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77 lines
2.9 KiB
Diff
77 lines
2.9 KiB
Diff
From d37a9f1818fa04fc91a497b3541ed205804720af Mon Sep 17 00:00:00 2001
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From: "lihaoxiang (F)" <lihaoxiang9@huawei.com>
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Date: Tue, 15 Nov 2022 16:29:55 +0800
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Subject: [PATCH] debugfs: fix repeated output problem with `logdump -O -n
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<num_trans>`
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Previously, patch 6e4cc3d5eeb2dfaa055e652b5390beaa6c3d05da introduces
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the function of printing the specified number of logs. But there exists
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a shortage when n is larger than the total number of logs, it dumped the
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duplicated records circulately.
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For example, the disk sda only has three records, but using instruction logdump
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-On5, it would output the result as follow:
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----------------------------------------------------------------------
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Journal starts at block 1, transaction 6
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Found expected sequence 6, type 1 (descriptor block) at block 1
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Found expected sequence 6, type 2 (commit block) at block 4
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No magic number at block 5: end of journal.
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Found sequence 2 (not 7) at block 7: end of journal.
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Found expected sequence 2, type 2 (commit block) at block 7
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Found sequence 3 (not 8) at block 8: end of journal.
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Found expected sequence 3, type 1 (descriptor block) at block 8
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Found sequence 3 (not 8) at block 15: end of journal.
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Found expected sequence 3, type 2 (commit block) at block 15
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Found sequence 6 (not 9) at block 1: end of journal. <---------begin loop
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Found expected sequence 6, type 1 (descriptor block) at block 1
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Found sequence 6 (not 9) at block 4: end of journal.
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Found expected sequence 6, type 2 (commit block) at block 4
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Found sequence 2 (not 10) at block 7: end of journal.
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Found expected sequence 2, type 2 (commit block) at block 7
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logdump: short read (read 0, expected 1024) while reading journal
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In this commit, we solve the problem above by exiting dumping if the
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blocknr had already encountered, displayed the total number of logs
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that the disk only possessed.
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Signed-off-by: lihaoxiang <lihaoxiang9@huawei.com>
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Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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---
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debugfs/logdump.c | 9 +++++++++
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1 file changed, 9 insertions(+)
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diff --git a/debugfs/logdump.c b/debugfs/logdump.c
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index 614414e..036b50b 100644
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--- a/debugfs/logdump.c
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+++ b/debugfs/logdump.c
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@@ -376,6 +376,7 @@ static void dump_journal(char *cmdname, FILE *out_file,
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journal_header_t *header;
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tid_t transaction;
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unsigned int blocknr = 0;
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+ unsigned int first_transaction_blocknr;
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int fc_done;
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__u64 total_len;
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__u32 maxlen;
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@@ -470,10 +471,18 @@ static void dump_journal(char *cmdname, FILE *out_file,
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blocknr = 1;
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}
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+ first_transaction_blocknr = blocknr;
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+
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while (1) {
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if (dump_old && (dump_counts != -1) && (cur_counts >= dump_counts))
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break;
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+ if ((blocknr == first_transaction_blocknr) &&
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+ (cur_counts != 0) && dump_old && (dump_counts != -1)) {
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+ fprintf(out_file, "Dump all %lld journal records.\n", cur_counts);
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+ break;
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+ }
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+
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retval = read_journal_block(cmdname, source,
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((ext2_loff_t) blocknr) * blocksize,
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buf, blocksize);
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--
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1.8.3.1
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