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| author | Vivek Goyal <vgoyal@redhat.com> | 2018-05-11 11:49:33 -0400 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2018-07-20 09:56:17 +0200 |
| commit | 935a074f48675374a655456ae75fe6be9e8c2388 (patch) | |
| tree | e12f2216c7a5e8f27835bcbaa8e3f4ed4e231c14 /fs/overlayfs | |
| parent | 997336f2c3053b74ec8c9d2d368ddd960f2fc8b6 (diff) | |
| download | blackbird-op-linux-935a074f48675374a655456ae75fe6be9e8c2388.tar.gz blackbird-op-linux-935a074f48675374a655456ae75fe6be9e8c2388.zip | |
ovl: Do not do metacopy only for ioctl modifying file attr
ovl_copy_up() by default will only do metadata only copy up (if enabled).
That means when ovl_real_ioctl() calls ovl_real_file(), it will still get
the lower file (as ovl_real_file() opens data file and not metacopy). And
that means "chattr +i" will end up modifying lower inode.
There seem to be two ways to solve this.
A. Open metacopy file in ovl_real_ioctl() and do operations on that
B. Force full copy up when FS_IOC_SETFLAGS is called.
I am resorting to option B for now as it feels little safer option. If
there are performance issues due to this, we can revisit it.
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/overlayfs')
| -rw-r--r-- | fs/overlayfs/file.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c index 5ab281aa64b5..32e9282893c9 100644 --- a/fs/overlayfs/file.c +++ b/fs/overlayfs/file.c @@ -372,7 +372,7 @@ static long ovl_ioctl(struct file *file, unsigned int cmd, unsigned long arg) if (ret) return ret; - ret = ovl_copy_up(file_dentry(file)); + ret = ovl_copy_up_with_data(file_dentry(file)); if (!ret) { ret = ovl_real_ioctl(file, cmd, arg); |
