diff options
author | aliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162> | 2008-12-17 19:17:17 +0000 |
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committer | aliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162> | 2008-12-17 19:17:17 +0000 |
commit | b535b7b2f73803146fcd442c7df8f90d48b1967f (patch) | |
tree | b79d38de7008a1779103bda8133698a600251711 | |
parent | fbe78f4f55c6fdf1f8df3d82bf31835de9283fa3 (diff) |
Add support for tap vectored send
This is adapted from kvm-userspace. It allows readv to be used with tap when
the host supports it.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6074 c046a42c-6fe2-441c-8c8c-71466251a162
-rw-r--r-- | net.c | 18 |
1 files changed, 18 insertions, 0 deletions
@@ -620,6 +620,21 @@ typedef struct TAPState { char down_script[1024]; } TAPState; +#ifdef HAVE_IOVEC +static ssize_t tap_receive_iov(void *opaque, const struct iovec *iov, + int iovcnt) +{ + TAPState *s = opaque; + ssize_t len; + + do { + len = writev(s->fd, iov, iovcnt); + } while (len == -1 && (errno == EINTR || errno == EAGAIN)); + + return len; +} +#endif + static void tap_receive(void *opaque, const uint8_t *buf, int size) { TAPState *s = opaque; @@ -664,6 +679,9 @@ static TAPState *net_tap_fd_init(VLANState *vlan, int fd) return NULL; s->fd = fd; s->vc = qemu_new_vlan_client(vlan, tap_receive, NULL, s); +#ifdef HAVE_IOVEC + s->vc->fd_readv = tap_receive_iov; +#endif qemu_set_fd_handler(s->fd, tap_send, NULL, s); snprintf(s->vc->info_str, sizeof(s->vc->info_str), "tap: fd=%d", fd); return s; |