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ksmbd: fix missing RDMA-capable flag for IPoIB device in ksmbd_rdma_capable_netdev() 

[ Upstream commit ecce70cf17d91c3dd87a0c4ea00b2d1387729701 ]

Physical ib_device does not have an underlying net_device, thus its
association with IPoIB net_device cannot be retrieved via
ops.get_netdev() or ib_device_get_by_netdev(). ksmbd reads physical
ib_device port GUID from the lower 16 bytes of the hardware addresses on
IPoIB net_device and match its underlying ib_device using ib_find_gid()

Signed-off-by: Kangjing Huang <huangkangjing@gmail.com>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Reviewed-by: Tom Talpey <tom@talpey.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Kangjing Huang 2023-12-31 16:19:04 +09:00 committed by Greg Kroah-Hartman
parent 31c453b374
commit dca63bad39
1 changed files with 30 additions and 10 deletions
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40
fs/smb/server/transport_rdma.c
View File

@ -2140,8 +2140,7 @@ static int smb_direct_ib_client_add(struct ib_device *ib_dev)
if (ib_dev->node_type != RDMA_NODE_IB_CA)
smb_direct_port = SMB_DIRECT_PORT_IWARP;
if (!ib_dev->ops.get_netdev ||
!rdma_frwr_is_supported(&ib_dev->attrs))
if (!rdma_frwr_is_supported(&ib_dev->attrs))
return 0;
smb_dev = kzalloc(sizeof(*smb_dev), GFP_KERNEL);
@ -2241,17 +2240,38 @@ bool ksmbd_rdma_capable_netdev(struct net_device *netdev)
for (i = 0; i < smb_dev->ib_dev->phys_port_cnt; i++) {
struct net_device *ndev;
ndev = smb_dev->ib_dev->ops.get_netdev(smb_dev->ib_dev,
i + 1);
if (!ndev)
continue;
if (smb_dev->ib_dev->ops.get_netdev) {
ndev = smb_dev->ib_dev->ops.get_netdev(
smb_dev->ib_dev, i + 1);
if (!ndev)
continue;
if (ndev == netdev) {
if (ndev == netdev) {
dev_put(ndev);
rdma_capable = true;
goto out;
}
dev_put(ndev);
rdma_capable = true;
goto out;
/* if ib_dev does not implement ops.get_netdev
* check for matching infiniband GUID in hw_addr
*/
} else if (netdev->type == ARPHRD_INFINIBAND) {
struct netdev_hw_addr *ha;
union ib_gid gid;
u32 port_num;
int ret;
netdev_hw_addr_list_for_each(
ha, &netdev->dev_addrs) {
memcpy(&gid, ha->addr + 4, sizeof(gid));
ret = ib_find_gid(smb_dev->ib_dev, &gid,
&port_num, NULL);
if (!ret) {
rdma_capable = true;
goto out;
}
}
}
dev_put(ndev);
}
}
out: