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SUNRPC: Cache cred of process creating the rpc_client

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When converting kuids to AUTH_UNIX creds, etc we will want to use the
same user namespace as the process that created the rpc client.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Trond Myklebust 2019-04-24 17:46:42 -04:00 committed by Anna Schumaker
parent 2cfd11f16f
commit 79caa5fad4
8 changed files with 22 additions and 2 deletions
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1
fs/lockd/host.c
View File

@ -458,6 +458,7 @@ nlm_bind_host(struct nlm_host *host)
.authflavor = RPC_AUTH_UNIX,
.flags = (RPC_CLNT_CREATE_NOPING |
RPC_CLNT_CREATE_AUTOBIND),
.cred = current_cred(),
};
/*

1
fs/lockd/mon.c
View File

@ -82,6 +82,7 @@ static struct rpc_clnt *nsm_create(struct net *net, const char *nodename)
.version = NSM_VERSION,
.authflavor = RPC_AUTH_NULL,
.flags = RPC_CLNT_CREATE_NOPING,
.cred = current_cred(),
};
return rpc_create(&args);

1
fs/nfs/client.c
View File

@ -500,6 +500,7 @@ int nfs_create_rpc_client(struct nfs_client *clp,
.program = &nfs_program,
.version = clp->rpc_ops->version,
.authflavor = flavor,
.cred = current_cred(),
};
if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags))

2
fs/nfs/mount_clnt.c
View File

@ -163,6 +163,7 @@ int nfs_mount(struct nfs_mount_request *info)
.program = &mnt_program,
.version = info->version,
.authflavor = RPC_AUTH_UNIX,
.cred = current_cred(),
};
struct rpc_clnt *mnt_clnt;
int status;
@ -249,6 +250,7 @@ void nfs_umount(const struct nfs_mount_request *info)
.version = info->version,
.authflavor = RPC_AUTH_UNIX,
.flags = RPC_CLNT_CREATE_NOPING,
.cred = current_cred(),
};
struct rpc_message msg = {
.rpc_argp = info->dirpath,

1
fs/nfsd/nfs4callback.c
View File

@ -868,6 +868,7 @@ static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *c
.program = &cb_program,
.version = 1,
.flags = (RPC_CLNT_CREATE_NOPING | RPC_CLNT_CREATE_QUIET),
.cred = current_cred(),
};
struct rpc_clnt *client;
const struct cred *cred;

2
include/linux/sunrpc/clnt.h
View File

@ -72,6 +72,7 @@ struct rpc_clnt {
struct dentry *cl_debugfs; /* debugfs directory */
#endif
struct rpc_xprt_iter cl_xpi;
const struct cred *cl_cred;
};
/*
@ -126,6 +127,7 @@ struct rpc_create_args {
unsigned long flags;
char *client_name;
struct svc_xprt *bc_xprt; /* NFSv4.1 backchannel */
const struct cred *cred;
};
struct rpc_add_xprt_test {

7
net/sunrpc/clnt.c
View File

@ -394,6 +394,7 @@ static struct rpc_clnt * rpc_new_client(const struct rpc_create_args *args,
if (err)
goto out_no_clid;
clnt->cl_cred = get_cred(args->cred);
clnt->cl_procinfo = version->procs;
clnt->cl_maxproc = version->nrprocs;
clnt->cl_prog = args->prognumber ? : program->number;
@ -439,6 +440,7 @@ static struct rpc_clnt * rpc_new_client(const struct rpc_create_args *args,
out_no_path:
rpc_free_iostats(clnt->cl_metrics);
out_no_stats:
put_cred(clnt->cl_cred);
rpc_free_clid(clnt);
out_no_clid:
kfree(clnt);
@ -631,6 +633,7 @@ static struct rpc_clnt *__rpc_clone_client(struct rpc_create_args *args,
new->cl_discrtry = clnt->cl_discrtry;
new->cl_chatty = clnt->cl_chatty;
new->cl_principal = clnt->cl_principal;
new->cl_cred = get_cred(clnt->cl_cred);
return new;
out_err:
@ -652,6 +655,7 @@ struct rpc_clnt *rpc_clone_client(struct rpc_clnt *clnt)
.prognumber = clnt->cl_prog,
.version = clnt->cl_vers,
.authflavor = clnt->cl_auth->au_flavor,
.cred = clnt->cl_cred,
};
return __rpc_clone_client(&args, clnt);
}
@ -673,6 +677,7 @@ rpc_clone_client_set_auth(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
.prognumber = clnt->cl_prog,
.version = clnt->cl_vers,
.authflavor = flavor,
.cred = clnt->cl_cred,
};
return __rpc_clone_client(&args, clnt);
}
@ -880,6 +885,7 @@ rpc_free_client(struct rpc_clnt *clnt)
xprt_put(rcu_dereference_raw(clnt->cl_xprt));
xprt_iter_destroy(&clnt->cl_xpi);
rpciod_down();
put_cred(clnt->cl_cred);
rpc_free_clid(clnt);
kfree(clnt);
return parent;
@ -944,6 +950,7 @@ struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *old,
.prognumber = program->number,
.version = vers,
.authflavor = old->cl_auth->au_flavor,
.cred = old->cl_cred,
};
struct rpc_clnt *clnt;
int err;

9
net/sunrpc/rpcb_clnt.c
View File

@ -240,6 +240,7 @@ static int rpcb_create_local_unix(struct net *net)
.program = &rpcb_program,
.version = RPCBVERS_2,
.authflavor = RPC_AUTH_NULL,
.cred = current_cred(),
/*
* We turn off the idle timeout to prevent the kernel
* from automatically disconnecting the socket.
@ -299,6 +300,7 @@ static int rpcb_create_local_net(struct net *net)
.program = &rpcb_program,
.version = RPCBVERS_2,
.authflavor = RPC_AUTH_UNIX,
.cred = current_cred(),
.flags = RPC_CLNT_CREATE_NOPING,
};
struct rpc_clnt *clnt, *clnt4;
@ -358,7 +360,8 @@ out:
static struct rpc_clnt *rpcb_create(struct net *net, const char *nodename,
const char *hostname,
struct sockaddr *srvaddr, size_t salen,
int proto, u32 version)
int proto, u32 version,
const struct cred *cred)
{
struct rpc_create_args args = {
.net = net,
@ -370,6 +373,7 @@ static struct rpc_clnt *rpcb_create(struct net *net, const char *nodename,
.program = &rpcb_program,
.version = version,
.authflavor = RPC_AUTH_UNIX,
.cred = cred,
.flags = (RPC_CLNT_CREATE_NOPING |
RPC_CLNT_CREATE_NONPRIVPORT),
};
@ -745,7 +749,8 @@ void rpcb_getport_async(struct rpc_task *task)
rpcb_clnt = rpcb_create(xprt->xprt_net,
clnt->cl_nodename,
xprt->servername, sap, salen,
xprt->prot, bind_version);
xprt->prot, bind_version,
clnt->cl_cred);
if (IS_ERR(rpcb_clnt)) {
status = PTR_ERR(rpcb_clnt);
dprintk("RPC: %5u %s: rpcb_create failed, error %ld\n",