src/sys/compat/linux/linux_mib.h, branch releng/7.3

Merge r191883,191966,191973 from HEAD to stable/7:

2009-05-28T18:26:18+00:00

Linux exports HZ value to user space via AT_CLKTCK auxiliary vector
entry since 2.4.0.
Being exported, AT_CLKTCK is returned by sysconf(_SC_CLK_TCK),
glibc falls back to the hard-coded CLK_TCK value when aux entry
is not present.

Glibc versions prior to 2.2.1 always use hard-coded CLK_TCK value.

For older applications/libc's which depends on hard-coded CLK_TCK
value user should set compat.linux.osrelease less than 2.4.0.

linux_times() shall use the value that is exported to user space.

PR:		kern/134251
Approved by:	kib (mentor)

Merge r191972 from HEAD to stable/7:

2009-05-28T04:00:03+00:00

Introduce linux_kernver() interface which is intended for an exact
designation of the emulated kernel version.

linux_kernver() returns integer value formatted as 'VVVMMMIII' where
VVV - version, MMM - major revision, III - minor revision.

Approved by:	kib (mentor)

MFp4 (111746+):

2006-12-31T12:39:10+00:00

  Redo the checking for 2.6 emulation. We now cache the value of
  use26 and replace calls to linux_get_osrelease() + parsing with
  a call to linux_use26(). Typical path is lockless now.

  Pointed out by: kib

This allows to ship RELENG_7_0 with a default osrelease of 2.4.2 and the
possibility to enable 2.6.x emulation without the possible performance
impact of the previous version of the check.

Submitted by:	rdivacky

Remove linux_mib_destroy() (which I actually added in between 5.0 and 5.1)

2005-12-15T16:30:41+00:00

which existed to cleanup the linux_osname mutex.  Now that MTX_SYSINIT()
has grown a SYSUNINIT to destroy mutexes on unload, the extra destroy here
was redundant and resulted in panics in debug kernels.

MFC after:	1 week
Reported by:	Goran Gajic ggajic at afrodita dot rcub dot bg dot ac dot yu

Add a cleanup function to destroy the osname_lock and call it on module

2003-03-26T18:29:44+00:00

unload.

Submitted by:	gallatin
Reported by:	Martin Karlsson

- Change the linux_[gs]et_os{name, release, s_version}() functions to

2003-03-13T22:45:43+00:00

  take a thread instead of a proc for their first argument.
- Add a mutex to protect the system-wide Linux osname, osrelease, and
  oss_version variables.
- Change linux_get_prison() to take a thread instead of a proc for its
  first argument and to use td_ucred rather than p_ucred.  This is ok
  because a thread's prison does not change even though it's ucred might.
- Also, change linux_get_prison() to return a struct prison * instead of
  a struct linux_prison * since it returns with the struct prison locked
  and this makes it easier to safely unlock the prison when we are done
  messing with it.

Fixed some style bugs in the removal of P(()). Tabs before "P(("

2002-03-24T04:04:50+00:00

were not removed.

Remove __P.

2002-03-20T05:48:58+00:00

o Introduce pr_mtx into struct prison, providing protection for the

2001-12-03T16:12:27+00:00

  mutable contents of struct prison (hostname, securelevel, refcount,
  pr_linux, ...)
o Generally introduce mtx_lock()/mtx_unlock() calls throughout kern/
  so as to enforce these protections, in particular, in kern_mib.c
  protection sysctl access to the hostname and securelevel, as well as
  kern_prot.c access to the securelevel for access control purposes.
o Rewrite linux emulator abstractions for accessing per-jail linux
  mib entries (osname, osrelease, osversion) so that they don't return
  a pointer to the text in the struct linux_prison, rather, a copy
  to an array passed into the calls.  Likewise, update linprocfs to
  use these primitives.
o Update in_pcb.c to always use prison_getip() rather than directly
  accessing struct prison.

Reviewed by:	jhb

Fix typo in license.

2000-08-25T07:32:24+00:00