jitterentropy: update to 3.2.0.
This commit is contained in:
Piraty
parent
89b8d839c0
commit
1ee7b6297a
2 changed files with 201 additions and 5 deletions
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@ -0,0 +1,196 @@
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src: upstream
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reason: musl doesn't define these
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From c185bcf2f87606b60303dc40f8fdd444f105c4b6 Mon Sep 17 00:00:00 2001
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From: Stephan Mueller <smueller@chronox.de>
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Date: Wed, 1 Sep 2021 07:30:08 +0200
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Subject: [PATCH] JENT: add replacement if cache sysconf flags not available
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If the sysconf calls for getting the cache size are not available, read
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the data out of SysFS. The SysFS files for the CPU0 (which should exist
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in all cases) are accessed and read. The read operation attempts to read
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up to 3 cache entries, searching for data and unified caches. This
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covers the same functionality as the sysconf calls.
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If errors occur, the read cache sizes are zero which is appropriately
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handled by the Jitter RNG code base.
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Reported-by: stoickish
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Signed-off-by: Stephan Mueller <smueller@chronox.de>
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---
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jitterentropy-base-user.h | 135 +++++++++++++++++++++++++++++++++-----
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1 file changed, 119 insertions(+), 16 deletions(-)
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diff --git a/jitterentropy-base-user.h b/jitterentropy-base-user.h
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index 7c23c74..c2ddb5e 100644
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--- a/jitterentropy-base-user.h
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+++ b/jitterentropy-base-user.h
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@@ -55,8 +55,10 @@
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#undef OPENSSL
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#endif
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+#include <limits.h>
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#include <time.h>
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#include <stdint.h>
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+#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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@@ -228,21 +230,113 @@ static inline long jent_ncpu(void)
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#endif
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}
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+#ifdef __linux__
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+
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+# if defined(_SC_LEVEL1_DCACHE_SIZE) && \
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+ defined(_SC_LEVEL2_CACHE_SIZE) && \
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+ defined(_SC_LEVEL3_CACHE_SIZE)
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+
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+static inline void jent_get_cachesize(long *l1, long *l2, long *l3)
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+{
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+ *l1 = sysconf(_SC_LEVEL1_DCACHE_SIZE);
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+ *l2 = sysconf(_SC_LEVEL2_CACHE_SIZE);
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+ *l3 = sysconf(_SC_LEVEL3_CACHE_SIZE);
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+}
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+
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+# else
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+
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+static inline void jent_get_cachesize(long *l1, long *l2, long *l3)
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+{
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+#define JENT_SYSFS_CACHE_DIR "/sys/devices/system/cpu/cpu0/cache"
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+ long val;
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+ unsigned int i;
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+ char buf[10], file[50];
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+ int fd = 0;
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+
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+ /* Iterate over all caches */
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+ for (i = 0; i < 4; i++) {
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+ unsigned int shift = 0;
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+ char *ext;
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+
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+ /*
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+ * Check the cache type - we are only interested in Unified
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+ * and Data caches.
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+ */
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+ memset(buf, 0, sizeof(buf));
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+ snprintf(file, sizeof(file), "%s/index%u/type",
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+ JENT_SYSFS_CACHE_DIR, i);
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+ fd = open(file, O_RDONLY);
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+ if (fd < 0)
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+ continue;
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+ while (read(fd, buf, sizeof(buf)) < 0 && errno == EINTR);
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+ close(fd);
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+ buf[sizeof(buf) - 1] = '\0';
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+
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+ if (strncmp(buf, "Data", 4) && strncmp(buf, "Unified", 7))
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+ continue;
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+
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+ /* Get size of cache */
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+ memset(buf, 0, sizeof(buf));
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+ snprintf(file, sizeof(file), "%s/index%u/size",
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+ JENT_SYSFS_CACHE_DIR, i);
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+
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+ fd = open(file, O_RDONLY);
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+ if (fd < 0)
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+ continue;
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+ while (read(fd, buf, sizeof(buf)) < 0 && errno == EINTR);
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+ close(fd);
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+ buf[sizeof(buf) - 1] = '\0';
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+
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+ ext = strstr(buf, "K");
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+ if (ext) {
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+ shift = 10;
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+ ext = '\0';
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+ } else {
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+ ext = strstr(buf, "M");
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+ if (ext) {
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+ shift = 20;
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+ ext = '\0';
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+ }
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+ }
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+
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+ val = strtol(buf, NULL, 10);
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+ if (val == LONG_MAX)
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+ continue;
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+ val <<= shift;
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+
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+ if (!*l1)
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+ *l1 = val;
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+ else if (!*l2)
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+ *l2 = val;
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+ else {
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+ *l3 = val;
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+ break;
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+ }
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+ }
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+#undef JENT_SYSFS_CACHE_DIR
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+}
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+
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+# endif
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+
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static inline uint32_t jent_cache_size_roundup(void)
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{
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-#ifdef __linux__
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- long l1 = sysconf(_SC_LEVEL1_DCACHE_SIZE);
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- long l2 = sysconf(_SC_LEVEL2_CACHE_SIZE);
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- long l3 = sysconf(_SC_LEVEL3_CACHE_SIZE);
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- uint32_t cache_size = 0;
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-
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- /* Cache size reported by system */
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- if (l1 > 0)
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- cache_size += (uint32_t)l1;
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- if (l2 > 0)
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- cache_size += (uint32_t)l2;
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- if (l3 > 0)
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- cache_size += (uint32_t)l3;
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+ static int checked = 0;
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+ static uint32_t cache_size = 0;
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+
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+ if (!checked) {
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+ long l1 = 0, l2 = 0, l3 = 0;
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+
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+ jent_get_cachesize(&l1, &l2, &l3);
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+ checked = 1;
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+
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+ /* Cache size reported by system */
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+ if (l1 > 0)
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+ cache_size += (uint32_t)l1;
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+ if (l2 > 0)
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+ cache_size += (uint32_t)l2;
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+ if (l3 > 0)
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+ cache_size += (uint32_t)l3;
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+ }
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/* Force the output_size to be of the form (bounding_power_of_2 - 1). */
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cache_size |= (cache_size >> 1);
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@@ -254,15 +348,24 @@ static inline uint32_t jent_cache_size_roundup(void)
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if (cache_size == 0)
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return 0;
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- /* Make the output_size the smallest power of 2 strictly greater than cache_size. */
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+ /*
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+ * Make the output_size the smallest power of 2 strictly greater than
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+ * cache_size.
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+ */
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cache_size++;
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return cache_size;
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-#else
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+}
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+
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+#else /* __linux__ */
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+
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+static inline uint32_t jent_cache_size_roundup(void)
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+{
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return 0;
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-#endif
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}
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+#endif /* __linux__ */
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+
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static inline void jent_yield(void)
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{
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sched_yield();
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--
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2.32.0
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@ -1,6 +1,6 @@
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# Template file for 'jitterentropy'
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pkgname=jitterentropy
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version=3.0.2
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version=3.2.0
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revision=1
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wrksrc="${pkgname}-library-${version}"
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build_style=gnu-makefile
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@ -10,12 +10,12 @@ maintainer="Piraty <piraty1@inbox.ru>"
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license="BSD-3-Clause"
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homepage="https://www.chronox.de/jent.html"
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distfiles="https://github.com/smuellerDD/jitterentropy-library/archive/v${version}.tar.gz"
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checksum=5be868e343c25e24312f5e6894642ce1044994b99d6676430c760584a1b1613e
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checksum=0f052d4c854bd46467e6470d9a7d7d253dc051cf3ba2f65dcd0b7a209e1901f6
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post_install() {
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vlicense COPYING
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vlicense COPYING.bsd
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vlicense COPYING.gplv2
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vlicense LICENSE
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vlicense LICENSE.bsd
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vlicense LICENSE.gplv2
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}
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jitterentropy-devel_package() {
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