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Differential D19357 Diff 55001 sys/dev/virtio/network/if_vtnet.c

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sys/dev/virtio/network/if_vtnet.c

Show First 20 Lines • Show All 46 Lines • ▼ Show 20 Lines
#include <sys/mutex.h> #include <sys/mutex.h>
#include <sys/taskqueue.h> #include <sys/taskqueue.h>
#include <sys/smp.h> #include <sys/smp.h>
#include <machine/smp.h> #include <machine/smp.h>
#include <vm/uma.h> #include <vm/uma.h>
#include <net/ethernet.h> #include <net/ethernet.h>
#include <net/pfil.h>
#include <net/if.h> #include <net/if.h>
#include <net/if_var.h> #include <net/if_var.h>
#include <net/if_arp.h> #include <net/if_arp.h>
#include <net/if_dl.h> #include <net/if_dl.h>
#include <net/if_types.h> #include <net/if_types.h>
#include <net/if_media.h> #include <net/if_media.h>
#include <net/if_vlan_var.h> #include <net/if_vlan_var.h>
▲ Show 20 Lines • Show All 859 Lines • ▼ Show 20 Linesvtnet_alloc_virtqueues(struct vtnet_softc *sc)
return (error); return (error);
} }
static int static int
vtnet_setup_interface(struct vtnet_softc *sc) vtnet_setup_interface(struct vtnet_softc *sc)
{ {
device_t dev; device_t dev;
struct pfil_head_args pa;
struct ifnet *ifp; struct ifnet *ifp;
dev = sc->vtnet_dev; dev = sc->vtnet_dev;
ifp = sc->vtnet_ifp = if_alloc(IFT_ETHER); ifp = sc->vtnet_ifp = if_alloc(IFT_ETHER);
if (ifp == NULL) { if (ifp == NULL) {
device_printf(dev, "cannot allocate ifnet structure\n"); device_printf(dev, "cannot allocate ifnet structure\n");
return (ENOSPC); return (ENOSPC);
▲ Show 20 Lines • Show All 87 Lines • ▼ Show 20 Lines sc->vtnet_vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig,
vtnet_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); vtnet_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST);
} }
vtnet_set_rx_process_limit(sc); vtnet_set_rx_process_limit(sc);
vtnet_set_tx_intr_threshold(sc); vtnet_set_tx_intr_threshold(sc);
NETDUMP_SET(ifp, vtnet); NETDUMP_SET(ifp, vtnet);
pa.pa_version = PFIL_VERSION;
pa.pa_flags = PFIL_IN;
pa.pa_type = PFIL_TYPE_ETHERNET;
pa.pa_headname = ifp->if_xname;
sc->vtnet_pfil = pfil_head_register(&pa);
return (0); return (0);
} }
static int static int
vtnet_change_mtu(struct vtnet_softc *sc, int new_mtu) vtnet_change_mtu(struct vtnet_softc *sc, int new_mtu)
{ {
struct ifnet *ifp; struct ifnet *ifp;
int frame_size, clsize; int frame_size, clsize;
▲ Show 20 Lines • Show All 727 Lines • ▼ Show 20 Lines
static int static int
vtnet_rxq_eof(struct vtnet_rxq *rxq) vtnet_rxq_eof(struct vtnet_rxq *rxq)
{ {
struct virtio_net_hdr lhdr, *hdr; struct virtio_net_hdr lhdr, *hdr;
struct vtnet_softc *sc; struct vtnet_softc *sc;
struct ifnet *ifp; struct ifnet *ifp;
struct virtqueue *vq; struct virtqueue *vq;
struct mbuf *m; struct mbuf *m, *mr;
struct virtio_net_hdr_mrg_rxbuf *mhdr; struct virtio_net_hdr_mrg_rxbuf *mhdr;
int len, deq, nbufs, adjsz, count; int len, deq, nbufs, adjsz, count;
pfil_return_t pfil;
bool pfil_done;
sc = rxq->vtnrx_sc; sc = rxq->vtnrx_sc;
vq = rxq->vtnrx_vq; vq = rxq->vtnrx_vq;
ifp = sc->vtnet_ifp; ifp = sc->vtnet_ifp;
hdr = &lhdr; hdr = &lhdr;
deq = 0; deq = 0;
count = sc->vtnet_rx_process_limit; count = sc->vtnet_rx_process_limit;
Show All 20 Lines if ((sc->vtnet_flags & VTNET_FLAG_MRG_RXBUFS) == 0) {
*/ */
len += VTNET_RX_HEADER_PAD; len += VTNET_RX_HEADER_PAD;
} else { } else {
mhdr = mtod(m, struct virtio_net_hdr_mrg_rxbuf *); mhdr = mtod(m, struct virtio_net_hdr_mrg_rxbuf *);
nbufs = mhdr->num_buffers; nbufs = mhdr->num_buffers;
adjsz = sizeof(struct virtio_net_hdr_mrg_rxbuf); adjsz = sizeof(struct virtio_net_hdr_mrg_rxbuf);
} }
/*
* If we have enough data in first mbuf, run it through
* pfil before we allocated any new one.
*/
if (PFIL_HOOKED_IN(sc->vtnet_pfil) &&
len - adjsz >= ETHER_HDR_LEN + max_protohdr) {
pfil = pfil_run_hooks(sc->vtnet_pfil,
m->m_data + adjsz, ifp,
len - adjsz | PFIL_MEMPTR | PFIL_IN, NULL);
switch (pfil) {
case PFIL_REALLOCED:
mr = pfil_mem2mbuf(m->m_data + adjsz);
vtnet_rxq_input(rxq, mr, hdr);
aeUnsubmitted
Done
Inline Actions

Is it safe to call vtnet_rxq_discard_buf() just after if_input()?

ae: Is it safe to call vtnet_rxq_discard_buf() just after if_input()?
glebiusAuthorUnsubmitted
Done
Inline Actions

This part of patch has changed. I will update pull request soon.

glebius: This part of patch has changed. I will update pull request soon.
continue;
case PFIL_DROPPED:
case PFIL_CONSUMED:
vtnet_rxq_discard_buf(rxq, m);
continue;
default:
KASSERT(pfil == PFIL_PASS,
("Filter returned %d!\n", pfil));
};
pfil_done = true;
} else
pfil_done = false;
if (vtnet_rxq_replace_buf(rxq, m, len) != 0) { if (vtnet_rxq_replace_buf(rxq, m, len) != 0) {
rxq->vtnrx_stats.vrxs_iqdrops++; rxq->vtnrx_stats.vrxs_iqdrops++;
vtnet_rxq_discard_buf(rxq, m); vtnet_rxq_discard_buf(rxq, m);
if (nbufs > 1) if (nbufs > 1)
vtnet_rxq_discard_merged_bufs(rxq, nbufs); vtnet_rxq_discard_merged_bufs(rxq, nbufs);
continue; continue;
} }
Show All 13 Lines while (count-- > 0) {
* mbuf data. We no longer need num_buffers, so always use a * mbuf data. We no longer need num_buffers, so always use a
* regular header. * regular header.
* *
* BMV: Is this memcpy() expensive? We know the mbuf data is * BMV: Is this memcpy() expensive? We know the mbuf data is
* still valid even after the m_adj(). * still valid even after the m_adj().
*/ */
memcpy(hdr, mtod(m, void *), sizeof(struct virtio_net_hdr)); memcpy(hdr, mtod(m, void *), sizeof(struct virtio_net_hdr));
m_adj(m, adjsz); m_adj(m, adjsz);
if (PFIL_HOOKED_IN(sc->vtnet_pfil) && pfil_done == false) {
pfil = pfil_run_hooks(sc->vtnet_pfil, &m, ifp, PFIL_IN,
NULL);
switch (pfil) {
case PFIL_DROPPED:
case PFIL_CONSUMED:
continue;
default:
KASSERT(pfil == PFIL_PASS,
("Filter returned %d!\n", pfil));
}
}
vtnet_rxq_input(rxq, m, hdr); vtnet_rxq_input(rxq, m, hdr);
/* Must recheck after dropping the Rx lock. */ /* Must recheck after dropping the Rx lock. */
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
break; break;
} }
▲ Show 20 Lines • Show All 2,199 Lines • Show Last 20 Lines