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authorPavel Emelyanov <xemul@parallels.com>2011-12-15 02:45:43 +0000
committerDavid S. Miller <davem@davemloft.net>2011-12-16 13:48:28 -0500
commit5f7b0569460b7d8d01ca776430a00505a68b7584 (patch)
treef67c5033fb1fe17b45e4b45cbbb162428216f37d /net/unix
parentf5248b48a64c221dd6157ab9cbee5a36ee45e6ed (diff)
downloadop-kernel-dev-5f7b0569460b7d8d01ca776430a00505a68b7584.zip
op-kernel-dev-5f7b0569460b7d8d01ca776430a00505a68b7584.tar.gz
unix_diag: Unix inode info NLA
Actually, the socket path if it's not anonymous doesn't give a clue to which file the socket is bound to. Even if the path is absolute, it can be unlinked and then new socket can be bound to it. With this NLA it's possible to check which file a particular socket is really bound to. Signed-off-by: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/unix')
-rw-r--r--net/unix/diag.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/net/unix/diag.c b/net/unix/diag.c
index 161ce6c..83799ef1 100644
--- a/net/unix/diag.c
+++ b/net/unix/diag.c
@@ -26,6 +26,23 @@ rtattr_failure:
return -EMSGSIZE;
}
+static int sk_diag_dump_vfs(struct sock *sk, struct sk_buff *nlskb)
+{
+ struct dentry *dentry = unix_sk(sk)->dentry;
+ struct unix_diag_vfs *uv;
+
+ if (dentry) {
+ uv = UNIX_DIAG_PUT(nlskb, UNIX_DIAG_VFS, sizeof(*uv));
+ uv->udiag_vfs_ino = dentry->d_inode->i_ino;
+ uv->udiag_vfs_dev = dentry->d_sb->s_dev;
+ }
+
+ 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)
{
@@ -48,6 +65,10 @@ static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, struct unix_diag_r
sk_diag_dump_name(sk, skb))
goto nlmsg_failure;
+ if ((req->udiag_show & UDIAG_SHOW_VFS) &&
+ sk_diag_dump_vfs(sk, skb))
+ goto nlmsg_failure;
+
nlh->nlmsg_len = skb_tail_pointer(skb) - b;
return skb->len;
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