NFSv4: Add directory post-op attributes to the CREATE operations.

 Since the directory attributes change every time we CREATE a file,
 we might as well pick up the new directory attributes in the same
 compound.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/nfs4proc.c

@@ -443,7 +443,11 @@ static int _nfs4_proc_open(struct inode *dir, struct nfs4_state_owner  *sp, stru
 	nfs_increment_open_seqid(status, o_arg->seqid);
 	if (status != 0)
 		goto out;
-	update_changeattr(dir, &o_res->cinfo);
+	if (o_arg->open_flags & O_CREAT) {
+		update_changeattr(dir, &o_res->cinfo);
+		nfs_post_op_update_inode(dir, o_res->dir_attr);
+	} else
+		nfs_refresh_inode(dir, o_res->dir_attr);
 	if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
 		status = _nfs4_proc_open_confirm(server->client, &o_res->fh,
 				sp, &o_res->stateid, o_arg->seqid);
@@ -497,7 +501,7 @@ static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *st
 	struct inode *inode = state->inode;
 	struct nfs_server *server = NFS_SERVER(dir);
 	struct nfs_delegation *delegation = NFS_I(inode)->delegation;
-	struct nfs_fattr        f_attr;
+	struct nfs_fattr f_attr, dir_attr;
 	struct nfs_openargs o_arg = {
 		.fh = NFS_FH(dir),
 		.open_flags = state->state,
@@ -507,6 +511,7 @@ static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *st
 	};
 	struct nfs_openres o_res = {
 		.f_attr = &f_attr,
+		.dir_attr = &dir_attr,
 		.server = server,
 	};
 	int status = 0;
@@ -524,6 +529,7 @@ static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *st
 	if (o_arg.seqid == NULL)
 		goto out;
 	nfs_fattr_init(&f_attr);
+	nfs_fattr_init(&dir_attr);
 	status = _nfs4_proc_open(dir, sp, &o_arg, &o_res);
 	if (status != 0)
 		goto out_nodeleg;
@@ -694,7 +700,7 @@ static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, st
 	struct nfs4_client *clp = server->nfs4_state;
 	struct inode *inode = NULL;
 	int                     status;
-	struct nfs_fattr        f_attr;
+	struct nfs_fattr f_attr, dir_attr;
 	struct nfs_openargs o_arg = {
 		.fh             = NFS_FH(dir),
 		.open_flags	= flags,
@@ -705,6 +711,7 @@ static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, st
 	};
 	struct nfs_openres o_res = {
 		.f_attr         = &f_attr,
+		.dir_attr	= &dir_attr,
 		.server         = server,
 	};
 
@@ -727,6 +734,7 @@ static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, st
 	if (o_arg.seqid == NULL)
 		return -ENOMEM;
 	nfs_fattr_init(&f_attr);
+	nfs_fattr_init(&dir_attr);
 	status = _nfs4_proc_open(dir, sp, &o_arg, &o_res);
 	if (status != 0)
 		goto out_err;
@@ -1746,6 +1754,7 @@ static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name,
 		struct nfs_fattr *fattr)
 {
 	struct nfs_server *server = NFS_SERVER(dir);
+	struct nfs_fattr dir_fattr;
 	struct nfs4_create_arg arg = {
 		.dir_fh = NFS_FH(dir),
 		.server = server,
@@ -1758,6 +1767,7 @@ static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name,
 		.server = server,
 		.fh = fhandle,
 		.fattr = fattr,
+		.dir_fattr = &dir_fattr,
 	};
 	struct rpc_message msg = {
 		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
@@ -1770,10 +1780,12 @@ static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name,
 		return -ENAMETOOLONG;
 	arg.u.symlink = path;
 	nfs_fattr_init(fattr);
+	nfs_fattr_init(&dir_fattr);
 	
 	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 	if (!status)
 		update_changeattr(dir, &res.dir_cinfo);
+	nfs_post_op_update_inode(dir, res.dir_fattr);
 	return status;
 }
 
@@ -1797,7 +1809,7 @@ static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
 {
 	struct nfs_server *server = NFS_SERVER(dir);
 	struct nfs_fh fhandle;
-	struct nfs_fattr fattr;
+	struct nfs_fattr fattr, dir_fattr;
 	struct nfs4_create_arg arg = {
 		.dir_fh = NFS_FH(dir),
 		.server = server,
@@ -1810,6 +1822,7 @@ static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
 		.server = server,
 		.fh = &fhandle,
 		.fattr = &fattr,
+		.dir_fattr = &dir_fattr,
 	};
 	struct rpc_message msg = {
 		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
@@ -1819,10 +1832,12 @@ static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
 	int			status;
 
 	nfs_fattr_init(&fattr);
+	nfs_fattr_init(&dir_fattr);
 	
 	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 	if (!status) {
 		update_changeattr(dir, &res.dir_cinfo);
+		nfs_post_op_update_inode(dir, res.dir_fattr);
 		status = nfs_instantiate(dentry, &fhandle, &fattr);
 	}
 	return status;
@@ -1895,7 +1910,7 @@ static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
 {
 	struct nfs_server *server = NFS_SERVER(dir);
 	struct nfs_fh fh;
-	struct nfs_fattr fattr;
+	struct nfs_fattr fattr, dir_fattr;
 	struct nfs4_create_arg arg = {
 		.dir_fh = NFS_FH(dir),
 		.server = server,
@@ -1907,6 +1922,7 @@ static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
 		.server = server,
 		.fh = &fh,
 		.fattr = &fattr,
+		.dir_fattr = &dir_fattr,
 	};
 	struct rpc_message msg = {
 		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
@@ -1917,6 +1933,7 @@ static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
 	int                     mode = sattr->ia_mode;
 
 	nfs_fattr_init(&fattr);
+	nfs_fattr_init(&dir_fattr);
 
 	BUG_ON(!(sattr->ia_valid & ATTR_MODE));
 	BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
@@ -1938,6 +1955,7 @@ static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
 	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 	if (status == 0) {
 		update_changeattr(dir, &res.dir_cinfo);
+		nfs_post_op_update_inode(dir, res.dir_fattr);
 		status = nfs_instantiate(dentry, &fh, &fattr);
 	}
 	return status;

fs/nfs/nfs4xdr.c

@@ -95,6 +95,8 @@ static int nfs_stat_to_errno(int);
 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
+#define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
+#define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 #define encode_fsinfo_maxsz	(op_encode_hdr_maxsz + 2)
 #define decode_fsinfo_maxsz	(op_decode_hdr_maxsz + 11)
 #define encode_renew_maxsz	(op_encode_hdr_maxsz + 3)
@@ -336,14 +338,20 @@ static int nfs_stat_to_errno(int);
 				decode_getfh_maxsz)
 #define NFS4_enc_create_sz	(compound_encode_hdr_maxsz + \
 				encode_putfh_maxsz + \
+				encode_savefh_maxsz + \
 				encode_create_maxsz + \
+				encode_getfh_maxsz + \
 				encode_getattr_maxsz + \
-				encode_getfh_maxsz)
+				encode_restorefh_maxsz + \
+				encode_getattr_maxsz)
 #define NFS4_dec_create_sz	(compound_decode_hdr_maxsz + \
 				decode_putfh_maxsz + \
+				decode_savefh_maxsz + \
 				decode_create_maxsz + \
+				decode_getfh_maxsz + \
 				decode_getattr_maxsz + \
-				decode_getfh_maxsz)
+				decode_restorefh_maxsz + \
+				decode_getattr_maxsz)
 #define NFS4_enc_pathconf_sz	(compound_encode_hdr_maxsz + \
 				encode_putfh_maxsz + \
 				encode_getattr_maxsz)
@@ -1112,6 +1120,17 @@ static int encode_renew(struct xdr_stream *xdr, const struct nfs4_client *client
 	return 0;
 }
 
+static int
+encode_restorefh(struct xdr_stream *xdr)
+{
+	uint32_t *p;
+
+	RESERVE_SPACE(4);
+	WRITE32(OP_RESTOREFH);
+
+	return 0;
+}
+
 static int
 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
 {
@@ -1358,7 +1377,7 @@ static int nfs4_xdr_enc_create(struct rpc_rqst *req, uint32_t *p, const struct n
 {
 	struct xdr_stream xdr;
 	struct compound_hdr hdr = {
-		.nops = 4,
+		.nops = 7,
 	};
 	int status;
 
@@ -1366,10 +1385,16 @@ static int nfs4_xdr_enc_create(struct rpc_rqst *req, uint32_t *p, const struct n
 	encode_compound_hdr(&xdr, &hdr);
 	if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
 		goto out;
+	if ((status = encode_savefh(&xdr)) != 0)
+		goto out;
 	if ((status = encode_create(&xdr, args)) != 0)
 		goto out;
 	if ((status = encode_getfh(&xdr)) != 0)
 		goto out;
+	if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
+		goto out;
+	if ((status = encode_restorefh(&xdr)) != 0)
+		goto out;
 	status = encode_getfattr(&xdr, args->bitmask);
 out:
 	return status;
@@ -1429,7 +1454,7 @@ static int nfs4_xdr_enc_open(struct rpc_rqst *req, uint32_t *p, struct nfs_opena
 {
 	struct xdr_stream xdr;
 	struct compound_hdr hdr = {
-		.nops = 4,
+		.nops = 7,
 	};
 	int status;
 
@@ -1439,6 +1464,9 @@ static int nfs4_xdr_enc_open(struct rpc_rqst *req, uint32_t *p, struct nfs_opena
 	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
 	encode_compound_hdr(&xdr, &hdr);
 	status = encode_putfh(&xdr, args->fh);
+	if (status)
+		goto out;
+	status = encode_savefh(&xdr);
 	if (status)
 		goto out;
 	status = encode_open(&xdr, args);
@@ -1448,6 +1476,12 @@ static int nfs4_xdr_enc_open(struct rpc_rqst *req, uint32_t *p, struct nfs_opena
 	if (status)
 		goto out;
 	status = encode_getfattr(&xdr, args->bitmask);
+	if (status)
+		goto out;
+	status = encode_restorefh(&xdr);
+	if (status)
+		goto out;
+	status = encode_getfattr(&xdr, args->bitmask);
 out:
 	return status;
 }
@@ -3218,6 +3252,12 @@ static int decode_renew(struct xdr_stream *xdr)
 	return decode_op_hdr(xdr, OP_RENEW);
 }
 
+static int
+decode_restorefh(struct xdr_stream *xdr)
+{
+	return decode_op_hdr(xdr, OP_RESTOREFH);
+}
+
 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
 		size_t *acl_len)
 {
@@ -3510,13 +3550,17 @@ static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_
 		goto out;
 	if ((status = decode_putfh(&xdr)) != 0)
 		goto out;
+	if ((status = decode_savefh(&xdr)) != 0)
+		goto out;
 	if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
 		goto out;
 	if ((status = decode_getfh(&xdr, res->fh)) != 0)
 		goto out;
-	status = decode_getfattr(&xdr, res->fattr, res->server);
-	if (status == NFS4ERR_DELAY)
-		status = 0;
+	if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
+		goto out;
+	if ((status = decode_restorefh(&xdr)) != 0)
+		goto out;
+	decode_getfattr(&xdr, res->dir_fattr, res->server);
 out:
 	return status;
 }
@@ -3654,15 +3698,20 @@ static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_ope
         status = decode_putfh(&xdr);
         if (status)
                 goto out;
+        status = decode_savefh(&xdr);
+	if (status)
+		goto out;
         status = decode_open(&xdr, res);
         if (status)
                 goto out;
 	status = decode_getfh(&xdr, &res->fh);
         if (status)
 		goto out;
-	status = decode_getfattr(&xdr, res->f_attr, res->server);
-	if (status == NFS4ERR_DELAY)
-		status = 0;
+	if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
+		goto out;
+	if ((status = decode_restorefh(&xdr)) != 0)
+		goto out;
+	decode_getfattr(&xdr, res->dir_attr, res->server);
 out:
         return status;
 }

include/linux/nfs_xdr.h

@@ -124,6 +124,7 @@ struct nfs_openres {
 	struct nfs4_change_info	cinfo;
 	__u32                   rflags;
 	struct nfs_fattr *      f_attr;
+	struct nfs_fattr *      dir_attr;
 	const struct nfs_server *server;
 	int			delegation_type;
 	nfs4_stateid		delegation;
@@ -540,6 +541,7 @@ struct nfs4_create_res {
 	struct nfs_fh *			fh;
 	struct nfs_fattr *		fattr;
 	struct nfs4_change_info		dir_cinfo;
+	struct nfs_fattr *		dir_fattr;
 };
 
 struct nfs4_fsinfo_arg {