| 1 | /* |
| 2 | * Server-side procedures for NFSv4. |
| 3 | * |
| 4 | * Copyright (c) 2002 The Regents of the University of Michigan. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Kendrick Smith <kmsmith@umich.edu> |
| 8 | * Andy Adamson <andros@umich.edu> |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer. |
| 16 | * 2. Redistributions in binary form must reproduce the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer in the |
| 18 | * documentation and/or other materials provided with the distribution. |
| 19 | * 3. Neither the name of the University nor the names of its |
| 20 | * contributors may be used to endorse or promote products derived |
| 21 | * from this software without specific prior written permission. |
| 22 | * |
| 23 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 24 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 25 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 26 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 30 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 31 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 32 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 33 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 34 | */ |
| 35 | #include <linux/file.h> |
| 36 | #include <linux/falloc.h> |
| 37 | #include <linux/slab.h> |
| 38 | |
| 39 | #include "idmap.h" |
| 40 | #include "cache.h" |
| 41 | #include "xdr4.h" |
| 42 | #include "vfs.h" |
| 43 | #include "current_stateid.h" |
| 44 | #include "netns.h" |
| 45 | #include "acl.h" |
| 46 | #include "pnfs.h" |
| 47 | #include "trace.h" |
| 48 | |
| 49 | #ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
| 50 | #include <linux/security.h> |
| 51 | |
| 52 | static inline void |
| 53 | nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) |
| 54 | { |
| 55 | struct inode *inode = resfh->fh_dentry->d_inode; |
| 56 | int status; |
| 57 | |
| 58 | mutex_lock(&inode->i_mutex); |
| 59 | status = security_inode_setsecctx(resfh->fh_dentry, |
| 60 | label->data, label->len); |
| 61 | mutex_unlock(&inode->i_mutex); |
| 62 | |
| 63 | if (status) |
| 64 | /* |
| 65 | * XXX: We should really fail the whole open, but we may |
| 66 | * already have created a new file, so it may be too |
| 67 | * late. For now this seems the least of evils: |
| 68 | */ |
| 69 | bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL; |
| 70 | |
| 71 | return; |
| 72 | } |
| 73 | #else |
| 74 | static inline void |
| 75 | nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) |
| 76 | { } |
| 77 | #endif |
| 78 | |
| 79 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
| 80 | |
| 81 | static u32 nfsd_attrmask[] = { |
| 82 | NFSD_WRITEABLE_ATTRS_WORD0, |
| 83 | NFSD_WRITEABLE_ATTRS_WORD1, |
| 84 | NFSD_WRITEABLE_ATTRS_WORD2 |
| 85 | }; |
| 86 | |
| 87 | static u32 nfsd41_ex_attrmask[] = { |
| 88 | NFSD_SUPPATTR_EXCLCREAT_WORD0, |
| 89 | NFSD_SUPPATTR_EXCLCREAT_WORD1, |
| 90 | NFSD_SUPPATTR_EXCLCREAT_WORD2 |
| 91 | }; |
| 92 | |
| 93 | static __be32 |
| 94 | check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 95 | u32 *bmval, u32 *writable) |
| 96 | { |
| 97 | struct dentry *dentry = cstate->current_fh.fh_dentry; |
| 98 | |
| 99 | /* |
| 100 | * Check about attributes are supported by the NFSv4 server or not. |
| 101 | * According to spec, unsupported attributes return ERR_ATTRNOTSUPP. |
| 102 | */ |
| 103 | if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) || |
| 104 | (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) || |
| 105 | (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion))) |
| 106 | return nfserr_attrnotsupp; |
| 107 | |
| 108 | /* |
| 109 | * Check FATTR4_WORD0_ACL can be supported |
| 110 | * in current environment or not. |
| 111 | */ |
| 112 | if (bmval[0] & FATTR4_WORD0_ACL) { |
| 113 | if (!IS_POSIXACL(dentry->d_inode)) |
| 114 | return nfserr_attrnotsupp; |
| 115 | } |
| 116 | |
| 117 | /* |
| 118 | * According to spec, read-only attributes return ERR_INVAL. |
| 119 | */ |
| 120 | if (writable) { |
| 121 | if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) || |
| 122 | (bmval[2] & ~writable[2])) |
| 123 | return nfserr_inval; |
| 124 | } |
| 125 | |
| 126 | return nfs_ok; |
| 127 | } |
| 128 | |
| 129 | static __be32 |
| 130 | nfsd4_check_open_attributes(struct svc_rqst *rqstp, |
| 131 | struct nfsd4_compound_state *cstate, struct nfsd4_open *open) |
| 132 | { |
| 133 | __be32 status = nfs_ok; |
| 134 | |
| 135 | if (open->op_create == NFS4_OPEN_CREATE) { |
| 136 | if (open->op_createmode == NFS4_CREATE_UNCHECKED |
| 137 | || open->op_createmode == NFS4_CREATE_GUARDED) |
| 138 | status = check_attr_support(rqstp, cstate, |
| 139 | open->op_bmval, nfsd_attrmask); |
| 140 | else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) |
| 141 | status = check_attr_support(rqstp, cstate, |
| 142 | open->op_bmval, nfsd41_ex_attrmask); |
| 143 | } |
| 144 | |
| 145 | return status; |
| 146 | } |
| 147 | |
| 148 | static int |
| 149 | is_create_with_attrs(struct nfsd4_open *open) |
| 150 | { |
| 151 | return open->op_create == NFS4_OPEN_CREATE |
| 152 | && (open->op_createmode == NFS4_CREATE_UNCHECKED |
| 153 | || open->op_createmode == NFS4_CREATE_GUARDED |
| 154 | || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1); |
| 155 | } |
| 156 | |
| 157 | /* |
| 158 | * if error occurs when setting the acl, just clear the acl bit |
| 159 | * in the returned attr bitmap. |
| 160 | */ |
| 161 | static void |
| 162 | do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, |
| 163 | struct nfs4_acl *acl, u32 *bmval) |
| 164 | { |
| 165 | __be32 status; |
| 166 | |
| 167 | status = nfsd4_set_nfs4_acl(rqstp, fhp, acl); |
| 168 | if (status) |
| 169 | /* |
| 170 | * We should probably fail the whole open at this point, |
| 171 | * but we've already created the file, so it's too late; |
| 172 | * So this seems the least of evils: |
| 173 | */ |
| 174 | bmval[0] &= ~FATTR4_WORD0_ACL; |
| 175 | } |
| 176 | |
| 177 | static inline void |
| 178 | fh_dup2(struct svc_fh *dst, struct svc_fh *src) |
| 179 | { |
| 180 | fh_put(dst); |
| 181 | dget(src->fh_dentry); |
| 182 | if (src->fh_export) |
| 183 | exp_get(src->fh_export); |
| 184 | *dst = *src; |
| 185 | } |
| 186 | |
| 187 | static __be32 |
| 188 | do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) |
| 189 | { |
| 190 | __be32 status; |
| 191 | |
| 192 | if (open->op_truncate && |
| 193 | !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) |
| 194 | return nfserr_inval; |
| 195 | |
| 196 | accmode |= NFSD_MAY_READ_IF_EXEC; |
| 197 | |
| 198 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
| 199 | accmode |= NFSD_MAY_READ; |
| 200 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
| 201 | accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); |
| 202 | if (open->op_share_deny & NFS4_SHARE_DENY_READ) |
| 203 | accmode |= NFSD_MAY_WRITE; |
| 204 | |
| 205 | status = fh_verify(rqstp, current_fh, S_IFREG, accmode); |
| 206 | |
| 207 | return status; |
| 208 | } |
| 209 | |
| 210 | static __be32 nfsd_check_obj_isreg(struct svc_fh *fh) |
| 211 | { |
| 212 | umode_t mode = fh->fh_dentry->d_inode->i_mode; |
| 213 | |
| 214 | if (S_ISREG(mode)) |
| 215 | return nfs_ok; |
| 216 | if (S_ISDIR(mode)) |
| 217 | return nfserr_isdir; |
| 218 | /* |
| 219 | * Using err_symlink as our catch-all case may look odd; but |
| 220 | * there's no other obvious error for this case in 4.0, and we |
| 221 | * happen to know that it will cause the linux v4 client to do |
| 222 | * the right thing on attempts to open something other than a |
| 223 | * regular file. |
| 224 | */ |
| 225 | return nfserr_symlink; |
| 226 | } |
| 227 | |
| 228 | static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh) |
| 229 | { |
| 230 | if (nfsd4_has_session(cstate)) |
| 231 | return; |
| 232 | fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, |
| 233 | &resfh->fh_handle); |
| 234 | } |
| 235 | |
| 236 | static __be32 |
| 237 | do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh) |
| 238 | { |
| 239 | struct svc_fh *current_fh = &cstate->current_fh; |
| 240 | int accmode; |
| 241 | __be32 status; |
| 242 | |
| 243 | *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); |
| 244 | if (!*resfh) |
| 245 | return nfserr_jukebox; |
| 246 | fh_init(*resfh, NFS4_FHSIZE); |
| 247 | open->op_truncate = 0; |
| 248 | |
| 249 | if (open->op_create) { |
| 250 | /* FIXME: check session persistence and pnfs flags. |
| 251 | * The nfsv4.1 spec requires the following semantics: |
| 252 | * |
| 253 | * Persistent | pNFS | Server REQUIRED | Client Allowed |
| 254 | * Reply Cache | server | | |
| 255 | * -------------+--------+-----------------+-------------------- |
| 256 | * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 |
| 257 | * | | | (SHOULD) |
| 258 | * | | and EXCLUSIVE4 | or EXCLUSIVE4 |
| 259 | * | | | (SHOULD NOT) |
| 260 | * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 |
| 261 | * yes | no | GUARDED4 | GUARDED4 |
| 262 | * yes | yes | GUARDED4 | GUARDED4 |
| 263 | */ |
| 264 | |
| 265 | /* |
| 266 | * Note: create modes (UNCHECKED,GUARDED...) are the same |
| 267 | * in NFSv4 as in v3 except EXCLUSIVE4_1. |
| 268 | */ |
| 269 | status = do_nfsd_create(rqstp, current_fh, open->op_fname.data, |
| 270 | open->op_fname.len, &open->op_iattr, |
| 271 | *resfh, open->op_createmode, |
| 272 | (u32 *)open->op_verf.data, |
| 273 | &open->op_truncate, &open->op_created); |
| 274 | |
| 275 | if (!status && open->op_label.len) |
| 276 | nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval); |
| 277 | |
| 278 | /* |
| 279 | * Following rfc 3530 14.2.16, use the returned bitmask |
| 280 | * to indicate which attributes we used to store the |
| 281 | * verifier: |
| 282 | */ |
| 283 | if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0) |
| 284 | open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS | |
| 285 | FATTR4_WORD1_TIME_MODIFY); |
| 286 | } else |
| 287 | /* |
| 288 | * Note this may exit with the parent still locked. |
| 289 | * We will hold the lock until nfsd4_open's final |
| 290 | * lookup, to prevent renames or unlinks until we've had |
| 291 | * a chance to an acquire a delegation if appropriate. |
| 292 | */ |
| 293 | status = nfsd_lookup(rqstp, current_fh, |
| 294 | open->op_fname.data, open->op_fname.len, *resfh); |
| 295 | if (status) |
| 296 | goto out; |
| 297 | status = nfsd_check_obj_isreg(*resfh); |
| 298 | if (status) |
| 299 | goto out; |
| 300 | |
| 301 | if (is_create_with_attrs(open) && open->op_acl != NULL) |
| 302 | do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval); |
| 303 | |
| 304 | nfsd4_set_open_owner_reply_cache(cstate, open, *resfh); |
| 305 | accmode = NFSD_MAY_NOP; |
| 306 | if (open->op_created || |
| 307 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) |
| 308 | accmode |= NFSD_MAY_OWNER_OVERRIDE; |
| 309 | status = do_open_permission(rqstp, *resfh, open, accmode); |
| 310 | set_change_info(&open->op_cinfo, current_fh); |
| 311 | out: |
| 312 | return status; |
| 313 | } |
| 314 | |
| 315 | static __be32 |
| 316 | do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) |
| 317 | { |
| 318 | struct svc_fh *current_fh = &cstate->current_fh; |
| 319 | __be32 status; |
| 320 | int accmode = 0; |
| 321 | |
| 322 | /* We don't know the target directory, and therefore can not |
| 323 | * set the change info |
| 324 | */ |
| 325 | |
| 326 | memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); |
| 327 | |
| 328 | nfsd4_set_open_owner_reply_cache(cstate, open, current_fh); |
| 329 | |
| 330 | open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && |
| 331 | (open->op_iattr.ia_size == 0); |
| 332 | /* |
| 333 | * In the delegation case, the client is telling us about an |
| 334 | * open that it *already* performed locally, some time ago. We |
| 335 | * should let it succeed now if possible. |
| 336 | * |
| 337 | * In the case of a CLAIM_FH open, on the other hand, the client |
| 338 | * may be counting on us to enforce permissions (the Linux 4.1 |
| 339 | * client uses this for normal opens, for example). |
| 340 | */ |
| 341 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH) |
| 342 | accmode = NFSD_MAY_OWNER_OVERRIDE; |
| 343 | |
| 344 | status = do_open_permission(rqstp, current_fh, open, accmode); |
| 345 | |
| 346 | return status; |
| 347 | } |
| 348 | |
| 349 | static void |
| 350 | copy_clientid(clientid_t *clid, struct nfsd4_session *session) |
| 351 | { |
| 352 | struct nfsd4_sessionid *sid = |
| 353 | (struct nfsd4_sessionid *)session->se_sessionid.data; |
| 354 | |
| 355 | clid->cl_boot = sid->clientid.cl_boot; |
| 356 | clid->cl_id = sid->clientid.cl_id; |
| 357 | } |
| 358 | |
| 359 | static __be32 |
| 360 | nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 361 | struct nfsd4_open *open) |
| 362 | { |
| 363 | __be32 status; |
| 364 | struct svc_fh *resfh = NULL; |
| 365 | struct nfsd4_compoundres *resp; |
| 366 | struct net *net = SVC_NET(rqstp); |
| 367 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
| 368 | |
| 369 | dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", |
| 370 | (int)open->op_fname.len, open->op_fname.data, |
| 371 | open->op_openowner); |
| 372 | |
| 373 | /* This check required by spec. */ |
| 374 | if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) |
| 375 | return nfserr_inval; |
| 376 | |
| 377 | open->op_created = 0; |
| 378 | /* |
| 379 | * RFC5661 18.51.3 |
| 380 | * Before RECLAIM_COMPLETE done, server should deny new lock |
| 381 | */ |
| 382 | if (nfsd4_has_session(cstate) && |
| 383 | !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
| 384 | &cstate->session->se_client->cl_flags) && |
| 385 | open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) |
| 386 | return nfserr_grace; |
| 387 | |
| 388 | if (nfsd4_has_session(cstate)) |
| 389 | copy_clientid(&open->op_clientid, cstate->session); |
| 390 | |
| 391 | /* check seqid for replay. set nfs4_owner */ |
| 392 | resp = rqstp->rq_resp; |
| 393 | status = nfsd4_process_open1(&resp->cstate, open, nn); |
| 394 | if (status == nfserr_replay_me) { |
| 395 | struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; |
| 396 | fh_put(&cstate->current_fh); |
| 397 | fh_copy_shallow(&cstate->current_fh.fh_handle, |
| 398 | &rp->rp_openfh); |
| 399 | status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); |
| 400 | if (status) |
| 401 | dprintk("nfsd4_open: replay failed" |
| 402 | " restoring previous filehandle\n"); |
| 403 | else |
| 404 | status = nfserr_replay_me; |
| 405 | } |
| 406 | if (status) |
| 407 | goto out; |
| 408 | if (open->op_xdr_error) { |
| 409 | status = open->op_xdr_error; |
| 410 | goto out; |
| 411 | } |
| 412 | |
| 413 | status = nfsd4_check_open_attributes(rqstp, cstate, open); |
| 414 | if (status) |
| 415 | goto out; |
| 416 | |
| 417 | /* Openowner is now set, so sequence id will get bumped. Now we need |
| 418 | * these checks before we do any creates: */ |
| 419 | status = nfserr_grace; |
| 420 | if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) |
| 421 | goto out; |
| 422 | status = nfserr_no_grace; |
| 423 | if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
| 424 | goto out; |
| 425 | |
| 426 | switch (open->op_claim_type) { |
| 427 | case NFS4_OPEN_CLAIM_DELEGATE_CUR: |
| 428 | case NFS4_OPEN_CLAIM_NULL: |
| 429 | status = do_open_lookup(rqstp, cstate, open, &resfh); |
| 430 | if (status) |
| 431 | goto out; |
| 432 | break; |
| 433 | case NFS4_OPEN_CLAIM_PREVIOUS: |
| 434 | status = nfs4_check_open_reclaim(&open->op_clientid, |
| 435 | cstate, nn); |
| 436 | if (status) |
| 437 | goto out; |
| 438 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
| 439 | case NFS4_OPEN_CLAIM_FH: |
| 440 | case NFS4_OPEN_CLAIM_DELEG_CUR_FH: |
| 441 | status = do_open_fhandle(rqstp, cstate, open); |
| 442 | if (status) |
| 443 | goto out; |
| 444 | resfh = &cstate->current_fh; |
| 445 | break; |
| 446 | case NFS4_OPEN_CLAIM_DELEG_PREV_FH: |
| 447 | case NFS4_OPEN_CLAIM_DELEGATE_PREV: |
| 448 | dprintk("NFSD: unsupported OPEN claim type %d\n", |
| 449 | open->op_claim_type); |
| 450 | status = nfserr_notsupp; |
| 451 | goto out; |
| 452 | default: |
| 453 | dprintk("NFSD: Invalid OPEN claim type %d\n", |
| 454 | open->op_claim_type); |
| 455 | status = nfserr_inval; |
| 456 | goto out; |
| 457 | } |
| 458 | /* |
| 459 | * nfsd4_process_open2() does the actual opening of the file. If |
| 460 | * successful, it (1) truncates the file if open->op_truncate was |
| 461 | * set, (2) sets open->op_stateid, (3) sets open->op_delegation. |
| 462 | */ |
| 463 | status = nfsd4_process_open2(rqstp, resfh, open); |
| 464 | WARN(status && open->op_created, |
| 465 | "nfsd4_process_open2 failed to open newly-created file! status=%u\n", |
| 466 | be32_to_cpu(status)); |
| 467 | out: |
| 468 | if (resfh && resfh != &cstate->current_fh) { |
| 469 | fh_dup2(&cstate->current_fh, resfh); |
| 470 | fh_put(resfh); |
| 471 | kfree(resfh); |
| 472 | } |
| 473 | nfsd4_cleanup_open_state(cstate, open, status); |
| 474 | nfsd4_bump_seqid(cstate, status); |
| 475 | return status; |
| 476 | } |
| 477 | |
| 478 | /* |
| 479 | * OPEN is the only seqid-mutating operation whose decoding can fail |
| 480 | * with a seqid-mutating error (specifically, decoding of user names in |
| 481 | * the attributes). Therefore we have to do some processing to look up |
| 482 | * the stateowner so that we can bump the seqid. |
| 483 | */ |
| 484 | static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) |
| 485 | { |
| 486 | struct nfsd4_open *open = (struct nfsd4_open *)&op->u; |
| 487 | |
| 488 | if (!seqid_mutating_err(ntohl(op->status))) |
| 489 | return op->status; |
| 490 | if (nfsd4_has_session(cstate)) |
| 491 | return op->status; |
| 492 | open->op_xdr_error = op->status; |
| 493 | return nfsd4_open(rqstp, cstate, open); |
| 494 | } |
| 495 | |
| 496 | /* |
| 497 | * filehandle-manipulating ops. |
| 498 | */ |
| 499 | static __be32 |
| 500 | nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 501 | struct svc_fh **getfh) |
| 502 | { |
| 503 | if (!cstate->current_fh.fh_dentry) |
| 504 | return nfserr_nofilehandle; |
| 505 | |
| 506 | *getfh = &cstate->current_fh; |
| 507 | return nfs_ok; |
| 508 | } |
| 509 | |
| 510 | static __be32 |
| 511 | nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 512 | struct nfsd4_putfh *putfh) |
| 513 | { |
| 514 | fh_put(&cstate->current_fh); |
| 515 | cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; |
| 516 | memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, |
| 517 | putfh->pf_fhlen); |
| 518 | return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); |
| 519 | } |
| 520 | |
| 521 | static __be32 |
| 522 | nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 523 | void *arg) |
| 524 | { |
| 525 | __be32 status; |
| 526 | |
| 527 | fh_put(&cstate->current_fh); |
| 528 | status = exp_pseudoroot(rqstp, &cstate->current_fh); |
| 529 | return status; |
| 530 | } |
| 531 | |
| 532 | static __be32 |
| 533 | nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 534 | void *arg) |
| 535 | { |
| 536 | if (!cstate->save_fh.fh_dentry) |
| 537 | return nfserr_restorefh; |
| 538 | |
| 539 | fh_dup2(&cstate->current_fh, &cstate->save_fh); |
| 540 | if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) { |
| 541 | memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); |
| 542 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); |
| 543 | } |
| 544 | return nfs_ok; |
| 545 | } |
| 546 | |
| 547 | static __be32 |
| 548 | nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 549 | void *arg) |
| 550 | { |
| 551 | if (!cstate->current_fh.fh_dentry) |
| 552 | return nfserr_nofilehandle; |
| 553 | |
| 554 | fh_dup2(&cstate->save_fh, &cstate->current_fh); |
| 555 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) { |
| 556 | memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); |
| 557 | SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG); |
| 558 | } |
| 559 | return nfs_ok; |
| 560 | } |
| 561 | |
| 562 | /* |
| 563 | * misc nfsv4 ops |
| 564 | */ |
| 565 | static __be32 |
| 566 | nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 567 | struct nfsd4_access *access) |
| 568 | { |
| 569 | if (access->ac_req_access & ~NFS3_ACCESS_FULL) |
| 570 | return nfserr_inval; |
| 571 | |
| 572 | access->ac_resp_access = access->ac_req_access; |
| 573 | return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, |
| 574 | &access->ac_supported); |
| 575 | } |
| 576 | |
| 577 | static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) |
| 578 | { |
| 579 | __be32 verf[2]; |
| 580 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
| 581 | |
| 582 | /* |
| 583 | * This is opaque to client, so no need to byte-swap. Use |
| 584 | * __force to keep sparse happy |
| 585 | */ |
| 586 | verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec; |
| 587 | verf[1] = (__force __be32)nn->nfssvc_boot.tv_usec; |
| 588 | memcpy(verifier->data, verf, sizeof(verifier->data)); |
| 589 | } |
| 590 | |
| 591 | static __be32 |
| 592 | nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 593 | struct nfsd4_commit *commit) |
| 594 | { |
| 595 | gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp)); |
| 596 | return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, |
| 597 | commit->co_count); |
| 598 | } |
| 599 | |
| 600 | static __be32 |
| 601 | nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 602 | struct nfsd4_create *create) |
| 603 | { |
| 604 | struct svc_fh resfh; |
| 605 | __be32 status; |
| 606 | dev_t rdev; |
| 607 | |
| 608 | fh_init(&resfh, NFS4_FHSIZE); |
| 609 | |
| 610 | status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, |
| 611 | NFSD_MAY_CREATE); |
| 612 | if (status) |
| 613 | return status; |
| 614 | |
| 615 | status = check_attr_support(rqstp, cstate, create->cr_bmval, |
| 616 | nfsd_attrmask); |
| 617 | if (status) |
| 618 | return status; |
| 619 | |
| 620 | switch (create->cr_type) { |
| 621 | case NF4LNK: |
| 622 | status = nfsd_symlink(rqstp, &cstate->current_fh, |
| 623 | create->cr_name, create->cr_namelen, |
| 624 | create->cr_data, &resfh); |
| 625 | break; |
| 626 | |
| 627 | case NF4BLK: |
| 628 | rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); |
| 629 | if (MAJOR(rdev) != create->cr_specdata1 || |
| 630 | MINOR(rdev) != create->cr_specdata2) |
| 631 | return nfserr_inval; |
| 632 | status = nfsd_create(rqstp, &cstate->current_fh, |
| 633 | create->cr_name, create->cr_namelen, |
| 634 | &create->cr_iattr, S_IFBLK, rdev, &resfh); |
| 635 | break; |
| 636 | |
| 637 | case NF4CHR: |
| 638 | rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); |
| 639 | if (MAJOR(rdev) != create->cr_specdata1 || |
| 640 | MINOR(rdev) != create->cr_specdata2) |
| 641 | return nfserr_inval; |
| 642 | status = nfsd_create(rqstp, &cstate->current_fh, |
| 643 | create->cr_name, create->cr_namelen, |
| 644 | &create->cr_iattr,S_IFCHR, rdev, &resfh); |
| 645 | break; |
| 646 | |
| 647 | case NF4SOCK: |
| 648 | status = nfsd_create(rqstp, &cstate->current_fh, |
| 649 | create->cr_name, create->cr_namelen, |
| 650 | &create->cr_iattr, S_IFSOCK, 0, &resfh); |
| 651 | break; |
| 652 | |
| 653 | case NF4FIFO: |
| 654 | status = nfsd_create(rqstp, &cstate->current_fh, |
| 655 | create->cr_name, create->cr_namelen, |
| 656 | &create->cr_iattr, S_IFIFO, 0, &resfh); |
| 657 | break; |
| 658 | |
| 659 | case NF4DIR: |
| 660 | create->cr_iattr.ia_valid &= ~ATTR_SIZE; |
| 661 | status = nfsd_create(rqstp, &cstate->current_fh, |
| 662 | create->cr_name, create->cr_namelen, |
| 663 | &create->cr_iattr, S_IFDIR, 0, &resfh); |
| 664 | break; |
| 665 | |
| 666 | default: |
| 667 | status = nfserr_badtype; |
| 668 | } |
| 669 | |
| 670 | if (status) |
| 671 | goto out; |
| 672 | |
| 673 | if (create->cr_label.len) |
| 674 | nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval); |
| 675 | |
| 676 | if (create->cr_acl != NULL) |
| 677 | do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, |
| 678 | create->cr_bmval); |
| 679 | |
| 680 | fh_unlock(&cstate->current_fh); |
| 681 | set_change_info(&create->cr_cinfo, &cstate->current_fh); |
| 682 | fh_dup2(&cstate->current_fh, &resfh); |
| 683 | out: |
| 684 | fh_put(&resfh); |
| 685 | return status; |
| 686 | } |
| 687 | |
| 688 | static __be32 |
| 689 | nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 690 | struct nfsd4_getattr *getattr) |
| 691 | { |
| 692 | __be32 status; |
| 693 | |
| 694 | status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); |
| 695 | if (status) |
| 696 | return status; |
| 697 | |
| 698 | if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) |
| 699 | return nfserr_inval; |
| 700 | |
| 701 | getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); |
| 702 | getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); |
| 703 | getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); |
| 704 | |
| 705 | getattr->ga_fhp = &cstate->current_fh; |
| 706 | return nfs_ok; |
| 707 | } |
| 708 | |
| 709 | static __be32 |
| 710 | nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 711 | struct nfsd4_link *link) |
| 712 | { |
| 713 | __be32 status = nfserr_nofilehandle; |
| 714 | |
| 715 | if (!cstate->save_fh.fh_dentry) |
| 716 | return status; |
| 717 | status = nfsd_link(rqstp, &cstate->current_fh, |
| 718 | link->li_name, link->li_namelen, &cstate->save_fh); |
| 719 | if (!status) |
| 720 | set_change_info(&link->li_cinfo, &cstate->current_fh); |
| 721 | return status; |
| 722 | } |
| 723 | |
| 724 | static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) |
| 725 | { |
| 726 | struct svc_fh tmp_fh; |
| 727 | __be32 ret; |
| 728 | |
| 729 | fh_init(&tmp_fh, NFS4_FHSIZE); |
| 730 | ret = exp_pseudoroot(rqstp, &tmp_fh); |
| 731 | if (ret) |
| 732 | return ret; |
| 733 | if (tmp_fh.fh_dentry == fh->fh_dentry) { |
| 734 | fh_put(&tmp_fh); |
| 735 | return nfserr_noent; |
| 736 | } |
| 737 | fh_put(&tmp_fh); |
| 738 | return nfsd_lookup(rqstp, fh, "..", 2, fh); |
| 739 | } |
| 740 | |
| 741 | static __be32 |
| 742 | nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 743 | void *arg) |
| 744 | { |
| 745 | return nfsd4_do_lookupp(rqstp, &cstate->current_fh); |
| 746 | } |
| 747 | |
| 748 | static __be32 |
| 749 | nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 750 | struct nfsd4_lookup *lookup) |
| 751 | { |
| 752 | return nfsd_lookup(rqstp, &cstate->current_fh, |
| 753 | lookup->lo_name, lookup->lo_len, |
| 754 | &cstate->current_fh); |
| 755 | } |
| 756 | |
| 757 | static __be32 |
| 758 | nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 759 | struct nfsd4_read *read) |
| 760 | { |
| 761 | __be32 status; |
| 762 | |
| 763 | /* no need to check permission - this will be done in nfsd_read() */ |
| 764 | |
| 765 | read->rd_filp = NULL; |
| 766 | if (read->rd_offset >= OFFSET_MAX) |
| 767 | return nfserr_inval; |
| 768 | |
| 769 | /* |
| 770 | * If we do a zero copy read, then a client will see read data |
| 771 | * that reflects the state of the file *after* performing the |
| 772 | * following compound. |
| 773 | * |
| 774 | * To ensure proper ordering, we therefore turn off zero copy if |
| 775 | * the client wants us to do more in this compound: |
| 776 | */ |
| 777 | if (!nfsd4_last_compound_op(rqstp)) |
| 778 | clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags); |
| 779 | |
| 780 | /* check stateid */ |
| 781 | if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), |
| 782 | cstate, &read->rd_stateid, |
| 783 | RD_STATE, &read->rd_filp))) { |
| 784 | dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); |
| 785 | goto out; |
| 786 | } |
| 787 | status = nfs_ok; |
| 788 | out: |
| 789 | read->rd_rqstp = rqstp; |
| 790 | read->rd_fhp = &cstate->current_fh; |
| 791 | return status; |
| 792 | } |
| 793 | |
| 794 | static __be32 |
| 795 | nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 796 | struct nfsd4_readdir *readdir) |
| 797 | { |
| 798 | u64 cookie = readdir->rd_cookie; |
| 799 | static const nfs4_verifier zeroverf; |
| 800 | |
| 801 | /* no need to check permission - this will be done in nfsd_readdir() */ |
| 802 | |
| 803 | if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) |
| 804 | return nfserr_inval; |
| 805 | |
| 806 | readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); |
| 807 | readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); |
| 808 | readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); |
| 809 | |
| 810 | if ((cookie == 1) || (cookie == 2) || |
| 811 | (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) |
| 812 | return nfserr_bad_cookie; |
| 813 | |
| 814 | readdir->rd_rqstp = rqstp; |
| 815 | readdir->rd_fhp = &cstate->current_fh; |
| 816 | return nfs_ok; |
| 817 | } |
| 818 | |
| 819 | static __be32 |
| 820 | nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 821 | struct nfsd4_readlink *readlink) |
| 822 | { |
| 823 | readlink->rl_rqstp = rqstp; |
| 824 | readlink->rl_fhp = &cstate->current_fh; |
| 825 | return nfs_ok; |
| 826 | } |
| 827 | |
| 828 | static __be32 |
| 829 | nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 830 | struct nfsd4_remove *remove) |
| 831 | { |
| 832 | __be32 status; |
| 833 | |
| 834 | if (locks_in_grace(SVC_NET(rqstp))) |
| 835 | return nfserr_grace; |
| 836 | status = nfsd_unlink(rqstp, &cstate->current_fh, 0, |
| 837 | remove->rm_name, remove->rm_namelen); |
| 838 | if (!status) { |
| 839 | fh_unlock(&cstate->current_fh); |
| 840 | set_change_info(&remove->rm_cinfo, &cstate->current_fh); |
| 841 | } |
| 842 | return status; |
| 843 | } |
| 844 | |
| 845 | static __be32 |
| 846 | nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 847 | struct nfsd4_rename *rename) |
| 848 | { |
| 849 | __be32 status = nfserr_nofilehandle; |
| 850 | |
| 851 | if (!cstate->save_fh.fh_dentry) |
| 852 | return status; |
| 853 | if (locks_in_grace(SVC_NET(rqstp)) && |
| 854 | !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK)) |
| 855 | return nfserr_grace; |
| 856 | status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, |
| 857 | rename->rn_snamelen, &cstate->current_fh, |
| 858 | rename->rn_tname, rename->rn_tnamelen); |
| 859 | if (status) |
| 860 | return status; |
| 861 | set_change_info(&rename->rn_sinfo, &cstate->current_fh); |
| 862 | set_change_info(&rename->rn_tinfo, &cstate->save_fh); |
| 863 | return nfs_ok; |
| 864 | } |
| 865 | |
| 866 | static __be32 |
| 867 | nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 868 | struct nfsd4_secinfo *secinfo) |
| 869 | { |
| 870 | struct svc_fh resfh; |
| 871 | struct svc_export *exp; |
| 872 | struct dentry *dentry; |
| 873 | __be32 err; |
| 874 | |
| 875 | fh_init(&resfh, NFS4_FHSIZE); |
| 876 | err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); |
| 877 | if (err) |
| 878 | return err; |
| 879 | err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, |
| 880 | secinfo->si_name, secinfo->si_namelen, |
| 881 | &exp, &dentry); |
| 882 | if (err) |
| 883 | return err; |
| 884 | if (dentry->d_inode == NULL) { |
| 885 | exp_put(exp); |
| 886 | err = nfserr_noent; |
| 887 | } else |
| 888 | secinfo->si_exp = exp; |
| 889 | dput(dentry); |
| 890 | if (cstate->minorversion) |
| 891 | /* See rfc 5661 section 2.6.3.1.1.8 */ |
| 892 | fh_put(&cstate->current_fh); |
| 893 | return err; |
| 894 | } |
| 895 | |
| 896 | static __be32 |
| 897 | nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 898 | struct nfsd4_secinfo_no_name *sin) |
| 899 | { |
| 900 | __be32 err; |
| 901 | |
| 902 | switch (sin->sin_style) { |
| 903 | case NFS4_SECINFO_STYLE4_CURRENT_FH: |
| 904 | break; |
| 905 | case NFS4_SECINFO_STYLE4_PARENT: |
| 906 | err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); |
| 907 | if (err) |
| 908 | return err; |
| 909 | break; |
| 910 | default: |
| 911 | return nfserr_inval; |
| 912 | } |
| 913 | |
| 914 | sin->sin_exp = exp_get(cstate->current_fh.fh_export); |
| 915 | fh_put(&cstate->current_fh); |
| 916 | return nfs_ok; |
| 917 | } |
| 918 | |
| 919 | static __be32 |
| 920 | nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 921 | struct nfsd4_setattr *setattr) |
| 922 | { |
| 923 | __be32 status = nfs_ok; |
| 924 | int err; |
| 925 | |
| 926 | if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { |
| 927 | status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate, |
| 928 | &setattr->sa_stateid, WR_STATE, NULL); |
| 929 | if (status) { |
| 930 | dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); |
| 931 | return status; |
| 932 | } |
| 933 | } |
| 934 | err = fh_want_write(&cstate->current_fh); |
| 935 | if (err) |
| 936 | return nfserrno(err); |
| 937 | status = nfs_ok; |
| 938 | |
| 939 | status = check_attr_support(rqstp, cstate, setattr->sa_bmval, |
| 940 | nfsd_attrmask); |
| 941 | if (status) |
| 942 | goto out; |
| 943 | |
| 944 | if (setattr->sa_acl != NULL) |
| 945 | status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, |
| 946 | setattr->sa_acl); |
| 947 | if (status) |
| 948 | goto out; |
| 949 | if (setattr->sa_label.len) |
| 950 | status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, |
| 951 | &setattr->sa_label); |
| 952 | if (status) |
| 953 | goto out; |
| 954 | status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, |
| 955 | 0, (time_t)0); |
| 956 | out: |
| 957 | fh_drop_write(&cstate->current_fh); |
| 958 | return status; |
| 959 | } |
| 960 | |
| 961 | static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write) |
| 962 | { |
| 963 | int i = 1; |
| 964 | int buflen = write->wr_buflen; |
| 965 | |
| 966 | vec[0].iov_base = write->wr_head.iov_base; |
| 967 | vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len); |
| 968 | buflen -= vec[0].iov_len; |
| 969 | |
| 970 | while (buflen) { |
| 971 | vec[i].iov_base = page_address(write->wr_pagelist[i - 1]); |
| 972 | vec[i].iov_len = min_t(int, PAGE_SIZE, buflen); |
| 973 | buflen -= vec[i].iov_len; |
| 974 | i++; |
| 975 | } |
| 976 | return i; |
| 977 | } |
| 978 | |
| 979 | static __be32 |
| 980 | nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 981 | struct nfsd4_write *write) |
| 982 | { |
| 983 | stateid_t *stateid = &write->wr_stateid; |
| 984 | struct file *filp = NULL; |
| 985 | __be32 status = nfs_ok; |
| 986 | unsigned long cnt; |
| 987 | int nvecs; |
| 988 | |
| 989 | /* no need to check permission - this will be done in nfsd_write() */ |
| 990 | |
| 991 | if (write->wr_offset >= OFFSET_MAX) |
| 992 | return nfserr_inval; |
| 993 | |
| 994 | status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), |
| 995 | cstate, stateid, WR_STATE, &filp); |
| 996 | if (status) { |
| 997 | dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); |
| 998 | return status; |
| 999 | } |
| 1000 | |
| 1001 | cnt = write->wr_buflen; |
| 1002 | write->wr_how_written = write->wr_stable_how; |
| 1003 | gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp)); |
| 1004 | |
| 1005 | nvecs = fill_in_write_vector(rqstp->rq_vec, write); |
| 1006 | WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); |
| 1007 | |
| 1008 | status = nfsd_write(rqstp, &cstate->current_fh, filp, |
| 1009 | write->wr_offset, rqstp->rq_vec, nvecs, |
| 1010 | &cnt, &write->wr_how_written); |
| 1011 | if (filp) |
| 1012 | fput(filp); |
| 1013 | |
| 1014 | write->wr_bytes_written = cnt; |
| 1015 | |
| 1016 | return status; |
| 1017 | } |
| 1018 | |
| 1019 | static __be32 |
| 1020 | nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 1021 | struct nfsd4_fallocate *fallocate, int flags) |
| 1022 | { |
| 1023 | __be32 status = nfserr_notsupp; |
| 1024 | struct file *file; |
| 1025 | |
| 1026 | status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate, |
| 1027 | &fallocate->falloc_stateid, |
| 1028 | WR_STATE, &file); |
| 1029 | if (status != nfs_ok) { |
| 1030 | dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n"); |
| 1031 | return status; |
| 1032 | } |
| 1033 | |
| 1034 | status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file, |
| 1035 | fallocate->falloc_offset, |
| 1036 | fallocate->falloc_length, |
| 1037 | flags); |
| 1038 | fput(file); |
| 1039 | return status; |
| 1040 | } |
| 1041 | |
| 1042 | static __be32 |
| 1043 | nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 1044 | struct nfsd4_fallocate *fallocate) |
| 1045 | { |
| 1046 | return nfsd4_fallocate(rqstp, cstate, fallocate, 0); |
| 1047 | } |
| 1048 | |
| 1049 | static __be32 |
| 1050 | nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 1051 | struct nfsd4_fallocate *fallocate) |
| 1052 | { |
| 1053 | return nfsd4_fallocate(rqstp, cstate, fallocate, |
| 1054 | FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE); |
| 1055 | } |
| 1056 | |
| 1057 | static __be32 |
| 1058 | nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 1059 | struct nfsd4_seek *seek) |
| 1060 | { |
| 1061 | int whence; |
| 1062 | __be32 status; |
| 1063 | struct file *file; |
| 1064 | |
| 1065 | status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate, |
| 1066 | &seek->seek_stateid, |
| 1067 | RD_STATE, &file); |
| 1068 | if (status) { |
| 1069 | dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n"); |
| 1070 | return status; |
| 1071 | } |
| 1072 | |
| 1073 | switch (seek->seek_whence) { |
| 1074 | case NFS4_CONTENT_DATA: |
| 1075 | whence = SEEK_DATA; |
| 1076 | break; |
| 1077 | case NFS4_CONTENT_HOLE: |
| 1078 | whence = SEEK_HOLE; |
| 1079 | break; |
| 1080 | default: |
| 1081 | status = nfserr_union_notsupp; |
| 1082 | goto out; |
| 1083 | } |
| 1084 | |
| 1085 | /* |
| 1086 | * Note: This call does change file->f_pos, but nothing in NFSD |
| 1087 | * should ever file->f_pos. |
| 1088 | */ |
| 1089 | seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence); |
| 1090 | if (seek->seek_pos < 0) |
| 1091 | status = nfserrno(seek->seek_pos); |
| 1092 | else if (seek->seek_pos >= i_size_read(file_inode(file))) |
| 1093 | seek->seek_eof = true; |
| 1094 | |
| 1095 | out: |
| 1096 | fput(file); |
| 1097 | return status; |
| 1098 | } |
| 1099 | |
| 1100 | /* This routine never returns NFS_OK! If there are no other errors, it |
| 1101 | * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the |
| 1102 | * attributes matched. VERIFY is implemented by mapping NFSERR_SAME |
| 1103 | * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. |
| 1104 | */ |
| 1105 | static __be32 |
| 1106 | _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 1107 | struct nfsd4_verify *verify) |
| 1108 | { |
| 1109 | __be32 *buf, *p; |
| 1110 | int count; |
| 1111 | __be32 status; |
| 1112 | |
| 1113 | status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); |
| 1114 | if (status) |
| 1115 | return status; |
| 1116 | |
| 1117 | status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); |
| 1118 | if (status) |
| 1119 | return status; |
| 1120 | |
| 1121 | if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) |
| 1122 | || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) |
| 1123 | return nfserr_inval; |
| 1124 | if (verify->ve_attrlen & 3) |
| 1125 | return nfserr_inval; |
| 1126 | |
| 1127 | /* count in words: |
| 1128 | * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 |
| 1129 | */ |
| 1130 | count = 4 + (verify->ve_attrlen >> 2); |
| 1131 | buf = kmalloc(count << 2, GFP_KERNEL); |
| 1132 | if (!buf) |
| 1133 | return nfserr_jukebox; |
| 1134 | |
| 1135 | p = buf; |
| 1136 | status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, |
| 1137 | cstate->current_fh.fh_export, |
| 1138 | cstate->current_fh.fh_dentry, |
| 1139 | verify->ve_bmval, |
| 1140 | rqstp, 0); |
| 1141 | /* |
| 1142 | * If nfsd4_encode_fattr() ran out of space, assume that's because |
| 1143 | * the attributes are longer (hence different) than those given: |
| 1144 | */ |
| 1145 | if (status == nfserr_resource) |
| 1146 | status = nfserr_not_same; |
| 1147 | if (status) |
| 1148 | goto out_kfree; |
| 1149 | |
| 1150 | /* skip bitmap */ |
| 1151 | p = buf + 1 + ntohl(buf[0]); |
| 1152 | status = nfserr_not_same; |
| 1153 | if (ntohl(*p++) != verify->ve_attrlen) |
| 1154 | goto out_kfree; |
| 1155 | if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) |
| 1156 | status = nfserr_same; |
| 1157 | |
| 1158 | out_kfree: |
| 1159 | kfree(buf); |
| 1160 | return status; |
| 1161 | } |
| 1162 | |
| 1163 | static __be32 |
| 1164 | nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 1165 | struct nfsd4_verify *verify) |
| 1166 | { |
| 1167 | __be32 status; |
| 1168 | |
| 1169 | status = _nfsd4_verify(rqstp, cstate, verify); |
| 1170 | return status == nfserr_not_same ? nfs_ok : status; |
| 1171 | } |
| 1172 | |
| 1173 | static __be32 |
| 1174 | nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 1175 | struct nfsd4_verify *verify) |
| 1176 | { |
| 1177 | __be32 status; |
| 1178 | |
| 1179 | status = _nfsd4_verify(rqstp, cstate, verify); |
| 1180 | return status == nfserr_same ? nfs_ok : status; |
| 1181 | } |
| 1182 | |
| 1183 | #ifdef CONFIG_NFSD_PNFS |
| 1184 | static const struct nfsd4_layout_ops * |
| 1185 | nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type) |
| 1186 | { |
| 1187 | if (!exp->ex_layout_type) { |
| 1188 | dprintk("%s: export does not support pNFS\n", __func__); |
| 1189 | return NULL; |
| 1190 | } |
| 1191 | |
| 1192 | if (exp->ex_layout_type != layout_type) { |
| 1193 | dprintk("%s: layout type %d not supported\n", |
| 1194 | __func__, layout_type); |
| 1195 | return NULL; |
| 1196 | } |
| 1197 | |
| 1198 | return nfsd4_layout_ops[layout_type]; |
| 1199 | } |
| 1200 | |
| 1201 | static __be32 |
| 1202 | nfsd4_getdeviceinfo(struct svc_rqst *rqstp, |
| 1203 | struct nfsd4_compound_state *cstate, |
| 1204 | struct nfsd4_getdeviceinfo *gdp) |
| 1205 | { |
| 1206 | const struct nfsd4_layout_ops *ops; |
| 1207 | struct nfsd4_deviceid_map *map; |
| 1208 | struct svc_export *exp; |
| 1209 | __be32 nfserr; |
| 1210 | |
| 1211 | dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n", |
| 1212 | __func__, |
| 1213 | gdp->gd_layout_type, |
| 1214 | gdp->gd_devid.fsid_idx, gdp->gd_devid.generation, |
| 1215 | gdp->gd_maxcount); |
| 1216 | |
| 1217 | map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx); |
| 1218 | if (!map) { |
| 1219 | dprintk("%s: couldn't find device ID to export mapping!\n", |
| 1220 | __func__); |
| 1221 | return nfserr_noent; |
| 1222 | } |
| 1223 | |
| 1224 | exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid); |
| 1225 | if (IS_ERR(exp)) { |
| 1226 | dprintk("%s: could not find device id\n", __func__); |
| 1227 | return nfserr_noent; |
| 1228 | } |
| 1229 | |
| 1230 | nfserr = nfserr_layoutunavailable; |
| 1231 | ops = nfsd4_layout_verify(exp, gdp->gd_layout_type); |
| 1232 | if (!ops) |
| 1233 | goto out; |
| 1234 | |
| 1235 | nfserr = nfs_ok; |
| 1236 | if (gdp->gd_maxcount != 0) |
| 1237 | nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, gdp); |
| 1238 | |
| 1239 | gdp->gd_notify_types &= ops->notify_types; |
| 1240 | exp_put(exp); |
| 1241 | out: |
| 1242 | return nfserr; |
| 1243 | } |
| 1244 | |
| 1245 | static __be32 |
| 1246 | nfsd4_layoutget(struct svc_rqst *rqstp, |
| 1247 | struct nfsd4_compound_state *cstate, |
| 1248 | struct nfsd4_layoutget *lgp) |
| 1249 | { |
| 1250 | struct svc_fh *current_fh = &cstate->current_fh; |
| 1251 | const struct nfsd4_layout_ops *ops; |
| 1252 | struct nfs4_layout_stateid *ls; |
| 1253 | __be32 nfserr; |
| 1254 | int accmode; |
| 1255 | |
| 1256 | switch (lgp->lg_seg.iomode) { |
| 1257 | case IOMODE_READ: |
| 1258 | accmode = NFSD_MAY_READ; |
| 1259 | break; |
| 1260 | case IOMODE_RW: |
| 1261 | accmode = NFSD_MAY_READ | NFSD_MAY_WRITE; |
| 1262 | break; |
| 1263 | default: |
| 1264 | dprintk("%s: invalid iomode %d\n", |
| 1265 | __func__, lgp->lg_seg.iomode); |
| 1266 | nfserr = nfserr_badiomode; |
| 1267 | goto out; |
| 1268 | } |
| 1269 | |
| 1270 | nfserr = fh_verify(rqstp, current_fh, 0, accmode); |
| 1271 | if (nfserr) |
| 1272 | goto out; |
| 1273 | |
| 1274 | nfserr = nfserr_layoutunavailable; |
| 1275 | ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type); |
| 1276 | if (!ops) |
| 1277 | goto out; |
| 1278 | |
| 1279 | /* |
| 1280 | * Verify minlength and range as per RFC5661: |
| 1281 | * o If loga_length is less than loga_minlength, |
| 1282 | * the metadata server MUST return NFS4ERR_INVAL. |
| 1283 | * o If the sum of loga_offset and loga_minlength exceeds |
| 1284 | * NFS4_UINT64_MAX, and loga_minlength is not |
| 1285 | * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result. |
| 1286 | * o If the sum of loga_offset and loga_length exceeds |
| 1287 | * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX, |
| 1288 | * the error NFS4ERR_INVAL MUST result. |
| 1289 | */ |
| 1290 | nfserr = nfserr_inval; |
| 1291 | if (lgp->lg_seg.length < lgp->lg_minlength || |
| 1292 | (lgp->lg_minlength != NFS4_MAX_UINT64 && |
| 1293 | lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) || |
| 1294 | (lgp->lg_seg.length != NFS4_MAX_UINT64 && |
| 1295 | lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset)) |
| 1296 | goto out; |
| 1297 | if (lgp->lg_seg.length == 0) |
| 1298 | goto out; |
| 1299 | |
| 1300 | nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid, |
| 1301 | true, lgp->lg_layout_type, &ls); |
| 1302 | if (nfserr) { |
| 1303 | trace_layout_get_lookup_fail(&lgp->lg_sid); |
| 1304 | goto out; |
| 1305 | } |
| 1306 | |
| 1307 | nfserr = nfserr_recallconflict; |
| 1308 | if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls)) |
| 1309 | goto out_put_stid; |
| 1310 | |
| 1311 | nfserr = ops->proc_layoutget(current_fh->fh_dentry->d_inode, |
| 1312 | current_fh, lgp); |
| 1313 | if (nfserr) |
| 1314 | goto out_put_stid; |
| 1315 | |
| 1316 | nfserr = nfsd4_insert_layout(lgp, ls); |
| 1317 | |
| 1318 | out_put_stid: |
| 1319 | nfs4_put_stid(&ls->ls_stid); |
| 1320 | out: |
| 1321 | return nfserr; |
| 1322 | } |
| 1323 | |
| 1324 | static __be32 |
| 1325 | nfsd4_layoutcommit(struct svc_rqst *rqstp, |
| 1326 | struct nfsd4_compound_state *cstate, |
| 1327 | struct nfsd4_layoutcommit *lcp) |
| 1328 | { |
| 1329 | const struct nfsd4_layout_seg *seg = &lcp->lc_seg; |
| 1330 | struct svc_fh *current_fh = &cstate->current_fh; |
| 1331 | const struct nfsd4_layout_ops *ops; |
| 1332 | loff_t new_size = lcp->lc_last_wr + 1; |
| 1333 | struct inode *inode; |
| 1334 | struct nfs4_layout_stateid *ls; |
| 1335 | __be32 nfserr; |
| 1336 | |
| 1337 | nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE); |
| 1338 | if (nfserr) |
| 1339 | goto out; |
| 1340 | |
| 1341 | nfserr = nfserr_layoutunavailable; |
| 1342 | ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type); |
| 1343 | if (!ops) |
| 1344 | goto out; |
| 1345 | inode = current_fh->fh_dentry->d_inode; |
| 1346 | |
| 1347 | nfserr = nfserr_inval; |
| 1348 | if (new_size <= seg->offset) { |
| 1349 | dprintk("pnfsd: last write before layout segment\n"); |
| 1350 | goto out; |
| 1351 | } |
| 1352 | if (new_size > seg->offset + seg->length) { |
| 1353 | dprintk("pnfsd: last write beyond layout segment\n"); |
| 1354 | goto out; |
| 1355 | } |
| 1356 | if (!lcp->lc_newoffset && new_size > i_size_read(inode)) { |
| 1357 | dprintk("pnfsd: layoutcommit beyond EOF\n"); |
| 1358 | goto out; |
| 1359 | } |
| 1360 | |
| 1361 | nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid, |
| 1362 | false, lcp->lc_layout_type, |
| 1363 | &ls); |
| 1364 | if (nfserr) { |
| 1365 | trace_layout_commit_lookup_fail(&lcp->lc_sid); |
| 1366 | /* fixup error code as per RFC5661 */ |
| 1367 | if (nfserr == nfserr_bad_stateid) |
| 1368 | nfserr = nfserr_badlayout; |
| 1369 | goto out; |
| 1370 | } |
| 1371 | |
| 1372 | nfserr = ops->proc_layoutcommit(inode, lcp); |
| 1373 | if (nfserr) |
| 1374 | goto out_put_stid; |
| 1375 | |
| 1376 | if (new_size > i_size_read(inode)) { |
| 1377 | lcp->lc_size_chg = 1; |
| 1378 | lcp->lc_newsize = new_size; |
| 1379 | } else { |
| 1380 | lcp->lc_size_chg = 0; |
| 1381 | } |
| 1382 | |
| 1383 | out_put_stid: |
| 1384 | nfs4_put_stid(&ls->ls_stid); |
| 1385 | out: |
| 1386 | return nfserr; |
| 1387 | } |
| 1388 | |
| 1389 | static __be32 |
| 1390 | nfsd4_layoutreturn(struct svc_rqst *rqstp, |
| 1391 | struct nfsd4_compound_state *cstate, |
| 1392 | struct nfsd4_layoutreturn *lrp) |
| 1393 | { |
| 1394 | struct svc_fh *current_fh = &cstate->current_fh; |
| 1395 | __be32 nfserr; |
| 1396 | |
| 1397 | nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP); |
| 1398 | if (nfserr) |
| 1399 | goto out; |
| 1400 | |
| 1401 | nfserr = nfserr_layoutunavailable; |
| 1402 | if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type)) |
| 1403 | goto out; |
| 1404 | |
| 1405 | switch (lrp->lr_seg.iomode) { |
| 1406 | case IOMODE_READ: |
| 1407 | case IOMODE_RW: |
| 1408 | case IOMODE_ANY: |
| 1409 | break; |
| 1410 | default: |
| 1411 | dprintk("%s: invalid iomode %d\n", __func__, |
| 1412 | lrp->lr_seg.iomode); |
| 1413 | nfserr = nfserr_inval; |
| 1414 | goto out; |
| 1415 | } |
| 1416 | |
| 1417 | switch (lrp->lr_return_type) { |
| 1418 | case RETURN_FILE: |
| 1419 | nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp); |
| 1420 | break; |
| 1421 | case RETURN_FSID: |
| 1422 | case RETURN_ALL: |
| 1423 | nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp); |
| 1424 | break; |
| 1425 | default: |
| 1426 | dprintk("%s: invalid return_type %d\n", __func__, |
| 1427 | lrp->lr_return_type); |
| 1428 | nfserr = nfserr_inval; |
| 1429 | break; |
| 1430 | } |
| 1431 | out: |
| 1432 | return nfserr; |
| 1433 | } |
| 1434 | #endif /* CONFIG_NFSD_PNFS */ |
| 1435 | |
| 1436 | /* |
| 1437 | * NULL call. |
| 1438 | */ |
| 1439 | static __be32 |
| 1440 | nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) |
| 1441 | { |
| 1442 | return nfs_ok; |
| 1443 | } |
| 1444 | |
| 1445 | static inline void nfsd4_increment_op_stats(u32 opnum) |
| 1446 | { |
| 1447 | if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) |
| 1448 | nfsdstats.nfs4_opcount[opnum]++; |
| 1449 | } |
| 1450 | |
| 1451 | typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, |
| 1452 | void *); |
| 1453 | typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op); |
| 1454 | typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *); |
| 1455 | typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *); |
| 1456 | |
| 1457 | enum nfsd4_op_flags { |
| 1458 | ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ |
| 1459 | ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */ |
| 1460 | ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */ |
| 1461 | /* For rfc 5661 section 2.6.3.1.1: */ |
| 1462 | OP_HANDLES_WRONGSEC = 1 << 3, |
| 1463 | OP_IS_PUTFH_LIKE = 1 << 4, |
| 1464 | /* |
| 1465 | * These are the ops whose result size we estimate before |
| 1466 | * encoding, to avoid performing an op then not being able to |
| 1467 | * respond or cache a response. This includes writes and setattrs |
| 1468 | * as well as the operations usually called "nonidempotent": |
| 1469 | */ |
| 1470 | OP_MODIFIES_SOMETHING = 1 << 5, |
| 1471 | /* |
| 1472 | * Cache compounds containing these ops in the xid-based drc: |
| 1473 | * We use the DRC for compounds containing non-idempotent |
| 1474 | * operations, *except* those that are 4.1-specific (since |
| 1475 | * sessions provide their own EOS), and except for stateful |
| 1476 | * operations other than setclientid and setclientid_confirm |
| 1477 | * (since sequence numbers provide EOS for open, lock, etc in |
| 1478 | * the v4.0 case). |
| 1479 | */ |
| 1480 | OP_CACHEME = 1 << 6, |
| 1481 | /* |
| 1482 | * These are ops which clear current state id. |
| 1483 | */ |
| 1484 | OP_CLEAR_STATEID = 1 << 7, |
| 1485 | }; |
| 1486 | |
| 1487 | struct nfsd4_operation { |
| 1488 | nfsd4op_func op_func; |
| 1489 | u32 op_flags; |
| 1490 | char *op_name; |
| 1491 | /* Try to get response size before operation */ |
| 1492 | nfsd4op_rsize op_rsize_bop; |
| 1493 | stateid_getter op_get_currentstateid; |
| 1494 | stateid_setter op_set_currentstateid; |
| 1495 | }; |
| 1496 | |
| 1497 | static struct nfsd4_operation nfsd4_ops[]; |
| 1498 | |
| 1499 | static const char *nfsd4_op_name(unsigned opnum); |
| 1500 | |
| 1501 | /* |
| 1502 | * Enforce NFSv4.1 COMPOUND ordering rules: |
| 1503 | * |
| 1504 | * Also note, enforced elsewhere: |
| 1505 | * - SEQUENCE other than as first op results in |
| 1506 | * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) |
| 1507 | * - BIND_CONN_TO_SESSION must be the only op in its compound. |
| 1508 | * (Enforced in nfsd4_bind_conn_to_session().) |
| 1509 | * - DESTROY_SESSION must be the final operation in a compound, if |
| 1510 | * sessionid's in SEQUENCE and DESTROY_SESSION are the same. |
| 1511 | * (Enforced in nfsd4_destroy_session().) |
| 1512 | */ |
| 1513 | static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) |
| 1514 | { |
| 1515 | struct nfsd4_op *op = &args->ops[0]; |
| 1516 | |
| 1517 | /* These ordering requirements don't apply to NFSv4.0: */ |
| 1518 | if (args->minorversion == 0) |
| 1519 | return nfs_ok; |
| 1520 | /* This is weird, but OK, not our problem: */ |
| 1521 | if (args->opcnt == 0) |
| 1522 | return nfs_ok; |
| 1523 | if (op->status == nfserr_op_illegal) |
| 1524 | return nfs_ok; |
| 1525 | if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) |
| 1526 | return nfserr_op_not_in_session; |
| 1527 | if (op->opnum == OP_SEQUENCE) |
| 1528 | return nfs_ok; |
| 1529 | if (args->opcnt != 1) |
| 1530 | return nfserr_not_only_op; |
| 1531 | return nfs_ok; |
| 1532 | } |
| 1533 | |
| 1534 | static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op) |
| 1535 | { |
| 1536 | return &nfsd4_ops[op->opnum]; |
| 1537 | } |
| 1538 | |
| 1539 | bool nfsd4_cache_this_op(struct nfsd4_op *op) |
| 1540 | { |
| 1541 | if (op->opnum == OP_ILLEGAL) |
| 1542 | return false; |
| 1543 | return OPDESC(op)->op_flags & OP_CACHEME; |
| 1544 | } |
| 1545 | |
| 1546 | static bool need_wrongsec_check(struct svc_rqst *rqstp) |
| 1547 | { |
| 1548 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
| 1549 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; |
| 1550 | struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; |
| 1551 | struct nfsd4_op *next = &argp->ops[resp->opcnt]; |
| 1552 | struct nfsd4_operation *thisd; |
| 1553 | struct nfsd4_operation *nextd; |
| 1554 | |
| 1555 | thisd = OPDESC(this); |
| 1556 | /* |
| 1557 | * Most ops check wronsec on our own; only the putfh-like ops |
| 1558 | * have special rules. |
| 1559 | */ |
| 1560 | if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) |
| 1561 | return false; |
| 1562 | /* |
| 1563 | * rfc 5661 2.6.3.1.1.6: don't bother erroring out a |
| 1564 | * put-filehandle operation if we're not going to use the |
| 1565 | * result: |
| 1566 | */ |
| 1567 | if (argp->opcnt == resp->opcnt) |
| 1568 | return false; |
| 1569 | if (next->opnum == OP_ILLEGAL) |
| 1570 | return false; |
| 1571 | nextd = OPDESC(next); |
| 1572 | /* |
| 1573 | * Rest of 2.6.3.1.1: certain operations will return WRONGSEC |
| 1574 | * errors themselves as necessary; others should check for them |
| 1575 | * now: |
| 1576 | */ |
| 1577 | return !(nextd->op_flags & OP_HANDLES_WRONGSEC); |
| 1578 | } |
| 1579 | |
| 1580 | static void svcxdr_init_encode(struct svc_rqst *rqstp, |
| 1581 | struct nfsd4_compoundres *resp) |
| 1582 | { |
| 1583 | struct xdr_stream *xdr = &resp->xdr; |
| 1584 | struct xdr_buf *buf = &rqstp->rq_res; |
| 1585 | struct kvec *head = buf->head; |
| 1586 | |
| 1587 | xdr->buf = buf; |
| 1588 | xdr->iov = head; |
| 1589 | xdr->p = head->iov_base + head->iov_len; |
| 1590 | xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack; |
| 1591 | /* Tail and page_len should be zero at this point: */ |
| 1592 | buf->len = buf->head[0].iov_len; |
| 1593 | xdr->scratch.iov_len = 0; |
| 1594 | xdr->page_ptr = buf->pages - 1; |
| 1595 | buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages) |
| 1596 | - rqstp->rq_auth_slack; |
| 1597 | } |
| 1598 | |
| 1599 | /* |
| 1600 | * COMPOUND call. |
| 1601 | */ |
| 1602 | static __be32 |
| 1603 | nfsd4_proc_compound(struct svc_rqst *rqstp, |
| 1604 | struct nfsd4_compoundargs *args, |
| 1605 | struct nfsd4_compoundres *resp) |
| 1606 | { |
| 1607 | struct nfsd4_op *op; |
| 1608 | struct nfsd4_operation *opdesc; |
| 1609 | struct nfsd4_compound_state *cstate = &resp->cstate; |
| 1610 | struct svc_fh *current_fh = &cstate->current_fh; |
| 1611 | struct svc_fh *save_fh = &cstate->save_fh; |
| 1612 | __be32 status; |
| 1613 | |
| 1614 | svcxdr_init_encode(rqstp, resp); |
| 1615 | resp->tagp = resp->xdr.p; |
| 1616 | /* reserve space for: taglen, tag, and opcnt */ |
| 1617 | xdr_reserve_space(&resp->xdr, 8 + args->taglen); |
| 1618 | resp->taglen = args->taglen; |
| 1619 | resp->tag = args->tag; |
| 1620 | resp->rqstp = rqstp; |
| 1621 | cstate->minorversion = args->minorversion; |
| 1622 | fh_init(current_fh, NFS4_FHSIZE); |
| 1623 | fh_init(save_fh, NFS4_FHSIZE); |
| 1624 | /* |
| 1625 | * Don't use the deferral mechanism for NFSv4; compounds make it |
| 1626 | * too hard to avoid non-idempotency problems. |
| 1627 | */ |
| 1628 | clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); |
| 1629 | |
| 1630 | /* |
| 1631 | * According to RFC3010, this takes precedence over all other errors. |
| 1632 | */ |
| 1633 | status = nfserr_minor_vers_mismatch; |
| 1634 | if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0) |
| 1635 | goto out; |
| 1636 | |
| 1637 | status = nfs41_check_op_ordering(args); |
| 1638 | if (status) { |
| 1639 | op = &args->ops[0]; |
| 1640 | op->status = status; |
| 1641 | goto encode_op; |
| 1642 | } |
| 1643 | |
| 1644 | while (!status && resp->opcnt < args->opcnt) { |
| 1645 | op = &args->ops[resp->opcnt++]; |
| 1646 | |
| 1647 | dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", |
| 1648 | resp->opcnt, args->opcnt, op->opnum, |
| 1649 | nfsd4_op_name(op->opnum)); |
| 1650 | /* |
| 1651 | * The XDR decode routines may have pre-set op->status; |
| 1652 | * for example, if there is a miscellaneous XDR error |
| 1653 | * it will be set to nfserr_bad_xdr. |
| 1654 | */ |
| 1655 | if (op->status) { |
| 1656 | if (op->opnum == OP_OPEN) |
| 1657 | op->status = nfsd4_open_omfg(rqstp, cstate, op); |
| 1658 | goto encode_op; |
| 1659 | } |
| 1660 | |
| 1661 | opdesc = OPDESC(op); |
| 1662 | |
| 1663 | if (!current_fh->fh_dentry) { |
| 1664 | if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { |
| 1665 | op->status = nfserr_nofilehandle; |
| 1666 | goto encode_op; |
| 1667 | } |
| 1668 | } else if (current_fh->fh_export->ex_fslocs.migrated && |
| 1669 | !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { |
| 1670 | op->status = nfserr_moved; |
| 1671 | goto encode_op; |
| 1672 | } |
| 1673 | |
| 1674 | fh_clear_wcc(current_fh); |
| 1675 | |
| 1676 | /* If op is non-idempotent */ |
| 1677 | if (opdesc->op_flags & OP_MODIFIES_SOMETHING) { |
| 1678 | /* |
| 1679 | * Don't execute this op if we couldn't encode a |
| 1680 | * succesful reply: |
| 1681 | */ |
| 1682 | u32 plen = opdesc->op_rsize_bop(rqstp, op); |
| 1683 | /* |
| 1684 | * Plus if there's another operation, make sure |
| 1685 | * we'll have space to at least encode an error: |
| 1686 | */ |
| 1687 | if (resp->opcnt < args->opcnt) |
| 1688 | plen += COMPOUND_ERR_SLACK_SPACE; |
| 1689 | op->status = nfsd4_check_resp_size(resp, plen); |
| 1690 | } |
| 1691 | |
| 1692 | if (op->status) |
| 1693 | goto encode_op; |
| 1694 | |
| 1695 | if (opdesc->op_get_currentstateid) |
| 1696 | opdesc->op_get_currentstateid(cstate, &op->u); |
| 1697 | op->status = opdesc->op_func(rqstp, cstate, &op->u); |
| 1698 | |
| 1699 | if (!op->status) { |
| 1700 | if (opdesc->op_set_currentstateid) |
| 1701 | opdesc->op_set_currentstateid(cstate, &op->u); |
| 1702 | |
| 1703 | if (opdesc->op_flags & OP_CLEAR_STATEID) |
| 1704 | clear_current_stateid(cstate); |
| 1705 | |
| 1706 | if (need_wrongsec_check(rqstp)) |
| 1707 | op->status = check_nfsd_access(current_fh->fh_export, rqstp); |
| 1708 | } |
| 1709 | |
| 1710 | encode_op: |
| 1711 | /* Only from SEQUENCE */ |
| 1712 | if (cstate->status == nfserr_replay_cache) { |
| 1713 | dprintk("%s NFS4.1 replay from cache\n", __func__); |
| 1714 | status = op->status; |
| 1715 | goto out; |
| 1716 | } |
| 1717 | if (op->status == nfserr_replay_me) { |
| 1718 | op->replay = &cstate->replay_owner->so_replay; |
| 1719 | nfsd4_encode_replay(&resp->xdr, op); |
| 1720 | status = op->status = op->replay->rp_status; |
| 1721 | } else { |
| 1722 | nfsd4_encode_operation(resp, op); |
| 1723 | status = op->status; |
| 1724 | } |
| 1725 | |
| 1726 | dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", |
| 1727 | args->ops, args->opcnt, resp->opcnt, op->opnum, |
| 1728 | be32_to_cpu(status)); |
| 1729 | |
| 1730 | nfsd4_cstate_clear_replay(cstate); |
| 1731 | /* XXX Ugh, we need to get rid of this kind of special case: */ |
| 1732 | if (op->opnum == OP_READ && op->u.read.rd_filp) |
| 1733 | fput(op->u.read.rd_filp); |
| 1734 | |
| 1735 | nfsd4_increment_op_stats(op->opnum); |
| 1736 | } |
| 1737 | |
| 1738 | cstate->status = status; |
| 1739 | fh_put(current_fh); |
| 1740 | fh_put(save_fh); |
| 1741 | BUG_ON(cstate->replay_owner); |
| 1742 | out: |
| 1743 | /* Reset deferral mechanism for RPC deferrals */ |
| 1744 | set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); |
| 1745 | dprintk("nfsv4 compound returned %d\n", ntohl(status)); |
| 1746 | return status; |
| 1747 | } |
| 1748 | |
| 1749 | #define op_encode_hdr_size (2) |
| 1750 | #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) |
| 1751 | #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) |
| 1752 | #define op_encode_change_info_maxsz (5) |
| 1753 | #define nfs4_fattr_bitmap_maxsz (4) |
| 1754 | |
| 1755 | /* We'll fall back on returning no lockowner if run out of space: */ |
| 1756 | #define op_encode_lockowner_maxsz (0) |
| 1757 | #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) |
| 1758 | |
| 1759 | #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) |
| 1760 | |
| 1761 | #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) |
| 1762 | #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ |
| 1763 | op_encode_ace_maxsz) |
| 1764 | |
| 1765 | #define op_encode_channel_attrs_maxsz (6 + 1 + 1) |
| 1766 | |
| 1767 | static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| 1768 | { |
| 1769 | return (op_encode_hdr_size) * sizeof(__be32); |
| 1770 | } |
| 1771 | |
| 1772 | static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| 1773 | { |
| 1774 | return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); |
| 1775 | } |
| 1776 | |
| 1777 | static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| 1778 | { |
| 1779 | return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); |
| 1780 | } |
| 1781 | |
| 1782 | static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| 1783 | { |
| 1784 | return (op_encode_hdr_size + op_encode_change_info_maxsz |
| 1785 | + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); |
| 1786 | } |
| 1787 | |
| 1788 | /* |
| 1789 | * Note since this is an idempotent operation we won't insist on failing |
| 1790 | * the op prematurely if the estimate is too large. We may turn off splice |
| 1791 | * reads unnecessarily. |
| 1792 | */ |
| 1793 | static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, |
| 1794 | struct nfsd4_op *op) |
| 1795 | { |
| 1796 | u32 *bmap = op->u.getattr.ga_bmval; |
| 1797 | u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; |
| 1798 | u32 ret = 0; |
| 1799 | |
| 1800 | if (bmap0 & FATTR4_WORD0_ACL) |
| 1801 | return svc_max_payload(rqstp); |
| 1802 | if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) |
| 1803 | return svc_max_payload(rqstp); |
| 1804 | |
| 1805 | if (bmap1 & FATTR4_WORD1_OWNER) { |
| 1806 | ret += IDMAP_NAMESZ + 4; |
| 1807 | bmap1 &= ~FATTR4_WORD1_OWNER; |
| 1808 | } |
| 1809 | if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { |
| 1810 | ret += IDMAP_NAMESZ + 4; |
| 1811 | bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; |
| 1812 | } |
| 1813 | if (bmap0 & FATTR4_WORD0_FILEHANDLE) { |
| 1814 | ret += NFS4_FHSIZE + 4; |
| 1815 | bmap0 &= ~FATTR4_WORD0_FILEHANDLE; |
| 1816 | } |
| 1817 | if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { |
| 1818 | ret += NFSD4_MAX_SEC_LABEL_LEN + 12; |
| 1819 | bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; |
| 1820 | } |
| 1821 | /* |
| 1822 | * Largest of remaining attributes are 16 bytes (e.g., |
| 1823 | * supported_attributes) |
| 1824 | */ |
| 1825 | ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); |
| 1826 | /* bitmask, length */ |
| 1827 | ret += 20; |
| 1828 | return ret; |
| 1829 | } |
| 1830 | |
| 1831 | static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| 1832 | { |
| 1833 | return (op_encode_hdr_size + op_encode_change_info_maxsz) |
| 1834 | * sizeof(__be32); |
| 1835 | } |
| 1836 | |
| 1837 | static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| 1838 | { |
| 1839 | return (op_encode_hdr_size + op_encode_lock_denied_maxsz) |
| 1840 | * sizeof(__be32); |
| 1841 | } |
| 1842 | |
| 1843 | static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| 1844 | { |
| 1845 | return (op_encode_hdr_size + op_encode_stateid_maxsz |
| 1846 | + op_encode_change_info_maxsz + 1 |
| 1847 | + nfs4_fattr_bitmap_maxsz |
| 1848 | + op_encode_delegation_maxsz) * sizeof(__be32); |
| 1849 | } |
| 1850 | |
| 1851 | static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| 1852 | { |
| 1853 | u32 maxcount = 0, rlen = 0; |
| 1854 | |
| 1855 | maxcount = svc_max_payload(rqstp); |
| 1856 | rlen = min(op->u.read.rd_length, maxcount); |
| 1857 | |
| 1858 | return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); |
| 1859 | } |
| 1860 | |
| 1861 | static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| 1862 | { |
| 1863 | u32 maxcount = 0, rlen = 0; |
| 1864 | |
| 1865 | maxcount = svc_max_payload(rqstp); |
| 1866 | rlen = min(op->u.readdir.rd_maxcount, maxcount); |
| 1867 | |
| 1868 | return (op_encode_hdr_size + op_encode_verifier_maxsz + |
| 1869 | XDR_QUADLEN(rlen)) * sizeof(__be32); |
| 1870 | } |
| 1871 | |
| 1872 | static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| 1873 | { |
| 1874 | return (op_encode_hdr_size + op_encode_change_info_maxsz) |
| 1875 | * sizeof(__be32); |
| 1876 | } |
| 1877 | |
| 1878 | static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| 1879 | { |
| 1880 | return (op_encode_hdr_size + op_encode_change_info_maxsz |
| 1881 | + op_encode_change_info_maxsz) * sizeof(__be32); |
| 1882 | } |
| 1883 | |
| 1884 | static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, |
| 1885 | struct nfsd4_op *op) |
| 1886 | { |
| 1887 | return (op_encode_hdr_size |
| 1888 | + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32); |
| 1889 | } |
| 1890 | |
| 1891 | static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| 1892 | { |
| 1893 | return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); |
| 1894 | } |
| 1895 | |
| 1896 | static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| 1897 | { |
| 1898 | return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * |
| 1899 | sizeof(__be32); |
| 1900 | } |
| 1901 | |
| 1902 | static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| 1903 | { |
| 1904 | return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); |
| 1905 | } |
| 1906 | |
| 1907 | static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| 1908 | { |
| 1909 | return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ |
| 1910 | 1 + 1 + /* eir_flags, spr_how */\ |
| 1911 | 4 + /* spo_must_enforce & _allow with bitmap */\ |
| 1912 | 2 + /*eir_server_owner.so_minor_id */\ |
| 1913 | /* eir_server_owner.so_major_id<> */\ |
| 1914 | XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ |
| 1915 | /* eir_server_scope<> */\ |
| 1916 | XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ |
| 1917 | 1 + /* eir_server_impl_id array length */\ |
| 1918 | 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); |
| 1919 | } |
| 1920 | |
| 1921 | static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| 1922 | { |
| 1923 | return (op_encode_hdr_size + \ |
| 1924 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ |
| 1925 | 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); |
| 1926 | } |
| 1927 | |
| 1928 | static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| 1929 | { |
| 1930 | return (op_encode_hdr_size + \ |
| 1931 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ |
| 1932 | 2 + /* csr_sequence, csr_flags */\ |
| 1933 | op_encode_channel_attrs_maxsz + \ |
| 1934 | op_encode_channel_attrs_maxsz) * sizeof(__be32); |
| 1935 | } |
| 1936 | |
| 1937 | #ifdef CONFIG_NFSD_PNFS |
| 1938 | /* |
| 1939 | * At this stage we don't really know what layout driver will handle the request, |
| 1940 | * so we need to define an arbitrary upper bound here. |
| 1941 | */ |
| 1942 | #define MAX_LAYOUT_SIZE 128 |
| 1943 | static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| 1944 | { |
| 1945 | return (op_encode_hdr_size + |
| 1946 | 1 /* logr_return_on_close */ + |
| 1947 | op_encode_stateid_maxsz + |
| 1948 | 1 /* nr of layouts */ + |
| 1949 | MAX_LAYOUT_SIZE) * sizeof(__be32); |
| 1950 | } |
| 1951 | |
| 1952 | static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| 1953 | { |
| 1954 | return (op_encode_hdr_size + |
| 1955 | 1 /* locr_newsize */ + |
| 1956 | 2 /* ns_size */) * sizeof(__be32); |
| 1957 | } |
| 1958 | |
| 1959 | static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| 1960 | { |
| 1961 | return (op_encode_hdr_size + |
| 1962 | 1 /* lrs_stateid */ + |
| 1963 | op_encode_stateid_maxsz) * sizeof(__be32); |
| 1964 | } |
| 1965 | #endif /* CONFIG_NFSD_PNFS */ |
| 1966 | |
| 1967 | static struct nfsd4_operation nfsd4_ops[] = { |
| 1968 | [OP_ACCESS] = { |
| 1969 | .op_func = (nfsd4op_func)nfsd4_access, |
| 1970 | .op_name = "OP_ACCESS", |
| 1971 | }, |
| 1972 | [OP_CLOSE] = { |
| 1973 | .op_func = (nfsd4op_func)nfsd4_close, |
| 1974 | .op_flags = OP_MODIFIES_SOMETHING, |
| 1975 | .op_name = "OP_CLOSE", |
| 1976 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, |
| 1977 | .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid, |
| 1978 | .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid, |
| 1979 | }, |
| 1980 | [OP_COMMIT] = { |
| 1981 | .op_func = (nfsd4op_func)nfsd4_commit, |
| 1982 | .op_flags = OP_MODIFIES_SOMETHING, |
| 1983 | .op_name = "OP_COMMIT", |
| 1984 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize, |
| 1985 | }, |
| 1986 | [OP_CREATE] = { |
| 1987 | .op_func = (nfsd4op_func)nfsd4_create, |
| 1988 | .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, |
| 1989 | .op_name = "OP_CREATE", |
| 1990 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize, |
| 1991 | }, |
| 1992 | [OP_DELEGRETURN] = { |
| 1993 | .op_func = (nfsd4op_func)nfsd4_delegreturn, |
| 1994 | .op_flags = OP_MODIFIES_SOMETHING, |
| 1995 | .op_name = "OP_DELEGRETURN", |
| 1996 | .op_rsize_bop = nfsd4_only_status_rsize, |
| 1997 | .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid, |
| 1998 | }, |
| 1999 | [OP_GETATTR] = { |
| 2000 | .op_func = (nfsd4op_func)nfsd4_getattr, |
| 2001 | .op_flags = ALLOWED_ON_ABSENT_FS, |
| 2002 | .op_rsize_bop = nfsd4_getattr_rsize, |
| 2003 | .op_name = "OP_GETATTR", |
| 2004 | }, |
| 2005 | [OP_GETFH] = { |
| 2006 | .op_func = (nfsd4op_func)nfsd4_getfh, |
| 2007 | .op_name = "OP_GETFH", |
| 2008 | }, |
| 2009 | [OP_LINK] = { |
| 2010 | .op_func = (nfsd4op_func)nfsd4_link, |
| 2011 | .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING |
| 2012 | | OP_CACHEME, |
| 2013 | .op_name = "OP_LINK", |
| 2014 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize, |
| 2015 | }, |
| 2016 | [OP_LOCK] = { |
| 2017 | .op_func = (nfsd4op_func)nfsd4_lock, |
| 2018 | .op_flags = OP_MODIFIES_SOMETHING, |
| 2019 | .op_name = "OP_LOCK", |
| 2020 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize, |
| 2021 | .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid, |
| 2022 | }, |
| 2023 | [OP_LOCKT] = { |
| 2024 | .op_func = (nfsd4op_func)nfsd4_lockt, |
| 2025 | .op_name = "OP_LOCKT", |
| 2026 | }, |
| 2027 | [OP_LOCKU] = { |
| 2028 | .op_func = (nfsd4op_func)nfsd4_locku, |
| 2029 | .op_flags = OP_MODIFIES_SOMETHING, |
| 2030 | .op_name = "OP_LOCKU", |
| 2031 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, |
| 2032 | .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid, |
| 2033 | }, |
| 2034 | [OP_LOOKUP] = { |
| 2035 | .op_func = (nfsd4op_func)nfsd4_lookup, |
| 2036 | .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, |
| 2037 | .op_name = "OP_LOOKUP", |
| 2038 | }, |
| 2039 | [OP_LOOKUPP] = { |
| 2040 | .op_func = (nfsd4op_func)nfsd4_lookupp, |
| 2041 | .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, |
| 2042 | .op_name = "OP_LOOKUPP", |
| 2043 | }, |
| 2044 | [OP_NVERIFY] = { |
| 2045 | .op_func = (nfsd4op_func)nfsd4_nverify, |
| 2046 | .op_name = "OP_NVERIFY", |
| 2047 | }, |
| 2048 | [OP_OPEN] = { |
| 2049 | .op_func = (nfsd4op_func)nfsd4_open, |
| 2050 | .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, |
| 2051 | .op_name = "OP_OPEN", |
| 2052 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize, |
| 2053 | .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid, |
| 2054 | }, |
| 2055 | [OP_OPEN_CONFIRM] = { |
| 2056 | .op_func = (nfsd4op_func)nfsd4_open_confirm, |
| 2057 | .op_flags = OP_MODIFIES_SOMETHING, |
| 2058 | .op_name = "OP_OPEN_CONFIRM", |
| 2059 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, |
| 2060 | }, |
| 2061 | [OP_OPEN_DOWNGRADE] = { |
| 2062 | .op_func = (nfsd4op_func)nfsd4_open_downgrade, |
| 2063 | .op_flags = OP_MODIFIES_SOMETHING, |
| 2064 | .op_name = "OP_OPEN_DOWNGRADE", |
| 2065 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, |
| 2066 | .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid, |
| 2067 | .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid, |
| 2068 | }, |
| 2069 | [OP_PUTFH] = { |
| 2070 | .op_func = (nfsd4op_func)nfsd4_putfh, |
| 2071 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS |
| 2072 | | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, |
| 2073 | .op_name = "OP_PUTFH", |
| 2074 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, |
| 2075 | }, |
| 2076 | [OP_PUTPUBFH] = { |
| 2077 | .op_func = (nfsd4op_func)nfsd4_putrootfh, |
| 2078 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS |
| 2079 | | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, |
| 2080 | .op_name = "OP_PUTPUBFH", |
| 2081 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, |
| 2082 | }, |
| 2083 | [OP_PUTROOTFH] = { |
| 2084 | .op_func = (nfsd4op_func)nfsd4_putrootfh, |
| 2085 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS |
| 2086 | | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, |
| 2087 | .op_name = "OP_PUTROOTFH", |
| 2088 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, |
| 2089 | }, |
| 2090 | [OP_READ] = { |
| 2091 | .op_func = (nfsd4op_func)nfsd4_read, |
| 2092 | .op_name = "OP_READ", |
| 2093 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize, |
| 2094 | .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid, |
| 2095 | }, |
| 2096 | [OP_READDIR] = { |
| 2097 | .op_func = (nfsd4op_func)nfsd4_readdir, |
| 2098 | .op_name = "OP_READDIR", |
| 2099 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize, |
| 2100 | }, |
| 2101 | [OP_READLINK] = { |
| 2102 | .op_func = (nfsd4op_func)nfsd4_readlink, |
| 2103 | .op_name = "OP_READLINK", |
| 2104 | }, |
| 2105 | [OP_REMOVE] = { |
| 2106 | .op_func = (nfsd4op_func)nfsd4_remove, |
| 2107 | .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, |
| 2108 | .op_name = "OP_REMOVE", |
| 2109 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize, |
| 2110 | }, |
| 2111 | [OP_RENAME] = { |
| 2112 | .op_func = (nfsd4op_func)nfsd4_rename, |
| 2113 | .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, |
| 2114 | .op_name = "OP_RENAME", |
| 2115 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize, |
| 2116 | }, |
| 2117 | [OP_RENEW] = { |
| 2118 | .op_func = (nfsd4op_func)nfsd4_renew, |
| 2119 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS |
| 2120 | | OP_MODIFIES_SOMETHING, |
| 2121 | .op_name = "OP_RENEW", |
| 2122 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, |
| 2123 | |
| 2124 | }, |
| 2125 | [OP_RESTOREFH] = { |
| 2126 | .op_func = (nfsd4op_func)nfsd4_restorefh, |
| 2127 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS |
| 2128 | | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, |
| 2129 | .op_name = "OP_RESTOREFH", |
| 2130 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, |
| 2131 | }, |
| 2132 | [OP_SAVEFH] = { |
| 2133 | .op_func = (nfsd4op_func)nfsd4_savefh, |
| 2134 | .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, |
| 2135 | .op_name = "OP_SAVEFH", |
| 2136 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, |
| 2137 | }, |
| 2138 | [OP_SECINFO] = { |
| 2139 | .op_func = (nfsd4op_func)nfsd4_secinfo, |
| 2140 | .op_flags = OP_HANDLES_WRONGSEC, |
| 2141 | .op_name = "OP_SECINFO", |
| 2142 | }, |
| 2143 | [OP_SETATTR] = { |
| 2144 | .op_func = (nfsd4op_func)nfsd4_setattr, |
| 2145 | .op_name = "OP_SETATTR", |
| 2146 | .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, |
| 2147 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize, |
| 2148 | .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid, |
| 2149 | }, |
| 2150 | [OP_SETCLIENTID] = { |
| 2151 | .op_func = (nfsd4op_func)nfsd4_setclientid, |
| 2152 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS |
| 2153 | | OP_MODIFIES_SOMETHING | OP_CACHEME, |
| 2154 | .op_name = "OP_SETCLIENTID", |
| 2155 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize, |
| 2156 | }, |
| 2157 | [OP_SETCLIENTID_CONFIRM] = { |
| 2158 | .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, |
| 2159 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS |
| 2160 | | OP_MODIFIES_SOMETHING | OP_CACHEME, |
| 2161 | .op_name = "OP_SETCLIENTID_CONFIRM", |
| 2162 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, |
| 2163 | }, |
| 2164 | [OP_VERIFY] = { |
| 2165 | .op_func = (nfsd4op_func)nfsd4_verify, |
| 2166 | .op_name = "OP_VERIFY", |
| 2167 | }, |
| 2168 | [OP_WRITE] = { |
| 2169 | .op_func = (nfsd4op_func)nfsd4_write, |
| 2170 | .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, |
| 2171 | .op_name = "OP_WRITE", |
| 2172 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, |
| 2173 | .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid, |
| 2174 | }, |
| 2175 | [OP_RELEASE_LOCKOWNER] = { |
| 2176 | .op_func = (nfsd4op_func)nfsd4_release_lockowner, |
| 2177 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS |
| 2178 | | OP_MODIFIES_SOMETHING, |
| 2179 | .op_name = "OP_RELEASE_LOCKOWNER", |
| 2180 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, |
| 2181 | }, |
| 2182 | |
| 2183 | /* NFSv4.1 operations */ |
| 2184 | [OP_EXCHANGE_ID] = { |
| 2185 | .op_func = (nfsd4op_func)nfsd4_exchange_id, |
| 2186 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP |
| 2187 | | OP_MODIFIES_SOMETHING, |
| 2188 | .op_name = "OP_EXCHANGE_ID", |
| 2189 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize, |
| 2190 | }, |
| 2191 | [OP_BACKCHANNEL_CTL] = { |
| 2192 | .op_func = (nfsd4op_func)nfsd4_backchannel_ctl, |
| 2193 | .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, |
| 2194 | .op_name = "OP_BACKCHANNEL_CTL", |
| 2195 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, |
| 2196 | }, |
| 2197 | [OP_BIND_CONN_TO_SESSION] = { |
| 2198 | .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session, |
| 2199 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP |
| 2200 | | OP_MODIFIES_SOMETHING, |
| 2201 | .op_name = "OP_BIND_CONN_TO_SESSION", |
| 2202 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize, |
| 2203 | }, |
| 2204 | [OP_CREATE_SESSION] = { |
| 2205 | .op_func = (nfsd4op_func)nfsd4_create_session, |
| 2206 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP |
| 2207 | | OP_MODIFIES_SOMETHING, |
| 2208 | .op_name = "OP_CREATE_SESSION", |
| 2209 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize, |
| 2210 | }, |
| 2211 | [OP_DESTROY_SESSION] = { |
| 2212 | .op_func = (nfsd4op_func)nfsd4_destroy_session, |
| 2213 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP |
| 2214 | | OP_MODIFIES_SOMETHING, |
| 2215 | .op_name = "OP_DESTROY_SESSION", |
| 2216 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, |
| 2217 | }, |
| 2218 | [OP_SEQUENCE] = { |
| 2219 | .op_func = (nfsd4op_func)nfsd4_sequence, |
| 2220 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, |
| 2221 | .op_name = "OP_SEQUENCE", |
| 2222 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_sequence_rsize, |
| 2223 | }, |
| 2224 | [OP_DESTROY_CLIENTID] = { |
| 2225 | .op_func = (nfsd4op_func)nfsd4_destroy_clientid, |
| 2226 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP |
| 2227 | | OP_MODIFIES_SOMETHING, |
| 2228 | .op_name = "OP_DESTROY_CLIENTID", |
| 2229 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, |
| 2230 | }, |
| 2231 | [OP_RECLAIM_COMPLETE] = { |
| 2232 | .op_func = (nfsd4op_func)nfsd4_reclaim_complete, |
| 2233 | .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, |
| 2234 | .op_name = "OP_RECLAIM_COMPLETE", |
| 2235 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, |
| 2236 | }, |
| 2237 | [OP_SECINFO_NO_NAME] = { |
| 2238 | .op_func = (nfsd4op_func)nfsd4_secinfo_no_name, |
| 2239 | .op_flags = OP_HANDLES_WRONGSEC, |
| 2240 | .op_name = "OP_SECINFO_NO_NAME", |
| 2241 | }, |
| 2242 | [OP_TEST_STATEID] = { |
| 2243 | .op_func = (nfsd4op_func)nfsd4_test_stateid, |
| 2244 | .op_flags = ALLOWED_WITHOUT_FH, |
| 2245 | .op_name = "OP_TEST_STATEID", |
| 2246 | }, |
| 2247 | [OP_FREE_STATEID] = { |
| 2248 | .op_func = (nfsd4op_func)nfsd4_free_stateid, |
| 2249 | .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, |
| 2250 | .op_name = "OP_FREE_STATEID", |
| 2251 | .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid, |
| 2252 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, |
| 2253 | }, |
| 2254 | #ifdef CONFIG_NFSD_PNFS |
| 2255 | [OP_GETDEVICEINFO] = { |
| 2256 | .op_func = (nfsd4op_func)nfsd4_getdeviceinfo, |
| 2257 | .op_flags = ALLOWED_WITHOUT_FH, |
| 2258 | .op_name = "OP_GETDEVICEINFO", |
| 2259 | }, |
| 2260 | [OP_LAYOUTGET] = { |
| 2261 | .op_func = (nfsd4op_func)nfsd4_layoutget, |
| 2262 | .op_flags = OP_MODIFIES_SOMETHING, |
| 2263 | .op_name = "OP_LAYOUTGET", |
| 2264 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutget_rsize, |
| 2265 | }, |
| 2266 | [OP_LAYOUTCOMMIT] = { |
| 2267 | .op_func = (nfsd4op_func)nfsd4_layoutcommit, |
| 2268 | .op_flags = OP_MODIFIES_SOMETHING, |
| 2269 | .op_name = "OP_LAYOUTCOMMIT", |
| 2270 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutcommit_rsize, |
| 2271 | }, |
| 2272 | [OP_LAYOUTRETURN] = { |
| 2273 | .op_func = (nfsd4op_func)nfsd4_layoutreturn, |
| 2274 | .op_flags = OP_MODIFIES_SOMETHING, |
| 2275 | .op_name = "OP_LAYOUTRETURN", |
| 2276 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutreturn_rsize, |
| 2277 | }, |
| 2278 | #endif /* CONFIG_NFSD_PNFS */ |
| 2279 | |
| 2280 | /* NFSv4.2 operations */ |
| 2281 | [OP_ALLOCATE] = { |
| 2282 | .op_func = (nfsd4op_func)nfsd4_allocate, |
| 2283 | .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, |
| 2284 | .op_name = "OP_ALLOCATE", |
| 2285 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, |
| 2286 | }, |
| 2287 | [OP_DEALLOCATE] = { |
| 2288 | .op_func = (nfsd4op_func)nfsd4_deallocate, |
| 2289 | .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, |
| 2290 | .op_name = "OP_DEALLOCATE", |
| 2291 | .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, |
| 2292 | }, |
| 2293 | [OP_SEEK] = { |
| 2294 | .op_func = (nfsd4op_func)nfsd4_seek, |
| 2295 | .op_name = "OP_SEEK", |
| 2296 | }, |
| 2297 | }; |
| 2298 | |
| 2299 | int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| 2300 | { |
| 2301 | struct nfsd4_operation *opdesc; |
| 2302 | nfsd4op_rsize estimator; |
| 2303 | |
| 2304 | if (op->opnum == OP_ILLEGAL) |
| 2305 | return op_encode_hdr_size * sizeof(__be32); |
| 2306 | opdesc = OPDESC(op); |
| 2307 | estimator = opdesc->op_rsize_bop; |
| 2308 | return estimator ? estimator(rqstp, op) : PAGE_SIZE; |
| 2309 | } |
| 2310 | |
| 2311 | void warn_on_nonidempotent_op(struct nfsd4_op *op) |
| 2312 | { |
| 2313 | if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { |
| 2314 | pr_err("unable to encode reply to nonidempotent op %d (%s)\n", |
| 2315 | op->opnum, nfsd4_op_name(op->opnum)); |
| 2316 | WARN_ON_ONCE(1); |
| 2317 | } |
| 2318 | } |
| 2319 | |
| 2320 | static const char *nfsd4_op_name(unsigned opnum) |
| 2321 | { |
| 2322 | if (opnum < ARRAY_SIZE(nfsd4_ops)) |
| 2323 | return nfsd4_ops[opnum].op_name; |
| 2324 | return "unknown_operation"; |
| 2325 | } |
| 2326 | |
| 2327 | #define nfsd4_voidres nfsd4_voidargs |
| 2328 | struct nfsd4_voidargs { int dummy; }; |
| 2329 | |
| 2330 | static struct svc_procedure nfsd_procedures4[2] = { |
| 2331 | [NFSPROC4_NULL] = { |
| 2332 | .pc_func = (svc_procfunc) nfsd4_proc_null, |
| 2333 | .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, |
| 2334 | .pc_argsize = sizeof(struct nfsd4_voidargs), |
| 2335 | .pc_ressize = sizeof(struct nfsd4_voidres), |
| 2336 | .pc_cachetype = RC_NOCACHE, |
| 2337 | .pc_xdrressize = 1, |
| 2338 | }, |
| 2339 | [NFSPROC4_COMPOUND] = { |
| 2340 | .pc_func = (svc_procfunc) nfsd4_proc_compound, |
| 2341 | .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, |
| 2342 | .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, |
| 2343 | .pc_argsize = sizeof(struct nfsd4_compoundargs), |
| 2344 | .pc_ressize = sizeof(struct nfsd4_compoundres), |
| 2345 | .pc_release = nfsd4_release_compoundargs, |
| 2346 | .pc_cachetype = RC_NOCACHE, |
| 2347 | .pc_xdrressize = NFSD_BUFSIZE/4, |
| 2348 | }, |
| 2349 | }; |
| 2350 | |
| 2351 | struct svc_version nfsd_version4 = { |
| 2352 | .vs_vers = 4, |
| 2353 | .vs_nproc = 2, |
| 2354 | .vs_proc = nfsd_procedures4, |
| 2355 | .vs_dispatch = nfsd_dispatch, |
| 2356 | .vs_xdrsize = NFS4_SVC_XDRSIZE, |
| 2357 | .vs_rpcb_optnl = 1, |
| 2358 | }; |
| 2359 | |
| 2360 | /* |
| 2361 | * Local variables: |
| 2362 | * c-basic-offset: 8 |
| 2363 | * End: |
| 2364 | */ |