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 struct nfsd4_layoutget *lgp) 21 { 22 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 + 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 /* 8 + len for recording the length, name, and padding */ 39 ds_len = 20 + sizeof(stateid_opaque_t) + 4 + fh_len + 40 8 + uid.len + 8 + gid.len; 41 42 mirror_len = 4 + ds_len; 43 44 /* The layout segment */ 45 len = 20 + mirror_len; 46 47 p = xdr_reserve_space(xdr, sizeof(__be32) + len); 48 if (!p) 49 return nfserr_toosmall; 50 51 *p++ = cpu_to_be32(len); 52 p = xdr_encode_hyper(p, 0); /* stripe unit of 1 */ 53 54 *p++ = cpu_to_be32(1); /* single mirror */ 55 *p++ = cpu_to_be32(1); /* single data server */ 56 57 p = xdr_encode_opaque_fixed(p, &fl->deviceid, 58 sizeof(struct nfsd4_deviceid)); 59 60 *p++ = cpu_to_be32(1); /* efficiency */ 61 62 *p++ = cpu_to_be32(fl->stateid.si_generation); 63 p = xdr_encode_opaque_fixed(p, &fl->stateid.si_opaque, 64 sizeof(stateid_opaque_t)); 65 66 *p++ = cpu_to_be32(1); /* single file handle */ 67 p = xdr_encode_opaque(p, fl->fh.data, fl->fh.size); 68 69 p = xdr_encode_opaque(p, uid.buf, uid.len); 70 p = xdr_encode_opaque(p, gid.buf, gid.len); 71 72 *p++ = cpu_to_be32(fl->flags); 73 *p++ = cpu_to_be32(0); /* No stats collect hint */ 74 75 return 0; 76 } 77 78 __be32 79 nfsd4_ff_encode_getdeviceinfo(struct xdr_stream *xdr, 80 struct nfsd4_getdeviceinfo *gdp) 81 { 82 struct pnfs_ff_device_addr *da = gdp->gd_device; 83 int len; 84 int ver_len; 85 int addr_len; 86 __be32 *p; 87 88 /* 89 * See paragraph 5 of RFC 8881 S18.40.3. 90 */ 91 if (!gdp->gd_maxcount) { 92 if (xdr_stream_encode_u32(xdr, 0) != XDR_UNIT) 93 return nfserr_resource; 94 return nfs_ok; 95 } 96 97 /* len + padding for two strings */ 98 addr_len = 16 + da->netaddr.netid_len + da->netaddr.addr_len; 99 ver_len = 20; 100 101 len = 4 + ver_len + 4 + addr_len; 102 103 p = xdr_reserve_space(xdr, len + sizeof(__be32)); 104 if (!p) 105 return nfserr_resource; 106 107 /* 108 * Fill in the overall length and number of volumes at the beginning 109 * of the layout. 110 */ 111 *p++ = cpu_to_be32(len); 112 *p++ = cpu_to_be32(1); /* 1 netaddr */ 113 p = xdr_encode_opaque(p, da->netaddr.netid, da->netaddr.netid_len); 114 p = xdr_encode_opaque(p, da->netaddr.addr, da->netaddr.addr_len); 115 116 *p++ = cpu_to_be32(1); /* 1 versions */ 117 118 *p++ = cpu_to_be32(da->version); 119 *p++ = cpu_to_be32(da->minor_version); 120 *p++ = cpu_to_be32(da->rsize); 121 *p++ = cpu_to_be32(da->wsize); 122 *p++ = cpu_to_be32(da->tightly_coupled); 123 124 return 0; 125 } 126