crypto: Add userspace report for pcompress type algorithms

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

2 files changed, 23 insertions, 0 deletions

diff --git a/crypto/pcompress.c b/crypto/pcompress.c
index f7c4a7d7412e..fefda78a6a2a 100644
--- a/crypto/pcompress.c
+++ b/crypto/pcompress.c
@@ -24,6 +24,8 @@
 #include <linux/module.h>
 #include <linux/seq_file.h>
 #include <linux/string.h>
+#include <linux/cryptouser.h>
+#include <net/netlink.h>
 
 #include <crypto/compress.h>
 #include <crypto/internal/compress.h>
@@ -46,6 +48,21 @@ static int crypto_pcomp_init_tfm(struct crypto_tfm *tfm)
         return 0;
 }
 
+static int crypto_pcomp_report(struct sk_buff *skb, struct crypto_alg *alg)
+{
+        struct crypto_report_comp rpcomp;
+
+        snprintf(rpcomp.type, CRYPTO_MAX_ALG_NAME, "%s", "pcomp");
+
+        NLA_PUT(skb, CRYPTOCFGA_REPORT_COMPRESS,
+                sizeof(struct crypto_report_comp), &rpcomp);
+
+        return 0;
+
+nla_put_failure:
+        return -EMSGSIZE;
+}
+
 static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg)
         __attribute__ ((unused));
 static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg)
@@ -60,6 +77,7 @@ static const struct crypto_type crypto_pcomp_type = {
 #ifdef CONFIG_PROC_FS
         .show           = crypto_pcomp_show,
 #endif
+        .report         = crypto_pcomp_report,
         .maskclear      = ~CRYPTO_ALG_TYPE_MASK,
         .maskset        = CRYPTO_ALG_TYPE_MASK,
         .type           = CRYPTO_ALG_TYPE_PCOMPRESS,
diff --git a/include/linux/cryptouser.h b/include/linux/cryptouser.h
index 48030c7dfb51..c8c1dfcb7cf2 100644
--- a/include/linux/cryptouser.h
+++ b/include/linux/cryptouser.h
@@ -40,6 +40,7 @@ enum crypto_attr_type_t {
         CRYPTOCFGA_REPORT_HASH,         /* struct crypto_report_hash */
         CRYPTOCFGA_REPORT_BLKCIPHER,    /* struct crypto_report_blkcipher */
         CRYPTOCFGA_REPORT_AEAD,         /* struct crypto_report_aead */
+        CRYPTOCFGA_REPORT_COMPRESS,     /* struct crypto_report_comp */
         __CRYPTOCFGA_MAX
 
 #define CRYPTOCFGA_MAX (__CRYPTOCFGA_MAX - 1)
@@ -81,3 +82,7 @@ struct crypto_report_aead {
         unsigned int maxauthsize;
         unsigned int ivsize;
 };
+
+struct crypto_report_comp {
+        char type[CRYPTO_MAX_NAME];
+};