[SCSI] iscsi cls: sysfs group is_visible callout for conn attrs

The iscsi class currently does not support writable sysfs
attrs for LLD sysfs settings. This patch converts the
iscsi class and drivers to use the attribute container
sysfs group and the sysfs group's is_visible callout
to be able to support readable or writable sysfs attrs.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/drivers/scsi/cxgbi/libcxgbi.c b/drivers/scsi/cxgbi/libcxgbi.c
index 77ac217ad5ce..e5f4f968ed7b 100644
--- a/drivers/scsi/cxgbi/libcxgbi.c
+++ b/drivers/scsi/cxgbi/libcxgbi.c
@@ -2566,6 +2566,32 @@ void cxgbi_iscsi_cleanup(struct iscsi_transport *itp,
 }
 EXPORT_SYMBOL_GPL(cxgbi_iscsi_cleanup);
 
+mode_t cxgbi_attr_is_visible(int param_type, int param)
+{
+        switch (param_type) {
+        case ISCSI_PARAM:
+                switch (param) {
+                case ISCSI_PARAM_MAX_RECV_DLENGTH:
+                case ISCSI_PARAM_MAX_XMIT_DLENGTH:
+                case ISCSI_PARAM_HDRDGST_EN:
+                case ISCSI_PARAM_DATADGST_EN:
+                case ISCSI_PARAM_CONN_ADDRESS:
+                case ISCSI_PARAM_CONN_PORT:
+                case ISCSI_PARAM_EXP_STATSN:
+                case ISCSI_PARAM_PERSISTENT_ADDRESS:
+                case ISCSI_PARAM_PERSISTENT_PORT:
+                case ISCSI_PARAM_PING_TMO:
+                case ISCSI_PARAM_RECV_TMO:
+                        return S_IRUGO;
+                default:
+                        return 0;
+                }
+        }
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(cxgbi_attr_is_visible);
+
 static int __init libcxgbi_init_module(void)
 {
         sw_tag_idx_bits = (__ilog2_u32(ISCSI_ITT_MASK)) + 1;