[PATCH] RPC: [PATCH] improve rpcauthauth_create error returns
Currently we return -ENOMEM for every single failure to create a new auth.
This is actually accurate for auth_null and auth_unix, but for auth_gss it's a
bit confusing.
Allow rpcauth_create (and the ->create methods) to return errors. With this
patch, the user may sometimes see an EINVAL instead. Whee.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 350c48c1..97b3fe7 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -160,11 +160,10 @@
void
nfs_umount_begin(struct super_block *sb)
{
- struct nfs_server *server = NFS_SB(sb);
- struct rpc_clnt *rpc;
+ struct rpc_clnt *rpc = NFS_SB(sb)->client;
/* -EIO all pending I/O */
- if ((rpc = server->client) != NULL)
+ if (!IS_ERR(rpc))
rpc_killall_tasks(rpc);
}
@@ -450,11 +449,14 @@
return PTR_ERR(server->client);
/* RFC 2623, sec 2.3.2 */
if (authflavor != RPC_AUTH_UNIX) {
+ struct rpc_auth *auth;
+
server->client_sys = rpc_clone_client(server->client);
if (IS_ERR(server->client_sys))
return PTR_ERR(server->client_sys);
- if (!rpcauth_create(RPC_AUTH_UNIX, server->client_sys))
- return -ENOMEM;
+ auth = rpcauth_create(RPC_AUTH_UNIX, server->client_sys);
+ if (IS_ERR(auth))
+ return PTR_ERR(auth);
} else {
atomic_inc(&server->client->cl_count);
server->client_sys = server->client;
@@ -1450,6 +1452,7 @@
memset(server, 0, sizeof(struct nfs_server));
/* Zero out the NFS state stuff */
init_nfsv4_state(server);
+ server->client = server->client_sys = ERR_PTR(-EINVAL);
root = &server->fh;
if (data->flags & NFS_MOUNT_VER3)
@@ -1506,9 +1509,9 @@
kill_anon_super(s);
- if (server->client != NULL && !IS_ERR(server->client))
+ if (!IS_ERR(server->client))
rpc_shutdown_client(server->client);
- if (server->client_sys != NULL && !IS_ERR(server->client_sys))
+ if (!IS_ERR(server->client_sys))
rpc_shutdown_client(server->client_sys);
if (!(server->flags & NFS_MOUNT_NONLM))
@@ -1650,7 +1653,7 @@
}
down_write(&clp->cl_sem);
- if (clp->cl_rpcclient == NULL) {
+ if (IS_ERR(clp->cl_rpcclient)) {
xprt = xprt_create_proto(proto, &server->addr, &timeparms);
if (IS_ERR(xprt)) {
up_write(&clp->cl_sem);
@@ -1711,9 +1714,12 @@
}
if (clnt->cl_auth->au_flavor != authflavour) {
- if (rpcauth_create(authflavour, clnt) == NULL) {
+ struct rpc_auth *auth;
+
+ auth = rpcauth_create(authflavour, clnt);
+ if (IS_ERR(auth)) {
dprintk("%s: couldn't create credcache!\n", __FUNCTION__);
- return -ENOMEM;
+ return PTR_ERR(auth);
}
}
@@ -1788,6 +1794,7 @@
memset(server, 0, sizeof(struct nfs_server));
/* Zero out the NFS state stuff */
init_nfsv4_state(server);
+ server->client = server->client_sys = ERR_PTR(-EINVAL);
p = nfs_copy_user_string(NULL, &data->hostname, 256);
if (IS_ERR(p))
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 17b187f..591ad1d 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -110,6 +110,7 @@
INIT_LIST_HEAD(&clp->cl_superblocks);
init_waitqueue_head(&clp->cl_waitq);
rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS4 client");
+ clp->cl_rpcclient = ERR_PTR(-EINVAL);
clp->cl_boot_time = CURRENT_TIME;
clp->cl_state = 1 << NFS4CLNT_OK;
return clp;
@@ -131,7 +132,7 @@
if (clp->cl_cred)
put_rpccred(clp->cl_cred);
nfs_idmap_delete(clp);
- if (clp->cl_rpcclient)
+ if (!IS_ERR(clp->cl_rpcclient))
rpc_shutdown_client(clp->cl_rpcclient);
kfree(clp);
nfs_callback_down();
diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c
index 9bcec9b..505e2d4 100644
--- a/net/sunrpc/auth.c
+++ b/net/sunrpc/auth.c
@@ -66,10 +66,10 @@
u32 flavor = pseudoflavor_to_flavor(pseudoflavor);
if (flavor >= RPC_AUTH_MAXFLAVOR || !(ops = auth_flavors[flavor]))
- return NULL;
+ return ERR_PTR(-EINVAL);
auth = ops->create(clnt, pseudoflavor);
- if (!auth)
- return NULL;
+ if (IS_ERR(auth))
+ return auth;
if (clnt->cl_auth)
rpcauth_destroy(clnt->cl_auth);
clnt->cl_auth = auth;
diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
index 7d88db8..2f7b867 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -660,14 +660,16 @@
{
struct gss_auth *gss_auth;
struct rpc_auth * auth;
+ int err = -ENOMEM; /* XXX? */
dprintk("RPC: creating GSS authenticator for client %p\n",clnt);
if (!try_module_get(THIS_MODULE))
- return NULL;
+ return ERR_PTR(err);
if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL)))
goto out_dec;
gss_auth->client = clnt;
+ err = -EINVAL;
gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor);
if (!gss_auth->mech) {
printk(KERN_WARNING "%s: Pseudoflavor %d not found!",
@@ -686,15 +688,18 @@
auth->au_flavor = flavor;
atomic_set(&auth->au_count, 1);
- if (rpcauth_init_credcache(auth, GSS_CRED_EXPIRE) < 0)
+ err = rpcauth_init_credcache(auth, GSS_CRED_EXPIRE);
+ if (err)
goto err_put_mech;
snprintf(gss_auth->path, sizeof(gss_auth->path), "%s/%s",
clnt->cl_pathname,
gss_auth->mech->gm_name);
gss_auth->dentry = rpc_mkpipe(gss_auth->path, clnt, &gss_upcall_ops, RPC_PIPE_WAIT_FOR_OPEN);
- if (IS_ERR(gss_auth->dentry))
+ if (IS_ERR(gss_auth->dentry)) {
+ err = PTR_ERR(gss_auth->dentry);
goto err_put_mech;
+ }
return auth;
err_put_mech:
@@ -703,7 +708,7 @@
kfree(gss_auth);
out_dec:
module_put(THIS_MODULE);
- return NULL;
+ return ERR_PTR(err);
}
static void
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index b36797a..9da1deb 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -103,6 +103,7 @@
{
struct rpc_version *version;
struct rpc_clnt *clnt = NULL;
+ struct rpc_auth *auth;
int err;
int len;
@@ -157,10 +158,11 @@
if (err < 0)
goto out_no_path;
- err = -ENOMEM;
- if (!rpcauth_create(flavor, clnt)) {
+ auth = rpcauth_create(flavor, clnt);
+ if (IS_ERR(auth)) {
printk(KERN_INFO "RPC: Couldn't create auth handle (flavor %u)\n",
flavor);
+ err = PTR_ERR(auth);
goto out_no_auth;
}