * before writing. | |
675 | */ | |
676 | ||
e912a5b6 | 677 | nilfs_ifile_unmap_inode(ifile, ino, ibh); |
05fe58fd RK |
678 | } |
679 | ||
680 | #define NILFS_MAX_TRUNCATE_BLOCKS 16384 /* 64MB for 4KB block */ | |
681 | ||
682 | static void nilfs_truncate_bmap(struct nilfs_inode_info *ii, | |
683 | unsigned long from) | |
684 | { | |
3568a13f | 685 | __u64 b; |
05fe58fd RK |
686 | int ret; |
687 | ||
688 | if (!test_bit(NILFS_I_BMAP, &ii->i_state)) | |
689 | return; | |
e828949e | 690 | repeat: |
05fe58fd RK |
691 | ret = nilfs_bmap_last_key(ii->i_bmap, &b); |
692 | if (ret == -ENOENT) | |
693 | return; | |
694 | else if (ret < 0) | |
695 | goto failed; | |
696 | ||
697 | if (b < from) | |
698 | return; | |
699 | ||
3568a13f | 700 | b -= min_t(__u64, NILFS_MAX_TRUNCATE_BLOCKS, b - from); |
05fe58fd RK |
701 | ret = nilfs_bmap_truncate(ii->i_bmap, b); |
702 | nilfs_relax_pressure_in_lock(ii->vfs_inode.i_sb); | |
703 | if (!ret || (ret == -ENOMEM && | |
704 | nilfs_bmap_truncate(ii->i_bmap, b) == 0)) | |
705 | goto repeat; | |
706 | ||
e828949e | 707 | failed: |
d6517deb RK |
708 | nilfs_msg(ii->vfs_inode.i_sb, KERN_WARNING, |
709 | "error %d truncating bmap (ino=%lu)", ret, | |
710 | ii->vfs_inode.i_ino); | |
05fe58fd RK |
711 | } |
712 | ||
713 | void nilfs_truncate(struct inode *inode) | |
714 | { | |
715 | unsigned long blkoff; | |
716 | unsigned int blocksize; | |
717 | struct nilfs_transaction_info ti; | |
718 | struct super_block *sb = inode->i_sb; | |
719 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
05fe58fd RK |
720 | |
721 | if (!test_bit(NILFS_I_BMAP, &ii->i_state)) | |
722 | return; | |
723 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
724 | return; | |
725 | ||
726 | blocksize = sb->s_blocksize; | |
727 | blkoff = (inode->i_size + blocksize - 1) >> sb->s_blocksize_bits; | |
1f5abe7e | 728 | nilfs_transaction_begin(sb, &ti, 0); /* never fails */ |
05fe58fd RK |
729 | |
730 | block_truncate_page(inode->i_mapping, inode->i_size, nilfs_get_block); | |
731 | ||
732 | nilfs_truncate_bmap(ii, blkoff); | |
733 | ||
078cd827 | 734 | inode->i_mtime = inode->i_ctime = current_time(inode); |
05fe58fd RK |
735 | if (IS_SYNC(inode)) |
736 | nilfs_set_transaction_flag(NILFS_TI_SYNC); | |
737 | ||
abdb318b | 738 | nilfs_mark_inode_dirty(inode); |
bcbc8c64 | 739 | nilfs_set_file_dirty(inode, 0); |
47420c79 | 740 | nilfs_transaction_commit(sb); |
076a378b RK |
741 | /* |
742 | * May construct a logical segment and may fail in sync mode. | |
743 | * But truncate has no return value. | |
744 | */ | |
05fe58fd RK |
745 | } |
746 | ||
6fd1e5c9 AV |
747 | static void nilfs_clear_inode(struct inode *inode) |
748 | { | |
749 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
750 | ||
751 | /* | |
752 | * Free resources allocated in nilfs_read_inode(), here. | |
753 | */ | |
754 | BUG_ON(!list_empty(&ii->i_dirty)); | |
755 | brelse(ii->i_bh); | |
756 | ii->i_bh = NULL; | |
757 | ||
2d19961d RK |
758 | if (nilfs_is_metadata_file_inode(inode)) |
759 | nilfs_mdt_clear(inode); | |
518d1a6a | 760 | |
6fd1e5c9 AV |
761 | if (test_bit(NILFS_I_BMAP, &ii->i_state)) |
762 | nilfs_bmap_clear(ii->i_bmap); | |
763 | ||
764 | nilfs_btnode_cache_clear(&ii->i_btnode_cache); | |
4d8d9293 RK |
765 | |
766 | if (ii->i_root && inode->i_ino == NILFS_ROOT_INO) | |
767 | nilfs_put_root(ii->i_root); | |
6fd1e5c9 AV |
768 | } |
769 | ||
770 | void nilfs_evict_inode(struct inode *inode) | |
05fe58fd RK |
771 | { |
772 | struct nilfs_transaction_info ti; | |
773 | struct super_block *sb = inode->i_sb; | |
774 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
25b18d39 | 775 | int ret; |
05fe58fd | 776 | |
4d8d9293 | 777 | if (inode->i_nlink || !ii->i_root || unlikely(is_bad_inode(inode))) { |
91b0abe3 | 778 | truncate_inode_pages_final(&inode->i_data); |
dbd5768f | 779 | clear_inode(inode); |
6fd1e5c9 | 780 | nilfs_clear_inode(inode); |
05fe58fd RK |
781 | return; |
782 | } | |
1f5abe7e RK |
783 | nilfs_transaction_begin(sb, &ti, 0); /* never fails */ |
784 | ||
91b0abe3 | 785 | truncate_inode_pages_final(&inode->i_data); |
05fe58fd | 786 | |
e912a5b6 | 787 | /* TODO: some of the following operations may fail. */ |
05fe58fd | 788 | nilfs_truncate_bmap(ii, 0); |
abdb318b | 789 | nilfs_mark_inode_dirty(inode); |
dbd5768f | 790 | clear_inode(inode); |
e912a5b6 | 791 | |
25b18d39 RK |
792 | ret = nilfs_ifile_delete_inode(ii->i_root->ifile, inode->i_ino); |
793 | if (!ret) | |
e5f7f848 | 794 | atomic64_dec(&ii->i_root->inodes_count); |
e912a5b6 | 795 | |
6fd1e5c9 | 796 | nilfs_clear_inode(inode); |
e912a5b6 | 797 | |
05fe58fd RK |
798 | if (IS_SYNC(inode)) |
799 | nilfs_set_transaction_flag(NILFS_TI_SYNC); | |
47420c79 | 800 | nilfs_transaction_commit(sb); |
076a378b RK |
801 | /* |
802 | * May construct a logical segment and may fail in sync mode. | |
803 | * But delete_inode has no return value. | |
804 | */ | |
05fe58fd RK |
805 | } |
806 | ||
807 | int nilfs_setattr(struct dentry *dentry, struct iattr *iattr) | |
808 | { | |
809 | struct nilfs_transaction_info ti; | |
2b0143b5 | 810 | struct inode *inode = d_inode(dentry); |
05fe58fd | 811 | struct super_block *sb = inode->i_sb; |
47420c79 | 812 | int err; |
05fe58fd | 813 | |
31051c85 | 814 | err = setattr_prepare(dentry, iattr); |
05fe58fd RK |
815 | if (err) |
816 | return err; | |
817 | ||
818 | err = nilfs_transaction_begin(sb, &ti, 0); | |
819 | if (unlikely(err)) | |
820 | return err; | |
1025774c CH |
821 | |
822 | if ((iattr->ia_valid & ATTR_SIZE) && | |
823 | iattr->ia_size != i_size_read(inode)) { | |
562c72aa | 824 | inode_dio_wait(inode); |
2d1b399b MS |
825 | truncate_setsize(inode, iattr->ia_size); |
826 | nilfs_truncate(inode); | |
1025774c CH |
827 | } |
828 | ||
829 | setattr_copy(inode, iattr); | |
830 | mark_inode_dirty(inode); | |
831 | ||
832 | if (iattr->ia_valid & ATTR_MODE) { | |
05fe58fd | 833 | err = nilfs_acl_chmod(inode); |
1025774c CH |
834 | if (unlikely(err)) |
835 | goto out_err; | |
836 | } | |
837 | ||
838 | return nilfs_transaction_commit(sb); | |
47420c79 | 839 | |
1025774c CH |
840 | out_err: |
841 | nilfs_transaction_abort(sb); | |
47420c79 | 842 | return err; |
05fe58fd RK |
843 | } |
844 | ||
10556cb2 | 845 | int nilfs_permission(struct inode *inode, int mask) |
dc3d3b81 | 846 | { |
730e908f | 847 | struct nilfs_root *root = NILFS_I(inode)->i_root; |
4ad364ca | 848 | |
dc3d3b81 RK |
849 | if ((mask & MAY_WRITE) && root && |
850 | root->cno != NILFS_CPTREE_CURRENT_CNO) | |
851 | return -EROFS; /* snapshot is not writable */ | |
852 | ||
2830ba7f | 853 | return generic_permission(inode, mask); |
dc3d3b81 RK |
854 | } |
855 | ||
bcbc8c64 | 856 | int nilfs_load_inode_block(struct inode *inode, struct buffer_head **pbh) |
05fe58fd | 857 | { |
e3154e97 | 858 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
05fe58fd RK |
859 | struct nilfs_inode_info *ii = NILFS_I(inode); |
860 | int err; | |
861 | ||
693dd321 | 862 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd | 863 | if (ii->i_bh == NULL) { |
693dd321 | 864 | spin_unlock(&nilfs->ns_inode_lock); |
e912a5b6 RK |
865 | err = nilfs_ifile_get_inode_block(ii->i_root->ifile, |
866 | inode->i_ino, pbh); | |
05fe58fd RK |
867 | if (unlikely(err)) |
868 | return err; | |
693dd321 | 869 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd RK |
870 | if (ii->i_bh == NULL) |
871 | ii->i_bh = *pbh; | |
872 | else { | |
873 | brelse(*pbh); | |
874 | *pbh = ii->i_bh; | |
875 | } | |
876 | } else | |
877 | *pbh = ii->i_bh; | |
878 | ||
879 | get_bh(*pbh); | |
693dd321 | 880 | spin_unlock(&nilfs->ns_inode_lock); |
05fe58fd RK |
881 | return 0; |
882 | } | |
883 | ||
884 | int nilfs_inode_dirty(struct inode *inode) | |
885 | { | |
886 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
e3154e97 | 887 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
05fe58fd RK |
888 | int ret = 0; |
889 | ||
890 | if (!list_empty(&ii->i_dirty)) { | |
693dd321 | 891 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd RK |
892 | ret = test_bit(NILFS_I_DIRTY, &ii->i_state) || |
893 | test_bit(NILFS_I_BUSY, &ii->i_state); | |
693dd321 | 894 | spin_unlock(&nilfs->ns_inode_lock); |
05fe58fd RK |
895 | } |
896 | return ret; | |
897 | } | |
898 | ||
0c6c44cb | 899 | int nilfs_set_file_dirty(struct inode *inode, unsigned int nr_dirty) |
05fe58fd RK |
900 | { |
901 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
e3154e97 | 902 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
05fe58fd | 903 | |
693dd321 | 904 | atomic_add(nr_dirty, &nilfs->ns_ndirtyblks); |
05fe58fd | 905 | |
458c5b08 | 906 | if (test_and_set_bit(NILFS_I_DIRTY, &ii->i_state)) |
05fe58fd RK |
907 | return 0; |
908 | ||
693dd321 | 909 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd RK |
910 | if (!test_bit(NILFS_I_QUEUED, &ii->i_state) && |
911 | !test_bit(NILFS_I_BUSY, &ii->i_state)) { | |
076a378b RK |
912 | /* |
913 | * Because this routine may race with nilfs_dispose_list(), | |
914 | * we have to check NILFS_I_QUEUED here, too. | |
915 | */ | |
05fe58fd | 916 | if (list_empty(&ii->i_dirty) && igrab(inode) == NULL) { |
076a378b RK |
917 | /* |
918 | * This will happen when somebody is freeing | |
919 | * this inode. | |
920 | */ | |
d6517deb RK |
921 | nilfs_msg(inode->i_sb, KERN_WARNING, |
922 | "cannot set file dirty (ino=%lu): the file is being freed", | |
923 | inode->i_ino); | |
693dd321 | 924 | spin_unlock(&nilfs->ns_inode_lock); |
076a378b RK |
925 | return -EINVAL; /* |
926 | * NILFS_I_DIRTY may remain for | |
927 | * freeing inode. | |
928 | */ | |
05fe58fd | 929 | } |
eaae0f37 | 930 | list_move_tail(&ii->i_dirty, &nilfs->ns_dirty_files); |
05fe58fd RK |
931 | set_bit(NILFS_I_QUEUED, &ii->i_state); |
932 | } | |
693dd321 | 933 | spin_unlock(&nilfs->ns_inode_lock); |
05fe58fd RK |
934 | return 0; |
935 | } | |
936 | ||
b9f66140 | 937 | int __nilfs_mark_inode_dirty(struct inode *inode, int flags) |
05fe58fd | 938 | { |
05fe58fd RK |
939 | struct buffer_head *ibh; |
940 | int err; | |
941 | ||
bcbc8c64 | 942 | err = nilfs_load_inode_block(inode, &ibh); |
05fe58fd | 943 | if (unlikely(err)) { |
d6517deb RK |
944 | nilfs_msg(inode->i_sb, KERN_WARNING, |
945 | "cannot mark inode dirty (ino=%lu): error %d loading inode block", | |
946 | inode->i_ino, err); | |
05fe58fd RK |
947 | return err; |
948 | } | |
b9f66140 | 949 | nilfs_update_inode(inode, ibh, flags); |
5fc7b141 | 950 | mark_buffer_dirty(ibh); |
e912a5b6 | 951 | nilfs_mdt_mark_dirty(NILFS_I(inode)->i_root->ifile); |
05fe58fd RK |
952 | brelse(ibh); |
953 | return 0; | |
954 | } | |
955 | ||
956 | /** | |
957 | * nilfs_dirty_inode - reflect changes on given inode to an inode block. | |
958 | * @inode: inode of the file to be registered. | |
959 | * | |
960 | * nilfs_dirty_inode() loads a inode block containing the specified | |
961 | * @inode and copies data from a nilfs_inode to a corresponding inode | |
962 | * entry in the inode block. This operation is excluded from the segment | |
963 | * construction. This function can be called both as a single operation | |
964 | * and as a part of indivisible file operations. | |
965 | */ | |
aa385729 | 966 | void nilfs_dirty_inode(struct inode *inode, int flags) |
05fe58fd RK |
967 | { |
968 | struct nilfs_transaction_info ti; | |
7d6cd92f | 969 | struct nilfs_mdt_info *mdi = NILFS_MDT(inode); |
05fe58fd RK |
970 | |
971 | if (is_bad_inode(inode)) { | |
d6517deb RK |
972 | nilfs_msg(inode->i_sb, KERN_WARNING, |
973 | "tried to mark bad_inode dirty. ignored."); | |
05fe58fd RK |
974 | dump_stack(); |
975 | return; | |
976 | } | |
7d6cd92f RK |
977 | if (mdi) { |
978 | nilfs_mdt_mark_dirty(inode); | |
979 | return; | |
980 | } | |
05fe58fd | 981 | nilfs_transaction_begin(inode->i_sb, &ti, 0); |
b9f66140 | 982 | __nilfs_mark_inode_dirty(inode, flags); |
47420c79 | 983 | nilfs_transaction_commit(inode->i_sb); /* never fails */ |
05fe58fd | 984 | } |
622daaff RK |
985 | |
986 | int nilfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, | |
987 | __u64 start, __u64 len) | |
988 | { | |
0ef28f9a | 989 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
622daaff RK |
990 | __u64 logical = 0, phys = 0, size = 0; |
991 | __u32 flags = 0; | |
992 | loff_t isize; | |
993 | sector_t blkoff, end_blkoff; | |
994 | sector_t delalloc_blkoff; | |
995 | unsigned long delalloc_blklen; | |
996 | unsigned int blkbits = inode->i_blkbits; | |
997 | int ret, n; | |
998 | ||
999 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
1000 | if (ret) | |
1001 | return ret; | |
1002 | ||
5955102c | 1003 | inode_lock(inode); |
622daaff RK |
1004 | |
1005 | isize = i_size_read(inode); | |
1006 | ||
1007 | blkoff = start >> blkbits; | |
1008 | end_blkoff = (start + len - 1) >> blkbits; | |
1009 | ||
1010 | delalloc_blklen = nilfs_find_uncommitted_extent(inode, blkoff, | |
1011 | &delalloc_blkoff); | |
1012 | ||
1013 | do { | |
1014 | __u64 blkphy; | |
1015 | unsigned int maxblocks; | |
1016 | ||
1017 | if (delalloc_blklen && blkoff == delalloc_blkoff) { | |
1018 | if (size) { | |
1019 | /* End of the current extent */ | |
1020 | ret = fiemap_fill_next_extent( | |
1021 | fieinfo, logical, phys, size, flags); | |
1022 | if (ret) | |
1023 | break; | |
1024 | } | |
1025 | if (blkoff > end_blkoff) | |
1026 | break; | |
1027 | ||
1028 | flags = FIEMAP_EXTENT_MERGED | FIEMAP_EXTENT_DELALLOC; | |
1029 | logical = blkoff << blkbits; | |
1030 | phys = 0; | |
1031 | size = delalloc_blklen << blkbits; | |
1032 | ||
1033 | blkoff = delalloc_blkoff + delalloc_blklen; | |
1034 | delalloc_blklen = nilfs_find_uncommitted_extent( | |
1035 | inode, blkoff, &delalloc_blkoff); | |
1036 | continue; | |
1037 | } | |
1038 | ||
1039 | /* | |
1040 | * Limit the number of blocks that we look up so as | |
1041 | * not to get into the next delayed allocation extent. | |
1042 | */ | |
1043 | maxblocks = INT_MAX; | |
1044 | if (delalloc_blklen) | |
1045 | maxblocks = min_t(sector_t, delalloc_blkoff - blkoff, | |
1046 | maxblocks); | |
1047 | blkphy = 0; | |
1048 | ||
1049 | down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); | |
1050 | n = nilfs_bmap_lookup_contig( | |
1051 | NILFS_I(inode)->i_bmap, blkoff, &blkphy, maxblocks); | |
1052 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); | |
1053 | ||
1054 | if (n < 0) { | |
1055 | int past_eof; | |
1056 | ||
1057 | if (unlikely(n != -ENOENT)) | |
1058 | break; /* error */ | |
1059 | ||
1060 | /* HOLE */ | |
1061 | blkoff++; | |
1062 | past_eof = ((blkoff << blkbits) >= isize); | |
1063 | ||
1064 | if (size) { | |
1065 | /* End of the current extent */ | |
1066 | ||
1067 | if (past_eof) | |
1068 | flags |= FIEMAP_EXTENT_LAST; | |
1069 | ||
1070 | ret = fiemap_fill_next_extent( | |
1071 | fieinfo, logical, phys, size, flags); | |
1072 | if (ret) | |
1073 | break; | |
1074 | size = 0; | |
1075 | } | |
1076 | if (blkoff > end_blkoff || past_eof) | |
1077 | break; | |
1078 | } else { | |
1079 | if (size) { | |
1080 | if (phys && blkphy << blkbits == phys + size) { | |
1081 | /* The current extent goes on */ | |
1082 | size += n << blkbits; | |
1083 | } else { | |
1084 | /* Terminate the current extent */ | |
1085 | ret = fiemap_fill_next_extent( | |
1086 | fieinfo, logical, phys, size, | |
1087 | flags); | |
1088 | if (ret || blkoff > end_blkoff) | |
1089 | break; | |
1090 | ||
1091 | /* Start another extent */ | |
1092 | flags = FIEMAP_EXTENT_MERGED; | |
1093 | logical = blkoff << blkbits; | |
1094 | phys = blkphy << blkbits; | |
1095 | size = n << blkbits; | |
1096 | } | |
1097 | } else { | |
1098 | /* Start a new extent */ | |
1099 | flags = FIEMAP_EXTENT_MERGED; | |
1100 | logical = blkoff << blkbits; | |
1101 | phys = blkphy << blkbits; | |
1102 | size = n << blkbits; | |
1103 | } | |
1104 | blkoff += n; | |
1105 | } | |
1106 | cond_resched(); | |
1107 | } while (true); | |
1108 | ||
1109 | /* If ret is 1 then we just hit the end of the extent array */ | |
1110 | if (ret == 1) | |
1111 | ret = 0; | |
1112 | ||
5955102c | 1113 | inode_unlock(inode); |
622daaff RK |
1114 | return ret; |
1115 | } |