2019-05-27 14:55:01 +08:00
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// SPDX-License-Identifier: GPL-2.0-or-later
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2005-04-17 06:20:36 +08:00
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/* net/sched/sch_teql.c "True" (or "trivial") link equalizer.
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*
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* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 16:04:11 +08:00
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#include <linux/slab.h>
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2005-04-17 06:20:36 +08:00
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#include <linux/string.h>
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#include <linux/errno.h>
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2005-12-27 12:43:12 +08:00
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#include <linux/if_arp.h>
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2005-04-17 06:20:36 +08:00
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#include <linux/netdevice.h>
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#include <linux/init.h>
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#include <linux/skbuff.h>
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#include <linux/moduleparam.h>
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2007-07-03 13:49:07 +08:00
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#include <net/dst.h>
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#include <net/neighbour.h>
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2005-04-17 06:20:36 +08:00
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#include <net/pkt_sched.h>
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/*
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How to setup it.
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----------------
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After loading this module you will find a new device teqlN
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and new qdisc with the same name. To join a slave to the equalizer
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you should just set this qdisc on a device f.e.
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# tc qdisc add dev eth0 root teql0
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# tc qdisc add dev eth1 root teql0
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That's all. Full PnP 8)
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Applicability.
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--------------
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1. Slave devices MUST be active devices, i.e., they must raise the tbusy
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signal and generate EOI events. If you want to equalize virtual devices
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like tunnels, use a normal eql device.
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2. This device puts no limitations on physical slave characteristics
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f.e. it will equalize 9600baud line and 100Mb ethernet perfectly :-)
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Certainly, large difference in link speeds will make the resulting
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eqalized link unusable, because of huge packet reordering.
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I estimate an upper useful difference as ~10 times.
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3. If the slave requires address resolution, only protocols using
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neighbour cache (IPv4/IPv6) will work over the equalized link.
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Other protocols are still allowed to use the slave device directly,
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which will not break load balancing, though native slave
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traffic will have the highest priority. */
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2011-01-20 03:26:56 +08:00
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struct teql_master {
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2005-04-17 06:20:36 +08:00
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struct Qdisc_ops qops;
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struct net_device *dev;
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struct Qdisc *slaves;
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struct list_head master_list;
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2011-01-12 20:13:14 +08:00
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unsigned long tx_bytes;
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unsigned long tx_packets;
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unsigned long tx_errors;
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unsigned long tx_dropped;
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2005-04-17 06:20:36 +08:00
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};
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2011-01-20 03:26:56 +08:00
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struct teql_sched_data {
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2005-04-17 06:20:36 +08:00
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struct Qdisc *next;
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struct teql_master *m;
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struct sk_buff_head q;
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};
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2011-01-20 03:26:56 +08:00
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#define NEXT_SLAVE(q) (((struct teql_sched_data *)qdisc_priv(q))->next)
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2005-04-17 06:20:36 +08:00
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2011-01-20 03:26:56 +08:00
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#define FMASK (IFF_BROADCAST | IFF_POINTOPOINT)
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2005-04-17 06:20:36 +08:00
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/* "teql*" qdisc routines */
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static int
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2016-06-22 14:16:49 +08:00
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teql_enqueue(struct sk_buff *skb, struct Qdisc *sch, struct sk_buff **to_free)
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2005-04-17 06:20:36 +08:00
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{
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2008-07-09 08:06:30 +08:00
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struct net_device *dev = qdisc_dev(sch);
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2005-04-17 06:20:36 +08:00
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struct teql_sched_data *q = qdisc_priv(sch);
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2007-05-09 09:57:50 +08:00
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if (q->q.qlen < dev->tx_queue_len) {
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__skb_queue_tail(&q->q, skb);
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2010-08-10 16:45:40 +08:00
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return NET_XMIT_SUCCESS;
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2005-04-17 06:20:36 +08:00
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}
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2016-06-22 14:16:49 +08:00
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return qdisc_drop(skb, sch, to_free);
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2005-04-17 06:20:36 +08:00
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}
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static struct sk_buff *
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2011-01-20 03:26:56 +08:00
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teql_dequeue(struct Qdisc *sch)
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2005-04-17 06:20:36 +08:00
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{
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struct teql_sched_data *dat = qdisc_priv(sch);
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2008-07-09 08:42:10 +08:00
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struct netdev_queue *dat_queue;
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2005-04-17 06:20:36 +08:00
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struct sk_buff *skb;
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2014-09-13 11:04:52 +08:00
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struct Qdisc *q;
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2005-04-17 06:20:36 +08:00
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skb = __skb_dequeue(&dat->q);
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2008-07-17 15:34:19 +08:00
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dat_queue = netdev_get_tx_queue(dat->m->dev, 0);
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2014-09-13 11:04:52 +08:00
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q = rcu_dereference_bh(dat_queue->qdisc);
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2005-04-17 06:20:36 +08:00
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if (skb == NULL) {
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2014-09-13 11:04:52 +08:00
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struct net_device *m = qdisc_dev(q);
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2005-04-17 06:20:36 +08:00
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if (m) {
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dat->m->slaves = sch;
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netif_wake_queue(m);
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}
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2011-01-21 15:31:33 +08:00
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} else {
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qdisc_bstats_update(sch, skb);
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2005-04-17 06:20:36 +08:00
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}
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2014-09-13 11:04:52 +08:00
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sch->q.qlen = dat->q.qlen + q->q.qlen;
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2005-04-17 06:20:36 +08:00
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return skb;
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}
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2008-10-31 15:45:55 +08:00
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static struct sk_buff *
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2011-01-20 03:26:56 +08:00
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teql_peek(struct Qdisc *sch)
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2008-10-31 15:45:55 +08:00
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{
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/* teql is meant to be used as root qdisc */
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return NULL;
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}
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2005-04-17 06:20:36 +08:00
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static void
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2011-01-20 03:26:56 +08:00
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teql_reset(struct Qdisc *sch)
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2005-04-17 06:20:36 +08:00
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{
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struct teql_sched_data *dat = qdisc_priv(sch);
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skb_queue_purge(&dat->q);
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}
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static void
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2011-01-20 03:26:56 +08:00
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teql_destroy(struct Qdisc *sch)
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2005-04-17 06:20:36 +08:00
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{
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struct Qdisc *q, *prev;
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struct teql_sched_data *dat = qdisc_priv(sch);
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struct teql_master *master = dat->m;
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2021-04-08 23:14:31 +08:00
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if (!master)
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return;
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2011-01-20 03:26:56 +08:00
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prev = master->slaves;
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if (prev) {
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2005-04-17 06:20:36 +08:00
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do {
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q = NEXT_SLAVE(prev);
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if (q == sch) {
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NEXT_SLAVE(prev) = NEXT_SLAVE(q);
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if (q == master->slaves) {
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master->slaves = NEXT_SLAVE(q);
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if (q == master->slaves) {
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2008-07-17 15:34:19 +08:00
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struct netdev_queue *txq;
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2008-07-17 15:53:03 +08:00
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spinlock_t *root_lock;
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2008-07-17 15:34:19 +08:00
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txq = netdev_get_tx_queue(master->dev, 0);
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2005-04-17 06:20:36 +08:00
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master->slaves = NULL;
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2008-07-17 15:53:03 +08:00
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2014-09-13 11:04:52 +08:00
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root_lock = qdisc_root_sleeping_lock(rtnl_dereference(txq->qdisc));
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2008-07-17 15:53:03 +08:00
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spin_lock_bh(root_lock);
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2014-09-13 11:04:52 +08:00
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qdisc_reset(rtnl_dereference(txq->qdisc));
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2008-07-17 15:53:03 +08:00
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spin_unlock_bh(root_lock);
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2005-04-17 06:20:36 +08:00
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}
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}
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skb_queue_purge(&dat->q);
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break;
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}
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2007-02-09 22:25:16 +08:00
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2005-04-17 06:20:36 +08:00
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} while ((prev = q) != master->slaves);
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}
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}
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2017-12-21 01:35:13 +08:00
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static int teql_qdisc_init(struct Qdisc *sch, struct nlattr *opt,
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struct netlink_ext_ack *extack)
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2005-04-17 06:20:36 +08:00
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{
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2008-07-09 08:06:30 +08:00
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struct net_device *dev = qdisc_dev(sch);
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2011-01-20 03:26:56 +08:00
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struct teql_master *m = (struct teql_master *)sch->ops;
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2005-04-17 06:20:36 +08:00
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struct teql_sched_data *q = qdisc_priv(sch);
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if (dev->hard_header_len > m->dev->hard_header_len)
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return -EINVAL;
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if (m->dev == dev)
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return -ELOOP;
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q->m = m;
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skb_queue_head_init(&q->q);
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if (m->slaves) {
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if (m->dev->flags & IFF_UP) {
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2009-11-30 08:55:45 +08:00
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if ((m->dev->flags & IFF_POINTOPOINT &&
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!(dev->flags & IFF_POINTOPOINT)) ||
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(m->dev->flags & IFF_BROADCAST &&
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!(dev->flags & IFF_BROADCAST)) ||
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(m->dev->flags & IFF_MULTICAST &&
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!(dev->flags & IFF_MULTICAST)) ||
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dev->mtu < m->dev->mtu)
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2005-04-17 06:20:36 +08:00
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return -EINVAL;
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} else {
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if (!(dev->flags&IFF_POINTOPOINT))
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m->dev->flags &= ~IFF_POINTOPOINT;
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if (!(dev->flags&IFF_BROADCAST))
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m->dev->flags &= ~IFF_BROADCAST;
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if (!(dev->flags&IFF_MULTICAST))
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m->dev->flags &= ~IFF_MULTICAST;
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if (dev->mtu < m->dev->mtu)
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m->dev->mtu = dev->mtu;
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}
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q->next = NEXT_SLAVE(m->slaves);
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NEXT_SLAVE(m->slaves) = sch;
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} else {
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q->next = sch;
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m->slaves = sch;
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m->dev->mtu = dev->mtu;
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m->dev->flags = (m->dev->flags&~FMASK)|(dev->flags&FMASK);
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}
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return 0;
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}
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static int
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2011-11-30 12:08:58 +08:00
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__teql_resolve(struct sk_buff *skb, struct sk_buff *skb_res,
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struct net_device *dev, struct netdev_queue *txq,
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2012-07-03 12:57:45 +08:00
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struct dst_entry *dst)
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2005-04-17 06:20:36 +08:00
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{
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2012-07-03 12:57:45 +08:00
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struct neighbour *n;
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int err = 0;
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2005-04-17 06:20:36 +08:00
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2012-07-03 12:57:45 +08:00
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n = dst_neigh_lookup_skb(dst, skb);
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if (!n)
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return -ENOENT;
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if (dst->dev != dev) {
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struct neighbour *mn;
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mn = __neigh_lookup_errno(n->tbl, n->primary_key, dev);
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neigh_release(n);
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if (IS_ERR(mn))
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return PTR_ERR(mn);
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n = mn;
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2005-04-17 06:20:36 +08:00
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}
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2012-07-03 12:57:45 +08:00
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2005-04-17 06:20:36 +08:00
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if (neigh_event_send(n, skb_res) == 0) {
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int err;
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2010-10-07 18:44:07 +08:00
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char haddr[MAX_ADDR_LEN];
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2007-10-09 16:36:32 +08:00
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2010-10-07 18:44:07 +08:00
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neigh_ha_snapshot(haddr, n, dev);
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sched: consistently handle layer3 header accesses in the presence of VLANs
There are a couple of places in net/sched/ that check skb->protocol and act
on the value there. However, in the presence of VLAN tags, the value stored
in skb->protocol can be inconsistent based on whether VLAN acceleration is
enabled. The commit quoted in the Fixes tag below fixed the users of
skb->protocol to use a helper that will always see the VLAN ethertype.
However, most of the callers don't actually handle the VLAN ethertype, but
expect to find the IP header type in the protocol field. This means that
things like changing the ECN field, or parsing diffserv values, stops
working if there's a VLAN tag, or if there are multiple nested VLAN
tags (QinQ).
To fix this, change the helper to take an argument that indicates whether
the caller wants to skip the VLAN tags or not. When skipping VLAN tags, we
make sure to skip all of them, so behaviour is consistent even in QinQ
mode.
To make the helper usable from the ECN code, move it to if_vlan.h instead
of pkt_sched.h.
v3:
- Remove empty lines
- Move vlan variable definitions inside loop in skb_protocol()
- Also use skb_protocol() helper in IP{,6}_ECN_decapsulate() and
bpf_skb_ecn_set_ce()
v2:
- Use eth_type_vlan() helper in skb_protocol()
- Also fix code that reads skb->protocol directly
- Change a couple of 'if/else if' statements to switch constructs to avoid
calling the helper twice
Reported-by: Ilya Ponetayev <i.ponetaev@ndmsystems.com>
Fixes: d8b9605d2697 ("net: sched: fix skb->protocol use in case of accelerated vlan path")
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-04 04:26:43 +08:00
|
|
|
err = dev_hard_header(skb, dev, ntohs(skb_protocol(skb, false)),
|
2015-01-14 00:13:43 +08:00
|
|
|
haddr, NULL, skb->len);
|
2007-10-09 16:36:32 +08:00
|
|
|
|
2012-07-03 12:57:45 +08:00
|
|
|
if (err < 0)
|
|
|
|
err = -EINVAL;
|
|
|
|
} else {
|
|
|
|
err = (skb_res == NULL) ? -EAGAIN : 1;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
neigh_release(n);
|
2012-07-03 12:57:45 +08:00
|
|
|
return err;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2007-10-09 16:40:57 +08:00
|
|
|
static inline int teql_resolve(struct sk_buff *skb,
|
2011-11-30 12:08:58 +08:00
|
|
|
struct sk_buff *skb_res,
|
|
|
|
struct net_device *dev,
|
|
|
|
struct netdev_queue *txq)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2011-11-30 12:08:58 +08:00
|
|
|
struct dst_entry *dst = skb_dst(skb);
|
|
|
|
int res;
|
|
|
|
|
2014-09-13 11:04:52 +08:00
|
|
|
if (rcu_access_pointer(txq->qdisc) == &noop_qdisc)
|
2007-11-06 19:08:09 +08:00
|
|
|
return -ENODEV;
|
|
|
|
|
2011-11-30 12:08:58 +08:00
|
|
|
if (!dev->header_ops || !dst)
|
2005-04-17 06:20:36 +08:00
|
|
|
return 0;
|
2011-11-30 12:08:58 +08:00
|
|
|
|
|
|
|
rcu_read_lock();
|
2012-07-03 12:57:45 +08:00
|
|
|
res = __teql_resolve(skb, skb_res, dev, txq, dst);
|
2011-11-30 12:08:58 +08:00
|
|
|
rcu_read_unlock();
|
|
|
|
|
|
|
|
return res;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2009-09-01 03:50:41 +08:00
|
|
|
static netdev_tx_t teql_master_xmit(struct sk_buff *skb, struct net_device *dev)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2006-01-09 14:05:26 +08:00
|
|
|
struct teql_master *master = netdev_priv(dev);
|
2005-04-17 06:20:36 +08:00
|
|
|
struct Qdisc *start, *q;
|
|
|
|
int busy;
|
|
|
|
int nores;
|
2007-10-22 08:01:29 +08:00
|
|
|
int subq = skb_get_queue_mapping(skb);
|
2005-04-17 06:20:36 +08:00
|
|
|
struct sk_buff *skb_res = NULL;
|
|
|
|
|
|
|
|
start = master->slaves;
|
|
|
|
|
|
|
|
restart:
|
|
|
|
nores = 0;
|
|
|
|
busy = 0;
|
|
|
|
|
2011-01-20 03:26:56 +08:00
|
|
|
q = start;
|
|
|
|
if (!q)
|
2005-04-17 06:20:36 +08:00
|
|
|
goto drop;
|
|
|
|
|
|
|
|
do {
|
2008-07-09 08:06:30 +08:00
|
|
|
struct net_device *slave = qdisc_dev(q);
|
2009-01-07 02:45:57 +08:00
|
|
|
struct netdev_queue *slave_txq = netdev_get_tx_queue(slave, 0);
|
2007-02-09 22:25:16 +08:00
|
|
|
|
2008-07-17 15:34:19 +08:00
|
|
|
if (slave_txq->qdisc_sleeping != q)
|
2005-04-17 06:20:36 +08:00
|
|
|
continue;
|
2011-11-29 00:32:44 +08:00
|
|
|
if (netif_xmit_stopped(netdev_get_tx_queue(slave, subq)) ||
|
2007-07-07 04:36:20 +08:00
|
|
|
!netif_running(slave)) {
|
2005-04-17 06:20:36 +08:00
|
|
|
busy = 1;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2011-11-30 12:08:58 +08:00
|
|
|
switch (teql_resolve(skb, skb_res, slave, slave_txq)) {
|
2005-04-17 06:20:36 +08:00
|
|
|
case 0:
|
2008-08-01 07:58:50 +08:00
|
|
|
if (__netif_tx_trylock(slave_txq)) {
|
2009-05-19 06:12:31 +08:00
|
|
|
unsigned int length = qdisc_pkt_len(skb);
|
|
|
|
|
2011-11-29 00:32:44 +08:00
|
|
|
if (!netif_xmit_frozen_or_stopped(slave_txq) &&
|
2014-08-30 12:55:22 +08:00
|
|
|
netdev_start_xmit(skb, slave, slave_txq, false) ==
|
|
|
|
NETDEV_TX_OK) {
|
2008-08-01 07:58:50 +08:00
|
|
|
__netif_tx_unlock(slave_txq);
|
2005-04-17 06:20:36 +08:00
|
|
|
master->slaves = NEXT_SLAVE(q);
|
|
|
|
netif_wake_queue(dev);
|
2011-01-12 20:13:14 +08:00
|
|
|
master->tx_packets++;
|
|
|
|
master->tx_bytes += length;
|
2009-06-23 14:03:08 +08:00
|
|
|
return NETDEV_TX_OK;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2008-08-01 07:58:50 +08:00
|
|
|
__netif_tx_unlock(slave_txq);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2011-11-29 00:32:44 +08:00
|
|
|
if (netif_xmit_stopped(netdev_get_tx_queue(dev, 0)))
|
2005-04-17 06:20:36 +08:00
|
|
|
busy = 1;
|
|
|
|
break;
|
|
|
|
case 1:
|
|
|
|
master->slaves = NEXT_SLAVE(q);
|
2009-06-23 14:03:08 +08:00
|
|
|
return NETDEV_TX_OK;
|
2005-04-17 06:20:36 +08:00
|
|
|
default:
|
|
|
|
nores = 1;
|
|
|
|
break;
|
|
|
|
}
|
2007-03-11 09:16:10 +08:00
|
|
|
__skb_pull(skb, skb_network_offset(skb));
|
2005-04-17 06:20:36 +08:00
|
|
|
} while ((q = NEXT_SLAVE(q)) != start);
|
|
|
|
|
|
|
|
if (nores && skb_res == NULL) {
|
|
|
|
skb_res = skb;
|
|
|
|
goto restart;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (busy) {
|
|
|
|
netif_stop_queue(dev);
|
2009-06-12 14:22:29 +08:00
|
|
|
return NETDEV_TX_BUSY;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2011-01-12 20:13:14 +08:00
|
|
|
master->tx_errors++;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
drop:
|
2011-01-12 20:13:14 +08:00
|
|
|
master->tx_dropped++;
|
2005-04-17 06:20:36 +08:00
|
|
|
dev_kfree_skb(skb);
|
2009-06-23 14:03:08 +08:00
|
|
|
return NETDEV_TX_OK;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static int teql_master_open(struct net_device *dev)
|
|
|
|
{
|
2011-01-20 03:26:56 +08:00
|
|
|
struct Qdisc *q;
|
2006-01-09 14:05:26 +08:00
|
|
|
struct teql_master *m = netdev_priv(dev);
|
2005-04-17 06:20:36 +08:00
|
|
|
int mtu = 0xFFFE;
|
2011-01-20 03:26:56 +08:00
|
|
|
unsigned int flags = IFF_NOARP | IFF_MULTICAST;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
if (m->slaves == NULL)
|
|
|
|
return -EUNATCH;
|
|
|
|
|
|
|
|
flags = FMASK;
|
|
|
|
|
|
|
|
q = m->slaves;
|
|
|
|
do {
|
2008-07-09 08:06:30 +08:00
|
|
|
struct net_device *slave = qdisc_dev(q);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
if (slave == NULL)
|
|
|
|
return -EUNATCH;
|
|
|
|
|
|
|
|
if (slave->mtu < mtu)
|
|
|
|
mtu = slave->mtu;
|
|
|
|
if (slave->hard_header_len > LL_MAX_HEADER)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
/* If all the slaves are BROADCAST, master is BROADCAST
|
|
|
|
If all the slaves are PtP, master is PtP
|
|
|
|
Otherwise, master is NBMA.
|
|
|
|
*/
|
|
|
|
if (!(slave->flags&IFF_POINTOPOINT))
|
|
|
|
flags &= ~IFF_POINTOPOINT;
|
|
|
|
if (!(slave->flags&IFF_BROADCAST))
|
|
|
|
flags &= ~IFF_BROADCAST;
|
|
|
|
if (!(slave->flags&IFF_MULTICAST))
|
|
|
|
flags &= ~IFF_MULTICAST;
|
|
|
|
} while ((q = NEXT_SLAVE(q)) != m->slaves);
|
|
|
|
|
|
|
|
m->dev->mtu = mtu;
|
|
|
|
m->dev->flags = (m->dev->flags&~FMASK) | flags;
|
|
|
|
netif_start_queue(m->dev);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int teql_master_close(struct net_device *dev)
|
|
|
|
{
|
|
|
|
netif_stop_queue(dev);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2017-01-07 11:12:52 +08:00
|
|
|
static void teql_master_stats64(struct net_device *dev,
|
|
|
|
struct rtnl_link_stats64 *stats)
|
2011-01-12 20:13:14 +08:00
|
|
|
{
|
|
|
|
struct teql_master *m = netdev_priv(dev);
|
|
|
|
|
|
|
|
stats->tx_packets = m->tx_packets;
|
|
|
|
stats->tx_bytes = m->tx_bytes;
|
|
|
|
stats->tx_errors = m->tx_errors;
|
|
|
|
stats->tx_dropped = m->tx_dropped;
|
|
|
|
}
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
static int teql_master_mtu(struct net_device *dev, int new_mtu)
|
|
|
|
{
|
2006-01-09 14:05:26 +08:00
|
|
|
struct teql_master *m = netdev_priv(dev);
|
2005-04-17 06:20:36 +08:00
|
|
|
struct Qdisc *q;
|
|
|
|
|
|
|
|
q = m->slaves;
|
|
|
|
if (q) {
|
|
|
|
do {
|
2008-07-09 08:06:30 +08:00
|
|
|
if (new_mtu > qdisc_dev(q)->mtu)
|
2005-04-17 06:20:36 +08:00
|
|
|
return -EINVAL;
|
2011-01-20 03:26:56 +08:00
|
|
|
} while ((q = NEXT_SLAVE(q)) != m->slaves);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
dev->mtu = new_mtu;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-01-07 02:45:57 +08:00
|
|
|
static const struct net_device_ops teql_netdev_ops = {
|
|
|
|
.ndo_open = teql_master_open,
|
|
|
|
.ndo_stop = teql_master_close,
|
|
|
|
.ndo_start_xmit = teql_master_xmit,
|
2011-01-12 20:13:14 +08:00
|
|
|
.ndo_get_stats64 = teql_master_stats64,
|
2009-01-07 02:45:57 +08:00
|
|
|
.ndo_change_mtu = teql_master_mtu,
|
|
|
|
};
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
static __init void teql_master_setup(struct net_device *dev)
|
|
|
|
{
|
2006-01-09 14:05:26 +08:00
|
|
|
struct teql_master *master = netdev_priv(dev);
|
2005-04-17 06:20:36 +08:00
|
|
|
struct Qdisc_ops *ops = &master->qops;
|
|
|
|
|
|
|
|
master->dev = dev;
|
|
|
|
ops->priv_size = sizeof(struct teql_sched_data);
|
2007-02-09 22:25:16 +08:00
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
ops->enqueue = teql_enqueue;
|
|
|
|
ops->dequeue = teql_dequeue;
|
2008-10-31 15:45:55 +08:00
|
|
|
ops->peek = teql_peek;
|
2005-04-17 06:20:36 +08:00
|
|
|
ops->init = teql_qdisc_init;
|
|
|
|
ops->reset = teql_reset;
|
|
|
|
ops->destroy = teql_destroy;
|
|
|
|
ops->owner = THIS_MODULE;
|
|
|
|
|
2009-01-07 02:45:57 +08:00
|
|
|
dev->netdev_ops = &teql_netdev_ops;
|
2005-04-17 06:20:36 +08:00
|
|
|
dev->type = ARPHRD_VOID;
|
|
|
|
dev->mtu = 1500;
|
net: use core MTU range checking in core net infra
geneve:
- Merge __geneve_change_mtu back into geneve_change_mtu, set max_mtu
- This one isn't quite as straight-forward as others, could use some
closer inspection and testing
macvlan:
- set min/max_mtu
tun:
- set min/max_mtu, remove tun_net_change_mtu
vxlan:
- Merge __vxlan_change_mtu back into vxlan_change_mtu
- Set max_mtu to IP_MAX_MTU and retain dynamic MTU range checks in
change_mtu function
- This one is also not as straight-forward and could use closer inspection
and testing from vxlan folks
bridge:
- set max_mtu of IP_MAX_MTU and retain dynamic MTU range checks in
change_mtu function
openvswitch:
- set min/max_mtu, remove internal_dev_change_mtu
- note: max_mtu wasn't checked previously, it's been set to 65535, which
is the largest possible size supported
sch_teql:
- set min/max_mtu (note: max_mtu previously unchecked, used max of 65535)
macsec:
- min_mtu = 0, max_mtu = 65535
macvlan:
- min_mtu = 0, max_mtu = 65535
ntb_netdev:
- min_mtu = 0, max_mtu = 65535
veth:
- min_mtu = 68, max_mtu = 65535
8021q:
- min_mtu = 0, max_mtu = 65535
CC: netdev@vger.kernel.org
CC: Nicolas Dichtel <nicolas.dichtel@6wind.com>
CC: Hannes Frederic Sowa <hannes@stressinduktion.org>
CC: Tom Herbert <tom@herbertland.com>
CC: Daniel Borkmann <daniel@iogearbox.net>
CC: Alexander Duyck <alexander.h.duyck@intel.com>
CC: Paolo Abeni <pabeni@redhat.com>
CC: Jiri Benc <jbenc@redhat.com>
CC: WANG Cong <xiyou.wangcong@gmail.com>
CC: Roopa Prabhu <roopa@cumulusnetworks.com>
CC: Pravin B Shelar <pshelar@ovn.org>
CC: Sabrina Dubroca <sd@queasysnail.net>
CC: Patrick McHardy <kaber@trash.net>
CC: Stephen Hemminger <stephen@networkplumber.org>
CC: Pravin Shelar <pshelar@nicira.com>
CC: Maxim Krasnyansky <maxk@qti.qualcomm.com>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-21 01:55:20 +08:00
|
|
|
dev->min_mtu = 68;
|
|
|
|
dev->max_mtu = 65535;
|
2005-04-17 06:20:36 +08:00
|
|
|
dev->tx_queue_len = 100;
|
|
|
|
dev->flags = IFF_NOARP;
|
|
|
|
dev->hard_header_len = LL_MAX_HEADER;
|
2014-10-06 09:38:35 +08:00
|
|
|
netif_keep_dst(dev);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static LIST_HEAD(master_dev_list);
|
|
|
|
static int max_equalizers = 1;
|
|
|
|
module_param(max_equalizers, int, 0);
|
|
|
|
MODULE_PARM_DESC(max_equalizers, "Max number of link equalizers");
|
|
|
|
|
|
|
|
static int __init teql_init(void)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
int err = -ENODEV;
|
|
|
|
|
|
|
|
for (i = 0; i < max_equalizers; i++) {
|
|
|
|
struct net_device *dev;
|
|
|
|
struct teql_master *master;
|
|
|
|
|
net: set name_assign_type in alloc_netdev()
Extend alloc_netdev{,_mq{,s}}() to take name_assign_type as argument, and convert
all users to pass NET_NAME_UNKNOWN.
Coccinelle patch:
@@
expression sizeof_priv, name, setup, txqs, rxqs, count;
@@
(
-alloc_netdev_mqs(sizeof_priv, name, setup, txqs, rxqs)
+alloc_netdev_mqs(sizeof_priv, name, NET_NAME_UNKNOWN, setup, txqs, rxqs)
|
-alloc_netdev_mq(sizeof_priv, name, setup, count)
+alloc_netdev_mq(sizeof_priv, name, NET_NAME_UNKNOWN, setup, count)
|
-alloc_netdev(sizeof_priv, name, setup)
+alloc_netdev(sizeof_priv, name, NET_NAME_UNKNOWN, setup)
)
v9: move comments here from the wrong commit
Signed-off-by: Tom Gundersen <teg@jklm.no>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-14 22:37:24 +08:00
|
|
|
dev = alloc_netdev(sizeof(struct teql_master), "teql%d",
|
|
|
|
NET_NAME_UNKNOWN, teql_master_setup);
|
2005-04-17 06:20:36 +08:00
|
|
|
if (!dev) {
|
|
|
|
err = -ENOMEM;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if ((err = register_netdev(dev))) {
|
|
|
|
free_netdev(dev);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2006-01-09 14:05:26 +08:00
|
|
|
master = netdev_priv(dev);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2022-08-19 05:02:28 +08:00
|
|
|
strscpy(master->qops.id, dev->name, IFNAMSIZ);
|
2005-04-17 06:20:36 +08:00
|
|
|
err = register_qdisc(&master->qops);
|
|
|
|
|
|
|
|
if (err) {
|
|
|
|
unregister_netdev(dev);
|
|
|
|
free_netdev(dev);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
list_add_tail(&master->master_list, &master_dev_list);
|
|
|
|
}
|
|
|
|
return i ? 0 : err;
|
|
|
|
}
|
|
|
|
|
2007-02-09 22:25:16 +08:00
|
|
|
static void __exit teql_exit(void)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
struct teql_master *master, *nxt;
|
|
|
|
|
|
|
|
list_for_each_entry_safe(master, nxt, &master_dev_list, master_list) {
|
|
|
|
|
|
|
|
list_del(&master->master_list);
|
|
|
|
|
|
|
|
unregister_qdisc(&master->qops);
|
|
|
|
unregister_netdev(master->dev);
|
|
|
|
free_netdev(master->dev);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
module_init(teql_init);
|
|
|
|
module_exit(teql_exit);
|
|
|
|
|
|
|
|
MODULE_LICENSE("GPL");
|