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  *
  31  * lustre/utils/ll_decode_filter_fid.c
  32  *
  33  * Tool for printing the OST filter_fid structure on the objects
  34  * in human readable form.
  35  *
  36  * Author: Andreas Dilger <adilger@sun.com>
  37  */
  38
  39
  40 #include <stdio.h>
  41 #include <errno.h>
  42 #include <sys/types.h>
  43 #include <sys/xattr.h>
  44 #include <asm/byteorder.h>
  45 #include <linux/lustre/lustre_user.h>
  46
  47 #if __BYTE_ORDER == __BIG_ENDIAN
  48 static void lustre_swab_lu_fid(struct lu_fid *fid)
  49 {
  50         __swab64s(&fid->f_seq);
  51         __swab32s(&fid->f_oid);
  52         __swab32s(&fid->f_ver);
  53 }
  54
  55 static void lustre_loa_swab(struct lustre_ost_attrs *loa)
  56 {
  57         struct lustre_mdt_attrs *lma = &loa->loa_lma;
  58
  59         __swab32s(&lma->lma_compat);
  60         __swab32s(&lma->lma_incompat);
  61         lustre_swab_lu_fid(&lma->lma_self_fid);
  62         if (lma->lma_compat & LMAC_STRIPE_INFO) {
  63                 lustre_swab_lu_fid(&loa->loa_parent_fid);
  64                 __swab32s(&loa->loa_stripe_size);
  65         }
  66         if (lma->lma_compat & LMAC_COMP_INFO) {
  67                 __swab32s(&loa->loa_comp_id);
  68                 __swab64s(&loa->loa_comp_start);
  69                 __swab64s(&loa->loa_comp_end);
  70         }
  71 };
  72 #else
  73 static void lustre_loa_swab(struct lustre_ost_attrs *loa)
  74 {
  75 }
  76 #endif
  77
  78 int main(int argc, char *argv[])
  79 {
  80         int rc = 0;
  81         int i;
  82
  83         for (i = 1; i < argc; i++) {
  84                 char buf[1024]; /* allow xattr that may be larger */
  85                 struct filter_fid *ff = (void *)buf;
  86                 static int printed;
  87                 int size;
  88
  89                 size = getxattr(argv[i], "trusted.fid", buf,
  90                                 sizeof(struct filter_fid));
  91                 if (size < 0) {
  92                         if (errno == ENODATA) {
  93                                 struct lustre_ost_attrs *loa = (void *)buf;
  94                                 int rc1;
  95
  96                                 rc1 = getxattr(argv[i], "trusted.lma", loa,
  97                                                sizeof(*loa));
  98                                 if (rc1 < sizeof(*loa)) {
  99                                         fprintf(stderr,
 100                                                 "%s: error reading fid: %s\n",
 101                                                 argv[i], strerror(ENODATA));
 102                                         if (!rc)
 103                                                 rc = size;
 104                                         continue;
 105                                 }
 106
 107                                 lustre_loa_swab(loa);
 108                                 if (!(loa->loa_lma.lma_compat &
 109                                       LMAC_STRIPE_INFO)) {
 110                                         fprintf(stderr,
 111                                                 "%s: not stripe info: %s\n",
 112                                                 argv[i], strerror(ENODATA));
 113                                         if (!rc)
 114                                                 rc = size;
 115                                         continue;
 116                                 }
 117
 118                                 printf("%s: parent="DFID" stripe=%u "
 119                                        "stripe_size=%u stripe_count=%u",
 120                                        argv[i],
 121                                        (unsigned long long)loa->loa_parent_fid.f_seq,
 122                                        loa->loa_parent_fid.f_oid, 0, /* ver */
 123                                        loa->loa_parent_fid.f_stripe_idx &
 124                                                         PFID_STRIPE_COUNT_MASK,
 125                                        loa->loa_stripe_size,
 126                                        loa->loa_parent_fid.f_stripe_idx >>
 127                                                         PFID_STRIPE_IDX_BITS);
 128                                 if (loa->loa_comp_id != 0)
 129                                         printf(" component_id=%u "
 130                                                "component_start=%llu "
 131                                                "component_end=%llu",
 132                                                loa->loa_comp_id,
 133                                                (unsigned long long)loa->loa_comp_start,
 134                                                (unsigned long long)loa->loa_comp_end);
 135                                 printf("\n");
 136                                 continue;
 137                         }
 138
 139                         fprintf(stderr, "%s: error reading fid: %s\n",
 140                                 argv[i], strerror(errno));
 141                         if (!rc)
 142                                 rc = size;
 143                         continue;
 144                 }
 145
 146                 if (size != sizeof(struct filter_fid) &&
 147                     size != sizeof(struct filter_fid_18_23) &&
 148                     size != sizeof(struct filter_fid_24_29) &&
 149                     size != sizeof(struct filter_fid_210) && !printed) {
 150                         fprintf(stderr,
 151                                 "%s: warning: ffid size is unexpected (%d bytes), recompile?\n",
 152                                 argv[i], size);
 153                         printed = 1;
 154
 155                         if (size < sizeof(struct filter_fid_24_29))
 156                                 continue;
 157                 }
 158
 159                 printf("%s: ", argv[i]);
 160                 if (size == sizeof(struct filter_fid_18_23)) {
 161                         struct filter_fid_18_23 *ffo = (void *)buf;
 162
 163                         printf("objid=%llu seq=%llu ",
 164                                (unsigned long long)__le64_to_cpu(ffo->ff_objid),
 165                                (unsigned long long)__le64_to_cpu(ffo->ff_seq));
 166                 }
 167
 168                 printf("parent="DFID" stripe=%u",
 169                        (unsigned long long)__le64_to_cpu(ff->ff_parent.f_seq),
 170                        __le32_to_cpu(ff->ff_parent.f_oid), 0, /* ver */
 171                        /* this is stripe_nr actually */
 172                        __le32_to_cpu(ff->ff_parent.f_stripe_idx));
 173
 174                 if (size >= sizeof(struct filter_fid_210)) {
 175                         struct ost_layout *ol = &ff->ff_layout;
 176
 177                         /* new filter_fid, support PFL */
 178                         printf(" stripe_size=%u stripe_count=%u",
 179                                __le32_to_cpu(ol->ol_stripe_size),
 180                                __le32_to_cpu(ol->ol_stripe_count));
 181                         if (ol->ol_comp_id != 0)
 182                                 printf(" component_id=%u "
 183                                        "component_start=%llu "
 184                                        "component_end=%llu",
 185                                        __le32_to_cpu(ol->ol_comp_id),
 186                                        (unsigned long long)
 187                                        __le64_to_cpu(ol->ol_comp_start),
 188                                        (unsigned long long)
 189                                        __le64_to_cpu(ol->ol_comp_end));
 190                 }
 191                 if (size >= sizeof(struct filter_fid))
 192                         printf(" layout_version=%u range=%u",
 193                                __le32_to_cpu(ff->ff_layout_version),
 194                                __le32_to_cpu(ff->ff_range));
 195
 196                 printf("\n");
 197         }
 198
 199         return rc;
 200 }