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> | |
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); |
fbfa2cc5 | 36 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
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 | ||
fbfa2cc5 | 44 | /* block allocation */ |
e479556b | 45 | f2fs_lock_op(sbi); |
fbfa2cc5 | 46 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
b600965c | 47 | err = f2fs_reserve_block(&dn, page->index); |
e479556b | 48 | f2fs_unlock_op(sbi); |
b600965c HL |
49 | if (err) |
50 | goto out; | |
fbfa2cc5 | 51 | |
9851e6e1 | 52 | file_update_time(vma->vm_file); |
fbfa2cc5 | 53 | lock_page(page); |
6bacf52f | 54 | if (unlikely(page->mapping != inode->i_mapping || |
9851e6e1 | 55 | page_offset(page) > i_size_read(inode) || |
6bacf52f | 56 | !PageUptodate(page))) { |
fbfa2cc5 JK |
57 | unlock_page(page); |
58 | err = -EFAULT; | |
59 | goto out; | |
60 | } | |
61 | ||
62 | /* | |
63 | * check to see if the page is mapped already (no holes) | |
64 | */ | |
65 | if (PageMappedToDisk(page)) | |
9851e6e1 | 66 | goto mapped; |
fbfa2cc5 JK |
67 | |
68 | /* page is wholly or partially inside EOF */ | |
69 | if (((page->index + 1) << PAGE_CACHE_SHIFT) > i_size_read(inode)) { | |
70 | unsigned offset; | |
71 | offset = i_size_read(inode) & ~PAGE_CACHE_MASK; | |
72 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
73 | } | |
74 | set_page_dirty(page); | |
75 | SetPageUptodate(page); | |
76 | ||
e943a10d | 77 | trace_f2fs_vm_page_mkwrite(page, DATA); |
9851e6e1 NJ |
78 | mapped: |
79 | /* fill the page */ | |
3cb5ad15 | 80 | f2fs_wait_on_page_writeback(page, DATA); |
fbfa2cc5 JK |
81 | out: |
82 | sb_end_pagefault(inode->i_sb); | |
83 | return block_page_mkwrite_return(err); | |
84 | } | |
85 | ||
86 | static const struct vm_operations_struct f2fs_file_vm_ops = { | |
692bb55d | 87 | .fault = filemap_fault, |
f1820361 | 88 | .map_pages = filemap_map_pages, |
692bb55d JK |
89 | .page_mkwrite = f2fs_vm_page_mkwrite, |
90 | .remap_pages = generic_file_remap_pages, | |
fbfa2cc5 JK |
91 | }; |
92 | ||
354a3399 JK |
93 | static int get_parent_ino(struct inode *inode, nid_t *pino) |
94 | { | |
95 | struct dentry *dentry; | |
96 | ||
97 | inode = igrab(inode); | |
98 | dentry = d_find_any_alias(inode); | |
99 | iput(inode); | |
100 | if (!dentry) | |
101 | return 0; | |
102 | ||
f0947e5c JK |
103 | if (update_dent_inode(inode, &dentry->d_name)) { |
104 | dput(dentry); | |
105 | return 0; | |
106 | } | |
354a3399 | 107 | |
f0947e5c JK |
108 | *pino = parent_ino(dentry); |
109 | dput(dentry); | |
354a3399 JK |
110 | return 1; |
111 | } | |
112 | ||
fbfa2cc5 JK |
113 | int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) |
114 | { | |
115 | struct inode *inode = file->f_mapping->host; | |
d928bfbf | 116 | struct f2fs_inode_info *fi = F2FS_I(inode); |
fbfa2cc5 | 117 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
fbfa2cc5 JK |
118 | int ret = 0; |
119 | bool need_cp = false; | |
120 | struct writeback_control wbc = { | |
c81bf1c8 | 121 | .sync_mode = WB_SYNC_ALL, |
fbfa2cc5 JK |
122 | .nr_to_write = LONG_MAX, |
123 | .for_reclaim = 0, | |
124 | }; | |
125 | ||
6bacf52f | 126 | if (unlikely(f2fs_readonly(inode->i_sb))) |
1fa95b0b NJ |
127 | return 0; |
128 | ||
a2a4a7e4 | 129 | trace_f2fs_sync_file_enter(inode); |
fbfa2cc5 | 130 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
a2a4a7e4 NJ |
131 | if (ret) { |
132 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); | |
fbfa2cc5 | 133 | return ret; |
a2a4a7e4 | 134 | } |
fbfa2cc5 | 135 | |
6d99ba41 JK |
136 | /* |
137 | * if there is no written data, don't waste time to write recovery info. | |
138 | */ | |
139 | if (!is_inode_flag_set(fi, FI_APPEND_WRITE) && | |
140 | !exist_written_data(sbi, inode->i_ino, APPEND_INO)) { | |
141 | if (is_inode_flag_set(fi, FI_UPDATE_WRITE) || | |
142 | exist_written_data(sbi, inode->i_ino, UPDATE_INO)) | |
143 | goto flush_out; | |
144 | goto out; | |
145 | } | |
146 | ||
7d82db83 JK |
147 | /* guarantee free sections for fsync */ |
148 | f2fs_balance_fs(sbi); | |
149 | ||
d928bfbf | 150 | down_read(&fi->i_sem); |
fbfa2cc5 | 151 | |
e5d2385e JK |
152 | /* |
153 | * Both of fdatasync() and fsync() are able to be recovered from | |
154 | * sudden-power-off. | |
155 | */ | |
fbfa2cc5 JK |
156 | if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1) |
157 | need_cp = true; | |
354a3399 | 158 | else if (file_wrong_pino(inode)) |
fbfa2cc5 | 159 | need_cp = true; |
facb0205 | 160 | else if (!space_for_roll_forward(sbi)) |
fbfa2cc5 | 161 | need_cp = true; |
953a3e27 | 162 | else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino)) |
fbfa2cc5 | 163 | need_cp = true; |
d71b5564 | 164 | else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi))) |
e518ff81 | 165 | need_cp = true; |
fbfa2cc5 | 166 | |
d928bfbf JK |
167 | up_read(&fi->i_sem); |
168 | ||
fbfa2cc5 | 169 | if (need_cp) { |
354a3399 JK |
170 | nid_t pino; |
171 | ||
fbfa2cc5 JK |
172 | /* all the dirty node pages should be flushed for POR */ |
173 | ret = f2fs_sync_fs(inode->i_sb, 1); | |
d928bfbf JK |
174 | |
175 | down_write(&fi->i_sem); | |
176 | F2FS_I(inode)->xattr_ver = 0; | |
354a3399 JK |
177 | if (file_wrong_pino(inode) && inode->i_nlink == 1 && |
178 | get_parent_ino(inode, &pino)) { | |
179 | F2FS_I(inode)->i_pino = pino; | |
180 | file_got_pino(inode); | |
d928bfbf | 181 | up_write(&fi->i_sem); |
354a3399 JK |
182 | mark_inode_dirty_sync(inode); |
183 | ret = f2fs_write_inode(inode, NULL); | |
184 | if (ret) | |
185 | goto out; | |
d928bfbf JK |
186 | } else { |
187 | up_write(&fi->i_sem); | |
354a3399 | 188 | } |
fbfa2cc5 | 189 | } else { |
398b1ac5 JK |
190 | /* if there is no written node page, write its inode page */ |
191 | while (!sync_node_pages(sbi, inode->i_ino, &wbc)) { | |
479f40c4 JK |
192 | if (fsync_mark_done(sbi, inode->i_ino)) |
193 | goto out; | |
b3783873 | 194 | mark_inode_dirty_sync(inode); |
398b1ac5 JK |
195 | ret = f2fs_write_inode(inode, NULL); |
196 | if (ret) | |
197 | goto out; | |
198 | } | |
cfe58f9d JK |
199 | ret = wait_on_node_pages_writeback(sbi, inode->i_ino); |
200 | if (ret) | |
201 | goto out; | |
6d99ba41 JK |
202 | |
203 | /* once recovery info is written, don't need to tack this */ | |
204 | remove_dirty_inode(sbi, inode->i_ino, APPEND_INO); | |
205 | clear_inode_flag(fi, FI_APPEND_WRITE); | |
206 | flush_out: | |
207 | remove_dirty_inode(sbi, inode->i_ino, UPDATE_INO); | |
208 | clear_inode_flag(fi, FI_UPDATE_WRITE); | |
6b4afdd7 | 209 | ret = f2fs_issue_flush(F2FS_SB(inode->i_sb)); |
fbfa2cc5 JK |
210 | } |
211 | out: | |
a2a4a7e4 | 212 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); |
fbfa2cc5 JK |
213 | return ret; |
214 | } | |
215 | ||
7f7670fe JK |
216 | static pgoff_t __get_first_dirty_index(struct address_space *mapping, |
217 | pgoff_t pgofs, int whence) | |
218 | { | |
219 | struct pagevec pvec; | |
220 | int nr_pages; | |
221 | ||
222 | if (whence != SEEK_DATA) | |
223 | return 0; | |
224 | ||
225 | /* find first dirty page index */ | |
226 | pagevec_init(&pvec, 0); | |
227 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs, PAGECACHE_TAG_DIRTY, 1); | |
228 | pgofs = nr_pages ? pvec.pages[0]->index: LONG_MAX; | |
229 | pagevec_release(&pvec); | |
230 | return pgofs; | |
231 | } | |
232 | ||
233 | static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs, | |
234 | int whence) | |
235 | { | |
236 | switch (whence) { | |
237 | case SEEK_DATA: | |
238 | if ((blkaddr == NEW_ADDR && dirty == pgofs) || | |
239 | (blkaddr != NEW_ADDR && blkaddr != NULL_ADDR)) | |
240 | return true; | |
241 | break; | |
242 | case SEEK_HOLE: | |
243 | if (blkaddr == NULL_ADDR) | |
244 | return true; | |
245 | break; | |
246 | } | |
247 | return false; | |
248 | } | |
249 | ||
267378d4 CY |
250 | static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence) |
251 | { | |
252 | struct inode *inode = file->f_mapping->host; | |
253 | loff_t maxbytes = inode->i_sb->s_maxbytes; | |
254 | struct dnode_of_data dn; | |
7f7670fe JK |
255 | pgoff_t pgofs, end_offset, dirty; |
256 | loff_t data_ofs = offset; | |
257 | loff_t isize; | |
267378d4 CY |
258 | int err = 0; |
259 | ||
260 | mutex_lock(&inode->i_mutex); | |
261 | ||
262 | isize = i_size_read(inode); | |
263 | if (offset >= isize) | |
264 | goto fail; | |
265 | ||
266 | /* handle inline data case */ | |
267 | if (f2fs_has_inline_data(inode)) { | |
268 | if (whence == SEEK_HOLE) | |
269 | data_ofs = isize; | |
270 | goto found; | |
271 | } | |
272 | ||
273 | pgofs = (pgoff_t)(offset >> PAGE_CACHE_SHIFT); | |
274 | ||
7f7670fe JK |
275 | dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence); |
276 | ||
267378d4 CY |
277 | for (; data_ofs < isize; data_ofs = pgofs << PAGE_CACHE_SHIFT) { |
278 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
279 | err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE_RA); | |
280 | if (err && err != -ENOENT) { | |
281 | goto fail; | |
282 | } else if (err == -ENOENT) { | |
283 | /* direct node is not exist */ | |
284 | if (whence == SEEK_DATA) { | |
285 | pgofs = PGOFS_OF_NEXT_DNODE(pgofs, | |
286 | F2FS_I(inode)); | |
287 | continue; | |
288 | } else { | |
289 | goto found; | |
290 | } | |
291 | } | |
292 | ||
6b2920a5 | 293 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
267378d4 CY |
294 | |
295 | /* find data/hole in dnode block */ | |
296 | for (; dn.ofs_in_node < end_offset; | |
297 | dn.ofs_in_node++, pgofs++, | |
298 | data_ofs = pgofs << PAGE_CACHE_SHIFT) { | |
299 | block_t blkaddr; | |
300 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
301 | ||
7f7670fe | 302 | if (__found_offset(blkaddr, dirty, pgofs, whence)) { |
267378d4 CY |
303 | f2fs_put_dnode(&dn); |
304 | goto found; | |
305 | } | |
306 | } | |
307 | f2fs_put_dnode(&dn); | |
308 | } | |
309 | ||
310 | if (whence == SEEK_DATA) | |
311 | goto fail; | |
267378d4 | 312 | found: |
fe369bc8 JK |
313 | if (whence == SEEK_HOLE && data_ofs > isize) |
314 | data_ofs = isize; | |
267378d4 CY |
315 | mutex_unlock(&inode->i_mutex); |
316 | return vfs_setpos(file, data_ofs, maxbytes); | |
317 | fail: | |
318 | mutex_unlock(&inode->i_mutex); | |
319 | return -ENXIO; | |
320 | } | |
321 | ||
322 | static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence) | |
323 | { | |
324 | struct inode *inode = file->f_mapping->host; | |
325 | loff_t maxbytes = inode->i_sb->s_maxbytes; | |
326 | ||
327 | switch (whence) { | |
328 | case SEEK_SET: | |
329 | case SEEK_CUR: | |
330 | case SEEK_END: | |
331 | return generic_file_llseek_size(file, offset, whence, | |
332 | maxbytes, i_size_read(inode)); | |
333 | case SEEK_DATA: | |
334 | case SEEK_HOLE: | |
335 | return f2fs_seek_block(file, offset, whence); | |
336 | } | |
337 | ||
338 | return -EINVAL; | |
339 | } | |
340 | ||
fbfa2cc5 JK |
341 | static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma) |
342 | { | |
343 | file_accessed(file); | |
344 | vma->vm_ops = &f2fs_file_vm_ops; | |
345 | return 0; | |
346 | } | |
347 | ||
b292dcab | 348 | int truncate_data_blocks_range(struct dnode_of_data *dn, int count) |
fbfa2cc5 JK |
349 | { |
350 | int nr_free = 0, ofs = dn->ofs_in_node; | |
351 | struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); | |
352 | struct f2fs_node *raw_node; | |
353 | __le32 *addr; | |
354 | ||
45590710 | 355 | raw_node = F2FS_NODE(dn->node_page); |
fbfa2cc5 JK |
356 | addr = blkaddr_in_node(raw_node) + ofs; |
357 | ||
6c311ec6 | 358 | for (; count > 0; count--, addr++, dn->ofs_in_node++) { |
fbfa2cc5 JK |
359 | block_t blkaddr = le32_to_cpu(*addr); |
360 | if (blkaddr == NULL_ADDR) | |
361 | continue; | |
362 | ||
363 | update_extent_cache(NULL_ADDR, dn); | |
364 | invalidate_blocks(sbi, blkaddr); | |
fbfa2cc5 JK |
365 | nr_free++; |
366 | } | |
367 | if (nr_free) { | |
d7cc950b | 368 | dec_valid_block_count(sbi, dn->inode, nr_free); |
fbfa2cc5 JK |
369 | set_page_dirty(dn->node_page); |
370 | sync_inode_page(dn); | |
371 | } | |
372 | dn->ofs_in_node = ofs; | |
51dd6249 NJ |
373 | |
374 | trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid, | |
375 | dn->ofs_in_node, nr_free); | |
fbfa2cc5 JK |
376 | return nr_free; |
377 | } | |
378 | ||
379 | void truncate_data_blocks(struct dnode_of_data *dn) | |
380 | { | |
381 | truncate_data_blocks_range(dn, ADDRS_PER_BLOCK); | |
382 | } | |
383 | ||
384 | static void truncate_partial_data_page(struct inode *inode, u64 from) | |
385 | { | |
386 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
387 | struct page *page; | |
388 | ||
8aa6f1c5 CY |
389 | if (f2fs_has_inline_data(inode)) |
390 | return truncate_inline_data(inode, from); | |
391 | ||
fbfa2cc5 JK |
392 | if (!offset) |
393 | return; | |
394 | ||
c718379b | 395 | page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, false); |
fbfa2cc5 JK |
396 | if (IS_ERR(page)) |
397 | return; | |
398 | ||
399 | lock_page(page); | |
ca0a81b3 CY |
400 | if (unlikely(!PageUptodate(page) || |
401 | page->mapping != inode->i_mapping)) | |
402 | goto out; | |
403 | ||
3cb5ad15 | 404 | f2fs_wait_on_page_writeback(page, DATA); |
fbfa2cc5 JK |
405 | zero_user(page, offset, PAGE_CACHE_SIZE - offset); |
406 | set_page_dirty(page); | |
ca0a81b3 CY |
407 | |
408 | out: | |
fbfa2cc5 JK |
409 | f2fs_put_page(page, 1); |
410 | } | |
411 | ||
1e1bb4ba | 412 | int truncate_blocks(struct inode *inode, u64 from) |
fbfa2cc5 JK |
413 | { |
414 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
415 | unsigned int blocksize = inode->i_sb->s_blocksize; | |
416 | struct dnode_of_data dn; | |
417 | pgoff_t free_from; | |
9ffe0fb5 | 418 | int count = 0, err = 0; |
fbfa2cc5 | 419 | |
51dd6249 NJ |
420 | trace_f2fs_truncate_blocks_enter(inode, from); |
421 | ||
f185ff97 JK |
422 | if (f2fs_has_inline_data(inode)) |
423 | goto done; | |
424 | ||
fbfa2cc5 JK |
425 | free_from = (pgoff_t) |
426 | ((from + blocksize - 1) >> (sbi->log_blocksize)); | |
427 | ||
e479556b | 428 | f2fs_lock_op(sbi); |
9ffe0fb5 | 429 | |
fbfa2cc5 | 430 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 431 | err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE); |
fbfa2cc5 JK |
432 | if (err) { |
433 | if (err == -ENOENT) | |
434 | goto free_next; | |
e479556b | 435 | f2fs_unlock_op(sbi); |
51dd6249 | 436 | trace_f2fs_truncate_blocks_exit(inode, err); |
fbfa2cc5 JK |
437 | return err; |
438 | } | |
439 | ||
6403eb1f | 440 | count = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
fbfa2cc5 JK |
441 | |
442 | count -= dn.ofs_in_node; | |
5d56b671 | 443 | f2fs_bug_on(count < 0); |
39936837 | 444 | |
fbfa2cc5 JK |
445 | if (dn.ofs_in_node || IS_INODE(dn.node_page)) { |
446 | truncate_data_blocks_range(&dn, count); | |
447 | free_from += count; | |
448 | } | |
449 | ||
450 | f2fs_put_dnode(&dn); | |
451 | free_next: | |
452 | err = truncate_inode_blocks(inode, free_from); | |
e479556b | 453 | f2fs_unlock_op(sbi); |
f185ff97 | 454 | done: |
fbfa2cc5 JK |
455 | /* lastly zero out the first data page */ |
456 | truncate_partial_data_page(inode, from); | |
457 | ||
51dd6249 | 458 | trace_f2fs_truncate_blocks_exit(inode, err); |
fbfa2cc5 JK |
459 | return err; |
460 | } | |
461 | ||
462 | void f2fs_truncate(struct inode *inode) | |
463 | { | |
464 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
465 | S_ISLNK(inode->i_mode))) | |
466 | return; | |
467 | ||
51dd6249 NJ |
468 | trace_f2fs_truncate(inode); |
469 | ||
fbfa2cc5 JK |
470 | if (!truncate_blocks(inode, i_size_read(inode))) { |
471 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
472 | mark_inode_dirty(inode); | |
473 | } | |
fbfa2cc5 JK |
474 | } |
475 | ||
2d4d9fb5 | 476 | int f2fs_getattr(struct vfsmount *mnt, |
fbfa2cc5 JK |
477 | struct dentry *dentry, struct kstat *stat) |
478 | { | |
479 | struct inode *inode = dentry->d_inode; | |
480 | generic_fillattr(inode, stat); | |
481 | stat->blocks <<= 3; | |
482 | return 0; | |
483 | } | |
484 | ||
485 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
486 | static void __setattr_copy(struct inode *inode, const struct iattr *attr) | |
487 | { | |
488 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
489 | unsigned int ia_valid = attr->ia_valid; | |
490 | ||
491 | if (ia_valid & ATTR_UID) | |
492 | inode->i_uid = attr->ia_uid; | |
493 | if (ia_valid & ATTR_GID) | |
494 | inode->i_gid = attr->ia_gid; | |
495 | if (ia_valid & ATTR_ATIME) | |
496 | inode->i_atime = timespec_trunc(attr->ia_atime, | |
497 | inode->i_sb->s_time_gran); | |
498 | if (ia_valid & ATTR_MTIME) | |
499 | inode->i_mtime = timespec_trunc(attr->ia_mtime, | |
500 | inode->i_sb->s_time_gran); | |
501 | if (ia_valid & ATTR_CTIME) | |
502 | inode->i_ctime = timespec_trunc(attr->ia_ctime, | |
503 | inode->i_sb->s_time_gran); | |
504 | if (ia_valid & ATTR_MODE) { | |
505 | umode_t mode = attr->ia_mode; | |
506 | ||
507 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
508 | mode &= ~S_ISGID; | |
509 | set_acl_inode(fi, mode); | |
510 | } | |
511 | } | |
512 | #else | |
513 | #define __setattr_copy setattr_copy | |
514 | #endif | |
515 | ||
516 | int f2fs_setattr(struct dentry *dentry, struct iattr *attr) | |
517 | { | |
518 | struct inode *inode = dentry->d_inode; | |
519 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
520 | int err; | |
521 | ||
522 | err = inode_change_ok(inode, attr); | |
523 | if (err) | |
524 | return err; | |
525 | ||
526 | if ((attr->ia_valid & ATTR_SIZE) && | |
527 | attr->ia_size != i_size_read(inode)) { | |
9e09fc85 JK |
528 | err = f2fs_convert_inline_data(inode, attr->ia_size); |
529 | if (err) | |
530 | return err; | |
9ffe0fb5 | 531 | |
fbfa2cc5 | 532 | truncate_setsize(inode, attr->ia_size); |
9e09fc85 | 533 | f2fs_truncate(inode); |
d4686d56 | 534 | f2fs_balance_fs(F2FS_SB(inode->i_sb)); |
fbfa2cc5 JK |
535 | } |
536 | ||
537 | __setattr_copy(inode, attr); | |
538 | ||
539 | if (attr->ia_valid & ATTR_MODE) { | |
a6dda0e6 | 540 | err = posix_acl_chmod(inode, get_inode_mode(inode)); |
fbfa2cc5 JK |
541 | if (err || is_inode_flag_set(fi, FI_ACL_MODE)) { |
542 | inode->i_mode = fi->i_acl_mode; | |
543 | clear_inode_flag(fi, FI_ACL_MODE); | |
544 | } | |
545 | } | |
546 | ||
547 | mark_inode_dirty(inode); | |
548 | return err; | |
549 | } | |
550 | ||
551 | const struct inode_operations f2fs_file_inode_operations = { | |
552 | .getattr = f2fs_getattr, | |
553 | .setattr = f2fs_setattr, | |
554 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 555 | .set_acl = f2fs_set_acl, |
fbfa2cc5 JK |
556 | #ifdef CONFIG_F2FS_FS_XATTR |
557 | .setxattr = generic_setxattr, | |
558 | .getxattr = generic_getxattr, | |
559 | .listxattr = f2fs_listxattr, | |
560 | .removexattr = generic_removexattr, | |
561 | #endif | |
9ab70134 | 562 | .fiemap = f2fs_fiemap, |
fbfa2cc5 JK |
563 | }; |
564 | ||
565 | static void fill_zero(struct inode *inode, pgoff_t index, | |
566 | loff_t start, loff_t len) | |
567 | { | |
bd43df02 | 568 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
fbfa2cc5 JK |
569 | struct page *page; |
570 | ||
571 | if (!len) | |
572 | return; | |
573 | ||
bd43df02 JK |
574 | f2fs_balance_fs(sbi); |
575 | ||
e479556b | 576 | f2fs_lock_op(sbi); |
64aa7ed9 | 577 | page = get_new_data_page(inode, NULL, index, false); |
e479556b | 578 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
579 | |
580 | if (!IS_ERR(page)) { | |
3cb5ad15 | 581 | f2fs_wait_on_page_writeback(page, DATA); |
fbfa2cc5 JK |
582 | zero_user(page, start, len); |
583 | set_page_dirty(page); | |
584 | f2fs_put_page(page, 1); | |
585 | } | |
586 | } | |
587 | ||
588 | int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) | |
589 | { | |
590 | pgoff_t index; | |
591 | int err; | |
592 | ||
593 | for (index = pg_start; index < pg_end; index++) { | |
594 | struct dnode_of_data dn; | |
9eaeba70 | 595 | |
fbfa2cc5 | 596 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 597 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
fbfa2cc5 | 598 | if (err) { |
fbfa2cc5 JK |
599 | if (err == -ENOENT) |
600 | continue; | |
601 | return err; | |
602 | } | |
603 | ||
604 | if (dn.data_blkaddr != NULL_ADDR) | |
605 | truncate_data_blocks_range(&dn, 1); | |
606 | f2fs_put_dnode(&dn); | |
fbfa2cc5 JK |
607 | } |
608 | return 0; | |
609 | } | |
610 | ||
a66c7b2f | 611 | static int punch_hole(struct inode *inode, loff_t offset, loff_t len) |
fbfa2cc5 JK |
612 | { |
613 | pgoff_t pg_start, pg_end; | |
614 | loff_t off_start, off_end; | |
615 | int ret = 0; | |
616 | ||
9e09fc85 | 617 | ret = f2fs_convert_inline_data(inode, MAX_INLINE_DATA + 1); |
8230a0a4 JK |
618 | if (ret) |
619 | return ret; | |
9ffe0fb5 | 620 | |
fbfa2cc5 JK |
621 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; |
622 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
623 | ||
624 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
625 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
626 | ||
627 | if (pg_start == pg_end) { | |
628 | fill_zero(inode, pg_start, off_start, | |
629 | off_end - off_start); | |
630 | } else { | |
631 | if (off_start) | |
632 | fill_zero(inode, pg_start++, off_start, | |
633 | PAGE_CACHE_SIZE - off_start); | |
634 | if (off_end) | |
635 | fill_zero(inode, pg_end, 0, off_end); | |
636 | ||
637 | if (pg_start < pg_end) { | |
638 | struct address_space *mapping = inode->i_mapping; | |
639 | loff_t blk_start, blk_end; | |
1127a3d4 JH |
640 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
641 | ||
642 | f2fs_balance_fs(sbi); | |
fbfa2cc5 JK |
643 | |
644 | blk_start = pg_start << PAGE_CACHE_SHIFT; | |
645 | blk_end = pg_end << PAGE_CACHE_SHIFT; | |
646 | truncate_inode_pages_range(mapping, blk_start, | |
647 | blk_end - 1); | |
39936837 | 648 | |
e479556b | 649 | f2fs_lock_op(sbi); |
fbfa2cc5 | 650 | ret = truncate_hole(inode, pg_start, pg_end); |
e479556b | 651 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
652 | } |
653 | } | |
654 | ||
fbfa2cc5 JK |
655 | return ret; |
656 | } | |
657 | ||
658 | static int expand_inode_data(struct inode *inode, loff_t offset, | |
659 | loff_t len, int mode) | |
660 | { | |
661 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
662 | pgoff_t index, pg_start, pg_end; | |
663 | loff_t new_size = i_size_read(inode); | |
664 | loff_t off_start, off_end; | |
665 | int ret = 0; | |
666 | ||
667 | ret = inode_newsize_ok(inode, (len + offset)); | |
668 | if (ret) | |
669 | return ret; | |
670 | ||
9e09fc85 JK |
671 | ret = f2fs_convert_inline_data(inode, offset + len); |
672 | if (ret) | |
673 | return ret; | |
674 | ||
fbfa2cc5 JK |
675 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; |
676 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
677 | ||
678 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
679 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
680 | ||
ead43275 JK |
681 | f2fs_lock_op(sbi); |
682 | ||
fbfa2cc5 JK |
683 | for (index = pg_start; index <= pg_end; index++) { |
684 | struct dnode_of_data dn; | |
685 | ||
98397ff3 JK |
686 | if (index == pg_end && !off_end) |
687 | goto noalloc; | |
688 | ||
fbfa2cc5 | 689 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
b600965c | 690 | ret = f2fs_reserve_block(&dn, index); |
b600965c | 691 | if (ret) |
fbfa2cc5 | 692 | break; |
98397ff3 | 693 | noalloc: |
fbfa2cc5 JK |
694 | if (pg_start == pg_end) |
695 | new_size = offset + len; | |
696 | else if (index == pg_start && off_start) | |
697 | new_size = (index + 1) << PAGE_CACHE_SHIFT; | |
698 | else if (index == pg_end) | |
699 | new_size = (index << PAGE_CACHE_SHIFT) + off_end; | |
700 | else | |
701 | new_size += PAGE_CACHE_SIZE; | |
702 | } | |
703 | ||
704 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
705 | i_size_read(inode) < new_size) { | |
706 | i_size_write(inode, new_size); | |
707 | mark_inode_dirty(inode); | |
ead43275 | 708 | update_inode_page(inode); |
fbfa2cc5 | 709 | } |
ead43275 | 710 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
711 | |
712 | return ret; | |
713 | } | |
714 | ||
715 | static long f2fs_fallocate(struct file *file, int mode, | |
716 | loff_t offset, loff_t len) | |
717 | { | |
6131ffaa | 718 | struct inode *inode = file_inode(file); |
fbfa2cc5 JK |
719 | long ret; |
720 | ||
721 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) | |
722 | return -EOPNOTSUPP; | |
723 | ||
3375f696 CY |
724 | mutex_lock(&inode->i_mutex); |
725 | ||
fbfa2cc5 | 726 | if (mode & FALLOC_FL_PUNCH_HOLE) |
a66c7b2f | 727 | ret = punch_hole(inode, offset, len); |
fbfa2cc5 JK |
728 | else |
729 | ret = expand_inode_data(inode, offset, len, mode); | |
730 | ||
3af60a49 NJ |
731 | if (!ret) { |
732 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
733 | mark_inode_dirty(inode); | |
734 | } | |
3375f696 CY |
735 | |
736 | mutex_unlock(&inode->i_mutex); | |
737 | ||
c01e2853 | 738 | trace_f2fs_fallocate(inode, mode, offset, len, ret); |
fbfa2cc5 JK |
739 | return ret; |
740 | } | |
741 | ||
742 | #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL)) | |
743 | #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL) | |
744 | ||
745 | static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags) | |
746 | { | |
747 | if (S_ISDIR(mode)) | |
748 | return flags; | |
749 | else if (S_ISREG(mode)) | |
750 | return flags & F2FS_REG_FLMASK; | |
751 | else | |
752 | return flags & F2FS_OTHER_FLMASK; | |
753 | } | |
754 | ||
755 | long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
756 | { | |
6131ffaa | 757 | struct inode *inode = file_inode(filp); |
fbfa2cc5 JK |
758 | struct f2fs_inode_info *fi = F2FS_I(inode); |
759 | unsigned int flags; | |
760 | int ret; | |
761 | ||
762 | switch (cmd) { | |
6a3e8ef0 | 763 | case F2FS_IOC_GETFLAGS: |
fbfa2cc5 JK |
764 | flags = fi->i_flags & FS_FL_USER_VISIBLE; |
765 | return put_user(flags, (int __user *) arg); | |
6a3e8ef0 | 766 | case F2FS_IOC_SETFLAGS: |
fbfa2cc5 JK |
767 | { |
768 | unsigned int oldflags; | |
769 | ||
bdaec334 | 770 | ret = mnt_want_write_file(filp); |
fbfa2cc5 JK |
771 | if (ret) |
772 | return ret; | |
773 | ||
774 | if (!inode_owner_or_capable(inode)) { | |
775 | ret = -EACCES; | |
776 | goto out; | |
777 | } | |
778 | ||
779 | if (get_user(flags, (int __user *) arg)) { | |
780 | ret = -EFAULT; | |
781 | goto out; | |
782 | } | |
783 | ||
784 | flags = f2fs_mask_flags(inode->i_mode, flags); | |
785 | ||
786 | mutex_lock(&inode->i_mutex); | |
787 | ||
788 | oldflags = fi->i_flags; | |
789 | ||
790 | if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { | |
791 | if (!capable(CAP_LINUX_IMMUTABLE)) { | |
792 | mutex_unlock(&inode->i_mutex); | |
793 | ret = -EPERM; | |
794 | goto out; | |
795 | } | |
796 | } | |
797 | ||
798 | flags = flags & FS_FL_USER_MODIFIABLE; | |
799 | flags |= oldflags & ~FS_FL_USER_MODIFIABLE; | |
800 | fi->i_flags = flags; | |
801 | mutex_unlock(&inode->i_mutex); | |
802 | ||
803 | f2fs_set_inode_flags(inode); | |
804 | inode->i_ctime = CURRENT_TIME; | |
805 | mark_inode_dirty(inode); | |
806 | out: | |
bdaec334 | 807 | mnt_drop_write_file(filp); |
fbfa2cc5 JK |
808 | return ret; |
809 | } | |
810 | default: | |
811 | return -ENOTTY; | |
812 | } | |
813 | } | |
814 | ||
e9750824 NJ |
815 | #ifdef CONFIG_COMPAT |
816 | long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
817 | { | |
818 | switch (cmd) { | |
819 | case F2FS_IOC32_GETFLAGS: | |
820 | cmd = F2FS_IOC_GETFLAGS; | |
821 | break; | |
822 | case F2FS_IOC32_SETFLAGS: | |
823 | cmd = F2FS_IOC_SETFLAGS; | |
824 | break; | |
825 | default: | |
826 | return -ENOIOCTLCMD; | |
827 | } | |
828 | return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); | |
829 | } | |
830 | #endif | |
831 | ||
fbfa2cc5 | 832 | const struct file_operations f2fs_file_operations = { |
267378d4 | 833 | .llseek = f2fs_llseek, |
aad4f8bb | 834 | .read = new_sync_read, |
8174202b | 835 | .write = new_sync_write, |
aad4f8bb | 836 | .read_iter = generic_file_read_iter, |
8174202b | 837 | .write_iter = generic_file_write_iter, |
fbfa2cc5 JK |
838 | .open = generic_file_open, |
839 | .mmap = f2fs_file_mmap, | |
840 | .fsync = f2fs_sync_file, | |
841 | .fallocate = f2fs_fallocate, | |
842 | .unlocked_ioctl = f2fs_ioctl, | |
e9750824 NJ |
843 | #ifdef CONFIG_COMPAT |
844 | .compat_ioctl = f2fs_compat_ioctl, | |
845 | #endif | |
fbfa2cc5 | 846 | .splice_read = generic_file_splice_read, |
8d020765 | 847 | .splice_write = iter_file_splice_write, |
fbfa2cc5 | 848 | }; |