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1// SPDX-License-Identifier: GPL-2.0-or-later
2/* YFS File Server client stubs
3 *
4 * Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
6 */
7
8#include <linux/init.h>
9#include <linux/slab.h>
10#include <linux/sched.h>
11#include <linux/circ_buf.h>
12#include <linux/iversion.h>
13#include "internal.h"
14#include "afs_fs.h"
15#include "xdr_fs.h"
16#include "protocol_yfs.h"
17
18#define xdr_size(x) (sizeof(*x) / sizeof(__be32))
19
20static void xdr_decode_YFSFid(const __be32 **_bp, struct afs_fid *fid)
21{
22 const struct yfs_xdr_YFSFid *x = (const void *)*_bp;
23
24 fid->vid = xdr_to_u64(x->volume);
25 fid->vnode = xdr_to_u64(x->vnode.lo);
26 fid->vnode_hi = ntohl(x->vnode.hi);
27 fid->unique = ntohl(x->vnode.unique);
28 *_bp += xdr_size(x);
29}
30
31static __be32 *xdr_encode_u32(__be32 *bp, u32 n)
32{
33 *bp++ = htonl(n);
34 return bp;
35}
36
37static __be32 *xdr_encode_u64(__be32 *bp, u64 n)
38{
39 struct yfs_xdr_u64 *x = (void *)bp;
40
41 *x = u64_to_xdr(n);
42 return bp + xdr_size(x);
43}
44
45static __be32 *xdr_encode_YFSFid(__be32 *bp, struct afs_fid *fid)
46{
47 struct yfs_xdr_YFSFid *x = (void *)bp;
48
49 x->volume = u64_to_xdr(fid->vid);
50 x->vnode.lo = u64_to_xdr(fid->vnode);
51 x->vnode.hi = htonl(fid->vnode_hi);
52 x->vnode.unique = htonl(fid->unique);
53 return bp + xdr_size(x);
54}
55
56static size_t xdr_strlen(unsigned int len)
57{
58 return sizeof(__be32) + round_up(len, sizeof(__be32));
59}
60
61static __be32 *xdr_encode_string(__be32 *bp, const char *p, unsigned int len)
62{
63 bp = xdr_encode_u32(bp, len);
64 bp = memcpy(bp, p, len);
65 if (len & 3) {
66 unsigned int pad = 4 - (len & 3);
67
68 memset((u8 *)bp + len, 0, pad);
69 len += pad;
70 }
71
72 return bp + len / sizeof(__be32);
73}
74
75static __be32 *xdr_encode_name(__be32 *bp, const struct qstr *p)
76{
77 return xdr_encode_string(bp, p->name, p->len);
78}
79
80static s64 linux_to_yfs_time(const struct timespec64 *t)
81{
82 /* Convert to 100ns intervals. */
83 return (u64)t->tv_sec * 10000000 + t->tv_nsec/100;
84}
85
86static __be32 *xdr_encode_YFSStoreStatus(__be32 *bp, mode_t *mode,
87 const struct timespec64 *t)
88{
89 struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
90 mode_t masked_mode = mode ? *mode & S_IALLUGO : 0;
91 s64 mtime = linux_to_yfs_time(t);
92 u32 mask = AFS_SET_MTIME;
93
94 mask |= mode ? AFS_SET_MODE : 0;
95
96 x->mask = htonl(mask);
97 x->mode = htonl(masked_mode);
98 x->mtime_client = u64_to_xdr(mtime);
99 x->owner = u64_to_xdr(0);
100 x->group = u64_to_xdr(0);
101 return bp + xdr_size(x);
102}
103
104/*
105 * Convert a signed 100ns-resolution 64-bit time into a timespec.
106 */
107static struct timespec64 yfs_time_to_linux(s64 t)
108{
109 struct timespec64 ts;
110 u64 abs_t;
111
112 /*
113 * Unfortunately can not use normal 64 bit division on 32 bit arch, but
114 * the alternative, do_div, does not work with negative numbers so have
115 * to special case them
116 */
117 if (t < 0) {
118 abs_t = -t;
119 ts.tv_nsec = (time64_t)(do_div(abs_t, 10000000) * 100);
120 ts.tv_nsec = -ts.tv_nsec;
121 ts.tv_sec = -abs_t;
122 } else {
123 abs_t = t;
124 ts.tv_nsec = (time64_t)do_div(abs_t, 10000000) * 100;
125 ts.tv_sec = abs_t;
126 }
127
128 return ts;
129}
130
131static struct timespec64 xdr_to_time(const struct yfs_xdr_u64 xdr)
132{
133 s64 t = xdr_to_u64(xdr);
134
135 return yfs_time_to_linux(t);
136}
137
138static void yfs_check_req(struct afs_call *call, __be32 *bp)
139{
140 size_t len = (void *)bp - call->request;
141
142 if (len > call->request_size)
143 pr_err("kAFS: %s: Request buffer overflow (%zu>%u)\n",
144 call->type->name, len, call->request_size);
145 else if (len < call->request_size)
146 pr_warn("kAFS: %s: Request buffer underflow (%zu<%u)\n",
147 call->type->name, len, call->request_size);
148}
149
150/*
151 * Dump a bad file status record.
152 */
153static void xdr_dump_bad(const __be32 *bp)
154{
155 __be32 x[4];
156 int i;
157
158 pr_notice("YFS XDR: Bad status record\n");
159 for (i = 0; i < 6 * 4 * 4; i += 16) {
160 memcpy(x, bp, 16);
161 bp += 4;
162 pr_notice("%03x: %08x %08x %08x %08x\n",
163 i, ntohl(x[0]), ntohl(x[1]), ntohl(x[2]), ntohl(x[3]));
164 }
165
166 memcpy(x, bp, 8);
167 pr_notice("0x60: %08x %08x\n", ntohl(x[0]), ntohl(x[1]));
168}
169
170/*
171 * Decode a YFSFetchStatus block
172 */
173static void xdr_decode_YFSFetchStatus(const __be32 **_bp,
174 struct afs_call *call,
175 struct afs_status_cb *scb)
176{
177 const struct yfs_xdr_YFSFetchStatus *xdr = (const void *)*_bp;
178 struct afs_file_status *status = &scb->status;
179 u32 type;
180
181 status->abort_code = ntohl(xdr->abort_code);
182 if (status->abort_code != 0) {
183 if (status->abort_code == VNOVNODE)
184 status->nlink = 0;
185 scb->have_error = true;
186 goto advance;
187 }
188
189 type = ntohl(xdr->type);
190 switch (type) {
191 case AFS_FTYPE_FILE:
192 case AFS_FTYPE_DIR:
193 case AFS_FTYPE_SYMLINK:
194 status->type = type;
195 break;
196 default:
197 goto bad;
198 }
199
200 status->nlink = ntohl(xdr->nlink);
201 status->author = xdr_to_u64(xdr->author);
202 status->owner = xdr_to_u64(xdr->owner);
203 status->caller_access = ntohl(xdr->caller_access); /* Ticket dependent */
204 status->anon_access = ntohl(xdr->anon_access);
205 status->mode = ntohl(xdr->mode) & S_IALLUGO;
206 status->group = xdr_to_u64(xdr->group);
207 status->lock_count = ntohl(xdr->lock_count);
208
209 status->mtime_client = xdr_to_time(xdr->mtime_client);
210 status->mtime_server = xdr_to_time(xdr->mtime_server);
211 status->size = xdr_to_u64(xdr->size);
212 status->data_version = xdr_to_u64(xdr->data_version);
213 scb->have_status = true;
214advance:
215 *_bp += xdr_size(xdr);
216 return;
217
218bad:
219 xdr_dump_bad(*_bp);
220 afs_protocol_error(call, afs_eproto_bad_status);
221 goto advance;
222}
223
224/*
225 * Decode a YFSCallBack block
226 */
227static void xdr_decode_YFSCallBack(const __be32 **_bp,
228 struct afs_call *call,
229 struct afs_status_cb *scb)
230{
231 struct yfs_xdr_YFSCallBack *x = (void *)*_bp;
232 struct afs_callback *cb = &scb->callback;
233 ktime_t cb_expiry;
234
235 cb_expiry = ktime_add(call->issue_time, xdr_to_u64(x->expiration_time) * 100);
236 cb->expires_at = ktime_divns(cb_expiry, NSEC_PER_SEC);
237 scb->have_cb = true;
238 *_bp += xdr_size(x);
239}
240
241/*
242 * Decode a YFSVolSync block
243 */
244static void xdr_decode_YFSVolSync(const __be32 **_bp,
245 struct afs_volsync *volsync)
246{
247 struct yfs_xdr_YFSVolSync *x = (void *)*_bp;
248 u64 creation, update;
249
250 if (volsync) {
251 creation = xdr_to_u64(x->vol_creation_date);
252 do_div(creation, 10 * 1000 * 1000);
253 volsync->creation = creation;
254 update = xdr_to_u64(x->vol_update_date);
255 do_div(update, 10 * 1000 * 1000);
256 volsync->update = update;
257 }
258
259 *_bp += xdr_size(x);
260}
261
262/*
263 * Encode the requested attributes into a YFSStoreStatus block
264 */
265static __be32 *xdr_encode_YFS_StoreStatus(__be32 *bp, struct iattr *attr)
266{
267 struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
268 s64 mtime = 0, owner = 0, group = 0;
269 u32 mask = 0, mode = 0;
270
271 mask = 0;
272 if (attr->ia_valid & ATTR_MTIME) {
273 mask |= AFS_SET_MTIME;
274 mtime = linux_to_yfs_time(&attr->ia_mtime);
275 }
276
277 if (attr->ia_valid & ATTR_UID) {
278 mask |= AFS_SET_OWNER;
279 owner = from_kuid(&init_user_ns, attr->ia_uid);
280 }
281
282 if (attr->ia_valid & ATTR_GID) {
283 mask |= AFS_SET_GROUP;
284 group = from_kgid(&init_user_ns, attr->ia_gid);
285 }
286
287 if (attr->ia_valid & ATTR_MODE) {
288 mask |= AFS_SET_MODE;
289 mode = attr->ia_mode & S_IALLUGO;
290 }
291
292 x->mask = htonl(mask);
293 x->mode = htonl(mode);
294 x->mtime_client = u64_to_xdr(mtime);
295 x->owner = u64_to_xdr(owner);
296 x->group = u64_to_xdr(group);
297 return bp + xdr_size(x);
298}
299
300/*
301 * Decode a YFSFetchVolumeStatus block.
302 */
303static void xdr_decode_YFSFetchVolumeStatus(const __be32 **_bp,
304 struct afs_volume_status *vs)
305{
306 const struct yfs_xdr_YFSFetchVolumeStatus *x = (const void *)*_bp;
307 u32 flags;
308
309 vs->vid = xdr_to_u64(x->vid);
310 vs->parent_id = xdr_to_u64(x->parent_id);
311 flags = ntohl(x->flags);
312 vs->online = flags & yfs_FVSOnline;
313 vs->in_service = flags & yfs_FVSInservice;
314 vs->blessed = flags & yfs_FVSBlessed;
315 vs->needs_salvage = flags & yfs_FVSNeedsSalvage;
316 vs->type = ntohl(x->type);
317 vs->min_quota = 0;
318 vs->max_quota = xdr_to_u64(x->max_quota);
319 vs->blocks_in_use = xdr_to_u64(x->blocks_in_use);
320 vs->part_blocks_avail = xdr_to_u64(x->part_blocks_avail);
321 vs->part_max_blocks = xdr_to_u64(x->part_max_blocks);
322 vs->vol_copy_date = xdr_to_u64(x->vol_copy_date);
323 vs->vol_backup_date = xdr_to_u64(x->vol_backup_date);
324 *_bp += sizeof(*x) / sizeof(__be32);
325}
326
327/*
328 * Deliver reply data to operations that just return a file status and a volume
329 * sync record.
330 */
331static int yfs_deliver_status_and_volsync(struct afs_call *call)
332{
333 struct afs_operation *op = call->op;
334 const __be32 *bp;
335 int ret;
336
337 ret = afs_transfer_reply(call);
338 if (ret < 0)
339 return ret;
340
341 bp = call->buffer;
342 xdr_decode_YFSFetchStatus(&bp, call, &op->file[0].scb);
343 xdr_decode_YFSVolSync(&bp, &op->volsync);
344
345 _leave(" = 0 [done]");
346 return 0;
347}
348
349/*
350 * Deliver reply data to an YFS.FetchData64.
351 */
352static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
353{
354 struct afs_operation *op = call->op;
355 struct afs_vnode_param *vp = &op->file[0];
356 struct afs_read *req = op->fetch.req;
357 const __be32 *bp;
358 size_t count_before;
359 int ret;
360
361 _enter("{%u,%zu, %zu/%llu}",
362 call->unmarshall, call->iov_len, iov_iter_count(call->iter),
363 req->actual_len);
364
365 switch (call->unmarshall) {
366 case 0:
367 req->actual_len = 0;
368 afs_extract_to_tmp64(call);
369 call->unmarshall++;
370 fallthrough;
371
372 /* Extract the returned data length into ->actual_len. This
373 * may indicate more or less data than was requested will be
374 * returned.
375 */
376 case 1:
377 _debug("extract data length");
378 ret = afs_extract_data(call, true);
379 if (ret < 0)
380 return ret;
381
382 req->actual_len = be64_to_cpu(call->tmp64);
383 _debug("DATA length: %llu", req->actual_len);
384
385 if (req->actual_len == 0)
386 goto no_more_data;
387
388 call->iter = req->iter;
389 call->iov_len = min(req->actual_len, req->len);
390 call->unmarshall++;
391 fallthrough;
392
393 /* extract the returned data */
394 case 2:
395 count_before = call->iov_len;
396 _debug("extract data %zu/%llu", count_before, req->actual_len);
397
398 ret = afs_extract_data(call, true);
399 if (req->subreq) {
400 req->subreq->transferred += count_before - call->iov_len;
401 netfs_read_subreq_progress(req->subreq, false);
402 }
403 if (ret < 0)
404 return ret;
405
406 call->iter = &call->def_iter;
407 if (req->actual_len <= req->len)
408 goto no_more_data;
409
410 /* Discard any excess data the server gave us */
411 afs_extract_discard(call, req->actual_len - req->len);
412 call->unmarshall = 3;
413 fallthrough;
414
415 case 3:
416 _debug("extract discard %zu/%llu",
417 iov_iter_count(call->iter), req->actual_len - req->len);
418
419 ret = afs_extract_data(call, true);
420 if (ret < 0)
421 return ret;
422
423 no_more_data:
424 call->unmarshall = 4;
425 afs_extract_to_buf(call,
426 sizeof(struct yfs_xdr_YFSFetchStatus) +
427 sizeof(struct yfs_xdr_YFSCallBack) +
428 sizeof(struct yfs_xdr_YFSVolSync));
429 fallthrough;
430
431 /* extract the metadata */
432 case 4:
433 ret = afs_extract_data(call, false);
434 if (ret < 0)
435 return ret;
436
437 bp = call->buffer;
438 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
439 xdr_decode_YFSCallBack(&bp, call, &vp->scb);
440 xdr_decode_YFSVolSync(&bp, &op->volsync);
441
442 req->data_version = vp->scb.status.data_version;
443 req->file_size = vp->scb.status.size;
444
445 call->unmarshall++;
446 fallthrough;
447
448 case 5:
449 break;
450 }
451
452 _leave(" = 0 [done]");
453 return 0;
454}
455
456/*
457 * YFS.FetchData64 operation type
458 */
459static const struct afs_call_type yfs_RXYFSFetchData64 = {
460 .name = "YFS.FetchData64",
461 .op = yfs_FS_FetchData64,
462 .deliver = yfs_deliver_fs_fetch_data64,
463 .destructor = afs_flat_call_destructor,
464};
465
466/*
467 * Fetch data from a file.
468 */
469void yfs_fs_fetch_data(struct afs_operation *op)
470{
471 struct afs_vnode_param *vp = &op->file[0];
472 struct afs_read *req = op->fetch.req;
473 struct afs_call *call;
474 __be32 *bp;
475
476 _enter(",%x,{%llx:%llu},%llx,%llx",
477 key_serial(op->key), vp->fid.vid, vp->fid.vnode,
478 req->pos, req->len);
479
480 call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchData64,
481 sizeof(__be32) * 2 +
482 sizeof(struct yfs_xdr_YFSFid) +
483 sizeof(struct yfs_xdr_u64) * 2,
484 sizeof(struct yfs_xdr_YFSFetchStatus) +
485 sizeof(struct yfs_xdr_YFSCallBack) +
486 sizeof(struct yfs_xdr_YFSVolSync));
487 if (!call)
488 return afs_op_nomem(op);
489
490 req->call_debug_id = call->debug_id;
491
492 /* marshall the parameters */
493 bp = call->request;
494 bp = xdr_encode_u32(bp, YFSFETCHDATA64);
495 bp = xdr_encode_u32(bp, 0); /* RPC flags */
496 bp = xdr_encode_YFSFid(bp, &vp->fid);
497 bp = xdr_encode_u64(bp, req->pos);
498 bp = xdr_encode_u64(bp, req->len);
499 yfs_check_req(call, bp);
500
501 call->fid = vp->fid;
502 trace_afs_make_fs_call(call, &vp->fid);
503 afs_make_op_call(op, call, GFP_NOFS);
504}
505
506/*
507 * Deliver reply data for YFS.CreateFile or YFS.MakeDir.
508 */
509static int yfs_deliver_fs_create_vnode(struct afs_call *call)
510{
511 struct afs_operation *op = call->op;
512 struct afs_vnode_param *dvp = &op->file[0];
513 struct afs_vnode_param *vp = &op->file[1];
514 const __be32 *bp;
515 int ret;
516
517 _enter("{%u}", call->unmarshall);
518
519 ret = afs_transfer_reply(call);
520 if (ret < 0)
521 return ret;
522
523 /* unmarshall the reply once we've received all of it */
524 bp = call->buffer;
525 xdr_decode_YFSFid(&bp, &op->file[1].fid);
526 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
527 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
528 xdr_decode_YFSCallBack(&bp, call, &vp->scb);
529 xdr_decode_YFSVolSync(&bp, &op->volsync);
530
531 _leave(" = 0 [done]");
532 return 0;
533}
534
535/*
536 * FS.CreateFile and FS.MakeDir operation type
537 */
538static const struct afs_call_type afs_RXFSCreateFile = {
539 .name = "YFS.CreateFile",
540 .op = yfs_FS_CreateFile,
541 .deliver = yfs_deliver_fs_create_vnode,
542 .destructor = afs_flat_call_destructor,
543};
544
545/*
546 * Create a file.
547 */
548void yfs_fs_create_file(struct afs_operation *op)
549{
550 const struct qstr *name = &op->dentry->d_name;
551 struct afs_vnode_param *dvp = &op->file[0];
552 struct afs_call *call;
553 size_t reqsz, rplsz;
554 __be32 *bp;
555
556 _enter("");
557
558 reqsz = (sizeof(__be32) +
559 sizeof(__be32) +
560 sizeof(struct yfs_xdr_YFSFid) +
561 xdr_strlen(name->len) +
562 sizeof(struct yfs_xdr_YFSStoreStatus) +
563 sizeof(__be32));
564 rplsz = (sizeof(struct yfs_xdr_YFSFid) +
565 sizeof(struct yfs_xdr_YFSFetchStatus) +
566 sizeof(struct yfs_xdr_YFSFetchStatus) +
567 sizeof(struct yfs_xdr_YFSCallBack) +
568 sizeof(struct yfs_xdr_YFSVolSync));
569
570 call = afs_alloc_flat_call(op->net, &afs_RXFSCreateFile, reqsz, rplsz);
571 if (!call)
572 return afs_op_nomem(op);
573
574 /* marshall the parameters */
575 bp = call->request;
576 bp = xdr_encode_u32(bp, YFSCREATEFILE);
577 bp = xdr_encode_u32(bp, 0); /* RPC flags */
578 bp = xdr_encode_YFSFid(bp, &dvp->fid);
579 bp = xdr_encode_name(bp, name);
580 bp = xdr_encode_YFSStoreStatus(bp, &op->create.mode, &op->mtime);
581 bp = xdr_encode_u32(bp, yfs_LockNone); /* ViceLockType */
582 yfs_check_req(call, bp);
583
584 call->fid = dvp->fid;
585 trace_afs_make_fs_call1(call, &dvp->fid, name);
586 afs_make_op_call(op, call, GFP_NOFS);
587}
588
589static const struct afs_call_type yfs_RXFSMakeDir = {
590 .name = "YFS.MakeDir",
591 .op = yfs_FS_MakeDir,
592 .deliver = yfs_deliver_fs_create_vnode,
593 .destructor = afs_flat_call_destructor,
594};
595
596/*
597 * Make a directory.
598 */
599void yfs_fs_make_dir(struct afs_operation *op)
600{
601 const struct qstr *name = &op->dentry->d_name;
602 struct afs_vnode_param *dvp = &op->file[0];
603 struct afs_call *call;
604 size_t reqsz, rplsz;
605 __be32 *bp;
606
607 _enter("");
608
609 reqsz = (sizeof(__be32) +
610 sizeof(struct yfs_xdr_RPCFlags) +
611 sizeof(struct yfs_xdr_YFSFid) +
612 xdr_strlen(name->len) +
613 sizeof(struct yfs_xdr_YFSStoreStatus));
614 rplsz = (sizeof(struct yfs_xdr_YFSFid) +
615 sizeof(struct yfs_xdr_YFSFetchStatus) +
616 sizeof(struct yfs_xdr_YFSFetchStatus) +
617 sizeof(struct yfs_xdr_YFSCallBack) +
618 sizeof(struct yfs_xdr_YFSVolSync));
619
620 call = afs_alloc_flat_call(op->net, &yfs_RXFSMakeDir, reqsz, rplsz);
621 if (!call)
622 return afs_op_nomem(op);
623
624 /* marshall the parameters */
625 bp = call->request;
626 bp = xdr_encode_u32(bp, YFSMAKEDIR);
627 bp = xdr_encode_u32(bp, 0); /* RPC flags */
628 bp = xdr_encode_YFSFid(bp, &dvp->fid);
629 bp = xdr_encode_name(bp, name);
630 bp = xdr_encode_YFSStoreStatus(bp, &op->create.mode, &op->mtime);
631 yfs_check_req(call, bp);
632
633 call->fid = dvp->fid;
634 trace_afs_make_fs_call1(call, &dvp->fid, name);
635 afs_make_op_call(op, call, GFP_NOFS);
636}
637
638/*
639 * Deliver reply data to a YFS.RemoveFile2 operation.
640 */
641static int yfs_deliver_fs_remove_file2(struct afs_call *call)
642{
643 struct afs_operation *op = call->op;
644 struct afs_vnode_param *dvp = &op->file[0];
645 struct afs_vnode_param *vp = &op->file[1];
646 struct afs_fid fid;
647 const __be32 *bp;
648 int ret;
649
650 _enter("{%u}", call->unmarshall);
651
652 ret = afs_transfer_reply(call);
653 if (ret < 0)
654 return ret;
655
656 bp = call->buffer;
657 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
658 xdr_decode_YFSFid(&bp, &fid);
659 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
660 /* Was deleted if vnode->status.abort_code == VNOVNODE. */
661
662 xdr_decode_YFSVolSync(&bp, &op->volsync);
663 return 0;
664}
665
666static void yfs_done_fs_remove_file2(struct afs_call *call)
667{
668 if (call->error == -ECONNABORTED &&
669 (call->abort_code == RX_INVALID_OPERATION ||
670 call->abort_code == RXGEN_OPCODE)) {
671 set_bit(AFS_SERVER_FL_NO_RM2, &call->op->server->flags);
672 call->op->flags |= AFS_OPERATION_DOWNGRADE;
673 }
674}
675
676/*
677 * YFS.RemoveFile2 operation type.
678 */
679static const struct afs_call_type yfs_RXYFSRemoveFile2 = {
680 .name = "YFS.RemoveFile2",
681 .op = yfs_FS_RemoveFile2,
682 .deliver = yfs_deliver_fs_remove_file2,
683 .done = yfs_done_fs_remove_file2,
684 .destructor = afs_flat_call_destructor,
685};
686
687/*
688 * Remove a file and retrieve new file status.
689 */
690void yfs_fs_remove_file2(struct afs_operation *op)
691{
692 struct afs_vnode_param *dvp = &op->file[0];
693 const struct qstr *name = &op->dentry->d_name;
694 struct afs_call *call;
695 __be32 *bp;
696
697 _enter("");
698
699 call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveFile2,
700 sizeof(__be32) +
701 sizeof(struct yfs_xdr_RPCFlags) +
702 sizeof(struct yfs_xdr_YFSFid) +
703 xdr_strlen(name->len),
704 sizeof(struct yfs_xdr_YFSFetchStatus) +
705 sizeof(struct yfs_xdr_YFSFid) +
706 sizeof(struct yfs_xdr_YFSFetchStatus) +
707 sizeof(struct yfs_xdr_YFSVolSync));
708 if (!call)
709 return afs_op_nomem(op);
710
711 /* marshall the parameters */
712 bp = call->request;
713 bp = xdr_encode_u32(bp, YFSREMOVEFILE2);
714 bp = xdr_encode_u32(bp, 0); /* RPC flags */
715 bp = xdr_encode_YFSFid(bp, &dvp->fid);
716 bp = xdr_encode_name(bp, name);
717 yfs_check_req(call, bp);
718
719 call->fid = dvp->fid;
720 trace_afs_make_fs_call1(call, &dvp->fid, name);
721 afs_make_op_call(op, call, GFP_NOFS);
722}
723
724/*
725 * Deliver reply data to a YFS.RemoveFile or YFS.RemoveDir operation.
726 */
727static int yfs_deliver_fs_remove(struct afs_call *call)
728{
729 struct afs_operation *op = call->op;
730 struct afs_vnode_param *dvp = &op->file[0];
731 const __be32 *bp;
732 int ret;
733
734 _enter("{%u}", call->unmarshall);
735
736 ret = afs_transfer_reply(call);
737 if (ret < 0)
738 return ret;
739
740 bp = call->buffer;
741 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
742 xdr_decode_YFSVolSync(&bp, &op->volsync);
743 return 0;
744}
745
746/*
747 * FS.RemoveDir and FS.RemoveFile operation types.
748 */
749static const struct afs_call_type yfs_RXYFSRemoveFile = {
750 .name = "YFS.RemoveFile",
751 .op = yfs_FS_RemoveFile,
752 .deliver = yfs_deliver_fs_remove,
753 .destructor = afs_flat_call_destructor,
754};
755
756/*
757 * Remove a file.
758 */
759void yfs_fs_remove_file(struct afs_operation *op)
760{
761 const struct qstr *name = &op->dentry->d_name;
762 struct afs_vnode_param *dvp = &op->file[0];
763 struct afs_call *call;
764 __be32 *bp;
765
766 _enter("");
767
768 if (!test_bit(AFS_SERVER_FL_NO_RM2, &op->server->flags))
769 return yfs_fs_remove_file2(op);
770
771 call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveFile,
772 sizeof(__be32) +
773 sizeof(struct yfs_xdr_RPCFlags) +
774 sizeof(struct yfs_xdr_YFSFid) +
775 xdr_strlen(name->len),
776 sizeof(struct yfs_xdr_YFSFetchStatus) +
777 sizeof(struct yfs_xdr_YFSVolSync));
778 if (!call)
779 return afs_op_nomem(op);
780
781 /* marshall the parameters */
782 bp = call->request;
783 bp = xdr_encode_u32(bp, YFSREMOVEFILE);
784 bp = xdr_encode_u32(bp, 0); /* RPC flags */
785 bp = xdr_encode_YFSFid(bp, &dvp->fid);
786 bp = xdr_encode_name(bp, name);
787 yfs_check_req(call, bp);
788
789 call->fid = dvp->fid;
790 trace_afs_make_fs_call1(call, &dvp->fid, name);
791 afs_make_op_call(op, call, GFP_NOFS);
792}
793
794static const struct afs_call_type yfs_RXYFSRemoveDir = {
795 .name = "YFS.RemoveDir",
796 .op = yfs_FS_RemoveDir,
797 .deliver = yfs_deliver_fs_remove,
798 .destructor = afs_flat_call_destructor,
799};
800
801/*
802 * Remove a directory.
803 */
804void yfs_fs_remove_dir(struct afs_operation *op)
805{
806 const struct qstr *name = &op->dentry->d_name;
807 struct afs_vnode_param *dvp = &op->file[0];
808 struct afs_call *call;
809 __be32 *bp;
810
811 _enter("");
812
813 call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveDir,
814 sizeof(__be32) +
815 sizeof(struct yfs_xdr_RPCFlags) +
816 sizeof(struct yfs_xdr_YFSFid) +
817 xdr_strlen(name->len),
818 sizeof(struct yfs_xdr_YFSFetchStatus) +
819 sizeof(struct yfs_xdr_YFSVolSync));
820 if (!call)
821 return afs_op_nomem(op);
822
823 /* marshall the parameters */
824 bp = call->request;
825 bp = xdr_encode_u32(bp, YFSREMOVEDIR);
826 bp = xdr_encode_u32(bp, 0); /* RPC flags */
827 bp = xdr_encode_YFSFid(bp, &dvp->fid);
828 bp = xdr_encode_name(bp, name);
829 yfs_check_req(call, bp);
830
831 call->fid = dvp->fid;
832 trace_afs_make_fs_call1(call, &dvp->fid, name);
833 afs_make_op_call(op, call, GFP_NOFS);
834}
835
836/*
837 * Deliver reply data to a YFS.Link operation.
838 */
839static int yfs_deliver_fs_link(struct afs_call *call)
840{
841 struct afs_operation *op = call->op;
842 struct afs_vnode_param *dvp = &op->file[0];
843 struct afs_vnode_param *vp = &op->file[1];
844 const __be32 *bp;
845 int ret;
846
847 _enter("{%u}", call->unmarshall);
848
849 ret = afs_transfer_reply(call);
850 if (ret < 0)
851 return ret;
852
853 bp = call->buffer;
854 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
855 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
856 xdr_decode_YFSVolSync(&bp, &op->volsync);
857 _leave(" = 0 [done]");
858 return 0;
859}
860
861/*
862 * YFS.Link operation type.
863 */
864static const struct afs_call_type yfs_RXYFSLink = {
865 .name = "YFS.Link",
866 .op = yfs_FS_Link,
867 .deliver = yfs_deliver_fs_link,
868 .destructor = afs_flat_call_destructor,
869};
870
871/*
872 * Make a hard link.
873 */
874void yfs_fs_link(struct afs_operation *op)
875{
876 const struct qstr *name = &op->dentry->d_name;
877 struct afs_vnode_param *dvp = &op->file[0];
878 struct afs_vnode_param *vp = &op->file[1];
879 struct afs_call *call;
880 __be32 *bp;
881
882 _enter("");
883
884 call = afs_alloc_flat_call(op->net, &yfs_RXYFSLink,
885 sizeof(__be32) +
886 sizeof(struct yfs_xdr_RPCFlags) +
887 sizeof(struct yfs_xdr_YFSFid) +
888 xdr_strlen(name->len) +
889 sizeof(struct yfs_xdr_YFSFid),
890 sizeof(struct yfs_xdr_YFSFetchStatus) +
891 sizeof(struct yfs_xdr_YFSFetchStatus) +
892 sizeof(struct yfs_xdr_YFSVolSync));
893 if (!call)
894 return afs_op_nomem(op);
895
896 /* marshall the parameters */
897 bp = call->request;
898 bp = xdr_encode_u32(bp, YFSLINK);
899 bp = xdr_encode_u32(bp, 0); /* RPC flags */
900 bp = xdr_encode_YFSFid(bp, &dvp->fid);
901 bp = xdr_encode_name(bp, name);
902 bp = xdr_encode_YFSFid(bp, &vp->fid);
903 yfs_check_req(call, bp);
904
905 call->fid = vp->fid;
906 trace_afs_make_fs_call1(call, &vp->fid, name);
907 afs_make_op_call(op, call, GFP_NOFS);
908}
909
910/*
911 * Deliver reply data to a YFS.Symlink operation.
912 */
913static int yfs_deliver_fs_symlink(struct afs_call *call)
914{
915 struct afs_operation *op = call->op;
916 struct afs_vnode_param *dvp = &op->file[0];
917 struct afs_vnode_param *vp = &op->file[1];
918 const __be32 *bp;
919 int ret;
920
921 _enter("{%u}", call->unmarshall);
922
923 ret = afs_transfer_reply(call);
924 if (ret < 0)
925 return ret;
926
927 /* unmarshall the reply once we've received all of it */
928 bp = call->buffer;
929 xdr_decode_YFSFid(&bp, &vp->fid);
930 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
931 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
932 xdr_decode_YFSVolSync(&bp, &op->volsync);
933
934 _leave(" = 0 [done]");
935 return 0;
936}
937
938/*
939 * YFS.Symlink operation type
940 */
941static const struct afs_call_type yfs_RXYFSSymlink = {
942 .name = "YFS.Symlink",
943 .op = yfs_FS_Symlink,
944 .deliver = yfs_deliver_fs_symlink,
945 .destructor = afs_flat_call_destructor,
946};
947
948/*
949 * Create a symbolic link.
950 */
951void yfs_fs_symlink(struct afs_operation *op)
952{
953 const struct qstr *name = &op->dentry->d_name;
954 struct afs_vnode_param *dvp = &op->file[0];
955 struct afs_call *call;
956 size_t contents_sz;
957 mode_t mode = 0777;
958 __be32 *bp;
959
960 _enter("");
961
962 contents_sz = strlen(op->create.symlink);
963 call = afs_alloc_flat_call(op->net, &yfs_RXYFSSymlink,
964 sizeof(__be32) +
965 sizeof(struct yfs_xdr_RPCFlags) +
966 sizeof(struct yfs_xdr_YFSFid) +
967 xdr_strlen(name->len) +
968 xdr_strlen(contents_sz) +
969 sizeof(struct yfs_xdr_YFSStoreStatus),
970 sizeof(struct yfs_xdr_YFSFid) +
971 sizeof(struct yfs_xdr_YFSFetchStatus) +
972 sizeof(struct yfs_xdr_YFSFetchStatus) +
973 sizeof(struct yfs_xdr_YFSVolSync));
974 if (!call)
975 return afs_op_nomem(op);
976
977 /* marshall the parameters */
978 bp = call->request;
979 bp = xdr_encode_u32(bp, YFSSYMLINK);
980 bp = xdr_encode_u32(bp, 0); /* RPC flags */
981 bp = xdr_encode_YFSFid(bp, &dvp->fid);
982 bp = xdr_encode_name(bp, name);
983 bp = xdr_encode_string(bp, op->create.symlink, contents_sz);
984 bp = xdr_encode_YFSStoreStatus(bp, &mode, &op->mtime);
985 yfs_check_req(call, bp);
986
987 call->fid = dvp->fid;
988 trace_afs_make_fs_call1(call, &dvp->fid, name);
989 afs_make_op_call(op, call, GFP_NOFS);
990}
991
992/*
993 * Deliver reply data to a YFS.Rename operation.
994 */
995static int yfs_deliver_fs_rename(struct afs_call *call)
996{
997 struct afs_operation *op = call->op;
998 struct afs_vnode_param *orig_dvp = &op->file[0];
999 struct afs_vnode_param *new_dvp = &op->file[1];
1000 const __be32 *bp;
1001 int ret;
1002
1003 _enter("{%u}", call->unmarshall);
1004
1005 ret = afs_transfer_reply(call);
1006 if (ret < 0)
1007 return ret;
1008
1009 bp = call->buffer;
1010 /* If the two dirs are the same, we have two copies of the same status
1011 * report, so we just decode it twice.
1012 */
1013 xdr_decode_YFSFetchStatus(&bp, call, &orig_dvp->scb);
1014 xdr_decode_YFSFetchStatus(&bp, call, &new_dvp->scb);
1015 xdr_decode_YFSVolSync(&bp, &op->volsync);
1016 _leave(" = 0 [done]");
1017 return 0;
1018}
1019
1020/*
1021 * YFS.Rename operation type
1022 */
1023static const struct afs_call_type yfs_RXYFSRename = {
1024 .name = "FS.Rename",
1025 .op = yfs_FS_Rename,
1026 .deliver = yfs_deliver_fs_rename,
1027 .destructor = afs_flat_call_destructor,
1028};
1029
1030/*
1031 * Rename a file or directory.
1032 */
1033void yfs_fs_rename(struct afs_operation *op)
1034{
1035 struct afs_vnode_param *orig_dvp = &op->file[0];
1036 struct afs_vnode_param *new_dvp = &op->file[1];
1037 const struct qstr *orig_name = &op->dentry->d_name;
1038 const struct qstr *new_name = &op->dentry_2->d_name;
1039 struct afs_call *call;
1040 __be32 *bp;
1041
1042 _enter("");
1043
1044 call = afs_alloc_flat_call(op->net, &yfs_RXYFSRename,
1045 sizeof(__be32) +
1046 sizeof(struct yfs_xdr_RPCFlags) +
1047 sizeof(struct yfs_xdr_YFSFid) +
1048 xdr_strlen(orig_name->len) +
1049 sizeof(struct yfs_xdr_YFSFid) +
1050 xdr_strlen(new_name->len),
1051 sizeof(struct yfs_xdr_YFSFetchStatus) +
1052 sizeof(struct yfs_xdr_YFSFetchStatus) +
1053 sizeof(struct yfs_xdr_YFSVolSync));
1054 if (!call)
1055 return afs_op_nomem(op);
1056
1057 /* marshall the parameters */
1058 bp = call->request;
1059 bp = xdr_encode_u32(bp, YFSRENAME);
1060 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1061 bp = xdr_encode_YFSFid(bp, &orig_dvp->fid);
1062 bp = xdr_encode_name(bp, orig_name);
1063 bp = xdr_encode_YFSFid(bp, &new_dvp->fid);
1064 bp = xdr_encode_name(bp, new_name);
1065 yfs_check_req(call, bp);
1066
1067 call->fid = orig_dvp->fid;
1068 trace_afs_make_fs_call2(call, &orig_dvp->fid, orig_name, new_name);
1069 afs_make_op_call(op, call, GFP_NOFS);
1070}
1071
1072/*
1073 * YFS.StoreData64 operation type.
1074 */
1075static const struct afs_call_type yfs_RXYFSStoreData64 = {
1076 .name = "YFS.StoreData64",
1077 .op = yfs_FS_StoreData64,
1078 .deliver = yfs_deliver_status_and_volsync,
1079 .destructor = afs_flat_call_destructor,
1080};
1081
1082/*
1083 * Store a set of pages to a large file.
1084 */
1085void yfs_fs_store_data(struct afs_operation *op)
1086{
1087 struct afs_vnode_param *vp = &op->file[0];
1088 struct afs_call *call;
1089 __be32 *bp;
1090
1091 _enter(",%x,{%llx:%llu},,",
1092 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1093
1094 _debug("size %llx, at %llx, i_size %llx",
1095 (unsigned long long)op->store.size,
1096 (unsigned long long)op->store.pos,
1097 (unsigned long long)op->store.i_size);
1098
1099 call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreData64,
1100 sizeof(__be32) +
1101 sizeof(__be32) +
1102 sizeof(struct yfs_xdr_YFSFid) +
1103 sizeof(struct yfs_xdr_YFSStoreStatus) +
1104 sizeof(struct yfs_xdr_u64) * 3,
1105 sizeof(struct yfs_xdr_YFSFetchStatus) +
1106 sizeof(struct yfs_xdr_YFSVolSync));
1107 if (!call)
1108 return afs_op_nomem(op);
1109
1110 call->write_iter = op->store.write_iter;
1111
1112 /* marshall the parameters */
1113 bp = call->request;
1114 bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1115 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1116 bp = xdr_encode_YFSFid(bp, &vp->fid);
1117 bp = xdr_encode_YFSStoreStatus(bp, NULL, &op->mtime);
1118 bp = xdr_encode_u64(bp, op->store.pos);
1119 bp = xdr_encode_u64(bp, op->store.size);
1120 bp = xdr_encode_u64(bp, op->store.i_size);
1121 yfs_check_req(call, bp);
1122
1123 call->fid = vp->fid;
1124 trace_afs_make_fs_call(call, &vp->fid);
1125 afs_make_op_call(op, call, GFP_NOFS);
1126}
1127
1128/*
1129 * YFS.StoreStatus operation type
1130 */
1131static const struct afs_call_type yfs_RXYFSStoreStatus = {
1132 .name = "YFS.StoreStatus",
1133 .op = yfs_FS_StoreStatus,
1134 .deliver = yfs_deliver_status_and_volsync,
1135 .destructor = afs_flat_call_destructor,
1136};
1137
1138static const struct afs_call_type yfs_RXYFSStoreData64_as_Status = {
1139 .name = "YFS.StoreData64",
1140 .op = yfs_FS_StoreData64,
1141 .deliver = yfs_deliver_status_and_volsync,
1142 .destructor = afs_flat_call_destructor,
1143};
1144
1145/*
1146 * Set the attributes on a file, using YFS.StoreData64 rather than
1147 * YFS.StoreStatus so as to alter the file size also.
1148 */
1149static void yfs_fs_setattr_size(struct afs_operation *op)
1150{
1151 struct afs_vnode_param *vp = &op->file[0];
1152 struct afs_call *call;
1153 struct iattr *attr = op->setattr.attr;
1154 __be32 *bp;
1155
1156 _enter(",%x,{%llx:%llu},,",
1157 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1158
1159 call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreData64_as_Status,
1160 sizeof(__be32) * 2 +
1161 sizeof(struct yfs_xdr_YFSFid) +
1162 sizeof(struct yfs_xdr_YFSStoreStatus) +
1163 sizeof(struct yfs_xdr_u64) * 3,
1164 sizeof(struct yfs_xdr_YFSFetchStatus) +
1165 sizeof(struct yfs_xdr_YFSVolSync));
1166 if (!call)
1167 return afs_op_nomem(op);
1168
1169 /* marshall the parameters */
1170 bp = call->request;
1171 bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1172 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1173 bp = xdr_encode_YFSFid(bp, &vp->fid);
1174 bp = xdr_encode_YFS_StoreStatus(bp, attr);
1175 bp = xdr_encode_u64(bp, attr->ia_size); /* position of start of write */
1176 bp = xdr_encode_u64(bp, 0); /* size of write */
1177 bp = xdr_encode_u64(bp, attr->ia_size); /* new file length */
1178 yfs_check_req(call, bp);
1179
1180 call->fid = vp->fid;
1181 trace_afs_make_fs_call(call, &vp->fid);
1182 afs_make_op_call(op, call, GFP_NOFS);
1183}
1184
1185/*
1186 * Set the attributes on a file, using YFS.StoreData64 if there's a change in
1187 * file size, and YFS.StoreStatus otherwise.
1188 */
1189void yfs_fs_setattr(struct afs_operation *op)
1190{
1191 struct afs_vnode_param *vp = &op->file[0];
1192 struct afs_call *call;
1193 struct iattr *attr = op->setattr.attr;
1194 __be32 *bp;
1195
1196 if (attr->ia_valid & ATTR_SIZE)
1197 return yfs_fs_setattr_size(op);
1198
1199 _enter(",%x,{%llx:%llu},,",
1200 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1201
1202 call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreStatus,
1203 sizeof(__be32) * 2 +
1204 sizeof(struct yfs_xdr_YFSFid) +
1205 sizeof(struct yfs_xdr_YFSStoreStatus),
1206 sizeof(struct yfs_xdr_YFSFetchStatus) +
1207 sizeof(struct yfs_xdr_YFSVolSync));
1208 if (!call)
1209 return afs_op_nomem(op);
1210
1211 /* marshall the parameters */
1212 bp = call->request;
1213 bp = xdr_encode_u32(bp, YFSSTORESTATUS);
1214 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1215 bp = xdr_encode_YFSFid(bp, &vp->fid);
1216 bp = xdr_encode_YFS_StoreStatus(bp, attr);
1217 yfs_check_req(call, bp);
1218
1219 call->fid = vp->fid;
1220 trace_afs_make_fs_call(call, &vp->fid);
1221 afs_make_op_call(op, call, GFP_NOFS);
1222}
1223
1224/*
1225 * Deliver reply data to a YFS.GetVolumeStatus operation.
1226 */
1227static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
1228{
1229 struct afs_operation *op = call->op;
1230 const __be32 *bp;
1231 char *p;
1232 u32 size;
1233 int ret;
1234
1235 _enter("{%u}", call->unmarshall);
1236
1237 switch (call->unmarshall) {
1238 case 0:
1239 call->unmarshall++;
1240 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchVolumeStatus));
1241 fallthrough;
1242
1243 /* extract the returned status record */
1244 case 1:
1245 _debug("extract status");
1246 ret = afs_extract_data(call, true);
1247 if (ret < 0)
1248 return ret;
1249
1250 bp = call->buffer;
1251 xdr_decode_YFSFetchVolumeStatus(&bp, &op->volstatus.vs);
1252 call->unmarshall++;
1253 afs_extract_to_tmp(call);
1254 fallthrough;
1255
1256 /* extract the volume name length */
1257 case 2:
1258 ret = afs_extract_data(call, true);
1259 if (ret < 0)
1260 return ret;
1261
1262 call->count = ntohl(call->tmp);
1263 _debug("volname length: %u", call->count);
1264 if (call->count >= AFSNAMEMAX)
1265 return afs_protocol_error(call, afs_eproto_volname_len);
1266 size = (call->count + 3) & ~3; /* It's padded */
1267 afs_extract_to_buf(call, size);
1268 call->unmarshall++;
1269 fallthrough;
1270
1271 /* extract the volume name */
1272 case 3:
1273 _debug("extract volname");
1274 ret = afs_extract_data(call, true);
1275 if (ret < 0)
1276 return ret;
1277
1278 p = call->buffer;
1279 p[call->count] = 0;
1280 _debug("volname '%s'", p);
1281 afs_extract_to_tmp(call);
1282 call->unmarshall++;
1283 fallthrough;
1284
1285 /* extract the offline message length */
1286 case 4:
1287 ret = afs_extract_data(call, true);
1288 if (ret < 0)
1289 return ret;
1290
1291 call->count = ntohl(call->tmp);
1292 _debug("offline msg length: %u", call->count);
1293 if (call->count >= AFSNAMEMAX)
1294 return afs_protocol_error(call, afs_eproto_offline_msg_len);
1295 size = (call->count + 3) & ~3; /* It's padded */
1296 afs_extract_to_buf(call, size);
1297 call->unmarshall++;
1298 fallthrough;
1299
1300 /* extract the offline message */
1301 case 5:
1302 _debug("extract offline");
1303 ret = afs_extract_data(call, true);
1304 if (ret < 0)
1305 return ret;
1306
1307 p = call->buffer;
1308 p[call->count] = 0;
1309 _debug("offline '%s'", p);
1310
1311 afs_extract_to_tmp(call);
1312 call->unmarshall++;
1313 fallthrough;
1314
1315 /* extract the message of the day length */
1316 case 6:
1317 ret = afs_extract_data(call, true);
1318 if (ret < 0)
1319 return ret;
1320
1321 call->count = ntohl(call->tmp);
1322 _debug("motd length: %u", call->count);
1323 if (call->count >= AFSNAMEMAX)
1324 return afs_protocol_error(call, afs_eproto_motd_len);
1325 size = (call->count + 3) & ~3; /* It's padded */
1326 afs_extract_to_buf(call, size);
1327 call->unmarshall++;
1328 fallthrough;
1329
1330 /* extract the message of the day */
1331 case 7:
1332 _debug("extract motd");
1333 ret = afs_extract_data(call, false);
1334 if (ret < 0)
1335 return ret;
1336
1337 p = call->buffer;
1338 p[call->count] = 0;
1339 _debug("motd '%s'", p);
1340
1341 call->unmarshall++;
1342 fallthrough;
1343
1344 case 8:
1345 break;
1346 }
1347
1348 _leave(" = 0 [done]");
1349 return 0;
1350}
1351
1352/*
1353 * YFS.GetVolumeStatus operation type
1354 */
1355static const struct afs_call_type yfs_RXYFSGetVolumeStatus = {
1356 .name = "YFS.GetVolumeStatus",
1357 .op = yfs_FS_GetVolumeStatus,
1358 .deliver = yfs_deliver_fs_get_volume_status,
1359 .destructor = afs_flat_call_destructor,
1360};
1361
1362/*
1363 * fetch the status of a volume
1364 */
1365void yfs_fs_get_volume_status(struct afs_operation *op)
1366{
1367 struct afs_vnode_param *vp = &op->file[0];
1368 struct afs_call *call;
1369 __be32 *bp;
1370
1371 _enter("");
1372
1373 call = afs_alloc_flat_call(op->net, &yfs_RXYFSGetVolumeStatus,
1374 sizeof(__be32) * 2 +
1375 sizeof(struct yfs_xdr_u64),
1376 max_t(size_t,
1377 sizeof(struct yfs_xdr_YFSFetchVolumeStatus) +
1378 sizeof(__be32),
1379 AFSOPAQUEMAX + 1));
1380 if (!call)
1381 return afs_op_nomem(op);
1382
1383 /* marshall the parameters */
1384 bp = call->request;
1385 bp = xdr_encode_u32(bp, YFSGETVOLUMESTATUS);
1386 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1387 bp = xdr_encode_u64(bp, vp->fid.vid);
1388 yfs_check_req(call, bp);
1389
1390 call->fid = vp->fid;
1391 trace_afs_make_fs_call(call, &vp->fid);
1392 afs_make_op_call(op, call, GFP_NOFS);
1393}
1394
1395/*
1396 * YFS.SetLock operation type
1397 */
1398static const struct afs_call_type yfs_RXYFSSetLock = {
1399 .name = "YFS.SetLock",
1400 .op = yfs_FS_SetLock,
1401 .deliver = yfs_deliver_status_and_volsync,
1402 .done = afs_lock_op_done,
1403 .destructor = afs_flat_call_destructor,
1404};
1405
1406/*
1407 * YFS.ExtendLock operation type
1408 */
1409static const struct afs_call_type yfs_RXYFSExtendLock = {
1410 .name = "YFS.ExtendLock",
1411 .op = yfs_FS_ExtendLock,
1412 .deliver = yfs_deliver_status_and_volsync,
1413 .done = afs_lock_op_done,
1414 .destructor = afs_flat_call_destructor,
1415};
1416
1417/*
1418 * YFS.ReleaseLock operation type
1419 */
1420static const struct afs_call_type yfs_RXYFSReleaseLock = {
1421 .name = "YFS.ReleaseLock",
1422 .op = yfs_FS_ReleaseLock,
1423 .deliver = yfs_deliver_status_and_volsync,
1424 .destructor = afs_flat_call_destructor,
1425};
1426
1427/*
1428 * Set a lock on a file
1429 */
1430void yfs_fs_set_lock(struct afs_operation *op)
1431{
1432 struct afs_vnode_param *vp = &op->file[0];
1433 struct afs_call *call;
1434 __be32 *bp;
1435
1436 _enter("");
1437
1438 call = afs_alloc_flat_call(op->net, &yfs_RXYFSSetLock,
1439 sizeof(__be32) * 2 +
1440 sizeof(struct yfs_xdr_YFSFid) +
1441 sizeof(__be32),
1442 sizeof(struct yfs_xdr_YFSFetchStatus) +
1443 sizeof(struct yfs_xdr_YFSVolSync));
1444 if (!call)
1445 return afs_op_nomem(op);
1446
1447 /* marshall the parameters */
1448 bp = call->request;
1449 bp = xdr_encode_u32(bp, YFSSETLOCK);
1450 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1451 bp = xdr_encode_YFSFid(bp, &vp->fid);
1452 bp = xdr_encode_u32(bp, op->lock.type);
1453 yfs_check_req(call, bp);
1454
1455 call->fid = vp->fid;
1456 trace_afs_make_fs_calli(call, &vp->fid, op->lock.type);
1457 afs_make_op_call(op, call, GFP_NOFS);
1458}
1459
1460/*
1461 * extend a lock on a file
1462 */
1463void yfs_fs_extend_lock(struct afs_operation *op)
1464{
1465 struct afs_vnode_param *vp = &op->file[0];
1466 struct afs_call *call;
1467 __be32 *bp;
1468
1469 _enter("");
1470
1471 call = afs_alloc_flat_call(op->net, &yfs_RXYFSExtendLock,
1472 sizeof(__be32) * 2 +
1473 sizeof(struct yfs_xdr_YFSFid),
1474 sizeof(struct yfs_xdr_YFSFetchStatus) +
1475 sizeof(struct yfs_xdr_YFSVolSync));
1476 if (!call)
1477 return afs_op_nomem(op);
1478
1479 /* marshall the parameters */
1480 bp = call->request;
1481 bp = xdr_encode_u32(bp, YFSEXTENDLOCK);
1482 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1483 bp = xdr_encode_YFSFid(bp, &vp->fid);
1484 yfs_check_req(call, bp);
1485
1486 call->fid = vp->fid;
1487 trace_afs_make_fs_call(call, &vp->fid);
1488 afs_make_op_call(op, call, GFP_NOFS);
1489}
1490
1491/*
1492 * release a lock on a file
1493 */
1494void yfs_fs_release_lock(struct afs_operation *op)
1495{
1496 struct afs_vnode_param *vp = &op->file[0];
1497 struct afs_call *call;
1498 __be32 *bp;
1499
1500 _enter("");
1501
1502 call = afs_alloc_flat_call(op->net, &yfs_RXYFSReleaseLock,
1503 sizeof(__be32) * 2 +
1504 sizeof(struct yfs_xdr_YFSFid),
1505 sizeof(struct yfs_xdr_YFSFetchStatus) +
1506 sizeof(struct yfs_xdr_YFSVolSync));
1507 if (!call)
1508 return afs_op_nomem(op);
1509
1510 /* marshall the parameters */
1511 bp = call->request;
1512 bp = xdr_encode_u32(bp, YFSRELEASELOCK);
1513 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1514 bp = xdr_encode_YFSFid(bp, &vp->fid);
1515 yfs_check_req(call, bp);
1516
1517 call->fid = vp->fid;
1518 trace_afs_make_fs_call(call, &vp->fid);
1519 afs_make_op_call(op, call, GFP_NOFS);
1520}
1521
1522/*
1523 * Deliver a reply to YFS.FetchStatus
1524 */
1525static int yfs_deliver_fs_fetch_status(struct afs_call *call)
1526{
1527 struct afs_operation *op = call->op;
1528 struct afs_vnode_param *vp = &op->file[op->fetch_status.which];
1529 const __be32 *bp;
1530 int ret;
1531
1532 ret = afs_transfer_reply(call);
1533 if (ret < 0)
1534 return ret;
1535
1536 /* unmarshall the reply once we've received all of it */
1537 bp = call->buffer;
1538 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
1539 xdr_decode_YFSCallBack(&bp, call, &vp->scb);
1540 xdr_decode_YFSVolSync(&bp, &op->volsync);
1541
1542 _leave(" = 0 [done]");
1543 return 0;
1544}
1545
1546/*
1547 * YFS.FetchStatus operation type
1548 */
1549static const struct afs_call_type yfs_RXYFSFetchStatus = {
1550 .name = "YFS.FetchStatus",
1551 .op = yfs_FS_FetchStatus,
1552 .deliver = yfs_deliver_fs_fetch_status,
1553 .destructor = afs_flat_call_destructor,
1554};
1555
1556/*
1557 * Fetch the status information for a fid without needing a vnode handle.
1558 */
1559void yfs_fs_fetch_status(struct afs_operation *op)
1560{
1561 struct afs_vnode_param *vp = &op->file[op->fetch_status.which];
1562 struct afs_call *call;
1563 __be32 *bp;
1564
1565 _enter(",%x,{%llx:%llu},,",
1566 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1567
1568 call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchStatus,
1569 sizeof(__be32) * 2 +
1570 sizeof(struct yfs_xdr_YFSFid),
1571 sizeof(struct yfs_xdr_YFSFetchStatus) +
1572 sizeof(struct yfs_xdr_YFSCallBack) +
1573 sizeof(struct yfs_xdr_YFSVolSync));
1574 if (!call)
1575 return afs_op_nomem(op);
1576
1577 /* marshall the parameters */
1578 bp = call->request;
1579 bp = xdr_encode_u32(bp, YFSFETCHSTATUS);
1580 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1581 bp = xdr_encode_YFSFid(bp, &vp->fid);
1582 yfs_check_req(call, bp);
1583
1584 call->fid = vp->fid;
1585 trace_afs_make_fs_call(call, &vp->fid);
1586 afs_make_op_call(op, call, GFP_NOFS);
1587}
1588
1589/*
1590 * Deliver reply data to an YFS.InlineBulkStatus call
1591 */
1592static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
1593{
1594 struct afs_operation *op = call->op;
1595 struct afs_status_cb *scb;
1596 const __be32 *bp;
1597 u32 tmp;
1598 int ret;
1599
1600 _enter("{%u}", call->unmarshall);
1601
1602 switch (call->unmarshall) {
1603 case 0:
1604 afs_extract_to_tmp(call);
1605 call->unmarshall++;
1606 fallthrough;
1607
1608 /* Extract the file status count and array in two steps */
1609 case 1:
1610 _debug("extract status count");
1611 ret = afs_extract_data(call, true);
1612 if (ret < 0)
1613 return ret;
1614
1615 tmp = ntohl(call->tmp);
1616 _debug("status count: %u/%u", tmp, op->nr_files);
1617 if (tmp != op->nr_files)
1618 return afs_protocol_error(call, afs_eproto_ibulkst_count);
1619
1620 call->count = 0;
1621 call->unmarshall++;
1622 more_counts:
1623 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchStatus));
1624 fallthrough;
1625
1626 case 2:
1627 _debug("extract status array %u", call->count);
1628 ret = afs_extract_data(call, true);
1629 if (ret < 0)
1630 return ret;
1631
1632 switch (call->count) {
1633 case 0:
1634 scb = &op->file[0].scb;
1635 break;
1636 case 1:
1637 scb = &op->file[1].scb;
1638 break;
1639 default:
1640 scb = &op->more_files[call->count - 2].scb;
1641 break;
1642 }
1643
1644 bp = call->buffer;
1645 xdr_decode_YFSFetchStatus(&bp, call, scb);
1646
1647 call->count++;
1648 if (call->count < op->nr_files)
1649 goto more_counts;
1650
1651 call->count = 0;
1652 call->unmarshall++;
1653 afs_extract_to_tmp(call);
1654 fallthrough;
1655
1656 /* Extract the callback count and array in two steps */
1657 case 3:
1658 _debug("extract CB count");
1659 ret = afs_extract_data(call, true);
1660 if (ret < 0)
1661 return ret;
1662
1663 tmp = ntohl(call->tmp);
1664 _debug("CB count: %u", tmp);
1665 if (tmp != op->nr_files)
1666 return afs_protocol_error(call, afs_eproto_ibulkst_cb_count);
1667 call->count = 0;
1668 call->unmarshall++;
1669 more_cbs:
1670 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSCallBack));
1671 fallthrough;
1672
1673 case 4:
1674 _debug("extract CB array");
1675 ret = afs_extract_data(call, true);
1676 if (ret < 0)
1677 return ret;
1678
1679 _debug("unmarshall CB array");
1680 switch (call->count) {
1681 case 0:
1682 scb = &op->file[0].scb;
1683 break;
1684 case 1:
1685 scb = &op->file[1].scb;
1686 break;
1687 default:
1688 scb = &op->more_files[call->count - 2].scb;
1689 break;
1690 }
1691
1692 bp = call->buffer;
1693 xdr_decode_YFSCallBack(&bp, call, scb);
1694 call->count++;
1695 if (call->count < op->nr_files)
1696 goto more_cbs;
1697
1698 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSVolSync));
1699 call->unmarshall++;
1700 fallthrough;
1701
1702 case 5:
1703 ret = afs_extract_data(call, false);
1704 if (ret < 0)
1705 return ret;
1706
1707 bp = call->buffer;
1708 xdr_decode_YFSVolSync(&bp, &op->volsync);
1709
1710 call->unmarshall++;
1711 fallthrough;
1712
1713 case 6:
1714 break;
1715 }
1716
1717 _leave(" = 0 [done]");
1718 return 0;
1719}
1720
1721/*
1722 * FS.InlineBulkStatus operation type
1723 */
1724static const struct afs_call_type yfs_RXYFSInlineBulkStatus = {
1725 .name = "YFS.InlineBulkStatus",
1726 .op = yfs_FS_InlineBulkStatus,
1727 .deliver = yfs_deliver_fs_inline_bulk_status,
1728 .destructor = afs_flat_call_destructor,
1729};
1730
1731/*
1732 * Fetch the status information for up to 1024 files
1733 */
1734void yfs_fs_inline_bulk_status(struct afs_operation *op)
1735{
1736 struct afs_vnode_param *dvp = &op->file[0];
1737 struct afs_vnode_param *vp = &op->file[1];
1738 struct afs_call *call;
1739 __be32 *bp;
1740 int i;
1741
1742 _enter(",%x,{%llx:%llu},%u",
1743 key_serial(op->key), vp->fid.vid, vp->fid.vnode, op->nr_files);
1744
1745 call = afs_alloc_flat_call(op->net, &yfs_RXYFSInlineBulkStatus,
1746 sizeof(__be32) +
1747 sizeof(__be32) +
1748 sizeof(__be32) +
1749 sizeof(struct yfs_xdr_YFSFid) * op->nr_files,
1750 sizeof(struct yfs_xdr_YFSFetchStatus));
1751 if (!call)
1752 return afs_op_nomem(op);
1753
1754 /* marshall the parameters */
1755 bp = call->request;
1756 bp = xdr_encode_u32(bp, YFSINLINEBULKSTATUS);
1757 bp = xdr_encode_u32(bp, 0); /* RPCFlags */
1758 bp = xdr_encode_u32(bp, op->nr_files);
1759 bp = xdr_encode_YFSFid(bp, &dvp->fid);
1760 bp = xdr_encode_YFSFid(bp, &vp->fid);
1761 for (i = 0; i < op->nr_files - 2; i++)
1762 bp = xdr_encode_YFSFid(bp, &op->more_files[i].fid);
1763 yfs_check_req(call, bp);
1764
1765 call->fid = vp->fid;
1766 trace_afs_make_fs_call(call, &vp->fid);
1767 afs_make_op_call(op, call, GFP_NOFS);
1768}
1769
1770/*
1771 * Deliver reply data to an YFS.FetchOpaqueACL.
1772 */
1773static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call)
1774{
1775 struct afs_operation *op = call->op;
1776 struct afs_vnode_param *vp = &op->file[0];
1777 struct yfs_acl *yacl = op->yacl;
1778 struct afs_acl *acl;
1779 const __be32 *bp;
1780 unsigned int size;
1781 int ret;
1782
1783 _enter("{%u}", call->unmarshall);
1784
1785 switch (call->unmarshall) {
1786 case 0:
1787 afs_extract_to_tmp(call);
1788 call->unmarshall++;
1789 fallthrough;
1790
1791 /* Extract the file ACL length */
1792 case 1:
1793 ret = afs_extract_data(call, true);
1794 if (ret < 0)
1795 return ret;
1796
1797 size = call->count2 = ntohl(call->tmp);
1798 size = round_up(size, 4);
1799
1800 if (yacl->flags & YFS_ACL_WANT_ACL) {
1801 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
1802 if (!acl)
1803 return -ENOMEM;
1804 yacl->acl = acl;
1805 acl->size = call->count2;
1806 afs_extract_begin(call, acl->data, size);
1807 } else {
1808 afs_extract_discard(call, size);
1809 }
1810 call->unmarshall++;
1811 fallthrough;
1812
1813 /* Extract the file ACL */
1814 case 2:
1815 ret = afs_extract_data(call, true);
1816 if (ret < 0)
1817 return ret;
1818
1819 afs_extract_to_tmp(call);
1820 call->unmarshall++;
1821 fallthrough;
1822
1823 /* Extract the volume ACL length */
1824 case 3:
1825 ret = afs_extract_data(call, true);
1826 if (ret < 0)
1827 return ret;
1828
1829 size = call->count2 = ntohl(call->tmp);
1830 size = round_up(size, 4);
1831
1832 if (yacl->flags & YFS_ACL_WANT_VOL_ACL) {
1833 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
1834 if (!acl)
1835 return -ENOMEM;
1836 yacl->vol_acl = acl;
1837 acl->size = call->count2;
1838 afs_extract_begin(call, acl->data, size);
1839 } else {
1840 afs_extract_discard(call, size);
1841 }
1842 call->unmarshall++;
1843 fallthrough;
1844
1845 /* Extract the volume ACL */
1846 case 4:
1847 ret = afs_extract_data(call, true);
1848 if (ret < 0)
1849 return ret;
1850
1851 afs_extract_to_buf(call,
1852 sizeof(__be32) * 2 +
1853 sizeof(struct yfs_xdr_YFSFetchStatus) +
1854 sizeof(struct yfs_xdr_YFSVolSync));
1855 call->unmarshall++;
1856 fallthrough;
1857
1858 /* extract the metadata */
1859 case 5:
1860 ret = afs_extract_data(call, false);
1861 if (ret < 0)
1862 return ret;
1863
1864 bp = call->buffer;
1865 yacl->inherit_flag = ntohl(*bp++);
1866 yacl->num_cleaned = ntohl(*bp++);
1867 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
1868 xdr_decode_YFSVolSync(&bp, &op->volsync);
1869
1870 call->unmarshall++;
1871 fallthrough;
1872
1873 case 6:
1874 break;
1875 }
1876
1877 _leave(" = 0 [done]");
1878 return 0;
1879}
1880
1881void yfs_free_opaque_acl(struct yfs_acl *yacl)
1882{
1883 if (yacl) {
1884 kfree(yacl->acl);
1885 kfree(yacl->vol_acl);
1886 kfree(yacl);
1887 }
1888}
1889
1890/*
1891 * YFS.FetchOpaqueACL operation type
1892 */
1893static const struct afs_call_type yfs_RXYFSFetchOpaqueACL = {
1894 .name = "YFS.FetchOpaqueACL",
1895 .op = yfs_FS_FetchOpaqueACL,
1896 .deliver = yfs_deliver_fs_fetch_opaque_acl,
1897 .destructor = afs_flat_call_destructor,
1898};
1899
1900/*
1901 * Fetch the YFS advanced ACLs for a file.
1902 */
1903void yfs_fs_fetch_opaque_acl(struct afs_operation *op)
1904{
1905 struct afs_vnode_param *vp = &op->file[0];
1906 struct afs_call *call;
1907 __be32 *bp;
1908
1909 _enter(",%x,{%llx:%llu},,",
1910 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1911
1912 call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchOpaqueACL,
1913 sizeof(__be32) * 2 +
1914 sizeof(struct yfs_xdr_YFSFid),
1915 sizeof(__be32) * 2 +
1916 sizeof(struct yfs_xdr_YFSFetchStatus) +
1917 sizeof(struct yfs_xdr_YFSVolSync));
1918 if (!call)
1919 return afs_op_nomem(op);
1920
1921 /* marshall the parameters */
1922 bp = call->request;
1923 bp = xdr_encode_u32(bp, YFSFETCHOPAQUEACL);
1924 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1925 bp = xdr_encode_YFSFid(bp, &vp->fid);
1926 yfs_check_req(call, bp);
1927
1928 call->fid = vp->fid;
1929 trace_afs_make_fs_call(call, &vp->fid);
1930 afs_make_op_call(op, call, GFP_KERNEL);
1931}
1932
1933/*
1934 * YFS.StoreOpaqueACL2 operation type
1935 */
1936static const struct afs_call_type yfs_RXYFSStoreOpaqueACL2 = {
1937 .name = "YFS.StoreOpaqueACL2",
1938 .op = yfs_FS_StoreOpaqueACL2,
1939 .deliver = yfs_deliver_status_and_volsync,
1940 .destructor = afs_flat_call_destructor,
1941};
1942
1943/*
1944 * Fetch the YFS ACL for a file.
1945 */
1946void yfs_fs_store_opaque_acl2(struct afs_operation *op)
1947{
1948 struct afs_vnode_param *vp = &op->file[0];
1949 struct afs_call *call;
1950 struct afs_acl *acl = op->acl;
1951 size_t size;
1952 __be32 *bp;
1953
1954 _enter(",%x,{%llx:%llu},,",
1955 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1956
1957 size = round_up(acl->size, 4);
1958 call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreOpaqueACL2,
1959 sizeof(__be32) * 2 +
1960 sizeof(struct yfs_xdr_YFSFid) +
1961 sizeof(__be32) + size,
1962 sizeof(struct yfs_xdr_YFSFetchStatus) +
1963 sizeof(struct yfs_xdr_YFSVolSync));
1964 if (!call)
1965 return afs_op_nomem(op);
1966
1967 /* marshall the parameters */
1968 bp = call->request;
1969 bp = xdr_encode_u32(bp, YFSSTOREOPAQUEACL2);
1970 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1971 bp = xdr_encode_YFSFid(bp, &vp->fid);
1972 bp = xdr_encode_u32(bp, acl->size);
1973 memcpy(bp, acl->data, acl->size);
1974 if (acl->size != size)
1975 memset((void *)bp + acl->size, 0, size - acl->size);
1976 bp += size / sizeof(__be32);
1977 yfs_check_req(call, bp);
1978
1979 call->fid = vp->fid;
1980 trace_afs_make_fs_call(call, &vp->fid);
1981 afs_make_op_call(op, call, GFP_KERNEL);
1982}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/* YFS File Server client stubs
3 *
4 * Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
6 */
7
8#include <linux/init.h>
9#include <linux/slab.h>
10#include <linux/sched.h>
11#include <linux/circ_buf.h>
12#include <linux/iversion.h>
13#include "internal.h"
14#include "afs_fs.h"
15#include "xdr_fs.h"
16#include "protocol_yfs.h"
17
18#define xdr_size(x) (sizeof(*x) / sizeof(__be32))
19
20static void xdr_decode_YFSFid(const __be32 **_bp, struct afs_fid *fid)
21{
22 const struct yfs_xdr_YFSFid *x = (const void *)*_bp;
23
24 fid->vid = xdr_to_u64(x->volume);
25 fid->vnode = xdr_to_u64(x->vnode.lo);
26 fid->vnode_hi = ntohl(x->vnode.hi);
27 fid->unique = ntohl(x->vnode.unique);
28 *_bp += xdr_size(x);
29}
30
31static __be32 *xdr_encode_u32(__be32 *bp, u32 n)
32{
33 *bp++ = htonl(n);
34 return bp;
35}
36
37static __be32 *xdr_encode_u64(__be32 *bp, u64 n)
38{
39 struct yfs_xdr_u64 *x = (void *)bp;
40
41 *x = u64_to_xdr(n);
42 return bp + xdr_size(x);
43}
44
45static __be32 *xdr_encode_YFSFid(__be32 *bp, struct afs_fid *fid)
46{
47 struct yfs_xdr_YFSFid *x = (void *)bp;
48
49 x->volume = u64_to_xdr(fid->vid);
50 x->vnode.lo = u64_to_xdr(fid->vnode);
51 x->vnode.hi = htonl(fid->vnode_hi);
52 x->vnode.unique = htonl(fid->unique);
53 return bp + xdr_size(x);
54}
55
56static size_t xdr_strlen(unsigned int len)
57{
58 return sizeof(__be32) + round_up(len, sizeof(__be32));
59}
60
61static __be32 *xdr_encode_string(__be32 *bp, const char *p, unsigned int len)
62{
63 bp = xdr_encode_u32(bp, len);
64 bp = memcpy(bp, p, len);
65 if (len & 3) {
66 unsigned int pad = 4 - (len & 3);
67
68 memset((u8 *)bp + len, 0, pad);
69 len += pad;
70 }
71
72 return bp + len / sizeof(__be32);
73}
74
75static __be32 *xdr_encode_name(__be32 *bp, const struct qstr *p)
76{
77 return xdr_encode_string(bp, p->name, p->len);
78}
79
80static s64 linux_to_yfs_time(const struct timespec64 *t)
81{
82 /* Convert to 100ns intervals. */
83 return (u64)t->tv_sec * 10000000 + t->tv_nsec/100;
84}
85
86static __be32 *xdr_encode_YFSStoreStatus_mode(__be32 *bp, mode_t mode)
87{
88 struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
89
90 x->mask = htonl(AFS_SET_MODE);
91 x->mode = htonl(mode & S_IALLUGO);
92 x->mtime_client = u64_to_xdr(0);
93 x->owner = u64_to_xdr(0);
94 x->group = u64_to_xdr(0);
95 return bp + xdr_size(x);
96}
97
98static __be32 *xdr_encode_YFSStoreStatus_mtime(__be32 *bp, const struct timespec64 *t)
99{
100 struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
101 s64 mtime = linux_to_yfs_time(t);
102
103 x->mask = htonl(AFS_SET_MTIME);
104 x->mode = htonl(0);
105 x->mtime_client = u64_to_xdr(mtime);
106 x->owner = u64_to_xdr(0);
107 x->group = u64_to_xdr(0);
108 return bp + xdr_size(x);
109}
110
111/*
112 * Convert a signed 100ns-resolution 64-bit time into a timespec.
113 */
114static struct timespec64 yfs_time_to_linux(s64 t)
115{
116 struct timespec64 ts;
117 u64 abs_t;
118
119 /*
120 * Unfortunately can not use normal 64 bit division on 32 bit arch, but
121 * the alternative, do_div, does not work with negative numbers so have
122 * to special case them
123 */
124 if (t < 0) {
125 abs_t = -t;
126 ts.tv_nsec = (time64_t)(do_div(abs_t, 10000000) * 100);
127 ts.tv_nsec = -ts.tv_nsec;
128 ts.tv_sec = -abs_t;
129 } else {
130 abs_t = t;
131 ts.tv_nsec = (time64_t)do_div(abs_t, 10000000) * 100;
132 ts.tv_sec = abs_t;
133 }
134
135 return ts;
136}
137
138static struct timespec64 xdr_to_time(const struct yfs_xdr_u64 xdr)
139{
140 s64 t = xdr_to_u64(xdr);
141
142 return yfs_time_to_linux(t);
143}
144
145static void yfs_check_req(struct afs_call *call, __be32 *bp)
146{
147 size_t len = (void *)bp - call->request;
148
149 if (len > call->request_size)
150 pr_err("kAFS: %s: Request buffer overflow (%zu>%u)\n",
151 call->type->name, len, call->request_size);
152 else if (len < call->request_size)
153 pr_warn("kAFS: %s: Request buffer underflow (%zu<%u)\n",
154 call->type->name, len, call->request_size);
155}
156
157/*
158 * Dump a bad file status record.
159 */
160static void xdr_dump_bad(const __be32 *bp)
161{
162 __be32 x[4];
163 int i;
164
165 pr_notice("YFS XDR: Bad status record\n");
166 for (i = 0; i < 6 * 4 * 4; i += 16) {
167 memcpy(x, bp, 16);
168 bp += 4;
169 pr_notice("%03x: %08x %08x %08x %08x\n",
170 i, ntohl(x[0]), ntohl(x[1]), ntohl(x[2]), ntohl(x[3]));
171 }
172
173 memcpy(x, bp, 8);
174 pr_notice("0x60: %08x %08x\n", ntohl(x[0]), ntohl(x[1]));
175}
176
177/*
178 * Decode a YFSFetchStatus block
179 */
180static void xdr_decode_YFSFetchStatus(const __be32 **_bp,
181 struct afs_call *call,
182 struct afs_status_cb *scb)
183{
184 const struct yfs_xdr_YFSFetchStatus *xdr = (const void *)*_bp;
185 struct afs_file_status *status = &scb->status;
186 u32 type;
187
188 status->abort_code = ntohl(xdr->abort_code);
189 if (status->abort_code != 0) {
190 if (status->abort_code == VNOVNODE)
191 status->nlink = 0;
192 scb->have_error = true;
193 goto advance;
194 }
195
196 type = ntohl(xdr->type);
197 switch (type) {
198 case AFS_FTYPE_FILE:
199 case AFS_FTYPE_DIR:
200 case AFS_FTYPE_SYMLINK:
201 status->type = type;
202 break;
203 default:
204 goto bad;
205 }
206
207 status->nlink = ntohl(xdr->nlink);
208 status->author = xdr_to_u64(xdr->author);
209 status->owner = xdr_to_u64(xdr->owner);
210 status->caller_access = ntohl(xdr->caller_access); /* Ticket dependent */
211 status->anon_access = ntohl(xdr->anon_access);
212 status->mode = ntohl(xdr->mode) & S_IALLUGO;
213 status->group = xdr_to_u64(xdr->group);
214 status->lock_count = ntohl(xdr->lock_count);
215
216 status->mtime_client = xdr_to_time(xdr->mtime_client);
217 status->mtime_server = xdr_to_time(xdr->mtime_server);
218 status->size = xdr_to_u64(xdr->size);
219 status->data_version = xdr_to_u64(xdr->data_version);
220 scb->have_status = true;
221advance:
222 *_bp += xdr_size(xdr);
223 return;
224
225bad:
226 xdr_dump_bad(*_bp);
227 afs_protocol_error(call, afs_eproto_bad_status);
228 goto advance;
229}
230
231/*
232 * Decode a YFSCallBack block
233 */
234static void xdr_decode_YFSCallBack(const __be32 **_bp,
235 struct afs_call *call,
236 struct afs_status_cb *scb)
237{
238 struct yfs_xdr_YFSCallBack *x = (void *)*_bp;
239 struct afs_callback *cb = &scb->callback;
240 ktime_t cb_expiry;
241
242 cb_expiry = call->reply_time;
243 cb_expiry = ktime_add(cb_expiry, xdr_to_u64(x->expiration_time) * 100);
244 cb->expires_at = ktime_divns(cb_expiry, NSEC_PER_SEC);
245 scb->have_cb = true;
246 *_bp += xdr_size(x);
247}
248
249/*
250 * Decode a YFSVolSync block
251 */
252static void xdr_decode_YFSVolSync(const __be32 **_bp,
253 struct afs_volsync *volsync)
254{
255 struct yfs_xdr_YFSVolSync *x = (void *)*_bp;
256 u64 creation;
257
258 if (volsync) {
259 creation = xdr_to_u64(x->vol_creation_date);
260 do_div(creation, 10 * 1000 * 1000);
261 volsync->creation = creation;
262 }
263
264 *_bp += xdr_size(x);
265}
266
267/*
268 * Encode the requested attributes into a YFSStoreStatus block
269 */
270static __be32 *xdr_encode_YFS_StoreStatus(__be32 *bp, struct iattr *attr)
271{
272 struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
273 s64 mtime = 0, owner = 0, group = 0;
274 u32 mask = 0, mode = 0;
275
276 mask = 0;
277 if (attr->ia_valid & ATTR_MTIME) {
278 mask |= AFS_SET_MTIME;
279 mtime = linux_to_yfs_time(&attr->ia_mtime);
280 }
281
282 if (attr->ia_valid & ATTR_UID) {
283 mask |= AFS_SET_OWNER;
284 owner = from_kuid(&init_user_ns, attr->ia_uid);
285 }
286
287 if (attr->ia_valid & ATTR_GID) {
288 mask |= AFS_SET_GROUP;
289 group = from_kgid(&init_user_ns, attr->ia_gid);
290 }
291
292 if (attr->ia_valid & ATTR_MODE) {
293 mask |= AFS_SET_MODE;
294 mode = attr->ia_mode & S_IALLUGO;
295 }
296
297 x->mask = htonl(mask);
298 x->mode = htonl(mode);
299 x->mtime_client = u64_to_xdr(mtime);
300 x->owner = u64_to_xdr(owner);
301 x->group = u64_to_xdr(group);
302 return bp + xdr_size(x);
303}
304
305/*
306 * Decode a YFSFetchVolumeStatus block.
307 */
308static void xdr_decode_YFSFetchVolumeStatus(const __be32 **_bp,
309 struct afs_volume_status *vs)
310{
311 const struct yfs_xdr_YFSFetchVolumeStatus *x = (const void *)*_bp;
312 u32 flags;
313
314 vs->vid = xdr_to_u64(x->vid);
315 vs->parent_id = xdr_to_u64(x->parent_id);
316 flags = ntohl(x->flags);
317 vs->online = flags & yfs_FVSOnline;
318 vs->in_service = flags & yfs_FVSInservice;
319 vs->blessed = flags & yfs_FVSBlessed;
320 vs->needs_salvage = flags & yfs_FVSNeedsSalvage;
321 vs->type = ntohl(x->type);
322 vs->min_quota = 0;
323 vs->max_quota = xdr_to_u64(x->max_quota);
324 vs->blocks_in_use = xdr_to_u64(x->blocks_in_use);
325 vs->part_blocks_avail = xdr_to_u64(x->part_blocks_avail);
326 vs->part_max_blocks = xdr_to_u64(x->part_max_blocks);
327 vs->vol_copy_date = xdr_to_u64(x->vol_copy_date);
328 vs->vol_backup_date = xdr_to_u64(x->vol_backup_date);
329 *_bp += sizeof(*x) / sizeof(__be32);
330}
331
332/*
333 * Deliver reply data to operations that just return a file status and a volume
334 * sync record.
335 */
336static int yfs_deliver_status_and_volsync(struct afs_call *call)
337{
338 struct afs_operation *op = call->op;
339 const __be32 *bp;
340 int ret;
341
342 ret = afs_transfer_reply(call);
343 if (ret < 0)
344 return ret;
345
346 bp = call->buffer;
347 xdr_decode_YFSFetchStatus(&bp, call, &op->file[0].scb);
348 xdr_decode_YFSVolSync(&bp, &op->volsync);
349
350 _leave(" = 0 [done]");
351 return 0;
352}
353
354/*
355 * Deliver reply data to an YFS.FetchData64.
356 */
357static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
358{
359 struct afs_operation *op = call->op;
360 struct afs_vnode_param *vp = &op->file[0];
361 struct afs_read *req = op->fetch.req;
362 const __be32 *bp;
363 unsigned int size;
364 int ret;
365
366 _enter("{%u,%zu/%llu}",
367 call->unmarshall, iov_iter_count(call->iter), req->actual_len);
368
369 switch (call->unmarshall) {
370 case 0:
371 req->actual_len = 0;
372 req->index = 0;
373 req->offset = req->pos & (PAGE_SIZE - 1);
374 afs_extract_to_tmp64(call);
375 call->unmarshall++;
376 fallthrough;
377
378 /* extract the returned data length */
379 case 1:
380 _debug("extract data length");
381 ret = afs_extract_data(call, true);
382 if (ret < 0)
383 return ret;
384
385 req->actual_len = be64_to_cpu(call->tmp64);
386 _debug("DATA length: %llu", req->actual_len);
387 req->remain = min(req->len, req->actual_len);
388 if (req->remain == 0)
389 goto no_more_data;
390
391 call->unmarshall++;
392
393 begin_page:
394 ASSERTCMP(req->index, <, req->nr_pages);
395 if (req->remain > PAGE_SIZE - req->offset)
396 size = PAGE_SIZE - req->offset;
397 else
398 size = req->remain;
399 call->bvec[0].bv_len = size;
400 call->bvec[0].bv_offset = req->offset;
401 call->bvec[0].bv_page = req->pages[req->index];
402 iov_iter_bvec(&call->def_iter, READ, call->bvec, 1, size);
403 ASSERTCMP(size, <=, PAGE_SIZE);
404 fallthrough;
405
406 /* extract the returned data */
407 case 2:
408 _debug("extract data %zu/%llu",
409 iov_iter_count(call->iter), req->remain);
410
411 ret = afs_extract_data(call, true);
412 if (ret < 0)
413 return ret;
414 req->remain -= call->bvec[0].bv_len;
415 req->offset += call->bvec[0].bv_len;
416 ASSERTCMP(req->offset, <=, PAGE_SIZE);
417 if (req->offset == PAGE_SIZE) {
418 req->offset = 0;
419 req->index++;
420 if (req->remain > 0)
421 goto begin_page;
422 }
423
424 ASSERTCMP(req->remain, ==, 0);
425 if (req->actual_len <= req->len)
426 goto no_more_data;
427
428 /* Discard any excess data the server gave us */
429 afs_extract_discard(call, req->actual_len - req->len);
430 call->unmarshall = 3;
431 fallthrough;
432
433 case 3:
434 _debug("extract discard %zu/%llu",
435 iov_iter_count(call->iter), req->actual_len - req->len);
436
437 ret = afs_extract_data(call, true);
438 if (ret < 0)
439 return ret;
440
441 no_more_data:
442 call->unmarshall = 4;
443 afs_extract_to_buf(call,
444 sizeof(struct yfs_xdr_YFSFetchStatus) +
445 sizeof(struct yfs_xdr_YFSCallBack) +
446 sizeof(struct yfs_xdr_YFSVolSync));
447 fallthrough;
448
449 /* extract the metadata */
450 case 4:
451 ret = afs_extract_data(call, false);
452 if (ret < 0)
453 return ret;
454
455 bp = call->buffer;
456 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
457 xdr_decode_YFSCallBack(&bp, call, &vp->scb);
458 xdr_decode_YFSVolSync(&bp, &op->volsync);
459
460 req->data_version = vp->scb.status.data_version;
461 req->file_size = vp->scb.status.size;
462
463 call->unmarshall++;
464 fallthrough;
465
466 case 5:
467 break;
468 }
469
470 for (; req->index < req->nr_pages; req->index++) {
471 if (req->offset < PAGE_SIZE)
472 zero_user_segment(req->pages[req->index],
473 req->offset, PAGE_SIZE);
474 req->offset = 0;
475 }
476
477 if (req->page_done)
478 for (req->index = 0; req->index < req->nr_pages; req->index++)
479 req->page_done(req);
480
481 _leave(" = 0 [done]");
482 return 0;
483}
484
485/*
486 * YFS.FetchData64 operation type
487 */
488static const struct afs_call_type yfs_RXYFSFetchData64 = {
489 .name = "YFS.FetchData64",
490 .op = yfs_FS_FetchData64,
491 .deliver = yfs_deliver_fs_fetch_data64,
492 .destructor = afs_flat_call_destructor,
493};
494
495/*
496 * Fetch data from a file.
497 */
498void yfs_fs_fetch_data(struct afs_operation *op)
499{
500 struct afs_vnode_param *vp = &op->file[0];
501 struct afs_read *req = op->fetch.req;
502 struct afs_call *call;
503 __be32 *bp;
504
505 _enter(",%x,{%llx:%llu},%llx,%llx",
506 key_serial(op->key), vp->fid.vid, vp->fid.vnode,
507 req->pos, req->len);
508
509 call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchData64,
510 sizeof(__be32) * 2 +
511 sizeof(struct yfs_xdr_YFSFid) +
512 sizeof(struct yfs_xdr_u64) * 2,
513 sizeof(struct yfs_xdr_YFSFetchStatus) +
514 sizeof(struct yfs_xdr_YFSCallBack) +
515 sizeof(struct yfs_xdr_YFSVolSync));
516 if (!call)
517 return afs_op_nomem(op);
518
519 /* marshall the parameters */
520 bp = call->request;
521 bp = xdr_encode_u32(bp, YFSFETCHDATA64);
522 bp = xdr_encode_u32(bp, 0); /* RPC flags */
523 bp = xdr_encode_YFSFid(bp, &vp->fid);
524 bp = xdr_encode_u64(bp, req->pos);
525 bp = xdr_encode_u64(bp, req->len);
526 yfs_check_req(call, bp);
527
528 trace_afs_make_fs_call(call, &vp->fid);
529 afs_make_op_call(op, call, GFP_NOFS);
530}
531
532/*
533 * Deliver reply data for YFS.CreateFile or YFS.MakeDir.
534 */
535static int yfs_deliver_fs_create_vnode(struct afs_call *call)
536{
537 struct afs_operation *op = call->op;
538 struct afs_vnode_param *dvp = &op->file[0];
539 struct afs_vnode_param *vp = &op->file[1];
540 const __be32 *bp;
541 int ret;
542
543 _enter("{%u}", call->unmarshall);
544
545 ret = afs_transfer_reply(call);
546 if (ret < 0)
547 return ret;
548
549 /* unmarshall the reply once we've received all of it */
550 bp = call->buffer;
551 xdr_decode_YFSFid(&bp, &op->file[1].fid);
552 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
553 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
554 xdr_decode_YFSCallBack(&bp, call, &vp->scb);
555 xdr_decode_YFSVolSync(&bp, &op->volsync);
556
557 _leave(" = 0 [done]");
558 return 0;
559}
560
561/*
562 * FS.CreateFile and FS.MakeDir operation type
563 */
564static const struct afs_call_type afs_RXFSCreateFile = {
565 .name = "YFS.CreateFile",
566 .op = yfs_FS_CreateFile,
567 .deliver = yfs_deliver_fs_create_vnode,
568 .destructor = afs_flat_call_destructor,
569};
570
571/*
572 * Create a file.
573 */
574void yfs_fs_create_file(struct afs_operation *op)
575{
576 const struct qstr *name = &op->dentry->d_name;
577 struct afs_vnode_param *dvp = &op->file[0];
578 struct afs_call *call;
579 size_t reqsz, rplsz;
580 __be32 *bp;
581
582 _enter("");
583
584 reqsz = (sizeof(__be32) +
585 sizeof(__be32) +
586 sizeof(struct yfs_xdr_YFSFid) +
587 xdr_strlen(name->len) +
588 sizeof(struct yfs_xdr_YFSStoreStatus) +
589 sizeof(__be32));
590 rplsz = (sizeof(struct yfs_xdr_YFSFid) +
591 sizeof(struct yfs_xdr_YFSFetchStatus) +
592 sizeof(struct yfs_xdr_YFSFetchStatus) +
593 sizeof(struct yfs_xdr_YFSCallBack) +
594 sizeof(struct yfs_xdr_YFSVolSync));
595
596 call = afs_alloc_flat_call(op->net, &afs_RXFSCreateFile, reqsz, rplsz);
597 if (!call)
598 return afs_op_nomem(op);
599
600 /* marshall the parameters */
601 bp = call->request;
602 bp = xdr_encode_u32(bp, YFSCREATEFILE);
603 bp = xdr_encode_u32(bp, 0); /* RPC flags */
604 bp = xdr_encode_YFSFid(bp, &dvp->fid);
605 bp = xdr_encode_name(bp, name);
606 bp = xdr_encode_YFSStoreStatus_mode(bp, op->create.mode);
607 bp = xdr_encode_u32(bp, yfs_LockNone); /* ViceLockType */
608 yfs_check_req(call, bp);
609
610 trace_afs_make_fs_call1(call, &dvp->fid, name);
611 afs_make_op_call(op, call, GFP_NOFS);
612}
613
614static const struct afs_call_type yfs_RXFSMakeDir = {
615 .name = "YFS.MakeDir",
616 .op = yfs_FS_MakeDir,
617 .deliver = yfs_deliver_fs_create_vnode,
618 .destructor = afs_flat_call_destructor,
619};
620
621/*
622 * Make a directory.
623 */
624void yfs_fs_make_dir(struct afs_operation *op)
625{
626 const struct qstr *name = &op->dentry->d_name;
627 struct afs_vnode_param *dvp = &op->file[0];
628 struct afs_call *call;
629 size_t reqsz, rplsz;
630 __be32 *bp;
631
632 _enter("");
633
634 reqsz = (sizeof(__be32) +
635 sizeof(struct yfs_xdr_RPCFlags) +
636 sizeof(struct yfs_xdr_YFSFid) +
637 xdr_strlen(name->len) +
638 sizeof(struct yfs_xdr_YFSStoreStatus));
639 rplsz = (sizeof(struct yfs_xdr_YFSFid) +
640 sizeof(struct yfs_xdr_YFSFetchStatus) +
641 sizeof(struct yfs_xdr_YFSFetchStatus) +
642 sizeof(struct yfs_xdr_YFSCallBack) +
643 sizeof(struct yfs_xdr_YFSVolSync));
644
645 call = afs_alloc_flat_call(op->net, &yfs_RXFSMakeDir, reqsz, rplsz);
646 if (!call)
647 return afs_op_nomem(op);
648
649 /* marshall the parameters */
650 bp = call->request;
651 bp = xdr_encode_u32(bp, YFSMAKEDIR);
652 bp = xdr_encode_u32(bp, 0); /* RPC flags */
653 bp = xdr_encode_YFSFid(bp, &dvp->fid);
654 bp = xdr_encode_name(bp, name);
655 bp = xdr_encode_YFSStoreStatus_mode(bp, op->create.mode);
656 yfs_check_req(call, bp);
657
658 trace_afs_make_fs_call1(call, &dvp->fid, name);
659 afs_make_op_call(op, call, GFP_NOFS);
660}
661
662/*
663 * Deliver reply data to a YFS.RemoveFile2 operation.
664 */
665static int yfs_deliver_fs_remove_file2(struct afs_call *call)
666{
667 struct afs_operation *op = call->op;
668 struct afs_vnode_param *dvp = &op->file[0];
669 struct afs_vnode_param *vp = &op->file[1];
670 struct afs_fid fid;
671 const __be32 *bp;
672 int ret;
673
674 _enter("{%u}", call->unmarshall);
675
676 ret = afs_transfer_reply(call);
677 if (ret < 0)
678 return ret;
679
680 bp = call->buffer;
681 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
682 xdr_decode_YFSFid(&bp, &fid);
683 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
684 /* Was deleted if vnode->status.abort_code == VNOVNODE. */
685
686 xdr_decode_YFSVolSync(&bp, &op->volsync);
687 return 0;
688}
689
690static void yfs_done_fs_remove_file2(struct afs_call *call)
691{
692 if (call->error == -ECONNABORTED &&
693 call->abort_code == RX_INVALID_OPERATION) {
694 set_bit(AFS_SERVER_FL_NO_RM2, &call->server->flags);
695 call->op->flags |= AFS_OPERATION_DOWNGRADE;
696 }
697}
698
699/*
700 * YFS.RemoveFile2 operation type.
701 */
702static const struct afs_call_type yfs_RXYFSRemoveFile2 = {
703 .name = "YFS.RemoveFile2",
704 .op = yfs_FS_RemoveFile2,
705 .deliver = yfs_deliver_fs_remove_file2,
706 .done = yfs_done_fs_remove_file2,
707 .destructor = afs_flat_call_destructor,
708};
709
710/*
711 * Remove a file and retrieve new file status.
712 */
713void yfs_fs_remove_file2(struct afs_operation *op)
714{
715 struct afs_vnode_param *dvp = &op->file[0];
716 const struct qstr *name = &op->dentry->d_name;
717 struct afs_call *call;
718 __be32 *bp;
719
720 _enter("");
721
722 call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveFile2,
723 sizeof(__be32) +
724 sizeof(struct yfs_xdr_RPCFlags) +
725 sizeof(struct yfs_xdr_YFSFid) +
726 xdr_strlen(name->len),
727 sizeof(struct yfs_xdr_YFSFetchStatus) +
728 sizeof(struct yfs_xdr_YFSFid) +
729 sizeof(struct yfs_xdr_YFSFetchStatus) +
730 sizeof(struct yfs_xdr_YFSVolSync));
731 if (!call)
732 return afs_op_nomem(op);
733
734 /* marshall the parameters */
735 bp = call->request;
736 bp = xdr_encode_u32(bp, YFSREMOVEFILE2);
737 bp = xdr_encode_u32(bp, 0); /* RPC flags */
738 bp = xdr_encode_YFSFid(bp, &dvp->fid);
739 bp = xdr_encode_name(bp, name);
740 yfs_check_req(call, bp);
741
742 trace_afs_make_fs_call1(call, &dvp->fid, name);
743 afs_make_op_call(op, call, GFP_NOFS);
744}
745
746/*
747 * Deliver reply data to a YFS.RemoveFile or YFS.RemoveDir operation.
748 */
749static int yfs_deliver_fs_remove(struct afs_call *call)
750{
751 struct afs_operation *op = call->op;
752 struct afs_vnode_param *dvp = &op->file[0];
753 const __be32 *bp;
754 int ret;
755
756 _enter("{%u}", call->unmarshall);
757
758 ret = afs_transfer_reply(call);
759 if (ret < 0)
760 return ret;
761
762 bp = call->buffer;
763 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
764 xdr_decode_YFSVolSync(&bp, &op->volsync);
765 return 0;
766}
767
768/*
769 * FS.RemoveDir and FS.RemoveFile operation types.
770 */
771static const struct afs_call_type yfs_RXYFSRemoveFile = {
772 .name = "YFS.RemoveFile",
773 .op = yfs_FS_RemoveFile,
774 .deliver = yfs_deliver_fs_remove,
775 .destructor = afs_flat_call_destructor,
776};
777
778/*
779 * Remove a file.
780 */
781void yfs_fs_remove_file(struct afs_operation *op)
782{
783 const struct qstr *name = &op->dentry->d_name;
784 struct afs_vnode_param *dvp = &op->file[0];
785 struct afs_call *call;
786 __be32 *bp;
787
788 _enter("");
789
790 if (!test_bit(AFS_SERVER_FL_NO_RM2, &op->server->flags))
791 return yfs_fs_remove_file2(op);
792
793 call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveFile,
794 sizeof(__be32) +
795 sizeof(struct yfs_xdr_RPCFlags) +
796 sizeof(struct yfs_xdr_YFSFid) +
797 xdr_strlen(name->len),
798 sizeof(struct yfs_xdr_YFSFetchStatus) +
799 sizeof(struct yfs_xdr_YFSVolSync));
800 if (!call)
801 return afs_op_nomem(op);
802
803 /* marshall the parameters */
804 bp = call->request;
805 bp = xdr_encode_u32(bp, YFSREMOVEFILE);
806 bp = xdr_encode_u32(bp, 0); /* RPC flags */
807 bp = xdr_encode_YFSFid(bp, &dvp->fid);
808 bp = xdr_encode_name(bp, name);
809 yfs_check_req(call, bp);
810
811 trace_afs_make_fs_call1(call, &dvp->fid, name);
812 afs_make_op_call(op, call, GFP_NOFS);
813}
814
815static const struct afs_call_type yfs_RXYFSRemoveDir = {
816 .name = "YFS.RemoveDir",
817 .op = yfs_FS_RemoveDir,
818 .deliver = yfs_deliver_fs_remove,
819 .destructor = afs_flat_call_destructor,
820};
821
822/*
823 * Remove a directory.
824 */
825void yfs_fs_remove_dir(struct afs_operation *op)
826{
827 const struct qstr *name = &op->dentry->d_name;
828 struct afs_vnode_param *dvp = &op->file[0];
829 struct afs_call *call;
830 __be32 *bp;
831
832 _enter("");
833
834 call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveDir,
835 sizeof(__be32) +
836 sizeof(struct yfs_xdr_RPCFlags) +
837 sizeof(struct yfs_xdr_YFSFid) +
838 xdr_strlen(name->len),
839 sizeof(struct yfs_xdr_YFSFetchStatus) +
840 sizeof(struct yfs_xdr_YFSVolSync));
841 if (!call)
842 return afs_op_nomem(op);
843
844 /* marshall the parameters */
845 bp = call->request;
846 bp = xdr_encode_u32(bp, YFSREMOVEDIR);
847 bp = xdr_encode_u32(bp, 0); /* RPC flags */
848 bp = xdr_encode_YFSFid(bp, &dvp->fid);
849 bp = xdr_encode_name(bp, name);
850 yfs_check_req(call, bp);
851
852 trace_afs_make_fs_call1(call, &dvp->fid, name);
853 afs_make_op_call(op, call, GFP_NOFS);
854}
855
856/*
857 * Deliver reply data to a YFS.Link operation.
858 */
859static int yfs_deliver_fs_link(struct afs_call *call)
860{
861 struct afs_operation *op = call->op;
862 struct afs_vnode_param *dvp = &op->file[0];
863 struct afs_vnode_param *vp = &op->file[1];
864 const __be32 *bp;
865 int ret;
866
867 _enter("{%u}", call->unmarshall);
868
869 ret = afs_transfer_reply(call);
870 if (ret < 0)
871 return ret;
872
873 bp = call->buffer;
874 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
875 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
876 xdr_decode_YFSVolSync(&bp, &op->volsync);
877 _leave(" = 0 [done]");
878 return 0;
879}
880
881/*
882 * YFS.Link operation type.
883 */
884static const struct afs_call_type yfs_RXYFSLink = {
885 .name = "YFS.Link",
886 .op = yfs_FS_Link,
887 .deliver = yfs_deliver_fs_link,
888 .destructor = afs_flat_call_destructor,
889};
890
891/*
892 * Make a hard link.
893 */
894void yfs_fs_link(struct afs_operation *op)
895{
896 const struct qstr *name = &op->dentry->d_name;
897 struct afs_vnode_param *dvp = &op->file[0];
898 struct afs_vnode_param *vp = &op->file[1];
899 struct afs_call *call;
900 __be32 *bp;
901
902 _enter("");
903
904 call = afs_alloc_flat_call(op->net, &yfs_RXYFSLink,
905 sizeof(__be32) +
906 sizeof(struct yfs_xdr_RPCFlags) +
907 sizeof(struct yfs_xdr_YFSFid) +
908 xdr_strlen(name->len) +
909 sizeof(struct yfs_xdr_YFSFid),
910 sizeof(struct yfs_xdr_YFSFetchStatus) +
911 sizeof(struct yfs_xdr_YFSFetchStatus) +
912 sizeof(struct yfs_xdr_YFSVolSync));
913 if (!call)
914 return afs_op_nomem(op);
915
916 /* marshall the parameters */
917 bp = call->request;
918 bp = xdr_encode_u32(bp, YFSLINK);
919 bp = xdr_encode_u32(bp, 0); /* RPC flags */
920 bp = xdr_encode_YFSFid(bp, &dvp->fid);
921 bp = xdr_encode_name(bp, name);
922 bp = xdr_encode_YFSFid(bp, &vp->fid);
923 yfs_check_req(call, bp);
924
925 trace_afs_make_fs_call1(call, &vp->fid, name);
926 afs_make_op_call(op, call, GFP_NOFS);
927}
928
929/*
930 * Deliver reply data to a YFS.Symlink operation.
931 */
932static int yfs_deliver_fs_symlink(struct afs_call *call)
933{
934 struct afs_operation *op = call->op;
935 struct afs_vnode_param *dvp = &op->file[0];
936 struct afs_vnode_param *vp = &op->file[1];
937 const __be32 *bp;
938 int ret;
939
940 _enter("{%u}", call->unmarshall);
941
942 ret = afs_transfer_reply(call);
943 if (ret < 0)
944 return ret;
945
946 /* unmarshall the reply once we've received all of it */
947 bp = call->buffer;
948 xdr_decode_YFSFid(&bp, &vp->fid);
949 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
950 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
951 xdr_decode_YFSVolSync(&bp, &op->volsync);
952
953 _leave(" = 0 [done]");
954 return 0;
955}
956
957/*
958 * YFS.Symlink operation type
959 */
960static const struct afs_call_type yfs_RXYFSSymlink = {
961 .name = "YFS.Symlink",
962 .op = yfs_FS_Symlink,
963 .deliver = yfs_deliver_fs_symlink,
964 .destructor = afs_flat_call_destructor,
965};
966
967/*
968 * Create a symbolic link.
969 */
970void yfs_fs_symlink(struct afs_operation *op)
971{
972 const struct qstr *name = &op->dentry->d_name;
973 struct afs_vnode_param *dvp = &op->file[0];
974 struct afs_call *call;
975 size_t contents_sz;
976 __be32 *bp;
977
978 _enter("");
979
980 contents_sz = strlen(op->create.symlink);
981 call = afs_alloc_flat_call(op->net, &yfs_RXYFSSymlink,
982 sizeof(__be32) +
983 sizeof(struct yfs_xdr_RPCFlags) +
984 sizeof(struct yfs_xdr_YFSFid) +
985 xdr_strlen(name->len) +
986 xdr_strlen(contents_sz) +
987 sizeof(struct yfs_xdr_YFSStoreStatus),
988 sizeof(struct yfs_xdr_YFSFid) +
989 sizeof(struct yfs_xdr_YFSFetchStatus) +
990 sizeof(struct yfs_xdr_YFSFetchStatus) +
991 sizeof(struct yfs_xdr_YFSVolSync));
992 if (!call)
993 return afs_op_nomem(op);
994
995 /* marshall the parameters */
996 bp = call->request;
997 bp = xdr_encode_u32(bp, YFSSYMLINK);
998 bp = xdr_encode_u32(bp, 0); /* RPC flags */
999 bp = xdr_encode_YFSFid(bp, &dvp->fid);
1000 bp = xdr_encode_name(bp, name);
1001 bp = xdr_encode_string(bp, op->create.symlink, contents_sz);
1002 bp = xdr_encode_YFSStoreStatus_mode(bp, S_IRWXUGO);
1003 yfs_check_req(call, bp);
1004
1005 trace_afs_make_fs_call1(call, &dvp->fid, name);
1006 afs_make_op_call(op, call, GFP_NOFS);
1007}
1008
1009/*
1010 * Deliver reply data to a YFS.Rename operation.
1011 */
1012static int yfs_deliver_fs_rename(struct afs_call *call)
1013{
1014 struct afs_operation *op = call->op;
1015 struct afs_vnode_param *orig_dvp = &op->file[0];
1016 struct afs_vnode_param *new_dvp = &op->file[1];
1017 const __be32 *bp;
1018 int ret;
1019
1020 _enter("{%u}", call->unmarshall);
1021
1022 ret = afs_transfer_reply(call);
1023 if (ret < 0)
1024 return ret;
1025
1026 bp = call->buffer;
1027 /* If the two dirs are the same, we have two copies of the same status
1028 * report, so we just decode it twice.
1029 */
1030 xdr_decode_YFSFetchStatus(&bp, call, &orig_dvp->scb);
1031 xdr_decode_YFSFetchStatus(&bp, call, &new_dvp->scb);
1032 xdr_decode_YFSVolSync(&bp, &op->volsync);
1033 _leave(" = 0 [done]");
1034 return 0;
1035}
1036
1037/*
1038 * YFS.Rename operation type
1039 */
1040static const struct afs_call_type yfs_RXYFSRename = {
1041 .name = "FS.Rename",
1042 .op = yfs_FS_Rename,
1043 .deliver = yfs_deliver_fs_rename,
1044 .destructor = afs_flat_call_destructor,
1045};
1046
1047/*
1048 * Rename a file or directory.
1049 */
1050void yfs_fs_rename(struct afs_operation *op)
1051{
1052 struct afs_vnode_param *orig_dvp = &op->file[0];
1053 struct afs_vnode_param *new_dvp = &op->file[1];
1054 const struct qstr *orig_name = &op->dentry->d_name;
1055 const struct qstr *new_name = &op->dentry_2->d_name;
1056 struct afs_call *call;
1057 __be32 *bp;
1058
1059 _enter("");
1060
1061 call = afs_alloc_flat_call(op->net, &yfs_RXYFSRename,
1062 sizeof(__be32) +
1063 sizeof(struct yfs_xdr_RPCFlags) +
1064 sizeof(struct yfs_xdr_YFSFid) +
1065 xdr_strlen(orig_name->len) +
1066 sizeof(struct yfs_xdr_YFSFid) +
1067 xdr_strlen(new_name->len),
1068 sizeof(struct yfs_xdr_YFSFetchStatus) +
1069 sizeof(struct yfs_xdr_YFSFetchStatus) +
1070 sizeof(struct yfs_xdr_YFSVolSync));
1071 if (!call)
1072 return afs_op_nomem(op);
1073
1074 /* marshall the parameters */
1075 bp = call->request;
1076 bp = xdr_encode_u32(bp, YFSRENAME);
1077 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1078 bp = xdr_encode_YFSFid(bp, &orig_dvp->fid);
1079 bp = xdr_encode_name(bp, orig_name);
1080 bp = xdr_encode_YFSFid(bp, &new_dvp->fid);
1081 bp = xdr_encode_name(bp, new_name);
1082 yfs_check_req(call, bp);
1083
1084 trace_afs_make_fs_call2(call, &orig_dvp->fid, orig_name, new_name);
1085 afs_make_op_call(op, call, GFP_NOFS);
1086}
1087
1088/*
1089 * YFS.StoreData64 operation type.
1090 */
1091static const struct afs_call_type yfs_RXYFSStoreData64 = {
1092 .name = "YFS.StoreData64",
1093 .op = yfs_FS_StoreData64,
1094 .deliver = yfs_deliver_status_and_volsync,
1095 .destructor = afs_flat_call_destructor,
1096};
1097
1098/*
1099 * Store a set of pages to a large file.
1100 */
1101void yfs_fs_store_data(struct afs_operation *op)
1102{
1103 struct afs_vnode_param *vp = &op->file[0];
1104 struct afs_call *call;
1105 loff_t size, pos, i_size;
1106 __be32 *bp;
1107
1108 _enter(",%x,{%llx:%llu},,",
1109 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1110
1111 size = (loff_t)op->store.last_to - (loff_t)op->store.first_offset;
1112 if (op->store.first != op->store.last)
1113 size += (loff_t)(op->store.last - op->store.first) << PAGE_SHIFT;
1114 pos = (loff_t)op->store.first << PAGE_SHIFT;
1115 pos += op->store.first_offset;
1116
1117 i_size = i_size_read(&vp->vnode->vfs_inode);
1118 if (pos + size > i_size)
1119 i_size = size + pos;
1120
1121 _debug("size %llx, at %llx, i_size %llx",
1122 (unsigned long long)size, (unsigned long long)pos,
1123 (unsigned long long)i_size);
1124
1125 call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreData64,
1126 sizeof(__be32) +
1127 sizeof(__be32) +
1128 sizeof(struct yfs_xdr_YFSFid) +
1129 sizeof(struct yfs_xdr_YFSStoreStatus) +
1130 sizeof(struct yfs_xdr_u64) * 3,
1131 sizeof(struct yfs_xdr_YFSFetchStatus) +
1132 sizeof(struct yfs_xdr_YFSVolSync));
1133 if (!call)
1134 return afs_op_nomem(op);
1135
1136 call->key = op->key;
1137 call->send_pages = true;
1138
1139 /* marshall the parameters */
1140 bp = call->request;
1141 bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1142 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1143 bp = xdr_encode_YFSFid(bp, &vp->fid);
1144 bp = xdr_encode_YFSStoreStatus_mtime(bp, &op->mtime);
1145 bp = xdr_encode_u64(bp, pos);
1146 bp = xdr_encode_u64(bp, size);
1147 bp = xdr_encode_u64(bp, i_size);
1148 yfs_check_req(call, bp);
1149
1150 trace_afs_make_fs_call(call, &vp->fid);
1151 afs_make_op_call(op, call, GFP_NOFS);
1152}
1153
1154/*
1155 * YFS.StoreStatus operation type
1156 */
1157static const struct afs_call_type yfs_RXYFSStoreStatus = {
1158 .name = "YFS.StoreStatus",
1159 .op = yfs_FS_StoreStatus,
1160 .deliver = yfs_deliver_status_and_volsync,
1161 .destructor = afs_flat_call_destructor,
1162};
1163
1164static const struct afs_call_type yfs_RXYFSStoreData64_as_Status = {
1165 .name = "YFS.StoreData64",
1166 .op = yfs_FS_StoreData64,
1167 .deliver = yfs_deliver_status_and_volsync,
1168 .destructor = afs_flat_call_destructor,
1169};
1170
1171/*
1172 * Set the attributes on a file, using YFS.StoreData64 rather than
1173 * YFS.StoreStatus so as to alter the file size also.
1174 */
1175static void yfs_fs_setattr_size(struct afs_operation *op)
1176{
1177 struct afs_vnode_param *vp = &op->file[0];
1178 struct afs_call *call;
1179 struct iattr *attr = op->setattr.attr;
1180 __be32 *bp;
1181
1182 _enter(",%x,{%llx:%llu},,",
1183 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1184
1185 call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreData64_as_Status,
1186 sizeof(__be32) * 2 +
1187 sizeof(struct yfs_xdr_YFSFid) +
1188 sizeof(struct yfs_xdr_YFSStoreStatus) +
1189 sizeof(struct yfs_xdr_u64) * 3,
1190 sizeof(struct yfs_xdr_YFSFetchStatus) +
1191 sizeof(struct yfs_xdr_YFSVolSync));
1192 if (!call)
1193 return afs_op_nomem(op);
1194
1195 /* marshall the parameters */
1196 bp = call->request;
1197 bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1198 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1199 bp = xdr_encode_YFSFid(bp, &vp->fid);
1200 bp = xdr_encode_YFS_StoreStatus(bp, attr);
1201 bp = xdr_encode_u64(bp, attr->ia_size); /* position of start of write */
1202 bp = xdr_encode_u64(bp, 0); /* size of write */
1203 bp = xdr_encode_u64(bp, attr->ia_size); /* new file length */
1204 yfs_check_req(call, bp);
1205
1206 trace_afs_make_fs_call(call, &vp->fid);
1207 afs_make_op_call(op, call, GFP_NOFS);
1208}
1209
1210/*
1211 * Set the attributes on a file, using YFS.StoreData64 if there's a change in
1212 * file size, and YFS.StoreStatus otherwise.
1213 */
1214void yfs_fs_setattr(struct afs_operation *op)
1215{
1216 struct afs_vnode_param *vp = &op->file[0];
1217 struct afs_call *call;
1218 struct iattr *attr = op->setattr.attr;
1219 __be32 *bp;
1220
1221 if (attr->ia_valid & ATTR_SIZE)
1222 return yfs_fs_setattr_size(op);
1223
1224 _enter(",%x,{%llx:%llu},,",
1225 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1226
1227 call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreStatus,
1228 sizeof(__be32) * 2 +
1229 sizeof(struct yfs_xdr_YFSFid) +
1230 sizeof(struct yfs_xdr_YFSStoreStatus),
1231 sizeof(struct yfs_xdr_YFSFetchStatus) +
1232 sizeof(struct yfs_xdr_YFSVolSync));
1233 if (!call)
1234 return afs_op_nomem(op);
1235
1236 /* marshall the parameters */
1237 bp = call->request;
1238 bp = xdr_encode_u32(bp, YFSSTORESTATUS);
1239 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1240 bp = xdr_encode_YFSFid(bp, &vp->fid);
1241 bp = xdr_encode_YFS_StoreStatus(bp, attr);
1242 yfs_check_req(call, bp);
1243
1244 trace_afs_make_fs_call(call, &vp->fid);
1245 afs_make_op_call(op, call, GFP_NOFS);
1246}
1247
1248/*
1249 * Deliver reply data to a YFS.GetVolumeStatus operation.
1250 */
1251static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
1252{
1253 struct afs_operation *op = call->op;
1254 const __be32 *bp;
1255 char *p;
1256 u32 size;
1257 int ret;
1258
1259 _enter("{%u}", call->unmarshall);
1260
1261 switch (call->unmarshall) {
1262 case 0:
1263 call->unmarshall++;
1264 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchVolumeStatus));
1265 fallthrough;
1266
1267 /* extract the returned status record */
1268 case 1:
1269 _debug("extract status");
1270 ret = afs_extract_data(call, true);
1271 if (ret < 0)
1272 return ret;
1273
1274 bp = call->buffer;
1275 xdr_decode_YFSFetchVolumeStatus(&bp, &op->volstatus.vs);
1276 call->unmarshall++;
1277 afs_extract_to_tmp(call);
1278 fallthrough;
1279
1280 /* extract the volume name length */
1281 case 2:
1282 ret = afs_extract_data(call, true);
1283 if (ret < 0)
1284 return ret;
1285
1286 call->count = ntohl(call->tmp);
1287 _debug("volname length: %u", call->count);
1288 if (call->count >= AFSNAMEMAX)
1289 return afs_protocol_error(call, afs_eproto_volname_len);
1290 size = (call->count + 3) & ~3; /* It's padded */
1291 afs_extract_to_buf(call, size);
1292 call->unmarshall++;
1293 fallthrough;
1294
1295 /* extract the volume name */
1296 case 3:
1297 _debug("extract volname");
1298 ret = afs_extract_data(call, true);
1299 if (ret < 0)
1300 return ret;
1301
1302 p = call->buffer;
1303 p[call->count] = 0;
1304 _debug("volname '%s'", p);
1305 afs_extract_to_tmp(call);
1306 call->unmarshall++;
1307 fallthrough;
1308
1309 /* extract the offline message length */
1310 case 4:
1311 ret = afs_extract_data(call, true);
1312 if (ret < 0)
1313 return ret;
1314
1315 call->count = ntohl(call->tmp);
1316 _debug("offline msg length: %u", call->count);
1317 if (call->count >= AFSNAMEMAX)
1318 return afs_protocol_error(call, afs_eproto_offline_msg_len);
1319 size = (call->count + 3) & ~3; /* It's padded */
1320 afs_extract_to_buf(call, size);
1321 call->unmarshall++;
1322 fallthrough;
1323
1324 /* extract the offline message */
1325 case 5:
1326 _debug("extract offline");
1327 ret = afs_extract_data(call, true);
1328 if (ret < 0)
1329 return ret;
1330
1331 p = call->buffer;
1332 p[call->count] = 0;
1333 _debug("offline '%s'", p);
1334
1335 afs_extract_to_tmp(call);
1336 call->unmarshall++;
1337 fallthrough;
1338
1339 /* extract the message of the day length */
1340 case 6:
1341 ret = afs_extract_data(call, true);
1342 if (ret < 0)
1343 return ret;
1344
1345 call->count = ntohl(call->tmp);
1346 _debug("motd length: %u", call->count);
1347 if (call->count >= AFSNAMEMAX)
1348 return afs_protocol_error(call, afs_eproto_motd_len);
1349 size = (call->count + 3) & ~3; /* It's padded */
1350 afs_extract_to_buf(call, size);
1351 call->unmarshall++;
1352 fallthrough;
1353
1354 /* extract the message of the day */
1355 case 7:
1356 _debug("extract motd");
1357 ret = afs_extract_data(call, false);
1358 if (ret < 0)
1359 return ret;
1360
1361 p = call->buffer;
1362 p[call->count] = 0;
1363 _debug("motd '%s'", p);
1364
1365 call->unmarshall++;
1366 fallthrough;
1367
1368 case 8:
1369 break;
1370 }
1371
1372 _leave(" = 0 [done]");
1373 return 0;
1374}
1375
1376/*
1377 * YFS.GetVolumeStatus operation type
1378 */
1379static const struct afs_call_type yfs_RXYFSGetVolumeStatus = {
1380 .name = "YFS.GetVolumeStatus",
1381 .op = yfs_FS_GetVolumeStatus,
1382 .deliver = yfs_deliver_fs_get_volume_status,
1383 .destructor = afs_flat_call_destructor,
1384};
1385
1386/*
1387 * fetch the status of a volume
1388 */
1389void yfs_fs_get_volume_status(struct afs_operation *op)
1390{
1391 struct afs_vnode_param *vp = &op->file[0];
1392 struct afs_call *call;
1393 __be32 *bp;
1394
1395 _enter("");
1396
1397 call = afs_alloc_flat_call(op->net, &yfs_RXYFSGetVolumeStatus,
1398 sizeof(__be32) * 2 +
1399 sizeof(struct yfs_xdr_u64),
1400 max_t(size_t,
1401 sizeof(struct yfs_xdr_YFSFetchVolumeStatus) +
1402 sizeof(__be32),
1403 AFSOPAQUEMAX + 1));
1404 if (!call)
1405 return afs_op_nomem(op);
1406
1407 /* marshall the parameters */
1408 bp = call->request;
1409 bp = xdr_encode_u32(bp, YFSGETVOLUMESTATUS);
1410 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1411 bp = xdr_encode_u64(bp, vp->fid.vid);
1412 yfs_check_req(call, bp);
1413
1414 trace_afs_make_fs_call(call, &vp->fid);
1415 afs_make_op_call(op, call, GFP_NOFS);
1416}
1417
1418/*
1419 * YFS.SetLock operation type
1420 */
1421static const struct afs_call_type yfs_RXYFSSetLock = {
1422 .name = "YFS.SetLock",
1423 .op = yfs_FS_SetLock,
1424 .deliver = yfs_deliver_status_and_volsync,
1425 .done = afs_lock_op_done,
1426 .destructor = afs_flat_call_destructor,
1427};
1428
1429/*
1430 * YFS.ExtendLock operation type
1431 */
1432static const struct afs_call_type yfs_RXYFSExtendLock = {
1433 .name = "YFS.ExtendLock",
1434 .op = yfs_FS_ExtendLock,
1435 .deliver = yfs_deliver_status_and_volsync,
1436 .done = afs_lock_op_done,
1437 .destructor = afs_flat_call_destructor,
1438};
1439
1440/*
1441 * YFS.ReleaseLock operation type
1442 */
1443static const struct afs_call_type yfs_RXYFSReleaseLock = {
1444 .name = "YFS.ReleaseLock",
1445 .op = yfs_FS_ReleaseLock,
1446 .deliver = yfs_deliver_status_and_volsync,
1447 .destructor = afs_flat_call_destructor,
1448};
1449
1450/*
1451 * Set a lock on a file
1452 */
1453void yfs_fs_set_lock(struct afs_operation *op)
1454{
1455 struct afs_vnode_param *vp = &op->file[0];
1456 struct afs_call *call;
1457 __be32 *bp;
1458
1459 _enter("");
1460
1461 call = afs_alloc_flat_call(op->net, &yfs_RXYFSSetLock,
1462 sizeof(__be32) * 2 +
1463 sizeof(struct yfs_xdr_YFSFid) +
1464 sizeof(__be32),
1465 sizeof(struct yfs_xdr_YFSFetchStatus) +
1466 sizeof(struct yfs_xdr_YFSVolSync));
1467 if (!call)
1468 return afs_op_nomem(op);
1469
1470 /* marshall the parameters */
1471 bp = call->request;
1472 bp = xdr_encode_u32(bp, YFSSETLOCK);
1473 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1474 bp = xdr_encode_YFSFid(bp, &vp->fid);
1475 bp = xdr_encode_u32(bp, op->lock.type);
1476 yfs_check_req(call, bp);
1477
1478 trace_afs_make_fs_calli(call, &vp->fid, op->lock.type);
1479 afs_make_op_call(op, call, GFP_NOFS);
1480}
1481
1482/*
1483 * extend a lock on a file
1484 */
1485void yfs_fs_extend_lock(struct afs_operation *op)
1486{
1487 struct afs_vnode_param *vp = &op->file[0];
1488 struct afs_call *call;
1489 __be32 *bp;
1490
1491 _enter("");
1492
1493 call = afs_alloc_flat_call(op->net, &yfs_RXYFSExtendLock,
1494 sizeof(__be32) * 2 +
1495 sizeof(struct yfs_xdr_YFSFid),
1496 sizeof(struct yfs_xdr_YFSFetchStatus) +
1497 sizeof(struct yfs_xdr_YFSVolSync));
1498 if (!call)
1499 return afs_op_nomem(op);
1500
1501 /* marshall the parameters */
1502 bp = call->request;
1503 bp = xdr_encode_u32(bp, YFSEXTENDLOCK);
1504 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1505 bp = xdr_encode_YFSFid(bp, &vp->fid);
1506 yfs_check_req(call, bp);
1507
1508 trace_afs_make_fs_call(call, &vp->fid);
1509 afs_make_op_call(op, call, GFP_NOFS);
1510}
1511
1512/*
1513 * release a lock on a file
1514 */
1515void yfs_fs_release_lock(struct afs_operation *op)
1516{
1517 struct afs_vnode_param *vp = &op->file[0];
1518 struct afs_call *call;
1519 __be32 *bp;
1520
1521 _enter("");
1522
1523 call = afs_alloc_flat_call(op->net, &yfs_RXYFSReleaseLock,
1524 sizeof(__be32) * 2 +
1525 sizeof(struct yfs_xdr_YFSFid),
1526 sizeof(struct yfs_xdr_YFSFetchStatus) +
1527 sizeof(struct yfs_xdr_YFSVolSync));
1528 if (!call)
1529 return afs_op_nomem(op);
1530
1531 /* marshall the parameters */
1532 bp = call->request;
1533 bp = xdr_encode_u32(bp, YFSRELEASELOCK);
1534 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1535 bp = xdr_encode_YFSFid(bp, &vp->fid);
1536 yfs_check_req(call, bp);
1537
1538 trace_afs_make_fs_call(call, &vp->fid);
1539 afs_make_op_call(op, call, GFP_NOFS);
1540}
1541
1542/*
1543 * Deliver a reply to YFS.FetchStatus
1544 */
1545static int yfs_deliver_fs_fetch_status(struct afs_call *call)
1546{
1547 struct afs_operation *op = call->op;
1548 struct afs_vnode_param *vp = &op->file[op->fetch_status.which];
1549 const __be32 *bp;
1550 int ret;
1551
1552 ret = afs_transfer_reply(call);
1553 if (ret < 0)
1554 return ret;
1555
1556 /* unmarshall the reply once we've received all of it */
1557 bp = call->buffer;
1558 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
1559 xdr_decode_YFSCallBack(&bp, call, &vp->scb);
1560 xdr_decode_YFSVolSync(&bp, &op->volsync);
1561
1562 _leave(" = 0 [done]");
1563 return 0;
1564}
1565
1566/*
1567 * YFS.FetchStatus operation type
1568 */
1569static const struct afs_call_type yfs_RXYFSFetchStatus = {
1570 .name = "YFS.FetchStatus",
1571 .op = yfs_FS_FetchStatus,
1572 .deliver = yfs_deliver_fs_fetch_status,
1573 .destructor = afs_flat_call_destructor,
1574};
1575
1576/*
1577 * Fetch the status information for a fid without needing a vnode handle.
1578 */
1579void yfs_fs_fetch_status(struct afs_operation *op)
1580{
1581 struct afs_vnode_param *vp = &op->file[op->fetch_status.which];
1582 struct afs_call *call;
1583 __be32 *bp;
1584
1585 _enter(",%x,{%llx:%llu},,",
1586 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1587
1588 call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchStatus,
1589 sizeof(__be32) * 2 +
1590 sizeof(struct yfs_xdr_YFSFid),
1591 sizeof(struct yfs_xdr_YFSFetchStatus) +
1592 sizeof(struct yfs_xdr_YFSCallBack) +
1593 sizeof(struct yfs_xdr_YFSVolSync));
1594 if (!call)
1595 return afs_op_nomem(op);
1596
1597 /* marshall the parameters */
1598 bp = call->request;
1599 bp = xdr_encode_u32(bp, YFSFETCHSTATUS);
1600 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1601 bp = xdr_encode_YFSFid(bp, &vp->fid);
1602 yfs_check_req(call, bp);
1603
1604 trace_afs_make_fs_call(call, &vp->fid);
1605 afs_make_op_call(op, call, GFP_NOFS);
1606}
1607
1608/*
1609 * Deliver reply data to an YFS.InlineBulkStatus call
1610 */
1611static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
1612{
1613 struct afs_operation *op = call->op;
1614 struct afs_status_cb *scb;
1615 const __be32 *bp;
1616 u32 tmp;
1617 int ret;
1618
1619 _enter("{%u}", call->unmarshall);
1620
1621 switch (call->unmarshall) {
1622 case 0:
1623 afs_extract_to_tmp(call);
1624 call->unmarshall++;
1625 fallthrough;
1626
1627 /* Extract the file status count and array in two steps */
1628 case 1:
1629 _debug("extract status count");
1630 ret = afs_extract_data(call, true);
1631 if (ret < 0)
1632 return ret;
1633
1634 tmp = ntohl(call->tmp);
1635 _debug("status count: %u/%u", tmp, op->nr_files);
1636 if (tmp != op->nr_files)
1637 return afs_protocol_error(call, afs_eproto_ibulkst_count);
1638
1639 call->count = 0;
1640 call->unmarshall++;
1641 more_counts:
1642 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchStatus));
1643 fallthrough;
1644
1645 case 2:
1646 _debug("extract status array %u", call->count);
1647 ret = afs_extract_data(call, true);
1648 if (ret < 0)
1649 return ret;
1650
1651 switch (call->count) {
1652 case 0:
1653 scb = &op->file[0].scb;
1654 break;
1655 case 1:
1656 scb = &op->file[1].scb;
1657 break;
1658 default:
1659 scb = &op->more_files[call->count - 2].scb;
1660 break;
1661 }
1662
1663 bp = call->buffer;
1664 xdr_decode_YFSFetchStatus(&bp, call, scb);
1665
1666 call->count++;
1667 if (call->count < op->nr_files)
1668 goto more_counts;
1669
1670 call->count = 0;
1671 call->unmarshall++;
1672 afs_extract_to_tmp(call);
1673 fallthrough;
1674
1675 /* Extract the callback count and array in two steps */
1676 case 3:
1677 _debug("extract CB count");
1678 ret = afs_extract_data(call, true);
1679 if (ret < 0)
1680 return ret;
1681
1682 tmp = ntohl(call->tmp);
1683 _debug("CB count: %u", tmp);
1684 if (tmp != op->nr_files)
1685 return afs_protocol_error(call, afs_eproto_ibulkst_cb_count);
1686 call->count = 0;
1687 call->unmarshall++;
1688 more_cbs:
1689 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSCallBack));
1690 fallthrough;
1691
1692 case 4:
1693 _debug("extract CB array");
1694 ret = afs_extract_data(call, true);
1695 if (ret < 0)
1696 return ret;
1697
1698 _debug("unmarshall CB array");
1699 switch (call->count) {
1700 case 0:
1701 scb = &op->file[0].scb;
1702 break;
1703 case 1:
1704 scb = &op->file[1].scb;
1705 break;
1706 default:
1707 scb = &op->more_files[call->count - 2].scb;
1708 break;
1709 }
1710
1711 bp = call->buffer;
1712 xdr_decode_YFSCallBack(&bp, call, scb);
1713 call->count++;
1714 if (call->count < op->nr_files)
1715 goto more_cbs;
1716
1717 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSVolSync));
1718 call->unmarshall++;
1719 fallthrough;
1720
1721 case 5:
1722 ret = afs_extract_data(call, false);
1723 if (ret < 0)
1724 return ret;
1725
1726 bp = call->buffer;
1727 xdr_decode_YFSVolSync(&bp, &op->volsync);
1728
1729 call->unmarshall++;
1730 fallthrough;
1731
1732 case 6:
1733 break;
1734 }
1735
1736 _leave(" = 0 [done]");
1737 return 0;
1738}
1739
1740/*
1741 * FS.InlineBulkStatus operation type
1742 */
1743static const struct afs_call_type yfs_RXYFSInlineBulkStatus = {
1744 .name = "YFS.InlineBulkStatus",
1745 .op = yfs_FS_InlineBulkStatus,
1746 .deliver = yfs_deliver_fs_inline_bulk_status,
1747 .destructor = afs_flat_call_destructor,
1748};
1749
1750/*
1751 * Fetch the status information for up to 1024 files
1752 */
1753void yfs_fs_inline_bulk_status(struct afs_operation *op)
1754{
1755 struct afs_vnode_param *dvp = &op->file[0];
1756 struct afs_vnode_param *vp = &op->file[1];
1757 struct afs_call *call;
1758 __be32 *bp;
1759 int i;
1760
1761 _enter(",%x,{%llx:%llu},%u",
1762 key_serial(op->key), vp->fid.vid, vp->fid.vnode, op->nr_files);
1763
1764 call = afs_alloc_flat_call(op->net, &yfs_RXYFSInlineBulkStatus,
1765 sizeof(__be32) +
1766 sizeof(__be32) +
1767 sizeof(__be32) +
1768 sizeof(struct yfs_xdr_YFSFid) * op->nr_files,
1769 sizeof(struct yfs_xdr_YFSFetchStatus));
1770 if (!call)
1771 return afs_op_nomem(op);
1772
1773 /* marshall the parameters */
1774 bp = call->request;
1775 bp = xdr_encode_u32(bp, YFSINLINEBULKSTATUS);
1776 bp = xdr_encode_u32(bp, 0); /* RPCFlags */
1777 bp = xdr_encode_u32(bp, op->nr_files);
1778 bp = xdr_encode_YFSFid(bp, &dvp->fid);
1779 bp = xdr_encode_YFSFid(bp, &vp->fid);
1780 for (i = 0; i < op->nr_files - 2; i++)
1781 bp = xdr_encode_YFSFid(bp, &op->more_files[i].fid);
1782 yfs_check_req(call, bp);
1783
1784 trace_afs_make_fs_call(call, &vp->fid);
1785 afs_make_op_call(op, call, GFP_NOFS);
1786}
1787
1788/*
1789 * Deliver reply data to an YFS.FetchOpaqueACL.
1790 */
1791static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call)
1792{
1793 struct afs_operation *op = call->op;
1794 struct afs_vnode_param *vp = &op->file[0];
1795 struct yfs_acl *yacl = op->yacl;
1796 struct afs_acl *acl;
1797 const __be32 *bp;
1798 unsigned int size;
1799 int ret;
1800
1801 _enter("{%u}", call->unmarshall);
1802
1803 switch (call->unmarshall) {
1804 case 0:
1805 afs_extract_to_tmp(call);
1806 call->unmarshall++;
1807 fallthrough;
1808
1809 /* Extract the file ACL length */
1810 case 1:
1811 ret = afs_extract_data(call, true);
1812 if (ret < 0)
1813 return ret;
1814
1815 size = call->count2 = ntohl(call->tmp);
1816 size = round_up(size, 4);
1817
1818 if (yacl->flags & YFS_ACL_WANT_ACL) {
1819 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
1820 if (!acl)
1821 return -ENOMEM;
1822 yacl->acl = acl;
1823 acl->size = call->count2;
1824 afs_extract_begin(call, acl->data, size);
1825 } else {
1826 afs_extract_discard(call, size);
1827 }
1828 call->unmarshall++;
1829 fallthrough;
1830
1831 /* Extract the file ACL */
1832 case 2:
1833 ret = afs_extract_data(call, true);
1834 if (ret < 0)
1835 return ret;
1836
1837 afs_extract_to_tmp(call);
1838 call->unmarshall++;
1839 fallthrough;
1840
1841 /* Extract the volume ACL length */
1842 case 3:
1843 ret = afs_extract_data(call, true);
1844 if (ret < 0)
1845 return ret;
1846
1847 size = call->count2 = ntohl(call->tmp);
1848 size = round_up(size, 4);
1849
1850 if (yacl->flags & YFS_ACL_WANT_VOL_ACL) {
1851 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
1852 if (!acl)
1853 return -ENOMEM;
1854 yacl->vol_acl = acl;
1855 acl->size = call->count2;
1856 afs_extract_begin(call, acl->data, size);
1857 } else {
1858 afs_extract_discard(call, size);
1859 }
1860 call->unmarshall++;
1861 fallthrough;
1862
1863 /* Extract the volume ACL */
1864 case 4:
1865 ret = afs_extract_data(call, true);
1866 if (ret < 0)
1867 return ret;
1868
1869 afs_extract_to_buf(call,
1870 sizeof(__be32) * 2 +
1871 sizeof(struct yfs_xdr_YFSFetchStatus) +
1872 sizeof(struct yfs_xdr_YFSVolSync));
1873 call->unmarshall++;
1874 fallthrough;
1875
1876 /* extract the metadata */
1877 case 5:
1878 ret = afs_extract_data(call, false);
1879 if (ret < 0)
1880 return ret;
1881
1882 bp = call->buffer;
1883 yacl->inherit_flag = ntohl(*bp++);
1884 yacl->num_cleaned = ntohl(*bp++);
1885 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
1886 xdr_decode_YFSVolSync(&bp, &op->volsync);
1887
1888 call->unmarshall++;
1889 fallthrough;
1890
1891 case 6:
1892 break;
1893 }
1894
1895 _leave(" = 0 [done]");
1896 return 0;
1897}
1898
1899void yfs_free_opaque_acl(struct yfs_acl *yacl)
1900{
1901 if (yacl) {
1902 kfree(yacl->acl);
1903 kfree(yacl->vol_acl);
1904 kfree(yacl);
1905 }
1906}
1907
1908/*
1909 * YFS.FetchOpaqueACL operation type
1910 */
1911static const struct afs_call_type yfs_RXYFSFetchOpaqueACL = {
1912 .name = "YFS.FetchOpaqueACL",
1913 .op = yfs_FS_FetchOpaqueACL,
1914 .deliver = yfs_deliver_fs_fetch_opaque_acl,
1915 .destructor = afs_flat_call_destructor,
1916};
1917
1918/*
1919 * Fetch the YFS advanced ACLs for a file.
1920 */
1921void yfs_fs_fetch_opaque_acl(struct afs_operation *op)
1922{
1923 struct afs_vnode_param *vp = &op->file[0];
1924 struct afs_call *call;
1925 __be32 *bp;
1926
1927 _enter(",%x,{%llx:%llu},,",
1928 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1929
1930 call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchOpaqueACL,
1931 sizeof(__be32) * 2 +
1932 sizeof(struct yfs_xdr_YFSFid),
1933 sizeof(__be32) * 2 +
1934 sizeof(struct yfs_xdr_YFSFetchStatus) +
1935 sizeof(struct yfs_xdr_YFSVolSync));
1936 if (!call)
1937 return afs_op_nomem(op);
1938
1939 /* marshall the parameters */
1940 bp = call->request;
1941 bp = xdr_encode_u32(bp, YFSFETCHOPAQUEACL);
1942 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1943 bp = xdr_encode_YFSFid(bp, &vp->fid);
1944 yfs_check_req(call, bp);
1945
1946 trace_afs_make_fs_call(call, &vp->fid);
1947 afs_make_op_call(op, call, GFP_KERNEL);
1948}
1949
1950/*
1951 * YFS.StoreOpaqueACL2 operation type
1952 */
1953static const struct afs_call_type yfs_RXYFSStoreOpaqueACL2 = {
1954 .name = "YFS.StoreOpaqueACL2",
1955 .op = yfs_FS_StoreOpaqueACL2,
1956 .deliver = yfs_deliver_status_and_volsync,
1957 .destructor = afs_flat_call_destructor,
1958};
1959
1960/*
1961 * Fetch the YFS ACL for a file.
1962 */
1963void yfs_fs_store_opaque_acl2(struct afs_operation *op)
1964{
1965 struct afs_vnode_param *vp = &op->file[0];
1966 struct afs_call *call;
1967 struct afs_acl *acl = op->acl;
1968 size_t size;
1969 __be32 *bp;
1970
1971 _enter(",%x,{%llx:%llu},,",
1972 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1973
1974 size = round_up(acl->size, 4);
1975 call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreOpaqueACL2,
1976 sizeof(__be32) * 2 +
1977 sizeof(struct yfs_xdr_YFSFid) +
1978 sizeof(__be32) + size,
1979 sizeof(struct yfs_xdr_YFSFetchStatus) +
1980 sizeof(struct yfs_xdr_YFSVolSync));
1981 if (!call)
1982 return afs_op_nomem(op);
1983
1984 /* marshall the parameters */
1985 bp = call->request;
1986 bp = xdr_encode_u32(bp, YFSSTOREOPAQUEACL2);
1987 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1988 bp = xdr_encode_YFSFid(bp, &vp->fid);
1989 bp = xdr_encode_u32(bp, acl->size);
1990 memcpy(bp, acl->data, acl->size);
1991 if (acl->size != size)
1992 memset((void *)bp + acl->size, 0, size - acl->size);
1993 yfs_check_req(call, bp);
1994
1995 trace_afs_make_fs_call(call, &vp->fid);
1996 afs_make_op_call(op, call, GFP_KERNEL);
1997}