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Message-ID: <20180727134524.366e9425@canb.auug.org.au>
Date: Fri, 27 Jul 2018 13:45:24 +1000
From: Stephen Rothwell <sfr@...b.auug.org.au>
To: Jason Gunthorpe <jgg@...lanox.com>
Cc: David Miller <davem@...emloft.net>,
Networking <netdev@...r.kernel.org>,
Doug Ledford <dledford@...hat.com>,
Linux-Next Mailing List <linux-next@...r.kernel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Parav Pandit <parav@...lanox.com>,
Ursula Braun <ubraun@...ux.ibm.com>,
Leon Romanovsky <leonro@...lanox.com>,
linux-rdma@...r.kernel.org
Subject: Re: linux-next: manual merge of the net-next tree with the rdma
tree
Hi all,
On Fri, 27 Jul 2018 13:28:47 +1000 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> I applied this merge fix patch:
The final conflict resolution actually looks like this:
(the rdma tree changes to net/smc/smc_core.c are dropped)
c1d4bb2af93573ee4a21538a1a97b568a2344499
diff --cc net/smc/smc_ib.c
index 74f29f814ec1,2cc64bc8ae20..debc6e44f738
--- a/net/smc/smc_ib.c
+++ b/net/smc/smc_ib.c
@@@ -144,6 -142,93 +143,95 @@@ out
return rc;
}
+ static int smc_ib_fill_mac(struct smc_ib_device *smcibdev, u8 ibport)
+ {
- struct ib_gid_attr gattr;
- union ib_gid gid;
- int rc;
++ const struct ib_gid_attr *gattr;
++ int rc = 0;
+
- rc = ib_query_gid(smcibdev->ibdev, ibport, 0, &gid, &gattr);
- if (rc || !gattr.ndev)
- return -ENODEV;
++ gattr = rdma_get_gid_attr(smcibdev->ibdev, ibport, 0);
++ if (IS_ERR(gattr))
++ return PTR_ERR(gattr);
++ if (!gattr->ndev) {
++ rc = -ENODEV;
++ goto done;
++ }
+
- memcpy(smcibdev->mac[ibport - 1], gattr.ndev->dev_addr, ETH_ALEN);
- dev_put(gattr.ndev);
- return 0;
++ memcpy(smcibdev->mac[ibport - 1], gattr->ndev->dev_addr, ETH_ALEN);
++done:
++ rdma_put_gid_attr(gattr);
++ return rc;
+ }
+
+ /* Create an identifier unique for this instance of SMC-R.
+ * The MAC-address of the first active registered IB device
+ * plus a random 2-byte number is used to create this identifier.
+ * This name is delivered to the peer during connection initialization.
+ */
+ static inline void smc_ib_define_local_systemid(struct smc_ib_device *smcibdev,
+ u8 ibport)
+ {
+ memcpy(&local_systemid[2], &smcibdev->mac[ibport - 1],
+ sizeof(smcibdev->mac[ibport - 1]));
+ get_random_bytes(&local_systemid[0], 2);
+ }
+
+ bool smc_ib_port_active(struct smc_ib_device *smcibdev, u8 ibport)
+ {
+ return smcibdev->pattr[ibport - 1].state == IB_PORT_ACTIVE;
+ }
+
+ /* determine the gid for an ib-device port and vlan id */
+ int smc_ib_determine_gid(struct smc_ib_device *smcibdev, u8 ibport,
+ unsigned short vlan_id, u8 gid[], u8 *sgid_index)
+ {
- struct ib_gid_attr gattr;
- union ib_gid _gid;
++ const struct ib_gid_attr *gattr;
+ int i;
+
+ for (i = 0; i < smcibdev->pattr[ibport - 1].gid_tbl_len; i++) {
- memset(&_gid, 0, SMC_GID_SIZE);
- memset(&gattr, 0, sizeof(gattr));
- if (ib_query_gid(smcibdev->ibdev, ibport, i, &_gid, &gattr))
++ gattr = rdma_get_gid_attr(smcibdev->ibdev, ibport, i);
++ if (IS_ERR(gattr))
+ continue;
- if (!gattr.ndev)
++ if (!gattr->ndev)
+ continue;
- if (((!vlan_id && !is_vlan_dev(gattr.ndev)) ||
- (vlan_id && is_vlan_dev(gattr.ndev) &&
- vlan_dev_vlan_id(gattr.ndev) == vlan_id)) &&
- gattr.gid_type == IB_GID_TYPE_IB) {
++ if (((!vlan_id && !is_vlan_dev(gattr->ndev)) ||
++ (vlan_id && is_vlan_dev(gattr->ndev) &&
++ vlan_dev_vlan_id(gattr->ndev) == vlan_id)) &&
++ gattr->gid_type == IB_GID_TYPE_IB) {
+ if (gid)
- memcpy(gid, &_gid, SMC_GID_SIZE);
++ memcpy(gid, &gattr->gid, SMC_GID_SIZE);
+ if (sgid_index)
+ *sgid_index = i;
- dev_put(gattr.ndev);
++ rdma_put_gid_attr(gattr);
+ return 0;
+ }
- dev_put(gattr.ndev);
++ rdma_put_gid_attr(gattr);
+ }
+ return -ENODEV;
+ }
+
+ static int smc_ib_remember_port_attr(struct smc_ib_device *smcibdev, u8 ibport)
+ {
+ int rc;
+
+ memset(&smcibdev->pattr[ibport - 1], 0,
+ sizeof(smcibdev->pattr[ibport - 1]));
+ rc = ib_query_port(smcibdev->ibdev, ibport,
+ &smcibdev->pattr[ibport - 1]);
+ if (rc)
+ goto out;
+ /* the SMC protocol requires specification of the RoCE MAC address */
+ rc = smc_ib_fill_mac(smcibdev, ibport);
+ if (rc)
+ goto out;
+ if (!strncmp(local_systemid, SMC_LOCAL_SYSTEMID_RESET,
+ sizeof(local_systemid)) &&
+ smc_ib_port_active(smcibdev, ibport))
+ /* create unique system identifier */
+ smc_ib_define_local_systemid(smcibdev, ibport);
+ out:
+ return rc;
+ }
+
/* process context wrapper for might_sleep smc_ib_remember_port_attr */
static void smc_ib_port_event_work(struct work_struct *work)
{
--
Cheers,
Stephen Rothwell
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