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>
23 #include <linux/uuid.h>
32 #include <trace/events/f2fs.h>
34 static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma,
37 struct page *page = vmf->page;
38 struct inode *inode = file_inode(vma->vm_file);
39 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
40 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 f2fs_balance_fs(sbi, dn.node_changed);
60 file_update_time(vma->vm_file);
62 if (unlikely(page->mapping != inode->i_mapping ||
63 page_offset(page) > i_size_read(inode) ||
64 !PageUptodate(page))) {
71 * check to see if the page is mapped already (no holes)
73 if (PageMappedToDisk(page))
76 /* page is wholly or partially inside EOF */
77 if (((loff_t)(page->index + 1) << PAGE_SHIFT) >
80 offset = i_size_read(inode) & ~PAGE_MASK;
81 zero_user_segment(page, offset, PAGE_SIZE);
84 if (!PageUptodate(page))
85 SetPageUptodate(page);
87 trace_f2fs_vm_page_mkwrite(page, DATA);
90 f2fs_wait_on_page_writeback(page, DATA, false);
92 /* wait for GCed encrypted page writeback */
93 if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode))
94 f2fs_wait_on_encrypted_page_writeback(sbi, dn.data_blkaddr);
96 /* if gced page is attached, don't write to cold segment */
97 clear_cold_data(page);
99 sb_end_pagefault(inode->i_sb);
100 f2fs_update_time(sbi, REQ_TIME);
101 return block_page_mkwrite_return(err);
104 static const struct vm_operations_struct f2fs_file_vm_ops = {
105 .fault = filemap_fault,
106 .map_pages = filemap_map_pages,
107 .page_mkwrite = f2fs_vm_page_mkwrite,
110 static int get_parent_ino(struct inode *inode, nid_t *pino)
112 struct dentry *dentry;
114 inode = igrab(inode);
115 dentry = d_find_any_alias(inode);
120 if (update_dent_inode(inode, inode, &dentry->d_name)) {
125 *pino = parent_ino(dentry);
130 static inline bool need_do_checkpoint(struct inode *inode)
132 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
133 bool need_cp = false;
135 if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1)
137 else if (file_enc_name(inode) && need_dentry_mark(sbi, inode->i_ino))
139 else if (file_wrong_pino(inode))
141 else if (!space_for_roll_forward(sbi))
143 else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino))
145 else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi)))
147 else if (test_opt(sbi, FASTBOOT))
149 else if (sbi->active_logs == 2)
155 static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino)
157 struct page *i = find_get_page(NODE_MAPPING(sbi), ino);
159 /* But we need to avoid that there are some inode updates */
160 if ((i && PageDirty(i)) || need_inode_block_update(sbi, ino))
166 static void try_to_fix_pino(struct inode *inode)
168 struct f2fs_inode_info *fi = F2FS_I(inode);
171 down_write(&fi->i_sem);
173 if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
174 get_parent_ino(inode, &pino)) {
175 f2fs_i_pino_write(inode, pino);
176 file_got_pino(inode);
178 up_write(&fi->i_sem);
181 static int f2fs_do_sync_file(struct file *file, loff_t start, loff_t end,
182 int datasync, bool atomic)
184 struct inode *inode = file->f_mapping->host;
185 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
186 nid_t ino = inode->i_ino;
188 bool need_cp = false;
189 struct writeback_control wbc = {
190 .sync_mode = WB_SYNC_ALL,
191 .nr_to_write = LONG_MAX,
195 if (unlikely(f2fs_readonly(inode->i_sb)))
198 trace_f2fs_sync_file_enter(inode);
200 /* if fdatasync is triggered, let's do in-place-update */
201 if (datasync || get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks)
202 set_inode_flag(inode, FI_NEED_IPU);
203 ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
204 clear_inode_flag(inode, FI_NEED_IPU);
207 trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
211 /* if the inode is dirty, let's recover all the time */
212 if (!datasync && !f2fs_skip_inode_update(inode)) {
213 f2fs_write_inode(inode, NULL);
218 * if there is no written data, don't waste time to write recovery info.
220 if (!is_inode_flag_set(inode, FI_APPEND_WRITE) &&
221 !exist_written_data(sbi, ino, APPEND_INO)) {
223 /* it may call write_inode just prior to fsync */
224 if (need_inode_page_update(sbi, ino))
227 if (is_inode_flag_set(inode, FI_UPDATE_WRITE) ||
228 exist_written_data(sbi, ino, UPDATE_INO))
234 * Both of fdatasync() and fsync() are able to be recovered from
237 down_read(&F2FS_I(inode)->i_sem);
238 need_cp = need_do_checkpoint(inode);
239 up_read(&F2FS_I(inode)->i_sem);
242 /* all the dirty node pages should be flushed for POR */
243 ret = f2fs_sync_fs(inode->i_sb, 1);
246 * We've secured consistency through sync_fs. Following pino
247 * will be used only for fsynced inodes after checkpoint.
249 try_to_fix_pino(inode);
250 clear_inode_flag(inode, FI_APPEND_WRITE);
251 clear_inode_flag(inode, FI_UPDATE_WRITE);
255 ret = fsync_node_pages(sbi, inode, &wbc, atomic);
259 /* if cp_error was enabled, we should avoid infinite loop */
260 if (unlikely(f2fs_cp_error(sbi))) {
265 if (need_inode_block_update(sbi, ino)) {
266 f2fs_mark_inode_dirty_sync(inode);
267 f2fs_write_inode(inode, NULL);
271 ret = wait_on_node_pages_writeback(sbi, ino);
275 /* once recovery info is written, don't need to tack this */
276 remove_ino_entry(sbi, ino, APPEND_INO);
277 clear_inode_flag(inode, FI_APPEND_WRITE);
279 remove_ino_entry(sbi, ino, UPDATE_INO);
280 clear_inode_flag(inode, FI_UPDATE_WRITE);
281 ret = f2fs_issue_flush(sbi);
282 f2fs_update_time(sbi, REQ_TIME);
284 trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
285 f2fs_trace_ios(NULL, 1);
289 int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
291 return f2fs_do_sync_file(file, start, end, datasync, false);
294 static pgoff_t __get_first_dirty_index(struct address_space *mapping,
295 pgoff_t pgofs, int whence)
300 if (whence != SEEK_DATA)
303 /* find first dirty page index */
304 pagevec_init(&pvec, 0);
305 nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs,
306 PAGECACHE_TAG_DIRTY, 1);
307 pgofs = nr_pages ? pvec.pages[0]->index : ULONG_MAX;
308 pagevec_release(&pvec);
312 static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs,
317 if ((blkaddr == NEW_ADDR && dirty == pgofs) ||
318 (blkaddr != NEW_ADDR && blkaddr != NULL_ADDR))
322 if (blkaddr == NULL_ADDR)
329 static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
331 struct inode *inode = file->f_mapping->host;
332 loff_t maxbytes = inode->i_sb->s_maxbytes;
333 struct dnode_of_data dn;
334 pgoff_t pgofs, end_offset, dirty;
335 loff_t data_ofs = offset;
341 isize = i_size_read(inode);
345 /* handle inline data case */
346 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {
347 if (whence == SEEK_HOLE)
352 pgofs = (pgoff_t)(offset >> PAGE_SHIFT);
354 dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence);
356 for (; data_ofs < isize; data_ofs = (loff_t)pgofs << PAGE_SHIFT) {
357 set_new_dnode(&dn, inode, NULL, NULL, 0);
358 err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE);
359 if (err && err != -ENOENT) {
361 } else if (err == -ENOENT) {
362 /* direct node does not exists */
363 if (whence == SEEK_DATA) {
364 pgofs = get_next_page_offset(&dn, pgofs);
371 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
373 /* find data/hole in dnode block */
374 for (; dn.ofs_in_node < end_offset;
375 dn.ofs_in_node++, pgofs++,
376 data_ofs = (loff_t)pgofs << PAGE_SHIFT) {
378 blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node);
380 if (__found_offset(blkaddr, dirty, pgofs, whence)) {
388 if (whence == SEEK_DATA)
391 if (whence == SEEK_HOLE && data_ofs > isize)
394 return vfs_setpos(file, data_ofs, maxbytes);
400 static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence)
402 struct inode *inode = file->f_mapping->host;
403 loff_t maxbytes = inode->i_sb->s_maxbytes;
409 return generic_file_llseek_size(file, offset, whence,
410 maxbytes, i_size_read(inode));
415 return f2fs_seek_block(file, offset, whence);
421 static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma)
423 struct inode *inode = file_inode(file);
426 if (f2fs_encrypted_inode(inode)) {
427 err = fscrypt_get_encryption_info(inode);
430 if (!f2fs_encrypted_inode(inode))
434 /* we don't need to use inline_data strictly */
435 err = f2fs_convert_inline_inode(inode);
440 vma->vm_ops = &f2fs_file_vm_ops;
444 static int f2fs_file_open(struct inode *inode, struct file *filp)
446 int ret = generic_file_open(inode, filp);
449 if (!ret && f2fs_encrypted_inode(inode)) {
450 ret = fscrypt_get_encryption_info(inode);
453 if (!fscrypt_has_encryption_key(inode))
456 dir = dget_parent(file_dentry(filp));
457 if (f2fs_encrypted_inode(d_inode(dir)) &&
458 !fscrypt_has_permitted_context(d_inode(dir), inode)) {
466 int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
468 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
469 struct f2fs_node *raw_node;
470 int nr_free = 0, ofs = dn->ofs_in_node, len = count;
473 raw_node = F2FS_NODE(dn->node_page);
474 addr = blkaddr_in_node(raw_node) + ofs;
476 for (; count > 0; count--, addr++, dn->ofs_in_node++) {
477 block_t blkaddr = le32_to_cpu(*addr);
478 if (blkaddr == NULL_ADDR)
481 dn->data_blkaddr = NULL_ADDR;
482 set_data_blkaddr(dn);
483 invalidate_blocks(sbi, blkaddr);
484 if (dn->ofs_in_node == 0 && IS_INODE(dn->node_page))
485 clear_inode_flag(dn->inode, FI_FIRST_BLOCK_WRITTEN);
492 * once we invalidate valid blkaddr in range [ofs, ofs + count],
493 * we will invalidate all blkaddr in the whole range.
495 fofs = start_bidx_of_node(ofs_of_node(dn->node_page),
497 f2fs_update_extent_cache_range(dn, fofs, 0, len);
498 dec_valid_block_count(sbi, dn->inode, nr_free);
500 dn->ofs_in_node = ofs;
502 f2fs_update_time(sbi, REQ_TIME);
503 trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
504 dn->ofs_in_node, nr_free);
508 void truncate_data_blocks(struct dnode_of_data *dn)
510 truncate_data_blocks_range(dn, ADDRS_PER_BLOCK);
513 static int truncate_partial_data_page(struct inode *inode, u64 from,
516 unsigned offset = from & (PAGE_SIZE - 1);
517 pgoff_t index = from >> PAGE_SHIFT;
518 struct address_space *mapping = inode->i_mapping;
521 if (!offset && !cache_only)
525 page = f2fs_grab_cache_page(mapping, index, false);
526 if (page && PageUptodate(page))
528 f2fs_put_page(page, 1);
532 page = get_lock_data_page(inode, index, true);
536 f2fs_wait_on_page_writeback(page, DATA, true);
537 zero_user(page, offset, PAGE_SIZE - offset);
538 if (!cache_only || !f2fs_encrypted_inode(inode) ||
539 !S_ISREG(inode->i_mode))
540 set_page_dirty(page);
541 f2fs_put_page(page, 1);
545 int truncate_blocks(struct inode *inode, u64 from, bool lock)
547 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
548 unsigned int blocksize = inode->i_sb->s_blocksize;
549 struct dnode_of_data dn;
551 int count = 0, err = 0;
553 bool truncate_page = false;
555 trace_f2fs_truncate_blocks_enter(inode, from);
557 free_from = (pgoff_t)F2FS_BYTES_TO_BLK(from + blocksize - 1);
559 if (free_from >= sbi->max_file_blocks)
565 ipage = get_node_page(sbi, inode->i_ino);
567 err = PTR_ERR(ipage);
571 if (f2fs_has_inline_data(inode)) {
572 if (truncate_inline_inode(ipage, from))
573 set_page_dirty(ipage);
574 f2fs_put_page(ipage, 1);
575 truncate_page = true;
579 set_new_dnode(&dn, inode, ipage, NULL, 0);
580 err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE_RA);
587 count = ADDRS_PER_PAGE(dn.node_page, inode);
589 count -= dn.ofs_in_node;
590 f2fs_bug_on(sbi, count < 0);
592 if (dn.ofs_in_node || IS_INODE(dn.node_page)) {
593 truncate_data_blocks_range(&dn, count);
599 err = truncate_inode_blocks(inode, free_from);
604 /* lastly zero out the first data page */
606 err = truncate_partial_data_page(inode, from, truncate_page);
608 trace_f2fs_truncate_blocks_exit(inode, err);
612 int f2fs_truncate(struct inode *inode)
616 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
617 S_ISLNK(inode->i_mode)))
620 trace_f2fs_truncate(inode);
622 /* we should check inline_data size */
623 if (!f2fs_may_inline_data(inode)) {
624 err = f2fs_convert_inline_inode(inode);
629 err = truncate_blocks(inode, i_size_read(inode), true);
633 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
634 f2fs_mark_inode_dirty_sync(inode);
638 int f2fs_getattr(struct vfsmount *mnt,
639 struct dentry *dentry, struct kstat *stat)
641 struct inode *inode = d_inode(dentry);
642 generic_fillattr(inode, stat);
647 #ifdef CONFIG_F2FS_FS_POSIX_ACL
648 static void __setattr_copy(struct inode *inode, const struct iattr *attr)
650 unsigned int ia_valid = attr->ia_valid;
652 if (ia_valid & ATTR_UID)
653 inode->i_uid = attr->ia_uid;
654 if (ia_valid & ATTR_GID)
655 inode->i_gid = attr->ia_gid;
656 if (ia_valid & ATTR_ATIME)
657 inode->i_atime = timespec_trunc(attr->ia_atime,
658 inode->i_sb->s_time_gran);
659 if (ia_valid & ATTR_MTIME)
660 inode->i_mtime = timespec_trunc(attr->ia_mtime,
661 inode->i_sb->s_time_gran);
662 if (ia_valid & ATTR_CTIME)
663 inode->i_ctime = timespec_trunc(attr->ia_ctime,
664 inode->i_sb->s_time_gran);
665 if (ia_valid & ATTR_MODE) {
666 umode_t mode = attr->ia_mode;
668 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
670 set_acl_inode(inode, mode);
674 #define __setattr_copy setattr_copy
677 int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
679 struct inode *inode = d_inode(dentry);
682 err = inode_change_ok(inode, attr);
686 if (attr->ia_valid & ATTR_SIZE) {
687 if (f2fs_encrypted_inode(inode) &&
688 fscrypt_get_encryption_info(inode))
691 if (attr->ia_size <= i_size_read(inode)) {
692 truncate_setsize(inode, attr->ia_size);
693 err = f2fs_truncate(inode);
696 f2fs_balance_fs(F2FS_I_SB(inode), true);
699 * do not trim all blocks after i_size if target size is
700 * larger than i_size.
702 truncate_setsize(inode, attr->ia_size);
704 /* should convert inline inode here */
705 if (!f2fs_may_inline_data(inode)) {
706 err = f2fs_convert_inline_inode(inode);
710 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
714 __setattr_copy(inode, attr);
716 if (attr->ia_valid & ATTR_MODE) {
717 err = posix_acl_chmod(inode, get_inode_mode(inode));
718 if (err || is_inode_flag_set(inode, FI_ACL_MODE)) {
719 inode->i_mode = F2FS_I(inode)->i_acl_mode;
720 clear_inode_flag(inode, FI_ACL_MODE);
724 f2fs_mark_inode_dirty_sync(inode);
728 const struct inode_operations f2fs_file_inode_operations = {
729 .getattr = f2fs_getattr,
730 .setattr = f2fs_setattr,
731 .get_acl = f2fs_get_acl,
732 .set_acl = f2fs_set_acl,
733 #ifdef CONFIG_F2FS_FS_XATTR
734 .setxattr = generic_setxattr,
735 .getxattr = generic_getxattr,
736 .listxattr = f2fs_listxattr,
737 .removexattr = generic_removexattr,
739 .fiemap = f2fs_fiemap,
742 static int fill_zero(struct inode *inode, pgoff_t index,
743 loff_t start, loff_t len)
745 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
751 f2fs_balance_fs(sbi, true);
754 page = get_new_data_page(inode, NULL, index, false);
758 return PTR_ERR(page);
760 f2fs_wait_on_page_writeback(page, DATA, true);
761 zero_user(page, start, len);
762 set_page_dirty(page);
763 f2fs_put_page(page, 1);
767 int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
771 while (pg_start < pg_end) {
772 struct dnode_of_data dn;
773 pgoff_t end_offset, count;
775 set_new_dnode(&dn, inode, NULL, NULL, 0);
776 err = get_dnode_of_data(&dn, pg_start, LOOKUP_NODE);
778 if (err == -ENOENT) {
785 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
786 count = min(end_offset - dn.ofs_in_node, pg_end - pg_start);
788 f2fs_bug_on(F2FS_I_SB(inode), count == 0 || count > end_offset);
790 truncate_data_blocks_range(&dn, count);
798 static int punch_hole(struct inode *inode, loff_t offset, loff_t len)
800 pgoff_t pg_start, pg_end;
801 loff_t off_start, off_end;
804 ret = f2fs_convert_inline_inode(inode);
808 pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
809 pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
811 off_start = offset & (PAGE_SIZE - 1);
812 off_end = (offset + len) & (PAGE_SIZE - 1);
814 if (pg_start == pg_end) {
815 ret = fill_zero(inode, pg_start, off_start,
816 off_end - off_start);
821 ret = fill_zero(inode, pg_start++, off_start,
822 PAGE_SIZE - off_start);
827 ret = fill_zero(inode, pg_end, 0, off_end);
832 if (pg_start < pg_end) {
833 struct address_space *mapping = inode->i_mapping;
834 loff_t blk_start, blk_end;
835 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
837 f2fs_balance_fs(sbi, true);
839 blk_start = (loff_t)pg_start << PAGE_SHIFT;
840 blk_end = (loff_t)pg_end << PAGE_SHIFT;
841 truncate_inode_pages_range(mapping, blk_start,
845 ret = truncate_hole(inode, pg_start, pg_end);
853 static int __exchange_data_block(struct inode *inode, pgoff_t src,
854 pgoff_t dst, bool full)
856 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
857 struct dnode_of_data dn;
859 bool do_replace = false;
862 set_new_dnode(&dn, inode, NULL, NULL, 0);
863 ret = get_dnode_of_data(&dn, src, LOOKUP_NODE_RA);
864 if (ret && ret != -ENOENT) {
866 } else if (ret == -ENOENT) {
867 new_addr = NULL_ADDR;
869 new_addr = dn.data_blkaddr;
870 if (!is_checkpointed_data(sbi, new_addr)) {
871 /* do not invalidate this block address */
872 f2fs_update_data_blkaddr(&dn, NULL_ADDR);
878 if (new_addr == NULL_ADDR)
879 return full ? truncate_hole(inode, dst, dst + 1) : 0;
885 if (test_opt(sbi, LFS)) {
890 ipage = get_node_page(sbi, inode->i_ino);
892 ret = PTR_ERR(ipage);
896 set_new_dnode(&dn, inode, ipage, NULL, 0);
897 ret = f2fs_reserve_block(&dn, dst);
901 truncate_data_blocks_range(&dn, 1);
903 get_node_info(sbi, dn.nid, &ni);
904 f2fs_replace_block(sbi, &dn, dn.data_blkaddr, new_addr,
905 ni.version, true, false);
908 struct page *psrc, *pdst;
910 psrc = get_lock_data_page(inode, src, true);
912 return PTR_ERR(psrc);
913 pdst = get_new_data_page(inode, NULL, dst, true);
915 f2fs_put_page(psrc, 1);
916 return PTR_ERR(pdst);
918 f2fs_copy_page(psrc, pdst);
919 set_page_dirty(pdst);
920 f2fs_put_page(pdst, 1);
921 f2fs_put_page(psrc, 1);
923 return truncate_hole(inode, src, src + 1);
928 if (!get_dnode_of_data(&dn, src, LOOKUP_NODE)) {
929 f2fs_update_data_blkaddr(&dn, new_addr);
935 static int f2fs_do_collapse(struct inode *inode, pgoff_t start, pgoff_t end)
937 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
938 pgoff_t nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE;
941 for (; end < nrpages; start++, end++) {
942 f2fs_balance_fs(sbi, true);
944 ret = __exchange_data_block(inode, end, start, true);
952 static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len)
954 pgoff_t pg_start, pg_end;
958 if (offset + len >= i_size_read(inode))
961 /* collapse range should be aligned to block size of f2fs. */
962 if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))
965 ret = f2fs_convert_inline_inode(inode);
969 pg_start = offset >> PAGE_SHIFT;
970 pg_end = (offset + len) >> PAGE_SHIFT;
972 /* write out all dirty pages from offset */
973 ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
977 truncate_pagecache(inode, offset);
979 ret = f2fs_do_collapse(inode, pg_start, pg_end);
983 /* write out all moved pages, if possible */
984 filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
985 truncate_pagecache(inode, offset);
987 new_size = i_size_read(inode) - len;
988 truncate_pagecache(inode, new_size);
990 ret = truncate_blocks(inode, new_size, true);
992 f2fs_i_size_write(inode, new_size);
997 static int f2fs_do_zero_range(struct dnode_of_data *dn, pgoff_t start,
1000 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
1001 pgoff_t index = start;
1002 unsigned int ofs_in_node = dn->ofs_in_node;
1006 for (; index < end; index++, dn->ofs_in_node++) {
1007 if (datablock_addr(dn->node_page, dn->ofs_in_node) == NULL_ADDR)
1011 dn->ofs_in_node = ofs_in_node;
1012 ret = reserve_new_blocks(dn, count);
1016 dn->ofs_in_node = ofs_in_node;
1017 for (index = start; index < end; index++, dn->ofs_in_node++) {
1019 datablock_addr(dn->node_page, dn->ofs_in_node);
1021 * reserve_new_blocks will not guarantee entire block
1024 if (dn->data_blkaddr == NULL_ADDR) {
1028 if (dn->data_blkaddr != NEW_ADDR) {
1029 invalidate_blocks(sbi, dn->data_blkaddr);
1030 dn->data_blkaddr = NEW_ADDR;
1031 set_data_blkaddr(dn);
1035 f2fs_update_extent_cache_range(dn, start, 0, index - start);
1040 static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len,
1043 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1044 struct address_space *mapping = inode->i_mapping;
1045 pgoff_t index, pg_start, pg_end;
1046 loff_t new_size = i_size_read(inode);
1047 loff_t off_start, off_end;
1050 ret = inode_newsize_ok(inode, (len + offset));
1054 ret = f2fs_convert_inline_inode(inode);
1058 ret = filemap_write_and_wait_range(mapping, offset, offset + len - 1);
1062 truncate_pagecache_range(inode, offset, offset + len - 1);
1064 pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
1065 pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
1067 off_start = offset & (PAGE_SIZE - 1);
1068 off_end = (offset + len) & (PAGE_SIZE - 1);
1070 if (pg_start == pg_end) {
1071 ret = fill_zero(inode, pg_start, off_start,
1072 off_end - off_start);
1076 if (offset + len > new_size)
1077 new_size = offset + len;
1078 new_size = max_t(loff_t, new_size, offset + len);
1081 ret = fill_zero(inode, pg_start++, off_start,
1082 PAGE_SIZE - off_start);
1086 new_size = max_t(loff_t, new_size,
1087 (loff_t)pg_start << PAGE_SHIFT);
1090 for (index = pg_start; index < pg_end;) {
1091 struct dnode_of_data dn;
1092 unsigned int end_offset;
1097 set_new_dnode(&dn, inode, NULL, NULL, 0);
1098 ret = get_dnode_of_data(&dn, index, ALLOC_NODE);
1100 f2fs_unlock_op(sbi);
1104 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
1105 end = min(pg_end, end_offset - dn.ofs_in_node + index);
1107 ret = f2fs_do_zero_range(&dn, index, end);
1108 f2fs_put_dnode(&dn);
1109 f2fs_unlock_op(sbi);
1114 new_size = max_t(loff_t, new_size,
1115 (loff_t)index << PAGE_SHIFT);
1119 ret = fill_zero(inode, pg_end, 0, off_end);
1123 new_size = max_t(loff_t, new_size, offset + len);
1128 if (!(mode & FALLOC_FL_KEEP_SIZE) && i_size_read(inode) < new_size)
1129 f2fs_i_size_write(inode, new_size);
1134 static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len)
1136 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1137 pgoff_t pg_start, pg_end, delta, nrpages, idx;
1141 new_size = i_size_read(inode) + len;
1142 if (new_size > inode->i_sb->s_maxbytes)
1145 if (offset >= i_size_read(inode))
1148 /* insert range should be aligned to block size of f2fs. */
1149 if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))
1152 ret = f2fs_convert_inline_inode(inode);
1156 f2fs_balance_fs(sbi, true);
1158 ret = truncate_blocks(inode, i_size_read(inode), true);
1162 /* write out all dirty pages from offset */
1163 ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1167 truncate_pagecache(inode, offset);
1169 pg_start = offset >> PAGE_SHIFT;
1170 pg_end = (offset + len) >> PAGE_SHIFT;
1171 delta = pg_end - pg_start;
1172 nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE;
1174 for (idx = nrpages - 1; idx >= pg_start && idx != -1; idx--) {
1176 ret = __exchange_data_block(inode, idx, idx + delta, false);
1177 f2fs_unlock_op(sbi);
1182 /* write out all moved pages, if possible */
1183 filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1184 truncate_pagecache(inode, offset);
1187 f2fs_i_size_write(inode, new_size);
1191 static int expand_inode_data(struct inode *inode, loff_t offset,
1192 loff_t len, int mode)
1194 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1195 struct f2fs_map_blocks map = { .m_next_pgofs = NULL };
1197 loff_t new_size = i_size_read(inode);
1201 ret = inode_newsize_ok(inode, (len + offset));
1205 ret = f2fs_convert_inline_inode(inode);
1209 f2fs_balance_fs(sbi, true);
1211 pg_end = ((unsigned long long)offset + len) >> PAGE_SHIFT;
1212 off_end = (offset + len) & (PAGE_SIZE - 1);
1214 map.m_lblk = ((unsigned long long)offset) >> PAGE_SHIFT;
1215 map.m_len = pg_end - map.m_lblk;
1219 ret = f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO);
1226 last_off = map.m_lblk + map.m_len - 1;
1228 /* update new size to the failed position */
1229 new_size = (last_off == pg_end) ? offset + len:
1230 (loff_t)(last_off + 1) << PAGE_SHIFT;
1232 new_size = ((loff_t)pg_end << PAGE_SHIFT) + off_end;
1235 if (!(mode & FALLOC_FL_KEEP_SIZE) && i_size_read(inode) < new_size)
1236 f2fs_i_size_write(inode, new_size);
1241 static long f2fs_fallocate(struct file *file, int mode,
1242 loff_t offset, loff_t len)
1244 struct inode *inode = file_inode(file);
1247 /* f2fs only support ->fallocate for regular file */
1248 if (!S_ISREG(inode->i_mode))
1251 if (f2fs_encrypted_inode(inode) &&
1252 (mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)))
1255 if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
1256 FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE |
1257 FALLOC_FL_INSERT_RANGE))
1262 if (mode & FALLOC_FL_PUNCH_HOLE) {
1263 if (offset >= inode->i_size)
1266 ret = punch_hole(inode, offset, len);
1267 } else if (mode & FALLOC_FL_COLLAPSE_RANGE) {
1268 ret = f2fs_collapse_range(inode, offset, len);
1269 } else if (mode & FALLOC_FL_ZERO_RANGE) {
1270 ret = f2fs_zero_range(inode, offset, len, mode);
1271 } else if (mode & FALLOC_FL_INSERT_RANGE) {
1272 ret = f2fs_insert_range(inode, offset, len);
1274 ret = expand_inode_data(inode, offset, len, mode);
1278 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
1279 f2fs_mark_inode_dirty_sync(inode);
1280 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1284 inode_unlock(inode);
1286 trace_f2fs_fallocate(inode, mode, offset, len, ret);
1290 static int f2fs_release_file(struct inode *inode, struct file *filp)
1293 * f2fs_relase_file is called at every close calls. So we should
1294 * not drop any inmemory pages by close called by other process.
1296 if (!(filp->f_mode & FMODE_WRITE) ||
1297 atomic_read(&inode->i_writecount) != 1)
1300 /* some remained atomic pages should discarded */
1301 if (f2fs_is_atomic_file(inode))
1302 drop_inmem_pages(inode);
1303 if (f2fs_is_volatile_file(inode)) {
1304 clear_inode_flag(inode, FI_VOLATILE_FILE);
1305 set_inode_flag(inode, FI_DROP_CACHE);
1306 filemap_fdatawrite(inode->i_mapping);
1307 clear_inode_flag(inode, FI_DROP_CACHE);
1312 #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL))
1313 #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL)
1315 static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags)
1319 else if (S_ISREG(mode))
1320 return flags & F2FS_REG_FLMASK;
1322 return flags & F2FS_OTHER_FLMASK;
1325 static int f2fs_ioc_getflags(struct file *filp, unsigned long arg)
1327 struct inode *inode = file_inode(filp);
1328 struct f2fs_inode_info *fi = F2FS_I(inode);
1329 unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE;
1330 return put_user(flags, (int __user *)arg);
1333 static int f2fs_ioc_setflags(struct file *filp, unsigned long arg)
1335 struct inode *inode = file_inode(filp);
1336 struct f2fs_inode_info *fi = F2FS_I(inode);
1337 unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE;
1338 unsigned int oldflags;
1341 if (!inode_owner_or_capable(inode))
1344 if (get_user(flags, (int __user *)arg))
1347 ret = mnt_want_write_file(filp);
1351 flags = f2fs_mask_flags(inode->i_mode, flags);
1355 oldflags = fi->i_flags;
1357 if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) {
1358 if (!capable(CAP_LINUX_IMMUTABLE)) {
1359 inode_unlock(inode);
1365 flags = flags & FS_FL_USER_MODIFIABLE;
1366 flags |= oldflags & ~FS_FL_USER_MODIFIABLE;
1367 fi->i_flags = flags;
1368 inode_unlock(inode);
1370 inode->i_ctime = CURRENT_TIME;
1371 f2fs_set_inode_flags(inode);
1373 mnt_drop_write_file(filp);
1377 static int f2fs_ioc_getversion(struct file *filp, unsigned long arg)
1379 struct inode *inode = file_inode(filp);
1381 return put_user(inode->i_generation, (int __user *)arg);
1384 static int f2fs_ioc_start_atomic_write(struct file *filp)
1386 struct inode *inode = file_inode(filp);
1389 if (!inode_owner_or_capable(inode))
1392 ret = mnt_want_write_file(filp);
1398 if (f2fs_is_atomic_file(inode))
1401 ret = f2fs_convert_inline_inode(inode);
1405 set_inode_flag(inode, FI_ATOMIC_FILE);
1406 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1408 if (!get_dirty_pages(inode))
1411 f2fs_msg(F2FS_I_SB(inode)->sb, KERN_WARNING,
1412 "Unexpected flush for atomic writes: ino=%lu, npages=%lld",
1413 inode->i_ino, get_dirty_pages(inode));
1414 ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
1416 clear_inode_flag(inode, FI_ATOMIC_FILE);
1418 inode_unlock(inode);
1419 mnt_drop_write_file(filp);
1423 static int f2fs_ioc_commit_atomic_write(struct file *filp)
1425 struct inode *inode = file_inode(filp);
1428 if (!inode_owner_or_capable(inode))
1431 ret = mnt_want_write_file(filp);
1437 if (f2fs_is_volatile_file(inode))
1440 if (f2fs_is_atomic_file(inode)) {
1441 clear_inode_flag(inode, FI_ATOMIC_FILE);
1442 ret = commit_inmem_pages(inode);
1444 set_inode_flag(inode, FI_ATOMIC_FILE);
1449 ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
1451 inode_unlock(inode);
1452 mnt_drop_write_file(filp);
1456 static int f2fs_ioc_start_volatile_write(struct file *filp)
1458 struct inode *inode = file_inode(filp);
1461 if (!inode_owner_or_capable(inode))
1464 ret = mnt_want_write_file(filp);
1470 if (f2fs_is_volatile_file(inode))
1473 ret = f2fs_convert_inline_inode(inode);
1477 set_inode_flag(inode, FI_VOLATILE_FILE);
1478 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1480 inode_unlock(inode);
1481 mnt_drop_write_file(filp);
1485 static int f2fs_ioc_release_volatile_write(struct file *filp)
1487 struct inode *inode = file_inode(filp);
1490 if (!inode_owner_or_capable(inode))
1493 ret = mnt_want_write_file(filp);
1499 if (!f2fs_is_volatile_file(inode))
1502 if (!f2fs_is_first_block_written(inode)) {
1503 ret = truncate_partial_data_page(inode, 0, true);
1507 ret = punch_hole(inode, 0, F2FS_BLKSIZE);
1509 inode_unlock(inode);
1510 mnt_drop_write_file(filp);
1514 static int f2fs_ioc_abort_volatile_write(struct file *filp)
1516 struct inode *inode = file_inode(filp);
1519 if (!inode_owner_or_capable(inode))
1522 ret = mnt_want_write_file(filp);
1528 if (f2fs_is_atomic_file(inode))
1529 drop_inmem_pages(inode);
1530 if (f2fs_is_volatile_file(inode)) {
1531 clear_inode_flag(inode, FI_VOLATILE_FILE);
1532 ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
1535 inode_unlock(inode);
1537 mnt_drop_write_file(filp);
1538 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1542 static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
1544 struct inode *inode = file_inode(filp);
1545 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1546 struct super_block *sb = sbi->sb;
1550 if (!capable(CAP_SYS_ADMIN))
1553 if (get_user(in, (__u32 __user *)arg))
1556 ret = mnt_want_write_file(filp);
1561 case F2FS_GOING_DOWN_FULLSYNC:
1562 sb = freeze_bdev(sb->s_bdev);
1563 if (sb && !IS_ERR(sb)) {
1564 f2fs_stop_checkpoint(sbi, false);
1565 thaw_bdev(sb->s_bdev, sb);
1568 case F2FS_GOING_DOWN_METASYNC:
1569 /* do checkpoint only */
1570 f2fs_sync_fs(sb, 1);
1571 f2fs_stop_checkpoint(sbi, false);
1573 case F2FS_GOING_DOWN_NOSYNC:
1574 f2fs_stop_checkpoint(sbi, false);
1576 case F2FS_GOING_DOWN_METAFLUSH:
1577 sync_meta_pages(sbi, META, LONG_MAX);
1578 f2fs_stop_checkpoint(sbi, false);
1584 f2fs_update_time(sbi, REQ_TIME);
1586 mnt_drop_write_file(filp);
1590 static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg)
1592 struct inode *inode = file_inode(filp);
1593 struct super_block *sb = inode->i_sb;
1594 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1595 struct fstrim_range range;
1598 if (!capable(CAP_SYS_ADMIN))
1601 if (!blk_queue_discard(q))
1604 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
1608 ret = mnt_want_write_file(filp);
1612 range.minlen = max((unsigned int)range.minlen,
1613 q->limits.discard_granularity);
1614 ret = f2fs_trim_fs(F2FS_SB(sb), &range);
1615 mnt_drop_write_file(filp);
1619 if (copy_to_user((struct fstrim_range __user *)arg, &range,
1622 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1626 static bool uuid_is_nonzero(__u8 u[16])
1630 for (i = 0; i < 16; i++)
1636 static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg)
1638 struct fscrypt_policy policy;
1639 struct inode *inode = file_inode(filp);
1642 if (copy_from_user(&policy, (struct fscrypt_policy __user *)arg,
1646 ret = mnt_want_write_file(filp);
1650 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1651 ret = fscrypt_process_policy(inode, &policy);
1653 mnt_drop_write_file(filp);
1657 static int f2fs_ioc_get_encryption_policy(struct file *filp, unsigned long arg)
1659 struct fscrypt_policy policy;
1660 struct inode *inode = file_inode(filp);
1663 err = fscrypt_get_policy(inode, &policy);
1667 if (copy_to_user((struct fscrypt_policy __user *)arg, &policy, sizeof(policy)))
1672 static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg)
1674 struct inode *inode = file_inode(filp);
1675 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1678 if (!f2fs_sb_has_crypto(inode->i_sb))
1681 if (uuid_is_nonzero(sbi->raw_super->encrypt_pw_salt))
1684 err = mnt_want_write_file(filp);
1688 /* update superblock with uuid */
1689 generate_random_uuid(sbi->raw_super->encrypt_pw_salt);
1691 err = f2fs_commit_super(sbi, false);
1694 memset(sbi->raw_super->encrypt_pw_salt, 0, 16);
1695 mnt_drop_write_file(filp);
1698 mnt_drop_write_file(filp);
1700 if (copy_to_user((__u8 __user *)arg, sbi->raw_super->encrypt_pw_salt,
1706 static int f2fs_ioc_gc(struct file *filp, unsigned long arg)
1708 struct inode *inode = file_inode(filp);
1709 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1713 if (!capable(CAP_SYS_ADMIN))
1716 if (get_user(sync, (__u32 __user *)arg))
1719 if (f2fs_readonly(sbi->sb))
1722 ret = mnt_want_write_file(filp);
1727 if (!mutex_trylock(&sbi->gc_mutex)) {
1732 mutex_lock(&sbi->gc_mutex);
1735 ret = f2fs_gc(sbi, sync);
1737 mnt_drop_write_file(filp);
1741 static int f2fs_ioc_write_checkpoint(struct file *filp, unsigned long arg)
1743 struct inode *inode = file_inode(filp);
1744 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1747 if (!capable(CAP_SYS_ADMIN))
1750 if (f2fs_readonly(sbi->sb))
1753 ret = mnt_want_write_file(filp);
1757 ret = f2fs_sync_fs(sbi->sb, 1);
1759 mnt_drop_write_file(filp);
1763 static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
1765 struct f2fs_defragment *range)
1767 struct inode *inode = file_inode(filp);
1768 struct f2fs_map_blocks map = { .m_next_pgofs = NULL };
1769 struct extent_info ei;
1770 pgoff_t pg_start, pg_end;
1771 unsigned int blk_per_seg = sbi->blocks_per_seg;
1772 unsigned int total = 0, sec_num;
1773 unsigned int pages_per_sec = sbi->segs_per_sec * blk_per_seg;
1774 block_t blk_end = 0;
1775 bool fragmented = false;
1778 /* if in-place-update policy is enabled, don't waste time here */
1779 if (need_inplace_update(inode))
1782 pg_start = range->start >> PAGE_SHIFT;
1783 pg_end = (range->start + range->len) >> PAGE_SHIFT;
1785 f2fs_balance_fs(sbi, true);
1789 /* writeback all dirty pages in the range */
1790 err = filemap_write_and_wait_range(inode->i_mapping, range->start,
1791 range->start + range->len - 1);
1796 * lookup mapping info in extent cache, skip defragmenting if physical
1797 * block addresses are continuous.
1799 if (f2fs_lookup_extent_cache(inode, pg_start, &ei)) {
1800 if (ei.fofs + ei.len >= pg_end)
1804 map.m_lblk = pg_start;
1807 * lookup mapping info in dnode page cache, skip defragmenting if all
1808 * physical block addresses are continuous even if there are hole(s)
1809 * in logical blocks.
1811 while (map.m_lblk < pg_end) {
1812 map.m_len = pg_end - map.m_lblk;
1813 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_READ);
1817 if (!(map.m_flags & F2FS_MAP_FLAGS)) {
1822 if (blk_end && blk_end != map.m_pblk) {
1826 blk_end = map.m_pblk + map.m_len;
1828 map.m_lblk += map.m_len;
1834 map.m_lblk = pg_start;
1835 map.m_len = pg_end - pg_start;
1837 sec_num = (map.m_len + pages_per_sec - 1) / pages_per_sec;
1840 * make sure there are enough free section for LFS allocation, this can
1841 * avoid defragment running in SSR mode when free section are allocated
1844 if (has_not_enough_free_secs(sbi, sec_num)) {
1849 while (map.m_lblk < pg_end) {
1854 map.m_len = pg_end - map.m_lblk;
1855 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_READ);
1859 if (!(map.m_flags & F2FS_MAP_FLAGS)) {
1864 set_inode_flag(inode, FI_DO_DEFRAG);
1867 while (idx < map.m_lblk + map.m_len && cnt < blk_per_seg) {
1870 page = get_lock_data_page(inode, idx, true);
1872 err = PTR_ERR(page);
1876 set_page_dirty(page);
1877 f2fs_put_page(page, 1);
1886 if (idx < pg_end && cnt < blk_per_seg)
1889 clear_inode_flag(inode, FI_DO_DEFRAG);
1891 err = filemap_fdatawrite(inode->i_mapping);
1896 clear_inode_flag(inode, FI_DO_DEFRAG);
1898 inode_unlock(inode);
1900 range->len = (u64)total << PAGE_SHIFT;
1904 static int f2fs_ioc_defragment(struct file *filp, unsigned long arg)
1906 struct inode *inode = file_inode(filp);
1907 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1908 struct f2fs_defragment range;
1911 if (!capable(CAP_SYS_ADMIN))
1914 if (!S_ISREG(inode->i_mode))
1917 err = mnt_want_write_file(filp);
1921 if (f2fs_readonly(sbi->sb)) {
1926 if (copy_from_user(&range, (struct f2fs_defragment __user *)arg,
1932 /* verify alignment of offset & size */
1933 if (range.start & (F2FS_BLKSIZE - 1) ||
1934 range.len & (F2FS_BLKSIZE - 1)) {
1939 err = f2fs_defragment_range(sbi, filp, &range);
1940 f2fs_update_time(sbi, REQ_TIME);
1944 if (copy_to_user((struct f2fs_defragment __user *)arg, &range,
1948 mnt_drop_write_file(filp);
1952 long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1955 case F2FS_IOC_GETFLAGS:
1956 return f2fs_ioc_getflags(filp, arg);
1957 case F2FS_IOC_SETFLAGS:
1958 return f2fs_ioc_setflags(filp, arg);
1959 case F2FS_IOC_GETVERSION:
1960 return f2fs_ioc_getversion(filp, arg);
1961 case F2FS_IOC_START_ATOMIC_WRITE:
1962 return f2fs_ioc_start_atomic_write(filp);
1963 case F2FS_IOC_COMMIT_ATOMIC_WRITE:
1964 return f2fs_ioc_commit_atomic_write(filp);
1965 case F2FS_IOC_START_VOLATILE_WRITE:
1966 return f2fs_ioc_start_volatile_write(filp);
1967 case F2FS_IOC_RELEASE_VOLATILE_WRITE:
1968 return f2fs_ioc_release_volatile_write(filp);
1969 case F2FS_IOC_ABORT_VOLATILE_WRITE:
1970 return f2fs_ioc_abort_volatile_write(filp);
1971 case F2FS_IOC_SHUTDOWN:
1972 return f2fs_ioc_shutdown(filp, arg);
1974 return f2fs_ioc_fitrim(filp, arg);
1975 case F2FS_IOC_SET_ENCRYPTION_POLICY:
1976 return f2fs_ioc_set_encryption_policy(filp, arg);
1977 case F2FS_IOC_GET_ENCRYPTION_POLICY:
1978 return f2fs_ioc_get_encryption_policy(filp, arg);
1979 case F2FS_IOC_GET_ENCRYPTION_PWSALT:
1980 return f2fs_ioc_get_encryption_pwsalt(filp, arg);
1981 case F2FS_IOC_GARBAGE_COLLECT:
1982 return f2fs_ioc_gc(filp, arg);
1983 case F2FS_IOC_WRITE_CHECKPOINT:
1984 return f2fs_ioc_write_checkpoint(filp, arg);
1985 case F2FS_IOC_DEFRAGMENT:
1986 return f2fs_ioc_defragment(filp, arg);
1992 static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
1994 struct file *file = iocb->ki_filp;
1995 struct inode *inode = file_inode(file);
1998 if (f2fs_encrypted_inode(inode) &&
1999 !fscrypt_has_encryption_key(inode) &&
2000 fscrypt_get_encryption_info(inode))
2004 ret = generic_write_checks(iocb, from);
2006 ret = f2fs_preallocate_blocks(iocb, from);
2008 ret = __generic_file_write_iter(iocb, from);
2010 inode_unlock(inode);
2013 ret = generic_write_sync(iocb, ret);
2017 #ifdef CONFIG_COMPAT
2018 long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2021 case F2FS_IOC32_GETFLAGS:
2022 cmd = F2FS_IOC_GETFLAGS;
2024 case F2FS_IOC32_SETFLAGS:
2025 cmd = F2FS_IOC_SETFLAGS;
2027 case F2FS_IOC32_GETVERSION:
2028 cmd = F2FS_IOC_GETVERSION;
2030 case F2FS_IOC_START_ATOMIC_WRITE:
2031 case F2FS_IOC_COMMIT_ATOMIC_WRITE:
2032 case F2FS_IOC_START_VOLATILE_WRITE:
2033 case F2FS_IOC_RELEASE_VOLATILE_WRITE:
2034 case F2FS_IOC_ABORT_VOLATILE_WRITE:
2035 case F2FS_IOC_SHUTDOWN:
2036 case F2FS_IOC_SET_ENCRYPTION_POLICY:
2037 case F2FS_IOC_GET_ENCRYPTION_PWSALT:
2038 case F2FS_IOC_GET_ENCRYPTION_POLICY:
2039 case F2FS_IOC_GARBAGE_COLLECT:
2040 case F2FS_IOC_WRITE_CHECKPOINT:
2041 case F2FS_IOC_DEFRAGMENT:
2044 return -ENOIOCTLCMD;
2046 return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
2050 const struct file_operations f2fs_file_operations = {
2051 .llseek = f2fs_llseek,
2052 .read_iter = generic_file_read_iter,
2053 .write_iter = f2fs_file_write_iter,
2054 .open = f2fs_file_open,
2055 .release = f2fs_release_file,
2056 .mmap = f2fs_file_mmap,
2057 .fsync = f2fs_sync_file,
2058 .fallocate = f2fs_fallocate,
2059 .unlocked_ioctl = f2fs_ioctl,
2060 #ifdef CONFIG_COMPAT
2061 .compat_ioctl = f2fs_compat_ioctl,
2063 .splice_read = generic_file_splice_read,
2064 .splice_write = iter_file_splice_write,