Commit Graph

52 Commits

Author SHA1 Message Date
Eitan Adler
e07db02261 [procfs] Split procfs_attr into multiple functions
Reviewed by:	des, kib
Discussed with:	mmacy
Differential Revision:	https://reviews.freebsd.org/D15150
2018-04-24 14:49:09 +00:00
Pedro F. Giffuni
51369649b0 sys: further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.
2017-11-20 19:43:44 +00:00
Eric Badger
99b14d9f1b remove procfs ctl interface
This interface has no in-tree consumers and has been more or less
non-functional for several releases.

Remove manpage note that the procfs special file 'mem' is grouped to
kmem. This hasn't been true since r81107.

Remove procfs' README file. It is an out of date duplication of the manpage
(quoth the README: "since the bsd kernel is single-processor...").

Reviewed by:	vangyzen, bcr (manpage)
Approved by:	des (procfs maintainer), vangyzen (mentor)
Differential Revision:	https://reviews.freebsd.org/D9802
2017-03-05 03:05:24 +00:00
Warner Losh
fbbd9655e5 Renumber copyright clause 4
Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by:	Jan Schaumann <jschauma@stevens.edu>
Pull Request:	https://github.com/freebsd/freebsd/pull/96
2017-02-28 23:42:47 +00:00
Konstantin Belousov
17dfbc1c43 Add per-process osrel node to the procfs, to allow read and set p_osrel
value for the process.

Approved by:	des (procfs maintainer)
MFC after:	3 weeks
2009-09-23 12:08:08 +00:00
Warner Losh
d167cf6f3a /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 18:10:42 +00:00
Warner Losh
f36cfd49ad Remove advertising clause from University of California Regent's
license, per letter dated July 22, 1999 and email from Peter Wemm,
Alan Cox and Robert Watson.

Approved by: core, peter, alc, rwatson
2004-04-07 20:46:16 +00:00
Robert Watson
763bbd2f4f Slightly change the semantics of vnode labels for MAC: rather than
"refreshing" the label on the vnode before use, just get the label
right from inception.  For single-label file systems, set the label
in the generic VFS getnewvnode() code; for multi-label file systems,
leave the labeling up to the file system.  With UFS1/2, this means
reading the extended attribute during vfs_vget() as the inode is
pulled off disk, rather than hitting the extended attributes
frequently during operations later, improving performance.  This
also corrects sematics for shared vnode locks, which were not
previously present in the system.  This chances the cache
coherrency properties WRT out-of-band access to label data, but in
an acceptable form.  With UFS1, there is a small race condition
during automatic extended attribute start -- this is not present
with UFS2, and occurs because EAs aren't available at vnode
inception.  We'll introduce a work around for this shortly.

Approved by:	re
Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, Network Associates Laboratories
2002-10-26 14:38:24 +00:00
Robert Watson
c1ff2d9baf Introduce support for Mandatory Access Control and extensible
kernel access control.

Modify procfs so that (when mounted multilabel) it exports process MAC
labels as the vnode labels of procfs vnodes associated with processes.

Approved by:	des
Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, NAI Labs
2002-08-01 02:03:21 +00:00
Robert Watson
d51ed1a04a Spelling fix for comment. 2002-04-20 01:14:25 +00:00
Dag-Erling Smørgrav
40e7a740c9 Remove an obsolete prototype for procfs_kmemaccess().
Submitted by:	rwatson
2001-12-11 19:07:10 +00:00
Dag-Erling Smørgrav
4aac2aa96c Fix a KSEfication brain-o in procfs_doprocfile(): return the path of the target process,
not the calling process.  While we're here, also unstaticize procfs_doprocfile() and
procfs_docurproc() so linprocfs can call them directly instead of duplicating them.

Submitted by:	Dominic Mitchell <dom@semantico.com>
2001-12-08 22:34:14 +00:00
Dag-Erling Smørgrav
3a669c52a8 Pseudofsize procfs(5). 2001-12-04 01:35:06 +00:00
Dag-Erling Smørgrav
3da3249106 Dissociate ptrace from procfs.
Until now, the ptrace syscall was implemented as a wrapper that called
various functions in procfs depending on which ptrace operation was
requested.  Most of these functions were themselves wrappers around
procfs_{read,write}_{,db,fp}regs(), with only some extra error checks,
which weren't necessary in the ptrace case anyway.

This commit moves procfs_rwmem() from procfs_mem.c into sys_process.c
(renaming it to proc_rwmem() in the process), and implements ptrace()
directly in terms of procfs_{read,write}_{,db,fp}regs() instead of
having it fake up a struct uio and then call procfs_do{,db,fp}regs().

It also moves the prototypes for procfs_{read,write}_{,db,fp}regs()
and proc_rwmem() from proc.h to ptrace.h, and marks all procfs files
except procfs_machdep.c as "optional procfs" instead of "standard".
2001-10-07 20:08:42 +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
7d69e57088 Remove dangling prototype for the now defunct procfs_kmemaccess()
call.

Obtained from:	TrustedBSD Project
2001-08-03 17:51:05 +00:00
Robert Watson
f2e6be5865 Prior to support for almost all ps activity via sysctl, ps used procfs,
and so special-casing was introduced to provide extra procfs privilege
to the kmem group.  With the advent of non-setgid kmem ps, this code
is no longer required, and in fact, can is potentially harmful as it
allocates privilege to a gid that is increasingly less meaningful.
Knowledge of specific gid's in kernel is also generally bad precedent,
as the kernel security policy doesn't distinguish gid's specifically,
only uid 0.

This commit removes reference to kmem in procfs, both in terms of
access control decisions, and the applying of gid kmem to the
/proc/*/mem file, simplifying the associated code considerably.
Processes are still permitted to access the mem file based on
the debugging policy, so ps -e still works fine for normal
processes and use.

Reviewed by:	tmm
Obtained from:	TrustedBSD Project
2001-08-03 17:13:23 +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
Brian Feldman
b7db19017b Move procfs_fullpath() to vfs_cache.c, with a rename to textvp_fullpath().
There's no excuse to have code in synthetic filestores that allows direct
references to the textvp anymore.

Feature requested by:	msmith
Feature agreed to by:	warner
Move requested by:	phk
Move agreed to by:	bde
2000-04-26 11:57:45 +00:00
Brian Feldman
081d7b00c7 Welcome back our old friend from procfs, "file"! 2000-04-22 03:44:41 +00:00
Peter Wemm
c447342094 Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL"
is an application space macro and the applications are supposed to be free
to use it as they please (but cannot).  This is consistant with the other
BSD's who made this change quite some time ago.  More commits to come.
1999-12-29 05:07:58 +00:00
Poul-Henning Kamp
a9e0361b4a Introduce the new function
p_trespass(struct proc *p1, struct proc *p2)
which returns zero or an errno depending on the legality of p1 trespassing
on p2.

Replace kern_sig.c:CANSIGNAL() with call to p_trespass() and one
extra signal related check.

Replace procfs.h:CHECKIO() macros with calls to p_trespass().

Only show command lines to process which can trespass on the target
process.
1999-11-21 19:03:20 +00:00
Poul-Henning Kamp
da654d9070 s/p_cred->pc_ucred/p_ucred/g 1999-11-21 12:38:21 +00:00
Sean Eric Fagan
13baacebcb A process should be able to examine itself. 1999-11-20 18:22:14 +00:00
Peter Wemm
c3aac50f28 $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
Jonathan Lemon
ab001a72be Implement support for hardware debug registers on the i386.
Submitted by:	Brian Dean <brdean@unx.sas.com>
1999-07-09 04:16:00 +00:00
Poul-Henning Kamp
7a7404d275 Eliminate the bogus procfs private almost struct dirent structure.
Spotted by: Lars Hamren
Reviewed by: bde
1999-06-13 20:53:16 +00:00
Poul-Henning Kamp
8902608d57 Add even more () to CHECKIO which by now feels positively LISPish.
Submitted by:	bde
Reviewed by:	phk
1999-05-04 08:00:10 +00:00
Poul-Henning Kamp
d37ed5a03a Add a new "file" to procfs: "rlimit" which shows the resource limits for
the process.

PR:		11342
Submitted by:	Adrian Chadd adrian@freebsd.org
Reviewed by:	phk
1999-04-30 13:04:21 +00:00
Poul-Henning Kamp
75c1354190 This Implements the mumbled about "Jail" feature.
This is a seriously beefed up chroot kind of thing.  The process
is jailed along the same lines as a chroot does it, but with
additional tough restrictions imposed on what the superuser can do.

For all I know, it is safe to hand over the root bit inside a
prison to the customer living in that prison, this is what
it was developed for in fact:  "real virtual servers".

Each prison has an ip number associated with it, which all IP
communications will be coerced to use and each prison has its own
hostname.

Needless to say, you need more RAM this way, but the advantage is
that each customer can run their own particular version of apache
and not stomp on the toes of their neighbors.

It generally does what one would expect, but setting up a jail
still takes a little knowledge.

A few notes:

   I have no scripts for setting up a jail, don't ask me for them.

   The IP number should be an alias on one of the interfaces.

   mount a /proc in each jail, it will make ps more useable.

   /proc/<pid>/status tells the hostname of the prison for
   jailed processes.

   Quotas are only sensible if you have a mountpoint per prison.

   There are no privisions for stopping resource-hogging.

   Some "#ifdef INET" and similar may be missing (send patches!)

If somebody wants to take it from here and develop it into
more of a "virtual machine" they should be most welcome!

Tools, comments, patches & documentation most welcome.

Have fun...

Sponsored by:   http://www.rndassociates.com/
Run for almost a year by:       http://www.servetheweb.com/
1999-04-28 11:38:52 +00:00
Poul-Henning Kamp
f711d546d2 Suser() simplification:
1:
  s/suser/suser_xxx/

2:
  Add new function: suser(struct proc *), prototyped in <sys/proc.h>.

3:
  s/suser_xxx(\([a-zA-Z0-9_]*\)->p_ucred, \&\1->p_acflag)/suser(\1)/

The remaining suser_xxx() calls will be scrutinized and dealt with
later.

There may be some unneeded #include <sys/cred.h>, but they are left
as an exercise for Bruce.

More changes to the suser() API will come along with the "jail" code.
1999-04-27 11:18:52 +00:00
Peter Wemm
75ba77578f A partial implementation of the procfs cmdline pseudo-file. This
is enough to satisfy things like StarOffice.  This is a hack, but doing
it properly would be a LOT of work, and would require extensive grovelling
around in the user address space to find the argv[].

Obtained from: Mostly from Andrzej Bialecki <abial@nask.pl>.
1999-01-05 03:53:06 +00:00
Bruce Evans
96eb19e1a3 Quick fix for type mismatches which were fatal if longs aren't 32
bits.  We used a private, wrong, version of `struct dirent' to help
break getdirentries(), and we use a silly check that the size of this
struct is a power of 2 to help break mount() if getdirentries() would
not work.  This fix just changes the struct to match `struct dirent'
(except for the name length).
1998-07-07 04:08:44 +00:00
Tor Egge
afc6ea238f Disallow reading the current kernel stack. Only the user structure and
the current registers should be accessible.
Reviewed by:	David Greenman <dg@root.com>
1998-05-19 00:00:14 +00:00
Bruce Evans
a954e88d0b Fixed a missing/misplaced/misstyled prototype. 1997-12-30 08:46:44 +00:00
Bruce Evans
bea0f0be7b Some staticized variables were still declared to be extern. 1997-09-07 05:27:26 +00:00
Sean Eric Fagan
49356a1f4a Fix procfs security hole -- check permissions on meaningful I/Os (namely,
reading/writing of mem and regs).  Also have to check for the requesting
process being group KMEM -- this is a bit of a hack, but ps et al need it.

Reviewed by:	davidg
1997-08-12 04:34:30 +00:00
Peter Wemm
6875d25465 Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not
ready for it yet.
1997-02-22 09:48:43 +00:00
John Dyson
996c772f58 This is the kernel Lite/2 commit. There are some requisite userland
changes, so don't expect to be able to run the kernel as-is (very well)
without the appropriate Lite/2 userland changes.

The system boots and can mount UFS filesystems.

Untested: ext2fs, msdosfs, NFS
Known problems: Incorrect Berkeley ID strings in some files.
		Mount_std mounts will not work until the getfsent
		library routine is changed.

Reviewed by:	various people
Submitted by:	Jeffery Hsu <hsu@freebsd.org>
1997-02-10 02:22:35 +00:00
Jordan K. Hubbard
1130b656e5 Make the long-awaited change from $Id$ to $FreeBSD$
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore.  This update would have been
insane otherwise.
1997-01-14 07:20:47 +00:00
John Dyson
688bbd5b76 Implement locking for pfs nodes, when at the leaf. Concurrent access
to information from a single process causes hangs.  Specifically, this
fixes problems (hangs) with concurrent ps commands, when the system is under
heavy memory load.
Reviewed by:	davidg
1996-07-02 13:38:10 +00:00
John Dyson
6ead3edd9c Clean-up the new VM map procfs code, and also add support for executable
format file "etype".  It contains a description of the binary type for
a process.
1996-06-18 05:16:00 +00:00
John Dyson
9353aadd89 Add a feature to procfs to allow display of the process address map
with multiple entries as follows:

	start address, end address, resident pages in range, private pages
		in range, RW/RO, COW or not, (vnode/device/swap/default).
1996-06-17 22:43:36 +00:00
Peter Wemm
0cc7521383 Major fixes for procfs..
Implement a "variable" directory structure. Files that do not make
sense for the given process do not "appear" and cannot be opened.
For example, "system" processes do not have "file", "regs" or "fpregs",
because they do not have a user area.

"attempt" to fill in the user area of a given process when it is being
accessed via /proc/pid/mem (the user struct is just after
VM_MAXUSER_ADDRESS in the process address space.)

Dont do IO to the U area while it's swapped, hold it in place if possible.

Lock off access to the "ctl" file if it's done a setuid like the other
pseudo-files in there.
1996-01-24 18:41:41 +00:00
Bruce Evans
fcf985ad5d Moved declarations for static functions to the correct place (not in a
header).

Removed stupid comments.
1995-11-16 11:39:11 +00:00
Bruce Evans
f57e65478d Introduced a type `vop_t' for vnode operation functions and used
it 1138 times (:-() in casts and a few more times in declarations.
This change is null for the i386.

The type has to be `typedef int vop_t(void *)' and not `typedef
int vop_t()' because `gcc -Wstrict-prototypes' warns about the
latter.  Since vnode op functions are called with args of different
(struct pointer) types, neither of these function types is any use
for type checking of the arg, so it would be preferable not to use
the complete function type, especially since using the complete
type requires adding 1138 casts to avoid compiler warnings and
another 40+ casts to reverse the function pointer conversions before
calling the functions.
1995-11-09 08:17:23 +00:00
Poul-Henning Kamp
159a024357 Make a lot of private stuff static.
Should anybody out there wonder about this vendetta against global
variables, it is basically to make it more visible what our interfaces
in the kernel really are.
I'm almost convinced we should have a
	#define PUBLIC /* public interface */
and use it in the #includes...
1995-11-07 13:39:31 +00:00
David Greenman
243e5a88d5 Fixed panic that resulted from mmaping files in kernfs and procfs. A
regular user could panic the machine with a simple "tail /proc/curproc/mem"
command. The problem was twofold: both kernfs and procfs didn't fill in
the mnt_stat statfs struct (which would later lead to an integer divide
fault in the vnode pager), and kernfs bogusly paniced if a bmap was
attempted.

Reviewed by:	John Dyson
1995-05-25 01:35:24 +00:00
David Greenman
f62e09f22e Made /proc/n/mem file group kmem and group readable. Needed to fix ps so
that it doesn't need to be setuid root.
1995-04-15 02:30:17 +00:00
Bruce Evans
b5e8ce9f12 Add and move declarations to fix all of the warnings from `gcc -Wimplicit'
(except in netccitt, netiso and netns) and most of the warnings from
`gcc -Wnested-externs'.  Fix all the bugs found.  There were no serious
ones.
1995-03-16 18:17:34 +00:00