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From 0c2f52bb9b0bce392f14a38d6477e396d6fc987e Mon Sep 17 00:00:00 2001
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From: Lennart Poettering <lennart@poettering.net>
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Date: Fri, 24 Jul 2015 02:00:43 +0200
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Subject: [PATCH] journal: when verifying journal files, handle empty ones
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nicely
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A journal file that carries no objects should be considered valid.
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Cherry-picked from: 8dc37a85255f68d62f7af66696cbf6a66401fb2a
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Resolves: #1350232
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---
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src/journal/journal-verify.c | 37 ++++++++++++++----------------------
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1 file changed, 14 insertions(+), 23 deletions(-)
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diff --git a/src/journal/journal-verify.c b/src/journal/journal-verify.c
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index d2d5c400c..53f0550da 100644
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--- a/src/journal/journal-verify.c
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+++ b/src/journal/journal-verify.c
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@@ -885,7 +885,11 @@ int journal_file_verify(
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* superficial structure, headers, hashes. */
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p = le64toh(f->header->header_size);
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- while (p != 0) {
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+ for (;;) {
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+ /* Early exit if there are no objects in the file, at all */
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+ if (le64toh(f->header->tail_object_offset) == 0)
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+ break;
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+
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if (show_progress)
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draw_progress(scale_progress(0x7FFF, p, le64toh(f->header->tail_object_offset)), &last_usec);
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@@ -901,9 +905,6 @@ int journal_file_verify(
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goto fail;
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}
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- if (p == le64toh(f->header->tail_object_offset))
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- found_last = true;
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-
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n_objects ++;
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r = journal_file_object_verify(f, p, o);
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@@ -1148,13 +1149,15 @@ int journal_file_verify(
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n_weird ++;
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}
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- if (p == le64toh(f->header->tail_object_offset))
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- p = 0;
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- else
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- p = p + ALIGN64(le64toh(o->object.size));
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- }
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+ if (p == le64toh(f->header->tail_object_offset)) {
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+ found_last = true;
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+ break;
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+ }
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- if (!found_last) {
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+ p = p + ALIGN64(le64toh(o->object.size));
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+ };
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+
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+ if (!found_last && le64toh(f->header->tail_object_offset) != 0) {
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error(le64toh(f->header->tail_object_offset), "tail object pointer dead");
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r = -EBADMSG;
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goto fail;
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@@ -1200,19 +1203,7 @@ int journal_file_verify(
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goto fail;
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}
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- if (n_data_hash_tables != 1) {
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- error(0, "missing data hash table");
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- r = -EBADMSG;
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- goto fail;
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- }
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-
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- if (n_field_hash_tables != 1) {
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- error(0, "missing field hash table");
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- r = -EBADMSG;
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- goto fail;
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- }
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-
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- if (!found_main_entry_array) {
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+ if (!found_main_entry_array && le64toh(f->header->entry_array_offset) != 0) {
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error(0, "missing entry array");
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r = -EBADMSG;
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goto fail;
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