Module Name: src
Committed By: riastradh
Date: Fri Aug 12 10:57:07 UTC 2022
Modified Files:
src/sys/dev/pci: if_wm.c
Log Message:
wm(4): if_flags and IFNET_LOCK audit
Don't touch if_flags without IFNET_LOCK:
- If only core lock is held, use sc_if_flags.
- If only txq lock is held, use txq_stopping.
=> Verified all paths guarantee !txq_stopping, so assert.
- Make sure sc_if_flags is updated on stop.
- Make wm_init fail once we enter wm_detach.
- Sprinkle assertions.
Author: Taylor R Campbell <riastr...@netbsd.org>
To generate a diff of this commit:
cvs rdiff -u -r1.759 -r1.760 src/sys/dev/pci/if_wm.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/dev/pci/if_wm.c
diff -u src/sys/dev/pci/if_wm.c:1.759 src/sys/dev/pci/if_wm.c:1.760
--- src/sys/dev/pci/if_wm.c:1.759 Fri Aug 12 10:55:01 2022
+++ src/sys/dev/pci/if_wm.c Fri Aug 12 10:57:06 2022
@@ -1,4 +1,4 @@
-/* $NetBSD: if_wm.c,v 1.759 2022/08/12 10:55:01 riastradh Exp $ */
+/* $NetBSD: if_wm.c,v 1.760 2022/08/12 10:57:06 riastradh Exp $ */
/*
* Copyright (c) 2001, 2002, 2003, 2004 Wasabi Systems, Inc.
@@ -82,7 +82,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_wm.c,v 1.759 2022/08/12 10:55:01 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_wm.c,v 1.760 2022/08/12 10:57:06 riastradh Exp $");
#ifdef _KERNEL_OPT
#include "opt_net_mpsafe.h"
@@ -705,6 +705,9 @@ struct wm_softc {
struct wm_phyop phy;
struct wm_nvmop nvm;
+
+ bool sc_dying;
+
#ifdef WM_DEBUG
uint32_t sc_debug;
#endif
@@ -3385,7 +3388,10 @@ wm_detach(device_t self, int flags __unu
return 0;
/* Stop the interface. Callouts are stopped in it. */
+ IFNET_LOCK(ifp);
+ sc->sc_dying = true;
wm_stop(ifp, 1);
+ IFNET_UNLOCK(ifp);
pmf_device_deregister(self);
@@ -3572,6 +3578,7 @@ wm_resume(device_t self, const pmf_qual_
if (sc->sc_type >= WM_T_PCH2)
wm_resume_workarounds_pchlan(sc);
+ IFNET_LOCK(ifp);
if ((ifp->if_flags & IFF_UP) == 0) {
/* >= PCH_SPT hardware workaround before reset. */
if (sc->sc_type >= WM_T_PCH_SPT)
@@ -3590,6 +3597,7 @@ wm_resume(device_t self, const pmf_qual_
* via wm_init().
*/
}
+ IFNET_UNLOCK(ifp);
return true;
}
@@ -4326,6 +4334,7 @@ wm_set_filter(struct wm_softc *sc)
DPRINTF(sc, WM_DEBUG_INIT, ("%s: %s called\n",
device_xname(sc->sc_dev), __func__));
+ KASSERT(WM_CORE_LOCKED(sc));
if (sc->sc_type >= WM_T_82544)
mta_reg = WMREG_CORDOVA_MTA;
@@ -4334,9 +4343,9 @@ wm_set_filter(struct wm_softc *sc)
sc->sc_rctl &= ~(RCTL_BAM | RCTL_UPE | RCTL_MPE);
- if (ifp->if_flags & IFF_BROADCAST)
+ if (sc->sc_if_flags & IFF_BROADCAST)
sc->sc_rctl |= RCTL_BAM;
- if (ifp->if_flags & IFF_PROMISC) {
+ if (sc->sc_if_flags & IFF_PROMISC) {
sc->sc_rctl |= RCTL_UPE;
ETHER_LOCK(ec);
ec->ec_flags |= ETHER_F_ALLMULTI;
@@ -5257,6 +5266,8 @@ wm_flush_desc_rings(struct wm_softc *sc)
int nexttx;
uint32_t rctl;
+ KASSERT(IFNET_LOCKED(&sc->sc_ethercom.ec_if));
+
/* First, disable MULR fix in FEXTNVM11 */
reg = CSR_READ(sc, WMREG_FEXTNVM11);
reg |= FEXTNVM11_DIS_MULRFIX;
@@ -6482,6 +6493,9 @@ wm_init(struct ifnet *ifp)
KASSERT(IFNET_LOCKED(ifp));
+ if (sc->sc_dying)
+ return ENXIO;
+
WM_CORE_LOCK(sc);
ret = wm_init_locked(ifp);
WM_CORE_UNLOCK(sc);
@@ -7081,6 +7095,7 @@ wm_stop(struct ifnet *ifp, int disable)
struct wm_softc *sc = ifp->if_softc;
ASSERT_SLEEPABLE();
+ KASSERT(IFNET_LOCKED(ifp));
WM_CORE_LOCK(sc);
wm_stop_locked(ifp, disable ? true : false, true);
@@ -7106,6 +7121,7 @@ wm_stop_locked(struct ifnet *ifp, bool d
DPRINTF(sc, WM_DEBUG_INIT, ("%s: %s called\n",
device_xname(sc->sc_dev), __func__));
+ KASSERT(IFNET_LOCKED(ifp));
KASSERT(WM_CORE_LOCKED(sc));
wm_set_stopping_flags(sc);
@@ -7185,6 +7201,7 @@ wm_stop_locked(struct ifnet *ifp, bool d
/* Mark the interface as down and cancel the watchdog timer. */
ifp->if_flags &= ~IFF_RUNNING;
+ sc->sc_if_flags = ifp->if_flags;
if (disable) {
for (i = 0; i < sc->sc_nqueues; i++) {
@@ -8384,9 +8401,8 @@ wm_send_common_locked(struct ifnet *ifp,
bool remap = true;
KASSERT(mutex_owned(txq->txq_lock));
+ KASSERT(!txq->txq_stopping);
- if ((ifp->if_flags & IFF_RUNNING) == 0)
- return;
if ((txq->txq_flags & WM_TXQ_NO_SPACE) != 0)
return;
@@ -9002,9 +9018,8 @@ wm_nq_send_common_locked(struct ifnet *i
bool remap = true;
KASSERT(mutex_owned(txq->txq_lock));
+ KASSERT(!txq->txq_stopping);
- if ((ifp->if_flags & IFF_RUNNING) == 0)
- return;
if ((txq->txq_flags & WM_TXQ_NO_SPACE) != 0)
return;
@@ -13156,7 +13171,7 @@ wm_tbi_tick(struct wm_softc *sc)
sc->sc_tbi_serdes_ticks = 0;
}
- if ((sc->sc_ethercom.ec_if.if_flags & IFF_UP) == 0)
+ if ((sc->sc_if_flags & IFF_UP) == 0)
goto setled;
if ((status & STATUS_LU) == 0) {
@@ -15650,6 +15665,8 @@ wm_init_manageability(struct wm_softc *s
DPRINTF(sc, WM_DEBUG_INIT, ("%s: %s called\n",
device_xname(sc->sc_dev), __func__));
+ KASSERT(IFNET_LOCKED(&sc->sc_ethercom.ec_if));
+
if (sc->sc_flags & WM_F_HAS_MANAGE) {
uint32_t manc2h = CSR_READ(sc, WMREG_MANC2H);
uint32_t manc = CSR_READ(sc, WMREG_MANC);
