2019-05-29 08:12:43 -06:00
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// SPDX-License-Identifier: GPL-2.0-only
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2011-10-25 20:26:31 -06:00
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/*
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2014-09-15 20:20:31 -06:00
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* Copyright (c) 2007-2014 Nicira, Inc.
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2011-10-25 20:26:31 -06:00
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*/
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#include <linux/etherdevice.h>
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#include <linux/if.h>
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#include <linux/if_vlan.h>
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2012-02-22 20:58:59 -07:00
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#include <linux/jhash.h>
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2011-10-25 20:26:31 -06:00
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/mutex.h>
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#include <linux/percpu.h>
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#include <linux/rcupdate.h>
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#include <linux/rtnetlink.h>
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#include <linux/compat.h>
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2012-02-22 20:58:59 -07:00
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#include <net/net_namespace.h>
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2014-10-22 09:29:06 -06:00
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#include <linux/module.h>
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2011-10-25 20:26:31 -06:00
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2012-02-22 20:58:59 -07:00
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#include "datapath.h"
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2011-10-25 20:26:31 -06:00
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#include "vport.h"
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#include "vport-internal_dev.h"
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2014-10-22 09:29:06 -06:00
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static LIST_HEAD(vport_ops_list);
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2011-10-25 20:26:31 -06:00
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2013-04-15 14:23:03 -06:00
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/* Protected by RCU read lock for reading, ovs_mutex for writing. */
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2011-10-25 20:26:31 -06:00
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static struct hlist_head *dev_table;
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#define VPORT_HASH_BUCKETS 1024
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/**
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* ovs_vport_init - initialize vport subsystem
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*
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* Called at module load time to initialize the vport subsystem.
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*/
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int ovs_vport_init(void)
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{
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treewide: kzalloc() -> kcalloc()
The kzalloc() function has a 2-factor argument form, kcalloc(). This
patch replaces cases of:
kzalloc(a * b, gfp)
with:
kcalloc(a * b, gfp)
as well as handling cases of:
kzalloc(a * b * c, gfp)
with:
kzalloc(array3_size(a, b, c), gfp)
as it's slightly less ugly than:
kzalloc_array(array_size(a, b), c, gfp)
This does, however, attempt to ignore constant size factors like:
kzalloc(4 * 1024, gfp)
though any constants defined via macros get caught up in the conversion.
Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.
The Coccinelle script used for this was:
// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@
(
kzalloc(
- (sizeof(TYPE)) * E
+ sizeof(TYPE) * E
, ...)
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kzalloc(
- (sizeof(THING)) * E
+ sizeof(THING) * E
, ...)
)
// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@
(
kzalloc(
- sizeof(u8) * (COUNT)
+ COUNT
, ...)
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kzalloc(
- sizeof(__u8) * (COUNT)
+ COUNT
, ...)
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kzalloc(
- sizeof(char) * (COUNT)
+ COUNT
, ...)
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kzalloc(
- sizeof(unsigned char) * (COUNT)
+ COUNT
, ...)
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kzalloc(
- sizeof(u8) * COUNT
+ COUNT
, ...)
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kzalloc(
- sizeof(__u8) * COUNT
+ COUNT
, ...)
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kzalloc(
- sizeof(char) * COUNT
+ COUNT
, ...)
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kzalloc(
- sizeof(unsigned char) * COUNT
+ COUNT
, ...)
)
// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@
(
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_ID)
+ COUNT_ID, sizeof(TYPE)
, ...)
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- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_ID
+ COUNT_ID, sizeof(TYPE)
, ...)
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- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_CONST)
+ COUNT_CONST, sizeof(TYPE)
, ...)
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- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_CONST
+ COUNT_CONST, sizeof(TYPE)
, ...)
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- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_ID)
+ COUNT_ID, sizeof(THING)
, ...)
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- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_ID
+ COUNT_ID, sizeof(THING)
, ...)
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- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_CONST)
+ COUNT_CONST, sizeof(THING)
, ...)
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- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_CONST
+ COUNT_CONST, sizeof(THING)
, ...)
)
// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@
- kzalloc
+ kcalloc
(
- SIZE * COUNT
+ COUNT, SIZE
, ...)
// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@
(
kzalloc(
- sizeof(TYPE) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
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kzalloc(
- sizeof(TYPE) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
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kzalloc(
- sizeof(TYPE) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
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kzalloc(
- sizeof(TYPE) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
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kzalloc(
- sizeof(THING) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
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kzalloc(
- sizeof(THING) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
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kzalloc(
- sizeof(THING) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
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kzalloc(
- sizeof(THING) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
)
// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@
(
kzalloc(
- sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
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kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
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kzalloc(
- sizeof(THING1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
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kzalloc(
- sizeof(THING1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
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kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
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kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
)
// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@
(
kzalloc(
- (COUNT) * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
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kzalloc(
- COUNT * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
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kzalloc(
- COUNT * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
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kzalloc(
- (COUNT) * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
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kzalloc(
- COUNT * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
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kzalloc(
- (COUNT) * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
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kzalloc(
- (COUNT) * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
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kzalloc(
- COUNT * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
)
// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@
(
kzalloc(C1 * C2 * C3, ...)
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kzalloc(
- (E1) * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
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kzalloc(
- (E1) * (E2) * E3
+ array3_size(E1, E2, E3)
, ...)
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kzalloc(
- (E1) * (E2) * (E3)
+ array3_size(E1, E2, E3)
, ...)
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kzalloc(
- E1 * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
)
// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@
(
kzalloc(sizeof(THING) * C2, ...)
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kzalloc(sizeof(TYPE) * C2, ...)
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kzalloc(C1 * C2 * C3, ...)
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kzalloc(C1 * C2, ...)
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- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (E2)
+ E2, sizeof(TYPE)
, ...)
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- kzalloc
+ kcalloc
(
- sizeof(TYPE) * E2
+ E2, sizeof(TYPE)
, ...)
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- kzalloc
+ kcalloc
(
- sizeof(THING) * (E2)
+ E2, sizeof(THING)
, ...)
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- kzalloc
+ kcalloc
(
- sizeof(THING) * E2
+ E2, sizeof(THING)
, ...)
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- kzalloc
+ kcalloc
(
- (E1) * E2
+ E1, E2
, ...)
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- kzalloc
+ kcalloc
(
- (E1) * (E2)
+ E1, E2
, ...)
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- kzalloc
+ kcalloc
(
- E1 * E2
+ E1, E2
, ...)
)
Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-12 15:03:40 -06:00
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dev_table = kcalloc(VPORT_HASH_BUCKETS, sizeof(struct hlist_head),
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2011-10-25 20:26:31 -06:00
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GFP_KERNEL);
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if (!dev_table)
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return -ENOMEM;
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return 0;
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}
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/**
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* ovs_vport_exit - shutdown vport subsystem
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*
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* Called at module exit time to shutdown the vport subsystem.
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*/
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void ovs_vport_exit(void)
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{
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kfree(dev_table);
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}
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2014-11-06 07:58:52 -07:00
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static struct hlist_head *hash_bucket(const struct net *net, const char *name)
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2011-10-25 20:26:31 -06:00
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{
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2012-02-22 20:58:59 -07:00
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unsigned int hash = jhash(name, strlen(name), (unsigned long) net);
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2011-10-25 20:26:31 -06:00
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return &dev_table[hash & (VPORT_HASH_BUCKETS - 1)];
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}
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2015-11-30 04:31:43 -07:00
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int __ovs_vport_ops_register(struct vport_ops *ops)
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2014-10-22 09:29:06 -06:00
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{
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int err = -EEXIST;
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struct vport_ops *o;
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ovs_lock();
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list_for_each_entry(o, &vport_ops_list, list)
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if (ops->type == o->type)
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goto errout;
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list_add_tail(&ops->list, &vport_ops_list);
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err = 0;
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errout:
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ovs_unlock();
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return err;
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}
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2015-11-30 04:31:43 -07:00
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EXPORT_SYMBOL_GPL(__ovs_vport_ops_register);
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2014-10-22 09:29:06 -06:00
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void ovs_vport_ops_unregister(struct vport_ops *ops)
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{
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ovs_lock();
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list_del(&ops->list);
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ovs_unlock();
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}
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2014-11-06 07:44:27 -07:00
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EXPORT_SYMBOL_GPL(ovs_vport_ops_unregister);
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2014-10-22 09:29:06 -06:00
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2011-10-25 20:26:31 -06:00
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/**
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* ovs_vport_locate - find a port that has already been created
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*
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2020-07-12 17:15:09 -06:00
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* @net: network namespace
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2011-10-25 20:26:31 -06:00
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* @name: name of port to find
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*
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2013-04-15 14:23:03 -06:00
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* Must be called with ovs or RCU read lock.
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2011-10-25 20:26:31 -06:00
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*/
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2014-11-06 07:58:52 -07:00
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struct vport *ovs_vport_locate(const struct net *net, const char *name)
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2011-10-25 20:26:31 -06:00
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{
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2012-02-22 20:58:59 -07:00
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struct hlist_head *bucket = hash_bucket(net, name);
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2011-10-25 20:26:31 -06:00
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struct vport *vport;
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2020-02-18 12:57:42 -07:00
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hlist_for_each_entry_rcu(vport, bucket, hash_node,
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2020-09-01 06:26:12 -06:00
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lockdep_ovsl_is_held())
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2015-07-21 02:44:05 -06:00
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if (!strcmp(name, ovs_vport_name(vport)) &&
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2012-02-22 20:58:59 -07:00
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net_eq(ovs_dp_get_net(vport->dp), net))
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2011-10-25 20:26:31 -06:00
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return vport;
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return NULL;
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}
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/**
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* ovs_vport_alloc - allocate and initialize new vport
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*
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* @priv_size: Size of private data area to allocate.
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* @ops: vport device ops
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*
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* Allocate and initialize a new vport defined by @ops. The vport will contain
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* a private data area of size @priv_size that can be accessed using
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* vport_priv(). vports that are no longer needed should be released with
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* vport_free().
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*/
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struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *ops,
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2020-09-01 06:26:12 -06:00
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const struct vport_parms *parms)
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2011-10-25 20:26:31 -06:00
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{
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struct vport *vport;
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size_t alloc_size;
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alloc_size = sizeof(struct vport);
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if (priv_size) {
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alloc_size = ALIGN(alloc_size, VPORT_ALIGN);
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alloc_size += priv_size;
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}
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vport = kzalloc(alloc_size, GFP_KERNEL);
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if (!vport)
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return ERR_PTR(-ENOMEM);
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vport->dp = parms->dp;
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vport->port_no = parms->port_no;
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vport->ops = ops;
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2012-08-23 13:40:54 -06:00
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INIT_HLIST_NODE(&vport->dp_hash_node);
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2011-10-25 20:26:31 -06:00
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2014-08-12 01:27:57 -06:00
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if (ovs_vport_set_upcall_portids(vport, parms->upcall_portids)) {
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kfree(vport);
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2014-07-17 16:14:13 -06:00
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return ERR_PTR(-EINVAL);
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2014-08-12 01:27:57 -06:00
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}
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2014-07-17 16:14:13 -06:00
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2011-10-25 20:26:31 -06:00
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return vport;
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}
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2014-11-06 07:44:27 -07:00
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EXPORT_SYMBOL_GPL(ovs_vport_alloc);
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2011-10-25 20:26:31 -06:00
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/**
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* ovs_vport_free - uninitialize and free vport
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*
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* @vport: vport to free
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*
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* Frees a vport allocated with vport_alloc() when it is no longer needed.
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*
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* The caller must ensure that an RCU grace period has passed since the last
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* time @vport was in a datapath.
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*/
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void ovs_vport_free(struct vport *vport)
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{
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2014-07-17 16:14:13 -06:00
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/* vport is freed from RCU callback or error path, Therefore
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* it is safe to use raw dereference.
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*/
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kfree(rcu_dereference_raw(vport->upcall_portids));
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2011-10-25 20:26:31 -06:00
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kfree(vport);
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}
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2014-11-06 07:44:27 -07:00
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EXPORT_SYMBOL_GPL(ovs_vport_free);
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2014-10-22 09:29:06 -06:00
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static struct vport_ops *ovs_vport_lookup(const struct vport_parms *parms)
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{
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struct vport_ops *ops;
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list_for_each_entry(ops, &vport_ops_list, list)
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if (ops->type == parms->type)
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return ops;
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return NULL;
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}
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2011-10-25 20:26:31 -06:00
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/**
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* ovs_vport_add - add vport device (for kernel callers)
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*
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* @parms: Information about new vport.
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*
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* Creates a new vport with the specified configuration (which is dependent on
|
2013-04-15 14:23:03 -06:00
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* device type). ovs_mutex must be held.
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2011-10-25 20:26:31 -06:00
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*/
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struct vport *ovs_vport_add(const struct vport_parms *parms)
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{
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2014-10-22 09:29:06 -06:00
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struct vport_ops *ops;
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2011-10-25 20:26:31 -06:00
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struct vport *vport;
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2014-10-22 09:29:06 -06:00
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ops = ovs_vport_lookup(parms);
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if (ops) {
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struct hlist_head *bucket;
|
2012-02-22 20:58:59 -07:00
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2014-10-22 09:29:06 -06:00
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if (!try_module_get(ops->owner))
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|
return ERR_PTR(-EAFNOSUPPORT);
|
2011-10-25 20:26:31 -06:00
|
|
|
|
2014-10-22 09:29:06 -06:00
|
|
|
vport = ops->create(parms);
|
|
|
|
if (IS_ERR(vport)) {
|
|
|
|
module_put(ops->owner);
|
2011-10-25 20:26:31 -06:00
|
|
|
return vport;
|
|
|
|
}
|
2014-10-22 09:29:06 -06:00
|
|
|
|
|
|
|
bucket = hash_bucket(ovs_dp_get_net(vport->dp),
|
2015-07-21 02:44:05 -06:00
|
|
|
ovs_vport_name(vport));
|
2014-10-22 09:29:06 -06:00
|
|
|
hlist_add_head_rcu(&vport->hash_node, bucket);
|
|
|
|
return vport;
|
2011-10-25 20:26:31 -06:00
|
|
|
}
|
|
|
|
|
2014-10-22 09:29:06 -06:00
|
|
|
/* Unlock to attempt module load and return -EAGAIN if load
|
|
|
|
* was successful as we need to restart the port addition
|
|
|
|
* workflow.
|
|
|
|
*/
|
|
|
|
ovs_unlock();
|
|
|
|
request_module("vport-type-%d", parms->type);
|
|
|
|
ovs_lock();
|
2011-10-25 20:26:31 -06:00
|
|
|
|
2014-10-22 09:29:06 -06:00
|
|
|
if (!ovs_vport_lookup(parms))
|
|
|
|
return ERR_PTR(-EAFNOSUPPORT);
|
|
|
|
else
|
|
|
|
return ERR_PTR(-EAGAIN);
|
2011-10-25 20:26:31 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ovs_vport_set_options - modify existing vport device (for kernel callers)
|
|
|
|
*
|
|
|
|
* @vport: vport to modify.
|
2013-08-19 18:49:29 -06:00
|
|
|
* @options: New configuration.
|
2011-10-25 20:26:31 -06:00
|
|
|
*
|
|
|
|
* Modifies an existing device with the specified configuration (which is
|
2013-04-15 14:23:03 -06:00
|
|
|
* dependent on device type). ovs_mutex must be held.
|
2011-10-25 20:26:31 -06:00
|
|
|
*/
|
|
|
|
int ovs_vport_set_options(struct vport *vport, struct nlattr *options)
|
|
|
|
{
|
|
|
|
if (!vport->ops->set_options)
|
|
|
|
return -EOPNOTSUPP;
|
|
|
|
return vport->ops->set_options(vport, options);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ovs_vport_del - delete existing vport device
|
|
|
|
*
|
|
|
|
* @vport: vport to delete.
|
|
|
|
*
|
2015-11-24 11:51:53 -07:00
|
|
|
* Detaches @vport from its datapath and destroys it. ovs_mutex must
|
|
|
|
* be held.
|
2011-10-25 20:26:31 -06:00
|
|
|
*/
|
|
|
|
void ovs_vport_del(struct vport *vport)
|
|
|
|
{
|
|
|
|
hlist_del_rcu(&vport->hash_node);
|
2014-10-22 09:29:06 -06:00
|
|
|
module_put(vport->ops->owner);
|
2015-03-30 05:57:41 -06:00
|
|
|
vport->ops->destroy(vport);
|
2011-10-25 20:26:31 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ovs_vport_get_stats - retrieve device stats
|
|
|
|
*
|
|
|
|
* @vport: vport from which to retrieve the stats
|
|
|
|
* @stats: location to store stats
|
|
|
|
*
|
|
|
|
* Retrieves transmit, receive, and error stats for the given device.
|
|
|
|
*
|
2013-04-15 14:23:03 -06:00
|
|
|
* Must be called with ovs_mutex or rcu_read_lock.
|
2011-10-25 20:26:31 -06:00
|
|
|
*/
|
|
|
|
void ovs_vport_get_stats(struct vport *vport, struct ovs_vport_stats *stats)
|
|
|
|
{
|
2015-10-02 15:56:34 -06:00
|
|
|
const struct rtnl_link_stats64 *dev_stats;
|
|
|
|
struct rtnl_link_stats64 temp;
|
|
|
|
|
|
|
|
dev_stats = dev_get_stats(vport->dev, &temp);
|
|
|
|
stats->rx_errors = dev_stats->rx_errors;
|
|
|
|
stats->tx_errors = dev_stats->tx_errors;
|
|
|
|
stats->tx_dropped = dev_stats->tx_dropped;
|
|
|
|
stats->rx_dropped = dev_stats->rx_dropped;
|
|
|
|
|
|
|
|
stats->rx_bytes = dev_stats->rx_bytes;
|
|
|
|
stats->rx_packets = dev_stats->rx_packets;
|
|
|
|
stats->tx_bytes = dev_stats->tx_bytes;
|
|
|
|
stats->tx_packets = dev_stats->tx_packets;
|
2011-10-25 20:26:31 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ovs_vport_get_options - retrieve device options
|
|
|
|
*
|
|
|
|
* @vport: vport from which to retrieve the options.
|
|
|
|
* @skb: sk_buff where options should be appended.
|
|
|
|
*
|
|
|
|
* Retrieves the configuration of the given device, appending an
|
|
|
|
* %OVS_VPORT_ATTR_OPTIONS attribute that in turn contains nested
|
|
|
|
* vport-specific attributes to @skb.
|
|
|
|
*
|
|
|
|
* Returns 0 if successful, -EMSGSIZE if @skb has insufficient room, or another
|
|
|
|
* negative error code if a real error occurred. If an error occurs, @skb is
|
|
|
|
* left unmodified.
|
|
|
|
*
|
2013-04-15 14:23:03 -06:00
|
|
|
* Must be called with ovs_mutex or rcu_read_lock.
|
2011-10-25 20:26:31 -06:00
|
|
|
*/
|
|
|
|
int ovs_vport_get_options(const struct vport *vport, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
struct nlattr *nla;
|
2013-04-02 16:30:43 -06:00
|
|
|
int err;
|
|
|
|
|
|
|
|
if (!vport->ops->get_options)
|
|
|
|
return 0;
|
2011-10-25 20:26:31 -06:00
|
|
|
|
2019-04-26 03:13:06 -06:00
|
|
|
nla = nla_nest_start_noflag(skb, OVS_VPORT_ATTR_OPTIONS);
|
2011-10-25 20:26:31 -06:00
|
|
|
if (!nla)
|
|
|
|
return -EMSGSIZE;
|
|
|
|
|
2013-04-02 16:30:43 -06:00
|
|
|
err = vport->ops->get_options(vport, skb);
|
|
|
|
if (err) {
|
|
|
|
nla_nest_cancel(skb, nla);
|
|
|
|
return err;
|
2011-10-25 20:26:31 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
nla_nest_end(skb, nla);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2014-07-17 16:14:13 -06:00
|
|
|
/**
|
|
|
|
* ovs_vport_set_upcall_portids - set upcall portids of @vport.
|
|
|
|
*
|
|
|
|
* @vport: vport to modify.
|
|
|
|
* @ids: new configuration, an array of port ids.
|
|
|
|
*
|
|
|
|
* Sets the vport's upcall_portids to @ids.
|
|
|
|
*
|
|
|
|
* Returns 0 if successful, -EINVAL if @ids is zero length or cannot be parsed
|
|
|
|
* as an array of U32.
|
|
|
|
*
|
|
|
|
* Must be called with ovs_mutex.
|
|
|
|
*/
|
2014-11-06 07:58:52 -07:00
|
|
|
int ovs_vport_set_upcall_portids(struct vport *vport, const struct nlattr *ids)
|
2014-07-17 16:14:13 -06:00
|
|
|
{
|
|
|
|
struct vport_portids *old, *vport_portids;
|
|
|
|
|
|
|
|
if (!nla_len(ids) || nla_len(ids) % sizeof(u32))
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
old = ovsl_dereference(vport->upcall_portids);
|
|
|
|
|
|
|
|
vport_portids = kmalloc(sizeof(*vport_portids) + nla_len(ids),
|
|
|
|
GFP_KERNEL);
|
|
|
|
if (!vport_portids)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
vport_portids->n_ids = nla_len(ids) / sizeof(u32);
|
|
|
|
vport_portids->rn_ids = reciprocal_value(vport_portids->n_ids);
|
|
|
|
nla_memcpy(vport_portids->ids, ids, nla_len(ids));
|
|
|
|
|
|
|
|
rcu_assign_pointer(vport->upcall_portids, vport_portids);
|
|
|
|
|
|
|
|
if (old)
|
|
|
|
kfree_rcu(old, rcu);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ovs_vport_get_upcall_portids - get the upcall_portids of @vport.
|
|
|
|
*
|
|
|
|
* @vport: vport from which to retrieve the portids.
|
|
|
|
* @skb: sk_buff where portids should be appended.
|
|
|
|
*
|
|
|
|
* Retrieves the configuration of the given vport, appending the
|
|
|
|
* %OVS_VPORT_ATTR_UPCALL_PID attribute which is the array of upcall
|
|
|
|
* portids to @skb.
|
|
|
|
*
|
|
|
|
* Returns 0 if successful, -EMSGSIZE if @skb has insufficient room.
|
|
|
|
* If an error occurs, @skb is left unmodified. Must be called with
|
|
|
|
* ovs_mutex or rcu_read_lock.
|
|
|
|
*/
|
|
|
|
int ovs_vport_get_upcall_portids(const struct vport *vport,
|
|
|
|
struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
struct vport_portids *ids;
|
|
|
|
|
|
|
|
ids = rcu_dereference_ovsl(vport->upcall_portids);
|
|
|
|
|
|
|
|
if (vport->dp->user_features & OVS_DP_F_VPORT_PIDS)
|
|
|
|
return nla_put(skb, OVS_VPORT_ATTR_UPCALL_PID,
|
|
|
|
ids->n_ids * sizeof(u32), (void *)ids->ids);
|
|
|
|
else
|
|
|
|
return nla_put_u32(skb, OVS_VPORT_ATTR_UPCALL_PID, ids->ids[0]);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ovs_vport_find_upcall_portid - find the upcall portid to send upcall.
|
|
|
|
*
|
|
|
|
* @vport: vport from which the missed packet is received.
|
|
|
|
* @skb: skb that the missed packet was received.
|
|
|
|
*
|
|
|
|
* Uses the skb_get_hash() to select the upcall portid to send the
|
|
|
|
* upcall.
|
|
|
|
*
|
|
|
|
* Returns the portid of the target socket. Must be called with rcu_read_lock.
|
|
|
|
*/
|
2020-09-01 06:26:12 -06:00
|
|
|
u32 ovs_vport_find_upcall_portid(const struct vport *vport,
|
|
|
|
struct sk_buff *skb)
|
2014-07-17 16:14:13 -06:00
|
|
|
{
|
|
|
|
struct vport_portids *ids;
|
|
|
|
u32 ids_index;
|
|
|
|
u32 hash;
|
|
|
|
|
2014-10-15 13:03:41 -06:00
|
|
|
ids = rcu_dereference(vport->upcall_portids);
|
2014-07-17 16:14:13 -06:00
|
|
|
|
2019-11-06 09:34:28 -07:00
|
|
|
/* If there is only one portid, select it in the fast-path. */
|
|
|
|
if (ids->n_ids == 1)
|
|
|
|
return ids->ids[0];
|
2014-07-17 16:14:13 -06:00
|
|
|
|
|
|
|
hash = skb_get_hash(skb);
|
|
|
|
ids_index = hash - ids->n_ids * reciprocal_divide(hash, ids->rn_ids);
|
|
|
|
return ids->ids[ids_index];
|
|
|
|
}
|
|
|
|
|
2011-10-25 20:26:31 -06:00
|
|
|
/**
|
|
|
|
* ovs_vport_receive - pass up received packet to the datapath for processing
|
|
|
|
*
|
|
|
|
* @vport: vport that received the packet
|
|
|
|
* @skb: skb that was received
|
2020-07-12 17:15:09 -06:00
|
|
|
* @tun_info: tunnel (if any) that carried packet
|
2011-10-25 20:26:31 -06:00
|
|
|
*
|
|
|
|
* Must be called with rcu_read_lock. The packet cannot be shared and
|
2013-02-22 04:41:26 -07:00
|
|
|
* skb->data should point to the Ethernet header.
|
2011-10-25 20:26:31 -06:00
|
|
|
*/
|
2015-08-29 18:44:07 -06:00
|
|
|
int ovs_vport_receive(struct vport *vport, struct sk_buff *skb,
|
|
|
|
const struct ip_tunnel_info *tun_info)
|
2011-10-25 20:26:31 -06:00
|
|
|
{
|
2014-09-15 20:28:44 -06:00
|
|
|
struct sw_flow_key key;
|
|
|
|
int error;
|
2011-10-25 20:26:31 -06:00
|
|
|
|
2014-09-15 20:20:31 -06:00
|
|
|
OVS_CB(skb)->input_vport = vport;
|
2015-08-26 12:31:48 -06:00
|
|
|
OVS_CB(skb)->mru = 0;
|
2016-06-10 12:49:33 -06:00
|
|
|
OVS_CB(skb)->cutlen = 0;
|
2015-10-16 12:08:18 -06:00
|
|
|
if (unlikely(dev_net(skb->dev) != ovs_dp_get_net(vport->dp))) {
|
|
|
|
u32 mark;
|
|
|
|
|
|
|
|
mark = skb->mark;
|
|
|
|
skb_scrub_packet(skb, true);
|
|
|
|
skb->mark = mark;
|
|
|
|
tun_info = NULL;
|
|
|
|
}
|
|
|
|
|
2014-09-15 20:28:44 -06:00
|
|
|
/* Extract flow from 'skb' into 'key'. */
|
2014-10-03 16:35:31 -06:00
|
|
|
error = ovs_flow_key_extract(tun_info, skb, &key);
|
2014-09-15 20:28:44 -06:00
|
|
|
if (unlikely(error)) {
|
|
|
|
kfree_skb(skb);
|
2015-08-29 18:44:07 -06:00
|
|
|
return error;
|
2014-09-15 20:28:44 -06:00
|
|
|
}
|
|
|
|
ovs_dp_process_packet(skb, &key);
|
2015-08-29 18:44:07 -06:00
|
|
|
return 0;
|
2011-10-25 20:26:31 -06:00
|
|
|
}
|
|
|
|
|
2018-03-07 16:38:48 -07:00
|
|
|
static int packet_length(const struct sk_buff *skb,
|
|
|
|
struct net_device *dev)
|
2015-10-21 00:00:10 -06:00
|
|
|
{
|
2018-03-07 16:38:48 -07:00
|
|
|
int length = skb->len - dev->hard_header_len;
|
2015-10-21 00:00:10 -06:00
|
|
|
|
2016-10-10 09:02:43 -06:00
|
|
|
if (!skb_vlan_tag_present(skb) &&
|
|
|
|
eth_type_vlan(skb->protocol))
|
2015-10-21 00:00:10 -06:00
|
|
|
length -= VLAN_HLEN;
|
|
|
|
|
2016-09-07 10:56:59 -06:00
|
|
|
/* Don't subtract for multiple VLAN tags. Most (all?) drivers allow
|
|
|
|
* (ETH_LEN + VLAN_HLEN) in addition to the mtu value, but almost none
|
|
|
|
* account for 802.1ad. e.g. is_skb_forwardable().
|
|
|
|
*/
|
|
|
|
|
2018-03-07 16:38:48 -07:00
|
|
|
return length > 0 ? length : 0;
|
2015-10-21 00:00:10 -06:00
|
|
|
}
|
|
|
|
|
2016-11-10 08:28:19 -07:00
|
|
|
void ovs_vport_send(struct vport *vport, struct sk_buff *skb, u8 mac_proto)
|
2015-10-21 00:00:10 -06:00
|
|
|
{
|
|
|
|
int mtu = vport->dev->mtu;
|
|
|
|
|
2016-11-10 08:28:21 -07:00
|
|
|
switch (vport->dev->type) {
|
|
|
|
case ARPHRD_NONE:
|
|
|
|
if (mac_proto == MAC_PROTO_ETHERNET) {
|
|
|
|
skb_reset_network_header(skb);
|
|
|
|
skb_reset_mac_len(skb);
|
|
|
|
skb->protocol = htons(ETH_P_TEB);
|
|
|
|
} else if (mac_proto != MAC_PROTO_NONE) {
|
|
|
|
WARN_ON_ONCE(1);
|
|
|
|
goto drop;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case ARPHRD_ETHER:
|
|
|
|
if (mac_proto != MAC_PROTO_ETHERNET)
|
|
|
|
goto drop;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
goto drop;
|
|
|
|
}
|
|
|
|
|
2016-11-10 08:28:17 -07:00
|
|
|
if (unlikely(packet_length(skb, vport->dev) > mtu &&
|
|
|
|
!skb_is_gso(skb))) {
|
2015-10-21 00:00:10 -06:00
|
|
|
net_warn_ratelimited("%s: dropped over-mtu packet: %d > %d\n",
|
|
|
|
vport->dev->name,
|
2016-11-10 08:28:17 -07:00
|
|
|
packet_length(skb, vport->dev), mtu);
|
2015-10-21 00:00:10 -06:00
|
|
|
vport->dev->stats.tx_errors++;
|
|
|
|
goto drop;
|
|
|
|
}
|
|
|
|
|
|
|
|
skb->dev = vport->dev;
|
|
|
|
vport->ops->send(skb);
|
|
|
|
return;
|
|
|
|
|
|
|
|
drop:
|
|
|
|
kfree_skb(skb);
|
|
|
|
}
|