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f2fs: avoid wrong f2fs_bug_on when truncating inline_data
[deliverable/linux.git] / fs / f2fs / file.c
CommitLineData
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>
fbfa2cc5
JK		 23
24#include "f2fs.h"
25#include "node.h"
26#include "segment.h"
27#include "xattr.h"
28#include "acl.h"
db9f7c1a 29#include "trace.h"
a2a4a7e4 30#include <trace/events/f2fs.h>
fbfa2cc5
JK		 31
32static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma,
33 struct vm_fault *vmf)
34{
35 struct page *page = vmf->page;
6131ffaa 36 struct inode *inode = file_inode(vma->vm_file);
4081363f 37 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
fbfa2cc5 38 struct dnode_of_data dn;
e479556b 39 int err;
fbfa2cc5
JK		 40
41 f2fs_balance_fs(sbi);
42
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
9851e6e1 58 file_update_time(vma->vm_file);
fbfa2cc5 59 lock_page(page);
6bacf52f 60 if (unlikely(page->mapping != inode->i_mapping ||
9851e6e1 61 page_offset(page) > i_size_read(inode) ||
6bacf52f 62 !PageUptodate(page))) {
fbfa2cc5
JK		 63 unlock_page(page);
64 err = -EFAULT;
65 goto out;
66 }
67
68 /*
69 * check to see if the page is mapped already (no holes)
70 */
71 if (PageMappedToDisk(page))
9851e6e1 72 goto mapped;
fbfa2cc5
JK		 73
74 /* page is wholly or partially inside EOF */
75 if (((page->index + 1) << PAGE_CACHE_SHIFT) > i_size_read(inode)) {
76 unsigned offset;
77 offset = i_size_read(inode) & ~PAGE_CACHE_MASK;
78 zero_user_segment(page, offset, PAGE_CACHE_SIZE);
79 }
80 set_page_dirty(page);
81 SetPageUptodate(page);
82
e943a10d 83 trace_f2fs_vm_page_mkwrite(page, DATA);
9851e6e1
NJ		 84mapped:
85 /* fill the page */
3cb5ad15 86 f2fs_wait_on_page_writeback(page, DATA);
fbfa2cc5
JK		 87out:
88 sb_end_pagefault(inode->i_sb);
89 return block_page_mkwrite_return(err);
90}
91
92static const struct vm_operations_struct f2fs_file_vm_ops = {
692bb55d 93 .fault = filemap_fault,
f1820361 94 .map_pages = filemap_map_pages,
692bb55d 95 .page_mkwrite = f2fs_vm_page_mkwrite,
fbfa2cc5
JK		 96};
97
354a3399
JK		 98static int get_parent_ino(struct inode *inode, nid_t *pino)
99{
100 struct dentry *dentry;
101
102 inode = igrab(inode);
103 dentry = d_find_any_alias(inode);
104 iput(inode);
105 if (!dentry)
106 return 0;
107
f0947e5c
JK		 108 if (update_dent_inode(inode, &dentry->d_name)) {
109 dput(dentry);
110 return 0;
111 }
354a3399 112
f0947e5c
JK		 113 *pino = parent_ino(dentry);
114 dput(dentry);
354a3399
JK		 115 return 1;
116}
117
9d1589ef
CY		 118static inline bool need_do_checkpoint(struct inode *inode)
119{
4081363f 120 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
9d1589ef
CY		 121 bool need_cp = false;
122
123 if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1)
124 need_cp = true;
125 else if (file_wrong_pino(inode))
126 need_cp = true;
127 else if (!space_for_roll_forward(sbi))
128 need_cp = true;
129 else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino))
130 need_cp = true;
131 else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi)))
132 need_cp = true;
d5053a34
JK		 133 else if (test_opt(sbi, FASTBOOT))
134 need_cp = true;
a344b9fd
JK		 135 else if (sbi->active_logs == 2)
136 need_cp = true;
9d1589ef
CY		 137
138 return need_cp;
139}
140
9c7bb702
CL		 141static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino)
142{
143 struct page *i = find_get_page(NODE_MAPPING(sbi), ino);
144 bool ret = false;
145 /* But we need to avoid that there are some inode updates */
146 if ((i && PageDirty(i)) || need_inode_block_update(sbi, ino))
147 ret = true;
148 f2fs_put_page(i, 0);
149 return ret;
150}
151
51455b19
CL		 152static void try_to_fix_pino(struct inode *inode)
153{
154 struct f2fs_inode_info *fi = F2FS_I(inode);
155 nid_t pino;
156
157 down_write(&fi->i_sem);
158 fi->xattr_ver = 0;
159 if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
160 get_parent_ino(inode, &pino)) {
161 fi->i_pino = pino;
162 file_got_pino(inode);
163 up_write(&fi->i_sem);
164
165 mark_inode_dirty_sync(inode);
166 f2fs_write_inode(inode, NULL);
167 } else {
168 up_write(&fi->i_sem);
169 }
170}
171
fbfa2cc5
JK		 172int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
173{
174 struct inode *inode = file->f_mapping->host;
d928bfbf 175 struct f2fs_inode_info *fi = F2FS_I(inode);
4081363f 176 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2403c155 177 nid_t ino = inode->i_ino;
fbfa2cc5
JK		 178 int ret = 0;
179 bool need_cp = false;
180 struct writeback_control wbc = {
c81bf1c8 181 .sync_mode = WB_SYNC_ALL,
fbfa2cc5
JK		 182 .nr_to_write = LONG_MAX,
183 .for_reclaim = 0,
184 };
185
6bacf52f 186 if (unlikely(f2fs_readonly(inode->i_sb)))
1fa95b0b
NJ		 187 return 0;
188
a2a4a7e4 189 trace_f2fs_sync_file_enter(inode);
ea1aa12c
JK		 190
191 /* if fdatasync is triggered, let's do in-place-update */
c1ce1b02 192 if (get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks)
ea1aa12c 193 set_inode_flag(fi, FI_NEED_IPU);
fbfa2cc5 194 ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
c1ce1b02
JK		 195 clear_inode_flag(fi, FI_NEED_IPU);
196
a2a4a7e4
NJ		 197 if (ret) {
198 trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
fbfa2cc5 199 return ret;
a2a4a7e4 200 }
fbfa2cc5 201
9c7bb702
CL		 202 /* if the inode is dirty, let's recover all the time */
203 if (!datasync && is_inode_flag_set(fi, FI_DIRTY_INODE)) {
204 update_inode_page(inode);
205 goto go_write;
206 }
207
6d99ba41
JK		 208 /*
209 * if there is no written data, don't waste time to write recovery info.
210 */
211 if (!is_inode_flag_set(fi, FI_APPEND_WRITE) &&
2403c155 212 !exist_written_data(sbi, ino, APPEND_INO)) {
19c9c466 213
9c7bb702
CL		 214 /* it may call write_inode just prior to fsync */
215 if (need_inode_page_update(sbi, ino))
19c9c466 216 goto go_write;
19c9c466 217
6d99ba41 218 if (is_inode_flag_set(fi, FI_UPDATE_WRITE) ||
2403c155 219 exist_written_data(sbi, ino, UPDATE_INO))
6d99ba41
JK		 220 goto flush_out;
221 goto out;
222 }
19c9c466 223go_write:
7d82db83
JK		 224 /* guarantee free sections for fsync */
225 f2fs_balance_fs(sbi);
226
e5d2385e
JK		 227 /*
228 * Both of fdatasync() and fsync() are able to be recovered from
229 * sudden-power-off.
230 */
9d1589ef
CY		 231 down_read(&fi->i_sem);
232 need_cp = need_do_checkpoint(inode);
d928bfbf
JK		 233 up_read(&fi->i_sem);
234
fbfa2cc5
JK		 235 if (need_cp) {
236 /* all the dirty node pages should be flushed for POR */
237 ret = f2fs_sync_fs(inode->i_sb, 1);
d928bfbf 238
51455b19
CL		 239 /*
240 * We've secured consistency through sync_fs. Following pino
241 * will be used only for fsynced inodes after checkpoint.
242 */
243 try_to_fix_pino(inode);
cff28521
JK		 244 clear_inode_flag(fi, FI_APPEND_WRITE);
245 clear_inode_flag(fi, FI_UPDATE_WRITE);
51455b19
CL		 246 goto out;
247 }
88bd02c9 248sync_nodes:
51455b19
CL		 249 sync_node_pages(sbi, ino, &wbc);
250
871f599f
JK		 251 /* if cp_error was enabled, we should avoid infinite loop */
252 if (unlikely(f2fs_cp_error(sbi)))
253 goto out;
254
51455b19
CL		 255 if (need_inode_block_update(sbi, ino)) {
256 mark_inode_dirty_sync(inode);
257 f2fs_write_inode(inode, NULL);
258 goto sync_nodes;
fbfa2cc5 259 }
51455b19
CL		 260
261 ret = wait_on_node_pages_writeback(sbi, ino);
262 if (ret)
263 goto out;
264
265 /* once recovery info is written, don't need to tack this */
266 remove_dirty_inode(sbi, ino, APPEND_INO);
267 clear_inode_flag(fi, FI_APPEND_WRITE);
268flush_out:
269 remove_dirty_inode(sbi, ino, UPDATE_INO);
270 clear_inode_flag(fi, FI_UPDATE_WRITE);
271 ret = f2fs_issue_flush(sbi);
fbfa2cc5 272out:
a2a4a7e4 273 trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
db9f7c1a 274 f2fs_trace_ios(NULL, NULL, 1);
fbfa2cc5
JK		 275 return ret;
276}
277
7f7670fe
JK		 278static pgoff_t __get_first_dirty_index(struct address_space *mapping,
279 pgoff_t pgofs, int whence)
280{
281 struct pagevec pvec;
282 int nr_pages;
283
284 if (whence != SEEK_DATA)
285 return 0;
286
287 /* find first dirty page index */
288 pagevec_init(&pvec, 0);
65b85ccc
JK		 289 nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs,
290 PAGECACHE_TAG_DIRTY, 1);
291 pgofs = nr_pages ? pvec.pages[0]->index : LONG_MAX;
7f7670fe
JK		 292 pagevec_release(&pvec);
293 return pgofs;
294}
295
296static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs,
297 int whence)
298{
299 switch (whence) {
300 case SEEK_DATA:
301 if ((blkaddr == NEW_ADDR && dirty == pgofs) ||
302 (blkaddr != NEW_ADDR && blkaddr != NULL_ADDR))
303 return true;
304 break;
305 case SEEK_HOLE:
306 if (blkaddr == NULL_ADDR)
307 return true;
308 break;
309 }
310 return false;
311}
312
267378d4
CY		 313static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
314{
315 struct inode *inode = file->f_mapping->host;
316 loff_t maxbytes = inode->i_sb->s_maxbytes;
317 struct dnode_of_data dn;
7f7670fe
JK		 318 pgoff_t pgofs, end_offset, dirty;
319 loff_t data_ofs = offset;
320 loff_t isize;
267378d4
CY		 321 int err = 0;
322
323 mutex_lock(&inode->i_mutex);
324
325 isize = i_size_read(inode);
326 if (offset >= isize)
327 goto fail;
328
329 /* handle inline data case */
622f28ae 330 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {
267378d4
CY		 331 if (whence == SEEK_HOLE)
332 data_ofs = isize;
333 goto found;
334 }
335
336 pgofs = (pgoff_t)(offset >> PAGE_CACHE_SHIFT);
337
7f7670fe
JK		 338 dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence);
339
267378d4
CY		 340 for (; data_ofs < isize; data_ofs = pgofs << PAGE_CACHE_SHIFT) {
341 set_new_dnode(&dn, inode, NULL, NULL, 0);
342 err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE_RA);
343 if (err && err != -ENOENT) {
344 goto fail;
345 } else if (err == -ENOENT) {
e1c42045 346 /* direct node does not exists */
267378d4
CY		 347 if (whence == SEEK_DATA) {
348 pgofs = PGOFS_OF_NEXT_DNODE(pgofs,
349 F2FS_I(inode));
350 continue;
351 } else {
352 goto found;
353 }
354 }
355
6b2920a5 356 end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode));
267378d4
CY		 357
358 /* find data/hole in dnode block */
359 for (; dn.ofs_in_node < end_offset;
360 dn.ofs_in_node++, pgofs++,
2e023174 361 data_ofs = (loff_t)pgofs << PAGE_CACHE_SHIFT) {
267378d4
CY		 362 block_t blkaddr;
363 blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node);
364
7f7670fe 365 if (__found_offset(blkaddr, dirty, pgofs, whence)) {
267378d4
CY		 366 f2fs_put_dnode(&dn);
367 goto found;
368 }
369 }
370 f2fs_put_dnode(&dn);
371 }
372
373 if (whence == SEEK_DATA)
374 goto fail;
267378d4 375found:
fe369bc8
JK		 376 if (whence == SEEK_HOLE && data_ofs > isize)
377 data_ofs = isize;
267378d4
CY		 378 mutex_unlock(&inode->i_mutex);
379 return vfs_setpos(file, data_ofs, maxbytes);
380fail:
381 mutex_unlock(&inode->i_mutex);
382 return -ENXIO;
383}
384
385static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence)
386{
387 struct inode *inode = file->f_mapping->host;
388 loff_t maxbytes = inode->i_sb->s_maxbytes;
389
390 switch (whence) {
391 case SEEK_SET:
392 case SEEK_CUR:
393 case SEEK_END:
394 return generic_file_llseek_size(file, offset, whence,
395 maxbytes, i_size_read(inode));
396 case SEEK_DATA:
397 case SEEK_HOLE:
0b4c5afd
JK		 398 if (offset < 0)
399 return -ENXIO;
267378d4
CY		 400 return f2fs_seek_block(file, offset, whence);
401 }
402
403 return -EINVAL;
404}
405
fbfa2cc5
JK		 406static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma)
407{
b3d208f9
JK		 408 struct inode *inode = file_inode(file);
409
410 /* we don't need to use inline_data strictly */
411 if (f2fs_has_inline_data(inode)) {
412 int err = f2fs_convert_inline_inode(inode);
413 if (err)
414 return err;
415 }
416
fbfa2cc5
JK		 417 file_accessed(file);
418 vma->vm_ops = &f2fs_file_vm_ops;
419 return 0;
420}
421
b292dcab 422int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
fbfa2cc5
JK		 423{
424 int nr_free = 0, ofs = dn->ofs_in_node;
4081363f 425 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
fbfa2cc5
JK		 426 struct f2fs_node *raw_node;
427 __le32 *addr;
428
45590710 429 raw_node = F2FS_NODE(dn->node_page);
fbfa2cc5
JK		 430 addr = blkaddr_in_node(raw_node) + ofs;
431
6c311ec6 432 for (; count > 0; count--, addr++, dn->ofs_in_node++) {
fbfa2cc5
JK		 433 block_t blkaddr = le32_to_cpu(*addr);
434 if (blkaddr == NULL_ADDR)
435 continue;
436
e1509cf2 437 dn->data_blkaddr = NULL_ADDR;
7e4dde79 438 f2fs_update_extent_cache(dn);
fbfa2cc5 439 invalidate_blocks(sbi, blkaddr);
fbfa2cc5
JK		 440 nr_free++;
441 }
442 if (nr_free) {
d7cc950b 443 dec_valid_block_count(sbi, dn->inode, nr_free);
fbfa2cc5
JK		 444 set_page_dirty(dn->node_page);
445 sync_inode_page(dn);
446 }
447 dn->ofs_in_node = ofs;
51dd6249
NJ		 448
449 trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
450 dn->ofs_in_node, nr_free);
fbfa2cc5
JK		 451 return nr_free;
452}
453
454void truncate_data_blocks(struct dnode_of_data *dn)
455{
456 truncate_data_blocks_range(dn, ADDRS_PER_BLOCK);
457}
458
0bfcfcca
CY		 459static int truncate_partial_data_page(struct inode *inode, u64 from,
460 bool force)
fbfa2cc5
JK		 461{
462 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
463 struct page *page;
464
0bfcfcca 465 if (!offset && !force)
b3d208f9 466 return 0;
fbfa2cc5 467
0bfcfcca 468 page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, force);
fbfa2cc5 469 if (IS_ERR(page))
b3d208f9 470 return 0;
fbfa2cc5
JK		 471
472 lock_page(page);
ca0a81b3
CY		 473 if (unlikely(!PageUptodate(page) ||
474 page->mapping != inode->i_mapping))
475 goto out;
476
3cb5ad15 477 f2fs_wait_on_page_writeback(page, DATA);
fbfa2cc5 478 zero_user(page, offset, PAGE_CACHE_SIZE - offset);
0bfcfcca
CY		 479 if (!force)
480 set_page_dirty(page);
ca0a81b3 481out:
fbfa2cc5 482 f2fs_put_page(page, 1);
b3d208f9 483 return 0;
fbfa2cc5
JK		 484}
485
764aa3e9 486int truncate_blocks(struct inode *inode, u64 from, bool lock)
fbfa2cc5 487{
4081363f 488 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
fbfa2cc5
JK		 489 unsigned int blocksize = inode->i_sb->s_blocksize;
490 struct dnode_of_data dn;
491 pgoff_t free_from;
9ffe0fb5 492 int count = 0, err = 0;
b3d208f9 493 struct page *ipage;
0bfcfcca 494 bool truncate_page = false;
fbfa2cc5 495
51dd6249
NJ		 496 trace_f2fs_truncate_blocks_enter(inode, from);
497
f7ef9b83 498 free_from = (pgoff_t)F2FS_BYTES_TO_BLK(from + blocksize - 1);
fbfa2cc5 499
764aa3e9
JK		 500 if (lock)
501 f2fs_lock_op(sbi);
9ffe0fb5 502
b3d208f9
JK		 503 ipage = get_node_page(sbi, inode->i_ino);
504 if (IS_ERR(ipage)) {
505 err = PTR_ERR(ipage);
506 goto out;
507 }
508
509 if (f2fs_has_inline_data(inode)) {
0bfcfcca
CY		 510 if (truncate_inline_inode(ipage, from))
511 set_page_dirty(ipage);
b3d208f9 512 f2fs_put_page(ipage, 1);
0bfcfcca 513 truncate_page = true;
b3d208f9
JK		 514 goto out;
515 }
516
517 set_new_dnode(&dn, inode, ipage, NULL, 0);
266e97a8 518 err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE);
fbfa2cc5
JK		 519 if (err) {
520 if (err == -ENOENT)
521 goto free_next;
b3d208f9 522 goto out;
1ce86bf6
JK		 523 }
524
6403eb1f 525 count = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode));
fbfa2cc5
JK		 526
527 count -= dn.ofs_in_node;
9850cf4a 528 f2fs_bug_on(sbi, count < 0);
39936837 529
fbfa2cc5
JK		 530 if (dn.ofs_in_node || IS_INODE(dn.node_page)) {
531 truncate_data_blocks_range(&dn, count);
532 free_from += count;
533 }
534
535 f2fs_put_dnode(&dn);
536free_next:
537 err = truncate_inode_blocks(inode, free_from);
764d2c80
JK		 538out:
539 if (lock)
540 f2fs_unlock_op(sbi);
b3d208f9
JK		 541
542 /* lastly zero out the first data page */
543 if (!err)
0bfcfcca 544 err = truncate_partial_data_page(inode, from, truncate_page);
fbfa2cc5 545
51dd6249 546 trace_f2fs_truncate_blocks_exit(inode, err);
fbfa2cc5
JK		 547 return err;
548}
549
550void f2fs_truncate(struct inode *inode)
551{
552 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
553 S_ISLNK(inode->i_mode)))
554 return;
555
51dd6249
NJ		 556 trace_f2fs_truncate(inode);
557
92dffd01
JK		 558 /* we should check inline_data size */
559 if (f2fs_has_inline_data(inode) && !f2fs_may_inline(inode)) {
560 if (f2fs_convert_inline_inode(inode))
561 return;
562 }
563
764aa3e9 564 if (!truncate_blocks(inode, i_size_read(inode), true)) {
fbfa2cc5
JK		 565 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
566 mark_inode_dirty(inode);
567 }
fbfa2cc5
JK		 568}
569
2d4d9fb5 570int f2fs_getattr(struct vfsmount *mnt,
fbfa2cc5
JK		 571 struct dentry *dentry, struct kstat *stat)
572{
573 struct inode *inode = dentry->d_inode;
574 generic_fillattr(inode, stat);
575 stat->blocks <<= 3;
576 return 0;
577}
578
579#ifdef CONFIG_F2FS_FS_POSIX_ACL
580static void __setattr_copy(struct inode *inode, const struct iattr *attr)
581{
582 struct f2fs_inode_info *fi = F2FS_I(inode);
583 unsigned int ia_valid = attr->ia_valid;
584
585 if (ia_valid & ATTR_UID)
586 inode->i_uid = attr->ia_uid;
587 if (ia_valid & ATTR_GID)
588 inode->i_gid = attr->ia_gid;
589 if (ia_valid & ATTR_ATIME)
590 inode->i_atime = timespec_trunc(attr->ia_atime,
591 inode->i_sb->s_time_gran);
592 if (ia_valid & ATTR_MTIME)
593 inode->i_mtime = timespec_trunc(attr->ia_mtime,
594 inode->i_sb->s_time_gran);
595 if (ia_valid & ATTR_CTIME)
596 inode->i_ctime = timespec_trunc(attr->ia_ctime,
597 inode->i_sb->s_time_gran);
598 if (ia_valid & ATTR_MODE) {
599 umode_t mode = attr->ia_mode;
600
601 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
602 mode &= ~S_ISGID;
603 set_acl_inode(fi, mode);
604 }
605}
606#else
607#define __setattr_copy setattr_copy
608#endif
609
610int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
611{
612 struct inode *inode = dentry->d_inode;
613 struct f2fs_inode_info *fi = F2FS_I(inode);
614 int err;
615
616 err = inode_change_ok(inode, attr);
617 if (err)
618 return err;
619
09db6a2e 620 if (attr->ia_valid & ATTR_SIZE) {
09db6a2e
CY		 621 if (attr->ia_size != i_size_read(inode)) {
622 truncate_setsize(inode, attr->ia_size);
623 f2fs_truncate(inode);
624 f2fs_balance_fs(F2FS_I_SB(inode));
625 } else {
626 /*
627 * giving a chance to truncate blocks past EOF which
628 * are fallocated with FALLOC_FL_KEEP_SIZE.
629 */
630 f2fs_truncate(inode);
631 }
fbfa2cc5
JK		 632 }
633
634 __setattr_copy(inode, attr);
635
636 if (attr->ia_valid & ATTR_MODE) {
a6dda0e6 637 err = posix_acl_chmod(inode, get_inode_mode(inode));
fbfa2cc5
JK		 638 if (err || is_inode_flag_set(fi, FI_ACL_MODE)) {
639 inode->i_mode = fi->i_acl_mode;
640 clear_inode_flag(fi, FI_ACL_MODE);
641 }
642 }
643
644 mark_inode_dirty(inode);
645 return err;
646}
647
648const struct inode_operations f2fs_file_inode_operations = {
649 .getattr = f2fs_getattr,
650 .setattr = f2fs_setattr,
651 .get_acl = f2fs_get_acl,
a6dda0e6 652 .set_acl = f2fs_set_acl,
fbfa2cc5
JK		 653#ifdef CONFIG_F2FS_FS_XATTR
654 .setxattr = generic_setxattr,
655 .getxattr = generic_getxattr,
656 .listxattr = f2fs_listxattr,
657 .removexattr = generic_removexattr,
658#endif
9ab70134 659 .fiemap = f2fs_fiemap,
fbfa2cc5
JK		 660};
661
662static void fill_zero(struct inode *inode, pgoff_t index,
663 loff_t start, loff_t len)
664{
4081363f 665 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
fbfa2cc5
JK		 666 struct page *page;
667
668 if (!len)
669 return;
670
bd43df02
JK		 671 f2fs_balance_fs(sbi);
672
e479556b 673 f2fs_lock_op(sbi);
64aa7ed9 674 page = get_new_data_page(inode, NULL, index, false);
e479556b 675 f2fs_unlock_op(sbi);
fbfa2cc5
JK		 676
677 if (!IS_ERR(page)) {
3cb5ad15 678 f2fs_wait_on_page_writeback(page, DATA);
fbfa2cc5
JK		 679 zero_user(page, start, len);
680 set_page_dirty(page);
681 f2fs_put_page(page, 1);
682 }
683}
684
685int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
686{
687 pgoff_t index;
688 int err;
689
690 for (index = pg_start; index < pg_end; index++) {
691 struct dnode_of_data dn;
9eaeba70 692
fbfa2cc5 693 set_new_dnode(&dn, inode, NULL, NULL, 0);
266e97a8 694 err = get_dnode_of_data(&dn, index, LOOKUP_NODE);
fbfa2cc5 695 if (err) {
fbfa2cc5
JK		 696 if (err == -ENOENT)
697 continue;
698 return err;
699 }
700
701 if (dn.data_blkaddr != NULL_ADDR)
702 truncate_data_blocks_range(&dn, 1);
703 f2fs_put_dnode(&dn);
fbfa2cc5
JK		 704 }
705 return 0;
706}
707
a66c7b2f 708static int punch_hole(struct inode *inode, loff_t offset, loff_t len)
fbfa2cc5
JK		 709{
710 pgoff_t pg_start, pg_end;
711 loff_t off_start, off_end;
712 int ret = 0;
713
14cecc5c
CY		 714 if (!S_ISREG(inode->i_mode))
715 return -EOPNOTSUPP;
716
717 /* skip punching hole beyond i_size */
718 if (offset >= inode->i_size)
719 return ret;
720
b3d208f9
JK		 721 if (f2fs_has_inline_data(inode)) {
722 ret = f2fs_convert_inline_inode(inode);
723 if (ret)
724 return ret;
725 }
9ffe0fb5 726
fbfa2cc5
JK		 727 pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT;
728 pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT;
729
730 off_start = offset & (PAGE_CACHE_SIZE - 1);
731 off_end = (offset + len) & (PAGE_CACHE_SIZE - 1);
732
733 if (pg_start == pg_end) {
734 fill_zero(inode, pg_start, off_start,
735 off_end - off_start);
736 } else {
737 if (off_start)
738 fill_zero(inode, pg_start++, off_start,
739 PAGE_CACHE_SIZE - off_start);
740 if (off_end)
741 fill_zero(inode, pg_end, 0, off_end);
742
743 if (pg_start < pg_end) {
744 struct address_space *mapping = inode->i_mapping;
745 loff_t blk_start, blk_end;
4081363f 746 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1127a3d4
JH		 747
748 f2fs_balance_fs(sbi);
fbfa2cc5
JK		 749
750 blk_start = pg_start << PAGE_CACHE_SHIFT;
751 blk_end = pg_end << PAGE_CACHE_SHIFT;
752 truncate_inode_pages_range(mapping, blk_start,
753 blk_end - 1);
39936837 754
e479556b 755 f2fs_lock_op(sbi);
fbfa2cc5 756 ret = truncate_hole(inode, pg_start, pg_end);
e479556b 757 f2fs_unlock_op(sbi);
fbfa2cc5
JK		 758 }
759 }
760
fbfa2cc5
JK		 761 return ret;
762}
763
764static int expand_inode_data(struct inode *inode, loff_t offset,
765 loff_t len, int mode)
766{
4081363f 767 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
fbfa2cc5
JK		 768 pgoff_t index, pg_start, pg_end;
769 loff_t new_size = i_size_read(inode);
770 loff_t off_start, off_end;
771 int ret = 0;
772
497a0930
CY		 773 f2fs_balance_fs(sbi);
774
fbfa2cc5
JK		 775 ret = inode_newsize_ok(inode, (len + offset));
776 if (ret)
777 return ret;
778
b3d208f9
JK		 779 if (f2fs_has_inline_data(inode)) {
780 ret = f2fs_convert_inline_inode(inode);
781 if (ret)
782 return ret;
783 }
9e09fc85 784
fbfa2cc5
JK		 785 pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT;
786 pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT;
787
788 off_start = offset & (PAGE_CACHE_SIZE - 1);
789 off_end = (offset + len) & (PAGE_CACHE_SIZE - 1);
790
ead43275
JK		 791 f2fs_lock_op(sbi);
792
fbfa2cc5
JK		 793 for (index = pg_start; index <= pg_end; index++) {
794 struct dnode_of_data dn;
795
98397ff3
JK		 796 if (index == pg_end && !off_end)
797 goto noalloc;
798
fbfa2cc5 799 set_new_dnode(&dn, inode, NULL, NULL, 0);
b600965c 800 ret = f2fs_reserve_block(&dn, index);
b600965c 801 if (ret)
fbfa2cc5 802 break;
98397ff3 803noalloc:
fbfa2cc5
JK		 804 if (pg_start == pg_end)
805 new_size = offset + len;
806 else if (index == pg_start && off_start)
807 new_size = (index + 1) << PAGE_CACHE_SHIFT;
808 else if (index == pg_end)
809 new_size = (index << PAGE_CACHE_SHIFT) + off_end;
810 else
811 new_size += PAGE_CACHE_SIZE;
812 }
813
814 if (!(mode & FALLOC_FL_KEEP_SIZE) &&
815 i_size_read(inode) < new_size) {
816 i_size_write(inode, new_size);
817 mark_inode_dirty(inode);
ead43275 818 update_inode_page(inode);
fbfa2cc5 819 }
ead43275 820 f2fs_unlock_op(sbi);
fbfa2cc5
JK		 821
822 return ret;
823}
824
825static long f2fs_fallocate(struct file *file, int mode,
826 loff_t offset, loff_t len)
827{
6131ffaa 828 struct inode *inode = file_inode(file);
fbfa2cc5
JK		 829 long ret;
830
831 if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
832 return -EOPNOTSUPP;
833
3375f696
CY		 834 mutex_lock(&inode->i_mutex);
835
fbfa2cc5 836 if (mode & FALLOC_FL_PUNCH_HOLE)
a66c7b2f 837 ret = punch_hole(inode, offset, len);
fbfa2cc5
JK		 838 else
839 ret = expand_inode_data(inode, offset, len, mode);
840
3af60a49
NJ		 841 if (!ret) {
842 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
843 mark_inode_dirty(inode);
844 }
3375f696
CY		 845
846 mutex_unlock(&inode->i_mutex);
847
c01e2853 848 trace_f2fs_fallocate(inode, mode, offset, len, ret);
fbfa2cc5
JK		 849 return ret;
850}
851
1e84371f
JK		 852static int f2fs_release_file(struct inode *inode, struct file *filp)
853{
854 /* some remained atomic pages should discarded */
855 if (f2fs_is_atomic_file(inode))
856 commit_inmem_pages(inode, true);
857 if (f2fs_is_volatile_file(inode)) {
858 set_inode_flag(F2FS_I(inode), FI_DROP_CACHE);
859 filemap_fdatawrite(inode->i_mapping);
860 clear_inode_flag(F2FS_I(inode), FI_DROP_CACHE);
861 }
862 return 0;
863}
864
fbfa2cc5
JK		 865#define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL))
866#define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL)
867
868static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags)
869{
870 if (S_ISDIR(mode))
871 return flags;
872 else if (S_ISREG(mode))
873 return flags & F2FS_REG_FLMASK;
874 else
875 return flags & F2FS_OTHER_FLMASK;
876}
877
52656e6c 878static int f2fs_ioc_getflags(struct file *filp, unsigned long arg)
fbfa2cc5 879{
6131ffaa 880 struct inode *inode = file_inode(filp);
fbfa2cc5 881 struct f2fs_inode_info *fi = F2FS_I(inode);
52656e6c
JK		 882 unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE;
883 return put_user(flags, (int __user *)arg);
884}
fbfa2cc5 885
52656e6c
JK		 886static int f2fs_ioc_setflags(struct file *filp, unsigned long arg)
887{
888 struct inode *inode = file_inode(filp);
889 struct f2fs_inode_info *fi = F2FS_I(inode);
890 unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE;
891 unsigned int oldflags;
892 int ret;
fbfa2cc5 893
52656e6c
JK		 894 ret = mnt_want_write_file(filp);
895 if (ret)
896 return ret;
fbfa2cc5 897
52656e6c
JK		 898 if (!inode_owner_or_capable(inode)) {
899 ret = -EACCES;
900 goto out;
901 }
fbfa2cc5 902
52656e6c
JK		 903 if (get_user(flags, (int __user *)arg)) {
904 ret = -EFAULT;
905 goto out;
906 }
fbfa2cc5 907
52656e6c 908 flags = f2fs_mask_flags(inode->i_mode, flags);
fbfa2cc5 909
52656e6c 910 mutex_lock(&inode->i_mutex);
fbfa2cc5 911
52656e6c 912 oldflags = fi->i_flags;
fbfa2cc5 913
52656e6c
JK		 914 if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) {
915 if (!capable(CAP_LINUX_IMMUTABLE)) {
916 mutex_unlock(&inode->i_mutex);
917 ret = -EPERM;
918 goto out;
fbfa2cc5 919 }
52656e6c 920 }
fbfa2cc5 921
52656e6c
JK		 922 flags = flags & FS_FL_USER_MODIFIABLE;
923 flags |= oldflags & ~FS_FL_USER_MODIFIABLE;
924 fi->i_flags = flags;
925 mutex_unlock(&inode->i_mutex);
fbfa2cc5 926
52656e6c
JK		 927 f2fs_set_inode_flags(inode);
928 inode->i_ctime = CURRENT_TIME;
929 mark_inode_dirty(inode);
fbfa2cc5 930out:
52656e6c
JK		 931 mnt_drop_write_file(filp);
932 return ret;
933}
4b2fecc8 934
d49f3e89
CY		 935static int f2fs_ioc_getversion(struct file *filp, unsigned long arg)
936{
937 struct inode *inode = file_inode(filp);
938
939 return put_user(inode->i_generation, (int __user *)arg);
940}
941
88b88a66
JK		 942static int f2fs_ioc_start_atomic_write(struct file *filp)
943{
944 struct inode *inode = file_inode(filp);
88b88a66
JK		 945
946 if (!inode_owner_or_capable(inode))
947 return -EACCES;
948
1e84371f
JK		 949 f2fs_balance_fs(F2FS_I_SB(inode));
950
951 if (f2fs_is_atomic_file(inode))
952 return 0;
88b88a66
JK		 953
954 set_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);
955
b3d208f9 956 return f2fs_convert_inline_inode(inode);
88b88a66
JK		 957}
958
959static int f2fs_ioc_commit_atomic_write(struct file *filp)
960{
961 struct inode *inode = file_inode(filp);
962 int ret;
963
964 if (!inode_owner_or_capable(inode))
965 return -EACCES;
966
02a1335f
JK		 967 if (f2fs_is_volatile_file(inode))
968 return 0;
969
88b88a66
JK		 970 ret = mnt_want_write_file(filp);
971 if (ret)
972 return ret;
973
974 if (f2fs_is_atomic_file(inode))
975 commit_inmem_pages(inode, false);
976
977 ret = f2fs_sync_file(filp, 0, LONG_MAX, 0);
978 mnt_drop_write_file(filp);
1e84371f 979 clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);
88b88a66
JK		 980 return ret;
981}
982
02a1335f
JK		 983static int f2fs_ioc_start_volatile_write(struct file *filp)
984{
985 struct inode *inode = file_inode(filp);
986
987 if (!inode_owner_or_capable(inode))
988 return -EACCES;
989
1e84371f
JK		 990 if (f2fs_is_volatile_file(inode))
991 return 0;
992
02a1335f 993 set_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE);
b3d208f9
JK		 994
995 return f2fs_convert_inline_inode(inode);
02a1335f
JK		 996}
997
1e84371f
JK		 998static int f2fs_ioc_release_volatile_write(struct file *filp)
999{
1000 struct inode *inode = file_inode(filp);
1001
1002 if (!inode_owner_or_capable(inode))
1003 return -EACCES;
1004
1005 if (!f2fs_is_volatile_file(inode))
1006 return 0;
1007
1008 punch_hole(inode, 0, F2FS_BLKSIZE);
1009 return 0;
1010}
1011
1012static int f2fs_ioc_abort_volatile_write(struct file *filp)
1013{
1014 struct inode *inode = file_inode(filp);
1015 int ret;
1016
1017 if (!inode_owner_or_capable(inode))
1018 return -EACCES;
1019
1020 ret = mnt_want_write_file(filp);
1021 if (ret)
1022 return ret;
1023
1024 f2fs_balance_fs(F2FS_I_SB(inode));
1025
1026 if (f2fs_is_atomic_file(inode)) {
1027 commit_inmem_pages(inode, false);
1028 clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);
1029 }
1030
1031 if (f2fs_is_volatile_file(inode)) {
1032 clear_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE);
1033 filemap_fdatawrite(inode->i_mapping);
1034 set_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE);
1035 }
1036 mnt_drop_write_file(filp);
1037 return ret;
1038}
1039
1abff93d
JK		 1040static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
1041{
1042 struct inode *inode = file_inode(filp);
1043 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1044 struct super_block *sb = sbi->sb;
1045 __u32 in;
1046
1047 if (!capable(CAP_SYS_ADMIN))
1048 return -EPERM;
1049
1050 if (get_user(in, (__u32 __user *)arg))
1051 return -EFAULT;
1052
1053 switch (in) {
1054 case F2FS_GOING_DOWN_FULLSYNC:
1055 sb = freeze_bdev(sb->s_bdev);
1056 if (sb && !IS_ERR(sb)) {
1057 f2fs_stop_checkpoint(sbi);
1058 thaw_bdev(sb->s_bdev, sb);
1059 }
1060 break;
1061 case F2FS_GOING_DOWN_METASYNC:
1062 /* do checkpoint only */
1063 f2fs_sync_fs(sb, 1);
1064 f2fs_stop_checkpoint(sbi);
1065 break;
1066 case F2FS_GOING_DOWN_NOSYNC:
1067 f2fs_stop_checkpoint(sbi);
1068 break;
1069 default:
1070 return -EINVAL;
1071 }
1072 return 0;
1073}
1074
52656e6c
JK		 1075static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg)
1076{
1077 struct inode *inode = file_inode(filp);
1078 struct super_block *sb = inode->i_sb;
1079 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1080 struct fstrim_range range;
1081 int ret;
4b2fecc8 1082
52656e6c
JK		 1083 if (!capable(CAP_SYS_ADMIN))
1084 return -EPERM;
4b2fecc8 1085
52656e6c
JK		 1086 if (!blk_queue_discard(q))
1087 return -EOPNOTSUPP;
4b2fecc8 1088
52656e6c
JK		 1089 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
1090 sizeof(range)))
1091 return -EFAULT;
4b2fecc8 1092
52656e6c
JK		 1093 range.minlen = max((unsigned int)range.minlen,
1094 q->limits.discard_granularity);
1095 ret = f2fs_trim_fs(F2FS_SB(sb), &range);
1096 if (ret < 0)
1097 return ret;
4b2fecc8 1098
52656e6c
JK		 1099 if (copy_to_user((struct fstrim_range __user *)arg, &range,
1100 sizeof(range)))
1101 return -EFAULT;
1102 return 0;
1103}
1104
1105long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1106{
1107 switch (cmd) {
1108 case F2FS_IOC_GETFLAGS:
1109 return f2fs_ioc_getflags(filp, arg);
1110 case F2FS_IOC_SETFLAGS:
1111 return f2fs_ioc_setflags(filp, arg);
d49f3e89
CY		 1112 case F2FS_IOC_GETVERSION:
1113 return f2fs_ioc_getversion(filp, arg);
88b88a66
JK		 1114 case F2FS_IOC_START_ATOMIC_WRITE:
1115 return f2fs_ioc_start_atomic_write(filp);
1116 case F2FS_IOC_COMMIT_ATOMIC_WRITE:
1117 return f2fs_ioc_commit_atomic_write(filp);
02a1335f
JK		 1118 case F2FS_IOC_START_VOLATILE_WRITE:
1119 return f2fs_ioc_start_volatile_write(filp);
1e84371f
JK		 1120 case F2FS_IOC_RELEASE_VOLATILE_WRITE:
1121 return f2fs_ioc_release_volatile_write(filp);
1122 case F2FS_IOC_ABORT_VOLATILE_WRITE:
1123 return f2fs_ioc_abort_volatile_write(filp);
1abff93d
JK		 1124 case F2FS_IOC_SHUTDOWN:
1125 return f2fs_ioc_shutdown(filp, arg);
52656e6c
JK		 1126 case FITRIM:
1127 return f2fs_ioc_fitrim(filp, arg);
fbfa2cc5
JK		 1128 default:
1129 return -ENOTTY;
1130 }
1131}
1132
e9750824
NJ		 1133#ifdef CONFIG_COMPAT
1134long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1135{
1136 switch (cmd) {
1137 case F2FS_IOC32_GETFLAGS:
1138 cmd = F2FS_IOC_GETFLAGS;
1139 break;
1140 case F2FS_IOC32_SETFLAGS:
1141 cmd = F2FS_IOC_SETFLAGS;
1142 break;
1143 default:
1144 return -ENOIOCTLCMD;
1145 }
1146 return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
1147}
1148#endif
1149
fbfa2cc5 1150const struct file_operations f2fs_file_operations = {
267378d4 1151 .llseek = f2fs_llseek,
aad4f8bb 1152 .read = new_sync_read,
8174202b 1153 .write = new_sync_write,
aad4f8bb 1154 .read_iter = generic_file_read_iter,
8174202b 1155 .write_iter = generic_file_write_iter,
fbfa2cc5 1156 .open = generic_file_open,
12662234 1157 .release = f2fs_release_file,
fbfa2cc5
JK		 1158 .mmap = f2fs_file_mmap,
1159 .fsync = f2fs_sync_file,
1160 .fallocate = f2fs_fallocate,
1161 .unlocked_ioctl = f2fs_ioctl,
e9750824
NJ		 1162#ifdef CONFIG_COMPAT
1163 .compat_ioctl = f2fs_compat_ioctl,
1164#endif
fbfa2cc5 1165 .splice_read = generic_file_splice_read,
8d020765 1166 .splice_write = iter_file_splice_write,
fbfa2cc5 1167};
Linux kernel - Deliverables
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