Commit | Line | Data |
---|---|---|
0a8165d7 | 1 | /* |
fbfa2cc5 JK |
2 | * fs/f2fs/file.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/fs.h> | |
12 | #include <linux/f2fs_fs.h> | |
13 | #include <linux/stat.h> | |
14 | #include <linux/buffer_head.h> | |
15 | #include <linux/writeback.h> | |
ae51fb31 | 16 | #include <linux/blkdev.h> |
fbfa2cc5 JK |
17 | #include <linux/falloc.h> |
18 | #include <linux/types.h> | |
e9750824 | 19 | #include <linux/compat.h> |
fbfa2cc5 JK |
20 | #include <linux/uaccess.h> |
21 | #include <linux/mount.h> | |
7f7670fe | 22 | #include <linux/pagevec.h> |
fbfa2cc5 JK |
23 | |
24 | #include "f2fs.h" | |
25 | #include "node.h" | |
26 | #include "segment.h" | |
27 | #include "xattr.h" | |
28 | #include "acl.h" | |
a2a4a7e4 | 29 | #include <trace/events/f2fs.h> |
fbfa2cc5 JK |
30 | |
31 | static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma, | |
32 | struct vm_fault *vmf) | |
33 | { | |
34 | struct page *page = vmf->page; | |
6131ffaa | 35 | struct inode *inode = file_inode(vma->vm_file); |
4081363f | 36 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 | 37 | struct dnode_of_data dn; |
e479556b | 38 | int err; |
fbfa2cc5 JK |
39 | |
40 | f2fs_balance_fs(sbi); | |
41 | ||
42 | sb_start_pagefault(inode->i_sb); | |
43 | ||
b067ba1f JK |
44 | /* force to convert with normal data indices */ |
45 | err = f2fs_convert_inline_data(inode, MAX_INLINE_DATA + 1, page); | |
46 | if (err) | |
47 | goto out; | |
48 | ||
fbfa2cc5 | 49 | /* block allocation */ |
e479556b | 50 | f2fs_lock_op(sbi); |
fbfa2cc5 | 51 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
b600965c | 52 | err = f2fs_reserve_block(&dn, page->index); |
e479556b | 53 | f2fs_unlock_op(sbi); |
b600965c HL |
54 | if (err) |
55 | goto out; | |
fbfa2cc5 | 56 | |
9851e6e1 | 57 | file_update_time(vma->vm_file); |
fbfa2cc5 | 58 | lock_page(page); |
6bacf52f | 59 | if (unlikely(page->mapping != inode->i_mapping || |
9851e6e1 | 60 | page_offset(page) > i_size_read(inode) || |
6bacf52f | 61 | !PageUptodate(page))) { |
fbfa2cc5 JK |
62 | unlock_page(page); |
63 | err = -EFAULT; | |
64 | goto out; | |
65 | } | |
66 | ||
67 | /* | |
68 | * check to see if the page is mapped already (no holes) | |
69 | */ | |
70 | if (PageMappedToDisk(page)) | |
9851e6e1 | 71 | goto mapped; |
fbfa2cc5 JK |
72 | |
73 | /* page is wholly or partially inside EOF */ | |
74 | if (((page->index + 1) << PAGE_CACHE_SHIFT) > i_size_read(inode)) { | |
75 | unsigned offset; | |
76 | offset = i_size_read(inode) & ~PAGE_CACHE_MASK; | |
77 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
78 | } | |
79 | set_page_dirty(page); | |
80 | SetPageUptodate(page); | |
81 | ||
e943a10d | 82 | trace_f2fs_vm_page_mkwrite(page, DATA); |
9851e6e1 NJ |
83 | mapped: |
84 | /* fill the page */ | |
3cb5ad15 | 85 | f2fs_wait_on_page_writeback(page, DATA); |
fbfa2cc5 JK |
86 | out: |
87 | sb_end_pagefault(inode->i_sb); | |
88 | return block_page_mkwrite_return(err); | |
89 | } | |
90 | ||
91 | static const struct vm_operations_struct f2fs_file_vm_ops = { | |
692bb55d | 92 | .fault = filemap_fault, |
f1820361 | 93 | .map_pages = filemap_map_pages, |
692bb55d JK |
94 | .page_mkwrite = f2fs_vm_page_mkwrite, |
95 | .remap_pages = generic_file_remap_pages, | |
fbfa2cc5 JK |
96 | }; |
97 | ||
354a3399 JK |
98 | static int get_parent_ino(struct inode *inode, nid_t *pino) |
99 | { | |
100 | struct dentry *dentry; | |
101 | ||
102 | inode = igrab(inode); | |
103 | dentry = d_find_any_alias(inode); | |
104 | iput(inode); | |
105 | if (!dentry) | |
106 | return 0; | |
107 | ||
f0947e5c JK |
108 | if (update_dent_inode(inode, &dentry->d_name)) { |
109 | dput(dentry); | |
110 | return 0; | |
111 | } | |
354a3399 | 112 | |
f0947e5c JK |
113 | *pino = parent_ino(dentry); |
114 | dput(dentry); | |
354a3399 JK |
115 | return 1; |
116 | } | |
117 | ||
9d1589ef CY |
118 | static inline bool need_do_checkpoint(struct inode *inode) |
119 | { | |
4081363f | 120 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
9d1589ef CY |
121 | bool need_cp = false; |
122 | ||
123 | if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1) | |
124 | need_cp = true; | |
125 | else if (file_wrong_pino(inode)) | |
126 | need_cp = true; | |
127 | else if (!space_for_roll_forward(sbi)) | |
128 | need_cp = true; | |
129 | else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino)) | |
130 | need_cp = true; | |
131 | else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi))) | |
132 | need_cp = true; | |
133 | ||
134 | return need_cp; | |
135 | } | |
136 | ||
fbfa2cc5 JK |
137 | int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) |
138 | { | |
139 | struct inode *inode = file->f_mapping->host; | |
d928bfbf | 140 | struct f2fs_inode_info *fi = F2FS_I(inode); |
4081363f | 141 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
2403c155 | 142 | nid_t ino = inode->i_ino; |
fbfa2cc5 JK |
143 | int ret = 0; |
144 | bool need_cp = false; | |
145 | struct writeback_control wbc = { | |
c81bf1c8 | 146 | .sync_mode = WB_SYNC_ALL, |
fbfa2cc5 JK |
147 | .nr_to_write = LONG_MAX, |
148 | .for_reclaim = 0, | |
149 | }; | |
150 | ||
6bacf52f | 151 | if (unlikely(f2fs_readonly(inode->i_sb))) |
1fa95b0b NJ |
152 | return 0; |
153 | ||
a2a4a7e4 | 154 | trace_f2fs_sync_file_enter(inode); |
ea1aa12c JK |
155 | |
156 | /* if fdatasync is triggered, let's do in-place-update */ | |
157 | if (datasync) | |
158 | set_inode_flag(fi, FI_NEED_IPU); | |
159 | ||
fbfa2cc5 | 160 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
ea1aa12c JK |
161 | if (datasync) |
162 | clear_inode_flag(fi, FI_NEED_IPU); | |
a2a4a7e4 NJ |
163 | if (ret) { |
164 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); | |
fbfa2cc5 | 165 | return ret; |
a2a4a7e4 | 166 | } |
fbfa2cc5 | 167 | |
6d99ba41 JK |
168 | /* |
169 | * if there is no written data, don't waste time to write recovery info. | |
170 | */ | |
171 | if (!is_inode_flag_set(fi, FI_APPEND_WRITE) && | |
2403c155 | 172 | !exist_written_data(sbi, ino, APPEND_INO)) { |
6d99ba41 | 173 | if (is_inode_flag_set(fi, FI_UPDATE_WRITE) || |
2403c155 | 174 | exist_written_data(sbi, ino, UPDATE_INO)) |
6d99ba41 JK |
175 | goto flush_out; |
176 | goto out; | |
177 | } | |
178 | ||
7d82db83 JK |
179 | /* guarantee free sections for fsync */ |
180 | f2fs_balance_fs(sbi); | |
181 | ||
e5d2385e JK |
182 | /* |
183 | * Both of fdatasync() and fsync() are able to be recovered from | |
184 | * sudden-power-off. | |
185 | */ | |
9d1589ef CY |
186 | down_read(&fi->i_sem); |
187 | need_cp = need_do_checkpoint(inode); | |
d928bfbf JK |
188 | up_read(&fi->i_sem); |
189 | ||
fbfa2cc5 | 190 | if (need_cp) { |
354a3399 JK |
191 | nid_t pino; |
192 | ||
fbfa2cc5 JK |
193 | /* all the dirty node pages should be flushed for POR */ |
194 | ret = f2fs_sync_fs(inode->i_sb, 1); | |
d928bfbf JK |
195 | |
196 | down_write(&fi->i_sem); | |
197 | F2FS_I(inode)->xattr_ver = 0; | |
354a3399 JK |
198 | if (file_wrong_pino(inode) && inode->i_nlink == 1 && |
199 | get_parent_ino(inode, &pino)) { | |
200 | F2FS_I(inode)->i_pino = pino; | |
201 | file_got_pino(inode); | |
d928bfbf | 202 | up_write(&fi->i_sem); |
354a3399 JK |
203 | mark_inode_dirty_sync(inode); |
204 | ret = f2fs_write_inode(inode, NULL); | |
205 | if (ret) | |
206 | goto out; | |
d928bfbf JK |
207 | } else { |
208 | up_write(&fi->i_sem); | |
354a3399 | 209 | } |
fbfa2cc5 | 210 | } else { |
398b1ac5 | 211 | /* if there is no written node page, write its inode page */ |
2403c155 JK |
212 | while (!sync_node_pages(sbi, ino, &wbc)) { |
213 | if (fsync_mark_done(sbi, ino)) | |
479f40c4 | 214 | goto out; |
b3783873 | 215 | mark_inode_dirty_sync(inode); |
398b1ac5 JK |
216 | ret = f2fs_write_inode(inode, NULL); |
217 | if (ret) | |
218 | goto out; | |
219 | } | |
2403c155 | 220 | ret = wait_on_node_pages_writeback(sbi, ino); |
cfe58f9d JK |
221 | if (ret) |
222 | goto out; | |
6d99ba41 JK |
223 | |
224 | /* once recovery info is written, don't need to tack this */ | |
2403c155 | 225 | remove_dirty_inode(sbi, ino, APPEND_INO); |
6d99ba41 JK |
226 | clear_inode_flag(fi, FI_APPEND_WRITE); |
227 | flush_out: | |
2403c155 | 228 | remove_dirty_inode(sbi, ino, UPDATE_INO); |
6d99ba41 | 229 | clear_inode_flag(fi, FI_UPDATE_WRITE); |
4081363f | 230 | ret = f2fs_issue_flush(F2FS_I_SB(inode)); |
fbfa2cc5 JK |
231 | } |
232 | out: | |
a2a4a7e4 | 233 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); |
fbfa2cc5 JK |
234 | return ret; |
235 | } | |
236 | ||
7f7670fe JK |
237 | static pgoff_t __get_first_dirty_index(struct address_space *mapping, |
238 | pgoff_t pgofs, int whence) | |
239 | { | |
240 | struct pagevec pvec; | |
241 | int nr_pages; | |
242 | ||
243 | if (whence != SEEK_DATA) | |
244 | return 0; | |
245 | ||
246 | /* find first dirty page index */ | |
247 | pagevec_init(&pvec, 0); | |
65b85ccc JK |
248 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs, |
249 | PAGECACHE_TAG_DIRTY, 1); | |
250 | pgofs = nr_pages ? pvec.pages[0]->index : LONG_MAX; | |
7f7670fe JK |
251 | pagevec_release(&pvec); |
252 | return pgofs; | |
253 | } | |
254 | ||
255 | static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs, | |
256 | int whence) | |
257 | { | |
258 | switch (whence) { | |
259 | case SEEK_DATA: | |
260 | if ((blkaddr == NEW_ADDR && dirty == pgofs) || | |
261 | (blkaddr != NEW_ADDR && blkaddr != NULL_ADDR)) | |
262 | return true; | |
263 | break; | |
264 | case SEEK_HOLE: | |
265 | if (blkaddr == NULL_ADDR) | |
266 | return true; | |
267 | break; | |
268 | } | |
269 | return false; | |
270 | } | |
271 | ||
267378d4 CY |
272 | static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence) |
273 | { | |
274 | struct inode *inode = file->f_mapping->host; | |
275 | loff_t maxbytes = inode->i_sb->s_maxbytes; | |
276 | struct dnode_of_data dn; | |
7f7670fe JK |
277 | pgoff_t pgofs, end_offset, dirty; |
278 | loff_t data_ofs = offset; | |
279 | loff_t isize; | |
267378d4 CY |
280 | int err = 0; |
281 | ||
282 | mutex_lock(&inode->i_mutex); | |
283 | ||
284 | isize = i_size_read(inode); | |
285 | if (offset >= isize) | |
286 | goto fail; | |
287 | ||
288 | /* handle inline data case */ | |
289 | if (f2fs_has_inline_data(inode)) { | |
290 | if (whence == SEEK_HOLE) | |
291 | data_ofs = isize; | |
292 | goto found; | |
293 | } | |
294 | ||
295 | pgofs = (pgoff_t)(offset >> PAGE_CACHE_SHIFT); | |
296 | ||
7f7670fe JK |
297 | dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence); |
298 | ||
267378d4 CY |
299 | for (; data_ofs < isize; data_ofs = pgofs << PAGE_CACHE_SHIFT) { |
300 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
301 | err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE_RA); | |
302 | if (err && err != -ENOENT) { | |
303 | goto fail; | |
304 | } else if (err == -ENOENT) { | |
e1c42045 | 305 | /* direct node does not exists */ |
267378d4 CY |
306 | if (whence == SEEK_DATA) { |
307 | pgofs = PGOFS_OF_NEXT_DNODE(pgofs, | |
308 | F2FS_I(inode)); | |
309 | continue; | |
310 | } else { | |
311 | goto found; | |
312 | } | |
313 | } | |
314 | ||
6b2920a5 | 315 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
267378d4 CY |
316 | |
317 | /* find data/hole in dnode block */ | |
318 | for (; dn.ofs_in_node < end_offset; | |
319 | dn.ofs_in_node++, pgofs++, | |
320 | data_ofs = pgofs << PAGE_CACHE_SHIFT) { | |
321 | block_t blkaddr; | |
322 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
323 | ||
7f7670fe | 324 | if (__found_offset(blkaddr, dirty, pgofs, whence)) { |
267378d4 CY |
325 | f2fs_put_dnode(&dn); |
326 | goto found; | |
327 | } | |
328 | } | |
329 | f2fs_put_dnode(&dn); | |
330 | } | |
331 | ||
332 | if (whence == SEEK_DATA) | |
333 | goto fail; | |
267378d4 | 334 | found: |
fe369bc8 JK |
335 | if (whence == SEEK_HOLE && data_ofs > isize) |
336 | data_ofs = isize; | |
267378d4 CY |
337 | mutex_unlock(&inode->i_mutex); |
338 | return vfs_setpos(file, data_ofs, maxbytes); | |
339 | fail: | |
340 | mutex_unlock(&inode->i_mutex); | |
341 | return -ENXIO; | |
342 | } | |
343 | ||
344 | static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence) | |
345 | { | |
346 | struct inode *inode = file->f_mapping->host; | |
347 | loff_t maxbytes = inode->i_sb->s_maxbytes; | |
348 | ||
349 | switch (whence) { | |
350 | case SEEK_SET: | |
351 | case SEEK_CUR: | |
352 | case SEEK_END: | |
353 | return generic_file_llseek_size(file, offset, whence, | |
354 | maxbytes, i_size_read(inode)); | |
355 | case SEEK_DATA: | |
356 | case SEEK_HOLE: | |
0b4c5afd JK |
357 | if (offset < 0) |
358 | return -ENXIO; | |
267378d4 CY |
359 | return f2fs_seek_block(file, offset, whence); |
360 | } | |
361 | ||
362 | return -EINVAL; | |
363 | } | |
364 | ||
fbfa2cc5 JK |
365 | static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma) |
366 | { | |
367 | file_accessed(file); | |
368 | vma->vm_ops = &f2fs_file_vm_ops; | |
369 | return 0; | |
370 | } | |
371 | ||
b292dcab | 372 | int truncate_data_blocks_range(struct dnode_of_data *dn, int count) |
fbfa2cc5 JK |
373 | { |
374 | int nr_free = 0, ofs = dn->ofs_in_node; | |
4081363f | 375 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
fbfa2cc5 JK |
376 | struct f2fs_node *raw_node; |
377 | __le32 *addr; | |
378 | ||
45590710 | 379 | raw_node = F2FS_NODE(dn->node_page); |
fbfa2cc5 JK |
380 | addr = blkaddr_in_node(raw_node) + ofs; |
381 | ||
6c311ec6 | 382 | for (; count > 0; count--, addr++, dn->ofs_in_node++) { |
fbfa2cc5 JK |
383 | block_t blkaddr = le32_to_cpu(*addr); |
384 | if (blkaddr == NULL_ADDR) | |
385 | continue; | |
386 | ||
387 | update_extent_cache(NULL_ADDR, dn); | |
388 | invalidate_blocks(sbi, blkaddr); | |
fbfa2cc5 JK |
389 | nr_free++; |
390 | } | |
391 | if (nr_free) { | |
d7cc950b | 392 | dec_valid_block_count(sbi, dn->inode, nr_free); |
fbfa2cc5 JK |
393 | set_page_dirty(dn->node_page); |
394 | sync_inode_page(dn); | |
395 | } | |
396 | dn->ofs_in_node = ofs; | |
51dd6249 NJ |
397 | |
398 | trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid, | |
399 | dn->ofs_in_node, nr_free); | |
fbfa2cc5 JK |
400 | return nr_free; |
401 | } | |
402 | ||
403 | void truncate_data_blocks(struct dnode_of_data *dn) | |
404 | { | |
405 | truncate_data_blocks_range(dn, ADDRS_PER_BLOCK); | |
406 | } | |
407 | ||
408 | static void truncate_partial_data_page(struct inode *inode, u64 from) | |
409 | { | |
410 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
411 | struct page *page; | |
412 | ||
8aa6f1c5 CY |
413 | if (f2fs_has_inline_data(inode)) |
414 | return truncate_inline_data(inode, from); | |
415 | ||
fbfa2cc5 JK |
416 | if (!offset) |
417 | return; | |
418 | ||
c718379b | 419 | page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, false); |
fbfa2cc5 JK |
420 | if (IS_ERR(page)) |
421 | return; | |
422 | ||
423 | lock_page(page); | |
ca0a81b3 CY |
424 | if (unlikely(!PageUptodate(page) || |
425 | page->mapping != inode->i_mapping)) | |
426 | goto out; | |
427 | ||
3cb5ad15 | 428 | f2fs_wait_on_page_writeback(page, DATA); |
fbfa2cc5 JK |
429 | zero_user(page, offset, PAGE_CACHE_SIZE - offset); |
430 | set_page_dirty(page); | |
ca0a81b3 CY |
431 | |
432 | out: | |
fbfa2cc5 JK |
433 | f2fs_put_page(page, 1); |
434 | } | |
435 | ||
764aa3e9 | 436 | int truncate_blocks(struct inode *inode, u64 from, bool lock) |
fbfa2cc5 | 437 | { |
4081363f | 438 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 JK |
439 | unsigned int blocksize = inode->i_sb->s_blocksize; |
440 | struct dnode_of_data dn; | |
441 | pgoff_t free_from; | |
9ffe0fb5 | 442 | int count = 0, err = 0; |
fbfa2cc5 | 443 | |
51dd6249 NJ |
444 | trace_f2fs_truncate_blocks_enter(inode, from); |
445 | ||
f185ff97 JK |
446 | if (f2fs_has_inline_data(inode)) |
447 | goto done; | |
448 | ||
fbfa2cc5 JK |
449 | free_from = (pgoff_t) |
450 | ((from + blocksize - 1) >> (sbi->log_blocksize)); | |
451 | ||
764aa3e9 JK |
452 | if (lock) |
453 | f2fs_lock_op(sbi); | |
9ffe0fb5 | 454 | |
fbfa2cc5 | 455 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 456 | err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE); |
fbfa2cc5 JK |
457 | if (err) { |
458 | if (err == -ENOENT) | |
459 | goto free_next; | |
764aa3e9 JK |
460 | if (lock) |
461 | f2fs_unlock_op(sbi); | |
51dd6249 | 462 | trace_f2fs_truncate_blocks_exit(inode, err); |
fbfa2cc5 JK |
463 | return err; |
464 | } | |
465 | ||
6403eb1f | 466 | count = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
fbfa2cc5 JK |
467 | |
468 | count -= dn.ofs_in_node; | |
9850cf4a | 469 | f2fs_bug_on(sbi, count < 0); |
39936837 | 470 | |
fbfa2cc5 JK |
471 | if (dn.ofs_in_node || IS_INODE(dn.node_page)) { |
472 | truncate_data_blocks_range(&dn, count); | |
473 | free_from += count; | |
474 | } | |
475 | ||
476 | f2fs_put_dnode(&dn); | |
477 | free_next: | |
478 | err = truncate_inode_blocks(inode, free_from); | |
764aa3e9 JK |
479 | if (lock) |
480 | f2fs_unlock_op(sbi); | |
f185ff97 | 481 | done: |
fbfa2cc5 JK |
482 | /* lastly zero out the first data page */ |
483 | truncate_partial_data_page(inode, from); | |
484 | ||
51dd6249 | 485 | trace_f2fs_truncate_blocks_exit(inode, err); |
fbfa2cc5 JK |
486 | return err; |
487 | } | |
488 | ||
489 | void f2fs_truncate(struct inode *inode) | |
490 | { | |
491 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
492 | S_ISLNK(inode->i_mode))) | |
493 | return; | |
494 | ||
51dd6249 NJ |
495 | trace_f2fs_truncate(inode); |
496 | ||
764aa3e9 | 497 | if (!truncate_blocks(inode, i_size_read(inode), true)) { |
fbfa2cc5 JK |
498 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
499 | mark_inode_dirty(inode); | |
500 | } | |
fbfa2cc5 JK |
501 | } |
502 | ||
2d4d9fb5 | 503 | int f2fs_getattr(struct vfsmount *mnt, |
fbfa2cc5 JK |
504 | struct dentry *dentry, struct kstat *stat) |
505 | { | |
506 | struct inode *inode = dentry->d_inode; | |
507 | generic_fillattr(inode, stat); | |
508 | stat->blocks <<= 3; | |
509 | return 0; | |
510 | } | |
511 | ||
512 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
513 | static void __setattr_copy(struct inode *inode, const struct iattr *attr) | |
514 | { | |
515 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
516 | unsigned int ia_valid = attr->ia_valid; | |
517 | ||
518 | if (ia_valid & ATTR_UID) | |
519 | inode->i_uid = attr->ia_uid; | |
520 | if (ia_valid & ATTR_GID) | |
521 | inode->i_gid = attr->ia_gid; | |
522 | if (ia_valid & ATTR_ATIME) | |
523 | inode->i_atime = timespec_trunc(attr->ia_atime, | |
524 | inode->i_sb->s_time_gran); | |
525 | if (ia_valid & ATTR_MTIME) | |
526 | inode->i_mtime = timespec_trunc(attr->ia_mtime, | |
527 | inode->i_sb->s_time_gran); | |
528 | if (ia_valid & ATTR_CTIME) | |
529 | inode->i_ctime = timespec_trunc(attr->ia_ctime, | |
530 | inode->i_sb->s_time_gran); | |
531 | if (ia_valid & ATTR_MODE) { | |
532 | umode_t mode = attr->ia_mode; | |
533 | ||
534 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
535 | mode &= ~S_ISGID; | |
536 | set_acl_inode(fi, mode); | |
537 | } | |
538 | } | |
539 | #else | |
540 | #define __setattr_copy setattr_copy | |
541 | #endif | |
542 | ||
543 | int f2fs_setattr(struct dentry *dentry, struct iattr *attr) | |
544 | { | |
545 | struct inode *inode = dentry->d_inode; | |
546 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
547 | int err; | |
548 | ||
549 | err = inode_change_ok(inode, attr); | |
550 | if (err) | |
551 | return err; | |
552 | ||
553 | if ((attr->ia_valid & ATTR_SIZE) && | |
554 | attr->ia_size != i_size_read(inode)) { | |
b067ba1f | 555 | err = f2fs_convert_inline_data(inode, attr->ia_size, NULL); |
9e09fc85 JK |
556 | if (err) |
557 | return err; | |
9ffe0fb5 | 558 | |
fbfa2cc5 | 559 | truncate_setsize(inode, attr->ia_size); |
9e09fc85 | 560 | f2fs_truncate(inode); |
4081363f | 561 | f2fs_balance_fs(F2FS_I_SB(inode)); |
fbfa2cc5 JK |
562 | } |
563 | ||
564 | __setattr_copy(inode, attr); | |
565 | ||
566 | if (attr->ia_valid & ATTR_MODE) { | |
a6dda0e6 | 567 | err = posix_acl_chmod(inode, get_inode_mode(inode)); |
fbfa2cc5 JK |
568 | if (err || is_inode_flag_set(fi, FI_ACL_MODE)) { |
569 | inode->i_mode = fi->i_acl_mode; | |
570 | clear_inode_flag(fi, FI_ACL_MODE); | |
571 | } | |
572 | } | |
573 | ||
574 | mark_inode_dirty(inode); | |
575 | return err; | |
576 | } | |
577 | ||
578 | const struct inode_operations f2fs_file_inode_operations = { | |
579 | .getattr = f2fs_getattr, | |
580 | .setattr = f2fs_setattr, | |
581 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 582 | .set_acl = f2fs_set_acl, |
fbfa2cc5 JK |
583 | #ifdef CONFIG_F2FS_FS_XATTR |
584 | .setxattr = generic_setxattr, | |
585 | .getxattr = generic_getxattr, | |
586 | .listxattr = f2fs_listxattr, | |
587 | .removexattr = generic_removexattr, | |
588 | #endif | |
9ab70134 | 589 | .fiemap = f2fs_fiemap, |
fbfa2cc5 JK |
590 | }; |
591 | ||
592 | static void fill_zero(struct inode *inode, pgoff_t index, | |
593 | loff_t start, loff_t len) | |
594 | { | |
4081363f | 595 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 JK |
596 | struct page *page; |
597 | ||
598 | if (!len) | |
599 | return; | |
600 | ||
bd43df02 JK |
601 | f2fs_balance_fs(sbi); |
602 | ||
e479556b | 603 | f2fs_lock_op(sbi); |
64aa7ed9 | 604 | page = get_new_data_page(inode, NULL, index, false); |
e479556b | 605 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
606 | |
607 | if (!IS_ERR(page)) { | |
3cb5ad15 | 608 | f2fs_wait_on_page_writeback(page, DATA); |
fbfa2cc5 JK |
609 | zero_user(page, start, len); |
610 | set_page_dirty(page); | |
611 | f2fs_put_page(page, 1); | |
612 | } | |
613 | } | |
614 | ||
615 | int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) | |
616 | { | |
617 | pgoff_t index; | |
618 | int err; | |
619 | ||
620 | for (index = pg_start; index < pg_end; index++) { | |
621 | struct dnode_of_data dn; | |
9eaeba70 | 622 | |
fbfa2cc5 | 623 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 624 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
fbfa2cc5 | 625 | if (err) { |
fbfa2cc5 JK |
626 | if (err == -ENOENT) |
627 | continue; | |
628 | return err; | |
629 | } | |
630 | ||
631 | if (dn.data_blkaddr != NULL_ADDR) | |
632 | truncate_data_blocks_range(&dn, 1); | |
633 | f2fs_put_dnode(&dn); | |
fbfa2cc5 JK |
634 | } |
635 | return 0; | |
636 | } | |
637 | ||
a66c7b2f | 638 | static int punch_hole(struct inode *inode, loff_t offset, loff_t len) |
fbfa2cc5 JK |
639 | { |
640 | pgoff_t pg_start, pg_end; | |
641 | loff_t off_start, off_end; | |
642 | int ret = 0; | |
643 | ||
b067ba1f | 644 | ret = f2fs_convert_inline_data(inode, MAX_INLINE_DATA + 1, NULL); |
8230a0a4 JK |
645 | if (ret) |
646 | return ret; | |
9ffe0fb5 | 647 | |
fbfa2cc5 JK |
648 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; |
649 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
650 | ||
651 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
652 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
653 | ||
654 | if (pg_start == pg_end) { | |
655 | fill_zero(inode, pg_start, off_start, | |
656 | off_end - off_start); | |
657 | } else { | |
658 | if (off_start) | |
659 | fill_zero(inode, pg_start++, off_start, | |
660 | PAGE_CACHE_SIZE - off_start); | |
661 | if (off_end) | |
662 | fill_zero(inode, pg_end, 0, off_end); | |
663 | ||
664 | if (pg_start < pg_end) { | |
665 | struct address_space *mapping = inode->i_mapping; | |
666 | loff_t blk_start, blk_end; | |
4081363f | 667 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
1127a3d4 JH |
668 | |
669 | f2fs_balance_fs(sbi); | |
fbfa2cc5 JK |
670 | |
671 | blk_start = pg_start << PAGE_CACHE_SHIFT; | |
672 | blk_end = pg_end << PAGE_CACHE_SHIFT; | |
673 | truncate_inode_pages_range(mapping, blk_start, | |
674 | blk_end - 1); | |
39936837 | 675 | |
e479556b | 676 | f2fs_lock_op(sbi); |
fbfa2cc5 | 677 | ret = truncate_hole(inode, pg_start, pg_end); |
e479556b | 678 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
679 | } |
680 | } | |
681 | ||
fbfa2cc5 JK |
682 | return ret; |
683 | } | |
684 | ||
685 | static int expand_inode_data(struct inode *inode, loff_t offset, | |
686 | loff_t len, int mode) | |
687 | { | |
4081363f | 688 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 JK |
689 | pgoff_t index, pg_start, pg_end; |
690 | loff_t new_size = i_size_read(inode); | |
691 | loff_t off_start, off_end; | |
692 | int ret = 0; | |
693 | ||
497a0930 CY |
694 | f2fs_balance_fs(sbi); |
695 | ||
fbfa2cc5 JK |
696 | ret = inode_newsize_ok(inode, (len + offset)); |
697 | if (ret) | |
698 | return ret; | |
699 | ||
b067ba1f | 700 | ret = f2fs_convert_inline_data(inode, offset + len, NULL); |
9e09fc85 JK |
701 | if (ret) |
702 | return ret; | |
703 | ||
fbfa2cc5 JK |
704 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; |
705 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
706 | ||
707 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
708 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
709 | ||
ead43275 JK |
710 | f2fs_lock_op(sbi); |
711 | ||
fbfa2cc5 JK |
712 | for (index = pg_start; index <= pg_end; index++) { |
713 | struct dnode_of_data dn; | |
714 | ||
98397ff3 JK |
715 | if (index == pg_end && !off_end) |
716 | goto noalloc; | |
717 | ||
fbfa2cc5 | 718 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
b600965c | 719 | ret = f2fs_reserve_block(&dn, index); |
b600965c | 720 | if (ret) |
fbfa2cc5 | 721 | break; |
98397ff3 | 722 | noalloc: |
fbfa2cc5 JK |
723 | if (pg_start == pg_end) |
724 | new_size = offset + len; | |
725 | else if (index == pg_start && off_start) | |
726 | new_size = (index + 1) << PAGE_CACHE_SHIFT; | |
727 | else if (index == pg_end) | |
728 | new_size = (index << PAGE_CACHE_SHIFT) + off_end; | |
729 | else | |
730 | new_size += PAGE_CACHE_SIZE; | |
731 | } | |
732 | ||
733 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
734 | i_size_read(inode) < new_size) { | |
735 | i_size_write(inode, new_size); | |
736 | mark_inode_dirty(inode); | |
ead43275 | 737 | update_inode_page(inode); |
fbfa2cc5 | 738 | } |
ead43275 | 739 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
740 | |
741 | return ret; | |
742 | } | |
743 | ||
744 | static long f2fs_fallocate(struct file *file, int mode, | |
745 | loff_t offset, loff_t len) | |
746 | { | |
6131ffaa | 747 | struct inode *inode = file_inode(file); |
fbfa2cc5 JK |
748 | long ret; |
749 | ||
750 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) | |
751 | return -EOPNOTSUPP; | |
752 | ||
3375f696 CY |
753 | mutex_lock(&inode->i_mutex); |
754 | ||
fbfa2cc5 | 755 | if (mode & FALLOC_FL_PUNCH_HOLE) |
a66c7b2f | 756 | ret = punch_hole(inode, offset, len); |
fbfa2cc5 JK |
757 | else |
758 | ret = expand_inode_data(inode, offset, len, mode); | |
759 | ||
3af60a49 NJ |
760 | if (!ret) { |
761 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
762 | mark_inode_dirty(inode); | |
763 | } | |
3375f696 CY |
764 | |
765 | mutex_unlock(&inode->i_mutex); | |
766 | ||
c01e2853 | 767 | trace_f2fs_fallocate(inode, mode, offset, len, ret); |
fbfa2cc5 JK |
768 | return ret; |
769 | } | |
770 | ||
771 | #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL)) | |
772 | #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL) | |
773 | ||
774 | static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags) | |
775 | { | |
776 | if (S_ISDIR(mode)) | |
777 | return flags; | |
778 | else if (S_ISREG(mode)) | |
779 | return flags & F2FS_REG_FLMASK; | |
780 | else | |
781 | return flags & F2FS_OTHER_FLMASK; | |
782 | } | |
783 | ||
784 | long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
785 | { | |
6131ffaa | 786 | struct inode *inode = file_inode(filp); |
fbfa2cc5 JK |
787 | struct f2fs_inode_info *fi = F2FS_I(inode); |
788 | unsigned int flags; | |
789 | int ret; | |
790 | ||
791 | switch (cmd) { | |
6a3e8ef0 | 792 | case F2FS_IOC_GETFLAGS: |
fbfa2cc5 JK |
793 | flags = fi->i_flags & FS_FL_USER_VISIBLE; |
794 | return put_user(flags, (int __user *) arg); | |
6a3e8ef0 | 795 | case F2FS_IOC_SETFLAGS: |
fbfa2cc5 JK |
796 | { |
797 | unsigned int oldflags; | |
798 | ||
bdaec334 | 799 | ret = mnt_want_write_file(filp); |
fbfa2cc5 JK |
800 | if (ret) |
801 | return ret; | |
802 | ||
803 | if (!inode_owner_or_capable(inode)) { | |
804 | ret = -EACCES; | |
805 | goto out; | |
806 | } | |
807 | ||
808 | if (get_user(flags, (int __user *) arg)) { | |
809 | ret = -EFAULT; | |
810 | goto out; | |
811 | } | |
812 | ||
813 | flags = f2fs_mask_flags(inode->i_mode, flags); | |
814 | ||
815 | mutex_lock(&inode->i_mutex); | |
816 | ||
817 | oldflags = fi->i_flags; | |
818 | ||
819 | if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { | |
820 | if (!capable(CAP_LINUX_IMMUTABLE)) { | |
821 | mutex_unlock(&inode->i_mutex); | |
822 | ret = -EPERM; | |
823 | goto out; | |
824 | } | |
825 | } | |
826 | ||
827 | flags = flags & FS_FL_USER_MODIFIABLE; | |
828 | flags |= oldflags & ~FS_FL_USER_MODIFIABLE; | |
829 | fi->i_flags = flags; | |
830 | mutex_unlock(&inode->i_mutex); | |
831 | ||
832 | f2fs_set_inode_flags(inode); | |
833 | inode->i_ctime = CURRENT_TIME; | |
834 | mark_inode_dirty(inode); | |
835 | out: | |
bdaec334 | 836 | mnt_drop_write_file(filp); |
fbfa2cc5 JK |
837 | return ret; |
838 | } | |
839 | default: | |
840 | return -ENOTTY; | |
841 | } | |
842 | } | |
843 | ||
e9750824 NJ |
844 | #ifdef CONFIG_COMPAT |
845 | long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
846 | { | |
847 | switch (cmd) { | |
848 | case F2FS_IOC32_GETFLAGS: | |
849 | cmd = F2FS_IOC_GETFLAGS; | |
850 | break; | |
851 | case F2FS_IOC32_SETFLAGS: | |
852 | cmd = F2FS_IOC_SETFLAGS; | |
853 | break; | |
854 | default: | |
855 | return -ENOIOCTLCMD; | |
856 | } | |
857 | return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); | |
858 | } | |
859 | #endif | |
860 | ||
fbfa2cc5 | 861 | const struct file_operations f2fs_file_operations = { |
267378d4 | 862 | .llseek = f2fs_llseek, |
aad4f8bb | 863 | .read = new_sync_read, |
8174202b | 864 | .write = new_sync_write, |
aad4f8bb | 865 | .read_iter = generic_file_read_iter, |
8174202b | 866 | .write_iter = generic_file_write_iter, |
fbfa2cc5 JK |
867 | .open = generic_file_open, |
868 | .mmap = f2fs_file_mmap, | |
869 | .fsync = f2fs_sync_file, | |
870 | .fallocate = f2fs_fallocate, | |
871 | .unlocked_ioctl = f2fs_ioctl, | |
e9750824 NJ |
872 | #ifdef CONFIG_COMPAT |
873 | .compat_ioctl = f2fs_compat_ioctl, | |
874 | #endif | |
fbfa2cc5 | 875 | .splice_read = generic_file_splice_read, |
8d020765 | 876 | .splice_write = iter_file_splice_write, |
fbfa2cc5 | 877 | }; |