1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (c) 2016 Tom Haynes <loghyr@primarydata.com>
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun #include <linux/sunrpc/svc.h>
6*4882a593Smuzhiyun #include <linux/nfs4.h>
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include "nfsd.h"
9*4882a593Smuzhiyun #include "flexfilelayoutxdr.h"
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #define NFSDDBG_FACILITY NFSDDBG_PNFS
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun struct ff_idmap {
14*4882a593Smuzhiyun char buf[11];
15*4882a593Smuzhiyun int len;
16*4882a593Smuzhiyun };
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun __be32
nfsd4_ff_encode_layoutget(struct xdr_stream * xdr,struct nfsd4_layoutget * lgp)19*4882a593Smuzhiyun nfsd4_ff_encode_layoutget(struct xdr_stream *xdr,
20*4882a593Smuzhiyun struct nfsd4_layoutget *lgp)
21*4882a593Smuzhiyun {
22*4882a593Smuzhiyun struct pnfs_ff_layout *fl = lgp->lg_content;
23*4882a593Smuzhiyun int len, mirror_len, ds_len, fh_len;
24*4882a593Smuzhiyun __be32 *p;
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun /*
27*4882a593Smuzhiyun * Unlike nfsd4_encode_user, we know these will
28*4882a593Smuzhiyun * always be stringified.
29*4882a593Smuzhiyun */
30*4882a593Smuzhiyun struct ff_idmap uid;
31*4882a593Smuzhiyun struct ff_idmap gid;
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun fh_len = 4 + fl->fh.size;
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun uid.len = sprintf(uid.buf, "%u", from_kuid(&init_user_ns, fl->uid));
36*4882a593Smuzhiyun gid.len = sprintf(gid.buf, "%u", from_kgid(&init_user_ns, fl->gid));
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun /* 8 + len for recording the length, name, and padding */
39*4882a593Smuzhiyun ds_len = 20 + sizeof(stateid_opaque_t) + 4 + fh_len +
40*4882a593Smuzhiyun 8 + uid.len + 8 + gid.len;
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun mirror_len = 4 + ds_len;
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun /* The layout segment */
45*4882a593Smuzhiyun len = 20 + mirror_len;
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun p = xdr_reserve_space(xdr, sizeof(__be32) + len);
48*4882a593Smuzhiyun if (!p)
49*4882a593Smuzhiyun return nfserr_toosmall;
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun *p++ = cpu_to_be32(len);
52*4882a593Smuzhiyun p = xdr_encode_hyper(p, 0); /* stripe unit of 1 */
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun *p++ = cpu_to_be32(1); /* single mirror */
55*4882a593Smuzhiyun *p++ = cpu_to_be32(1); /* single data server */
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun p = xdr_encode_opaque_fixed(p, &fl->deviceid,
58*4882a593Smuzhiyun sizeof(struct nfsd4_deviceid));
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun *p++ = cpu_to_be32(1); /* efficiency */
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun *p++ = cpu_to_be32(fl->stateid.si_generation);
63*4882a593Smuzhiyun p = xdr_encode_opaque_fixed(p, &fl->stateid.si_opaque,
64*4882a593Smuzhiyun sizeof(stateid_opaque_t));
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun *p++ = cpu_to_be32(1); /* single file handle */
67*4882a593Smuzhiyun p = xdr_encode_opaque(p, fl->fh.data, fl->fh.size);
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun p = xdr_encode_opaque(p, uid.buf, uid.len);
70*4882a593Smuzhiyun p = xdr_encode_opaque(p, gid.buf, gid.len);
71*4882a593Smuzhiyun
72*4882a593Smuzhiyun *p++ = cpu_to_be32(fl->flags);
73*4882a593Smuzhiyun *p++ = cpu_to_be32(0); /* No stats collect hint */
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun return 0;
76*4882a593Smuzhiyun }
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun __be32
nfsd4_ff_encode_getdeviceinfo(struct xdr_stream * xdr,struct nfsd4_getdeviceinfo * gdp)79*4882a593Smuzhiyun nfsd4_ff_encode_getdeviceinfo(struct xdr_stream *xdr,
80*4882a593Smuzhiyun struct nfsd4_getdeviceinfo *gdp)
81*4882a593Smuzhiyun {
82*4882a593Smuzhiyun struct pnfs_ff_device_addr *da = gdp->gd_device;
83*4882a593Smuzhiyun int len;
84*4882a593Smuzhiyun int ver_len;
85*4882a593Smuzhiyun int addr_len;
86*4882a593Smuzhiyun __be32 *p;
87*4882a593Smuzhiyun
88*4882a593Smuzhiyun /* len + padding for two strings */
89*4882a593Smuzhiyun addr_len = 16 + da->netaddr.netid_len + da->netaddr.addr_len;
90*4882a593Smuzhiyun ver_len = 20;
91*4882a593Smuzhiyun
92*4882a593Smuzhiyun len = 4 + ver_len + 4 + addr_len;
93*4882a593Smuzhiyun
94*4882a593Smuzhiyun p = xdr_reserve_space(xdr, len + sizeof(__be32));
95*4882a593Smuzhiyun if (!p)
96*4882a593Smuzhiyun return nfserr_resource;
97*4882a593Smuzhiyun
98*4882a593Smuzhiyun /*
99*4882a593Smuzhiyun * Fill in the overall length and number of volumes at the beginning
100*4882a593Smuzhiyun * of the layout.
101*4882a593Smuzhiyun */
102*4882a593Smuzhiyun *p++ = cpu_to_be32(len);
103*4882a593Smuzhiyun *p++ = cpu_to_be32(1); /* 1 netaddr */
104*4882a593Smuzhiyun p = xdr_encode_opaque(p, da->netaddr.netid, da->netaddr.netid_len);
105*4882a593Smuzhiyun p = xdr_encode_opaque(p, da->netaddr.addr, da->netaddr.addr_len);
106*4882a593Smuzhiyun
107*4882a593Smuzhiyun *p++ = cpu_to_be32(1); /* 1 versions */
108*4882a593Smuzhiyun
109*4882a593Smuzhiyun *p++ = cpu_to_be32(da->version);
110*4882a593Smuzhiyun *p++ = cpu_to_be32(da->minor_version);
111*4882a593Smuzhiyun *p++ = cpu_to_be32(da->rsize);
112*4882a593Smuzhiyun *p++ = cpu_to_be32(da->wsize);
113*4882a593Smuzhiyun *p++ = cpu_to_be32(da->tightly_coupled);
114*4882a593Smuzhiyun
115*4882a593Smuzhiyun return 0;
116*4882a593Smuzhiyun }
117