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Subjectcciss update for 2.4.22-rc2 [1 of 2]
Trying a different mailer this time.
This patch was built & tested against 2.4.22-rc2. I can't get to kernel.org this morning to see if rc3 is available.
This patch enables multi-path failover support for cciss 2.4.47 when used in conjunction with the md driver.
The patch does 3 things to provide this support:
1. Sends a no-op command down to the controller. The no-op is _guaranteed_ by firmware to return within a few seconds (about 5). If the command doesn't return in this time we assumed the controller has failed and we fail all commands and let md handle the actual failover. This covers most failure scenarios.
2. Just to be paranoid we've added the ability to extend the amount of time in which the no-op can return. May be useful on heavily loaded systems.
3. Monitors the heartbeat register on the controller for the special case of a PCI master abort. In this case we cannot even submit the no-op command so it will never timeout.

This patch is the same as the original patch except the declaration of the heartbeat_timer variable has been moved to cleanup a compiler warning if the heartbeat monitor thread is not enabled.

--------------------------------------------------------------------------------


diff -burN lx2422rc2.orig/Documentation/cciss.txt lx2422rc2-detect/Documentation/cciss.txt
--- lx2422rc2.orig/Documentation/cciss.txt 2003-08-12 13:22:22.000000000 -0500
+++ lx2422rc2-detect/Documentation/cciss.txt 2003-08-12 13:37:02.000000000 -0500
@@ -127,3 +127,55 @@
access these devices too, as if the array controller were merely a SCSI
controller in the same way that we are allowing it to access SCSI tape drives.

+Monitor Threads
+---------------
+
+For multipath configurations (acheived via a higher level driver, such
+as the "md" driver) it is important that failure of a controller is detected.
+Ordinarily, the driver is entirely interrupt driven. If a failure occurs
+in such a way that the processor cannot receive interrupts from an adapter,
+the driver will wait forever for i/o's to complete. In a multipath
+configuration this is undesirable, as the md driver relies on i/o's being
+reported as failed by the low level driver to trigger failing over to an
+alternate controller. The monitor threads allow the driver to detect such
+situations and report outstanding i/o's as having failed so that recovery
+actions such switching to an alternate controller can occur. The monitor
+threads periodically sends a trivial "no-operation" command down to
+the controllers and expect them to complete within a a reasonable (short)
+time period. The firmware on the adapter is designed such that no matter
+how busy the adapter is serving i/o, it can respond quickly to a
+"no-operation" command. In the event that a deadline elapses before a no
+operation command completes, all outstanding commands on that controller
+are reported back to the upper layers as having failed, and any new commands
+sent to the controller are immediately reported back as failed.
+
+To enable the monitor threads, the compile time option must be enabled
+(via the usual linux kernel configuration) and the monitor thread must
+be enabled at runtime as well. A system may have many adapters, but
+perhaps only a single pair operating in a multipath configuration.
+In this way, it is possible to run monitoring threads only for those
+adapters which require it.
+
+To start a monitoring thread on the first cciss adapter, "cciss0" with
+a polling interval of 30 seconds, execute the following command:
+
+ echo "monitor 30" > /proc/driver/cciss/cciss0
+
+To change the polling interval, to say, 60 seconds:
+
+ echo "monitor 60" > /proc/driver/cciss/cciss0
+
+(Note, the change will not take effect until the previous polling
+interval elapses.)
+
+To disable the monitoring thread, set the polling interval to 0 seconds:
+
+ echo "monitor 0" > /proc/driver/cciss/cciss0
+
+(Again, the monitoring thread will not exit until the previous polling
+interval elapses.)
+
+The minimum monitoring period is 10 seconds, and the maximum monitoring
+period is 3600 seconds (1 hour). The no-operation command must complete
+with 5 seconds of submission in all cases or the controller will be presumed
+failed.
diff -burN lx2422rc2.orig/Documentation/Configure.help lx2422rc2-detect/Documentation/Configure.help
--- lx2422rc2.orig/Documentation/Configure.help 2003-08-12 13:22:22.000000000 -0500
+++ lx2422rc2-detect/Documentation/Configure.help 2003-08-12 13:37:02.000000000 -0500
@@ -6813,7 +6813,7 @@
CONFIG_CISS_SCSI_TAPE
When enabled (Y), this option allows SCSI tape drives and SCSI medium
changers (tape robots) to be accessed via a Compaq 5xxx array
- controller. (See Documentation/cciss.txt for more details.)
+ controller. (See <file:Documentation/cciss.txt> for more details.)

"SCSI support" and "SCSI tape support" must also be enabled for this
option to work.
@@ -6821,6 +6821,15 @@
When this option is disabled (N), the SCSI portion of the driver
is not compiled.

+Enable monitor thread
+CONFIG_CISS_MONITOR_THREAD
+ Intended for use with multipath configurations (see the md driver).
+ This option allows a per-adapter monitoring thread to periodically
+ poll the adapter to detect failure modes in which the processor
+ is unable to receive interrupts from the adapter, thus enabling
+ fail-over to an alternate adapter in such situations. See
+ <file:Documentation/cciss.txt> for more details.
+
QuickNet Internet LineJack/PhoneJack support
CONFIG_PHONE_IXJ
Say M if you have a telephony card manufactured by Quicknet
diff -burN lx2422rc2.orig/drivers/block/cciss.c lx2422rc2-detect/drivers/block/cciss.c
--- lx2422rc2.orig/drivers/block/cciss.c 2003-08-12 13:22:26.000000000 -0500
+++ lx2422rc2-detect/drivers/block/cciss.c 2003-08-12 13:38:55.000000000 -0500
@@ -38,6 +38,7 @@
#include <linux/spinlock.h>
#include <asm/uaccess.h>
#include <asm/io.h>
+#include <linux/smp_lock.h>

#include <linux/blk.h>
#include <linux/blkdev.h>
@@ -109,6 +110,16 @@

#define CCISS_DMA_MASK 0xFFFFFFFFFFFFFFFF /* 64 bit DMA */

+#ifdef CONFIG_CISS_MONITOR_THREAD
+static int cciss_monitor(void *ctlr);
+static int start_monitor_thread(ctlr_info_t *h, unsigned char *cmd,
+ unsigned long count, int (*cciss_monitor)(void *), int *rc);
+static u32 heartbeat_timer = 0;
+#else
+#define cciss_monitor(x)
+#define kill_monitor_thead(x)
+#endif
+
static ctlr_info_t *hba[MAX_CTLR];

static struct proc_dir_entry *proc_cciss;
@@ -188,7 +199,11 @@
"Current # commands on controller: %d\n"
"Max Q depth since init: %d\n"
"Max # commands on controller since init: %d\n"
- "Max SG entries since init: %d\n\n",
+ "Max SG entries since init: %d\n"
+ MONITOR_PERIOD_PATTERN
+ MONITOR_DEADLINE_PATTERN
+ MONITOR_STATUS_PATTERN
+ "\n",
h->devname,
h->product_name,
(unsigned long)h->board_id,
@@ -196,7 +211,10 @@
(unsigned int)h->intr,
h->num_luns,
h->Qdepth, h->commands_outstanding,
- h->maxQsinceinit, h->max_outstanding, h->maxSG);
+ h->maxQsinceinit, h->max_outstanding, h->maxSG,
+ MONITOR_PERIOD_VALUE(h),
+ MONITOR_DEADLINE_VALUE(h),
+ CTLR_STATUS(h));

pos += size; len += size;
cciss_proc_tape_report(ctlr, buffer, &pos, &len);
@@ -231,10 +249,8 @@
{
unsigned char cmd[80];
int len;
-#ifdef CONFIG_CISS_SCSI_TAPE
ctlr_info_t *h = (ctlr_info_t *) data;
int rc;
-#endif

if (count > sizeof(cmd)-1)
return -EINVAL;
@@ -244,6 +260,7 @@
len = strlen(cmd);
if (cmd[len-1] == '\n')
cmd[--len] = '\0';
+
# ifdef CONFIG_CISS_SCSI_TAPE
if (strcmp("engage scsi", cmd)==0) {
rc = cciss_engage_scsi(h->ctlr);
@@ -254,6 +271,10 @@
/* might be nice to have "disengage" too, but it's not
safely possible. (only 1 module use count, lock issues.) */
# endif
+
+ if (START_MONITOR_THREAD(h, cmd, count, cciss_monitor, &rc) == 0)
+ return rc;
+
return -EINVAL;
}

@@ -407,7 +428,7 @@
printk(KERN_DEBUG "cciss_open %x (%x:%x)\n", inode->i_rdev, ctlr, dsk);
#endif /* CCISS_DEBUG */

- if (ctlr > MAX_CTLR || hba[ctlr] == NULL)
+ if (ctlr > MAX_CTLR || hba[ctlr] == NULL || !CTLR_IS_ALIVE(hba[ctlr]))
return -ENXIO;
/*
* Root is allowed to open raw volume zero even if its not configured
@@ -1107,7 +1128,8 @@
size_t size,
unsigned int use_unit_num,
unsigned int log_unit,
- __u8 page_code )
+ __u8 page_code,
+ __u8 cmdtype)
{
ctlr_info_t *h = hba[ctlr];
CommandList_struct *c;
@@ -1131,6 +1153,9 @@
}
c->Header.Tag.lower = c->busaddr; /* tag is phys addr of cmd */
/* Fill in Request block */
+ c->Request.CDB[0] = cmd;
+ c->Request.Type.Type = cmdtype;
+ if (cmdtype == TYPE_CMD) {
switch (cmd) {
case CISS_INQUIRY:
/* If the logical unit number is 0 then, this is going
@@ -1150,11 +1175,9 @@
c->Request.CDB[2] = page_code;
}
c->Request.CDBLen = 6;
- c->Request.Type.Type = TYPE_CMD;
c->Request.Type.Attribute = ATTR_SIMPLE;
c->Request.Type.Direction = XFER_READ; /* Read */
c->Request.Timeout = 0; /* Don't time out */
- c->Request.CDB[0] = CISS_INQUIRY;
c->Request.CDB[4] = size & 0xFF;
break;
case CISS_REPORT_LOG:
@@ -1163,11 +1186,9 @@
So we have nothing to write.
*/
c->Request.CDBLen = 12;
- c->Request.Type.Type = TYPE_CMD;
c->Request.Type.Attribute = ATTR_SIMPLE;
c->Request.Type.Direction = XFER_READ; /* Read */
c->Request.Timeout = 0; /* Don't time out */
- c->Request.CDB[0] = CISS_REPORT_LOG;
c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
c->Request.CDB[7] = (size >> 16) & 0xFF;
c->Request.CDB[8] = (size >> 8) & 0xFF;
@@ -1178,18 +1199,38 @@
hba[ctlr]->drv[log_unit].LunID;
c->Header.LUN.LogDev.Mode = 1;
c->Request.CDBLen = 10;
- c->Request.Type.Type = TYPE_CMD; /* It is a command. */
c->Request.Type.Attribute = ATTR_SIMPLE;
c->Request.Type.Direction = XFER_READ; /* Read */
c->Request.Timeout = 0; /* Don't time out */
- c->Request.CDB[0] = CCISS_READ_CAPACITY;
break;
default:
printk(KERN_WARNING
"cciss: Unknown Command 0x%x sent attempted\n", cmd);
cmd_free(h, c, 1);
return IO_ERROR;
- };
+ }
+ } else if (cmdtype == TYPE_MSG) {
+ switch (cmd) {
+ case 3: /* No-Op message */
+ c->Request.CDBLen = 1;
+ c->Request.Type.Attribute = ATTR_SIMPLE;
+ c->Request.Type.Direction = XFER_WRITE;
+ c->Request.Timeout = 0;
+ c->Request.CDB[0] = cmd;
+ break;
+ default:
+ printk(KERN_WARNING
+ "cciss%d: unknown message type %d\n",
+ ctlr, cmd);
+ cmd_free(h, c, 1);
+ return IO_ERROR;
+ }
+ } else {
+ printk(KERN_WARNING
+ "cciss%d: unknown command type %d\n", ctlr, cmdtype);
+ cmd_free(h, c, 1);
+ return IO_ERROR;
+ }

/* Fill in the scatter gather information */
if (size > 0) {
@@ -1352,7 +1393,7 @@
}

return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
- sizeof(ReportLunData_struct), 0, 0, 0 );
+ sizeof(ReportLunData_struct), 0, 0, 0, TYPE_CMD);

if (return_code == IO_OK) {
listlength = be32_to_cpu(*((__u32 *) &ld_buff->LUNListLength[0]));
@@ -1451,7 +1492,7 @@
memset(size_buff, 0, sizeof(ReadCapdata_struct));
return_code = sendcmd_withirq(CCISS_READ_CAPACITY, ctlr,
size_buff, sizeof(ReadCapdata_struct), 1,
- logvol, 0 );
+ logvol, 0, TYPE_CMD);
if (return_code == IO_OK) {
total_size = (0xff &
(unsigned int) size_buff->total_size[0]) << 24;
@@ -1482,7 +1523,7 @@
/* Execute the command to read the disk geometry */
memset(inq_buff, 0, sizeof(InquiryData_struct));
return_code = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buff,
- sizeof(InquiryData_struct), 1, logvol ,0xC1 );
+ sizeof(InquiryData_struct), 1, logvol ,0xC1, TYPE_CMD);
if (return_code == IO_OK) {
if (inq_buff->data_byte[8] == 0xFF) {
printk(KERN_WARNING
@@ -1590,7 +1631,8 @@
}
memset(size_buff, 0, sizeof(ReadCapdata_struct));
return_code = sendcmd_withirq(CCISS_READ_CAPACITY, ctlr, size_buff,
- sizeof( ReadCapdata_struct), 1, logvol, 0 );
+ sizeof( ReadCapdata_struct), 1, logvol, 0,
+ TYPE_CMD);
if (return_code == IO_OK) {
total_size = (0xff &
(unsigned int)(size_buff->total_size[0])) << 24;
@@ -1619,7 +1661,7 @@
/* Execute the command to read the disk geometry */
memset(inq_buff, 0, sizeof(InquiryData_struct));
return_code = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buff,
- sizeof(InquiryData_struct), 1, logvol ,0xC1 );
+ sizeof(InquiryData_struct), 1, logvol ,0xC1, TYPE_CMD);
if (return_code == IO_OK) {
if (inq_buff->data_byte[8] == 0xFF) {
printk(KERN_WARNING "cciss: reading geometry failed, "
@@ -2236,6 +2278,15 @@
goto startio;
}

+ /* make sure controller is alive. */
+ if (!CTLR_IS_ALIVE(h)) {
+ printk(KERN_WARNING "cciss%d: I/O quit ", h->ctlr);
+ blkdev_dequeue_request(creq);
+ complete_buffers(creq->bh, 0);
+ end_that_request_last(creq);
+ return;
+ }
+
if (( c = cmd_alloc(h, 1)) == NULL)
goto startio;

@@ -2833,7 +2884,174 @@
kfree(hba[i]);
hba[i]=NULL;
}
+#ifdef CONFIG_CISS_MONITOR_THREAD
+static void fail_all_cmds(unsigned long ctlr)
+{
+ /* If we get here, the board is apparently dead. */
+ ctlr_info_t *h = hba[ctlr];
+ CommandList_struct *c;
+ unsigned long flags;
+
+ printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
+ h->alive = 0; /* the controller apparently died... */
+
+ spin_lock_irqsave(&io_request_lock, flags);
+
+ pci_disable_device(h->pdev); /* Make sure it is really dead. */
+
+ /* move everything off the request queue onto the completed queue */
+ while( (c = h->reqQ) != NULL ) {
+ removeQ(&(h->reqQ), c);
+ h->Qdepth--;
+ addQ (&(h->cmpQ), c);
+ }
+
+ /* Now, fail everything on the completed queue with a HW error */
+ while( (c = h->cmpQ) != NULL ) {
+ removeQ(&h->cmpQ, c);
+ c->err_info->CommandStatus = CMD_HARDWARE_ERR;
+ if (c->cmd_type == CMD_RWREQ) {
+ complete_command(h, c, 0);
+ } else if (c->cmd_type == CMD_IOCTL_PEND)
+ complete(c->waiting);
+# ifdef CONFIG_CISS_SCSI_TAPE
+ else if (c->cmd_type == CMD_SCSI)
+ complete_scsi_command(c, 0, 0);
+# endif
+ }
+ spin_unlock_irqrestore(&io_request_lock, flags);
+ return;
+}
+static int cciss_monitor(void *ctlr)
+{
+ /* If the board fails, we ought to detect that. So we periodically
+ send down a No-Op message and expect it to complete quickly. If it
+ doesn't, then we assume the board is dead, and fail all commands.
+ This is useful mostly in a multipath configuration, so that failover
+ will happen. */
+
+ int rc;
+ ctlr_info_t *h = (ctlr_info_t *) ctlr;
+ unsigned long flags;
+ u32 current_timer;
+
+ daemonize();
+ exit_files(current);
+ reparent_to_init();
+
+ printk("cciss%d: Monitor thread starting.\n", h->ctlr);
+
+ /* only listen to signals if the HA was loaded as a module. */
+#define SHUTDOWN_SIGS (sigmask(SIGKILL)|sigmask(SIGINT)|sigmask(SIGTERM))
+ siginitsetinv(&current->blocked, SHUTDOWN_SIGS);
+ sprintf(current->comm, "ccissmon%d", h->ctlr);
+ h->monitor_thread = current;
+
+ init_timer(&h->watchdog);
+ h->watchdog.function = fail_all_cmds;
+ h->watchdog.data = (unsigned long) h->ctlr;
+ while (1) {
+ /* check heartbeat timer */
+ current_timer = readl(&h->cfgtable->HeartBeat);
+ current_timer &= 0x0fffffff;
+ if (heartbeat_timer == current_timer) {
+ fail_all_cmds(h->ctlr);
+ break;
+ }
+ else
+ heartbeat_timer = current_timer;
+
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule_timeout(h->monitor_period * HZ);
+ h->watchdog.expires = jiffies + HZ * h->monitor_deadline;
+ add_timer(&h->watchdog);
+ /* send down a trivial command (no op message) to ctlr */
+ rc = sendcmd_withirq(3, h->ctlr, NULL, 0, 0, 0, 0, TYPE_MSG);
+ del_timer(&h->watchdog);
+ if (!CTLR_IS_ALIVE(h))
+ break;
+ if (signal_pending(current)) {
+ printk(KERN_WARNING "%s received signal.\n",
+ current->comm);
+ break;
+ }
+ if (h->monitor_period == 0) /* zero period means exit thread */
+ break;
+ }
+ printk(KERN_INFO "%s exiting.\n", current->comm);
+ spin_lock_irqsave(&io_request_lock, flags);
+ h->monitor_started = 0;
+ h->monitor_thread = NULL;
+ spin_unlock_irqrestore(&io_request_lock, flags);
+ return 0;
+}
+static int start_monitor_thread(ctlr_info_t *h, unsigned char *cmd,
+ unsigned long count, int (*cciss_monitor)(void *), int *rc)
+{
+ unsigned long flags;
+ unsigned int new_period, old_period, new_deadline, old_deadline;
+
+ if (strncmp("monitor", cmd, 7) == 0) {
+ new_period = simple_strtol(cmd + 8, NULL, 10);
+ spin_lock_irqsave(&io_request_lock, flags);
+ new_deadline = h->monitor_deadline;
+ spin_unlock_irqrestore(&io_request_lock, flags);
+ } else if (strncmp("deadline", cmd, 8) == 0) {
+ new_deadline = simple_strtol(cmd + 9, NULL, 10);
+ spin_lock_irqsave(&io_request_lock, flags);
+ new_period = h->monitor_period;
+ spin_unlock_irqrestore(&io_request_lock, flags);
+ } else
+ return -1;
+ if (new_period != 0 && new_period < CCISS_MIN_PERIOD)
+ new_period = CCISS_MIN_PERIOD;
+ if (new_period > CCISS_MAX_PERIOD)
+ new_period = CCISS_MAX_PERIOD;
+ if (new_deadline >= new_period) {
+ new_deadline = new_period - 5;
+ printk(KERN_INFO "setting deadline to %d\n", new_deadline);
+ }
+ spin_lock_irqsave(&io_request_lock, flags);
+ if (h->monitor_started != 0) {
+ old_period = h->monitor_period;
+ old_deadline = h->monitor_deadline;
+ h->monitor_period = new_period;
+ h->monitor_deadline = new_deadline;
+ spin_unlock_irqrestore(&io_request_lock, flags);
+ if (new_period == 0) {
+ printk(KERN_INFO "cciss%d: stopping monitor thread\n",
+ h->ctlr);
+ *rc = count;
+ return 0;
+ }
+ if (new_period != old_period)
+ printk(KERN_INFO "cciss%d: adjusting monitor thread "
+ "period from %d to %d seconds\n",
+ h->ctlr, old_period, new_period);
+ if (new_deadline != old_deadline)
+ printk(KERN_INFO "cciss%d: adjusting monitor thread "
+ "deadline from %d to %d seconds\n",
+ h->ctlr, old_deadline, new_deadline);
+ *rc = count;
+ return 0;
+ }
+ h->monitor_started = 1;
+ h->monitor_period = new_period;
+ h->monitor_deadline = new_deadline;
+ spin_unlock_irqrestore(&io_request_lock, flags);
+ kernel_thread(cciss_monitor, h, 0);
+ *rc = count;
+ return 0;
+}

+static void kill_monitor_thread(ctlr_info_t *h)
+{
+ if (h->monitor_thread)
+ send_sig(SIGKILL, h->monitor_thread, 1);
+}
+#else
+#define kill_monitor_thread(h)
+#endif
/*
* This is it. Find all the controllers and register them. I really hate
* stealing all these major device numbers.
@@ -2861,6 +3079,7 @@
sprintf(hba[i]->devname, "cciss%d", i);
hba[i]->ctlr = i;
hba[i]->pdev = pdev;
+ ASSERT_CTLR_ALIVE(hba[i]);

if (register_blkdev(MAJOR_NR+i, hba[i]->devname, &cciss_fops)) {
printk(KERN_ERR "cciss: Unable to get major number "
@@ -2993,14 +3212,17 @@
"already be removed \n");
return;
}
- /* Turn board interrupts off and send the flush cache command */
- /* sendcmd will turn off interrupt, and send the flush...
- * To write all data in the battery backed cache to disks */
+ kill_monitor_thread(hba[i]);
+ /* no sense in trying to flush a dead board's cache. */
+ if (CTLR_IS_ALIVE(hba[i])) {
+ /* Turn board interrupts off and flush the cache */
+ /* write all data in the battery backed cache to disks */
memset(flush_buf, 0, 4);
- return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4,0,0,0, NULL);
- if (return_code != IO_OK) {
+ return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf,
+ 4, 0, 0, 0, NULL);
+ if (return_code != IO_OK)
printk(KERN_WARNING
- "Error Flushing cache on controller %d\n", i);
+ "cciss%d: Error flushing cache\n", i);
}
free_irq(hba[i]->intr, hba[i]);
pci_set_drvdata(pdev, NULL);
diff -burN lx2422rc2.orig/drivers/block/cciss.h lx2422rc2-detect/drivers/block/cciss.h
--- lx2422rc2.orig/drivers/block/cciss.h 2003-08-12 13:22:26.000000000 -0500
+++ lx2422rc2-detect/drivers/block/cciss.h 2003-08-12 13:37:02.000000000 -0500
@@ -91,6 +91,40 @@
#ifdef CONFIG_CISS_SCSI_TAPE
void *scsi_ctlr; /* ptr to structure containing scsi related stuff */
#endif
+#ifdef CONFIG_CISS_MONITOR_THREAD
+ struct timer_list watchdog;
+ struct task_struct *monitor_thread;
+ unsigned int monitor_period;
+ unsigned int monitor_deadline;
+ unsigned char alive;
+ unsigned char monitor_started;
+#define CCISS_MIN_PERIOD 10
+#define CCISS_MAX_PERIOD 3600
+#define CTLR_IS_ALIVE(h) (h->alive)
+#define ASSERT_CTLR_ALIVE(h) { h->alive = 1; \
+ h->monitor_period = 0; \
+ h->monitor_started = 0; }
+#define MONITOR_STATUS_PATTERN "Status: %s\n"
+#define CTLR_STATUS(h) CTLR_IS_ALIVE(h) ? "operational" : "failed"
+#define MONITOR_PERIOD_PATTERN "Monitor thread period: %d\n"
+#define MONITOR_PERIOD_VALUE(h) (h->monitor_period)
+#define MONITOR_DEADLINE_PATTERN "Monitor thread deadline: %d\n"
+#define MONITOR_DEADLINE_VALUE(h) (h->monitor_deadline)
+#define START_MONITOR_THREAD(h, cmd, count, cciss_monitor, rc) \
+ start_monitor_thread(h, cmd, count, cciss_monitor, rc)
+#else
+
+#define MONITOR_PERIOD_PATTERN "%s"
+#define MONITOR_PERIOD_VALUE(h) ""
+#define MONITOR_DEADLINE_PATTERN "%s"
+#define MONITOR_DEADLINE_VALUE(h) ""
+#define MONITOR_STATUS_PATTERN "%s\n"
+#define CTLR_STATUS(h) ""
+#define CTLR_IS_ALIVE(h) (1)
+#define ASSERT_CTLR_ALIVE(h)
+#define START_MONITOR_THREAD(a,b,c,d,rc) (*rc == 0)
+
+#endif
};

/* Defining the diffent access_menthods */
diff -burN lx2422rc2.orig/drivers/block/Config.in lx2422rc2-detect/drivers/block/Config.in
--- lx2422rc2.orig/drivers/block/Config.in 2002-11-28 17:53:12.000000000 -0600
+++ lx2422rc2-detect/drivers/block/Config.in 2003-08-12 13:37:02.000000000 -0500
@@ -36,6 +36,7 @@
dep_tristate 'Compaq SMART2 support' CONFIG_BLK_CPQ_DA $CONFIG_PCI
dep_tristate 'Compaq Smart Array 5xxx support' CONFIG_BLK_CPQ_CISS_DA $CONFIG_PCI
dep_mbool ' SCSI tape drive support for Smart Array 5xxx' CONFIG_CISS_SCSI_TAPE $CONFIG_BLK_CPQ_CISS_DA $CONFIG_SCSI
+dep_mbool ' Enable monitor thread' CONFIG_CISS_MONITOR_THREAD $CONFIG_BLK_CPQ_CISS_DA
dep_tristate 'Mylex DAC960/DAC1100 PCI RAID Controller support' CONFIG_BLK_DEV_DAC960 $CONFIG_PCI
dep_tristate 'Micro Memory MM5415 Battery Backed RAM support (EXPERIMENTAL)' CONFIG_BLK_DEV_UMEM $CONFIG_PCI $CONFIG_EXPERIMENTAL

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