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> | |
16 | #include <linux/falloc.h> | |
17 | #include <linux/types.h> | |
e9750824 | 18 | #include <linux/compat.h> |
fbfa2cc5 JK |
19 | #include <linux/uaccess.h> |
20 | #include <linux/mount.h> | |
21 | ||
22 | #include "f2fs.h" | |
23 | #include "node.h" | |
24 | #include "segment.h" | |
25 | #include "xattr.h" | |
26 | #include "acl.h" | |
27 | ||
28 | static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma, | |
29 | struct vm_fault *vmf) | |
30 | { | |
31 | struct page *page = vmf->page; | |
6131ffaa | 32 | struct inode *inode = file_inode(vma->vm_file); |
fbfa2cc5 | 33 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
fbfa2cc5 JK |
34 | block_t old_blk_addr; |
35 | struct dnode_of_data dn; | |
36 | int err; | |
37 | ||
38 | f2fs_balance_fs(sbi); | |
39 | ||
40 | sb_start_pagefault(inode->i_sb); | |
41 | ||
42 | mutex_lock_op(sbi, DATA_NEW); | |
43 | ||
44 | /* block allocation */ | |
45 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 46 | err = get_dnode_of_data(&dn, page->index, ALLOC_NODE); |
fbfa2cc5 JK |
47 | if (err) { |
48 | mutex_unlock_op(sbi, DATA_NEW); | |
49 | goto out; | |
50 | } | |
51 | ||
52 | old_blk_addr = dn.data_blkaddr; | |
fbfa2cc5 JK |
53 | |
54 | if (old_blk_addr == NULL_ADDR) { | |
55 | err = reserve_new_block(&dn); | |
56 | if (err) { | |
57 | f2fs_put_dnode(&dn); | |
58 | mutex_unlock_op(sbi, DATA_NEW); | |
59 | goto out; | |
60 | } | |
61 | } | |
62 | f2fs_put_dnode(&dn); | |
63 | ||
64 | mutex_unlock_op(sbi, DATA_NEW); | |
65 | ||
66 | lock_page(page); | |
67 | if (page->mapping != inode->i_mapping || | |
68 | page_offset(page) >= i_size_read(inode) || | |
69 | !PageUptodate(page)) { | |
70 | unlock_page(page); | |
71 | err = -EFAULT; | |
72 | goto out; | |
73 | } | |
74 | ||
75 | /* | |
76 | * check to see if the page is mapped already (no holes) | |
77 | */ | |
78 | if (PageMappedToDisk(page)) | |
79 | goto out; | |
80 | ||
81 | /* fill the page */ | |
82 | wait_on_page_writeback(page); | |
83 | ||
84 | /* page is wholly or partially inside EOF */ | |
85 | if (((page->index + 1) << PAGE_CACHE_SHIFT) > i_size_read(inode)) { | |
86 | unsigned offset; | |
87 | offset = i_size_read(inode) & ~PAGE_CACHE_MASK; | |
88 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
89 | } | |
90 | set_page_dirty(page); | |
91 | SetPageUptodate(page); | |
92 | ||
93 | file_update_time(vma->vm_file); | |
94 | out: | |
95 | sb_end_pagefault(inode->i_sb); | |
96 | return block_page_mkwrite_return(err); | |
97 | } | |
98 | ||
99 | static const struct vm_operations_struct f2fs_file_vm_ops = { | |
692bb55d JK |
100 | .fault = filemap_fault, |
101 | .page_mkwrite = f2fs_vm_page_mkwrite, | |
102 | .remap_pages = generic_file_remap_pages, | |
fbfa2cc5 JK |
103 | }; |
104 | ||
105 | static int need_to_sync_dir(struct f2fs_sb_info *sbi, struct inode *inode) | |
106 | { | |
107 | struct dentry *dentry; | |
108 | nid_t pino; | |
109 | ||
110 | inode = igrab(inode); | |
111 | dentry = d_find_any_alias(inode); | |
112 | if (!dentry) { | |
113 | iput(inode); | |
114 | return 0; | |
115 | } | |
116 | pino = dentry->d_parent->d_inode->i_ino; | |
117 | dput(dentry); | |
118 | iput(inode); | |
119 | return !is_checkpointed_node(sbi, pino); | |
120 | } | |
121 | ||
122 | int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) | |
123 | { | |
124 | struct inode *inode = file->f_mapping->host; | |
125 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
126 | unsigned long long cur_version; | |
127 | int ret = 0; | |
128 | bool need_cp = false; | |
129 | struct writeback_control wbc = { | |
130 | .sync_mode = WB_SYNC_ALL, | |
131 | .nr_to_write = LONG_MAX, | |
132 | .for_reclaim = 0, | |
133 | }; | |
134 | ||
1fa95b0b NJ |
135 | if (inode->i_sb->s_flags & MS_RDONLY) |
136 | return 0; | |
137 | ||
fbfa2cc5 JK |
138 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
139 | if (ret) | |
140 | return ret; | |
141 | ||
7d82db83 JK |
142 | /* guarantee free sections for fsync */ |
143 | f2fs_balance_fs(sbi); | |
144 | ||
fbfa2cc5 JK |
145 | mutex_lock(&inode->i_mutex); |
146 | ||
fbfa2cc5 JK |
147 | if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) |
148 | goto out; | |
149 | ||
150 | mutex_lock(&sbi->cp_mutex); | |
151 | cur_version = le64_to_cpu(F2FS_CKPT(sbi)->checkpoint_ver); | |
152 | mutex_unlock(&sbi->cp_mutex); | |
153 | ||
154 | if (F2FS_I(inode)->data_version != cur_version && | |
155 | !(inode->i_state & I_DIRTY)) | |
156 | goto out; | |
157 | F2FS_I(inode)->data_version--; | |
158 | ||
159 | if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1) | |
160 | need_cp = true; | |
facb0205 | 161 | else if (is_inode_flag_set(F2FS_I(inode), FI_NEED_CP)) |
fbfa2cc5 | 162 | need_cp = true; |
facb0205 | 163 | else if (!space_for_roll_forward(sbi)) |
fbfa2cc5 | 164 | need_cp = true; |
facb0205 | 165 | else if (need_to_sync_dir(sbi, inode)) |
fbfa2cc5 JK |
166 | need_cp = true; |
167 | ||
fbfa2cc5 JK |
168 | if (need_cp) { |
169 | /* all the dirty node pages should be flushed for POR */ | |
170 | ret = f2fs_sync_fs(inode->i_sb, 1); | |
171 | clear_inode_flag(F2FS_I(inode), FI_NEED_CP); | |
172 | } else { | |
398b1ac5 JK |
173 | /* if there is no written node page, write its inode page */ |
174 | while (!sync_node_pages(sbi, inode->i_ino, &wbc)) { | |
175 | ret = f2fs_write_inode(inode, NULL); | |
176 | if (ret) | |
177 | goto out; | |
178 | } | |
fbfa2cc5 JK |
179 | filemap_fdatawait_range(sbi->node_inode->i_mapping, |
180 | 0, LONG_MAX); | |
181 | } | |
182 | out: | |
183 | mutex_unlock(&inode->i_mutex); | |
184 | return ret; | |
185 | } | |
186 | ||
187 | static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma) | |
188 | { | |
189 | file_accessed(file); | |
190 | vma->vm_ops = &f2fs_file_vm_ops; | |
191 | return 0; | |
192 | } | |
193 | ||
194 | static int truncate_data_blocks_range(struct dnode_of_data *dn, int count) | |
195 | { | |
196 | int nr_free = 0, ofs = dn->ofs_in_node; | |
197 | struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); | |
198 | struct f2fs_node *raw_node; | |
199 | __le32 *addr; | |
200 | ||
201 | raw_node = page_address(dn->node_page); | |
202 | addr = blkaddr_in_node(raw_node) + ofs; | |
203 | ||
204 | for ( ; count > 0; count--, addr++, dn->ofs_in_node++) { | |
205 | block_t blkaddr = le32_to_cpu(*addr); | |
206 | if (blkaddr == NULL_ADDR) | |
207 | continue; | |
208 | ||
209 | update_extent_cache(NULL_ADDR, dn); | |
210 | invalidate_blocks(sbi, blkaddr); | |
211 | dec_valid_block_count(sbi, dn->inode, 1); | |
212 | nr_free++; | |
213 | } | |
214 | if (nr_free) { | |
215 | set_page_dirty(dn->node_page); | |
216 | sync_inode_page(dn); | |
217 | } | |
218 | dn->ofs_in_node = ofs; | |
219 | return nr_free; | |
220 | } | |
221 | ||
222 | void truncate_data_blocks(struct dnode_of_data *dn) | |
223 | { | |
224 | truncate_data_blocks_range(dn, ADDRS_PER_BLOCK); | |
225 | } | |
226 | ||
227 | static void truncate_partial_data_page(struct inode *inode, u64 from) | |
228 | { | |
229 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
230 | struct page *page; | |
231 | ||
232 | if (!offset) | |
233 | return; | |
234 | ||
235 | page = find_data_page(inode, from >> PAGE_CACHE_SHIFT); | |
236 | if (IS_ERR(page)) | |
237 | return; | |
238 | ||
239 | lock_page(page); | |
240 | wait_on_page_writeback(page); | |
241 | zero_user(page, offset, PAGE_CACHE_SIZE - offset); | |
242 | set_page_dirty(page); | |
243 | f2fs_put_page(page, 1); | |
244 | } | |
245 | ||
246 | static int truncate_blocks(struct inode *inode, u64 from) | |
247 | { | |
248 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
249 | unsigned int blocksize = inode->i_sb->s_blocksize; | |
250 | struct dnode_of_data dn; | |
251 | pgoff_t free_from; | |
252 | int count = 0; | |
253 | int err; | |
254 | ||
255 | free_from = (pgoff_t) | |
256 | ((from + blocksize - 1) >> (sbi->log_blocksize)); | |
257 | ||
258 | mutex_lock_op(sbi, DATA_TRUNC); | |
259 | ||
260 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 261 | err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE); |
fbfa2cc5 JK |
262 | if (err) { |
263 | if (err == -ENOENT) | |
264 | goto free_next; | |
265 | mutex_unlock_op(sbi, DATA_TRUNC); | |
266 | return err; | |
267 | } | |
268 | ||
269 | if (IS_INODE(dn.node_page)) | |
270 | count = ADDRS_PER_INODE; | |
271 | else | |
272 | count = ADDRS_PER_BLOCK; | |
273 | ||
274 | count -= dn.ofs_in_node; | |
275 | BUG_ON(count < 0); | |
276 | if (dn.ofs_in_node || IS_INODE(dn.node_page)) { | |
277 | truncate_data_blocks_range(&dn, count); | |
278 | free_from += count; | |
279 | } | |
280 | ||
281 | f2fs_put_dnode(&dn); | |
282 | free_next: | |
283 | err = truncate_inode_blocks(inode, free_from); | |
284 | mutex_unlock_op(sbi, DATA_TRUNC); | |
285 | ||
286 | /* lastly zero out the first data page */ | |
287 | truncate_partial_data_page(inode, from); | |
288 | ||
289 | return err; | |
290 | } | |
291 | ||
292 | void f2fs_truncate(struct inode *inode) | |
293 | { | |
294 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
295 | S_ISLNK(inode->i_mode))) | |
296 | return; | |
297 | ||
298 | if (!truncate_blocks(inode, i_size_read(inode))) { | |
299 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
300 | mark_inode_dirty(inode); | |
301 | } | |
fbfa2cc5 JK |
302 | } |
303 | ||
304 | static int f2fs_getattr(struct vfsmount *mnt, | |
305 | struct dentry *dentry, struct kstat *stat) | |
306 | { | |
307 | struct inode *inode = dentry->d_inode; | |
308 | generic_fillattr(inode, stat); | |
309 | stat->blocks <<= 3; | |
310 | return 0; | |
311 | } | |
312 | ||
313 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
314 | static void __setattr_copy(struct inode *inode, const struct iattr *attr) | |
315 | { | |
316 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
317 | unsigned int ia_valid = attr->ia_valid; | |
318 | ||
319 | if (ia_valid & ATTR_UID) | |
320 | inode->i_uid = attr->ia_uid; | |
321 | if (ia_valid & ATTR_GID) | |
322 | inode->i_gid = attr->ia_gid; | |
323 | if (ia_valid & ATTR_ATIME) | |
324 | inode->i_atime = timespec_trunc(attr->ia_atime, | |
325 | inode->i_sb->s_time_gran); | |
326 | if (ia_valid & ATTR_MTIME) | |
327 | inode->i_mtime = timespec_trunc(attr->ia_mtime, | |
328 | inode->i_sb->s_time_gran); | |
329 | if (ia_valid & ATTR_CTIME) | |
330 | inode->i_ctime = timespec_trunc(attr->ia_ctime, | |
331 | inode->i_sb->s_time_gran); | |
332 | if (ia_valid & ATTR_MODE) { | |
333 | umode_t mode = attr->ia_mode; | |
334 | ||
335 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
336 | mode &= ~S_ISGID; | |
337 | set_acl_inode(fi, mode); | |
338 | } | |
339 | } | |
340 | #else | |
341 | #define __setattr_copy setattr_copy | |
342 | #endif | |
343 | ||
344 | int f2fs_setattr(struct dentry *dentry, struct iattr *attr) | |
345 | { | |
346 | struct inode *inode = dentry->d_inode; | |
347 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
348 | int err; | |
349 | ||
350 | err = inode_change_ok(inode, attr); | |
351 | if (err) | |
352 | return err; | |
353 | ||
354 | if ((attr->ia_valid & ATTR_SIZE) && | |
355 | attr->ia_size != i_size_read(inode)) { | |
356 | truncate_setsize(inode, attr->ia_size); | |
357 | f2fs_truncate(inode); | |
d4686d56 | 358 | f2fs_balance_fs(F2FS_SB(inode->i_sb)); |
fbfa2cc5 JK |
359 | } |
360 | ||
361 | __setattr_copy(inode, attr); | |
362 | ||
363 | if (attr->ia_valid & ATTR_MODE) { | |
364 | err = f2fs_acl_chmod(inode); | |
365 | if (err || is_inode_flag_set(fi, FI_ACL_MODE)) { | |
366 | inode->i_mode = fi->i_acl_mode; | |
367 | clear_inode_flag(fi, FI_ACL_MODE); | |
368 | } | |
369 | } | |
370 | ||
371 | mark_inode_dirty(inode); | |
372 | return err; | |
373 | } | |
374 | ||
375 | const struct inode_operations f2fs_file_inode_operations = { | |
376 | .getattr = f2fs_getattr, | |
377 | .setattr = f2fs_setattr, | |
378 | .get_acl = f2fs_get_acl, | |
379 | #ifdef CONFIG_F2FS_FS_XATTR | |
380 | .setxattr = generic_setxattr, | |
381 | .getxattr = generic_getxattr, | |
382 | .listxattr = f2fs_listxattr, | |
383 | .removexattr = generic_removexattr, | |
384 | #endif | |
385 | }; | |
386 | ||
387 | static void fill_zero(struct inode *inode, pgoff_t index, | |
388 | loff_t start, loff_t len) | |
389 | { | |
bd43df02 | 390 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
fbfa2cc5 JK |
391 | struct page *page; |
392 | ||
393 | if (!len) | |
394 | return; | |
395 | ||
bd43df02 JK |
396 | f2fs_balance_fs(sbi); |
397 | ||
398 | mutex_lock_op(sbi, DATA_NEW); | |
fbfa2cc5 | 399 | page = get_new_data_page(inode, index, false); |
bd43df02 | 400 | mutex_unlock_op(sbi, DATA_NEW); |
fbfa2cc5 JK |
401 | |
402 | if (!IS_ERR(page)) { | |
403 | wait_on_page_writeback(page); | |
404 | zero_user(page, start, len); | |
405 | set_page_dirty(page); | |
406 | f2fs_put_page(page, 1); | |
407 | } | |
408 | } | |
409 | ||
410 | int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) | |
411 | { | |
412 | pgoff_t index; | |
413 | int err; | |
414 | ||
415 | for (index = pg_start; index < pg_end; index++) { | |
416 | struct dnode_of_data dn; | |
417 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
418 | ||
9eaeba70 JK |
419 | f2fs_balance_fs(sbi); |
420 | ||
fbfa2cc5 JK |
421 | mutex_lock_op(sbi, DATA_TRUNC); |
422 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 423 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
fbfa2cc5 JK |
424 | if (err) { |
425 | mutex_unlock_op(sbi, DATA_TRUNC); | |
426 | if (err == -ENOENT) | |
427 | continue; | |
428 | return err; | |
429 | } | |
430 | ||
431 | if (dn.data_blkaddr != NULL_ADDR) | |
432 | truncate_data_blocks_range(&dn, 1); | |
433 | f2fs_put_dnode(&dn); | |
434 | mutex_unlock_op(sbi, DATA_TRUNC); | |
435 | } | |
436 | return 0; | |
437 | } | |
438 | ||
439 | static int punch_hole(struct inode *inode, loff_t offset, loff_t len, int mode) | |
440 | { | |
441 | pgoff_t pg_start, pg_end; | |
442 | loff_t off_start, off_end; | |
443 | int ret = 0; | |
444 | ||
445 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; | |
446 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
447 | ||
448 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
449 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
450 | ||
451 | if (pg_start == pg_end) { | |
452 | fill_zero(inode, pg_start, off_start, | |
453 | off_end - off_start); | |
454 | } else { | |
455 | if (off_start) | |
456 | fill_zero(inode, pg_start++, off_start, | |
457 | PAGE_CACHE_SIZE - off_start); | |
458 | if (off_end) | |
459 | fill_zero(inode, pg_end, 0, off_end); | |
460 | ||
461 | if (pg_start < pg_end) { | |
462 | struct address_space *mapping = inode->i_mapping; | |
463 | loff_t blk_start, blk_end; | |
464 | ||
465 | blk_start = pg_start << PAGE_CACHE_SHIFT; | |
466 | blk_end = pg_end << PAGE_CACHE_SHIFT; | |
467 | truncate_inode_pages_range(mapping, blk_start, | |
468 | blk_end - 1); | |
469 | ret = truncate_hole(inode, pg_start, pg_end); | |
470 | } | |
471 | } | |
472 | ||
473 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
474 | i_size_read(inode) <= (offset + len)) { | |
475 | i_size_write(inode, offset); | |
476 | mark_inode_dirty(inode); | |
477 | } | |
478 | ||
479 | return ret; | |
480 | } | |
481 | ||
482 | static int expand_inode_data(struct inode *inode, loff_t offset, | |
483 | loff_t len, int mode) | |
484 | { | |
485 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
486 | pgoff_t index, pg_start, pg_end; | |
487 | loff_t new_size = i_size_read(inode); | |
488 | loff_t off_start, off_end; | |
489 | int ret = 0; | |
490 | ||
491 | ret = inode_newsize_ok(inode, (len + offset)); | |
492 | if (ret) | |
493 | return ret; | |
494 | ||
495 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; | |
496 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
497 | ||
498 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
499 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
500 | ||
501 | for (index = pg_start; index <= pg_end; index++) { | |
502 | struct dnode_of_data dn; | |
503 | ||
504 | mutex_lock_op(sbi, DATA_NEW); | |
505 | ||
506 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 507 | ret = get_dnode_of_data(&dn, index, ALLOC_NODE); |
fbfa2cc5 JK |
508 | if (ret) { |
509 | mutex_unlock_op(sbi, DATA_NEW); | |
510 | break; | |
511 | } | |
512 | ||
513 | if (dn.data_blkaddr == NULL_ADDR) { | |
514 | ret = reserve_new_block(&dn); | |
515 | if (ret) { | |
516 | f2fs_put_dnode(&dn); | |
517 | mutex_unlock_op(sbi, DATA_NEW); | |
518 | break; | |
519 | } | |
520 | } | |
521 | f2fs_put_dnode(&dn); | |
522 | ||
523 | mutex_unlock_op(sbi, DATA_NEW); | |
524 | ||
525 | if (pg_start == pg_end) | |
526 | new_size = offset + len; | |
527 | else if (index == pg_start && off_start) | |
528 | new_size = (index + 1) << PAGE_CACHE_SHIFT; | |
529 | else if (index == pg_end) | |
530 | new_size = (index << PAGE_CACHE_SHIFT) + off_end; | |
531 | else | |
532 | new_size += PAGE_CACHE_SIZE; | |
533 | } | |
534 | ||
535 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
536 | i_size_read(inode) < new_size) { | |
537 | i_size_write(inode, new_size); | |
538 | mark_inode_dirty(inode); | |
539 | } | |
540 | ||
541 | return ret; | |
542 | } | |
543 | ||
544 | static long f2fs_fallocate(struct file *file, int mode, | |
545 | loff_t offset, loff_t len) | |
546 | { | |
6131ffaa | 547 | struct inode *inode = file_inode(file); |
fbfa2cc5 JK |
548 | long ret; |
549 | ||
550 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) | |
551 | return -EOPNOTSUPP; | |
552 | ||
553 | if (mode & FALLOC_FL_PUNCH_HOLE) | |
554 | ret = punch_hole(inode, offset, len, mode); | |
555 | else | |
556 | ret = expand_inode_data(inode, offset, len, mode); | |
557 | ||
3af60a49 NJ |
558 | if (!ret) { |
559 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
560 | mark_inode_dirty(inode); | |
561 | } | |
fbfa2cc5 JK |
562 | return ret; |
563 | } | |
564 | ||
565 | #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL)) | |
566 | #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL) | |
567 | ||
568 | static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags) | |
569 | { | |
570 | if (S_ISDIR(mode)) | |
571 | return flags; | |
572 | else if (S_ISREG(mode)) | |
573 | return flags & F2FS_REG_FLMASK; | |
574 | else | |
575 | return flags & F2FS_OTHER_FLMASK; | |
576 | } | |
577 | ||
578 | long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
579 | { | |
6131ffaa | 580 | struct inode *inode = file_inode(filp); |
fbfa2cc5 JK |
581 | struct f2fs_inode_info *fi = F2FS_I(inode); |
582 | unsigned int flags; | |
583 | int ret; | |
584 | ||
585 | switch (cmd) { | |
586 | case FS_IOC_GETFLAGS: | |
587 | flags = fi->i_flags & FS_FL_USER_VISIBLE; | |
588 | return put_user(flags, (int __user *) arg); | |
589 | case FS_IOC_SETFLAGS: | |
590 | { | |
591 | unsigned int oldflags; | |
592 | ||
593 | ret = mnt_want_write(filp->f_path.mnt); | |
594 | if (ret) | |
595 | return ret; | |
596 | ||
597 | if (!inode_owner_or_capable(inode)) { | |
598 | ret = -EACCES; | |
599 | goto out; | |
600 | } | |
601 | ||
602 | if (get_user(flags, (int __user *) arg)) { | |
603 | ret = -EFAULT; | |
604 | goto out; | |
605 | } | |
606 | ||
607 | flags = f2fs_mask_flags(inode->i_mode, flags); | |
608 | ||
609 | mutex_lock(&inode->i_mutex); | |
610 | ||
611 | oldflags = fi->i_flags; | |
612 | ||
613 | if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { | |
614 | if (!capable(CAP_LINUX_IMMUTABLE)) { | |
615 | mutex_unlock(&inode->i_mutex); | |
616 | ret = -EPERM; | |
617 | goto out; | |
618 | } | |
619 | } | |
620 | ||
621 | flags = flags & FS_FL_USER_MODIFIABLE; | |
622 | flags |= oldflags & ~FS_FL_USER_MODIFIABLE; | |
623 | fi->i_flags = flags; | |
624 | mutex_unlock(&inode->i_mutex); | |
625 | ||
626 | f2fs_set_inode_flags(inode); | |
627 | inode->i_ctime = CURRENT_TIME; | |
628 | mark_inode_dirty(inode); | |
629 | out: | |
630 | mnt_drop_write(filp->f_path.mnt); | |
631 | return ret; | |
632 | } | |
633 | default: | |
634 | return -ENOTTY; | |
635 | } | |
636 | } | |
637 | ||
e9750824 NJ |
638 | #ifdef CONFIG_COMPAT |
639 | long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
640 | { | |
641 | switch (cmd) { | |
642 | case F2FS_IOC32_GETFLAGS: | |
643 | cmd = F2FS_IOC_GETFLAGS; | |
644 | break; | |
645 | case F2FS_IOC32_SETFLAGS: | |
646 | cmd = F2FS_IOC_SETFLAGS; | |
647 | break; | |
648 | default: | |
649 | return -ENOIOCTLCMD; | |
650 | } | |
651 | return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); | |
652 | } | |
653 | #endif | |
654 | ||
fbfa2cc5 JK |
655 | const struct file_operations f2fs_file_operations = { |
656 | .llseek = generic_file_llseek, | |
657 | .read = do_sync_read, | |
658 | .write = do_sync_write, | |
659 | .aio_read = generic_file_aio_read, | |
660 | .aio_write = generic_file_aio_write, | |
661 | .open = generic_file_open, | |
662 | .mmap = f2fs_file_mmap, | |
663 | .fsync = f2fs_sync_file, | |
664 | .fallocate = f2fs_fallocate, | |
665 | .unlocked_ioctl = f2fs_ioctl, | |
e9750824 NJ |
666 | #ifdef CONFIG_COMPAT |
667 | .compat_ioctl = f2fs_compat_ioctl, | |
668 | #endif | |
fbfa2cc5 JK |
669 | .splice_read = generic_file_splice_read, |
670 | .splice_write = generic_file_splice_write, | |
671 | }; |