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authorTheodore Ts'o <tytso@mit.edu>2008-10-17 04:00:24 +0400
committerTheodore Ts'o <tytso@mit.edu>2008-10-17 04:00:24 +0400
commit3e624fc72fba09b6f999a9fbb87b64efccd38036 (patch)
treef0a1feac377788b27ea704519a33f367a6d415f9 /include/linux/jbd2.h
parent22359f5745eb26bd3205a1ede7968c8944398220 (diff)
downloadlinux-3e624fc72fba09b6f999a9fbb87b64efccd38036.tar.xz
ext4: Replace hackish ext4_mb_poll_new_transaction with commit callback
The multiblock allocator needs to be able to release blocks (and issue a blkdev discard request) when the transaction which freed those blocks is committed. Previously this was done via a polling mechanism when blocks are allocated or freed. A much better way of doing things is to create a jbd2 callback function and attaching the list of blocks to be freed directly to the transaction structure. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'include/linux/jbd2.h')
-rw-r--r--include/linux/jbd2.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
index 463d6f10b64f..c7d106ef22e2 100644
--- a/include/linux/jbd2.h
+++ b/include/linux/jbd2.h
@@ -641,6 +641,11 @@ struct transaction_s
*/
int t_handle_count;
+ /*
+ * For use by the filesystem to store fs-specific data
+ * structures associated with the transaction
+ */
+ struct list_head t_private_list;
};
struct transaction_run_stats_s {
@@ -935,6 +940,10 @@ struct journal_s
pid_t j_last_sync_writer;
+ /* This function is called when a transaction is closed */
+ void (*j_commit_callback)(journal_t *,
+ transaction_t *);
+
/*
* Journal statistics
*/