+/* GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program 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
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see http://www.gnu.org/licenses
+ *
+ * Please visit http://www.xyratex.com/contact if you need additional
+ * information or have any questions.
+ *
+ * GPL HEADER END
+ */
+
+/*
+ * Copyright 2013 Xyratex Technology Limited
+ *
+ * Author: Artem Blagodarenko <Artem_Blagodarenko@xyratex.com>
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <unistd.h>
+#include <getopt.h>
+
+#ifndef HAVE_FIEMAP
+# include <linux/fiemap.h>
+#endif
+
+#ifdef __linux__
+# ifndef FS_IOC_FIEMAP
+# define FS_IOC_FIEMAP (_IOWR('f', 11, struct fiemap))
+# endif
+#endif
+
+#define ONEMB 1048576
+
+/* This test executes fiemap ioctl and check
+ * a) there are no file ranges marked with FIEMAP_EXTENT_UNWRITTEN
+ * b) data ranges sizes sum is equal to given in second param */
+int check_fiemap(int fd, long long orig_size)
+{
+ /* This buffer is enougth for 1MB length file */
+ union { struct fiemap f; char c[4096]; } fiemap_buf;
+ struct fiemap *fiemap = &fiemap_buf.f;
+ struct fiemap_extent *fm_extents = &fiemap->fm_extents[0];
+ unsigned int count = (sizeof(fiemap_buf) - sizeof(*fiemap)) /
+ sizeof(*fm_extents);
+ unsigned int i = 0;
+ long long file_size = 0;
+
+ memset(&fiemap_buf, 0, sizeof(fiemap_buf));
+
+ fiemap->fm_start = 0;
+ fiemap->fm_flags = FIEMAP_FLAG_SYNC;
+ fiemap->fm_extent_count = count;
+ fiemap->fm_length = FIEMAP_MAX_OFFSET;
+
+ if (ioctl(fd, FS_IOC_FIEMAP, fiemap) < 0) {
+ fprintf(stderr, "error while ioctl %i\n", errno);
+ return -1;
+ }
+
+ for (i = 0; i < fiemap->fm_mapped_extents; i++) {
+ printf("extent in "
+ "offset %lu, length %lu\n"
+ "flags: %x\n",
+ (unsigned long)fm_extents[i].fe_logical,
+ (unsigned long)fm_extents[i].fe_length,
+ fm_extents[i].fe_flags);
+
+ if (fm_extents[i].fe_flags & FIEMAP_EXTENT_UNWRITTEN) {
+ fprintf(stderr, "Unwritten extent\n");
+ return -2;
+ } else {
+ file_size += fm_extents[i].fe_length;
+ }
+ }
+
+ printf("No unwritten extents, extents number %u, "
+ "file size %lli, original size %lli\n",
+ fiemap->fm_mapped_extents,
+ file_size, orig_size);
+ return file_size != orig_size;
+}
+
+int main(int argc, char **argv)
+{
+ int c;
+ struct option long_opts[] = {
+ {"test", no_argument, 0, 't'},
+ {NULL, 0, NULL, 0}
+ };
+ int fd;
+ int rc;
+
+ optind = 0;
+ while ((c = getopt_long(argc, argv, "t", long_opts, NULL)) != -1) {
+ switch (c) {
+ case 't':
+ return 0;
+ default:
+ fprintf(stderr, "error: %s: option '%s' unrecognized\n",
+ argv[0], argv[optind - 1]);
+ return -1;
+ }
+ }
+
+ if (optind != argc - 2) {
+ fprintf(stderr, "Usage: %s <filename> <filesize>\n", argv[0]);
+ return -1;
+ }
+
+ fd = open(argv[optind], O_RDONLY);
+ if (fd < 0) {
+ fprintf(stderr, "cannot open %s for reading, error %i",
+ argv[optind], errno);
+ return -1;
+ }
+
+ fprintf(stderr, "fd: %i\n", fd);
+
+ rc = check_fiemap(fd, atoll(argv[optind + 1]));
+
+ if (close(fd) < 0)
+ fprintf(stderr, "closing %s, error %i", argv[optind], errno);
+
+ return rc;
+}
git://git.whamcloud.com / fs / lustre-release.git / commitdiff