Allow for vlan(4) interfaces with MTU of 1500 bytes to be configured
on top of epair(4) virtual interfaces, since there's no physical
hardware associated with epair interfaces which would imply any
c

Allow for vlan(4) interfaces with MTU of 1500 bytes to be configured
on top of epair(4) virtual interfaces, since there's no physical
hardware associated with epair interfaces which would imply any
constraints on MTU sizes.

MFC after: 3 days

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Let epair(4) virtual interfaces report fake link / media status,
by borrowing the skeleton of if_media manipulation and reporting
code from if_lagg(4). The main motivation behind this change is
to a

Let epair(4) virtual interfaces report fake link / media status,
by borrowing the skeleton of if_media manipulation and reporting
code from if_lagg(4). The main motivation behind this change is
to allow for epair(4) interfaces to participate in STP if_bridge(4)
configurations.

Reviewed by: bz
MFC after: 3 days

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svn+ssh://svn.freebsd.org/base/head@216199

Sync: merge r215464 through r215708 from ^/head.

Add a missing ';' and change the debugging sysctl from xint to int.

Submitted by: Mikolaj Golub (to.my.trociny gmail.com)
MFC after: 3 days

Merge svn+ssh://svn.freebsd.org/base/head@214309

MFp4 CH=183259:

No reason to use if_free_type() as we don't change our type.
Just if_free() is fine.

MFC after: 3 days

MFp4 CH=182972:

Add explicit linkstate UP/DOWN for the epair. This is needed by carp(4)
and other things to work.

MFC after: 5 days

Merge svn+ssh://svn.freebsd.org/base/head@209086

Update several places that iterate over CPUs to use CPU_FOREACH().

Update to current version of head.

MFC r204805:

Rework reference counting in case we queue into the netisr,
or overflow the netisr queue and fall back to the interface
queue so that we can garuantee that the ifnet pointer stays

MFC r204805:

Rework reference counting in case we queue into the netisr,
or overflow the netisr queue and fall back to the interface
queue so that we can garuantee that the ifnet pointer stays
valid. Formerly we ended up with reference counts <= 0 in
case the netisr had returned ENOBUFS. The idea is to track
any packet in the netisr queue and only change the refount
on edge operations for the fallback interface queue. This
also avoids problems in case the if_snd.ifq_len lies to us.

Also rework refount assertions to make sure they trigger if
we go below 1. Formerly a negative refence count did not
trigger the assert as the refcount variable is u_int.

show more ...

Rework reference counting in case we queue into the netisr,
or overflow the netisr queue and fall back to the interface
queue so that we can garuantee that the ifnet pointer stays
valid. Formerly w

Rework reference counting in case we queue into the netisr,
or overflow the netisr queue and fall back to the interface
queue so that we can garuantee that the ifnet pointer stays
valid. Formerly we ended up with reference counts <= 0 in
case the netisr had returned ENOBUFS. The idea is to track
any packet in the netisr queue and only change the refount
on edge operations for the fallback interface queue. This
also avoids problems in case the if_snd.ifq_len lies to us.

Also rework refount assertions to make sure they trigger if
we go below 1. Formerly a negative refence count did not
trigger the assert as the refcount variable is u_int.

Sponsored by: ISPsystem
MFC after: 5 days

show more ...

IFH@204581

MFC r201995:
Correct a typo.

Correct a typo.

MFC after: 5 days

Merge from head

- MFC @196061

Merge the remainder of kern_vimage.c and vimage.h into vnet.c and
vnet.h, we now use jails (rather than vimages) as the abstraction
for virtualization management, and what remained was specific to
vi

Merge the remainder of kern_vimage.c and vimage.h into vnet.c and
vnet.h, we now use jails (rather than vimages) as the abstraction
for virtualization management, and what remained was specific to
virtual network stacks. Minor cleanups are done in the process,
and comments updated to reflect these changes.

Reviewed by: bz
Approved by: re (vimage blanket)

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Update epair(4) to the new netisr implementation and polish
things a bit:
- use dpcpu data to track the ifps with packets queued up,
- per-cpu locking and driver flags
- along with .nh_drainedcpu and

Update epair(4) to the new netisr implementation and polish
things a bit:
- use dpcpu data to track the ifps with packets queued up,
- per-cpu locking and driver flags
- along with .nh_drainedcpu and NETISR_POLICY_CPU.
- Put the mbufs in flight reference count, preventing interfaces
from going away, under INVARIANTS as this is a general problem
of the stack and should be solved in if.c/netisr but still good
to verify the internal queuing logic.
- Permit changing the MTU to virtually everythinkg like we do for loopback.

Hook epair(4) up to the build.

Approved by: re (kib)

show more ...

- MFC

Merge from p4: CH154790,154793,154874

Import if_epair(4), a virtual cross-over Ethernet-like interface pair.

Note these files are 1:1 from p4 and not yet connected to the build
not knowing about

Merge from p4: CH154790,154793,154874

Import if_epair(4), a virtual cross-over Ethernet-like interface pair.

Note these files are 1:1 from p4 and not yet connected to the build
not knowing about the new netisr interface.

Sponsored by: The FreeBSD Foundation

show more ...

Rework reference counting in case we queue into the netisr,
or overflow the netisr queue and fall back to the interface
queue so that we can garuantee that the ifnet pointer stays
valid. Formerly w

Rework reference counting in case we queue into the netisr,
or overflow the netisr queue and fall back to the interface
queue so that we can garuantee that the ifnet pointer stays
valid. Formerly we ended up with reference counts <= 0 in
case the netisr had returned ENOBUFS. The idea is to track
any packet in the netisr queue and only change the refount
on edge operations for the fallback interface queue. This
also avoids problems in case the if_snd.ifq_len lies to us.

Also rework refount assertions to make sure they trigger if
we go below 1. Formerly a negative refence count did not
trigger the assert as the refcount variable is u_int.

Sponsored by: ISPsystem
MFC after: 5 days

show more ...

Correct a typo.

MFC after: 5 days

- MFC @196061