lustre/utils/ll_decode_filter_fid.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2014, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/utils/ll_decode_filter_fid.c
  33  *
  34  * Tool for printing the OST filter_fid structure on the objects
  35  * in human readable form.
  36  *
  37  * Author: Andreas Dilger <adilger@sun.com>
  38  */
  39
  40
  41 #include <stdio.h>
  42 #include <errno.h>
  43 #include <sys/types.h>
  44 #include <sys/xattr.h>
  45 #include <asm/byteorder.h>
  46 #include <lustre/lustre_user.h>
  47
  48 int main(int argc, char *argv[])
  49 {
  50         int rc = 0;
  51         int i;
  52
  53         for (i = 1; i < argc; i++) {
  54                 char buf[1024]; /* allow xattr that may be larger */
  55                 struct filter_fid *ff = (void *)buf;
  56                 int size;
  57
  58                 size = getxattr(argv[i], "trusted.fid", buf,
  59                                 sizeof(struct filter_fid_old));
  60                 if (size < 0) {
  61                         fprintf(stderr, "%s: error reading fid: %s\n",
  62                                 argv[i], strerror(errno));
  63                         if (rc == 0)
  64                                 rc = size;
  65                         continue;
  66                 }
  67                 if (size > sizeof(struct filter_fid_old)) {
  68                         fprintf(stderr, "%s: warning: fid larger than expected"
  69                                 " (%d bytes), recompile?\n", argv[i], size);
  70                 } else if (size > sizeof(*ff)) {
  71                         struct filter_fid_old *ffo = (void *)buf;
  72
  73                         /* old filter_fid */
  74                         printf("%s: objid=%llu seq=%llu parent="DFID
  75                                " stripe=%u\n", argv[i],
  76                                (unsigned long long)__le64_to_cpu(ffo->ff_objid),
  77                                (unsigned long long)__le64_to_cpu(ffo->ff_seq),
  78                                (unsigned long long)__le64_to_cpu(ffo->ff_parent.f_seq),
  79                                le32toh(ffo->ff_parent.f_oid), 0 /* ver */,
  80                                /* this is stripe_nr actually */
  81                                le32toh(ffo->ff_parent.f_stripe_idx));
  82                 } else {
  83                         printf("%s: parent="DFID" stripe=%u\n", argv[i],
  84                                (unsigned long long)__le64_to_cpu(ff->ff_parent.f_seq),
  85                                __le32_to_cpu(ff->ff_parent.f_oid), 0, /* ver */
  86                                /* this is stripe_nr actually */
  87                                __le32_to_cpu(ff->ff_parent.f_stripe_idx));
  88                 }
  89         }
  90
  91         return rc;
  92 }