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Date: Sat, 25 Feb 2017 16:59:00 +0000
From: Zaboj Campula <zaboj.campula@...t.cz>
To: netdev@...r.kernel.org
Cc: Zaboj Campula <zaboj.campula@...t.cz>
Subject: [PATCH] iproute2: show network device dependency tree
Add the argument '-tree' to ip-link to show network devices dependency tree.
Example:
$ ip -tree link
eth0
bond0
eth1
bond0
eth2
bond1
eth3
bond1
Signed-off-by: Zaboj Campula <zaboj.campula@...t.cz>
---
include/utils.h | 1 +
ip/ip.c | 5 ++-
ip/ipaddress.c | 97 ++++++++++++++++++++++++++++++++++++++++++++++++---------
3 files changed, 87 insertions(+), 16 deletions(-)
diff --git a/include/utils.h b/include/utils.h
index 22369e0..f1acf4d 100644
--- a/include/utils.h
+++ b/include/utils.h
@@ -20,6 +20,7 @@ extern int show_raw;
extern int resolve_hosts;
extern int oneline;
extern int brief;
+extern int tree;;
extern int timestamp;
extern int timestamp_short;
extern const char * _SL_;
diff --git a/ip/ip.c b/ip/ip.c
index 07050b0..29747a5 100644
--- a/ip/ip.c
+++ b/ip/ip.c
@@ -33,6 +33,7 @@ int show_details;
int resolve_hosts;
int oneline;
int brief;
+int tree;
int timestamp;
const char *_SL_;
int force;
@@ -57,7 +58,7 @@ static void usage(void)
" -h[uman-readable] | -iec |\n"
" -f[amily] { inet | inet6 | ipx | dnet | mpls | bridge | link } |\n"
" -4 | -6 | -I | -D | -B | -0 |\n"
-" -l[oops] { maximum-addr-flush-attempts } | -br[ief] |\n"
+" -l[oops] { maximum-addr-flush-attempts } | -br[ief] | -tr[ee] |\n"
" -o[neline] | -t[imestamp] | -ts[hort] | -b[atch] [filename] |\n"
" -rc[vbuf] [size] | -n[etns] name | -a[ll] | -c[olor]}\n");
exit(-1);
@@ -257,6 +258,8 @@ int main(int argc, char **argv)
batch_file = argv[1];
} else if (matches(opt, "-brief") == 0) {
++brief;
+ } else if (matches(opt, "-tree") == 0) {
+ ++tree;
} else if (matches(opt, "-rcvbuf") == 0) {
unsigned int size;
diff --git a/ip/ipaddress.c b/ip/ipaddress.c
index 242c6ea..5ebcb1a 100644
--- a/ip/ipaddress.c
+++ b/ip/ipaddress.c
@@ -1534,6 +1534,69 @@ static int iplink_filter_req(struct nlmsghdr *nlh, int reqlen)
return 0;
}
+static int has_master(struct nlmsg_chain *linfo, int index)
+{
+ struct nlmsg_list *l;
+ struct rtattr *tb[IFLA_MAX+1];
+ int len;
+ for (l = linfo->head; l; l = l->next) {
+ struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
+ len = l->h.nlmsg_len;
+ len -= NLMSG_LENGTH(sizeof(*ifi));
+ parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len);
+ if (tb[IFLA_MASTER] && *(int *)RTA_DATA(tb[IFLA_MASTER]) == index)
+ return 1;
+ }
+ return 0;
+}
+
+static struct nlmsg_list *get_master(struct nlmsg_chain *linfo, struct rtattr **tb)
+{
+ struct nlmsg_list *l;
+ if (tb[IFLA_MASTER]) {
+ int master = *(int *)RTA_DATA(tb[IFLA_MASTER]);
+ for (l = linfo->head; l; l = l->next) {
+ struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
+ if (ifi->ifi_index == master)
+ return l;
+ }
+ }
+ return NULL;
+}
+
+static void print_dev_tree_item(struct nlmsg_chain *linfo, struct nlmsg_list *l, int indent) {
+ char *name;
+ int len;
+ struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
+ struct rtattr *tb[IFLA_MAX+1];
+ len = l->h.nlmsg_len;
+ len -= NLMSG_LENGTH(sizeof(*ifi));
+ parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len);
+ name = (char *)(tb[IFLA_IFNAME] ? rta_getattr_str(tb[IFLA_IFNAME]) : "<nil>");
+
+ printf("%*s%s\n", indent * 4, "", name);
+
+ struct nlmsg_list *master = get_master(linfo, tb);
+ if (master) {
+ if (indent > 8) {
+ printf("%*s...\n", (indent + 1) * 4, "");
+ } else {
+ print_dev_tree_item(linfo, master, indent + 1);
+ }
+ }
+}
+
+static void print_devtree(struct nlmsg_chain *linfo)
+{
+ struct nlmsg_list *l;
+ for (l = linfo->head; l; l = l->next) {
+ struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
+ if (!has_master(linfo, ifi->ifi_index)) {
+ print_dev_tree_item(linfo, l, 0);
+ }
+ }
+}
+
static int ipaddr_list_flush_or_save(int argc, char **argv, int action)
{
struct nlmsg_chain linfo = { NULL, NULL};
@@ -1742,23 +1805,27 @@ static int ipaddr_list_flush_or_save(int argc, char **argv, int action)
ipaddr_filter(&linfo, &ainfo);
}
- for (l = linfo.head; l; l = l->next) {
- int res = 0;
- struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
-
- if (brief) {
- if (print_linkinfo_brief(NULL, &l->h, stdout) == 0)
+ if (tree) {
+ print_devtree(&linfo);
+ } else {
+ for (l = linfo.head; l; l = l->next) {
+ int res = 0;
+ struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
+
+ if (brief) {
+ if (print_linkinfo_brief(NULL, &l->h, stdout) == 0)
+ if (filter.family != AF_PACKET)
+ print_selected_addrinfo(ifi,
+ ainfo.head,
+ stdout);
+ } else if (no_link ||
+ (res = print_linkinfo(NULL, &l->h, stdout)) >= 0) {
if (filter.family != AF_PACKET)
print_selected_addrinfo(ifi,
- ainfo.head,
- stdout);
- } else if (no_link ||
- (res = print_linkinfo(NULL, &l->h, stdout)) >= 0) {
- if (filter.family != AF_PACKET)
- print_selected_addrinfo(ifi,
- ainfo.head, stdout);
- if (res > 0 && !do_link && show_stats)
- print_link_stats(stdout, &l->h);
+ ainfo.head, stdout);
+ if (res > 0 && !do_link && show_stats)
+ print_link_stats(stdout, &l->h);
+ }
}
}
fflush(stdout);
--
2.9.3
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