ovl: fix POSIX ACL setting

[cascardo/linux.git] / fs / overlayfs / overlayfs.h

diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
index 99ec4b0..e4f5c95 100644 (file)
--- a/fs/overlayfs/overlayfs.h
+++ b/fs/overlayfs/overlayfs.h
@@ -23,9 +23,11 @@ enum ovl_path_type {
 #define OVL_TYPE_MERGE_OR_LOWER(type) \
        (OVL_TYPE_MERGE(type) || !OVL_TYPE_UPPER(type))
 
-#define OVL_XATTR_PRE_NAME "trusted.overlay."
-#define OVL_XATTR_PRE_LEN  16
-#define OVL_XATTR_OPAQUE   OVL_XATTR_PRE_NAME"opaque"
+
+#define OVL_XATTR_PREFIX XATTR_TRUSTED_PREFIX "overlay"
+#define OVL_XATTR_OPAQUE OVL_XATTR_PREFIX ".opaque"
+
+#define OVL_ISUPPER_MASK 1UL
 
 static inline int ovl_do_rmdir(struct inode *dir, struct dentry *dentry)
 {
@@ -131,6 +133,16 @@ static inline int ovl_do_whiteout(struct inode *dir, struct dentry *dentry)
        return err;
 }
 
+static inline struct inode *ovl_inode_real(struct inode *inode, bool *is_upper)
+{
+       unsigned long x = (unsigned long) READ_ONCE(inode->i_private);
+
+       if (is_upper)
+               *is_upper = x & OVL_ISUPPER_MASK;
+
+       return (struct inode *) (x & ~OVL_ISUPPER_MASK);
+}
+
 enum ovl_path_type ovl_path_type(struct dentry *dentry);
 u64 ovl_dentry_version_get(struct dentry *dentry);
 void ovl_dentry_version_inc(struct dentry *dentry);
@@ -141,11 +153,9 @@ int ovl_path_next(int idx, struct dentry *dentry, struct path *path);
 struct dentry *ovl_dentry_upper(struct dentry *dentry);
 struct dentry *ovl_dentry_lower(struct dentry *dentry);
 struct dentry *ovl_dentry_real(struct dentry *dentry);
-struct dentry *ovl_entry_real(struct ovl_entry *oe, bool *is_upper);
 struct vfsmount *ovl_entry_mnt_real(struct ovl_entry *oe, struct inode *inode,
                                    bool is_upper);
 struct ovl_dir_cache *ovl_dir_cache(struct dentry *dentry);
-bool ovl_is_default_permissions(struct inode *inode);
 void ovl_set_dir_cache(struct dentry *dentry, struct ovl_dir_cache *cache);
 struct dentry *ovl_workdir(struct dentry *dentry);
 int ovl_want_write(struct dentry *dentry);
@@ -153,7 +163,9 @@ void ovl_drop_write(struct dentry *dentry);
 bool ovl_dentry_is_opaque(struct dentry *dentry);
 void ovl_dentry_set_opaque(struct dentry *dentry, bool opaque);
 bool ovl_is_whiteout(struct dentry *dentry);
+const struct cred *ovl_override_creds(struct super_block *sb);
 void ovl_dentry_update(struct dentry *dentry, struct dentry *upperdentry);
+void ovl_inode_update(struct inode *inode, struct inode *upperinode);
 struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,
                          unsigned int flags);
 struct file *ovl_path_open(struct path *path, int flags);
@@ -171,20 +183,27 @@ int ovl_check_d_type_supported(struct path *realpath);
 /* inode.c */
 int ovl_setattr(struct dentry *dentry, struct iattr *attr);
 int ovl_permission(struct inode *inode, int mask);
-int ovl_setxattr(struct dentry *dentry, const char *name,
-                const void *value, size_t size, int flags);
+int ovl_setxattr(struct dentry *dentry, struct inode *inode,
+                const char *name, const void *value,
+                size_t size, int flags);
 ssize_t ovl_getxattr(struct dentry *dentry, struct inode *inode,
                     const char *name, void *value, size_t size);
 ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size);
 int ovl_removexattr(struct dentry *dentry, const char *name);
-struct inode *ovl_d_select_inode(struct dentry *dentry, unsigned file_flags);
+struct posix_acl *ovl_get_acl(struct inode *inode, int type);
+int ovl_open_maybe_copy_up(struct dentry *dentry, unsigned int file_flags);
+int ovl_update_time(struct inode *inode, struct timespec *ts, int flags);
 
-struct inode *ovl_new_inode(struct super_block *sb, umode_t mode,
-                           struct ovl_entry *oe);
+struct inode *ovl_new_inode(struct super_block *sb, umode_t mode);
+struct inode *ovl_get_inode(struct super_block *sb, struct inode *realinode);
 static inline void ovl_copyattr(struct inode *from, struct inode *to)
 {
        to->i_uid = from->i_uid;
        to->i_gid = from->i_gid;
+       to->i_mode = from->i_mode;
+       to->i_atime = from->i_atime;
+       to->i_mtime = from->i_mtime;
+       to->i_ctime = from->i_ctime;
 }
 
 /* dir.c */