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-rw-r--r--fs/jbd2/transaction.c47
1 files changed, 47 insertions, 0 deletions
diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index 39b7805a599a..4f925a4f3d05 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -741,6 +741,12 @@ done:
source = kmap_atomic(page, KM_USER0);
memcpy(jh->b_frozen_data, source+offset, jh2bh(jh)->b_size);
kunmap_atomic(source, KM_USER0);
+
+ /*
+ * Now that the frozen data is saved off, we need to store
+ * any matching triggers.
+ */
+ jh->b_frozen_triggers = jh->b_triggers;
}
jbd_unlock_bh_state(bh);
@@ -944,6 +950,47 @@ out:
}
/**
+ * void jbd2_journal_set_triggers() - Add triggers for commit writeout
+ * @bh: buffer to trigger on
+ * @type: struct jbd2_buffer_trigger_type containing the trigger(s).
+ *
+ * Set any triggers on this journal_head. This is always safe, because
+ * triggers for a committing buffer will be saved off, and triggers for
+ * a running transaction will match the buffer in that transaction.
+ *
+ * Call with NULL to clear the triggers.
+ */
+void jbd2_journal_set_triggers(struct buffer_head *bh,
+ struct jbd2_buffer_trigger_type *type)
+{
+ struct journal_head *jh = bh2jh(bh);
+
+ jh->b_triggers = type;
+}
+
+void jbd2_buffer_commit_trigger(struct journal_head *jh, void *mapped_data,
+ struct jbd2_buffer_trigger_type *triggers)
+{
+ struct buffer_head *bh = jh2bh(jh);
+
+ if (!triggers || !triggers->t_commit)
+ return;
+
+ triggers->t_commit(triggers, bh, mapped_data, bh->b_size);
+}
+
+void jbd2_buffer_abort_trigger(struct journal_head *jh,
+ struct jbd2_buffer_trigger_type *triggers)
+{
+ if (!triggers || !triggers->t_abort)
+ return;
+
+ triggers->t_abort(triggers, jh2bh(jh));
+}
+
+
+
+/**
* int jbd2_journal_dirty_metadata() - mark a buffer as containing dirty metadata
* @handle: transaction to add buffer to.
* @bh: buffer to mark