4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
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.
12 #include <linux/f2fs_fs.h>
13 #include <linux/stat.h>
14 #include <linux/buffer_head.h>
15 #include <linux/writeback.h>
16 #include <linux/blkdev.h>
17 #include <linux/falloc.h>
18 #include <linux/types.h>
19 #include <linux/compat.h>
20 #include <linux/uaccess.h>
21 #include <linux/mount.h>
22 #include <linux/pagevec.h>
29 #include <trace/events/f2fs.h>
31 static int f2fs_vm_page_mkwrite(struct vm_area_struct
*vma
,
34 struct page
*page
= vmf
->page
;
35 struct inode
*inode
= file_inode(vma
->vm_file
);
36 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
37 struct dnode_of_data dn
;
42 sb_start_pagefault(inode
->i_sb
);
44 f2fs_bug_on(sbi
, f2fs_has_inline_data(inode
));
46 /* block allocation */
48 set_new_dnode(&dn
, inode
, NULL
, NULL
, 0);
49 err
= f2fs_reserve_block(&dn
, page
->index
);
57 file_update_time(vma
->vm_file
);
59 if (unlikely(page
->mapping
!= inode
->i_mapping
||
60 page_offset(page
) > i_size_read(inode
) ||
61 !PageUptodate(page
))) {
68 * check to see if the page is mapped already (no holes)
70 if (PageMappedToDisk(page
))
73 /* page is wholly or partially inside EOF */
74 if (((page
->index
+ 1) << PAGE_CACHE_SHIFT
) > i_size_read(inode
)) {
76 offset
= i_size_read(inode
) & ~PAGE_CACHE_MASK
;
77 zero_user_segment(page
, offset
, PAGE_CACHE_SIZE
);
80 SetPageUptodate(page
);
82 trace_f2fs_vm_page_mkwrite(page
, DATA
);
85 f2fs_wait_on_page_writeback(page
, DATA
);
87 sb_end_pagefault(inode
->i_sb
);
88 return block_page_mkwrite_return(err
);
91 static const struct vm_operations_struct f2fs_file_vm_ops
= {
92 .fault
= filemap_fault
,
93 .map_pages
= filemap_map_pages
,
94 .page_mkwrite
= f2fs_vm_page_mkwrite
,
97 static int get_parent_ino(struct inode
*inode
, nid_t
*pino
)
99 struct dentry
*dentry
;
101 inode
= igrab(inode
);
102 dentry
= d_find_any_alias(inode
);
107 if (update_dent_inode(inode
, &dentry
->d_name
)) {
112 *pino
= parent_ino(dentry
);
117 static inline bool need_do_checkpoint(struct inode
*inode
)
119 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
120 bool need_cp
= false;
122 if (!S_ISREG(inode
->i_mode
) || inode
->i_nlink
!= 1)
124 else if (file_wrong_pino(inode
))
126 else if (!space_for_roll_forward(sbi
))
128 else if (!is_checkpointed_node(sbi
, F2FS_I(inode
)->i_pino
))
130 else if (F2FS_I(inode
)->xattr_ver
== cur_cp_version(F2FS_CKPT(sbi
)))
132 else if (test_opt(sbi
, FASTBOOT
))
134 else if (sbi
->active_logs
== 2)
140 static bool need_inode_page_update(struct f2fs_sb_info
*sbi
, nid_t ino
)
142 struct page
*i
= find_get_page(NODE_MAPPING(sbi
), ino
);
144 /* But we need to avoid that there are some inode updates */
145 if ((i
&& PageDirty(i
)) || need_inode_block_update(sbi
, ino
))
151 static void try_to_fix_pino(struct inode
*inode
)
153 struct f2fs_inode_info
*fi
= F2FS_I(inode
);
156 down_write(&fi
->i_sem
);
158 if (file_wrong_pino(inode
) && inode
->i_nlink
== 1 &&
159 get_parent_ino(inode
, &pino
)) {
161 file_got_pino(inode
);
162 up_write(&fi
->i_sem
);
164 mark_inode_dirty_sync(inode
);
165 f2fs_write_inode(inode
, NULL
);
167 up_write(&fi
->i_sem
);
171 int f2fs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
)
173 struct inode
*inode
= file
->f_mapping
->host
;
174 struct f2fs_inode_info
*fi
= F2FS_I(inode
);
175 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
176 nid_t ino
= inode
->i_ino
;
178 bool need_cp
= false;
179 struct writeback_control wbc
= {
180 .sync_mode
= WB_SYNC_ALL
,
181 .nr_to_write
= LONG_MAX
,
185 if (unlikely(f2fs_readonly(inode
->i_sb
)))
188 trace_f2fs_sync_file_enter(inode
);
190 /* if fdatasync is triggered, let's do in-place-update */
191 if (get_dirty_pages(inode
) <= SM_I(sbi
)->min_fsync_blocks
)
192 set_inode_flag(fi
, FI_NEED_IPU
);
193 ret
= filemap_write_and_wait_range(inode
->i_mapping
, start
, end
);
194 clear_inode_flag(fi
, FI_NEED_IPU
);
197 trace_f2fs_sync_file_exit(inode
, need_cp
, datasync
, ret
);
201 /* if the inode is dirty, let's recover all the time */
202 if (!datasync
&& is_inode_flag_set(fi
, FI_DIRTY_INODE
)) {
203 update_inode_page(inode
);
208 * if there is no written data, don't waste time to write recovery info.
210 if (!is_inode_flag_set(fi
, FI_APPEND_WRITE
) &&
211 !exist_written_data(sbi
, ino
, APPEND_INO
)) {
213 /* it may call write_inode just prior to fsync */
214 if (need_inode_page_update(sbi
, ino
))
217 if (is_inode_flag_set(fi
, FI_UPDATE_WRITE
) ||
218 exist_written_data(sbi
, ino
, UPDATE_INO
))
223 /* guarantee free sections for fsync */
224 f2fs_balance_fs(sbi
);
227 * Both of fdatasync() and fsync() are able to be recovered from
230 down_read(&fi
->i_sem
);
231 need_cp
= need_do_checkpoint(inode
);
235 /* all the dirty node pages should be flushed for POR */
236 ret
= f2fs_sync_fs(inode
->i_sb
, 1);
239 * We've secured consistency through sync_fs. Following pino
240 * will be used only for fsynced inodes after checkpoint.
242 try_to_fix_pino(inode
);
246 sync_node_pages(sbi
, ino
, &wbc
);
248 if (need_inode_block_update(sbi
, ino
)) {
249 mark_inode_dirty_sync(inode
);
250 f2fs_write_inode(inode
, NULL
);
254 ret
= wait_on_node_pages_writeback(sbi
, ino
);
258 /* once recovery info is written, don't need to tack this */
259 remove_dirty_inode(sbi
, ino
, APPEND_INO
);
260 clear_inode_flag(fi
, FI_APPEND_WRITE
);
262 remove_dirty_inode(sbi
, ino
, UPDATE_INO
);
263 clear_inode_flag(fi
, FI_UPDATE_WRITE
);
264 ret
= f2fs_issue_flush(sbi
);
266 trace_f2fs_sync_file_exit(inode
, need_cp
, datasync
, ret
);
270 static pgoff_t
__get_first_dirty_index(struct address_space
*mapping
,
271 pgoff_t pgofs
, int whence
)
276 if (whence
!= SEEK_DATA
)
279 /* find first dirty page index */
280 pagevec_init(&pvec
, 0);
281 nr_pages
= pagevec_lookup_tag(&pvec
, mapping
, &pgofs
,
282 PAGECACHE_TAG_DIRTY
, 1);
283 pgofs
= nr_pages
? pvec
.pages
[0]->index
: LONG_MAX
;
284 pagevec_release(&pvec
);
288 static bool __found_offset(block_t blkaddr
, pgoff_t dirty
, pgoff_t pgofs
,
293 if ((blkaddr
== NEW_ADDR
&& dirty
== pgofs
) ||
294 (blkaddr
!= NEW_ADDR
&& blkaddr
!= NULL_ADDR
))
298 if (blkaddr
== NULL_ADDR
)
305 static loff_t
f2fs_seek_block(struct file
*file
, loff_t offset
, int whence
)
307 struct inode
*inode
= file
->f_mapping
->host
;
308 loff_t maxbytes
= inode
->i_sb
->s_maxbytes
;
309 struct dnode_of_data dn
;
310 pgoff_t pgofs
, end_offset
, dirty
;
311 loff_t data_ofs
= offset
;
315 mutex_lock(&inode
->i_mutex
);
317 isize
= i_size_read(inode
);
321 /* handle inline data case */
322 if (f2fs_has_inline_data(inode
) || f2fs_has_inline_dentry(inode
)) {
323 if (whence
== SEEK_HOLE
)
328 pgofs
= (pgoff_t
)(offset
>> PAGE_CACHE_SHIFT
);
330 dirty
= __get_first_dirty_index(inode
->i_mapping
, pgofs
, whence
);
332 for (; data_ofs
< isize
; data_ofs
= pgofs
<< PAGE_CACHE_SHIFT
) {
333 set_new_dnode(&dn
, inode
, NULL
, NULL
, 0);
334 err
= get_dnode_of_data(&dn
, pgofs
, LOOKUP_NODE_RA
);
335 if (err
&& err
!= -ENOENT
) {
337 } else if (err
== -ENOENT
) {
338 /* direct node does not exists */
339 if (whence
== SEEK_DATA
) {
340 pgofs
= PGOFS_OF_NEXT_DNODE(pgofs
,
348 end_offset
= ADDRS_PER_PAGE(dn
.node_page
, F2FS_I(inode
));
350 /* find data/hole in dnode block */
351 for (; dn
.ofs_in_node
< end_offset
;
352 dn
.ofs_in_node
++, pgofs
++,
353 data_ofs
= pgofs
<< PAGE_CACHE_SHIFT
) {
355 blkaddr
= datablock_addr(dn
.node_page
, dn
.ofs_in_node
);
357 if (__found_offset(blkaddr
, dirty
, pgofs
, whence
)) {
365 if (whence
== SEEK_DATA
)
368 if (whence
== SEEK_HOLE
&& data_ofs
> isize
)
370 mutex_unlock(&inode
->i_mutex
);
371 return vfs_setpos(file
, data_ofs
, maxbytes
);
373 mutex_unlock(&inode
->i_mutex
);
377 static loff_t
f2fs_llseek(struct file
*file
, loff_t offset
, int whence
)
379 struct inode
*inode
= file
->f_mapping
->host
;
380 loff_t maxbytes
= inode
->i_sb
->s_maxbytes
;
386 return generic_file_llseek_size(file
, offset
, whence
,
387 maxbytes
, i_size_read(inode
));
392 return f2fs_seek_block(file
, offset
, whence
);
398 static int f2fs_file_mmap(struct file
*file
, struct vm_area_struct
*vma
)
400 struct inode
*inode
= file_inode(file
);
402 /* we don't need to use inline_data strictly */
403 if (f2fs_has_inline_data(inode
)) {
404 int err
= f2fs_convert_inline_inode(inode
);
410 vma
->vm_ops
= &f2fs_file_vm_ops
;
414 int truncate_data_blocks_range(struct dnode_of_data
*dn
, int count
)
416 int nr_free
= 0, ofs
= dn
->ofs_in_node
;
417 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dn
->inode
);
418 struct f2fs_node
*raw_node
;
421 raw_node
= F2FS_NODE(dn
->node_page
);
422 addr
= blkaddr_in_node(raw_node
) + ofs
;
424 for (; count
> 0; count
--, addr
++, dn
->ofs_in_node
++) {
425 block_t blkaddr
= le32_to_cpu(*addr
);
426 if (blkaddr
== NULL_ADDR
)
429 update_extent_cache(NULL_ADDR
, dn
);
430 invalidate_blocks(sbi
, blkaddr
);
434 dec_valid_block_count(sbi
, dn
->inode
, nr_free
);
435 set_page_dirty(dn
->node_page
);
438 dn
->ofs_in_node
= ofs
;
440 trace_f2fs_truncate_data_blocks_range(dn
->inode
, dn
->nid
,
441 dn
->ofs_in_node
, nr_free
);
445 void truncate_data_blocks(struct dnode_of_data
*dn
)
447 truncate_data_blocks_range(dn
, ADDRS_PER_BLOCK
);
450 static int truncate_partial_data_page(struct inode
*inode
, u64 from
)
452 unsigned offset
= from
& (PAGE_CACHE_SIZE
- 1);
458 page
= find_data_page(inode
, from
>> PAGE_CACHE_SHIFT
, false);
463 if (unlikely(!PageUptodate(page
) ||
464 page
->mapping
!= inode
->i_mapping
))
467 f2fs_wait_on_page_writeback(page
, DATA
);
468 zero_user(page
, offset
, PAGE_CACHE_SIZE
- offset
);
469 set_page_dirty(page
);
471 f2fs_put_page(page
, 1);
475 int truncate_blocks(struct inode
*inode
, u64 from
, bool lock
)
477 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
478 unsigned int blocksize
= inode
->i_sb
->s_blocksize
;
479 struct dnode_of_data dn
;
481 int count
= 0, err
= 0;
484 trace_f2fs_truncate_blocks_enter(inode
, from
);
486 free_from
= (pgoff_t
)
487 ((from
+ blocksize
- 1) >> (sbi
->log_blocksize
));
492 ipage
= get_node_page(sbi
, inode
->i_ino
);
494 err
= PTR_ERR(ipage
);
498 if (f2fs_has_inline_data(inode
)) {
499 f2fs_put_page(ipage
, 1);
503 set_new_dnode(&dn
, inode
, ipage
, NULL
, 0);
504 err
= get_dnode_of_data(&dn
, free_from
, LOOKUP_NODE
);
511 count
= ADDRS_PER_PAGE(dn
.node_page
, F2FS_I(inode
));
513 count
-= dn
.ofs_in_node
;
514 f2fs_bug_on(sbi
, count
< 0);
516 if (dn
.ofs_in_node
|| IS_INODE(dn
.node_page
)) {
517 truncate_data_blocks_range(&dn
, count
);
523 err
= truncate_inode_blocks(inode
, free_from
);
528 /* lastly zero out the first data page */
530 err
= truncate_partial_data_page(inode
, from
);
532 trace_f2fs_truncate_blocks_exit(inode
, err
);
536 void f2fs_truncate(struct inode
*inode
)
538 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
) ||
539 S_ISLNK(inode
->i_mode
)))
542 trace_f2fs_truncate(inode
);
544 /* we should check inline_data size */
545 if (f2fs_has_inline_data(inode
) && !f2fs_may_inline(inode
)) {
546 if (f2fs_convert_inline_inode(inode
))
550 if (!truncate_blocks(inode
, i_size_read(inode
), true)) {
551 inode
->i_mtime
= inode
->i_ctime
= CURRENT_TIME
;
552 mark_inode_dirty(inode
);
556 int f2fs_getattr(struct vfsmount
*mnt
,
557 struct dentry
*dentry
, struct kstat
*stat
)
559 struct inode
*inode
= dentry
->d_inode
;
560 generic_fillattr(inode
, stat
);
565 #ifdef CONFIG_F2FS_FS_POSIX_ACL
566 static void __setattr_copy(struct inode
*inode
, const struct iattr
*attr
)
568 struct f2fs_inode_info
*fi
= F2FS_I(inode
);
569 unsigned int ia_valid
= attr
->ia_valid
;
571 if (ia_valid
& ATTR_UID
)
572 inode
->i_uid
= attr
->ia_uid
;
573 if (ia_valid
& ATTR_GID
)
574 inode
->i_gid
= attr
->ia_gid
;
575 if (ia_valid
& ATTR_ATIME
)
576 inode
->i_atime
= timespec_trunc(attr
->ia_atime
,
577 inode
->i_sb
->s_time_gran
);
578 if (ia_valid
& ATTR_MTIME
)
579 inode
->i_mtime
= timespec_trunc(attr
->ia_mtime
,
580 inode
->i_sb
->s_time_gran
);
581 if (ia_valid
& ATTR_CTIME
)
582 inode
->i_ctime
= timespec_trunc(attr
->ia_ctime
,
583 inode
->i_sb
->s_time_gran
);
584 if (ia_valid
& ATTR_MODE
) {
585 umode_t mode
= attr
->ia_mode
;
587 if (!in_group_p(inode
->i_gid
) && !capable(CAP_FSETID
))
589 set_acl_inode(fi
, mode
);
593 #define __setattr_copy setattr_copy
596 int f2fs_setattr(struct dentry
*dentry
, struct iattr
*attr
)
598 struct inode
*inode
= dentry
->d_inode
;
599 struct f2fs_inode_info
*fi
= F2FS_I(inode
);
602 err
= inode_change_ok(inode
, attr
);
606 if (attr
->ia_valid
& ATTR_SIZE
) {
607 if (attr
->ia_size
!= i_size_read(inode
)) {
608 truncate_setsize(inode
, attr
->ia_size
);
609 f2fs_truncate(inode
);
610 f2fs_balance_fs(F2FS_I_SB(inode
));
613 * giving a chance to truncate blocks past EOF which
614 * are fallocated with FALLOC_FL_KEEP_SIZE.
616 f2fs_truncate(inode
);
620 __setattr_copy(inode
, attr
);
622 if (attr
->ia_valid
& ATTR_MODE
) {
623 err
= posix_acl_chmod(inode
, get_inode_mode(inode
));
624 if (err
|| is_inode_flag_set(fi
, FI_ACL_MODE
)) {
625 inode
->i_mode
= fi
->i_acl_mode
;
626 clear_inode_flag(fi
, FI_ACL_MODE
);
630 mark_inode_dirty(inode
);
634 const struct inode_operations f2fs_file_inode_operations
= {
635 .getattr
= f2fs_getattr
,
636 .setattr
= f2fs_setattr
,
637 .get_acl
= f2fs_get_acl
,
638 .set_acl
= f2fs_set_acl
,
639 #ifdef CONFIG_F2FS_FS_XATTR
640 .setxattr
= generic_setxattr
,
641 .getxattr
= generic_getxattr
,
642 .listxattr
= f2fs_listxattr
,
643 .removexattr
= generic_removexattr
,
645 .fiemap
= f2fs_fiemap
,
648 static void fill_zero(struct inode
*inode
, pgoff_t index
,
649 loff_t start
, loff_t len
)
651 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
657 f2fs_balance_fs(sbi
);
660 page
= get_new_data_page(inode
, NULL
, index
, false);
664 f2fs_wait_on_page_writeback(page
, DATA
);
665 zero_user(page
, start
, len
);
666 set_page_dirty(page
);
667 f2fs_put_page(page
, 1);
671 int truncate_hole(struct inode
*inode
, pgoff_t pg_start
, pgoff_t pg_end
)
676 for (index
= pg_start
; index
< pg_end
; index
++) {
677 struct dnode_of_data dn
;
679 set_new_dnode(&dn
, inode
, NULL
, NULL
, 0);
680 err
= get_dnode_of_data(&dn
, index
, LOOKUP_NODE
);
687 if (dn
.data_blkaddr
!= NULL_ADDR
)
688 truncate_data_blocks_range(&dn
, 1);
694 static int punch_hole(struct inode
*inode
, loff_t offset
, loff_t len
)
696 pgoff_t pg_start
, pg_end
;
697 loff_t off_start
, off_end
;
700 if (!S_ISREG(inode
->i_mode
))
703 /* skip punching hole beyond i_size */
704 if (offset
>= inode
->i_size
)
707 if (f2fs_has_inline_data(inode
)) {
708 ret
= f2fs_convert_inline_inode(inode
);
713 pg_start
= ((unsigned long long) offset
) >> PAGE_CACHE_SHIFT
;
714 pg_end
= ((unsigned long long) offset
+ len
) >> PAGE_CACHE_SHIFT
;
716 off_start
= offset
& (PAGE_CACHE_SIZE
- 1);
717 off_end
= (offset
+ len
) & (PAGE_CACHE_SIZE
- 1);
719 if (pg_start
== pg_end
) {
720 fill_zero(inode
, pg_start
, off_start
,
721 off_end
- off_start
);
724 fill_zero(inode
, pg_start
++, off_start
,
725 PAGE_CACHE_SIZE
- off_start
);
727 fill_zero(inode
, pg_end
, 0, off_end
);
729 if (pg_start
< pg_end
) {
730 struct address_space
*mapping
= inode
->i_mapping
;
731 loff_t blk_start
, blk_end
;
732 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
734 f2fs_balance_fs(sbi
);
736 blk_start
= pg_start
<< PAGE_CACHE_SHIFT
;
737 blk_end
= pg_end
<< PAGE_CACHE_SHIFT
;
738 truncate_inode_pages_range(mapping
, blk_start
,
742 ret
= truncate_hole(inode
, pg_start
, pg_end
);
750 static int expand_inode_data(struct inode
*inode
, loff_t offset
,
751 loff_t len
, int mode
)
753 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
754 pgoff_t index
, pg_start
, pg_end
;
755 loff_t new_size
= i_size_read(inode
);
756 loff_t off_start
, off_end
;
759 f2fs_balance_fs(sbi
);
761 ret
= inode_newsize_ok(inode
, (len
+ offset
));
765 if (f2fs_has_inline_data(inode
)) {
766 ret
= f2fs_convert_inline_inode(inode
);
771 pg_start
= ((unsigned long long) offset
) >> PAGE_CACHE_SHIFT
;
772 pg_end
= ((unsigned long long) offset
+ len
) >> PAGE_CACHE_SHIFT
;
774 off_start
= offset
& (PAGE_CACHE_SIZE
- 1);
775 off_end
= (offset
+ len
) & (PAGE_CACHE_SIZE
- 1);
779 for (index
= pg_start
; index
<= pg_end
; index
++) {
780 struct dnode_of_data dn
;
782 if (index
== pg_end
&& !off_end
)
785 set_new_dnode(&dn
, inode
, NULL
, NULL
, 0);
786 ret
= f2fs_reserve_block(&dn
, index
);
790 if (pg_start
== pg_end
)
791 new_size
= offset
+ len
;
792 else if (index
== pg_start
&& off_start
)
793 new_size
= (index
+ 1) << PAGE_CACHE_SHIFT
;
794 else if (index
== pg_end
)
795 new_size
= (index
<< PAGE_CACHE_SHIFT
) + off_end
;
797 new_size
+= PAGE_CACHE_SIZE
;
800 if (!(mode
& FALLOC_FL_KEEP_SIZE
) &&
801 i_size_read(inode
) < new_size
) {
802 i_size_write(inode
, new_size
);
803 mark_inode_dirty(inode
);
804 update_inode_page(inode
);
811 static long f2fs_fallocate(struct file
*file
, int mode
,
812 loff_t offset
, loff_t len
)
814 struct inode
*inode
= file_inode(file
);
817 if (mode
& ~(FALLOC_FL_KEEP_SIZE
| FALLOC_FL_PUNCH_HOLE
))
820 mutex_lock(&inode
->i_mutex
);
822 if (mode
& FALLOC_FL_PUNCH_HOLE
)
823 ret
= punch_hole(inode
, offset
, len
);
825 ret
= expand_inode_data(inode
, offset
, len
, mode
);
828 inode
->i_mtime
= inode
->i_ctime
= CURRENT_TIME
;
829 mark_inode_dirty(inode
);
832 mutex_unlock(&inode
->i_mutex
);
834 trace_f2fs_fallocate(inode
, mode
, offset
, len
, ret
);
838 #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL))
839 #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL)
841 static inline __u32
f2fs_mask_flags(umode_t mode
, __u32 flags
)
845 else if (S_ISREG(mode
))
846 return flags
& F2FS_REG_FLMASK
;
848 return flags
& F2FS_OTHER_FLMASK
;
851 static int f2fs_ioc_getflags(struct file
*filp
, unsigned long arg
)
853 struct inode
*inode
= file_inode(filp
);
854 struct f2fs_inode_info
*fi
= F2FS_I(inode
);
855 unsigned int flags
= fi
->i_flags
& FS_FL_USER_VISIBLE
;
856 return put_user(flags
, (int __user
*)arg
);
859 static int f2fs_ioc_setflags(struct file
*filp
, unsigned long arg
)
861 struct inode
*inode
= file_inode(filp
);
862 struct f2fs_inode_info
*fi
= F2FS_I(inode
);
863 unsigned int flags
= fi
->i_flags
& FS_FL_USER_VISIBLE
;
864 unsigned int oldflags
;
867 ret
= mnt_want_write_file(filp
);
871 if (!inode_owner_or_capable(inode
)) {
876 if (get_user(flags
, (int __user
*)arg
)) {
881 flags
= f2fs_mask_flags(inode
->i_mode
, flags
);
883 mutex_lock(&inode
->i_mutex
);
885 oldflags
= fi
->i_flags
;
887 if ((flags
^ oldflags
) & (FS_APPEND_FL
| FS_IMMUTABLE_FL
)) {
888 if (!capable(CAP_LINUX_IMMUTABLE
)) {
889 mutex_unlock(&inode
->i_mutex
);
895 flags
= flags
& FS_FL_USER_MODIFIABLE
;
896 flags
|= oldflags
& ~FS_FL_USER_MODIFIABLE
;
898 mutex_unlock(&inode
->i_mutex
);
900 f2fs_set_inode_flags(inode
);
901 inode
->i_ctime
= CURRENT_TIME
;
902 mark_inode_dirty(inode
);
904 mnt_drop_write_file(filp
);
908 static int f2fs_ioc_start_atomic_write(struct file
*filp
)
910 struct inode
*inode
= file_inode(filp
);
911 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
913 if (!inode_owner_or_capable(inode
))
916 f2fs_balance_fs(sbi
);
918 set_inode_flag(F2FS_I(inode
), FI_ATOMIC_FILE
);
920 return f2fs_convert_inline_inode(inode
);
923 static int f2fs_release_file(struct inode
*inode
, struct file
*filp
)
925 /* some remained atomic pages should discarded */
926 if (f2fs_is_atomic_file(inode
) || f2fs_is_volatile_file(inode
))
927 commit_inmem_pages(inode
, true);
931 static int f2fs_ioc_commit_atomic_write(struct file
*filp
)
933 struct inode
*inode
= file_inode(filp
);
936 if (!inode_owner_or_capable(inode
))
939 if (f2fs_is_volatile_file(inode
))
942 ret
= mnt_want_write_file(filp
);
946 if (f2fs_is_atomic_file(inode
))
947 commit_inmem_pages(inode
, false);
949 ret
= f2fs_sync_file(filp
, 0, LONG_MAX
, 0);
950 mnt_drop_write_file(filp
);
954 static int f2fs_ioc_start_volatile_write(struct file
*filp
)
956 struct inode
*inode
= file_inode(filp
);
958 if (!inode_owner_or_capable(inode
))
961 set_inode_flag(F2FS_I(inode
), FI_VOLATILE_FILE
);
963 return f2fs_convert_inline_inode(inode
);
966 static int f2fs_ioc_fitrim(struct file
*filp
, unsigned long arg
)
968 struct inode
*inode
= file_inode(filp
);
969 struct super_block
*sb
= inode
->i_sb
;
970 struct request_queue
*q
= bdev_get_queue(sb
->s_bdev
);
971 struct fstrim_range range
;
974 if (!capable(CAP_SYS_ADMIN
))
977 if (!blk_queue_discard(q
))
980 if (copy_from_user(&range
, (struct fstrim_range __user
*)arg
,
984 range
.minlen
= max((unsigned int)range
.minlen
,
985 q
->limits
.discard_granularity
);
986 ret
= f2fs_trim_fs(F2FS_SB(sb
), &range
);
990 if (copy_to_user((struct fstrim_range __user
*)arg
, &range
,
996 long f2fs_ioctl(struct file
*filp
, unsigned int cmd
, unsigned long arg
)
999 case F2FS_IOC_GETFLAGS
:
1000 return f2fs_ioc_getflags(filp
, arg
);
1001 case F2FS_IOC_SETFLAGS
:
1002 return f2fs_ioc_setflags(filp
, arg
);
1003 case F2FS_IOC_START_ATOMIC_WRITE
:
1004 return f2fs_ioc_start_atomic_write(filp
);
1005 case F2FS_IOC_COMMIT_ATOMIC_WRITE
:
1006 return f2fs_ioc_commit_atomic_write(filp
);
1007 case F2FS_IOC_START_VOLATILE_WRITE
:
1008 return f2fs_ioc_start_volatile_write(filp
);
1010 return f2fs_ioc_fitrim(filp
, arg
);
1016 #ifdef CONFIG_COMPAT
1017 long f2fs_compat_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
1020 case F2FS_IOC32_GETFLAGS
:
1021 cmd
= F2FS_IOC_GETFLAGS
;
1023 case F2FS_IOC32_SETFLAGS
:
1024 cmd
= F2FS_IOC_SETFLAGS
;
1027 return -ENOIOCTLCMD
;
1029 return f2fs_ioctl(file
, cmd
, (unsigned long) compat_ptr(arg
));
1033 const struct file_operations f2fs_file_operations
= {
1034 .llseek
= f2fs_llseek
,
1035 .read
= new_sync_read
,
1036 .write
= new_sync_write
,
1037 .read_iter
= generic_file_read_iter
,
1038 .write_iter
= generic_file_write_iter
,
1039 .open
= generic_file_open
,
1040 .release
= f2fs_release_file
,
1041 .mmap
= f2fs_file_mmap
,
1042 .fsync
= f2fs_sync_file
,
1043 .fallocate
= f2fs_fallocate
,
1044 .unlocked_ioctl
= f2fs_ioctl
,
1045 #ifdef CONFIG_COMPAT
1046 .compat_ioctl
= f2fs_compat_ioctl
,
1048 .splice_read
= generic_file_splice_read
,
1049 .splice_write
= iter_file_splice_write
,