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" | |
c1c1b583 | 30 | #include "gc.h" |
db9f7c1a | 31 | #include "trace.h" |
a2a4a7e4 | 32 | #include <trace/events/f2fs.h> |
fbfa2cc5 JK |
33 | |
34 | static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma, | |
35 | struct vm_fault *vmf) | |
36 | { | |
37 | struct page *page = vmf->page; | |
6131ffaa | 38 | struct inode *inode = file_inode(vma->vm_file); |
4081363f | 39 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 | 40 | struct dnode_of_data dn; |
e479556b | 41 | int err; |
fbfa2cc5 JK |
42 | |
43 | f2fs_balance_fs(sbi); | |
44 | ||
45 | sb_start_pagefault(inode->i_sb); | |
b3d208f9 JK |
46 | |
47 | f2fs_bug_on(sbi, f2fs_has_inline_data(inode)); | |
b067ba1f | 48 | |
fbfa2cc5 | 49 | /* block allocation */ |
e479556b | 50 | f2fs_lock_op(sbi); |
b3d208f9 | 51 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
b600965c | 52 | err = f2fs_reserve_block(&dn, page->index); |
9ba69cf9 JK |
53 | if (err) { |
54 | f2fs_unlock_op(sbi); | |
b600965c | 55 | goto out; |
9ba69cf9 JK |
56 | } |
57 | f2fs_put_dnode(&dn); | |
58 | f2fs_unlock_op(sbi); | |
fbfa2cc5 | 59 | |
9851e6e1 | 60 | file_update_time(vma->vm_file); |
fbfa2cc5 | 61 | lock_page(page); |
6bacf52f | 62 | if (unlikely(page->mapping != inode->i_mapping || |
9851e6e1 | 63 | page_offset(page) > i_size_read(inode) || |
6bacf52f | 64 | !PageUptodate(page))) { |
fbfa2cc5 JK |
65 | unlock_page(page); |
66 | err = -EFAULT; | |
67 | goto out; | |
68 | } | |
69 | ||
70 | /* | |
71 | * check to see if the page is mapped already (no holes) | |
72 | */ | |
73 | if (PageMappedToDisk(page)) | |
9851e6e1 | 74 | goto mapped; |
fbfa2cc5 JK |
75 | |
76 | /* page is wholly or partially inside EOF */ | |
77 | if (((page->index + 1) << PAGE_CACHE_SHIFT) > i_size_read(inode)) { | |
78 | unsigned offset; | |
79 | offset = i_size_read(inode) & ~PAGE_CACHE_MASK; | |
80 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
81 | } | |
82 | set_page_dirty(page); | |
83 | SetPageUptodate(page); | |
84 | ||
e943a10d | 85 | trace_f2fs_vm_page_mkwrite(page, DATA); |
9851e6e1 NJ |
86 | mapped: |
87 | /* fill the page */ | |
3cb5ad15 | 88 | f2fs_wait_on_page_writeback(page, DATA); |
5b339124 CY |
89 | /* if gced page is attached, don't write to cold segment */ |
90 | clear_cold_data(page); | |
fbfa2cc5 JK |
91 | out: |
92 | sb_end_pagefault(inode->i_sb); | |
93 | return block_page_mkwrite_return(err); | |
94 | } | |
95 | ||
96 | static const struct vm_operations_struct f2fs_file_vm_ops = { | |
692bb55d | 97 | .fault = filemap_fault, |
f1820361 | 98 | .map_pages = filemap_map_pages, |
692bb55d | 99 | .page_mkwrite = f2fs_vm_page_mkwrite, |
fbfa2cc5 JK |
100 | }; |
101 | ||
354a3399 JK |
102 | static int get_parent_ino(struct inode *inode, nid_t *pino) |
103 | { | |
104 | struct dentry *dentry; | |
105 | ||
106 | inode = igrab(inode); | |
107 | dentry = d_find_any_alias(inode); | |
108 | iput(inode); | |
109 | if (!dentry) | |
110 | return 0; | |
111 | ||
e7d55452 | 112 | if (update_dent_inode(inode, inode, &dentry->d_name)) { |
f0947e5c JK |
113 | dput(dentry); |
114 | return 0; | |
115 | } | |
354a3399 | 116 | |
f0947e5c JK |
117 | *pino = parent_ino(dentry); |
118 | dput(dentry); | |
354a3399 JK |
119 | return 1; |
120 | } | |
121 | ||
9d1589ef CY |
122 | static inline bool need_do_checkpoint(struct inode *inode) |
123 | { | |
4081363f | 124 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
9d1589ef CY |
125 | bool need_cp = false; |
126 | ||
127 | if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1) | |
128 | need_cp = true; | |
e7d55452 JK |
129 | else if (file_enc_name(inode) && need_dentry_mark(sbi, inode->i_ino)) |
130 | need_cp = true; | |
9d1589ef CY |
131 | else if (file_wrong_pino(inode)) |
132 | need_cp = true; | |
133 | else if (!space_for_roll_forward(sbi)) | |
134 | need_cp = true; | |
135 | else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino)) | |
136 | need_cp = true; | |
137 | else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi))) | |
138 | need_cp = true; | |
d5053a34 JK |
139 | else if (test_opt(sbi, FASTBOOT)) |
140 | need_cp = true; | |
a344b9fd JK |
141 | else if (sbi->active_logs == 2) |
142 | need_cp = true; | |
9d1589ef CY |
143 | |
144 | return need_cp; | |
145 | } | |
146 | ||
9c7bb702 CL |
147 | static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino) |
148 | { | |
149 | struct page *i = find_get_page(NODE_MAPPING(sbi), ino); | |
150 | bool ret = false; | |
151 | /* But we need to avoid that there are some inode updates */ | |
152 | if ((i && PageDirty(i)) || need_inode_block_update(sbi, ino)) | |
153 | ret = true; | |
154 | f2fs_put_page(i, 0); | |
155 | return ret; | |
156 | } | |
157 | ||
51455b19 CL |
158 | static void try_to_fix_pino(struct inode *inode) |
159 | { | |
160 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
161 | nid_t pino; | |
162 | ||
163 | down_write(&fi->i_sem); | |
164 | fi->xattr_ver = 0; | |
165 | if (file_wrong_pino(inode) && inode->i_nlink == 1 && | |
166 | get_parent_ino(inode, &pino)) { | |
167 | fi->i_pino = pino; | |
168 | file_got_pino(inode); | |
169 | up_write(&fi->i_sem); | |
170 | ||
171 | mark_inode_dirty_sync(inode); | |
172 | f2fs_write_inode(inode, NULL); | |
173 | } else { | |
174 | up_write(&fi->i_sem); | |
175 | } | |
176 | } | |
177 | ||
fbfa2cc5 JK |
178 | int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) |
179 | { | |
180 | struct inode *inode = file->f_mapping->host; | |
d928bfbf | 181 | struct f2fs_inode_info *fi = F2FS_I(inode); |
4081363f | 182 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
2403c155 | 183 | nid_t ino = inode->i_ino; |
fbfa2cc5 JK |
184 | int ret = 0; |
185 | bool need_cp = false; | |
186 | struct writeback_control wbc = { | |
c81bf1c8 | 187 | .sync_mode = WB_SYNC_ALL, |
fbfa2cc5 JK |
188 | .nr_to_write = LONG_MAX, |
189 | .for_reclaim = 0, | |
190 | }; | |
191 | ||
6bacf52f | 192 | if (unlikely(f2fs_readonly(inode->i_sb))) |
1fa95b0b NJ |
193 | return 0; |
194 | ||
a2a4a7e4 | 195 | trace_f2fs_sync_file_enter(inode); |
ea1aa12c JK |
196 | |
197 | /* if fdatasync is triggered, let's do in-place-update */ | |
c1ce1b02 | 198 | if (get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks) |
ea1aa12c | 199 | set_inode_flag(fi, FI_NEED_IPU); |
fbfa2cc5 | 200 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
c1ce1b02 JK |
201 | clear_inode_flag(fi, FI_NEED_IPU); |
202 | ||
a2a4a7e4 NJ |
203 | if (ret) { |
204 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); | |
fbfa2cc5 | 205 | return ret; |
a2a4a7e4 | 206 | } |
fbfa2cc5 | 207 | |
9c7bb702 | 208 | /* if the inode is dirty, let's recover all the time */ |
2286c020 JK |
209 | if (!datasync) { |
210 | f2fs_write_inode(inode, NULL); | |
9c7bb702 CL |
211 | goto go_write; |
212 | } | |
213 | ||
6d99ba41 JK |
214 | /* |
215 | * if there is no written data, don't waste time to write recovery info. | |
216 | */ | |
217 | if (!is_inode_flag_set(fi, FI_APPEND_WRITE) && | |
2403c155 | 218 | !exist_written_data(sbi, ino, APPEND_INO)) { |
19c9c466 | 219 | |
9c7bb702 CL |
220 | /* it may call write_inode just prior to fsync */ |
221 | if (need_inode_page_update(sbi, ino)) | |
19c9c466 | 222 | goto go_write; |
19c9c466 | 223 | |
6d99ba41 | 224 | if (is_inode_flag_set(fi, FI_UPDATE_WRITE) || |
2403c155 | 225 | exist_written_data(sbi, ino, UPDATE_INO)) |
6d99ba41 JK |
226 | goto flush_out; |
227 | goto out; | |
228 | } | |
19c9c466 | 229 | go_write: |
7d82db83 JK |
230 | /* guarantee free sections for fsync */ |
231 | f2fs_balance_fs(sbi); | |
232 | ||
e5d2385e JK |
233 | /* |
234 | * Both of fdatasync() and fsync() are able to be recovered from | |
235 | * sudden-power-off. | |
236 | */ | |
9d1589ef CY |
237 | down_read(&fi->i_sem); |
238 | need_cp = need_do_checkpoint(inode); | |
d928bfbf JK |
239 | up_read(&fi->i_sem); |
240 | ||
fbfa2cc5 JK |
241 | if (need_cp) { |
242 | /* all the dirty node pages should be flushed for POR */ | |
243 | ret = f2fs_sync_fs(inode->i_sb, 1); | |
d928bfbf | 244 | |
51455b19 CL |
245 | /* |
246 | * We've secured consistency through sync_fs. Following pino | |
247 | * will be used only for fsynced inodes after checkpoint. | |
248 | */ | |
249 | try_to_fix_pino(inode); | |
cff28521 JK |
250 | clear_inode_flag(fi, FI_APPEND_WRITE); |
251 | clear_inode_flag(fi, FI_UPDATE_WRITE); | |
51455b19 CL |
252 | goto out; |
253 | } | |
88bd02c9 | 254 | sync_nodes: |
51455b19 CL |
255 | sync_node_pages(sbi, ino, &wbc); |
256 | ||
871f599f JK |
257 | /* if cp_error was enabled, we should avoid infinite loop */ |
258 | if (unlikely(f2fs_cp_error(sbi))) | |
259 | goto out; | |
260 | ||
51455b19 CL |
261 | if (need_inode_block_update(sbi, ino)) { |
262 | mark_inode_dirty_sync(inode); | |
263 | f2fs_write_inode(inode, NULL); | |
264 | goto sync_nodes; | |
fbfa2cc5 | 265 | } |
51455b19 CL |
266 | |
267 | ret = wait_on_node_pages_writeback(sbi, ino); | |
268 | if (ret) | |
269 | goto out; | |
270 | ||
271 | /* once recovery info is written, don't need to tack this */ | |
272 | remove_dirty_inode(sbi, ino, APPEND_INO); | |
273 | clear_inode_flag(fi, FI_APPEND_WRITE); | |
274 | flush_out: | |
275 | remove_dirty_inode(sbi, ino, UPDATE_INO); | |
276 | clear_inode_flag(fi, FI_UPDATE_WRITE); | |
277 | ret = f2fs_issue_flush(sbi); | |
fbfa2cc5 | 278 | out: |
a2a4a7e4 | 279 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); |
05ca3632 | 280 | f2fs_trace_ios(NULL, 1); |
fbfa2cc5 JK |
281 | return ret; |
282 | } | |
283 | ||
7f7670fe JK |
284 | static pgoff_t __get_first_dirty_index(struct address_space *mapping, |
285 | pgoff_t pgofs, int whence) | |
286 | { | |
287 | struct pagevec pvec; | |
288 | int nr_pages; | |
289 | ||
290 | if (whence != SEEK_DATA) | |
291 | return 0; | |
292 | ||
293 | /* find first dirty page index */ | |
294 | pagevec_init(&pvec, 0); | |
65b85ccc JK |
295 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs, |
296 | PAGECACHE_TAG_DIRTY, 1); | |
297 | pgofs = nr_pages ? pvec.pages[0]->index : LONG_MAX; | |
7f7670fe JK |
298 | pagevec_release(&pvec); |
299 | return pgofs; | |
300 | } | |
301 | ||
302 | static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs, | |
303 | int whence) | |
304 | { | |
305 | switch (whence) { | |
306 | case SEEK_DATA: | |
307 | if ((blkaddr == NEW_ADDR && dirty == pgofs) || | |
308 | (blkaddr != NEW_ADDR && blkaddr != NULL_ADDR)) | |
309 | return true; | |
310 | break; | |
311 | case SEEK_HOLE: | |
312 | if (blkaddr == NULL_ADDR) | |
313 | return true; | |
314 | break; | |
315 | } | |
316 | return false; | |
317 | } | |
318 | ||
267378d4 CY |
319 | static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence) |
320 | { | |
321 | struct inode *inode = file->f_mapping->host; | |
322 | loff_t maxbytes = inode->i_sb->s_maxbytes; | |
323 | struct dnode_of_data dn; | |
7f7670fe JK |
324 | pgoff_t pgofs, end_offset, dirty; |
325 | loff_t data_ofs = offset; | |
326 | loff_t isize; | |
267378d4 CY |
327 | int err = 0; |
328 | ||
329 | mutex_lock(&inode->i_mutex); | |
330 | ||
331 | isize = i_size_read(inode); | |
332 | if (offset >= isize) | |
333 | goto fail; | |
334 | ||
335 | /* handle inline data case */ | |
622f28ae | 336 | if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) { |
267378d4 CY |
337 | if (whence == SEEK_HOLE) |
338 | data_ofs = isize; | |
339 | goto found; | |
340 | } | |
341 | ||
342 | pgofs = (pgoff_t)(offset >> PAGE_CACHE_SHIFT); | |
343 | ||
7f7670fe JK |
344 | dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence); |
345 | ||
267378d4 CY |
346 | for (; data_ofs < isize; data_ofs = pgofs << PAGE_CACHE_SHIFT) { |
347 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
348 | err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE_RA); | |
349 | if (err && err != -ENOENT) { | |
350 | goto fail; | |
351 | } else if (err == -ENOENT) { | |
e1c42045 | 352 | /* direct node does not exists */ |
267378d4 CY |
353 | if (whence == SEEK_DATA) { |
354 | pgofs = PGOFS_OF_NEXT_DNODE(pgofs, | |
355 | F2FS_I(inode)); | |
356 | continue; | |
357 | } else { | |
358 | goto found; | |
359 | } | |
360 | } | |
361 | ||
6b2920a5 | 362 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
267378d4 CY |
363 | |
364 | /* find data/hole in dnode block */ | |
365 | for (; dn.ofs_in_node < end_offset; | |
366 | dn.ofs_in_node++, pgofs++, | |
2e023174 | 367 | data_ofs = (loff_t)pgofs << PAGE_CACHE_SHIFT) { |
267378d4 CY |
368 | block_t blkaddr; |
369 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
370 | ||
7f7670fe | 371 | if (__found_offset(blkaddr, dirty, pgofs, whence)) { |
267378d4 CY |
372 | f2fs_put_dnode(&dn); |
373 | goto found; | |
374 | } | |
375 | } | |
376 | f2fs_put_dnode(&dn); | |
377 | } | |
378 | ||
379 | if (whence == SEEK_DATA) | |
380 | goto fail; | |
267378d4 | 381 | found: |
fe369bc8 JK |
382 | if (whence == SEEK_HOLE && data_ofs > isize) |
383 | data_ofs = isize; | |
267378d4 CY |
384 | mutex_unlock(&inode->i_mutex); |
385 | return vfs_setpos(file, data_ofs, maxbytes); | |
386 | fail: | |
387 | mutex_unlock(&inode->i_mutex); | |
388 | return -ENXIO; | |
389 | } | |
390 | ||
391 | static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence) | |
392 | { | |
393 | struct inode *inode = file->f_mapping->host; | |
394 | loff_t maxbytes = inode->i_sb->s_maxbytes; | |
395 | ||
396 | switch (whence) { | |
397 | case SEEK_SET: | |
398 | case SEEK_CUR: | |
399 | case SEEK_END: | |
400 | return generic_file_llseek_size(file, offset, whence, | |
401 | maxbytes, i_size_read(inode)); | |
402 | case SEEK_DATA: | |
403 | case SEEK_HOLE: | |
0b4c5afd JK |
404 | if (offset < 0) |
405 | return -ENXIO; | |
267378d4 CY |
406 | return f2fs_seek_block(file, offset, whence); |
407 | } | |
408 | ||
409 | return -EINVAL; | |
410 | } | |
411 | ||
fbfa2cc5 JK |
412 | static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma) |
413 | { | |
b3d208f9 JK |
414 | struct inode *inode = file_inode(file); |
415 | ||
fcc85a4d JK |
416 | if (f2fs_encrypted_inode(inode)) { |
417 | int err = f2fs_get_encryption_info(inode); | |
418 | if (err) | |
419 | return 0; | |
420 | } | |
421 | ||
b3d208f9 JK |
422 | /* we don't need to use inline_data strictly */ |
423 | if (f2fs_has_inline_data(inode)) { | |
424 | int err = f2fs_convert_inline_inode(inode); | |
425 | if (err) | |
426 | return err; | |
427 | } | |
428 | ||
fbfa2cc5 JK |
429 | file_accessed(file); |
430 | vma->vm_ops = &f2fs_file_vm_ops; | |
431 | return 0; | |
432 | } | |
433 | ||
fcc85a4d JK |
434 | static int f2fs_file_open(struct inode *inode, struct file *filp) |
435 | { | |
436 | int ret = generic_file_open(inode, filp); | |
437 | ||
438 | if (!ret && f2fs_encrypted_inode(inode)) { | |
439 | ret = f2fs_get_encryption_info(inode); | |
440 | if (ret) | |
441 | ret = -EACCES; | |
442 | } | |
443 | return ret; | |
444 | } | |
445 | ||
b292dcab | 446 | int truncate_data_blocks_range(struct dnode_of_data *dn, int count) |
fbfa2cc5 JK |
447 | { |
448 | int nr_free = 0, ofs = dn->ofs_in_node; | |
4081363f | 449 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
fbfa2cc5 JK |
450 | struct f2fs_node *raw_node; |
451 | __le32 *addr; | |
452 | ||
45590710 | 453 | raw_node = F2FS_NODE(dn->node_page); |
fbfa2cc5 JK |
454 | addr = blkaddr_in_node(raw_node) + ofs; |
455 | ||
6c311ec6 | 456 | for (; count > 0; count--, addr++, dn->ofs_in_node++) { |
fbfa2cc5 JK |
457 | block_t blkaddr = le32_to_cpu(*addr); |
458 | if (blkaddr == NULL_ADDR) | |
459 | continue; | |
460 | ||
e1509cf2 | 461 | dn->data_blkaddr = NULL_ADDR; |
216a620a | 462 | set_data_blkaddr(dn); |
7e4dde79 | 463 | f2fs_update_extent_cache(dn); |
fbfa2cc5 | 464 | invalidate_blocks(sbi, blkaddr); |
3c6c2beb JK |
465 | if (dn->ofs_in_node == 0 && IS_INODE(dn->node_page)) |
466 | clear_inode_flag(F2FS_I(dn->inode), | |
467 | FI_FIRST_BLOCK_WRITTEN); | |
fbfa2cc5 JK |
468 | nr_free++; |
469 | } | |
470 | if (nr_free) { | |
d7cc950b | 471 | dec_valid_block_count(sbi, dn->inode, nr_free); |
fbfa2cc5 JK |
472 | set_page_dirty(dn->node_page); |
473 | sync_inode_page(dn); | |
474 | } | |
475 | dn->ofs_in_node = ofs; | |
51dd6249 NJ |
476 | |
477 | trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid, | |
478 | dn->ofs_in_node, nr_free); | |
fbfa2cc5 JK |
479 | return nr_free; |
480 | } | |
481 | ||
482 | void truncate_data_blocks(struct dnode_of_data *dn) | |
483 | { | |
484 | truncate_data_blocks_range(dn, ADDRS_PER_BLOCK); | |
485 | } | |
486 | ||
0bfcfcca | 487 | static int truncate_partial_data_page(struct inode *inode, u64 from, |
43f3eae1 | 488 | bool cache_only) |
fbfa2cc5 JK |
489 | { |
490 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
43f3eae1 JK |
491 | pgoff_t index = from >> PAGE_CACHE_SHIFT; |
492 | struct address_space *mapping = inode->i_mapping; | |
fbfa2cc5 JK |
493 | struct page *page; |
494 | ||
43f3eae1 | 495 | if (!offset && !cache_only) |
b3d208f9 | 496 | return 0; |
fbfa2cc5 | 497 | |
43f3eae1 JK |
498 | if (cache_only) { |
499 | page = grab_cache_page(mapping, index); | |
500 | if (page && PageUptodate(page)) | |
501 | goto truncate_out; | |
502 | f2fs_put_page(page, 1); | |
b3d208f9 | 503 | return 0; |
43f3eae1 | 504 | } |
fbfa2cc5 | 505 | |
43f3eae1 JK |
506 | page = get_lock_data_page(inode, index); |
507 | if (IS_ERR(page)) | |
508 | return 0; | |
509 | truncate_out: | |
3cb5ad15 | 510 | f2fs_wait_on_page_writeback(page, DATA); |
fbfa2cc5 | 511 | zero_user(page, offset, PAGE_CACHE_SIZE - offset); |
4375a336 | 512 | if (!cache_only || !f2fs_encrypted_inode(inode) || !S_ISREG(inode->i_mode)) |
0bfcfcca | 513 | set_page_dirty(page); |
fbfa2cc5 | 514 | f2fs_put_page(page, 1); |
b3d208f9 | 515 | return 0; |
fbfa2cc5 JK |
516 | } |
517 | ||
764aa3e9 | 518 | int truncate_blocks(struct inode *inode, u64 from, bool lock) |
fbfa2cc5 | 519 | { |
4081363f | 520 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 JK |
521 | unsigned int blocksize = inode->i_sb->s_blocksize; |
522 | struct dnode_of_data dn; | |
523 | pgoff_t free_from; | |
9ffe0fb5 | 524 | int count = 0, err = 0; |
b3d208f9 | 525 | struct page *ipage; |
0bfcfcca | 526 | bool truncate_page = false; |
fbfa2cc5 | 527 | |
51dd6249 NJ |
528 | trace_f2fs_truncate_blocks_enter(inode, from); |
529 | ||
f7ef9b83 | 530 | free_from = (pgoff_t)F2FS_BYTES_TO_BLK(from + blocksize - 1); |
fbfa2cc5 | 531 | |
764aa3e9 JK |
532 | if (lock) |
533 | f2fs_lock_op(sbi); | |
9ffe0fb5 | 534 | |
b3d208f9 JK |
535 | ipage = get_node_page(sbi, inode->i_ino); |
536 | if (IS_ERR(ipage)) { | |
537 | err = PTR_ERR(ipage); | |
538 | goto out; | |
539 | } | |
540 | ||
541 | if (f2fs_has_inline_data(inode)) { | |
0bfcfcca CY |
542 | if (truncate_inline_inode(ipage, from)) |
543 | set_page_dirty(ipage); | |
b3d208f9 | 544 | f2fs_put_page(ipage, 1); |
0bfcfcca | 545 | truncate_page = true; |
b3d208f9 JK |
546 | goto out; |
547 | } | |
548 | ||
549 | set_new_dnode(&dn, inode, ipage, NULL, 0); | |
266e97a8 | 550 | err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE); |
fbfa2cc5 JK |
551 | if (err) { |
552 | if (err == -ENOENT) | |
553 | goto free_next; | |
b3d208f9 | 554 | goto out; |
1ce86bf6 JK |
555 | } |
556 | ||
6403eb1f | 557 | count = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
fbfa2cc5 JK |
558 | |
559 | count -= dn.ofs_in_node; | |
9850cf4a | 560 | f2fs_bug_on(sbi, count < 0); |
39936837 | 561 | |
fbfa2cc5 JK |
562 | if (dn.ofs_in_node || IS_INODE(dn.node_page)) { |
563 | truncate_data_blocks_range(&dn, count); | |
564 | free_from += count; | |
565 | } | |
566 | ||
567 | f2fs_put_dnode(&dn); | |
568 | free_next: | |
569 | err = truncate_inode_blocks(inode, free_from); | |
764d2c80 JK |
570 | out: |
571 | if (lock) | |
572 | f2fs_unlock_op(sbi); | |
b3d208f9 JK |
573 | |
574 | /* lastly zero out the first data page */ | |
575 | if (!err) | |
0bfcfcca | 576 | err = truncate_partial_data_page(inode, from, truncate_page); |
fbfa2cc5 | 577 | |
51dd6249 | 578 | trace_f2fs_truncate_blocks_exit(inode, err); |
fbfa2cc5 JK |
579 | return err; |
580 | } | |
581 | ||
b0154891 | 582 | int f2fs_truncate(struct inode *inode, bool lock) |
fbfa2cc5 | 583 | { |
b0154891 CY |
584 | int err; |
585 | ||
fbfa2cc5 JK |
586 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || |
587 | S_ISLNK(inode->i_mode))) | |
b0154891 | 588 | return 0; |
fbfa2cc5 | 589 | |
51dd6249 NJ |
590 | trace_f2fs_truncate(inode); |
591 | ||
92dffd01 | 592 | /* we should check inline_data size */ |
01b960e9 | 593 | if (f2fs_has_inline_data(inode) && !f2fs_may_inline_data(inode)) { |
b0154891 CY |
594 | err = f2fs_convert_inline_inode(inode); |
595 | if (err) | |
596 | return err; | |
92dffd01 JK |
597 | } |
598 | ||
b0154891 CY |
599 | err = truncate_blocks(inode, i_size_read(inode), lock); |
600 | if (err) | |
601 | return err; | |
602 | ||
603 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
604 | mark_inode_dirty(inode); | |
605 | return 0; | |
fbfa2cc5 JK |
606 | } |
607 | ||
2d4d9fb5 | 608 | int f2fs_getattr(struct vfsmount *mnt, |
fbfa2cc5 JK |
609 | struct dentry *dentry, struct kstat *stat) |
610 | { | |
2b0143b5 | 611 | struct inode *inode = d_inode(dentry); |
fbfa2cc5 JK |
612 | generic_fillattr(inode, stat); |
613 | stat->blocks <<= 3; | |
614 | return 0; | |
615 | } | |
616 | ||
617 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
618 | static void __setattr_copy(struct inode *inode, const struct iattr *attr) | |
619 | { | |
620 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
621 | unsigned int ia_valid = attr->ia_valid; | |
622 | ||
623 | if (ia_valid & ATTR_UID) | |
624 | inode->i_uid = attr->ia_uid; | |
625 | if (ia_valid & ATTR_GID) | |
626 | inode->i_gid = attr->ia_gid; | |
627 | if (ia_valid & ATTR_ATIME) | |
628 | inode->i_atime = timespec_trunc(attr->ia_atime, | |
629 | inode->i_sb->s_time_gran); | |
630 | if (ia_valid & ATTR_MTIME) | |
631 | inode->i_mtime = timespec_trunc(attr->ia_mtime, | |
632 | inode->i_sb->s_time_gran); | |
633 | if (ia_valid & ATTR_CTIME) | |
634 | inode->i_ctime = timespec_trunc(attr->ia_ctime, | |
635 | inode->i_sb->s_time_gran); | |
636 | if (ia_valid & ATTR_MODE) { | |
637 | umode_t mode = attr->ia_mode; | |
638 | ||
639 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
640 | mode &= ~S_ISGID; | |
641 | set_acl_inode(fi, mode); | |
642 | } | |
643 | } | |
644 | #else | |
645 | #define __setattr_copy setattr_copy | |
646 | #endif | |
647 | ||
648 | int f2fs_setattr(struct dentry *dentry, struct iattr *attr) | |
649 | { | |
2b0143b5 | 650 | struct inode *inode = d_inode(dentry); |
fbfa2cc5 JK |
651 | struct f2fs_inode_info *fi = F2FS_I(inode); |
652 | int err; | |
653 | ||
654 | err = inode_change_ok(inode, attr); | |
655 | if (err) | |
656 | return err; | |
657 | ||
09db6a2e | 658 | if (attr->ia_valid & ATTR_SIZE) { |
fcc85a4d JK |
659 | if (f2fs_encrypted_inode(inode) && |
660 | f2fs_get_encryption_info(inode)) | |
661 | return -EACCES; | |
662 | ||
3c454145 | 663 | if (attr->ia_size <= i_size_read(inode)) { |
09db6a2e | 664 | truncate_setsize(inode, attr->ia_size); |
b0154891 CY |
665 | err = f2fs_truncate(inode, true); |
666 | if (err) | |
667 | return err; | |
09db6a2e CY |
668 | f2fs_balance_fs(F2FS_I_SB(inode)); |
669 | } else { | |
670 | /* | |
3c454145 CY |
671 | * do not trim all blocks after i_size if target size is |
672 | * larger than i_size. | |
09db6a2e | 673 | */ |
3c454145 | 674 | truncate_setsize(inode, attr->ia_size); |
09db6a2e | 675 | } |
fbfa2cc5 JK |
676 | } |
677 | ||
678 | __setattr_copy(inode, attr); | |
679 | ||
680 | if (attr->ia_valid & ATTR_MODE) { | |
a6dda0e6 | 681 | err = posix_acl_chmod(inode, get_inode_mode(inode)); |
fbfa2cc5 JK |
682 | if (err || is_inode_flag_set(fi, FI_ACL_MODE)) { |
683 | inode->i_mode = fi->i_acl_mode; | |
684 | clear_inode_flag(fi, FI_ACL_MODE); | |
685 | } | |
686 | } | |
687 | ||
688 | mark_inode_dirty(inode); | |
689 | return err; | |
690 | } | |
691 | ||
692 | const struct inode_operations f2fs_file_inode_operations = { | |
693 | .getattr = f2fs_getattr, | |
694 | .setattr = f2fs_setattr, | |
695 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 696 | .set_acl = f2fs_set_acl, |
fbfa2cc5 JK |
697 | #ifdef CONFIG_F2FS_FS_XATTR |
698 | .setxattr = generic_setxattr, | |
699 | .getxattr = generic_getxattr, | |
700 | .listxattr = f2fs_listxattr, | |
701 | .removexattr = generic_removexattr, | |
702 | #endif | |
9ab70134 | 703 | .fiemap = f2fs_fiemap, |
fbfa2cc5 JK |
704 | }; |
705 | ||
6394328a | 706 | static int fill_zero(struct inode *inode, pgoff_t index, |
fbfa2cc5 JK |
707 | loff_t start, loff_t len) |
708 | { | |
4081363f | 709 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 JK |
710 | struct page *page; |
711 | ||
712 | if (!len) | |
6394328a | 713 | return 0; |
fbfa2cc5 | 714 | |
bd43df02 JK |
715 | f2fs_balance_fs(sbi); |
716 | ||
e479556b | 717 | f2fs_lock_op(sbi); |
64aa7ed9 | 718 | page = get_new_data_page(inode, NULL, index, false); |
e479556b | 719 | f2fs_unlock_op(sbi); |
fbfa2cc5 | 720 | |
6394328a CY |
721 | if (IS_ERR(page)) |
722 | return PTR_ERR(page); | |
723 | ||
724 | f2fs_wait_on_page_writeback(page, DATA); | |
725 | zero_user(page, start, len); | |
726 | set_page_dirty(page); | |
727 | f2fs_put_page(page, 1); | |
728 | return 0; | |
fbfa2cc5 JK |
729 | } |
730 | ||
731 | int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) | |
732 | { | |
733 | pgoff_t index; | |
734 | int err; | |
735 | ||
736 | for (index = pg_start; index < pg_end; index++) { | |
737 | struct dnode_of_data dn; | |
9eaeba70 | 738 | |
fbfa2cc5 | 739 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 740 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
fbfa2cc5 | 741 | if (err) { |
fbfa2cc5 JK |
742 | if (err == -ENOENT) |
743 | continue; | |
744 | return err; | |
745 | } | |
746 | ||
747 | if (dn.data_blkaddr != NULL_ADDR) | |
748 | truncate_data_blocks_range(&dn, 1); | |
749 | f2fs_put_dnode(&dn); | |
fbfa2cc5 JK |
750 | } |
751 | return 0; | |
752 | } | |
753 | ||
a66c7b2f | 754 | static int punch_hole(struct inode *inode, loff_t offset, loff_t len) |
fbfa2cc5 JK |
755 | { |
756 | pgoff_t pg_start, pg_end; | |
757 | loff_t off_start, off_end; | |
758 | int ret = 0; | |
759 | ||
14cecc5c CY |
760 | if (!S_ISREG(inode->i_mode)) |
761 | return -EOPNOTSUPP; | |
762 | ||
b3d208f9 JK |
763 | if (f2fs_has_inline_data(inode)) { |
764 | ret = f2fs_convert_inline_inode(inode); | |
765 | if (ret) | |
766 | return ret; | |
767 | } | |
9ffe0fb5 | 768 | |
fbfa2cc5 JK |
769 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; |
770 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
771 | ||
772 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
773 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
774 | ||
775 | if (pg_start == pg_end) { | |
6394328a | 776 | ret = fill_zero(inode, pg_start, off_start, |
fbfa2cc5 | 777 | off_end - off_start); |
6394328a CY |
778 | if (ret) |
779 | return ret; | |
fbfa2cc5 | 780 | } else { |
6394328a CY |
781 | if (off_start) { |
782 | ret = fill_zero(inode, pg_start++, off_start, | |
783 | PAGE_CACHE_SIZE - off_start); | |
784 | if (ret) | |
785 | return ret; | |
786 | } | |
787 | if (off_end) { | |
788 | ret = fill_zero(inode, pg_end, 0, off_end); | |
789 | if (ret) | |
790 | return ret; | |
791 | } | |
fbfa2cc5 JK |
792 | |
793 | if (pg_start < pg_end) { | |
794 | struct address_space *mapping = inode->i_mapping; | |
795 | loff_t blk_start, blk_end; | |
4081363f | 796 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
1127a3d4 JH |
797 | |
798 | f2fs_balance_fs(sbi); | |
fbfa2cc5 JK |
799 | |
800 | blk_start = pg_start << PAGE_CACHE_SHIFT; | |
801 | blk_end = pg_end << PAGE_CACHE_SHIFT; | |
802 | truncate_inode_pages_range(mapping, blk_start, | |
803 | blk_end - 1); | |
39936837 | 804 | |
e479556b | 805 | f2fs_lock_op(sbi); |
fbfa2cc5 | 806 | ret = truncate_hole(inode, pg_start, pg_end); |
e479556b | 807 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
808 | } |
809 | } | |
810 | ||
fbfa2cc5 JK |
811 | return ret; |
812 | } | |
813 | ||
b4ace337 CY |
814 | static int f2fs_do_collapse(struct inode *inode, pgoff_t start, pgoff_t end) |
815 | { | |
816 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
817 | struct dnode_of_data dn; | |
818 | pgoff_t nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE; | |
819 | int ret = 0; | |
820 | ||
b4ace337 CY |
821 | for (; end < nrpages; start++, end++) { |
822 | block_t new_addr, old_addr; | |
823 | ||
ecbaa406 CY |
824 | f2fs_lock_op(sbi); |
825 | ||
b4ace337 CY |
826 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
827 | ret = get_dnode_of_data(&dn, end, LOOKUP_NODE_RA); | |
828 | if (ret && ret != -ENOENT) { | |
829 | goto out; | |
830 | } else if (ret == -ENOENT) { | |
831 | new_addr = NULL_ADDR; | |
832 | } else { | |
833 | new_addr = dn.data_blkaddr; | |
834 | truncate_data_blocks_range(&dn, 1); | |
835 | f2fs_put_dnode(&dn); | |
836 | } | |
837 | ||
838 | if (new_addr == NULL_ADDR) { | |
839 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
840 | ret = get_dnode_of_data(&dn, start, LOOKUP_NODE_RA); | |
ecbaa406 | 841 | if (ret && ret != -ENOENT) { |
b4ace337 | 842 | goto out; |
ecbaa406 CY |
843 | } else if (ret == -ENOENT) { |
844 | f2fs_unlock_op(sbi); | |
b4ace337 | 845 | continue; |
ecbaa406 | 846 | } |
b4ace337 CY |
847 | |
848 | if (dn.data_blkaddr == NULL_ADDR) { | |
849 | f2fs_put_dnode(&dn); | |
ecbaa406 | 850 | f2fs_unlock_op(sbi); |
b4ace337 CY |
851 | continue; |
852 | } else { | |
853 | truncate_data_blocks_range(&dn, 1); | |
854 | } | |
855 | ||
856 | f2fs_put_dnode(&dn); | |
857 | } else { | |
858 | struct page *ipage; | |
859 | ||
860 | ipage = get_node_page(sbi, inode->i_ino); | |
861 | if (IS_ERR(ipage)) { | |
862 | ret = PTR_ERR(ipage); | |
863 | goto out; | |
864 | } | |
865 | ||
866 | set_new_dnode(&dn, inode, ipage, NULL, 0); | |
867 | ret = f2fs_reserve_block(&dn, start); | |
868 | if (ret) | |
869 | goto out; | |
870 | ||
871 | old_addr = dn.data_blkaddr; | |
872 | if (old_addr != NEW_ADDR && new_addr == NEW_ADDR) { | |
873 | dn.data_blkaddr = NULL_ADDR; | |
874 | f2fs_update_extent_cache(&dn); | |
875 | invalidate_blocks(sbi, old_addr); | |
876 | ||
877 | dn.data_blkaddr = new_addr; | |
878 | set_data_blkaddr(&dn); | |
879 | } else if (new_addr != NEW_ADDR) { | |
880 | struct node_info ni; | |
b4ace337 CY |
881 | |
882 | get_node_info(sbi, dn.nid, &ni); | |
528e3459 CY |
883 | f2fs_replace_block(sbi, &dn, old_addr, new_addr, |
884 | ni.version, true); | |
b4ace337 CY |
885 | } |
886 | ||
887 | f2fs_put_dnode(&dn); | |
888 | } | |
ecbaa406 | 889 | f2fs_unlock_op(sbi); |
b4ace337 | 890 | } |
ecbaa406 | 891 | return 0; |
b4ace337 CY |
892 | out: |
893 | f2fs_unlock_op(sbi); | |
894 | return ret; | |
895 | } | |
896 | ||
897 | static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len) | |
898 | { | |
899 | pgoff_t pg_start, pg_end; | |
900 | loff_t new_size; | |
901 | int ret; | |
902 | ||
903 | if (!S_ISREG(inode->i_mode)) | |
904 | return -EINVAL; | |
905 | ||
906 | if (offset + len >= i_size_read(inode)) | |
907 | return -EINVAL; | |
908 | ||
909 | /* collapse range should be aligned to block size of f2fs. */ | |
910 | if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1)) | |
911 | return -EINVAL; | |
912 | ||
97a7b2c2 JK |
913 | f2fs_balance_fs(F2FS_I_SB(inode)); |
914 | ||
915 | if (f2fs_has_inline_data(inode)) { | |
916 | ret = f2fs_convert_inline_inode(inode); | |
917 | if (ret) | |
918 | return ret; | |
919 | } | |
920 | ||
b4ace337 CY |
921 | pg_start = offset >> PAGE_CACHE_SHIFT; |
922 | pg_end = (offset + len) >> PAGE_CACHE_SHIFT; | |
923 | ||
924 | /* write out all dirty pages from offset */ | |
925 | ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); | |
926 | if (ret) | |
927 | return ret; | |
928 | ||
929 | truncate_pagecache(inode, offset); | |
930 | ||
931 | ret = f2fs_do_collapse(inode, pg_start, pg_end); | |
932 | if (ret) | |
933 | return ret; | |
934 | ||
935 | new_size = i_size_read(inode) - len; | |
936 | ||
937 | ret = truncate_blocks(inode, new_size, true); | |
938 | if (!ret) | |
939 | i_size_write(inode, new_size); | |
940 | ||
941 | return ret; | |
942 | } | |
943 | ||
75cd4e09 CY |
944 | static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len, |
945 | int mode) | |
946 | { | |
947 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
948 | struct address_space *mapping = inode->i_mapping; | |
949 | pgoff_t index, pg_start, pg_end; | |
950 | loff_t new_size = i_size_read(inode); | |
951 | loff_t off_start, off_end; | |
952 | int ret = 0; | |
953 | ||
954 | if (!S_ISREG(inode->i_mode)) | |
955 | return -EINVAL; | |
956 | ||
957 | ret = inode_newsize_ok(inode, (len + offset)); | |
958 | if (ret) | |
959 | return ret; | |
960 | ||
961 | f2fs_balance_fs(sbi); | |
962 | ||
963 | if (f2fs_has_inline_data(inode)) { | |
964 | ret = f2fs_convert_inline_inode(inode); | |
965 | if (ret) | |
966 | return ret; | |
967 | } | |
968 | ||
969 | ret = filemap_write_and_wait_range(mapping, offset, offset + len - 1); | |
970 | if (ret) | |
971 | return ret; | |
972 | ||
973 | truncate_pagecache_range(inode, offset, offset + len - 1); | |
974 | ||
975 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; | |
976 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
977 | ||
978 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
979 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
980 | ||
981 | if (pg_start == pg_end) { | |
6394328a CY |
982 | ret = fill_zero(inode, pg_start, off_start, |
983 | off_end - off_start); | |
984 | if (ret) | |
985 | return ret; | |
986 | ||
75cd4e09 CY |
987 | if (offset + len > new_size) |
988 | new_size = offset + len; | |
989 | new_size = max_t(loff_t, new_size, offset + len); | |
990 | } else { | |
991 | if (off_start) { | |
6394328a CY |
992 | ret = fill_zero(inode, pg_start++, off_start, |
993 | PAGE_CACHE_SIZE - off_start); | |
994 | if (ret) | |
995 | return ret; | |
996 | ||
75cd4e09 CY |
997 | new_size = max_t(loff_t, new_size, |
998 | pg_start << PAGE_CACHE_SHIFT); | |
999 | } | |
1000 | ||
1001 | for (index = pg_start; index < pg_end; index++) { | |
1002 | struct dnode_of_data dn; | |
1003 | struct page *ipage; | |
1004 | ||
1005 | f2fs_lock_op(sbi); | |
1006 | ||
1007 | ipage = get_node_page(sbi, inode->i_ino); | |
1008 | if (IS_ERR(ipage)) { | |
1009 | ret = PTR_ERR(ipage); | |
1010 | f2fs_unlock_op(sbi); | |
1011 | goto out; | |
1012 | } | |
1013 | ||
1014 | set_new_dnode(&dn, inode, ipage, NULL, 0); | |
1015 | ret = f2fs_reserve_block(&dn, index); | |
1016 | if (ret) { | |
1017 | f2fs_unlock_op(sbi); | |
1018 | goto out; | |
1019 | } | |
1020 | ||
1021 | if (dn.data_blkaddr != NEW_ADDR) { | |
1022 | invalidate_blocks(sbi, dn.data_blkaddr); | |
1023 | ||
1024 | dn.data_blkaddr = NEW_ADDR; | |
1025 | set_data_blkaddr(&dn); | |
1026 | ||
1027 | dn.data_blkaddr = NULL_ADDR; | |
1028 | f2fs_update_extent_cache(&dn); | |
1029 | } | |
1030 | f2fs_put_dnode(&dn); | |
1031 | f2fs_unlock_op(sbi); | |
1032 | ||
1033 | new_size = max_t(loff_t, new_size, | |
1034 | (index + 1) << PAGE_CACHE_SHIFT); | |
1035 | } | |
1036 | ||
1037 | if (off_end) { | |
6394328a CY |
1038 | ret = fill_zero(inode, pg_end, 0, off_end); |
1039 | if (ret) | |
1040 | goto out; | |
1041 | ||
75cd4e09 CY |
1042 | new_size = max_t(loff_t, new_size, offset + len); |
1043 | } | |
1044 | } | |
1045 | ||
1046 | out: | |
1047 | if (!(mode & FALLOC_FL_KEEP_SIZE) && i_size_read(inode) < new_size) { | |
1048 | i_size_write(inode, new_size); | |
1049 | mark_inode_dirty(inode); | |
1050 | update_inode_page(inode); | |
1051 | } | |
1052 | ||
1053 | return ret; | |
1054 | } | |
1055 | ||
f62185d0 CY |
1056 | static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len) |
1057 | { | |
1058 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1059 | pgoff_t pg_start, pg_end, delta, nrpages, idx; | |
1060 | loff_t new_size; | |
1061 | int ret; | |
1062 | ||
1063 | if (!S_ISREG(inode->i_mode)) | |
1064 | return -EINVAL; | |
1065 | ||
1066 | new_size = i_size_read(inode) + len; | |
1067 | if (new_size > inode->i_sb->s_maxbytes) | |
1068 | return -EFBIG; | |
1069 | ||
1070 | if (offset >= i_size_read(inode)) | |
1071 | return -EINVAL; | |
1072 | ||
1073 | /* insert range should be aligned to block size of f2fs. */ | |
1074 | if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1)) | |
1075 | return -EINVAL; | |
1076 | ||
1077 | f2fs_balance_fs(sbi); | |
1078 | ||
97a7b2c2 JK |
1079 | if (f2fs_has_inline_data(inode)) { |
1080 | ret = f2fs_convert_inline_inode(inode); | |
1081 | if (ret) | |
1082 | return ret; | |
1083 | } | |
1084 | ||
f62185d0 CY |
1085 | ret = truncate_blocks(inode, i_size_read(inode), true); |
1086 | if (ret) | |
1087 | return ret; | |
1088 | ||
1089 | /* write out all dirty pages from offset */ | |
1090 | ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); | |
1091 | if (ret) | |
1092 | return ret; | |
1093 | ||
1094 | truncate_pagecache(inode, offset); | |
1095 | ||
1096 | pg_start = offset >> PAGE_CACHE_SHIFT; | |
1097 | pg_end = (offset + len) >> PAGE_CACHE_SHIFT; | |
1098 | delta = pg_end - pg_start; | |
1099 | nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE; | |
1100 | ||
1101 | for (idx = nrpages - 1; idx >= pg_start && idx != -1; idx--) { | |
1102 | struct dnode_of_data dn; | |
1103 | struct page *ipage; | |
1104 | block_t new_addr, old_addr; | |
1105 | ||
1106 | f2fs_lock_op(sbi); | |
1107 | ||
1108 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
1109 | ret = get_dnode_of_data(&dn, idx, LOOKUP_NODE_RA); | |
1110 | if (ret && ret != -ENOENT) { | |
1111 | goto out; | |
1112 | } else if (ret == -ENOENT) { | |
1113 | goto next; | |
1114 | } else if (dn.data_blkaddr == NULL_ADDR) { | |
1115 | f2fs_put_dnode(&dn); | |
1116 | goto next; | |
1117 | } else { | |
1118 | new_addr = dn.data_blkaddr; | |
1119 | truncate_data_blocks_range(&dn, 1); | |
1120 | f2fs_put_dnode(&dn); | |
1121 | } | |
1122 | ||
1123 | ipage = get_node_page(sbi, inode->i_ino); | |
1124 | if (IS_ERR(ipage)) { | |
1125 | ret = PTR_ERR(ipage); | |
1126 | goto out; | |
1127 | } | |
1128 | ||
1129 | set_new_dnode(&dn, inode, ipage, NULL, 0); | |
1130 | ret = f2fs_reserve_block(&dn, idx + delta); | |
1131 | if (ret) | |
1132 | goto out; | |
1133 | ||
1134 | old_addr = dn.data_blkaddr; | |
1135 | f2fs_bug_on(sbi, old_addr != NEW_ADDR); | |
1136 | ||
1137 | if (new_addr != NEW_ADDR) { | |
1138 | struct node_info ni; | |
1139 | ||
1140 | get_node_info(sbi, dn.nid, &ni); | |
1141 | f2fs_replace_block(sbi, &dn, old_addr, new_addr, | |
1142 | ni.version, true); | |
1143 | } | |
1144 | f2fs_put_dnode(&dn); | |
1145 | next: | |
1146 | f2fs_unlock_op(sbi); | |
1147 | } | |
1148 | ||
1149 | i_size_write(inode, new_size); | |
1150 | return 0; | |
1151 | out: | |
1152 | f2fs_unlock_op(sbi); | |
1153 | return ret; | |
1154 | } | |
1155 | ||
fbfa2cc5 JK |
1156 | static int expand_inode_data(struct inode *inode, loff_t offset, |
1157 | loff_t len, int mode) | |
1158 | { | |
4081363f | 1159 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 JK |
1160 | pgoff_t index, pg_start, pg_end; |
1161 | loff_t new_size = i_size_read(inode); | |
1162 | loff_t off_start, off_end; | |
1163 | int ret = 0; | |
1164 | ||
497a0930 CY |
1165 | f2fs_balance_fs(sbi); |
1166 | ||
fbfa2cc5 JK |
1167 | ret = inode_newsize_ok(inode, (len + offset)); |
1168 | if (ret) | |
1169 | return ret; | |
1170 | ||
b3d208f9 JK |
1171 | if (f2fs_has_inline_data(inode)) { |
1172 | ret = f2fs_convert_inline_inode(inode); | |
1173 | if (ret) | |
1174 | return ret; | |
1175 | } | |
9e09fc85 | 1176 | |
fbfa2cc5 JK |
1177 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; |
1178 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
1179 | ||
1180 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
1181 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
1182 | ||
ead43275 JK |
1183 | f2fs_lock_op(sbi); |
1184 | ||
fbfa2cc5 JK |
1185 | for (index = pg_start; index <= pg_end; index++) { |
1186 | struct dnode_of_data dn; | |
1187 | ||
98397ff3 JK |
1188 | if (index == pg_end && !off_end) |
1189 | goto noalloc; | |
1190 | ||
fbfa2cc5 | 1191 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
b600965c | 1192 | ret = f2fs_reserve_block(&dn, index); |
b600965c | 1193 | if (ret) |
fbfa2cc5 | 1194 | break; |
98397ff3 | 1195 | noalloc: |
fbfa2cc5 JK |
1196 | if (pg_start == pg_end) |
1197 | new_size = offset + len; | |
1198 | else if (index == pg_start && off_start) | |
1199 | new_size = (index + 1) << PAGE_CACHE_SHIFT; | |
1200 | else if (index == pg_end) | |
1201 | new_size = (index << PAGE_CACHE_SHIFT) + off_end; | |
1202 | else | |
1203 | new_size += PAGE_CACHE_SIZE; | |
1204 | } | |
1205 | ||
1206 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
1207 | i_size_read(inode) < new_size) { | |
1208 | i_size_write(inode, new_size); | |
1209 | mark_inode_dirty(inode); | |
ead43275 | 1210 | update_inode_page(inode); |
fbfa2cc5 | 1211 | } |
ead43275 | 1212 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
1213 | |
1214 | return ret; | |
1215 | } | |
1216 | ||
1217 | static long f2fs_fallocate(struct file *file, int mode, | |
1218 | loff_t offset, loff_t len) | |
1219 | { | |
6131ffaa | 1220 | struct inode *inode = file_inode(file); |
587c0a42 | 1221 | long ret = 0; |
fbfa2cc5 | 1222 | |
f62185d0 CY |
1223 | if (f2fs_encrypted_inode(inode) && |
1224 | (mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE))) | |
fcc85a4d JK |
1225 | return -EOPNOTSUPP; |
1226 | ||
b4ace337 | 1227 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE | |
f62185d0 CY |
1228 | FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE | |
1229 | FALLOC_FL_INSERT_RANGE)) | |
fbfa2cc5 JK |
1230 | return -EOPNOTSUPP; |
1231 | ||
3375f696 CY |
1232 | mutex_lock(&inode->i_mutex); |
1233 | ||
587c0a42 TY |
1234 | if (mode & FALLOC_FL_PUNCH_HOLE) { |
1235 | if (offset >= inode->i_size) | |
1236 | goto out; | |
1237 | ||
a66c7b2f | 1238 | ret = punch_hole(inode, offset, len); |
b4ace337 CY |
1239 | } else if (mode & FALLOC_FL_COLLAPSE_RANGE) { |
1240 | ret = f2fs_collapse_range(inode, offset, len); | |
75cd4e09 CY |
1241 | } else if (mode & FALLOC_FL_ZERO_RANGE) { |
1242 | ret = f2fs_zero_range(inode, offset, len, mode); | |
f62185d0 CY |
1243 | } else if (mode & FALLOC_FL_INSERT_RANGE) { |
1244 | ret = f2fs_insert_range(inode, offset, len); | |
b4ace337 | 1245 | } else { |
fbfa2cc5 | 1246 | ret = expand_inode_data(inode, offset, len, mode); |
b4ace337 | 1247 | } |
fbfa2cc5 | 1248 | |
3af60a49 NJ |
1249 | if (!ret) { |
1250 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
1251 | mark_inode_dirty(inode); | |
1252 | } | |
3375f696 | 1253 | |
587c0a42 | 1254 | out: |
3375f696 CY |
1255 | mutex_unlock(&inode->i_mutex); |
1256 | ||
c01e2853 | 1257 | trace_f2fs_fallocate(inode, mode, offset, len, ret); |
fbfa2cc5 JK |
1258 | return ret; |
1259 | } | |
1260 | ||
1e84371f JK |
1261 | static int f2fs_release_file(struct inode *inode, struct file *filp) |
1262 | { | |
1263 | /* some remained atomic pages should discarded */ | |
1264 | if (f2fs_is_atomic_file(inode)) | |
1265 | commit_inmem_pages(inode, true); | |
1266 | if (f2fs_is_volatile_file(inode)) { | |
1267 | set_inode_flag(F2FS_I(inode), FI_DROP_CACHE); | |
1268 | filemap_fdatawrite(inode->i_mapping); | |
1269 | clear_inode_flag(F2FS_I(inode), FI_DROP_CACHE); | |
1270 | } | |
1271 | return 0; | |
1272 | } | |
1273 | ||
fbfa2cc5 JK |
1274 | #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL)) |
1275 | #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL) | |
1276 | ||
1277 | static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags) | |
1278 | { | |
1279 | if (S_ISDIR(mode)) | |
1280 | return flags; | |
1281 | else if (S_ISREG(mode)) | |
1282 | return flags & F2FS_REG_FLMASK; | |
1283 | else | |
1284 | return flags & F2FS_OTHER_FLMASK; | |
1285 | } | |
1286 | ||
52656e6c | 1287 | static int f2fs_ioc_getflags(struct file *filp, unsigned long arg) |
fbfa2cc5 | 1288 | { |
6131ffaa | 1289 | struct inode *inode = file_inode(filp); |
fbfa2cc5 | 1290 | struct f2fs_inode_info *fi = F2FS_I(inode); |
52656e6c JK |
1291 | unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE; |
1292 | return put_user(flags, (int __user *)arg); | |
1293 | } | |
fbfa2cc5 | 1294 | |
52656e6c JK |
1295 | static int f2fs_ioc_setflags(struct file *filp, unsigned long arg) |
1296 | { | |
1297 | struct inode *inode = file_inode(filp); | |
1298 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
1299 | unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE; | |
1300 | unsigned int oldflags; | |
1301 | int ret; | |
fbfa2cc5 | 1302 | |
52656e6c JK |
1303 | ret = mnt_want_write_file(filp); |
1304 | if (ret) | |
1305 | return ret; | |
fbfa2cc5 | 1306 | |
52656e6c JK |
1307 | if (!inode_owner_or_capable(inode)) { |
1308 | ret = -EACCES; | |
1309 | goto out; | |
1310 | } | |
fbfa2cc5 | 1311 | |
52656e6c JK |
1312 | if (get_user(flags, (int __user *)arg)) { |
1313 | ret = -EFAULT; | |
1314 | goto out; | |
1315 | } | |
fbfa2cc5 | 1316 | |
52656e6c | 1317 | flags = f2fs_mask_flags(inode->i_mode, flags); |
fbfa2cc5 | 1318 | |
52656e6c | 1319 | mutex_lock(&inode->i_mutex); |
fbfa2cc5 | 1320 | |
52656e6c | 1321 | oldflags = fi->i_flags; |
fbfa2cc5 | 1322 | |
52656e6c JK |
1323 | if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { |
1324 | if (!capable(CAP_LINUX_IMMUTABLE)) { | |
1325 | mutex_unlock(&inode->i_mutex); | |
1326 | ret = -EPERM; | |
1327 | goto out; | |
fbfa2cc5 | 1328 | } |
52656e6c | 1329 | } |
fbfa2cc5 | 1330 | |
52656e6c JK |
1331 | flags = flags & FS_FL_USER_MODIFIABLE; |
1332 | flags |= oldflags & ~FS_FL_USER_MODIFIABLE; | |
1333 | fi->i_flags = flags; | |
1334 | mutex_unlock(&inode->i_mutex); | |
fbfa2cc5 | 1335 | |
52656e6c JK |
1336 | f2fs_set_inode_flags(inode); |
1337 | inode->i_ctime = CURRENT_TIME; | |
1338 | mark_inode_dirty(inode); | |
fbfa2cc5 | 1339 | out: |
52656e6c JK |
1340 | mnt_drop_write_file(filp); |
1341 | return ret; | |
1342 | } | |
4b2fecc8 | 1343 | |
d49f3e89 CY |
1344 | static int f2fs_ioc_getversion(struct file *filp, unsigned long arg) |
1345 | { | |
1346 | struct inode *inode = file_inode(filp); | |
1347 | ||
1348 | return put_user(inode->i_generation, (int __user *)arg); | |
1349 | } | |
1350 | ||
88b88a66 JK |
1351 | static int f2fs_ioc_start_atomic_write(struct file *filp) |
1352 | { | |
1353 | struct inode *inode = file_inode(filp); | |
f4c9c743 | 1354 | int ret; |
88b88a66 JK |
1355 | |
1356 | if (!inode_owner_or_capable(inode)) | |
1357 | return -EACCES; | |
1358 | ||
1e84371f JK |
1359 | f2fs_balance_fs(F2FS_I_SB(inode)); |
1360 | ||
1361 | if (f2fs_is_atomic_file(inode)) | |
1362 | return 0; | |
88b88a66 | 1363 | |
f4c9c743 CY |
1364 | ret = f2fs_convert_inline_inode(inode); |
1365 | if (ret) | |
1366 | return ret; | |
88b88a66 | 1367 | |
f4c9c743 CY |
1368 | set_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); |
1369 | return 0; | |
88b88a66 JK |
1370 | } |
1371 | ||
1372 | static int f2fs_ioc_commit_atomic_write(struct file *filp) | |
1373 | { | |
1374 | struct inode *inode = file_inode(filp); | |
1375 | int ret; | |
1376 | ||
1377 | if (!inode_owner_or_capable(inode)) | |
1378 | return -EACCES; | |
1379 | ||
02a1335f JK |
1380 | if (f2fs_is_volatile_file(inode)) |
1381 | return 0; | |
1382 | ||
88b88a66 JK |
1383 | ret = mnt_want_write_file(filp); |
1384 | if (ret) | |
1385 | return ret; | |
1386 | ||
6282adbf JK |
1387 | if (f2fs_is_atomic_file(inode)) { |
1388 | clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); | |
edb27dee JK |
1389 | ret = commit_inmem_pages(inode, false); |
1390 | if (ret) | |
1391 | goto err_out; | |
6282adbf | 1392 | } |
88b88a66 | 1393 | |
a5f64b6a | 1394 | ret = f2fs_sync_file(filp, 0, LLONG_MAX, 0); |
edb27dee | 1395 | err_out: |
88b88a66 JK |
1396 | mnt_drop_write_file(filp); |
1397 | return ret; | |
1398 | } | |
1399 | ||
02a1335f JK |
1400 | static int f2fs_ioc_start_volatile_write(struct file *filp) |
1401 | { | |
1402 | struct inode *inode = file_inode(filp); | |
f4c9c743 | 1403 | int ret; |
02a1335f JK |
1404 | |
1405 | if (!inode_owner_or_capable(inode)) | |
1406 | return -EACCES; | |
1407 | ||
1e84371f JK |
1408 | if (f2fs_is_volatile_file(inode)) |
1409 | return 0; | |
1410 | ||
f4c9c743 CY |
1411 | ret = f2fs_convert_inline_inode(inode); |
1412 | if (ret) | |
1413 | return ret; | |
b3d208f9 | 1414 | |
f4c9c743 CY |
1415 | set_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE); |
1416 | return 0; | |
02a1335f JK |
1417 | } |
1418 | ||
1e84371f JK |
1419 | static int f2fs_ioc_release_volatile_write(struct file *filp) |
1420 | { | |
1421 | struct inode *inode = file_inode(filp); | |
1422 | ||
1423 | if (!inode_owner_or_capable(inode)) | |
1424 | return -EACCES; | |
1425 | ||
1426 | if (!f2fs_is_volatile_file(inode)) | |
1427 | return 0; | |
1428 | ||
3c6c2beb JK |
1429 | if (!f2fs_is_first_block_written(inode)) |
1430 | return truncate_partial_data_page(inode, 0, true); | |
1431 | ||
1e84371f JK |
1432 | punch_hole(inode, 0, F2FS_BLKSIZE); |
1433 | return 0; | |
1434 | } | |
1435 | ||
1436 | static int f2fs_ioc_abort_volatile_write(struct file *filp) | |
1437 | { | |
1438 | struct inode *inode = file_inode(filp); | |
1439 | int ret; | |
1440 | ||
1441 | if (!inode_owner_or_capable(inode)) | |
1442 | return -EACCES; | |
1443 | ||
1444 | ret = mnt_want_write_file(filp); | |
1445 | if (ret) | |
1446 | return ret; | |
1447 | ||
1448 | f2fs_balance_fs(F2FS_I_SB(inode)); | |
1449 | ||
1450 | if (f2fs_is_atomic_file(inode)) { | |
1e84371f | 1451 | clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); |
edb27dee | 1452 | commit_inmem_pages(inode, true); |
1e84371f JK |
1453 | } |
1454 | ||
de6a8ec9 | 1455 | if (f2fs_is_volatile_file(inode)) |
1e84371f | 1456 | clear_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE); |
de6a8ec9 | 1457 | |
1e84371f JK |
1458 | mnt_drop_write_file(filp); |
1459 | return ret; | |
1460 | } | |
1461 | ||
1abff93d JK |
1462 | static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg) |
1463 | { | |
1464 | struct inode *inode = file_inode(filp); | |
1465 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1466 | struct super_block *sb = sbi->sb; | |
1467 | __u32 in; | |
1468 | ||
1469 | if (!capable(CAP_SYS_ADMIN)) | |
1470 | return -EPERM; | |
1471 | ||
1472 | if (get_user(in, (__u32 __user *)arg)) | |
1473 | return -EFAULT; | |
1474 | ||
1475 | switch (in) { | |
1476 | case F2FS_GOING_DOWN_FULLSYNC: | |
1477 | sb = freeze_bdev(sb->s_bdev); | |
1478 | if (sb && !IS_ERR(sb)) { | |
1479 | f2fs_stop_checkpoint(sbi); | |
1480 | thaw_bdev(sb->s_bdev, sb); | |
1481 | } | |
1482 | break; | |
1483 | case F2FS_GOING_DOWN_METASYNC: | |
1484 | /* do checkpoint only */ | |
1485 | f2fs_sync_fs(sb, 1); | |
1486 | f2fs_stop_checkpoint(sbi); | |
1487 | break; | |
1488 | case F2FS_GOING_DOWN_NOSYNC: | |
1489 | f2fs_stop_checkpoint(sbi); | |
1490 | break; | |
1491 | default: | |
1492 | return -EINVAL; | |
1493 | } | |
1494 | return 0; | |
1495 | } | |
1496 | ||
52656e6c JK |
1497 | static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg) |
1498 | { | |
1499 | struct inode *inode = file_inode(filp); | |
1500 | struct super_block *sb = inode->i_sb; | |
1501 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
1502 | struct fstrim_range range; | |
1503 | int ret; | |
4b2fecc8 | 1504 | |
52656e6c JK |
1505 | if (!capable(CAP_SYS_ADMIN)) |
1506 | return -EPERM; | |
4b2fecc8 | 1507 | |
52656e6c JK |
1508 | if (!blk_queue_discard(q)) |
1509 | return -EOPNOTSUPP; | |
4b2fecc8 | 1510 | |
52656e6c JK |
1511 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
1512 | sizeof(range))) | |
1513 | return -EFAULT; | |
4b2fecc8 | 1514 | |
52656e6c JK |
1515 | range.minlen = max((unsigned int)range.minlen, |
1516 | q->limits.discard_granularity); | |
1517 | ret = f2fs_trim_fs(F2FS_SB(sb), &range); | |
1518 | if (ret < 0) | |
1519 | return ret; | |
4b2fecc8 | 1520 | |
52656e6c JK |
1521 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
1522 | sizeof(range))) | |
1523 | return -EFAULT; | |
1524 | return 0; | |
1525 | } | |
1526 | ||
f424f664 JK |
1527 | static bool uuid_is_nonzero(__u8 u[16]) |
1528 | { | |
1529 | int i; | |
1530 | ||
1531 | for (i = 0; i < 16; i++) | |
1532 | if (u[i]) | |
1533 | return true; | |
1534 | return false; | |
1535 | } | |
1536 | ||
1537 | static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg) | |
1538 | { | |
1539 | #ifdef CONFIG_F2FS_FS_ENCRYPTION | |
1540 | struct f2fs_encryption_policy policy; | |
1541 | struct inode *inode = file_inode(filp); | |
1542 | ||
1543 | if (copy_from_user(&policy, (struct f2fs_encryption_policy __user *)arg, | |
1544 | sizeof(policy))) | |
1545 | return -EFAULT; | |
1546 | ||
f424f664 JK |
1547 | return f2fs_process_policy(&policy, inode); |
1548 | #else | |
1549 | return -EOPNOTSUPP; | |
1550 | #endif | |
1551 | } | |
1552 | ||
1553 | static int f2fs_ioc_get_encryption_policy(struct file *filp, unsigned long arg) | |
1554 | { | |
1555 | #ifdef CONFIG_F2FS_FS_ENCRYPTION | |
1556 | struct f2fs_encryption_policy policy; | |
1557 | struct inode *inode = file_inode(filp); | |
1558 | int err; | |
1559 | ||
1560 | err = f2fs_get_policy(inode, &policy); | |
1561 | if (err) | |
1562 | return err; | |
1563 | ||
1564 | if (copy_to_user((struct f2fs_encryption_policy __user *)arg, &policy, | |
1565 | sizeof(policy))) | |
1566 | return -EFAULT; | |
1567 | return 0; | |
1568 | #else | |
1569 | return -EOPNOTSUPP; | |
1570 | #endif | |
1571 | } | |
1572 | ||
1573 | static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg) | |
1574 | { | |
1575 | struct inode *inode = file_inode(filp); | |
1576 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1577 | int err; | |
1578 | ||
1579 | if (!f2fs_sb_has_crypto(inode->i_sb)) | |
1580 | return -EOPNOTSUPP; | |
1581 | ||
1582 | if (uuid_is_nonzero(sbi->raw_super->encrypt_pw_salt)) | |
1583 | goto got_it; | |
1584 | ||
1585 | err = mnt_want_write_file(filp); | |
1586 | if (err) | |
1587 | return err; | |
1588 | ||
1589 | /* update superblock with uuid */ | |
1590 | generate_random_uuid(sbi->raw_super->encrypt_pw_salt); | |
1591 | ||
c5bda1c8 | 1592 | err = f2fs_commit_super(sbi, false); |
f424f664 JK |
1593 | |
1594 | mnt_drop_write_file(filp); | |
1595 | if (err) { | |
1596 | /* undo new data */ | |
1597 | memset(sbi->raw_super->encrypt_pw_salt, 0, 16); | |
1598 | return err; | |
1599 | } | |
1600 | got_it: | |
1601 | if (copy_to_user((__u8 __user *)arg, sbi->raw_super->encrypt_pw_salt, | |
1602 | 16)) | |
1603 | return -EFAULT; | |
1604 | return 0; | |
1605 | } | |
1606 | ||
c1c1b583 CY |
1607 | static int f2fs_ioc_gc(struct file *filp, unsigned long arg) |
1608 | { | |
1609 | struct inode *inode = file_inode(filp); | |
1610 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1611 | __u32 i, count; | |
1612 | ||
1613 | if (!capable(CAP_SYS_ADMIN)) | |
1614 | return -EPERM; | |
1615 | ||
1616 | if (get_user(count, (__u32 __user *)arg)) | |
1617 | return -EFAULT; | |
1618 | ||
1619 | if (!count || count > F2FS_BATCH_GC_MAX_NUM) | |
1620 | return -EINVAL; | |
1621 | ||
1622 | for (i = 0; i < count; i++) { | |
1623 | if (!mutex_trylock(&sbi->gc_mutex)) | |
1624 | break; | |
1625 | ||
1626 | if (f2fs_gc(sbi)) | |
1627 | break; | |
1628 | } | |
1629 | ||
1630 | if (put_user(i, (__u32 __user *)arg)) | |
1631 | return -EFAULT; | |
1632 | ||
1633 | return 0; | |
1634 | } | |
1635 | ||
52656e6c JK |
1636 | long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
1637 | { | |
1638 | switch (cmd) { | |
1639 | case F2FS_IOC_GETFLAGS: | |
1640 | return f2fs_ioc_getflags(filp, arg); | |
1641 | case F2FS_IOC_SETFLAGS: | |
1642 | return f2fs_ioc_setflags(filp, arg); | |
d49f3e89 CY |
1643 | case F2FS_IOC_GETVERSION: |
1644 | return f2fs_ioc_getversion(filp, arg); | |
88b88a66 JK |
1645 | case F2FS_IOC_START_ATOMIC_WRITE: |
1646 | return f2fs_ioc_start_atomic_write(filp); | |
1647 | case F2FS_IOC_COMMIT_ATOMIC_WRITE: | |
1648 | return f2fs_ioc_commit_atomic_write(filp); | |
02a1335f JK |
1649 | case F2FS_IOC_START_VOLATILE_WRITE: |
1650 | return f2fs_ioc_start_volatile_write(filp); | |
1e84371f JK |
1651 | case F2FS_IOC_RELEASE_VOLATILE_WRITE: |
1652 | return f2fs_ioc_release_volatile_write(filp); | |
1653 | case F2FS_IOC_ABORT_VOLATILE_WRITE: | |
1654 | return f2fs_ioc_abort_volatile_write(filp); | |
1abff93d JK |
1655 | case F2FS_IOC_SHUTDOWN: |
1656 | return f2fs_ioc_shutdown(filp, arg); | |
52656e6c JK |
1657 | case FITRIM: |
1658 | return f2fs_ioc_fitrim(filp, arg); | |
f424f664 JK |
1659 | case F2FS_IOC_SET_ENCRYPTION_POLICY: |
1660 | return f2fs_ioc_set_encryption_policy(filp, arg); | |
1661 | case F2FS_IOC_GET_ENCRYPTION_POLICY: | |
1662 | return f2fs_ioc_get_encryption_policy(filp, arg); | |
1663 | case F2FS_IOC_GET_ENCRYPTION_PWSALT: | |
1664 | return f2fs_ioc_get_encryption_pwsalt(filp, arg); | |
c1c1b583 CY |
1665 | case F2FS_IOC_GARBAGE_COLLECT: |
1666 | return f2fs_ioc_gc(filp, arg); | |
fbfa2cc5 JK |
1667 | default: |
1668 | return -ENOTTY; | |
1669 | } | |
1670 | } | |
1671 | ||
fcc85a4d JK |
1672 | static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) |
1673 | { | |
1674 | struct inode *inode = file_inode(iocb->ki_filp); | |
1675 | ||
1676 | if (f2fs_encrypted_inode(inode) && | |
1677 | !f2fs_has_encryption_key(inode) && | |
1678 | f2fs_get_encryption_info(inode)) | |
1679 | return -EACCES; | |
1680 | ||
1681 | return generic_file_write_iter(iocb, from); | |
1682 | } | |
1683 | ||
e9750824 NJ |
1684 | #ifdef CONFIG_COMPAT |
1685 | long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
1686 | { | |
1687 | switch (cmd) { | |
1688 | case F2FS_IOC32_GETFLAGS: | |
1689 | cmd = F2FS_IOC_GETFLAGS; | |
1690 | break; | |
1691 | case F2FS_IOC32_SETFLAGS: | |
1692 | cmd = F2FS_IOC_SETFLAGS; | |
1693 | break; | |
1694 | default: | |
1695 | return -ENOIOCTLCMD; | |
1696 | } | |
1697 | return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); | |
1698 | } | |
1699 | #endif | |
1700 | ||
fbfa2cc5 | 1701 | const struct file_operations f2fs_file_operations = { |
267378d4 | 1702 | .llseek = f2fs_llseek, |
aad4f8bb | 1703 | .read_iter = generic_file_read_iter, |
fcc85a4d JK |
1704 | .write_iter = f2fs_file_write_iter, |
1705 | .open = f2fs_file_open, | |
12662234 | 1706 | .release = f2fs_release_file, |
fbfa2cc5 JK |
1707 | .mmap = f2fs_file_mmap, |
1708 | .fsync = f2fs_sync_file, | |
1709 | .fallocate = f2fs_fallocate, | |
1710 | .unlocked_ioctl = f2fs_ioctl, | |
e9750824 NJ |
1711 | #ifdef CONFIG_COMPAT |
1712 | .compat_ioctl = f2fs_compat_ioctl, | |
1713 | #endif | |
fbfa2cc5 | 1714 | .splice_read = generic_file_splice_read, |
8d020765 | 1715 | .splice_write = iter_file_splice_write, |
fbfa2cc5 | 1716 | }; |