1 /**************************************************************************/
2 /* ---------------------------------------------------------------------- */
3 /* Copyright (C) 2006 - 2008 FRESCOR consortium partners: */
5 /* Universidad de Cantabria, SPAIN */
6 /* University of York, UK */
7 /* Scuola Superiore Sant'Anna, ITALY */
8 /* Kaiserslautern University, GERMANY */
9 /* Univ. Politécnica Valencia, SPAIN */
10 /* Czech Technical University in Prague, CZECH REPUBLIC */
12 /* Thales Communication S.A. FRANCE */
13 /* Visual Tools S.A. SPAIN */
14 /* Rapita Systems Ltd UK */
17 /* See http://www.frescor.org for a link to partners' websites */
19 /* FRESCOR project (FP6/2005/IST/5-034026) is funded */
20 /* in part by the European Union Sixth Framework Programme */
21 /* The European Union is not liable of any use that may be */
22 /* made of this code. */
25 /* This file is part of FRSH (FRescor ScHeduler) */
27 /* FRSH is free software; you can redistribute it and/or modify it */
28 /* under terms of the GNU General Public License as published by the */
29 /* Free Software Foundation; either version 2, or (at your option) any */
30 /* later version. FRSH is distributed in the hope that it will be */
31 /* useful, but WITHOUT ANY WARRANTY; without even the implied warranty */
32 /* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU */
33 /* General Public License for more details. You should have received a */
34 /* copy of the GNU General Public License along with FRSH; see file */
35 /* COPYING. If not, write to the Free Software Foundation, 675 Mass Ave, */
36 /* Cambridge, MA 02139, USA. */
38 /* As a special exception, including FRSH header files in a file, */
39 /* instantiating FRSH generics or templates, or linking other files */
40 /* with FRSH objects to produce an executable application, does not */
41 /* by itself cause the resulting executable application to be covered */
42 /* by the GNU General Public License. This exception does not */
43 /* however invalidate any other reasons why the executable file might be */
44 /* covered by the GNU Public License. */
45 /**************************************************************************/
49 * @author Dario Faggioli <faggioli@gandalf.sssup.it>
51 * @brief Disk resource declarations
60 #include <linux/unistd.h>
61 #include <sys/syscall.h>
62 #include <asm/unistd.h>
66 #include <res_disk_idl.h>
67 #include <fres_contract.h>
68 #include <fres_container.h>
78 IOPRIO_WHO_PROCESS = 1,
83 #define IOPRIO_CLASS_SHIFT 13
86 * Why all these can't be config parameters?
88 //#define SYSFS_BFQ_NAME CONFIG_DISKBFQ_SCHED_NAME /* default = "bfq" */
89 //#define SYSFS_BFQ_BASIC_PATH CONFIG_DISKBFQ_QUEUE_PATH /* default = "/sys/class/block/%s/queue" */
90 //#define SYSFS_BFQ_SCHED_PATH CONFIG_DISKBFQ_QUEUE_PATH CONFIG_DISKBFQ_SCHED_PATH
91 //#define SYSFS_BFQ_BUDGET_PATH CONFIG_DISKBFQ_QUEUE_PATH CONFIG_DISKBFQ_BUDGET_PATH /* default = CONFIG_DISKBFQ_QUEUE_PATH "iosched/budget" */
92 #define SYSFS_BFQ_NAME "bfq"
93 #define SYSFS_BFQ_BASIC_PATH "/sys/block/%s/queue/"
94 #define SYSFS_BFQ_SCHED_PATH SYSFS_BFQ_BASIC_PATH "scheduler"
95 #define SYSFS_BFQ_BUDGET_PATH SYSFS_BFQ_BASIC_PATH "iosched/max_budget"
97 #define DISKBFQ_WEIGHT_MAX 100
99 #define IOPRIO_PRIO_DEFAULT 4
100 #define IOPRIO_CLASS_DEFAULT IOPRIO_CLASS_BE
101 #define DISKBFQ_IOPRIO_DEFAULT \
102 (IOPRIO_PRIO_DEFAULT || (IOPRIO_CLASS_DEFAULT << IOPRIO_CLASS_SHIFT))
104 int fra_disk_init(void);
105 int fres_block_register_disk_sched(void);
107 /* Define fres_container_(add|get|del)_disk_sched. */
108 FRES_CONTAINER_ACCESSOR(DISK_SCHED, disk_sched);
110 /* Define fres_contract_(add|get|del)_disk_sched. */
111 FRES_CONTRACT_ACCESSOR(disk_sched);