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syscalls: add fsopen()

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Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
This commit is contained in:
Christian Brauner 2020-07-22 10:50:20 +02:00
parent 8bdacc22a4
commit 49b21cd7d9
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GPG Key ID: 8EB056D53EECB12D
3 changed files with 31 additions and 1 deletions
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2
configure.ac
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@ -622,7 +622,7 @@ AC_CHECK_HEADER([ifaddrs.h],
AC_HEADER_MAJOR AC_HEADER_MAJOR
# Check for some syscalls functions # 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]) AC_CHECK_FUNCS([setns pivot_root sethostname unshare rand_r confstr faccessat gettid memfd_create move_mount open_tree execveat clone3 fsopen])
AC_CHECK_TYPES([struct clone_args], [], [], [[#include <linux/sched.h>]]) AC_CHECK_TYPES([struct clone_args], [], [], [[#include <linux/sched.h>]])
AC_CHECK_MEMBERS([struct clone_args.set_tid],[],[],[[#include <linux/sched.h>]]) AC_CHECK_MEMBERS([struct clone_args.set_tid],[],[],[[#include <linux/sched.h>]])
AC_CHECK_MEMBERS([struct clone_args.cgroup],[],[],[[#include <linux/sched.h>]]) AC_CHECK_MEMBERS([struct clone_args.cgroup],[],[],[[#include <linux/sched.h>]])

20
src/lxc/syscall_numbers.h
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@ -563,4 +563,24 @@
#endif #endif
#endif #endif
#ifndef __NR_fsopen
#if defined __alpha__
#define __NR_fsopen 540
#elif defined _MIPS_SIM
#if _MIPS_SIM == _MIPS_SIM_ABI32 /* o32 */
#define __NR_fsopen 4430
#endif
#if _MIPS_SIM == _MIPS_SIM_NABI32 /* n32 */
#define __NR_fsopen 6430
#endif
#if _MIPS_SIM == _MIPS_SIM_ABI64 /* n64 */
#define __NR_fsopen 5430
#endif
#elif defined __ia64__
#define __NR_fsopen (430 + 1024)
#else
#define __NR_fsopen 430
#endif
#endif
#endif /* __LXC_SYSCALL_NUMBERS_H */ #endif /* __LXC_SYSCALL_NUMBERS_H */

10
src/lxc/syscall_wrappers.h
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@ -161,4 +161,14 @@ static inline int open_tree_lxc(int dfd, const char *filename, unsigned int flag
extern int open_tree(int dfd, const char *filename, unsigned int flags); extern int open_tree(int dfd, const char *filename, unsigned int flags);
#endif #endif
#ifndef HAVE_FSOPEN
static inline int fsopen_lxc(const char *fs_name, unsigned int flags)
{
return syscall(__NR_fsopen, fs_name, flags);
}
#define fsopen fsopen_lxc
#else
extern int fsopen(const char *fs_name, unsigned int flags);
#endif
#endif /* __LXC_SYSCALL_WRAPPER_H */ #endif /* __LXC_SYSCALL_WRAPPER_H */