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limit how much we read from rt_cache etc

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Matt Johnston 2013-05-28 22:16:57 +08:00
parent a57947c513
commit ded40babb5
1 changed files with 7 additions and 6 deletions
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13
random.c
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@ -77,7 +77,7 @@ process_file(hash_state *hs, const char *filename,
while (len == 0 || readcount < len) while (len == 0 || readcount < len)
{ {
int readlen, wantread; int readlen, wantread;
unsigned char readbuf[2048]; unsigned char readbuf[4096];
if (!already_blocked) if (!already_blocked)
{ {
int ret; int ret;
@ -208,12 +208,13 @@ void seedrandom() {
process_file(&hs, "/proc/loadavg", 0, 0); process_file(&hs, "/proc/loadavg", 0, 0);
process_file(&hs, "/proc/sys/kernel/random/entropy_avail", 0, 0); process_file(&hs, "/proc/sys/kernel/random/entropy_avail", 0, 0);
/* Mostly network visible but useful in some situations */ /* Mostly network visible but useful in some situations.
process_file(&hs, "/proc/net/netstat", 0, 0); * Limit size to avoid slowdowns on systems with lots of routes */
process_file(&hs, "/proc/net/dev", 0, 0); process_file(&hs, "/proc/net/netstat", 4096, 0);
process_file(&hs, "/proc/net/tcp", 0, 0); process_file(&hs, "/proc/net/dev", 4096, 0);
process_file(&hs, "/proc/net/tcp", 4096, 0);
/* Also includes interface lo */ /* Also includes interface lo */
process_file(&hs, "/proc/net/rt_cache", 0, 0); process_file(&hs, "/proc/net/rt_cache", 4096, 0);
process_file(&hs, "/proc/vmstat", 0, 0); process_file(&hs, "/proc/vmstat", 0, 0);
#endif #endif