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 static const struct afs_fid afs_zero_fid;
19
afs_use_fs_server(struct afs_call * call,struct afs_cb_interest * cbi)20 static inline void afs_use_fs_server(struct afs_call *call, struct afs_cb_interest *cbi)
21 {
22 call->cbi = afs_get_cb_interest(cbi);
23 }
24
25 #define xdr_size(x) (sizeof(*x) / sizeof(__be32))
26
xdr_decode_YFSFid(const __be32 ** _bp,struct afs_fid * fid)27 static void xdr_decode_YFSFid(const __be32 **_bp, struct afs_fid *fid)
28 {
29 const struct yfs_xdr_YFSFid *x = (const void *)*_bp;
30
31 fid->vid = xdr_to_u64(x->volume);
32 fid->vnode = xdr_to_u64(x->vnode.lo);
33 fid->vnode_hi = ntohl(x->vnode.hi);
34 fid->unique = ntohl(x->vnode.unique);
35 *_bp += xdr_size(x);
36 }
37
xdr_encode_u32(__be32 * bp,u32 n)38 static __be32 *xdr_encode_u32(__be32 *bp, u32 n)
39 {
40 *bp++ = htonl(n);
41 return bp;
42 }
43
xdr_encode_u64(__be32 * bp,u64 n)44 static __be32 *xdr_encode_u64(__be32 *bp, u64 n)
45 {
46 struct yfs_xdr_u64 *x = (void *)bp;
47
48 *x = u64_to_xdr(n);
49 return bp + xdr_size(x);
50 }
51
xdr_encode_YFSFid(__be32 * bp,struct afs_fid * fid)52 static __be32 *xdr_encode_YFSFid(__be32 *bp, struct afs_fid *fid)
53 {
54 struct yfs_xdr_YFSFid *x = (void *)bp;
55
56 x->volume = u64_to_xdr(fid->vid);
57 x->vnode.lo = u64_to_xdr(fid->vnode);
58 x->vnode.hi = htonl(fid->vnode_hi);
59 x->vnode.unique = htonl(fid->unique);
60 return bp + xdr_size(x);
61 }
62
xdr_strlen(unsigned int len)63 static size_t xdr_strlen(unsigned int len)
64 {
65 return sizeof(__be32) + round_up(len, sizeof(__be32));
66 }
67
xdr_encode_string(__be32 * bp,const char * p,unsigned int len)68 static __be32 *xdr_encode_string(__be32 *bp, const char *p, unsigned int len)
69 {
70 bp = xdr_encode_u32(bp, len);
71 bp = memcpy(bp, p, len);
72 if (len & 3) {
73 unsigned int pad = 4 - (len & 3);
74
75 memset((u8 *)bp + len, 0, pad);
76 len += pad;
77 }
78
79 return bp + len / sizeof(__be32);
80 }
81
linux_to_yfs_time(const struct timespec64 * t)82 static s64 linux_to_yfs_time(const struct timespec64 *t)
83 {
84 /* Convert to 100ns intervals. */
85 return (u64)t->tv_sec * 10000000 + t->tv_nsec/100;
86 }
87
xdr_encode_YFSStoreStatus_mode(__be32 * bp,mode_t mode)88 static __be32 *xdr_encode_YFSStoreStatus_mode(__be32 *bp, mode_t mode)
89 {
90 struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
91
92 x->mask = htonl(AFS_SET_MODE);
93 x->mode = htonl(mode & S_IALLUGO);
94 x->mtime_client = u64_to_xdr(0);
95 x->owner = u64_to_xdr(0);
96 x->group = u64_to_xdr(0);
97 return bp + xdr_size(x);
98 }
99
xdr_encode_YFSStoreStatus_mtime(__be32 * bp,const struct timespec64 * t)100 static __be32 *xdr_encode_YFSStoreStatus_mtime(__be32 *bp, const struct timespec64 *t)
101 {
102 struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
103 s64 mtime = linux_to_yfs_time(t);
104
105 x->mask = htonl(AFS_SET_MTIME);
106 x->mode = htonl(0);
107 x->mtime_client = u64_to_xdr(mtime);
108 x->owner = u64_to_xdr(0);
109 x->group = u64_to_xdr(0);
110 return bp + xdr_size(x);
111 }
112
113 /*
114 * Convert a signed 100ns-resolution 64-bit time into a timespec.
115 */
yfs_time_to_linux(s64 t)116 static struct timespec64 yfs_time_to_linux(s64 t)
117 {
118 struct timespec64 ts;
119 u64 abs_t;
120
121 /*
122 * Unfortunately can not use normal 64 bit division on 32 bit arch, but
123 * the alternative, do_div, does not work with negative numbers so have
124 * to special case them
125 */
126 if (t < 0) {
127 abs_t = -t;
128 ts.tv_nsec = (time64_t)(do_div(abs_t, 10000000) * 100);
129 ts.tv_nsec = -ts.tv_nsec;
130 ts.tv_sec = -abs_t;
131 } else {
132 abs_t = t;
133 ts.tv_nsec = (time64_t)do_div(abs_t, 10000000) * 100;
134 ts.tv_sec = abs_t;
135 }
136
137 return ts;
138 }
139
xdr_to_time(const struct yfs_xdr_u64 xdr)140 static struct timespec64 xdr_to_time(const struct yfs_xdr_u64 xdr)
141 {
142 s64 t = xdr_to_u64(xdr);
143
144 return yfs_time_to_linux(t);
145 }
146
yfs_check_req(struct afs_call * call,__be32 * bp)147 static void yfs_check_req(struct afs_call *call, __be32 *bp)
148 {
149 size_t len = (void *)bp - call->request;
150
151 if (len > call->request_size)
152 pr_err("kAFS: %s: Request buffer overflow (%zu>%u)\n",
153 call->type->name, len, call->request_size);
154 else if (len < call->request_size)
155 pr_warning("kAFS: %s: Request buffer underflow (%zu<%u)\n",
156 call->type->name, len, call->request_size);
157 }
158
159 /*
160 * Dump a bad file status record.
161 */
xdr_dump_bad(const __be32 * bp)162 static void xdr_dump_bad(const __be32 *bp)
163 {
164 __be32 x[4];
165 int i;
166
167 pr_notice("YFS XDR: Bad status record\n");
168 for (i = 0; i < 5 * 4 * 4; i += 16) {
169 memcpy(x, bp, 16);
170 bp += 4;
171 pr_notice("%03x: %08x %08x %08x %08x\n",
172 i, ntohl(x[0]), ntohl(x[1]), ntohl(x[2]), ntohl(x[3]));
173 }
174
175 memcpy(x, bp, 4);
176 pr_notice("0x50: %08x\n", ntohl(x[0]));
177 }
178
179 /*
180 * Decode a YFSFetchStatus block
181 */
xdr_decode_YFSFetchStatus(const __be32 ** _bp,struct afs_call * call,struct afs_status_cb * scb)182 static int xdr_decode_YFSFetchStatus(const __be32 **_bp,
183 struct afs_call *call,
184 struct afs_status_cb *scb)
185 {
186 const struct yfs_xdr_YFSFetchStatus *xdr = (const void *)*_bp;
187 struct afs_file_status *status = &scb->status;
188 u32 type;
189
190 status->abort_code = ntohl(xdr->abort_code);
191 if (status->abort_code != 0) {
192 if (status->abort_code == VNOVNODE)
193 status->nlink = 0;
194 scb->have_error = true;
195 return 0;
196 }
197
198 type = ntohl(xdr->type);
199 switch (type) {
200 case AFS_FTYPE_FILE:
201 case AFS_FTYPE_DIR:
202 case AFS_FTYPE_SYMLINK:
203 status->type = type;
204 break;
205 default:
206 goto bad;
207 }
208
209 status->nlink = ntohl(xdr->nlink);
210 status->author = xdr_to_u64(xdr->author);
211 status->owner = xdr_to_u64(xdr->owner);
212 status->caller_access = ntohl(xdr->caller_access); /* Ticket dependent */
213 status->anon_access = ntohl(xdr->anon_access);
214 status->mode = ntohl(xdr->mode) & S_IALLUGO;
215 status->group = xdr_to_u64(xdr->group);
216 status->lock_count = ntohl(xdr->lock_count);
217
218 status->mtime_client = xdr_to_time(xdr->mtime_client);
219 status->mtime_server = xdr_to_time(xdr->mtime_server);
220 status->size = xdr_to_u64(xdr->size);
221 status->data_version = xdr_to_u64(xdr->data_version);
222 scb->have_status = true;
223
224 *_bp += xdr_size(xdr);
225 return 0;
226
227 bad:
228 xdr_dump_bad(*_bp);
229 return afs_protocol_error(call, -EBADMSG, afs_eproto_bad_status);
230 }
231
232 /*
233 * Decode a YFSCallBack block
234 */
xdr_decode_YFSCallBack(const __be32 ** _bp,struct afs_call * call,struct afs_status_cb * scb)235 static void xdr_decode_YFSCallBack(const __be32 **_bp,
236 struct afs_call *call,
237 struct afs_status_cb *scb)
238 {
239 struct yfs_xdr_YFSCallBack *x = (void *)*_bp;
240 struct afs_callback *cb = &scb->callback;
241 ktime_t cb_expiry;
242
243 cb_expiry = call->reply_time;
244 cb_expiry = ktime_add(cb_expiry, xdr_to_u64(x->expiration_time) * 100);
245 cb->expires_at = ktime_divns(cb_expiry, NSEC_PER_SEC);
246 scb->have_cb = true;
247 *_bp += xdr_size(x);
248 }
249
250 /*
251 * Decode a YFSVolSync block
252 */
xdr_decode_YFSVolSync(const __be32 ** _bp,struct afs_volsync * volsync)253 static void xdr_decode_YFSVolSync(const __be32 **_bp,
254 struct afs_volsync *volsync)
255 {
256 struct yfs_xdr_YFSVolSync *x = (void *)*_bp;
257 u64 creation;
258
259 if (volsync) {
260 creation = xdr_to_u64(x->vol_creation_date);
261 do_div(creation, 10 * 1000 * 1000);
262 volsync->creation = creation;
263 }
264
265 *_bp += xdr_size(x);
266 }
267
268 /*
269 * Encode the requested attributes into a YFSStoreStatus block
270 */
xdr_encode_YFS_StoreStatus(__be32 * bp,struct iattr * attr)271 static __be32 *xdr_encode_YFS_StoreStatus(__be32 *bp, struct iattr *attr)
272 {
273 struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
274 s64 mtime = 0, owner = 0, group = 0;
275 u32 mask = 0, mode = 0;
276
277 mask = 0;
278 if (attr->ia_valid & ATTR_MTIME) {
279 mask |= AFS_SET_MTIME;
280 mtime = linux_to_yfs_time(&attr->ia_mtime);
281 }
282
283 if (attr->ia_valid & ATTR_UID) {
284 mask |= AFS_SET_OWNER;
285 owner = from_kuid(&init_user_ns, attr->ia_uid);
286 }
287
288 if (attr->ia_valid & ATTR_GID) {
289 mask |= AFS_SET_GROUP;
290 group = from_kgid(&init_user_ns, attr->ia_gid);
291 }
292
293 if (attr->ia_valid & ATTR_MODE) {
294 mask |= AFS_SET_MODE;
295 mode = attr->ia_mode & S_IALLUGO;
296 }
297
298 x->mask = htonl(mask);
299 x->mode = htonl(mode);
300 x->mtime_client = u64_to_xdr(mtime);
301 x->owner = u64_to_xdr(owner);
302 x->group = u64_to_xdr(group);
303 return bp + xdr_size(x);
304 }
305
306 /*
307 * Decode a YFSFetchVolumeStatus block.
308 */
xdr_decode_YFSFetchVolumeStatus(const __be32 ** _bp,struct afs_volume_status * vs)309 static void xdr_decode_YFSFetchVolumeStatus(const __be32 **_bp,
310 struct afs_volume_status *vs)
311 {
312 const struct yfs_xdr_YFSFetchVolumeStatus *x = (const void *)*_bp;
313 u32 flags;
314
315 vs->vid = xdr_to_u64(x->vid);
316 vs->parent_id = xdr_to_u64(x->parent_id);
317 flags = ntohl(x->flags);
318 vs->online = flags & yfs_FVSOnline;
319 vs->in_service = flags & yfs_FVSInservice;
320 vs->blessed = flags & yfs_FVSBlessed;
321 vs->needs_salvage = flags & yfs_FVSNeedsSalvage;
322 vs->type = ntohl(x->type);
323 vs->min_quota = 0;
324 vs->max_quota = xdr_to_u64(x->max_quota);
325 vs->blocks_in_use = xdr_to_u64(x->blocks_in_use);
326 vs->part_blocks_avail = xdr_to_u64(x->part_blocks_avail);
327 vs->part_max_blocks = xdr_to_u64(x->part_max_blocks);
328 vs->vol_copy_date = xdr_to_u64(x->vol_copy_date);
329 vs->vol_backup_date = xdr_to_u64(x->vol_backup_date);
330 *_bp += sizeof(*x) / sizeof(__be32);
331 }
332
333 /*
334 * Deliver a reply that's a status, callback and volsync.
335 */
yfs_deliver_fs_status_cb_and_volsync(struct afs_call * call)336 static int yfs_deliver_fs_status_cb_and_volsync(struct afs_call *call)
337 {
338 const __be32 *bp;
339 int ret;
340
341 ret = afs_transfer_reply(call);
342 if (ret < 0)
343 return ret;
344
345 /* unmarshall the reply once we've received all of it */
346 bp = call->buffer;
347 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
348 if (ret < 0)
349 return ret;
350 xdr_decode_YFSCallBack(&bp, call, call->out_scb);
351 xdr_decode_YFSVolSync(&bp, call->out_volsync);
352
353 _leave(" = 0 [done]");
354 return 0;
355 }
356
357 /*
358 * Deliver reply data to operations that just return a file status and a volume
359 * sync record.
360 */
yfs_deliver_status_and_volsync(struct afs_call * call)361 static int yfs_deliver_status_and_volsync(struct afs_call *call)
362 {
363 const __be32 *bp;
364 int ret;
365
366 ret = afs_transfer_reply(call);
367 if (ret < 0)
368 return ret;
369
370 bp = call->buffer;
371 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
372 if (ret < 0)
373 return ret;
374 xdr_decode_YFSVolSync(&bp, call->out_volsync);
375
376 _leave(" = 0 [done]");
377 return 0;
378 }
379
380 /*
381 * YFS.FetchStatus operation type
382 */
383 static const struct afs_call_type yfs_RXYFSFetchStatus_vnode = {
384 .name = "YFS.FetchStatus(vnode)",
385 .op = yfs_FS_FetchStatus,
386 .deliver = yfs_deliver_fs_status_cb_and_volsync,
387 .destructor = afs_flat_call_destructor,
388 };
389
390 /*
391 * Fetch the status information for a file.
392 */
yfs_fs_fetch_file_status(struct afs_fs_cursor * fc,struct afs_status_cb * scb,struct afs_volsync * volsync)393 int yfs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_status_cb *scb,
394 struct afs_volsync *volsync)
395 {
396 struct afs_vnode *vnode = fc->vnode;
397 struct afs_call *call;
398 struct afs_net *net = afs_v2net(vnode);
399 __be32 *bp;
400
401 _enter(",%x,{%llx:%llu},,",
402 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
403
404 call = afs_alloc_flat_call(net, &yfs_RXYFSFetchStatus_vnode,
405 sizeof(__be32) * 2 +
406 sizeof(struct yfs_xdr_YFSFid),
407 sizeof(struct yfs_xdr_YFSFetchStatus) +
408 sizeof(struct yfs_xdr_YFSCallBack) +
409 sizeof(struct yfs_xdr_YFSVolSync));
410 if (!call) {
411 fc->ac.error = -ENOMEM;
412 return -ENOMEM;
413 }
414
415 call->key = fc->key;
416 call->out_scb = scb;
417 call->out_volsync = volsync;
418
419 /* marshall the parameters */
420 bp = call->request;
421 bp = xdr_encode_u32(bp, YFSFETCHSTATUS);
422 bp = xdr_encode_u32(bp, 0); /* RPC flags */
423 bp = xdr_encode_YFSFid(bp, &vnode->fid);
424 yfs_check_req(call, bp);
425
426 afs_use_fs_server(call, fc->cbi);
427 trace_afs_make_fs_call(call, &vnode->fid);
428 afs_set_fc_call(call, fc);
429 afs_make_call(&fc->ac, call, GFP_NOFS);
430 return afs_wait_for_call_to_complete(call, &fc->ac);
431 }
432
433 /*
434 * Deliver reply data to an YFS.FetchData64.
435 */
yfs_deliver_fs_fetch_data64(struct afs_call * call)436 static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
437 {
438 struct afs_read *req = call->read_request;
439 const __be32 *bp;
440 unsigned int size;
441 int ret;
442
443 _enter("{%u,%zu/%llu}",
444 call->unmarshall, iov_iter_count(&call->iter), req->actual_len);
445
446 switch (call->unmarshall) {
447 case 0:
448 req->actual_len = 0;
449 req->index = 0;
450 req->offset = req->pos & (PAGE_SIZE - 1);
451 afs_extract_to_tmp64(call);
452 call->unmarshall++;
453 /* Fall through */
454
455 /* extract the returned data length */
456 case 1:
457 _debug("extract data length");
458 ret = afs_extract_data(call, true);
459 if (ret < 0)
460 return ret;
461
462 req->actual_len = be64_to_cpu(call->tmp64);
463 _debug("DATA length: %llu", req->actual_len);
464 req->remain = min(req->len, req->actual_len);
465 if (req->remain == 0)
466 goto no_more_data;
467
468 call->unmarshall++;
469
470 begin_page:
471 ASSERTCMP(req->index, <, req->nr_pages);
472 if (req->remain > PAGE_SIZE - req->offset)
473 size = PAGE_SIZE - req->offset;
474 else
475 size = req->remain;
476 call->bvec[0].bv_len = size;
477 call->bvec[0].bv_offset = req->offset;
478 call->bvec[0].bv_page = req->pages[req->index];
479 iov_iter_bvec(&call->iter, READ, call->bvec, 1, size);
480 ASSERTCMP(size, <=, PAGE_SIZE);
481 /* Fall through */
482
483 /* extract the returned data */
484 case 2:
485 _debug("extract data %zu/%llu",
486 iov_iter_count(&call->iter), req->remain);
487
488 ret = afs_extract_data(call, true);
489 if (ret < 0)
490 return ret;
491 req->remain -= call->bvec[0].bv_len;
492 req->offset += call->bvec[0].bv_len;
493 ASSERTCMP(req->offset, <=, PAGE_SIZE);
494 if (req->offset == PAGE_SIZE) {
495 req->offset = 0;
496 if (req->page_done)
497 req->page_done(req);
498 req->index++;
499 if (req->remain > 0)
500 goto begin_page;
501 }
502
503 ASSERTCMP(req->remain, ==, 0);
504 if (req->actual_len <= req->len)
505 goto no_more_data;
506
507 /* Discard any excess data the server gave us */
508 afs_extract_discard(call, req->actual_len - req->len);
509 call->unmarshall = 3;
510 /* Fall through */
511
512 case 3:
513 _debug("extract discard %zu/%llu",
514 iov_iter_count(&call->iter), req->actual_len - req->len);
515
516 ret = afs_extract_data(call, true);
517 if (ret < 0)
518 return ret;
519
520 no_more_data:
521 call->unmarshall = 4;
522 afs_extract_to_buf(call,
523 sizeof(struct yfs_xdr_YFSFetchStatus) +
524 sizeof(struct yfs_xdr_YFSCallBack) +
525 sizeof(struct yfs_xdr_YFSVolSync));
526 /* Fall through */
527
528 /* extract the metadata */
529 case 4:
530 ret = afs_extract_data(call, false);
531 if (ret < 0)
532 return ret;
533
534 bp = call->buffer;
535 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
536 if (ret < 0)
537 return ret;
538 xdr_decode_YFSCallBack(&bp, call, call->out_scb);
539 xdr_decode_YFSVolSync(&bp, call->out_volsync);
540
541 req->data_version = call->out_scb->status.data_version;
542 req->file_size = call->out_scb->status.size;
543
544 call->unmarshall++;
545 /* Fall through */
546
547 case 5:
548 break;
549 }
550
551 for (; req->index < req->nr_pages; req->index++) {
552 if (req->offset < PAGE_SIZE)
553 zero_user_segment(req->pages[req->index],
554 req->offset, PAGE_SIZE);
555 if (req->page_done)
556 req->page_done(req);
557 req->offset = 0;
558 }
559
560 _leave(" = 0 [done]");
561 return 0;
562 }
563
yfs_fetch_data_destructor(struct afs_call * call)564 static void yfs_fetch_data_destructor(struct afs_call *call)
565 {
566 afs_put_read(call->read_request);
567 afs_flat_call_destructor(call);
568 }
569
570 /*
571 * YFS.FetchData64 operation type
572 */
573 static const struct afs_call_type yfs_RXYFSFetchData64 = {
574 .name = "YFS.FetchData64",
575 .op = yfs_FS_FetchData64,
576 .deliver = yfs_deliver_fs_fetch_data64,
577 .destructor = yfs_fetch_data_destructor,
578 };
579
580 /*
581 * Fetch data from a file.
582 */
yfs_fs_fetch_data(struct afs_fs_cursor * fc,struct afs_status_cb * scb,struct afs_read * req)583 int yfs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_status_cb *scb,
584 struct afs_read *req)
585 {
586 struct afs_vnode *vnode = fc->vnode;
587 struct afs_call *call;
588 struct afs_net *net = afs_v2net(vnode);
589 __be32 *bp;
590
591 _enter(",%x,{%llx:%llu},%llx,%llx",
592 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode,
593 req->pos, req->len);
594
595 call = afs_alloc_flat_call(net, &yfs_RXYFSFetchData64,
596 sizeof(__be32) * 2 +
597 sizeof(struct yfs_xdr_YFSFid) +
598 sizeof(struct yfs_xdr_u64) * 2,
599 sizeof(struct yfs_xdr_YFSFetchStatus) +
600 sizeof(struct yfs_xdr_YFSCallBack) +
601 sizeof(struct yfs_xdr_YFSVolSync));
602 if (!call)
603 return -ENOMEM;
604
605 call->key = fc->key;
606 call->out_scb = scb;
607 call->out_volsync = NULL;
608 call->read_request = req;
609
610 /* marshall the parameters */
611 bp = call->request;
612 bp = xdr_encode_u32(bp, YFSFETCHDATA64);
613 bp = xdr_encode_u32(bp, 0); /* RPC flags */
614 bp = xdr_encode_YFSFid(bp, &vnode->fid);
615 bp = xdr_encode_u64(bp, req->pos);
616 bp = xdr_encode_u64(bp, req->len);
617 yfs_check_req(call, bp);
618
619 refcount_inc(&req->usage);
620 afs_use_fs_server(call, fc->cbi);
621 trace_afs_make_fs_call(call, &vnode->fid);
622 afs_set_fc_call(call, fc);
623 afs_make_call(&fc->ac, call, GFP_NOFS);
624 return afs_wait_for_call_to_complete(call, &fc->ac);
625 }
626
627 /*
628 * Deliver reply data for YFS.CreateFile or YFS.MakeDir.
629 */
yfs_deliver_fs_create_vnode(struct afs_call * call)630 static int yfs_deliver_fs_create_vnode(struct afs_call *call)
631 {
632 const __be32 *bp;
633 int ret;
634
635 _enter("{%u}", call->unmarshall);
636
637 ret = afs_transfer_reply(call);
638 if (ret < 0)
639 return ret;
640
641 /* unmarshall the reply once we've received all of it */
642 bp = call->buffer;
643 xdr_decode_YFSFid(&bp, call->out_fid);
644 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
645 if (ret < 0)
646 return ret;
647 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
648 if (ret < 0)
649 return ret;
650 xdr_decode_YFSCallBack(&bp, call, call->out_scb);
651 xdr_decode_YFSVolSync(&bp, call->out_volsync);
652
653 _leave(" = 0 [done]");
654 return 0;
655 }
656
657 /*
658 * FS.CreateFile and FS.MakeDir operation type
659 */
660 static const struct afs_call_type afs_RXFSCreateFile = {
661 .name = "YFS.CreateFile",
662 .op = yfs_FS_CreateFile,
663 .deliver = yfs_deliver_fs_create_vnode,
664 .destructor = afs_flat_call_destructor,
665 };
666
667 /*
668 * Create a file.
669 */
yfs_fs_create_file(struct afs_fs_cursor * fc,const char * name,umode_t mode,struct afs_status_cb * dvnode_scb,struct afs_fid * newfid,struct afs_status_cb * new_scb)670 int yfs_fs_create_file(struct afs_fs_cursor *fc,
671 const char *name,
672 umode_t mode,
673 struct afs_status_cb *dvnode_scb,
674 struct afs_fid *newfid,
675 struct afs_status_cb *new_scb)
676 {
677 struct afs_vnode *dvnode = fc->vnode;
678 struct afs_call *call;
679 struct afs_net *net = afs_v2net(dvnode);
680 size_t namesz, reqsz, rplsz;
681 __be32 *bp;
682
683 _enter("");
684
685 namesz = strlen(name);
686 reqsz = (sizeof(__be32) +
687 sizeof(__be32) +
688 sizeof(struct yfs_xdr_YFSFid) +
689 xdr_strlen(namesz) +
690 sizeof(struct yfs_xdr_YFSStoreStatus) +
691 sizeof(__be32));
692 rplsz = (sizeof(struct yfs_xdr_YFSFid) +
693 sizeof(struct yfs_xdr_YFSFetchStatus) +
694 sizeof(struct yfs_xdr_YFSFetchStatus) +
695 sizeof(struct yfs_xdr_YFSCallBack) +
696 sizeof(struct yfs_xdr_YFSVolSync));
697
698 call = afs_alloc_flat_call(net, &afs_RXFSCreateFile, reqsz, rplsz);
699 if (!call)
700 return -ENOMEM;
701
702 call->key = fc->key;
703 call->out_dir_scb = dvnode_scb;
704 call->out_fid = newfid;
705 call->out_scb = new_scb;
706
707 /* marshall the parameters */
708 bp = call->request;
709 bp = xdr_encode_u32(bp, YFSCREATEFILE);
710 bp = xdr_encode_u32(bp, 0); /* RPC flags */
711 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
712 bp = xdr_encode_string(bp, name, namesz);
713 bp = xdr_encode_YFSStoreStatus_mode(bp, mode);
714 bp = xdr_encode_u32(bp, yfs_LockNone); /* ViceLockType */
715 yfs_check_req(call, bp);
716
717 afs_use_fs_server(call, fc->cbi);
718 trace_afs_make_fs_call1(call, &dvnode->fid, name);
719 afs_set_fc_call(call, fc);
720 afs_make_call(&fc->ac, call, GFP_NOFS);
721 return afs_wait_for_call_to_complete(call, &fc->ac);
722 }
723
724 static const struct afs_call_type yfs_RXFSMakeDir = {
725 .name = "YFS.MakeDir",
726 .op = yfs_FS_MakeDir,
727 .deliver = yfs_deliver_fs_create_vnode,
728 .destructor = afs_flat_call_destructor,
729 };
730
731 /*
732 * Make a directory.
733 */
yfs_fs_make_dir(struct afs_fs_cursor * fc,const char * name,umode_t mode,struct afs_status_cb * dvnode_scb,struct afs_fid * newfid,struct afs_status_cb * new_scb)734 int yfs_fs_make_dir(struct afs_fs_cursor *fc,
735 const char *name,
736 umode_t mode,
737 struct afs_status_cb *dvnode_scb,
738 struct afs_fid *newfid,
739 struct afs_status_cb *new_scb)
740 {
741 struct afs_vnode *dvnode = fc->vnode;
742 struct afs_call *call;
743 struct afs_net *net = afs_v2net(dvnode);
744 size_t namesz, reqsz, rplsz;
745 __be32 *bp;
746
747 _enter("");
748
749 namesz = strlen(name);
750 reqsz = (sizeof(__be32) +
751 sizeof(struct yfs_xdr_RPCFlags) +
752 sizeof(struct yfs_xdr_YFSFid) +
753 xdr_strlen(namesz) +
754 sizeof(struct yfs_xdr_YFSStoreStatus));
755 rplsz = (sizeof(struct yfs_xdr_YFSFid) +
756 sizeof(struct yfs_xdr_YFSFetchStatus) +
757 sizeof(struct yfs_xdr_YFSFetchStatus) +
758 sizeof(struct yfs_xdr_YFSCallBack) +
759 sizeof(struct yfs_xdr_YFSVolSync));
760
761 call = afs_alloc_flat_call(net, &yfs_RXFSMakeDir, reqsz, rplsz);
762 if (!call)
763 return -ENOMEM;
764
765 call->key = fc->key;
766 call->out_dir_scb = dvnode_scb;
767 call->out_fid = newfid;
768 call->out_scb = new_scb;
769
770 /* marshall the parameters */
771 bp = call->request;
772 bp = xdr_encode_u32(bp, YFSMAKEDIR);
773 bp = xdr_encode_u32(bp, 0); /* RPC flags */
774 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
775 bp = xdr_encode_string(bp, name, namesz);
776 bp = xdr_encode_YFSStoreStatus_mode(bp, mode);
777 yfs_check_req(call, bp);
778
779 afs_use_fs_server(call, fc->cbi);
780 trace_afs_make_fs_call1(call, &dvnode->fid, name);
781 afs_set_fc_call(call, fc);
782 afs_make_call(&fc->ac, call, GFP_NOFS);
783 return afs_wait_for_call_to_complete(call, &fc->ac);
784 }
785
786 /*
787 * Deliver reply data to a YFS.RemoveFile2 operation.
788 */
yfs_deliver_fs_remove_file2(struct afs_call * call)789 static int yfs_deliver_fs_remove_file2(struct afs_call *call)
790 {
791 struct afs_fid fid;
792 const __be32 *bp;
793 int ret;
794
795 _enter("{%u}", call->unmarshall);
796
797 ret = afs_transfer_reply(call);
798 if (ret < 0)
799 return ret;
800
801 bp = call->buffer;
802 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
803 if (ret < 0)
804 return ret;
805
806 xdr_decode_YFSFid(&bp, &fid);
807 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
808 if (ret < 0)
809 return ret;
810 /* Was deleted if vnode->status.abort_code == VNOVNODE. */
811
812 xdr_decode_YFSVolSync(&bp, call->out_volsync);
813 return 0;
814 }
815
816 /*
817 * YFS.RemoveFile2 operation type.
818 */
819 static const struct afs_call_type yfs_RXYFSRemoveFile2 = {
820 .name = "YFS.RemoveFile2",
821 .op = yfs_FS_RemoveFile2,
822 .deliver = yfs_deliver_fs_remove_file2,
823 .destructor = afs_flat_call_destructor,
824 };
825
826 /*
827 * Remove a file and retrieve new file status.
828 */
yfs_fs_remove_file2(struct afs_fs_cursor * fc,struct afs_vnode * vnode,const char * name,struct afs_status_cb * dvnode_scb,struct afs_status_cb * vnode_scb)829 int yfs_fs_remove_file2(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
830 const char *name, struct afs_status_cb *dvnode_scb,
831 struct afs_status_cb *vnode_scb)
832 {
833 struct afs_vnode *dvnode = fc->vnode;
834 struct afs_call *call;
835 struct afs_net *net = afs_v2net(dvnode);
836 size_t namesz;
837 __be32 *bp;
838
839 _enter("");
840
841 namesz = strlen(name);
842
843 call = afs_alloc_flat_call(net, &yfs_RXYFSRemoveFile2,
844 sizeof(__be32) +
845 sizeof(struct yfs_xdr_RPCFlags) +
846 sizeof(struct yfs_xdr_YFSFid) +
847 xdr_strlen(namesz),
848 sizeof(struct yfs_xdr_YFSFetchStatus) +
849 sizeof(struct yfs_xdr_YFSFid) +
850 sizeof(struct yfs_xdr_YFSFetchStatus) +
851 sizeof(struct yfs_xdr_YFSVolSync));
852 if (!call)
853 return -ENOMEM;
854
855 call->key = fc->key;
856 call->out_dir_scb = dvnode_scb;
857 call->out_scb = vnode_scb;
858
859 /* marshall the parameters */
860 bp = call->request;
861 bp = xdr_encode_u32(bp, YFSREMOVEFILE2);
862 bp = xdr_encode_u32(bp, 0); /* RPC flags */
863 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
864 bp = xdr_encode_string(bp, name, namesz);
865 yfs_check_req(call, bp);
866
867 afs_use_fs_server(call, fc->cbi);
868 trace_afs_make_fs_call1(call, &dvnode->fid, name);
869 afs_set_fc_call(call, fc);
870 afs_make_call(&fc->ac, call, GFP_NOFS);
871 return afs_wait_for_call_to_complete(call, &fc->ac);
872 }
873
874 /*
875 * Deliver reply data to a YFS.RemoveFile or YFS.RemoveDir operation.
876 */
yfs_deliver_fs_remove(struct afs_call * call)877 static int yfs_deliver_fs_remove(struct afs_call *call)
878 {
879 const __be32 *bp;
880 int ret;
881
882 _enter("{%u}", call->unmarshall);
883
884 ret = afs_transfer_reply(call);
885 if (ret < 0)
886 return ret;
887
888 bp = call->buffer;
889 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
890 if (ret < 0)
891 return ret;
892
893 xdr_decode_YFSVolSync(&bp, call->out_volsync);
894 return 0;
895 }
896
897 /*
898 * FS.RemoveDir and FS.RemoveFile operation types.
899 */
900 static const struct afs_call_type yfs_RXYFSRemoveFile = {
901 .name = "YFS.RemoveFile",
902 .op = yfs_FS_RemoveFile,
903 .deliver = yfs_deliver_fs_remove,
904 .destructor = afs_flat_call_destructor,
905 };
906
907 static const struct afs_call_type yfs_RXYFSRemoveDir = {
908 .name = "YFS.RemoveDir",
909 .op = yfs_FS_RemoveDir,
910 .deliver = yfs_deliver_fs_remove,
911 .destructor = afs_flat_call_destructor,
912 };
913
914 /*
915 * remove a file or directory
916 */
yfs_fs_remove(struct afs_fs_cursor * fc,struct afs_vnode * vnode,const char * name,bool isdir,struct afs_status_cb * dvnode_scb)917 int yfs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
918 const char *name, bool isdir,
919 struct afs_status_cb *dvnode_scb)
920 {
921 struct afs_vnode *dvnode = fc->vnode;
922 struct afs_call *call;
923 struct afs_net *net = afs_v2net(dvnode);
924 size_t namesz;
925 __be32 *bp;
926
927 _enter("");
928
929 namesz = strlen(name);
930 call = afs_alloc_flat_call(
931 net, isdir ? &yfs_RXYFSRemoveDir : &yfs_RXYFSRemoveFile,
932 sizeof(__be32) +
933 sizeof(struct yfs_xdr_RPCFlags) +
934 sizeof(struct yfs_xdr_YFSFid) +
935 xdr_strlen(namesz),
936 sizeof(struct yfs_xdr_YFSFetchStatus) +
937 sizeof(struct yfs_xdr_YFSVolSync));
938 if (!call)
939 return -ENOMEM;
940
941 call->key = fc->key;
942 call->out_dir_scb = dvnode_scb;
943
944 /* marshall the parameters */
945 bp = call->request;
946 bp = xdr_encode_u32(bp, isdir ? YFSREMOVEDIR : YFSREMOVEFILE);
947 bp = xdr_encode_u32(bp, 0); /* RPC flags */
948 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
949 bp = xdr_encode_string(bp, name, namesz);
950 yfs_check_req(call, bp);
951
952 afs_use_fs_server(call, fc->cbi);
953 trace_afs_make_fs_call1(call, &dvnode->fid, name);
954 afs_set_fc_call(call, fc);
955 afs_make_call(&fc->ac, call, GFP_NOFS);
956 return afs_wait_for_call_to_complete(call, &fc->ac);
957 }
958
959 /*
960 * Deliver reply data to a YFS.Link operation.
961 */
yfs_deliver_fs_link(struct afs_call * call)962 static int yfs_deliver_fs_link(struct afs_call *call)
963 {
964 const __be32 *bp;
965 int ret;
966
967 _enter("{%u}", call->unmarshall);
968
969 ret = afs_transfer_reply(call);
970 if (ret < 0)
971 return ret;
972
973 bp = call->buffer;
974 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
975 if (ret < 0)
976 return ret;
977 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
978 if (ret < 0)
979 return ret;
980 xdr_decode_YFSVolSync(&bp, call->out_volsync);
981 _leave(" = 0 [done]");
982 return 0;
983 }
984
985 /*
986 * YFS.Link operation type.
987 */
988 static const struct afs_call_type yfs_RXYFSLink = {
989 .name = "YFS.Link",
990 .op = yfs_FS_Link,
991 .deliver = yfs_deliver_fs_link,
992 .destructor = afs_flat_call_destructor,
993 };
994
995 /*
996 * Make a hard link.
997 */
yfs_fs_link(struct afs_fs_cursor * fc,struct afs_vnode * vnode,const char * name,struct afs_status_cb * dvnode_scb,struct afs_status_cb * vnode_scb)998 int yfs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
999 const char *name,
1000 struct afs_status_cb *dvnode_scb,
1001 struct afs_status_cb *vnode_scb)
1002 {
1003 struct afs_vnode *dvnode = fc->vnode;
1004 struct afs_call *call;
1005 struct afs_net *net = afs_v2net(vnode);
1006 size_t namesz;
1007 __be32 *bp;
1008
1009 _enter("");
1010
1011 namesz = strlen(name);
1012 call = afs_alloc_flat_call(net, &yfs_RXYFSLink,
1013 sizeof(__be32) +
1014 sizeof(struct yfs_xdr_RPCFlags) +
1015 sizeof(struct yfs_xdr_YFSFid) +
1016 xdr_strlen(namesz) +
1017 sizeof(struct yfs_xdr_YFSFid),
1018 sizeof(struct yfs_xdr_YFSFetchStatus) +
1019 sizeof(struct yfs_xdr_YFSFetchStatus) +
1020 sizeof(struct yfs_xdr_YFSVolSync));
1021 if (!call)
1022 return -ENOMEM;
1023
1024 call->key = fc->key;
1025 call->out_dir_scb = dvnode_scb;
1026 call->out_scb = vnode_scb;
1027
1028 /* marshall the parameters */
1029 bp = call->request;
1030 bp = xdr_encode_u32(bp, YFSLINK);
1031 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1032 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
1033 bp = xdr_encode_string(bp, name, namesz);
1034 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1035 yfs_check_req(call, bp);
1036
1037 afs_use_fs_server(call, fc->cbi);
1038 trace_afs_make_fs_call1(call, &vnode->fid, name);
1039 afs_set_fc_call(call, fc);
1040 afs_make_call(&fc->ac, call, GFP_NOFS);
1041 return afs_wait_for_call_to_complete(call, &fc->ac);
1042 }
1043
1044 /*
1045 * Deliver reply data to a YFS.Symlink operation.
1046 */
yfs_deliver_fs_symlink(struct afs_call * call)1047 static int yfs_deliver_fs_symlink(struct afs_call *call)
1048 {
1049 const __be32 *bp;
1050 int ret;
1051
1052 _enter("{%u}", call->unmarshall);
1053
1054 ret = afs_transfer_reply(call);
1055 if (ret < 0)
1056 return ret;
1057
1058 /* unmarshall the reply once we've received all of it */
1059 bp = call->buffer;
1060 xdr_decode_YFSFid(&bp, call->out_fid);
1061 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
1062 if (ret < 0)
1063 return ret;
1064 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
1065 if (ret < 0)
1066 return ret;
1067 xdr_decode_YFSVolSync(&bp, call->out_volsync);
1068
1069 _leave(" = 0 [done]");
1070 return 0;
1071 }
1072
1073 /*
1074 * YFS.Symlink operation type
1075 */
1076 static const struct afs_call_type yfs_RXYFSSymlink = {
1077 .name = "YFS.Symlink",
1078 .op = yfs_FS_Symlink,
1079 .deliver = yfs_deliver_fs_symlink,
1080 .destructor = afs_flat_call_destructor,
1081 };
1082
1083 /*
1084 * Create a symbolic link.
1085 */
yfs_fs_symlink(struct afs_fs_cursor * fc,const char * name,const char * contents,struct afs_status_cb * dvnode_scb,struct afs_fid * newfid,struct afs_status_cb * vnode_scb)1086 int yfs_fs_symlink(struct afs_fs_cursor *fc,
1087 const char *name,
1088 const char *contents,
1089 struct afs_status_cb *dvnode_scb,
1090 struct afs_fid *newfid,
1091 struct afs_status_cb *vnode_scb)
1092 {
1093 struct afs_vnode *dvnode = fc->vnode;
1094 struct afs_call *call;
1095 struct afs_net *net = afs_v2net(dvnode);
1096 size_t namesz, contents_sz;
1097 __be32 *bp;
1098
1099 _enter("");
1100
1101 namesz = strlen(name);
1102 contents_sz = strlen(contents);
1103 call = afs_alloc_flat_call(net, &yfs_RXYFSSymlink,
1104 sizeof(__be32) +
1105 sizeof(struct yfs_xdr_RPCFlags) +
1106 sizeof(struct yfs_xdr_YFSFid) +
1107 xdr_strlen(namesz) +
1108 xdr_strlen(contents_sz) +
1109 sizeof(struct yfs_xdr_YFSStoreStatus),
1110 sizeof(struct yfs_xdr_YFSFid) +
1111 sizeof(struct yfs_xdr_YFSFetchStatus) +
1112 sizeof(struct yfs_xdr_YFSFetchStatus) +
1113 sizeof(struct yfs_xdr_YFSVolSync));
1114 if (!call)
1115 return -ENOMEM;
1116
1117 call->key = fc->key;
1118 call->out_dir_scb = dvnode_scb;
1119 call->out_fid = newfid;
1120 call->out_scb = vnode_scb;
1121
1122 /* marshall the parameters */
1123 bp = call->request;
1124 bp = xdr_encode_u32(bp, YFSSYMLINK);
1125 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1126 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
1127 bp = xdr_encode_string(bp, name, namesz);
1128 bp = xdr_encode_string(bp, contents, contents_sz);
1129 bp = xdr_encode_YFSStoreStatus_mode(bp, S_IRWXUGO);
1130 yfs_check_req(call, bp);
1131
1132 afs_use_fs_server(call, fc->cbi);
1133 trace_afs_make_fs_call1(call, &dvnode->fid, name);
1134 afs_set_fc_call(call, fc);
1135 afs_make_call(&fc->ac, call, GFP_NOFS);
1136 return afs_wait_for_call_to_complete(call, &fc->ac);
1137 }
1138
1139 /*
1140 * Deliver reply data to a YFS.Rename operation.
1141 */
yfs_deliver_fs_rename(struct afs_call * call)1142 static int yfs_deliver_fs_rename(struct afs_call *call)
1143 {
1144 const __be32 *bp;
1145 int ret;
1146
1147 _enter("{%u}", call->unmarshall);
1148
1149 ret = afs_transfer_reply(call);
1150 if (ret < 0)
1151 return ret;
1152
1153 bp = call->buffer;
1154 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
1155 if (ret < 0)
1156 return ret;
1157 if (call->out_dir_scb != call->out_scb) {
1158 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
1159 if (ret < 0)
1160 return ret;
1161 }
1162
1163 xdr_decode_YFSVolSync(&bp, call->out_volsync);
1164 _leave(" = 0 [done]");
1165 return 0;
1166 }
1167
1168 /*
1169 * YFS.Rename operation type
1170 */
1171 static const struct afs_call_type yfs_RXYFSRename = {
1172 .name = "FS.Rename",
1173 .op = yfs_FS_Rename,
1174 .deliver = yfs_deliver_fs_rename,
1175 .destructor = afs_flat_call_destructor,
1176 };
1177
1178 /*
1179 * Rename a file or directory.
1180 */
yfs_fs_rename(struct afs_fs_cursor * fc,const char * orig_name,struct afs_vnode * new_dvnode,const char * new_name,struct afs_status_cb * orig_dvnode_scb,struct afs_status_cb * new_dvnode_scb)1181 int yfs_fs_rename(struct afs_fs_cursor *fc,
1182 const char *orig_name,
1183 struct afs_vnode *new_dvnode,
1184 const char *new_name,
1185 struct afs_status_cb *orig_dvnode_scb,
1186 struct afs_status_cb *new_dvnode_scb)
1187 {
1188 struct afs_vnode *orig_dvnode = fc->vnode;
1189 struct afs_call *call;
1190 struct afs_net *net = afs_v2net(orig_dvnode);
1191 size_t o_namesz, n_namesz;
1192 __be32 *bp;
1193
1194 _enter("");
1195
1196 o_namesz = strlen(orig_name);
1197 n_namesz = strlen(new_name);
1198 call = afs_alloc_flat_call(net, &yfs_RXYFSRename,
1199 sizeof(__be32) +
1200 sizeof(struct yfs_xdr_RPCFlags) +
1201 sizeof(struct yfs_xdr_YFSFid) +
1202 xdr_strlen(o_namesz) +
1203 sizeof(struct yfs_xdr_YFSFid) +
1204 xdr_strlen(n_namesz),
1205 sizeof(struct yfs_xdr_YFSFetchStatus) +
1206 sizeof(struct yfs_xdr_YFSFetchStatus) +
1207 sizeof(struct yfs_xdr_YFSVolSync));
1208 if (!call)
1209 return -ENOMEM;
1210
1211 call->key = fc->key;
1212 call->out_dir_scb = orig_dvnode_scb;
1213 call->out_scb = new_dvnode_scb;
1214
1215 /* marshall the parameters */
1216 bp = call->request;
1217 bp = xdr_encode_u32(bp, YFSRENAME);
1218 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1219 bp = xdr_encode_YFSFid(bp, &orig_dvnode->fid);
1220 bp = xdr_encode_string(bp, orig_name, o_namesz);
1221 bp = xdr_encode_YFSFid(bp, &new_dvnode->fid);
1222 bp = xdr_encode_string(bp, new_name, n_namesz);
1223 yfs_check_req(call, bp);
1224
1225 afs_use_fs_server(call, fc->cbi);
1226 trace_afs_make_fs_call2(call, &orig_dvnode->fid, orig_name, new_name);
1227 afs_set_fc_call(call, fc);
1228 afs_make_call(&fc->ac, call, GFP_NOFS);
1229 return afs_wait_for_call_to_complete(call, &fc->ac);
1230 }
1231
1232 /*
1233 * YFS.StoreData64 operation type.
1234 */
1235 static const struct afs_call_type yfs_RXYFSStoreData64 = {
1236 .name = "YFS.StoreData64",
1237 .op = yfs_FS_StoreData64,
1238 .deliver = yfs_deliver_status_and_volsync,
1239 .destructor = afs_flat_call_destructor,
1240 };
1241
1242 /*
1243 * Store a set of pages to a large file.
1244 */
yfs_fs_store_data(struct afs_fs_cursor * fc,struct address_space * mapping,pgoff_t first,pgoff_t last,unsigned offset,unsigned to,struct afs_status_cb * scb)1245 int yfs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping,
1246 pgoff_t first, pgoff_t last,
1247 unsigned offset, unsigned to,
1248 struct afs_status_cb *scb)
1249 {
1250 struct afs_vnode *vnode = fc->vnode;
1251 struct afs_call *call;
1252 struct afs_net *net = afs_v2net(vnode);
1253 loff_t size, pos, i_size;
1254 __be32 *bp;
1255
1256 _enter(",%x,{%llx:%llu},,",
1257 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1258
1259 size = (loff_t)to - (loff_t)offset;
1260 if (first != last)
1261 size += (loff_t)(last - first) << PAGE_SHIFT;
1262 pos = (loff_t)first << PAGE_SHIFT;
1263 pos += offset;
1264
1265 i_size = i_size_read(&vnode->vfs_inode);
1266 if (pos + size > i_size)
1267 i_size = size + pos;
1268
1269 _debug("size %llx, at %llx, i_size %llx",
1270 (unsigned long long)size, (unsigned long long)pos,
1271 (unsigned long long)i_size);
1272
1273 call = afs_alloc_flat_call(net, &yfs_RXYFSStoreData64,
1274 sizeof(__be32) +
1275 sizeof(__be32) +
1276 sizeof(struct yfs_xdr_YFSFid) +
1277 sizeof(struct yfs_xdr_YFSStoreStatus) +
1278 sizeof(struct yfs_xdr_u64) * 3,
1279 sizeof(struct yfs_xdr_YFSFetchStatus) +
1280 sizeof(struct yfs_xdr_YFSVolSync));
1281 if (!call)
1282 return -ENOMEM;
1283
1284 call->key = fc->key;
1285 call->mapping = mapping;
1286 call->first = first;
1287 call->last = last;
1288 call->first_offset = offset;
1289 call->last_to = to;
1290 call->send_pages = true;
1291 call->out_scb = scb;
1292
1293 /* marshall the parameters */
1294 bp = call->request;
1295 bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1296 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1297 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1298 bp = xdr_encode_YFSStoreStatus_mtime(bp, &vnode->vfs_inode.i_mtime);
1299 bp = xdr_encode_u64(bp, pos);
1300 bp = xdr_encode_u64(bp, size);
1301 bp = xdr_encode_u64(bp, i_size);
1302 yfs_check_req(call, bp);
1303
1304 afs_use_fs_server(call, fc->cbi);
1305 trace_afs_make_fs_call(call, &vnode->fid);
1306 afs_set_fc_call(call, fc);
1307 afs_make_call(&fc->ac, call, GFP_NOFS);
1308 return afs_wait_for_call_to_complete(call, &fc->ac);
1309 }
1310
1311 /*
1312 * YFS.StoreStatus operation type
1313 */
1314 static const struct afs_call_type yfs_RXYFSStoreStatus = {
1315 .name = "YFS.StoreStatus",
1316 .op = yfs_FS_StoreStatus,
1317 .deliver = yfs_deliver_status_and_volsync,
1318 .destructor = afs_flat_call_destructor,
1319 };
1320
1321 static const struct afs_call_type yfs_RXYFSStoreData64_as_Status = {
1322 .name = "YFS.StoreData64",
1323 .op = yfs_FS_StoreData64,
1324 .deliver = yfs_deliver_status_and_volsync,
1325 .destructor = afs_flat_call_destructor,
1326 };
1327
1328 /*
1329 * Set the attributes on a file, using YFS.StoreData64 rather than
1330 * YFS.StoreStatus so as to alter the file size also.
1331 */
yfs_fs_setattr_size(struct afs_fs_cursor * fc,struct iattr * attr,struct afs_status_cb * scb)1332 static int yfs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr,
1333 struct afs_status_cb *scb)
1334 {
1335 struct afs_vnode *vnode = fc->vnode;
1336 struct afs_call *call;
1337 struct afs_net *net = afs_v2net(vnode);
1338 __be32 *bp;
1339
1340 _enter(",%x,{%llx:%llu},,",
1341 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1342
1343 call = afs_alloc_flat_call(net, &yfs_RXYFSStoreData64_as_Status,
1344 sizeof(__be32) * 2 +
1345 sizeof(struct yfs_xdr_YFSFid) +
1346 sizeof(struct yfs_xdr_YFSStoreStatus) +
1347 sizeof(struct yfs_xdr_u64) * 3,
1348 sizeof(struct yfs_xdr_YFSFetchStatus) +
1349 sizeof(struct yfs_xdr_YFSVolSync));
1350 if (!call)
1351 return -ENOMEM;
1352
1353 call->key = fc->key;
1354 call->out_scb = scb;
1355
1356 /* marshall the parameters */
1357 bp = call->request;
1358 bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1359 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1360 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1361 bp = xdr_encode_YFS_StoreStatus(bp, attr);
1362 bp = xdr_encode_u64(bp, attr->ia_size); /* position of start of write */
1363 bp = xdr_encode_u64(bp, 0); /* size of write */
1364 bp = xdr_encode_u64(bp, attr->ia_size); /* new file length */
1365 yfs_check_req(call, bp);
1366
1367 afs_use_fs_server(call, fc->cbi);
1368 trace_afs_make_fs_call(call, &vnode->fid);
1369 afs_set_fc_call(call, fc);
1370 afs_make_call(&fc->ac, call, GFP_NOFS);
1371 return afs_wait_for_call_to_complete(call, &fc->ac);
1372 }
1373
1374 /*
1375 * Set the attributes on a file, using YFS.StoreData64 if there's a change in
1376 * file size, and YFS.StoreStatus otherwise.
1377 */
yfs_fs_setattr(struct afs_fs_cursor * fc,struct iattr * attr,struct afs_status_cb * scb)1378 int yfs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr,
1379 struct afs_status_cb *scb)
1380 {
1381 struct afs_vnode *vnode = fc->vnode;
1382 struct afs_call *call;
1383 struct afs_net *net = afs_v2net(vnode);
1384 __be32 *bp;
1385
1386 if (attr->ia_valid & ATTR_SIZE)
1387 return yfs_fs_setattr_size(fc, attr, scb);
1388
1389 _enter(",%x,{%llx:%llu},,",
1390 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1391
1392 call = afs_alloc_flat_call(net, &yfs_RXYFSStoreStatus,
1393 sizeof(__be32) * 2 +
1394 sizeof(struct yfs_xdr_YFSFid) +
1395 sizeof(struct yfs_xdr_YFSStoreStatus),
1396 sizeof(struct yfs_xdr_YFSFetchStatus) +
1397 sizeof(struct yfs_xdr_YFSVolSync));
1398 if (!call)
1399 return -ENOMEM;
1400
1401 call->key = fc->key;
1402 call->out_scb = scb;
1403
1404 /* marshall the parameters */
1405 bp = call->request;
1406 bp = xdr_encode_u32(bp, YFSSTORESTATUS);
1407 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1408 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1409 bp = xdr_encode_YFS_StoreStatus(bp, attr);
1410 yfs_check_req(call, bp);
1411
1412 afs_use_fs_server(call, fc->cbi);
1413 trace_afs_make_fs_call(call, &vnode->fid);
1414 afs_set_fc_call(call, fc);
1415 afs_make_call(&fc->ac, call, GFP_NOFS);
1416 return afs_wait_for_call_to_complete(call, &fc->ac);
1417 }
1418
1419 /*
1420 * Deliver reply data to a YFS.GetVolumeStatus operation.
1421 */
yfs_deliver_fs_get_volume_status(struct afs_call * call)1422 static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
1423 {
1424 const __be32 *bp;
1425 char *p;
1426 u32 size;
1427 int ret;
1428
1429 _enter("{%u}", call->unmarshall);
1430
1431 switch (call->unmarshall) {
1432 case 0:
1433 call->unmarshall++;
1434 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchVolumeStatus));
1435 /* Fall through */
1436
1437 /* extract the returned status record */
1438 case 1:
1439 _debug("extract status");
1440 ret = afs_extract_data(call, true);
1441 if (ret < 0)
1442 return ret;
1443
1444 bp = call->buffer;
1445 xdr_decode_YFSFetchVolumeStatus(&bp, call->out_volstatus);
1446 call->unmarshall++;
1447 afs_extract_to_tmp(call);
1448 /* Fall through */
1449
1450 /* extract the volume name length */
1451 case 2:
1452 ret = afs_extract_data(call, true);
1453 if (ret < 0)
1454 return ret;
1455
1456 call->count = ntohl(call->tmp);
1457 _debug("volname length: %u", call->count);
1458 if (call->count >= AFSNAMEMAX)
1459 return afs_protocol_error(call, -EBADMSG,
1460 afs_eproto_volname_len);
1461 size = (call->count + 3) & ~3; /* It's padded */
1462 afs_extract_to_buf(call, size);
1463 call->unmarshall++;
1464 /* Fall through */
1465
1466 /* extract the volume name */
1467 case 3:
1468 _debug("extract volname");
1469 ret = afs_extract_data(call, true);
1470 if (ret < 0)
1471 return ret;
1472
1473 p = call->buffer;
1474 p[call->count] = 0;
1475 _debug("volname '%s'", p);
1476 afs_extract_to_tmp(call);
1477 call->unmarshall++;
1478 /* Fall through */
1479
1480 /* extract the offline message length */
1481 case 4:
1482 ret = afs_extract_data(call, true);
1483 if (ret < 0)
1484 return ret;
1485
1486 call->count = ntohl(call->tmp);
1487 _debug("offline msg length: %u", call->count);
1488 if (call->count >= AFSNAMEMAX)
1489 return afs_protocol_error(call, -EBADMSG,
1490 afs_eproto_offline_msg_len);
1491 size = (call->count + 3) & ~3; /* It's padded */
1492 afs_extract_to_buf(call, size);
1493 call->unmarshall++;
1494 /* Fall through */
1495
1496 /* extract the offline message */
1497 case 5:
1498 _debug("extract offline");
1499 ret = afs_extract_data(call, true);
1500 if (ret < 0)
1501 return ret;
1502
1503 p = call->buffer;
1504 p[call->count] = 0;
1505 _debug("offline '%s'", p);
1506
1507 afs_extract_to_tmp(call);
1508 call->unmarshall++;
1509 /* Fall through */
1510
1511 /* extract the message of the day length */
1512 case 6:
1513 ret = afs_extract_data(call, true);
1514 if (ret < 0)
1515 return ret;
1516
1517 call->count = ntohl(call->tmp);
1518 _debug("motd length: %u", call->count);
1519 if (call->count >= AFSNAMEMAX)
1520 return afs_protocol_error(call, -EBADMSG,
1521 afs_eproto_motd_len);
1522 size = (call->count + 3) & ~3; /* It's padded */
1523 afs_extract_to_buf(call, size);
1524 call->unmarshall++;
1525 /* Fall through */
1526
1527 /* extract the message of the day */
1528 case 7:
1529 _debug("extract motd");
1530 ret = afs_extract_data(call, false);
1531 if (ret < 0)
1532 return ret;
1533
1534 p = call->buffer;
1535 p[call->count] = 0;
1536 _debug("motd '%s'", p);
1537
1538 call->unmarshall++;
1539 /* Fall through */
1540
1541 case 8:
1542 break;
1543 }
1544
1545 _leave(" = 0 [done]");
1546 return 0;
1547 }
1548
1549 /*
1550 * YFS.GetVolumeStatus operation type
1551 */
1552 static const struct afs_call_type yfs_RXYFSGetVolumeStatus = {
1553 .name = "YFS.GetVolumeStatus",
1554 .op = yfs_FS_GetVolumeStatus,
1555 .deliver = yfs_deliver_fs_get_volume_status,
1556 .destructor = afs_flat_call_destructor,
1557 };
1558
1559 /*
1560 * fetch the status of a volume
1561 */
yfs_fs_get_volume_status(struct afs_fs_cursor * fc,struct afs_volume_status * vs)1562 int yfs_fs_get_volume_status(struct afs_fs_cursor *fc,
1563 struct afs_volume_status *vs)
1564 {
1565 struct afs_vnode *vnode = fc->vnode;
1566 struct afs_call *call;
1567 struct afs_net *net = afs_v2net(vnode);
1568 __be32 *bp;
1569
1570 _enter("");
1571
1572 call = afs_alloc_flat_call(net, &yfs_RXYFSGetVolumeStatus,
1573 sizeof(__be32) * 2 +
1574 sizeof(struct yfs_xdr_u64),
1575 max_t(size_t,
1576 sizeof(struct yfs_xdr_YFSFetchVolumeStatus) +
1577 sizeof(__be32),
1578 AFSOPAQUEMAX + 1));
1579 if (!call)
1580 return -ENOMEM;
1581
1582 call->key = fc->key;
1583 call->out_volstatus = vs;
1584
1585 /* marshall the parameters */
1586 bp = call->request;
1587 bp = xdr_encode_u32(bp, YFSGETVOLUMESTATUS);
1588 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1589 bp = xdr_encode_u64(bp, vnode->fid.vid);
1590 yfs_check_req(call, bp);
1591
1592 afs_use_fs_server(call, fc->cbi);
1593 trace_afs_make_fs_call(call, &vnode->fid);
1594 afs_set_fc_call(call, fc);
1595 afs_make_call(&fc->ac, call, GFP_NOFS);
1596 return afs_wait_for_call_to_complete(call, &fc->ac);
1597 }
1598
1599 /*
1600 * YFS.SetLock operation type
1601 */
1602 static const struct afs_call_type yfs_RXYFSSetLock = {
1603 .name = "YFS.SetLock",
1604 .op = yfs_FS_SetLock,
1605 .deliver = yfs_deliver_status_and_volsync,
1606 .done = afs_lock_op_done,
1607 .destructor = afs_flat_call_destructor,
1608 };
1609
1610 /*
1611 * YFS.ExtendLock operation type
1612 */
1613 static const struct afs_call_type yfs_RXYFSExtendLock = {
1614 .name = "YFS.ExtendLock",
1615 .op = yfs_FS_ExtendLock,
1616 .deliver = yfs_deliver_status_and_volsync,
1617 .done = afs_lock_op_done,
1618 .destructor = afs_flat_call_destructor,
1619 };
1620
1621 /*
1622 * YFS.ReleaseLock operation type
1623 */
1624 static const struct afs_call_type yfs_RXYFSReleaseLock = {
1625 .name = "YFS.ReleaseLock",
1626 .op = yfs_FS_ReleaseLock,
1627 .deliver = yfs_deliver_status_and_volsync,
1628 .destructor = afs_flat_call_destructor,
1629 };
1630
1631 /*
1632 * Set a lock on a file
1633 */
yfs_fs_set_lock(struct afs_fs_cursor * fc,afs_lock_type_t type,struct afs_status_cb * scb)1634 int yfs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type,
1635 struct afs_status_cb *scb)
1636 {
1637 struct afs_vnode *vnode = fc->vnode;
1638 struct afs_call *call;
1639 struct afs_net *net = afs_v2net(vnode);
1640 __be32 *bp;
1641
1642 _enter("");
1643
1644 call = afs_alloc_flat_call(net, &yfs_RXYFSSetLock,
1645 sizeof(__be32) * 2 +
1646 sizeof(struct yfs_xdr_YFSFid) +
1647 sizeof(__be32),
1648 sizeof(struct yfs_xdr_YFSFetchStatus) +
1649 sizeof(struct yfs_xdr_YFSVolSync));
1650 if (!call)
1651 return -ENOMEM;
1652
1653 call->key = fc->key;
1654 call->lvnode = vnode;
1655 call->out_scb = scb;
1656
1657 /* marshall the parameters */
1658 bp = call->request;
1659 bp = xdr_encode_u32(bp, YFSSETLOCK);
1660 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1661 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1662 bp = xdr_encode_u32(bp, type);
1663 yfs_check_req(call, bp);
1664
1665 afs_use_fs_server(call, fc->cbi);
1666 trace_afs_make_fs_calli(call, &vnode->fid, type);
1667 afs_set_fc_call(call, fc);
1668 afs_make_call(&fc->ac, call, GFP_NOFS);
1669 return afs_wait_for_call_to_complete(call, &fc->ac);
1670 }
1671
1672 /*
1673 * extend a lock on a file
1674 */
yfs_fs_extend_lock(struct afs_fs_cursor * fc,struct afs_status_cb * scb)1675 int yfs_fs_extend_lock(struct afs_fs_cursor *fc, struct afs_status_cb *scb)
1676 {
1677 struct afs_vnode *vnode = fc->vnode;
1678 struct afs_call *call;
1679 struct afs_net *net = afs_v2net(vnode);
1680 __be32 *bp;
1681
1682 _enter("");
1683
1684 call = afs_alloc_flat_call(net, &yfs_RXYFSExtendLock,
1685 sizeof(__be32) * 2 +
1686 sizeof(struct yfs_xdr_YFSFid),
1687 sizeof(struct yfs_xdr_YFSFetchStatus) +
1688 sizeof(struct yfs_xdr_YFSVolSync));
1689 if (!call)
1690 return -ENOMEM;
1691
1692 call->key = fc->key;
1693 call->lvnode = vnode;
1694 call->out_scb = scb;
1695
1696 /* marshall the parameters */
1697 bp = call->request;
1698 bp = xdr_encode_u32(bp, YFSEXTENDLOCK);
1699 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1700 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1701 yfs_check_req(call, bp);
1702
1703 afs_use_fs_server(call, fc->cbi);
1704 trace_afs_make_fs_call(call, &vnode->fid);
1705 afs_set_fc_call(call, fc);
1706 afs_make_call(&fc->ac, call, GFP_NOFS);
1707 return afs_wait_for_call_to_complete(call, &fc->ac);
1708 }
1709
1710 /*
1711 * release a lock on a file
1712 */
yfs_fs_release_lock(struct afs_fs_cursor * fc,struct afs_status_cb * scb)1713 int yfs_fs_release_lock(struct afs_fs_cursor *fc, struct afs_status_cb *scb)
1714 {
1715 struct afs_vnode *vnode = fc->vnode;
1716 struct afs_call *call;
1717 struct afs_net *net = afs_v2net(vnode);
1718 __be32 *bp;
1719
1720 _enter("");
1721
1722 call = afs_alloc_flat_call(net, &yfs_RXYFSReleaseLock,
1723 sizeof(__be32) * 2 +
1724 sizeof(struct yfs_xdr_YFSFid),
1725 sizeof(struct yfs_xdr_YFSFetchStatus) +
1726 sizeof(struct yfs_xdr_YFSVolSync));
1727 if (!call)
1728 return -ENOMEM;
1729
1730 call->key = fc->key;
1731 call->lvnode = vnode;
1732 call->out_scb = scb;
1733
1734 /* marshall the parameters */
1735 bp = call->request;
1736 bp = xdr_encode_u32(bp, YFSRELEASELOCK);
1737 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1738 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1739 yfs_check_req(call, bp);
1740
1741 afs_use_fs_server(call, fc->cbi);
1742 trace_afs_make_fs_call(call, &vnode->fid);
1743 afs_set_fc_call(call, fc);
1744 afs_make_call(&fc->ac, call, GFP_NOFS);
1745 return afs_wait_for_call_to_complete(call, &fc->ac);
1746 }
1747
1748 /*
1749 * YFS.FetchStatus operation type
1750 */
1751 static const struct afs_call_type yfs_RXYFSFetchStatus = {
1752 .name = "YFS.FetchStatus",
1753 .op = yfs_FS_FetchStatus,
1754 .deliver = yfs_deliver_fs_status_cb_and_volsync,
1755 .destructor = afs_flat_call_destructor,
1756 };
1757
1758 /*
1759 * Fetch the status information for a fid without needing a vnode handle.
1760 */
yfs_fs_fetch_status(struct afs_fs_cursor * fc,struct afs_net * net,struct afs_fid * fid,struct afs_status_cb * scb,struct afs_volsync * volsync)1761 int yfs_fs_fetch_status(struct afs_fs_cursor *fc,
1762 struct afs_net *net,
1763 struct afs_fid *fid,
1764 struct afs_status_cb *scb,
1765 struct afs_volsync *volsync)
1766 {
1767 struct afs_call *call;
1768 __be32 *bp;
1769
1770 _enter(",%x,{%llx:%llu},,",
1771 key_serial(fc->key), fid->vid, fid->vnode);
1772
1773 call = afs_alloc_flat_call(net, &yfs_RXYFSFetchStatus,
1774 sizeof(__be32) * 2 +
1775 sizeof(struct yfs_xdr_YFSFid),
1776 sizeof(struct yfs_xdr_YFSFetchStatus) +
1777 sizeof(struct yfs_xdr_YFSCallBack) +
1778 sizeof(struct yfs_xdr_YFSVolSync));
1779 if (!call) {
1780 fc->ac.error = -ENOMEM;
1781 return -ENOMEM;
1782 }
1783
1784 call->key = fc->key;
1785 call->out_scb = scb;
1786 call->out_volsync = volsync;
1787
1788 /* marshall the parameters */
1789 bp = call->request;
1790 bp = xdr_encode_u32(bp, YFSFETCHSTATUS);
1791 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1792 bp = xdr_encode_YFSFid(bp, fid);
1793 yfs_check_req(call, bp);
1794
1795 afs_use_fs_server(call, fc->cbi);
1796 trace_afs_make_fs_call(call, fid);
1797 afs_set_fc_call(call, fc);
1798 afs_make_call(&fc->ac, call, GFP_NOFS);
1799 return afs_wait_for_call_to_complete(call, &fc->ac);
1800 }
1801
1802 /*
1803 * Deliver reply data to an YFS.InlineBulkStatus call
1804 */
yfs_deliver_fs_inline_bulk_status(struct afs_call * call)1805 static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
1806 {
1807 struct afs_status_cb *scb;
1808 const __be32 *bp;
1809 u32 tmp;
1810 int ret;
1811
1812 _enter("{%u}", call->unmarshall);
1813
1814 switch (call->unmarshall) {
1815 case 0:
1816 afs_extract_to_tmp(call);
1817 call->unmarshall++;
1818 /* Fall through */
1819
1820 /* Extract the file status count and array in two steps */
1821 case 1:
1822 _debug("extract status count");
1823 ret = afs_extract_data(call, true);
1824 if (ret < 0)
1825 return ret;
1826
1827 tmp = ntohl(call->tmp);
1828 _debug("status count: %u/%u", tmp, call->count2);
1829 if (tmp != call->count2)
1830 return afs_protocol_error(call, -EBADMSG,
1831 afs_eproto_ibulkst_count);
1832
1833 call->count = 0;
1834 call->unmarshall++;
1835 more_counts:
1836 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchStatus));
1837 /* Fall through */
1838
1839 case 2:
1840 _debug("extract status array %u", call->count);
1841 ret = afs_extract_data(call, true);
1842 if (ret < 0)
1843 return ret;
1844
1845 bp = call->buffer;
1846 scb = &call->out_scb[call->count];
1847 ret = xdr_decode_YFSFetchStatus(&bp, call, scb);
1848 if (ret < 0)
1849 return ret;
1850
1851 call->count++;
1852 if (call->count < call->count2)
1853 goto more_counts;
1854
1855 call->count = 0;
1856 call->unmarshall++;
1857 afs_extract_to_tmp(call);
1858 /* Fall through */
1859
1860 /* Extract the callback count and array in two steps */
1861 case 3:
1862 _debug("extract CB count");
1863 ret = afs_extract_data(call, true);
1864 if (ret < 0)
1865 return ret;
1866
1867 tmp = ntohl(call->tmp);
1868 _debug("CB count: %u", tmp);
1869 if (tmp != call->count2)
1870 return afs_protocol_error(call, -EBADMSG,
1871 afs_eproto_ibulkst_cb_count);
1872 call->count = 0;
1873 call->unmarshall++;
1874 more_cbs:
1875 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSCallBack));
1876 /* Fall through */
1877
1878 case 4:
1879 _debug("extract CB array");
1880 ret = afs_extract_data(call, true);
1881 if (ret < 0)
1882 return ret;
1883
1884 _debug("unmarshall CB array");
1885 bp = call->buffer;
1886 scb = &call->out_scb[call->count];
1887 xdr_decode_YFSCallBack(&bp, call, scb);
1888 call->count++;
1889 if (call->count < call->count2)
1890 goto more_cbs;
1891
1892 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSVolSync));
1893 call->unmarshall++;
1894 /* Fall through */
1895
1896 case 5:
1897 ret = afs_extract_data(call, false);
1898 if (ret < 0)
1899 return ret;
1900
1901 bp = call->buffer;
1902 xdr_decode_YFSVolSync(&bp, call->out_volsync);
1903
1904 call->unmarshall++;
1905 /* Fall through */
1906
1907 case 6:
1908 break;
1909 }
1910
1911 _leave(" = 0 [done]");
1912 return 0;
1913 }
1914
1915 /*
1916 * FS.InlineBulkStatus operation type
1917 */
1918 static const struct afs_call_type yfs_RXYFSInlineBulkStatus = {
1919 .name = "YFS.InlineBulkStatus",
1920 .op = yfs_FS_InlineBulkStatus,
1921 .deliver = yfs_deliver_fs_inline_bulk_status,
1922 .destructor = afs_flat_call_destructor,
1923 };
1924
1925 /*
1926 * Fetch the status information for up to 1024 files
1927 */
yfs_fs_inline_bulk_status(struct afs_fs_cursor * fc,struct afs_net * net,struct afs_fid * fids,struct afs_status_cb * statuses,unsigned int nr_fids,struct afs_volsync * volsync)1928 int yfs_fs_inline_bulk_status(struct afs_fs_cursor *fc,
1929 struct afs_net *net,
1930 struct afs_fid *fids,
1931 struct afs_status_cb *statuses,
1932 unsigned int nr_fids,
1933 struct afs_volsync *volsync)
1934 {
1935 struct afs_call *call;
1936 __be32 *bp;
1937 int i;
1938
1939 _enter(",%x,{%llx:%llu},%u",
1940 key_serial(fc->key), fids[0].vid, fids[1].vnode, nr_fids);
1941
1942 call = afs_alloc_flat_call(net, &yfs_RXYFSInlineBulkStatus,
1943 sizeof(__be32) +
1944 sizeof(__be32) +
1945 sizeof(__be32) +
1946 sizeof(struct yfs_xdr_YFSFid) * nr_fids,
1947 sizeof(struct yfs_xdr_YFSFetchStatus));
1948 if (!call) {
1949 fc->ac.error = -ENOMEM;
1950 return -ENOMEM;
1951 }
1952
1953 call->key = fc->key;
1954 call->out_scb = statuses;
1955 call->out_volsync = volsync;
1956 call->count2 = nr_fids;
1957
1958 /* marshall the parameters */
1959 bp = call->request;
1960 bp = xdr_encode_u32(bp, YFSINLINEBULKSTATUS);
1961 bp = xdr_encode_u32(bp, 0); /* RPCFlags */
1962 bp = xdr_encode_u32(bp, nr_fids);
1963 for (i = 0; i < nr_fids; i++)
1964 bp = xdr_encode_YFSFid(bp, &fids[i]);
1965 yfs_check_req(call, bp);
1966
1967 afs_use_fs_server(call, fc->cbi);
1968 trace_afs_make_fs_call(call, &fids[0]);
1969 afs_set_fc_call(call, fc);
1970 afs_make_call(&fc->ac, call, GFP_NOFS);
1971 return afs_wait_for_call_to_complete(call, &fc->ac);
1972 }
1973
1974 /*
1975 * Deliver reply data to an YFS.FetchOpaqueACL.
1976 */
yfs_deliver_fs_fetch_opaque_acl(struct afs_call * call)1977 static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call)
1978 {
1979 struct yfs_acl *yacl = call->out_yacl;
1980 struct afs_acl *acl;
1981 const __be32 *bp;
1982 unsigned int size;
1983 int ret;
1984
1985 _enter("{%u}", call->unmarshall);
1986
1987 switch (call->unmarshall) {
1988 case 0:
1989 afs_extract_to_tmp(call);
1990 call->unmarshall++;
1991 /* Fall through */
1992
1993 /* Extract the file ACL length */
1994 case 1:
1995 ret = afs_extract_data(call, true);
1996 if (ret < 0)
1997 return ret;
1998
1999 size = call->count2 = ntohl(call->tmp);
2000 size = round_up(size, 4);
2001
2002 if (yacl->flags & YFS_ACL_WANT_ACL) {
2003 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
2004 if (!acl)
2005 return -ENOMEM;
2006 yacl->acl = acl;
2007 acl->size = call->count2;
2008 afs_extract_begin(call, acl->data, size);
2009 } else {
2010 afs_extract_discard(call, size);
2011 }
2012 call->unmarshall++;
2013 /* Fall through */
2014
2015 /* Extract the file ACL */
2016 case 2:
2017 ret = afs_extract_data(call, true);
2018 if (ret < 0)
2019 return ret;
2020
2021 afs_extract_to_tmp(call);
2022 call->unmarshall++;
2023 /* Fall through */
2024
2025 /* Extract the volume ACL length */
2026 case 3:
2027 ret = afs_extract_data(call, true);
2028 if (ret < 0)
2029 return ret;
2030
2031 size = call->count2 = ntohl(call->tmp);
2032 size = round_up(size, 4);
2033
2034 if (yacl->flags & YFS_ACL_WANT_VOL_ACL) {
2035 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
2036 if (!acl)
2037 return -ENOMEM;
2038 yacl->vol_acl = acl;
2039 acl->size = call->count2;
2040 afs_extract_begin(call, acl->data, size);
2041 } else {
2042 afs_extract_discard(call, size);
2043 }
2044 call->unmarshall++;
2045 /* Fall through */
2046
2047 /* Extract the volume ACL */
2048 case 4:
2049 ret = afs_extract_data(call, true);
2050 if (ret < 0)
2051 return ret;
2052
2053 afs_extract_to_buf(call,
2054 sizeof(__be32) * 2 +
2055 sizeof(struct yfs_xdr_YFSFetchStatus) +
2056 sizeof(struct yfs_xdr_YFSVolSync));
2057 call->unmarshall++;
2058 /* Fall through */
2059
2060 /* extract the metadata */
2061 case 5:
2062 ret = afs_extract_data(call, false);
2063 if (ret < 0)
2064 return ret;
2065
2066 bp = call->buffer;
2067 yacl->inherit_flag = ntohl(*bp++);
2068 yacl->num_cleaned = ntohl(*bp++);
2069 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
2070 if (ret < 0)
2071 return ret;
2072 xdr_decode_YFSVolSync(&bp, call->out_volsync);
2073
2074 call->unmarshall++;
2075 /* Fall through */
2076
2077 case 6:
2078 break;
2079 }
2080
2081 _leave(" = 0 [done]");
2082 return 0;
2083 }
2084
yfs_free_opaque_acl(struct yfs_acl * yacl)2085 void yfs_free_opaque_acl(struct yfs_acl *yacl)
2086 {
2087 if (yacl) {
2088 kfree(yacl->acl);
2089 kfree(yacl->vol_acl);
2090 kfree(yacl);
2091 }
2092 }
2093
2094 /*
2095 * YFS.FetchOpaqueACL operation type
2096 */
2097 static const struct afs_call_type yfs_RXYFSFetchOpaqueACL = {
2098 .name = "YFS.FetchOpaqueACL",
2099 .op = yfs_FS_FetchOpaqueACL,
2100 .deliver = yfs_deliver_fs_fetch_opaque_acl,
2101 .destructor = afs_flat_call_destructor,
2102 };
2103
2104 /*
2105 * Fetch the YFS advanced ACLs for a file.
2106 */
yfs_fs_fetch_opaque_acl(struct afs_fs_cursor * fc,struct yfs_acl * yacl,struct afs_status_cb * scb)2107 struct yfs_acl *yfs_fs_fetch_opaque_acl(struct afs_fs_cursor *fc,
2108 struct yfs_acl *yacl,
2109 struct afs_status_cb *scb)
2110 {
2111 struct afs_vnode *vnode = fc->vnode;
2112 struct afs_call *call;
2113 struct afs_net *net = afs_v2net(vnode);
2114 __be32 *bp;
2115
2116 _enter(",%x,{%llx:%llu},,",
2117 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
2118
2119 call = afs_alloc_flat_call(net, &yfs_RXYFSFetchOpaqueACL,
2120 sizeof(__be32) * 2 +
2121 sizeof(struct yfs_xdr_YFSFid),
2122 sizeof(__be32) * 2 +
2123 sizeof(struct yfs_xdr_YFSFetchStatus) +
2124 sizeof(struct yfs_xdr_YFSVolSync));
2125 if (!call) {
2126 fc->ac.error = -ENOMEM;
2127 return ERR_PTR(-ENOMEM);
2128 }
2129
2130 call->key = fc->key;
2131 call->out_yacl = yacl;
2132 call->out_scb = scb;
2133 call->out_volsync = NULL;
2134
2135 /* marshall the parameters */
2136 bp = call->request;
2137 bp = xdr_encode_u32(bp, YFSFETCHOPAQUEACL);
2138 bp = xdr_encode_u32(bp, 0); /* RPC flags */
2139 bp = xdr_encode_YFSFid(bp, &vnode->fid);
2140 yfs_check_req(call, bp);
2141
2142 afs_use_fs_server(call, fc->cbi);
2143 trace_afs_make_fs_call(call, &vnode->fid);
2144 afs_make_call(&fc->ac, call, GFP_KERNEL);
2145 return (struct yfs_acl *)afs_wait_for_call_to_complete(call, &fc->ac);
2146 }
2147
2148 /*
2149 * YFS.StoreOpaqueACL2 operation type
2150 */
2151 static const struct afs_call_type yfs_RXYFSStoreOpaqueACL2 = {
2152 .name = "YFS.StoreOpaqueACL2",
2153 .op = yfs_FS_StoreOpaqueACL2,
2154 .deliver = yfs_deliver_status_and_volsync,
2155 .destructor = afs_flat_call_destructor,
2156 };
2157
2158 /*
2159 * Fetch the YFS ACL for a file.
2160 */
yfs_fs_store_opaque_acl2(struct afs_fs_cursor * fc,const struct afs_acl * acl,struct afs_status_cb * scb)2161 int yfs_fs_store_opaque_acl2(struct afs_fs_cursor *fc, const struct afs_acl *acl,
2162 struct afs_status_cb *scb)
2163 {
2164 struct afs_vnode *vnode = fc->vnode;
2165 struct afs_call *call;
2166 struct afs_net *net = afs_v2net(vnode);
2167 size_t size;
2168 __be32 *bp;
2169
2170 _enter(",%x,{%llx:%llu},,",
2171 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
2172
2173 size = round_up(acl->size, 4);
2174 call = afs_alloc_flat_call(net, &yfs_RXYFSStoreOpaqueACL2,
2175 sizeof(__be32) * 2 +
2176 sizeof(struct yfs_xdr_YFSFid) +
2177 sizeof(__be32) + size,
2178 sizeof(struct yfs_xdr_YFSFetchStatus) +
2179 sizeof(struct yfs_xdr_YFSVolSync));
2180 if (!call) {
2181 fc->ac.error = -ENOMEM;
2182 return -ENOMEM;
2183 }
2184
2185 call->key = fc->key;
2186 call->out_scb = scb;
2187 call->out_volsync = NULL;
2188
2189 /* marshall the parameters */
2190 bp = call->request;
2191 bp = xdr_encode_u32(bp, YFSSTOREOPAQUEACL2);
2192 bp = xdr_encode_u32(bp, 0); /* RPC flags */
2193 bp = xdr_encode_YFSFid(bp, &vnode->fid);
2194 bp = xdr_encode_u32(bp, acl->size);
2195 memcpy(bp, acl->data, acl->size);
2196 if (acl->size != size)
2197 memset((void *)bp + acl->size, 0, size - acl->size);
2198 yfs_check_req(call, bp);
2199
2200 trace_afs_make_fs_call(call, &vnode->fid);
2201 afs_make_call(&fc->ac, call, GFP_KERNEL);
2202 return afs_wait_for_call_to_complete(call, &fc->ac);
2203 }
2204
