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 + 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 = svcxdr_encode_deviceid4(p, &fl->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 78 nfsd4_ff_encode_getdeviceinfo(struct xdr_stream *xdr, 79 const 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 /* 88 * See paragraph 5 of RFC 8881 S18.40.3. 89 */ 90 if (!gdp->gd_maxcount) { 91 if (xdr_stream_encode_u32(xdr, 0) != XDR_UNIT) 92 return nfserr_resource; 93 return nfs_ok; 94 } 95 96 /* len + padding for two strings */ 97 addr_len = 16 + da->netaddr.netid_len + da->netaddr.addr_len; 98 ver_len = 20; 99 100 len = 4 + ver_len + 4 + addr_len; 101 102 p = xdr_reserve_space(xdr, len + sizeof(__be32)); 103 if (!p) 104 return nfserr_resource; 105 106 /* 107 * Fill in the overall length and number of volumes at the beginning 108 * of the layout. 109 */ 110 *p++ = cpu_to_be32(len); 111 *p++ = cpu_to_be32(1); /* 1 netaddr */ 112 p = xdr_encode_opaque(p, da->netaddr.netid, da->netaddr.netid_len); 113 p = xdr_encode_opaque(p, da->netaddr.addr, da->netaddr.addr_len); 114 115 *p++ = cpu_to_be32(1); /* 1 versions */ 116 117 *p++ = cpu_to_be32(da->version); 118 *p++ = cpu_to_be32(da->minor_version); 119 *p++ = cpu_to_be32(da->rsize); 120 *p++ = cpu_to_be32(da->wsize); 121 *p++ = cpu_to_be32(da->tightly_coupled); 122 123 return 0; 124 } 125