Commit Graph

81 Commits

Author SHA1 Message Date
thorpej 69d28474b7 PHOLD/PRELE around uvm_io() to user address space is unnecessary. There
is nothing in the U-area that we need.
2000-09-26 23:59:23 +00:00
bjh21 cf9703617a Conditionalise the declaration of sysctl_pty() so that we don't get a
compiler warning in the NPTY==0 case.
2000-09-23 11:33:05 +00:00
thorpej e0797e1775 Fix 0 vs. NULL confusion. 2000-09-11 18:45:29 +00:00
jdolecek ae3a3247bb handle KERN_MAXPTYS via new sysctl_pty(), which uses pty_maxptys() provided
by tty_pty.c
2000-09-10 17:29:50 +00:00
jdolecek 1ef0c139f9 allocate pty kernel structures on demand at run-time - this allows
to support arbitrary number of ptys without need of kernel recompile
(the extra device special files in /dev/ still need to be created, of course)

upper limit of supported ptys is controlled via new sysctl variable
kern.maxptys (KERN_MAXPTYS), which is raise-only and defaults to 512.
2000-09-09 16:42:04 +00:00
thorpej 414765c253 In fill_kproc2(), testing p->p_stats != NULL doesn't do much good,
instead test for (p->p_flag & I_INMEM), and don't access the U-area
(via p->p_stats) if that bit is clear.  Fixes the hangs people have
seen when the system is paging and the user runs top/ps/w.
2000-08-08 23:42:07 +00:00
thorpej 195bf5c09f - Fix the likely cause of the "ps(1) hangs machine" problem. Always
vslock the user pages for the data being copied out to userspace,
  so that we won't sleep while holding a lock in case we need to
  fault the pages in.
- Sprinkle some const and ANSI'ify some things while here.
2000-07-14 07:21:21 +00:00
simonb b10a1b69be Add a KERN_CONSDEV sysctl that returns cn_tab->cn_dev (if cn_tab is not
NULL).
2000-07-13 14:26:43 +00:00
simonb cd36ac22df Add #ifdef checks for SYSVMSG, SYSVSEM and SYSVSHM in more places to catch
when some but not all of the SysV IPC facilities are configured.
Problem noticed by Phil Nelson.
2000-06-16 00:57:04 +00:00
simonb 00d1b6b147 Add a KERN_MSGBUF sysctl to return the message buffer. 2000-06-16 00:18:09 +00:00
simonb e907fee281 In the KERN_GETPROC* handler:
* Handle KERN_PROC_SESSION that has been defined in <sys/sysctl.h> from
  day one.
* Add handlers for KERN_PROC_GID and KERN_PROC_RGID.
* If "op" doesn't valid, return EINVAL.
2000-06-13 01:27:00 +00:00
thorpej 5b281c5932 Move schedticks and cp_time into schedstate_percpu. Also, allow
non-primary CPUs to call hardclock(), but make them bail about
before updating global timekeeping state (that's the job of the
primary CPU).
2000-06-03 20:42:42 +00:00
simonb 38cc1b3975 Add new sysctl node "KERN_SYSVIPC_INFO" with "KERN_SYSVIPC_MSG_INFO",
"KERN_SYSVIPC_SEM_INFO" and "KERN_SYSVIPC_SHM_INFO" to return the
info and data structures for the relevent SysV IPC types.  The return
structures use fixed-size types and should be compat32 safe.  All
user-visible changes are protected with
	#if !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE)

Make all variable declarations extern in msg.h, sem.h and shm.h and
add relevent variable declarations to sysv_*.c and remove unneeded
header files from those .c files.

Make compat14 SysV IPC conversion functions and sysctl_file() static.

Change the data pointer to "void *" in sysctl_clockrate(),
sysctl_ntptime(), sysctl_file() and sysctl_doeproc().
2000-06-02 15:53:03 +00:00
pk e1859436f1 Fix lossage when transferring a pointer value into an off_t var. 2000-06-01 18:30:03 +00:00
simonb dbbe2b1dd7 Plug a slow kernel memory leak - a page was lost for each system or
zombie process queried with the KERN_PROC_ARGS sysctl.  Fixed by moving
a malloc call after all possible early return conditions.
2000-06-01 13:36:51 +00:00
thorpej 956b3ca3b3 Track which process a CPU is running/has last run on by adding a
p_cpu member to struct proc.  Use this in certain places when
accessing scheduler state, etc.  For the single-processor case,
just initialize p_cpu in fork1() to avoid having to set it in the
low-level context switch code on platforms which will never have
multiprocessing.

While I'm here, comment a few places where there are known issues
for the SMP implementation.
2000-05-31 05:02:31 +00:00
thorpej 21fc65e1a8 sleep() -> tsleep() 2000-05-27 04:52:27 +00:00
simonb abae45a32c Set *sizep correctly if returning the number of elements. Pointed out
by Anders Magnusson.

Honor elem_count in the KERN_PROC2 case, as well as overall buffer
space.  The only user-land code to use this set the elem_count to
"buffer_space / elem_size", so we've had no incorrect behaviour to date.
2000-05-27 03:24:50 +00:00
thorpej 3bcdc30c81 Adjust kinfo_proc2's p_schedflags assignment to match new reality. 2000-05-26 22:59:31 +00:00
simonb 485b240b6f Add some new sysctls to help abolish the dreaded "proc size mismatch"
errors from ps(1) and some other kernel grovellers, and return some
data that has previously only been accessable with /dev/kmem read
access.  The sysctls are:

 + KERN_PROC2 - return an array of fixed sized "struct kinfo_proc2"
   structures that contain most of the useful user-level data in
   "struct proc" and "struct user".  The sysctl also takes the size of
   each element, so that if "struct kinfo_proc2" grows over time old
   binaries will still be able to request a fixed size amount of data.
 + KERN_PROC_ARGS - return the argv or envv for a particular process id.
   envv will only be returned if the process has the same user id as the
   requestor or if the requestor is root.
 + KERN_FSCALE - return the current kernel fixpt scale factor.
 + KERN_CCPU - return the scheduler exponential decay value.
 + KERN_CP_TIME - return cpu time state counters.

With input and suggestions from many people on tech-kern.
2000-05-26 02:23:12 +00:00
simonb 55bf62c1a1 For the KERN_PROC sysctl, when using KERN_PROC_TTY allow
KERN_PROC_TTY_NODEV to select processes with no controlling
tty and KERN_PROC_TTY_REVOKE to select processes with a
revoked controlling tty.
2000-04-15 04:38:07 +00:00
augustss 264f1d27c6 Get rid of register declarations. 2000-03-30 09:27:11 +00:00
simonb 2f1fef39b3 Centralise the declarations of cpu_model, machine, machine_arch,
osrelease, and ostype and remove "extern char foo[];" (for hostname
and domainname too).

Also delete redunctant decl of boottime in kern_info_43.c.
2000-03-28 23:57:24 +00:00
itojun 959ca07b4b add hw.alignbytes sysctl mib. this gives you the value of ALIGNBYTES
at the kernel compilation time (ALIGNBYTES that the kernel uses).
2000-02-27 06:13:35 +00:00
fair c75556a12f Add kernel logging of processes which exit on signals which can
cause a core to drop, and whether the core dropped, or, if it did
not, why not (i.e. error number). Logs process ID, name, signal that
hit it, and whether the core dump was successful.

logging only happens if kern_logsigexit is non-zero, and it can be
changed by the new sysctl(3) value KERN_LOGSIGEXIT. The name of this
sysctl and its function are taken from FreeBSD, at the suggestion
of Greg Woods in PR 6224. Default behavior is zero for a normal
kernel, and one for a kernel compiled with DIAGNOSTIC.
2000-02-06 07:29:56 +00:00
assar 70aab8de7d (sysctl_doeproc): make sure we release the proclist_lock even if
copyout fails
2000-01-16 15:07:48 +00:00
is 082c2a59eb - strings handled by the common functions sysctl_string() and sysctl_rdstring()
are handled as arrays; that is, a truncated old value is returned, alongside
  with ENOMEM, if the buffer is too small.

- in all int, quad, and single struct cases, and all specials handled inside
  this file, oldlenp semantics are now as documented in the manual page, that
  is, a NULL oldp, but non-NULL oldlenp returns the needed size

[I had to change the oldlenp handling, so I thought I should make it as
 advertized. Formerly, the subroutines would not know when a NULL oldlenp
 was passed, do the work anyway, and the value would be thrown away.]

This is needed as a first step to make gethostname() and getdomainname()
conform to its own manual page and SUSV2. (See pr 7836 by Simon Burge)
1999-11-17 23:24:54 +00:00
is 71d206232b Return the data length even for non-readonly strings, as advertized. 1999-11-12 16:10:16 +00:00
jdolecek 3999099463 proc_sysctl(): initialize ptmp to NULL - theoretically, ptmp might
be used uninitialized when name[0] != PROC_CURPROC and
proclists[0]->pd_list == NULL; actually, this can never happen
(proclists[0] == &allproc), but the compiler can not know this, so it
complains
1999-11-03 09:12:15 +00:00
bouyer 52497e180a Remplace kern.shortcorename sysctl with a more flexible sheme,
core filename format, which allow to change the name of the core dump,
and to relocate it in a directory. Credits to Bill Sommerfeld for giving me
the idea :)
The default core filename format can be changed by options DEFCORENAME and/or
kern.defcorename
Create a new sysctl tree, proc, which holds per-process values (for now
the corename format, and resources limits). Process is designed by its pid
at the second level name. These values are inherited on fork, and the corename
fomat is reset to defcorename on suid/sgid exec.
Create a p_sugid() function, to take appropriate actions on suid/sgid
exec (for now set the P_SUGID flag and reset the per-proc corename).
Adjust dosetrlimit() to allow changing limits of one proc by another, with
credential controls.
1999-09-28 14:47:00 +00:00
kleink c13a492388 1003.1c: add {LOGIN_NAME_MAX}. 1999-09-27 16:24:39 +00:00
thorpej ea8fb3e04a Turn the proclist lock into a read/write spinlock. Update proclist locking
calls to reflect this.  Also, block statclock rather than softclock during
in the proclist locking functions, to address a problem reported on
current-users by Sean Doran.
1999-07-25 06:30:33 +00:00
thorpej 01a8cffe77 Add a read/write lock to the proclists and PID hash table. Use the
write lock when doing PID allocation, and during the process exit path.
Use a read lock every where else, including within schedcpu() (interrupt
context).  Note that holding the write lock implies blocking schedcpu()
from running (blocks softclock).

PID allocation is now MP-safe.

Note this actually fixes a bug on single processor systems that was probably
extremely difficult to tickle; it was possible that schedcpu() would run
off a bad pointer if the right clock interrupt happened to come in the
middle of a LIST_INSERT_HEAD() or LIST_REMOVE() to/from allproc.
1999-07-22 21:08:30 +00:00
thorpej 2715b812d1 Rework the process exit path, in preparation for making process exit
and PID allocation MP-safe.  A new process state is added: SDEAD.  This
state indicates that a process is dead, but not yet a zombie (has not
yet been processed by the process reaper).

SDEAD processes exist on both the zombproc list (via p_list) and deadproc
(via p_hash; the proc has been removed from the pidhash earlier in the exit
path).  When the reaper deals with a process, it changes the state to
SZOMB, so that wait4 can process it.

Add a P_ZOMBIE() macro, which treats a proc in SZOMB or SDEAD as a zombie,
and update various parts of the kernel to reflect the new state.
1999-07-22 18:13:36 +00:00
kleink 7b67bca335 Add compile-time and run-time feature test knobs for the 1003.1 Mapped Files,
Process Memory Locking, Range Memory Locking and Memory Protection options.
1999-06-24 14:18:10 +00:00
thorpej 12347b2657 Make uvm_vslock() return the error code from uvm_fault_wire(). All places
which use uvm_vslock() should now test the return value.  If it's not
KERN_SUCCESS, wiring the pages failed, so the operation which is using
uvm_vslock() should error out.

XXX We currently just EFAULT a failed uvm_vslock().  We may want to do
more about translating error codes in the future.
1999-06-17 15:47:22 +00:00
thorpej 497248ca55 XXX Pass VM_PROT_NONE to uvm_vslock() as access_type. Why are we even
vslocking here?!  copyout() on its own seems to suffice just about everwhere
else, and it's not like the process is going to exit; it's in a system
call!
1999-05-26 01:07:06 +00:00
thorpej 879070ef90 Add support for the kern.mbuf sysctl node. 1999-04-26 21:56:23 +00:00
mrg d2397ac5f7 completely remove Mach VM support. all that is left is the all the
header files as UVM still uses (most of) these.
1999-03-24 05:50:49 +00:00
tron fe8170d1b1 Defopt SYSVMSG, SYSVSEM and SYSVSHM. 1998-10-19 22:19:26 +00:00
thorpej 970e60efb8 - Use proclists[], rather than checking allproc and zombproc explicitly.
- Add some comments about locking.
1998-09-08 23:50:13 +00:00
kleink 5404ba4886 Add support to query the
* availability of POSIX Synchronized I/O (kern.synchronized_io),
* maximum number of iovec structures to be used in readv(2) etc. (kern.iov_max)
via sysctl().
1998-08-03 14:38:20 +00:00
perry 730baa7431 fix sizeofs so they comply with the KNF style guide. yes, it is pedantic. 1998-07-31 22:50:48 +00:00
jonathan 466e784ee1 defopt DDB. 1998-07-04 22:18:13 +00:00
nathanw 30cbf42b77 Implement short corefile name support, controlled by options SHORTCORENAME
and sysctl kern.shortcorename.

Closes PR kern/5191.
1998-06-28 21:34:58 +00:00
kleink 2a4b2482f5 Permit checking the availability of the POSIX File Synchronization Option
(a/k/a fsync(2)), System V style message queues, semaphores and shared memory
at runtime by adding a sysctl variable for each.
1998-05-24 19:52:01 +00:00
thorpej 73863dd3c9 Pass vslock() and vsunlock() a proc *, rather than implicitly operating
on curproc.
1998-04-30 06:28:57 +00:00
fvdl e5bc90f40c Merge with Lite2 + local changes 1998-03-01 02:20:01 +00:00
thorpej d2924ae854 Prevent the session ID from disappearing if the session leader exits
(thus causing s_leader to become NULL) by storing the session ID separately
in the session structure.  Export the session ID to userspace in the
eproc structure.

Submitted by Tom Proett <proett@nas.nasa.gov>.
1998-02-14 00:37:26 +00:00
mrg d90485202c - add defopt's for UVM, UVMHIST and PMAP_NEW.
- remove unnecessary UVMHIST_DECL's.
1998-02-10 14:08:44 +00:00