| Message ID | 20200513062649.2100053-30-hch@lst.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [01/33] net: add sock_set_reuseaddr | expand |
Christoph Hellwig <hch@lst.de> wrote: > +int rxrpc_sock_set_min_security_level(struct sock *sk, unsigned int val); > + Looks good - but you do need to add this to Documentation/networking/rxrpc.txt also, thanks. David
On Wed, May 13, 2020 at 02:13:07PM +0100, David Howells wrote: > Christoph Hellwig <hch@lst.de> wrote: > > > +int rxrpc_sock_set_min_security_level(struct sock *sk, unsigned int val); > > + > > Looks good - but you do need to add this to Documentation/networking/rxrpc.txt > also, thanks. That file doesn't exist, instead we now have a cumentation/networking/rxrpc.rst in weird markup. Where do you want this to be added, and with what text? Remember I don't really know what this thing does, I just provide a shortcut.
Christoph Hellwig <hch@lst.de> wrote: > > Looks good - but you do need to add this to Documentation/networking/rxrpc.txt > > also, thanks. > > That file doesn't exist, instead we now have a > cumentation/networking/rxrpc.rst in weird markup. Yeah - that's only in net/next thus far. > Where do you want this to be added, and with what text? Remember I don't > really know what this thing does, I just provide a shortcut. The document itself describes what each rxrpc sockopt does. Just look for RXRPC_MIN_SECURITY_LEVEL in there;-) Anyway, see the attached. This also fixes a couple of errors in the doc that I noticed. David --- diff --git a/Documentation/networking/rxrpc.rst b/Documentation/networking/rxrpc.rst index 5ad35113d0f4..68552b92dc44 100644 --- a/Documentation/networking/rxrpc.rst +++ b/Documentation/networking/rxrpc.rst @@ -477,7 +477,7 @@ AF_RXRPC sockets support a few socket options at the SOL_RXRPC level: Encrypted checksum plus packet padded and first eight bytes of packet encrypted - which includes the actual packet length. - (c) RXRPC_SECURITY_ENCRYPTED + (c) RXRPC_SECURITY_ENCRYPT Encrypted checksum plus entire packet padded and encrypted, including actual packet length. @@ -578,7 +578,7 @@ A client would issue an operation by: This issues a request_key() to get the key representing the security context. The minimum security level can be set:: - unsigned int sec = RXRPC_SECURITY_ENCRYPTED; + unsigned int sec = RXRPC_SECURITY_ENCRYPT; setsockopt(client, SOL_RXRPC, RXRPC_MIN_SECURITY_LEVEL, &sec, sizeof(sec)); @@ -1090,6 +1090,15 @@ The kernel interface functions are as follows: jiffies). In the event of the timeout occurring, the call will be aborted and -ETIME or -ETIMEDOUT will be returned. + (#) Apply the RXRPC_MIN_SECURITY_LEVEL sockopt to a socket from within in the + kernel:: + + int rxrpc_sock_set_min_security_level(struct sock *sk, + unsigned int val); + + This specifies the minimum security level required for calls on this + socket. + Configurable Parameters ======================= diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c index 7dfcbd58da85..e313dae01674 100644 --- a/fs/afs/rxrpc.c +++ b/fs/afs/rxrpc.c @@ -57,7 +57,7 @@ int afs_open_socket(struct afs_net *net) srx.transport.sin6.sin6_port = htons(AFS_CM_PORT); ret = rxrpc_sock_set_min_security_level(socket->sk, - RXRPC_SECURITY_ENCRYPT); + RXRPC_SECURITY_ENCRYPT); if (ret < 0) goto error_2;
diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c index 1ecc67da6c1a4..7dfcbd58da85c 100644 --- a/fs/afs/rxrpc.c +++ b/fs/afs/rxrpc.c @@ -37,7 +37,6 @@ int afs_open_socket(struct afs_net *net) { struct sockaddr_rxrpc srx; struct socket *socket; - unsigned int min_level; int ret; _enter(""); @@ -57,9 +56,8 @@ int afs_open_socket(struct afs_net *net) srx.transport.sin6.sin6_family = AF_INET6; srx.transport.sin6.sin6_port = htons(AFS_CM_PORT); - min_level = RXRPC_SECURITY_ENCRYPT; - ret = kernel_setsockopt(socket, SOL_RXRPC, RXRPC_MIN_SECURITY_LEVEL, - (void *)&min_level, sizeof(min_level)); + ret = rxrpc_sock_set_min_security_level(socket->sk, + RXRPC_SECURITY_ENCRYPT); if (ret < 0) goto error_2; diff --git a/include/net/af_rxrpc.h b/include/net/af_rxrpc.h index 04e97bab6f28b..8d7b469453bda 100644 --- a/include/net/af_rxrpc.h +++ b/include/net/af_rxrpc.h @@ -72,4 +72,6 @@ bool rxrpc_kernel_call_is_complete(struct rxrpc_call *); void rxrpc_kernel_set_max_life(struct socket *, struct rxrpc_call *, unsigned long); +int rxrpc_sock_set_min_security_level(struct sock *sk, unsigned int val); + #endif /* _NET_RXRPC_H */ diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c index 15ee92d795815..394189b81849f 100644 --- a/net/rxrpc/af_rxrpc.c +++ b/net/rxrpc/af_rxrpc.c @@ -571,6 +571,19 @@ static int rxrpc_sendmsg(struct socket *sock, struct msghdr *m, size_t len) return ret; } +int rxrpc_sock_set_min_security_level(struct sock *sk, unsigned int val) +{ + if (sk->sk_state != RXRPC_UNBOUND) + return -EISCONN; + if (val > RXRPC_SECURITY_MAX) + return -EINVAL; + lock_sock(sk); + rxrpc_sk(sk)->min_sec_level = val; + release_sock(sk); + return 0; +} +EXPORT_SYMBOL(rxrpc_sock_set_min_security_level); + /* * set RxRPC socket options */
Add a helper to directly set the RXRPC_MIN_SECURITY_LEVEL sockopt from kernel space without going through a fake uaccess. Signed-off-by: Christoph Hellwig <hch@lst.de> --- fs/afs/rxrpc.c | 6 ++---- include/net/af_rxrpc.h | 2 ++ net/rxrpc/af_rxrpc.c | 13 +++++++++++++ 3 files changed, 17 insertions(+), 4 deletions(-)