Commit 99f3a064 authored by Martin KaFai Lau's avatar Martin KaFai Lau Committed by Daniel Borkmann
Browse files

bpf: net: Add SO_DETACH_REUSEPORT_BPF 



There is SO_ATTACH_REUSEPORT_[CE]BPF but there is no DETACH.
This patch adds SO_DETACH_REUSEPORT_BPF sockopt.  The same
sockopt can be used to undo both SO_ATTACH_REUSEPORT_[CE]BPF.

reseport_detach_prog() is added and it is mostly a mirror
of the existing reuseport_attach_prog().  The differences are,
it does not call reuseport_alloc() and returns -ENOENT when
there is no old prog.

Cc: Craig Gallek <kraig@google.com>
Signed-off-by: default avatarMartin KaFai Lau <kafai@fb.com>
Reviewed-by: default avatarStanislav Fomichev <sdf@google.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
parent e55d54f4

arch/alpha/include/uapi/asm/socket.h

+2 −0
Original line number Diff line number Diff line
@@ -122,6 +122,8 @@ 
#define SO_RCVTIMEO_NEW         66

#define SO_SNDTIMEO_NEW         67



#define SO_DETACH_REUSEPORT_BPF 68



#if !defined(__KERNEL__)



#if __BITS_PER_LONG == 64

arch/mips/include/uapi/asm/socket.h

+2 −0
Original line number Diff line number Diff line
@@ -133,6 +133,8 @@ 
#define SO_RCVTIMEO_NEW         66

#define SO_SNDTIMEO_NEW         67



#define SO_DETACH_REUSEPORT_BPF 68



#if !defined(__KERNEL__)



#if __BITS_PER_LONG == 64

arch/parisc/include/uapi/asm/socket.h

+2 −0
Original line number Diff line number Diff line
@@ -114,6 +114,8 @@ 
#define SO_RCVTIMEO_NEW         0x4040

#define SO_SNDTIMEO_NEW         0x4041



#define SO_DETACH_REUSEPORT_BPF 0x4042



#if !defined(__KERNEL__)



#if __BITS_PER_LONG == 64

arch/sparc/include/uapi/asm/socket.h

+2 −0
Original line number Diff line number Diff line
@@ -115,6 +115,8 @@ 
#define SO_RCVTIMEO_NEW          0x0044

#define SO_SNDTIMEO_NEW          0x0045



#define SO_DETACH_REUSEPORT_BPF  0x0047



#if !defined(__KERNEL__)

include/net/sock_reuseport.h

+2 −0
Original line number Diff line number Diff line
@@ -35,6 +35,8 @@ extern struct sock *reuseport_select_sock(struct sock *sk, 
					  struct sk_buff *skb,

					  int hdr_len);

extern int reuseport_attach_prog(struct sock *sk, struct bpf_prog *prog);

extern int reuseport_detach_prog(struct sock *sk);



int reuseport_get_id(struct sock_reuseport *reuse);



#endif  /* _SOCK_REUSEPORT_H */

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