1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2016 Tom Haynes <loghyr@primarydata.com> 4 */ 5 #include <linux/sunrpc/svc.h> 6 #include <linux/nfs4.h> 7 8 #include "nfsd.h" 9 #include "flexfilelayoutxdr.h" 10 11 #define NFSDDBG_FACILITY NFSDDBG_PNFS 12 13 struct ff_idmap { 14 char buf[11]; 15 int len; 16 }; 17 18 __be32 19 nfsd4_ff_encode_layoutget(struct xdr_stream *xdr, 20 const struct nfsd4_layoutget *lgp) 21 { 22 const struct pnfs_ff_layout *fl = lgp->lg_content; 23 int len, mirror_len, ds_len, fh_len; 24 __be32 *p; 25 26 /* 27 * Unlike nfsd4_encode_user, we know these will 28 * always be stringified. 29 */ 30 struct ff_idmap uid; 31 struct ff_idmap gid; 32 33 fh_len = 4 + xdr_align_size(fl->fh.size); 34 35 uid.len = sprintf(uid.buf, "%u", from_kuid(&init_user_ns, fl->uid)); 36 gid.len = sprintf(gid.buf, "%u", from_kgid(&init_user_ns, fl->gid)); 37 38 /* data server entry: deviceid + efficiency + stateid + fh list + 39 * user + group + flags + stats_collect_hint 40 */ 41 ds_len = 16 + 4 + 4 + sizeof(stateid_opaque_t) + 4 + fh_len + 42 4 + xdr_align_size(uid.len) + 43 4 + xdr_align_size(gid.len) + 44 4 + 4; 45 46 /* mirror: ds_count + ds */ 47 mirror_len = 4 + ds_len; 48 49 /* stripe_unit + mirror_count + mirror */ 50 len = 12 + mirror_len; 51 52 p = xdr_reserve_space(xdr, sizeof(__be32) + len); 53 if (!p) 54 return nfserr_toosmall; 55 56 *p++ = cpu_to_be32(len); 57 p = xdr_encode_hyper(p, 0); /* stripe unit of 1 */ 58 59 *p++ = cpu_to_be32(1); /* single mirror */ 60 *p++ = cpu_to_be32(1); /* single data server */ 61 62 p = svcxdr_encode_deviceid4(p, &fl->deviceid); 63 64 *p++ = cpu_to_be32(1); /* efficiency */ 65 66 *p++ = cpu_to_be32(fl->stateid.si_generation); 67 p = xdr_encode_opaque_fixed(p, &fl->stateid.si_opaque, 68 sizeof(stateid_opaque_t)); 69 70 *p++ = cpu_to_be32(1); /* single file handle */ 71 p = xdr_encode_opaque(p, fl->fh.data, fl->fh.size); 72 73 p = xdr_encode_opaque(p, uid.buf, uid.len); 74 p = xdr_encode_opaque(p, gid.buf, gid.len); 75 76 *p++ = cpu_to_be32(fl->flags); 77 *p++ = cpu_to_be32(0); /* No stats collect hint */ 78 79 return 0; 80 } 81 82 __be32 83 nfsd4_ff_encode_getdeviceinfo(struct xdr_stream *xdr, 84 const struct nfsd4_getdeviceinfo *gdp) 85 { 86 struct pnfs_ff_device_addr *da = gdp->gd_device; 87 int len; 88 int ver_len; 89 int addr_len; 90 __be32 *p; 91 92 /* 93 * See paragraph 5 of RFC 8881 S18.40.3. 94 */ 95 if (!gdp->gd_maxcount) { 96 if (xdr_stream_encode_u32(xdr, 0) != XDR_UNIT) 97 return nfserr_resource; 98 return nfs_ok; 99 } 100 101 /* len + padding for two strings */ 102 addr_len = 8 + xdr_align_size(da->netaddr.netid_len) + 103 xdr_align_size(da->netaddr.addr_len); 104 ver_len = 20; 105 106 len = 4 + ver_len + 4 + addr_len; 107 108 p = xdr_reserve_space(xdr, len + sizeof(__be32)); 109 if (!p) 110 return nfserr_resource; 111 112 /* 113 * Fill in the overall length and number of volumes at the beginning 114 * of the layout. 115 */ 116 *p++ = cpu_to_be32(len); 117 *p++ = cpu_to_be32(1); /* 1 netaddr */ 118 p = xdr_encode_opaque(p, da->netaddr.netid, da->netaddr.netid_len); 119 p = xdr_encode_opaque(p, da->netaddr.addr, da->netaddr.addr_len); 120 121 *p++ = cpu_to_be32(1); /* 1 versions */ 122 123 *p++ = cpu_to_be32(da->version); 124 *p++ = cpu_to_be32(da->minor_version); 125 *p++ = cpu_to_be32(da->rsize); 126 *p++ = cpu_to_be32(da->wsize); 127 *p++ = cpu_to_be32(da->tightly_coupled); 128 129 return 0; 130 } 131