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Subject[PATCH net-next V2 1/2] tuntap: rename struct tun_steering_prog to struct tun_prog
Date
To be reused by other eBPF program other than queue selection.

Signed-off-by: Jason Wang <jasowang@redhat.com>
---
drivers/net/tun.c | 32 ++++++++++++++++----------------
1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index e367d631..0853829 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -195,7 +195,7 @@ 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;
};
@@ -237,7 +237,7 @@ 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;
};

static int tun_napi_receive(struct napi_struct *napi, int budget)
@@ -571,7 +571,7 @@ 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);
@@ -2027,19 +2027,18 @@ 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,
- struct bpf_prog *prog)
+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);
@@ -2049,13 +2048,13 @@ 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;
}
@@ -2068,7 +2067,7 @@ 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)
@@ -2550,7 +2549,8 @@ 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;
@@ -2566,7 +2566,7 @@ 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,
@@ -2846,7 +2846,7 @@ 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:
--
2.7.4
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