nfs4xdr.c

	return ret;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
{
	__be32 *p;
	int ret = 0;

	*change = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
		xdr_decode_hyper(p, change);
		bitmap[0] &= ~FATTR4_WORD0_CHANGE;
		ret = NFS_ATTR_FATTR_CHANGE;
	}
	dprintk("%s: change attribute=%Lu\n", __func__,
			(unsigned long long)*change);
	return ret;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
{
	__be32 *p;
	int ret = 0;

	*size = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
		xdr_decode_hyper(p, size);
		bitmap[0] &= ~FATTR4_WORD0_SIZE;
		ret = NFS_ATTR_FATTR_SIZE;
	}
	dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
	return ret;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
	__be32 *p;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		*res = be32_to_cpup(p);
		bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
	}
	dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
	__be32 *p;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		*res = be32_to_cpup(p);
		bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
	}
	dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
{
	__be32 *p;
	int ret = 0;

	fsid->major = 0;
	fsid->minor = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
		p = xdr_inline_decode(xdr, 16);
		if (unlikely(!p))
			goto out_overflow;
		p = xdr_decode_hyper(p, &fsid->major);
		xdr_decode_hyper(p, &fsid->minor);
		bitmap[0] &= ~FATTR4_WORD0_FSID;
		ret = NFS_ATTR_FATTR_FSID;
	}
	dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
			(unsigned long long)fsid->major,
			(unsigned long long)fsid->minor);
	return ret;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
	__be32 *p;

	*res = 60;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		*res = be32_to_cpup(p);
		bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
	}
	dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
{
	__be32 *p;

	if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
		*res = -be32_to_cpup(p);
	}
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
{
	__be32 *p;
	int len;

	if (fh != NULL)
		memset(fh, 0, sizeof(*fh));

	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		len = be32_to_cpup(p);
		if (len > NFS4_FHSIZE)
			return -EIO;
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
		if (fh != NULL) {
			memcpy(fh->data, p, len);
			fh->size = len;
		}
		bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
	}
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
	__be32 *p;

	*res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		*res = be32_to_cpup(p);
		bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
	}
	dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
	__be32 *p;
	int ret = 0;

	*fileid = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
		xdr_decode_hyper(p, fileid);
		bitmap[0] &= ~FATTR4_WORD0_FILEID;
		ret = NFS_ATTR_FATTR_FILEID;
	}
	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
	return ret;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
	__be32 *p;
	int ret = 0;

	*fileid = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
		xdr_decode_hyper(p, fileid);
		bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
		ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
	}
	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
	return ret;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
	__be32 *p;
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
		xdr_decode_hyper(p, res);
		bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
	}
	dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
	return status;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
	__be32 *p;
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
		xdr_decode_hyper(p, res);
		bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
	}
	dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
	return status;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
	__be32 *p;
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
		xdr_decode_hyper(p, res);
		bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
	}
	dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
	return status;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
{
	u32 n;
	__be32 *p;
	int status = 0;

	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
	n = be32_to_cpup(p);
	if (n == 0)
		goto root_path;
	dprintk("path ");
	path->ncomponents = 0;
	while (path->ncomponents < n) {
		struct nfs4_string *component = &path->components[path->ncomponents];
		status = decode_opaque_inline(xdr, &component->len, &component->data);
		if (unlikely(status != 0))
			goto out_eio;
		if (path->ncomponents != n)
			dprintk("/");
		dprintk("%s", component->data);
		if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
			path->ncomponents++;
		else {
			dprintk("cannot parse %d components in path\n", n);
			goto out_eio;
		}
	}
out:
	dprintk("\n");
	return status;
root_path:
/* a root pathname is sent as a zero component4 */
	path->ncomponents = 1;
	path->components[0].len=0;
	path->components[0].data=NULL;
	dprintk("path /\n");
	goto out;
out_eio:
	dprintk(" status %d", status);
	status = -EIO;
	goto out;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
{
	int n;
	__be32 *p;
	int status = -EIO;

	if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
		goto out;
	status = 0;
	if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
		goto out;
	dprintk("%s: fsroot ", __func__);
	status = decode_pathname(xdr, &res->fs_path);
	if (unlikely(status != 0))
		goto out;
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
	n = be32_to_cpup(p);
	if (n <= 0)
		goto out_eio;
	res->nlocations = 0;
	while (res->nlocations < n) {
		u32 m;
		struct nfs4_fs_location *loc = &res->locations[res->nlocations];

		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		m = be32_to_cpup(p);

		loc->nservers = 0;
		dprintk("%s: servers ", __func__);
		while (loc->nservers < m) {
			struct nfs4_string *server = &loc->servers[loc->nservers];
			status = decode_opaque_inline(xdr, &server->len, &server->data);
			if (unlikely(status != 0))
				goto out_eio;
			dprintk("%s ", server->data);
			if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
				loc->nservers++;
			else {
				unsigned int i;
				dprintk("%s: using first %u of %u servers "
					"returned for location %u\n",
						__func__,
						NFS4_FS_LOCATION_MAXSERVERS,
						m, res->nlocations);
				for (i = loc->nservers; i < m; i++) {
					unsigned int len;
					char *data;
					status = decode_opaque_inline(xdr, &len, &data);
					if (unlikely(status != 0))
						goto out_eio;
				}
			}
		}
		status = decode_pathname(xdr, &loc->rootpath);
		if (unlikely(status != 0))
			goto out_eio;
		if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
			res->nlocations++;
	}
	if (res->nlocations != 0)
		status = NFS_ATTR_FATTR_V4_REFERRAL;
out:
	dprintk("%s: fs_locations done, error = %d\n", __func__, status);
	return status;
out_overflow:
	print_overflow_msg(__func__, xdr);
out_eio:
	status = -EIO;
	goto out;
}

static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
	__be32 *p;
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
		xdr_decode_hyper(p, res);
		bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
	}
	dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
	return status;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
{
	__be32 *p;
	int status = 0;

	*maxlink = 1;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		*maxlink = be32_to_cpup(p);
		bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
	}
	dprintk("%s: maxlink=%u\n", __func__, *maxlink);
	return status;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
{
	__be32 *p;
	int status = 0;

	*maxname = 1024;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		*maxname = be32_to_cpup(p);
		bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
	}
	dprintk("%s: maxname=%u\n", __func__, *maxname);
	return status;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
	__be32 *p;
	int status = 0;

	*res = 1024;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
		uint64_t maxread;
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
		xdr_decode_hyper(p, &maxread);
		if (maxread > 0x7FFFFFFF)
			maxread = 0x7FFFFFFF;
		*res = (uint32_t)maxread;
		bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
	}
	dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
	return status;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
	__be32 *p;
	int status = 0;

	*res = 1024;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
		uint64_t maxwrite;
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
		xdr_decode_hyper(p, &maxwrite);
		if (maxwrite > 0x7FFFFFFF)
			maxwrite = 0x7FFFFFFF;
		*res = (uint32_t)maxwrite;
		bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
	}
	dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
	return status;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
{
	uint32_t tmp;
	__be32 *p;
	int ret = 0;

	*mode = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		tmp = be32_to_cpup(p);
		*mode = tmp & ~S_IFMT;
		bitmap[1] &= ~FATTR4_WORD1_MODE;
		ret = NFS_ATTR_FATTR_MODE;
	}
	dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
	return ret;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
{
	__be32 *p;
	int ret = 0;

	*nlink = 1;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		*nlink = be32_to_cpup(p);
		bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
		ret = NFS_ATTR_FATTR_NLINK;
	}
	dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
	return ret;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
		const struct nfs_server *server, uint32_t *uid, int may_sleep)
{
	uint32_t len;
	__be32 *p;
	int ret = 0;

	*uid = -2;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		len = be32_to_cpup(p);
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
		if (!may_sleep) {
			/* do nothing */
		} else if (len < XDR_MAX_NETOBJ) {
			if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
				ret = NFS_ATTR_FATTR_OWNER;
			else
				dprintk("%s: nfs_map_name_to_uid failed!\n",
						__func__);
		} else
			dprintk("%s: name too long (%u)!\n",
					__func__, len);
		bitmap[1] &= ~FATTR4_WORD1_OWNER;
	}
	dprintk("%s: uid=%d\n", __func__, (int)*uid);
	return ret;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
		const struct nfs_server *server, uint32_t *gid, int may_sleep)
{
	uint32_t len;
	__be32 *p;
	int ret = 0;

	*gid = -2;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		len = be32_to_cpup(p);
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
		if (!may_sleep) {
			/* do nothing */
		} else if (len < XDR_MAX_NETOBJ) {
			if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
				ret = NFS_ATTR_FATTR_GROUP;
			else
				dprintk("%s: nfs_map_group_to_gid failed!\n",
						__func__);
		} else
			dprintk("%s: name too long (%u)!\n",
					__func__, len);
		bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
	}
	dprintk("%s: gid=%d\n", __func__, (int)*gid);
	return ret;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
{
	uint32_t major = 0, minor = 0;
	__be32 *p;
	int ret = 0;

	*rdev = MKDEV(0,0);
	if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
		dev_t tmp;

		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
		major = be32_to_cpup(p++);
		minor = be32_to_cpup(p);
		tmp = MKDEV(major, minor);
		if (MAJOR(tmp) == major && MINOR(tmp) == minor)
			*rdev = tmp;
		bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
		ret = NFS_ATTR_FATTR_RDEV;
	}
	dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
	return ret;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
	__be32 *p;
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
		xdr_decode_hyper(p, res);
		bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
	}
	dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
	return status;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
	__be32 *p;
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
		xdr_decode_hyper(p, res);
		bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
	}
	dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
	return status;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
	__be32 *p;
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
		xdr_decode_hyper(p, res);
		bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
	}
	dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
	return status;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
{
	__be32 *p;
	int ret = 0;

	*used = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
		xdr_decode_hyper(p, used);
		bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
		ret = NFS_ATTR_FATTR_SPACE_USED;
	}
	dprintk("%s: space used=%Lu\n", __func__,
			(unsigned long long)*used);
	return ret;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
{
	__be32 *p;
	uint64_t sec;
	uint32_t nsec;

	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
	p = xdr_decode_hyper(p, &sec);
	nsec = be32_to_cpup(p);
	time->tv_sec = (time_t)sec;
	time->tv_nsec = (long)nsec;
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
{
	int status = 0;

	time->tv_sec = 0;
	time->tv_nsec = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
		status = decode_attr_time(xdr, time);
		if (status == 0)
			status = NFS_ATTR_FATTR_ATIME;
		bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
	}
	dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
	return status;
}

static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
{
	int status = 0;

	time->tv_sec = 0;
	time->tv_nsec = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
		status = decode_attr_time(xdr, time);
		if (status == 0)
			status = NFS_ATTR_FATTR_CTIME;
		bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
	}
	dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
	return status;
}

static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
				  struct timespec *time)
{
	int status = 0;

	time->tv_sec = 0;
	time->tv_nsec = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
		status = decode_attr_time(xdr, time);
		bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
	}
	dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
		(long)time->tv_nsec);
	return status;
}

static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
{
	int status = 0;

	time->tv_sec = 0;
	time->tv_nsec = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
		status = decode_attr_time(xdr, time);
		if (status == 0)
			status = NFS_ATTR_FATTR_MTIME;
		bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
	}
	dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
	return status;
}

static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
{
	unsigned int attrwords = XDR_QUADLEN(attrlen);
	unsigned int nwords = xdr->p - savep;

	if (unlikely(attrwords != nwords)) {
		dprintk("%s: server returned incorrect attribute length: "
			"%u %c %u\n",
				__func__,
				attrwords << 2,
				(attrwords < nwords) ? '<' : '>',
				nwords << 2);
		return -EIO;
	}
	return 0;
}

static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
	__be32 *p;

	p = xdr_inline_decode(xdr, 20);
	if (unlikely(!p))
		goto out_overflow;
	cinfo->atomic = be32_to_cpup(p++);
	p = xdr_decode_hyper(p, &cinfo->before);
	xdr_decode_hyper(p, &cinfo->after);
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
{
	__be32 *p;
	uint32_t supp, acc;
	int status;

	status = decode_op_hdr(xdr, OP_ACCESS);
	if (status)
		return status;
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
	supp = be32_to_cpup(p++);
	acc = be32_to_cpup(p);
	access->supported = supp;
	access->access = acc;
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
{
	__be32 *p;

	p = xdr_inline_decode(xdr, len);
	if (likely(p)) {
		memcpy(buf, p, len);
		return 0;
	}
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
{
	return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
}

static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
{
	int status;

	status = decode_op_hdr(xdr, OP_CLOSE);
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	return status;
}

static int decode_verifier(struct xdr_stream *xdr, void *verifier)
{
	return decode_opaque_fixed(xdr, verifier, 8);
}

static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
{
	int status;

	status = decode_op_hdr(xdr, OP_COMMIT);
	if (!status)
		status = decode_verifier(xdr, res->verf->verifier);