Add procfs to jail-mountable filesystems.

Reviewed by: jamie
MFC after: 1 week

IFC @230489 (pending review).

Abrogate nchr argument in proc_getargv() and proc_getenvv(): we always want
to read strings completely to know the actual size.

As a side effect it fixes the issue with kern.proc.args and kern.proc.

Abrogate nchr argument in proc_getargv() and proc_getenvv(): we always want
to read strings completely to know the actual size.

As a side effect it fixes the issue with kern.proc.args and kern.proc.env
sysctls, which didn't return the size of available data when calling
sysctl(3) with the NULL argument for oldp.

Note, in get_ps_strings(), which does actual work for proc_getargv() and
proc_getenvv(), we still have a safety limit on the size of data read in
case of a corrupted procces stack.

Suggested by: kib
MFC after: 3 days

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IFC to head to catch up the bhyve branch

Approved by: grehan@

Protect process environment variables with p_candebug().

Discussed with: jilles, kib, rwatson
MFC after: 2 weeks

Retire linprocfs_doargv(). Instead use new functions, proc_getargv()
and proc_getenvv(), which were implemented using linprocfs_doargv() as
a reference.

Suggested by: kib
Reviewed by: kib
Approved b

Retire linprocfs_doargv(). Instead use new functions, proc_getargv()
and proc_getenvv(), which were implemented using linprocfs_doargv() as
a reference.

Suggested by: kib
Reviewed by: kib
Approved by: des (linprocfs maintainer)
MFC after: 2 weeks

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IFC @ r225592

sys/dev/bvm/bvm_console.c - move up to the new alt-break order.

Integrate FreeBSD/head into projects/zfsd/head as of SVN revision 224870.

Implement the linprocfs swaps file, providing information about the
configured swap devices in the Linux-compatible format.

Based on the submission by: Robert Millan <rmh debian org>
PR: kern/159281

Implement the linprocfs swaps file, providing information about the
configured swap devices in the Linux-compatible format.

Based on the submission by: Robert Millan <rmh debian org>
PR: kern/159281
Reviewed by: bde
Approved by: re (kensmith)
MFC after: 2 weeks

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Integrate from Head into ZFSD feature branch as of revision r224141.

IFC @ r222830

MFC

Return empty cmdline/environ string for processes with kernel address
space. This is consistent with the behavior in linux.

PR: kern/157871
Reported by: Petr Salinger <Petr Salinger att seznam cz>

Return empty cmdline/environ string for processes with kernel address
space. This is consistent with the behavior in linux.

PR: kern/157871
Reported by: Petr Salinger <Petr Salinger att seznam cz>
Verified on: GNU/kFreeBSD debian 8.2-1-amd64 (by reporter)
Reviewed by: kib (some time ago)
MFC after: 2 weeks

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Use atomic load & store for TSC frequency. It may be overkill for amd64 but
safer for i386 because it can be easily over 4 GHz now. More worse, it can
be easily changed by user with 'machdep.tsc_fr

Use atomic load & store for TSC frequency. It may be overkill for amd64 but
safer for i386 because it can be easily over 4 GHz now. More worse, it can
be easily changed by user with 'machdep.tsc_freq' tunable (directly) or
cpufreq(4) (indirectly). Note it is intentionally not used in performance
critical paths to avoid performance regression (but we should, in theory).
Alternatively, we may add "virtual TSC" with lower frequency if maximum
frequency overflows 32 bits (and ignore possible incoherency as we do now).

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Fix some locking nits with the p_state field of struct proc:
- Hold the proc lock while changing the state from PRS_NEW to PRS_NORMAL
in fork to honor the locking requirements. While here, expand

Fix some locking nits with the p_state field of struct proc:
- Hold the proc lock while changing the state from PRS_NEW to PRS_NORMAL
in fork to honor the locking requirements. While here, expand the scope
of the PROC_LOCK() on the new process (p2) to avoid some LORs. Previously
the code was locking the new child process (p2) after it had locked the
parent process (p1). However, when locking two processes, the safe order
is to lock the child first, then the parent.
- Fix various places that were checking p_state against PRS_NEW without
having the process locked to use PROC_LOCK(). Every place was already
locking the process, just after the PRS_NEW check.
- Remove or reduce the use of PROC_SLOCK() for places that were checking
p_state against PRS_NEW. The PROC_LOCK() alone is sufficient for reading
the current state.
- Reorder fill_kinfo_proc() slightly so it only acquires PROC_SLOCK() once.

MFC after: 1 week

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Merge svn+ssh://svn.freebsd.org/base/head@218816

Update interface stats counters to match the current format in linux and
try to export as much information as we can match.

Requested on: Debian GNU/kFreeBSD list (debian-bsd lists.debian.org) 2010-

Update interface stats counters to match the current format in linux and
try to export as much information as we can match.

Requested on: Debian GNU/kFreeBSD list (debian-bsd lists.debian.org) 2010-12
Tested by: Mats Erik Andersson (mats.andersson gisladisker.se)
MFC after: 10 days

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Add macro to test the sv_flags of any process. Change some places to test
the flags instead of explicit comparing with address of known sysentvec
structures.

MFC after: 1 month

svn+ssh://svn.freebsd.org/base/head@216199

Sync: merge r214895 through r215140 from ^/head.

Break long line.

Fix CPU ID in /proc/cpuinfo.

PR: kern/56451
Submitted by: arundel@
MFC after: 3 weeks

Merge svn+ssh://svn.freebsd.org/base/head@214309

In linprocfs_doargv():
- handle compat32 processes;
- remove the checks for copied in addresses to belong into valid
usermode range, proc_rwmem() does this;
- simplify loop reading single string, l

In linprocfs_doargv():
- handle compat32 processes;
- remove the checks for copied in addresses to belong into valid
usermode range, proc_rwmem() does this;
- simplify loop reading single string, limit the total amount of strings
collected by ARG_MAX bytes;
- correctly add '\0' at the end of each copied string;
- fix style.

In linprocfs_doprocenviron():
- unlock the process before calling copyin code [1]. The process is held
by pseudofs.

In linprocfs_doproccmdline:
- use linprocfs_doargv() to handle !curproc case for which p_args is not cached.

Reported by: plulnet [1]
Tested by: pluknet
Approved by: des (linprocfs maintainer, previous
version of the patch)
MFC after: 3 weeks

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Implement proc/$$/environment.

Submitted by: Fernando Apesteguía <fernando.apesteguia@gmail.com>
MFC after: 3 weeks