mnt_want_write() and mnt_want_write_file() will check sb->s_flags with
MS_RDONLY, and we don't need to do it ourselves.
Signed-off-by: Liu Bo <liubo2...@cn.fujitsu.com>
---
fs/btrfs/ioctl.c | 7 -------
1 files changed, 0 insertions(+), 7 deletions(-)
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index b5e946e..069cd85 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1379,14 +1379,10 @@ static noinline int
btrfs_ioctl_snap_create_transid(struct file *file,
u64 *transid,
bool readonly)
{
- struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
struct file *src_file;
int namelen;
int ret = 0;
- if (root->fs_info->sb->s_flags & MS_RDONLY)
- return -EROFS;
-
ret = mnt_want_write_file(file);
if (ret)
goto out;
@@ -3265,9 +3261,6 @@ static long btrfs_ioctl_balance(struct file *file, void
__user *arg)
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- if (fs_info->sb->s_flags & MS_RDONLY)
- return -EROFS;
-
ret = mnt_want_write(file->f_path.mnt);
if (ret)
return ret;
--
1.6.5.2
--
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