rearrange / replace / adjust several INIT_VNET_* initializer
macros, all of which currently resolve to whitespace.
Reviewed by: bz (an older version of the patch)
Approved by: julian (mentor)
(colloquially known as if_addrlist). Currently not acquired around
interface address loops that call out to the routing code due to
potential lock order issues.
MFC after: 3 weeks
lookup of 'ia' from if_addrhead through most use. Note that we
currently have to drop it prematurely in some cases due to calls out to
the routing and interface code while using 'ia', but this closes many
races. Annotate several potential races that persist after this change.
Move to using M_NOWAIT for allocating new interface addresses due to
lock(s) being held.
MFC after: 3 weeks
of the implementation of ioctls. This makes the mapping of ioctls to
specific privileges more explicit, and also simplifies the
implementation by reducing the use of FALLTHROUGH handling in switch.
While this is not intended to be a functional change, it does mean
that certain privilege checks are now performed earlier, so EPERM
might be returned in preference to EADDRNOTAVAIL for management
ioctls that could have failed for both reasons.
MFC after: 3 weeks
that it is easier to lock:
- Handle the unsupported ioctl case at the beginning of in_control(),
handing off to ifp->if_ioctl, rather than looking up interfaces and
addresses unnecessarily in this case.
- Make it an invariant that ifp is always non-NULL when running
in_control()-implemented ioctls, simplifying the code structure.
MFC after: 3 weeks
Match the bracketing in netstat.
Since the cleanup of MROUTING, ports have broken because they
expect to include <netinet/ip_mroute.h> without including
<sys/queue.h>. Fix breakage at source.
The real fix, of course, is to fix the MROUTING APIs by blowing them
away and replacing them with something else...
variable. Acquire the interface address list lock when iterating over
the interface address list searching for a matching received broadcast
address.
MFC after: 2 weeks
we recognize its a retransmit, ahead of the PR-SCTP
work. Without this fix, we end up NOT reducing flight
size and causing an miscalculation when PR-SCTP is active
and data is skipped.
Obtained from: Michael Tuexen.
and CARPSTATS_INC(), rather than directly manipulating the fields of
the structure. This will make it easier to change the implementation
of these statistics, such as using per-CPU versions of the data
structure.
MFC after: 3 days
and PIMSTAT_INC(), rather than directly manipulating the fields of
the structure. This will make it easier to change the
implementation of these statistics, such as using per-CPU versions
of the data structure.
MFC after: 3 days
and MRTSTAT_INC(), rather than directly manipulating the fields of
the structure. This will make it easier to change the
implementation of these statistics, such as using per-CPU versions
of the data structure.
MFC after: 3 days
IGMPSTAT_ADD() and IGMPSTAT_INC(), rather than directly
manipulating the fields of the structure. This will make it
easier to change the implementation of these statistics,
such as using per-CPU versions of the data structures.
MFC after: 3 days
macros: ICMPSTAT_ADD(), ICMPSTAT_INC(), ICMP6STAT_ADD(), and
ICMP6STAT_INC(), rather than directly manipulating the fields
of these structures across the kernel. This will make it
easier to change the implementation of these statistics,
such as using per-CPU versions of the data structures.
In on case, icmp6stat members are manipulated indirectly, by
icmp6_errcount(), and this will require further work to fix
for per-CPU stats.
MFC after: 3 days
and UDPSTAT_INC(), rather than directly manipulating the fields
across the kernel. This will make it easier to change the
implementation of these statistics, such as using per-CPU versions
of the data structures.
MFC after: 3 days
IPSTAT_INC(), IPSTAT_SUB(), and IPSTAT_DEC(), rather than directly
manipulating the fields across the kernel. This will make it easier
to change the implementation of these statistics, such as using
per-CPU versions of the data structures.
MFC after: 3 days
TCPSTAT_INC(), rather than directly manipulating the fields across the
kernel. This will make it easier to change the implementation of
these statistics, such as using per-CPU versions of the data structures.
MFC after: 3 days
-UdpAliasIn(): correctly check return code after modules ran.
-alias_nbt: in case of malformed packets (or some other unrecoverable
error), toss the packet.
dependency tracking and ordering enforcement.
With this change, per-vnet initialization functions introduced with
r190787 are no longer directly called from traditional initialization
functions (which cc in most cases inlined to pre-r190787 code), but are
instead registered via the vnet framework first, and are invoked only
after all prerequisite modules have been initialized. In the long run,
this framework should allow us to both initialize and dismantle
multiple vnet instances in a correct order.
The problem this change aims to solve is how to replay the
initialization sequence of various network stack components, which
have been traditionally triggered via different mechanisms (SYSINIT,
protosw). Note that this initialization sequence was and still can be
subtly different depending on whether certain pieces of code have been
statically compiled into the kernel, loaded as modules by boot
loader, or kldloaded at run time.
The approach is simple - we record the initialization sequence
established by the traditional mechanisms whenever vnet_mod_register()
is called for a particular vnet module. The vnet_mod_register_multi()
variant allows a single initializer function to be registered multiple
times but with different arguments - currently this is only used in
kern/uipc_domain.c by net_add_domain() with different struct domain *
as arguments, which allows for protosw-registered initialization
routines to be invoked in a correct order by the new vnet
initialization framework.
For the purpose of identifying vnet modules, each vnet module has to
have a unique ID, which is statically assigned in sys/vimage.h.
Dynamic assignment of vnet module IDs is not supported yet.
A vnet module may specify a single prerequisite module at registration
time by filling in the vmi_dependson field of its vnet_modinfo struct
with the ID of the module it depends on. Unless specified otherwise,
all vnet modules depend on VNET_MOD_NET (container for ifnet list head,
rt_tables etc.), which thus has to and will always be initialized
first. The framework will panic if it detects any unresolved
dependencies before completing system initialization. Detection of
unresolved dependencies for vnet modules registered after boot
(kldloaded modules) is not provided.
Note that the fact that each module can specify only a single
prerequisite may become problematic in the long run. In particular,
INET6 depends on INET being already instantiated, due to TCP / UDP
structures residing in INET container. IPSEC also depends on INET,
which will in turn additionally complicate making INET6-only kernel
configs a reality.
The entire registration framework can be compiled out by turning on the
VIMAGE_GLOBALS kernel config option.
Reviewed by: bz
Approved by: julian (mentor)
types of MAC overheads such as preambles, link level retransmissions
and more.
Note- this commit changes the userland/kernel ABI for pipes
(but not for ordinary firewall rules) so you need to rebuild
kernel and /sbin/ipfw to use dummynet features.
Please check the manpage for details on the new feature.
The MFC would be trivial but it breaks the ABI, so it will
be postponed until after 7.2 is released.
Interested users are welcome to apply the patch manually
to their RELENG_7 tree.
Work supported by the European Commission, Projects Onelab and
Onelab2 (contract 224263).
more adequate TCP performance with IPv6.
Changes for IPv4, r166403 and r172795, both ignored the
IPv6 counterpart and left it in the state of art of year 2000.
The same logic in syncache already shares code between v4 and v6 so
things do not need to be adapted there.
Reported by: Steinar Haug (sthaug nethelp.no)
Tested by: Steinar Haug (sthaug nethelp.no)
MFC after: 3 days
from existing functions for initializing global state.
At this stage, the new per-vnet initializer functions are
directly called from the existing global initialization code,
which should in most cases result in compiler inlining those
new functions, hence yielding a near-zero functional change.
Modify the existing initializer functions which are invoked via
protosw, like ip_init() et. al., to allow them to be invoked
multiple times, i.e. per each vnet. Global state, if any,
is initialized only if such functions are called within the
context of vnet0, which will be determined via the
IS_DEFAULT_VNET(curvnet) check (currently always true).
While here, V_irtualize a few remaining global UMA zones
used by net/netinet/netipsec networking code. While it is
not yet clear to me or anybody else whether this is the right
thing to do, at this stage this makes the code more readable,
and makes it easier to track uncollected UMA-zone-backed
objects on vnet removal. In the long run, it's quite possible
that some form of shared use of UMA zone pools among multiple
vnets should be considered.
Bump __FreeBSD_version due to changes in layout of structs
vnet_ipfw, vnet_inet and vnet_net.
Approved by: julian (mentor)
in the case where a single mbuf is allocated due to
m_getcl() returning NULL, we already call MH_ALIGN,
so do not increment m->m_data in this case.
Found during MLDv2 port.
