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authorLinus Torvalds <torvalds@linux-foundation.org>2013-11-13 17:40:34 +0900
committerLinus Torvalds <torvalds@linux-foundation.org>2013-11-13 17:40:34 +0900
commit42a2d923cc349583ebf6fdd52a7d35e1c2f7e6bd (patch)
tree2b2b0c03b5389c1301800119333967efafd994ca /lib
parent5cbb3d216e2041700231bcfc383ee5f8b7fc8b74 (diff)
parent75ecab1df14d90e86cebef9ec5c76befde46e65f (diff)
downloadlinux-42a2d923cc349583ebf6fdd52a7d35e1c2f7e6bd.tar.bz2
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
Pull networking updates from David Miller: 1) The addition of nftables. No longer will we need protocol aware firewall filtering modules, it can all live in userspace. At the core of nftables is a, for lack of a better term, virtual machine that executes byte codes to inspect packet or metadata (arriving interface index, etc.) and make verdict decisions. Besides support for loading packet contents and comparing them, the interpreter supports lookups in various datastructures as fundamental operations. For example sets are supports, and therefore one could create a set of whitelist IP address entries which have ACCEPT verdicts attached to them, and use the appropriate byte codes to do such lookups. Since the interpreted code is composed in userspace, userspace can do things like optimize things before giving it to the kernel. Another major improvement is the capability of atomically updating portions of the ruleset. In the existing netfilter implementation, one has to update the entire rule set in order to make a change and this is very expensive. Userspace tools exist to create nftables rules using existing netfilter rule sets, but both kernel implementations will need to co-exist for quite some time as we transition from the old to the new stuff. Kudos to Patrick McHardy, Pablo Neira Ayuso, and others who have worked so hard on this. 2) Daniel Borkmann and Hannes Frederic Sowa made several improvements to our pseudo-random number generator, mostly used for things like UDP port randomization and netfitler, amongst other things. In particular the taus88 generater is updated to taus113, and test cases are added. 3) Support 64-bit rates in HTB and TBF schedulers, from Eric Dumazet and Yang Yingliang. 4) Add support for new 577xx tigon3 chips to tg3 driver, from Nithin Sujir. 5) Fix two fatal flaws in TCP dynamic right sizing, from Eric Dumazet, Neal Cardwell, and Yuchung Cheng. 6) Allow IP_TOS and IP_TTL to be specified in sendmsg() ancillary control message data, much like other socket option attributes. From Francesco Fusco. 7) Allow applications to specify a cap on the rate computed automatically by the kernel for pacing flows, via a new SO_MAX_PACING_RATE socket option. From Eric Dumazet. 8) Make the initial autotuned send buffer sizing in TCP more closely reflect actual needs, from Eric Dumazet. 9) Currently early socket demux only happens for TCP sockets, but we can do it for connected UDP sockets too. Implementation from Shawn Bohrer. 10) Refactor inet socket demux with the goal of improving hash demux performance for listening sockets. With the main goals being able to use RCU lookups on even request sockets, and eliminating the listening lock contention. From Eric Dumazet. 11) The bonding layer has many demuxes in it's fast path, and an RCU conversion was started back in 3.11, several changes here extend the RCU usage to even more locations. From Ding Tianhong and Wang Yufen, based upon suggestions by Nikolay Aleksandrov and Veaceslav Falico. 12) Allow stackability of segmentation offloads to, in particular, allow segmentation offloading over tunnels. From Eric Dumazet. 13) Significantly improve the handling of secret keys we input into the various hash functions in the inet hashtables, TCP fast open, as well as syncookies. From Hannes Frederic Sowa. The key fundamental operation is "net_get_random_once()" which uses static keys. Hannes even extended this to ipv4/ipv6 fragmentation handling and our generic flow dissector. 14) The generic driver layer takes care now to set the driver data to NULL on device removal, so it's no longer necessary for drivers to explicitly set it to NULL any more. Many drivers have been cleaned up in this way, from Jingoo Han. 15) Add a BPF based packet scheduler classifier, from Daniel Borkmann. 16) Improve CRC32 interfaces and generic SKB checksum iterators so that SCTP's checksumming can more cleanly be handled. Also from Daniel Borkmann. 17) Add a new PMTU discovery mode, IP_PMTUDISC_INTERFACE, which forces using the interface MTU value. This helps avoid PMTU attacks, particularly on DNS servers. From Hannes Frederic Sowa. 18) Use generic XPS for transmit queue steering rather than internal (re-)implementation in virtio-net. From Jason Wang. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1622 commits) random32: add test cases for taus113 implementation random32: upgrade taus88 generator to taus113 from errata paper random32: move rnd_state to linux/random.h random32: add prandom_reseed_late() and call when nonblocking pool becomes initialized random32: add periodic reseeding random32: fix off-by-one in seeding requirement PHY: Add RTL8201CP phy_driver to realtek xtsonic: add missing platform_set_drvdata() in xtsonic_probe() macmace: add missing platform_set_drvdata() in mace_probe() ethernet/arc/arc_emac: add missing platform_set_drvdata() in arc_emac_probe() ipv6: protect for_each_sk_fl_rcu in mem_check with rcu_read_lock_bh vlan: Implement vlan_dev_get_egress_qos_mask as an inline. ixgbe: add warning when max_vfs is out of range. igb: Update link modes display in ethtool netfilter: push reasm skb through instead of original frag skbs ip6_output: fragment outgoing reassembled skb properly MAINTAINERS: mv643xx_eth: take over maintainership from Lennart net_sched: tbf: support of 64bit rates ixgbe: deleting dfwd stations out of order can cause null ptr deref ixgbe: fix build err, num_rx_queues is only available with CONFIG_RPS ...
Diffstat (limited to 'lib')
-rw-r--r--lib/Kconfig7
-rw-r--r--lib/crc32.c456
-rw-r--r--lib/random32.c307
3 files changed, 536 insertions, 234 deletions
diff --git a/lib/Kconfig b/lib/Kconfig
index b3c8be0da17f..75485e163ca3 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -189,6 +189,13 @@ config AUDIT_GENERIC
depends on AUDIT && !AUDIT_ARCH
default y
+config RANDOM32_SELFTEST
+ bool "PRNG perform self test on init"
+ default n
+ help
+ This option enables the 32 bit PRNG library functions to perform a
+ self test on initialization.
+
#
# compression support is select'ed if needed
#
diff --git a/lib/crc32.c b/lib/crc32.c
index 410093dbe51c..70f00ca5ef1e 100644
--- a/lib/crc32.c
+++ b/lib/crc32.c
@@ -29,6 +29,7 @@
#include <linux/crc32.h>
#include <linux/module.h>
#include <linux/types.h>
+#include <linux/sched.h>
#include "crc32defs.h"
#if CRC_LE_BITS > 8
@@ -49,6 +50,30 @@ MODULE_AUTHOR("Matt Domsch <Matt_Domsch@dell.com>");
MODULE_DESCRIPTION("Various CRC32 calculations");
MODULE_LICENSE("GPL");
+#define GF2_DIM 32
+
+static u32 gf2_matrix_times(u32 *mat, u32 vec)
+{
+ u32 sum = 0;
+
+ while (vec) {
+ if (vec & 1)
+ sum ^= *mat;
+ vec >>= 1;
+ mat++;
+ }
+
+ return sum;
+}
+
+static void gf2_matrix_square(u32 *square, u32 *mat)
+{
+ int i;
+
+ for (i = 0; i < GF2_DIM; i++)
+ square[i] = gf2_matrix_times(mat, mat[i]);
+}
+
#if CRC_LE_BITS > 8 || CRC_BE_BITS > 8
/* implements slicing-by-4 or slicing-by-8 algorithm */
@@ -130,6 +155,52 @@ crc32_body(u32 crc, unsigned char const *buf, size_t len, const u32 (*tab)[256])
}
#endif
+/* For conditions of distribution and use, see copyright notice in zlib.h */
+static u32 crc32_generic_combine(u32 crc1, u32 crc2, size_t len2,
+ u32 polynomial)
+{
+ u32 even[GF2_DIM]; /* Even-power-of-two zeros operator */
+ u32 odd[GF2_DIM]; /* Odd-power-of-two zeros operator */
+ u32 row;
+ int i;
+
+ if (len2 <= 0)
+ return crc1;
+
+ /* Put operator for one zero bit in odd */
+ odd[0] = polynomial;
+ row = 1;
+ for (i = 1; i < GF2_DIM; i++) {
+ odd[i] = row;
+ row <<= 1;
+ }
+
+ gf2_matrix_square(even, odd); /* Put operator for two zero bits in even */
+ gf2_matrix_square(odd, even); /* Put operator for four zero bits in odd */
+
+ /* Apply len2 zeros to crc1 (first square will put the operator for one
+ * zero byte, eight zero bits, in even).
+ */
+ do {
+ /* Apply zeros operator for this bit of len2 */
+ gf2_matrix_square(even, odd);
+ if (len2 & 1)
+ crc1 = gf2_matrix_times(even, crc1);
+ len2 >>= 1;
+ /* If no more bits set, then done */
+ if (len2 == 0)
+ break;
+ /* Another iteration of the loop with odd and even swapped */
+ gf2_matrix_square(odd, even);
+ if (len2 & 1)
+ crc1 = gf2_matrix_times(odd, crc1);
+ len2 >>= 1;
+ } while (len2 != 0);
+
+ crc1 ^= crc2;
+ return crc1;
+}
+
/**
* crc32_le_generic() - Calculate bitwise little-endian Ethernet AUTODIN II
* CRC32/CRC32C
@@ -200,8 +271,19 @@ u32 __pure __crc32c_le(u32 crc, unsigned char const *p, size_t len)
(const u32 (*)[256])crc32ctable_le, CRC32C_POLY_LE);
}
#endif
+u32 __pure crc32_le_combine(u32 crc1, u32 crc2, size_t len2)
+{
+ return crc32_generic_combine(crc1, crc2, len2, CRCPOLY_LE);
+}
+
+u32 __pure __crc32c_le_combine(u32 crc1, u32 crc2, size_t len2)
+{
+ return crc32_generic_combine(crc1, crc2, len2, CRC32C_POLY_LE);
+}
EXPORT_SYMBOL(crc32_le);
+EXPORT_SYMBOL(crc32_le_combine);
EXPORT_SYMBOL(__crc32c_le);
+EXPORT_SYMBOL(__crc32c_le_combine);
/**
* crc32_be_generic() - Calculate bitwise big-endian Ethernet AUTODIN II CRC32
@@ -795,206 +877,106 @@ static struct crc_test {
u32 crc32c_le; /* expected crc32c_le result */
} test[] =
{
- {0x674bf11d, 0x00000038, 0x00000542, 0x0af6d466, 0xd8b6e4c1,
- 0xf6e93d6c},
- {0x35c672c6, 0x0000003a, 0x000001aa, 0xc6d3dfba, 0x28aaf3ad,
- 0x0fe92aca},
- {0x496da28e, 0x00000039, 0x000005af, 0xd933660f, 0x5d57e81f,
- 0x52e1ebb8},
- {0x09a9b90e, 0x00000027, 0x000001f8, 0xb45fe007, 0xf45fca9a,
- 0x0798af9a},
- {0xdc97e5a9, 0x00000025, 0x000003b6, 0xf81a3562, 0xe0126ba2,
- 0x18eb3152},
- {0x47c58900, 0x0000000a, 0x000000b9, 0x8e58eccf, 0xf3afc793,
- 0xd00d08c7},
- {0x292561e8, 0x0000000c, 0x00000403, 0xa2ba8aaf, 0x0b797aed,
- 0x8ba966bc},
- {0x415037f6, 0x00000003, 0x00000676, 0xa17d52e8, 0x7f0fdf35,
- 0x11d694a2},
- {0x3466e707, 0x00000026, 0x00000042, 0x258319be, 0x75c484a2,
- 0x6ab3208d},
- {0xafd1281b, 0x00000023, 0x000002ee, 0x4428eaf8, 0x06c7ad10,
- 0xba4603c5},
- {0xd3857b18, 0x00000028, 0x000004a2, 0x5c430821, 0xb062b7cb,
- 0xe6071c6f},
- {0x1d825a8f, 0x0000002b, 0x0000050b, 0xd2c45f0c, 0xd68634e0,
- 0x179ec30a},
- {0x5033e3bc, 0x0000000b, 0x00000078, 0xa3ea4113, 0xac6d31fb,
- 0x0903beb8},
- {0x94f1fb5e, 0x0000000f, 0x000003a2, 0xfbfc50b1, 0x3cfe50ed,
- 0x6a7cb4fa},
- {0xc9a0fe14, 0x00000009, 0x00000473, 0x5fb61894, 0x87070591,
- 0xdb535801},
- {0x88a034b1, 0x0000001c, 0x000005ad, 0xc1b16053, 0x46f95c67,
- 0x92bed597},
- {0xf0f72239, 0x00000020, 0x0000026d, 0xa6fa58f3, 0xf8c2c1dd,
- 0x192a3f1b},
- {0xcc20a5e3, 0x0000003b, 0x0000067a, 0x7740185a, 0x308b979a,
- 0xccbaec1a},
- {0xce589c95, 0x0000002b, 0x00000641, 0xd055e987, 0x40aae25b,
- 0x7eabae4d},
- {0x78edc885, 0x00000035, 0x000005be, 0xa39cb14b, 0x035b0d1f,
- 0x28c72982},
- {0x9d40a377, 0x0000003b, 0x00000038, 0x1f47ccd2, 0x197fbc9d,
- 0xc3cd4d18},
- {0x703d0e01, 0x0000003c, 0x000006f1, 0x88735e7c, 0xfed57c5a,
- 0xbca8f0e7},
- {0x776bf505, 0x0000000f, 0x000005b2, 0x5cc4fc01, 0xf32efb97,
- 0x713f60b3},
- {0x4a3e7854, 0x00000027, 0x000004b8, 0x8d923c82, 0x0cbfb4a2,
- 0xebd08fd5},
- {0x209172dd, 0x0000003b, 0x00000356, 0xb89e9c2b, 0xd7868138,
- 0x64406c59},
- {0x3ba4cc5b, 0x0000002f, 0x00000203, 0xe51601a9, 0x5b2a1032,
- 0x7421890e},
- {0xfc62f297, 0x00000000, 0x00000079, 0x71a8e1a2, 0x5d88685f,
- 0xe9347603},
- {0x64280b8b, 0x00000016, 0x000007ab, 0x0fa7a30c, 0xda3a455f,
- 0x1bef9060},
- {0x97dd724b, 0x00000033, 0x000007ad, 0x5788b2f4, 0xd7326d32,
- 0x34720072},
- {0x61394b52, 0x00000035, 0x00000571, 0xc66525f1, 0xcabe7fef,
- 0x48310f59},
- {0x29b4faff, 0x00000024, 0x0000006e, 0xca13751e, 0x993648e0,
- 0x783a4213},
- {0x29bfb1dc, 0x0000000b, 0x00000244, 0x436c43f7, 0x429f7a59,
- 0x9e8efd41},
- {0x86ae934b, 0x00000035, 0x00000104, 0x0760ec93, 0x9cf7d0f4,
- 0xfc3d34a5},
- {0xc4c1024e, 0x0000002e, 0x000006b1, 0x6516a3ec, 0x19321f9c,
- 0x17a52ae2},
- {0x3287a80a, 0x00000026, 0x00000496, 0x0b257eb1, 0x754ebd51,
- 0x886d935a},
- {0xa4db423e, 0x00000023, 0x0000045d, 0x9b3a66dc, 0x873e9f11,
- 0xeaaeaeb2},
- {0x7a1078df, 0x00000015, 0x0000014a, 0x8c2484c5, 0x6a628659,
- 0x8e900a4b},
- {0x6048bd5b, 0x00000006, 0x0000006a, 0x897e3559, 0xac9961af,
- 0xd74662b1},
- {0xd8f9ea20, 0x0000003d, 0x00000277, 0x60eb905b, 0xed2aaf99,
- 0xd26752ba},
- {0xea5ec3b4, 0x0000002a, 0x000004fe, 0x869965dc, 0x6c1f833b,
- 0x8b1fcd62},
- {0x2dfb005d, 0x00000016, 0x00000345, 0x6a3b117e, 0xf05e8521,
- 0xf54342fe},
- {0x5a214ade, 0x00000020, 0x000005b6, 0x467f70be, 0xcb22ccd3,
- 0x5b95b988},
- {0xf0ab9cca, 0x00000032, 0x00000515, 0xed223df3, 0x7f3ef01d,
- 0x2e1176be},
- {0x91b444f9, 0x0000002e, 0x000007f8, 0x84e9a983, 0x5676756f,
- 0x66120546},
- {0x1b5d2ddb, 0x0000002e, 0x0000012c, 0xba638c4c, 0x3f42047b,
- 0xf256a5cc},
- {0xd824d1bb, 0x0000003a, 0x000007b5, 0x6288653b, 0x3a3ebea0,
- 0x4af1dd69},
- {0x0470180c, 0x00000034, 0x000001f0, 0x9d5b80d6, 0x3de08195,
- 0x56f0a04a},
- {0xffaa3a3f, 0x00000036, 0x00000299, 0xf3a82ab8, 0x53e0c13d,
- 0x74f6b6b2},
- {0x6406cfeb, 0x00000023, 0x00000600, 0xa920b8e8, 0xe4e2acf4,
- 0x085951fd},
- {0xb24aaa38, 0x0000003e, 0x000004a1, 0x657cc328, 0x5077b2c3,
- 0xc65387eb},
- {0x58b2ab7c, 0x00000039, 0x000002b4, 0x3a17ee7e, 0x9dcb3643,
- 0x1ca9257b},
- {0x3db85970, 0x00000006, 0x000002b6, 0x95268b59, 0xb9812c10,
- 0xfd196d76},
- {0x857830c5, 0x00000003, 0x00000590, 0x4ef439d5, 0xf042161d,
- 0x5ef88339},
- {0xe1fcd978, 0x0000003e, 0x000007d8, 0xae8d8699, 0xce0a1ef5,
- 0x2c3714d9},
- {0xb982a768, 0x00000016, 0x000006e0, 0x62fad3df, 0x5f8a067b,
- 0x58576548},
- {0x1d581ce8, 0x0000001e, 0x0000058b, 0xf0f5da53, 0x26e39eee,
- 0xfd7c57de},
- {0x2456719b, 0x00000025, 0x00000503, 0x4296ac64, 0xd50e4c14,
- 0xd5fedd59},
- {0xfae6d8f2, 0x00000000, 0x0000055d, 0x057fdf2e, 0x2a31391a,
- 0x1cc3b17b},
- {0xcba828e3, 0x00000039, 0x000002ce, 0xe3f22351, 0x8f00877b,
- 0x270eed73},
- {0x13d25952, 0x0000000a, 0x0000072d, 0x76d4b4cc, 0x5eb67ec3,
- 0x91ecbb11},
- {0x0342be3f, 0x00000015, 0x00000599, 0xec75d9f1, 0x9d4d2826,
- 0x05ed8d0c},
- {0xeaa344e0, 0x00000014, 0x000004d8, 0x72a4c981, 0x2064ea06,
- 0x0b09ad5b},
- {0xbbb52021, 0x0000003b, 0x00000272, 0x04af99fc, 0xaf042d35,
- 0xf8d511fb},
- {0xb66384dc, 0x0000001d, 0x000007fc, 0xd7629116, 0x782bd801,
- 0x5ad832cc},
- {0x616c01b6, 0x00000022, 0x000002c8, 0x5b1dab30, 0x783ce7d2,
- 0x1214d196},
- {0xce2bdaad, 0x00000016, 0x0000062a, 0x932535c8, 0x3f02926d,
- 0x5747218a},
- {0x00fe84d7, 0x00000005, 0x00000205, 0x850e50aa, 0x753d649c,
- 0xde8f14de},
- {0xbebdcb4c, 0x00000006, 0x0000055d, 0xbeaa37a2, 0x2d8c9eba,
- 0x3563b7b9},
- {0xd8b1a02a, 0x00000010, 0x00000387, 0x5017d2fc, 0x503541a5,
- 0x071475d0},
- {0x3b96cad2, 0x00000036, 0x00000347, 0x1d2372ae, 0x926cd90b,
- 0x54c79d60},
- {0xc94c1ed7, 0x00000005, 0x0000038b, 0x9e9fdb22, 0x144a9178,
- 0x4c53eee6},
- {0x1aad454e, 0x00000025, 0x000002b2, 0xc3f6315c, 0x5c7a35b3,
- 0x10137a3c},
- {0xa4fec9a6, 0x00000000, 0x000006d6, 0x90be5080, 0xa4107605,
- 0xaa9d6c73},
- {0x1bbe71e2, 0x0000001f, 0x000002fd, 0x4e504c3b, 0x284ccaf1,
- 0xb63d23e7},
- {0x4201c7e4, 0x00000002, 0x000002b7, 0x7822e3f9, 0x0cc912a9,
- 0x7f53e9cf},
- {0x23fddc96, 0x00000003, 0x00000627, 0x8a385125, 0x07767e78,
- 0x13c1cd83},
- {0xd82ba25c, 0x00000016, 0x0000063e, 0x98e4148a, 0x283330c9,
- 0x49ff5867},
- {0x786f2032, 0x0000002d, 0x0000060f, 0xf201600a, 0xf561bfcd,
- 0x8467f211},
- {0xfebe4e1f, 0x0000002a, 0x000004f2, 0x95e51961, 0xfd80dcab,
- 0x3f9683b2},
- {0x1a6e0a39, 0x00000008, 0x00000672, 0x8af6c2a5, 0x78dd84cb,
- 0x76a3f874},
- {0x56000ab8, 0x0000000e, 0x000000e5, 0x36bacb8f, 0x22ee1f77,
- 0x863b702f},
- {0x4717fe0c, 0x00000000, 0x000006ec, 0x8439f342, 0x5c8e03da,
- 0xdc6c58ff},
- {0xd5d5d68e, 0x0000003c, 0x000003a3, 0x46fff083, 0x177d1b39,
- 0x0622cc95},
- {0xc25dd6c6, 0x00000024, 0x000006c0, 0x5ceb8eb4, 0x892b0d16,
- 0xe85605cd},
- {0xe9b11300, 0x00000023, 0x00000683, 0x07a5d59a, 0x6c6a3208,
- 0x31da5f06},
- {0x95cd285e, 0x00000001, 0x00000047, 0x7b3a4368, 0x0202c07e,
- 0xa1f2e784},
- {0xd9245a25, 0x0000001e, 0x000003a6, 0xd33c1841, 0x1936c0d5,
- 0xb07cc616},
- {0x103279db, 0x00000006, 0x0000039b, 0xca09b8a0, 0x77d62892,
- 0xbf943b6c},
- {0x1cba3172, 0x00000027, 0x000001c8, 0xcb377194, 0xebe682db,
- 0x2c01af1c},
- {0x8f613739, 0x0000000c, 0x000001df, 0xb4b0bc87, 0x7710bd43,
- 0x0fe5f56d},
- {0x1c6aa90d, 0x0000001b, 0x0000053c, 0x70559245, 0xda7894ac,
- 0xf8943b2d},
- {0xaabe5b93, 0x0000003d, 0x00000715, 0xcdbf42fa, 0x0c3b99e7,
- 0xe4d89272},
- {0xf15dd038, 0x00000006, 0x000006db, 0x6e104aea, 0x8d5967f2,
- 0x7c2f6bbb},
- {0x584dd49c, 0x00000020, 0x000007bc, 0x36b6cfd6, 0xad4e23b2,
- 0xabbf388b},
- {0x5d8c9506, 0x00000020, 0x00000470, 0x4c62378e, 0x31d92640,
- 0x1dca1f4e},
- {0xb80d17b0, 0x00000032, 0x00000346, 0x22a5bb88, 0x9a7ec89f,
- 0x5c170e23},
- {0xdaf0592e, 0x00000023, 0x000007b0, 0x3cab3f99, 0x9b1fdd99,
- 0xc0e9d672},
- {0x4793cc85, 0x0000000d, 0x00000706, 0xe82e04f6, 0xed3db6b7,
- 0xc18bdc86},
- {0x82ebf64e, 0x00000009, 0x000007c3, 0x69d590a9, 0x9efa8499,
- 0xa874fcdd},
- {0xb18a0319, 0x00000026, 0x000007db, 0x1cf98dcc, 0x8fa9ad6a,
- 0x9dc0bb48},
+ {0x674bf11d, 0x00000038, 0x00000542, 0x0af6d466, 0xd8b6e4c1, 0xf6e93d6c},
+ {0x35c672c6, 0x0000003a, 0x000001aa, 0xc6d3dfba, 0x28aaf3ad, 0x0fe92aca},
+ {0x496da28e, 0x00000039, 0x000005af, 0xd933660f, 0x5d57e81f, 0x52e1ebb8},
+ {0x09a9b90e, 0x00000027, 0x000001f8, 0xb45fe007, 0xf45fca9a, 0x0798af9a},
+ {0xdc97e5a9, 0x00000025, 0x000003b6, 0xf81a3562, 0xe0126ba2, 0x18eb3152},
+ {0x47c58900, 0x0000000a, 0x000000b9, 0x8e58eccf, 0xf3afc793, 0xd00d08c7},
+ {0x292561e8, 0x0000000c, 0x00000403, 0xa2ba8aaf, 0x0b797aed, 0x8ba966bc},
+ {0x415037f6, 0x00000003, 0x00000676, 0xa17d52e8, 0x7f0fdf35, 0x11d694a2},
+ {0x3466e707, 0x00000026, 0x00000042, 0x258319be, 0x75c484a2, 0x6ab3208d},
+ {0xafd1281b, 0x00000023, 0x000002ee, 0x4428eaf8, 0x06c7ad10, 0xba4603c5},
+ {0xd3857b18, 0x00000028, 0x000004a2, 0x5c430821, 0xb062b7cb, 0xe6071c6f},
+ {0x1d825a8f, 0x0000002b, 0x0000050b, 0xd2c45f0c, 0xd68634e0, 0x179ec30a},
+ {0x5033e3bc, 0x0000000b, 0x00000078, 0xa3ea4113, 0xac6d31fb, 0x0903beb8},
+ {0x94f1fb5e, 0x0000000f, 0x000003a2, 0xfbfc50b1, 0x3cfe50ed, 0x6a7cb4fa},
+ {0xc9a0fe14, 0x00000009, 0x00000473, 0x5fb61894, 0x87070591, 0xdb535801},
+ {0x88a034b1, 0x0000001c, 0x000005ad, 0xc1b16053, 0x46f95c67, 0x92bed597},
+ {0xf0f72239, 0x00000020, 0x0000026d, 0xa6fa58f3, 0xf8c2c1dd, 0x192a3f1b},
+ {0xcc20a5e3, 0x0000003b, 0x0000067a, 0x7740185a, 0x308b979a, 0xccbaec1a},
+ {0xce589c95, 0x0000002b, 0x00000641, 0xd055e987, 0x40aae25b, 0x7eabae4d},
+ {0x78edc885, 0x00000035, 0x000005be, 0xa39cb14b, 0x035b0d1f, 0x28c72982},
+ {0x9d40a377, 0x0000003b, 0x00000038, 0x1f47ccd2, 0x197fbc9d, 0xc3cd4d18},
+ {0x703d0e01, 0x0000003c, 0x000006f1, 0x88735e7c, 0xfed57c5a, 0xbca8f0e7},
+ {0x776bf505, 0x0000000f, 0x000005b2, 0x5cc4fc01, 0xf32efb97, 0x713f60b3},
+ {0x4a3e7854, 0x00000027, 0x000004b8, 0x8d923c82, 0x0cbfb4a2, 0xebd08fd5},
+ {0x209172dd, 0x0000003b, 0x00000356, 0xb89e9c2b, 0xd7868138, 0x64406c59},
+ {0x3ba4cc5b, 0x0000002f, 0x00000203, 0xe51601a9, 0x5b2a1032, 0x7421890e},
+ {0xfc62f297, 0x00000000, 0x00000079, 0x71a8e1a2, 0x5d88685f, 0xe9347603},
+ {0x64280b8b, 0x00000016, 0x000007ab, 0x0fa7a30c, 0xda3a455f, 0x1bef9060},
+ {0x97dd724b, 0x00000033, 0x000007ad, 0x5788b2f4, 0xd7326d32, 0x34720072},
+ {0x61394b52, 0x00000035, 0x00000571, 0xc66525f1, 0xcabe7fef, 0x48310f59},
+ {0x29b4faff, 0x00000024, 0x0000006e, 0xca13751e, 0x993648e0, 0x783a4213},
+ {0x29bfb1dc, 0x0000000b, 0x00000244, 0x436c43f7, 0x429f7a59, 0x9e8efd41},
+ {0x86ae934b, 0x00000035, 0x00000104, 0x0760ec93, 0x9cf7d0f4, 0xfc3d34a5},
+ {0xc4c1024e, 0x0000002e, 0x000006b1, 0x6516a3ec, 0x19321f9c, 0x17a52ae2},
+ {0x3287a80a, 0x00000026, 0x00000496, 0x0b257eb1, 0x754ebd51, 0x886d935a},
+ {0xa4db423e, 0x00000023, 0x0000045d, 0x9b3a66dc, 0x873e9f11, 0xeaaeaeb2},
+ {0x7a1078df, 0x00000015, 0x0000014a, 0x8c2484c5, 0x6a628659, 0x8e900a4b},
+ {0x6048bd5b, 0x00000006, 0x0000006a, 0x897e3559, 0xac9961af, 0xd74662b1},
+ {0xd8f9ea20, 0x0000003d, 0x00000277, 0x60eb905b, 0xed2aaf99, 0xd26752ba},
+ {0xea5ec3b4, 0x0000002a, 0x000004fe, 0x869965dc, 0x6c1f833b, 0x8b1fcd62},
+ {0x2dfb005d, 0x00000016, 0x00000345, 0x6a3b117e, 0xf05e8521, 0xf54342fe},
+ {0x5a214ade, 0x00000020, 0x000005b6, 0x467f70be, 0xcb22ccd3, 0x5b95b988},
+ {0xf0ab9cca, 0x00000032, 0x00000515, 0xed223df3, 0x7f3ef01d, 0x2e1176be},
+ {0x91b444f9, 0x0000002e, 0x000007f8, 0x84e9a983, 0x5676756f, 0x66120546},
+ {0x1b5d2ddb, 0x0000002e, 0x0000012c, 0xba638c4c, 0x3f42047b, 0xf256a5cc},
+ {0xd824d1bb, 0x0000003a, 0x000007b5, 0x6288653b, 0x3a3ebea0, 0x4af1dd69},
+ {0x0470180c, 0x00000034, 0x000001f0, 0x9d5b80d6, 0x3de08195, 0x56f0a04a},
+ {0xffaa3a3f, 0x00000036, 0x00000299, 0xf3a82ab8, 0x53e0c13d, 0x74f6b6b2},
+ {0x6406cfeb, 0x00000023, 0x00000600, 0xa920b8e8, 0xe4e2acf4, 0x085951fd},
+ {0xb24aaa38, 0x0000003e, 0x000004a1, 0x657cc328, 0x5077b2c3, 0xc65387eb},
+ {0x58b2ab7c, 0x00000039, 0x000002b4, 0x3a17ee7e, 0x9dcb3643, 0x1ca9257b},
+ {0x3db85970, 0x00000006, 0x000002b6, 0x95268b59, 0xb9812c10, 0xfd196d76},
+ {0x857830c5, 0x00000003, 0x00000590, 0x4ef439d5, 0xf042161d, 0x5ef88339},
+ {0xe1fcd978, 0x0000003e, 0x000007d8, 0xae8d8699, 0xce0a1ef5, 0x2c3714d9},
+ {0xb982a768, 0x00000016, 0x000006e0, 0x62fad3df, 0x5f8a067b, 0x58576548},
+ {0x1d581ce8, 0x0000001e, 0x0000058b, 0xf0f5da53, 0x26e39eee, 0xfd7c57de},
+ {0x2456719b, 0x00000025, 0x00000503, 0x4296ac64, 0xd50e4c14, 0xd5fedd59},
+ {0xfae6d8f2, 0x00000000, 0x0000055d, 0x057fdf2e, 0x2a31391a, 0x1cc3b17b},
+ {0xcba828e3, 0x00000039, 0x000002ce, 0xe3f22351, 0x8f00877b, 0x270eed73},
+ {0x13d25952, 0x0000000a, 0x0000072d, 0x76d4b4cc, 0x5eb67ec3, 0x91ecbb11},
+ {0x0342be3f, 0x00000015, 0x00000599, 0xec75d9f1, 0x9d4d2826, 0x05ed8d0c},
+ {0xeaa344e0, 0x00000014, 0x000004d8, 0x72a4c981, 0x2064ea06, 0x0b09ad5b},
+ {0xbbb52021, 0x0000003b, 0x00000272, 0x04af99fc, 0xaf042d35, 0xf8d511fb},
+ {0xb66384dc, 0x0000001d, 0x000007fc, 0xd7629116, 0x782bd801, 0x5ad832cc},
+ {0x616c01b6, 0x00000022, 0x000002c8, 0x5b1dab30, 0x783ce7d2, 0x1214d196},
+ {0xce2bdaad, 0x00000016, 0x0000062a, 0x932535c8, 0x3f02926d, 0x5747218a},
+ {0x00fe84d7, 0x00000005, 0x00000205, 0x850e50aa, 0x753d649c, 0xde8f14de},
+ {0xbebdcb4c, 0x00000006, 0x0000055d, 0xbeaa37a2, 0x2d8c9eba, 0x3563b7b9},
+ {0xd8b1a02a, 0x00000010, 0x00000387, 0x5017d2fc, 0x503541a5, 0x071475d0},
+ {0x3b96cad2, 0x00000036, 0x00000347, 0x1d2372ae, 0x926cd90b, 0x54c79d60},
+ {0xc94c1ed7, 0x00000005, 0x0000038b, 0x9e9fdb22, 0x144a9178, 0x4c53eee6},
+ {0x1aad454e, 0x00000025, 0x000002b2, 0xc3f6315c, 0x5c7a35b3, 0x10137a3c},
+ {0xa4fec9a6, 0x00000000, 0x000006d6, 0x90be5080, 0xa4107605, 0xaa9d6c73},
+ {0x1bbe71e2, 0x0000001f, 0x000002fd, 0x4e504c3b, 0x284ccaf1, 0xb63d23e7},
+ {0x4201c7e4, 0x00000002, 0x000002b7, 0x7822e3f9, 0x0cc912a9, 0x7f53e9cf},
+ {0x23fddc96, 0x00000003, 0x00000627, 0x8a385125, 0x07767e78, 0x13c1cd83},
+ {0xd82ba25c, 0x00000016, 0x0000063e, 0x98e4148a, 0x283330c9, 0x49ff5867},
+ {0x786f2032, 0x0000002d, 0x0000060f, 0xf201600a, 0xf561bfcd, 0x8467f211},
+ {0xfebe4e1f, 0x0000002a, 0x000004f2, 0x95e51961, 0xfd80dcab, 0x3f9683b2},
+ {0x1a6e0a39, 0x00000008, 0x00000672, 0x8af6c2a5, 0x78dd84cb, 0x76a3f874},
+ {0x56000ab8, 0x0000000e, 0x000000e5, 0x36bacb8f, 0x22ee1f77, 0x863b702f},
+ {0x4717fe0c, 0x00000000, 0x000006ec, 0x8439f342, 0x5c8e03da, 0xdc6c58ff},
+ {0xd5d5d68e, 0x0000003c, 0x000003a3, 0x46fff083, 0x177d1b39, 0x0622cc95},
+ {0xc25dd6c6, 0x00000024, 0x000006c0, 0x5ceb8eb4, 0x892b0d16, 0xe85605cd},
+ {0xe9b11300, 0x00000023, 0x00000683, 0x07a5d59a, 0x6c6a3208, 0x31da5f06},
+ {0x95cd285e, 0x00000001, 0x00000047, 0x7b3a4368, 0x0202c07e, 0xa1f2e784},
+ {0xd9245a25, 0x0000001e, 0x000003a6, 0xd33c1841, 0x1936c0d5, 0xb07cc616},
+ {0x103279db, 0x00000006, 0x0000039b, 0xca09b8a0, 0x77d62892, 0xbf943b6c},
+ {0x1cba3172, 0x00000027, 0x000001c8, 0xcb377194, 0xebe682db, 0x2c01af1c},
+ {0x8f613739, 0x0000000c, 0x000001df, 0xb4b0bc87, 0x7710bd43, 0x0fe5f56d},
+ {0x1c6aa90d, 0x0000001b, 0x0000053c, 0x70559245, 0xda7894ac, 0xf8943b2d},
+ {0xaabe5b93, 0x0000003d, 0x00000715, 0xcdbf42fa, 0x0c3b99e7, 0xe4d89272},
+ {0xf15dd038, 0x00000006, 0x000006db, 0x6e104aea, 0x8d5967f2, 0x7c2f6bbb},
+ {0x584dd49c, 0x00000020, 0x000007bc, 0x36b6cfd6, 0xad4e23b2, 0xabbf388b},
+ {0x5d8c9506, 0x00000020, 0x00000470, 0x4c62378e, 0x31d92640, 0x1dca1f4e},
+ {0xb80d17b0, 0x00000032, 0x00000346, 0x22a5bb88, 0x9a7ec89f, 0x5c170e23},
+ {0xdaf0592e, 0x00000023, 0x000007b0, 0x3cab3f99, 0x9b1fdd99, 0xc0e9d672},
+ {0x4793cc85, 0x0000000d, 0x00000706, 0xe82e04f6, 0xed3db6b7, 0xc18bdc86},
+ {0x82ebf64e, 0x00000009, 0x000007c3, 0x69d590a9, 0x9efa8499, 0xa874fcdd},
+ {0xb18a0319, 0x00000026, 0x000007db, 0x1cf98dcc, 0x8fa9ad6a, 0x9dc0bb48},
};
#include <linux/time.h>
@@ -1050,6 +1032,41 @@ static int __init crc32c_test(void)
return 0;
}
+static int __init crc32c_combine_test(void)
+{
+ int i, j;
+ int errors = 0, runs = 0;
+
+ for (i = 0; i < 10; i++) {
+ u32 crc_full;
+
+ crc_full = __crc32c_le(test[i].crc, test_buf + test[i].start,
+ test[i].length);
+ for (j = 0; j <= test[i].length; ++j) {
+ u32 crc1, crc2;
+ u32 len1 = j, len2 = test[i].length - j;
+
+ crc1 = __crc32c_le(test[i].crc, test_buf +
+ test[i].start, len1);
+ crc2 = __crc32c_le(0, test_buf + test[i].start +
+ len1, len2);
+
+ if (!(crc_full == __crc32c_le_combine(crc1, crc2, len2) &&
+ crc_full == test[i].crc32c_le))
+ errors++;
+ runs++;
+ cond_resched();
+ }
+ }
+
+ if (errors)
+ pr_warn("crc32c_combine: %d/%d self tests failed\n", errors, runs);
+ else
+ pr_info("crc32c_combine: %d self tests passed\n", runs);
+
+ return 0;
+}
+
static int __init crc32_test(void)
{
int i;
@@ -1109,10 +1126,49 @@ static int __init crc32_test(void)
return 0;
}
+static int __init crc32_combine_test(void)
+{
+ int i, j;
+ int errors = 0, runs = 0;
+
+ for (i = 0; i < 10; i++) {
+ u32 crc_full;
+
+ crc_full = crc32_le(test[i].crc, test_buf + test[i].start,
+ test[i].length);
+ for (j = 0; j <= test[i].length; ++j) {
+ u32 crc1, crc2;
+ u32 len1 = j, len2 = test[i].length - j;
+
+ crc1 = crc32_le(test[i].crc, test_buf +
+ test[i].start, len1);
+ crc2 = crc32_le(0, test_buf + test[i].start +
+ len1, len2);
+
+ if (!(crc_full == crc32_le_combine(crc1, crc2, len2) &&
+ crc_full == test[i].crc_le))
+ errors++;
+ runs++;
+ cond_resched();
+ }
+ }
+
+ if (errors)
+ pr_warn("crc32_combine: %d/%d self tests failed\n", errors, runs);
+ else
+ pr_info("crc32_combine: %d self tests passed\n", runs);
+
+ return 0;
+}
+
static int __init crc32test_init(void)
{
crc32_test();
crc32c_test();
+
+ crc32_combine_test();
+ crc32c_combine_test();
+
return 0;
}
diff --git a/lib/random32.c b/lib/random32.c
index 52280d5526be..82da4f4c3489 100644
--- a/lib/random32.c
+++ b/lib/random32.c
@@ -2,19 +2,19 @@
This is a maximally equidistributed combined Tausworthe generator
based on code from GNU Scientific Library 1.5 (30 Jun 2004)
- x_n = (s1_n ^ s2_n ^ s3_n)
+ lfsr113 version:
- s1_{n+1} = (((s1_n & 4294967294) <<12) ^ (((s1_n <<13) ^ s1_n) >>19))
- s2_{n+1} = (((s2_n & 4294967288) << 4) ^ (((s2_n << 2) ^ s2_n) >>25))
- s3_{n+1} = (((s3_n & 4294967280) <<17) ^ (((s3_n << 3) ^ s3_n) >>11))
+ x_n = (s1_n ^ s2_n ^ s3_n ^ s4_n)
- The period of this generator is about 2^88.
+ s1_{n+1} = (((s1_n & 4294967294) << 18) ^ (((s1_n << 6) ^ s1_n) >> 13))
+ s2_{n+1} = (((s2_n & 4294967288) << 2) ^ (((s2_n << 2) ^ s2_n) >> 27))
+ s3_{n+1} = (((s3_n & 4294967280) << 7) ^ (((s3_n << 13) ^ s3_n) >> 21))
+ s4_{n+1} = (((s4_n & 4294967168) << 13) ^ (((s4_n << 3) ^ s4_n) >> 12))
- From: P. L'Ecuyer, "Maximally Equidistributed Combined Tausworthe
- Generators", Mathematics of Computation, 65, 213 (1996), 203--213.
-
- This is available on the net from L'Ecuyer's home page,
+ The period of this generator is about 2^113 (see erratum paper).
+ From: P. L'Ecuyer, "Maximally Equidistributed Combined Tausworthe
+ Generators", Mathematics of Computation, 65, 213 (1996), 203--213:
http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme.ps
ftp://ftp.iro.umontreal.ca/pub/simulation/lecuyer/papers/tausme.ps
@@ -29,7 +29,7 @@
that paper.)
This affects the seeding procedure by imposing the requirement
- s1 > 1, s2 > 7, s3 > 15.
+ s1 > 1, s2 > 7, s3 > 15, s4 > 127.
*/
@@ -38,6 +38,11 @@
#include <linux/export.h>
#include <linux/jiffies.h>
#include <linux/random.h>
+#include <linux/sched.h>
+
+#ifdef CONFIG_RANDOM32_SELFTEST
+static void __init prandom_state_selftest(void);
+#endif
static DEFINE_PER_CPU(struct rnd_state, net_rand_state);
@@ -52,11 +57,12 @@ u32 prandom_u32_state(struct rnd_state *state)
{
#define TAUSWORTHE(s,a,b,c,d) ((s&c)<<d) ^ (((s <<a) ^ s)>>b)
- state->s1 = TAUSWORTHE(state->s1, 13, 19, 4294967294UL, 12);
- state->s2 = TAUSWORTHE(state->s2, 2, 25, 4294967288UL, 4);
- state->s3 = TAUSWORTHE(state->s3, 3, 11, 4294967280UL, 17);
+ state->s1 = TAUSWORTHE(state->s1, 6U, 13U, 4294967294U, 18U);
+ state->s2 = TAUSWORTHE(state->s2, 2U, 27U, 4294967288U, 2U);
+ state->s3 = TAUSWORTHE(state->s3, 13U, 21U, 4294967280U, 7U);
+ state->s4 = TAUSWORTHE(state->s4, 3U, 12U, 4294967168U, 13U);
- return (state->s1 ^ state->s2 ^ state->s3);
+ return (state->s1 ^ state->s2 ^ state->s3 ^ state->s4);
}
EXPORT_SYMBOL(prandom_u32_state);
@@ -126,6 +132,38 @@ void prandom_bytes(void *buf, int bytes)
}
EXPORT_SYMBOL(prandom_bytes);
+static void prandom_warmup(struct rnd_state *state)
+{
+ /* Calling RNG ten times to satify recurrence condition */
+ prandom_u32_state(state);
+ prandom_u32_state(state);
+ prandom_u32_state(state);
+ prandom_u32_state(state);
+ prandom_u32_state(state);
+ prandom_u32_state(state);
+ prandom_u32_state(state);
+ prandom_u32_state(state);
+ prandom_u32_state(state);
+ prandom_u32_state(state);
+}
+
+static void prandom_seed_very_weak(struct rnd_state *state, u32 seed)
+{
+ /* Note: This sort of seeding is ONLY used in test cases and
+ * during boot at the time from core_initcall until late_initcall
+ * as we don't have a stronger entropy source available yet.
+ * After late_initcall, we reseed entire state, we have to (!),
+ * otherwise an attacker just needs to search 32 bit space to
+ * probe for our internal 128 bit state if he knows a couple
+ * of prandom32 outputs!
+ */
+#define LCG(x) ((x) * 69069U) /* super-duper LCG */
+ state->s1 = __seed(LCG(seed), 2U);
+ state->s2 = __seed(LCG(state->s1), 8U);
+ state->s3 = __seed(LCG(state->s2), 16U);
+ state->s4 = __seed(LCG(state->s3), 128U);
+}
+
/**
* prandom_seed - add entropy to pseudo random number generator
* @seed: seed value
@@ -141,7 +179,9 @@ void prandom_seed(u32 entropy)
*/
for_each_possible_cpu (i) {
struct rnd_state *state = &per_cpu(net_rand_state, i);
- state->s1 = __seed(state->s1 ^ entropy, 1);
+
+ state->s1 = __seed(state->s1 ^ entropy, 2U);
+ prandom_warmup(state);
}
}
EXPORT_SYMBOL(prandom_seed);
@@ -154,46 +194,245 @@ static int __init prandom_init(void)
{
int i;
+#ifdef CONFIG_RANDOM32_SELFTEST
+ prandom_state_selftest();
+#endif
+
for_each_possible_cpu(i) {
struct rnd_state *state = &per_cpu(net_rand_state,i);
-#define LCG(x) ((x) * 69069) /* super-duper LCG */
- state->s1 = __seed(LCG(i + jiffies), 1);
- state->s2 = __seed(LCG(state->s1), 7);
- state->s3 = __seed(LCG(state->s2), 15);
-
- /* "warm it up" */
- prandom_u32_state(state);
- prandom_u32_state(state);
- prandom_u32_state(state);
- prandom_u32_state(state);
- prandom_u32_state(state);
- prandom_u32_state(state);
+ prandom_seed_very_weak(state, (i + jiffies) ^ random_get_entropy());
+ prandom_warmup(state);
}
return 0;
}
core_initcall(prandom_init);
+static void __prandom_timer(unsigned long dontcare);
+static DEFINE_TIMER(seed_timer, __prandom_timer, 0, 0);
+
+static void __prandom_timer(unsigned long dontcare)
+{
+ u32 entropy;
+
+ get_random_bytes(&entropy, sizeof(entropy));
+ prandom_seed(entropy);
+ /* reseed every ~60 seconds, in [40 .. 80) interval with slack */
+ seed_timer.expires = jiffies + (40 * HZ + (prandom_u32() % (40 * HZ)));
+ add_timer(&seed_timer);
+}
+
+static void prandom_start_seed_timer(void)
+{
+ set_timer_slack(&seed_timer, HZ);
+ seed_timer.expires = jiffies + 40 * HZ;
+ add_timer(&seed_timer);
+}
+
/*
* Generate better values after random number generator
* is fully initialized.
*/
-static int __init prandom_reseed(void)
+static void __prandom_reseed(bool late)
{
int i;
+ unsigned long flags;
+ static bool latch = false;
+ static DEFINE_SPINLOCK(lock);
+
+ /* only allow initial seeding (late == false) once */
+ spin_lock_irqsave(&lock, flags);
+ if (latch && !late)
+ goto out;
+ latch = true;
for_each_possible_cpu(i) {
struct rnd_state *state = &per_cpu(net_rand_state,i);
- u32 seeds[3];
+ u32 seeds[4];
get_random_bytes(&seeds, sizeof(seeds));
- state->s1 = __seed(seeds[0], 1);
- state->s2 = __seed(seeds[1], 7);
- state->s3 = __seed(seeds[2], 15);
+ state->s1 = __seed(seeds[0], 2U);
+ state->s2 = __seed(seeds[1], 8U);
+ state->s3 = __seed(seeds[2], 16U);
+ state->s4 = __seed(seeds[3], 128U);
- /* mix it in */
- prandom_u32_state(state);
+ prandom_warmup(state);
}
+out:
+ spin_unlock_irqrestore(&lock, flags);
+}
+
+void prandom_reseed_late(void)
+{
+ __prandom_reseed(true);
+}
+
+static int __init prandom_reseed(void)
+{
+ __prandom_reseed(false);
+ prandom_start_seed_timer();
return 0;
}
late_initcall(prandom_reseed);
+
+#ifdef CONFIG_RANDOM32_SELFTEST
+static struct prandom_test1 {
+ u32 seed;
+ u32 result;
+} test1[] = {
+ { 1U, 3484351685U },
+ { 2U, 2623130059U },
+ { 3U, 3125133893U },
+ { 4U, 984847254U },
+};
+
+static struct prandom_test2 {
+ u32 seed;
+ u32 iteration;
+ u32 result;
+} test2[] = {
+ /* Test cases against taus113 from GSL library. */
+ { 931557656U, 959U, 2975593782U },
+ { 1339693295U, 876U, 3887776532U },
+ { 1545556285U, 961U, 1615538833U },
+ { 601730776U, 723U, 1776162651U },
+ { 1027516047U, 687U, 511983079U },
+ { 416526298U, 700U, 916156552U },
+ { 1395522032U, 652U, 2222063676U },
+ { 366221443U, 617U, 2992857763U },
+ { 1539836965U, 714U, 3783265725U },
+ { 556206671U, 994U, 799626459U },
+ { 684907218U, 799U, 367789491U },
+ { 2121230701U, 931U, 2115467001U },
+ { 1668516451U, 644U, 3620590685U },
+ { 768046066U, 883U, 2034077390U },
+ { 1989159136U, 833U, 1195767305U },
+ { 536585145U, 996U, 3577259204U },
+ { 1008129373U, 642U, 1478080776U },
+ { 1740775604U, 939U, 1264980372U },
+ { 1967883163U, 508U, 10734624U },
+ { 1923019697U, 730U, 3821419629U },
+ { 442079932U, 560U, 3440032343U },
+ { 1961302714U, 845U, 841962572U },
+ { 2030205964U, 962U, 1325144227U },
+ { 1160407529U, 507U, 240940858U },
+ { 635482502U, 779U, 4200489746U },
+ { 1252788931U, 699U, 867195434U },
+ { 1961817131U, 719U, 668237657U },
+ { 1071468216U, 983U, 917876630U },
+ { 1281848367U, 932U, 1003100039U },
+ { 582537119U, 780U, 1127273778U },
+ { 1973672777U, 853U, 1071368872U },
+ { 1896756996U, 762U, 1127851055U },
+ { 847917054U, 500U, 1717499075U },
+ { 1240520510U, 951U, 2849576657U },
+ { 1685071682U, 567U, 1961810396U },
+ { 1516232129U, 557U, 3173877U },
+ { 1208118903U, 612U, 1613145022U },
+ { 1817269927U, 693U, 4279122573U },
+ { 1510091701U, 717U, 638191229U },
+ { 365916850U, 807U, 600424314U },
+ { 399324359U, 702U, 1803598116U },
+ { 1318480274U, 779U, 2074237022U },
+ { 697758115U, 840U, 1483639402U },
+ { 1696507773U, 840U, 577415447U },
+ { 2081979121U, 981U, 3041486449U },
+ { 955646687U, 742U, 3846494357U },
+ { 1250683506U, 749U, 836419859U },
+ { 595003102U, 534U, 366794109U },
+ { 47485338U, 558U, 3521120834U },
+ { 619433479U, 610U, 3991783875U },
+ { 704096520U, 518U, 4139493852U },
+ { 1712224984U, 606U, 2393312003U },
+ { 1318233152U, 922U, 3880361134U },
+ { 855572992U, 761U, 1472974787U },
+ { 64721421U, 703U, 683860550U },
+ { 678931758U, 840U, 380616043U },
+ { 692711973U, 778U, 1382361947U },
+ { 677703619U, 530U, 2826914161U },
+ { 92393223U, 586U, 1522128471U },
+ { 1222592920U, 743U, 3466726667U },
+ { 358288986U, 695U, 1091956998U },
+ { 1935056945U, 958U, 514864477U },
+ { 735675993U, 990U, 1294239989U },
+ { 1560089402U, 897U, 2238551287U },
+ { 70616361U, 829U, 22483098U },
+ { 368234700U, 731U, 2913875084U },
+ { 20221190U, 879U, 1564152970U },
+ { 539444654U, 682U, 1835141259U },
+ { 1314987297U, 840U, 1801114136U },
+ { 2019295544U, 645U, 3286438930U },
+ { 469023838U, 716U, 1637918202U },
+ { 1843754496U, 653U, 2562092152U },
+ { 400672036U, 809U, 4264212785U },
+ { 404722249U, 965U, 2704116999U },
+ { 600702209U, 758U, 584979986U },
+ { 519953954U, 667U, 2574436237U },
+ { 1658071126U, 694U, 2214569490U },
+ { 420480037U, 749U, 3430010866U },
+ { 690103647U, 969U, 3700758083U },
+ { 1029424799U, 937U, 3787746841U },
+ { 2012608669U, 506U, 3362628973U },
+ { 1535432887U, 998U, 42610943U },
+ { 1330635533U, 857U, 3040806504U },
+ { 1223800550U, 539U, 3954229517U },
+ { 1322411537U, 680U, 3223250324U },
+ { 1877847898U, 945U, 2915147143U },
+ { 1646356099U, 874U, 965988280U },
+ { 805687536U, 744U, 4032277920U },
+ { 1948093210U, 633U, 1346597684U },
+ { 392609744U, 783U, 1636083295U },
+ { 690241304U, 770U, 1201031298U },
+ { 1360302965U, 696U, 1665394461U },
+ { 1220090946U, 780U, 1316922812U },
+ { 447092251U, 500U, 3438743375U },
+ { 1613868791U, 592U, 828546883U },
+ { 523430951U, 548U, 2552392304U },
+ { 726692899U, 810U, 1656872867U },
+ { 1364340021U, 836U, 3710513486U },
+ { 1986257729U, 931U, 935013962U },
+ { 407983964U, 921U, 728767059U },
+};
+
+static void __init prandom_state_selftest(void)
+{
+ int i, j, errors = 0, runs = 0;
+ bool error = false;
+
+ for (i = 0; i < ARRAY_SIZE(test1); i++) {
+ struct rnd_state state;
+
+ prandom_seed_very_weak(&state, test1[i].seed);
+ prandom_warmup(&state);
+
+ if (test1[i].result != prandom_u32_state(&state))
+ error = true;
+ }
+
+ if (error)
+ pr_warn("prandom: seed boundary self test failed\n");
+ else
+ pr_info("prandom: seed boundary self test passed\n");
+
+ for (i = 0; i < ARRAY_SIZE(test2); i++) {
+ struct rnd_state state;
+
+ prandom_seed_very_weak(&state, test2[i].seed);
+ prandom_warmup(&state);
+
+ for (j = 0; j < test2[i].iteration - 1; j++)
+ prandom_u32_state(&state);
+
+ if (test2[i].result != prandom_u32_state(&state))
+ errors++;
+
+ runs++;
+ cond_resched();
+ }
+
+ if (errors)
+ pr_warn("prandom: %d/%d self tests failed\n", errors, runs);
+ else
+ pr_info("prandom: %d self tests passed\n", runs);
+}
+#endif