diff options
author | Chad Dupuis <chad.dupuis@cavium.com> | 2016-09-30 11:01:20 +0200 |
---|---|---|
committer | Martin K. Petersen <martin.petersen@oracle.com> | 2016-11-08 17:29:47 -0500 |
commit | fd37f66eb6801b6188155ce276d346754ac1799e (patch) | |
tree | 4936d26247db5ee310f791a119b765432ee5b5ff /drivers/scsi/fcoe | |
parent | f89b8d67db792a8a303e14e3d02785035e6f1a05 (diff) | |
download | linux-fd37f66eb6801b6188155ce276d346754ac1799e.tar.gz linux-fd37f66eb6801b6188155ce276d346754ac1799e.tar.bz2 linux-fd37f66eb6801b6188155ce276d346754ac1799e.zip |
scsi: fcoe: Harden CVL handling when we have not logged into the fabric.
If we haven't logged into the fabric yet we want to be a little more nuanced
with our CVL handling than what we've been:
- If the FCF has been selected, check the source MAC to make sure the frame is
from the FCF we've selected.
- If a FCF is selected and the CVL is from the FCF but we have not logged in
yet, then reset everything and go back to solicitation.
Signed-off-by: Chad Dupuis <chad.dupuis@cavium.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/fcoe')
-rw-r--r-- | drivers/scsi/fcoe/fcoe_ctlr.c | 35 |
1 files changed, 32 insertions, 3 deletions
diff --git a/drivers/scsi/fcoe/fcoe_ctlr.c b/drivers/scsi/fcoe/fcoe_ctlr.c index 9bba58191b3d..05573c32254d 100644 --- a/drivers/scsi/fcoe/fcoe_ctlr.c +++ b/drivers/scsi/fcoe/fcoe_ctlr.c @@ -1316,7 +1316,7 @@ drop: * The overall length has already been checked. */ static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip, - struct fip_header *fh) + struct sk_buff *skb) { struct fip_desc *desc; struct fip_mac_desc *mp; @@ -1331,14 +1331,18 @@ static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip, int num_vlink_desc; int reset_phys_port = 0; struct fip_vn_desc **vlink_desc_arr = NULL; + struct fip_header *fh = (struct fip_header *)skb->data; + struct ethhdr *eh = eth_hdr(skb); LIBFCOE_FIP_DBG(fip, "Clear Virtual Link received\n"); - if (!fcf || !lport->port_id) { + if (!fcf) { /* * We are yet to select best FCF, but we got CVL in the * meantime. reset the ctlr and let it rediscover the FCF */ + LIBFCOE_FIP_DBG(fip, "Resetting fcoe_ctlr as FCF has not been " + "selected yet\n"); mutex_lock(&fip->ctlr_mutex); fcoe_ctlr_reset(fip); mutex_unlock(&fip->ctlr_mutex); @@ -1346,6 +1350,31 @@ static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip, } /* + * If we've selected an FCF check that the CVL is from there to avoid + * processing CVLs from an unexpected source. If it is from an + * unexpected source drop it on the floor. + */ + if (!ether_addr_equal(eh->h_source, fcf->fcf_mac)) { + LIBFCOE_FIP_DBG(fip, "Dropping CVL due to source address " + "mismatch with FCF src=%pM\n", eh->h_source); + return; + } + + /* + * If we haven't logged into the fabric but receive a CVL we should + * reset everything and go back to solicitation. + */ + if (!lport->port_id) { + LIBFCOE_FIP_DBG(fip, "lport not logged in, resoliciting\n"); + mutex_lock(&fip->ctlr_mutex); + fcoe_ctlr_reset(fip); + mutex_unlock(&fip->ctlr_mutex); + fc_lport_reset(fip->lp); + fcoe_ctlr_solicit(fip, NULL); + return; + } + + /* * mask of required descriptors. Validating each one clears its bit. */ desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME); @@ -1576,7 +1605,7 @@ static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb) if (op == FIP_OP_DISC && sub == FIP_SC_ADV) fcoe_ctlr_recv_adv(fip, skb); else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) - fcoe_ctlr_recv_clr_vlink(fip, fiph); + fcoe_ctlr_recv_clr_vlink(fip, skb); kfree_skb(skb); return 0; drop: |