ceph: remove bad auth_x kmem_cache

It's useless, since our allocations are already a power of 2.  And it was
allocated per-instance (not globally), which caused a name collision when
we tried to mount a second file system with auth_x enabled.

Signed-off-by: Sage Weil <sage@newdream.net>

diff --git a/fs/ceph/auth_x.c b/fs/ceph/auth_x.c
index d9001a4..fee5a08 100644 (file)
--- a/fs/ceph/auth_x.c
+++ b/fs/ceph/auth_x.c
@@ -12,8 +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);
@@ -131,13 +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;
 
@@ -251,9 +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:
@@ -605,8 +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;
 }
@@ -641,26 +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;
@@ -670,10 +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;
 }