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authorTommi Virtanen <tommi.virtanen@dreamhost.com>2011-03-28 14:59:38 -0700
committerSage Weil <sage@newdream.net>2011-03-29 12:11:24 -0700
commit4b2a58abd1e17c0ee53c8dded879e015917cca67 (patch)
tree585a02b8e3e36f7e6069d43000355e75aba097d3
parente2c3d29b4295c3eec18294bc34f0c99a7b9ae413 (diff)
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>
-rw-r--r--include/keys/ceph-type.h8
-rw-r--r--net/ceph/ceph_common.c21
-rw-r--r--net/ceph/crypto.c62
-rw-r--r--net/ceph/crypto.h2
4 files changed, 85 insertions, 8 deletions
diff --git a/include/keys/ceph-type.h b/include/keys/ceph-type.h
new file mode 100644
index 00000000000..f69c4ac197a
--- /dev/null
+++ b/include/keys/ceph-type.h
@@ -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
diff --git a/net/ceph/ceph_common.c b/net/ceph/ceph_common.c
index c92bc8d5059..132963abc26 100644
--- a/net/ceph/ceph_common.c
+++ b/net/ceph/ceph_common.c
@@ -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();
}
diff --git a/net/ceph/crypto.c b/net/ceph/crypto.c
index 75f0893fa11..5a8009c9e0c 100644
--- a/net/ceph/crypto.c
+++ b/net/ceph/crypto.c
@@ -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);
+}
diff --git a/net/ceph/crypto.h b/net/ceph/crypto.h
index 6cf6edc91ec..1919d1550d7 100644
--- a/net/ceph/crypto.h
+++ b/net/ceph/crypto.h
@@ -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);