Illumos Crypto Port module added to enable native encryption in zfs

A port of the Illumos Crypto Framework to a Linux kernel module (found
in module/icp). This is needed to do the actual encryption work. We cannot
use the Linux kernel's built in crypto api because it is only exported to
GPL-licensed modules. Having the ICP also means the crypto code can run on
any of the other kernels under OpenZFS. I ended up porting over most of the
internals of the framework, which means that porting over other API calls (if
we need them) should be fairly easy. Specifically, I have ported over the API
functions related to encryption, digests, macs, and crypto templates. The ICP
is able to use assembly-accelerated encryption on amd64 machines and AES-NI
instructions on Intel chips that support it. There are place-holder
directories for similar assembly optimizations for other architectures
(although they have not been written).

Signed-off-by: Tom Caputi <tcaputi@datto.com>
Signed-off-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #4329

lib/libspl/include/sys/byteorder.h

@@ -128,6 +128,28 @@ extern	in_port_t ntohs(in_port_t);
 #define	BE_64(x)	BSWAP_64(x)
 #endif
 
+#ifdef _BIG_ENDIAN
+static __inline__ uint64_t
+htonll(uint64_t n) {
+	return (n);
+}
+
+static __inline__ uint64_t
+ntohll(uint64_t n) {
+	return (n);
+}
+#else
+static __inline__ uint64_t
+htonll(uint64_t n) {
+	return ((((uint64_t)htonl(n)) << 32) + htonl(n >> 32));
+}
+
+static __inline__ uint64_t
+ntohll(uint64_t n) {
+	return ((((uint64_t)ntohl(n)) << 32) + ntohl(n >> 32));
+}
+#endif
+
 /*
  * Macros to read unaligned values from a specific byte order to
  * native byte order

lib/libspl/include/sys/file.h

@@ -33,7 +33,7 @@
 
 #define	FREAD	1
 #define	FWRITE	2
-// #define FAPPEND  8
+// #define	FAPPEND  8
 
 #define	FCREAT	O_CREAT
 #define	FTRUNC	O_TRUNC

lib/libspl/include/sys/types.h

@@ -64,6 +64,7 @@ typedef int		major_t;
 typedef int		minor_t;
 
 typedef ushort_t o_mode_t; /* old file attribute type */
+typedef short		index_t;
 
 /*
  * Definitions remaining from previous partial support for 64-bit file