From: Kiran Patil <[email protected]>
Problem: When initiator sends write command to target, target tries to assign
new sequence. It
allocates new exchangeID (RX_ID) always from non-offloaded pool
(Non-offload EMA)
Fix: Enhanced fcoe_oem_match routine to look at F_CTL flags and if it is
exchange responder and
command type is WRITEDATA, then function returns TRUE instead of
FALSE. This function
is used to determine which pool to use (offload pool of exchange is
used only if this
function returns TRUE).
Technical Notes: N/A
Signed-off-by: Kiran Patil <[email protected]>
---
drivers/scsi/fcoe/fcoe.c | 19 +++++++++++++++++--
1 files changed, 17 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index 78e8f5a..a27baa4 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -750,12 +750,27 @@ static int fcoe_shost_config(struct fc_lport *lport,
struct device *dev)
* The offload EM that this routine is associated with will handle any
* packets that are for SCSI read requests.
*
+ * This has been enhanced to work when FCoE stack is operating in target
+ * mode.
+ *
* Returns: True for read types I/O, otherwise returns false.
*/
bool fcoe_oem_match(struct fc_frame *fp)
{
- return fc_fcp_is_read(fr_fsp(fp)) &&
- (fr_fsp(fp)->data_len > fcoe_ddp_min);
+ struct fc_frame_header *fh = fc_frame_header_get(fp);
+ struct fcp_cmnd *fcp;
+
+ if (fc_fcp_is_read(fr_fsp(fp)) &&
+ (fr_fsp(fp)->data_len > fcoe_ddp_min))
+ return true;
+ else if (!(ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)) {
+ fcp = fc_frame_payload_get(fp, sizeof(*fcp));
+ if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN &&
+ fcp && (ntohl(fcp->fc_dl) > fcoe_ddp_min) &&
+ (fcp->fc_flags & FCP_CFL_WRDATA))
+ return true;
+ }
+ return false;
}
/**
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