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Diffstat (limited to 'fs/ceph/auth_x.c')
-rw-r--r--fs/ceph/auth_x.c86
1 files changed, 49 insertions, 37 deletions
diff --git a/fs/ceph/auth_x.c b/fs/ceph/auth_x.c
index f0318427b6d..fee5a08da88 100644
--- a/fs/ceph/auth_x.c
+++ b/fs/ceph/auth_x.c
@@ -4,6 +4,7 @@
#include <linux/err.h>
#include <linux/module.h>
#include <linux/random.h>
+#include <linux/slab.h>
#include "auth_x.h"
#include "auth_x_protocol.h"
@@ -11,8 +12,6 @@
#include "auth.h"
#include "decode.h"
-struct kmem_cache *ceph_x_ticketbuf_cachep;
-
#define TEMP_TICKET_BUF_LEN 256
static void ceph_x_validate_tickets(struct ceph_auth_client *ac, int *pneed);
@@ -28,6 +27,12 @@ static int ceph_x_is_authenticated(struct ceph_auth_client *ac)
return (ac->want_keys & xi->have_keys) == ac->want_keys;
}
+static int ceph_x_encrypt_buflen(int ilen)
+{
+ return sizeof(struct ceph_x_encrypt_header) + ilen + 16 +
+ sizeof(u32);
+}
+
static int ceph_x_encrypt(struct ceph_crypto_key *secret,
void *ibuf, int ilen, void *obuf, size_t olen)
{
@@ -124,13 +129,12 @@ static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac,
char *ticket_buf;
u8 struct_v;
- dbuf = kmem_cache_alloc(ceph_x_ticketbuf_cachep, GFP_NOFS | GFP_ATOMIC);
+ dbuf = kmalloc(TEMP_TICKET_BUF_LEN, GFP_NOFS);
if (!dbuf)
return -ENOMEM;
ret = -ENOMEM;
- ticket_buf = kmem_cache_alloc(ceph_x_ticketbuf_cachep,
- GFP_NOFS | GFP_ATOMIC);
+ ticket_buf = kmalloc(TEMP_TICKET_BUF_LEN, GFP_NOFS);
if (!ticket_buf)
goto out_dbuf;
@@ -150,6 +154,11 @@ static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac,
struct timespec validity;
struct ceph_crypto_key old_key;
void *tp, *tpend;
+ struct ceph_timespec new_validity;
+ struct ceph_crypto_key new_session_key;
+ struct ceph_buffer *new_ticket_blob;
+ unsigned long new_expires, new_renew_after;
+ u64 new_secret_id;
ceph_decode_need(&p, end, sizeof(u32) + 1, bad);
@@ -182,16 +191,16 @@ static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac,
goto bad;
memcpy(&old_key, &th->session_key, sizeof(old_key));
- ret = ceph_crypto_key_decode(&th->session_key, &dp, dend);
+ ret = ceph_crypto_key_decode(&new_session_key, &dp, dend);
if (ret)
goto out;
- ceph_decode_copy(&dp, &th->validity, sizeof(th->validity));
- ceph_decode_timespec(&validity, &th->validity);
- th->expires = get_seconds() + validity.tv_sec;
- th->renew_after = th->expires - (validity.tv_sec / 4);
- dout(" expires=%lu renew_after=%lu\n", th->expires,
- th->renew_after);
+ ceph_decode_copy(&dp, &new_validity, sizeof(new_validity));
+ ceph_decode_timespec(&validity, &new_validity);
+ new_expires = get_seconds() + validity.tv_sec;
+ new_renew_after = new_expires - (validity.tv_sec / 4);
+ dout(" expires=%lu renew_after=%lu\n", new_expires,
+ new_renew_after);
/* ticket blob for service */
ceph_decode_8_safe(&p, end, is_enc, bad);
@@ -216,10 +225,21 @@ static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac,
dout(" ticket blob is %d bytes\n", dlen);
ceph_decode_need(&tp, tpend, 1 + sizeof(u64), bad);
struct_v = ceph_decode_8(&tp);
- th->secret_id = ceph_decode_64(&tp);
- ret = ceph_decode_buffer(&th->ticket_blob, &tp, tpend);
+ new_secret_id = ceph_decode_64(&tp);
+ ret = ceph_decode_buffer(&new_ticket_blob, &tp, tpend);
if (ret)
goto out;
+
+ /* all is well, update our ticket */
+ ceph_crypto_key_destroy(&th->session_key);
+ if (th->ticket_blob)
+ ceph_buffer_put(th->ticket_blob);
+ th->session_key = new_session_key;
+ th->ticket_blob = new_ticket_blob;
+ th->validity = new_validity;
+ th->secret_id = new_secret_id;
+ th->expires = new_expires;
+ th->renew_after = new_renew_after;
dout(" got ticket service %d (%s) secret_id %lld len %d\n",
type, ceph_entity_type_name(type), th->secret_id,
(int)th->ticket_blob->vec.iov_len);
@@ -228,9 +248,9 @@ static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac,
ret = 0;
out:
- kmem_cache_free(ceph_x_ticketbuf_cachep, ticket_buf);
+ kfree(ticket_buf);
out_dbuf:
- kmem_cache_free(ceph_x_ticketbuf_cachep, dbuf);
+ kfree(dbuf);
return ret;
bad:
@@ -242,7 +262,7 @@ static int ceph_x_build_authorizer(struct ceph_auth_client *ac,
struct ceph_x_ticket_handler *th,
struct ceph_x_authorizer *au)
{
- int len;
+ int maxlen;
struct ceph_x_authorize_a *msg_a;
struct ceph_x_authorize_b msg_b;
void *p, *end;
@@ -253,15 +273,15 @@ static int ceph_x_build_authorizer(struct ceph_auth_client *ac,
dout("build_authorizer for %s %p\n",
ceph_entity_type_name(th->service), au);
- len = sizeof(*msg_a) + sizeof(msg_b) + sizeof(u32) +
- ticket_blob_len + 16;
- dout(" need len %d\n", len);
- if (au->buf && au->buf->alloc_len < len) {
+ maxlen = sizeof(*msg_a) + sizeof(msg_b) +
+ ceph_x_encrypt_buflen(ticket_blob_len);
+ dout(" need len %d\n", maxlen);
+ if (au->buf && au->buf->alloc_len < maxlen) {
ceph_buffer_put(au->buf);
au->buf = NULL;
}
if (!au->buf) {
- au->buf = ceph_buffer_new(len, GFP_NOFS);
+ au->buf = ceph_buffer_new(maxlen, GFP_NOFS);
if (!au->buf)
return -ENOMEM;
}
@@ -296,6 +316,7 @@ static int ceph_x_build_authorizer(struct ceph_auth_client *ac,
au->buf->vec.iov_len = p - au->buf->vec.iov_base;
dout(" built authorizer nonce %llx len %d\n", au->nonce,
(int)au->buf->vec.iov_len);
+ BUG_ON(au->buf->vec.iov_len > maxlen);
return 0;
out_buf:
@@ -581,8 +602,6 @@ static void ceph_x_destroy(struct ceph_auth_client *ac)
remove_ticket_handler(ac, th);
}
- kmem_cache_destroy(ceph_x_ticketbuf_cachep);
-
kfree(ac->private);
ac->private = NULL;
}
@@ -617,26 +636,20 @@ int ceph_x_init(struct ceph_auth_client *ac)
int ret;
dout("ceph_x_init %p\n", ac);
+ ret = -ENOMEM;
xi = kzalloc(sizeof(*xi), GFP_NOFS);
if (!xi)
- return -ENOMEM;
+ goto out;
- ret = -ENOMEM;
- ceph_x_ticketbuf_cachep = kmem_cache_create("ceph_x_ticketbuf",
- TEMP_TICKET_BUF_LEN, 8,
- (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
- NULL);
- if (!ceph_x_ticketbuf_cachep)
- goto done_nomem;
ret = -EINVAL;
if (!ac->secret) {
pr_err("no secret set (for auth_x protocol)\n");
- goto done_nomem;
+ goto out_nomem;
}
ret = ceph_crypto_key_unarmor(&xi->secret, ac->secret);
if (ret)
- goto done_nomem;
+ goto out_nomem;
xi->starting = true;
xi->ticket_handlers = RB_ROOT;
@@ -646,10 +659,9 @@ int ceph_x_init(struct ceph_auth_client *ac)
ac->ops = &ceph_x_ops;
return 0;
-done_nomem:
+out_nomem:
kfree(xi);
- if (ceph_x_ticketbuf_cachep)
- kmem_cache_destroy(ceph_x_ticketbuf_cachep);
+out:
return ret;
}