nfsd: embed nfsd4_current_state in nfsd4_compoundres

Remove the allocation of struct nfsd4_compound_state.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

2 files changed, 14 insertions, 35 deletions

diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index f156b85b4129..7bb8cb321dfe 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -809,29 +809,6 @@ static inline void nfsd4_increment_op_stats(u32 opnum)
                 nfsdstats.nfs4_opcount[opnum]++;
 }
 
-static void cstate_free(struct nfsd4_compound_state *cstate)
-{
-        if (cstate == NULL)
-                return;
-        fh_put(&cstate->current_fh);
-        fh_put(&cstate->save_fh);
-        BUG_ON(cstate->replay_owner);
-        kfree(cstate);
-}
-
-static struct nfsd4_compound_state *cstate_alloc(void)
-{
-        struct nfsd4_compound_state *cstate;
-
-        cstate = kmalloc(sizeof(struct nfsd4_compound_state), GFP_KERNEL);
-        if (cstate == NULL)
-                return NULL;
-        fh_init(&cstate->current_fh, NFS4_FHSIZE);
-        fh_init(&cstate->save_fh, NFS4_FHSIZE);
-        cstate->replay_owner = NULL;
-        return cstate;
-}
-
 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
                               void *);
 
@@ -859,12 +836,13 @@ nfsd4_proc_compound(struct svc_rqst *rqstp,
 {
         struct nfsd4_op *op;
         struct nfsd4_operation *opdesc;
-        struct nfsd4_compound_state *cstate = NULL;
+        struct nfsd4_compound_state *cstate = &resp->cstate;
         int             slack_bytes;
         __be32          status;
 
         resp->xbuf = &rqstp->rq_res;
-        resp->p = rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len;
+        resp->p = rqstp->rq_res.head[0].iov_base +
+                                                rqstp->rq_res.head[0].iov_len;
         resp->tagp = resp->p;
         /* reserve space for: taglen, tag, and opcnt */
         resp->p += 2 + XDR_QUADLEN(args->taglen);
@@ -873,6 +851,9 @@ nfsd4_proc_compound(struct svc_rqst *rqstp,
         resp->tag = args->tag;
         resp->opcnt = 0;
         resp->rqstp = rqstp;
+        resp->cstate.replay_owner = NULL;
+        fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
+        fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
 
         /*
          * According to RFC3010, this takes precedence over all other errors.
@@ -881,11 +862,6 @@ nfsd4_proc_compound(struct svc_rqst *rqstp,
         if (args->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
                 goto out;
 
-        status = nfserr_resource;
-        cstate = cstate_alloc();
-        if (cstate == NULL)
-                goto out;
-
         status = nfs_ok;
         while (!status && resp->opcnt < args->opcnt) {
                 op = &args->ops[resp->opcnt++];
@@ -958,7 +934,9 @@ encode_op:
                 nfsd4_increment_op_stats(op->opnum);
         }
 
-        cstate_free(cstate);
+        fh_put(&resp->cstate.current_fh);
+        fh_put(&resp->cstate.save_fh);
+        BUG_ON(resp->cstate.replay_owner);
 out:
         nfsd4_release_compoundargs(args);
         dprintk("nfsv4 compound returned %d\n", ntohl(status));
diff --git a/include/linux/nfsd/xdr4.h b/include/linux/nfsd/xdr4.h
index 27bd3e38ec5a..fd15ddc3359d 100644
--- a/include/linux/nfsd/xdr4.h
+++ b/include/linux/nfsd/xdr4.h
@@ -45,9 +45,9 @@
 #define XDR_LEN(n)                     (((n) + 3) & ~3)
 
 struct nfsd4_compound_state {
-        struct svc_fh current_fh;
-        struct svc_fh save_fh;
-        struct nfs4_stateowner *replay_owner;
+        struct svc_fh           current_fh;
+        struct svc_fh           save_fh;
+        struct nfs4_stateowner  *replay_owner;
 };
 
 struct nfsd4_change_info {
@@ -416,7 +416,8 @@ struct nfsd4_compoundres {
         u32                             taglen;
         char *                          tag;
         u32                             opcnt;
-        __be32 *                        tagp; /* where to encode tag and  opcount */
+        __be32 *                        tagp; /* tag, opcount encode location */
+        struct nfsd4_compound_state     cstate;
 };
 
 #define NFS4_SVC_XDRSIZE                sizeof(struct nfsd4_compoundargs)