From: Matt Mackall <mpm@selenic.com>
To: Andrew Morton <akpm@osdl.org>
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH 11/22] /dev/random: flag pools that need entropy reserve
Date: Thu, 25 Mar 2004 17:57:44 -0600 [thread overview]
Message-ID: <12.524465763@selenic.com> (raw)
In-Reply-To: <11.524465763@selenic.com>
/dev/random flag pools that need entropy reserve
Add flag for pools that need to leave an entropy reserve
tiny-mpm/drivers/char/random.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletion(-)
diff -puN drivers/char/random.c~reserved-in-struct drivers/char/random.c
--- tiny/drivers/char/random.c~reserved-in-struct 2004-03-20 13:38:27.000000000 -0600
+++ tiny-mpm/drivers/char/random.c 2004-03-20 13:38:27.000000000 -0600
@@ -497,6 +497,7 @@ struct entropy_store {
unsigned add_ptr;
int entropy_count;
int input_rotate;
+ int reserved;
struct poolinfo *poolinfo;
spinlock_t lock;
__u32 pool[0];
@@ -1277,13 +1278,14 @@ static inline void xfer_secondary_pool(s
if (r->entropy_count < nbytes * 8 &&
r->entropy_count < r->poolinfo->POOLBITS) {
int bytes = min_t(int, nbytes, TMP_BUF_SIZE);
+ int reserved = r->reserved ? random_read_wakeup_thresh/4 : 0;
DEBUG_ENT("going to reseed %s with %d bits "
"(%d of %d requested)\n", r->name,
bytes * 8, nbytes * 8, r->entropy_count);
bytes=extract_entropy(input_pool, tmp, bytes,
- random_read_wakeup_thresh / 8, 0,
+ random_read_wakeup_thresh/8, reserved,
EXTRACT_ENTROPY_LIMIT);
add_entropy_words(r, tmp, bytes);
credit_entropy_store(r, bytes*8);
_
next prev parent reply other threads:[~2004-03-26 1:11 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-25 23:57 [PATCH 0/22] /dev/random: Assorted fixes and cleanups Matt Mackall
2004-03-25 23:57 ` [PATCH 1/22] /dev/random: Simplify entropy debugging Matt Mackall
2004-03-25 23:57 ` [PATCH 2/22] /dev/random: Cleanup sleep logic Matt Mackall
2004-03-25 23:57 ` [PATCH 3/22] /dev/random: remove broken resizing sysctl Matt Mackall
2004-03-25 23:57 ` [PATCH 4/22] /dev/random: remove outdated RNDGETPOOL ioctl Matt Mackall
2004-03-25 23:57 ` [PATCH 5/22] /dev/random: pool struct cleanup and rename Matt Mackall
2004-03-25 23:57 ` [PATCH 6/22] /dev/random: simplify pool initialization Matt Mackall
2004-03-25 23:57 ` [PATCH 7/22] /dev/random: simplify reseed logic Matt Mackall
2004-03-25 23:57 ` [PATCH 8/22] /dev/random: BUG on premature random users Matt Mackall
2004-03-25 23:57 ` [PATCH 9/22] /dev/random: more robust catastrophic reseed logic Matt Mackall
2004-03-25 23:57 ` [PATCH 10/22] /dev/random: entropy reserve logic for starvation preve Matt Mackall
2004-03-25 23:57 ` Matt Mackall [this message]
2004-03-25 23:57 ` [PATCH 12/22] /dev/random: add pool for /dev/urandom to prevent starv Matt Mackall
2004-03-25 23:57 ` [PATCH 13/22] /dev/random: kill extract_timer_state Matt Mackall
2004-03-25 23:57 ` [PATCH 14/22] /dev/random: kill unused md5 copy Matt Mackall
2004-03-25 23:57 ` [PATCH 15/22] /dev/random: kill unrolled SHA code Matt Mackall
2004-03-25 23:57 ` [PATCH 16/22] /dev/random: kill 2.2 cruft Matt Mackall
2004-03-25 23:57 ` [PATCH 17/22] /dev/random: minor shrinkage Matt Mackall
2004-03-25 23:57 ` [PATCH 18/22] /dev/random: bitop cleanup Matt Mackall
2004-03-25 23:57 ` [PATCH 19/22] /dev/random: use sched_clock for timing data Matt Mackall
2004-03-25 23:57 ` [PATCH 20/22] /dev/random: cleanup rol bitop Matt Mackall
2004-03-25 23:57 ` [PATCH 21/22] /dev/random: kill batching of entropy mixing Matt Mackall
2004-03-25 23:57 ` [PATCH 22/22] /dev/random: update credits Matt Mackall
2004-03-27 13:52 ` [PATCH 21/22] /dev/random: kill batching of entropy mixing Jamie Lokier
2004-03-27 15:17 ` Matt Mackall
2004-03-26 1:43 ` [PATCH 15/22] /dev/random: kill unrolled SHA code Jeff Garzik
2004-03-26 3:59 ` Matt Mackall
2004-03-27 13:49 ` Jamie Lokier
2004-03-26 0:15 ` [PATCH 4/22] /dev/random: remove outdated RNDGETPOOL ioctl Andrew Morton
2004-03-26 0:15 ` [PATCH 3/22] /dev/random: remove broken resizing sysctl Andrew Morton
2004-03-26 3:53 ` Matt Mackall
2004-03-26 0:14 ` [PATCH 2/22] /dev/random: Cleanup sleep logic Andrew Morton
2004-03-26 3:49 ` Matt Mackall
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