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https://github.com/freebsd/freebsd-src
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hyperv/hn: Fix detach error handling.
MFC after: 1 week Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D8613
This commit is contained in:
Sepherosa Ziehau
parent
f6f2e0ce38
commit
2494d735e2
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=309227
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@ -62,8 +62,8 @@ __FBSDID("$FreeBSD$");
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static int hn_nvs_conn_chim(struct hn_softc *);
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static int hn_nvs_conn_rxbuf(struct hn_softc *);
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static int hn_nvs_disconn_chim(struct hn_softc *);
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static int hn_nvs_disconn_rxbuf(struct hn_softc *);
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static void hn_nvs_disconn_chim(struct hn_softc *);
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static void hn_nvs_disconn_rxbuf(struct hn_softc *);
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static int hn_nvs_conf_ndis(struct hn_softc *, int);
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static int hn_nvs_init_ndis(struct hn_softc *);
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static int hn_nvs_doinit(struct hn_softc *, uint32_t);
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@ -308,7 +308,7 @@ hn_nvs_conn_chim(struct hn_softc *sc)
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return (error);
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}
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static int
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static void
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hn_nvs_disconn_rxbuf(struct hn_softc *sc)
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{
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int error;
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@ -328,7 +328,12 @@ hn_nvs_disconn_rxbuf(struct hn_softc *sc)
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if (error) {
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if_printf(sc->hn_ifp,
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"send nvs rxbuf disconn failed: %d\n", error);
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return (error);
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/*
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* Fine for a revoked channel, since the hypervisor
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* does not drain TX bufring for a revoked channel.
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*/
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if (!vmbus_chan_is_revoked(sc->hn_prichan))
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sc->hn_flags |= HN_FLAG_RXBUF_REF;
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}
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sc->hn_flags &= ~HN_FLAG_RXBUF_CONNECTED;
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@ -357,14 +362,13 @@ hn_nvs_disconn_rxbuf(struct hn_softc *sc)
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if (error) {
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if_printf(sc->hn_ifp,
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"rxbuf gpadl disconn failed: %d\n", error);
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return (error);
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sc->hn_flags |= HN_FLAG_RXBUF_REF;
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}
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sc->hn_rxbuf_gpadl = 0;
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}
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return (0);
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}
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static int
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static void
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hn_nvs_disconn_chim(struct hn_softc *sc)
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{
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int error;
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@ -384,7 +388,12 @@ hn_nvs_disconn_chim(struct hn_softc *sc)
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if (error) {
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if_printf(sc->hn_ifp,
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"send nvs chim disconn failed: %d\n", error);
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return (error);
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/*
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* Fine for a revoked channel, since the hypervisor
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* does not drain TX bufring for a revoked channel.
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*/
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if (!vmbus_chan_is_revoked(sc->hn_prichan))
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sc->hn_flags |= HN_FLAG_CHIM_REF;
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}
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sc->hn_flags &= ~HN_FLAG_CHIM_CONNECTED;
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@ -414,7 +423,7 @@ hn_nvs_disconn_chim(struct hn_softc *sc)
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if (error) {
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if_printf(sc->hn_ifp,
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"chim gpadl disconn failed: %d\n", error);
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return (error);
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sc->hn_flags |= HN_FLAG_CHIM_REF;
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}
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sc->hn_chim_gpadl = 0;
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}
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@ -423,7 +432,6 @@ hn_nvs_disconn_chim(struct hn_softc *sc)
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free(sc->hn_chim_bmap, M_DEVBUF);
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sc->hn_chim_bmap = NULL;
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}
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return (0);
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}
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static int
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@ -296,6 +296,7 @@ static int hn_synth_attach(struct hn_softc *, int);
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static void hn_synth_detach(struct hn_softc *);
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static int hn_synth_alloc_subchans(struct hn_softc *,
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int *);
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static bool hn_synth_attachable(const struct hn_softc *);
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static void hn_suspend(struct hn_softc *);
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static void hn_suspend_data(struct hn_softc *);
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static void hn_suspend_mgmt(struct hn_softc *);
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@ -3249,7 +3250,10 @@ hn_destroy_rx_data(struct hn_softc *sc)
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int i;
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if (sc->hn_rxbuf != NULL) {
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hyperv_dmamem_free(&sc->hn_rxbuf_dma, sc->hn_rxbuf);
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if ((sc->hn_flags & HN_FLAG_RXBUF_REF) == 0)
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hyperv_dmamem_free(&sc->hn_rxbuf_dma, sc->hn_rxbuf);
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else
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device_printf(sc->hn_dev, "RXBUF is referenced\n");
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sc->hn_rxbuf = NULL;
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}
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@ -3261,7 +3265,12 @@ hn_destroy_rx_data(struct hn_softc *sc)
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if (rxr->hn_br == NULL)
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continue;
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hyperv_dmamem_free(&rxr->hn_br_dma, rxr->hn_br);
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if ((rxr->hn_rx_flags & HN_RX_FLAG_BR_REF) == 0) {
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hyperv_dmamem_free(&rxr->hn_br_dma, rxr->hn_br);
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} else {
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device_printf(sc->hn_dev,
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"%dth channel bufring is referenced", i);
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}
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rxr->hn_br = NULL;
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#if defined(INET) || defined(INET6)
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@ -3730,7 +3739,12 @@ hn_destroy_tx_data(struct hn_softc *sc)
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int i;
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if (sc->hn_chim != NULL) {
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hyperv_dmamem_free(&sc->hn_chim_dma, sc->hn_chim);
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if ((sc->hn_flags & HN_FLAG_CHIM_REF) == 0) {
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hyperv_dmamem_free(&sc->hn_chim_dma, sc->hn_chim);
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} else {
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device_printf(sc->hn_dev,
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"chimney sending buffer is referenced");
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}
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sc->hn_chim = NULL;
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}
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@ -4214,7 +4228,7 @@ static void
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hn_chan_detach(struct hn_softc *sc, struct vmbus_channel *chan)
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{
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struct hn_rx_ring *rxr;
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int idx;
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int idx, error;
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idx = vmbus_chan_subidx(chan);
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@ -4243,7 +4257,16 @@ hn_chan_detach(struct hn_softc *sc, struct vmbus_channel *chan)
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* NOTE:
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* Channel closing does _not_ destroy the target channel.
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*/
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vmbus_chan_close(chan);
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error = vmbus_chan_close_direct(chan);
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if (error == EISCONN) {
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if_printf(sc->hn_ifp, "chan%u subidx%u "
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"bufring is connected after being closed\n",
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vmbus_chan_id(chan), vmbus_chan_subidx(chan));
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rxr->hn_rx_flags |= HN_RX_FLAG_BR_REF;
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} else if (error) {
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if_printf(sc->hn_ifp, "chan%u subidx%u close failed: %d\n",
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vmbus_chan_id(chan), vmbus_chan_subidx(chan), error);
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}
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}
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static int
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@ -4373,6 +4396,23 @@ hn_synth_alloc_subchans(struct hn_softc *sc, int *nsubch)
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return (0);
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}
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static bool
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hn_synth_attachable(const struct hn_softc *sc)
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{
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int i;
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if (sc->hn_flags & HN_FLAG_ERRORS)
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return (false);
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for (i = 0; i < sc->hn_rx_ring_cnt; ++i) {
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const struct hn_rx_ring *rxr = &sc->hn_rx_ring[i];
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if (rxr->hn_rx_flags & HN_RX_FLAG_BR_REF)
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return (false);
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}
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return (true);
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}
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static int
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hn_synth_attach(struct hn_softc *sc, int mtu)
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{
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@ -4383,6 +4423,9 @@ hn_synth_attach(struct hn_softc *sc, int mtu)
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KASSERT((sc->hn_flags & HN_FLAG_SYNTH_ATTACHED) == 0,
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("synthetic parts were attached"));
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if (!hn_synth_attachable(sc))
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return (ENXIO);
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/* Save capabilities for later verification. */
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old_caps = sc->hn_caps;
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sc->hn_caps = 0;
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@ -91,7 +91,8 @@ struct hn_rx_ring {
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#define HN_TRUST_HCSUM_TCP 0x0002
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#define HN_TRUST_HCSUM_UDP 0x0004
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#define HN_RX_FLAG_ATTACHED 0x1
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#define HN_RX_FLAG_ATTACHED 0x0001
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#define HN_RX_FLAG_BR_REF 0x0002
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struct hn_tx_ring {
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#ifndef HN_USE_TXDESC_BUFRING
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@ -162,8 +163,8 @@ struct hn_tx_ring {
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struct sysctl_oid *hn_tx_sysctl_tree;
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} __aligned(CACHE_LINE_SIZE);
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#define HN_TX_FLAG_ATTACHED 0x1
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#define HN_TX_FLAG_HASHVAL 0x2 /* support HASHVAL pktinfo */
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#define HN_TX_FLAG_ATTACHED 0x0001
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#define HN_TX_FLAG_HASHVAL 0x0002 /* support HASHVAL pktinfo */
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/*
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* Device-specific softc structure
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@ -237,6 +238,10 @@ struct hn_softc {
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#define HN_FLAG_HAS_RSSIND 0x0008
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#define HN_FLAG_SYNTH_ATTACHED 0x0010
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#define HN_FLAG_NO_SLEEPING 0x0020
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#define HN_FLAG_RXBUF_REF 0x0040
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#define HN_FLAG_CHIM_REF 0x0080
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#define HN_FLAG_ERRORS (HN_FLAG_RXBUF_REF | HN_FLAG_CHIM_REF)
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#define HN_NO_SLEEPING(sc) \
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do { \
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