s3:winbind: Add async wb_seqnums

This is something that would have been very difficult with the old style of
async requests: Send the request to all children simultaneously.

diff --git a/source3/Makefile.in b/source3/Makefile.in
index 14bc86dbf78a6a8625d46311d39a2cee669b4ea2..61fde565c282bc6bdcc306262c3ac99478c4836d 100644 (file)
--- a/source3/Makefile.in
+++ b/source3/Makefile.in
@@ -1165,6 +1165,7 @@ WINBINDD_OBJ1 = \
                winbindd/wb_getpwsid.o \
                winbindd/wb_gettoken.o \
                winbindd/wb_seqnum.o \
+               winbindd/wb_seqnums.o \
                winbindd/winbindd_lookupsid.o \
                winbindd/winbindd_lookupname.o \
                winbindd/winbindd_sid_to_uid.o \

diff --git a/source3/winbindd/wb_seqnums.c b/source3/winbindd/wb_seqnums.c
new file mode 100644 (file)
index 0000000..f404433
--- /dev/null
+++ b/source3/winbindd/wb_seqnums.c
@@ -0,0 +1,133 @@
+/*
+   Unix SMB/CIFS implementation.
+   async seqnums
+   Copyright (C) Volker Lendecke 2009
+
+   This program 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.
+
+   This program 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 "includes.h"
+#include "winbindd.h"
+#include "librpc/gen_ndr/cli_wbint.h"
+
+struct wb_seqnums_state {
+       int num_domains;
+       int num_received;
+
+       struct tevent_req **subreqs;
+       struct winbindd_domain **domains;
+       NTSTATUS *stati;
+       uint32_t *seqnums;
+};
+
+static void wb_seqnums_done(struct tevent_req *subreq);
+
+struct tevent_req *wb_seqnums_send(TALLOC_CTX *mem_ctx,
+                                  struct tevent_context *ev)
+{
+       struct tevent_req *req;
+       struct wb_seqnums_state *state;
+       struct winbindd_domain *domain;
+       int i;
+
+       req = tevent_req_create(mem_ctx, &state, struct wb_seqnums_state);
+       if (req == NULL) {
+               return NULL;
+       }
+       state->num_received = 0;
+       state->num_domains = 0;
+
+       for (domain = domain_list(); domain != NULL; domain = domain->next) {
+               state->num_domains += 1;
+       }
+
+       state->subreqs = talloc_array(state, struct tevent_req *,
+                                     state->num_domains);
+       state->domains = talloc_array(state, struct winbindd_domain *,
+                                     state->num_domains);
+       state->stati = talloc_array(state, NTSTATUS, state->num_domains);
+       state->seqnums = talloc_array(state, uint32_t, state->num_domains);
+
+       if ((state->subreqs == NULL) || (state->domains == NULL) ||
+           (state->stati == NULL) || (state->seqnums == NULL)) {
+               tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
+               return tevent_req_post(req, ev);
+       }
+
+       i = 0;
+
+       for (domain = domain_list(); domain != NULL; domain = domain->next) {
+               state->domains[i] = domain;
+               state->subreqs[i] = wb_seqnum_send(state->subreqs, ev, domain);
+               if (tevent_req_nomem(state->subreqs[i], req)) {
+                       /* Don't even start all the other requests */
+                       TALLOC_FREE(state->subreqs);
+                       return tevent_req_post(req, ev);
+               }
+               tevent_req_set_callback(state->subreqs[i], wb_seqnums_done,
+                                       req);
+               i += 1;
+       }
+       return req;
+}
+
+static void wb_seqnums_done(struct tevent_req *subreq)
+{
+       struct tevent_req *req = tevent_req_callback_data(
+               subreq, struct tevent_req);
+       struct wb_seqnums_state *state = tevent_req_data(
+               req, struct wb_seqnums_state);
+       NTSTATUS status;
+       uint32_t seqnum;
+       int i;
+
+       status = wb_seqnum_recv(subreq, &seqnum);
+
+       for (i=0; i<state->num_domains; i++) {
+               if (subreq == state->subreqs[i]) {
+                       state->subreqs[i] = NULL;
+                       state->stati[i] = status;
+                       if (NT_STATUS_IS_OK(status)) {
+                               state->seqnums[i] = seqnum;
+                               state->domains[i]->sequence_number = seqnum;
+                       }
+                       break;
+               }
+       }
+       TALLOC_FREE(subreq);
+
+       state->num_received += 1;
+
+       if (state->num_received >= state->num_domains) {
+               tevent_req_done(req);
+       }
+}
+
+NTSTATUS wb_seqnums_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+                        int *num_domains, struct winbindd_domain ***domains,
+                        NTSTATUS **stati, uint32_t **seqnums)
+{
+       struct wb_seqnums_state *state = tevent_req_data(
+               req, struct wb_seqnums_state);
+       NTSTATUS status;
+
+       if (tevent_req_is_nterror(req, &status)) {
+               return status;
+       }
+       *num_domains = state->num_domains;
+       *domains = talloc_move(mem_ctx, &state->domains);
+       *stati = talloc_move(mem_ctx, &state->stati);
+       *seqnums = talloc_move(mem_ctx, &state->seqnums);
+       return NT_STATUS_OK;
+}

diff --git a/source3/winbindd/winbindd_proto.h b/source3/winbindd/winbindd_proto.h
index 1638b0be6297d66b8f26fe07e5b9e427ebbd3f28..a144c99c80f9f74a01c0bb1d9c7f2ed187924c67 100644 (file)
--- a/source3/winbindd/winbindd_proto.h
+++ b/source3/winbindd/winbindd_proto.h
@@ -772,5 +772,10 @@ struct tevent_req *wb_seqnum_send(TALLOC_CTX *mem_ctx,
                                  struct winbindd_domain *domain);
 NTSTATUS wb_seqnum_recv(struct tevent_req *req, uint32_t *seqnum);
 
+struct tevent_req *wb_seqnums_send(TALLOC_CTX *mem_ctx,
+                                  struct tevent_context *ev);
+NTSTATUS wb_seqnums_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+                        int *num_domains, struct winbindd_domain ***domains,
+                        NTSTATUS **stati, uint32_t **seqnums);
 
 #endif /*  _WINBINDD_PROTO_H_  */