[SCSI] lpfc 8.2.8 v2 : Add statistical reporting control and additional fc vendor events
Added support for new sysfs attributes: lpfc_stat_data_ctrl and
lpfc_max_scsicmpl_time. The attributes control statistical reporting
of io load.
Added support for new fc vendor events for error reporting.
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index 343b0b3..aa3d627 100644
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -32,6 +32,7 @@
#include "lpfc_hw.h"
#include "lpfc_sli.h"
+#include "lpfc_nl.h"
#include "lpfc_disc.h"
#include "lpfc_scsi.h"
#include "lpfc.h"
@@ -2183,6 +2184,335 @@
static DEVICE_ATTR(lpfc_topology, S_IRUGO | S_IWUSR,
lpfc_topology_show, lpfc_topology_store);
+
+/**
+ * lpfc_stat_data_ctrl_store: write call back for lpfc_stat_data_ctrl
+ * sysfs file.
+ * @dev: Pointer to class device.
+ * @buf: Data buffer.
+ * @count: Size of the data buffer.
+ *
+ * This function get called when an user write to the lpfc_stat_data_ctrl
+ * sysfs file. This function parse the command written to the sysfs file
+ * and take appropriate action. These commands are used for controlling
+ * driver statistical data collection.
+ * Following are the command this function handles.
+ *
+ * setbucket <bucket_type> <base> <step>
+ * = Set the latency buckets.
+ * destroybucket = destroy all the buckets.
+ * start = start data collection
+ * stop = stop data collection
+ * reset = reset the collected data
+ **/
+static ssize_t
+lpfc_stat_data_ctrl_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct Scsi_Host *shost = class_to_shost(dev);
+ struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
+ struct lpfc_hba *phba = vport->phba;
+#define LPFC_MAX_DATA_CTRL_LEN 1024
+ static char bucket_data[LPFC_MAX_DATA_CTRL_LEN];
+ unsigned long i;
+ char *str_ptr, *token;
+ struct lpfc_vport **vports;
+ struct Scsi_Host *v_shost;
+ char *bucket_type_str, *base_str, *step_str;
+ unsigned long base, step, bucket_type;
+
+ if (!strncmp(buf, "setbucket", strlen("setbucket"))) {
+ if (strlen(buf) > LPFC_MAX_DATA_CTRL_LEN)
+ return -EINVAL;
+
+ strcpy(bucket_data, buf);
+ str_ptr = &bucket_data[0];
+ /* Ignore this token - this is command token */
+ token = strsep(&str_ptr, "\t ");
+ if (!token)
+ return -EINVAL;
+
+ bucket_type_str = strsep(&str_ptr, "\t ");
+ if (!bucket_type_str)
+ return -EINVAL;
+
+ if (!strncmp(bucket_type_str, "linear", strlen("linear")))
+ bucket_type = LPFC_LINEAR_BUCKET;
+ else if (!strncmp(bucket_type_str, "power2", strlen("power2")))
+ bucket_type = LPFC_POWER2_BUCKET;
+ else
+ return -EINVAL;
+
+ base_str = strsep(&str_ptr, "\t ");
+ if (!base_str)
+ return -EINVAL;
+ base = simple_strtoul(base_str, NULL, 0);
+
+ step_str = strsep(&str_ptr, "\t ");
+ if (!step_str)
+ return -EINVAL;
+ step = simple_strtoul(step_str, NULL, 0);
+ if (!step)
+ return -EINVAL;
+
+ /* Block the data collection for every vport */
+ vports = lpfc_create_vport_work_array(phba);
+ if (vports == NULL)
+ return -ENOMEM;
+
+ for (i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
+ v_shost = lpfc_shost_from_vport(vports[i]);
+ spin_lock_irq(v_shost->host_lock);
+ /* Block and reset data collection */
+ vports[i]->stat_data_blocked = 1;
+ if (vports[i]->stat_data_enabled)
+ lpfc_vport_reset_stat_data(vports[i]);
+ spin_unlock_irq(v_shost->host_lock);
+ }
+
+ /* Set the bucket attributes */
+ phba->bucket_type = bucket_type;
+ phba->bucket_base = base;
+ phba->bucket_step = step;
+
+ for (i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
+ v_shost = lpfc_shost_from_vport(vports[i]);
+
+ /* Unblock data collection */
+ spin_lock_irq(v_shost->host_lock);
+ vports[i]->stat_data_blocked = 0;
+ spin_unlock_irq(v_shost->host_lock);
+ }
+ lpfc_destroy_vport_work_array(phba, vports);
+ return strlen(buf);
+ }
+
+ if (!strncmp(buf, "destroybucket", strlen("destroybucket"))) {
+ vports = lpfc_create_vport_work_array(phba);
+ if (vports == NULL)
+ return -ENOMEM;
+
+ for (i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
+ v_shost = lpfc_shost_from_vport(vports[i]);
+ spin_lock_irq(shost->host_lock);
+ vports[i]->stat_data_blocked = 1;
+ lpfc_free_bucket(vport);
+ vport->stat_data_enabled = 0;
+ vports[i]->stat_data_blocked = 0;
+ spin_unlock_irq(shost->host_lock);
+ }
+ lpfc_destroy_vport_work_array(phba, vports);
+ phba->bucket_type = LPFC_NO_BUCKET;
+ phba->bucket_base = 0;
+ phba->bucket_step = 0;
+ return strlen(buf);
+ }
+
+ if (!strncmp(buf, "start", strlen("start"))) {
+ /* If no buckets configured return error */
+ if (phba->bucket_type == LPFC_NO_BUCKET)
+ return -EINVAL;
+ spin_lock_irq(shost->host_lock);
+ if (vport->stat_data_enabled) {
+ spin_unlock_irq(shost->host_lock);
+ return strlen(buf);
+ }
+ lpfc_alloc_bucket(vport);
+ vport->stat_data_enabled = 1;
+ spin_unlock_irq(shost->host_lock);
+ return strlen(buf);
+ }
+
+ if (!strncmp(buf, "stop", strlen("stop"))) {
+ spin_lock_irq(shost->host_lock);
+ if (vport->stat_data_enabled == 0) {
+ spin_unlock_irq(shost->host_lock);
+ return strlen(buf);
+ }
+ lpfc_free_bucket(vport);
+ vport->stat_data_enabled = 0;
+ spin_unlock_irq(shost->host_lock);
+ return strlen(buf);
+ }
+
+ if (!strncmp(buf, "reset", strlen("reset"))) {
+ if ((phba->bucket_type == LPFC_NO_BUCKET)
+ || !vport->stat_data_enabled)
+ return strlen(buf);
+ spin_lock_irq(shost->host_lock);
+ vport->stat_data_blocked = 1;
+ lpfc_vport_reset_stat_data(vport);
+ vport->stat_data_blocked = 0;
+ spin_unlock_irq(shost->host_lock);
+ return strlen(buf);
+ }
+ return -EINVAL;
+}
+
+
+/**
+ * lpfc_stat_data_ctrl_show: Read callback function for
+ * lpfc_stat_data_ctrl sysfs file.
+ * @dev: Pointer to class device object.
+ * @buf: Data buffer.
+ *
+ * This function is the read call back function for
+ * lpfc_stat_data_ctrl sysfs file. This function report the
+ * current statistical data collection state.
+ **/
+static ssize_t
+lpfc_stat_data_ctrl_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct Scsi_Host *shost = class_to_shost(dev);
+ struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
+ struct lpfc_hba *phba = vport->phba;
+ int index = 0;
+ int i;
+ char *bucket_type;
+ unsigned long bucket_value;
+
+ switch (phba->bucket_type) {
+ case LPFC_LINEAR_BUCKET:
+ bucket_type = "linear";
+ break;
+ case LPFC_POWER2_BUCKET:
+ bucket_type = "power2";
+ break;
+ default:
+ bucket_type = "No Bucket";
+ break;
+ }
+
+ sprintf(&buf[index], "Statistical Data enabled :%d, "
+ "blocked :%d, Bucket type :%s, Bucket base :%d,"
+ " Bucket step :%d\nLatency Ranges :",
+ vport->stat_data_enabled, vport->stat_data_blocked,
+ bucket_type, phba->bucket_base, phba->bucket_step);
+ index = strlen(buf);
+ if (phba->bucket_type != LPFC_NO_BUCKET) {
+ for (i = 0; i < LPFC_MAX_BUCKET_COUNT; i++) {
+ if (phba->bucket_type == LPFC_LINEAR_BUCKET)
+ bucket_value = phba->bucket_base +
+ phba->bucket_step * i;
+ else
+ bucket_value = phba->bucket_base +
+ (1 << i) * phba->bucket_step;
+
+ if (index + 10 > PAGE_SIZE)
+ break;
+ sprintf(&buf[index], "%08ld ", bucket_value);
+ index = strlen(buf);
+ }
+ }
+ sprintf(&buf[index], "\n");
+ return strlen(buf);
+}
+
+/*
+ * Sysfs attribute to control the statistical data collection.
+ */
+static DEVICE_ATTR(lpfc_stat_data_ctrl, S_IRUGO | S_IWUSR,
+ lpfc_stat_data_ctrl_show, lpfc_stat_data_ctrl_store);
+
+/*
+ * lpfc_drvr_stat_data: sysfs attr to get driver statistical data.
+ */
+
+/*
+ * Each Bucket takes 11 characters and 1 new line + 17 bytes WWN
+ * for each target.
+ */
+#define STAT_DATA_SIZE_PER_TARGET(NUM_BUCKETS) ((NUM_BUCKETS) * 11 + 18)
+#define MAX_STAT_DATA_SIZE_PER_TARGET \
+ STAT_DATA_SIZE_PER_TARGET(LPFC_MAX_BUCKET_COUNT)
+
+
+/**
+ * sysfs_drvr_stat_data_read: Read callback function for lpfc_drvr_stat_data
+ * sysfs attribute.
+ * @kobj: Pointer to the kernel object
+ * @bin_attr: Attribute object
+ * @buff: Buffer pointer
+ * @off: File offset
+ * @count: Buffer size
+ *
+ * This function is the read call back function for lpfc_drvr_stat_data
+ * sysfs file. This function export the statistical data to user
+ * applications.
+ **/
+static ssize_t
+sysfs_drvr_stat_data_read(struct kobject *kobj, struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
+{
+ struct device *dev = container_of(kobj, struct device,
+ kobj);
+ struct Scsi_Host *shost = class_to_shost(dev);
+ struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
+ struct lpfc_hba *phba = vport->phba;
+ int i = 0, index = 0;
+ unsigned long nport_index;
+ struct lpfc_nodelist *ndlp = NULL;
+ nport_index = (unsigned long)off /
+ MAX_STAT_DATA_SIZE_PER_TARGET;
+
+ if (!vport->stat_data_enabled || vport->stat_data_blocked
+ || (phba->bucket_type == LPFC_NO_BUCKET))
+ return 0;
+
+ spin_lock_irq(shost->host_lock);
+ list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
+ if (!NLP_CHK_NODE_ACT(ndlp) || !ndlp->lat_data)
+ continue;
+
+ if (nport_index > 0) {
+ nport_index--;
+ continue;
+ }
+
+ if ((index + MAX_STAT_DATA_SIZE_PER_TARGET)
+ > count)
+ break;
+
+ if (!ndlp->lat_data)
+ continue;
+
+ /* Print the WWN */
+ sprintf(&buf[index], "%02x%02x%02x%02x%02x%02x%02x%02x:",
+ ndlp->nlp_portname.u.wwn[0],
+ ndlp->nlp_portname.u.wwn[1],
+ ndlp->nlp_portname.u.wwn[2],
+ ndlp->nlp_portname.u.wwn[3],
+ ndlp->nlp_portname.u.wwn[4],
+ ndlp->nlp_portname.u.wwn[5],
+ ndlp->nlp_portname.u.wwn[6],
+ ndlp->nlp_portname.u.wwn[7]);
+
+ index = strlen(buf);
+
+ for (i = 0; i < LPFC_MAX_BUCKET_COUNT; i++) {
+ sprintf(&buf[index], "%010u,",
+ ndlp->lat_data[i].cmd_count);
+ index = strlen(buf);
+ }
+ sprintf(&buf[index], "\n");
+ index = strlen(buf);
+ }
+ spin_unlock_irq(shost->host_lock);
+ return index;
+}
+
+static struct bin_attribute sysfs_drvr_stat_data_attr = {
+ .attr = {
+ .name = "lpfc_drvr_stat_data",
+ .mode = S_IRUSR,
+ .owner = THIS_MODULE,
+ },
+ .size = LPFC_MAX_TARGET * MAX_STAT_DATA_SIZE_PER_TARGET,
+ .read = sysfs_drvr_stat_data_read,
+ .write = NULL,
+};
+
/*
# lpfc_link_speed: Link speed selection for initializing the Fibre Channel
# connection.
@@ -2502,6 +2832,7 @@
&dev_attr_lpfc_enable_hba_heartbeat,
&dev_attr_lpfc_sg_seg_cnt,
&dev_attr_lpfc_max_scsicmpl_time,
+ &dev_attr_lpfc_stat_data_ctrl,
NULL,
};
@@ -2524,6 +2855,8 @@
&dev_attr_nport_evt_cnt,
&dev_attr_npiv_info,
&dev_attr_lpfc_enable_da_id,
+ &dev_attr_lpfc_max_scsicmpl_time,
+ &dev_attr_lpfc_stat_data_ctrl,
NULL,
};
@@ -2958,7 +3291,14 @@
if (error)
goto out_remove_ctlreg_attr;
+ error = sysfs_create_bin_file(&shost->shost_dev.kobj,
+ &sysfs_drvr_stat_data_attr);
+ if (error)
+ goto out_remove_mbox_attr;
+
return 0;
+out_remove_mbox_attr:
+ sysfs_remove_bin_file(&shost->shost_dev.kobj, &sysfs_mbox_attr);
out_remove_ctlreg_attr:
sysfs_remove_bin_file(&shost->shost_dev.kobj, &sysfs_ctlreg_attr);
out:
@@ -2973,7 +3313,8 @@
lpfc_free_sysfs_attr(struct lpfc_vport *vport)
{
struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
-
+ sysfs_remove_bin_file(&shost->shost_dev.kobj,
+ &sysfs_drvr_stat_data_attr);
sysfs_remove_bin_file(&shost->shost_dev.kobj, &sysfs_mbox_attr);
sysfs_remove_bin_file(&shost->shost_dev.kobj, &sysfs_ctlreg_attr);
}