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