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liburing
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test/sigfd-deadlock.c
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David Disseldorp
test/sigfd-deadlock: skip test if poll returns -EOPNOTSUPP
27 сен 2022, 21:02
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27 сен 2022, 21:02
29ad0c8
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/* SPDX-License-Identifier: MIT */ /* * Description: test that sigfd reading/polling works. A regression test for * the upstream commit: * * fd7d6de22414 ("io_uring: don't recurse on tsk->sighand->siglock with signalfd") */ #include <unistd.h> #include <sys/signalfd.h> #include <sys/epoll.h> #include <poll.h> #include <stdio.h> #include "liburing.h" #include "helpers.h" static int setup_signal(void) { sigset_t mask; int sfd; sigemptyset(&mask); sigaddset(&mask, SIGINT); sigprocmask(SIG_BLOCK, &mask, NULL); sfd = signalfd(-1, &mask, SFD_NONBLOCK); if (sfd < 0) perror("signalfd"); return sfd; } static int test_uring(int sfd) { struct io_uring_sqe *sqe; struct io_uring_cqe *cqe; struct io_uring ring; int ret; ret = io_uring_queue_init(32, &ring, 0); if (ret) return T_EXIT_FAIL; sqe = io_uring_get_sqe(&ring); io_uring_prep_poll_add(sqe, sfd, POLLIN); ret = io_uring_submit(&ring); if (ret < 0) { ret = T_EXIT_FAIL; goto err_exit; } kill(getpid(), SIGINT); io_uring_wait_cqe(&ring, &cqe); if (cqe->res == -EOPNOTSUPP) { fprintf(stderr, "signalfd poll not supported\n"); ret = T_EXIT_SKIP; } else if (cqe->res < 0) { fprintf(stderr, "poll failed: %d\n", cqe->res); ret = T_EXIT_FAIL; } else if (cqe->res & POLLIN) { ret = T_EXIT_PASS; } else { fprintf(stderr, "Unexpected poll mask %x\n", cqe->res); ret = T_EXIT_FAIL; } io_uring_cqe_seen(&ring, cqe); err_exit: io_uring_queue_exit(&ring); return ret; } int main(int argc, char *argv[]) { int sfd, ret; if (argc > 1) return T_EXIT_PASS; sfd = setup_signal(); if (sfd < 0) return T_EXIT_FAIL; ret = test_uring(sfd); if (ret == T_EXIT_FAIL) fprintf(stderr, "test_uring signalfd failed\n"); close(sfd); return ret; }