f640923deb
If the iprinit daemon runs prior to the sg module being loaded, it is not able to talk to the ipr adapters and do much of anything that is useful. This was observed on a system where the adapter write cache was not getting enabled at times during boot. This modifies iprinit to check to see if the sg module is loaded and also checks to see if its actually been bound to each ipr adapter yet. If not, it makes iprinit wait for a bit until this happens. Some distros load sg via a udev rule which can happen in parallel to iprinit starting, so this fixes this race. It also adds some informational logging to make it easier to track when this indeed does occur in case a system never loads the sg driver. Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
124 lines
2.8 KiB
C
124 lines
2.8 KiB
C
/**
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* IBM IPR adapter initialization utility
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*
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* (C) Copyright 2004, 2008
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* International Business Machines Corporation and others.
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* All Rights Reserved. This program and the accompanying
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* materials are made available under the terms of the
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* Common Public License v1.0 which accompanies this distribution.
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*
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*/
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/*
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* $Header: /cvsroot/iprdd/iprutils/iprinit.c,v 1.22 2008/11/20 01:20:20 wboyer Exp $
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*/
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <scsi/sg.h>
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#include <scsi/scsi.h>
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#include <sys/stat.h>
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#ifndef iprlib_h
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#include "iprlib.h"
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#endif
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#include <sys/mman.h>
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char *tool_name = "iprinit";
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static int init_all()
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{
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struct ipr_ioa *ioa;
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int rc = tool_init(1);
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if (rc && rc != -ENXIO) {
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if (daemonize)
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syslog(LOG_ERR, "Run iprinit manually to ensure all ipr RAID adapters are running optimally.\n");
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else
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syslog(LOG_ERR, "Error initializing adapters. Perhaps run with sudo?\n");
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}
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check_current_config(false);
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for_each_ioa(ioa) {
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if (!strlen(ioa->ioa.gen_name))
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rc |= -EAGAIN;
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ipr_init_ioa(ioa);
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}
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return rc;
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}
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static void kevent_handler(char *buf)
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{
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polling_mode = 0;
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if (!strncmp(buf, "change@/class/scsi_host", 23) ||
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(!strncmp(buf, "change@/devices/pci", 19) && strstr(buf, "scsi_host")))
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scsi_host_kevent(buf, ipr_init_ioa);
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else if (!strncmp(buf, "add@/class/scsi_generic", 23) ||
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(!strncmp(buf, "add@/devices/pci", 16) && strstr(buf, "scsi_generic")))
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scsi_dev_kevent(buf, find_gen_dev, ipr_init_dev);
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else if (!strncmp(buf, "add@/block/sd", 13))
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scsi_dev_kevent(buf, find_blk_dev, ipr_init_dev);
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}
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static void poll_ioas()
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{
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polling_mode = 1;
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init_all();
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}
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int main(int argc, char *argv[])
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{
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int i, rc, delay_secs, wait;
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ipr_sg_required = 1;
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openlog("iprinit", LOG_PERROR | LOG_PID | LOG_CONS, LOG_USER);
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for (i = 1; i < argc; i++) {
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if (parse_option(argv[i]))
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continue;
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else {
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printf("Usage: iprinit [options]\n");
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printf(" Options: --version [--daemon] Print iprinit version\n");
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return -EINVAL;
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}
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}
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rc = check_sg_module();
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if (daemonize) {
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ipr_daemonize();
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if (!rc)
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rc = init_all();
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if (rc) {
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syslog(LOG_INFO, "Waiting for ipr adapters and sg module to come ready.\n");
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delay_secs = 2;
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sleep(delay_secs);
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for (wait = 0; rc && wait < 300; wait += delay_secs) {
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rc = check_sg_module();
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sleep(delay_secs);
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if (!rc)
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rc = init_all();
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}
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if (rc)
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syslog(LOG_ERR, "Timeout reached. Ensure the sg module is loaded, then "
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"run iprinit manually to ensure all "
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"ipr RAID adapters are running optimally\n");
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}
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return handle_events(poll_ioas, 60, kevent_handler);
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} else if (!rc)
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rc = init_all();
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if (rc)
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syslog(LOG_ERR, "iprinit failed. Ensure the sg module is loaded, then "
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"run iprinit again to ensure all "
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"ipr RAID adapters are running optimally\n");
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return rc;
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}
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