Bump version for release

This release fixes the handling of a server HTTP 304 response, now
treating it as non-fatal.

.gitignore

@@ -4,10 +4,12 @@ clr_debug_fuse
 clr_debug_daemon
 clr_debug_prepare
 .deps/
+.dirstamp
 Makefile
 Makefile.in
 aclocal.m4
 autom4te.cache/
+compile
 config.h
 config.h.in
 config.log
@@ -18,3 +20,5 @@ install-sh
 missing
 stamp-h1
 *.tar.gz
+tags
+cscope.*

Makefile.am

@@ -1,5 +1,9 @@
 EXTRA_DIST = COPYING clr_debug_fuse.service clr_debug_daemon.service debuginfo.conf
 
+DISTCHECK_CONFIGURE_FLAGS = \
+	--with-systemdsystemunitdir=$$dc_install_base/$(systemdsystemunitdir) \
+	--with-systemdtmpfilesdir=$$dc_install_base/$(tmpfilesdir)
+
 bin_PROGRAMS = clr_debug_fuse clr_debug_daemon clr_debug_prepare
 
 clr_debug_fuse_SOURCES = src/fuse.c src/client.c

configure.ac

@@ -2,7 +2,7 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ([2.66])
-AC_INIT(clr-debug-info, 11, arjan@linux.intel.com)
+AC_INIT(clr-debug-info, 23, arjan@linux.intel.com)
 AM_INIT_AUTOMAKE([foreign -Wall -W subdir-objects])
 AM_SILENT_RULES([yes])
 AC_PROG_CC
@@ -13,11 +13,19 @@ PKG_CHECK_MODULES([curl], [libcurl])
 PKG_CHECK_MODULES([fuse], [fuse])
 PKG_CHECK_MODULES([SYSTEMD], [systemd])
 
-tmpfilesdir=`pkg-config --variable tmpfilesdir systemd`
+dir=""
-AC_SUBST(tmpfilesdir)
+AC_ARG_WITH([systemdsystemunitdir], AS_HELP_STRING([--with-systemdsystemunitdir=DIR],
+	    [path to systemd system service dir @<:@default=/usr/lib/systemd/system@:>@]), [dir=${withval}],
+	    [dir="$($PKG_CONFIG --variable=systemdsystemunitdir systemd)"])
+test -z "${dir}" && dir=/usr/lib/systemd/system
+AC_SUBST(systemdsystemunitdir, [${dir}])
 
-systemdsystemunitdir=`pkg-config --variable systemdsystemunitdir systemd`
+dir=""
-AC_SUBST(systemdsystemunitdir)
+AC_ARG_WITH([systemdtmpfilesdir], AS_HELP_STRING([--with-systemdtmpfilesdir=DIR],
+	    [path to systemd tmpfiles dir @<:@default=/usr/lib/tmpfiles.d@:>@]), [dir=${withval}],
+	    [dir="$($PKG_CONFIG --variable=tmpfilesdir systemd)"])
+test -z "${dir}" && dir=/usr/lib/tmpfiles.d
+AC_SUBST(tmpfilesdir, [${dir}])
 
 AC_CONFIG_FILES([Makefile])
 AC_OUTPUT

src/fuse.c

@@ -34,6 +34,7 @@ Original copyright notice follows:
 #include <malloc.h>
 #include <fuse.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include <fcntl.h>

src/server.c

@@ -36,11 +36,15 @@
 #include <string.h>
 #include <pthread.h>
 #include <sys/stat.h>
+#include <malloc.h>
 
 #include <curl/curl.h>
 #include <glib.h>
 
-GStaticMutex dupes_mutex = G_STATIC_MUTEX_INIT;
+static GMutex dupes_mutex;
+
+char *urls[2] = {"https://debuginfo.clearlinux.org/debuginfo/", "http://debuginfo.fenrus.org/debuginfo/" };
+int urlcounter = 1;
 
 
 static GHashTable *hash;
@@ -49,7 +53,7 @@ static int avoid_dupes(const char *url)
 {
 	int retval = 0;
 	void *value;
-	g_static_mutex_lock(&dupes_mutex);
+	g_mutex_lock(&dupes_mutex);
 
 	if (hash == NULL)
 		hash = g_hash_table_new(g_str_hash, g_str_equal);
@@ -67,7 +71,7 @@ static int avoid_dupes(const char *url)
 		g_hash_table_replace(hash, strdup(url), data);
 	}
 
-	g_static_mutex_unlock(&dupes_mutex);
+	g_mutex_unlock(&dupes_mutex);
 	return retval;
 }
 
@@ -118,6 +122,15 @@ static int curl_get_file(const char *url, const char *prefix, time_t timestamp)
 	fflush(file);
 //	printf("HTTP return code is %i\n", ret);
 
+	/* HTTP 304 is returned if (a) the cached debuginfo has the same
+	 * timestamp or is newer than that on the server and (b) we haven't
+	 * already added the URL to the hash table. So, the first crash for a
+	 * boot may result in a 304 if the debuginfo had been downloaded in a
+	 * previous boot.
+	 */
+	if (ret != 200 && ret != 404 && ret != 304)
+		urlcounter++;
+
 	if (ret == 200) {
 		char *command = NULL;
 //		printf("Filename is %s\n", filename);
@@ -184,8 +197,16 @@ static void *server_thread(void *arg)
 	*path = 0;
 	path++;
 
+	/* GDB and elfutils both stat /usr/lib/debug directly when looking up
+	 * debuginfo, so avoid the download for "/.tar"; the associated cache
+	 * directories already exist by this point.
+	 */
+	if (strlen(path) == 1 && strcmp(path, "/") == 0) {
+		close(fd);
+		return NULL;
+	}
 
-	if (strstr(path, "..") || strstr(prefix, "..")) {
+	if (strstr(path, "..") || strstr(prefix, "..") || strstr(path, "'") || strstr(path, ";")) {
 		close(fd);
 		return NULL;
 	}
@@ -196,7 +217,7 @@ static void *server_thread(void *arg)
 		return NULL; 
 	}
 	url = NULL;
-	if (asprintf(&url, "http://debuginfo.clearlinux.org/debuginfo/%s%s.tar", prefix, path) < 0) {
+	if (asprintf(&url, "%s%s%s.tar", urls[urlcounter % 2], prefix, path) < 0) {
 		close(fd);
 		return NULL;
 	}
@@ -204,14 +225,28 @@ static void *server_thread(void *arg)
 //	printf("Getting url %s    %i:%06i\n", url, before.tv_sec, before.tv_usec);
 	ret = curl_get_file(url, prefix, timestamp);
 
-	/* tell the other side we're done with the download */
+	switch (ret) {
-	write(fd, "ok", 3);
+		case 200:
-	close(fd);
+		case 300:
+		case 304:
+		case 404:
+			// ignore these error codes
+			break;
+		default:
+			printf("Request for %s resulted in error %i\n", url, ret);
+			break;
+	}
 
 	gettimeofday(&after, NULL);
 	if (timedelta(before, after) > 0.6) 
 		printf("Request for %s took %5.2f seconds (%i - %i)\n", url,
 			after.tv_sec - before.tv_sec + (1.0*after.tv_usec - before.tv_usec) / 1000000.0, ret, (int)timestamp);
+
+	/* tell the other side we're done with the download */
+	write(fd, "ok", 3);
+	close(fd);
+
+			
 	free(url);
 	return NULL;
 }
@@ -259,8 +294,9 @@ int main(int argc, char **argv)
 		int clientsock;
 		pthread_t thread;
 
+		malloc_trim(0);
 		clientsock = accept(sockfd, NULL, NULL);
-		
+
 		if (!curl_done) {
 			curl_global_init(CURL_GLOBAL_ALL);
 			curl_done = 1;