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Commit | Line | Data |
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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> | |
7f7670fe | 22 | #include <linux/pagevec.h> |
fbfa2cc5 JK |
23 | |
24 | #include "f2fs.h" | |
25 | #include "node.h" | |
26 | #include "segment.h" | |
27 | #include "xattr.h" | |
28 | #include "acl.h" | |
a2a4a7e4 | 29 | #include <trace/events/f2fs.h> |
fbfa2cc5 JK |
30 | |
31 | static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma, | |
32 | struct vm_fault *vmf) | |
33 | { | |
34 | struct page *page = vmf->page; | |
6131ffaa | 35 | struct inode *inode = file_inode(vma->vm_file); |
4081363f | 36 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 | 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 | ||
b067ba1f JK |
44 | /* force to convert with normal data indices */ |
45 | err = f2fs_convert_inline_data(inode, MAX_INLINE_DATA + 1, page); | |
46 | if (err) | |
47 | goto out; | |
48 | ||
fbfa2cc5 | 49 | /* block allocation */ |
e479556b | 50 | f2fs_lock_op(sbi); |
fbfa2cc5 | 51 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
b600965c | 52 | err = f2fs_reserve_block(&dn, page->index); |
e479556b | 53 | f2fs_unlock_op(sbi); |
b600965c HL |
54 | if (err) |
55 | goto out; | |
fbfa2cc5 | 56 | |
9851e6e1 | 57 | file_update_time(vma->vm_file); |
fbfa2cc5 | 58 | lock_page(page); |
6bacf52f | 59 | if (unlikely(page->mapping != inode->i_mapping || |
9851e6e1 | 60 | page_offset(page) > i_size_read(inode) || |
6bacf52f | 61 | !PageUptodate(page))) { |
fbfa2cc5 JK |
62 | unlock_page(page); |
63 | err = -EFAULT; | |
64 | goto out; | |
65 | } | |
66 | ||
67 | /* | |
68 | * check to see if the page is mapped already (no holes) | |
69 | */ | |
70 | if (PageMappedToDisk(page)) | |
9851e6e1 | 71 | goto mapped; |
fbfa2cc5 JK |
72 | |
73 | /* page is wholly or partially inside EOF */ | |
74 | if (((page->index + 1) << PAGE_CACHE_SHIFT) > i_size_read(inode)) { | |
75 | unsigned offset; | |
76 | offset = i_size_read(inode) & ~PAGE_CACHE_MASK; | |
77 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
78 | } | |
79 | set_page_dirty(page); | |
80 | SetPageUptodate(page); | |
81 | ||
e943a10d | 82 | trace_f2fs_vm_page_mkwrite(page, DATA); |
9851e6e1 NJ |
83 | mapped: |
84 | /* fill the page */ | |
3cb5ad15 | 85 | f2fs_wait_on_page_writeback(page, DATA); |
fbfa2cc5 JK |
86 | out: |
87 | sb_end_pagefault(inode->i_sb); | |
88 | return block_page_mkwrite_return(err); | |
89 | } | |
90 | ||
91 | static const struct vm_operations_struct f2fs_file_vm_ops = { | |
692bb55d | 92 | .fault = filemap_fault, |
f1820361 | 93 | .map_pages = filemap_map_pages, |
692bb55d JK |
94 | .page_mkwrite = f2fs_vm_page_mkwrite, |
95 | .remap_pages = generic_file_remap_pages, | |
fbfa2cc5 JK |
96 | }; |
97 | ||
354a3399 JK |
98 | static int get_parent_ino(struct inode *inode, nid_t *pino) |
99 | { | |
100 | struct dentry *dentry; | |
101 | ||
102 | inode = igrab(inode); | |
103 | dentry = d_find_any_alias(inode); | |
104 | iput(inode); | |
105 | if (!dentry) | |
106 | return 0; | |
107 | ||
f0947e5c JK |
108 | if (update_dent_inode(inode, &dentry->d_name)) { |
109 | dput(dentry); | |
110 | return 0; | |
111 | } | |
354a3399 | 112 | |
f0947e5c JK |
113 | *pino = parent_ino(dentry); |
114 | dput(dentry); | |
354a3399 JK |
115 | return 1; |
116 | } | |
117 | ||
9d1589ef CY |
118 | static inline bool need_do_checkpoint(struct inode *inode) |
119 | { | |
4081363f | 120 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
9d1589ef CY |
121 | bool need_cp = false; |
122 | ||
123 | if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1) | |
124 | need_cp = true; | |
125 | else if (file_wrong_pino(inode)) | |
126 | need_cp = true; | |
127 | else if (!space_for_roll_forward(sbi)) | |
128 | need_cp = true; | |
129 | else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino)) | |
130 | need_cp = true; | |
131 | else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi))) | |
132 | need_cp = true; | |
133 | ||
134 | return need_cp; | |
135 | } | |
136 | ||
fbfa2cc5 JK |
137 | int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) |
138 | { | |
139 | struct inode *inode = file->f_mapping->host; | |
d928bfbf | 140 | struct f2fs_inode_info *fi = F2FS_I(inode); |
4081363f | 141 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
2403c155 | 142 | nid_t ino = inode->i_ino; |
fbfa2cc5 JK |
143 | int ret = 0; |
144 | bool need_cp = false; | |
145 | struct writeback_control wbc = { | |
c81bf1c8 | 146 | .sync_mode = WB_SYNC_ALL, |
fbfa2cc5 JK |
147 | .nr_to_write = LONG_MAX, |
148 | .for_reclaim = 0, | |
149 | }; | |
150 | ||
6bacf52f | 151 | if (unlikely(f2fs_readonly(inode->i_sb))) |
1fa95b0b NJ |
152 | return 0; |
153 | ||
a2a4a7e4 | 154 | trace_f2fs_sync_file_enter(inode); |
ea1aa12c JK |
155 | |
156 | /* if fdatasync is triggered, let's do in-place-update */ | |
c1ce1b02 | 157 | if (get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks) |
ea1aa12c | 158 | set_inode_flag(fi, FI_NEED_IPU); |
fbfa2cc5 | 159 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
c1ce1b02 JK |
160 | clear_inode_flag(fi, FI_NEED_IPU); |
161 | ||
a2a4a7e4 NJ |
162 | if (ret) { |
163 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); | |
fbfa2cc5 | 164 | return ret; |
a2a4a7e4 | 165 | } |
fbfa2cc5 | 166 | |
6d99ba41 JK |
167 | /* |
168 | * if there is no written data, don't waste time to write recovery info. | |
169 | */ | |
170 | if (!is_inode_flag_set(fi, FI_APPEND_WRITE) && | |
2403c155 | 171 | !exist_written_data(sbi, ino, APPEND_INO)) { |
19c9c466 JK |
172 | struct page *i = find_get_page(NODE_MAPPING(sbi), ino); |
173 | ||
174 | /* But we need to avoid that there are some inode updates */ | |
175 | if ((i && PageDirty(i)) || need_inode_block_update(sbi, ino)) { | |
176 | f2fs_put_page(i, 0); | |
177 | goto go_write; | |
178 | } | |
179 | f2fs_put_page(i, 0); | |
180 | ||
6d99ba41 | 181 | if (is_inode_flag_set(fi, FI_UPDATE_WRITE) || |
2403c155 | 182 | exist_written_data(sbi, ino, UPDATE_INO)) |
6d99ba41 JK |
183 | goto flush_out; |
184 | goto out; | |
185 | } | |
19c9c466 | 186 | go_write: |
7d82db83 JK |
187 | /* guarantee free sections for fsync */ |
188 | f2fs_balance_fs(sbi); | |
189 | ||
e5d2385e JK |
190 | /* |
191 | * Both of fdatasync() and fsync() are able to be recovered from | |
192 | * sudden-power-off. | |
193 | */ | |
9d1589ef CY |
194 | down_read(&fi->i_sem); |
195 | need_cp = need_do_checkpoint(inode); | |
d928bfbf JK |
196 | up_read(&fi->i_sem); |
197 | ||
fbfa2cc5 | 198 | if (need_cp) { |
354a3399 JK |
199 | nid_t pino; |
200 | ||
fbfa2cc5 JK |
201 | /* all the dirty node pages should be flushed for POR */ |
202 | ret = f2fs_sync_fs(inode->i_sb, 1); | |
d928bfbf JK |
203 | |
204 | down_write(&fi->i_sem); | |
205 | F2FS_I(inode)->xattr_ver = 0; | |
354a3399 JK |
206 | if (file_wrong_pino(inode) && inode->i_nlink == 1 && |
207 | get_parent_ino(inode, &pino)) { | |
208 | F2FS_I(inode)->i_pino = pino; | |
209 | file_got_pino(inode); | |
d928bfbf | 210 | up_write(&fi->i_sem); |
354a3399 JK |
211 | mark_inode_dirty_sync(inode); |
212 | ret = f2fs_write_inode(inode, NULL); | |
213 | if (ret) | |
214 | goto out; | |
d928bfbf JK |
215 | } else { |
216 | up_write(&fi->i_sem); | |
354a3399 | 217 | } |
fbfa2cc5 | 218 | } else { |
88bd02c9 JK |
219 | sync_nodes: |
220 | sync_node_pages(sbi, ino, &wbc); | |
221 | ||
222 | if (need_inode_block_update(sbi, ino)) { | |
b3783873 | 223 | mark_inode_dirty_sync(inode); |
398b1ac5 JK |
224 | ret = f2fs_write_inode(inode, NULL); |
225 | if (ret) | |
226 | goto out; | |
88bd02c9 | 227 | goto sync_nodes; |
398b1ac5 | 228 | } |
88bd02c9 | 229 | |
2403c155 | 230 | ret = wait_on_node_pages_writeback(sbi, ino); |
cfe58f9d JK |
231 | if (ret) |
232 | goto out; | |
6d99ba41 JK |
233 | |
234 | /* once recovery info is written, don't need to tack this */ | |
2403c155 | 235 | remove_dirty_inode(sbi, ino, APPEND_INO); |
6d99ba41 JK |
236 | clear_inode_flag(fi, FI_APPEND_WRITE); |
237 | flush_out: | |
2403c155 | 238 | remove_dirty_inode(sbi, ino, UPDATE_INO); |
6d99ba41 | 239 | clear_inode_flag(fi, FI_UPDATE_WRITE); |
4081363f | 240 | ret = f2fs_issue_flush(F2FS_I_SB(inode)); |
fbfa2cc5 JK |
241 | } |
242 | out: | |
a2a4a7e4 | 243 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); |
fbfa2cc5 JK |
244 | return ret; |
245 | } | |
246 | ||
7f7670fe JK |
247 | static pgoff_t __get_first_dirty_index(struct address_space *mapping, |
248 | pgoff_t pgofs, int whence) | |
249 | { | |
250 | struct pagevec pvec; | |
251 | int nr_pages; | |
252 | ||
253 | if (whence != SEEK_DATA) | |
254 | return 0; | |
255 | ||
256 | /* find first dirty page index */ | |
257 | pagevec_init(&pvec, 0); | |
65b85ccc JK |
258 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs, |
259 | PAGECACHE_TAG_DIRTY, 1); | |
260 | pgofs = nr_pages ? pvec.pages[0]->index : LONG_MAX; | |
7f7670fe JK |
261 | pagevec_release(&pvec); |
262 | return pgofs; | |
263 | } | |
264 | ||
265 | static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs, | |
266 | int whence) | |
267 | { | |
268 | switch (whence) { | |
269 | case SEEK_DATA: | |
270 | if ((blkaddr == NEW_ADDR && dirty == pgofs) || | |
271 | (blkaddr != NEW_ADDR && blkaddr != NULL_ADDR)) | |
272 | return true; | |
273 | break; | |
274 | case SEEK_HOLE: | |
275 | if (blkaddr == NULL_ADDR) | |
276 | return true; | |
277 | break; | |
278 | } | |
279 | return false; | |
280 | } | |
281 | ||
267378d4 CY |
282 | static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence) |
283 | { | |
284 | struct inode *inode = file->f_mapping->host; | |
285 | loff_t maxbytes = inode->i_sb->s_maxbytes; | |
286 | struct dnode_of_data dn; | |
7f7670fe JK |
287 | pgoff_t pgofs, end_offset, dirty; |
288 | loff_t data_ofs = offset; | |
289 | loff_t isize; | |
267378d4 CY |
290 | int err = 0; |
291 | ||
292 | mutex_lock(&inode->i_mutex); | |
293 | ||
294 | isize = i_size_read(inode); | |
295 | if (offset >= isize) | |
296 | goto fail; | |
297 | ||
298 | /* handle inline data case */ | |
299 | if (f2fs_has_inline_data(inode)) { | |
300 | if (whence == SEEK_HOLE) | |
301 | data_ofs = isize; | |
302 | goto found; | |
303 | } | |
304 | ||
305 | pgofs = (pgoff_t)(offset >> PAGE_CACHE_SHIFT); | |
306 | ||
7f7670fe JK |
307 | dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence); |
308 | ||
267378d4 CY |
309 | for (; data_ofs < isize; data_ofs = pgofs << PAGE_CACHE_SHIFT) { |
310 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
311 | err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE_RA); | |
312 | if (err && err != -ENOENT) { | |
313 | goto fail; | |
314 | } else if (err == -ENOENT) { | |
e1c42045 | 315 | /* direct node does not exists */ |
267378d4 CY |
316 | if (whence == SEEK_DATA) { |
317 | pgofs = PGOFS_OF_NEXT_DNODE(pgofs, | |
318 | F2FS_I(inode)); | |
319 | continue; | |
320 | } else { | |
321 | goto found; | |
322 | } | |
323 | } | |
324 | ||
6b2920a5 | 325 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
267378d4 CY |
326 | |
327 | /* find data/hole in dnode block */ | |
328 | for (; dn.ofs_in_node < end_offset; | |
329 | dn.ofs_in_node++, pgofs++, | |
330 | data_ofs = pgofs << PAGE_CACHE_SHIFT) { | |
331 | block_t blkaddr; | |
332 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
333 | ||
7f7670fe | 334 | if (__found_offset(blkaddr, dirty, pgofs, whence)) { |
267378d4 CY |
335 | f2fs_put_dnode(&dn); |
336 | goto found; | |
337 | } | |
338 | } | |
339 | f2fs_put_dnode(&dn); | |
340 | } | |
341 | ||
342 | if (whence == SEEK_DATA) | |
343 | goto fail; | |
267378d4 | 344 | found: |
fe369bc8 JK |
345 | if (whence == SEEK_HOLE && data_ofs > isize) |
346 | data_ofs = isize; | |
267378d4 CY |
347 | mutex_unlock(&inode->i_mutex); |
348 | return vfs_setpos(file, data_ofs, maxbytes); | |
349 | fail: | |
350 | mutex_unlock(&inode->i_mutex); | |
351 | return -ENXIO; | |
352 | } | |
353 | ||
354 | static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence) | |
355 | { | |
356 | struct inode *inode = file->f_mapping->host; | |
357 | loff_t maxbytes = inode->i_sb->s_maxbytes; | |
358 | ||
359 | switch (whence) { | |
360 | case SEEK_SET: | |
361 | case SEEK_CUR: | |
362 | case SEEK_END: | |
363 | return generic_file_llseek_size(file, offset, whence, | |
364 | maxbytes, i_size_read(inode)); | |
365 | case SEEK_DATA: | |
366 | case SEEK_HOLE: | |
0b4c5afd JK |
367 | if (offset < 0) |
368 | return -ENXIO; | |
267378d4 CY |
369 | return f2fs_seek_block(file, offset, whence); |
370 | } | |
371 | ||
372 | return -EINVAL; | |
373 | } | |
374 | ||
fbfa2cc5 JK |
375 | static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma) |
376 | { | |
377 | file_accessed(file); | |
378 | vma->vm_ops = &f2fs_file_vm_ops; | |
379 | return 0; | |
380 | } | |
381 | ||
b292dcab | 382 | int truncate_data_blocks_range(struct dnode_of_data *dn, int count) |
fbfa2cc5 JK |
383 | { |
384 | int nr_free = 0, ofs = dn->ofs_in_node; | |
4081363f | 385 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
fbfa2cc5 JK |
386 | struct f2fs_node *raw_node; |
387 | __le32 *addr; | |
388 | ||
45590710 | 389 | raw_node = F2FS_NODE(dn->node_page); |
fbfa2cc5 JK |
390 | addr = blkaddr_in_node(raw_node) + ofs; |
391 | ||
6c311ec6 | 392 | for (; count > 0; count--, addr++, dn->ofs_in_node++) { |
fbfa2cc5 JK |
393 | block_t blkaddr = le32_to_cpu(*addr); |
394 | if (blkaddr == NULL_ADDR) | |
395 | continue; | |
396 | ||
397 | update_extent_cache(NULL_ADDR, dn); | |
398 | invalidate_blocks(sbi, blkaddr); | |
fbfa2cc5 JK |
399 | nr_free++; |
400 | } | |
401 | if (nr_free) { | |
d7cc950b | 402 | dec_valid_block_count(sbi, dn->inode, nr_free); |
fbfa2cc5 JK |
403 | set_page_dirty(dn->node_page); |
404 | sync_inode_page(dn); | |
405 | } | |
406 | dn->ofs_in_node = ofs; | |
51dd6249 NJ |
407 | |
408 | trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid, | |
409 | dn->ofs_in_node, nr_free); | |
fbfa2cc5 JK |
410 | return nr_free; |
411 | } | |
412 | ||
413 | void truncate_data_blocks(struct dnode_of_data *dn) | |
414 | { | |
415 | truncate_data_blocks_range(dn, ADDRS_PER_BLOCK); | |
416 | } | |
417 | ||
418 | static void truncate_partial_data_page(struct inode *inode, u64 from) | |
419 | { | |
420 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
421 | struct page *page; | |
422 | ||
8aa6f1c5 CY |
423 | if (f2fs_has_inline_data(inode)) |
424 | return truncate_inline_data(inode, from); | |
425 | ||
fbfa2cc5 JK |
426 | if (!offset) |
427 | return; | |
428 | ||
c718379b | 429 | page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, false); |
fbfa2cc5 JK |
430 | if (IS_ERR(page)) |
431 | return; | |
432 | ||
433 | lock_page(page); | |
ca0a81b3 CY |
434 | if (unlikely(!PageUptodate(page) || |
435 | page->mapping != inode->i_mapping)) | |
436 | goto out; | |
437 | ||
3cb5ad15 | 438 | f2fs_wait_on_page_writeback(page, DATA); |
fbfa2cc5 JK |
439 | zero_user(page, offset, PAGE_CACHE_SIZE - offset); |
440 | set_page_dirty(page); | |
ca0a81b3 CY |
441 | |
442 | out: | |
fbfa2cc5 JK |
443 | f2fs_put_page(page, 1); |
444 | } | |
445 | ||
764aa3e9 | 446 | int truncate_blocks(struct inode *inode, u64 from, bool lock) |
fbfa2cc5 | 447 | { |
4081363f | 448 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 JK |
449 | unsigned int blocksize = inode->i_sb->s_blocksize; |
450 | struct dnode_of_data dn; | |
451 | pgoff_t free_from; | |
9ffe0fb5 | 452 | int count = 0, err = 0; |
fbfa2cc5 | 453 | |
51dd6249 NJ |
454 | trace_f2fs_truncate_blocks_enter(inode, from); |
455 | ||
f185ff97 JK |
456 | if (f2fs_has_inline_data(inode)) |
457 | goto done; | |
458 | ||
fbfa2cc5 JK |
459 | free_from = (pgoff_t) |
460 | ((from + blocksize - 1) >> (sbi->log_blocksize)); | |
461 | ||
764aa3e9 JK |
462 | if (lock) |
463 | f2fs_lock_op(sbi); | |
9ffe0fb5 | 464 | |
fbfa2cc5 | 465 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 466 | err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE); |
fbfa2cc5 JK |
467 | if (err) { |
468 | if (err == -ENOENT) | |
469 | goto free_next; | |
764aa3e9 JK |
470 | if (lock) |
471 | f2fs_unlock_op(sbi); | |
51dd6249 | 472 | trace_f2fs_truncate_blocks_exit(inode, err); |
fbfa2cc5 JK |
473 | return err; |
474 | } | |
475 | ||
6403eb1f | 476 | count = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
fbfa2cc5 JK |
477 | |
478 | count -= dn.ofs_in_node; | |
9850cf4a | 479 | f2fs_bug_on(sbi, count < 0); |
39936837 | 480 | |
fbfa2cc5 JK |
481 | if (dn.ofs_in_node || IS_INODE(dn.node_page)) { |
482 | truncate_data_blocks_range(&dn, count); | |
483 | free_from += count; | |
484 | } | |
485 | ||
486 | f2fs_put_dnode(&dn); | |
487 | free_next: | |
488 | err = truncate_inode_blocks(inode, free_from); | |
764aa3e9 JK |
489 | if (lock) |
490 | f2fs_unlock_op(sbi); | |
f185ff97 | 491 | done: |
fbfa2cc5 JK |
492 | /* lastly zero out the first data page */ |
493 | truncate_partial_data_page(inode, from); | |
494 | ||
51dd6249 | 495 | trace_f2fs_truncate_blocks_exit(inode, err); |
fbfa2cc5 JK |
496 | return err; |
497 | } | |
498 | ||
499 | void f2fs_truncate(struct inode *inode) | |
500 | { | |
501 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
502 | S_ISLNK(inode->i_mode))) | |
503 | return; | |
504 | ||
51dd6249 NJ |
505 | trace_f2fs_truncate(inode); |
506 | ||
764aa3e9 | 507 | if (!truncate_blocks(inode, i_size_read(inode), true)) { |
fbfa2cc5 JK |
508 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
509 | mark_inode_dirty(inode); | |
510 | } | |
fbfa2cc5 JK |
511 | } |
512 | ||
2d4d9fb5 | 513 | int f2fs_getattr(struct vfsmount *mnt, |
fbfa2cc5 JK |
514 | struct dentry *dentry, struct kstat *stat) |
515 | { | |
516 | struct inode *inode = dentry->d_inode; | |
517 | generic_fillattr(inode, stat); | |
518 | stat->blocks <<= 3; | |
519 | return 0; | |
520 | } | |
521 | ||
522 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
523 | static void __setattr_copy(struct inode *inode, const struct iattr *attr) | |
524 | { | |
525 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
526 | unsigned int ia_valid = attr->ia_valid; | |
527 | ||
528 | if (ia_valid & ATTR_UID) | |
529 | inode->i_uid = attr->ia_uid; | |
530 | if (ia_valid & ATTR_GID) | |
531 | inode->i_gid = attr->ia_gid; | |
532 | if (ia_valid & ATTR_ATIME) | |
533 | inode->i_atime = timespec_trunc(attr->ia_atime, | |
534 | inode->i_sb->s_time_gran); | |
535 | if (ia_valid & ATTR_MTIME) | |
536 | inode->i_mtime = timespec_trunc(attr->ia_mtime, | |
537 | inode->i_sb->s_time_gran); | |
538 | if (ia_valid & ATTR_CTIME) | |
539 | inode->i_ctime = timespec_trunc(attr->ia_ctime, | |
540 | inode->i_sb->s_time_gran); | |
541 | if (ia_valid & ATTR_MODE) { | |
542 | umode_t mode = attr->ia_mode; | |
543 | ||
544 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
545 | mode &= ~S_ISGID; | |
546 | set_acl_inode(fi, mode); | |
547 | } | |
548 | } | |
549 | #else | |
550 | #define __setattr_copy setattr_copy | |
551 | #endif | |
552 | ||
553 | int f2fs_setattr(struct dentry *dentry, struct iattr *attr) | |
554 | { | |
555 | struct inode *inode = dentry->d_inode; | |
556 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
557 | int err; | |
558 | ||
559 | err = inode_change_ok(inode, attr); | |
560 | if (err) | |
561 | return err; | |
562 | ||
563 | if ((attr->ia_valid & ATTR_SIZE) && | |
564 | attr->ia_size != i_size_read(inode)) { | |
b067ba1f | 565 | err = f2fs_convert_inline_data(inode, attr->ia_size, NULL); |
9e09fc85 JK |
566 | if (err) |
567 | return err; | |
9ffe0fb5 | 568 | |
fbfa2cc5 | 569 | truncate_setsize(inode, attr->ia_size); |
9e09fc85 | 570 | f2fs_truncate(inode); |
4081363f | 571 | f2fs_balance_fs(F2FS_I_SB(inode)); |
fbfa2cc5 JK |
572 | } |
573 | ||
574 | __setattr_copy(inode, attr); | |
575 | ||
576 | if (attr->ia_valid & ATTR_MODE) { | |
a6dda0e6 | 577 | err = posix_acl_chmod(inode, get_inode_mode(inode)); |
fbfa2cc5 JK |
578 | if (err || is_inode_flag_set(fi, FI_ACL_MODE)) { |
579 | inode->i_mode = fi->i_acl_mode; | |
580 | clear_inode_flag(fi, FI_ACL_MODE); | |
581 | } | |
582 | } | |
583 | ||
584 | mark_inode_dirty(inode); | |
585 | return err; | |
586 | } | |
587 | ||
588 | const struct inode_operations f2fs_file_inode_operations = { | |
589 | .getattr = f2fs_getattr, | |
590 | .setattr = f2fs_setattr, | |
591 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 592 | .set_acl = f2fs_set_acl, |
fbfa2cc5 JK |
593 | #ifdef CONFIG_F2FS_FS_XATTR |
594 | .setxattr = generic_setxattr, | |
595 | .getxattr = generic_getxattr, | |
596 | .listxattr = f2fs_listxattr, | |
597 | .removexattr = generic_removexattr, | |
598 | #endif | |
9ab70134 | 599 | .fiemap = f2fs_fiemap, |
fbfa2cc5 JK |
600 | }; |
601 | ||
602 | static void fill_zero(struct inode *inode, pgoff_t index, | |
603 | loff_t start, loff_t len) | |
604 | { | |
4081363f | 605 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 JK |
606 | struct page *page; |
607 | ||
608 | if (!len) | |
609 | return; | |
610 | ||
bd43df02 JK |
611 | f2fs_balance_fs(sbi); |
612 | ||
e479556b | 613 | f2fs_lock_op(sbi); |
64aa7ed9 | 614 | page = get_new_data_page(inode, NULL, index, false); |
e479556b | 615 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
616 | |
617 | if (!IS_ERR(page)) { | |
3cb5ad15 | 618 | f2fs_wait_on_page_writeback(page, DATA); |
fbfa2cc5 JK |
619 | zero_user(page, start, len); |
620 | set_page_dirty(page); | |
621 | f2fs_put_page(page, 1); | |
622 | } | |
623 | } | |
624 | ||
625 | int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) | |
626 | { | |
627 | pgoff_t index; | |
628 | int err; | |
629 | ||
630 | for (index = pg_start; index < pg_end; index++) { | |
631 | struct dnode_of_data dn; | |
9eaeba70 | 632 | |
fbfa2cc5 | 633 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 634 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
fbfa2cc5 | 635 | if (err) { |
fbfa2cc5 JK |
636 | if (err == -ENOENT) |
637 | continue; | |
638 | return err; | |
639 | } | |
640 | ||
641 | if (dn.data_blkaddr != NULL_ADDR) | |
642 | truncate_data_blocks_range(&dn, 1); | |
643 | f2fs_put_dnode(&dn); | |
fbfa2cc5 JK |
644 | } |
645 | return 0; | |
646 | } | |
647 | ||
a66c7b2f | 648 | static int punch_hole(struct inode *inode, loff_t offset, loff_t len) |
fbfa2cc5 JK |
649 | { |
650 | pgoff_t pg_start, pg_end; | |
651 | loff_t off_start, off_end; | |
652 | int ret = 0; | |
653 | ||
b067ba1f | 654 | ret = f2fs_convert_inline_data(inode, MAX_INLINE_DATA + 1, NULL); |
8230a0a4 JK |
655 | if (ret) |
656 | return ret; | |
9ffe0fb5 | 657 | |
fbfa2cc5 JK |
658 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; |
659 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
660 | ||
661 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
662 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
663 | ||
664 | if (pg_start == pg_end) { | |
665 | fill_zero(inode, pg_start, off_start, | |
666 | off_end - off_start); | |
667 | } else { | |
668 | if (off_start) | |
669 | fill_zero(inode, pg_start++, off_start, | |
670 | PAGE_CACHE_SIZE - off_start); | |
671 | if (off_end) | |
672 | fill_zero(inode, pg_end, 0, off_end); | |
673 | ||
674 | if (pg_start < pg_end) { | |
675 | struct address_space *mapping = inode->i_mapping; | |
676 | loff_t blk_start, blk_end; | |
4081363f | 677 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
1127a3d4 JH |
678 | |
679 | f2fs_balance_fs(sbi); | |
fbfa2cc5 JK |
680 | |
681 | blk_start = pg_start << PAGE_CACHE_SHIFT; | |
682 | blk_end = pg_end << PAGE_CACHE_SHIFT; | |
683 | truncate_inode_pages_range(mapping, blk_start, | |
684 | blk_end - 1); | |
39936837 | 685 | |
e479556b | 686 | f2fs_lock_op(sbi); |
fbfa2cc5 | 687 | ret = truncate_hole(inode, pg_start, pg_end); |
e479556b | 688 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
689 | } |
690 | } | |
691 | ||
fbfa2cc5 JK |
692 | return ret; |
693 | } | |
694 | ||
695 | static int expand_inode_data(struct inode *inode, loff_t offset, | |
696 | loff_t len, int mode) | |
697 | { | |
4081363f | 698 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 JK |
699 | pgoff_t index, pg_start, pg_end; |
700 | loff_t new_size = i_size_read(inode); | |
701 | loff_t off_start, off_end; | |
702 | int ret = 0; | |
703 | ||
497a0930 CY |
704 | f2fs_balance_fs(sbi); |
705 | ||
fbfa2cc5 JK |
706 | ret = inode_newsize_ok(inode, (len + offset)); |
707 | if (ret) | |
708 | return ret; | |
709 | ||
b067ba1f | 710 | ret = f2fs_convert_inline_data(inode, offset + len, NULL); |
9e09fc85 JK |
711 | if (ret) |
712 | return ret; | |
713 | ||
fbfa2cc5 JK |
714 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; |
715 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
716 | ||
717 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
718 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
719 | ||
ead43275 JK |
720 | f2fs_lock_op(sbi); |
721 | ||
fbfa2cc5 JK |
722 | for (index = pg_start; index <= pg_end; index++) { |
723 | struct dnode_of_data dn; | |
724 | ||
98397ff3 JK |
725 | if (index == pg_end && !off_end) |
726 | goto noalloc; | |
727 | ||
fbfa2cc5 | 728 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
b600965c | 729 | ret = f2fs_reserve_block(&dn, index); |
b600965c | 730 | if (ret) |
fbfa2cc5 | 731 | break; |
98397ff3 | 732 | noalloc: |
fbfa2cc5 JK |
733 | if (pg_start == pg_end) |
734 | new_size = offset + len; | |
735 | else if (index == pg_start && off_start) | |
736 | new_size = (index + 1) << PAGE_CACHE_SHIFT; | |
737 | else if (index == pg_end) | |
738 | new_size = (index << PAGE_CACHE_SHIFT) + off_end; | |
739 | else | |
740 | new_size += PAGE_CACHE_SIZE; | |
741 | } | |
742 | ||
743 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
744 | i_size_read(inode) < new_size) { | |
745 | i_size_write(inode, new_size); | |
746 | mark_inode_dirty(inode); | |
ead43275 | 747 | update_inode_page(inode); |
fbfa2cc5 | 748 | } |
ead43275 | 749 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
750 | |
751 | return ret; | |
752 | } | |
753 | ||
754 | static long f2fs_fallocate(struct file *file, int mode, | |
755 | loff_t offset, loff_t len) | |
756 | { | |
6131ffaa | 757 | struct inode *inode = file_inode(file); |
fbfa2cc5 JK |
758 | long ret; |
759 | ||
760 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) | |
761 | return -EOPNOTSUPP; | |
762 | ||
3375f696 CY |
763 | mutex_lock(&inode->i_mutex); |
764 | ||
fbfa2cc5 | 765 | if (mode & FALLOC_FL_PUNCH_HOLE) |
a66c7b2f | 766 | ret = punch_hole(inode, offset, len); |
fbfa2cc5 JK |
767 | else |
768 | ret = expand_inode_data(inode, offset, len, mode); | |
769 | ||
3af60a49 NJ |
770 | if (!ret) { |
771 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
772 | mark_inode_dirty(inode); | |
773 | } | |
3375f696 CY |
774 | |
775 | mutex_unlock(&inode->i_mutex); | |
776 | ||
c01e2853 | 777 | trace_f2fs_fallocate(inode, mode, offset, len, ret); |
fbfa2cc5 JK |
778 | return ret; |
779 | } | |
780 | ||
781 | #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL)) | |
782 | #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL) | |
783 | ||
784 | static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags) | |
785 | { | |
786 | if (S_ISDIR(mode)) | |
787 | return flags; | |
788 | else if (S_ISREG(mode)) | |
789 | return flags & F2FS_REG_FLMASK; | |
790 | else | |
791 | return flags & F2FS_OTHER_FLMASK; | |
792 | } | |
793 | ||
794 | long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
795 | { | |
6131ffaa | 796 | struct inode *inode = file_inode(filp); |
fbfa2cc5 JK |
797 | struct f2fs_inode_info *fi = F2FS_I(inode); |
798 | unsigned int flags; | |
799 | int ret; | |
800 | ||
801 | switch (cmd) { | |
6a3e8ef0 | 802 | case F2FS_IOC_GETFLAGS: |
fbfa2cc5 JK |
803 | flags = fi->i_flags & FS_FL_USER_VISIBLE; |
804 | return put_user(flags, (int __user *) arg); | |
6a3e8ef0 | 805 | case F2FS_IOC_SETFLAGS: |
fbfa2cc5 JK |
806 | { |
807 | unsigned int oldflags; | |
808 | ||
bdaec334 | 809 | ret = mnt_want_write_file(filp); |
fbfa2cc5 JK |
810 | if (ret) |
811 | return ret; | |
812 | ||
813 | if (!inode_owner_or_capable(inode)) { | |
814 | ret = -EACCES; | |
815 | goto out; | |
816 | } | |
817 | ||
818 | if (get_user(flags, (int __user *) arg)) { | |
819 | ret = -EFAULT; | |
820 | goto out; | |
821 | } | |
822 | ||
823 | flags = f2fs_mask_flags(inode->i_mode, flags); | |
824 | ||
825 | mutex_lock(&inode->i_mutex); | |
826 | ||
827 | oldflags = fi->i_flags; | |
828 | ||
829 | if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { | |
830 | if (!capable(CAP_LINUX_IMMUTABLE)) { | |
831 | mutex_unlock(&inode->i_mutex); | |
832 | ret = -EPERM; | |
833 | goto out; | |
834 | } | |
835 | } | |
836 | ||
837 | flags = flags & FS_FL_USER_MODIFIABLE; | |
838 | flags |= oldflags & ~FS_FL_USER_MODIFIABLE; | |
839 | fi->i_flags = flags; | |
840 | mutex_unlock(&inode->i_mutex); | |
841 | ||
842 | f2fs_set_inode_flags(inode); | |
843 | inode->i_ctime = CURRENT_TIME; | |
844 | mark_inode_dirty(inode); | |
845 | out: | |
bdaec334 | 846 | mnt_drop_write_file(filp); |
fbfa2cc5 JK |
847 | return ret; |
848 | } | |
849 | default: | |
850 | return -ENOTTY; | |
851 | } | |
852 | } | |
853 | ||
e9750824 NJ |
854 | #ifdef CONFIG_COMPAT |
855 | long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
856 | { | |
857 | switch (cmd) { | |
858 | case F2FS_IOC32_GETFLAGS: | |
859 | cmd = F2FS_IOC_GETFLAGS; | |
860 | break; | |
861 | case F2FS_IOC32_SETFLAGS: | |
862 | cmd = F2FS_IOC_SETFLAGS; | |
863 | break; | |
864 | default: | |
865 | return -ENOIOCTLCMD; | |
866 | } | |
867 | return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); | |
868 | } | |
869 | #endif | |
870 | ||
fbfa2cc5 | 871 | const struct file_operations f2fs_file_operations = { |
267378d4 | 872 | .llseek = f2fs_llseek, |
aad4f8bb | 873 | .read = new_sync_read, |
8174202b | 874 | .write = new_sync_write, |
aad4f8bb | 875 | .read_iter = generic_file_read_iter, |
8174202b | 876 | .write_iter = generic_file_write_iter, |
fbfa2cc5 JK |
877 | .open = generic_file_open, |
878 | .mmap = f2fs_file_mmap, | |
879 | .fsync = f2fs_sync_file, | |
880 | .fallocate = f2fs_fallocate, | |
881 | .unlocked_ioctl = f2fs_ioctl, | |
e9750824 NJ |
882 | #ifdef CONFIG_COMPAT |
883 | .compat_ioctl = f2fs_compat_ioctl, | |
884 | #endif | |
fbfa2cc5 | 885 | .splice_read = generic_file_splice_read, |
8d020765 | 886 | .splice_write = iter_file_splice_write, |
fbfa2cc5 | 887 | }; |