[LTP] [PATCH v5 2/3] Update lapi/futex.h fallback
Andrea Cervesato
andrea.cervesato@suse.de
Wed Feb 9 15:31:00 CET 2022
Added a complete futex.h definition with futex2 support
Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.de>
---
configure.ac | 3 +
include/lapi/futex.h | 180 ++++++++++++++++++
include/lapi/syscalls/aarch64.in | 1 +
include/lapi/syscalls/arc.in | 1 +
include/lapi/syscalls/arm.in | 1 +
include/lapi/syscalls/hppa.in | 1 +
include/lapi/syscalls/i386.in | 1 +
include/lapi/syscalls/ia64.in | 1 +
include/lapi/syscalls/mips_n32.in | 1 +
include/lapi/syscalls/mips_n64.in | 1 +
include/lapi/syscalls/mips_o32.in | 1 +
include/lapi/syscalls/powerpc.in | 1 +
include/lapi/syscalls/powerpc64.in | 1 +
include/lapi/syscalls/s390.in | 1 +
include/lapi/syscalls/s390x.in | 1 +
include/lapi/syscalls/sh.in | 1 +
include/lapi/syscalls/sparc.in | 1 +
include/lapi/syscalls/sparc64.in | 1 +
include/lapi/syscalls/x86_64.in | 1 +
lib/tst_checkpoint.c | 1 -
testcases/kernel/syscalls/clone/clone08.c | 1 -
.../syscalls/futex/futex_cmp_requeue01.c | 2 +-
.../syscalls/futex/futex_cmp_requeue02.c | 2 +-
23 files changed, 202 insertions(+), 4 deletions(-)
diff --git a/configure.ac b/configure.ac
index aeb486f69..b4a8427d0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -51,6 +51,7 @@ AC_CHECK_HEADERS_ONCE([ \
linux/close_range.h \
linux/dccp.h \
linux/fs.h \
+ linux/futex.h \
linux/genetlink.h \
linux/if_alg.h \
linux/if_ether.h \
@@ -216,6 +217,8 @@ AC_CHECK_TYPES([struct xt_entry_match, struct xt_entry_target],,,[
AC_CHECK_TYPES([struct __kernel_old_timeval, struct __kernel_old_timespec, struct __kernel_timespec,
struct __kernel_old_itimerspec, struct __kernel_itimerspec],,,[#include <sys/socket.h>])
+AC_CHECK_TYPES([struct futex_waitv],,,[#include <linux/futex.h>])
+
# Tools knobs
# Bash
diff --git a/include/lapi/futex.h b/include/lapi/futex.h
index 00b26c355..a05fcb89c 100644
--- a/include/lapi/futex.h
+++ b/include/lapi/futex.h
@@ -1,12 +1,14 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2015 Linux Test Project
+ * Copyright (C) 2021 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
*/
#ifndef LAPI_FUTEX_H__
#define LAPI_FUTEX_H__
#include <stdint.h>
+#include "config.h"
typedef volatile uint32_t futex_t;
@@ -14,4 +16,182 @@ typedef volatile uint32_t futex_t;
#define SYS_futex SYS_futex_time64
#endif
+#ifdef HAVE_LINUX_FUTEX_H
+# include <linux/futex.h>
+#else
+#include <unistd.h>
+
+#define FUTEX_WAIT 0
+#define FUTEX_WAKE 1
+#define FUTEX_FD 2
+#define FUTEX_REQUEUE 3
+#define FUTEX_CMP_REQUEUE 4
+#define FUTEX_WAKE_OP 5
+#define FUTEX_LOCK_PI 6
+#define FUTEX_UNLOCK_PI 7
+#define FUTEX_TRYLOCK_PI 8
+#define FUTEX_WAIT_BITSET 9
+#define FUTEX_WAKE_BITSET 10
+#define FUTEX_WAIT_REQUEUE_PI 11
+#define FUTEX_CMP_REQUEUE_PI 12
+#define FUTEX_LOCK_PI2 13
+
+#define FUTEX_PRIVATE_FLAG 128
+#define FUTEX_CLOCK_REALTIME 256
+#define FUTEX_CMD_MASK ~(FUTEX_PRIVATE_FLAG | FUTEX_CLOCK_REALTIME)
+
+#define FUTEX_WAIT_PRIVATE (FUTEX_WAIT | FUTEX_PRIVATE_FLAG)
+#define FUTEX_WAKE_PRIVATE (FUTEX_WAKE | FUTEX_PRIVATE_FLAG)
+#define FUTEX_REQUEUE_PRIVATE (FUTEX_REQUEUE | FUTEX_PRIVATE_FLAG)
+#define FUTEX_CMP_REQUEUE_PRIVATE (FUTEX_CMP_REQUEUE | FUTEX_PRIVATE_FLAG)
+#define FUTEX_WAKE_OP_PRIVATE (FUTEX_WAKE_OP | FUTEX_PRIVATE_FLAG)
+#define FUTEX_LOCK_PI_PRIVATE (FUTEX_LOCK_PI | FUTEX_PRIVATE_FLAG)
+#define FUTEX_LOCK_PI2_PRIVATE (FUTEX_LOCK_PI2 | FUTEX_PRIVATE_FLAG)
+#define FUTEX_UNLOCK_PI_PRIVATE (FUTEX_UNLOCK_PI | FUTEX_PRIVATE_FLAG)
+#define FUTEX_TRYLOCK_PI_PRIVATE (FUTEX_TRYLOCK_PI | FUTEX_PRIVATE_FLAG)
+#define FUTEX_WAIT_BITSET_PRIVATE (FUTEX_WAIT_BITSET | FUTEX_PRIVATE_FLAG)
+#define FUTEX_WAKE_BITSET_PRIVATE (FUTEX_WAKE_BITSET | FUTEX_PRIVATE_FLAG)
+#define FUTEX_WAIT_REQUEUE_PI_PRIVATE (FUTEX_WAIT_REQUEUE_PI | \
+ FUTEX_PRIVATE_FLAG)
+#define FUTEX_CMP_REQUEUE_PI_PRIVATE (FUTEX_CMP_REQUEUE_PI | \
+ FUTEX_PRIVATE_FLAG)
+
+/*
+ * Support for robust futexes: the kernel cleans up held futexes at
+ * thread exit time.
+ */
+
+/*
+ * Per-lock list entry - embedded in user-space locks, somewhere close
+ * to the futex field. (Note: user-space uses a double-linked list to
+ * achieve O(1) list add and remove, but the kernel only needs to know
+ * about the forward link)
+ *
+ * NOTE: this structure is part of the syscall ABI, and must not be
+ * changed.
+ */
+struct robust_list {
+ struct robust_list *next;
+};
+
+/*
+ * Per-thread list head:
+ *
+ * NOTE: this structure is part of the syscall ABI, and must only be
+ * changed if the change is first communicated with the glibc folks.
+ * (When an incompatible change is done, we'll increase the structure
+ * size, which glibc will detect)
+ */
+struct robust_list_head {
+ /*
+ * The head of the list. Points back to itself if empty:
+ */
+ struct robust_list list;
+
+ /*
+ * This relative offset is set by user-space, it gives the kernel
+ * the relative position of the futex field to examine. This way
+ * we keep userspace flexible, to freely shape its data-structure,
+ * without hardcoding any particular offset into the kernel:
+ */
+ long futex_offset;
+
+ /*
+ * The death of the thread may race with userspace setting
+ * up a lock's links. So to handle this race, userspace first
+ * sets this field to the address of the to-be-taken lock,
+ * then does the lock acquire, and then adds itself to the
+ * list, and then clears this field. Hence the kernel will
+ * always have full knowledge of all locks that the thread
+ * _might_ have taken. We check the owner TID in any case,
+ * so only truly owned locks will be handled.
+ */
+ struct robust_list *list_op_pending;
+};
+
+/*
+ * Are there any waiters for this robust futex:
+ */
+#define FUTEX_WAITERS 0x80000000
+
+/*
+ * The kernel signals via this bit that a thread holding a futex
+ * has exited without unlocking the futex. The kernel also does
+ * a FUTEX_WAKE on such futexes, after setting the bit, to wake
+ * up any possible waiters:
+ */
+#define FUTEX_OWNER_DIED 0x40000000
+
+/*
+ * The rest of the robust-futex field is for the TID:
+ */
+#define FUTEX_TID_MASK 0x3fffffff
+
+/*
+ * This limit protects against a deliberately circular list.
+ * (Not worth introducing an rlimit for it)
+ */
+#define ROBUST_LIST_LIMIT 2048
+
+/*
+ * bitset with all bits set for the FUTEX_xxx_BITSET OPs to request a
+ * match of any bit.
+ */
+#define FUTEX_BITSET_MATCH_ANY 0xffffffff
+
+
+#define FUTEX_OP_SET 0 /* *(int *)UADDR2 = OPARG; */
+#define FUTEX_OP_ADD 1 /* *(int *)UADDR2 += OPARG; */
+#define FUTEX_OP_OR 2 /* *(int *)UADDR2 |= OPARG; */
+#define FUTEX_OP_ANDN 3 /* *(int *)UADDR2 &= ~OPARG; */
+#define FUTEX_OP_XOR 4 /* *(int *)UADDR2 ^= OPARG; */
+
+#define FUTEX_OP_OPARG_SHIFT 8 /* Use (1 << OPARG) instead of OPARG. */
+
+#define FUTEX_OP_CMP_EQ 0 /* if (oldval == CMPARG) wake */
+#define FUTEX_OP_CMP_NE 1 /* if (oldval != CMPARG) wake */
+#define FUTEX_OP_CMP_LT 2 /* if (oldval < CMPARG) wake */
+#define FUTEX_OP_CMP_LE 3 /* if (oldval <= CMPARG) wake */
+#define FUTEX_OP_CMP_GT 4 /* if (oldval > CMPARG) wake */
+#define FUTEX_OP_CMP_GE 5 /* if (oldval >= CMPARG) wake */
+
+/* FUTEX_WAKE_OP will perform atomically
+ int oldval = *(int *)UADDR2;
+ *(int *)UADDR2 = oldval OP OPARG;
+ if (oldval CMP CMPARG)
+ wake UADDR2; */
+
+#define FUTEX_OP(op, oparg, cmp, cmparg) \
+ (((op & 0xf) << 28) | ((cmp & 0xf) << 24) \
+ | ((oparg & 0xfff) << 12) | (cmparg & 0xfff))
+
+#endif /* HAVE_LINUX_FUTEX_H */
+
+#ifndef HAVE_STRUCT_FUTEX_WAITV
+/*
+ * Flags to specify the bit length of the futex word for futex2 syscalls.
+ * Currently, only 32 is supported.
+ */
+#define FUTEX_32 2
+
+/*
+ * Max numbers of elements in a futex_waitv array
+ */
+#define FUTEX_WAITV_MAX 128
+
+/**
+ * struct futex_waitv - A waiter for vectorized wait
+ * @val: Expected value at uaddr
+ * @uaddr: User address to wait on
+ * @flags: Flags for this waiter
+ * @__reserved: Reserved member to preserve data alignment. Should be 0.
+ */
+struct futex_waitv {
+ uint64_t val;
+ uint64_t uaddr;
+ uint32_t flags;
+ uint32_t __reserved;
+};
+#endif /* HAVE_STRUCT_FUTEX_WAITV */
+
#endif /* LAPI_FUTEX_H__ */
diff --git a/include/lapi/syscalls/aarch64.in b/include/lapi/syscalls/aarch64.in
index 89b63ee4b..de4ed5fb1 100644
--- a/include/lapi/syscalls/aarch64.in
+++ b/include/lapi/syscalls/aarch64.in
@@ -295,4 +295,5 @@ openat2 437
pidfd_getfd 438
epoll_pwait2 441
quotactl_fd 443
+futex_waitv 449
_sysctl 1078
diff --git a/include/lapi/syscalls/arc.in b/include/lapi/syscalls/arc.in
index 72420754a..9f11381db 100644
--- a/include/lapi/syscalls/arc.in
+++ b/include/lapi/syscalls/arc.in
@@ -315,3 +315,4 @@ openat2 437
pidfd_getfd 438
epoll_pwait2 441
quotactl_fd 443
+futex_waitv 449
diff --git a/include/lapi/syscalls/arm.in b/include/lapi/syscalls/arm.in
index 2a78d7c3c..4b0f63a28 100644
--- a/include/lapi/syscalls/arm.in
+++ b/include/lapi/syscalls/arm.in
@@ -393,3 +393,4 @@ openat2 (__NR_SYSCALL_BASE+437)
pidfd_getfd (__NR_SYSCALL_BASE+438)
epoll_pwait2 (__NR_SYSCALL_BASE+441)
quotactl_fd (__NR_SYSCALL_BASE+443)
+futex_waitv (__NR_SYSCALL_BASE+449)
diff --git a/include/lapi/syscalls/hppa.in b/include/lapi/syscalls/hppa.in
index 2f0fc8153..b6d32d386 100644
--- a/include/lapi/syscalls/hppa.in
+++ b/include/lapi/syscalls/hppa.in
@@ -42,3 +42,4 @@ pidfd_open 434
close_range 436
epoll_pwait2 441
quotactl_fd 443
+futex_waitv 449
diff --git a/include/lapi/syscalls/i386.in b/include/lapi/syscalls/i386.in
index 34a8a621f..d0e6e9a4b 100644
--- a/include/lapi/syscalls/i386.in
+++ b/include/lapi/syscalls/i386.in
@@ -429,3 +429,4 @@ openat2 437
pidfd_getfd 438
epoll_pwait2 441
quotactl_fd 443
+futex_waitv 449
diff --git a/include/lapi/syscalls/ia64.in b/include/lapi/syscalls/ia64.in
index b729cd3f0..123200624 100644
--- a/include/lapi/syscalls/ia64.in
+++ b/include/lapi/syscalls/ia64.in
@@ -342,3 +342,4 @@ openat2 1461
pidfd_getfd 1462
epoll_pwait2 1465
quotactl_fd 1467
+futex_waitv 1473
diff --git a/include/lapi/syscalls/mips_n32.in b/include/lapi/syscalls/mips_n32.in
index 46098a616..e818c9d92 100644
--- a/include/lapi/syscalls/mips_n32.in
+++ b/include/lapi/syscalls/mips_n32.in
@@ -370,3 +370,4 @@ process_madvise 6440
epoll_pwait2 6441
mount_setattr 6442
quotactl_fd 6443
+futex_waitv 6449
diff --git a/include/lapi/syscalls/mips_n64.in b/include/lapi/syscalls/mips_n64.in
index 07f96ac5d..6e15f43b3 100644
--- a/include/lapi/syscalls/mips_n64.in
+++ b/include/lapi/syscalls/mips_n64.in
@@ -346,3 +346,4 @@ process_madvise 5440
epoll_pwait2 5441
mount_setattr 5442
quotactl_fd 5443
+futex_waitv 5449
diff --git a/include/lapi/syscalls/mips_o32.in b/include/lapi/syscalls/mips_o32.in
index 5e64a4a1c..921d5d331 100644
--- a/include/lapi/syscalls/mips_o32.in
+++ b/include/lapi/syscalls/mips_o32.in
@@ -416,3 +416,4 @@ process_madvise 4440
epoll_pwait2 4441
mount_setattr 4442
quotactl_fd 4443
+futex_waitv 4449
diff --git a/include/lapi/syscalls/powerpc.in b/include/lapi/syscalls/powerpc.in
index f4e85940c..d5de621e1 100644
--- a/include/lapi/syscalls/powerpc.in
+++ b/include/lapi/syscalls/powerpc.in
@@ -422,3 +422,4 @@ openat2 437
pidfd_getfd 438
epoll_pwait2 441
quotactl_fd 443
+futex_waitv 449
diff --git a/include/lapi/syscalls/powerpc64.in b/include/lapi/syscalls/powerpc64.in
index f4e85940c..d5de621e1 100644
--- a/include/lapi/syscalls/powerpc64.in
+++ b/include/lapi/syscalls/powerpc64.in
@@ -422,3 +422,4 @@ openat2 437
pidfd_getfd 438
epoll_pwait2 441
quotactl_fd 443
+futex_waitv 449
diff --git a/include/lapi/syscalls/s390.in b/include/lapi/syscalls/s390.in
index 3e16d8475..6505f3822 100644
--- a/include/lapi/syscalls/s390.in
+++ b/include/lapi/syscalls/s390.in
@@ -409,3 +409,4 @@ openat2 437
pidfd_getfd 438
epoll_pwait2 441
quotactl_fd 443
+futex_waitv 449
diff --git a/include/lapi/syscalls/s390x.in b/include/lapi/syscalls/s390x.in
index beb0819af..bc5d2b34c 100644
--- a/include/lapi/syscalls/s390x.in
+++ b/include/lapi/syscalls/s390x.in
@@ -357,3 +357,4 @@ openat2 437
pidfd_getfd 438
epoll_pwait2 441
quotactl_fd 443
+futex_waitv 449
diff --git a/include/lapi/syscalls/sh.in b/include/lapi/syscalls/sh.in
index a81cf8297..316ffe5f1 100644
--- a/include/lapi/syscalls/sh.in
+++ b/include/lapi/syscalls/sh.in
@@ -403,3 +403,4 @@ openat2 437
pidfd_getfd 438
epoll_pwait2 441
quotactl_fd 443
+futex_waitv 449
diff --git a/include/lapi/syscalls/sparc.in b/include/lapi/syscalls/sparc.in
index 6a7817ae5..e0c60a360 100644
--- a/include/lapi/syscalls/sparc.in
+++ b/include/lapi/syscalls/sparc.in
@@ -408,3 +408,4 @@ openat2 437
pidfd_getfd 438
epoll_pwait2 441
quotactl_fd 443
+futex_waitv 449
diff --git a/include/lapi/syscalls/sparc64.in b/include/lapi/syscalls/sparc64.in
index d3995181c..0acde6856 100644
--- a/include/lapi/syscalls/sparc64.in
+++ b/include/lapi/syscalls/sparc64.in
@@ -373,3 +373,4 @@ openat2 437
pidfd_getfd 438
epoll_pwait2 441
quotactl_fd 443
+futex_waitv 449
diff --git a/include/lapi/syscalls/x86_64.in b/include/lapi/syscalls/x86_64.in
index a5b2a24fe..1863e1df7 100644
--- a/include/lapi/syscalls/x86_64.in
+++ b/include/lapi/syscalls/x86_64.in
@@ -350,6 +350,7 @@ openat2 437
pidfd_getfd 438
epoll_pwait2 441
quotactl_fd 443
+futex_waitv 449
rt_sigaction 512
rt_sigreturn 513
ioctl 514
diff --git a/lib/tst_checkpoint.c b/lib/tst_checkpoint.c
index b41986f0c..6a294b28b 100644
--- a/lib/tst_checkpoint.c
+++ b/lib/tst_checkpoint.c
@@ -25,7 +25,6 @@
#include <limits.h>
#include <errno.h>
#include <sys/syscall.h>
-#include <linux/futex.h>
#include "test.h"
#include "safe_macros.h"
diff --git a/testcases/kernel/syscalls/clone/clone08.c b/testcases/kernel/syscalls/clone/clone08.c
index 3de1fe9bb..ad285a497 100644
--- a/testcases/kernel/syscalls/clone/clone08.c
+++ b/testcases/kernel/syscalls/clone/clone08.c
@@ -11,7 +11,6 @@
#include <errno.h>
#include <sched.h>
#include <sys/wait.h>
-#include <linux/futex.h>
#include "tst_test.h"
#include "clone_platform.h"
diff --git a/testcases/kernel/syscalls/futex/futex_cmp_requeue01.c b/testcases/kernel/syscalls/futex/futex_cmp_requeue01.c
index 13e67c758..bef44838e 100644
--- a/testcases/kernel/syscalls/futex/futex_cmp_requeue01.c
+++ b/testcases/kernel/syscalls/futex/futex_cmp_requeue01.c
@@ -12,12 +12,12 @@
#include <errno.h>
#include <sys/wait.h>
#include <stdlib.h>
-#include <linux/futex.h>
#include <sys/time.h>
#include "tst_timer_test.h"
#include "tst_test.h"
#include "futextest.h"
+#include "lapi/futex.h"
struct shared_data {
futex_t futexes[2];
diff --git a/testcases/kernel/syscalls/futex/futex_cmp_requeue02.c b/testcases/kernel/syscalls/futex/futex_cmp_requeue02.c
index 0514b0ba4..073ea3bf6 100644
--- a/testcases/kernel/syscalls/futex/futex_cmp_requeue02.c
+++ b/testcases/kernel/syscalls/futex/futex_cmp_requeue02.c
@@ -13,11 +13,11 @@
*/
#include <errno.h>
-#include <linux/futex.h>
#include <sys/time.h>
#include "tst_test.h"
#include "futextest.h"
+#include "lapi/futex.h"
static futex_t *futexes;
--
2.35.1
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