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| author |   Amir Goldstein <amir73il@gmail.com> | 2017-06-21 15:28:37 +0300 |
|---|---|---|
| committer |   Miklos Szeredi <mszeredi@redhat.com> | 2017-07-04 22:03:17 +0200 |
| commit | 8b88a2e6403638b56556ed5b1c60d9318eefea9c (patch) | |
| tree | c15c850ac2640fb933e393bfb38fdc30d2f73bd2 /fs/overlayfs/overlayfs.h | |
| parent | ovl: introduce the inodes index dir feature (diff) | |
| download | linux-dev-8b88a2e6403638b56556ed5b1c60d9318eefea9c.tar.xz linux-dev-8b88a2e6403638b56556ed5b1c60d9318eefea9c.zip | |
ovl: verify upper root dir matches lower root dir
When inodes index feature is enabled, verify that the file handle stored
in upper root dir matches the lower root dir or fail to mount.
If upper root dir has no stored file handle, encode and store the lower
root dir file handle in overlay.origin xattr.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/overlayfs/overlayfs.h')
| -rw-r--r-- | fs/overlayfs/overlayfs.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h index 4e7a74e99d3c..38ac84cba6ea 100644 --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -232,6 +232,8 @@ static inline bool ovl_is_impuredir(struct dentry *dentry) /* namei.c */ +int ovl_verify_origin(struct dentry *dentry, struct vfsmount *mnt, + struct dentry *origin, bool set); int ovl_path_next(int idx, struct dentry *dentry, struct path *path); struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags); bool ovl_lower_positive(struct dentry *dentry); @@ -290,3 +292,4 @@ int ovl_copy_up(struct dentry *dentry); int ovl_copy_up_flags(struct dentry *dentry, int flags); int ovl_copy_xattr(struct dentry *old, struct dentry *new); int ovl_set_attr(struct dentry *upper, struct kstat *stat); +struct ovl_fh *ovl_encode_fh(struct dentry *lower); |