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[SCSI] fcoe, libfcoe: Add support for FIP. FCoE discovery and keep-alive.

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FIP is the new standard way to discover Fibre-Channel Forwarders (FCFs)
by sending solicitations and listening for advertisements from FCFs.

It also provides for keep-alives and period advertisements so that both
parties know they have connectivity.  If the FCF loses connectivity to
the storage fabric, it can send a Link Reset to inform the E_node.

This version is also compatible with pre-FIP implementations, so no
configured selection between FIP mode and non-FIP mode is required.

We wait a couple seconds after sending the initial solicitation
and then send an old-style FLOGI.  If we receive any FIP frames,
we use FIP only mode.  If the old FLOGI receives a response,
we disable FIP mode.  After every reset or link up, this
determination is repeated.

Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Joe Eykholt
2009-03-17 11:42:40 -07:00
committed by James Bottomley
parent af5f428763
commit 97c8389d54
4 changed files with 1499 additions and 137 deletions
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19
drivers/scsi/fcoe/fcoe.h
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@ -26,10 +26,6 @@
#define FCOE_MAX_QUEUE_DEPTH 256
#define FCOE_LOW_QUEUE_DEPTH 32
/* destination address mode */
#define FCOE_GW_ADDR_MODE 0x00
#define FCOE_FCOUI_ADDR_MODE 0x01
#define FCOE_WORD_TO_BYTE 4
#define FCOE_VERSION "0.1"
@ -59,24 +55,17 @@ struct fcoe_percpu_s {
*/
struct fcoe_softc {
struct list_head list;
struct fc_lport *lp;
struct net_device *real_dev;
struct net_device *phys_dev; /* device with ethtool_ops */
struct packet_type fcoe_packet_type;
struct packet_type fip_packet_type;
struct sk_buff_head fcoe_pending_queue;
u8 fcoe_pending_queue_active;
u8 dest_addr[ETH_ALEN];
u8 ctl_src_addr[ETH_ALEN];
u8 data_src_addr[ETH_ALEN];
/*
* fcoe protocol address learning related stuff
*/
u16 flogi_oxid;
u8 flogi_progress;
u8 address_mode;
struct fcoe_ctlr ctlr;
};
#define fcoe_from_ctlr(fc) container_of(fc, struct fcoe_softc, ctlr)
static inline struct net_device *fcoe_netdev(
const struct fc_lport *lp)
{