lustre/obdclass/llog_swab.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (C) 2004-2005 Cluster File Systems, Inc.
   5  *   Author: jacob berkman  <jacob@clusterfs.com>
   6  *
   7  *   This file is part of Lustre, http://www.lustre.org.
   8  *
   9  *   Lustre is free software; you can redistribute it and/or
  10  *   modify it under the terms of version 2 of the GNU General Public
  11  *   License as published by the Free Software Foundation.
  12  *
  13  *   Lustre is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *   GNU General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU General Public License
  19  *   along with Lustre; if not, write to the Free Software
  20  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  *
  22  * Swabbing of llog datatypes (from disk or over the wire).
  23  *
  24  */
  25
  26 #define DEBUG_SUBSYSTEM S_LOG
  27
  28 #ifndef __KERNEL__
  29 #include <liblustre.h>
  30 #endif
  31
  32 #include <linux/lustre_log.h>
  33
  34 static void print_llogd_body(struct llogd_body *d)
  35 {
  36         CDEBUG(D_OTHER, "llogd body: %p\n", d);
  37         CDEBUG(D_OTHER, "\tlgd_logid.lgl_oid: "LPX64"\n", d->lgd_logid.lgl_oid);
  38         CDEBUG(D_OTHER, "\tlgd_logid.lgl_ogr: "LPX64"\n", d->lgd_logid.lgl_ogr);
  39         CDEBUG(D_OTHER, "\tlgd_logid.lgl_ogen: %#x\n", d->lgd_logid.lgl_ogen);
  40         CDEBUG(D_OTHER, "\tlgd_ctxt_idx: %#x\n", d->lgd_ctxt_idx);
  41         CDEBUG(D_OTHER, "\tlgd_llh_flags: %#x\n", d->lgd_llh_flags);
  42         CDEBUG(D_OTHER, "\tlgd_index: %#x\n", d->lgd_index);
  43         CDEBUG(D_OTHER, "\tlgd_saved_index: %#x\n", d->lgd_saved_index);
  44         CDEBUG(D_OTHER, "\tlgd_len: %#x\n", d->lgd_len);
  45         CDEBUG(D_OTHER, "\tlgd_cur_offset: "LPX64"\n", d->lgd_cur_offset);
  46 }
  47
  48 void lustre_swab_llogd_body (struct llogd_body *d)
  49 {
  50         ENTRY;
  51         print_llogd_body(d);
  52         __swab64s (&d->lgd_logid.lgl_oid);
  53         __swab64s (&d->lgd_logid.lgl_ogr);
  54         __swab32s (&d->lgd_logid.lgl_ogen);
  55         __swab32s (&d->lgd_ctxt_idx);
  56         __swab32s (&d->lgd_llh_flags);
  57         __swab32s (&d->lgd_index);
  58         __swab32s (&d->lgd_saved_index);
  59         __swab32s (&d->lgd_len);
  60         __swab64s (&d->lgd_cur_offset);
  61         print_llogd_body(d);
  62         EXIT;
  63 }
  64 EXPORT_SYMBOL(lustre_swab_llogd_body);
  65
  66 void lustre_swab_llogd_conn_body (struct llogd_conn_body *d)
  67 {
  68         __swab64s (&d->lgdc_gen.mnt_cnt);
  69         __swab64s (&d->lgdc_gen.conn_cnt);
  70         __swab64s (&d->lgdc_logid.lgl_oid);
  71         __swab64s (&d->lgdc_logid.lgl_ogr);
  72         __swab32s (&d->lgdc_logid.lgl_ogen);
  73         __swab32s (&d->lgdc_ctxt_idx);
  74 }
  75 EXPORT_SYMBOL(lustre_swab_llogd_conn_body);
  76
  77 void lustre_swab_ll_fid (struct ll_fid *fid)
  78 {
  79         __swab64s (&fid->id);
  80         __swab32s (&fid->generation);
  81         __swab32s (&fid->f_type);
  82 }
  83 EXPORT_SYMBOL(lustre_swab_ll_fid);
  84
  85 void lustre_swab_llog_rec(struct llog_rec_hdr *rec, struct llog_rec_tail *tail)
  86 {
  87         __swab32s(&rec->lrh_len);
  88         __swab32s(&rec->lrh_index);
  89         __swab32s(&rec->lrh_type);
  90
  91         switch (rec->lrh_type) {
  92         case OST_SZ_REC: {
  93                 struct llog_size_change_rec *lsc =
  94                         (struct llog_size_change_rec *)rec;
  95
  96                 lustre_swab_ll_fid(&lsc->lsc_fid);
  97                 __swab32s(&lsc->lsc_io_epoch);
  98
  99                 break;
 100         }
 101
 102         case OST_RAID1_REC:
 103                 break;
 104
 105         case MDS_UNLINK_REC: {
 106                 struct llog_unlink_rec *lur = (struct llog_unlink_rec *)rec;
 107
 108                 __swab64s(&lur->lur_oid);
 109                 __swab32s(&lur->lur_ogen);
 110
 111                 break;
 112         }
 113
 114         case MDS_SETATTR_REC: {
 115                 struct llog_setattr_rec *lsr = (struct llog_setattr_rec *)rec;
 116
 117                 __swab64s(&lsr->lsr_oid);
 118                 __swab32s(&lsr->lsr_ogen);
 119                 __swab32s(&lsr->lsr_uid);
 120                 __swab32s(&lsr->lsr_gid);
 121
 122                 break;
 123         }
 124
 125         case OBD_CFG_REC:
 126         case PTL_CFG_REC:                       /* obsolete */
 127                 /* these are swabbed as they are consumed */
 128                 break;
 129
 130         case LLOG_HDR_MAGIC: {
 131                 struct llog_log_hdr *llh = (struct llog_log_hdr *)rec;
 132
 133                 __swab64s(&llh->llh_timestamp);
 134                 __swab32s(&llh->llh_count);
 135                 __swab32s(&llh->llh_bitmap_offset);
 136                 __swab32s(&llh->llh_flags);
 137                 __swab32s(&llh->llh_size);
 138                 __swab32s(&llh->llh_cat_idx);
 139                 if (tail != &llh->llh_tail) {
 140                         __swab32s(&llh->llh_tail.lrt_index);
 141                         __swab32s(&llh->llh_tail.lrt_len);
 142                 }
 143
 144                 break;
 145         }
 146
 147         case LLOG_LOGID_MAGIC: {
 148                 struct llog_logid_rec *lid = (struct llog_logid_rec *)rec;
 149
 150                 __swab64s(&lid->lid_id.lgl_oid);
 151                 __swab64s(&lid->lid_id.lgl_ogr);
 152                 __swab32s(&lid->lid_id.lgl_ogen);
 153                 break;
 154         }
 155
 156         case LLOG_PAD_MAGIC:
 157         /* ignore old pad records of type 0 */
 158         case 0:
 159                 break;
 160
 161         default:
 162                 CERROR("Unknown llog rec type %#x swabbing rec %p\n",
 163                        rec->lrh_type, rec);
 164         }
 165
 166         if (tail) {
 167                 __swab32s(&tail->lrt_len);
 168                 __swab32s(&tail->lrt_index);
 169         }
 170 }
 171 EXPORT_SYMBOL(lustre_swab_llog_rec);
 172
 173 static void print_llog_hdr(struct llog_log_hdr *h)
 174 {
 175         CDEBUG(D_OTHER, "llog header: %p\n", h);
 176         CDEBUG(D_OTHER, "\tllh_hdr.lrh_index: %#x\n", h->llh_hdr.lrh_index);
 177         CDEBUG(D_OTHER, "\tllh_hdr.lrh_len: %#x\n", h->llh_hdr.lrh_len);
 178         CDEBUG(D_OTHER, "\tllh_hdr.lrh_type: %#x\n", h->llh_hdr.lrh_type);
 179         CDEBUG(D_OTHER, "\tllh_timestamp: "LPX64"\n", h->llh_timestamp);
 180         CDEBUG(D_OTHER, "\tllh_count: %#x\n", h->llh_count);
 181         CDEBUG(D_OTHER, "\tllh_bitmap_offset: %#x\n", h->llh_bitmap_offset);
 182         CDEBUG(D_OTHER, "\tllh_flags: %#x\n", h->llh_flags);
 183         CDEBUG(D_OTHER, "\tllh_size: %#x\n", h->llh_size);
 184         CDEBUG(D_OTHER, "\tllh_cat_idx: %#x\n", h->llh_cat_idx);
 185         CDEBUG(D_OTHER, "\tllh_tail.lrt_index: %#x\n", h->llh_tail.lrt_index);
 186         CDEBUG(D_OTHER, "\tllh_tail.lrt_len: %#x\n", h->llh_tail.lrt_len);
 187 }
 188
 189 void lustre_swab_llog_hdr (struct llog_log_hdr *h)
 190 {
 191         ENTRY;
 192         print_llog_hdr(h);
 193
 194         lustre_swab_llog_rec(&h->llh_hdr, &h->llh_tail);
 195
 196         print_llog_hdr(h);
 197         EXIT;
 198 }
 199 EXPORT_SYMBOL(lustre_swab_llog_hdr);
 200
 201 static void print_lustre_cfg(struct lustre_cfg *lcfg)
 202 {
 203         int i;
 204         ENTRY;
 205
 206         if (!(portal_debug & D_OTHER)) /* don't loop on nothing */
 207                 return;
 208         CDEBUG(D_OTHER, "lustre_cfg: %p\n", lcfg);
 209         CDEBUG(D_OTHER, "\tlcfg->lcfg_magic: %#x\n", lcfg->lcfg_magic);
 210         CDEBUG(D_OTHER, "\tlcfg->lcfg_version: %#x\n", lcfg->lcfg_version);
 211
 212         CDEBUG(D_OTHER, "\tlcfg->lcfg_command: %#x\n", lcfg->lcfg_command);
 213         CDEBUG(D_OTHER, "\tlcfg->lcfg_num: %#x\n", lcfg->lcfg_num);
 214         CDEBUG(D_OTHER, "\tlcfg->lcfg_flags: %#x\n", lcfg->lcfg_flags);
 215         CDEBUG(D_OTHER, "\tlcfg->lcfg_nid: "LPX64"\n", lcfg->lcfg_nid);
 216
 217         CDEBUG(D_OTHER, "\tlcfg->lcfg_bufcount: %d\n", lcfg->lcfg_bufcount);
 218         if (lcfg->lcfg_bufcount < LUSTRE_CFG_MAX_BUFCOUNT)
 219                 for (i = 0; i < lcfg->lcfg_bufcount; i++)
 220                         CDEBUG(D_OTHER, "\tlcfg->lcfg_buflens[%d]: %d\n",
 221                                i, lcfg->lcfg_buflens[i]);
 222         EXIT;
 223 }
 224
 225 void lustre_swab_lustre_cfg(struct lustre_cfg *lcfg)
 226 {
 227         int i;
 228         ENTRY;
 229
 230         __swab32s(&lcfg->lcfg_magic);
 231
 232         if (lcfg->lcfg_magic != LUSTRE_CFG_MAGIC) {
 233                 CERROR("not swabbing lustre_cfg magic %#x (expecting %#x)\n",
 234                        lcfg->lcfg_magic, LUSTRE_CFG_MAGIC);
 235                 EXIT;
 236                 return;
 237         }
 238
 239         __swab32s(&lcfg->lcfg_version);
 240         __swab32s(&lcfg->lcfg_command);
 241
 242         __swab32s(&lcfg->lcfg_num);
 243         __swab32s(&lcfg->lcfg_flags);
 244         __swab64s(&lcfg->lcfg_nid);
 245
 246         __swab32s(&lcfg->lcfg_bufcount);
 247         for (i = 0; i < lcfg->lcfg_bufcount && i < LUSTRE_CFG_MAX_BUFCOUNT; i++)
 248                 __swab32s(&lcfg->lcfg_buflens[i]);
 249
 250         print_lustre_cfg(lcfg);
 251         EXIT;
 252         return;
 253 }
 254 EXPORT_SYMBOL(lustre_swab_lustre_cfg);