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NetBSD/sbin/raidctl/rf_configure.c

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/*
* Copyright (c) 1995 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Mark Holland
*
* 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_configure.c -- code related to configuring the raidframe system
*
* configuration is complicated by the fact that we want the same
* driver to work both in the kernel and at user level. In the
* kernel, we can't read the configuration file, so we configure
* by running a user-level program that reads the config file,
* creates a data structure describing the configuration and
* passes it into the kernel via an ioctl. Since we want the config
* code to be common between the two versions of the driver, we
* configure using the same two-step process when running at
* user level. Of course, at user level, the config structure is
* passed directly to the config routine, rather than via ioctl.
*
* This file is not compiled into the kernel, so we have no
* need for KERNEL ifdefs.
*
**************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <strings.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "rf_raid.h"
#include "rf_raidframe.h"
#include "rf_utils.h"
#include "rf_general.h"
#include "rf_decluster.h"
#include "rf_configure.h"
#include "rf_sys.h"
/*
XXX we include this here so we don't need to drag rf_debugMem.c into
the picture... This is userland, afterall...
*/
/* XXX sucky hack to override the defn. of RF_Malloc as given in
rf_debugMem.c... but I *really* don't want (nor need) to link with
that file here in userland.. GO
*/
#undef RF_Malloc
#define RF_Malloc(_p_, _size_, _cast_) \
{ \
_p_ = _cast_ malloc((u_long)_size_); \
bzero((char *)_p_, _size_); \
}
#ifndef SIMULATE
static unsigned int dev_name2num(char *s);
static unsigned int osf_dev_name2num(char *s);
#endif
static int rf_search_file_for_start_of(char *string, char *buf, int len,
FILE *fp);
static int rf_get_next_nonblank_line(char *buf, int len, FILE *fp,
char *errmsg);
/* called from user level to read the configuration file and create
* a configuration control structure. This is used in the user-level
* version of the driver, and in the user-level program that configures
* the system via ioctl.
*/
int rf_MakeConfig(configname, cfgPtr)
char *configname;
RF_Config_t *cfgPtr;
{
int numscanned, val, r, c, retcode, aa, bb, cc;
char buf[256], buf1[256], *cp;
RF_LayoutSW_t *lp;
FILE *fp;
bzero((char *)cfgPtr, sizeof(RF_Config_t));
fp = fopen(configname, "r");
if (!fp) {
RF_ERRORMSG1("Can't open config file %s\n",configname);
return(-1);
}
rewind(fp);
if (rf_search_file_for_start_of("array", buf, 256, fp)) {
RF_ERRORMSG1("Unable to find start of \"array\" params in config file %s\n",configname);
retcode = -1; goto out;
}
rf_get_next_nonblank_line(buf, 256, fp, "Config file error (\"array\" section): unable to get numRow and numCol\n");
/*
* wackiness with aa, bb, cc to get around size problems on different platforms
*/
numscanned = sscanf(buf,"%d %d %d", &aa, &bb, &cc);
if (numscanned != 3) {
RF_ERRORMSG("Config file error (\"array\" section): unable to get numRow, numCol, numSpare\n");
retcode = -1; goto out;
}
cfgPtr->numRow = (RF_RowCol_t)aa;
cfgPtr->numCol = (RF_RowCol_t)bb;
cfgPtr->numSpare = (RF_RowCol_t)cc;
/* debug section is optional */
for (c=0; c<RF_MAXDBGV; c++)
cfgPtr->debugVars[c][0] = '\0';
rewind(fp);
if (!rf_search_file_for_start_of("debug", buf, 256, fp)) {
for (c=0; c < RF_MAXDBGV; c++) {
if (rf_get_next_nonblank_line(buf, 256, fp, NULL)) break;
cp = rf_find_non_white(buf);
if (!strncmp(cp, "START", strlen("START"))) break;
(void) strcpy(&cfgPtr->debugVars[c][0], cp);
}
}
rewind(fp);
strcpy(cfgPtr->diskQueueType,"fifo");
cfgPtr->maxOutstandingDiskReqs = 1;
/* scan the file for the block related to disk queues */
if (rf_search_file_for_start_of("queue",buf,256,fp)) {
RF_ERRORMSG2("[No disk queue discipline specified in config file %s. Using %s.]\n",configname, cfgPtr->diskQueueType);
} else {
if (rf_get_next_nonblank_line(buf, 256, fp, NULL)) {
RF_ERRORMSG2("[No disk queue discipline specified in config file %s. Using %s.]\n",configname, cfgPtr->diskQueueType);
}
}
/* the queue specifier line contains two entries:
* 1st char of first word specifies queue to be used
* 2nd word specifies max num reqs that can be outstanding on the disk itself (typically 1)
*/
if (sscanf(buf,"%s %d",buf1,&val)!=2) {
RF_ERRORMSG1("Can't determine queue type and/or max outstanding reqs from line: %s",buf);
RF_ERRORMSG2("Using %s-%d\n", cfgPtr->diskQueueType, cfgPtr->maxOutstandingDiskReqs);
} else {
char *c;
bcopy(buf1, cfgPtr->diskQueueType, RF_MIN(sizeof(cfgPtr->diskQueueType), strlen(buf1)+1));
for(c=buf1;*c;c++) {
if (*c == ' ') {
*c = '\0';
break;
}
}
cfgPtr->maxOutstandingDiskReqs = val;
}
rewind(fp);
if (rf_search_file_for_start_of("disks",buf,256,fp)) {
RF_ERRORMSG1("Can't find \"disks\" section in config file %s\n",configname);
retcode = -1; goto out;
}
for (r=0; r<cfgPtr->numRow; r++) {
for (c=0; c<cfgPtr->numCol; c++) {
if (rf_get_next_nonblank_line(&cfgPtr->devnames[r][c][0], 50, fp, NULL)) {
RF_ERRORMSG2("Config file error: unable to get device file for disk at row %d col %d\n",r,c);
retcode = -1; goto out;
}
#ifndef SIMULATE
val = dev_name2num(&cfgPtr->devnames[r][c][0]);
if (val < 0) {
RF_ERRORMSG3("Config file error: can't get dev num (dev file '%s') for disk at row %d c %d\n",
&cfgPtr->devnames[r][c][0],r,c);
retcode = -1; goto out;
} else cfgPtr->devs[r][c] = val;
#endif /* !SIMULATE */
}
}
/* "spare" section is optional */
rewind(fp);
if (rf_search_file_for_start_of("spare",buf,256,fp)) cfgPtr->numSpare =0;
for (c = 0; c < cfgPtr->numSpare; c++) {
if (rf_get_next_nonblank_line(&cfgPtr->spare_names[c][0], 256, fp, NULL)) {
RF_ERRORMSG1("Config file error: unable to get device file for spare disk %d\n",c);
retcode = -1; goto out;
}
#ifndef SIMULATE
val = dev_name2num(&cfgPtr->spare_names[c][0]);
if (val < 0) {
RF_ERRORMSG2("Config file error: can't get dev num (dev file '%s') for spare disk %d\n",
&cfgPtr->spare_names[c][0],c);
retcode = -1; goto out;
} else cfgPtr->spare_devs[c] = val;
#endif /* !SIMULATE */
}
/* scan the file for the block related to layout */
rewind(fp);
if (rf_search_file_for_start_of("layout",buf,256,fp)) {
RF_ERRORMSG1("Can't find \"layout\" section in configuration file %s\n",configname);
retcode = -1; goto out;
}
if (rf_get_next_nonblank_line(buf, 256, fp, NULL)) {
RF_ERRORMSG("Config file error (\"layout\" section): unable to find common layout param line\n");
retcode = -1; goto out;
}
c = sscanf(buf,"%d %d %d %c", &aa, &bb, &cc, &cfgPtr->parityConfig);
cfgPtr->sectPerSU = (RF_SectorNum_t)aa;
cfgPtr->SUsPerPU = (RF_StripeNum_t)bb;
cfgPtr->SUsPerRU = (RF_StripeNum_t)cc;
if (c != 4) {
RF_ERRORMSG("Unable to scan common layout line\n");
retcode = -1; goto out;
}
lp = rf_GetLayout(cfgPtr->parityConfig);
if (lp == NULL) {
RF_ERRORMSG1("Unknown parity config '%c'\n", cfgPtr->parityConfig);
retcode = -1;
goto out;
}
/* XXX who cares.. it's not going into the kernel, so we should ignore this... */
#ifndef KERNEL
retcode = lp->MakeLayoutSpecific(fp, cfgPtr, lp->makeLayoutSpecificArg);
#endif
out:
fclose(fp);
if (retcode < 0)
retcode = errno = EINVAL;
else
errno = retcode;
return(retcode);
}
/* used in architectures such as RAID0 where there is no layout-specific
* information to be passed into the configuration code.
*/
int rf_MakeLayoutSpecificNULL(fp, cfgPtr, ignored)
FILE *fp;
RF_Config_t *cfgPtr;
void *ignored;
{
cfgPtr->layoutSpecificSize = 0;
cfgPtr->layoutSpecific = NULL;
return(0);
}
int rf_MakeLayoutSpecificDeclustered(configfp, cfgPtr, arg)
FILE *configfp;
RF_Config_t *cfgPtr;
void *arg;
{
int b, v, k, r, lambda, norotate, i, val, distSpare;
char *cfgBuf, *bdfile, *p, *smname;
char buf[256], smbuf[256];
FILE *fp;
distSpare = *((int *)arg);
/* get the block design file name */
if (rf_get_next_nonblank_line(buf,256,configfp,"Can't find block design file name in config file\n"))
return(EINVAL);
bdfile = rf_find_non_white(buf);
if (bdfile[strlen(bdfile)-1] == '\n') {
/* strip newline char */
bdfile[strlen(bdfile)-1] = '\0';
}
/* open bd file, check validity of configuration */
if ((fp = fopen(bdfile,"r"))==NULL) {
RF_ERRORMSG1("RAID: config error: Can't open layout table file %s\n",bdfile);
return(EINVAL);
}
fgets(buf,256,fp);
i = sscanf(buf,"%u %u %u %u %u %u",&b,&v,&k,&r,&lambda,&norotate);
if (i == 5)
norotate = 0; /* no-rotate flag is optional */
else if (i != 6) {
RF_ERRORMSG("Unable to parse header line in block design file\n");
return(EINVAL);
}
/* set the sparemap directory. In the in-kernel version, there's a daemon
* that's responsible for finding the sparemaps
*/
if (distSpare) {
if (rf_get_next_nonblank_line(smbuf,256,configfp,"Can't find sparemap file name in config file\n"))
return(EINVAL);
smname = rf_find_non_white(smbuf);
if (smname[strlen(smname)-1] == '\n') {
/* strip newline char */
smname[strlen(smname)-1] = '\0';
}
}
else {
smbuf[0] = '\0';
smname = smbuf;
}
/* allocate a buffer to hold the configuration info */
cfgPtr->layoutSpecificSize = RF_SPAREMAP_NAME_LEN + 6 * sizeof(int) + b * k;
/* can't use RF_Malloc here b/c debugMem module not yet init'd */
cfgBuf = (char *) malloc(cfgPtr->layoutSpecificSize);
cfgPtr->layoutSpecific = (void *) cfgBuf;
p = cfgBuf;
/* install name of sparemap file */
for (i=0; smname[i]; i++)
*p++ = smname[i];
/* pad with zeros */
while (i<RF_SPAREMAP_NAME_LEN) {
*p++ = '\0';
i++;
}
/*
* fill in the buffer with the block design parameters
* and then the block design itself
*/
*( (int *) p) = b; p += sizeof(int);
*( (int *) p) = v; p += sizeof(int);
*( (int *) p) = k; p += sizeof(int);
*( (int *) p) = r; p += sizeof(int);
*( (int *) p) = lambda; p += sizeof(int);
*( (int *) p) = norotate; p += sizeof(int);
while (fscanf(fp,"%d",&val) == 1)
*p++ = (char) val;
fclose(fp);
if (p - cfgBuf != cfgPtr->layoutSpecificSize) {
RF_ERRORMSG2("Size mismatch creating layout specific data: is %d sb %d bytes\n",(int)(p-cfgBuf),(int)(6*sizeof(int)+b*k));
return(EINVAL);
}
return(0);
}
/****************************************************************************
*
* utilities
*
***************************************************************************/
#ifndef SIMULATE
/* convert a device file name to a device number */
static unsigned int dev_name2num(s)
char *s;
{
struct stat buf;
if (stat(s, &buf) < 0) return(osf_dev_name2num(s));
else return(buf.st_rdev);
}
/* converts an osf/1 style device name to a device number. We use this
* only if the stat of the device file fails.
*/
static unsigned int osf_dev_name2num(s)
char *s;
{
int num;
char part_ch, lun_ch;
unsigned int bus, target, lun, part, dev_major;
dev_major = RF_SCSI_DISK_MAJOR;
if (sscanf(s,"/dev/rrz%d%c", &num, &part_ch) == 2) {
bus = num>>3;
target = num & 0x7;
part = part_ch - 'a';
lun = 0;
} else if (sscanf(s,"/dev/rrz%c%d%c", &lun_ch, &num, &part_ch) == 3) {
bus = num>>3;
target = num & 0x7;
part = part_ch - 'a';
lun = lun_ch - 'a' + 1;
} else {
RF_ERRORMSG1("Unable to parse disk dev file name %s\n",s);
return(-1);
}
return( (dev_major<<20) | (bus<<14) | (target<<10) | (lun<<6) | part );
}
#endif
/* searches a file for a line that says "START string", where string is
* specified as a parameter
*/
static int rf_search_file_for_start_of(string, buf, len, fp)
char *string;
char *buf;
int len;
FILE *fp;
{
char *p;
while (1) {
if (fgets(buf, len, fp) == NULL) return(-1);
p = rf_find_non_white(buf);
if (!strncmp(p, "START", strlen("START"))) {
p = rf_find_white(p);
p = rf_find_non_white(p);
if (!strncmp(p, string, strlen(string))) return(0);
}
}
}
/* reads from file fp into buf until it finds an interesting line */
int rf_get_next_nonblank_line(buf, len, fp, errmsg)
char *buf;
int len;
FILE *fp;
char *errmsg;
{
char *p;
while (fgets(buf,256,fp) != NULL) {
p = rf_find_non_white(buf);
if (*p == '\n' || *p == '\0' || *p == '#') continue;
return(0);
}
if (errmsg) RF_ERRORMSG(errmsg);
return(1);
}
/* Allocates an array for the spare table, and initializes it from a file.
* In the user-level version, this is called when recon is initiated.
* When/if I move recon into the kernel, there'll be a daemon that does
* an ioctl into raidframe which will block until a spare table is needed.
* When it returns, it will read a spare table from the file system,
* pass it into the kernel via a different ioctl, and then block again
* on the original ioctl.
*
* This is specific to the declustered layout, but doesn't belong in
* rf_decluster.c because it uses stuff that can't be compiled into
* the kernel, and it needs to be compiled into the user-level sparemap daemon.
*
*/
void *rf_ReadSpareTable(req, fname)
RF_SparetWait_t *req;
char *fname;
{
int i, j, numFound, linecount, tableNum, tupleNum, spareDisk, spareBlkOffset;
char buf[1024], targString[100], errString[100];
RF_SpareTableEntry_t **table;
FILE *fp;
/* allocate and initialize the table */
RF_Malloc(table, req->TablesPerSpareRegion * sizeof(RF_SpareTableEntry_t *), (RF_SpareTableEntry_t **));
for (i=0; i<req->TablesPerSpareRegion; i++) {
RF_Malloc(table[i], req->BlocksPerTable * sizeof(RF_SpareTableEntry_t), (RF_SpareTableEntry_t *));
for (j=0; j<req->BlocksPerTable; j++) table[i][j].spareDisk = table[i][j].spareBlockOffsetInSUs = -1;
}
/* 2. open sparemap file, sanity check */
if ((fp = fopen(fname,"r"))==NULL) {
fprintf(stderr,"rf_ReadSpareTable: Can't open sparemap file %s\n",fname); return(NULL);
}
if (rf_get_next_nonblank_line(buf,1024,fp,"Invalid sparemap file: can't find header line\n"))
return(NULL);
if (buf[strlen(buf)-1] == '\n')
buf[strlen(buf)-1] = '\0';
sprintf(targString, "fdisk %d\n", req->fcol);
sprintf(errString, "Invalid sparemap file: can't find \"fdisk %d\" line\n",req->fcol);
while (1) {
rf_get_next_nonblank_line(buf,1024,fp,errString);
if (!strncmp(buf,targString,strlen(targString))) break;
}
/* no more blank lines or comments allowed now */
linecount = req->TablesPerSpareRegion * req->TableDepthInPUs;
for (i=0; i<linecount; i++) {
numFound = fscanf(fp," %d %d %d %d",&tableNum, &tupleNum, &spareDisk, &spareBlkOffset);
if (numFound != 4) {
fprintf(stderr,"Sparemap file prematurely exhausted after %d of %d lines\n",i,linecount); return(NULL);
}
RF_ASSERT(tableNum >= 0 && tableNum < req->TablesPerSpareRegion);
RF_ASSERT(tupleNum >= 0 && tupleNum < req->BlocksPerTable);
RF_ASSERT(spareDisk >= 0 && spareDisk < req->C);
RF_ASSERT(spareBlkOffset >= 0 && spareBlkOffset < req->SpareSpaceDepthPerRegionInSUs / req->SUsPerPU);
table[tableNum][tupleNum].spareDisk = spareDisk;
table[tableNum][tupleNum].spareBlockOffsetInSUs = spareBlkOffset * req->SUsPerPU;
}
fclose(fp);
return((void *) table);
}
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