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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
18static const struct afs_fid afs_zero_fid;
19
20static inline void afs_use_fs_server(struct afs_call *call, struct afs_cb_interest *cbi)
21{
22 call->cbi = afs_get_cb_interest(cbi);
23}
24
25#define xdr_size(x) (sizeof(*x) / sizeof(__be32))
26
27static void xdr_decode_YFSFid(const __be32 **_bp, struct afs_fid *fid)
28{
29 const struct yfs_xdr_YFSFid *x = (const void *)*_bp;
30
31 fid->vid = xdr_to_u64(x->volume);
32 fid->vnode = xdr_to_u64(x->vnode.lo);
33 fid->vnode_hi = ntohl(x->vnode.hi);
34 fid->unique = ntohl(x->vnode.unique);
35 *_bp += xdr_size(x);
36}
37
38static __be32 *xdr_encode_u32(__be32 *bp, u32 n)
39{
40 *bp++ = htonl(n);
41 return bp;
42}
43
44static __be32 *xdr_encode_u64(__be32 *bp, u64 n)
45{
46 struct yfs_xdr_u64 *x = (void *)bp;
47
48 *x = u64_to_xdr(n);
49 return bp + xdr_size(x);
50}
51
52static __be32 *xdr_encode_YFSFid(__be32 *bp, struct afs_fid *fid)
53{
54 struct yfs_xdr_YFSFid *x = (void *)bp;
55
56 x->volume = u64_to_xdr(fid->vid);
57 x->vnode.lo = u64_to_xdr(fid->vnode);
58 x->vnode.hi = htonl(fid->vnode_hi);
59 x->vnode.unique = htonl(fid->unique);
60 return bp + xdr_size(x);
61}
62
63static size_t xdr_strlen(unsigned int len)
64{
65 return sizeof(__be32) + round_up(len, sizeof(__be32));
66}
67
68static __be32 *xdr_encode_string(__be32 *bp, const char *p, unsigned int len)
69{
70 bp = xdr_encode_u32(bp, len);
71 bp = memcpy(bp, p, len);
72 if (len & 3) {
73 unsigned int pad = 4 - (len & 3);
74
75 memset((u8 *)bp + len, 0, pad);
76 len += pad;
77 }
78
79 return bp + len / sizeof(__be32);
80}
81
82static s64 linux_to_yfs_time(const struct timespec64 *t)
83{
84 /* Convert to 100ns intervals. */
85 return (u64)t->tv_sec * 10000000 + t->tv_nsec/100;
86}
87
88static __be32 *xdr_encode_YFSStoreStatus_mode(__be32 *bp, mode_t mode)
89{
90 struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
91
92 x->mask = htonl(AFS_SET_MODE);
93 x->mode = htonl(mode & S_IALLUGO);
94 x->mtime_client = u64_to_xdr(0);
95 x->owner = u64_to_xdr(0);
96 x->group = u64_to_xdr(0);
97 return bp + xdr_size(x);
98}
99
100static __be32 *xdr_encode_YFSStoreStatus_mtime(__be32 *bp, const struct timespec64 *t)
101{
102 struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
103 s64 mtime = linux_to_yfs_time(t);
104
105 x->mask = htonl(AFS_SET_MTIME);
106 x->mode = htonl(0);
107 x->mtime_client = u64_to_xdr(mtime);
108 x->owner = u64_to_xdr(0);
109 x->group = u64_to_xdr(0);
110 return bp + xdr_size(x);
111}
112
113/*
114 * Convert a signed 100ns-resolution 64-bit time into a timespec.
115 */
116static struct timespec64 yfs_time_to_linux(s64 t)
117{
118 struct timespec64 ts;
119 u64 abs_t;
120
121 /*
122 * Unfortunately can not use normal 64 bit division on 32 bit arch, but
123 * the alternative, do_div, does not work with negative numbers so have
124 * to special case them
125 */
126 if (t < 0) {
127 abs_t = -t;
128 ts.tv_nsec = (time64_t)(do_div(abs_t, 10000000) * 100);
129 ts.tv_nsec = -ts.tv_nsec;
130 ts.tv_sec = -abs_t;
131 } else {
132 abs_t = t;
133 ts.tv_nsec = (time64_t)do_div(abs_t, 10000000) * 100;
134 ts.tv_sec = abs_t;
135 }
136
137 return ts;
138}
139
140static struct timespec64 xdr_to_time(const struct yfs_xdr_u64 xdr)
141{
142 s64 t = xdr_to_u64(xdr);
143
144 return yfs_time_to_linux(t);
145}
146
147static void yfs_check_req(struct afs_call *call, __be32 *bp)
148{
149 size_t len = (void *)bp - call->request;
150
151 if (len > call->request_size)
152 pr_err("kAFS: %s: Request buffer overflow (%zu>%u)\n",
153 call->type->name, len, call->request_size);
154 else if (len < call->request_size)
155 pr_warning("kAFS: %s: Request buffer underflow (%zu<%u)\n",
156 call->type->name, len, call->request_size);
157}
158
159/*
160 * Dump a bad file status record.
161 */
162static void xdr_dump_bad(const __be32 *bp)
163{
164 __be32 x[4];
165 int i;
166
167 pr_notice("YFS XDR: Bad status record\n");
168 for (i = 0; i < 5 * 4 * 4; i += 16) {
169 memcpy(x, bp, 16);
170 bp += 4;
171 pr_notice("%03x: %08x %08x %08x %08x\n",
172 i, ntohl(x[0]), ntohl(x[1]), ntohl(x[2]), ntohl(x[3]));
173 }
174
175 memcpy(x, bp, 4);
176 pr_notice("0x50: %08x\n", ntohl(x[0]));
177}
178
179/*
180 * Decode a YFSFetchStatus block
181 */
182static int xdr_decode_YFSFetchStatus(const __be32 **_bp,
183 struct afs_call *call,
184 struct afs_status_cb *scb)
185{
186 const struct yfs_xdr_YFSFetchStatus *xdr = (const void *)*_bp;
187 struct afs_file_status *status = &scb->status;
188 u32 type;
189
190 status->abort_code = ntohl(xdr->abort_code);
191 if (status->abort_code != 0) {
192 if (status->abort_code == VNOVNODE)
193 status->nlink = 0;
194 scb->have_error = true;
195 return 0;
196 }
197
198 type = ntohl(xdr->type);
199 switch (type) {
200 case AFS_FTYPE_FILE:
201 case AFS_FTYPE_DIR:
202 case AFS_FTYPE_SYMLINK:
203 status->type = type;
204 break;
205 default:
206 goto bad;
207 }
208
209 status->nlink = ntohl(xdr->nlink);
210 status->author = xdr_to_u64(xdr->author);
211 status->owner = xdr_to_u64(xdr->owner);
212 status->caller_access = ntohl(xdr->caller_access); /* Ticket dependent */
213 status->anon_access = ntohl(xdr->anon_access);
214 status->mode = ntohl(xdr->mode) & S_IALLUGO;
215 status->group = xdr_to_u64(xdr->group);
216 status->lock_count = ntohl(xdr->lock_count);
217
218 status->mtime_client = xdr_to_time(xdr->mtime_client);
219 status->mtime_server = xdr_to_time(xdr->mtime_server);
220 status->size = xdr_to_u64(xdr->size);
221 status->data_version = xdr_to_u64(xdr->data_version);
222 scb->have_status = true;
223
224 *_bp += xdr_size(xdr);
225 return 0;
226
227bad:
228 xdr_dump_bad(*_bp);
229 return afs_protocol_error(call, -EBADMSG, afs_eproto_bad_status);
230}
231
232/*
233 * Decode a YFSCallBack block
234 */
235static void xdr_decode_YFSCallBack(const __be32 **_bp,
236 struct afs_call *call,
237 struct afs_status_cb *scb)
238{
239 struct yfs_xdr_YFSCallBack *x = (void *)*_bp;
240 struct afs_callback *cb = &scb->callback;
241 ktime_t cb_expiry;
242
243 cb_expiry = call->reply_time;
244 cb_expiry = ktime_add(cb_expiry, xdr_to_u64(x->expiration_time) * 100);
245 cb->expires_at = ktime_divns(cb_expiry, NSEC_PER_SEC);
246 scb->have_cb = true;
247 *_bp += xdr_size(x);
248}
249
250/*
251 * Decode a YFSVolSync block
252 */
253static void xdr_decode_YFSVolSync(const __be32 **_bp,
254 struct afs_volsync *volsync)
255{
256 struct yfs_xdr_YFSVolSync *x = (void *)*_bp;
257 u64 creation;
258
259 if (volsync) {
260 creation = xdr_to_u64(x->vol_creation_date);
261 do_div(creation, 10 * 1000 * 1000);
262 volsync->creation = creation;
263 }
264
265 *_bp += xdr_size(x);
266}
267
268/*
269 * Encode the requested attributes into a YFSStoreStatus block
270 */
271static __be32 *xdr_encode_YFS_StoreStatus(__be32 *bp, struct iattr *attr)
272{
273 struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
274 s64 mtime = 0, owner = 0, group = 0;
275 u32 mask = 0, mode = 0;
276
277 mask = 0;
278 if (attr->ia_valid & ATTR_MTIME) {
279 mask |= AFS_SET_MTIME;
280 mtime = linux_to_yfs_time(&attr->ia_mtime);
281 }
282
283 if (attr->ia_valid & ATTR_UID) {
284 mask |= AFS_SET_OWNER;
285 owner = from_kuid(&init_user_ns, attr->ia_uid);
286 }
287
288 if (attr->ia_valid & ATTR_GID) {
289 mask |= AFS_SET_GROUP;
290 group = from_kgid(&init_user_ns, attr->ia_gid);
291 }
292
293 if (attr->ia_valid & ATTR_MODE) {
294 mask |= AFS_SET_MODE;
295 mode = attr->ia_mode & S_IALLUGO;
296 }
297
298 x->mask = htonl(mask);
299 x->mode = htonl(mode);
300 x->mtime_client = u64_to_xdr(mtime);
301 x->owner = u64_to_xdr(owner);
302 x->group = u64_to_xdr(group);
303 return bp + xdr_size(x);
304}
305
306/*
307 * Decode a YFSFetchVolumeStatus block.
308 */
309static void xdr_decode_YFSFetchVolumeStatus(const __be32 **_bp,
310 struct afs_volume_status *vs)
311{
312 const struct yfs_xdr_YFSFetchVolumeStatus *x = (const void *)*_bp;
313 u32 flags;
314
315 vs->vid = xdr_to_u64(x->vid);
316 vs->parent_id = xdr_to_u64(x->parent_id);
317 flags = ntohl(x->flags);
318 vs->online = flags & yfs_FVSOnline;
319 vs->in_service = flags & yfs_FVSInservice;
320 vs->blessed = flags & yfs_FVSBlessed;
321 vs->needs_salvage = flags & yfs_FVSNeedsSalvage;
322 vs->type = ntohl(x->type);
323 vs->min_quota = 0;
324 vs->max_quota = xdr_to_u64(x->max_quota);
325 vs->blocks_in_use = xdr_to_u64(x->blocks_in_use);
326 vs->part_blocks_avail = xdr_to_u64(x->part_blocks_avail);
327 vs->part_max_blocks = xdr_to_u64(x->part_max_blocks);
328 vs->vol_copy_date = xdr_to_u64(x->vol_copy_date);
329 vs->vol_backup_date = xdr_to_u64(x->vol_backup_date);
330 *_bp += sizeof(*x) / sizeof(__be32);
331}
332
333/*
334 * Deliver a reply that's a status, callback and volsync.
335 */
336static int yfs_deliver_fs_status_cb_and_volsync(struct afs_call *call)
337{
338 const __be32 *bp;
339 int ret;
340
341 ret = afs_transfer_reply(call);
342 if (ret < 0)
343 return ret;
344
345 /* unmarshall the reply once we've received all of it */
346 bp = call->buffer;
347 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
348 if (ret < 0)
349 return ret;
350 xdr_decode_YFSCallBack(&bp, call, call->out_scb);
351 xdr_decode_YFSVolSync(&bp, call->out_volsync);
352
353 _leave(" = 0 [done]");
354 return 0;
355}
356
357/*
358 * Deliver reply data to operations that just return a file status and a volume
359 * sync record.
360 */
361static int yfs_deliver_status_and_volsync(struct afs_call *call)
362{
363 const __be32 *bp;
364 int ret;
365
366 ret = afs_transfer_reply(call);
367 if (ret < 0)
368 return ret;
369
370 bp = call->buffer;
371 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
372 if (ret < 0)
373 return ret;
374 xdr_decode_YFSVolSync(&bp, call->out_volsync);
375
376 _leave(" = 0 [done]");
377 return 0;
378}
379
380/*
381 * YFS.FetchStatus operation type
382 */
383static const struct afs_call_type yfs_RXYFSFetchStatus_vnode = {
384 .name = "YFS.FetchStatus(vnode)",
385 .op = yfs_FS_FetchStatus,
386 .deliver = yfs_deliver_fs_status_cb_and_volsync,
387 .destructor = afs_flat_call_destructor,
388};
389
390/*
391 * Fetch the status information for a file.
392 */
393int yfs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_status_cb *scb,
394 struct afs_volsync *volsync)
395{
396 struct afs_vnode *vnode = fc->vnode;
397 struct afs_call *call;
398 struct afs_net *net = afs_v2net(vnode);
399 __be32 *bp;
400
401 _enter(",%x,{%llx:%llu},,",
402 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
403
404 call = afs_alloc_flat_call(net, &yfs_RXYFSFetchStatus_vnode,
405 sizeof(__be32) * 2 +
406 sizeof(struct yfs_xdr_YFSFid),
407 sizeof(struct yfs_xdr_YFSFetchStatus) +
408 sizeof(struct yfs_xdr_YFSCallBack) +
409 sizeof(struct yfs_xdr_YFSVolSync));
410 if (!call) {
411 fc->ac.error = -ENOMEM;
412 return -ENOMEM;
413 }
414
415 call->key = fc->key;
416 call->out_scb = scb;
417 call->out_volsync = volsync;
418
419 /* marshall the parameters */
420 bp = call->request;
421 bp = xdr_encode_u32(bp, YFSFETCHSTATUS);
422 bp = xdr_encode_u32(bp, 0); /* RPC flags */
423 bp = xdr_encode_YFSFid(bp, &vnode->fid);
424 yfs_check_req(call, bp);
425
426 afs_use_fs_server(call, fc->cbi);
427 trace_afs_make_fs_call(call, &vnode->fid);
428 afs_set_fc_call(call, fc);
429 afs_make_call(&fc->ac, call, GFP_NOFS);
430 return afs_wait_for_call_to_complete(call, &fc->ac);
431}
432
433/*
434 * Deliver reply data to an YFS.FetchData64.
435 */
436static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
437{
438 struct afs_read *req = call->read_request;
439 const __be32 *bp;
440 unsigned int size;
441 int ret;
442
443 _enter("{%u,%zu/%llu}",
444 call->unmarshall, iov_iter_count(&call->iter), req->actual_len);
445
446 switch (call->unmarshall) {
447 case 0:
448 req->actual_len = 0;
449 req->index = 0;
450 req->offset = req->pos & (PAGE_SIZE - 1);
451 afs_extract_to_tmp64(call);
452 call->unmarshall++;
453 /* Fall through */
454
455 /* extract the returned data length */
456 case 1:
457 _debug("extract data length");
458 ret = afs_extract_data(call, true);
459 if (ret < 0)
460 return ret;
461
462 req->actual_len = be64_to_cpu(call->tmp64);
463 _debug("DATA length: %llu", req->actual_len);
464 req->remain = min(req->len, req->actual_len);
465 if (req->remain == 0)
466 goto no_more_data;
467
468 call->unmarshall++;
469
470 begin_page:
471 ASSERTCMP(req->index, <, req->nr_pages);
472 if (req->remain > PAGE_SIZE - req->offset)
473 size = PAGE_SIZE - req->offset;
474 else
475 size = req->remain;
476 call->bvec[0].bv_len = size;
477 call->bvec[0].bv_offset = req->offset;
478 call->bvec[0].bv_page = req->pages[req->index];
479 iov_iter_bvec(&call->iter, READ, call->bvec, 1, size);
480 ASSERTCMP(size, <=, PAGE_SIZE);
481 /* Fall through */
482
483 /* extract the returned data */
484 case 2:
485 _debug("extract data %zu/%llu",
486 iov_iter_count(&call->iter), req->remain);
487
488 ret = afs_extract_data(call, true);
489 if (ret < 0)
490 return ret;
491 req->remain -= call->bvec[0].bv_len;
492 req->offset += call->bvec[0].bv_len;
493 ASSERTCMP(req->offset, <=, PAGE_SIZE);
494 if (req->offset == PAGE_SIZE) {
495 req->offset = 0;
496 if (req->page_done)
497 req->page_done(req);
498 req->index++;
499 if (req->remain > 0)
500 goto begin_page;
501 }
502
503 ASSERTCMP(req->remain, ==, 0);
504 if (req->actual_len <= req->len)
505 goto no_more_data;
506
507 /* Discard any excess data the server gave us */
508 afs_extract_discard(call, req->actual_len - req->len);
509 call->unmarshall = 3;
510 /* Fall through */
511
512 case 3:
513 _debug("extract discard %zu/%llu",
514 iov_iter_count(&call->iter), req->actual_len - req->len);
515
516 ret = afs_extract_data(call, true);
517 if (ret < 0)
518 return ret;
519
520 no_more_data:
521 call->unmarshall = 4;
522 afs_extract_to_buf(call,
523 sizeof(struct yfs_xdr_YFSFetchStatus) +
524 sizeof(struct yfs_xdr_YFSCallBack) +
525 sizeof(struct yfs_xdr_YFSVolSync));
526 /* Fall through */
527
528 /* extract the metadata */
529 case 4:
530 ret = afs_extract_data(call, false);
531 if (ret < 0)
532 return ret;
533
534 bp = call->buffer;
535 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
536 if (ret < 0)
537 return ret;
538 xdr_decode_YFSCallBack(&bp, call, call->out_scb);
539 xdr_decode_YFSVolSync(&bp, call->out_volsync);
540
541 req->data_version = call->out_scb->status.data_version;
542 req->file_size = call->out_scb->status.size;
543
544 call->unmarshall++;
545 /* Fall through */
546
547 case 5:
548 break;
549 }
550
551 for (; req->index < req->nr_pages; req->index++) {
552 if (req->offset < PAGE_SIZE)
553 zero_user_segment(req->pages[req->index],
554 req->offset, PAGE_SIZE);
555 if (req->page_done)
556 req->page_done(req);
557 req->offset = 0;
558 }
559
560 _leave(" = 0 [done]");
561 return 0;
562}
563
564static void yfs_fetch_data_destructor(struct afs_call *call)
565{
566 afs_put_read(call->read_request);
567 afs_flat_call_destructor(call);
568}
569
570/*
571 * YFS.FetchData64 operation type
572 */
573static const struct afs_call_type yfs_RXYFSFetchData64 = {
574 .name = "YFS.FetchData64",
575 .op = yfs_FS_FetchData64,
576 .deliver = yfs_deliver_fs_fetch_data64,
577 .destructor = yfs_fetch_data_destructor,
578};
579
580/*
581 * Fetch data from a file.
582 */
583int yfs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_status_cb *scb,
584 struct afs_read *req)
585{
586 struct afs_vnode *vnode = fc->vnode;
587 struct afs_call *call;
588 struct afs_net *net = afs_v2net(vnode);
589 __be32 *bp;
590
591 _enter(",%x,{%llx:%llu},%llx,%llx",
592 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode,
593 req->pos, req->len);
594
595 call = afs_alloc_flat_call(net, &yfs_RXYFSFetchData64,
596 sizeof(__be32) * 2 +
597 sizeof(struct yfs_xdr_YFSFid) +
598 sizeof(struct yfs_xdr_u64) * 2,
599 sizeof(struct yfs_xdr_YFSFetchStatus) +
600 sizeof(struct yfs_xdr_YFSCallBack) +
601 sizeof(struct yfs_xdr_YFSVolSync));
602 if (!call)
603 return -ENOMEM;
604
605 call->key = fc->key;
606 call->out_scb = scb;
607 call->out_volsync = NULL;
608 call->read_request = req;
609
610 /* marshall the parameters */
611 bp = call->request;
612 bp = xdr_encode_u32(bp, YFSFETCHDATA64);
613 bp = xdr_encode_u32(bp, 0); /* RPC flags */
614 bp = xdr_encode_YFSFid(bp, &vnode->fid);
615 bp = xdr_encode_u64(bp, req->pos);
616 bp = xdr_encode_u64(bp, req->len);
617 yfs_check_req(call, bp);
618
619 refcount_inc(&req->usage);
620 afs_use_fs_server(call, fc->cbi);
621 trace_afs_make_fs_call(call, &vnode->fid);
622 afs_set_fc_call(call, fc);
623 afs_make_call(&fc->ac, call, GFP_NOFS);
624 return afs_wait_for_call_to_complete(call, &fc->ac);
625}
626
627/*
628 * Deliver reply data for YFS.CreateFile or YFS.MakeDir.
629 */
630static int yfs_deliver_fs_create_vnode(struct afs_call *call)
631{
632 const __be32 *bp;
633 int ret;
634
635 _enter("{%u}", call->unmarshall);
636
637 ret = afs_transfer_reply(call);
638 if (ret < 0)
639 return ret;
640
641 /* unmarshall the reply once we've received all of it */
642 bp = call->buffer;
643 xdr_decode_YFSFid(&bp, call->out_fid);
644 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
645 if (ret < 0)
646 return ret;
647 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
648 if (ret < 0)
649 return ret;
650 xdr_decode_YFSCallBack(&bp, call, call->out_scb);
651 xdr_decode_YFSVolSync(&bp, call->out_volsync);
652
653 _leave(" = 0 [done]");
654 return 0;
655}
656
657/*
658 * FS.CreateFile and FS.MakeDir operation type
659 */
660static const struct afs_call_type afs_RXFSCreateFile = {
661 .name = "YFS.CreateFile",
662 .op = yfs_FS_CreateFile,
663 .deliver = yfs_deliver_fs_create_vnode,
664 .destructor = afs_flat_call_destructor,
665};
666
667/*
668 * Create a file.
669 */
670int yfs_fs_create_file(struct afs_fs_cursor *fc,
671 const char *name,
672 umode_t mode,
673 struct afs_status_cb *dvnode_scb,
674 struct afs_fid *newfid,
675 struct afs_status_cb *new_scb)
676{
677 struct afs_vnode *dvnode = fc->vnode;
678 struct afs_call *call;
679 struct afs_net *net = afs_v2net(dvnode);
680 size_t namesz, reqsz, rplsz;
681 __be32 *bp;
682
683 _enter("");
684
685 namesz = strlen(name);
686 reqsz = (sizeof(__be32) +
687 sizeof(__be32) +
688 sizeof(struct yfs_xdr_YFSFid) +
689 xdr_strlen(namesz) +
690 sizeof(struct yfs_xdr_YFSStoreStatus) +
691 sizeof(__be32));
692 rplsz = (sizeof(struct yfs_xdr_YFSFid) +
693 sizeof(struct yfs_xdr_YFSFetchStatus) +
694 sizeof(struct yfs_xdr_YFSFetchStatus) +
695 sizeof(struct yfs_xdr_YFSCallBack) +
696 sizeof(struct yfs_xdr_YFSVolSync));
697
698 call = afs_alloc_flat_call(net, &afs_RXFSCreateFile, reqsz, rplsz);
699 if (!call)
700 return -ENOMEM;
701
702 call->key = fc->key;
703 call->out_dir_scb = dvnode_scb;
704 call->out_fid = newfid;
705 call->out_scb = new_scb;
706
707 /* marshall the parameters */
708 bp = call->request;
709 bp = xdr_encode_u32(bp, YFSCREATEFILE);
710 bp = xdr_encode_u32(bp, 0); /* RPC flags */
711 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
712 bp = xdr_encode_string(bp, name, namesz);
713 bp = xdr_encode_YFSStoreStatus_mode(bp, mode);
714 bp = xdr_encode_u32(bp, yfs_LockNone); /* ViceLockType */
715 yfs_check_req(call, bp);
716
717 afs_use_fs_server(call, fc->cbi);
718 trace_afs_make_fs_call1(call, &dvnode->fid, name);
719 afs_set_fc_call(call, fc);
720 afs_make_call(&fc->ac, call, GFP_NOFS);
721 return afs_wait_for_call_to_complete(call, &fc->ac);
722}
723
724static const struct afs_call_type yfs_RXFSMakeDir = {
725 .name = "YFS.MakeDir",
726 .op = yfs_FS_MakeDir,
727 .deliver = yfs_deliver_fs_create_vnode,
728 .destructor = afs_flat_call_destructor,
729};
730
731/*
732 * Make a directory.
733 */
734int yfs_fs_make_dir(struct afs_fs_cursor *fc,
735 const char *name,
736 umode_t mode,
737 struct afs_status_cb *dvnode_scb,
738 struct afs_fid *newfid,
739 struct afs_status_cb *new_scb)
740{
741 struct afs_vnode *dvnode = fc->vnode;
742 struct afs_call *call;
743 struct afs_net *net = afs_v2net(dvnode);
744 size_t namesz, reqsz, rplsz;
745 __be32 *bp;
746
747 _enter("");
748
749 namesz = strlen(name);
750 reqsz = (sizeof(__be32) +
751 sizeof(struct yfs_xdr_RPCFlags) +
752 sizeof(struct yfs_xdr_YFSFid) +
753 xdr_strlen(namesz) +
754 sizeof(struct yfs_xdr_YFSStoreStatus));
755 rplsz = (sizeof(struct yfs_xdr_YFSFid) +
756 sizeof(struct yfs_xdr_YFSFetchStatus) +
757 sizeof(struct yfs_xdr_YFSFetchStatus) +
758 sizeof(struct yfs_xdr_YFSCallBack) +
759 sizeof(struct yfs_xdr_YFSVolSync));
760
761 call = afs_alloc_flat_call(net, &yfs_RXFSMakeDir, reqsz, rplsz);
762 if (!call)
763 return -ENOMEM;
764
765 call->key = fc->key;
766 call->out_dir_scb = dvnode_scb;
767 call->out_fid = newfid;
768 call->out_scb = new_scb;
769
770 /* marshall the parameters */
771 bp = call->request;
772 bp = xdr_encode_u32(bp, YFSMAKEDIR);
773 bp = xdr_encode_u32(bp, 0); /* RPC flags */
774 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
775 bp = xdr_encode_string(bp, name, namesz);
776 bp = xdr_encode_YFSStoreStatus_mode(bp, mode);
777 yfs_check_req(call, bp);
778
779 afs_use_fs_server(call, fc->cbi);
780 trace_afs_make_fs_call1(call, &dvnode->fid, name);
781 afs_set_fc_call(call, fc);
782 afs_make_call(&fc->ac, call, GFP_NOFS);
783 return afs_wait_for_call_to_complete(call, &fc->ac);
784}
785
786/*
787 * Deliver reply data to a YFS.RemoveFile2 operation.
788 */
789static int yfs_deliver_fs_remove_file2(struct afs_call *call)
790{
791 struct afs_fid fid;
792 const __be32 *bp;
793 int ret;
794
795 _enter("{%u}", call->unmarshall);
796
797 ret = afs_transfer_reply(call);
798 if (ret < 0)
799 return ret;
800
801 bp = call->buffer;
802 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
803 if (ret < 0)
804 return ret;
805
806 xdr_decode_YFSFid(&bp, &fid);
807 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
808 if (ret < 0)
809 return ret;
810 /* Was deleted if vnode->status.abort_code == VNOVNODE. */
811
812 xdr_decode_YFSVolSync(&bp, call->out_volsync);
813 return 0;
814}
815
816/*
817 * YFS.RemoveFile2 operation type.
818 */
819static const struct afs_call_type yfs_RXYFSRemoveFile2 = {
820 .name = "YFS.RemoveFile2",
821 .op = yfs_FS_RemoveFile2,
822 .deliver = yfs_deliver_fs_remove_file2,
823 .destructor = afs_flat_call_destructor,
824};
825
826/*
827 * Remove a file and retrieve new file status.
828 */
829int yfs_fs_remove_file2(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
830 const char *name, struct afs_status_cb *dvnode_scb,
831 struct afs_status_cb *vnode_scb)
832{
833 struct afs_vnode *dvnode = fc->vnode;
834 struct afs_call *call;
835 struct afs_net *net = afs_v2net(dvnode);
836 size_t namesz;
837 __be32 *bp;
838
839 _enter("");
840
841 namesz = strlen(name);
842
843 call = afs_alloc_flat_call(net, &yfs_RXYFSRemoveFile2,
844 sizeof(__be32) +
845 sizeof(struct yfs_xdr_RPCFlags) +
846 sizeof(struct yfs_xdr_YFSFid) +
847 xdr_strlen(namesz),
848 sizeof(struct yfs_xdr_YFSFetchStatus) +
849 sizeof(struct yfs_xdr_YFSFid) +
850 sizeof(struct yfs_xdr_YFSFetchStatus) +
851 sizeof(struct yfs_xdr_YFSVolSync));
852 if (!call)
853 return -ENOMEM;
854
855 call->key = fc->key;
856 call->out_dir_scb = dvnode_scb;
857 call->out_scb = vnode_scb;
858
859 /* marshall the parameters */
860 bp = call->request;
861 bp = xdr_encode_u32(bp, YFSREMOVEFILE2);
862 bp = xdr_encode_u32(bp, 0); /* RPC flags */
863 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
864 bp = xdr_encode_string(bp, name, namesz);
865 yfs_check_req(call, bp);
866
867 afs_use_fs_server(call, fc->cbi);
868 trace_afs_make_fs_call1(call, &dvnode->fid, name);
869 afs_set_fc_call(call, fc);
870 afs_make_call(&fc->ac, call, GFP_NOFS);
871 return afs_wait_for_call_to_complete(call, &fc->ac);
872}
873
874/*
875 * Deliver reply data to a YFS.RemoveFile or YFS.RemoveDir operation.
876 */
877static int yfs_deliver_fs_remove(struct afs_call *call)
878{
879 const __be32 *bp;
880 int ret;
881
882 _enter("{%u}", call->unmarshall);
883
884 ret = afs_transfer_reply(call);
885 if (ret < 0)
886 return ret;
887
888 bp = call->buffer;
889 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
890 if (ret < 0)
891 return ret;
892
893 xdr_decode_YFSVolSync(&bp, call->out_volsync);
894 return 0;
895}
896
897/*
898 * FS.RemoveDir and FS.RemoveFile operation types.
899 */
900static const struct afs_call_type yfs_RXYFSRemoveFile = {
901 .name = "YFS.RemoveFile",
902 .op = yfs_FS_RemoveFile,
903 .deliver = yfs_deliver_fs_remove,
904 .destructor = afs_flat_call_destructor,
905};
906
907static const struct afs_call_type yfs_RXYFSRemoveDir = {
908 .name = "YFS.RemoveDir",
909 .op = yfs_FS_RemoveDir,
910 .deliver = yfs_deliver_fs_remove,
911 .destructor = afs_flat_call_destructor,
912};
913
914/*
915 * remove a file or directory
916 */
917int yfs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
918 const char *name, bool isdir,
919 struct afs_status_cb *dvnode_scb)
920{
921 struct afs_vnode *dvnode = fc->vnode;
922 struct afs_call *call;
923 struct afs_net *net = afs_v2net(dvnode);
924 size_t namesz;
925 __be32 *bp;
926
927 _enter("");
928
929 namesz = strlen(name);
930 call = afs_alloc_flat_call(
931 net, isdir ? &yfs_RXYFSRemoveDir : &yfs_RXYFSRemoveFile,
932 sizeof(__be32) +
933 sizeof(struct yfs_xdr_RPCFlags) +
934 sizeof(struct yfs_xdr_YFSFid) +
935 xdr_strlen(namesz),
936 sizeof(struct yfs_xdr_YFSFetchStatus) +
937 sizeof(struct yfs_xdr_YFSVolSync));
938 if (!call)
939 return -ENOMEM;
940
941 call->key = fc->key;
942 call->out_dir_scb = dvnode_scb;
943
944 /* marshall the parameters */
945 bp = call->request;
946 bp = xdr_encode_u32(bp, isdir ? YFSREMOVEDIR : YFSREMOVEFILE);
947 bp = xdr_encode_u32(bp, 0); /* RPC flags */
948 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
949 bp = xdr_encode_string(bp, name, namesz);
950 yfs_check_req(call, bp);
951
952 afs_use_fs_server(call, fc->cbi);
953 trace_afs_make_fs_call1(call, &dvnode->fid, name);
954 afs_set_fc_call(call, fc);
955 afs_make_call(&fc->ac, call, GFP_NOFS);
956 return afs_wait_for_call_to_complete(call, &fc->ac);
957}
958
959/*
960 * Deliver reply data to a YFS.Link operation.
961 */
962static int yfs_deliver_fs_link(struct afs_call *call)
963{
964 const __be32 *bp;
965 int ret;
966
967 _enter("{%u}", call->unmarshall);
968
969 ret = afs_transfer_reply(call);
970 if (ret < 0)
971 return ret;
972
973 bp = call->buffer;
974 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
975 if (ret < 0)
976 return ret;
977 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
978 if (ret < 0)
979 return ret;
980 xdr_decode_YFSVolSync(&bp, call->out_volsync);
981 _leave(" = 0 [done]");
982 return 0;
983}
984
985/*
986 * YFS.Link operation type.
987 */
988static const struct afs_call_type yfs_RXYFSLink = {
989 .name = "YFS.Link",
990 .op = yfs_FS_Link,
991 .deliver = yfs_deliver_fs_link,
992 .destructor = afs_flat_call_destructor,
993};
994
995/*
996 * Make a hard link.
997 */
998int yfs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
999 const char *name,
1000 struct afs_status_cb *dvnode_scb,
1001 struct afs_status_cb *vnode_scb)
1002{
1003 struct afs_vnode *dvnode = fc->vnode;
1004 struct afs_call *call;
1005 struct afs_net *net = afs_v2net(vnode);
1006 size_t namesz;
1007 __be32 *bp;
1008
1009 _enter("");
1010
1011 namesz = strlen(name);
1012 call = afs_alloc_flat_call(net, &yfs_RXYFSLink,
1013 sizeof(__be32) +
1014 sizeof(struct yfs_xdr_RPCFlags) +
1015 sizeof(struct yfs_xdr_YFSFid) +
1016 xdr_strlen(namesz) +
1017 sizeof(struct yfs_xdr_YFSFid),
1018 sizeof(struct yfs_xdr_YFSFetchStatus) +
1019 sizeof(struct yfs_xdr_YFSFetchStatus) +
1020 sizeof(struct yfs_xdr_YFSVolSync));
1021 if (!call)
1022 return -ENOMEM;
1023
1024 call->key = fc->key;
1025 call->out_dir_scb = dvnode_scb;
1026 call->out_scb = vnode_scb;
1027
1028 /* marshall the parameters */
1029 bp = call->request;
1030 bp = xdr_encode_u32(bp, YFSLINK);
1031 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1032 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
1033 bp = xdr_encode_string(bp, name, namesz);
1034 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1035 yfs_check_req(call, bp);
1036
1037 afs_use_fs_server(call, fc->cbi);
1038 trace_afs_make_fs_call1(call, &vnode->fid, name);
1039 afs_set_fc_call(call, fc);
1040 afs_make_call(&fc->ac, call, GFP_NOFS);
1041 return afs_wait_for_call_to_complete(call, &fc->ac);
1042}
1043
1044/*
1045 * Deliver reply data to a YFS.Symlink operation.
1046 */
1047static int yfs_deliver_fs_symlink(struct afs_call *call)
1048{
1049 const __be32 *bp;
1050 int ret;
1051
1052 _enter("{%u}", call->unmarshall);
1053
1054 ret = afs_transfer_reply(call);
1055 if (ret < 0)
1056 return ret;
1057
1058 /* unmarshall the reply once we've received all of it */
1059 bp = call->buffer;
1060 xdr_decode_YFSFid(&bp, call->out_fid);
1061 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
1062 if (ret < 0)
1063 return ret;
1064 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
1065 if (ret < 0)
1066 return ret;
1067 xdr_decode_YFSVolSync(&bp, call->out_volsync);
1068
1069 _leave(" = 0 [done]");
1070 return 0;
1071}
1072
1073/*
1074 * YFS.Symlink operation type
1075 */
1076static const struct afs_call_type yfs_RXYFSSymlink = {
1077 .name = "YFS.Symlink",
1078 .op = yfs_FS_Symlink,
1079 .deliver = yfs_deliver_fs_symlink,
1080 .destructor = afs_flat_call_destructor,
1081};
1082
1083/*
1084 * Create a symbolic link.
1085 */
1086int yfs_fs_symlink(struct afs_fs_cursor *fc,
1087 const char *name,
1088 const char *contents,
1089 struct afs_status_cb *dvnode_scb,
1090 struct afs_fid *newfid,
1091 struct afs_status_cb *vnode_scb)
1092{
1093 struct afs_vnode *dvnode = fc->vnode;
1094 struct afs_call *call;
1095 struct afs_net *net = afs_v2net(dvnode);
1096 size_t namesz, contents_sz;
1097 __be32 *bp;
1098
1099 _enter("");
1100
1101 namesz = strlen(name);
1102 contents_sz = strlen(contents);
1103 call = afs_alloc_flat_call(net, &yfs_RXYFSSymlink,
1104 sizeof(__be32) +
1105 sizeof(struct yfs_xdr_RPCFlags) +
1106 sizeof(struct yfs_xdr_YFSFid) +
1107 xdr_strlen(namesz) +
1108 xdr_strlen(contents_sz) +
1109 sizeof(struct yfs_xdr_YFSStoreStatus),
1110 sizeof(struct yfs_xdr_YFSFid) +
1111 sizeof(struct yfs_xdr_YFSFetchStatus) +
1112 sizeof(struct yfs_xdr_YFSFetchStatus) +
1113 sizeof(struct yfs_xdr_YFSVolSync));
1114 if (!call)
1115 return -ENOMEM;
1116
1117 call->key = fc->key;
1118 call->out_dir_scb = dvnode_scb;
1119 call->out_fid = newfid;
1120 call->out_scb = vnode_scb;
1121
1122 /* marshall the parameters */
1123 bp = call->request;
1124 bp = xdr_encode_u32(bp, YFSSYMLINK);
1125 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1126 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
1127 bp = xdr_encode_string(bp, name, namesz);
1128 bp = xdr_encode_string(bp, contents, contents_sz);
1129 bp = xdr_encode_YFSStoreStatus_mode(bp, S_IRWXUGO);
1130 yfs_check_req(call, bp);
1131
1132 afs_use_fs_server(call, fc->cbi);
1133 trace_afs_make_fs_call1(call, &dvnode->fid, name);
1134 afs_set_fc_call(call, fc);
1135 afs_make_call(&fc->ac, call, GFP_NOFS);
1136 return afs_wait_for_call_to_complete(call, &fc->ac);
1137}
1138
1139/*
1140 * Deliver reply data to a YFS.Rename operation.
1141 */
1142static int yfs_deliver_fs_rename(struct afs_call *call)
1143{
1144 const __be32 *bp;
1145 int ret;
1146
1147 _enter("{%u}", call->unmarshall);
1148
1149 ret = afs_transfer_reply(call);
1150 if (ret < 0)
1151 return ret;
1152
1153 bp = call->buffer;
1154 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
1155 if (ret < 0)
1156 return ret;
1157 if (call->out_dir_scb != call->out_scb) {
1158 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
1159 if (ret < 0)
1160 return ret;
1161 }
1162
1163 xdr_decode_YFSVolSync(&bp, call->out_volsync);
1164 _leave(" = 0 [done]");
1165 return 0;
1166}
1167
1168/*
1169 * YFS.Rename operation type
1170 */
1171static const struct afs_call_type yfs_RXYFSRename = {
1172 .name = "FS.Rename",
1173 .op = yfs_FS_Rename,
1174 .deliver = yfs_deliver_fs_rename,
1175 .destructor = afs_flat_call_destructor,
1176};
1177
1178/*
1179 * Rename a file or directory.
1180 */
1181int yfs_fs_rename(struct afs_fs_cursor *fc,
1182 const char *orig_name,
1183 struct afs_vnode *new_dvnode,
1184 const char *new_name,
1185 struct afs_status_cb *orig_dvnode_scb,
1186 struct afs_status_cb *new_dvnode_scb)
1187{
1188 struct afs_vnode *orig_dvnode = fc->vnode;
1189 struct afs_call *call;
1190 struct afs_net *net = afs_v2net(orig_dvnode);
1191 size_t o_namesz, n_namesz;
1192 __be32 *bp;
1193
1194 _enter("");
1195
1196 o_namesz = strlen(orig_name);
1197 n_namesz = strlen(new_name);
1198 call = afs_alloc_flat_call(net, &yfs_RXYFSRename,
1199 sizeof(__be32) +
1200 sizeof(struct yfs_xdr_RPCFlags) +
1201 sizeof(struct yfs_xdr_YFSFid) +
1202 xdr_strlen(o_namesz) +
1203 sizeof(struct yfs_xdr_YFSFid) +
1204 xdr_strlen(n_namesz),
1205 sizeof(struct yfs_xdr_YFSFetchStatus) +
1206 sizeof(struct yfs_xdr_YFSFetchStatus) +
1207 sizeof(struct yfs_xdr_YFSVolSync));
1208 if (!call)
1209 return -ENOMEM;
1210
1211 call->key = fc->key;
1212 call->out_dir_scb = orig_dvnode_scb;
1213 call->out_scb = new_dvnode_scb;
1214
1215 /* marshall the parameters */
1216 bp = call->request;
1217 bp = xdr_encode_u32(bp, YFSRENAME);
1218 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1219 bp = xdr_encode_YFSFid(bp, &orig_dvnode->fid);
1220 bp = xdr_encode_string(bp, orig_name, o_namesz);
1221 bp = xdr_encode_YFSFid(bp, &new_dvnode->fid);
1222 bp = xdr_encode_string(bp, new_name, n_namesz);
1223 yfs_check_req(call, bp);
1224
1225 afs_use_fs_server(call, fc->cbi);
1226 trace_afs_make_fs_call2(call, &orig_dvnode->fid, orig_name, new_name);
1227 afs_set_fc_call(call, fc);
1228 afs_make_call(&fc->ac, call, GFP_NOFS);
1229 return afs_wait_for_call_to_complete(call, &fc->ac);
1230}
1231
1232/*
1233 * YFS.StoreData64 operation type.
1234 */
1235static const struct afs_call_type yfs_RXYFSStoreData64 = {
1236 .name = "YFS.StoreData64",
1237 .op = yfs_FS_StoreData64,
1238 .deliver = yfs_deliver_status_and_volsync,
1239 .destructor = afs_flat_call_destructor,
1240};
1241
1242/*
1243 * Store a set of pages to a large file.
1244 */
1245int yfs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping,
1246 pgoff_t first, pgoff_t last,
1247 unsigned offset, unsigned to,
1248 struct afs_status_cb *scb)
1249{
1250 struct afs_vnode *vnode = fc->vnode;
1251 struct afs_call *call;
1252 struct afs_net *net = afs_v2net(vnode);
1253 loff_t size, pos, i_size;
1254 __be32 *bp;
1255
1256 _enter(",%x,{%llx:%llu},,",
1257 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1258
1259 size = (loff_t)to - (loff_t)offset;
1260 if (first != last)
1261 size += (loff_t)(last - first) << PAGE_SHIFT;
1262 pos = (loff_t)first << PAGE_SHIFT;
1263 pos += offset;
1264
1265 i_size = i_size_read(&vnode->vfs_inode);
1266 if (pos + size > i_size)
1267 i_size = size + pos;
1268
1269 _debug("size %llx, at %llx, i_size %llx",
1270 (unsigned long long)size, (unsigned long long)pos,
1271 (unsigned long long)i_size);
1272
1273 call = afs_alloc_flat_call(net, &yfs_RXYFSStoreData64,
1274 sizeof(__be32) +
1275 sizeof(__be32) +
1276 sizeof(struct yfs_xdr_YFSFid) +
1277 sizeof(struct yfs_xdr_YFSStoreStatus) +
1278 sizeof(struct yfs_xdr_u64) * 3,
1279 sizeof(struct yfs_xdr_YFSFetchStatus) +
1280 sizeof(struct yfs_xdr_YFSVolSync));
1281 if (!call)
1282 return -ENOMEM;
1283
1284 call->key = fc->key;
1285 call->mapping = mapping;
1286 call->first = first;
1287 call->last = last;
1288 call->first_offset = offset;
1289 call->last_to = to;
1290 call->send_pages = true;
1291 call->out_scb = scb;
1292
1293 /* marshall the parameters */
1294 bp = call->request;
1295 bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1296 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1297 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1298 bp = xdr_encode_YFSStoreStatus_mtime(bp, &vnode->vfs_inode.i_mtime);
1299 bp = xdr_encode_u64(bp, pos);
1300 bp = xdr_encode_u64(bp, size);
1301 bp = xdr_encode_u64(bp, i_size);
1302 yfs_check_req(call, bp);
1303
1304 afs_use_fs_server(call, fc->cbi);
1305 trace_afs_make_fs_call(call, &vnode->fid);
1306 afs_set_fc_call(call, fc);
1307 afs_make_call(&fc->ac, call, GFP_NOFS);
1308 return afs_wait_for_call_to_complete(call, &fc->ac);
1309}
1310
1311/*
1312 * YFS.StoreStatus operation type
1313 */
1314static const struct afs_call_type yfs_RXYFSStoreStatus = {
1315 .name = "YFS.StoreStatus",
1316 .op = yfs_FS_StoreStatus,
1317 .deliver = yfs_deliver_status_and_volsync,
1318 .destructor = afs_flat_call_destructor,
1319};
1320
1321static const struct afs_call_type yfs_RXYFSStoreData64_as_Status = {
1322 .name = "YFS.StoreData64",
1323 .op = yfs_FS_StoreData64,
1324 .deliver = yfs_deliver_status_and_volsync,
1325 .destructor = afs_flat_call_destructor,
1326};
1327
1328/*
1329 * Set the attributes on a file, using YFS.StoreData64 rather than
1330 * YFS.StoreStatus so as to alter the file size also.
1331 */
1332static int yfs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr,
1333 struct afs_status_cb *scb)
1334{
1335 struct afs_vnode *vnode = fc->vnode;
1336 struct afs_call *call;
1337 struct afs_net *net = afs_v2net(vnode);
1338 __be32 *bp;
1339
1340 _enter(",%x,{%llx:%llu},,",
1341 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1342
1343 call = afs_alloc_flat_call(net, &yfs_RXYFSStoreData64_as_Status,
1344 sizeof(__be32) * 2 +
1345 sizeof(struct yfs_xdr_YFSFid) +
1346 sizeof(struct yfs_xdr_YFSStoreStatus) +
1347 sizeof(struct yfs_xdr_u64) * 3,
1348 sizeof(struct yfs_xdr_YFSFetchStatus) +
1349 sizeof(struct yfs_xdr_YFSVolSync));
1350 if (!call)
1351 return -ENOMEM;
1352
1353 call->key = fc->key;
1354 call->out_scb = scb;
1355
1356 /* marshall the parameters */
1357 bp = call->request;
1358 bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1359 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1360 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1361 bp = xdr_encode_YFS_StoreStatus(bp, attr);
1362 bp = xdr_encode_u64(bp, attr->ia_size); /* position of start of write */
1363 bp = xdr_encode_u64(bp, 0); /* size of write */
1364 bp = xdr_encode_u64(bp, attr->ia_size); /* new file length */
1365 yfs_check_req(call, bp);
1366
1367 afs_use_fs_server(call, fc->cbi);
1368 trace_afs_make_fs_call(call, &vnode->fid);
1369 afs_set_fc_call(call, fc);
1370 afs_make_call(&fc->ac, call, GFP_NOFS);
1371 return afs_wait_for_call_to_complete(call, &fc->ac);
1372}
1373
1374/*
1375 * Set the attributes on a file, using YFS.StoreData64 if there's a change in
1376 * file size, and YFS.StoreStatus otherwise.
1377 */
1378int yfs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr,
1379 struct afs_status_cb *scb)
1380{
1381 struct afs_vnode *vnode = fc->vnode;
1382 struct afs_call *call;
1383 struct afs_net *net = afs_v2net(vnode);
1384 __be32 *bp;
1385
1386 if (attr->ia_valid & ATTR_SIZE)
1387 return yfs_fs_setattr_size(fc, attr, scb);
1388
1389 _enter(",%x,{%llx:%llu},,",
1390 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1391
1392 call = afs_alloc_flat_call(net, &yfs_RXYFSStoreStatus,
1393 sizeof(__be32) * 2 +
1394 sizeof(struct yfs_xdr_YFSFid) +
1395 sizeof(struct yfs_xdr_YFSStoreStatus),
1396 sizeof(struct yfs_xdr_YFSFetchStatus) +
1397 sizeof(struct yfs_xdr_YFSVolSync));
1398 if (!call)
1399 return -ENOMEM;
1400
1401 call->key = fc->key;
1402 call->out_scb = scb;
1403
1404 /* marshall the parameters */
1405 bp = call->request;
1406 bp = xdr_encode_u32(bp, YFSSTORESTATUS);
1407 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1408 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1409 bp = xdr_encode_YFS_StoreStatus(bp, attr);
1410 yfs_check_req(call, bp);
1411
1412 afs_use_fs_server(call, fc->cbi);
1413 trace_afs_make_fs_call(call, &vnode->fid);
1414 afs_set_fc_call(call, fc);
1415 afs_make_call(&fc->ac, call, GFP_NOFS);
1416 return afs_wait_for_call_to_complete(call, &fc->ac);
1417}
1418
1419/*
1420 * Deliver reply data to a YFS.GetVolumeStatus operation.
1421 */
1422static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
1423{
1424 const __be32 *bp;
1425 char *p;
1426 u32 size;
1427 int ret;
1428
1429 _enter("{%u}", call->unmarshall);
1430
1431 switch (call->unmarshall) {
1432 case 0:
1433 call->unmarshall++;
1434 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchVolumeStatus));
1435 /* Fall through */
1436
1437 /* extract the returned status record */
1438 case 1:
1439 _debug("extract status");
1440 ret = afs_extract_data(call, true);
1441 if (ret < 0)
1442 return ret;
1443
1444 bp = call->buffer;
1445 xdr_decode_YFSFetchVolumeStatus(&bp, call->out_volstatus);
1446 call->unmarshall++;
1447 afs_extract_to_tmp(call);
1448 /* Fall through */
1449
1450 /* extract the volume name length */
1451 case 2:
1452 ret = afs_extract_data(call, true);
1453 if (ret < 0)
1454 return ret;
1455
1456 call->count = ntohl(call->tmp);
1457 _debug("volname length: %u", call->count);
1458 if (call->count >= AFSNAMEMAX)
1459 return afs_protocol_error(call, -EBADMSG,
1460 afs_eproto_volname_len);
1461 size = (call->count + 3) & ~3; /* It's padded */
1462 afs_extract_to_buf(call, size);
1463 call->unmarshall++;
1464 /* Fall through */
1465
1466 /* extract the volume name */
1467 case 3:
1468 _debug("extract volname");
1469 ret = afs_extract_data(call, true);
1470 if (ret < 0)
1471 return ret;
1472
1473 p = call->buffer;
1474 p[call->count] = 0;
1475 _debug("volname '%s'", p);
1476 afs_extract_to_tmp(call);
1477 call->unmarshall++;
1478 /* Fall through */
1479
1480 /* extract the offline message length */
1481 case 4:
1482 ret = afs_extract_data(call, true);
1483 if (ret < 0)
1484 return ret;
1485
1486 call->count = ntohl(call->tmp);
1487 _debug("offline msg length: %u", call->count);
1488 if (call->count >= AFSNAMEMAX)
1489 return afs_protocol_error(call, -EBADMSG,
1490 afs_eproto_offline_msg_len);
1491 size = (call->count + 3) & ~3; /* It's padded */
1492 afs_extract_to_buf(call, size);
1493 call->unmarshall++;
1494 /* Fall through */
1495
1496 /* extract the offline message */
1497 case 5:
1498 _debug("extract offline");
1499 ret = afs_extract_data(call, true);
1500 if (ret < 0)
1501 return ret;
1502
1503 p = call->buffer;
1504 p[call->count] = 0;
1505 _debug("offline '%s'", p);
1506
1507 afs_extract_to_tmp(call);
1508 call->unmarshall++;
1509 /* Fall through */
1510
1511 /* extract the message of the day length */
1512 case 6:
1513 ret = afs_extract_data(call, true);
1514 if (ret < 0)
1515 return ret;
1516
1517 call->count = ntohl(call->tmp);
1518 _debug("motd length: %u", call->count);
1519 if (call->count >= AFSNAMEMAX)
1520 return afs_protocol_error(call, -EBADMSG,
1521 afs_eproto_motd_len);
1522 size = (call->count + 3) & ~3; /* It's padded */
1523 afs_extract_to_buf(call, size);
1524 call->unmarshall++;
1525 /* Fall through */
1526
1527 /* extract the message of the day */
1528 case 7:
1529 _debug("extract motd");
1530 ret = afs_extract_data(call, false);
1531 if (ret < 0)
1532 return ret;
1533
1534 p = call->buffer;
1535 p[call->count] = 0;
1536 _debug("motd '%s'", p);
1537
1538 call->unmarshall++;
1539 /* Fall through */
1540
1541 case 8:
1542 break;
1543 }
1544
1545 _leave(" = 0 [done]");
1546 return 0;
1547}
1548
1549/*
1550 * YFS.GetVolumeStatus operation type
1551 */
1552static const struct afs_call_type yfs_RXYFSGetVolumeStatus = {
1553 .name = "YFS.GetVolumeStatus",
1554 .op = yfs_FS_GetVolumeStatus,
1555 .deliver = yfs_deliver_fs_get_volume_status,
1556 .destructor = afs_flat_call_destructor,
1557};
1558
1559/*
1560 * fetch the status of a volume
1561 */
1562int yfs_fs_get_volume_status(struct afs_fs_cursor *fc,
1563 struct afs_volume_status *vs)
1564{
1565 struct afs_vnode *vnode = fc->vnode;
1566 struct afs_call *call;
1567 struct afs_net *net = afs_v2net(vnode);
1568 __be32 *bp;
1569
1570 _enter("");
1571
1572 call = afs_alloc_flat_call(net, &yfs_RXYFSGetVolumeStatus,
1573 sizeof(__be32) * 2 +
1574 sizeof(struct yfs_xdr_u64),
1575 max_t(size_t,
1576 sizeof(struct yfs_xdr_YFSFetchVolumeStatus) +
1577 sizeof(__be32),
1578 AFSOPAQUEMAX + 1));
1579 if (!call)
1580 return -ENOMEM;
1581
1582 call->key = fc->key;
1583 call->out_volstatus = vs;
1584
1585 /* marshall the parameters */
1586 bp = call->request;
1587 bp = xdr_encode_u32(bp, YFSGETVOLUMESTATUS);
1588 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1589 bp = xdr_encode_u64(bp, vnode->fid.vid);
1590 yfs_check_req(call, bp);
1591
1592 afs_use_fs_server(call, fc->cbi);
1593 trace_afs_make_fs_call(call, &vnode->fid);
1594 afs_set_fc_call(call, fc);
1595 afs_make_call(&fc->ac, call, GFP_NOFS);
1596 return afs_wait_for_call_to_complete(call, &fc->ac);
1597}
1598
1599/*
1600 * YFS.SetLock operation type
1601 */
1602static const struct afs_call_type yfs_RXYFSSetLock = {
1603 .name = "YFS.SetLock",
1604 .op = yfs_FS_SetLock,
1605 .deliver = yfs_deliver_status_and_volsync,
1606 .done = afs_lock_op_done,
1607 .destructor = afs_flat_call_destructor,
1608};
1609
1610/*
1611 * YFS.ExtendLock operation type
1612 */
1613static const struct afs_call_type yfs_RXYFSExtendLock = {
1614 .name = "YFS.ExtendLock",
1615 .op = yfs_FS_ExtendLock,
1616 .deliver = yfs_deliver_status_and_volsync,
1617 .done = afs_lock_op_done,
1618 .destructor = afs_flat_call_destructor,
1619};
1620
1621/*
1622 * YFS.ReleaseLock operation type
1623 */
1624static const struct afs_call_type yfs_RXYFSReleaseLock = {
1625 .name = "YFS.ReleaseLock",
1626 .op = yfs_FS_ReleaseLock,
1627 .deliver = yfs_deliver_status_and_volsync,
1628 .destructor = afs_flat_call_destructor,
1629};
1630
1631/*
1632 * Set a lock on a file
1633 */
1634int yfs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type,
1635 struct afs_status_cb *scb)
1636{
1637 struct afs_vnode *vnode = fc->vnode;
1638 struct afs_call *call;
1639 struct afs_net *net = afs_v2net(vnode);
1640 __be32 *bp;
1641
1642 _enter("");
1643
1644 call = afs_alloc_flat_call(net, &yfs_RXYFSSetLock,
1645 sizeof(__be32) * 2 +
1646 sizeof(struct yfs_xdr_YFSFid) +
1647 sizeof(__be32),
1648 sizeof(struct yfs_xdr_YFSFetchStatus) +
1649 sizeof(struct yfs_xdr_YFSVolSync));
1650 if (!call)
1651 return -ENOMEM;
1652
1653 call->key = fc->key;
1654 call->lvnode = vnode;
1655 call->out_scb = scb;
1656
1657 /* marshall the parameters */
1658 bp = call->request;
1659 bp = xdr_encode_u32(bp, YFSSETLOCK);
1660 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1661 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1662 bp = xdr_encode_u32(bp, type);
1663 yfs_check_req(call, bp);
1664
1665 afs_use_fs_server(call, fc->cbi);
1666 trace_afs_make_fs_calli(call, &vnode->fid, type);
1667 afs_set_fc_call(call, fc);
1668 afs_make_call(&fc->ac, call, GFP_NOFS);
1669 return afs_wait_for_call_to_complete(call, &fc->ac);
1670}
1671
1672/*
1673 * extend a lock on a file
1674 */
1675int yfs_fs_extend_lock(struct afs_fs_cursor *fc, struct afs_status_cb *scb)
1676{
1677 struct afs_vnode *vnode = fc->vnode;
1678 struct afs_call *call;
1679 struct afs_net *net = afs_v2net(vnode);
1680 __be32 *bp;
1681
1682 _enter("");
1683
1684 call = afs_alloc_flat_call(net, &yfs_RXYFSExtendLock,
1685 sizeof(__be32) * 2 +
1686 sizeof(struct yfs_xdr_YFSFid),
1687 sizeof(struct yfs_xdr_YFSFetchStatus) +
1688 sizeof(struct yfs_xdr_YFSVolSync));
1689 if (!call)
1690 return -ENOMEM;
1691
1692 call->key = fc->key;
1693 call->lvnode = vnode;
1694 call->out_scb = scb;
1695
1696 /* marshall the parameters */
1697 bp = call->request;
1698 bp = xdr_encode_u32(bp, YFSEXTENDLOCK);
1699 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1700 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1701 yfs_check_req(call, bp);
1702
1703 afs_use_fs_server(call, fc->cbi);
1704 trace_afs_make_fs_call(call, &vnode->fid);
1705 afs_set_fc_call(call, fc);
1706 afs_make_call(&fc->ac, call, GFP_NOFS);
1707 return afs_wait_for_call_to_complete(call, &fc->ac);
1708}
1709
1710/*
1711 * release a lock on a file
1712 */
1713int yfs_fs_release_lock(struct afs_fs_cursor *fc, struct afs_status_cb *scb)
1714{
1715 struct afs_vnode *vnode = fc->vnode;
1716 struct afs_call *call;
1717 struct afs_net *net = afs_v2net(vnode);
1718 __be32 *bp;
1719
1720 _enter("");
1721
1722 call = afs_alloc_flat_call(net, &yfs_RXYFSReleaseLock,
1723 sizeof(__be32) * 2 +
1724 sizeof(struct yfs_xdr_YFSFid),
1725 sizeof(struct yfs_xdr_YFSFetchStatus) +
1726 sizeof(struct yfs_xdr_YFSVolSync));
1727 if (!call)
1728 return -ENOMEM;
1729
1730 call->key = fc->key;
1731 call->lvnode = vnode;
1732 call->out_scb = scb;
1733
1734 /* marshall the parameters */
1735 bp = call->request;
1736 bp = xdr_encode_u32(bp, YFSRELEASELOCK);
1737 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1738 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1739 yfs_check_req(call, bp);
1740
1741 afs_use_fs_server(call, fc->cbi);
1742 trace_afs_make_fs_call(call, &vnode->fid);
1743 afs_set_fc_call(call, fc);
1744 afs_make_call(&fc->ac, call, GFP_NOFS);
1745 return afs_wait_for_call_to_complete(call, &fc->ac);
1746}
1747
1748/*
1749 * YFS.FetchStatus operation type
1750 */
1751static const struct afs_call_type yfs_RXYFSFetchStatus = {
1752 .name = "YFS.FetchStatus",
1753 .op = yfs_FS_FetchStatus,
1754 .deliver = yfs_deliver_fs_status_cb_and_volsync,
1755 .destructor = afs_flat_call_destructor,
1756};
1757
1758/*
1759 * Fetch the status information for a fid without needing a vnode handle.
1760 */
1761int yfs_fs_fetch_status(struct afs_fs_cursor *fc,
1762 struct afs_net *net,
1763 struct afs_fid *fid,
1764 struct afs_status_cb *scb,
1765 struct afs_volsync *volsync)
1766{
1767 struct afs_call *call;
1768 __be32 *bp;
1769
1770 _enter(",%x,{%llx:%llu},,",
1771 key_serial(fc->key), fid->vid, fid->vnode);
1772
1773 call = afs_alloc_flat_call(net, &yfs_RXYFSFetchStatus,
1774 sizeof(__be32) * 2 +
1775 sizeof(struct yfs_xdr_YFSFid),
1776 sizeof(struct yfs_xdr_YFSFetchStatus) +
1777 sizeof(struct yfs_xdr_YFSCallBack) +
1778 sizeof(struct yfs_xdr_YFSVolSync));
1779 if (!call) {
1780 fc->ac.error = -ENOMEM;
1781 return -ENOMEM;
1782 }
1783
1784 call->key = fc->key;
1785 call->out_scb = scb;
1786 call->out_volsync = volsync;
1787
1788 /* marshall the parameters */
1789 bp = call->request;
1790 bp = xdr_encode_u32(bp, YFSFETCHSTATUS);
1791 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1792 bp = xdr_encode_YFSFid(bp, fid);
1793 yfs_check_req(call, bp);
1794
1795 afs_use_fs_server(call, fc->cbi);
1796 trace_afs_make_fs_call(call, fid);
1797 afs_set_fc_call(call, fc);
1798 afs_make_call(&fc->ac, call, GFP_NOFS);
1799 return afs_wait_for_call_to_complete(call, &fc->ac);
1800}
1801
1802/*
1803 * Deliver reply data to an YFS.InlineBulkStatus call
1804 */
1805static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
1806{
1807 struct afs_status_cb *scb;
1808 const __be32 *bp;
1809 u32 tmp;
1810 int ret;
1811
1812 _enter("{%u}", call->unmarshall);
1813
1814 switch (call->unmarshall) {
1815 case 0:
1816 afs_extract_to_tmp(call);
1817 call->unmarshall++;
1818 /* Fall through */
1819
1820 /* Extract the file status count and array in two steps */
1821 case 1:
1822 _debug("extract status count");
1823 ret = afs_extract_data(call, true);
1824 if (ret < 0)
1825 return ret;
1826
1827 tmp = ntohl(call->tmp);
1828 _debug("status count: %u/%u", tmp, call->count2);
1829 if (tmp != call->count2)
1830 return afs_protocol_error(call, -EBADMSG,
1831 afs_eproto_ibulkst_count);
1832
1833 call->count = 0;
1834 call->unmarshall++;
1835 more_counts:
1836 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchStatus));
1837 /* Fall through */
1838
1839 case 2:
1840 _debug("extract status array %u", call->count);
1841 ret = afs_extract_data(call, true);
1842 if (ret < 0)
1843 return ret;
1844
1845 bp = call->buffer;
1846 scb = &call->out_scb[call->count];
1847 ret = xdr_decode_YFSFetchStatus(&bp, call, scb);
1848 if (ret < 0)
1849 return ret;
1850
1851 call->count++;
1852 if (call->count < call->count2)
1853 goto more_counts;
1854
1855 call->count = 0;
1856 call->unmarshall++;
1857 afs_extract_to_tmp(call);
1858 /* Fall through */
1859
1860 /* Extract the callback count and array in two steps */
1861 case 3:
1862 _debug("extract CB count");
1863 ret = afs_extract_data(call, true);
1864 if (ret < 0)
1865 return ret;
1866
1867 tmp = ntohl(call->tmp);
1868 _debug("CB count: %u", tmp);
1869 if (tmp != call->count2)
1870 return afs_protocol_error(call, -EBADMSG,
1871 afs_eproto_ibulkst_cb_count);
1872 call->count = 0;
1873 call->unmarshall++;
1874 more_cbs:
1875 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSCallBack));
1876 /* Fall through */
1877
1878 case 4:
1879 _debug("extract CB array");
1880 ret = afs_extract_data(call, true);
1881 if (ret < 0)
1882 return ret;
1883
1884 _debug("unmarshall CB array");
1885 bp = call->buffer;
1886 scb = &call->out_scb[call->count];
1887 xdr_decode_YFSCallBack(&bp, call, scb);
1888 call->count++;
1889 if (call->count < call->count2)
1890 goto more_cbs;
1891
1892 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSVolSync));
1893 call->unmarshall++;
1894 /* Fall through */
1895
1896 case 5:
1897 ret = afs_extract_data(call, false);
1898 if (ret < 0)
1899 return ret;
1900
1901 bp = call->buffer;
1902 xdr_decode_YFSVolSync(&bp, call->out_volsync);
1903
1904 call->unmarshall++;
1905 /* Fall through */
1906
1907 case 6:
1908 break;
1909 }
1910
1911 _leave(" = 0 [done]");
1912 return 0;
1913}
1914
1915/*
1916 * FS.InlineBulkStatus operation type
1917 */
1918static const struct afs_call_type yfs_RXYFSInlineBulkStatus = {
1919 .name = "YFS.InlineBulkStatus",
1920 .op = yfs_FS_InlineBulkStatus,
1921 .deliver = yfs_deliver_fs_inline_bulk_status,
1922 .destructor = afs_flat_call_destructor,
1923};
1924
1925/*
1926 * Fetch the status information for up to 1024 files
1927 */
1928int yfs_fs_inline_bulk_status(struct afs_fs_cursor *fc,
1929 struct afs_net *net,
1930 struct afs_fid *fids,
1931 struct afs_status_cb *statuses,
1932 unsigned int nr_fids,
1933 struct afs_volsync *volsync)
1934{
1935 struct afs_call *call;
1936 __be32 *bp;
1937 int i;
1938
1939 _enter(",%x,{%llx:%llu},%u",
1940 key_serial(fc->key), fids[0].vid, fids[1].vnode, nr_fids);
1941
1942 call = afs_alloc_flat_call(net, &yfs_RXYFSInlineBulkStatus,
1943 sizeof(__be32) +
1944 sizeof(__be32) +
1945 sizeof(__be32) +
1946 sizeof(struct yfs_xdr_YFSFid) * nr_fids,
1947 sizeof(struct yfs_xdr_YFSFetchStatus));
1948 if (!call) {
1949 fc->ac.error = -ENOMEM;
1950 return -ENOMEM;
1951 }
1952
1953 call->key = fc->key;
1954 call->out_scb = statuses;
1955 call->out_volsync = volsync;
1956 call->count2 = nr_fids;
1957
1958 /* marshall the parameters */
1959 bp = call->request;
1960 bp = xdr_encode_u32(bp, YFSINLINEBULKSTATUS);
1961 bp = xdr_encode_u32(bp, 0); /* RPCFlags */
1962 bp = xdr_encode_u32(bp, nr_fids);
1963 for (i = 0; i < nr_fids; i++)
1964 bp = xdr_encode_YFSFid(bp, &fids[i]);
1965 yfs_check_req(call, bp);
1966
1967 afs_use_fs_server(call, fc->cbi);
1968 trace_afs_make_fs_call(call, &fids[0]);
1969 afs_set_fc_call(call, fc);
1970 afs_make_call(&fc->ac, call, GFP_NOFS);
1971 return afs_wait_for_call_to_complete(call, &fc->ac);
1972}
1973
1974/*
1975 * Deliver reply data to an YFS.FetchOpaqueACL.
1976 */
1977static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call)
1978{
1979 struct yfs_acl *yacl = call->out_yacl;
1980 struct afs_acl *acl;
1981 const __be32 *bp;
1982 unsigned int size;
1983 int ret;
1984
1985 _enter("{%u}", call->unmarshall);
1986
1987 switch (call->unmarshall) {
1988 case 0:
1989 afs_extract_to_tmp(call);
1990 call->unmarshall++;
1991 /* Fall through */
1992
1993 /* Extract the file ACL length */
1994 case 1:
1995 ret = afs_extract_data(call, true);
1996 if (ret < 0)
1997 return ret;
1998
1999 size = call->count2 = ntohl(call->tmp);
2000 size = round_up(size, 4);
2001
2002 if (yacl->flags & YFS_ACL_WANT_ACL) {
2003 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
2004 if (!acl)
2005 return -ENOMEM;
2006 yacl->acl = acl;
2007 acl->size = call->count2;
2008 afs_extract_begin(call, acl->data, size);
2009 } else {
2010 afs_extract_discard(call, size);
2011 }
2012 call->unmarshall++;
2013 /* Fall through */
2014
2015 /* Extract the file ACL */
2016 case 2:
2017 ret = afs_extract_data(call, true);
2018 if (ret < 0)
2019 return ret;
2020
2021 afs_extract_to_tmp(call);
2022 call->unmarshall++;
2023 /* Fall through */
2024
2025 /* Extract the volume ACL length */
2026 case 3:
2027 ret = afs_extract_data(call, true);
2028 if (ret < 0)
2029 return ret;
2030
2031 size = call->count2 = ntohl(call->tmp);
2032 size = round_up(size, 4);
2033
2034 if (yacl->flags & YFS_ACL_WANT_VOL_ACL) {
2035 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
2036 if (!acl)
2037 return -ENOMEM;
2038 yacl->vol_acl = acl;
2039 acl->size = call->count2;
2040 afs_extract_begin(call, acl->data, size);
2041 } else {
2042 afs_extract_discard(call, size);
2043 }
2044 call->unmarshall++;
2045 /* Fall through */
2046
2047 /* Extract the volume ACL */
2048 case 4:
2049 ret = afs_extract_data(call, true);
2050 if (ret < 0)
2051 return ret;
2052
2053 afs_extract_to_buf(call,
2054 sizeof(__be32) * 2 +
2055 sizeof(struct yfs_xdr_YFSFetchStatus) +
2056 sizeof(struct yfs_xdr_YFSVolSync));
2057 call->unmarshall++;
2058 /* Fall through */
2059
2060 /* extract the metadata */
2061 case 5:
2062 ret = afs_extract_data(call, false);
2063 if (ret < 0)
2064 return ret;
2065
2066 bp = call->buffer;
2067 yacl->inherit_flag = ntohl(*bp++);
2068 yacl->num_cleaned = ntohl(*bp++);
2069 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
2070 if (ret < 0)
2071 return ret;
2072 xdr_decode_YFSVolSync(&bp, call->out_volsync);
2073
2074 call->unmarshall++;
2075 /* Fall through */
2076
2077 case 6:
2078 break;
2079 }
2080
2081 _leave(" = 0 [done]");
2082 return 0;
2083}
2084
2085void yfs_free_opaque_acl(struct yfs_acl *yacl)
2086{
2087 if (yacl) {
2088 kfree(yacl->acl);
2089 kfree(yacl->vol_acl);
2090 kfree(yacl);
2091 }
2092}
2093
2094/*
2095 * YFS.FetchOpaqueACL operation type
2096 */
2097static const struct afs_call_type yfs_RXYFSFetchOpaqueACL = {
2098 .name = "YFS.FetchOpaqueACL",
2099 .op = yfs_FS_FetchOpaqueACL,
2100 .deliver = yfs_deliver_fs_fetch_opaque_acl,
2101 .destructor = afs_flat_call_destructor,
2102};
2103
2104/*
2105 * Fetch the YFS advanced ACLs for a file.
2106 */
2107struct yfs_acl *yfs_fs_fetch_opaque_acl(struct afs_fs_cursor *fc,
2108 struct yfs_acl *yacl,
2109 struct afs_status_cb *scb)
2110{
2111 struct afs_vnode *vnode = fc->vnode;
2112 struct afs_call *call;
2113 struct afs_net *net = afs_v2net(vnode);
2114 __be32 *bp;
2115
2116 _enter(",%x,{%llx:%llu},,",
2117 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
2118
2119 call = afs_alloc_flat_call(net, &yfs_RXYFSFetchOpaqueACL,
2120 sizeof(__be32) * 2 +
2121 sizeof(struct yfs_xdr_YFSFid),
2122 sizeof(__be32) * 2 +
2123 sizeof(struct yfs_xdr_YFSFetchStatus) +
2124 sizeof(struct yfs_xdr_YFSVolSync));
2125 if (!call) {
2126 fc->ac.error = -ENOMEM;
2127 return ERR_PTR(-ENOMEM);
2128 }
2129
2130 call->key = fc->key;
2131 call->out_yacl = yacl;
2132 call->out_scb = scb;
2133 call->out_volsync = NULL;
2134
2135 /* marshall the parameters */
2136 bp = call->request;
2137 bp = xdr_encode_u32(bp, YFSFETCHOPAQUEACL);
2138 bp = xdr_encode_u32(bp, 0); /* RPC flags */
2139 bp = xdr_encode_YFSFid(bp, &vnode->fid);
2140 yfs_check_req(call, bp);
2141
2142 afs_use_fs_server(call, fc->cbi);
2143 trace_afs_make_fs_call(call, &vnode->fid);
2144 afs_make_call(&fc->ac, call, GFP_KERNEL);
2145 return (struct yfs_acl *)afs_wait_for_call_to_complete(call, &fc->ac);
2146}
2147
2148/*
2149 * YFS.StoreOpaqueACL2 operation type
2150 */
2151static const struct afs_call_type yfs_RXYFSStoreOpaqueACL2 = {
2152 .name = "YFS.StoreOpaqueACL2",
2153 .op = yfs_FS_StoreOpaqueACL2,
2154 .deliver = yfs_deliver_status_and_volsync,
2155 .destructor = afs_flat_call_destructor,
2156};
2157
2158/*
2159 * Fetch the YFS ACL for a file.
2160 */
2161int yfs_fs_store_opaque_acl2(struct afs_fs_cursor *fc, const struct afs_acl *acl,
2162 struct afs_status_cb *scb)
2163{
2164 struct afs_vnode *vnode = fc->vnode;
2165 struct afs_call *call;
2166 struct afs_net *net = afs_v2net(vnode);
2167 size_t size;
2168 __be32 *bp;
2169
2170 _enter(",%x,{%llx:%llu},,",
2171 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
2172
2173 size = round_up(acl->size, 4);
2174 call = afs_alloc_flat_call(net, &yfs_RXYFSStoreOpaqueACL2,
2175 sizeof(__be32) * 2 +
2176 sizeof(struct yfs_xdr_YFSFid) +
2177 sizeof(__be32) + size,
2178 sizeof(struct yfs_xdr_YFSFetchStatus) +
2179 sizeof(struct yfs_xdr_YFSVolSync));
2180 if (!call) {
2181 fc->ac.error = -ENOMEM;
2182 return -ENOMEM;
2183 }
2184
2185 call->key = fc->key;
2186 call->out_scb = scb;
2187 call->out_volsync = NULL;
2188
2189 /* marshall the parameters */
2190 bp = call->request;
2191 bp = xdr_encode_u32(bp, YFSSTOREOPAQUEACL2);
2192 bp = xdr_encode_u32(bp, 0); /* RPC flags */
2193 bp = xdr_encode_YFSFid(bp, &vnode->fid);
2194 bp = xdr_encode_u32(bp, acl->size);
2195 memcpy(bp, acl->data, acl->size);
2196 if (acl->size != size)
2197 memset((void *)bp + acl->size, 0, size - acl->size);
2198 yfs_check_req(call, bp);
2199
2200 trace_afs_make_fs_call(call, &vnode->fid);
2201 afs_make_call(&fc->ac, call, GFP_KERNEL);
2202 return afs_wait_for_call_to_complete(call, &fc->ac);
2203}