Adding upstream version 1:2.6.4.upstream/1%2.6.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 196 insertions, 0 deletions

diff --git a/support/reexport/fsidd.c b/support/reexport/fsidd.c
new file mode 100644
index 0000000..3e62b3f
--- /dev/null
+++ b/support/reexport/fsidd.c
@@ -0,0 +1,196 @@
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <assert.h>
+#ifdef HAVE_DLFCN_H
+#include <dlfcn.h>
+#endif
+#include <event2/event.h>
+
+#include "conffile.h"
+#include "reexport_backend.h"
+#include "reexport.h"
+#include "xcommon.h"
+#include "xlog.h"
+
+static struct event_base *evbase;
+static struct reexpdb_backend_plugin *dbbackend = &sqlite_plug_ops;
+
+/* assert_safe() always evalutes it argument, as it might have
+ * a side-effect.  assert() won't if compiled with NDEBUG
+ */
+#define assert_safe(__sideeffect) (__sideeffect ? 0 : ({assert(0) ; 0;}))
+
+static void client_cb(evutil_socket_t cl, short ev, void *d)
+{
+	struct event *me = d;
+	char buf[PATH_MAX * 2];
+	int n;
+
+	(void)ev;
+
+	n = recv(cl, buf, sizeof(buf) - 1, 0);
+	if (n <= 0) {
+		event_del(me);
+		event_free(me);
+		close(cl);
+		return;
+	}
+
+	buf[n] = '\0';
+
+	if (strncmp(buf, "get_fsidnum ", strlen("get_fsidnum ")) == 0) {
+		char *req_path = buf + strlen("get_fsidnum ");
+		uint32_t fsidnum;
+		char *answer = NULL;
+		bool found;
+
+		assert(req_path < buf + n );
+
+		printf("client asks for %s\n", req_path);
+
+		if (dbbackend->fsidnum_by_path(req_path, &fsidnum, false, &found)) {
+			if (found)
+				assert_safe(asprintf(&answer, "+ %u", fsidnum) != -1);
+			else
+				assert_safe(asprintf(&answer, "+ ") != -1);
+		} else {
+			assert_safe(asprintf(&answer, "- %s", "Command failed") != -1);
+		}
+
+		(void)send(cl, answer, strlen(answer), 0);
+
+		free(answer);
+	} else if (strncmp(buf, "get_or_create_fsidnum ", strlen("get_or_create_fsidnum ")) == 0) {
+		char *req_path = buf + strlen("get_or_create_fsidnum ");
+		uint32_t fsidnum;
+		char *answer = NULL;
+		bool found;
+
+		assert(req_path < buf + n );
+
+
+		if (dbbackend->fsidnum_by_path(req_path, &fsidnum, true, &found)) {
+			if (found) {
+				assert_safe(asprintf(&answer, "+ %u", fsidnum) != -1);
+			} else {
+				assert_safe(asprintf(&answer, "+ ") != -1);
+			}
+		
+		} else {
+			assert_safe(asprintf(&answer, "- %s", "Command failed") != -1);
+		}
+
+		(void)send(cl, answer, strlen(answer), 0);
+
+		free(answer);
+	} else if (strncmp(buf, "get_path ", strlen("get_path ")) == 0) {
+		char *req_fsidnum = buf + strlen("get_path ");
+		char *path = NULL, *answer = NULL, *endp;
+		bool bad_input = true;
+		uint32_t fsidnum;
+		bool found;
+
+		assert(req_fsidnum < buf + n );
+
+		errno = 0;
+		fsidnum = strtoul(req_fsidnum, &endp, 10);
+		if (errno == 0 && *endp == '\0') {
+			bad_input = false;
+		}
+
+		if (bad_input) {
+			assert_safe(asprintf(&answer, "- %s", "Command failed: Bad input") != -1);
+		} else {
+			if (dbbackend->path_by_fsidnum(fsidnum, &path, &found)) {
+				if (found)
+					assert_safe(asprintf(&answer, "+ %s", path) != -1);
+				else
+					assert_safe(asprintf(&answer, "+ ") != -1);
+			} else {
+				assert_safe(asprintf(&answer, "+ ") != -1);
+			}
+		}
+
+		(void)send(cl, answer, strlen(answer), 0);
+
+		free(path);
+		free(answer);
+	} else if (strcmp(buf, "version") == 0) {
+		char answer[] = "+ 1";
+
+		(void)send(cl, answer, strlen(answer), 0);
+	} else {
+		char *answer = NULL;
+
+		assert_safe(asprintf(&answer, "- bad command") != -1);
+		(void)send(cl, answer, strlen(answer), 0);
+
+		free(answer);
+	}
+}
+
+static void srv_cb(evutil_socket_t fd, short ev, void *d)
+{
+	int cl = accept4(fd, NULL, NULL, SOCK_NONBLOCK);
+	struct event *client_ev;
+	
+	(void)ev;
+	(void)d;
+
+	client_ev = event_new(evbase, cl, EV_READ | EV_PERSIST | EV_CLOSED, client_cb, event_self_cbarg());
+	event_add(client_ev, NULL);
+}
+
+int main(void)
+{
+	struct event *srv_ev;
+	struct sockaddr_un addr;
+	char *sock_file;
+	int srv;
+
+	conf_init_file(NFS_CONFFILE);
+
+	if (!dbbackend->initdb()) {
+		return 1;
+	}
+
+	sock_file = conf_get_str_with_def("reexport", "fsidd_socket", FSID_SOCKET_NAME);
+
+	memset(&addr, 0, sizeof(struct sockaddr_un));
+	addr.sun_family = AF_UNIX;
+	strncpy(addr.sun_path, sock_file, sizeof(addr.sun_path) - 1);
+	if (addr.sun_path[0] == '@')
+		/* "abstract" socket namespace */
+		addr.sun_path[0] = 0;
+	else
+		unlink(sock_file);
+
+	srv = socket(AF_UNIX, SOCK_SEQPACKET | SOCK_NONBLOCK, 0);
+	if (srv == -1) {
+		xlog(L_WARNING, "Unable to create AF_UNIX socket for %s: %m\n", sock_file);
+		return 1;
+	}
+
+	if (bind(srv, (const struct sockaddr *)&addr, sizeof(struct sockaddr_un)) == -1) {
+		xlog(L_WARNING, "Unable to bind %s: %m\n", sock_file);
+		return 1;
+	}
+
+	if (listen(srv, 5) == -1) {
+		xlog(L_WARNING, "Unable to listen on %s: %m\n", sock_file);
+		return 1;
+	}
+
+	evbase = event_base_new();
+
+	srv_ev = event_new(evbase, srv, EV_READ | EV_PERSIST, srv_cb, NULL);
+	event_add(srv_ev, NULL);
+
+	event_base_dispatch(evbase);
+
+	dbbackend->destroydb();
+
+	return 0;
+}