[PATCH net-next V3 1/2] tuntap: rename struct tun_steering_prog to struct tun_prog

[Jason Wang]

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

Signed-off-by: Jason Wang <jasow...@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 2fba3be..76197ed 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -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,
-                                  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);
@@ -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:
-- 
2.7.4