up to now.
The new sendfile is the code that Netflix uses to send their multiple tens
of gigabits of data per second. The new implementation features asynchronous
I/O, when I/O operations are launched, but not awaited to be complete. An
explanation of why such behavior is beneficial compared to old one is
going to be too long for a commit message, so we will skip it here.
Additional features of new syscall are extra flags, which provide an
application more control over data sent. The SF_NOCACHE flag tells
kernel that data shouldn't be cached after it was sent. The SF_READAHEAD()
macro allows to specify readahead size in pages.
The new syscalls is a drop in replacement. No modifications are required
to applications. One can take nginx binary for stable/10 and run it
successfully on head. Although SF_NODISKIO lost its original sense, as now
sendfile doesn't block, and now means something completely different (tm),
using the new sendfile the old way is absolutely safe.
Celebrates: Netflix global launch!
Sponsored by: Nginx, Inc.
Sponsored by: Netflix
Relnotes: yes
variable set rather than reading from kernel memory.
This also makes the -z (zero) flag work correctly
MFC after: 1 week
Sponsored by: Rubicon Communications, LLC (Netgate)
Differential Revision: https://reviews.freebsd.org/D4591
Unfortunately filemon/meta mode tracks all indirect dependencies here
since ld(1) is reading libelf when linking in libkvm. Churn would be
reduced if this was able to be limited to direct dependencies.
Sponsored by: EMC / Isilon Storage Division
This is so that 'make depend' is not a required build step in these
files.
DPSRCS is overall unneeded. DPSRCS already contains SRCS, so anything
which can safely be in SRCS should be. DPSRCS is mostly just a way to
generate files that should not be linked into the final PROG/LIB. For
headers and grammars it is safe for them to be in SRCS since they will
be excluded during linking and installation.
The only remaining uses of DPSRCS are for generating .c or .o files that
must be built before 'make depend' can run 'mkdep' on the SRCS c files
list. A semi-proper example is in tests/sys/kern/acct/Makefile where a
checked-in .c file has an #include on a generated .c file. The
generated .c file should not be linked into the final PROG though since
it is #include'd. The more proper way here is just to build/link it in
though without DPSRCS. Another example is in sys/modules/linux/Makefile
where a shell script runs to parse a DPSRCS .o file that should not be
linked into the module. Beyond those, the need for DPSRCS is largely
unneeded, redundant, and forces 'make depend' to be ran. Generally,
these Makefiles should avoid the need for DPSRCS and define proper
dependencies for their files as well.
An example of an improper usage and why this matters is in usr.bin/netstat.
nl_defs.h was only in DPSRCS and so was not generated during 'make all',
but only during 'make depend'. The files including it lacked proper
depenencies on it, which forced running 'make depend' to workaround that
bug. The 'make depend' target should mostly be used for incremental build
help, not to produce a working build. This specific example was broken in
the meta build until r287905 since it does not run 'make depend'.
The gnu/lib/libreadline/readline case is fine since bsd.lib.mk has 'OBJS:
SRCS:M*.h' when there is no .depend file.
Sponsored by: EMC / Isilon Storage Division
MFC after: 1 week
routepr() (-r flag). It is too narrow to show an IPv6 prefix
in most cases.
- Accept "local" as a synonym of "unix" in protocol family name.
- Show a prefix length in CIDR notation when name resolution failed in
netname().
- Make routename() and netname() AF-independent and remove
unnecessary typecasting from struct sockaddr.
- Use getnameinfo(3) to format L2 addr in intpr().
- Fix a bug which showed "Address" when -A flag is specfied in pr_rthdr().
- Replace cryptic GETSA() macro with SA_SIZE().
- Fix declarations shadowing local variables with the same names.
- Add more static, remove unused header files and variables.
MFC after: 1 week
In the kernel, structs such as tcpstat are manipulated as an array of
counter_u64_t (uint64_t *), but made visible to userland as an array of
uint64_t. kread_counters() was previously copying the counter array into
user space and sequentially overwriting each counter with its value. This
mostly affects IPsec counters, as other counters are exported via sysctl.
PR: 201700
Tested by: Jason Unovitch
MFC after: 1 week
Update setkey and libipsec to understand aes-gcm-16 as an
encryption method.
A partial commit of the work in review D2936.
Submitted by: eri
Reviewed by: jmg
MFC after: 2 weeks
Sponsored by: Rubicon Communications (Netgate)
Off by default, build behaves normally.
WITH_META_MODE we get auto objdir creation, the ability to
start build from anywhere in the tree.
Still need to add real targets under targets/ to build packages.
Differential Revision: D2796
Reviewed by: brooks imp
o Restore historical behaviour of appending '*' if interface is down,
and we have enough space to print it (usually we don't). [1]
o Do not truncate interface names when printing in encoded format.
o Report interface flags into encoded format.
PR: 199873 [1]
Sponsored by: Nginx, Inc.
in 'netstat -r'.
The netstat/route.c was the last abuser of struct ifnet and struct
rtentry in the tree. With this change if_var.h can become kernel
only include, _WANT_RTENTRY can go away and projects/ifnet and
projects/routing can go forward.
Differential Revision: https://reviews.freebsd.org/D2242
Reviewed by: melifaro, gnn
Sponsored by: Nginx, Inc.
Sponsored by: Netflix
contain kernel pointers, and instead has interface index.
Bump __FreeBSD_version for that change.
o Now, netstat/mroute6.c no longer needs to kvm_read(3) struct ifnet, and
no longer needs to include if_var.h
Note that this change is far from being a complete move of IPv6 multicast
routing to a proper API. Other structures are still dumped into their
sysctls as is, requiring userland application to #define _KERNEL when
including ip6_mroute.h and then call kvm_read(3) to gather all bits and
pieces. But fixing this is out of scope of the opaque ifnet project.
Sponsored by: Nginx, Inc.
Sponsored by: Netflix
