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> |
f424f664 | 23 | #include <linux/random.h> |
fbfa2cc5 JK |
24 | |
25 | #include "f2fs.h" | |
26 | #include "node.h" | |
27 | #include "segment.h" | |
28 | #include "xattr.h" | |
29 | #include "acl.h" | |
db9f7c1a | 30 | #include "trace.h" |
a2a4a7e4 | 31 | #include <trace/events/f2fs.h> |
fbfa2cc5 JK |
32 | |
33 | static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma, | |
34 | struct vm_fault *vmf) | |
35 | { | |
36 | struct page *page = vmf->page; | |
6131ffaa | 37 | struct inode *inode = file_inode(vma->vm_file); |
4081363f | 38 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 | 39 | struct dnode_of_data dn; |
e479556b | 40 | int err; |
fbfa2cc5 JK |
41 | |
42 | f2fs_balance_fs(sbi); | |
43 | ||
44 | sb_start_pagefault(inode->i_sb); | |
b3d208f9 JK |
45 | |
46 | f2fs_bug_on(sbi, f2fs_has_inline_data(inode)); | |
b067ba1f | 47 | |
fbfa2cc5 | 48 | /* block allocation */ |
e479556b | 49 | f2fs_lock_op(sbi); |
b3d208f9 | 50 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
b600965c | 51 | err = f2fs_reserve_block(&dn, page->index); |
9ba69cf9 JK |
52 | if (err) { |
53 | f2fs_unlock_op(sbi); | |
b600965c | 54 | goto out; |
9ba69cf9 JK |
55 | } |
56 | f2fs_put_dnode(&dn); | |
57 | f2fs_unlock_op(sbi); | |
fbfa2cc5 | 58 | |
9851e6e1 | 59 | file_update_time(vma->vm_file); |
fbfa2cc5 | 60 | lock_page(page); |
6bacf52f | 61 | if (unlikely(page->mapping != inode->i_mapping || |
9851e6e1 | 62 | page_offset(page) > i_size_read(inode) || |
6bacf52f | 63 | !PageUptodate(page))) { |
fbfa2cc5 JK |
64 | unlock_page(page); |
65 | err = -EFAULT; | |
66 | goto out; | |
67 | } | |
68 | ||
69 | /* | |
70 | * check to see if the page is mapped already (no holes) | |
71 | */ | |
72 | if (PageMappedToDisk(page)) | |
9851e6e1 | 73 | goto mapped; |
fbfa2cc5 JK |
74 | |
75 | /* page is wholly or partially inside EOF */ | |
76 | if (((page->index + 1) << PAGE_CACHE_SHIFT) > i_size_read(inode)) { | |
77 | unsigned offset; | |
78 | offset = i_size_read(inode) & ~PAGE_CACHE_MASK; | |
79 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
80 | } | |
81 | set_page_dirty(page); | |
82 | SetPageUptodate(page); | |
83 | ||
e943a10d | 84 | trace_f2fs_vm_page_mkwrite(page, DATA); |
9851e6e1 NJ |
85 | mapped: |
86 | /* fill the page */ | |
3cb5ad15 | 87 | f2fs_wait_on_page_writeback(page, DATA); |
fbfa2cc5 JK |
88 | out: |
89 | sb_end_pagefault(inode->i_sb); | |
90 | return block_page_mkwrite_return(err); | |
91 | } | |
92 | ||
93 | static const struct vm_operations_struct f2fs_file_vm_ops = { | |
692bb55d | 94 | .fault = filemap_fault, |
f1820361 | 95 | .map_pages = filemap_map_pages, |
692bb55d | 96 | .page_mkwrite = f2fs_vm_page_mkwrite, |
fbfa2cc5 JK |
97 | }; |
98 | ||
354a3399 JK |
99 | static int get_parent_ino(struct inode *inode, nid_t *pino) |
100 | { | |
101 | struct dentry *dentry; | |
102 | ||
103 | inode = igrab(inode); | |
104 | dentry = d_find_any_alias(inode); | |
105 | iput(inode); | |
106 | if (!dentry) | |
107 | return 0; | |
108 | ||
f0947e5c JK |
109 | if (update_dent_inode(inode, &dentry->d_name)) { |
110 | dput(dentry); | |
111 | return 0; | |
112 | } | |
354a3399 | 113 | |
f0947e5c JK |
114 | *pino = parent_ino(dentry); |
115 | dput(dentry); | |
354a3399 JK |
116 | return 1; |
117 | } | |
118 | ||
9d1589ef CY |
119 | static inline bool need_do_checkpoint(struct inode *inode) |
120 | { | |
4081363f | 121 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
9d1589ef CY |
122 | bool need_cp = false; |
123 | ||
124 | if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1) | |
125 | need_cp = true; | |
126 | else if (file_wrong_pino(inode)) | |
127 | need_cp = true; | |
128 | else if (!space_for_roll_forward(sbi)) | |
129 | need_cp = true; | |
130 | else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino)) | |
131 | need_cp = true; | |
132 | else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi))) | |
133 | need_cp = true; | |
d5053a34 JK |
134 | else if (test_opt(sbi, FASTBOOT)) |
135 | need_cp = true; | |
a344b9fd JK |
136 | else if (sbi->active_logs == 2) |
137 | need_cp = true; | |
9d1589ef CY |
138 | |
139 | return need_cp; | |
140 | } | |
141 | ||
9c7bb702 CL |
142 | static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino) |
143 | { | |
144 | struct page *i = find_get_page(NODE_MAPPING(sbi), ino); | |
145 | bool ret = false; | |
146 | /* But we need to avoid that there are some inode updates */ | |
147 | if ((i && PageDirty(i)) || need_inode_block_update(sbi, ino)) | |
148 | ret = true; | |
149 | f2fs_put_page(i, 0); | |
150 | return ret; | |
151 | } | |
152 | ||
51455b19 CL |
153 | static void try_to_fix_pino(struct inode *inode) |
154 | { | |
155 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
156 | nid_t pino; | |
157 | ||
158 | down_write(&fi->i_sem); | |
159 | fi->xattr_ver = 0; | |
160 | if (file_wrong_pino(inode) && inode->i_nlink == 1 && | |
161 | get_parent_ino(inode, &pino)) { | |
162 | fi->i_pino = pino; | |
163 | file_got_pino(inode); | |
164 | up_write(&fi->i_sem); | |
165 | ||
166 | mark_inode_dirty_sync(inode); | |
167 | f2fs_write_inode(inode, NULL); | |
168 | } else { | |
169 | up_write(&fi->i_sem); | |
170 | } | |
171 | } | |
172 | ||
fbfa2cc5 JK |
173 | int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) |
174 | { | |
175 | struct inode *inode = file->f_mapping->host; | |
d928bfbf | 176 | struct f2fs_inode_info *fi = F2FS_I(inode); |
4081363f | 177 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
2403c155 | 178 | nid_t ino = inode->i_ino; |
fbfa2cc5 JK |
179 | int ret = 0; |
180 | bool need_cp = false; | |
181 | struct writeback_control wbc = { | |
c81bf1c8 | 182 | .sync_mode = WB_SYNC_ALL, |
fbfa2cc5 JK |
183 | .nr_to_write = LONG_MAX, |
184 | .for_reclaim = 0, | |
185 | }; | |
186 | ||
6bacf52f | 187 | if (unlikely(f2fs_readonly(inode->i_sb))) |
1fa95b0b NJ |
188 | return 0; |
189 | ||
a2a4a7e4 | 190 | trace_f2fs_sync_file_enter(inode); |
ea1aa12c JK |
191 | |
192 | /* if fdatasync is triggered, let's do in-place-update */ | |
c1ce1b02 | 193 | if (get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks) |
ea1aa12c | 194 | set_inode_flag(fi, FI_NEED_IPU); |
fbfa2cc5 | 195 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
c1ce1b02 JK |
196 | clear_inode_flag(fi, FI_NEED_IPU); |
197 | ||
a2a4a7e4 NJ |
198 | if (ret) { |
199 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); | |
fbfa2cc5 | 200 | return ret; |
a2a4a7e4 | 201 | } |
fbfa2cc5 | 202 | |
9c7bb702 CL |
203 | /* if the inode is dirty, let's recover all the time */ |
204 | if (!datasync && is_inode_flag_set(fi, FI_DIRTY_INODE)) { | |
205 | update_inode_page(inode); | |
206 | goto go_write; | |
207 | } | |
208 | ||
6d99ba41 JK |
209 | /* |
210 | * if there is no written data, don't waste time to write recovery info. | |
211 | */ | |
212 | if (!is_inode_flag_set(fi, FI_APPEND_WRITE) && | |
2403c155 | 213 | !exist_written_data(sbi, ino, APPEND_INO)) { |
19c9c466 | 214 | |
9c7bb702 CL |
215 | /* it may call write_inode just prior to fsync */ |
216 | if (need_inode_page_update(sbi, ino)) | |
19c9c466 | 217 | goto go_write; |
19c9c466 | 218 | |
6d99ba41 | 219 | if (is_inode_flag_set(fi, FI_UPDATE_WRITE) || |
2403c155 | 220 | exist_written_data(sbi, ino, UPDATE_INO)) |
6d99ba41 JK |
221 | goto flush_out; |
222 | goto out; | |
223 | } | |
19c9c466 | 224 | go_write: |
7d82db83 JK |
225 | /* guarantee free sections for fsync */ |
226 | f2fs_balance_fs(sbi); | |
227 | ||
e5d2385e JK |
228 | /* |
229 | * Both of fdatasync() and fsync() are able to be recovered from | |
230 | * sudden-power-off. | |
231 | */ | |
9d1589ef CY |
232 | down_read(&fi->i_sem); |
233 | need_cp = need_do_checkpoint(inode); | |
d928bfbf JK |
234 | up_read(&fi->i_sem); |
235 | ||
fbfa2cc5 JK |
236 | if (need_cp) { |
237 | /* all the dirty node pages should be flushed for POR */ | |
238 | ret = f2fs_sync_fs(inode->i_sb, 1); | |
d928bfbf | 239 | |
51455b19 CL |
240 | /* |
241 | * We've secured consistency through sync_fs. Following pino | |
242 | * will be used only for fsynced inodes after checkpoint. | |
243 | */ | |
244 | try_to_fix_pino(inode); | |
cff28521 JK |
245 | clear_inode_flag(fi, FI_APPEND_WRITE); |
246 | clear_inode_flag(fi, FI_UPDATE_WRITE); | |
51455b19 CL |
247 | goto out; |
248 | } | |
88bd02c9 | 249 | sync_nodes: |
51455b19 CL |
250 | sync_node_pages(sbi, ino, &wbc); |
251 | ||
871f599f JK |
252 | /* if cp_error was enabled, we should avoid infinite loop */ |
253 | if (unlikely(f2fs_cp_error(sbi))) | |
254 | goto out; | |
255 | ||
51455b19 CL |
256 | if (need_inode_block_update(sbi, ino)) { |
257 | mark_inode_dirty_sync(inode); | |
258 | f2fs_write_inode(inode, NULL); | |
259 | goto sync_nodes; | |
fbfa2cc5 | 260 | } |
51455b19 CL |
261 | |
262 | ret = wait_on_node_pages_writeback(sbi, ino); | |
263 | if (ret) | |
264 | goto out; | |
265 | ||
266 | /* once recovery info is written, don't need to tack this */ | |
267 | remove_dirty_inode(sbi, ino, APPEND_INO); | |
268 | clear_inode_flag(fi, FI_APPEND_WRITE); | |
269 | flush_out: | |
270 | remove_dirty_inode(sbi, ino, UPDATE_INO); | |
271 | clear_inode_flag(fi, FI_UPDATE_WRITE); | |
272 | ret = f2fs_issue_flush(sbi); | |
fbfa2cc5 | 273 | out: |
a2a4a7e4 | 274 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); |
05ca3632 | 275 | f2fs_trace_ios(NULL, 1); |
fbfa2cc5 JK |
276 | return ret; |
277 | } | |
278 | ||
7f7670fe JK |
279 | static pgoff_t __get_first_dirty_index(struct address_space *mapping, |
280 | pgoff_t pgofs, int whence) | |
281 | { | |
282 | struct pagevec pvec; | |
283 | int nr_pages; | |
284 | ||
285 | if (whence != SEEK_DATA) | |
286 | return 0; | |
287 | ||
288 | /* find first dirty page index */ | |
289 | pagevec_init(&pvec, 0); | |
65b85ccc JK |
290 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs, |
291 | PAGECACHE_TAG_DIRTY, 1); | |
292 | pgofs = nr_pages ? pvec.pages[0]->index : LONG_MAX; | |
7f7670fe JK |
293 | pagevec_release(&pvec); |
294 | return pgofs; | |
295 | } | |
296 | ||
297 | static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs, | |
298 | int whence) | |
299 | { | |
300 | switch (whence) { | |
301 | case SEEK_DATA: | |
302 | if ((blkaddr == NEW_ADDR && dirty == pgofs) || | |
303 | (blkaddr != NEW_ADDR && blkaddr != NULL_ADDR)) | |
304 | return true; | |
305 | break; | |
306 | case SEEK_HOLE: | |
307 | if (blkaddr == NULL_ADDR) | |
308 | return true; | |
309 | break; | |
310 | } | |
311 | return false; | |
312 | } | |
313 | ||
267378d4 CY |
314 | static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence) |
315 | { | |
316 | struct inode *inode = file->f_mapping->host; | |
317 | loff_t maxbytes = inode->i_sb->s_maxbytes; | |
318 | struct dnode_of_data dn; | |
7f7670fe JK |
319 | pgoff_t pgofs, end_offset, dirty; |
320 | loff_t data_ofs = offset; | |
321 | loff_t isize; | |
267378d4 CY |
322 | int err = 0; |
323 | ||
324 | mutex_lock(&inode->i_mutex); | |
325 | ||
326 | isize = i_size_read(inode); | |
327 | if (offset >= isize) | |
328 | goto fail; | |
329 | ||
330 | /* handle inline data case */ | |
622f28ae | 331 | if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) { |
267378d4 CY |
332 | if (whence == SEEK_HOLE) |
333 | data_ofs = isize; | |
334 | goto found; | |
335 | } | |
336 | ||
337 | pgofs = (pgoff_t)(offset >> PAGE_CACHE_SHIFT); | |
338 | ||
7f7670fe JK |
339 | dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence); |
340 | ||
267378d4 CY |
341 | for (; data_ofs < isize; data_ofs = pgofs << PAGE_CACHE_SHIFT) { |
342 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
343 | err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE_RA); | |
344 | if (err && err != -ENOENT) { | |
345 | goto fail; | |
346 | } else if (err == -ENOENT) { | |
e1c42045 | 347 | /* direct node does not exists */ |
267378d4 CY |
348 | if (whence == SEEK_DATA) { |
349 | pgofs = PGOFS_OF_NEXT_DNODE(pgofs, | |
350 | F2FS_I(inode)); | |
351 | continue; | |
352 | } else { | |
353 | goto found; | |
354 | } | |
355 | } | |
356 | ||
6b2920a5 | 357 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
267378d4 CY |
358 | |
359 | /* find data/hole in dnode block */ | |
360 | for (; dn.ofs_in_node < end_offset; | |
361 | dn.ofs_in_node++, pgofs++, | |
2e023174 | 362 | data_ofs = (loff_t)pgofs << PAGE_CACHE_SHIFT) { |
267378d4 CY |
363 | block_t blkaddr; |
364 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
365 | ||
7f7670fe | 366 | if (__found_offset(blkaddr, dirty, pgofs, whence)) { |
267378d4 CY |
367 | f2fs_put_dnode(&dn); |
368 | goto found; | |
369 | } | |
370 | } | |
371 | f2fs_put_dnode(&dn); | |
372 | } | |
373 | ||
374 | if (whence == SEEK_DATA) | |
375 | goto fail; | |
267378d4 | 376 | found: |
fe369bc8 JK |
377 | if (whence == SEEK_HOLE && data_ofs > isize) |
378 | data_ofs = isize; | |
267378d4 CY |
379 | mutex_unlock(&inode->i_mutex); |
380 | return vfs_setpos(file, data_ofs, maxbytes); | |
381 | fail: | |
382 | mutex_unlock(&inode->i_mutex); | |
383 | return -ENXIO; | |
384 | } | |
385 | ||
386 | static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence) | |
387 | { | |
388 | struct inode *inode = file->f_mapping->host; | |
389 | loff_t maxbytes = inode->i_sb->s_maxbytes; | |
390 | ||
391 | switch (whence) { | |
392 | case SEEK_SET: | |
393 | case SEEK_CUR: | |
394 | case SEEK_END: | |
395 | return generic_file_llseek_size(file, offset, whence, | |
396 | maxbytes, i_size_read(inode)); | |
397 | case SEEK_DATA: | |
398 | case SEEK_HOLE: | |
0b4c5afd JK |
399 | if (offset < 0) |
400 | return -ENXIO; | |
267378d4 CY |
401 | return f2fs_seek_block(file, offset, whence); |
402 | } | |
403 | ||
404 | return -EINVAL; | |
405 | } | |
406 | ||
fbfa2cc5 JK |
407 | static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma) |
408 | { | |
b3d208f9 JK |
409 | struct inode *inode = file_inode(file); |
410 | ||
411 | /* we don't need to use inline_data strictly */ | |
412 | if (f2fs_has_inline_data(inode)) { | |
413 | int err = f2fs_convert_inline_inode(inode); | |
414 | if (err) | |
415 | return err; | |
416 | } | |
417 | ||
fbfa2cc5 JK |
418 | file_accessed(file); |
419 | vma->vm_ops = &f2fs_file_vm_ops; | |
420 | return 0; | |
421 | } | |
422 | ||
b292dcab | 423 | int truncate_data_blocks_range(struct dnode_of_data *dn, int count) |
fbfa2cc5 JK |
424 | { |
425 | int nr_free = 0, ofs = dn->ofs_in_node; | |
4081363f | 426 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
fbfa2cc5 JK |
427 | struct f2fs_node *raw_node; |
428 | __le32 *addr; | |
429 | ||
45590710 | 430 | raw_node = F2FS_NODE(dn->node_page); |
fbfa2cc5 JK |
431 | addr = blkaddr_in_node(raw_node) + ofs; |
432 | ||
6c311ec6 | 433 | for (; count > 0; count--, addr++, dn->ofs_in_node++) { |
fbfa2cc5 JK |
434 | block_t blkaddr = le32_to_cpu(*addr); |
435 | if (blkaddr == NULL_ADDR) | |
436 | continue; | |
437 | ||
e1509cf2 | 438 | dn->data_blkaddr = NULL_ADDR; |
216a620a | 439 | set_data_blkaddr(dn); |
7e4dde79 | 440 | f2fs_update_extent_cache(dn); |
fbfa2cc5 | 441 | invalidate_blocks(sbi, blkaddr); |
3c6c2beb JK |
442 | if (dn->ofs_in_node == 0 && IS_INODE(dn->node_page)) |
443 | clear_inode_flag(F2FS_I(dn->inode), | |
444 | FI_FIRST_BLOCK_WRITTEN); | |
fbfa2cc5 JK |
445 | nr_free++; |
446 | } | |
447 | if (nr_free) { | |
d7cc950b | 448 | dec_valid_block_count(sbi, dn->inode, nr_free); |
fbfa2cc5 JK |
449 | set_page_dirty(dn->node_page); |
450 | sync_inode_page(dn); | |
451 | } | |
452 | dn->ofs_in_node = ofs; | |
51dd6249 NJ |
453 | |
454 | trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid, | |
455 | dn->ofs_in_node, nr_free); | |
fbfa2cc5 JK |
456 | return nr_free; |
457 | } | |
458 | ||
459 | void truncate_data_blocks(struct dnode_of_data *dn) | |
460 | { | |
461 | truncate_data_blocks_range(dn, ADDRS_PER_BLOCK); | |
462 | } | |
463 | ||
0bfcfcca | 464 | static int truncate_partial_data_page(struct inode *inode, u64 from, |
43f3eae1 | 465 | bool cache_only) |
fbfa2cc5 JK |
466 | { |
467 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
43f3eae1 JK |
468 | pgoff_t index = from >> PAGE_CACHE_SHIFT; |
469 | struct address_space *mapping = inode->i_mapping; | |
fbfa2cc5 JK |
470 | struct page *page; |
471 | ||
43f3eae1 | 472 | if (!offset && !cache_only) |
b3d208f9 | 473 | return 0; |
fbfa2cc5 | 474 | |
43f3eae1 JK |
475 | if (cache_only) { |
476 | page = grab_cache_page(mapping, index); | |
477 | if (page && PageUptodate(page)) | |
478 | goto truncate_out; | |
479 | f2fs_put_page(page, 1); | |
b3d208f9 | 480 | return 0; |
43f3eae1 | 481 | } |
fbfa2cc5 | 482 | |
43f3eae1 JK |
483 | page = get_lock_data_page(inode, index); |
484 | if (IS_ERR(page)) | |
485 | return 0; | |
486 | truncate_out: | |
3cb5ad15 | 487 | f2fs_wait_on_page_writeback(page, DATA); |
fbfa2cc5 | 488 | zero_user(page, offset, PAGE_CACHE_SIZE - offset); |
43f3eae1 | 489 | if (!cache_only) |
0bfcfcca | 490 | set_page_dirty(page); |
fbfa2cc5 | 491 | f2fs_put_page(page, 1); |
b3d208f9 | 492 | return 0; |
fbfa2cc5 JK |
493 | } |
494 | ||
764aa3e9 | 495 | int truncate_blocks(struct inode *inode, u64 from, bool lock) |
fbfa2cc5 | 496 | { |
4081363f | 497 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 JK |
498 | unsigned int blocksize = inode->i_sb->s_blocksize; |
499 | struct dnode_of_data dn; | |
500 | pgoff_t free_from; | |
9ffe0fb5 | 501 | int count = 0, err = 0; |
b3d208f9 | 502 | struct page *ipage; |
0bfcfcca | 503 | bool truncate_page = false; |
fbfa2cc5 | 504 | |
51dd6249 NJ |
505 | trace_f2fs_truncate_blocks_enter(inode, from); |
506 | ||
f7ef9b83 | 507 | free_from = (pgoff_t)F2FS_BYTES_TO_BLK(from + blocksize - 1); |
fbfa2cc5 | 508 | |
764aa3e9 JK |
509 | if (lock) |
510 | f2fs_lock_op(sbi); | |
9ffe0fb5 | 511 | |
b3d208f9 JK |
512 | ipage = get_node_page(sbi, inode->i_ino); |
513 | if (IS_ERR(ipage)) { | |
514 | err = PTR_ERR(ipage); | |
515 | goto out; | |
516 | } | |
517 | ||
518 | if (f2fs_has_inline_data(inode)) { | |
0bfcfcca CY |
519 | if (truncate_inline_inode(ipage, from)) |
520 | set_page_dirty(ipage); | |
b3d208f9 | 521 | f2fs_put_page(ipage, 1); |
0bfcfcca | 522 | truncate_page = true; |
b3d208f9 JK |
523 | goto out; |
524 | } | |
525 | ||
526 | set_new_dnode(&dn, inode, ipage, NULL, 0); | |
266e97a8 | 527 | err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE); |
fbfa2cc5 JK |
528 | if (err) { |
529 | if (err == -ENOENT) | |
530 | goto free_next; | |
b3d208f9 | 531 | goto out; |
1ce86bf6 JK |
532 | } |
533 | ||
6403eb1f | 534 | count = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
fbfa2cc5 JK |
535 | |
536 | count -= dn.ofs_in_node; | |
9850cf4a | 537 | f2fs_bug_on(sbi, count < 0); |
39936837 | 538 | |
fbfa2cc5 JK |
539 | if (dn.ofs_in_node || IS_INODE(dn.node_page)) { |
540 | truncate_data_blocks_range(&dn, count); | |
541 | free_from += count; | |
542 | } | |
543 | ||
544 | f2fs_put_dnode(&dn); | |
545 | free_next: | |
546 | err = truncate_inode_blocks(inode, free_from); | |
764d2c80 JK |
547 | out: |
548 | if (lock) | |
549 | f2fs_unlock_op(sbi); | |
b3d208f9 JK |
550 | |
551 | /* lastly zero out the first data page */ | |
552 | if (!err) | |
0bfcfcca | 553 | err = truncate_partial_data_page(inode, from, truncate_page); |
fbfa2cc5 | 554 | |
51dd6249 | 555 | trace_f2fs_truncate_blocks_exit(inode, err); |
fbfa2cc5 JK |
556 | return err; |
557 | } | |
558 | ||
559 | void f2fs_truncate(struct inode *inode) | |
560 | { | |
561 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
562 | S_ISLNK(inode->i_mode))) | |
563 | return; | |
564 | ||
51dd6249 NJ |
565 | trace_f2fs_truncate(inode); |
566 | ||
92dffd01 | 567 | /* we should check inline_data size */ |
01b960e9 | 568 | if (f2fs_has_inline_data(inode) && !f2fs_may_inline_data(inode)) { |
92dffd01 JK |
569 | if (f2fs_convert_inline_inode(inode)) |
570 | return; | |
571 | } | |
572 | ||
764aa3e9 | 573 | if (!truncate_blocks(inode, i_size_read(inode), true)) { |
fbfa2cc5 JK |
574 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
575 | mark_inode_dirty(inode); | |
576 | } | |
fbfa2cc5 JK |
577 | } |
578 | ||
2d4d9fb5 | 579 | int f2fs_getattr(struct vfsmount *mnt, |
fbfa2cc5 JK |
580 | struct dentry *dentry, struct kstat *stat) |
581 | { | |
2b0143b5 | 582 | struct inode *inode = d_inode(dentry); |
fbfa2cc5 JK |
583 | generic_fillattr(inode, stat); |
584 | stat->blocks <<= 3; | |
585 | return 0; | |
586 | } | |
587 | ||
588 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
589 | static void __setattr_copy(struct inode *inode, const struct iattr *attr) | |
590 | { | |
591 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
592 | unsigned int ia_valid = attr->ia_valid; | |
593 | ||
594 | if (ia_valid & ATTR_UID) | |
595 | inode->i_uid = attr->ia_uid; | |
596 | if (ia_valid & ATTR_GID) | |
597 | inode->i_gid = attr->ia_gid; | |
598 | if (ia_valid & ATTR_ATIME) | |
599 | inode->i_atime = timespec_trunc(attr->ia_atime, | |
600 | inode->i_sb->s_time_gran); | |
601 | if (ia_valid & ATTR_MTIME) | |
602 | inode->i_mtime = timespec_trunc(attr->ia_mtime, | |
603 | inode->i_sb->s_time_gran); | |
604 | if (ia_valid & ATTR_CTIME) | |
605 | inode->i_ctime = timespec_trunc(attr->ia_ctime, | |
606 | inode->i_sb->s_time_gran); | |
607 | if (ia_valid & ATTR_MODE) { | |
608 | umode_t mode = attr->ia_mode; | |
609 | ||
610 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
611 | mode &= ~S_ISGID; | |
612 | set_acl_inode(fi, mode); | |
613 | } | |
614 | } | |
615 | #else | |
616 | #define __setattr_copy setattr_copy | |
617 | #endif | |
618 | ||
619 | int f2fs_setattr(struct dentry *dentry, struct iattr *attr) | |
620 | { | |
2b0143b5 | 621 | struct inode *inode = d_inode(dentry); |
fbfa2cc5 JK |
622 | struct f2fs_inode_info *fi = F2FS_I(inode); |
623 | int err; | |
624 | ||
625 | err = inode_change_ok(inode, attr); | |
626 | if (err) | |
627 | return err; | |
628 | ||
09db6a2e | 629 | if (attr->ia_valid & ATTR_SIZE) { |
09db6a2e CY |
630 | if (attr->ia_size != i_size_read(inode)) { |
631 | truncate_setsize(inode, attr->ia_size); | |
632 | f2fs_truncate(inode); | |
633 | f2fs_balance_fs(F2FS_I_SB(inode)); | |
634 | } else { | |
635 | /* | |
636 | * giving a chance to truncate blocks past EOF which | |
637 | * are fallocated with FALLOC_FL_KEEP_SIZE. | |
638 | */ | |
639 | f2fs_truncate(inode); | |
640 | } | |
fbfa2cc5 JK |
641 | } |
642 | ||
643 | __setattr_copy(inode, attr); | |
644 | ||
645 | if (attr->ia_valid & ATTR_MODE) { | |
a6dda0e6 | 646 | err = posix_acl_chmod(inode, get_inode_mode(inode)); |
fbfa2cc5 JK |
647 | if (err || is_inode_flag_set(fi, FI_ACL_MODE)) { |
648 | inode->i_mode = fi->i_acl_mode; | |
649 | clear_inode_flag(fi, FI_ACL_MODE); | |
650 | } | |
651 | } | |
652 | ||
653 | mark_inode_dirty(inode); | |
654 | return err; | |
655 | } | |
656 | ||
657 | const struct inode_operations f2fs_file_inode_operations = { | |
658 | .getattr = f2fs_getattr, | |
659 | .setattr = f2fs_setattr, | |
660 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 661 | .set_acl = f2fs_set_acl, |
fbfa2cc5 JK |
662 | #ifdef CONFIG_F2FS_FS_XATTR |
663 | .setxattr = generic_setxattr, | |
664 | .getxattr = generic_getxattr, | |
665 | .listxattr = f2fs_listxattr, | |
666 | .removexattr = generic_removexattr, | |
667 | #endif | |
9ab70134 | 668 | .fiemap = f2fs_fiemap, |
fbfa2cc5 JK |
669 | }; |
670 | ||
671 | static void fill_zero(struct inode *inode, pgoff_t index, | |
672 | loff_t start, loff_t len) | |
673 | { | |
4081363f | 674 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 JK |
675 | struct page *page; |
676 | ||
677 | if (!len) | |
678 | return; | |
679 | ||
bd43df02 JK |
680 | f2fs_balance_fs(sbi); |
681 | ||
e479556b | 682 | f2fs_lock_op(sbi); |
64aa7ed9 | 683 | page = get_new_data_page(inode, NULL, index, false); |
e479556b | 684 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
685 | |
686 | if (!IS_ERR(page)) { | |
3cb5ad15 | 687 | f2fs_wait_on_page_writeback(page, DATA); |
fbfa2cc5 JK |
688 | zero_user(page, start, len); |
689 | set_page_dirty(page); | |
690 | f2fs_put_page(page, 1); | |
691 | } | |
692 | } | |
693 | ||
694 | int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) | |
695 | { | |
696 | pgoff_t index; | |
697 | int err; | |
698 | ||
699 | for (index = pg_start; index < pg_end; index++) { | |
700 | struct dnode_of_data dn; | |
9eaeba70 | 701 | |
fbfa2cc5 | 702 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 703 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
fbfa2cc5 | 704 | if (err) { |
fbfa2cc5 JK |
705 | if (err == -ENOENT) |
706 | continue; | |
707 | return err; | |
708 | } | |
709 | ||
710 | if (dn.data_blkaddr != NULL_ADDR) | |
711 | truncate_data_blocks_range(&dn, 1); | |
712 | f2fs_put_dnode(&dn); | |
fbfa2cc5 JK |
713 | } |
714 | return 0; | |
715 | } | |
716 | ||
a66c7b2f | 717 | static int punch_hole(struct inode *inode, loff_t offset, loff_t len) |
fbfa2cc5 JK |
718 | { |
719 | pgoff_t pg_start, pg_end; | |
720 | loff_t off_start, off_end; | |
721 | int ret = 0; | |
722 | ||
14cecc5c CY |
723 | if (!S_ISREG(inode->i_mode)) |
724 | return -EOPNOTSUPP; | |
725 | ||
b3d208f9 JK |
726 | if (f2fs_has_inline_data(inode)) { |
727 | ret = f2fs_convert_inline_inode(inode); | |
728 | if (ret) | |
729 | return ret; | |
730 | } | |
9ffe0fb5 | 731 | |
fbfa2cc5 JK |
732 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; |
733 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
734 | ||
735 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
736 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
737 | ||
738 | if (pg_start == pg_end) { | |
739 | fill_zero(inode, pg_start, off_start, | |
740 | off_end - off_start); | |
741 | } else { | |
742 | if (off_start) | |
743 | fill_zero(inode, pg_start++, off_start, | |
744 | PAGE_CACHE_SIZE - off_start); | |
745 | if (off_end) | |
746 | fill_zero(inode, pg_end, 0, off_end); | |
747 | ||
748 | if (pg_start < pg_end) { | |
749 | struct address_space *mapping = inode->i_mapping; | |
750 | loff_t blk_start, blk_end; | |
4081363f | 751 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
1127a3d4 JH |
752 | |
753 | f2fs_balance_fs(sbi); | |
fbfa2cc5 JK |
754 | |
755 | blk_start = pg_start << PAGE_CACHE_SHIFT; | |
756 | blk_end = pg_end << PAGE_CACHE_SHIFT; | |
757 | truncate_inode_pages_range(mapping, blk_start, | |
758 | blk_end - 1); | |
39936837 | 759 | |
e479556b | 760 | f2fs_lock_op(sbi); |
fbfa2cc5 | 761 | ret = truncate_hole(inode, pg_start, pg_end); |
e479556b | 762 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
763 | } |
764 | } | |
765 | ||
fbfa2cc5 JK |
766 | return ret; |
767 | } | |
768 | ||
b4ace337 CY |
769 | static int f2fs_do_collapse(struct inode *inode, pgoff_t start, pgoff_t end) |
770 | { | |
771 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
772 | struct dnode_of_data dn; | |
773 | pgoff_t nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE; | |
774 | int ret = 0; | |
775 | ||
776 | f2fs_lock_op(sbi); | |
777 | ||
778 | for (; end < nrpages; start++, end++) { | |
779 | block_t new_addr, old_addr; | |
780 | ||
781 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
782 | ret = get_dnode_of_data(&dn, end, LOOKUP_NODE_RA); | |
783 | if (ret && ret != -ENOENT) { | |
784 | goto out; | |
785 | } else if (ret == -ENOENT) { | |
786 | new_addr = NULL_ADDR; | |
787 | } else { | |
788 | new_addr = dn.data_blkaddr; | |
789 | truncate_data_blocks_range(&dn, 1); | |
790 | f2fs_put_dnode(&dn); | |
791 | } | |
792 | ||
793 | if (new_addr == NULL_ADDR) { | |
794 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
795 | ret = get_dnode_of_data(&dn, start, LOOKUP_NODE_RA); | |
796 | if (ret && ret != -ENOENT) | |
797 | goto out; | |
798 | else if (ret == -ENOENT) | |
799 | continue; | |
800 | ||
801 | if (dn.data_blkaddr == NULL_ADDR) { | |
802 | f2fs_put_dnode(&dn); | |
803 | continue; | |
804 | } else { | |
805 | truncate_data_blocks_range(&dn, 1); | |
806 | } | |
807 | ||
808 | f2fs_put_dnode(&dn); | |
809 | } else { | |
810 | struct page *ipage; | |
811 | ||
812 | ipage = get_node_page(sbi, inode->i_ino); | |
813 | if (IS_ERR(ipage)) { | |
814 | ret = PTR_ERR(ipage); | |
815 | goto out; | |
816 | } | |
817 | ||
818 | set_new_dnode(&dn, inode, ipage, NULL, 0); | |
819 | ret = f2fs_reserve_block(&dn, start); | |
820 | if (ret) | |
821 | goto out; | |
822 | ||
823 | old_addr = dn.data_blkaddr; | |
824 | if (old_addr != NEW_ADDR && new_addr == NEW_ADDR) { | |
825 | dn.data_blkaddr = NULL_ADDR; | |
826 | f2fs_update_extent_cache(&dn); | |
827 | invalidate_blocks(sbi, old_addr); | |
828 | ||
829 | dn.data_blkaddr = new_addr; | |
830 | set_data_blkaddr(&dn); | |
831 | } else if (new_addr != NEW_ADDR) { | |
832 | struct node_info ni; | |
833 | struct f2fs_summary sum; | |
834 | ||
835 | get_node_info(sbi, dn.nid, &ni); | |
836 | set_summary(&sum, dn.nid, dn.ofs_in_node, | |
837 | ni.version); | |
838 | ||
839 | f2fs_replace_block(sbi, &sum, old_addr, | |
840 | new_addr, true); | |
841 | ||
842 | dn.data_blkaddr = new_addr; | |
843 | set_data_blkaddr(&dn); | |
844 | f2fs_update_extent_cache(&dn); | |
845 | } | |
846 | ||
847 | f2fs_put_dnode(&dn); | |
848 | } | |
849 | } | |
850 | ret = 0; | |
851 | out: | |
852 | f2fs_unlock_op(sbi); | |
853 | return ret; | |
854 | } | |
855 | ||
856 | static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len) | |
857 | { | |
858 | pgoff_t pg_start, pg_end; | |
859 | loff_t new_size; | |
860 | int ret; | |
861 | ||
862 | if (!S_ISREG(inode->i_mode)) | |
863 | return -EINVAL; | |
864 | ||
865 | if (offset + len >= i_size_read(inode)) | |
866 | return -EINVAL; | |
867 | ||
868 | /* collapse range should be aligned to block size of f2fs. */ | |
869 | if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1)) | |
870 | return -EINVAL; | |
871 | ||
872 | pg_start = offset >> PAGE_CACHE_SHIFT; | |
873 | pg_end = (offset + len) >> PAGE_CACHE_SHIFT; | |
874 | ||
875 | /* write out all dirty pages from offset */ | |
876 | ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); | |
877 | if (ret) | |
878 | return ret; | |
879 | ||
880 | truncate_pagecache(inode, offset); | |
881 | ||
882 | ret = f2fs_do_collapse(inode, pg_start, pg_end); | |
883 | if (ret) | |
884 | return ret; | |
885 | ||
886 | new_size = i_size_read(inode) - len; | |
887 | ||
888 | ret = truncate_blocks(inode, new_size, true); | |
889 | if (!ret) | |
890 | i_size_write(inode, new_size); | |
891 | ||
892 | return ret; | |
893 | } | |
894 | ||
75cd4e09 CY |
895 | static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len, |
896 | int mode) | |
897 | { | |
898 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
899 | struct address_space *mapping = inode->i_mapping; | |
900 | pgoff_t index, pg_start, pg_end; | |
901 | loff_t new_size = i_size_read(inode); | |
902 | loff_t off_start, off_end; | |
903 | int ret = 0; | |
904 | ||
905 | if (!S_ISREG(inode->i_mode)) | |
906 | return -EINVAL; | |
907 | ||
908 | ret = inode_newsize_ok(inode, (len + offset)); | |
909 | if (ret) | |
910 | return ret; | |
911 | ||
912 | f2fs_balance_fs(sbi); | |
913 | ||
914 | if (f2fs_has_inline_data(inode)) { | |
915 | ret = f2fs_convert_inline_inode(inode); | |
916 | if (ret) | |
917 | return ret; | |
918 | } | |
919 | ||
920 | ret = filemap_write_and_wait_range(mapping, offset, offset + len - 1); | |
921 | if (ret) | |
922 | return ret; | |
923 | ||
924 | truncate_pagecache_range(inode, offset, offset + len - 1); | |
925 | ||
926 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; | |
927 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
928 | ||
929 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
930 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
931 | ||
932 | if (pg_start == pg_end) { | |
933 | fill_zero(inode, pg_start, off_start, off_end - off_start); | |
934 | if (offset + len > new_size) | |
935 | new_size = offset + len; | |
936 | new_size = max_t(loff_t, new_size, offset + len); | |
937 | } else { | |
938 | if (off_start) { | |
939 | fill_zero(inode, pg_start++, off_start, | |
940 | PAGE_CACHE_SIZE - off_start); | |
941 | new_size = max_t(loff_t, new_size, | |
942 | pg_start << PAGE_CACHE_SHIFT); | |
943 | } | |
944 | ||
945 | for (index = pg_start; index < pg_end; index++) { | |
946 | struct dnode_of_data dn; | |
947 | struct page *ipage; | |
948 | ||
949 | f2fs_lock_op(sbi); | |
950 | ||
951 | ipage = get_node_page(sbi, inode->i_ino); | |
952 | if (IS_ERR(ipage)) { | |
953 | ret = PTR_ERR(ipage); | |
954 | f2fs_unlock_op(sbi); | |
955 | goto out; | |
956 | } | |
957 | ||
958 | set_new_dnode(&dn, inode, ipage, NULL, 0); | |
959 | ret = f2fs_reserve_block(&dn, index); | |
960 | if (ret) { | |
961 | f2fs_unlock_op(sbi); | |
962 | goto out; | |
963 | } | |
964 | ||
965 | if (dn.data_blkaddr != NEW_ADDR) { | |
966 | invalidate_blocks(sbi, dn.data_blkaddr); | |
967 | ||
968 | dn.data_blkaddr = NEW_ADDR; | |
969 | set_data_blkaddr(&dn); | |
970 | ||
971 | dn.data_blkaddr = NULL_ADDR; | |
972 | f2fs_update_extent_cache(&dn); | |
973 | } | |
974 | f2fs_put_dnode(&dn); | |
975 | f2fs_unlock_op(sbi); | |
976 | ||
977 | new_size = max_t(loff_t, new_size, | |
978 | (index + 1) << PAGE_CACHE_SHIFT); | |
979 | } | |
980 | ||
981 | if (off_end) { | |
982 | fill_zero(inode, pg_end, 0, off_end); | |
983 | new_size = max_t(loff_t, new_size, offset + len); | |
984 | } | |
985 | } | |
986 | ||
987 | out: | |
988 | if (!(mode & FALLOC_FL_KEEP_SIZE) && i_size_read(inode) < new_size) { | |
989 | i_size_write(inode, new_size); | |
990 | mark_inode_dirty(inode); | |
991 | update_inode_page(inode); | |
992 | } | |
993 | ||
994 | return ret; | |
995 | } | |
996 | ||
fbfa2cc5 JK |
997 | static int expand_inode_data(struct inode *inode, loff_t offset, |
998 | loff_t len, int mode) | |
999 | { | |
4081363f | 1000 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 JK |
1001 | pgoff_t index, pg_start, pg_end; |
1002 | loff_t new_size = i_size_read(inode); | |
1003 | loff_t off_start, off_end; | |
1004 | int ret = 0; | |
1005 | ||
497a0930 CY |
1006 | f2fs_balance_fs(sbi); |
1007 | ||
fbfa2cc5 JK |
1008 | ret = inode_newsize_ok(inode, (len + offset)); |
1009 | if (ret) | |
1010 | return ret; | |
1011 | ||
b3d208f9 JK |
1012 | if (f2fs_has_inline_data(inode)) { |
1013 | ret = f2fs_convert_inline_inode(inode); | |
1014 | if (ret) | |
1015 | return ret; | |
1016 | } | |
9e09fc85 | 1017 | |
fbfa2cc5 JK |
1018 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; |
1019 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
1020 | ||
1021 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
1022 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
1023 | ||
ead43275 JK |
1024 | f2fs_lock_op(sbi); |
1025 | ||
fbfa2cc5 JK |
1026 | for (index = pg_start; index <= pg_end; index++) { |
1027 | struct dnode_of_data dn; | |
1028 | ||
98397ff3 JK |
1029 | if (index == pg_end && !off_end) |
1030 | goto noalloc; | |
1031 | ||
fbfa2cc5 | 1032 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
b600965c | 1033 | ret = f2fs_reserve_block(&dn, index); |
b600965c | 1034 | if (ret) |
fbfa2cc5 | 1035 | break; |
98397ff3 | 1036 | noalloc: |
fbfa2cc5 JK |
1037 | if (pg_start == pg_end) |
1038 | new_size = offset + len; | |
1039 | else if (index == pg_start && off_start) | |
1040 | new_size = (index + 1) << PAGE_CACHE_SHIFT; | |
1041 | else if (index == pg_end) | |
1042 | new_size = (index << PAGE_CACHE_SHIFT) + off_end; | |
1043 | else | |
1044 | new_size += PAGE_CACHE_SIZE; | |
1045 | } | |
1046 | ||
1047 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
1048 | i_size_read(inode) < new_size) { | |
1049 | i_size_write(inode, new_size); | |
1050 | mark_inode_dirty(inode); | |
ead43275 | 1051 | update_inode_page(inode); |
fbfa2cc5 | 1052 | } |
ead43275 | 1053 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
1054 | |
1055 | return ret; | |
1056 | } | |
1057 | ||
1058 | static long f2fs_fallocate(struct file *file, int mode, | |
1059 | loff_t offset, loff_t len) | |
1060 | { | |
6131ffaa | 1061 | struct inode *inode = file_inode(file); |
587c0a42 | 1062 | long ret = 0; |
fbfa2cc5 | 1063 | |
b4ace337 | 1064 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE | |
75cd4e09 | 1065 | FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE)) |
fbfa2cc5 JK |
1066 | return -EOPNOTSUPP; |
1067 | ||
3375f696 CY |
1068 | mutex_lock(&inode->i_mutex); |
1069 | ||
587c0a42 TY |
1070 | if (mode & FALLOC_FL_PUNCH_HOLE) { |
1071 | if (offset >= inode->i_size) | |
1072 | goto out; | |
1073 | ||
a66c7b2f | 1074 | ret = punch_hole(inode, offset, len); |
b4ace337 CY |
1075 | } else if (mode & FALLOC_FL_COLLAPSE_RANGE) { |
1076 | ret = f2fs_collapse_range(inode, offset, len); | |
75cd4e09 CY |
1077 | } else if (mode & FALLOC_FL_ZERO_RANGE) { |
1078 | ret = f2fs_zero_range(inode, offset, len, mode); | |
b4ace337 | 1079 | } else { |
fbfa2cc5 | 1080 | ret = expand_inode_data(inode, offset, len, mode); |
b4ace337 | 1081 | } |
fbfa2cc5 | 1082 | |
3af60a49 NJ |
1083 | if (!ret) { |
1084 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
1085 | mark_inode_dirty(inode); | |
1086 | } | |
3375f696 | 1087 | |
587c0a42 | 1088 | out: |
3375f696 CY |
1089 | mutex_unlock(&inode->i_mutex); |
1090 | ||
c01e2853 | 1091 | trace_f2fs_fallocate(inode, mode, offset, len, ret); |
fbfa2cc5 JK |
1092 | return ret; |
1093 | } | |
1094 | ||
1e84371f JK |
1095 | static int f2fs_release_file(struct inode *inode, struct file *filp) |
1096 | { | |
1097 | /* some remained atomic pages should discarded */ | |
1098 | if (f2fs_is_atomic_file(inode)) | |
1099 | commit_inmem_pages(inode, true); | |
1100 | if (f2fs_is_volatile_file(inode)) { | |
1101 | set_inode_flag(F2FS_I(inode), FI_DROP_CACHE); | |
1102 | filemap_fdatawrite(inode->i_mapping); | |
1103 | clear_inode_flag(F2FS_I(inode), FI_DROP_CACHE); | |
1104 | } | |
1105 | return 0; | |
1106 | } | |
1107 | ||
fbfa2cc5 JK |
1108 | #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL)) |
1109 | #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL) | |
1110 | ||
1111 | static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags) | |
1112 | { | |
1113 | if (S_ISDIR(mode)) | |
1114 | return flags; | |
1115 | else if (S_ISREG(mode)) | |
1116 | return flags & F2FS_REG_FLMASK; | |
1117 | else | |
1118 | return flags & F2FS_OTHER_FLMASK; | |
1119 | } | |
1120 | ||
52656e6c | 1121 | static int f2fs_ioc_getflags(struct file *filp, unsigned long arg) |
fbfa2cc5 | 1122 | { |
6131ffaa | 1123 | struct inode *inode = file_inode(filp); |
fbfa2cc5 | 1124 | struct f2fs_inode_info *fi = F2FS_I(inode); |
52656e6c JK |
1125 | unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE; |
1126 | return put_user(flags, (int __user *)arg); | |
1127 | } | |
fbfa2cc5 | 1128 | |
52656e6c JK |
1129 | static int f2fs_ioc_setflags(struct file *filp, unsigned long arg) |
1130 | { | |
1131 | struct inode *inode = file_inode(filp); | |
1132 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
1133 | unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE; | |
1134 | unsigned int oldflags; | |
1135 | int ret; | |
fbfa2cc5 | 1136 | |
52656e6c JK |
1137 | ret = mnt_want_write_file(filp); |
1138 | if (ret) | |
1139 | return ret; | |
fbfa2cc5 | 1140 | |
52656e6c JK |
1141 | if (!inode_owner_or_capable(inode)) { |
1142 | ret = -EACCES; | |
1143 | goto out; | |
1144 | } | |
fbfa2cc5 | 1145 | |
52656e6c JK |
1146 | if (get_user(flags, (int __user *)arg)) { |
1147 | ret = -EFAULT; | |
1148 | goto out; | |
1149 | } | |
fbfa2cc5 | 1150 | |
52656e6c | 1151 | flags = f2fs_mask_flags(inode->i_mode, flags); |
fbfa2cc5 | 1152 | |
52656e6c | 1153 | mutex_lock(&inode->i_mutex); |
fbfa2cc5 | 1154 | |
52656e6c | 1155 | oldflags = fi->i_flags; |
fbfa2cc5 | 1156 | |
52656e6c JK |
1157 | if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { |
1158 | if (!capable(CAP_LINUX_IMMUTABLE)) { | |
1159 | mutex_unlock(&inode->i_mutex); | |
1160 | ret = -EPERM; | |
1161 | goto out; | |
fbfa2cc5 | 1162 | } |
52656e6c | 1163 | } |
fbfa2cc5 | 1164 | |
52656e6c JK |
1165 | flags = flags & FS_FL_USER_MODIFIABLE; |
1166 | flags |= oldflags & ~FS_FL_USER_MODIFIABLE; | |
1167 | fi->i_flags = flags; | |
1168 | mutex_unlock(&inode->i_mutex); | |
fbfa2cc5 | 1169 | |
52656e6c JK |
1170 | f2fs_set_inode_flags(inode); |
1171 | inode->i_ctime = CURRENT_TIME; | |
1172 | mark_inode_dirty(inode); | |
fbfa2cc5 | 1173 | out: |
52656e6c JK |
1174 | mnt_drop_write_file(filp); |
1175 | return ret; | |
1176 | } | |
4b2fecc8 | 1177 | |
d49f3e89 CY |
1178 | static int f2fs_ioc_getversion(struct file *filp, unsigned long arg) |
1179 | { | |
1180 | struct inode *inode = file_inode(filp); | |
1181 | ||
1182 | return put_user(inode->i_generation, (int __user *)arg); | |
1183 | } | |
1184 | ||
88b88a66 JK |
1185 | static int f2fs_ioc_start_atomic_write(struct file *filp) |
1186 | { | |
1187 | struct inode *inode = file_inode(filp); | |
88b88a66 JK |
1188 | |
1189 | if (!inode_owner_or_capable(inode)) | |
1190 | return -EACCES; | |
1191 | ||
1e84371f JK |
1192 | f2fs_balance_fs(F2FS_I_SB(inode)); |
1193 | ||
1194 | if (f2fs_is_atomic_file(inode)) | |
1195 | return 0; | |
88b88a66 JK |
1196 | |
1197 | set_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); | |
1198 | ||
b3d208f9 | 1199 | return f2fs_convert_inline_inode(inode); |
88b88a66 JK |
1200 | } |
1201 | ||
1202 | static int f2fs_ioc_commit_atomic_write(struct file *filp) | |
1203 | { | |
1204 | struct inode *inode = file_inode(filp); | |
1205 | int ret; | |
1206 | ||
1207 | if (!inode_owner_or_capable(inode)) | |
1208 | return -EACCES; | |
1209 | ||
02a1335f JK |
1210 | if (f2fs_is_volatile_file(inode)) |
1211 | return 0; | |
1212 | ||
88b88a66 JK |
1213 | ret = mnt_want_write_file(filp); |
1214 | if (ret) | |
1215 | return ret; | |
1216 | ||
1217 | if (f2fs_is_atomic_file(inode)) | |
1218 | commit_inmem_pages(inode, false); | |
1219 | ||
1220 | ret = f2fs_sync_file(filp, 0, LONG_MAX, 0); | |
1221 | mnt_drop_write_file(filp); | |
1e84371f | 1222 | clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); |
88b88a66 JK |
1223 | return ret; |
1224 | } | |
1225 | ||
02a1335f JK |
1226 | static int f2fs_ioc_start_volatile_write(struct file *filp) |
1227 | { | |
1228 | struct inode *inode = file_inode(filp); | |
1229 | ||
1230 | if (!inode_owner_or_capable(inode)) | |
1231 | return -EACCES; | |
1232 | ||
1e84371f JK |
1233 | if (f2fs_is_volatile_file(inode)) |
1234 | return 0; | |
1235 | ||
02a1335f | 1236 | set_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE); |
b3d208f9 JK |
1237 | |
1238 | return f2fs_convert_inline_inode(inode); | |
02a1335f JK |
1239 | } |
1240 | ||
1e84371f JK |
1241 | static int f2fs_ioc_release_volatile_write(struct file *filp) |
1242 | { | |
1243 | struct inode *inode = file_inode(filp); | |
1244 | ||
1245 | if (!inode_owner_or_capable(inode)) | |
1246 | return -EACCES; | |
1247 | ||
1248 | if (!f2fs_is_volatile_file(inode)) | |
1249 | return 0; | |
1250 | ||
3c6c2beb JK |
1251 | if (!f2fs_is_first_block_written(inode)) |
1252 | return truncate_partial_data_page(inode, 0, true); | |
1253 | ||
1e84371f JK |
1254 | punch_hole(inode, 0, F2FS_BLKSIZE); |
1255 | return 0; | |
1256 | } | |
1257 | ||
1258 | static int f2fs_ioc_abort_volatile_write(struct file *filp) | |
1259 | { | |
1260 | struct inode *inode = file_inode(filp); | |
1261 | int ret; | |
1262 | ||
1263 | if (!inode_owner_or_capable(inode)) | |
1264 | return -EACCES; | |
1265 | ||
1266 | ret = mnt_want_write_file(filp); | |
1267 | if (ret) | |
1268 | return ret; | |
1269 | ||
1270 | f2fs_balance_fs(F2FS_I_SB(inode)); | |
1271 | ||
1272 | if (f2fs_is_atomic_file(inode)) { | |
1273 | commit_inmem_pages(inode, false); | |
1274 | clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); | |
1275 | } | |
1276 | ||
1277 | if (f2fs_is_volatile_file(inode)) { | |
1278 | clear_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE); | |
1279 | filemap_fdatawrite(inode->i_mapping); | |
1280 | set_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE); | |
1281 | } | |
1282 | mnt_drop_write_file(filp); | |
1283 | return ret; | |
1284 | } | |
1285 | ||
1abff93d JK |
1286 | static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg) |
1287 | { | |
1288 | struct inode *inode = file_inode(filp); | |
1289 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1290 | struct super_block *sb = sbi->sb; | |
1291 | __u32 in; | |
1292 | ||
1293 | if (!capable(CAP_SYS_ADMIN)) | |
1294 | return -EPERM; | |
1295 | ||
1296 | if (get_user(in, (__u32 __user *)arg)) | |
1297 | return -EFAULT; | |
1298 | ||
1299 | switch (in) { | |
1300 | case F2FS_GOING_DOWN_FULLSYNC: | |
1301 | sb = freeze_bdev(sb->s_bdev); | |
1302 | if (sb && !IS_ERR(sb)) { | |
1303 | f2fs_stop_checkpoint(sbi); | |
1304 | thaw_bdev(sb->s_bdev, sb); | |
1305 | } | |
1306 | break; | |
1307 | case F2FS_GOING_DOWN_METASYNC: | |
1308 | /* do checkpoint only */ | |
1309 | f2fs_sync_fs(sb, 1); | |
1310 | f2fs_stop_checkpoint(sbi); | |
1311 | break; | |
1312 | case F2FS_GOING_DOWN_NOSYNC: | |
1313 | f2fs_stop_checkpoint(sbi); | |
1314 | break; | |
1315 | default: | |
1316 | return -EINVAL; | |
1317 | } | |
1318 | return 0; | |
1319 | } | |
1320 | ||
52656e6c JK |
1321 | static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg) |
1322 | { | |
1323 | struct inode *inode = file_inode(filp); | |
1324 | struct super_block *sb = inode->i_sb; | |
1325 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
1326 | struct fstrim_range range; | |
1327 | int ret; | |
4b2fecc8 | 1328 | |
52656e6c JK |
1329 | if (!capable(CAP_SYS_ADMIN)) |
1330 | return -EPERM; | |
4b2fecc8 | 1331 | |
52656e6c JK |
1332 | if (!blk_queue_discard(q)) |
1333 | return -EOPNOTSUPP; | |
4b2fecc8 | 1334 | |
52656e6c JK |
1335 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
1336 | sizeof(range))) | |
1337 | return -EFAULT; | |
4b2fecc8 | 1338 | |
52656e6c JK |
1339 | range.minlen = max((unsigned int)range.minlen, |
1340 | q->limits.discard_granularity); | |
1341 | ret = f2fs_trim_fs(F2FS_SB(sb), &range); | |
1342 | if (ret < 0) | |
1343 | return ret; | |
4b2fecc8 | 1344 | |
52656e6c JK |
1345 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
1346 | sizeof(range))) | |
1347 | return -EFAULT; | |
1348 | return 0; | |
1349 | } | |
1350 | ||
f424f664 JK |
1351 | static bool uuid_is_nonzero(__u8 u[16]) |
1352 | { | |
1353 | int i; | |
1354 | ||
1355 | for (i = 0; i < 16; i++) | |
1356 | if (u[i]) | |
1357 | return true; | |
1358 | return false; | |
1359 | } | |
1360 | ||
1361 | static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg) | |
1362 | { | |
1363 | #ifdef CONFIG_F2FS_FS_ENCRYPTION | |
1364 | struct f2fs_encryption_policy policy; | |
1365 | struct inode *inode = file_inode(filp); | |
1366 | ||
1367 | if (copy_from_user(&policy, (struct f2fs_encryption_policy __user *)arg, | |
1368 | sizeof(policy))) | |
1369 | return -EFAULT; | |
1370 | ||
1371 | if (f2fs_has_inline_data(inode)) { | |
1372 | int ret = f2fs_convert_inline_inode(inode); | |
1373 | if (ret) | |
1374 | return ret; | |
1375 | } | |
1376 | ||
1377 | return f2fs_process_policy(&policy, inode); | |
1378 | #else | |
1379 | return -EOPNOTSUPP; | |
1380 | #endif | |
1381 | } | |
1382 | ||
1383 | static int f2fs_ioc_get_encryption_policy(struct file *filp, unsigned long arg) | |
1384 | { | |
1385 | #ifdef CONFIG_F2FS_FS_ENCRYPTION | |
1386 | struct f2fs_encryption_policy policy; | |
1387 | struct inode *inode = file_inode(filp); | |
1388 | int err; | |
1389 | ||
1390 | err = f2fs_get_policy(inode, &policy); | |
1391 | if (err) | |
1392 | return err; | |
1393 | ||
1394 | if (copy_to_user((struct f2fs_encryption_policy __user *)arg, &policy, | |
1395 | sizeof(policy))) | |
1396 | return -EFAULT; | |
1397 | return 0; | |
1398 | #else | |
1399 | return -EOPNOTSUPP; | |
1400 | #endif | |
1401 | } | |
1402 | ||
1403 | static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg) | |
1404 | { | |
1405 | struct inode *inode = file_inode(filp); | |
1406 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1407 | int err; | |
1408 | ||
1409 | if (!f2fs_sb_has_crypto(inode->i_sb)) | |
1410 | return -EOPNOTSUPP; | |
1411 | ||
1412 | if (uuid_is_nonzero(sbi->raw_super->encrypt_pw_salt)) | |
1413 | goto got_it; | |
1414 | ||
1415 | err = mnt_want_write_file(filp); | |
1416 | if (err) | |
1417 | return err; | |
1418 | ||
1419 | /* update superblock with uuid */ | |
1420 | generate_random_uuid(sbi->raw_super->encrypt_pw_salt); | |
1421 | ||
1422 | err = f2fs_commit_super(sbi); | |
1423 | ||
1424 | mnt_drop_write_file(filp); | |
1425 | if (err) { | |
1426 | /* undo new data */ | |
1427 | memset(sbi->raw_super->encrypt_pw_salt, 0, 16); | |
1428 | return err; | |
1429 | } | |
1430 | got_it: | |
1431 | if (copy_to_user((__u8 __user *)arg, sbi->raw_super->encrypt_pw_salt, | |
1432 | 16)) | |
1433 | return -EFAULT; | |
1434 | return 0; | |
1435 | } | |
1436 | ||
52656e6c JK |
1437 | long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
1438 | { | |
1439 | switch (cmd) { | |
1440 | case F2FS_IOC_GETFLAGS: | |
1441 | return f2fs_ioc_getflags(filp, arg); | |
1442 | case F2FS_IOC_SETFLAGS: | |
1443 | return f2fs_ioc_setflags(filp, arg); | |
d49f3e89 CY |
1444 | case F2FS_IOC_GETVERSION: |
1445 | return f2fs_ioc_getversion(filp, arg); | |
88b88a66 JK |
1446 | case F2FS_IOC_START_ATOMIC_WRITE: |
1447 | return f2fs_ioc_start_atomic_write(filp); | |
1448 | case F2FS_IOC_COMMIT_ATOMIC_WRITE: | |
1449 | return f2fs_ioc_commit_atomic_write(filp); | |
02a1335f JK |
1450 | case F2FS_IOC_START_VOLATILE_WRITE: |
1451 | return f2fs_ioc_start_volatile_write(filp); | |
1e84371f JK |
1452 | case F2FS_IOC_RELEASE_VOLATILE_WRITE: |
1453 | return f2fs_ioc_release_volatile_write(filp); | |
1454 | case F2FS_IOC_ABORT_VOLATILE_WRITE: | |
1455 | return f2fs_ioc_abort_volatile_write(filp); | |
1abff93d JK |
1456 | case F2FS_IOC_SHUTDOWN: |
1457 | return f2fs_ioc_shutdown(filp, arg); | |
52656e6c JK |
1458 | case FITRIM: |
1459 | return f2fs_ioc_fitrim(filp, arg); | |
f424f664 JK |
1460 | case F2FS_IOC_SET_ENCRYPTION_POLICY: |
1461 | return f2fs_ioc_set_encryption_policy(filp, arg); | |
1462 | case F2FS_IOC_GET_ENCRYPTION_POLICY: | |
1463 | return f2fs_ioc_get_encryption_policy(filp, arg); | |
1464 | case F2FS_IOC_GET_ENCRYPTION_PWSALT: | |
1465 | return f2fs_ioc_get_encryption_pwsalt(filp, arg); | |
fbfa2cc5 JK |
1466 | default: |
1467 | return -ENOTTY; | |
1468 | } | |
1469 | } | |
1470 | ||
e9750824 NJ |
1471 | #ifdef CONFIG_COMPAT |
1472 | long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
1473 | { | |
1474 | switch (cmd) { | |
1475 | case F2FS_IOC32_GETFLAGS: | |
1476 | cmd = F2FS_IOC_GETFLAGS; | |
1477 | break; | |
1478 | case F2FS_IOC32_SETFLAGS: | |
1479 | cmd = F2FS_IOC_SETFLAGS; | |
1480 | break; | |
1481 | default: | |
1482 | return -ENOIOCTLCMD; | |
1483 | } | |
1484 | return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); | |
1485 | } | |
1486 | #endif | |
1487 | ||
fbfa2cc5 | 1488 | const struct file_operations f2fs_file_operations = { |
267378d4 | 1489 | .llseek = f2fs_llseek, |
aad4f8bb | 1490 | .read_iter = generic_file_read_iter, |
8174202b | 1491 | .write_iter = generic_file_write_iter, |
fbfa2cc5 | 1492 | .open = generic_file_open, |
12662234 | 1493 | .release = f2fs_release_file, |
fbfa2cc5 JK |
1494 | .mmap = f2fs_file_mmap, |
1495 | .fsync = f2fs_sync_file, | |
1496 | .fallocate = f2fs_fallocate, | |
1497 | .unlocked_ioctl = f2fs_ioctl, | |
e9750824 NJ |
1498 | #ifdef CONFIG_COMPAT |
1499 | .compat_ioctl = f2fs_compat_ioctl, | |
1500 | #endif | |
fbfa2cc5 | 1501 | .splice_read = generic_file_splice_read, |
8d020765 | 1502 | .splice_write = iter_file_splice_write, |
fbfa2cc5 | 1503 | }; |