LCOV - code coverage report
Current view: top level - edit - journal.c (source / functions) Hit Total Coverage
Test: gfs2-utils.info Lines: 16 327 4.9 %
Date: 2023-09-27 13:48:55 Functions: 1 12 8.3 %

          Line data    Source code
       1             : #include "clusterautoconfig.h"
       2             : 
       3             : #include <stdio.h>
       4             : #include <stdlib.h>
       5             : #include <ctype.h>
       6             : #include <string.h>
       7             : #include <inttypes.h>
       8             : #include <sys/types.h>
       9             : #include <sys/stat.h>
      10             : #include <fcntl.h>
      11             : #include <unistd.h>
      12             : #include <errno.h>
      13             : #include <curses.h>
      14             : #include <term.h>
      15             : #include <time.h>
      16             : #include <signal.h>
      17             : #include <sys/ioctl.h>
      18             : #include <sys/mount.h>
      19             : #include <dirent.h>
      20             : 
      21             : #include "copyright.cf"
      22             : 
      23             : #include "hexedit.h"
      24             : #include "libgfs2.h"
      25             : #include "extended.h"
      26             : #include "gfs2hex.h"
      27             : #include "journal.h"
      28             : 
      29             : /**
      30             :  * find_journal_block - figure out where a journal starts, given the name
      31             :  * Returns: journal block number, changes j_size to the journal size
      32             :  */
      33           2 : uint64_t find_journal_block(const char *journal, uint64_t *j_size)
      34             : {
      35             :         int journal_num;
      36           2 :         uint64_t jindex_block, jblock = 0;
      37             :         struct lgfs2_buffer_head *jindex_bh, *j_bh;
      38             :         struct gfs2_dinode *jdi;
      39             : 
      40           2 :         journal_num = atoi(journal + 7);
      41           2 :         if (journal_num < 0)
      42           0 :                 return 0;
      43             : 
      44           2 :         jindex_block = masterblock("jindex");
      45           2 :         jindex_bh = lgfs2_bread(&sbd, jindex_block);
      46           2 :         di = (struct gfs2_dinode *)jindex_bh->b_data;
      47           2 :         do_dinode_extended(jindex_bh->b_data);
      48           2 :         if (journal_num > indirect->ii[0].dirents - 2) {
      49           0 :                 lgfs2_brelse(jindex_bh);
      50           0 :                 return 0;
      51             :         }
      52           2 :         jblock = indirect->ii[0].dirent[journal_num + 2].inum.in_addr;
      53           2 :         j_bh = lgfs2_bread(&sbd, jblock);
      54           2 :         jdi = (struct gfs2_dinode *)j_bh->b_data;
      55           2 :         *j_size = be64_to_cpu(jdi->di_size);
      56           2 :         lgfs2_brelse(j_bh);
      57           2 :         lgfs2_brelse(jindex_bh);
      58           2 :         return jblock;
      59             : }
      60             : 
      61           0 : static void check_journal_wrap(uint64_t seq, uint64_t *highest_seq)
      62             : {
      63           0 :         if (seq < *highest_seq) {
      64           0 :                 print_gfs2("------------------------------------------------"
      65             :                            "------------------------------------------------");
      66           0 :                 eol(0);
      67           0 :                 print_gfs2("Journal wrapped here.");
      68           0 :                 eol(0);
      69           0 :                 print_gfs2("------------------------------------------------"
      70             :                            "------------------------------------------------");
      71           0 :                 eol(0);
      72             :         }
      73           0 :         *highest_seq = seq;
      74           0 : }
      75             : 
      76             : /**
      77             :  * fsck_readi - same as libgfs2's lgfs2_readi, but sets absolute block #
      78             :  *              of the first bit of data read.
      79             :  */
      80           0 : static int fsck_readi(struct lgfs2_inode *ip, void *rbuf, uint64_t roffset,
      81             :                unsigned int size, uint64_t *abs_block)
      82             : {
      83             :         struct lgfs2_sbd *sdp;
      84             :         struct lgfs2_buffer_head *lbh;
      85             :         uint64_t lblock, dblock;
      86             :         unsigned int o;
      87           0 :         uint32_t extlen = 0;
      88             :         unsigned int amount;
      89           0 :         int not_new = 0;
      90             :         int isdir;
      91           0 :         int copied = 0;
      92             : 
      93           0 :         if (ip == NULL)
      94           0 :                 return 0;
      95           0 :         sdp = ip->i_sbd;
      96           0 :         isdir = !!(S_ISDIR(ip->i_mode));
      97           0 :         *abs_block = 0;
      98           0 :         if (roffset >= ip->i_size)
      99           0 :                 return 0;
     100           0 :         if ((roffset + size) > ip->i_size)
     101           0 :                 size = ip->i_size - roffset;
     102           0 :         if (!size)
     103           0 :                 return 0;
     104           0 :         if (isdir) {
     105           0 :                 o = roffset % sdp->sd_jbsize;
     106           0 :                 lblock = roffset / sdp->sd_jbsize;
     107             :         } else {
     108           0 :                 lblock = roffset >> sdp->sd_bsize_shift;
     109           0 :                 o = roffset & (sdp->sd_bsize - 1);
     110             :         }
     111             : 
     112           0 :         if (!ip->i_height) /* inode_is_stuffed */
     113           0 :                 o += sizeof(struct gfs2_dinode);
     114           0 :         else if (isdir)
     115           0 :                 o += sizeof(struct gfs2_meta_header);
     116             : 
     117           0 :         while (copied < size) {
     118           0 :                 amount = size - copied;
     119           0 :                 if (amount > sdp->sd_bsize - o)
     120           0 :                         amount = sdp->sd_bsize - o;
     121           0 :                 if (!extlen)
     122           0 :                         if (lgfs2_block_map(ip, lblock, &not_new, &dblock, &extlen, FALSE))
     123           0 :                                 exit(1);
     124           0 :                 if (dblock) {
     125           0 :                         lbh = lgfs2_bread(sdp, dblock);
     126           0 :                         if (*abs_block == 0)
     127           0 :                                 *abs_block = lbh->b_blocknr;
     128           0 :                         dblock++;
     129           0 :                         extlen--;
     130             :                 } else
     131           0 :                         lbh = NULL;
     132           0 :                 if (lbh) {
     133           0 :                         memcpy(rbuf, lbh->b_data + o, amount);
     134           0 :                         lgfs2_brelse(lbh);
     135             :                 } else {
     136           0 :                         memset(rbuf, 0, amount);
     137             :                 }
     138           0 :                 copied += amount;
     139           0 :                 lblock++;
     140           0 :                 o = (isdir) ? sizeof(struct gfs2_meta_header) : 0;
     141             :         }
     142           0 :         return copied;
     143             : }
     144             : 
     145             : /**
     146             :  * ld_is_pertinent - determine if a log descriptor is pertinent
     147             :  *
     148             :  * This function checks a log descriptor buffer to see if it contains
     149             :  * references to a given traced block, or its rgrp bitmap block.
     150             :  */
     151           0 : static int ld_is_pertinent(const __be64 *b, const char *end, uint64_t tblk,
     152             :                            struct lgfs2_rgrp_tree *rgd, uint64_t bitblk)
     153             : {
     154           0 :         const __be64 *blk = b;
     155             : 
     156           0 :         if (!tblk)
     157           0 :                 return 1;
     158             : 
     159           0 :         while (*blk && (char *)blk < end) {
     160           0 :                 if (be64_to_cpu(*blk) == tblk || be64_to_cpu(*blk) == bitblk)
     161           0 :                         return 1;
     162           0 :                 blk++;
     163             :         }
     164           0 :         return 0;
     165             : }
     166             : 
     167             : /**
     168             :  * print_ld_blks - print all blocks given in a log descriptor
     169             :  * returns: the number of block numbers it printed
     170             :  */
     171           0 : static int print_ld_blks(const __be64 *b, const char *end, int start_line,
     172             :                          uint64_t tblk, uint64_t *tblk_off, uint64_t bitblk,
     173             :                          struct lgfs2_rgrp_tree *rgd, uint64_t abs_block, int prnt,
     174             :                          uint64_t *bblk_off, int is_meta_ld)
     175             : {
     176           0 :         int bcount = 0, found_tblk = 0, found_bblk = 0;
     177             :         static char str[256];
     178             :         struct lgfs2_buffer_head *j_bmap_bh;
     179             : 
     180           0 :         if (tblk_off)
     181           0 :                 *tblk_off = 0;
     182           0 :         if (bblk_off)
     183           0 :                 *bblk_off = 0;
     184           0 :         while (*b && (char *)b < end) {
     185           0 :                 if (!termlines ||
     186           0 :                     (print_entry_ndx >= start_row[dmode] &&
     187           0 :                      ((print_entry_ndx - start_row[dmode])+1) *
     188           0 :                      lines_per_row[dmode] <= termlines - start_line - 2)) {
     189           0 :                         if (prnt && bcount && bcount % 4 == 0) {
     190           0 :                                 eol(0);
     191           0 :                                 print_gfs2("                    ");
     192             :                         }
     193           0 :                         bcount++;
     194           0 :                         if (prnt) {
     195           0 :                                 if (is_meta_ld) {
     196           0 :                                         j_bmap_bh = lgfs2_bread(&sbd, abs_block +
     197             :                                                           bcount);
     198           0 :                                         sprintf(str, "0x%"PRIx64" %2s",
     199             :                                                 be64_to_cpu(*b),
     200           0 :                                                 mtypes[lgfs2_get_block_type(j_bmap_bh->b_data)]);
     201           0 :                                         lgfs2_brelse(j_bmap_bh);
     202             :                                 } else {
     203           0 :                                         sprintf(str, "0x%"PRIx64, be64_to_cpu(*b));
     204             :                                 }
     205           0 :                                 print_gfs2("%-18.18s ", str);
     206             :                         }
     207           0 :                         if (!found_tblk && tblk_off)
     208           0 :                                 (*tblk_off)++;
     209           0 :                         if (!found_bblk && bblk_off)
     210           0 :                                 (*bblk_off)++;
     211           0 :                         if (tblk && (be64_to_cpu(*b) == tblk)) {
     212           0 :                                 found_tblk = 1;
     213           0 :                                 print_gfs2("<-------------------------0x%"PRIx64" ", tblk);
     214           0 :                                 eol(18 * (bcount % 4) + 1);
     215           0 :                                 print_gfs2("                    ");
     216             :                         }
     217           0 :                         if (tblk && rgd && (be64_to_cpu(*b) == bitblk)) {
     218           0 :                                 int type, bmap = 0;
     219             :                                 uint64_t o;
     220             :                                 char *save_ptr;
     221             : 
     222           0 :                                 found_bblk = 1;
     223           0 :                                 print_gfs2("<-------------------------");
     224           0 :                                 if (is_meta_ld) {
     225           0 :                                         o = tblk - rgd->rt_data0;
     226           0 :                                         if (o >= ((uint64_t)rgd->rt_bits->bi_start +
     227           0 :                                                   rgd->rt_bits->bi_len) *
     228             :                                             GFS2_NBBY)
     229           0 :                                                 o += (sizeof(struct gfs2_rgrp) -
     230             :                                                       sizeof(struct gfs2_meta_header))
     231             :                                                         * GFS2_NBBY;
     232           0 :                                         bmap = o / sbd.sd_blocks_per_bitmap;
     233           0 :                                         save_ptr = rgd->rt_bits[bmap].bi_data;
     234           0 :                                         j_bmap_bh = lgfs2_bread(&sbd, abs_block +
     235             :                                                           bcount);
     236           0 :                                         rgd->rt_bits[bmap].bi_data = j_bmap_bh->b_data;
     237           0 :                                         type = lgfs2_get_bitmap(&sbd, tblk, rgd);
     238           0 :                                         lgfs2_brelse(j_bmap_bh);
     239           0 :                                         if (type < 0) {
     240           0 :                                                 perror("Error printing log descriptor blocks");
     241           0 :                                                 exit(1);
     242             :                                         }
     243           0 :                                         rgd->rt_bits[bmap].bi_data = save_ptr;
     244           0 :                                         print_gfs2("bit for blk 0x%"PRIx64" is %d (%s)",
     245             :                                                    tblk, type,
     246             :                                                    allocdesc[type]);
     247             :                                 } else {
     248           0 :                                         print_gfs2("bitmap for blk 0x%"PRIx64" was revoked",
     249             :                                                    tblk);
     250             :                                 }
     251           0 :                                 eol(18 * (bcount % 4) + 1);
     252           0 :                                 print_gfs2("                    ");
     253             :                         }
     254             :                 }
     255           0 :                 b++;
     256             :         }
     257           0 :         if (prnt)
     258           0 :                 eol(0);
     259           0 :         if (tblk_off && (!found_tblk || !is_meta_ld))
     260           0 :                 *tblk_off = 0;
     261           0 :         if (bblk_off && (!found_bblk || !is_meta_ld))
     262           0 :                 *bblk_off = 0;
     263           0 :         return bcount;
     264             : }
     265             : 
     266           0 : static int is_wrap_pt(void *buf, uint64_t *highest_seq)
     267             : {
     268           0 :         const struct lgfs2_metadata *mtype = get_block_type(buf);
     269             : 
     270           0 :         if (mtype != NULL && mtype->mh_type == GFS2_METATYPE_LH) {
     271           0 :                 struct gfs2_log_header *lh = buf;
     272             :                 uint64_t seq;
     273             : 
     274           0 :                 seq = be64_to_cpu(lh->lh_sequence);
     275           0 :                 if (seq < *highest_seq)
     276           0 :                         return 1;
     277           0 :                 *highest_seq = seq;
     278             :         }
     279           0 :         return 0;
     280             : }
     281             : 
     282             : /**
     283             :  * find_wrap_pt - figure out where a journal wraps
     284             :  * Returns: The wrap point, in bytes
     285             :  */
     286           0 : static uint64_t find_wrap_pt(struct lgfs2_inode *ji, char *jbuf, uint64_t jblock, uint64_t j_size)
     287             : {
     288           0 :         uint64_t jb = 0;
     289           0 :         uint64_t highest_seq = 0;
     290             : 
     291           0 :         for (jb = 0; jb < j_size; jb += sbd.sd_bsize) {
     292           0 :                 int found = 0;
     293             :                 int copied;
     294             :                 uint64_t abs_block;
     295             : 
     296           0 :                 copied = fsck_readi(ji, jbuf, jb, sbd.sd_bsize, &abs_block);
     297           0 :                 if (!copied) /* end of file */
     298           0 :                         break;
     299           0 :                 found = is_wrap_pt(jbuf, &highest_seq);
     300           0 :                 if (found)
     301           0 :                         return jb;
     302             :         }
     303           0 :         return 0;
     304             : }
     305             : 
     306             : /**
     307             :  * process_ld - process a log descriptor
     308             :  */
     309           0 : static int process_ld(uint64_t abs_block, uint64_t wrappt, uint64_t j_size,
     310             :                       uint64_t jb, char *buf, int tblk,
     311             :                       uint64_t *tblk_off, uint64_t bitblk,
     312             :                       struct lgfs2_rgrp_tree *rgd, int *prnt, uint64_t *bblk_off)
     313             : {
     314             :         __be64 *b;
     315           0 :         struct gfs2_log_descriptor *ld = (void *)buf;
     316           0 :         int ltndx, is_meta_ld = 0;
     317           0 :         int ld_blocks = 0;
     318           0 :         uint32_t ld_type = be32_to_cpu(ld->ld_type);
     319           0 :         uint32_t ld_length = be32_to_cpu(ld->ld_length);
     320           0 :         uint32_t ld_data1 = be32_to_cpu(ld->ld_data1);
     321           0 :         uint32_t logtypes[6] = {
     322             :                 GFS2_LOG_DESC_METADATA,
     323             :                 GFS2_LOG_DESC_REVOKE,
     324             :                 GFS2_LOG_DESC_JDATA,
     325             :                 0, 0, 0
     326             :         };
     327           0 :         const char *logtypestr[6] = {
     328             :                 "Metadata",
     329             :                 "Revoke",
     330             :                 "Jdata",
     331             :                 "Unknown",
     332             :                 "Unknown",
     333             :                 "Unknown"
     334             :         };
     335           0 :         b = (__be64 *)(buf + sizeof(struct gfs2_log_descriptor));
     336           0 :         *prnt = ld_is_pertinent(b, (buf + sbd.sd_bsize), tblk, rgd, bitblk);
     337             : 
     338           0 :         if (*prnt) {
     339           0 :                 print_gfs2("0x%"PRIx64" (j+%4"PRIx64"): Log descriptor, ",
     340           0 :                            abs_block, ((jb + wrappt) % j_size) / sbd.sd_bsize);
     341           0 :                 print_gfs2("type %"PRIu32" ", ld_type);
     342             : 
     343           0 :                 for (ltndx = 0;; ltndx++) {
     344           0 :                         if (ld_type == logtypes[ltndx] ||
     345           0 :                             logtypes[ltndx] == 0)
     346             :                                 break;
     347             :                 }
     348           0 :                 print_gfs2("(%s) ", logtypestr[ltndx]);
     349           0 :                 print_gfs2("len:%"PRIu32", data1: %"PRIu32, ld_length, ld_data1);
     350           0 :                 eol(0);
     351           0 :                 print_gfs2("                    ");
     352             :         }
     353           0 :         ld_blocks = ld_data1;
     354           0 :         if (ld_type == GFS2_LOG_DESC_METADATA)
     355           0 :                 is_meta_ld = 1;
     356           0 :         ld_blocks -= print_ld_blks(b, (buf + sbd.sd_bsize), line, tblk, tblk_off,
     357             :                                    bitblk, rgd, abs_block, *prnt, bblk_off,
     358             :                                    is_meta_ld);
     359             : 
     360           0 :         return ld_blocks;
     361             : }
     362             : 
     363             : /**
     364             :  * meta_has_ref - check if a metadata block references a given block
     365             :  */
     366           0 : static int meta_has_ref(uint64_t abs_block, int tblk)
     367             : {
     368             :         const struct lgfs2_metadata *mtype;
     369             :         struct lgfs2_buffer_head *mbh;
     370           0 :         int structlen = 0, has_ref = 0;
     371             :         __be64 *b;
     372             :         struct gfs2_dinode *dinode;
     373             : 
     374           0 :         mbh = lgfs2_bread(&sbd, abs_block);
     375           0 :         mtype = get_block_type(mbh->b_data);
     376           0 :         if (mtype != NULL) {
     377           0 :                 structlen = mtype->size;
     378           0 :                 if (mtype->mh_type == GFS2_METATYPE_DI) {
     379           0 :                         dinode = (struct gfs2_dinode *)mbh->b_data;
     380           0 :                         if (be64_to_cpu(dinode->di_eattr) == tblk)
     381           0 :                                 has_ref = 1;
     382             :                 }
     383             :         }
     384           0 :         b = (__be64 *)(mbh->b_data + structlen);
     385           0 :         while (!has_ref && mtype && (char *)b < mbh->b_data + sbd.sd_bsize) {
     386           0 :                 if (be64_to_cpu(*b) == tblk)
     387           0 :                         has_ref = 1;
     388           0 :                 b++;
     389             :         }
     390           0 :         lgfs2_brelse(mbh);
     391           0 :         return has_ref;
     392             : }
     393             : 
     394             : 
     395             : /**
     396             :  * get_ldref - get a log descriptor reference block, given a block number
     397             :  *
     398             :  * Note that we can't pass in abs_block here, because journal wrap may
     399             :  * mean that the block we're interested in, in the journal, is before the
     400             :  * log descriptor that holds the reference we need.
     401             :  */
     402           0 : static uint64_t get_ldref(uint64_t abs_ld, int offset_from_ld)
     403             : {
     404             :         struct lgfs2_buffer_head *jbh;
     405             :         uint64_t refblk;
     406             :         __be64 *b;
     407             : 
     408           0 :         jbh = lgfs2_bread(&sbd, abs_ld);
     409           0 :         b = (__be64 *)(jbh->b_data + sizeof(struct gfs2_log_descriptor));
     410           0 :         b += offset_from_ld - 1;
     411           0 :         refblk = be64_to_cpu(*b);
     412           0 :         lgfs2_brelse(jbh);
     413           0 :         return refblk;
     414             : }
     415             : 
     416           0 : static void display_log_header(void *buf, uint64_t *highest_seq, uint64_t abs_block, uint64_t jb, uint64_t j_size)
     417             : {
     418             :         const struct lgfs2_metafield *lh_flags_field;
     419             :         const struct lgfs2_metadata *mtype;
     420           0 :         struct gfs2_log_header *lh = buf;
     421             :         char flags_str[256];
     422             : 
     423           0 :         mtype = &lgfs2_metadata[LGFS2_MT_GFS2_LOG_HEADER];
     424           0 :         lh_flags_field = &mtype->fields[6]; /* lh_flags is the 7th field in the struct */
     425           0 :         check_journal_wrap(be64_to_cpu(lh->lh_sequence), highest_seq);
     426           0 :         lgfs2_field_str(flags_str, sizeof(flags_str), buf, lh_flags_field, (dmode == HEX_MODE));
     427           0 :         print_gfs2("0x%"PRIx64" (j+%4"PRIx64"): Log header: Seq: 0x%"PRIx64", "
     428             :                    "tail: 0x%"PRIx32", blk: 0x%"PRIx32" [%s]",
     429           0 :                     abs_block, (jb % j_size) / sbd.sd_bsize, be64_to_cpu(lh->lh_sequence),
     430           0 :                     be32_to_cpu(lh->lh_tail), be32_to_cpu(lh->lh_blkno), flags_str);
     431           0 : }
     432             : 
     433             : /**
     434             :  * dump_journal - dump a journal file's contents.
     435             :  * @journal: name of the journal to dump
     436             :  * @tblk: block number to trace in the journals
     437             :  *
     438             :  * This function dumps the contents of a journal. If a trace block is specified
     439             :  * then only information printed is: (1) log descriptors that reference that
     440             :  * block, (2) metadata in the journal that references the block, or (3)
     441             :  * rgrp bitmaps that reference that block's allocation bit status.
     442             :  */
     443           0 : void dump_journal(const char *journal, uint64_t tblk)
     444             : {
     445             :         const struct lgfs2_metadata *mtype;
     446           0 :         struct lgfs2_buffer_head *j_bh = NULL;
     447           0 :         uint64_t jblock, j_size, jb, abs_block, saveblk, wrappt = 0;
     448             :         int start_line, journal_num;
     449           0 :         struct lgfs2_inode *j_inode = NULL;
     450           0 :         int ld_blocks = 0, offset_from_ld = 0;
     451           0 :         uint64_t tblk_off = 0, bblk_off = 0, bitblk = 0;
     452           0 :         uint64_t highest_seq = 0;
     453           0 :         char *jbuf = NULL;
     454           0 :         char *buf = NULL;
     455           0 :         struct lgfs2_rgrp_tree *rgd = NULL;
     456           0 :         uint64_t abs_ld = 0;
     457             : 
     458           0 :         mtype = lgfs2_find_mtype(GFS2_METATYPE_LH);
     459             : 
     460           0 :         start_line = line;
     461           0 :         lines_per_row[dmode] = 1;
     462           0 :         journal_num = atoi(journal + 7);
     463           0 :         print_gfs2("Dumping journal #%d.", journal_num);
     464           0 :         if (tblk) {
     465           0 :                 dmode = HEX_MODE;
     466           0 :                 print_gfs2(" Tracing block 0x%"PRIx64, tblk);
     467             :         }
     468           0 :         eol(0);
     469           0 :         jblock = find_journal_block(journal, &j_size);
     470           0 :         if (!jblock)
     471           0 :                 return;
     472             : 
     473           0 :         j_bh = lgfs2_bread(&sbd, jblock);
     474           0 :         j_inode = lgfs2_inode_get(&sbd, j_bh);
     475           0 :         if (j_inode == NULL) {
     476           0 :                 fprintf(stderr, "Out of memory\n");
     477           0 :                 exit(-1);
     478             :         }
     479           0 :         jbuf = malloc(sbd.sd_bsize);
     480           0 :         if (jbuf == NULL) {
     481           0 :                 fprintf(stderr, "Out of memory\n");
     482           0 :                 exit(-1);
     483             :         }
     484             : 
     485           0 :         if (tblk) {
     486             :                 uint64_t wp;
     487             : 
     488           0 :                 rgd = lgfs2_blk2rgrpd(&sbd, tblk);
     489           0 :                 if (!rgd) {
     490           0 :                         print_gfs2("Can't locate the rgrp for block 0x%"PRIx64,
     491             :                                    tblk);
     492           0 :                         eol(0);
     493             :                 } else {
     494             :                         uint64_t o;
     495           0 :                         int bmap = 0;
     496             : 
     497           0 :                         print_gfs2("rgd: 0x%"PRIx64" for 0x%"PRIx32", ", rgd->rt_addr,
     498             :                                    rgd->rt_length);
     499           0 :                         o = tblk - rgd->rt_data0;
     500           0 :                         if (o >= (rgd->rt_bits->bi_start +
     501           0 :                                   rgd->rt_bits->bi_len) * (uint64_t)GFS2_NBBY)
     502           0 :                                 o += (sizeof(struct gfs2_rgrp) -
     503             :                                       sizeof(struct gfs2_meta_header))
     504             :                                         * GFS2_NBBY;
     505           0 :                         bmap = o / sbd.sd_blocks_per_bitmap;
     506           0 :                         bitblk = rgd->rt_addr + bmap;
     507           0 :                         print_gfs2("bitmap: %d, bitblk: 0x%"PRIx64, bmap, bitblk);
     508           0 :                         eol(0);
     509             :                 }
     510             : 
     511           0 :                 wrappt = find_wrap_pt(j_inode, jbuf, jblock, j_size);
     512           0 :                 wp = wrappt / sbd.sd_bsize;
     513           0 :                 print_gfs2("Starting at journal wrap block: 0x%"PRIx64" (j + 0x%"PRIx64")",
     514             :                            jblock + wp, wp);
     515           0 :                 eol(0);
     516             :         }
     517             : 
     518           0 :         for (jb = 0; jb < j_size; jb += sbd.sd_bsize) {
     519           0 :                 int is_pertinent = 1;
     520           0 :                 uint32_t block_type = 0;
     521           0 :                 int error = fsck_readi(j_inode, (void *)jbuf,
     522           0 :                                    ((jb + wrappt) % j_size),
     523             :                                    sbd.sd_bsize, &abs_block);
     524           0 :                 if (!error) /* end of file */
     525           0 :                         break;
     526           0 :                 buf = jbuf;
     527           0 :                 offset_from_ld++;
     528           0 :                 mtype = get_block_type(buf);
     529           0 :                 if (mtype != NULL)
     530           0 :                         block_type = mtype->mh_type;
     531             : 
     532           0 :                 if (block_type == GFS2_METATYPE_LD) {
     533           0 :                         ld_blocks = process_ld(abs_block, wrappt, j_size, jb,
     534             :                                                buf, tblk, &tblk_off,
     535             :                                                bitblk, rgd, &is_pertinent,
     536             :                                                &bblk_off);
     537           0 :                         offset_from_ld = 0;
     538           0 :                         abs_ld = abs_block;
     539           0 :                 } else if (!tblk && block_type == GFS2_METATYPE_LH) {
     540           0 :                         display_log_header(buf, &highest_seq, abs_block, jb + wrappt, j_size);
     541           0 :                         eol(0);
     542           0 :                 } else if ((ld_blocks > 0) && (block_type == GFS2_METATYPE_LB)) {
     543           0 :                         __be64 *b = (__be64 *)(buf + sizeof(struct gfs2_meta_header));
     544             : 
     545           0 :                         print_gfs2("0x%"PRIx64" (j+%4"PRIx64"): Log descriptor"
     546             :                                    " continuation block", abs_block,
     547           0 :                                    ((jb + wrappt) % j_size) / sbd.sd_bsize);
     548           0 :                         eol(0);
     549           0 :                         print_gfs2("                    ");
     550           0 :                         ld_blocks -= print_ld_blks(b, (buf + sbd.sd_bsize), start_line,
     551             :                                              tblk, &tblk_off, 0, rgd, 0, 1, NULL, 0);
     552           0 :                 } else if (block_type == 0) {
     553           0 :                         continue;
     554             :                 }
     555             :                 /* Check if this metadata block references the block we're
     556             :                    trying to trace. */
     557           0 :                 if (details || (tblk && ((is_pertinent &&
     558           0 :                      ((tblk_off && offset_from_ld == tblk_off) ||
     559           0 :                       (bblk_off && offset_from_ld == bblk_off))) ||
     560           0 :                      meta_has_ref(abs_block, tblk)))) {
     561           0 :                         uint64_t ref_blk = 0;
     562             : 
     563           0 :                         saveblk = block;
     564           0 :                         block = abs_block;
     565           0 :                         if (tblk && !details) {
     566           0 :                                 ref_blk = get_ldref(abs_ld, offset_from_ld);
     567           0 :                                 display(0, 1, tblk, ref_blk);
     568             :                         } else {
     569           0 :                                 display(0, 0, 0, 0);
     570             :                         }
     571           0 :                         block = saveblk;
     572             :                 }
     573             :         }
     574           0 :         if (j_inode != NULL)
     575           0 :                 lgfs2_inode_put(&j_inode);
     576           0 :         lgfs2_brelse(j_bh);
     577           0 :         blockhist = -1; /* So we don't print anything else */
     578           0 :         free(jbuf);
     579           0 :         if (!termlines)
     580           0 :                 fflush(stdout);
     581             : }

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