int btrfs_removexattr(struct dentry *dentry, const char *name) { struct btrfs_root *root = BTRFS_I(dentry->d_inode)->root; /* * The permission on security.* and system.* is not checked * in permission(). */ if (btrfs_root_readonly(root)) return -EROFS; /* * If this is a request for a synthetic attribute in the system.* * namespace use the generic infrastructure to resolve a handler * for it via sb->s_xattr. */ if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN)) return generic_removexattr(dentry, name); if (!btrfs_is_valid_xattr(name)) return -EOPNOTSUPP; if (!strncmp(name, XATTR_BTRFS_PREFIX, XATTR_BTRFS_PREFIX_LEN)) return btrfs_set_prop(dentry->d_inode, name, NULL, 0, XATTR_REPLACE); return __btrfs_setxattr(NULL, dentry->d_inode, name, NULL, 0, XATTR_REPLACE); }
static int btrfs_xattr_handler_set_prop(const struct xattr_handler *handler, struct dentry *dentry, const char *name, const void *value, size_t size, int flags) { name = xattr_full_name(handler, name); return btrfs_set_prop(d_inode(dentry), name, value, size, flags); }