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Commit cd5681d7 authored by Jason Wang's avatar Jason Wang Committed by David S. Miller
Browse files

tuntap: rename struct tun_steering_prog to struct tun_prog 



To be reused by other eBPF program other than queue selection.

Signed-off-by: default avatarJason Wang <jasowang@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ca46abd6

drivers/net/tun.c

+16 −16
Original line number Diff line number Diff line
@@ -196,7 +196,7 @@ struct tun_flow_entry { 


#define TUN_NUM_FLOW_ENTRIES 1024



struct tun_steering_prog {

struct tun_prog {

	struct rcu_head rcu;

	struct bpf_prog *prog;

};
@@ -238,7 +238,7 @@ struct tun_struct { 
	u32 rx_batched;

	struct tun_pcpu_stats __percpu *pcpu_stats;

	struct bpf_prog __rcu *xdp_prog;

	struct tun_steering_prog __rcu *steering_prog;

	struct tun_prog __rcu *steering_prog;

};



bool tun_is_xdp_buff(void *ptr)
@@ -590,7 +590,7 @@ static u16 tun_automq_select_queue(struct tun_struct *tun, struct sk_buff *skb) 


static u16 tun_ebpf_select_queue(struct tun_struct *tun, struct sk_buff *skb)

{

	struct tun_steering_prog *prog;

	struct tun_prog *prog;

	u16 ret = 0;



	prog = rcu_dereference(tun->steering_prog);
@@ -2184,19 +2184,18 @@ static ssize_t tun_chr_read_iter(struct kiocb *iocb, struct iov_iter *to) 
	return ret;

}



static void tun_steering_prog_free(struct rcu_head *rcu)

static void tun_prog_free(struct rcu_head *rcu)

{

	struct tun_steering_prog *prog = container_of(rcu,

					 struct tun_steering_prog, rcu);

	struct tun_prog *prog = container_of(rcu, struct tun_prog, rcu);



	bpf_prog_destroy(prog->prog);

	kfree(prog);

}



static int __tun_set_steering_ebpf(struct tun_struct *tun,

static int __tun_set_ebpf(struct tun_struct *tun, struct tun_prog **prog_p,

			  struct bpf_prog *prog)

{

	struct tun_steering_prog *old, *new = NULL;

	struct tun_prog *old, *new = NULL;



	if (prog) {

		new = kmalloc(sizeof(*new), GFP_KERNEL);
@@ -2206,13 +2205,13 @@ static int __tun_set_steering_ebpf(struct tun_struct *tun, 
	}



	spin_lock_bh(&tun->lock);

	old = rcu_dereference_protected(tun->steering_prog,

	old = rcu_dereference_protected(*prog_p,

					lockdep_is_held(&tun->lock));

	rcu_assign_pointer(tun->steering_prog, new);

	rcu_assign_pointer(*prog_p, new);

	spin_unlock_bh(&tun->lock);



	if (old)

		call_rcu(&old->rcu, tun_steering_prog_free);

		call_rcu(&old->rcu, tun_prog_free);



	return 0;

}
@@ -2225,7 +2224,7 @@ static void tun_free_netdev(struct net_device *dev) 
	free_percpu(tun->pcpu_stats);

	tun_flow_uninit(tun);

	security_tun_dev_free_security(tun->security);

	__tun_set_steering_ebpf(tun, NULL);

	__tun_set_ebpf(tun, &tun->steering_prog, NULL);

}



static void tun_setup(struct net_device *dev)
@@ -2720,7 +2719,8 @@ static int tun_set_queue(struct file *file, struct ifreq *ifr) 
	return ret;

}



static int tun_set_steering_ebpf(struct tun_struct *tun, void __user *data)

static int tun_set_ebpf(struct tun_struct *tun, struct tun_prog **prog_p,

			void __user *data)

{

	struct bpf_prog *prog;

	int fd;
@@ -2736,7 +2736,7 @@ static int tun_set_steering_ebpf(struct tun_struct *tun, void __user *data) 
			return PTR_ERR(prog);

	}



	return __tun_set_steering_ebpf(tun, prog);

	return __tun_set_ebpf(tun, prog_p, prog);

}



static long __tun_chr_ioctl(struct file *file, unsigned int cmd,
@@ -3016,7 +3016,7 @@ static long __tun_chr_ioctl(struct file *file, unsigned int cmd, 
		break;



	case TUNSETSTEERINGEBPF:

		ret = tun_set_steering_ebpf(tun, argp);

		ret = tun_set_ebpf(tun, &tun->steering_prog, argp);

		break;



	default: