The struct btrfs_ioctl_vol_args_v2 in /usr/include/linux/btrfs.h on
my system predates the inclusion of the "subvolid" field. This
causes the following build failure:
idmapped-mounts.c: In function 'btrfs_delete_subvolume_id':
idmapped-mounts.c:9730:6: error: 'struct btrfs_ioctl_vol_args_v2' has no member named 'subvolid'
9730 | args.subvolid = subvolid;
| ^
Since this source file contains its own more uptodate copy of that
structure, add some more autoconf/cpp magic so that we can override
the struct definition if the system header doesn't have the desired
field.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Reviewed-by: Zorro Lang <zlang@redhat.com>
Reviewed-by: Anju T Sudhakar<anju@linux.vnet.ibm.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
AC_CHECK_TYPES([struct btrfs_ioctl_ino_lookup_user_args], [], [], [[#include <linux/btrfs.h>]])
AC_CHECK_TYPES([struct btrfs_ioctl_get_subvol_rootref_args], [], [], [[#include <linux/btrfs.h>]])
AC_CHECK_HEADERS([linux/btrfs.h linux/btrfs_tree.h])
-
+AC_CHECK_MEMBERS([struct btrfs_ioctl_vol_args_v2.subvolid], [], [], [[#include <linux/btrfs.h>]])
AC_CONFIG_HEADER(include/config.h)
AC_CONFIG_FILES([include/builddefs])
#include <unistd.h>
#ifdef HAVE_LINUX_BTRFS_H
+# ifndef HAVE_STRUCT_BTRFS_IOCTL_VOL_ARGS_V2_SUBVOLID
+# define btrfs_ioctl_vol_args_v2 override_btrfs_ioctl_vol_args_v2
+# endif
#include <linux/btrfs.h>
+# undef btrfs_ioctl_vol_args_v2
#endif
#ifdef HAVE_LINUX_BTRFS_TREE_H
};
#endif
-#ifndef HAVE_STRUCT_BTRFS_IOCTL_VOL_ARGS_V2
+#if !defined(HAVE_STRUCT_BTRFS_IOCTL_VOL_ARGS_V2) || !defined(HAVE_STRUCT_BTRFS_IOCTL_VOL_ARGS_V2_SUBVOLID)
#ifndef BTRFS_SUBVOL_NAME_MAX
#define BTRFS_SUBVOL_NAME_MAX 4039