Replace lwp_delref() + mutex_enter() with: mutex_enter() + lwp_delref2().
This avoids extra taking and exiting from a mutex.
Add missing mutex_exit() for LW_SYSTEM.
Do not switch lwp for PT_SET_SIGINFO. This operation is not needed and
avoids panic for >2 LWPs as p_lock is attempted to be entered again in a
critical section.
* More strict POSIX shell support
* Interfaces have an implicit metric of 0 unless specified
* Inline comments are stripped from nameserver and domain entries
An sav can be removed from belonging list(s) twice resulting in an assertion
failure of pslist. It can occur if the following two operations interleave:
(i) a deletion or a update of an SA via the API, and
(ii) a state change (key_sa_chgstate) of the same SA by the timer.
Note that even (ii) removes an sav once from its list(s) on a update.
The cause of the race condition is that the two operations are not serialized
and (i) doesn't get and remove an sav from belonging list(s) atomically. So
(ii) can be inserted between an acquisition and a removal of (i).
Avoid the race condition by making (i) atomic.
First proposed by jmcneill in 2017 and modified by me.
How to use:
- Set callback function:
ether_set_vlan_cb(struct ethercom *, ether_vlancb_t)
- Callback. This function is called when a vlan is attached/detached to the
parent interface:
int (*ether_vlancb_t)(struct ethercom *ec, uint16_t vlanid, bool set);
- ifconfig(8)
ifconfig ixg0 [-]vlan-hwfilter
Note that ETHERCAP_VLAN_HWFILTER is set by default on ixg(4) because
the PF driver usually enable "all block" filter by default.
Without this, a rumpkernel (appropriately modified) built with SCTP
enabled will try to assign the function pointers, but the targets
are only available in rumpnet. We cannot link the rumpkernel against
rumpnet because rumpnet is already linked against rumpkernel and we
would end up with a circular dependency.
As reported in private Email by rjs@
