f607a15800
When removing last vlan from a device, garp_uninit_applicant() calls synchronize_rcu() to make sure no user can still manipulate struct garp_applicant before we free it. Use call_rcu() instead, as a step to further net_device dismantle optimizations. Add the temporary garp_cleanup_module() function to make sure no pending call_rcu() are left at module unload time [ this will be removed when kfree_rcu() is available ] Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
131 lines
2.6 KiB
C
131 lines
2.6 KiB
C
#ifndef _NET_GARP_H
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#define _NET_GARP_H
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#include <net/stp.h>
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#define GARP_PROTOCOL_ID 0x1
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#define GARP_END_MARK 0x0
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struct garp_pdu_hdr {
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__be16 protocol;
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};
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struct garp_msg_hdr {
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u8 attrtype;
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};
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enum garp_attr_event {
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GARP_LEAVE_ALL,
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GARP_JOIN_EMPTY,
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GARP_JOIN_IN,
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GARP_LEAVE_EMPTY,
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GARP_LEAVE_IN,
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GARP_EMPTY,
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};
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struct garp_attr_hdr {
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u8 len;
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u8 event;
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u8 data[];
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};
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struct garp_skb_cb {
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u8 cur_type;
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};
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static inline struct garp_skb_cb *garp_cb(struct sk_buff *skb)
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{
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BUILD_BUG_ON(sizeof(struct garp_skb_cb) >
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FIELD_SIZEOF(struct sk_buff, cb));
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return (struct garp_skb_cb *)skb->cb;
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}
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enum garp_applicant_state {
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GARP_APPLICANT_INVALID,
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GARP_APPLICANT_VA,
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GARP_APPLICANT_AA,
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GARP_APPLICANT_QA,
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GARP_APPLICANT_LA,
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GARP_APPLICANT_VP,
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GARP_APPLICANT_AP,
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GARP_APPLICANT_QP,
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GARP_APPLICANT_VO,
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GARP_APPLICANT_AO,
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GARP_APPLICANT_QO,
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__GARP_APPLICANT_MAX
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};
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#define GARP_APPLICANT_MAX (__GARP_APPLICANT_MAX - 1)
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enum garp_event {
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GARP_EVENT_REQ_JOIN,
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GARP_EVENT_REQ_LEAVE,
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GARP_EVENT_R_JOIN_IN,
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GARP_EVENT_R_JOIN_EMPTY,
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GARP_EVENT_R_EMPTY,
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GARP_EVENT_R_LEAVE_IN,
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GARP_EVENT_R_LEAVE_EMPTY,
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GARP_EVENT_TRANSMIT_PDU,
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__GARP_EVENT_MAX
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};
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#define GARP_EVENT_MAX (__GARP_EVENT_MAX - 1)
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enum garp_action {
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GARP_ACTION_NONE,
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GARP_ACTION_S_JOIN_IN,
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GARP_ACTION_S_LEAVE_EMPTY,
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};
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struct garp_attr {
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struct rb_node node;
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enum garp_applicant_state state;
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u8 type;
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u8 dlen;
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unsigned char data[];
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};
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enum garp_applications {
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GARP_APPLICATION_GVRP,
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__GARP_APPLICATION_MAX
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};
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#define GARP_APPLICATION_MAX (__GARP_APPLICATION_MAX - 1)
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struct garp_application {
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enum garp_applications type;
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unsigned int maxattr;
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struct stp_proto proto;
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};
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struct garp_applicant {
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struct garp_application *app;
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struct net_device *dev;
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struct timer_list join_timer;
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spinlock_t lock;
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struct sk_buff_head queue;
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struct sk_buff *pdu;
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struct rb_root gid;
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struct rcu_head rcu;
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};
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struct garp_port {
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struct garp_applicant __rcu *applicants[GARP_APPLICATION_MAX + 1];
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struct rcu_head rcu;
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};
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extern int garp_register_application(struct garp_application *app);
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extern void garp_unregister_application(struct garp_application *app);
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extern int garp_init_applicant(struct net_device *dev,
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struct garp_application *app);
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extern void garp_uninit_applicant(struct net_device *dev,
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struct garp_application *app);
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extern int garp_request_join(const struct net_device *dev,
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const struct garp_application *app,
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const void *data, u8 len, u8 type);
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extern void garp_request_leave(const struct net_device *dev,
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const struct garp_application *app,
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const void *data, u8 len, u8 type);
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#endif /* _NET_GARP_H */
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