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); |
fbfa2cc5 | 36 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
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 | ||
fbfa2cc5 | 44 | /* block allocation */ |
e479556b | 45 | f2fs_lock_op(sbi); |
fbfa2cc5 | 46 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
b600965c | 47 | err = f2fs_reserve_block(&dn, page->index); |
e479556b | 48 | f2fs_unlock_op(sbi); |
b600965c HL |
49 | if (err) |
50 | goto out; | |
fbfa2cc5 | 51 | |
9851e6e1 | 52 | file_update_time(vma->vm_file); |
fbfa2cc5 | 53 | lock_page(page); |
6bacf52f | 54 | if (unlikely(page->mapping != inode->i_mapping || |
9851e6e1 | 55 | page_offset(page) > i_size_read(inode) || |
6bacf52f | 56 | !PageUptodate(page))) { |
fbfa2cc5 JK |
57 | unlock_page(page); |
58 | err = -EFAULT; | |
59 | goto out; | |
60 | } | |
61 | ||
62 | /* | |
63 | * check to see if the page is mapped already (no holes) | |
64 | */ | |
65 | if (PageMappedToDisk(page)) | |
9851e6e1 | 66 | goto mapped; |
fbfa2cc5 JK |
67 | |
68 | /* page is wholly or partially inside EOF */ | |
69 | if (((page->index + 1) << PAGE_CACHE_SHIFT) > i_size_read(inode)) { | |
70 | unsigned offset; | |
71 | offset = i_size_read(inode) & ~PAGE_CACHE_MASK; | |
72 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
73 | } | |
74 | set_page_dirty(page); | |
75 | SetPageUptodate(page); | |
76 | ||
e943a10d | 77 | trace_f2fs_vm_page_mkwrite(page, DATA); |
9851e6e1 NJ |
78 | mapped: |
79 | /* fill the page */ | |
3cb5ad15 | 80 | f2fs_wait_on_page_writeback(page, DATA); |
fbfa2cc5 JK |
81 | out: |
82 | sb_end_pagefault(inode->i_sb); | |
83 | return block_page_mkwrite_return(err); | |
84 | } | |
85 | ||
86 | static const struct vm_operations_struct f2fs_file_vm_ops = { | |
692bb55d | 87 | .fault = filemap_fault, |
f1820361 | 88 | .map_pages = filemap_map_pages, |
692bb55d JK |
89 | .page_mkwrite = f2fs_vm_page_mkwrite, |
90 | .remap_pages = generic_file_remap_pages, | |
fbfa2cc5 JK |
91 | }; |
92 | ||
354a3399 JK |
93 | static int get_parent_ino(struct inode *inode, nid_t *pino) |
94 | { | |
95 | struct dentry *dentry; | |
96 | ||
97 | inode = igrab(inode); | |
98 | dentry = d_find_any_alias(inode); | |
99 | iput(inode); | |
100 | if (!dentry) | |
101 | return 0; | |
102 | ||
f0947e5c JK |
103 | if (update_dent_inode(inode, &dentry->d_name)) { |
104 | dput(dentry); | |
105 | return 0; | |
106 | } | |
354a3399 | 107 | |
f0947e5c JK |
108 | *pino = parent_ino(dentry); |
109 | dput(dentry); | |
354a3399 JK |
110 | return 1; |
111 | } | |
112 | ||
fbfa2cc5 JK |
113 | int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) |
114 | { | |
115 | struct inode *inode = file->f_mapping->host; | |
d928bfbf | 116 | struct f2fs_inode_info *fi = F2FS_I(inode); |
fbfa2cc5 | 117 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
fbfa2cc5 JK |
118 | int ret = 0; |
119 | bool need_cp = false; | |
120 | struct writeback_control wbc = { | |
c81bf1c8 | 121 | .sync_mode = WB_SYNC_ALL, |
fbfa2cc5 JK |
122 | .nr_to_write = LONG_MAX, |
123 | .for_reclaim = 0, | |
124 | }; | |
125 | ||
6bacf52f | 126 | if (unlikely(f2fs_readonly(inode->i_sb))) |
1fa95b0b NJ |
127 | return 0; |
128 | ||
a2a4a7e4 | 129 | trace_f2fs_sync_file_enter(inode); |
fbfa2cc5 | 130 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
a2a4a7e4 NJ |
131 | if (ret) { |
132 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); | |
fbfa2cc5 | 133 | return ret; |
a2a4a7e4 | 134 | } |
fbfa2cc5 | 135 | |
7d82db83 JK |
136 | /* guarantee free sections for fsync */ |
137 | f2fs_balance_fs(sbi); | |
138 | ||
d928bfbf | 139 | down_read(&fi->i_sem); |
fbfa2cc5 | 140 | |
e5d2385e JK |
141 | /* |
142 | * Both of fdatasync() and fsync() are able to be recovered from | |
143 | * sudden-power-off. | |
144 | */ | |
fbfa2cc5 JK |
145 | if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1) |
146 | need_cp = true; | |
354a3399 | 147 | else if (file_wrong_pino(inode)) |
fbfa2cc5 | 148 | need_cp = true; |
facb0205 | 149 | else if (!space_for_roll_forward(sbi)) |
fbfa2cc5 | 150 | need_cp = true; |
953a3e27 | 151 | else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino)) |
fbfa2cc5 | 152 | need_cp = true; |
d71b5564 | 153 | else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi))) |
e518ff81 | 154 | need_cp = true; |
fbfa2cc5 | 155 | |
d928bfbf JK |
156 | up_read(&fi->i_sem); |
157 | ||
fbfa2cc5 | 158 | if (need_cp) { |
354a3399 JK |
159 | nid_t pino; |
160 | ||
fbfa2cc5 JK |
161 | /* all the dirty node pages should be flushed for POR */ |
162 | ret = f2fs_sync_fs(inode->i_sb, 1); | |
d928bfbf JK |
163 | |
164 | down_write(&fi->i_sem); | |
165 | F2FS_I(inode)->xattr_ver = 0; | |
354a3399 JK |
166 | if (file_wrong_pino(inode) && inode->i_nlink == 1 && |
167 | get_parent_ino(inode, &pino)) { | |
168 | F2FS_I(inode)->i_pino = pino; | |
169 | file_got_pino(inode); | |
d928bfbf | 170 | up_write(&fi->i_sem); |
354a3399 JK |
171 | mark_inode_dirty_sync(inode); |
172 | ret = f2fs_write_inode(inode, NULL); | |
173 | if (ret) | |
174 | goto out; | |
d928bfbf JK |
175 | } else { |
176 | up_write(&fi->i_sem); | |
354a3399 | 177 | } |
fbfa2cc5 | 178 | } else { |
398b1ac5 JK |
179 | /* if there is no written node page, write its inode page */ |
180 | while (!sync_node_pages(sbi, inode->i_ino, &wbc)) { | |
479f40c4 JK |
181 | if (fsync_mark_done(sbi, inode->i_ino)) |
182 | goto out; | |
b3783873 | 183 | mark_inode_dirty_sync(inode); |
398b1ac5 JK |
184 | ret = f2fs_write_inode(inode, NULL); |
185 | if (ret) | |
186 | goto out; | |
187 | } | |
cfe58f9d JK |
188 | ret = wait_on_node_pages_writeback(sbi, inode->i_ino); |
189 | if (ret) | |
190 | goto out; | |
6b4afdd7 | 191 | ret = f2fs_issue_flush(F2FS_SB(inode->i_sb)); |
fbfa2cc5 JK |
192 | } |
193 | out: | |
a2a4a7e4 | 194 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); |
fbfa2cc5 JK |
195 | return ret; |
196 | } | |
197 | ||
7f7670fe JK |
198 | static pgoff_t __get_first_dirty_index(struct address_space *mapping, |
199 | pgoff_t pgofs, int whence) | |
200 | { | |
201 | struct pagevec pvec; | |
202 | int nr_pages; | |
203 | ||
204 | if (whence != SEEK_DATA) | |
205 | return 0; | |
206 | ||
207 | /* find first dirty page index */ | |
208 | pagevec_init(&pvec, 0); | |
209 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs, PAGECACHE_TAG_DIRTY, 1); | |
210 | pgofs = nr_pages ? pvec.pages[0]->index: LONG_MAX; | |
211 | pagevec_release(&pvec); | |
212 | return pgofs; | |
213 | } | |
214 | ||
215 | static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs, | |
216 | int whence) | |
217 | { | |
218 | switch (whence) { | |
219 | case SEEK_DATA: | |
220 | if ((blkaddr == NEW_ADDR && dirty == pgofs) || | |
221 | (blkaddr != NEW_ADDR && blkaddr != NULL_ADDR)) | |
222 | return true; | |
223 | break; | |
224 | case SEEK_HOLE: | |
225 | if (blkaddr == NULL_ADDR) | |
226 | return true; | |
227 | break; | |
228 | } | |
229 | return false; | |
230 | } | |
231 | ||
267378d4 CY |
232 | static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence) |
233 | { | |
234 | struct inode *inode = file->f_mapping->host; | |
235 | loff_t maxbytes = inode->i_sb->s_maxbytes; | |
236 | struct dnode_of_data dn; | |
7f7670fe JK |
237 | pgoff_t pgofs, end_offset, dirty; |
238 | loff_t data_ofs = offset; | |
239 | loff_t isize; | |
267378d4 CY |
240 | int err = 0; |
241 | ||
242 | mutex_lock(&inode->i_mutex); | |
243 | ||
244 | isize = i_size_read(inode); | |
245 | if (offset >= isize) | |
246 | goto fail; | |
247 | ||
248 | /* handle inline data case */ | |
249 | if (f2fs_has_inline_data(inode)) { | |
250 | if (whence == SEEK_HOLE) | |
251 | data_ofs = isize; | |
252 | goto found; | |
253 | } | |
254 | ||
255 | pgofs = (pgoff_t)(offset >> PAGE_CACHE_SHIFT); | |
256 | ||
7f7670fe JK |
257 | dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence); |
258 | ||
267378d4 CY |
259 | for (; data_ofs < isize; data_ofs = pgofs << PAGE_CACHE_SHIFT) { |
260 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
261 | err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE_RA); | |
262 | if (err && err != -ENOENT) { | |
263 | goto fail; | |
264 | } else if (err == -ENOENT) { | |
265 | /* direct node is not exist */ | |
266 | if (whence == SEEK_DATA) { | |
267 | pgofs = PGOFS_OF_NEXT_DNODE(pgofs, | |
268 | F2FS_I(inode)); | |
269 | continue; | |
270 | } else { | |
271 | goto found; | |
272 | } | |
273 | } | |
274 | ||
6b2920a5 | 275 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
267378d4 CY |
276 | |
277 | /* find data/hole in dnode block */ | |
278 | for (; dn.ofs_in_node < end_offset; | |
279 | dn.ofs_in_node++, pgofs++, | |
280 | data_ofs = pgofs << PAGE_CACHE_SHIFT) { | |
281 | block_t blkaddr; | |
282 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
283 | ||
7f7670fe | 284 | if (__found_offset(blkaddr, dirty, pgofs, whence)) { |
267378d4 CY |
285 | f2fs_put_dnode(&dn); |
286 | goto found; | |
287 | } | |
288 | } | |
289 | f2fs_put_dnode(&dn); | |
290 | } | |
291 | ||
292 | if (whence == SEEK_DATA) | |
293 | goto fail; | |
267378d4 | 294 | found: |
fe369bc8 JK |
295 | if (whence == SEEK_HOLE && data_ofs > isize) |
296 | data_ofs = isize; | |
267378d4 CY |
297 | mutex_unlock(&inode->i_mutex); |
298 | return vfs_setpos(file, data_ofs, maxbytes); | |
299 | fail: | |
300 | mutex_unlock(&inode->i_mutex); | |
301 | return -ENXIO; | |
302 | } | |
303 | ||
304 | static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence) | |
305 | { | |
306 | struct inode *inode = file->f_mapping->host; | |
307 | loff_t maxbytes = inode->i_sb->s_maxbytes; | |
308 | ||
309 | switch (whence) { | |
310 | case SEEK_SET: | |
311 | case SEEK_CUR: | |
312 | case SEEK_END: | |
313 | return generic_file_llseek_size(file, offset, whence, | |
314 | maxbytes, i_size_read(inode)); | |
315 | case SEEK_DATA: | |
316 | case SEEK_HOLE: | |
317 | return f2fs_seek_block(file, offset, whence); | |
318 | } | |
319 | ||
320 | return -EINVAL; | |
321 | } | |
322 | ||
fbfa2cc5 JK |
323 | static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma) |
324 | { | |
325 | file_accessed(file); | |
326 | vma->vm_ops = &f2fs_file_vm_ops; | |
327 | return 0; | |
328 | } | |
329 | ||
b292dcab | 330 | int truncate_data_blocks_range(struct dnode_of_data *dn, int count) |
fbfa2cc5 JK |
331 | { |
332 | int nr_free = 0, ofs = dn->ofs_in_node; | |
333 | struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); | |
334 | struct f2fs_node *raw_node; | |
335 | __le32 *addr; | |
336 | ||
45590710 | 337 | raw_node = F2FS_NODE(dn->node_page); |
fbfa2cc5 JK |
338 | addr = blkaddr_in_node(raw_node) + ofs; |
339 | ||
6c311ec6 | 340 | for (; count > 0; count--, addr++, dn->ofs_in_node++) { |
fbfa2cc5 JK |
341 | block_t blkaddr = le32_to_cpu(*addr); |
342 | if (blkaddr == NULL_ADDR) | |
343 | continue; | |
344 | ||
345 | update_extent_cache(NULL_ADDR, dn); | |
346 | invalidate_blocks(sbi, blkaddr); | |
fbfa2cc5 JK |
347 | nr_free++; |
348 | } | |
349 | if (nr_free) { | |
d7cc950b | 350 | dec_valid_block_count(sbi, dn->inode, nr_free); |
fbfa2cc5 JK |
351 | set_page_dirty(dn->node_page); |
352 | sync_inode_page(dn); | |
353 | } | |
354 | dn->ofs_in_node = ofs; | |
51dd6249 NJ |
355 | |
356 | trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid, | |
357 | dn->ofs_in_node, nr_free); | |
fbfa2cc5 JK |
358 | return nr_free; |
359 | } | |
360 | ||
361 | void truncate_data_blocks(struct dnode_of_data *dn) | |
362 | { | |
363 | truncate_data_blocks_range(dn, ADDRS_PER_BLOCK); | |
364 | } | |
365 | ||
366 | static void truncate_partial_data_page(struct inode *inode, u64 from) | |
367 | { | |
368 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
369 | struct page *page; | |
370 | ||
8aa6f1c5 CY |
371 | if (f2fs_has_inline_data(inode)) |
372 | return truncate_inline_data(inode, from); | |
373 | ||
fbfa2cc5 JK |
374 | if (!offset) |
375 | return; | |
376 | ||
c718379b | 377 | page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, false); |
fbfa2cc5 JK |
378 | if (IS_ERR(page)) |
379 | return; | |
380 | ||
381 | lock_page(page); | |
ca0a81b3 CY |
382 | if (unlikely(!PageUptodate(page) || |
383 | page->mapping != inode->i_mapping)) | |
384 | goto out; | |
385 | ||
3cb5ad15 | 386 | f2fs_wait_on_page_writeback(page, DATA); |
fbfa2cc5 JK |
387 | zero_user(page, offset, PAGE_CACHE_SIZE - offset); |
388 | set_page_dirty(page); | |
ca0a81b3 CY |
389 | |
390 | out: | |
fbfa2cc5 JK |
391 | f2fs_put_page(page, 1); |
392 | } | |
393 | ||
1e1bb4ba | 394 | int truncate_blocks(struct inode *inode, u64 from) |
fbfa2cc5 JK |
395 | { |
396 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
397 | unsigned int blocksize = inode->i_sb->s_blocksize; | |
398 | struct dnode_of_data dn; | |
399 | pgoff_t free_from; | |
9ffe0fb5 | 400 | int count = 0, err = 0; |
fbfa2cc5 | 401 | |
51dd6249 NJ |
402 | trace_f2fs_truncate_blocks_enter(inode, from); |
403 | ||
f185ff97 JK |
404 | if (f2fs_has_inline_data(inode)) |
405 | goto done; | |
406 | ||
fbfa2cc5 JK |
407 | free_from = (pgoff_t) |
408 | ((from + blocksize - 1) >> (sbi->log_blocksize)); | |
409 | ||
e479556b | 410 | f2fs_lock_op(sbi); |
9ffe0fb5 | 411 | |
fbfa2cc5 | 412 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 413 | err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE); |
fbfa2cc5 JK |
414 | if (err) { |
415 | if (err == -ENOENT) | |
416 | goto free_next; | |
e479556b | 417 | f2fs_unlock_op(sbi); |
51dd6249 | 418 | trace_f2fs_truncate_blocks_exit(inode, err); |
fbfa2cc5 JK |
419 | return err; |
420 | } | |
421 | ||
6403eb1f | 422 | count = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
fbfa2cc5 JK |
423 | |
424 | count -= dn.ofs_in_node; | |
5d56b671 | 425 | f2fs_bug_on(count < 0); |
39936837 | 426 | |
fbfa2cc5 JK |
427 | if (dn.ofs_in_node || IS_INODE(dn.node_page)) { |
428 | truncate_data_blocks_range(&dn, count); | |
429 | free_from += count; | |
430 | } | |
431 | ||
432 | f2fs_put_dnode(&dn); | |
433 | free_next: | |
434 | err = truncate_inode_blocks(inode, free_from); | |
e479556b | 435 | f2fs_unlock_op(sbi); |
f185ff97 | 436 | done: |
fbfa2cc5 JK |
437 | /* lastly zero out the first data page */ |
438 | truncate_partial_data_page(inode, from); | |
439 | ||
51dd6249 | 440 | trace_f2fs_truncate_blocks_exit(inode, err); |
fbfa2cc5 JK |
441 | return err; |
442 | } | |
443 | ||
444 | void f2fs_truncate(struct inode *inode) | |
445 | { | |
446 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
447 | S_ISLNK(inode->i_mode))) | |
448 | return; | |
449 | ||
51dd6249 NJ |
450 | trace_f2fs_truncate(inode); |
451 | ||
fbfa2cc5 JK |
452 | if (!truncate_blocks(inode, i_size_read(inode))) { |
453 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
454 | mark_inode_dirty(inode); | |
455 | } | |
fbfa2cc5 JK |
456 | } |
457 | ||
2d4d9fb5 | 458 | int f2fs_getattr(struct vfsmount *mnt, |
fbfa2cc5 JK |
459 | struct dentry *dentry, struct kstat *stat) |
460 | { | |
461 | struct inode *inode = dentry->d_inode; | |
462 | generic_fillattr(inode, stat); | |
463 | stat->blocks <<= 3; | |
464 | return 0; | |
465 | } | |
466 | ||
467 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
468 | static void __setattr_copy(struct inode *inode, const struct iattr *attr) | |
469 | { | |
470 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
471 | unsigned int ia_valid = attr->ia_valid; | |
472 | ||
473 | if (ia_valid & ATTR_UID) | |
474 | inode->i_uid = attr->ia_uid; | |
475 | if (ia_valid & ATTR_GID) | |
476 | inode->i_gid = attr->ia_gid; | |
477 | if (ia_valid & ATTR_ATIME) | |
478 | inode->i_atime = timespec_trunc(attr->ia_atime, | |
479 | inode->i_sb->s_time_gran); | |
480 | if (ia_valid & ATTR_MTIME) | |
481 | inode->i_mtime = timespec_trunc(attr->ia_mtime, | |
482 | inode->i_sb->s_time_gran); | |
483 | if (ia_valid & ATTR_CTIME) | |
484 | inode->i_ctime = timespec_trunc(attr->ia_ctime, | |
485 | inode->i_sb->s_time_gran); | |
486 | if (ia_valid & ATTR_MODE) { | |
487 | umode_t mode = attr->ia_mode; | |
488 | ||
489 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
490 | mode &= ~S_ISGID; | |
491 | set_acl_inode(fi, mode); | |
492 | } | |
493 | } | |
494 | #else | |
495 | #define __setattr_copy setattr_copy | |
496 | #endif | |
497 | ||
498 | int f2fs_setattr(struct dentry *dentry, struct iattr *attr) | |
499 | { | |
500 | struct inode *inode = dentry->d_inode; | |
501 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
502 | int err; | |
503 | ||
504 | err = inode_change_ok(inode, attr); | |
505 | if (err) | |
506 | return err; | |
507 | ||
508 | if ((attr->ia_valid & ATTR_SIZE) && | |
509 | attr->ia_size != i_size_read(inode)) { | |
9e09fc85 JK |
510 | err = f2fs_convert_inline_data(inode, attr->ia_size); |
511 | if (err) | |
512 | return err; | |
9ffe0fb5 | 513 | |
fbfa2cc5 | 514 | truncate_setsize(inode, attr->ia_size); |
9e09fc85 | 515 | f2fs_truncate(inode); |
d4686d56 | 516 | f2fs_balance_fs(F2FS_SB(inode->i_sb)); |
fbfa2cc5 JK |
517 | } |
518 | ||
519 | __setattr_copy(inode, attr); | |
520 | ||
521 | if (attr->ia_valid & ATTR_MODE) { | |
a6dda0e6 | 522 | err = posix_acl_chmod(inode, get_inode_mode(inode)); |
fbfa2cc5 JK |
523 | if (err || is_inode_flag_set(fi, FI_ACL_MODE)) { |
524 | inode->i_mode = fi->i_acl_mode; | |
525 | clear_inode_flag(fi, FI_ACL_MODE); | |
526 | } | |
527 | } | |
528 | ||
529 | mark_inode_dirty(inode); | |
530 | return err; | |
531 | } | |
532 | ||
533 | const struct inode_operations f2fs_file_inode_operations = { | |
534 | .getattr = f2fs_getattr, | |
535 | .setattr = f2fs_setattr, | |
536 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 537 | .set_acl = f2fs_set_acl, |
fbfa2cc5 JK |
538 | #ifdef CONFIG_F2FS_FS_XATTR |
539 | .setxattr = generic_setxattr, | |
540 | .getxattr = generic_getxattr, | |
541 | .listxattr = f2fs_listxattr, | |
542 | .removexattr = generic_removexattr, | |
543 | #endif | |
9ab70134 | 544 | .fiemap = f2fs_fiemap, |
fbfa2cc5 JK |
545 | }; |
546 | ||
547 | static void fill_zero(struct inode *inode, pgoff_t index, | |
548 | loff_t start, loff_t len) | |
549 | { | |
bd43df02 | 550 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
fbfa2cc5 JK |
551 | struct page *page; |
552 | ||
553 | if (!len) | |
554 | return; | |
555 | ||
bd43df02 JK |
556 | f2fs_balance_fs(sbi); |
557 | ||
e479556b | 558 | f2fs_lock_op(sbi); |
64aa7ed9 | 559 | page = get_new_data_page(inode, NULL, index, false); |
e479556b | 560 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
561 | |
562 | if (!IS_ERR(page)) { | |
3cb5ad15 | 563 | f2fs_wait_on_page_writeback(page, DATA); |
fbfa2cc5 JK |
564 | zero_user(page, start, len); |
565 | set_page_dirty(page); | |
566 | f2fs_put_page(page, 1); | |
567 | } | |
568 | } | |
569 | ||
570 | int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) | |
571 | { | |
572 | pgoff_t index; | |
573 | int err; | |
574 | ||
575 | for (index = pg_start; index < pg_end; index++) { | |
576 | struct dnode_of_data dn; | |
9eaeba70 | 577 | |
fbfa2cc5 | 578 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 579 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
fbfa2cc5 | 580 | if (err) { |
fbfa2cc5 JK |
581 | if (err == -ENOENT) |
582 | continue; | |
583 | return err; | |
584 | } | |
585 | ||
586 | if (dn.data_blkaddr != NULL_ADDR) | |
587 | truncate_data_blocks_range(&dn, 1); | |
588 | f2fs_put_dnode(&dn); | |
fbfa2cc5 JK |
589 | } |
590 | return 0; | |
591 | } | |
592 | ||
a66c7b2f | 593 | static int punch_hole(struct inode *inode, loff_t offset, loff_t len) |
fbfa2cc5 JK |
594 | { |
595 | pgoff_t pg_start, pg_end; | |
596 | loff_t off_start, off_end; | |
597 | int ret = 0; | |
598 | ||
9e09fc85 | 599 | ret = f2fs_convert_inline_data(inode, MAX_INLINE_DATA + 1); |
8230a0a4 JK |
600 | if (ret) |
601 | return ret; | |
9ffe0fb5 | 602 | |
fbfa2cc5 JK |
603 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; |
604 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
605 | ||
606 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
607 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
608 | ||
609 | if (pg_start == pg_end) { | |
610 | fill_zero(inode, pg_start, off_start, | |
611 | off_end - off_start); | |
612 | } else { | |
613 | if (off_start) | |
614 | fill_zero(inode, pg_start++, off_start, | |
615 | PAGE_CACHE_SIZE - off_start); | |
616 | if (off_end) | |
617 | fill_zero(inode, pg_end, 0, off_end); | |
618 | ||
619 | if (pg_start < pg_end) { | |
620 | struct address_space *mapping = inode->i_mapping; | |
621 | loff_t blk_start, blk_end; | |
1127a3d4 JH |
622 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
623 | ||
624 | f2fs_balance_fs(sbi); | |
fbfa2cc5 JK |
625 | |
626 | blk_start = pg_start << PAGE_CACHE_SHIFT; | |
627 | blk_end = pg_end << PAGE_CACHE_SHIFT; | |
628 | truncate_inode_pages_range(mapping, blk_start, | |
629 | blk_end - 1); | |
39936837 | 630 | |
e479556b | 631 | f2fs_lock_op(sbi); |
fbfa2cc5 | 632 | ret = truncate_hole(inode, pg_start, pg_end); |
e479556b | 633 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
634 | } |
635 | } | |
636 | ||
fbfa2cc5 JK |
637 | return ret; |
638 | } | |
639 | ||
640 | static int expand_inode_data(struct inode *inode, loff_t offset, | |
641 | loff_t len, int mode) | |
642 | { | |
643 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
644 | pgoff_t index, pg_start, pg_end; | |
645 | loff_t new_size = i_size_read(inode); | |
646 | loff_t off_start, off_end; | |
647 | int ret = 0; | |
648 | ||
649 | ret = inode_newsize_ok(inode, (len + offset)); | |
650 | if (ret) | |
651 | return ret; | |
652 | ||
9e09fc85 JK |
653 | ret = f2fs_convert_inline_data(inode, offset + len); |
654 | if (ret) | |
655 | return ret; | |
656 | ||
fbfa2cc5 JK |
657 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; |
658 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
659 | ||
660 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
661 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
662 | ||
ead43275 JK |
663 | f2fs_lock_op(sbi); |
664 | ||
fbfa2cc5 JK |
665 | for (index = pg_start; index <= pg_end; index++) { |
666 | struct dnode_of_data dn; | |
667 | ||
98397ff3 JK |
668 | if (index == pg_end && !off_end) |
669 | goto noalloc; | |
670 | ||
fbfa2cc5 | 671 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
b600965c | 672 | ret = f2fs_reserve_block(&dn, index); |
b600965c | 673 | if (ret) |
fbfa2cc5 | 674 | break; |
98397ff3 | 675 | noalloc: |
fbfa2cc5 JK |
676 | if (pg_start == pg_end) |
677 | new_size = offset + len; | |
678 | else if (index == pg_start && off_start) | |
679 | new_size = (index + 1) << PAGE_CACHE_SHIFT; | |
680 | else if (index == pg_end) | |
681 | new_size = (index << PAGE_CACHE_SHIFT) + off_end; | |
682 | else | |
683 | new_size += PAGE_CACHE_SIZE; | |
684 | } | |
685 | ||
686 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
687 | i_size_read(inode) < new_size) { | |
688 | i_size_write(inode, new_size); | |
689 | mark_inode_dirty(inode); | |
ead43275 | 690 | update_inode_page(inode); |
fbfa2cc5 | 691 | } |
ead43275 | 692 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
693 | |
694 | return ret; | |
695 | } | |
696 | ||
697 | static long f2fs_fallocate(struct file *file, int mode, | |
698 | loff_t offset, loff_t len) | |
699 | { | |
6131ffaa | 700 | struct inode *inode = file_inode(file); |
fbfa2cc5 JK |
701 | long ret; |
702 | ||
703 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) | |
704 | return -EOPNOTSUPP; | |
705 | ||
3375f696 CY |
706 | mutex_lock(&inode->i_mutex); |
707 | ||
fbfa2cc5 | 708 | if (mode & FALLOC_FL_PUNCH_HOLE) |
a66c7b2f | 709 | ret = punch_hole(inode, offset, len); |
fbfa2cc5 JK |
710 | else |
711 | ret = expand_inode_data(inode, offset, len, mode); | |
712 | ||
3af60a49 NJ |
713 | if (!ret) { |
714 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
715 | mark_inode_dirty(inode); | |
716 | } | |
3375f696 CY |
717 | |
718 | mutex_unlock(&inode->i_mutex); | |
719 | ||
c01e2853 | 720 | trace_f2fs_fallocate(inode, mode, offset, len, ret); |
fbfa2cc5 JK |
721 | return ret; |
722 | } | |
723 | ||
724 | #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL)) | |
725 | #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL) | |
726 | ||
727 | static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags) | |
728 | { | |
729 | if (S_ISDIR(mode)) | |
730 | return flags; | |
731 | else if (S_ISREG(mode)) | |
732 | return flags & F2FS_REG_FLMASK; | |
733 | else | |
734 | return flags & F2FS_OTHER_FLMASK; | |
735 | } | |
736 | ||
737 | long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
738 | { | |
6131ffaa | 739 | struct inode *inode = file_inode(filp); |
fbfa2cc5 JK |
740 | struct f2fs_inode_info *fi = F2FS_I(inode); |
741 | unsigned int flags; | |
742 | int ret; | |
743 | ||
744 | switch (cmd) { | |
6a3e8ef0 | 745 | case F2FS_IOC_GETFLAGS: |
fbfa2cc5 JK |
746 | flags = fi->i_flags & FS_FL_USER_VISIBLE; |
747 | return put_user(flags, (int __user *) arg); | |
6a3e8ef0 | 748 | case F2FS_IOC_SETFLAGS: |
fbfa2cc5 JK |
749 | { |
750 | unsigned int oldflags; | |
751 | ||
bdaec334 | 752 | ret = mnt_want_write_file(filp); |
fbfa2cc5 JK |
753 | if (ret) |
754 | return ret; | |
755 | ||
756 | if (!inode_owner_or_capable(inode)) { | |
757 | ret = -EACCES; | |
758 | goto out; | |
759 | } | |
760 | ||
761 | if (get_user(flags, (int __user *) arg)) { | |
762 | ret = -EFAULT; | |
763 | goto out; | |
764 | } | |
765 | ||
766 | flags = f2fs_mask_flags(inode->i_mode, flags); | |
767 | ||
768 | mutex_lock(&inode->i_mutex); | |
769 | ||
770 | oldflags = fi->i_flags; | |
771 | ||
772 | if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { | |
773 | if (!capable(CAP_LINUX_IMMUTABLE)) { | |
774 | mutex_unlock(&inode->i_mutex); | |
775 | ret = -EPERM; | |
776 | goto out; | |
777 | } | |
778 | } | |
779 | ||
780 | flags = flags & FS_FL_USER_MODIFIABLE; | |
781 | flags |= oldflags & ~FS_FL_USER_MODIFIABLE; | |
782 | fi->i_flags = flags; | |
783 | mutex_unlock(&inode->i_mutex); | |
784 | ||
785 | f2fs_set_inode_flags(inode); | |
786 | inode->i_ctime = CURRENT_TIME; | |
787 | mark_inode_dirty(inode); | |
788 | out: | |
bdaec334 | 789 | mnt_drop_write_file(filp); |
fbfa2cc5 JK |
790 | return ret; |
791 | } | |
792 | default: | |
793 | return -ENOTTY; | |
794 | } | |
795 | } | |
796 | ||
e9750824 NJ |
797 | #ifdef CONFIG_COMPAT |
798 | long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
799 | { | |
800 | switch (cmd) { | |
801 | case F2FS_IOC32_GETFLAGS: | |
802 | cmd = F2FS_IOC_GETFLAGS; | |
803 | break; | |
804 | case F2FS_IOC32_SETFLAGS: | |
805 | cmd = F2FS_IOC_SETFLAGS; | |
806 | break; | |
807 | default: | |
808 | return -ENOIOCTLCMD; | |
809 | } | |
810 | return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); | |
811 | } | |
812 | #endif | |
813 | ||
fbfa2cc5 | 814 | const struct file_operations f2fs_file_operations = { |
267378d4 | 815 | .llseek = f2fs_llseek, |
aad4f8bb | 816 | .read = new_sync_read, |
8174202b | 817 | .write = new_sync_write, |
aad4f8bb | 818 | .read_iter = generic_file_read_iter, |
8174202b | 819 | .write_iter = generic_file_write_iter, |
fbfa2cc5 JK |
820 | .open = generic_file_open, |
821 | .mmap = f2fs_file_mmap, | |
822 | .fsync = f2fs_sync_file, | |
823 | .fallocate = f2fs_fallocate, | |
824 | .unlocked_ioctl = f2fs_ioctl, | |
e9750824 NJ |
825 | #ifdef CONFIG_COMPAT |
826 | .compat_ioctl = f2fs_compat_ioctl, | |
827 | #endif | |
fbfa2cc5 | 828 | .splice_read = generic_file_splice_read, |
8d020765 | 829 | .splice_write = iter_file_splice_write, |
fbfa2cc5 | 830 | }; |