From: "Ewan D. Milne" <emi...@redhat.com>
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 <emi...@redhat.com>
---
drivers/scsi/scsi_debug.c | 138 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 138 insertions(+)
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 182d5a5..1d8c2bb 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -230,6 +230,7 @@ struct sdebug_dev_info {
char reset;
char stopped;
char used;
+ char sense_pending;
};
struct sdebug_host_info {
@@ -3050,10 +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;
@@ -3100,12 +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;
@@ -3206,6 +3240,89 @@ static ssize_t sdebug_map_show(struct device_driver
*ddp, char *buf)
DRIVER_ATTR(map, S_IRUGO, sdebug_map_show, NULL);
+#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) &&
+ scsi_debug_dsense) {
+ 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,
+ 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
@@ -3239,11 +3356,27 @@ static int do_create_driverfs_files(void)
ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_guard);
ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ato);
ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_map);
+#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_map);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ato);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_guard);
@@ -3926,6 +4059,11 @@ write:
errsts = check_condition_result;
break;
}
+ if (!errsts && devip->sense_pending && (*cmd != INQUIRY) &&
+ (*cmd != REPORT_LUNS)) {
+ devip->sense_pending = 0;
+ errsts = check_condition_result;
+ }
return schedule_resp(SCpnt, devip, done, errsts,
(delay_override ? 0 : scsi_debug_delay));
}
--
1.7.11.7
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