From 432490f9d455fb842d70219f22d9d2c812371676 Mon Sep 17 00:00:00 2001 From: Cyrill Gorcunov Date: Fri, 21 Oct 2016 13:03:44 +0300 Subject: net: ip, diag -- Add diag interface for raw sockets In criu we are actively using diag interface to collect sockets present in the system when dumping applications. And while for unix, tcp, udp[lite], packet, netlink it works as expected, the raw sockets do not have. Thus add it. v2: - add missing sock_put calls in raw_diag_dump_one (by eric.dumazet@) - implement @destroy for diag requests (by dsa@) v3: - add export of raw_abort for IPv6 (by dsa@) - pass net-admin flag into inet_sk_diag_fill due to changes in net-next branch (by dsa@) v4: - use @pad in struct inet_diag_req_v2 for raw socket protocol specification: raw module carries sockets which may have custom protocol passed from socket() syscall and sole @sdiag_protocol is not enough to match underlied ones - start reporting protocol specifed in socket() call when sockets are raw ones for the same reason: user space tools like ss may parse this attribute and use it for socket matching v5 (by eric.dumazet@): - use sock_hold in raw_sock_get instead of atomic_inc, we're holding (raw_v4_hashinfo|raw_v6_hashinfo)->lock when looking up so counter won't be zero here. v6: - use sdiag_raw_protocol() helper which will access @pad structure used for raw sockets protocol specification: we can't simply rename this member without breaking uapi v7: - sine sdiag_raw_protocol() helper is not suitable for uapi lets rather make an alias structure with proper names. __check_inet_diag_req_raw helper will catch if any of structure unintentionally changed. CC: David S. Miller CC: Eric Dumazet CC: David Ahern CC: Alexey Kuznetsov CC: James Morris CC: Hideaki YOSHIFUJI CC: Patrick McHardy CC: Andrey Vagin CC: Stephen Hemminger Signed-off-by: Cyrill Gorcunov Signed-off-by: David S. Miller --- include/uapi/linux/inet_diag.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'include/uapi') diff --git a/include/uapi/linux/inet_diag.h b/include/uapi/linux/inet_diag.h index 509cd961068d..bbe201047df6 100644 --- a/include/uapi/linux/inet_diag.h +++ b/include/uapi/linux/inet_diag.h @@ -43,6 +43,23 @@ struct inet_diag_req_v2 { struct inet_diag_sockid id; }; +/* + * SOCK_RAW sockets require the underlied protocol to be + * additionally specified so we can use @pad member for + * this, but we can't rename it because userspace programs + * still may depend on this name. Instead lets use another + * structure definition as an alias for struct + * @inet_diag_req_v2. + */ +struct inet_diag_req_raw { + __u8 sdiag_family; + __u8 sdiag_protocol; + __u8 idiag_ext; + __u8 sdiag_raw_protocol; + __u32 idiag_states; + struct inet_diag_sockid id; +}; + enum { INET_DIAG_REQ_NONE, INET_DIAG_REQ_BYTECODE, -- cgit v1.2.3-59-g8ed1b