projects / blktrace.git / blame
| Commit | Line | Data |
|---|---|---|
| 095181f2 JA |
1 | /* |
| 2 | * blktrace output analysis: generate a timeline & gather statistics | |
| 3 | * | |
| 4 | * Copyright (C) 2006 Alan D. Brunelle <Alan.Brunelle@hp.com> | |
| 5 | * | |
| 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. | |
| 10 | * | |
| 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. | |
| 15 | * | |
| 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 | |
| 19 | * | |
| 20 | */ | |
| 21 | #include "globals.h" | |
| 22 | ||
| 77f256cd | 23 | static inline void cvt_pdu_remap(struct blk_io_trace_remap *rp) |
| 095181f2 | 24 | { |
| 77f256cd AB |
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); | |
| 095181f2 JA |
28 | } |
| 29 | ||
| 77f256cd AB |
30 | /* |
| 31 | * q_iop == volume device | |
| 32 | * a_iop == underlying device | |
| 33 | */ | |
| d76c5b81 | 34 | void trace_remap(struct io *a_iop) |
| 095181f2 | 35 | { |
| 77f256cd AB |
36 | struct io *q_iop; |
| 37 | struct d_info *q_dip; | |
| 095181f2 | 38 | struct blk_io_trace_remap *rp = a_iop->pdu; |
| 095181f2 | 39 | |
| 77f256cd AB |
40 | cvt_pdu_remap(rp); |
| 41 | ||
| 42 | a_iop->t.device = rp->device_from; | |
| 43 | if (!io_setup(a_iop, IOP_A)) | |
| 44 | goto out; | |
| 45 | ||
| 46 | q_dip = __dip_find(rp->device); | |
| 47 | if (!q_dip) | |
| 48 | goto out; | |
| 49 | ||
| 50 | q_iop = dip_find_sec(q_dip, IOP_Q, rp->sector); | |
| 51 | if (q_iop) | |
| 52 | update_q2a(q_iop, tdelta(q_iop->t.time, a_iop->t.time)); | |
| 095181f2 | 53 | |
| 77f256cd | 54 | out: |
| 4c48f14e | 55 | io_release(a_iop); |
| 095181f2 | 56 | } |