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nfsd4: allow backchannel recovery

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Now that we have a list of connections to choose from, we can teach the
callback code to just pick a suitable connection and use that, instead
of insisting on forever using the connection that the first
create_session was sent with.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
J. Bruce Fields
2010-06-15 17:25:45 -04:00
committed by J. Bruce Fields
parent 1d1bc8f207
commit dcbeaa68db
2 changed files with 43 additions and 9 deletions
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16
fs/nfsd/nfs4state.c
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@@ -642,6 +642,7 @@ static void nfsd4_conn_lost(struct svc_xpt_user *u)
free_conn(c);
}
spin_unlock(&clp->cl_lock);
/* XXX: mark callback for update, probe callback */
}
static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags)
@@ -790,16 +791,19 @@ static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct n
free_session(&new->se_ref);
return NULL;
}
if (!clp->cl_cb_session && (cses->flags & SESSION4_BACK_CHAN)) {
if (cses->flags & SESSION4_BACK_CHAN) {
struct sockaddr *sa = svc_addr(rqstp);
clp->cl_cb_session = new;
clp->cl_cb_conn.cb_xprt = rqstp->rq_xprt;
svc_xprt_get(rqstp->rq_xprt);
/*
* This is a little silly; with sessions there's no real
* use for the callback address. Use the peer address
* as a reasonable default for now, but consider fixing
* the rpc client not to require an address in the
* future:
*/
rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa);
clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa);
nfsd4_probe_callback(clp);
}
nfsd4_probe_callback(clp);
return new;
}