diff options
Diffstat (limited to 'debugfs/logdump.c')
| -rw-r--r-- | debugfs/logdump.c | 42 |
1 files changed, 38 insertions, 4 deletions
diff --git a/debugfs/logdump.c b/debugfs/logdump.c index 6b0133e0..b600228e 100644 --- a/debugfs/logdump.c +++ b/debugfs/logdump.c @@ -48,6 +48,7 @@ enum journal_location {JOURNAL_IS_INTERNAL, JOURNAL_IS_EXTERNAL}; #define ANY_BLOCK ((blk64_t) -1) static int dump_all, dump_super, dump_old, dump_contents, dump_descriptors; +static int64_t dump_counts; static blk64_t block_to_dump, bitmap_to_dump, inode_block_to_dump; static unsigned int group_to_dump, inode_offset_to_dump; static ext2_ino_t inode_to_dump; @@ -113,9 +114,10 @@ void do_logdump(int argc, char **argv, int sci_idx EXT2FS_ATTR((unused)), bitmap_to_dump = -1; inode_block_to_dump = ANY_BLOCK; inode_to_dump = -1; + dump_counts = -1; reset_getopt(); - while ((c = getopt (argc, argv, "ab:ci:f:OsS")) != EOF) { + while ((c = getopt (argc, argv, "ab:ci:f:OsSn:")) != EOF) { switch (c) { case 'a': dump_all++; @@ -148,6 +150,14 @@ void do_logdump(int argc, char **argv, int sci_idx EXT2FS_ATTR((unused)), case 'S': dump_super++; break; + case 'n': + dump_counts = strtol(optarg, &tmp, 10); + if (*tmp) { + com_err(argv[0], 0, + "Bad log counts number - %s", optarg); + return; + } + break; default: goto print_usage; } @@ -289,7 +299,7 @@ cleanup: return; print_usage: - fprintf(stderr, "%s: Usage: logdump [-acsOS] [-b<block>] [-i<filespec>]\n\t" + fprintf(stderr, "%s: Usage: logdump [-acsOS] [-n<num_trans>] [-b<block>] [-i<filespec>]\n\t" "[-f<journal_file>] [output_file]\n", argv[0]); } @@ -366,9 +376,12 @@ static void dump_journal(char *cmdname, FILE *out_file, journal_header_t *header; tid_t transaction; unsigned int blocknr = 0; + unsigned int first_transaction_blocknr; int fc_done; __u64 total_len; __u32 maxlen; + int64_t cur_counts = 0; + bool exist_no_magic = false; /* First, check to see if there's an ext2 superblock header */ retval = read_journal_block(cmdname, source, 0, buf, 2048); @@ -458,7 +471,19 @@ static void dump_journal(char *cmdname, FILE *out_file, blocknr = 1; } + first_transaction_blocknr = blocknr; + while (1) { + if (dump_old && (dump_counts != -1) && (cur_counts >= dump_counts)) + break; + + if ((blocknr == first_transaction_blocknr) && + (cur_counts != 0) && dump_old && (dump_counts != -1)) { + fprintf(out_file, "Dump all %lld journal records.\n", + (long long) cur_counts); + break; + } + retval = read_journal_block(cmdname, source, ((ext2_loff_t) blocknr) * blocksize, buf, blocksize); @@ -472,8 +497,16 @@ static void dump_journal(char *cmdname, FILE *out_file, blocktype = be32_to_cpu(header->h_blocktype); if (magic != JBD2_MAGIC_NUMBER) { - fprintf (out_file, "No magic number at block %u: " - "end of journal.\n", blocknr); + if (exist_no_magic == false) { + exist_no_magic = true; + fprintf(out_file, "No magic number at block %u: " + "end of journal.\n", blocknr); + } + if (dump_old && (dump_counts != -1)) { + blocknr++; + WRAP(jsb, blocknr, maxlen); + continue; + } break; } @@ -500,6 +533,7 @@ static void dump_journal(char *cmdname, FILE *out_file, continue; case JBD2_COMMIT_BLOCK: + cur_counts++; transaction++; blocknr++; WRAP(jsb, blocknr, maxlen); |