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NetBSD/sys/dev/raidframe/rf_driver.c

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/* $NetBSD: rf_driver.c,v 1.55 2002/08/08 02:55:36 oster Exp $ */
/*-
* Copyright (c) 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Greg Oster
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* 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.
*
******************************************************************************/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: rf_driver.c,v 1.55 2002/08/08 02:55:36 oster Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ioctl.h>
#include <sys/fcntl.h>
#include <sys/vnode.h>
#include "rf_archs.h"
#include "rf_threadstuff.h"
#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_dagutils.h"
#include "rf_utils.h"
#include "rf_etimer.h"
#include "rf_acctrace.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_revent.h"
#include "rf_callback.h"
#include "rf_engine.h"
#include "rf_mcpair.h"
#include "rf_nwayxor.h"
#include "rf_debugprint.h"
#include "rf_copyback.h"
#include "rf_driver.h"
#include "rf_options.h"
#include "rf_shutdown.h"
#include "rf_kintf.h"
#include <sys/buf.h>
/* 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 */
#define SIGNAL_QUIESCENT_COND(_raid_) wakeup(&((_raid_)->accesses_suspended))
#define WAIT_FOR_QUIESCENCE(_raid_) \
ltsleep(&((_raid_)->accesses_suspended), PRIBIO, \
"raidframe quiesce", 0, &((_raid_)->access_suspend_mutex))
#define IO_BUF_ERR(bp, err) { \
bp->b_flags |= B_ERROR; \
bp->b_resid = bp->b_bcount; \
bp->b_error = err; \
biodone(bp); \
}
static int configureCount = 0; /* number of active configurations */
static int isconfigged = 0; /* is basic raidframe (non per-array)
* stuff configged */
RF_DECLARE_LKMGR_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()
{
int rc;
if (raidframe_booted)
return (EBUSY);
raidframe_booted = 1;
rc = rf_lkmgr_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_LKMGR_MUTEX(configureMutex);
if (configureCount) {
RF_UNLOCK_LKMGR_MUTEX(configureMutex);
return (EBUSY);
}
raidframe_booted = 0;
RF_UNLOCK_LKMGR_MUTEX(configureMutex);
rc = rf_lkmgr_mutex_destroy(&configureMutex);
if (rc) {
RF_ERRORMSG3("Unable to destroy mutex file %s line %d rc=%d\n", __FILE__,
__LINE__, rc);
RF_PANIC();
}
return (0);
}
/*
* Called whenever an array is shutdown
*/
static void
rf_UnconfigureArray()
{
int rc;
RF_LOCK_LKMGR_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);
}
/*
* We must wait until now, because the AllocList module
* uses the DebugMem module.
*/
if (rf_memDebug)
rf_print_unfreed();
}
RF_UNLOCK_LKMGR_MUTEX(configureMutex);
}
/*
* Called to shut down an array.
*/
int
rf_Shutdown(raidPtr)
RF_Raid_t *raidPtr;
{
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);
/* Wait for any parity re-writes to stop... */
while (raidPtr->parity_rewrite_in_progress) {
printf("Waiting for parity re-write to exit...\n");
tsleep(&raidPtr->parity_rewrite_in_progress, PRIBIO,
"rfprwshutdown", 0);
}
raidPtr->valid = 0;
rf_update_component_labels(raidPtr, RF_FINAL_COMPONENT_UPDATE);
rf_UnconfigureVnodes(raidPtr);
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_LKMGR_MUTEX(configureMutex); \
return(rc); \
} \
}
#define DO_RAID_FAIL() { \
rf_UnconfigureVnodes(raidPtr); \
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, ac)
RF_Raid_t *raidPtr;
RF_Config_t *cfgPtr;
RF_AutoConfig_t *ac;
{
RF_RowCol_t row, col;
int i, rc;
RF_LOCK_LKMGR_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 */
DO_INIT_CONFIGURE(rf_ConfigureAllocList);
/*
* 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);
DO_INIT_CONFIGURE(rf_ConfigureAccessTrace);
DO_INIT_CONFIGURE(rf_ConfigureMapModule);
DO_INIT_CONFIGURE(rf_ConfigureReconEvent);
DO_INIT_CONFIGURE(rf_ConfigureCallback);
DO_INIT_CONFIGURE(rf_ConfigureRDFreeList);
DO_INIT_CONFIGURE(rf_ConfigureNWayXor);
DO_INIT_CONFIGURE(rf_ConfigureStripeLockFreeList);
DO_INIT_CONFIGURE(rf_ConfigureMCPair);
DO_INIT_CONFIGURE(rf_ConfigureDAGs);
DO_INIT_CONFIGURE(rf_ConfigureDAGFuncs);
DO_INIT_CONFIGURE(rf_ConfigureReconstruction);
DO_INIT_CONFIGURE(rf_ConfigureCopyback);
DO_INIT_CONFIGURE(rf_ConfigureDiskQueueSystem);
isconfigged = 1;
}
RF_UNLOCK_LKMGR_MUTEX(configureMutex);
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;
/* 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);
}
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);
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);
if (ac!=NULL) {
/* We have an AutoConfig structure.. Don't do the
normal disk configuration... call the auto config
stuff */
rf_AutoConfigureDisks(raidPtr, cfgPtr, ac);
} else {
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);
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;
}
}
raidPtr->numNewFailures = 0;
raidPtr->copyback_in_progress = 0;
raidPtr->parity_rewrite_in_progress = 0;
raidPtr->recon_in_progress = 0;
raidPtr->maxOutstanding = cfgPtr->maxOutstandingDiskReqs;
/* autoconfigure and root_partition will actually get filled in
after the config is done */
raidPtr->autoconfigure = 0;
raidPtr->root_partition = 0;
raidPtr->last_unit = raidPtr->raidid;
raidPtr->config_order = 0;
if (rf_keepAccTotals) {
raidPtr->keep_acc_totals = 1;
}
rf_StartUserStats(raidPtr);
raidPtr->valid = 1;
printf("raid%d: %s\n", raidPtr->raidid,
raidPtr->Layout.map->configName);
printf("raid%d: Components:", raidPtr->raidid);
for (row = 0; row < raidPtr->numRow; row++) {
for (col = 0; col < raidPtr->numCol; col++) {
printf(" %s", raidPtr->Disks[row][col].devname);
if (RF_DEAD_DISK(raidPtr->Disks[row][col].status)) {
printf("[**FAILED**]");
}
}
}
printf("\n");
printf("raid%d: Total Sectors: %lu (%lu MB)\n",
raidPtr->raidid,
(unsigned long) raidPtr->totalSectors,
(unsigned long) (raidPtr->totalSectors / 1024 *
(1 << raidPtr->logBytesPerSector) / 1024));
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_RaidAccessFlags_t flags,
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 = NULL;
desc->paramASM = NULL;
desc->flags = flags;
desc->states = states;
desc->state = 0;
desc->status = 0;
memset((char *) &desc->tracerec, 0, sizeof(RF_AccTraceEntry_t));
desc->callbackFunc = NULL;
desc->callbackArg = NULL;
desc->next = NULL;
desc->head = desc;
desc->numPending = 0;
desc->cleanupList = NULL;
rf_MakeAllocList(desc->cleanupList);
return (desc);
}
void
rf_FreeRaidAccDesc(RF_RaidAccessDesc_t * desc)
{
RF_Raid_t *raidPtr = desc->raidPtr;
RF_ASSERT(desc);
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);
}
/*********************************************************************
* 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_RaidAccessFlags_t flags)
/*
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
*/
{
RF_RaidAccessDesc_t *desc;
caddr_t lbufPtr = bufPtr;
struct buf *bp = (struct buf *) bp_in;
raidAddress += rf_raidSectorOffset;
if (rf_accessDebug) {
printf("logBytes is: %d %d %d\n", raidPtr->raidid,
raidPtr->logBytesPerSector,
(int) rf_RaidAddressToByte(raidPtr, numBlocks));
printf("raid%d: %s raidAddr %d (stripeid %d-%d) numBlocks %d (%d bytes) buf 0x%lx\n", raidPtr->raidid,
(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);
IO_BUF_ERR(bp, ENOSPC);
return (ENOSPC);
}
desc = rf_AllocRaidAccDesc(raidPtr, type, raidAddress,
numBlocks, lbufPtr, bp, flags, raidPtr->Layout.map->states);
if (desc == NULL) {
return (ENOMEM);
}
RF_ETIMER_START(desc->tracerec.tot_timer);
desc->async_flag = async_flag;
rf_ContinueRaidAccess(desc);
return (0);
}
#if 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;
rf_update_component_labels(raidPtr, RF_NORMAL_COMPONENT_UPDATE);
/* 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);
}
#endif
int
rf_FailDisk(
RF_Raid_t * raidPtr,
int frow,
int fcol,
int initRecon)
{
printf("raid%d: Failing disk r%d c%d\n", raidPtr->raidid, frow, fcol);
RF_LOCK_MUTEX(raidPtr->mutex);
raidPtr->numFailures++;
raidPtr->Disks[frow][fcol].status = rf_ds_failed;
raidPtr->status[frow] = rf_rs_degraded;
rf_update_component_labels(raidPtr, RF_NORMAL_COMPONENT_UPDATE);
RF_UNLOCK_MUTEX(raidPtr->mutex);
if (initRecon)
rf_ReconstructFailedDisk(raidPtr, frow, fcol);
return (0);
}
/* 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;
{
if (rf_quiesceDebug) {
printf("raid%d: Signalling quiescence lock\n",
raidPtr->raidid);
}
raidPtr->access_suspend_release = 1;
if (raidPtr->waiting_for_quiescence) {
SIGNAL_QUIESCENT_COND(raidPtr);
}
}
/* 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("raid%d: Suspending new reqs\n", raidPtr->raidid);
RF_LOCK_MUTEX(raidPtr->access_suspend_mutex);
raidPtr->accesses_suspended++;
raidPtr->waiting_for_quiescence = (raidPtr->accs_in_flight == 0) ? 0 : 1;
if (raidPtr->waiting_for_quiescence) {
raidPtr->access_suspend_release = 0;
while (!raidPtr->access_suspend_release) {
printf("raid%d: Suspending: Waiting for Quiescence\n",
raidPtr->raidid);
WAIT_FOR_QUIESCENCE(raidPtr);
raidPtr->waiting_for_quiescence = 0;
}
}
printf("raid%d: Quiescence reached..\n", raidPtr->raidid);
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);
}
void
rf_print_panic_message(line,file)
int line;
char *file;
{
sprintf(rf_panicbuf,"raidframe error at line %d file %s",
line, file);
}
void
rf_print_assert_panic_message(line,file,condition)
int line;
char *file;
char *condition;
{
sprintf(rf_panicbuf,
"raidframe error at line %d file %s (failed asserting %s)\n",
line, file, condition);
}
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