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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 */ | |
9edcdabf CY |
77 | if (((loff_t)(page->index + 1) << PAGE_CACHE_SHIFT) > |
78 | i_size_read(inode)) { | |
fbfa2cc5 JK |
79 | unsigned offset; |
80 | offset = i_size_read(inode) & ~PAGE_CACHE_MASK; | |
81 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
82 | } | |
83 | set_page_dirty(page); | |
84 | SetPageUptodate(page); | |
85 | ||
e943a10d | 86 | trace_f2fs_vm_page_mkwrite(page, DATA); |
9851e6e1 NJ |
87 | mapped: |
88 | /* fill the page */ | |
3cb5ad15 | 89 | f2fs_wait_on_page_writeback(page, DATA); |
5b339124 CY |
90 | /* if gced page is attached, don't write to cold segment */ |
91 | clear_cold_data(page); | |
fbfa2cc5 JK |
92 | out: |
93 | sb_end_pagefault(inode->i_sb); | |
94 | return block_page_mkwrite_return(err); | |
95 | } | |
96 | ||
97 | static const struct vm_operations_struct f2fs_file_vm_ops = { | |
692bb55d | 98 | .fault = filemap_fault, |
f1820361 | 99 | .map_pages = filemap_map_pages, |
692bb55d | 100 | .page_mkwrite = f2fs_vm_page_mkwrite, |
fbfa2cc5 JK |
101 | }; |
102 | ||
354a3399 JK |
103 | static int get_parent_ino(struct inode *inode, nid_t *pino) |
104 | { | |
105 | struct dentry *dentry; | |
106 | ||
107 | inode = igrab(inode); | |
108 | dentry = d_find_any_alias(inode); | |
109 | iput(inode); | |
110 | if (!dentry) | |
111 | return 0; | |
112 | ||
e7d55452 | 113 | if (update_dent_inode(inode, inode, &dentry->d_name)) { |
f0947e5c JK |
114 | dput(dentry); |
115 | return 0; | |
116 | } | |
354a3399 | 117 | |
f0947e5c JK |
118 | *pino = parent_ino(dentry); |
119 | dput(dentry); | |
354a3399 JK |
120 | return 1; |
121 | } | |
122 | ||
9d1589ef CY |
123 | static inline bool need_do_checkpoint(struct inode *inode) |
124 | { | |
4081363f | 125 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
9d1589ef CY |
126 | bool need_cp = false; |
127 | ||
128 | if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1) | |
129 | need_cp = true; | |
e7d55452 JK |
130 | else if (file_enc_name(inode) && need_dentry_mark(sbi, inode->i_ino)) |
131 | need_cp = true; | |
9d1589ef CY |
132 | else if (file_wrong_pino(inode)) |
133 | need_cp = true; | |
134 | else if (!space_for_roll_forward(sbi)) | |
135 | need_cp = true; | |
136 | else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino)) | |
137 | need_cp = true; | |
138 | else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi))) | |
139 | need_cp = true; | |
d5053a34 JK |
140 | else if (test_opt(sbi, FASTBOOT)) |
141 | need_cp = true; | |
a344b9fd JK |
142 | else if (sbi->active_logs == 2) |
143 | need_cp = true; | |
9d1589ef CY |
144 | |
145 | return need_cp; | |
146 | } | |
147 | ||
9c7bb702 CL |
148 | static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino) |
149 | { | |
150 | struct page *i = find_get_page(NODE_MAPPING(sbi), ino); | |
151 | bool ret = false; | |
152 | /* But we need to avoid that there are some inode updates */ | |
153 | if ((i && PageDirty(i)) || need_inode_block_update(sbi, ino)) | |
154 | ret = true; | |
155 | f2fs_put_page(i, 0); | |
156 | return ret; | |
157 | } | |
158 | ||
51455b19 CL |
159 | static void try_to_fix_pino(struct inode *inode) |
160 | { | |
161 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
162 | nid_t pino; | |
163 | ||
164 | down_write(&fi->i_sem); | |
165 | fi->xattr_ver = 0; | |
166 | if (file_wrong_pino(inode) && inode->i_nlink == 1 && | |
167 | get_parent_ino(inode, &pino)) { | |
168 | fi->i_pino = pino; | |
169 | file_got_pino(inode); | |
170 | up_write(&fi->i_sem); | |
171 | ||
172 | mark_inode_dirty_sync(inode); | |
173 | f2fs_write_inode(inode, NULL); | |
174 | } else { | |
175 | up_write(&fi->i_sem); | |
176 | } | |
177 | } | |
178 | ||
fbfa2cc5 JK |
179 | int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) |
180 | { | |
181 | struct inode *inode = file->f_mapping->host; | |
d928bfbf | 182 | struct f2fs_inode_info *fi = F2FS_I(inode); |
4081363f | 183 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
2403c155 | 184 | nid_t ino = inode->i_ino; |
fbfa2cc5 JK |
185 | int ret = 0; |
186 | bool need_cp = false; | |
187 | struct writeback_control wbc = { | |
c81bf1c8 | 188 | .sync_mode = WB_SYNC_ALL, |
fbfa2cc5 JK |
189 | .nr_to_write = LONG_MAX, |
190 | .for_reclaim = 0, | |
191 | }; | |
192 | ||
6bacf52f | 193 | if (unlikely(f2fs_readonly(inode->i_sb))) |
1fa95b0b NJ |
194 | return 0; |
195 | ||
a2a4a7e4 | 196 | trace_f2fs_sync_file_enter(inode); |
ea1aa12c JK |
197 | |
198 | /* if fdatasync is triggered, let's do in-place-update */ | |
c1ce1b02 | 199 | if (get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks) |
ea1aa12c | 200 | set_inode_flag(fi, FI_NEED_IPU); |
fbfa2cc5 | 201 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
c1ce1b02 JK |
202 | clear_inode_flag(fi, FI_NEED_IPU); |
203 | ||
a2a4a7e4 NJ |
204 | if (ret) { |
205 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); | |
fbfa2cc5 | 206 | return ret; |
a2a4a7e4 | 207 | } |
fbfa2cc5 | 208 | |
9c7bb702 | 209 | /* if the inode is dirty, let's recover all the time */ |
2286c020 JK |
210 | if (!datasync) { |
211 | f2fs_write_inode(inode, NULL); | |
9c7bb702 CL |
212 | goto go_write; |
213 | } | |
214 | ||
6d99ba41 JK |
215 | /* |
216 | * if there is no written data, don't waste time to write recovery info. | |
217 | */ | |
218 | if (!is_inode_flag_set(fi, FI_APPEND_WRITE) && | |
2403c155 | 219 | !exist_written_data(sbi, ino, APPEND_INO)) { |
19c9c466 | 220 | |
9c7bb702 CL |
221 | /* it may call write_inode just prior to fsync */ |
222 | if (need_inode_page_update(sbi, ino)) | |
19c9c466 | 223 | goto go_write; |
19c9c466 | 224 | |
6d99ba41 | 225 | if (is_inode_flag_set(fi, FI_UPDATE_WRITE) || |
2403c155 | 226 | exist_written_data(sbi, ino, UPDATE_INO)) |
6d99ba41 JK |
227 | goto flush_out; |
228 | goto out; | |
229 | } | |
19c9c466 | 230 | go_write: |
7d82db83 JK |
231 | /* guarantee free sections for fsync */ |
232 | f2fs_balance_fs(sbi); | |
233 | ||
e5d2385e JK |
234 | /* |
235 | * Both of fdatasync() and fsync() are able to be recovered from | |
236 | * sudden-power-off. | |
237 | */ | |
9d1589ef CY |
238 | down_read(&fi->i_sem); |
239 | need_cp = need_do_checkpoint(inode); | |
d928bfbf JK |
240 | up_read(&fi->i_sem); |
241 | ||
fbfa2cc5 JK |
242 | if (need_cp) { |
243 | /* all the dirty node pages should be flushed for POR */ | |
244 | ret = f2fs_sync_fs(inode->i_sb, 1); | |
d928bfbf | 245 | |
51455b19 CL |
246 | /* |
247 | * We've secured consistency through sync_fs. Following pino | |
248 | * will be used only for fsynced inodes after checkpoint. | |
249 | */ | |
250 | try_to_fix_pino(inode); | |
cff28521 JK |
251 | clear_inode_flag(fi, FI_APPEND_WRITE); |
252 | clear_inode_flag(fi, FI_UPDATE_WRITE); | |
51455b19 CL |
253 | goto out; |
254 | } | |
88bd02c9 | 255 | sync_nodes: |
51455b19 CL |
256 | sync_node_pages(sbi, ino, &wbc); |
257 | ||
871f599f JK |
258 | /* if cp_error was enabled, we should avoid infinite loop */ |
259 | if (unlikely(f2fs_cp_error(sbi))) | |
260 | goto out; | |
261 | ||
51455b19 CL |
262 | if (need_inode_block_update(sbi, ino)) { |
263 | mark_inode_dirty_sync(inode); | |
264 | f2fs_write_inode(inode, NULL); | |
265 | goto sync_nodes; | |
fbfa2cc5 | 266 | } |
51455b19 CL |
267 | |
268 | ret = wait_on_node_pages_writeback(sbi, ino); | |
269 | if (ret) | |
270 | goto out; | |
271 | ||
272 | /* once recovery info is written, don't need to tack this */ | |
273 | remove_dirty_inode(sbi, ino, APPEND_INO); | |
274 | clear_inode_flag(fi, FI_APPEND_WRITE); | |
275 | flush_out: | |
276 | remove_dirty_inode(sbi, ino, UPDATE_INO); | |
277 | clear_inode_flag(fi, FI_UPDATE_WRITE); | |
278 | ret = f2fs_issue_flush(sbi); | |
fbfa2cc5 | 279 | out: |
a2a4a7e4 | 280 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); |
05ca3632 | 281 | f2fs_trace_ios(NULL, 1); |
fbfa2cc5 JK |
282 | return ret; |
283 | } | |
284 | ||
7f7670fe JK |
285 | static pgoff_t __get_first_dirty_index(struct address_space *mapping, |
286 | pgoff_t pgofs, int whence) | |
287 | { | |
288 | struct pagevec pvec; | |
289 | int nr_pages; | |
290 | ||
291 | if (whence != SEEK_DATA) | |
292 | return 0; | |
293 | ||
294 | /* find first dirty page index */ | |
295 | pagevec_init(&pvec, 0); | |
65b85ccc JK |
296 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs, |
297 | PAGECACHE_TAG_DIRTY, 1); | |
298 | pgofs = nr_pages ? pvec.pages[0]->index : LONG_MAX; | |
7f7670fe JK |
299 | pagevec_release(&pvec); |
300 | return pgofs; | |
301 | } | |
302 | ||
303 | static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs, | |
304 | int whence) | |
305 | { | |
306 | switch (whence) { | |
307 | case SEEK_DATA: | |
308 | if ((blkaddr == NEW_ADDR && dirty == pgofs) || | |
309 | (blkaddr != NEW_ADDR && blkaddr != NULL_ADDR)) | |
310 | return true; | |
311 | break; | |
312 | case SEEK_HOLE: | |
313 | if (blkaddr == NULL_ADDR) | |
314 | return true; | |
315 | break; | |
316 | } | |
317 | return false; | |
318 | } | |
319 | ||
267378d4 CY |
320 | static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence) |
321 | { | |
322 | struct inode *inode = file->f_mapping->host; | |
323 | loff_t maxbytes = inode->i_sb->s_maxbytes; | |
324 | struct dnode_of_data dn; | |
7f7670fe JK |
325 | pgoff_t pgofs, end_offset, dirty; |
326 | loff_t data_ofs = offset; | |
327 | loff_t isize; | |
267378d4 CY |
328 | int err = 0; |
329 | ||
330 | mutex_lock(&inode->i_mutex); | |
331 | ||
332 | isize = i_size_read(inode); | |
333 | if (offset >= isize) | |
334 | goto fail; | |
335 | ||
336 | /* handle inline data case */ | |
622f28ae | 337 | if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) { |
267378d4 CY |
338 | if (whence == SEEK_HOLE) |
339 | data_ofs = isize; | |
340 | goto found; | |
341 | } | |
342 | ||
343 | pgofs = (pgoff_t)(offset >> PAGE_CACHE_SHIFT); | |
344 | ||
7f7670fe JK |
345 | dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence); |
346 | ||
9edcdabf | 347 | for (; data_ofs < isize; data_ofs = (loff_t)pgofs << PAGE_CACHE_SHIFT) { |
267378d4 CY |
348 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
349 | err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE_RA); | |
350 | if (err && err != -ENOENT) { | |
351 | goto fail; | |
352 | } else if (err == -ENOENT) { | |
e1c42045 | 353 | /* direct node does not exists */ |
267378d4 CY |
354 | if (whence == SEEK_DATA) { |
355 | pgofs = PGOFS_OF_NEXT_DNODE(pgofs, | |
356 | F2FS_I(inode)); | |
357 | continue; | |
358 | } else { | |
359 | goto found; | |
360 | } | |
361 | } | |
362 | ||
6b2920a5 | 363 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
267378d4 CY |
364 | |
365 | /* find data/hole in dnode block */ | |
366 | for (; dn.ofs_in_node < end_offset; | |
367 | dn.ofs_in_node++, pgofs++, | |
2e023174 | 368 | data_ofs = (loff_t)pgofs << PAGE_CACHE_SHIFT) { |
267378d4 CY |
369 | block_t blkaddr; |
370 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
371 | ||
7f7670fe | 372 | if (__found_offset(blkaddr, dirty, pgofs, whence)) { |
267378d4 CY |
373 | f2fs_put_dnode(&dn); |
374 | goto found; | |
375 | } | |
376 | } | |
377 | f2fs_put_dnode(&dn); | |
378 | } | |
379 | ||
380 | if (whence == SEEK_DATA) | |
381 | goto fail; | |
267378d4 | 382 | found: |
fe369bc8 JK |
383 | if (whence == SEEK_HOLE && data_ofs > isize) |
384 | data_ofs = isize; | |
267378d4 CY |
385 | mutex_unlock(&inode->i_mutex); |
386 | return vfs_setpos(file, data_ofs, maxbytes); | |
387 | fail: | |
388 | mutex_unlock(&inode->i_mutex); | |
389 | return -ENXIO; | |
390 | } | |
391 | ||
392 | static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence) | |
393 | { | |
394 | struct inode *inode = file->f_mapping->host; | |
395 | loff_t maxbytes = inode->i_sb->s_maxbytes; | |
396 | ||
397 | switch (whence) { | |
398 | case SEEK_SET: | |
399 | case SEEK_CUR: | |
400 | case SEEK_END: | |
401 | return generic_file_llseek_size(file, offset, whence, | |
402 | maxbytes, i_size_read(inode)); | |
403 | case SEEK_DATA: | |
404 | case SEEK_HOLE: | |
0b4c5afd JK |
405 | if (offset < 0) |
406 | return -ENXIO; | |
267378d4 CY |
407 | return f2fs_seek_block(file, offset, whence); |
408 | } | |
409 | ||
410 | return -EINVAL; | |
411 | } | |
412 | ||
fbfa2cc5 JK |
413 | static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma) |
414 | { | |
b3d208f9 JK |
415 | struct inode *inode = file_inode(file); |
416 | ||
fcc85a4d JK |
417 | if (f2fs_encrypted_inode(inode)) { |
418 | int err = f2fs_get_encryption_info(inode); | |
419 | if (err) | |
420 | return 0; | |
421 | } | |
422 | ||
b3d208f9 JK |
423 | /* we don't need to use inline_data strictly */ |
424 | if (f2fs_has_inline_data(inode)) { | |
425 | int err = f2fs_convert_inline_inode(inode); | |
426 | if (err) | |
427 | return err; | |
428 | } | |
429 | ||
fbfa2cc5 JK |
430 | file_accessed(file); |
431 | vma->vm_ops = &f2fs_file_vm_ops; | |
432 | return 0; | |
433 | } | |
434 | ||
fcc85a4d JK |
435 | static int f2fs_file_open(struct inode *inode, struct file *filp) |
436 | { | |
437 | int ret = generic_file_open(inode, filp); | |
438 | ||
439 | if (!ret && f2fs_encrypted_inode(inode)) { | |
440 | ret = f2fs_get_encryption_info(inode); | |
441 | if (ret) | |
442 | ret = -EACCES; | |
443 | } | |
444 | return ret; | |
445 | } | |
446 | ||
b292dcab | 447 | int truncate_data_blocks_range(struct dnode_of_data *dn, int count) |
fbfa2cc5 | 448 | { |
4081363f | 449 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
fbfa2cc5 | 450 | struct f2fs_node *raw_node; |
19b2c30d | 451 | int nr_free = 0, ofs = dn->ofs_in_node, len = count; |
fbfa2cc5 JK |
452 | __le32 *addr; |
453 | ||
45590710 | 454 | raw_node = F2FS_NODE(dn->node_page); |
fbfa2cc5 JK |
455 | addr = blkaddr_in_node(raw_node) + ofs; |
456 | ||
6c311ec6 | 457 | for (; count > 0; count--, addr++, dn->ofs_in_node++) { |
fbfa2cc5 JK |
458 | block_t blkaddr = le32_to_cpu(*addr); |
459 | if (blkaddr == NULL_ADDR) | |
460 | continue; | |
461 | ||
e1509cf2 | 462 | dn->data_blkaddr = NULL_ADDR; |
216a620a | 463 | set_data_blkaddr(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 | } | |
19b2c30d | 470 | |
fbfa2cc5 | 471 | if (nr_free) { |
19b2c30d CY |
472 | pgoff_t fofs; |
473 | /* | |
474 | * once we invalidate valid blkaddr in range [ofs, ofs + count], | |
475 | * we will invalidate all blkaddr in the whole range. | |
476 | */ | |
477 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), | |
478 | F2FS_I(dn->inode)) + ofs; | |
479 | f2fs_update_extent_cache_range(dn, fofs, 0, len); | |
d7cc950b | 480 | dec_valid_block_count(sbi, dn->inode, nr_free); |
fbfa2cc5 JK |
481 | set_page_dirty(dn->node_page); |
482 | sync_inode_page(dn); | |
483 | } | |
484 | dn->ofs_in_node = ofs; | |
51dd6249 NJ |
485 | |
486 | trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid, | |
487 | dn->ofs_in_node, nr_free); | |
fbfa2cc5 JK |
488 | return nr_free; |
489 | } | |
490 | ||
491 | void truncate_data_blocks(struct dnode_of_data *dn) | |
492 | { | |
493 | truncate_data_blocks_range(dn, ADDRS_PER_BLOCK); | |
494 | } | |
495 | ||
0bfcfcca | 496 | static int truncate_partial_data_page(struct inode *inode, u64 from, |
43f3eae1 | 497 | bool cache_only) |
fbfa2cc5 JK |
498 | { |
499 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
43f3eae1 JK |
500 | pgoff_t index = from >> PAGE_CACHE_SHIFT; |
501 | struct address_space *mapping = inode->i_mapping; | |
fbfa2cc5 JK |
502 | struct page *page; |
503 | ||
43f3eae1 | 504 | if (!offset && !cache_only) |
b3d208f9 | 505 | return 0; |
fbfa2cc5 | 506 | |
43f3eae1 JK |
507 | if (cache_only) { |
508 | page = grab_cache_page(mapping, index); | |
509 | if (page && PageUptodate(page)) | |
510 | goto truncate_out; | |
511 | f2fs_put_page(page, 1); | |
b3d208f9 | 512 | return 0; |
43f3eae1 | 513 | } |
fbfa2cc5 | 514 | |
43f3eae1 JK |
515 | page = get_lock_data_page(inode, index); |
516 | if (IS_ERR(page)) | |
517 | return 0; | |
518 | truncate_out: | |
3cb5ad15 | 519 | f2fs_wait_on_page_writeback(page, DATA); |
fbfa2cc5 | 520 | zero_user(page, offset, PAGE_CACHE_SIZE - offset); |
4375a336 | 521 | if (!cache_only || !f2fs_encrypted_inode(inode) || !S_ISREG(inode->i_mode)) |
0bfcfcca | 522 | set_page_dirty(page); |
fbfa2cc5 | 523 | f2fs_put_page(page, 1); |
b3d208f9 | 524 | return 0; |
fbfa2cc5 JK |
525 | } |
526 | ||
764aa3e9 | 527 | int truncate_blocks(struct inode *inode, u64 from, bool lock) |
fbfa2cc5 | 528 | { |
4081363f | 529 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 JK |
530 | unsigned int blocksize = inode->i_sb->s_blocksize; |
531 | struct dnode_of_data dn; | |
532 | pgoff_t free_from; | |
9ffe0fb5 | 533 | int count = 0, err = 0; |
b3d208f9 | 534 | struct page *ipage; |
0bfcfcca | 535 | bool truncate_page = false; |
fbfa2cc5 | 536 | |
51dd6249 NJ |
537 | trace_f2fs_truncate_blocks_enter(inode, from); |
538 | ||
f7ef9b83 | 539 | free_from = (pgoff_t)F2FS_BYTES_TO_BLK(from + blocksize - 1); |
fbfa2cc5 | 540 | |
764aa3e9 JK |
541 | if (lock) |
542 | f2fs_lock_op(sbi); | |
9ffe0fb5 | 543 | |
b3d208f9 JK |
544 | ipage = get_node_page(sbi, inode->i_ino); |
545 | if (IS_ERR(ipage)) { | |
546 | err = PTR_ERR(ipage); | |
547 | goto out; | |
548 | } | |
549 | ||
550 | if (f2fs_has_inline_data(inode)) { | |
0bfcfcca CY |
551 | if (truncate_inline_inode(ipage, from)) |
552 | set_page_dirty(ipage); | |
b3d208f9 | 553 | f2fs_put_page(ipage, 1); |
0bfcfcca | 554 | truncate_page = true; |
b3d208f9 JK |
555 | goto out; |
556 | } | |
557 | ||
558 | set_new_dnode(&dn, inode, ipage, NULL, 0); | |
266e97a8 | 559 | err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE); |
fbfa2cc5 JK |
560 | if (err) { |
561 | if (err == -ENOENT) | |
562 | goto free_next; | |
b3d208f9 | 563 | goto out; |
1ce86bf6 JK |
564 | } |
565 | ||
6403eb1f | 566 | count = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
fbfa2cc5 JK |
567 | |
568 | count -= dn.ofs_in_node; | |
9850cf4a | 569 | f2fs_bug_on(sbi, count < 0); |
39936837 | 570 | |
fbfa2cc5 JK |
571 | if (dn.ofs_in_node || IS_INODE(dn.node_page)) { |
572 | truncate_data_blocks_range(&dn, count); | |
573 | free_from += count; | |
574 | } | |
575 | ||
576 | f2fs_put_dnode(&dn); | |
577 | free_next: | |
578 | err = truncate_inode_blocks(inode, free_from); | |
764d2c80 JK |
579 | out: |
580 | if (lock) | |
581 | f2fs_unlock_op(sbi); | |
b3d208f9 JK |
582 | |
583 | /* lastly zero out the first data page */ | |
584 | if (!err) | |
0bfcfcca | 585 | err = truncate_partial_data_page(inode, from, truncate_page); |
fbfa2cc5 | 586 | |
51dd6249 | 587 | trace_f2fs_truncate_blocks_exit(inode, err); |
fbfa2cc5 JK |
588 | return err; |
589 | } | |
590 | ||
b0154891 | 591 | int f2fs_truncate(struct inode *inode, bool lock) |
fbfa2cc5 | 592 | { |
b0154891 CY |
593 | int err; |
594 | ||
fbfa2cc5 JK |
595 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || |
596 | S_ISLNK(inode->i_mode))) | |
b0154891 | 597 | return 0; |
fbfa2cc5 | 598 | |
51dd6249 NJ |
599 | trace_f2fs_truncate(inode); |
600 | ||
92dffd01 | 601 | /* we should check inline_data size */ |
01b960e9 | 602 | if (f2fs_has_inline_data(inode) && !f2fs_may_inline_data(inode)) { |
b0154891 CY |
603 | err = f2fs_convert_inline_inode(inode); |
604 | if (err) | |
605 | return err; | |
92dffd01 JK |
606 | } |
607 | ||
b0154891 CY |
608 | err = truncate_blocks(inode, i_size_read(inode), lock); |
609 | if (err) | |
610 | return err; | |
611 | ||
612 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
613 | mark_inode_dirty(inode); | |
614 | return 0; | |
fbfa2cc5 JK |
615 | } |
616 | ||
2d4d9fb5 | 617 | int f2fs_getattr(struct vfsmount *mnt, |
fbfa2cc5 JK |
618 | struct dentry *dentry, struct kstat *stat) |
619 | { | |
2b0143b5 | 620 | struct inode *inode = d_inode(dentry); |
fbfa2cc5 JK |
621 | generic_fillattr(inode, stat); |
622 | stat->blocks <<= 3; | |
623 | return 0; | |
624 | } | |
625 | ||
626 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
627 | static void __setattr_copy(struct inode *inode, const struct iattr *attr) | |
628 | { | |
629 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
630 | unsigned int ia_valid = attr->ia_valid; | |
631 | ||
632 | if (ia_valid & ATTR_UID) | |
633 | inode->i_uid = attr->ia_uid; | |
634 | if (ia_valid & ATTR_GID) | |
635 | inode->i_gid = attr->ia_gid; | |
636 | if (ia_valid & ATTR_ATIME) | |
637 | inode->i_atime = timespec_trunc(attr->ia_atime, | |
638 | inode->i_sb->s_time_gran); | |
639 | if (ia_valid & ATTR_MTIME) | |
640 | inode->i_mtime = timespec_trunc(attr->ia_mtime, | |
641 | inode->i_sb->s_time_gran); | |
642 | if (ia_valid & ATTR_CTIME) | |
643 | inode->i_ctime = timespec_trunc(attr->ia_ctime, | |
644 | inode->i_sb->s_time_gran); | |
645 | if (ia_valid & ATTR_MODE) { | |
646 | umode_t mode = attr->ia_mode; | |
647 | ||
648 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
649 | mode &= ~S_ISGID; | |
650 | set_acl_inode(fi, mode); | |
651 | } | |
652 | } | |
653 | #else | |
654 | #define __setattr_copy setattr_copy | |
655 | #endif | |
656 | ||
657 | int f2fs_setattr(struct dentry *dentry, struct iattr *attr) | |
658 | { | |
2b0143b5 | 659 | struct inode *inode = d_inode(dentry); |
fbfa2cc5 JK |
660 | struct f2fs_inode_info *fi = F2FS_I(inode); |
661 | int err; | |
662 | ||
663 | err = inode_change_ok(inode, attr); | |
664 | if (err) | |
665 | return err; | |
666 | ||
09db6a2e | 667 | if (attr->ia_valid & ATTR_SIZE) { |
fcc85a4d JK |
668 | if (f2fs_encrypted_inode(inode) && |
669 | f2fs_get_encryption_info(inode)) | |
670 | return -EACCES; | |
671 | ||
3c454145 | 672 | if (attr->ia_size <= i_size_read(inode)) { |
09db6a2e | 673 | truncate_setsize(inode, attr->ia_size); |
b0154891 CY |
674 | err = f2fs_truncate(inode, true); |
675 | if (err) | |
676 | return err; | |
09db6a2e CY |
677 | f2fs_balance_fs(F2FS_I_SB(inode)); |
678 | } else { | |
679 | /* | |
3c454145 CY |
680 | * do not trim all blocks after i_size if target size is |
681 | * larger than i_size. | |
09db6a2e | 682 | */ |
3c454145 | 683 | truncate_setsize(inode, attr->ia_size); |
345a6b2e | 684 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
09db6a2e | 685 | } |
fbfa2cc5 JK |
686 | } |
687 | ||
688 | __setattr_copy(inode, attr); | |
689 | ||
690 | if (attr->ia_valid & ATTR_MODE) { | |
a6dda0e6 | 691 | err = posix_acl_chmod(inode, get_inode_mode(inode)); |
fbfa2cc5 JK |
692 | if (err || is_inode_flag_set(fi, FI_ACL_MODE)) { |
693 | inode->i_mode = fi->i_acl_mode; | |
694 | clear_inode_flag(fi, FI_ACL_MODE); | |
695 | } | |
696 | } | |
697 | ||
698 | mark_inode_dirty(inode); | |
699 | return err; | |
700 | } | |
701 | ||
702 | const struct inode_operations f2fs_file_inode_operations = { | |
703 | .getattr = f2fs_getattr, | |
704 | .setattr = f2fs_setattr, | |
705 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 706 | .set_acl = f2fs_set_acl, |
fbfa2cc5 JK |
707 | #ifdef CONFIG_F2FS_FS_XATTR |
708 | .setxattr = generic_setxattr, | |
709 | .getxattr = generic_getxattr, | |
710 | .listxattr = f2fs_listxattr, | |
711 | .removexattr = generic_removexattr, | |
712 | #endif | |
9ab70134 | 713 | .fiemap = f2fs_fiemap, |
fbfa2cc5 JK |
714 | }; |
715 | ||
6394328a | 716 | static int fill_zero(struct inode *inode, pgoff_t index, |
fbfa2cc5 JK |
717 | loff_t start, loff_t len) |
718 | { | |
4081363f | 719 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 JK |
720 | struct page *page; |
721 | ||
722 | if (!len) | |
6394328a | 723 | return 0; |
fbfa2cc5 | 724 | |
bd43df02 JK |
725 | f2fs_balance_fs(sbi); |
726 | ||
e479556b | 727 | f2fs_lock_op(sbi); |
64aa7ed9 | 728 | page = get_new_data_page(inode, NULL, index, false); |
e479556b | 729 | f2fs_unlock_op(sbi); |
fbfa2cc5 | 730 | |
6394328a CY |
731 | if (IS_ERR(page)) |
732 | return PTR_ERR(page); | |
733 | ||
734 | f2fs_wait_on_page_writeback(page, DATA); | |
735 | zero_user(page, start, len); | |
736 | set_page_dirty(page); | |
737 | f2fs_put_page(page, 1); | |
738 | return 0; | |
fbfa2cc5 JK |
739 | } |
740 | ||
741 | int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) | |
742 | { | |
fbfa2cc5 JK |
743 | int err; |
744 | ||
ea58711e | 745 | while (pg_start < pg_end) { |
fbfa2cc5 | 746 | struct dnode_of_data dn; |
ea58711e | 747 | pgoff_t end_offset, count; |
9eaeba70 | 748 | |
fbfa2cc5 | 749 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
ea58711e | 750 | err = get_dnode_of_data(&dn, pg_start, LOOKUP_NODE); |
fbfa2cc5 | 751 | if (err) { |
ea58711e CY |
752 | if (err == -ENOENT) { |
753 | pg_start++; | |
fbfa2cc5 | 754 | continue; |
ea58711e | 755 | } |
fbfa2cc5 JK |
756 | return err; |
757 | } | |
758 | ||
ea58711e CY |
759 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
760 | count = min(end_offset - dn.ofs_in_node, pg_end - pg_start); | |
761 | ||
762 | f2fs_bug_on(F2FS_I_SB(inode), count == 0 || count > end_offset); | |
763 | ||
764 | truncate_data_blocks_range(&dn, count); | |
fbfa2cc5 | 765 | f2fs_put_dnode(&dn); |
ea58711e CY |
766 | |
767 | pg_start += count; | |
fbfa2cc5 JK |
768 | } |
769 | return 0; | |
770 | } | |
771 | ||
a66c7b2f | 772 | static int punch_hole(struct inode *inode, loff_t offset, loff_t len) |
fbfa2cc5 JK |
773 | { |
774 | pgoff_t pg_start, pg_end; | |
775 | loff_t off_start, off_end; | |
776 | int ret = 0; | |
777 | ||
b3d208f9 JK |
778 | if (f2fs_has_inline_data(inode)) { |
779 | ret = f2fs_convert_inline_inode(inode); | |
780 | if (ret) | |
781 | return ret; | |
782 | } | |
9ffe0fb5 | 783 | |
fbfa2cc5 JK |
784 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; |
785 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
786 | ||
787 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
788 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
789 | ||
790 | if (pg_start == pg_end) { | |
6394328a | 791 | ret = fill_zero(inode, pg_start, off_start, |
fbfa2cc5 | 792 | off_end - off_start); |
6394328a CY |
793 | if (ret) |
794 | return ret; | |
fbfa2cc5 | 795 | } else { |
6394328a CY |
796 | if (off_start) { |
797 | ret = fill_zero(inode, pg_start++, off_start, | |
798 | PAGE_CACHE_SIZE - off_start); | |
799 | if (ret) | |
800 | return ret; | |
801 | } | |
802 | if (off_end) { | |
803 | ret = fill_zero(inode, pg_end, 0, off_end); | |
804 | if (ret) | |
805 | return ret; | |
806 | } | |
fbfa2cc5 JK |
807 | |
808 | if (pg_start < pg_end) { | |
809 | struct address_space *mapping = inode->i_mapping; | |
810 | loff_t blk_start, blk_end; | |
4081363f | 811 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
1127a3d4 JH |
812 | |
813 | f2fs_balance_fs(sbi); | |
fbfa2cc5 | 814 | |
9edcdabf CY |
815 | blk_start = (loff_t)pg_start << PAGE_CACHE_SHIFT; |
816 | blk_end = (loff_t)pg_end << PAGE_CACHE_SHIFT; | |
fbfa2cc5 JK |
817 | truncate_inode_pages_range(mapping, blk_start, |
818 | blk_end - 1); | |
39936837 | 819 | |
e479556b | 820 | f2fs_lock_op(sbi); |
fbfa2cc5 | 821 | ret = truncate_hole(inode, pg_start, pg_end); |
e479556b | 822 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
823 | } |
824 | } | |
825 | ||
fbfa2cc5 JK |
826 | return ret; |
827 | } | |
828 | ||
b4ace337 CY |
829 | static int f2fs_do_collapse(struct inode *inode, pgoff_t start, pgoff_t end) |
830 | { | |
831 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
832 | struct dnode_of_data dn; | |
833 | pgoff_t nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE; | |
834 | int ret = 0; | |
835 | ||
b4ace337 CY |
836 | for (; end < nrpages; start++, end++) { |
837 | block_t new_addr, old_addr; | |
838 | ||
ecbaa406 CY |
839 | f2fs_lock_op(sbi); |
840 | ||
b4ace337 CY |
841 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
842 | ret = get_dnode_of_data(&dn, end, LOOKUP_NODE_RA); | |
843 | if (ret && ret != -ENOENT) { | |
844 | goto out; | |
845 | } else if (ret == -ENOENT) { | |
846 | new_addr = NULL_ADDR; | |
847 | } else { | |
848 | new_addr = dn.data_blkaddr; | |
849 | truncate_data_blocks_range(&dn, 1); | |
850 | f2fs_put_dnode(&dn); | |
851 | } | |
852 | ||
853 | if (new_addr == NULL_ADDR) { | |
854 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
855 | ret = get_dnode_of_data(&dn, start, LOOKUP_NODE_RA); | |
ecbaa406 | 856 | if (ret && ret != -ENOENT) { |
b4ace337 | 857 | goto out; |
ecbaa406 CY |
858 | } else if (ret == -ENOENT) { |
859 | f2fs_unlock_op(sbi); | |
b4ace337 | 860 | continue; |
ecbaa406 | 861 | } |
b4ace337 CY |
862 | |
863 | if (dn.data_blkaddr == NULL_ADDR) { | |
864 | f2fs_put_dnode(&dn); | |
ecbaa406 | 865 | f2fs_unlock_op(sbi); |
b4ace337 CY |
866 | continue; |
867 | } else { | |
868 | truncate_data_blocks_range(&dn, 1); | |
869 | } | |
870 | ||
871 | f2fs_put_dnode(&dn); | |
872 | } else { | |
873 | struct page *ipage; | |
874 | ||
875 | ipage = get_node_page(sbi, inode->i_ino); | |
876 | if (IS_ERR(ipage)) { | |
877 | ret = PTR_ERR(ipage); | |
878 | goto out; | |
879 | } | |
880 | ||
881 | set_new_dnode(&dn, inode, ipage, NULL, 0); | |
882 | ret = f2fs_reserve_block(&dn, start); | |
883 | if (ret) | |
884 | goto out; | |
885 | ||
886 | old_addr = dn.data_blkaddr; | |
887 | if (old_addr != NEW_ADDR && new_addr == NEW_ADDR) { | |
888 | dn.data_blkaddr = NULL_ADDR; | |
889 | f2fs_update_extent_cache(&dn); | |
890 | invalidate_blocks(sbi, old_addr); | |
891 | ||
892 | dn.data_blkaddr = new_addr; | |
893 | set_data_blkaddr(&dn); | |
894 | } else if (new_addr != NEW_ADDR) { | |
895 | struct node_info ni; | |
b4ace337 CY |
896 | |
897 | get_node_info(sbi, dn.nid, &ni); | |
528e3459 CY |
898 | f2fs_replace_block(sbi, &dn, old_addr, new_addr, |
899 | ni.version, true); | |
b4ace337 CY |
900 | } |
901 | ||
902 | f2fs_put_dnode(&dn); | |
903 | } | |
ecbaa406 | 904 | f2fs_unlock_op(sbi); |
b4ace337 | 905 | } |
ecbaa406 | 906 | return 0; |
b4ace337 CY |
907 | out: |
908 | f2fs_unlock_op(sbi); | |
909 | return ret; | |
910 | } | |
911 | ||
912 | static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len) | |
913 | { | |
914 | pgoff_t pg_start, pg_end; | |
915 | loff_t new_size; | |
916 | int ret; | |
917 | ||
b4ace337 CY |
918 | if (offset + len >= i_size_read(inode)) |
919 | return -EINVAL; | |
920 | ||
921 | /* collapse range should be aligned to block size of f2fs. */ | |
922 | if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1)) | |
923 | return -EINVAL; | |
924 | ||
97a7b2c2 JK |
925 | f2fs_balance_fs(F2FS_I_SB(inode)); |
926 | ||
927 | if (f2fs_has_inline_data(inode)) { | |
928 | ret = f2fs_convert_inline_inode(inode); | |
929 | if (ret) | |
930 | return ret; | |
931 | } | |
932 | ||
b4ace337 CY |
933 | pg_start = offset >> PAGE_CACHE_SHIFT; |
934 | pg_end = (offset + len) >> PAGE_CACHE_SHIFT; | |
935 | ||
936 | /* write out all dirty pages from offset */ | |
937 | ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); | |
938 | if (ret) | |
939 | return ret; | |
940 | ||
941 | truncate_pagecache(inode, offset); | |
942 | ||
943 | ret = f2fs_do_collapse(inode, pg_start, pg_end); | |
944 | if (ret) | |
945 | return ret; | |
946 | ||
947 | new_size = i_size_read(inode) - len; | |
948 | ||
949 | ret = truncate_blocks(inode, new_size, true); | |
950 | if (!ret) | |
951 | i_size_write(inode, new_size); | |
952 | ||
953 | return ret; | |
954 | } | |
955 | ||
75cd4e09 CY |
956 | static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len, |
957 | int mode) | |
958 | { | |
959 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
960 | struct address_space *mapping = inode->i_mapping; | |
961 | pgoff_t index, pg_start, pg_end; | |
962 | loff_t new_size = i_size_read(inode); | |
963 | loff_t off_start, off_end; | |
964 | int ret = 0; | |
965 | ||
75cd4e09 CY |
966 | ret = inode_newsize_ok(inode, (len + offset)); |
967 | if (ret) | |
968 | return ret; | |
969 | ||
970 | f2fs_balance_fs(sbi); | |
971 | ||
972 | if (f2fs_has_inline_data(inode)) { | |
973 | ret = f2fs_convert_inline_inode(inode); | |
974 | if (ret) | |
975 | return ret; | |
976 | } | |
977 | ||
978 | ret = filemap_write_and_wait_range(mapping, offset, offset + len - 1); | |
979 | if (ret) | |
980 | return ret; | |
981 | ||
982 | truncate_pagecache_range(inode, offset, offset + len - 1); | |
983 | ||
984 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; | |
985 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
986 | ||
987 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
988 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
989 | ||
990 | if (pg_start == pg_end) { | |
6394328a CY |
991 | ret = fill_zero(inode, pg_start, off_start, |
992 | off_end - off_start); | |
993 | if (ret) | |
994 | return ret; | |
995 | ||
75cd4e09 CY |
996 | if (offset + len > new_size) |
997 | new_size = offset + len; | |
998 | new_size = max_t(loff_t, new_size, offset + len); | |
999 | } else { | |
1000 | if (off_start) { | |
6394328a CY |
1001 | ret = fill_zero(inode, pg_start++, off_start, |
1002 | PAGE_CACHE_SIZE - off_start); | |
1003 | if (ret) | |
1004 | return ret; | |
1005 | ||
75cd4e09 | 1006 | new_size = max_t(loff_t, new_size, |
9edcdabf | 1007 | (loff_t)pg_start << PAGE_CACHE_SHIFT); |
75cd4e09 CY |
1008 | } |
1009 | ||
1010 | for (index = pg_start; index < pg_end; index++) { | |
1011 | struct dnode_of_data dn; | |
1012 | struct page *ipage; | |
1013 | ||
1014 | f2fs_lock_op(sbi); | |
1015 | ||
1016 | ipage = get_node_page(sbi, inode->i_ino); | |
1017 | if (IS_ERR(ipage)) { | |
1018 | ret = PTR_ERR(ipage); | |
1019 | f2fs_unlock_op(sbi); | |
1020 | goto out; | |
1021 | } | |
1022 | ||
1023 | set_new_dnode(&dn, inode, ipage, NULL, 0); | |
1024 | ret = f2fs_reserve_block(&dn, index); | |
1025 | if (ret) { | |
1026 | f2fs_unlock_op(sbi); | |
1027 | goto out; | |
1028 | } | |
1029 | ||
1030 | if (dn.data_blkaddr != NEW_ADDR) { | |
1031 | invalidate_blocks(sbi, dn.data_blkaddr); | |
1032 | ||
1033 | dn.data_blkaddr = NEW_ADDR; | |
1034 | set_data_blkaddr(&dn); | |
1035 | ||
1036 | dn.data_blkaddr = NULL_ADDR; | |
1037 | f2fs_update_extent_cache(&dn); | |
1038 | } | |
1039 | f2fs_put_dnode(&dn); | |
1040 | f2fs_unlock_op(sbi); | |
1041 | ||
1042 | new_size = max_t(loff_t, new_size, | |
9edcdabf | 1043 | (loff_t)(index + 1) << PAGE_CACHE_SHIFT); |
75cd4e09 CY |
1044 | } |
1045 | ||
1046 | if (off_end) { | |
6394328a CY |
1047 | ret = fill_zero(inode, pg_end, 0, off_end); |
1048 | if (ret) | |
1049 | goto out; | |
1050 | ||
75cd4e09 CY |
1051 | new_size = max_t(loff_t, new_size, offset + len); |
1052 | } | |
1053 | } | |
1054 | ||
1055 | out: | |
1056 | if (!(mode & FALLOC_FL_KEEP_SIZE) && i_size_read(inode) < new_size) { | |
1057 | i_size_write(inode, new_size); | |
1058 | mark_inode_dirty(inode); | |
1059 | update_inode_page(inode); | |
1060 | } | |
1061 | ||
1062 | return ret; | |
1063 | } | |
1064 | ||
f62185d0 CY |
1065 | static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len) |
1066 | { | |
1067 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1068 | pgoff_t pg_start, pg_end, delta, nrpages, idx; | |
1069 | loff_t new_size; | |
1070 | int ret; | |
1071 | ||
f62185d0 CY |
1072 | new_size = i_size_read(inode) + len; |
1073 | if (new_size > inode->i_sb->s_maxbytes) | |
1074 | return -EFBIG; | |
1075 | ||
1076 | if (offset >= i_size_read(inode)) | |
1077 | return -EINVAL; | |
1078 | ||
1079 | /* insert range should be aligned to block size of f2fs. */ | |
1080 | if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1)) | |
1081 | return -EINVAL; | |
1082 | ||
1083 | f2fs_balance_fs(sbi); | |
1084 | ||
97a7b2c2 JK |
1085 | if (f2fs_has_inline_data(inode)) { |
1086 | ret = f2fs_convert_inline_inode(inode); | |
1087 | if (ret) | |
1088 | return ret; | |
1089 | } | |
1090 | ||
f62185d0 CY |
1091 | ret = truncate_blocks(inode, i_size_read(inode), true); |
1092 | if (ret) | |
1093 | return ret; | |
1094 | ||
1095 | /* write out all dirty pages from offset */ | |
1096 | ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); | |
1097 | if (ret) | |
1098 | return ret; | |
1099 | ||
1100 | truncate_pagecache(inode, offset); | |
1101 | ||
1102 | pg_start = offset >> PAGE_CACHE_SHIFT; | |
1103 | pg_end = (offset + len) >> PAGE_CACHE_SHIFT; | |
1104 | delta = pg_end - pg_start; | |
1105 | nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE; | |
1106 | ||
1107 | for (idx = nrpages - 1; idx >= pg_start && idx != -1; idx--) { | |
1108 | struct dnode_of_data dn; | |
1109 | struct page *ipage; | |
1110 | block_t new_addr, old_addr; | |
1111 | ||
1112 | f2fs_lock_op(sbi); | |
1113 | ||
1114 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
1115 | ret = get_dnode_of_data(&dn, idx, LOOKUP_NODE_RA); | |
1116 | if (ret && ret != -ENOENT) { | |
1117 | goto out; | |
1118 | } else if (ret == -ENOENT) { | |
1119 | goto next; | |
1120 | } else if (dn.data_blkaddr == NULL_ADDR) { | |
1121 | f2fs_put_dnode(&dn); | |
1122 | goto next; | |
1123 | } else { | |
1124 | new_addr = dn.data_blkaddr; | |
1125 | truncate_data_blocks_range(&dn, 1); | |
1126 | f2fs_put_dnode(&dn); | |
1127 | } | |
1128 | ||
1129 | ipage = get_node_page(sbi, inode->i_ino); | |
1130 | if (IS_ERR(ipage)) { | |
1131 | ret = PTR_ERR(ipage); | |
1132 | goto out; | |
1133 | } | |
1134 | ||
1135 | set_new_dnode(&dn, inode, ipage, NULL, 0); | |
1136 | ret = f2fs_reserve_block(&dn, idx + delta); | |
1137 | if (ret) | |
1138 | goto out; | |
1139 | ||
1140 | old_addr = dn.data_blkaddr; | |
1141 | f2fs_bug_on(sbi, old_addr != NEW_ADDR); | |
1142 | ||
1143 | if (new_addr != NEW_ADDR) { | |
1144 | struct node_info ni; | |
1145 | ||
1146 | get_node_info(sbi, dn.nid, &ni); | |
1147 | f2fs_replace_block(sbi, &dn, old_addr, new_addr, | |
1148 | ni.version, true); | |
1149 | } | |
1150 | f2fs_put_dnode(&dn); | |
1151 | next: | |
1152 | f2fs_unlock_op(sbi); | |
1153 | } | |
1154 | ||
1155 | i_size_write(inode, new_size); | |
1156 | return 0; | |
1157 | out: | |
1158 | f2fs_unlock_op(sbi); | |
1159 | return ret; | |
1160 | } | |
1161 | ||
fbfa2cc5 JK |
1162 | static int expand_inode_data(struct inode *inode, loff_t offset, |
1163 | loff_t len, int mode) | |
1164 | { | |
4081363f | 1165 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 JK |
1166 | pgoff_t index, pg_start, pg_end; |
1167 | loff_t new_size = i_size_read(inode); | |
1168 | loff_t off_start, off_end; | |
1169 | int ret = 0; | |
1170 | ||
497a0930 CY |
1171 | f2fs_balance_fs(sbi); |
1172 | ||
fbfa2cc5 JK |
1173 | ret = inode_newsize_ok(inode, (len + offset)); |
1174 | if (ret) | |
1175 | return ret; | |
1176 | ||
b3d208f9 JK |
1177 | if (f2fs_has_inline_data(inode)) { |
1178 | ret = f2fs_convert_inline_inode(inode); | |
1179 | if (ret) | |
1180 | return ret; | |
1181 | } | |
9e09fc85 | 1182 | |
fbfa2cc5 JK |
1183 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; |
1184 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
1185 | ||
1186 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
1187 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
1188 | ||
ead43275 JK |
1189 | f2fs_lock_op(sbi); |
1190 | ||
fbfa2cc5 JK |
1191 | for (index = pg_start; index <= pg_end; index++) { |
1192 | struct dnode_of_data dn; | |
1193 | ||
98397ff3 JK |
1194 | if (index == pg_end && !off_end) |
1195 | goto noalloc; | |
1196 | ||
fbfa2cc5 | 1197 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
b600965c | 1198 | ret = f2fs_reserve_block(&dn, index); |
b600965c | 1199 | if (ret) |
fbfa2cc5 | 1200 | break; |
98397ff3 | 1201 | noalloc: |
fbfa2cc5 JK |
1202 | if (pg_start == pg_end) |
1203 | new_size = offset + len; | |
1204 | else if (index == pg_start && off_start) | |
9edcdabf | 1205 | new_size = (loff_t)(index + 1) << PAGE_CACHE_SHIFT; |
fbfa2cc5 | 1206 | else if (index == pg_end) |
9edcdabf CY |
1207 | new_size = ((loff_t)index << PAGE_CACHE_SHIFT) + |
1208 | off_end; | |
fbfa2cc5 JK |
1209 | else |
1210 | new_size += PAGE_CACHE_SIZE; | |
1211 | } | |
1212 | ||
1213 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
1214 | i_size_read(inode) < new_size) { | |
1215 | i_size_write(inode, new_size); | |
1216 | mark_inode_dirty(inode); | |
ead43275 | 1217 | update_inode_page(inode); |
fbfa2cc5 | 1218 | } |
ead43275 | 1219 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
1220 | |
1221 | return ret; | |
1222 | } | |
1223 | ||
1224 | static long f2fs_fallocate(struct file *file, int mode, | |
1225 | loff_t offset, loff_t len) | |
1226 | { | |
6131ffaa | 1227 | struct inode *inode = file_inode(file); |
587c0a42 | 1228 | long ret = 0; |
fbfa2cc5 | 1229 | |
c998012b CY |
1230 | /* f2fs only support ->fallocate for regular file */ |
1231 | if (!S_ISREG(inode->i_mode)) | |
1232 | return -EINVAL; | |
1233 | ||
f62185d0 CY |
1234 | if (f2fs_encrypted_inode(inode) && |
1235 | (mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE))) | |
fcc85a4d JK |
1236 | return -EOPNOTSUPP; |
1237 | ||
b4ace337 | 1238 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE | |
f62185d0 CY |
1239 | FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE | |
1240 | FALLOC_FL_INSERT_RANGE)) | |
fbfa2cc5 JK |
1241 | return -EOPNOTSUPP; |
1242 | ||
3375f696 CY |
1243 | mutex_lock(&inode->i_mutex); |
1244 | ||
587c0a42 TY |
1245 | if (mode & FALLOC_FL_PUNCH_HOLE) { |
1246 | if (offset >= inode->i_size) | |
1247 | goto out; | |
1248 | ||
a66c7b2f | 1249 | ret = punch_hole(inode, offset, len); |
b4ace337 CY |
1250 | } else if (mode & FALLOC_FL_COLLAPSE_RANGE) { |
1251 | ret = f2fs_collapse_range(inode, offset, len); | |
75cd4e09 CY |
1252 | } else if (mode & FALLOC_FL_ZERO_RANGE) { |
1253 | ret = f2fs_zero_range(inode, offset, len, mode); | |
f62185d0 CY |
1254 | } else if (mode & FALLOC_FL_INSERT_RANGE) { |
1255 | ret = f2fs_insert_range(inode, offset, len); | |
b4ace337 | 1256 | } else { |
fbfa2cc5 | 1257 | ret = expand_inode_data(inode, offset, len, mode); |
b4ace337 | 1258 | } |
fbfa2cc5 | 1259 | |
3af60a49 NJ |
1260 | if (!ret) { |
1261 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
1262 | mark_inode_dirty(inode); | |
1263 | } | |
3375f696 | 1264 | |
587c0a42 | 1265 | out: |
3375f696 CY |
1266 | mutex_unlock(&inode->i_mutex); |
1267 | ||
c01e2853 | 1268 | trace_f2fs_fallocate(inode, mode, offset, len, ret); |
fbfa2cc5 JK |
1269 | return ret; |
1270 | } | |
1271 | ||
1e84371f JK |
1272 | static int f2fs_release_file(struct inode *inode, struct file *filp) |
1273 | { | |
1274 | /* some remained atomic pages should discarded */ | |
1275 | if (f2fs_is_atomic_file(inode)) | |
1276 | commit_inmem_pages(inode, true); | |
1277 | if (f2fs_is_volatile_file(inode)) { | |
1278 | set_inode_flag(F2FS_I(inode), FI_DROP_CACHE); | |
1279 | filemap_fdatawrite(inode->i_mapping); | |
1280 | clear_inode_flag(F2FS_I(inode), FI_DROP_CACHE); | |
1281 | } | |
1282 | return 0; | |
1283 | } | |
1284 | ||
fbfa2cc5 JK |
1285 | #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL)) |
1286 | #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL) | |
1287 | ||
1288 | static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags) | |
1289 | { | |
1290 | if (S_ISDIR(mode)) | |
1291 | return flags; | |
1292 | else if (S_ISREG(mode)) | |
1293 | return flags & F2FS_REG_FLMASK; | |
1294 | else | |
1295 | return flags & F2FS_OTHER_FLMASK; | |
1296 | } | |
1297 | ||
52656e6c | 1298 | static int f2fs_ioc_getflags(struct file *filp, unsigned long arg) |
fbfa2cc5 | 1299 | { |
6131ffaa | 1300 | struct inode *inode = file_inode(filp); |
fbfa2cc5 | 1301 | struct f2fs_inode_info *fi = F2FS_I(inode); |
52656e6c JK |
1302 | unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE; |
1303 | return put_user(flags, (int __user *)arg); | |
1304 | } | |
fbfa2cc5 | 1305 | |
52656e6c JK |
1306 | static int f2fs_ioc_setflags(struct file *filp, unsigned long arg) |
1307 | { | |
1308 | struct inode *inode = file_inode(filp); | |
1309 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
1310 | unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE; | |
1311 | unsigned int oldflags; | |
1312 | int ret; | |
fbfa2cc5 | 1313 | |
52656e6c JK |
1314 | ret = mnt_want_write_file(filp); |
1315 | if (ret) | |
1316 | return ret; | |
fbfa2cc5 | 1317 | |
52656e6c JK |
1318 | if (!inode_owner_or_capable(inode)) { |
1319 | ret = -EACCES; | |
1320 | goto out; | |
1321 | } | |
fbfa2cc5 | 1322 | |
52656e6c JK |
1323 | if (get_user(flags, (int __user *)arg)) { |
1324 | ret = -EFAULT; | |
1325 | goto out; | |
1326 | } | |
fbfa2cc5 | 1327 | |
52656e6c | 1328 | flags = f2fs_mask_flags(inode->i_mode, flags); |
fbfa2cc5 | 1329 | |
52656e6c | 1330 | mutex_lock(&inode->i_mutex); |
fbfa2cc5 | 1331 | |
52656e6c | 1332 | oldflags = fi->i_flags; |
fbfa2cc5 | 1333 | |
52656e6c JK |
1334 | if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { |
1335 | if (!capable(CAP_LINUX_IMMUTABLE)) { | |
1336 | mutex_unlock(&inode->i_mutex); | |
1337 | ret = -EPERM; | |
1338 | goto out; | |
fbfa2cc5 | 1339 | } |
52656e6c | 1340 | } |
fbfa2cc5 | 1341 | |
52656e6c JK |
1342 | flags = flags & FS_FL_USER_MODIFIABLE; |
1343 | flags |= oldflags & ~FS_FL_USER_MODIFIABLE; | |
1344 | fi->i_flags = flags; | |
1345 | mutex_unlock(&inode->i_mutex); | |
fbfa2cc5 | 1346 | |
52656e6c JK |
1347 | f2fs_set_inode_flags(inode); |
1348 | inode->i_ctime = CURRENT_TIME; | |
1349 | mark_inode_dirty(inode); | |
fbfa2cc5 | 1350 | out: |
52656e6c JK |
1351 | mnt_drop_write_file(filp); |
1352 | return ret; | |
1353 | } | |
4b2fecc8 | 1354 | |
d49f3e89 CY |
1355 | static int f2fs_ioc_getversion(struct file *filp, unsigned long arg) |
1356 | { | |
1357 | struct inode *inode = file_inode(filp); | |
1358 | ||
1359 | return put_user(inode->i_generation, (int __user *)arg); | |
1360 | } | |
1361 | ||
88b88a66 JK |
1362 | static int f2fs_ioc_start_atomic_write(struct file *filp) |
1363 | { | |
1364 | struct inode *inode = file_inode(filp); | |
f4c9c743 | 1365 | int ret; |
88b88a66 JK |
1366 | |
1367 | if (!inode_owner_or_capable(inode)) | |
1368 | return -EACCES; | |
1369 | ||
1e84371f JK |
1370 | f2fs_balance_fs(F2FS_I_SB(inode)); |
1371 | ||
1372 | if (f2fs_is_atomic_file(inode)) | |
1373 | return 0; | |
88b88a66 | 1374 | |
f4c9c743 CY |
1375 | ret = f2fs_convert_inline_inode(inode); |
1376 | if (ret) | |
1377 | return ret; | |
88b88a66 | 1378 | |
f4c9c743 CY |
1379 | set_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); |
1380 | return 0; | |
88b88a66 JK |
1381 | } |
1382 | ||
1383 | static int f2fs_ioc_commit_atomic_write(struct file *filp) | |
1384 | { | |
1385 | struct inode *inode = file_inode(filp); | |
1386 | int ret; | |
1387 | ||
1388 | if (!inode_owner_or_capable(inode)) | |
1389 | return -EACCES; | |
1390 | ||
02a1335f JK |
1391 | if (f2fs_is_volatile_file(inode)) |
1392 | return 0; | |
1393 | ||
88b88a66 JK |
1394 | ret = mnt_want_write_file(filp); |
1395 | if (ret) | |
1396 | return ret; | |
1397 | ||
6282adbf JK |
1398 | if (f2fs_is_atomic_file(inode)) { |
1399 | clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); | |
edb27dee JK |
1400 | ret = commit_inmem_pages(inode, false); |
1401 | if (ret) | |
1402 | goto err_out; | |
6282adbf | 1403 | } |
88b88a66 | 1404 | |
a5f64b6a | 1405 | ret = f2fs_sync_file(filp, 0, LLONG_MAX, 0); |
edb27dee | 1406 | err_out: |
88b88a66 JK |
1407 | mnt_drop_write_file(filp); |
1408 | return ret; | |
1409 | } | |
1410 | ||
02a1335f JK |
1411 | static int f2fs_ioc_start_volatile_write(struct file *filp) |
1412 | { | |
1413 | struct inode *inode = file_inode(filp); | |
f4c9c743 | 1414 | int ret; |
02a1335f JK |
1415 | |
1416 | if (!inode_owner_or_capable(inode)) | |
1417 | return -EACCES; | |
1418 | ||
1e84371f JK |
1419 | if (f2fs_is_volatile_file(inode)) |
1420 | return 0; | |
1421 | ||
f4c9c743 CY |
1422 | ret = f2fs_convert_inline_inode(inode); |
1423 | if (ret) | |
1424 | return ret; | |
b3d208f9 | 1425 | |
f4c9c743 CY |
1426 | set_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE); |
1427 | return 0; | |
02a1335f JK |
1428 | } |
1429 | ||
1e84371f JK |
1430 | static int f2fs_ioc_release_volatile_write(struct file *filp) |
1431 | { | |
1432 | struct inode *inode = file_inode(filp); | |
1433 | ||
1434 | if (!inode_owner_or_capable(inode)) | |
1435 | return -EACCES; | |
1436 | ||
1437 | if (!f2fs_is_volatile_file(inode)) | |
1438 | return 0; | |
1439 | ||
3c6c2beb JK |
1440 | if (!f2fs_is_first_block_written(inode)) |
1441 | return truncate_partial_data_page(inode, 0, true); | |
1442 | ||
538e17e7 | 1443 | return punch_hole(inode, 0, F2FS_BLKSIZE); |
1e84371f JK |
1444 | } |
1445 | ||
1446 | static int f2fs_ioc_abort_volatile_write(struct file *filp) | |
1447 | { | |
1448 | struct inode *inode = file_inode(filp); | |
1449 | int ret; | |
1450 | ||
1451 | if (!inode_owner_or_capable(inode)) | |
1452 | return -EACCES; | |
1453 | ||
1454 | ret = mnt_want_write_file(filp); | |
1455 | if (ret) | |
1456 | return ret; | |
1457 | ||
1458 | f2fs_balance_fs(F2FS_I_SB(inode)); | |
1459 | ||
1460 | if (f2fs_is_atomic_file(inode)) { | |
1e84371f | 1461 | clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); |
edb27dee | 1462 | commit_inmem_pages(inode, true); |
1e84371f JK |
1463 | } |
1464 | ||
de6a8ec9 | 1465 | if (f2fs_is_volatile_file(inode)) |
1e84371f | 1466 | clear_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE); |
de6a8ec9 | 1467 | |
1e84371f JK |
1468 | mnt_drop_write_file(filp); |
1469 | return ret; | |
1470 | } | |
1471 | ||
1abff93d JK |
1472 | static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg) |
1473 | { | |
1474 | struct inode *inode = file_inode(filp); | |
1475 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1476 | struct super_block *sb = sbi->sb; | |
1477 | __u32 in; | |
1478 | ||
1479 | if (!capable(CAP_SYS_ADMIN)) | |
1480 | return -EPERM; | |
1481 | ||
1482 | if (get_user(in, (__u32 __user *)arg)) | |
1483 | return -EFAULT; | |
1484 | ||
1485 | switch (in) { | |
1486 | case F2FS_GOING_DOWN_FULLSYNC: | |
1487 | sb = freeze_bdev(sb->s_bdev); | |
1488 | if (sb && !IS_ERR(sb)) { | |
1489 | f2fs_stop_checkpoint(sbi); | |
1490 | thaw_bdev(sb->s_bdev, sb); | |
1491 | } | |
1492 | break; | |
1493 | case F2FS_GOING_DOWN_METASYNC: | |
1494 | /* do checkpoint only */ | |
1495 | f2fs_sync_fs(sb, 1); | |
1496 | f2fs_stop_checkpoint(sbi); | |
1497 | break; | |
1498 | case F2FS_GOING_DOWN_NOSYNC: | |
1499 | f2fs_stop_checkpoint(sbi); | |
1500 | break; | |
1501 | default: | |
1502 | return -EINVAL; | |
1503 | } | |
1504 | return 0; | |
1505 | } | |
1506 | ||
52656e6c JK |
1507 | static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg) |
1508 | { | |
1509 | struct inode *inode = file_inode(filp); | |
1510 | struct super_block *sb = inode->i_sb; | |
1511 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
1512 | struct fstrim_range range; | |
1513 | int ret; | |
4b2fecc8 | 1514 | |
52656e6c JK |
1515 | if (!capable(CAP_SYS_ADMIN)) |
1516 | return -EPERM; | |
4b2fecc8 | 1517 | |
52656e6c JK |
1518 | if (!blk_queue_discard(q)) |
1519 | return -EOPNOTSUPP; | |
4b2fecc8 | 1520 | |
52656e6c JK |
1521 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
1522 | sizeof(range))) | |
1523 | return -EFAULT; | |
4b2fecc8 | 1524 | |
52656e6c JK |
1525 | range.minlen = max((unsigned int)range.minlen, |
1526 | q->limits.discard_granularity); | |
1527 | ret = f2fs_trim_fs(F2FS_SB(sb), &range); | |
1528 | if (ret < 0) | |
1529 | return ret; | |
4b2fecc8 | 1530 | |
52656e6c JK |
1531 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
1532 | sizeof(range))) | |
1533 | return -EFAULT; | |
1534 | return 0; | |
1535 | } | |
1536 | ||
f424f664 JK |
1537 | static bool uuid_is_nonzero(__u8 u[16]) |
1538 | { | |
1539 | int i; | |
1540 | ||
1541 | for (i = 0; i < 16; i++) | |
1542 | if (u[i]) | |
1543 | return true; | |
1544 | return false; | |
1545 | } | |
1546 | ||
1547 | static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg) | |
1548 | { | |
1549 | #ifdef CONFIG_F2FS_FS_ENCRYPTION | |
1550 | struct f2fs_encryption_policy policy; | |
1551 | struct inode *inode = file_inode(filp); | |
1552 | ||
1553 | if (copy_from_user(&policy, (struct f2fs_encryption_policy __user *)arg, | |
1554 | sizeof(policy))) | |
1555 | return -EFAULT; | |
1556 | ||
f424f664 JK |
1557 | return f2fs_process_policy(&policy, inode); |
1558 | #else | |
1559 | return -EOPNOTSUPP; | |
1560 | #endif | |
1561 | } | |
1562 | ||
1563 | static int f2fs_ioc_get_encryption_policy(struct file *filp, unsigned long arg) | |
1564 | { | |
1565 | #ifdef CONFIG_F2FS_FS_ENCRYPTION | |
1566 | struct f2fs_encryption_policy policy; | |
1567 | struct inode *inode = file_inode(filp); | |
1568 | int err; | |
1569 | ||
1570 | err = f2fs_get_policy(inode, &policy); | |
1571 | if (err) | |
1572 | return err; | |
1573 | ||
1574 | if (copy_to_user((struct f2fs_encryption_policy __user *)arg, &policy, | |
1575 | sizeof(policy))) | |
1576 | return -EFAULT; | |
1577 | return 0; | |
1578 | #else | |
1579 | return -EOPNOTSUPP; | |
1580 | #endif | |
1581 | } | |
1582 | ||
1583 | static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg) | |
1584 | { | |
1585 | struct inode *inode = file_inode(filp); | |
1586 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1587 | int err; | |
1588 | ||
1589 | if (!f2fs_sb_has_crypto(inode->i_sb)) | |
1590 | return -EOPNOTSUPP; | |
1591 | ||
1592 | if (uuid_is_nonzero(sbi->raw_super->encrypt_pw_salt)) | |
1593 | goto got_it; | |
1594 | ||
1595 | err = mnt_want_write_file(filp); | |
1596 | if (err) | |
1597 | return err; | |
1598 | ||
1599 | /* update superblock with uuid */ | |
1600 | generate_random_uuid(sbi->raw_super->encrypt_pw_salt); | |
1601 | ||
c5bda1c8 | 1602 | err = f2fs_commit_super(sbi, false); |
f424f664 JK |
1603 | |
1604 | mnt_drop_write_file(filp); | |
1605 | if (err) { | |
1606 | /* undo new data */ | |
1607 | memset(sbi->raw_super->encrypt_pw_salt, 0, 16); | |
1608 | return err; | |
1609 | } | |
1610 | got_it: | |
1611 | if (copy_to_user((__u8 __user *)arg, sbi->raw_super->encrypt_pw_salt, | |
1612 | 16)) | |
1613 | return -EFAULT; | |
1614 | return 0; | |
1615 | } | |
1616 | ||
c1c1b583 CY |
1617 | static int f2fs_ioc_gc(struct file *filp, unsigned long arg) |
1618 | { | |
1619 | struct inode *inode = file_inode(filp); | |
1620 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
d530d4d8 | 1621 | __u32 sync; |
c1c1b583 CY |
1622 | |
1623 | if (!capable(CAP_SYS_ADMIN)) | |
1624 | return -EPERM; | |
1625 | ||
d530d4d8 | 1626 | if (get_user(sync, (__u32 __user *)arg)) |
c1c1b583 CY |
1627 | return -EFAULT; |
1628 | ||
d530d4d8 CY |
1629 | if (f2fs_readonly(sbi->sb)) |
1630 | return -EROFS; | |
c1c1b583 | 1631 | |
d530d4d8 | 1632 | if (!sync) { |
c1c1b583 | 1633 | if (!mutex_trylock(&sbi->gc_mutex)) |
d530d4d8 CY |
1634 | return -EBUSY; |
1635 | } else { | |
1636 | mutex_lock(&sbi->gc_mutex); | |
c1c1b583 CY |
1637 | } |
1638 | ||
d530d4d8 | 1639 | return f2fs_gc(sbi, sync); |
c1c1b583 CY |
1640 | } |
1641 | ||
456b88e4 CY |
1642 | static int f2fs_ioc_write_checkpoint(struct file *filp, unsigned long arg) |
1643 | { | |
1644 | struct inode *inode = file_inode(filp); | |
1645 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1646 | struct cp_control cpc; | |
1647 | ||
1648 | if (!capable(CAP_SYS_ADMIN)) | |
1649 | return -EPERM; | |
1650 | ||
1651 | if (f2fs_readonly(sbi->sb)) | |
1652 | return -EROFS; | |
1653 | ||
1654 | cpc.reason = __get_cp_reason(sbi); | |
1655 | ||
1656 | mutex_lock(&sbi->gc_mutex); | |
1657 | write_checkpoint(sbi, &cpc); | |
1658 | mutex_unlock(&sbi->gc_mutex); | |
1659 | ||
1660 | return 0; | |
1661 | } | |
1662 | ||
52656e6c JK |
1663 | long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
1664 | { | |
1665 | switch (cmd) { | |
1666 | case F2FS_IOC_GETFLAGS: | |
1667 | return f2fs_ioc_getflags(filp, arg); | |
1668 | case F2FS_IOC_SETFLAGS: | |
1669 | return f2fs_ioc_setflags(filp, arg); | |
d49f3e89 CY |
1670 | case F2FS_IOC_GETVERSION: |
1671 | return f2fs_ioc_getversion(filp, arg); | |
88b88a66 JK |
1672 | case F2FS_IOC_START_ATOMIC_WRITE: |
1673 | return f2fs_ioc_start_atomic_write(filp); | |
1674 | case F2FS_IOC_COMMIT_ATOMIC_WRITE: | |
1675 | return f2fs_ioc_commit_atomic_write(filp); | |
02a1335f JK |
1676 | case F2FS_IOC_START_VOLATILE_WRITE: |
1677 | return f2fs_ioc_start_volatile_write(filp); | |
1e84371f JK |
1678 | case F2FS_IOC_RELEASE_VOLATILE_WRITE: |
1679 | return f2fs_ioc_release_volatile_write(filp); | |
1680 | case F2FS_IOC_ABORT_VOLATILE_WRITE: | |
1681 | return f2fs_ioc_abort_volatile_write(filp); | |
1abff93d JK |
1682 | case F2FS_IOC_SHUTDOWN: |
1683 | return f2fs_ioc_shutdown(filp, arg); | |
52656e6c JK |
1684 | case FITRIM: |
1685 | return f2fs_ioc_fitrim(filp, arg); | |
f424f664 JK |
1686 | case F2FS_IOC_SET_ENCRYPTION_POLICY: |
1687 | return f2fs_ioc_set_encryption_policy(filp, arg); | |
1688 | case F2FS_IOC_GET_ENCRYPTION_POLICY: | |
1689 | return f2fs_ioc_get_encryption_policy(filp, arg); | |
1690 | case F2FS_IOC_GET_ENCRYPTION_PWSALT: | |
1691 | return f2fs_ioc_get_encryption_pwsalt(filp, arg); | |
c1c1b583 CY |
1692 | case F2FS_IOC_GARBAGE_COLLECT: |
1693 | return f2fs_ioc_gc(filp, arg); | |
456b88e4 CY |
1694 | case F2FS_IOC_WRITE_CHECKPOINT: |
1695 | return f2fs_ioc_write_checkpoint(filp, arg); | |
fbfa2cc5 JK |
1696 | default: |
1697 | return -ENOTTY; | |
1698 | } | |
1699 | } | |
1700 | ||
fcc85a4d JK |
1701 | static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) |
1702 | { | |
1703 | struct inode *inode = file_inode(iocb->ki_filp); | |
1704 | ||
1705 | if (f2fs_encrypted_inode(inode) && | |
1706 | !f2fs_has_encryption_key(inode) && | |
1707 | f2fs_get_encryption_info(inode)) | |
1708 | return -EACCES; | |
1709 | ||
1710 | return generic_file_write_iter(iocb, from); | |
1711 | } | |
1712 | ||
e9750824 NJ |
1713 | #ifdef CONFIG_COMPAT |
1714 | long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
1715 | { | |
1716 | switch (cmd) { | |
1717 | case F2FS_IOC32_GETFLAGS: | |
1718 | cmd = F2FS_IOC_GETFLAGS; | |
1719 | break; | |
1720 | case F2FS_IOC32_SETFLAGS: | |
1721 | cmd = F2FS_IOC_SETFLAGS; | |
1722 | break; | |
1723 | default: | |
1724 | return -ENOIOCTLCMD; | |
1725 | } | |
1726 | return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); | |
1727 | } | |
1728 | #endif | |
1729 | ||
fbfa2cc5 | 1730 | const struct file_operations f2fs_file_operations = { |
267378d4 | 1731 | .llseek = f2fs_llseek, |
aad4f8bb | 1732 | .read_iter = generic_file_read_iter, |
fcc85a4d JK |
1733 | .write_iter = f2fs_file_write_iter, |
1734 | .open = f2fs_file_open, | |
12662234 | 1735 | .release = f2fs_release_file, |
fbfa2cc5 JK |
1736 | .mmap = f2fs_file_mmap, |
1737 | .fsync = f2fs_sync_file, | |
1738 | .fallocate = f2fs_fallocate, | |
1739 | .unlocked_ioctl = f2fs_ioctl, | |
e9750824 NJ |
1740 | #ifdef CONFIG_COMPAT |
1741 | .compat_ioctl = f2fs_compat_ioctl, | |
1742 | #endif | |
fbfa2cc5 | 1743 | .splice_read = generic_file_splice_read, |
8d020765 | 1744 | .splice_write = iter_file_splice_write, |
fbfa2cc5 | 1745 | }; |