diff options
author | Konstantin Belousov <kib@FreeBSD.org> | 2009-06-10 20:59:32 +0000 |
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committer | Konstantin Belousov <kib@FreeBSD.org> | 2009-06-10 20:59:32 +0000 |
commit | d8b0556c6dcaf4c506039f86af2b52b29524f89e (patch) | |
tree | 9c12d3a92805f512ad054e2b8fa5618e0bd9cc71 /sys/net | |
parent | 5591364265207deced4976e9d4394c403a278fe9 (diff) | |
download | src-d8b0556c6dcaf4c506039f86af2b52b29524f89e.tar.gz src-d8b0556c6dcaf4c506039f86af2b52b29524f89e.zip |
Adapt vfs kqfilter to the shared vnode lock used by zfs write vop. Use
vnode interlock to protect the knote fields [1]. The locking assumes
that shared vnode lock is held, thus we get exclusive access to knote
either by exclusive vnode lock protection, or by shared vnode lock +
vnode interlock.
Do not use kl_locked() method to assert either lock ownership or the
fact that curthread does not own the lock. For shared locks, ownership
is not recorded, e.g. VOP_ISLOCKED can return LK_SHARED for the shared
lock not owned by curthread, causing false positives in kqueue subsystem
assertions about knlist lock.
Remove kl_locked method from knlist lock vector, and add two separate
assertion methods kl_assert_locked and kl_assert_unlocked, that are
supposed to use proper asserts. Change knlist_init accordingly.
Add convenience function knlist_init_mtx to reduce number of arguments
for typical knlist initialization.
Submitted by: jhb [1]
Noted by: jhb [2]
Reviewed by: jhb
Tested by: rnoland
Notes
Notes:
svn path=/head/; revision=193951
Diffstat (limited to 'sys/net')
-rw-r--r-- | sys/net/bpf.c | 2 | ||||
-rw-r--r-- | sys/net/if.c | 4 | ||||
-rw-r--r-- | sys/net/if_tap.c | 2 | ||||
-rw-r--r-- | sys/net/if_tun.c | 2 |
4 files changed, 5 insertions, 5 deletions
diff --git a/sys/net/bpf.c b/sys/net/bpf.c index c74d09fbf305..6c95fc65c138 100644 --- a/sys/net/bpf.c +++ b/sys/net/bpf.c @@ -648,7 +648,7 @@ bpfopen(struct cdev *dev, int flags, int fmt, struct thread *td) #endif mtx_init(&d->bd_mtx, devtoname(dev), "bpf cdev lock", MTX_DEF); callout_init(&d->bd_callout, CALLOUT_MPSAFE); - knlist_init(&d->bd_sel.si_note, &d->bd_mtx, NULL, NULL, NULL); + knlist_init_mtx(&d->bd_sel.si_note, &d->bd_mtx); return (0); } diff --git a/sys/net/if.c b/sys/net/if.c index ba4cb1a8c19b..c95de07b5bb9 100644 --- a/sys/net/if.c +++ b/sys/net/if.c @@ -445,7 +445,7 @@ vnet_net_iattach(const void *unused __unused) TAILQ_INIT(&V_ifnet); TAILQ_INIT(&V_ifg_head); - knlist_init(&V_ifklist, NULL, NULL, NULL, NULL); + knlist_init_mtx(&V_ifklist, NULL); if_grow(); /* create initial table */ return (0); @@ -548,7 +548,7 @@ if_alloc(u_char type) TAILQ_INIT(&ifp->if_prefixhead); TAILQ_INIT(&ifp->if_multiaddrs); TAILQ_INIT(&ifp->if_groups); - knlist_init(&ifp->if_klist, NULL, NULL, NULL, NULL); + knlist_init_mtx(&ifp->if_klist, NULL); #ifdef MAC mac_ifnet_init(ifp); #endif diff --git a/sys/net/if_tap.c b/sys/net/if_tap.c index 92563012c28d..6668d943f31b 100644 --- a/sys/net/if_tap.c +++ b/sys/net/if_tap.c @@ -462,7 +462,7 @@ tapcreate(struct cdev *dev) tp->tap_flags |= TAP_INITED; mtx_unlock(&tp->tap_mtx); - knlist_init(&tp->tap_rsel.si_note, NULL, NULL, NULL, NULL); + knlist_init_mtx(&tp->tap_rsel.si_note, NULL); TAPDEBUG("interface %s is created. minor = %#x\n", ifp->if_xname, dev2unit(dev)); diff --git a/sys/net/if_tun.c b/sys/net/if_tun.c index 6b352e855c6e..03dd4ab8d883 100644 --- a/sys/net/if_tun.c +++ b/sys/net/if_tun.c @@ -391,7 +391,7 @@ tuncreate(const char *name, struct cdev *dev) IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); ifp->if_snd.ifq_drv_maxlen = 0; IFQ_SET_READY(&ifp->if_snd); - knlist_init(&sc->tun_rsel.si_note, NULL, NULL, NULL, NULL); + knlist_init_mtx(&sc->tun_rsel.si_note, NULL); if_attach(ifp); bpfattach(ifp, DLT_NULL, sizeof(u_int32_t)); |