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> | |
22 | ||
23 | #include "f2fs.h" | |
24 | #include "node.h" | |
25 | #include "segment.h" | |
26 | #include "xattr.h" | |
27 | #include "acl.h" | |
28 | ||
29 | static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma, | |
30 | struct vm_fault *vmf) | |
31 | { | |
32 | struct page *page = vmf->page; | |
6131ffaa | 33 | struct inode *inode = file_inode(vma->vm_file); |
fbfa2cc5 | 34 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
fbfa2cc5 JK |
35 | block_t old_blk_addr; |
36 | struct dnode_of_data dn; | |
37 | int err; | |
38 | ||
39 | f2fs_balance_fs(sbi); | |
40 | ||
41 | sb_start_pagefault(inode->i_sb); | |
42 | ||
43 | mutex_lock_op(sbi, DATA_NEW); | |
44 | ||
45 | /* block allocation */ | |
46 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 47 | err = get_dnode_of_data(&dn, page->index, ALLOC_NODE); |
fbfa2cc5 JK |
48 | if (err) { |
49 | mutex_unlock_op(sbi, DATA_NEW); | |
50 | goto out; | |
51 | } | |
52 | ||
53 | old_blk_addr = dn.data_blkaddr; | |
fbfa2cc5 JK |
54 | |
55 | if (old_blk_addr == NULL_ADDR) { | |
56 | err = reserve_new_block(&dn); | |
57 | if (err) { | |
58 | f2fs_put_dnode(&dn); | |
59 | mutex_unlock_op(sbi, DATA_NEW); | |
60 | goto out; | |
61 | } | |
62 | } | |
63 | f2fs_put_dnode(&dn); | |
64 | ||
65 | mutex_unlock_op(sbi, DATA_NEW); | |
66 | ||
67 | lock_page(page); | |
68 | if (page->mapping != inode->i_mapping || | |
69 | page_offset(page) >= i_size_read(inode) || | |
70 | !PageUptodate(page)) { | |
71 | unlock_page(page); | |
72 | err = -EFAULT; | |
73 | goto out; | |
74 | } | |
75 | ||
76 | /* | |
77 | * check to see if the page is mapped already (no holes) | |
78 | */ | |
79 | if (PageMappedToDisk(page)) | |
80 | goto out; | |
81 | ||
82 | /* fill the page */ | |
83 | wait_on_page_writeback(page); | |
84 | ||
85 | /* page is wholly or partially inside EOF */ | |
86 | if (((page->index + 1) << PAGE_CACHE_SHIFT) > i_size_read(inode)) { | |
87 | unsigned offset; | |
88 | offset = i_size_read(inode) & ~PAGE_CACHE_MASK; | |
89 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
90 | } | |
91 | set_page_dirty(page); | |
92 | SetPageUptodate(page); | |
93 | ||
94 | file_update_time(vma->vm_file); | |
95 | out: | |
96 | sb_end_pagefault(inode->i_sb); | |
97 | return block_page_mkwrite_return(err); | |
98 | } | |
99 | ||
100 | static const struct vm_operations_struct f2fs_file_vm_ops = { | |
692bb55d JK |
101 | .fault = filemap_fault, |
102 | .page_mkwrite = f2fs_vm_page_mkwrite, | |
103 | .remap_pages = generic_file_remap_pages, | |
fbfa2cc5 JK |
104 | }; |
105 | ||
fbfa2cc5 JK |
106 | int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) |
107 | { | |
108 | struct inode *inode = file->f_mapping->host; | |
109 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
fbfa2cc5 JK |
110 | int ret = 0; |
111 | bool need_cp = false; | |
112 | struct writeback_control wbc = { | |
113 | .sync_mode = WB_SYNC_ALL, | |
114 | .nr_to_write = LONG_MAX, | |
115 | .for_reclaim = 0, | |
116 | }; | |
117 | ||
1fa95b0b NJ |
118 | if (inode->i_sb->s_flags & MS_RDONLY) |
119 | return 0; | |
120 | ||
fbfa2cc5 JK |
121 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
122 | if (ret) | |
123 | return ret; | |
124 | ||
7d82db83 JK |
125 | /* guarantee free sections for fsync */ |
126 | f2fs_balance_fs(sbi); | |
127 | ||
fbfa2cc5 JK |
128 | mutex_lock(&inode->i_mutex); |
129 | ||
fbfa2cc5 JK |
130 | if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) |
131 | goto out; | |
132 | ||
fbfa2cc5 JK |
133 | if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1) |
134 | need_cp = true; | |
953a3e27 | 135 | else if (is_cp_file(inode)) |
fbfa2cc5 | 136 | need_cp = true; |
facb0205 | 137 | else if (!space_for_roll_forward(sbi)) |
fbfa2cc5 | 138 | need_cp = true; |
953a3e27 | 139 | else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino)) |
fbfa2cc5 JK |
140 | need_cp = true; |
141 | ||
fbfa2cc5 JK |
142 | if (need_cp) { |
143 | /* all the dirty node pages should be flushed for POR */ | |
144 | ret = f2fs_sync_fs(inode->i_sb, 1); | |
fbfa2cc5 | 145 | } else { |
398b1ac5 JK |
146 | /* if there is no written node page, write its inode page */ |
147 | while (!sync_node_pages(sbi, inode->i_ino, &wbc)) { | |
148 | ret = f2fs_write_inode(inode, NULL); | |
149 | if (ret) | |
150 | goto out; | |
151 | } | |
fbfa2cc5 JK |
152 | filemap_fdatawait_range(sbi->node_inode->i_mapping, |
153 | 0, LONG_MAX); | |
ae51fb31 | 154 | ret = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL); |
fbfa2cc5 JK |
155 | } |
156 | out: | |
157 | mutex_unlock(&inode->i_mutex); | |
158 | return ret; | |
159 | } | |
160 | ||
161 | static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma) | |
162 | { | |
163 | file_accessed(file); | |
164 | vma->vm_ops = &f2fs_file_vm_ops; | |
165 | return 0; | |
166 | } | |
167 | ||
168 | static int truncate_data_blocks_range(struct dnode_of_data *dn, int count) | |
169 | { | |
170 | int nr_free = 0, ofs = dn->ofs_in_node; | |
171 | struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); | |
172 | struct f2fs_node *raw_node; | |
173 | __le32 *addr; | |
174 | ||
175 | raw_node = page_address(dn->node_page); | |
176 | addr = blkaddr_in_node(raw_node) + ofs; | |
177 | ||
178 | for ( ; count > 0; count--, addr++, dn->ofs_in_node++) { | |
179 | block_t blkaddr = le32_to_cpu(*addr); | |
180 | if (blkaddr == NULL_ADDR) | |
181 | continue; | |
182 | ||
183 | update_extent_cache(NULL_ADDR, dn); | |
184 | invalidate_blocks(sbi, blkaddr); | |
185 | dec_valid_block_count(sbi, dn->inode, 1); | |
186 | nr_free++; | |
187 | } | |
188 | if (nr_free) { | |
189 | set_page_dirty(dn->node_page); | |
190 | sync_inode_page(dn); | |
191 | } | |
192 | dn->ofs_in_node = ofs; | |
193 | return nr_free; | |
194 | } | |
195 | ||
196 | void truncate_data_blocks(struct dnode_of_data *dn) | |
197 | { | |
198 | truncate_data_blocks_range(dn, ADDRS_PER_BLOCK); | |
199 | } | |
200 | ||
201 | static void truncate_partial_data_page(struct inode *inode, u64 from) | |
202 | { | |
203 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
204 | struct page *page; | |
205 | ||
206 | if (!offset) | |
207 | return; | |
208 | ||
209 | page = find_data_page(inode, from >> PAGE_CACHE_SHIFT); | |
210 | if (IS_ERR(page)) | |
211 | return; | |
212 | ||
213 | lock_page(page); | |
214 | wait_on_page_writeback(page); | |
215 | zero_user(page, offset, PAGE_CACHE_SIZE - offset); | |
216 | set_page_dirty(page); | |
217 | f2fs_put_page(page, 1); | |
218 | } | |
219 | ||
220 | static int truncate_blocks(struct inode *inode, u64 from) | |
221 | { | |
222 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
223 | unsigned int blocksize = inode->i_sb->s_blocksize; | |
224 | struct dnode_of_data dn; | |
225 | pgoff_t free_from; | |
226 | int count = 0; | |
227 | int err; | |
228 | ||
229 | free_from = (pgoff_t) | |
230 | ((from + blocksize - 1) >> (sbi->log_blocksize)); | |
231 | ||
232 | mutex_lock_op(sbi, DATA_TRUNC); | |
233 | ||
234 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 235 | err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE); |
fbfa2cc5 JK |
236 | if (err) { |
237 | if (err == -ENOENT) | |
238 | goto free_next; | |
239 | mutex_unlock_op(sbi, DATA_TRUNC); | |
240 | return err; | |
241 | } | |
242 | ||
243 | if (IS_INODE(dn.node_page)) | |
244 | count = ADDRS_PER_INODE; | |
245 | else | |
246 | count = ADDRS_PER_BLOCK; | |
247 | ||
248 | count -= dn.ofs_in_node; | |
249 | BUG_ON(count < 0); | |
250 | if (dn.ofs_in_node || IS_INODE(dn.node_page)) { | |
251 | truncate_data_blocks_range(&dn, count); | |
252 | free_from += count; | |
253 | } | |
254 | ||
255 | f2fs_put_dnode(&dn); | |
256 | free_next: | |
257 | err = truncate_inode_blocks(inode, free_from); | |
258 | mutex_unlock_op(sbi, DATA_TRUNC); | |
259 | ||
260 | /* lastly zero out the first data page */ | |
261 | truncate_partial_data_page(inode, from); | |
262 | ||
263 | return err; | |
264 | } | |
265 | ||
266 | void f2fs_truncate(struct inode *inode) | |
267 | { | |
268 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
269 | S_ISLNK(inode->i_mode))) | |
270 | return; | |
271 | ||
272 | if (!truncate_blocks(inode, i_size_read(inode))) { | |
273 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
274 | mark_inode_dirty(inode); | |
275 | } | |
fbfa2cc5 JK |
276 | } |
277 | ||
278 | static int f2fs_getattr(struct vfsmount *mnt, | |
279 | struct dentry *dentry, struct kstat *stat) | |
280 | { | |
281 | struct inode *inode = dentry->d_inode; | |
282 | generic_fillattr(inode, stat); | |
283 | stat->blocks <<= 3; | |
284 | return 0; | |
285 | } | |
286 | ||
287 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
288 | static void __setattr_copy(struct inode *inode, const struct iattr *attr) | |
289 | { | |
290 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
291 | unsigned int ia_valid = attr->ia_valid; | |
292 | ||
293 | if (ia_valid & ATTR_UID) | |
294 | inode->i_uid = attr->ia_uid; | |
295 | if (ia_valid & ATTR_GID) | |
296 | inode->i_gid = attr->ia_gid; | |
297 | if (ia_valid & ATTR_ATIME) | |
298 | inode->i_atime = timespec_trunc(attr->ia_atime, | |
299 | inode->i_sb->s_time_gran); | |
300 | if (ia_valid & ATTR_MTIME) | |
301 | inode->i_mtime = timespec_trunc(attr->ia_mtime, | |
302 | inode->i_sb->s_time_gran); | |
303 | if (ia_valid & ATTR_CTIME) | |
304 | inode->i_ctime = timespec_trunc(attr->ia_ctime, | |
305 | inode->i_sb->s_time_gran); | |
306 | if (ia_valid & ATTR_MODE) { | |
307 | umode_t mode = attr->ia_mode; | |
308 | ||
309 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
310 | mode &= ~S_ISGID; | |
311 | set_acl_inode(fi, mode); | |
312 | } | |
313 | } | |
314 | #else | |
315 | #define __setattr_copy setattr_copy | |
316 | #endif | |
317 | ||
318 | int f2fs_setattr(struct dentry *dentry, struct iattr *attr) | |
319 | { | |
320 | struct inode *inode = dentry->d_inode; | |
321 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
322 | int err; | |
323 | ||
324 | err = inode_change_ok(inode, attr); | |
325 | if (err) | |
326 | return err; | |
327 | ||
328 | if ((attr->ia_valid & ATTR_SIZE) && | |
329 | attr->ia_size != i_size_read(inode)) { | |
330 | truncate_setsize(inode, attr->ia_size); | |
331 | f2fs_truncate(inode); | |
d4686d56 | 332 | f2fs_balance_fs(F2FS_SB(inode->i_sb)); |
fbfa2cc5 JK |
333 | } |
334 | ||
335 | __setattr_copy(inode, attr); | |
336 | ||
337 | if (attr->ia_valid & ATTR_MODE) { | |
338 | err = f2fs_acl_chmod(inode); | |
339 | if (err || is_inode_flag_set(fi, FI_ACL_MODE)) { | |
340 | inode->i_mode = fi->i_acl_mode; | |
341 | clear_inode_flag(fi, FI_ACL_MODE); | |
342 | } | |
343 | } | |
344 | ||
345 | mark_inode_dirty(inode); | |
346 | return err; | |
347 | } | |
348 | ||
349 | const struct inode_operations f2fs_file_inode_operations = { | |
350 | .getattr = f2fs_getattr, | |
351 | .setattr = f2fs_setattr, | |
352 | .get_acl = f2fs_get_acl, | |
353 | #ifdef CONFIG_F2FS_FS_XATTR | |
354 | .setxattr = generic_setxattr, | |
355 | .getxattr = generic_getxattr, | |
356 | .listxattr = f2fs_listxattr, | |
357 | .removexattr = generic_removexattr, | |
358 | #endif | |
359 | }; | |
360 | ||
361 | static void fill_zero(struct inode *inode, pgoff_t index, | |
362 | loff_t start, loff_t len) | |
363 | { | |
bd43df02 | 364 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
fbfa2cc5 JK |
365 | struct page *page; |
366 | ||
367 | if (!len) | |
368 | return; | |
369 | ||
bd43df02 JK |
370 | f2fs_balance_fs(sbi); |
371 | ||
372 | mutex_lock_op(sbi, DATA_NEW); | |
fbfa2cc5 | 373 | page = get_new_data_page(inode, index, false); |
bd43df02 | 374 | mutex_unlock_op(sbi, DATA_NEW); |
fbfa2cc5 JK |
375 | |
376 | if (!IS_ERR(page)) { | |
377 | wait_on_page_writeback(page); | |
378 | zero_user(page, start, len); | |
379 | set_page_dirty(page); | |
380 | f2fs_put_page(page, 1); | |
381 | } | |
382 | } | |
383 | ||
384 | int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) | |
385 | { | |
386 | pgoff_t index; | |
387 | int err; | |
388 | ||
389 | for (index = pg_start; index < pg_end; index++) { | |
390 | struct dnode_of_data dn; | |
391 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
392 | ||
393 | mutex_lock_op(sbi, DATA_TRUNC); | |
394 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 395 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
fbfa2cc5 JK |
396 | if (err) { |
397 | mutex_unlock_op(sbi, DATA_TRUNC); | |
398 | if (err == -ENOENT) | |
399 | continue; | |
400 | return err; | |
401 | } | |
402 | ||
403 | if (dn.data_blkaddr != NULL_ADDR) | |
404 | truncate_data_blocks_range(&dn, 1); | |
405 | f2fs_put_dnode(&dn); | |
406 | mutex_unlock_op(sbi, DATA_TRUNC); | |
407 | } | |
408 | return 0; | |
409 | } | |
410 | ||
411 | static int punch_hole(struct inode *inode, loff_t offset, loff_t len, int mode) | |
412 | { | |
413 | pgoff_t pg_start, pg_end; | |
414 | loff_t off_start, off_end; | |
415 | int ret = 0; | |
416 | ||
417 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; | |
418 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
419 | ||
420 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
421 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
422 | ||
423 | if (pg_start == pg_end) { | |
424 | fill_zero(inode, pg_start, off_start, | |
425 | off_end - off_start); | |
426 | } else { | |
427 | if (off_start) | |
428 | fill_zero(inode, pg_start++, off_start, | |
429 | PAGE_CACHE_SIZE - off_start); | |
430 | if (off_end) | |
431 | fill_zero(inode, pg_end, 0, off_end); | |
432 | ||
433 | if (pg_start < pg_end) { | |
434 | struct address_space *mapping = inode->i_mapping; | |
435 | loff_t blk_start, blk_end; | |
1127a3d4 JH |
436 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
437 | ||
438 | f2fs_balance_fs(sbi); | |
fbfa2cc5 JK |
439 | |
440 | blk_start = pg_start << PAGE_CACHE_SHIFT; | |
441 | blk_end = pg_end << PAGE_CACHE_SHIFT; | |
442 | truncate_inode_pages_range(mapping, blk_start, | |
443 | blk_end - 1); | |
444 | ret = truncate_hole(inode, pg_start, pg_end); | |
445 | } | |
446 | } | |
447 | ||
448 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
449 | i_size_read(inode) <= (offset + len)) { | |
450 | i_size_write(inode, offset); | |
451 | mark_inode_dirty(inode); | |
452 | } | |
453 | ||
454 | return ret; | |
455 | } | |
456 | ||
457 | static int expand_inode_data(struct inode *inode, loff_t offset, | |
458 | loff_t len, int mode) | |
459 | { | |
460 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
461 | pgoff_t index, pg_start, pg_end; | |
462 | loff_t new_size = i_size_read(inode); | |
463 | loff_t off_start, off_end; | |
464 | int ret = 0; | |
465 | ||
466 | ret = inode_newsize_ok(inode, (len + offset)); | |
467 | if (ret) | |
468 | return ret; | |
469 | ||
470 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; | |
471 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
472 | ||
473 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
474 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
475 | ||
476 | for (index = pg_start; index <= pg_end; index++) { | |
477 | struct dnode_of_data dn; | |
478 | ||
479 | mutex_lock_op(sbi, DATA_NEW); | |
480 | ||
481 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 482 | ret = get_dnode_of_data(&dn, index, ALLOC_NODE); |
fbfa2cc5 JK |
483 | if (ret) { |
484 | mutex_unlock_op(sbi, DATA_NEW); | |
485 | break; | |
486 | } | |
487 | ||
488 | if (dn.data_blkaddr == NULL_ADDR) { | |
489 | ret = reserve_new_block(&dn); | |
490 | if (ret) { | |
491 | f2fs_put_dnode(&dn); | |
492 | mutex_unlock_op(sbi, DATA_NEW); | |
493 | break; | |
494 | } | |
495 | } | |
496 | f2fs_put_dnode(&dn); | |
497 | ||
498 | mutex_unlock_op(sbi, DATA_NEW); | |
499 | ||
500 | if (pg_start == pg_end) | |
501 | new_size = offset + len; | |
502 | else if (index == pg_start && off_start) | |
503 | new_size = (index + 1) << PAGE_CACHE_SHIFT; | |
504 | else if (index == pg_end) | |
505 | new_size = (index << PAGE_CACHE_SHIFT) + off_end; | |
506 | else | |
507 | new_size += PAGE_CACHE_SIZE; | |
508 | } | |
509 | ||
510 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
511 | i_size_read(inode) < new_size) { | |
512 | i_size_write(inode, new_size); | |
513 | mark_inode_dirty(inode); | |
514 | } | |
515 | ||
516 | return ret; | |
517 | } | |
518 | ||
519 | static long f2fs_fallocate(struct file *file, int mode, | |
520 | loff_t offset, loff_t len) | |
521 | { | |
6131ffaa | 522 | struct inode *inode = file_inode(file); |
fbfa2cc5 JK |
523 | long ret; |
524 | ||
525 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) | |
526 | return -EOPNOTSUPP; | |
527 | ||
528 | if (mode & FALLOC_FL_PUNCH_HOLE) | |
529 | ret = punch_hole(inode, offset, len, mode); | |
530 | else | |
531 | ret = expand_inode_data(inode, offset, len, mode); | |
532 | ||
3af60a49 NJ |
533 | if (!ret) { |
534 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
535 | mark_inode_dirty(inode); | |
536 | } | |
fbfa2cc5 JK |
537 | return ret; |
538 | } | |
539 | ||
540 | #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL)) | |
541 | #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL) | |
542 | ||
543 | static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags) | |
544 | { | |
545 | if (S_ISDIR(mode)) | |
546 | return flags; | |
547 | else if (S_ISREG(mode)) | |
548 | return flags & F2FS_REG_FLMASK; | |
549 | else | |
550 | return flags & F2FS_OTHER_FLMASK; | |
551 | } | |
552 | ||
553 | long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
554 | { | |
6131ffaa | 555 | struct inode *inode = file_inode(filp); |
fbfa2cc5 JK |
556 | struct f2fs_inode_info *fi = F2FS_I(inode); |
557 | unsigned int flags; | |
558 | int ret; | |
559 | ||
560 | switch (cmd) { | |
561 | case FS_IOC_GETFLAGS: | |
562 | flags = fi->i_flags & FS_FL_USER_VISIBLE; | |
563 | return put_user(flags, (int __user *) arg); | |
564 | case FS_IOC_SETFLAGS: | |
565 | { | |
566 | unsigned int oldflags; | |
567 | ||
568 | ret = mnt_want_write(filp->f_path.mnt); | |
569 | if (ret) | |
570 | return ret; | |
571 | ||
572 | if (!inode_owner_or_capable(inode)) { | |
573 | ret = -EACCES; | |
574 | goto out; | |
575 | } | |
576 | ||
577 | if (get_user(flags, (int __user *) arg)) { | |
578 | ret = -EFAULT; | |
579 | goto out; | |
580 | } | |
581 | ||
582 | flags = f2fs_mask_flags(inode->i_mode, flags); | |
583 | ||
584 | mutex_lock(&inode->i_mutex); | |
585 | ||
586 | oldflags = fi->i_flags; | |
587 | ||
588 | if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { | |
589 | if (!capable(CAP_LINUX_IMMUTABLE)) { | |
590 | mutex_unlock(&inode->i_mutex); | |
591 | ret = -EPERM; | |
592 | goto out; | |
593 | } | |
594 | } | |
595 | ||
596 | flags = flags & FS_FL_USER_MODIFIABLE; | |
597 | flags |= oldflags & ~FS_FL_USER_MODIFIABLE; | |
598 | fi->i_flags = flags; | |
599 | mutex_unlock(&inode->i_mutex); | |
600 | ||
601 | f2fs_set_inode_flags(inode); | |
602 | inode->i_ctime = CURRENT_TIME; | |
603 | mark_inode_dirty(inode); | |
604 | out: | |
605 | mnt_drop_write(filp->f_path.mnt); | |
606 | return ret; | |
607 | } | |
608 | default: | |
609 | return -ENOTTY; | |
610 | } | |
611 | } | |
612 | ||
e9750824 NJ |
613 | #ifdef CONFIG_COMPAT |
614 | long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
615 | { | |
616 | switch (cmd) { | |
617 | case F2FS_IOC32_GETFLAGS: | |
618 | cmd = F2FS_IOC_GETFLAGS; | |
619 | break; | |
620 | case F2FS_IOC32_SETFLAGS: | |
621 | cmd = F2FS_IOC_SETFLAGS; | |
622 | break; | |
623 | default: | |
624 | return -ENOIOCTLCMD; | |
625 | } | |
626 | return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); | |
627 | } | |
628 | #endif | |
629 | ||
fbfa2cc5 JK |
630 | const struct file_operations f2fs_file_operations = { |
631 | .llseek = generic_file_llseek, | |
632 | .read = do_sync_read, | |
633 | .write = do_sync_write, | |
634 | .aio_read = generic_file_aio_read, | |
635 | .aio_write = generic_file_aio_write, | |
636 | .open = generic_file_open, | |
637 | .mmap = f2fs_file_mmap, | |
638 | .fsync = f2fs_sync_file, | |
639 | .fallocate = f2fs_fallocate, | |
640 | .unlocked_ioctl = f2fs_ioctl, | |
e9750824 NJ |
641 | #ifdef CONFIG_COMPAT |
642 | .compat_ioctl = f2fs_compat_ioctl, | |
643 | #endif | |
fbfa2cc5 JK |
644 | .splice_read = generic_file_splice_read, |
645 | .splice_write = generic_file_splice_write, | |
646 | }; |