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" | |
a2a4a7e4 | 28 | #include <trace/events/f2fs.h> |
fbfa2cc5 JK |
29 | |
30 | static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma, | |
31 | struct vm_fault *vmf) | |
32 | { | |
33 | struct page *page = vmf->page; | |
6131ffaa | 34 | struct inode *inode = file_inode(vma->vm_file); |
fbfa2cc5 | 35 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
fbfa2cc5 JK |
36 | block_t old_blk_addr; |
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); |
266e97a8 | 47 | err = get_dnode_of_data(&dn, page->index, ALLOC_NODE); |
fbfa2cc5 | 48 | if (err) { |
e479556b | 49 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
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); | |
e479556b | 59 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
60 | goto out; |
61 | } | |
62 | } | |
63 | f2fs_put_dnode(&dn); | |
e479556b | 64 | f2fs_unlock_op(sbi); |
fbfa2cc5 | 65 | |
9851e6e1 | 66 | file_update_time(vma->vm_file); |
fbfa2cc5 JK |
67 | lock_page(page); |
68 | if (page->mapping != inode->i_mapping || | |
9851e6e1 | 69 | page_offset(page) > i_size_read(inode) || |
fbfa2cc5 JK |
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)) | |
9851e6e1 | 80 | goto mapped; |
fbfa2cc5 JK |
81 | |
82 | /* page is wholly or partially inside EOF */ | |
83 | if (((page->index + 1) << PAGE_CACHE_SHIFT) > i_size_read(inode)) { | |
84 | unsigned offset; | |
85 | offset = i_size_read(inode) & ~PAGE_CACHE_MASK; | |
86 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
87 | } | |
88 | set_page_dirty(page); | |
89 | SetPageUptodate(page); | |
90 | ||
e943a10d | 91 | trace_f2fs_vm_page_mkwrite(page, DATA); |
9851e6e1 NJ |
92 | mapped: |
93 | /* fill the page */ | |
94 | wait_on_page_writeback(page); | |
fbfa2cc5 JK |
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 | ||
354a3399 JK |
106 | static int get_parent_ino(struct inode *inode, nid_t *pino) |
107 | { | |
108 | struct dentry *dentry; | |
109 | ||
110 | inode = igrab(inode); | |
111 | dentry = d_find_any_alias(inode); | |
112 | iput(inode); | |
113 | if (!dentry) | |
114 | return 0; | |
115 | ||
f0947e5c JK |
116 | if (update_dent_inode(inode, &dentry->d_name)) { |
117 | dput(dentry); | |
118 | return 0; | |
119 | } | |
354a3399 | 120 | |
f0947e5c JK |
121 | *pino = parent_ino(dentry); |
122 | dput(dentry); | |
354a3399 JK |
123 | return 1; |
124 | } | |
125 | ||
fbfa2cc5 JK |
126 | int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) |
127 | { | |
128 | struct inode *inode = file->f_mapping->host; | |
129 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
fbfa2cc5 JK |
130 | int ret = 0; |
131 | bool need_cp = false; | |
132 | struct writeback_control wbc = { | |
133 | .sync_mode = WB_SYNC_ALL, | |
134 | .nr_to_write = LONG_MAX, | |
135 | .for_reclaim = 0, | |
136 | }; | |
137 | ||
77888c1e | 138 | if (f2fs_readonly(inode->i_sb)) |
1fa95b0b NJ |
139 | return 0; |
140 | ||
a2a4a7e4 | 141 | trace_f2fs_sync_file_enter(inode); |
fbfa2cc5 | 142 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
a2a4a7e4 NJ |
143 | if (ret) { |
144 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); | |
fbfa2cc5 | 145 | return ret; |
a2a4a7e4 | 146 | } |
fbfa2cc5 | 147 | |
7d82db83 JK |
148 | /* guarantee free sections for fsync */ |
149 | f2fs_balance_fs(sbi); | |
150 | ||
fbfa2cc5 JK |
151 | mutex_lock(&inode->i_mutex); |
152 | ||
e5d2385e JK |
153 | /* |
154 | * Both of fdatasync() and fsync() are able to be recovered from | |
155 | * sudden-power-off. | |
156 | */ | |
fbfa2cc5 JK |
157 | if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1) |
158 | need_cp = true; | |
354a3399 | 159 | else if (file_wrong_pino(inode)) |
fbfa2cc5 | 160 | need_cp = true; |
facb0205 | 161 | else if (!space_for_roll_forward(sbi)) |
fbfa2cc5 | 162 | need_cp = true; |
953a3e27 | 163 | else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino)) |
fbfa2cc5 | 164 | need_cp = true; |
d71b5564 | 165 | else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi))) |
e518ff81 | 166 | need_cp = true; |
fbfa2cc5 | 167 | |
fbfa2cc5 | 168 | if (need_cp) { |
354a3399 JK |
169 | nid_t pino; |
170 | ||
e518ff81 JK |
171 | F2FS_I(inode)->xattr_ver = 0; |
172 | ||
fbfa2cc5 JK |
173 | /* all the dirty node pages should be flushed for POR */ |
174 | ret = f2fs_sync_fs(inode->i_sb, 1); | |
354a3399 JK |
175 | if (file_wrong_pino(inode) && inode->i_nlink == 1 && |
176 | get_parent_ino(inode, &pino)) { | |
177 | F2FS_I(inode)->i_pino = pino; | |
178 | file_got_pino(inode); | |
179 | mark_inode_dirty_sync(inode); | |
180 | ret = f2fs_write_inode(inode, NULL); | |
181 | if (ret) | |
182 | goto out; | |
183 | } | |
fbfa2cc5 | 184 | } else { |
398b1ac5 JK |
185 | /* if there is no written node page, write its inode page */ |
186 | while (!sync_node_pages(sbi, inode->i_ino, &wbc)) { | |
b3783873 | 187 | mark_inode_dirty_sync(inode); |
398b1ac5 JK |
188 | ret = f2fs_write_inode(inode, NULL); |
189 | if (ret) | |
190 | goto out; | |
191 | } | |
fbfa2cc5 JK |
192 | filemap_fdatawait_range(sbi->node_inode->i_mapping, |
193 | 0, LONG_MAX); | |
ae51fb31 | 194 | ret = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL); |
fbfa2cc5 JK |
195 | } |
196 | out: | |
197 | mutex_unlock(&inode->i_mutex); | |
a2a4a7e4 | 198 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); |
fbfa2cc5 JK |
199 | return ret; |
200 | } | |
201 | ||
202 | static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma) | |
203 | { | |
204 | file_accessed(file); | |
205 | vma->vm_ops = &f2fs_file_vm_ops; | |
206 | return 0; | |
207 | } | |
208 | ||
b292dcab | 209 | int truncate_data_blocks_range(struct dnode_of_data *dn, int count) |
fbfa2cc5 JK |
210 | { |
211 | int nr_free = 0, ofs = dn->ofs_in_node; | |
212 | struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); | |
213 | struct f2fs_node *raw_node; | |
214 | __le32 *addr; | |
215 | ||
45590710 | 216 | raw_node = F2FS_NODE(dn->node_page); |
fbfa2cc5 JK |
217 | addr = blkaddr_in_node(raw_node) + ofs; |
218 | ||
219 | for ( ; count > 0; count--, addr++, dn->ofs_in_node++) { | |
220 | block_t blkaddr = le32_to_cpu(*addr); | |
221 | if (blkaddr == NULL_ADDR) | |
222 | continue; | |
223 | ||
224 | update_extent_cache(NULL_ADDR, dn); | |
225 | invalidate_blocks(sbi, blkaddr); | |
fbfa2cc5 JK |
226 | nr_free++; |
227 | } | |
228 | if (nr_free) { | |
d7cc950b | 229 | dec_valid_block_count(sbi, dn->inode, nr_free); |
fbfa2cc5 JK |
230 | set_page_dirty(dn->node_page); |
231 | sync_inode_page(dn); | |
232 | } | |
233 | dn->ofs_in_node = ofs; | |
51dd6249 NJ |
234 | |
235 | trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid, | |
236 | dn->ofs_in_node, nr_free); | |
fbfa2cc5 JK |
237 | return nr_free; |
238 | } | |
239 | ||
240 | void truncate_data_blocks(struct dnode_of_data *dn) | |
241 | { | |
242 | truncate_data_blocks_range(dn, ADDRS_PER_BLOCK); | |
243 | } | |
244 | ||
245 | static void truncate_partial_data_page(struct inode *inode, u64 from) | |
246 | { | |
247 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
248 | struct page *page; | |
249 | ||
250 | if (!offset) | |
251 | return; | |
252 | ||
c718379b | 253 | page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, false); |
fbfa2cc5 JK |
254 | if (IS_ERR(page)) |
255 | return; | |
256 | ||
257 | lock_page(page); | |
afcb7ca0 JK |
258 | if (page->mapping != inode->i_mapping) { |
259 | f2fs_put_page(page, 1); | |
260 | return; | |
261 | } | |
fbfa2cc5 JK |
262 | wait_on_page_writeback(page); |
263 | zero_user(page, offset, PAGE_CACHE_SIZE - offset); | |
264 | set_page_dirty(page); | |
265 | f2fs_put_page(page, 1); | |
266 | } | |
267 | ||
268 | static int truncate_blocks(struct inode *inode, u64 from) | |
269 | { | |
270 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
271 | unsigned int blocksize = inode->i_sb->s_blocksize; | |
272 | struct dnode_of_data dn; | |
273 | pgoff_t free_from; | |
e479556b | 274 | int count = 0; |
fbfa2cc5 JK |
275 | int err; |
276 | ||
51dd6249 NJ |
277 | trace_f2fs_truncate_blocks_enter(inode, from); |
278 | ||
fbfa2cc5 JK |
279 | free_from = (pgoff_t) |
280 | ((from + blocksize - 1) >> (sbi->log_blocksize)); | |
281 | ||
e479556b | 282 | f2fs_lock_op(sbi); |
fbfa2cc5 | 283 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 284 | err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE); |
fbfa2cc5 JK |
285 | if (err) { |
286 | if (err == -ENOENT) | |
287 | goto free_next; | |
e479556b | 288 | f2fs_unlock_op(sbi); |
51dd6249 | 289 | trace_f2fs_truncate_blocks_exit(inode, err); |
fbfa2cc5 JK |
290 | return err; |
291 | } | |
292 | ||
293 | if (IS_INODE(dn.node_page)) | |
de93653f | 294 | count = ADDRS_PER_INODE(F2FS_I(inode)); |
fbfa2cc5 JK |
295 | else |
296 | count = ADDRS_PER_BLOCK; | |
297 | ||
298 | count -= dn.ofs_in_node; | |
5d56b671 | 299 | f2fs_bug_on(count < 0); |
39936837 | 300 | |
fbfa2cc5 JK |
301 | if (dn.ofs_in_node || IS_INODE(dn.node_page)) { |
302 | truncate_data_blocks_range(&dn, count); | |
303 | free_from += count; | |
304 | } | |
305 | ||
306 | f2fs_put_dnode(&dn); | |
307 | free_next: | |
308 | err = truncate_inode_blocks(inode, free_from); | |
e479556b | 309 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
310 | |
311 | /* lastly zero out the first data page */ | |
312 | truncate_partial_data_page(inode, from); | |
313 | ||
51dd6249 | 314 | trace_f2fs_truncate_blocks_exit(inode, err); |
fbfa2cc5 JK |
315 | return err; |
316 | } | |
317 | ||
318 | void f2fs_truncate(struct inode *inode) | |
319 | { | |
320 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
321 | S_ISLNK(inode->i_mode))) | |
322 | return; | |
323 | ||
51dd6249 NJ |
324 | trace_f2fs_truncate(inode); |
325 | ||
fbfa2cc5 JK |
326 | if (!truncate_blocks(inode, i_size_read(inode))) { |
327 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
328 | mark_inode_dirty(inode); | |
329 | } | |
fbfa2cc5 JK |
330 | } |
331 | ||
2d4d9fb5 | 332 | int f2fs_getattr(struct vfsmount *mnt, |
fbfa2cc5 JK |
333 | struct dentry *dentry, struct kstat *stat) |
334 | { | |
335 | struct inode *inode = dentry->d_inode; | |
336 | generic_fillattr(inode, stat); | |
337 | stat->blocks <<= 3; | |
338 | return 0; | |
339 | } | |
340 | ||
341 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
342 | static void __setattr_copy(struct inode *inode, const struct iattr *attr) | |
343 | { | |
344 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
345 | unsigned int ia_valid = attr->ia_valid; | |
346 | ||
347 | if (ia_valid & ATTR_UID) | |
348 | inode->i_uid = attr->ia_uid; | |
349 | if (ia_valid & ATTR_GID) | |
350 | inode->i_gid = attr->ia_gid; | |
351 | if (ia_valid & ATTR_ATIME) | |
352 | inode->i_atime = timespec_trunc(attr->ia_atime, | |
353 | inode->i_sb->s_time_gran); | |
354 | if (ia_valid & ATTR_MTIME) | |
355 | inode->i_mtime = timespec_trunc(attr->ia_mtime, | |
356 | inode->i_sb->s_time_gran); | |
357 | if (ia_valid & ATTR_CTIME) | |
358 | inode->i_ctime = timespec_trunc(attr->ia_ctime, | |
359 | inode->i_sb->s_time_gran); | |
360 | if (ia_valid & ATTR_MODE) { | |
361 | umode_t mode = attr->ia_mode; | |
362 | ||
363 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
364 | mode &= ~S_ISGID; | |
365 | set_acl_inode(fi, mode); | |
366 | } | |
367 | } | |
368 | #else | |
369 | #define __setattr_copy setattr_copy | |
370 | #endif | |
371 | ||
372 | int f2fs_setattr(struct dentry *dentry, struct iattr *attr) | |
373 | { | |
374 | struct inode *inode = dentry->d_inode; | |
375 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
376 | int err; | |
377 | ||
378 | err = inode_change_ok(inode, attr); | |
379 | if (err) | |
380 | return err; | |
381 | ||
382 | if ((attr->ia_valid & ATTR_SIZE) && | |
383 | attr->ia_size != i_size_read(inode)) { | |
384 | truncate_setsize(inode, attr->ia_size); | |
385 | f2fs_truncate(inode); | |
d4686d56 | 386 | f2fs_balance_fs(F2FS_SB(inode->i_sb)); |
fbfa2cc5 JK |
387 | } |
388 | ||
389 | __setattr_copy(inode, attr); | |
390 | ||
391 | if (attr->ia_valid & ATTR_MODE) { | |
392 | err = f2fs_acl_chmod(inode); | |
393 | if (err || is_inode_flag_set(fi, FI_ACL_MODE)) { | |
394 | inode->i_mode = fi->i_acl_mode; | |
395 | clear_inode_flag(fi, FI_ACL_MODE); | |
396 | } | |
397 | } | |
398 | ||
399 | mark_inode_dirty(inode); | |
400 | return err; | |
401 | } | |
402 | ||
403 | const struct inode_operations f2fs_file_inode_operations = { | |
404 | .getattr = f2fs_getattr, | |
405 | .setattr = f2fs_setattr, | |
406 | .get_acl = f2fs_get_acl, | |
407 | #ifdef CONFIG_F2FS_FS_XATTR | |
408 | .setxattr = generic_setxattr, | |
409 | .getxattr = generic_getxattr, | |
410 | .listxattr = f2fs_listxattr, | |
411 | .removexattr = generic_removexattr, | |
412 | #endif | |
413 | }; | |
414 | ||
415 | static void fill_zero(struct inode *inode, pgoff_t index, | |
416 | loff_t start, loff_t len) | |
417 | { | |
bd43df02 | 418 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
fbfa2cc5 JK |
419 | struct page *page; |
420 | ||
421 | if (!len) | |
422 | return; | |
423 | ||
bd43df02 JK |
424 | f2fs_balance_fs(sbi); |
425 | ||
e479556b | 426 | f2fs_lock_op(sbi); |
64aa7ed9 | 427 | page = get_new_data_page(inode, NULL, index, false); |
e479556b | 428 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
429 | |
430 | if (!IS_ERR(page)) { | |
431 | wait_on_page_writeback(page); | |
432 | zero_user(page, start, len); | |
433 | set_page_dirty(page); | |
434 | f2fs_put_page(page, 1); | |
435 | } | |
436 | } | |
437 | ||
438 | int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) | |
439 | { | |
440 | pgoff_t index; | |
441 | int err; | |
442 | ||
443 | for (index = pg_start; index < pg_end; index++) { | |
444 | struct dnode_of_data dn; | |
9eaeba70 | 445 | |
fbfa2cc5 | 446 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 447 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
fbfa2cc5 | 448 | if (err) { |
fbfa2cc5 JK |
449 | if (err == -ENOENT) |
450 | continue; | |
451 | return err; | |
452 | } | |
453 | ||
454 | if (dn.data_blkaddr != NULL_ADDR) | |
455 | truncate_data_blocks_range(&dn, 1); | |
456 | f2fs_put_dnode(&dn); | |
fbfa2cc5 JK |
457 | } |
458 | return 0; | |
459 | } | |
460 | ||
461 | static int punch_hole(struct inode *inode, loff_t offset, loff_t len, int mode) | |
462 | { | |
463 | pgoff_t pg_start, pg_end; | |
464 | loff_t off_start, off_end; | |
465 | int ret = 0; | |
466 | ||
467 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; | |
468 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
469 | ||
470 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
471 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
472 | ||
473 | if (pg_start == pg_end) { | |
474 | fill_zero(inode, pg_start, off_start, | |
475 | off_end - off_start); | |
476 | } else { | |
477 | if (off_start) | |
478 | fill_zero(inode, pg_start++, off_start, | |
479 | PAGE_CACHE_SIZE - off_start); | |
480 | if (off_end) | |
481 | fill_zero(inode, pg_end, 0, off_end); | |
482 | ||
483 | if (pg_start < pg_end) { | |
484 | struct address_space *mapping = inode->i_mapping; | |
485 | loff_t blk_start, blk_end; | |
1127a3d4 JH |
486 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
487 | ||
488 | f2fs_balance_fs(sbi); | |
fbfa2cc5 JK |
489 | |
490 | blk_start = pg_start << PAGE_CACHE_SHIFT; | |
491 | blk_end = pg_end << PAGE_CACHE_SHIFT; | |
492 | truncate_inode_pages_range(mapping, blk_start, | |
493 | blk_end - 1); | |
39936837 | 494 | |
e479556b | 495 | f2fs_lock_op(sbi); |
fbfa2cc5 | 496 | ret = truncate_hole(inode, pg_start, pg_end); |
e479556b | 497 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
498 | } |
499 | } | |
500 | ||
501 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
502 | i_size_read(inode) <= (offset + len)) { | |
503 | i_size_write(inode, offset); | |
504 | mark_inode_dirty(inode); | |
505 | } | |
506 | ||
507 | return ret; | |
508 | } | |
509 | ||
510 | static int expand_inode_data(struct inode *inode, loff_t offset, | |
511 | loff_t len, int mode) | |
512 | { | |
513 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
514 | pgoff_t index, pg_start, pg_end; | |
515 | loff_t new_size = i_size_read(inode); | |
516 | loff_t off_start, off_end; | |
517 | int ret = 0; | |
518 | ||
519 | ret = inode_newsize_ok(inode, (len + offset)); | |
520 | if (ret) | |
521 | return ret; | |
522 | ||
523 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; | |
524 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
525 | ||
526 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
527 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
528 | ||
529 | for (index = pg_start; index <= pg_end; index++) { | |
530 | struct dnode_of_data dn; | |
531 | ||
e479556b | 532 | f2fs_lock_op(sbi); |
fbfa2cc5 | 533 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 534 | ret = get_dnode_of_data(&dn, index, ALLOC_NODE); |
fbfa2cc5 | 535 | if (ret) { |
e479556b | 536 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
537 | break; |
538 | } | |
539 | ||
540 | if (dn.data_blkaddr == NULL_ADDR) { | |
541 | ret = reserve_new_block(&dn); | |
542 | if (ret) { | |
543 | f2fs_put_dnode(&dn); | |
e479556b | 544 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
545 | break; |
546 | } | |
547 | } | |
548 | f2fs_put_dnode(&dn); | |
e479556b | 549 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
550 | |
551 | if (pg_start == pg_end) | |
552 | new_size = offset + len; | |
553 | else if (index == pg_start && off_start) | |
554 | new_size = (index + 1) << PAGE_CACHE_SHIFT; | |
555 | else if (index == pg_end) | |
556 | new_size = (index << PAGE_CACHE_SHIFT) + off_end; | |
557 | else | |
558 | new_size += PAGE_CACHE_SIZE; | |
559 | } | |
560 | ||
561 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
562 | i_size_read(inode) < new_size) { | |
563 | i_size_write(inode, new_size); | |
564 | mark_inode_dirty(inode); | |
565 | } | |
566 | ||
567 | return ret; | |
568 | } | |
569 | ||
570 | static long f2fs_fallocate(struct file *file, int mode, | |
571 | loff_t offset, loff_t len) | |
572 | { | |
6131ffaa | 573 | struct inode *inode = file_inode(file); |
fbfa2cc5 JK |
574 | long ret; |
575 | ||
576 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) | |
577 | return -EOPNOTSUPP; | |
578 | ||
579 | if (mode & FALLOC_FL_PUNCH_HOLE) | |
580 | ret = punch_hole(inode, offset, len, mode); | |
581 | else | |
582 | ret = expand_inode_data(inode, offset, len, mode); | |
583 | ||
3af60a49 NJ |
584 | if (!ret) { |
585 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
586 | mark_inode_dirty(inode); | |
587 | } | |
c01e2853 | 588 | trace_f2fs_fallocate(inode, mode, offset, len, ret); |
fbfa2cc5 JK |
589 | return ret; |
590 | } | |
591 | ||
592 | #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL)) | |
593 | #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL) | |
594 | ||
595 | static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags) | |
596 | { | |
597 | if (S_ISDIR(mode)) | |
598 | return flags; | |
599 | else if (S_ISREG(mode)) | |
600 | return flags & F2FS_REG_FLMASK; | |
601 | else | |
602 | return flags & F2FS_OTHER_FLMASK; | |
603 | } | |
604 | ||
605 | long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
606 | { | |
6131ffaa | 607 | struct inode *inode = file_inode(filp); |
fbfa2cc5 JK |
608 | struct f2fs_inode_info *fi = F2FS_I(inode); |
609 | unsigned int flags; | |
610 | int ret; | |
611 | ||
612 | switch (cmd) { | |
6a3e8ef0 | 613 | case F2FS_IOC_GETFLAGS: |
fbfa2cc5 JK |
614 | flags = fi->i_flags & FS_FL_USER_VISIBLE; |
615 | return put_user(flags, (int __user *) arg); | |
6a3e8ef0 | 616 | case F2FS_IOC_SETFLAGS: |
fbfa2cc5 JK |
617 | { |
618 | unsigned int oldflags; | |
619 | ||
bdaec334 | 620 | ret = mnt_want_write_file(filp); |
fbfa2cc5 JK |
621 | if (ret) |
622 | return ret; | |
623 | ||
624 | if (!inode_owner_or_capable(inode)) { | |
625 | ret = -EACCES; | |
626 | goto out; | |
627 | } | |
628 | ||
629 | if (get_user(flags, (int __user *) arg)) { | |
630 | ret = -EFAULT; | |
631 | goto out; | |
632 | } | |
633 | ||
634 | flags = f2fs_mask_flags(inode->i_mode, flags); | |
635 | ||
636 | mutex_lock(&inode->i_mutex); | |
637 | ||
638 | oldflags = fi->i_flags; | |
639 | ||
640 | if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { | |
641 | if (!capable(CAP_LINUX_IMMUTABLE)) { | |
642 | mutex_unlock(&inode->i_mutex); | |
643 | ret = -EPERM; | |
644 | goto out; | |
645 | } | |
646 | } | |
647 | ||
648 | flags = flags & FS_FL_USER_MODIFIABLE; | |
649 | flags |= oldflags & ~FS_FL_USER_MODIFIABLE; | |
650 | fi->i_flags = flags; | |
651 | mutex_unlock(&inode->i_mutex); | |
652 | ||
653 | f2fs_set_inode_flags(inode); | |
654 | inode->i_ctime = CURRENT_TIME; | |
655 | mark_inode_dirty(inode); | |
656 | out: | |
bdaec334 | 657 | mnt_drop_write_file(filp); |
fbfa2cc5 JK |
658 | return ret; |
659 | } | |
660 | default: | |
661 | return -ENOTTY; | |
662 | } | |
663 | } | |
664 | ||
e9750824 NJ |
665 | #ifdef CONFIG_COMPAT |
666 | long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
667 | { | |
668 | switch (cmd) { | |
669 | case F2FS_IOC32_GETFLAGS: | |
670 | cmd = F2FS_IOC_GETFLAGS; | |
671 | break; | |
672 | case F2FS_IOC32_SETFLAGS: | |
673 | cmd = F2FS_IOC_SETFLAGS; | |
674 | break; | |
675 | default: | |
676 | return -ENOIOCTLCMD; | |
677 | } | |
678 | return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); | |
679 | } | |
680 | #endif | |
681 | ||
fbfa2cc5 JK |
682 | const struct file_operations f2fs_file_operations = { |
683 | .llseek = generic_file_llseek, | |
684 | .read = do_sync_read, | |
685 | .write = do_sync_write, | |
686 | .aio_read = generic_file_aio_read, | |
687 | .aio_write = generic_file_aio_write, | |
688 | .open = generic_file_open, | |
689 | .mmap = f2fs_file_mmap, | |
690 | .fsync = f2fs_sync_file, | |
691 | .fallocate = f2fs_fallocate, | |
692 | .unlocked_ioctl = f2fs_ioctl, | |
e9750824 NJ |
693 | #ifdef CONFIG_COMPAT |
694 | .compat_ioctl = f2fs_compat_ioctl, | |
695 | #endif | |
fbfa2cc5 JK |
696 | .splice_read = generic_file_splice_read, |
697 | .splice_write = generic_file_splice_write, | |
698 | }; |