/* fuse-overlayfs: Overlay Filesystem in Userspace Copyright (C) 2019 Red Hat Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . */ #ifndef UTILS_H #define UTILS_H #ifndef _GNU_SOURCE # define _GNU_SOURCE #endif #include #include #include #include #include #include #include #include #include "fuse-overlayfs.h" #define XATTR_OVERRIDE_STAT "user.fuseoverlayfs.override_stat" #define XATTR_PRIVILEGED_OVERRIDE_STAT "security.fuseoverlayfs.override_stat" #define XATTR_OVERRIDE_CONTAINERS_STAT "user.containers.override_stat" void cleanup_freep (void *p); void cleanup_filep (FILE **f); void cleanup_closep (void *p); void cleanup_dirp (DIR **p); int file_exists_at (int dirfd, const char *pathname); int strconcat3 (char *dest, size_t size, const char *s1, const char *s2, const char *s3); int open_fd_or_get_path (struct ovl_layer *l, const char *path, char *out, int *fd, int flags); #define cleanup_file __attribute__ ((cleanup (cleanup_filep))) #define cleanup_free __attribute__ ((cleanup (cleanup_freep))) #define cleanup_close __attribute__ ((cleanup (cleanup_closep))) #define cleanup_dir __attribute__ ((cleanup (cleanup_dirp))) #define LIKELY(x) __builtin_expect ((x), 1) #define UNLIKELY(x) __builtin_expect ((x), 0) #ifdef HAVE_STATX void statx_to_stat (struct statx *stx, struct stat *st); #endif int safe_openat (int dirfd, const char *pathname, int flags, mode_t mode); int override_mode (struct ovl_layer *l, int fd, const char *abs_path, const char *path, struct stat *st); #endif