]> git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - fs/afs/yfsclient.c
projects / mirror_ubuntu-jammy-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
timekeeping: Repair ktime_get_coarse*() granularity
[mirror_ubuntu-jammy-kernel.git] / fs / afs / yfsclient.c
1 /* YFS File Server client stubs
2 *
3 * Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public Licence
8 * as published by the Free Software Foundation; either version
9 * 2 of the Licence, or (at your option) any later version.
10 */
11
12 #include <linux/init.h>
13 #include <linux/slab.h>
14 #include <linux/sched.h>
15 #include <linux/circ_buf.h>
16 #include <linux/iversion.h>
17 #include "internal.h"
18 #include "afs_fs.h"
19 #include "xdr_fs.h"
20 #include "protocol_yfs.h"
21
22 static const struct afs_fid afs_zero_fid;
23
24 static inline void afs_use_fs_server(struct afs_call *call, struct afs_cb_interest *cbi)
25 {
26 call->cbi = afs_get_cb_interest(cbi);
27 }
28
29 #define xdr_size(x) (sizeof(*x) / sizeof(__be32))
30
31 static void xdr_decode_YFSFid(const __be32 **_bp, struct afs_fid *fid)
32 {
33 const struct yfs_xdr_YFSFid *x = (const void *)*_bp;
34
35 fid->vid = xdr_to_u64(x->volume);
36 fid->vnode = xdr_to_u64(x->vnode.lo);
37 fid->vnode_hi = ntohl(x->vnode.hi);
38 fid->unique = ntohl(x->vnode.unique);
39 *_bp += xdr_size(x);
40 }
41
42 static __be32 *xdr_encode_u32(__be32 *bp, u32 n)
43 {
44 *bp++ = htonl(n);
45 return bp;
46 }
47
48 static __be32 *xdr_encode_u64(__be32 *bp, u64 n)
49 {
50 struct yfs_xdr_u64 *x = (void *)bp;
51
52 *x = u64_to_xdr(n);
53 return bp + xdr_size(x);
54 }
55
56 static __be32 *xdr_encode_YFSFid(__be32 *bp, struct afs_fid *fid)
57 {
58 struct yfs_xdr_YFSFid *x = (void *)bp;
59
60 x->volume = u64_to_xdr(fid->vid);
61 x->vnode.lo = u64_to_xdr(fid->vnode);
62 x->vnode.hi = htonl(fid->vnode_hi);
63 x->vnode.unique = htonl(fid->unique);
64 return bp + xdr_size(x);
65 }
66
67 static size_t xdr_strlen(unsigned int len)
68 {
69 return sizeof(__be32) + round_up(len, sizeof(__be32));
70 }
71
72 static __be32 *xdr_encode_string(__be32 *bp, const char *p, unsigned int len)
73 {
74 bp = xdr_encode_u32(bp, len);
75 bp = memcpy(bp, p, len);
76 if (len & 3) {
77 unsigned int pad = 4 - (len & 3);
78
79 memset((u8 *)bp + len, 0, pad);
80 len += pad;
81 }
82
83 return bp + len / sizeof(__be32);
84 }
85
86 static s64 linux_to_yfs_time(const struct timespec64 *t)
87 {
88 /* Convert to 100ns intervals. */
89 return (u64)t->tv_sec * 10000000 + t->tv_nsec/100;
90 }
91
92 static __be32 *xdr_encode_YFSStoreStatus_mode(__be32 *bp, mode_t mode)
93 {
94 struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
95
96 x->mask = htonl(AFS_SET_MODE);
97 x->mode = htonl(mode & S_IALLUGO);
98 x->mtime_client = u64_to_xdr(0);
99 x->owner = u64_to_xdr(0);
100 x->group = u64_to_xdr(0);
101 return bp + xdr_size(x);
102 }
103
104 static __be32 *xdr_encode_YFSStoreStatus_mtime(__be32 *bp, const struct timespec64 *t)
105 {
106 struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
107 s64 mtime = linux_to_yfs_time(t);
108
109 x->mask = htonl(AFS_SET_MTIME);
110 x->mode = htonl(0);
111 x->mtime_client = u64_to_xdr(mtime);
112 x->owner = u64_to_xdr(0);
113 x->group = u64_to_xdr(0);
114 return bp + xdr_size(x);
115 }
116
117 /*
118 * Convert a signed 100ns-resolution 64-bit time into a timespec.
119 */
120 static struct timespec64 yfs_time_to_linux(s64 t)
121 {
122 struct timespec64 ts;
123 u64 abs_t;
124
125 /*
126 * Unfortunately can not use normal 64 bit division on 32 bit arch, but
127 * the alternative, do_div, does not work with negative numbers so have
128 * to special case them
129 */
130 if (t < 0) {
131 abs_t = -t;
132 ts.tv_nsec = (time64_t)(do_div(abs_t, 10000000) * 100);
133 ts.tv_nsec = -ts.tv_nsec;
134 ts.tv_sec = -abs_t;
135 } else {
136 abs_t = t;
137 ts.tv_nsec = (time64_t)do_div(abs_t, 10000000) * 100;
138 ts.tv_sec = abs_t;
139 }
140
141 return ts;
142 }
143
144 static struct timespec64 xdr_to_time(const struct yfs_xdr_u64 xdr)
145 {
146 s64 t = xdr_to_u64(xdr);
147
148 return yfs_time_to_linux(t);
149 }
150
151 static void yfs_check_req(struct afs_call *call, __be32 *bp)
152 {
153 size_t len = (void *)bp - call->request;
154
155 if (len > call->request_size)
156 pr_err("kAFS: %s: Request buffer overflow (%zu>%u)\n",
157 call->type->name, len, call->request_size);
158 else if (len < call->request_size)
159 pr_warning("kAFS: %s: Request buffer underflow (%zu<%u)\n",
160 call->type->name, len, call->request_size);
161 }
162
163 /*
164 * Dump a bad file status record.
165 */
166 static void xdr_dump_bad(const __be32 *bp)
167 {
168 __be32 x[4];
169 int i;
170
171 pr_notice("YFS XDR: Bad status record\n");
172 for (i = 0; i < 5 * 4 * 4; i += 16) {
173 memcpy(x, bp, 16);
174 bp += 4;
175 pr_notice("%03x: %08x %08x %08x %08x\n",
176 i, ntohl(x[0]), ntohl(x[1]), ntohl(x[2]), ntohl(x[3]));
177 }
178
179 memcpy(x, bp, 4);
180 pr_notice("0x50: %08x\n", ntohl(x[0]));
181 }
182
183 /*
184 * Decode a YFSFetchStatus block
185 */
186 static int xdr_decode_YFSFetchStatus(const __be32 **_bp,
187 struct afs_call *call,
188 struct afs_status_cb *scb)
189 {
190 const struct yfs_xdr_YFSFetchStatus *xdr = (const void *)*_bp;
191 struct afs_file_status *status = &scb->status;
192 u32 type;
193
194 status->abort_code = ntohl(xdr->abort_code);
195 if (status->abort_code != 0) {
196 if (status->abort_code == VNOVNODE)
197 status->nlink = 0;
198 scb->have_error = true;
199 return 0;
200 }
201
202 type = ntohl(xdr->type);
203 switch (type) {
204 case AFS_FTYPE_FILE:
205 case AFS_FTYPE_DIR:
206 case AFS_FTYPE_SYMLINK:
207 status->type = type;
208 break;
209 default:
210 goto bad;
211 }
212
213 status->nlink = ntohl(xdr->nlink);
214 status->author = xdr_to_u64(xdr->author);
215 status->owner = xdr_to_u64(xdr->owner);
216 status->caller_access = ntohl(xdr->caller_access); /* Ticket dependent */
217 status->anon_access = ntohl(xdr->anon_access);
218 status->mode = ntohl(xdr->mode) & S_IALLUGO;
219 status->group = xdr_to_u64(xdr->group);
220 status->lock_count = ntohl(xdr->lock_count);
221
222 status->mtime_client = xdr_to_time(xdr->mtime_client);
223 status->mtime_server = xdr_to_time(xdr->mtime_server);
224 status->size = xdr_to_u64(xdr->size);
225 status->data_version = xdr_to_u64(xdr->data_version);
226 scb->have_status = true;
227
228 *_bp += xdr_size(xdr);
229 return 0;
230
231 bad:
232 xdr_dump_bad(*_bp);
233 return afs_protocol_error(call, -EBADMSG, afs_eproto_bad_status);
234 }
235
236 /*
237 * Decode a YFSCallBack block
238 */
239 static void xdr_decode_YFSCallBack(const __be32 **_bp,
240 struct afs_call *call,
241 struct afs_status_cb *scb)
242 {
243 struct yfs_xdr_YFSCallBack *x = (void *)*_bp;
244 struct afs_callback *cb = &scb->callback;
245 ktime_t cb_expiry;
246
247 cb_expiry = call->reply_time;
248 cb_expiry = ktime_add(cb_expiry, xdr_to_u64(x->expiration_time) * 100);
249 cb->expires_at = ktime_divns(cb_expiry, NSEC_PER_SEC);
250 scb->have_cb = true;
251 *_bp += xdr_size(x);
252 }
253
254 /*
255 * Decode a YFSVolSync block
256 */
257 static void xdr_decode_YFSVolSync(const __be32 **_bp,
258 struct afs_volsync *volsync)
259 {
260 struct yfs_xdr_YFSVolSync *x = (void *)*_bp;
261 u64 creation;
262
263 if (volsync) {
264 creation = xdr_to_u64(x->vol_creation_date);
265 do_div(creation, 10 * 1000 * 1000);
266 volsync->creation = creation;
267 }
268
269 *_bp += xdr_size(x);
270 }
271
272 /*
273 * Encode the requested attributes into a YFSStoreStatus block
274 */
275 static __be32 *xdr_encode_YFS_StoreStatus(__be32 *bp, struct iattr *attr)
276 {
277 struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
278 s64 mtime = 0, owner = 0, group = 0;
279 u32 mask = 0, mode = 0;
280
281 mask = 0;
282 if (attr->ia_valid & ATTR_MTIME) {
283 mask |= AFS_SET_MTIME;
284 mtime = linux_to_yfs_time(&attr->ia_mtime);
285 }
286
287 if (attr->ia_valid & ATTR_UID) {
288 mask |= AFS_SET_OWNER;
289 owner = from_kuid(&init_user_ns, attr->ia_uid);
290 }
291
292 if (attr->ia_valid & ATTR_GID) {
293 mask |= AFS_SET_GROUP;
294 group = from_kgid(&init_user_ns, attr->ia_gid);
295 }
296
297 if (attr->ia_valid & ATTR_MODE) {
298 mask |= AFS_SET_MODE;
299 mode = attr->ia_mode & S_IALLUGO;
300 }
301
302 x->mask = htonl(mask);
303 x->mode = htonl(mode);
304 x->mtime_client = u64_to_xdr(mtime);
305 x->owner = u64_to_xdr(owner);
306 x->group = u64_to_xdr(group);
307 return bp + xdr_size(x);
308 }
309
310 /*
311 * Decode a YFSFetchVolumeStatus block.
312 */
313 static void xdr_decode_YFSFetchVolumeStatus(const __be32 **_bp,
314 struct afs_volume_status *vs)
315 {
316 const struct yfs_xdr_YFSFetchVolumeStatus *x = (const void *)*_bp;
317 u32 flags;
318
319 vs->vid = xdr_to_u64(x->vid);
320 vs->parent_id = xdr_to_u64(x->parent_id);
321 flags = ntohl(x->flags);
322 vs->online = flags & yfs_FVSOnline;
323 vs->in_service = flags & yfs_FVSInservice;
324 vs->blessed = flags & yfs_FVSBlessed;
325 vs->needs_salvage = flags & yfs_FVSNeedsSalvage;
326 vs->type = ntohl(x->type);
327 vs->min_quota = 0;
328 vs->max_quota = xdr_to_u64(x->max_quota);
329 vs->blocks_in_use = xdr_to_u64(x->blocks_in_use);
330 vs->part_blocks_avail = xdr_to_u64(x->part_blocks_avail);
331 vs->part_max_blocks = xdr_to_u64(x->part_max_blocks);
332 vs->vol_copy_date = xdr_to_u64(x->vol_copy_date);
333 vs->vol_backup_date = xdr_to_u64(x->vol_backup_date);
334 *_bp += sizeof(*x) / sizeof(__be32);
335 }
336
337 /*
338 * Deliver a reply that's a status, callback and volsync.
339 */
340 static int yfs_deliver_fs_status_cb_and_volsync(struct afs_call *call)
341 {
342 const __be32 *bp;
343 int ret;
344
345 ret = afs_transfer_reply(call);
346 if (ret < 0)
347 return ret;
348
349 /* unmarshall the reply once we've received all of it */
350 bp = call->buffer;
351 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
352 if (ret < 0)
353 return ret;
354 xdr_decode_YFSCallBack(&bp, call, call->out_scb);
355 xdr_decode_YFSVolSync(&bp, call->out_volsync);
356
357 _leave(" = 0 [done]");
358 return 0;
359 }
360
361 /*
362 * Deliver reply data to operations that just return a file status and a volume
363 * sync record.
364 */
365 static int yfs_deliver_status_and_volsync(struct afs_call *call)
366 {
367 const __be32 *bp;
368 int ret;
369
370 ret = afs_transfer_reply(call);
371 if (ret < 0)
372 return ret;
373
374 bp = call->buffer;
375 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
376 if (ret < 0)
377 return ret;
378 xdr_decode_YFSVolSync(&bp, call->out_volsync);
379
380 _leave(" = 0 [done]");
381 return 0;
382 }
383
384 /*
385 * YFS.FetchStatus operation type
386 */
387 static const struct afs_call_type yfs_RXYFSFetchStatus_vnode = {
388 .name = "YFS.FetchStatus(vnode)",
389 .op = yfs_FS_FetchStatus,
390 .deliver = yfs_deliver_fs_status_cb_and_volsync,
391 .destructor = afs_flat_call_destructor,
392 };
393
394 /*
395 * Fetch the status information for a file.
396 */
397 int yfs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_status_cb *scb,
398 struct afs_volsync *volsync)
399 {
400 struct afs_vnode *vnode = fc->vnode;
401 struct afs_call *call;
402 struct afs_net *net = afs_v2net(vnode);
403 __be32 *bp;
404
405 _enter(",%x,{%llx:%llu},,",
406 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
407
408 call = afs_alloc_flat_call(net, &yfs_RXYFSFetchStatus_vnode,
409 sizeof(__be32) * 2 +
410 sizeof(struct yfs_xdr_YFSFid),
411 sizeof(struct yfs_xdr_YFSFetchStatus) +
412 sizeof(struct yfs_xdr_YFSCallBack) +
413 sizeof(struct yfs_xdr_YFSVolSync));
414 if (!call) {
415 fc->ac.error = -ENOMEM;
416 return -ENOMEM;
417 }
418
419 call->key = fc->key;
420 call->out_scb = scb;
421 call->out_volsync = volsync;
422
423 /* marshall the parameters */
424 bp = call->request;
425 bp = xdr_encode_u32(bp, YFSFETCHSTATUS);
426 bp = xdr_encode_u32(bp, 0); /* RPC flags */
427 bp = xdr_encode_YFSFid(bp, &vnode->fid);
428 yfs_check_req(call, bp);
429
430 afs_use_fs_server(call, fc->cbi);
431 trace_afs_make_fs_call(call, &vnode->fid);
432 afs_set_fc_call(call, fc);
433 afs_make_call(&fc->ac, call, GFP_NOFS);
434 return afs_wait_for_call_to_complete(call, &fc->ac);
435 }
436
437 /*
438 * Deliver reply data to an YFS.FetchData64.
439 */
440 static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
441 {
442 struct afs_read *req = call->read_request;
443 const __be32 *bp;
444 unsigned int size;
445 int ret;
446
447 _enter("{%u,%zu/%llu}",
448 call->unmarshall, iov_iter_count(&call->iter), req->actual_len);
449
450 switch (call->unmarshall) {
451 case 0:
452 req->actual_len = 0;
453 req->index = 0;
454 req->offset = req->pos & (PAGE_SIZE - 1);
455 afs_extract_to_tmp64(call);
456 call->unmarshall++;
457
458 /* Fall through - and extract the returned data length */
459 case 1:
460 _debug("extract data length");
461 ret = afs_extract_data(call, true);
462 if (ret < 0)
463 return ret;
464
465 req->actual_len = be64_to_cpu(call->tmp64);
466 _debug("DATA length: %llu", req->actual_len);
467 req->remain = min(req->len, req->actual_len);
468 if (req->remain == 0)
469 goto no_more_data;
470
471 call->unmarshall++;
472
473 begin_page:
474 ASSERTCMP(req->index, <, req->nr_pages);
475 if (req->remain > PAGE_SIZE - req->offset)
476 size = PAGE_SIZE - req->offset;
477 else
478 size = req->remain;
479 call->bvec[0].bv_len = size;
480 call->bvec[0].bv_offset = req->offset;
481 call->bvec[0].bv_page = req->pages[req->index];
482 iov_iter_bvec(&call->iter, READ, call->bvec, 1, size);
483 ASSERTCMP(size, <=, PAGE_SIZE);
484
485 /* Fall through - and extract the returned data */
486 case 2:
487 _debug("extract data %zu/%llu",
488 iov_iter_count(&call->iter), req->remain);
489
490 ret = afs_extract_data(call, true);
491 if (ret < 0)
492 return ret;
493 req->remain -= call->bvec[0].bv_len;
494 req->offset += call->bvec[0].bv_len;
495 ASSERTCMP(req->offset, <=, PAGE_SIZE);
496 if (req->offset == PAGE_SIZE) {
497 req->offset = 0;
498 if (req->page_done)
499 req->page_done(req);
500 req->index++;
501 if (req->remain > 0)
502 goto begin_page;
503 }
504
505 ASSERTCMP(req->remain, ==, 0);
506 if (req->actual_len <= req->len)
507 goto no_more_data;
508
509 /* Discard any excess data the server gave us */
510 iov_iter_discard(&call->iter, READ, req->actual_len - req->len);
511 call->unmarshall = 3;
512
513 /* Fall through */
514 case 3:
515 _debug("extract discard %zu/%llu",
516 iov_iter_count(&call->iter), req->actual_len - req->len);
517
518 ret = afs_extract_data(call, true);
519 if (ret < 0)
520 return ret;
521
522 no_more_data:
523 call->unmarshall = 4;
524 afs_extract_to_buf(call,
525 sizeof(struct yfs_xdr_YFSFetchStatus) +
526 sizeof(struct yfs_xdr_YFSCallBack) +
527 sizeof(struct yfs_xdr_YFSVolSync));
528
529 /* Fall through - and extract the metadata */
530 case 4:
531 ret = afs_extract_data(call, false);
532 if (ret < 0)
533 return ret;
534
535 bp = call->buffer;
536 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
537 if (ret < 0)
538 return ret;
539 xdr_decode_YFSCallBack(&bp, call, call->out_scb);
540 xdr_decode_YFSVolSync(&bp, call->out_volsync);
541
542 req->data_version = call->out_scb->status.data_version;
543 req->file_size = call->out_scb->status.size;
544
545 call->unmarshall++;
546
547 /* Fall through */
548 case 5:
549 break;
550 }
551
552 for (; req->index < req->nr_pages; req->index++) {
553 if (req->offset < PAGE_SIZE)
554 zero_user_segment(req->pages[req->index],
555 req->offset, PAGE_SIZE);
556 if (req->page_done)
557 req->page_done(req);
558 req->offset = 0;
559 }
560
561 _leave(" = 0 [done]");
562 return 0;
563 }
564
565 static void yfs_fetch_data_destructor(struct afs_call *call)
566 {
567 afs_put_read(call->read_request);
568 afs_flat_call_destructor(call);
569 }
570
571 /*
572 * YFS.FetchData64 operation type
573 */
574 static const struct afs_call_type yfs_RXYFSFetchData64 = {
575 .name = "YFS.FetchData64",
576 .op = yfs_FS_FetchData64,
577 .deliver = yfs_deliver_fs_fetch_data64,
578 .destructor = yfs_fetch_data_destructor,
579 };
580
581 /*
582 * Fetch data from a file.
583 */
584 int yfs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_status_cb *scb,
585 struct afs_read *req)
586 {
587 struct afs_vnode *vnode = fc->vnode;
588 struct afs_call *call;
589 struct afs_net *net = afs_v2net(vnode);
590 __be32 *bp;
591
592 _enter(",%x,{%llx:%llu},%llx,%llx",
593 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode,
594 req->pos, req->len);
595
596 call = afs_alloc_flat_call(net, &yfs_RXYFSFetchData64,
597 sizeof(__be32) * 2 +
598 sizeof(struct yfs_xdr_YFSFid) +
599 sizeof(struct yfs_xdr_u64) * 2,
600 sizeof(struct yfs_xdr_YFSFetchStatus) +
601 sizeof(struct yfs_xdr_YFSCallBack) +
602 sizeof(struct yfs_xdr_YFSVolSync));
603 if (!call)
604 return -ENOMEM;
605
606 call->key = fc->key;
607 call->out_scb = scb;
608 call->out_volsync = NULL;
609 call->read_request = req;
610
611 /* marshall the parameters */
612 bp = call->request;
613 bp = xdr_encode_u32(bp, YFSFETCHDATA64);
614 bp = xdr_encode_u32(bp, 0); /* RPC flags */
615 bp = xdr_encode_YFSFid(bp, &vnode->fid);
616 bp = xdr_encode_u64(bp, req->pos);
617 bp = xdr_encode_u64(bp, req->len);
618 yfs_check_req(call, bp);
619
620 refcount_inc(&req->usage);
621 afs_use_fs_server(call, fc->cbi);
622 trace_afs_make_fs_call(call, &vnode->fid);
623 afs_set_fc_call(call, fc);
624 afs_make_call(&fc->ac, call, GFP_NOFS);
625 return afs_wait_for_call_to_complete(call, &fc->ac);
626 }
627
628 /*
629 * Deliver reply data for YFS.CreateFile or YFS.MakeDir.
630 */
631 static int yfs_deliver_fs_create_vnode(struct afs_call *call)
632 {
633 const __be32 *bp;
634 int ret;
635
636 _enter("{%u}", call->unmarshall);
637
638 ret = afs_transfer_reply(call);
639 if (ret < 0)
640 return ret;
641
642 /* unmarshall the reply once we've received all of it */
643 bp = call->buffer;
644 xdr_decode_YFSFid(&bp, call->out_fid);
645 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
646 if (ret < 0)
647 return ret;
648 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
649 if (ret < 0)
650 return ret;
651 xdr_decode_YFSCallBack(&bp, call, call->out_scb);
652 xdr_decode_YFSVolSync(&bp, call->out_volsync);
653
654 _leave(" = 0 [done]");
655 return 0;
656 }
657
658 /*
659 * FS.CreateFile and FS.MakeDir operation type
660 */
661 static const struct afs_call_type afs_RXFSCreateFile = {
662 .name = "YFS.CreateFile",
663 .op = yfs_FS_CreateFile,
664 .deliver = yfs_deliver_fs_create_vnode,
665 .destructor = afs_flat_call_destructor,
666 };
667
668 /*
669 * Create a file.
670 */
671 int yfs_fs_create_file(struct afs_fs_cursor *fc,
672 const char *name,
673 umode_t mode,
674 struct afs_status_cb *dvnode_scb,
675 struct afs_fid *newfid,
676 struct afs_status_cb *new_scb)
677 {
678 struct afs_vnode *dvnode = fc->vnode;
679 struct afs_call *call;
680 struct afs_net *net = afs_v2net(dvnode);
681 size_t namesz, reqsz, rplsz;
682 __be32 *bp;
683
684 _enter("");
685
686 namesz = strlen(name);
687 reqsz = (sizeof(__be32) +
688 sizeof(__be32) +
689 sizeof(struct yfs_xdr_YFSFid) +
690 xdr_strlen(namesz) +
691 sizeof(struct yfs_xdr_YFSStoreStatus) +
692 sizeof(__be32));
693 rplsz = (sizeof(struct yfs_xdr_YFSFid) +
694 sizeof(struct yfs_xdr_YFSFetchStatus) +
695 sizeof(struct yfs_xdr_YFSFetchStatus) +
696 sizeof(struct yfs_xdr_YFSCallBack) +
697 sizeof(struct yfs_xdr_YFSVolSync));
698
699 call = afs_alloc_flat_call(net, &afs_RXFSCreateFile, reqsz, rplsz);
700 if (!call)
701 return -ENOMEM;
702
703 call->key = fc->key;
704 call->out_dir_scb = dvnode_scb;
705 call->out_fid = newfid;
706 call->out_scb = new_scb;
707
708 /* marshall the parameters */
709 bp = call->request;
710 bp = xdr_encode_u32(bp, YFSCREATEFILE);
711 bp = xdr_encode_u32(bp, 0); /* RPC flags */
712 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
713 bp = xdr_encode_string(bp, name, namesz);
714 bp = xdr_encode_YFSStoreStatus_mode(bp, mode);
715 bp = xdr_encode_u32(bp, yfs_LockNone); /* ViceLockType */
716 yfs_check_req(call, bp);
717
718 afs_use_fs_server(call, fc->cbi);
719 trace_afs_make_fs_call1(call, &dvnode->fid, name);
720 afs_set_fc_call(call, fc);
721 afs_make_call(&fc->ac, call, GFP_NOFS);
722 return afs_wait_for_call_to_complete(call, &fc->ac);
723 }
724
725 static const struct afs_call_type yfs_RXFSMakeDir = {
726 .name = "YFS.MakeDir",
727 .op = yfs_FS_MakeDir,
728 .deliver = yfs_deliver_fs_create_vnode,
729 .destructor = afs_flat_call_destructor,
730 };
731
732 /*
733 * Make a directory.
734 */
735 int yfs_fs_make_dir(struct afs_fs_cursor *fc,
736 const char *name,
737 umode_t mode,
738 struct afs_status_cb *dvnode_scb,
739 struct afs_fid *newfid,
740 struct afs_status_cb *new_scb)
741 {
742 struct afs_vnode *dvnode = fc->vnode;
743 struct afs_call *call;
744 struct afs_net *net = afs_v2net(dvnode);
745 size_t namesz, reqsz, rplsz;
746 __be32 *bp;
747
748 _enter("");
749
750 namesz = strlen(name);
751 reqsz = (sizeof(__be32) +
752 sizeof(struct yfs_xdr_RPCFlags) +
753 sizeof(struct yfs_xdr_YFSFid) +
754 xdr_strlen(namesz) +
755 sizeof(struct yfs_xdr_YFSStoreStatus));
756 rplsz = (sizeof(struct yfs_xdr_YFSFid) +
757 sizeof(struct yfs_xdr_YFSFetchStatus) +
758 sizeof(struct yfs_xdr_YFSFetchStatus) +
759 sizeof(struct yfs_xdr_YFSCallBack) +
760 sizeof(struct yfs_xdr_YFSVolSync));
761
762 call = afs_alloc_flat_call(net, &yfs_RXFSMakeDir, reqsz, rplsz);
763 if (!call)
764 return -ENOMEM;
765
766 call->key = fc->key;
767 call->out_dir_scb = dvnode_scb;
768 call->out_fid = newfid;
769 call->out_scb = new_scb;
770
771 /* marshall the parameters */
772 bp = call->request;
773 bp = xdr_encode_u32(bp, YFSMAKEDIR);
774 bp = xdr_encode_u32(bp, 0); /* RPC flags */
775 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
776 bp = xdr_encode_string(bp, name, namesz);
777 bp = xdr_encode_YFSStoreStatus_mode(bp, mode);
778 yfs_check_req(call, bp);
779
780 afs_use_fs_server(call, fc->cbi);
781 trace_afs_make_fs_call1(call, &dvnode->fid, name);
782 afs_set_fc_call(call, fc);
783 afs_make_call(&fc->ac, call, GFP_NOFS);
784 return afs_wait_for_call_to_complete(call, &fc->ac);
785 }
786
787 /*
788 * Deliver reply data to a YFS.RemoveFile2 operation.
789 */
790 static int yfs_deliver_fs_remove_file2(struct afs_call *call)
791 {
792 struct afs_fid fid;
793 const __be32 *bp;
794 int ret;
795
796 _enter("{%u}", call->unmarshall);
797
798 ret = afs_transfer_reply(call);
799 if (ret < 0)
800 return ret;
801
802 bp = call->buffer;
803 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
804 if (ret < 0)
805 return ret;
806
807 xdr_decode_YFSFid(&bp, &fid);
808 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
809 if (ret < 0)
810 return ret;
811 /* Was deleted if vnode->status.abort_code == VNOVNODE. */
812
813 xdr_decode_YFSVolSync(&bp, call->out_volsync);
814 return 0;
815 }
816
817 /*
818 * YFS.RemoveFile2 operation type.
819 */
820 static const struct afs_call_type yfs_RXYFSRemoveFile2 = {
821 .name = "YFS.RemoveFile2",
822 .op = yfs_FS_RemoveFile2,
823 .deliver = yfs_deliver_fs_remove_file2,
824 .destructor = afs_flat_call_destructor,
825 };
826
827 /*
828 * Remove a file and retrieve new file status.
829 */
830 int yfs_fs_remove_file2(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
831 const char *name, struct afs_status_cb *dvnode_scb,
832 struct afs_status_cb *vnode_scb)
833 {
834 struct afs_vnode *dvnode = fc->vnode;
835 struct afs_call *call;
836 struct afs_net *net = afs_v2net(dvnode);
837 size_t namesz;
838 __be32 *bp;
839
840 _enter("");
841
842 namesz = strlen(name);
843
844 call = afs_alloc_flat_call(net, &yfs_RXYFSRemoveFile2,
845 sizeof(__be32) +
846 sizeof(struct yfs_xdr_RPCFlags) +
847 sizeof(struct yfs_xdr_YFSFid) +
848 xdr_strlen(namesz),
849 sizeof(struct yfs_xdr_YFSFetchStatus) +
850 sizeof(struct yfs_xdr_YFSFid) +
851 sizeof(struct yfs_xdr_YFSFetchStatus) +
852 sizeof(struct yfs_xdr_YFSVolSync));
853 if (!call)
854 return -ENOMEM;
855
856 call->key = fc->key;
857 call->out_dir_scb = dvnode_scb;
858 call->out_scb = vnode_scb;
859
860 /* marshall the parameters */
861 bp = call->request;
862 bp = xdr_encode_u32(bp, YFSREMOVEFILE2);
863 bp = xdr_encode_u32(bp, 0); /* RPC flags */
864 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
865 bp = xdr_encode_string(bp, name, namesz);
866 yfs_check_req(call, bp);
867
868 afs_use_fs_server(call, fc->cbi);
869 trace_afs_make_fs_call1(call, &dvnode->fid, name);
870 afs_set_fc_call(call, fc);
871 afs_make_call(&fc->ac, call, GFP_NOFS);
872 return afs_wait_for_call_to_complete(call, &fc->ac);
873 }
874
875 /*
876 * Deliver reply data to a YFS.RemoveFile or YFS.RemoveDir operation.
877 */
878 static int yfs_deliver_fs_remove(struct afs_call *call)
879 {
880 const __be32 *bp;
881 int ret;
882
883 _enter("{%u}", call->unmarshall);
884
885 ret = afs_transfer_reply(call);
886 if (ret < 0)
887 return ret;
888
889 bp = call->buffer;
890 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
891 if (ret < 0)
892 return ret;
893
894 xdr_decode_YFSVolSync(&bp, call->out_volsync);
895 return 0;
896 }
897
898 /*
899 * FS.RemoveDir and FS.RemoveFile operation types.
900 */
901 static const struct afs_call_type yfs_RXYFSRemoveFile = {
902 .name = "YFS.RemoveFile",
903 .op = yfs_FS_RemoveFile,
904 .deliver = yfs_deliver_fs_remove,
905 .destructor = afs_flat_call_destructor,
906 };
907
908 static const struct afs_call_type yfs_RXYFSRemoveDir = {
909 .name = "YFS.RemoveDir",
910 .op = yfs_FS_RemoveDir,
911 .deliver = yfs_deliver_fs_remove,
912 .destructor = afs_flat_call_destructor,
913 };
914
915 /*
916 * remove a file or directory
917 */
918 int yfs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
919 const char *name, bool isdir,
920 struct afs_status_cb *dvnode_scb)
921 {
922 struct afs_vnode *dvnode = fc->vnode;
923 struct afs_call *call;
924 struct afs_net *net = afs_v2net(dvnode);
925 size_t namesz;
926 __be32 *bp;
927
928 _enter("");
929
930 namesz = strlen(name);
931 call = afs_alloc_flat_call(
932 net, isdir ? &yfs_RXYFSRemoveDir : &yfs_RXYFSRemoveFile,
933 sizeof(__be32) +
934 sizeof(struct yfs_xdr_RPCFlags) +
935 sizeof(struct yfs_xdr_YFSFid) +
936 xdr_strlen(namesz),
937 sizeof(struct yfs_xdr_YFSFetchStatus) +
938 sizeof(struct yfs_xdr_YFSVolSync));
939 if (!call)
940 return -ENOMEM;
941
942 call->key = fc->key;
943 call->out_dir_scb = dvnode_scb;
944
945 /* marshall the parameters */
946 bp = call->request;
947 bp = xdr_encode_u32(bp, isdir ? YFSREMOVEDIR : YFSREMOVEFILE);
948 bp = xdr_encode_u32(bp, 0); /* RPC flags */
949 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
950 bp = xdr_encode_string(bp, name, namesz);
951 yfs_check_req(call, bp);
952
953 afs_use_fs_server(call, fc->cbi);
954 trace_afs_make_fs_call1(call, &dvnode->fid, name);
955 afs_set_fc_call(call, fc);
956 afs_make_call(&fc->ac, call, GFP_NOFS);
957 return afs_wait_for_call_to_complete(call, &fc->ac);
958 }
959
960 /*
961 * Deliver reply data to a YFS.Link operation.
962 */
963 static int yfs_deliver_fs_link(struct afs_call *call)
964 {
965 const __be32 *bp;
966 int ret;
967
968 _enter("{%u}", call->unmarshall);
969
970 ret = afs_transfer_reply(call);
971 if (ret < 0)
972 return ret;
973
974 bp = call->buffer;
975 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
976 if (ret < 0)
977 return ret;
978 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
979 if (ret < 0)
980 return ret;
981 xdr_decode_YFSVolSync(&bp, call->out_volsync);
982 _leave(" = 0 [done]");
983 return 0;
984 }
985
986 /*
987 * YFS.Link operation type.
988 */
989 static const struct afs_call_type yfs_RXYFSLink = {
990 .name = "YFS.Link",
991 .op = yfs_FS_Link,
992 .deliver = yfs_deliver_fs_link,
993 .destructor = afs_flat_call_destructor,
994 };
995
996 /*
997 * Make a hard link.
998 */
999 int yfs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
1000 const char *name,
1001 struct afs_status_cb *dvnode_scb,
1002 struct afs_status_cb *vnode_scb)
1003 {
1004 struct afs_vnode *dvnode = fc->vnode;
1005 struct afs_call *call;
1006 struct afs_net *net = afs_v2net(vnode);
1007 size_t namesz;
1008 __be32 *bp;
1009
1010 _enter("");
1011
1012 namesz = strlen(name);
1013 call = afs_alloc_flat_call(net, &yfs_RXYFSLink,
1014 sizeof(__be32) +
1015 sizeof(struct yfs_xdr_RPCFlags) +
1016 sizeof(struct yfs_xdr_YFSFid) +
1017 xdr_strlen(namesz) +
1018 sizeof(struct yfs_xdr_YFSFid),
1019 sizeof(struct yfs_xdr_YFSFetchStatus) +
1020 sizeof(struct yfs_xdr_YFSFetchStatus) +
1021 sizeof(struct yfs_xdr_YFSVolSync));
1022 if (!call)
1023 return -ENOMEM;
1024
1025 call->key = fc->key;
1026 call->out_dir_scb = dvnode_scb;
1027 call->out_scb = vnode_scb;
1028
1029 /* marshall the parameters */
1030 bp = call->request;
1031 bp = xdr_encode_u32(bp, YFSLINK);
1032 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1033 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
1034 bp = xdr_encode_string(bp, name, namesz);
1035 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1036 yfs_check_req(call, bp);
1037
1038 afs_use_fs_server(call, fc->cbi);
1039 trace_afs_make_fs_call1(call, &vnode->fid, name);
1040 afs_set_fc_call(call, fc);
1041 afs_make_call(&fc->ac, call, GFP_NOFS);
1042 return afs_wait_for_call_to_complete(call, &fc->ac);
1043 }
1044
1045 /*
1046 * Deliver reply data to a YFS.Symlink operation.
1047 */
1048 static int yfs_deliver_fs_symlink(struct afs_call *call)
1049 {
1050 const __be32 *bp;
1051 int ret;
1052
1053 _enter("{%u}", call->unmarshall);
1054
1055 ret = afs_transfer_reply(call);
1056 if (ret < 0)
1057 return ret;
1058
1059 /* unmarshall the reply once we've received all of it */
1060 bp = call->buffer;
1061 xdr_decode_YFSFid(&bp, call->out_fid);
1062 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
1063 if (ret < 0)
1064 return ret;
1065 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
1066 if (ret < 0)
1067 return ret;
1068 xdr_decode_YFSVolSync(&bp, call->out_volsync);
1069
1070 _leave(" = 0 [done]");
1071 return 0;
1072 }
1073
1074 /*
1075 * YFS.Symlink operation type
1076 */
1077 static const struct afs_call_type yfs_RXYFSSymlink = {
1078 .name = "YFS.Symlink",
1079 .op = yfs_FS_Symlink,
1080 .deliver = yfs_deliver_fs_symlink,
1081 .destructor = afs_flat_call_destructor,
1082 };
1083
1084 /*
1085 * Create a symbolic link.
1086 */
1087 int yfs_fs_symlink(struct afs_fs_cursor *fc,
1088 const char *name,
1089 const char *contents,
1090 struct afs_status_cb *dvnode_scb,
1091 struct afs_fid *newfid,
1092 struct afs_status_cb *vnode_scb)
1093 {
1094 struct afs_vnode *dvnode = fc->vnode;
1095 struct afs_call *call;
1096 struct afs_net *net = afs_v2net(dvnode);
1097 size_t namesz, contents_sz;
1098 __be32 *bp;
1099
1100 _enter("");
1101
1102 namesz = strlen(name);
1103 contents_sz = strlen(contents);
1104 call = afs_alloc_flat_call(net, &yfs_RXYFSSymlink,
1105 sizeof(__be32) +
1106 sizeof(struct yfs_xdr_RPCFlags) +
1107 sizeof(struct yfs_xdr_YFSFid) +
1108 xdr_strlen(namesz) +
1109 xdr_strlen(contents_sz) +
1110 sizeof(struct yfs_xdr_YFSStoreStatus),
1111 sizeof(struct yfs_xdr_YFSFid) +
1112 sizeof(struct yfs_xdr_YFSFetchStatus) +
1113 sizeof(struct yfs_xdr_YFSFetchStatus) +
1114 sizeof(struct yfs_xdr_YFSVolSync));
1115 if (!call)
1116 return -ENOMEM;
1117
1118 call->key = fc->key;
1119 call->out_dir_scb = dvnode_scb;
1120 call->out_fid = newfid;
1121 call->out_scb = vnode_scb;
1122
1123 /* marshall the parameters */
1124 bp = call->request;
1125 bp = xdr_encode_u32(bp, YFSSYMLINK);
1126 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1127 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
1128 bp = xdr_encode_string(bp, name, namesz);
1129 bp = xdr_encode_string(bp, contents, contents_sz);
1130 bp = xdr_encode_YFSStoreStatus_mode(bp, S_IRWXUGO);
1131 yfs_check_req(call, bp);
1132
1133 afs_use_fs_server(call, fc->cbi);
1134 trace_afs_make_fs_call1(call, &dvnode->fid, name);
1135 afs_set_fc_call(call, fc);
1136 afs_make_call(&fc->ac, call, GFP_NOFS);
1137 return afs_wait_for_call_to_complete(call, &fc->ac);
1138 }
1139
1140 /*
1141 * Deliver reply data to a YFS.Rename operation.
1142 */
1143 static int yfs_deliver_fs_rename(struct afs_call *call)
1144 {
1145 const __be32 *bp;
1146 int ret;
1147
1148 _enter("{%u}", call->unmarshall);
1149
1150 ret = afs_transfer_reply(call);
1151 if (ret < 0)
1152 return ret;
1153
1154 bp = call->buffer;
1155 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
1156 if (ret < 0)
1157 return ret;
1158 if (call->out_dir_scb != call->out_scb) {
1159 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
1160 if (ret < 0)
1161 return ret;
1162 }
1163
1164 xdr_decode_YFSVolSync(&bp, call->out_volsync);
1165 _leave(" = 0 [done]");
1166 return 0;
1167 }
1168
1169 /*
1170 * YFS.Rename operation type
1171 */
1172 static const struct afs_call_type yfs_RXYFSRename = {
1173 .name = "FS.Rename",
1174 .op = yfs_FS_Rename,
1175 .deliver = yfs_deliver_fs_rename,
1176 .destructor = afs_flat_call_destructor,
1177 };
1178
1179 /*
1180 * Rename a file or directory.
1181 */
1182 int yfs_fs_rename(struct afs_fs_cursor *fc,
1183 const char *orig_name,
1184 struct afs_vnode *new_dvnode,
1185 const char *new_name,
1186 struct afs_status_cb *orig_dvnode_scb,
1187 struct afs_status_cb *new_dvnode_scb)
1188 {
1189 struct afs_vnode *orig_dvnode = fc->vnode;
1190 struct afs_call *call;
1191 struct afs_net *net = afs_v2net(orig_dvnode);
1192 size_t o_namesz, n_namesz;
1193 __be32 *bp;
1194
1195 _enter("");
1196
1197 o_namesz = strlen(orig_name);
1198 n_namesz = strlen(new_name);
1199 call = afs_alloc_flat_call(net, &yfs_RXYFSRename,
1200 sizeof(__be32) +
1201 sizeof(struct yfs_xdr_RPCFlags) +
1202 sizeof(struct yfs_xdr_YFSFid) +
1203 xdr_strlen(o_namesz) +
1204 sizeof(struct yfs_xdr_YFSFid) +
1205 xdr_strlen(n_namesz),
1206 sizeof(struct yfs_xdr_YFSFetchStatus) +
1207 sizeof(struct yfs_xdr_YFSFetchStatus) +
1208 sizeof(struct yfs_xdr_YFSVolSync));
1209 if (!call)
1210 return -ENOMEM;
1211
1212 call->key = fc->key;
1213 call->out_dir_scb = orig_dvnode_scb;
1214 call->out_scb = new_dvnode_scb;
1215
1216 /* marshall the parameters */
1217 bp = call->request;
1218 bp = xdr_encode_u32(bp, YFSRENAME);
1219 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1220 bp = xdr_encode_YFSFid(bp, &orig_dvnode->fid);
1221 bp = xdr_encode_string(bp, orig_name, o_namesz);
1222 bp = xdr_encode_YFSFid(bp, &new_dvnode->fid);
1223 bp = xdr_encode_string(bp, new_name, n_namesz);
1224 yfs_check_req(call, bp);
1225
1226 afs_use_fs_server(call, fc->cbi);
1227 trace_afs_make_fs_call2(call, &orig_dvnode->fid, orig_name, new_name);
1228 afs_set_fc_call(call, fc);
1229 afs_make_call(&fc->ac, call, GFP_NOFS);
1230 return afs_wait_for_call_to_complete(call, &fc->ac);
1231 }
1232
1233 /*
1234 * YFS.StoreData64 operation type.
1235 */
1236 static const struct afs_call_type yfs_RXYFSStoreData64 = {
1237 .name = "YFS.StoreData64",
1238 .op = yfs_FS_StoreData64,
1239 .deliver = yfs_deliver_status_and_volsync,
1240 .destructor = afs_flat_call_destructor,
1241 };
1242
1243 /*
1244 * Store a set of pages to a large file.
1245 */
1246 int yfs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping,
1247 pgoff_t first, pgoff_t last,
1248 unsigned offset, unsigned to,
1249 struct afs_status_cb *scb)
1250 {
1251 struct afs_vnode *vnode = fc->vnode;
1252 struct afs_call *call;
1253 struct afs_net *net = afs_v2net(vnode);
1254 loff_t size, pos, i_size;
1255 __be32 *bp;
1256
1257 _enter(",%x,{%llx:%llu},,",
1258 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1259
1260 size = (loff_t)to - (loff_t)offset;
1261 if (first != last)
1262 size += (loff_t)(last - first) << PAGE_SHIFT;
1263 pos = (loff_t)first << PAGE_SHIFT;
1264 pos += offset;
1265
1266 i_size = i_size_read(&vnode->vfs_inode);
1267 if (pos + size > i_size)
1268 i_size = size + pos;
1269
1270 _debug("size %llx, at %llx, i_size %llx",
1271 (unsigned long long)size, (unsigned long long)pos,
1272 (unsigned long long)i_size);
1273
1274 call = afs_alloc_flat_call(net, &yfs_RXYFSStoreData64,
1275 sizeof(__be32) +
1276 sizeof(__be32) +
1277 sizeof(struct yfs_xdr_YFSFid) +
1278 sizeof(struct yfs_xdr_YFSStoreStatus) +
1279 sizeof(struct yfs_xdr_u64) * 3,
1280 sizeof(struct yfs_xdr_YFSFetchStatus) +
1281 sizeof(struct yfs_xdr_YFSVolSync));
1282 if (!call)
1283 return -ENOMEM;
1284
1285 call->key = fc->key;
1286 call->mapping = mapping;
1287 call->first = first;
1288 call->last = last;
1289 call->first_offset = offset;
1290 call->last_to = to;
1291 call->send_pages = true;
1292 call->out_scb = scb;
1293
1294 /* marshall the parameters */
1295 bp = call->request;
1296 bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1297 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1298 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1299 bp = xdr_encode_YFSStoreStatus_mtime(bp, &vnode->vfs_inode.i_mtime);
1300 bp = xdr_encode_u64(bp, pos);
1301 bp = xdr_encode_u64(bp, size);
1302 bp = xdr_encode_u64(bp, i_size);
1303 yfs_check_req(call, bp);
1304
1305 afs_use_fs_server(call, fc->cbi);
1306 trace_afs_make_fs_call(call, &vnode->fid);
1307 afs_set_fc_call(call, fc);
1308 afs_make_call(&fc->ac, call, GFP_NOFS);
1309 return afs_wait_for_call_to_complete(call, &fc->ac);
1310 }
1311
1312 /*
1313 * YFS.StoreStatus operation type
1314 */
1315 static const struct afs_call_type yfs_RXYFSStoreStatus = {
1316 .name = "YFS.StoreStatus",
1317 .op = yfs_FS_StoreStatus,
1318 .deliver = yfs_deliver_status_and_volsync,
1319 .destructor = afs_flat_call_destructor,
1320 };
1321
1322 static const struct afs_call_type yfs_RXYFSStoreData64_as_Status = {
1323 .name = "YFS.StoreData64",
1324 .op = yfs_FS_StoreData64,
1325 .deliver = yfs_deliver_status_and_volsync,
1326 .destructor = afs_flat_call_destructor,
1327 };
1328
1329 /*
1330 * Set the attributes on a file, using YFS.StoreData64 rather than
1331 * YFS.StoreStatus so as to alter the file size also.
1332 */
1333 static int yfs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr,
1334 struct afs_status_cb *scb)
1335 {
1336 struct afs_vnode *vnode = fc->vnode;
1337 struct afs_call *call;
1338 struct afs_net *net = afs_v2net(vnode);
1339 __be32 *bp;
1340
1341 _enter(",%x,{%llx:%llu},,",
1342 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1343
1344 call = afs_alloc_flat_call(net, &yfs_RXYFSStoreData64_as_Status,
1345 sizeof(__be32) * 2 +
1346 sizeof(struct yfs_xdr_YFSFid) +
1347 sizeof(struct yfs_xdr_YFSStoreStatus) +
1348 sizeof(struct yfs_xdr_u64) * 3,
1349 sizeof(struct yfs_xdr_YFSFetchStatus) +
1350 sizeof(struct yfs_xdr_YFSVolSync));
1351 if (!call)
1352 return -ENOMEM;
1353
1354 call->key = fc->key;
1355 call->out_scb = scb;
1356
1357 /* marshall the parameters */
1358 bp = call->request;
1359 bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1360 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1361 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1362 bp = xdr_encode_YFS_StoreStatus(bp, attr);
1363 bp = xdr_encode_u64(bp, attr->ia_size); /* position of start of write */
1364 bp = xdr_encode_u64(bp, 0); /* size of write */
1365 bp = xdr_encode_u64(bp, attr->ia_size); /* new file length */
1366 yfs_check_req(call, bp);
1367
1368 afs_use_fs_server(call, fc->cbi);
1369 trace_afs_make_fs_call(call, &vnode->fid);
1370 afs_set_fc_call(call, fc);
1371 afs_make_call(&fc->ac, call, GFP_NOFS);
1372 return afs_wait_for_call_to_complete(call, &fc->ac);
1373 }
1374
1375 /*
1376 * Set the attributes on a file, using YFS.StoreData64 if there's a change in
1377 * file size, and YFS.StoreStatus otherwise.
1378 */
1379 int yfs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr,
1380 struct afs_status_cb *scb)
1381 {
1382 struct afs_vnode *vnode = fc->vnode;
1383 struct afs_call *call;
1384 struct afs_net *net = afs_v2net(vnode);
1385 __be32 *bp;
1386
1387 if (attr->ia_valid & ATTR_SIZE)
1388 return yfs_fs_setattr_size(fc, attr, scb);
1389
1390 _enter(",%x,{%llx:%llu},,",
1391 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1392
1393 call = afs_alloc_flat_call(net, &yfs_RXYFSStoreStatus,
1394 sizeof(__be32) * 2 +
1395 sizeof(struct yfs_xdr_YFSFid) +
1396 sizeof(struct yfs_xdr_YFSStoreStatus),
1397 sizeof(struct yfs_xdr_YFSFetchStatus) +
1398 sizeof(struct yfs_xdr_YFSVolSync));
1399 if (!call)
1400 return -ENOMEM;
1401
1402 call->key = fc->key;
1403 call->out_scb = scb;
1404
1405 /* marshall the parameters */
1406 bp = call->request;
1407 bp = xdr_encode_u32(bp, YFSSTORESTATUS);
1408 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1409 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1410 bp = xdr_encode_YFS_StoreStatus(bp, attr);
1411 yfs_check_req(call, bp);
1412
1413 afs_use_fs_server(call, fc->cbi);
1414 trace_afs_make_fs_call(call, &vnode->fid);
1415 afs_set_fc_call(call, fc);
1416 afs_make_call(&fc->ac, call, GFP_NOFS);
1417 return afs_wait_for_call_to_complete(call, &fc->ac);
1418 }
1419
1420 /*
1421 * Deliver reply data to a YFS.GetVolumeStatus operation.
1422 */
1423 static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
1424 {
1425 const __be32 *bp;
1426 char *p;
1427 u32 size;
1428 int ret;
1429
1430 _enter("{%u}", call->unmarshall);
1431
1432 switch (call->unmarshall) {
1433 case 0:
1434 call->unmarshall++;
1435 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchVolumeStatus));
1436
1437 /* Fall through - and extract the returned status record */
1438 case 1:
1439 _debug("extract status");
1440 ret = afs_extract_data(call, true);
1441 if (ret < 0)
1442 return ret;
1443
1444 bp = call->buffer;
1445 xdr_decode_YFSFetchVolumeStatus(&bp, call->out_volstatus);
1446 call->unmarshall++;
1447 afs_extract_to_tmp(call);
1448
1449 /* Fall through - and extract the volume name length */
1450 case 2:
1451 ret = afs_extract_data(call, true);
1452 if (ret < 0)
1453 return ret;
1454
1455 call->count = ntohl(call->tmp);
1456 _debug("volname length: %u", call->count);
1457 if (call->count >= AFSNAMEMAX)
1458 return afs_protocol_error(call, -EBADMSG,
1459 afs_eproto_volname_len);
1460 size = (call->count + 3) & ~3; /* It's padded */
1461 afs_extract_to_buf(call, size);
1462 call->unmarshall++;
1463
1464 /* Fall through - and extract the volume name */
1465 case 3:
1466 _debug("extract volname");
1467 ret = afs_extract_data(call, true);
1468 if (ret < 0)
1469 return ret;
1470
1471 p = call->buffer;
1472 p[call->count] = 0;
1473 _debug("volname '%s'", p);
1474 afs_extract_to_tmp(call);
1475 call->unmarshall++;
1476
1477 /* Fall through - and extract the offline message length */
1478 case 4:
1479 ret = afs_extract_data(call, true);
1480 if (ret < 0)
1481 return ret;
1482
1483 call->count = ntohl(call->tmp);
1484 _debug("offline msg length: %u", call->count);
1485 if (call->count >= AFSNAMEMAX)
1486 return afs_protocol_error(call, -EBADMSG,
1487 afs_eproto_offline_msg_len);
1488 size = (call->count + 3) & ~3; /* It's padded */
1489 afs_extract_to_buf(call, size);
1490 call->unmarshall++;
1491
1492 /* Fall through - and extract the offline message */
1493 case 5:
1494 _debug("extract offline");
1495 ret = afs_extract_data(call, true);
1496 if (ret < 0)
1497 return ret;
1498
1499 p = call->buffer;
1500 p[call->count] = 0;
1501 _debug("offline '%s'", p);
1502
1503 afs_extract_to_tmp(call);
1504 call->unmarshall++;
1505
1506 /* Fall through - and extract the message of the day length */
1507 case 6:
1508 ret = afs_extract_data(call, true);
1509 if (ret < 0)
1510 return ret;
1511
1512 call->count = ntohl(call->tmp);
1513 _debug("motd length: %u", call->count);
1514 if (call->count >= AFSNAMEMAX)
1515 return afs_protocol_error(call, -EBADMSG,
1516 afs_eproto_motd_len);
1517 size = (call->count + 3) & ~3; /* It's padded */
1518 afs_extract_to_buf(call, size);
1519 call->unmarshall++;
1520
1521 /* Fall through - and extract the message of the day */
1522 case 7:
1523 _debug("extract motd");
1524 ret = afs_extract_data(call, false);
1525 if (ret < 0)
1526 return ret;
1527
1528 p = call->buffer;
1529 p[call->count] = 0;
1530 _debug("motd '%s'", p);
1531
1532 call->unmarshall++;
1533
1534 /* Fall through */
1535 case 8:
1536 break;
1537 }
1538
1539 _leave(" = 0 [done]");
1540 return 0;
1541 }
1542
1543 /*
1544 * YFS.GetVolumeStatus operation type
1545 */
1546 static const struct afs_call_type yfs_RXYFSGetVolumeStatus = {
1547 .name = "YFS.GetVolumeStatus",
1548 .op = yfs_FS_GetVolumeStatus,
1549 .deliver = yfs_deliver_fs_get_volume_status,
1550 .destructor = afs_flat_call_destructor,
1551 };
1552
1553 /*
1554 * fetch the status of a volume
1555 */
1556 int yfs_fs_get_volume_status(struct afs_fs_cursor *fc,
1557 struct afs_volume_status *vs)
1558 {
1559 struct afs_vnode *vnode = fc->vnode;
1560 struct afs_call *call;
1561 struct afs_net *net = afs_v2net(vnode);
1562 __be32 *bp;
1563
1564 _enter("");
1565
1566 call = afs_alloc_flat_call(net, &yfs_RXYFSGetVolumeStatus,
1567 sizeof(__be32) * 2 +
1568 sizeof(struct yfs_xdr_u64),
1569 max_t(size_t,
1570 sizeof(struct yfs_xdr_YFSFetchVolumeStatus) +
1571 sizeof(__be32),
1572 AFSOPAQUEMAX + 1));
1573 if (!call)
1574 return -ENOMEM;
1575
1576 call->key = fc->key;
1577 call->out_volstatus = vs;
1578
1579 /* marshall the parameters */
1580 bp = call->request;
1581 bp = xdr_encode_u32(bp, YFSGETVOLUMESTATUS);
1582 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1583 bp = xdr_encode_u64(bp, vnode->fid.vid);
1584 yfs_check_req(call, bp);
1585
1586 afs_use_fs_server(call, fc->cbi);
1587 trace_afs_make_fs_call(call, &vnode->fid);
1588 afs_set_fc_call(call, fc);
1589 afs_make_call(&fc->ac, call, GFP_NOFS);
1590 return afs_wait_for_call_to_complete(call, &fc->ac);
1591 }
1592
1593 /*
1594 * YFS.SetLock operation type
1595 */
1596 static const struct afs_call_type yfs_RXYFSSetLock = {
1597 .name = "YFS.SetLock",
1598 .op = yfs_FS_SetLock,
1599 .deliver = yfs_deliver_status_and_volsync,
1600 .done = afs_lock_op_done,
1601 .destructor = afs_flat_call_destructor,
1602 };
1603
1604 /*
1605 * YFS.ExtendLock operation type
1606 */
1607 static const struct afs_call_type yfs_RXYFSExtendLock = {
1608 .name = "YFS.ExtendLock",
1609 .op = yfs_FS_ExtendLock,
1610 .deliver = yfs_deliver_status_and_volsync,
1611 .done = afs_lock_op_done,
1612 .destructor = afs_flat_call_destructor,
1613 };
1614
1615 /*
1616 * YFS.ReleaseLock operation type
1617 */
1618 static const struct afs_call_type yfs_RXYFSReleaseLock = {
1619 .name = "YFS.ReleaseLock",
1620 .op = yfs_FS_ReleaseLock,
1621 .deliver = yfs_deliver_status_and_volsync,
1622 .destructor = afs_flat_call_destructor,
1623 };
1624
1625 /*
1626 * Set a lock on a file
1627 */
1628 int yfs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type,
1629 struct afs_status_cb *scb)
1630 {
1631 struct afs_vnode *vnode = fc->vnode;
1632 struct afs_call *call;
1633 struct afs_net *net = afs_v2net(vnode);
1634 __be32 *bp;
1635
1636 _enter("");
1637
1638 call = afs_alloc_flat_call(net, &yfs_RXYFSSetLock,
1639 sizeof(__be32) * 2 +
1640 sizeof(struct yfs_xdr_YFSFid) +
1641 sizeof(__be32),
1642 sizeof(struct yfs_xdr_YFSFetchStatus) +
1643 sizeof(struct yfs_xdr_YFSVolSync));
1644 if (!call)
1645 return -ENOMEM;
1646
1647 call->key = fc->key;
1648 call->lvnode = vnode;
1649 call->out_scb = scb;
1650
1651 /* marshall the parameters */
1652 bp = call->request;
1653 bp = xdr_encode_u32(bp, YFSSETLOCK);
1654 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1655 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1656 bp = xdr_encode_u32(bp, type);
1657 yfs_check_req(call, bp);
1658
1659 afs_use_fs_server(call, fc->cbi);
1660 trace_afs_make_fs_calli(call, &vnode->fid, type);
1661 afs_set_fc_call(call, fc);
1662 afs_make_call(&fc->ac, call, GFP_NOFS);
1663 return afs_wait_for_call_to_complete(call, &fc->ac);
1664 }
1665
1666 /*
1667 * extend a lock on a file
1668 */
1669 int yfs_fs_extend_lock(struct afs_fs_cursor *fc, struct afs_status_cb *scb)
1670 {
1671 struct afs_vnode *vnode = fc->vnode;
1672 struct afs_call *call;
1673 struct afs_net *net = afs_v2net(vnode);
1674 __be32 *bp;
1675
1676 _enter("");
1677
1678 call = afs_alloc_flat_call(net, &yfs_RXYFSExtendLock,
1679 sizeof(__be32) * 2 +
1680 sizeof(struct yfs_xdr_YFSFid),
1681 sizeof(struct yfs_xdr_YFSFetchStatus) +
1682 sizeof(struct yfs_xdr_YFSVolSync));
1683 if (!call)
1684 return -ENOMEM;
1685
1686 call->key = fc->key;
1687 call->lvnode = vnode;
1688 call->out_scb = scb;
1689
1690 /* marshall the parameters */
1691 bp = call->request;
1692 bp = xdr_encode_u32(bp, YFSEXTENDLOCK);
1693 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1694 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1695 yfs_check_req(call, bp);
1696
1697 afs_use_fs_server(call, fc->cbi);
1698 trace_afs_make_fs_call(call, &vnode->fid);
1699 afs_set_fc_call(call, fc);
1700 afs_make_call(&fc->ac, call, GFP_NOFS);
1701 return afs_wait_for_call_to_complete(call, &fc->ac);
1702 }
1703
1704 /*
1705 * release a lock on a file
1706 */
1707 int yfs_fs_release_lock(struct afs_fs_cursor *fc, struct afs_status_cb *scb)
1708 {
1709 struct afs_vnode *vnode = fc->vnode;
1710 struct afs_call *call;
1711 struct afs_net *net = afs_v2net(vnode);
1712 __be32 *bp;
1713
1714 _enter("");
1715
1716 call = afs_alloc_flat_call(net, &yfs_RXYFSReleaseLock,
1717 sizeof(__be32) * 2 +
1718 sizeof(struct yfs_xdr_YFSFid),
1719 sizeof(struct yfs_xdr_YFSFetchStatus) +
1720 sizeof(struct yfs_xdr_YFSVolSync));
1721 if (!call)
1722 return -ENOMEM;
1723
1724 call->key = fc->key;
1725 call->lvnode = vnode;
1726 call->out_scb = scb;
1727
1728 /* marshall the parameters */
1729 bp = call->request;
1730 bp = xdr_encode_u32(bp, YFSRELEASELOCK);
1731 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1732 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1733 yfs_check_req(call, bp);
1734
1735 afs_use_fs_server(call, fc->cbi);
1736 trace_afs_make_fs_call(call, &vnode->fid);
1737 afs_set_fc_call(call, fc);
1738 afs_make_call(&fc->ac, call, GFP_NOFS);
1739 return afs_wait_for_call_to_complete(call, &fc->ac);
1740 }
1741
1742 /*
1743 * YFS.FetchStatus operation type
1744 */
1745 static const struct afs_call_type yfs_RXYFSFetchStatus = {
1746 .name = "YFS.FetchStatus",
1747 .op = yfs_FS_FetchStatus,
1748 .deliver = yfs_deliver_fs_status_cb_and_volsync,
1749 .destructor = afs_flat_call_destructor,
1750 };
1751
1752 /*
1753 * Fetch the status information for a fid without needing a vnode handle.
1754 */
1755 int yfs_fs_fetch_status(struct afs_fs_cursor *fc,
1756 struct afs_net *net,
1757 struct afs_fid *fid,
1758 struct afs_status_cb *scb,
1759 struct afs_volsync *volsync)
1760 {
1761 struct afs_call *call;
1762 __be32 *bp;
1763
1764 _enter(",%x,{%llx:%llu},,",
1765 key_serial(fc->key), fid->vid, fid->vnode);
1766
1767 call = afs_alloc_flat_call(net, &yfs_RXYFSFetchStatus,
1768 sizeof(__be32) * 2 +
1769 sizeof(struct yfs_xdr_YFSFid),
1770 sizeof(struct yfs_xdr_YFSFetchStatus) +
1771 sizeof(struct yfs_xdr_YFSCallBack) +
1772 sizeof(struct yfs_xdr_YFSVolSync));
1773 if (!call) {
1774 fc->ac.error = -ENOMEM;
1775 return -ENOMEM;
1776 }
1777
1778 call->key = fc->key;
1779 call->out_scb = scb;
1780 call->out_volsync = volsync;
1781
1782 /* marshall the parameters */
1783 bp = call->request;
1784 bp = xdr_encode_u32(bp, YFSFETCHSTATUS);
1785 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1786 bp = xdr_encode_YFSFid(bp, fid);
1787 yfs_check_req(call, bp);
1788
1789 afs_use_fs_server(call, fc->cbi);
1790 trace_afs_make_fs_call(call, fid);
1791 afs_set_fc_call(call, fc);
1792 afs_make_call(&fc->ac, call, GFP_NOFS);
1793 return afs_wait_for_call_to_complete(call, &fc->ac);
1794 }
1795
1796 /*
1797 * Deliver reply data to an YFS.InlineBulkStatus call
1798 */
1799 static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
1800 {
1801 struct afs_status_cb *scb;
1802 const __be32 *bp;
1803 u32 tmp;
1804 int ret;
1805
1806 _enter("{%u}", call->unmarshall);
1807
1808 switch (call->unmarshall) {
1809 case 0:
1810 afs_extract_to_tmp(call);
1811 call->unmarshall++;
1812
1813 /* Extract the file status count and array in two steps */
1814 /* Fall through */
1815 case 1:
1816 _debug("extract status count");
1817 ret = afs_extract_data(call, true);
1818 if (ret < 0)
1819 return ret;
1820
1821 tmp = ntohl(call->tmp);
1822 _debug("status count: %u/%u", tmp, call->count2);
1823 if (tmp != call->count2)
1824 return afs_protocol_error(call, -EBADMSG,
1825 afs_eproto_ibulkst_count);
1826
1827 call->count = 0;
1828 call->unmarshall++;
1829 more_counts:
1830 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchStatus));
1831
1832 /* Fall through */
1833 case 2:
1834 _debug("extract status array %u", call->count);
1835 ret = afs_extract_data(call, true);
1836 if (ret < 0)
1837 return ret;
1838
1839 bp = call->buffer;
1840 scb = &call->out_scb[call->count];
1841 ret = xdr_decode_YFSFetchStatus(&bp, call, scb);
1842 if (ret < 0)
1843 return ret;
1844
1845 call->count++;
1846 if (call->count < call->count2)
1847 goto more_counts;
1848
1849 call->count = 0;
1850 call->unmarshall++;
1851 afs_extract_to_tmp(call);
1852
1853 /* Extract the callback count and array in two steps */
1854 /* Fall through */
1855 case 3:
1856 _debug("extract CB count");
1857 ret = afs_extract_data(call, true);
1858 if (ret < 0)
1859 return ret;
1860
1861 tmp = ntohl(call->tmp);
1862 _debug("CB count: %u", tmp);
1863 if (tmp != call->count2)
1864 return afs_protocol_error(call, -EBADMSG,
1865 afs_eproto_ibulkst_cb_count);
1866 call->count = 0;
1867 call->unmarshall++;
1868 more_cbs:
1869 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSCallBack));
1870
1871 /* Fall through */
1872 case 4:
1873 _debug("extract CB array");
1874 ret = afs_extract_data(call, true);
1875 if (ret < 0)
1876 return ret;
1877
1878 _debug("unmarshall CB array");
1879 bp = call->buffer;
1880 scb = &call->out_scb[call->count];
1881 xdr_decode_YFSCallBack(&bp, call, scb);
1882 call->count++;
1883 if (call->count < call->count2)
1884 goto more_cbs;
1885
1886 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSVolSync));
1887 call->unmarshall++;
1888
1889 /* Fall through */
1890 case 5:
1891 ret = afs_extract_data(call, false);
1892 if (ret < 0)
1893 return ret;
1894
1895 bp = call->buffer;
1896 xdr_decode_YFSVolSync(&bp, call->out_volsync);
1897
1898 call->unmarshall++;
1899
1900 /* Fall through */
1901 case 6:
1902 break;
1903 }
1904
1905 _leave(" = 0 [done]");
1906 return 0;
1907 }
1908
1909 /*
1910 * FS.InlineBulkStatus operation type
1911 */
1912 static const struct afs_call_type yfs_RXYFSInlineBulkStatus = {
1913 .name = "YFS.InlineBulkStatus",
1914 .op = yfs_FS_InlineBulkStatus,
1915 .deliver = yfs_deliver_fs_inline_bulk_status,
1916 .destructor = afs_flat_call_destructor,
1917 };
1918
1919 /*
1920 * Fetch the status information for up to 1024 files
1921 */
1922 int yfs_fs_inline_bulk_status(struct afs_fs_cursor *fc,
1923 struct afs_net *net,
1924 struct afs_fid *fids,
1925 struct afs_status_cb *statuses,
1926 unsigned int nr_fids,
1927 struct afs_volsync *volsync)
1928 {
1929 struct afs_call *call;
1930 __be32 *bp;
1931 int i;
1932
1933 _enter(",%x,{%llx:%llu},%u",
1934 key_serial(fc->key), fids[0].vid, fids[1].vnode, nr_fids);
1935
1936 call = afs_alloc_flat_call(net, &yfs_RXYFSInlineBulkStatus,
1937 sizeof(__be32) +
1938 sizeof(__be32) +
1939 sizeof(__be32) +
1940 sizeof(struct yfs_xdr_YFSFid) * nr_fids,
1941 sizeof(struct yfs_xdr_YFSFetchStatus));
1942 if (!call) {
1943 fc->ac.error = -ENOMEM;
1944 return -ENOMEM;
1945 }
1946
1947 call->key = fc->key;
1948 call->out_scb = statuses;
1949 call->out_volsync = volsync;
1950 call->count2 = nr_fids;
1951
1952 /* marshall the parameters */
1953 bp = call->request;
1954 bp = xdr_encode_u32(bp, YFSINLINEBULKSTATUS);
1955 bp = xdr_encode_u32(bp, 0); /* RPCFlags */
1956 bp = xdr_encode_u32(bp, nr_fids);
1957 for (i = 0; i < nr_fids; i++)
1958 bp = xdr_encode_YFSFid(bp, &fids[i]);
1959 yfs_check_req(call, bp);
1960
1961 afs_use_fs_server(call, fc->cbi);
1962 trace_afs_make_fs_call(call, &fids[0]);
1963 afs_set_fc_call(call, fc);
1964 afs_make_call(&fc->ac, call, GFP_NOFS);
1965 return afs_wait_for_call_to_complete(call, &fc->ac);
1966 }
1967
1968 /*
1969 * Deliver reply data to an YFS.FetchOpaqueACL.
1970 */
1971 static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call)
1972 {
1973 struct yfs_acl *yacl = call->out_yacl;
1974 struct afs_acl *acl;
1975 const __be32 *bp;
1976 unsigned int size;
1977 int ret;
1978
1979 _enter("{%u}", call->unmarshall);
1980
1981 switch (call->unmarshall) {
1982 case 0:
1983 afs_extract_to_tmp(call);
1984 call->unmarshall++;
1985
1986 /* Extract the file ACL length */
1987 case 1:
1988 ret = afs_extract_data(call, true);
1989 if (ret < 0)
1990 return ret;
1991
1992 size = call->count2 = ntohl(call->tmp);
1993 size = round_up(size, 4);
1994
1995 if (yacl->flags & YFS_ACL_WANT_ACL) {
1996 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
1997 if (!acl)
1998 return -ENOMEM;
1999 yacl->acl = acl;
2000 acl->size = call->count2;
2001 afs_extract_begin(call, acl->data, size);
2002 } else {
2003 iov_iter_discard(&call->iter, READ, size);
2004 }
2005 call->unmarshall++;
2006
2007 /* Extract the file ACL */
2008 case 2:
2009 ret = afs_extract_data(call, true);
2010 if (ret < 0)
2011 return ret;
2012
2013 afs_extract_to_tmp(call);
2014 call->unmarshall++;
2015
2016 /* Extract the volume ACL length */
2017 case 3:
2018 ret = afs_extract_data(call, true);
2019 if (ret < 0)
2020 return ret;
2021
2022 size = call->count2 = ntohl(call->tmp);
2023 size = round_up(size, 4);
2024
2025 if (yacl->flags & YFS_ACL_WANT_VOL_ACL) {
2026 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
2027 if (!acl)
2028 return -ENOMEM;
2029 yacl->vol_acl = acl;
2030 acl->size = call->count2;
2031 afs_extract_begin(call, acl->data, size);
2032 } else {
2033 iov_iter_discard(&call->iter, READ, size);
2034 }
2035 call->unmarshall++;
2036
2037 /* Extract the volume ACL */
2038 case 4:
2039 ret = afs_extract_data(call, true);
2040 if (ret < 0)
2041 return ret;
2042
2043 afs_extract_to_buf(call,
2044 sizeof(__be32) * 2 +
2045 sizeof(struct yfs_xdr_YFSFetchStatus) +
2046 sizeof(struct yfs_xdr_YFSVolSync));
2047 call->unmarshall++;
2048
2049 /* extract the metadata */
2050 case 5:
2051 ret = afs_extract_data(call, false);
2052 if (ret < 0)
2053 return ret;
2054
2055 bp = call->buffer;
2056 yacl->inherit_flag = ntohl(*bp++);
2057 yacl->num_cleaned = ntohl(*bp++);
2058 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
2059 if (ret < 0)
2060 return ret;
2061 xdr_decode_YFSVolSync(&bp, call->out_volsync);
2062
2063 call->unmarshall++;
2064
2065 case 6:
2066 break;
2067 }
2068
2069 _leave(" = 0 [done]");
2070 return 0;
2071 }
2072
2073 void yfs_free_opaque_acl(struct yfs_acl *yacl)
2074 {
2075 if (yacl) {
2076 kfree(yacl->acl);
2077 kfree(yacl->vol_acl);
2078 kfree(yacl);
2079 }
2080 }
2081
2082 /*
2083 * YFS.FetchOpaqueACL operation type
2084 */
2085 static const struct afs_call_type yfs_RXYFSFetchOpaqueACL = {
2086 .name = "YFS.FetchOpaqueACL",
2087 .op = yfs_FS_FetchOpaqueACL,
2088 .deliver = yfs_deliver_fs_fetch_opaque_acl,
2089 .destructor = afs_flat_call_destructor,
2090 };
2091
2092 /*
2093 * Fetch the YFS advanced ACLs for a file.
2094 */
2095 struct yfs_acl *yfs_fs_fetch_opaque_acl(struct afs_fs_cursor *fc,
2096 struct yfs_acl *yacl,
2097 struct afs_status_cb *scb)
2098 {
2099 struct afs_vnode *vnode = fc->vnode;
2100 struct afs_call *call;
2101 struct afs_net *net = afs_v2net(vnode);
2102 __be32 *bp;
2103
2104 _enter(",%x,{%llx:%llu},,",
2105 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
2106
2107 call = afs_alloc_flat_call(net, &yfs_RXYFSFetchOpaqueACL,
2108 sizeof(__be32) * 2 +
2109 sizeof(struct yfs_xdr_YFSFid),
2110 sizeof(__be32) * 2 +
2111 sizeof(struct yfs_xdr_YFSFetchStatus) +
2112 sizeof(struct yfs_xdr_YFSVolSync));
2113 if (!call) {
2114 fc->ac.error = -ENOMEM;
2115 return ERR_PTR(-ENOMEM);
2116 }
2117
2118 call->key = fc->key;
2119 call->out_yacl = yacl;
2120 call->out_scb = scb;
2121 call->out_volsync = NULL;
2122
2123 /* marshall the parameters */
2124 bp = call->request;
2125 bp = xdr_encode_u32(bp, YFSFETCHOPAQUEACL);
2126 bp = xdr_encode_u32(bp, 0); /* RPC flags */
2127 bp = xdr_encode_YFSFid(bp, &vnode->fid);
2128 yfs_check_req(call, bp);
2129
2130 afs_use_fs_server(call, fc->cbi);
2131 trace_afs_make_fs_call(call, &vnode->fid);
2132 afs_make_call(&fc->ac, call, GFP_KERNEL);
2133 return (struct yfs_acl *)afs_wait_for_call_to_complete(call, &fc->ac);
2134 }
2135
2136 /*
2137 * YFS.StoreOpaqueACL2 operation type
2138 */
2139 static const struct afs_call_type yfs_RXYFSStoreOpaqueACL2 = {
2140 .name = "YFS.StoreOpaqueACL2",
2141 .op = yfs_FS_StoreOpaqueACL2,
2142 .deliver = yfs_deliver_status_and_volsync,
2143 .destructor = afs_flat_call_destructor,
2144 };
2145
2146 /*
2147 * Fetch the YFS ACL for a file.
2148 */
2149 int yfs_fs_store_opaque_acl2(struct afs_fs_cursor *fc, const struct afs_acl *acl,
2150 struct afs_status_cb *scb)
2151 {
2152 struct afs_vnode *vnode = fc->vnode;
2153 struct afs_call *call;
2154 struct afs_net *net = afs_v2net(vnode);
2155 size_t size;
2156 __be32 *bp;
2157
2158 _enter(",%x,{%llx:%llu},,",
2159 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
2160
2161 size = round_up(acl->size, 4);
2162 call = afs_alloc_flat_call(net, &yfs_RXYFSStoreStatus,
2163 sizeof(__be32) * 2 +
2164 sizeof(struct yfs_xdr_YFSFid) +
2165 sizeof(__be32) + size,
2166 sizeof(struct yfs_xdr_YFSFetchStatus) +
2167 sizeof(struct yfs_xdr_YFSVolSync));
2168 if (!call) {
2169 fc->ac.error = -ENOMEM;
2170 return -ENOMEM;
2171 }
2172
2173 call->key = fc->key;
2174 call->out_scb = scb;
2175 call->out_volsync = NULL;
2176
2177 /* marshall the parameters */
2178 bp = call->request;
2179 bp = xdr_encode_u32(bp, YFSSTOREOPAQUEACL2);
2180 bp = xdr_encode_u32(bp, 0); /* RPC flags */
2181 bp = xdr_encode_YFSFid(bp, &vnode->fid);
2182 bp = xdr_encode_u32(bp, acl->size);
2183 memcpy(bp, acl->data, acl->size);
2184 if (acl->size != size)
2185 memset((void *)bp + acl->size, 0, size - acl->size);
2186 yfs_check_req(call, bp);
2187
2188 trace_afs_make_fs_call(call, &vnode->fid);
2189 afs_make_call(&fc->ac, call, GFP_KERNEL);
2190 return afs_wait_for_call_to_complete(call, &fc->ac);
2191 }
Ubuntu Jammy Linux kernel mirror