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fs/nfsd/flexfilelayoutxdr.c
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nfsd: Add a super...
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/*
* 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,
struct nfsd4_layoutget *lgp)
{
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 + 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));
/* 8 + len for recording the length, name, and padding */
ds_len = 20 + sizeof(stateid_opaque_t) + 4 + fh_len +
8 + uid.len + 8 + gid.len;
mirror_len = 4 + ds_len;
/* The layout segment */
len = 20 + 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 = xdr_encode_opaque_fixed(p, &fl->deviceid,
sizeof(struct nfsd4_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,
struct nfsd4_getdeviceinfo *gdp)
{
struct pnfs_ff_device_addr *da = gdp->gd_device;
int len;
int ver_len;
int addr_len;
__be32 *p;
/* len + padding for two strings */
addr_len = 16 + da->netaddr.netid_len + 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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