101 lines
1.9 KiB
C
101 lines
1.9 KiB
C
/**
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* IBM IPR adapter drive write caching utility
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*
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* (C) Copyright 2005
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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/debug/iprcache.c,v 1.2 2005/12/16 17:04:41 brking 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 = "iprcache";
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struct ipr_caching_mode_page {
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/* Mode page 0x08 */
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struct ipr_mode_page_hdr hdr;
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#if defined (__BIG_ENDIAN_BITFIELD)
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u8 ic:1;
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u8 abpf:1;
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u8 cap:1;
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u8 disc:1;
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u8 size:1;
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u8 wce:1;
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u8 mf:1;
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u8 rcd:1;
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#elif defined (__LITTLE_ENDIAN_BITFIELD)
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u8 rcd:1;
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u8 mf:1;
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u8 wce:1;
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u8 size:1;
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u8 disc:1;
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u8 cap:1;
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u8 abpf:1;
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u8 ic:1;
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#endif
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u8 data[17];
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};
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static int set_caching_page(struct ipr_dev *dev)
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{
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struct ipr_mode_pages mode_pages;
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struct ipr_caching_mode_page *page;
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int rc;
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int len;
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rc = ipr_mode_sense(dev, 8, &mode_pages);
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if (rc)
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return rc;
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page = (struct ipr_caching_mode_page *) (((u8 *)&mode_pages) +
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mode_pages.hdr.block_desc_len +
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sizeof(mode_pages.hdr));
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page->wce = 0;
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len = mode_pages.hdr.length + 1;
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mode_pages.hdr.length = 0;
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mode_pages.hdr.medium_type = 0;
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mode_pages.hdr.device_spec_parms = 0;
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page->hdr.parms_saveable = 0;
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rc = ipr_mode_select(dev, &mode_pages, len);
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return rc;
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}
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int main(int argc, char *argv[])
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{
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struct ipr_dev *dev;
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openlog("iprcache", LOG_PERROR | LOG_PID | LOG_CONS, LOG_USER);
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tool_init(1);
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check_current_config(false);
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dev = find_gen_dev(argv[1]);
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if (!dev)
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dev = find_blk_dev(argv[1]);
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if (!dev) {
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fprintf(stderr, "Cannot find %s\n", argv[1]);
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return -EINVAL;
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}
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return set_caching_page(dev);
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}
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