C++ xdr_encode_hyper函数代码示例

static __be32 *
encode_fattr3(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
	      struct kstat *stat)
{
	struct timespec ts;
	*p++ = htonl(nfs3_ftypes[(stat->mode & S_IFMT) >> 12]);
	*p++ = htonl((u32) (stat->mode & S_IALLUGO));
	*p++ = htonl((u32) stat->nlink);
	*p++ = htonl((u32) from_kuid(&init_user_ns, stat->uid));
	*p++ = htonl((u32) from_kgid(&init_user_ns, stat->gid));
	if (S_ISLNK(stat->mode) && stat->size > NFS3_MAXPATHLEN) {
		p = xdr_encode_hyper(p, (u64) NFS3_MAXPATHLEN);
	} else {
		p = xdr_encode_hyper(p, (u64) stat->size);
	}
	p = xdr_encode_hyper(p, ((u64)stat->blocks) << 9);
	*p++ = htonl((u32) MAJOR(stat->rdev));
	*p++ = htonl((u32) MINOR(stat->rdev));
	p = encode_fsid(p, fhp);
	p = xdr_encode_hyper(p, stat->ino);
	ts = timespec64_to_timespec(stat->atime);
	p = encode_time3(p, &ts);
	ts = timespec64_to_timespec(stat->mtime);
	p = encode_time3(p, &ts);
	ts = timespec64_to_timespec(stat->ctime);
	p = encode_time3(p, &ts);

	return p;
}

static int gssx_enc_cb(struct xdr_stream *xdr, struct gssx_cb *cb)
{
	__be32 *p;
	int err;

	/* cb->initiator_addrtype */
	p = xdr_reserve_space(xdr, 8);
	if (!p)
		return -ENOSPC;
	p = xdr_encode_hyper(p, cb->initiator_addrtype);

	/* cb->initiator_address */
	err = gssx_enc_buffer(xdr, &cb->initiator_address);
	if (err)
		return err;

	/* cb->acceptor_addrtype */
	p = xdr_reserve_space(xdr, 8);
	if (!p)
		return -ENOSPC;
	p = xdr_encode_hyper(p, cb->acceptor_addrtype);

	/* cb->acceptor_address */
	err = gssx_enc_buffer(xdr, &cb->acceptor_address);
	if (err)
		return err;

	/* cb->application_data */
	err = gssx_enc_buffer(xdr, &cb->application_data);

	return err;
}

/*
 * Encode a lock as part of an NLM call
 */
static __be32 *
nlm4_encode_lock(__be32 *p, struct nlm_lock *lock)
{
    struct file_lock    *fl = &lock->fl;
    __s64            start, len;

    if (!(p = xdr_encode_string(p, lock->caller))
     || !(p = nlm4_encode_fh(p, &lock->fh))
     || !(p = nlm4_encode_oh(p, &lock->oh)))
        return NULL;

    if (fl->fl_start > NLM4_OFFSET_MAX
     || (fl->fl_end > NLM4_OFFSET_MAX && fl->fl_end != OFFSET_MAX))
        return NULL;

    *p++ = htonl(lock->svid);

    start = loff_t_to_s64(fl->fl_start);
    if (fl->fl_end == OFFSET_MAX)
        len = 0;
    else
        len = loff_t_to_s64(fl->fl_end - fl->fl_start + 1);

    p = xdr_encode_hyper(p, start);
    p = xdr_encode_hyper(p, len);

    return p;
}

static void
nfs4_setup_readdir(struct nfs4_compound *cp, u64 cookie, u32 *verifier,
		     struct page **pages, unsigned int bufsize, struct dentry *dentry)
{
	u32 *start, *p;
	struct nfs4_readdir *readdir = GET_OP(cp, readdir);

	BUG_ON(bufsize < 80);
	readdir->rd_cookie = (cookie > 2) ? cookie : 0;
	memcpy(&readdir->rd_req_verifier, verifier, sizeof(readdir->rd_req_verifier));
	readdir->rd_count = bufsize;
	readdir->rd_bmval[0] = FATTR4_WORD0_FILEID;
	readdir->rd_bmval[1] = 0;
	readdir->rd_pages = pages;
	readdir->rd_pgbase = 0;
	
	OPNUM(cp) = OP_READDIR;
	cp->req_nops++;

	if (cookie >= 2)
		return;
	
	/*
	 * NFSv4 servers do not return entries for '.' and '..'
	 * Therefore, we fake these entries here.  We let '.'
	 * have cookie 0 and '..' have cookie 1.  Note that
	 * when talking to the server, we always send cookie 0
	 * instead of 1 or 2.
	 */
	start = p = (u32 *)kmap_atomic(*pages, KM_USER0);
	
	if (cookie == 0) {
		*p++ = xdr_one;                                  /* next */
		*p++ = xdr_zero;                   /* cookie, first word */
		*p++ = xdr_one;                   /* cookie, second word */
		*p++ = xdr_one;                             /* entry len */
		memcpy(p, ".\0\0\0", 4);                        /* entry */
		p++;
		*p++ = xdr_one;                         /* bitmap length */
		*p++ = htonl(FATTR4_WORD0_FILEID);             /* bitmap */
		*p++ = htonl(8);              /* attribute buffer length */
		p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
	}
	
	*p++ = xdr_one;                                  /* next */
	*p++ = xdr_zero;                   /* cookie, first word */
	*p++ = xdr_two;                   /* cookie, second word */
	*p++ = xdr_two;                             /* entry len */
	memcpy(p, "..\0\0", 4);                         /* entry */
	p++;
	*p++ = xdr_one;                         /* bitmap length */
	*p++ = htonl(FATTR4_WORD0_FILEID);             /* bitmap */
	*p++ = htonl(8);              /* attribute buffer length */
	p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));

	readdir->rd_pgbase = (char *)p - (char *)start;
	readdir->rd_count -= readdir->rd_pgbase;
	kunmap_atomic(start, KM_USER0);
}

void pnfs_osd_xdr_encode_ioerr(__be32 *p, struct pnfs_osd_ioerr *ioerr)
{
	p = pnfs_osd_xdr_encode_objid(p, &ioerr->oer_component);
	p = xdr_encode_hyper(p, ioerr->oer_comp_offset);
	p = xdr_encode_hyper(p, ioerr->oer_comp_length);
	*p++ = cpu_to_be32(ioerr->oer_iswrite);
	*p   = cpu_to_be32(ioerr->oer_errno);
}

static inline __be32 *
pnfs_osd_xdr_encode_objid(__be32 *p, struct pnfs_osd_objid *object_id)
{
	p = xdr_encode_opaque_fixed(p, &object_id->oid_device_id.data,
				    sizeof(object_id->oid_device_id.data));
	p = xdr_encode_hyper(p, object_id->oid_partition_id);
	p = xdr_encode_hyper(p, object_id->oid_object_id);

	return p;
}

static __be32 *
encode_entry_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name,
	     int namlen, u64 ino)
{
	*p++ = xdr_one;				 /* mark entry present */
	p    = xdr_encode_hyper(p, ino);	 /* file id */
	p    = xdr_encode_array(p, name, namlen);/* name length & name */

	cd->offset = p;				/* remember pointer */
	p = xdr_encode_hyper(p, NFS_OFFSET_MAX);/* offset of next entry */

	return p;
}

static void encode_clone(struct xdr_stream *xdr,
			 struct nfs42_clone_args *args,
			 struct compound_hdr *hdr)
{
	__be32 *p;

	encode_op_hdr(xdr, OP_CLONE, decode_clone_maxsz, hdr);
	encode_nfs4_stateid(xdr, &args->src_stateid);
	encode_nfs4_stateid(xdr, &args->dst_stateid);
	p = reserve_space(xdr, 3*8);
	p = xdr_encode_hyper(p, args->src_offset);
	p = xdr_encode_hyper(p, args->dst_offset);
	xdr_encode_hyper(p, args->count);
}

/*
 *	struct nlm4_holder {
 *		bool	exclusive;
 *		int32	svid;
 *		netobj	oh;
 *		uint64	l_offset;
 *		uint64	l_len;
 *	};
 */
static void encode_nlm4_holder(struct xdr_stream *xdr,
			       const struct nlm_res *result)
{
	const struct nlm_lock *lock = &result->lock;
	u64 l_offset, l_len;
	__be32 *p;

	encode_bool(xdr, lock->fl.fl_type == F_RDLCK);
	encode_int32(xdr, lock->svid);
	encode_netobj(xdr, lock->oh.data, lock->oh.len);

	p = xdr_reserve_space(xdr, 4 + 4);
	nlm4_compute_offsets(lock, &l_offset, &l_len);
	p = xdr_encode_hyper(p, l_offset);
	xdr_encode_hyper(p, l_len);
}

static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr)
{
	u32 nbytes;
	__be32 *p;

	nbytes = 6 * 4;
	if (attr->ia_valid & ATTR_MODE)
		nbytes += 4;
	if (attr->ia_valid & ATTR_UID)
		nbytes += 4;
	if (attr->ia_valid & ATTR_GID)
		nbytes += 4;
	if (attr->ia_valid & ATTR_SIZE)
		nbytes += 8;
	if (attr->ia_valid & ATTR_ATIME_SET)
		nbytes += 8;
	if (attr->ia_valid & ATTR_MTIME_SET)
		nbytes += 8;
	p = xdr_reserve_space(xdr, nbytes);

	if (attr->ia_valid & ATTR_MODE) {
		*p++ = xdr_one;
		*p++ = cpu_to_be32(attr->ia_mode & S_IALLUGO);
	} else
		*p++ = xdr_zero;

	if (attr->ia_valid & ATTR_UID) {
		*p++ = xdr_one;
		*p++ = cpu_to_be32(attr->ia_uid);
	} else
		*p++ = xdr_zero;

	if (attr->ia_valid & ATTR_GID) {
		*p++ = xdr_one;
		*p++ = cpu_to_be32(attr->ia_gid);
	} else
		*p++ = xdr_zero;

	if (attr->ia_valid & ATTR_SIZE) {
		*p++ = xdr_one;
		p = xdr_encode_hyper(p, (u64)attr->ia_size);
	} else
		*p++ = xdr_zero;

	if (attr->ia_valid & ATTR_ATIME_SET) {
		*p++ = xdr_two;
		p = xdr_encode_nfstime3(p, &attr->ia_atime);
	} else if (attr->ia_valid & ATTR_ATIME) {
		*p++ = xdr_one;
	} else
		*p++ = xdr_zero;

	if (attr->ia_valid & ATTR_MTIME_SET) {
		*p++ = xdr_two;
		xdr_encode_nfstime3(p, &attr->ia_mtime);
	} else if (attr->ia_valid & ATTR_MTIME) {
		*p = xdr_one;
	} else
		*p = xdr_zero;
}

/*
 *	struct nlm4_lock {
 *		string	caller_name<LM_MAXSTRLEN>;
 *		netobj	fh;
 *		netobj	oh;
 *		int32	svid;
 *		uint64	l_offset;
 *		uint64	l_len;
 *	};
 */
static void encode_nlm4_lock(struct xdr_stream *xdr,
			     const struct nlm_lock *lock)
{
	u64 l_offset, l_len;
	__be32 *p;

	encode_caller_name(xdr, lock->caller);
	encode_fh(xdr, &lock->fh);
	encode_netobj(xdr, lock->oh.data, lock->oh.len);

	p = xdr_reserve_space(xdr, 4 + 8 + 8);
	*p++ = cpu_to_be32(lock->svid);

	nlm4_compute_offsets(lock, &l_offset, &l_len);
	p = xdr_encode_hyper(p, l_offset);
	xdr_encode_hyper(p, l_len);
}

static inline u32 *
encode_fattr3(struct svc_rqst *rqstp, u32 *p, struct svc_fh *fhp)
{
	struct inode	*inode = fhp->fh_dentry->d_inode;

	*p++ = htonl(nfs3_ftypes[(inode->i_mode & S_IFMT) >> 12]);
	*p++ = htonl((u32) inode->i_mode);
	*p++ = htonl((u32) inode->i_nlink);
	*p++ = htonl((u32) nfsd_ruid(rqstp, inode->i_uid));
	*p++ = htonl((u32) nfsd_rgid(rqstp, inode->i_gid));
	if (S_ISLNK(inode->i_mode) && inode->i_size > NFS3_MAXPATHLEN) {
		p = xdr_encode_hyper(p, (u64) NFS3_MAXPATHLEN);
	} else {
		p = xdr_encode_hyper(p, (u64) inode->i_size);
	}
	if (inode->i_blksize == 0 && inode->i_blocks == 0)
		/* Minix file system(?) i_size is (hopefully) close enough */
		p = xdr_encode_hyper(p, (u64)(inode->i_size +511)& ~511);
	else
		p = xdr_encode_hyper(p, ((u64)inode->i_blocks) << 9);
	*p++ = htonl((u32) MAJOR(inode->i_rdev));
	*p++ = htonl((u32) MINOR(inode->i_rdev));
	if (rqstp->rq_reffh->fh_version == 1
	    && rqstp->rq_reffh->fh_fsid_type == 1
	    && (fhp->fh_export->ex_flags & NFSEXP_FSID))
		p = xdr_encode_hyper(p, (u64) fhp->fh_export->ex_fsid);
	else
		p = xdr_encode_hyper(p, (u64) inode->i_dev);
	p = xdr_encode_hyper(p, (u64) inode->i_ino);
	p = encode_time3(p, inode->i_atime);
	p = encode_time3(p, lease_get_mtime(inode));
	p = encode_time3(p, inode->i_ctime);

	return p;
}

void svc_rdma_xdr_encode_array_chunk(struct rpcrdma_write_array *ary,
				     int chunk_no,
				     u32 rs_handle, u64 rs_offset,
				     u32 write_len)
{
	struct rpcrdma_segment *seg = &ary->wc_array[chunk_no].wc_target;
	seg->rs_handle = htonl(rs_handle);
	seg->rs_length = htonl(write_len);
	xdr_encode_hyper((u32 *) &seg->rs_offset, rs_offset);
}

static __be32 *encode_fsid(__be32 *p, struct svc_fh *fhp)
{
	u64 f;
	switch(fsid_source(fhp)) {
	default:
	case FSIDSOURCE_DEV:
		p = xdr_encode_hyper(p, (u64)huge_encode_dev
				     (fhp->fh_dentry->d_inode->i_sb->s_dev));
		break;
	case FSIDSOURCE_FSID:
		p = xdr_encode_hyper(p, (u64) fhp->fh_export->ex_fsid);
		break;
	case FSIDSOURCE_UUID:
		f = ((u64*)fhp->fh_export->ex_uuid)[0];
		f ^= ((u64*)fhp->fh_export->ex_uuid)[1];
		p = xdr_encode_hyper(p, f);
		break;
	}
	return p;
}

static void encode_commit3args(struct xdr_stream *xdr,
			       const struct nfs_writeargs *args)
{
	__be32 *p;

	encode_nfs_fh3(xdr, args->fh);

	p = xdr_reserve_space(xdr, 8 + 4);
	p = xdr_encode_hyper(p, args->offset);
	*p = cpu_to_be32(args->count);
}