diff options
| author | Pavel Emelyanov <xemul@parallels.com> | 2011-12-15 02:45:58 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-12-16 13:48:28 -0500 |
| commit | ac02be8d96af9f66a4de86781ee9facc2dff99d4 (patch) | |
| tree | f9a7ef71f50d5bda679f8603cbfa53c0d4092df4 | |
| parent | 5f7b0569460b7d8d01ca776430a00505a68b7584 (diff) | |
| download | linux-ac02be8d96af9f66a4de86781ee9facc2dff99d4.tar.bz2 | |
unix_diag: Unix peer inode NLA
Report the peer socket inode ID as NLA. With this it's finally
possible to find out the other end of an interesting unix connection.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/linux/unix_diag.h | 2 | ||||
| -rw-r--r-- | net/unix/diag.c | 24 |
2 files changed, 26 insertions, 0 deletions
diff --git a/include/linux/unix_diag.h b/include/linux/unix_diag.h index 3e53adbe9c7f..2d74a86024ac 100644 --- a/include/linux/unix_diag.h +++ b/include/linux/unix_diag.h @@ -13,6 +13,7 @@ struct unix_diag_req { #define UDIAG_SHOW_NAME 0x00000001 /* show name (not path) */ #define UDIAG_SHOW_VFS 0x00000002 /* show VFS inode info */ +#define UDIAG_SHOW_PEER 0x00000004 /* show peer socket info */ struct unix_diag_msg { __u8 udiag_family; @@ -27,6 +28,7 @@ struct unix_diag_msg { enum { UNIX_DIAG_NAME, UNIX_DIAG_VFS, + UNIX_DIAG_PEER, UNIX_DIAG_MAX, }; diff --git a/net/unix/diag.c b/net/unix/diag.c index 83799ef19b49..0e0fda786afe 100644 --- a/net/unix/diag.c +++ b/net/unix/diag.c @@ -43,6 +43,26 @@ rtattr_failure: return -EMSGSIZE; } +static int sk_diag_dump_peer(struct sock *sk, struct sk_buff *nlskb) +{ + struct sock *peer; + int ino; + + peer = unix_peer_get(sk); + if (peer) { + unix_state_lock(peer); + ino = sock_i_ino(peer); + unix_state_unlock(peer); + sock_put(peer); + + RTA_PUT_U32(nlskb, UNIX_DIAG_PEER, ino); + } + + return 0; +rtattr_failure: + return -EMSGSIZE; +} + static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, struct unix_diag_req *req, u32 pid, u32 seq, u32 flags, int sk_ino) { @@ -69,6 +89,10 @@ static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, struct unix_diag_r sk_diag_dump_vfs(sk, skb)) goto nlmsg_failure; + if ((req->udiag_show & UDIAG_SHOW_PEER) && + sk_diag_dump_peer(sk, skb)) + goto nlmsg_failure; + nlh->nlmsg_len = skb_tail_pointer(skb) - b; return skb->len; |