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