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, 2017, 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 <linux/lustre/lustre_user.h>
  47
  48 #define PFID_STRIPE_IDX_BITS    16
  49 #define PFID_STRIPE_COUNT_MASK  ((1 << PFID_STRIPE_IDX_BITS) - 1)
  50
  51 #if __BYTE_ORDER == __BIG_ENDIAN
  52 static void lustre_swab_lu_fid(struct lu_fid *fid)
  53 {
  54         __swab64s(&fid->f_seq);
  55         __swab32s(&fid->f_oid);
  56         __swab32s(&fid->f_ver);
  57 }
  58
  59 static void lustre_loa_swab(struct lustre_ost_attrs *loa)
  60 {
  61         struct lustre_mdt_attrs *lma = &loa->loa_lma;
  62
  63         __swab32s(&lma->lma_compat);
  64         __swab32s(&lma->lma_incompat);
  65         lustre_swab_lu_fid(&lma->lma_self_fid);
  66         if (lma->lma_compat & LMAC_STRIPE_INFO) {
  67                 lustre_swab_lu_fid(&loa->loa_parent_fid);
  68                 __swab32s(&loa->loa_stripe_size);
  69         }
  70         if (lma->lma_compat & LMAC_COMP_INFO) {
  71                 __swab32s(&loa->loa_comp_id);
  72                 __swab64s(&loa->loa_comp_start);
  73                 __swab64s(&loa->loa_comp_end);
  74         }
  75 };
  76 #else
  77 static void lustre_loa_swab(struct lustre_ost_attrs *loa)
  78 {
  79 }
  80 #endif
  81
  82 int main(int argc, char *argv[])
  83 {
  84         int rc = 0;
  85         int i;
  86
  87         for (i = 1; i < argc; i++) {
  88                 char buf[1024]; /* allow xattr that may be larger */
  89                 struct filter_fid *ff = (void *)buf;
  90                 static int printed;
  91                 int size;
  92
  93                 size = getxattr(argv[i], "trusted.fid", buf,
  94                                 sizeof(struct filter_fid));
  95                 if (size < 0) {
  96                         if (errno == ENODATA) {
  97                                 struct lustre_ost_attrs *loa = (void *)buf;
  98                                 int rc1;
  99
 100                                 rc1 = getxattr(argv[i], "trusted.lma", loa,
 101                                                sizeof(*loa));
 102                                 if (rc1 < sizeof(*loa)) {
 103                                         fprintf(stderr,
 104                                                 "%s: error reading fid: %s\n",
 105                                                 argv[i], strerror(ENODATA));
 106                                         if (!rc)
 107                                                 rc = size;
 108                                         continue;
 109                                 }
 110
 111                                 lustre_loa_swab(loa);
 112                                 if (!(loa->loa_lma.lma_compat &
 113                                       LMAC_STRIPE_INFO)) {
 114                                         fprintf(stderr,
 115                                                 "%s: not stripe info: %s\n",
 116                                                 argv[i], strerror(ENODATA));
 117                                         if (!rc)
 118                                                 rc = size;
 119                                         continue;
 120                                 }
 121
 122                                 printf("%s: parent="DFID" stripe=%u "
 123                                        "stripe_size=%u stripe_count=%u",
 124                                        argv[i],
 125                                        (unsigned long long)loa->loa_parent_fid.f_seq,
 126                                        loa->loa_parent_fid.f_oid, 0, /* ver */
 127                                        loa->loa_parent_fid.f_stripe_idx &
 128                                                         PFID_STRIPE_COUNT_MASK,
 129                                        loa->loa_stripe_size,
 130                                        loa->loa_parent_fid.f_stripe_idx >>
 131                                                         PFID_STRIPE_IDX_BITS);
 132                                 if (loa->loa_comp_id != 0)
 133                                         printf(" component_id=%u "
 134                                                "component_start=%llu "
 135                                                "component_end=%llu",
 136                                                loa->loa_comp_id,
 137                                                loa->loa_comp_start,
 138                                                loa->loa_comp_end);
 139                                 printf("\n");
 140                                 continue;
 141                         }
 142
 143                         fprintf(stderr, "%s: error reading fid: %s\n",
 144                                 argv[i], strerror(errno));
 145                         if (!rc)
 146                                 rc = size;
 147                         continue;
 148                 }
 149
 150                 if (size != sizeof(struct filter_fid) &&
 151                     size != sizeof(struct filter_fid_18_23) &&
 152                     size != sizeof(struct filter_fid_24_29) &&
 153                     size != sizeof(struct filter_fid_210) && !printed) {
 154                         fprintf(stderr,
 155                                 "%s: warning: ffid size is unexpected (%d bytes), recompile?\n",
 156                                 argv[i], size);
 157                         printed = 1;
 158
 159                         if (size < sizeof(struct filter_fid_24_29))
 160                                 continue;
 161                 }
 162
 163                 printf("%s: ", argv[i]);
 164                 if (size == sizeof(struct filter_fid_18_23)) {
 165                         struct filter_fid_18_23 *ffo = (void *)buf;
 166
 167                         printf("objid=%llu seq=%llu ",
 168                                (unsigned long long)__le64_to_cpu(ffo->ff_objid),
 169                                (unsigned long long)__le64_to_cpu(ffo->ff_seq));
 170                 }
 171
 172                 printf("parent="DFID" stripe=%u",
 173                        (unsigned long long)__le64_to_cpu(ff->ff_parent.f_seq),
 174                        __le32_to_cpu(ff->ff_parent.f_oid), 0, /* ver */
 175                        /* this is stripe_nr actually */
 176                        __le32_to_cpu(ff->ff_parent.f_stripe_idx));
 177
 178                 if (size >= sizeof(struct filter_fid_210)) {
 179                         struct ost_layout *ol = &ff->ff_layout;
 180
 181                         /* new filter_fid, support PFL */
 182                         printf(" stripe_size=%u stripe_count=%u",
 183                                __le32_to_cpu(ol->ol_stripe_size),
 184                                __le32_to_cpu(ol->ol_stripe_count));
 185                         if (ol->ol_comp_id != 0)
 186                                 printf(" component_id=%u "
 187                                        "component_start=%llu "
 188                                        "component_end=%llu",
 189                                        __le32_to_cpu(ol->ol_comp_id),
 190                                        __le64_to_cpu(ol->ol_comp_start),
 191                                        __le64_to_cpu(ol->ol_comp_end));
 192                 }
 193                 if (size >= sizeof(struct filter_fid))
 194                         printf(" layout_version=%u range=%u",
 195                                __le32_to_cpu(ff->ff_layout_version),
 196                                __le32_to_cpu(ff->ff_range));
 197
 198                 printf("\n");
 199         }
 200
 201         return rc;
 202 }