libceph: Create a new key type "ceph".

This allows us to use existence of the key type as a feature test,
from userspace.

Signed-off-by: Tommi Virtanen <tommi.virtanen@dreamhost.com>
Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Tommi Virtanen 2011-03-28 14:59:38 -07:00 committed by Sage Weil
parent e2c3d29b42
commit 4b2a58abd1
4 changed files with 85 additions and 8 deletions

8
include/keys/ceph-type.h Normal file
View file

@ -0,0 +1,8 @@
#ifndef _KEYS_CEPH_TYPE_H
#define _KEYS_CEPH_TYPE_H
#include <linux/key.h>
extern struct key_type key_type_ceph;
#endif

View file

@ -6,7 +6,7 @@
#include <linux/inet.h>
#include <linux/in6.h>
#include <linux/key.h>
#include <keys/user-type.h>
#include <keys/ceph-type.h>
#include <linux/module.h>
#include <linux/mount.h>
#include <linux/parser.h>
@ -241,10 +241,9 @@ static int get_secret(struct ceph_crypto_key *dst, const char *name) {
struct key *ukey;
int key_err;
int err = 0;
struct user_key_payload *payload;
void *p;
struct ceph_crypto_key *ckey;
ukey = request_key(&key_type_user, name, NULL);
ukey = request_key(&key_type_ceph, name, NULL);
if (!ukey || IS_ERR(ukey)) {
/* request_key errors don't map nicely to mount(2)
errors; don't even try, but still printk */
@ -267,9 +266,8 @@ static int get_secret(struct ceph_crypto_key *dst, const char *name) {
goto out;
}
payload = ukey->payload.data;
p = payload->data;
err = ceph_crypto_key_decode(dst, &p, p + payload->datalen);
ckey = ukey->payload.data;
err = ceph_crypto_key_clone(dst, ckey);
if (err)
goto out_key;
/* pass through, err is 0 */
@ -583,10 +581,14 @@ static int __init init_ceph_lib(void)
if (ret < 0)
goto out;
ret = ceph_msgr_init();
ret = ceph_crypto_init();
if (ret < 0)
goto out_debugfs;
ret = ceph_msgr_init();
if (ret < 0)
goto out_crypto;
pr_info("loaded (mon/osd proto %d/%d, osdmap %d/%d %d/%d)\n",
CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL,
CEPH_OSDMAP_VERSION, CEPH_OSDMAP_VERSION_EXT,
@ -594,6 +596,8 @@ static int __init init_ceph_lib(void)
return 0;
out_crypto:
ceph_crypto_shutdown();
out_debugfs:
ceph_debugfs_cleanup();
out:
@ -604,6 +608,7 @@ static void __exit exit_ceph_lib(void)
{
dout("exit_ceph_lib\n");
ceph_msgr_exit();
ceph_crypto_shutdown();
ceph_debugfs_cleanup();
}

View file

@ -5,7 +5,9 @@
#include <linux/scatterlist.h>
#include <linux/slab.h>
#include <crypto/hash.h>
#include <linux/key-type.h>
#include <keys/ceph-type.h>
#include <linux/ceph/decode.h>
#include "crypto.h"
@ -421,3 +423,63 @@ int ceph_encrypt2(struct ceph_crypto_key *secret, void *dst, size_t *dst_len,
return -EINVAL;
}
}
int ceph_key_instantiate(struct key *key, const void *data, size_t datalen)
{
struct ceph_crypto_key *ckey;
int ret;
void *p;
ret = -EINVAL;
if (datalen <= 0 || datalen > 32767 || !data)
goto err;
ret = key_payload_reserve(key, datalen);
if (ret < 0)
goto err;
ret = -ENOMEM;
ckey = kmalloc(sizeof(*ckey), GFP_KERNEL);
if (!ckey)
goto err;
/* TODO ceph_crypto_key_decode should really take const input */
p = (void*)data;
ret = ceph_crypto_key_decode(ckey, &p, (char*)data+datalen);
if (ret < 0)
goto err_ckey;
key->payload.data = ckey;
return 0;
err_ckey:
kfree(ckey);
err:
return ret;
}
int ceph_key_match(const struct key *key, const void *description)
{
return strcmp(key->description, description) == 0;
}
void ceph_key_destroy(struct key *key) {
struct ceph_crypto_key *ckey = key->payload.data;
ceph_crypto_key_destroy(ckey);
}
struct key_type key_type_ceph = {
.name = "ceph",
.instantiate = ceph_key_instantiate,
.match = ceph_key_match,
.destroy = ceph_key_destroy,
};
int ceph_crypto_init(void) {
return register_key_type(&key_type_ceph);
}
void ceph_crypto_shutdown(void) {
unregister_key_type(&key_type_ceph);
}

View file

@ -42,6 +42,8 @@ extern int ceph_encrypt2(struct ceph_crypto_key *secret,
void *dst, size_t *dst_len,
const void *src1, size_t src1_len,
const void *src2, size_t src2_len);
extern int ceph_crypto_init(void);
extern void ceph_crypto_shutdown(void);
/* armor.c */
extern int ceph_armor(char *dst, const char *src, const char *end);