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| author | Amir Goldstein <amir73il@gmail.com> | 2017-06-25 16:37:17 +0300 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2017-11-09 10:23:26 +0100 |
| commit | b79e05aaa166755fafbf02db275175edb5175df8 (patch) | |
| tree | aaa5fcc30c2ffe7c22df0074900846917332c08b /fs/overlayfs/overlayfs.h | |
| parent | 4eae06de482bf370144704e31f65cd6dfbcebe94 (diff) | |
| download | op-kernel-dev-b79e05aaa166755fafbf02db275175edb5175df8.zip op-kernel-dev-b79e05aaa166755fafbf02db275175edb5175df8.tar.gz | |
ovl: no direct iteration for dir with origin xattr
If a non-merge dir in an overlay mount has an overlay.origin xattr, it
means it was once an upper merge dir, which may contain whiteouts and
then the lower dir was removed under it.
Do not iterate real dir directly in this case to avoid exposing whiteouts.
[SzM] Set OVL_WHITEOUT for all merge directories as well.
[amir] A directory that was just copied up does not have the OVL_WHITEOUTS
flag. We need to set it to fix merge dir iteration.
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 | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h index d9a0edd..d53157c 100644 --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -28,7 +28,10 @@ enum ovl_path_type { #define OVL_XATTR_NLINK OVL_XATTR_PREFIX "nlink" enum ovl_flag { + /* Pure upper dir that may contain non pure upper entries */ OVL_IMPURE, + /* Non-merge dir that may contain whiteout entries */ + OVL_WHITEOUTS, OVL_INDEX, }; @@ -223,6 +226,7 @@ bool ovl_is_whiteout(struct dentry *dentry); struct file *ovl_path_open(struct path *path, int flags); int ovl_copy_up_start(struct dentry *dentry); void ovl_copy_up_end(struct dentry *dentry); +bool ovl_check_origin_xattr(struct dentry *dentry); bool ovl_check_dir_xattr(struct dentry *dentry, const char *name); int ovl_check_setxattr(struct dentry *dentry, struct dentry *upperdentry, const char *name, const void *value, size_t size, |
