2 * blktrace output analysis: generate a timeline & gather statistics
4 * Copyright (C) 2006 Alan D. Brunelle <Alan.Brunelle@hp.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 static inline void cvt_pdu_remap(struct blk_io_trace_remap *rp)
25 rp->device = be32_to_cpu(rp->device);
26 rp->device_from = be32_to_cpu(rp->device_from);
27 rp->sector = be64_to_cpu(rp->sector);
31 * q_iop == volume device
32 * a_iop == underlying device
34 void trace_remap(struct io *a_iop)
38 struct blk_io_trace_remap *rp;
46 a_iop->t.device = rp->device_from;
47 if (!io_setup(a_iop, IOP_A))
50 q_dip = __dip_find(rp->device);
54 q_iop = dip_find_sec(q_dip, IOP_Q, rp->sector);
56 update_q2a(q_iop, tdelta(q_iop->t.time, a_iop->t.time));