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ok gnezdo@ semarie@ mpi@
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simplify the handling of the fragment list. Now the functions
ip_fragment() and ip6_fragment() always consume the mbuf. They
free the mbuf and mbuf list in case of an error and take care about
the counter. Adjust the code a bit to make v4 and v6 look similar.
Fixes a potential mbuf leak when pf_route6() called pf_refragment6()
and it failed. Now the mbuf is always freed by ip6_fragment().
OK dlg@ mvs@
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time_second(9) and time_uptime(9) are widely used in the kernel to
quickly get the system UTC or system uptime as a time_t. However,
time_t is 64-bit everywhere, so it is not generally safe to use them
on 32-bit platforms: you have a split-read problem if your hardware
cannot perform atomic 64-bit reads.
This patch replaces time_second(9) with gettime(9), a safer successor
interface, throughout the kernel. Similarly, time_uptime(9) is replaced
with getuptime(9).
There is a performance cost on 32-bit platforms in exchange for
eliminating the split-read problem: instead of two register reads you
now have a lockless read loop to pull the values from the timehands.
This is really not *too* bad in the grand scheme of things, but
compared to what we were doing before it is several times slower.
There is no performance cost on 64-bit (__LP64__) platforms.
With input from visa@, dlg@, and tedu@.
Several bugs squashed by visa@.
ok kettenis@
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time_second is unix time so it can be affected by clock changes.
time_uptime is monotonic so it isnt affected by clock changes. that
in turn means route expiries wont jump with clock changes if set
against time_uptime.
the expiry is translated into unix time for export to userland though.
Should fix mismatch between route timers that were already converted
and ND default routers that were still using time_second.
Tested by matthieu@ and sthen@
ok sthen@, dlg@
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namespace. the history of this file is that it was a modified version of
ip_id.c (with static functions to avoid clashes), then that file was
rewritten, then this file lost static.
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have any direct symbols used. Tested for indirect use by compiling
amd64/i386/sparc64 kernels.
ok tedu@ deraadt@
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to include that than rdnvar.h. ok deraadt dlg
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ok claudio@ naddy@
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near maximal (2^32) cycle times. These are useful for network
IDs in cases where there are negative consequences to ID prediction
and/or reuse.
Use the idgen32() functions to generate IPv6 IDs and NFS client/server
XIDs.
Pseudorandom permutation code in crypto/idgen.c based on public
domain skip32.c from Greg Rose.
feedback & ok thib@ deraadt@
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power of two.
use arc4random_bytes() when requesting more than a word of PRNG
output.
ok deraadt@
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sys/netinet/in_pcb.c and sys/net/bridgestp.c ok henning@
sys/dev/pci/bktr/* ok jakemsr@
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things such that code that only need a second-resolution uptime or wall
time, and used to get that from time.tv_secs or mono_time.tv_secs now get
this from separate time_t globals time_second and time_uptime.
ok art@ niklas@ nordin@
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- seed2 is necessary, but use it as "seed2 + x" not "seed2 ^ x".
- skipping number is not needed, so disable it for 16bit generator (makes
the repetition period to 30000)
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cleanup IPv6 flowlabel handling. deraadt ok
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jsg
bluhm
cheloha
deraadt
mpi
tedu
jsing
djm
martynas
tholo
itojun