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NetBSD/sys/dev/raidframe/rf_driver.c

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/* $NetBSD: rf_driver.c,v 1.2 1998/11/13 13:45:15 drochner Exp $ */
/*
* Copyright (c) 1995 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Mark Holland, Khalil Amiri, Claudson Bornstein, William V. Courtright II,
* Robby Findler, Daniel Stodolsky, Rachad Youssef, Jim Zelenka
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
/******************************************************************************
*
* rf_driver.c -- main setup, teardown, and access routines for the RAID driver
*
* all routines are prefixed with rf_ (raidframe), to avoid conficts.
*
******************************************************************************/
/*
* :
* Log: rf_driver.c,v
* Revision 1.147 1996/08/21 04:12:46 jimz
* added hook for starting out req_hist w/ more distributed values
* (currently not done)
*
* Revision 1.146 1996/07/29 14:05:12 jimz
* fix numPUs/numRUs confusion (everything is now numRUs)
* clean up some commenting, return values
*
* Revision 1.145 1996/07/28 20:31:39 jimz
* i386netbsd port
* true/false fixup
*
* Revision 1.144 1996/07/27 18:40:24 jimz
* cleanup sweep
*
* Revision 1.143 1996/07/22 21:11:53 jimz
* fix formatting on DoAccess error msg
*
* Revision 1.142 1996/07/19 16:10:06 jimz
* added call to rf_ResetDebugOptions() in rf_ConfigureDebug()
*
* Revision 1.141 1996/07/18 22:57:14 jimz
* port simulator to AIX
*
* Revision 1.140 1996/07/17 21:00:58 jimz
* clean up timer interface, tracing
*
* Revision 1.139 1996/07/15 05:40:41 jimz
* some recon datastructure cleanup
* better handling of multiple failures
* added undocumented double-recon test
*
* Revision 1.138 1996/07/11 19:08:00 jimz
* generalize reconstruction mechanism
* allow raid1 reconstructs via copyback (done with array
* quiesced, not online, therefore not disk-directed)
*
* Revision 1.137 1996/07/10 22:28:00 jimz
* get rid of obsolete row statuses (dead,degraded2)
*
* Revision 1.136 1996/06/17 14:38:33 jimz
* properly #if out RF_DEMO code
* fix bug in MakeConfig that was causing weird behavior
* in configuration routines (config was not zeroed at start)
* clean up genplot handling of stacks
*
* Revision 1.135 1996/06/17 03:20:32 jimz
* move out raidframe_attr_default
* don't monkey with stack sizes
*
* Revision 1.134 1996/06/14 23:15:38 jimz
* attempt to deal with thread GC problem
*
* Revision 1.133 1996/06/14 21:24:08 jimz
* new ConfigureEtimer init
* moved out timer vars
*
* Revision 1.132 1996/06/14 16:19:03 jimz
* remove include of pdllib.h (beginning of PDL cleanup)
*
* Revision 1.131 1996/06/14 14:35:24 jimz
* clean up dfstrace protection
*
* Revision 1.130 1996/06/14 14:16:09 jimz
* engine config is now array-specific
*
* Revision 1.129 1996/06/13 19:08:10 jimz
* add debug var to force keep_acc_totals on
*
* Revision 1.128 1996/06/11 10:57:08 jimz
* init recon_done_proc_mutex
*
* Revision 1.127 1996/06/10 14:18:58 jimz
* move user, throughput stats into per-array structure
*
* Revision 1.126 1996/06/10 11:55:47 jimz
* Straightened out some per-array/not-per-array distinctions, fixed
* a couple bugs related to confusion. Added shutdown lists. Removed
* layout shutdown function (now subsumed by shutdown lists).
*
* Revision 1.125 1996/06/09 02:36:46 jimz
* lots of little crufty cleanup- fixup whitespace
* issues, comment #ifdefs, improve typing in some
* places (esp size-related)
*
* Revision 1.124 1996/06/07 21:33:04 jimz
* begin using consistent types for sector numbers,
* stripe numbers, row+col numbers, recon unit numbers
*
* Revision 1.123 1996/06/05 19:38:32 jimz
* fixed up disk queueing types config
* added sstf disk queueing
* fixed exit bug on diskthreads (ref-ing bad mem)
*
* Revision 1.122 1996/06/05 18:06:02 jimz
* Major code cleanup. The Great Renaming is now done.
* Better modularity. Better typing. Fixed a bunch of
* synchronization bugs. Made a lot of global stuff
* per-desc or per-array. Removed dead code.
*
* Revision 1.121 1996/06/03 23:28:26 jimz
* more bugfixes
* check in tree to sync for IPDS runs with current bugfixes
* there still may be a problem with threads in the script test
* getting I/Os stuck- not trivially reproducible (runs ~50 times
* in a row without getting stuck)
*
* Revision 1.120 1996/06/02 17:31:48 jimz
* Moved a lot of global stuff into array structure, where it belongs.
* Fixed up paritylogging, pss modules in this manner. Some general
* code cleanup. Removed lots of dead code, some dead files.
*
* Revision 1.119 1996/05/31 22:26:54 jimz
* fix a lot of mapping problems, memory allocation problems
* found some weird lock issues, fixed 'em
* more code cleanup
*
* Revision 1.118 1996/05/30 23:22:16 jimz
* bugfixes of serialization, timing problems
* more cleanup
*
* Revision 1.117 1996/05/30 16:28:33 jimz
* typo in rf_SignalQuiescenceLock() fixed
*
* Revision 1.116 1996/05/30 12:59:18 jimz
* make etimer happier, more portable
*
* Revision 1.115 1996/05/30 11:29:41 jimz
* Numerous bug fixes. Stripe lock release code disagreed with the taking code
* about when stripes should be locked (I made it consistent: no parity, no lock)
* There was a lot of extra serialization of I/Os which I've removed- a lot of
* it was to calculate values for the cache code, which is no longer with us.
* More types, function, macro cleanup. Added code to properly quiesce the array
* on shutdown. Made a lot of stuff array-specific which was (bogusly) general
* before. Fixed memory allocation, freeing bugs.
*
* Revision 1.114 1996/05/27 18:56:37 jimz
* more code cleanup
* better typing
* compiles in all 3 environments
*
* Revision 1.113 1996/05/24 22:17:04 jimz
* continue code + namespace cleanup
* typed a bunch of flags
*
* Revision 1.112 1996/05/24 04:28:55 jimz
* release cleanup ckpt
*
* Revision 1.111 1996/05/24 01:59:45 jimz
* another checkpoint in code cleanup for release
* time to sync kernel tree
*
* Revision 1.110 1996/05/23 21:46:35 jimz
* checkpoint in code cleanup (release prep)
* lots of types, function names have been fixed
*
* Revision 1.109 1996/05/23 00:39:56 jimz
* demoMode -> rf_demoMode
*
* Revision 1.108 1996/05/23 00:33:23 jimz
* code cleanup: move all debug decls to rf_options.c, all extern
* debug decls to rf_options.h, all debug vars preceded by rf_
*
* Revision 1.107 1996/05/21 14:30:04 jimz
* idler_desc_mutex should be ifndef SIMULATE
*
* Revision 1.106 1996/05/20 19:31:12 jimz
* add atomic debug (mutex and cond leak finder) stuff
*
* Revision 1.105 1996/05/20 16:12:45 jimz
* switch to rf_{mutex,cond}_{init,destroy}
*
* Revision 1.104 1996/05/18 20:09:41 jimz
* bit of cleanup to compile cleanly in kernel, once again
*
* Revision 1.103 1996/05/18 19:51:34 jimz
* major code cleanup- fix syntax, make some types consistent,
* add prototypes, clean out dead code, et cetera
*
* Revision 1.102 1996/05/16 21:20:51 jimz
* use FREELIST stuff to manage access descriptors
*
* Revision 1.101 1996/05/16 14:21:10 jimz
* remove bogus copies from write path on user
*
* Revision 1.100 1996/05/15 22:33:54 jimz
* appropriately #ifdef cache stuff
*
* Revision 1.99 1996/05/08 21:34:41 jimz
* #if 0 ShutdownCache() and ConfigureCache()
*
* Revision 1.98 1996/05/08 21:01:24 jimz
* fixed up enum type names that were conflicting with other
* enums and function names (ie, "panic")
* future naming trends will be towards RF_ and rf_ for
* everything raidframe-related
*
* Revision 1.97 1996/05/07 19:02:58 wvcii
* corrected header comment of rf_DoAccess()
* reordered free of desc in FreeRaidAccDesc() The desc is now
* freed last.
*
* Revision 1.96 1996/05/07 17:40:50 jimz
* add doDebug
*
* Revision 1.95 1996/05/06 21:35:23 jimz
* fixed ordering of cleanup and removed extra decrement of configureCount
*
* Revision 1.94 1996/05/06 18:44:14 jimz
* reorder cleanup to not blow alloclist out from under various modules
* zero raidPtr contents on config
*
* Revision 1.93 1996/05/04 17:06:53 jimz
* Fail the I/O with ENOSPC if reading past end of the array in the kernel.
*
* Revision 1.92 1996/05/03 19:44:22 wvcii
* debug vars degDagDebug and enableAtomicRMW now defined
* in this file.
*
* Revision 1.91 1995/12/12 18:10:06 jimz
* MIN -> RF_MIN, MAX -> RF_MAX, ASSERT -> RF_ASSERT
* fix 80-column brain damage in comments
*
* Revision 1.90 1995/12/08 15:07:03 arw
* cache code cleanup
*
* Revision 1.89 1995/12/06 20:53:58 wvcii
* created debug var forceParityLogReint
* this variable forces reintegration of all parity logs at shutdown
*
* Revision 1.88 1995/12/01 15:59:10 root
* added copyright info
*
* Revision 1.87 1995/11/28 21:34:02 amiri
* modified SetReconfiguredMode so that it installs the
* spare table only if arch is declustered based on block designs
*
* Revision 1.86 1995/11/21 23:06:11 amiri
* added division by zero check in printing
* throughput stats.
*
* Revision 1.85 1995/11/19 16:27:25 wvcii
* disableParityVerify now defined locally, only read from config
* file for !KERNEL compiles
*
* Revision 1.84 1995/11/17 15:08:31 wvcii
* added debug var disableParityVerify
* used in RealLoopTest to disable parity verification
*
* Revision 1.83 1995/11/07 15:48:43 wvcii
* deleted debug vars: suppressAtomicRMW, enableRollAway, concatDagDebug
* deleted debug vars: debugSelectUnit, debugSelectBlock
* added debug var: enableAtomicRMW
*
* Revision 1.82 1995/10/18 19:28:45 amiri
* added support for reconstruction demos in the
* simulator, by updating some simulator
* variables in Faildisk.
*
* Revision 1.81 1995/10/09 18:36:33 jimz
* move rf_StopThroughputStats() into FreeAccDesc()
* changed throughput output print format
* added user-level copy to write path to emulate kernel hack
*
* Revision 1.80 1995/10/09 18:07:47 wvcii
* moved call to rf_StopThroughputStats to rf_states.c
*
* Revision 1.79 1995/10/09 17:38:53 jimz
* quiesce an array for user-level testing before shutting it down
* (should this also be done in the kernel?)
*
* Revision 1.78 1995/10/09 15:35:43 wvcii
* added code to measure throughput in user mode
*
* Revision 1.77 1995/10/05 06:18:59 jimz
* Changed DDEventRequest() to take additional arg, used by simulator
* to cache diskid so queue length can be decremented on io complete
* (this is a hack to get around the fact that the event mechanism
* assumes it can dereference arbitrary handles on enqueued events)
*
* Revision 1.76 1995/10/04 07:25:10 jimz
* turn off bigstacks by default
*
* Revision 1.75 1995/10/04 07:24:34 jimz
* code for bigstacks in user process
*
* Revision 1.74 1995/09/26 21:42:51 wvcii
* removed calls to ConfigureCache, ShutdownCache when building kernel
* kernel currently does not support any cached architectures
*
* Revision 1.73 1995/09/20 21:05:35 jimz
* add missing unit arg to IO_BUF_ERR() in non-kernel case
*
* Revision 1.72 1995/09/19 23:02:44 jimz
* call RF_DKU_END_IO in the appropriate places
*
* Revision 1.71 1995/09/07 19:02:31 jimz
* mods to get raidframe to compile and link
* in kernel environment
*
* Revision 1.70 1995/09/06 19:24:01 wvcii
* added debug vars enableRollAway and debugRecovery
*
* Revision 1.69 1995/08/24 19:25:36 rachad
* Fixes to LSS GC in the simulater
*
* Revision 1.68 1995/07/28 21:43:42 robby
* checkin after leaving for Rice. Bye
*
* Revision 1.67 1995/07/26 18:06:52 cfb
* *** empty log message ***
*
* Revision 1.66 1995/07/26 03:25:24 robby
* fixed accesses mutex and updated call to ConfigureCache
*
* Revision 1.65 1995/07/25 14:36:52 rachad
* *** empty log message ***
*
* Revision 1.64 1995/07/21 19:29:05 robby
* added total_accesses
*
* Revision 1.63 1995/07/20 19:43:35 cfb
* *** empty log message ***
*
* Revision 1.62 1995/07/20 16:10:24 rachad
* *** empty log message ***
*
* Revision 1.61 1995/07/20 03:36:53 rachad
* Added suport for cache warming
*
* Revision 1.60 1995/07/17 22:31:31 cfb
* *** empty log message ***
*
* Revision 1.59 1995/07/16 17:02:23 cfb
* *** empty log message ***
*
* Revision 1.58 1995/07/16 15:19:27 cfb
* *** empty log message ***
*
* Revision 1.57 1995/07/16 03:17:01 cfb
* *** empty log message ***
*
* Revision 1.56 1995/07/13 16:11:59 cfb
* *** empty log message ***
*
* Revision 1.55 1995/07/13 15:42:40 cfb
* added cacheDebug variable ...
*
* Revision 1.54 1995/07/13 14:28:27 rachad
* *** empty log message ***
*
* Revision 1.53 1995/07/10 21:48:52 robby
* added virtualStripingWarnings
*
* Revision 1.52 1995/07/10 20:41:13 rachad
* *** empty log message ***
*
* Revision 1.51 1995/07/09 19:46:49 cfb
* Added cache Shutdown
*
* Revision 1.50 1995/07/08 21:38:53 rachad
* Added support for interactive traces
* in the simulator
*
* Revision 1.49 1995/07/08 18:05:39 rachad
* Linked up Claudsons code with the real cache
*
* Revision 1.48 1995/07/07 16:00:22 cfb
* Added initialization of cacheDesc to AllocRaidAccDesc
*
* Revision 1.47 1995/07/06 14:22:37 rachad
* Merge complete
*
* Revision 1.46.50.2 1995/06/21 17:48:30 robby
* test
*
* Revision 1.46.50.1 1995/06/21 17:34:49 robby
* branching to work on "meta-dag" capabilities
*
* Revision 1.46.10.5 1995/07/03 21:58:34 holland
* added support for suppressing both stripe locks & large writes
*
* Revision 1.46.10.4 1995/06/27 03:42:48 holland
* typo fix
*
* Revision 1.46.10.3 1995/06/27 03:31:42 holland
* prototypes
*
* Revision 1.46.10.2 1995/06/27 03:17:57 holland
* fixed callback bug in kernel rf_DoAccess
*
* Revision 1.46.10.1 1995/06/25 14:32:44 holland
* initial checkin on new branch
*
* Revision 1.46 1995/06/13 17:52:41 holland
* added UserStats stuff
*
* Revision 1.45 1995/06/13 16:03:41 rachad
* *** empty log message ***
*
* Revision 1.44 1995/06/12 15:54:40 rachad
* Added garbege collection for log structured storage
*
* Revision 1.43 1995/06/09 18:01:09 holland
* various changes related to in-kernel recon, multiple-row arrays,
* trace extraction from kernel, etc.
*
* Revision 1.42 1995/06/08 19:52:28 rachad
* *** empty log message ***
*
* Revision 1.41 1995/06/08 00:11:49 robby
* added a debug variable -- showVirtualSizeRequirements
*
* Revision 1.40 1995/06/05 00:33:30 holland
* protectedSectors bug fix
*
* Revision 1.39 1995/06/01 22:45:03 holland
* made compilation of parity logging and virtual striping
* stuff conditional on some constants defined in rf_archs.h
*
* Revision 1.38 1995/06/01 21:52:37 holland
* replaced NULL sizes in calls to Free() by -1, and caused this
* to suppress the size-mismatch error
*
* Revision 1.37 1995/05/26 20:04:54 wvcii
* modified parity logging debug vars
*
* Revision 1.36 95/05/21 15:32:41 wvcii
* added debug vars: parityLogDebug, numParityRegions, numParityLogs,
* numReintegrationThreads
*
* Revision 1.35 95/05/19 20:58:21 holland
* cleanups on error cases in rf_DoAccess
*
* Revision 1.34 1995/05/16 17:35:53 holland
* added rf_copyback_in_progress. this is debug-only.
*
* Revision 1.33 1995/05/15 12:25:35 holland
* bug fix in test code: no stripe locks were getting acquired in RAID0 mode
*
* Revision 1.32 1995/05/10 18:54:12 holland
* bug fixes related to deadlock problem at time of disk failure
* eliminated read-op-write code
* beefed up parity checking in loop test
* various small changes & new ASSERTs
*
* Revision 1.31 1995/05/02 22:49:02 holland
* add shutdown calls for each architecture
*
* Revision 1.30 1995/05/01 14:43:37 holland
* merged changes from Bill
*
* Revision 1.29 1995/05/01 13:28:00 holland
* parity range locks, locking disk requests, recon+parityscan in kernel, etc.
*
* Revision 1.28 1995/04/24 13:25:51 holland
* rewrite to move disk queues, recon, & atomic RMW to kernel
*
* Revision 1.27 1995/04/06 14:47:56 rachad
* merge completed
*
* Revision 1.26 1995/04/03 20:32:35 rachad
* added reconstruction to simulator
*
* Revision 1.25.10.2 1995/04/03 20:41:00 holland
* misc changes related to distributed sparing
*
* Revision 1.25.10.1 1995/03/17 20:04:01 holland
* initial checkin on new branch
*
* Revision 1.25 1995/03/15 20:34:30 holland
* changes for distributed sparing.
*
* Revision 1.24 1995/03/09 19:53:05 rachad
* *** empty log message ***
*
* Revision 1.23 1995/03/03 18:36:16 rachad
* Simulator mechanism added
*
* Revision 1.22 1995/03/01 20:25:48 holland
* kernelization changes
*
* Revision 1.21 1995/02/17 19:39:56 holland
* added size param to all calls to Free().
* this is ignored at user level, but necessary in the kernel.
*
* Revision 1.20 1995/02/17 13:37:49 holland
* kernelization changes -- not yet complete
*
* Revision 1.19 1995/02/10 18:08:07 holland
* fixed a few things I broke during kernelization
*
* Revision 1.18 1995/02/10 17:34:10 holland
* kernelization changes
*
* Revision 1.17 1995/02/04 15:51:35 holland
* kernelization changes
*
* Revision 1.16 1995/02/03 22:31:36 holland
* many changes related to kernelization
*
* Revision 1.15 1995/02/01 15:13:05 holland
* moved #include of general.h out of raid.h and into each file
*
* Revision 1.14 1995/02/01 14:25:19 holland
* began changes for kernelization:
* changed all instances of mutex_t and cond_t to DECLARE macros
* converted configuration code to use config structure
*
* Revision 1.13 1995/01/30 14:53:46 holland
* extensive changes related to making DoIO non-blocking
*
* Revision 1.12 1995/01/25 00:26:21 holland
* eliminated support for aio
*
* Revision 1.11 1995/01/24 23:58:46 holland
* multi-way recon XOR, plus various small changes
*
* Revision 1.10 1995/01/11 19:27:02 holland
* various changes related to performance tuning
*
* Revision 1.9 1994/12/05 15:29:09 holland
* added trace run time limitation (maxTraceRunTimeSec)
*
* Revision 1.8 1994/12/05 04:18:12 holland
* various new control vars in the config file
*
* Revision 1.7 1994/11/29 23:11:36 holland
* tracerec bug on dag retry fixed
*
* Revision 1.6 1994/11/29 22:11:38 danner
* holland updates
*
* Revision 1.5 1994/11/29 21:09:47 danner
* Detailed tracing support (holland).
*
* Revision 1.4 1994/11/29 20:36:02 danner
* Added suppressAtomicRMW option.
*
* Revision 1.3 1994/11/21 15:34:06 danner
* Added ConfigureAllocList() call.
*
*/
#ifdef _KERNEL
#define KERNEL
#endif
#if defined(__NetBSD__) && defined(_KERNEL)
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ioctl.h>
#include <sys/fcntl.h>
#include <sys/vnode.h>
#endif
#ifdef KERNEL
#ifndef __NetBSD__
#include <dkusage.h>
#include <dfstrace.h>
#endif /* !__NetBSD__ */
#endif /* KERNEL */
#include "rf_archs.h"
#include "rf_threadstuff.h"
#ifndef KERNEL
#include <stdio.h>
#include <stdlib.h>
#endif /* KERNEL */
#include <sys/errno.h>
#include "rf_raid.h"
#include "rf_dag.h"
#include "rf_aselect.h"
#include "rf_diskqueue.h"
#include "rf_parityscan.h"
#include "rf_alloclist.h"
#include "rf_threadid.h"
#include "rf_dagutils.h"
#include "rf_utils.h"
#include "rf_etimer.h"
#include "rf_acctrace.h"
#include "rf_configure.h"
#include "rf_general.h"
#include "rf_desc.h"
#include "rf_states.h"
#include "rf_freelist.h"
#include "rf_decluster.h"
#include "rf_map.h"
#include "rf_diskthreads.h"
#include "rf_revent.h"
#include "rf_callback.h"
#include "rf_engine.h"
#include "rf_memchunk.h"
#include "rf_mcpair.h"
#include "rf_nwayxor.h"
#include "rf_debugprint.h"
#include "rf_copyback.h"
#if !defined(__NetBSD__)
#include "rf_camlayer.h"
#endif
#include "rf_driver.h"
#include "rf_options.h"
#include "rf_shutdown.h"
#include "rf_sys.h"
#include "rf_cpuutil.h"
#ifdef SIMULATE
#include "rf_diskevent.h"
#endif /* SIMULATE */
#ifdef KERNEL
#include <sys/buf.h>
#ifndef __NetBSD__
#include <io/common/devdriver.h>
#endif /* !__NetBSD__ */
#if DFSTRACE > 0
#include <sys/dfs_log.h>
#include <sys/dfstracebuf.h>
#endif /* DFSTRACE > 0 */
#if DKUSAGE > 0
#include <sys/dkusage.h>
#include <io/common/iotypes.h>
#include <io/cam/dec_cam.h>
#include <io/cam/cam.h>
#include <io/cam/pdrv.h>
#endif /* DKUSAGE > 0 */
#endif /* KERNEL */
#if RF_DEMO > 0
#include "rf_demo.h"
#endif /* RF_DEMO > 0 */
/* rad == RF_RaidAccessDesc_t */
static RF_FreeList_t *rf_rad_freelist;
#define RF_MAX_FREE_RAD 128
#define RF_RAD_INC 16
#define RF_RAD_INITIAL 32
/* debug variables */
char rf_panicbuf[2048]; /* a buffer to hold an error msg when we panic */
/* main configuration routines */
static int raidframe_booted = 0;
static void rf_ConfigureDebug(RF_Config_t *cfgPtr);
static void set_debug_option(char *name, long val);
static void rf_UnconfigureArray(void);
static int init_rad(RF_RaidAccessDesc_t *);
static void clean_rad(RF_RaidAccessDesc_t *);
static void rf_ShutdownRDFreeList(void *);
static int rf_ConfigureRDFreeList(RF_ShutdownList_t **);
RF_DECLARE_MUTEX(rf_printf_mutex) /* debug only: avoids interleaved printfs by different stripes */
RF_DECLARE_GLOBAL_THREADID /* declarations for threadid.h */
#if !defined(KERNEL) && !defined(SIMULATE)
static int rf_InitThroughputStats(RF_ShutdownList_t **listp, RF_Raid_t *raidPtr, RF_Config_t *cfgPtr);
static void rf_StopThroughputStats(RF_Raid_t *raidPtr);
static void rf_PrintThroughputStats(RF_Raid_t *raidPtr);
#endif /* !KERNEL && !SIMULATE */
#ifdef KERNEL
#define SIGNAL_QUIESCENT_COND(_raid_) wakeup(&((_raid_)->accesses_suspended))
#ifndef __NetBSD__
#define WAIT_FOR_QUIESCENCE(_raid_) \
mpsleep(&((_raid_)->accesses_suspended), PZERO, "raidframe quiesce", 0, \
(void *) simple_lock_addr((_raid_)->access_suspend_mutex), MS_LOCK_SIMPLE)
#else
#define WAIT_FOR_QUIESCENCE(_raid_) \
tsleep(&((_raid_)->accesses_suspended),PRIBIO|PCATCH,"raidframe quiesce", 0);
#endif
#if DKUSAGE > 0
#define IO_BUF_ERR(bp, err, unit) { \
bp->b_flags |= B_ERROR; \
bp->b_resid = bp->b_bcount; \
bp->b_error = err; \
RF_DKU_END_IO(unit, bp); \
biodone(bp); \
}
#else
#define IO_BUF_ERR(bp, err, unit) { \
bp->b_flags |= B_ERROR; \
bp->b_resid = bp->b_bcount; \
bp->b_error = err; \
RF_DKU_END_IO(unit); \
biodone(bp); \
}
#endif /* DKUSAGE > 0 */
#else /* KERNEL */
#define SIGNAL_QUIESCENT_COND(_raid_) RF_SIGNAL_COND((_raid_)->quiescent_cond)
#define WAIT_FOR_QUIESCENCE(_raid_) RF_WAIT_COND((_raid_)->quiescent_cond, (_raid_)->access_suspend_mutex)
#define IO_BUF_ERR(bp, err, unit)
#endif /* KERNEL */
static int configureCount=0; /* number of active configurations */
static int isconfigged=0; /* is basic raidframe (non per-array) stuff configged */
RF_DECLARE_STATIC_MUTEX(configureMutex) /* used to lock the configuration stuff */
static RF_ShutdownList_t *globalShutdown; /* non array-specific stuff */
static int rf_ConfigureRDFreeList(RF_ShutdownList_t **listp);
/* called at system boot time */
int rf_BootRaidframe()
{
#if 0
long stacksize;
#endif
int rc;
if (raidframe_booted)
return(EBUSY);
raidframe_booted = 1;
#if RF_DEBUG_ATOMIC > 0
rf_atent_init();
#endif /* RF_DEBUG_ATOMIC > 0 */
rf_setup_threadid();
rf_assign_threadid();
#if !defined(KERNEL) && !defined(SIMULATE)
if (RF_THREAD_ATTR_CREATE(raidframe_attr_default)) {
fprintf(stderr, "Unable to create default thread attr\n");
exit(1);
}
#if 0
stacksize = RF_THREAD_ATTR_GETSTACKSIZE(raidframe_attr_default);
if (stacksize < 0) {
fprintf(stderr, "Unable to get stack size of default thread attr\n");
exit(1);
}
stacksize += 16384;
rc = RF_THREAD_ATTR_SETSTACKSIZE(raidframe_attr_default, stacksize);
if (rc) {
fprintf(stderr, "Unable to set stack size of default thread attr\n");
exit(1);
}
#endif /* 0 */
#endif /* !KERNEL && !SIMULATE */
rc = rf_mutex_init(&configureMutex);
if (rc) {
RF_ERRORMSG3("Unable to init mutex file %s line %d rc=%d\n", __FILE__,
__LINE__, rc);
RF_PANIC();
}
configureCount = 0;
isconfigged = 0;
globalShutdown = NULL;
return(0);
}
/*
* This function is really just for debugging user-level stuff: it
* frees up all memory, other RAIDframe resources which might otherwise
* be kept around. This is used with systems like "sentinel" to detect
* memory leaks.
*/
int rf_UnbootRaidframe()
{
int rc;
RF_LOCK_MUTEX(configureMutex);
if (configureCount) {
RF_UNLOCK_MUTEX(configureMutex);
return(EBUSY);
}
raidframe_booted = 0;
RF_UNLOCK_MUTEX(configureMutex);
rc = rf_mutex_destroy(&configureMutex);
if (rc) {
RF_ERRORMSG3("Unable to destroy mutex file %s line %d rc=%d\n", __FILE__,
__LINE__, rc);
RF_PANIC();
}
#if RF_DEBUG_ATOMIC > 0
rf_atent_shutdown();
#endif /* RF_DEBUG_ATOMIC > 0 */
return(0);
}
/*
* Called whenever an array is shutdown
*/
static void rf_UnconfigureArray()
{
int rc;
RF_LOCK_MUTEX(configureMutex);
if (--configureCount == 0) { /* if no active configurations, shut everything down */
isconfigged = 0;
rc = rf_ShutdownList(&globalShutdown);
if (rc) {
RF_ERRORMSG1("RAIDFRAME: unable to do global shutdown, rc=%d\n", rc);
}
rf_shutdown_threadid();
/*
* We must wait until now, because the AllocList module
* uses the DebugMem module.
*/
if (rf_memDebug)
rf_print_unfreed();
}
RF_UNLOCK_MUTEX(configureMutex);
}
/*
* Called to shut down an array.
*/
int rf_Shutdown(raidPtr)
RF_Raid_t *raidPtr;
{
#if !defined(__NetBSD) && !defined(_KERNEL)
int rc;
#endif
int r,c;
#if defined(__NetBSD__) && defined(_KERNEL)
struct proc *p;
#endif
if (!raidPtr->valid) {
RF_ERRORMSG("Attempt to shut down unconfigured RAIDframe driver. Aborting shutdown\n");
return(EINVAL);
}
/*
* wait for outstanding IOs to land
* As described in rf_raid.h, we use the rad_freelist lock
* to protect the per-array info about outstanding descs
* since we need to do freelist locking anyway, and this
* cuts down on the amount of serialization we've got going
* on.
*/
RF_FREELIST_DO_LOCK(rf_rad_freelist);
if (raidPtr->waitShutdown) {
RF_FREELIST_DO_UNLOCK(rf_rad_freelist);
return(EBUSY);
}
raidPtr->waitShutdown = 1;
while (raidPtr->nAccOutstanding) {
RF_WAIT_COND(raidPtr->outstandingCond, RF_FREELIST_MUTEX_OF(rf_rad_freelist));
}
RF_FREELIST_DO_UNLOCK(rf_rad_freelist);
#if !defined(KERNEL) && !defined(SIMULATE)
rf_PrintThroughputStats(raidPtr);
#endif /* !KERNEL && !SIMULATE */
raidPtr->valid = 0;
#if !defined(KERNEL) && !defined(SIMULATE)
rf_TerminateDiskQueues(raidPtr); /* tell all disk queues to release any waiting threads */
rf_ShutdownDiskThreads(raidPtr); /* wait for all threads to exit */
#endif /* !KERNEL && !SIMULATE */
#if defined(__NetBSD__) && defined(_KERNEL)
/* We take this opportunity to close the vnodes like we should.. */
p = raidPtr->proc; /* XXX */
for(r=0;r<raidPtr->numRow;r++) {
for(c=0;c<raidPtr->numCol;c++) {
printf("Closing vnode for row: %d col: %d\n",r,c);
if (raidPtr->raid_cinfo[r][c].ci_vp) {
(void)vn_close(raidPtr->raid_cinfo[r][c].ci_vp,
FREAD|FWRITE, p->p_ucred, p);
} else {
printf("vnode was NULL\n");
}
}
}
for(r=0;r<raidPtr->numSpare;r++) {
printf("Closing vnode for spare: %d\n",r);
if (raidPtr->raid_cinfo[0][raidPtr->numCol+r].ci_vp) {
(void)vn_close(raidPtr->raid_cinfo[0][raidPtr->numCol+r].ci_vp,
FREAD|FWRITE, p->p_ucred, p);
} else {
printf("vnode was NULL\n");
}
}
#endif
rf_ShutdownList(&raidPtr->shutdownList);
rf_UnconfigureArray();
return(0);
}
#define DO_INIT_CONFIGURE(f) { \
rc = f (&globalShutdown); \
if (rc) { \
RF_ERRORMSG2("RAIDFRAME: failed %s with %d\n", RF_STRING(f), rc); \
rf_ShutdownList(&globalShutdown); \
configureCount--; \
RF_UNLOCK_MUTEX(configureMutex); \
return(rc); \
} \
}
#define DO_RAID_FAIL() { \
rf_ShutdownList(&raidPtr->shutdownList); \
rf_UnconfigureArray(); \
}
#define DO_RAID_INIT_CONFIGURE(f) { \
rc = f (&raidPtr->shutdownList, raidPtr, cfgPtr); \
if (rc) { \
RF_ERRORMSG2("RAIDFRAME: failed %s with %d\n", RF_STRING(f), rc); \
DO_RAID_FAIL(); \
return(rc); \
} \
}
#define DO_RAID_MUTEX(_m_) { \
rc = rf_create_managed_mutex(&raidPtr->shutdownList, (_m_)); \
if (rc) { \
RF_ERRORMSG3("Unable to init mutex file %s line %d rc=%d\n", \
__FILE__, __LINE__, rc); \
DO_RAID_FAIL(); \
return(rc); \
} \
}
#define DO_RAID_COND(_c_) { \
rc = rf_create_managed_cond(&raidPtr->shutdownList, (_c_)); \
if (rc) { \
RF_ERRORMSG3("Unable to init cond file %s line %d rc=%d\n", \
__FILE__, __LINE__, rc); \
DO_RAID_FAIL(); \
return(rc); \
} \
}
int rf_Configure(raidPtr, cfgPtr)
RF_Raid_t *raidPtr;
RF_Config_t *cfgPtr;
{
RF_RowCol_t row, col;
int i, rc;
int unit;
struct proc *p;
if (raidPtr->valid) {
RF_ERRORMSG("RAIDframe configuration not shut down. Aborting configure.\n");
return(EINVAL);
}
RF_LOCK_MUTEX(configureMutex);
configureCount++;
if (isconfigged == 0) {
rc = rf_create_managed_mutex(&globalShutdown, &rf_printf_mutex);
if (rc) {
RF_ERRORMSG3("Unable to init mutex file %s line %d rc=%d\n", __FILE__,
__LINE__, rc);
rf_ShutdownList(&globalShutdown);
return(rc);
}
/* initialize globals */
printf("RAIDFRAME: protectedSectors is %ld\n",rf_protectedSectors);
rf_clear_debug_print_buffer();
DO_INIT_CONFIGURE(rf_ConfigureAllocList);
DO_INIT_CONFIGURE(rf_ConfigureEtimer);
/*
* Yes, this does make debugging general to the whole system instead
* of being array specific. Bummer, drag.
*/
rf_ConfigureDebug(cfgPtr);
DO_INIT_CONFIGURE(rf_ConfigureDebugMem);
#ifdef SIMULATE
rf_default_disk_names();
DO_INIT_CONFIGURE(rf_DDEventInit);
#endif /* SIMULATE */
DO_INIT_CONFIGURE(rf_ConfigureAccessTrace);
DO_INIT_CONFIGURE(rf_ConfigureMapModule);
DO_INIT_CONFIGURE(rf_ConfigureReconEvent);
DO_INIT_CONFIGURE(rf_ConfigureCallback);
DO_INIT_CONFIGURE(rf_ConfigureMemChunk);
DO_INIT_CONFIGURE(rf_ConfigureRDFreeList);
DO_INIT_CONFIGURE(rf_ConfigureNWayXor);
DO_INIT_CONFIGURE(rf_ConfigureStripeLockFreeList);
DO_INIT_CONFIGURE(rf_ConfigureMCPair);
#ifndef SIMULATE
#if !defined(__NetBSD__)
DO_INIT_CONFIGURE(rf_ConfigureCamLayer);
#endif
#endif /* !SIMULATE */
DO_INIT_CONFIGURE(rf_ConfigureDAGs);
DO_INIT_CONFIGURE(rf_ConfigureDAGFuncs);
DO_INIT_CONFIGURE(rf_ConfigureDebugPrint);
DO_INIT_CONFIGURE(rf_ConfigureReconstruction);
DO_INIT_CONFIGURE(rf_ConfigureCopyback);
DO_INIT_CONFIGURE(rf_ConfigureDiskQueueSystem);
DO_INIT_CONFIGURE(rf_ConfigureCpuMonitor);
isconfigged = 1;
}
RF_UNLOCK_MUTEX(configureMutex);
/*
* Null out the entire raid descriptor to avoid problems when we reconfig.
* This also clears the valid bit.
*/
/* XXX this clearing should be moved UP to outside of here.... that, or
rf_Configure() needs to take more arguments... XXX */
#if defined(__NetBSD__) && defined(_KERNEL)
unit = raidPtr->raidid;
p = raidPtr->proc; /* XXX save these... */
#endif
bzero((char *)raidPtr, sizeof(RF_Raid_t));
#if defined(__NetBSD__) && defined(_KERNEL)
raidPtr->raidid = unit;
raidPtr->proc = p; /* XXX and then recover them..*/
#endif
DO_RAID_MUTEX(&raidPtr->mutex);
/* set up the cleanup list. Do this after ConfigureDebug so that value of memDebug will be set */
rf_MakeAllocList(raidPtr->cleanupList);
if (raidPtr->cleanupList == NULL) {
DO_RAID_FAIL();
return(ENOMEM);
}
rc = rf_ShutdownCreate(&raidPtr->shutdownList,
(void (*)(void *))rf_FreeAllocList,
raidPtr->cleanupList);
if (rc) {
RF_ERRORMSG3("Unable to add to shutdown list file %s line %d rc=%d\n",
__FILE__, __LINE__, rc);
DO_RAID_FAIL();
return(rc);
}
raidPtr->numRow = cfgPtr->numRow;
raidPtr->numCol = cfgPtr->numCol;
raidPtr->numSpare = cfgPtr->numSpare;
#if defined(__NetBSD__) && defined(_KERNEL)
/* XXX we don't even pretend to support more than one row
in the kernel... */
if (raidPtr->numRow != 1) {
RF_ERRORMSG("Only one row supported in kernel.\n");
DO_RAID_FAIL();
return(EINVAL);
}
#endif
RF_CallocAndAdd(raidPtr->status, raidPtr->numRow, sizeof(RF_RowStatus_t),
(RF_RowStatus_t *), raidPtr->cleanupList);
if (raidPtr->status == NULL) {
DO_RAID_FAIL();
return(ENOMEM);
}
RF_CallocAndAdd(raidPtr->reconControl, raidPtr->numRow,
sizeof(RF_ReconCtrl_t *), (RF_ReconCtrl_t **), raidPtr->cleanupList);
if (raidPtr->reconControl == NULL) {
DO_RAID_FAIL();
return(ENOMEM);
}
for (i=0; i<raidPtr->numRow; i++) {
raidPtr->status[i] = rf_rs_optimal;
raidPtr->reconControl[i] = NULL;
}
DO_RAID_INIT_CONFIGURE(rf_ConfigureEngine);
#if !defined(KERNEL) && !defined(SIMULATE)
DO_RAID_INIT_CONFIGURE(rf_InitThroughputStats);
#endif /* !KERNEL && !SIMULATE */
DO_RAID_INIT_CONFIGURE(rf_ConfigureStripeLocks);
DO_RAID_COND(&raidPtr->outstandingCond);
raidPtr->nAccOutstanding = 0;
raidPtr->waitShutdown = 0;
DO_RAID_MUTEX(&raidPtr->access_suspend_mutex);
DO_RAID_COND(&raidPtr->quiescent_cond);
DO_RAID_COND(&raidPtr->waitForReconCond);
DO_RAID_MUTEX(&raidPtr->recon_done_proc_mutex);
DO_RAID_INIT_CONFIGURE(rf_ConfigureDisks);
DO_RAID_INIT_CONFIGURE(rf_ConfigureSpareDisks);
/* do this after ConfigureDisks & ConfigureSpareDisks to be sure dev no. is set */
DO_RAID_INIT_CONFIGURE(rf_ConfigureDiskQueues);
#ifndef KERNEL
DO_RAID_INIT_CONFIGURE(rf_ConfigureDiskThreads);
#endif /* !KERNEL */
DO_RAID_INIT_CONFIGURE(rf_ConfigureLayout);
DO_RAID_INIT_CONFIGURE(rf_ConfigurePSStatus);
for(row=0;row<raidPtr->numRow;row++) {
for(col=0;col<raidPtr->numCol;col++) {
/*
* XXX better distribution
*/
raidPtr->hist_diskreq[row][col] = 0;
}
}
if (rf_keepAccTotals) {
raidPtr->keep_acc_totals = 1;
}
rf_StartUserStats(raidPtr);
raidPtr->valid = 1;
return(0);
}
static int init_rad(desc)
RF_RaidAccessDesc_t *desc;
{
int rc;
rc = rf_mutex_init(&desc->mutex);
if (rc) {
RF_ERRORMSG3("Unable to init mutex file %s line %d rc=%d\n", __FILE__,
__LINE__, rc);
return(rc);
}
rc = rf_cond_init(&desc->cond);
if (rc) {
RF_ERRORMSG3("Unable to init cond file %s line %d rc=%d\n", __FILE__,
__LINE__, rc);
rf_mutex_destroy(&desc->mutex);
return(rc);
}
return(0);
}
static void clean_rad(desc)
RF_RaidAccessDesc_t *desc;
{
rf_mutex_destroy(&desc->mutex);
rf_cond_destroy(&desc->cond);
}
static void rf_ShutdownRDFreeList(ignored)
void *ignored;
{
RF_FREELIST_DESTROY_CLEAN(rf_rad_freelist,next,(RF_RaidAccessDesc_t *),clean_rad);
}
static int rf_ConfigureRDFreeList(listp)
RF_ShutdownList_t **listp;
{
int rc;
RF_FREELIST_CREATE(rf_rad_freelist, RF_MAX_FREE_RAD,
RF_RAD_INC, sizeof(RF_RaidAccessDesc_t));
if (rf_rad_freelist == NULL) {
return(ENOMEM);
}
rc = rf_ShutdownCreate(listp, rf_ShutdownRDFreeList, NULL);
if (rc) {
RF_ERRORMSG3("Unable to add to shutdown list file %s line %d rc=%d\n", __FILE__,
__LINE__, rc);
rf_ShutdownRDFreeList(NULL);
return(rc);
}
RF_FREELIST_PRIME_INIT(rf_rad_freelist, RF_RAD_INITIAL,next,
(RF_RaidAccessDesc_t *),init_rad);
return(0);
}
RF_RaidAccessDesc_t *rf_AllocRaidAccDesc(
RF_Raid_t *raidPtr,
RF_IoType_t type,
RF_RaidAddr_t raidAddress,
RF_SectorCount_t numBlocks,
caddr_t bufPtr,
void *bp,
RF_DagHeader_t **paramDAG,
RF_AccessStripeMapHeader_t **paramASM,
RF_RaidAccessFlags_t flags,
void (*cbF)(struct buf *),
void *cbA,
RF_AccessState_t *states)
{
RF_RaidAccessDesc_t *desc;
RF_FREELIST_GET_INIT_NOUNLOCK(rf_rad_freelist,desc,next,(RF_RaidAccessDesc_t *),init_rad);
if (raidPtr->waitShutdown) {
/*
* Actually, we're shutting the array down. Free the desc
* and return NULL.
*/
RF_FREELIST_DO_UNLOCK(rf_rad_freelist);
RF_FREELIST_FREE_CLEAN(rf_rad_freelist,desc,next,clean_rad);
return(NULL);
}
raidPtr->nAccOutstanding++;
RF_FREELIST_DO_UNLOCK(rf_rad_freelist);
desc->raidPtr = (void*)raidPtr;
desc->type = type;
desc->raidAddress = raidAddress;
desc->numBlocks = numBlocks;
desc->bufPtr = bufPtr;
desc->bp = bp;
desc->paramDAG = paramDAG;
desc->paramASM = paramASM;
desc->flags = flags;
desc -> states = states;
desc -> state = 0;
desc->status = 0;
bzero((char *)&desc->tracerec, sizeof(RF_AccTraceEntry_t));
desc->callbackFunc= (void (*)(RF_CBParam_t))cbF; /* XXX */
desc->callbackArg = cbA;
desc->next = NULL;
desc->head = desc;
desc->numPending = 0;
desc->cleanupList = NULL;
rf_MakeAllocList(desc->cleanupList);
rf_get_threadid(desc->tid);
#ifdef SIMULATE
desc->owner = rf_GetCurrentOwner();
#endif /* SIMULATE */
return(desc);
}
void rf_FreeRaidAccDesc(RF_RaidAccessDesc_t *desc)
{
RF_Raid_t *raidPtr = desc->raidPtr;
RF_ASSERT(desc);
#if !defined(KERNEL) && !defined(SIMULATE)
rf_StopThroughputStats(raidPtr);
#endif /* !KERNEL && !SIMULATE */
rf_FreeAllocList(desc->cleanupList);
RF_FREELIST_FREE_CLEAN_NOUNLOCK(rf_rad_freelist,desc,next,clean_rad);
raidPtr->nAccOutstanding--;
if (raidPtr->waitShutdown) {
RF_SIGNAL_COND(raidPtr->outstandingCond);
}
RF_FREELIST_DO_UNLOCK(rf_rad_freelist);
}
#ifdef JIMZ
#define THREAD_NUMDESC 1024
#define THREAD_NUM 600
static RF_RaidAccessDesc_t *dest_hist[THREAD_NUM*THREAD_NUMDESC];
int jimz_access_num[THREAD_NUM];
#endif /* JIMZ */
/*********************************************************************
* Main routine for performing an access.
* Accesses are retried until a DAG can not be selected. This occurs
* when either the DAG library is incomplete or there are too many
* failures in a parity group.
********************************************************************/
int rf_DoAccess(
RF_Raid_t *raidPtr,
RF_IoType_t type,
int async_flag,
RF_RaidAddr_t raidAddress,
RF_SectorCount_t numBlocks,
caddr_t bufPtr,
void *bp_in,
RF_DagHeader_t **paramDAG,
RF_AccessStripeMapHeader_t **paramASM,
RF_RaidAccessFlags_t flags,
RF_RaidAccessDesc_t **paramDesc,
void (*cbF)(struct buf *),
void *cbA)
/*
type should be read or write
async_flag should be RF_TRUE or RF_FALSE
bp_in is a buf pointer. void * to facilitate ignoring it outside the kernel
*/
{
int tid;
RF_RaidAccessDesc_t *desc;
caddr_t lbufPtr = bufPtr;
#ifdef KERNEL
struct buf *bp = (struct buf *) bp_in;
#if DFSTRACE > 0
struct { RF_uint64 raidAddr; int numBlocks; char type;} dfsrecord;
#endif /* DFSTRACE > 0 */
#else /* KERNEL */
void *bp = bp_in;
#endif /* KERNEL */
raidAddress += rf_raidSectorOffset;
if (!raidPtr->valid) {
RF_ERRORMSG("RAIDframe driver not successfully configured. Rejecting access.\n");
IO_BUF_ERR(bp, EINVAL, raidPtr->raidid);
return(EINVAL);
}
#if defined(KERNEL) && DFSTRACE > 0
if (rf_DFSTraceAccesses) {
dfsrecord.raidAddr = raidAddress;
dfsrecord.numBlocks = numBlocks;
dfsrecord.type = type;
dfs_log(DFS_NOTE, (char *) &dfsrecord, sizeof(dfsrecord), 0);
}
#endif /* KERNEL && DFSTRACE > 0 */
rf_get_threadid(tid);
if (rf_accessDebug) {
printf("logBytes is: %d %d %d\n",raidPtr->raidid,
raidPtr->logBytesPerSector,
(int)rf_RaidAddressToByte(raidPtr,numBlocks));
printf("[%d] %s raidAddr %d (stripeid %d-%d) numBlocks %d (%d bytes) buf 0x%lx\n",tid,
(type==RF_IO_TYPE_READ) ? "READ":"WRITE", (int)raidAddress,
(int) rf_RaidAddressToStripeID(&raidPtr->Layout, raidAddress),
(int) rf_RaidAddressToStripeID(&raidPtr->Layout, raidAddress+numBlocks-1),
(int) numBlocks,
(int) rf_RaidAddressToByte(raidPtr,numBlocks),
(long) bufPtr);
}
if (raidAddress + numBlocks > raidPtr->totalSectors) {
printf("DoAccess: raid addr %lu too large to access %lu sectors. Max legal addr is %lu\n",
(u_long)raidAddress,(u_long)numBlocks,(u_long)raidPtr->totalSectors);
#ifdef KERNEL
if (type == RF_IO_TYPE_READ) {
IO_BUF_ERR(bp, ENOSPC, raidPtr->raidid);
return(ENOSPC);
} else {
IO_BUF_ERR(bp, ENOSPC, raidPtr->raidid);
return(ENOSPC);
}
#elif defined(SIMULATE)
RF_PANIC();
#else /* SIMULATE */
return(EIO);
#endif /* SIMULATE */
}
#if !defined(KERNEL) && !defined(SIMULATE)
rf_StartThroughputStats(raidPtr);
#endif /* !KERNEL && !SIMULATE */
desc = rf_AllocRaidAccDesc(raidPtr, type, raidAddress,
numBlocks, lbufPtr, bp, paramDAG, paramASM,
flags, cbF, cbA, raidPtr->Layout.map->states);
if (desc == NULL) {
return(ENOMEM);
}
#ifdef JIMZ
dest_hist[(tid*THREAD_NUMDESC)+jimz_access_num[tid]]; jimz_access_num[tid]++;
#endif /* JIMZ */
RF_ETIMER_START(desc->tracerec.tot_timer);
#ifdef SIMULATE
/* simulator uses paramDesc to continue dag from test function */
desc->async_flag=async_flag;
*paramDesc=desc;
return(0);
#endif /* SIMULATE */
rf_ContinueRaidAccess(desc);
#ifndef KERNEL
if (!(flags & RF_DAG_NONBLOCKING_IO)) {
RF_LOCK_MUTEX(desc->mutex);
while (!(desc->flags & RF_DAG_ACCESS_COMPLETE)) {
RF_WAIT_COND(desc->cond, desc->mutex);
}
RF_UNLOCK_MUTEX(desc->mutex);
rf_FreeRaidAccDesc(desc);
}
#endif /* !KERNEL */
return(0);
}
/* force the array into reconfigured mode without doing reconstruction */
int rf_SetReconfiguredMode(raidPtr, row, col)
RF_Raid_t *raidPtr;
int row;
int col;
{
if (!(raidPtr->Layout.map->flags & RF_DISTRIBUTE_SPARE)) {
printf("Can't set reconfigured mode in dedicated-spare array\n");
RF_PANIC();
}
RF_LOCK_MUTEX(raidPtr->mutex);
raidPtr->numFailures++;
raidPtr->Disks[row][col].status = rf_ds_dist_spared;
raidPtr->status[row] = rf_rs_reconfigured;
/* install spare table only if declustering + distributed sparing architecture. */
if ( raidPtr->Layout.map->flags & RF_BD_DECLUSTERED )
rf_InstallSpareTable(raidPtr, row, col);
RF_UNLOCK_MUTEX(raidPtr->mutex);
return(0);
}
extern int fail_row, fail_col, fail_time;
extern int delayed_recon;
int rf_FailDisk(
RF_Raid_t *raidPtr,
int frow,
int fcol,
int initRecon)
{
int tid;
rf_get_threadid(tid);
printf("[%d] Failing disk r%d c%d\n",tid,frow,fcol);
RF_LOCK_MUTEX(raidPtr->mutex);
raidPtr->numFailures++;
raidPtr->Disks[frow][fcol].status = rf_ds_failed;
raidPtr->status[frow] = rf_rs_degraded;
RF_UNLOCK_MUTEX(raidPtr->mutex);
#ifdef SIMULATE
#if RF_DEMO > 0
if (rf_demoMode) {
rf_demo_update_mode (RF_DEMO_DEGRADED);
fail_col = fcol; fail_row = frow;
fail_time = rf_CurTime(); /* XXX */
if (initRecon)
delayed_recon = RF_TRUE;
}
else {
if (initRecon)
rf_ReconstructFailedDisk(raidPtr, frow, fcol);
}
#else /* RF_DEMO > 0 */
if (initRecon)
rf_ReconstructFailedDisk(raidPtr, frow, fcol);
#endif /* RF_DEMO > 0 */
#else /* SIMULATE */
if (initRecon)
rf_ReconstructFailedDisk(raidPtr, frow, fcol);
#endif /* SIMULATE */
return(0);
}
#ifdef SIMULATE
extern RF_Owner_t recon_owner;
void rf_ScheduleContinueReconstructFailedDisk(reconDesc)
RF_RaidReconDesc_t *reconDesc;
{
rf_DDEventRequest(rf_CurTime(), rf_ContinueReconstructFailedDisk,
(void *) reconDesc, recon_owner, -4, -4, reconDesc->raidPtr, NULL);
}
#endif /* SIMULATE */
/* releases a thread that is waiting for the array to become quiesced.
* access_suspend_mutex should be locked upon calling this
*/
void rf_SignalQuiescenceLock(raidPtr, reconDesc)
RF_Raid_t *raidPtr;
RF_RaidReconDesc_t *reconDesc;
{
int tid;
if (rf_quiesceDebug) {
rf_get_threadid(tid);
printf("[%d] Signalling quiescence lock\n", tid);
}
raidPtr->access_suspend_release = 1;
if (raidPtr->waiting_for_quiescence) {
#ifndef SIMULATE
SIGNAL_QUIESCENT_COND(raidPtr);
#else /* !SIMULATE */
if (reconDesc) {
rf_ScheduleContinueReconstructFailedDisk(reconDesc);
}
#endif /* !SIMULATE */
}
}
/* suspends all new requests to the array. No effect on accesses that are in flight. */
int rf_SuspendNewRequestsAndWait(raidPtr)
RF_Raid_t *raidPtr;
{
if (rf_quiesceDebug)
printf("Suspending new reqs\n");
RF_LOCK_MUTEX(raidPtr->access_suspend_mutex);
raidPtr->accesses_suspended++;
raidPtr->waiting_for_quiescence = (raidPtr->accs_in_flight == 0) ? 0 : 1;
#ifndef SIMULATE
if (raidPtr->waiting_for_quiescence) {
raidPtr->access_suspend_release=0;
while (!raidPtr->access_suspend_release) {
printf("Suspending: Waiting for Quiesence\n");
WAIT_FOR_QUIESCENCE(raidPtr);
raidPtr->waiting_for_quiescence = 0;
}
}
printf("Quiesence reached..\n");
#endif /* !SIMULATE */
RF_UNLOCK_MUTEX(raidPtr->access_suspend_mutex);
return (raidPtr->waiting_for_quiescence);
}
/* wake up everyone waiting for quiescence to be released */
void rf_ResumeNewRequests(raidPtr)
RF_Raid_t *raidPtr;
{
RF_CallbackDesc_t *t, *cb;
if (rf_quiesceDebug)
printf("Resuming new reqs\n");
RF_LOCK_MUTEX(raidPtr->access_suspend_mutex);
raidPtr->accesses_suspended--;
if (raidPtr->accesses_suspended == 0)
cb = raidPtr->quiesce_wait_list;
else
cb = NULL;
raidPtr->quiesce_wait_list = NULL;
RF_UNLOCK_MUTEX(raidPtr->access_suspend_mutex);
while (cb) {
t = cb;
cb = cb->next;
(t->callbackFunc)(t->callbackArg);
rf_FreeCallbackDesc(t);
}
}
/*****************************************************************************************
*
* debug routines
*
****************************************************************************************/
static void set_debug_option(name, val)
char *name;
long val;
{
RF_DebugName_t *p;
for (p = rf_debugNames; p->name; p++) {
if (!strcmp(p->name, name)) {
*(p->ptr) = val;
printf("[Set debug variable %s to %ld]\n",name,val);
return;
}
}
RF_ERRORMSG1("Unknown debug string \"%s\"\n",name);
}
/* would like to use sscanf here, but apparently not available in kernel */
/*ARGSUSED*/
static void rf_ConfigureDebug(cfgPtr)
RF_Config_t *cfgPtr;
{
char *val_p, *name_p, *white_p;
long val;
int i;
rf_ResetDebugOptions();
for (i=0; cfgPtr->debugVars[i][0] && i < RF_MAXDBGV; i++) {
name_p = rf_find_non_white(&cfgPtr->debugVars[i][0]);
white_p = rf_find_white(name_p); /* skip to start of 2nd word */
val_p = rf_find_non_white(white_p);
if (*val_p == '0' && *(val_p+1) == 'x') val = rf_htoi(val_p+2);
else val = rf_atoi(val_p);
*white_p = '\0';
set_debug_option(name_p, val);
}
}
/* performance monitoring stuff */
#define TIMEVAL_TO_US(t) (((long) t.tv_sec) * 1000000L + (long) t.tv_usec)
#if !defined(KERNEL) && !defined(SIMULATE)
/*
* Throughput stats currently only used in user-level RAIDframe
*/
static int rf_InitThroughputStats(
RF_ShutdownList_t **listp,
RF_Raid_t *raidPtr,
RF_Config_t *cfgPtr)
{
int rc;
/* these used by user-level raidframe only */
rc = rf_create_managed_mutex(listp, &raidPtr->throughputstats.mutex);
if (rc) {
RF_ERRORMSG3("Unable to init mutex file %s line %d rc=%d\n", __FILE__,
__LINE__, rc);
return(rc);
}
raidPtr->throughputstats.sum_io_us = 0;
raidPtr->throughputstats.num_ios = 0;
raidPtr->throughputstats.num_out_ios = 0;
return(0);
}
void rf_StartThroughputStats(RF_Raid_t *raidPtr)
{
RF_LOCK_MUTEX(raidPtr->throughputstats.mutex);
raidPtr->throughputstats.num_ios++;
raidPtr->throughputstats.num_out_ios++;
if (raidPtr->throughputstats.num_out_ios == 1)
RF_GETTIME(raidPtr->throughputstats.start);
RF_UNLOCK_MUTEX(raidPtr->throughputstats.mutex);
}
static void rf_StopThroughputStats(RF_Raid_t *raidPtr)
{
struct timeval diff;
RF_LOCK_MUTEX(raidPtr->throughputstats.mutex);
raidPtr->throughputstats.num_out_ios--;
if (raidPtr->throughputstats.num_out_ios == 0) {
RF_GETTIME(raidPtr->throughputstats.stop);
RF_TIMEVAL_DIFF(&raidPtr->throughputstats.start, &raidPtr->throughputstats.stop, &diff);
raidPtr->throughputstats.sum_io_us += TIMEVAL_TO_US(diff);
}
RF_UNLOCK_MUTEX(raidPtr->throughputstats.mutex);
}
static void rf_PrintThroughputStats(RF_Raid_t *raidPtr)
{
RF_ASSERT(raidPtr->throughputstats.num_out_ios == 0);
if ( raidPtr->throughputstats.sum_io_us != 0 ) {
printf("[Througphut: %8.2f IOs/second]\n", raidPtr->throughputstats.num_ios
/ (raidPtr->throughputstats.sum_io_us / 1000000.0));
}
}
#endif /* !KERNEL && !SIMULATE */
void rf_StartUserStats(RF_Raid_t *raidPtr)
{
RF_GETTIME(raidPtr->userstats.start);
raidPtr->userstats.sum_io_us = 0;
raidPtr->userstats.num_ios = 0;
raidPtr->userstats.num_sect_moved = 0;
}
void rf_StopUserStats(RF_Raid_t *raidPtr)
{
RF_GETTIME(raidPtr->userstats.stop);
}
void rf_UpdateUserStats(raidPtr, rt, numsect)
RF_Raid_t *raidPtr;
int rt; /* resp time in us */
int numsect; /* number of sectors for this access */
{
raidPtr->userstats.sum_io_us += rt;
raidPtr->userstats.num_ios++;
raidPtr->userstats.num_sect_moved += numsect;
}
void rf_PrintUserStats(RF_Raid_t *raidPtr)
{
long elapsed_us, mbs, mbs_frac;
struct timeval diff;
RF_TIMEVAL_DIFF(&raidPtr->userstats.start, &raidPtr->userstats.stop, &diff);
elapsed_us = TIMEVAL_TO_US(diff);
/* 2000 sectors per megabyte, 10000000 microseconds per second */
if (elapsed_us)
mbs = (raidPtr->userstats.num_sect_moved / 2000) / (elapsed_us / 1000000);
else
mbs = 0;
/* this computes only the first digit of the fractional mb/s moved */
if (elapsed_us) {
mbs_frac = ((raidPtr->userstats.num_sect_moved / 200) / (elapsed_us / 1000000))
- (mbs * 10);
}
else {
mbs_frac = 0;
}
printf("Number of I/Os: %ld\n",raidPtr->userstats.num_ios);
printf("Elapsed time (us): %ld\n",elapsed_us);
printf("User I/Os per second: %ld\n",RF_DB0_CHECK(raidPtr->userstats.num_ios, (elapsed_us/1000000)));
printf("Average user response time: %ld us\n",RF_DB0_CHECK(raidPtr->userstats.sum_io_us, raidPtr->userstats.num_ios));
printf("Total sectors moved: %ld\n",raidPtr->userstats.num_sect_moved);
printf("Average access size (sect): %ld\n",RF_DB0_CHECK(raidPtr->userstats.num_sect_moved, raidPtr->userstats.num_ios));
printf("Achieved data rate: %ld.%ld MB/sec\n",mbs,mbs_frac);
}
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