Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Kendrick Smith <kmsmith@umich.edu> |
| 6 | * Andy Adamson <andros@umich.edu> |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer in the |
| 16 | * documentation and/or other materials provided with the distribution. |
| 17 | * 3. Neither the name of the University nor the names of its |
| 18 | * contributors may be used to endorse or promote products derived |
| 19 | * from this software without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 32 | */ |
| 33 | |
ChenXiaoSong | 52e8910 | 2023-12-02 21:07:25 +0000 | [diff] [blame] | 34 | #include <linux/nfs4.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/sunrpc/clnt.h> |
Kinglong Mee | d531c00 | 2014-03-24 11:59:46 +0800 | [diff] [blame] | 36 | #include <linux/sunrpc/xprt.h> |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 37 | #include <linux/sunrpc/svc_xprt.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 38 | #include <linux/slab.h> |
Boaz Harrosh | 9a74af2 | 2009-12-03 20:30:56 +0200 | [diff] [blame] | 39 | #include "nfsd.h" |
| 40 | #include "state.h" |
Stanislav Kinsbursky | 3d73371 | 2012-11-27 14:11:44 +0300 | [diff] [blame] | 41 | #include "netns.h" |
Chuck Lever | 1eace0d | 2020-04-05 14:15:29 -0400 | [diff] [blame] | 42 | #include "trace.h" |
J. Bruce Fields | 06b332a | 2013-04-09 11:34:36 -0400 | [diff] [blame] | 43 | #include "xdr4cb.h" |
Olga Kornievskaia | 9eb190fca8f | 2018-07-20 18:19:17 -0400 | [diff] [blame] | 44 | #include "xdr4.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
| 46 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
| 47 | |
Chuck Lever | 627fb18 | 2024-01-26 12:46:13 -0500 | [diff] [blame] | 48 | static void nfsd4_mark_cb_fault(struct nfs4_client *clp); |
Benny Halevy | 5423732 | 2011-10-19 19:12:58 -0700 | [diff] [blame] | 49 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #define NFSPROC4_CB_NULL 0 |
| 51 | #define NFSPROC4_CB_COMPOUND 1 |
| 52 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | /* Index of predefined Linux callback client operations */ |
| 54 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | struct nfs4_cb_compound_hdr { |
Andy Adamson | 38524ab | 2009-09-10 12:25:59 +0300 | [diff] [blame] | 56 | /* args */ |
| 57 | u32 ident; /* minorversion 0 only */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | u32 nops; |
Andy Adamson | ef52bff | 2009-06-16 04:20:50 +0300 | [diff] [blame] | 59 | __be32 *nops_p; |
Andy Adamson | ab52ae6 | 2009-06-16 04:20:53 +0300 | [diff] [blame] | 60 | u32 minorversion; |
Andy Adamson | 38524ab | 2009-09-10 12:25:59 +0300 | [diff] [blame] | 61 | /* res */ |
| 62 | int status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | }; |
| 64 | |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 65 | static __be32 *xdr_encode_empty_array(__be32 *p) |
| 66 | { |
| 67 | *p++ = xdr_zero; |
| 68 | return p; |
| 69 | } |
| 70 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | /* |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 72 | * Encode/decode NFSv4 CB basic data types |
| 73 | * |
| 74 | * Basic NFSv4 callback data types are defined in section 15 of RFC |
| 75 | * 3530: "Network File System (NFS) version 4 Protocol" and section |
| 76 | * 20 of RFC 5661: "Network File System (NFS) Version 4 Minor Version |
| 77 | * 1 Protocol" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | */ |
| 79 | |
Dai Ngo | 3959066 | 2022-11-16 19:44:46 -0800 | [diff] [blame] | 80 | static void encode_uint32(struct xdr_stream *xdr, u32 n) |
| 81 | { |
| 82 | WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0); |
| 83 | } |
| 84 | |
| 85 | static void encode_bitmap4(struct xdr_stream *xdr, const __u32 *bitmap, |
| 86 | size_t len) |
| 87 | { |
Dai Ngo | 6487a13 | 2024-02-15 14:05:21 -0800 | [diff] [blame] | 88 | xdr_stream_encode_uint32_array(xdr, bitmap, len); |
| 89 | } |
| 90 | |
| 91 | static int decode_cb_fattr4(struct xdr_stream *xdr, uint32_t *bitmap, |
| 92 | struct nfs4_cb_fattr *fattr) |
| 93 | { |
| 94 | fattr->ncf_cb_change = 0; |
| 95 | fattr->ncf_cb_fsize = 0; |
| 96 | if (bitmap[0] & FATTR4_WORD0_CHANGE) |
| 97 | if (xdr_stream_decode_u64(xdr, &fattr->ncf_cb_change) < 0) |
| 98 | return -NFSERR_BAD_XDR; |
| 99 | if (bitmap[0] & FATTR4_WORD0_SIZE) |
| 100 | if (xdr_stream_decode_u64(xdr, &fattr->ncf_cb_fsize) < 0) |
| 101 | return -NFSERR_BAD_XDR; |
| 102 | return 0; |
Dai Ngo | 3959066 | 2022-11-16 19:44:46 -0800 | [diff] [blame] | 103 | } |
| 104 | |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 105 | static void encode_nfs_cb_opnum4(struct xdr_stream *xdr, enum nfs_cb_opnum4 op) |
Benny Halevy | 9303bbd | 2010-05-25 09:50:23 +0300 | [diff] [blame] | 106 | { |
| 107 | __be32 *p; |
| 108 | |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 109 | p = xdr_reserve_space(xdr, 4); |
| 110 | *p = cpu_to_be32(op); |
Benny Halevy | 9303bbd | 2010-05-25 09:50:23 +0300 | [diff] [blame] | 111 | } |
| 112 | |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 113 | /* |
| 114 | * nfs_fh4 |
| 115 | * |
| 116 | * typedef opaque nfs_fh4<NFS4_FHSIZE>; |
| 117 | */ |
| 118 | static void encode_nfs_fh4(struct xdr_stream *xdr, const struct knfsd_fh *fh) |
| 119 | { |
| 120 | u32 length = fh->fh_size; |
| 121 | __be32 *p; |
| 122 | |
| 123 | BUG_ON(length > NFS4_FHSIZE); |
| 124 | p = xdr_reserve_space(xdr, 4 + length); |
NeilBrown | d8b2607 | 2021-09-02 11:16:32 +1000 | [diff] [blame] | 125 | xdr_encode_opaque(p, &fh->fh_raw, length); |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 126 | } |
| 127 | |
| 128 | /* |
| 129 | * stateid4 |
| 130 | * |
| 131 | * struct stateid4 { |
| 132 | * uint32_t seqid; |
| 133 | * opaque other[12]; |
| 134 | * }; |
| 135 | */ |
| 136 | static void encode_stateid4(struct xdr_stream *xdr, const stateid_t *sid) |
| 137 | { |
| 138 | __be32 *p; |
| 139 | |
| 140 | p = xdr_reserve_space(xdr, NFS4_STATEID_SIZE); |
| 141 | *p++ = cpu_to_be32(sid->si_generation); |
| 142 | xdr_encode_opaque_fixed(p, &sid->si_opaque, NFS4_STATEID_OTHER_SIZE); |
| 143 | } |
| 144 | |
| 145 | /* |
| 146 | * sessionid4 |
| 147 | * |
| 148 | * typedef opaque sessionid4[NFS4_SESSIONID_SIZE]; |
| 149 | */ |
| 150 | static void encode_sessionid4(struct xdr_stream *xdr, |
| 151 | const struct nfsd4_session *session) |
| 152 | { |
| 153 | __be32 *p; |
| 154 | |
| 155 | p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN); |
| 156 | xdr_encode_opaque_fixed(p, session->se_sessionid.data, |
| 157 | NFS4_MAX_SESSIONID_LEN); |
| 158 | } |
| 159 | |
| 160 | /* |
Chuck Lever | 85a5648 | 2010-12-14 14:57:32 +0000 | [diff] [blame] | 161 | * nfsstat4 |
| 162 | */ |
| 163 | static const struct { |
| 164 | int stat; |
| 165 | int errno; |
| 166 | } nfs_cb_errtbl[] = { |
| 167 | { NFS4_OK, 0 }, |
| 168 | { NFS4ERR_PERM, -EPERM }, |
| 169 | { NFS4ERR_NOENT, -ENOENT }, |
| 170 | { NFS4ERR_IO, -EIO }, |
| 171 | { NFS4ERR_NXIO, -ENXIO }, |
| 172 | { NFS4ERR_ACCESS, -EACCES }, |
| 173 | { NFS4ERR_EXIST, -EEXIST }, |
| 174 | { NFS4ERR_XDEV, -EXDEV }, |
| 175 | { NFS4ERR_NOTDIR, -ENOTDIR }, |
| 176 | { NFS4ERR_ISDIR, -EISDIR }, |
| 177 | { NFS4ERR_INVAL, -EINVAL }, |
| 178 | { NFS4ERR_FBIG, -EFBIG }, |
| 179 | { NFS4ERR_NOSPC, -ENOSPC }, |
| 180 | { NFS4ERR_ROFS, -EROFS }, |
| 181 | { NFS4ERR_MLINK, -EMLINK }, |
| 182 | { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG }, |
| 183 | { NFS4ERR_NOTEMPTY, -ENOTEMPTY }, |
| 184 | { NFS4ERR_DQUOT, -EDQUOT }, |
| 185 | { NFS4ERR_STALE, -ESTALE }, |
| 186 | { NFS4ERR_BADHANDLE, -EBADHANDLE }, |
| 187 | { NFS4ERR_BAD_COOKIE, -EBADCOOKIE }, |
| 188 | { NFS4ERR_NOTSUPP, -ENOTSUPP }, |
| 189 | { NFS4ERR_TOOSMALL, -ETOOSMALL }, |
| 190 | { NFS4ERR_SERVERFAULT, -ESERVERFAULT }, |
| 191 | { NFS4ERR_BADTYPE, -EBADTYPE }, |
| 192 | { NFS4ERR_LOCKED, -EAGAIN }, |
| 193 | { NFS4ERR_RESOURCE, -EREMOTEIO }, |
| 194 | { NFS4ERR_SYMLINK, -ELOOP }, |
| 195 | { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP }, |
| 196 | { NFS4ERR_DEADLOCK, -EDEADLK }, |
| 197 | { -1, -EIO } |
| 198 | }; |
| 199 | |
| 200 | /* |
| 201 | * If we cannot translate the error, the recovery routines should |
| 202 | * handle it. |
| 203 | * |
| 204 | * Note: remaining NFSv4 error codes have values > 10000, so should |
| 205 | * not conflict with native Linux error codes. |
| 206 | */ |
| 207 | static int nfs_cb_stat_to_errno(int status) |
| 208 | { |
| 209 | int i; |
| 210 | |
| 211 | for (i = 0; nfs_cb_errtbl[i].stat != -1; i++) { |
| 212 | if (nfs_cb_errtbl[i].stat == status) |
| 213 | return nfs_cb_errtbl[i].errno; |
| 214 | } |
| 215 | |
| 216 | dprintk("NFSD: Unrecognized NFS CB status value: %u\n", status); |
| 217 | return -status; |
| 218 | } |
| 219 | |
Stefan Agner | 47299f7 | 2018-03-19 23:37:05 +0100 | [diff] [blame] | 220 | static int decode_cb_op_status(struct xdr_stream *xdr, |
| 221 | enum nfs_cb_opnum4 expected, int *status) |
Chuck Lever | 85a5648 | 2010-12-14 14:57:32 +0000 | [diff] [blame] | 222 | { |
| 223 | __be32 *p; |
| 224 | u32 op; |
| 225 | |
| 226 | p = xdr_inline_decode(xdr, 4 + 4); |
| 227 | if (unlikely(p == NULL)) |
| 228 | goto out_overflow; |
| 229 | op = be32_to_cpup(p++); |
| 230 | if (unlikely(op != expected)) |
| 231 | goto out_unexpected; |
Christoph Hellwig | ef2a1b3 | 2015-04-30 11:49:23 +0200 | [diff] [blame] | 232 | *status = nfs_cb_stat_to_errno(be32_to_cpup(p)); |
Chuck Lever | 85a5648 | 2010-12-14 14:57:32 +0000 | [diff] [blame] | 233 | return 0; |
| 234 | out_overflow: |
Chuck Lever | 85a5648 | 2010-12-14 14:57:32 +0000 | [diff] [blame] | 235 | return -EIO; |
| 236 | out_unexpected: |
| 237 | dprintk("NFSD: Callback server returned operation %d but " |
| 238 | "we issued a request for %d\n", op, expected); |
| 239 | return -EIO; |
| 240 | } |
| 241 | |
| 242 | /* |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 243 | * CB_COMPOUND4args |
| 244 | * |
| 245 | * struct CB_COMPOUND4args { |
| 246 | * utf8str_cs tag; |
| 247 | * uint32_t minorversion; |
| 248 | * uint32_t callback_ident; |
| 249 | * nfs_cb_argop4 argarray<>; |
| 250 | * }; |
| 251 | */ |
| 252 | static void encode_cb_compound4args(struct xdr_stream *xdr, |
| 253 | struct nfs4_cb_compound_hdr *hdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | { |
Al Viro | f00f328 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 255 | __be32 * p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 257 | p = xdr_reserve_space(xdr, 4 + 4 + 4 + 4); |
| 258 | p = xdr_encode_empty_array(p); /* empty tag */ |
| 259 | *p++ = cpu_to_be32(hdr->minorversion); |
| 260 | *p++ = cpu_to_be32(hdr->ident); |
| 261 | |
Andy Adamson | ef52bff | 2009-06-16 04:20:50 +0300 | [diff] [blame] | 262 | hdr->nops_p = p; |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 263 | *p = cpu_to_be32(hdr->nops); /* argarray element count */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | } |
| 265 | |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 266 | /* |
| 267 | * Update argarray element count |
| 268 | */ |
Andy Adamson | ef52bff | 2009-06-16 04:20:50 +0300 | [diff] [blame] | 269 | static void encode_cb_nops(struct nfs4_cb_compound_hdr *hdr) |
| 270 | { |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 271 | BUG_ON(hdr->nops > NFS4_MAX_BACK_CHANNEL_OPS); |
| 272 | *hdr->nops_p = cpu_to_be32(hdr->nops); |
Andy Adamson | ef52bff | 2009-06-16 04:20:50 +0300 | [diff] [blame] | 273 | } |
| 274 | |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 275 | /* |
Chuck Lever | 85a5648 | 2010-12-14 14:57:32 +0000 | [diff] [blame] | 276 | * CB_COMPOUND4res |
| 277 | * |
| 278 | * struct CB_COMPOUND4res { |
| 279 | * nfsstat4 status; |
| 280 | * utf8str_cs tag; |
| 281 | * nfs_cb_resop4 resarray<>; |
| 282 | * }; |
| 283 | */ |
| 284 | static int decode_cb_compound4res(struct xdr_stream *xdr, |
| 285 | struct nfs4_cb_compound_hdr *hdr) |
| 286 | { |
| 287 | u32 length; |
| 288 | __be32 *p; |
| 289 | |
| 290 | p = xdr_inline_decode(xdr, 4 + 4); |
| 291 | if (unlikely(p == NULL)) |
| 292 | goto out_overflow; |
| 293 | hdr->status = be32_to_cpup(p++); |
| 294 | /* Ignore the tag */ |
| 295 | length = be32_to_cpup(p++); |
| 296 | p = xdr_inline_decode(xdr, length + 4); |
| 297 | if (unlikely(p == NULL)) |
| 298 | goto out_overflow; |
Kinglong Mee | e86a40b | 2017-02-05 09:57:37 +0800 | [diff] [blame] | 299 | p += XDR_QUADLEN(length); |
Chuck Lever | 85a5648 | 2010-12-14 14:57:32 +0000 | [diff] [blame] | 300 | hdr->nops = be32_to_cpup(p); |
| 301 | return 0; |
| 302 | out_overflow: |
Chuck Lever | 85a5648 | 2010-12-14 14:57:32 +0000 | [diff] [blame] | 303 | return -EIO; |
| 304 | } |
| 305 | |
| 306 | /* |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 307 | * CB_RECALL4args |
| 308 | * |
| 309 | * struct CB_RECALL4args { |
| 310 | * stateid4 stateid; |
| 311 | * bool truncate; |
| 312 | * nfs_fh4 fh; |
| 313 | * }; |
| 314 | */ |
| 315 | static void encode_cb_recall4args(struct xdr_stream *xdr, |
| 316 | const struct nfs4_delegation *dp, |
| 317 | struct nfs4_cb_compound_hdr *hdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | { |
Al Viro | f00f328 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 319 | __be32 *p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 321 | encode_nfs_cb_opnum4(xdr, OP_CB_RECALL); |
J. Bruce Fields | d5477a8 | 2011-09-08 12:07:44 -0400 | [diff] [blame] | 322 | encode_stateid4(xdr, &dp->dl_stid.sc_stateid); |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 323 | |
| 324 | p = xdr_reserve_space(xdr, 4); |
| 325 | *p++ = xdr_zero; /* truncate */ |
| 326 | |
Trond Myklebust | 11b9164 | 2014-07-29 21:34:08 -0400 | [diff] [blame] | 327 | encode_nfs_fh4(xdr, &dp->dl_stid.sc_file->fi_fhandle); |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 328 | |
Andy Adamson | ef52bff | 2009-06-16 04:20:50 +0300 | [diff] [blame] | 329 | hdr->nops++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | } |
| 331 | |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 332 | /* |
Dai Ngo | 3959066 | 2022-11-16 19:44:46 -0800 | [diff] [blame] | 333 | * CB_RECALLANY4args |
| 334 | * |
| 335 | * struct CB_RECALLANY4args { |
| 336 | * uint32_t craa_objects_to_keep; |
| 337 | * bitmap4 craa_type_mask; |
| 338 | * }; |
| 339 | */ |
| 340 | static void |
| 341 | encode_cb_recallany4args(struct xdr_stream *xdr, |
| 342 | struct nfs4_cb_compound_hdr *hdr, struct nfsd4_cb_recall_any *ra) |
| 343 | { |
| 344 | encode_nfs_cb_opnum4(xdr, OP_CB_RECALL_ANY); |
| 345 | encode_uint32(xdr, ra->ra_keep); |
| 346 | encode_bitmap4(xdr, ra->ra_bmval, ARRAY_SIZE(ra->ra_bmval)); |
| 347 | hdr->nops++; |
| 348 | } |
| 349 | |
| 350 | /* |
Dai Ngo | 6487a13 | 2024-02-15 14:05:21 -0800 | [diff] [blame] | 351 | * CB_GETATTR4args |
| 352 | * struct CB_GETATTR4args { |
| 353 | * nfs_fh4 fh; |
| 354 | * bitmap4 attr_request; |
| 355 | * }; |
| 356 | * |
| 357 | * The size and change attributes are the only one |
| 358 | * guaranteed to be serviced by the client. |
| 359 | */ |
| 360 | static void |
| 361 | encode_cb_getattr4args(struct xdr_stream *xdr, struct nfs4_cb_compound_hdr *hdr, |
| 362 | struct nfs4_cb_fattr *fattr) |
| 363 | { |
| 364 | struct nfs4_delegation *dp = |
| 365 | container_of(fattr, struct nfs4_delegation, dl_cb_fattr); |
| 366 | struct knfsd_fh *fh = &dp->dl_stid.sc_file->fi_fhandle; |
| 367 | |
| 368 | encode_nfs_cb_opnum4(xdr, OP_CB_GETATTR); |
| 369 | encode_nfs_fh4(xdr, fh); |
| 370 | encode_bitmap4(xdr, fattr->ncf_cb_bmap, ARRAY_SIZE(fattr->ncf_cb_bmap)); |
| 371 | hdr->nops++; |
| 372 | } |
| 373 | |
| 374 | /* |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 375 | * CB_SEQUENCE4args |
| 376 | * |
| 377 | * struct CB_SEQUENCE4args { |
| 378 | * sessionid4 csa_sessionid; |
| 379 | * sequenceid4 csa_sequenceid; |
| 380 | * slotid4 csa_slotid; |
| 381 | * slotid4 csa_highest_slotid; |
| 382 | * bool csa_cachethis; |
| 383 | * referring_call_list4 csa_referring_call_lists<>; |
| 384 | * }; |
| 385 | */ |
| 386 | static void encode_cb_sequence4args(struct xdr_stream *xdr, |
| 387 | const struct nfsd4_callback *cb, |
| 388 | struct nfs4_cb_compound_hdr *hdr) |
Benny Halevy | 2af7358 | 2009-09-10 12:26:51 +0300 | [diff] [blame] | 389 | { |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 390 | struct nfsd4_session *session = cb->cb_clp->cl_cb_session; |
Benny Halevy | 2af7358 | 2009-09-10 12:26:51 +0300 | [diff] [blame] | 391 | __be32 *p; |
| 392 | |
| 393 | if (hdr->minorversion == 0) |
| 394 | return; |
| 395 | |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 396 | encode_nfs_cb_opnum4(xdr, OP_CB_SEQUENCE); |
| 397 | encode_sessionid4(xdr, session); |
Benny Halevy | 2af7358 | 2009-09-10 12:26:51 +0300 | [diff] [blame] | 398 | |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 399 | p = xdr_reserve_space(xdr, 4 + 4 + 4 + 4 + 4); |
| 400 | *p++ = cpu_to_be32(session->se_cb_seq_nr); /* csa_sequenceid */ |
| 401 | *p++ = xdr_zero; /* csa_slotid */ |
| 402 | *p++ = xdr_zero; /* csa_highest_slotid */ |
| 403 | *p++ = xdr_zero; /* csa_cachethis */ |
| 404 | xdr_encode_empty_array(p); /* csa_referring_call_lists */ |
| 405 | |
Benny Halevy | 2af7358 | 2009-09-10 12:26:51 +0300 | [diff] [blame] | 406 | hdr->nops++; |
| 407 | } |
| 408 | |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 409 | /* |
Chuck Lever | 85a5648 | 2010-12-14 14:57:32 +0000 | [diff] [blame] | 410 | * CB_SEQUENCE4resok |
| 411 | * |
| 412 | * struct CB_SEQUENCE4resok { |
| 413 | * sessionid4 csr_sessionid; |
| 414 | * sequenceid4 csr_sequenceid; |
| 415 | * slotid4 csr_slotid; |
| 416 | * slotid4 csr_highest_slotid; |
| 417 | * slotid4 csr_target_highest_slotid; |
| 418 | * }; |
| 419 | * |
| 420 | * union CB_SEQUENCE4res switch (nfsstat4 csr_status) { |
| 421 | * case NFS4_OK: |
| 422 | * CB_SEQUENCE4resok csr_resok4; |
| 423 | * default: |
| 424 | * void; |
| 425 | * }; |
| 426 | * |
| 427 | * Our current back channel implmentation supports a single backchannel |
| 428 | * with a single slot. |
| 429 | */ |
| 430 | static int decode_cb_sequence4resok(struct xdr_stream *xdr, |
| 431 | struct nfsd4_callback *cb) |
| 432 | { |
| 433 | struct nfsd4_session *session = cb->cb_clp->cl_cb_session; |
Kinglong Mee | 8274338 | 2017-02-05 09:57:48 +0800 | [diff] [blame] | 434 | int status = -ESERVERFAULT; |
Chuck Lever | 85a5648 | 2010-12-14 14:57:32 +0000 | [diff] [blame] | 435 | __be32 *p; |
| 436 | u32 dummy; |
| 437 | |
Chuck Lever | 85a5648 | 2010-12-14 14:57:32 +0000 | [diff] [blame] | 438 | /* |
| 439 | * If the server returns different values for sessionID, slotID or |
| 440 | * sequence number, the server is looney tunes. |
| 441 | */ |
Benny Halevy | 2c9c8f3 | 2011-02-22 14:43:22 -0800 | [diff] [blame] | 442 | p = xdr_inline_decode(xdr, NFS4_MAX_SESSIONID_LEN + 4 + 4 + 4 + 4); |
Chuck Lever | 85a5648 | 2010-12-14 14:57:32 +0000 | [diff] [blame] | 443 | if (unlikely(p == NULL)) |
| 444 | goto out_overflow; |
Kinglong Mee | 8274338 | 2017-02-05 09:57:48 +0800 | [diff] [blame] | 445 | |
| 446 | if (memcmp(p, session->se_sessionid.data, NFS4_MAX_SESSIONID_LEN)) { |
Chuck Lever | 85a5648 | 2010-12-14 14:57:32 +0000 | [diff] [blame] | 447 | dprintk("NFS: %s Invalid session id\n", __func__); |
| 448 | goto out; |
| 449 | } |
| 450 | p += XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN); |
| 451 | |
| 452 | dummy = be32_to_cpup(p++); |
| 453 | if (dummy != session->se_cb_seq_nr) { |
| 454 | dprintk("NFS: %s Invalid sequence number\n", __func__); |
| 455 | goto out; |
| 456 | } |
| 457 | |
| 458 | dummy = be32_to_cpup(p++); |
| 459 | if (dummy != 0) { |
| 460 | dprintk("NFS: %s Invalid slotid\n", __func__); |
| 461 | goto out; |
| 462 | } |
| 463 | |
| 464 | /* |
| 465 | * FIXME: process highest slotid and target highest slotid |
| 466 | */ |
| 467 | status = 0; |
| 468 | out: |
Kinglong Mee | 7ba6cad | 2015-06-24 16:33:37 +0800 | [diff] [blame] | 469 | cb->cb_seq_status = status; |
Chuck Lever | 85a5648 | 2010-12-14 14:57:32 +0000 | [diff] [blame] | 470 | return status; |
| 471 | out_overflow: |
Kinglong Mee | 7ba6cad | 2015-06-24 16:33:37 +0800 | [diff] [blame] | 472 | status = -EIO; |
| 473 | goto out; |
Chuck Lever | 85a5648 | 2010-12-14 14:57:32 +0000 | [diff] [blame] | 474 | } |
| 475 | |
| 476 | static int decode_cb_sequence4res(struct xdr_stream *xdr, |
| 477 | struct nfsd4_callback *cb) |
| 478 | { |
Chuck Lever | 85a5648 | 2010-12-14 14:57:32 +0000 | [diff] [blame] | 479 | int status; |
| 480 | |
Jeff Layton | 89dfdc9 | 2016-08-16 13:29:27 -0400 | [diff] [blame] | 481 | if (cb->cb_clp->cl_minorversion == 0) |
Chuck Lever | 85a5648 | 2010-12-14 14:57:32 +0000 | [diff] [blame] | 482 | return 0; |
| 483 | |
Kinglong Mee | 7ba6cad | 2015-06-24 16:33:37 +0800 | [diff] [blame] | 484 | status = decode_cb_op_status(xdr, OP_CB_SEQUENCE, &cb->cb_seq_status); |
| 485 | if (unlikely(status || cb->cb_seq_status)) |
Christoph Hellwig | ef2a1b3 | 2015-04-30 11:49:23 +0200 | [diff] [blame] | 486 | return status; |
| 487 | |
| 488 | return decode_cb_sequence4resok(xdr, cb); |
Chuck Lever | 85a5648 | 2010-12-14 14:57:32 +0000 | [diff] [blame] | 489 | } |
| 490 | |
| 491 | /* |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 492 | * NFSv4.0 and NFSv4.1 XDR encode functions |
| 493 | * |
| 494 | * NFSv4.0 callback argument types are defined in section 15 of RFC |
| 495 | * 3530: "Network File System (NFS) version 4 Protocol" and section 20 |
| 496 | * of RFC 5661: "Network File System (NFS) Version 4 Minor Version 1 |
| 497 | * Protocol". |
| 498 | */ |
| 499 | |
| 500 | /* |
| 501 | * NB: Without this zero space reservation, callbacks over krb5p fail |
| 502 | */ |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 503 | static void nfs4_xdr_enc_cb_null(struct rpc_rqst *req, struct xdr_stream *xdr, |
Christoph Hellwig | 1502c81 | 2017-05-08 14:47:53 +0200 | [diff] [blame] | 504 | const void *__unused) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | { |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 506 | xdr_reserve_space(xdr, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | } |
| 508 | |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 509 | /* |
Dai Ngo | 6487a13 | 2024-02-15 14:05:21 -0800 | [diff] [blame] | 510 | * 20.1. Operation 3: CB_GETATTR - Get Attributes |
| 511 | */ |
| 512 | static void nfs4_xdr_enc_cb_getattr(struct rpc_rqst *req, |
| 513 | struct xdr_stream *xdr, const void *data) |
| 514 | { |
| 515 | const struct nfsd4_callback *cb = data; |
| 516 | struct nfs4_cb_fattr *ncf = |
| 517 | container_of(cb, struct nfs4_cb_fattr, ncf_getattr); |
| 518 | struct nfs4_cb_compound_hdr hdr = { |
| 519 | .ident = cb->cb_clp->cl_cb_ident, |
| 520 | .minorversion = cb->cb_clp->cl_minorversion, |
| 521 | }; |
| 522 | |
| 523 | encode_cb_compound4args(xdr, &hdr); |
| 524 | encode_cb_sequence4args(xdr, cb, &hdr); |
| 525 | encode_cb_getattr4args(xdr, &hdr, ncf); |
| 526 | encode_cb_nops(&hdr); |
| 527 | } |
| 528 | |
| 529 | /* |
Chuck Lever | a033db4 | 2010-12-14 14:57:22 +0000 | [diff] [blame] | 530 | * 20.2. Operation 4: CB_RECALL - Recall a Delegation |
| 531 | */ |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 532 | static void nfs4_xdr_enc_cb_recall(struct rpc_rqst *req, struct xdr_stream *xdr, |
Christoph Hellwig | 1502c81 | 2017-05-08 14:47:53 +0200 | [diff] [blame] | 533 | const void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | { |
Christoph Hellwig | 1502c81 | 2017-05-08 14:47:53 +0200 | [diff] [blame] | 535 | const struct nfsd4_callback *cb = data; |
Jeff Layton | 34549ab | 2014-10-01 08:05:22 -0400 | [diff] [blame] | 536 | const struct nfs4_delegation *dp = cb_to_delegation(cb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | struct nfs4_cb_compound_hdr hdr = { |
J. Bruce Fields | 6ff8da0 | 2010-06-04 20:04:45 -0400 | [diff] [blame] | 538 | .ident = cb->cb_clp->cl_cb_ident, |
Jeff Layton | 89dfdc9 | 2016-08-16 13:29:27 -0400 | [diff] [blame] | 539 | .minorversion = cb->cb_clp->cl_minorversion, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | }; |
| 541 | |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 542 | encode_cb_compound4args(xdr, &hdr); |
| 543 | encode_cb_sequence4args(xdr, cb, &hdr); |
Christoph Hellwig | 2faf3b4 | 2014-09-24 12:19:16 +0200 | [diff] [blame] | 544 | encode_cb_recall4args(xdr, dp, &hdr); |
Andy Adamson | ef52bff | 2009-06-16 04:20:50 +0300 | [diff] [blame] | 545 | encode_cb_nops(&hdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | } |
| 547 | |
Dai Ngo | 3959066 | 2022-11-16 19:44:46 -0800 | [diff] [blame] | 548 | /* |
| 549 | * 20.6. Operation 8: CB_RECALL_ANY - Keep Any N Recallable Objects |
| 550 | */ |
| 551 | static void |
| 552 | nfs4_xdr_enc_cb_recall_any(struct rpc_rqst *req, |
| 553 | struct xdr_stream *xdr, const void *data) |
| 554 | { |
| 555 | const struct nfsd4_callback *cb = data; |
| 556 | struct nfsd4_cb_recall_any *ra; |
| 557 | struct nfs4_cb_compound_hdr hdr = { |
| 558 | .ident = cb->cb_clp->cl_cb_ident, |
| 559 | .minorversion = cb->cb_clp->cl_minorversion, |
| 560 | }; |
| 561 | |
| 562 | ra = container_of(cb, struct nfsd4_cb_recall_any, ra_cb); |
| 563 | encode_cb_compound4args(xdr, &hdr); |
| 564 | encode_cb_sequence4args(xdr, cb, &hdr); |
| 565 | encode_cb_recallany4args(xdr, &hdr, ra); |
| 566 | encode_cb_nops(&hdr); |
| 567 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | |
Chuck Lever | 85a5648 | 2010-12-14 14:57:32 +0000 | [diff] [blame] | 569 | /* |
| 570 | * NFSv4.0 and NFSv4.1 XDR decode functions |
| 571 | * |
| 572 | * NFSv4.0 callback result types are defined in section 15 of RFC |
| 573 | * 3530: "Network File System (NFS) version 4 Protocol" and section 20 |
| 574 | * of RFC 5661: "Network File System (NFS) Version 4 Minor Version 1 |
| 575 | * Protocol". |
| 576 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 578 | static int nfs4_xdr_dec_cb_null(struct rpc_rqst *req, struct xdr_stream *xdr, |
| 579 | void *__unused) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | return 0; |
| 582 | } |
| 583 | |
Benny Halevy | 2af7358 | 2009-09-10 12:26:51 +0300 | [diff] [blame] | 584 | /* |
Dai Ngo | 6487a13 | 2024-02-15 14:05:21 -0800 | [diff] [blame] | 585 | * 20.1. Operation 3: CB_GETATTR - Get Attributes |
| 586 | */ |
| 587 | static int nfs4_xdr_dec_cb_getattr(struct rpc_rqst *rqstp, |
| 588 | struct xdr_stream *xdr, |
| 589 | void *data) |
| 590 | { |
| 591 | struct nfsd4_callback *cb = data; |
| 592 | struct nfs4_cb_compound_hdr hdr; |
| 593 | int status; |
| 594 | u32 bitmap[3] = {0}; |
| 595 | u32 attrlen; |
| 596 | struct nfs4_cb_fattr *ncf = |
| 597 | container_of(cb, struct nfs4_cb_fattr, ncf_getattr); |
| 598 | |
| 599 | status = decode_cb_compound4res(xdr, &hdr); |
| 600 | if (unlikely(status)) |
| 601 | return status; |
| 602 | |
| 603 | status = decode_cb_sequence4res(xdr, cb); |
| 604 | if (unlikely(status || cb->cb_seq_status)) |
| 605 | return status; |
| 606 | |
| 607 | status = decode_cb_op_status(xdr, OP_CB_GETATTR, &cb->cb_status); |
| 608 | if (status) |
| 609 | return status; |
| 610 | if (xdr_stream_decode_uint32_array(xdr, bitmap, 3) < 0) |
| 611 | return -NFSERR_BAD_XDR; |
| 612 | if (xdr_stream_decode_u32(xdr, &attrlen) < 0) |
| 613 | return -NFSERR_BAD_XDR; |
| 614 | if (attrlen > (sizeof(ncf->ncf_cb_change) + sizeof(ncf->ncf_cb_fsize))) |
| 615 | return -NFSERR_BAD_XDR; |
| 616 | status = decode_cb_fattr4(xdr, bitmap, ncf); |
| 617 | return status; |
| 618 | } |
| 619 | |
| 620 | /* |
Chuck Lever | 85a5648 | 2010-12-14 14:57:32 +0000 | [diff] [blame] | 621 | * 20.2. Operation 4: CB_RECALL - Recall a Delegation |
Benny Halevy | 2af7358 | 2009-09-10 12:26:51 +0300 | [diff] [blame] | 622 | */ |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 623 | static int nfs4_xdr_dec_cb_recall(struct rpc_rqst *rqstp, |
| 624 | struct xdr_stream *xdr, |
Christoph Hellwig | d39916c | 2017-05-08 15:04:45 +0200 | [diff] [blame] | 625 | void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | { |
Christoph Hellwig | d39916c | 2017-05-08 15:04:45 +0200 | [diff] [blame] | 627 | struct nfsd4_callback *cb = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | struct nfs4_cb_compound_hdr hdr; |
| 629 | int status; |
| 630 | |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 631 | status = decode_cb_compound4res(xdr, &hdr); |
Chuck Lever | 85a5648 | 2010-12-14 14:57:32 +0000 | [diff] [blame] | 632 | if (unlikely(status)) |
Christoph Hellwig | ef2a1b3 | 2015-04-30 11:49:23 +0200 | [diff] [blame] | 633 | return status; |
Chuck Lever | 85a5648 | 2010-12-14 14:57:32 +0000 | [diff] [blame] | 634 | |
J. Bruce Fields | 10fa8ac | 2019-07-30 19:06:38 -0400 | [diff] [blame] | 635 | status = decode_cb_sequence4res(xdr, cb); |
| 636 | if (unlikely(status || cb->cb_seq_status)) |
| 637 | return status; |
Chuck Lever | 85a5648 | 2010-12-14 14:57:32 +0000 | [diff] [blame] | 638 | |
Christoph Hellwig | ef2a1b3 | 2015-04-30 11:49:23 +0200 | [diff] [blame] | 639 | return decode_cb_op_status(xdr, OP_CB_RECALL, &cb->cb_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | } |
| 641 | |
Dai Ngo | 3959066 | 2022-11-16 19:44:46 -0800 | [diff] [blame] | 642 | /* |
| 643 | * 20.6. Operation 8: CB_RECALL_ANY - Keep Any N Recallable Objects |
| 644 | */ |
| 645 | static int |
| 646 | nfs4_xdr_dec_cb_recall_any(struct rpc_rqst *rqstp, |
| 647 | struct xdr_stream *xdr, |
| 648 | void *data) |
| 649 | { |
| 650 | struct nfsd4_callback *cb = data; |
| 651 | struct nfs4_cb_compound_hdr hdr; |
| 652 | int status; |
| 653 | |
| 654 | status = decode_cb_compound4res(xdr, &hdr); |
| 655 | if (unlikely(status)) |
| 656 | return status; |
| 657 | status = decode_cb_sequence4res(xdr, cb); |
| 658 | if (unlikely(status || cb->cb_seq_status)) |
| 659 | return status; |
| 660 | status = decode_cb_op_status(xdr, OP_CB_RECALL_ANY, &cb->cb_status); |
| 661 | return status; |
| 662 | } |
| 663 | |
Christoph Hellwig | c5c707f | 2014-09-23 12:38:48 +0200 | [diff] [blame] | 664 | #ifdef CONFIG_NFSD_PNFS |
| 665 | /* |
| 666 | * CB_LAYOUTRECALL4args |
| 667 | * |
| 668 | * struct layoutrecall_file4 { |
| 669 | * nfs_fh4 lor_fh; |
| 670 | * offset4 lor_offset; |
| 671 | * length4 lor_length; |
| 672 | * stateid4 lor_stateid; |
| 673 | * }; |
| 674 | * |
| 675 | * union layoutrecall4 switch(layoutrecall_type4 lor_recalltype) { |
| 676 | * case LAYOUTRECALL4_FILE: |
| 677 | * layoutrecall_file4 lor_layout; |
| 678 | * case LAYOUTRECALL4_FSID: |
| 679 | * fsid4 lor_fsid; |
| 680 | * case LAYOUTRECALL4_ALL: |
| 681 | * void; |
| 682 | * }; |
| 683 | * |
| 684 | * struct CB_LAYOUTRECALL4args { |
| 685 | * layouttype4 clora_type; |
| 686 | * layoutiomode4 clora_iomode; |
| 687 | * bool clora_changed; |
| 688 | * layoutrecall4 clora_recall; |
| 689 | * }; |
| 690 | */ |
| 691 | static void encode_cb_layout4args(struct xdr_stream *xdr, |
| 692 | const struct nfs4_layout_stateid *ls, |
| 693 | struct nfs4_cb_compound_hdr *hdr) |
| 694 | { |
| 695 | __be32 *p; |
| 696 | |
| 697 | BUG_ON(hdr->minorversion == 0); |
| 698 | |
| 699 | p = xdr_reserve_space(xdr, 5 * 4); |
| 700 | *p++ = cpu_to_be32(OP_CB_LAYOUTRECALL); |
| 701 | *p++ = cpu_to_be32(ls->ls_layout_type); |
| 702 | *p++ = cpu_to_be32(IOMODE_ANY); |
| 703 | *p++ = cpu_to_be32(1); |
| 704 | *p = cpu_to_be32(RETURN_FILE); |
| 705 | |
| 706 | encode_nfs_fh4(xdr, &ls->ls_stid.sc_file->fi_fhandle); |
| 707 | |
| 708 | p = xdr_reserve_space(xdr, 2 * 8); |
| 709 | p = xdr_encode_hyper(p, 0); |
| 710 | xdr_encode_hyper(p, NFS4_MAX_UINT64); |
| 711 | |
| 712 | encode_stateid4(xdr, &ls->ls_recall_sid); |
| 713 | |
| 714 | hdr->nops++; |
| 715 | } |
| 716 | |
| 717 | static void nfs4_xdr_enc_cb_layout(struct rpc_rqst *req, |
| 718 | struct xdr_stream *xdr, |
Christoph Hellwig | 1502c81 | 2017-05-08 14:47:53 +0200 | [diff] [blame] | 719 | const void *data) |
Christoph Hellwig | c5c707f | 2014-09-23 12:38:48 +0200 | [diff] [blame] | 720 | { |
Christoph Hellwig | 1502c81 | 2017-05-08 14:47:53 +0200 | [diff] [blame] | 721 | const struct nfsd4_callback *cb = data; |
Christoph Hellwig | c5c707f | 2014-09-23 12:38:48 +0200 | [diff] [blame] | 722 | const struct nfs4_layout_stateid *ls = |
| 723 | container_of(cb, struct nfs4_layout_stateid, ls_recall); |
| 724 | struct nfs4_cb_compound_hdr hdr = { |
| 725 | .ident = 0, |
Jeff Layton | 89dfdc9 | 2016-08-16 13:29:27 -0400 | [diff] [blame] | 726 | .minorversion = cb->cb_clp->cl_minorversion, |
Christoph Hellwig | c5c707f | 2014-09-23 12:38:48 +0200 | [diff] [blame] | 727 | }; |
| 728 | |
| 729 | encode_cb_compound4args(xdr, &hdr); |
| 730 | encode_cb_sequence4args(xdr, cb, &hdr); |
| 731 | encode_cb_layout4args(xdr, ls, &hdr); |
| 732 | encode_cb_nops(&hdr); |
| 733 | } |
| 734 | |
| 735 | static int nfs4_xdr_dec_cb_layout(struct rpc_rqst *rqstp, |
| 736 | struct xdr_stream *xdr, |
Christoph Hellwig | d39916c | 2017-05-08 15:04:45 +0200 | [diff] [blame] | 737 | void *data) |
Christoph Hellwig | c5c707f | 2014-09-23 12:38:48 +0200 | [diff] [blame] | 738 | { |
Christoph Hellwig | d39916c | 2017-05-08 15:04:45 +0200 | [diff] [blame] | 739 | struct nfsd4_callback *cb = data; |
Christoph Hellwig | c5c707f | 2014-09-23 12:38:48 +0200 | [diff] [blame] | 740 | struct nfs4_cb_compound_hdr hdr; |
Christoph Hellwig | c5c707f | 2014-09-23 12:38:48 +0200 | [diff] [blame] | 741 | int status; |
| 742 | |
| 743 | status = decode_cb_compound4res(xdr, &hdr); |
| 744 | if (unlikely(status)) |
Christoph Hellwig | ef2a1b3 | 2015-04-30 11:49:23 +0200 | [diff] [blame] | 745 | return status; |
| 746 | |
J. Bruce Fields | 10fa8ac | 2019-07-30 19:06:38 -0400 | [diff] [blame] | 747 | status = decode_cb_sequence4res(xdr, cb); |
| 748 | if (unlikely(status || cb->cb_seq_status)) |
| 749 | return status; |
| 750 | |
Christoph Hellwig | ef2a1b3 | 2015-04-30 11:49:23 +0200 | [diff] [blame] | 751 | return decode_cb_op_status(xdr, OP_CB_LAYOUTRECALL, &cb->cb_status); |
Christoph Hellwig | c5c707f | 2014-09-23 12:38:48 +0200 | [diff] [blame] | 752 | } |
| 753 | #endif /* CONFIG_NFSD_PNFS */ |
| 754 | |
Jeff Layton | a188620e | 2016-09-16 16:28:23 -0400 | [diff] [blame] | 755 | static void encode_stateowner(struct xdr_stream *xdr, struct nfs4_stateowner *so) |
| 756 | { |
| 757 | __be32 *p; |
| 758 | |
| 759 | p = xdr_reserve_space(xdr, 8 + 4 + so->so_owner.len); |
| 760 | p = xdr_encode_opaque_fixed(p, &so->so_client->cl_clientid, 8); |
| 761 | xdr_encode_opaque(p, so->so_owner.data, so->so_owner.len); |
| 762 | } |
| 763 | |
| 764 | static void nfs4_xdr_enc_cb_notify_lock(struct rpc_rqst *req, |
| 765 | struct xdr_stream *xdr, |
Christoph Hellwig | 1502c81 | 2017-05-08 14:47:53 +0200 | [diff] [blame] | 766 | const void *data) |
Jeff Layton | a188620e | 2016-09-16 16:28:23 -0400 | [diff] [blame] | 767 | { |
Christoph Hellwig | 1502c81 | 2017-05-08 14:47:53 +0200 | [diff] [blame] | 768 | const struct nfsd4_callback *cb = data; |
Jeff Layton | a188620e | 2016-09-16 16:28:23 -0400 | [diff] [blame] | 769 | const struct nfsd4_blocked_lock *nbl = |
| 770 | container_of(cb, struct nfsd4_blocked_lock, nbl_cb); |
Jeff Layton | 05580bb | 2024-01-31 18:02:23 -0500 | [diff] [blame] | 771 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)nbl->nbl_lock.c.flc_owner; |
Jeff Layton | a188620e | 2016-09-16 16:28:23 -0400 | [diff] [blame] | 772 | struct nfs4_cb_compound_hdr hdr = { |
| 773 | .ident = 0, |
| 774 | .minorversion = cb->cb_clp->cl_minorversion, |
| 775 | }; |
| 776 | |
| 777 | __be32 *p; |
| 778 | |
| 779 | BUG_ON(hdr.minorversion == 0); |
| 780 | |
| 781 | encode_cb_compound4args(xdr, &hdr); |
| 782 | encode_cb_sequence4args(xdr, cb, &hdr); |
| 783 | |
| 784 | p = xdr_reserve_space(xdr, 4); |
| 785 | *p = cpu_to_be32(OP_CB_NOTIFY_LOCK); |
| 786 | encode_nfs_fh4(xdr, &nbl->nbl_fh); |
| 787 | encode_stateowner(xdr, &lo->lo_owner); |
| 788 | hdr.nops++; |
| 789 | |
| 790 | encode_cb_nops(&hdr); |
| 791 | } |
| 792 | |
| 793 | static int nfs4_xdr_dec_cb_notify_lock(struct rpc_rqst *rqstp, |
| 794 | struct xdr_stream *xdr, |
Christoph Hellwig | d39916c | 2017-05-08 15:04:45 +0200 | [diff] [blame] | 795 | void *data) |
Jeff Layton | a188620e | 2016-09-16 16:28:23 -0400 | [diff] [blame] | 796 | { |
Christoph Hellwig | d39916c | 2017-05-08 15:04:45 +0200 | [diff] [blame] | 797 | struct nfsd4_callback *cb = data; |
Jeff Layton | a188620e | 2016-09-16 16:28:23 -0400 | [diff] [blame] | 798 | struct nfs4_cb_compound_hdr hdr; |
| 799 | int status; |
| 800 | |
| 801 | status = decode_cb_compound4res(xdr, &hdr); |
| 802 | if (unlikely(status)) |
| 803 | return status; |
| 804 | |
J. Bruce Fields | 10fa8ac | 2019-07-30 19:06:38 -0400 | [diff] [blame] | 805 | status = decode_cb_sequence4res(xdr, cb); |
| 806 | if (unlikely(status || cb->cb_seq_status)) |
| 807 | return status; |
| 808 | |
Jeff Layton | a188620e | 2016-09-16 16:28:23 -0400 | [diff] [blame] | 809 | return decode_cb_op_status(xdr, OP_CB_NOTIFY_LOCK, &cb->cb_status); |
| 810 | } |
| 811 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | /* |
Olga Kornievskaia | 9eb190fca8f | 2018-07-20 18:19:17 -0400 | [diff] [blame] | 813 | * struct write_response4 { |
| 814 | * stateid4 wr_callback_id<1>; |
| 815 | * length4 wr_count; |
| 816 | * stable_how4 wr_committed; |
| 817 | * verifier4 wr_writeverf; |
| 818 | * }; |
| 819 | * union offload_info4 switch (nfsstat4 coa_status) { |
| 820 | * case NFS4_OK: |
| 821 | * write_response4 coa_resok4; |
| 822 | * default: |
Chuck Lever | a11ada9 | 2022-07-27 14:41:18 -0400 | [diff] [blame] | 823 | * length4 coa_bytes_copied; |
Olga Kornievskaia | 9eb190fca8f | 2018-07-20 18:19:17 -0400 | [diff] [blame] | 824 | * }; |
| 825 | * struct CB_OFFLOAD4args { |
| 826 | * nfs_fh4 coa_fh; |
| 827 | * stateid4 coa_stateid; |
| 828 | * offload_info4 coa_offload_info; |
| 829 | * }; |
| 830 | */ |
| 831 | static void encode_offload_info4(struct xdr_stream *xdr, |
Chuck Lever | a11ada9 | 2022-07-27 14:41:18 -0400 | [diff] [blame] | 832 | const struct nfsd4_cb_offload *cbo) |
Olga Kornievskaia | 9eb190fca8f | 2018-07-20 18:19:17 -0400 | [diff] [blame] | 833 | { |
| 834 | __be32 *p; |
| 835 | |
| 836 | p = xdr_reserve_space(xdr, 4); |
Chuck Lever | a11ada9 | 2022-07-27 14:41:18 -0400 | [diff] [blame] | 837 | *p = cbo->co_nfserr; |
| 838 | switch (cbo->co_nfserr) { |
| 839 | case nfs_ok: |
Olga Kornievskaia | 9eb190fca8f | 2018-07-20 18:19:17 -0400 | [diff] [blame] | 840 | p = xdr_reserve_space(xdr, 4 + 8 + 4 + NFS4_VERIFIER_SIZE); |
| 841 | p = xdr_encode_empty_array(p); |
Chuck Lever | a11ada9 | 2022-07-27 14:41:18 -0400 | [diff] [blame] | 842 | p = xdr_encode_hyper(p, cbo->co_res.wr_bytes_written); |
| 843 | *p++ = cpu_to_be32(cbo->co_res.wr_stable_how); |
| 844 | p = xdr_encode_opaque_fixed(p, cbo->co_res.wr_verifier.data, |
Olga Kornievskaia | 9eb190fca8f | 2018-07-20 18:19:17 -0400 | [diff] [blame] | 845 | NFS4_VERIFIER_SIZE); |
Chuck Lever | a11ada9 | 2022-07-27 14:41:18 -0400 | [diff] [blame] | 846 | break; |
| 847 | default: |
Olga Kornievskaia | 9eb190fca8f | 2018-07-20 18:19:17 -0400 | [diff] [blame] | 848 | p = xdr_reserve_space(xdr, 8); |
| 849 | /* We always return success if bytes were written */ |
| 850 | p = xdr_encode_hyper(p, 0); |
| 851 | } |
| 852 | } |
| 853 | |
| 854 | static void encode_cb_offload4args(struct xdr_stream *xdr, |
Chuck Lever | a11ada9 | 2022-07-27 14:41:18 -0400 | [diff] [blame] | 855 | const struct nfsd4_cb_offload *cbo, |
Olga Kornievskaia | 9eb190fca8f | 2018-07-20 18:19:17 -0400 | [diff] [blame] | 856 | struct nfs4_cb_compound_hdr *hdr) |
| 857 | { |
| 858 | __be32 *p; |
| 859 | |
| 860 | p = xdr_reserve_space(xdr, 4); |
Chuck Lever | a11ada9 | 2022-07-27 14:41:18 -0400 | [diff] [blame] | 861 | *p = cpu_to_be32(OP_CB_OFFLOAD); |
| 862 | encode_nfs_fh4(xdr, &cbo->co_fh); |
| 863 | encode_stateid4(xdr, &cbo->co_res.cb_stateid); |
| 864 | encode_offload_info4(xdr, cbo); |
Olga Kornievskaia | 9eb190fca8f | 2018-07-20 18:19:17 -0400 | [diff] [blame] | 865 | |
| 866 | hdr->nops++; |
| 867 | } |
| 868 | |
| 869 | static void nfs4_xdr_enc_cb_offload(struct rpc_rqst *req, |
| 870 | struct xdr_stream *xdr, |
| 871 | const void *data) |
| 872 | { |
| 873 | const struct nfsd4_callback *cb = data; |
Chuck Lever | a11ada9 | 2022-07-27 14:41:18 -0400 | [diff] [blame] | 874 | const struct nfsd4_cb_offload *cbo = |
| 875 | container_of(cb, struct nfsd4_cb_offload, co_cb); |
Olga Kornievskaia | 9eb190fca8f | 2018-07-20 18:19:17 -0400 | [diff] [blame] | 876 | struct nfs4_cb_compound_hdr hdr = { |
| 877 | .ident = 0, |
| 878 | .minorversion = cb->cb_clp->cl_minorversion, |
| 879 | }; |
| 880 | |
| 881 | encode_cb_compound4args(xdr, &hdr); |
| 882 | encode_cb_sequence4args(xdr, cb, &hdr); |
Chuck Lever | a11ada9 | 2022-07-27 14:41:18 -0400 | [diff] [blame] | 883 | encode_cb_offload4args(xdr, cbo, &hdr); |
Olga Kornievskaia | 9eb190fca8f | 2018-07-20 18:19:17 -0400 | [diff] [blame] | 884 | encode_cb_nops(&hdr); |
| 885 | } |
| 886 | |
| 887 | static int nfs4_xdr_dec_cb_offload(struct rpc_rqst *rqstp, |
| 888 | struct xdr_stream *xdr, |
| 889 | void *data) |
| 890 | { |
| 891 | struct nfsd4_callback *cb = data; |
| 892 | struct nfs4_cb_compound_hdr hdr; |
| 893 | int status; |
| 894 | |
| 895 | status = decode_cb_compound4res(xdr, &hdr); |
| 896 | if (unlikely(status)) |
| 897 | return status; |
| 898 | |
J. Bruce Fields | 10fa8ac | 2019-07-30 19:06:38 -0400 | [diff] [blame] | 899 | status = decode_cb_sequence4res(xdr, cb); |
| 900 | if (unlikely(status || cb->cb_seq_status)) |
| 901 | return status; |
| 902 | |
Olga Kornievskaia | 9eb190fca8f | 2018-07-20 18:19:17 -0400 | [diff] [blame] | 903 | return decode_cb_op_status(xdr, OP_CB_OFFLOAD, &cb->cb_status); |
| 904 | } |
| 905 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | * RPC procedure tables |
| 907 | */ |
Chuck Lever | 7d93bd71 | 2010-12-14 14:57:42 +0000 | [diff] [blame] | 908 | #define PROC(proc, call, argtype, restype) \ |
| 909 | [NFSPROC4_CLNT_##proc] = { \ |
| 910 | .p_proc = NFSPROC4_CB_##call, \ |
Christoph Hellwig | 1502c81 | 2017-05-08 14:47:53 +0200 | [diff] [blame] | 911 | .p_encode = nfs4_xdr_enc_##argtype, \ |
Christoph Hellwig | d39916c | 2017-05-08 15:04:45 +0200 | [diff] [blame] | 912 | .p_decode = nfs4_xdr_dec_##restype, \ |
Chuck Lever | 7d93bd71 | 2010-12-14 14:57:42 +0000 | [diff] [blame] | 913 | .p_arglen = NFS4_enc_##argtype##_sz, \ |
| 914 | .p_replen = NFS4_dec_##restype##_sz, \ |
| 915 | .p_statidx = NFSPROC4_CB_##call, \ |
| 916 | .p_name = #proc, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | } |
| 918 | |
Christoph Hellwig | 499b498 | 2017-05-12 15:36:49 +0200 | [diff] [blame] | 919 | static const struct rpc_procinfo nfs4_cb_procedures[] = { |
Chuck Lever | 7d93bd71 | 2010-12-14 14:57:42 +0000 | [diff] [blame] | 920 | PROC(CB_NULL, NULL, cb_null, cb_null), |
| 921 | PROC(CB_RECALL, COMPOUND, cb_recall, cb_recall), |
Christoph Hellwig | c5c707f | 2014-09-23 12:38:48 +0200 | [diff] [blame] | 922 | #ifdef CONFIG_NFSD_PNFS |
| 923 | PROC(CB_LAYOUT, COMPOUND, cb_layout, cb_layout), |
| 924 | #endif |
Jeff Layton | a188620e | 2016-09-16 16:28:23 -0400 | [diff] [blame] | 925 | PROC(CB_NOTIFY_LOCK, COMPOUND, cb_notify_lock, cb_notify_lock), |
Olga Kornievskaia | 9eb190fca8f | 2018-07-20 18:19:17 -0400 | [diff] [blame] | 926 | PROC(CB_OFFLOAD, COMPOUND, cb_offload, cb_offload), |
Dai Ngo | 3959066 | 2022-11-16 19:44:46 -0800 | [diff] [blame] | 927 | PROC(CB_RECALL_ANY, COMPOUND, cb_recall_any, cb_recall_any), |
Dai Ngo | 6487a13 | 2024-02-15 14:05:21 -0800 | [diff] [blame] | 928 | PROC(CB_GETATTR, COMPOUND, cb_getattr, cb_getattr), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | }; |
| 930 | |
Christoph Hellwig | 1c5876d | 2017-05-08 23:27:10 +0200 | [diff] [blame] | 931 | static unsigned int nfs4_cb_counts[ARRAY_SIZE(nfs4_cb_procedures)]; |
Christoph Hellwig | 02be49f | 2017-05-12 15:58:06 +0200 | [diff] [blame] | 932 | static const struct rpc_version nfs_cb_version4 = { |
J. Bruce Fields | b7299f4 | 2010-05-14 17:57:35 -0400 | [diff] [blame] | 933 | /* |
| 934 | * Note on the callback rpc program version number: despite language in rfc |
| 935 | * 5661 section 18.36.3 requiring servers to use 4 in this field, the |
| 936 | * official xdr descriptions for both 4.0 and 4.1 specify version 1, and |
| 937 | * in practice that appears to be what implementations use. The section |
| 938 | * 18.36.3 language is expected to be fixed in an erratum. |
| 939 | */ |
Chuck Lever | 7d93bd71 | 2010-12-14 14:57:42 +0000 | [diff] [blame] | 940 | .number = 1, |
| 941 | .nrprocs = ARRAY_SIZE(nfs4_cb_procedures), |
Christoph Hellwig | 1c5876d | 2017-05-08 23:27:10 +0200 | [diff] [blame] | 942 | .procs = nfs4_cb_procedures, |
| 943 | .counts = nfs4_cb_counts, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | }; |
| 945 | |
Trond Myklebust | eff7936 | 2017-07-16 22:57:27 +0000 | [diff] [blame] | 946 | static const struct rpc_version *nfs_cb_version[2] = { |
| 947 | [1] = &nfs_cb_version4, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | }; |
| 949 | |
Trond Myklebust | a613fa1 | 2012-01-20 13:53:56 -0500 | [diff] [blame] | 950 | static const struct rpc_program cb_program; |
Olga Kornievskaia | ff7d975 | 2008-03-28 16:04:56 -0400 | [diff] [blame] | 951 | |
| 952 | static struct rpc_stat cb_stats = { |
Chuck Lever | 7d93bd71 | 2010-12-14 14:57:42 +0000 | [diff] [blame] | 953 | .program = &cb_program |
Olga Kornievskaia | ff7d975 | 2008-03-28 16:04:56 -0400 | [diff] [blame] | 954 | }; |
| 955 | |
| 956 | #define NFS4_CALLBACK 0x40000000 |
Trond Myklebust | a613fa1 | 2012-01-20 13:53:56 -0500 | [diff] [blame] | 957 | static const struct rpc_program cb_program = { |
Chuck Lever | 7d93bd71 | 2010-12-14 14:57:42 +0000 | [diff] [blame] | 958 | .name = "nfs4_cb", |
| 959 | .number = NFS4_CALLBACK, |
| 960 | .nrvers = ARRAY_SIZE(nfs_cb_version), |
| 961 | .version = nfs_cb_version, |
| 962 | .stats = &cb_stats, |
Stanislav Kinsbursky | 0157d02 | 2012-01-11 19:18:01 +0400 | [diff] [blame] | 963 | .pipe_dir_name = "nfsd4_cb", |
Olga Kornievskaia | ff7d975 | 2008-03-28 16:04:56 -0400 | [diff] [blame] | 964 | }; |
| 965 | |
Stanislav Kinsbursky | 3d73371 | 2012-11-27 14:11:44 +0300 | [diff] [blame] | 966 | static int max_cb_time(struct net *net) |
J. Bruce Fields | 595947a | 2009-03-05 17:18:10 -0500 | [diff] [blame] | 967 | { |
Stanislav Kinsbursky | 3d73371 | 2012-11-27 14:11:44 +0300 | [diff] [blame] | 968 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
Arnd Bergmann | 20b7d86 | 2019-11-04 16:31:52 +0100 | [diff] [blame] | 969 | |
| 970 | /* |
| 971 | * nfsd4_lease is set to at most one hour in __nfsd4_write_time, |
| 972 | * so we can use 32-bit math on it. Warn if that assumption |
| 973 | * ever stops being true. |
| 974 | */ |
| 975 | if (WARN_ON_ONCE(nn->nfsd4_lease > 3600)) |
| 976 | return 360 * HZ; |
| 977 | |
| 978 | return max(((u32)nn->nfsd4_lease)/10, 1u) * HZ; |
J. Bruce Fields | 595947a | 2009-03-05 17:18:10 -0500 | [diff] [blame] | 979 | } |
| 980 | |
Trond Myklebust | 2bbfed9 | 2019-10-23 17:43:18 -0400 | [diff] [blame] | 981 | static bool nfsd4_queue_cb(struct nfsd4_callback *cb) |
| 982 | { |
Chuck Lever | 38f080f | 2024-04-01 16:05:39 -0400 | [diff] [blame] | 983 | struct nfs4_client *clp = cb->cb_clp; |
| 984 | |
| 985 | trace_nfsd_cb_queue(clp, cb); |
| 986 | return queue_work(clp->cl_callback_wq, &cb->cb_work); |
Trond Myklebust | 2bbfed9 | 2019-10-23 17:43:18 -0400 | [diff] [blame] | 987 | } |
| 988 | |
| 989 | static void nfsd41_cb_inflight_begin(struct nfs4_client *clp) |
| 990 | { |
| 991 | atomic_inc(&clp->cl_cb_inflight); |
| 992 | } |
| 993 | |
| 994 | static void nfsd41_cb_inflight_end(struct nfs4_client *clp) |
| 995 | { |
| 996 | |
| 997 | if (atomic_dec_and_test(&clp->cl_cb_inflight)) |
| 998 | wake_up_var(&clp->cl_cb_inflight); |
| 999 | } |
| 1000 | |
| 1001 | static void nfsd41_cb_inflight_wait_complete(struct nfs4_client *clp) |
| 1002 | { |
| 1003 | wait_var_event(&clp->cl_cb_inflight, |
| 1004 | !atomic_read(&clp->cl_cb_inflight)); |
| 1005 | } |
| 1006 | |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 1007 | static const struct cred *get_backchannel_cred(struct nfs4_client *clp, struct rpc_clnt *client, struct nfsd4_session *ses) |
J. Bruce Fields | c6bb3ca | 2012-11-01 16:31:02 -0400 | [diff] [blame] | 1008 | { |
| 1009 | if (clp->cl_minorversion == 0) { |
NeilBrown | 5e16923 | 2018-12-03 11:30:30 +1100 | [diff] [blame] | 1010 | client->cl_principal = clp->cl_cred.cr_targ_princ ? |
| 1011 | clp->cl_cred.cr_targ_princ : "nfs"; |
Chuck Lever | cb25e7b | 2018-08-16 12:06:04 -0400 | [diff] [blame] | 1012 | |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 1013 | return get_cred(rpc_machine_cred()); |
J. Bruce Fields | c6bb3ca | 2012-11-01 16:31:02 -0400 | [diff] [blame] | 1014 | } else { |
NeilBrown | 97f68c6b | 2018-12-03 11:30:30 +1100 | [diff] [blame] | 1015 | struct cred *kcred; |
NeilBrown | 97f68c6b | 2018-12-03 11:30:30 +1100 | [diff] [blame] | 1016 | |
Kees Cook | 5a17f04 | 2022-10-26 16:31:11 -0700 | [diff] [blame] | 1017 | kcred = prepare_kernel_cred(&init_task); |
NeilBrown | 97f68c6b | 2018-12-03 11:30:30 +1100 | [diff] [blame] | 1018 | if (!kcred) |
| 1019 | return NULL; |
J. Bruce Fields | c6bb3ca | 2012-11-01 16:31:02 -0400 | [diff] [blame] | 1020 | |
Dai Ngo | 7de82c2 | 2023-04-01 13:22:08 -0700 | [diff] [blame] | 1021 | kcred->fsuid = ses->se_cb_sec.uid; |
| 1022 | kcred->fsgid = ses->se_cb_sec.gid; |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 1023 | return kcred; |
J. Bruce Fields | c6bb3ca | 2012-11-01 16:31:02 -0400 | [diff] [blame] | 1024 | } |
| 1025 | } |
J. Bruce Fields | 2b47eec | 2007-07-27 18:06:50 -0400 | [diff] [blame] | 1026 | |
J. Bruce Fields | dcbeaa6 | 2010-06-15 17:25:45 -0400 | [diff] [blame] | 1027 | static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *conn, struct nfsd4_session *ses) |
J. Bruce Fields | 2b47eec | 2007-07-27 18:06:50 -0400 | [diff] [blame] | 1028 | { |
Jeff Layton | 3758cf7 | 2014-04-15 08:51:48 -0400 | [diff] [blame] | 1029 | int maxtime = max_cb_time(clp->net); |
Chuck Lever | ae5c794 | 2006-08-22 20:06:21 -0400 | [diff] [blame] | 1030 | struct rpc_timeout timeparms = { |
Jeff Layton | 3758cf7 | 2014-04-15 08:51:48 -0400 | [diff] [blame] | 1031 | .to_initval = maxtime, |
J. Bruce Fields | 595947a | 2009-03-05 17:18:10 -0500 | [diff] [blame] | 1032 | .to_retries = 0, |
Jeff Layton | 3758cf7 | 2014-04-15 08:51:48 -0400 | [diff] [blame] | 1033 | .to_maxval = maxtime, |
Chuck Lever | ae5c794 | 2006-08-22 20:06:21 -0400 | [diff] [blame] | 1034 | }; |
Chuck Lever | ae5c794 | 2006-08-22 20:06:21 -0400 | [diff] [blame] | 1035 | struct rpc_create_args args = { |
Stanislav Kinsbursky | c212cec | 2012-11-14 18:21:10 +0300 | [diff] [blame] | 1036 | .net = clp->net, |
J. Bruce Fields | 07263f1 | 2010-05-31 19:09:40 -0400 | [diff] [blame] | 1037 | .address = (struct sockaddr *) &conn->cb_addr, |
| 1038 | .addrsize = conn->cb_addrlen, |
Takuma Umeya | 6f3d772 | 2010-12-15 14:09:01 +0900 | [diff] [blame] | 1039 | .saddress = (struct sockaddr *) &conn->cb_saddr, |
Chuck Lever | ae5c794 | 2006-08-22 20:06:21 -0400 | [diff] [blame] | 1040 | .timeout = &timeparms, |
Olga Kornievskaia | ff7d975 | 2008-03-28 16:04:56 -0400 | [diff] [blame] | 1041 | .program = &cb_program, |
Trond Myklebust | eff7936 | 2017-07-16 22:57:27 +0000 | [diff] [blame] | 1042 | .version = 1, |
Olga Kornievskaia | b6b6152 | 2008-06-09 16:51:31 -0400 | [diff] [blame] | 1043 | .flags = (RPC_CLNT_CREATE_NOPING | RPC_CLNT_CREATE_QUIET), |
Trond Myklebust | 79caa5f | 2019-04-24 17:46:42 -0400 | [diff] [blame] | 1044 | .cred = current_cred(), |
Chuck Lever | ae5c794 | 2006-08-22 20:06:21 -0400 | [diff] [blame] | 1045 | }; |
J. Bruce Fields | 63c8671 | 2007-10-25 19:00:26 -0400 | [diff] [blame] | 1046 | struct rpc_clnt *client; |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 1047 | const struct cred *cred; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1048 | |
J. Bruce Fields | 5d18c1c | 2010-10-19 23:00:12 -0400 | [diff] [blame] | 1049 | if (clp->cl_minorversion == 0) { |
J. Bruce Fields | 03a4e1f | 2012-05-14 19:55:22 -0400 | [diff] [blame] | 1050 | if (!clp->cl_cred.cr_principal && |
Chuck Lever | 1eace0d | 2020-04-05 14:15:29 -0400 | [diff] [blame] | 1051 | (clp->cl_cred.cr_flavor >= RPC_AUTH_GSS_KRB5)) { |
| 1052 | trace_nfsd_cb_setup_err(clp, -EINVAL); |
J. Bruce Fields | 5d18c1c | 2010-10-19 23:00:12 -0400 | [diff] [blame] | 1053 | return -EINVAL; |
Chuck Lever | 1eace0d | 2020-04-05 14:15:29 -0400 | [diff] [blame] | 1054 | } |
J. Bruce Fields | 03a4e1f | 2012-05-14 19:55:22 -0400 | [diff] [blame] | 1055 | args.client_name = clp->cl_cred.cr_principal; |
Himangi Saraogi | fc8e5a6 | 2014-07-23 20:12:31 +0530 | [diff] [blame] | 1056 | args.prognumber = conn->cb_prog; |
J. Bruce Fields | 5d18c1c | 2010-10-19 23:00:12 -0400 | [diff] [blame] | 1057 | args.protocol = XPRT_TRANSPORT_TCP; |
J. Bruce Fields | 3930765 | 2012-08-16 17:01:21 -0400 | [diff] [blame] | 1058 | args.authflavor = clp->cl_cred.cr_flavor; |
J. Bruce Fields | 5d18c1c | 2010-10-19 23:00:12 -0400 | [diff] [blame] | 1059 | clp->cl_cb_ident = conn->cb_ident; |
| 1060 | } else { |
Chuck Lever | 9f57c60 | 2021-05-14 15:56:56 -0400 | [diff] [blame] | 1061 | if (!conn->cb_xprt) |
J. Bruce Fields | dcbeaa6 | 2010-06-15 17:25:45 -0400 | [diff] [blame] | 1062 | return -EINVAL; |
J. Bruce Fields | dcbeaa6 | 2010-06-15 17:25:45 -0400 | [diff] [blame] | 1063 | clp->cl_cb_session = ses; |
J. Bruce Fields | 07263f1 | 2010-05-31 19:09:40 -0400 | [diff] [blame] | 1064 | args.bc_xprt = conn->cb_xprt; |
J. Bruce Fields | 8b5ce5c | 2010-10-19 17:31:50 -0400 | [diff] [blame] | 1065 | args.prognumber = clp->cl_cb_session->se_cb_prog; |
Chuck Lever | 3c45ddf | 2014-07-16 15:38:32 -0400 | [diff] [blame] | 1066 | args.protocol = conn->cb_xprt->xpt_class->xcl_ident | |
| 1067 | XPRT_TRANSPORT_BC; |
J. Bruce Fields | 12fc3e9 | 2012-11-05 16:01:48 -0500 | [diff] [blame] | 1068 | args.authflavor = ses->se_cb_sec.flavor; |
Alexandros Batsakis | 3ddc8bf | 2009-09-10 12:27:21 +0300 | [diff] [blame] | 1069 | } |
Chuck Lever | ae5c794 | 2006-08-22 20:06:21 -0400 | [diff] [blame] | 1070 | /* Create RPC client */ |
J. Bruce Fields | d50039e | 2016-05-16 17:03:42 -0400 | [diff] [blame] | 1071 | client = rpc_create(&args); |
J. Bruce Fields | e1cab5a5 | 2009-02-23 10:45:27 -0800 | [diff] [blame] | 1072 | if (IS_ERR(client)) { |
Chuck Lever | 1eace0d | 2020-04-05 14:15:29 -0400 | [diff] [blame] | 1073 | trace_nfsd_cb_setup_err(clp, PTR_ERR(client)); |
J. Bruce Fields | e1cab5a5 | 2009-02-23 10:45:27 -0800 | [diff] [blame] | 1074 | return PTR_ERR(client); |
| 1075 | } |
J. Bruce Fields | c6bb3ca | 2012-11-01 16:31:02 -0400 | [diff] [blame] | 1076 | cred = get_backchannel_cred(clp, client, ses); |
Dan Carpenter | 1c3da44 | 2019-01-04 09:47:03 +0300 | [diff] [blame] | 1077 | if (!cred) { |
Chuck Lever | 1eace0d | 2020-04-05 14:15:29 -0400 | [diff] [blame] | 1078 | trace_nfsd_cb_setup_err(clp, -ENOMEM); |
J. Bruce Fields | c6bb3ca | 2012-11-01 16:31:02 -0400 | [diff] [blame] | 1079 | rpc_shutdown_client(client); |
Dan Carpenter | 1c3da44 | 2019-01-04 09:47:03 +0300 | [diff] [blame] | 1080 | return -ENOMEM; |
J. Bruce Fields | c6bb3ca | 2012-11-01 16:31:02 -0400 | [diff] [blame] | 1081 | } |
Dan Aloni | 3bc8edc | 2022-12-12 13:11:06 +0200 | [diff] [blame] | 1082 | |
| 1083 | if (clp->cl_minorversion != 0) |
| 1084 | clp->cl_cb_conn.cb_xprt = conn->cb_xprt; |
J. Bruce Fields | 6ff8da0 | 2010-06-04 20:04:45 -0400 | [diff] [blame] | 1085 | clp->cl_cb_client = client; |
J. Bruce Fields | c6bb3ca | 2012-11-01 16:31:02 -0400 | [diff] [blame] | 1086 | clp->cl_cb_cred = cred; |
J. Bruce Fields | 05570a2 | 2021-06-14 11:20:49 -0400 | [diff] [blame] | 1087 | rcu_read_lock(); |
Chuck Lever | 3c92fba | 2021-05-14 15:57:02 -0400 | [diff] [blame] | 1088 | trace_nfsd_cb_setup(clp, rpc_peeraddr2str(client, RPC_DISPLAY_NETID), |
| 1089 | args.authflavor); |
J. Bruce Fields | 05570a2 | 2021-06-14 11:20:49 -0400 | [diff] [blame] | 1090 | rcu_read_unlock(); |
J. Bruce Fields | e1cab5a5 | 2009-02-23 10:45:27 -0800 | [diff] [blame] | 1091 | return 0; |
J. Bruce Fields | a601cae | 2009-02-22 16:43:45 -0800 | [diff] [blame] | 1092 | } |
| 1093 | |
Chuck Lever | 8476c69 | 2021-05-14 15:56:31 -0400 | [diff] [blame] | 1094 | static void nfsd4_mark_cb_state(struct nfs4_client *clp, int newstate) |
| 1095 | { |
| 1096 | if (clp->cl_cb_state != newstate) { |
| 1097 | clp->cl_cb_state = newstate; |
Chuck Lever | a7cdf06 | 2024-01-26 12:45:54 -0500 | [diff] [blame] | 1098 | trace_nfsd_cb_new_state(clp); |
Chuck Lever | 8476c69 | 2021-05-14 15:56:31 -0400 | [diff] [blame] | 1099 | } |
| 1100 | } |
| 1101 | |
Chuck Lever | 627fb18 | 2024-01-26 12:46:13 -0500 | [diff] [blame] | 1102 | static void nfsd4_mark_cb_down(struct nfs4_client *clp) |
J. Bruce Fields | 77a3569 | 2010-04-30 18:51:44 -0400 | [diff] [blame] | 1103 | { |
J. Bruce Fields | d4f72cb | 2015-11-24 15:43:03 -0700 | [diff] [blame] | 1104 | if (test_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags)) |
| 1105 | return; |
Chuck Lever | 8476c69 | 2021-05-14 15:56:31 -0400 | [diff] [blame] | 1106 | nfsd4_mark_cb_state(clp, NFSD4_CB_DOWN); |
J. Bruce Fields | 77a3569 | 2010-04-30 18:51:44 -0400 | [diff] [blame] | 1107 | } |
| 1108 | |
Chuck Lever | 627fb18 | 2024-01-26 12:46:13 -0500 | [diff] [blame] | 1109 | static void nfsd4_mark_cb_fault(struct nfs4_client *clp) |
Benny Halevy | 5423732 | 2011-10-19 19:12:58 -0700 | [diff] [blame] | 1110 | { |
J. Bruce Fields | d4f72cb | 2015-11-24 15:43:03 -0700 | [diff] [blame] | 1111 | if (test_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags)) |
| 1112 | return; |
Chuck Lever | 8476c69 | 2021-05-14 15:56:31 -0400 | [diff] [blame] | 1113 | nfsd4_mark_cb_state(clp, NFSD4_CB_FAULT); |
Benny Halevy | 5423732 | 2011-10-19 19:12:58 -0700 | [diff] [blame] | 1114 | } |
| 1115 | |
J. Bruce Fields | e300a63 | 2009-03-05 15:01:11 -0500 | [diff] [blame] | 1116 | static void nfsd4_cb_probe_done(struct rpc_task *task, void *calldata) |
| 1117 | { |
J. Bruce Fields | cee277d | 2010-05-26 17:52:14 -0400 | [diff] [blame] | 1118 | struct nfs4_client *clp = container_of(calldata, struct nfs4_client, cl_cb_null); |
J. Bruce Fields | e300a63 | 2009-03-05 15:01:11 -0500 | [diff] [blame] | 1119 | |
| 1120 | if (task->tk_status) |
Chuck Lever | 627fb18 | 2024-01-26 12:46:13 -0500 | [diff] [blame] | 1121 | nfsd4_mark_cb_down(clp); |
Chuck Lever | 8476c69 | 2021-05-14 15:56:31 -0400 | [diff] [blame] | 1122 | else |
| 1123 | nfsd4_mark_cb_state(clp, NFSD4_CB_UP); |
J. Bruce Fields | e300a63 | 2009-03-05 15:01:11 -0500 | [diff] [blame] | 1124 | } |
| 1125 | |
Trond Myklebust | 2bbfed9 | 2019-10-23 17:43:18 -0400 | [diff] [blame] | 1126 | static void nfsd4_cb_probe_release(void *calldata) |
| 1127 | { |
| 1128 | struct nfs4_client *clp = container_of(calldata, struct nfs4_client, cl_cb_null); |
| 1129 | |
| 1130 | nfsd41_cb_inflight_end(clp); |
| 1131 | |
| 1132 | } |
| 1133 | |
J. Bruce Fields | e300a63 | 2009-03-05 15:01:11 -0500 | [diff] [blame] | 1134 | static const struct rpc_call_ops nfsd4_cb_probe_ops = { |
J. Bruce Fields | cee277d | 2010-05-26 17:52:14 -0400 | [diff] [blame] | 1135 | /* XXX: release method to ensure we set the cb channel down if |
| 1136 | * necessary on early failure? */ |
J. Bruce Fields | e300a63 | 2009-03-05 15:01:11 -0500 | [diff] [blame] | 1137 | .rpc_call_done = nfsd4_cb_probe_done, |
Trond Myklebust | 2bbfed9 | 2019-10-23 17:43:18 -0400 | [diff] [blame] | 1138 | .rpc_release = nfsd4_cb_probe_release, |
J. Bruce Fields | e300a63 | 2009-03-05 15:01:11 -0500 | [diff] [blame] | 1139 | }; |
| 1140 | |
J. Bruce Fields | 63c8671 | 2007-10-25 19:00:26 -0400 | [diff] [blame] | 1141 | /* |
J. Bruce Fields | 5a3c9d7 | 2010-10-19 17:56:52 -0400 | [diff] [blame] | 1142 | * Poke the callback thread to process any updates to the callback |
| 1143 | * parameters, and send a null probe. |
J. Bruce Fields | 63c8671 | 2007-10-25 19:00:26 -0400 | [diff] [blame] | 1144 | */ |
J. Bruce Fields | 5a3c9d7 | 2010-10-19 17:56:52 -0400 | [diff] [blame] | 1145 | void nfsd4_probe_callback(struct nfs4_client *clp) |
| 1146 | { |
Chuck Lever | 4ade892 | 2021-05-14 15:57:26 -0400 | [diff] [blame] | 1147 | trace_nfsd_cb_probe(clp); |
Chuck Lever | 8476c69 | 2021-05-14 15:56:31 -0400 | [diff] [blame] | 1148 | nfsd4_mark_cb_state(clp, NFSD4_CB_UNKNOWN); |
Jeff Layton | a52d726 | 2012-03-21 09:52:02 -0400 | [diff] [blame] | 1149 | set_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags); |
Christoph Hellwig | f0b5de1 | 2014-09-24 12:19:18 +0200 | [diff] [blame] | 1150 | nfsd4_run_cb(&clp->cl_cb_null); |
J. Bruce Fields | 5a3c9d7 | 2010-10-19 17:56:52 -0400 | [diff] [blame] | 1151 | } |
| 1152 | |
J. Bruce Fields | 84f5f7c | 2010-12-09 15:52:19 -0500 | [diff] [blame] | 1153 | void nfsd4_probe_callback_sync(struct nfs4_client *clp) |
| 1154 | { |
| 1155 | nfsd4_probe_callback(clp); |
Chuck Lever | 38f080f | 2024-04-01 16:05:39 -0400 | [diff] [blame] | 1156 | flush_workqueue(clp->cl_callback_wq); |
J. Bruce Fields | 84f5f7c | 2010-12-09 15:52:19 -0500 | [diff] [blame] | 1157 | } |
| 1158 | |
J. Bruce Fields | 5a3c9d7 | 2010-10-19 17:56:52 -0400 | [diff] [blame] | 1159 | void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *conn) |
J. Bruce Fields | 63c8671 | 2007-10-25 19:00:26 -0400 | [diff] [blame] | 1160 | { |
Chuck Lever | 8476c69 | 2021-05-14 15:56:31 -0400 | [diff] [blame] | 1161 | nfsd4_mark_cb_state(clp, NFSD4_CB_UNKNOWN); |
J. Bruce Fields | 6ff8da0 | 2010-06-04 20:04:45 -0400 | [diff] [blame] | 1162 | spin_lock(&clp->cl_lock); |
| 1163 | memcpy(&clp->cl_cb_conn, conn, sizeof(struct nfs4_cb_conn)); |
J. Bruce Fields | 6ff8da0 | 2010-06-04 20:04:45 -0400 | [diff] [blame] | 1164 | spin_unlock(&clp->cl_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | } |
| 1166 | |
Ricardo Labiaga | 2a1d1b5 | 2009-09-10 12:26:38 +0300 | [diff] [blame] | 1167 | /* |
| 1168 | * There's currently a single callback channel slot. |
| 1169 | * If the slot is available, then mark it busy. Otherwise, set the |
| 1170 | * thread for sleeping on the callback RPC wait queue. |
| 1171 | */ |
Trond Myklebust | 12357f1 | 2019-11-07 17:11:57 -0500 | [diff] [blame] | 1172 | static bool nfsd41_cb_get_slot(struct nfsd4_callback *cb, struct rpc_task *task) |
Ricardo Labiaga | 2a1d1b5 | 2009-09-10 12:26:38 +0300 | [diff] [blame] | 1173 | { |
Trond Myklebust | 12357f1 | 2019-11-07 17:11:57 -0500 | [diff] [blame] | 1174 | struct nfs4_client *clp = cb->cb_clp; |
| 1175 | |
| 1176 | if (!cb->cb_holds_slot && |
| 1177 | test_and_set_bit(0, &clp->cl_cb_slot_busy) != 0) { |
Ricardo Labiaga | 2a1d1b5 | 2009-09-10 12:26:38 +0300 | [diff] [blame] | 1178 | rpc_sleep_on(&clp->cl_cb_waitq, task, NULL); |
Trond Myklebust | c6c15e1 | 2014-11-19 12:47:50 -0500 | [diff] [blame] | 1179 | /* Race breaker */ |
| 1180 | if (test_and_set_bit(0, &clp->cl_cb_slot_busy) != 0) { |
| 1181 | dprintk("%s slot is busy\n", __func__); |
| 1182 | return false; |
| 1183 | } |
| 1184 | rpc_wake_up_queued_task(&clp->cl_cb_waitq, task); |
Ricardo Labiaga | 2a1d1b5 | 2009-09-10 12:26:38 +0300 | [diff] [blame] | 1185 | } |
Trond Myklebust | 12357f1 | 2019-11-07 17:11:57 -0500 | [diff] [blame] | 1186 | cb->cb_holds_slot = true; |
J. Bruce Fields | 3ff3600 | 2011-01-10 16:37:51 -0500 | [diff] [blame] | 1187 | return true; |
Ricardo Labiaga | 2a1d1b5 | 2009-09-10 12:26:38 +0300 | [diff] [blame] | 1188 | } |
| 1189 | |
Trond Myklebust | 12357f1 | 2019-11-07 17:11:57 -0500 | [diff] [blame] | 1190 | static void nfsd41_cb_release_slot(struct nfsd4_callback *cb) |
| 1191 | { |
| 1192 | struct nfs4_client *clp = cb->cb_clp; |
| 1193 | |
| 1194 | if (cb->cb_holds_slot) { |
| 1195 | cb->cb_holds_slot = false; |
| 1196 | clear_bit(0, &clp->cl_cb_slot_busy); |
| 1197 | rpc_wake_up_next(&clp->cl_cb_waitq); |
| 1198 | } |
| 1199 | } |
| 1200 | |
Trond Myklebust | 2bbfed9 | 2019-10-23 17:43:18 -0400 | [diff] [blame] | 1201 | static void nfsd41_destroy_cb(struct nfsd4_callback *cb) |
| 1202 | { |
| 1203 | struct nfs4_client *clp = cb->cb_clp; |
| 1204 | |
Chuck Lever | 9a026ae | 2024-01-26 12:46:01 -0500 | [diff] [blame] | 1205 | trace_nfsd_cb_destroy(clp, cb); |
Trond Myklebust | 2bbfed9 | 2019-10-23 17:43:18 -0400 | [diff] [blame] | 1206 | nfsd41_cb_release_slot(cb); |
| 1207 | if (cb->cb_ops && cb->cb_ops->release) |
| 1208 | cb->cb_ops->release(cb); |
| 1209 | nfsd41_cb_inflight_end(clp); |
| 1210 | } |
| 1211 | |
Ricardo Labiaga | 2a1d1b5 | 2009-09-10 12:26:38 +0300 | [diff] [blame] | 1212 | /* |
| 1213 | * TODO: cb_sequence should support referring call lists, cachethis, multiple |
| 1214 | * slots, and mark callback channel down on communication errors. |
| 1215 | */ |
| 1216 | static void nfsd4_cb_prepare(struct rpc_task *task, void *calldata) |
| 1217 | { |
J. Bruce Fields | 5878453 | 2010-05-16 16:47:08 -0400 | [diff] [blame] | 1218 | struct nfsd4_callback *cb = calldata; |
J. Bruce Fields | 8be2d23 | 2013-03-21 10:59:29 -0400 | [diff] [blame] | 1219 | struct nfs4_client *clp = cb->cb_clp; |
J. Bruce Fields | 8323c3b | 2010-10-19 19:36:51 -0400 | [diff] [blame] | 1220 | u32 minorversion = clp->cl_minorversion; |
Ricardo Labiaga | 2a1d1b5 | 2009-09-10 12:26:38 +0300 | [diff] [blame] | 1221 | |
Kinglong Mee | 7ba6cad | 2015-06-24 16:33:37 +0800 | [diff] [blame] | 1222 | /* |
| 1223 | * cb_seq_status is only set in decode_cb_sequence4res, |
| 1224 | * and so will remain 1 if an rpc level failure occurs. |
| 1225 | */ |
| 1226 | cb->cb_seq_status = 1; |
Kinglong Mee | 4399396 | 2015-06-02 18:59:19 +0800 | [diff] [blame] | 1227 | cb->cb_status = 0; |
Trond Myklebust | 12357f1 | 2019-11-07 17:11:57 -0500 | [diff] [blame] | 1228 | if (minorversion && !nfsd41_cb_get_slot(cb, task)) |
| 1229 | return; |
Ricardo Labiaga | 2a1d1b5 | 2009-09-10 12:26:38 +0300 | [diff] [blame] | 1230 | rpc_call_start(task); |
| 1231 | } |
| 1232 | |
Kinglong Mee | 7ba6cad | 2015-06-24 16:33:37 +0800 | [diff] [blame] | 1233 | static bool nfsd4_cb_sequence_done(struct rpc_task *task, struct nfsd4_callback *cb) |
| 1234 | { |
| 1235 | struct nfs4_client *clp = cb->cb_clp; |
| 1236 | struct nfsd4_session *session = clp->cl_cb_session; |
| 1237 | bool ret = true; |
| 1238 | |
| 1239 | if (!clp->cl_minorversion) { |
| 1240 | /* |
| 1241 | * If the backchannel connection was shut down while this |
| 1242 | * task was queued, we need to resubmit it after setting up |
| 1243 | * a new backchannel connection. |
| 1244 | * |
| 1245 | * Note that if we lost our callback connection permanently |
| 1246 | * the submission code will error out, so we don't need to |
| 1247 | * handle that case here. |
| 1248 | */ |
Trond Myklebust | ae67bd3 | 2019-04-07 13:58:44 -0400 | [diff] [blame] | 1249 | if (RPC_SIGNALLED(task)) |
Kinglong Mee | 7ba6cad | 2015-06-24 16:33:37 +0800 | [diff] [blame] | 1250 | goto need_restart; |
| 1251 | |
| 1252 | return true; |
| 1253 | } |
| 1254 | |
Trond Myklebust | e6abc8c | 2019-04-05 08:54:37 -0700 | [diff] [blame] | 1255 | if (!cb->cb_holds_slot) |
| 1256 | goto need_restart; |
| 1257 | |
Chuck Lever | 8626664 | 2024-01-26 12:45:48 -0500 | [diff] [blame] | 1258 | /* This is the operation status code for CB_SEQUENCE */ |
| 1259 | trace_nfsd_cb_seq_status(task, cb); |
Kinglong Mee | 7ba6cad | 2015-06-24 16:33:37 +0800 | [diff] [blame] | 1260 | switch (cb->cb_seq_status) { |
| 1261 | case 0: |
| 1262 | /* |
| 1263 | * No need for lock, access serialized in nfsd4_cb_prepare |
| 1264 | * |
| 1265 | * RFC5661 20.9.3 |
| 1266 | * If CB_SEQUENCE returns an error, then the state of the slot |
| 1267 | * (sequence ID, cached reply) MUST NOT change. |
| 1268 | */ |
| 1269 | ++session->se_cb_seq_nr; |
| 1270 | break; |
| 1271 | case -ESERVERFAULT: |
| 1272 | ++session->se_cb_seq_nr; |
Chuck Lever | 627fb18 | 2024-01-26 12:46:13 -0500 | [diff] [blame] | 1273 | nfsd4_mark_cb_fault(cb->cb_clp); |
Kinglong Mee | 7ba6cad | 2015-06-24 16:33:37 +0800 | [diff] [blame] | 1274 | ret = false; |
| 1275 | break; |
Chuck Lever | 43b02db | 2024-01-26 12:45:36 -0500 | [diff] [blame] | 1276 | case 1: |
| 1277 | /* |
| 1278 | * cb_seq_status remains 1 if an RPC Reply was never |
| 1279 | * received. NFSD can't know if the client processed |
| 1280 | * the CB_SEQUENCE operation. Ask the client to send a |
| 1281 | * DESTROY_SESSION to recover. |
| 1282 | */ |
| 1283 | fallthrough; |
| 1284 | case -NFS4ERR_BADSESSION: |
Chuck Lever | 627fb18 | 2024-01-26 12:46:13 -0500 | [diff] [blame] | 1285 | nfsd4_mark_cb_fault(cb->cb_clp); |
Chuck Lever | 43b02db | 2024-01-26 12:45:36 -0500 | [diff] [blame] | 1286 | ret = false; |
| 1287 | goto need_restart; |
Kinglong Mee | 7ba6cad | 2015-06-24 16:33:37 +0800 | [diff] [blame] | 1288 | case -NFS4ERR_DELAY: |
Chuck Lever | 961b4b5 | 2024-01-26 12:45:17 -0500 | [diff] [blame] | 1289 | cb->cb_seq_status = 1; |
Kinglong Mee | 7ba6cad | 2015-06-24 16:33:37 +0800 | [diff] [blame] | 1290 | if (!rpc_restart_call(task)) |
| 1291 | goto out; |
| 1292 | |
| 1293 | rpc_delay(task, 2 * HZ); |
| 1294 | return false; |
| 1295 | case -NFS4ERR_BADSLOT: |
| 1296 | goto retry_nowait; |
| 1297 | case -NFS4ERR_SEQ_MISORDERED: |
| 1298 | if (session->se_cb_seq_nr != 1) { |
| 1299 | session->se_cb_seq_nr = 1; |
| 1300 | goto retry_nowait; |
| 1301 | } |
| 1302 | break; |
| 1303 | default: |
Chuck Lever | 627fb18 | 2024-01-26 12:46:13 -0500 | [diff] [blame] | 1304 | nfsd4_mark_cb_fault(cb->cb_clp); |
Kinglong Mee | 7ba6cad | 2015-06-24 16:33:37 +0800 | [diff] [blame] | 1305 | } |
Trond Myklebust | 12357f1 | 2019-11-07 17:11:57 -0500 | [diff] [blame] | 1306 | nfsd41_cb_release_slot(cb); |
Chuck Lever | 8626664 | 2024-01-26 12:45:48 -0500 | [diff] [blame] | 1307 | |
| 1308 | trace_nfsd_cb_free_slot(task, cb); |
Kinglong Mee | 7ba6cad | 2015-06-24 16:33:37 +0800 | [diff] [blame] | 1309 | |
Trond Myklebust | ae67bd3 | 2019-04-07 13:58:44 -0400 | [diff] [blame] | 1310 | if (RPC_SIGNALLED(task)) |
Kinglong Mee | 7ba6cad | 2015-06-24 16:33:37 +0800 | [diff] [blame] | 1311 | goto need_restart; |
| 1312 | out: |
| 1313 | return ret; |
| 1314 | retry_nowait: |
| 1315 | if (rpc_restart_call_prepare(task)) |
| 1316 | ret = false; |
| 1317 | goto out; |
| 1318 | need_restart: |
Trond Myklebust | 2bbfed9 | 2019-10-23 17:43:18 -0400 | [diff] [blame] | 1319 | if (!test_bit(NFSD4_CLIENT_CB_KILL, &clp->cl_flags)) { |
Chuck Lever | 9a026ae | 2024-01-26 12:46:01 -0500 | [diff] [blame] | 1320 | trace_nfsd_cb_restart(clp, cb); |
Trond Myklebust | 2bbfed9 | 2019-10-23 17:43:18 -0400 | [diff] [blame] | 1321 | task->tk_status = 0; |
| 1322 | cb->cb_need_restart = true; |
| 1323 | } |
Kinglong Mee | 7ba6cad | 2015-06-24 16:33:37 +0800 | [diff] [blame] | 1324 | return false; |
| 1325 | } |
| 1326 | |
Ricardo Labiaga | 0421b5c | 2009-09-10 12:27:04 +0300 | [diff] [blame] | 1327 | static void nfsd4_cb_done(struct rpc_task *task, void *calldata) |
| 1328 | { |
J. Bruce Fields | 5878453 | 2010-05-16 16:47:08 -0400 | [diff] [blame] | 1329 | struct nfsd4_callback *cb = calldata; |
J. Bruce Fields | 8be2d23 | 2013-03-21 10:59:29 -0400 | [diff] [blame] | 1330 | struct nfs4_client *clp = cb->cb_clp; |
Ricardo Labiaga | 0421b5c | 2009-09-10 12:27:04 +0300 | [diff] [blame] | 1331 | |
Kinglong Mee | 7ba6cad | 2015-06-24 16:33:37 +0800 | [diff] [blame] | 1332 | if (!nfsd4_cb_sequence_done(task, cb)) |
J. Bruce Fields | 4b21d0d | 2010-03-07 23:39:01 -0500 | [diff] [blame] | 1333 | return; |
J. Bruce Fields | 4b21d0d | 2010-03-07 23:39:01 -0500 | [diff] [blame] | 1334 | |
Christoph Hellwig | ef2a1b3 | 2015-04-30 11:49:23 +0200 | [diff] [blame] | 1335 | if (cb->cb_status) { |
| 1336 | WARN_ON_ONCE(task->tk_status); |
| 1337 | task->tk_status = cb->cb_status; |
| 1338 | } |
| 1339 | |
Christoph Hellwig | 0162ac2 | 2014-09-24 12:19:19 +0200 | [diff] [blame] | 1340 | switch (cb->cb_ops->done(cb, task)) { |
J. Bruce Fields | 172c85d | 2010-05-30 11:53:12 -0400 | [diff] [blame] | 1341 | case 0: |
Christoph Hellwig | 0162ac2 | 2014-09-24 12:19:19 +0200 | [diff] [blame] | 1342 | task->tk_status = 0; |
| 1343 | rpc_restart_call_prepare(task); |
| 1344 | return; |
| 1345 | case 1: |
Scott Mayhew | 1c73b9d | 2019-05-02 13:32:12 -0400 | [diff] [blame] | 1346 | switch (task->tk_status) { |
| 1347 | case -EIO: |
| 1348 | case -ETIMEDOUT: |
Olga Kornievskaia | b4250dd | 2021-03-11 10:55:00 -0500 | [diff] [blame] | 1349 | case -EACCES: |
Chuck Lever | 627fb18 | 2024-01-26 12:46:13 -0500 | [diff] [blame] | 1350 | nfsd4_mark_cb_down(clp); |
Scott Mayhew | 1c73b9d | 2019-05-02 13:32:12 -0400 | [diff] [blame] | 1351 | } |
Christoph Hellwig | 0162ac2 | 2014-09-24 12:19:19 +0200 | [diff] [blame] | 1352 | break; |
| 1353 | default: |
| 1354 | BUG(); |
J. Bruce Fields | 63e4863 | 2009-05-01 22:36:55 -0400 | [diff] [blame] | 1355 | } |
J. Bruce Fields | 63e4863 | 2009-05-01 22:36:55 -0400 | [diff] [blame] | 1356 | } |
| 1357 | |
Christoph Hellwig | 0162ac2 | 2014-09-24 12:19:19 +0200 | [diff] [blame] | 1358 | static void nfsd4_cb_release(void *calldata) |
J. Bruce Fields | 63e4863 | 2009-05-01 22:36:55 -0400 | [diff] [blame] | 1359 | { |
J. Bruce Fields | 5878453 | 2010-05-16 16:47:08 -0400 | [diff] [blame] | 1360 | struct nfsd4_callback *cb = calldata; |
J. Bruce Fields | 63e4863 | 2009-05-01 22:36:55 -0400 | [diff] [blame] | 1361 | |
Christoph Hellwig | cba5f62 | 2015-04-30 11:49:24 +0200 | [diff] [blame] | 1362 | if (cb->cb_need_restart) |
Trond Myklebust | 2bbfed9 | 2019-10-23 17:43:18 -0400 | [diff] [blame] | 1363 | nfsd4_queue_cb(cb); |
Christoph Hellwig | cba5f62 | 2015-04-30 11:49:24 +0200 | [diff] [blame] | 1364 | else |
Trond Myklebust | 2bbfed9 | 2019-10-23 17:43:18 -0400 | [diff] [blame] | 1365 | nfsd41_destroy_cb(cb); |
Christoph Hellwig | cba5f62 | 2015-04-30 11:49:24 +0200 | [diff] [blame] | 1366 | |
J. Bruce Fields | 63e4863 | 2009-05-01 22:36:55 -0400 | [diff] [blame] | 1367 | } |
| 1368 | |
Christoph Hellwig | 0162ac2 | 2014-09-24 12:19:19 +0200 | [diff] [blame] | 1369 | static const struct rpc_call_ops nfsd4_cb_ops = { |
Ricardo Labiaga | 2a1d1b5 | 2009-09-10 12:26:38 +0300 | [diff] [blame] | 1370 | .rpc_call_prepare = nfsd4_cb_prepare, |
Christoph Hellwig | 0162ac2 | 2014-09-24 12:19:19 +0200 | [diff] [blame] | 1371 | .rpc_call_done = nfsd4_cb_done, |
| 1372 | .rpc_release = nfsd4_cb_release, |
J. Bruce Fields | 63e4863 | 2009-05-01 22:36:55 -0400 | [diff] [blame] | 1373 | }; |
| 1374 | |
Benny Halevy | ab707e15 | 2010-05-12 00:14:06 +0300 | [diff] [blame] | 1375 | /* must be called under the state lock */ |
J. Bruce Fields | 6ff8da0 | 2010-06-04 20:04:45 -0400 | [diff] [blame] | 1376 | void nfsd4_shutdown_callback(struct nfs4_client *clp) |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 1377 | { |
Chuck Lever | b200f0e | 2021-05-14 15:56:49 -0400 | [diff] [blame] | 1378 | if (clp->cl_cb_state != NFSD4_CB_UNKNOWN) |
| 1379 | trace_nfsd_cb_shutdown(clp); |
| 1380 | |
Jeff Layton | a52d726 | 2012-03-21 09:52:02 -0400 | [diff] [blame] | 1381 | set_bit(NFSD4_CLIENT_CB_KILL, &clp->cl_flags); |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 1382 | /* |
J. Bruce Fields | 6ff8da0 | 2010-06-04 20:04:45 -0400 | [diff] [blame] | 1383 | * Note this won't actually result in a null callback; |
Jeff Layton | 02e1215 | 2014-07-16 10:31:57 -0400 | [diff] [blame] | 1384 | * instead, nfsd4_run_cb_null() will detect the killed |
J. Bruce Fields | 6ff8da0 | 2010-06-04 20:04:45 -0400 | [diff] [blame] | 1385 | * client, destroy the rpc client, and stop: |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 1386 | */ |
Christoph Hellwig | f0b5de1 | 2014-09-24 12:19:18 +0200 | [diff] [blame] | 1387 | nfsd4_run_cb(&clp->cl_cb_null); |
Chuck Lever | 38f080f | 2024-04-01 16:05:39 -0400 | [diff] [blame] | 1388 | flush_workqueue(clp->cl_callback_wq); |
Trond Myklebust | 2bbfed9 | 2019-10-23 17:43:18 -0400 | [diff] [blame] | 1389 | nfsd41_cb_inflight_wait_complete(clp); |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 1390 | } |
| 1391 | |
J. Bruce Fields | dcbeaa6 | 2010-06-15 17:25:45 -0400 | [diff] [blame] | 1392 | static struct nfsd4_conn * __nfsd4_find_backchannel(struct nfs4_client *clp) |
| 1393 | { |
| 1394 | struct nfsd4_session *s; |
| 1395 | struct nfsd4_conn *c; |
| 1396 | |
Chuck Lever | 112bdd5 | 2024-01-26 12:46:20 -0500 | [diff] [blame] | 1397 | lockdep_assert_held(&clp->cl_lock); |
| 1398 | |
J. Bruce Fields | dcbeaa6 | 2010-06-15 17:25:45 -0400 | [diff] [blame] | 1399 | list_for_each_entry(s, &clp->cl_sessions, se_perclnt) { |
| 1400 | list_for_each_entry(c, &s->se_conns, cn_persession) { |
| 1401 | if (c->cn_flags & NFS4_CDFC4_BACK) |
| 1402 | return c; |
| 1403 | } |
| 1404 | } |
| 1405 | return NULL; |
| 1406 | } |
| 1407 | |
J. Bruce Fields | cc1ce2f | 2019-10-29 16:02:18 -0400 | [diff] [blame] | 1408 | /* |
| 1409 | * Note there isn't a lot of locking in this code; instead we depend on |
Chuck Lever | 38f080f | 2024-04-01 16:05:39 -0400 | [diff] [blame] | 1410 | * the fact that it is run from clp->cl_callback_wq, which won't run two |
| 1411 | * work items at once. So, for example, clp->cl_callback_wq handles all |
| 1412 | * access of cl_cb_client and all calls to rpc_create or rpc_shutdown_client. |
J. Bruce Fields | cc1ce2f | 2019-10-29 16:02:18 -0400 | [diff] [blame] | 1413 | */ |
Kirill A. Shutemov | 65e4c89 | 2010-12-16 15:25:54 +0200 | [diff] [blame] | 1414 | static void nfsd4_process_cb_update(struct nfsd4_callback *cb) |
J. Bruce Fields | 6ff8da0 | 2010-06-04 20:04:45 -0400 | [diff] [blame] | 1415 | { |
| 1416 | struct nfs4_cb_conn conn; |
| 1417 | struct nfs4_client *clp = cb->cb_clp; |
J. Bruce Fields | dcbeaa6 | 2010-06-15 17:25:45 -0400 | [diff] [blame] | 1418 | struct nfsd4_session *ses = NULL; |
| 1419 | struct nfsd4_conn *c; |
J. Bruce Fields | 6ff8da0 | 2010-06-04 20:04:45 -0400 | [diff] [blame] | 1420 | int err; |
| 1421 | |
Chuck Lever | 9a026ae | 2024-01-26 12:46:01 -0500 | [diff] [blame] | 1422 | trace_nfsd_cb_bc_update(clp, cb); |
| 1423 | |
J. Bruce Fields | 6ff8da0 | 2010-06-04 20:04:45 -0400 | [diff] [blame] | 1424 | /* |
| 1425 | * This is either an update, or the client dying; in either case, |
| 1426 | * kill the old client: |
| 1427 | */ |
| 1428 | if (clp->cl_cb_client) { |
Chuck Lever | 9a026ae | 2024-01-26 12:46:01 -0500 | [diff] [blame] | 1429 | trace_nfsd_cb_bc_shutdown(clp, cb); |
J. Bruce Fields | 6ff8da0 | 2010-06-04 20:04:45 -0400 | [diff] [blame] | 1430 | rpc_shutdown_client(clp->cl_cb_client); |
| 1431 | clp->cl_cb_client = NULL; |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 1432 | put_cred(clp->cl_cb_cred); |
J. Bruce Fields | c6bb3ca | 2012-11-01 16:31:02 -0400 | [diff] [blame] | 1433 | clp->cl_cb_cred = NULL; |
J. Bruce Fields | 6ff8da0 | 2010-06-04 20:04:45 -0400 | [diff] [blame] | 1434 | } |
J. Bruce Fields | dcbeaa6 | 2010-06-15 17:25:45 -0400 | [diff] [blame] | 1435 | if (clp->cl_cb_conn.cb_xprt) { |
| 1436 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); |
| 1437 | clp->cl_cb_conn.cb_xprt = NULL; |
| 1438 | } |
Jeff Layton | a52d726 | 2012-03-21 09:52:02 -0400 | [diff] [blame] | 1439 | if (test_bit(NFSD4_CLIENT_CB_KILL, &clp->cl_flags)) |
J. Bruce Fields | 6ff8da0 | 2010-06-04 20:04:45 -0400 | [diff] [blame] | 1440 | return; |
Chuck Lever | 9a026ae | 2024-01-26 12:46:01 -0500 | [diff] [blame] | 1441 | |
J. Bruce Fields | 6ff8da0 | 2010-06-04 20:04:45 -0400 | [diff] [blame] | 1442 | spin_lock(&clp->cl_lock); |
| 1443 | /* |
| 1444 | * Only serialized callback code is allowed to clear these |
| 1445 | * flags; main nfsd code can only set them: |
| 1446 | */ |
Chuck Lever | 84ebf02 | 2024-01-26 12:46:26 -0500 | [diff] [blame] | 1447 | WARN_ON(!(clp->cl_flags & NFSD4_CLIENT_CB_FLAG_MASK)); |
Jeff Layton | a52d726 | 2012-03-21 09:52:02 -0400 | [diff] [blame] | 1448 | clear_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags); |
Chuck Lever | 84ebf02 | 2024-01-26 12:46:26 -0500 | [diff] [blame] | 1449 | |
J. Bruce Fields | 6ff8da0 | 2010-06-04 20:04:45 -0400 | [diff] [blame] | 1450 | memcpy(&conn, &cb->cb_clp->cl_cb_conn, sizeof(struct nfs4_cb_conn)); |
J. Bruce Fields | dcbeaa6 | 2010-06-15 17:25:45 -0400 | [diff] [blame] | 1451 | c = __nfsd4_find_backchannel(clp); |
| 1452 | if (c) { |
| 1453 | svc_xprt_get(c->cn_xprt); |
| 1454 | conn.cb_xprt = c->cn_xprt; |
| 1455 | ses = c->cn_session; |
| 1456 | } |
J. Bruce Fields | 6ff8da0 | 2010-06-04 20:04:45 -0400 | [diff] [blame] | 1457 | spin_unlock(&clp->cl_lock); |
| 1458 | |
J. Bruce Fields | dcbeaa6 | 2010-06-15 17:25:45 -0400 | [diff] [blame] | 1459 | err = setup_callback_client(clp, &conn, ses); |
J. Bruce Fields | 5ce8ba2 | 2011-01-10 16:44:41 -0500 | [diff] [blame] | 1460 | if (err) { |
Chuck Lever | 627fb18 | 2024-01-26 12:46:13 -0500 | [diff] [blame] | 1461 | nfsd4_mark_cb_down(clp); |
Xiyu Yang | a4abc6b | 2020-05-25 22:15:41 +0800 | [diff] [blame] | 1462 | if (c) |
| 1463 | svc_xprt_put(c->cn_xprt); |
J. Bruce Fields | 5ce8ba2 | 2011-01-10 16:44:41 -0500 | [diff] [blame] | 1464 | return; |
| 1465 | } |
J. Bruce Fields | 6ff8da0 | 2010-06-04 20:04:45 -0400 | [diff] [blame] | 1466 | } |
| 1467 | |
Jeff Layton | 02e1215 | 2014-07-16 10:31:57 -0400 | [diff] [blame] | 1468 | static void |
Christoph Hellwig | 0162ac2 | 2014-09-24 12:19:19 +0200 | [diff] [blame] | 1469 | nfsd4_run_cb_work(struct work_struct *work) |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 1470 | { |
Christoph Hellwig | 0162ac2 | 2014-09-24 12:19:19 +0200 | [diff] [blame] | 1471 | struct nfsd4_callback *cb = |
Chuck Lever | 8ddb714 | 2024-04-23 17:52:24 -0400 | [diff] [blame] | 1472 | container_of(work, struct nfsd4_callback, cb_work); |
J. Bruce Fields | fb00392 | 2010-05-31 18:21:37 -0400 | [diff] [blame] | 1473 | struct nfs4_client *clp = cb->cb_clp; |
J. Bruce Fields | 6ff8da0 | 2010-06-04 20:04:45 -0400 | [diff] [blame] | 1474 | struct rpc_clnt *clnt; |
Chuck Lever | 6221f1d | 2020-04-17 12:40:31 -0400 | [diff] [blame] | 1475 | int flags; |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 1476 | |
Chuck Lever | a7cdf06 | 2024-01-26 12:45:54 -0500 | [diff] [blame] | 1477 | trace_nfsd_cb_start(clp); |
Christoph Hellwig | 0162ac2 | 2014-09-24 12:19:19 +0200 | [diff] [blame] | 1478 | |
Jeff Layton | a52d726 | 2012-03-21 09:52:02 -0400 | [diff] [blame] | 1479 | if (clp->cl_flags & NFSD4_CLIENT_CB_FLAG_MASK) |
J. Bruce Fields | 6ff8da0 | 2010-06-04 20:04:45 -0400 | [diff] [blame] | 1480 | nfsd4_process_cb_update(cb); |
| 1481 | |
| 1482 | clnt = clp->cl_cb_client; |
| 1483 | if (!clnt) { |
Chuck Lever | 9c8ecb9 | 2024-04-23 17:48:43 -0400 | [diff] [blame] | 1484 | /* Callback channel broken, or client killed; give up: */ |
| 1485 | nfsd41_destroy_cb(cb); |
J. Bruce Fields | 6ff8da0 | 2010-06-04 20:04:45 -0400 | [diff] [blame] | 1486 | return; |
J. Bruce Fields | 5878453 | 2010-05-16 16:47:08 -0400 | [diff] [blame] | 1487 | } |
Christoph Hellwig | 4bd9e9b | 2015-04-30 11:49:25 +0200 | [diff] [blame] | 1488 | |
| 1489 | /* |
| 1490 | * Don't send probe messages for 4.1 or later. |
| 1491 | */ |
| 1492 | if (!cb->cb_ops && clp->cl_minorversion) { |
Chuck Lever | 8476c69 | 2021-05-14 15:56:31 -0400 | [diff] [blame] | 1493 | nfsd4_mark_cb_state(clp, NFSD4_CB_UP); |
Trond Myklebust | 2bbfed9 | 2019-10-23 17:43:18 -0400 | [diff] [blame] | 1494 | nfsd41_destroy_cb(cb); |
Christoph Hellwig | 4bd9e9b | 2015-04-30 11:49:25 +0200 | [diff] [blame] | 1495 | return; |
| 1496 | } |
| 1497 | |
Chuck Lever | c1ccfcf | 2024-01-26 12:45:29 -0500 | [diff] [blame] | 1498 | if (cb->cb_need_restart) { |
| 1499 | cb->cb_need_restart = false; |
| 1500 | } else { |
| 1501 | if (cb->cb_ops && cb->cb_ops->prepare) |
| 1502 | cb->cb_ops->prepare(cb); |
| 1503 | } |
J. Bruce Fields | c6bb3ca | 2012-11-01 16:31:02 -0400 | [diff] [blame] | 1504 | cb->cb_msg.rpc_cred = clp->cl_cb_cred; |
Chuck Lever | 6221f1d | 2020-04-17 12:40:31 -0400 | [diff] [blame] | 1505 | flags = clp->cl_minorversion ? RPC_TASK_NOCONNECT : RPC_TASK_SOFTCONN; |
| 1506 | rpc_call_async(clnt, &cb->cb_msg, RPC_TASK_SOFT | flags, |
Christoph Hellwig | 0162ac2 | 2014-09-24 12:19:19 +0200 | [diff] [blame] | 1507 | cb->cb_ops ? &nfsd4_cb_ops : &nfsd4_cb_probe_ops, cb); |
Jeff Layton | 02e1215 | 2014-07-16 10:31:57 -0400 | [diff] [blame] | 1508 | } |
| 1509 | |
Christoph Hellwig | f0b5de1 | 2014-09-24 12:19:18 +0200 | [diff] [blame] | 1510 | void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp, |
Julia Lawall | c4cb897 | 2015-11-21 22:57:39 +0100 | [diff] [blame] | 1511 | const struct nfsd4_callback_ops *ops, enum nfsd4_cb_op op) |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 1512 | { |
J. Bruce Fields | 5ce8ba2 | 2011-01-10 16:44:41 -0500 | [diff] [blame] | 1513 | cb->cb_clp = clp; |
Christoph Hellwig | 326129d | 2014-09-24 12:19:17 +0200 | [diff] [blame] | 1514 | cb->cb_msg.rpc_proc = &nfs4_cb_procedures[op]; |
J. Bruce Fields | fb00392 | 2010-05-31 18:21:37 -0400 | [diff] [blame] | 1515 | cb->cb_msg.rpc_argp = cb; |
| 1516 | cb->cb_msg.rpc_resp = cb; |
Christoph Hellwig | 0162ac2 | 2014-09-24 12:19:19 +0200 | [diff] [blame] | 1517 | cb->cb_ops = ops; |
Chuck Lever | 8ddb714 | 2024-04-23 17:52:24 -0400 | [diff] [blame] | 1518 | INIT_WORK(&cb->cb_work, nfsd4_run_cb_work); |
Christoph Hellwig | ef2a1b3 | 2015-04-30 11:49:23 +0200 | [diff] [blame] | 1519 | cb->cb_status = 0; |
Christoph Hellwig | cba5f62 | 2015-04-30 11:49:24 +0200 | [diff] [blame] | 1520 | cb->cb_need_restart = false; |
Trond Myklebust | e6abc8c | 2019-04-05 08:54:37 -0700 | [diff] [blame] | 1521 | cb->cb_holds_slot = false; |
Christoph Hellwig | f0b5de1 | 2014-09-24 12:19:18 +0200 | [diff] [blame] | 1522 | } |
J. Bruce Fields | 5ce8ba2 | 2011-01-10 16:44:41 -0500 | [diff] [blame] | 1523 | |
Jeff Layton | b95239c | 2022-09-26 14:41:01 -0400 | [diff] [blame] | 1524 | /** |
| 1525 | * nfsd4_run_cb - queue up a callback job to run |
| 1526 | * @cb: callback to queue |
| 1527 | * |
| 1528 | * Kick off a callback to do its thing. Returns false if it was already |
| 1529 | * on a queue, true otherwise. |
| 1530 | */ |
| 1531 | bool nfsd4_run_cb(struct nfsd4_callback *cb) |
Christoph Hellwig | f0b5de1 | 2014-09-24 12:19:18 +0200 | [diff] [blame] | 1532 | { |
Trond Myklebust | 2bbfed9 | 2019-10-23 17:43:18 -0400 | [diff] [blame] | 1533 | struct nfs4_client *clp = cb->cb_clp; |
Jeff Layton | b95239c | 2022-09-26 14:41:01 -0400 | [diff] [blame] | 1534 | bool queued; |
Trond Myklebust | 2bbfed9 | 2019-10-23 17:43:18 -0400 | [diff] [blame] | 1535 | |
| 1536 | nfsd41_cb_inflight_begin(clp); |
Jeff Layton | b95239c | 2022-09-26 14:41:01 -0400 | [diff] [blame] | 1537 | queued = nfsd4_queue_cb(cb); |
| 1538 | if (!queued) |
Trond Myklebust | 2bbfed9 | 2019-10-23 17:43:18 -0400 | [diff] [blame] | 1539 | nfsd41_cb_inflight_end(clp); |
Jeff Layton | b95239c | 2022-09-26 14:41:01 -0400 | [diff] [blame] | 1540 | return queued; |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 1541 | } |