diff mbox series

[V2,1/6] include: Add declaration of struct semid64_ds

Message ID d11e74663f3ea7e3765d36597a6bfbaa0c70b7d7.1592302358.git.viresh.kumar@linaro.org
State Accepted
Headers show
Series syscalls: Add tests to verify the _time_high fields | expand

Commit Message

Viresh Kumar June 16, 2020, 10:20 a.m. UTC 
This adds declaration of struct semid64_ds, which will be used by
following patches.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 configure.ac          |   1 +
 include/lapi/sembuf.h | 234 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 235 insertions(+)
 create mode 100644 include/lapi/sembuf.h
diff mbox series

Patch

diff --git a/configure.ac b/configure.ac
index eaf33dd60350..c513fdf440c2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -151,6 +151,7 @@  AC_CHECK_TYPES([struct fs_quota_statv],,,[#include <xfs/xqm.h>])
 AC_CHECK_TYPES([struct if_nextdqblk],,,[#include <linux/quota.h>])
 AC_CHECK_TYPES([struct iovec],,,[#include <sys/uio.h>])
 AC_CHECK_TYPES([struct ipc64_perm],,,[#include <sys/ipcbuf.h>])
+AC_CHECK_TYPES([struct semid64_ds],,,[#include <sys/sem.h>])
 
 AC_CHECK_TYPES([struct mmsghdr],,,[
 #define _GNU_SOURCE
diff --git a/include/lapi/sembuf.h b/include/lapi/sembuf.h
new file mode 100644
index 000000000000..00263abca995
--- /dev/null
+++ b/include/lapi/sembuf.h
@@ -0,0 +1,234 @@ 
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2020 Linaro Limited. All rights reserved.
+ * Author: Viresh Kumar <viresh.kumar@linaro.org>
+ */
+
+#ifndef IPC_SEMBUF_H
+#define IPC_SEMBUF_H
+
+#include <linux/posix_types.h>
+#include <sys/sem.h>
+#include "tst_timer.h"
+#include "ipcbuf.h"
+
+#ifndef HAVE_SEMID64_DS
+
+#if defined(__mips__)
+#define HAVE_SEMID64_DS
+/*
+ * The semid64_ds structure for the MIPS architecture.
+ * Note extra padding because this structure is passed back and forth
+ * between kernel and user space.
+ *
+ * Pad space is left for 2 miscellaneous 64-bit values on mips64,
+ * but used for the upper 32 bit of the time values on mips32.
+ */
+#if defined(__arch64__)
+struct semid64_ds {
+	struct ipc64_perm sem_perm;		/* permissions .. see ipc.h */
+	long		 sem_otime;		/* last semop time */
+	long		 sem_ctime;		/* last change time */
+	unsigned long	sem_nsems;		/* no. of semaphores in array */
+	unsigned long	__unused1;
+	unsigned long	__unused2;
+};
+#else
+#define HAVE_SEMID64_DS_TIME_HIGH
+struct semid64_ds {
+	struct ipc64_perm sem_perm;		/* permissions .. see ipc.h */
+	unsigned long   sem_otime;		/* last semop time */
+	unsigned long   sem_ctime;		/* last change time */
+	unsigned long	sem_nsems;		/* no. of semaphores in array */
+	unsigned long	sem_otime_high;
+	unsigned long	sem_ctime_high;
+};
+#endif
+#endif /* __mips__ */
+
+#if defined(__hppa__)
+#define HAVE_SEMID64_DS
+/*
+ * The semid64_ds structure for parisc architecture.
+ * Note extra padding because this structure is passed back and forth
+ * between kernel and user space.
+ *
+ * Pad space is left for:
+ * - 2 miscellaneous 32-bit values
+ */
+struct semid64_ds {
+	struct ipc64_perm sem_perm;		/* permissions .. see ipc.h */
+#if __BITS_PER_LONG == 64
+	long		sem_otime;		/* last semop time */
+	long		sem_ctime;		/* last change time */
+#else
+#define HAVE_SEMID64_DS_TIME_HIGH
+	unsigned long	sem_otime_high;
+	unsigned long	sem_otime;		/* last semop time */
+	unsigned long	sem_ctime_high;
+	unsigned long	sem_ctime;		/* last change time */
+#endif
+	unsigned long	sem_nsems;		/* no. of semaphores in array */
+	unsigned long	__unused1;
+	unsigned long	__unused2;
+};
+#endif /* __hppa__ */
+
+#if defined(__powerpc__) || defined(__powerpc64__)
+#define HAVE_SEMID64_DS
+/*
+ * The semid64_ds structure for PPC architecture.
+ * Note extra padding because this structure is passed back and forth
+ * between kernel and user space.
+ *
+ * Pad space is left for:
+ * - 2 miscellaneous 32/64-bit values
+ */
+
+struct semid64_ds {
+	struct ipc64_perm sem_perm;	/* permissions .. see ipc.h */
+#ifndef __powerpc64__
+#define HAVE_SEMID64_DS_TIME_HIGH
+	unsigned long	sem_otime_high;
+	unsigned long	sem_otime;	/* last semop time */
+	unsigned long	sem_ctime_high;
+	unsigned long	sem_ctime;	/* last change time */
+#else
+	long		sem_otime;	/* last semop time */
+	long		sem_ctime;	/* last change time */
+#endif
+	unsigned long	sem_nsems;	/* no. of semaphores in array */
+	unsigned long	__unused3;
+	unsigned long	__unused4;
+};
+#endif /* defined(__powerpc__) || defined(__powerpc64__) */
+
+#if defined(__sparc__)
+#define HAVE_SEMID64_DS
+/*
+ * The semid64_ds structure for sparc architecture.
+ * Note extra padding because this structure is passed back and forth
+ * between kernel and user space.
+ *
+ * Pad space is left for:
+ * - 2 miscellaneous 32-bit values
+ */
+
+struct semid64_ds {
+	struct ipc64_perm sem_perm;		/* permissions .. see ipc.h */
+#if defined(__arch64__)
+	long		sem_otime;		/* last semop time */
+	long		sem_ctime;		/* last change time */
+#else
+#define HAVE_SEMID64_DS_TIME_HIGH
+	unsigned long	sem_otime_high;
+	unsigned long	sem_otime;		/* last semop time */
+	unsigned long	sem_ctime_high;
+	unsigned long	sem_ctime;		/* last change time */
+#endif
+	unsigned long	sem_nsems;		/* no. of semaphores in array */
+	unsigned long	__unused1;
+	unsigned long	__unused2;
+};
+#endif /* __sparc__ */
+
+#if defined(__x86_64__)
+#define HAVE_SEMID64_DS
+/*
+ * The semid64_ds structure for x86 architecture.
+ * Note extra padding because this structure is passed back and forth
+ * between kernel and user space.
+ *
+ * Pad space is left for:
+ * - 2 miscellaneous 32-bit values
+ *
+ * x86_64 and x32 incorrectly added padding here, so the structures
+ * are still incompatible with the padding on x86.
+ */
+struct semid64_ds {
+	struct ipc64_perm sem_perm;	/* permissions .. see ipc.h */
+#ifdef __i386__
+#define HAVE_SEMID64_DS_TIME_HIGH
+	unsigned long	sem_otime;	/* last semop time */
+	unsigned long	sem_otime_high;
+	unsigned long	sem_ctime;	/* last change time */
+	unsigned long	sem_ctime_high;
+#else
+	__kernel_long_t sem_otime;	/* last semop time */
+	__kernel_ulong_t __unused1;
+	__kernel_long_t sem_ctime;	/* last change time */
+	__kernel_ulong_t __unused2;
+#endif
+	__kernel_ulong_t sem_nsems;	/* no. of semaphores in array */
+	__kernel_ulong_t __unused3;
+	__kernel_ulong_t __unused4;
+};
+#endif /* defined(__x86_64__) */
+
+#if defined(__xtensa__)
+#define HAVE_SEMID64_DS
+#define HAVE_SEMID64_DS_TIME_HIGH
+
+struct semid64_ds {
+	struct ipc64_perm sem_perm;		/* permissions .. see ipc.h */
+#ifdef __XTENSA_EL__
+	unsigned long	sem_otime;		/* last semop time */
+	unsigned long	sem_otime_high;
+	unsigned long	sem_ctime;		/* last change time */
+	unsigned long	sem_ctime_high;
+#else
+	unsigned long	sem_otime_high;
+	unsigned long	sem_otime;		/* last semop time */
+	unsigned long	sem_ctime_high;
+	unsigned long	sem_ctime;		/* last change time */
+#endif
+	unsigned long	sem_nsems;		/* no. of semaphores in array */
+	unsigned long	__unused3;
+	unsigned long	__unused4;
+};
+
+#endif /* __xtensa__ */
+
+#ifndef HAVE_SEMID64_DS
+/*
+ * The semid64_ds structure for most architectures (though it came
+ * from x86_32 originally). Note extra padding because this structure
+ * is passed back and forth between kernel and user space.
+ *
+ * semid64_ds was originally meant to be architecture specific, but
+ * everyone just ended up making identical copies without specific
+ * optimizations, so we may just as well all use the same one.
+ *
+ * 64 bit architectures use a 64-bit long time field here, while
+ * 32 bit architectures have a pair of unsigned long values.
+ *
+ * On big-endian systems, the padding is in the wrong place for
+ * historic reasons, so user space has to reconstruct a time_t
+ * value using
+ *
+ * user_semid_ds.sem_otime = kernel_semid64_ds.sem_otime +
+ *		((long long)kernel_semid64_ds.sem_otime_high << 32)
+ *
+ * Pad space is left for 2 miscellaneous 32-bit values
+ */
+struct semid64_ds {
+	struct ipc64_perm sem_perm;	/* permissions .. see ipc.h */
+#if __BITS_PER_LONG == 64
+	long		sem_otime;	/* last semop time */
+	long		sem_ctime;	/* last change time */
+#else
+#define HAVE_SEMID64_DS_TIME_HIGH
+	unsigned long	sem_otime;	/* last semop time */
+	unsigned long	sem_otime_high;
+	unsigned long	sem_ctime;	/* last change time */
+	unsigned long	sem_ctime_high;
+#endif
+	unsigned long	sem_nsems;	/* no. of semaphores in array */
+	unsigned long	__unused3;
+	unsigned long	__unused4;
+};
+#endif /* semid64_ds */
+
+#endif /* HAVE_SEMID64_DS */
+
+#endif /* IPC_SEMBUF_H */