diff options
Diffstat (limited to 'tests/test-iov.c')
| -rw-r--r-- | tests/test-iov.c | 410 |
1 files changed, 410 insertions, 0 deletions
diff --git a/tests/test-iov.c b/tests/test-iov.c new file mode 100644 index 00000000..46e4dddc --- /dev/null +++ b/tests/test-iov.c @@ -0,0 +1,410 @@ +#include <glib.h> +#include "qemu-common.h" +#include "qemu/iov.h" +#include "qemu/sockets.h" + +/* create a randomly-sized iovec with random vectors */ +static void iov_random(struct iovec **iovp, unsigned *iov_cntp) +{ + unsigned niov = g_test_rand_int_range(3,8); + struct iovec *iov = g_malloc(niov * sizeof(*iov)); + unsigned i; + for (i = 0; i < niov; ++i) { + iov[i].iov_len = g_test_rand_int_range(5,20); + iov[i].iov_base = g_malloc(iov[i].iov_len); + } + *iovp = iov; + *iov_cntp = niov; +} + +static void iov_free(struct iovec *iov, unsigned niov) +{ + unsigned i; + for (i = 0; i < niov; ++i) { + g_free(iov[i].iov_base); + } + g_free(iov); +} + +static void test_iov_bytes(struct iovec *iov, unsigned niov, + size_t offset, size_t bytes) +{ + unsigned i; + size_t j, o; + unsigned char *b; + o = 0; + + /* we walk over all elements, */ + for (i = 0; i < niov; ++i) { + b = iov[i].iov_base; + /* over each char of each element, */ + for (j = 0; j < iov[i].iov_len; ++j) { + /* counting each of them and + * verifying that the ones within [offset,offset+bytes) + * range are equal to the position number (o) */ + if (o >= offset && o < offset + bytes) { + g_assert(b[j] == (o & 255)); + } else { + g_assert(b[j] == 0xff); + } + ++o; + } + } +} + +static void test_to_from_buf_1(void) +{ + unsigned niov; + struct iovec *iov; + size_t sz; + unsigned char *ibuf, *obuf; + unsigned i, j, n; + + iov_random(&iov, &niov); + + sz = iov_size(iov, niov); + + ibuf = g_malloc(sz + 8) + 4; + memcpy(ibuf-4, "aaaa", 4); memcpy(ibuf + sz, "bbbb", 4); + obuf = g_malloc(sz + 8) + 4; + memcpy(obuf-4, "xxxx", 4); memcpy(obuf + sz, "yyyy", 4); + + /* fill in ibuf with 0123456... */ + for (i = 0; i < sz; ++i) { + ibuf[i] = i & 255; + } + + for (i = 0; i <= sz; ++i) { + + /* Test from/to buf for offset(i) in [0..sz] up to the end of buffer. + * For last iteration with offset == sz, the procedure should + * skip whole vector and process exactly 0 bytes */ + + /* first set bytes [i..sz) to some "random" value */ + n = iov_memset(iov, niov, 0, 0xff, -1); + g_assert(n == sz); + + /* next copy bytes [i..sz) from ibuf to iovec */ + n = iov_from_buf(iov, niov, i, ibuf + i, -1); + g_assert(n == sz - i); + + /* clear part of obuf */ + memset(obuf + i, 0, sz - i); + /* and set this part of obuf to values from iovec */ + n = iov_to_buf(iov, niov, i, obuf + i, -1); + g_assert(n == sz - i); + + /* now compare resulting buffers */ + g_assert(memcmp(ibuf, obuf, sz) == 0); + + /* test just one char */ + n = iov_to_buf(iov, niov, i, obuf + i, 1); + g_assert(n == (i < sz)); + if (n) { + g_assert(obuf[i] == (i & 255)); + } + + for (j = i; j <= sz; ++j) { + /* now test num of bytes cap up to byte no. j, + * with j in [i..sz]. */ + + /* clear iovec */ + n = iov_memset(iov, niov, 0, 0xff, -1); + g_assert(n == sz); + + /* copy bytes [i..j) from ibuf to iovec */ + n = iov_from_buf(iov, niov, i, ibuf + i, j - i); + g_assert(n == j - i); + + /* clear part of obuf */ + memset(obuf + i, 0, j - i); + + /* copy bytes [i..j) from iovec to obuf */ + n = iov_to_buf(iov, niov, i, obuf + i, j - i); + g_assert(n == j - i); + + /* verify result */ + g_assert(memcmp(ibuf, obuf, sz) == 0); + + /* now actually check if the iovec contains the right data */ + test_iov_bytes(iov, niov, i, j - i); + } + } + g_assert(!memcmp(ibuf-4, "aaaa", 4) && !memcmp(ibuf+sz, "bbbb", 4)); + g_free(ibuf-4); + g_assert(!memcmp(obuf-4, "xxxx", 4) && !memcmp(obuf+sz, "yyyy", 4)); + g_free(obuf-4); + iov_free(iov, niov); +} + +static void test_to_from_buf(void) +{ + int x; + for (x = 0; x < 4; ++x) { + test_to_from_buf_1(); + } +} + +static void test_io(void) +{ +#ifndef _WIN32 +/* socketpair(PF_UNIX) which does not exist on windows */ + + int sv[2]; + int r; + unsigned i, j, k, s, t; + fd_set fds; + unsigned niov; + struct iovec *iov, *siov; + unsigned char *buf; + size_t sz; + + iov_random(&iov, &niov); + sz = iov_size(iov, niov); + buf = g_malloc(sz); + for (i = 0; i < sz; ++i) { + buf[i] = i & 255; + } + iov_from_buf(iov, niov, 0, buf, sz); + + siov = g_malloc(sizeof(*iov) * niov); + memcpy(siov, iov, sizeof(*iov) * niov); + + if (socketpair(PF_UNIX, SOCK_STREAM, 0, sv) < 0) { + perror("socketpair"); + exit(1); + } + + FD_ZERO(&fds); + + t = 0; + if (fork() == 0) { + /* writer */ + + close(sv[0]); + FD_SET(sv[1], &fds); + fcntl(sv[1], F_SETFL, O_RDWR|O_NONBLOCK); + r = g_test_rand_int_range(sz / 2, sz); + setsockopt(sv[1], SOL_SOCKET, SO_SNDBUF, &r, sizeof(r)); + + for (i = 0; i <= sz; ++i) { + for (j = i; j <= sz; ++j) { + k = i; + do { + s = g_test_rand_int_range(0, j - k + 1); + r = iov_send(sv[1], iov, niov, k, s); + g_assert(memcmp(iov, siov, sizeof(*iov)*niov) == 0); + if (r >= 0) { + k += r; + t += r; + usleep(g_test_rand_int_range(0, 30)); + } else if (errno == EAGAIN) { + select(sv[1]+1, NULL, &fds, NULL, NULL); + continue; + } else { + perror("send"); + exit(1); + } + } while(k < j); + } + } + exit(0); + + } else { + /* reader & verifier */ + + close(sv[1]); + FD_SET(sv[0], &fds); + fcntl(sv[0], F_SETFL, O_RDWR|O_NONBLOCK); + r = g_test_rand_int_range(sz / 2, sz); + setsockopt(sv[0], SOL_SOCKET, SO_RCVBUF, &r, sizeof(r)); + usleep(500000); + + for (i = 0; i <= sz; ++i) { + for (j = i; j <= sz; ++j) { + k = i; + iov_memset(iov, niov, 0, 0xff, -1); + do { + s = g_test_rand_int_range(0, j - k + 1); + r = iov_recv(sv[0], iov, niov, k, s); + g_assert(memcmp(iov, siov, sizeof(*iov)*niov) == 0); + if (r > 0) { + k += r; + t += r; + } else if (!r) { + if (s) { + break; + } + } else if (errno == EAGAIN) { + select(sv[0]+1, &fds, NULL, NULL, NULL); + continue; + } else { + perror("recv"); + exit(1); + } + } while(k < j); + test_iov_bytes(iov, niov, i, j - i); + } + } + } +#endif +} + +static void test_discard_front(void) +{ + struct iovec *iov; + struct iovec *iov_tmp; + unsigned int iov_cnt; + unsigned int iov_cnt_tmp; + void *old_base; + size_t size; + size_t ret; + + /* Discard zero bytes */ + iov_random(&iov, &iov_cnt); + iov_tmp = iov; + iov_cnt_tmp = iov_cnt; + ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, 0); + g_assert(ret == 0); + g_assert(iov_tmp == iov); + g_assert(iov_cnt_tmp == iov_cnt); + iov_free(iov, iov_cnt); + + /* Discard more bytes than vector size */ + iov_random(&iov, &iov_cnt); + iov_tmp = iov; + iov_cnt_tmp = iov_cnt; + size = iov_size(iov, iov_cnt); + ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, size + 1); + g_assert(ret == size); + g_assert(iov_cnt_tmp == 0); + iov_free(iov, iov_cnt); + + /* Discard entire vector */ + iov_random(&iov, &iov_cnt); + iov_tmp = iov; + iov_cnt_tmp = iov_cnt; + size = iov_size(iov, iov_cnt); + ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, size); + g_assert(ret == size); + g_assert(iov_cnt_tmp == 0); + iov_free(iov, iov_cnt); + + /* Discard within first element */ + iov_random(&iov, &iov_cnt); + iov_tmp = iov; + iov_cnt_tmp = iov_cnt; + old_base = iov->iov_base; + size = g_test_rand_int_range(1, iov->iov_len); + ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, size); + g_assert(ret == size); + g_assert(iov_tmp == iov); + g_assert(iov_cnt_tmp == iov_cnt); + g_assert(iov_tmp->iov_base == old_base + size); + iov_tmp->iov_base = old_base; /* undo before g_free() */ + iov_free(iov, iov_cnt); + + /* Discard entire first element */ + iov_random(&iov, &iov_cnt); + iov_tmp = iov; + iov_cnt_tmp = iov_cnt; + ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, iov->iov_len); + g_assert(ret == iov->iov_len); + g_assert(iov_tmp == iov + 1); + g_assert(iov_cnt_tmp == iov_cnt - 1); + iov_free(iov, iov_cnt); + + /* Discard within second element */ + iov_random(&iov, &iov_cnt); + iov_tmp = iov; + iov_cnt_tmp = iov_cnt; + old_base = iov[1].iov_base; + size = iov->iov_len + g_test_rand_int_range(1, iov[1].iov_len); + ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, size); + g_assert(ret == size); + g_assert(iov_tmp == iov + 1); + g_assert(iov_cnt_tmp == iov_cnt - 1); + g_assert(iov_tmp->iov_base == old_base + (size - iov->iov_len)); + iov_tmp->iov_base = old_base; /* undo before g_free() */ + iov_free(iov, iov_cnt); +} + +static void test_discard_back(void) +{ + struct iovec *iov; + unsigned int iov_cnt; + unsigned int iov_cnt_tmp; + void *old_base; + size_t size; + size_t ret; + + /* Discard zero bytes */ + iov_random(&iov, &iov_cnt); + iov_cnt_tmp = iov_cnt; + ret = iov_discard_back(iov, &iov_cnt_tmp, 0); + g_assert(ret == 0); + g_assert(iov_cnt_tmp == iov_cnt); + iov_free(iov, iov_cnt); + + /* Discard more bytes than vector size */ + iov_random(&iov, &iov_cnt); + iov_cnt_tmp = iov_cnt; + size = iov_size(iov, iov_cnt); + ret = iov_discard_back(iov, &iov_cnt_tmp, size + 1); + g_assert(ret == size); + g_assert(iov_cnt_tmp == 0); + iov_free(iov, iov_cnt); + + /* Discard entire vector */ + iov_random(&iov, &iov_cnt); + iov_cnt_tmp = iov_cnt; + size = iov_size(iov, iov_cnt); + ret = iov_discard_back(iov, &iov_cnt_tmp, size); + g_assert(ret == size); + g_assert(iov_cnt_tmp == 0); + iov_free(iov, iov_cnt); + + /* Discard within last element */ + iov_random(&iov, &iov_cnt); + iov_cnt_tmp = iov_cnt; + old_base = iov[iov_cnt - 1].iov_base; + size = g_test_rand_int_range(1, iov[iov_cnt - 1].iov_len); + ret = iov_discard_back(iov, &iov_cnt_tmp, size); + g_assert(ret == size); + g_assert(iov_cnt_tmp == iov_cnt); + g_assert(iov[iov_cnt - 1].iov_base == old_base); + iov_free(iov, iov_cnt); + + /* Discard entire last element */ + iov_random(&iov, &iov_cnt); + iov_cnt_tmp = iov_cnt; + old_base = iov[iov_cnt - 1].iov_base; + size = iov[iov_cnt - 1].iov_len; + ret = iov_discard_back(iov, &iov_cnt_tmp, size); + g_assert(ret == size); + g_assert(iov_cnt_tmp == iov_cnt - 1); + iov_free(iov, iov_cnt); + + /* Discard within second-to-last element */ + iov_random(&iov, &iov_cnt); + iov_cnt_tmp = iov_cnt; + old_base = iov[iov_cnt - 2].iov_base; + size = iov[iov_cnt - 1].iov_len + + g_test_rand_int_range(1, iov[iov_cnt - 2].iov_len); + ret = iov_discard_back(iov, &iov_cnt_tmp, size); + g_assert(ret == size); + g_assert(iov_cnt_tmp == iov_cnt - 1); + g_assert(iov[iov_cnt - 2].iov_base == old_base); + iov_free(iov, iov_cnt); +} + +int main(int argc, char **argv) +{ + g_test_init(&argc, &argv, NULL); + g_test_rand_int(); + g_test_add_func("/basic/iov/from-to-buf", test_to_from_buf); + g_test_add_func("/basic/iov/io", test_io); + g_test_add_func("/basic/iov/discard-front", test_discard_front); + g_test_add_func("/basic/iov/discard-back", test_discard_back); + return g_test_run(); +} |