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liburing-2.7
test/socket-getsetsock-cmd.c
346 строк
7 KB
Pavel Begunkov
tests/sockopt: {g,s}etsockopt with io-wq
24 июл 2024, 16:57
24 июл 2024, 16:57
3d152a3
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/* SPDX-License-Identifier: MIT */ /* * Description: Check that {g,s}etsockopt CMD operations on sockets are * consistent. * * The tests basically do the same socket operation using regular system calls * and io_uring commands, and then compare the results. */ #include <stdio.h> #include <assert.h> #include <string.h> #include <unistd.h> #include <linux/tcp.h> #include "liburing.h" #include "helpers.h" #define USERDATA 0xff42ff #define MSG "foobarbaz" static int no_sock_opt; struct fds { int tx; int rx; }; static struct fds create_sockets(void) { struct fds retval; int fd[2]; t_create_socket_pair(fd, true); retval.tx = fd[0]; retval.rx = fd[1]; return retval; } static struct io_uring create_ring(void) { struct io_uring ring; int ring_flags = 0; int err; err = io_uring_queue_init(32, &ring, ring_flags); assert(err == 0); return ring; } static int submit_cmd_sqe(struct io_uring *ring, int32_t fd, int op, int level, int optname, void *optval, int optlen, bool async) { struct io_uring_sqe *sqe; int err; assert(fd > 0); sqe = io_uring_get_sqe(ring); assert(sqe != NULL); io_uring_prep_cmd_sock(sqe, op, fd, level, optname, optval, optlen); sqe->user_data = USERDATA; if (async) sqe->flags |= IOSQE_ASYNC; /* Submitting SQE */ err = io_uring_submit_and_wait(ring, 1); if (err != 1) fprintf(stderr, "Failure: io_uring_submit_and_wait returned %d\n", err); return err; } static int receive_cqe(struct io_uring *ring) { struct io_uring_cqe *cqe; int err; err = io_uring_wait_cqe(ring, &cqe); assert(err == 0); assert(cqe->user_data == USERDATA); io_uring_cqe_seen(ring, cqe); /* Return the result of the operation */ return cqe->res; } /* * Run getsock operation using SO_RCVBUF using io_uring cmd operation and * getsockopt(2) and compare the results. */ static int run_get_rcvbuf(struct io_uring *ring, struct fds *sockfds, bool async) { int sval, uval, ulen, err; unsigned int slen; /* System call values */ slen = sizeof(sval); /* io_uring values */ ulen = sizeof(uval); /* get through io_uring cmd */ err = submit_cmd_sqe(ring, sockfds->rx, SOCKET_URING_OP_GETSOCKOPT, SOL_SOCKET, SO_RCVBUF, &uval, ulen, async); assert(err == 1); /* Wait for the CQE */ err = receive_cqe(ring); if (err == -EOPNOTSUPP) return T_EXIT_SKIP; if (err < 0) { fprintf(stderr, "Error received. %d\n", err); return T_EXIT_FAIL; } /* The output of CQE->res contains the length */ ulen = err; /* Executes the same operation using system call */ err = getsockopt(sockfds->rx, SOL_SOCKET, SO_RCVBUF, &sval, &slen); assert(err == 0); /* Make sure that io_uring operation returns the same value as the systemcall */ assert(ulen == slen); assert(uval == sval); return T_EXIT_PASS; } /* * Run getsock operation using SO_PEERNAME using io_uring cmd operation * and getsockopt(2) and compare the results. */ static int run_get_peername(struct io_uring *ring, struct fds *sockfds, bool async) { struct sockaddr sval, uval = {}; socklen_t slen = sizeof(sval); socklen_t ulen = sizeof(uval); int err; /* Get values from the systemcall */ err = getsockopt(sockfds->tx, SOL_SOCKET, SO_PEERNAME, &sval, &slen); assert(err == 0); /* Getting SO_PEERNAME */ err = submit_cmd_sqe(ring, sockfds->rx, SOCKET_URING_OP_GETSOCKOPT, SOL_SOCKET, SO_PEERNAME, &uval, ulen, async); assert(err == 1); /* Wait for the CQE */ err = receive_cqe(ring); if (err == -EOPNOTSUPP || err == -EINVAL) { no_sock_opt = 1; return T_EXIT_SKIP; } if (err < 0) { fprintf(stderr, "%s: Error in the CQE: %d\n", __func__, err); return T_EXIT_FAIL; } /* The length comes from cqe->res, which is returned from receive_cqe() */ ulen = err; /* Make sure that io_uring operation returns the same values as the systemcall */ assert(sval.sa_family == uval.sa_family); assert(slen == ulen); return T_EXIT_PASS; } /* * Run getsockopt tests. Basically comparing io_uring output and systemcall results */ static int run_getsockopt_test(struct io_uring *ring, struct fds *sockfds) { int err; err = run_get_peername(ring, sockfds, false); if (err) return err; err = run_get_peername(ring, sockfds, true); if (err) return err; err = run_get_rcvbuf(ring, sockfds, false); if (err) return err; return run_get_rcvbuf(ring, sockfds, true); } /* * Given a `val` value, set it in SO_REUSEPORT using io_uring cmd, and read using * getsockopt(2), and make sure they match. */ static int run_setsockopt_reuseport(struct io_uring *ring, struct fds *sockfds, int val, bool async) { unsigned int slen, ulen; int sval, uval = val; int err; slen = sizeof(sval); ulen = sizeof(uval); /* Setting SO_REUSEPORT */ err = submit_cmd_sqe(ring, sockfds->rx, SOCKET_URING_OP_SETSOCKOPT, SOL_SOCKET, SO_REUSEPORT, &uval, ulen, async); assert(err == 1); err = receive_cqe(ring); if (err == -EOPNOTSUPP) return T_EXIT_SKIP; /* Get values from the systemcall */ err = getsockopt(sockfds->rx, SOL_SOCKET, SO_REUSEPORT, &sval, &slen); assert(err == 0); /* Make sure the set using io_uring cmd matches what systemcall returns */ assert(uval == sval); assert(ulen == slen); return T_EXIT_PASS; } /* * Given a `val` value, set the TCP_USER_TIMEOUT using io_uring and read using * getsockopt(2). Make sure they match */ static int run_setsockopt_usertimeout(struct io_uring *ring, struct fds *sockfds, int val, bool async) { int optname = TCP_USER_TIMEOUT; int level = IPPROTO_TCP; unsigned int slen, ulen; int sval, uval, err; slen = sizeof(uval); ulen = sizeof(uval); uval = val; /* Setting timeout */ err = submit_cmd_sqe(ring, sockfds->rx, SOCKET_URING_OP_SETSOCKOPT, level, optname, &uval, ulen, async); assert(err == 1); err = receive_cqe(ring); if (err == -EOPNOTSUPP) return T_EXIT_SKIP; if (err < 0) { fprintf(stderr, "%s: Got an error: %d\n", __func__, err); return T_EXIT_FAIL; } /* Get the value from the systemcall, to make sure it was set */ err = getsockopt(sockfds->rx, level, optname, &sval, &slen); assert(err == 0); assert(uval == sval); return T_EXIT_PASS; } /* Test setsockopt() for SOL_SOCKET */ static int run_setsockopt_test(struct io_uring *ring, struct fds *sockfds) { int err, i; int j; for (j = 0; j < 2; j++) { bool async = j & 1; for (i = 0; i <= 1; i++) { err = run_setsockopt_reuseport(ring, sockfds, i, async); if (err) return err; } for (i = 1; i <= 10; i++) { err = run_setsockopt_usertimeout(ring, sockfds, i, async); if (err) return err; } } return err; } /* Send data through the sockets */ static void send_data(struct fds *s) { int written_bytes; /* Send data sing the sockstruct->send */ written_bytes = write(s->tx, MSG, strlen(MSG)); assert(written_bytes == strlen(MSG)); } int main(int argc, char *argv[]) { struct fds sockfds; struct io_uring ring; int err; if (argc > 1) return T_EXIT_SKIP; /* Simply io_uring ring creation */ ring = create_ring(); /* Create sockets */ sockfds = create_sockets(); send_data(&sockfds); err = run_getsockopt_test(&ring, &sockfds); if (err) { if (err == T_EXIT_SKIP) { fprintf(stderr, "Skipping tests.\n"); return T_EXIT_SKIP; } fprintf(stderr, "Failed to run test: %d\n", err); return err; } if (no_sock_opt) return T_EXIT_SKIP; err = run_setsockopt_test(&ring, &sockfds); if (err) { if (err == T_EXIT_SKIP) { fprintf(stderr, "Skipping tests.\n"); return T_EXIT_SKIP; } fprintf(stderr, "Failed to run test: %d\n", err); return err; } io_uring_queue_exit(&ring); return err; }