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a879e1a4 YW |
1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
2 | ||
3 | #include <errno.h> | |
4 | ||
5 | #include "sd-event.h" | |
6 | #include "sd-netlink.h" | |
7 | ||
6a1af3d4 | 8 | #include "networkd-link-bus.h" |
a879e1a4 YW |
9 | #include "networkd-link.h" |
10 | #include "networkd-manager.h" | |
11 | #include "networkd-speed-meter.h" | |
12 | ||
13 | static int process_message(Manager *manager, sd_netlink_message *message) { | |
14 | uint16_t type; | |
15 | int ifindex, r; | |
16 | Link *link; | |
17 | ||
18 | r = sd_netlink_message_get_type(message, &type); | |
19 | if (r < 0) | |
20 | return r; | |
21 | ||
22 | if (type != RTM_NEWLINK) | |
23 | return 0; | |
24 | ||
25 | r = sd_rtnl_message_link_get_ifindex(message, &ifindex); | |
26 | if (r < 0) | |
27 | return r; | |
28 | ||
29 | link = hashmap_get(manager->links, INT_TO_PTR(ifindex)); | |
30 | if (!link) | |
31 | return -ENODEV; | |
32 | ||
33 | link->stats_old = link->stats_new; | |
34 | ||
35 | r = sd_netlink_message_read(message, IFLA_STATS64, sizeof link->stats_new, &link->stats_new); | |
36 | if (r < 0) | |
37 | return r; | |
38 | ||
39 | link->stats_updated = true; | |
40 | ||
41 | return 0; | |
42 | } | |
43 | ||
44 | static int speed_meter_handler(sd_event_source *s, uint64_t usec, void *userdata) { | |
45 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL; | |
46 | Manager *manager = userdata; | |
47 | sd_netlink_message *i; | |
48 | usec_t usec_now; | |
49 | Iterator j; | |
50 | Link *link; | |
51 | int r; | |
52 | ||
53 | assert(s); | |
54 | assert(userdata); | |
55 | ||
56 | r = sd_event_now(sd_event_source_get_event(s), CLOCK_MONOTONIC, &usec_now); | |
57 | if (r < 0) | |
58 | return r; | |
59 | ||
60 | r = sd_event_source_set_time(s, usec_now + manager->speed_meter_interval_usec); | |
61 | if (r < 0) | |
62 | return r; | |
63 | ||
64 | manager->speed_meter_usec_old = manager->speed_meter_usec_new; | |
65 | manager->speed_meter_usec_new = usec_now; | |
66 | ||
67 | HASHMAP_FOREACH(link, manager->links, j) | |
68 | link->stats_updated = false; | |
69 | ||
70 | r = sd_rtnl_message_new_link(manager->rtnl, &req, RTM_GETLINK, 0); | |
71 | if (r < 0) { | |
72 | log_warning_errno(r, "Failed to allocate RTM_GETLINK netlink message, ignoring: %m"); | |
73 | return 0; | |
74 | } | |
75 | ||
76 | r = sd_netlink_message_request_dump(req, true); | |
77 | if (r < 0) { | |
78 | log_warning_errno(r, "Failed to set dump flag, ignoring: %m"); | |
79 | return 0; | |
80 | } | |
81 | ||
82 | r = sd_netlink_call(manager->rtnl, req, 0, &reply); | |
83 | if (r < 0) { | |
84 | log_warning_errno(r, "Failed to call RTM_GETLINK, ignoring: %m"); | |
85 | return 0; | |
86 | } | |
87 | ||
88 | for (i = reply; i; i = sd_netlink_message_next(i)) | |
89 | (void) process_message(manager, i); | |
90 | ||
91 | return 0; | |
92 | } | |
93 | ||
94 | int manager_start_speed_meter(Manager *manager) { | |
95 | _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; | |
96 | int r; | |
97 | ||
98 | assert(manager); | |
99 | assert(manager->event); | |
100 | ||
101 | if (!manager->use_speed_meter) | |
102 | return 0; | |
103 | ||
104 | r = sd_event_add_time(manager->event, &s, CLOCK_MONOTONIC, 0, 0, speed_meter_handler, manager); | |
105 | if (r < 0) | |
106 | return r; | |
107 | ||
108 | r = sd_event_source_set_enabled(s, SD_EVENT_ON); | |
109 | if (r < 0) | |
110 | return r; | |
111 | ||
112 | manager->speed_meter_event_source = TAKE_PTR(s); | |
113 | return 0; | |
114 | } |