Add cciss_tur checker

The 'normal' SG_IO tur checker has some issues with cciss, so
we'd better use a dedicated path checker here.

Signed-off-by: Hannes Reinecke <hare@suse.de>

diff --git a/libmultipath/checkers.h b/libmultipath/checkers.h
index 93337f1..4ff475d 100644 (file)
--- a/libmultipath/checkers.h
+++ b/libmultipath/checkers.h
@@ -61,6 +61,7 @@
 #define RDAC         "rdac"
 #define EMC_CLARIION "emc_clariion"
 #define READSECTOR0  "readsector0"
+#define CCISS_TUR    "cciss_tur"
 
 #define DEFAULT_CHECKER DIRECTIO
 

diff --git a/libmultipath/checkers/Makefile b/libmultipath/checkers/Makefile
index f37a0f9..9b517f2 100644 (file)
--- a/libmultipath/checkers/Makefile
+++ b/libmultipath/checkers/Makefile
@@ -5,6 +5,7 @@
 include ../../Makefile.inc
 
 LIBS= \
+       libcheckcciss_tur.so \
        libcheckreadsector0.so \
        libchecktur.so \
        libcheckdirectio.so \

diff --git a/libmultipath/checkers/cciss.h b/libmultipath/checkers/cciss.h
new file mode 100644 (file)
index 0000000..ebdff06
--- /dev/null
+++ b/libmultipath/checkers/cciss.h
@@ -0,0 +1,142 @@
+#ifndef CCISS_H
+#define CCISS_H
+
+#include <linux/types.h>
+#include <linux/ioctl.h>
+
+#define CCISS_IOC_MAGIC 'B'
+
+/*
+ * transfer direction
+ */
+#define XFER_NONE              0x00
+#define XFER_WRITE             0x01
+#define XFER_READ              0x02
+#define XFER_RSVD              0x03
+
+/*
+ * task attribute
+ */
+#define ATTR_UNTAGGED          0x00
+#define ATTR_SIMPLE            0x04
+#define ATTR_HEADOFQUEUE       0x05
+#define ATTR_ORDERED           0x06
+#define ATTR_ACA               0x07
+
+/*
+ * cdb type
+ */
+#define TYPE_CMD               0x00
+#define TYPE_MSG               0x01
+
+#define SENSEINFOBYTES         32
+
+/*
+ * Type defs used in the following structs
+ */
+#define BYTE __u8
+#define WORD __u16
+#define HWORD __u16
+#define DWORD __u32
+
+#pragma pack(1)
+
+//Command List Structure
+typedef union _SCSI3Addr_struct {
+   struct {
+    BYTE Dev;
+    BYTE Bus:6;
+    BYTE Mode:2;        // b00
+  } PeripDev;
+   struct {
+    BYTE DevLSB;
+    BYTE DevMSB:6;
+    BYTE Mode:2;        // b01
+  } LogDev;
+   struct {
+    BYTE Dev:5;
+    BYTE Bus:3;
+    BYTE Targ:6;
+    BYTE Mode:2;        // b10
+  } LogUnit;
+} SCSI3Addr_struct;
+
+typedef struct _PhysDevAddr_struct {
+  DWORD             TargetId:24;
+  DWORD             Bus:6;
+  DWORD             Mode:2;
+  SCSI3Addr_struct  Target[2]; //2 level target device addr
+} PhysDevAddr_struct;
+
+typedef struct _LogDevAddr_struct {
+  DWORD            VolId:30;
+  DWORD            Mode:2;
+  BYTE             reserved[4];
+} LogDevAddr_struct;
+
+typedef union _LUNAddr_struct {
+  BYTE               LunAddrBytes[8];
+  SCSI3Addr_struct   SCSI3Lun[4];
+  PhysDevAddr_struct PhysDev;
+  LogDevAddr_struct  LogDev;
+} LUNAddr_struct;
+
+typedef struct _RequestBlock_struct {
+  BYTE   CDBLen;
+  struct {
+    BYTE Type:3;
+    BYTE Attribute:3;
+    BYTE Direction:2;
+  } Type;
+  HWORD  Timeout;
+  BYTE   CDB[16];
+} RequestBlock_struct;
+
+typedef union _MoreErrInfo_struct{
+  struct {
+    BYTE  Reserved[3];
+    BYTE  Type;
+    DWORD ErrorInfo;
+  }Common_Info;
+  struct{
+    BYTE  Reserved[2];
+    BYTE  offense_size;//size of offending entry
+    BYTE  offense_num; //byte # of offense 0-base
+    DWORD offense_value;
+  }Invalid_Cmd;
+}MoreErrInfo_struct;
+
+typedef struct _ErrorInfo_struct {
+  BYTE               ScsiStatus;
+  BYTE               SenseLen;
+  HWORD              CommandStatus;
+  DWORD              ResidualCnt;
+  MoreErrInfo_struct MoreErrInfo;
+  BYTE               SenseInfo[SENSEINFOBYTES];
+} ErrorInfo_struct;
+
+#pragma pack()
+
+typedef struct _IOCTL_Command_struct {
+       LUNAddr_struct          LUN_info;
+       RequestBlock_struct     Request;
+       ErrorInfo_struct        error_info;
+       WORD                    buf_size;  /* size in bytes of the buf */
+       BYTE                    *buf;
+} IOCTL_Command_struct;
+
+typedef struct _LogvolInfo_struct{
+       __u32   LunID;
+       int     num_opens;  /* number of opens on the logical volume */
+       int     num_parts;  /* number of partitions configured on logvol */
+} LogvolInfo_struct;
+
+#define CCISS_PASSTHRU     _IOWR(CCISS_IOC_MAGIC, 11, IOCTL_Command_struct)
+#define CCISS_GETLUNINFO   _IOR(CCISS_IOC_MAGIC, 17, LogvolInfo_struct)
+
+int cciss_init( struct checker *);
+void cciss_free (struct checker * c);
+int cciss_tur( struct checker *);
+
+#endif
+

diff --git a/libmultipath/checkers/cciss_tur.c b/libmultipath/checkers/cciss_tur.c
new file mode 100644 (file)
index 0000000..4c26901
--- /dev/null
+++ b/libmultipath/checkers/cciss_tur.c
@@ -0,0 +1,137 @@
+/*
+ *****************************************************************************
+ *                                                                           *
+ *     (C)  Copyright 2007 Hewlett-Packard Development Company, L.P          *
+ *                                                                           *
+ * 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.                                                         *
+ *                                                                           *
+ * You should have received a copy of the GNU General Public License along   *
+ * with this program; if not, write to the Free Software Foundation, Inc.,   *
+ * 675 Mass Ave, Cambridge, MA 02139, USA.                                   *
+ *                                                                           *
+ * The copy of the GNU General Public License is available at                *
+ * /opt/hp/HPDMmultipath-tool directoy                                       *
+ *                                                                           *
+ *****************************************************************************
+*/
+
+/*
+ *  This program originally derived from and inspired by
+ *  Christophe Varoqui's tur.c, part of libchecker.
+ */
+
+
+#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>
+
+#include "checkers.h"
+
+#include "cciss.h"
+
+#define TUR_CMD_LEN 6
+#define HEAVY_CHECK_COUNT       10
+
+#define MSG_CCISS_TUR_UP       "cciss_tur checker reports path is up"
+#define MSG_CCISS_TUR_DOWN     "cciss_tur checker reports path is down"
+
+struct cciss_tur_checker_context {
+       void * dummy;
+};
+
+int libcheck_init (struct checker * c)
+{
+       return 0;
+}
+
+void libcheck_free (struct checker * c)
+{
+       return;
+}
+
+extern int
+libcheck_check (struct checker * c)
+{
+       int rc;
+       int ret;
+       unsigned int lun = 0;
+       struct cciss_tur_checker_context * ctxt = NULL;
+       LogvolInfo_struct    lvi;       // logical "volume" info
+       IOCTL_Command_struct cic;       // cciss ioctl command
+
+       if ((c->fd) <= 0) {
+               MSG(c,"no usable fd");
+               ret = -1;
+               goto out;
+       }
+
+       rc = ioctl(c->fd, CCISS_GETLUNINFO, &lvi);
+       if ( rc != 0) {
+               perror("Error: ");
+               fprintf(stderr, "cciss TUR  failed in CCISS_GETLUNINFO: %s\n",
+                       strerror(errno));
+               MSG(c,MSG_CCISS_TUR_DOWN);
+               ret = PATH_DOWN;
+               goto out;
+       } else {
+               lun = lvi.LunID;
+       }
+
+       memset(&cic, 0, sizeof(cic));
+       cic.LUN_info.LogDev.VolId = lun & 0x3FFFFFFF;
+       cic.LUN_info.LogDev.Mode = 0x01; /* logical volume addressing */
+       cic.Request.CDBLen = 6;  /* need to try just 2 bytes here */
+       cic.Request.Type.Type =  TYPE_CMD; // It is a command.
+       cic.Request.Type.Attribute = ATTR_SIMPLE;
+       cic.Request.Type.Direction = XFER_NONE;
+       cic.Request.Timeout = 0;
+
+       cic.Request.CDB[0] = 0;
+       cic.Request.CDB[1] = 0;
+       cic.Request.CDB[2] = 0;
+       cic.Request.CDB[3] = 0;
+       cic.Request.CDB[4] = 0;
+       cic.Request.CDB[5] = 0;
+
+       rc = ioctl(c->fd, CCISS_PASSTHRU, &cic);
+       if (rc < 0) {
+               fprintf(stderr, "cciss TUR  failed: %s\n",
+                       strerror(errno));
+               MSG(c,MSG_CCISS_TUR_DOWN);
+               ret = PATH_DOWN;
+               goto out;
+       }
+
+       if ((cic.error_info.CommandStatus | cic.error_info.ScsiStatus )) {
+               MSG(c,MSG_CCISS_TUR_DOWN);
+               ret = PATH_DOWN;
+               goto out;
+       }
+
+       MSG(c,MSG_CCISS_TUR_UP);
+
+       ret = PATH_UP;
+out:
+       /*
+        * caller told us he doesn't want to keep the context :
+        * free it
+        */
+       if (!c->context)
+               free(ctxt);
+
+       return(ret);
+}