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drm/panthor: Don't add write fences to the shared BOs
[drm/drm-misc.git] / fs / afs / yfsclient.c
blob024227aba4cd5f42a84df8297a2aae1b36089e8e
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
20 static 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
31 static __be32 *xdr_encode_u32(__be32 *bp, u32 n)
32 {
33 *bp++ = htonl(n);
34 return bp;
35 }
36
37 static __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
45 static __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
56 static size_t xdr_strlen(unsigned int len)
57 {
58 return sizeof(__be32) + round_up(len, sizeof(__be32));
59 }
60
61 static __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
75 static __be32 *xdr_encode_name(__be32 *bp, const struct qstr *p)
76 {
77 return xdr_encode_string(bp, p->name, p->len);
78 }
79
80 static 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
86 static __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 */
107 static 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
131 static 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
138 static 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 */
153 static 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 */
173 static 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;
214 advance:
215 *_bp += xdr_size(xdr);
216 return;
217
218 bad:
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 */
227 static 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 */
244 static 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 */
265 static __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 */
303 static 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 */
331 static 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 */
352 static 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 */
459 static 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 */
469 void 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 */
509 static 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 */
538 static 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 */
548 void 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
589 static 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 */
599 void 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 */
641 static 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
666 static void yfs_done_fs_remove_file2(struct afs_call *call)
667 {
668 if (call->error == -ECONNABORTED &&
669 call->abort_code == RX_INVALID_OPERATION) {
670 set_bit(AFS_SERVER_FL_NO_RM2, &call->server->flags);
671 call->op->flags |= AFS_OPERATION_DOWNGRADE;
672 }
673 }
674
675 /*
676 * YFS.RemoveFile2 operation type.
677 */
678 static const struct afs_call_type yfs_RXYFSRemoveFile2 = {
679 .name = "YFS.RemoveFile2",
680 .op = yfs_FS_RemoveFile2,
681 .deliver = yfs_deliver_fs_remove_file2,
682 .done = yfs_done_fs_remove_file2,
683 .destructor = afs_flat_call_destructor,
684 };
685
686 /*
687 * Remove a file and retrieve new file status.
688 */
689 void yfs_fs_remove_file2(struct afs_operation *op)
690 {
691 struct afs_vnode_param *dvp = &op->file[0];
692 const struct qstr *name = &op->dentry->d_name;
693 struct afs_call *call;
694 __be32 *bp;
695
696 _enter("");
697
698 call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveFile2,
699 sizeof(__be32) +
700 sizeof(struct yfs_xdr_RPCFlags) +
701 sizeof(struct yfs_xdr_YFSFid) +
702 xdr_strlen(name->len),
703 sizeof(struct yfs_xdr_YFSFetchStatus) +
704 sizeof(struct yfs_xdr_YFSFid) +
705 sizeof(struct yfs_xdr_YFSFetchStatus) +
706 sizeof(struct yfs_xdr_YFSVolSync));
707 if (!call)
708 return afs_op_nomem(op);
709
710 /* marshall the parameters */
711 bp = call->request;
712 bp = xdr_encode_u32(bp, YFSREMOVEFILE2);
713 bp = xdr_encode_u32(bp, 0); /* RPC flags */
714 bp = xdr_encode_YFSFid(bp, &dvp->fid);
715 bp = xdr_encode_name(bp, name);
716 yfs_check_req(call, bp);
717
718 call->fid = dvp->fid;
719 trace_afs_make_fs_call1(call, &dvp->fid, name);
720 afs_make_op_call(op, call, GFP_NOFS);
721 }
722
723 /*
724 * Deliver reply data to a YFS.RemoveFile or YFS.RemoveDir operation.
725 */
726 static int yfs_deliver_fs_remove(struct afs_call *call)
727 {
728 struct afs_operation *op = call->op;
729 struct afs_vnode_param *dvp = &op->file[0];
730 const __be32 *bp;
731 int ret;
732
733 _enter("{%u}", call->unmarshall);
734
735 ret = afs_transfer_reply(call);
736 if (ret < 0)
737 return ret;
738
739 bp = call->buffer;
740 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
741 xdr_decode_YFSVolSync(&bp, &op->volsync);
742 return 0;
743 }
744
745 /*
746 * FS.RemoveDir and FS.RemoveFile operation types.
747 */
748 static const struct afs_call_type yfs_RXYFSRemoveFile = {
749 .name = "YFS.RemoveFile",
750 .op = yfs_FS_RemoveFile,
751 .deliver = yfs_deliver_fs_remove,
752 .destructor = afs_flat_call_destructor,
753 };
754
755 /*
756 * Remove a file.
757 */
758 void yfs_fs_remove_file(struct afs_operation *op)
759 {
760 const struct qstr *name = &op->dentry->d_name;
761 struct afs_vnode_param *dvp = &op->file[0];
762 struct afs_call *call;
763 __be32 *bp;
764
765 _enter("");
766
767 if (!test_bit(AFS_SERVER_FL_NO_RM2, &op->server->flags))
768 return yfs_fs_remove_file2(op);
769
770 call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveFile,
771 sizeof(__be32) +
772 sizeof(struct yfs_xdr_RPCFlags) +
773 sizeof(struct yfs_xdr_YFSFid) +
774 xdr_strlen(name->len),
775 sizeof(struct yfs_xdr_YFSFetchStatus) +
776 sizeof(struct yfs_xdr_YFSVolSync));
777 if (!call)
778 return afs_op_nomem(op);
779
780 /* marshall the parameters */
781 bp = call->request;
782 bp = xdr_encode_u32(bp, YFSREMOVEFILE);
783 bp = xdr_encode_u32(bp, 0); /* RPC flags */
784 bp = xdr_encode_YFSFid(bp, &dvp->fid);
785 bp = xdr_encode_name(bp, name);
786 yfs_check_req(call, bp);
787
788 call->fid = dvp->fid;
789 trace_afs_make_fs_call1(call, &dvp->fid, name);
790 afs_make_op_call(op, call, GFP_NOFS);
791 }
792
793 static const struct afs_call_type yfs_RXYFSRemoveDir = {
794 .name = "YFS.RemoveDir",
795 .op = yfs_FS_RemoveDir,
796 .deliver = yfs_deliver_fs_remove,
797 .destructor = afs_flat_call_destructor,
798 };
799
800 /*
801 * Remove a directory.
802 */
803 void yfs_fs_remove_dir(struct afs_operation *op)
804 {
805 const struct qstr *name = &op->dentry->d_name;
806 struct afs_vnode_param *dvp = &op->file[0];
807 struct afs_call *call;
808 __be32 *bp;
809
810 _enter("");
811
812 call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveDir,
813 sizeof(__be32) +
814 sizeof(struct yfs_xdr_RPCFlags) +
815 sizeof(struct yfs_xdr_YFSFid) +
816 xdr_strlen(name->len),
817 sizeof(struct yfs_xdr_YFSFetchStatus) +
818 sizeof(struct yfs_xdr_YFSVolSync));
819 if (!call)
820 return afs_op_nomem(op);
821
822 /* marshall the parameters */
823 bp = call->request;
824 bp = xdr_encode_u32(bp, YFSREMOVEDIR);
825 bp = xdr_encode_u32(bp, 0); /* RPC flags */
826 bp = xdr_encode_YFSFid(bp, &dvp->fid);
827 bp = xdr_encode_name(bp, name);
828 yfs_check_req(call, bp);
829
830 call->fid = dvp->fid;
831 trace_afs_make_fs_call1(call, &dvp->fid, name);
832 afs_make_op_call(op, call, GFP_NOFS);
833 }
834
835 /*
836 * Deliver reply data to a YFS.Link operation.
837 */
838 static int yfs_deliver_fs_link(struct afs_call *call)
839 {
840 struct afs_operation *op = call->op;
841 struct afs_vnode_param *dvp = &op->file[0];
842 struct afs_vnode_param *vp = &op->file[1];
843 const __be32 *bp;
844 int ret;
845
846 _enter("{%u}", call->unmarshall);
847
848 ret = afs_transfer_reply(call);
849 if (ret < 0)
850 return ret;
851
852 bp = call->buffer;
853 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
854 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
855 xdr_decode_YFSVolSync(&bp, &op->volsync);
856 _leave(" = 0 [done]");
857 return 0;
858 }
859
860 /*
861 * YFS.Link operation type.
862 */
863 static const struct afs_call_type yfs_RXYFSLink = {
864 .name = "YFS.Link",
865 .op = yfs_FS_Link,
866 .deliver = yfs_deliver_fs_link,
867 .destructor = afs_flat_call_destructor,
868 };
869
870 /*
871 * Make a hard link.
872 */
873 void yfs_fs_link(struct afs_operation *op)
874 {
875 const struct qstr *name = &op->dentry->d_name;
876 struct afs_vnode_param *dvp = &op->file[0];
877 struct afs_vnode_param *vp = &op->file[1];
878 struct afs_call *call;
879 __be32 *bp;
880
881 _enter("");
882
883 call = afs_alloc_flat_call(op->net, &yfs_RXYFSLink,
884 sizeof(__be32) +
885 sizeof(struct yfs_xdr_RPCFlags) +
886 sizeof(struct yfs_xdr_YFSFid) +
887 xdr_strlen(name->len) +
888 sizeof(struct yfs_xdr_YFSFid),
889 sizeof(struct yfs_xdr_YFSFetchStatus) +
890 sizeof(struct yfs_xdr_YFSFetchStatus) +
891 sizeof(struct yfs_xdr_YFSVolSync));
892 if (!call)
893 return afs_op_nomem(op);
894
895 /* marshall the parameters */
896 bp = call->request;
897 bp = xdr_encode_u32(bp, YFSLINK);
898 bp = xdr_encode_u32(bp, 0); /* RPC flags */
899 bp = xdr_encode_YFSFid(bp, &dvp->fid);
900 bp = xdr_encode_name(bp, name);
901 bp = xdr_encode_YFSFid(bp, &vp->fid);
902 yfs_check_req(call, bp);
903
904 call->fid = vp->fid;
905 trace_afs_make_fs_call1(call, &vp->fid, name);
906 afs_make_op_call(op, call, GFP_NOFS);
907 }
908
909 /*
910 * Deliver reply data to a YFS.Symlink operation.
911 */
912 static int yfs_deliver_fs_symlink(struct afs_call *call)
913 {
914 struct afs_operation *op = call->op;
915 struct afs_vnode_param *dvp = &op->file[0];
916 struct afs_vnode_param *vp = &op->file[1];
917 const __be32 *bp;
918 int ret;
919
920 _enter("{%u}", call->unmarshall);
921
922 ret = afs_transfer_reply(call);
923 if (ret < 0)
924 return ret;
925
926 /* unmarshall the reply once we've received all of it */
927 bp = call->buffer;
928 xdr_decode_YFSFid(&bp, &vp->fid);
929 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
930 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
931 xdr_decode_YFSVolSync(&bp, &op->volsync);
932
933 _leave(" = 0 [done]");
934 return 0;
935 }
936
937 /*
938 * YFS.Symlink operation type
939 */
940 static const struct afs_call_type yfs_RXYFSSymlink = {
941 .name = "YFS.Symlink",
942 .op = yfs_FS_Symlink,
943 .deliver = yfs_deliver_fs_symlink,
944 .destructor = afs_flat_call_destructor,
945 };
946
947 /*
948 * Create a symbolic link.
949 */
950 void yfs_fs_symlink(struct afs_operation *op)
951 {
952 const struct qstr *name = &op->dentry->d_name;
953 struct afs_vnode_param *dvp = &op->file[0];
954 struct afs_call *call;
955 size_t contents_sz;
956 mode_t mode = 0777;
957 __be32 *bp;
958
959 _enter("");
960
961 contents_sz = strlen(op->create.symlink);
962 call = afs_alloc_flat_call(op->net, &yfs_RXYFSSymlink,
963 sizeof(__be32) +
964 sizeof(struct yfs_xdr_RPCFlags) +
965 sizeof(struct yfs_xdr_YFSFid) +
966 xdr_strlen(name->len) +
967 xdr_strlen(contents_sz) +
968 sizeof(struct yfs_xdr_YFSStoreStatus),
969 sizeof(struct yfs_xdr_YFSFid) +
970 sizeof(struct yfs_xdr_YFSFetchStatus) +
971 sizeof(struct yfs_xdr_YFSFetchStatus) +
972 sizeof(struct yfs_xdr_YFSVolSync));
973 if (!call)
974 return afs_op_nomem(op);
975
976 /* marshall the parameters */
977 bp = call->request;
978 bp = xdr_encode_u32(bp, YFSSYMLINK);
979 bp = xdr_encode_u32(bp, 0); /* RPC flags */
980 bp = xdr_encode_YFSFid(bp, &dvp->fid);
981 bp = xdr_encode_name(bp, name);
982 bp = xdr_encode_string(bp, op->create.symlink, contents_sz);
983 bp = xdr_encode_YFSStoreStatus(bp, &mode, &op->mtime);
984 yfs_check_req(call, bp);
985
986 call->fid = dvp->fid;
987 trace_afs_make_fs_call1(call, &dvp->fid, name);
988 afs_make_op_call(op, call, GFP_NOFS);
989 }
990
991 /*
992 * Deliver reply data to a YFS.Rename operation.
993 */
994 static int yfs_deliver_fs_rename(struct afs_call *call)
995 {
996 struct afs_operation *op = call->op;
997 struct afs_vnode_param *orig_dvp = &op->file[0];
998 struct afs_vnode_param *new_dvp = &op->file[1];
999 const __be32 *bp;
1000 int ret;
1001
1002 _enter("{%u}", call->unmarshall);
1003
1004 ret = afs_transfer_reply(call);
1005 if (ret < 0)
1006 return ret;
1007
1008 bp = call->buffer;
1009 /* If the two dirs are the same, we have two copies of the same status
1010 * report, so we just decode it twice.
1011 */
1012 xdr_decode_YFSFetchStatus(&bp, call, &orig_dvp->scb);
1013 xdr_decode_YFSFetchStatus(&bp, call, &new_dvp->scb);
1014 xdr_decode_YFSVolSync(&bp, &op->volsync);
1015 _leave(" = 0 [done]");
1016 return 0;
1017 }
1018
1019 /*
1020 * YFS.Rename operation type
1021 */
1022 static const struct afs_call_type yfs_RXYFSRename = {
1023 .name = "FS.Rename",
1024 .op = yfs_FS_Rename,
1025 .deliver = yfs_deliver_fs_rename,
1026 .destructor = afs_flat_call_destructor,
1027 };
1028
1029 /*
1030 * Rename a file or directory.
1031 */
1032 void yfs_fs_rename(struct afs_operation *op)
1033 {
1034 struct afs_vnode_param *orig_dvp = &op->file[0];
1035 struct afs_vnode_param *new_dvp = &op->file[1];
1036 const struct qstr *orig_name = &op->dentry->d_name;
1037 const struct qstr *new_name = &op->dentry_2->d_name;
1038 struct afs_call *call;
1039 __be32 *bp;
1040
1041 _enter("");
1042
1043 call = afs_alloc_flat_call(op->net, &yfs_RXYFSRename,
1044 sizeof(__be32) +
1045 sizeof(struct yfs_xdr_RPCFlags) +
1046 sizeof(struct yfs_xdr_YFSFid) +
1047 xdr_strlen(orig_name->len) +
1048 sizeof(struct yfs_xdr_YFSFid) +
1049 xdr_strlen(new_name->len),
1050 sizeof(struct yfs_xdr_YFSFetchStatus) +
1051 sizeof(struct yfs_xdr_YFSFetchStatus) +
1052 sizeof(struct yfs_xdr_YFSVolSync));
1053 if (!call)
1054 return afs_op_nomem(op);
1055
1056 /* marshall the parameters */
1057 bp = call->request;
1058 bp = xdr_encode_u32(bp, YFSRENAME);
1059 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1060 bp = xdr_encode_YFSFid(bp, &orig_dvp->fid);
1061 bp = xdr_encode_name(bp, orig_name);
1062 bp = xdr_encode_YFSFid(bp, &new_dvp->fid);
1063 bp = xdr_encode_name(bp, new_name);
1064 yfs_check_req(call, bp);
1065
1066 call->fid = orig_dvp->fid;
1067 trace_afs_make_fs_call2(call, &orig_dvp->fid, orig_name, new_name);
1068 afs_make_op_call(op, call, GFP_NOFS);
1069 }
1070
1071 /*
1072 * YFS.StoreData64 operation type.
1073 */
1074 static const struct afs_call_type yfs_RXYFSStoreData64 = {
1075 .name = "YFS.StoreData64",
1076 .op = yfs_FS_StoreData64,
1077 .deliver = yfs_deliver_status_and_volsync,
1078 .destructor = afs_flat_call_destructor,
1079 };
1080
1081 /*
1082 * Store a set of pages to a large file.
1083 */
1084 void yfs_fs_store_data(struct afs_operation *op)
1085 {
1086 struct afs_vnode_param *vp = &op->file[0];
1087 struct afs_call *call;
1088 __be32 *bp;
1089
1090 _enter(",%x,{%llx:%llu},,",
1091 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1092
1093 _debug("size %llx, at %llx, i_size %llx",
1094 (unsigned long long)op->store.size,
1095 (unsigned long long)op->store.pos,
1096 (unsigned long long)op->store.i_size);
1097
1098 call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreData64,
1099 sizeof(__be32) +
1100 sizeof(__be32) +
1101 sizeof(struct yfs_xdr_YFSFid) +
1102 sizeof(struct yfs_xdr_YFSStoreStatus) +
1103 sizeof(struct yfs_xdr_u64) * 3,
1104 sizeof(struct yfs_xdr_YFSFetchStatus) +
1105 sizeof(struct yfs_xdr_YFSVolSync));
1106 if (!call)
1107 return afs_op_nomem(op);
1108
1109 call->write_iter = op->store.write_iter;
1110
1111 /* marshall the parameters */
1112 bp = call->request;
1113 bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1114 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1115 bp = xdr_encode_YFSFid(bp, &vp->fid);
1116 bp = xdr_encode_YFSStoreStatus(bp, NULL, &op->mtime);
1117 bp = xdr_encode_u64(bp, op->store.pos);
1118 bp = xdr_encode_u64(bp, op->store.size);
1119 bp = xdr_encode_u64(bp, op->store.i_size);
1120 yfs_check_req(call, bp);
1121
1122 call->fid = vp->fid;
1123 trace_afs_make_fs_call(call, &vp->fid);
1124 afs_make_op_call(op, call, GFP_NOFS);
1125 }
1126
1127 /*
1128 * YFS.StoreStatus operation type
1129 */
1130 static const struct afs_call_type yfs_RXYFSStoreStatus = {
1131 .name = "YFS.StoreStatus",
1132 .op = yfs_FS_StoreStatus,
1133 .deliver = yfs_deliver_status_and_volsync,
1134 .destructor = afs_flat_call_destructor,
1135 };
1136
1137 static const struct afs_call_type yfs_RXYFSStoreData64_as_Status = {
1138 .name = "YFS.StoreData64",
1139 .op = yfs_FS_StoreData64,
1140 .deliver = yfs_deliver_status_and_volsync,
1141 .destructor = afs_flat_call_destructor,
1142 };
1143
1144 /*
1145 * Set the attributes on a file, using YFS.StoreData64 rather than
1146 * YFS.StoreStatus so as to alter the file size also.
1147 */
1148 static void yfs_fs_setattr_size(struct afs_operation *op)
1149 {
1150 struct afs_vnode_param *vp = &op->file[0];
1151 struct afs_call *call;
1152 struct iattr *attr = op->setattr.attr;
1153 __be32 *bp;
1154
1155 _enter(",%x,{%llx:%llu},,",
1156 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1157
1158 call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreData64_as_Status,
1159 sizeof(__be32) * 2 +
1160 sizeof(struct yfs_xdr_YFSFid) +
1161 sizeof(struct yfs_xdr_YFSStoreStatus) +
1162 sizeof(struct yfs_xdr_u64) * 3,
1163 sizeof(struct yfs_xdr_YFSFetchStatus) +
1164 sizeof(struct yfs_xdr_YFSVolSync));
1165 if (!call)
1166 return afs_op_nomem(op);
1167
1168 /* marshall the parameters */
1169 bp = call->request;
1170 bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1171 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1172 bp = xdr_encode_YFSFid(bp, &vp->fid);
1173 bp = xdr_encode_YFS_StoreStatus(bp, attr);
1174 bp = xdr_encode_u64(bp, attr->ia_size); /* position of start of write */
1175 bp = xdr_encode_u64(bp, 0); /* size of write */
1176 bp = xdr_encode_u64(bp, attr->ia_size); /* new file length */
1177 yfs_check_req(call, bp);
1178
1179 call->fid = vp->fid;
1180 trace_afs_make_fs_call(call, &vp->fid);
1181 afs_make_op_call(op, call, GFP_NOFS);
1182 }
1183
1184 /*
1185 * Set the attributes on a file, using YFS.StoreData64 if there's a change in
1186 * file size, and YFS.StoreStatus otherwise.
1187 */
1188 void yfs_fs_setattr(struct afs_operation *op)
1189 {
1190 struct afs_vnode_param *vp = &op->file[0];
1191 struct afs_call *call;
1192 struct iattr *attr = op->setattr.attr;
1193 __be32 *bp;
1194
1195 if (attr->ia_valid & ATTR_SIZE)
1196 return yfs_fs_setattr_size(op);
1197
1198 _enter(",%x,{%llx:%llu},,",
1199 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1200
1201 call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreStatus,
1202 sizeof(__be32) * 2 +
1203 sizeof(struct yfs_xdr_YFSFid) +
1204 sizeof(struct yfs_xdr_YFSStoreStatus),
1205 sizeof(struct yfs_xdr_YFSFetchStatus) +
1206 sizeof(struct yfs_xdr_YFSVolSync));
1207 if (!call)
1208 return afs_op_nomem(op);
1209
1210 /* marshall the parameters */
1211 bp = call->request;
1212 bp = xdr_encode_u32(bp, YFSSTORESTATUS);
1213 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1214 bp = xdr_encode_YFSFid(bp, &vp->fid);
1215 bp = xdr_encode_YFS_StoreStatus(bp, attr);
1216 yfs_check_req(call, bp);
1217
1218 call->fid = vp->fid;
1219 trace_afs_make_fs_call(call, &vp->fid);
1220 afs_make_op_call(op, call, GFP_NOFS);
1221 }
1222
1223 /*
1224 * Deliver reply data to a YFS.GetVolumeStatus operation.
1225 */
1226 static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
1227 {
1228 struct afs_operation *op = call->op;
1229 const __be32 *bp;
1230 char *p;
1231 u32 size;
1232 int ret;
1233
1234 _enter("{%u}", call->unmarshall);
1235
1236 switch (call->unmarshall) {
1237 case 0:
1238 call->unmarshall++;
1239 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchVolumeStatus));
1240 fallthrough;
1241
1242 /* extract the returned status record */
1243 case 1:
1244 _debug("extract status");
1245 ret = afs_extract_data(call, true);
1246 if (ret < 0)
1247 return ret;
1248
1249 bp = call->buffer;
1250 xdr_decode_YFSFetchVolumeStatus(&bp, &op->volstatus.vs);
1251 call->unmarshall++;
1252 afs_extract_to_tmp(call);
1253 fallthrough;
1254
1255 /* extract the volume name length */
1256 case 2:
1257 ret = afs_extract_data(call, true);
1258 if (ret < 0)
1259 return ret;
1260
1261 call->count = ntohl(call->tmp);
1262 _debug("volname length: %u", call->count);
1263 if (call->count >= AFSNAMEMAX)
1264 return afs_protocol_error(call, afs_eproto_volname_len);
1265 size = (call->count + 3) & ~3; /* It's padded */
1266 afs_extract_to_buf(call, size);
1267 call->unmarshall++;
1268 fallthrough;
1269
1270 /* extract the volume name */
1271 case 3:
1272 _debug("extract volname");
1273 ret = afs_extract_data(call, true);
1274 if (ret < 0)
1275 return ret;
1276
1277 p = call->buffer;
1278 p[call->count] = 0;
1279 _debug("volname '%s'", p);
1280 afs_extract_to_tmp(call);
1281 call->unmarshall++;
1282 fallthrough;
1283
1284 /* extract the offline message length */
1285 case 4:
1286 ret = afs_extract_data(call, true);
1287 if (ret < 0)
1288 return ret;
1289
1290 call->count = ntohl(call->tmp);
1291 _debug("offline msg length: %u", call->count);
1292 if (call->count >= AFSNAMEMAX)
1293 return afs_protocol_error(call, afs_eproto_offline_msg_len);
1294 size = (call->count + 3) & ~3; /* It's padded */
1295 afs_extract_to_buf(call, size);
1296 call->unmarshall++;
1297 fallthrough;
1298
1299 /* extract the offline message */
1300 case 5:
1301 _debug("extract offline");
1302 ret = afs_extract_data(call, true);
1303 if (ret < 0)
1304 return ret;
1305
1306 p = call->buffer;
1307 p[call->count] = 0;
1308 _debug("offline '%s'", p);
1309
1310 afs_extract_to_tmp(call);
1311 call->unmarshall++;
1312 fallthrough;
1313
1314 /* extract the message of the day length */
1315 case 6:
1316 ret = afs_extract_data(call, true);
1317 if (ret < 0)
1318 return ret;
1319
1320 call->count = ntohl(call->tmp);
1321 _debug("motd length: %u", call->count);
1322 if (call->count >= AFSNAMEMAX)
1323 return afs_protocol_error(call, afs_eproto_motd_len);
1324 size = (call->count + 3) & ~3; /* It's padded */
1325 afs_extract_to_buf(call, size);
1326 call->unmarshall++;
1327 fallthrough;
1328
1329 /* extract the message of the day */
1330 case 7:
1331 _debug("extract motd");
1332 ret = afs_extract_data(call, false);
1333 if (ret < 0)
1334 return ret;
1335
1336 p = call->buffer;
1337 p[call->count] = 0;
1338 _debug("motd '%s'", p);
1339
1340 call->unmarshall++;
1341 fallthrough;
1342
1343 case 8:
1344 break;
1345 }
1346
1347 _leave(" = 0 [done]");
1348 return 0;
1349 }
1350
1351 /*
1352 * YFS.GetVolumeStatus operation type
1353 */
1354 static const struct afs_call_type yfs_RXYFSGetVolumeStatus = {
1355 .name = "YFS.GetVolumeStatus",
1356 .op = yfs_FS_GetVolumeStatus,
1357 .deliver = yfs_deliver_fs_get_volume_status,
1358 .destructor = afs_flat_call_destructor,
1359 };
1360
1361 /*
1362 * fetch the status of a volume
1363 */
1364 void yfs_fs_get_volume_status(struct afs_operation *op)
1365 {
1366 struct afs_vnode_param *vp = &op->file[0];
1367 struct afs_call *call;
1368 __be32 *bp;
1369
1370 _enter("");
1371
1372 call = afs_alloc_flat_call(op->net, &yfs_RXYFSGetVolumeStatus,
1373 sizeof(__be32) * 2 +
1374 sizeof(struct yfs_xdr_u64),
1375 max_t(size_t,
1376 sizeof(struct yfs_xdr_YFSFetchVolumeStatus) +
1377 sizeof(__be32),
1378 AFSOPAQUEMAX + 1));
1379 if (!call)
1380 return afs_op_nomem(op);
1381
1382 /* marshall the parameters */
1383 bp = call->request;
1384 bp = xdr_encode_u32(bp, YFSGETVOLUMESTATUS);
1385 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1386 bp = xdr_encode_u64(bp, vp->fid.vid);
1387 yfs_check_req(call, bp);
1388
1389 call->fid = vp->fid;
1390 trace_afs_make_fs_call(call, &vp->fid);
1391 afs_make_op_call(op, call, GFP_NOFS);
1392 }
1393
1394 /*
1395 * YFS.SetLock operation type
1396 */
1397 static const struct afs_call_type yfs_RXYFSSetLock = {
1398 .name = "YFS.SetLock",
1399 .op = yfs_FS_SetLock,
1400 .deliver = yfs_deliver_status_and_volsync,
1401 .done = afs_lock_op_done,
1402 .destructor = afs_flat_call_destructor,
1403 };
1404
1405 /*
1406 * YFS.ExtendLock operation type
1407 */
1408 static const struct afs_call_type yfs_RXYFSExtendLock = {
1409 .name = "YFS.ExtendLock",
1410 .op = yfs_FS_ExtendLock,
1411 .deliver = yfs_deliver_status_and_volsync,
1412 .done = afs_lock_op_done,
1413 .destructor = afs_flat_call_destructor,
1414 };
1415
1416 /*
1417 * YFS.ReleaseLock operation type
1418 */
1419 static const struct afs_call_type yfs_RXYFSReleaseLock = {
1420 .name = "YFS.ReleaseLock",
1421 .op = yfs_FS_ReleaseLock,
1422 .deliver = yfs_deliver_status_and_volsync,
1423 .destructor = afs_flat_call_destructor,
1424 };
1425
1426 /*
1427 * Set a lock on a file
1428 */
1429 void yfs_fs_set_lock(struct afs_operation *op)
1430 {
1431 struct afs_vnode_param *vp = &op->file[0];
1432 struct afs_call *call;
1433 __be32 *bp;
1434
1435 _enter("");
1436
1437 call = afs_alloc_flat_call(op->net, &yfs_RXYFSSetLock,
1438 sizeof(__be32) * 2 +
1439 sizeof(struct yfs_xdr_YFSFid) +
1440 sizeof(__be32),
1441 sizeof(struct yfs_xdr_YFSFetchStatus) +
1442 sizeof(struct yfs_xdr_YFSVolSync));
1443 if (!call)
1444 return afs_op_nomem(op);
1445
1446 /* marshall the parameters */
1447 bp = call->request;
1448 bp = xdr_encode_u32(bp, YFSSETLOCK);
1449 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1450 bp = xdr_encode_YFSFid(bp, &vp->fid);
1451 bp = xdr_encode_u32(bp, op->lock.type);
1452 yfs_check_req(call, bp);
1453
1454 call->fid = vp->fid;
1455 trace_afs_make_fs_calli(call, &vp->fid, op->lock.type);
1456 afs_make_op_call(op, call, GFP_NOFS);
1457 }
1458
1459 /*
1460 * extend a lock on a file
1461 */
1462 void yfs_fs_extend_lock(struct afs_operation *op)
1463 {
1464 struct afs_vnode_param *vp = &op->file[0];
1465 struct afs_call *call;
1466 __be32 *bp;
1467
1468 _enter("");
1469
1470 call = afs_alloc_flat_call(op->net, &yfs_RXYFSExtendLock,
1471 sizeof(__be32) * 2 +
1472 sizeof(struct yfs_xdr_YFSFid),
1473 sizeof(struct yfs_xdr_YFSFetchStatus) +
1474 sizeof(struct yfs_xdr_YFSVolSync));
1475 if (!call)
1476 return afs_op_nomem(op);
1477
1478 /* marshall the parameters */
1479 bp = call->request;
1480 bp = xdr_encode_u32(bp, YFSEXTENDLOCK);
1481 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1482 bp = xdr_encode_YFSFid(bp, &vp->fid);
1483 yfs_check_req(call, bp);
1484
1485 call->fid = vp->fid;
1486 trace_afs_make_fs_call(call, &vp->fid);
1487 afs_make_op_call(op, call, GFP_NOFS);
1488 }
1489
1490 /*
1491 * release a lock on a file
1492 */
1493 void yfs_fs_release_lock(struct afs_operation *op)
1494 {
1495 struct afs_vnode_param *vp = &op->file[0];
1496 struct afs_call *call;
1497 __be32 *bp;
1498
1499 _enter("");
1500
1501 call = afs_alloc_flat_call(op->net, &yfs_RXYFSReleaseLock,
1502 sizeof(__be32) * 2 +
1503 sizeof(struct yfs_xdr_YFSFid),
1504 sizeof(struct yfs_xdr_YFSFetchStatus) +
1505 sizeof(struct yfs_xdr_YFSVolSync));
1506 if (!call)
1507 return afs_op_nomem(op);
1508
1509 /* marshall the parameters */
1510 bp = call->request;
1511 bp = xdr_encode_u32(bp, YFSRELEASELOCK);
1512 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1513 bp = xdr_encode_YFSFid(bp, &vp->fid);
1514 yfs_check_req(call, bp);
1515
1516 call->fid = vp->fid;
1517 trace_afs_make_fs_call(call, &vp->fid);
1518 afs_make_op_call(op, call, GFP_NOFS);
1519 }
1520
1521 /*
1522 * Deliver a reply to YFS.FetchStatus
1523 */
1524 static int yfs_deliver_fs_fetch_status(struct afs_call *call)
1525 {
1526 struct afs_operation *op = call->op;
1527 struct afs_vnode_param *vp = &op->file[op->fetch_status.which];
1528 const __be32 *bp;
1529 int ret;
1530
1531 ret = afs_transfer_reply(call);
1532 if (ret < 0)
1533 return ret;
1534
1535 /* unmarshall the reply once we've received all of it */
1536 bp = call->buffer;
1537 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
1538 xdr_decode_YFSCallBack(&bp, call, &vp->scb);
1539 xdr_decode_YFSVolSync(&bp, &op->volsync);
1540
1541 _leave(" = 0 [done]");
1542 return 0;
1543 }
1544
1545 /*
1546 * YFS.FetchStatus operation type
1547 */
1548 static const struct afs_call_type yfs_RXYFSFetchStatus = {
1549 .name = "YFS.FetchStatus",
1550 .op = yfs_FS_FetchStatus,
1551 .deliver = yfs_deliver_fs_fetch_status,
1552 .destructor = afs_flat_call_destructor,
1553 };
1554
1555 /*
1556 * Fetch the status information for a fid without needing a vnode handle.
1557 */
1558 void yfs_fs_fetch_status(struct afs_operation *op)
1559 {
1560 struct afs_vnode_param *vp = &op->file[op->fetch_status.which];
1561 struct afs_call *call;
1562 __be32 *bp;
1563
1564 _enter(",%x,{%llx:%llu},,",
1565 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1566
1567 call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchStatus,
1568 sizeof(__be32) * 2 +
1569 sizeof(struct yfs_xdr_YFSFid),
1570 sizeof(struct yfs_xdr_YFSFetchStatus) +
1571 sizeof(struct yfs_xdr_YFSCallBack) +
1572 sizeof(struct yfs_xdr_YFSVolSync));
1573 if (!call)
1574 return afs_op_nomem(op);
1575
1576 /* marshall the parameters */
1577 bp = call->request;
1578 bp = xdr_encode_u32(bp, YFSFETCHSTATUS);
1579 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1580 bp = xdr_encode_YFSFid(bp, &vp->fid);
1581 yfs_check_req(call, bp);
1582
1583 call->fid = vp->fid;
1584 trace_afs_make_fs_call(call, &vp->fid);
1585 afs_make_op_call(op, call, GFP_NOFS);
1586 }
1587
1588 /*
1589 * Deliver reply data to an YFS.InlineBulkStatus call
1590 */
1591 static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
1592 {
1593 struct afs_operation *op = call->op;
1594 struct afs_status_cb *scb;
1595 const __be32 *bp;
1596 u32 tmp;
1597 int ret;
1598
1599 _enter("{%u}", call->unmarshall);
1600
1601 switch (call->unmarshall) {
1602 case 0:
1603 afs_extract_to_tmp(call);
1604 call->unmarshall++;
1605 fallthrough;
1606
1607 /* Extract the file status count and array in two steps */
1608 case 1:
1609 _debug("extract status count");
1610 ret = afs_extract_data(call, true);
1611 if (ret < 0)
1612 return ret;
1613
1614 tmp = ntohl(call->tmp);
1615 _debug("status count: %u/%u", tmp, op->nr_files);
1616 if (tmp != op->nr_files)
1617 return afs_protocol_error(call, afs_eproto_ibulkst_count);
1618
1619 call->count = 0;
1620 call->unmarshall++;
1621 more_counts:
1622 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchStatus));
1623 fallthrough;
1624
1625 case 2:
1626 _debug("extract status array %u", call->count);
1627 ret = afs_extract_data(call, true);
1628 if (ret < 0)
1629 return ret;
1630
1631 switch (call->count) {
1632 case 0:
1633 scb = &op->file[0].scb;
1634 break;
1635 case 1:
1636 scb = &op->file[1].scb;
1637 break;
1638 default:
1639 scb = &op->more_files[call->count - 2].scb;
1640 break;
1641 }
1642
1643 bp = call->buffer;
1644 xdr_decode_YFSFetchStatus(&bp, call, scb);
1645
1646 call->count++;
1647 if (call->count < op->nr_files)
1648 goto more_counts;
1649
1650 call->count = 0;
1651 call->unmarshall++;
1652 afs_extract_to_tmp(call);
1653 fallthrough;
1654
1655 /* Extract the callback count and array in two steps */
1656 case 3:
1657 _debug("extract CB count");
1658 ret = afs_extract_data(call, true);
1659 if (ret < 0)
1660 return ret;
1661
1662 tmp = ntohl(call->tmp);
1663 _debug("CB count: %u", tmp);
1664 if (tmp != op->nr_files)
1665 return afs_protocol_error(call, afs_eproto_ibulkst_cb_count);
1666 call->count = 0;
1667 call->unmarshall++;
1668 more_cbs:
1669 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSCallBack));
1670 fallthrough;
1671
1672 case 4:
1673 _debug("extract CB array");
1674 ret = afs_extract_data(call, true);
1675 if (ret < 0)
1676 return ret;
1677
1678 _debug("unmarshall CB array");
1679 switch (call->count) {
1680 case 0:
1681 scb = &op->file[0].scb;
1682 break;
1683 case 1:
1684 scb = &op->file[1].scb;
1685 break;
1686 default:
1687 scb = &op->more_files[call->count - 2].scb;
1688 break;
1689 }
1690
1691 bp = call->buffer;
1692 xdr_decode_YFSCallBack(&bp, call, scb);
1693 call->count++;
1694 if (call->count < op->nr_files)
1695 goto more_cbs;
1696
1697 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSVolSync));
1698 call->unmarshall++;
1699 fallthrough;
1700
1701 case 5:
1702 ret = afs_extract_data(call, false);
1703 if (ret < 0)
1704 return ret;
1705
1706 bp = call->buffer;
1707 xdr_decode_YFSVolSync(&bp, &op->volsync);
1708
1709 call->unmarshall++;
1710 fallthrough;
1711
1712 case 6:
1713 break;
1714 }
1715
1716 _leave(" = 0 [done]");
1717 return 0;
1718 }
1719
1720 /*
1721 * FS.InlineBulkStatus operation type
1722 */
1723 static const struct afs_call_type yfs_RXYFSInlineBulkStatus = {
1724 .name = "YFS.InlineBulkStatus",
1725 .op = yfs_FS_InlineBulkStatus,
1726 .deliver = yfs_deliver_fs_inline_bulk_status,
1727 .destructor = afs_flat_call_destructor,
1728 };
1729
1730 /*
1731 * Fetch the status information for up to 1024 files
1732 */
1733 void yfs_fs_inline_bulk_status(struct afs_operation *op)
1734 {
1735 struct afs_vnode_param *dvp = &op->file[0];
1736 struct afs_vnode_param *vp = &op->file[1];
1737 struct afs_call *call;
1738 __be32 *bp;
1739 int i;
1740
1741 _enter(",%x,{%llx:%llu},%u",
1742 key_serial(op->key), vp->fid.vid, vp->fid.vnode, op->nr_files);
1743
1744 call = afs_alloc_flat_call(op->net, &yfs_RXYFSInlineBulkStatus,
1745 sizeof(__be32) +
1746 sizeof(__be32) +
1747 sizeof(__be32) +
1748 sizeof(struct yfs_xdr_YFSFid) * op->nr_files,
1749 sizeof(struct yfs_xdr_YFSFetchStatus));
1750 if (!call)
1751 return afs_op_nomem(op);
1752
1753 /* marshall the parameters */
1754 bp = call->request;
1755 bp = xdr_encode_u32(bp, YFSINLINEBULKSTATUS);
1756 bp = xdr_encode_u32(bp, 0); /* RPCFlags */
1757 bp = xdr_encode_u32(bp, op->nr_files);
1758 bp = xdr_encode_YFSFid(bp, &dvp->fid);
1759 bp = xdr_encode_YFSFid(bp, &vp->fid);
1760 for (i = 0; i < op->nr_files - 2; i++)
1761 bp = xdr_encode_YFSFid(bp, &op->more_files[i].fid);
1762 yfs_check_req(call, bp);
1763
1764 call->fid = vp->fid;
1765 trace_afs_make_fs_call(call, &vp->fid);
1766 afs_make_op_call(op, call, GFP_NOFS);
1767 }
1768
1769 /*
1770 * Deliver reply data to an YFS.FetchOpaqueACL.
1771 */
1772 static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call)
1773 {
1774 struct afs_operation *op = call->op;
1775 struct afs_vnode_param *vp = &op->file[0];
1776 struct yfs_acl *yacl = op->yacl;
1777 struct afs_acl *acl;
1778 const __be32 *bp;
1779 unsigned int size;
1780 int ret;
1781
1782 _enter("{%u}", call->unmarshall);
1783
1784 switch (call->unmarshall) {
1785 case 0:
1786 afs_extract_to_tmp(call);
1787 call->unmarshall++;
1788 fallthrough;
1789
1790 /* Extract the file ACL length */
1791 case 1:
1792 ret = afs_extract_data(call, true);
1793 if (ret < 0)
1794 return ret;
1795
1796 size = call->count2 = ntohl(call->tmp);
1797 size = round_up(size, 4);
1798
1799 if (yacl->flags & YFS_ACL_WANT_ACL) {
1800 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
1801 if (!acl)
1802 return -ENOMEM;
1803 yacl->acl = acl;
1804 acl->size = call->count2;
1805 afs_extract_begin(call, acl->data, size);
1806 } else {
1807 afs_extract_discard(call, size);
1808 }
1809 call->unmarshall++;
1810 fallthrough;
1811
1812 /* Extract the file ACL */
1813 case 2:
1814 ret = afs_extract_data(call, true);
1815 if (ret < 0)
1816 return ret;
1817
1818 afs_extract_to_tmp(call);
1819 call->unmarshall++;
1820 fallthrough;
1821
1822 /* Extract the volume ACL length */
1823 case 3:
1824 ret = afs_extract_data(call, true);
1825 if (ret < 0)
1826 return ret;
1827
1828 size = call->count2 = ntohl(call->tmp);
1829 size = round_up(size, 4);
1830
1831 if (yacl->flags & YFS_ACL_WANT_VOL_ACL) {
1832 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
1833 if (!acl)
1834 return -ENOMEM;
1835 yacl->vol_acl = acl;
1836 acl->size = call->count2;
1837 afs_extract_begin(call, acl->data, size);
1838 } else {
1839 afs_extract_discard(call, size);
1840 }
1841 call->unmarshall++;
1842 fallthrough;
1843
1844 /* Extract the volume ACL */
1845 case 4:
1846 ret = afs_extract_data(call, true);
1847 if (ret < 0)
1848 return ret;
1849
1850 afs_extract_to_buf(call,
1851 sizeof(__be32) * 2 +
1852 sizeof(struct yfs_xdr_YFSFetchStatus) +
1853 sizeof(struct yfs_xdr_YFSVolSync));
1854 call->unmarshall++;
1855 fallthrough;
1856
1857 /* extract the metadata */
1858 case 5:
1859 ret = afs_extract_data(call, false);
1860 if (ret < 0)
1861 return ret;
1862
1863 bp = call->buffer;
1864 yacl->inherit_flag = ntohl(*bp++);
1865 yacl->num_cleaned = ntohl(*bp++);
1866 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
1867 xdr_decode_YFSVolSync(&bp, &op->volsync);
1868
1869 call->unmarshall++;
1870 fallthrough;
1871
1872 case 6:
1873 break;
1874 }
1875
1876 _leave(" = 0 [done]");
1877 return 0;
1878 }
1879
1880 void yfs_free_opaque_acl(struct yfs_acl *yacl)
1881 {
1882 if (yacl) {
1883 kfree(yacl->acl);
1884 kfree(yacl->vol_acl);
1885 kfree(yacl);
1886 }
1887 }
1888
1889 /*
1890 * YFS.FetchOpaqueACL operation type
1891 */
1892 static const struct afs_call_type yfs_RXYFSFetchOpaqueACL = {
1893 .name = "YFS.FetchOpaqueACL",
1894 .op = yfs_FS_FetchOpaqueACL,
1895 .deliver = yfs_deliver_fs_fetch_opaque_acl,
1896 .destructor = afs_flat_call_destructor,
1897 };
1898
1899 /*
1900 * Fetch the YFS advanced ACLs for a file.
1901 */
1902 void yfs_fs_fetch_opaque_acl(struct afs_operation *op)
1903 {
1904 struct afs_vnode_param *vp = &op->file[0];
1905 struct afs_call *call;
1906 __be32 *bp;
1907
1908 _enter(",%x,{%llx:%llu},,",
1909 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1910
1911 call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchOpaqueACL,
1912 sizeof(__be32) * 2 +
1913 sizeof(struct yfs_xdr_YFSFid),
1914 sizeof(__be32) * 2 +
1915 sizeof(struct yfs_xdr_YFSFetchStatus) +
1916 sizeof(struct yfs_xdr_YFSVolSync));
1917 if (!call)
1918 return afs_op_nomem(op);
1919
1920 /* marshall the parameters */
1921 bp = call->request;
1922 bp = xdr_encode_u32(bp, YFSFETCHOPAQUEACL);
1923 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1924 bp = xdr_encode_YFSFid(bp, &vp->fid);
1925 yfs_check_req(call, bp);
1926
1927 call->fid = vp->fid;
1928 trace_afs_make_fs_call(call, &vp->fid);
1929 afs_make_op_call(op, call, GFP_KERNEL);
1930 }
1931
1932 /*
1933 * YFS.StoreOpaqueACL2 operation type
1934 */
1935 static const struct afs_call_type yfs_RXYFSStoreOpaqueACL2 = {
1936 .name = "YFS.StoreOpaqueACL2",
1937 .op = yfs_FS_StoreOpaqueACL2,
1938 .deliver = yfs_deliver_status_and_volsync,
1939 .destructor = afs_flat_call_destructor,
1940 };
1941
1942 /*
1943 * Fetch the YFS ACL for a file.
1944 */
1945 void yfs_fs_store_opaque_acl2(struct afs_operation *op)
1946 {
1947 struct afs_vnode_param *vp = &op->file[0];
1948 struct afs_call *call;
1949 struct afs_acl *acl = op->acl;
1950 size_t size;
1951 __be32 *bp;
1952
1953 _enter(",%x,{%llx:%llu},,",
1954 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1955
1956 size = round_up(acl->size, 4);
1957 call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreOpaqueACL2,
1958 sizeof(__be32) * 2 +
1959 sizeof(struct yfs_xdr_YFSFid) +
1960 sizeof(__be32) + size,
1961 sizeof(struct yfs_xdr_YFSFetchStatus) +
1962 sizeof(struct yfs_xdr_YFSVolSync));
1963 if (!call)
1964 return afs_op_nomem(op);
1965
1966 /* marshall the parameters */
1967 bp = call->request;
1968 bp = xdr_encode_u32(bp, YFSSTOREOPAQUEACL2);
1969 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1970 bp = xdr_encode_YFSFid(bp, &vp->fid);
1971 bp = xdr_encode_u32(bp, acl->size);
1972 memcpy(bp, acl->data, acl->size);
1973 if (acl->size != size)
1974 memset((void *)bp + acl->size, 0, size - acl->size);
1975 bp += size / sizeof(__be32);
1976 yfs_check_req(call, bp);
1977
1978 call->fid = vp->fid;
1979 trace_afs_make_fs_call(call, &vp->fid);
1980 afs_make_op_call(op, call, GFP_KERNEL);
1981 }
Kernel DRM miscellaneous fixes and cross-tree changes