1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* YFS File Server client stubs
3 *
4 * Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
6 */
7
8 #include <linux/init.h>
9 #include <linux/slab.h>
10 #include <linux/sched.h>
11 #include <linux/circ_buf.h>
12 #include <linux/iversion.h>
13 #include "internal.h"
14 #include "afs_fs.h"
15 #include "xdr_fs.h"
16 #include "protocol_yfs.h"
17
18 #define xdr_size(x) (sizeof(*x) / sizeof(__be32))
19
xdr_decode_YFSFid(const __be32 ** _bp,struct afs_fid * fid)20 static void xdr_decode_YFSFid(const __be32 **_bp, struct afs_fid *fid)
21 {
22 const struct yfs_xdr_YFSFid *x = (const void *)*_bp;
23
24 fid->vid = xdr_to_u64(x->volume);
25 fid->vnode = xdr_to_u64(x->vnode.lo);
26 fid->vnode_hi = ntohl(x->vnode.hi);
27 fid->unique = ntohl(x->vnode.unique);
28 *_bp += xdr_size(x);
29 }
30
xdr_encode_u32(__be32 * bp,u32 n)31 static __be32 *xdr_encode_u32(__be32 *bp, u32 n)
32 {
33 *bp++ = htonl(n);
34 return bp;
35 }
36
xdr_encode_u64(__be32 * bp,u64 n)37 static __be32 *xdr_encode_u64(__be32 *bp, u64 n)
38 {
39 struct yfs_xdr_u64 *x = (void *)bp;
40
41 *x = u64_to_xdr(n);
42 return bp + xdr_size(x);
43 }
44
xdr_encode_YFSFid(__be32 * bp,struct afs_fid * fid)45 static __be32 *xdr_encode_YFSFid(__be32 *bp, struct afs_fid *fid)
46 {
47 struct yfs_xdr_YFSFid *x = (void *)bp;
48
49 x->volume = u64_to_xdr(fid->vid);
50 x->vnode.lo = u64_to_xdr(fid->vnode);
51 x->vnode.hi = htonl(fid->vnode_hi);
52 x->vnode.unique = htonl(fid->unique);
53 return bp + xdr_size(x);
54 }
55
xdr_strlen(unsigned int len)56 static size_t xdr_strlen(unsigned int len)
57 {
58 return sizeof(__be32) + round_up(len, sizeof(__be32));
59 }
60
xdr_encode_string(__be32 * bp,const char * p,unsigned int len)61 static __be32 *xdr_encode_string(__be32 *bp, const char *p, unsigned int len)
62 {
63 bp = xdr_encode_u32(bp, len);
64 bp = memcpy(bp, p, len);
65 if (len & 3) {
66 unsigned int pad = 4 - (len & 3);
67
68 memset((u8 *)bp + len, 0, pad);
69 len += pad;
70 }
71
72 return bp + len / sizeof(__be32);
73 }
74
xdr_encode_name(__be32 * bp,const struct qstr * p)75 static __be32 *xdr_encode_name(__be32 *bp, const struct qstr *p)
76 {
77 return xdr_encode_string(bp, p->name, p->len);
78 }
79
linux_to_yfs_time(const struct timespec64 * t)80 static s64 linux_to_yfs_time(const struct timespec64 *t)
81 {
82 /* Convert to 100ns intervals. */
83 return (u64)t->tv_sec * 10000000 + t->tv_nsec/100;
84 }
85
xdr_encode_YFSStoreStatus(__be32 * bp,mode_t * mode,const struct timespec64 * t)86 static __be32 *xdr_encode_YFSStoreStatus(__be32 *bp, mode_t *mode,
87 const struct timespec64 *t)
88 {
89 struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
90 mode_t masked_mode = mode ? *mode & S_IALLUGO : 0;
91 s64 mtime = linux_to_yfs_time(t);
92 u32 mask = AFS_SET_MTIME;
93
94 mask |= mode ? AFS_SET_MODE : 0;
95
96 x->mask = htonl(mask);
97 x->mode = htonl(masked_mode);
98 x->mtime_client = u64_to_xdr(mtime);
99 x->owner = u64_to_xdr(0);
100 x->group = u64_to_xdr(0);
101 return bp + xdr_size(x);
102 }
103
104 /*
105 * Convert a signed 100ns-resolution 64-bit time into a timespec.
106 */
yfs_time_to_linux(s64 t)107 static struct timespec64 yfs_time_to_linux(s64 t)
108 {
109 struct timespec64 ts;
110 u64 abs_t;
111
112 /*
113 * Unfortunately can not use normal 64 bit division on 32 bit arch, but
114 * the alternative, do_div, does not work with negative numbers so have
115 * to special case them
116 */
117 if (t < 0) {
118 abs_t = -t;
119 ts.tv_nsec = (time64_t)(do_div(abs_t, 10000000) * 100);
120 ts.tv_nsec = -ts.tv_nsec;
121 ts.tv_sec = -abs_t;
122 } else {
123 abs_t = t;
124 ts.tv_nsec = (time64_t)do_div(abs_t, 10000000) * 100;
125 ts.tv_sec = abs_t;
126 }
127
128 return ts;
129 }
130
xdr_to_time(const struct yfs_xdr_u64 xdr)131 static struct timespec64 xdr_to_time(const struct yfs_xdr_u64 xdr)
132 {
133 s64 t = xdr_to_u64(xdr);
134
135 return yfs_time_to_linux(t);
136 }
137
yfs_check_req(struct afs_call * call,__be32 * bp)138 static void yfs_check_req(struct afs_call *call, __be32 *bp)
139 {
140 size_t len = (void *)bp - call->request;
141
142 if (len > call->request_size)
143 pr_err("kAFS: %s: Request buffer overflow (%zu>%u)\n",
144 call->type->name, len, call->request_size);
145 else if (len < call->request_size)
146 pr_warn("kAFS: %s: Request buffer underflow (%zu<%u)\n",
147 call->type->name, len, call->request_size);
148 }
149
150 /*
151 * Dump a bad file status record.
152 */
xdr_dump_bad(const __be32 * bp)153 static void xdr_dump_bad(const __be32 *bp)
154 {
155 __be32 x[4];
156 int i;
157
158 pr_notice("YFS XDR: Bad status record\n");
159 for (i = 0; i < 6 * 4 * 4; i += 16) {
160 memcpy(x, bp, 16);
161 bp += 4;
162 pr_notice("%03x: %08x %08x %08x %08x\n",
163 i, ntohl(x[0]), ntohl(x[1]), ntohl(x[2]), ntohl(x[3]));
164 }
165
166 memcpy(x, bp, 8);
167 pr_notice("0x60: %08x %08x\n", ntohl(x[0]), ntohl(x[1]));
168 }
169
170 /*
171 * Decode a YFSFetchStatus block
172 */
xdr_decode_YFSFetchStatus(const __be32 ** _bp,struct afs_call * call,struct afs_status_cb * scb)173 static void xdr_decode_YFSFetchStatus(const __be32 **_bp,
174 struct afs_call *call,
175 struct afs_status_cb *scb)
176 {
177 const struct yfs_xdr_YFSFetchStatus *xdr = (const void *)*_bp;
178 struct afs_file_status *status = &scb->status;
179 u32 type;
180
181 status->abort_code = ntohl(xdr->abort_code);
182 if (status->abort_code != 0) {
183 if (status->abort_code == VNOVNODE)
184 status->nlink = 0;
185 scb->have_error = true;
186 goto advance;
187 }
188
189 type = ntohl(xdr->type);
190 switch (type) {
191 case AFS_FTYPE_FILE:
192 case AFS_FTYPE_DIR:
193 case AFS_FTYPE_SYMLINK:
194 status->type = type;
195 break;
196 default:
197 goto bad;
198 }
199
200 status->nlink = ntohl(xdr->nlink);
201 status->author = xdr_to_u64(xdr->author);
202 status->owner = xdr_to_u64(xdr->owner);
203 status->caller_access = ntohl(xdr->caller_access); /* Ticket dependent */
204 status->anon_access = ntohl(xdr->anon_access);
205 status->mode = ntohl(xdr->mode) & S_IALLUGO;
206 status->group = xdr_to_u64(xdr->group);
207 status->lock_count = ntohl(xdr->lock_count);
208
209 status->mtime_client = xdr_to_time(xdr->mtime_client);
210 status->mtime_server = xdr_to_time(xdr->mtime_server);
211 status->size = xdr_to_u64(xdr->size);
212 status->data_version = xdr_to_u64(xdr->data_version);
213 scb->have_status = true;
214 advance:
215 *_bp += xdr_size(xdr);
216 return;
217
218 bad:
219 xdr_dump_bad(*_bp);
220 afs_protocol_error(call, afs_eproto_bad_status);
221 goto advance;
222 }
223
224 /*
225 * Decode a YFSCallBack block
226 */
xdr_decode_YFSCallBack(const __be32 ** _bp,struct afs_call * call,struct afs_status_cb * scb)227 static void xdr_decode_YFSCallBack(const __be32 **_bp,
228 struct afs_call *call,
229 struct afs_status_cb *scb)
230 {
231 struct yfs_xdr_YFSCallBack *x = (void *)*_bp;
232 struct afs_callback *cb = &scb->callback;
233 ktime_t cb_expiry;
234
235 cb_expiry = ktime_add(call->issue_time, xdr_to_u64(x->expiration_time) * 100);
236 cb->expires_at = ktime_divns(cb_expiry, NSEC_PER_SEC);
237 scb->have_cb = true;
238 *_bp += xdr_size(x);
239 }
240
241 /*
242 * Decode a YFSVolSync block
243 */
xdr_decode_YFSVolSync(const __be32 ** _bp,struct afs_volsync * volsync)244 static void xdr_decode_YFSVolSync(const __be32 **_bp,
245 struct afs_volsync *volsync)
246 {
247 struct yfs_xdr_YFSVolSync *x = (void *)*_bp;
248 u64 creation;
249
250 if (volsync) {
251 creation = xdr_to_u64(x->vol_creation_date);
252 do_div(creation, 10 * 1000 * 1000);
253 volsync->creation = creation;
254 }
255
256 *_bp += xdr_size(x);
257 }
258
259 /*
260 * Encode the requested attributes into a YFSStoreStatus block
261 */
xdr_encode_YFS_StoreStatus(__be32 * bp,struct iattr * attr)262 static __be32 *xdr_encode_YFS_StoreStatus(__be32 *bp, struct iattr *attr)
263 {
264 struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
265 s64 mtime = 0, owner = 0, group = 0;
266 u32 mask = 0, mode = 0;
267
268 mask = 0;
269 if (attr->ia_valid & ATTR_MTIME) {
270 mask |= AFS_SET_MTIME;
271 mtime = linux_to_yfs_time(&attr->ia_mtime);
272 }
273
274 if (attr->ia_valid & ATTR_UID) {
275 mask |= AFS_SET_OWNER;
276 owner = from_kuid(&init_user_ns, attr->ia_uid);
277 }
278
279 if (attr->ia_valid & ATTR_GID) {
280 mask |= AFS_SET_GROUP;
281 group = from_kgid(&init_user_ns, attr->ia_gid);
282 }
283
284 if (attr->ia_valid & ATTR_MODE) {
285 mask |= AFS_SET_MODE;
286 mode = attr->ia_mode & S_IALLUGO;
287 }
288
289 x->mask = htonl(mask);
290 x->mode = htonl(mode);
291 x->mtime_client = u64_to_xdr(mtime);
292 x->owner = u64_to_xdr(owner);
293 x->group = u64_to_xdr(group);
294 return bp + xdr_size(x);
295 }
296
297 /*
298 * Decode a YFSFetchVolumeStatus block.
299 */
xdr_decode_YFSFetchVolumeStatus(const __be32 ** _bp,struct afs_volume_status * vs)300 static void xdr_decode_YFSFetchVolumeStatus(const __be32 **_bp,
301 struct afs_volume_status *vs)
302 {
303 const struct yfs_xdr_YFSFetchVolumeStatus *x = (const void *)*_bp;
304 u32 flags;
305
306 vs->vid = xdr_to_u64(x->vid);
307 vs->parent_id = xdr_to_u64(x->parent_id);
308 flags = ntohl(x->flags);
309 vs->online = flags & yfs_FVSOnline;
310 vs->in_service = flags & yfs_FVSInservice;
311 vs->blessed = flags & yfs_FVSBlessed;
312 vs->needs_salvage = flags & yfs_FVSNeedsSalvage;
313 vs->type = ntohl(x->type);
314 vs->min_quota = 0;
315 vs->max_quota = xdr_to_u64(x->max_quota);
316 vs->blocks_in_use = xdr_to_u64(x->blocks_in_use);
317 vs->part_blocks_avail = xdr_to_u64(x->part_blocks_avail);
318 vs->part_max_blocks = xdr_to_u64(x->part_max_blocks);
319 vs->vol_copy_date = xdr_to_u64(x->vol_copy_date);
320 vs->vol_backup_date = xdr_to_u64(x->vol_backup_date);
321 *_bp += sizeof(*x) / sizeof(__be32);
322 }
323
324 /*
325 * Deliver reply data to operations that just return a file status and a volume
326 * sync record.
327 */
yfs_deliver_status_and_volsync(struct afs_call * call)328 static int yfs_deliver_status_and_volsync(struct afs_call *call)
329 {
330 struct afs_operation *op = call->op;
331 const __be32 *bp;
332 int ret;
333
334 ret = afs_transfer_reply(call);
335 if (ret < 0)
336 return ret;
337
338 bp = call->buffer;
339 xdr_decode_YFSFetchStatus(&bp, call, &op->file[0].scb);
340 xdr_decode_YFSVolSync(&bp, &op->volsync);
341
342 _leave(" = 0 [done]");
343 return 0;
344 }
345
346 /*
347 * Deliver reply data to an YFS.FetchData64.
348 */
yfs_deliver_fs_fetch_data64(struct afs_call * call)349 static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
350 {
351 struct afs_operation *op = call->op;
352 struct afs_vnode_param *vp = &op->file[0];
353 struct afs_read *req = op->fetch.req;
354 const __be32 *bp;
355 int ret;
356
357 _enter("{%u,%zu, %zu/%llu}",
358 call->unmarshall, call->iov_len, iov_iter_count(call->iter),
359 req->actual_len);
360
361 switch (call->unmarshall) {
362 case 0:
363 req->actual_len = 0;
364 afs_extract_to_tmp64(call);
365 call->unmarshall++;
366 fallthrough;
367
368 /* Extract the returned data length into ->actual_len. This
369 * may indicate more or less data than was requested will be
370 * returned.
371 */
372 case 1:
373 _debug("extract data length");
374 ret = afs_extract_data(call, true);
375 if (ret < 0)
376 return ret;
377
378 req->actual_len = be64_to_cpu(call->tmp64);
379 _debug("DATA length: %llu", req->actual_len);
380
381 if (req->actual_len == 0)
382 goto no_more_data;
383
384 call->iter = req->iter;
385 call->iov_len = min(req->actual_len, req->len);
386 call->unmarshall++;
387 fallthrough;
388
389 /* extract the returned data */
390 case 2:
391 _debug("extract data %zu/%llu",
392 iov_iter_count(call->iter), req->actual_len);
393
394 ret = afs_extract_data(call, true);
395 if (ret < 0)
396 return ret;
397
398 call->iter = &call->def_iter;
399 if (req->actual_len <= req->len)
400 goto no_more_data;
401
402 /* Discard any excess data the server gave us */
403 afs_extract_discard(call, req->actual_len - req->len);
404 call->unmarshall = 3;
405 fallthrough;
406
407 case 3:
408 _debug("extract discard %zu/%llu",
409 iov_iter_count(call->iter), req->actual_len - req->len);
410
411 ret = afs_extract_data(call, true);
412 if (ret < 0)
413 return ret;
414
415 no_more_data:
416 call->unmarshall = 4;
417 afs_extract_to_buf(call,
418 sizeof(struct yfs_xdr_YFSFetchStatus) +
419 sizeof(struct yfs_xdr_YFSCallBack) +
420 sizeof(struct yfs_xdr_YFSVolSync));
421 fallthrough;
422
423 /* extract the metadata */
424 case 4:
425 ret = afs_extract_data(call, false);
426 if (ret < 0)
427 return ret;
428
429 bp = call->buffer;
430 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
431 xdr_decode_YFSCallBack(&bp, call, &vp->scb);
432 xdr_decode_YFSVolSync(&bp, &op->volsync);
433
434 req->data_version = vp->scb.status.data_version;
435 req->file_size = vp->scb.status.size;
436
437 call->unmarshall++;
438 fallthrough;
439
440 case 5:
441 break;
442 }
443
444 _leave(" = 0 [done]");
445 return 0;
446 }
447
448 /*
449 * YFS.FetchData64 operation type
450 */
451 static const struct afs_call_type yfs_RXYFSFetchData64 = {
452 .name = "YFS.FetchData64",
453 .op = yfs_FS_FetchData64,
454 .deliver = yfs_deliver_fs_fetch_data64,
455 .destructor = afs_flat_call_destructor,
456 };
457
458 /*
459 * Fetch data from a file.
460 */
yfs_fs_fetch_data(struct afs_operation * op)461 void yfs_fs_fetch_data(struct afs_operation *op)
462 {
463 struct afs_vnode_param *vp = &op->file[0];
464 struct afs_read *req = op->fetch.req;
465 struct afs_call *call;
466 __be32 *bp;
467
468 _enter(",%x,{%llx:%llu},%llx,%llx",
469 key_serial(op->key), vp->fid.vid, vp->fid.vnode,
470 req->pos, req->len);
471
472 call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchData64,
473 sizeof(__be32) * 2 +
474 sizeof(struct yfs_xdr_YFSFid) +
475 sizeof(struct yfs_xdr_u64) * 2,
476 sizeof(struct yfs_xdr_YFSFetchStatus) +
477 sizeof(struct yfs_xdr_YFSCallBack) +
478 sizeof(struct yfs_xdr_YFSVolSync));
479 if (!call)
480 return afs_op_nomem(op);
481
482 req->call_debug_id = call->debug_id;
483
484 /* marshall the parameters */
485 bp = call->request;
486 bp = xdr_encode_u32(bp, YFSFETCHDATA64);
487 bp = xdr_encode_u32(bp, 0); /* RPC flags */
488 bp = xdr_encode_YFSFid(bp, &vp->fid);
489 bp = xdr_encode_u64(bp, req->pos);
490 bp = xdr_encode_u64(bp, req->len);
491 yfs_check_req(call, bp);
492
493 trace_afs_make_fs_call(call, &vp->fid);
494 afs_make_op_call(op, call, GFP_NOFS);
495 }
496
497 /*
498 * Deliver reply data for YFS.CreateFile or YFS.MakeDir.
499 */
yfs_deliver_fs_create_vnode(struct afs_call * call)500 static int yfs_deliver_fs_create_vnode(struct afs_call *call)
501 {
502 struct afs_operation *op = call->op;
503 struct afs_vnode_param *dvp = &op->file[0];
504 struct afs_vnode_param *vp = &op->file[1];
505 const __be32 *bp;
506 int ret;
507
508 _enter("{%u}", call->unmarshall);
509
510 ret = afs_transfer_reply(call);
511 if (ret < 0)
512 return ret;
513
514 /* unmarshall the reply once we've received all of it */
515 bp = call->buffer;
516 xdr_decode_YFSFid(&bp, &op->file[1].fid);
517 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
518 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
519 xdr_decode_YFSCallBack(&bp, call, &vp->scb);
520 xdr_decode_YFSVolSync(&bp, &op->volsync);
521
522 _leave(" = 0 [done]");
523 return 0;
524 }
525
526 /*
527 * FS.CreateFile and FS.MakeDir operation type
528 */
529 static const struct afs_call_type afs_RXFSCreateFile = {
530 .name = "YFS.CreateFile",
531 .op = yfs_FS_CreateFile,
532 .deliver = yfs_deliver_fs_create_vnode,
533 .destructor = afs_flat_call_destructor,
534 };
535
536 /*
537 * Create a file.
538 */
yfs_fs_create_file(struct afs_operation * op)539 void yfs_fs_create_file(struct afs_operation *op)
540 {
541 const struct qstr *name = &op->dentry->d_name;
542 struct afs_vnode_param *dvp = &op->file[0];
543 struct afs_call *call;
544 size_t reqsz, rplsz;
545 __be32 *bp;
546
547 _enter("");
548
549 reqsz = (sizeof(__be32) +
550 sizeof(__be32) +
551 sizeof(struct yfs_xdr_YFSFid) +
552 xdr_strlen(name->len) +
553 sizeof(struct yfs_xdr_YFSStoreStatus) +
554 sizeof(__be32));
555 rplsz = (sizeof(struct yfs_xdr_YFSFid) +
556 sizeof(struct yfs_xdr_YFSFetchStatus) +
557 sizeof(struct yfs_xdr_YFSFetchStatus) +
558 sizeof(struct yfs_xdr_YFSCallBack) +
559 sizeof(struct yfs_xdr_YFSVolSync));
560
561 call = afs_alloc_flat_call(op->net, &afs_RXFSCreateFile, reqsz, rplsz);
562 if (!call)
563 return afs_op_nomem(op);
564
565 /* marshall the parameters */
566 bp = call->request;
567 bp = xdr_encode_u32(bp, YFSCREATEFILE);
568 bp = xdr_encode_u32(bp, 0); /* RPC flags */
569 bp = xdr_encode_YFSFid(bp, &dvp->fid);
570 bp = xdr_encode_name(bp, name);
571 bp = xdr_encode_YFSStoreStatus(bp, &op->create.mode, &op->mtime);
572 bp = xdr_encode_u32(bp, yfs_LockNone); /* ViceLockType */
573 yfs_check_req(call, bp);
574
575 trace_afs_make_fs_call1(call, &dvp->fid, name);
576 afs_make_op_call(op, call, GFP_NOFS);
577 }
578
579 static const struct afs_call_type yfs_RXFSMakeDir = {
580 .name = "YFS.MakeDir",
581 .op = yfs_FS_MakeDir,
582 .deliver = yfs_deliver_fs_create_vnode,
583 .destructor = afs_flat_call_destructor,
584 };
585
586 /*
587 * Make a directory.
588 */
yfs_fs_make_dir(struct afs_operation * op)589 void yfs_fs_make_dir(struct afs_operation *op)
590 {
591 const struct qstr *name = &op->dentry->d_name;
592 struct afs_vnode_param *dvp = &op->file[0];
593 struct afs_call *call;
594 size_t reqsz, rplsz;
595 __be32 *bp;
596
597 _enter("");
598
599 reqsz = (sizeof(__be32) +
600 sizeof(struct yfs_xdr_RPCFlags) +
601 sizeof(struct yfs_xdr_YFSFid) +
602 xdr_strlen(name->len) +
603 sizeof(struct yfs_xdr_YFSStoreStatus));
604 rplsz = (sizeof(struct yfs_xdr_YFSFid) +
605 sizeof(struct yfs_xdr_YFSFetchStatus) +
606 sizeof(struct yfs_xdr_YFSFetchStatus) +
607 sizeof(struct yfs_xdr_YFSCallBack) +
608 sizeof(struct yfs_xdr_YFSVolSync));
609
610 call = afs_alloc_flat_call(op->net, &yfs_RXFSMakeDir, reqsz, rplsz);
611 if (!call)
612 return afs_op_nomem(op);
613
614 /* marshall the parameters */
615 bp = call->request;
616 bp = xdr_encode_u32(bp, YFSMAKEDIR);
617 bp = xdr_encode_u32(bp, 0); /* RPC flags */
618 bp = xdr_encode_YFSFid(bp, &dvp->fid);
619 bp = xdr_encode_name(bp, name);
620 bp = xdr_encode_YFSStoreStatus(bp, &op->create.mode, &op->mtime);
621 yfs_check_req(call, bp);
622
623 trace_afs_make_fs_call1(call, &dvp->fid, name);
624 afs_make_op_call(op, call, GFP_NOFS);
625 }
626
627 /*
628 * Deliver reply data to a YFS.RemoveFile2 operation.
629 */
yfs_deliver_fs_remove_file2(struct afs_call * call)630 static int yfs_deliver_fs_remove_file2(struct afs_call *call)
631 {
632 struct afs_operation *op = call->op;
633 struct afs_vnode_param *dvp = &op->file[0];
634 struct afs_vnode_param *vp = &op->file[1];
635 struct afs_fid fid;
636 const __be32 *bp;
637 int ret;
638
639 _enter("{%u}", call->unmarshall);
640
641 ret = afs_transfer_reply(call);
642 if (ret < 0)
643 return ret;
644
645 bp = call->buffer;
646 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
647 xdr_decode_YFSFid(&bp, &fid);
648 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
649 /* Was deleted if vnode->status.abort_code == VNOVNODE. */
650
651 xdr_decode_YFSVolSync(&bp, &op->volsync);
652 return 0;
653 }
654
yfs_done_fs_remove_file2(struct afs_call * call)655 static void yfs_done_fs_remove_file2(struct afs_call *call)
656 {
657 if (call->error == -ECONNABORTED &&
658 call->abort_code == RX_INVALID_OPERATION) {
659 set_bit(AFS_SERVER_FL_NO_RM2, &call->server->flags);
660 call->op->flags |= AFS_OPERATION_DOWNGRADE;
661 }
662 }
663
664 /*
665 * YFS.RemoveFile2 operation type.
666 */
667 static const struct afs_call_type yfs_RXYFSRemoveFile2 = {
668 .name = "YFS.RemoveFile2",
669 .op = yfs_FS_RemoveFile2,
670 .deliver = yfs_deliver_fs_remove_file2,
671 .done = yfs_done_fs_remove_file2,
672 .destructor = afs_flat_call_destructor,
673 };
674
675 /*
676 * Remove a file and retrieve new file status.
677 */
yfs_fs_remove_file2(struct afs_operation * op)678 void yfs_fs_remove_file2(struct afs_operation *op)
679 {
680 struct afs_vnode_param *dvp = &op->file[0];
681 const struct qstr *name = &op->dentry->d_name;
682 struct afs_call *call;
683 __be32 *bp;
684
685 _enter("");
686
687 call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveFile2,
688 sizeof(__be32) +
689 sizeof(struct yfs_xdr_RPCFlags) +
690 sizeof(struct yfs_xdr_YFSFid) +
691 xdr_strlen(name->len),
692 sizeof(struct yfs_xdr_YFSFetchStatus) +
693 sizeof(struct yfs_xdr_YFSFid) +
694 sizeof(struct yfs_xdr_YFSFetchStatus) +
695 sizeof(struct yfs_xdr_YFSVolSync));
696 if (!call)
697 return afs_op_nomem(op);
698
699 /* marshall the parameters */
700 bp = call->request;
701 bp = xdr_encode_u32(bp, YFSREMOVEFILE2);
702 bp = xdr_encode_u32(bp, 0); /* RPC flags */
703 bp = xdr_encode_YFSFid(bp, &dvp->fid);
704 bp = xdr_encode_name(bp, name);
705 yfs_check_req(call, bp);
706
707 trace_afs_make_fs_call1(call, &dvp->fid, name);
708 afs_make_op_call(op, call, GFP_NOFS);
709 }
710
711 /*
712 * Deliver reply data to a YFS.RemoveFile or YFS.RemoveDir operation.
713 */
yfs_deliver_fs_remove(struct afs_call * call)714 static int yfs_deliver_fs_remove(struct afs_call *call)
715 {
716 struct afs_operation *op = call->op;
717 struct afs_vnode_param *dvp = &op->file[0];
718 const __be32 *bp;
719 int ret;
720
721 _enter("{%u}", call->unmarshall);
722
723 ret = afs_transfer_reply(call);
724 if (ret < 0)
725 return ret;
726
727 bp = call->buffer;
728 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
729 xdr_decode_YFSVolSync(&bp, &op->volsync);
730 return 0;
731 }
732
733 /*
734 * FS.RemoveDir and FS.RemoveFile operation types.
735 */
736 static const struct afs_call_type yfs_RXYFSRemoveFile = {
737 .name = "YFS.RemoveFile",
738 .op = yfs_FS_RemoveFile,
739 .deliver = yfs_deliver_fs_remove,
740 .destructor = afs_flat_call_destructor,
741 };
742
743 /*
744 * Remove a file.
745 */
yfs_fs_remove_file(struct afs_operation * op)746 void yfs_fs_remove_file(struct afs_operation *op)
747 {
748 const struct qstr *name = &op->dentry->d_name;
749 struct afs_vnode_param *dvp = &op->file[0];
750 struct afs_call *call;
751 __be32 *bp;
752
753 _enter("");
754
755 if (!test_bit(AFS_SERVER_FL_NO_RM2, &op->server->flags))
756 return yfs_fs_remove_file2(op);
757
758 call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveFile,
759 sizeof(__be32) +
760 sizeof(struct yfs_xdr_RPCFlags) +
761 sizeof(struct yfs_xdr_YFSFid) +
762 xdr_strlen(name->len),
763 sizeof(struct yfs_xdr_YFSFetchStatus) +
764 sizeof(struct yfs_xdr_YFSVolSync));
765 if (!call)
766 return afs_op_nomem(op);
767
768 /* marshall the parameters */
769 bp = call->request;
770 bp = xdr_encode_u32(bp, YFSREMOVEFILE);
771 bp = xdr_encode_u32(bp, 0); /* RPC flags */
772 bp = xdr_encode_YFSFid(bp, &dvp->fid);
773 bp = xdr_encode_name(bp, name);
774 yfs_check_req(call, bp);
775
776 trace_afs_make_fs_call1(call, &dvp->fid, name);
777 afs_make_op_call(op, call, GFP_NOFS);
778 }
779
780 static const struct afs_call_type yfs_RXYFSRemoveDir = {
781 .name = "YFS.RemoveDir",
782 .op = yfs_FS_RemoveDir,
783 .deliver = yfs_deliver_fs_remove,
784 .destructor = afs_flat_call_destructor,
785 };
786
787 /*
788 * Remove a directory.
789 */
yfs_fs_remove_dir(struct afs_operation * op)790 void yfs_fs_remove_dir(struct afs_operation *op)
791 {
792 const struct qstr *name = &op->dentry->d_name;
793 struct afs_vnode_param *dvp = &op->file[0];
794 struct afs_call *call;
795 __be32 *bp;
796
797 _enter("");
798
799 call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveDir,
800 sizeof(__be32) +
801 sizeof(struct yfs_xdr_RPCFlags) +
802 sizeof(struct yfs_xdr_YFSFid) +
803 xdr_strlen(name->len),
804 sizeof(struct yfs_xdr_YFSFetchStatus) +
805 sizeof(struct yfs_xdr_YFSVolSync));
806 if (!call)
807 return afs_op_nomem(op);
808
809 /* marshall the parameters */
810 bp = call->request;
811 bp = xdr_encode_u32(bp, YFSREMOVEDIR);
812 bp = xdr_encode_u32(bp, 0); /* RPC flags */
813 bp = xdr_encode_YFSFid(bp, &dvp->fid);
814 bp = xdr_encode_name(bp, name);
815 yfs_check_req(call, bp);
816
817 trace_afs_make_fs_call1(call, &dvp->fid, name);
818 afs_make_op_call(op, call, GFP_NOFS);
819 }
820
821 /*
822 * Deliver reply data to a YFS.Link operation.
823 */
yfs_deliver_fs_link(struct afs_call * call)824 static int yfs_deliver_fs_link(struct afs_call *call)
825 {
826 struct afs_operation *op = call->op;
827 struct afs_vnode_param *dvp = &op->file[0];
828 struct afs_vnode_param *vp = &op->file[1];
829 const __be32 *bp;
830 int ret;
831
832 _enter("{%u}", call->unmarshall);
833
834 ret = afs_transfer_reply(call);
835 if (ret < 0)
836 return ret;
837
838 bp = call->buffer;
839 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
840 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
841 xdr_decode_YFSVolSync(&bp, &op->volsync);
842 _leave(" = 0 [done]");
843 return 0;
844 }
845
846 /*
847 * YFS.Link operation type.
848 */
849 static const struct afs_call_type yfs_RXYFSLink = {
850 .name = "YFS.Link",
851 .op = yfs_FS_Link,
852 .deliver = yfs_deliver_fs_link,
853 .destructor = afs_flat_call_destructor,
854 };
855
856 /*
857 * Make a hard link.
858 */
yfs_fs_link(struct afs_operation * op)859 void yfs_fs_link(struct afs_operation *op)
860 {
861 const struct qstr *name = &op->dentry->d_name;
862 struct afs_vnode_param *dvp = &op->file[0];
863 struct afs_vnode_param *vp = &op->file[1];
864 struct afs_call *call;
865 __be32 *bp;
866
867 _enter("");
868
869 call = afs_alloc_flat_call(op->net, &yfs_RXYFSLink,
870 sizeof(__be32) +
871 sizeof(struct yfs_xdr_RPCFlags) +
872 sizeof(struct yfs_xdr_YFSFid) +
873 xdr_strlen(name->len) +
874 sizeof(struct yfs_xdr_YFSFid),
875 sizeof(struct yfs_xdr_YFSFetchStatus) +
876 sizeof(struct yfs_xdr_YFSFetchStatus) +
877 sizeof(struct yfs_xdr_YFSVolSync));
878 if (!call)
879 return afs_op_nomem(op);
880
881 /* marshall the parameters */
882 bp = call->request;
883 bp = xdr_encode_u32(bp, YFSLINK);
884 bp = xdr_encode_u32(bp, 0); /* RPC flags */
885 bp = xdr_encode_YFSFid(bp, &dvp->fid);
886 bp = xdr_encode_name(bp, name);
887 bp = xdr_encode_YFSFid(bp, &vp->fid);
888 yfs_check_req(call, bp);
889
890 trace_afs_make_fs_call1(call, &vp->fid, name);
891 afs_make_op_call(op, call, GFP_NOFS);
892 }
893
894 /*
895 * Deliver reply data to a YFS.Symlink operation.
896 */
yfs_deliver_fs_symlink(struct afs_call * call)897 static int yfs_deliver_fs_symlink(struct afs_call *call)
898 {
899 struct afs_operation *op = call->op;
900 struct afs_vnode_param *dvp = &op->file[0];
901 struct afs_vnode_param *vp = &op->file[1];
902 const __be32 *bp;
903 int ret;
904
905 _enter("{%u}", call->unmarshall);
906
907 ret = afs_transfer_reply(call);
908 if (ret < 0)
909 return ret;
910
911 /* unmarshall the reply once we've received all of it */
912 bp = call->buffer;
913 xdr_decode_YFSFid(&bp, &vp->fid);
914 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
915 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
916 xdr_decode_YFSVolSync(&bp, &op->volsync);
917
918 _leave(" = 0 [done]");
919 return 0;
920 }
921
922 /*
923 * YFS.Symlink operation type
924 */
925 static const struct afs_call_type yfs_RXYFSSymlink = {
926 .name = "YFS.Symlink",
927 .op = yfs_FS_Symlink,
928 .deliver = yfs_deliver_fs_symlink,
929 .destructor = afs_flat_call_destructor,
930 };
931
932 /*
933 * Create a symbolic link.
934 */
yfs_fs_symlink(struct afs_operation * op)935 void yfs_fs_symlink(struct afs_operation *op)
936 {
937 const struct qstr *name = &op->dentry->d_name;
938 struct afs_vnode_param *dvp = &op->file[0];
939 struct afs_call *call;
940 size_t contents_sz;
941 mode_t mode = 0777;
942 __be32 *bp;
943
944 _enter("");
945
946 contents_sz = strlen(op->create.symlink);
947 call = afs_alloc_flat_call(op->net, &yfs_RXYFSSymlink,
948 sizeof(__be32) +
949 sizeof(struct yfs_xdr_RPCFlags) +
950 sizeof(struct yfs_xdr_YFSFid) +
951 xdr_strlen(name->len) +
952 xdr_strlen(contents_sz) +
953 sizeof(struct yfs_xdr_YFSStoreStatus),
954 sizeof(struct yfs_xdr_YFSFid) +
955 sizeof(struct yfs_xdr_YFSFetchStatus) +
956 sizeof(struct yfs_xdr_YFSFetchStatus) +
957 sizeof(struct yfs_xdr_YFSVolSync));
958 if (!call)
959 return afs_op_nomem(op);
960
961 /* marshall the parameters */
962 bp = call->request;
963 bp = xdr_encode_u32(bp, YFSSYMLINK);
964 bp = xdr_encode_u32(bp, 0); /* RPC flags */
965 bp = xdr_encode_YFSFid(bp, &dvp->fid);
966 bp = xdr_encode_name(bp, name);
967 bp = xdr_encode_string(bp, op->create.symlink, contents_sz);
968 bp = xdr_encode_YFSStoreStatus(bp, &mode, &op->mtime);
969 yfs_check_req(call, bp);
970
971 trace_afs_make_fs_call1(call, &dvp->fid, name);
972 afs_make_op_call(op, call, GFP_NOFS);
973 }
974
975 /*
976 * Deliver reply data to a YFS.Rename operation.
977 */
yfs_deliver_fs_rename(struct afs_call * call)978 static int yfs_deliver_fs_rename(struct afs_call *call)
979 {
980 struct afs_operation *op = call->op;
981 struct afs_vnode_param *orig_dvp = &op->file[0];
982 struct afs_vnode_param *new_dvp = &op->file[1];
983 const __be32 *bp;
984 int ret;
985
986 _enter("{%u}", call->unmarshall);
987
988 ret = afs_transfer_reply(call);
989 if (ret < 0)
990 return ret;
991
992 bp = call->buffer;
993 /* If the two dirs are the same, we have two copies of the same status
994 * report, so we just decode it twice.
995 */
996 xdr_decode_YFSFetchStatus(&bp, call, &orig_dvp->scb);
997 xdr_decode_YFSFetchStatus(&bp, call, &new_dvp->scb);
998 xdr_decode_YFSVolSync(&bp, &op->volsync);
999 _leave(" = 0 [done]");
1000 return 0;
1001 }
1002
1003 /*
1004 * YFS.Rename operation type
1005 */
1006 static const struct afs_call_type yfs_RXYFSRename = {
1007 .name = "FS.Rename",
1008 .op = yfs_FS_Rename,
1009 .deliver = yfs_deliver_fs_rename,
1010 .destructor = afs_flat_call_destructor,
1011 };
1012
1013 /*
1014 * Rename a file or directory.
1015 */
yfs_fs_rename(struct afs_operation * op)1016 void yfs_fs_rename(struct afs_operation *op)
1017 {
1018 struct afs_vnode_param *orig_dvp = &op->file[0];
1019 struct afs_vnode_param *new_dvp = &op->file[1];
1020 const struct qstr *orig_name = &op->dentry->d_name;
1021 const struct qstr *new_name = &op->dentry_2->d_name;
1022 struct afs_call *call;
1023 __be32 *bp;
1024
1025 _enter("");
1026
1027 call = afs_alloc_flat_call(op->net, &yfs_RXYFSRename,
1028 sizeof(__be32) +
1029 sizeof(struct yfs_xdr_RPCFlags) +
1030 sizeof(struct yfs_xdr_YFSFid) +
1031 xdr_strlen(orig_name->len) +
1032 sizeof(struct yfs_xdr_YFSFid) +
1033 xdr_strlen(new_name->len),
1034 sizeof(struct yfs_xdr_YFSFetchStatus) +
1035 sizeof(struct yfs_xdr_YFSFetchStatus) +
1036 sizeof(struct yfs_xdr_YFSVolSync));
1037 if (!call)
1038 return afs_op_nomem(op);
1039
1040 /* marshall the parameters */
1041 bp = call->request;
1042 bp = xdr_encode_u32(bp, YFSRENAME);
1043 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1044 bp = xdr_encode_YFSFid(bp, &orig_dvp->fid);
1045 bp = xdr_encode_name(bp, orig_name);
1046 bp = xdr_encode_YFSFid(bp, &new_dvp->fid);
1047 bp = xdr_encode_name(bp, new_name);
1048 yfs_check_req(call, bp);
1049
1050 trace_afs_make_fs_call2(call, &orig_dvp->fid, orig_name, new_name);
1051 afs_make_op_call(op, call, GFP_NOFS);
1052 }
1053
1054 /*
1055 * YFS.StoreData64 operation type.
1056 */
1057 static const struct afs_call_type yfs_RXYFSStoreData64 = {
1058 .name = "YFS.StoreData64",
1059 .op = yfs_FS_StoreData64,
1060 .deliver = yfs_deliver_status_and_volsync,
1061 .destructor = afs_flat_call_destructor,
1062 };
1063
1064 /*
1065 * Store a set of pages to a large file.
1066 */
yfs_fs_store_data(struct afs_operation * op)1067 void yfs_fs_store_data(struct afs_operation *op)
1068 {
1069 struct afs_vnode_param *vp = &op->file[0];
1070 struct afs_call *call;
1071 __be32 *bp;
1072
1073 _enter(",%x,{%llx:%llu},,",
1074 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1075
1076 _debug("size %llx, at %llx, i_size %llx",
1077 (unsigned long long)op->store.size,
1078 (unsigned long long)op->store.pos,
1079 (unsigned long long)op->store.i_size);
1080
1081 call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreData64,
1082 sizeof(__be32) +
1083 sizeof(__be32) +
1084 sizeof(struct yfs_xdr_YFSFid) +
1085 sizeof(struct yfs_xdr_YFSStoreStatus) +
1086 sizeof(struct yfs_xdr_u64) * 3,
1087 sizeof(struct yfs_xdr_YFSFetchStatus) +
1088 sizeof(struct yfs_xdr_YFSVolSync));
1089 if (!call)
1090 return afs_op_nomem(op);
1091
1092 call->write_iter = op->store.write_iter;
1093
1094 /* marshall the parameters */
1095 bp = call->request;
1096 bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1097 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1098 bp = xdr_encode_YFSFid(bp, &vp->fid);
1099 bp = xdr_encode_YFSStoreStatus(bp, NULL, &op->mtime);
1100 bp = xdr_encode_u64(bp, op->store.pos);
1101 bp = xdr_encode_u64(bp, op->store.size);
1102 bp = xdr_encode_u64(bp, op->store.i_size);
1103 yfs_check_req(call, bp);
1104
1105 trace_afs_make_fs_call(call, &vp->fid);
1106 afs_make_op_call(op, call, GFP_NOFS);
1107 }
1108
1109 /*
1110 * YFS.StoreStatus operation type
1111 */
1112 static const struct afs_call_type yfs_RXYFSStoreStatus = {
1113 .name = "YFS.StoreStatus",
1114 .op = yfs_FS_StoreStatus,
1115 .deliver = yfs_deliver_status_and_volsync,
1116 .destructor = afs_flat_call_destructor,
1117 };
1118
1119 static const struct afs_call_type yfs_RXYFSStoreData64_as_Status = {
1120 .name = "YFS.StoreData64",
1121 .op = yfs_FS_StoreData64,
1122 .deliver = yfs_deliver_status_and_volsync,
1123 .destructor = afs_flat_call_destructor,
1124 };
1125
1126 /*
1127 * Set the attributes on a file, using YFS.StoreData64 rather than
1128 * YFS.StoreStatus so as to alter the file size also.
1129 */
yfs_fs_setattr_size(struct afs_operation * op)1130 static void yfs_fs_setattr_size(struct afs_operation *op)
1131 {
1132 struct afs_vnode_param *vp = &op->file[0];
1133 struct afs_call *call;
1134 struct iattr *attr = op->setattr.attr;
1135 __be32 *bp;
1136
1137 _enter(",%x,{%llx:%llu},,",
1138 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1139
1140 call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreData64_as_Status,
1141 sizeof(__be32) * 2 +
1142 sizeof(struct yfs_xdr_YFSFid) +
1143 sizeof(struct yfs_xdr_YFSStoreStatus) +
1144 sizeof(struct yfs_xdr_u64) * 3,
1145 sizeof(struct yfs_xdr_YFSFetchStatus) +
1146 sizeof(struct yfs_xdr_YFSVolSync));
1147 if (!call)
1148 return afs_op_nomem(op);
1149
1150 /* marshall the parameters */
1151 bp = call->request;
1152 bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1153 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1154 bp = xdr_encode_YFSFid(bp, &vp->fid);
1155 bp = xdr_encode_YFS_StoreStatus(bp, attr);
1156 bp = xdr_encode_u64(bp, attr->ia_size); /* position of start of write */
1157 bp = xdr_encode_u64(bp, 0); /* size of write */
1158 bp = xdr_encode_u64(bp, attr->ia_size); /* new file length */
1159 yfs_check_req(call, bp);
1160
1161 trace_afs_make_fs_call(call, &vp->fid);
1162 afs_make_op_call(op, call, GFP_NOFS);
1163 }
1164
1165 /*
1166 * Set the attributes on a file, using YFS.StoreData64 if there's a change in
1167 * file size, and YFS.StoreStatus otherwise.
1168 */
yfs_fs_setattr(struct afs_operation * op)1169 void yfs_fs_setattr(struct afs_operation *op)
1170 {
1171 struct afs_vnode_param *vp = &op->file[0];
1172 struct afs_call *call;
1173 struct iattr *attr = op->setattr.attr;
1174 __be32 *bp;
1175
1176 if (attr->ia_valid & ATTR_SIZE)
1177 return yfs_fs_setattr_size(op);
1178
1179 _enter(",%x,{%llx:%llu},,",
1180 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1181
1182 call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreStatus,
1183 sizeof(__be32) * 2 +
1184 sizeof(struct yfs_xdr_YFSFid) +
1185 sizeof(struct yfs_xdr_YFSStoreStatus),
1186 sizeof(struct yfs_xdr_YFSFetchStatus) +
1187 sizeof(struct yfs_xdr_YFSVolSync));
1188 if (!call)
1189 return afs_op_nomem(op);
1190
1191 /* marshall the parameters */
1192 bp = call->request;
1193 bp = xdr_encode_u32(bp, YFSSTORESTATUS);
1194 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1195 bp = xdr_encode_YFSFid(bp, &vp->fid);
1196 bp = xdr_encode_YFS_StoreStatus(bp, attr);
1197 yfs_check_req(call, bp);
1198
1199 trace_afs_make_fs_call(call, &vp->fid);
1200 afs_make_op_call(op, call, GFP_NOFS);
1201 }
1202
1203 /*
1204 * Deliver reply data to a YFS.GetVolumeStatus operation.
1205 */
yfs_deliver_fs_get_volume_status(struct afs_call * call)1206 static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
1207 {
1208 struct afs_operation *op = call->op;
1209 const __be32 *bp;
1210 char *p;
1211 u32 size;
1212 int ret;
1213
1214 _enter("{%u}", call->unmarshall);
1215
1216 switch (call->unmarshall) {
1217 case 0:
1218 call->unmarshall++;
1219 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchVolumeStatus));
1220 fallthrough;
1221
1222 /* extract the returned status record */
1223 case 1:
1224 _debug("extract status");
1225 ret = afs_extract_data(call, true);
1226 if (ret < 0)
1227 return ret;
1228
1229 bp = call->buffer;
1230 xdr_decode_YFSFetchVolumeStatus(&bp, &op->volstatus.vs);
1231 call->unmarshall++;
1232 afs_extract_to_tmp(call);
1233 fallthrough;
1234
1235 /* extract the volume name length */
1236 case 2:
1237 ret = afs_extract_data(call, true);
1238 if (ret < 0)
1239 return ret;
1240
1241 call->count = ntohl(call->tmp);
1242 _debug("volname length: %u", call->count);
1243 if (call->count >= AFSNAMEMAX)
1244 return afs_protocol_error(call, afs_eproto_volname_len);
1245 size = (call->count + 3) & ~3; /* It's padded */
1246 afs_extract_to_buf(call, size);
1247 call->unmarshall++;
1248 fallthrough;
1249
1250 /* extract the volume name */
1251 case 3:
1252 _debug("extract volname");
1253 ret = afs_extract_data(call, true);
1254 if (ret < 0)
1255 return ret;
1256
1257 p = call->buffer;
1258 p[call->count] = 0;
1259 _debug("volname '%s'", p);
1260 afs_extract_to_tmp(call);
1261 call->unmarshall++;
1262 fallthrough;
1263
1264 /* extract the offline message length */
1265 case 4:
1266 ret = afs_extract_data(call, true);
1267 if (ret < 0)
1268 return ret;
1269
1270 call->count = ntohl(call->tmp);
1271 _debug("offline msg length: %u", call->count);
1272 if (call->count >= AFSNAMEMAX)
1273 return afs_protocol_error(call, afs_eproto_offline_msg_len);
1274 size = (call->count + 3) & ~3; /* It's padded */
1275 afs_extract_to_buf(call, size);
1276 call->unmarshall++;
1277 fallthrough;
1278
1279 /* extract the offline message */
1280 case 5:
1281 _debug("extract offline");
1282 ret = afs_extract_data(call, true);
1283 if (ret < 0)
1284 return ret;
1285
1286 p = call->buffer;
1287 p[call->count] = 0;
1288 _debug("offline '%s'", p);
1289
1290 afs_extract_to_tmp(call);
1291 call->unmarshall++;
1292 fallthrough;
1293
1294 /* extract the message of the day length */
1295 case 6:
1296 ret = afs_extract_data(call, true);
1297 if (ret < 0)
1298 return ret;
1299
1300 call->count = ntohl(call->tmp);
1301 _debug("motd length: %u", call->count);
1302 if (call->count >= AFSNAMEMAX)
1303 return afs_protocol_error(call, afs_eproto_motd_len);
1304 size = (call->count + 3) & ~3; /* It's padded */
1305 afs_extract_to_buf(call, size);
1306 call->unmarshall++;
1307 fallthrough;
1308
1309 /* extract the message of the day */
1310 case 7:
1311 _debug("extract motd");
1312 ret = afs_extract_data(call, false);
1313 if (ret < 0)
1314 return ret;
1315
1316 p = call->buffer;
1317 p[call->count] = 0;
1318 _debug("motd '%s'", p);
1319
1320 call->unmarshall++;
1321 fallthrough;
1322
1323 case 8:
1324 break;
1325 }
1326
1327 _leave(" = 0 [done]");
1328 return 0;
1329 }
1330
1331 /*
1332 * YFS.GetVolumeStatus operation type
1333 */
1334 static const struct afs_call_type yfs_RXYFSGetVolumeStatus = {
1335 .name = "YFS.GetVolumeStatus",
1336 .op = yfs_FS_GetVolumeStatus,
1337 .deliver = yfs_deliver_fs_get_volume_status,
1338 .destructor = afs_flat_call_destructor,
1339 };
1340
1341 /*
1342 * fetch the status of a volume
1343 */
yfs_fs_get_volume_status(struct afs_operation * op)1344 void yfs_fs_get_volume_status(struct afs_operation *op)
1345 {
1346 struct afs_vnode_param *vp = &op->file[0];
1347 struct afs_call *call;
1348 __be32 *bp;
1349
1350 _enter("");
1351
1352 call = afs_alloc_flat_call(op->net, &yfs_RXYFSGetVolumeStatus,
1353 sizeof(__be32) * 2 +
1354 sizeof(struct yfs_xdr_u64),
1355 max_t(size_t,
1356 sizeof(struct yfs_xdr_YFSFetchVolumeStatus) +
1357 sizeof(__be32),
1358 AFSOPAQUEMAX + 1));
1359 if (!call)
1360 return afs_op_nomem(op);
1361
1362 /* marshall the parameters */
1363 bp = call->request;
1364 bp = xdr_encode_u32(bp, YFSGETVOLUMESTATUS);
1365 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1366 bp = xdr_encode_u64(bp, vp->fid.vid);
1367 yfs_check_req(call, bp);
1368
1369 trace_afs_make_fs_call(call, &vp->fid);
1370 afs_make_op_call(op, call, GFP_NOFS);
1371 }
1372
1373 /*
1374 * YFS.SetLock operation type
1375 */
1376 static const struct afs_call_type yfs_RXYFSSetLock = {
1377 .name = "YFS.SetLock",
1378 .op = yfs_FS_SetLock,
1379 .deliver = yfs_deliver_status_and_volsync,
1380 .done = afs_lock_op_done,
1381 .destructor = afs_flat_call_destructor,
1382 };
1383
1384 /*
1385 * YFS.ExtendLock operation type
1386 */
1387 static const struct afs_call_type yfs_RXYFSExtendLock = {
1388 .name = "YFS.ExtendLock",
1389 .op = yfs_FS_ExtendLock,
1390 .deliver = yfs_deliver_status_and_volsync,
1391 .done = afs_lock_op_done,
1392 .destructor = afs_flat_call_destructor,
1393 };
1394
1395 /*
1396 * YFS.ReleaseLock operation type
1397 */
1398 static const struct afs_call_type yfs_RXYFSReleaseLock = {
1399 .name = "YFS.ReleaseLock",
1400 .op = yfs_FS_ReleaseLock,
1401 .deliver = yfs_deliver_status_and_volsync,
1402 .destructor = afs_flat_call_destructor,
1403 };
1404
1405 /*
1406 * Set a lock on a file
1407 */
yfs_fs_set_lock(struct afs_operation * op)1408 void yfs_fs_set_lock(struct afs_operation *op)
1409 {
1410 struct afs_vnode_param *vp = &op->file[0];
1411 struct afs_call *call;
1412 __be32 *bp;
1413
1414 _enter("");
1415
1416 call = afs_alloc_flat_call(op->net, &yfs_RXYFSSetLock,
1417 sizeof(__be32) * 2 +
1418 sizeof(struct yfs_xdr_YFSFid) +
1419 sizeof(__be32),
1420 sizeof(struct yfs_xdr_YFSFetchStatus) +
1421 sizeof(struct yfs_xdr_YFSVolSync));
1422 if (!call)
1423 return afs_op_nomem(op);
1424
1425 /* marshall the parameters */
1426 bp = call->request;
1427 bp = xdr_encode_u32(bp, YFSSETLOCK);
1428 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1429 bp = xdr_encode_YFSFid(bp, &vp->fid);
1430 bp = xdr_encode_u32(bp, op->lock.type);
1431 yfs_check_req(call, bp);
1432
1433 trace_afs_make_fs_calli(call, &vp->fid, op->lock.type);
1434 afs_make_op_call(op, call, GFP_NOFS);
1435 }
1436
1437 /*
1438 * extend a lock on a file
1439 */
yfs_fs_extend_lock(struct afs_operation * op)1440 void yfs_fs_extend_lock(struct afs_operation *op)
1441 {
1442 struct afs_vnode_param *vp = &op->file[0];
1443 struct afs_call *call;
1444 __be32 *bp;
1445
1446 _enter("");
1447
1448 call = afs_alloc_flat_call(op->net, &yfs_RXYFSExtendLock,
1449 sizeof(__be32) * 2 +
1450 sizeof(struct yfs_xdr_YFSFid),
1451 sizeof(struct yfs_xdr_YFSFetchStatus) +
1452 sizeof(struct yfs_xdr_YFSVolSync));
1453 if (!call)
1454 return afs_op_nomem(op);
1455
1456 /* marshall the parameters */
1457 bp = call->request;
1458 bp = xdr_encode_u32(bp, YFSEXTENDLOCK);
1459 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1460 bp = xdr_encode_YFSFid(bp, &vp->fid);
1461 yfs_check_req(call, bp);
1462
1463 trace_afs_make_fs_call(call, &vp->fid);
1464 afs_make_op_call(op, call, GFP_NOFS);
1465 }
1466
1467 /*
1468 * release a lock on a file
1469 */
yfs_fs_release_lock(struct afs_operation * op)1470 void yfs_fs_release_lock(struct afs_operation *op)
1471 {
1472 struct afs_vnode_param *vp = &op->file[0];
1473 struct afs_call *call;
1474 __be32 *bp;
1475
1476 _enter("");
1477
1478 call = afs_alloc_flat_call(op->net, &yfs_RXYFSReleaseLock,
1479 sizeof(__be32) * 2 +
1480 sizeof(struct yfs_xdr_YFSFid),
1481 sizeof(struct yfs_xdr_YFSFetchStatus) +
1482 sizeof(struct yfs_xdr_YFSVolSync));
1483 if (!call)
1484 return afs_op_nomem(op);
1485
1486 /* marshall the parameters */
1487 bp = call->request;
1488 bp = xdr_encode_u32(bp, YFSRELEASELOCK);
1489 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1490 bp = xdr_encode_YFSFid(bp, &vp->fid);
1491 yfs_check_req(call, bp);
1492
1493 trace_afs_make_fs_call(call, &vp->fid);
1494 afs_make_op_call(op, call, GFP_NOFS);
1495 }
1496
1497 /*
1498 * Deliver a reply to YFS.FetchStatus
1499 */
yfs_deliver_fs_fetch_status(struct afs_call * call)1500 static int yfs_deliver_fs_fetch_status(struct afs_call *call)
1501 {
1502 struct afs_operation *op = call->op;
1503 struct afs_vnode_param *vp = &op->file[op->fetch_status.which];
1504 const __be32 *bp;
1505 int ret;
1506
1507 ret = afs_transfer_reply(call);
1508 if (ret < 0)
1509 return ret;
1510
1511 /* unmarshall the reply once we've received all of it */
1512 bp = call->buffer;
1513 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
1514 xdr_decode_YFSCallBack(&bp, call, &vp->scb);
1515 xdr_decode_YFSVolSync(&bp, &op->volsync);
1516
1517 _leave(" = 0 [done]");
1518 return 0;
1519 }
1520
1521 /*
1522 * YFS.FetchStatus operation type
1523 */
1524 static const struct afs_call_type yfs_RXYFSFetchStatus = {
1525 .name = "YFS.FetchStatus",
1526 .op = yfs_FS_FetchStatus,
1527 .deliver = yfs_deliver_fs_fetch_status,
1528 .destructor = afs_flat_call_destructor,
1529 };
1530
1531 /*
1532 * Fetch the status information for a fid without needing a vnode handle.
1533 */
yfs_fs_fetch_status(struct afs_operation * op)1534 void yfs_fs_fetch_status(struct afs_operation *op)
1535 {
1536 struct afs_vnode_param *vp = &op->file[op->fetch_status.which];
1537 struct afs_call *call;
1538 __be32 *bp;
1539
1540 _enter(",%x,{%llx:%llu},,",
1541 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1542
1543 call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchStatus,
1544 sizeof(__be32) * 2 +
1545 sizeof(struct yfs_xdr_YFSFid),
1546 sizeof(struct yfs_xdr_YFSFetchStatus) +
1547 sizeof(struct yfs_xdr_YFSCallBack) +
1548 sizeof(struct yfs_xdr_YFSVolSync));
1549 if (!call)
1550 return afs_op_nomem(op);
1551
1552 /* marshall the parameters */
1553 bp = call->request;
1554 bp = xdr_encode_u32(bp, YFSFETCHSTATUS);
1555 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1556 bp = xdr_encode_YFSFid(bp, &vp->fid);
1557 yfs_check_req(call, bp);
1558
1559 trace_afs_make_fs_call(call, &vp->fid);
1560 afs_make_op_call(op, call, GFP_NOFS);
1561 }
1562
1563 /*
1564 * Deliver reply data to an YFS.InlineBulkStatus call
1565 */
yfs_deliver_fs_inline_bulk_status(struct afs_call * call)1566 static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
1567 {
1568 struct afs_operation *op = call->op;
1569 struct afs_status_cb *scb;
1570 const __be32 *bp;
1571 u32 tmp;
1572 int ret;
1573
1574 _enter("{%u}", call->unmarshall);
1575
1576 switch (call->unmarshall) {
1577 case 0:
1578 afs_extract_to_tmp(call);
1579 call->unmarshall++;
1580 fallthrough;
1581
1582 /* Extract the file status count and array in two steps */
1583 case 1:
1584 _debug("extract status count");
1585 ret = afs_extract_data(call, true);
1586 if (ret < 0)
1587 return ret;
1588
1589 tmp = ntohl(call->tmp);
1590 _debug("status count: %u/%u", tmp, op->nr_files);
1591 if (tmp != op->nr_files)
1592 return afs_protocol_error(call, afs_eproto_ibulkst_count);
1593
1594 call->count = 0;
1595 call->unmarshall++;
1596 more_counts:
1597 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchStatus));
1598 fallthrough;
1599
1600 case 2:
1601 _debug("extract status array %u", call->count);
1602 ret = afs_extract_data(call, true);
1603 if (ret < 0)
1604 return ret;
1605
1606 switch (call->count) {
1607 case 0:
1608 scb = &op->file[0].scb;
1609 break;
1610 case 1:
1611 scb = &op->file[1].scb;
1612 break;
1613 default:
1614 scb = &op->more_files[call->count - 2].scb;
1615 break;
1616 }
1617
1618 bp = call->buffer;
1619 xdr_decode_YFSFetchStatus(&bp, call, scb);
1620
1621 call->count++;
1622 if (call->count < op->nr_files)
1623 goto more_counts;
1624
1625 call->count = 0;
1626 call->unmarshall++;
1627 afs_extract_to_tmp(call);
1628 fallthrough;
1629
1630 /* Extract the callback count and array in two steps */
1631 case 3:
1632 _debug("extract CB count");
1633 ret = afs_extract_data(call, true);
1634 if (ret < 0)
1635 return ret;
1636
1637 tmp = ntohl(call->tmp);
1638 _debug("CB count: %u", tmp);
1639 if (tmp != op->nr_files)
1640 return afs_protocol_error(call, afs_eproto_ibulkst_cb_count);
1641 call->count = 0;
1642 call->unmarshall++;
1643 more_cbs:
1644 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSCallBack));
1645 fallthrough;
1646
1647 case 4:
1648 _debug("extract CB array");
1649 ret = afs_extract_data(call, true);
1650 if (ret < 0)
1651 return ret;
1652
1653 _debug("unmarshall CB array");
1654 switch (call->count) {
1655 case 0:
1656 scb = &op->file[0].scb;
1657 break;
1658 case 1:
1659 scb = &op->file[1].scb;
1660 break;
1661 default:
1662 scb = &op->more_files[call->count - 2].scb;
1663 break;
1664 }
1665
1666 bp = call->buffer;
1667 xdr_decode_YFSCallBack(&bp, call, scb);
1668 call->count++;
1669 if (call->count < op->nr_files)
1670 goto more_cbs;
1671
1672 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSVolSync));
1673 call->unmarshall++;
1674 fallthrough;
1675
1676 case 5:
1677 ret = afs_extract_data(call, false);
1678 if (ret < 0)
1679 return ret;
1680
1681 bp = call->buffer;
1682 xdr_decode_YFSVolSync(&bp, &op->volsync);
1683
1684 call->unmarshall++;
1685 fallthrough;
1686
1687 case 6:
1688 break;
1689 }
1690
1691 _leave(" = 0 [done]");
1692 return 0;
1693 }
1694
1695 /*
1696 * FS.InlineBulkStatus operation type
1697 */
1698 static const struct afs_call_type yfs_RXYFSInlineBulkStatus = {
1699 .name = "YFS.InlineBulkStatus",
1700 .op = yfs_FS_InlineBulkStatus,
1701 .deliver = yfs_deliver_fs_inline_bulk_status,
1702 .destructor = afs_flat_call_destructor,
1703 };
1704
1705 /*
1706 * Fetch the status information for up to 1024 files
1707 */
yfs_fs_inline_bulk_status(struct afs_operation * op)1708 void yfs_fs_inline_bulk_status(struct afs_operation *op)
1709 {
1710 struct afs_vnode_param *dvp = &op->file[0];
1711 struct afs_vnode_param *vp = &op->file[1];
1712 struct afs_call *call;
1713 __be32 *bp;
1714 int i;
1715
1716 _enter(",%x,{%llx:%llu},%u",
1717 key_serial(op->key), vp->fid.vid, vp->fid.vnode, op->nr_files);
1718
1719 call = afs_alloc_flat_call(op->net, &yfs_RXYFSInlineBulkStatus,
1720 sizeof(__be32) +
1721 sizeof(__be32) +
1722 sizeof(__be32) +
1723 sizeof(struct yfs_xdr_YFSFid) * op->nr_files,
1724 sizeof(struct yfs_xdr_YFSFetchStatus));
1725 if (!call)
1726 return afs_op_nomem(op);
1727
1728 /* marshall the parameters */
1729 bp = call->request;
1730 bp = xdr_encode_u32(bp, YFSINLINEBULKSTATUS);
1731 bp = xdr_encode_u32(bp, 0); /* RPCFlags */
1732 bp = xdr_encode_u32(bp, op->nr_files);
1733 bp = xdr_encode_YFSFid(bp, &dvp->fid);
1734 bp = xdr_encode_YFSFid(bp, &vp->fid);
1735 for (i = 0; i < op->nr_files - 2; i++)
1736 bp = xdr_encode_YFSFid(bp, &op->more_files[i].fid);
1737 yfs_check_req(call, bp);
1738
1739 trace_afs_make_fs_call(call, &vp->fid);
1740 afs_make_op_call(op, call, GFP_NOFS);
1741 }
1742
1743 /*
1744 * Deliver reply data to an YFS.FetchOpaqueACL.
1745 */
yfs_deliver_fs_fetch_opaque_acl(struct afs_call * call)1746 static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call)
1747 {
1748 struct afs_operation *op = call->op;
1749 struct afs_vnode_param *vp = &op->file[0];
1750 struct yfs_acl *yacl = op->yacl;
1751 struct afs_acl *acl;
1752 const __be32 *bp;
1753 unsigned int size;
1754 int ret;
1755
1756 _enter("{%u}", call->unmarshall);
1757
1758 switch (call->unmarshall) {
1759 case 0:
1760 afs_extract_to_tmp(call);
1761 call->unmarshall++;
1762 fallthrough;
1763
1764 /* Extract the file ACL length */
1765 case 1:
1766 ret = afs_extract_data(call, true);
1767 if (ret < 0)
1768 return ret;
1769
1770 size = call->count2 = ntohl(call->tmp);
1771 size = round_up(size, 4);
1772
1773 if (yacl->flags & YFS_ACL_WANT_ACL) {
1774 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
1775 if (!acl)
1776 return -ENOMEM;
1777 yacl->acl = acl;
1778 acl->size = call->count2;
1779 afs_extract_begin(call, acl->data, size);
1780 } else {
1781 afs_extract_discard(call, size);
1782 }
1783 call->unmarshall++;
1784 fallthrough;
1785
1786 /* Extract the file ACL */
1787 case 2:
1788 ret = afs_extract_data(call, true);
1789 if (ret < 0)
1790 return ret;
1791
1792 afs_extract_to_tmp(call);
1793 call->unmarshall++;
1794 fallthrough;
1795
1796 /* Extract the volume ACL length */
1797 case 3:
1798 ret = afs_extract_data(call, true);
1799 if (ret < 0)
1800 return ret;
1801
1802 size = call->count2 = ntohl(call->tmp);
1803 size = round_up(size, 4);
1804
1805 if (yacl->flags & YFS_ACL_WANT_VOL_ACL) {
1806 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
1807 if (!acl)
1808 return -ENOMEM;
1809 yacl->vol_acl = acl;
1810 acl->size = call->count2;
1811 afs_extract_begin(call, acl->data, size);
1812 } else {
1813 afs_extract_discard(call, size);
1814 }
1815 call->unmarshall++;
1816 fallthrough;
1817
1818 /* Extract the volume ACL */
1819 case 4:
1820 ret = afs_extract_data(call, true);
1821 if (ret < 0)
1822 return ret;
1823
1824 afs_extract_to_buf(call,
1825 sizeof(__be32) * 2 +
1826 sizeof(struct yfs_xdr_YFSFetchStatus) +
1827 sizeof(struct yfs_xdr_YFSVolSync));
1828 call->unmarshall++;
1829 fallthrough;
1830
1831 /* extract the metadata */
1832 case 5:
1833 ret = afs_extract_data(call, false);
1834 if (ret < 0)
1835 return ret;
1836
1837 bp = call->buffer;
1838 yacl->inherit_flag = ntohl(*bp++);
1839 yacl->num_cleaned = ntohl(*bp++);
1840 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
1841 xdr_decode_YFSVolSync(&bp, &op->volsync);
1842
1843 call->unmarshall++;
1844 fallthrough;
1845
1846 case 6:
1847 break;
1848 }
1849
1850 _leave(" = 0 [done]");
1851 return 0;
1852 }
1853
yfs_free_opaque_acl(struct yfs_acl * yacl)1854 void yfs_free_opaque_acl(struct yfs_acl *yacl)
1855 {
1856 if (yacl) {
1857 kfree(yacl->acl);
1858 kfree(yacl->vol_acl);
1859 kfree(yacl);
1860 }
1861 }
1862
1863 /*
1864 * YFS.FetchOpaqueACL operation type
1865 */
1866 static const struct afs_call_type yfs_RXYFSFetchOpaqueACL = {
1867 .name = "YFS.FetchOpaqueACL",
1868 .op = yfs_FS_FetchOpaqueACL,
1869 .deliver = yfs_deliver_fs_fetch_opaque_acl,
1870 .destructor = afs_flat_call_destructor,
1871 };
1872
1873 /*
1874 * Fetch the YFS advanced ACLs for a file.
1875 */
yfs_fs_fetch_opaque_acl(struct afs_operation * op)1876 void yfs_fs_fetch_opaque_acl(struct afs_operation *op)
1877 {
1878 struct afs_vnode_param *vp = &op->file[0];
1879 struct afs_call *call;
1880 __be32 *bp;
1881
1882 _enter(",%x,{%llx:%llu},,",
1883 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1884
1885 call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchOpaqueACL,
1886 sizeof(__be32) * 2 +
1887 sizeof(struct yfs_xdr_YFSFid),
1888 sizeof(__be32) * 2 +
1889 sizeof(struct yfs_xdr_YFSFetchStatus) +
1890 sizeof(struct yfs_xdr_YFSVolSync));
1891 if (!call)
1892 return afs_op_nomem(op);
1893
1894 /* marshall the parameters */
1895 bp = call->request;
1896 bp = xdr_encode_u32(bp, YFSFETCHOPAQUEACL);
1897 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1898 bp = xdr_encode_YFSFid(bp, &vp->fid);
1899 yfs_check_req(call, bp);
1900
1901 trace_afs_make_fs_call(call, &vp->fid);
1902 afs_make_op_call(op, call, GFP_KERNEL);
1903 }
1904
1905 /*
1906 * YFS.StoreOpaqueACL2 operation type
1907 */
1908 static const struct afs_call_type yfs_RXYFSStoreOpaqueACL2 = {
1909 .name = "YFS.StoreOpaqueACL2",
1910 .op = yfs_FS_StoreOpaqueACL2,
1911 .deliver = yfs_deliver_status_and_volsync,
1912 .destructor = afs_flat_call_destructor,
1913 };
1914
1915 /*
1916 * Fetch the YFS ACL for a file.
1917 */
yfs_fs_store_opaque_acl2(struct afs_operation * op)1918 void yfs_fs_store_opaque_acl2(struct afs_operation *op)
1919 {
1920 struct afs_vnode_param *vp = &op->file[0];
1921 struct afs_call *call;
1922 struct afs_acl *acl = op->acl;
1923 size_t size;
1924 __be32 *bp;
1925
1926 _enter(",%x,{%llx:%llu},,",
1927 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1928
1929 size = round_up(acl->size, 4);
1930 call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreOpaqueACL2,
1931 sizeof(__be32) * 2 +
1932 sizeof(struct yfs_xdr_YFSFid) +
1933 sizeof(__be32) + size,
1934 sizeof(struct yfs_xdr_YFSFetchStatus) +
1935 sizeof(struct yfs_xdr_YFSVolSync));
1936 if (!call)
1937 return afs_op_nomem(op);
1938
1939 /* marshall the parameters */
1940 bp = call->request;
1941 bp = xdr_encode_u32(bp, YFSSTOREOPAQUEACL2);
1942 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1943 bp = xdr_encode_YFSFid(bp, &vp->fid);
1944 bp = xdr_encode_u32(bp, acl->size);
1945 memcpy(bp, acl->data, acl->size);
1946 if (acl->size != size)
1947 memset((void *)bp + acl->size, 0, size - acl->size);
1948 bp += size / sizeof(__be32);
1949 yfs_check_req(call, bp);
1950
1951 trace_afs_make_fs_call(call, &vp->fid);
1952 afs_make_op_call(op, call, GFP_KERNEL);
1953 }
1954