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authorJoe Eykholt <jeykholt@cisco.com>2010-07-20 15:20:14 -0700
committerJames Bottomley <James.Bottomley@suse.de>2010-07-28 09:05:54 -0500
commitf60e12e9c778c8256a646f80603d1b88ba5ce891 (patch)
tree732e918fc85cc441cd539be5e389e0dfd29a2199 /include/scsi
parent[SCSI] libfc: add FLOGI state to rport for VN2VN (diff)
downloadlinux-dev-f60e12e9c778c8256a646f80603d1b88ba5ce891.tar.xz
linux-dev-f60e12e9c778c8256a646f80603d1b88ba5ce891.zip
[SCSI] libfc: track FIP exchanges
When an exchange is received with a FIP encapsulation, we need to know that the response must be sent via FIP and what the original ELS opcode was. This becomes important for VN2VN mode, where we may receive FLOGI or LOGO from several peer VN_ports, and the LS_ACC or LS_RJT must be sent FIP-encapsulated with the correct sub-type. Add a field to the struct fc_frame, fr_encaps, to indicate the encapsulation values. That term is chosen to be neutral and LLD-agnostic in case non-FCoE/FIP LLDs might find it useful. The frame fr_encaps is transferred from the ingress frame to the exchange by fc_exch_recv_req(), and back to the outgoing frame by fc_seq_send(). This is taking the last byte in the skb->cb array. If needed, we could combine the info in sof, eof, flags, and encaps together into one field, but it'd be better to do that if and when its needed. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'include/scsi')
-rw-r--r--include/scsi/fc_frame.h3
-rw-r--r--include/scsi/libfc.h2
2 files changed, 5 insertions, 0 deletions
diff --git a/include/scsi/fc_frame.h b/include/scsi/fc_frame.h
index 15427fab8a57..29dd97d5b53a 100644
--- a/include/scsi/fc_frame.h
+++ b/include/scsi/fc_frame.h
@@ -51,6 +51,7 @@
#define fr_sof(fp) (fr_cb(fp)->fr_sof)
#define fr_eof(fp) (fr_cb(fp)->fr_eof)
#define fr_flags(fp) (fr_cb(fp)->fr_flags)
+#define fr_encaps(fp) (fr_cb(fp)->fr_encaps)
#define fr_max_payload(fp) (fr_cb(fp)->fr_max_payload)
#define fr_fsp(fp) (fr_cb(fp)->fr_fsp)
#define fr_crc(fp) (fr_cb(fp)->fr_crc)
@@ -69,6 +70,7 @@ struct fcoe_rcv_info {
u8 fr_sof; /* start of frame delimiter */
u8 fr_eof; /* end of frame delimiter */
u8 fr_flags; /* flags - see below */
+ u8 fr_encaps; /* LLD encapsulation info (e.g. FIP) */
u8 granted_mac[ETH_ALEN]; /* FCoE MAC address */
};
@@ -97,6 +99,7 @@ static inline void fc_frame_init(struct fc_frame *fp)
fr_dev(fp) = NULL;
fr_seq(fp) = NULL;
fr_flags(fp) = 0;
+ fr_encaps(fp) = 0;
}
struct fc_frame *fc_frame_alloc_fill(struct fc_lport *, size_t payload_len);
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index 24b91c922055..8d297f9a0a47 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -412,6 +412,7 @@ struct fc_seq {
* @esb_stat: ESB exchange status
* @r_a_tov: Resouce allocation time out value (in msecs)
* @seq_id: The next sequence ID to use
+ * @encaps: encapsulation information for lower-level driver
* @f_ctl: F_CTL flags for the sequence
* @fh_type: The frame type
* @class: The class of service
@@ -443,6 +444,7 @@ struct fc_exch {
u32 esb_stat;
u32 r_a_tov;
u8 seq_id;
+ u8 encaps;
u32 f_ctl;
u8 fh_type;
enum fc_class class;