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f2fs: do not change the valid_block value if cur_valid_map was wrongly set or cleared
[GitHub/MotorolaMobilityLLC/kernel-slsi.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>
dc91de78 23#include <linux/uio.h>
8da4b8c4 24#include <linux/uuid.h>
4dd6f977 25#include <linux/file.h>
fbfa2cc5
JK		 26
27#include "f2fs.h"
28#include "node.h"
29#include "segment.h"
30#include "xattr.h"
31#include "acl.h"
c1c1b583 32#include "gc.h"
db9f7c1a 33#include "trace.h"
a2a4a7e4 34#include <trace/events/f2fs.h>
fbfa2cc5 35
5a3a2d83
QS		 36static int f2fs_filemap_fault(struct vm_fault *vmf)
37{
38 struct inode *inode = file_inode(vmf->vma->vm_file);
39 int err;
40
41 down_read(&F2FS_I(inode)->i_mmap_sem);
42 err = filemap_fault(vmf);
43 up_read(&F2FS_I(inode)->i_mmap_sem);
44
45 return err;
46}
47
11bac800 48static int f2fs_vm_page_mkwrite(struct vm_fault *vmf)
fbfa2cc5
JK		 49{
50 struct page *page = vmf->page;
11bac800 51 struct inode *inode = file_inode(vmf->vma->vm_file);
4081363f 52 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
fbfa2cc5 53 struct dnode_of_data dn;
e479556b 54 int err;
fbfa2cc5 55
fbfa2cc5 56 sb_start_pagefault(inode->i_sb);
b3d208f9
JK		 57
58 f2fs_bug_on(sbi, f2fs_has_inline_data(inode));
b067ba1f 59
fbfa2cc5 60 /* block allocation */
e479556b 61 f2fs_lock_op(sbi);
b3d208f9 62 set_new_dnode(&dn, inode, NULL, NULL, 0);
b600965c 63 err = f2fs_reserve_block(&dn, page->index);
9ba69cf9
JK		 64 if (err) {
65 f2fs_unlock_op(sbi);
b600965c 66 goto out;
9ba69cf9
JK		 67 }
68 f2fs_put_dnode(&dn);
69 f2fs_unlock_op(sbi);
fbfa2cc5 70
2c4db1a6 71 f2fs_balance_fs(sbi, dn.node_changed);
2a340760 72
11bac800 73 file_update_time(vmf->vma->vm_file);
5a3a2d83 74 down_read(&F2FS_I(inode)->i_mmap_sem);
fbfa2cc5 75 lock_page(page);
6bacf52f 76 if (unlikely(page->mapping != inode->i_mapping ||
9851e6e1 77 page_offset(page) > i_size_read(inode) ||
6bacf52f 78 !PageUptodate(page))) {
fbfa2cc5
JK		 79 unlock_page(page);
80 err = -EFAULT;
5a3a2d83 81 goto out_sem;
fbfa2cc5
JK		 82 }
83
84 /*
85 * check to see if the page is mapped already (no holes)
86 */
87 if (PageMappedToDisk(page))
9851e6e1 88 goto mapped;
fbfa2cc5
JK		 89
90 /* page is wholly or partially inside EOF */
09cbfeaf 91 if (((loff_t)(page->index + 1) << PAGE_SHIFT) >
9edcdabf 92 i_size_read(inode)) {
fbfa2cc5 93 unsigned offset;
09cbfeaf
KS		 94 offset = i_size_read(inode) & ~PAGE_MASK;
95 zero_user_segment(page, offset, PAGE_SIZE);
fbfa2cc5
JK		 96 }
97 set_page_dirty(page);
237c0790
JK		 98 if (!PageUptodate(page))
99 SetPageUptodate(page);
fbfa2cc5 100
e943a10d 101 trace_f2fs_vm_page_mkwrite(page, DATA);
9851e6e1
NJ		 102mapped:
103 /* fill the page */
fec1d657 104 f2fs_wait_on_page_writeback(page, DATA, false);
08b39fbd
CY		 105
106 /* wait for GCed encrypted page writeback */
107 if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode))
108 f2fs_wait_on_encrypted_page_writeback(sbi, dn.data_blkaddr);
109
5a3a2d83
QS		 110out_sem:
111 up_read(&F2FS_I(inode)->i_mmap_sem);
fbfa2cc5
JK		 112out:
113 sb_end_pagefault(inode->i_sb);
d0239e1b 114 f2fs_update_time(sbi, REQ_TIME);
fbfa2cc5
JK		 115 return block_page_mkwrite_return(err);
116}
117
118static const struct vm_operations_struct f2fs_file_vm_ops = {
5a3a2d83 119 .fault = f2fs_filemap_fault,
f1820361 120 .map_pages = filemap_map_pages,
692bb55d 121 .page_mkwrite = f2fs_vm_page_mkwrite,
fbfa2cc5
JK		 122};
123
354a3399
JK		 124static int get_parent_ino(struct inode *inode, nid_t *pino)
125{
126 struct dentry *dentry;
127
128 inode = igrab(inode);
129 dentry = d_find_any_alias(inode);
130 iput(inode);
131 if (!dentry)
132 return 0;
133
f0947e5c
JK		 134 *pino = parent_ino(dentry);
135 dput(dentry);
354a3399
JK		 136 return 1;
137}
138
9d1589ef
CY		 139static inline bool need_do_checkpoint(struct inode *inode)
140{
4081363f 141 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
9d1589ef
CY		 142 bool need_cp = false;
143
144 if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1)
145 need_cp = true;
bbf156f7 146 else if (is_sbi_flag_set(sbi, SBI_NEED_CP))
e7d55452 147 need_cp = true;
9d1589ef
CY		 148 else if (file_wrong_pino(inode))
149 need_cp = true;
150 else if (!space_for_roll_forward(sbi))
151 need_cp = true;
152 else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino))
153 need_cp = true;
d5053a34
JK		 154 else if (test_opt(sbi, FASTBOOT))
155 need_cp = true;
a344b9fd
JK		 156 else if (sbi->active_logs == 2)
157 need_cp = true;
9d1589ef
CY		 158
159 return need_cp;
160}
161
9c7bb702
CL		 162static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino)
163{
164 struct page *i = find_get_page(NODE_MAPPING(sbi), ino);
165 bool ret = false;
166 /* But we need to avoid that there are some inode updates */
167 if ((i && PageDirty(i)) || need_inode_block_update(sbi, ino))
168 ret = true;
169 f2fs_put_page(i, 0);
170 return ret;
171}
172
51455b19
CL		 173static void try_to_fix_pino(struct inode *inode)
174{
175 struct f2fs_inode_info *fi = F2FS_I(inode);
176 nid_t pino;
177
178 down_write(&fi->i_sem);
51455b19
CL		 179 if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
180 get_parent_ino(inode, &pino)) {
205b9822 181 f2fs_i_pino_write(inode, pino);
51455b19 182 file_got_pino(inode);
51455b19 183 }
ee6d182f 184 up_write(&fi->i_sem);
51455b19
CL		 185}
186
608514de
JK		 187static int f2fs_do_sync_file(struct file *file, loff_t start, loff_t end,
188 int datasync, bool atomic)
fbfa2cc5
JK		 189{
190 struct inode *inode = file->f_mapping->host;
4081363f 191 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2403c155 192 nid_t ino = inode->i_ino;
fbfa2cc5
JK		 193 int ret = 0;
194 bool need_cp = false;
195 struct writeback_control wbc = {
c81bf1c8 196 .sync_mode = WB_SYNC_ALL,
fbfa2cc5
JK		 197 .nr_to_write = LONG_MAX,
198 .for_reclaim = 0,
199 };
200
6bacf52f 201 if (unlikely(f2fs_readonly(inode->i_sb)))
1fa95b0b
NJ		 202 return 0;
203
a2a4a7e4 204 trace_f2fs_sync_file_enter(inode);
ea1aa12c
JK		 205
206 /* if fdatasync is triggered, let's do in-place-update */
c46a155b 207 if (datasync || get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks)
91942321 208 set_inode_flag(inode, FI_NEED_IPU);
fbfa2cc5 209 ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
91942321 210 clear_inode_flag(inode, FI_NEED_IPU);
c1ce1b02 211
a2a4a7e4
NJ		 212 if (ret) {
213 trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
fbfa2cc5 214 return ret;
a2a4a7e4 215 }
fbfa2cc5 216
9c7bb702 217 /* if the inode is dirty, let's recover all the time */
281518c6 218 if (!f2fs_skip_inode_update(inode, datasync)) {
2286c020 219 f2fs_write_inode(inode, NULL);
9c7bb702
CL		 220 goto go_write;
221 }
222
6d99ba41
JK		 223 /*
224 * if there is no written data, don't waste time to write recovery info.
225 */
91942321 226 if (!is_inode_flag_set(inode, FI_APPEND_WRITE) &&
2403c155 227 !exist_written_data(sbi, ino, APPEND_INO)) {
19c9c466 228
9c7bb702
CL		 229 /* it may call write_inode just prior to fsync */
230 if (need_inode_page_update(sbi, ino))
19c9c466 231 goto go_write;
19c9c466 232
91942321 233 if (is_inode_flag_set(inode, FI_UPDATE_WRITE) ||
2403c155 234 exist_written_data(sbi, ino, UPDATE_INO))
6d99ba41
JK		 235 goto flush_out;
236 goto out;
237 }
19c9c466 238go_write:
e5d2385e
JK		 239 /*
240 * Both of fdatasync() and fsync() are able to be recovered from
241 * sudden-power-off.
242 */
91942321 243 down_read(&F2FS_I(inode)->i_sem);
9d1589ef 244 need_cp = need_do_checkpoint(inode);
91942321 245 up_read(&F2FS_I(inode)->i_sem);
d928bfbf 246
fbfa2cc5
JK		 247 if (need_cp) {
248 /* all the dirty node pages should be flushed for POR */
249 ret = f2fs_sync_fs(inode->i_sb, 1);
d928bfbf 250
51455b19
CL		 251 /*
252 * We've secured consistency through sync_fs. Following pino
253 * will be used only for fsynced inodes after checkpoint.
254 */
255 try_to_fix_pino(inode);
91942321
JK		 256 clear_inode_flag(inode, FI_APPEND_WRITE);
257 clear_inode_flag(inode, FI_UPDATE_WRITE);
51455b19
CL		 258 goto out;
259 }
88bd02c9 260sync_nodes:
26de9b11 261 ret = fsync_node_pages(sbi, inode, &wbc, atomic);
c267ec15
JK		 262 if (ret)
263 goto out;
51455b19 264
871f599f 265 /* if cp_error was enabled, we should avoid infinite loop */
6d5a1495
CY		 266 if (unlikely(f2fs_cp_error(sbi))) {
267 ret = -EIO;
871f599f 268 goto out;
6d5a1495 269 }
871f599f 270
51455b19 271 if (need_inode_block_update(sbi, ino)) {
7c45729a 272 f2fs_mark_inode_dirty_sync(inode, true);
51455b19
CL		 273 f2fs_write_inode(inode, NULL);
274 goto sync_nodes;
fbfa2cc5 275 }
51455b19 276
b6a245eb
JK		 277 /*
278 * If it's atomic_write, it's just fine to keep write ordering. So
279 * here we don't need to wait for node write completion, since we use
280 * node chain which serializes node blocks. If one of node writes are
281 * reordered, we can see simply broken chain, resulting in stopping
282 * roll-forward recovery. It means we'll recover all or none node blocks
283 * given fsync mark.
284 */
285 if (!atomic) {
286 ret = wait_on_node_pages_writeback(sbi, ino);
287 if (ret)
288 goto out;
289 }
51455b19
CL		 290
291 /* once recovery info is written, don't need to tack this */
a49324f1 292 remove_ino_entry(sbi, ino, APPEND_INO);
91942321 293 clear_inode_flag(inode, FI_APPEND_WRITE);
51455b19 294flush_out:
a49324f1 295 remove_ino_entry(sbi, ino, UPDATE_INO);
91942321 296 clear_inode_flag(inode, FI_UPDATE_WRITE);
e7c75ab0
JK		 297 if (!atomic)
298 ret = f2fs_issue_flush(sbi);
d0239e1b 299 f2fs_update_time(sbi, REQ_TIME);
fbfa2cc5 300out:
a2a4a7e4 301 trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
05ca3632 302 f2fs_trace_ios(NULL, 1);
fbfa2cc5
JK		 303 return ret;
304}
305
608514de
JK		 306int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
307{
308 return f2fs_do_sync_file(file, start, end, datasync, false);
309}
310
7f7670fe
JK		 311static pgoff_t __get_first_dirty_index(struct address_space *mapping,
312 pgoff_t pgofs, int whence)
313{
314 struct pagevec pvec;
315 int nr_pages;
316
317 if (whence != SEEK_DATA)
318 return 0;
319
320 /* find first dirty page index */
321 pagevec_init(&pvec, 0);
65b85ccc
JK		 322 nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs,
323 PAGECACHE_TAG_DIRTY, 1);
80dd9c0e 324 pgofs = nr_pages ? pvec.pages[0]->index : ULONG_MAX;
7f7670fe
JK		 325 pagevec_release(&pvec);
326 return pgofs;
327}
328
329static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs,
330 int whence)
331{
332 switch (whence) {
333 case SEEK_DATA:
334 if ((blkaddr == NEW_ADDR && dirty == pgofs) ||
335 (blkaddr != NEW_ADDR && blkaddr != NULL_ADDR))
336 return true;
337 break;
338 case SEEK_HOLE:
339 if (blkaddr == NULL_ADDR)
340 return true;
341 break;
342 }
343 return false;
344}
345
267378d4
CY		 346static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
347{
348 struct inode *inode = file->f_mapping->host;
349 loff_t maxbytes = inode->i_sb->s_maxbytes;
350 struct dnode_of_data dn;
7f7670fe
JK		 351 pgoff_t pgofs, end_offset, dirty;
352 loff_t data_ofs = offset;
353 loff_t isize;
267378d4
CY		 354 int err = 0;
355
5955102c 356 inode_lock(inode);
267378d4
CY		 357
358 isize = i_size_read(inode);
359 if (offset >= isize)
360 goto fail;
361
362 /* handle inline data case */
622f28ae 363 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {
267378d4
CY		 364 if (whence == SEEK_HOLE)
365 data_ofs = isize;
366 goto found;
367 }
368
09cbfeaf 369 pgofs = (pgoff_t)(offset >> PAGE_SHIFT);
267378d4 370
7f7670fe
JK		 371 dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence);
372
09cbfeaf 373 for (; data_ofs < isize; data_ofs = (loff_t)pgofs << PAGE_SHIFT) {
267378d4 374 set_new_dnode(&dn, inode, NULL, NULL, 0);
ac6f1999 375 err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE);
267378d4
CY		 376 if (err && err != -ENOENT) {
377 goto fail;
378 } else if (err == -ENOENT) {
e1c42045 379 /* direct node does not exists */
267378d4 380 if (whence == SEEK_DATA) {
3cf45747 381 pgofs = get_next_page_offset(&dn, pgofs);
267378d4
CY		 382 continue;
383 } else {
384 goto found;
385 }
386 }
387
81ca7350 388 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
267378d4
CY		 389
390 /* find data/hole in dnode block */
391 for (; dn.ofs_in_node < end_offset;
392 dn.ofs_in_node++, pgofs++,
09cbfeaf 393 data_ofs = (loff_t)pgofs << PAGE_SHIFT) {
267378d4 394 block_t blkaddr;
7a2af766
CY		 395 blkaddr = datablock_addr(dn.inode,
396 dn.node_page, dn.ofs_in_node);
267378d4 397
7f7670fe 398 if (__found_offset(blkaddr, dirty, pgofs, whence)) {
267378d4
CY		 399 f2fs_put_dnode(&dn);
400 goto found;
401 }
402 }
403 f2fs_put_dnode(&dn);
404 }
405
406 if (whence == SEEK_DATA)
407 goto fail;
267378d4 408found:
fe369bc8
JK		 409 if (whence == SEEK_HOLE && data_ofs > isize)
410 data_ofs = isize;
5955102c 411 inode_unlock(inode);
267378d4
CY		 412 return vfs_setpos(file, data_ofs, maxbytes);
413fail:
5955102c 414 inode_unlock(inode);
267378d4
CY		 415 return -ENXIO;
416}
417
418static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence)
419{
420 struct inode *inode = file->f_mapping->host;
421 loff_t maxbytes = inode->i_sb->s_maxbytes;
422
423 switch (whence) {
424 case SEEK_SET:
425 case SEEK_CUR:
426 case SEEK_END:
427 return generic_file_llseek_size(file, offset, whence,
428 maxbytes, i_size_read(inode));
429 case SEEK_DATA:
430 case SEEK_HOLE:
0b4c5afd
JK		 431 if (offset < 0)
432 return -ENXIO;
267378d4
CY		 433 return f2fs_seek_block(file, offset, whence);
434 }
435
436 return -EINVAL;
437}
438
fbfa2cc5
JK		 439static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma)
440{
b3d208f9 441 struct inode *inode = file_inode(file);
b9d777b8 442 int err;
b3d208f9
JK		 443
444 /* we don't need to use inline_data strictly */
b9d777b8
JK		 445 err = f2fs_convert_inline_inode(inode);
446 if (err)
447 return err;
b3d208f9 448
fbfa2cc5
JK		 449 file_accessed(file);
450 vma->vm_ops = &f2fs_file_vm_ops;
451 return 0;
452}
453
fcc85a4d
JK		 454static int f2fs_file_open(struct inode *inode, struct file *filp)
455{
33b13951 456 struct dentry *dir;
fcc85a4d 457
0abd675e
CY		 458 if (f2fs_encrypted_inode(inode)) {
459 int ret = fscrypt_get_encryption_info(inode);
fcc85a4d 460 if (ret)
ae108668 461 return -EACCES;
0b81d077 462 if (!fscrypt_has_encryption_key(inode))
ae108668 463 return -ENOKEY;
fcc85a4d 464 }
33b13951
JK		 465 dir = dget_parent(file_dentry(filp));
466 if (f2fs_encrypted_inode(d_inode(dir)) &&
467 !fscrypt_has_permitted_context(d_inode(dir), inode)) {
468 dput(dir);
8074bb51 469 return -EPERM;
33b13951
JK		 470 }
471 dput(dir);
0abd675e 472 return dquot_file_open(inode, filp);
fcc85a4d
JK		 473}
474
b292dcab 475int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
fbfa2cc5 476{
4081363f 477 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
fbfa2cc5 478 struct f2fs_node *raw_node;
19b2c30d 479 int nr_free = 0, ofs = dn->ofs_in_node, len = count;
fbfa2cc5 480 __le32 *addr;
7a2af766
CY		 481 int base = 0;
482
483 if (IS_INODE(dn->node_page) && f2fs_has_extra_attr(dn->inode))
484 base = get_extra_isize(dn->inode);
fbfa2cc5 485
45590710 486 raw_node = F2FS_NODE(dn->node_page);
7a2af766 487 addr = blkaddr_in_node(raw_node) + base + ofs;
fbfa2cc5 488
6c311ec6 489 for (; count > 0; count--, addr++, dn->ofs_in_node++) {
fbfa2cc5
JK		 490 block_t blkaddr = le32_to_cpu(*addr);
491 if (blkaddr == NULL_ADDR)
492 continue;
493
e1509cf2 494 dn->data_blkaddr = NULL_ADDR;
216a620a 495 set_data_blkaddr(dn);
fbfa2cc5 496 invalidate_blocks(sbi, blkaddr);
3c6c2beb 497 if (dn->ofs_in_node == 0 && IS_INODE(dn->node_page))
91942321 498 clear_inode_flag(dn->inode, FI_FIRST_BLOCK_WRITTEN);
fbfa2cc5
JK		 499 nr_free++;
500 }
19b2c30d 501
fbfa2cc5 502 if (nr_free) {
19b2c30d
CY		 503 pgoff_t fofs;
504 /*
505 * once we invalidate valid blkaddr in range [ofs, ofs + count],
506 * we will invalidate all blkaddr in the whole range.
507 */
508 fofs = start_bidx_of_node(ofs_of_node(dn->node_page),
81ca7350 509 dn->inode) + ofs;
19b2c30d 510 f2fs_update_extent_cache_range(dn, fofs, 0, len);
d7cc950b 511 dec_valid_block_count(sbi, dn->inode, nr_free);
fbfa2cc5
JK		 512 }
513 dn->ofs_in_node = ofs;
51dd6249 514
d0239e1b 515 f2fs_update_time(sbi, REQ_TIME);
51dd6249
NJ		 516 trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
517 dn->ofs_in_node, nr_free);
fbfa2cc5
JK		 518 return nr_free;
519}
520
521void truncate_data_blocks(struct dnode_of_data *dn)
522{
523 truncate_data_blocks_range(dn, ADDRS_PER_BLOCK);
524}
525
0bfcfcca 526static int truncate_partial_data_page(struct inode *inode, u64 from,
43f3eae1 527 bool cache_only)
fbfa2cc5 528{
09cbfeaf
KS		 529 unsigned offset = from & (PAGE_SIZE - 1);
530 pgoff_t index = from >> PAGE_SHIFT;
43f3eae1 531 struct address_space *mapping = inode->i_mapping;
fbfa2cc5
JK		 532 struct page *page;
533
43f3eae1 534 if (!offset && !cache_only)
b3d208f9 535 return 0;
fbfa2cc5 536
43f3eae1 537 if (cache_only) {
34b5d5c2 538 page = find_lock_page(mapping, index);
43f3eae1
JK		 539 if (page && PageUptodate(page))
540 goto truncate_out;
541 f2fs_put_page(page, 1);
b3d208f9 542 return 0;
43f3eae1 543 }
fbfa2cc5 544
a56c7c6f 545 page = get_lock_data_page(inode, index, true);
43f3eae1 546 if (IS_ERR(page))
a78aaa2c 547 return PTR_ERR(page) == -ENOENT ? 0 : PTR_ERR(page);
43f3eae1 548truncate_out:
fec1d657 549 f2fs_wait_on_page_writeback(page, DATA, true);
09cbfeaf 550 zero_user(page, offset, PAGE_SIZE - offset);
a9bcf9bc
JK		 551
552 /* An encrypted inode should have a key and truncate the last page. */
553 f2fs_bug_on(F2FS_I_SB(inode), cache_only && f2fs_encrypted_inode(inode));
554 if (!cache_only)
0bfcfcca 555 set_page_dirty(page);
fbfa2cc5 556 f2fs_put_page(page, 1);
b3d208f9 557 return 0;
fbfa2cc5
JK		 558}
559
764aa3e9 560int truncate_blocks(struct inode *inode, u64 from, bool lock)
fbfa2cc5 561{
4081363f 562 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
fbfa2cc5
JK		 563 unsigned int blocksize = inode->i_sb->s_blocksize;
564 struct dnode_of_data dn;
565 pgoff_t free_from;
9ffe0fb5 566 int count = 0, err = 0;
b3d208f9 567 struct page *ipage;
0bfcfcca 568 bool truncate_page = false;
fbfa2cc5 569
51dd6249
NJ		 570 trace_f2fs_truncate_blocks_enter(inode, from);
571
f7ef9b83 572 free_from = (pgoff_t)F2FS_BYTES_TO_BLK(from + blocksize - 1);
fbfa2cc5 573
09210c97
CY		 574 if (free_from >= sbi->max_file_blocks)
575 goto free_partial;
576
764aa3e9
JK		 577 if (lock)
578 f2fs_lock_op(sbi);
9ffe0fb5 579
b3d208f9
JK		 580 ipage = get_node_page(sbi, inode->i_ino);
581 if (IS_ERR(ipage)) {
582 err = PTR_ERR(ipage);
583 goto out;
584 }
585
586 if (f2fs_has_inline_data(inode)) {
bd4667cb 587 truncate_inline_inode(inode, ipage, from);
b3d208f9 588 f2fs_put_page(ipage, 1);
0bfcfcca 589 truncate_page = true;
b3d208f9
JK		 590 goto out;
591 }
592
593 set_new_dnode(&dn, inode, ipage, NULL, 0);
79344efb 594 err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE_RA);
fbfa2cc5
JK		 595 if (err) {
596 if (err == -ENOENT)
597 goto free_next;
b3d208f9 598 goto out;
1ce86bf6
JK		 599 }
600
81ca7350 601 count = ADDRS_PER_PAGE(dn.node_page, inode);
fbfa2cc5
JK		 602
603 count -= dn.ofs_in_node;
9850cf4a 604 f2fs_bug_on(sbi, count < 0);
39936837 605
fbfa2cc5
JK		 606 if (dn.ofs_in_node || IS_INODE(dn.node_page)) {
607 truncate_data_blocks_range(&dn, count);
608 free_from += count;
609 }
610
611 f2fs_put_dnode(&dn);
612free_next:
613 err = truncate_inode_blocks(inode, free_from);
764d2c80
JK		 614out:
615 if (lock)
616 f2fs_unlock_op(sbi);
09210c97 617free_partial:
b3d208f9
JK		 618 /* lastly zero out the first data page */
619 if (!err)
0bfcfcca 620 err = truncate_partial_data_page(inode, from, truncate_page);
fbfa2cc5 621
51dd6249 622 trace_f2fs_truncate_blocks_exit(inode, err);
fbfa2cc5
JK		 623 return err;
624}
625
9a449e9c 626int f2fs_truncate(struct inode *inode)
fbfa2cc5 627{
b0154891
CY		 628 int err;
629
fbfa2cc5
JK		 630 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
631 S_ISLNK(inode->i_mode)))
b0154891 632 return 0;
fbfa2cc5 633
51dd6249
NJ		 634 trace_f2fs_truncate(inode);
635
14b44d23
JK		 636#ifdef CONFIG_F2FS_FAULT_INJECTION
637 if (time_to_inject(F2FS_I_SB(inode), FAULT_TRUNCATE)) {
638 f2fs_show_injection_info(FAULT_TRUNCATE);
639 return -EIO;
640 }
641#endif
92dffd01 642 /* we should check inline_data size */
b9d777b8 643 if (!f2fs_may_inline_data(inode)) {
b0154891
CY		 644 err = f2fs_convert_inline_inode(inode);
645 if (err)
646 return err;
92dffd01
JK		 647 }
648
9a449e9c 649 err = truncate_blocks(inode, i_size_read(inode), true);
b0154891
CY		 650 if (err)
651 return err;
652
078cd827 653 inode->i_mtime = inode->i_ctime = current_time(inode);
7c45729a 654 f2fs_mark_inode_dirty_sync(inode, false);
b0154891 655 return 0;
fbfa2cc5
JK		 656}
657
a528d35e 658int f2fs_getattr(const struct path *path, struct kstat *stat,
1c6d8ee4 659 u32 request_mask, unsigned int query_flags)
fbfa2cc5 660{
a528d35e 661 struct inode *inode = d_inode(path->dentry);
1c6d8ee4
CY		 662 struct f2fs_inode_info *fi = F2FS_I(inode);
663 unsigned int flags;
664
2c1d0305 665 flags = fi->i_flags & (FS_FL_USER_VISIBLE | FS_PROJINHERIT_FL);
1c6d8ee4
CY		 666 if (flags & FS_APPEND_FL)
667 stat->attributes |= STATX_ATTR_APPEND;
668 if (flags & FS_COMPR_FL)
669 stat->attributes |= STATX_ATTR_COMPRESSED;
670 if (f2fs_encrypted_inode(inode))
671 stat->attributes |= STATX_ATTR_ENCRYPTED;
672 if (flags & FS_IMMUTABLE_FL)
673 stat->attributes |= STATX_ATTR_IMMUTABLE;
674 if (flags & FS_NODUMP_FL)
675 stat->attributes |= STATX_ATTR_NODUMP;
676
677 stat->attributes_mask |= (STATX_ATTR_APPEND |
678 STATX_ATTR_COMPRESSED |
679 STATX_ATTR_ENCRYPTED |
680 STATX_ATTR_IMMUTABLE |
681 STATX_ATTR_NODUMP);
682
fbfa2cc5 683 generic_fillattr(inode, stat);
fbfa2cc5
JK		 684 return 0;
685}
686
687#ifdef CONFIG_F2FS_FS_POSIX_ACL
688static void __setattr_copy(struct inode *inode, const struct iattr *attr)
689{
fbfa2cc5
JK		 690 unsigned int ia_valid = attr->ia_valid;
691
692 if (ia_valid & ATTR_UID)
693 inode->i_uid = attr->ia_uid;
694 if (ia_valid & ATTR_GID)
695 inode->i_gid = attr->ia_gid;
696 if (ia_valid & ATTR_ATIME)
697 inode->i_atime = timespec_trunc(attr->ia_atime,
698 inode->i_sb->s_time_gran);
699 if (ia_valid & ATTR_MTIME)
700 inode->i_mtime = timespec_trunc(attr->ia_mtime,
701 inode->i_sb->s_time_gran);
702 if (ia_valid & ATTR_CTIME)
703 inode->i_ctime = timespec_trunc(attr->ia_ctime,
704 inode->i_sb->s_time_gran);
705 if (ia_valid & ATTR_MODE) {
706 umode_t mode = attr->ia_mode;
707
708 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
709 mode &= ~S_ISGID;
91942321 710 set_acl_inode(inode, mode);
fbfa2cc5
JK		 711 }
712}
713#else
714#define __setattr_copy setattr_copy
715#endif
716
717int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
718{
2b0143b5 719 struct inode *inode = d_inode(dentry);
fbfa2cc5 720 int err;
c0ed4405 721 bool size_changed = false;
fbfa2cc5 722
31051c85 723 err = setattr_prepare(dentry, attr);
fbfa2cc5
JK		 724 if (err)
725 return err;
726
0abd675e
CY		 727 if (is_quota_modification(inode, attr)) {
728 err = dquot_initialize(inode);
729 if (err)
730 return err;
731 }
732 if ((attr->ia_valid & ATTR_UID &&
733 !uid_eq(attr->ia_uid, inode->i_uid)) ||
734 (attr->ia_valid & ATTR_GID &&
735 !gid_eq(attr->ia_gid, inode->i_gid))) {
736 err = dquot_transfer(inode, attr);
737 if (err)
738 return err;
739 }
740
09db6a2e 741 if (attr->ia_valid & ATTR_SIZE) {
67773a1f
EB		 742 if (f2fs_encrypted_inode(inode)) {
743 err = fscrypt_get_encryption_info(inode);
744 if (err)
745 return err;
746 if (!fscrypt_has_encryption_key(inode))
747 return -ENOKEY;
748 }
fcc85a4d 749
3c454145 750 if (attr->ia_size <= i_size_read(inode)) {
5a3a2d83 751 down_write(&F2FS_I(inode)->i_mmap_sem);
09db6a2e 752 truncate_setsize(inode, attr->ia_size);
9a449e9c 753 err = f2fs_truncate(inode);
5a3a2d83 754 up_write(&F2FS_I(inode)->i_mmap_sem);
b0154891
CY		 755 if (err)
756 return err;
09db6a2e
CY		 757 } else {
758 /*
3c454145
CY		 759 * do not trim all blocks after i_size if target size is
760 * larger than i_size.
09db6a2e 761 */
5a3a2d83 762 down_write(&F2FS_I(inode)->i_mmap_sem);
3c454145 763 truncate_setsize(inode, attr->ia_size);
5a3a2d83 764 up_write(&F2FS_I(inode)->i_mmap_sem);
0cab80ee
CY		 765
766 /* should convert inline inode here */
b9d777b8 767 if (!f2fs_may_inline_data(inode)) {
0cab80ee
CY		 768 err = f2fs_convert_inline_inode(inode);
769 if (err)
770 return err;
771 }
078cd827 772 inode->i_mtime = inode->i_ctime = current_time(inode);
09db6a2e 773 }
c0ed4405
YH		 774
775 size_changed = true;
fbfa2cc5
JK		 776 }
777
778 __setattr_copy(inode, attr);
779
780 if (attr->ia_valid & ATTR_MODE) {
a6dda0e6 781 err = posix_acl_chmod(inode, get_inode_mode(inode));
91942321
JK		 782 if (err || is_inode_flag_set(inode, FI_ACL_MODE)) {
783 inode->i_mode = F2FS_I(inode)->i_acl_mode;
784 clear_inode_flag(inode, FI_ACL_MODE);
fbfa2cc5
JK		 785 }
786 }
787
c0ed4405
YH		 788 /* file size may changed here */
789 f2fs_mark_inode_dirty_sync(inode, size_changed);
15d04354
JK		 790
791 /* inode change will produce dirty node pages flushed by checkpoint */
792 f2fs_balance_fs(F2FS_I_SB(inode), true);
793
fbfa2cc5
JK		 794 return err;
795}
796
797const struct inode_operations f2fs_file_inode_operations = {
798 .getattr = f2fs_getattr,
799 .setattr = f2fs_setattr,
800 .get_acl = f2fs_get_acl,
a6dda0e6 801 .set_acl = f2fs_set_acl,
fbfa2cc5 802#ifdef CONFIG_F2FS_FS_XATTR
fbfa2cc5 803 .listxattr = f2fs_listxattr,
fbfa2cc5 804#endif
9ab70134 805 .fiemap = f2fs_fiemap,
fbfa2cc5
JK		 806};
807
6394328a 808static int fill_zero(struct inode *inode, pgoff_t index,
fbfa2cc5
JK		 809 loff_t start, loff_t len)
810{
4081363f 811 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
fbfa2cc5
JK		 812 struct page *page;
813
814 if (!len)
6394328a 815 return 0;
fbfa2cc5 816
2c4db1a6 817 f2fs_balance_fs(sbi, true);
bd43df02 818
e479556b 819 f2fs_lock_op(sbi);
64aa7ed9 820 page = get_new_data_page(inode, NULL, index, false);
e479556b 821 f2fs_unlock_op(sbi);
fbfa2cc5 822
6394328a
CY		 823 if (IS_ERR(page))
824 return PTR_ERR(page);
825
fec1d657 826 f2fs_wait_on_page_writeback(page, DATA, true);
6394328a
CY		 827 zero_user(page, start, len);
828 set_page_dirty(page);
829 f2fs_put_page(page, 1);
830 return 0;
fbfa2cc5
JK		 831}
832
833int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
834{
fbfa2cc5
JK		 835 int err;
836
ea58711e 837 while (pg_start < pg_end) {
fbfa2cc5 838 struct dnode_of_data dn;
ea58711e 839 pgoff_t end_offset, count;
9eaeba70 840
fbfa2cc5 841 set_new_dnode(&dn, inode, NULL, NULL, 0);
ea58711e 842 err = get_dnode_of_data(&dn, pg_start, LOOKUP_NODE);
fbfa2cc5 843 if (err) {
ea58711e
CY		 844 if (err == -ENOENT) {
845 pg_start++;
fbfa2cc5 846 continue;
ea58711e 847 }
fbfa2cc5
JK		 848 return err;
849 }
850
81ca7350 851 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
ea58711e
CY		 852 count = min(end_offset - dn.ofs_in_node, pg_end - pg_start);
853
854 f2fs_bug_on(F2FS_I_SB(inode), count == 0 || count > end_offset);
855
856 truncate_data_blocks_range(&dn, count);
fbfa2cc5 857 f2fs_put_dnode(&dn);
ea58711e
CY		 858
859 pg_start += count;
fbfa2cc5
JK		 860 }
861 return 0;
862}
863
a66c7b2f 864static int punch_hole(struct inode *inode, loff_t offset, loff_t len)
fbfa2cc5
JK		 865{
866 pgoff_t pg_start, pg_end;
867 loff_t off_start, off_end;
b9d777b8 868 int ret;
fbfa2cc5 869
b9d777b8
JK		 870 ret = f2fs_convert_inline_inode(inode);
871 if (ret)
872 return ret;
9ffe0fb5 873
09cbfeaf
KS		 874 pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
875 pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
fbfa2cc5 876
09cbfeaf
KS		 877 off_start = offset & (PAGE_SIZE - 1);
878 off_end = (offset + len) & (PAGE_SIZE - 1);
fbfa2cc5
JK		 879
880 if (pg_start == pg_end) {
6394328a 881 ret = fill_zero(inode, pg_start, off_start,
fbfa2cc5 882 off_end - off_start);
6394328a
CY		 883 if (ret)
884 return ret;
fbfa2cc5 885 } else {
6394328a
CY		 886 if (off_start) {
887 ret = fill_zero(inode, pg_start++, off_start,
09cbfeaf 888 PAGE_SIZE - off_start);
6394328a
CY		 889 if (ret)
890 return ret;
891 }
892 if (off_end) {
893 ret = fill_zero(inode, pg_end, 0, off_end);
894 if (ret)
895 return ret;
896 }
fbfa2cc5
JK		 897
898 if (pg_start < pg_end) {
899 struct address_space *mapping = inode->i_mapping;
900 loff_t blk_start, blk_end;
4081363f 901 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1127a3d4 902
2c4db1a6 903 f2fs_balance_fs(sbi, true);
fbfa2cc5 904
09cbfeaf
KS		 905 blk_start = (loff_t)pg_start << PAGE_SHIFT;
906 blk_end = (loff_t)pg_end << PAGE_SHIFT;
5a3a2d83 907 down_write(&F2FS_I(inode)->i_mmap_sem);
fbfa2cc5
JK		 908 truncate_inode_pages_range(mapping, blk_start,
909 blk_end - 1);
39936837 910
e479556b 911 f2fs_lock_op(sbi);
fbfa2cc5 912 ret = truncate_hole(inode, pg_start, pg_end);
e479556b 913 f2fs_unlock_op(sbi);
5a3a2d83 914 up_write(&F2FS_I(inode)->i_mmap_sem);
fbfa2cc5
JK		 915 }
916 }
917
fbfa2cc5
JK		 918 return ret;
919}
920
0a2aa8fb
JK		 921static int __read_out_blkaddrs(struct inode *inode, block_t *blkaddr,
922 int *do_replace, pgoff_t off, pgoff_t len)
b4ace337
CY		 923{
924 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
925 struct dnode_of_data dn;
0a2aa8fb 926 int ret, done, i;
ecbaa406 927
0a2aa8fb 928next_dnode:
6e2c64ad 929 set_new_dnode(&dn, inode, NULL, NULL, 0);
0a2aa8fb 930 ret = get_dnode_of_data(&dn, off, LOOKUP_NODE_RA);
6e2c64ad
JK		 931 if (ret && ret != -ENOENT) {
932 return ret;
933 } else if (ret == -ENOENT) {
0a2aa8fb
JK		 934 if (dn.max_level == 0)
935 return -ENOENT;
936 done = min((pgoff_t)ADDRS_PER_BLOCK - dn.ofs_in_node, len);
937 blkaddr += done;
938 do_replace += done;
939 goto next;
940 }
941
942 done = min((pgoff_t)ADDRS_PER_PAGE(dn.node_page, inode) -
943 dn.ofs_in_node, len);
944 for (i = 0; i < done; i++, blkaddr++, do_replace++, dn.ofs_in_node++) {
7a2af766
CY		 945 *blkaddr = datablock_addr(dn.inode,
946 dn.node_page, dn.ofs_in_node);
0a2aa8fb
JK		 947 if (!is_checkpointed_data(sbi, *blkaddr)) {
948
949 if (test_opt(sbi, LFS)) {
950 f2fs_put_dnode(&dn);
951 return -ENOTSUPP;
952 }
953
6e2c64ad 954 /* do not invalidate this block address */
f28b3434 955 f2fs_update_data_blkaddr(&dn, NULL_ADDR);
0a2aa8fb 956 *do_replace = 1;
b4ace337 957 }
6e2c64ad 958 }
0a2aa8fb
JK		 959 f2fs_put_dnode(&dn);
960next:
961 len -= done;
962 off += done;
963 if (len)
964 goto next_dnode;
965 return 0;
966}
b4ace337 967
0a2aa8fb
JK		 968static int __roll_back_blkaddrs(struct inode *inode, block_t *blkaddr,
969 int *do_replace, pgoff_t off, int len)
970{
971 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
972 struct dnode_of_data dn;
973 int ret, i;
b4ace337 974
0a2aa8fb
JK		 975 for (i = 0; i < len; i++, do_replace++, blkaddr++) {
976 if (*do_replace == 0)
977 continue;
b4ace337 978
0a2aa8fb
JK		 979 set_new_dnode(&dn, inode, NULL, NULL, 0);
980 ret = get_dnode_of_data(&dn, off + i, LOOKUP_NODE_RA);
981 if (ret) {
982 dec_valid_block_count(sbi, inode, 1);
983 invalidate_blocks(sbi, *blkaddr);
984 } else {
985 f2fs_update_data_blkaddr(&dn, *blkaddr);
36abef4e 986 }
0a2aa8fb
JK		 987 f2fs_put_dnode(&dn);
988 }
989 return 0;
990}
991
992static int __clone_blkaddrs(struct inode *src_inode, struct inode *dst_inode,
993 block_t *blkaddr, int *do_replace,
994 pgoff_t src, pgoff_t dst, pgoff_t len, bool full)
995{
996 struct f2fs_sb_info *sbi = F2FS_I_SB(src_inode);
997 pgoff_t i = 0;
998 int ret;
36abef4e 999
0a2aa8fb
JK		 1000 while (i < len) {
1001 if (blkaddr[i] == NULL_ADDR && !full) {
1002 i++;
1003 continue;
6e2c64ad 1004 }
b4ace337 1005
0a2aa8fb
JK		 1006 if (do_replace[i] || blkaddr[i] == NULL_ADDR) {
1007 struct dnode_of_data dn;
1008 struct node_info ni;
1009 size_t new_size;
1010 pgoff_t ilen;
b4ace337 1011
0a2aa8fb
JK		 1012 set_new_dnode(&dn, dst_inode, NULL, NULL, 0);
1013 ret = get_dnode_of_data(&dn, dst + i, ALLOC_NODE);
1014 if (ret)
1015 return ret;
b4ace337 1016
0a2aa8fb
JK		 1017 get_node_info(sbi, dn.nid, &ni);
1018 ilen = min((pgoff_t)
1019 ADDRS_PER_PAGE(dn.node_page, dst_inode) -
1020 dn.ofs_in_node, len - i);
1021 do {
7a2af766
CY		 1022 dn.data_blkaddr = datablock_addr(dn.inode,
1023 dn.node_page, dn.ofs_in_node);
0a2aa8fb
JK		 1024 truncate_data_blocks_range(&dn, 1);
1025
1026 if (do_replace[i]) {
1027 f2fs_i_blocks_write(src_inode,
0abd675e 1028 1, false, false);
0a2aa8fb 1029 f2fs_i_blocks_write(dst_inode,
0abd675e 1030 1, true, false);
0a2aa8fb
JK		 1031 f2fs_replace_block(sbi, &dn, dn.data_blkaddr,
1032 blkaddr[i], ni.version, true, false);
1033
1034 do_replace[i] = 0;
1035 }
1036 dn.ofs_in_node++;
1037 i++;
1038 new_size = (dst + i) << PAGE_SHIFT;
1039 if (dst_inode->i_size < new_size)
1040 f2fs_i_size_write(dst_inode, new_size);
e87f7329 1041 } while (--ilen && (do_replace[i] || blkaddr[i] == NULL_ADDR));
6e2c64ad 1042
0a2aa8fb
JK		 1043 f2fs_put_dnode(&dn);
1044 } else {
1045 struct page *psrc, *pdst;
1046
1047 psrc = get_lock_data_page(src_inode, src + i, true);
1048 if (IS_ERR(psrc))
1049 return PTR_ERR(psrc);
1050 pdst = get_new_data_page(dst_inode, NULL, dst + i,
1051 true);
1052 if (IS_ERR(pdst)) {
1053 f2fs_put_page(psrc, 1);
1054 return PTR_ERR(pdst);
1055 }
1056 f2fs_copy_page(psrc, pdst);
1057 set_page_dirty(pdst);
1058 f2fs_put_page(pdst, 1);
6e2c64ad 1059 f2fs_put_page(psrc, 1);
b4ace337 1060
0a2aa8fb
JK		 1061 ret = truncate_hole(src_inode, src + i, src + i + 1);
1062 if (ret)
1063 return ret;
1064 i++;
1065 }
6e2c64ad
JK		 1066 }
1067 return 0;
0a2aa8fb 1068}
b4ace337 1069
0a2aa8fb
JK		 1070static int __exchange_data_block(struct inode *src_inode,
1071 struct inode *dst_inode, pgoff_t src, pgoff_t dst,
363cad7f 1072 pgoff_t len, bool full)
0a2aa8fb
JK		 1073{
1074 block_t *src_blkaddr;
1075 int *do_replace;
363cad7f 1076 pgoff_t olen;
0a2aa8fb
JK		 1077 int ret;
1078
363cad7f
JK		 1079 while (len) {
1080 olen = min((pgoff_t)4 * ADDRS_PER_BLOCK, len);
0a2aa8fb 1081
a7c3e901 1082 src_blkaddr = kvzalloc(sizeof(block_t) * olen, GFP_KERNEL);
363cad7f
JK		 1083 if (!src_blkaddr)
1084 return -ENOMEM;
0a2aa8fb 1085
a7c3e901 1086 do_replace = kvzalloc(sizeof(int) * olen, GFP_KERNEL);
363cad7f
JK		 1087 if (!do_replace) {
1088 kvfree(src_blkaddr);
1089 return -ENOMEM;
1090 }
0a2aa8fb 1091
363cad7f
JK		 1092 ret = __read_out_blkaddrs(src_inode, src_blkaddr,
1093 do_replace, src, olen);
1094 if (ret)
1095 goto roll_back;
0a2aa8fb 1096
363cad7f
JK		 1097 ret = __clone_blkaddrs(src_inode, dst_inode, src_blkaddr,
1098 do_replace, src, dst, olen, full);
1099 if (ret)
1100 goto roll_back;
1101
1102 src += olen;
1103 dst += olen;
1104 len -= olen;
1105
1106 kvfree(src_blkaddr);
1107 kvfree(do_replace);
1108 }
0a2aa8fb
JK		 1109 return 0;
1110
1111roll_back:
1112 __roll_back_blkaddrs(src_inode, src_blkaddr, do_replace, src, len);
1113 kvfree(src_blkaddr);
1114 kvfree(do_replace);
6e2c64ad
JK		 1115 return ret;
1116}
b4ace337 1117
6e2c64ad
JK		 1118static int f2fs_do_collapse(struct inode *inode, pgoff_t start, pgoff_t end)
1119{
1120 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1121 pgoff_t nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE;
0a2aa8fb 1122 int ret;
6e2c64ad 1123
0a2aa8fb
JK		 1124 f2fs_balance_fs(sbi, true);
1125 f2fs_lock_op(sbi);
5f281fab
JK		 1126
1127 f2fs_drop_extent_tree(inode);
1128
0a2aa8fb
JK		 1129 ret = __exchange_data_block(inode, inode, end, start, nrpages - end, true);
1130 f2fs_unlock_op(sbi);
b4ace337
CY		 1131 return ret;
1132}
1133
1134static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len)
1135{
1136 pgoff_t pg_start, pg_end;
1137 loff_t new_size;
1138 int ret;
1139
b4ace337
CY		 1140 if (offset + len >= i_size_read(inode))
1141 return -EINVAL;
1142
1143 /* collapse range should be aligned to block size of f2fs. */
1144 if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))
1145 return -EINVAL;
1146
b9d777b8
JK		 1147 ret = f2fs_convert_inline_inode(inode);
1148 if (ret)
1149 return ret;
97a7b2c2 1150
09cbfeaf
KS		 1151 pg_start = offset >> PAGE_SHIFT;
1152 pg_end = (offset + len) >> PAGE_SHIFT;
b4ace337 1153
5a3a2d83 1154 down_write(&F2FS_I(inode)->i_mmap_sem);
b4ace337
CY		 1155 /* write out all dirty pages from offset */
1156 ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1157 if (ret)
5a3a2d83 1158 goto out;
b4ace337
CY		 1159
1160 truncate_pagecache(inode, offset);
1161
1162 ret = f2fs_do_collapse(inode, pg_start, pg_end);
1163 if (ret)
5a3a2d83 1164 goto out;
b4ace337 1165
6e2c64ad
JK		 1166 /* write out all moved pages, if possible */
1167 filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1168 truncate_pagecache(inode, offset);
1169
b4ace337 1170 new_size = i_size_read(inode) - len;
6e2c64ad 1171 truncate_pagecache(inode, new_size);
b4ace337
CY		 1172
1173 ret = truncate_blocks(inode, new_size, true);
1174 if (!ret)
fc9581c8 1175 f2fs_i_size_write(inode, new_size);
b4ace337 1176
5a3a2d83
QS		 1177out:
1178 up_write(&F2FS_I(inode)->i_mmap_sem);
b4ace337
CY		 1179 return ret;
1180}
1181
6e961949
CY		 1182static int f2fs_do_zero_range(struct dnode_of_data *dn, pgoff_t start,
1183 pgoff_t end)
1184{
1185 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
1186 pgoff_t index = start;
1187 unsigned int ofs_in_node = dn->ofs_in_node;
1188 blkcnt_t count = 0;
1189 int ret;
1190
1191 for (; index < end; index++, dn->ofs_in_node++) {
7a2af766
CY		 1192 if (datablock_addr(dn->inode, dn->node_page,
1193 dn->ofs_in_node) == NULL_ADDR)
6e961949
CY		 1194 count++;
1195 }
1196
1197 dn->ofs_in_node = ofs_in_node;
1198 ret = reserve_new_blocks(dn, count);
1199 if (ret)
1200 return ret;
1201
1202 dn->ofs_in_node = ofs_in_node;
1203 for (index = start; index < end; index++, dn->ofs_in_node++) {
7a2af766
CY		 1204 dn->data_blkaddr = datablock_addr(dn->inode,
1205 dn->node_page, dn->ofs_in_node);
6e961949
CY		 1206 /*
1207 * reserve_new_blocks will not guarantee entire block
1208 * allocation.
1209 */
1210 if (dn->data_blkaddr == NULL_ADDR) {
1211 ret = -ENOSPC;
1212 break;
1213 }
1214 if (dn->data_blkaddr != NEW_ADDR) {
1215 invalidate_blocks(sbi, dn->data_blkaddr);
1216 dn->data_blkaddr = NEW_ADDR;
1217 set_data_blkaddr(dn);
1218 }
1219 }
1220
1221 f2fs_update_extent_cache_range(dn, start, 0, index - start);
1222
1223 return ret;
1224}
1225
75cd4e09
CY		 1226static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len,
1227 int mode)
1228{
1229 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1230 struct address_space *mapping = inode->i_mapping;
1231 pgoff_t index, pg_start, pg_end;
1232 loff_t new_size = i_size_read(inode);
1233 loff_t off_start, off_end;
1234 int ret = 0;
1235
75cd4e09
CY		 1236 ret = inode_newsize_ok(inode, (len + offset));
1237 if (ret)
1238 return ret;
1239
b9d777b8
JK		 1240 ret = f2fs_convert_inline_inode(inode);
1241 if (ret)
1242 return ret;
75cd4e09 1243
5a3a2d83 1244 down_write(&F2FS_I(inode)->i_mmap_sem);
75cd4e09
CY		 1245 ret = filemap_write_and_wait_range(mapping, offset, offset + len - 1);
1246 if (ret)
5a3a2d83 1247 goto out_sem;
75cd4e09
CY		 1248
1249 truncate_pagecache_range(inode, offset, offset + len - 1);
1250
09cbfeaf
KS		 1251 pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
1252 pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
75cd4e09 1253
09cbfeaf
KS		 1254 off_start = offset & (PAGE_SIZE - 1);
1255 off_end = (offset + len) & (PAGE_SIZE - 1);
75cd4e09
CY		 1256
1257 if (pg_start == pg_end) {
6394328a
CY		 1258 ret = fill_zero(inode, pg_start, off_start,
1259 off_end - off_start);
1260 if (ret)
5a3a2d83 1261 goto out_sem;
6394328a 1262
75cd4e09
CY		 1263 new_size = max_t(loff_t, new_size, offset + len);
1264 } else {
1265 if (off_start) {
6394328a 1266 ret = fill_zero(inode, pg_start++, off_start,
09cbfeaf 1267 PAGE_SIZE - off_start);
6394328a 1268 if (ret)
5a3a2d83 1269 goto out_sem;
6394328a 1270
75cd4e09 1271 new_size = max_t(loff_t, new_size,
09cbfeaf 1272 (loff_t)pg_start << PAGE_SHIFT);
75cd4e09
CY		 1273 }
1274
6e961949 1275 for (index = pg_start; index < pg_end;) {
75cd4e09 1276 struct dnode_of_data dn;
6e961949
CY		 1277 unsigned int end_offset;
1278 pgoff_t end;
75cd4e09
CY		 1279
1280 f2fs_lock_op(sbi);
1281
6e961949
CY		 1282 set_new_dnode(&dn, inode, NULL, NULL, 0);
1283 ret = get_dnode_of_data(&dn, index, ALLOC_NODE);
75cd4e09
CY		 1284 if (ret) {
1285 f2fs_unlock_op(sbi);
1286 goto out;
1287 }
1288
6e961949
CY		 1289 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
1290 end = min(pg_end, end_offset - dn.ofs_in_node + index);
1291
1292 ret = f2fs_do_zero_range(&dn, index, end);
75cd4e09
CY		 1293 f2fs_put_dnode(&dn);
1294 f2fs_unlock_op(sbi);
9434fcde
CY		 1295
1296 f2fs_balance_fs(sbi, dn.node_changed);
1297
6e961949
CY		 1298 if (ret)
1299 goto out;
75cd4e09 1300
6e961949 1301 index = end;
75cd4e09 1302 new_size = max_t(loff_t, new_size,
6e961949 1303 (loff_t)index << PAGE_SHIFT);
75cd4e09
CY		 1304 }
1305
1306 if (off_end) {
6394328a
CY		 1307 ret = fill_zero(inode, pg_end, 0, off_end);
1308 if (ret)
1309 goto out;
1310
75cd4e09
CY		 1311 new_size = max_t(loff_t, new_size, offset + len);
1312 }
1313 }
1314
1315out:
ee6d182f 1316 if (!(mode & FALLOC_FL_KEEP_SIZE) && i_size_read(inode) < new_size)
fc9581c8 1317 f2fs_i_size_write(inode, new_size);
5a3a2d83
QS		 1318out_sem:
1319 up_write(&F2FS_I(inode)->i_mmap_sem);
75cd4e09
CY		 1320
1321 return ret;
1322}
1323
f62185d0
CY		 1324static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len)
1325{
1326 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
0a2aa8fb 1327 pgoff_t nr, pg_start, pg_end, delta, idx;
f62185d0 1328 loff_t new_size;
6e2c64ad 1329 int ret = 0;
f62185d0 1330
f62185d0 1331 new_size = i_size_read(inode) + len;
46e82fb1
KM		 1332 ret = inode_newsize_ok(inode, new_size);
1333 if (ret)
1334 return ret;
f62185d0
CY		 1335
1336 if (offset >= i_size_read(inode))
1337 return -EINVAL;
1338
1339 /* insert range should be aligned to block size of f2fs. */
1340 if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))
1341 return -EINVAL;
1342
b9d777b8
JK		 1343 ret = f2fs_convert_inline_inode(inode);
1344 if (ret)
1345 return ret;
97a7b2c2 1346
2c4db1a6 1347 f2fs_balance_fs(sbi, true);
2a340760 1348
5a3a2d83 1349 down_write(&F2FS_I(inode)->i_mmap_sem);
f62185d0
CY		 1350 ret = truncate_blocks(inode, i_size_read(inode), true);
1351 if (ret)
5a3a2d83 1352 goto out;
f62185d0
CY		 1353
1354 /* write out all dirty pages from offset */
1355 ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1356 if (ret)
5a3a2d83 1357 goto out;
f62185d0
CY		 1358
1359 truncate_pagecache(inode, offset);
1360
09cbfeaf
KS		 1361 pg_start = offset >> PAGE_SHIFT;
1362 pg_end = (offset + len) >> PAGE_SHIFT;
f62185d0 1363 delta = pg_end - pg_start;
0a2aa8fb
JK		 1364 idx = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE;
1365
1366 while (!ret && idx > pg_start) {
1367 nr = idx - pg_start;
1368 if (nr > delta)
1369 nr = delta;
1370 idx -= nr;
f62185d0 1371
f62185d0 1372 f2fs_lock_op(sbi);
5f281fab
JK		 1373 f2fs_drop_extent_tree(inode);
1374
0a2aa8fb
JK		 1375 ret = __exchange_data_block(inode, inode, idx,
1376 idx + delta, nr, false);
f62185d0
CY		 1377 f2fs_unlock_op(sbi);
1378 }
1379
6e2c64ad
JK		 1380 /* write out all moved pages, if possible */
1381 filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1382 truncate_pagecache(inode, offset);
1383
1384 if (!ret)
fc9581c8 1385 f2fs_i_size_write(inode, new_size);
5a3a2d83
QS		 1386out:
1387 up_write(&F2FS_I(inode)->i_mmap_sem);
f62185d0
CY		 1388 return ret;
1389}
1390
fbfa2cc5
JK		 1391static int expand_inode_data(struct inode *inode, loff_t offset,
1392 loff_t len, int mode)
1393{
4081363f 1394 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
e12dd7bd
JK		 1395 struct f2fs_map_blocks map = { .m_next_pgofs = NULL };
1396 pgoff_t pg_end;
fbfa2cc5 1397 loff_t new_size = i_size_read(inode);
e12dd7bd 1398 loff_t off_end;
a7de6086 1399 int err;
fbfa2cc5 1400
a7de6086
JK		 1401 err = inode_newsize_ok(inode, (len + offset));
1402 if (err)
1403 return err;
fbfa2cc5 1404
a7de6086
JK		 1405 err = f2fs_convert_inline_inode(inode);
1406 if (err)
1407 return err;
9e09fc85 1408
2c4db1a6 1409 f2fs_balance_fs(sbi, true);
2a340760 1410
e12dd7bd 1411 pg_end = ((unsigned long long)offset + len) >> PAGE_SHIFT;
09cbfeaf 1412 off_end = (offset + len) & (PAGE_SIZE - 1);
fbfa2cc5 1413
e12dd7bd
JK		 1414 map.m_lblk = ((unsigned long long)offset) >> PAGE_SHIFT;
1415 map.m_len = pg_end - map.m_lblk;
1416 if (off_end)
1417 map.m_len++;
ead43275 1418
a7de6086
JK		 1419 err = f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO);
1420 if (err) {
e12dd7bd 1421 pgoff_t last_off;
fbfa2cc5 1422
e12dd7bd 1423 if (!map.m_len)
a7de6086 1424 return err;
98397ff3 1425
e12dd7bd
JK		 1426 last_off = map.m_lblk + map.m_len - 1;
1427
1428 /* update new size to the failed position */
1429 new_size = (last_off == pg_end) ? offset + len:
1430 (loff_t)(last_off + 1) << PAGE_SHIFT;
1431 } else {
1432 new_size = ((loff_t)pg_end << PAGE_SHIFT) + off_end;
fbfa2cc5
JK		 1433 }
1434
ee6d182f 1435 if (!(mode & FALLOC_FL_KEEP_SIZE) && i_size_read(inode) < new_size)
fc9581c8 1436 f2fs_i_size_write(inode, new_size);
fbfa2cc5 1437
a7de6086 1438 return err;
fbfa2cc5
JK		 1439}
1440
1441static long f2fs_fallocate(struct file *file, int mode,
1442 loff_t offset, loff_t len)
1443{
6131ffaa 1444 struct inode *inode = file_inode(file);
587c0a42 1445 long ret = 0;
fbfa2cc5 1446
c998012b
CY		 1447 /* f2fs only support ->fallocate for regular file */
1448 if (!S_ISREG(inode->i_mode))
1449 return -EINVAL;
1450
f62185d0
CY		 1451 if (f2fs_encrypted_inode(inode) &&
1452 (mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)))
fcc85a4d
JK		 1453 return -EOPNOTSUPP;
1454
b4ace337 1455 if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
f62185d0
CY		 1456 FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE |
1457 FALLOC_FL_INSERT_RANGE))
fbfa2cc5
JK		 1458 return -EOPNOTSUPP;
1459
5955102c 1460 inode_lock(inode);
3375f696 1461
587c0a42
TY		 1462 if (mode & FALLOC_FL_PUNCH_HOLE) {
1463 if (offset >= inode->i_size)
1464 goto out;
1465
a66c7b2f 1466 ret = punch_hole(inode, offset, len);
b4ace337
CY		 1467 } else if (mode & FALLOC_FL_COLLAPSE_RANGE) {
1468 ret = f2fs_collapse_range(inode, offset, len);
75cd4e09
CY		 1469 } else if (mode & FALLOC_FL_ZERO_RANGE) {
1470 ret = f2fs_zero_range(inode, offset, len, mode);
f62185d0
CY		 1471 } else if (mode & FALLOC_FL_INSERT_RANGE) {
1472 ret = f2fs_insert_range(inode, offset, len);
b4ace337 1473 } else {
fbfa2cc5 1474 ret = expand_inode_data(inode, offset, len, mode);
b4ace337 1475 }
fbfa2cc5 1476
3af60a49 1477 if (!ret) {
078cd827 1478 inode->i_mtime = inode->i_ctime = current_time(inode);
7c45729a 1479 f2fs_mark_inode_dirty_sync(inode, false);
26787236
JK		 1480 if (mode & FALLOC_FL_KEEP_SIZE)
1481 file_set_keep_isize(inode);
d0239e1b 1482 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
3af60a49 1483 }
3375f696 1484
587c0a42 1485out:
5955102c 1486 inode_unlock(inode);
3375f696 1487
c01e2853 1488 trace_f2fs_fallocate(inode, mode, offset, len, ret);
fbfa2cc5
JK		 1489 return ret;
1490}
1491
1e84371f
JK		 1492static int f2fs_release_file(struct inode *inode, struct file *filp)
1493{
de5307e4
JK		 1494 /*
1495 * f2fs_relase_file is called at every close calls. So we should
1496 * not drop any inmemory pages by close called by other process.
1497 */
1498 if (!(filp->f_mode & FMODE_WRITE) ||
1499 atomic_read(&inode->i_writecount) != 1)
1500 return 0;
1501
1e84371f
JK		 1502 /* some remained atomic pages should discarded */
1503 if (f2fs_is_atomic_file(inode))
29b96b54 1504 drop_inmem_pages(inode);
1e84371f 1505 if (f2fs_is_volatile_file(inode)) {
91942321 1506 clear_inode_flag(inode, FI_VOLATILE_FILE);
648d50ba 1507 stat_dec_volatile_write(inode);
91942321 1508 set_inode_flag(inode, FI_DROP_CACHE);
1e84371f 1509 filemap_fdatawrite(inode->i_mapping);
91942321 1510 clear_inode_flag(inode, FI_DROP_CACHE);
1e84371f
JK		 1511 }
1512 return 0;
1513}
1514
7a10f017
JK		 1515static int f2fs_file_flush(struct file *file, fl_owner_t id)
1516{
1517 struct inode *inode = file_inode(file);
1518
1519 /*
1520 * If the process doing a transaction is crashed, we should do
1521 * roll-back. Otherwise, other reader/write can see corrupted database
1522 * until all the writers close its file. Since this should be done
1523 * before dropping file lock, it needs to do in ->flush.
1524 */
1525 if (f2fs_is_atomic_file(inode) &&
1526 F2FS_I(inode)->inmem_task == current)
1527 drop_inmem_pages(inode);
1528 return 0;
1529}
1530
52656e6c 1531static int f2fs_ioc_getflags(struct file *filp, unsigned long arg)
fbfa2cc5 1532{
6131ffaa 1533 struct inode *inode = file_inode(filp);
fbfa2cc5 1534 struct f2fs_inode_info *fi = F2FS_I(inode);
2c1d0305
CY		 1535 unsigned int flags = fi->i_flags &
1536 (FS_FL_USER_VISIBLE | FS_PROJINHERIT_FL);
52656e6c
JK		 1537 return put_user(flags, (int __user *)arg);
1538}
fbfa2cc5 1539
2c1d0305
CY		 1540static int __f2fs_ioc_setflags(struct inode *inode, unsigned int flags)
1541{
1542 struct f2fs_inode_info *fi = F2FS_I(inode);
1543 unsigned int oldflags;
1544
1545 /* Is it quota file? Do not allow user to mess with it */
1546 if (IS_NOQUOTA(inode))
1547 return -EPERM;
1548
1549 flags = f2fs_mask_flags(inode->i_mode, flags);
1550
1551 oldflags = fi->i_flags;
1552
1553 if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL))
1554 if (!capable(CAP_LINUX_IMMUTABLE))
1555 return -EPERM;
1556
1557 flags = flags & (FS_FL_USER_MODIFIABLE | FS_PROJINHERIT_FL);
1558 flags |= oldflags & ~(FS_FL_USER_MODIFIABLE | FS_PROJINHERIT_FL);
1559 fi->i_flags = flags;
1560
1561 if (fi->i_flags & FS_PROJINHERIT_FL)
1562 set_inode_flag(inode, FI_PROJ_INHERIT);
1563 else
1564 clear_inode_flag(inode, FI_PROJ_INHERIT);
1565
1566 inode->i_ctime = current_time(inode);
1567 f2fs_set_inode_flags(inode);
1568 f2fs_mark_inode_dirty_sync(inode, false);
1569 return 0;
1570}
1571
52656e6c
JK		 1572static int f2fs_ioc_setflags(struct file *filp, unsigned long arg)
1573{
1574 struct inode *inode = file_inode(filp);
69494229 1575 unsigned int flags;
52656e6c 1576 int ret;
fbfa2cc5 1577
7fb17fe4
CY		 1578 if (!inode_owner_or_capable(inode))
1579 return -EACCES;
1580
1581 if (get_user(flags, (int __user *)arg))
1582 return -EFAULT;
1583
52656e6c
JK		 1584 ret = mnt_want_write_file(filp);
1585 if (ret)
1586 return ret;
fbfa2cc5 1587
5955102c 1588 inode_lock(inode);
fbfa2cc5 1589
2c1d0305 1590 ret = __f2fs_ioc_setflags(inode, flags);
fbfa2cc5 1591
a72d4b97 1592 inode_unlock(inode);
52656e6c
JK		 1593 mnt_drop_write_file(filp);
1594 return ret;
1595}
4b2fecc8 1596
d49f3e89
CY		 1597static int f2fs_ioc_getversion(struct file *filp, unsigned long arg)
1598{
1599 struct inode *inode = file_inode(filp);
1600
1601 return put_user(inode->i_generation, (int __user *)arg);
1602}
1603
88b88a66
JK		 1604static int f2fs_ioc_start_atomic_write(struct file *filp)
1605{
1606 struct inode *inode = file_inode(filp);
f4c9c743 1607 int ret;
88b88a66
JK		 1608
1609 if (!inode_owner_or_capable(inode))
1610 return -EACCES;
1611
e811898c
JK		 1612 if (!S_ISREG(inode->i_mode))
1613 return -EINVAL;
1614
7fb17fe4
CY		 1615 ret = mnt_want_write_file(filp);
1616 if (ret)
1617 return ret;
1618
0fac558b
CY		 1619 inode_lock(inode);
1620
1e84371f 1621 if (f2fs_is_atomic_file(inode))
7fb17fe4 1622 goto out;
88b88a66 1623
f4c9c743
CY		 1624 ret = f2fs_convert_inline_inode(inode);
1625 if (ret)
7fb17fe4 1626 goto out;
88b88a66 1627
91942321 1628 set_inode_flag(inode, FI_ATOMIC_FILE);
6c3acd97 1629 set_inode_flag(inode, FI_HOT_DATA);
d0239e1b
JK		 1630 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1631
c27753d6 1632 if (!get_dirty_pages(inode))
684ca7e5 1633 goto inc_stat;
c27753d6
JK		 1634
1635 f2fs_msg(F2FS_I_SB(inode)->sb, KERN_WARNING,
204706c7 1636 "Unexpected flush for atomic writes: ino=%lu, npages=%u",
c27753d6
JK		 1637 inode->i_ino, get_dirty_pages(inode));
1638 ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
684ca7e5 1639 if (ret) {
91942321 1640 clear_inode_flag(inode, FI_ATOMIC_FILE);
684ca7e5
KM		 1641 goto out;
1642 }
1643
1644inc_stat:
7a10f017 1645 F2FS_I(inode)->inmem_task = current;
26a28a0c
JK		 1646 stat_inc_atomic_write(inode);
1647 stat_update_max_atomic_write(inode);
684ca7e5 1648out:
0fac558b 1649 inode_unlock(inode);
7fb17fe4 1650 mnt_drop_write_file(filp);
c27753d6 1651 return ret;
88b88a66
JK		 1652}
1653
1654static int f2fs_ioc_commit_atomic_write(struct file *filp)
1655{
1656 struct inode *inode = file_inode(filp);
1657 int ret;
1658
1659 if (!inode_owner_or_capable(inode))
1660 return -EACCES;
1661
1662 ret = mnt_want_write_file(filp);
1663 if (ret)
1664 return ret;
1665
0fac558b
CY		 1666 inode_lock(inode);
1667
7fb17fe4
CY		 1668 if (f2fs_is_volatile_file(inode))
1669 goto err_out;
1670
6282adbf 1671 if (f2fs_is_atomic_file(inode)) {
29b96b54 1672 ret = commit_inmem_pages(inode);
5fe45743 1673 if (ret)
edb27dee 1674 goto err_out;
5fe45743 1675
26a28a0c 1676 ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
5fe45743
CY		 1677 if (!ret) {
1678 clear_inode_flag(inode, FI_ATOMIC_FILE);
1679 stat_dec_atomic_write(inode);
447135a8 1680 }
26a28a0c
JK		 1681 } else {
1682 ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
6282adbf 1683 }
edb27dee 1684err_out:
0fac558b 1685 inode_unlock(inode);
88b88a66
JK		 1686 mnt_drop_write_file(filp);
1687 return ret;
1688}
1689
02a1335f
JK		 1690static int f2fs_ioc_start_volatile_write(struct file *filp)
1691{
1692 struct inode *inode = file_inode(filp);
f4c9c743 1693 int ret;
02a1335f
JK		 1694
1695 if (!inode_owner_or_capable(inode))
1696 return -EACCES;
1697
8ff0971f
CY		 1698 if (!S_ISREG(inode->i_mode))
1699 return -EINVAL;
1700
7fb17fe4
CY		 1701 ret = mnt_want_write_file(filp);
1702 if (ret)
1703 return ret;
1704
0fac558b
CY		 1705 inode_lock(inode);
1706
1e84371f 1707 if (f2fs_is_volatile_file(inode))
7fb17fe4 1708 goto out;
1e84371f 1709
f4c9c743
CY		 1710 ret = f2fs_convert_inline_inode(inode);
1711 if (ret)
7fb17fe4 1712 goto out;
b3d208f9 1713
648d50ba
CY		 1714 stat_inc_volatile_write(inode);
1715 stat_update_max_volatile_write(inode);
1716
91942321 1717 set_inode_flag(inode, FI_VOLATILE_FILE);
d0239e1b 1718 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
7fb17fe4 1719out:
0fac558b 1720 inode_unlock(inode);
7fb17fe4
CY		 1721 mnt_drop_write_file(filp);
1722 return ret;
02a1335f
JK		 1723}
1724
1e84371f
JK		 1725static int f2fs_ioc_release_volatile_write(struct file *filp)
1726{
1727 struct inode *inode = file_inode(filp);
7fb17fe4 1728 int ret;
1e84371f
JK		 1729
1730 if (!inode_owner_or_capable(inode))
1731 return -EACCES;
1732
7fb17fe4
CY		 1733 ret = mnt_want_write_file(filp);
1734 if (ret)
1735 return ret;
1736
0fac558b
CY		 1737 inode_lock(inode);
1738
1e84371f 1739 if (!f2fs_is_volatile_file(inode))
7fb17fe4 1740 goto out;
1e84371f 1741
7fb17fe4
CY		 1742 if (!f2fs_is_first_block_written(inode)) {
1743 ret = truncate_partial_data_page(inode, 0, true);
1744 goto out;
1745 }
3c6c2beb 1746
7fb17fe4
CY		 1747 ret = punch_hole(inode, 0, F2FS_BLKSIZE);
1748out:
0fac558b 1749 inode_unlock(inode);
7fb17fe4
CY		 1750 mnt_drop_write_file(filp);
1751 return ret;
1e84371f
JK		 1752}
1753
1754static int f2fs_ioc_abort_volatile_write(struct file *filp)
1755{
1756 struct inode *inode = file_inode(filp);
1757 int ret;
1758
1759 if (!inode_owner_or_capable(inode))
1760 return -EACCES;
1761
1762 ret = mnt_want_write_file(filp);
1763 if (ret)
1764 return ret;
1765
0fac558b
CY		 1766 inode_lock(inode);
1767
26dc3d44 1768 if (f2fs_is_atomic_file(inode))
29b96b54 1769 drop_inmem_pages(inode);
732d5648 1770 if (f2fs_is_volatile_file(inode)) {
91942321 1771 clear_inode_flag(inode, FI_VOLATILE_FILE);
648d50ba 1772 stat_dec_volatile_write(inode);
608514de 1773 ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
732d5648 1774 }
de6a8ec9 1775
0fac558b
CY		 1776 inode_unlock(inode);
1777
1e84371f 1778 mnt_drop_write_file(filp);
d0239e1b 1779 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1e84371f
JK		 1780 return ret;
1781}
1782
1abff93d
JK		 1783static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
1784{
1785 struct inode *inode = file_inode(filp);
1786 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1787 struct super_block *sb = sbi->sb;
1788 __u32 in;
7fb17fe4 1789 int ret;
1abff93d
JK		 1790
1791 if (!capable(CAP_SYS_ADMIN))
1792 return -EPERM;
1793
1794 if (get_user(in, (__u32 __user *)arg))
1795 return -EFAULT;
1796
7fb17fe4
CY		 1797 ret = mnt_want_write_file(filp);
1798 if (ret)
1799 return ret;
1800
1abff93d
JK		 1801 switch (in) {
1802 case F2FS_GOING_DOWN_FULLSYNC:
1803 sb = freeze_bdev(sb->s_bdev);
1804 if (sb && !IS_ERR(sb)) {
38f91ca8 1805 f2fs_stop_checkpoint(sbi, false);
1abff93d
JK		 1806 thaw_bdev(sb->s_bdev, sb);
1807 }
1808 break;
1809 case F2FS_GOING_DOWN_METASYNC:
1810 /* do checkpoint only */
1811 f2fs_sync_fs(sb, 1);
38f91ca8 1812 f2fs_stop_checkpoint(sbi, false);
1abff93d
JK		 1813 break;
1814 case F2FS_GOING_DOWN_NOSYNC:
38f91ca8 1815 f2fs_stop_checkpoint(sbi, false);
1abff93d 1816 break;
c912a829
JK		 1817 case F2FS_GOING_DOWN_METAFLUSH:
1818 sync_meta_pages(sbi, META, LONG_MAX);
38f91ca8 1819 f2fs_stop_checkpoint(sbi, false);
c912a829 1820 break;
1abff93d 1821 default:
7fb17fe4
CY		 1822 ret = -EINVAL;
1823 goto out;
1abff93d 1824 }
d0239e1b 1825 f2fs_update_time(sbi, REQ_TIME);
7fb17fe4
CY		 1826out:
1827 mnt_drop_write_file(filp);
1828 return ret;
1abff93d
JK		 1829}
1830
52656e6c
JK		 1831static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg)
1832{
1833 struct inode *inode = file_inode(filp);
1834 struct super_block *sb = inode->i_sb;
1835 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1836 struct fstrim_range range;
1837 int ret;
4b2fecc8 1838
52656e6c
JK		 1839 if (!capable(CAP_SYS_ADMIN))
1840 return -EPERM;
4b2fecc8 1841
52656e6c
JK		 1842 if (!blk_queue_discard(q))
1843 return -EOPNOTSUPP;
4b2fecc8 1844
52656e6c
JK		 1845 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
1846 sizeof(range)))
1847 return -EFAULT;
4b2fecc8 1848
7fb17fe4
CY		 1849 ret = mnt_want_write_file(filp);
1850 if (ret)
1851 return ret;
1852
52656e6c
JK		 1853 range.minlen = max((unsigned int)range.minlen,
1854 q->limits.discard_granularity);
1855 ret = f2fs_trim_fs(F2FS_SB(sb), &range);
7fb17fe4 1856 mnt_drop_write_file(filp);
52656e6c
JK		 1857 if (ret < 0)
1858 return ret;
4b2fecc8 1859
52656e6c
JK		 1860 if (copy_to_user((struct fstrim_range __user *)arg, &range,
1861 sizeof(range)))
1862 return -EFAULT;
d0239e1b 1863 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
52656e6c
JK		 1864 return 0;
1865}
1866
f424f664
JK		 1867static bool uuid_is_nonzero(__u8 u[16])
1868{
1869 int i;
1870
1871 for (i = 0; i < 16; i++)
1872 if (u[i])
1873 return true;
1874 return false;
1875}
1876
1877static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg)
1878{
f424f664
JK		 1879 struct inode *inode = file_inode(filp);
1880
d0239e1b 1881 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
7fb17fe4 1882
db717d8e 1883 return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
f424f664
JK		 1884}
1885
1886static int f2fs_ioc_get_encryption_policy(struct file *filp, unsigned long arg)
1887{
db717d8e 1888 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
f424f664
JK		 1889}
1890
1891static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg)
1892{
1893 struct inode *inode = file_inode(filp);
1894 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1895 int err;
1896
1897 if (!f2fs_sb_has_crypto(inode->i_sb))
1898 return -EOPNOTSUPP;
1899
1900 if (uuid_is_nonzero(sbi->raw_super->encrypt_pw_salt))
1901 goto got_it;
1902
1903 err = mnt_want_write_file(filp);
1904 if (err)
1905 return err;
1906
1907 /* update superblock with uuid */
1908 generate_random_uuid(sbi->raw_super->encrypt_pw_salt);
1909
c5bda1c8 1910 err = f2fs_commit_super(sbi, false);
f424f664
JK		 1911 if (err) {
1912 /* undo new data */
1913 memset(sbi->raw_super->encrypt_pw_salt, 0, 16);
e8240f65 1914 mnt_drop_write_file(filp);
f424f664
JK		 1915 return err;
1916 }
e8240f65 1917 mnt_drop_write_file(filp);
f424f664
JK		 1918got_it:
1919 if (copy_to_user((__u8 __user *)arg, sbi->raw_super->encrypt_pw_salt,
1920 16))
1921 return -EFAULT;
1922 return 0;
1923}
1924
c1c1b583
CY		 1925static int f2fs_ioc_gc(struct file *filp, unsigned long arg)
1926{
1927 struct inode *inode = file_inode(filp);
1928 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
d530d4d8 1929 __u32 sync;
7fb17fe4 1930 int ret;
c1c1b583
CY		 1931
1932 if (!capable(CAP_SYS_ADMIN))
1933 return -EPERM;
1934
d530d4d8 1935 if (get_user(sync, (__u32 __user *)arg))
c1c1b583
CY		 1936 return -EFAULT;
1937
d530d4d8
CY		 1938 if (f2fs_readonly(sbi->sb))
1939 return -EROFS;
c1c1b583 1940
7fb17fe4
CY		 1941 ret = mnt_want_write_file(filp);
1942 if (ret)
1943 return ret;
1944
d530d4d8 1945 if (!sync) {
7fb17fe4
CY		 1946 if (!mutex_trylock(&sbi->gc_mutex)) {
1947 ret = -EBUSY;
1948 goto out;
1949 }
d530d4d8
CY		 1950 } else {
1951 mutex_lock(&sbi->gc_mutex);
c1c1b583
CY		 1952 }
1953
e066b83c 1954 ret = f2fs_gc(sbi, sync, true, NULL_SEGNO);
7fb17fe4
CY		 1955out:
1956 mnt_drop_write_file(filp);
1957 return ret;
c1c1b583
CY		 1958}
1959
34dc77ad
JK		 1960static int f2fs_ioc_gc_range(struct file *filp, unsigned long arg)
1961{
1962 struct inode *inode = file_inode(filp);
1963 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1964 struct f2fs_gc_range range;
1965 u64 end;
1966 int ret;
1967
1968 if (!capable(CAP_SYS_ADMIN))
1969 return -EPERM;
1970
1971 if (copy_from_user(&range, (struct f2fs_gc_range __user *)arg,
1972 sizeof(range)))
1973 return -EFAULT;
1974
1975 if (f2fs_readonly(sbi->sb))
1976 return -EROFS;
1977
1978 ret = mnt_want_write_file(filp);
1979 if (ret)
1980 return ret;
1981
1982 end = range.start + range.len;
1983 if (range.start < MAIN_BLKADDR(sbi) || end >= MAX_BLKADDR(sbi))
1984 return -EINVAL;
1985do_more:
1986 if (!range.sync) {
1987 if (!mutex_trylock(&sbi->gc_mutex)) {
1988 ret = -EBUSY;
1989 goto out;
1990 }
1991 } else {
1992 mutex_lock(&sbi->gc_mutex);
1993 }
1994
1995 ret = f2fs_gc(sbi, range.sync, true, GET_SEGNO(sbi, range.start));
1996 range.start += sbi->blocks_per_seg;
1997 if (range.start <= end)
1998 goto do_more;
1999out:
2000 mnt_drop_write_file(filp);
2001 return ret;
2002}
2003
456b88e4
CY		 2004static int f2fs_ioc_write_checkpoint(struct file *filp, unsigned long arg)
2005{
2006 struct inode *inode = file_inode(filp);
2007 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
7fb17fe4 2008 int ret;
456b88e4
CY		 2009
2010 if (!capable(CAP_SYS_ADMIN))
2011 return -EPERM;
2012
2013 if (f2fs_readonly(sbi->sb))
2014 return -EROFS;
2015
7fb17fe4
CY		 2016 ret = mnt_want_write_file(filp);
2017 if (ret)
2018 return ret;
2019
2020 ret = f2fs_sync_fs(sbi->sb, 1);
2021
2022 mnt_drop_write_file(filp);
2023 return ret;
456b88e4
CY		 2024}
2025
d323d005
CY		 2026static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
2027 struct file *filp,
2028 struct f2fs_defragment *range)
2029{
2030 struct inode *inode = file_inode(filp);
da85985c 2031 struct f2fs_map_blocks map = { .m_next_pgofs = NULL };
e15882b6 2032 struct extent_info ei = {0,0,0};
d323d005 2033 pgoff_t pg_start, pg_end;
3519e3f9 2034 unsigned int blk_per_seg = sbi->blocks_per_seg;
d323d005 2035 unsigned int total = 0, sec_num;
d323d005
CY		 2036 block_t blk_end = 0;
2037 bool fragmented = false;
2038 int err;
2039
2040 /* if in-place-update policy is enabled, don't waste time here */
7eab0c0d 2041 if (need_inplace_update_policy(inode, NULL))
d323d005
CY		 2042 return -EINVAL;
2043
09cbfeaf
KS		 2044 pg_start = range->start >> PAGE_SHIFT;
2045 pg_end = (range->start + range->len) >> PAGE_SHIFT;
d323d005 2046
2c4db1a6 2047 f2fs_balance_fs(sbi, true);
d323d005 2048
5955102c 2049 inode_lock(inode);
d323d005
CY		 2050
2051 /* writeback all dirty pages in the range */
2052 err = filemap_write_and_wait_range(inode->i_mapping, range->start,
d8fe4f0e 2053 range->start + range->len - 1);
d323d005
CY		 2054 if (err)
2055 goto out;
2056
2057 /*
2058 * lookup mapping info in extent cache, skip defragmenting if physical
2059 * block addresses are continuous.
2060 */
2061 if (f2fs_lookup_extent_cache(inode, pg_start, &ei)) {
2062 if (ei.fofs + ei.len >= pg_end)
2063 goto out;
2064 }
2065
2066 map.m_lblk = pg_start;
d323d005
CY		 2067
2068 /*
2069 * lookup mapping info in dnode page cache, skip defragmenting if all
2070 * physical block addresses are continuous even if there are hole(s)
2071 * in logical blocks.
2072 */
2073 while (map.m_lblk < pg_end) {
a1c1e9b7 2074 map.m_len = pg_end - map.m_lblk;
d323d005
CY		 2075 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_READ);
2076 if (err)
2077 goto out;
2078
2079 if (!(map.m_flags & F2FS_MAP_FLAGS)) {
2080 map.m_lblk++;
d323d005
CY		 2081 continue;
2082 }
2083
2084 if (blk_end && blk_end != map.m_pblk) {
2085 fragmented = true;
2086 break;
2087 }
2088 blk_end = map.m_pblk + map.m_len;
2089
2090 map.m_lblk += map.m_len;
d323d005
CY		 2091 }
2092
2093 if (!fragmented)
2094 goto out;
2095
2096 map.m_lblk = pg_start;
2097 map.m_len = pg_end - pg_start;
2098
4ddb1a4d 2099 sec_num = (map.m_len + BLKS_PER_SEC(sbi) - 1) / BLKS_PER_SEC(sbi);
d323d005
CY		 2100
2101 /*
2102 * make sure there are enough free section for LFS allocation, this can
2103 * avoid defragment running in SSR mode when free section are allocated
2104 * intensively
2105 */
7f3037a5 2106 if (has_not_enough_free_secs(sbi, 0, sec_num)) {
d323d005
CY		 2107 err = -EAGAIN;
2108 goto out;
2109 }
2110
2111 while (map.m_lblk < pg_end) {
2112 pgoff_t idx;
2113 int cnt = 0;
2114
2115do_map:
a1c1e9b7 2116 map.m_len = pg_end - map.m_lblk;
d323d005
CY		 2117 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_READ);
2118 if (err)
2119 goto clear_out;
2120
2121 if (!(map.m_flags & F2FS_MAP_FLAGS)) {
2122 map.m_lblk++;
2123 continue;
2124 }
2125
91942321 2126 set_inode_flag(inode, FI_DO_DEFRAG);
d323d005
CY		 2127
2128 idx = map.m_lblk;
2129 while (idx < map.m_lblk + map.m_len && cnt < blk_per_seg) {
2130 struct page *page;
2131
2132 page = get_lock_data_page(inode, idx, true);
2133 if (IS_ERR(page)) {
2134 err = PTR_ERR(page);
2135 goto clear_out;
2136 }
2137
2138 set_page_dirty(page);
2139 f2fs_put_page(page, 1);
2140
2141 idx++;
2142 cnt++;
2143 total++;
2144 }
2145
2146 map.m_lblk = idx;
d323d005
CY		 2147
2148 if (idx < pg_end && cnt < blk_per_seg)
2149 goto do_map;
2150
91942321 2151 clear_inode_flag(inode, FI_DO_DEFRAG);
d323d005
CY		 2152
2153 err = filemap_fdatawrite(inode->i_mapping);
2154 if (err)
2155 goto out;
2156 }
2157clear_out:
91942321 2158 clear_inode_flag(inode, FI_DO_DEFRAG);
d323d005 2159out:
5955102c 2160 inode_unlock(inode);
d323d005 2161 if (!err)
09cbfeaf 2162 range->len = (u64)total << PAGE_SHIFT;
d323d005
CY		 2163 return err;
2164}
2165
2166static int f2fs_ioc_defragment(struct file *filp, unsigned long arg)
2167{
2168 struct inode *inode = file_inode(filp);
2169 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2170 struct f2fs_defragment range;
2171 int err;
2172
2173 if (!capable(CAP_SYS_ADMIN))
2174 return -EPERM;
2175
7eab0c0d 2176 if (!S_ISREG(inode->i_mode) || f2fs_is_atomic_file(inode))
d323d005
CY		 2177 return -EINVAL;
2178
d7563861
KM		 2179 if (f2fs_readonly(sbi->sb))
2180 return -EROFS;
d323d005
CY		 2181
2182 if (copy_from_user(&range, (struct f2fs_defragment __user *)arg,
d7563861
KM		 2183 sizeof(range)))
2184 return -EFAULT;
d323d005
CY		 2185
2186 /* verify alignment of offset & size */
d7563861
KM		 2187 if (range.start & (F2FS_BLKSIZE - 1) || range.len & (F2FS_BLKSIZE - 1))
2188 return -EINVAL;
d323d005 2189
1941d7bc 2190 if (unlikely((range.start + range.len) >> PAGE_SHIFT >
d7563861
KM		 2191 sbi->max_file_blocks))
2192 return -EINVAL;
2193
2194 err = mnt_want_write_file(filp);
2195 if (err)
2196 return err;
1941d7bc 2197
d323d005 2198 err = f2fs_defragment_range(sbi, filp, &range);
d7563861
KM		 2199 mnt_drop_write_file(filp);
2200
d0239e1b 2201 f2fs_update_time(sbi, REQ_TIME);
d323d005 2202 if (err < 0)
d7563861 2203 return err;
d323d005
CY		 2204
2205 if (copy_to_user((struct f2fs_defragment __user *)arg, &range,
2206 sizeof(range)))
d7563861
KM		 2207 return -EFAULT;
2208
2209 return 0;
d323d005
CY		 2210}
2211
4dd6f977
JK		 2212static int f2fs_move_file_range(struct file *file_in, loff_t pos_in,
2213 struct file *file_out, loff_t pos_out, size_t len)
2214{
2215 struct inode *src = file_inode(file_in);
2216 struct inode *dst = file_inode(file_out);
2217 struct f2fs_sb_info *sbi = F2FS_I_SB(src);
2218 size_t olen = len, dst_max_i_size = 0;
2219 size_t dst_osize;
2220 int ret;
2221
2222 if (file_in->f_path.mnt != file_out->f_path.mnt ||
2223 src->i_sb != dst->i_sb)
2224 return -EXDEV;
2225
2226 if (unlikely(f2fs_readonly(src->i_sb)))
2227 return -EROFS;
2228
fe8494bf
CY		 2229 if (!S_ISREG(src->i_mode) || !S_ISREG(dst->i_mode))
2230 return -EINVAL;
4dd6f977
JK		 2231
2232 if (f2fs_encrypted_inode(src) || f2fs_encrypted_inode(dst))
2233 return -EOPNOTSUPP;
2234
d95fd91c
FL		 2235 if (src == dst) {
2236 if (pos_in == pos_out)
2237 return 0;
2238 if (pos_out > pos_in && pos_out < pos_in + len)
2239 return -EINVAL;
2240 }
2241
4dd6f977 2242 inode_lock(src);
20a3d61d
CY		 2243 if (src != dst) {
2244 if (!inode_trylock(dst)) {
2245 ret = -EBUSY;
2246 goto out;
2247 }
2248 }
4dd6f977
JK		 2249
2250 ret = -EINVAL;
2251 if (pos_in + len > src->i_size || pos_in + len < pos_in)
2252 goto out_unlock;
2253 if (len == 0)
2254 olen = len = src->i_size - pos_in;
2255 if (pos_in + len == src->i_size)
2256 len = ALIGN(src->i_size, F2FS_BLKSIZE) - pos_in;
2257 if (len == 0) {
2258 ret = 0;
2259 goto out_unlock;
2260 }
2261
2262 dst_osize = dst->i_size;
2263 if (pos_out + olen > dst->i_size)
2264 dst_max_i_size = pos_out + olen;
2265
2266 /* verify the end result is block aligned */
2267 if (!IS_ALIGNED(pos_in, F2FS_BLKSIZE) ||
2268 !IS_ALIGNED(pos_in + len, F2FS_BLKSIZE) ||
2269 !IS_ALIGNED(pos_out, F2FS_BLKSIZE))
2270 goto out_unlock;
2271
2272 ret = f2fs_convert_inline_inode(src);
2273 if (ret)
2274 goto out_unlock;
2275
2276 ret = f2fs_convert_inline_inode(dst);
2277 if (ret)
2278 goto out_unlock;
2279
2280 /* write out all dirty pages from offset */
2281 ret = filemap_write_and_wait_range(src->i_mapping,
2282 pos_in, pos_in + len);
2283 if (ret)
2284 goto out_unlock;
2285
2286 ret = filemap_write_and_wait_range(dst->i_mapping,
2287 pos_out, pos_out + len);
2288 if (ret)
2289 goto out_unlock;
2290
2291 f2fs_balance_fs(sbi, true);
2292 f2fs_lock_op(sbi);
61e4da11
FL		 2293 ret = __exchange_data_block(src, dst, pos_in >> F2FS_BLKSIZE_BITS,
2294 pos_out >> F2FS_BLKSIZE_BITS,
2295 len >> F2FS_BLKSIZE_BITS, false);
4dd6f977
JK		 2296
2297 if (!ret) {
2298 if (dst_max_i_size)
2299 f2fs_i_size_write(dst, dst_max_i_size);
2300 else if (dst_osize != dst->i_size)
2301 f2fs_i_size_write(dst, dst_osize);
2302 }
2303 f2fs_unlock_op(sbi);
2304out_unlock:
2305 if (src != dst)
2306 inode_unlock(dst);
20a3d61d 2307out:
4dd6f977
JK		 2308 inode_unlock(src);
2309 return ret;
2310}
2311
2312static int f2fs_ioc_move_range(struct file *filp, unsigned long arg)
2313{
2314 struct f2fs_move_range range;
2315 struct fd dst;
2316 int err;
2317
2318 if (!(filp->f_mode & FMODE_READ) ||
2319 !(filp->f_mode & FMODE_WRITE))
2320 return -EBADF;
2321
2322 if (copy_from_user(&range, (struct f2fs_move_range __user *)arg,
2323 sizeof(range)))
2324 return -EFAULT;
2325
2326 dst = fdget(range.dst_fd);
2327 if (!dst.file)
2328 return -EBADF;
2329
2330 if (!(dst.file->f_mode & FMODE_WRITE)) {
2331 err = -EBADF;
2332 goto err_out;
2333 }
2334
2335 err = mnt_want_write_file(filp);
2336 if (err)
2337 goto err_out;
2338
2339 err = f2fs_move_file_range(filp, range.pos_in, dst.file,
2340 range.pos_out, range.len);
2341
2342 mnt_drop_write_file(filp);
3cecfa5f
KM		 2343 if (err)
2344 goto err_out;
4dd6f977
JK		 2345
2346 if (copy_to_user((struct f2fs_move_range __user *)arg,
2347 &range, sizeof(range)))
2348 err = -EFAULT;
2349err_out:
2350 fdput(dst);
2351 return err;
2352}
2353
e066b83c
JK		 2354static int f2fs_ioc_flush_device(struct file *filp, unsigned long arg)
2355{
2356 struct inode *inode = file_inode(filp);
2357 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2358 struct sit_info *sm = SIT_I(sbi);
2359 unsigned int start_segno = 0, end_segno = 0;
2360 unsigned int dev_start_segno = 0, dev_end_segno = 0;
2361 struct f2fs_flush_device range;
2362 int ret;
2363
2364 if (!capable(CAP_SYS_ADMIN))
2365 return -EPERM;
2366
2367 if (f2fs_readonly(sbi->sb))
2368 return -EROFS;
2369
2370 if (copy_from_user(&range, (struct f2fs_flush_device __user *)arg,
2371 sizeof(range)))
2372 return -EFAULT;
2373
2374 if (sbi->s_ndevs <= 1 || sbi->s_ndevs - 1 <= range.dev_num ||
2375 sbi->segs_per_sec != 1) {
2376 f2fs_msg(sbi->sb, KERN_WARNING,
2377 "Can't flush %u in %d for segs_per_sec %u != 1\n",
2378 range.dev_num, sbi->s_ndevs,
2379 sbi->segs_per_sec);
2380 return -EINVAL;
2381 }
2382
2383 ret = mnt_want_write_file(filp);
2384 if (ret)
2385 return ret;
2386
2387 if (range.dev_num != 0)
2388 dev_start_segno = GET_SEGNO(sbi, FDEV(range.dev_num).start_blk);
2389 dev_end_segno = GET_SEGNO(sbi, FDEV(range.dev_num).end_blk);
2390
2391 start_segno = sm->last_victim[FLUSH_DEVICE];
2392 if (start_segno < dev_start_segno || start_segno >= dev_end_segno)
2393 start_segno = dev_start_segno;
2394 end_segno = min(start_segno + range.segments, dev_end_segno);
2395
2396 while (start_segno < end_segno) {
2397 if (!mutex_trylock(&sbi->gc_mutex)) {
2398 ret = -EBUSY;
2399 goto out;
2400 }
2401 sm->last_victim[GC_CB] = end_segno + 1;
2402 sm->last_victim[GC_GREEDY] = end_segno + 1;
2403 sm->last_victim[ALLOC_NEXT] = end_segno + 1;
2404 ret = f2fs_gc(sbi, true, true, start_segno);
2405 if (ret == -EAGAIN)
2406 ret = 0;
2407 else if (ret < 0)
2408 break;
2409 start_segno++;
2410 }
2411out:
2412 mnt_drop_write_file(filp);
2413 return ret;
2414}
2415
e65ef207
JK		 2416static int f2fs_ioc_get_features(struct file *filp, unsigned long arg)
2417{
2418 struct inode *inode = file_inode(filp);
2419 u32 sb_feature = le32_to_cpu(F2FS_I_SB(inode)->raw_super->feature);
2420
2421 /* Must validate to set it with SQLite behavior in Android. */
2422 sb_feature |= F2FS_FEATURE_ATOMIC_WRITE;
2423
2424 return put_user(sb_feature, (u32 __user *)arg);
2425}
e066b83c 2426
2c1d0305
CY		 2427#ifdef CONFIG_QUOTA
2428static int f2fs_ioc_setproject(struct file *filp, __u32 projid)
2429{
2430 struct inode *inode = file_inode(filp);
2431 struct f2fs_inode_info *fi = F2FS_I(inode);
2432 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2433 struct super_block *sb = sbi->sb;
2434 struct dquot *transfer_to[MAXQUOTAS] = {};
2435 struct page *ipage;
2436 kprojid_t kprojid;
2437 int err;
2438
2439 if (!f2fs_sb_has_project_quota(sb)) {
2440 if (projid != F2FS_DEF_PROJID)
2441 return -EOPNOTSUPP;
2442 else
2443 return 0;
2444 }
2445
2446 if (!f2fs_has_extra_attr(inode))
2447 return -EOPNOTSUPP;
2448
2449 kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
2450
2451 if (projid_eq(kprojid, F2FS_I(inode)->i_projid))
2452 return 0;
2453
2454 err = mnt_want_write_file(filp);
2455 if (err)
2456 return err;
2457
2458 err = -EPERM;
2459 inode_lock(inode);
2460
2461 /* Is it quota file? Do not allow user to mess with it */
2462 if (IS_NOQUOTA(inode))
2463 goto out_unlock;
2464
2465 ipage = get_node_page(sbi, inode->i_ino);
2466 if (IS_ERR(ipage)) {
2467 err = PTR_ERR(ipage);
2468 goto out_unlock;
2469 }
2470
2471 if (!F2FS_FITS_IN_INODE(F2FS_INODE(ipage), fi->i_extra_isize,
2472 i_projid)) {
2473 err = -EOVERFLOW;
2474 f2fs_put_page(ipage, 1);
2475 goto out_unlock;
2476 }
2477 f2fs_put_page(ipage, 1);
2478
2479 dquot_initialize(inode);
2480
2481 transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
2482 if (!IS_ERR(transfer_to[PRJQUOTA])) {
2483 err = __dquot_transfer(inode, transfer_to);
2484 dqput(transfer_to[PRJQUOTA]);
2485 if (err)
2486 goto out_dirty;
2487 }
2488
2489 F2FS_I(inode)->i_projid = kprojid;
2490 inode->i_ctime = current_time(inode);
2491out_dirty:
2492 f2fs_mark_inode_dirty_sync(inode, true);
2493out_unlock:
2494 inode_unlock(inode);
2495 mnt_drop_write_file(filp);
2496 return err;
2497}
2498#else
2499static int f2fs_ioc_setproject(struct file *filp, __u32 projid)
2500{
2501 if (projid != F2FS_DEF_PROJID)
2502 return -EOPNOTSUPP;
2503 return 0;
2504}
2505#endif
2506
2507/* Transfer internal flags to xflags */
2508static inline __u32 f2fs_iflags_to_xflags(unsigned long iflags)
2509{
2510 __u32 xflags = 0;
2511
2512 if (iflags & FS_SYNC_FL)
2513 xflags |= FS_XFLAG_SYNC;
2514 if (iflags & FS_IMMUTABLE_FL)
2515 xflags |= FS_XFLAG_IMMUTABLE;
2516 if (iflags & FS_APPEND_FL)
2517 xflags |= FS_XFLAG_APPEND;
2518 if (iflags & FS_NODUMP_FL)
2519 xflags |= FS_XFLAG_NODUMP;
2520 if (iflags & FS_NOATIME_FL)
2521 xflags |= FS_XFLAG_NOATIME;
2522 if (iflags & FS_PROJINHERIT_FL)
2523 xflags |= FS_XFLAG_PROJINHERIT;
2524 return xflags;
2525}
2526
2527#define F2FS_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
2528 FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
2529 FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT)
2530
2531/* Flags we can manipulate with through EXT4_IOC_FSSETXATTR */
2532#define F2FS_FL_XFLAG_VISIBLE (FS_SYNC_FL | \
2533 FS_IMMUTABLE_FL | \
2534 FS_APPEND_FL | \
2535 FS_NODUMP_FL | \
2536 FS_NOATIME_FL | \
2537 FS_PROJINHERIT_FL)
2538
2539/* Transfer xflags flags to internal */
2540static inline unsigned long f2fs_xflags_to_iflags(__u32 xflags)
2541{
2542 unsigned long iflags = 0;
2543
2544 if (xflags & FS_XFLAG_SYNC)
2545 iflags |= FS_SYNC_FL;
2546 if (xflags & FS_XFLAG_IMMUTABLE)
2547 iflags |= FS_IMMUTABLE_FL;
2548 if (xflags & FS_XFLAG_APPEND)
2549 iflags |= FS_APPEND_FL;
2550 if (xflags & FS_XFLAG_NODUMP)
2551 iflags |= FS_NODUMP_FL;
2552 if (xflags & FS_XFLAG_NOATIME)
2553 iflags |= FS_NOATIME_FL;
2554 if (xflags & FS_XFLAG_PROJINHERIT)
2555 iflags |= FS_PROJINHERIT_FL;
2556
2557 return iflags;
2558}
2559
2560static int f2fs_ioc_fsgetxattr(struct file *filp, unsigned long arg)
2561{
2562 struct inode *inode = file_inode(filp);
2563 struct f2fs_inode_info *fi = F2FS_I(inode);
2564 struct fsxattr fa;
2565
2566 memset(&fa, 0, sizeof(struct fsxattr));
2567 fa.fsx_xflags = f2fs_iflags_to_xflags(fi->i_flags &
2568 (FS_FL_USER_VISIBLE | FS_PROJINHERIT_FL));
2569
2570 if (f2fs_sb_has_project_quota(inode->i_sb))
2571 fa.fsx_projid = (__u32)from_kprojid(&init_user_ns,
2572 fi->i_projid);
2573
2574 if (copy_to_user((struct fsxattr __user *)arg, &fa, sizeof(fa)))
2575 return -EFAULT;
2576 return 0;
2577}
2578
2579static int f2fs_ioc_fssetxattr(struct file *filp, unsigned long arg)
2580{
2581 struct inode *inode = file_inode(filp);
2582 struct f2fs_inode_info *fi = F2FS_I(inode);
2583 struct fsxattr fa;
2584 unsigned int flags;
2585 int err;
2586
2587 if (copy_from_user(&fa, (struct fsxattr __user *)arg, sizeof(fa)))
2588 return -EFAULT;
2589
2590 /* Make sure caller has proper permission */
2591 if (!inode_owner_or_capable(inode))
2592 return -EACCES;
2593
2594 if (fa.fsx_xflags & ~F2FS_SUPPORTED_FS_XFLAGS)
2595 return -EOPNOTSUPP;
2596
2597 flags = f2fs_xflags_to_iflags(fa.fsx_xflags);
2598 if (f2fs_mask_flags(inode->i_mode, flags) != flags)
2599 return -EOPNOTSUPP;
2600
2601 err = mnt_want_write_file(filp);
2602 if (err)
2603 return err;
2604
2605 inode_lock(inode);
2606 flags = (fi->i_flags & ~F2FS_FL_XFLAG_VISIBLE) |
2607 (flags & F2FS_FL_XFLAG_VISIBLE);
2608 err = __f2fs_ioc_setflags(inode, flags);
2609 inode_unlock(inode);
2610 mnt_drop_write_file(filp);
2611 if (err)
2612 return err;
2613
2614 err = f2fs_ioc_setproject(filp, fa.fsx_projid);
2615 if (err)
2616 return err;
2617
2618 return 0;
2619}
2620
52656e6c
JK		 2621long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
2622{
2623 switch (cmd) {
2624 case F2FS_IOC_GETFLAGS:
2625 return f2fs_ioc_getflags(filp, arg);
2626 case F2FS_IOC_SETFLAGS:
2627 return f2fs_ioc_setflags(filp, arg);
d49f3e89
CY		 2628 case F2FS_IOC_GETVERSION:
2629 return f2fs_ioc_getversion(filp, arg);
88b88a66
JK		 2630 case F2FS_IOC_START_ATOMIC_WRITE:
2631 return f2fs_ioc_start_atomic_write(filp);
2632 case F2FS_IOC_COMMIT_ATOMIC_WRITE:
2633 return f2fs_ioc_commit_atomic_write(filp);
02a1335f
JK		 2634 case F2FS_IOC_START_VOLATILE_WRITE:
2635 return f2fs_ioc_start_volatile_write(filp);
1e84371f
JK		 2636 case F2FS_IOC_RELEASE_VOLATILE_WRITE:
2637 return f2fs_ioc_release_volatile_write(filp);
2638 case F2FS_IOC_ABORT_VOLATILE_WRITE:
2639 return f2fs_ioc_abort_volatile_write(filp);
1abff93d
JK		 2640 case F2FS_IOC_SHUTDOWN:
2641 return f2fs_ioc_shutdown(filp, arg);
52656e6c
JK		 2642 case FITRIM:
2643 return f2fs_ioc_fitrim(filp, arg);
f424f664
JK		 2644 case F2FS_IOC_SET_ENCRYPTION_POLICY:
2645 return f2fs_ioc_set_encryption_policy(filp, arg);
2646 case F2FS_IOC_GET_ENCRYPTION_POLICY:
2647 return f2fs_ioc_get_encryption_policy(filp, arg);
2648 case F2FS_IOC_GET_ENCRYPTION_PWSALT:
2649 return f2fs_ioc_get_encryption_pwsalt(filp, arg);
c1c1b583
CY		 2650 case F2FS_IOC_GARBAGE_COLLECT:
2651 return f2fs_ioc_gc(filp, arg);
34dc77ad
JK		 2652 case F2FS_IOC_GARBAGE_COLLECT_RANGE:
2653 return f2fs_ioc_gc_range(filp, arg);
456b88e4
CY		 2654 case F2FS_IOC_WRITE_CHECKPOINT:
2655 return f2fs_ioc_write_checkpoint(filp, arg);
d323d005
CY		 2656 case F2FS_IOC_DEFRAGMENT:
2657 return f2fs_ioc_defragment(filp, arg);
4dd6f977
JK		 2658 case F2FS_IOC_MOVE_RANGE:
2659 return f2fs_ioc_move_range(filp, arg);
e066b83c
JK		 2660 case F2FS_IOC_FLUSH_DEVICE:
2661 return f2fs_ioc_flush_device(filp, arg);
e65ef207
JK		 2662 case F2FS_IOC_GET_FEATURES:
2663 return f2fs_ioc_get_features(filp, arg);
2c1d0305
CY		 2664 case F2FS_IOC_FSGETXATTR:
2665 return f2fs_ioc_fsgetxattr(filp, arg);
2666 case F2FS_IOC_FSSETXATTR:
2667 return f2fs_ioc_fssetxattr(filp, arg);
fbfa2cc5
JK		 2668 default:
2669 return -ENOTTY;
2670 }
2671}
2672
fcc85a4d
JK		 2673static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
2674{
b439b103
JK		 2675 struct file *file = iocb->ki_filp;
2676 struct inode *inode = file_inode(file);
9dfa1baf 2677 struct blk_plug plug;
b439b103 2678 ssize_t ret;
fcc85a4d 2679
b439b103
JK		 2680 inode_lock(inode);
2681 ret = generic_write_checks(iocb, from);
2682 if (ret > 0) {
dc91de78 2683 int err;
a7de6086 2684
dc91de78
JK		 2685 if (iov_iter_fault_in_readable(from, iov_iter_count(from)))
2686 set_inode_flag(inode, FI_NO_PREALLOC);
a7de6086 2687
dc91de78 2688 err = f2fs_preallocate_blocks(iocb, from);
a7de6086
JK		 2689 if (err) {
2690 inode_unlock(inode);
2691 return err;
9dfa1baf 2692 }
a7de6086
JK		 2693 blk_start_plug(&plug);
2694 ret = __generic_file_write_iter(iocb, from);
2695 blk_finish_plug(&plug);
dc91de78 2696 clear_inode_flag(inode, FI_NO_PREALLOC);
b439b103
JK		 2697 }
2698 inode_unlock(inode);
2699
e2592217
CH		 2700 if (ret > 0)
2701 ret = generic_write_sync(iocb, ret);
b439b103 2702 return ret;
fcc85a4d
JK		 2703}
2704
e9750824
NJ		 2705#ifdef CONFIG_COMPAT
2706long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2707{
2708 switch (cmd) {
2709 case F2FS_IOC32_GETFLAGS:
2710 cmd = F2FS_IOC_GETFLAGS;
2711 break;
2712 case F2FS_IOC32_SETFLAGS:
2713 cmd = F2FS_IOC_SETFLAGS;
2714 break;
04ef4b62
CY		 2715 case F2FS_IOC32_GETVERSION:
2716 cmd = F2FS_IOC_GETVERSION;
2717 break;
2718 case F2FS_IOC_START_ATOMIC_WRITE:
2719 case F2FS_IOC_COMMIT_ATOMIC_WRITE:
2720 case F2FS_IOC_START_VOLATILE_WRITE:
2721 case F2FS_IOC_RELEASE_VOLATILE_WRITE:
2722 case F2FS_IOC_ABORT_VOLATILE_WRITE:
2723 case F2FS_IOC_SHUTDOWN:
2724 case F2FS_IOC_SET_ENCRYPTION_POLICY:
2725 case F2FS_IOC_GET_ENCRYPTION_PWSALT:
2726 case F2FS_IOC_GET_ENCRYPTION_POLICY:
2727 case F2FS_IOC_GARBAGE_COLLECT:
34dc77ad 2728 case F2FS_IOC_GARBAGE_COLLECT_RANGE:
04ef4b62
CY		 2729 case F2FS_IOC_WRITE_CHECKPOINT:
2730 case F2FS_IOC_DEFRAGMENT:
4dd6f977 2731 case F2FS_IOC_MOVE_RANGE:
e066b83c 2732 case F2FS_IOC_FLUSH_DEVICE:
e65ef207 2733 case F2FS_IOC_GET_FEATURES:
2c1d0305
CY		 2734 case F2FS_IOC_FSGETXATTR:
2735 case F2FS_IOC_FSSETXATTR:
4dd6f977 2736 break;
e9750824
NJ		 2737 default:
2738 return -ENOIOCTLCMD;
2739 }
2740 return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
2741}
2742#endif
2743
fbfa2cc5 2744const struct file_operations f2fs_file_operations = {
267378d4 2745 .llseek = f2fs_llseek,
aad4f8bb 2746 .read_iter = generic_file_read_iter,
fcc85a4d
JK		 2747 .write_iter = f2fs_file_write_iter,
2748 .open = f2fs_file_open,
12662234 2749 .release = f2fs_release_file,
fbfa2cc5 2750 .mmap = f2fs_file_mmap,
7a10f017 2751 .flush = f2fs_file_flush,
fbfa2cc5
JK		 2752 .fsync = f2fs_sync_file,
2753 .fallocate = f2fs_fallocate,
2754 .unlocked_ioctl = f2fs_ioctl,
e9750824
NJ		 2755#ifdef CONFIG_COMPAT
2756 .compat_ioctl = f2fs_compat_ioctl,
2757#endif
fbfa2cc5 2758 .splice_read = generic_file_splice_read,
8d020765 2759 .splice_write = iter_file_splice_write,
fbfa2cc5 2760};
Motorola kernel-slsi