blob: 5e3fd7fc1a9fc4bf1aab9ea58b94a70305193f36 [file] [log] [blame]
Tom Haynes9b9960a2016-06-14 13:41:28 -07001/*
2 * Copyright (c) 2016 Tom Haynes <loghyr@primarydata.com>
3 */
4#include <linux/sunrpc/svc.h>
5#include <linux/nfs4.h>
6
7#include "nfsd.h"
8#include "flexfilelayoutxdr.h"
9
10#define NFSDDBG_FACILITY NFSDDBG_PNFS
11
12struct ff_idmap {
13 char buf[11];
14 int len;
15};
16
17__be32
18nfsd4_ff_encode_layoutget(struct xdr_stream *xdr,
19 struct nfsd4_layoutget *lgp)
20{
21 struct pnfs_ff_layout *fl = lgp->lg_content;
22 int len, mirror_len, ds_len, fh_len;
23 __be32 *p;
24
25 /*
26 * Unlike nfsd4_encode_user, we know these will
27 * always be stringified.
28 */
29 struct ff_idmap uid;
30 struct ff_idmap gid;
31
32 fh_len = 4 + fl->fh.size;
33
34 uid.len = sprintf(uid.buf, "%u", from_kuid(&init_user_ns, fl->uid));
35 gid.len = sprintf(gid.buf, "%u", from_kgid(&init_user_ns, fl->gid));
36
37 /* 8 + len for recording the length, name, and padding */
38 ds_len = 20 + sizeof(stateid_opaque_t) + 4 + fh_len +
39 8 + uid.len + 8 + gid.len;
40
41 mirror_len = 4 + ds_len;
42
43 /* The layout segment */
44 len = 20 + mirror_len;
45
46 p = xdr_reserve_space(xdr, sizeof(__be32) + len);
47 if (!p)
48 return nfserr_toosmall;
49
50 *p++ = cpu_to_be32(len);
51 p = xdr_encode_hyper(p, 0); /* stripe unit of 1 */
52
53 *p++ = cpu_to_be32(1); /* single mirror */
54 *p++ = cpu_to_be32(1); /* single data server */
55
56 p = xdr_encode_opaque_fixed(p, &fl->deviceid,
57 sizeof(struct nfsd4_deviceid));
58
59 *p++ = cpu_to_be32(1); /* efficiency */
60
61 *p++ = cpu_to_be32(fl->stateid.si_generation);
62 p = xdr_encode_opaque_fixed(p, &fl->stateid.si_opaque,
63 sizeof(stateid_opaque_t));
64
65 *p++ = cpu_to_be32(1); /* single file handle */
66 p = xdr_encode_opaque(p, fl->fh.data, fl->fh.size);
67
68 p = xdr_encode_opaque(p, uid.buf, uid.len);
69 p = xdr_encode_opaque(p, gid.buf, gid.len);
70
71 *p++ = cpu_to_be32(fl->flags);
72 *p++ = cpu_to_be32(0); /* No stats collect hint */
73
74 return 0;
75}
76
77__be32
78nfsd4_ff_encode_getdeviceinfo(struct xdr_stream *xdr,
79 struct nfsd4_getdeviceinfo *gdp)
80{
81 struct pnfs_ff_device_addr *da = gdp->gd_device;
82 int len;
83 int ver_len;
84 int addr_len;
85 __be32 *p;
86
87 /* len + padding for two strings */
88 addr_len = 16 + da->netaddr.netid_len + da->netaddr.addr_len;
89 ver_len = 20;
90
91 len = 4 + ver_len + 4 + addr_len;
92
93 p = xdr_reserve_space(xdr, len + sizeof(__be32));
94 if (!p)
95 return nfserr_resource;
96
97 /*
98 * Fill in the overall length and number of volumes at the beginning
99 * of the layout.
100 */
101 *p++ = cpu_to_be32(len);
102 *p++ = cpu_to_be32(1); /* 1 netaddr */
103 p = xdr_encode_opaque(p, da->netaddr.netid, da->netaddr.netid_len);
104 p = xdr_encode_opaque(p, da->netaddr.addr, da->netaddr.addr_len);
105
106 *p++ = cpu_to_be32(1); /* 1 versions */
107
108 *p++ = cpu_to_be32(da->version);
109 *p++ = cpu_to_be32(da->minor_version);
110 *p++ = cpu_to_be32(da->rsize);
111 *p++ = cpu_to_be32(da->wsize);
112 *p++ = cpu_to_be32(da->tightly_coupled);
113
114 return 0;
115}