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nfs: check hostname in nfs_get_client

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We reference cl_hostname in many places. Add a check to make
sure it exists.

Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Peng Tao 2014-07-08 11:45:48 +08:00 committed by Trond Myklebust
parent a363e32e94
commit 31434f496a
1 changed files with 7 additions and 2 deletions
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9
fs/nfs/client.c
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@ -482,8 +482,13 @@ nfs_get_client(const struct nfs_client_initdata *cl_init,
struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id);
const struct nfs_rpc_ops *rpc_ops = cl_init->nfs_mod->rpc_ops;
if (cl_init->hostname == NULL) {
WARN_ON(1);
return NULL;
}
dprintk("--> nfs_get_client(%s,v%u)\n",
cl_init->hostname ?: "", rpc_ops->version);
cl_init->hostname, rpc_ops->version);
/* see if the client already exists */
do {
@ -510,7 +515,7 @@ nfs_get_client(const struct nfs_client_initdata *cl_init,
} while (!IS_ERR(new));
dprintk("<-- nfs_get_client() Failed to find %s (%ld)\n",
cl_init->hostname ?: "", PTR_ERR(new));
cl_init->hostname, PTR_ERR(new));
return new;
}
EXPORT_SYMBOL_GPL(nfs_get_client);