nfscl: Add support for va_birthtime to NFSv4

There is a NFSv4 file attribute called TimeCreate
that can be used for va_birthtime.
r362175 added some support for use of TimeCreate.
This patch completes support of va_birthtime by adding
support for setting this attribute to the server.
It also eanbles the client to
acquire and set the attribute for a NFSv4
server that supports the attribute.

Reviewed by:	markj
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D30156

sys/fs/nfs/nfs_commonsubs.c

@@ -1248,6 +1248,8 @@ nfsv4_loadattr(struct nfsrv_descript *nd, vnode_t vp,
 			nap->na_rdev = (NFSDEV_T)0;
 			nap->na_mtime.tv_sec = 0;
 			nap->na_mtime.tv_nsec = 0;
+			nap->na_btime.tv_sec = -1;
+			nap->na_btime.tv_nsec = 0;
 			nap->na_gen = 0;
 			nap->na_flags = 0;
 			nap->na_blocksize = NFS_FABLKSIZE;

sys/fs/nfs/nfsproto.h

@@ -1227,6 +1227,7 @@ struct nfsv3_sattr {
  	NFSATTRBM_RAWDEV |						\
  	NFSATTRBM_SPACEUSED |						\
  	NFSATTRBM_TIMEACCESS |						\
+	NFSATTRBM_TIMECREATE |						\
  	NFSATTRBM_TIMEMETADATA |					\
  	NFSATTRBM_TIMEMODIFY)
 
@@ -1258,6 +1259,7 @@ struct nfsv3_sattr {
  	NFSATTRBM_RAWDEV |						\
  	NFSATTRBM_SPACEUSED |						\
  	NFSATTRBM_TIMEACCESS |						\
+	NFSATTRBM_TIMECREATE |						\
  	NFSATTRBM_TIMEMETADATA |					\
  	NFSATTRBM_TIMEMODIFY)
 

sys/fs/nfsclient/nfs_clcomsubs.c

@@ -284,6 +284,8 @@ nfsm_loadattr(struct nfsrv_descript *nd, struct nfsvattr *nap)
 		fxdr_nfsv3time(&fp->fa3_atime, &nap->na_atime);
 		fxdr_nfsv3time(&fp->fa3_ctime, &nap->na_ctime);
 		fxdr_nfsv3time(&fp->fa3_mtime, &nap->na_mtime);
+		nap->na_btime.tv_sec = -1;
+		nap->na_btime.tv_nsec = 0;
 		nap->na_flags = 0;
 		nap->na_gen = 0;
 		nap->na_filerev = 0;
@@ -315,6 +317,8 @@ nfsm_loadattr(struct nfsrv_descript *nd, struct nfsvattr *nap)
 		nap->na_ctime.tv_sec = fxdr_unsigned(u_int32_t,
 		    fp->fa2_ctime.nfsv2_sec);
 		nap->na_ctime.tv_nsec = 0;
+		nap->na_btime.tv_sec = -1;
+		nap->na_btime.tv_nsec = 0;
 		nap->na_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec);
 		nap->na_filerev = 0;
 	}

sys/fs/nfsclient/nfs_clport.c

@@ -415,6 +415,7 @@ ncl_copy_vattr(struct vattr *dst, struct vattr *src)
 	dst->va_atime = src->va_atime;
 	dst->va_mtime = src->va_mtime;
 	dst->va_ctime = src->va_ctime;
+	dst->va_birthtime = src->va_birthtime;
 	dst->va_gen = src->va_gen;
 	dst->va_flags = src->va_flags;
 	dst->va_rdev = src->va_rdev;
@@ -466,6 +467,7 @@ nfscl_loadattrcache(struct vnode **vpp, struct nfsvattr *nap, void *nvaper,
 		np->n_vattr.na_size = nap->na_size;
 		np->n_vattr.na_mtime = nap->na_mtime;
 		np->n_vattr.na_ctime = nap->na_ctime;
+		np->n_vattr.na_btime = nap->na_btime;
 		np->n_vattr.na_fsid = nap->na_fsid;
 		np->n_vattr.na_mode = nap->na_mode;
 	} else {

sys/fs/nfsclient/nfs_clrpcops.c

@@ -3548,6 +3548,9 @@ nfsrpc_readdirplus(vnode_t vp, struct uio *uiop, nfsuint64 *cookiep,
 		if (gotmnton)
 			NFSSETBIT_ATTRBIT(&attrbits,
 			    NFSATTRBIT_MOUNTEDONFILEID);
+		if (!NFSISSET_ATTRBIT(&dnp->n_vattr.na_suppattr,
+		    NFSATTRBIT_TIMECREATE))
+			NFSCLRBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMECREATE);
 	}
 
 	/*

sys/fs/nfsclient/nfs_clvnops.c

@@ -1024,7 +1024,9 @@ nfs_setattr(struct vop_setattr_args *ap)
 	 */
   	if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
 	    vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
-	    vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
+	    vap->va_mtime.tv_sec != VNOVAL ||
+	    vap->va_birthtime.tv_sec != VNOVAL ||
+	    vap->va_mode != (mode_t)VNOVAL) &&
 	    (vp->v_mount->mnt_flag & MNT_RDONLY))
 		return (EROFS);
 	if (vap->va_size != VNOVAL) {
@@ -1037,6 +1039,7 @@ nfs_setattr(struct vop_setattr_args *ap)
  		case VFIFO:
 			if (vap->va_mtime.tv_sec == VNOVAL &&
 			    vap->va_atime.tv_sec == VNOVAL &&
+			    vap->va_birthtime.tv_sec == VNOVAL &&
 			    vap->va_mode == (mode_t)VNOVAL &&
 			    vap->va_uid == (uid_t)VNOVAL &&
 			    vap->va_gid == (gid_t)VNOVAL)

sys/fs/nfsserver/nfs_nfsdserv.c

@@ -491,6 +491,15 @@ nfsrvd_setattr(struct nfsrv_descript *nd, __unused int isdgram,
 			NFSSETBIT_ATTRBIT(&retbits, NFSATTRBIT_TIMEMODIFYSET);
 		}
 	    }
+	    if (!nd->nd_repstat &&
+		NFSISSET_ATTRBIT(&attrbits, NFSATTRBIT_TIMECREATE)) {
+		NFSVNO_ATTRINIT(&nva2);
+		NFSVNO_SETATTRVAL(&nva2, btime, nva.na_btime);
+		nd->nd_repstat = nfsvno_setattr(vp, &nva2, nd->nd_cred, p,
+		    exp);
+		if (!nd->nd_repstat)
+		    NFSSETBIT_ATTRBIT(&retbits, NFSATTRBIT_TIMECREATE);
+	    }
 	    if (!nd->nd_repstat &&
 		(NFSISSET_ATTRBIT(&attrbits, NFSATTRBIT_MODE) ||
 		 NFSISSET_ATTRBIT(&attrbits, NFSATTRBIT_MODESETMASKED))) {