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RDMA/siw: Make node GUIDs valid EUI-64 identifiers
>From the IBTA: "GUID (Global Unique Identifier): A globally unique EUI-64 compliant identifier." Make sure that siw GUIDs are valid EUI-64 identifiers. Link: https://lore.kernel.org/r/20190930231707.48259-6-bvanassche@acm.org Cc: Bernard Metzler <bmt@zurich.ibm.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
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@ -16,6 +16,7 @@
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#include <linux/module.h>
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#include <linux/dma-mapping.h>
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#include <net/addrconf.h>
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#include <rdma/ib_verbs.h>
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#include <rdma/ib_user_verbs.h>
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#include <rdma/rdma_netlink.h>
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@ -350,15 +351,19 @@ static struct siw_device *siw_device_create(struct net_device *netdev)
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sdev->netdev = netdev;
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if (netdev->type != ARPHRD_LOOPBACK) {
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memcpy(&base_dev->node_guid, netdev->dev_addr, 6);
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addrconf_addr_eui48((unsigned char *)&base_dev->node_guid,
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netdev->dev_addr);
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} else {
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/*
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* The loopback device does not have a HW address,
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* but connection mangagement lib expects gid != 0
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*/
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size_t gidlen = min_t(size_t, strlen(base_dev->name), 6);
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size_t len = min_t(size_t, strlen(base_dev->name), 6);
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char addr[6] = { };
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memcpy(&base_dev->node_guid, base_dev->name, gidlen);
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memcpy(addr, base_dev->name, len);
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addrconf_addr_eui48((unsigned char *)&base_dev->node_guid,
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addr);
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}
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base_dev->uverbs_cmd_mask =
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(1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
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