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<div class="gmail_quote">On Fri, Sep 30, 2011 at 4:28 AM, MORITA Kazutaka <span dir="ltr">
<<a href="mailto:morita.kazutaka@lab.ntt.co.jp">morita.kazutaka@lab.ntt.co.jp</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex; border-left:1px #ccc solid; padding-left:1ex">
Signed-off-by: MORITA Kazutaka <<a href="mailto:morita.kazutaka@lab.ntt.co.jp">morita.kazutaka@lab.ntt.co.jp</a>><br>
---<br>
sheep/Makefile.am | 2 +-<br>
sheep/cluster/corosync.c | 260 ++++++++++++++++++++++++++++++++++++++++++++++<br>
sheep/group.c | 11 ++<br>
3 files changed, 272 insertions(+), 1 deletions(-)<br>
create mode 100644 sheep/cluster/corosync.c<br>
<br>
diff --git a/sheep/Makefile.am b/sheep/Makefile.am<br>
index 2f51702..ad92ea0 100644<br>
--- a/sheep/Makefile.am<br>
+++ b/sheep/Makefile.am<br>
@@ -23,7 +23,7 @@ INCLUDES = -I$(top_builddir)/include -I$(top_srcdir)/include $(libcpg_CFLAGS) $<br>
<br>
sbin_PROGRAMS = sheep<br>
<br>
-sheep_SOURCES = sheep.c group.c sdnet.c store.c vdi.c work.c<br>
+sheep_SOURCES = sheep.c group.c sdnet.c store.c vdi.c work.c cluster/corosync.c<br>
sheep_LDADD = $(libcpg_LIBS) $(libcfg_LIBS) ../lib/libsheepdog.a -lpthread<br>
sheep_DEPENDENCIES = ../lib/libsheepdog.a<br>
<br>
diff --git a/sheep/cluster/corosync.c b/sheep/cluster/corosync.c<br>
new file mode 100644<br>
index 0000000..735bee7<br>
--- /dev/null<br>
+++ b/sheep/cluster/corosync.c<br>
@@ -0,0 +1,260 @@<br>
+/*<br>
+ * Copyright (C) 2011 Nippon Telegraph and Telephone Corporation.<br>
+ *<br>
+ * This program is free software; you can redistribute it and/or<br>
+ * modify it under the terms of the GNU General Public License version<br>
+ * 2 as published by the Free Software Foundation.<br>
+ *<br>
+ * You should have received a copy of the GNU General Public License<br>
+ * along with this program. If not, see <<a href="http://www.gnu.org/licenses/" target="_blank">http://www.gnu.org/licenses/</a>>.<br>
+ */<br>
+#include <stdio.h><br>
+#include <unistd.h><br>
+#include <corosync/cpg.h><br>
+#include <corosync/cfg.h><br>
+<br>
+#include "cluster.h"<br>
+<br>
+static cpg_handle_t cpg_handle;<br>
+static struct cpg_name cpg_group = { 9, "sheepdog" };<br>
+<br>
+static corosync_cfg_handle_t cfg_handle;<br>
+<br>
+static struct cdrv_handlers corosync_handlers;<br>
+<br>
+static int nodeid_to_addr(uint32_t nodeid, uint8_t *addr)<br>
+{<br>
+ int ret, nr;<br>
+ corosync_cfg_node_address_t caddr;<br>
+ struct sockaddr_storage *ss = (struct sockaddr_storage *)caddr.address;<br>
+ struct sockaddr_in *sin = (struct sockaddr_in *)caddr.address;<br>
+ struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)caddr.address;<br>
+ void *saddr;<br>
+<br>
+ ret = corosync_cfg_get_node_addrs(cfg_handle, nodeid, 1, &nr, &caddr);<br>
+ if (ret != CS_OK) {<br>
+ vprintf(SDOG_ERR "failed to get addr %d\n", ret);<br>
+ return -1;<br>
+ }<br>
+<br>
+ if (!nr) {<br>
+ vprintf(SDOG_ERR "we got no address\n");<br>
+ return -1;<br>
+ }<br>
+<br>
+ if (ss->ss_family == AF_INET6) {<br>
+ saddr = &sin6->sin6_addr;<br>
+ memcpy(addr, saddr, 16);<br>
+ } else if (ss->ss_family == AF_INET) {<br>
+ saddr = &sin->sin_addr;<br>
+ memset(addr, 0, 16);<br>
+ memcpy(addr + 12, saddr, 4);<br>
+ } else {<br>
+ vprintf(SDOG_ERR "unknown protocol %d\n", ss->ss_family);<br>
+ return -1;<br>
+ }<br>
+<br>
+ return 0;<br>
+}<br>
+<br>
+static void cpg_addr_to_sheepid(const struct cpg_address *cpgs,<br>
+ struct sheepid *sheeps, size_t nr)<br>
+{<br>
+ int i;<br>
+<br>
+ for (i = 0; i < nr; i++) {<br>
+ nodeid_to_addr(cpgs[i].nodeid, sheeps[i].addr);<br>
+ sheeps[i].pid = cpgs[i].pid;<br>
+ }<br>
+}<br>
+<br>
+static void cdrv_cpg_deliver(cpg_handle_t handle,<br>
+ const struct cpg_name *group_name,<br>
+ uint32_t nodeid, uint32_t pid,<br>
+ void *msg, size_t msg_len)<br>
+{<br>
+ struct sheepid sender;<br>
+<br>
+ nodeid_to_addr(nodeid, sender.addr);<br>
+ sender.pid = pid;<br>
+<br>
+ corosync_handlers.notify_handler(&sender, msg, msg_len);<br>
+}<br>
+<br>
+static void cdrv_cpg_confchg(cpg_handle_t handle,<br>
+ const struct cpg_name *group_name,<br>
+ const struct cpg_address *member_list,<br>
+ size_t member_list_entries,<br>
+ const struct cpg_address *left_list,<br>
+ size_t left_list_entries,<br>
+ const struct cpg_address *joined_list,<br>
+ size_t joined_list_entries)<br>
+{<br>
+ int i;<br>
+ struct sheepid member_sheeps[SD_MAX_NODES];<br>
+ struct sheepid joined_sheeps[SD_MAX_NODES];<br>
+ struct sheepid left_sheeps[SD_MAX_NODES];<br>
+<br>
+ /* convert cpg_address to sheepid*/<br>
+ cpg_addr_to_sheepid(member_list, member_sheeps, member_list_entries);<br>
+ cpg_addr_to_sheepid(left_list, left_sheeps, left_list_entries);<br>
+ cpg_addr_to_sheepid(joined_list, joined_sheeps, joined_list_entries);<br>
+<br>
+ /* calculate a start member list */<br>
+ sheepid_del(member_sheeps, member_list_entries,<br>
+ joined_sheeps, joined_list_entries);<br>
+ member_list_entries -= joined_list_entries;<br>
+<br>
+ sheepid_add(member_sheeps, member_list_entries,<br>
+ left_sheeps, left_list_entries);<br>
+ member_list_entries += left_list_entries;<br>
+<br>
+ /* dispatch leave_handler */<br>
+ for (i = 0; i < left_list_entries; i++) {<br>
+ sheepid_del(member_sheeps, member_list_entries,<br>
+ left_sheeps + i, 1);<br>
+ member_list_entries--;<br>
+<br>
+ corosync_handlers.leave_handler(left_sheeps + i, member_sheeps,<br>
+ member_list_entries);<br>
+ }<br>
+<br>
+ /* dispatch join_handler */<br>
+ for (i = 0; i < joined_list_entries; i++) {<br>
+ sheepid_add(member_sheeps, member_list_entries,<br>
+ joined_sheeps, 1);<br>
+ member_list_entries++;<br>
+<br>
+ corosync_handlers.join_handler(joined_sheeps + i, member_sheeps,<br>
+ member_list_entries);<br>
+ }<br>
+}<br>
+<br>
+static int corosync_init(struct cdrv_handlers *handlers, struct sheepid *myid)<br>
+{<br>
+ int ret, fd;<br>
+ uint32_t nodeid;<br>
+ cpg_callbacks_t cb = {<br>
+ .cpg_deliver_fn = cdrv_cpg_deliver,<br>
+ .cpg_confchg_fn = cdrv_cpg_confchg<br>
+ };<br>
+<br>
+ corosync_handlers = *handlers;<br>
+<br>
+ ret = cpg_initialize(&cpg_handle, &cb);<br>
+ if (ret != CPG_OK) {<br>
+ eprintf("Failed to initialize cpg, %d\n", ret);<br>
+ eprintf("Is corosync running?\n");<br>
+ return -1;<br>
+ }<br>
+<br>
+ ret = corosync_cfg_initialize(&cfg_handle, NULL);<br>
+ if (ret != CS_OK) {<br>
+ vprintf(SDOG_ERR "failed to initiazize cfg %d\n", ret);<br>
+ return -1;<br>
+ }<br>
+<br>
+ ret = corosync_cfg_local_get(cfg_handle, &nodeid);<br>
+ if (ret != CS_OK) {<br>
+ vprintf(SDOG_ERR "failed to get nodeid %d\n", ret);<br>
+ return -1;<br>
+ }<br>
+<br>
+ ret = nodeid_to_addr(nodeid, myid->addr);<br>
+ if (ret < 0) {<br>
+ eprintf("failed to get local address\n");<br>
+ return -1;<br>
+ }<br>
+<br>
+ myid->pid = getpid();<br>
+<br>
+ ret = cpg_fd_get(cpg_handle, &fd);<br>
+ if (ret != CPG_OK) {<br>
+ eprintf("Failed to retrieve cpg file descriptor, %d\n", ret);<br>
+ return 1;<br>
</blockquote>
<div>here we can't return 1 anymore, the semanteme is changed </div>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex; border-left:1px #ccc solid; padding-left:1ex">
+ }<br>
+<br>
+ return fd;<br>
+}<br>
+<br>
+static int corosync_join(void)<br>
+{<br>
+ int ret;<br>
+retry:<br>
+ ret = cpg_join(cpg_handle, &cpg_group);<br>
+ switch (ret) {<br>
+ case CPG_OK:<br>
+ break;<br>
+ case CPG_ERR_TRY_AGAIN:<br>
+ dprintf("Failed to join the sheepdog group, try again\n");<br>
+ sleep(1);<br>
+ goto retry;<br>
+ case CPG_ERR_SECURITY:<br>
+ eprintf("Permission error.\n");<br>
+ return -1;<br>
+ default:<br>
+ eprintf("Failed to join the sheepdog group, %d\n", ret);<br>
+ return -1;<br>
+ }<br>
+<br>
+ return 0;<br>
+}<br>
+<br>
+static int corosync_leave(void)<br>
+{<br>
+ int ret;<br>
+<br>
+ ret = cpg_leave(cpg_handle, &cpg_group);<br>
+ if (ret != CPG_OK) {<br>
+ eprintf("failed to leave the sheepdog group\n, %d", ret);<br>
+ return -1;<br>
+ }<br>
+<br>
+ return 0;<br>
+}<br>
+<br>
+static int corosync_notify(void *msg, size_t msg_len)<br>
+{<br>
+ struct iovec iov;<br>
+ int ret;<br>
+<br>
+ iov.iov_base = msg;<br>
+ iov.iov_len = msg_len;<br>
+retry:<br>
+ ret = cpg_mcast_joined(cpg_handle, CPG_TYPE_AGREED, &iov, 1);<br>
+ switch (ret) {<br>
+ case CPG_OK:<br>
+ break;<br>
+ case CPG_ERR_TRY_AGAIN:<br>
+ dprintf("failed to send message. try again\n");<br>
+ sleep(1);<br>
+ goto retry;<br>
+ default:<br>
+ eprintf("failed to send message, %d\n", ret);<br>
+ return -1;<br>
+ }<br>
+ return 0;<br>
+}<br>
+<br>
+static int corosync_dispatch(void)<br>
+{<br>
+ int ret;<br>
+<br>
+ ret = cpg_dispatch(cpg_handle, CPG_DISPATCH_ALL);<br>
+ if (ret != CPG_OK)<br>
+ return -1;<br>
+<br>
+ return 0;<br>
+}<br>
+<br>
+struct cluster_driver cdrv_corosync = {<br>
+ .name = "corosync",<br>
+<br>
+ .init = corosync_init,<br>
+ .join = corosync_join,<br>
+ .leave = corosync_leave,<br>
+ .notify = corosync_notify,<br>
+ .dispatch = corosync_dispatch,<br>
</blockquote>
<div>is 'dispatch' operation really essential?</div>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex; border-left:1px #ccc solid; padding-left:1ex">
+};<br>
+<br>
+cdrv_register(cdrv_corosync);<br>
diff --git a/sheep/group.c b/sheep/group.c<br>
index 95fc799..f6743f5 100644<br>
--- a/sheep/group.c<br>
+++ b/sheep/group.c<br>
@@ -1890,12 +1890,23 @@ oom:<br>
int create_cluster(int port, int64_t zone)<br>
{<br>
int fd, ret;<br>
+ struct cluster_driver *cdrv;<br>
struct cdrv_handlers handlers = {<br>
.join_handler = sd_join_handler,<br>
.leave_handler = sd_leave_handler,<br>
.notify_handler = sd_notify_handler,<br>
};<br>
<br>
+ if (!sys->cdrv) {<br>
+ FOR_EACH_CLUSTER_DRIVER(cdrv) {<br>
+ if (strcmp(cdrv->name, "corosync") == 0) {<br>
+ dprintf("use corosync driver as default\n");<br>
+ sys->cdrv = cdrv;<br>
</blockquote>
<div>i think we'd better do a NULL pointer check for the driver's member.</div>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex; border-left:1px #ccc solid; padding-left:1ex">
+ break;<br>
+ }<br>
+ }<br>
+ }<br>
+<br>
fd = sys->cdrv->init(&handlers, &sys->this_sheepid);</blockquote>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex; border-left:1px #ccc solid; padding-left:1ex">
if (fd < 0)<br>
return -1;<br>
--<br>
1.7.2.5<br>
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