Commit Graph

307 Commits

Author SHA1 Message Date
Andriy Gapon
ca895af355 kvm_getprocs: gracefully handle errors from kvm_deadprocs
and don't confuse callers with incorrect return value

MFC after:	9 days
2012-10-06 20:16:04 +00:00
Andriy Gapon
9fb9ea1c03 kvm_proclist: ignore processes in larvae state
Reviewed by:	jhb
MFC after:	8 days
2012-10-06 20:12:24 +00:00
Kevin Lo
bedceb7c9c If the IdlePDPT is not present, PAE is not active 2012-09-10 08:16:45 +00:00
Glen Barber
a3fb6da9ba General mdoc(7) and typo fixes.
PR:		167734
Submitted by:	Nobuyuki Koganemaru (kogane!jp.freebsd.org)
MFC after:	3 days
2012-05-11 20:06:46 +00:00
Mikolaj Golub
767993ec97 Try to avoid ambiguity when sysctl returns ENOMEM additionally
checking the returned oldlen: when ENOMEM is due to the supplied
buffer being too short the return oldlen is equal to buffer size.

Without this additional check kvm_getprocs() gets stuck in loop if the
returned ENOMEM was due the exceeded memorylocked limit. This is
easily can be observed running `limits -l 1k top'.

Submitted by:	Andrey Zonov <andrey zonov org>
MFC after:	1 week
2012-02-01 18:02:13 +00:00
Mikolaj Golub
952a0c3eed In kvm_argv(), the case when the supplied buffer was too short to hold the
requested value was handled incorrectly, and the function retuned NULL
instead of the truncated result.

Fix this and also remove unnecessary check for buf != NULL, which alway
retuns true.

MFC after:	3 days
2012-01-15 18:51:07 +00:00
Mikolaj Golub
ee5169dc9d Now kvm_getenvv() and kvm_getargv() don't need procfs(5).
MFC after:	2 weeks
2011-11-22 21:12:28 +00:00
Marcel Moolenaar
d69bc9bcbe Add support for PBVM addresses. In a nutshell this means:
o   get the physical address and size of the PBVM page table. This
    can be found in the bootinfo structure, of which the physical
    address is recorded as the ELF entry point.
o   translate region 4 virtual addresses to physical addresses using
    the PBVM page table.

In _kvm_kvatop() make the distinction between physical address and
core file offset a little clearer to avoid confusion. To further
enhance readability, always store the translated address into pa
so that it's obvious how the translation from va to pa happened.

Approved by:	re (blanket)
2011-08-06 15:59:54 +00:00
Bjoern A. Zeeb
925af54487 Rename ki_ocomm to ki_tdname and OCOMMLEN to TDNAMLEN.
Provide backward compatibility defines under BURN_BRIDGES.

Suggested by:	jhb
Reviewed by:	emaste
Sponsored by:	Sandvine Incorporated
Approved by:	re (kib)
2011-07-18 20:06:15 +00:00
Attilio Rao
a2f4e284b0 Completely remove now unused pc_other_cpus, pc_cpumask.
Tested by:	pluknet
2011-07-04 10:45:54 +00:00
Attilio Rao
1de471dfee Revert r222363, as bde@ pointed out the initial solution was far more
correct.
2011-05-31 20:59:53 +00:00
Attilio Rao
d361ed4b1c Style fix: cast to size_t rather than u_long when comparing to sizeof()
rets.

Requested by:	kib
2011-05-27 16:01:51 +00:00
Attilio Rao
d5880f9cdf In the near future cpuset_t objects in struct pcpu will be axed out, but
as long as this does not happen, we need to fix interfaces to userland
in order to not break run-time accesses to the structure.

Reviwed by:	kib
Tested by:	pluknet
2011-05-27 15:50:14 +00:00
Attilio Rao
4b547324c0 Disconnect sun4v architecture from the three.
Some files keep the SUN4V tags as a code reference, for the future,
if any rewamped sun4v support wants to be added again.

Reviewed by:	marius
Tested by:	sbruno
Approved by:	re
2011-05-14 01:53:38 +00:00
Ulrich Spörlein
948db0b9e9 libkvm: fix logic inversion introduced with last commit
Reported by:	Brandon Gooch <jamesbrandongooch@gmail.com>
Pointy hat to:	uqs
2011-02-02 17:01:26 +00:00
Ulrich Spörlein
6ee6ac7fec libkvm: Unbreak build for powerpc64/powerpc
This slipped through my testing due to the recent roto-tiling of the
ARCH/TARGET parts that I need to catch up with. Mea culpa.
2011-01-24 11:06:40 +00:00
Ulrich Spörlein
de788839e2 libkvm: fix process runtime calculation on crashdumps
Fix a long standing bug, where the procs ticks where assumed to be in
us. Instead, read cpu_tick_frequency from the kernel and use the same
logic to convert runtime. This is still too optimistic in that it
assumes cpu_tick_frequency is available and fixed. Since this function
is only called on crashdumps, I think we can live with that. Testing has
shown the values to be correct for different kern.hz inside Virtualbox.

Bump WARNS. Alignment issues on some archs mean this is still at 3.

Reviewed by:	bde
2011-01-23 11:08:36 +00:00
Ulrich Spörlein
c10970dd7d libkvm code janitoring
- make WARNS=6 clean for archs w/o strict alignment requirments
- add const, ANSIfy, remove unused vars, cast types for comparison
- thanks to differing definitions of VM_MIN_ADDRESS across our archs, we
  need to trick the compiler to not complain about signedness. We could
  either fix VM_MIN_ADDRESS to always be a simple integer or make the
  check conditional on $ARCH.

Closes PRs:	kern/42386, kern/83364
Reviewed by:	bde
2011-01-23 11:08:28 +00:00
Ulrich Spörlein
20a95cd6fc Revert most of r210764, now that mdocml does the right
thing with empty quotation macros.

Requested by:	Alex Kozlov
2010-12-28 10:08:50 +00:00
Dimitry Andric
5f67450d3a Similar to sys/net/vnet.h, define the linker set name for sys/sys/pcpu.h
as a macro, and use it instead of literal strings.
2010-11-14 20:14:25 +00:00
Andriy Gapon
290e14f881 amd64: introduce minidump version 2
After KVA space was increased to 512GB on amd64 it became impractical
to use PTEs as entries in the minidump map of dumped pages, because size
of that map alone would already be 1GB.
Instead, we now use PDEs as page map entries and employ two stage lookup
in libkvm: virtual address -> PDE -> PTE -> physical address.  PTEs are
now dumped as regular pages.  Fixed page map size now is 2MB.

libkvm keeps support for accessing amd64 minidumps of version 1.
Support for 1GB pages is added.

Many thanks to Alan Cox for his guidance, numerous reviews, suggestions,
enhancments and corrections.

Reviewed by:	alc [kernel part]
MFC after:	15 days
2010-11-11 18:35:28 +00:00
Oleksandr Tymoshenko
99b7f1da55 Add minidump support for MIPS 2010-11-07 03:26:22 +00:00
Nathan Whitehorn
b12277d1d4 Repair some build breakage introduced in r211725 and garbage collect some
code made obsolete in the same commit.
2010-08-28 15:03:11 +00:00
Warner Losh
25faff346c MFtbemd:
Prefer MACHNE_CPUARCH to MACHINE_ARCH in most contexts where you want
to test of all the CPUs of a given family conform.
2010-08-23 22:24:11 +00:00
Ulrich Spörlein
c0da74038d mdoc: make sure to pass at least one argument to quotation macros 2010-08-02 13:11:35 +00:00
Nathan Whitehorn
b5d529643a 64-bit PowerPC KVM support. 2010-07-10 15:15:00 +00:00
Sean Bruno
5f494640de Much closer approximation of the kernel's calculation of this value.
Reviewed by:	alc
Obtained from:	Yahoo Inc.
2010-06-18 01:17:16 +00:00
Jilles Tjoelker
886ae81fa3 kvm(3): Mention that some of the functions use sysctl(3) instead of kmem.
Additionally, because of sysctl(3) use (which is generally good), behaviour
for crash dumps differs slightly from behaviour for live kernels and this
will probably never be fixed entirely, so weaken that claim.

MFC after:	1 week
2010-04-25 12:50:30 +00:00
Ulrich Spörlein
63d46d1d5e Fix several typos in macros or macro misusage.
Found by:	make manlint
Reviewed by:	ru
Approved by:	philip (mentor)
2010-03-12 10:01:06 +00:00
Robert Watson
57a6239f94 Not all programs including kvm.h include the necessary headers to use
u_int, so prefer unsigned int.

MFC after:	6 days
Pointed out by:	bz, kib, Mr Tinderbox
2010-03-01 09:46:27 +00:00
Robert Watson
ccd8bad0bb A first cut at teaching libkvm how to deal with dynamic per-CPU storage
(DPCPU):

A new API, kvm_dpcpu_setcpu(3), selects the active CPU for the purposes
of DPCPU.  Calls to kvm_nlist(3) will automatically translate DPCPU
symbols and return a pointer to the current CPU's version of the data.
Consumers needing to read the same symbol on several CPUs will invoke a
series of setcpu/nlist calls, one per CPU of interest.

This addition makes it possible for tools like netstat(1) to query the
values of DPCPU variables during crashdump analysis, and is based on
similar code handling virtualized global variables.

MFC after:	1 week
Sponsored by:	Juniper Networks, Inc.
2010-03-01 00:27:55 +00:00
Robert Watson
f0506e896f Fix typo in comment.
MFC after:	3 days
2010-02-27 21:58:55 +00:00
Ed Schouten
daaf575910 Build lib/ with WARNS=6 by default.
Similar to libexec/, do the same with lib/. Make WARNS=6 the norm and
lower it when needed.

I'm setting WARNS?=0 for secure/. It seems secure/ includes the
Makefile.inc provided by lib/. I'm not going to touch that directory.
Most of the code there is contributed anyway.
2010-01-02 09:58:07 +00:00
Brooks Davis
68a5cc39d3 Add a missing else that negated the truncation of ki_ngroups to
NGROUPS.

Submitted by:	Dmitry Pryanishnikov <lynx dot ripe at gmail dot com>
2009-12-10 21:16:16 +00:00
John Baldwin
50c3239e85 Fix a copy-paste bug when reading data from the last 3 (7 for PAE) bytes of
a page mapped by a large page in the kernel.

Submitted by:	Dorr H. Clark  dclark of engr.scu.edu
MFC after:	1 week
2009-11-06 13:10:12 +00:00
Brooks Davis
d534b0c238 cr_groups is no longer embedded in struct ucred and is instead stored
in a seperate array.  As such we need to use kvm_read rather than bcopy
to populate the ki_groups field.

This fixes a crash when running ps -ax on a coredump.

Reported by:	brucec
Tested by:	brucec
MFC after:	3 days
2009-09-08 19:37:59 +00:00
Bjoern A. Zeeb
87a61ebd4c Rather than replicating the maths from the kernel, use the
value the kernel calculated directly as we already read it
with struct vnet.  This will make kvm_vnet.c more resilent
in case of possible kernel changes.

Reviewed by:	rwatson
Approved by:	re (kib)
2009-08-13 14:59:04 +00:00
Robert Watson
530c006014 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)
2009-08-01 19:26:27 +00:00
Brooks Davis
1b5768be71 Revert the changes to struct kinfo_proc in r194498. Instead, fill
in up to 16 (KI_NGROUPS) values and steal a bit from ki_cr_flags
(all bits currently unused) to indicate overflow with the new flag
KI_CRF_GRP_OVERFLOW.

This fixes procstat -s.

Approved by: re (kib)
2009-07-24 15:03:10 +00:00
Bjoern A. Zeeb
7cf8b4b933 Make libkvm work on live systems and crashdumps with and
without VIMAGE virtualization in the kernel.

If we cannot resolve a symbol try to see if we can find it with
prefix of the virtualized subsystem, currently only "vnet_entry"
by identifying either the vnet of the current process for a
live system or the vnet of proc0 (or of dumptid if compiled
in a non-default way).

The way this is done currently allows us to only touch libkvm
but no single application. Once we are going to virtualize more
subsystems we will have to review this decision for better scaling.

Submitted by:	rwatson (initial version of kvm_vnet.c, lots of ideas)
Reviewed by:	rwatson
Approved by:	re (kib)
2009-07-23 21:12:21 +00:00
Brooks Davis
838d985825 Rework the credential code to support larger values of NGROUPS and
NGROUPS_MAX, eliminate ABI dependencies on them, and raise the to 1024
and 1023 respectively.  (Previously they were equal, but under a close
reading of POSIX, NGROUPS_MAX was defined to be too large by 1 since it
is the number of supplemental groups, not total number of groups.)

The bulk of the change consists of converting the struct ucred member
cr_groups from a static array to a pointer.  Do the equivalent in
kinfo_proc.

Introduce new interfaces crcopysafe() and crsetgroups() for duplicating
a process credential before modifying it and for setting group lists
respectively.  Both interfaces take care for the details of allocating
groups array. crsetgroups() takes care of truncating the group list
to the current maximum (NGROUPS) if necessary.  In the future,
crsetgroups() may be responsible for insuring invariants such as sorting
the supplemental groups to allow groupmember() to be implemented as a
binary search.

Because we can not change struct xucred without breaking application
ABIs, we leave it alone and introduce a new XU_NGROUPS value which is
always 16 and is to be used or NGRPS as appropriate for things such as
NFS which need to use no more than 16 groups.  When feasible, truncate
the group list rather than generating an error.

Minor changes:
  - Reduce the number of hand rolled versions of groupmember().
  - Do not assign to both cr_gid and cr_groups[0].
  - Modify ipfw to cache ucreds instead of part of their contents since
    they are immutable once referenced by more than one entity.

Submitted by:	Isilon Systems (initial implementation)
X-MFC after:	never
PR:		bin/113398 kern/133867
2009-06-19 17:10:35 +00:00
Ed Schouten
953e4134b5 Fix missing includes of <string.h>, to silence some compiler warnings.
Submitted by:	Pawel Worach
2009-06-14 12:42:06 +00:00
Marcel Moolenaar
a5a8dffc5b Add support for PowerPC kernel core files. This commit only adds
support for virtual core files (aka minidumps). physical core
files are not supported.

The implementation is cross-tool ready and can be used in a non-
powerpc hosted debugger to analyze PowerPC core files. It also
accepts core files that still have the dump header, as can be
the case within Juniper where TFTP-based kernel core files are
supported and savecore is not used to "extract" the core file
from some dump device.

Obtained from:	Juniper Networks, Inc.
2009-04-06 21:52:10 +00:00
Bjoern A. Zeeb
413628a7e3 MFp4:
Bring in updated jail support from bz_jail branch.

This enhances the current jail implementation to permit multiple
addresses per jail. In addtion to IPv4, IPv6 is supported as well.
Due to updated checks it is even possible to have jails without
an IP address at all, which basically gives one a chroot with
restricted process view, no networking,..

SCTP support was updated and supports IPv6 in jails as well.

Cpuset support permits jails to be bound to specific processor
sets after creation.

Jails can have an unrestricted (no duplicate protection, etc.) name
in addition to the hostname. The jail name cannot be changed from
within a jail and is considered to be used for management purposes
or as audit-token in the future.

DDB 'show jails' command was added to aid debugging.

Proper compat support permits 32bit jail binaries to be used on 64bit
systems to manage jails. Also backward compatibility was preserved where
possible: for jail v1 syscalls, as well as with user space management
utilities.

Both jail as well as prison version were updated for the new features.
A gap was intentionally left as the intermediate versions had been
used by various patches floating around the last years.

Bump __FreeBSD_version for the afore mentioned and in kernel changes.

Special thanks to:
- Pawel Jakub Dawidek (pjd) for his multi-IPv4 patches
  and Olivier Houchard (cognet) for initial single-IPv6 patches.
- Jeff Roberson (jeff) and Randall Stewart (rrs) for their
  help, ideas and review on cpuset and SCTP support.
- Robert Watson (rwatson) for lots and lots of help, discussions,
  suggestions and review of most of the patch at various stages.
- John Baldwin (jhb) for his help.
- Simon L. Nielsen (simon) as early adopter testing changes
  on cluster machines as well as all the testers and people
  who provided feedback the last months on freebsd-jail and
  other channels.
- My employer, CK Software GmbH, for the support so I could work on this.

Reviewed by:	(see above)
MFC after:	3 months (this is just so that I get the mail)
X-MFC Before:   7.2-RELEASE if possible
2008-11-29 14:32:14 +00:00
Rafal Jaworowski
8e321b7943 Support kernel crash mini dumps on ARM architecture.
Obtained from:	Juniper Networks, Semihalf
2008-11-06 16:20:27 +00:00
Xin LI
01c56ef230 Reduce code duplication: use calloc() intead of malloc()
and memset afterward.
2008-10-17 20:11:28 +00:00
Xin LI
b7f8e2dab3 _kvm_malloc allocates memory through calloc() which
returns zeroed memory, so don't redo the initialization.
2008-10-17 20:09:00 +00:00
John Baldwin
cd11f01e4a Add a "CACHING" section regarding the internal caching of kernel variables
and the ability to clear that cache.
2008-08-21 19:22:13 +00:00
John Baldwin
f110b23b7d Add a new routine kvm_getcptime(3) for fetching the equivalent of
'kern.cp_time'.  For a live kernel it uses the sysctl.  For a crashdump,
it first checks to see if the kernel has a 'cp_time' global symbol.  If
it does, it uses that.  If that doesn't work, when it uses the recently
added kvm_getmaxcpu(3) and kvm_getpcpu(3) routines to walk all the CPUs
and sum up their counters.

MFC after:	1 week
2008-08-19 21:30:36 +00:00
John Baldwin
794a9a6c96 Add two new routines to libkvm for working with per-CPU data:
kvm_getmaxcpu() and kvm_getpcpu().

MFC after:	1 week
2008-08-19 19:55:33 +00:00