void gfs2_meta_wipe(struct gfs2_inode *ip, u64 bstart, u32 blen) { struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); struct buffer_head *bh; while (blen) { bh = gfs2_getbuf(ip->i_gl, bstart, NO_CREATE); if (bh) { lock_buffer(bh); gfs2_log_lock(sdp); gfs2_remove_from_journal(bh, current->journal_info, 1); gfs2_log_unlock(sdp); unlock_buffer(bh); brelse(bh); } bstart++; blen--; } }
static void gfs2_discard(struct gfs2_sbd *sdp, struct buffer_head *bh) { struct gfs2_bufdata *bd; lock_buffer(bh); gfs2_log_lock(sdp); clear_buffer_dirty(bh); bd = bh->b_private; if (bd) { if (!list_empty(&bd->bd_le.le_list) && !buffer_pinned(bh)) list_del_init(&bd->bd_le.le_list); else gfs2_remove_from_journal(bh, current->journal_info, 0); } bh->b_bdev = NULL; clear_buffer_mapped(bh); clear_buffer_req(bh); clear_buffer_new(bh); gfs2_log_unlock(sdp); unlock_buffer(bh); }