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authorAmir Goldstein <amir73il@gmail.com>2019-05-26 09:28:25 +0300
committerMiklos Szeredi <mszeredi@redhat.com>2019-05-27 10:03:10 +0200
commitb21d9c435f935014d3e3fa6914f2e4fbabb0e94d (patch)
treef3dfbc793067d5730e231bb525913db4dde58367 /fs/overlayfs
parentcd6c84d8f0cdc911df435bb075ba22ce3c605b07 (diff)
downloadlinux-b21d9c435f935014d3e3fa6914f2e4fbabb0e94d.tar.bz2
ovl: support the FS_IOC_FS[SG]ETXATTR ioctls
They are the extended version of FS_IOC_FS[SG]ETFLAGS ioctls. xfs_io -c "chattr <flags>" uses the new ioctls for setting flags. This used to work in kernel pre v4.19, before stacked file ops introduced the ovl_ioctl whitelist. Reported-by: Dave Chinner <david@fromorbit.com> Fixes: d1d04ef8572b ("ovl: stack file ops") Cc: <stable@vger.kernel.org> # v4.19 Signed-off-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.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c
index 540a8b845145..340a6ad45914 100644
--- a/fs/overlayfs/file.c
+++ b/fs/overlayfs/file.c
@@ -426,7 +426,8 @@ static unsigned int ovl_get_inode_flags(struct inode *inode)
return ovl_iflags;
}
-static long ovl_ioctl_set_flags(struct file *file, unsigned long arg)
+static long ovl_ioctl_set_flags(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
long ret;
struct inode *inode = file_inode(file);
@@ -456,7 +457,7 @@ static long ovl_ioctl_set_flags(struct file *file, unsigned long arg)
if (ret)
goto unlock;
- ret = ovl_real_ioctl(file, FS_IOC_SETFLAGS, arg);
+ ret = ovl_real_ioctl(file, cmd, arg);
ovl_copyflags(ovl_inode_real(inode), inode);
unlock:
@@ -474,11 +475,13 @@ static long ovl_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
switch (cmd) {
case FS_IOC_GETFLAGS:
+ case FS_IOC_FSGETXATTR:
ret = ovl_real_ioctl(file, cmd, arg);
break;
case FS_IOC_SETFLAGS:
- ret = ovl_ioctl_set_flags(file, arg);
+ case FS_IOC_FSSETXATTR:
+ ret = ovl_ioctl_set_flags(file, cmd, arg);
break;
default: