lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Sat, 25 Feb 2017 22:29:17 +0100 (CET) From: Jiri Kosina <jikos@...nel.org> To: "David S. Miller" <davem@...emloft.net>, Stephen Hemminger <stephen@...workplumber.org>, Eric Dumazet <eric.dumazet@...il.com>, Jamal Hadi Salim <jhs@...atatu.com>, Phil Sutter <phil@....cc>, Cong Wang <xiyou.wangcong@...il.com>, Daniel Borkmann <daniel@...earbox.net> cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH 2/2] iproute2: add support for invisible qdisc dumping From: Jiri Kosina <jkosina@...e.cz> Support the new TCA_DUMP_INVISIBLE netlink attribute that allows asking kernel to perform 'full qdisc dump', as for historical reasons some of the default qdiscs are being hidden by the kernel. The command syntax is being extended by voluntary 'invisible' argument to 'tc qdisc show'. Signed-off-by: Jiri Kosina <jkosina@...e.cz> --- tc/tc_qdisc.c | 25 +++++++++++++++++++++++-- 1 file changed, 23 insertions(+), 2 deletions(-) diff --git a/tc/tc_qdisc.c b/tc/tc_qdisc.c index 3a3701c2..29da9269 100644 --- a/tc/tc_qdisc.c +++ b/tc/tc_qdisc.c @@ -34,7 +34,7 @@ static int usage(void) fprintf(stderr, " [ stab [ help | STAB_OPTIONS] ]\n"); fprintf(stderr, " [ [ QDISC_KIND ] [ help | OPTIONS ] ]\n"); fprintf(stderr, "\n"); - fprintf(stderr, " tc qdisc show [ dev STRING ] [ ingress | clsact ]\n"); + fprintf(stderr, " tc qdisc show [ dev STRING ] [ ingress | clsact | invisible ]\n"); fprintf(stderr, "Where:\n"); fprintf(stderr, "QDISC_KIND := { [p|b]fifo | tbf | prio | cbq | red | etc. }\n"); fprintf(stderr, "OPTIONS := ... try tc qdisc add <desired QDISC_KIND> help\n"); @@ -292,6 +292,7 @@ static int tc_qdisc_list(int argc, char **argv) { struct tcmsg t = { .tcm_family = AF_UNSPEC }; char d[16] = {}; + bool dump_invisible = false; while (argc > 0) { if (strcmp(*argv, "dev") == 0) { @@ -306,6 +307,8 @@ static int tc_qdisc_list(int argc, char **argv) t.tcm_parent = TC_H_INGRESS; } else if (matches(*argv, "help") == 0) { usage(); + } else if (strcmp(*argv, "invisible") == 0) { + dump_invisible = true; } else { fprintf(stderr, "What is \"%s\"? Try \"tc qdisc help\".\n", *argv); return -1; @@ -325,7 +328,25 @@ static int tc_qdisc_list(int argc, char **argv) filter_ifindex = t.tcm_ifindex; } - if (rtnl_dump_request(&rth, RTM_GETQDISC, &t, sizeof(t)) < 0) { + if (dump_invisible) { + struct { + struct nlmsghdr n; + struct tcmsg t; + char buf[256]; + } req = { + .n.nlmsg_type = RTM_GETQDISC, + .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)), + }; + + req.t.tcm_family = AF_UNSPEC; + + addattr(&req.n, 256, TCA_DUMP_INVISIBLE); + if (rtnl_dump_request_n(&rth, &req.n) < 0) { + perror("Cannot send dump request"); + return 1; + } + + } else if (rtnl_dump_request(&rth, RTM_GETQDISC, &t, sizeof(t)) < 0) { perror("Cannot send dump request"); return 1; } -- Jiri Kosina SUSE Labs
Powered by blists - more mailing lists