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RPCSEC_GSS: Switch auth_gss to use the new framework for pipefs dentries
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust
parent
6739ffb754
commit
1917228435
@ -71,6 +71,13 @@ static unsigned int gss_expired_cred_retry_delay = GSS_RETRY_EXPIRED;
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* using integrity (two 4-byte integers): */
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#define GSS_VERF_SLACK 100
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struct gss_pipe {
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struct rpc_pipe_dir_object pdo;
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struct rpc_pipe *pipe;
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struct rpc_clnt *clnt;
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const char *name;
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};
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struct gss_auth {
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struct kref kref;
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struct rpc_auth rpc_auth;
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@ -84,7 +91,7 @@ struct gss_auth {
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* mechanism (for example, "krb5") and exists for
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* backwards-compatibility with older gssd's.
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*/
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struct rpc_pipe *pipe[2];
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struct gss_pipe *gss_pipe[2];
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const char *target_name;
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};
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@ -456,7 +463,7 @@ gss_alloc_msg(struct gss_auth *gss_auth,
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kfree(gss_msg);
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return ERR_PTR(vers);
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}
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gss_msg->pipe = gss_auth->pipe[vers];
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gss_msg->pipe = gss_auth->gss_pipe[vers]->pipe;
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INIT_LIST_HEAD(&gss_msg->list);
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rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq");
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init_waitqueue_head(&gss_msg->waitqueue);
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@ -791,85 +798,83 @@ gss_pipe_destroy_msg(struct rpc_pipe_msg *msg)
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}
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}
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static void gss_pipes_dentries_destroy(struct rpc_auth *auth)
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static void gss_pipe_dentry_destroy(struct dentry *dir,
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struct rpc_pipe_dir_object *pdo)
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{
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struct gss_auth *gss_auth;
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struct gss_pipe *gss_pipe = pdo->pdo_data;
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struct rpc_pipe *pipe = gss_pipe->pipe;
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gss_auth = container_of(auth, struct gss_auth, rpc_auth);
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if (gss_auth->pipe[0]->dentry) {
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rpc_unlink(gss_auth->pipe[0]->dentry);
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gss_auth->pipe[0]->dentry = NULL;
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}
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if (gss_auth->pipe[1]->dentry) {
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rpc_unlink(gss_auth->pipe[1]->dentry);
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gss_auth->pipe[1]->dentry = NULL;
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if (pipe->dentry != NULL) {
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rpc_unlink(pipe->dentry);
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pipe->dentry = NULL;
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}
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}
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static int gss_pipes_dentries_create(struct rpc_auth *auth)
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static int gss_pipe_dentry_create(struct dentry *dir,
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struct rpc_pipe_dir_object *pdo)
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{
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int err;
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struct gss_auth *gss_auth;
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struct rpc_clnt *clnt;
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struct gss_pipe *p = pdo->pdo_data;
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struct dentry *dentry;
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gss_auth = container_of(auth, struct gss_auth, rpc_auth);
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clnt = gss_auth->client;
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dentry = rpc_mkpipe_dentry(clnt->cl_dentry, "gssd",
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clnt, gss_auth->pipe[1]);
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if (IS_ERR(dentry)) {
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err = PTR_ERR(dentry);
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goto err;
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}
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gss_auth->pipe[1]->dentry = dentry;
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dentry = rpc_mkpipe_dentry(clnt->cl_dentry, gss_auth->mech->gm_name,
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clnt, gss_auth->pipe[0]);
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if (IS_ERR(dentry)) {
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err = PTR_ERR(dentry);
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goto err_unlink_pipe_1;
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}
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dentry = rpc_mkpipe_dentry(dir, p->name, p->clnt, p->pipe);
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if (IS_ERR(dentry))
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return PTR_ERR(dentry);
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p->pipe->dentry = dentry;
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return 0;
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}
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err_unlink_pipe_1:
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rpc_unlink(gss_auth->pipe[1]->dentry);
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gss_auth->pipe[1]->dentry = NULL;
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static const struct rpc_pipe_dir_object_ops gss_pipe_dir_object_ops = {
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.create = gss_pipe_dentry_create,
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.destroy = gss_pipe_dentry_destroy,
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};
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static struct gss_pipe *gss_pipe_alloc(struct rpc_clnt *clnt,
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const char *name,
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const struct rpc_pipe_ops *upcall_ops)
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{
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struct net *net = rpc_net_ns(clnt);
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struct gss_pipe *p;
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int err = -ENOMEM;
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p = kmalloc(sizeof(*p), GFP_KERNEL);
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if (p == NULL)
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goto err;
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p->pipe = rpc_mkpipe_data(upcall_ops, RPC_PIPE_WAIT_FOR_OPEN);
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if (IS_ERR(p->pipe)) {
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err = PTR_ERR(p->pipe);
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goto err_free_gss_pipe;
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}
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p->name = name;
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p->clnt = clnt;
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rpc_init_pipe_dir_object(&p->pdo,
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&gss_pipe_dir_object_ops,
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p);
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err = rpc_add_pipe_dir_object(net, &clnt->cl_pipedir_objects, &p->pdo);
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if (!err)
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return p;
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rpc_destroy_pipe_data(p->pipe);
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err_free_gss_pipe:
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kfree(p);
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err:
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return err;
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return ERR_PTR(err);
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}
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static void gss_pipes_dentries_destroy_net(struct rpc_clnt *clnt,
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struct rpc_auth *auth)
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static void __gss_pipe_free(struct gss_pipe *p)
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{
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struct gss_auth *gss_auth = container_of(auth, struct gss_auth,
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rpc_auth);
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struct net *net = gss_auth->net;
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struct super_block *sb;
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struct rpc_clnt *clnt = p->clnt;
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struct net *net = rpc_net_ns(clnt);
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sb = rpc_get_sb_net(net);
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if (sb) {
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if (clnt->cl_dentry)
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gss_pipes_dentries_destroy(auth);
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rpc_put_sb_net(net);
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}
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rpc_remove_pipe_dir_object(net,
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&clnt->cl_pipedir_objects,
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&p->pdo);
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rpc_destroy_pipe_data(p->pipe);
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kfree(p);
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}
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static int gss_pipes_dentries_create_net(struct rpc_clnt *clnt,
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struct rpc_auth *auth)
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static void gss_pipe_free(struct gss_pipe *p)
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{
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struct gss_auth *gss_auth = container_of(auth, struct gss_auth,
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rpc_auth);
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struct net *net = gss_auth->net;
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struct super_block *sb;
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int err = 0;
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sb = rpc_get_sb_net(net);
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if (sb) {
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if (clnt->cl_dentry)
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err = gss_pipes_dentries_create(auth);
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rpc_put_sb_net(net);
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}
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return err;
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if (p != NULL)
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__gss_pipe_free(p);
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}
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/*
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@ -881,6 +886,7 @@ gss_create(struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
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{
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rpc_authflavor_t flavor = args->pseudoflavor;
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struct gss_auth *gss_auth;
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struct gss_pipe *gss_pipe;
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struct rpc_auth * auth;
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int err = -ENOMEM; /* XXX? */
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@ -915,39 +921,35 @@ gss_create(struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
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atomic_set(&auth->au_count, 1);
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kref_init(&gss_auth->kref);
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err = rpcauth_init_credcache(auth);
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if (err)
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goto err_put_mech;
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/*
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* Note: if we created the old pipe first, then someone who
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* examined the directory at the right moment might conclude
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* that we supported only the old pipe. So we instead create
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* the new pipe first.
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*/
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gss_auth->pipe[1] = rpc_mkpipe_data(&gss_upcall_ops_v1,
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RPC_PIPE_WAIT_FOR_OPEN);
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if (IS_ERR(gss_auth->pipe[1])) {
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err = PTR_ERR(gss_auth->pipe[1]);
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goto err_put_mech;
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gss_pipe = gss_pipe_alloc(clnt, "gssd", &gss_upcall_ops_v1);
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if (IS_ERR(gss_pipe)) {
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err = PTR_ERR(gss_pipe);
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goto err_destroy_credcache;
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}
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gss_auth->gss_pipe[1] = gss_pipe;
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gss_auth->pipe[0] = rpc_mkpipe_data(&gss_upcall_ops_v0,
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RPC_PIPE_WAIT_FOR_OPEN);
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if (IS_ERR(gss_auth->pipe[0])) {
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err = PTR_ERR(gss_auth->pipe[0]);
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gss_pipe = gss_pipe_alloc(clnt, gss_auth->mech->gm_name,
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&gss_upcall_ops_v0);
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if (IS_ERR(gss_pipe)) {
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err = PTR_ERR(gss_pipe);
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goto err_destroy_pipe_1;
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}
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err = gss_pipes_dentries_create_net(clnt, auth);
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if (err)
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goto err_destroy_pipe_0;
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err = rpcauth_init_credcache(auth);
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if (err)
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goto err_unlink_pipes;
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gss_auth->gss_pipe[0] = gss_pipe;
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return auth;
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err_unlink_pipes:
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gss_pipes_dentries_destroy_net(clnt, auth);
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err_destroy_pipe_0:
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rpc_destroy_pipe_data(gss_auth->pipe[0]);
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err_destroy_pipe_1:
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rpc_destroy_pipe_data(gss_auth->pipe[1]);
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__gss_pipe_free(gss_auth->gss_pipe[1]);
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err_destroy_credcache:
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rpcauth_destroy_credcache(auth);
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err_put_mech:
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gss_mech_put(gss_auth->mech);
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err_put_net:
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@ -963,9 +965,8 @@ out_dec:
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static void
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gss_free(struct gss_auth *gss_auth)
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{
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gss_pipes_dentries_destroy_net(gss_auth->client, &gss_auth->rpc_auth);
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rpc_destroy_pipe_data(gss_auth->pipe[0]);
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rpc_destroy_pipe_data(gss_auth->pipe[1]);
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gss_pipe_free(gss_auth->gss_pipe[0]);
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gss_pipe_free(gss_auth->gss_pipe[1]);
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gss_mech_put(gss_auth->mech);
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put_net(gss_auth->net);
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kfree(gss_auth->target_name);
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@ -985,14 +986,18 @@ gss_free_callback(struct kref *kref)
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static void
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gss_destroy(struct rpc_auth *auth)
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{
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struct gss_auth *gss_auth;
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struct gss_auth *gss_auth = container_of(auth,
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struct gss_auth, rpc_auth);
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dprintk("RPC: destroying GSS authenticator %p flavor %d\n",
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auth, auth->au_flavor);
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gss_pipe_free(gss_auth->gss_pipe[0]);
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gss_auth->gss_pipe[0] = NULL;
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gss_pipe_free(gss_auth->gss_pipe[1]);
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gss_auth->gss_pipe[1] = NULL;
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rpcauth_destroy_credcache(auth);
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gss_auth = container_of(auth, struct gss_auth, rpc_auth);
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kref_put(&gss_auth->kref, gss_free_callback);
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}
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@ -1676,8 +1681,6 @@ static const struct rpc_authops authgss_ops = {
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.destroy = gss_destroy,
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.lookup_cred = gss_lookup_cred,
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.crcreate = gss_create_cred,
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.pipes_create = gss_pipes_dentries_create,
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.pipes_destroy = gss_pipes_dentries_destroy,
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.list_pseudoflavors = gss_mech_list_pseudoflavors,
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.info2flavor = gss_mech_info2flavor,
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.flavor2info = gss_mech_flavor2info,
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