Commit Graph

203 Commits

Author SHA1 Message Date
Maxim Sobolev
996358f55c Always produce cpuX entries, even in the case when there is only one CPU
in the system. This is consistent with what real linuxes do.

PR:		kern/75848
Submitted by:	Andriy Gapon <avg@icyb.net.ua>
MFC after:	3 days
2005-03-06 22:28:14 +00:00
David E. O'Brien
1997c537be Match the LINUX32's style with existing style
Submitted by:	Jung-uk Kim <jkim@niksun.com>

Use positive, not negative logic.
2005-01-14 04:44:56 +00:00
Warner Losh
898b0535b7 Start each of the license/copyright comments with /*- 2005-01-05 22:34:37 +00:00
Colin Percival
691b3b0df9 Fix unvalidated pointer dereference. This is FreeBSD-SA-04:17.procfs. 2004-12-01 21:33:02 +00:00
Poul-Henning Kamp
7689860fd5 Pick up the inode number using VOP_GETATTR() rather than caching it
in all vnodes on the off chance that linprocfs needs it.  If we can afford
to call vn_fullpath() we can afford the much cheaper VOP_GETATTR().
2004-11-10 07:25:37 +00:00
Tim J. Robbins
84880f87d0 Add support for 32-bit Linux binary emulation on amd64:
- include <machine/../linux32/linux.h> instead of <machine/../linux/linux.h>
  if building with the COMPAT_LINUX32 option.
- make minimal changes to the i386 linprocfs_docpuinfo() function to support
  amd64. We return a fake CPU family of 6 for now.
2004-08-16 08:19:18 +00:00
Pawel Jakub Dawidek
c5b7c33bc8 Remove ps_argsopen from this check, because of two reasons:
1. This check if wrong, because it is true by default
   (kern.ps_argsopen is 1 by default) (p_cansee() is not even checked).
2. Sysctl kern.ps_argsopen is going away.
2004-04-01 00:04:23 +00:00
Dag-Erling Smørgrav
38efe50cbd Remove VFS_STATFS() call which violated the lock order and wasn't
really required anyway.

PR:		kern/61994
Submitted by:	Bjoern Groenvall <bg@sics.se>
2004-02-09 20:33:42 +00:00
Robert Watson
09dbf7a214 Correct for proper vn_fullpath() failure mode: "== -1" -> "!= 0"
Discussed with:	des
2004-01-12 03:14:37 +00:00
Alan Cox
277b62040d Lock the traversal of the vm object list. Use TAILQ_FOREACH consistently. 2004-01-02 19:29:31 +00:00
Dag-Erling Smørgrav
3f907e34d7 Use mp_ncpus instead of the hw.ncpu sysctl. 2003-12-07 17:38:20 +00:00
Olivier Houchard
c92dcdd99c Various style and type fixes in my last commit.
Suggested by:	mux
2003-10-20 04:10:20 +00:00
Olivier Houchard
faf1e14786 Implement partially /proc/<pid>/maps.
It looks enough to make SImics run.

Reviewed by:	des
2003-10-19 14:13:51 +00:00
Andrew Gallatin
1827b9e9c9 make kernel_sysctl()'s args match its prototype in order to fix the
alpha build
2003-10-08 18:05:59 +00:00
Dag-Erling Smørgrav
7ea97b6027 Fix a (fortunately harmless) signed / unsigned bug. 2003-09-30 13:35:19 +00:00
Dag-Erling Smørgrav
e705f0f0f9 Previous commit contained too-smart-for-its-own-good code that might
produce incorrect (though harmless) output on single-CPU systems.
2003-09-22 16:05:11 +00:00
Dag-Erling Smørgrav
e54c4ad8ac Fake multi-cpu statistics for proc/stat by dividing the totals by the
number of CPUs.

PR:		kern/27522
2003-09-22 15:52:32 +00:00
Dag-Erling Smørgrav
7d10d0554c Fix some broken comments. 2003-09-09 19:22:55 +00:00
Dag-Erling Smørgrav
0dd872f5bb Add cwd, root and statm (modeled on a 2.4.20 kernel). De-obfuscate
linprocfs_init() a little and remove some gratuitous whitespace.
2003-09-09 08:19:06 +00:00
Dag-Erling Smørgrav
9a69494e8b Whitespace cleanup. 2003-08-18 13:30:15 +00:00
Marcel Moolenaar
3e25ce2310 Cleanup <machine/cpu.h> by moving MD prototypes to <machine/md_var.h>
like we have on other platforms. Move savectx() to <machine/pcb.h>.
A lot of files got these MD prototypes through the indirect inclusion
of <machine/cpu.h> and now need to include <machine/md_var.h>. The
number of which is unexpectedly large...

osf1_misc.c especially is tricky because szsigcode is redefined in
one of the osf1 header files. Reordering of the include files was
needed.

linprocfs.c now needs an explicit extern declaration.

Tested with: LINT
2003-08-17 06:42:08 +00:00
Dag-Erling Smørgrav
bccbc20f63 Add support for multiple CPUs to cpuinfo. 2003-08-04 10:55:22 +00:00
Poul-Henning Kamp
567104a148 Add a new function swap_pager_status() which reports the total size of the
paging space and how much of it is in use (in pages).

Use this interface from the Linuxolator instead of groping around in the
internals of the swap_pager.
2003-07-18 10:26:09 +00:00
David E. O'Brien
16dbc7f228 Use __FBSDID(). 2003-06-10 21:29:12 +00:00
John Baldwin
90af4afacb - Merge struct procsig with struct sigacts.
- Move struct sigacts out of the u-area and malloc() it using the
  M_SUBPROC malloc bucket.
- Add a small sigacts_*() API for managing sigacts structures: sigacts_alloc(),
  sigacts_free(), sigacts_copy(), sigacts_share(), and sigacts_shared().
- Remove the p_sigignore, p_sigacts, and p_sigcatch macros.
- Add a mutex to struct sigacts that protects all the members of the struct.
- Add sigacts locking.
- Remove Giant from nosys(), kill(), killpg(), and kern_sigaction() now
  that sigacts is locked.
- Several in-kernel functions such as psignal(), tdsignal(), trapsignal(),
  and thread_stopped() are now MP safe.

Reviewed by:	arch@
Approved by:	re (rwatson)
2003-05-13 20:36:02 +00:00
John Baldwin
418e9d1b9e P_SHOULDSTOP used to be p_stat == SSTOP and needed the sched_lock, now it
is protected by the proc lock and doesnt' need sched_lock, so adjust the
locking appropriately.
2003-04-17 21:58:45 +00:00
John Baldwin
4bedc36141 Fix multiple printf warnings on Alpha:
- Prefer long long to quad_t to match printf args.
- Use uintmax_t and %j to print segsz_t and vm_size_t values.
- Fix others in Alpha-specific code.
2003-04-16 19:46:26 +00:00
John Baldwin
b62f75cf44 - Change the linux_[gs]et_os{name, release, s_version}() functions to
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.
2003-03-13 22:45:43 +00:00
Poul-Henning Kamp
f341ca9891 Remove #include <sys/dkstat.h> 2003-02-16 14:13:23 +00:00
Jeffrey Hsu
b30a244c34 SMP locking for ifnet list. 2002-12-22 05:35:03 +00:00
Julian Elischer
1dab89f156 Remove the process state PRS_WAIT.
It is never used. I left it there from pre-KSE days as I didn't know
if I'd need it or not but now I know I don't.. It's functionality
is in TDI_IWAIT in the thread.
2002-10-21 22:27:36 +00:00
Juli Mallett
1d9c56964d Back our kernel support for reliable signal queues.
Requested by:	rwatson, phk, and many others
2002-10-01 17:15:53 +00:00
Juli Mallett
1226f694e6 First half of implementation of ksiginfo, signal queues, and such. This
gets signals operating based on a TailQ, and is good enough to run X11,
GNOME, and do job control.  There are some intricate parts which could be
more refined to match the sigset_t versions, but those require further
evaluation of directions in which our signal system can expand and contract
to fit our needs.

After this has been in the tree for a while, I will make in kernel API
changes, most notably to trapsignal(9) and sendsig(9), to use ksiginfo
more robustly, such that we can actually pass information with our
(queued) signals to the userland.  That will also result in using a
struct ksiginfo pointer, rather than a signal number, in a lot of
kern_sig.c, to refer to an individual pending signal queue member, but
right now there is no defined behaviour for such.

CODAFS is unfinished in this regard because the logic is unclear in
some places.

Sponsored by:	New Gold Technology
Reviewed by:	bde, tjr, jake [an older version, logic similar]
2002-09-30 20:20:22 +00:00
Jake Burkholder
05ba50f522 Use the fields in the sysentvec and in the vm map header in place of the
constants VM_MIN_ADDRESS, VM_MAXUSER_ADDRESS, USRSTACK and PS_STRINGS.
This is mainly so that they can be variable even for the native abi, based
on different machine types.  Get stack protections from the sysentvec too.
This makes it trivial to map the stack non-executable for certain abis, on
machines that support it.
2002-09-21 22:07:17 +00:00
Julian Elischer
71fad9fdee Completely redo thread states.
Reviewed by:	davidxu@freebsd.org
2002-09-11 08:13:56 +00:00
Julian Elischer
e602ba25fd Part 1 of KSE-III
The ability to schedule multiple threads per process
(one one cpu) by making ALL system calls optionally asynchronous.
to come: ia64 and power-pc patches, patches for gdb, test program (in tools)

Reviewed by:	Almost everyone who counts
	(at various times, peter, jhb, matt, alfred, mini, bernd,
	and a cast of thousands)

	NOTE: this is still Beta code, and contains lots of debugging stuff.
	expect slight instability in signals..
2002-06-29 17:26:22 +00:00
John Baldwin
f44d9e24fb Change p_can{debug,see,sched,signal}()'s first argument to be a thread
pointer instead of a proc pointer and require the process pointed to
by the second argument to be locked.  We now use the thread ucred reference
for the credential checks in p_can*() as a result.  p_canfoo() should now
no longer need Giant.
2002-05-19 00:14:50 +00:00
John Baldwin
590ae816c2 - p_cansee() needs the target process locked.
- We need the proc lock held for more of procfs_doprocstatus().
2002-04-13 23:09:41 +00:00
John Baldwin
65c9b4303b - Change fill_kinfo_proc() to require that the process is locked when it
is called.
- Change sysctl_out_proc() to require that the process is locked when it
  is called and to drop the lock before it returns.  If this proves too
  complex we can change sysctl_out_proc() to simply acquire the lock at
  the very end and have the calling code drop the lock right after it
  returns.
- Lock the process we are going to export before the p_cansee() in the
  loop in sysctl_kern_proc() and hold the lock until we call
  sysctl_out_proc().
- Don't call p_cansee() on the process about to be exported twice in
  the aforementioned loop.
2002-04-09 20:10:46 +00:00
Alfred Perlstein
e9b192b758 Protect proc struct (p_args and p_comm) when doing procfs IO that pulls
data from it.

Submitted by: Jonathan Mini <mini@haikugeek.com>
2002-03-29 19:12:40 +00:00
Jeff Roberson
851031501a Remove references to vm_zone.h and switch over to the new uma API. 2002-03-20 10:35:22 +00:00
Julian Elischer
bc9f367b48 remove "discards qualifier" erro by not potentially writing to
a const *.
2002-02-26 23:38:34 +00:00
Seigo Tanimura
f591779bb5 Lock struct pgrp, session and sigio.
New locks are:

- pgrpsess_lock which locks the whole pgrps and sessions,
- pg_mtx which protects the pgrp members, and
- s_mtx which protects the session members.

Please refer to sys/proc.h for the coverage of these locks.

Changes on the pgrp/session interface:

- pgfind() needs the pgrpsess_lock held.

- The caller of enterpgrp() is responsible to allocate a new pgrp and
  session.

- Call enterthispgrp() in order to enter an existing pgrp.

- pgsignal() requires a pgrp lock held.

Reviewed by:	jhb, alfred
Tested on:	cvsup.jp.FreeBSD.org
		(which is a quad-CPU machine running -current)
2002-02-23 11:12:57 +00:00
Dag-Erling Smørgrav
157b65ae7f Pull in more stuff from procfs now that it's been pseudofsized. 2001-12-09 00:38:59 +00:00
Robert Watson
011376308f o Introduce pr_mtx into struct prison, providing protection for the
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
2001-12-03 16:12:27 +00:00
Matthew Dillon
59ea846905 promote tv_sec in printf to make it type agnostic 2001-10-29 02:17:41 +00:00
Poul-Henning Kamp
71ab1fa5df Reporting device drivers by traversing cdevsw[] is at best a hack
which may or may not return something which is partially right.

Disable the "devices" file until we find out what this is needed for,
and what exactly those apps need.

This will allow cdevsw to become static again.

Approved by:	DES
2001-10-26 15:30:44 +00:00
Dag-Erling Smørgrav
7936569b00 Add proc/mtab which simulates a Linux system's /etc/mtab. 2001-10-21 15:56:46 +00:00
Dag-Erling Smørgrav
a55f7148f1 #if 0 out some code that depends on other uncommitted patches. 2001-10-19 01:52:13 +00:00
Dag-Erling Smørgrav
1c0bfd6e3a Adapt to pseudofs changes (dynamic initialization, not static).
Use the new linux_ifname() function from the linuxulator rather than roll
our own interface name translation.
2001-10-19 01:45:03 +00:00
Dag-Erling Smørgrav
e4fea9d1dd Catch up with the visibility callback stuff, and give up trying to keep the
file definitions on single lines.
2001-10-01 04:31:05 +00:00
Dag-Erling Smørgrav
a73a153aff Specify readability and / or writeability for all nodes that need it. 2001-09-30 19:42:41 +00:00
Dag-Erling Smørgrav
2bb3ce0c47 Adapt to pseudofs version 2. Sorry about the breakage - I had this ready
to commit along with the pseudofs patches, but just plain forgot.
2001-09-29 22:07:13 +00:00
Dag-Erling Smørgrav
689364858e Clean up my source tree to avoid getting hit too badly by the next KSE or
whatever mega-commit.  No real functional changes, just some experiments /
work in progress.
2001-09-25 13:24:24 +00:00
Julian Elischer
b40ce4165d KSE Milestone 2
Note ALL MODULES MUST BE RECOMPILED
make the kernel aware that there are smaller units of scheduling than the
process. (but only allow one thread per process at this time).
This is functionally equivalent to teh previousl -current except
that there is a thread associated with each process.

Sorry john! (your next MFC will be a doosie!)

Reviewed by: peter@freebsd.org, dillon@freebsd.org

X-MFC after:    ha ha ha ha
2001-09-12 08:38:13 +00:00
Robert Watson
a0f75161f9 o Replace calls to p_can(..., P_CAN_xxx) with calls to p_canxxx().
The p_can(...) construct was a premature (and, it turns out,
  awkward) abstraction.  The individual calls to p_canxxx() better
  reflect differences between the inter-process authorization checks,
  such as differing checks based on the type of signal.  This has
  a side effect of improving code readability.
o Replace direct credential authorization checks in ktrace() with
  invocation of p_candebug(), while maintaining the special case
  check of KTR_ROOT.  This allows ktrace() to "play more nicely"
  with new mandatory access control schemes, as well as making its
  authorization checks consistent with other "debugging class"
  checks.
o Eliminate "privused" construct for p_can*() calls which allowed the
  caller to determine if privilege was required for successful
  evaluation of the access control check.  This primitive is currently
  unused, and as such, serves only to complicate the API.

Approved by:	({procfs,linprocfs} changes) des
Obtained from:	TrustedBSD Project
2001-07-05 17:10:46 +00:00
Dag-Erling Smørgrav
336d3d2ab3 Say one thing, do the other... nextpid -> lastpid 2001-06-11 23:00:35 +00:00
Dag-Erling Smørgrav
4c17857638 Implement proc/cpuinfo for the Alpha (thanks to gallatin).
Implement proc/pid/cmdline.
2001-06-11 21:55:40 +00:00
Dag-Erling Smørgrav
da6d379c40 Minor whitespace changes. 2001-06-11 00:17:59 +00:00
Dag-Erling Smørgrav
320414ec14 These aren't needed any more. 2001-06-10 23:24:14 +00:00
Dag-Erling Smørgrav
f08adc10fa New pseudofs-based linprocfs (repo-copied from linprocfs_misc.c). 2001-06-10 23:23:59 +00:00
Robert Watson
b1fc0ec1a7 o Merge contents of struct pcred into struct ucred. Specifically, add the
real uid, saved uid, real gid, and saved gid to ucred, as well as the
  pcred->pc_uidinfo, which was associated with the real uid, only rename
  it to cr_ruidinfo so as not to conflict with cr_uidinfo, which
  corresponds to the effective uid.
o Remove p_cred from struct proc; add p_ucred to struct proc, replacing
  original macro that pointed.
  p->p_ucred to p->p_cred->pc_ucred.
o Universally update code so that it makes use of ucred instead of pcred,
  p->p_ucred instead of p->p_pcred, cr_ruidinfo instead of p_uidinfo,
  cr_{r,sv}{u,g}id instead of p_*, etc.
o Remove pcred0 and its initialization from init_main.c; initialize
  cr_ruidinfo there.
o Restruction many credential modification chunks to always crdup while
  we figure out locking and optimizations; generally speaking, this
  means moving to a structure like this:
        newcred = crdup(oldcred);
        ...
        p->p_ucred = newcred;
        crfree(oldcred);
  It's not race-free, but better than nothing.  There are also races
  in sys_process.c, all inter-process authorization, fork, exec, and
  exit.
o Remove sigio->sio_ruid since sigio->sio_ucred now contains the ruid;
  remove comments indicating that the old arrangement was a problem.
o Restructure exec1() a little to use newcred/oldcred arrangement, and
  use improved uid management primitives.
o Clean up exit1() so as to do less work in credential cleanup due to
  pcred removal.
o Clean up fork1() so as to do less work in credential cleanup and
  allocation.
o Clean up ktrcanset() to take into account changes, and move to using
  suser_xxx() instead of performing a direct uid==0 comparision.
o Improve commenting in various kern_prot.c credential modification
  calls to better document current behavior.  In a couple of places,
  current behavior is a little questionable and we need to check
  POSIX.1 to make sure it's "right".  More commenting work still
  remains to be done.
o Update credential management calls, such as crfree(), to take into
  account new ruidinfo reference.
o Modify or add the following uid and gid helper routines:
      change_euid()
      change_egid()
      change_ruid()
      change_rgid()
      change_svuid()
      change_svgid()
  In each case, the call now acts on a credential not a process, and as
  such no longer requires more complicated process locking/etc.  They
  now assume the caller will do any necessary allocation of an
  exclusive credential reference.  Each is commented to document its
  reference requirements.
o CANSIGIO() is simplified to require only credentials, not processes
  and pcreds.
o Remove lots of (p_pcred==NULL) checks.
o Add an XXX to authorization code in nfs_lock.c, since it's
  questionable, and needs to be considered carefully.
o Simplify posix4 authorization code to require only credentials, not
  processes and pcreds.  Note that this authorization, as well as
  CANSIGIO(), needs to be updated to use the p_cansignal() and
  p_cansched() centralized authorization routines, as they currently
  do not take into account some desirable restrictions that are handled
  by the centralized routines, as well as being inconsistent with other
  similar authorization instances.
o Update libkvm to take these changes into account.

Obtained from:	TrustedBSD Project
Reviewed by:	green, bde, jhb, freebsd-arch, freebsd-audit
2001-05-25 16:59:11 +00:00
Jonathan Lemon
d9b610a0db Add new 'loadavg' entry, fix overflow with meminfo.
PR: 27253, 27350
Submitted by: Jim Pirzyk
2001-05-19 05:54:26 +00:00
Alfred Perlstein
2395531439 Introduce a global lock for the vm subsystem (vm_mtx).
vm_mtx does not recurse and is required for most low level
vm operations.

faults can not be taken without holding Giant.

Memory subsystems can now call the base page allocators safely.

Almost all atomic ops were removed as they are covered under the
vm mutex.

Alpha and ia64 now need to catch up to i386's trap handlers.

FFS and NFS have been tested, other filesystems will need minor
changes (grabbing the vm lock when twiddling page properties).

Reviewed (partially) by: jake, jhb
2001-05-19 01:28:09 +00:00
Dag-Erling Smørgrav
ee72cb740e Avoid overflow when converting ticks to jiffies.
PR:		27215
Submitted by:	Jim Pirzyk <Jim.Pirzyk@disney.com>
2001-05-09 11:41:54 +00:00
Jonathan Lemon
5b3721af37 Fix the problem of some directory entries going missing when
read by the linux version of 'ls'.

Spotted by: rwatson
2001-05-04 05:19:22 +00:00
Mark Murray
fb919e4d5a Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
other "system" header files.

Also help the deprecation of lockmgr.h by making it a sub-include of
sys/lock.h and removing sys/lockmgr.h form kernel .c files.

Sort sys/*.h includes where possible in affected files.

OK'ed by:	bde (with reservations)
2001-05-01 08:13:21 +00:00
Poul-Henning Kamp
b7ebffbc08 Add a vop_stdbmap(), and make it part of the default vop vector.
Make 7 filesystems which don't really know about VOP_BMAP rely
on the default vector, rather than more or less complete local
vop_nopbmap() implementations.
2001-04-29 11:48:41 +00:00
John Baldwin
33a9ed9d0e Change the pfind() and zpfind() functions to lock the process that they
find before releasing the allproc lock and returning.

Reviewed by:	-smp, dfr, jake
2001-04-24 00:51:53 +00:00
John Baldwin
bc4ffcc97f Add missing includes of <sys/sx.h>
Reported by:	peter
2001-03-28 15:04:22 +00:00
John Baldwin
1005a129e5 Convert the allproc and proctree locks from lockmgr locks to sx locks. 2001-03-28 11:52:56 +00:00
Jonathan Lemon
b47ed6cbf6 Eliminate global node types and instead use an operations vector for
each node in order to make it easier to add new entries.

Rewrite the internal directory structure so that it is possible to
have independent subdirectories.  Utilize this to add /proc/net/dev.

Reviewed by:  DES
2001-03-12 03:16:56 +00:00
John Baldwin
19eb87d22a Grab the process lock while calling psignal and before calling psignal. 2001-03-07 03:37:06 +00:00
John Baldwin
f553c1794d Just hold the proc lock while getting the parent's PID rather than a
proctree lock.
2001-03-07 03:21:26 +00:00
Adrian Chadd
f3a90da995 Reviewed by: jlemon
An initial tidyup of the mount() syscall and VFS mount code.

This code replaces the earlier work done by jlemon in an attempt to
make linux_mount() work.

* the guts of the mount work has been moved into vfs_mount().

* move `type', `path' and `flags' from being userland variables into being
  kernel variables in vfs_mount(). `data' remains a pointer into
  userspace.

* Attempt to verify the `type' and `path' strings passed to vfs_mount()
  aren't too long.

* rework mount() and linux_mount() to take the userland parameters
  (besides data, as mentioned) and pass kernel variables to vfs_mount().
  (linux_mount() already did this, I've just tidied it up a little more.)

* remove the copyin*() stuff for `path'. `data' still requires copyin*()
  since its a pointer into userland.

* set `mount->mnt_statf_mntonname' in vfs_mount() rather than in each
  filesystem.  This variable is generally initialised with `path', and
  each filesystem can override it if they want to.

* NOTE: f_mntonname is intiailised with "/" in the case of a root mount.
2001-03-01 21:00:17 +00:00
Robert Watson
91421ba234 o Move per-process jail pointer (p->pr_prison) to inside of the subject
credential structure, ucred (cr->cr_prison).
o Allow jail inheritence to be a function of credential inheritence.
o Abstract prison structure reference counting behind pr_hold() and
  pr_free(), invoked by the similarly named credential reference
  management functions, removing this code from per-ABI fork/exit code.
o Modify various jail() functions to use struct ucred arguments instead
  of struct proc arguments.
o Introduce jailed() function to determine if a credential is jailed,
  rather than directly checking pointers all over the place.
o Convert PRISON_CHECK() macro to prison_check() function.
o Move jail() function prototypes to jail.h.
o Emulate the P_JAILED flag in fill_kinfo_proc() and no longer set the
  flag in the process flags field itself.
o Eliminate that "const" qualifier from suser/p_can/etc to reflect
  mutex use.

Notes:

o Some further cleanup of the linux/jail code is still required.
o It's now possible to consider resolving some of the process vs
  credential based permission checking confusion in the socket code.
o Mutex protection of struct prison is still not present, and is
  required to protect the reference count plus some fields in the
  structure.

Reviewed by:	freebsd-arch
Obtained from:	TrustedBSD Project
2001-02-21 06:39:57 +00:00
Bosko Milekic
9ed346bab0 Change and clean the mutex lock interface.
mtx_enter(lock, type) becomes:

mtx_lock(lock) for sleep locks (MTX_DEF-initialized locks)
mtx_lock_spin(lock) for spin locks (MTX_SPIN-initialized)

similarily, for releasing a lock, we now have:

mtx_unlock(lock) for MTX_DEF and mtx_unlock_spin(lock) for MTX_SPIN.
We change the caller interface for the two different types of locks
because the semantics are entirely different for each case, and this
makes it explicitly clear and, at the same time, it rids us of the
extra `type' argument.

The enter->lock and exit->unlock change has been made with the idea
that we're "locking data" and not "entering locked code" in mind.

Further, remove all additional "flags" previously passed to the
lock acquire/release routines with the exception of two:

MTX_QUIET and MTX_NOSWITCH

The functionality of these flags is preserved and they can be passed
to the lock/unlock routines by calling the corresponding wrappers:

mtx_{lock, unlock}_flags(lock, flag(s)) and
mtx_{lock, unlock}_spin_flags(lock, flag(s)) for MTX_DEF and MTX_SPIN
locks, respectively.

Re-inline some lock acq/rel code; in the sleep lock case, we only
inline the _obtain_lock()s in order to ensure that the inlined code
fits into a cache line. In the spin lock case, we inline recursion and
actually only perform a function call if we need to spin. This change
has been made with the idea that we generally tend to avoid spin locks
and that also the spin locks that we do have and are heavily used
(i.e. sched_lock) do recurse, and therefore in an effort to reduce
function call overhead for some architectures (such as alpha), we
inline recursion for this case.

Create a new malloc type for the witness code and retire from using
the M_DEV type. The new type is called M_WITNESS and is only declared
if WITNESS is enabled.

Begin cleaning up some machdep/mutex.h code - specifically updated the
"optimized" inlined code in alpha/mutex.h and wrote MTX_LOCK_SPIN
and MTX_UNLOCK_SPIN asm macros for the i386/mutex.h as we presently
need those.

Finally, caught up to the interface changes in all sys code.

Contributors: jake, jhb, jasone (in no particular order)
2001-02-09 06:11:45 +00:00
John Baldwin
ec447af191 - Proc locking.
- Use queue macros.
- Use NULL instead of 0 for pointers.

Reviewed by:	des
2001-01-23 22:13:07 +00:00
Jake Burkholder
549f00c753 Protect proc.p_pptr with the proctree lock. 2001-01-10 15:41:26 +00:00
Dag-Erling Smørgrav
6e66bfacfa Use kinfo_proc instead of eproc (which Kirk deep-sixed earlier this week)
Generate a version string that looks just like a real Linux one - almost :)

Use sbufs everywhere instead of sprintf(). Note that this is still imperfect,
as the code does not check whether the sbuf overflowed - but it'll still
work better than before, since if the sbuf overflows, the code now simply
copies out 0 bytes instead of causing a trap (or worse, corrupting kernel
structures)
2000-12-13 20:22:24 +00:00
Dag-Erling Smørgrav
315ab977dc Add dependency on linux, which is needed for proc/version. 2000-12-13 20:19:06 +00:00
Jake Burkholder
1756a185cf Lock the allproc list.
Approved by:	DES
2000-12-13 09:05:45 +00:00
Dag-Erling Smørgrav
96e37d17e6 Point #includes at compat/linprocfs instead of i386/linux/linprocfs. 2000-12-12 22:06:05 +00:00
Dag-Erling Smørgrav
b51a26edb2 Add proc/<pid>/cmdline. 2000-12-09 16:20:48 +00:00
Dag-Erling Smørgrav
8b5a844af9 Add a dependency on procfs. 2000-12-09 16:20:35 +00:00
Dag-Erling Smørgrav
f786d43aac A bunch of fixes that have been rotting in my tree for a month or two
waiting for procfs to get fixed:

  - Use fill_eproc() to obtain correct VM stats. Attempt to compute VmLib.

  - Fill some more fields in proc/<pid>/stat, and add four (unimplemented)
    fields after studying a recent Linux kernel.

  - Compute CPU frequency only once instead of twice.

  - Fix some comments that were OBE.

  - Fix indentation except where it makes the code less readable.
2000-12-09 13:25:54 +00:00
John Baldwin
0de7d1da20 Protect access to p_stat with sched_lock. 2000-12-01 06:34:19 +00:00
Dag-Erling Smørgrav
fbbd9aebdd Add bogomips to cpuinfo (set it equal to the CPU frequency, which is bogus
but not more so than Linux' definition).
This should get the IBM JDK 1.3 working again.

Prompted by:	sobomax
2000-11-27 11:10:03 +00:00
Dag-Erling Smørgrav
fd9f324055 Check that p->p_pptr is not NULL - kernel processes have no parents! 2000-11-06 03:23:56 +00:00
Dag-Erling Smørgrav
f8c05e5019 Bring cpuinfo closer to what it looks like in Linux 2.2.
Submitted by:	R Bradford Jones <brad@kazrak.com>
2000-10-25 22:38:23 +00:00
Dag-Erling Smørgrav
886a6f6fca Add /proc/<pid>/status and /proc/<pid>/stat (the latter being mostly
zeroes for the time being).

Prompted by:	Nathan Boeger <nathan@khmere.com>
2000-10-25 22:12:59 +00:00
Dag-Erling Smørgrav
e57416dc56 Mark directories as directories, not as regular files. 2000-10-10 12:32:44 +00:00
Dag-Erling Smørgrav
cd595ef506 Fix cut'n'paste bogon.
Submitted by:	Jim Pirzyk <Jim.Pirzyk@disney.com>
2000-09-18 17:46:01 +00:00
Dag-Erling Smørgrav
fecfecfbd0 Remove unused variables. 2000-09-09 14:35:35 +00:00
Dag-Erling Smørgrav
ddc0b9925d Add stat, uptime and version.
Note that version currently returns the first line of the version string
from vers.c, which is not quite what a Linux system would return.
2000-09-09 11:44:58 +00:00
Dag-Erling Smørgrav
81dc16f619 Pierre Beyssac originally derived linprocfs from procfs, and I've made (and
will keep making) significant modifications, so I'm adding both our copyrights
to the top of these files.
2000-09-07 16:44:26 +00:00
Dag-Erling Smørgrav
9acf7ab9bc Remove obsolete comment (see rev 1.84 of procfs_vnops.c) 2000-09-04 18:19:04 +00:00
Robert Watson
c0ea0959b8 o Synchronize linprocfs authorization with procfs authorization improvements
(better hiding of hidden processes, more access checks, use vaccess(), et
  al)

Approved by:	des
Obtained from:	TrustedBSD Project
2000-09-01 18:40:52 +00:00
Robert Watson
9cd5f4c13b o Update linprocfs to include similar changes as those in procfs, fixing
the build (oops!): replace calls to p_trespass() and PRISON_CHECK()
  with p_can(..., {P_CAN_SEE, P_CAN_DEBUG}, NULL)
o Remove volatile usage from procfs_readdir() to remove warnings
o Apply bp's CREATE fix to linprocfs, causing EROFS to be returned on
  CREATE calls to procfs_lookup()
o Some further synchronization still needs to occur: only existing
  access checks were replaced, to fix the build--the new ones were not
  added.  I'll do this later today, this is a "fix the build quickly"
  commit.  This means that, in the interim, some information leakage
  can still occur via linprocfs when using jail or kern.ps_showallprocs

Submitted by:	knu
Approved by:	des
Obtained from:	TrustedBSD Project
2000-08-30 13:23:19 +00:00
Bruce Evans
c6e4d7c5ba Fixed null pointer panic for accessing "meminfo" when there is no swap. 2000-08-12 21:08:42 +00:00
Dag-Erling Smørgrav
ce4e34c875 Make exe a symlink. 2000-05-24 07:37:02 +00:00
Mike Smith
ce0cdebef3 Fix include paths so that this builds correctly.
Submitted by:	Mike Pritchard <mpp@mppsystems.com>
2000-04-21 05:54:11 +00:00
Mike Smith
06ab4b95d8 Move the linprocfs bits under the rest of the i386 linux compatibility
code.
2000-04-20 03:54:27 +00:00