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[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>
This commit is contained in:
Vikas Chaudhary 2010-07-22 16:57:43 +05:30 committed by James Bottomley
parent caf19d3860
commit fe4f0bdeea
1 changed files with 38 additions and 5 deletions
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43
drivers/scsi/scsi_transport_iscsi.c
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@ -1783,14 +1783,42 @@ show_priv_session_##field(struct device *dev, \
{ \
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 @@ do { \
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 @@ iscsi_register_transport(struct iscsi_transport *tt)
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);