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/*
* Linux Scsi Devices Cluster
*
* Copyright (c) 2014 Red Hat.
* Copyright (c) 2000,2004 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include "pmapi.h"
#include "impl.h"
#include "pmda.h"
#include "indom.h"
#include "proc_scsi.h"
static char diskname[64];
static char tapename[64];
static char cdromname[64];
int
refresh_proc_scsi(proc_scsi_t *scsi)
{
char buf[1024];
char name[1024];
int i;
int n;
FILE *fp;
char *sp;
static int have_devfs = -1;
static int next_id = -1;
if (next_id < 0) {
/* one trip initialization */
next_id = 0;
scsi->nscsi = 0;
scsi->scsi = (scsi_entry_t *)malloc(sizeof(scsi_entry_t));
/* scsi indom */
scsi->scsi_indom->it_numinst = 0;
scsi->scsi_indom->it_set = (pmdaInstid *)malloc(sizeof(pmdaInstid));
/* devfs naming convention */
have_devfs = access("/dev/.devfsd", F_OK) == 0;
if (have_devfs) {
strcpy(diskname, "scsi/host%d/bus%d/target%d/lun%d/disc");
strcpy(tapename, "st0");
strcpy(cdromname, "scd0");
}
else {
strcpy(diskname, "sda");
strcpy(tapename, "st0");
strcpy(cdromname, "scd0");
}
}
if ((fp = linux_statsfile("/proc/scsi/scsi", buf, sizeof(buf))) == NULL)
return -oserror();
while (fgets(buf, sizeof(buf), fp) != NULL) {
scsi_entry_t x = { 0 };
if (strncmp(buf, "Host:", 5) != 0)
continue;
n = sscanf(buf, "Host: scsi%d Channel: %d Id: %d Lun: %d",
&x.dev_host, &x.dev_channel, &x.dev_id, &x.dev_lun);
if (n != 4)
continue;
for (i=0; i < scsi->nscsi; i++) {
if (scsi->scsi[i].dev_host == x.dev_host &&
scsi->scsi[i].dev_channel == x.dev_channel &&
scsi->scsi[i].dev_id == x.dev_id &&
scsi->scsi[i].dev_lun == x.dev_lun)
break;
}
if (i == scsi->nscsi) {
scsi->nscsi++;
scsi->scsi = (scsi_entry_t *)realloc(scsi->scsi,
scsi->nscsi * sizeof(scsi_entry_t));
memcpy(&scsi->scsi[i], &x, sizeof(scsi_entry_t));
scsi->scsi[i].id = next_id++;
/* scan for the Vendor: and Type: strings */
while (fgets(buf, sizeof(buf), fp) != NULL) {
if ((sp = strstr(buf, "Type:")) != (char *)NULL) {
if (sscanf(sp, "Type: %s", name) == 1)
scsi->scsi[i].dev_type = strdup(name);
else
scsi->scsi[i].dev_type = strdup("unknown");
break;
}
}
if (strcmp(scsi->scsi[i].dev_type, "Direct-Access") == 0) {
if (have_devfs) {
scsi->scsi[i].dev_name = (char *)malloc(64);
sprintf(scsi->scsi[i].dev_name, diskname,
scsi->scsi[i].dev_host, scsi->scsi[i].dev_channel,
scsi->scsi[i].dev_id, scsi->scsi[i].dev_lun);
}
else {
scsi->scsi[i].dev_name = strdup(diskname);
diskname[2]++; /* sd[a-z] bump to next disk device name */
}
}
else
if (strcmp(scsi->scsi[i].dev_type, "Sequential-Access") == 0) {
scsi->scsi[i].dev_name = strdup(tapename);
tapename[2]++; /* st[0-9] bump to next tape device name */
}
else
if (strcmp(scsi->scsi[i].dev_type, "CD-ROM") == 0) {
scsi->scsi[i].dev_name = strdup(cdromname);
cdromname[3]++; /* scd[0-9] bump to next CDROM device name */
}
else
if (strcmp(scsi->scsi[i].dev_type, "Processor") == 0)
scsi->scsi[i].dev_name = strdup("SCSI Controller");
else
scsi->scsi[i].dev_name = strdup("Unknown SCSI device");
sprintf(name, "scsi%d:%d:%d:%d %s", scsi->scsi[i].dev_host,
scsi->scsi[i].dev_channel, scsi->scsi[i].dev_id, scsi->scsi[i].dev_lun, scsi->scsi[i].dev_type);
scsi->scsi[i].namebuf = strdup(name);
#if PCP_DEBUG
if (pmDebug & DBG_TRACE_LIBPMDA) {
fprintf(stderr, "refresh_proc_scsi: add host=scsi%d channel=%d id=%d lun=%d type=%s\n",
scsi->scsi[i].dev_host, scsi->scsi[i].dev_channel,
scsi->scsi[i].dev_id, scsi->scsi[i].dev_lun,
scsi->scsi[i].dev_type);
}
#endif
}
}
/* refresh scsi indom */
if (scsi->scsi_indom->it_numinst != scsi->nscsi) {
scsi->scsi_indom->it_numinst = scsi->nscsi;
scsi->scsi_indom->it_set = (pmdaInstid *)realloc(scsi->scsi_indom->it_set,
scsi->nscsi * sizeof(pmdaInstid));
memset(scsi->scsi_indom->it_set, 0, scsi->nscsi * sizeof(pmdaInstid));
}
for (i=0; i < scsi->nscsi; i++) {
scsi->scsi_indom->it_set[i].i_inst = scsi->scsi[i].id;
scsi->scsi_indom->it_set[i].i_name = scsi->scsi[i].namebuf;
}
fclose(fp);
return 0;
}
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