[SCSI] iscsi_transport: Modidify recovery_tmo from sysfs
Added support to modify session->recovery_tmo from sysfs
Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Signed-off-by: Ravi Anand <ravi.anand@qlogic.com>
Acked-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index b9aec30..d4b9662 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -1783,14 +1783,42 @@
{ \
struct iscsi_cls_session *session = \
iscsi_dev_to_session(dev->parent); \
+ if (session->field == -1) \
+ return sprintf(buf, "off\n"); \
return sprintf(buf, format"\n", session->field); \
}
-#define iscsi_priv_session_attr(field, format) \
+#define iscsi_priv_session_attr_store(field) \
+static ssize_t \
+store_priv_session_##field(struct device *dev, \
+ struct device_attribute *attr, \
+ const char *buf, size_t count) \
+{ \
+ int val; \
+ char *cp; \
+ struct iscsi_cls_session *session = \
+ iscsi_dev_to_session(dev->parent); \
+ if ((session->state == ISCSI_SESSION_FREE) || \
+ (session->state == ISCSI_SESSION_FAILED)) \
+ return -EBUSY; \
+ if (strncmp(buf, "off", 3) == 0) \
+ session->field = -1; \
+ else { \
+ val = simple_strtoul(buf, &cp, 0); \
+ if (*cp != '\0' && *cp != '\n') \
+ return -EINVAL; \
+ session->field = val; \
+ } \
+ return count; \
+}
+
+#define iscsi_priv_session_rw_attr(field, format) \
iscsi_priv_session_attr_show(field, format) \
-static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO, show_priv_session_##field, \
- NULL)
-iscsi_priv_session_attr(recovery_tmo, "%d");
+ iscsi_priv_session_attr_store(field) \
+static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUGO, \
+ show_priv_session_##field, \
+ store_priv_session_##field)
+iscsi_priv_session_rw_attr(recovery_tmo, "%d");
/*
* iSCSI host attrs
@@ -1821,6 +1849,11 @@
count++; \
} while (0)
+#define SETUP_PRIV_SESSION_RW_ATTR(field) \
+do { \
+ priv->session_attrs[count] = &dev_attr_priv_sess_##field; \
+ count++; \
+} while (0)
#define SETUP_SESSION_RD_ATTR(field, param_flag) \
do { \
@@ -2008,7 +2041,7 @@
SETUP_SESSION_RD_ATTR(ifacename, ISCSI_IFACE_NAME);
SETUP_SESSION_RD_ATTR(initiatorname, ISCSI_INITIATOR_NAME);
SETUP_SESSION_RD_ATTR(targetalias, ISCSI_TARGET_ALIAS);
- SETUP_PRIV_SESSION_RD_ATTR(recovery_tmo);
+ SETUP_PRIV_SESSION_RW_ATTR(recovery_tmo);
SETUP_PRIV_SESSION_RD_ATTR(state);
BUG_ON(count > ISCSI_SESSION_ATTRS);