journal_callback_set

Name

journal_callback_set --  Register a callback function for this handle.

Synopsis

void journal_callback_set (handle_t * handle, void (*func) (struct journal_callback *jcb, int error), struct journal_callback * jcb);

Arguments

handle

handle to attach the callback to.

func

function to callback.

jcb

structure with additional information required by func , and some space for jbd internal information.

Description

The function will be called when the transaction that this handle is part of has been committed to disk with the original callback data struct and the error status of the journal as parameters. There is no guarantee of ordering between handles within a single transaction, nor between callbacks registered on the same handle.

The caller is responsible for allocating the journal_callback struct. This is to allow the caller to add as much extra data to the callback as needed, but reduce the overhead of multiple allocations. The caller allocated struct must start with a struct journal_callback at offset 0, and has the caller-specific data afterwards.