Commit | Line | Data |
---|---|---|
0a8165d7 | 1 | /* |
fbfa2cc5 JK |
2 | * fs/f2fs/file.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/fs.h> | |
12 | #include <linux/f2fs_fs.h> | |
13 | #include <linux/stat.h> | |
14 | #include <linux/buffer_head.h> | |
15 | #include <linux/writeback.h> | |
ae51fb31 | 16 | #include <linux/blkdev.h> |
fbfa2cc5 JK |
17 | #include <linux/falloc.h> |
18 | #include <linux/types.h> | |
e9750824 | 19 | #include <linux/compat.h> |
fbfa2cc5 JK |
20 | #include <linux/uaccess.h> |
21 | #include <linux/mount.h> | |
7f7670fe | 22 | #include <linux/pagevec.h> |
f424f664 | 23 | #include <linux/random.h> |
fbfa2cc5 JK |
24 | |
25 | #include "f2fs.h" | |
26 | #include "node.h" | |
27 | #include "segment.h" | |
28 | #include "xattr.h" | |
29 | #include "acl.h" | |
c1c1b583 | 30 | #include "gc.h" |
db9f7c1a | 31 | #include "trace.h" |
a2a4a7e4 | 32 | #include <trace/events/f2fs.h> |
fbfa2cc5 JK |
33 | |
34 | static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma, | |
35 | struct vm_fault *vmf) | |
36 | { | |
37 | struct page *page = vmf->page; | |
6131ffaa | 38 | struct inode *inode = file_inode(vma->vm_file); |
4081363f | 39 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 | 40 | struct dnode_of_data dn; |
e479556b | 41 | int err; |
fbfa2cc5 | 42 | |
fbfa2cc5 | 43 | sb_start_pagefault(inode->i_sb); |
b3d208f9 JK |
44 | |
45 | f2fs_bug_on(sbi, f2fs_has_inline_data(inode)); | |
b067ba1f | 46 | |
fbfa2cc5 | 47 | /* block allocation */ |
e479556b | 48 | f2fs_lock_op(sbi); |
b3d208f9 | 49 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
b600965c | 50 | err = f2fs_reserve_block(&dn, page->index); |
9ba69cf9 JK |
51 | if (err) { |
52 | f2fs_unlock_op(sbi); | |
b600965c | 53 | goto out; |
9ba69cf9 JK |
54 | } |
55 | f2fs_put_dnode(&dn); | |
56 | f2fs_unlock_op(sbi); | |
fbfa2cc5 | 57 | |
2c4db1a6 | 58 | f2fs_balance_fs(sbi, dn.node_changed); |
2a340760 | 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 */ | |
09cbfeaf | 77 | if (((loff_t)(page->index + 1) << PAGE_SHIFT) > |
9edcdabf | 78 | i_size_read(inode)) { |
fbfa2cc5 | 79 | unsigned offset; |
09cbfeaf KS |
80 | offset = i_size_read(inode) & ~PAGE_MASK; |
81 | zero_user_segment(page, offset, PAGE_SIZE); | |
fbfa2cc5 JK |
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 */ | |
fec1d657 | 89 | f2fs_wait_on_page_writeback(page, DATA, false); |
08b39fbd CY |
90 | |
91 | /* wait for GCed encrypted page writeback */ | |
92 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) | |
93 | f2fs_wait_on_encrypted_page_writeback(sbi, dn.data_blkaddr); | |
94 | ||
5b339124 CY |
95 | /* if gced page is attached, don't write to cold segment */ |
96 | clear_cold_data(page); | |
fbfa2cc5 JK |
97 | out: |
98 | sb_end_pagefault(inode->i_sb); | |
d0239e1b | 99 | f2fs_update_time(sbi, REQ_TIME); |
fbfa2cc5 JK |
100 | return block_page_mkwrite_return(err); |
101 | } | |
102 | ||
103 | static const struct vm_operations_struct f2fs_file_vm_ops = { | |
692bb55d | 104 | .fault = filemap_fault, |
f1820361 | 105 | .map_pages = filemap_map_pages, |
692bb55d | 106 | .page_mkwrite = f2fs_vm_page_mkwrite, |
fbfa2cc5 JK |
107 | }; |
108 | ||
354a3399 JK |
109 | static int get_parent_ino(struct inode *inode, nid_t *pino) |
110 | { | |
111 | struct dentry *dentry; | |
112 | ||
113 | inode = igrab(inode); | |
114 | dentry = d_find_any_alias(inode); | |
115 | iput(inode); | |
116 | if (!dentry) | |
117 | return 0; | |
118 | ||
e7d55452 | 119 | if (update_dent_inode(inode, inode, &dentry->d_name)) { |
f0947e5c JK |
120 | dput(dentry); |
121 | return 0; | |
122 | } | |
354a3399 | 123 | |
f0947e5c JK |
124 | *pino = parent_ino(dentry); |
125 | dput(dentry); | |
354a3399 JK |
126 | return 1; |
127 | } | |
128 | ||
9d1589ef CY |
129 | static inline bool need_do_checkpoint(struct inode *inode) |
130 | { | |
4081363f | 131 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
9d1589ef CY |
132 | bool need_cp = false; |
133 | ||
134 | if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1) | |
135 | need_cp = true; | |
e7d55452 JK |
136 | else if (file_enc_name(inode) && need_dentry_mark(sbi, inode->i_ino)) |
137 | need_cp = true; | |
9d1589ef CY |
138 | else if (file_wrong_pino(inode)) |
139 | need_cp = true; | |
140 | else if (!space_for_roll_forward(sbi)) | |
141 | need_cp = true; | |
142 | else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino)) | |
143 | need_cp = true; | |
144 | else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi))) | |
145 | need_cp = true; | |
d5053a34 JK |
146 | else if (test_opt(sbi, FASTBOOT)) |
147 | need_cp = true; | |
a344b9fd JK |
148 | else if (sbi->active_logs == 2) |
149 | need_cp = true; | |
9d1589ef CY |
150 | |
151 | return need_cp; | |
152 | } | |
153 | ||
9c7bb702 CL |
154 | static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino) |
155 | { | |
156 | struct page *i = find_get_page(NODE_MAPPING(sbi), ino); | |
157 | bool ret = false; | |
158 | /* But we need to avoid that there are some inode updates */ | |
159 | if ((i && PageDirty(i)) || need_inode_block_update(sbi, ino)) | |
160 | ret = true; | |
161 | f2fs_put_page(i, 0); | |
162 | return ret; | |
163 | } | |
164 | ||
51455b19 CL |
165 | static void try_to_fix_pino(struct inode *inode) |
166 | { | |
167 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
168 | nid_t pino; | |
169 | ||
170 | down_write(&fi->i_sem); | |
171 | fi->xattr_ver = 0; | |
172 | if (file_wrong_pino(inode) && inode->i_nlink == 1 && | |
173 | get_parent_ino(inode, &pino)) { | |
174 | fi->i_pino = pino; | |
175 | file_got_pino(inode); | |
176 | up_write(&fi->i_sem); | |
177 | ||
178 | mark_inode_dirty_sync(inode); | |
179 | f2fs_write_inode(inode, NULL); | |
180 | } else { | |
181 | up_write(&fi->i_sem); | |
182 | } | |
183 | } | |
184 | ||
fbfa2cc5 JK |
185 | int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) |
186 | { | |
187 | struct inode *inode = file->f_mapping->host; | |
d928bfbf | 188 | struct f2fs_inode_info *fi = F2FS_I(inode); |
4081363f | 189 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
2403c155 | 190 | nid_t ino = inode->i_ino; |
fbfa2cc5 JK |
191 | int ret = 0; |
192 | bool need_cp = false; | |
193 | struct writeback_control wbc = { | |
c81bf1c8 | 194 | .sync_mode = WB_SYNC_ALL, |
fbfa2cc5 JK |
195 | .nr_to_write = LONG_MAX, |
196 | .for_reclaim = 0, | |
197 | }; | |
198 | ||
6bacf52f | 199 | if (unlikely(f2fs_readonly(inode->i_sb))) |
1fa95b0b NJ |
200 | return 0; |
201 | ||
a2a4a7e4 | 202 | trace_f2fs_sync_file_enter(inode); |
ea1aa12c JK |
203 | |
204 | /* if fdatasync is triggered, let's do in-place-update */ | |
c46a155b | 205 | if (datasync || get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks) |
ea1aa12c | 206 | set_inode_flag(fi, FI_NEED_IPU); |
fbfa2cc5 | 207 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
c1ce1b02 JK |
208 | clear_inode_flag(fi, FI_NEED_IPU); |
209 | ||
a2a4a7e4 NJ |
210 | if (ret) { |
211 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); | |
fbfa2cc5 | 212 | return ret; |
a2a4a7e4 | 213 | } |
fbfa2cc5 | 214 | |
9c7bb702 | 215 | /* if the inode is dirty, let's recover all the time */ |
2286c020 JK |
216 | if (!datasync) { |
217 | f2fs_write_inode(inode, NULL); | |
9c7bb702 CL |
218 | goto go_write; |
219 | } | |
220 | ||
6d99ba41 JK |
221 | /* |
222 | * if there is no written data, don't waste time to write recovery info. | |
223 | */ | |
224 | if (!is_inode_flag_set(fi, FI_APPEND_WRITE) && | |
2403c155 | 225 | !exist_written_data(sbi, ino, APPEND_INO)) { |
19c9c466 | 226 | |
9c7bb702 CL |
227 | /* it may call write_inode just prior to fsync */ |
228 | if (need_inode_page_update(sbi, ino)) | |
19c9c466 | 229 | goto go_write; |
19c9c466 | 230 | |
6d99ba41 | 231 | if (is_inode_flag_set(fi, FI_UPDATE_WRITE) || |
2403c155 | 232 | exist_written_data(sbi, ino, UPDATE_INO)) |
6d99ba41 JK |
233 | goto flush_out; |
234 | goto out; | |
235 | } | |
19c9c466 | 236 | go_write: |
e5d2385e JK |
237 | /* |
238 | * Both of fdatasync() and fsync() are able to be recovered from | |
239 | * sudden-power-off. | |
240 | */ | |
9d1589ef CY |
241 | down_read(&fi->i_sem); |
242 | need_cp = need_do_checkpoint(inode); | |
d928bfbf JK |
243 | up_read(&fi->i_sem); |
244 | ||
fbfa2cc5 JK |
245 | if (need_cp) { |
246 | /* all the dirty node pages should be flushed for POR */ | |
247 | ret = f2fs_sync_fs(inode->i_sb, 1); | |
d928bfbf | 248 | |
51455b19 CL |
249 | /* |
250 | * We've secured consistency through sync_fs. Following pino | |
251 | * will be used only for fsynced inodes after checkpoint. | |
252 | */ | |
253 | try_to_fix_pino(inode); | |
cff28521 JK |
254 | clear_inode_flag(fi, FI_APPEND_WRITE); |
255 | clear_inode_flag(fi, FI_UPDATE_WRITE); | |
51455b19 CL |
256 | goto out; |
257 | } | |
88bd02c9 | 258 | sync_nodes: |
51455b19 CL |
259 | sync_node_pages(sbi, ino, &wbc); |
260 | ||
871f599f | 261 | /* if cp_error was enabled, we should avoid infinite loop */ |
6d5a1495 CY |
262 | if (unlikely(f2fs_cp_error(sbi))) { |
263 | ret = -EIO; | |
871f599f | 264 | goto out; |
6d5a1495 | 265 | } |
871f599f | 266 | |
51455b19 CL |
267 | if (need_inode_block_update(sbi, ino)) { |
268 | mark_inode_dirty_sync(inode); | |
269 | f2fs_write_inode(inode, NULL); | |
270 | goto sync_nodes; | |
fbfa2cc5 | 271 | } |
51455b19 CL |
272 | |
273 | ret = wait_on_node_pages_writeback(sbi, ino); | |
274 | if (ret) | |
275 | goto out; | |
276 | ||
277 | /* once recovery info is written, don't need to tack this */ | |
a49324f1 | 278 | remove_ino_entry(sbi, ino, APPEND_INO); |
51455b19 CL |
279 | clear_inode_flag(fi, FI_APPEND_WRITE); |
280 | flush_out: | |
a49324f1 | 281 | remove_ino_entry(sbi, ino, UPDATE_INO); |
51455b19 CL |
282 | clear_inode_flag(fi, FI_UPDATE_WRITE); |
283 | ret = f2fs_issue_flush(sbi); | |
d0239e1b | 284 | f2fs_update_time(sbi, REQ_TIME); |
fbfa2cc5 | 285 | out: |
a2a4a7e4 | 286 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); |
05ca3632 | 287 | f2fs_trace_ios(NULL, 1); |
fbfa2cc5 JK |
288 | return ret; |
289 | } | |
290 | ||
7f7670fe JK |
291 | static pgoff_t __get_first_dirty_index(struct address_space *mapping, |
292 | pgoff_t pgofs, int whence) | |
293 | { | |
294 | struct pagevec pvec; | |
295 | int nr_pages; | |
296 | ||
297 | if (whence != SEEK_DATA) | |
298 | return 0; | |
299 | ||
300 | /* find first dirty page index */ | |
301 | pagevec_init(&pvec, 0); | |
65b85ccc JK |
302 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs, |
303 | PAGECACHE_TAG_DIRTY, 1); | |
80dd9c0e | 304 | pgofs = nr_pages ? pvec.pages[0]->index : ULONG_MAX; |
7f7670fe JK |
305 | pagevec_release(&pvec); |
306 | return pgofs; | |
307 | } | |
308 | ||
309 | static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs, | |
310 | int whence) | |
311 | { | |
312 | switch (whence) { | |
313 | case SEEK_DATA: | |
314 | if ((blkaddr == NEW_ADDR && dirty == pgofs) || | |
315 | (blkaddr != NEW_ADDR && blkaddr != NULL_ADDR)) | |
316 | return true; | |
317 | break; | |
318 | case SEEK_HOLE: | |
319 | if (blkaddr == NULL_ADDR) | |
320 | return true; | |
321 | break; | |
322 | } | |
323 | return false; | |
324 | } | |
325 | ||
267378d4 CY |
326 | static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence) |
327 | { | |
328 | struct inode *inode = file->f_mapping->host; | |
329 | loff_t maxbytes = inode->i_sb->s_maxbytes; | |
330 | struct dnode_of_data dn; | |
7f7670fe JK |
331 | pgoff_t pgofs, end_offset, dirty; |
332 | loff_t data_ofs = offset; | |
333 | loff_t isize; | |
267378d4 CY |
334 | int err = 0; |
335 | ||
5955102c | 336 | inode_lock(inode); |
267378d4 CY |
337 | |
338 | isize = i_size_read(inode); | |
339 | if (offset >= isize) | |
340 | goto fail; | |
341 | ||
342 | /* handle inline data case */ | |
622f28ae | 343 | if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) { |
267378d4 CY |
344 | if (whence == SEEK_HOLE) |
345 | data_ofs = isize; | |
346 | goto found; | |
347 | } | |
348 | ||
09cbfeaf | 349 | pgofs = (pgoff_t)(offset >> PAGE_SHIFT); |
267378d4 | 350 | |
7f7670fe JK |
351 | dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence); |
352 | ||
09cbfeaf | 353 | for (; data_ofs < isize; data_ofs = (loff_t)pgofs << PAGE_SHIFT) { |
267378d4 CY |
354 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
355 | err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE_RA); | |
356 | if (err && err != -ENOENT) { | |
357 | goto fail; | |
358 | } else if (err == -ENOENT) { | |
e1c42045 | 359 | /* direct node does not exists */ |
267378d4 | 360 | if (whence == SEEK_DATA) { |
3cf45747 | 361 | pgofs = get_next_page_offset(&dn, pgofs); |
267378d4 CY |
362 | continue; |
363 | } else { | |
364 | goto found; | |
365 | } | |
366 | } | |
367 | ||
81ca7350 | 368 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
267378d4 CY |
369 | |
370 | /* find data/hole in dnode block */ | |
371 | for (; dn.ofs_in_node < end_offset; | |
372 | dn.ofs_in_node++, pgofs++, | |
09cbfeaf | 373 | data_ofs = (loff_t)pgofs << PAGE_SHIFT) { |
267378d4 CY |
374 | block_t blkaddr; |
375 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
376 | ||
7f7670fe | 377 | if (__found_offset(blkaddr, dirty, pgofs, whence)) { |
267378d4 CY |
378 | f2fs_put_dnode(&dn); |
379 | goto found; | |
380 | } | |
381 | } | |
382 | f2fs_put_dnode(&dn); | |
383 | } | |
384 | ||
385 | if (whence == SEEK_DATA) | |
386 | goto fail; | |
267378d4 | 387 | found: |
fe369bc8 JK |
388 | if (whence == SEEK_HOLE && data_ofs > isize) |
389 | data_ofs = isize; | |
5955102c | 390 | inode_unlock(inode); |
267378d4 CY |
391 | return vfs_setpos(file, data_ofs, maxbytes); |
392 | fail: | |
5955102c | 393 | inode_unlock(inode); |
267378d4 CY |
394 | return -ENXIO; |
395 | } | |
396 | ||
397 | static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence) | |
398 | { | |
399 | struct inode *inode = file->f_mapping->host; | |
400 | loff_t maxbytes = inode->i_sb->s_maxbytes; | |
401 | ||
402 | switch (whence) { | |
403 | case SEEK_SET: | |
404 | case SEEK_CUR: | |
405 | case SEEK_END: | |
406 | return generic_file_llseek_size(file, offset, whence, | |
407 | maxbytes, i_size_read(inode)); | |
408 | case SEEK_DATA: | |
409 | case SEEK_HOLE: | |
0b4c5afd JK |
410 | if (offset < 0) |
411 | return -ENXIO; | |
267378d4 CY |
412 | return f2fs_seek_block(file, offset, whence); |
413 | } | |
414 | ||
415 | return -EINVAL; | |
416 | } | |
417 | ||
fbfa2cc5 JK |
418 | static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma) |
419 | { | |
b3d208f9 | 420 | struct inode *inode = file_inode(file); |
b9d777b8 | 421 | int err; |
b3d208f9 | 422 | |
fcc85a4d | 423 | if (f2fs_encrypted_inode(inode)) { |
0b81d077 | 424 | err = fscrypt_get_encryption_info(inode); |
fcc85a4d JK |
425 | if (err) |
426 | return 0; | |
ae108668 CY |
427 | if (!f2fs_encrypted_inode(inode)) |
428 | return -ENOKEY; | |
fcc85a4d JK |
429 | } |
430 | ||
b3d208f9 | 431 | /* we don't need to use inline_data strictly */ |
b9d777b8 JK |
432 | err = f2fs_convert_inline_inode(inode); |
433 | if (err) | |
434 | return err; | |
b3d208f9 | 435 | |
fbfa2cc5 JK |
436 | file_accessed(file); |
437 | vma->vm_ops = &f2fs_file_vm_ops; | |
438 | return 0; | |
439 | } | |
440 | ||
fcc85a4d JK |
441 | static int f2fs_file_open(struct inode *inode, struct file *filp) |
442 | { | |
443 | int ret = generic_file_open(inode, filp); | |
33b13951 | 444 | struct dentry *dir; |
fcc85a4d JK |
445 | |
446 | if (!ret && f2fs_encrypted_inode(inode)) { | |
0b81d077 | 447 | ret = fscrypt_get_encryption_info(inode); |
fcc85a4d | 448 | if (ret) |
ae108668 | 449 | return -EACCES; |
0b81d077 | 450 | if (!fscrypt_has_encryption_key(inode)) |
ae108668 | 451 | return -ENOKEY; |
fcc85a4d | 452 | } |
33b13951 JK |
453 | dir = dget_parent(file_dentry(filp)); |
454 | if (f2fs_encrypted_inode(d_inode(dir)) && | |
455 | !fscrypt_has_permitted_context(d_inode(dir), inode)) { | |
456 | dput(dir); | |
8074bb51 | 457 | return -EPERM; |
33b13951 JK |
458 | } |
459 | dput(dir); | |
fcc85a4d JK |
460 | return ret; |
461 | } | |
462 | ||
b292dcab | 463 | int truncate_data_blocks_range(struct dnode_of_data *dn, int count) |
fbfa2cc5 | 464 | { |
4081363f | 465 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
fbfa2cc5 | 466 | struct f2fs_node *raw_node; |
19b2c30d | 467 | int nr_free = 0, ofs = dn->ofs_in_node, len = count; |
fbfa2cc5 JK |
468 | __le32 *addr; |
469 | ||
45590710 | 470 | raw_node = F2FS_NODE(dn->node_page); |
fbfa2cc5 JK |
471 | addr = blkaddr_in_node(raw_node) + ofs; |
472 | ||
6c311ec6 | 473 | for (; count > 0; count--, addr++, dn->ofs_in_node++) { |
fbfa2cc5 JK |
474 | block_t blkaddr = le32_to_cpu(*addr); |
475 | if (blkaddr == NULL_ADDR) | |
476 | continue; | |
477 | ||
e1509cf2 | 478 | dn->data_blkaddr = NULL_ADDR; |
216a620a | 479 | set_data_blkaddr(dn); |
fbfa2cc5 | 480 | invalidate_blocks(sbi, blkaddr); |
3c6c2beb JK |
481 | if (dn->ofs_in_node == 0 && IS_INODE(dn->node_page)) |
482 | clear_inode_flag(F2FS_I(dn->inode), | |
483 | FI_FIRST_BLOCK_WRITTEN); | |
fbfa2cc5 JK |
484 | nr_free++; |
485 | } | |
19b2c30d | 486 | |
fbfa2cc5 | 487 | if (nr_free) { |
19b2c30d CY |
488 | pgoff_t fofs; |
489 | /* | |
490 | * once we invalidate valid blkaddr in range [ofs, ofs + count], | |
491 | * we will invalidate all blkaddr in the whole range. | |
492 | */ | |
493 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), | |
81ca7350 | 494 | dn->inode) + ofs; |
19b2c30d | 495 | f2fs_update_extent_cache_range(dn, fofs, 0, len); |
d7cc950b | 496 | dec_valid_block_count(sbi, dn->inode, nr_free); |
fbfa2cc5 JK |
497 | sync_inode_page(dn); |
498 | } | |
499 | dn->ofs_in_node = ofs; | |
51dd6249 | 500 | |
d0239e1b | 501 | f2fs_update_time(sbi, REQ_TIME); |
51dd6249 NJ |
502 | trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid, |
503 | dn->ofs_in_node, nr_free); | |
fbfa2cc5 JK |
504 | return nr_free; |
505 | } | |
506 | ||
507 | void truncate_data_blocks(struct dnode_of_data *dn) | |
508 | { | |
509 | truncate_data_blocks_range(dn, ADDRS_PER_BLOCK); | |
510 | } | |
511 | ||
0bfcfcca | 512 | static int truncate_partial_data_page(struct inode *inode, u64 from, |
43f3eae1 | 513 | bool cache_only) |
fbfa2cc5 | 514 | { |
09cbfeaf KS |
515 | unsigned offset = from & (PAGE_SIZE - 1); |
516 | pgoff_t index = from >> PAGE_SHIFT; | |
43f3eae1 | 517 | struct address_space *mapping = inode->i_mapping; |
fbfa2cc5 JK |
518 | struct page *page; |
519 | ||
43f3eae1 | 520 | if (!offset && !cache_only) |
b3d208f9 | 521 | return 0; |
fbfa2cc5 | 522 | |
43f3eae1 | 523 | if (cache_only) { |
a56c7c6f | 524 | page = f2fs_grab_cache_page(mapping, index, false); |
43f3eae1 JK |
525 | if (page && PageUptodate(page)) |
526 | goto truncate_out; | |
527 | f2fs_put_page(page, 1); | |
b3d208f9 | 528 | return 0; |
43f3eae1 | 529 | } |
fbfa2cc5 | 530 | |
a56c7c6f | 531 | page = get_lock_data_page(inode, index, true); |
43f3eae1 JK |
532 | if (IS_ERR(page)) |
533 | return 0; | |
534 | truncate_out: | |
fec1d657 | 535 | f2fs_wait_on_page_writeback(page, DATA, true); |
09cbfeaf | 536 | zero_user(page, offset, PAGE_SIZE - offset); |
0b81d077 JK |
537 | if (!cache_only || !f2fs_encrypted_inode(inode) || |
538 | !S_ISREG(inode->i_mode)) | |
0bfcfcca | 539 | set_page_dirty(page); |
fbfa2cc5 | 540 | f2fs_put_page(page, 1); |
b3d208f9 | 541 | return 0; |
fbfa2cc5 JK |
542 | } |
543 | ||
764aa3e9 | 544 | int truncate_blocks(struct inode *inode, u64 from, bool lock) |
fbfa2cc5 | 545 | { |
4081363f | 546 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 JK |
547 | unsigned int blocksize = inode->i_sb->s_blocksize; |
548 | struct dnode_of_data dn; | |
549 | pgoff_t free_from; | |
9ffe0fb5 | 550 | int count = 0, err = 0; |
b3d208f9 | 551 | struct page *ipage; |
0bfcfcca | 552 | bool truncate_page = false; |
fbfa2cc5 | 553 | |
51dd6249 NJ |
554 | trace_f2fs_truncate_blocks_enter(inode, from); |
555 | ||
f7ef9b83 | 556 | free_from = (pgoff_t)F2FS_BYTES_TO_BLK(from + blocksize - 1); |
fbfa2cc5 | 557 | |
764aa3e9 JK |
558 | if (lock) |
559 | f2fs_lock_op(sbi); | |
9ffe0fb5 | 560 | |
b3d208f9 JK |
561 | ipage = get_node_page(sbi, inode->i_ino); |
562 | if (IS_ERR(ipage)) { | |
563 | err = PTR_ERR(ipage); | |
564 | goto out; | |
565 | } | |
566 | ||
567 | if (f2fs_has_inline_data(inode)) { | |
0bfcfcca CY |
568 | if (truncate_inline_inode(ipage, from)) |
569 | set_page_dirty(ipage); | |
b3d208f9 | 570 | f2fs_put_page(ipage, 1); |
0bfcfcca | 571 | truncate_page = true; |
b3d208f9 JK |
572 | goto out; |
573 | } | |
574 | ||
575 | set_new_dnode(&dn, inode, ipage, NULL, 0); | |
266e97a8 | 576 | err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE); |
fbfa2cc5 JK |
577 | if (err) { |
578 | if (err == -ENOENT) | |
579 | goto free_next; | |
b3d208f9 | 580 | goto out; |
1ce86bf6 JK |
581 | } |
582 | ||
81ca7350 | 583 | count = ADDRS_PER_PAGE(dn.node_page, inode); |
fbfa2cc5 JK |
584 | |
585 | count -= dn.ofs_in_node; | |
9850cf4a | 586 | f2fs_bug_on(sbi, count < 0); |
39936837 | 587 | |
fbfa2cc5 JK |
588 | if (dn.ofs_in_node || IS_INODE(dn.node_page)) { |
589 | truncate_data_blocks_range(&dn, count); | |
590 | free_from += count; | |
591 | } | |
592 | ||
593 | f2fs_put_dnode(&dn); | |
594 | free_next: | |
595 | err = truncate_inode_blocks(inode, free_from); | |
764d2c80 JK |
596 | out: |
597 | if (lock) | |
598 | f2fs_unlock_op(sbi); | |
b3d208f9 JK |
599 | |
600 | /* lastly zero out the first data page */ | |
601 | if (!err) | |
0bfcfcca | 602 | err = truncate_partial_data_page(inode, from, truncate_page); |
fbfa2cc5 | 603 | |
51dd6249 | 604 | trace_f2fs_truncate_blocks_exit(inode, err); |
fbfa2cc5 JK |
605 | return err; |
606 | } | |
607 | ||
b0154891 | 608 | int f2fs_truncate(struct inode *inode, bool lock) |
fbfa2cc5 | 609 | { |
b0154891 CY |
610 | int err; |
611 | ||
fbfa2cc5 JK |
612 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || |
613 | S_ISLNK(inode->i_mode))) | |
b0154891 | 614 | return 0; |
fbfa2cc5 | 615 | |
51dd6249 NJ |
616 | trace_f2fs_truncate(inode); |
617 | ||
92dffd01 | 618 | /* we should check inline_data size */ |
b9d777b8 | 619 | if (!f2fs_may_inline_data(inode)) { |
b0154891 CY |
620 | err = f2fs_convert_inline_inode(inode); |
621 | if (err) | |
622 | return err; | |
92dffd01 JK |
623 | } |
624 | ||
b0154891 CY |
625 | err = truncate_blocks(inode, i_size_read(inode), lock); |
626 | if (err) | |
627 | return err; | |
628 | ||
629 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
630 | mark_inode_dirty(inode); | |
631 | return 0; | |
fbfa2cc5 JK |
632 | } |
633 | ||
2d4d9fb5 | 634 | int f2fs_getattr(struct vfsmount *mnt, |
fbfa2cc5 JK |
635 | struct dentry *dentry, struct kstat *stat) |
636 | { | |
2b0143b5 | 637 | struct inode *inode = d_inode(dentry); |
fbfa2cc5 JK |
638 | generic_fillattr(inode, stat); |
639 | stat->blocks <<= 3; | |
640 | return 0; | |
641 | } | |
642 | ||
643 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
644 | static void __setattr_copy(struct inode *inode, const struct iattr *attr) | |
645 | { | |
646 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
647 | unsigned int ia_valid = attr->ia_valid; | |
648 | ||
649 | if (ia_valid & ATTR_UID) | |
650 | inode->i_uid = attr->ia_uid; | |
651 | if (ia_valid & ATTR_GID) | |
652 | inode->i_gid = attr->ia_gid; | |
653 | if (ia_valid & ATTR_ATIME) | |
654 | inode->i_atime = timespec_trunc(attr->ia_atime, | |
655 | inode->i_sb->s_time_gran); | |
656 | if (ia_valid & ATTR_MTIME) | |
657 | inode->i_mtime = timespec_trunc(attr->ia_mtime, | |
658 | inode->i_sb->s_time_gran); | |
659 | if (ia_valid & ATTR_CTIME) | |
660 | inode->i_ctime = timespec_trunc(attr->ia_ctime, | |
661 | inode->i_sb->s_time_gran); | |
662 | if (ia_valid & ATTR_MODE) { | |
663 | umode_t mode = attr->ia_mode; | |
664 | ||
665 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
666 | mode &= ~S_ISGID; | |
667 | set_acl_inode(fi, mode); | |
668 | } | |
669 | } | |
670 | #else | |
671 | #define __setattr_copy setattr_copy | |
672 | #endif | |
673 | ||
674 | int f2fs_setattr(struct dentry *dentry, struct iattr *attr) | |
675 | { | |
2b0143b5 | 676 | struct inode *inode = d_inode(dentry); |
fbfa2cc5 JK |
677 | struct f2fs_inode_info *fi = F2FS_I(inode); |
678 | int err; | |
679 | ||
680 | err = inode_change_ok(inode, attr); | |
681 | if (err) | |
682 | return err; | |
683 | ||
09db6a2e | 684 | if (attr->ia_valid & ATTR_SIZE) { |
fcc85a4d | 685 | if (f2fs_encrypted_inode(inode) && |
0b81d077 | 686 | fscrypt_get_encryption_info(inode)) |
fcc85a4d JK |
687 | return -EACCES; |
688 | ||
3c454145 | 689 | if (attr->ia_size <= i_size_read(inode)) { |
09db6a2e | 690 | truncate_setsize(inode, attr->ia_size); |
b0154891 CY |
691 | err = f2fs_truncate(inode, true); |
692 | if (err) | |
693 | return err; | |
2c4db1a6 | 694 | f2fs_balance_fs(F2FS_I_SB(inode), true); |
09db6a2e CY |
695 | } else { |
696 | /* | |
3c454145 CY |
697 | * do not trim all blocks after i_size if target size is |
698 | * larger than i_size. | |
09db6a2e | 699 | */ |
3c454145 | 700 | truncate_setsize(inode, attr->ia_size); |
0cab80ee CY |
701 | |
702 | /* should convert inline inode here */ | |
b9d777b8 | 703 | if (!f2fs_may_inline_data(inode)) { |
0cab80ee CY |
704 | err = f2fs_convert_inline_inode(inode); |
705 | if (err) | |
706 | return err; | |
707 | } | |
345a6b2e | 708 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
09db6a2e | 709 | } |
fbfa2cc5 JK |
710 | } |
711 | ||
712 | __setattr_copy(inode, attr); | |
713 | ||
714 | if (attr->ia_valid & ATTR_MODE) { | |
a6dda0e6 | 715 | err = posix_acl_chmod(inode, get_inode_mode(inode)); |
fbfa2cc5 JK |
716 | if (err || is_inode_flag_set(fi, FI_ACL_MODE)) { |
717 | inode->i_mode = fi->i_acl_mode; | |
718 | clear_inode_flag(fi, FI_ACL_MODE); | |
719 | } | |
720 | } | |
721 | ||
722 | mark_inode_dirty(inode); | |
723 | return err; | |
724 | } | |
725 | ||
726 | const struct inode_operations f2fs_file_inode_operations = { | |
727 | .getattr = f2fs_getattr, | |
728 | .setattr = f2fs_setattr, | |
729 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 730 | .set_acl = f2fs_set_acl, |
fbfa2cc5 JK |
731 | #ifdef CONFIG_F2FS_FS_XATTR |
732 | .setxattr = generic_setxattr, | |
733 | .getxattr = generic_getxattr, | |
734 | .listxattr = f2fs_listxattr, | |
735 | .removexattr = generic_removexattr, | |
736 | #endif | |
9ab70134 | 737 | .fiemap = f2fs_fiemap, |
fbfa2cc5 JK |
738 | }; |
739 | ||
6394328a | 740 | static int fill_zero(struct inode *inode, pgoff_t index, |
fbfa2cc5 JK |
741 | loff_t start, loff_t len) |
742 | { | |
4081363f | 743 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 JK |
744 | struct page *page; |
745 | ||
746 | if (!len) | |
6394328a | 747 | return 0; |
fbfa2cc5 | 748 | |
2c4db1a6 | 749 | f2fs_balance_fs(sbi, true); |
bd43df02 | 750 | |
e479556b | 751 | f2fs_lock_op(sbi); |
64aa7ed9 | 752 | page = get_new_data_page(inode, NULL, index, false); |
e479556b | 753 | f2fs_unlock_op(sbi); |
fbfa2cc5 | 754 | |
6394328a CY |
755 | if (IS_ERR(page)) |
756 | return PTR_ERR(page); | |
757 | ||
fec1d657 | 758 | f2fs_wait_on_page_writeback(page, DATA, true); |
6394328a CY |
759 | zero_user(page, start, len); |
760 | set_page_dirty(page); | |
761 | f2fs_put_page(page, 1); | |
762 | return 0; | |
fbfa2cc5 JK |
763 | } |
764 | ||
765 | int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) | |
766 | { | |
fbfa2cc5 JK |
767 | int err; |
768 | ||
ea58711e | 769 | while (pg_start < pg_end) { |
fbfa2cc5 | 770 | struct dnode_of_data dn; |
ea58711e | 771 | pgoff_t end_offset, count; |
9eaeba70 | 772 | |
fbfa2cc5 | 773 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
ea58711e | 774 | err = get_dnode_of_data(&dn, pg_start, LOOKUP_NODE); |
fbfa2cc5 | 775 | if (err) { |
ea58711e CY |
776 | if (err == -ENOENT) { |
777 | pg_start++; | |
fbfa2cc5 | 778 | continue; |
ea58711e | 779 | } |
fbfa2cc5 JK |
780 | return err; |
781 | } | |
782 | ||
81ca7350 | 783 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
ea58711e CY |
784 | count = min(end_offset - dn.ofs_in_node, pg_end - pg_start); |
785 | ||
786 | f2fs_bug_on(F2FS_I_SB(inode), count == 0 || count > end_offset); | |
787 | ||
788 | truncate_data_blocks_range(&dn, count); | |
fbfa2cc5 | 789 | f2fs_put_dnode(&dn); |
ea58711e CY |
790 | |
791 | pg_start += count; | |
fbfa2cc5 JK |
792 | } |
793 | return 0; | |
794 | } | |
795 | ||
a66c7b2f | 796 | static int punch_hole(struct inode *inode, loff_t offset, loff_t len) |
fbfa2cc5 JK |
797 | { |
798 | pgoff_t pg_start, pg_end; | |
799 | loff_t off_start, off_end; | |
b9d777b8 | 800 | int ret; |
fbfa2cc5 | 801 | |
b9d777b8 JK |
802 | ret = f2fs_convert_inline_inode(inode); |
803 | if (ret) | |
804 | return ret; | |
9ffe0fb5 | 805 | |
09cbfeaf KS |
806 | pg_start = ((unsigned long long) offset) >> PAGE_SHIFT; |
807 | pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT; | |
fbfa2cc5 | 808 | |
09cbfeaf KS |
809 | off_start = offset & (PAGE_SIZE - 1); |
810 | off_end = (offset + len) & (PAGE_SIZE - 1); | |
fbfa2cc5 JK |
811 | |
812 | if (pg_start == pg_end) { | |
6394328a | 813 | ret = fill_zero(inode, pg_start, off_start, |
fbfa2cc5 | 814 | off_end - off_start); |
6394328a CY |
815 | if (ret) |
816 | return ret; | |
fbfa2cc5 | 817 | } else { |
6394328a CY |
818 | if (off_start) { |
819 | ret = fill_zero(inode, pg_start++, off_start, | |
09cbfeaf | 820 | PAGE_SIZE - off_start); |
6394328a CY |
821 | if (ret) |
822 | return ret; | |
823 | } | |
824 | if (off_end) { | |
825 | ret = fill_zero(inode, pg_end, 0, off_end); | |
826 | if (ret) | |
827 | return ret; | |
828 | } | |
fbfa2cc5 JK |
829 | |
830 | if (pg_start < pg_end) { | |
831 | struct address_space *mapping = inode->i_mapping; | |
832 | loff_t blk_start, blk_end; | |
4081363f | 833 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
1127a3d4 | 834 | |
2c4db1a6 | 835 | f2fs_balance_fs(sbi, true); |
fbfa2cc5 | 836 | |
09cbfeaf KS |
837 | blk_start = (loff_t)pg_start << PAGE_SHIFT; |
838 | blk_end = (loff_t)pg_end << PAGE_SHIFT; | |
fbfa2cc5 JK |
839 | truncate_inode_pages_range(mapping, blk_start, |
840 | blk_end - 1); | |
39936837 | 841 | |
e479556b | 842 | f2fs_lock_op(sbi); |
fbfa2cc5 | 843 | ret = truncate_hole(inode, pg_start, pg_end); |
e479556b | 844 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
845 | } |
846 | } | |
847 | ||
fbfa2cc5 JK |
848 | return ret; |
849 | } | |
850 | ||
6e2c64ad JK |
851 | static int __exchange_data_block(struct inode *inode, pgoff_t src, |
852 | pgoff_t dst, bool full) | |
b4ace337 CY |
853 | { |
854 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
855 | struct dnode_of_data dn; | |
6e2c64ad JK |
856 | block_t new_addr; |
857 | bool do_replace = false; | |
858 | int ret; | |
ecbaa406 | 859 | |
6e2c64ad JK |
860 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
861 | ret = get_dnode_of_data(&dn, src, LOOKUP_NODE_RA); | |
862 | if (ret && ret != -ENOENT) { | |
863 | return ret; | |
864 | } else if (ret == -ENOENT) { | |
865 | new_addr = NULL_ADDR; | |
866 | } else { | |
867 | new_addr = dn.data_blkaddr; | |
868 | if (!is_checkpointed_data(sbi, new_addr)) { | |
6e2c64ad | 869 | /* do not invalidate this block address */ |
f28b3434 | 870 | f2fs_update_data_blkaddr(&dn, NULL_ADDR); |
6e2c64ad | 871 | do_replace = true; |
b4ace337 | 872 | } |
6e2c64ad JK |
873 | f2fs_put_dnode(&dn); |
874 | } | |
b4ace337 | 875 | |
6e2c64ad JK |
876 | if (new_addr == NULL_ADDR) |
877 | return full ? truncate_hole(inode, dst, dst + 1) : 0; | |
b4ace337 | 878 | |
6e2c64ad JK |
879 | if (do_replace) { |
880 | struct page *ipage = get_node_page(sbi, inode->i_ino); | |
881 | struct node_info ni; | |
b4ace337 | 882 | |
6e2c64ad JK |
883 | if (IS_ERR(ipage)) { |
884 | ret = PTR_ERR(ipage); | |
885 | goto err_out; | |
886 | } | |
b4ace337 | 887 | |
6e2c64ad JK |
888 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
889 | ret = f2fs_reserve_block(&dn, dst); | |
890 | if (ret) | |
891 | goto err_out; | |
b4ace337 | 892 | |
6e2c64ad | 893 | truncate_data_blocks_range(&dn, 1); |
b4ace337 | 894 | |
6e2c64ad JK |
895 | get_node_info(sbi, dn.nid, &ni); |
896 | f2fs_replace_block(sbi, &dn, dn.data_blkaddr, new_addr, | |
28bc106b | 897 | ni.version, true, false); |
6e2c64ad JK |
898 | f2fs_put_dnode(&dn); |
899 | } else { | |
900 | struct page *psrc, *pdst; | |
901 | ||
a56c7c6f | 902 | psrc = get_lock_data_page(inode, src, true); |
6e2c64ad JK |
903 | if (IS_ERR(psrc)) |
904 | return PTR_ERR(psrc); | |
8ef2af45 | 905 | pdst = get_new_data_page(inode, NULL, dst, true); |
6e2c64ad JK |
906 | if (IS_ERR(pdst)) { |
907 | f2fs_put_page(psrc, 1); | |
908 | return PTR_ERR(pdst); | |
909 | } | |
910 | f2fs_copy_page(psrc, pdst); | |
911 | set_page_dirty(pdst); | |
912 | f2fs_put_page(pdst, 1); | |
913 | f2fs_put_page(psrc, 1); | |
b4ace337 | 914 | |
6e2c64ad JK |
915 | return truncate_hole(inode, src, src + 1); |
916 | } | |
917 | return 0; | |
b4ace337 | 918 | |
6e2c64ad JK |
919 | err_out: |
920 | if (!get_dnode_of_data(&dn, src, LOOKUP_NODE)) { | |
f28b3434 | 921 | f2fs_update_data_blkaddr(&dn, new_addr); |
6e2c64ad JK |
922 | f2fs_put_dnode(&dn); |
923 | } | |
924 | return ret; | |
925 | } | |
b4ace337 | 926 | |
6e2c64ad JK |
927 | static int f2fs_do_collapse(struct inode *inode, pgoff_t start, pgoff_t end) |
928 | { | |
929 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
930 | pgoff_t nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE; | |
931 | int ret = 0; | |
932 | ||
933 | for (; end < nrpages; start++, end++) { | |
2c4db1a6 | 934 | f2fs_balance_fs(sbi, true); |
6e2c64ad JK |
935 | f2fs_lock_op(sbi); |
936 | ret = __exchange_data_block(inode, end, start, true); | |
ecbaa406 | 937 | f2fs_unlock_op(sbi); |
6e2c64ad JK |
938 | if (ret) |
939 | break; | |
b4ace337 | 940 | } |
b4ace337 CY |
941 | return ret; |
942 | } | |
943 | ||
944 | static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len) | |
945 | { | |
946 | pgoff_t pg_start, pg_end; | |
947 | loff_t new_size; | |
948 | int ret; | |
949 | ||
b4ace337 CY |
950 | if (offset + len >= i_size_read(inode)) |
951 | return -EINVAL; | |
952 | ||
953 | /* collapse range should be aligned to block size of f2fs. */ | |
954 | if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1)) | |
955 | return -EINVAL; | |
956 | ||
b9d777b8 JK |
957 | ret = f2fs_convert_inline_inode(inode); |
958 | if (ret) | |
959 | return ret; | |
97a7b2c2 | 960 | |
09cbfeaf KS |
961 | pg_start = offset >> PAGE_SHIFT; |
962 | pg_end = (offset + len) >> PAGE_SHIFT; | |
b4ace337 CY |
963 | |
964 | /* write out all dirty pages from offset */ | |
965 | ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); | |
966 | if (ret) | |
967 | return ret; | |
968 | ||
969 | truncate_pagecache(inode, offset); | |
970 | ||
971 | ret = f2fs_do_collapse(inode, pg_start, pg_end); | |
972 | if (ret) | |
973 | return ret; | |
974 | ||
6e2c64ad JK |
975 | /* write out all moved pages, if possible */ |
976 | filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); | |
977 | truncate_pagecache(inode, offset); | |
978 | ||
b4ace337 | 979 | new_size = i_size_read(inode) - len; |
6e2c64ad | 980 | truncate_pagecache(inode, new_size); |
b4ace337 CY |
981 | |
982 | ret = truncate_blocks(inode, new_size, true); | |
983 | if (!ret) | |
984 | i_size_write(inode, new_size); | |
985 | ||
986 | return ret; | |
987 | } | |
988 | ||
75cd4e09 CY |
989 | static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len, |
990 | int mode) | |
991 | { | |
992 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
993 | struct address_space *mapping = inode->i_mapping; | |
994 | pgoff_t index, pg_start, pg_end; | |
995 | loff_t new_size = i_size_read(inode); | |
996 | loff_t off_start, off_end; | |
997 | int ret = 0; | |
998 | ||
75cd4e09 CY |
999 | ret = inode_newsize_ok(inode, (len + offset)); |
1000 | if (ret) | |
1001 | return ret; | |
1002 | ||
b9d777b8 JK |
1003 | ret = f2fs_convert_inline_inode(inode); |
1004 | if (ret) | |
1005 | return ret; | |
75cd4e09 CY |
1006 | |
1007 | ret = filemap_write_and_wait_range(mapping, offset, offset + len - 1); | |
1008 | if (ret) | |
1009 | return ret; | |
1010 | ||
1011 | truncate_pagecache_range(inode, offset, offset + len - 1); | |
1012 | ||
09cbfeaf KS |
1013 | pg_start = ((unsigned long long) offset) >> PAGE_SHIFT; |
1014 | pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT; | |
75cd4e09 | 1015 | |
09cbfeaf KS |
1016 | off_start = offset & (PAGE_SIZE - 1); |
1017 | off_end = (offset + len) & (PAGE_SIZE - 1); | |
75cd4e09 CY |
1018 | |
1019 | if (pg_start == pg_end) { | |
6394328a CY |
1020 | ret = fill_zero(inode, pg_start, off_start, |
1021 | off_end - off_start); | |
1022 | if (ret) | |
1023 | return ret; | |
1024 | ||
75cd4e09 CY |
1025 | if (offset + len > new_size) |
1026 | new_size = offset + len; | |
1027 | new_size = max_t(loff_t, new_size, offset + len); | |
1028 | } else { | |
1029 | if (off_start) { | |
6394328a | 1030 | ret = fill_zero(inode, pg_start++, off_start, |
09cbfeaf | 1031 | PAGE_SIZE - off_start); |
6394328a CY |
1032 | if (ret) |
1033 | return ret; | |
1034 | ||
75cd4e09 | 1035 | new_size = max_t(loff_t, new_size, |
09cbfeaf | 1036 | (loff_t)pg_start << PAGE_SHIFT); |
75cd4e09 CY |
1037 | } |
1038 | ||
1039 | for (index = pg_start; index < pg_end; index++) { | |
1040 | struct dnode_of_data dn; | |
1041 | struct page *ipage; | |
1042 | ||
1043 | f2fs_lock_op(sbi); | |
1044 | ||
1045 | ipage = get_node_page(sbi, inode->i_ino); | |
1046 | if (IS_ERR(ipage)) { | |
1047 | ret = PTR_ERR(ipage); | |
1048 | f2fs_unlock_op(sbi); | |
1049 | goto out; | |
1050 | } | |
1051 | ||
1052 | set_new_dnode(&dn, inode, ipage, NULL, 0); | |
1053 | ret = f2fs_reserve_block(&dn, index); | |
1054 | if (ret) { | |
1055 | f2fs_unlock_op(sbi); | |
1056 | goto out; | |
1057 | } | |
1058 | ||
1059 | if (dn.data_blkaddr != NEW_ADDR) { | |
1060 | invalidate_blocks(sbi, dn.data_blkaddr); | |
f28b3434 | 1061 | f2fs_update_data_blkaddr(&dn, NEW_ADDR); |
75cd4e09 CY |
1062 | } |
1063 | f2fs_put_dnode(&dn); | |
1064 | f2fs_unlock_op(sbi); | |
1065 | ||
1066 | new_size = max_t(loff_t, new_size, | |
09cbfeaf | 1067 | (loff_t)(index + 1) << PAGE_SHIFT); |
75cd4e09 CY |
1068 | } |
1069 | ||
1070 | if (off_end) { | |
6394328a CY |
1071 | ret = fill_zero(inode, pg_end, 0, off_end); |
1072 | if (ret) | |
1073 | goto out; | |
1074 | ||
75cd4e09 CY |
1075 | new_size = max_t(loff_t, new_size, offset + len); |
1076 | } | |
1077 | } | |
1078 | ||
1079 | out: | |
1080 | if (!(mode & FALLOC_FL_KEEP_SIZE) && i_size_read(inode) < new_size) { | |
1081 | i_size_write(inode, new_size); | |
1082 | mark_inode_dirty(inode); | |
1083 | update_inode_page(inode); | |
1084 | } | |
1085 | ||
1086 | return ret; | |
1087 | } | |
1088 | ||
f62185d0 CY |
1089 | static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len) |
1090 | { | |
1091 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1092 | pgoff_t pg_start, pg_end, delta, nrpages, idx; | |
1093 | loff_t new_size; | |
6e2c64ad | 1094 | int ret = 0; |
f62185d0 | 1095 | |
f62185d0 CY |
1096 | new_size = i_size_read(inode) + len; |
1097 | if (new_size > inode->i_sb->s_maxbytes) | |
1098 | return -EFBIG; | |
1099 | ||
1100 | if (offset >= i_size_read(inode)) | |
1101 | return -EINVAL; | |
1102 | ||
1103 | /* insert range should be aligned to block size of f2fs. */ | |
1104 | if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1)) | |
1105 | return -EINVAL; | |
1106 | ||
b9d777b8 JK |
1107 | ret = f2fs_convert_inline_inode(inode); |
1108 | if (ret) | |
1109 | return ret; | |
97a7b2c2 | 1110 | |
2c4db1a6 | 1111 | f2fs_balance_fs(sbi, true); |
2a340760 | 1112 | |
f62185d0 CY |
1113 | ret = truncate_blocks(inode, i_size_read(inode), true); |
1114 | if (ret) | |
1115 | return ret; | |
1116 | ||
1117 | /* write out all dirty pages from offset */ | |
1118 | ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); | |
1119 | if (ret) | |
1120 | return ret; | |
1121 | ||
1122 | truncate_pagecache(inode, offset); | |
1123 | ||
09cbfeaf KS |
1124 | pg_start = offset >> PAGE_SHIFT; |
1125 | pg_end = (offset + len) >> PAGE_SHIFT; | |
f62185d0 CY |
1126 | delta = pg_end - pg_start; |
1127 | nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE; | |
1128 | ||
1129 | for (idx = nrpages - 1; idx >= pg_start && idx != -1; idx--) { | |
f62185d0 | 1130 | f2fs_lock_op(sbi); |
6e2c64ad | 1131 | ret = __exchange_data_block(inode, idx, idx + delta, false); |
f62185d0 | 1132 | f2fs_unlock_op(sbi); |
6e2c64ad JK |
1133 | if (ret) |
1134 | break; | |
f62185d0 CY |
1135 | } |
1136 | ||
6e2c64ad JK |
1137 | /* write out all moved pages, if possible */ |
1138 | filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); | |
1139 | truncate_pagecache(inode, offset); | |
1140 | ||
1141 | if (!ret) | |
1142 | i_size_write(inode, new_size); | |
f62185d0 CY |
1143 | return ret; |
1144 | } | |
1145 | ||
fbfa2cc5 JK |
1146 | static int expand_inode_data(struct inode *inode, loff_t offset, |
1147 | loff_t len, int mode) | |
1148 | { | |
4081363f | 1149 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
fbfa2cc5 JK |
1150 | pgoff_t index, pg_start, pg_end; |
1151 | loff_t new_size = i_size_read(inode); | |
1152 | loff_t off_start, off_end; | |
1153 | int ret = 0; | |
1154 | ||
1155 | ret = inode_newsize_ok(inode, (len + offset)); | |
1156 | if (ret) | |
1157 | return ret; | |
1158 | ||
b9d777b8 JK |
1159 | ret = f2fs_convert_inline_inode(inode); |
1160 | if (ret) | |
1161 | return ret; | |
9e09fc85 | 1162 | |
2c4db1a6 | 1163 | f2fs_balance_fs(sbi, true); |
2a340760 | 1164 | |
09cbfeaf KS |
1165 | pg_start = ((unsigned long long) offset) >> PAGE_SHIFT; |
1166 | pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT; | |
fbfa2cc5 | 1167 | |
09cbfeaf KS |
1168 | off_start = offset & (PAGE_SIZE - 1); |
1169 | off_end = (offset + len) & (PAGE_SIZE - 1); | |
fbfa2cc5 | 1170 | |
ead43275 JK |
1171 | f2fs_lock_op(sbi); |
1172 | ||
fbfa2cc5 JK |
1173 | for (index = pg_start; index <= pg_end; index++) { |
1174 | struct dnode_of_data dn; | |
1175 | ||
98397ff3 JK |
1176 | if (index == pg_end && !off_end) |
1177 | goto noalloc; | |
1178 | ||
fbfa2cc5 | 1179 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
b600965c | 1180 | ret = f2fs_reserve_block(&dn, index); |
b600965c | 1181 | if (ret) |
fbfa2cc5 | 1182 | break; |
98397ff3 | 1183 | noalloc: |
fbfa2cc5 JK |
1184 | if (pg_start == pg_end) |
1185 | new_size = offset + len; | |
1186 | else if (index == pg_start && off_start) | |
09cbfeaf | 1187 | new_size = (loff_t)(index + 1) << PAGE_SHIFT; |
fbfa2cc5 | 1188 | else if (index == pg_end) |
09cbfeaf | 1189 | new_size = ((loff_t)index << PAGE_SHIFT) + |
9edcdabf | 1190 | off_end; |
fbfa2cc5 | 1191 | else |
09cbfeaf | 1192 | new_size += PAGE_SIZE; |
fbfa2cc5 JK |
1193 | } |
1194 | ||
1195 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
1196 | i_size_read(inode) < new_size) { | |
1197 | i_size_write(inode, new_size); | |
1198 | mark_inode_dirty(inode); | |
ead43275 | 1199 | update_inode_page(inode); |
fbfa2cc5 | 1200 | } |
ead43275 | 1201 | f2fs_unlock_op(sbi); |
fbfa2cc5 JK |
1202 | |
1203 | return ret; | |
1204 | } | |
1205 | ||
1206 | static long f2fs_fallocate(struct file *file, int mode, | |
1207 | loff_t offset, loff_t len) | |
1208 | { | |
6131ffaa | 1209 | struct inode *inode = file_inode(file); |
587c0a42 | 1210 | long ret = 0; |
fbfa2cc5 | 1211 | |
c998012b CY |
1212 | /* f2fs only support ->fallocate for regular file */ |
1213 | if (!S_ISREG(inode->i_mode)) | |
1214 | return -EINVAL; | |
1215 | ||
f62185d0 CY |
1216 | if (f2fs_encrypted_inode(inode) && |
1217 | (mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE))) | |
fcc85a4d JK |
1218 | return -EOPNOTSUPP; |
1219 | ||
b4ace337 | 1220 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE | |
f62185d0 CY |
1221 | FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE | |
1222 | FALLOC_FL_INSERT_RANGE)) | |
fbfa2cc5 JK |
1223 | return -EOPNOTSUPP; |
1224 | ||
5955102c | 1225 | inode_lock(inode); |
3375f696 | 1226 | |
587c0a42 TY |
1227 | if (mode & FALLOC_FL_PUNCH_HOLE) { |
1228 | if (offset >= inode->i_size) | |
1229 | goto out; | |
1230 | ||
a66c7b2f | 1231 | ret = punch_hole(inode, offset, len); |
b4ace337 CY |
1232 | } else if (mode & FALLOC_FL_COLLAPSE_RANGE) { |
1233 | ret = f2fs_collapse_range(inode, offset, len); | |
75cd4e09 CY |
1234 | } else if (mode & FALLOC_FL_ZERO_RANGE) { |
1235 | ret = f2fs_zero_range(inode, offset, len, mode); | |
f62185d0 CY |
1236 | } else if (mode & FALLOC_FL_INSERT_RANGE) { |
1237 | ret = f2fs_insert_range(inode, offset, len); | |
b4ace337 | 1238 | } else { |
fbfa2cc5 | 1239 | ret = expand_inode_data(inode, offset, len, mode); |
b4ace337 | 1240 | } |
fbfa2cc5 | 1241 | |
3af60a49 NJ |
1242 | if (!ret) { |
1243 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
1244 | mark_inode_dirty(inode); | |
d0239e1b | 1245 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
3af60a49 | 1246 | } |
3375f696 | 1247 | |
587c0a42 | 1248 | out: |
5955102c | 1249 | inode_unlock(inode); |
3375f696 | 1250 | |
c01e2853 | 1251 | trace_f2fs_fallocate(inode, mode, offset, len, ret); |
fbfa2cc5 JK |
1252 | return ret; |
1253 | } | |
1254 | ||
1e84371f JK |
1255 | static int f2fs_release_file(struct inode *inode, struct file *filp) |
1256 | { | |
1257 | /* some remained atomic pages should discarded */ | |
1258 | if (f2fs_is_atomic_file(inode)) | |
29b96b54 | 1259 | drop_inmem_pages(inode); |
1e84371f JK |
1260 | if (f2fs_is_volatile_file(inode)) { |
1261 | set_inode_flag(F2FS_I(inode), FI_DROP_CACHE); | |
1262 | filemap_fdatawrite(inode->i_mapping); | |
1263 | clear_inode_flag(F2FS_I(inode), FI_DROP_CACHE); | |
1264 | } | |
1265 | return 0; | |
1266 | } | |
1267 | ||
fbfa2cc5 JK |
1268 | #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL)) |
1269 | #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL) | |
1270 | ||
1271 | static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags) | |
1272 | { | |
1273 | if (S_ISDIR(mode)) | |
1274 | return flags; | |
1275 | else if (S_ISREG(mode)) | |
1276 | return flags & F2FS_REG_FLMASK; | |
1277 | else | |
1278 | return flags & F2FS_OTHER_FLMASK; | |
1279 | } | |
1280 | ||
52656e6c | 1281 | static int f2fs_ioc_getflags(struct file *filp, unsigned long arg) |
fbfa2cc5 | 1282 | { |
6131ffaa | 1283 | struct inode *inode = file_inode(filp); |
fbfa2cc5 | 1284 | struct f2fs_inode_info *fi = F2FS_I(inode); |
52656e6c JK |
1285 | unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE; |
1286 | return put_user(flags, (int __user *)arg); | |
1287 | } | |
fbfa2cc5 | 1288 | |
52656e6c JK |
1289 | static int f2fs_ioc_setflags(struct file *filp, unsigned long arg) |
1290 | { | |
1291 | struct inode *inode = file_inode(filp); | |
1292 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
1293 | unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE; | |
1294 | unsigned int oldflags; | |
1295 | int ret; | |
fbfa2cc5 | 1296 | |
52656e6c JK |
1297 | ret = mnt_want_write_file(filp); |
1298 | if (ret) | |
1299 | return ret; | |
fbfa2cc5 | 1300 | |
52656e6c JK |
1301 | if (!inode_owner_or_capable(inode)) { |
1302 | ret = -EACCES; | |
1303 | goto out; | |
1304 | } | |
fbfa2cc5 | 1305 | |
52656e6c JK |
1306 | if (get_user(flags, (int __user *)arg)) { |
1307 | ret = -EFAULT; | |
1308 | goto out; | |
1309 | } | |
fbfa2cc5 | 1310 | |
52656e6c | 1311 | flags = f2fs_mask_flags(inode->i_mode, flags); |
fbfa2cc5 | 1312 | |
5955102c | 1313 | inode_lock(inode); |
fbfa2cc5 | 1314 | |
52656e6c | 1315 | oldflags = fi->i_flags; |
fbfa2cc5 | 1316 | |
52656e6c JK |
1317 | if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { |
1318 | if (!capable(CAP_LINUX_IMMUTABLE)) { | |
5955102c | 1319 | inode_unlock(inode); |
52656e6c JK |
1320 | ret = -EPERM; |
1321 | goto out; | |
fbfa2cc5 | 1322 | } |
52656e6c | 1323 | } |
fbfa2cc5 | 1324 | |
52656e6c JK |
1325 | flags = flags & FS_FL_USER_MODIFIABLE; |
1326 | flags |= oldflags & ~FS_FL_USER_MODIFIABLE; | |
1327 | fi->i_flags = flags; | |
5955102c | 1328 | inode_unlock(inode); |
fbfa2cc5 | 1329 | |
52656e6c JK |
1330 | f2fs_set_inode_flags(inode); |
1331 | inode->i_ctime = CURRENT_TIME; | |
1332 | mark_inode_dirty(inode); | |
fbfa2cc5 | 1333 | out: |
52656e6c JK |
1334 | mnt_drop_write_file(filp); |
1335 | return ret; | |
1336 | } | |
4b2fecc8 | 1337 | |
d49f3e89 CY |
1338 | static int f2fs_ioc_getversion(struct file *filp, unsigned long arg) |
1339 | { | |
1340 | struct inode *inode = file_inode(filp); | |
1341 | ||
1342 | return put_user(inode->i_generation, (int __user *)arg); | |
1343 | } | |
1344 | ||
88b88a66 JK |
1345 | static int f2fs_ioc_start_atomic_write(struct file *filp) |
1346 | { | |
1347 | struct inode *inode = file_inode(filp); | |
f4c9c743 | 1348 | int ret; |
88b88a66 JK |
1349 | |
1350 | if (!inode_owner_or_capable(inode)) | |
1351 | return -EACCES; | |
1352 | ||
1e84371f JK |
1353 | if (f2fs_is_atomic_file(inode)) |
1354 | return 0; | |
88b88a66 | 1355 | |
f4c9c743 CY |
1356 | ret = f2fs_convert_inline_inode(inode); |
1357 | if (ret) | |
1358 | return ret; | |
88b88a66 | 1359 | |
f4c9c743 | 1360 | set_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); |
d0239e1b JK |
1361 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
1362 | ||
f4c9c743 | 1363 | return 0; |
88b88a66 JK |
1364 | } |
1365 | ||
1366 | static int f2fs_ioc_commit_atomic_write(struct file *filp) | |
1367 | { | |
1368 | struct inode *inode = file_inode(filp); | |
1369 | int ret; | |
1370 | ||
1371 | if (!inode_owner_or_capable(inode)) | |
1372 | return -EACCES; | |
1373 | ||
02a1335f JK |
1374 | if (f2fs_is_volatile_file(inode)) |
1375 | return 0; | |
1376 | ||
88b88a66 JK |
1377 | ret = mnt_want_write_file(filp); |
1378 | if (ret) | |
1379 | return ret; | |
1380 | ||
6282adbf JK |
1381 | if (f2fs_is_atomic_file(inode)) { |
1382 | clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); | |
29b96b54 | 1383 | ret = commit_inmem_pages(inode); |
447135a8 JK |
1384 | if (ret) { |
1385 | set_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); | |
edb27dee | 1386 | goto err_out; |
447135a8 | 1387 | } |
6282adbf | 1388 | } |
88b88a66 | 1389 | |
a5f64b6a | 1390 | ret = f2fs_sync_file(filp, 0, LLONG_MAX, 0); |
edb27dee | 1391 | err_out: |
88b88a66 JK |
1392 | mnt_drop_write_file(filp); |
1393 | return ret; | |
1394 | } | |
1395 | ||
02a1335f JK |
1396 | static int f2fs_ioc_start_volatile_write(struct file *filp) |
1397 | { | |
1398 | struct inode *inode = file_inode(filp); | |
f4c9c743 | 1399 | int ret; |
02a1335f JK |
1400 | |
1401 | if (!inode_owner_or_capable(inode)) | |
1402 | return -EACCES; | |
1403 | ||
1e84371f JK |
1404 | if (f2fs_is_volatile_file(inode)) |
1405 | return 0; | |
1406 | ||
f4c9c743 CY |
1407 | ret = f2fs_convert_inline_inode(inode); |
1408 | if (ret) | |
1409 | return ret; | |
b3d208f9 | 1410 | |
f4c9c743 | 1411 | set_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE); |
d0239e1b | 1412 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
f4c9c743 | 1413 | return 0; |
02a1335f JK |
1414 | } |
1415 | ||
1e84371f JK |
1416 | static int f2fs_ioc_release_volatile_write(struct file *filp) |
1417 | { | |
1418 | struct inode *inode = file_inode(filp); | |
1419 | ||
1420 | if (!inode_owner_or_capable(inode)) | |
1421 | return -EACCES; | |
1422 | ||
1423 | if (!f2fs_is_volatile_file(inode)) | |
1424 | return 0; | |
1425 | ||
3c6c2beb JK |
1426 | if (!f2fs_is_first_block_written(inode)) |
1427 | return truncate_partial_data_page(inode, 0, true); | |
1428 | ||
538e17e7 | 1429 | return punch_hole(inode, 0, F2FS_BLKSIZE); |
1e84371f JK |
1430 | } |
1431 | ||
1432 | static int f2fs_ioc_abort_volatile_write(struct file *filp) | |
1433 | { | |
1434 | struct inode *inode = file_inode(filp); | |
1435 | int ret; | |
1436 | ||
1437 | if (!inode_owner_or_capable(inode)) | |
1438 | return -EACCES; | |
1439 | ||
1440 | ret = mnt_want_write_file(filp); | |
1441 | if (ret) | |
1442 | return ret; | |
1443 | ||
732d5648 JK |
1444 | if (f2fs_is_atomic_file(inode)) { |
1445 | clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); | |
29b96b54 | 1446 | drop_inmem_pages(inode); |
732d5648 JK |
1447 | } |
1448 | if (f2fs_is_volatile_file(inode)) { | |
1449 | clear_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE); | |
1450 | ret = f2fs_sync_file(filp, 0, LLONG_MAX, 0); | |
1451 | } | |
de6a8ec9 | 1452 | |
1e84371f | 1453 | mnt_drop_write_file(filp); |
d0239e1b | 1454 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
1e84371f JK |
1455 | return ret; |
1456 | } | |
1457 | ||
1abff93d JK |
1458 | static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg) |
1459 | { | |
1460 | struct inode *inode = file_inode(filp); | |
1461 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1462 | struct super_block *sb = sbi->sb; | |
1463 | __u32 in; | |
1464 | ||
1465 | if (!capable(CAP_SYS_ADMIN)) | |
1466 | return -EPERM; | |
1467 | ||
1468 | if (get_user(in, (__u32 __user *)arg)) | |
1469 | return -EFAULT; | |
1470 | ||
1471 | switch (in) { | |
1472 | case F2FS_GOING_DOWN_FULLSYNC: | |
1473 | sb = freeze_bdev(sb->s_bdev); | |
1474 | if (sb && !IS_ERR(sb)) { | |
1475 | f2fs_stop_checkpoint(sbi); | |
1476 | thaw_bdev(sb->s_bdev, sb); | |
1477 | } | |
1478 | break; | |
1479 | case F2FS_GOING_DOWN_METASYNC: | |
1480 | /* do checkpoint only */ | |
1481 | f2fs_sync_fs(sb, 1); | |
1482 | f2fs_stop_checkpoint(sbi); | |
1483 | break; | |
1484 | case F2FS_GOING_DOWN_NOSYNC: | |
1485 | f2fs_stop_checkpoint(sbi); | |
1486 | break; | |
c912a829 JK |
1487 | case F2FS_GOING_DOWN_METAFLUSH: |
1488 | sync_meta_pages(sbi, META, LONG_MAX); | |
1489 | f2fs_stop_checkpoint(sbi); | |
1490 | break; | |
1abff93d JK |
1491 | default: |
1492 | return -EINVAL; | |
1493 | } | |
d0239e1b | 1494 | f2fs_update_time(sbi, REQ_TIME); |
1abff93d JK |
1495 | return 0; |
1496 | } | |
1497 | ||
52656e6c JK |
1498 | static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg) |
1499 | { | |
1500 | struct inode *inode = file_inode(filp); | |
1501 | struct super_block *sb = inode->i_sb; | |
1502 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
1503 | struct fstrim_range range; | |
1504 | int ret; | |
4b2fecc8 | 1505 | |
52656e6c JK |
1506 | if (!capable(CAP_SYS_ADMIN)) |
1507 | return -EPERM; | |
4b2fecc8 | 1508 | |
52656e6c JK |
1509 | if (!blk_queue_discard(q)) |
1510 | return -EOPNOTSUPP; | |
4b2fecc8 | 1511 | |
52656e6c JK |
1512 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
1513 | sizeof(range))) | |
1514 | return -EFAULT; | |
4b2fecc8 | 1515 | |
52656e6c JK |
1516 | range.minlen = max((unsigned int)range.minlen, |
1517 | q->limits.discard_granularity); | |
1518 | ret = f2fs_trim_fs(F2FS_SB(sb), &range); | |
1519 | if (ret < 0) | |
1520 | return ret; | |
4b2fecc8 | 1521 | |
52656e6c JK |
1522 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
1523 | sizeof(range))) | |
1524 | return -EFAULT; | |
d0239e1b | 1525 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
52656e6c JK |
1526 | return 0; |
1527 | } | |
1528 | ||
f424f664 JK |
1529 | static bool uuid_is_nonzero(__u8 u[16]) |
1530 | { | |
1531 | int i; | |
1532 | ||
1533 | for (i = 0; i < 16; i++) | |
1534 | if (u[i]) | |
1535 | return true; | |
1536 | return false; | |
1537 | } | |
1538 | ||
1539 | static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg) | |
1540 | { | |
0b81d077 | 1541 | struct fscrypt_policy policy; |
f424f664 JK |
1542 | struct inode *inode = file_inode(filp); |
1543 | ||
0b81d077 JK |
1544 | if (copy_from_user(&policy, (struct fscrypt_policy __user *)arg, |
1545 | sizeof(policy))) | |
f424f664 JK |
1546 | return -EFAULT; |
1547 | ||
d0239e1b | 1548 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
0b81d077 | 1549 | return fscrypt_process_policy(inode, &policy); |
f424f664 JK |
1550 | } |
1551 | ||
1552 | static int f2fs_ioc_get_encryption_policy(struct file *filp, unsigned long arg) | |
1553 | { | |
0b81d077 | 1554 | struct fscrypt_policy policy; |
f424f664 JK |
1555 | struct inode *inode = file_inode(filp); |
1556 | int err; | |
1557 | ||
0b81d077 | 1558 | err = fscrypt_get_policy(inode, &policy); |
f424f664 JK |
1559 | if (err) |
1560 | return err; | |
1561 | ||
0b81d077 | 1562 | if (copy_to_user((struct fscrypt_policy __user *)arg, &policy, sizeof(policy))) |
f424f664 JK |
1563 | return -EFAULT; |
1564 | return 0; | |
f424f664 JK |
1565 | } |
1566 | ||
1567 | static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg) | |
1568 | { | |
1569 | struct inode *inode = file_inode(filp); | |
1570 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1571 | int err; | |
1572 | ||
1573 | if (!f2fs_sb_has_crypto(inode->i_sb)) | |
1574 | return -EOPNOTSUPP; | |
1575 | ||
1576 | if (uuid_is_nonzero(sbi->raw_super->encrypt_pw_salt)) | |
1577 | goto got_it; | |
1578 | ||
1579 | err = mnt_want_write_file(filp); | |
1580 | if (err) | |
1581 | return err; | |
1582 | ||
1583 | /* update superblock with uuid */ | |
1584 | generate_random_uuid(sbi->raw_super->encrypt_pw_salt); | |
1585 | ||
c5bda1c8 | 1586 | err = f2fs_commit_super(sbi, false); |
f424f664 JK |
1587 | if (err) { |
1588 | /* undo new data */ | |
1589 | memset(sbi->raw_super->encrypt_pw_salt, 0, 16); | |
e8240f65 | 1590 | mnt_drop_write_file(filp); |
f424f664 JK |
1591 | return err; |
1592 | } | |
e8240f65 | 1593 | mnt_drop_write_file(filp); |
f424f664 JK |
1594 | got_it: |
1595 | if (copy_to_user((__u8 __user *)arg, sbi->raw_super->encrypt_pw_salt, | |
1596 | 16)) | |
1597 | return -EFAULT; | |
1598 | return 0; | |
1599 | } | |
1600 | ||
c1c1b583 CY |
1601 | static int f2fs_ioc_gc(struct file *filp, unsigned long arg) |
1602 | { | |
1603 | struct inode *inode = file_inode(filp); | |
1604 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
d530d4d8 | 1605 | __u32 sync; |
c1c1b583 CY |
1606 | |
1607 | if (!capable(CAP_SYS_ADMIN)) | |
1608 | return -EPERM; | |
1609 | ||
d530d4d8 | 1610 | if (get_user(sync, (__u32 __user *)arg)) |
c1c1b583 CY |
1611 | return -EFAULT; |
1612 | ||
d530d4d8 CY |
1613 | if (f2fs_readonly(sbi->sb)) |
1614 | return -EROFS; | |
c1c1b583 | 1615 | |
d530d4d8 | 1616 | if (!sync) { |
c1c1b583 | 1617 | if (!mutex_trylock(&sbi->gc_mutex)) |
d530d4d8 CY |
1618 | return -EBUSY; |
1619 | } else { | |
1620 | mutex_lock(&sbi->gc_mutex); | |
c1c1b583 CY |
1621 | } |
1622 | ||
d530d4d8 | 1623 | return f2fs_gc(sbi, sync); |
c1c1b583 CY |
1624 | } |
1625 | ||
456b88e4 CY |
1626 | static int f2fs_ioc_write_checkpoint(struct file *filp, unsigned long arg) |
1627 | { | |
1628 | struct inode *inode = file_inode(filp); | |
1629 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
456b88e4 CY |
1630 | |
1631 | if (!capable(CAP_SYS_ADMIN)) | |
1632 | return -EPERM; | |
1633 | ||
1634 | if (f2fs_readonly(sbi->sb)) | |
1635 | return -EROFS; | |
1636 | ||
e96248bb | 1637 | return f2fs_sync_fs(sbi->sb, 1); |
456b88e4 CY |
1638 | } |
1639 | ||
d323d005 CY |
1640 | static int f2fs_defragment_range(struct f2fs_sb_info *sbi, |
1641 | struct file *filp, | |
1642 | struct f2fs_defragment *range) | |
1643 | { | |
1644 | struct inode *inode = file_inode(filp); | |
da85985c | 1645 | struct f2fs_map_blocks map = { .m_next_pgofs = NULL }; |
d323d005 CY |
1646 | struct extent_info ei; |
1647 | pgoff_t pg_start, pg_end; | |
3519e3f9 | 1648 | unsigned int blk_per_seg = sbi->blocks_per_seg; |
d323d005 | 1649 | unsigned int total = 0, sec_num; |
3519e3f9 | 1650 | unsigned int pages_per_sec = sbi->segs_per_sec * blk_per_seg; |
d323d005 CY |
1651 | block_t blk_end = 0; |
1652 | bool fragmented = false; | |
1653 | int err; | |
1654 | ||
1655 | /* if in-place-update policy is enabled, don't waste time here */ | |
1656 | if (need_inplace_update(inode)) | |
1657 | return -EINVAL; | |
1658 | ||
09cbfeaf KS |
1659 | pg_start = range->start >> PAGE_SHIFT; |
1660 | pg_end = (range->start + range->len) >> PAGE_SHIFT; | |
d323d005 | 1661 | |
2c4db1a6 | 1662 | f2fs_balance_fs(sbi, true); |
d323d005 | 1663 | |
5955102c | 1664 | inode_lock(inode); |
d323d005 CY |
1665 | |
1666 | /* writeback all dirty pages in the range */ | |
1667 | err = filemap_write_and_wait_range(inode->i_mapping, range->start, | |
d8fe4f0e | 1668 | range->start + range->len - 1); |
d323d005 CY |
1669 | if (err) |
1670 | goto out; | |
1671 | ||
1672 | /* | |
1673 | * lookup mapping info in extent cache, skip defragmenting if physical | |
1674 | * block addresses are continuous. | |
1675 | */ | |
1676 | if (f2fs_lookup_extent_cache(inode, pg_start, &ei)) { | |
1677 | if (ei.fofs + ei.len >= pg_end) | |
1678 | goto out; | |
1679 | } | |
1680 | ||
1681 | map.m_lblk = pg_start; | |
d323d005 CY |
1682 | |
1683 | /* | |
1684 | * lookup mapping info in dnode page cache, skip defragmenting if all | |
1685 | * physical block addresses are continuous even if there are hole(s) | |
1686 | * in logical blocks. | |
1687 | */ | |
1688 | while (map.m_lblk < pg_end) { | |
a1c1e9b7 | 1689 | map.m_len = pg_end - map.m_lblk; |
d323d005 CY |
1690 | err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_READ); |
1691 | if (err) | |
1692 | goto out; | |
1693 | ||
1694 | if (!(map.m_flags & F2FS_MAP_FLAGS)) { | |
1695 | map.m_lblk++; | |
d323d005 CY |
1696 | continue; |
1697 | } | |
1698 | ||
1699 | if (blk_end && blk_end != map.m_pblk) { | |
1700 | fragmented = true; | |
1701 | break; | |
1702 | } | |
1703 | blk_end = map.m_pblk + map.m_len; | |
1704 | ||
1705 | map.m_lblk += map.m_len; | |
d323d005 CY |
1706 | } |
1707 | ||
1708 | if (!fragmented) | |
1709 | goto out; | |
1710 | ||
1711 | map.m_lblk = pg_start; | |
1712 | map.m_len = pg_end - pg_start; | |
1713 | ||
1714 | sec_num = (map.m_len + pages_per_sec - 1) / pages_per_sec; | |
1715 | ||
1716 | /* | |
1717 | * make sure there are enough free section for LFS allocation, this can | |
1718 | * avoid defragment running in SSR mode when free section are allocated | |
1719 | * intensively | |
1720 | */ | |
1721 | if (has_not_enough_free_secs(sbi, sec_num)) { | |
1722 | err = -EAGAIN; | |
1723 | goto out; | |
1724 | } | |
1725 | ||
1726 | while (map.m_lblk < pg_end) { | |
1727 | pgoff_t idx; | |
1728 | int cnt = 0; | |
1729 | ||
1730 | do_map: | |
a1c1e9b7 | 1731 | map.m_len = pg_end - map.m_lblk; |
d323d005 CY |
1732 | err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_READ); |
1733 | if (err) | |
1734 | goto clear_out; | |
1735 | ||
1736 | if (!(map.m_flags & F2FS_MAP_FLAGS)) { | |
1737 | map.m_lblk++; | |
1738 | continue; | |
1739 | } | |
1740 | ||
1741 | set_inode_flag(F2FS_I(inode), FI_DO_DEFRAG); | |
1742 | ||
1743 | idx = map.m_lblk; | |
1744 | while (idx < map.m_lblk + map.m_len && cnt < blk_per_seg) { | |
1745 | struct page *page; | |
1746 | ||
1747 | page = get_lock_data_page(inode, idx, true); | |
1748 | if (IS_ERR(page)) { | |
1749 | err = PTR_ERR(page); | |
1750 | goto clear_out; | |
1751 | } | |
1752 | ||
1753 | set_page_dirty(page); | |
1754 | f2fs_put_page(page, 1); | |
1755 | ||
1756 | idx++; | |
1757 | cnt++; | |
1758 | total++; | |
1759 | } | |
1760 | ||
1761 | map.m_lblk = idx; | |
d323d005 CY |
1762 | |
1763 | if (idx < pg_end && cnt < blk_per_seg) | |
1764 | goto do_map; | |
1765 | ||
1766 | clear_inode_flag(F2FS_I(inode), FI_DO_DEFRAG); | |
1767 | ||
1768 | err = filemap_fdatawrite(inode->i_mapping); | |
1769 | if (err) | |
1770 | goto out; | |
1771 | } | |
1772 | clear_out: | |
1773 | clear_inode_flag(F2FS_I(inode), FI_DO_DEFRAG); | |
1774 | out: | |
5955102c | 1775 | inode_unlock(inode); |
d323d005 | 1776 | if (!err) |
09cbfeaf | 1777 | range->len = (u64)total << PAGE_SHIFT; |
d323d005 CY |
1778 | return err; |
1779 | } | |
1780 | ||
1781 | static int f2fs_ioc_defragment(struct file *filp, unsigned long arg) | |
1782 | { | |
1783 | struct inode *inode = file_inode(filp); | |
1784 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1785 | struct f2fs_defragment range; | |
1786 | int err; | |
1787 | ||
1788 | if (!capable(CAP_SYS_ADMIN)) | |
1789 | return -EPERM; | |
1790 | ||
1791 | if (!S_ISREG(inode->i_mode)) | |
1792 | return -EINVAL; | |
1793 | ||
1794 | err = mnt_want_write_file(filp); | |
1795 | if (err) | |
1796 | return err; | |
1797 | ||
1798 | if (f2fs_readonly(sbi->sb)) { | |
1799 | err = -EROFS; | |
1800 | goto out; | |
1801 | } | |
1802 | ||
1803 | if (copy_from_user(&range, (struct f2fs_defragment __user *)arg, | |
1804 | sizeof(range))) { | |
1805 | err = -EFAULT; | |
1806 | goto out; | |
1807 | } | |
1808 | ||
1809 | /* verify alignment of offset & size */ | |
1810 | if (range.start & (F2FS_BLKSIZE - 1) || | |
1811 | range.len & (F2FS_BLKSIZE - 1)) { | |
1812 | err = -EINVAL; | |
1813 | goto out; | |
1814 | } | |
1815 | ||
1816 | err = f2fs_defragment_range(sbi, filp, &range); | |
d0239e1b | 1817 | f2fs_update_time(sbi, REQ_TIME); |
d323d005 CY |
1818 | if (err < 0) |
1819 | goto out; | |
1820 | ||
1821 | if (copy_to_user((struct f2fs_defragment __user *)arg, &range, | |
1822 | sizeof(range))) | |
1823 | err = -EFAULT; | |
1824 | out: | |
1825 | mnt_drop_write_file(filp); | |
1826 | return err; | |
1827 | } | |
1828 | ||
52656e6c JK |
1829 | long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
1830 | { | |
1831 | switch (cmd) { | |
1832 | case F2FS_IOC_GETFLAGS: | |
1833 | return f2fs_ioc_getflags(filp, arg); | |
1834 | case F2FS_IOC_SETFLAGS: | |
1835 | return f2fs_ioc_setflags(filp, arg); | |
d49f3e89 CY |
1836 | case F2FS_IOC_GETVERSION: |
1837 | return f2fs_ioc_getversion(filp, arg); | |
88b88a66 JK |
1838 | case F2FS_IOC_START_ATOMIC_WRITE: |
1839 | return f2fs_ioc_start_atomic_write(filp); | |
1840 | case F2FS_IOC_COMMIT_ATOMIC_WRITE: | |
1841 | return f2fs_ioc_commit_atomic_write(filp); | |
02a1335f JK |
1842 | case F2FS_IOC_START_VOLATILE_WRITE: |
1843 | return f2fs_ioc_start_volatile_write(filp); | |
1e84371f JK |
1844 | case F2FS_IOC_RELEASE_VOLATILE_WRITE: |
1845 | return f2fs_ioc_release_volatile_write(filp); | |
1846 | case F2FS_IOC_ABORT_VOLATILE_WRITE: | |
1847 | return f2fs_ioc_abort_volatile_write(filp); | |
1abff93d JK |
1848 | case F2FS_IOC_SHUTDOWN: |
1849 | return f2fs_ioc_shutdown(filp, arg); | |
52656e6c JK |
1850 | case FITRIM: |
1851 | return f2fs_ioc_fitrim(filp, arg); | |
f424f664 JK |
1852 | case F2FS_IOC_SET_ENCRYPTION_POLICY: |
1853 | return f2fs_ioc_set_encryption_policy(filp, arg); | |
1854 | case F2FS_IOC_GET_ENCRYPTION_POLICY: | |
1855 | return f2fs_ioc_get_encryption_policy(filp, arg); | |
1856 | case F2FS_IOC_GET_ENCRYPTION_PWSALT: | |
1857 | return f2fs_ioc_get_encryption_pwsalt(filp, arg); | |
c1c1b583 CY |
1858 | case F2FS_IOC_GARBAGE_COLLECT: |
1859 | return f2fs_ioc_gc(filp, arg); | |
456b88e4 CY |
1860 | case F2FS_IOC_WRITE_CHECKPOINT: |
1861 | return f2fs_ioc_write_checkpoint(filp, arg); | |
d323d005 CY |
1862 | case F2FS_IOC_DEFRAGMENT: |
1863 | return f2fs_ioc_defragment(filp, arg); | |
fbfa2cc5 JK |
1864 | default: |
1865 | return -ENOTTY; | |
1866 | } | |
1867 | } | |
1868 | ||
fcc85a4d JK |
1869 | static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) |
1870 | { | |
b439b103 JK |
1871 | struct file *file = iocb->ki_filp; |
1872 | struct inode *inode = file_inode(file); | |
1873 | ssize_t ret; | |
fcc85a4d JK |
1874 | |
1875 | if (f2fs_encrypted_inode(inode) && | |
0b81d077 JK |
1876 | !fscrypt_has_encryption_key(inode) && |
1877 | fscrypt_get_encryption_info(inode)) | |
fcc85a4d JK |
1878 | return -EACCES; |
1879 | ||
b439b103 JK |
1880 | inode_lock(inode); |
1881 | ret = generic_write_checks(iocb, from); | |
1882 | if (ret > 0) { | |
1883 | ret = f2fs_preallocate_blocks(iocb, from); | |
1884 | if (!ret) | |
1885 | ret = __generic_file_write_iter(iocb, from); | |
1886 | } | |
1887 | inode_unlock(inode); | |
1888 | ||
1889 | if (ret > 0) { | |
1890 | ssize_t err; | |
1891 | ||
1892 | err = generic_write_sync(file, iocb->ki_pos - ret, ret); | |
1893 | if (err < 0) | |
1894 | ret = err; | |
1895 | } | |
1896 | return ret; | |
fcc85a4d JK |
1897 | } |
1898 | ||
e9750824 NJ |
1899 | #ifdef CONFIG_COMPAT |
1900 | long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
1901 | { | |
1902 | switch (cmd) { | |
1903 | case F2FS_IOC32_GETFLAGS: | |
1904 | cmd = F2FS_IOC_GETFLAGS; | |
1905 | break; | |
1906 | case F2FS_IOC32_SETFLAGS: | |
1907 | cmd = F2FS_IOC_SETFLAGS; | |
1908 | break; | |
04ef4b62 CY |
1909 | case F2FS_IOC32_GETVERSION: |
1910 | cmd = F2FS_IOC_GETVERSION; | |
1911 | break; | |
1912 | case F2FS_IOC_START_ATOMIC_WRITE: | |
1913 | case F2FS_IOC_COMMIT_ATOMIC_WRITE: | |
1914 | case F2FS_IOC_START_VOLATILE_WRITE: | |
1915 | case F2FS_IOC_RELEASE_VOLATILE_WRITE: | |
1916 | case F2FS_IOC_ABORT_VOLATILE_WRITE: | |
1917 | case F2FS_IOC_SHUTDOWN: | |
1918 | case F2FS_IOC_SET_ENCRYPTION_POLICY: | |
1919 | case F2FS_IOC_GET_ENCRYPTION_PWSALT: | |
1920 | case F2FS_IOC_GET_ENCRYPTION_POLICY: | |
1921 | case F2FS_IOC_GARBAGE_COLLECT: | |
1922 | case F2FS_IOC_WRITE_CHECKPOINT: | |
1923 | case F2FS_IOC_DEFRAGMENT: | |
1924 | break; | |
e9750824 NJ |
1925 | default: |
1926 | return -ENOIOCTLCMD; | |
1927 | } | |
1928 | return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); | |
1929 | } | |
1930 | #endif | |
1931 | ||
fbfa2cc5 | 1932 | const struct file_operations f2fs_file_operations = { |
267378d4 | 1933 | .llseek = f2fs_llseek, |
aad4f8bb | 1934 | .read_iter = generic_file_read_iter, |
fcc85a4d JK |
1935 | .write_iter = f2fs_file_write_iter, |
1936 | .open = f2fs_file_open, | |
12662234 | 1937 | .release = f2fs_release_file, |
fbfa2cc5 JK |
1938 | .mmap = f2fs_file_mmap, |
1939 | .fsync = f2fs_sync_file, | |
1940 | .fallocate = f2fs_fallocate, | |
1941 | .unlocked_ioctl = f2fs_ioctl, | |
e9750824 NJ |
1942 | #ifdef CONFIG_COMPAT |
1943 | .compat_ioctl = f2fs_compat_ioctl, | |
1944 | #endif | |
fbfa2cc5 | 1945 | .splice_read = generic_file_splice_read, |
8d020765 | 1946 | .splice_write = iter_file_splice_write, |
fbfa2cc5 | 1947 | }; |