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crypto: rng - Count error stats differently

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Move all stat code specific to rng into the rng code.

While we're at it, change the stats so that bytes and counts
are always incremented even in case of error.  This allows the
reference counting to be removed as we can now increment the
counters prior to the operation.

After the operation we simply increase the error count if necessary.
This is safe as errors can only occur synchronously (or rather,
the existing code already ignored asynchronous errors which are
only visible to the callback function).

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
2023-02-16 18:35:23 +08:00
parent 1085680bbb
commit 9807e49b6a
5 changed files with 105 additions and 126 deletions
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33
crypto/crypto_user_stat.c
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@@ -6,15 +6,14 @@
*
*/
#include <linux/crypto.h>
#include <linux/cryptouser.h>
#include <linux/sched.h>
#include <crypto/algapi.h>
#include <crypto/internal/cryptouser.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <net/netlink.h>
#include <net/sock.h>
#include <crypto/internal/rng.h>
#include <crypto/internal/cryptouser.h>
#include "internal.h"
#define null_terminated(x) (strnlen(x, sizeof(x)) < sizeof(x))
@@ -47,22 +46,6 @@ static int crypto_report_comp(struct sk_buff *skb, struct crypto_alg *alg)
return nla_put(skb, CRYPTOCFGA_STAT_COMPRESS, sizeof(rcomp), &rcomp);
}
static int crypto_report_rng(struct sk_buff *skb, struct crypto_alg *alg)
{
struct crypto_stat_rng rrng;
memset(&rrng, 0, sizeof(rrng));
strscpy(rrng.type, "rng", sizeof(rrng.type));
rrng.stat_generate_cnt = atomic64_read(&alg->stats.rng.generate_cnt);
rrng.stat_generate_tlen = atomic64_read(&alg->stats.rng.generate_tlen);
rrng.stat_seed_cnt = atomic64_read(&alg->stats.rng.seed_cnt);
rrng.stat_err_cnt = atomic64_read(&alg->stats.rng.err_cnt);
return nla_put(skb, CRYPTOCFGA_STAT_RNG, sizeof(rrng), &rrng);
}
static int crypto_reportstat_one(struct crypto_alg *alg,
struct crypto_user_alg *ualg,
struct sk_buff *skb)
@@ -107,10 +90,6 @@ static int crypto_reportstat_one(struct crypto_alg *alg,
if (crypto_report_comp(skb, alg))
goto nla_put_failure;
break;
case CRYPTO_ALG_TYPE_RNG:
if (crypto_report_rng(skb, alg))
goto nla_put_failure;
break;
default:
pr_err("ERROR: Unhandled alg %d in %s\n",
alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL),