From 1917228435eebdf4e3267fa95cace694b2fb4efd Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 26 Aug 2013 16:44:42 -0400 Subject: [PATCH] RPCSEC_GSS: Switch auth_gss to use the new framework for pipefs dentries Signed-off-by: Trond Myklebust --- net/sunrpc/auth_gss/auth_gss.c | 181 +++++++++++++++++---------------- 1 file changed, 92 insertions(+), 89 deletions(-) diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c index c0d36bb87d3e..d214aecdbeef 100644 --- a/net/sunrpc/auth_gss/auth_gss.c +++ b/net/sunrpc/auth_gss/auth_gss.c @@ -71,6 +71,13 @@ static unsigned int gss_expired_cred_retry_delay = GSS_RETRY_EXPIRED; * using integrity (two 4-byte integers): */ #define GSS_VERF_SLACK 100 +struct gss_pipe { + struct rpc_pipe_dir_object pdo; + struct rpc_pipe *pipe; + struct rpc_clnt *clnt; + const char *name; +}; + struct gss_auth { struct kref kref; struct rpc_auth rpc_auth; @@ -84,7 +91,7 @@ struct gss_auth { * mechanism (for example, "krb5") and exists for * backwards-compatibility with older gssd's. */ - struct rpc_pipe *pipe[2]; + struct gss_pipe *gss_pipe[2]; const char *target_name; }; @@ -456,7 +463,7 @@ gss_alloc_msg(struct gss_auth *gss_auth, kfree(gss_msg); return ERR_PTR(vers); } - gss_msg->pipe = gss_auth->pipe[vers]; + gss_msg->pipe = gss_auth->gss_pipe[vers]->pipe; INIT_LIST_HEAD(&gss_msg->list); rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); init_waitqueue_head(&gss_msg->waitqueue); @@ -791,85 +798,83 @@ gss_pipe_destroy_msg(struct rpc_pipe_msg *msg) } } -static void gss_pipes_dentries_destroy(struct rpc_auth *auth) +static void gss_pipe_dentry_destroy(struct dentry *dir, + struct rpc_pipe_dir_object *pdo) { - struct gss_auth *gss_auth; + struct gss_pipe *gss_pipe = pdo->pdo_data; + struct rpc_pipe *pipe = gss_pipe->pipe; - gss_auth = container_of(auth, struct gss_auth, rpc_auth); - if (gss_auth->pipe[0]->dentry) { - rpc_unlink(gss_auth->pipe[0]->dentry); - gss_auth->pipe[0]->dentry = NULL; - } - if (gss_auth->pipe[1]->dentry) { - rpc_unlink(gss_auth->pipe[1]->dentry); - gss_auth->pipe[1]->dentry = NULL; + if (pipe->dentry != NULL) { + rpc_unlink(pipe->dentry); + pipe->dentry = NULL; } } -static int gss_pipes_dentries_create(struct rpc_auth *auth) +static int gss_pipe_dentry_create(struct dentry *dir, + struct rpc_pipe_dir_object *pdo) { - int err; - struct gss_auth *gss_auth; - struct rpc_clnt *clnt; + struct gss_pipe *p = pdo->pdo_data; struct dentry *dentry; - gss_auth = container_of(auth, struct gss_auth, rpc_auth); - clnt = gss_auth->client; + dentry = rpc_mkpipe_dentry(dir, p->name, p->clnt, p->pipe); + if (IS_ERR(dentry)) + return PTR_ERR(dentry); + p->pipe->dentry = dentry; + return 0; +} + +static const struct rpc_pipe_dir_object_ops gss_pipe_dir_object_ops = { + .create = gss_pipe_dentry_create, + .destroy = gss_pipe_dentry_destroy, +}; + +static struct gss_pipe *gss_pipe_alloc(struct rpc_clnt *clnt, + const char *name, + const struct rpc_pipe_ops *upcall_ops) +{ + struct net *net = rpc_net_ns(clnt); + struct gss_pipe *p; + int err = -ENOMEM; - dentry = rpc_mkpipe_dentry(clnt->cl_dentry, "gssd", - clnt, gss_auth->pipe[1]); - if (IS_ERR(dentry)) { - err = PTR_ERR(dentry); + p = kmalloc(sizeof(*p), GFP_KERNEL); + if (p == NULL) goto err; + p->pipe = rpc_mkpipe_data(upcall_ops, RPC_PIPE_WAIT_FOR_OPEN); + if (IS_ERR(p->pipe)) { + err = PTR_ERR(p->pipe); + goto err_free_gss_pipe; } - gss_auth->pipe[1]->dentry = dentry; - dentry = rpc_mkpipe_dentry(clnt->cl_dentry, gss_auth->mech->gm_name, - clnt, gss_auth->pipe[0]); - if (IS_ERR(dentry)) { - err = PTR_ERR(dentry); - goto err_unlink_pipe_1; - } - return 0; - -err_unlink_pipe_1: - rpc_unlink(gss_auth->pipe[1]->dentry); - gss_auth->pipe[1]->dentry = NULL; + p->name = name; + p->clnt = clnt; + rpc_init_pipe_dir_object(&p->pdo, + &gss_pipe_dir_object_ops, + p); + err = rpc_add_pipe_dir_object(net, &clnt->cl_pipedir_objects, &p->pdo); + if (!err) + return p; + rpc_destroy_pipe_data(p->pipe); +err_free_gss_pipe: + kfree(p); err: - return err; + return ERR_PTR(err); } -static void gss_pipes_dentries_destroy_net(struct rpc_clnt *clnt, - struct rpc_auth *auth) +static void __gss_pipe_free(struct gss_pipe *p) { - struct gss_auth *gss_auth = container_of(auth, struct gss_auth, - rpc_auth); - struct net *net = gss_auth->net; - struct super_block *sb; + struct rpc_clnt *clnt = p->clnt; + struct net *net = rpc_net_ns(clnt); - sb = rpc_get_sb_net(net); - if (sb) { - if (clnt->cl_dentry) - gss_pipes_dentries_destroy(auth); - rpc_put_sb_net(net); - } + rpc_remove_pipe_dir_object(net, + &clnt->cl_pipedir_objects, + &p->pdo); + rpc_destroy_pipe_data(p->pipe); + kfree(p); } -static int gss_pipes_dentries_create_net(struct rpc_clnt *clnt, - struct rpc_auth *auth) +static void gss_pipe_free(struct gss_pipe *p) { - struct gss_auth *gss_auth = container_of(auth, struct gss_auth, - rpc_auth); - struct net *net = gss_auth->net; - struct super_block *sb; - int err = 0; - - sb = rpc_get_sb_net(net); - if (sb) { - if (clnt->cl_dentry) - err = gss_pipes_dentries_create(auth); - rpc_put_sb_net(net); - } - return err; + if (p != NULL) + __gss_pipe_free(p); } /* @@ -881,6 +886,7 @@ gss_create(struct rpc_auth_create_args *args, struct rpc_clnt *clnt) { rpc_authflavor_t flavor = args->pseudoflavor; struct gss_auth *gss_auth; + struct gss_pipe *gss_pipe; struct rpc_auth * auth; int err = -ENOMEM; /* XXX? */ @@ -915,39 +921,35 @@ gss_create(struct rpc_auth_create_args *args, struct rpc_clnt *clnt) atomic_set(&auth->au_count, 1); kref_init(&gss_auth->kref); + err = rpcauth_init_credcache(auth); + if (err) + goto err_put_mech; /* * Note: if we created the old pipe first, then someone who * examined the directory at the right moment might conclude * that we supported only the old pipe. So we instead create * the new pipe first. */ - gss_auth->pipe[1] = rpc_mkpipe_data(&gss_upcall_ops_v1, - RPC_PIPE_WAIT_FOR_OPEN); - if (IS_ERR(gss_auth->pipe[1])) { - err = PTR_ERR(gss_auth->pipe[1]); - goto err_put_mech; + gss_pipe = gss_pipe_alloc(clnt, "gssd", &gss_upcall_ops_v1); + if (IS_ERR(gss_pipe)) { + err = PTR_ERR(gss_pipe); + goto err_destroy_credcache; } + gss_auth->gss_pipe[1] = gss_pipe; - gss_auth->pipe[0] = rpc_mkpipe_data(&gss_upcall_ops_v0, - RPC_PIPE_WAIT_FOR_OPEN); - if (IS_ERR(gss_auth->pipe[0])) { - err = PTR_ERR(gss_auth->pipe[0]); + gss_pipe = gss_pipe_alloc(clnt, gss_auth->mech->gm_name, + &gss_upcall_ops_v0); + if (IS_ERR(gss_pipe)) { + err = PTR_ERR(gss_pipe); goto err_destroy_pipe_1; } - err = gss_pipes_dentries_create_net(clnt, auth); - if (err) - goto err_destroy_pipe_0; - err = rpcauth_init_credcache(auth); - if (err) - goto err_unlink_pipes; + gss_auth->gss_pipe[0] = gss_pipe; return auth; -err_unlink_pipes: - gss_pipes_dentries_destroy_net(clnt, auth); -err_destroy_pipe_0: - rpc_destroy_pipe_data(gss_auth->pipe[0]); err_destroy_pipe_1: - rpc_destroy_pipe_data(gss_auth->pipe[1]); + __gss_pipe_free(gss_auth->gss_pipe[1]); +err_destroy_credcache: + rpcauth_destroy_credcache(auth); err_put_mech: gss_mech_put(gss_auth->mech); err_put_net: @@ -963,9 +965,8 @@ gss_create(struct rpc_auth_create_args *args, struct rpc_clnt *clnt) static void gss_free(struct gss_auth *gss_auth) { - gss_pipes_dentries_destroy_net(gss_auth->client, &gss_auth->rpc_auth); - rpc_destroy_pipe_data(gss_auth->pipe[0]); - rpc_destroy_pipe_data(gss_auth->pipe[1]); + gss_pipe_free(gss_auth->gss_pipe[0]); + gss_pipe_free(gss_auth->gss_pipe[1]); gss_mech_put(gss_auth->mech); put_net(gss_auth->net); kfree(gss_auth->target_name); @@ -985,14 +986,18 @@ gss_free_callback(struct kref *kref) static void gss_destroy(struct rpc_auth *auth) { - struct gss_auth *gss_auth; + struct gss_auth *gss_auth = container_of(auth, + struct gss_auth, rpc_auth); dprintk("RPC: destroying GSS authenticator %p flavor %d\n", auth, auth->au_flavor); + gss_pipe_free(gss_auth->gss_pipe[0]); + gss_auth->gss_pipe[0] = NULL; + gss_pipe_free(gss_auth->gss_pipe[1]); + gss_auth->gss_pipe[1] = NULL; rpcauth_destroy_credcache(auth); - gss_auth = container_of(auth, struct gss_auth, rpc_auth); kref_put(&gss_auth->kref, gss_free_callback); } @@ -1676,8 +1681,6 @@ static const struct rpc_authops authgss_ops = { .destroy = gss_destroy, .lookup_cred = gss_lookup_cred, .crcreate = gss_create_cred, - .pipes_create = gss_pipes_dentries_create, - .pipes_destroy = gss_pipes_dentries_destroy, .list_pseudoflavors = gss_mech_list_pseudoflavors, .info2flavor = gss_mech_info2flavor, .flavor2info = gss_mech_flavor2info, -- GitLab