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ceph: clean up statfs

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Avoid unnecessary msgpool.  Preallocate reply.  Fix use-after-free race.

Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Sage Weil
2010-03-24 21:43:33 -07:00
parent 6f46cb2935
commit 3143edd3a1
2 changed files with 98 additions and 58 deletions
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5
fs/ceph/mon_client.h
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@@ -2,6 +2,7 @@
#define _FS_CEPH_MON_CLIENT_H
#include <linux/completion.h>
#include <linux/kref.h>
#include <linux/rbtree.h>
#include "messenger.h"
@@ -44,13 +45,14 @@ struct ceph_mon_request {
* to the caller
*/
struct ceph_mon_statfs_request {
struct kref kref;
u64 tid;
struct rb_node node;
int result;
struct ceph_statfs *buf;
struct completion completion;
unsigned long last_attempt, delay; /* jiffies */
struct ceph_msg *request; /* original request */
struct ceph_msg *reply; /* and reply */
};
struct ceph_mon_client {
@@ -72,7 +74,6 @@ struct ceph_mon_client {
/* msg pools */
struct ceph_msgpool msgpool_subscribe_ack;
struct ceph_msgpool msgpool_statfs_reply;
struct ceph_msgpool msgpool_auth_reply;
/* pending statfs requests */