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 | 36 | struct dnode_of_data dn; |
e479556b | 37 | int err; |
fbfa2cc5 JK |
38 | |
39 | f2fs_balance_fs(sbi); | |
40 | ||
41 | sb_start_pagefault(inode->i_sb); | |
42 | ||
fbfa2cc5 | 43 | /* block allocation */ |
e479556b | 44 | f2fs_lock_op(sbi); |
fbfa2cc5 | 45 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
b600965c | 46 | err = f2fs_reserve_block(&dn, page->index); |
e479556b | 47 | f2fs_unlock_op(sbi); |
b600965c HL |
48 | if (err) |
49 | goto out; | |
fbfa2cc5 | 50 | |
9851e6e1 | 51 | file_update_time(vma->vm_file); |
fbfa2cc5 | 52 | lock_page(page); |
6bacf52f | 53 | if (unlikely(page->mapping != inode->i_mapping || |
9851e6e1 | 54 | page_offset(page) > i_size_read(inode) || |
6bacf52f | 55 | !PageUptodate(page))) { |
fbfa2cc5 JK |
56 | unlock_page(page); |
57 | err = -EFAULT; | |
58 | goto out; | |
59 | } | |
60 | ||
61 | /* | |
62 | * check to see if the page is mapped already (no holes) | |
63 | */ | |
64 | if (PageMappedToDisk(page)) | |
9851e6e1 | 65 | goto mapped; |
fbfa2cc5 JK |
66 | |
67 | /* page is wholly or partially inside EOF */ | |
68 | if (((page->index + 1) << PAGE_CACHE_SHIFT) > i_size_read(inode)) { | |
69 | unsigned offset; | |
70 | offset = i_size_read(inode) & ~PAGE_CACHE_MASK; | |
71 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
72 | } | |
73 | set_page_dirty(page); | |
74 | SetPageUptodate(page); | |
75 | ||
e943a10d | 76 | trace_f2fs_vm_page_mkwrite(page, DATA); |
9851e6e1 NJ |
77 | mapped: |
78 | /* fill the page */ | |
79 | wait_on_page_writeback(page); | |
fbfa2cc5 JK |
80 | out: |
81 | sb_end_pagefault(inode->i_sb); | |
82 | return block_page_mkwrite_return(err); | |
83 | } | |
84 | ||
85 | static const struct vm_operations_struct f2fs_file_vm_ops = { | |
692bb55d JK |
86 | .fault = filemap_fault, |
87 | .page_mkwrite = f2fs_vm_page_mkwrite, | |
88 | .remap_pages = generic_file_remap_pages, | |
fbfa2cc5 JK |
89 | }; |
90 | ||
354a3399 JK |
91 | static int get_parent_ino(struct inode *inode, nid_t *pino) |
92 | { | |
93 | struct dentry *dentry; | |
94 | ||
95 | inode = igrab(inode); | |
96 | dentry = d_find_any_alias(inode); | |
97 | iput(inode); | |
98 | if (!dentry) | |
99 | return 0; | |
100 | ||
f0947e5c JK |
101 | if (update_dent_inode(inode, &dentry->d_name)) { |
102 | dput(dentry); | |
103 | return 0; | |
104 | } | |
354a3399 | 105 | |
f0947e5c JK |
106 | *pino = parent_ino(dentry); |
107 | dput(dentry); | |
354a3399 JK |
108 | return 1; |
109 | } | |
110 | ||
fbfa2cc5 JK |
111 | int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) |
112 | { | |
113 | struct inode *inode = file->f_mapping->host; | |
114 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
fbfa2cc5 JK |
115 | int ret = 0; |
116 | bool need_cp = false; | |
117 | struct writeback_control wbc = { | |
fb5566da | 118 | .sync_mode = WB_SYNC_NONE, |
fbfa2cc5 JK |
119 | .nr_to_write = LONG_MAX, |
120 | .for_reclaim = 0, | |
121 | }; | |
122 | ||
6bacf52f | 123 | if (unlikely(f2fs_readonly(inode->i_sb))) |
1fa95b0b NJ |
124 | return 0; |
125 | ||
a2a4a7e4 | 126 | trace_f2fs_sync_file_enter(inode); |
fbfa2cc5 | 127 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
a2a4a7e4 NJ |
128 | if (ret) { |
129 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); | |
fbfa2cc5 | 130 | return ret; |
a2a4a7e4 | 131 | } |
fbfa2cc5 | 132 | |
7d82db83 JK |
133 | /* guarantee free sections for fsync */ |
134 | f2fs_balance_fs(sbi); | |
135 | ||
fbfa2cc5 JK |
136 | mutex_lock(&inode->i_mutex); |
137 | ||
e5d2385e JK |
138 | /* |
139 | * Both of fdatasync() and fsync() are able to be recovered from | |
140 | * sudden-power-off. | |
141 | */ | |
fbfa2cc5 JK |
142 | if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1) |
143 | need_cp = true; | |
354a3399 | 144 | else if (file_wrong_pino(inode)) |
fbfa2cc5 | 145 | need_cp = true; |
facb0205 | 146 | else if (!space_for_roll_forward(sbi)) |
fbfa2cc5 | 147 | need_cp = true; |
953a3e27 | 148 | else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino)) |
fbfa2cc5 | 149 | need_cp = true; |
d71b5564 | 150 | else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi))) |
e518ff81 | 151 | need_cp = true; |
fbfa2cc5 | 152 | |
fbfa2cc5 | 153 | if (need_cp) { |
354a3399 JK |
154 | nid_t pino; |
155 | ||
e518ff81 JK |
156 | F2FS_I(inode)->xattr_ver = 0; |
157 | ||
fbfa2cc5 JK |
158 | /* all the dirty node pages should be flushed for POR */ |
159 | ret = f2fs_sync_fs(inode->i_sb, 1); | |
354a3399 JK |
160 | if (file_wrong_pino(inode) && inode->i_nlink == 1 && |
161 | get_parent_ino(inode, &pino)) { | |
162 | F2FS_I(inode)->i_pino = pino; | |
163 | file_got_pino(inode); | |
164 | mark_inode_dirty_sync(inode); | |
165 | ret = f2fs_write_inode(inode, NULL); | |
166 | if (ret) | |
167 | goto out; | |
168 | } | |
fbfa2cc5 | 169 | } else { |
398b1ac5 JK |
170 | /* if there is no written node page, write its inode page */ |
171 | while (!sync_node_pages(sbi, inode->i_ino, &wbc)) { | |
b3783873 | 172 | mark_inode_dirty_sync(inode); |
398b1ac5 JK |
173 | ret = f2fs_write_inode(inode, NULL); |
174 | if (ret) | |
175 | goto out; | |
176 | } | |
cfe58f9d JK |
177 | ret = wait_on_node_pages_writeback(sbi, inode->i_ino); |
178 | if (ret) | |
179 | goto out; | |
ae51fb31 | 180 | ret = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL); |
fbfa2cc5 JK |
181 | } |
182 | out: | |
183 | mutex_unlock(&inode->i_mutex); | |
a2a4a7e4 | 184 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); |
fbfa2cc5 JK |
185 | return ret; |
186 | } | |
187 | ||
188 | static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma) | |
189 | { | |
190 | file_accessed(file); | |
191 | vma->vm_ops = &f2fs_file_vm_ops; | |
192 | return 0; | |
193 | } | |
194 | ||
b292dcab | 195 | int truncate_data_blocks_range(struct dnode_of_data *dn, int count) |
fbfa2cc5 JK |
196 | { |
197 | int nr_free = 0, ofs = dn->ofs_in_node; | |
198 | struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); | |
199 | struct f2fs_node *raw_node; | |
200 | __le32 *addr; | |
201 | ||
45590710 | 202 | raw_node = F2FS_NODE(dn->node_page); |
fbfa2cc5 JK |
203 | addr = blkaddr_in_node(raw_node) + ofs; |
204 | ||
6c311ec6 | 205 | for (; count > 0; count--, addr++, dn->ofs_in_node++) { |
fbfa2cc5 JK |
206 | block_t blkaddr = le32_to_cpu(*addr); |
207 | if (blkaddr == NULL_ADDR) | |
208 | continue; | |
209 | ||
210 | update_extent_cache(NULL_ADDR, dn); | |
211 | invalidate_blocks(sbi, blkaddr); | |
fbfa2cc5 JK |
212 | nr_free++; |
213 | } | |
214 | if (nr_free) { | |
d7cc950b | 215 | dec_valid_block_count(sbi, dn->inode, nr_free); |
fbfa2cc5 JK |
216 | set_page_dirty(dn->node_page); |
217 | sync_inode_page(dn); | |
218 | } | |
219 | dn->ofs_in_node = ofs; | |
51dd6249 NJ |
220 | |
221 | trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid, | |
222 | dn->ofs_in_node, nr_free); | |
fbfa2cc5 JK |
223 | return nr_free; |
224 | } | |
225 | ||
226 | void truncate_data_blocks(struct dnode_of_data *dn) | |
227 | { | |
228 | truncate_data_blocks_range(dn, ADDRS_PER_BLOCK); | |
229 | } | |
230 | ||
231 | static void truncate_partial_data_page(struct inode *inode, u64 from) | |
232 | { | |
233 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
234 | struct page *page; | |
235 | ||
236 | if (!offset) | |
237 | return; | |
238 | ||
c718379b | 239 | page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, false); |
fbfa2cc5 JK |
240 | if (IS_ERR(page)) |
241 | return; | |
242 | ||
243 | lock_page(page); | |
6bacf52f | 244 | if (unlikely(page->mapping != inode->i_mapping)) { |
afcb7ca0 JK |
245 | f2fs_put_page(page, 1); |
246 | return; | |
247 | } | |
fbfa2cc5 JK |
248 | wait_on_page_writeback(page); |
249 | zero_user(page, offset, PAGE_CACHE_SIZE - offset); | |
250 | set_page_dirty(page); | |
251 | f2fs_put_page(page, 1); | |
252 | } | |
253 | ||
1e1bb4ba | 254 | int truncate_blocks(struct inode *inode, u64 from) |
fbfa2cc5 JK |
255 | { |
256 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
257 | unsigned int blocksize = inode->i_sb->s_blocksize; | |
258 | struct dnode_of_data dn; | |
259 | pgoff_t free_from; | |
9ffe0fb5 | 260 | int count = 0, err = 0; |
fbfa2cc5 | 261 | |
51dd6249 NJ |
262 | trace_f2fs_truncate_blocks_enter(inode, from); |
263 | ||
f185ff97 JK |
264 | if (f2fs_has_inline_data(inode)) |
265 | goto done; | |
266 | ||
fbfa2cc5 JK |
267 | free_from = (pgoff_t) |
268 | ((from + blocksize - 1) >> (sbi->log_blocksize)); | |
269 | ||
e479556b | 270 | f2fs_lock_op(sbi); |
9ffe0fb5 | 271 | |
fbfa2cc5 | 272 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 273 | err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE); |
fbfa2cc5 JK |
274 | if (err) { |
275 | if (err == -ENOENT) | |
276 | goto free_next; | |
e479556b | 277 | f2fs_unlock_op(sbi); |
51dd6249 | 278 | trace_f2fs_truncate_blocks_exit(inode, err); |
fbfa2cc5 JK |
279 | return err; |
280 | } | |
281 | ||
282 | if (IS_INODE(dn.node_page)) | |
de93653f | 283 | count = ADDRS_PER_INODE(F2FS_I(inode)); |
fbfa2cc5 JK |
284 | else |
285 | count = ADDRS_PER_BLOCK; | |
286 | ||
287 | count -= dn.ofs_in_node; | |
5d56b671 | 288 | f2fs_bug_on(count < 0); |
39936837 | 289 | |
fbfa2cc5 JK |
290 | if (dn.ofs_in_node || IS_INODE(dn.node_page)) { |
291 | truncate_data_blocks_range(&dn, count); | |
292 | free_from += count; | |
293 | } | |
294 | ||
295 | f2fs_put_dnode(&dn); | |
296 | free_next: | |
297 | err = truncate_inode_blocks(inode, free_from); | |
e479556b | 298 | f2fs_unlock_op(sbi); |
f185ff97 | 299 | done: |
fbfa2cc5 JK |
300 | /* lastly zero out the first data page */ |
301 | truncate_partial_data_page(inode, from); | |
302 | ||
51dd6249 | 303 | trace_f2fs_truncate_blocks_exit(inode, err); |
fbfa2cc5 JK |
304 | return err; |
305 | } | |
306 | ||
307 | void f2fs_truncate(struct inode *inode) | |
308 | { | |
309 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
310 | S_ISLNK(inode->i_mode))) | |
311 | return; | |
312 | ||
51dd6249 NJ |
313 | trace_f2fs_truncate(inode); |
314 | ||
fbfa2cc5 JK |
315 | if (!truncate_blocks(inode, i_size_read(inode))) { |
316 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
317 | mark_inode_dirty(inode); | |
318 | } | |
fbfa2cc5 JK |
319 | } |
320 | ||
2d4d9fb5 | 321 | int f2fs_getattr(struct vfsmount *mnt, |
fbfa2cc5 JK |
322 | struct dentry *dentry, struct kstat *stat) |
323 | { | |
324 | struct inode *inode = dentry->d_inode; | |
325 | generic_fillattr(inode, stat); | |
326 | stat->blocks <<= 3; | |
327 | return 0; | |
328 | } | |
329 | ||
330 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
331 | static void __setattr_copy(struct inode *inode, const struct iattr *attr) | |
332 | { | |
333 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
334 | unsigned int ia_valid = attr->ia_valid; | |
335 | ||
336 | if (ia_valid & ATTR_UID) | |
337 | inode->i_uid = attr->ia_uid; | |
338 | if (ia_valid & ATTR_GID) | |
339 | inode->i_gid = attr->ia_gid; | |
340 | if (ia_valid & ATTR_ATIME) | |
341 | inode->i_atime = timespec_trunc(attr->ia_atime, | |
342 | inode->i_sb->s_time_gran); | |
343 | if (ia_valid & ATTR_MTIME) | |
344 | inode->i_mtime = timespec_trunc(attr->ia_mtime, | |
345 | inode->i_sb->s_time_gran); | |
346 | if (ia_valid & ATTR_CTIME) | |
347 | inode->i_ctime = timespec_trunc(attr->ia_ctime, | |
348 | inode->i_sb->s_time_gran); | |
349 | if (ia_valid & ATTR_MODE) { | |
350 | umode_t mode = attr->ia_mode; | |
351 | ||
352 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
353 | mode &= ~S_ISGID; | |
354 | set_acl_inode(fi, mode); | |
355 | } | |
356 | } | |
357 | #else | |
358 | #define __setattr_copy setattr_copy | |
359 | #endif | |
360 | ||
361 | int f2fs_setattr(struct dentry *dentry, struct iattr *attr) | |
362 | { | |
363 | struct inode *inode = dentry->d_inode; | |
364 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
365 | int err; | |
366 | ||
367 | err = inode_change_ok(inode, attr); | |
368 | if (err) | |
369 | return err; | |
370 | ||
371 | if ((attr->ia_valid & ATTR_SIZE) && | |
372 | attr->ia_size != i_size_read(inode)) { | |
9e09fc85 JK |
373 | err = f2fs_convert_inline_data(inode, attr->ia_size); |
374 | if (err) | |
375 | return err; | |
9ffe0fb5 | 376 | |
fbfa2cc5 | 377 | truncate_setsize(inode, attr->ia_size); |
9e09fc85 | 378 | f2fs_truncate(inode); |
d4686d56 | 379 | f2fs_balance_fs(F2FS_SB(inode->i_sb)); |
fbfa2cc5 JK |
380 | } |
381 | ||
382 | __setattr_copy(inode, attr); | |
383 | ||
384 | if (attr->ia_valid & ATTR_MODE) { | |
a6dda0e6 | 385 | err = posix_acl_chmod(inode, get_inode_mode(inode)); |
fbfa2cc5 JK |
386 | if (err || is_inode_flag_set(fi, FI_ACL_MODE)) { |
387 | inode->i_mode = fi->i_acl_mode; | |
388 | clear_inode_flag(fi, FI_ACL_MODE); | |
389 | } | |
390 | } | |
391 | ||
392 | mark_inode_dirty(inode); | |
393 | return err; | |
394 | } | |
395 | ||
396 | const struct inode_operations f2fs_file_inode_operations = { | |
397 | .getattr = f2fs_getattr, | |
398 | .setattr = f2fs_setattr, | |
399 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 400 | .set_acl = f2fs_set_acl, |
fbfa2cc5 JK |
401 | #ifdef CONFIG_F2FS_FS_XATTR |
402 | .setxattr = generic_setxattr, | |
403 | .getxattr = generic_getxattr, | |
404 | .listxattr = f2fs_listxattr, | |
405 | .removexattr = generic_removexattr, | |
406 | #endif | |
407 | }; | |
408 | ||
409 | static void fill_zero(struct inode *inode, pgoff_t index, | |
410 | loff_t start, loff_t len) | |
411 | { | |
bd43df02 | 412 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
fbfa2cc5 JK |
413 | struct page *page; |
414 | ||
415 | if (!len) | |
416 | return; | |
417 | ||
bd43df02 JK |
418 | f2fs_balance_fs(sbi); |
419 | ||
e479556b | 420 | f2fs_lock_op(sbi); |
64aa7ed9 | 421 | page = get_new_data_page(inode, NULL, index, false); |
e479556b | 422 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
423 | |
424 | if (!IS_ERR(page)) { | |
425 | wait_on_page_writeback(page); | |
426 | zero_user(page, start, len); | |
427 | set_page_dirty(page); | |
428 | f2fs_put_page(page, 1); | |
429 | } | |
430 | } | |
431 | ||
432 | int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) | |
433 | { | |
434 | pgoff_t index; | |
435 | int err; | |
436 | ||
437 | for (index = pg_start; index < pg_end; index++) { | |
438 | struct dnode_of_data dn; | |
9eaeba70 | 439 | |
fbfa2cc5 | 440 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 441 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
fbfa2cc5 | 442 | if (err) { |
fbfa2cc5 JK |
443 | if (err == -ENOENT) |
444 | continue; | |
445 | return err; | |
446 | } | |
447 | ||
448 | if (dn.data_blkaddr != NULL_ADDR) | |
449 | truncate_data_blocks_range(&dn, 1); | |
450 | f2fs_put_dnode(&dn); | |
fbfa2cc5 JK |
451 | } |
452 | return 0; | |
453 | } | |
454 | ||
a66c7b2f | 455 | static int punch_hole(struct inode *inode, loff_t offset, loff_t len) |
fbfa2cc5 JK |
456 | { |
457 | pgoff_t pg_start, pg_end; | |
458 | loff_t off_start, off_end; | |
459 | int ret = 0; | |
460 | ||
9e09fc85 | 461 | ret = f2fs_convert_inline_data(inode, MAX_INLINE_DATA + 1); |
8230a0a4 JK |
462 | if (ret) |
463 | return ret; | |
9ffe0fb5 | 464 | |
fbfa2cc5 JK |
465 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; |
466 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
467 | ||
468 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
469 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
470 | ||
471 | if (pg_start == pg_end) { | |
472 | fill_zero(inode, pg_start, off_start, | |
473 | off_end - off_start); | |
474 | } else { | |
475 | if (off_start) | |
476 | fill_zero(inode, pg_start++, off_start, | |
477 | PAGE_CACHE_SIZE - off_start); | |
478 | if (off_end) | |
479 | fill_zero(inode, pg_end, 0, off_end); | |
480 | ||
481 | if (pg_start < pg_end) { | |
482 | struct address_space *mapping = inode->i_mapping; | |
483 | loff_t blk_start, blk_end; | |
1127a3d4 JH |
484 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
485 | ||
486 | f2fs_balance_fs(sbi); | |
fbfa2cc5 JK |
487 | |
488 | blk_start = pg_start << PAGE_CACHE_SHIFT; | |
489 | blk_end = pg_end << PAGE_CACHE_SHIFT; | |
490 | truncate_inode_pages_range(mapping, blk_start, | |
491 | blk_end - 1); | |
39936837 | 492 | |
e479556b | 493 | f2fs_lock_op(sbi); |
fbfa2cc5 | 494 | ret = truncate_hole(inode, pg_start, pg_end); |
e479556b | 495 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
496 | } |
497 | } | |
498 | ||
fbfa2cc5 JK |
499 | return ret; |
500 | } | |
501 | ||
502 | static int expand_inode_data(struct inode *inode, loff_t offset, | |
503 | loff_t len, int mode) | |
504 | { | |
505 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
506 | pgoff_t index, pg_start, pg_end; | |
507 | loff_t new_size = i_size_read(inode); | |
508 | loff_t off_start, off_end; | |
509 | int ret = 0; | |
510 | ||
511 | ret = inode_newsize_ok(inode, (len + offset)); | |
512 | if (ret) | |
513 | return ret; | |
514 | ||
9e09fc85 JK |
515 | ret = f2fs_convert_inline_data(inode, offset + len); |
516 | if (ret) | |
517 | return ret; | |
518 | ||
fbfa2cc5 JK |
519 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; |
520 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
521 | ||
522 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
523 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
524 | ||
525 | for (index = pg_start; index <= pg_end; index++) { | |
526 | struct dnode_of_data dn; | |
527 | ||
e479556b | 528 | f2fs_lock_op(sbi); |
fbfa2cc5 | 529 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
b600965c HL |
530 | ret = f2fs_reserve_block(&dn, index); |
531 | f2fs_unlock_op(sbi); | |
532 | if (ret) | |
fbfa2cc5 | 533 | break; |
fbfa2cc5 | 534 | |
fbfa2cc5 JK |
535 | if (pg_start == pg_end) |
536 | new_size = offset + len; | |
537 | else if (index == pg_start && off_start) | |
538 | new_size = (index + 1) << PAGE_CACHE_SHIFT; | |
539 | else if (index == pg_end) | |
540 | new_size = (index << PAGE_CACHE_SHIFT) + off_end; | |
541 | else | |
542 | new_size += PAGE_CACHE_SIZE; | |
543 | } | |
544 | ||
545 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
546 | i_size_read(inode) < new_size) { | |
547 | i_size_write(inode, new_size); | |
548 | mark_inode_dirty(inode); | |
549 | } | |
550 | ||
551 | return ret; | |
552 | } | |
553 | ||
554 | static long f2fs_fallocate(struct file *file, int mode, | |
555 | loff_t offset, loff_t len) | |
556 | { | |
6131ffaa | 557 | struct inode *inode = file_inode(file); |
fbfa2cc5 JK |
558 | long ret; |
559 | ||
560 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) | |
561 | return -EOPNOTSUPP; | |
562 | ||
563 | if (mode & FALLOC_FL_PUNCH_HOLE) | |
a66c7b2f | 564 | ret = punch_hole(inode, offset, len); |
fbfa2cc5 JK |
565 | else |
566 | ret = expand_inode_data(inode, offset, len, mode); | |
567 | ||
3af60a49 NJ |
568 | if (!ret) { |
569 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
570 | mark_inode_dirty(inode); | |
571 | } | |
c01e2853 | 572 | trace_f2fs_fallocate(inode, mode, offset, len, ret); |
fbfa2cc5 JK |
573 | return ret; |
574 | } | |
575 | ||
576 | #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL)) | |
577 | #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL) | |
578 | ||
579 | static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags) | |
580 | { | |
581 | if (S_ISDIR(mode)) | |
582 | return flags; | |
583 | else if (S_ISREG(mode)) | |
584 | return flags & F2FS_REG_FLMASK; | |
585 | else | |
586 | return flags & F2FS_OTHER_FLMASK; | |
587 | } | |
588 | ||
589 | long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
590 | { | |
6131ffaa | 591 | struct inode *inode = file_inode(filp); |
fbfa2cc5 JK |
592 | struct f2fs_inode_info *fi = F2FS_I(inode); |
593 | unsigned int flags; | |
594 | int ret; | |
595 | ||
596 | switch (cmd) { | |
6a3e8ef0 | 597 | case F2FS_IOC_GETFLAGS: |
fbfa2cc5 JK |
598 | flags = fi->i_flags & FS_FL_USER_VISIBLE; |
599 | return put_user(flags, (int __user *) arg); | |
6a3e8ef0 | 600 | case F2FS_IOC_SETFLAGS: |
fbfa2cc5 JK |
601 | { |
602 | unsigned int oldflags; | |
603 | ||
bdaec334 | 604 | ret = mnt_want_write_file(filp); |
fbfa2cc5 JK |
605 | if (ret) |
606 | return ret; | |
607 | ||
608 | if (!inode_owner_or_capable(inode)) { | |
609 | ret = -EACCES; | |
610 | goto out; | |
611 | } | |
612 | ||
613 | if (get_user(flags, (int __user *) arg)) { | |
614 | ret = -EFAULT; | |
615 | goto out; | |
616 | } | |
617 | ||
618 | flags = f2fs_mask_flags(inode->i_mode, flags); | |
619 | ||
620 | mutex_lock(&inode->i_mutex); | |
621 | ||
622 | oldflags = fi->i_flags; | |
623 | ||
624 | if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { | |
625 | if (!capable(CAP_LINUX_IMMUTABLE)) { | |
626 | mutex_unlock(&inode->i_mutex); | |
627 | ret = -EPERM; | |
628 | goto out; | |
629 | } | |
630 | } | |
631 | ||
632 | flags = flags & FS_FL_USER_MODIFIABLE; | |
633 | flags |= oldflags & ~FS_FL_USER_MODIFIABLE; | |
634 | fi->i_flags = flags; | |
635 | mutex_unlock(&inode->i_mutex); | |
636 | ||
637 | f2fs_set_inode_flags(inode); | |
638 | inode->i_ctime = CURRENT_TIME; | |
639 | mark_inode_dirty(inode); | |
640 | out: | |
bdaec334 | 641 | mnt_drop_write_file(filp); |
fbfa2cc5 JK |
642 | return ret; |
643 | } | |
644 | default: | |
645 | return -ENOTTY; | |
646 | } | |
647 | } | |
648 | ||
e9750824 NJ |
649 | #ifdef CONFIG_COMPAT |
650 | long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
651 | { | |
652 | switch (cmd) { | |
653 | case F2FS_IOC32_GETFLAGS: | |
654 | cmd = F2FS_IOC_GETFLAGS; | |
655 | break; | |
656 | case F2FS_IOC32_SETFLAGS: | |
657 | cmd = F2FS_IOC_SETFLAGS; | |
658 | break; | |
659 | default: | |
660 | return -ENOIOCTLCMD; | |
661 | } | |
662 | return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); | |
663 | } | |
664 | #endif | |
665 | ||
fbfa2cc5 JK |
666 | const struct file_operations f2fs_file_operations = { |
667 | .llseek = generic_file_llseek, | |
668 | .read = do_sync_read, | |
669 | .write = do_sync_write, | |
670 | .aio_read = generic_file_aio_read, | |
671 | .aio_write = generic_file_aio_write, | |
672 | .open = generic_file_open, | |
673 | .mmap = f2fs_file_mmap, | |
674 | .fsync = f2fs_sync_file, | |
675 | .fallocate = f2fs_fallocate, | |
676 | .unlocked_ioctl = f2fs_ioctl, | |
e9750824 NJ |
677 | #ifdef CONFIG_COMPAT |
678 | .compat_ioctl = f2fs_compat_ioctl, | |
679 | #endif | |
fbfa2cc5 JK |
680 | .splice_read = generic_file_splice_read, |
681 | .splice_write = generic_file_splice_write, | |
682 | }; |