diff options
Diffstat (limited to 'fs/overlayfs/overlayfs.h')
| -rw-r--r-- | fs/overlayfs/overlayfs.h | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h index 2cbebe06d9ad..2433cc030c87 100644 --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -34,6 +34,7 @@ enum ovl_xattr { OVL_XATTR_NLINK, OVL_XATTR_UPPER, OVL_XATTR_METACOPY, + OVL_XATTR_PROTATTR, }; enum ovl_inode_flag { @@ -520,14 +521,22 @@ static inline void ovl_copyattr(struct inode *from, struct inode *to) /* vfs inode flags copied from real to ovl inode */ #define OVL_COPY_I_FLAGS_MASK (S_SYNC | S_NOATIME | S_APPEND | S_IMMUTABLE) +/* vfs inode flags read from overlay.protattr xattr to ovl inode */ +#define OVL_PROT_I_FLAGS_MASK (S_APPEND | S_IMMUTABLE) /* * fileattr flags copied from lower to upper inode on copy up. - * We cannot copy immutable/append-only flags, because that would prevevnt - * linking temp inode to upper dir. + * We cannot copy up immutable/append-only flags, because that would prevent + * linking temp inode to upper dir, so we store them in xattr instead. */ #define OVL_COPY_FS_FLAGS_MASK (FS_SYNC_FL | FS_NOATIME_FL) #define OVL_COPY_FSX_FLAGS_MASK (FS_XFLAG_SYNC | FS_XFLAG_NOATIME) +#define OVL_PROT_FS_FLAGS_MASK (FS_APPEND_FL | FS_IMMUTABLE_FL) +#define OVL_PROT_FSX_FLAGS_MASK (FS_XFLAG_APPEND | FS_XFLAG_IMMUTABLE) + +void ovl_check_protattr(struct inode *inode, struct dentry *upper); +int ovl_set_protattr(struct inode *inode, struct dentry *upper, + struct fileattr *fa); static inline void ovl_copyflags(struct inode *from, struct inode *to) { |