(ECMP) for both IPv4 and IPv6. Previously, multipath route insertion
is disallowed. For example,
route add -net 192.103.54.0/24 10.9.44.1
route add -net 192.103.54.0/24 10.9.44.2
The second route insertion will trigger an error message of
"add net 192.103.54.0/24: gateway 10.2.5.2: route already in table"
Multiple default routes can also be inserted. Here is the netstat
output:
default 10.2.5.1 UGS 0 3074 bge0 =>
default 10.2.5.2 UGS 0 0 bge0
When multipath routes exist, the "route delete" command requires
a specific gateway to be specified or else an error message would
be displayed. For example,
route delete default
would fail and trigger the following error message:
"route: writing to routing socket: No such process"
"delete net default: not in table"
On the other hand,
route delete default 10.2.5.2
would be successful: "delete net default: gateway 10.2.5.2"
One does not have to specify a gateway if there is only a single
route for a particular destination.
I need to perform more testings on address aliases and multiple
interfaces that have the same IP prefixes. This patch as it
stands today is not yet ready for prime time. Therefore, the ECMP
code fragments are fully guarded by the RADIX_MPATH macro.
Include the "options RADIX_MPATH" in the kernel configuration
to enable this feature.
Reviewed by: robert, sam, gnn, julian, kmacy
did not stop at the right node. Change the backtracking check from
smaller-than to smaller-or-equal to prevent this from happening.
While here fix one additional problem where the insertion of the
default route traversed the entire tree.
PR: kern/38752
Submitted by: qingli (before I became committer)
Reviewed by: andre
MFC after: 3 days
Clearly comment the assumptions on the structure of keys (addresses)
and masks, and introduce a macro, LEN(p), to extract the size of these
objects instead of using *(u_char *)p which might be confusing.
Comment the confusion in the types used to pass around pointers
to keys and masks, as a reminder to fix that at some point.
Add a few comments on what some functions do.
Comment a probably inefficient (but still correct) section of code
in rn_walktree_from()
The object code generated after this commit is the same as before.
At some point we should also change same variable identifiers such
as "t, tt, ttt" to fancier names such as "root, left, right" (just
in case someone wants to understand the code!), replace misspelling
of NULL as 0, remove 'register' declarations that make little sense
these days.
+ remove useless wrappers around bcmp(), bcopy(), bzero().
The code assumes that bcmp() returns 0 if the size is 0, but
this is true for both the libc and the libkern versions.
+ nuke Bcmp, Bzero, Bcopy from radix.h now that nobody uses them anymore.
the mbuf allocator flags {M_TRYWAIT, M_DONTWAIT}.
o Fix a bpf_compat issue where malloc() was defined to just call
bpf_alloc() and pass the 'canwait' flag(s) along. It's been changed
to call bpf_alloc() but pass the corresponding M_TRYWAIT or M_DONTWAIT
flag (and only one of those two).
Submitted by: Hiten Pandya <hiten@unixdaemons.com> (hiten->commit_count++)
not removing tabs before "__P((", and not outdenting continuation lines
to preserve non-KNF lining up of code with parentheses. Switch to KNF
formatting and/or rewrap the whole prototype in some cases.
seems to be that the nodes are bzero'd beforehand, but the submitter
found that this was not always the case, and in any event defensive
programming here costs epsilon squared.
PR: 22244
Submitted by: Dave Gillam <daveg@chiaro.com>
search routine, and scratching our heads over why it was so obfuscated.
This delta fixes a number of confusing style bugs and renames several
structure members to have more meaningful names. There remain a number
of odd control-flow structures. These changes do not affect the generated
code.
is an application space macro and the applications are supposed to be free
to use it as they please (but cannot). This is consistant with the other
BSD's who made this change quite some time ago. More commits to come.
This caused a panic in rtfreee() called with a root node from the
routing socket code (when processing a RTM_GET message looking for
the default route while there is none).
Since no existing code seems to have any use getting the root node
from rn_match(), it seems cleaner never to return it rather than
check for this condition at the caller's.
PR: kern/12265
able to expand the zeros, ones etc masks on the fly. It seems a good
number of domains don't set the rn_maxkey variable anyway, and because
this is a domain itself, there is no guarantee we've been called after
a protocol that actually has set it (ie: inet), so start with a maxkey
of a relatively sane size as a base point until it can adapt on the fly.
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.
Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.
This submission was done by hand-applying FreeBSD local modifications on
top of the UCB code, rather than trying to patch the UCB code in on top
of the FreeBSD code due to the extensive changes.
Reviewed by: pst (been handling 30k routes for 4+ months)
Obtained from: Sklower/Woody/Honing/Traina (8.4 UCB release)
