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scsi: qedf: Add non-offload receive filters.

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Drop invalid or unexpected FCoE frames that come into the non-offload path
since the FCoE firmware would not do the filtering for us.

Signed-off-by: Chad Dupuis <chad.dupuis@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Chad Dupuis 2017-05-31 06:33:57 -07:00 committed by Martin K. Petersen
parent b09fdc3aac
commit 384d5a9b41
1 changed files with 43 additions and 0 deletions
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43
drivers/scsi/qedf/qedf_main.c
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@ -2087,6 +2087,8 @@ static void qedf_recv_frame(struct qedf_ctx *qedf,
u8 *dest_mac = NULL;
struct fcoe_hdr *hp;
struct qedf_rport *fcport;
struct fc_lport *vn_port;
u32 f_ctl;
lport = qedf->lport;
if (lport == NULL || lport->state == LPORT_ST_DISABLED) {
@ -2123,6 +2125,10 @@ static void qedf_recv_frame(struct qedf_ctx *qedf,
fh = fc_frame_header_get(fp);
/*
* Invalid frame filters.
*/
if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA &&
fh->fh_type == FC_TYPE_FCP) {
/* Drop FCP data. We dont this in L2 path */
@ -2148,6 +2154,43 @@ static void qedf_recv_frame(struct qedf_ctx *qedf,
return;
}
if (ntoh24(&dest_mac[3]) != ntoh24(fh->fh_d_id)) {
QEDF_ERR(&(qedf->dbg_ctx), "FC frame d_id mismatch with MAC %pM.\n",
dest_mac);
return;
}
if (qedf->ctlr.state) {
if (!ether_addr_equal(mac, qedf->ctlr.dest_addr)) {
QEDF_ERR(&(qedf->dbg_ctx), "Wrong source address mac:%pM dest_addr:%pM.\n",
mac, qedf->ctlr.dest_addr);
kfree_skb(skb);
return;
}
}
vn_port = fc_vport_id_lookup(lport, ntoh24(fh->fh_d_id));
/*
* If the destination ID from the frame header does not match what we
* have on record for lport and the search for a NPIV port came up
* empty then this is not addressed to our port so simply drop it.
*/
if (lport->port_id != ntoh24(fh->fh_d_id) && !vn_port) {
QEDF_ERR(&(qedf->dbg_ctx), "Dropping frame due to destination mismatch: lport->port_id=%x fh->d_id=%x.\n",
lport->port_id, ntoh24(fh->fh_d_id));
kfree_skb(skb);
return;
}
f_ctl = ntoh24(fh->fh_f_ctl);
if ((fh->fh_type == FC_TYPE_BLS) && (f_ctl & FC_FC_SEQ_CTX) &&
(f_ctl & FC_FC_EX_CTX)) {
/* Drop incoming ABTS response that has both SEQ/EX CTX set */
kfree_skb(skb);
return;
}
/*
* If a connection is uploading, drop incoming FCoE frames as there
* is a small window where we could try to return a frame while libfc