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| author | brueffer <brueffer@FreeBSD.org> | 2003-11-11 16:41:27 +0000 |
|---|---|---|
| committer | brueffer <brueffer@FreeBSD.org> | 2003-11-11 16:41:27 +0000 |
| commit | 8ffd3da8754be2635fb1bd8e42c87ecff2dd2ae9 (patch) | |
| tree | 226805ed97e50722fe589f0ba8c3ee99d9ec980c /lib/libc/sys/kqueue.2 | |
| parent | e57672a655e52ef52e06f8c7d7097c0e039c8a9c (diff) | |
| download | FreeBSD-src-8ffd3da8754be2635fb1bd8e42c87ecff2dd2ae9.zip FreeBSD-src-8ffd3da8754be2635fb1bd8e42c87ecff2dd2ae9.tar.gz | |
Add information about the EVFILT_NETDEV filter
PR: docs/56872 (based on)
Submitted by: Suleiman Souhlal <refugee@vt.edu>
Reviewed by: hmp, jmg
Diffstat (limited to 'lib/libc/sys/kqueue.2')
| -rw-r--r-- | lib/libc/sys/kqueue.2 | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/lib/libc/sys/kqueue.2 b/lib/libc/sys/kqueue.2 index 73a760e..a3acae4 100644 --- a/lib/libc/sys/kqueue.2 +++ b/lib/libc/sys/kqueue.2 @@ -412,6 +412,23 @@ On return, contains the number of times the timeout has expired since the last call to .Fn kevent . This filter automatically sets the EV_CLEAR flag internally. +.It Dv EVFILT_NETDEV +Takes a descriptor to a network interface as the identifier, and the events to watch for in +.Va fflags . +It returns, when one or more of the requested events occur on the descriptor. +The events to monitor are: +.Bl -tag -width XXNOTE_LINKDOWN +.It Dv NOTE_LINKUP +The link is up. +.It Dv NOTE_LINKDOWN +The link is down. +.It Dv NOTE_LINKINV +The link state is invalid. +.El +.Pp +On return, +.Va fflags +contains the events which triggered the filter. .El .Sh RETURN VALUES The @@ -512,3 +529,10 @@ It is currently not possible to watch a .Xr vnode 9 that resides on anything but a UFS file system. +.Pp +The +.Dv EVFILT_NETDEV +filter is currently only implemented for devices that use the +.Xr miibus 4 +driver for LINKUP and LINKDOWN operations. +Therefore, it will not work with many non-ethernet devices. |
