Make the needlessly global function tls_sw_free_resources static to fix
a gcc/sparse warning.
Signed-off-by: NTobias Klauser <tklauser@distanz.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

copy_to_user() copies the struct the pointer is pointing to, but the
length check compares against sizeof(pointer) and not sizeof(struct).
On 32-bit the size is probably the same, so it might have worked
accidentally.
Signed-off-by: NMatthias Rosenfelder <mrosenfelder.lkml@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The copy_to_user() function returns the number of bytes remaining but we
want to return -EFAULT here.

Fixes: 3c4d7559 ("tls: kernel TLS support")
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Acked-by: NDave Watson <davejwatson@fb.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Missing crypto deps for some platforms.
Default to n for new module.

config: m68k-amcore_defconfig (attached as .config)
compiler: m68k-linux-gcc (GCC) 4.9.0

make.cross ARCH=m68k
All errors (new ones prefixed by >>):

   net/built-in.o: In function `tls_set_sw_offload':
>> (.text+0x732f8): undefined reference to `crypto_alloc_aead'
   net/built-in.o: In function `tls_set_sw_offload':
>> (.text+0x7333c): undefined reference to `crypto_aead_setkey'
   net/built-in.o: In function `tls_set_sw_offload':
>> (.text+0x73354): undefined reference to `crypto_aead_setauthsize'
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Signed-off-by: NDave Watson <davejwatson@fb.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

We refer to TCP et al. symbols so have to use INET as
the dependency.

   ERROR: "tcp_prot" [net/tls/tls.ko] undefined!
>> ERROR: "tcp_rate_check_app_limited" [net/tls/tls.ko] undefined!
   ERROR: "tcp_register_ulp" [net/tls/tls.ko] undefined!
   ERROR: "tcp_unregister_ulp" [net/tls/tls.ko] undefined!
   ERROR: "do_tcp_sendpages" [net/tls/tls.ko] undefined!
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Software implementation of transport layer security, implemented using ULP
infrastructure.  tcp proto_ops are replaced with tls equivalents of sendmsg and
sendpage.

Only symmetric crypto is done in the kernel, keys are passed by setsockopt
after the handshake is complete.  All control messages are supported via CMSG
data - the actual symmetric encryption is the same, just the message type needs
to be passed separately.

For user API, please see Documentation patch.

Pieces that can be shared between hw and sw implementation
are in tls_main.c
Signed-off-by: NBoris Pismenny <borisp@mellanox.com>
Signed-off-by: NIlya Lesokhin <ilyal@mellanox.com>
Signed-off-by: NAviad Yehezkel <aviadye@mellanox.com>
Signed-off-by: NDave Watson <davejwatson@fb.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>