[SCSI] lpfc 8.1.11 : Add soft_wwnn sysfs attribute, rename soft_wwn_enable

The driver now allows both wwpn and wwnn to be set.

Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 74 insertions, 10 deletions

diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index e2ac7ba3d8ad..f247e786af99 100644
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -552,10 +552,10 @@ static CLASS_DEVICE_ATTR(board_mode, S_IRUGO | S_IWUSR,
 static CLASS_DEVICE_ATTR(issue_reset, S_IWUSR, NULL, lpfc_issue_reset);
 
 
-static char *lpfc_soft_wwpn_key = "C99G71SL8032A";
+static char *lpfc_soft_wwn_key = "C99G71SL8032A";
 
 static ssize_t
-lpfc_soft_wwpn_enable_store(struct class_device *cdev, const char *buf,
+lpfc_soft_wwn_enable_store(struct class_device *cdev, const char *buf,
                                 size_t count)
 {
         struct Scsi_Host *host = class_to_shost(cdev);
@@ -579,15 +579,15 @@ lpfc_soft_wwpn_enable_store(struct class_device *cdev, const char *buf,
         if (buf[cnt-1] == '\n')
                 cnt--;
 
-        if ((cnt != strlen(lpfc_soft_wwpn_key)) ||
-            (strncmp(buf, lpfc_soft_wwpn_key, strlen(lpfc_soft_wwpn_key)) != 0))
+        if ((cnt != strlen(lpfc_soft_wwn_key)) ||
+            (strncmp(buf, lpfc_soft_wwn_key, strlen(lpfc_soft_wwn_key)) != 0))
                 return -EINVAL;
 
-        phba->soft_wwpn_enable = 1;
+        phba->soft_wwn_enable = 1;
         return count;
 }
-static CLASS_DEVICE_ATTR(lpfc_soft_wwpn_enable, S_IWUSR, NULL,
-                                lpfc_soft_wwpn_enable_store);
+static CLASS_DEVICE_ATTR(lpfc_soft_wwn_enable, S_IWUSR, NULL,
+                                lpfc_soft_wwn_enable_store);
 
 static ssize_t
 lpfc_soft_wwpn_show(struct class_device *cdev, char *buf)
@@ -613,12 +613,12 @@ lpfc_soft_wwpn_store(struct class_device *cdev, const char *buf, size_t count)
         if (buf[cnt-1] == '\n')
                 cnt--;
 
-        if (!phba->soft_wwpn_enable || (cnt < 16) || (cnt > 18) ||
+        if (!phba->soft_wwn_enable || (cnt < 16) || (cnt > 18) ||
             ((cnt == 17) && (*buf++ != 'x')) ||
             ((cnt == 18) && ((*buf++ != '0') || (*buf++ != 'x'))))
                 return -EINVAL;
 
-        phba->soft_wwpn_enable = 0;
+        phba->soft_wwn_enable = 0;
 
         memset(wwpn, 0, sizeof(wwpn));
 
@@ -639,6 +639,8 @@ lpfc_soft_wwpn_store(struct class_device *cdev, const char *buf, size_t count)
         }
         phba->cfg_soft_wwpn = wwn_to_u64(wwpn);
         fc_host_port_name(host) = phba->cfg_soft_wwpn;
+        if (phba->cfg_soft_wwnn)
+                fc_host_node_name(host) = phba->cfg_soft_wwnn;
 
         dev_printk(KERN_NOTICE, &phba->pcidev->dev,
                    "lpfc%d: Reinitializing to use soft_wwpn\n", phba->brd_no);
@@ -664,6 +666,66 @@ lpfc_soft_wwpn_store(struct class_device *cdev, const char *buf, size_t count)
 static CLASS_DEVICE_ATTR(lpfc_soft_wwpn, S_IRUGO | S_IWUSR,\
                          lpfc_soft_wwpn_show, lpfc_soft_wwpn_store);
 
+static ssize_t
+lpfc_soft_wwnn_show(struct class_device *cdev, char *buf)
+{
+        struct Scsi_Host *host = class_to_shost(cdev);
+        struct lpfc_hba *phba = (struct lpfc_hba*)host->hostdata;
+        return snprintf(buf, PAGE_SIZE, "0x%llx\n",
+                        (unsigned long long)phba->cfg_soft_wwnn);
+}
+
+
+static ssize_t
+lpfc_soft_wwnn_store(struct class_device *cdev, const char *buf, size_t count)
+{
+        struct Scsi_Host *host = class_to_shost(cdev);
+        struct lpfc_hba *phba = (struct lpfc_hba*)host->hostdata;
+        unsigned int i, j, cnt=count;
+        u8 wwnn[8];
+
+        /* count may include a LF at end of string */
+        if (buf[cnt-1] == '\n')
+                cnt--;
+
+        if (!phba->soft_wwn_enable || (cnt < 16) || (cnt > 18) ||
+            ((cnt == 17) && (*buf++ != 'x')) ||
+            ((cnt == 18) && ((*buf++ != '0') || (*buf++ != 'x'))))
+                return -EINVAL;
+
+        /*
+         * Allow wwnn to be set many times, as long as the enable is set.
+         * However, once the wwpn is set, everything locks.
+         */
+
+        memset(wwnn, 0, sizeof(wwnn));
+
+        /* Validate and store the new name */
+        for (i=0, j=0; i < 16; i++) {
+                if ((*buf >= 'a') && (*buf <= 'f'))
+                        j = ((j << 4) | ((*buf++ -'a') + 10));
+                else if ((*buf >= 'A') && (*buf <= 'F'))
+                        j = ((j << 4) | ((*buf++ -'A') + 10));
+                else if ((*buf >= '0') && (*buf <= '9'))
+                        j = ((j << 4) | (*buf++ -'0'));
+                else
+                        return -EINVAL;
+                if (i % 2) {
+                        wwnn[i/2] = j & 0xff;
+                        j = 0;
+                }
+        }
+        phba->cfg_soft_wwnn = wwn_to_u64(wwnn);
+
+        dev_printk(KERN_NOTICE, &phba->pcidev->dev,
+                   "lpfc%d: soft_wwnn set. Value will take effect upon "
+                   "setting of the soft_wwpn\n", phba->brd_no);
+
+        return count;
+}
+static CLASS_DEVICE_ATTR(lpfc_soft_wwnn, S_IRUGO | S_IWUSR,\
+                         lpfc_soft_wwnn_show, lpfc_soft_wwnn_store);
+
 
 static int lpfc_poll = 0;
 module_param(lpfc_poll, int, 0);
@@ -1009,8 +1071,9 @@ struct class_device_attribute *lpfc_host_attrs[] = {
         &class_device_attr_lpfc_poll,
         &class_device_attr_lpfc_poll_tmo,
         &class_device_attr_lpfc_use_msi,
+        &class_device_attr_lpfc_soft_wwnn,
         &class_device_attr_lpfc_soft_wwpn,
-        &class_device_attr_lpfc_soft_wwpn_enable,
+        &class_device_attr_lpfc_soft_wwn_enable,
         NULL,
 };
 
@@ -1815,6 +1878,7 @@ lpfc_get_cfgparam(struct lpfc_hba *phba)
         lpfc_devloss_tmo_init(phba, lpfc_devloss_tmo);
         lpfc_nodev_tmo_init(phba, lpfc_nodev_tmo);
         phba->cfg_poll = lpfc_poll;
+        phba->cfg_soft_wwnn = 0L;
         phba->cfg_soft_wwpn = 0L;
 
         /*