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linux/net/core/dev.h

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net: extract a few internals from netdevice.h There's a number of functions and static variables used under net/core/ but not from the outside. We currently dump most of them into netdevice.h. That bad for many reasons: - netdevice.h is very cluttered, hard to figure out what the APIs are; - netdevice.h is very long; - we have to touch netdevice.h more which causes expensive incremental builds. Create a header under net/core/ and move some declarations. The new header is also a bit of a catch-all but that's fine, if we create more specific headers people will likely over-think where their declaration fit best. And end up putting them in netdevice.h, again. More work should be done on splitting netdevice.h into more targeted headers, but that'd be more time consuming so small steps. Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-04-07 00:37:54 +03:00
/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _NET_CORE_DEV_H
#define _NET_CORE_DEV_H
#include <linux/types.h>
struct net;
struct net_device;
struct netdev_bpf;
struct netdev_phys_item_id;
struct netlink_ext_ack;
net-sysctl: factor-out rpm mask manipulation helpers Will simplify the following patch. No functional change intended. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Simon Horman <simon.horman@corigine.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-02-07 21:44:56 +03:00
struct cpumask;
net: extract a few internals from netdevice.h There's a number of functions and static variables used under net/core/ but not from the outside. We currently dump most of them into netdevice.h. That bad for many reasons: - netdevice.h is very cluttered, hard to figure out what the APIs are; - netdevice.h is very long; - we have to touch netdevice.h more which causes expensive incremental builds. Create a header under net/core/ and move some declarations. The new header is also a bit of a catch-all but that's fine, if we create more specific headers people will likely over-think where their declaration fit best. And end up putting them in netdevice.h, again. More work should be done on splitting netdevice.h into more targeted headers, but that'd be more time consuming so small steps. Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-04-07 00:37:54 +03:00
/* Random bits of netdevice that don't need to be exposed */
#define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
struct sd_flow_limit {
u64 count;
unsigned int num_buckets;
unsigned int history_head;
u16 history[FLOW_LIMIT_HISTORY];
u8 buckets[];
};
extern int netdev_flow_limit_table_len;
#ifdef CONFIG_PROC_FS
int __init dev_proc_init(void);
#else
#define dev_proc_init() 0
#endif
void linkwatch_init_dev(struct net_device *dev);
void linkwatch_run_queue(void);
void dev_addr_flush(struct net_device *dev);
int dev_addr_init(struct net_device *dev);
void dev_addr_check(struct net_device *dev);
/* sysctls not referred to from outside net/core/ */
extern int netdev_budget;
extern unsigned int netdev_budget_usecs;
net: add skb_defer_max sysctl commit 68822bdf76f1 ("net: generalize skb freeing deferral to per-cpu lists") added another per-cpu cache of skbs. It was expected to be small, and an IPI was forced whenever the list reached 128 skbs. We might need to be able to control more precisely queue capacity and added latency. An IPI is generated whenever queue reaches half capacity. Default value of the new limit is 64. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-05-16 07:24:55 +03:00
extern unsigned int sysctl_skb_defer_max;
net: extract a few internals from netdevice.h There's a number of functions and static variables used under net/core/ but not from the outside. We currently dump most of them into netdevice.h. That bad for many reasons: - netdevice.h is very cluttered, hard to figure out what the APIs are; - netdevice.h is very long; - we have to touch netdevice.h more which causes expensive incremental builds. Create a header under net/core/ and move some declarations. The new header is also a bit of a catch-all but that's fine, if we create more specific headers people will likely over-think where their declaration fit best. And end up putting them in netdevice.h, again. More work should be done on splitting netdevice.h into more targeted headers, but that'd be more time consuming so small steps. Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-04-07 00:37:54 +03:00
extern int netdev_tstamp_prequeue;
extern int netdev_unregister_timeout_secs;
extern int weight_p;
extern int dev_weight_rx_bias;
extern int dev_weight_tx_bias;
/* rtnl helpers */
extern struct list_head net_todo_list;
void netdev_run_todo(void);
/* netdev management, shared between various uAPI entry points */
struct netdev_name_node {
struct hlist_node hlist;
struct list_head list;
struct net_device *dev;
const char *name;
};
int netdev_get_name(struct net *net, char *name, int ifindex);
int dev_change_name(struct net_device *dev, const char *newname);
net: check for altname conflicts when changing netdev's netns It's currently possible to create an altname conflicting with an altname or real name of another device by creating it in another netns and moving it over: [ ~]$ ip link add dev eth0 type dummy [ ~]$ ip netns add test [ ~]$ ip -netns test link add dev ethX netns test type dummy [ ~]$ ip -netns test link property add dev ethX altname eth0 [ ~]$ ip -netns test link set dev ethX netns 1 [ ~]$ ip link ... 3: eth0: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/ether 02:40:88:62:ec:b8 brd ff:ff:ff:ff:ff:ff ... 5: ethX: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/ether 26:b7:28:78:38:0f brd ff:ff:ff:ff:ff:ff altname eth0 Create a macro for walking the altnames, this hopefully makes it clearer that the list we walk contains only altnames. Which is otherwise not entirely intuitive. Fixes: 36fbf1e52bd3 ("net: rtnetlink: add linkprop commands to add and delete alternative ifnames") Reviewed-by: Jiri Pirko <jiri@nvidia.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2023-10-18 04:38:14 +03:00
#define netdev_for_each_altname(dev, namenode) \
list_for_each_entry((namenode), &(dev)->name_node->list, list)
net: extract a few internals from netdevice.h There's a number of functions and static variables used under net/core/ but not from the outside. We currently dump most of them into netdevice.h. That bad for many reasons: - netdevice.h is very cluttered, hard to figure out what the APIs are; - netdevice.h is very long; - we have to touch netdevice.h more which causes expensive incremental builds. Create a header under net/core/ and move some declarations. The new header is also a bit of a catch-all but that's fine, if we create more specific headers people will likely over-think where their declaration fit best. And end up putting them in netdevice.h, again. More work should be done on splitting netdevice.h into more targeted headers, but that'd be more time consuming so small steps. Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-04-07 00:37:54 +03:00
int netdev_name_node_alt_create(struct net_device *dev, const char *name);
int netdev_name_node_alt_destroy(struct net_device *dev, const char *name);
int dev_validate_mtu(struct net_device *dev, int mtu,
struct netlink_ext_ack *extack);
int dev_set_mtu_ext(struct net_device *dev, int mtu,
struct netlink_ext_ack *extack);
int dev_get_phys_port_id(struct net_device *dev,
struct netdev_phys_item_id *ppid);
int dev_get_phys_port_name(struct net_device *dev,
char *name, size_t len);
int dev_change_proto_down(struct net_device *dev, bool proto_down);
void dev_change_proto_down_reason(struct net_device *dev, unsigned long mask,
u32 value);
typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
int fd, int expected_fd, u32 flags);
int dev_change_tx_queue_len(struct net_device *dev, unsigned long new_len);
void dev_set_group(struct net_device *dev, int new_group);
int dev_change_carrier(struct net_device *dev, bool new_carrier);
void __dev_set_rx_mode(struct net_device *dev);
rtnetlink: pass netlink message header and portid to rtnl_configure_link() This patch pass netlink message header and portid to rtnl_configure_link() All the functions in this call chain need to add the parameters so we can use them in the last call rtnl_notify(), and notify the userspace about the new link info if NLM_F_ECHO flag is set. - rtnl_configure_link() - __dev_notify_flags() - rtmsg_ifinfo() - rtmsg_ifinfo_event() - rtmsg_ifinfo_build_skb() - rtmsg_ifinfo_send() - rtnl_notify() Also move __dev_notify_flags() declaration to net/core/dev.h, as Jakub suggested. Signed-off-by: Hangbin Liu <liuhangbin@gmail.com> Reviewed-by: Guillaume Nault <gnault@redhat.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-10-28 11:42:21 +03:00
void __dev_notify_flags(struct net_device *dev, unsigned int old_flags,
unsigned int gchanges, u32 portid,
const struct nlmsghdr *nlh);
net: add new helper unregister_netdevice_many_notify Add new helper unregister_netdevice_many_notify(), pass netlink message header and portid, which could be used to notify userspace when flag NLM_F_ECHO is set. Make the unregister_netdevice_many() as a wrapper of new function unregister_netdevice_many_notify(). Suggested-by: Guillaume Nault <gnault@redhat.com> Signed-off-by: Hangbin Liu <liuhangbin@gmail.com> Reviewed-by: Guillaume Nault <gnault@redhat.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-10-28 11:42:22 +03:00
void unregister_netdevice_many_notify(struct list_head *head,
u32 portid, const struct nlmsghdr *nlh);
net: move netif_set_gso_max helpers These are now internal to the core, no need to expose them. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-05-06 05:51:34 +03:00
static inline void netif_set_gso_max_size(struct net_device *dev,
unsigned int size)
{
/* dev->gso_max_size is read locklessly from sk_setup_caps() */
WRITE_ONCE(dev->gso_max_size, size);
net: add gso_ipv4_max_size and gro_ipv4_max_size per device This patch introduces gso_ipv4_max_size and gro_ipv4_max_size per device and adds netlink attributes for them, so that IPV4 BIG TCP can be guarded by a separate tunable in the next patch. To not break the old application using "gso/gro_max_size" for IPv4 GSO packets, this patch updates "gso/gro_ipv4_max_size" in netif_set_gso/gro_max_size() if the new size isn't greater than GSO_LEGACY_MAX_SIZE, so that nothing will change even if userspace doesn't realize the new netlink attributes. Signed-off-by: Xin Long <lucien.xin@gmail.com> Reviewed-by: David Ahern <dsahern@kernel.org> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-01-28 18:58:38 +03:00
if (size <= GSO_LEGACY_MAX_SIZE)
WRITE_ONCE(dev->gso_ipv4_max_size, size);
net: move netif_set_gso_max helpers These are now internal to the core, no need to expose them. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-05-06 05:51:34 +03:00
}
static inline void netif_set_gso_max_segs(struct net_device *dev,
unsigned int segs)
{
/* dev->gso_max_segs is read locklessly from sk_setup_caps() */
WRITE_ONCE(dev->gso_max_segs, segs);
}
static inline void netif_set_gro_max_size(struct net_device *dev,
unsigned int size)
{
/* This pairs with the READ_ONCE() in skb_gro_receive() */
WRITE_ONCE(dev->gro_max_size, size);
net: add gso_ipv4_max_size and gro_ipv4_max_size per device This patch introduces gso_ipv4_max_size and gro_ipv4_max_size per device and adds netlink attributes for them, so that IPV4 BIG TCP can be guarded by a separate tunable in the next patch. To not break the old application using "gso/gro_max_size" for IPv4 GSO packets, this patch updates "gso/gro_ipv4_max_size" in netif_set_gso/gro_max_size() if the new size isn't greater than GSO_LEGACY_MAX_SIZE, so that nothing will change even if userspace doesn't realize the new netlink attributes. Signed-off-by: Xin Long <lucien.xin@gmail.com> Reviewed-by: David Ahern <dsahern@kernel.org> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-01-28 18:58:38 +03:00
if (size <= GRO_LEGACY_MAX_SIZE)
WRITE_ONCE(dev->gro_ipv4_max_size, size);
}
static inline void netif_set_gso_ipv4_max_size(struct net_device *dev,
unsigned int size)
{
/* dev->gso_ipv4_max_size is read locklessly from sk_setup_caps() */
WRITE_ONCE(dev->gso_ipv4_max_size, size);
}
static inline void netif_set_gro_ipv4_max_size(struct net_device *dev,
unsigned int size)
{
/* This pairs with the READ_ONCE() in skb_gro_receive() */
WRITE_ONCE(dev->gro_ipv4_max_size, size);
net: move netif_set_gso_max helpers These are now internal to the core, no need to expose them. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-05-06 05:51:34 +03:00
}
net-sysctl: factor-out rpm mask manipulation helpers Will simplify the following patch. No functional change intended. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Simon Horman <simon.horman@corigine.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-02-07 21:44:56 +03:00
int rps_cpumask_housekeeping(struct cpumask *mask);
net, bpf: Add a warning if NAPI cb missed xdp_do_flush(). A few drivers were missing a xdp_do_flush() invocation after XDP_REDIRECT. Add three helper functions each for one of the per-CPU lists. Return true if the per-CPU list is non-empty and flush the list. Add xdp_do_check_flushed() which invokes each helper functions and creates a warning if one of the functions had a non-empty list. Hide everything behind CONFIG_DEBUG_NET. Suggested-by: Jesper Dangaard Brouer <hawk@kernel.org> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Toke Høiland-Jørgensen <toke@redhat.com> Acked-by: Jakub Kicinski <kuba@kernel.org> Acked-by: John Fastabend <john.fastabend@gmail.com> Link: https://lore.kernel.org/bpf/20231016125738.Yt79p1uF@linutronix.de
2023-10-16 15:57:38 +03:00
#if defined(CONFIG_DEBUG_NET) && defined(CONFIG_BPF_SYSCALL)
void xdp_do_check_flushed(struct napi_struct *napi);
#else
static inline void xdp_do_check_flushed(struct napi_struct *napi) { }
#endif
netdev-genl: Add netlink framework functions for napi Implement the netdev netlink framework functions for napi support. The netdev structure tracks all the napi instances and napi fields. The napi instances and associated parameters can be retrieved this way. Signed-off-by: Amritha Nambiar <amritha.nambiar@intel.com> Reviewed-by: Sridhar Samudrala <sridhar.samudrala@intel.com> Link: https://lore.kernel.org/r/170147333637.5260.14807433239805550815.stgit@anambiarhost.jf.intel.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-12-02 02:28:56 +03:00
struct napi_struct *napi_by_id(unsigned int napi_id);
net: extract a few internals from netdevice.h There's a number of functions and static variables used under net/core/ but not from the outside. We currently dump most of them into netdevice.h. That bad for many reasons: - netdevice.h is very cluttered, hard to figure out what the APIs are; - netdevice.h is very long; - we have to touch netdevice.h more which causes expensive incremental builds. Create a header under net/core/ and move some declarations. The new header is also a bit of a catch-all but that's fine, if we create more specific headers people will likely over-think where their declaration fit best. And end up putting them in netdevice.h, again. More work should be done on splitting netdevice.h into more targeted headers, but that'd be more time consuming so small steps. Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-04-07 00:37:54 +03:00
#endif
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