libceph: change how osd_op_reply message size is calculated

For a message pool message, preallocate a page, just like we do for
osd_op.  For a normal message, take ceph_object_id into account and
don't bother subtracting CEPH_OSD_SLAB_OPS ceph_osd_ops.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index d66dacc..75e27bd 100644 (file)
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -19,7 +19,6 @@
 #include <linux/ceph/auth.h>
 #include <linux/ceph/pagelist.h>
 
-#define OSD_OP_FRONT_LEN       4096
 #define OSD_OPREPLY_FRONT_LEN  512
 
 static struct kmem_cache       *ceph_osd_request_cache;
@@ -440,11 +439,8 @@ int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
 
        /* create reply message */
        msg_size = OSD_OPREPLY_FRONT_LEN;
-       if (req->r_num_ops > CEPH_OSD_SLAB_OPS) {
-               /* ceph_osd_op and rval */
-               msg_size += (req->r_num_ops - CEPH_OSD_SLAB_OPS) *
-                           (sizeof(struct ceph_osd_op) + 4);
-       }
+       msg_size += req->r_base_oid.name_len;
+       msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
 
        if (req->r_mempool)
                msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
@@ -2702,13 +2698,11 @@ int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
                goto out;
 
        err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
-                               OSD_OP_FRONT_LEN, 10, true,
-                               "osd_op");
+                               PAGE_SIZE, 10, true, "osd_op");
        if (err < 0)
                goto out_mempool;
        err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
-                               OSD_OPREPLY_FRONT_LEN, 10, true,
-                               "osd_op_reply");
+                               PAGE_SIZE, 10, true, "osd_op_reply");
        if (err < 0)
                goto out_msgpool;