From 13c65ce90006badccd5663e558e3c85869ae5ce6 Mon Sep 17 00:00:00 2001 From: Benny Halevy Date: Fri, 14 Aug 2009 17:19:25 +0300 Subject: [PATCH] nfs: nfs4xdr: change RESERVE_SPACE macro into a static helper In order to open code and expose the result pointer assignment. Alternatively, we can open code the call to xdr_reserve_space and do the BUG_ON an the error case at the call site. Signed-off-by: Benny Halevy Signed-off-by: Trond Myklebust --- fs/nfs/nfs4xdr.c | 138 ++++++++++++++++++++++------------------------- 1 file changed, 65 insertions(+), 73 deletions(-) diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 7c2b162dd845..3bcde49fbea8 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -702,20 +702,12 @@ struct compound_hdr { u32 minorversion; }; -/* - * START OF "GENERIC" ENCODE ROUTINES. - * These may look a little ugly since they are imported from a "generic" - * set of XDR encode/decode routines which are intended to be shared by - * all of our NFSv4 implementations (OpenBSD, MacOS X...). - * - * If the pain of reading these is too great, it should be a straightforward - * task to translate them into Linux-specific versions which are more - * consistent with the style used in NFSv2/v3... - */ -#define RESERVE_SPACE(nbytes) do { \ - p = xdr_reserve_space(xdr, nbytes); \ - BUG_ON(!p); \ -} while (0) +static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes) +{ + __be32 *p = xdr_reserve_space(xdr, nbytes); + BUG_ON(!p); + return p; +} static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str) { @@ -740,7 +732,7 @@ static void encode_compound_hdr(struct xdr_stream *xdr, dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag); BUG_ON(hdr->taglen > NFS4_MAXTAGLEN); - RESERVE_SPACE(12 + hdr->taglen); + p = reserve_space(xdr, 12 + hdr->taglen); *p++ = cpu_to_be32(hdr->taglen); p = xdr_encode_opaque_fixed(p, hdr->tag, hdr->taglen); *p++ = cpu_to_be32(hdr->minorversion); @@ -820,7 +812,7 @@ static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const len += 16; else if (iap->ia_valid & ATTR_MTIME) len += 4; - RESERVE_SPACE(len); + p = reserve_space(xdr, len); /* * We write the bitmap length now, but leave the bitmap and the attribute @@ -891,7 +883,7 @@ static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hd { __be32 *p; - RESERVE_SPACE(8); + p = reserve_space(xdr, 8); *p++ = cpu_to_be32(OP_ACCESS); *p++ = cpu_to_be32(access); hdr->nops++; @@ -902,7 +894,7 @@ static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg { __be32 *p; - RESERVE_SPACE(8+NFS4_STATEID_SIZE); + p = reserve_space(xdr, 8+NFS4_STATEID_SIZE); *p++ = cpu_to_be32(OP_CLOSE); *p++ = cpu_to_be32(arg->seqid->sequence->counter); p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE); @@ -914,7 +906,7 @@ static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *ar { __be32 *p; - RESERVE_SPACE(16); + p = reserve_space(xdr, 16); *p++ = cpu_to_be32(OP_COMMIT); p = xdr_encode_hyper(p, args->offset); *p++ = cpu_to_be32(args->count); @@ -926,19 +918,19 @@ static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg * { __be32 *p; - RESERVE_SPACE(8); + p = reserve_space(xdr, 8); *p++ = cpu_to_be32(OP_CREATE); *p++ = cpu_to_be32(create->ftype); switch (create->ftype) { case NF4LNK: - RESERVE_SPACE(4); + p = reserve_space(xdr, 4); *p++ = cpu_to_be32(create->u.symlink.len); xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len); break; case NF4BLK: case NF4CHR: - RESERVE_SPACE(8); + p = reserve_space(xdr, 8); *p++ = cpu_to_be32(create->u.device.specdata1); *p++ = cpu_to_be32(create->u.device.specdata2); break; @@ -947,7 +939,7 @@ static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg * break; } - RESERVE_SPACE(4 + create->name->len); + p = reserve_space(xdr, 4 + create->name->len); *p++ = cpu_to_be32(create->name->len); p = xdr_encode_opaque_fixed(p, create->name->name, create->name->len); hdr->nops++; @@ -960,7 +952,7 @@ static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct c { __be32 *p; - RESERVE_SPACE(12); + p = reserve_space(xdr, 12); *p++ = cpu_to_be32(OP_GETATTR); *p++ = cpu_to_be32(1); *p++ = cpu_to_be32(bitmap); @@ -972,7 +964,7 @@ static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm { __be32 *p; - RESERVE_SPACE(16); + p = reserve_space(xdr, 16); *p++ = cpu_to_be32(OP_GETATTR); *p++ = cpu_to_be32(2); *p++ = cpu_to_be32(bm0); @@ -1003,7 +995,7 @@ static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr) { __be32 *p; - RESERVE_SPACE(4); + p = reserve_space(xdr, 4); *p++ = cpu_to_be32(OP_GETFH); hdr->nops++; hdr->replen += decode_getfh_maxsz; @@ -1013,7 +1005,7 @@ static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct { __be32 *p; - RESERVE_SPACE(8 + name->len); + p = reserve_space(xdr, 8 + name->len); *p++ = cpu_to_be32(OP_LINK); *p++ = cpu_to_be32(name->len); p = xdr_encode_opaque_fixed(p, name->name, name->len); @@ -1043,7 +1035,7 @@ static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args { __be32 *p; - RESERVE_SPACE(32); + p = reserve_space(xdr, 32); *p++ = cpu_to_be32(OP_LOCK); *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block)); *p++ = cpu_to_be32(args->reclaim); @@ -1051,7 +1043,7 @@ static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args p = xdr_encode_hyper(p, nfs4_lock_length(args->fl)); *p++ = cpu_to_be32(args->new_lock_owner); if (args->new_lock_owner){ - RESERVE_SPACE(4+NFS4_STATEID_SIZE+32); + p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+32); *p++ = cpu_to_be32(args->open_seqid->sequence->counter); p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE); *p++ = cpu_to_be32(args->lock_seqid->sequence->counter); @@ -1061,7 +1053,7 @@ static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args p = xdr_encode_hyper(p, args->lock_owner.id); } else { - RESERVE_SPACE(NFS4_STATEID_SIZE+4); + p = reserve_space(xdr, NFS4_STATEID_SIZE+4); p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE); *p++ = cpu_to_be32(args->lock_seqid->sequence->counter); } @@ -1073,7 +1065,7 @@ static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *ar { __be32 *p; - RESERVE_SPACE(52); + p = reserve_space(xdr, 52); *p++ = cpu_to_be32(OP_LOCKT); *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0)); p = xdr_encode_hyper(p, args->fl->fl_start); @@ -1090,7 +1082,7 @@ static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *ar { __be32 *p; - RESERVE_SPACE(12+NFS4_STATEID_SIZE+16); + p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16); *p++ = cpu_to_be32(OP_LOCKU); *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0)); *p++ = cpu_to_be32(args->seqid->sequence->counter); @@ -1106,7 +1098,7 @@ static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struc int len = name->len; __be32 *p; - RESERVE_SPACE(8 + len); + p = reserve_space(xdr, 8 + len); *p++ = cpu_to_be32(OP_LOOKUP); *p++ = cpu_to_be32(len); p = xdr_encode_opaque_fixed(p, name->name, len); @@ -1118,7 +1110,7 @@ static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode) { __be32 *p; - RESERVE_SPACE(8); + p = reserve_space(xdr, 8); switch (fmode & (FMODE_READ|FMODE_WRITE)) { case FMODE_READ: *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ); @@ -1142,11 +1134,11 @@ static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_opena * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4, * owner 4 = 32 */ - RESERVE_SPACE(8); + p = reserve_space(xdr, 8); *p++ = cpu_to_be32(OP_OPEN); *p++ = cpu_to_be32(arg->seqid->sequence->counter); encode_share_access(xdr, arg->fmode); - RESERVE_SPACE(28); + p = reserve_space(xdr, 28); p = xdr_encode_hyper(p, arg->clientid); *p++ = cpu_to_be32(16); p = xdr_encode_opaque_fixed(p, "open id:", 8); @@ -1157,7 +1149,7 @@ static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_op { __be32 *p; - RESERVE_SPACE(4); + p = reserve_space(xdr, 4); switch(arg->open_flags & O_EXCL) { case 0: *p++ = cpu_to_be32(NFS4_CREATE_UNCHECKED); @@ -1173,7 +1165,7 @@ static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *a { __be32 *p; - RESERVE_SPACE(4); + p = reserve_space(xdr, 4); switch (arg->open_flags & O_CREAT) { case 0: *p++ = cpu_to_be32(NFS4_OPEN_NOCREATE); @@ -1189,7 +1181,7 @@ static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delega { __be32 *p; - RESERVE_SPACE(4); + p = reserve_space(xdr, 4); switch (delegation_type) { case 0: *p++ = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE); @@ -1209,7 +1201,7 @@ static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr * { __be32 *p; - RESERVE_SPACE(4); + p = reserve_space(xdr, 4); *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_NULL); encode_string(xdr, name->len, name->name); } @@ -1218,7 +1210,7 @@ static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type) { __be32 *p; - RESERVE_SPACE(4); + p = reserve_space(xdr, 4); *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS); encode_delegation_type(xdr, type); } @@ -1227,7 +1219,7 @@ static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struc { __be32 *p; - RESERVE_SPACE(4+NFS4_STATEID_SIZE); + p = reserve_space(xdr, 4+NFS4_STATEID_SIZE); *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR); p = xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE); encode_string(xdr, name->len, name->name); @@ -1258,7 +1250,7 @@ static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_co { __be32 *p; - RESERVE_SPACE(4+NFS4_STATEID_SIZE+4); + p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4); *p++ = cpu_to_be32(OP_OPEN_CONFIRM); p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE); *p++ = cpu_to_be32(arg->seqid->sequence->counter); @@ -1270,7 +1262,7 @@ static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_close { __be32 *p; - RESERVE_SPACE(4+NFS4_STATEID_SIZE+4); + p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4); *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE); p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE); *p++ = cpu_to_be32(arg->seqid->sequence->counter); @@ -1285,7 +1277,7 @@ encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hd int len = fh->size; __be32 *p; - RESERVE_SPACE(8 + len); + p = reserve_space(xdr, 8 + len); *p++ = cpu_to_be32(OP_PUTFH); *p++ = cpu_to_be32(len); p = xdr_encode_opaque_fixed(p, fh->data, len); @@ -1297,7 +1289,7 @@ static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr) { __be32 *p; - RESERVE_SPACE(4); + p = reserve_space(xdr, 4); *p++ = cpu_to_be32(OP_PUTROOTFH); hdr->nops++; hdr->replen += decode_putrootfh_maxsz; @@ -1308,7 +1300,7 @@ static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context nfs4_stateid stateid; __be32 *p; - RESERVE_SPACE(NFS4_STATEID_SIZE); + p = reserve_space(xdr, NFS4_STATEID_SIZE); if (ctx->state != NULL) { nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner); p = xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE); @@ -1320,12 +1312,12 @@ static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, { __be32 *p; - RESERVE_SPACE(4); + p = reserve_space(xdr, 4); *p++ = cpu_to_be32(OP_READ); encode_stateid(xdr, args->context); - RESERVE_SPACE(12); + p = reserve_space(xdr, 12); p = xdr_encode_hyper(p, args->offset); *p++ = cpu_to_be32(args->count); hdr->nops++; @@ -1340,7 +1332,7 @@ static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg }; __be32 *p; - RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20); + p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20); *p++ = cpu_to_be32(OP_READDIR); p = xdr_encode_hyper(p, readdir->cookie); p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE); @@ -1369,7 +1361,7 @@ static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink * { __be32 *p; - RESERVE_SPACE(4); + p = reserve_space(xdr, 4); *p++ = cpu_to_be32(OP_READLINK); hdr->nops++; hdr->replen += decode_readlink_maxsz; @@ -1379,7 +1371,7 @@ static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struc { __be32 *p; - RESERVE_SPACE(8 + name->len); + p = reserve_space(xdr, 8 + name->len); *p++ = cpu_to_be32(OP_REMOVE); *p++ = cpu_to_be32(name->len); p = xdr_encode_opaque_fixed(p, name->name, name->len); @@ -1391,12 +1383,12 @@ static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, co { __be32 *p; - RESERVE_SPACE(8 + oldname->len); + p = reserve_space(xdr, 8 + oldname->len); *p++ = cpu_to_be32(OP_RENAME); *p++ = cpu_to_be32(oldname->len); p = xdr_encode_opaque_fixed(p, oldname->name, oldname->len); - RESERVE_SPACE(4 + newname->len); + p = reserve_space(xdr, 4 + newname->len); *p++ = cpu_to_be32(newname->len); p = xdr_encode_opaque_fixed(p, newname->name, newname->len); hdr->nops++; @@ -1407,7 +1399,7 @@ static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client { __be32 *p; - RESERVE_SPACE(12); + p = reserve_space(xdr, 12); *p++ = cpu_to_be32(OP_RENEW); p = xdr_encode_hyper(p, client_stateid->cl_clientid); hdr->nops++; @@ -1419,7 +1411,7 @@ encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr) { __be32 *p; - RESERVE_SPACE(4); + p = reserve_space(xdr, 4); *p++ = cpu_to_be32(OP_RESTOREFH); hdr->nops++; hdr->replen += decode_restorefh_maxsz; @@ -1430,15 +1422,15 @@ encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compoun { __be32 *p; - RESERVE_SPACE(4+NFS4_STATEID_SIZE); + p = reserve_space(xdr, 4+NFS4_STATEID_SIZE); *p++ = cpu_to_be32(OP_SETATTR); p = xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE); - RESERVE_SPACE(2*4); + p = reserve_space(xdr, 2*4); *p++ = cpu_to_be32(1); *p++ = cpu_to_be32(FATTR4_WORD0_ACL); if (arg->acl_len % 4) return -EINVAL; - RESERVE_SPACE(4); + p = reserve_space(xdr, 4); *p++ = cpu_to_be32(arg->acl_len); xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len); hdr->nops++; @@ -1451,7 +1443,7 @@ encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr) { __be32 *p; - RESERVE_SPACE(4); + p = reserve_space(xdr, 4); *p++ = cpu_to_be32(OP_SAVEFH); hdr->nops++; hdr->replen += decode_savefh_maxsz; @@ -1461,7 +1453,7 @@ static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs { __be32 *p; - RESERVE_SPACE(4+NFS4_STATEID_SIZE); + p = reserve_space(xdr, 4+NFS4_STATEID_SIZE); *p++ = cpu_to_be32(OP_SETATTR); p = xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE); hdr->nops++; @@ -1473,16 +1465,16 @@ static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclie { __be32 *p; - RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE); + p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE); *p++ = cpu_to_be32(OP_SETCLIENTID); p = xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE); encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name); - RESERVE_SPACE(4); + p = reserve_space(xdr, 4); *p++ = cpu_to_be32(setclientid->sc_prog); encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid); encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr); - RESERVE_SPACE(4); + p = reserve_space(xdr, 4); *p++ = cpu_to_be32(setclientid->sc_cb_ident); hdr->nops++; hdr->replen += decode_setclientid_maxsz; @@ -1492,7 +1484,7 @@ static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_ { __be32 *p; - RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE); + p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE); *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM); p = xdr_encode_hyper(p, client_state->cl_clientid); p = xdr_encode_opaque_fixed(p, client_state->cl_confirm.data, NFS4_VERIFIER_SIZE); @@ -1504,12 +1496,12 @@ static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *arg { __be32 *p; - RESERVE_SPACE(4); + p = reserve_space(xdr, 4); *p++ = cpu_to_be32(OP_WRITE); encode_stateid(xdr, args->context); - RESERVE_SPACE(16); + p = reserve_space(xdr, 16); p = xdr_encode_hyper(p, args->offset); *p++ = cpu_to_be32(args->stable); *p++ = cpu_to_be32(args->count); @@ -1523,7 +1515,7 @@ static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *state { __be32 *p; - RESERVE_SPACE(4+NFS4_STATEID_SIZE); + p = reserve_space(xdr, 4+NFS4_STATEID_SIZE); *p++ = cpu_to_be32(OP_DELEGRETURN); p = xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE); @@ -1539,13 +1531,13 @@ static void encode_exchange_id(struct xdr_stream *xdr, { __be32 *p; - RESERVE_SPACE(4 + sizeof(args->verifier->data)); + p = reserve_space(xdr, 4 + sizeof(args->verifier->data)); *p++ = cpu_to_be32(OP_EXCHANGE_ID); p = xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data)); encode_string(xdr, args->id_len, args->id); - RESERVE_SPACE(12); + p = reserve_space(xdr, 12); *p++ = cpu_to_be32(args->flags); *p++ = cpu_to_be32(0); /* zero length state_protect4_a */ *p++ = cpu_to_be32(0); /* zero length implementation id array */ @@ -1565,7 +1557,7 @@ static void encode_create_session(struct xdr_stream *xdr, len = scnprintf(machine_name, sizeof(machine_name), "%s", clp->cl_ipaddr); - RESERVE_SPACE(20 + 2*28 + 20 + len + 12); + p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12); *p++ = cpu_to_be32(OP_CREATE_SESSION); p = xdr_encode_hyper(p, clp->cl_ex_clid); *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */ @@ -1609,7 +1601,7 @@ static void encode_destroy_session(struct xdr_stream *xdr, struct compound_hdr *hdr) { __be32 *p; - RESERVE_SPACE(4 + NFS4_MAX_SESSIONID_LEN); + p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN); *p++ = cpu_to_be32(OP_DESTROY_SESSION); p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN); hdr->nops++; @@ -1635,7 +1627,7 @@ static void encode_sequence(struct xdr_stream *xdr, WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE); slot = tp->slots + args->sa_slotid; - RESERVE_SPACE(4 + NFS4_MAX_SESSIONID_LEN + 16); + p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16); *p++ = cpu_to_be32(OP_SEQUENCE); /*