コード例 #1
0
ファイル: core.c プロジェクト: PKUCloud/qemu-1.2.2-replay
void usb_packet_skip(USBPacket *p, size_t bytes)
{
    assert(p->result >= 0);
    assert(p->result + bytes <= p->iov.size);
    if (p->pid == USB_TOKEN_IN) {
        iov_memset(p->iov.iov, p->iov.niov, p->result, 0, bytes);
    }
    p->result += bytes;
}
コード例 #2
0
ファイル: rbd.c プロジェクト: nikunjad/qemu
static void qemu_rbd_memset(RADOSCB *rcb, int64_t offs)
{
    if (LIBRBD_USE_IOVEC) {
        RBDAIOCB *acb = rcb->acb;
        iov_memset(acb->qiov->iov, acb->qiov->niov, offs, 0,
                   acb->qiov->size - offs);
    } else {
        memset(rcb->buf + offs, 0, rcb->size - offs);
    }
}
コード例 #3
0
ファイル: raw-posix.c プロジェクト: 01org/KVMGT-qemu
static int aio_worker(void *arg)
{
    RawPosixAIOData *aiocb = arg;
    ssize_t ret = 0;

    switch (aiocb->aio_type & QEMU_AIO_TYPE_MASK) {
    case QEMU_AIO_READ:
        ret = handle_aiocb_rw(aiocb);
        if (ret >= 0 && ret < aiocb->aio_nbytes && aiocb->bs->growable) {
            iov_memset(aiocb->aio_iov, aiocb->aio_niov, ret,
                      0, aiocb->aio_nbytes - ret);

            ret = aiocb->aio_nbytes;
        }
        if (ret == aiocb->aio_nbytes) {
            ret = 0;
        } else if (ret >= 0 && ret < aiocb->aio_nbytes) {
            ret = -EINVAL;
        }
        break;
    case QEMU_AIO_WRITE:
        ret = handle_aiocb_rw(aiocb);
        if (ret == aiocb->aio_nbytes) {
            ret = 0;
        } else if (ret >= 0 && ret < aiocb->aio_nbytes) {
            ret = -EINVAL;
        }
        break;
    case QEMU_AIO_FLUSH:
        ret = handle_aiocb_flush(aiocb);
        break;
    case QEMU_AIO_IOCTL:
        ret = handle_aiocb_ioctl(aiocb);
        break;
    case QEMU_AIO_DISCARD:
        ret = handle_aiocb_discard(aiocb);
        break;
    default:
        fprintf(stderr, "invalid aio request (0x%x)\n", aiocb->aio_type);
        ret = -EINVAL;
        break;
    }

    g_slice_free(RawPosixAIOData, aiocb);
    return ret;
}
コード例 #4
0
ファイル: iov.c プロジェクト: Flyalay/kernel-qemu-pci
size_t qemu_iovec_memset(QEMUIOVector *qiov, size_t offset,
                         int fillc, size_t bytes)
{
    return iov_memset(qiov->iov, qiov->niov, offset, fillc, bytes);
}
コード例 #5
0
ファイル: test-iov.c プロジェクト: GamerSource/qemu
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);
}
コード例 #6
0
ファイル: test-iov.c プロジェクト: GamerSource/qemu
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
}