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7da5ef22 VCG |
1 | /* |
2 | * q_etf.c Earliest TxTime First (ETF). | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Authors: Vinicius Costa Gomes <vinicius.gomes@intel.com> | |
10 | * Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com> | |
11 | * | |
12 | */ | |
13 | ||
14 | #include <stdio.h> | |
15 | #include <stdlib.h> | |
16 | #include <unistd.h> | |
17 | #include <fcntl.h> | |
18 | #include <sys/ioctl.h> | |
19 | #include <sys/socket.h> | |
20 | #include <netinet/in.h> | |
21 | #include <arpa/inet.h> | |
22 | #include <string.h> | |
23 | ||
24 | #include "utils.h" | |
25 | #include "tc_util.h" | |
26 | ||
27 | #define CLOCKID_INVALID (-1) | |
28 | static const struct static_clockid { | |
29 | const char *name; | |
30 | clockid_t clockid; | |
31 | } clockids_sysv[] = { | |
32 | { "REALTIME", CLOCK_REALTIME }, | |
33 | { "TAI", CLOCK_TAI }, | |
34 | { "BOOTTIME", CLOCK_BOOTTIME }, | |
35 | { "MONOTONIC", CLOCK_MONOTONIC }, | |
36 | { NULL } | |
37 | }; | |
38 | ||
39 | static void explain(void) | |
40 | { | |
41 | fprintf(stderr, "Usage: ... etf delta NANOS clockid CLOCKID [offload] [deadline_mode]\n"); | |
42 | fprintf(stderr, "CLOCKID must be a valid SYS-V id (i.e. CLOCK_TAI)\n"); | |
43 | } | |
44 | ||
45 | static void explain1(const char *arg, const char *val) | |
46 | { | |
47 | fprintf(stderr, "etf: illegal value for \"%s\": \"%s\"\n", arg, val); | |
48 | } | |
49 | ||
50 | static void explain_clockid(const char *val) | |
51 | { | |
52 | fprintf(stderr, "etf: illegal value for \"clockid\": \"%s\".\n", val); | |
53 | fprintf(stderr, "It must be a valid SYS-V id (i.e. CLOCK_TAI)\n"); | |
54 | } | |
55 | ||
56 | static int get_clockid(__s32 *val, const char *arg) | |
57 | { | |
58 | const struct static_clockid *c; | |
59 | ||
60 | /* Drop the CLOCK_ prefix if that is being used. */ | |
61 | if (strcasestr(arg, "CLOCK_") != NULL) | |
62 | arg += sizeof("CLOCK_") - 1; | |
63 | ||
64 | for (c = clockids_sysv; c->name; c++) { | |
65 | if (strcasecmp(c->name, arg) == 0) { | |
66 | *val = c->clockid; | |
67 | ||
68 | return 0; | |
69 | } | |
70 | } | |
71 | ||
72 | return -1; | |
73 | } | |
74 | ||
75 | static const char* get_clock_name(clockid_t clockid) | |
76 | { | |
77 | const struct static_clockid *c; | |
78 | ||
79 | for (c = clockids_sysv; c->name; c++) { | |
80 | if (clockid == c->clockid) | |
81 | return c->name; | |
82 | } | |
83 | ||
84 | return "invalid"; | |
85 | } | |
86 | ||
87 | static int etf_parse_opt(struct qdisc_util *qu, int argc, | |
88 | char **argv, struct nlmsghdr *n, const char *dev) | |
89 | { | |
90 | struct tc_etf_qopt opt = { | |
91 | .clockid = CLOCKID_INVALID, | |
92 | }; | |
93 | struct rtattr *tail; | |
94 | ||
95 | while (argc > 0) { | |
96 | if (matches(*argv, "offload") == 0) { | |
97 | if (opt.flags & TC_ETF_OFFLOAD_ON) { | |
98 | fprintf(stderr, "etf: duplicate \"offload\" specification\n"); | |
99 | return -1; | |
100 | } | |
101 | ||
102 | opt.flags |= TC_ETF_OFFLOAD_ON; | |
103 | } else if (matches(*argv, "deadline_mode") == 0) { | |
104 | if (opt.flags & TC_ETF_DEADLINE_MODE_ON) { | |
105 | fprintf(stderr, "etf: duplicate \"deadline_mode\" specification\n"); | |
106 | return -1; | |
107 | } | |
108 | ||
109 | opt.flags |= TC_ETF_DEADLINE_MODE_ON; | |
110 | } else if (matches(*argv, "delta") == 0) { | |
111 | NEXT_ARG(); | |
112 | if (opt.delta) { | |
113 | fprintf(stderr, "etf: duplicate \"delta\" specification\n"); | |
114 | return -1; | |
115 | } | |
116 | if (get_s32(&opt.delta, *argv, 0)) { | |
117 | explain1("delta", *argv); | |
118 | return -1; | |
119 | } | |
120 | } else if (matches(*argv, "clockid") == 0) { | |
121 | NEXT_ARG(); | |
122 | if (opt.clockid != CLOCKID_INVALID) { | |
123 | fprintf(stderr, "etf: duplicate \"clockid\" specification\n"); | |
124 | return -1; | |
125 | } | |
126 | if (get_clockid(&opt.clockid, *argv)) { | |
127 | explain_clockid(*argv); | |
128 | return -1; | |
129 | } | |
130 | } else if (strcmp(*argv, "help") == 0) { | |
131 | explain(); | |
132 | return -1; | |
133 | } else { | |
134 | fprintf(stderr, "etf: unknown parameter \"%s\"\n", *argv); | |
135 | explain(); | |
136 | return -1; | |
137 | } | |
138 | argc--; argv++; | |
139 | } | |
140 | ||
141 | tail = NLMSG_TAIL(n); | |
142 | addattr_l(n, 1024, TCA_OPTIONS, NULL, 0); | |
143 | addattr_l(n, 2024, TCA_ETF_PARMS, &opt, sizeof(opt)); | |
144 | tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; | |
145 | return 0; | |
146 | } | |
147 | ||
148 | static int etf_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt) | |
149 | { | |
150 | struct rtattr *tb[TCA_ETF_MAX+1]; | |
151 | struct tc_etf_qopt *qopt; | |
152 | ||
153 | if (opt == NULL) | |
154 | return 0; | |
155 | ||
156 | parse_rtattr_nested(tb, TCA_ETF_MAX, opt); | |
157 | ||
158 | if (tb[TCA_ETF_PARMS] == NULL) | |
159 | return -1; | |
160 | ||
161 | qopt = RTA_DATA(tb[TCA_ETF_PARMS]); | |
162 | if (RTA_PAYLOAD(tb[TCA_ETF_PARMS]) < sizeof(*qopt)) | |
163 | return -1; | |
164 | ||
165 | print_string(PRINT_ANY, "clockid", "clockid %s ", | |
166 | get_clock_name(qopt->clockid)); | |
167 | ||
168 | print_uint(PRINT_ANY, "delta", "delta %d ", qopt->delta); | |
169 | print_string(PRINT_ANY, "offload", "offload %s ", | |
170 | (qopt->flags & TC_ETF_OFFLOAD_ON) ? "on" : "off"); | |
171 | print_string(PRINT_ANY, "deadline_mode", "deadline_mode %s", | |
172 | (qopt->flags & TC_ETF_DEADLINE_MODE_ON) ? "on" : "off"); | |
173 | ||
174 | return 0; | |
175 | } | |
176 | ||
177 | struct qdisc_util etf_qdisc_util = { | |
178 | .id = "etf", | |
179 | .parse_qopt = etf_parse_opt, | |
180 | .print_qopt = etf_print_opt, | |
181 | }; |