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staging/lustre: use 64-bit times for cfs_srand seed

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Several functions in Lustre call cfs_srand with do_gettimeofday
as the seed to get a pseudo-random number.
There is no bug here, but changing it to use ktime_get_ts64()
gets us closer to deprecating do_gettimeofday() and makes it slightly
more random.

Affected functions are:
lnet_shuffle_seed, init_lustre_lite and class_handle_init

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Arnd Bergmann 2015-09-27 16:45:14 -04:00 committed by Greg Kroah-Hartman
parent 473c4e0102
commit 1f4fc343c0
3 changed files with 9 additions and 9 deletions
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6
drivers/staging/lustre/lnet/lnet/router.c
View File

@ -237,7 +237,7 @@ static void lnet_shuffle_seed(void)
{
static int seeded;
int lnd_type, seed[2];
struct timeval tv;
struct timespec64 ts;
lnet_ni_t *ni;
struct list_head *tmp;
@ -256,8 +256,8 @@ static void lnet_shuffle_seed(void)
seed[0] ^= (LNET_NIDADDR(ni->ni_nid) | lnd_type);
}
do_gettimeofday(&tv);
cfs_srand(tv.tv_sec ^ seed[0], tv.tv_usec ^ seed[1]);
ktime_get_ts64(&ts);
cfs_srand(ts.tv_sec ^ seed[0], ts.tv_nsec ^ seed[1]);
seeded = 1;
}

6
drivers/staging/lustre/lustre/llite/super25.c
View File

@ -90,7 +90,7 @@ void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg));
static int __init init_lustre_lite(void)
{
lnet_process_id_t lnet_id;
struct timeval tv;
struct timespec64 ts;
int i, rc, seed[2];
CLASSERT(sizeof(LUSTRE_VOLATILE_HDR) == LUSTRE_VOLATILE_HDR_LEN + 1);
@ -152,8 +152,8 @@ static int __init init_lustre_lite(void)
seed[0] ^= LNET_NIDADDR(lnet_id.nid);
}
do_gettimeofday(&tv);
cfs_srand(tv.tv_sec ^ seed[0], tv.tv_usec ^ seed[1]);
ktime_get_ts64(&ts);
cfs_srand(ts.tv_sec ^ seed[0], ts.tv_nsec ^ seed[1]);
setup_timer(&ll_capa_timer, ll_capa_timer_callback, 0);
rc = ll_capa_thread_start();
if (rc != 0)

6
drivers/staging/lustre/lustre/obdclass/lustre_handles.c
View File

@ -193,7 +193,7 @@ EXPORT_SYMBOL(class_handle_free_cb);
int class_handle_init(void)
{
struct handle_bucket *bucket;
struct timeval tv;
struct timespec64 ts;
int seed[2];
LASSERT(handle_hash == NULL);
@ -212,8 +212,8 @@ int class_handle_init(void)
/** bug 21430: add randomness to the initial base */
cfs_get_random_bytes(seed, sizeof(seed));
do_gettimeofday(&tv);
cfs_srand(tv.tv_sec ^ seed[0], tv.tv_usec ^ seed[1]);
ktime_get_ts64(&ts);
cfs_srand(ts.tv_sec ^ seed[0], ts.tv_nsec ^ seed[1]);
cfs_get_random_bytes(&handle_base, sizeof(handle_base));
LASSERT(handle_base != 0ULL);