[Cluster-devel] Cluster Project branch, master, updated. gfs-kernel_0_1_22-57-g9941c55

[lhh at sourceware.org]

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- Log -----------------------------------------------------------------
commit 9941c556945e8e802738b2a700636293ec5696fd
Author: Lon Hohberger <lhh at redhat.com>
Date:   Tue Mar 4 17:24:15 2008 -0500

    [fence] Make fence_xvmd support reloading of key files on the fly.

-----------------------------------------------------------------------

Summary of changes:
 fence/agents/xvm/fence_xvm.c   |    2 +-
 fence/agents/xvm/fence_xvmd.c  |   31 +++++++++++++++++++++++++++++--
 fence/agents/xvm/simple_auth.c |    2 ++
 fence/agents/xvm/xvm.h         |    1 +
 4 files changed, 33 insertions(+), 3 deletions(-)

diff --git a/fence/agents/xvm/fence_xvm.c b/fence/agents/xvm/fence_xvm.c
index 4ce4693..8c8ce64 100644
--- a/fence/agents/xvm/fence_xvm.c
+++ b/fence/agents/xvm/fence_xvm.c
@@ -219,7 +219,7 @@ int
 fence_xen_domain(fence_xvm_args_t *args)
 {
 	ip_list_t ipl;
-	char key[4096];
+	char key[MAX_KEY_LEN];
 	int lfd, key_len = 0, fd;
 	int attempts = 0;
 	
diff --git a/fence/agents/xvm/fence_xvmd.c b/fence/agents/xvm/fence_xvmd.c
index 82f08f5..1280310 100644
--- a/fence/agents/xvm/fence_xvmd.c
+++ b/fence/agents/xvm/fence_xvmd.c
@@ -57,6 +57,7 @@
 #define LIBVIRT_XEN_URI "xen:///"
 
 static int running = 1;
+static int reload_key;
 
 
 int cleanup_xml(char *xmldesc, char **ret, size_t *retsz);
@@ -573,6 +574,27 @@ xvmd_loop(cman_handle_t ch, void *h, int fd, fence_xvm_args_t *args,
 			virConnectClose(vp);
 			vp = NULL;
 		}
+
+		if (reload_key) {
+			char temp_key[MAX_KEY_LEN];
+			int ret;
+
+			reload_key = 0;
+
+			ret = read_key_file(args->key_file, temp_key, sizeof(temp_key));
+			if (ret < 0) {
+				printf("Could not read %s; not updating key",
+					args->key_file);
+			} else {
+				memcpy(key, temp_key, MAX_KEY_LEN);
+				key_len = (size_t) ret;
+
+				if (args->auth == AUTH_NONE)
+					args->auth = AUTH_SHA256;
+				if (args->hash == HASH_NONE)
+					args->hash = HASH_SHA256;
+			}
+		}
 		
 		n = select(fd+1, &rfds, NULL, NULL, &tv);
 		if (n < 0)
@@ -678,6 +700,11 @@ sigint_handler(int sig)
 	running = 0;
 }
 
+void
+sighup_handler(int sig)
+{
+	reload_key = 1;
+}
 
 void malloc_dump_table(void);
 
@@ -687,7 +714,7 @@ main(int argc, char **argv)
 {
 	fence_xvm_args_t args;
 	int mc_sock;
-	char key[4096];
+	char key[MAX_KEY_LEN];
 	int key_len = 0, x;
 	char *my_options = "dfi:a:p:C:c:k:u?hLXV";
 	cman_handle_t ch = NULL;
@@ -780,7 +807,6 @@ main(int argc, char **argv)
 		if (x)
 			printf("Checkpoint initialized\n");
 	}
-
 	if (args.family == PF_INET)
 		mc_sock = ipv4_recv_sk(args.addr, args.port);
 	else
@@ -791,6 +817,7 @@ main(int argc, char **argv)
 	}
 
 
+	signal(SIGHUP, sighup_handler);
 	signal(SIGINT, sigint_handler);
 	signal(SIGTERM, sigint_handler);
 	signal(SIGQUIT, sigint_handler);
diff --git a/fence/agents/xvm/simple_auth.c b/fence/agents/xvm/simple_auth.c
index 0064e5c..7eb26ee 100644
--- a/fence/agents/xvm/simple_auth.c
+++ b/fence/agents/xvm/simple_auth.c
@@ -390,6 +390,8 @@ read_key_file(char *file, char *key, size_t max_len)
 	while (remain) {
 		nread = read(fd, p, remain);
 		if (nread < 0) {
+			if (errno == EINTR)
+				continue;
 			dbg_printf(2, "Error from read: %s\n", strerror(errno));
 			close(fd);
 			return -1;
diff --git a/fence/agents/xvm/xvm.h b/fence/agents/xvm/xvm.h
index bee9f3f..4272246 100644
--- a/fence/agents/xvm/xvm.h
+++ b/fence/agents/xvm/xvm.h
@@ -59,6 +59,7 @@ typedef enum {
 #define DEFAULT_TTL 4
 
 #define MAX_HASH_LENGTH SHA512_LENGTH
+#define MAX_KEY_LEN 4096
 
 typedef struct __attribute__ ((packed)) _fence_req {
 	uint8_t  request;		/* Fence request */


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