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| author | Christoph Hellwig <hch@lst.de> | 2020-05-28 07:12:13 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-05-28 11:11:44 -0700 |
| commit | 7594888c782e735f8a7b110094307a4dbe7b3f03 (patch) | |
| tree | 70ec43dbef51bfe6b0b7799abbc866dcb11cbcca /net/core/sock.c | |
| parent | 76ee0785f42afbc0418072b7179d95f450d3c9a8 (diff) | |
| download | linux-stable-7594888c782e735f8a7b110094307a4dbe7b3f03.tar.gz linux-stable-7594888c782e735f8a7b110094307a4dbe7b3f03.tar.bz2 linux-stable-7594888c782e735f8a7b110094307a4dbe7b3f03.zip | |
net: add sock_bindtoindex
Add a helper to directly set the SO_BINDTOIFINDEX sockopt from kernel
space without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/sock.c')
| -rw-r--r-- | net/core/sock.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/net/core/sock.c b/net/core/sock.c index d3b1d61e4f76..23f80880fbb2 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -566,7 +566,7 @@ struct dst_entry *sk_dst_check(struct sock *sk, u32 cookie) } EXPORT_SYMBOL(sk_dst_check); -static int sock_setbindtodevice_locked(struct sock *sk, int ifindex) +static int sock_bindtoindex_locked(struct sock *sk, int ifindex) { int ret = -ENOPROTOOPT; #ifdef CONFIG_NETDEVICES @@ -594,6 +594,18 @@ out: return ret; } +int sock_bindtoindex(struct sock *sk, int ifindex) +{ + int ret; + + lock_sock(sk); + ret = sock_bindtoindex_locked(sk, ifindex); + release_sock(sk); + + return ret; +} +EXPORT_SYMBOL(sock_bindtoindex); + static int sock_setbindtodevice(struct sock *sk, char __user *optval, int optlen) { @@ -634,10 +646,7 @@ static int sock_setbindtodevice(struct sock *sk, char __user *optval, goto out; } - lock_sock(sk); - ret = sock_setbindtodevice_locked(sk, index); - release_sock(sk); - + return sock_bindtoindex(sk, index); out: #endif @@ -1216,7 +1225,7 @@ set_rcvbuf: break; case SO_BINDTOIFINDEX: - ret = sock_setbindtodevice_locked(sk, val); + ret = sock_bindtoindex_locked(sk, val); break; default: |