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>
30 #include <trace/events/f2fs.h>
32 static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma,
35 struct page *page = vmf->page;
36 struct inode *inode = file_inode(vma->vm_file);
37 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
38 struct dnode_of_data dn;
43 sb_start_pagefault(inode->i_sb);
45 f2fs_bug_on(sbi, f2fs_has_inline_data(inode));
47 /* block allocation */
49 set_new_dnode(&dn, inode, NULL, NULL, 0);
50 err = f2fs_reserve_block(&dn, page->index);
58 file_update_time(vma->vm_file);
60 if (unlikely(page->mapping != inode->i_mapping ||
61 page_offset(page) > i_size_read(inode) ||
62 !PageUptodate(page))) {
69 * check to see if the page is mapped already (no holes)
71 if (PageMappedToDisk(page))
74 /* page is wholly or partially inside EOF */
75 if (((page->index + 1) << PAGE_CACHE_SHIFT) > i_size_read(inode)) {
77 offset = i_size_read(inode) & ~PAGE_CACHE_MASK;
78 zero_user_segment(page, offset, PAGE_CACHE_SIZE);
81 SetPageUptodate(page);
83 trace_f2fs_vm_page_mkwrite(page, DATA);
86 f2fs_wait_on_page_writeback(page, DATA);
88 sb_end_pagefault(inode->i_sb);
89 return block_page_mkwrite_return(err);
92 static const struct vm_operations_struct f2fs_file_vm_ops = {
93 .fault = filemap_fault,
94 .map_pages = filemap_map_pages,
95 .page_mkwrite = f2fs_vm_page_mkwrite,
96 .remap_pages = generic_file_remap_pages,
99 static int get_parent_ino(struct inode *inode, nid_t *pino)
101 struct dentry *dentry;
103 inode = igrab(inode);
104 dentry = d_find_any_alias(inode);
109 if (update_dent_inode(inode, &dentry->d_name)) {
114 *pino = parent_ino(dentry);
119 static inline bool need_do_checkpoint(struct inode *inode)
121 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
122 bool need_cp = false;
124 if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1)
126 else if (file_wrong_pino(inode))
128 else if (!space_for_roll_forward(sbi))
130 else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino))
132 else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi)))
134 else if (test_opt(sbi, FASTBOOT))
136 else if (sbi->active_logs == 2)
142 static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino)
144 struct page *i = find_get_page(NODE_MAPPING(sbi), ino);
146 /* But we need to avoid that there are some inode updates */
147 if ((i && PageDirty(i)) || need_inode_block_update(sbi, ino))
153 static void try_to_fix_pino(struct inode *inode)
155 struct f2fs_inode_info *fi = F2FS_I(inode);
158 down_write(&fi->i_sem);
160 if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
161 get_parent_ino(inode, &pino)) {
163 file_got_pino(inode);
164 up_write(&fi->i_sem);
166 mark_inode_dirty_sync(inode);
167 f2fs_write_inode(inode, NULL);
169 up_write(&fi->i_sem);
173 int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
175 struct inode *inode = file->f_mapping->host;
176 struct f2fs_inode_info *fi = F2FS_I(inode);
177 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
178 nid_t ino = inode->i_ino;
180 bool need_cp = false;
181 struct writeback_control wbc = {
182 .sync_mode = WB_SYNC_ALL,
183 .nr_to_write = LONG_MAX,
187 if (unlikely(f2fs_readonly(inode->i_sb)))
190 trace_f2fs_sync_file_enter(inode);
192 /* if fdatasync is triggered, let's do in-place-update */
193 if (get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks)
194 set_inode_flag(fi, FI_NEED_IPU);
195 ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
196 clear_inode_flag(fi, FI_NEED_IPU);
199 trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
203 /* if the inode is dirty, let's recover all the time */
204 if (!datasync && is_inode_flag_set(fi, FI_DIRTY_INODE)) {
205 update_inode_page(inode);
210 * if there is no written data, don't waste time to write recovery info.
212 if (!is_inode_flag_set(fi, FI_APPEND_WRITE) &&
213 !exist_written_data(sbi, ino, APPEND_INO)) {
215 /* it may call write_inode just prior to fsync */
216 if (need_inode_page_update(sbi, ino))
219 if (is_inode_flag_set(fi, FI_UPDATE_WRITE) ||
220 exist_written_data(sbi, ino, UPDATE_INO))
225 /* guarantee free sections for fsync */
226 f2fs_balance_fs(sbi);
229 * Both of fdatasync() and fsync() are able to be recovered from
232 down_read(&fi->i_sem);
233 need_cp = need_do_checkpoint(inode);
237 /* all the dirty node pages should be flushed for POR */
238 ret = f2fs_sync_fs(inode->i_sb, 1);
241 * We've secured consistency through sync_fs. Following pino
242 * will be used only for fsynced inodes after checkpoint.
244 try_to_fix_pino(inode);
248 sync_node_pages(sbi, ino, &wbc);
250 /* if cp_error was enabled, we should avoid infinite loop */
251 if (unlikely(f2fs_cp_error(sbi)))
254 if (need_inode_block_update(sbi, ino)) {
255 mark_inode_dirty_sync(inode);
256 f2fs_write_inode(inode, NULL);
260 ret = wait_on_node_pages_writeback(sbi, ino);
264 /* once recovery info is written, don't need to tack this */
265 remove_dirty_inode(sbi, ino, APPEND_INO);
266 clear_inode_flag(fi, FI_APPEND_WRITE);
268 remove_dirty_inode(sbi, ino, UPDATE_INO);
269 clear_inode_flag(fi, FI_UPDATE_WRITE);
270 ret = f2fs_issue_flush(sbi);
272 trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
273 f2fs_trace_ios(NULL, NULL, 1);
277 static pgoff_t __get_first_dirty_index(struct address_space *mapping,
278 pgoff_t pgofs, int whence)
283 if (whence != SEEK_DATA)
286 /* find first dirty page index */
287 pagevec_init(&pvec, 0);
288 nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs,
289 PAGECACHE_TAG_DIRTY, 1);
290 pgofs = nr_pages ? pvec.pages[0]->index : LONG_MAX;
291 pagevec_release(&pvec);
295 static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs,
300 if ((blkaddr == NEW_ADDR && dirty == pgofs) ||
301 (blkaddr != NEW_ADDR && blkaddr != NULL_ADDR))
305 if (blkaddr == NULL_ADDR)
312 static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
314 struct inode *inode = file->f_mapping->host;
315 loff_t maxbytes = inode->i_sb->s_maxbytes;
316 struct dnode_of_data dn;
317 pgoff_t pgofs, end_offset, dirty;
318 loff_t data_ofs = offset;
322 mutex_lock(&inode->i_mutex);
324 isize = i_size_read(inode);
328 /* handle inline data case */
329 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {
330 if (whence == SEEK_HOLE)
335 pgofs = (pgoff_t)(offset >> PAGE_CACHE_SHIFT);
337 dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence);
339 for (; data_ofs < isize; data_ofs = pgofs << PAGE_CACHE_SHIFT) {
340 set_new_dnode(&dn, inode, NULL, NULL, 0);
341 err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE_RA);
342 if (err && err != -ENOENT) {
344 } else if (err == -ENOENT) {
345 /* direct node does not exists */
346 if (whence == SEEK_DATA) {
347 pgofs = PGOFS_OF_NEXT_DNODE(pgofs,
355 end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode));
357 /* find data/hole in dnode block */
358 for (; dn.ofs_in_node < end_offset;
359 dn.ofs_in_node++, pgofs++,
360 data_ofs = (loff_t)pgofs << PAGE_CACHE_SHIFT) {
362 blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node);
364 if (__found_offset(blkaddr, dirty, pgofs, whence)) {
372 if (whence == SEEK_DATA)
375 if (whence == SEEK_HOLE && data_ofs > isize)
377 mutex_unlock(&inode->i_mutex);
378 return vfs_setpos(file, data_ofs, maxbytes);
380 mutex_unlock(&inode->i_mutex);
384 static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence)
386 struct inode *inode = file->f_mapping->host;
387 loff_t maxbytes = inode->i_sb->s_maxbytes;
393 return generic_file_llseek_size(file, offset, whence,
394 maxbytes, i_size_read(inode));
399 return f2fs_seek_block(file, offset, whence);
405 static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma)
407 struct inode *inode = file_inode(file);
409 /* we don't need to use inline_data strictly */
410 if (f2fs_has_inline_data(inode)) {
411 int err = f2fs_convert_inline_inode(inode);
417 vma->vm_ops = &f2fs_file_vm_ops;
421 int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
423 int nr_free = 0, ofs = dn->ofs_in_node;
424 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
425 struct f2fs_node *raw_node;
428 raw_node = F2FS_NODE(dn->node_page);
429 addr = blkaddr_in_node(raw_node) + ofs;
431 for (; count > 0; count--, addr++, dn->ofs_in_node++) {
432 block_t blkaddr = le32_to_cpu(*addr);
433 if (blkaddr == NULL_ADDR)
436 dn->data_blkaddr = NULL_ADDR;
437 update_extent_cache(dn);
438 invalidate_blocks(sbi, blkaddr);
442 dec_valid_block_count(sbi, dn->inode, nr_free);
443 set_page_dirty(dn->node_page);
446 dn->ofs_in_node = ofs;
448 trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
449 dn->ofs_in_node, nr_free);
453 void truncate_data_blocks(struct dnode_of_data *dn)
455 truncate_data_blocks_range(dn, ADDRS_PER_BLOCK);
458 static int truncate_partial_data_page(struct inode *inode, u64 from)
460 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
466 page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, false);
471 if (unlikely(!PageUptodate(page) ||
472 page->mapping != inode->i_mapping))
475 f2fs_wait_on_page_writeback(page, DATA);
476 zero_user(page, offset, PAGE_CACHE_SIZE - offset);
477 set_page_dirty(page);
479 f2fs_put_page(page, 1);
483 int truncate_blocks(struct inode *inode, u64 from, bool lock)
485 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
486 unsigned int blocksize = inode->i_sb->s_blocksize;
487 struct dnode_of_data dn;
489 int count = 0, err = 0;
492 trace_f2fs_truncate_blocks_enter(inode, from);
494 free_from = (pgoff_t)F2FS_BYTES_TO_BLK(from + blocksize - 1);
499 ipage = get_node_page(sbi, inode->i_ino);
501 err = PTR_ERR(ipage);
505 if (f2fs_has_inline_data(inode)) {
506 f2fs_put_page(ipage, 1);
510 set_new_dnode(&dn, inode, ipage, NULL, 0);
511 err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE);
518 count = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode));
520 count -= dn.ofs_in_node;
521 f2fs_bug_on(sbi, count < 0);
523 if (dn.ofs_in_node || IS_INODE(dn.node_page)) {
524 truncate_data_blocks_range(&dn, count);
530 err = truncate_inode_blocks(inode, free_from);
535 /* lastly zero out the first data page */
537 err = truncate_partial_data_page(inode, from);
539 trace_f2fs_truncate_blocks_exit(inode, err);
543 void f2fs_truncate(struct inode *inode)
545 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
546 S_ISLNK(inode->i_mode)))
549 trace_f2fs_truncate(inode);
551 /* we should check inline_data size */
552 if (f2fs_has_inline_data(inode) && !f2fs_may_inline(inode)) {
553 if (f2fs_convert_inline_inode(inode))
557 if (!truncate_blocks(inode, i_size_read(inode), true)) {
558 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
559 mark_inode_dirty(inode);
563 int f2fs_getattr(struct vfsmount *mnt,
564 struct dentry *dentry, struct kstat *stat)
566 struct inode *inode = dentry->d_inode;
567 generic_fillattr(inode, stat);
572 #ifdef CONFIG_F2FS_FS_POSIX_ACL
573 static void __setattr_copy(struct inode *inode, const struct iattr *attr)
575 struct f2fs_inode_info *fi = F2FS_I(inode);
576 unsigned int ia_valid = attr->ia_valid;
578 if (ia_valid & ATTR_UID)
579 inode->i_uid = attr->ia_uid;
580 if (ia_valid & ATTR_GID)
581 inode->i_gid = attr->ia_gid;
582 if (ia_valid & ATTR_ATIME)
583 inode->i_atime = timespec_trunc(attr->ia_atime,
584 inode->i_sb->s_time_gran);
585 if (ia_valid & ATTR_MTIME)
586 inode->i_mtime = timespec_trunc(attr->ia_mtime,
587 inode->i_sb->s_time_gran);
588 if (ia_valid & ATTR_CTIME)
589 inode->i_ctime = timespec_trunc(attr->ia_ctime,
590 inode->i_sb->s_time_gran);
591 if (ia_valid & ATTR_MODE) {
592 umode_t mode = attr->ia_mode;
594 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
596 set_acl_inode(fi, mode);
600 #define __setattr_copy setattr_copy
603 int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
605 struct inode *inode = dentry->d_inode;
606 struct f2fs_inode_info *fi = F2FS_I(inode);
609 err = inode_change_ok(inode, attr);
613 if (attr->ia_valid & ATTR_SIZE) {
614 if (attr->ia_size != i_size_read(inode)) {
615 truncate_setsize(inode, attr->ia_size);
616 f2fs_truncate(inode);
617 f2fs_balance_fs(F2FS_I_SB(inode));
620 * giving a chance to truncate blocks past EOF which
621 * are fallocated with FALLOC_FL_KEEP_SIZE.
623 f2fs_truncate(inode);
627 __setattr_copy(inode, attr);
629 if (attr->ia_valid & ATTR_MODE) {
630 err = posix_acl_chmod(inode, get_inode_mode(inode));
631 if (err || is_inode_flag_set(fi, FI_ACL_MODE)) {
632 inode->i_mode = fi->i_acl_mode;
633 clear_inode_flag(fi, FI_ACL_MODE);
637 mark_inode_dirty(inode);
641 const struct inode_operations f2fs_file_inode_operations = {
642 .getattr = f2fs_getattr,
643 .setattr = f2fs_setattr,
644 .get_acl = f2fs_get_acl,
645 .set_acl = f2fs_set_acl,
646 #ifdef CONFIG_F2FS_FS_XATTR
647 .setxattr = generic_setxattr,
648 .getxattr = generic_getxattr,
649 .listxattr = f2fs_listxattr,
650 .removexattr = generic_removexattr,
652 .fiemap = f2fs_fiemap,
655 static void fill_zero(struct inode *inode, pgoff_t index,
656 loff_t start, loff_t len)
658 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
664 f2fs_balance_fs(sbi);
667 page = get_new_data_page(inode, NULL, index, false);
671 f2fs_wait_on_page_writeback(page, DATA);
672 zero_user(page, start, len);
673 set_page_dirty(page);
674 f2fs_put_page(page, 1);
678 int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
683 for (index = pg_start; index < pg_end; index++) {
684 struct dnode_of_data dn;
686 set_new_dnode(&dn, inode, NULL, NULL, 0);
687 err = get_dnode_of_data(&dn, index, LOOKUP_NODE);
694 if (dn.data_blkaddr != NULL_ADDR)
695 truncate_data_blocks_range(&dn, 1);
701 static int punch_hole(struct inode *inode, loff_t offset, loff_t len)
703 pgoff_t pg_start, pg_end;
704 loff_t off_start, off_end;
707 if (!S_ISREG(inode->i_mode))
710 /* skip punching hole beyond i_size */
711 if (offset >= inode->i_size)
714 if (f2fs_has_inline_data(inode)) {
715 ret = f2fs_convert_inline_inode(inode);
720 pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT;
721 pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT;
723 off_start = offset & (PAGE_CACHE_SIZE - 1);
724 off_end = (offset + len) & (PAGE_CACHE_SIZE - 1);
726 if (pg_start == pg_end) {
727 fill_zero(inode, pg_start, off_start,
728 off_end - off_start);
731 fill_zero(inode, pg_start++, off_start,
732 PAGE_CACHE_SIZE - off_start);
734 fill_zero(inode, pg_end, 0, off_end);
736 if (pg_start < pg_end) {
737 struct address_space *mapping = inode->i_mapping;
738 loff_t blk_start, blk_end;
739 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
741 f2fs_balance_fs(sbi);
743 blk_start = pg_start << PAGE_CACHE_SHIFT;
744 blk_end = pg_end << PAGE_CACHE_SHIFT;
745 truncate_inode_pages_range(mapping, blk_start,
749 ret = truncate_hole(inode, pg_start, pg_end);
757 static int expand_inode_data(struct inode *inode, loff_t offset,
758 loff_t len, int mode)
760 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
761 pgoff_t index, pg_start, pg_end;
762 loff_t new_size = i_size_read(inode);
763 loff_t off_start, off_end;
766 f2fs_balance_fs(sbi);
768 ret = inode_newsize_ok(inode, (len + offset));
772 if (f2fs_has_inline_data(inode)) {
773 ret = f2fs_convert_inline_inode(inode);
778 pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT;
779 pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT;
781 off_start = offset & (PAGE_CACHE_SIZE - 1);
782 off_end = (offset + len) & (PAGE_CACHE_SIZE - 1);
786 for (index = pg_start; index <= pg_end; index++) {
787 struct dnode_of_data dn;
789 if (index == pg_end && !off_end)
792 set_new_dnode(&dn, inode, NULL, NULL, 0);
793 ret = f2fs_reserve_block(&dn, index);
797 if (pg_start == pg_end)
798 new_size = offset + len;
799 else if (index == pg_start && off_start)
800 new_size = (index + 1) << PAGE_CACHE_SHIFT;
801 else if (index == pg_end)
802 new_size = (index << PAGE_CACHE_SHIFT) + off_end;
804 new_size += PAGE_CACHE_SIZE;
807 if (!(mode & FALLOC_FL_KEEP_SIZE) &&
808 i_size_read(inode) < new_size) {
809 i_size_write(inode, new_size);
810 mark_inode_dirty(inode);
811 update_inode_page(inode);
818 static long f2fs_fallocate(struct file *file, int mode,
819 loff_t offset, loff_t len)
821 struct inode *inode = file_inode(file);
824 if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
827 mutex_lock(&inode->i_mutex);
829 if (mode & FALLOC_FL_PUNCH_HOLE)
830 ret = punch_hole(inode, offset, len);
832 ret = expand_inode_data(inode, offset, len, mode);
835 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
836 mark_inode_dirty(inode);
839 mutex_unlock(&inode->i_mutex);
841 trace_f2fs_fallocate(inode, mode, offset, len, ret);
845 static int f2fs_release_file(struct inode *inode, struct file *filp)
847 /* some remained atomic pages should discarded */
848 if (f2fs_is_atomic_file(inode))
849 commit_inmem_pages(inode, true);
850 if (f2fs_is_volatile_file(inode)) {
851 set_inode_flag(F2FS_I(inode), FI_DROP_CACHE);
852 filemap_fdatawrite(inode->i_mapping);
853 clear_inode_flag(F2FS_I(inode), FI_DROP_CACHE);
858 #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL))
859 #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL)
861 static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags)
865 else if (S_ISREG(mode))
866 return flags & F2FS_REG_FLMASK;
868 return flags & F2FS_OTHER_FLMASK;
871 static int f2fs_ioc_getflags(struct file *filp, unsigned long arg)
873 struct inode *inode = file_inode(filp);
874 struct f2fs_inode_info *fi = F2FS_I(inode);
875 unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE;
876 return put_user(flags, (int __user *)arg);
879 static int f2fs_ioc_setflags(struct file *filp, unsigned long arg)
881 struct inode *inode = file_inode(filp);
882 struct f2fs_inode_info *fi = F2FS_I(inode);
883 unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE;
884 unsigned int oldflags;
887 ret = mnt_want_write_file(filp);
891 if (!inode_owner_or_capable(inode)) {
896 if (get_user(flags, (int __user *)arg)) {
901 flags = f2fs_mask_flags(inode->i_mode, flags);
903 mutex_lock(&inode->i_mutex);
905 oldflags = fi->i_flags;
907 if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) {
908 if (!capable(CAP_LINUX_IMMUTABLE)) {
909 mutex_unlock(&inode->i_mutex);
915 flags = flags & FS_FL_USER_MODIFIABLE;
916 flags |= oldflags & ~FS_FL_USER_MODIFIABLE;
918 mutex_unlock(&inode->i_mutex);
920 f2fs_set_inode_flags(inode);
921 inode->i_ctime = CURRENT_TIME;
922 mark_inode_dirty(inode);
924 mnt_drop_write_file(filp);
928 static int f2fs_ioc_getversion(struct file *filp, unsigned long arg)
930 struct inode *inode = file_inode(filp);
932 return put_user(inode->i_generation, (int __user *)arg);
935 static int f2fs_ioc_start_atomic_write(struct file *filp)
937 struct inode *inode = file_inode(filp);
939 if (!inode_owner_or_capable(inode))
942 f2fs_balance_fs(F2FS_I_SB(inode));
944 if (f2fs_is_atomic_file(inode))
947 set_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);
949 return f2fs_convert_inline_inode(inode);
952 static int f2fs_ioc_commit_atomic_write(struct file *filp)
954 struct inode *inode = file_inode(filp);
957 if (!inode_owner_or_capable(inode))
960 if (f2fs_is_volatile_file(inode))
963 ret = mnt_want_write_file(filp);
967 if (f2fs_is_atomic_file(inode))
968 commit_inmem_pages(inode, false);
970 ret = f2fs_sync_file(filp, 0, LONG_MAX, 0);
971 mnt_drop_write_file(filp);
972 clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);
976 static int f2fs_ioc_start_volatile_write(struct file *filp)
978 struct inode *inode = file_inode(filp);
980 if (!inode_owner_or_capable(inode))
983 if (f2fs_is_volatile_file(inode))
986 set_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE);
988 return f2fs_convert_inline_inode(inode);
991 static int f2fs_ioc_release_volatile_write(struct file *filp)
993 struct inode *inode = file_inode(filp);
995 if (!inode_owner_or_capable(inode))
998 if (!f2fs_is_volatile_file(inode))
1001 punch_hole(inode, 0, F2FS_BLKSIZE);
1005 static int f2fs_ioc_abort_volatile_write(struct file *filp)
1007 struct inode *inode = file_inode(filp);
1010 if (!inode_owner_or_capable(inode))
1013 ret = mnt_want_write_file(filp);
1017 f2fs_balance_fs(F2FS_I_SB(inode));
1019 if (f2fs_is_atomic_file(inode)) {
1020 commit_inmem_pages(inode, false);
1021 clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);
1024 if (f2fs_is_volatile_file(inode)) {
1025 clear_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE);
1026 filemap_fdatawrite(inode->i_mapping);
1027 set_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE);
1029 mnt_drop_write_file(filp);
1033 static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg)
1035 struct inode *inode = file_inode(filp);
1036 struct super_block *sb = inode->i_sb;
1037 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1038 struct fstrim_range range;
1041 if (!capable(CAP_SYS_ADMIN))
1044 if (!blk_queue_discard(q))
1047 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
1051 range.minlen = max((unsigned int)range.minlen,
1052 q->limits.discard_granularity);
1053 ret = f2fs_trim_fs(F2FS_SB(sb), &range);
1057 if (copy_to_user((struct fstrim_range __user *)arg, &range,
1063 long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1066 case F2FS_IOC_GETFLAGS:
1067 return f2fs_ioc_getflags(filp, arg);
1068 case F2FS_IOC_SETFLAGS:
1069 return f2fs_ioc_setflags(filp, arg);
1070 case F2FS_IOC_GETVERSION:
1071 return f2fs_ioc_getversion(filp, arg);
1072 case F2FS_IOC_START_ATOMIC_WRITE:
1073 return f2fs_ioc_start_atomic_write(filp);
1074 case F2FS_IOC_COMMIT_ATOMIC_WRITE:
1075 return f2fs_ioc_commit_atomic_write(filp);
1076 case F2FS_IOC_START_VOLATILE_WRITE:
1077 return f2fs_ioc_start_volatile_write(filp);
1078 case F2FS_IOC_RELEASE_VOLATILE_WRITE:
1079 return f2fs_ioc_release_volatile_write(filp);
1080 case F2FS_IOC_ABORT_VOLATILE_WRITE:
1081 return f2fs_ioc_abort_volatile_write(filp);
1083 return f2fs_ioc_fitrim(filp, arg);
1089 #ifdef CONFIG_COMPAT
1090 long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1093 case F2FS_IOC32_GETFLAGS:
1094 cmd = F2FS_IOC_GETFLAGS;
1096 case F2FS_IOC32_SETFLAGS:
1097 cmd = F2FS_IOC_SETFLAGS;
1100 return -ENOIOCTLCMD;
1102 return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
1106 const struct file_operations f2fs_file_operations = {
1107 .llseek = f2fs_llseek,
1108 .read = new_sync_read,
1109 .write = new_sync_write,
1110 .read_iter = generic_file_read_iter,
1111 .write_iter = generic_file_write_iter,
1112 .open = generic_file_open,
1113 .release = f2fs_release_file,
1114 .mmap = f2fs_file_mmap,
1115 .fsync = f2fs_sync_file,
1116 .fallocate = f2fs_fallocate,
1117 .unlocked_ioctl = f2fs_ioctl,
1118 #ifdef CONFIG_COMPAT
1119 .compat_ioctl = f2fs_compat_ioctl,
1121 .splice_read = generic_file_splice_read,
1122 .splice_write = iter_file_splice_write,