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nfsd: refactor set_client

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This'll be useful elsewhere.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
J. Bruce Fields 2021-01-21 17:57:41 -05:00 committed by Chuck Lever
parent 460d27091a
commit 7950b5316e
1 changed files with 16 additions and 16 deletions
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32
fs/nfsd/nfs4state.c
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@ -4633,40 +4633,40 @@ static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4
return nfserr_bad_seqid;
}
static struct nfs4_client *lookup_clientid(clientid_t *clid, bool sessions,
struct nfsd_net *nn)
{
struct nfs4_client *found;
spin_lock(&nn->client_lock);
found = find_confirmed_client(clid, sessions, nn);
if (found)
atomic_inc(&found->cl_rpc_users);
spin_unlock(&nn->client_lock);
return found;
}
static __be32 set_client(clientid_t *clid,
struct nfsd4_compound_state *cstate,
struct nfsd_net *nn,
bool sessions)
{
struct nfs4_client *found;
if (cstate->clp) {
found = cstate->clp;
if (!same_clid(&found->cl_clientid, clid))
if (!same_clid(&cstate->clp->cl_clientid, clid))
return nfserr_stale_clientid;
return nfs_ok;
}
if (STALE_CLIENTID(clid, nn))
return nfserr_stale_clientid;
/*
* For v4.1+ we get the client in the SEQUENCE op. If we don't have one
* cached already then we know this is for is for v4.0 and "sessions"
* will be false.
*/
WARN_ON_ONCE(cstate->session);
spin_lock(&nn->client_lock);
found = find_confirmed_client(clid, sessions, nn);
if (!found) {
spin_unlock(&nn->client_lock);
cstate->clp = lookup_clientid(clid, sessions, nn);
if (!cstate->clp)
return nfserr_expired;
}
atomic_inc(&found->cl_rpc_users);
spin_unlock(&nn->client_lock);
/* Cache the nfs4_client in cstate! */
cstate->clp = found;
return nfs_ok;
}