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
,
95 .remap_pages
= generic_file_remap_pages
,
98 static int get_parent_ino(struct inode
*inode
, nid_t
*pino
)
100 struct dentry
*dentry
;
102 inode
= igrab(inode
);
103 dentry
= d_find_any_alias(inode
);
108 if (update_dent_inode(inode
, &dentry
->d_name
)) {
113 *pino
= parent_ino(dentry
);
118 static inline bool need_do_checkpoint(struct inode
*inode
)
120 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
121 bool need_cp
= false;
123 if (!S_ISREG(inode
->i_mode
) || inode
->i_nlink
!= 1)
125 else if (file_wrong_pino(inode
))
127 else if (!space_for_roll_forward(sbi
))
129 else if (!is_checkpointed_node(sbi
, F2FS_I(inode
)->i_pino
))
131 else if (F2FS_I(inode
)->xattr_ver
== cur_cp_version(F2FS_CKPT(sbi
)))
133 else if (test_opt(sbi
, FASTBOOT
))
135 else if (sbi
->active_logs
== 2)
141 static bool need_inode_page_update(struct f2fs_sb_info
*sbi
, nid_t ino
)
143 struct page
*i
= find_get_page(NODE_MAPPING(sbi
), ino
);
145 /* But we need to avoid that there are some inode updates */
146 if ((i
&& PageDirty(i
)) || need_inode_block_update(sbi
, ino
))
152 static void try_to_fix_pino(struct inode
*inode
)
154 struct f2fs_inode_info
*fi
= F2FS_I(inode
);
157 down_write(&fi
->i_sem
);
159 if (file_wrong_pino(inode
) && inode
->i_nlink
== 1 &&
160 get_parent_ino(inode
, &pino
)) {
162 file_got_pino(inode
);
163 up_write(&fi
->i_sem
);
165 mark_inode_dirty_sync(inode
);
166 f2fs_write_inode(inode
, NULL
);
168 up_write(&fi
->i_sem
);
172 int f2fs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
)
174 struct inode
*inode
= file
->f_mapping
->host
;
175 struct f2fs_inode_info
*fi
= F2FS_I(inode
);
176 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
177 nid_t ino
= inode
->i_ino
;
179 bool need_cp
= false;
180 struct writeback_control wbc
= {
181 .sync_mode
= WB_SYNC_ALL
,
182 .nr_to_write
= LONG_MAX
,
186 if (unlikely(f2fs_readonly(inode
->i_sb
)))
189 trace_f2fs_sync_file_enter(inode
);
191 /* if fdatasync is triggered, let's do in-place-update */
192 if (get_dirty_pages(inode
) <= SM_I(sbi
)->min_fsync_blocks
)
193 set_inode_flag(fi
, FI_NEED_IPU
);
194 ret
= filemap_write_and_wait_range(inode
->i_mapping
, start
, end
);
195 clear_inode_flag(fi
, FI_NEED_IPU
);
198 trace_f2fs_sync_file_exit(inode
, need_cp
, datasync
, ret
);
202 /* if the inode is dirty, let's recover all the time */
203 if (!datasync
&& is_inode_flag_set(fi
, FI_DIRTY_INODE
)) {
204 update_inode_page(inode
);
209 * if there is no written data, don't waste time to write recovery info.
211 if (!is_inode_flag_set(fi
, FI_APPEND_WRITE
) &&
212 !exist_written_data(sbi
, ino
, APPEND_INO
)) {
214 /* it may call write_inode just prior to fsync */
215 if (need_inode_page_update(sbi
, ino
))
218 if (is_inode_flag_set(fi
, FI_UPDATE_WRITE
) ||
219 exist_written_data(sbi
, ino
, UPDATE_INO
))
224 /* guarantee free sections for fsync */
225 f2fs_balance_fs(sbi
);
228 * Both of fdatasync() and fsync() are able to be recovered from
231 down_read(&fi
->i_sem
);
232 need_cp
= need_do_checkpoint(inode
);
236 /* all the dirty node pages should be flushed for POR */
237 ret
= f2fs_sync_fs(inode
->i_sb
, 1);
240 * We've secured consistency through sync_fs. Following pino
241 * will be used only for fsynced inodes after checkpoint.
243 try_to_fix_pino(inode
);
247 sync_node_pages(sbi
, ino
, &wbc
);
249 if (need_inode_block_update(sbi
, ino
)) {
250 mark_inode_dirty_sync(inode
);
251 f2fs_write_inode(inode
, NULL
);
255 ret
= wait_on_node_pages_writeback(sbi
, ino
);
259 /* once recovery info is written, don't need to tack this */
260 remove_dirty_inode(sbi
, ino
, APPEND_INO
);
261 clear_inode_flag(fi
, FI_APPEND_WRITE
);
263 remove_dirty_inode(sbi
, ino
, UPDATE_INO
);
264 clear_inode_flag(fi
, FI_UPDATE_WRITE
);
265 ret
= f2fs_issue_flush(sbi
);
267 trace_f2fs_sync_file_exit(inode
, need_cp
, datasync
, ret
);
271 static pgoff_t
__get_first_dirty_index(struct address_space
*mapping
,
272 pgoff_t pgofs
, int whence
)
277 if (whence
!= SEEK_DATA
)
280 /* find first dirty page index */
281 pagevec_init(&pvec
, 0);
282 nr_pages
= pagevec_lookup_tag(&pvec
, mapping
, &pgofs
,
283 PAGECACHE_TAG_DIRTY
, 1);
284 pgofs
= nr_pages
? pvec
.pages
[0]->index
: LONG_MAX
;
285 pagevec_release(&pvec
);
289 static bool __found_offset(block_t blkaddr
, pgoff_t dirty
, pgoff_t pgofs
,
294 if ((blkaddr
== NEW_ADDR
&& dirty
== pgofs
) ||
295 (blkaddr
!= NEW_ADDR
&& blkaddr
!= NULL_ADDR
))
299 if (blkaddr
== NULL_ADDR
)
306 static loff_t
f2fs_seek_block(struct file
*file
, loff_t offset
, int whence
)
308 struct inode
*inode
= file
->f_mapping
->host
;
309 loff_t maxbytes
= inode
->i_sb
->s_maxbytes
;
310 struct dnode_of_data dn
;
311 pgoff_t pgofs
, end_offset
, dirty
;
312 loff_t data_ofs
= offset
;
316 mutex_lock(&inode
->i_mutex
);
318 isize
= i_size_read(inode
);
322 /* handle inline data case */
323 if (f2fs_has_inline_data(inode
) || f2fs_has_inline_dentry(inode
)) {
324 if (whence
== SEEK_HOLE
)
329 pgofs
= (pgoff_t
)(offset
>> PAGE_CACHE_SHIFT
);
331 dirty
= __get_first_dirty_index(inode
->i_mapping
, pgofs
, whence
);
333 for (; data_ofs
< isize
; data_ofs
= pgofs
<< PAGE_CACHE_SHIFT
) {
334 set_new_dnode(&dn
, inode
, NULL
, NULL
, 0);
335 err
= get_dnode_of_data(&dn
, pgofs
, LOOKUP_NODE_RA
);
336 if (err
&& err
!= -ENOENT
) {
338 } else if (err
== -ENOENT
) {
339 /* direct node does not exists */
340 if (whence
== SEEK_DATA
) {
341 pgofs
= PGOFS_OF_NEXT_DNODE(pgofs
,
349 end_offset
= ADDRS_PER_PAGE(dn
.node_page
, F2FS_I(inode
));
351 /* find data/hole in dnode block */
352 for (; dn
.ofs_in_node
< end_offset
;
353 dn
.ofs_in_node
++, pgofs
++,
354 data_ofs
= pgofs
<< PAGE_CACHE_SHIFT
) {
356 blkaddr
= datablock_addr(dn
.node_page
, dn
.ofs_in_node
);
358 if (__found_offset(blkaddr
, dirty
, pgofs
, whence
)) {
366 if (whence
== SEEK_DATA
)
369 if (whence
== SEEK_HOLE
&& data_ofs
> isize
)
371 mutex_unlock(&inode
->i_mutex
);
372 return vfs_setpos(file
, data_ofs
, maxbytes
);
374 mutex_unlock(&inode
->i_mutex
);
378 static loff_t
f2fs_llseek(struct file
*file
, loff_t offset
, int whence
)
380 struct inode
*inode
= file
->f_mapping
->host
;
381 loff_t maxbytes
= inode
->i_sb
->s_maxbytes
;
387 return generic_file_llseek_size(file
, offset
, whence
,
388 maxbytes
, i_size_read(inode
));
393 return f2fs_seek_block(file
, offset
, whence
);
399 static int f2fs_file_mmap(struct file
*file
, struct vm_area_struct
*vma
)
401 struct inode
*inode
= file_inode(file
);
403 /* we don't need to use inline_data strictly */
404 if (f2fs_has_inline_data(inode
)) {
405 int err
= f2fs_convert_inline_inode(inode
);
411 vma
->vm_ops
= &f2fs_file_vm_ops
;
415 int truncate_data_blocks_range(struct dnode_of_data
*dn
, int count
)
417 int nr_free
= 0, ofs
= dn
->ofs_in_node
;
418 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dn
->inode
);
419 struct f2fs_node
*raw_node
;
422 raw_node
= F2FS_NODE(dn
->node_page
);
423 addr
= blkaddr_in_node(raw_node
) + ofs
;
425 for (; count
> 0; count
--, addr
++, dn
->ofs_in_node
++) {
426 block_t blkaddr
= le32_to_cpu(*addr
);
427 if (blkaddr
== NULL_ADDR
)
430 update_extent_cache(NULL_ADDR
, dn
);
431 invalidate_blocks(sbi
, blkaddr
);
435 dec_valid_block_count(sbi
, dn
->inode
, nr_free
);
436 set_page_dirty(dn
->node_page
);
439 dn
->ofs_in_node
= ofs
;
441 trace_f2fs_truncate_data_blocks_range(dn
->inode
, dn
->nid
,
442 dn
->ofs_in_node
, nr_free
);
446 void truncate_data_blocks(struct dnode_of_data
*dn
)
448 truncate_data_blocks_range(dn
, ADDRS_PER_BLOCK
);
451 static int truncate_partial_data_page(struct inode
*inode
, u64 from
)
453 unsigned offset
= from
& (PAGE_CACHE_SIZE
- 1);
459 page
= find_data_page(inode
, from
>> PAGE_CACHE_SHIFT
, false);
464 if (unlikely(!PageUptodate(page
) ||
465 page
->mapping
!= inode
->i_mapping
))
468 f2fs_wait_on_page_writeback(page
, DATA
);
469 zero_user(page
, offset
, PAGE_CACHE_SIZE
- offset
);
470 set_page_dirty(page
);
472 f2fs_put_page(page
, 1);
476 int truncate_blocks(struct inode
*inode
, u64 from
, bool lock
)
478 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
479 unsigned int blocksize
= inode
->i_sb
->s_blocksize
;
480 struct dnode_of_data dn
;
482 int count
= 0, err
= 0;
485 trace_f2fs_truncate_blocks_enter(inode
, from
);
487 free_from
= (pgoff_t
)
488 ((from
+ blocksize
- 1) >> (sbi
->log_blocksize
));
493 ipage
= get_node_page(sbi
, inode
->i_ino
);
495 err
= PTR_ERR(ipage
);
499 if (f2fs_has_inline_data(inode
)) {
500 f2fs_put_page(ipage
, 1);
504 set_new_dnode(&dn
, inode
, ipage
, NULL
, 0);
505 err
= get_dnode_of_data(&dn
, free_from
, LOOKUP_NODE
);
512 count
= ADDRS_PER_PAGE(dn
.node_page
, F2FS_I(inode
));
514 count
-= dn
.ofs_in_node
;
515 f2fs_bug_on(sbi
, count
< 0);
517 if (dn
.ofs_in_node
|| IS_INODE(dn
.node_page
)) {
518 truncate_data_blocks_range(&dn
, count
);
524 err
= truncate_inode_blocks(inode
, free_from
);
529 /* lastly zero out the first data page */
531 err
= truncate_partial_data_page(inode
, from
);
533 trace_f2fs_truncate_blocks_exit(inode
, err
);
537 void f2fs_truncate(struct inode
*inode
)
539 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
) ||
540 S_ISLNK(inode
->i_mode
)))
543 trace_f2fs_truncate(inode
);
545 /* we should check inline_data size */
546 if (f2fs_has_inline_data(inode
) && !f2fs_may_inline(inode
)) {
547 if (f2fs_convert_inline_inode(inode
))
551 if (!truncate_blocks(inode
, i_size_read(inode
), true)) {
552 inode
->i_mtime
= inode
->i_ctime
= CURRENT_TIME
;
553 mark_inode_dirty(inode
);
557 int f2fs_getattr(struct vfsmount
*mnt
,
558 struct dentry
*dentry
, struct kstat
*stat
)
560 struct inode
*inode
= dentry
->d_inode
;
561 generic_fillattr(inode
, stat
);
566 #ifdef CONFIG_F2FS_FS_POSIX_ACL
567 static void __setattr_copy(struct inode
*inode
, const struct iattr
*attr
)
569 struct f2fs_inode_info
*fi
= F2FS_I(inode
);
570 unsigned int ia_valid
= attr
->ia_valid
;
572 if (ia_valid
& ATTR_UID
)
573 inode
->i_uid
= attr
->ia_uid
;
574 if (ia_valid
& ATTR_GID
)
575 inode
->i_gid
= attr
->ia_gid
;
576 if (ia_valid
& ATTR_ATIME
)
577 inode
->i_atime
= timespec_trunc(attr
->ia_atime
,
578 inode
->i_sb
->s_time_gran
);
579 if (ia_valid
& ATTR_MTIME
)
580 inode
->i_mtime
= timespec_trunc(attr
->ia_mtime
,
581 inode
->i_sb
->s_time_gran
);
582 if (ia_valid
& ATTR_CTIME
)
583 inode
->i_ctime
= timespec_trunc(attr
->ia_ctime
,
584 inode
->i_sb
->s_time_gran
);
585 if (ia_valid
& ATTR_MODE
) {
586 umode_t mode
= attr
->ia_mode
;
588 if (!in_group_p(inode
->i_gid
) && !capable(CAP_FSETID
))
590 set_acl_inode(fi
, mode
);
594 #define __setattr_copy setattr_copy
597 int f2fs_setattr(struct dentry
*dentry
, struct iattr
*attr
)
599 struct inode
*inode
= dentry
->d_inode
;
600 struct f2fs_inode_info
*fi
= F2FS_I(inode
);
603 err
= inode_change_ok(inode
, attr
);
607 if (attr
->ia_valid
& ATTR_SIZE
) {
608 if (attr
->ia_size
!= i_size_read(inode
)) {
609 truncate_setsize(inode
, attr
->ia_size
);
610 f2fs_truncate(inode
);
611 f2fs_balance_fs(F2FS_I_SB(inode
));
614 * giving a chance to truncate blocks past EOF which
615 * are fallocated with FALLOC_FL_KEEP_SIZE.
617 f2fs_truncate(inode
);
621 __setattr_copy(inode
, attr
);
623 if (attr
->ia_valid
& ATTR_MODE
) {
624 err
= posix_acl_chmod(inode
, get_inode_mode(inode
));
625 if (err
|| is_inode_flag_set(fi
, FI_ACL_MODE
)) {
626 inode
->i_mode
= fi
->i_acl_mode
;
627 clear_inode_flag(fi
, FI_ACL_MODE
);
631 mark_inode_dirty(inode
);
635 const struct inode_operations f2fs_file_inode_operations
= {
636 .getattr
= f2fs_getattr
,
637 .setattr
= f2fs_setattr
,
638 .get_acl
= f2fs_get_acl
,
639 .set_acl
= f2fs_set_acl
,
640 #ifdef CONFIG_F2FS_FS_XATTR
641 .setxattr
= generic_setxattr
,
642 .getxattr
= generic_getxattr
,
643 .listxattr
= f2fs_listxattr
,
644 .removexattr
= generic_removexattr
,
646 .fiemap
= f2fs_fiemap
,
649 static void fill_zero(struct inode
*inode
, pgoff_t index
,
650 loff_t start
, loff_t len
)
652 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
658 f2fs_balance_fs(sbi
);
661 page
= get_new_data_page(inode
, NULL
, index
, false);
665 f2fs_wait_on_page_writeback(page
, DATA
);
666 zero_user(page
, start
, len
);
667 set_page_dirty(page
);
668 f2fs_put_page(page
, 1);
672 int truncate_hole(struct inode
*inode
, pgoff_t pg_start
, pgoff_t pg_end
)
677 for (index
= pg_start
; index
< pg_end
; index
++) {
678 struct dnode_of_data dn
;
680 set_new_dnode(&dn
, inode
, NULL
, NULL
, 0);
681 err
= get_dnode_of_data(&dn
, index
, LOOKUP_NODE
);
688 if (dn
.data_blkaddr
!= NULL_ADDR
)
689 truncate_data_blocks_range(&dn
, 1);
695 static int punch_hole(struct inode
*inode
, loff_t offset
, loff_t len
)
697 pgoff_t pg_start
, pg_end
;
698 loff_t off_start
, off_end
;
701 if (!S_ISREG(inode
->i_mode
))
704 /* skip punching hole beyond i_size */
705 if (offset
>= inode
->i_size
)
708 if (f2fs_has_inline_data(inode
)) {
709 ret
= f2fs_convert_inline_inode(inode
);
714 pg_start
= ((unsigned long long) offset
) >> PAGE_CACHE_SHIFT
;
715 pg_end
= ((unsigned long long) offset
+ len
) >> PAGE_CACHE_SHIFT
;
717 off_start
= offset
& (PAGE_CACHE_SIZE
- 1);
718 off_end
= (offset
+ len
) & (PAGE_CACHE_SIZE
- 1);
720 if (pg_start
== pg_end
) {
721 fill_zero(inode
, pg_start
, off_start
,
722 off_end
- off_start
);
725 fill_zero(inode
, pg_start
++, off_start
,
726 PAGE_CACHE_SIZE
- off_start
);
728 fill_zero(inode
, pg_end
, 0, off_end
);
730 if (pg_start
< pg_end
) {
731 struct address_space
*mapping
= inode
->i_mapping
;
732 loff_t blk_start
, blk_end
;
733 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
735 f2fs_balance_fs(sbi
);
737 blk_start
= pg_start
<< PAGE_CACHE_SHIFT
;
738 blk_end
= pg_end
<< PAGE_CACHE_SHIFT
;
739 truncate_inode_pages_range(mapping
, blk_start
,
743 ret
= truncate_hole(inode
, pg_start
, pg_end
);
751 static int expand_inode_data(struct inode
*inode
, loff_t offset
,
752 loff_t len
, int mode
)
754 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
755 pgoff_t index
, pg_start
, pg_end
;
756 loff_t new_size
= i_size_read(inode
);
757 loff_t off_start
, off_end
;
760 f2fs_balance_fs(sbi
);
762 ret
= inode_newsize_ok(inode
, (len
+ offset
));
766 if (f2fs_has_inline_data(inode
)) {
767 ret
= f2fs_convert_inline_inode(inode
);
772 pg_start
= ((unsigned long long) offset
) >> PAGE_CACHE_SHIFT
;
773 pg_end
= ((unsigned long long) offset
+ len
) >> PAGE_CACHE_SHIFT
;
775 off_start
= offset
& (PAGE_CACHE_SIZE
- 1);
776 off_end
= (offset
+ len
) & (PAGE_CACHE_SIZE
- 1);
780 for (index
= pg_start
; index
<= pg_end
; index
++) {
781 struct dnode_of_data dn
;
783 if (index
== pg_end
&& !off_end
)
786 set_new_dnode(&dn
, inode
, NULL
, NULL
, 0);
787 ret
= f2fs_reserve_block(&dn
, index
);
791 if (pg_start
== pg_end
)
792 new_size
= offset
+ len
;
793 else if (index
== pg_start
&& off_start
)
794 new_size
= (index
+ 1) << PAGE_CACHE_SHIFT
;
795 else if (index
== pg_end
)
796 new_size
= (index
<< PAGE_CACHE_SHIFT
) + off_end
;
798 new_size
+= PAGE_CACHE_SIZE
;
801 if (!(mode
& FALLOC_FL_KEEP_SIZE
) &&
802 i_size_read(inode
) < new_size
) {
803 i_size_write(inode
, new_size
);
804 mark_inode_dirty(inode
);
805 update_inode_page(inode
);
812 static long f2fs_fallocate(struct file
*file
, int mode
,
813 loff_t offset
, loff_t len
)
815 struct inode
*inode
= file_inode(file
);
818 if (mode
& ~(FALLOC_FL_KEEP_SIZE
| FALLOC_FL_PUNCH_HOLE
))
821 mutex_lock(&inode
->i_mutex
);
823 if (mode
& FALLOC_FL_PUNCH_HOLE
)
824 ret
= punch_hole(inode
, offset
, len
);
826 ret
= expand_inode_data(inode
, offset
, len
, mode
);
829 inode
->i_mtime
= inode
->i_ctime
= CURRENT_TIME
;
830 mark_inode_dirty(inode
);
833 mutex_unlock(&inode
->i_mutex
);
835 trace_f2fs_fallocate(inode
, mode
, offset
, len
, ret
);
839 static int f2fs_release_file(struct inode
*inode
, struct file
*filp
)
841 /* some remained atomic pages should discarded */
842 if (f2fs_is_atomic_file(inode
))
843 commit_inmem_pages(inode
, true);
844 if (f2fs_is_volatile_file(inode
)) {
845 set_inode_flag(F2FS_I(inode
), FI_DROP_CACHE
);
846 filemap_fdatawrite(inode
->i_mapping
);
847 clear_inode_flag(F2FS_I(inode
), FI_DROP_CACHE
);
852 #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL))
853 #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL)
855 static inline __u32
f2fs_mask_flags(umode_t mode
, __u32 flags
)
859 else if (S_ISREG(mode
))
860 return flags
& F2FS_REG_FLMASK
;
862 return flags
& F2FS_OTHER_FLMASK
;
865 static int f2fs_ioc_getflags(struct file
*filp
, unsigned long arg
)
867 struct inode
*inode
= file_inode(filp
);
868 struct f2fs_inode_info
*fi
= F2FS_I(inode
);
869 unsigned int flags
= fi
->i_flags
& FS_FL_USER_VISIBLE
;
870 return put_user(flags
, (int __user
*)arg
);
873 static int f2fs_ioc_setflags(struct file
*filp
, unsigned long arg
)
875 struct inode
*inode
= file_inode(filp
);
876 struct f2fs_inode_info
*fi
= F2FS_I(inode
);
877 unsigned int flags
= fi
->i_flags
& FS_FL_USER_VISIBLE
;
878 unsigned int oldflags
;
881 ret
= mnt_want_write_file(filp
);
885 if (!inode_owner_or_capable(inode
)) {
890 if (get_user(flags
, (int __user
*)arg
)) {
895 flags
= f2fs_mask_flags(inode
->i_mode
, flags
);
897 mutex_lock(&inode
->i_mutex
);
899 oldflags
= fi
->i_flags
;
901 if ((flags
^ oldflags
) & (FS_APPEND_FL
| FS_IMMUTABLE_FL
)) {
902 if (!capable(CAP_LINUX_IMMUTABLE
)) {
903 mutex_unlock(&inode
->i_mutex
);
909 flags
= flags
& FS_FL_USER_MODIFIABLE
;
910 flags
|= oldflags
& ~FS_FL_USER_MODIFIABLE
;
912 mutex_unlock(&inode
->i_mutex
);
914 f2fs_set_inode_flags(inode
);
915 inode
->i_ctime
= CURRENT_TIME
;
916 mark_inode_dirty(inode
);
918 mnt_drop_write_file(filp
);
922 static int f2fs_ioc_start_atomic_write(struct file
*filp
)
924 struct inode
*inode
= file_inode(filp
);
926 if (!inode_owner_or_capable(inode
))
929 f2fs_balance_fs(F2FS_I_SB(inode
));
931 if (f2fs_is_atomic_file(inode
))
934 set_inode_flag(F2FS_I(inode
), FI_ATOMIC_FILE
);
936 return f2fs_convert_inline_inode(inode
);
939 static int f2fs_ioc_commit_atomic_write(struct file
*filp
)
941 struct inode
*inode
= file_inode(filp
);
944 if (!inode_owner_or_capable(inode
))
947 if (f2fs_is_volatile_file(inode
))
950 ret
= mnt_want_write_file(filp
);
954 if (f2fs_is_atomic_file(inode
))
955 commit_inmem_pages(inode
, false);
957 ret
= f2fs_sync_file(filp
, 0, LONG_MAX
, 0);
958 mnt_drop_write_file(filp
);
959 clear_inode_flag(F2FS_I(inode
), FI_ATOMIC_FILE
);
963 static int f2fs_ioc_start_volatile_write(struct file
*filp
)
965 struct inode
*inode
= file_inode(filp
);
967 if (!inode_owner_or_capable(inode
))
970 if (f2fs_is_volatile_file(inode
))
973 set_inode_flag(F2FS_I(inode
), FI_VOLATILE_FILE
);
975 return f2fs_convert_inline_inode(inode
);
978 static int f2fs_ioc_release_volatile_write(struct file
*filp
)
980 struct inode
*inode
= file_inode(filp
);
982 if (!inode_owner_or_capable(inode
))
985 if (!f2fs_is_volatile_file(inode
))
988 punch_hole(inode
, 0, F2FS_BLKSIZE
);
992 static int f2fs_ioc_abort_volatile_write(struct file
*filp
)
994 struct inode
*inode
= file_inode(filp
);
997 if (!inode_owner_or_capable(inode
))
1000 ret
= mnt_want_write_file(filp
);
1004 f2fs_balance_fs(F2FS_I_SB(inode
));
1006 if (f2fs_is_atomic_file(inode
)) {
1007 commit_inmem_pages(inode
, false);
1008 clear_inode_flag(F2FS_I(inode
), FI_ATOMIC_FILE
);
1011 if (f2fs_is_volatile_file(inode
)) {
1012 clear_inode_flag(F2FS_I(inode
), FI_VOLATILE_FILE
);
1013 filemap_fdatawrite(inode
->i_mapping
);
1014 set_inode_flag(F2FS_I(inode
), FI_VOLATILE_FILE
);
1016 mnt_drop_write_file(filp
);
1020 static int f2fs_ioc_fitrim(struct file
*filp
, unsigned long arg
)
1022 struct inode
*inode
= file_inode(filp
);
1023 struct super_block
*sb
= inode
->i_sb
;
1024 struct request_queue
*q
= bdev_get_queue(sb
->s_bdev
);
1025 struct fstrim_range range
;
1028 if (!capable(CAP_SYS_ADMIN
))
1031 if (!blk_queue_discard(q
))
1034 if (copy_from_user(&range
, (struct fstrim_range __user
*)arg
,
1038 range
.minlen
= max((unsigned int)range
.minlen
,
1039 q
->limits
.discard_granularity
);
1040 ret
= f2fs_trim_fs(F2FS_SB(sb
), &range
);
1044 if (copy_to_user((struct fstrim_range __user
*)arg
, &range
,
1050 long f2fs_ioctl(struct file
*filp
, unsigned int cmd
, unsigned long arg
)
1053 case F2FS_IOC_GETFLAGS
:
1054 return f2fs_ioc_getflags(filp
, arg
);
1055 case F2FS_IOC_SETFLAGS
:
1056 return f2fs_ioc_setflags(filp
, arg
);
1057 case F2FS_IOC_START_ATOMIC_WRITE
:
1058 return f2fs_ioc_start_atomic_write(filp
);
1059 case F2FS_IOC_COMMIT_ATOMIC_WRITE
:
1060 return f2fs_ioc_commit_atomic_write(filp
);
1061 case F2FS_IOC_START_VOLATILE_WRITE
:
1062 return f2fs_ioc_start_volatile_write(filp
);
1063 case F2FS_IOC_RELEASE_VOLATILE_WRITE
:
1064 return f2fs_ioc_release_volatile_write(filp
);
1065 case F2FS_IOC_ABORT_VOLATILE_WRITE
:
1066 return f2fs_ioc_abort_volatile_write(filp
);
1068 return f2fs_ioc_fitrim(filp
, arg
);
1074 #ifdef CONFIG_COMPAT
1075 long f2fs_compat_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
1078 case F2FS_IOC32_GETFLAGS
:
1079 cmd
= F2FS_IOC_GETFLAGS
;
1081 case F2FS_IOC32_SETFLAGS
:
1082 cmd
= F2FS_IOC_SETFLAGS
;
1085 return -ENOIOCTLCMD
;
1087 return f2fs_ioctl(file
, cmd
, (unsigned long) compat_ptr(arg
));
1091 const struct file_operations f2fs_file_operations
= {
1092 .llseek
= f2fs_llseek
,
1093 .read
= new_sync_read
,
1094 .write
= new_sync_write
,
1095 .read_iter
= generic_file_read_iter
,
1096 .write_iter
= generic_file_write_iter
,
1097 .open
= generic_file_open
,
1098 .release
= f2fs_release_file
,
1099 .mmap
= f2fs_file_mmap
,
1100 .fsync
= f2fs_sync_file
,
1101 .fallocate
= f2fs_fallocate
,
1102 .unlocked_ioctl
= f2fs_ioctl
,
1103 #ifdef CONFIG_COMPAT
1104 .compat_ioctl
= f2fs_compat_ioctl
,
1106 .splice_read
= generic_file_splice_read
,
1107 .splice_write
= iter_file_splice_write
,