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

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

Merge svn+ssh://svn.freebsd.org/base/head@207793

Update to current version of head.

Linux puts a blank line between each CPU.

Merge svn+ssh://svn.freebsd.org/base/head@206571

Re-apply r205683 with some modifications:
Fix some bogus values in linprocfs.

Submitted by: Petr Salinger <Petr.Salinger@seznam.cz>
Verified on: GNU/kFreeBSD debian 8.0-1-686 (by submitter)

Re-apply r205683 with some modifications:
Fix some bogus values in linprocfs.

Submitted by: Petr Salinger <Petr.Salinger@seznam.cz>
Verified on: GNU/kFreeBSD debian 8.0-1-686 (by submitter)
PR: 144584

Reviewed by / discussed with: kib, des, jhb, submitter

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Merge svn+ssh://svn.freebsd.org/base/head@205807

Revert r205683 to resolve some code quality issues which do not affect the
build or use of linprocfs, before committing the reworked patch again.

Requested by: des

Fix some bogus values in linprocfs.

Submitted by: Petr Salinger <Petr.Salinger@seznam.cz>
Verified on: GNU/kFreeBSD debian 8.0-1-686 (by submitter)
PR: 144584

Add missing Giant locking for the vfsconf list.

Submitted by: kib

Implement /proc/filesystems.

Submitted by: Fernando Apesteguia fernando.apesteguia (gmail)

Make /proc/self/fd `work'.

On Linux, /proc/<pid>/fd is comparable to fdescfs, where it allows you
to inspect the file descriptors used by each process. Glibc's ttyname()
works by performing a readli

Make /proc/self/fd `work'.

On Linux, /proc/<pid>/fd is comparable to fdescfs, where it allows you
to inspect the file descriptors used by each process. Glibc's ttyname()
works by performing a readlink() on these nodes, since all nodes in this
directory are symlinks.

It is a bit hard to implement this in linprocfs right now, so I am not
going to bother. Add a way to make ttyname(3) work, by adding a
/proc/<pid>/fd symlink, which points to /dev/fd only if the calling
process matches. When fdescfs is mounted, this will cause the
readlink() in ttyname() to fail, causing it to fall back on manually
finding a matching node in /dev.

Discussed on: emulation@

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Merge from head

Merge from head up to r188941 (last revision before the USB stack switch)

- MFC from head@196987

MFC r196635:

Fix a few panics in linuxulator + VIMAGE due to curvnet not being set.

This change affects only options VIMAGE builds.

Reviewed by: julian

Approved by: re (rwatson)

Fix a few panics in linuxulator + VIMAGE due to curvnet not being set.

This change affects only options VIMAGE builds.

Reviewed by: julian
MFC after: 3 days

- 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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Build on Jeff Roberson's linker-set based dynamic per-CPU allocator
(DPCPU), as suggested by Peter Wemm, and implement a new per-virtual
network stack memory allocator. Modify vnet to use the alloca

Build on Jeff Roberson's linker-set based dynamic per-CPU allocator
(DPCPU), as suggested by Peter Wemm, and implement a new per-virtual
network stack memory allocator. Modify vnet to use the allocator
instead of monolithic global container structures (vinet, ...). This
change solves many binary compatibility problems associated with
VIMAGE, and restores ELF symbols for virtualized global variables.

Each virtualized global variable exists as a "reference copy", and also
once per virtual network stack. Virtualized global variables are
tagged at compile-time, placing the in a special linker set, which is
loaded into a contiguous region of kernel memory. Virtualized global
variables in the base kernel are linked as normal, but those in modules
are copied and relocated to a reserved portion of the kernel's vnet
region with the help of a the kernel linker.

Virtualized global variables exist in per-vnet memory set up when the
network stack instance is created, and are initialized statically from
the reference copy. Run-time access occurs via an accessor macro, which
converts from the current vnet and requested symbol to a per-vnet
address. When "options VIMAGE" is not compiled into the kernel, normal
global ELF symbols will be used instead and indirection is avoided.

This change restores static initialization for network stack global
variables, restores support for non-global symbols and types, eliminates
the need for many subsystem constructors, eliminates large per-subsystem
structures that caused many binary compatibility issues both for
monitoring applications (netstat) and kernel modules, removes the
per-function INIT_VNET_*() macros throughout the stack, eliminates the
need for vnet_symmap ksym(2) munging, and eliminates duplicate
definitions of virtualized globals under VIMAGE_GLOBALS.

Bump __FreeBSD_version and update UPDATING.

Portions submitted by: bz
Reviewed by: bz, zec
Discussed with: gnn, jamie, jeff, jhb, julian, sam
Suggested by: peter
Approved by: re (kensmith)

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- MFC

After cleaning up rt_tables from vnet.h and cleaning up opt_route.h
a lot of files no longer need route.h either. Garbage collect them.
While here remove now unneeded vnet.h #includes as well.

Get vnets from creds instead of threads where they're available, and from
passed threads instead of curthread.

Reviewed by: zec, julian
Approved by: bz (mentor)

- Merge from HEAD