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authorCorentin Labbe <clabbe@baylibre.com>2018-09-19 13:10:54 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2018-09-28 07:46:25 +0300
commitcac5818c25d0423bda73e2b6997404ed0a7ed9e3 (patch)
tree3a443fa0e9a8e96799e2802552cd1f6435213569 /crypto/crypto_user_stat.c
parenta9cbfe4c784436368790f0c59674f99ba97ae21e (diff)
downloadlinux-cac5818c25d0423bda73e2b6997404ed0a7ed9e3.tar.xz
crypto: user - Implement a generic crypto statistics
This patch implement a generic way to get statistics about all crypto usages. Signed-off-by: Corentin Labbe <clabbe@baylibre.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/crypto_user_stat.c')
-rw-r--r--crypto/crypto_user_stat.c463
1 files changed, 463 insertions, 0 deletions
diff --git a/crypto/crypto_user_stat.c b/crypto/crypto_user_stat.c
new file mode 100644
index 000000000000..021ad06bbb62
--- /dev/null
+++ b/crypto/crypto_user_stat.c
@@ -0,0 +1,463 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Crypto user configuration API.
+ *
+ * Copyright (C) 2017-2018 Corentin Labbe <clabbe@baylibre.com>
+ *
+ */
+
+#include <linux/crypto.h>
+#include <linux/cryptouser.h>
+#include <linux/sched.h>
+#include <net/netlink.h>
+#include <crypto/internal/skcipher.h>
+#include <crypto/internal/rng.h>
+#include <crypto/akcipher.h>
+#include <crypto/kpp.h>
+#include <crypto/internal/cryptouser.h>
+
+#include "internal.h"
+
+#define null_terminated(x) (strnlen(x, sizeof(x)) < sizeof(x))
+
+static DEFINE_MUTEX(crypto_cfg_mutex);
+
+extern struct sock *crypto_nlsk;
+
+struct crypto_dump_info {
+ struct sk_buff *in_skb;
+ struct sk_buff *out_skb;
+ u32 nlmsg_seq;
+ u16 nlmsg_flags;
+};
+
+static int crypto_report_aead(struct sk_buff *skb, struct crypto_alg *alg)
+{
+ struct crypto_stat raead;
+ u64 v64;
+ u32 v32;
+
+ strncpy(raead.type, "aead", sizeof(raead.type));
+
+ v32 = atomic_read(&alg->encrypt_cnt);
+ raead.stat_encrypt_cnt = v32;
+ v64 = atomic64_read(&alg->encrypt_tlen);
+ raead.stat_encrypt_tlen = v64;
+ v32 = atomic_read(&alg->decrypt_cnt);
+ raead.stat_decrypt_cnt = v32;
+ v64 = atomic64_read(&alg->decrypt_tlen);
+ raead.stat_decrypt_tlen = v64;
+ v32 = atomic_read(&alg->aead_err_cnt);
+ raead.stat_aead_err_cnt = v32;
+
+ if (nla_put(skb, CRYPTOCFGA_STAT_AEAD,
+ sizeof(struct crypto_stat), &raead))
+ goto nla_put_failure;
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+static int crypto_report_cipher(struct sk_buff *skb, struct crypto_alg *alg)
+{
+ struct crypto_stat rcipher;
+ u64 v64;
+ u32 v32;
+
+ strlcpy(rcipher.type, "cipher", sizeof(rcipher.type));
+
+ v32 = atomic_read(&alg->encrypt_cnt);
+ rcipher.stat_encrypt_cnt = v32;
+ v64 = atomic64_read(&alg->encrypt_tlen);
+ rcipher.stat_encrypt_tlen = v64;
+ v32 = atomic_read(&alg->decrypt_cnt);
+ rcipher.stat_decrypt_cnt = v32;
+ v64 = atomic64_read(&alg->decrypt_tlen);
+ rcipher.stat_decrypt_tlen = v64;
+ v32 = atomic_read(&alg->cipher_err_cnt);
+ rcipher.stat_cipher_err_cnt = v32;
+
+ if (nla_put(skb, CRYPTOCFGA_STAT_CIPHER,
+ sizeof(struct crypto_stat), &rcipher))
+ goto nla_put_failure;
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+static int crypto_report_comp(struct sk_buff *skb, struct crypto_alg *alg)
+{
+ struct crypto_stat rcomp;
+ u64 v64;
+ u32 v32;
+
+ strlcpy(rcomp.type, "compression", sizeof(rcomp.type));
+ v32 = atomic_read(&alg->compress_cnt);
+ rcomp.stat_compress_cnt = v32;
+ v64 = atomic64_read(&alg->compress_tlen);
+ rcomp.stat_compress_tlen = v64;
+ v32 = atomic_read(&alg->decompress_cnt);
+ rcomp.stat_decompress_cnt = v32;
+ v64 = atomic64_read(&alg->decompress_tlen);
+ rcomp.stat_decompress_tlen = v64;
+ v32 = atomic_read(&alg->cipher_err_cnt);
+ rcomp.stat_compress_err_cnt = v32;
+
+ if (nla_put(skb, CRYPTOCFGA_STAT_COMPRESS,
+ sizeof(struct crypto_stat), &rcomp))
+ goto nla_put_failure;
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+static int crypto_report_acomp(struct sk_buff *skb, struct crypto_alg *alg)
+{
+ struct crypto_stat racomp;
+ u64 v64;
+ u32 v32;
+
+ strlcpy(racomp.type, "acomp", sizeof(racomp.type));
+ v32 = atomic_read(&alg->compress_cnt);
+ racomp.stat_compress_cnt = v32;
+ v64 = atomic64_read(&alg->compress_tlen);
+ racomp.stat_compress_tlen = v64;
+ v32 = atomic_read(&alg->decompress_cnt);
+ racomp.stat_decompress_cnt = v32;
+ v64 = atomic64_read(&alg->decompress_tlen);
+ racomp.stat_decompress_tlen = v64;
+ v32 = atomic_read(&alg->cipher_err_cnt);
+ racomp.stat_compress_err_cnt = v32;
+
+ if (nla_put(skb, CRYPTOCFGA_STAT_ACOMP,
+ sizeof(struct crypto_stat), &racomp))
+ goto nla_put_failure;
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+static int crypto_report_akcipher(struct sk_buff *skb, struct crypto_alg *alg)
+{
+ struct crypto_stat rakcipher;
+ u64 v64;
+ u32 v32;
+
+ strncpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
+ v32 = atomic_read(&alg->encrypt_cnt);
+ rakcipher.stat_encrypt_cnt = v32;
+ v64 = atomic64_read(&alg->encrypt_tlen);
+ rakcipher.stat_encrypt_tlen = v64;
+ v32 = atomic_read(&alg->decrypt_cnt);
+ rakcipher.stat_decrypt_cnt = v32;
+ v64 = atomic64_read(&alg->decrypt_tlen);
+ rakcipher.stat_decrypt_tlen = v64;
+ v32 = atomic_read(&alg->sign_cnt);
+ rakcipher.stat_sign_cnt = v32;
+ v32 = atomic_read(&alg->verify_cnt);
+ rakcipher.stat_verify_cnt = v32;
+ v32 = atomic_read(&alg->akcipher_err_cnt);
+ rakcipher.stat_akcipher_err_cnt = v32;
+
+ if (nla_put(skb, CRYPTOCFGA_STAT_AKCIPHER,
+ sizeof(struct crypto_stat), &rakcipher))
+ goto nla_put_failure;
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+static int crypto_report_kpp(struct sk_buff *skb, struct crypto_alg *alg)
+{
+ struct crypto_stat rkpp;
+ u32 v;
+
+ strlcpy(rkpp.type, "kpp", sizeof(rkpp.type));
+
+ v = atomic_read(&alg->setsecret_cnt);
+ rkpp.stat_setsecret_cnt = v;
+ v = atomic_read(&alg->generate_public_key_cnt);
+ rkpp.stat_generate_public_key_cnt = v;
+ v = atomic_read(&alg->compute_shared_secret_cnt);
+ rkpp.stat_compute_shared_secret_cnt = v;
+ v = atomic_read(&alg->kpp_err_cnt);
+ rkpp.stat_kpp_err_cnt = v;
+
+ if (nla_put(skb, CRYPTOCFGA_STAT_KPP,
+ sizeof(struct crypto_stat), &rkpp))
+ goto nla_put_failure;
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+static int crypto_report_ahash(struct sk_buff *skb, struct crypto_alg *alg)
+{
+ struct crypto_stat rhash;
+ u64 v64;
+ u32 v32;
+
+ strncpy(rhash.type, "ahash", sizeof(rhash.type));
+
+ v32 = atomic_read(&alg->hash_cnt);
+ rhash.stat_hash_cnt = v32;
+ v64 = atomic64_read(&alg->hash_tlen);
+ rhash.stat_hash_tlen = v64;
+ v32 = atomic_read(&alg->hash_err_cnt);
+ rhash.stat_hash_err_cnt = v32;
+
+ if (nla_put(skb, CRYPTOCFGA_STAT_HASH,
+ sizeof(struct crypto_stat), &rhash))
+ goto nla_put_failure;
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+static int crypto_report_shash(struct sk_buff *skb, struct crypto_alg *alg)
+{
+ struct crypto_stat rhash;
+ u64 v64;
+ u32 v32;
+
+ strncpy(rhash.type, "shash", sizeof(rhash.type));
+
+ v32 = atomic_read(&alg->hash_cnt);
+ rhash.stat_hash_cnt = v32;
+ v64 = atomic64_read(&alg->hash_tlen);
+ rhash.stat_hash_tlen = v64;
+ v32 = atomic_read(&alg->hash_err_cnt);
+ rhash.stat_hash_err_cnt = v32;
+
+ if (nla_put(skb, CRYPTOCFGA_STAT_HASH,
+ sizeof(struct crypto_stat), &rhash))
+ goto nla_put_failure;
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+static int crypto_report_rng(struct sk_buff *skb, struct crypto_alg *alg)
+{
+ struct crypto_stat rrng;
+ u64 v64;
+ u32 v32;
+
+ strncpy(rrng.type, "rng", sizeof(rrng.type));
+
+ v32 = atomic_read(&alg->generate_cnt);
+ rrng.stat_generate_cnt = v32;
+ v64 = atomic64_read(&alg->generate_tlen);
+ rrng.stat_generate_tlen = v64;
+ v32 = atomic_read(&alg->seed_cnt);
+ rrng.stat_seed_cnt = v32;
+ v32 = atomic_read(&alg->hash_err_cnt);
+ rrng.stat_rng_err_cnt = v32;
+
+ if (nla_put(skb, CRYPTOCFGA_STAT_RNG,
+ sizeof(struct crypto_stat), &rrng))
+ goto nla_put_failure;
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+static int crypto_reportstat_one(struct crypto_alg *alg,
+ struct crypto_user_alg *ualg,
+ struct sk_buff *skb)
+{
+ strlcpy(ualg->cru_name, alg->cra_name, sizeof(ualg->cru_name));
+ strlcpy(ualg->cru_driver_name, alg->cra_driver_name,
+ sizeof(ualg->cru_driver_name));
+ strlcpy(ualg->cru_module_name, module_name(alg->cra_module),
+ sizeof(ualg->cru_module_name));
+
+ ualg->cru_type = 0;
+ ualg->cru_mask = 0;
+ ualg->cru_flags = alg->cra_flags;
+ ualg->cru_refcnt = refcount_read(&alg->cra_refcnt);
+
+ if (nla_put_u32(skb, CRYPTOCFGA_PRIORITY_VAL, alg->cra_priority))
+ goto nla_put_failure;
+ if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
+ struct crypto_stat rl;
+
+ strlcpy(rl.type, "larval", sizeof(rl.type));
+ if (nla_put(skb, CRYPTOCFGA_STAT_LARVAL,
+ sizeof(struct crypto_stat), &rl))
+ goto nla_put_failure;
+ goto out;
+ }
+
+ switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) {
+ case CRYPTO_ALG_TYPE_AEAD:
+ if (crypto_report_aead(skb, alg))
+ goto nla_put_failure;
+ break;
+ case CRYPTO_ALG_TYPE_SKCIPHER:
+ if (crypto_report_cipher(skb, alg))
+ goto nla_put_failure;
+ break;
+ case CRYPTO_ALG_TYPE_BLKCIPHER:
+ if (crypto_report_cipher(skb, alg))
+ goto nla_put_failure;
+ break;
+ case CRYPTO_ALG_TYPE_CIPHER:
+ if (crypto_report_cipher(skb, alg))
+ goto nla_put_failure;
+ break;
+ case CRYPTO_ALG_TYPE_COMPRESS:
+ if (crypto_report_comp(skb, alg))
+ goto nla_put_failure;
+ break;
+ case CRYPTO_ALG_TYPE_ACOMPRESS:
+ if (crypto_report_acomp(skb, alg))
+ goto nla_put_failure;
+ break;
+ case CRYPTO_ALG_TYPE_SCOMPRESS:
+ if (crypto_report_acomp(skb, alg))
+ goto nla_put_failure;
+ break;
+ case CRYPTO_ALG_TYPE_AKCIPHER:
+ if (crypto_report_akcipher(skb, alg))
+ goto nla_put_failure;
+ break;
+ case CRYPTO_ALG_TYPE_KPP:
+ if (crypto_report_kpp(skb, alg))
+ goto nla_put_failure;
+ break;
+ case CRYPTO_ALG_TYPE_AHASH:
+ if (crypto_report_ahash(skb, alg))
+ goto nla_put_failure;
+ break;
+ case CRYPTO_ALG_TYPE_HASH:
+ if (crypto_report_shash(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),
+ __func__);
+ }
+
+out:
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+static int crypto_reportstat_alg(struct crypto_alg *alg,
+ struct crypto_dump_info *info)
+{
+ struct sk_buff *in_skb = info->in_skb;
+ struct sk_buff *skb = info->out_skb;
+ struct nlmsghdr *nlh;
+ struct crypto_user_alg *ualg;
+ int err = 0;
+
+ nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, info->nlmsg_seq,
+ CRYPTO_MSG_GETSTAT, sizeof(*ualg), info->nlmsg_flags);
+ if (!nlh) {
+ err = -EMSGSIZE;
+ goto out;
+ }
+
+ ualg = nlmsg_data(nlh);
+
+ err = crypto_reportstat_one(alg, ualg, skb);
+ if (err) {
+ nlmsg_cancel(skb, nlh);
+ goto out;
+ }
+
+ nlmsg_end(skb, nlh);
+
+out:
+ return err;
+}
+
+int crypto_reportstat(struct sk_buff *in_skb, struct nlmsghdr *in_nlh,
+ struct nlattr **attrs)
+{
+ struct crypto_user_alg *p = nlmsg_data(in_nlh);
+ struct crypto_alg *alg;
+ struct sk_buff *skb;
+ struct crypto_dump_info info;
+ int err;
+
+ if (!null_terminated(p->cru_name) || !null_terminated(p->cru_driver_name))
+ return -EINVAL;
+
+ alg = crypto_alg_match(p, 0);
+ if (!alg)
+ return -ENOENT;
+
+ err = -ENOMEM;
+ skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
+ if (!skb)
+ goto drop_alg;
+
+ info.in_skb = in_skb;
+ info.out_skb = skb;
+ info.nlmsg_seq = in_nlh->nlmsg_seq;
+ info.nlmsg_flags = 0;
+
+ err = crypto_reportstat_alg(alg, &info);
+
+drop_alg:
+ crypto_mod_put(alg);
+
+ if (err)
+ return err;
+
+ return nlmsg_unicast(crypto_nlsk, skb, NETLINK_CB(in_skb).portid);
+}
+
+int crypto_dump_reportstat(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct crypto_alg *alg;
+ struct crypto_dump_info info;
+ int err;
+
+ if (cb->args[0])
+ goto out;
+
+ cb->args[0] = 1;
+
+ info.in_skb = cb->skb;
+ info.out_skb = skb;
+ info.nlmsg_seq = cb->nlh->nlmsg_seq;
+ info.nlmsg_flags = NLM_F_MULTI;
+
+ list_for_each_entry(alg, &crypto_alg_list, cra_list) {
+ err = crypto_reportstat_alg(alg, &info);
+ if (err)
+ goto out_err;
+ }
+
+out:
+ return skb->len;
+out_err:
+ return err;
+}
+
+int crypto_dump_reportstat_done(struct netlink_callback *cb)
+{
+ return 0;
+}
+
+MODULE_LICENSE("GPL");