diff options
Diffstat (limited to 'kernel/tools/testing/selftests/ipc/msgque.c')
| -rw-r--r-- | kernel/tools/testing/selftests/ipc/msgque.c | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/kernel/tools/testing/selftests/ipc/msgque.c b/kernel/tools/testing/selftests/ipc/msgque.c new file mode 100644 index 000000000..1b2ce334b --- /dev/null +++ b/kernel/tools/testing/selftests/ipc/msgque.c @@ -0,0 +1,254 @@ +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <errno.h> +#include <linux/msg.h> +#include <fcntl.h> + +#include "../kselftest.h" + +#define MAX_MSG_SIZE 32 + +struct msg1 { + int msize; + long mtype; + char mtext[MAX_MSG_SIZE]; +}; + +#define TEST_STRING "Test sysv5 msg" +#define MSG_TYPE 1 + +#define ANOTHER_TEST_STRING "Yet another test sysv5 msg" +#define ANOTHER_MSG_TYPE 26538 + +struct msgque_data { + key_t key; + int msq_id; + int qbytes; + int qnum; + int mode; + struct msg1 *messages; +}; + +int restore_queue(struct msgque_data *msgque) +{ + int fd, ret, id, i; + char buf[32]; + + fd = open("/proc/sys/kernel/msg_next_id", O_WRONLY); + if (fd == -1) { + printf("Failed to open /proc/sys/kernel/msg_next_id\n"); + return -errno; + } + sprintf(buf, "%d", msgque->msq_id); + + ret = write(fd, buf, strlen(buf)); + if (ret != strlen(buf)) { + printf("Failed to write to /proc/sys/kernel/msg_next_id\n"); + return -errno; + } + + id = msgget(msgque->key, msgque->mode | IPC_CREAT | IPC_EXCL); + if (id == -1) { + printf("Failed to create queue\n"); + return -errno; + } + + if (id != msgque->msq_id) { + printf("Restored queue has wrong id (%d instead of %d)\n", + id, msgque->msq_id); + ret = -EFAULT; + goto destroy; + } + + for (i = 0; i < msgque->qnum; i++) { + if (msgsnd(msgque->msq_id, &msgque->messages[i].mtype, + msgque->messages[i].msize, IPC_NOWAIT) != 0) { + printf("msgsnd failed (%m)\n"); + ret = -errno; + goto destroy; + }; + } + return 0; + +destroy: + if (msgctl(id, IPC_RMID, 0)) + printf("Failed to destroy queue: %d\n", -errno); + return ret; +} + +int check_and_destroy_queue(struct msgque_data *msgque) +{ + struct msg1 message; + int cnt = 0, ret; + + while (1) { + ret = msgrcv(msgque->msq_id, &message.mtype, MAX_MSG_SIZE, + 0, IPC_NOWAIT); + if (ret < 0) { + if (errno == ENOMSG) + break; + printf("Failed to read IPC message: %m\n"); + ret = -errno; + goto err; + } + if (ret != msgque->messages[cnt].msize) { + printf("Wrong message size: %d (expected %d)\n", ret, + msgque->messages[cnt].msize); + ret = -EINVAL; + goto err; + } + if (message.mtype != msgque->messages[cnt].mtype) { + printf("Wrong message type\n"); + ret = -EINVAL; + goto err; + } + if (memcmp(message.mtext, msgque->messages[cnt].mtext, ret)) { + printf("Wrong message content\n"); + ret = -EINVAL; + goto err; + } + cnt++; + } + + if (cnt != msgque->qnum) { + printf("Wrong message number\n"); + ret = -EINVAL; + goto err; + } + + ret = 0; +err: + if (msgctl(msgque->msq_id, IPC_RMID, 0)) { + printf("Failed to destroy queue: %d\n", -errno); + return -errno; + } + return ret; +} + +int dump_queue(struct msgque_data *msgque) +{ + struct msqid64_ds ds; + int kern_id; + int i, ret; + + for (kern_id = 0; kern_id < 256; kern_id++) { + ret = msgctl(kern_id, MSG_STAT, &ds); + if (ret < 0) { + if (errno == -EINVAL) + continue; + printf("Failed to get stats for IPC queue with id %d\n", + kern_id); + return -errno; + } + + if (ret == msgque->msq_id) + break; + } + + msgque->messages = malloc(sizeof(struct msg1) * ds.msg_qnum); + if (msgque->messages == NULL) { + printf("Failed to get stats for IPC queue\n"); + return -ENOMEM; + } + + msgque->qnum = ds.msg_qnum; + msgque->mode = ds.msg_perm.mode; + msgque->qbytes = ds.msg_qbytes; + + for (i = 0; i < msgque->qnum; i++) { + ret = msgrcv(msgque->msq_id, &msgque->messages[i].mtype, + MAX_MSG_SIZE, i, IPC_NOWAIT | MSG_COPY); + if (ret < 0) { + printf("Failed to copy IPC message: %m (%d)\n", errno); + return -errno; + } + msgque->messages[i].msize = ret; + } + return 0; +} + +int fill_msgque(struct msgque_data *msgque) +{ + struct msg1 msgbuf; + + msgbuf.mtype = MSG_TYPE; + memcpy(msgbuf.mtext, TEST_STRING, sizeof(TEST_STRING)); + if (msgsnd(msgque->msq_id, &msgbuf.mtype, sizeof(TEST_STRING), + IPC_NOWAIT) != 0) { + printf("First message send failed (%m)\n"); + return -errno; + }; + + msgbuf.mtype = ANOTHER_MSG_TYPE; + memcpy(msgbuf.mtext, ANOTHER_TEST_STRING, sizeof(ANOTHER_TEST_STRING)); + if (msgsnd(msgque->msq_id, &msgbuf.mtype, sizeof(ANOTHER_TEST_STRING), + IPC_NOWAIT) != 0) { + printf("Second message send failed (%m)\n"); + return -errno; + }; + return 0; +} + +int main(int argc, char **argv) +{ + int msg, pid, err; + struct msgque_data msgque; + + if (getuid() != 0) { + printf("Please run the test as root - Exiting.\n"); + return ksft_exit_fail(); + } + + msgque.key = ftok(argv[0], 822155650); + if (msgque.key == -1) { + printf("Can't make key: %d\n", -errno); + return ksft_exit_fail(); + } + + msgque.msq_id = msgget(msgque.key, IPC_CREAT | IPC_EXCL | 0666); + if (msgque.msq_id == -1) { + err = -errno; + printf("Can't create queue: %d\n", err); + goto err_out; + } + + err = fill_msgque(&msgque); + if (err) { + printf("Failed to fill queue: %d\n", err); + goto err_destroy; + } + + err = dump_queue(&msgque); + if (err) { + printf("Failed to dump queue: %d\n", err); + goto err_destroy; + } + + err = check_and_destroy_queue(&msgque); + if (err) { + printf("Failed to check and destroy queue: %d\n", err); + goto err_out; + } + + err = restore_queue(&msgque); + if (err) { + printf("Failed to restore queue: %d\n", err); + goto err_destroy; + } + + err = check_and_destroy_queue(&msgque); + if (err) { + printf("Failed to test queue: %d\n", err); + goto err_out; + } + return ksft_exit_pass(); + +err_destroy: + if (msgctl(msgque.msq_id, IPC_RMID, 0)) { + printf("Failed to destroy queue: %d\n", -errno); + return ksft_exit_fail(); + } +err_out: + return ksft_exit_fail(); +} |