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 | * | |
4b420ab4 | 16 | * Written by Ryusuke Konishi. |
05fe58fd RK |
17 | * |
18 | */ | |
19 | ||
20 | #include <linux/buffer_head.h> | |
5a0e3ad6 | 21 | #include <linux/gfp.h> |
05fe58fd | 22 | #include <linux/mpage.h> |
56d7acc7 | 23 | #include <linux/pagemap.h> |
05fe58fd | 24 | #include <linux/writeback.h> |
e2e40f2c | 25 | #include <linux/uio.h> |
05fe58fd | 26 | #include "nilfs.h" |
6fd1e5c9 | 27 | #include "btnode.h" |
05fe58fd RK |
28 | #include "segment.h" |
29 | #include "page.h" | |
30 | #include "mdt.h" | |
31 | #include "cpfile.h" | |
32 | #include "ifile.h" | |
33 | ||
f5974c8f VD |
34 | /** |
35 | * struct nilfs_iget_args - arguments used during comparison between inodes | |
36 | * @ino: inode number | |
37 | * @cno: checkpoint number | |
38 | * @root: pointer on NILFS root object (mounted checkpoint) | |
39 | * @for_gc: inode for GC flag | |
40 | */ | |
0e14a359 RK |
41 | struct nilfs_iget_args { |
42 | u64 ino; | |
43 | __u64 cno; | |
4d8d9293 | 44 | struct nilfs_root *root; |
0e14a359 RK |
45 | int for_gc; |
46 | }; | |
05fe58fd | 47 | |
705304a8 RK |
48 | static int nilfs_iget_test(struct inode *inode, void *opaque); |
49 | ||
be667377 RK |
50 | void nilfs_inode_add_blocks(struct inode *inode, int n) |
51 | { | |
52 | struct nilfs_root *root = NILFS_I(inode)->i_root; | |
53 | ||
54 | inode_add_bytes(inode, (1 << inode->i_blkbits) * n); | |
55 | if (root) | |
e5f7f848 | 56 | atomic64_add(n, &root->blocks_count); |
be667377 RK |
57 | } |
58 | ||
59 | void nilfs_inode_sub_blocks(struct inode *inode, int n) | |
60 | { | |
61 | struct nilfs_root *root = NILFS_I(inode)->i_root; | |
62 | ||
63 | inode_sub_bytes(inode, (1 << inode->i_blkbits) * n); | |
64 | if (root) | |
e5f7f848 | 65 | atomic64_sub(n, &root->blocks_count); |
be667377 RK |
66 | } |
67 | ||
05fe58fd RK |
68 | /** |
69 | * nilfs_get_block() - get a file block on the filesystem (callback function) | |
70 | * @inode - inode struct of the target file | |
71 | * @blkoff - file block number | |
72 | * @bh_result - buffer head to be mapped on | |
73 | * @create - indicate whether allocating the block or not when it has not | |
74 | * been allocated yet. | |
75 | * | |
76 | * This function does not issue actual read request of the specified data | |
77 | * block. It is done by VFS. | |
05fe58fd RK |
78 | */ |
79 | int nilfs_get_block(struct inode *inode, sector_t blkoff, | |
80 | struct buffer_head *bh_result, int create) | |
81 | { | |
82 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
0ef28f9a | 83 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
c3a7abf0 | 84 | __u64 blknum = 0; |
05fe58fd | 85 | int err = 0, ret; |
c3a7abf0 | 86 | unsigned maxblocks = bh_result->b_size >> inode->i_blkbits; |
05fe58fd | 87 | |
0ef28f9a | 88 | down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
c3a7abf0 | 89 | ret = nilfs_bmap_lookup_contig(ii->i_bmap, blkoff, &blknum, maxblocks); |
0ef28f9a | 90 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
c3a7abf0 | 91 | if (ret >= 0) { /* found */ |
05fe58fd | 92 | map_bh(bh_result, inode->i_sb, blknum); |
c3a7abf0 RK |
93 | if (ret > 0) |
94 | bh_result->b_size = (ret << inode->i_blkbits); | |
05fe58fd RK |
95 | goto out; |
96 | } | |
05fe58fd RK |
97 | /* data block was not found */ |
98 | if (ret == -ENOENT && create) { | |
99 | struct nilfs_transaction_info ti; | |
100 | ||
101 | bh_result->b_blocknr = 0; | |
102 | err = nilfs_transaction_begin(inode->i_sb, &ti, 1); | |
103 | if (unlikely(err)) | |
104 | goto out; | |
3568a13f | 105 | err = nilfs_bmap_insert(ii->i_bmap, blkoff, |
05fe58fd | 106 | (unsigned long)bh_result); |
05fe58fd RK |
107 | if (unlikely(err != 0)) { |
108 | if (err == -EEXIST) { | |
109 | /* | |
110 | * The get_block() function could be called | |
111 | * from multiple callers for an inode. | |
112 | * However, the page having this block must | |
113 | * be locked in this case. | |
114 | */ | |
1f5abe7e | 115 | printk(KERN_WARNING |
05fe58fd RK |
116 | "nilfs_get_block: a race condition " |
117 | "while inserting a data block. " | |
118 | "(inode number=%lu, file block " | |
119 | "offset=%llu)\n", | |
120 | inode->i_ino, | |
121 | (unsigned long long)blkoff); | |
1f5abe7e | 122 | err = 0; |
05fe58fd | 123 | } |
47420c79 | 124 | nilfs_transaction_abort(inode->i_sb); |
05fe58fd RK |
125 | goto out; |
126 | } | |
b9f66140 | 127 | nilfs_mark_inode_dirty_sync(inode); |
47420c79 | 128 | nilfs_transaction_commit(inode->i_sb); /* never fails */ |
05fe58fd RK |
129 | /* Error handling should be detailed */ |
130 | set_buffer_new(bh_result); | |
27e6c7a3 | 131 | set_buffer_delay(bh_result); |
05fe58fd RK |
132 | map_bh(bh_result, inode->i_sb, 0); /* dbn must be changed |
133 | to proper value */ | |
134 | } else if (ret == -ENOENT) { | |
135 | /* not found is not error (e.g. hole); must return without | |
136 | the mapped state flag. */ | |
137 | ; | |
138 | } else { | |
139 | err = ret; | |
140 | } | |
141 | ||
142 | out: | |
143 | return err; | |
144 | } | |
145 | ||
146 | /** | |
147 | * nilfs_readpage() - implement readpage() method of nilfs_aops {} | |
148 | * address_space_operations. | |
149 | * @file - file struct of the file to be read | |
150 | * @page - the page to be read | |
151 | */ | |
152 | static int nilfs_readpage(struct file *file, struct page *page) | |
153 | { | |
154 | return mpage_readpage(page, nilfs_get_block); | |
155 | } | |
156 | ||
157 | /** | |
158 | * nilfs_readpages() - implement readpages() method of nilfs_aops {} | |
159 | * address_space_operations. | |
160 | * @file - file struct of the file to be read | |
161 | * @mapping - address_space struct used for reading multiple pages | |
162 | * @pages - the pages to be read | |
163 | * @nr_pages - number of pages to be read | |
164 | */ | |
165 | static int nilfs_readpages(struct file *file, struct address_space *mapping, | |
166 | struct list_head *pages, unsigned nr_pages) | |
167 | { | |
168 | return mpage_readpages(mapping, pages, nr_pages, nilfs_get_block); | |
169 | } | |
170 | ||
171 | static int nilfs_writepages(struct address_space *mapping, | |
172 | struct writeback_control *wbc) | |
173 | { | |
f30bf3e4 RK |
174 | struct inode *inode = mapping->host; |
175 | int err = 0; | |
176 | ||
8c26c4e2 VD |
177 | if (inode->i_sb->s_flags & MS_RDONLY) { |
178 | nilfs_clear_dirty_pages(mapping, false); | |
179 | return -EROFS; | |
180 | } | |
181 | ||
f30bf3e4 RK |
182 | if (wbc->sync_mode == WB_SYNC_ALL) |
183 | err = nilfs_construct_dsync_segment(inode->i_sb, inode, | |
184 | wbc->range_start, | |
185 | wbc->range_end); | |
186 | return err; | |
05fe58fd RK |
187 | } |
188 | ||
189 | static int nilfs_writepage(struct page *page, struct writeback_control *wbc) | |
190 | { | |
191 | struct inode *inode = page->mapping->host; | |
192 | int err; | |
193 | ||
eb53b6db | 194 | if (inode->i_sb->s_flags & MS_RDONLY) { |
8c26c4e2 VD |
195 | /* |
196 | * It means that filesystem was remounted in read-only | |
197 | * mode because of error or metadata corruption. But we | |
198 | * have dirty pages that try to be flushed in background. | |
199 | * So, here we simply discard this dirty page. | |
200 | */ | |
201 | nilfs_clear_dirty_page(page, false); | |
202 | unlock_page(page); | |
203 | return -EROFS; | |
204 | } | |
205 | ||
05fe58fd RK |
206 | redirty_page_for_writepage(wbc, page); |
207 | unlock_page(page); | |
208 | ||
209 | if (wbc->sync_mode == WB_SYNC_ALL) { | |
210 | err = nilfs_construct_segment(inode->i_sb); | |
211 | if (unlikely(err)) | |
212 | return err; | |
213 | } else if (wbc->for_reclaim) | |
214 | nilfs_flush_segment(inode->i_sb, inode->i_ino); | |
215 | ||
216 | return 0; | |
217 | } | |
218 | ||
219 | static int nilfs_set_page_dirty(struct page *page) | |
220 | { | |
56d7acc7 | 221 | struct inode *inode = page->mapping->host; |
136e8770 | 222 | int ret = __set_page_dirty_nobuffers(page); |
05fe58fd | 223 | |
136e8770 | 224 | if (page_has_buffers(page)) { |
136e8770 RK |
225 | unsigned nr_dirty = 0; |
226 | struct buffer_head *bh, *head; | |
05fe58fd | 227 | |
136e8770 RK |
228 | /* |
229 | * This page is locked by callers, and no other thread | |
230 | * concurrently marks its buffers dirty since they are | |
231 | * only dirtied through routines in fs/buffer.c in | |
232 | * which call sites of mark_buffer_dirty are protected | |
233 | * by page lock. | |
234 | */ | |
235 | bh = head = page_buffers(page); | |
236 | do { | |
237 | /* Do not mark hole blocks dirty */ | |
238 | if (buffer_dirty(bh) || !buffer_mapped(bh)) | |
239 | continue; | |
240 | ||
241 | set_buffer_dirty(bh); | |
242 | nr_dirty++; | |
243 | } while (bh = bh->b_this_page, bh != head); | |
244 | ||
245 | if (nr_dirty) | |
246 | nilfs_set_file_dirty(inode, nr_dirty); | |
56d7acc7 | 247 | } else if (ret) { |
09cbfeaf | 248 | unsigned nr_dirty = 1 << (PAGE_SHIFT - inode->i_blkbits); |
56d7acc7 AR |
249 | |
250 | nilfs_set_file_dirty(inode, nr_dirty); | |
05fe58fd RK |
251 | } |
252 | return ret; | |
253 | } | |
254 | ||
2d1b399b MS |
255 | void nilfs_write_failed(struct address_space *mapping, loff_t to) |
256 | { | |
257 | struct inode *inode = mapping->host; | |
258 | ||
259 | if (to > inode->i_size) { | |
7caef267 | 260 | truncate_pagecache(inode, inode->i_size); |
2d1b399b MS |
261 | nilfs_truncate(inode); |
262 | } | |
263 | } | |
264 | ||
05fe58fd RK |
265 | static int nilfs_write_begin(struct file *file, struct address_space *mapping, |
266 | loff_t pos, unsigned len, unsigned flags, | |
267 | struct page **pagep, void **fsdata) | |
268 | ||
269 | { | |
270 | struct inode *inode = mapping->host; | |
271 | int err = nilfs_transaction_begin(inode->i_sb, NULL, 1); | |
272 | ||
273 | if (unlikely(err)) | |
274 | return err; | |
275 | ||
155130a4 CH |
276 | err = block_write_begin(mapping, pos, len, flags, pagep, |
277 | nilfs_get_block); | |
278 | if (unlikely(err)) { | |
2d1b399b | 279 | nilfs_write_failed(mapping, pos + len); |
47420c79 | 280 | nilfs_transaction_abort(inode->i_sb); |
155130a4 | 281 | } |
05fe58fd RK |
282 | return err; |
283 | } | |
284 | ||
285 | static int nilfs_write_end(struct file *file, struct address_space *mapping, | |
286 | loff_t pos, unsigned len, unsigned copied, | |
287 | struct page *page, void *fsdata) | |
288 | { | |
289 | struct inode *inode = mapping->host; | |
09cbfeaf | 290 | unsigned start = pos & (PAGE_SIZE - 1); |
05fe58fd RK |
291 | unsigned nr_dirty; |
292 | int err; | |
293 | ||
294 | nr_dirty = nilfs_page_count_clean_buffers(page, start, | |
295 | start + copied); | |
296 | copied = generic_write_end(file, mapping, pos, len, copied, page, | |
297 | fsdata); | |
bcbc8c64 | 298 | nilfs_set_file_dirty(inode, nr_dirty); |
47420c79 | 299 | err = nilfs_transaction_commit(inode->i_sb); |
05fe58fd RK |
300 | return err ? : copied; |
301 | } | |
302 | ||
303 | static ssize_t | |
c8b8e32d | 304 | nilfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
05fe58fd | 305 | { |
6b6dabc8 | 306 | struct inode *inode = file_inode(iocb->ki_filp); |
05fe58fd | 307 | |
6f673763 | 308 | if (iov_iter_rw(iter) == WRITE) |
05fe58fd RK |
309 | return 0; |
310 | ||
311 | /* Needs synchronization with the cleaner */ | |
c8b8e32d | 312 | return blockdev_direct_IO(iocb, inode, iter, nilfs_get_block); |
05fe58fd RK |
313 | } |
314 | ||
7f09410b | 315 | const struct address_space_operations nilfs_aops = { |
05fe58fd RK |
316 | .writepage = nilfs_writepage, |
317 | .readpage = nilfs_readpage, | |
05fe58fd RK |
318 | .writepages = nilfs_writepages, |
319 | .set_page_dirty = nilfs_set_page_dirty, | |
320 | .readpages = nilfs_readpages, | |
321 | .write_begin = nilfs_write_begin, | |
322 | .write_end = nilfs_write_end, | |
323 | /* .releasepage = nilfs_releasepage, */ | |
324 | .invalidatepage = block_invalidatepage, | |
325 | .direct_IO = nilfs_direct_IO, | |
258ef67e | 326 | .is_partially_uptodate = block_is_partially_uptodate, |
05fe58fd RK |
327 | }; |
328 | ||
705304a8 RK |
329 | static int nilfs_insert_inode_locked(struct inode *inode, |
330 | struct nilfs_root *root, | |
331 | unsigned long ino) | |
332 | { | |
333 | struct nilfs_iget_args args = { | |
334 | .ino = ino, .root = root, .cno = 0, .for_gc = 0 | |
335 | }; | |
336 | ||
337 | return insert_inode_locked4(inode, ino, nilfs_iget_test, &args); | |
338 | } | |
339 | ||
c6e49e3f | 340 | struct inode *nilfs_new_inode(struct inode *dir, umode_t mode) |
05fe58fd RK |
341 | { |
342 | struct super_block *sb = dir->i_sb; | |
e3154e97 | 343 | struct the_nilfs *nilfs = sb->s_fs_info; |
05fe58fd RK |
344 | struct inode *inode; |
345 | struct nilfs_inode_info *ii; | |
4d8d9293 | 346 | struct nilfs_root *root; |
05fe58fd RK |
347 | int err = -ENOMEM; |
348 | ino_t ino; | |
349 | ||
350 | inode = new_inode(sb); | |
351 | if (unlikely(!inode)) | |
352 | goto failed; | |
353 | ||
354 | mapping_set_gfp_mask(inode->i_mapping, | |
c62d2555 | 355 | mapping_gfp_constraint(inode->i_mapping, ~__GFP_FS)); |
05fe58fd | 356 | |
4d8d9293 | 357 | root = NILFS_I(dir)->i_root; |
05fe58fd RK |
358 | ii = NILFS_I(inode); |
359 | ii->i_state = 1 << NILFS_I_NEW; | |
4d8d9293 | 360 | ii->i_root = root; |
05fe58fd | 361 | |
e912a5b6 | 362 | err = nilfs_ifile_create_inode(root->ifile, &ino, &ii->i_bh); |
05fe58fd RK |
363 | if (unlikely(err)) |
364 | goto failed_ifile_create_inode; | |
365 | /* reference count of i_bh inherits from nilfs_mdt_read_block() */ | |
366 | ||
e5f7f848 | 367 | atomic64_inc(&root->inodes_count); |
73459dcc | 368 | inode_init_owner(inode, dir, mode); |
05fe58fd RK |
369 | inode->i_ino = ino; |
370 | inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; | |
371 | ||
372 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) { | |
373 | err = nilfs_bmap_read(ii->i_bmap, NULL); | |
374 | if (err < 0) | |
705304a8 | 375 | goto failed_after_creation; |
05fe58fd RK |
376 | |
377 | set_bit(NILFS_I_BMAP, &ii->i_state); | |
378 | /* No lock is needed; iget() ensures it. */ | |
379 | } | |
380 | ||
b253a3e4 RK |
381 | ii->i_flags = nilfs_mask_flags( |
382 | mode, NILFS_I(dir)->i_flags & NILFS_FL_INHERITED); | |
05fe58fd RK |
383 | |
384 | /* ii->i_file_acl = 0; */ | |
385 | /* ii->i_dir_acl = 0; */ | |
05fe58fd | 386 | ii->i_dir_start_lookup = 0; |
05fe58fd | 387 | nilfs_set_inode_flags(inode); |
9b1fc4e4 RK |
388 | spin_lock(&nilfs->ns_next_gen_lock); |
389 | inode->i_generation = nilfs->ns_next_generation++; | |
390 | spin_unlock(&nilfs->ns_next_gen_lock); | |
705304a8 RK |
391 | if (nilfs_insert_inode_locked(inode, root, ino) < 0) { |
392 | err = -EIO; | |
393 | goto failed_after_creation; | |
394 | } | |
05fe58fd RK |
395 | |
396 | err = nilfs_init_acl(inode, dir); | |
397 | if (unlikely(err)) | |
705304a8 | 398 | goto failed_after_creation; /* never occur. When supporting |
05fe58fd RK |
399 | nilfs_init_acl(), proper cancellation of |
400 | above jobs should be considered */ | |
401 | ||
05fe58fd RK |
402 | return inode; |
403 | ||
705304a8 | 404 | failed_after_creation: |
6d6b77f1 | 405 | clear_nlink(inode); |
705304a8 | 406 | unlock_new_inode(inode); |
05fe58fd | 407 | iput(inode); /* raw_inode will be deleted through |
705304a8 | 408 | nilfs_evict_inode() */ |
05fe58fd RK |
409 | goto failed; |
410 | ||
411 | failed_ifile_create_inode: | |
412 | make_bad_inode(inode); | |
413 | iput(inode); /* if i_nlink == 1, generic_forget_inode() will be | |
414 | called */ | |
415 | failed: | |
416 | return ERR_PTR(err); | |
417 | } | |
418 | ||
05fe58fd RK |
419 | void nilfs_set_inode_flags(struct inode *inode) |
420 | { | |
421 | unsigned int flags = NILFS_I(inode)->i_flags; | |
faea2c53 | 422 | unsigned int new_fl = 0; |
05fe58fd | 423 | |
f0c9f242 | 424 | if (flags & FS_SYNC_FL) |
faea2c53 | 425 | new_fl |= S_SYNC; |
f0c9f242 | 426 | if (flags & FS_APPEND_FL) |
faea2c53 | 427 | new_fl |= S_APPEND; |
f0c9f242 | 428 | if (flags & FS_IMMUTABLE_FL) |
faea2c53 | 429 | new_fl |= S_IMMUTABLE; |
f0c9f242 | 430 | if (flags & FS_NOATIME_FL) |
faea2c53 | 431 | new_fl |= S_NOATIME; |
f0c9f242 | 432 | if (flags & FS_DIRSYNC_FL) |
faea2c53 RK |
433 | new_fl |= S_DIRSYNC; |
434 | inode_set_flags(inode, new_fl, S_SYNC | S_APPEND | S_IMMUTABLE | | |
435 | S_NOATIME | S_DIRSYNC); | |
05fe58fd RK |
436 | } |
437 | ||
438 | int nilfs_read_inode_common(struct inode *inode, | |
439 | struct nilfs_inode *raw_inode) | |
440 | { | |
441 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
442 | int err; | |
443 | ||
444 | inode->i_mode = le16_to_cpu(raw_inode->i_mode); | |
305d3d0d EB |
445 | i_uid_write(inode, le32_to_cpu(raw_inode->i_uid)); |
446 | i_gid_write(inode, le32_to_cpu(raw_inode->i_gid)); | |
bfe86848 | 447 | set_nlink(inode, le16_to_cpu(raw_inode->i_links_count)); |
05fe58fd RK |
448 | inode->i_size = le64_to_cpu(raw_inode->i_size); |
449 | inode->i_atime.tv_sec = le64_to_cpu(raw_inode->i_mtime); | |
450 | inode->i_ctime.tv_sec = le64_to_cpu(raw_inode->i_ctime); | |
451 | inode->i_mtime.tv_sec = le64_to_cpu(raw_inode->i_mtime); | |
61239230 RK |
452 | inode->i_atime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec); |
453 | inode->i_ctime.tv_nsec = le32_to_cpu(raw_inode->i_ctime_nsec); | |
454 | inode->i_mtime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec); | |
705304a8 RK |
455 | if (inode->i_nlink == 0) |
456 | return -ESTALE; /* this inode is deleted */ | |
05fe58fd RK |
457 | |
458 | inode->i_blocks = le64_to_cpu(raw_inode->i_blocks); | |
459 | ii->i_flags = le32_to_cpu(raw_inode->i_flags); | |
460 | #if 0 | |
461 | ii->i_file_acl = le32_to_cpu(raw_inode->i_file_acl); | |
462 | ii->i_dir_acl = S_ISREG(inode->i_mode) ? | |
463 | 0 : le32_to_cpu(raw_inode->i_dir_acl); | |
464 | #endif | |
3cc811bf | 465 | ii->i_dir_start_lookup = 0; |
05fe58fd RK |
466 | inode->i_generation = le32_to_cpu(raw_inode->i_generation); |
467 | ||
468 | if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
469 | S_ISLNK(inode->i_mode)) { | |
470 | err = nilfs_bmap_read(ii->i_bmap, raw_inode); | |
471 | if (err < 0) | |
472 | return err; | |
473 | set_bit(NILFS_I_BMAP, &ii->i_state); | |
474 | /* No lock is needed; iget() ensures it. */ | |
475 | } | |
476 | return 0; | |
477 | } | |
478 | ||
e912a5b6 RK |
479 | static int __nilfs_read_inode(struct super_block *sb, |
480 | struct nilfs_root *root, unsigned long ino, | |
05fe58fd RK |
481 | struct inode *inode) |
482 | { | |
e3154e97 | 483 | struct the_nilfs *nilfs = sb->s_fs_info; |
05fe58fd RK |
484 | struct buffer_head *bh; |
485 | struct nilfs_inode *raw_inode; | |
486 | int err; | |
487 | ||
365e215c | 488 | down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
e912a5b6 | 489 | err = nilfs_ifile_get_inode_block(root->ifile, ino, &bh); |
05fe58fd RK |
490 | if (unlikely(err)) |
491 | goto bad_inode; | |
492 | ||
e912a5b6 | 493 | raw_inode = nilfs_ifile_map_inode(root->ifile, ino, bh); |
05fe58fd | 494 | |
1b2f5a64 RK |
495 | err = nilfs_read_inode_common(inode, raw_inode); |
496 | if (err) | |
05fe58fd RK |
497 | goto failed_unmap; |
498 | ||
499 | if (S_ISREG(inode->i_mode)) { | |
500 | inode->i_op = &nilfs_file_inode_operations; | |
501 | inode->i_fop = &nilfs_file_operations; | |
502 | inode->i_mapping->a_ops = &nilfs_aops; | |
05fe58fd RK |
503 | } else if (S_ISDIR(inode->i_mode)) { |
504 | inode->i_op = &nilfs_dir_inode_operations; | |
505 | inode->i_fop = &nilfs_dir_operations; | |
506 | inode->i_mapping->a_ops = &nilfs_aops; | |
507 | } else if (S_ISLNK(inode->i_mode)) { | |
508 | inode->i_op = &nilfs_symlink_inode_operations; | |
21fc61c7 | 509 | inode_nohighmem(inode); |
05fe58fd RK |
510 | inode->i_mapping->a_ops = &nilfs_aops; |
511 | } else { | |
512 | inode->i_op = &nilfs_special_inode_operations; | |
513 | init_special_inode( | |
514 | inode, inode->i_mode, | |
cdce214e | 515 | huge_decode_dev(le64_to_cpu(raw_inode->i_device_code))); |
05fe58fd | 516 | } |
e912a5b6 | 517 | nilfs_ifile_unmap_inode(root->ifile, ino, bh); |
05fe58fd | 518 | brelse(bh); |
365e215c | 519 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
05fe58fd | 520 | nilfs_set_inode_flags(inode); |
0ce187c4 | 521 | mapping_set_gfp_mask(inode->i_mapping, |
c62d2555 | 522 | mapping_gfp_constraint(inode->i_mapping, ~__GFP_FS)); |
05fe58fd RK |
523 | return 0; |
524 | ||
525 | failed_unmap: | |
e912a5b6 | 526 | nilfs_ifile_unmap_inode(root->ifile, ino, bh); |
05fe58fd RK |
527 | brelse(bh); |
528 | ||
529 | bad_inode: | |
365e215c | 530 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
05fe58fd RK |
531 | return err; |
532 | } | |
533 | ||
0e14a359 RK |
534 | static int nilfs_iget_test(struct inode *inode, void *opaque) |
535 | { | |
536 | struct nilfs_iget_args *args = opaque; | |
537 | struct nilfs_inode_info *ii; | |
538 | ||
4d8d9293 | 539 | if (args->ino != inode->i_ino || args->root != NILFS_I(inode)->i_root) |
0e14a359 RK |
540 | return 0; |
541 | ||
542 | ii = NILFS_I(inode); | |
543 | if (!test_bit(NILFS_I_GCINODE, &ii->i_state)) | |
544 | return !args->for_gc; | |
545 | ||
546 | return args->for_gc && args->cno == ii->i_cno; | |
547 | } | |
548 | ||
549 | static int nilfs_iget_set(struct inode *inode, void *opaque) | |
550 | { | |
551 | struct nilfs_iget_args *args = opaque; | |
552 | ||
553 | inode->i_ino = args->ino; | |
554 | if (args->for_gc) { | |
555 | NILFS_I(inode)->i_state = 1 << NILFS_I_GCINODE; | |
556 | NILFS_I(inode)->i_cno = args->cno; | |
4d8d9293 RK |
557 | NILFS_I(inode)->i_root = NULL; |
558 | } else { | |
559 | if (args->root && args->ino == NILFS_ROOT_INO) | |
560 | nilfs_get_root(args->root); | |
561 | NILFS_I(inode)->i_root = args->root; | |
0e14a359 RK |
562 | } |
563 | return 0; | |
564 | } | |
565 | ||
032dbb3b RK |
566 | struct inode *nilfs_ilookup(struct super_block *sb, struct nilfs_root *root, |
567 | unsigned long ino) | |
568 | { | |
569 | struct nilfs_iget_args args = { | |
570 | .ino = ino, .root = root, .cno = 0, .for_gc = 0 | |
571 | }; | |
572 | ||
573 | return ilookup5(sb, ino, nilfs_iget_test, &args); | |
574 | } | |
575 | ||
f1e89c86 RK |
576 | struct inode *nilfs_iget_locked(struct super_block *sb, struct nilfs_root *root, |
577 | unsigned long ino) | |
05fe58fd | 578 | { |
4d8d9293 RK |
579 | struct nilfs_iget_args args = { |
580 | .ino = ino, .root = root, .cno = 0, .for_gc = 0 | |
581 | }; | |
f1e89c86 RK |
582 | |
583 | return iget5_locked(sb, ino, nilfs_iget_test, nilfs_iget_set, &args); | |
584 | } | |
585 | ||
586 | struct inode *nilfs_iget(struct super_block *sb, struct nilfs_root *root, | |
587 | unsigned long ino) | |
588 | { | |
05fe58fd RK |
589 | struct inode *inode; |
590 | int err; | |
591 | ||
f1e89c86 | 592 | inode = nilfs_iget_locked(sb, root, ino); |
05fe58fd RK |
593 | if (unlikely(!inode)) |
594 | return ERR_PTR(-ENOMEM); | |
595 | if (!(inode->i_state & I_NEW)) | |
596 | return inode; | |
597 | ||
e912a5b6 | 598 | err = __nilfs_read_inode(sb, root, ino, inode); |
05fe58fd RK |
599 | if (unlikely(err)) { |
600 | iget_failed(inode); | |
601 | return ERR_PTR(err); | |
602 | } | |
603 | unlock_new_inode(inode); | |
604 | return inode; | |
605 | } | |
606 | ||
263d90ce RK |
607 | struct inode *nilfs_iget_for_gc(struct super_block *sb, unsigned long ino, |
608 | __u64 cno) | |
609 | { | |
4d8d9293 RK |
610 | struct nilfs_iget_args args = { |
611 | .ino = ino, .root = NULL, .cno = cno, .for_gc = 1 | |
612 | }; | |
263d90ce RK |
613 | struct inode *inode; |
614 | int err; | |
615 | ||
616 | inode = iget5_locked(sb, ino, nilfs_iget_test, nilfs_iget_set, &args); | |
617 | if (unlikely(!inode)) | |
618 | return ERR_PTR(-ENOMEM); | |
619 | if (!(inode->i_state & I_NEW)) | |
620 | return inode; | |
621 | ||
622 | err = nilfs_init_gcinode(inode); | |
623 | if (unlikely(err)) { | |
624 | iget_failed(inode); | |
625 | return ERR_PTR(err); | |
626 | } | |
627 | unlock_new_inode(inode); | |
628 | return inode; | |
629 | } | |
630 | ||
05fe58fd RK |
631 | void nilfs_write_inode_common(struct inode *inode, |
632 | struct nilfs_inode *raw_inode, int has_bmap) | |
633 | { | |
634 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
635 | ||
636 | raw_inode->i_mode = cpu_to_le16(inode->i_mode); | |
305d3d0d EB |
637 | raw_inode->i_uid = cpu_to_le32(i_uid_read(inode)); |
638 | raw_inode->i_gid = cpu_to_le32(i_gid_read(inode)); | |
05fe58fd RK |
639 | raw_inode->i_links_count = cpu_to_le16(inode->i_nlink); |
640 | raw_inode->i_size = cpu_to_le64(inode->i_size); | |
641 | raw_inode->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
642 | raw_inode->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec); | |
61239230 RK |
643 | raw_inode->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); |
644 | raw_inode->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec); | |
05fe58fd RK |
645 | raw_inode->i_blocks = cpu_to_le64(inode->i_blocks); |
646 | ||
05fe58fd RK |
647 | raw_inode->i_flags = cpu_to_le32(ii->i_flags); |
648 | raw_inode->i_generation = cpu_to_le32(inode->i_generation); | |
649 | ||
56eb5538 RK |
650 | if (NILFS_ROOT_METADATA_FILE(inode->i_ino)) { |
651 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; | |
652 | ||
653 | /* zero-fill unused portion in the case of super root block */ | |
654 | raw_inode->i_xattr = 0; | |
655 | raw_inode->i_pad = 0; | |
656 | memset((void *)raw_inode + sizeof(*raw_inode), 0, | |
657 | nilfs->ns_inode_size - sizeof(*raw_inode)); | |
658 | } | |
659 | ||
05fe58fd RK |
660 | if (has_bmap) |
661 | nilfs_bmap_write(ii->i_bmap, raw_inode); | |
662 | else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) | |
663 | raw_inode->i_device_code = | |
cdce214e | 664 | cpu_to_le64(huge_encode_dev(inode->i_rdev)); |
05fe58fd RK |
665 | /* When extending inode, nilfs->ns_inode_size should be checked |
666 | for substitutions of appended fields */ | |
667 | } | |
668 | ||
b9f66140 | 669 | void nilfs_update_inode(struct inode *inode, struct buffer_head *ibh, int flags) |
05fe58fd RK |
670 | { |
671 | ino_t ino = inode->i_ino; | |
672 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
e912a5b6 | 673 | struct inode *ifile = ii->i_root->ifile; |
05fe58fd RK |
674 | struct nilfs_inode *raw_inode; |
675 | ||
e912a5b6 | 676 | raw_inode = nilfs_ifile_map_inode(ifile, ino, ibh); |
05fe58fd | 677 | |
05fe58fd | 678 | if (test_and_clear_bit(NILFS_I_NEW, &ii->i_state)) |
e912a5b6 | 679 | memset(raw_inode, 0, NILFS_MDT(ifile)->mi_entry_size); |
b9f66140 AR |
680 | if (flags & I_DIRTY_DATASYNC) |
681 | set_bit(NILFS_I_INODE_SYNC, &ii->i_state); | |
05fe58fd RK |
682 | |
683 | nilfs_write_inode_common(inode, raw_inode, 0); | |
684 | /* XXX: call with has_bmap = 0 is a workaround to avoid | |
685 | deadlock of bmap. This delays update of i_bmap to just | |
686 | before writing */ | |
e912a5b6 | 687 | nilfs_ifile_unmap_inode(ifile, ino, ibh); |
05fe58fd RK |
688 | } |
689 | ||
690 | #define NILFS_MAX_TRUNCATE_BLOCKS 16384 /* 64MB for 4KB block */ | |
691 | ||
692 | static void nilfs_truncate_bmap(struct nilfs_inode_info *ii, | |
693 | unsigned long from) | |
694 | { | |
3568a13f | 695 | __u64 b; |
05fe58fd RK |
696 | int ret; |
697 | ||
698 | if (!test_bit(NILFS_I_BMAP, &ii->i_state)) | |
699 | return; | |
e828949e | 700 | repeat: |
05fe58fd RK |
701 | ret = nilfs_bmap_last_key(ii->i_bmap, &b); |
702 | if (ret == -ENOENT) | |
703 | return; | |
704 | else if (ret < 0) | |
705 | goto failed; | |
706 | ||
707 | if (b < from) | |
708 | return; | |
709 | ||
3568a13f | 710 | b -= min_t(__u64, NILFS_MAX_TRUNCATE_BLOCKS, b - from); |
05fe58fd RK |
711 | ret = nilfs_bmap_truncate(ii->i_bmap, b); |
712 | nilfs_relax_pressure_in_lock(ii->vfs_inode.i_sb); | |
713 | if (!ret || (ret == -ENOMEM && | |
714 | nilfs_bmap_truncate(ii->i_bmap, b) == 0)) | |
715 | goto repeat; | |
716 | ||
e828949e RK |
717 | failed: |
718 | nilfs_warning(ii->vfs_inode.i_sb, __func__, | |
719 | "failed to truncate bmap (ino=%lu, err=%d)", | |
720 | ii->vfs_inode.i_ino, ret); | |
05fe58fd RK |
721 | } |
722 | ||
723 | void nilfs_truncate(struct inode *inode) | |
724 | { | |
725 | unsigned long blkoff; | |
726 | unsigned int blocksize; | |
727 | struct nilfs_transaction_info ti; | |
728 | struct super_block *sb = inode->i_sb; | |
729 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
05fe58fd RK |
730 | |
731 | if (!test_bit(NILFS_I_BMAP, &ii->i_state)) | |
732 | return; | |
733 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
734 | return; | |
735 | ||
736 | blocksize = sb->s_blocksize; | |
737 | blkoff = (inode->i_size + blocksize - 1) >> sb->s_blocksize_bits; | |
1f5abe7e | 738 | nilfs_transaction_begin(sb, &ti, 0); /* never fails */ |
05fe58fd RK |
739 | |
740 | block_truncate_page(inode->i_mapping, inode->i_size, nilfs_get_block); | |
741 | ||
742 | nilfs_truncate_bmap(ii, blkoff); | |
743 | ||
744 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
745 | if (IS_SYNC(inode)) | |
746 | nilfs_set_transaction_flag(NILFS_TI_SYNC); | |
747 | ||
abdb318b | 748 | nilfs_mark_inode_dirty(inode); |
bcbc8c64 | 749 | nilfs_set_file_dirty(inode, 0); |
47420c79 | 750 | nilfs_transaction_commit(sb); |
05fe58fd RK |
751 | /* May construct a logical segment and may fail in sync mode. |
752 | But truncate has no return value. */ | |
753 | } | |
754 | ||
6fd1e5c9 AV |
755 | static void nilfs_clear_inode(struct inode *inode) |
756 | { | |
757 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
758 | ||
759 | /* | |
760 | * Free resources allocated in nilfs_read_inode(), here. | |
761 | */ | |
762 | BUG_ON(!list_empty(&ii->i_dirty)); | |
763 | brelse(ii->i_bh); | |
764 | ii->i_bh = NULL; | |
765 | ||
2d19961d RK |
766 | if (nilfs_is_metadata_file_inode(inode)) |
767 | nilfs_mdt_clear(inode); | |
518d1a6a | 768 | |
6fd1e5c9 AV |
769 | if (test_bit(NILFS_I_BMAP, &ii->i_state)) |
770 | nilfs_bmap_clear(ii->i_bmap); | |
771 | ||
772 | nilfs_btnode_cache_clear(&ii->i_btnode_cache); | |
4d8d9293 RK |
773 | |
774 | if (ii->i_root && inode->i_ino == NILFS_ROOT_INO) | |
775 | nilfs_put_root(ii->i_root); | |
6fd1e5c9 AV |
776 | } |
777 | ||
778 | void nilfs_evict_inode(struct inode *inode) | |
05fe58fd RK |
779 | { |
780 | struct nilfs_transaction_info ti; | |
781 | struct super_block *sb = inode->i_sb; | |
782 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
25b18d39 | 783 | int ret; |
05fe58fd | 784 | |
4d8d9293 | 785 | if (inode->i_nlink || !ii->i_root || unlikely(is_bad_inode(inode))) { |
91b0abe3 | 786 | truncate_inode_pages_final(&inode->i_data); |
dbd5768f | 787 | clear_inode(inode); |
6fd1e5c9 | 788 | nilfs_clear_inode(inode); |
05fe58fd RK |
789 | return; |
790 | } | |
1f5abe7e RK |
791 | nilfs_transaction_begin(sb, &ti, 0); /* never fails */ |
792 | ||
91b0abe3 | 793 | truncate_inode_pages_final(&inode->i_data); |
05fe58fd | 794 | |
e912a5b6 | 795 | /* TODO: some of the following operations may fail. */ |
05fe58fd | 796 | nilfs_truncate_bmap(ii, 0); |
abdb318b | 797 | nilfs_mark_inode_dirty(inode); |
dbd5768f | 798 | clear_inode(inode); |
e912a5b6 | 799 | |
25b18d39 RK |
800 | ret = nilfs_ifile_delete_inode(ii->i_root->ifile, inode->i_ino); |
801 | if (!ret) | |
e5f7f848 | 802 | atomic64_dec(&ii->i_root->inodes_count); |
e912a5b6 | 803 | |
6fd1e5c9 | 804 | nilfs_clear_inode(inode); |
e912a5b6 | 805 | |
05fe58fd RK |
806 | if (IS_SYNC(inode)) |
807 | nilfs_set_transaction_flag(NILFS_TI_SYNC); | |
47420c79 | 808 | nilfs_transaction_commit(sb); |
05fe58fd RK |
809 | /* May construct a logical segment and may fail in sync mode. |
810 | But delete_inode has no return value. */ | |
811 | } | |
812 | ||
813 | int nilfs_setattr(struct dentry *dentry, struct iattr *iattr) | |
814 | { | |
815 | struct nilfs_transaction_info ti; | |
2b0143b5 | 816 | struct inode *inode = d_inode(dentry); |
05fe58fd | 817 | struct super_block *sb = inode->i_sb; |
47420c79 | 818 | int err; |
05fe58fd RK |
819 | |
820 | err = inode_change_ok(inode, iattr); | |
821 | if (err) | |
822 | return err; | |
823 | ||
824 | err = nilfs_transaction_begin(sb, &ti, 0); | |
825 | if (unlikely(err)) | |
826 | return err; | |
1025774c CH |
827 | |
828 | if ((iattr->ia_valid & ATTR_SIZE) && | |
829 | iattr->ia_size != i_size_read(inode)) { | |
562c72aa | 830 | inode_dio_wait(inode); |
2d1b399b MS |
831 | truncate_setsize(inode, iattr->ia_size); |
832 | nilfs_truncate(inode); | |
1025774c CH |
833 | } |
834 | ||
835 | setattr_copy(inode, iattr); | |
836 | mark_inode_dirty(inode); | |
837 | ||
838 | if (iattr->ia_valid & ATTR_MODE) { | |
05fe58fd | 839 | err = nilfs_acl_chmod(inode); |
1025774c CH |
840 | if (unlikely(err)) |
841 | goto out_err; | |
842 | } | |
843 | ||
844 | return nilfs_transaction_commit(sb); | |
47420c79 | 845 | |
1025774c CH |
846 | out_err: |
847 | nilfs_transaction_abort(sb); | |
47420c79 | 848 | return err; |
05fe58fd RK |
849 | } |
850 | ||
10556cb2 | 851 | int nilfs_permission(struct inode *inode, int mask) |
dc3d3b81 | 852 | { |
730e908f | 853 | struct nilfs_root *root = NILFS_I(inode)->i_root; |
dc3d3b81 RK |
854 | if ((mask & MAY_WRITE) && root && |
855 | root->cno != NILFS_CPTREE_CURRENT_CNO) | |
856 | return -EROFS; /* snapshot is not writable */ | |
857 | ||
2830ba7f | 858 | return generic_permission(inode, mask); |
dc3d3b81 RK |
859 | } |
860 | ||
bcbc8c64 | 861 | int nilfs_load_inode_block(struct inode *inode, struct buffer_head **pbh) |
05fe58fd | 862 | { |
e3154e97 | 863 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
05fe58fd RK |
864 | struct nilfs_inode_info *ii = NILFS_I(inode); |
865 | int err; | |
866 | ||
693dd321 | 867 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd | 868 | if (ii->i_bh == NULL) { |
693dd321 | 869 | spin_unlock(&nilfs->ns_inode_lock); |
e912a5b6 RK |
870 | err = nilfs_ifile_get_inode_block(ii->i_root->ifile, |
871 | inode->i_ino, pbh); | |
05fe58fd RK |
872 | if (unlikely(err)) |
873 | return err; | |
693dd321 | 874 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd RK |
875 | if (ii->i_bh == NULL) |
876 | ii->i_bh = *pbh; | |
877 | else { | |
878 | brelse(*pbh); | |
879 | *pbh = ii->i_bh; | |
880 | } | |
881 | } else | |
882 | *pbh = ii->i_bh; | |
883 | ||
884 | get_bh(*pbh); | |
693dd321 | 885 | spin_unlock(&nilfs->ns_inode_lock); |
05fe58fd RK |
886 | return 0; |
887 | } | |
888 | ||
889 | int nilfs_inode_dirty(struct inode *inode) | |
890 | { | |
891 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
e3154e97 | 892 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
05fe58fd RK |
893 | int ret = 0; |
894 | ||
895 | if (!list_empty(&ii->i_dirty)) { | |
693dd321 | 896 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd RK |
897 | ret = test_bit(NILFS_I_DIRTY, &ii->i_state) || |
898 | test_bit(NILFS_I_BUSY, &ii->i_state); | |
693dd321 | 899 | spin_unlock(&nilfs->ns_inode_lock); |
05fe58fd RK |
900 | } |
901 | return ret; | |
902 | } | |
903 | ||
bcbc8c64 | 904 | int nilfs_set_file_dirty(struct inode *inode, unsigned nr_dirty) |
05fe58fd RK |
905 | { |
906 | struct nilfs_inode_info *ii = NILFS_I(inode); | |
e3154e97 | 907 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
05fe58fd | 908 | |
693dd321 | 909 | atomic_add(nr_dirty, &nilfs->ns_ndirtyblks); |
05fe58fd | 910 | |
458c5b08 | 911 | if (test_and_set_bit(NILFS_I_DIRTY, &ii->i_state)) |
05fe58fd RK |
912 | return 0; |
913 | ||
693dd321 | 914 | spin_lock(&nilfs->ns_inode_lock); |
05fe58fd RK |
915 | if (!test_bit(NILFS_I_QUEUED, &ii->i_state) && |
916 | !test_bit(NILFS_I_BUSY, &ii->i_state)) { | |
917 | /* Because this routine may race with nilfs_dispose_list(), | |
918 | we have to check NILFS_I_QUEUED here, too. */ | |
919 | if (list_empty(&ii->i_dirty) && igrab(inode) == NULL) { | |
920 | /* This will happen when somebody is freeing | |
921 | this inode. */ | |
693dd321 | 922 | nilfs_warning(inode->i_sb, __func__, |
05fe58fd RK |
923 | "cannot get inode (ino=%lu)\n", |
924 | inode->i_ino); | |
693dd321 | 925 | spin_unlock(&nilfs->ns_inode_lock); |
05fe58fd RK |
926 | return -EINVAL; /* NILFS_I_DIRTY may remain for |
927 | freeing inode */ | |
928 | } | |
eaae0f37 | 929 | list_move_tail(&ii->i_dirty, &nilfs->ns_dirty_files); |
05fe58fd RK |
930 | set_bit(NILFS_I_QUEUED, &ii->i_state); |
931 | } | |
693dd321 | 932 | spin_unlock(&nilfs->ns_inode_lock); |
05fe58fd RK |
933 | return 0; |
934 | } | |
935 | ||
b9f66140 | 936 | int __nilfs_mark_inode_dirty(struct inode *inode, int flags) |
05fe58fd | 937 | { |
05fe58fd RK |
938 | struct buffer_head *ibh; |
939 | int err; | |
940 | ||
bcbc8c64 | 941 | err = nilfs_load_inode_block(inode, &ibh); |
05fe58fd RK |
942 | if (unlikely(err)) { |
943 | nilfs_warning(inode->i_sb, __func__, | |
944 | "failed to reget inode block.\n"); | |
945 | return err; | |
946 | } | |
b9f66140 | 947 | nilfs_update_inode(inode, ibh, flags); |
5fc7b141 | 948 | mark_buffer_dirty(ibh); |
e912a5b6 | 949 | nilfs_mdt_mark_dirty(NILFS_I(inode)->i_root->ifile); |
05fe58fd RK |
950 | brelse(ibh); |
951 | return 0; | |
952 | } | |
953 | ||
954 | /** | |
955 | * nilfs_dirty_inode - reflect changes on given inode to an inode block. | |
956 | * @inode: inode of the file to be registered. | |
957 | * | |
958 | * nilfs_dirty_inode() loads a inode block containing the specified | |
959 | * @inode and copies data from a nilfs_inode to a corresponding inode | |
960 | * entry in the inode block. This operation is excluded from the segment | |
961 | * construction. This function can be called both as a single operation | |
962 | * and as a part of indivisible file operations. | |
963 | */ | |
aa385729 | 964 | void nilfs_dirty_inode(struct inode *inode, int flags) |
05fe58fd RK |
965 | { |
966 | struct nilfs_transaction_info ti; | |
7d6cd92f | 967 | struct nilfs_mdt_info *mdi = NILFS_MDT(inode); |
05fe58fd RK |
968 | |
969 | if (is_bad_inode(inode)) { | |
970 | nilfs_warning(inode->i_sb, __func__, | |
971 | "tried to mark bad_inode dirty. ignored.\n"); | |
972 | dump_stack(); | |
973 | return; | |
974 | } | |
7d6cd92f RK |
975 | if (mdi) { |
976 | nilfs_mdt_mark_dirty(inode); | |
977 | return; | |
978 | } | |
05fe58fd | 979 | nilfs_transaction_begin(inode->i_sb, &ti, 0); |
b9f66140 | 980 | __nilfs_mark_inode_dirty(inode, flags); |
47420c79 | 981 | nilfs_transaction_commit(inode->i_sb); /* never fails */ |
05fe58fd | 982 | } |
622daaff RK |
983 | |
984 | int nilfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, | |
985 | __u64 start, __u64 len) | |
986 | { | |
0ef28f9a | 987 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
622daaff RK |
988 | __u64 logical = 0, phys = 0, size = 0; |
989 | __u32 flags = 0; | |
990 | loff_t isize; | |
991 | sector_t blkoff, end_blkoff; | |
992 | sector_t delalloc_blkoff; | |
993 | unsigned long delalloc_blklen; | |
994 | unsigned int blkbits = inode->i_blkbits; | |
995 | int ret, n; | |
996 | ||
997 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
998 | if (ret) | |
999 | return ret; | |
1000 | ||
5955102c | 1001 | inode_lock(inode); |
622daaff RK |
1002 | |
1003 | isize = i_size_read(inode); | |
1004 | ||
1005 | blkoff = start >> blkbits; | |
1006 | end_blkoff = (start + len - 1) >> blkbits; | |
1007 | ||
1008 | delalloc_blklen = nilfs_find_uncommitted_extent(inode, blkoff, | |
1009 | &delalloc_blkoff); | |
1010 | ||
1011 | do { | |
1012 | __u64 blkphy; | |
1013 | unsigned int maxblocks; | |
1014 | ||
1015 | if (delalloc_blklen && blkoff == delalloc_blkoff) { | |
1016 | if (size) { | |
1017 | /* End of the current extent */ | |
1018 | ret = fiemap_fill_next_extent( | |
1019 | fieinfo, logical, phys, size, flags); | |
1020 | if (ret) | |
1021 | break; | |
1022 | } | |
1023 | if (blkoff > end_blkoff) | |
1024 | break; | |
1025 | ||
1026 | flags = FIEMAP_EXTENT_MERGED | FIEMAP_EXTENT_DELALLOC; | |
1027 | logical = blkoff << blkbits; | |
1028 | phys = 0; | |
1029 | size = delalloc_blklen << blkbits; | |
1030 | ||
1031 | blkoff = delalloc_blkoff + delalloc_blklen; | |
1032 | delalloc_blklen = nilfs_find_uncommitted_extent( | |
1033 | inode, blkoff, &delalloc_blkoff); | |
1034 | continue; | |
1035 | } | |
1036 | ||
1037 | /* | |
1038 | * Limit the number of blocks that we look up so as | |
1039 | * not to get into the next delayed allocation extent. | |
1040 | */ | |
1041 | maxblocks = INT_MAX; | |
1042 | if (delalloc_blklen) | |
1043 | maxblocks = min_t(sector_t, delalloc_blkoff - blkoff, | |
1044 | maxblocks); | |
1045 | blkphy = 0; | |
1046 | ||
1047 | down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); | |
1048 | n = nilfs_bmap_lookup_contig( | |
1049 | NILFS_I(inode)->i_bmap, blkoff, &blkphy, maxblocks); | |
1050 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); | |
1051 | ||
1052 | if (n < 0) { | |
1053 | int past_eof; | |
1054 | ||
1055 | if (unlikely(n != -ENOENT)) | |
1056 | break; /* error */ | |
1057 | ||
1058 | /* HOLE */ | |
1059 | blkoff++; | |
1060 | past_eof = ((blkoff << blkbits) >= isize); | |
1061 | ||
1062 | if (size) { | |
1063 | /* End of the current extent */ | |
1064 | ||
1065 | if (past_eof) | |
1066 | flags |= FIEMAP_EXTENT_LAST; | |
1067 | ||
1068 | ret = fiemap_fill_next_extent( | |
1069 | fieinfo, logical, phys, size, flags); | |
1070 | if (ret) | |
1071 | break; | |
1072 | size = 0; | |
1073 | } | |
1074 | if (blkoff > end_blkoff || past_eof) | |
1075 | break; | |
1076 | } else { | |
1077 | if (size) { | |
1078 | if (phys && blkphy << blkbits == phys + size) { | |
1079 | /* The current extent goes on */ | |
1080 | size += n << blkbits; | |
1081 | } else { | |
1082 | /* Terminate the current extent */ | |
1083 | ret = fiemap_fill_next_extent( | |
1084 | fieinfo, logical, phys, size, | |
1085 | flags); | |
1086 | if (ret || blkoff > end_blkoff) | |
1087 | break; | |
1088 | ||
1089 | /* Start another extent */ | |
1090 | flags = FIEMAP_EXTENT_MERGED; | |
1091 | logical = blkoff << blkbits; | |
1092 | phys = blkphy << blkbits; | |
1093 | size = n << blkbits; | |
1094 | } | |
1095 | } else { | |
1096 | /* Start a new extent */ | |
1097 | flags = FIEMAP_EXTENT_MERGED; | |
1098 | logical = blkoff << blkbits; | |
1099 | phys = blkphy << blkbits; | |
1100 | size = n << blkbits; | |
1101 | } | |
1102 | blkoff += n; | |
1103 | } | |
1104 | cond_resched(); | |
1105 | } while (true); | |
1106 | ||
1107 | /* If ret is 1 then we just hit the end of the extent array */ | |
1108 | if (ret == 1) | |
1109 | ret = 0; | |
1110 | ||
5955102c | 1111 | inode_unlock(inode); |
622daaff RK |
1112 | return ret; |
1113 | } |