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); |
ea1aa12c JK |
130 | |
131 | /* if fdatasync is triggered, let's do in-place-update */ | |
132 | if (datasync) | |
133 | set_inode_flag(fi, FI_NEED_IPU); | |
134 | ||
fbfa2cc5 | 135 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
ea1aa12c JK |
136 | if (datasync) |
137 | clear_inode_flag(fi, FI_NEED_IPU); | |
a2a4a7e4 NJ |
138 | if (ret) { |
139 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); | |
fbfa2cc5 | 140 | return ret; |
a2a4a7e4 | 141 | } |
fbfa2cc5 | 142 | |
6d99ba41 JK |
143 | /* |
144 | * if there is no written data, don't waste time to write recovery info. | |
145 | */ | |
146 | if (!is_inode_flag_set(fi, FI_APPEND_WRITE) && | |
147 | !exist_written_data(sbi, inode->i_ino, APPEND_INO)) { | |
148 | if (is_inode_flag_set(fi, FI_UPDATE_WRITE) || | |
149 | exist_written_data(sbi, inode->i_ino, UPDATE_INO)) | |
150 | goto flush_out; | |
151 | goto out; | |
152 | } | |
153 | ||
7d82db83 JK |
154 | /* guarantee free sections for fsync */ |
155 | f2fs_balance_fs(sbi); | |
156 | ||
d928bfbf | 157 | down_read(&fi->i_sem); |
fbfa2cc5 | 158 | |
e5d2385e JK |
159 | /* |
160 | * Both of fdatasync() and fsync() are able to be recovered from | |
161 | * sudden-power-off. | |
162 | */ | |
fbfa2cc5 JK |
163 | if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1) |
164 | need_cp = true; | |
354a3399 | 165 | else if (file_wrong_pino(inode)) |
fbfa2cc5 | 166 | need_cp = true; |
facb0205 | 167 | else if (!space_for_roll_forward(sbi)) |
fbfa2cc5 | 168 | need_cp = true; |
953a3e27 | 169 | else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino)) |
fbfa2cc5 | 170 | need_cp = true; |
d71b5564 | 171 | else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi))) |
e518ff81 | 172 | need_cp = true; |
fbfa2cc5 | 173 | |
d928bfbf JK |
174 | up_read(&fi->i_sem); |
175 | ||
fbfa2cc5 | 176 | if (need_cp) { |
354a3399 JK |
177 | nid_t pino; |
178 | ||
fbfa2cc5 JK |
179 | /* all the dirty node pages should be flushed for POR */ |
180 | ret = f2fs_sync_fs(inode->i_sb, 1); | |
d928bfbf JK |
181 | |
182 | down_write(&fi->i_sem); | |
183 | F2FS_I(inode)->xattr_ver = 0; | |
354a3399 JK |
184 | if (file_wrong_pino(inode) && inode->i_nlink == 1 && |
185 | get_parent_ino(inode, &pino)) { | |
186 | F2FS_I(inode)->i_pino = pino; | |
187 | file_got_pino(inode); | |
d928bfbf | 188 | up_write(&fi->i_sem); |
354a3399 JK |
189 | mark_inode_dirty_sync(inode); |
190 | ret = f2fs_write_inode(inode, NULL); | |
191 | if (ret) | |
192 | goto out; | |
d928bfbf JK |
193 | } else { |
194 | up_write(&fi->i_sem); | |
354a3399 | 195 | } |
fbfa2cc5 | 196 | } else { |
398b1ac5 JK |
197 | /* if there is no written node page, write its inode page */ |
198 | while (!sync_node_pages(sbi, inode->i_ino, &wbc)) { | |
479f40c4 JK |
199 | if (fsync_mark_done(sbi, inode->i_ino)) |
200 | goto out; | |
b3783873 | 201 | mark_inode_dirty_sync(inode); |
398b1ac5 JK |
202 | ret = f2fs_write_inode(inode, NULL); |
203 | if (ret) | |
204 | goto out; | |
205 | } | |
cfe58f9d JK |
206 | ret = wait_on_node_pages_writeback(sbi, inode->i_ino); |
207 | if (ret) | |
208 | goto out; | |
6d99ba41 JK |
209 | |
210 | /* once recovery info is written, don't need to tack this */ | |
211 | remove_dirty_inode(sbi, inode->i_ino, APPEND_INO); | |
212 | clear_inode_flag(fi, FI_APPEND_WRITE); | |
213 | flush_out: | |
214 | remove_dirty_inode(sbi, inode->i_ino, UPDATE_INO); | |
215 | clear_inode_flag(fi, FI_UPDATE_WRITE); | |
6b4afdd7 | 216 | ret = f2fs_issue_flush(F2FS_SB(inode->i_sb)); |
fbfa2cc5 JK |
217 | } |
218 | out: | |
a2a4a7e4 | 219 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); |
fbfa2cc5 JK |
220 | return ret; |
221 | } | |
222 | ||
7f7670fe JK |
223 | static pgoff_t __get_first_dirty_index(struct address_space *mapping, |
224 | pgoff_t pgofs, int whence) | |
225 | { | |
226 | struct pagevec pvec; | |
227 | int nr_pages; | |
228 | ||
229 | if (whence != SEEK_DATA) | |
230 | return 0; | |
231 | ||
232 | /* find first dirty page index */ | |
233 | pagevec_init(&pvec, 0); | |
234 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs, PAGECACHE_TAG_DIRTY, 1); | |
235 | pgofs = nr_pages ? pvec.pages[0]->index: LONG_MAX; | |
236 | pagevec_release(&pvec); | |
237 | return pgofs; | |
238 | } | |
239 | ||
240 | static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs, | |
241 | int whence) | |
242 | { | |
243 | switch (whence) { | |
244 | case SEEK_DATA: | |
245 | if ((blkaddr == NEW_ADDR && dirty == pgofs) || | |
246 | (blkaddr != NEW_ADDR && blkaddr != NULL_ADDR)) | |
247 | return true; | |
248 | break; | |
249 | case SEEK_HOLE: | |
250 | if (blkaddr == NULL_ADDR) | |
251 | return true; | |
252 | break; | |
253 | } | |
254 | return false; | |
255 | } | |
256 | ||
267378d4 CY |
257 | static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence) |
258 | { | |
259 | struct inode *inode = file->f_mapping->host; | |
260 | loff_t maxbytes = inode->i_sb->s_maxbytes; | |
261 | struct dnode_of_data dn; | |
7f7670fe JK |
262 | pgoff_t pgofs, end_offset, dirty; |
263 | loff_t data_ofs = offset; | |
264 | loff_t isize; | |
267378d4 CY |
265 | int err = 0; |
266 | ||
267 | mutex_lock(&inode->i_mutex); | |
268 | ||
269 | isize = i_size_read(inode); | |
270 | if (offset >= isize) | |
271 | goto fail; | |
272 | ||
273 | /* handle inline data case */ | |
274 | if (f2fs_has_inline_data(inode)) { | |
275 | if (whence == SEEK_HOLE) | |
276 | data_ofs = isize; | |
277 | goto found; | |
278 | } | |
279 | ||
280 | pgofs = (pgoff_t)(offset >> PAGE_CACHE_SHIFT); | |
281 | ||
7f7670fe JK |
282 | dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence); |
283 | ||
267378d4 CY |
284 | for (; data_ofs < isize; data_ofs = pgofs << PAGE_CACHE_SHIFT) { |
285 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
286 | err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE_RA); | |
287 | if (err && err != -ENOENT) { | |
288 | goto fail; | |
289 | } else if (err == -ENOENT) { | |
290 | /* direct node is not exist */ | |
291 | if (whence == SEEK_DATA) { | |
292 | pgofs = PGOFS_OF_NEXT_DNODE(pgofs, | |
293 | F2FS_I(inode)); | |
294 | continue; | |
295 | } else { | |
296 | goto found; | |
297 | } | |
298 | } | |
299 | ||
6b2920a5 | 300 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
267378d4 CY |
301 | |
302 | /* find data/hole in dnode block */ | |
303 | for (; dn.ofs_in_node < end_offset; | |
304 | dn.ofs_in_node++, pgofs++, | |
305 | data_ofs = pgofs << PAGE_CACHE_SHIFT) { | |
306 | block_t blkaddr; | |
307 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
308 | ||
7f7670fe | 309 | if (__found_offset(blkaddr, dirty, pgofs, whence)) { |
267378d4 CY |
310 | f2fs_put_dnode(&dn); |
311 | goto found; | |
312 | } | |
313 | } | |
314 | f2fs_put_dnode(&dn); | |
315 | } | |
316 | ||
317 | if (whence == SEEK_DATA) | |
318 | goto fail; | |
267378d4 | 319 | found: |
fe369bc8 JK |
320 | if (whence == SEEK_HOLE && data_ofs > isize) |
321 | data_ofs = isize; | |
267378d4 CY |
322 | mutex_unlock(&inode->i_mutex); |
323 | return vfs_setpos(file, data_ofs, maxbytes); | |
324 | fail: | |
325 | mutex_unlock(&inode->i_mutex); | |
326 | return -ENXIO; | |
327 | } | |
328 | ||
329 | static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence) | |
330 | { | |
331 | struct inode *inode = file->f_mapping->host; | |
332 | loff_t maxbytes = inode->i_sb->s_maxbytes; | |
333 | ||
334 | switch (whence) { | |
335 | case SEEK_SET: | |
336 | case SEEK_CUR: | |
337 | case SEEK_END: | |
338 | return generic_file_llseek_size(file, offset, whence, | |
339 | maxbytes, i_size_read(inode)); | |
340 | case SEEK_DATA: | |
341 | case SEEK_HOLE: | |
342 | return f2fs_seek_block(file, offset, whence); | |
343 | } | |
344 | ||
345 | return -EINVAL; | |
346 | } | |
347 | ||
fbfa2cc5 JK |
348 | static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma) |
349 | { | |
350 | file_accessed(file); | |
351 | vma->vm_ops = &f2fs_file_vm_ops; | |
352 | return 0; | |
353 | } | |
354 | ||
b292dcab | 355 | int truncate_data_blocks_range(struct dnode_of_data *dn, int count) |
fbfa2cc5 JK |
356 | { |
357 | int nr_free = 0, ofs = dn->ofs_in_node; | |
358 | struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); | |
359 | struct f2fs_node *raw_node; | |
360 | __le32 *addr; | |
361 | ||
45590710 | 362 | raw_node = F2FS_NODE(dn->node_page); |
fbfa2cc5 JK |
363 | addr = blkaddr_in_node(raw_node) + ofs; |
364 | ||
6c311ec6 | 365 | for (; count > 0; count--, addr++, dn->ofs_in_node++) { |
fbfa2cc5 JK |
366 | block_t blkaddr = le32_to_cpu(*addr); |
367 | if (blkaddr == NULL_ADDR) | |
368 | continue; | |
369 | ||
370 | update_extent_cache(NULL_ADDR, dn); | |
371 | invalidate_blocks(sbi, blkaddr); | |
fbfa2cc5 JK |
372 | nr_free++; |
373 | } | |
374 | if (nr_free) { | |
d7cc950b | 375 | dec_valid_block_count(sbi, dn->inode, nr_free); |
fbfa2cc5 JK |
376 | set_page_dirty(dn->node_page); |
377 | sync_inode_page(dn); | |
378 | } | |
379 | dn->ofs_in_node = ofs; | |
51dd6249 NJ |
380 | |
381 | trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid, | |
382 | dn->ofs_in_node, nr_free); | |
fbfa2cc5 JK |
383 | return nr_free; |
384 | } | |
385 | ||
386 | void truncate_data_blocks(struct dnode_of_data *dn) | |
387 | { | |
388 | truncate_data_blocks_range(dn, ADDRS_PER_BLOCK); | |
389 | } | |
390 | ||
391 | static void truncate_partial_data_page(struct inode *inode, u64 from) | |
392 | { | |
393 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
394 | struct page *page; | |
395 | ||
8aa6f1c5 CY |
396 | if (f2fs_has_inline_data(inode)) |
397 | return truncate_inline_data(inode, from); | |
398 | ||
fbfa2cc5 JK |
399 | if (!offset) |
400 | return; | |
401 | ||
c718379b | 402 | page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, false); |
fbfa2cc5 JK |
403 | if (IS_ERR(page)) |
404 | return; | |
405 | ||
406 | lock_page(page); | |
ca0a81b3 CY |
407 | if (unlikely(!PageUptodate(page) || |
408 | page->mapping != inode->i_mapping)) | |
409 | goto out; | |
410 | ||
3cb5ad15 | 411 | f2fs_wait_on_page_writeback(page, DATA); |
fbfa2cc5 JK |
412 | zero_user(page, offset, PAGE_CACHE_SIZE - offset); |
413 | set_page_dirty(page); | |
ca0a81b3 CY |
414 | |
415 | out: | |
fbfa2cc5 JK |
416 | f2fs_put_page(page, 1); |
417 | } | |
418 | ||
1e1bb4ba | 419 | int truncate_blocks(struct inode *inode, u64 from) |
fbfa2cc5 JK |
420 | { |
421 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
422 | unsigned int blocksize = inode->i_sb->s_blocksize; | |
423 | struct dnode_of_data dn; | |
424 | pgoff_t free_from; | |
9ffe0fb5 | 425 | int count = 0, err = 0; |
fbfa2cc5 | 426 | |
51dd6249 NJ |
427 | trace_f2fs_truncate_blocks_enter(inode, from); |
428 | ||
f185ff97 JK |
429 | if (f2fs_has_inline_data(inode)) |
430 | goto done; | |
431 | ||
fbfa2cc5 JK |
432 | free_from = (pgoff_t) |
433 | ((from + blocksize - 1) >> (sbi->log_blocksize)); | |
434 | ||
e479556b | 435 | f2fs_lock_op(sbi); |
9ffe0fb5 | 436 | |
fbfa2cc5 | 437 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 438 | err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE); |
fbfa2cc5 JK |
439 | if (err) { |
440 | if (err == -ENOENT) | |
441 | goto free_next; | |
e479556b | 442 | f2fs_unlock_op(sbi); |
51dd6249 | 443 | trace_f2fs_truncate_blocks_exit(inode, err); |
fbfa2cc5 JK |
444 | return err; |
445 | } | |
446 | ||
6403eb1f | 447 | count = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
fbfa2cc5 JK |
448 | |
449 | count -= dn.ofs_in_node; | |
5d56b671 | 450 | f2fs_bug_on(count < 0); |
39936837 | 451 | |
fbfa2cc5 JK |
452 | if (dn.ofs_in_node || IS_INODE(dn.node_page)) { |
453 | truncate_data_blocks_range(&dn, count); | |
454 | free_from += count; | |
455 | } | |
456 | ||
457 | f2fs_put_dnode(&dn); | |
458 | free_next: | |
459 | err = truncate_inode_blocks(inode, free_from); | |
e479556b | 460 | f2fs_unlock_op(sbi); |
f185ff97 | 461 | done: |
fbfa2cc5 JK |
462 | /* lastly zero out the first data page */ |
463 | truncate_partial_data_page(inode, from); | |
464 | ||
51dd6249 | 465 | trace_f2fs_truncate_blocks_exit(inode, err); |
fbfa2cc5 JK |
466 | return err; |
467 | } | |
468 | ||
469 | void f2fs_truncate(struct inode *inode) | |
470 | { | |
471 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
472 | S_ISLNK(inode->i_mode))) | |
473 | return; | |
474 | ||
51dd6249 NJ |
475 | trace_f2fs_truncate(inode); |
476 | ||
fbfa2cc5 JK |
477 | if (!truncate_blocks(inode, i_size_read(inode))) { |
478 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
479 | mark_inode_dirty(inode); | |
480 | } | |
fbfa2cc5 JK |
481 | } |
482 | ||
2d4d9fb5 | 483 | int f2fs_getattr(struct vfsmount *mnt, |
fbfa2cc5 JK |
484 | struct dentry *dentry, struct kstat *stat) |
485 | { | |
486 | struct inode *inode = dentry->d_inode; | |
487 | generic_fillattr(inode, stat); | |
488 | stat->blocks <<= 3; | |
489 | return 0; | |
490 | } | |
491 | ||
492 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
493 | static void __setattr_copy(struct inode *inode, const struct iattr *attr) | |
494 | { | |
495 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
496 | unsigned int ia_valid = attr->ia_valid; | |
497 | ||
498 | if (ia_valid & ATTR_UID) | |
499 | inode->i_uid = attr->ia_uid; | |
500 | if (ia_valid & ATTR_GID) | |
501 | inode->i_gid = attr->ia_gid; | |
502 | if (ia_valid & ATTR_ATIME) | |
503 | inode->i_atime = timespec_trunc(attr->ia_atime, | |
504 | inode->i_sb->s_time_gran); | |
505 | if (ia_valid & ATTR_MTIME) | |
506 | inode->i_mtime = timespec_trunc(attr->ia_mtime, | |
507 | inode->i_sb->s_time_gran); | |
508 | if (ia_valid & ATTR_CTIME) | |
509 | inode->i_ctime = timespec_trunc(attr->ia_ctime, | |
510 | inode->i_sb->s_time_gran); | |
511 | if (ia_valid & ATTR_MODE) { | |
512 | umode_t mode = attr->ia_mode; | |
513 | ||
514 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
515 | mode &= ~S_ISGID; | |
516 | set_acl_inode(fi, mode); | |
517 | } | |
518 | } | |
519 | #else | |
520 | #define __setattr_copy setattr_copy | |
521 | #endif | |
522 | ||
523 | int f2fs_setattr(struct dentry *dentry, struct iattr *attr) | |
524 | { | |
525 | struct inode *inode = dentry->d_inode; | |
526 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
527 | int err; | |
528 | ||
529 | err = inode_change_ok(inode, attr); | |
530 | if (err) | |
531 | return err; | |
532 | ||
533 | if ((attr->ia_valid & ATTR_SIZE) && | |
534 | attr->ia_size != i_size_read(inode)) { | |
9e09fc85 JK |
535 | err = f2fs_convert_inline_data(inode, attr->ia_size); |
536 | if (err) | |
537 | return err; | |
9ffe0fb5 | 538 | |
fbfa2cc5 | 539 | truncate_setsize(inode, attr->ia_size); |
9e09fc85 | 540 | f2fs_truncate(inode); |
d4686d56 | 541 | f2fs_balance_fs(F2FS_SB(inode->i_sb)); |
fbfa2cc5 JK |
542 | } |
543 | ||
544 | __setattr_copy(inode, attr); | |
545 | ||
546 | if (attr->ia_valid & ATTR_MODE) { | |
a6dda0e6 | 547 | err = posix_acl_chmod(inode, get_inode_mode(inode)); |
fbfa2cc5 JK |
548 | if (err || is_inode_flag_set(fi, FI_ACL_MODE)) { |
549 | inode->i_mode = fi->i_acl_mode; | |
550 | clear_inode_flag(fi, FI_ACL_MODE); | |
551 | } | |
552 | } | |
553 | ||
554 | mark_inode_dirty(inode); | |
555 | return err; | |
556 | } | |
557 | ||
558 | const struct inode_operations f2fs_file_inode_operations = { | |
559 | .getattr = f2fs_getattr, | |
560 | .setattr = f2fs_setattr, | |
561 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 562 | .set_acl = f2fs_set_acl, |
fbfa2cc5 JK |
563 | #ifdef CONFIG_F2FS_FS_XATTR |
564 | .setxattr = generic_setxattr, | |
565 | .getxattr = generic_getxattr, | |
566 | .listxattr = f2fs_listxattr, | |
567 | .removexattr = generic_removexattr, | |
568 | #endif | |
9ab70134 | 569 | .fiemap = f2fs_fiemap, |
fbfa2cc5 JK |
570 | }; |
571 | ||
572 | static void fill_zero(struct inode *inode, pgoff_t index, | |
573 | loff_t start, loff_t len) | |
574 | { | |
bd43df02 | 575 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
fbfa2cc5 JK |
576 | struct page *page; |
577 | ||
578 | if (!len) | |
579 | return; | |
580 | ||
bd43df02 JK |
581 | f2fs_balance_fs(sbi); |
582 | ||
e479556b | 583 | f2fs_lock_op(sbi); |
64aa7ed9 | 584 | page = get_new_data_page(inode, NULL, index, false); |
e479556b | 585 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
586 | |
587 | if (!IS_ERR(page)) { | |
3cb5ad15 | 588 | f2fs_wait_on_page_writeback(page, DATA); |
fbfa2cc5 JK |
589 | zero_user(page, start, len); |
590 | set_page_dirty(page); | |
591 | f2fs_put_page(page, 1); | |
592 | } | |
593 | } | |
594 | ||
595 | int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) | |
596 | { | |
597 | pgoff_t index; | |
598 | int err; | |
599 | ||
600 | for (index = pg_start; index < pg_end; index++) { | |
601 | struct dnode_of_data dn; | |
9eaeba70 | 602 | |
fbfa2cc5 | 603 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 604 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
fbfa2cc5 | 605 | if (err) { |
fbfa2cc5 JK |
606 | if (err == -ENOENT) |
607 | continue; | |
608 | return err; | |
609 | } | |
610 | ||
611 | if (dn.data_blkaddr != NULL_ADDR) | |
612 | truncate_data_blocks_range(&dn, 1); | |
613 | f2fs_put_dnode(&dn); | |
fbfa2cc5 JK |
614 | } |
615 | return 0; | |
616 | } | |
617 | ||
a66c7b2f | 618 | static int punch_hole(struct inode *inode, loff_t offset, loff_t len) |
fbfa2cc5 JK |
619 | { |
620 | pgoff_t pg_start, pg_end; | |
621 | loff_t off_start, off_end; | |
622 | int ret = 0; | |
623 | ||
9e09fc85 | 624 | ret = f2fs_convert_inline_data(inode, MAX_INLINE_DATA + 1); |
8230a0a4 JK |
625 | if (ret) |
626 | return ret; | |
9ffe0fb5 | 627 | |
fbfa2cc5 JK |
628 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; |
629 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
630 | ||
631 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
632 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
633 | ||
634 | if (pg_start == pg_end) { | |
635 | fill_zero(inode, pg_start, off_start, | |
636 | off_end - off_start); | |
637 | } else { | |
638 | if (off_start) | |
639 | fill_zero(inode, pg_start++, off_start, | |
640 | PAGE_CACHE_SIZE - off_start); | |
641 | if (off_end) | |
642 | fill_zero(inode, pg_end, 0, off_end); | |
643 | ||
644 | if (pg_start < pg_end) { | |
645 | struct address_space *mapping = inode->i_mapping; | |
646 | loff_t blk_start, blk_end; | |
1127a3d4 JH |
647 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
648 | ||
649 | f2fs_balance_fs(sbi); | |
fbfa2cc5 JK |
650 | |
651 | blk_start = pg_start << PAGE_CACHE_SHIFT; | |
652 | blk_end = pg_end << PAGE_CACHE_SHIFT; | |
653 | truncate_inode_pages_range(mapping, blk_start, | |
654 | blk_end - 1); | |
39936837 | 655 | |
e479556b | 656 | f2fs_lock_op(sbi); |
fbfa2cc5 | 657 | ret = truncate_hole(inode, pg_start, pg_end); |
e479556b | 658 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
659 | } |
660 | } | |
661 | ||
fbfa2cc5 JK |
662 | return ret; |
663 | } | |
664 | ||
665 | static int expand_inode_data(struct inode *inode, loff_t offset, | |
666 | loff_t len, int mode) | |
667 | { | |
668 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
669 | pgoff_t index, pg_start, pg_end; | |
670 | loff_t new_size = i_size_read(inode); | |
671 | loff_t off_start, off_end; | |
672 | int ret = 0; | |
673 | ||
674 | ret = inode_newsize_ok(inode, (len + offset)); | |
675 | if (ret) | |
676 | return ret; | |
677 | ||
9e09fc85 JK |
678 | ret = f2fs_convert_inline_data(inode, offset + len); |
679 | if (ret) | |
680 | return ret; | |
681 | ||
fbfa2cc5 JK |
682 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; |
683 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
684 | ||
685 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
686 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
687 | ||
ead43275 JK |
688 | f2fs_lock_op(sbi); |
689 | ||
fbfa2cc5 JK |
690 | for (index = pg_start; index <= pg_end; index++) { |
691 | struct dnode_of_data dn; | |
692 | ||
98397ff3 JK |
693 | if (index == pg_end && !off_end) |
694 | goto noalloc; | |
695 | ||
fbfa2cc5 | 696 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
b600965c | 697 | ret = f2fs_reserve_block(&dn, index); |
b600965c | 698 | if (ret) |
fbfa2cc5 | 699 | break; |
98397ff3 | 700 | noalloc: |
fbfa2cc5 JK |
701 | if (pg_start == pg_end) |
702 | new_size = offset + len; | |
703 | else if (index == pg_start && off_start) | |
704 | new_size = (index + 1) << PAGE_CACHE_SHIFT; | |
705 | else if (index == pg_end) | |
706 | new_size = (index << PAGE_CACHE_SHIFT) + off_end; | |
707 | else | |
708 | new_size += PAGE_CACHE_SIZE; | |
709 | } | |
710 | ||
711 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
712 | i_size_read(inode) < new_size) { | |
713 | i_size_write(inode, new_size); | |
714 | mark_inode_dirty(inode); | |
ead43275 | 715 | update_inode_page(inode); |
fbfa2cc5 | 716 | } |
ead43275 | 717 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
718 | |
719 | return ret; | |
720 | } | |
721 | ||
722 | static long f2fs_fallocate(struct file *file, int mode, | |
723 | loff_t offset, loff_t len) | |
724 | { | |
6131ffaa | 725 | struct inode *inode = file_inode(file); |
fbfa2cc5 JK |
726 | long ret; |
727 | ||
728 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) | |
729 | return -EOPNOTSUPP; | |
730 | ||
3375f696 CY |
731 | mutex_lock(&inode->i_mutex); |
732 | ||
fbfa2cc5 | 733 | if (mode & FALLOC_FL_PUNCH_HOLE) |
a66c7b2f | 734 | ret = punch_hole(inode, offset, len); |
fbfa2cc5 JK |
735 | else |
736 | ret = expand_inode_data(inode, offset, len, mode); | |
737 | ||
3af60a49 NJ |
738 | if (!ret) { |
739 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
740 | mark_inode_dirty(inode); | |
741 | } | |
3375f696 CY |
742 | |
743 | mutex_unlock(&inode->i_mutex); | |
744 | ||
c01e2853 | 745 | trace_f2fs_fallocate(inode, mode, offset, len, ret); |
fbfa2cc5 JK |
746 | return ret; |
747 | } | |
748 | ||
749 | #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL)) | |
750 | #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL) | |
751 | ||
752 | static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags) | |
753 | { | |
754 | if (S_ISDIR(mode)) | |
755 | return flags; | |
756 | else if (S_ISREG(mode)) | |
757 | return flags & F2FS_REG_FLMASK; | |
758 | else | |
759 | return flags & F2FS_OTHER_FLMASK; | |
760 | } | |
761 | ||
762 | long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
763 | { | |
6131ffaa | 764 | struct inode *inode = file_inode(filp); |
fbfa2cc5 JK |
765 | struct f2fs_inode_info *fi = F2FS_I(inode); |
766 | unsigned int flags; | |
767 | int ret; | |
768 | ||
769 | switch (cmd) { | |
6a3e8ef0 | 770 | case F2FS_IOC_GETFLAGS: |
fbfa2cc5 JK |
771 | flags = fi->i_flags & FS_FL_USER_VISIBLE; |
772 | return put_user(flags, (int __user *) arg); | |
6a3e8ef0 | 773 | case F2FS_IOC_SETFLAGS: |
fbfa2cc5 JK |
774 | { |
775 | unsigned int oldflags; | |
776 | ||
bdaec334 | 777 | ret = mnt_want_write_file(filp); |
fbfa2cc5 JK |
778 | if (ret) |
779 | return ret; | |
780 | ||
781 | if (!inode_owner_or_capable(inode)) { | |
782 | ret = -EACCES; | |
783 | goto out; | |
784 | } | |
785 | ||
786 | if (get_user(flags, (int __user *) arg)) { | |
787 | ret = -EFAULT; | |
788 | goto out; | |
789 | } | |
790 | ||
791 | flags = f2fs_mask_flags(inode->i_mode, flags); | |
792 | ||
793 | mutex_lock(&inode->i_mutex); | |
794 | ||
795 | oldflags = fi->i_flags; | |
796 | ||
797 | if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { | |
798 | if (!capable(CAP_LINUX_IMMUTABLE)) { | |
799 | mutex_unlock(&inode->i_mutex); | |
800 | ret = -EPERM; | |
801 | goto out; | |
802 | } | |
803 | } | |
804 | ||
805 | flags = flags & FS_FL_USER_MODIFIABLE; | |
806 | flags |= oldflags & ~FS_FL_USER_MODIFIABLE; | |
807 | fi->i_flags = flags; | |
808 | mutex_unlock(&inode->i_mutex); | |
809 | ||
810 | f2fs_set_inode_flags(inode); | |
811 | inode->i_ctime = CURRENT_TIME; | |
812 | mark_inode_dirty(inode); | |
813 | out: | |
bdaec334 | 814 | mnt_drop_write_file(filp); |
fbfa2cc5 JK |
815 | return ret; |
816 | } | |
817 | default: | |
818 | return -ENOTTY; | |
819 | } | |
820 | } | |
821 | ||
e9750824 NJ |
822 | #ifdef CONFIG_COMPAT |
823 | long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
824 | { | |
825 | switch (cmd) { | |
826 | case F2FS_IOC32_GETFLAGS: | |
827 | cmd = F2FS_IOC_GETFLAGS; | |
828 | break; | |
829 | case F2FS_IOC32_SETFLAGS: | |
830 | cmd = F2FS_IOC_SETFLAGS; | |
831 | break; | |
832 | default: | |
833 | return -ENOIOCTLCMD; | |
834 | } | |
835 | return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); | |
836 | } | |
837 | #endif | |
838 | ||
fbfa2cc5 | 839 | const struct file_operations f2fs_file_operations = { |
267378d4 | 840 | .llseek = f2fs_llseek, |
aad4f8bb | 841 | .read = new_sync_read, |
8174202b | 842 | .write = new_sync_write, |
aad4f8bb | 843 | .read_iter = generic_file_read_iter, |
8174202b | 844 | .write_iter = generic_file_write_iter, |
fbfa2cc5 JK |
845 | .open = generic_file_open, |
846 | .mmap = f2fs_file_mmap, | |
847 | .fsync = f2fs_sync_file, | |
848 | .fallocate = f2fs_fallocate, | |
849 | .unlocked_ioctl = f2fs_ioctl, | |
e9750824 NJ |
850 | #ifdef CONFIG_COMPAT |
851 | .compat_ioctl = f2fs_compat_ioctl, | |
852 | #endif | |
fbfa2cc5 | 853 | .splice_read = generic_file_splice_read, |
8d020765 | 854 | .splice_write = iter_file_splice_write, |
fbfa2cc5 | 855 | }; |