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" | |
db9f7c1a | 29 | #include "trace.h" |
a2a4a7e4 | 30 | #include <trace/events/f2fs.h> |
fbfa2cc5 JK |
31 | |
32 | static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma, | |
33 | struct vm_fault *vmf) | |
34 | { | |
35 | struct page *page = vmf->page; | |
6131ffaa | 36 | struct inode *inode = file_inode(vma->vm_file); |
4081363f | 37 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 | 38 | struct dnode_of_data dn; |
e479556b | 39 | int err; |
fbfa2cc5 JK |
40 | |
41 | f2fs_balance_fs(sbi); | |
42 | ||
43 | sb_start_pagefault(inode->i_sb); | |
b3d208f9 JK |
44 | |
45 | f2fs_bug_on(sbi, f2fs_has_inline_data(inode)); | |
b067ba1f | 46 | |
fbfa2cc5 | 47 | /* block allocation */ |
e479556b | 48 | f2fs_lock_op(sbi); |
b3d208f9 | 49 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
b600965c | 50 | err = f2fs_reserve_block(&dn, page->index); |
9ba69cf9 JK |
51 | if (err) { |
52 | f2fs_unlock_op(sbi); | |
b600965c | 53 | goto out; |
9ba69cf9 JK |
54 | } |
55 | f2fs_put_dnode(&dn); | |
56 | f2fs_unlock_op(sbi); | |
fbfa2cc5 | 57 | |
9851e6e1 | 58 | file_update_time(vma->vm_file); |
fbfa2cc5 | 59 | lock_page(page); |
6bacf52f | 60 | if (unlikely(page->mapping != inode->i_mapping || |
9851e6e1 | 61 | page_offset(page) > i_size_read(inode) || |
6bacf52f | 62 | !PageUptodate(page))) { |
fbfa2cc5 JK |
63 | unlock_page(page); |
64 | err = -EFAULT; | |
65 | goto out; | |
66 | } | |
67 | ||
68 | /* | |
69 | * check to see if the page is mapped already (no holes) | |
70 | */ | |
71 | if (PageMappedToDisk(page)) | |
9851e6e1 | 72 | goto mapped; |
fbfa2cc5 JK |
73 | |
74 | /* page is wholly or partially inside EOF */ | |
75 | if (((page->index + 1) << PAGE_CACHE_SHIFT) > i_size_read(inode)) { | |
76 | unsigned offset; | |
77 | offset = i_size_read(inode) & ~PAGE_CACHE_MASK; | |
78 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
79 | } | |
80 | set_page_dirty(page); | |
81 | SetPageUptodate(page); | |
82 | ||
e943a10d | 83 | trace_f2fs_vm_page_mkwrite(page, DATA); |
9851e6e1 NJ |
84 | mapped: |
85 | /* fill the page */ | |
3cb5ad15 | 86 | f2fs_wait_on_page_writeback(page, DATA); |
fbfa2cc5 JK |
87 | out: |
88 | sb_end_pagefault(inode->i_sb); | |
89 | return block_page_mkwrite_return(err); | |
90 | } | |
91 | ||
92 | static const struct vm_operations_struct f2fs_file_vm_ops = { | |
692bb55d | 93 | .fault = filemap_fault, |
f1820361 | 94 | .map_pages = filemap_map_pages, |
692bb55d | 95 | .page_mkwrite = f2fs_vm_page_mkwrite, |
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; | |
d5053a34 JK |
133 | else if (test_opt(sbi, FASTBOOT)) |
134 | need_cp = true; | |
a344b9fd JK |
135 | else if (sbi->active_logs == 2) |
136 | need_cp = true; | |
9d1589ef CY |
137 | |
138 | return need_cp; | |
139 | } | |
140 | ||
9c7bb702 CL |
141 | static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino) |
142 | { | |
143 | struct page *i = find_get_page(NODE_MAPPING(sbi), ino); | |
144 | bool ret = false; | |
145 | /* But we need to avoid that there are some inode updates */ | |
146 | if ((i && PageDirty(i)) || need_inode_block_update(sbi, ino)) | |
147 | ret = true; | |
148 | f2fs_put_page(i, 0); | |
149 | return ret; | |
150 | } | |
151 | ||
51455b19 CL |
152 | static void try_to_fix_pino(struct inode *inode) |
153 | { | |
154 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
155 | nid_t pino; | |
156 | ||
157 | down_write(&fi->i_sem); | |
158 | fi->xattr_ver = 0; | |
159 | if (file_wrong_pino(inode) && inode->i_nlink == 1 && | |
160 | get_parent_ino(inode, &pino)) { | |
161 | fi->i_pino = pino; | |
162 | file_got_pino(inode); | |
163 | up_write(&fi->i_sem); | |
164 | ||
165 | mark_inode_dirty_sync(inode); | |
166 | f2fs_write_inode(inode, NULL); | |
167 | } else { | |
168 | up_write(&fi->i_sem); | |
169 | } | |
170 | } | |
171 | ||
fbfa2cc5 JK |
172 | int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) |
173 | { | |
174 | struct inode *inode = file->f_mapping->host; | |
d928bfbf | 175 | struct f2fs_inode_info *fi = F2FS_I(inode); |
4081363f | 176 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
2403c155 | 177 | nid_t ino = inode->i_ino; |
fbfa2cc5 JK |
178 | int ret = 0; |
179 | bool need_cp = false; | |
180 | struct writeback_control wbc = { | |
c81bf1c8 | 181 | .sync_mode = WB_SYNC_ALL, |
fbfa2cc5 JK |
182 | .nr_to_write = LONG_MAX, |
183 | .for_reclaim = 0, | |
184 | }; | |
185 | ||
6bacf52f | 186 | if (unlikely(f2fs_readonly(inode->i_sb))) |
1fa95b0b NJ |
187 | return 0; |
188 | ||
a2a4a7e4 | 189 | trace_f2fs_sync_file_enter(inode); |
ea1aa12c JK |
190 | |
191 | /* if fdatasync is triggered, let's do in-place-update */ | |
c1ce1b02 | 192 | if (get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks) |
ea1aa12c | 193 | set_inode_flag(fi, FI_NEED_IPU); |
fbfa2cc5 | 194 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
c1ce1b02 JK |
195 | clear_inode_flag(fi, FI_NEED_IPU); |
196 | ||
a2a4a7e4 NJ |
197 | if (ret) { |
198 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); | |
fbfa2cc5 | 199 | return ret; |
a2a4a7e4 | 200 | } |
fbfa2cc5 | 201 | |
9c7bb702 CL |
202 | /* if the inode is dirty, let's recover all the time */ |
203 | if (!datasync && is_inode_flag_set(fi, FI_DIRTY_INODE)) { | |
204 | update_inode_page(inode); | |
205 | goto go_write; | |
206 | } | |
207 | ||
6d99ba41 JK |
208 | /* |
209 | * if there is no written data, don't waste time to write recovery info. | |
210 | */ | |
211 | if (!is_inode_flag_set(fi, FI_APPEND_WRITE) && | |
2403c155 | 212 | !exist_written_data(sbi, ino, APPEND_INO)) { |
19c9c466 | 213 | |
9c7bb702 CL |
214 | /* it may call write_inode just prior to fsync */ |
215 | if (need_inode_page_update(sbi, ino)) | |
19c9c466 | 216 | goto go_write; |
19c9c466 | 217 | |
6d99ba41 | 218 | if (is_inode_flag_set(fi, FI_UPDATE_WRITE) || |
2403c155 | 219 | exist_written_data(sbi, ino, UPDATE_INO)) |
6d99ba41 JK |
220 | goto flush_out; |
221 | goto out; | |
222 | } | |
19c9c466 | 223 | go_write: |
7d82db83 JK |
224 | /* guarantee free sections for fsync */ |
225 | f2fs_balance_fs(sbi); | |
226 | ||
e5d2385e JK |
227 | /* |
228 | * Both of fdatasync() and fsync() are able to be recovered from | |
229 | * sudden-power-off. | |
230 | */ | |
9d1589ef CY |
231 | down_read(&fi->i_sem); |
232 | need_cp = need_do_checkpoint(inode); | |
d928bfbf JK |
233 | up_read(&fi->i_sem); |
234 | ||
fbfa2cc5 JK |
235 | if (need_cp) { |
236 | /* all the dirty node pages should be flushed for POR */ | |
237 | ret = f2fs_sync_fs(inode->i_sb, 1); | |
d928bfbf | 238 | |
51455b19 CL |
239 | /* |
240 | * We've secured consistency through sync_fs. Following pino | |
241 | * will be used only for fsynced inodes after checkpoint. | |
242 | */ | |
243 | try_to_fix_pino(inode); | |
cff28521 JK |
244 | clear_inode_flag(fi, FI_APPEND_WRITE); |
245 | clear_inode_flag(fi, FI_UPDATE_WRITE); | |
51455b19 CL |
246 | goto out; |
247 | } | |
88bd02c9 | 248 | sync_nodes: |
51455b19 CL |
249 | sync_node_pages(sbi, ino, &wbc); |
250 | ||
871f599f JK |
251 | /* if cp_error was enabled, we should avoid infinite loop */ |
252 | if (unlikely(f2fs_cp_error(sbi))) | |
253 | goto out; | |
254 | ||
51455b19 CL |
255 | if (need_inode_block_update(sbi, ino)) { |
256 | mark_inode_dirty_sync(inode); | |
257 | f2fs_write_inode(inode, NULL); | |
258 | goto sync_nodes; | |
fbfa2cc5 | 259 | } |
51455b19 CL |
260 | |
261 | ret = wait_on_node_pages_writeback(sbi, ino); | |
262 | if (ret) | |
263 | goto out; | |
264 | ||
265 | /* once recovery info is written, don't need to tack this */ | |
266 | remove_dirty_inode(sbi, ino, APPEND_INO); | |
267 | clear_inode_flag(fi, FI_APPEND_WRITE); | |
268 | flush_out: | |
269 | remove_dirty_inode(sbi, ino, UPDATE_INO); | |
270 | clear_inode_flag(fi, FI_UPDATE_WRITE); | |
271 | ret = f2fs_issue_flush(sbi); | |
fbfa2cc5 | 272 | out: |
a2a4a7e4 | 273 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); |
db9f7c1a | 274 | f2fs_trace_ios(NULL, NULL, 1); |
fbfa2cc5 JK |
275 | return ret; |
276 | } | |
277 | ||
7f7670fe JK |
278 | static pgoff_t __get_first_dirty_index(struct address_space *mapping, |
279 | pgoff_t pgofs, int whence) | |
280 | { | |
281 | struct pagevec pvec; | |
282 | int nr_pages; | |
283 | ||
284 | if (whence != SEEK_DATA) | |
285 | return 0; | |
286 | ||
287 | /* find first dirty page index */ | |
288 | pagevec_init(&pvec, 0); | |
65b85ccc JK |
289 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs, |
290 | PAGECACHE_TAG_DIRTY, 1); | |
291 | pgofs = nr_pages ? pvec.pages[0]->index : LONG_MAX; | |
7f7670fe JK |
292 | pagevec_release(&pvec); |
293 | return pgofs; | |
294 | } | |
295 | ||
296 | static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs, | |
297 | int whence) | |
298 | { | |
299 | switch (whence) { | |
300 | case SEEK_DATA: | |
301 | if ((blkaddr == NEW_ADDR && dirty == pgofs) || | |
302 | (blkaddr != NEW_ADDR && blkaddr != NULL_ADDR)) | |
303 | return true; | |
304 | break; | |
305 | case SEEK_HOLE: | |
306 | if (blkaddr == NULL_ADDR) | |
307 | return true; | |
308 | break; | |
309 | } | |
310 | return false; | |
311 | } | |
312 | ||
267378d4 CY |
313 | static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence) |
314 | { | |
315 | struct inode *inode = file->f_mapping->host; | |
316 | loff_t maxbytes = inode->i_sb->s_maxbytes; | |
317 | struct dnode_of_data dn; | |
7f7670fe JK |
318 | pgoff_t pgofs, end_offset, dirty; |
319 | loff_t data_ofs = offset; | |
320 | loff_t isize; | |
267378d4 CY |
321 | int err = 0; |
322 | ||
323 | mutex_lock(&inode->i_mutex); | |
324 | ||
325 | isize = i_size_read(inode); | |
326 | if (offset >= isize) | |
327 | goto fail; | |
328 | ||
329 | /* handle inline data case */ | |
622f28ae | 330 | if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) { |
267378d4 CY |
331 | if (whence == SEEK_HOLE) |
332 | data_ofs = isize; | |
333 | goto found; | |
334 | } | |
335 | ||
336 | pgofs = (pgoff_t)(offset >> PAGE_CACHE_SHIFT); | |
337 | ||
7f7670fe JK |
338 | dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence); |
339 | ||
267378d4 CY |
340 | for (; data_ofs < isize; data_ofs = pgofs << PAGE_CACHE_SHIFT) { |
341 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
342 | err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE_RA); | |
343 | if (err && err != -ENOENT) { | |
344 | goto fail; | |
345 | } else if (err == -ENOENT) { | |
e1c42045 | 346 | /* direct node does not exists */ |
267378d4 CY |
347 | if (whence == SEEK_DATA) { |
348 | pgofs = PGOFS_OF_NEXT_DNODE(pgofs, | |
349 | F2FS_I(inode)); | |
350 | continue; | |
351 | } else { | |
352 | goto found; | |
353 | } | |
354 | } | |
355 | ||
6b2920a5 | 356 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
267378d4 CY |
357 | |
358 | /* find data/hole in dnode block */ | |
359 | for (; dn.ofs_in_node < end_offset; | |
360 | dn.ofs_in_node++, pgofs++, | |
2e023174 | 361 | data_ofs = (loff_t)pgofs << PAGE_CACHE_SHIFT) { |
267378d4 CY |
362 | block_t blkaddr; |
363 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
364 | ||
7f7670fe | 365 | if (__found_offset(blkaddr, dirty, pgofs, whence)) { |
267378d4 CY |
366 | f2fs_put_dnode(&dn); |
367 | goto found; | |
368 | } | |
369 | } | |
370 | f2fs_put_dnode(&dn); | |
371 | } | |
372 | ||
373 | if (whence == SEEK_DATA) | |
374 | goto fail; | |
267378d4 | 375 | found: |
fe369bc8 JK |
376 | if (whence == SEEK_HOLE && data_ofs > isize) |
377 | data_ofs = isize; | |
267378d4 CY |
378 | mutex_unlock(&inode->i_mutex); |
379 | return vfs_setpos(file, data_ofs, maxbytes); | |
380 | fail: | |
381 | mutex_unlock(&inode->i_mutex); | |
382 | return -ENXIO; | |
383 | } | |
384 | ||
385 | static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence) | |
386 | { | |
387 | struct inode *inode = file->f_mapping->host; | |
388 | loff_t maxbytes = inode->i_sb->s_maxbytes; | |
389 | ||
390 | switch (whence) { | |
391 | case SEEK_SET: | |
392 | case SEEK_CUR: | |
393 | case SEEK_END: | |
394 | return generic_file_llseek_size(file, offset, whence, | |
395 | maxbytes, i_size_read(inode)); | |
396 | case SEEK_DATA: | |
397 | case SEEK_HOLE: | |
0b4c5afd JK |
398 | if (offset < 0) |
399 | return -ENXIO; | |
267378d4 CY |
400 | return f2fs_seek_block(file, offset, whence); |
401 | } | |
402 | ||
403 | return -EINVAL; | |
404 | } | |
405 | ||
fbfa2cc5 JK |
406 | static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma) |
407 | { | |
b3d208f9 JK |
408 | struct inode *inode = file_inode(file); |
409 | ||
410 | /* we don't need to use inline_data strictly */ | |
411 | if (f2fs_has_inline_data(inode)) { | |
412 | int err = f2fs_convert_inline_inode(inode); | |
413 | if (err) | |
414 | return err; | |
415 | } | |
416 | ||
fbfa2cc5 JK |
417 | file_accessed(file); |
418 | vma->vm_ops = &f2fs_file_vm_ops; | |
419 | return 0; | |
420 | } | |
421 | ||
b292dcab | 422 | int truncate_data_blocks_range(struct dnode_of_data *dn, int count) |
fbfa2cc5 JK |
423 | { |
424 | int nr_free = 0, ofs = dn->ofs_in_node; | |
4081363f | 425 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
fbfa2cc5 JK |
426 | struct f2fs_node *raw_node; |
427 | __le32 *addr; | |
428 | ||
45590710 | 429 | raw_node = F2FS_NODE(dn->node_page); |
fbfa2cc5 JK |
430 | addr = blkaddr_in_node(raw_node) + ofs; |
431 | ||
6c311ec6 | 432 | for (; count > 0; count--, addr++, dn->ofs_in_node++) { |
fbfa2cc5 JK |
433 | block_t blkaddr = le32_to_cpu(*addr); |
434 | if (blkaddr == NULL_ADDR) | |
435 | continue; | |
436 | ||
e1509cf2 | 437 | dn->data_blkaddr = NULL_ADDR; |
216a620a | 438 | set_data_blkaddr(dn); |
7e4dde79 | 439 | f2fs_update_extent_cache(dn); |
fbfa2cc5 | 440 | invalidate_blocks(sbi, blkaddr); |
3c6c2beb JK |
441 | if (dn->ofs_in_node == 0 && IS_INODE(dn->node_page)) |
442 | clear_inode_flag(F2FS_I(dn->inode), | |
443 | FI_FIRST_BLOCK_WRITTEN); | |
fbfa2cc5 JK |
444 | nr_free++; |
445 | } | |
446 | if (nr_free) { | |
d7cc950b | 447 | dec_valid_block_count(sbi, dn->inode, nr_free); |
fbfa2cc5 JK |
448 | set_page_dirty(dn->node_page); |
449 | sync_inode_page(dn); | |
450 | } | |
451 | dn->ofs_in_node = ofs; | |
51dd6249 NJ |
452 | |
453 | trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid, | |
454 | dn->ofs_in_node, nr_free); | |
fbfa2cc5 JK |
455 | return nr_free; |
456 | } | |
457 | ||
458 | void truncate_data_blocks(struct dnode_of_data *dn) | |
459 | { | |
460 | truncate_data_blocks_range(dn, ADDRS_PER_BLOCK); | |
461 | } | |
462 | ||
0bfcfcca CY |
463 | static int truncate_partial_data_page(struct inode *inode, u64 from, |
464 | bool force) | |
fbfa2cc5 JK |
465 | { |
466 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
467 | struct page *page; | |
468 | ||
0bfcfcca | 469 | if (!offset && !force) |
b3d208f9 | 470 | return 0; |
fbfa2cc5 | 471 | |
0bfcfcca | 472 | page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, force); |
fbfa2cc5 | 473 | if (IS_ERR(page)) |
b3d208f9 | 474 | return 0; |
fbfa2cc5 JK |
475 | |
476 | lock_page(page); | |
ca0a81b3 CY |
477 | if (unlikely(!PageUptodate(page) || |
478 | page->mapping != inode->i_mapping)) | |
479 | goto out; | |
480 | ||
3cb5ad15 | 481 | f2fs_wait_on_page_writeback(page, DATA); |
fbfa2cc5 | 482 | zero_user(page, offset, PAGE_CACHE_SIZE - offset); |
0bfcfcca CY |
483 | if (!force) |
484 | set_page_dirty(page); | |
ca0a81b3 | 485 | out: |
fbfa2cc5 | 486 | f2fs_put_page(page, 1); |
b3d208f9 | 487 | return 0; |
fbfa2cc5 JK |
488 | } |
489 | ||
764aa3e9 | 490 | int truncate_blocks(struct inode *inode, u64 from, bool lock) |
fbfa2cc5 | 491 | { |
4081363f | 492 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 JK |
493 | unsigned int blocksize = inode->i_sb->s_blocksize; |
494 | struct dnode_of_data dn; | |
495 | pgoff_t free_from; | |
9ffe0fb5 | 496 | int count = 0, err = 0; |
b3d208f9 | 497 | struct page *ipage; |
0bfcfcca | 498 | bool truncate_page = false; |
fbfa2cc5 | 499 | |
51dd6249 NJ |
500 | trace_f2fs_truncate_blocks_enter(inode, from); |
501 | ||
f7ef9b83 | 502 | free_from = (pgoff_t)F2FS_BYTES_TO_BLK(from + blocksize - 1); |
fbfa2cc5 | 503 | |
764aa3e9 JK |
504 | if (lock) |
505 | f2fs_lock_op(sbi); | |
9ffe0fb5 | 506 | |
b3d208f9 JK |
507 | ipage = get_node_page(sbi, inode->i_ino); |
508 | if (IS_ERR(ipage)) { | |
509 | err = PTR_ERR(ipage); | |
510 | goto out; | |
511 | } | |
512 | ||
513 | if (f2fs_has_inline_data(inode)) { | |
0bfcfcca CY |
514 | if (truncate_inline_inode(ipage, from)) |
515 | set_page_dirty(ipage); | |
b3d208f9 | 516 | f2fs_put_page(ipage, 1); |
0bfcfcca | 517 | truncate_page = true; |
b3d208f9 JK |
518 | goto out; |
519 | } | |
520 | ||
521 | set_new_dnode(&dn, inode, ipage, NULL, 0); | |
266e97a8 | 522 | err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE); |
fbfa2cc5 JK |
523 | if (err) { |
524 | if (err == -ENOENT) | |
525 | goto free_next; | |
b3d208f9 | 526 | goto out; |
1ce86bf6 JK |
527 | } |
528 | ||
6403eb1f | 529 | count = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
fbfa2cc5 JK |
530 | |
531 | count -= dn.ofs_in_node; | |
9850cf4a | 532 | f2fs_bug_on(sbi, count < 0); |
39936837 | 533 | |
fbfa2cc5 JK |
534 | if (dn.ofs_in_node || IS_INODE(dn.node_page)) { |
535 | truncate_data_blocks_range(&dn, count); | |
536 | free_from += count; | |
537 | } | |
538 | ||
539 | f2fs_put_dnode(&dn); | |
540 | free_next: | |
541 | err = truncate_inode_blocks(inode, free_from); | |
764d2c80 JK |
542 | out: |
543 | if (lock) | |
544 | f2fs_unlock_op(sbi); | |
b3d208f9 JK |
545 | |
546 | /* lastly zero out the first data page */ | |
547 | if (!err) | |
0bfcfcca | 548 | err = truncate_partial_data_page(inode, from, truncate_page); |
fbfa2cc5 | 549 | |
51dd6249 | 550 | trace_f2fs_truncate_blocks_exit(inode, err); |
fbfa2cc5 JK |
551 | return err; |
552 | } | |
553 | ||
554 | void f2fs_truncate(struct inode *inode) | |
555 | { | |
556 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
557 | S_ISLNK(inode->i_mode))) | |
558 | return; | |
559 | ||
51dd6249 NJ |
560 | trace_f2fs_truncate(inode); |
561 | ||
92dffd01 JK |
562 | /* we should check inline_data size */ |
563 | if (f2fs_has_inline_data(inode) && !f2fs_may_inline(inode)) { | |
564 | if (f2fs_convert_inline_inode(inode)) | |
565 | return; | |
566 | } | |
567 | ||
764aa3e9 | 568 | if (!truncate_blocks(inode, i_size_read(inode), true)) { |
fbfa2cc5 JK |
569 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
570 | mark_inode_dirty(inode); | |
571 | } | |
fbfa2cc5 JK |
572 | } |
573 | ||
2d4d9fb5 | 574 | int f2fs_getattr(struct vfsmount *mnt, |
fbfa2cc5 JK |
575 | struct dentry *dentry, struct kstat *stat) |
576 | { | |
2b0143b5 | 577 | struct inode *inode = d_inode(dentry); |
fbfa2cc5 JK |
578 | generic_fillattr(inode, stat); |
579 | stat->blocks <<= 3; | |
580 | return 0; | |
581 | } | |
582 | ||
583 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
584 | static void __setattr_copy(struct inode *inode, const struct iattr *attr) | |
585 | { | |
586 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
587 | unsigned int ia_valid = attr->ia_valid; | |
588 | ||
589 | if (ia_valid & ATTR_UID) | |
590 | inode->i_uid = attr->ia_uid; | |
591 | if (ia_valid & ATTR_GID) | |
592 | inode->i_gid = attr->ia_gid; | |
593 | if (ia_valid & ATTR_ATIME) | |
594 | inode->i_atime = timespec_trunc(attr->ia_atime, | |
595 | inode->i_sb->s_time_gran); | |
596 | if (ia_valid & ATTR_MTIME) | |
597 | inode->i_mtime = timespec_trunc(attr->ia_mtime, | |
598 | inode->i_sb->s_time_gran); | |
599 | if (ia_valid & ATTR_CTIME) | |
600 | inode->i_ctime = timespec_trunc(attr->ia_ctime, | |
601 | inode->i_sb->s_time_gran); | |
602 | if (ia_valid & ATTR_MODE) { | |
603 | umode_t mode = attr->ia_mode; | |
604 | ||
605 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
606 | mode &= ~S_ISGID; | |
607 | set_acl_inode(fi, mode); | |
608 | } | |
609 | } | |
610 | #else | |
611 | #define __setattr_copy setattr_copy | |
612 | #endif | |
613 | ||
614 | int f2fs_setattr(struct dentry *dentry, struct iattr *attr) | |
615 | { | |
2b0143b5 | 616 | struct inode *inode = d_inode(dentry); |
fbfa2cc5 JK |
617 | struct f2fs_inode_info *fi = F2FS_I(inode); |
618 | int err; | |
619 | ||
620 | err = inode_change_ok(inode, attr); | |
621 | if (err) | |
622 | return err; | |
623 | ||
09db6a2e | 624 | if (attr->ia_valid & ATTR_SIZE) { |
09db6a2e CY |
625 | if (attr->ia_size != i_size_read(inode)) { |
626 | truncate_setsize(inode, attr->ia_size); | |
627 | f2fs_truncate(inode); | |
628 | f2fs_balance_fs(F2FS_I_SB(inode)); | |
629 | } else { | |
630 | /* | |
631 | * giving a chance to truncate blocks past EOF which | |
632 | * are fallocated with FALLOC_FL_KEEP_SIZE. | |
633 | */ | |
634 | f2fs_truncate(inode); | |
635 | } | |
fbfa2cc5 JK |
636 | } |
637 | ||
638 | __setattr_copy(inode, attr); | |
639 | ||
640 | if (attr->ia_valid & ATTR_MODE) { | |
a6dda0e6 | 641 | err = posix_acl_chmod(inode, get_inode_mode(inode)); |
fbfa2cc5 JK |
642 | if (err || is_inode_flag_set(fi, FI_ACL_MODE)) { |
643 | inode->i_mode = fi->i_acl_mode; | |
644 | clear_inode_flag(fi, FI_ACL_MODE); | |
645 | } | |
646 | } | |
647 | ||
648 | mark_inode_dirty(inode); | |
649 | return err; | |
650 | } | |
651 | ||
652 | const struct inode_operations f2fs_file_inode_operations = { | |
653 | .getattr = f2fs_getattr, | |
654 | .setattr = f2fs_setattr, | |
655 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 656 | .set_acl = f2fs_set_acl, |
fbfa2cc5 JK |
657 | #ifdef CONFIG_F2FS_FS_XATTR |
658 | .setxattr = generic_setxattr, | |
659 | .getxattr = generic_getxattr, | |
660 | .listxattr = f2fs_listxattr, | |
661 | .removexattr = generic_removexattr, | |
662 | #endif | |
9ab70134 | 663 | .fiemap = f2fs_fiemap, |
fbfa2cc5 JK |
664 | }; |
665 | ||
666 | static void fill_zero(struct inode *inode, pgoff_t index, | |
667 | loff_t start, loff_t len) | |
668 | { | |
4081363f | 669 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 JK |
670 | struct page *page; |
671 | ||
672 | if (!len) | |
673 | return; | |
674 | ||
bd43df02 JK |
675 | f2fs_balance_fs(sbi); |
676 | ||
e479556b | 677 | f2fs_lock_op(sbi); |
64aa7ed9 | 678 | page = get_new_data_page(inode, NULL, index, false); |
e479556b | 679 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
680 | |
681 | if (!IS_ERR(page)) { | |
3cb5ad15 | 682 | f2fs_wait_on_page_writeback(page, DATA); |
fbfa2cc5 JK |
683 | zero_user(page, start, len); |
684 | set_page_dirty(page); | |
685 | f2fs_put_page(page, 1); | |
686 | } | |
687 | } | |
688 | ||
689 | int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) | |
690 | { | |
691 | pgoff_t index; | |
692 | int err; | |
693 | ||
694 | for (index = pg_start; index < pg_end; index++) { | |
695 | struct dnode_of_data dn; | |
9eaeba70 | 696 | |
fbfa2cc5 | 697 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 698 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
fbfa2cc5 | 699 | if (err) { |
fbfa2cc5 JK |
700 | if (err == -ENOENT) |
701 | continue; | |
702 | return err; | |
703 | } | |
704 | ||
705 | if (dn.data_blkaddr != NULL_ADDR) | |
706 | truncate_data_blocks_range(&dn, 1); | |
707 | f2fs_put_dnode(&dn); | |
fbfa2cc5 JK |
708 | } |
709 | return 0; | |
710 | } | |
711 | ||
a66c7b2f | 712 | static int punch_hole(struct inode *inode, loff_t offset, loff_t len) |
fbfa2cc5 JK |
713 | { |
714 | pgoff_t pg_start, pg_end; | |
715 | loff_t off_start, off_end; | |
716 | int ret = 0; | |
717 | ||
14cecc5c CY |
718 | if (!S_ISREG(inode->i_mode)) |
719 | return -EOPNOTSUPP; | |
720 | ||
721 | /* skip punching hole beyond i_size */ | |
722 | if (offset >= inode->i_size) | |
723 | return ret; | |
724 | ||
b3d208f9 JK |
725 | if (f2fs_has_inline_data(inode)) { |
726 | ret = f2fs_convert_inline_inode(inode); | |
727 | if (ret) | |
728 | return ret; | |
729 | } | |
9ffe0fb5 | 730 | |
fbfa2cc5 JK |
731 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; |
732 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
733 | ||
734 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
735 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
736 | ||
737 | if (pg_start == pg_end) { | |
738 | fill_zero(inode, pg_start, off_start, | |
739 | off_end - off_start); | |
740 | } else { | |
741 | if (off_start) | |
742 | fill_zero(inode, pg_start++, off_start, | |
743 | PAGE_CACHE_SIZE - off_start); | |
744 | if (off_end) | |
745 | fill_zero(inode, pg_end, 0, off_end); | |
746 | ||
747 | if (pg_start < pg_end) { | |
748 | struct address_space *mapping = inode->i_mapping; | |
749 | loff_t blk_start, blk_end; | |
4081363f | 750 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
1127a3d4 JH |
751 | |
752 | f2fs_balance_fs(sbi); | |
fbfa2cc5 JK |
753 | |
754 | blk_start = pg_start << PAGE_CACHE_SHIFT; | |
755 | blk_end = pg_end << PAGE_CACHE_SHIFT; | |
756 | truncate_inode_pages_range(mapping, blk_start, | |
757 | blk_end - 1); | |
39936837 | 758 | |
e479556b | 759 | f2fs_lock_op(sbi); |
fbfa2cc5 | 760 | ret = truncate_hole(inode, pg_start, pg_end); |
e479556b | 761 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
762 | } |
763 | } | |
764 | ||
fbfa2cc5 JK |
765 | return ret; |
766 | } | |
767 | ||
768 | static int expand_inode_data(struct inode *inode, loff_t offset, | |
769 | loff_t len, int mode) | |
770 | { | |
4081363f | 771 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 JK |
772 | pgoff_t index, pg_start, pg_end; |
773 | loff_t new_size = i_size_read(inode); | |
774 | loff_t off_start, off_end; | |
775 | int ret = 0; | |
776 | ||
497a0930 CY |
777 | f2fs_balance_fs(sbi); |
778 | ||
fbfa2cc5 JK |
779 | ret = inode_newsize_ok(inode, (len + offset)); |
780 | if (ret) | |
781 | return ret; | |
782 | ||
b3d208f9 JK |
783 | if (f2fs_has_inline_data(inode)) { |
784 | ret = f2fs_convert_inline_inode(inode); | |
785 | if (ret) | |
786 | return ret; | |
787 | } | |
9e09fc85 | 788 | |
fbfa2cc5 JK |
789 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; |
790 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
791 | ||
792 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
793 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
794 | ||
ead43275 JK |
795 | f2fs_lock_op(sbi); |
796 | ||
fbfa2cc5 JK |
797 | for (index = pg_start; index <= pg_end; index++) { |
798 | struct dnode_of_data dn; | |
799 | ||
98397ff3 JK |
800 | if (index == pg_end && !off_end) |
801 | goto noalloc; | |
802 | ||
fbfa2cc5 | 803 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
b600965c | 804 | ret = f2fs_reserve_block(&dn, index); |
b600965c | 805 | if (ret) |
fbfa2cc5 | 806 | break; |
98397ff3 | 807 | noalloc: |
fbfa2cc5 JK |
808 | if (pg_start == pg_end) |
809 | new_size = offset + len; | |
810 | else if (index == pg_start && off_start) | |
811 | new_size = (index + 1) << PAGE_CACHE_SHIFT; | |
812 | else if (index == pg_end) | |
813 | new_size = (index << PAGE_CACHE_SHIFT) + off_end; | |
814 | else | |
815 | new_size += PAGE_CACHE_SIZE; | |
816 | } | |
817 | ||
818 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
819 | i_size_read(inode) < new_size) { | |
820 | i_size_write(inode, new_size); | |
821 | mark_inode_dirty(inode); | |
ead43275 | 822 | update_inode_page(inode); |
fbfa2cc5 | 823 | } |
ead43275 | 824 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
825 | |
826 | return ret; | |
827 | } | |
828 | ||
829 | static long f2fs_fallocate(struct file *file, int mode, | |
830 | loff_t offset, loff_t len) | |
831 | { | |
6131ffaa | 832 | struct inode *inode = file_inode(file); |
fbfa2cc5 JK |
833 | long ret; |
834 | ||
835 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) | |
836 | return -EOPNOTSUPP; | |
837 | ||
3375f696 CY |
838 | mutex_lock(&inode->i_mutex); |
839 | ||
fbfa2cc5 | 840 | if (mode & FALLOC_FL_PUNCH_HOLE) |
a66c7b2f | 841 | ret = punch_hole(inode, offset, len); |
fbfa2cc5 JK |
842 | else |
843 | ret = expand_inode_data(inode, offset, len, mode); | |
844 | ||
3af60a49 NJ |
845 | if (!ret) { |
846 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
847 | mark_inode_dirty(inode); | |
848 | } | |
3375f696 CY |
849 | |
850 | mutex_unlock(&inode->i_mutex); | |
851 | ||
c01e2853 | 852 | trace_f2fs_fallocate(inode, mode, offset, len, ret); |
fbfa2cc5 JK |
853 | return ret; |
854 | } | |
855 | ||
1e84371f JK |
856 | static int f2fs_release_file(struct inode *inode, struct file *filp) |
857 | { | |
858 | /* some remained atomic pages should discarded */ | |
859 | if (f2fs_is_atomic_file(inode)) | |
860 | commit_inmem_pages(inode, true); | |
861 | if (f2fs_is_volatile_file(inode)) { | |
862 | set_inode_flag(F2FS_I(inode), FI_DROP_CACHE); | |
863 | filemap_fdatawrite(inode->i_mapping); | |
864 | clear_inode_flag(F2FS_I(inode), FI_DROP_CACHE); | |
865 | } | |
866 | return 0; | |
867 | } | |
868 | ||
fbfa2cc5 JK |
869 | #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL)) |
870 | #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL) | |
871 | ||
872 | static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags) | |
873 | { | |
874 | if (S_ISDIR(mode)) | |
875 | return flags; | |
876 | else if (S_ISREG(mode)) | |
877 | return flags & F2FS_REG_FLMASK; | |
878 | else | |
879 | return flags & F2FS_OTHER_FLMASK; | |
880 | } | |
881 | ||
52656e6c | 882 | static int f2fs_ioc_getflags(struct file *filp, unsigned long arg) |
fbfa2cc5 | 883 | { |
6131ffaa | 884 | struct inode *inode = file_inode(filp); |
fbfa2cc5 | 885 | struct f2fs_inode_info *fi = F2FS_I(inode); |
52656e6c JK |
886 | unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE; |
887 | return put_user(flags, (int __user *)arg); | |
888 | } | |
fbfa2cc5 | 889 | |
52656e6c JK |
890 | static int f2fs_ioc_setflags(struct file *filp, unsigned long arg) |
891 | { | |
892 | struct inode *inode = file_inode(filp); | |
893 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
894 | unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE; | |
895 | unsigned int oldflags; | |
896 | int ret; | |
fbfa2cc5 | 897 | |
52656e6c JK |
898 | ret = mnt_want_write_file(filp); |
899 | if (ret) | |
900 | return ret; | |
fbfa2cc5 | 901 | |
52656e6c JK |
902 | if (!inode_owner_or_capable(inode)) { |
903 | ret = -EACCES; | |
904 | goto out; | |
905 | } | |
fbfa2cc5 | 906 | |
52656e6c JK |
907 | if (get_user(flags, (int __user *)arg)) { |
908 | ret = -EFAULT; | |
909 | goto out; | |
910 | } | |
fbfa2cc5 | 911 | |
52656e6c | 912 | flags = f2fs_mask_flags(inode->i_mode, flags); |
fbfa2cc5 | 913 | |
52656e6c | 914 | mutex_lock(&inode->i_mutex); |
fbfa2cc5 | 915 | |
52656e6c | 916 | oldflags = fi->i_flags; |
fbfa2cc5 | 917 | |
52656e6c JK |
918 | if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { |
919 | if (!capable(CAP_LINUX_IMMUTABLE)) { | |
920 | mutex_unlock(&inode->i_mutex); | |
921 | ret = -EPERM; | |
922 | goto out; | |
fbfa2cc5 | 923 | } |
52656e6c | 924 | } |
fbfa2cc5 | 925 | |
52656e6c JK |
926 | flags = flags & FS_FL_USER_MODIFIABLE; |
927 | flags |= oldflags & ~FS_FL_USER_MODIFIABLE; | |
928 | fi->i_flags = flags; | |
929 | mutex_unlock(&inode->i_mutex); | |
fbfa2cc5 | 930 | |
52656e6c JK |
931 | f2fs_set_inode_flags(inode); |
932 | inode->i_ctime = CURRENT_TIME; | |
933 | mark_inode_dirty(inode); | |
fbfa2cc5 | 934 | out: |
52656e6c JK |
935 | mnt_drop_write_file(filp); |
936 | return ret; | |
937 | } | |
4b2fecc8 | 938 | |
d49f3e89 CY |
939 | static int f2fs_ioc_getversion(struct file *filp, unsigned long arg) |
940 | { | |
941 | struct inode *inode = file_inode(filp); | |
942 | ||
943 | return put_user(inode->i_generation, (int __user *)arg); | |
944 | } | |
945 | ||
88b88a66 JK |
946 | static int f2fs_ioc_start_atomic_write(struct file *filp) |
947 | { | |
948 | struct inode *inode = file_inode(filp); | |
88b88a66 JK |
949 | |
950 | if (!inode_owner_or_capable(inode)) | |
951 | return -EACCES; | |
952 | ||
1e84371f JK |
953 | f2fs_balance_fs(F2FS_I_SB(inode)); |
954 | ||
955 | if (f2fs_is_atomic_file(inode)) | |
956 | return 0; | |
88b88a66 JK |
957 | |
958 | set_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); | |
959 | ||
b3d208f9 | 960 | return f2fs_convert_inline_inode(inode); |
88b88a66 JK |
961 | } |
962 | ||
963 | static int f2fs_ioc_commit_atomic_write(struct file *filp) | |
964 | { | |
965 | struct inode *inode = file_inode(filp); | |
966 | int ret; | |
967 | ||
968 | if (!inode_owner_or_capable(inode)) | |
969 | return -EACCES; | |
970 | ||
02a1335f JK |
971 | if (f2fs_is_volatile_file(inode)) |
972 | return 0; | |
973 | ||
88b88a66 JK |
974 | ret = mnt_want_write_file(filp); |
975 | if (ret) | |
976 | return ret; | |
977 | ||
978 | if (f2fs_is_atomic_file(inode)) | |
979 | commit_inmem_pages(inode, false); | |
980 | ||
981 | ret = f2fs_sync_file(filp, 0, LONG_MAX, 0); | |
982 | mnt_drop_write_file(filp); | |
1e84371f | 983 | clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); |
88b88a66 JK |
984 | return ret; |
985 | } | |
986 | ||
02a1335f JK |
987 | static int f2fs_ioc_start_volatile_write(struct file *filp) |
988 | { | |
989 | struct inode *inode = file_inode(filp); | |
990 | ||
991 | if (!inode_owner_or_capable(inode)) | |
992 | return -EACCES; | |
993 | ||
1e84371f JK |
994 | if (f2fs_is_volatile_file(inode)) |
995 | return 0; | |
996 | ||
02a1335f | 997 | set_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE); |
b3d208f9 JK |
998 | |
999 | return f2fs_convert_inline_inode(inode); | |
02a1335f JK |
1000 | } |
1001 | ||
1e84371f JK |
1002 | static int f2fs_ioc_release_volatile_write(struct file *filp) |
1003 | { | |
1004 | struct inode *inode = file_inode(filp); | |
1005 | ||
1006 | if (!inode_owner_or_capable(inode)) | |
1007 | return -EACCES; | |
1008 | ||
1009 | if (!f2fs_is_volatile_file(inode)) | |
1010 | return 0; | |
1011 | ||
3c6c2beb JK |
1012 | if (!f2fs_is_first_block_written(inode)) |
1013 | return truncate_partial_data_page(inode, 0, true); | |
1014 | ||
1e84371f JK |
1015 | punch_hole(inode, 0, F2FS_BLKSIZE); |
1016 | return 0; | |
1017 | } | |
1018 | ||
1019 | static int f2fs_ioc_abort_volatile_write(struct file *filp) | |
1020 | { | |
1021 | struct inode *inode = file_inode(filp); | |
1022 | int ret; | |
1023 | ||
1024 | if (!inode_owner_or_capable(inode)) | |
1025 | return -EACCES; | |
1026 | ||
1027 | ret = mnt_want_write_file(filp); | |
1028 | if (ret) | |
1029 | return ret; | |
1030 | ||
1031 | f2fs_balance_fs(F2FS_I_SB(inode)); | |
1032 | ||
1033 | if (f2fs_is_atomic_file(inode)) { | |
1034 | commit_inmem_pages(inode, false); | |
1035 | clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); | |
1036 | } | |
1037 | ||
1038 | if (f2fs_is_volatile_file(inode)) { | |
1039 | clear_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE); | |
1040 | filemap_fdatawrite(inode->i_mapping); | |
1041 | set_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE); | |
1042 | } | |
1043 | mnt_drop_write_file(filp); | |
1044 | return ret; | |
1045 | } | |
1046 | ||
1abff93d JK |
1047 | static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg) |
1048 | { | |
1049 | struct inode *inode = file_inode(filp); | |
1050 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1051 | struct super_block *sb = sbi->sb; | |
1052 | __u32 in; | |
1053 | ||
1054 | if (!capable(CAP_SYS_ADMIN)) | |
1055 | return -EPERM; | |
1056 | ||
1057 | if (get_user(in, (__u32 __user *)arg)) | |
1058 | return -EFAULT; | |
1059 | ||
1060 | switch (in) { | |
1061 | case F2FS_GOING_DOWN_FULLSYNC: | |
1062 | sb = freeze_bdev(sb->s_bdev); | |
1063 | if (sb && !IS_ERR(sb)) { | |
1064 | f2fs_stop_checkpoint(sbi); | |
1065 | thaw_bdev(sb->s_bdev, sb); | |
1066 | } | |
1067 | break; | |
1068 | case F2FS_GOING_DOWN_METASYNC: | |
1069 | /* do checkpoint only */ | |
1070 | f2fs_sync_fs(sb, 1); | |
1071 | f2fs_stop_checkpoint(sbi); | |
1072 | break; | |
1073 | case F2FS_GOING_DOWN_NOSYNC: | |
1074 | f2fs_stop_checkpoint(sbi); | |
1075 | break; | |
1076 | default: | |
1077 | return -EINVAL; | |
1078 | } | |
1079 | return 0; | |
1080 | } | |
1081 | ||
52656e6c JK |
1082 | static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg) |
1083 | { | |
1084 | struct inode *inode = file_inode(filp); | |
1085 | struct super_block *sb = inode->i_sb; | |
1086 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
1087 | struct fstrim_range range; | |
1088 | int ret; | |
4b2fecc8 | 1089 | |
52656e6c JK |
1090 | if (!capable(CAP_SYS_ADMIN)) |
1091 | return -EPERM; | |
4b2fecc8 | 1092 | |
52656e6c JK |
1093 | if (!blk_queue_discard(q)) |
1094 | return -EOPNOTSUPP; | |
4b2fecc8 | 1095 | |
52656e6c JK |
1096 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
1097 | sizeof(range))) | |
1098 | return -EFAULT; | |
4b2fecc8 | 1099 | |
52656e6c JK |
1100 | range.minlen = max((unsigned int)range.minlen, |
1101 | q->limits.discard_granularity); | |
1102 | ret = f2fs_trim_fs(F2FS_SB(sb), &range); | |
1103 | if (ret < 0) | |
1104 | return ret; | |
4b2fecc8 | 1105 | |
52656e6c JK |
1106 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
1107 | sizeof(range))) | |
1108 | return -EFAULT; | |
1109 | return 0; | |
1110 | } | |
1111 | ||
1112 | long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
1113 | { | |
1114 | switch (cmd) { | |
1115 | case F2FS_IOC_GETFLAGS: | |
1116 | return f2fs_ioc_getflags(filp, arg); | |
1117 | case F2FS_IOC_SETFLAGS: | |
1118 | return f2fs_ioc_setflags(filp, arg); | |
d49f3e89 CY |
1119 | case F2FS_IOC_GETVERSION: |
1120 | return f2fs_ioc_getversion(filp, arg); | |
88b88a66 JK |
1121 | case F2FS_IOC_START_ATOMIC_WRITE: |
1122 | return f2fs_ioc_start_atomic_write(filp); | |
1123 | case F2FS_IOC_COMMIT_ATOMIC_WRITE: | |
1124 | return f2fs_ioc_commit_atomic_write(filp); | |
02a1335f JK |
1125 | case F2FS_IOC_START_VOLATILE_WRITE: |
1126 | return f2fs_ioc_start_volatile_write(filp); | |
1e84371f JK |
1127 | case F2FS_IOC_RELEASE_VOLATILE_WRITE: |
1128 | return f2fs_ioc_release_volatile_write(filp); | |
1129 | case F2FS_IOC_ABORT_VOLATILE_WRITE: | |
1130 | return f2fs_ioc_abort_volatile_write(filp); | |
1abff93d JK |
1131 | case F2FS_IOC_SHUTDOWN: |
1132 | return f2fs_ioc_shutdown(filp, arg); | |
52656e6c JK |
1133 | case FITRIM: |
1134 | return f2fs_ioc_fitrim(filp, arg); | |
fbfa2cc5 JK |
1135 | default: |
1136 | return -ENOTTY; | |
1137 | } | |
1138 | } | |
1139 | ||
e9750824 NJ |
1140 | #ifdef CONFIG_COMPAT |
1141 | long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
1142 | { | |
1143 | switch (cmd) { | |
1144 | case F2FS_IOC32_GETFLAGS: | |
1145 | cmd = F2FS_IOC_GETFLAGS; | |
1146 | break; | |
1147 | case F2FS_IOC32_SETFLAGS: | |
1148 | cmd = F2FS_IOC_SETFLAGS; | |
1149 | break; | |
1150 | default: | |
1151 | return -ENOIOCTLCMD; | |
1152 | } | |
1153 | return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); | |
1154 | } | |
1155 | #endif | |
1156 | ||
fbfa2cc5 | 1157 | const struct file_operations f2fs_file_operations = { |
267378d4 | 1158 | .llseek = f2fs_llseek, |
aad4f8bb | 1159 | .read_iter = generic_file_read_iter, |
8174202b | 1160 | .write_iter = generic_file_write_iter, |
fbfa2cc5 | 1161 | .open = generic_file_open, |
12662234 | 1162 | .release = f2fs_release_file, |
fbfa2cc5 JK |
1163 | .mmap = f2fs_file_mmap, |
1164 | .fsync = f2fs_sync_file, | |
1165 | .fallocate = f2fs_fallocate, | |
1166 | .unlocked_ioctl = f2fs_ioctl, | |
e9750824 NJ |
1167 | #ifdef CONFIG_COMPAT |
1168 | .compat_ioctl = f2fs_compat_ioctl, | |
1169 | #endif | |
fbfa2cc5 | 1170 | .splice_read = generic_file_splice_read, |
8d020765 | 1171 | .splice_write = iter_file_splice_write, |
fbfa2cc5 | 1172 | }; |