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freebsd-skq/sys/geom/geom_int.h

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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
/*-
* Copyright (c) 2002 Poul-Henning Kamp
* Copyright (c) 2002 Networks Associates Technology, Inc.
* All rights reserved.
*
* This software was developed for the FreeBSD Project by Poul-Henning Kamp
* and NAI Labs, the Security Research Division of Network Associates, Inc.
* under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
* DARPA CHATS research program.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The names of the authors may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
LIST_HEAD(class_list_head, g_class);
TAILQ_HEAD(g_tailq_head, g_geom);
TAILQ_HEAD(event_tailq_head, g_event);
extern struct event_tailq_head events;
Commit the correct copy of the g_stat structure. Add debug.sizeof.g_stat sysctl. Set the id field of the g_stat when we create consumers and providers. Remove biocount from consumer, we will use the counters in the g_stat structure instead. Replace one field which will need to be atomically manipulated with two fields which will not (stat.nop and stat.nend). Change add companion field to bio_children: bio_inbed for the exact same reason. Don't output the biocount in the confdot output. Fix KASSERT in g_io_request(). Add sysctl kern.geom.collectstats defaulting to off. Collect the following raw statistics conditioned on this sysctl: for each consumer and provider { total number of operations started. total number of operations completed. time last operation completed. sum of idle-time. for each of BIO_READ, BIO_WRITE and BIO_DELETE { number of operations completed. number of bytes completed. number of ENOMEM errors. number of other errors. sum of transaction time. } } API for getting hold of these statistics data not included yet.
2003-02-07 23:08:24 +00:00
extern int g_collectstats;
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
extern int g_debugflags;
Implement a handle for efficient implementation of perforations in lower extremities. Setting bit 4 in debugflags (sysctl kern.geom.debugflags=16) will allow any open to succeed on rank#1 providers. This will generally correspond to the physical disk devices: ad0, da0, md0 etc. This fundamentally violates the mechanics of GEOMs autoconfiguration, and is only provided as a debugging facility, so obviously error reports on GEOM where this bit is or has been set will not be accepted.
2003-02-12 09:48:27 +00:00
/*
* 1 G_T_TOPOLOGY
* 2 G_T_BIO
* 4 G_T_ACCESS
Mitigate deadlock situation pending a more complete solution.
2003-03-21 22:05:33 +00:00
* 8 Enable sanity checks
Implement a handle for efficient implementation of perforations in lower extremities. Setting bit 4 in debugflags (sysctl kern.geom.debugflags=16) will allow any open to succeed on rank#1 providers. This will generally correspond to the physical disk devices: ad0, da0, md0 etc. This fundamentally violates the mechanics of GEOMs autoconfiguration, and is only provided as a debugging facility, so obviously error reports on GEOM where this bit is or has been set will not be accepted.
2003-02-12 09:48:27 +00:00
* 16 Allow footshooting on rank#1 providers
Mitigate deadlock situation pending a more complete solution.
2003-03-21 22:05:33 +00:00
* 32 G_T_DETAILS
Implement a handle for efficient implementation of perforations in lower extremities. Setting bit 4 in debugflags (sysctl kern.geom.debugflags=16) will allow any open to succeed on rank#1 providers. This will generally correspond to the physical disk devices: ad0, da0, md0 etc. This fundamentally violates the mechanics of GEOMs autoconfiguration, and is only provided as a debugging facility, so obviously error reports on GEOM where this bit is or has been set will not be accepted.
2003-02-12 09:48:27 +00:00
*/
Mitigate deadlock situation pending a more complete solution.
2003-03-21 22:05:33 +00:00
#define G_F_DISKIOCTL 64
Remove some debugging in the new OAM[*] and add a debug flag for other parts of it. [*] I've been asked what "OAM" means: It's an acronym used in the telecom industry, "Operations And Maintenance", and there it covers anything from a single unlabeled led on the frontpanel the the full nightmare of CMIP for SS7.
2003-03-31 18:35:37 +00:00
#define G_F_CTLDUMP 128
Mitigate deadlock situation pending a more complete solution.
2003-03-21 22:05:33 +00:00
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
/*
* Various internal actions are tracked by tagging g_event[s] onto
* an internal eventqueue.
*/
enum g_events {
EV_NEW_CLASS, /* class */
EV_NEW_PROVIDER, /* provider */
EV_SPOILED, /* provider, consumer */
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
EV_CALL_ME, /* func, arg */
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
EV_LAST
};
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
#define G_N_EVENTREFS 20
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
struct g_event {
enum g_events event;
TAILQ_ENTRY(g_event) events;
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
void *arg;
g_call_me_t *func;
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
void *ref[G_N_EVENTREFS];
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
};
Move #defines of major/minor to internal header file so other bits can share and coordinate with geom_dev.
2003-02-08 12:30:12 +00:00
/*
* We actually have a number of drivers sharing the same major number
* so we coordinate the major/minor usage here
*/
#define GEOM_MAJOR 4
#define GEOM_MINOR_STATS 0
#define GEOM_MINOR_PROVIDERS 10
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
/* geom_dump.c */
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
void g_confxml(void *, int flag);
Properly isolate the locking domains of sysctl from the topology lock for the sysctls which report the configuration. Sponsored by: DARPA & NAI Labs.
2002-10-04 10:38:36 +00:00
void g_conf_specific(struct sbuf *sb, struct g_class *mp, struct g_geom *gp, struct g_provider *pp, struct g_consumer *cp);
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
void g_confdot(void *, int flag);
void g_conftxt(void *, int flag);
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
/* geom_event.c */
void g_event_init(void);
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
void g_post_event(enum g_events ev, ...);
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
void g_run_events(void);
Introduce an SX lock which allows us to stall event processing during OAM operations.
2003-03-23 21:58:09 +00:00
void g_stall_events(void);
void g_release_events(void);
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
/* geom_subr.c */
s/classs/classes/ to fixup grammer after the previous global renaming. Sponsored by: DARPA & NAI Labs
2002-04-04 09:41:47 +00:00
extern struct class_list_head g_classes;
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
extern char *g_wait_event, *g_wait_sim, *g_wait_up, *g_wait_down;
/* geom_io.c */
void g_io_init(void);
void g_io_schedule_down(struct thread *tp);
void g_io_schedule_up(struct thread *tp);
/* geom_kern.c / geom_kernsim.c */
void g_init(void);
Move the shutdown eventhandler stuff to a more logical place.
2003-04-23 19:15:27 +00:00
extern int g_shutdown;
Turn /dev/geom.ctl from a GEOM class into a plain character device driver instead, it will never see a disk-I/O transaction, so this is a lot simpler.
2003-03-24 13:37:15 +00:00
/* geom_ctl.c */
void g_ctl_init(void);
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