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52 Commits

Author SHA1 Message Date
Pawel Jakub Dawidek
b8005b9b24 Introduce g_waitidlelock() function which is simlar to g_waitidle(), 
but should be called with the topology lock held and returns with the
topology lock held and empty event queue.

Approved by:	phk (sometime ago)
 2004-11-09 23:20:50 +00:00
Poul-Henning Kamp
9197ce2ee5 Add a new per-thread private flag: TDP_GEOM. 
This flag gets set whenever the thread posts an event on the GEOM
event queue, and if the flag is set when the thread is prepared
to return to userland from the kernel, g_waitidle() will be called
to make sure that the posted events have completed.

This can replace an insufficient number of g_waitidle() calls in
various other places, and has the advantage of being failsafe:  Any
system call which does a VOP_OPEN()/VOP_CLOSE will now correctly
wait for any geom events it posted as part of spoils or tastes.

Assert that topology and Giant is not held in g_waitidle().
 2004-10-23 20:49:17 +00:00
Poul-Henning Kamp
1b464bd889 Make withering water tight. 
When we orphan/wither a provider, an attached geom+consumer could
end up being withered as a result and it may be in front of us in
the normal object scanning order so we need to do multi-pass.  On
the other hand, there may be withering stuff we can't get rid off
(yet), so we need to keep track of both the existence of withering
stuff and if there is more we can do at this time.
 2004-07-08 16:17:14 +00:00
Poul-Henning Kamp
3d1d5bc3c3 Rearrange some of the GEOM debugging tools to be more structured. 
Retire g_sanity() and corresponding debugflag (0x8)

  Retire g_{stall,release}_events().

  Under #ifdef DIAGNOSTIC:

    Make g_valid_obj() an official function and have it return an an
    non-zero integer which indicates the kind of object when found.

    Implement G_VALID_{CLASS,GEOM,CONSUMER,PROVIDER}() macros based
    on g_valid_obj().

    Sprinkle calls to these macros liberally over the infrastructure.

    Always check that we do not free a live object.
 2004-03-10 08:49:08 +00:00
Pawel Jakub Dawidek
18e88d825c Now we have g_topology_assert_not(), so use it to detect deadlocks. 
Approved by:	phk, scottl (mentor)
 2004-02-10 15:55:17 +00:00
Poul-Henning Kamp
793ffa8e55 Don't mingle malloc/g_event flags. 
Spotted by:	pjd@
 2004-02-02 10:58:07 +00:00
Poul-Henning Kamp
57ab2e0468 Make sure to keep track of canceled events. 
Submitted by:	Pawel Jakub Dawidek <nick@garage.freebsd.pl>
 2004-01-23 21:09:38 +00:00
Poul-Henning Kamp
8592d7a760 Prevent withering of the provider we're orphaning from happening until 
we do it ourselves.

Nailed by:	Simon Heath <heath@cng.fr>
 2003-12-23 11:37:05 +00:00
Poul-Henning Kamp
d0265773dc KASSERT against multiple orphanings of providers. 2003-12-07 10:04:43 +00:00
Poul-Henning Kamp
e0d617c1f7 Fix a harmless bug and add a ')' in a debugging printf. 
Submitted by: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>
 2003-11-18 07:54:12 +00:00
Poul-Henning Kamp
b144e6ffeb Destroy providers maked with G_PF_WITHER when the last consumer has detached. 2003-10-12 11:34:35 +00:00
David E. O'Brien
50b1faef38 Use __FBSDID(). 
Approved by:	phk
 2003-06-11 06:49:16 +00:00
Poul-Henning Kamp
a1a9b44569 Add missing va_end() calls. 
Noticed by:	tmm
 2003-06-07 10:16:53 +00:00
Poul-Henning Kamp
9dfffbc959 Get rid of trivial function g_destroy_event(). 2003-05-02 05:26:19 +00:00
Poul-Henning Kamp
c8589ad169 Add a new flag, EV_CANCELED, and use it to make g_waitfor_event() return 
EAGAIN if an event got canceled.
 2003-05-01 19:43:52 +00:00
Poul-Henning Kamp
2ab31b05ba When events on a reference is cancelled, check our doorstep first, 
it might be an orphan.
 2003-05-01 19:24:00 +00:00
Poul-Henning Kamp
0a9c130c06 Introduce a g_waitfor_event() function which posts an event and waits for 
it to be run (or cancelled) and use this instead of home-rolled versions.
 2003-04-23 21:28:27 +00:00
Poul-Henning Kamp
a974614b05 More of the event stuff can now be private to geom_event.c 2003-04-23 20:54:42 +00:00
Poul-Henning Kamp
8cd1535a24 Rename g_call_me() to g_post_event(), and give it a flag 
argument to determine if we can M_WAITOK in malloc.
 2003-04-23 20:46:12 +00:00
Poul-Henning Kamp
d98777f8db Remove the now unused hardcoded g_post_event() event support. 2003-04-23 20:25:33 +00:00
Poul-Henning Kamp
9ab3ea7841 Turn EV_NEW_PROVIDER into a g_call_me() event. 2003-04-23 20:16:13 +00:00
Poul-Henning Kamp
f2e9a09494 Convert EV_SPOILED event to use g_call_me(). 2003-04-23 20:06:38 +00:00
Poul-Henning Kamp
9972896c00 Turn the hardwired NEW_CLASS event into a g_call_me() event. 2003-04-23 19:34:38 +00:00
Poul-Henning Kamp
b5cba4167f Move the shutdown eventhandler stuff to a more logical place. 2003-04-23 19:15:27 +00:00
Poul-Henning Kamp
3924ad705e Time has run from the "run GEOM in userland" harness, and the new regression 
test is built to test GEOM as running in the kernel.

This commit is basically "unifdef -D_KERNEL" to remove the mainly #include
related code to support the userland-harness.
 2003-04-13 09:02:06 +00:00
Poul-Henning Kamp
2b454c0ae5 Fix a bug which resulted in orphanization getting confused every now 
and then.
 2003-04-12 16:36:19 +00:00
Poul-Henning Kamp
316aed030e Add handling for cancelled events in the g_call_me() methods. 2003-04-02 21:10:04 +00:00
Poul-Henning Kamp
afcbcfaed0 Change events to have an array of "void *" references, and give the 
event posting functions varargs to fill these.

Attribute g_call_me() to appropriate g_geom's where necessary.

Add a flag argument to g_call_me() methods which will be used to signal
cancellation of events in the future.

This commit should be a no-op.
 2003-04-02 20:41:18 +00:00
Poul-Henning Kamp
fbf79df3b8 Save a lock: Grab the stall_events SX lock exclusively so it also serialize 
OAM reqests.
 2003-03-24 13:35:06 +00:00
Poul-Henning Kamp
dddc28bfe0 Introduce g_cancel_events() and use it a couple of places where it makes 
sense.
 2003-03-23 23:01:40 +00:00
Poul-Henning Kamp
d943f1b0b9 Introduce an SX lock which allows us to stall event processing 
during OAM operations.
 2003-03-23 21:58:09 +00:00
Poul-Henning Kamp
20d2026b4e #ifdef notyet a bit of code which needs not yet committed refcounting to 
work correctly.
 2003-03-16 16:29:04 +00:00
Poul-Henning Kamp
e582990901 If we run out of consumers while orphaning them, and the provider's geom 
is withering, destroy the provider when done.

This was exposed by the recent change to geom_dev's orphaning logic.
 2003-03-10 23:41:41 +00:00
Poul-Henning Kamp
f48b881942 Stamp out Danglish. 2003-03-09 10:02:31 +00:00
Warner Losh
a163d034fa Back out M_* changes, per decision of the TRB. 
Approved by: trb
 2003-02-19 05:47:46 +00:00
Alfred Perlstein
44956c9863 Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0. 
Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT.
 2003-01-21 08:56:16 +00:00
Poul-Henning Kamp
abb50a48e8 Remove g_silence(). It does not do anything anymore. 2003-01-13 08:46:32 +00:00
Poul-Henning Kamp
a9ed5e1173 Polish a bit here and there. 
Reenable the geom.ctl device so people can play with gbde.

Sponsored by:	DARPA & NAI Labs
 2002-11-04 09:31:02 +00:00
Poul-Henning Kamp
cd4f50fbb8 Make sure we don't loose our topology lock in a call_me() handler. 
Sponsored by:	DARPA & NAI Labs.
 2002-09-30 08:27:29 +00:00
Poul-Henning Kamp
346cd5fe2d Implement g_call_me() as a way for geom methods to schedule operations 
to be performed in the event-thread.

To do this, we need to lock the eventlist with g_eventlock (nee g_doorlock),
since g_call_me() being called from the UP/DOWN paths will not be able to
aquire g_topology_lock.

This also means that for now these events are not referenced on any
particular consumer/provider/geom.

For UP/DOWN path use, this will not become a problem since the access()
function will make sure we drain any bio's before we dismantle.

Sponsored by:   DARPA & NAI Labs.
 2002-09-27 20:38:36 +00:00
Poul-Henning Kamp
e615b0fd93 Ok, include also the two tests which actually does effect the claims 
of the last commit message.

Sponsored by:	DARPA & NAI Labs.
 2002-09-27 20:30:27 +00:00
Poul-Henning Kamp
ed0ff8e52d Hook into the shutdown EVENTHANDLER and stop tasting things after we 
get notified to make things settle a bit faster.

Sponsored by:	DARPA & NAI Labs.
 2002-09-27 20:23:35 +00:00
Poul-Henning Kamp
903e43fe66 Rename the doorlock to eventlock, it gets to protect a bit more in the future. 
Sponsored by:	DARPA & NAI Labs.
 2002-09-27 20:18:16 +00:00
Poul-Henning Kamp
503abe4540 Improve some on the naming. 
Submitted by:	iedowse
 2002-06-09 10:57:34 +00:00
Poul-Henning Kamp
855f8b26f2 Only clear the spoiled flag if the class had no spoiled method, the spoiled 
method may have deallocated the consumer already and modifying free()'ed
memory is bad style.

Sponsored by: DARPA & NAI Labs.
 2002-05-26 17:17:25 +00:00
Poul-Henning Kamp
4b8374a778 Don't grab Giant around malloc(9) and free(9). 
Don't grab Giant around wakeup(9).
Don't print verbose messages about each device found in geom_dev.
Various cleanups.

Sponsored by: DARPA & NAI Labs.
 2002-05-20 10:03:15 +00:00
John Baldwin
6008862bc2 Change callers of mtx_init() to pass in an appropriate lock type name. In 
most cases NULL is passed, but in some cases such as network driver locks
(which use the MTX_NETWORK_LOCK macro) and UMA zone locks, a name is used.

Tested on:	i386, alpha, sparc64
 2002-04-04 21:03:38 +00:00
Poul-Henning Kamp
07d77fc610 Move access and orphan member functions from class to geom. 
Sponsored by: DARPA & NAI Labs
 2002-04-04 09:54:13 +00:00
Poul-Henning Kamp
2654e1fc4e s/classs/classes/ to fixup grammer after the previous global renaming. 
Sponsored by: DARPA & NAI Labs
 2002-04-04 09:41:47 +00:00
Poul-Henning Kamp
b1876192f0 Eliminate some thread pointers which do not make sense anymore. 
Split private parts of geom.h into geom_int.h.  The latter should
never be included in class implemtations.
 2002-03-26 22:07:38 +00:00