diff options
| author |   Amir Goldstein <amir73il@gmail.com> | 2017-01-31 10:34:57 +0200 |
|---|---|---|
| committer |   Miklos Szeredi <mszeredi@redhat.com> | 2017-02-07 15:05:04 +0100 |
| commit | bfe219d373cadab761373aeea4c70406bc27ea2c (patch) | |
| tree | 781b1664565d45394b4272cc783932b857de67cf /include/linux/fs.h | |
| parent | vfs: deny copy_file_range() for non regular files (diff) | |
| download | linux-dev-bfe219d373cadab761373aeea4c70406bc27ea2c.tar.xz linux-dev-bfe219d373cadab761373aeea4c70406bc27ea2c.zip | |
vfs: wrap write f_ops with file_{start,end}_write()
Before calling write f_ops, call file_start_write() instead
of sb_start_write().
Replace {sb,file}_start_write() for {copy,clone}_file_range() and
for fallocate().
Beyond correct semantics, this avoids freeze protection to sb when
operating on special inodes, such as fallocate() on a blockdev.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'include/linux/fs.h')
| -rw-r--r-- | include/linux/fs.h | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 4a7f3cc9edab..78c81e6f5d76 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1741,19 +1741,6 @@ extern int vfs_dedupe_file_range_compare(struct inode *src, loff_t srcoff, extern int vfs_dedupe_file_range(struct file *file, struct file_dedupe_range *same); -static inline int do_clone_file_range(struct file *file_in, loff_t pos_in, - struct file *file_out, loff_t pos_out, - u64 len) -{ - int ret; - - sb_start_write(file_inode(file_out)->i_sb); - ret = vfs_clone_file_range(file_in, pos_in, file_out, pos_out, len); - sb_end_write(file_inode(file_out)->i_sb); - - return ret; -} - struct super_operations { struct inode *(*alloc_inode)(struct super_block *sb); void (*destroy_inode)(struct inode *); @@ -2564,6 +2551,19 @@ static inline void file_end_write(struct file *file) __sb_end_write(file_inode(file)->i_sb, SB_FREEZE_WRITE); } +static inline int do_clone_file_range(struct file *file_in, loff_t pos_in, + struct file *file_out, loff_t pos_out, + u64 len) +{ + int ret; + + file_start_write(file_out); + ret = vfs_clone_file_range(file_in, pos_in, file_out, pos_out, len); + file_end_write(file_out); + + return ret; +} + /* * get_write_access() gets write permission for a file. * put_write_access() releases this write permission. |