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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2016 Tom Haynes <loghyr@primarydata.com>
*/
#include <linux/sunrpc/svc.h>
#include <linux/nfs4.h>
#include "nfsd.h"
#include "flexfilelayoutxdr.h"
#define NFSDDBG_FACILITY NFSDDBG_PNFS
struct ff_idmap {
char buf[11];
int len;
};
__be32
nfsd4_ff_encode_layoutget(struct xdr_stream *xdr,
const struct nfsd4_layoutget *lgp)
{
const struct pnfs_ff_layout *fl = lgp->lg_content;
int len, mirror_len, ds_len, fh_len;
__be32 *p;
/*
* Unlike nfsd4_encode_user, we know these will
* always be stringified.
*/
struct ff_idmap uid;
struct ff_idmap gid;
fh_len = 4 + xdr_align_size(fl->fh.size);
uid.len = sprintf(uid.buf, "%u", from_kuid(&init_user_ns, fl->uid));
gid.len = sprintf(gid.buf, "%u", from_kgid(&init_user_ns, fl->gid));
/* data server entry: deviceid + efficiency + stateid + fh list +
* user + group + flags + stats_collect_hint
*/
ds_len = 16 + 4 + 4 + sizeof(stateid_opaque_t) + 4 + fh_len +
4 + xdr_align_size(uid.len) +
4 + xdr_align_size(gid.len) +
4 + 4;
/* mirror: ds_count + ds */
mirror_len = 4 + ds_len;
/* stripe_unit + mirror_count + mirror */
len = 12 + mirror_len;
p = xdr_reserve_space(xdr, sizeof(__be32) + len);
if (!p)
return nfserr_toosmall;
*p++ = cpu_to_be32(len);
p = xdr_encode_hyper(p, 0); /* stripe unit of 1 */
*p++ = cpu_to_be32(1); /* single mirror */
*p++ = cpu_to_be32(1); /* single data server */
p = svcxdr_encode_deviceid4(p, &fl->deviceid);
*p++ = cpu_to_be32(1); /* efficiency */
*p++ = cpu_to_be32(fl->stateid.si_generation);
p = xdr_encode_opaque_fixed(p, &fl->stateid.si_opaque,
sizeof(stateid_opaque_t));
*p++ = cpu_to_be32(1); /* single file handle */
p = xdr_encode_opaque(p, fl->fh.data, fl->fh.size);
p = xdr_encode_opaque(p, uid.buf, uid.len);
p = xdr_encode_opaque(p, gid.buf, gid.len);
*p++ = cpu_to_be32(fl->flags);
*p++ = cpu_to_be32(0); /* No stats collect hint */
return 0;
}
__be32
nfsd4_ff_encode_getdeviceinfo(struct xdr_stream *xdr,
const struct nfsd4_getdeviceinfo *gdp)
{
struct pnfs_ff_device_addr *da = gdp->gd_device;
int len;
int ver_len;
int addr_len;
__be32 *p;
/*
* See paragraph 5 of RFC 8881 S18.40.3.
*/
if (!gdp->gd_maxcount) {
if (xdr_stream_encode_u32(xdr, 0) != XDR_UNIT)
return nfserr_resource;
return nfs_ok;
}
/* len + padding for two strings */
addr_len = 8 + xdr_align_size(da->netaddr.netid_len) +
xdr_align_size(da->netaddr.addr_len);
ver_len = 20;
len = 4 + ver_len + 4 + addr_len;
p = xdr_reserve_space(xdr, len + sizeof(__be32));
if (!p)
return nfserr_resource;
/*
* Fill in the overall length and number of volumes at the beginning
* of the layout.
*/
*p++ = cpu_to_be32(len);
*p++ = cpu_to_be32(1); /* 1 netaddr */
p = xdr_encode_opaque(p, da->netaddr.netid, da->netaddr.netid_len);
p = xdr_encode_opaque(p, da->netaddr.addr, da->netaddr.addr_len);
*p++ = cpu_to_be32(1); /* 1 versions */
*p++ = cpu_to_be32(da->version);
*p++ = cpu_to_be32(da->minor_version);
*p++ = cpu_to_be32(da->rsize);
*p++ = cpu_to_be32(da->wsize);
*p++ = cpu_to_be32(da->tightly_coupled);
return 0;
}
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