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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 | ||
23 | void trace_requeue(struct io *r_iop) | |
24 | { | |
25 | if (!io_setup(r_iop, IOP_R)) { | |
26 | io_release(r_iop); | |
27 | return; | |
28 | } | |
29 | ||
30 | if (ready_requeue(r_iop, r_iop)) | |
31 | run_requeue(r_iop); | |
32 | else | |
33 | add_retry(r_iop); | |
34 | } | |
35 | ||
36 | int retry_requeue(struct io *r_iop) | |
37 | { | |
38 | if (!ready_requeue(r_iop, r_iop)) | |
39 | return 0; | |
40 | ||
095181f2 JA |
41 | run_requeue(r_iop); |
42 | return 1; | |
43 | } | |
44 | ||
45 | int ready_requeue(struct io *r_iop, struct io *top) | |
46 | { | |
47 | struct io *d_iop = dip_find_sec(r_iop->dip, IOP_D, BIT_START(r_iop)); | |
48 | if (d_iop) | |
49 | return ready_issue(d_iop, top); | |
50 | return 0; | |
51 | } | |
52 | ||
53 | void run_requeue(struct io *r_iop) | |
54 | { | |
55 | LIST_HEAD(del_head); | |
56 | struct io *d_iop = dip_find_sec(r_iop->dip, IOP_D, BIT_START(r_iop)); | |
57 | ||
58 | __link(d_iop, r_iop); | |
59 | run_unissue(d_iop, &del_head); | |
60 | __unlink(d_iop, r_iop); | |
61 | ||
001b2633 | 62 | del_retry(r_iop); |
095181f2 JA |
63 | list_add_tail(&r_iop->f_head, &del_head); |
64 | release_iops(&del_head); | |
65 | } |