2 * Copyright (C) 2005-2010 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file filter_common.c Common helper functions for filter input/output. */
10 #include <sys/types.h>
19 #include "buffer_tree.h"
24 /** The array of supported filters. */
25 struct filter filters[NUM_SUPPORTED_FILTERS] = {FILTER_ARRAY};
28 * Call the init function of each supported filter.
31 void filter_init(void)
35 FOR_EACH_SUPPORTED_FILTER(i)
36 filters[i].init(filters + i);
40 * If the filter has a command line parser and options is not NULL, run it.
41 * Returns filter_num on success, negative on errors
43 static int parse_filter_args(int filter_num, char *options, void **conf)
45 struct filter *f = &filters[filter_num];
49 // PARA_DEBUG_LOG("%s, options: %s, parser: %p\n", f->name,
50 // options? options : "(none)", f->parse_config);
52 return strlen(options)? -E_BAD_FILTER_OPTIONS : filter_num;
53 // PARA_DEBUG_LOG("options: %s\n", options);
54 argc = create_argv(options, " \t", &argv);
56 return -E_BAD_FILTER_OPTIONS;
57 PARA_DEBUG_LOG("argc = %d, argv[0]: %s\n", argc, argv[0]);
58 for (i = argc - 1; i >= 0; i--)
59 argv[i + 1] = argv[i];
60 argv[0] = para_strdup(f->name);
62 ret = f->parse_config(argc, argv, conf);
64 argv[argc - 1] = NULL;
66 return ret < 0? ret : filter_num;
70 * Check the filter command line options.
72 * \param fa The command line options.
73 * \param conf Points to the filter configuration upon successful return.
75 * Check if \a fa starts with a the name of a supported filter, followed by
76 * a colon. If yes, call the command line parser of that filter.
78 * \return On success, the number of the filter is returned and \a conf
79 * is initialized to point to the filter configuration determined by \a fa.
80 * On errors, a negative value is returned.
82 * Note: If \a fa specifies a filter that has no command line parser success is
83 * returned, and \a conf is initialized to \p NULL.
85 * \sa filter::parse_config
87 int check_filter_arg(char *fa, void **conf)
92 // PARA_DEBUG_LOG("arg: %s\n", fa);
93 FOR_EACH_SUPPORTED_FILTER(j) {
94 const char *name = filters[j].name;
95 size_t len = strlen(name);
99 if (strncmp(name, fa, len))
104 if (c && !filters[j].parse_config)
105 return -E_BAD_FILTER_OPTIONS;
106 return parse_filter_args(j, c? fa + len + 1 :
107 fa + strlen(fa), conf);
109 return -E_UNSUPPORTED_FILTER;
112 void print_filter_helps(int detailed)
116 printf_or_die("\nAvailable filters: \n\t");
117 FOR_EACH_SUPPORTED_FILTER(i)
118 printf_or_die("%s%s", i? " " : "", filters[i].name);
119 printf_or_die("\n\n");
121 FOR_EACH_SUPPORTED_FILTER(i) {
122 struct filter *f = filters + i;
124 if (!f->help.short_help)
126 printf_or_die("Options for %s:\n", f->name);
127 ggo_print_help(&f->help, detailed);
131 void generic_filter_pre_select(struct sched *s, struct task *t)
133 struct filter_node *fn = container_of(t, struct filter_node, task);
136 if (btr_node_status(fn->btrn, fn->min_iqs, BTR_NT_INTERNAL) != 0)