NFSD: Update the NFSv3 ACCESS3res encoder to use struct xdr_stream

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c
index 7573986..9d6c989 100644 (file)
--- a/fs/nfsd/nfs3xdr.c
+++ b/fs/nfsd/nfs3xdr.c
@@ -383,6 +383,35 @@ encode_saved_post_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
        return encode_fattr3(rqstp, p, fhp, &fhp->fh_post_attr);
 }
 
+static bool
+svcxdr_encode_post_op_attr(struct svc_rqst *rqstp, struct xdr_stream *xdr,
+                          const struct svc_fh *fhp)
+{
+       struct dentry *dentry = fhp->fh_dentry;
+       struct kstat stat;
+
+       /*
+        * The inode may be NULL if the call failed because of a
+        * stale file handle. In this case, no attributes are
+        * returned.
+        */
+       if (fhp->fh_no_wcc || !dentry || !d_really_is_positive(dentry))
+               goto no_post_op_attrs;
+       if (fh_getattr(fhp, &stat) != nfs_ok)
+               goto no_post_op_attrs;
+
+       if (xdr_stream_encode_item_present(xdr) < 0)
+               return false;
+       lease_get_mtime(d_inode(dentry), &stat.mtime);
+       if (!svcxdr_encode_fattr3(rqstp, xdr, fhp, &stat))
+               return false;
+
+       return true;
+
+no_post_op_attrs:
+       return xdr_stream_encode_item_absent(xdr) > 0;
+}
+
 /*
  * Encode post-operation attributes.
  * The inode may be NULL if the call failed because of a stale file
@@ -835,13 +864,24 @@ nfs3svc_encode_diropres(struct svc_rqst *rqstp, __be32 *p)
 int
 nfs3svc_encode_accessres(struct svc_rqst *rqstp, __be32 *p)
 {
+       struct xdr_stream *xdr = &rqstp->rq_res_stream;
        struct nfsd3_accessres *resp = rqstp->rq_resp;
 
-       *p++ = resp->status;
-       p = encode_post_op_attr(rqstp, p, &resp->fh);
-       if (resp->status == 0)
-               *p++ = htonl(resp->access);
-       return xdr_ressize_check(rqstp, p);
+       if (!svcxdr_encode_nfsstat3(xdr, resp->status))
+               return 0;
+       switch (resp->status) {
+       case nfs_ok:
+               if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
+                       return 0;
+               if (xdr_stream_encode_u32(xdr, resp->access) < 0)
+                       return 0;
+               break;
+       default:
+               if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
+                       return 0;
+       }
+
+       return 1;
 }
 
 /* READLINK */

diff --git a/fs/nfsd/vfs.h b/fs/nfsd/vfs.h
index a2442eb..b21b76e 100644 (file)
--- a/fs/nfsd/vfs.h
+++ b/fs/nfsd/vfs.h
@@ -152,7 +152,7 @@ static inline void fh_drop_write(struct svc_fh *fh)
        }
 }
 
-static inline __be32 fh_getattr(struct svc_fh *fh, struct kstat *stat)
+static inline __be32 fh_getattr(const struct svc_fh *fh, struct kstat *stat)
 {
        struct path p = {.mnt = fh->fh_export->ex_path.mnt,
                         .dentry = fh->fh_dentry};