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/*
* Check decoding of io_uring_setup syscall.
*
* Copyright (c) 2019 Dmitry V. Levin <ldv@altlinux.org>
* Copyright (c) 2019-2020 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include <unistd.h>
#include "scno.h"
#if defined HAVE_LINUX_IO_URING_H && defined __NR_io_uring_setup
# include <fcntl.h>
# include <stdio.h>
# include <stdint.h>
# include <string.h>
# include <linux/io_uring.h>
# include <sys/stat.h>
# include <sys/types.h>
# include "print_fields.h"
# include "xlat.h"
# include "xlat/uring_setup_features.h"
# include "xlat/uring_cqring_flags.h"
# ifdef HAVE_STRUCT_IO_URING_PARAMS_FEATURES
# ifdef HAVE_STRUCT_IO_URING_PARAMS_WQ_FD
# define RESV_START 0
# else
# define RESV_START 1
# endif
# else /* !HAVE_STRUCT_IO_URING_PARAMS_FEATURES */
# define RESV_START 2
# endif /* HAVE_STRUCT_IO_URING_PARAMS_FEATURES */
static const char *errstr;
static long
sys_io_uring_setup(uint32_t nentries, const void *params)
{
kernel_ulong_t fill = (kernel_ulong_t) 0xdefaced00000000ULL;
kernel_ulong_t bad = (kernel_ulong_t) 0xbadc0dedbadc0dedULL;
kernel_ulong_t arg1 = fill | nentries;
kernel_ulong_t arg2 = (unsigned long) params;
long rc = syscall(__NR_io_uring_setup, arg1, arg2, bad, bad, bad, bad);
errstr = sprintrc(rc);
return rc;
}
int
main(void)
{
static const char path_full[] = "/dev/full";
long rc;
TAIL_ALLOC_OBJECT_CONST_PTR(struct io_uring_params, params);
const void *efault = (const void *) params + 1;
skip_if_unavailable("/proc/self/fd/");
int fd_full = open(path_full, O_RDONLY);
if (fd_full < 0)
perror_msg_and_fail("open: %s", path_full);
sys_io_uring_setup(-1U, NULL);
printf("io_uring_setup(%u, NULL) = %s\n", -1U, errstr);
sys_io_uring_setup(0, efault);
printf("io_uring_setup(%u, %p) = %s\n", 0, efault, errstr);
fill_memory(params, sizeof(*params));
params->flags = -1;
sys_io_uring_setup(1, params);
printf("io_uring_setup(%u, {flags=IORING_SETUP_IOPOLL"
"|IORING_SETUP_SQPOLL|IORING_SETUP_SQ_AFF|IORING_SETUP_CQSIZE"
"|IORING_SETUP_CLAMP|IORING_SETUP_ATTACH_WQ"
"|IORING_SETUP_R_DISABLED|%#x"
", sq_thread_cpu=%#x, sq_thread_idle=%u, wq_fd=%d, resv=[",
1, -1U - 127, params->sq_thread_cpu, params->sq_thread_idle,
# if defined HAVE_STRUCT_IO_URING_PARAMS_WQ_FD
params->wq_fd
# elif defined HAVE_STRUCT_IO_URING_PARAMS_FEATURES
params->resv[0]
# else
params->resv[1]
# endif
);
for (unsigned int i = RESV_START; i < ARRAY_SIZE(params->resv); ++i)
printf("%s%#x", i != RESV_START ? ", " : "", params->resv[i]);
printf("]}) = %s\n", errstr);
for (size_t i = 0; i < 2; i++) {
memset(params, 0, sizeof(*params));
# if defined HAVE_STRUCT_IO_URING_PARAMS_WQ_FD
params->wq_fd
# elif defined HAVE_STRUCT_IO_URING_PARAMS_FEATURES
params->resv[0]
# else
params->resv[1]
# endif
= i == 1 ? fd_full : -1;
params->flags = i == 1 ? 32 : 0;
rc = sys_io_uring_setup(2, params);
printf("io_uring_setup(%u, {flags=%s, sq_thread_cpu=0"
", sq_thread_idle=0",
2, i == 1 ? "IORING_SETUP_ATTACH_WQ" : "0");
if (i == 1)
printf(", wq_fd=%d<%s>", fd_full, path_full);
if (rc < 0) {
printf("}) = %s\n", errstr);
} else {
printf(", sq_entries=%u, cq_entries=%u, features=",
params->sq_entries,
params->cq_entries);
printflags(uring_setup_features,
# ifdef HAVE_STRUCT_IO_URING_PARAMS_FEATURES
params->features,
# else
params->resv[0],
# endif
"IORING_FEAT_???");
printf(", sq_off={head=%u, tail=%u, ring_mask=%u"
", ring_entries=%u, flags=%u, dropped=%u"
", array=%u",
params->sq_off.head,
params->sq_off.tail,
params->sq_off.ring_mask,
params->sq_off.ring_entries,
params->sq_off.flags,
params->sq_off.dropped,
params->sq_off.array);
if (params->sq_off.resv1)
printf(", resv1=%#x", params->sq_off.resv1);
if (params->sq_off.resv2)
printf(", resv1=%#llx",
(unsigned long long)
params->sq_off.resv2);
printf("}, cq_off={head=%u, tail=%u, ring_mask=%u"
", ring_entries=%u, overflow=%u, cqes=%u, flags=",
params->cq_off.head,
params->cq_off.tail,
params->cq_off.ring_mask,
params->cq_off.ring_entries,
params->cq_off.overflow,
params->cq_off.cqes);
# ifdef HAVE_STRUCT_IO_CQRING_OFFSETS_FLAGS
printflags(uring_cqring_flags,
params->cq_off.flags,
"IORING_CQ_???");
if (params->cq_off.resv1)
printf(", resv1=%#x", params->cq_off.resv1);
if (params->cq_off.resv2)
printf(", resv2=%#llx",
(unsigned long long)
params->cq_off.resv2);
# else
union {
struct {
uint32_t flags;
uint32_t resv1;
} s;
uint64_t v;
} u = { .v = params->cq_off.resv[0] };
printflags(uring_cqring_flags, u.s.flags,
"IORING_CQ_???");
if (u.s.resv1)
printf(", resv1=%#x", u.s.resv1);
if (params->cq_off.resv[1])
printf(", resv2=%#llx",
(unsigned long long)
params->cq_off.resv[1]);
# endif
printf("}}) = %ld<anon_inode:[io_uring]>\n", rc);
}
}
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("HAVE_LINUX_IO_URING_H && __NR_io_uring_setup")
#endif
|
