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-rw-r--r--src/readahead/readahead-analyze.c141
1 files changed, 141 insertions, 0 deletions
diff --git a/src/readahead/readahead-analyze.c b/src/readahead/readahead-analyze.c
new file mode 100644
index 0000000000..6ee355146a
--- /dev/null
+++ b/src/readahead/readahead-analyze.c
@@ -0,0 +1,141 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2012 Auke Kok <auke-jan.h.kok@intel.com>
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <inttypes.h>
+#include <linux/limits.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <string.h>
+
+#include "readahead-common.h"
+
+
+int main(int argc, char *argv[])
+{
+ char line[1024];
+ char path[PATH_MAX];
+ FILE *pack;
+ int a;
+ int missing = 0;
+ off_t size;
+ long tsize = 0;
+ uint64_t inode;
+ uint32_t b;
+ uint32_t c;
+ struct stat st;
+ int pagesize = getpagesize();
+
+ if (argc != 2)
+ snprintf(path, PATH_MAX, "/.readahead");
+ else
+ snprintf(path, PATH_MAX, "%s", argv[1]);
+
+ pack = fopen(path, "r");
+ if (!pack) {
+ fprintf(stderr, "Pack file missing\n");
+ exit(EXIT_FAILURE);
+ }
+
+ if (!(fgets(line, sizeof(line), pack))) {
+ fprintf(stderr, "Pack file corrupt\n");
+ exit(EXIT_FAILURE);
+ }
+
+ if (!strstr(line, READAHEAD_PACK_FILE_VERSION)) {
+ fprintf(stderr, "Pack file version incompatible with this parser\n");
+ exit(EXIT_FAILURE);
+ }
+
+ if ((a = getc(pack)) == EOF) {
+ fprintf(stderr, "Pack file corrupt\n");
+ exit(EXIT_FAILURE);
+ }
+
+ fprintf(stdout, " pct sections size: path\n");
+ fprintf(stdout, " === ======== ====: ====\n");
+
+ while(true) {
+ int pages = 0;
+ int sections = 0;
+
+ if (!fgets(path, sizeof(path), pack))
+ break; /* done */
+
+ path[strlen(path)-1] = 0;
+
+ if (fread(&inode, sizeof(inode), 1, pack) != 1) {
+ fprintf(stderr, "Pack file corrupt\n");
+ exit(EXIT_FAILURE);
+ }
+
+ while (true) {
+ if (fread(&b, sizeof(b), 1, pack) != 1 ||
+ fread(&c, sizeof(c), 1, pack) != 1) {
+ fprintf(stderr, "Pack file corrupt\n");
+ exit(EXIT_FAILURE);
+ }
+ if ((b == 0) && (c == 0))
+ break;
+
+ /* Uncomment this to get all the chunks separately
+ fprintf(stdout, " %d: %d %d\n", sections, b, c);
+ */
+
+ pages += (c - b);
+ sections++;
+ }
+
+ if (stat(path, &st) == 0) {
+ if (sections == 0)
+ size = st.st_size;
+ else
+ size = pages * pagesize;
+
+ tsize += size;
+
+ fprintf(stdout, " %4d%% (%2d) %12ld: %s\n",
+ sections ? (int)(size / st.st_size * 100.0) : 100,
+ sections ? sections : 1,
+ (unsigned long)size,
+ path);
+ } else {
+ fprintf(stdout, " %4dp (%2d) %12s: %s (MISSING)\n",
+ sections ? pages : -1,
+ sections ? sections : 1,
+ "???",
+ path);
+ missing++;
+ }
+
+ }
+
+ fprintf(stdout, "\nHOST: %s", line);
+ fprintf(stdout, "TYPE: %c\n", a);
+ fprintf(stdout, "MISSING: %d\n", missing);
+ fprintf(stdout, "TOTAL: %ld\n", tsize);
+
+ exit(EXIT_SUCCESS);
+}