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authorYongqiang Yang <xiaoqiangnk@gmail.com>2011-11-19 13:34:29 +0400
committerJan Kara <jack@suse.cz>2011-11-22 04:20:53 +0400
commit8c111b3f56332a216b18cd57950bdf04ac8f2a98 (patch)
tree9295744be006082391c9bfeed2cabf43b29cc4ea /include/linux/jbd.h
parent63894ab9f63a688f6b0b8cdd01ac0a9f36d507b8 (diff)
downloadlinux-8c111b3f56332a216b18cd57950bdf04ac8f2a98.tar.xz
jbd: clear revoked flag on buffers before a new transaction started
Currently, we clear revoked flag only when a block is reused. However, this can tigger a false journal error. Consider a situation when a block is used as a meta block and is deleted(revoked) in ordered mode, then the block is allocated as a data block to a file. At this moment, user changes the file's journal mode from ordered to journaled and truncates the file. The block will be considered re-revoked by journal because it has revoked flag still pending from the last transaction and an assertion triggers. We fix the problem by keeping the revoked status more uptodate - we clear revoked flag when switching revoke tables to reflect there is no revoked buffers in current transaction any more. Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'include/linux/jbd.h')
-rw-r--r--include/linux/jbd.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/jbd.h b/include/linux/jbd.h
index c7acdde3243d..492cc12244fd 100644
--- a/include/linux/jbd.h
+++ b/include/linux/jbd.h
@@ -913,6 +913,7 @@ extern int journal_set_revoke(journal_t *, unsigned int, tid_t);
extern int journal_test_revoke(journal_t *, unsigned int, tid_t);
extern void journal_clear_revoke(journal_t *);
extern void journal_switch_revoke_table(journal_t *journal);
+extern void journal_clear_buffer_revoked_flags(journal_t *journal);
/*
* The log thread user interface: