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 */ | |
3cb5ad15 | 79 | f2fs_wait_on_page_writeback(page, DATA); |
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 | 86 | .fault = filemap_fault, |
f1820361 | 87 | .map_pages = filemap_map_pages, |
692bb55d JK |
88 | .page_mkwrite = f2fs_vm_page_mkwrite, |
89 | .remap_pages = generic_file_remap_pages, | |
fbfa2cc5 JK |
90 | }; |
91 | ||
354a3399 JK |
92 | static int get_parent_ino(struct inode *inode, nid_t *pino) |
93 | { | |
94 | struct dentry *dentry; | |
95 | ||
96 | inode = igrab(inode); | |
97 | dentry = d_find_any_alias(inode); | |
98 | iput(inode); | |
99 | if (!dentry) | |
100 | return 0; | |
101 | ||
f0947e5c JK |
102 | if (update_dent_inode(inode, &dentry->d_name)) { |
103 | dput(dentry); | |
104 | return 0; | |
105 | } | |
354a3399 | 106 | |
f0947e5c JK |
107 | *pino = parent_ino(dentry); |
108 | dput(dentry); | |
354a3399 JK |
109 | return 1; |
110 | } | |
111 | ||
fbfa2cc5 JK |
112 | int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) |
113 | { | |
114 | struct inode *inode = file->f_mapping->host; | |
d928bfbf | 115 | struct f2fs_inode_info *fi = F2FS_I(inode); |
fbfa2cc5 | 116 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
fbfa2cc5 JK |
117 | int ret = 0; |
118 | bool need_cp = false; | |
119 | struct writeback_control wbc = { | |
c81bf1c8 | 120 | .sync_mode = WB_SYNC_ALL, |
fbfa2cc5 JK |
121 | .nr_to_write = LONG_MAX, |
122 | .for_reclaim = 0, | |
123 | }; | |
124 | ||
6bacf52f | 125 | if (unlikely(f2fs_readonly(inode->i_sb))) |
1fa95b0b NJ |
126 | return 0; |
127 | ||
a2a4a7e4 | 128 | trace_f2fs_sync_file_enter(inode); |
fbfa2cc5 | 129 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
a2a4a7e4 NJ |
130 | if (ret) { |
131 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); | |
fbfa2cc5 | 132 | return ret; |
a2a4a7e4 | 133 | } |
fbfa2cc5 | 134 | |
7d82db83 JK |
135 | /* guarantee free sections for fsync */ |
136 | f2fs_balance_fs(sbi); | |
137 | ||
d928bfbf | 138 | down_read(&fi->i_sem); |
fbfa2cc5 | 139 | |
e5d2385e JK |
140 | /* |
141 | * Both of fdatasync() and fsync() are able to be recovered from | |
142 | * sudden-power-off. | |
143 | */ | |
fbfa2cc5 JK |
144 | if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1) |
145 | need_cp = true; | |
354a3399 | 146 | else if (file_wrong_pino(inode)) |
fbfa2cc5 | 147 | need_cp = true; |
facb0205 | 148 | else if (!space_for_roll_forward(sbi)) |
fbfa2cc5 | 149 | need_cp = true; |
953a3e27 | 150 | else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino)) |
fbfa2cc5 | 151 | need_cp = true; |
d71b5564 | 152 | else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi))) |
e518ff81 | 153 | need_cp = true; |
fbfa2cc5 | 154 | |
d928bfbf JK |
155 | up_read(&fi->i_sem); |
156 | ||
fbfa2cc5 | 157 | if (need_cp) { |
354a3399 JK |
158 | nid_t pino; |
159 | ||
fbfa2cc5 JK |
160 | /* all the dirty node pages should be flushed for POR */ |
161 | ret = f2fs_sync_fs(inode->i_sb, 1); | |
d928bfbf JK |
162 | |
163 | down_write(&fi->i_sem); | |
164 | F2FS_I(inode)->xattr_ver = 0; | |
354a3399 JK |
165 | if (file_wrong_pino(inode) && inode->i_nlink == 1 && |
166 | get_parent_ino(inode, &pino)) { | |
167 | F2FS_I(inode)->i_pino = pino; | |
168 | file_got_pino(inode); | |
d928bfbf | 169 | up_write(&fi->i_sem); |
354a3399 JK |
170 | mark_inode_dirty_sync(inode); |
171 | ret = f2fs_write_inode(inode, NULL); | |
172 | if (ret) | |
173 | goto out; | |
d928bfbf JK |
174 | } else { |
175 | up_write(&fi->i_sem); | |
354a3399 | 176 | } |
fbfa2cc5 | 177 | } else { |
398b1ac5 JK |
178 | /* if there is no written node page, write its inode page */ |
179 | while (!sync_node_pages(sbi, inode->i_ino, &wbc)) { | |
479f40c4 JK |
180 | if (fsync_mark_done(sbi, inode->i_ino)) |
181 | goto out; | |
b3783873 | 182 | mark_inode_dirty_sync(inode); |
398b1ac5 JK |
183 | ret = f2fs_write_inode(inode, NULL); |
184 | if (ret) | |
185 | goto out; | |
186 | } | |
cfe58f9d JK |
187 | ret = wait_on_node_pages_writeback(sbi, inode->i_ino); |
188 | if (ret) | |
189 | goto out; | |
6b4afdd7 | 190 | ret = f2fs_issue_flush(F2FS_SB(inode->i_sb)); |
fbfa2cc5 JK |
191 | } |
192 | out: | |
a2a4a7e4 | 193 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); |
fbfa2cc5 JK |
194 | return ret; |
195 | } | |
196 | ||
267378d4 CY |
197 | static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence) |
198 | { | |
199 | struct inode *inode = file->f_mapping->host; | |
200 | loff_t maxbytes = inode->i_sb->s_maxbytes; | |
201 | struct dnode_of_data dn; | |
202 | pgoff_t pgofs, end_offset; | |
203 | loff_t data_ofs = offset, isize; | |
204 | int err = 0; | |
205 | ||
206 | mutex_lock(&inode->i_mutex); | |
207 | ||
208 | isize = i_size_read(inode); | |
209 | if (offset >= isize) | |
210 | goto fail; | |
211 | ||
212 | /* handle inline data case */ | |
213 | if (f2fs_has_inline_data(inode)) { | |
214 | if (whence == SEEK_HOLE) | |
215 | data_ofs = isize; | |
216 | goto found; | |
217 | } | |
218 | ||
219 | pgofs = (pgoff_t)(offset >> PAGE_CACHE_SHIFT); | |
220 | ||
221 | for (; data_ofs < isize; data_ofs = pgofs << PAGE_CACHE_SHIFT) { | |
222 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
223 | err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE_RA); | |
224 | if (err && err != -ENOENT) { | |
225 | goto fail; | |
226 | } else if (err == -ENOENT) { | |
227 | /* direct node is not exist */ | |
228 | if (whence == SEEK_DATA) { | |
229 | pgofs = PGOFS_OF_NEXT_DNODE(pgofs, | |
230 | F2FS_I(inode)); | |
231 | continue; | |
232 | } else { | |
233 | goto found; | |
234 | } | |
235 | } | |
236 | ||
237 | end_offset = IS_INODE(dn.node_page) ? | |
238 | ADDRS_PER_INODE(F2FS_I(inode)) : ADDRS_PER_BLOCK; | |
239 | ||
240 | /* find data/hole in dnode block */ | |
241 | for (; dn.ofs_in_node < end_offset; | |
242 | dn.ofs_in_node++, pgofs++, | |
243 | data_ofs = pgofs << PAGE_CACHE_SHIFT) { | |
244 | block_t blkaddr; | |
245 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
246 | ||
247 | if ((whence == SEEK_DATA && blkaddr != NULL_ADDR) || | |
248 | (whence == SEEK_HOLE && blkaddr == NULL_ADDR)) { | |
249 | f2fs_put_dnode(&dn); | |
250 | goto found; | |
251 | } | |
252 | } | |
253 | f2fs_put_dnode(&dn); | |
254 | } | |
255 | ||
256 | if (whence == SEEK_DATA) | |
257 | goto fail; | |
267378d4 | 258 | found: |
fe369bc8 JK |
259 | if (whence == SEEK_HOLE && data_ofs > isize) |
260 | data_ofs = isize; | |
267378d4 CY |
261 | mutex_unlock(&inode->i_mutex); |
262 | return vfs_setpos(file, data_ofs, maxbytes); | |
263 | fail: | |
264 | mutex_unlock(&inode->i_mutex); | |
265 | return -ENXIO; | |
266 | } | |
267 | ||
268 | static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence) | |
269 | { | |
270 | struct inode *inode = file->f_mapping->host; | |
271 | loff_t maxbytes = inode->i_sb->s_maxbytes; | |
272 | ||
273 | switch (whence) { | |
274 | case SEEK_SET: | |
275 | case SEEK_CUR: | |
276 | case SEEK_END: | |
277 | return generic_file_llseek_size(file, offset, whence, | |
278 | maxbytes, i_size_read(inode)); | |
279 | case SEEK_DATA: | |
280 | case SEEK_HOLE: | |
281 | return f2fs_seek_block(file, offset, whence); | |
282 | } | |
283 | ||
284 | return -EINVAL; | |
285 | } | |
286 | ||
fbfa2cc5 JK |
287 | static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma) |
288 | { | |
289 | file_accessed(file); | |
290 | vma->vm_ops = &f2fs_file_vm_ops; | |
291 | return 0; | |
292 | } | |
293 | ||
b292dcab | 294 | int truncate_data_blocks_range(struct dnode_of_data *dn, int count) |
fbfa2cc5 JK |
295 | { |
296 | int nr_free = 0, ofs = dn->ofs_in_node; | |
297 | struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); | |
298 | struct f2fs_node *raw_node; | |
299 | __le32 *addr; | |
300 | ||
45590710 | 301 | raw_node = F2FS_NODE(dn->node_page); |
fbfa2cc5 JK |
302 | addr = blkaddr_in_node(raw_node) + ofs; |
303 | ||
6c311ec6 | 304 | for (; count > 0; count--, addr++, dn->ofs_in_node++) { |
fbfa2cc5 JK |
305 | block_t blkaddr = le32_to_cpu(*addr); |
306 | if (blkaddr == NULL_ADDR) | |
307 | continue; | |
308 | ||
309 | update_extent_cache(NULL_ADDR, dn); | |
310 | invalidate_blocks(sbi, blkaddr); | |
fbfa2cc5 JK |
311 | nr_free++; |
312 | } | |
313 | if (nr_free) { | |
d7cc950b | 314 | dec_valid_block_count(sbi, dn->inode, nr_free); |
fbfa2cc5 JK |
315 | set_page_dirty(dn->node_page); |
316 | sync_inode_page(dn); | |
317 | } | |
318 | dn->ofs_in_node = ofs; | |
51dd6249 NJ |
319 | |
320 | trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid, | |
321 | dn->ofs_in_node, nr_free); | |
fbfa2cc5 JK |
322 | return nr_free; |
323 | } | |
324 | ||
325 | void truncate_data_blocks(struct dnode_of_data *dn) | |
326 | { | |
327 | truncate_data_blocks_range(dn, ADDRS_PER_BLOCK); | |
328 | } | |
329 | ||
330 | static void truncate_partial_data_page(struct inode *inode, u64 from) | |
331 | { | |
332 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
333 | struct page *page; | |
334 | ||
335 | if (!offset) | |
336 | return; | |
337 | ||
c718379b | 338 | page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, false); |
fbfa2cc5 JK |
339 | if (IS_ERR(page)) |
340 | return; | |
341 | ||
342 | lock_page(page); | |
6bacf52f | 343 | if (unlikely(page->mapping != inode->i_mapping)) { |
afcb7ca0 JK |
344 | f2fs_put_page(page, 1); |
345 | return; | |
346 | } | |
3cb5ad15 | 347 | f2fs_wait_on_page_writeback(page, DATA); |
fbfa2cc5 JK |
348 | zero_user(page, offset, PAGE_CACHE_SIZE - offset); |
349 | set_page_dirty(page); | |
350 | f2fs_put_page(page, 1); | |
351 | } | |
352 | ||
1e1bb4ba | 353 | int truncate_blocks(struct inode *inode, u64 from) |
fbfa2cc5 JK |
354 | { |
355 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
356 | unsigned int blocksize = inode->i_sb->s_blocksize; | |
357 | struct dnode_of_data dn; | |
358 | pgoff_t free_from; | |
9ffe0fb5 | 359 | int count = 0, err = 0; |
fbfa2cc5 | 360 | |
51dd6249 NJ |
361 | trace_f2fs_truncate_blocks_enter(inode, from); |
362 | ||
f185ff97 JK |
363 | if (f2fs_has_inline_data(inode)) |
364 | goto done; | |
365 | ||
fbfa2cc5 JK |
366 | free_from = (pgoff_t) |
367 | ((from + blocksize - 1) >> (sbi->log_blocksize)); | |
368 | ||
e479556b | 369 | f2fs_lock_op(sbi); |
9ffe0fb5 | 370 | |
fbfa2cc5 | 371 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 372 | err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE); |
fbfa2cc5 JK |
373 | if (err) { |
374 | if (err == -ENOENT) | |
375 | goto free_next; | |
e479556b | 376 | f2fs_unlock_op(sbi); |
51dd6249 | 377 | trace_f2fs_truncate_blocks_exit(inode, err); |
fbfa2cc5 JK |
378 | return err; |
379 | } | |
380 | ||
6403eb1f | 381 | count = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
fbfa2cc5 JK |
382 | |
383 | count -= dn.ofs_in_node; | |
5d56b671 | 384 | f2fs_bug_on(count < 0); |
39936837 | 385 | |
fbfa2cc5 JK |
386 | if (dn.ofs_in_node || IS_INODE(dn.node_page)) { |
387 | truncate_data_blocks_range(&dn, count); | |
388 | free_from += count; | |
389 | } | |
390 | ||
391 | f2fs_put_dnode(&dn); | |
392 | free_next: | |
393 | err = truncate_inode_blocks(inode, free_from); | |
e479556b | 394 | f2fs_unlock_op(sbi); |
f185ff97 | 395 | done: |
fbfa2cc5 JK |
396 | /* lastly zero out the first data page */ |
397 | truncate_partial_data_page(inode, from); | |
398 | ||
51dd6249 | 399 | trace_f2fs_truncate_blocks_exit(inode, err); |
fbfa2cc5 JK |
400 | return err; |
401 | } | |
402 | ||
403 | void f2fs_truncate(struct inode *inode) | |
404 | { | |
405 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
406 | S_ISLNK(inode->i_mode))) | |
407 | return; | |
408 | ||
51dd6249 NJ |
409 | trace_f2fs_truncate(inode); |
410 | ||
fbfa2cc5 JK |
411 | if (!truncate_blocks(inode, i_size_read(inode))) { |
412 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
413 | mark_inode_dirty(inode); | |
414 | } | |
fbfa2cc5 JK |
415 | } |
416 | ||
2d4d9fb5 | 417 | int f2fs_getattr(struct vfsmount *mnt, |
fbfa2cc5 JK |
418 | struct dentry *dentry, struct kstat *stat) |
419 | { | |
420 | struct inode *inode = dentry->d_inode; | |
421 | generic_fillattr(inode, stat); | |
422 | stat->blocks <<= 3; | |
423 | return 0; | |
424 | } | |
425 | ||
426 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
427 | static void __setattr_copy(struct inode *inode, const struct iattr *attr) | |
428 | { | |
429 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
430 | unsigned int ia_valid = attr->ia_valid; | |
431 | ||
432 | if (ia_valid & ATTR_UID) | |
433 | inode->i_uid = attr->ia_uid; | |
434 | if (ia_valid & ATTR_GID) | |
435 | inode->i_gid = attr->ia_gid; | |
436 | if (ia_valid & ATTR_ATIME) | |
437 | inode->i_atime = timespec_trunc(attr->ia_atime, | |
438 | inode->i_sb->s_time_gran); | |
439 | if (ia_valid & ATTR_MTIME) | |
440 | inode->i_mtime = timespec_trunc(attr->ia_mtime, | |
441 | inode->i_sb->s_time_gran); | |
442 | if (ia_valid & ATTR_CTIME) | |
443 | inode->i_ctime = timespec_trunc(attr->ia_ctime, | |
444 | inode->i_sb->s_time_gran); | |
445 | if (ia_valid & ATTR_MODE) { | |
446 | umode_t mode = attr->ia_mode; | |
447 | ||
448 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
449 | mode &= ~S_ISGID; | |
450 | set_acl_inode(fi, mode); | |
451 | } | |
452 | } | |
453 | #else | |
454 | #define __setattr_copy setattr_copy | |
455 | #endif | |
456 | ||
457 | int f2fs_setattr(struct dentry *dentry, struct iattr *attr) | |
458 | { | |
459 | struct inode *inode = dentry->d_inode; | |
460 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
461 | int err; | |
462 | ||
463 | err = inode_change_ok(inode, attr); | |
464 | if (err) | |
465 | return err; | |
466 | ||
467 | if ((attr->ia_valid & ATTR_SIZE) && | |
468 | attr->ia_size != i_size_read(inode)) { | |
9e09fc85 JK |
469 | err = f2fs_convert_inline_data(inode, attr->ia_size); |
470 | if (err) | |
471 | return err; | |
9ffe0fb5 | 472 | |
fbfa2cc5 | 473 | truncate_setsize(inode, attr->ia_size); |
9e09fc85 | 474 | f2fs_truncate(inode); |
d4686d56 | 475 | f2fs_balance_fs(F2FS_SB(inode->i_sb)); |
fbfa2cc5 JK |
476 | } |
477 | ||
478 | __setattr_copy(inode, attr); | |
479 | ||
480 | if (attr->ia_valid & ATTR_MODE) { | |
a6dda0e6 | 481 | err = posix_acl_chmod(inode, get_inode_mode(inode)); |
fbfa2cc5 JK |
482 | if (err || is_inode_flag_set(fi, FI_ACL_MODE)) { |
483 | inode->i_mode = fi->i_acl_mode; | |
484 | clear_inode_flag(fi, FI_ACL_MODE); | |
485 | } | |
486 | } | |
487 | ||
488 | mark_inode_dirty(inode); | |
489 | return err; | |
490 | } | |
491 | ||
492 | const struct inode_operations f2fs_file_inode_operations = { | |
493 | .getattr = f2fs_getattr, | |
494 | .setattr = f2fs_setattr, | |
495 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 496 | .set_acl = f2fs_set_acl, |
fbfa2cc5 JK |
497 | #ifdef CONFIG_F2FS_FS_XATTR |
498 | .setxattr = generic_setxattr, | |
499 | .getxattr = generic_getxattr, | |
500 | .listxattr = f2fs_listxattr, | |
501 | .removexattr = generic_removexattr, | |
502 | #endif | |
503 | }; | |
504 | ||
505 | static void fill_zero(struct inode *inode, pgoff_t index, | |
506 | loff_t start, loff_t len) | |
507 | { | |
bd43df02 | 508 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
fbfa2cc5 JK |
509 | struct page *page; |
510 | ||
511 | if (!len) | |
512 | return; | |
513 | ||
bd43df02 JK |
514 | f2fs_balance_fs(sbi); |
515 | ||
e479556b | 516 | f2fs_lock_op(sbi); |
64aa7ed9 | 517 | page = get_new_data_page(inode, NULL, index, false); |
e479556b | 518 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
519 | |
520 | if (!IS_ERR(page)) { | |
3cb5ad15 | 521 | f2fs_wait_on_page_writeback(page, DATA); |
fbfa2cc5 JK |
522 | zero_user(page, start, len); |
523 | set_page_dirty(page); | |
524 | f2fs_put_page(page, 1); | |
525 | } | |
526 | } | |
527 | ||
528 | int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) | |
529 | { | |
530 | pgoff_t index; | |
531 | int err; | |
532 | ||
533 | for (index = pg_start; index < pg_end; index++) { | |
534 | struct dnode_of_data dn; | |
9eaeba70 | 535 | |
fbfa2cc5 | 536 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 537 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
fbfa2cc5 | 538 | if (err) { |
fbfa2cc5 JK |
539 | if (err == -ENOENT) |
540 | continue; | |
541 | return err; | |
542 | } | |
543 | ||
544 | if (dn.data_blkaddr != NULL_ADDR) | |
545 | truncate_data_blocks_range(&dn, 1); | |
546 | f2fs_put_dnode(&dn); | |
fbfa2cc5 JK |
547 | } |
548 | return 0; | |
549 | } | |
550 | ||
a66c7b2f | 551 | static int punch_hole(struct inode *inode, loff_t offset, loff_t len) |
fbfa2cc5 JK |
552 | { |
553 | pgoff_t pg_start, pg_end; | |
554 | loff_t off_start, off_end; | |
555 | int ret = 0; | |
556 | ||
9e09fc85 | 557 | ret = f2fs_convert_inline_data(inode, MAX_INLINE_DATA + 1); |
8230a0a4 JK |
558 | if (ret) |
559 | return ret; | |
9ffe0fb5 | 560 | |
fbfa2cc5 JK |
561 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; |
562 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
563 | ||
564 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
565 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
566 | ||
567 | if (pg_start == pg_end) { | |
568 | fill_zero(inode, pg_start, off_start, | |
569 | off_end - off_start); | |
570 | } else { | |
571 | if (off_start) | |
572 | fill_zero(inode, pg_start++, off_start, | |
573 | PAGE_CACHE_SIZE - off_start); | |
574 | if (off_end) | |
575 | fill_zero(inode, pg_end, 0, off_end); | |
576 | ||
577 | if (pg_start < pg_end) { | |
578 | struct address_space *mapping = inode->i_mapping; | |
579 | loff_t blk_start, blk_end; | |
1127a3d4 JH |
580 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
581 | ||
582 | f2fs_balance_fs(sbi); | |
fbfa2cc5 JK |
583 | |
584 | blk_start = pg_start << PAGE_CACHE_SHIFT; | |
585 | blk_end = pg_end << PAGE_CACHE_SHIFT; | |
586 | truncate_inode_pages_range(mapping, blk_start, | |
587 | blk_end - 1); | |
39936837 | 588 | |
e479556b | 589 | f2fs_lock_op(sbi); |
fbfa2cc5 | 590 | ret = truncate_hole(inode, pg_start, pg_end); |
e479556b | 591 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
592 | } |
593 | } | |
594 | ||
fbfa2cc5 JK |
595 | return ret; |
596 | } | |
597 | ||
598 | static int expand_inode_data(struct inode *inode, loff_t offset, | |
599 | loff_t len, int mode) | |
600 | { | |
601 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
602 | pgoff_t index, pg_start, pg_end; | |
603 | loff_t new_size = i_size_read(inode); | |
604 | loff_t off_start, off_end; | |
605 | int ret = 0; | |
606 | ||
607 | ret = inode_newsize_ok(inode, (len + offset)); | |
608 | if (ret) | |
609 | return ret; | |
610 | ||
9e09fc85 JK |
611 | ret = f2fs_convert_inline_data(inode, offset + len); |
612 | if (ret) | |
613 | return ret; | |
614 | ||
fbfa2cc5 JK |
615 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; |
616 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
617 | ||
618 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
619 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
620 | ||
621 | for (index = pg_start; index <= pg_end; index++) { | |
622 | struct dnode_of_data dn; | |
623 | ||
e479556b | 624 | f2fs_lock_op(sbi); |
fbfa2cc5 | 625 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
b600965c HL |
626 | ret = f2fs_reserve_block(&dn, index); |
627 | f2fs_unlock_op(sbi); | |
628 | if (ret) | |
fbfa2cc5 | 629 | break; |
fbfa2cc5 | 630 | |
fbfa2cc5 JK |
631 | if (pg_start == pg_end) |
632 | new_size = offset + len; | |
633 | else if (index == pg_start && off_start) | |
634 | new_size = (index + 1) << PAGE_CACHE_SHIFT; | |
635 | else if (index == pg_end) | |
636 | new_size = (index << PAGE_CACHE_SHIFT) + off_end; | |
637 | else | |
638 | new_size += PAGE_CACHE_SIZE; | |
639 | } | |
640 | ||
641 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
642 | i_size_read(inode) < new_size) { | |
643 | i_size_write(inode, new_size); | |
644 | mark_inode_dirty(inode); | |
645 | } | |
646 | ||
647 | return ret; | |
648 | } | |
649 | ||
650 | static long f2fs_fallocate(struct file *file, int mode, | |
651 | loff_t offset, loff_t len) | |
652 | { | |
6131ffaa | 653 | struct inode *inode = file_inode(file); |
fbfa2cc5 JK |
654 | long ret; |
655 | ||
656 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) | |
657 | return -EOPNOTSUPP; | |
658 | ||
3375f696 CY |
659 | mutex_lock(&inode->i_mutex); |
660 | ||
fbfa2cc5 | 661 | if (mode & FALLOC_FL_PUNCH_HOLE) |
a66c7b2f | 662 | ret = punch_hole(inode, offset, len); |
fbfa2cc5 JK |
663 | else |
664 | ret = expand_inode_data(inode, offset, len, mode); | |
665 | ||
3af60a49 NJ |
666 | if (!ret) { |
667 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
668 | mark_inode_dirty(inode); | |
669 | } | |
3375f696 CY |
670 | |
671 | mutex_unlock(&inode->i_mutex); | |
672 | ||
c01e2853 | 673 | trace_f2fs_fallocate(inode, mode, offset, len, ret); |
fbfa2cc5 JK |
674 | return ret; |
675 | } | |
676 | ||
677 | #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL)) | |
678 | #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL) | |
679 | ||
680 | static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags) | |
681 | { | |
682 | if (S_ISDIR(mode)) | |
683 | return flags; | |
684 | else if (S_ISREG(mode)) | |
685 | return flags & F2FS_REG_FLMASK; | |
686 | else | |
687 | return flags & F2FS_OTHER_FLMASK; | |
688 | } | |
689 | ||
690 | long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
691 | { | |
6131ffaa | 692 | struct inode *inode = file_inode(filp); |
fbfa2cc5 JK |
693 | struct f2fs_inode_info *fi = F2FS_I(inode); |
694 | unsigned int flags; | |
695 | int ret; | |
696 | ||
697 | switch (cmd) { | |
6a3e8ef0 | 698 | case F2FS_IOC_GETFLAGS: |
fbfa2cc5 JK |
699 | flags = fi->i_flags & FS_FL_USER_VISIBLE; |
700 | return put_user(flags, (int __user *) arg); | |
6a3e8ef0 | 701 | case F2FS_IOC_SETFLAGS: |
fbfa2cc5 JK |
702 | { |
703 | unsigned int oldflags; | |
704 | ||
bdaec334 | 705 | ret = mnt_want_write_file(filp); |
fbfa2cc5 JK |
706 | if (ret) |
707 | return ret; | |
708 | ||
709 | if (!inode_owner_or_capable(inode)) { | |
710 | ret = -EACCES; | |
711 | goto out; | |
712 | } | |
713 | ||
714 | if (get_user(flags, (int __user *) arg)) { | |
715 | ret = -EFAULT; | |
716 | goto out; | |
717 | } | |
718 | ||
719 | flags = f2fs_mask_flags(inode->i_mode, flags); | |
720 | ||
721 | mutex_lock(&inode->i_mutex); | |
722 | ||
723 | oldflags = fi->i_flags; | |
724 | ||
725 | if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { | |
726 | if (!capable(CAP_LINUX_IMMUTABLE)) { | |
727 | mutex_unlock(&inode->i_mutex); | |
728 | ret = -EPERM; | |
729 | goto out; | |
730 | } | |
731 | } | |
732 | ||
733 | flags = flags & FS_FL_USER_MODIFIABLE; | |
734 | flags |= oldflags & ~FS_FL_USER_MODIFIABLE; | |
735 | fi->i_flags = flags; | |
736 | mutex_unlock(&inode->i_mutex); | |
737 | ||
738 | f2fs_set_inode_flags(inode); | |
739 | inode->i_ctime = CURRENT_TIME; | |
740 | mark_inode_dirty(inode); | |
741 | out: | |
bdaec334 | 742 | mnt_drop_write_file(filp); |
fbfa2cc5 JK |
743 | return ret; |
744 | } | |
745 | default: | |
746 | return -ENOTTY; | |
747 | } | |
748 | } | |
749 | ||
e9750824 NJ |
750 | #ifdef CONFIG_COMPAT |
751 | long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
752 | { | |
753 | switch (cmd) { | |
754 | case F2FS_IOC32_GETFLAGS: | |
755 | cmd = F2FS_IOC_GETFLAGS; | |
756 | break; | |
757 | case F2FS_IOC32_SETFLAGS: | |
758 | cmd = F2FS_IOC_SETFLAGS; | |
759 | break; | |
760 | default: | |
761 | return -ENOIOCTLCMD; | |
762 | } | |
763 | return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); | |
764 | } | |
765 | #endif | |
766 | ||
fbfa2cc5 | 767 | const struct file_operations f2fs_file_operations = { |
267378d4 | 768 | .llseek = f2fs_llseek, |
fbfa2cc5 JK |
769 | .read = do_sync_read, |
770 | .write = do_sync_write, | |
771 | .aio_read = generic_file_aio_read, | |
772 | .aio_write = generic_file_aio_write, | |
773 | .open = generic_file_open, | |
774 | .mmap = f2fs_file_mmap, | |
775 | .fsync = f2fs_sync_file, | |
776 | .fallocate = f2fs_fallocate, | |
777 | .unlocked_ioctl = f2fs_ioctl, | |
e9750824 NJ |
778 | #ifdef CONFIG_COMPAT |
779 | .compat_ioctl = f2fs_compat_ioctl, | |
780 | #endif | |
fbfa2cc5 JK |
781 | .splice_read = generic_file_splice_read, |
782 | .splice_write = generic_file_splice_write, | |
783 | }; |