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/linux/Documentation/admin-guide/
H A Dhw_random.rst2 Hardware random number generators
10 a Random Number Generator (RNG). The software has two parts:
23 /dev/random special files.
29 and read() system calls, you can read random data from
35 data before assuming it is truly random.
53 Hardware driver for Intel/AMD/VIA Random Number Generators (RNG)
61 The Firmware Hub integrates a Random Number Generator (RNG)
62 using thermal noise generated from inherently random quantum
63 mechanical properties of silicon. When not generating new random
96 Random Number Generator
[all …]
/linux/tools/testing/selftests/powerpc/stringloops/
H A Dmemcmp.c105 s1[j] = random(); in testcase()
107 rand_s1 += random() % MAX_OFFSET_DIFF_S1_S2; in testcase()
108 rand_s2 += random() % MAX_OFFSET_DIFF_S1_S2; in testcase()
112 change = random() % comp_size; in testcase()
113 rand_s2[change] = random() & 0xff; in testcase()
131 s1[j] = random(); in testcase()
133 rand_s1 += random() % MAX_OFFSET_DIFF_S1_S2; in testcase()
134 rand_s2 += random() % MAX_OFFSET_DIFF_S1_S2; in testcase()
139 change = random() % comp_size; in testcase()
140 s2[change] = random() & 0xff; in testcase()
/linux/arch/s390/boot/
H A Dkaslr.c57 unsigned long seed, random; in get_random() local
66 cpacf_trng(NULL, 0, (u8 *) &random, sizeof(random)); in get_random()
71 cpacf_prno(CPACF_PRNO_SHA512_DRNG_GEN, &prno, (u8 *) &random, in get_random()
72 sizeof(random), NULL, 0); in get_random()
83 random = seed; in get_random()
84 cpacf_kmc(CPACF_KMC_PRNG, prng.parm_block, (u8 *) &random, in get_random()
85 (u8 *) &random, sizeof(random)); in get_random()
90 *value = random % limit; in get_random()
/linux/tools/testing/selftests/bpf/verifier/
H A Dld_dw.c2 "ld_dw: xor semi-random 64 bit imms, test 1",
11 "ld_dw: xor semi-random 64 bit imms, test 2",
20 "ld_dw: xor semi-random 64 bit imms, test 3",
29 "ld_dw: xor semi-random 64 bit imms, test 4",
38 "ld_dw: xor semi-random 64 bit imms, test 5",
/linux/tools/testing/selftests/drivers/net/mlxsw/
H A Dsharedbuffer_configuration.py6 import random
16 objects, pool, tcbind and portpool. Provide an interface to get random
19 - random size
22 - random pool number
23 - random threshold
26 - random threshold
49 th = random.randint(3, 16)
67 return arr[random.randint(0, len(arr) - 1)]
223 # For each pool, set random size and static threshold type
296 # Bind each port and unicast TC (TCs < 8) to a random pool and a random
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/linux/drivers/firmware/efi/libstub/
H A Drandom.c29 * efi_get_random_bytes() - fill a buffer with random bytes
31 * @out: caller allocated buffer to receive the random bytes
34 * EFI_RNG_PROTOCOL or there are not enough random bytes available to fill
53 * efi_random_get_seed() - provide random seed as configuration table
55 * The EFI_RNG_PROTOCOL is used to read random bytes. These random bytes are
57 * for the initialization of its pseudo random number generator.
59 * If the EFI_RNG_PROTOCOL is not available or there are not enough random bytes
/linux/lib/
H A Duuid.c14 #include <linux/random.h>
25 * generate_random_uuid - generate a random UUID
28 * Random UUID interface
36 /* Set UUID version to 4 --- truly random generation */ in generate_random_uuid()
46 /* Set GUID version to 4 --- truly random generation */ in generate_random_guid()
63 /* version 4 : random generation */ in guid_gen()
71 /* version 4 : random generation */ in uuid_gen()
/linux/Documentation/admin-guide/device-mapper/
H A Ddm-zoned.rst11 device-side performance degradation due to excessive random writes on
53 zones of the device may be used also for buffering user random writes.
56 reused for buffering incoming random writes.
75 zone used to buffer random modification to the data zone.
95 chunk, resulting in native random write performance similar to a regular
177 0 <size> zoned <nr_zones> zones <nr_unmap_rnd>/<nr_rnd> random <nr_unmap_seq>/<nr_seq> sequential
180 of unmapped (ie free) random zones, <nr_rnd> the total number of zones,
185 percent free random zones. In order to start the reclaim process manually
193 will start the reclaim process and random zones will be moved to sequential
H A Ddm-flakey.rst71 During <down interval>, replace random byte in a read bio
72 with a random value. probability is an integer between
76 During <down interval>, replace random byte in a write bio
77 with a random value. probability is an integer between
/linux/net/netfilter/ipvs/
H A Dip_vs_twos.c12 #include <linux/random.h>
24 * - rweight1 = random number between [0,total_weight]
25 * - rweight2 = random number between [0,total_weight]
39 * The Power of Two Random Choices: A Survey of Techniques and Results
54 /* Generate a random weight between [0,sum of all weights) */ in ip_vs_twos_schedule()
70 /* Add 1 to total_weight so that the random weights are inclusive in ip_vs_twos_schedule()
/linux/tools/testing/selftests/net/netfilter/
H A Dnft_concat_range.sh1276 [ $((RANDOM%20)) -gt 0 ] && return
1293 [ $((RANDOM%20)) -gt 0 ] && return
1376 printf ". 172.%i.%i.%i " $((RANDOM%256)) $((RANDOM%256)) $((i%256))
1382 printf "%i . " $((RANDOM%256))
1391 local proto=$((RANDOM%256))
1405 printf "%i . 172.%i.%i.%i " $(((RANDOM%65534) + 1)) $((RANDOM%256)) $((RANDOM%256)) $((i%256))
1411 printf "172.%i.%i.%i . " $((RANDOM%256)) $((RANDOM%256)) $((i%256))
1419 printf "172.%i.%i.%i . %i" $((RANDOM%256)) $((RANDOM%256)) $((i%256)) $(((RANDOM%65534) + 1))
1426 printf "172.%i.%i.%i . %i . " $((RANDOM%256)) $((RANDOM%256)) $((i%256)) $(((RANDOM%65534) + 1))
1428 printf ". %i . 192.168.%i.%i" $((RANDOM%256)) $((RANDOM%256)) $((i%256))
[all …]
/linux/arch/powerpc/mm/nohash/
H A Dkaslr_booke.c286 unsigned long offset, random; in kaslr_choose_location() local
295 random = get_boot_seed(dt_ptr); in kaslr_choose_location()
299 random = rotate_xor(random, &seed, sizeof(seed)); in kaslr_choose_location()
306 random = rotate_xor(random, &seed, sizeof(seed)); in kaslr_choose_location()
336 * Only use the low 8 bits of the random seed in kaslr_choose_location()
338 index = random & 0xFF; in kaslr_choose_location()
342 offset = random % (SZ_64M - kernel_sz); in kaslr_choose_location()
349 * To see if we need to relocate the kernel to a random offset
/linux/tools/testing/selftests/net/
H A Dtest_ingress_egress_chaining.sh20 ns="ns$((RANDOM%899+100))"
21 veth1="veth1$((RANDOM%899+100))"
22 veth2="veth2$((RANDOM%899+100))"
23 peer1="peer1$((RANDOM%899+100))"
24 peer2="peer2$((RANDOM%899+100))"
H A Dtfo_passive.sh5 NSIM_SV_ID=$((256 + RANDOM % 256))
7 NSIM_CL_ID=$((512 + RANDOM % 256))
65 NSIM_SV_FD=$((256 + RANDOM % 256))
69 NSIM_CL_FD=$((256 + RANDOM % 256))
/linux/include/linux/
H A Dhw_random.h2 Hardware Random Number Generator
20 * struct hwrng - Hardware Random Number Generator driver
28 * Returns the number of lower random bytes in "data".
57 /** Register a new Hardware Random Number Generator driver. */
60 /** Unregister a Hardware Random Number Generator driver. */
H A Dkasan-tags.h7 #define KASAN_TAG_MAX 0xFD /* maximum value for random tags */
10 #define KASAN_TAG_MIN 0xF0 /* minimum value for random tags */
12 #define KASAN_TAG_MIN 0x00 /* minimum value for random tags */
/linux/arch/x86/tools/
H A Dinsn_sanity.c23 * Feed random binary to instruction decoder and ensure not to
33 static unsigned int seed; /* Random seed */
46 fprintf(stderr, "\t-s Give a random seed (and iteration number)\n"); in usage()
148 /* Fills buffer with random binary up to MAX_INSN_SIZE */ in generate_insn()
150 *(unsigned short *)(&insn_buff[i]) = random() & 0xffff; in generate_insn()
153 insn_buff[i++] = random() & 0xff; in generate_insn()
209 usage("Don't use input file (-i) with random seed (-s)"); in parse_args()
211 /* Initialize random seed */ in parse_args()
260 (input_file) ? "given" : "random", in main()
/linux/drivers/net/team/
H A Dteam_mode_random.c3 * drivers/net/team/team_mode_random.c - Random mode for team
42 .kind = "random",
63 MODULE_DESCRIPTION("Random mode for team");
64 MODULE_ALIAS_TEAM_MODE("random");
/linux/drivers/char/
H A Drandom.c35 #include <linux/random.h>
102 MODULE_PARM_DESC(ratelimit_disable, "Disable random ratelimit suppression");
106 * to supply cryptographically secure random numbers. This applies to: the
129 * cryptographically secure random numbers. This applies to: the /dev/urandom
173 printk_deferred(KERN_NOTICE "random: %s called from %pS with crng_init=%d\n", \
183 * RNG described at <https://blog.cr.yp.to/20170723-random.html>.
197 * These interfaces will return the requested number of random bytes
200 * functions may be higher performance for one-off random integers,
305 * half of the block containing 32 bytes of random data that may
335 * random data. It also returns up to 32 bytes on its own of random data
[all …]
/linux/drivers/s390/scsi/
H A Dzfcp_ccw.c62 * We want to scan ports here, with some random backoff and without in zfcp_ccw_activate()
64 * but with both random delay and rate limit. Nevertheless we get in zfcp_ccw_activate()
66 * an equivalent random time. in zfcp_ccw_activate()
67 * Let the port scan random delay elapse first. If recovery finishes in zfcp_ccw_activate()
70 * point in waiting a random delay on top of the time consumed by in zfcp_ccw_activate()
181 * We want to scan ports here, always, with some random delay and in zfcp_ccw_set_online()
186 * Since zfcp_ccw_activate() has waited the desired random time, in zfcp_ccw_set_online()
/linux/include/uapi/linux/
H A Drandom.h3 * include/linux/random.h
5 * Include file for the random number generator.
15 /* ioctl()'s for the random number generator */
52 * GRND_INSECURE Return non-cryptographic random bytes
/linux/Documentation/devicetree/bindings/rng/
H A Dmicrochip,pic32-rng.txt1 * Microchip PIC32 Random Number Generator
3 The PIC32 RNG provides a pseudo random number generator which can be seeded by
4 another true random number generator.
/linux/tools/testing/selftests/drivers/net/
H A Dnetcons_sysdata.sh7 # There are 3 different tests, every time sent using a random CPU.
198 # Send message from a random CPU
200 # Random CPU in the system
201 CPU=$((RANDOM % $(nproc)))
219 # Get a new random CPU
220 CPU=$((RANDOM % $(nproc)))
232 CPU=$((RANDOM % $(nproc)))
/linux/Documentation/crypto/
H A Dapi-rng.rst1 Random Number Algorithm Definitions
7 Crypto API Random Number API
11 :doc: Random number generator API
/linux/drivers/target/iscsi/
H A Discsi_target_nodeattrib.c183 pr_err("Requested Random DataIN PDU Offsets: %u not" in iscsit_na_random_datain_pdu_offsets()
189 pr_debug("Set Random DataIN PDU Offsets to %u for" in iscsit_na_random_datain_pdu_offsets()
203 pr_err("Requested Random DataIN Sequence Offsets: %u" in iscsit_na_random_datain_seq_offsets()
209 pr_debug("Set Random DataIN Sequence Offsets to %u for" in iscsit_na_random_datain_seq_offsets()
223 pr_err("Requested Random R2T Offsets: %u not" in iscsit_na_random_r2t_offsets()
229 pr_debug("Set Random R2T Offsets to %u for" in iscsit_na_random_r2t_offsets()

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