-From c1115e1503bf955c97f4cf3b925a6a9f619764c3 Mon Sep 17 00:00:00 2001
-From: Christian Brauner <brauner@kernel.org>
-Date: Tue, 9 Aug 2022 16:14:25 +0200
-Subject: [PATCH] build: detect where struct mount_attr is declared
-
-Fixes: #4176
-Signed-off-by: Christian Brauner (Microsoft) <christian.brauner@ubuntu.com>
-[Retrieved from:
-https://github.com/lxc/lxc/commit/c1115e1503bf955c97f4cf3b925a6a9f619764c3]
-Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
----
- src/lxc/conf.c | 6 +++---
- src/lxc/conf.h | 2 +-
- src/lxc/mount_utils.c | 6 +++---
- src/lxc/syscall_wrappers.h | 12 ++++++++++--
- 5 files changed, 45 insertions(+), 11 deletions(-)
-
-diff --git a/src/lxc/conf.c b/src/lxc/conf.c
-index ffbe74c2f6..4193cd07f5 100644
---- a/src/lxc/conf.c
-+++ b/src/lxc/conf.c
-@@ -2885,7 +2885,7 @@ static int __lxc_idmapped_mounts_child(struct lxc_handler *handler, FILE *f)
- struct lxc_mount_options opts = {};
- int dfd_from;
- const char *source_relative, *target_relative;
-- struct lxc_mount_attr attr = {};
-+ struct mount_attr attr = {};
-
- ret = parse_lxc_mount_attrs(&opts, mntent.mnt_opts);
- if (ret < 0)
-@@ -3005,7 +3005,7 @@ static int __lxc_idmapped_mounts_child(struct lxc_handler *handler, FILE *f)
-
- /* Set propagation mount options. */
- if (opts.attr.propagation) {
-- attr = (struct lxc_mount_attr) {
-+ attr = (struct mount_attr) {
- .propagation = opts.attr.propagation,
- };
-
-@@ -4109,7 +4109,7 @@ int lxc_idmapped_mounts_parent(struct lxc_handler *handler)
-
- for (;;) {
- __do_close int fd_from = -EBADF, fd_userns = -EBADF;
-- struct lxc_mount_attr attr = {};
-+ struct mount_attr attr = {};
- struct lxc_mount_options opts = {};
- ssize_t ret;
-
-diff --git a/src/lxc/conf.h b/src/lxc/conf.h
-index 7dc2f15b60..772479f9e1 100644
---- a/src/lxc/conf.h
-+++ b/src/lxc/conf.h
-@@ -223,7 +223,7 @@ struct lxc_mount_options {
- unsigned long mnt_flags;
- unsigned long prop_flags;
- char *data;
-- struct lxc_mount_attr attr;
-+ struct mount_attr attr;
- char *raw_options;
- };
-
-diff --git a/src/lxc/mount_utils.c b/src/lxc/mount_utils.c
-index bba75f933c..88dd73ee36 100644
---- a/src/lxc/mount_utils.c
-+++ b/src/lxc/mount_utils.c
-@@ -31,7 +31,7 @@ lxc_log_define(mount_utils, lxc);
- * setting in @attr_set, but must also specify MOUNT_ATTR__ATIME in the
- * @attr_clr field.
- */
--static inline void set_atime(struct lxc_mount_attr *attr)
-+static inline void set_atime(struct mount_attr *attr)
- {
- switch (attr->attr_set & MOUNT_ATTR__ATIME) {
- case MOUNT_ATTR_RELATIME:
-@@ -272,7 +272,7 @@ int create_detached_idmapped_mount(const char *path, int userns_fd,
- {
- __do_close int fd_tree_from = -EBADF;
- unsigned int open_tree_flags = OPEN_TREE_CLONE | OPEN_TREE_CLOEXEC;
-- struct lxc_mount_attr attr = {
-+ struct mount_attr attr = {
- .attr_set = MOUNT_ATTR_IDMAP | attr_set,
- .attr_clr = attr_clr,
- .userns_fd = userns_fd,
-@@ -335,7 +335,7 @@ int __fd_bind_mount(int dfd_from, const char *path_from, __u64 o_flags_from,
- __u64 attr_clr, __u64 propagation, int userns_fd,
- bool recursive)
- {
-- struct lxc_mount_attr attr = {
-+ struct mount_attr attr = {
- .attr_set = attr_set,
- .attr_clr = attr_clr,
- .propagation = propagation,
-diff --git a/src/lxc/syscall_wrappers.h b/src/lxc/syscall_wrappers.h
-index a5e98b565c..c8a7d0c7b7 100644
---- a/src/lxc/syscall_wrappers.h
-+++ b/src/lxc/syscall_wrappers.h
-@@ -18,6 +18,12 @@
- #include "macro.h"
- #include "syscall_numbers.h"
-
-+#if HAVE_STRUCT_MOUNT_ATTR
-+#include <sys/mount.h>
-+#elif HAVE_UAPI_STRUCT_MOUNT_ATTR
-+#include <linux/mount.h>
-+#endif
-+
- #ifdef HAVE_LINUX_MEMFD_H
- #include <linux/memfd.h>
- #endif
-@@ -210,16 +216,18 @@ extern int fsmount(int fs_fd, unsigned int flags, unsigned int attr_flags);
- /*
- * mount_setattr()
- */
--struct lxc_mount_attr {
-+#if !HAVE_STRUCT_MOUNT_ATTR && !HAVE_UAPI_STRUCT_MOUNT_ATTR
-+struct mount_attr {
- __u64 attr_set;
- __u64 attr_clr;
- __u64 propagation;
- __u64 userns_fd;
- };
-+#endif
-
- #if !HAVE_MOUNT_SETATTR
- static inline int mount_setattr(int dfd, const char *path, unsigned int flags,
-- struct lxc_mount_attr *attr, size_t size)
-+ struct mount_attr *attr, size_t size)
- {
- return syscall(__NR_mount_setattr, dfd, path, flags, attr, size);
- }
---- a/configure.ac 2022-11-21 22:26:58.649999866 +0100
-+++ b/configure.ac 2022-11-21 23:13:32.826666552 +0100
-@@ -701,7 +701,8 @@
- # Check for some syscalls functions
- AC_CHECK_FUNCS([setns pivot_root sethostname unshare rand_r confstr faccessat gettid memfd_create move_mount open_tree execveat clone3 fsopen fspick fsconfig fsmount openat2 close_range statvfs mount_setattr sigdescr_np])
- AC_CHECK_TYPES([__aligned_u64], [], [], [[#include <linux/types.h>]])
--AC_CHECK_TYPES([struct mount_attr], [], [], [[#include <linux/mount.h>]])
-+AC_CHECK_TYPES([struct mount_attr], [], [], [[#include <sys/mount.h>]])
-+AC_CHECK_TYPES([struct mount_attr], AC_DEFINE(HAVE_UAPI_STRUCT_MOUNT_ATTR,1,[mount_attr from <linux/mount.h>]), [], [[#include <linux/mount.h>]])
- AC_CHECK_TYPES([struct open_how], [], [], [[#include <linux/openat2.h>]])
- AC_CHECK_TYPES([struct clone_args], [], [], [[#include <linux/sched.h>]])
- AC_CHECK_MEMBERS([struct clone_args.set_tid],[],[],[[#include <linux/sched.h>]])