the number of bytes in the send queue, and FIONSPACE reports the
number of free bytes in the send queue. These ioctls permit applications
to monitor file descriptor transmission dynamics.
In examining prior art, FIONWRITE exists with the semantics given
here. FIONSPACE is provided so that programs may easily determine how
much space is left in the send queue; they do not need to know the
send queue size.
The fact that a write may block even if there is enough space in the
send queue for it is noted in the documentation.
FIONWRITE functionality may be used to implement TIOCOUTQ for Linux
emulation - Linux extended this ioctl to sockets, even though they are
not ttys.
* Encapsulate all the ring-specific variables into a substructure. (This will
help with some potential code sharing.)
* Don't bother with "last buffer complete" interrupts -- we should be taking an
interrupt anyway because we set IOC on every buffer.
* Likewise, ignore CELV; it's meaningless to us.
* Get rid of the FIFO error counters, since this doesn't actually happen any
more.
is ... slightly confusing. Instead calculate the total size of the dump
beforehand and show the number of MB we still need to dump instead - just
like 386 does it.
Also, allow any sample rate between 8000 and 48000Hz. (This range should
probably be larger, but this is what's known to work.)
Another 180 bytes shaved.
was causing some "fifo under/overrun" errors during the initial trigger.
Also fixes a ring synchronization problem introduced in the earlier changes.
This should completely fix the FIFO errors with auich.
1) Update the queue pointers any time we get a block completion interrupt,
not just when we hit the last block.
2) Set the "back-to-back enable" bit.
In addition:
3) Make sure we ack every block we transfer; there was a bug that could cause
the audio layer to get out of sync.
the fastroute function so that it uses accurate packet information about
the packet being sent out rather than the packet received (impacts both
return-rst and return-icmp features.)
PR: kern/27093
as a side-effect. Don't bother handling IFF_PROMISC here, because
ether_ioctl() already calls (*if_init)() to handle flags changes.
When adding/deleting multicast addresses, only whack the address
filter if the interface is marked RUNNING.
Fixes kern/27678.
