Make storage backend selectable via environment variable.

[bluesky.git] / nfs3 / rpc.c

diff --git a/nfs3/rpc.c b/nfs3/rpc.c
index 2c640d7..465bcd3 100644 (file)
--- a/nfs3/rpc.c
+++ b/nfs3/rpc.c
@@ -18,6 +18,7 @@
 #include <stdlib.h>
 #include <rpc/pmap_clnt.h>
 #include <string.h>
+#include <signal.h>
 #include <memory.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
@@ -121,68 +122,6 @@ struct rpc_fail_reply {
     uint32_t accept_stat;
 };
 
-/* Routines for XDR-encoding to a growable string. */
-static bool_t xdr_string_putlong(XDR *xdrs, const long *lp)
-{
-    GString *str = (GString *)xdrs->x_private;
-    uint32_t data = htonl(*lp);
-    g_string_set_size(str, str->len + 4);
-    memcpy(str->str + str->len - 4, &data, 4);
-    return TRUE;
-}
-
-static bool_t xdr_string_putbytes(XDR *xdrs, const char *addr, u_int len)
-{
-    GString *str = (GString *)xdrs->x_private;
-    g_string_set_size(str, str->len + len);
-    memcpy(str->str + str->len - len, addr, len);
-    return TRUE;
-}
-
-static u_int xdr_string_getpos(const XDR *xdrs)
-{
-    GString *str = (GString *)xdrs->x_private;
-    return str->len;
-}
-
-static bool_t xdr_string_putint32(XDR *xdrs, const int32_t *ip)
-{
-    GString *str = (GString *)xdrs->x_private;
-    uint32_t data = htonl(*ip);
-    g_string_set_size(str, str->len + 4);
-    memcpy(str->str + str->len - 4, &data, 4);
-    return TRUE;
-}
-
-static int32_t *xdr_string_inline(XDR *xdrs, u_int len)
-{
-    GString *str = (GString *)xdrs->x_private;
-    g_string_set_size(str, str->len + len);
-    return (int32_t *)(str->str + str->len - len);
-}
-
-static void xdr_string_destroy(XDR *xdrs)
-{
-}
-
-static struct xdr_ops xdr_string_ops = {
-    .x_putlong = xdr_string_putlong,
-    .x_putbytes = xdr_string_putbytes,
-    .x_getpostn = xdr_string_getpos,
-    .x_putint32 = xdr_string_putint32,
-    .x_inline = xdr_string_inline,
-    .x_destroy = xdr_string_destroy,
-};
-
-static void xdr_string_create(XDR *xdrs, GString *string, enum xdr_op op)
-{
-    xdrs->x_op = op;
-    xdrs->x_ops = &xdr_string_ops;
-    xdrs->x_private = (char *)string;
-    xdrs->x_base = NULL;
-    xdrs->x_handy = 0;
-}
-
 static void
 async_rpc_send_failure(RPCRequest *req, enum accept_stat stat)
 {
@@ -518,8 +457,22 @@ static GMainLoop *main_loop;
 
 static GThreadPool *rpc_thread_pool;
 
+static volatile int fs_dump_requested = 0;
+
+static void sig_handler(int sig)
+{
+    if (sig == SIGUSR1) {
+        fs_dump_requested = 1;
+    }
+}
+
 static gboolean async_flushd(gpointer data)
 {
+    if (fs_dump_requested) {
+        bluesky_debug_dump(fs);
+        fs_dump_requested = 0;
+    }
+
     bluesky_flushd_invoke(fs);
     return TRUE;
 }
@@ -541,6 +494,15 @@ static async_rpc_init()
     g_source_set_callback(source, async_flushd, NULL, NULL);
     g_source_attach(source, main_context);
     g_source_unref(source);
+
+    /* Signal USR1 is used to request a debugging dump of filesyste info */
+    struct sigaction sa;
+    sa.sa_handler = sig_handler;
+    sigemptyset(&sa.sa_mask);
+    sa.sa_flags = SA_RESTART;
+    if (sigaction(SIGUSR1, &sa, NULL) < 0) {
+        perror("sigaction");
+    }
 }
 
 struct rpc_call_header {
@@ -622,7 +584,11 @@ static gboolean async_rpc_dispatch(RPCConnection *rpc)
     req->req_proc = ntohl(header->proc);
     rpc->msgbuf = g_string_new("");
 
-    g_thread_pool_push(rpc_thread_pool, req, NULL);
+    if (bluesky_options.sync_frontends) {
+        nfs_program_3(req);
+    } else {
+        g_thread_pool_push(rpc_thread_pool, req, NULL);
+    }
 
     return TRUE;
 }