Commit Graph

64 Commits

Author SHA1 Message Date
ad 284c2b9aef Merge proc::p_mutex and proc::p_smutex into a single adaptive mutex, since
we no longer need to guard against access from hardware interrupt handlers.

Additionally, if cloning a process with CLONE_SIGHAND, arrange to have the
child process share the parent's lock so that signal state may be kept in
sync. Partially addresses PR kern/37437.
2008-04-24 18:39:20 +00:00
mrg 5e0e0b0a59 need <sys/atomic.h> now. 2008-03-18 02:49:15 +00:00
rmind 33928e0f83 - Replace uihashtbl_lock and struct uidinfo::ui_lock with atomic operations.
This make uid_find(), chgproccnt(), chgsbsize() and lf_alloc(), lf_free()
  functions lock-less.
- Increase the size of uihashtbl in case of MP system, as suggested by <ad>.
- Add HASH_SLIST type for hashinit().

Reviewed by <ad>.
2008-03-17 21:16:03 +00:00
ad 4a780c9ae2 Merge vmlocking2 to head. 2008-01-02 11:48:20 +00:00
ad 88ab7da936 Merge some of the less invasive changes from the vmlocking branch:
- kthread, callout, devsw API changes
- select()/poll() improvements
- miscellaneous MT safety improvements
2007-07-09 20:51:58 +00:00
ad 59d979c5f1 Pass an ipl argument to pool_init/POOL_INIT to be used when initializing
the pool's lock.
2007-03-12 18:18:22 +00:00
christos 53524e44ef Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
ad b07ec3fc38 Merge newlock2 to head. 2007-02-09 21:55:00 +00:00
christos 35ca6c8b5b Fix all the -D*DEBUG* code that it was rotting away and did not even compile.
Mostly from Arnaud Lacombe, many thanks!
2006-08-17 17:11:27 +00:00
ad f474dceb13 Use the LWP cached credentials where sane. 2006-07-23 22:06:03 +00:00
yamt 0f0124d1a9 remove NOLOCKF and use normal NULL instead. 2006-05-20 12:20:55 +00:00
yamt b22546608e remove an debug printf slipped into the previous. 2006-05-20 12:19:30 +00:00
yamt a6518311cc fix F_SETLKW deadlock detection, which has been broken since lwpify.
although this doesn't work for processes with multiple lwps, it's better
than not working at all.
2006-05-20 12:06:20 +00:00
yamt cecc761849 make lockfpool static. 2006-05-20 12:04:21 +00:00
yamt 408b7c1e5c move lockf implementation details from sys/lockf.h to kern/vfs_lockf.c. 2006-05-20 12:02:47 +00:00
elad 215bd95ba4 integrate kauth. 2006-05-14 21:15:11 +00:00
perry a2cd732268 Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete. 2005-12-24 19:12:23 +00:00
christos 95e1ffb156 merge ktrace-lwp. 2005-12-11 12:16:03 +00:00
christos e30fd207ff use ap->a_flags instead of fl->f_type; pointed out by: Devon H. O'Dell 2005-10-28 15:37:23 +00:00
thorpej 30fe14b30e Re-arrange slighty, eliminate prototypes that are unnecessary when using
ANSI function decls with "static".
2005-06-05 23:10:25 +00:00
christos efb6943313 - add const.
- remove unnecessary casts.
- add __UNCONST casts and mark them with XXXUNCONST as necessary.
2005-05-29 22:24:14 +00:00
christos 7cdea212c0 No 0x in front of %p... 2005-05-22 15:54:45 +00:00
christos 6919a4b65c don't unlock twice. 2005-05-09 23:40:20 +00:00
christos 3b37af53b0 lock all uses of uidhash. provide macros to lock and unlock. based on more
discussions with yamt.
2005-05-09 11:10:07 +00:00
christos 761bd09636 PR/30154: YAMAMOTO Takashi: tcp_close locking botch
chgsbsize() as mentioned in the PR can be called from an interrupt context
via tcp_close(). Avoid calling uid_find() in chgsbsize().
- Instead of storing so_uid in struct socketvar, store *so_uidinfo
- Add a simple lock to struct uidinfo.
2005-05-07 17:42:09 +00:00
christos b279845eed Don't free the wrong lock. Pointed out by Konrad Schroder 2005-03-25 22:48:23 +00:00
christos cb282cd325 Keep track and limit the number of locks per uid. From OpenBSD 2005-03-20 19:16:33 +00:00
perry da8abec863 nuke trailing whitespace 2005-02-26 21:34:55 +00:00
peter 5dc9788b36 Fix a typo, dependancy -> dependency
ok wiz@
2004-11-19 14:18:53 +00:00
simonb b5d0e6bf06 Initialise (most) pools from a link set instead of explicit calls
to pool_init.  Untouched pools are ones that either in arch-specific
code, or aren't initialiased during initial system startup.

 Convert struct session, ucred and lockf to pools.
2004-04-25 16:42:40 +00:00
christos cb02efca51 fix uninitialized variable 2003-10-25 09:06:51 +00:00
agc aad01611e7 Move UCB-licensed code from 4-clause to 3-clause licence.
Patches provided by Joel Baker in PR 22364, verified by myself.
2003-08-07 16:26:28 +00:00
yamt 200e944501 revert rev.1.28. (free -> FREE changes)
pointed by David Laight on source-changes about similar changes.
2003-06-25 14:34:55 +00:00
fvdl c5b60c55a3 Make gcc3 happy ("label at end of compound statement"). 2003-05-03 15:02:54 +00:00
yamt d056e8ce9a get pointer to v_interlock directly
as we are not interested in the rest of the vnode here.
2003-05-03 11:19:05 +00:00
yamt 300627c9c0 - KNF.
- remove unneeded caddr_t casts.
2003-05-01 15:25:06 +00:00
yamt 8565905ff8 use FREE instead of free for MALLOC'ed memory. 2003-05-01 14:59:51 +00:00
yamt 99411362c0 MP locking. 2003-05-01 14:36:43 +00:00
yamt a2e9a85481 remove a part of comment that isn't true anymore. 2003-05-01 13:14:49 +00:00
yamt 31dc0f47c6 ANSIfy. 2003-05-01 13:06:59 +00:00
yamt 4d5238a439 don't export lockf internal functions. 2003-05-01 12:49:16 +00:00
mycroft adddd74e0e DANGER WILL ROBINSON!
We cannot store LWP pointers permanently in lock structures, for two reasons:
1) They are somewhat ephemeral.  Dangling pointers are bad.
2) A different LWP may issue the unlock, and in this case, we were not actually
   doing the unlock at all.  This was causing processes to exit without undoing
   fcntl(2) locks.  Furthermore, the locks are process-specific to begin with,
   so the test was just plain wrong.

Instead, we go back to storing a proc pointer for POSIX locks.  In addition, we
add an extra pointer to the LWP, which is used in deadlock detection.  After
the lock is granted, this pointer is 0ed and there is no reference to the LWP.

Now evolution can inc my mail again.
2003-03-05 18:28:22 +00:00
thorpej b193480908 Add extensible malloc types, adapted from FreeBSD. This turns
malloc types into a structure, a pointer to which is passed around,
instead of an int constant.  Allow the limit to be adjusted when the
malloc type is defined, or with a function call, as suggested by
Jonathan Stone.
2003-02-01 06:23:35 +00:00
thorpej e0d8d366df Merge the nathanw_sa branch. 2003-01-18 10:06:22 +00:00
simonb 9c8f3f4a77 "ovcase" is set but not used in lf_getblock(); remove it. 2002-10-22 03:32:17 +00:00
matt 48bbf5f234 Use the queue macros from <sys/queue.h> instead of referring to the queue
members directly.  Use *_FOREACH whenever possible.
2002-09-04 01:32:31 +00:00
lukem adc783d537 add RCSIDs 2001-11-12 15:25:01 +00:00
jdolecek b0fb24279c change the lf_advlock() arguments from
int     lf_advlock __P((struct lockf **,
           off_t, caddr_t, int, struct flock *, int));
to

int     lf_advlock __P((struct vop_advlock_args *, struct lockf **, off_t));

This matches common usage and is also compatible with similar change
in FreeBSD (though they use u_quad_t as last arg).
2000-07-22 15:26:11 +00:00
sommerfeld c0011ad705 Fix several problems with lockf/fcntl byte range locks:
- document a data structure invariant in lockf.h
 - add KASSERT() to check the invariant.
 - be more consistent about dequeuing ourselves from the blocked list
after a tsleep().
 - Fix two places where the invariant is violated.
 - correct a few comments here and there
 - If we're still following a lock dependancy chain after maxlockdepth
processes and haven't gotten back to the start, assume that we're in a
cycle anyway and return EDEADLK.

Fix is a superset of an existing fix in FreeBSD, but independantly
derived.

Fixes kern/3860.
2000-06-12 14:33:04 +00:00
augustss 264f1d27c6 Get rid of register declarations. 2000-03-30 09:27:11 +00:00