JBD2_JOURNAL_DIRTY_M(9)             The Linux Journalling API             JBD2_JOURNAL_DIRTY_M(9)



NAME
       jbd2_journal_dirty_metadata - mark a buffer as containing dirty metadata

SYNOPSIS
       int jbd2_journal_dirty_metadata(handle_t * handle, struct buffer_head * bh);

ARGUMENTS
       handle
           transaction to add buffer to.

       bh
           buffer to mark

DESCRIPTION
       mark dirty metadata which needs to be journaled as part of the current transaction.

       The buffer must have previously had jbd2_journal_get_write_access called so that it has a
       valid journal_head attached to the buffer head.

       The buffer is placed on the transaction's metadata list and is marked as belonging to the
       transaction.

       Returns error number or 0 on success.

       Special care needs to be taken if the buffer already belongs to the current committing
       transaction (in which case we should have frozen data present for that commit). In that
       case, we don't relink the buffer: that only gets done when the old transaction finally
       completes its commit.

AUTHORS
       Roger Gammans <rgammans AT computer-surgery.uk>
           Author.

       Stephen Tweedie <sct AT redhat.com>
           Author.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                   JBD2_JOURNAL_DIRTY_M(9)