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[SCSI] iscsi class, iscsi_tcp, iser, qla4xxx: add netdevname sysfs attr

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iSCSI must support software iscsi (iscsi_tcp, iser), hardware iscsi (qla4xxx),
and partial offload (broadcom). To be able to allow each stack or driver
or port (virtual or physical) to be able to log into the same target portal
we use the initiator tuple [[HWADDRESS | NETDEVNAME], INITIATOR_NAME] and
the target tuple [TARGETNAME, CONN_ADDRESS, CONN_PORT] to id a session.
This patch adds the netdev name, which is used by software iscsi when
it binds a session to a netdevice using the SO_BINDTODEVICE sock opt.
It cannot use HWADDRESS because if someone did vlans then the same netdevice
will have the same mac and the initiator,target id will not be unique.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Cc: Roland Dreier <rdreier@cisco.com>
Cc: David C Somayajulu <david.somayajulu@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Mike Christie
2007-05-30 12:57:25 -05:00
committed by James Bottomley
parent 2223696192
commit d8196ed218
7 changed files with 25 additions and 5 deletions
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11
drivers/scsi/libiscsi.c
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@@ -1483,6 +1483,7 @@ void iscsi_session_teardown(struct iscsi_cls_session *cls_session)
kfree(session->username);
kfree(session->username_in);
kfree(session->targetname);
kfree(session->netdev);
kfree(session->hwaddress);
kfree(session->initiatorname);
@@ -2040,6 +2041,12 @@ int iscsi_host_get_param(struct Scsi_Host *shost, enum iscsi_host_param param,
int len;
switch (param) {
case ISCSI_HOST_PARAM_NETDEV_NAME:
if (!session->netdev)
len = sprintf(buf, "%s\n", "default");
else
len = sprintf(buf, "%s\n", session->netdev);
break;
case ISCSI_HOST_PARAM_HWADDRESS:
if (!session->hwaddress)
len = sprintf(buf, "%s\n", "default");
@@ -2067,6 +2074,10 @@ int iscsi_host_set_param(struct Scsi_Host *shost, enum iscsi_host_param param,
struct iscsi_session *session = iscsi_hostdata(shost->hostdata);
switch (param) {
case ISCSI_HOST_PARAM_NETDEV_NAME:
if (!session->netdev)
session->netdev = kstrdup(buf, GFP_KERNEL);
break;
case ISCSI_HOST_PARAM_HWADDRESS:
if (!session->hwaddress)
session->hwaddress = kstrdup(buf, GFP_KERNEL);