| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 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 | /* len + padding for two strings */ |
| 89 | addr_len = 16 + da->netaddr.netid_len + da->netaddr.addr_len; |
| 90 | ver_len = 20; |
| 91 | |
| 92 | len = 4 + ver_len + 4 + addr_len; |
| 93 | |
| 94 | p = xdr_reserve_space(xdr, len + sizeof(__be32)); |
| 95 | if (!p) |
| 96 | return nfserr_resource; |
| 97 | |
| 98 | /* |
| 99 | * Fill in the overall length and number of volumes at the beginning |
| 100 | * of the layout. |
| 101 | */ |
| 102 | *p++ = cpu_to_be32(len); |
| 103 | *p++ = cpu_to_be32(1); /* 1 netaddr */ |
| 104 | p = xdr_encode_opaque(p, da->netaddr.netid, da->netaddr.netid_len); |
| 105 | p = xdr_encode_opaque(p, da->netaddr.addr, da->netaddr.addr_len); |
| 106 | |
| 107 | *p++ = cpu_to_be32(1); /* 1 versions */ |
| 108 | |
| 109 | *p++ = cpu_to_be32(da->version); |
| 110 | *p++ = cpu_to_be32(da->minor_version); |
| 111 | *p++ = cpu_to_be32(da->rsize); |
| 112 | *p++ = cpu_to_be32(da->wsize); |
| 113 | *p++ = cpu_to_be32(da->tightly_coupled); |
| 114 | |
| 115 | return 0; |
| 116 | } |