[SCSI] lpfc 8.1.10 : Add support for new lpfc soft_wwpn attribute
Add support for a new lpfc soft_wwpn sysfs attribute
Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index 0de6932..9496e87 100644
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -551,6 +551,119 @@
lpfc_board_mode_show, lpfc_board_mode_store);
static CLASS_DEVICE_ATTR(issue_reset, S_IWUSR, NULL, lpfc_issue_reset);
+
+static char *lpfc_soft_wwpn_key = "C99G71SL8032A";
+
+static ssize_t
+lpfc_soft_wwpn_enable_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 cnt = count;
+
+ /*
+ * We're doing a simple sanity check for soft_wwpn setting.
+ * We require that the user write a specific key to enable
+ * the soft_wwpn attribute to be settable. Once the attribute
+ * is written, the enable key resets. If further updates are
+ * desired, the key must be written again to re-enable the
+ * attribute.
+ *
+ * The "key" is not secret - it is a hardcoded string shown
+ * here. The intent is to protect against the random user or
+ * application that is just writing attributes.
+ */
+
+ /* count may include a LF at end of string */
+ 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))
+ return -EINVAL;
+
+ phba->soft_wwpn_enable = 1;
+ return count;
+}
+static CLASS_DEVICE_ATTR(lpfc_soft_wwpn_enable, S_IWUSR, NULL,
+ lpfc_soft_wwpn_enable_store);
+
+static ssize_t
+lpfc_soft_wwpn_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", phba->cfg_soft_wwpn);
+}
+
+
+static ssize_t
+lpfc_soft_wwpn_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;
+ struct completion online_compl;
+ int stat1=0, stat2=0;
+ unsigned int i, j, cnt=count;
+ u8 wwpn[8];
+
+ /* count may include a LF at end of string */
+ if (buf[cnt-1] == '\n')
+ cnt--;
+
+ if (!phba->soft_wwpn_enable || (cnt < 16) || (cnt > 18) ||
+ ((cnt == 17) && (*buf++ != 'x')) ||
+ ((cnt == 18) && ((*buf++ != '0') || (*buf++ != 'x'))))
+ return -EINVAL;
+
+ phba->soft_wwpn_enable = 0;
+
+ memset(wwpn, 0, sizeof(wwpn));
+
+ /* 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) {
+ wwpn[i/2] = j & 0xff;
+ j = 0;
+ }
+ }
+ phba->cfg_soft_wwpn = wwn_to_u64(wwpn);
+ fc_host_port_name(host) = phba->cfg_soft_wwpn;
+
+ dev_printk(KERN_NOTICE, &phba->pcidev->dev,
+ "lpfc%d: Reinitializing to use soft_wwpn\n", phba->brd_no);
+
+ init_completion(&online_compl);
+ lpfc_workq_post_event(phba, &stat1, &online_compl, LPFC_EVT_OFFLINE);
+ wait_for_completion(&online_compl);
+ if (stat1)
+ lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+ "%d:0463 lpfc_soft_wwpn attribute set failed to reinit "
+ "adapter - %d\n", phba->brd_no, stat1);
+
+ init_completion(&online_compl);
+ lpfc_workq_post_event(phba, &stat2, &online_compl, LPFC_EVT_ONLINE);
+ wait_for_completion(&online_compl);
+ if (stat2)
+ lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+ "%d:0464 lpfc_soft_wwpn attribute set failed to reinit "
+ "adapter - %d\n", phba->brd_no, stat2);
+
+ return (stat1 || stat2) ? -EIO : count;
+}
+static CLASS_DEVICE_ATTR(lpfc_soft_wwpn, S_IRUGO | S_IWUSR,\
+ lpfc_soft_wwpn_show, lpfc_soft_wwpn_store);
+
+
static int lpfc_poll = 0;
module_param(lpfc_poll, int, 0);
MODULE_PARM_DESC(lpfc_poll, "FCP ring polling mode control:"
@@ -832,6 +945,7 @@
LPFC_ATTR_RW(poll_tmo, 10, 1, 255,
"Milliseconds driver will wait between polling FCP ring");
+
struct class_device_attribute *lpfc_host_attrs[] = {
&class_device_attr_info,
&class_device_attr_serialnum,
@@ -867,6 +981,8 @@
&class_device_attr_issue_reset,
&class_device_attr_lpfc_poll,
&class_device_attr_lpfc_poll_tmo,
+ &class_device_attr_lpfc_soft_wwpn,
+ &class_device_attr_lpfc_soft_wwpn_enable,
NULL,
};
@@ -1668,6 +1784,7 @@
lpfc_devloss_tmo_init(phba, lpfc_devloss_tmo);
lpfc_nodev_tmo_init(phba, lpfc_nodev_tmo);
phba->cfg_poll = lpfc_poll;
+ phba->cfg_soft_wwpn = 0L;
/*
* The total number of segments is the configuration value plus 2