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afs: Use a dynamic port if 7001 is in use

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It is not required that the afs client operate on port 7001.
The port could be in use because another kernel or userspace
client has already bound to it.

If the port is in use, just fallback to using a dynamic port.

Signed-off-by: Marc Dionne <marc.dionne@auristor.com>
Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
Marc Dionne 2017-11-02 15:27:52 +00:00 committed by David Howells
parent dab17c1add
commit 83732ec514
1 changed files with 4 additions and 0 deletions
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4
fs/afs/rxrpc.c
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@ -61,6 +61,10 @@ int afs_open_socket(struct afs_net *net)
srx.transport.sin6.sin6_port = htons(AFS_CM_PORT);
ret = kernel_bind(socket, (struct sockaddr *) &srx, sizeof(srx));
if (ret == -EADDRINUSE) {
srx.transport.sin6.sin6_port = 0;
ret = kernel_bind(socket, (struct sockaddr *) &srx, sizeof(srx));
}
if (ret < 0)
goto error_2;