tc: Show classes in tree view

From: Vadim Kochan <[email protected]>

Date: Tue, 16 Dec 2014 22:59:30 +0200
Added new '-t[ree]' which shows classes dependency in the tree view. Meanwhile only generic stats info is supported.

e.g.:

$ tc/tc -t class show dev tap0
+---(1:2) htb rate 6Mbit ceil 6Mbit burst 15Kb cburst 1599b
|    +---(1:40) htb prio 0 rate 5Mbit ceil 5Mbit burst 15Kb cburst 1600b
|    +---(1:50) htb rate 3Mbit ceil 6Mbit burst 15Kb cburst 1599b
|    |    +---(1:51) htb prio 0 rate 1Kbit ceil 6Mbit burst 15Kb cburst 1599b
|    |
|    +---(1:60) htb prio 0 rate 1Kbit ceil 6Mbit burst 15Kb cburst 1599b
|
+---(1:1) htb rate 6Mbit ceil 6Mbit burst 15Kb cburst 1599b
     +---(1:10) htb prio 0 rate 5Mbit ceil 5Mbit burst 15Kb cburst 1600b
     +---(1:20) htb prio 0 rate 3Mbit ceil 6Mbit burst 15Kb cburst 1599b
     +---(1:30) htb prio 0 rate 1Kbit ceil 6Mbit burst 15Kb cburst 1599b

$ tc/tc -t -s class show dev tap0
+---(1:2) htb rate 6Mbit ceil 6Mbit burst 15Kb cburst 1599b
|    |    Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
|    |    rate 0bit 0pps backlog 0b 0p requeues 0
|    |
|    +---(1:40) htb prio 0 rate 5Mbit ceil 5Mbit burst 15Kb cburst 1600b
|    |          Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
|    |          rate 0bit 0pps backlog 0b 0p requeues 0
|    |
|    +---(1:50) htb rate 3Mbit ceil 6Mbit burst 15Kb cburst 1599b
|    |    |     Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
|    |    |     rate 0bit 0pps backlog 0b 0p requeues 0
|    |    |
|    |    +---(1:51) htb prio 0 rate 1Kbit ceil 6Mbit burst 15Kb cburst 1599b
|    |               Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
|    |               rate 0bit 0pps backlog 0b 0p requeues 0
|    |
|    +---(1:60) htb prio 0 rate 1Kbit ceil 6Mbit burst 15Kb cburst 1599b
|               Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
|               rate 0bit 0pps backlog 0b 0p requeues 0
|
+---(1:1) htb rate 6Mbit ceil 6Mbit burst 15Kb cburst 1599b
     |    Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
     |    rate 0bit 0pps backlog 0b 0p requeues 0
     |
     +---(1:10) htb prio 0 rate 5Mbit ceil 5Mbit burst 15Kb cburst 1600b
     |          Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
     |          rate 0bit 0pps backlog 0b 0p requeues 0
     |
     +---(1:20) htb prio 0 rate 3Mbit ceil 6Mbit burst 15Kb cburst 1599b
     |          Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
     |          rate 0bit 0pps backlog 0b 0p requeues 0
     |
     +---(1:30) htb prio 0 rate 1Kbit ceil 6Mbit burst 15Kb cburst 1599b
                Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
                rate 0bit 0pps backlog 0b 0p requeues 0

---
Changes RFC -> PATCH:
#1 get rid of INIT_HLIST_NODE
#2 added sample output to commit message
#3 use "show_tree=1" instead of "show_tree++"
#4 no need update include/hlist.h (because of #1)
#5 changed a little tree output: parentheses around class id instead of qdisc name

 tc/tc.c        |   5 +-
 tc/tc_class.c  | 165 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 tc/tc_common.h |   2 +
 3 files changed, 169 insertions(+), 3 deletions(-)

index 9b50e74..30950a6 100644
@@ -34,8 +34,9 @@ int show_stats = 0;
 int show_details = 0;
 int show_raw = 0;
 int show_pretty = 0;
-int batch_mode = 0;
+int show_tree = 0;
 
+int batch_mode = 0;
 int resolve_hosts = 0;
 int use_iec = 0;
 int force = 0;

@@ -278,6 +279,8 @@ int main(int argc, char **argv)
 			++show_raw;
 		} else if (matches(argv[1], "-pretty") == 0) {
 			++show_pretty;
+		} else if (matches(argv[1], "-tree") == 0) {
+			show_tree = 1;
 		} else if (matches(argv[1], "-Version") == 0) {
 			printf("tc utility, iproute2-ss%s\n", SNAPSHOT);
 			return 0;

index 4f88856..0ee009b 100644
@@ -19,3 +19,5 @@ extern int parse_estimator(int *p_argc, char ***p_argv, struct tc_estimator *est
 struct tc_sizespec;
 extern int parse_size_table(int *p_argc, char ***p_argv, struct tc_sizespec *s);
 extern int check_size_table_opts(struct tc_sizespec *s);
+
+extern int show_tree;

2.1.3