Commit Graph

42 Commits

Author SHA1 Message Date
Dmitry Chagin
a93e83c8d7 In preparation for switching linuxulator to the use the native 1:1
threads split sys_sched_getparam(), sys_sched_setparam(),
sys_sched_getscheduler(), sys_sched_setscheduler() to their kern_*
counterparts and add targettd parameter to allow specify the target
thread directly by callee.

Differential Revision:	https://reviews.freebsd.org/D1034
Reviewed by:	trasz
2015-05-24 14:44:06 +00:00
Dmitry Chagin
1aa90eca33 In preparation for switching linuxulator to the use the native 1:1
threads refactor kern_sched_rr_get_interval() and sys_sched_rr_get_interval().
Add a kern_sched_rr_get_interval() counterpart which takes a targettd
parameter to allow specify target thread directly by callee (new Linuxulator).

Linuxulator temporarily uses first thread in proc.

Move linux_sched_rr_get_interval() to the MI part.

Differential Revision:	https://reviews.freebsd.org/D1032
Reviewed by:	trasz
2015-05-24 14:39:26 +00:00
Kip Macy
8451d0dd78 In order to maximize the re-usability of kernel code in user space this
patch modifies makesyscalls.sh to prefix all of the non-compatibility
calls (e.g. not linux_, freebsd32_) with sys_ and updates the kernel
entry points and all places in the code that use them. It also
fixes an additional name space collision between the kernel function
psignal and the libc function of the same name by renaming the kernel
psignal kern_psignal(). By introducing this change now we will ease future
MFCs that change syscalls.

Reviewed by:	rwatson
Approved by:	re (bz)
2011-09-16 13:58:51 +00:00
John Baldwin
34c1c5992f Set various POSIX capability sysctls to the version of the API that is
supported rather than 1.  They are supposed to return a suitable value
for sysconf(3).  While here, make the fsync sysctl match <unistd.h>.

MFC after:	1 week
2010-11-19 17:56:16 +00:00
David Xu
931e4573df - kern_sched_rr_get_interval should return interval for thread 1 in
target process.
- eliminate a goto.

MFC after: 1 week
2010-09-29 07:31:05 +00:00
Jeff Roberson
6617724c5f Remove kernel support for M:N threading.
While the KSE project was quite successful in bringing threading to
FreeBSD, the M:N approach taken by the kse library was never developed
to its full potential.  Backwards compatibility will be provided via
libmap.conf for dynamically linked binaries and static binaries will
be broken.
2008-03-12 10:12:01 +00:00
Julian Elischer
431f890614 generally we are interested in what thread did something as
opposed to what process. Since threads by default have teh name of the
process unless over-written with more useful information, just print the
thread name instead.
2007-11-14 06:21:24 +00:00
Jeff Roberson
05dc0eb204 - Restore historical sched_yield() behavior by changing sched_relinquish()
to simply switch rather than lowering priority and switching.  This allows
   threads of equal priority to run but not lesser priority.

Discussed with:	davidxu
Reported by:	NIIMI Satoshi <sa2c@sa2c.net>
Approved by:	re
2007-10-08 23:45:24 +00:00
Robert Watson
873fbcd776 Further system call comment cleanup:
- Remove also "MP SAFE" after prior "MPSAFE" pass. (suggested by bde)
- Remove extra blank lines in some cases.
- Add extra blank lines in some cases.
- Remove no-op comments consisting solely of the function name, the word
  "syscall", or the system call name.
- Add punctuation.
- Re-wrap some comments.
2007-03-05 13:10:58 +00:00
Robert Watson
0c14ff0eb5 Remove 'MPSAFE' annotations from the comments above most system calls: all
system calls now enter without Giant held, and then in some cases, acquire
Giant explicitly.

Remove a number of other MPSAFE annotations in the credential code and
tweak one or two other adjacent comments.
2007-03-04 22:36:48 +00:00
Tom Rhodes
bdd04ab184 Update #includes list. 2006-11-11 16:19:12 +00:00
Robert Watson
acd3428b7d Sweep kernel replacing suser(9) calls with priv(9) calls, assigning
specific privilege names to a broad range of privileges.  These may
require some future tweaking.

Sponsored by:           nCircle Network Security, Inc.
Obtained from:          TrustedBSD Project
Discussed on:           arch@
Reviewed (at least in part) by: mlaier, jmg, pjd, bde, ceri,
                        Alex Lyashkov <umka at sevcity dot net>,
                        Skip Ford <skip dot ford at verizon dot net>,
                        Antoine Brodin <antoine dot brodin at laposte dot net>
2006-11-06 13:42:10 +00:00
David Xu
24af5900eb Backout the feature which can change thread's scheduling option, I really
don't want to mix process and thread scheduling options together in these
functions, now the thread scheduling option is implemented in new thr
syscalls.
2006-07-13 06:41:26 +00:00
David Xu
006faeb831 Oops, remove debugger line. 2006-07-11 06:15:46 +00:00
David Xu
65343c788c Extended the POSIX scheduler APIs to accept lwpid as well, we've already
done this in ptrace syscall, when a pid is large than PID_MAX, the syscall
will search a thread in current process. It permits 1:1 thread library to
get and set a thread's scheduler attributes.
2006-07-11 06:11:34 +00:00
David Xu
f705bbe8b1 Don't allow non-root user to set a scheduler policy, otherwise this could
be a local DOS.

Submitted by: Diane Bruce at db at db.net
2006-05-21 00:40:38 +00:00
David Xu
f6c040a2c5 Style fixes.
Submitted by: Diane Bruce < db at db dot net >
2006-05-19 06:37:24 +00:00
David Xu
e631cff309 Use proc lock to prevent a thread from exiting, Giant was no longer used to
protect thread list.
2006-04-10 04:55:59 +00:00
John Baldwin
fe24ab5fc5 Actually commit the code for kern_sched_get_rr_interval(). 2005-03-31 22:54:48 +00:00
Warner Losh
60727d8b86 /* -> /*- for license, minor formatting changes 2005-01-07 02:29:27 +00:00
David E. O'Brien
f4636c5959 Use __FBSDID(). 2003-06-11 06:34:30 +00:00
Alfred Perlstein
a11acc6f8a Use copyout to access user memory.
Submittted by: pho
MFC After: 2 days
2003-01-07 20:10:04 +00:00
Alfred Perlstein
b565fb9e6f headers should not really include "opt_foo.h" (in this case opt_posix.h).
remove it from the header and add it to the files that require it.
2002-11-15 22:55:06 +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
Julian Elischer
079b7badea Pre-KSE/M3 commit.
this is a low-functionality change that changes the kernel to access the main
thread of a process via the linked list of threads rather than
assuming that it is embedded in the process. It IS still embeded there
but remove all teh code that assumes that in preparation for the next commit
which will actually move it out.

Reviewed by: peter@freebsd.org, gallatin@cs.duke.edu, benno rice,
2002-02-07 20:58:47 +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
Matthew Dillon
2afac34da3 Make various posix4 system calls MPSAFE (will fixup syscalls.master later)
sched_setparam()
    sched_getparam()
    sched_setscheduler()
    sched_getscheduler()
    sched_yield()
    sched_get_priority_max()
    sched_get_priority_min()
    sched_rr_get_interval()
2001-08-31 22:34:40 +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
Robert Watson
e84b7987bc o Unfold p31b_proc() into the individual posix4 system calls so as to
allow call-specific authorization.
o Modify the authorization model so that p_can() is used to check
  scheduling get/set events, using P_CAN_SEE for gets, and P_CAN_SCHED
  for sets.  This brings the checks in line with get/setpriority().

Obtained from:	TrustedBSD Project
2001-06-30 07:55:19 +00:00
Robert Watson
1af55356f8 Replace some use of 'p' with 'targetp' so as to not scarily overload the
passed 'p' argument.  No functional change.

Obtained from:	USENIX Emporium, Cheap Tricks Department
2001-06-30 03:13:36 +00:00
Robert Watson
64e55bf47b Remove a fascinating but confusing construct involving chaining
conditional clauses in the following way:

	(0 || a || b);

No functional change.
2001-06-28 23:02:09 +00:00
Robert Watson
e8f7a95298 Add error checking for copyin() operations in posix4 scheduling code. 2001-06-28 22:53:42 +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
Robert Watson
29b2efeb6b o First step in cleaning up authorization code for the posix4
implementation.  Move from direct uid 0 comparision to using suser_xxx()
  call with the same semantics.  Simplify CAN_AFFECT() macro as passed
  pcred was redundant.  The checks here still aren't "right", but they
  are probably "better".

Obtained from:	TrustedBSD Project
2001-05-06 16:15:42 +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
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
Peter Wemm
365c5db0a7 Add $FreeBSD$ 2000-05-01 20:32:07 +00:00
Peter Wemm
e91896117b Well folks, this is it - The second stage of the removal for build support
for LKM's..
1999-04-17 08:36:07 +00:00
Peter Dufault
ce47711dee Set PAGE_SIZE for _SC_PAGESIZE sysconf(). 1998-06-01 21:54:43 +00:00
Peter Dufault
aebde78243 1. Add new defs for mins and maxs for the POSIX flavor priorities. They
end up being the same, but it doesn't look like you're comparing
apples and oranges.

2. Use need_resched instead of reset_priority.  This isn't right
either, since for example you'll round-robin against equal priority FIFO
processes when lowering the priority of another process,
but this works better and a real fix needs to be in kern_synch and
not out here.

3. This is not a device driver: copyin/copyout the structure.
1998-05-19 21:11:53 +00:00
Peter Dufault
2a61a11038 1. Don't use "nosys" and generate coredumps for unconfigured
system calls - return ENOSYS per the spec.

2. Fix interface stub to set priority properly.
1998-05-18 12:53:45 +00:00
Peter Dufault
8a6472b723 Finish _POSIX_PRIORITY_SCHEDULING. Needs P1003_1B and
_KPOSIX_PRIORITY_SCHEDULING options to work.  Changes:

Change all "posix4" to "p1003_1b".  Misnamed files are left
as "posix4" until I'm told if I can simply delete them and add
new ones;

Add _POSIX_PRIORITY_SCHEDULING system calls for FreeBSD and Linux;

Add man pages for _POSIX_PRIORITY_SCHEDULING system calls;

Add options to LINT;

Minor fixes to P1003_1B code during testing.
1998-03-28 11:51:01 +00:00