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path: root/drivers/scsi/device_handler/scsi_dh_rdac.c
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Diffstat (limited to 'drivers/scsi/device_handler/scsi_dh_rdac.c')
-rw-r--r--drivers/scsi/device_handler/scsi_dh_rdac.c116
1 files changed, 92 insertions, 24 deletions
diff --git a/drivers/scsi/device_handler/scsi_dh_rdac.c b/drivers/scsi/device_handler/scsi_dh_rdac.c
index fd0544f7da81..11c89311427e 100644
--- a/drivers/scsi/device_handler/scsi_dh_rdac.c
+++ b/drivers/scsi/device_handler/scsi_dh_rdac.c
@@ -112,6 +112,7 @@ struct c9_inquiry {
#define SUBSYS_ID_LEN 16
#define SLOT_ID_LEN 2
+#define ARRAY_LABEL_LEN 31
struct c4_inquiry {
u8 peripheral_info;
@@ -135,6 +136,8 @@ struct rdac_controller {
struct rdac_pg_legacy legacy;
struct rdac_pg_expanded expanded;
} mode_select;
+ u8 index;
+ u8 array_name[ARRAY_LABEL_LEN];
};
struct c8_inquiry {
u8 peripheral_info;
@@ -198,6 +201,31 @@ static const char *lun_state[] =
static LIST_HEAD(ctlr_list);
static DEFINE_SPINLOCK(list_lock);
+/*
+ * module parameter to enable rdac debug logging.
+ * 2 bits for each type of logging, only two types defined for now
+ * Can be enhanced if required at later point
+ */
+static int rdac_logging = 1;
+module_param(rdac_logging, int, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(rdac_logging, "A bit mask of rdac logging levels, "
+ "Default is 1 - failover logging enabled, "
+ "set it to 0xF to enable all the logs");
+
+#define RDAC_LOG_FAILOVER 0
+#define RDAC_LOG_SENSE 2
+
+#define RDAC_LOG_BITS 2
+
+#define RDAC_LOG_LEVEL(SHIFT) \
+ ((rdac_logging >> (SHIFT)) & ((1 << (RDAC_LOG_BITS)) - 1))
+
+#define RDAC_LOG(SHIFT, sdev, f, arg...) \
+do { \
+ if (unlikely(RDAC_LOG_LEVEL(SHIFT))) \
+ sdev_printk(KERN_INFO, sdev, RDAC_NAME ": " f "\n", ## arg); \
+} while (0);
+
static inline struct rdac_dh_data *get_rdac_data(struct scsi_device *sdev)
{
struct scsi_dh_data *scsi_dh_data = sdev->scsi_dh_data;
@@ -303,7 +331,8 @@ static void release_controller(struct kref *kref)
kfree(ctlr);
}
-static struct rdac_controller *get_controller(u8 *subsys_id, u8 *slot_id)
+static struct rdac_controller *get_controller(u8 *subsys_id, u8 *slot_id,
+ char *array_name)
{
struct rdac_controller *ctlr, *tmp;
@@ -324,6 +353,14 @@ static struct rdac_controller *get_controller(u8 *subsys_id, u8 *slot_id)
/* initialize fields of controller */
memcpy(ctlr->subsys_id, subsys_id, SUBSYS_ID_LEN);
memcpy(ctlr->slot_id, slot_id, SLOT_ID_LEN);
+ memcpy(ctlr->array_name, array_name, ARRAY_LABEL_LEN);
+
+ /* update the controller index */
+ if (slot_id[1] == 0x31)
+ ctlr->index = 0;
+ else
+ ctlr->index = 1;
+
kref_init(&ctlr->kref);
ctlr->use_ms10 = -1;
list_add(&ctlr->node, &ctlr_list);
@@ -363,9 +400,10 @@ done:
return err;
}
-static int get_lun(struct scsi_device *sdev, struct rdac_dh_data *h)
+static int get_lun_info(struct scsi_device *sdev, struct rdac_dh_data *h,
+ char *array_name)
{
- int err;
+ int err, i;
struct c8_inquiry *inqp;
err = submit_inquiry(sdev, 0xC8, sizeof(struct c8_inquiry), h);
@@ -377,6 +415,11 @@ static int get_lun(struct scsi_device *sdev, struct rdac_dh_data *h)
inqp->page_id[2] != 'i' || inqp->page_id[3] != 'd')
return SCSI_DH_NOSYS;
h->lun = inqp->lun[7]; /* Uses only the last byte */
+
+ for(i=0; i<ARRAY_LABEL_LEN-1; ++i)
+ *(array_name+i) = inqp->array_user_label[(2*i)+1];
+
+ *(array_name+ARRAY_LABEL_LEN-1) = '\0';
}
return err;
}
@@ -410,7 +453,7 @@ static int check_ownership(struct scsi_device *sdev, struct rdac_dh_data *h)
}
static int initialize_controller(struct scsi_device *sdev,
- struct rdac_dh_data *h)
+ struct rdac_dh_data *h, char *array_name)
{
int err;
struct c4_inquiry *inqp;
@@ -418,7 +461,8 @@ static int initialize_controller(struct scsi_device *sdev,
err = submit_inquiry(sdev, 0xC4, sizeof(struct c4_inquiry), h);
if (err == SCSI_DH_OK) {
inqp = &h->inq.c4;
- h->ctlr = get_controller(inqp->subsys_id, inqp->slot_id);
+ h->ctlr = get_controller(inqp->subsys_id, inqp->slot_id,
+ array_name);
if (!h->ctlr)
err = SCSI_DH_RES_TEMP_UNAVAIL;
}
@@ -450,6 +494,7 @@ static int mode_select_handle_sense(struct scsi_device *sdev,
{
struct scsi_sense_hdr sense_hdr;
int err = SCSI_DH_IO, ret;
+ struct rdac_dh_data *h = get_rdac_data(sdev);
ret = scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, &sense_hdr);
if (!ret)
@@ -478,11 +523,14 @@ static int mode_select_handle_sense(struct scsi_device *sdev,
err = SCSI_DH_RETRY;
break;
default:
- sdev_printk(KERN_INFO, sdev,
- "MODE_SELECT failed with sense %02x/%02x/%02x.\n",
- sense_hdr.sense_key, sense_hdr.asc, sense_hdr.ascq);
+ break;
}
+ RDAC_LOG(RDAC_LOG_FAILOVER, sdev, "array %s, ctlr %d, "
+ "MODE_SELECT returned with sense %02x/%02x/%02x",
+ (char *) h->ctlr->array_name, h->ctlr->index,
+ sense_hdr.sense_key, sense_hdr.asc, sense_hdr.ascq);
+
done:
return err;
}
@@ -499,7 +547,9 @@ retry:
if (!rq)
goto done;
- sdev_printk(KERN_INFO, sdev, "%s MODE_SELECT command.\n",
+ RDAC_LOG(RDAC_LOG_FAILOVER, sdev, "array %s, ctlr %d, "
+ "%s MODE_SELECT command",
+ (char *) h->ctlr->array_name, h->ctlr->index,
(retry_cnt == RDAC_RETRY_COUNT) ? "queueing" : "retrying");
err = blk_execute_rq(q, NULL, rq, 1);
@@ -509,8 +559,12 @@ retry:
if (err == SCSI_DH_RETRY && retry_cnt--)
goto retry;
}
- if (err == SCSI_DH_OK)
+ if (err == SCSI_DH_OK) {
h->state = RDAC_STATE_ACTIVE;
+ RDAC_LOG(RDAC_LOG_FAILOVER, sdev, "array %s, ctlr %d, "
+ "MODE_SELECT completed",
+ (char *) h->ctlr->array_name, h->ctlr->index);
+ }
done:
return err;
@@ -525,17 +579,6 @@ static int rdac_activate(struct scsi_device *sdev)
if (err != SCSI_DH_OK)
goto done;
- if (!h->ctlr) {
- err = initialize_controller(sdev, h);
- if (err != SCSI_DH_OK)
- goto done;
- }
-
- if (h->ctlr->use_ms10 == -1) {
- err = set_mode_select(sdev, h);
- if (err != SCSI_DH_OK)
- goto done;
- }
if (h->lun_state == RDAC_LUN_UNOWNED)
err = send_mode_select(sdev, h);
done:
@@ -559,6 +602,12 @@ static int rdac_check_sense(struct scsi_device *sdev,
struct scsi_sense_hdr *sense_hdr)
{
struct rdac_dh_data *h = get_rdac_data(sdev);
+
+ RDAC_LOG(RDAC_LOG_SENSE, sdev, "array %s, ctlr %d, "
+ "I/O returned with sense %02x/%02x/%02x",
+ (char *) h->ctlr->array_name, h->ctlr->index,
+ sense_hdr->sense_key, sense_hdr->asc, sense_hdr->ascq);
+
switch (sense_hdr->sense_key) {
case NOT_READY:
if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x01)
@@ -628,11 +677,18 @@ static const struct scsi_dh_devlist rdac_dev_list[] = {
{"SGI", "IS"},
{"STK", "OPENstorage D280"},
{"SUN", "CSM200_R"},
+ {"SUN", "LCSM100_I"},
+ {"SUN", "LCSM100_S"},
+ {"SUN", "LCSM100_E"},
{"SUN", "LCSM100_F"},
{"DELL", "MD3000"},
{"DELL", "MD3000i"},
+ {"DELL", "MD32xx"},
+ {"DELL", "MD32xxi"},
{"LSI", "INF-01-00"},
{"ENGENIO", "INF-01-00"},
+ {"STK", "FLEXLINE 380"},
+ {"SUN", "CSM100_R_FC"},
{NULL, NULL},
};
@@ -656,6 +712,7 @@ static int rdac_bus_attach(struct scsi_device *sdev)
struct rdac_dh_data *h;
unsigned long flags;
int err;
+ char array_name[ARRAY_LABEL_LEN];
scsi_dh_data = kzalloc(sizeof(struct scsi_device_handler *)
+ sizeof(*h) , GFP_KERNEL);
@@ -670,16 +727,24 @@ static int rdac_bus_attach(struct scsi_device *sdev)
h->lun = UNINITIALIZED_LUN;
h->state = RDAC_STATE_ACTIVE;
- err = get_lun(sdev, h);
+ err = get_lun_info(sdev, h, array_name);
if (err != SCSI_DH_OK)
goto failed;
- err = check_ownership(sdev, h);
+ err = initialize_controller(sdev, h, array_name);
if (err != SCSI_DH_OK)
goto failed;
+ err = check_ownership(sdev, h);
+ if (err != SCSI_DH_OK)
+ goto clean_ctlr;
+
+ err = set_mode_select(sdev, h);
+ if (err != SCSI_DH_OK)
+ goto clean_ctlr;
+
if (!try_module_get(THIS_MODULE))
- goto failed;
+ goto clean_ctlr;
spin_lock_irqsave(sdev->request_queue->queue_lock, flags);
sdev->scsi_dh_data = scsi_dh_data;
@@ -691,6 +756,9 @@ static int rdac_bus_attach(struct scsi_device *sdev)
return 0;
+clean_ctlr:
+ kref_put(&h->ctlr->kref, release_controller);
+
failed:
kfree(scsi_dh_data);
sdev_printk(KERN_ERR, sdev, "%s: not attached\n",
generated by cgit v1.2.3 (git 2.0.4) at 2024-07-10 00:18:21 +0000