CVSROOT: /cvs/dm Module name: multipath-tools Branch: RHEL4_FC5 Changes by: bmarzins@xxxxxxxxxxxxxx 2007-07-23 21:37:10 Modified files: . : Makefile Added files: path_priority/pp_tpc: Makefile pp_tpc.c Log message: Fix for bz #247891. Added mpath_prio_tpc priority callout to RHEL4. Patches: http://sourceware.org/cgi-bin/cvsweb.cgi/multipath-tools/Makefile.diff?cvsroot=dm&only_with_tag=RHEL4_FC5&r1=1.6&r2=1.6.2.1 http://sourceware.org/cgi-bin/cvsweb.cgi/multipath-tools/path_priority/pp_tpc/Makefile.diff?cvsroot=dm&only_with_tag=RHEL4_FC5&r1=NONE&r2=1.1.4.1 http://sourceware.org/cgi-bin/cvsweb.cgi/multipath-tools/path_priority/pp_tpc/pp_tpc.c.diff?cvsroot=dm&only_with_tag=RHEL4_FC5&r1=NONE&r2=1.2.4.1 --- multipath-tools/Makefile 2006/04/24 23:50:01 1.6 +++ multipath-tools/Makefile 2007/07/23 21:37:10 1.6.2.1 @@ -22,14 +22,14 @@ BUILDDIRS = libmultipath libcheckers path_priority/pp_emc \ path_priority/pp_alua path_priority/pp_netapp \ - path_priority/pp_hds_modular multipath multipathd \ - kpartx + path_priority/pp_hds_modular path_priority/pp_tpc \ + multipath multipathd kpartx ALLDIRS = $(shell find . -type d -maxdepth 1 -mindepth 1) VERSION = $(shell basename ${PWD} | cut -d'-' -f3) INSTALLDIRS = multipath multipathd kpartx path_priority/pp_emc \ path_priority/pp_alua path_priority/pp_netapp \ - path_priority/pp_hds_modular + path_priority/pp_hds_modular path_priority/pp_tpc all: recurse /cvs/dm/multipath-tools/path_priority/pp_tpc/Makefile,v --> standard output revision 1.1.4.1 --- multipath-tools/path_priority/pp_tpc/Makefile +++ - 2007-07-23 21:37:11.419612000 +0000 @@ -0,0 +1,22 @@ +EXEC = mpath_prio_tpc +BUILD = glibc +OBJS = pp_tpc.o + +TOPDIR = ../.. +include $(TOPDIR)/Makefile.inc + +all: $(BUILD) + +glibc: $(OBJS) + $(CC) -o $(EXEC) $(OBJS) $(LDFLAGS) + +klibc: $(OBJS) + $(CC) -static -o $(EXEC) $(OBJS) + +install: $(EXEC) + install -m 755 $(EXEC) $(DESTDIR)$(bindir)/$(EXEC) + +uninstall: + rm $(DESTDIR)$(bindir)/$(EXEC) +clean: + rm -f *.o $(EXEC) /cvs/dm/multipath-tools/path_priority/pp_tpc/pp_tpc.c,v --> standard output revision 1.2.4.1 --- multipath-tools/path_priority/pp_tpc/pp_tpc.c +++ - 2007-07-23 21:37:11.497489000 +0000 @@ -0,0 +1,113 @@ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <unistd.h> +#include <fcntl.h> +#include <sys/ioctl.h> +#include <errno.h> + +#define __user +#include <scsi/sg.h> + +#define INQUIRY_CMD 0x12 +#define INQUIRY_CMDLEN 6 + +int sgi_tpc_prio(const char *dev) +{ + unsigned char sense_buffer[256]; + unsigned char sb[128]; + unsigned char inqCmdBlk[INQUIRY_CMDLEN] = {INQUIRY_CMD, 1, 0xC9, 0, + sizeof(sb), 0}; + struct sg_io_hdr io_hdr; + int ret = 0; + int fd; + + fd = open(dev, O_RDWR|O_NONBLOCK); + + if (fd <= 0) { + fprintf(stderr, "opening of the device failed.\n"); + goto out; + } + + memset(&io_hdr, 0, sizeof (struct sg_io_hdr)); + io_hdr.interface_id = 'S'; + io_hdr.cmd_len = sizeof (inqCmdBlk); + io_hdr.mx_sb_len = sizeof (sb); + io_hdr.dxfer_direction = SG_DXFER_FROM_DEV; + io_hdr.dxfer_len = sizeof (sense_buffer); + io_hdr.dxferp = sense_buffer; + io_hdr.cmdp = inqCmdBlk; + io_hdr.sbp = sb; + io_hdr.timeout = 60000; + io_hdr.pack_id = 0; + if (ioctl(fd, SG_IO, &io_hdr) < 0) { + fprintf(stderr, "sending inquiry command failed\n"); + goto out; + } + if (io_hdr.info & SG_INFO_OK_MASK) { + fprintf(stderr, "inquiry command indicates error"); + goto out; + } + + close(fd); + + if (/* Verify the code page - right page & page identifier */ + sense_buffer[1] != 0xc9 || + sense_buffer[3] != 0x2c || + sense_buffer[4] != 'v' || + sense_buffer[5] != 'a' || + sense_buffer[6] != 'c' ) { + fprintf(stderr, "Volume access control page in unknown format"); + goto out; + } + + if ( /* Current Volume Path Bit */ + ( sense_buffer[8] & 0x01) == 0x01 ) { + /* + * This volume was owned by the controller receiving + * the inquiry command. + */ + ret |= 0x01; + } + + /* Volume Preferred Path Priority */ + switch ( sense_buffer[9] & 0x0F ) { + case 0x01: + /* + * Access to this volume is most preferred through + * this path and other paths with this value. + */ + ret |= 0x02; + break; + case 0x02: + /* + * Access to this volume through this path is to be used + * as a secondary path. Typically this path would be used + * for fail-over situations. + */ + /* Fallthrough */ + default: + /* Reserved values */ + break; + } + +out: + return(ret); +} + +int +main (int argc, char **argv) +{ + int prio; + if (argc != 2) { + fprintf(stderr, "Wrong number of arguments.\n"); + fprintf(stderr, "Usage: %s device\n", argv[0]); + prio = 0; + } else + prio = sgi_tpc_prio(argv[1]); + + printf("%d\n", prio); + exit(0); +} -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
