1 files changed, 100 insertions, 0 deletions

diff --git a/crypto/proc.c b/crypto/proc.c
new file mode 100644
index 000000000..12fccb9c5
--- /dev/null
+++ b/crypto/proc.c
@@ -0,0 +1,100 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Scatterlist Cryptographic API.
+ *
+ * Procfs information.
+ *
+ * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
+ * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
+ */
+
+#include <linux/atomic.h>
+#include <linux/init.h>
+#include <linux/crypto.h>
+#include <linux/module.h>       /* for module_name() */
+#include <linux/rwsem.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include "internal.h"
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+        down_read(&crypto_alg_sem);
+        return seq_list_start(&crypto_alg_list, *pos);
+}
+
+static void *c_next(struct seq_file *m, void *p, loff_t *pos)
+{
+        return seq_list_next(p, &crypto_alg_list, pos);
+}
+
+static void c_stop(struct seq_file *m, void *p)
+{
+        up_read(&crypto_alg_sem);
+}
+
+static int c_show(struct seq_file *m, void *p)
+{
+        struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list);
+
+        seq_printf(m, "name         : %s\n", alg->cra_name);
+        seq_printf(m, "driver       : %s\n", alg->cra_driver_name);
+        seq_printf(m, "module       : %s\n", module_name(alg->cra_module));
+        seq_printf(m, "priority     : %d\n", alg->cra_priority);
+        seq_printf(m, "refcnt       : %u\n", refcount_read(&alg->cra_refcnt));
+        seq_printf(m, "selftest     : %s\n",
+                   (alg->cra_flags & CRYPTO_ALG_TESTED) ?
+                   "passed" : "unknown");
+        seq_printf(m, "internal     : %s\n",
+                   (alg->cra_flags & CRYPTO_ALG_INTERNAL) ?
+                   "yes" : "no");
+
+        if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
+                seq_printf(m, "type         : larval\n");
+                seq_printf(m, "flags        : 0x%x\n", alg->cra_flags);
+                goto out;
+        }
+
+        if (alg->cra_type && alg->cra_type->show) {
+                alg->cra_type->show(m, alg);
+                goto out;
+        }
+
+        switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) {
+        case CRYPTO_ALG_TYPE_CIPHER:
+                seq_printf(m, "type         : cipher\n");
+                seq_printf(m, "blocksize    : %u\n", alg->cra_blocksize);
+                seq_printf(m, "min keysize  : %u\n",
+                                        alg->cra_cipher.cia_min_keysize);
+                seq_printf(m, "max keysize  : %u\n",
+                                        alg->cra_cipher.cia_max_keysize);
+                break;
+        case CRYPTO_ALG_TYPE_COMPRESS:
+                seq_printf(m, "type         : compression\n");
+                break;
+        default:
+                seq_printf(m, "type         : unknown\n");
+                break;
+        }
+
+out:
+        seq_putc(m, '\n');
+        return 0;
+}
+
+static const struct seq_operations crypto_seq_ops = {
+        .start          = c_start,
+        .next           = c_next,
+        .stop           = c_stop,
+        .show           = c_show
+};
+
+void __init crypto_init_proc(void)
+{
+        proc_create_seq("crypto", 0, NULL, &crypto_seq_ops);
+}
+
+void __exit crypto_exit_proc(void)
+{
+        remove_proc_entry("crypto", NULL);
+}