From: "Ewan D. Milne" <emilne@xxxxxxxxxx>
Added capability to scsi_debug to generate sense and Unit Attention
conditions to exercise the enhanced sense and Unit Attention handling.
Signed-off-by: Ewan D. Milne <emilne@xxxxxxxxxx>
---
drivers/scsi/scsi_debug.c | 133 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 133 insertions(+)
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 88f6d16..8fe9bcd 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -3051,10 +3051,27 @@ static ssize_t sdebug_max_luns_store(struct device_driver * ddp,
const char * buf, size_t count)
{
int n;
+#ifdef CONFIG_SCSI_ENHANCED_UA
+ struct sdebug_host_info *sdbg_host;
+ struct sdebug_dev_info *devip;
+#endif
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
scsi_debug_max_luns = n;
sdebug_max_tgts_luns();
+
+#ifdef CONFIG_SCSI_ENHANCED_UA
+ spin_lock(&sdebug_host_list_lock);
+ list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
+ list_for_each_entry(devip, &sdbg_host->dev_info_list,
+ dev_list) {
+ mk_sense_buffer(devip, UNIT_ATTENTION,
+ 0x3f, 0x0e);
+ devip->sense_pending = 1;
+ }
+ }
+ spin_unlock(&sdebug_host_list_lock);
+#endif
return count;
}
return -EINVAL;
@@ -3101,12 +3118,28 @@ static ssize_t sdebug_virtual_gb_store(struct device_driver * ddp,
const char * buf, size_t count)
{
int n;
+#ifdef CONFIG_SCSI_ENHANCED_UA
+ struct sdebug_host_info *sdbg_host;
+ struct sdebug_dev_info *devip;
+#endif
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
scsi_debug_virtual_gb = n;
sdebug_capacity = get_sdebug_capacity();
+#ifdef CONFIG_SCSI_ENHANCED_UA
+ spin_lock(&sdebug_host_list_lock);
+ list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
+ list_for_each_entry(devip, &sdbg_host->dev_info_list,
+ dev_list) {
+ mk_sense_buffer(devip, UNIT_ATTENTION,
+ 0x2a, 0x09);
+ devip->sense_pending = 1;
+ }
+ }
+ spin_unlock(&sdebug_host_list_lock);
+#endif
return count;
}
return -EINVAL;
@@ -3233,6 +3266,90 @@ static ssize_t sdebug_sense_overflow_store(struct device_driver *ddp,
}
DRIVER_ATTR(sense_overflow, S_IWUSR, NULL, sdebug_sense_overflow_store);
+#ifdef CONFIG_SCSI_ENHANCED_UA
+static ssize_t sdebug_ua_overflow_store(struct device_driver *ddp,
+ const char *buf, size_t count)
+{
+ int n;
+ struct sdebug_host_info *sdbg_host;
+ struct sdebug_dev_info *devip;
+
+ if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
+ spin_lock(&sdebug_host_list_lock);
+ list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
+ list_for_each_entry(devip, &sdbg_host->dev_info_list,
+ dev_list) {
+ if (scsi_debug_dsense) {
+ mk_sense_buffer(devip, UNIT_ATTENTION,
+ 0, 0);
+ devip->sense_buff[7] = 8;
+ devip->sense_buff[8] = 0x02;
+ devip->sense_buff[9] = 0x06;
+ devip->sense_buff[12] = 0x01;
+ }
+ devip->sense_pending = 1;
+ }
+ }
+ spin_unlock(&sdebug_host_list_lock);
+ return count;
+ }
+ return -EINVAL;
+}
+DRIVER_ATTR(ua_overflow, S_IWUSR, NULL, sdebug_ua_overflow_store);
+
+static ssize_t sdebug_soft_threshold_reached_store(struct device_driver *ddp,
+ const char *buf,
+ size_t count)
+{
+ int n;
+ struct sdebug_host_info *sdbg_host;
+ struct sdebug_dev_info *devip;
+
+ if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
+ spin_lock(&sdebug_host_list_lock);
+ list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
+ list_for_each_entry(devip, &sdbg_host->dev_info_list,
+ dev_list) {
+ mk_sense_buffer(devip, UNIT_ATTENTION,
+ 0x38, 0x07);
+ devip->sense_pending = 1;
+ }
+ }
+ spin_unlock(&sdebug_host_list_lock);
+ return count;
+ }
+ return -EINVAL;
+}
+DRIVER_ATTR(soft_threshold_reached, S_IWUSR, NULL,
+ sdebug_soft_threshold_reached_store);
+
+static ssize_t sdebug_mode_parameters_changed_store(struct device_driver *ddp,
+ const char *buf,
+ size_t count)
+{
+ int n;
+ struct sdebug_host_info *sdbg_host;
+ struct sdebug_dev_info *devip;
+
+ if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
+ spin_lock(&sdebug_host_list_lock);
+ list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
+ list_for_each_entry(devip, &sdbg_host->dev_info_list,
+ dev_list) {
+ mk_sense_buffer(devip, UNIT_ATTENTION,
+ 0x2a, 0x01);
+ devip->sense_pending = 1;
+ }
+ }
+ spin_unlock(&sdebug_host_list_lock);
+ return count;
+ }
+ return -EINVAL;
+}
+DRIVER_ATTR(mode_parameters_changed, S_IWUSR, NULL,
+ sdebug_mode_parameters_changed_store);
+#endif
+
/* Note: The following function creates attribute files in the
/sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
files (over those found in the /sys/module/scsi_debug/parameters
@@ -3268,11 +3385,27 @@ static int do_create_driverfs_files(void)
ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_map);
ret |= driver_create_file(&sdebug_driverfs_driver,
&driver_attr_sense_overflow);
+#ifdef CONFIG_SCSI_ENHANCED_UA
+ ret |= driver_create_file(&sdebug_driverfs_driver,
+ &driver_attr_ua_overflow);
+ ret |= driver_create_file(&sdebug_driverfs_driver,
+ &driver_attr_soft_threshold_reached);
+ ret |= driver_create_file(&sdebug_driverfs_driver,
+ &driver_attr_mode_parameters_changed);
+#endif
return ret;
}
static void do_remove_driverfs_files(void)
{
+#ifdef CONFIG_SCSI_ENHANCED_UA
+ driver_remove_file(&sdebug_driverfs_driver,
+ &driver_attr_mode_parameters_changed);
+ driver_remove_file(&sdebug_driverfs_driver,
+ &driver_attr_soft_threshold_reached);
+ driver_remove_file(&sdebug_driverfs_driver,
+ &driver_attr_ua_overflow);
+#endif
driver_remove_file(&sdebug_driverfs_driver,
&driver_attr_sense_overflow);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_map);
