nfs: Add RPCv2 service

Signed-off-by: Shehjar Tikoo <shehjart@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 399 (NFS translator with Mount v3 and NFS v3 support)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=399

1 files changed, 391 insertions, 0 deletions

diff --git a/xlators/nfs/lib/src/rpcsvc-auth.c b/xlators/nfs/lib/src/rpcsvc-auth.c
new file mode 100644
index 000000000..38697965b
--- /dev/null
+++ b/xlators/nfs/lib/src/rpcsvc-auth.c
@@ -0,0 +1,391 @@
+/*
+  Copyright (c) 2010 Gluster, Inc. <http://www.gluster.com>
+  This file is part of GlusterFS.
+
+  GlusterFS is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published
+  by the Free Software Foundation; either version 3 of the License,
+  or (at your option) any later version.
+
+  GlusterFS is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see
+  <http://www.gnu.org/licenses/>.
+*/
+
+#include "rpcsvc.h"
+#include "logging.h"
+#include "dict.h"
+
+extern rpcsvc_auth_t *
+rpcsvc_auth_null_init (rpcsvc_t *svc, dict_t *options);
+
+extern rpcsvc_auth_t *
+rpcsvc_auth_unix_init (rpcsvc_t *svc, dict_t *options);
+
+int
+rpcsvc_auth_add_initer (struct list_head *list, char *idfier,
+                        rpcsvc_auth_initer_t init)
+{
+        struct rpcsvc_auth_list         *new = NULL;
+
+        if ((!list) || (!init) || (!idfier))
+                return -1;
+
+        new = CALLOC (1, sizeof (*new));
+        if (!new) {
+                gf_log (GF_RPCSVC, GF_LOG_ERROR, "Memory allocation failed");
+                return -1;
+        }
+
+        new->init = init;
+        strcpy (new->name, idfier);
+        INIT_LIST_HEAD (&new->authlist);
+        list_add_tail (&new->authlist, list);
+        return 0;
+}
+
+
+
+int
+rpcsvc_auth_add_initers (rpcsvc_t *svc)
+{
+        int     ret = -1;
+
+        ret = rpcsvc_auth_add_initer (&svc->authschemes, "auth-unix",
+                                      (rpcsvc_auth_initer_t)
+                                      rpcsvc_auth_unix_init);
+        if (ret == -1) {
+                gf_log (GF_RPCSVC, GF_LOG_ERROR, "Failed to add AUTH_UNIX");
+                goto err;
+        }
+
+        ret = rpcsvc_auth_add_initer (&svc->authschemes, "auth-null",
+                                      (rpcsvc_auth_initer_t)
+                                      rpcsvc_auth_null_init);
+        if (ret == -1) {
+                gf_log (GF_RPCSVC, GF_LOG_ERROR, "Failed to add AUTH_NULL");
+                goto err;
+        }
+
+        ret = 0;
+err:
+        return 0;
+}
+
+
+int
+rpcsvc_auth_init_auth (rpcsvc_t *svc, dict_t *options,
+                       struct rpcsvc_auth_list *authitem)
+{
+        int             ret = -1;
+
+        if ((!svc) || (!options) || (!authitem))
+                return -1;
+
+        if (!authitem->init) {
+                gf_log (GF_RPCSVC, GF_LOG_ERROR, "No init function defined");
+                ret = -1;
+                goto err;
+        }
+
+        authitem->auth = authitem->init (svc, options);
+        if (!authitem->auth) {
+                gf_log (GF_RPCSVC, GF_LOG_ERROR, "Registration of auth failed:"
+                        " %s", authitem->name);
+                ret = -1;
+                goto err;
+        }
+
+        authitem->enable = 1;
+        gf_log (GF_RPCSVC, GF_LOG_TRACE, "Authentication enabled: %s",
+                authitem->auth->authname);
+
+        ret = 0;
+err:
+        return ret;
+}
+
+
+int
+rpcsvc_auth_init_auths (rpcsvc_t *svc, dict_t *options)
+{
+        int                     ret = -1;
+        struct rpcsvc_auth_list *auth = NULL;
+        struct rpcsvc_auth_list *tmp = NULL;
+
+        if (!svc)
+                return -1;
+
+        if (list_empty (&svc->authschemes)) {
+                gf_log (GF_RPCSVC, GF_LOG_WARNING, "No authentication!");
+                ret = 0;
+                goto err;
+        }
+
+        /* If auth null and sys are not disabled by the user, we must enable
+         * it by default. This is a globally default rule, the user is still
+         * allowed to disable the two for particular subvolumes.
+         */
+        if (!dict_get (options, "rpc-auth.auth-null"))
+                ret = dict_set_dynstr (options, "rpc-auth.auth-null", "on");
+
+        if (!dict_get (options, "rpc-auth.auth-unix"))
+                ret = dict_set_dynstr (options, "rpc-auth.auth-unix", "on");
+
+        list_for_each_entry_safe (auth, tmp, &svc->authschemes, authlist) {
+                ret = rpcsvc_auth_init_auth (svc, options, auth);
+                if (ret == -1)
+                        goto err;
+        }
+
+        ret = 0;
+err:
+        return ret;
+
+}
+
+int
+rpcsvc_auth_init (rpcsvc_t *svc, dict_t *options)
+{
+        int             ret = -1;
+
+        if ((!svc) || (!options))
+                return -1;
+
+        ret = rpcsvc_auth_add_initers (svc);
+        if (ret == -1) {
+                gf_log (GF_RPCSVC, GF_LOG_ERROR, "Failed to add initers");
+                goto out;
+        }
+
+        ret = rpcsvc_auth_init_auths (svc, options);
+        if (ret == -1) {
+                gf_log (GF_RPCSVC, GF_LOG_ERROR, "Failed to init auth schemes");
+                goto out;
+        }
+
+out:
+        return ret;
+}
+
+
+rpcsvc_auth_t *
+__rpcsvc_auth_get_handler (rpcsvc_request_t *req)
+{
+        int                     ret = -1;
+        struct rpcsvc_auth_list *auth = NULL;
+        struct rpcsvc_auth_list *tmp = NULL;
+        rpcsvc_t                *svc = NULL;
+
+        if (!req)
+                return NULL;
+
+        svc = rpcsvc_request_service (req);
+        if (list_empty (&svc->authschemes)) {
+                gf_log (GF_RPCSVC, GF_LOG_WARNING, "No authentication!");
+                ret = 0;
+                goto err;
+        }
+
+        list_for_each_entry_safe (auth, tmp, &svc->authschemes, authlist) {
+                if (!auth->enable)
+                        continue;
+                if (auth->auth->authnum == req->cred.flavour)
+                        goto err;
+
+        }
+
+        auth = NULL;
+err:
+        if (auth)
+                return auth->auth;
+        else
+                return NULL;
+}
+
+rpcsvc_auth_t *
+rpcsvc_auth_get_handler (rpcsvc_request_t *req)
+{
+        rpcsvc_auth_t           *auth = NULL;
+
+        auth = __rpcsvc_auth_get_handler (req);
+        if (auth)
+                goto ret;
+
+        gf_log (GF_RPCSVC, GF_LOG_TRACE, "No auth handler: %d",
+                req->cred.flavour);
+
+        /* The requested scheme was not available so fall back the to one
+         * scheme that will always be present.
+         */
+        req->cred.flavour = AUTH_NULL;
+        req->verf.flavour = AUTH_NULL;
+        auth = __rpcsvc_auth_get_handler (req);
+ret:
+        return auth;
+}
+
+
+int
+rpcsvc_auth_request_init (rpcsvc_request_t *req)
+{
+        int                     ret = -1;
+        rpcsvc_auth_t           *auth = NULL;
+
+        if (!req)
+                return -1;
+
+        auth = rpcsvc_auth_get_handler (req);
+        if (!auth)
+                goto err;
+        ret = 0;
+        gf_log (GF_RPCSVC, GF_LOG_TRACE, "Auth handler: %s", auth->authname);
+        if (!auth->authops->request_init)
+                ret = auth->authops->request_init (req, auth->authprivate);
+
+err:
+        return ret;
+}
+
+
+int
+rpcsvc_authenticate (rpcsvc_request_t *req)
+{
+        int                     ret = RPCSVC_AUTH_REJECT;
+        rpcsvc_auth_t           *auth = NULL;
+        int                     minauth = 0;
+
+        if (!req)
+                return ret;
+
+        minauth = rpcsvc_request_prog_minauth (req);
+        if (minauth > rpcsvc_request_cred_flavour (req)) {
+                gf_log (GF_RPCSVC, GF_LOG_DEBUG, "Auth too weak");
+                rpcsvc_request_set_autherr (req, AUTH_TOOWEAK);
+                goto err;
+        }
+
+        auth = rpcsvc_auth_get_handler (req);
+        if (!auth) {
+                gf_log (GF_RPCSVC, GF_LOG_DEBUG, "No auth handler found");
+                goto err;
+        }
+
+        if (auth->authops->authenticate)
+                ret = auth->authops->authenticate (req, auth->authprivate);
+
+err:
+        return ret;
+}
+
+
+int
+rpcsvc_auth_array (rpcsvc_t *svc, char *volname, int *autharr, int arrlen)
+{
+        int             count = 0;
+        int             gen = RPCSVC_AUTH_REJECT;
+        int             spec = RPCSVC_AUTH_REJECT;
+        int             final = RPCSVC_AUTH_REJECT;
+        char            *srchstr = NULL;
+        char            *valstr = NULL;
+        gf_boolean_t    boolval = _gf_false;
+        int             ret = 0;
+
+        struct rpcsvc_auth_list *auth = NULL;
+        struct rpcsvc_auth_list *tmp = NULL;
+
+        if ((!svc) || (!autharr) || (!volname))
+                return -1;
+
+        memset (autharr, 0, arrlen * sizeof(int));
+        if (list_empty (&svc->authschemes)) {
+                gf_log (GF_RPCSVC, GF_LOG_ERROR, "No authentication!");
+                goto err;
+        }
+
+        list_for_each_entry_safe (auth, tmp, &svc->authschemes, authlist) {
+                if (count >= arrlen)
+                        break;
+
+                gen = asprintf (&srchstr, "rpc-auth.%s", auth->name);
+                if (gen == -1) {
+                        count = -1;
+                        goto err;
+                }
+
+                gen = RPCSVC_AUTH_REJECT;
+                if (dict_get (svc->options, srchstr)) {
+                        ret = dict_get_str (svc->options, srchstr, &valstr);
+                        if (ret == 0) {
+                                ret = gf_string2boolean (valstr, &boolval);
+                                if (ret == 0) {
+                                        if (boolval == _gf_true)
+                                                gen = RPCSVC_AUTH_ACCEPT;
+                                } else
+                                        gf_log (GF_RPCSVC, GF_LOG_ERROR, "Faile"
+                                                "d to read auth val");
+                        } else
+                                gf_log (GF_RPCSVC, GF_LOG_ERROR, "Faile"
+                                        "d to read auth val");
+                }
+
+                FREE (srchstr);
+                spec = asprintf (&srchstr, "rpc-auth.%s.%s", auth->name,
+                                 volname);
+                if (spec == -1) {
+                        count = -1;
+                        goto err;
+                }
+
+                spec = RPCSVC_AUTH_DONTCARE;
+                if (dict_get (svc->options, srchstr)) {
+                        ret = dict_get_str (svc->options, srchstr, &valstr);
+                        if (ret == 0) {
+                                ret = gf_string2boolean (valstr, &boolval);
+                                if (ret == 0) {
+                                        if (boolval == _gf_true)
+                                                spec = RPCSVC_AUTH_ACCEPT;
+                                        else
+                                                spec = RPCSVC_AUTH_REJECT;
+                                } else
+                                        gf_log (GF_RPCSVC, GF_LOG_ERROR, "Faile"
+                                                "d to read auth val");
+                        } else
+                                gf_log (GF_RPCSVC, GF_LOG_ERROR, "Faile"
+                                        "d to read auth val");
+                }
+
+                FREE (srchstr);
+                final = rpcsvc_combine_gen_spec_volume_checks (gen, spec);
+                if (final == RPCSVC_AUTH_ACCEPT) {
+                        autharr[count] = auth->auth->authnum;
+                        ++count;
+                }
+        }
+
+err:
+        return count;
+}
+
+
+gid_t *
+rpcsvc_auth_unix_auxgids (rpcsvc_request_t *req, int *arrlen)
+{
+        if ((!req) || (!arrlen))
+                return NULL;
+
+        if (req->cred.flavour != AUTH_UNIX)
+                return NULL;
+
+        *arrlen = req->auxgidcount;
+        if (*arrlen == 0)
+                return NULL;
+
+        return &req->auxgids[0];
+}
+