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 call->abort_code == RXGEN_OPCODE)) {
660 set_bit(AFS_SERVER_FL_NO_RM2, &call->op->server->flags);
661 call->op->flags |= AFS_OPERATION_DOWNGRADE;
662 }
663 }
664
665 /*
666 * YFS.RemoveFile2 operation type.
667 */
668 static const struct afs_call_type yfs_RXYFSRemoveFile2 = {
669 .name = "YFS.RemoveFile2",
670 .op = yfs_FS_RemoveFile2,
671 .deliver = yfs_deliver_fs_remove_file2,
672 .done = yfs_done_fs_remove_file2,
673 .destructor = afs_flat_call_destructor,
674 };
675
676 /*
677 * Remove a file and retrieve new file status.
678 */
yfs_fs_remove_file2(struct afs_operation * op)679 void yfs_fs_remove_file2(struct afs_operation *op)
680 {
681 struct afs_vnode_param *dvp = &op->file[0];
682 const struct qstr *name = &op->dentry->d_name;
683 struct afs_call *call;
684 __be32 *bp;
685
686 _enter("");
687
688 call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveFile2,
689 sizeof(__be32) +
690 sizeof(struct yfs_xdr_RPCFlags) +
691 sizeof(struct yfs_xdr_YFSFid) +
692 xdr_strlen(name->len),
693 sizeof(struct yfs_xdr_YFSFetchStatus) +
694 sizeof(struct yfs_xdr_YFSFid) +
695 sizeof(struct yfs_xdr_YFSFetchStatus) +
696 sizeof(struct yfs_xdr_YFSVolSync));
697 if (!call)
698 return afs_op_nomem(op);
699
700 /* marshall the parameters */
701 bp = call->request;
702 bp = xdr_encode_u32(bp, YFSREMOVEFILE2);
703 bp = xdr_encode_u32(bp, 0); /* RPC flags */
704 bp = xdr_encode_YFSFid(bp, &dvp->fid);
705 bp = xdr_encode_name(bp, name);
706 yfs_check_req(call, bp);
707
708 trace_afs_make_fs_call1(call, &dvp->fid, name);
709 afs_make_op_call(op, call, GFP_NOFS);
710 }
711
712 /*
713 * Deliver reply data to a YFS.RemoveFile or YFS.RemoveDir operation.
714 */
yfs_deliver_fs_remove(struct afs_call * call)715 static int yfs_deliver_fs_remove(struct afs_call *call)
716 {
717 struct afs_operation *op = call->op;
718 struct afs_vnode_param *dvp = &op->file[0];
719 const __be32 *bp;
720 int ret;
721
722 _enter("{%u}", call->unmarshall);
723
724 ret = afs_transfer_reply(call);
725 if (ret < 0)
726 return ret;
727
728 bp = call->buffer;
729 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
730 xdr_decode_YFSVolSync(&bp, &op->volsync);
731 return 0;
732 }
733
734 /*
735 * FS.RemoveDir and FS.RemoveFile operation types.
736 */
737 static const struct afs_call_type yfs_RXYFSRemoveFile = {
738 .name = "YFS.RemoveFile",
739 .op = yfs_FS_RemoveFile,
740 .deliver = yfs_deliver_fs_remove,
741 .destructor = afs_flat_call_destructor,
742 };
743
744 /*
745 * Remove a file.
746 */
yfs_fs_remove_file(struct afs_operation * op)747 void yfs_fs_remove_file(struct afs_operation *op)
748 {
749 const struct qstr *name = &op->dentry->d_name;
750 struct afs_vnode_param *dvp = &op->file[0];
751 struct afs_call *call;
752 __be32 *bp;
753
754 _enter("");
755
756 if (!test_bit(AFS_SERVER_FL_NO_RM2, &op->server->flags))
757 return yfs_fs_remove_file2(op);
758
759 call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveFile,
760 sizeof(__be32) +
761 sizeof(struct yfs_xdr_RPCFlags) +
762 sizeof(struct yfs_xdr_YFSFid) +
763 xdr_strlen(name->len),
764 sizeof(struct yfs_xdr_YFSFetchStatus) +
765 sizeof(struct yfs_xdr_YFSVolSync));
766 if (!call)
767 return afs_op_nomem(op);
768
769 /* marshall the parameters */
770 bp = call->request;
771 bp = xdr_encode_u32(bp, YFSREMOVEFILE);
772 bp = xdr_encode_u32(bp, 0); /* RPC flags */
773 bp = xdr_encode_YFSFid(bp, &dvp->fid);
774 bp = xdr_encode_name(bp, name);
775 yfs_check_req(call, bp);
776
777 trace_afs_make_fs_call1(call, &dvp->fid, name);
778 afs_make_op_call(op, call, GFP_NOFS);
779 }
780
781 static const struct afs_call_type yfs_RXYFSRemoveDir = {
782 .name = "YFS.RemoveDir",
783 .op = yfs_FS_RemoveDir,
784 .deliver = yfs_deliver_fs_remove,
785 .destructor = afs_flat_call_destructor,
786 };
787
788 /*
789 * Remove a directory.
790 */
yfs_fs_remove_dir(struct afs_operation * op)791 void yfs_fs_remove_dir(struct afs_operation *op)
792 {
793 const struct qstr *name = &op->dentry->d_name;
794 struct afs_vnode_param *dvp = &op->file[0];
795 struct afs_call *call;
796 __be32 *bp;
797
798 _enter("");
799
800 call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveDir,
801 sizeof(__be32) +
802 sizeof(struct yfs_xdr_RPCFlags) +
803 sizeof(struct yfs_xdr_YFSFid) +
804 xdr_strlen(name->len),
805 sizeof(struct yfs_xdr_YFSFetchStatus) +
806 sizeof(struct yfs_xdr_YFSVolSync));
807 if (!call)
808 return afs_op_nomem(op);
809
810 /* marshall the parameters */
811 bp = call->request;
812 bp = xdr_encode_u32(bp, YFSREMOVEDIR);
813 bp = xdr_encode_u32(bp, 0); /* RPC flags */
814 bp = xdr_encode_YFSFid(bp, &dvp->fid);
815 bp = xdr_encode_name(bp, name);
816 yfs_check_req(call, bp);
817
818 trace_afs_make_fs_call1(call, &dvp->fid, name);
819 afs_make_op_call(op, call, GFP_NOFS);
820 }
821
822 /*
823 * Deliver reply data to a YFS.Link operation.
824 */
yfs_deliver_fs_link(struct afs_call * call)825 static int yfs_deliver_fs_link(struct afs_call *call)
826 {
827 struct afs_operation *op = call->op;
828 struct afs_vnode_param *dvp = &op->file[0];
829 struct afs_vnode_param *vp = &op->file[1];
830 const __be32 *bp;
831 int ret;
832
833 _enter("{%u}", call->unmarshall);
834
835 ret = afs_transfer_reply(call);
836 if (ret < 0)
837 return ret;
838
839 bp = call->buffer;
840 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
841 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
842 xdr_decode_YFSVolSync(&bp, &op->volsync);
843 _leave(" = 0 [done]");
844 return 0;
845 }
846
847 /*
848 * YFS.Link operation type.
849 */
850 static const struct afs_call_type yfs_RXYFSLink = {
851 .name = "YFS.Link",
852 .op = yfs_FS_Link,
853 .deliver = yfs_deliver_fs_link,
854 .destructor = afs_flat_call_destructor,
855 };
856
857 /*
858 * Make a hard link.
859 */
yfs_fs_link(struct afs_operation * op)860 void yfs_fs_link(struct afs_operation *op)
861 {
862 const struct qstr *name = &op->dentry->d_name;
863 struct afs_vnode_param *dvp = &op->file[0];
864 struct afs_vnode_param *vp = &op->file[1];
865 struct afs_call *call;
866 __be32 *bp;
867
868 _enter("");
869
870 call = afs_alloc_flat_call(op->net, &yfs_RXYFSLink,
871 sizeof(__be32) +
872 sizeof(struct yfs_xdr_RPCFlags) +
873 sizeof(struct yfs_xdr_YFSFid) +
874 xdr_strlen(name->len) +
875 sizeof(struct yfs_xdr_YFSFid),
876 sizeof(struct yfs_xdr_YFSFetchStatus) +
877 sizeof(struct yfs_xdr_YFSFetchStatus) +
878 sizeof(struct yfs_xdr_YFSVolSync));
879 if (!call)
880 return afs_op_nomem(op);
881
882 /* marshall the parameters */
883 bp = call->request;
884 bp = xdr_encode_u32(bp, YFSLINK);
885 bp = xdr_encode_u32(bp, 0); /* RPC flags */
886 bp = xdr_encode_YFSFid(bp, &dvp->fid);
887 bp = xdr_encode_name(bp, name);
888 bp = xdr_encode_YFSFid(bp, &vp->fid);
889 yfs_check_req(call, bp);
890
891 trace_afs_make_fs_call1(call, &vp->fid, name);
892 afs_make_op_call(op, call, GFP_NOFS);
893 }
894
895 /*
896 * Deliver reply data to a YFS.Symlink operation.
897 */
yfs_deliver_fs_symlink(struct afs_call * call)898 static int yfs_deliver_fs_symlink(struct afs_call *call)
899 {
900 struct afs_operation *op = call->op;
901 struct afs_vnode_param *dvp = &op->file[0];
902 struct afs_vnode_param *vp = &op->file[1];
903 const __be32 *bp;
904 int ret;
905
906 _enter("{%u}", call->unmarshall);
907
908 ret = afs_transfer_reply(call);
909 if (ret < 0)
910 return ret;
911
912 /* unmarshall the reply once we've received all of it */
913 bp = call->buffer;
914 xdr_decode_YFSFid(&bp, &vp->fid);
915 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
916 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
917 xdr_decode_YFSVolSync(&bp, &op->volsync);
918
919 _leave(" = 0 [done]");
920 return 0;
921 }
922
923 /*
924 * YFS.Symlink operation type
925 */
926 static const struct afs_call_type yfs_RXYFSSymlink = {
927 .name = "YFS.Symlink",
928 .op = yfs_FS_Symlink,
929 .deliver = yfs_deliver_fs_symlink,
930 .destructor = afs_flat_call_destructor,
931 };
932
933 /*
934 * Create a symbolic link.
935 */
yfs_fs_symlink(struct afs_operation * op)936 void yfs_fs_symlink(struct afs_operation *op)
937 {
938 const struct qstr *name = &op->dentry->d_name;
939 struct afs_vnode_param *dvp = &op->file[0];
940 struct afs_call *call;
941 size_t contents_sz;
942 mode_t mode = 0777;
943 __be32 *bp;
944
945 _enter("");
946
947 contents_sz = strlen(op->create.symlink);
948 call = afs_alloc_flat_call(op->net, &yfs_RXYFSSymlink,
949 sizeof(__be32) +
950 sizeof(struct yfs_xdr_RPCFlags) +
951 sizeof(struct yfs_xdr_YFSFid) +
952 xdr_strlen(name->len) +
953 xdr_strlen(contents_sz) +
954 sizeof(struct yfs_xdr_YFSStoreStatus),
955 sizeof(struct yfs_xdr_YFSFid) +
956 sizeof(struct yfs_xdr_YFSFetchStatus) +
957 sizeof(struct yfs_xdr_YFSFetchStatus) +
958 sizeof(struct yfs_xdr_YFSVolSync));
959 if (!call)
960 return afs_op_nomem(op);
961
962 /* marshall the parameters */
963 bp = call->request;
964 bp = xdr_encode_u32(bp, YFSSYMLINK);
965 bp = xdr_encode_u32(bp, 0); /* RPC flags */
966 bp = xdr_encode_YFSFid(bp, &dvp->fid);
967 bp = xdr_encode_name(bp, name);
968 bp = xdr_encode_string(bp, op->create.symlink, contents_sz);
969 bp = xdr_encode_YFSStoreStatus(bp, &mode, &op->mtime);
970 yfs_check_req(call, bp);
971
972 trace_afs_make_fs_call1(call, &dvp->fid, name);
973 afs_make_op_call(op, call, GFP_NOFS);
974 }
975
976 /*
977 * Deliver reply data to a YFS.Rename operation.
978 */
yfs_deliver_fs_rename(struct afs_call * call)979 static int yfs_deliver_fs_rename(struct afs_call *call)
980 {
981 struct afs_operation *op = call->op;
982 struct afs_vnode_param *orig_dvp = &op->file[0];
983 struct afs_vnode_param *new_dvp = &op->file[1];
984 const __be32 *bp;
985 int ret;
986
987 _enter("{%u}", call->unmarshall);
988
989 ret = afs_transfer_reply(call);
990 if (ret < 0)
991 return ret;
992
993 bp = call->buffer;
994 /* If the two dirs are the same, we have two copies of the same status
995 * report, so we just decode it twice.
996 */
997 xdr_decode_YFSFetchStatus(&bp, call, &orig_dvp->scb);
998 xdr_decode_YFSFetchStatus(&bp, call, &new_dvp->scb);
999 xdr_decode_YFSVolSync(&bp, &op->volsync);
1000 _leave(" = 0 [done]");
1001 return 0;
1002 }
1003
1004 /*
1005 * YFS.Rename operation type
1006 */
1007 static const struct afs_call_type yfs_RXYFSRename = {
1008 .name = "FS.Rename",
1009 .op = yfs_FS_Rename,
1010 .deliver = yfs_deliver_fs_rename,
1011 .destructor = afs_flat_call_destructor,
1012 };
1013
1014 /*
1015 * Rename a file or directory.
1016 */
yfs_fs_rename(struct afs_operation * op)1017 void yfs_fs_rename(struct afs_operation *op)
1018 {
1019 struct afs_vnode_param *orig_dvp = &op->file[0];
1020 struct afs_vnode_param *new_dvp = &op->file[1];
1021 const struct qstr *orig_name = &op->dentry->d_name;
1022 const struct qstr *new_name = &op->dentry_2->d_name;
1023 struct afs_call *call;
1024 __be32 *bp;
1025
1026 _enter("");
1027
1028 call = afs_alloc_flat_call(op->net, &yfs_RXYFSRename,
1029 sizeof(__be32) +
1030 sizeof(struct yfs_xdr_RPCFlags) +
1031 sizeof(struct yfs_xdr_YFSFid) +
1032 xdr_strlen(orig_name->len) +
1033 sizeof(struct yfs_xdr_YFSFid) +
1034 xdr_strlen(new_name->len),
1035 sizeof(struct yfs_xdr_YFSFetchStatus) +
1036 sizeof(struct yfs_xdr_YFSFetchStatus) +
1037 sizeof(struct yfs_xdr_YFSVolSync));
1038 if (!call)
1039 return afs_op_nomem(op);
1040
1041 /* marshall the parameters */
1042 bp = call->request;
1043 bp = xdr_encode_u32(bp, YFSRENAME);
1044 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1045 bp = xdr_encode_YFSFid(bp, &orig_dvp->fid);
1046 bp = xdr_encode_name(bp, orig_name);
1047 bp = xdr_encode_YFSFid(bp, &new_dvp->fid);
1048 bp = xdr_encode_name(bp, new_name);
1049 yfs_check_req(call, bp);
1050
1051 trace_afs_make_fs_call2(call, &orig_dvp->fid, orig_name, new_name);
1052 afs_make_op_call(op, call, GFP_NOFS);
1053 }
1054
1055 /*
1056 * YFS.StoreData64 operation type.
1057 */
1058 static const struct afs_call_type yfs_RXYFSStoreData64 = {
1059 .name = "YFS.StoreData64",
1060 .op = yfs_FS_StoreData64,
1061 .deliver = yfs_deliver_status_and_volsync,
1062 .destructor = afs_flat_call_destructor,
1063 };
1064
1065 /*
1066 * Store a set of pages to a large file.
1067 */
yfs_fs_store_data(struct afs_operation * op)1068 void yfs_fs_store_data(struct afs_operation *op)
1069 {
1070 struct afs_vnode_param *vp = &op->file[0];
1071 struct afs_call *call;
1072 __be32 *bp;
1073
1074 _enter(",%x,{%llx:%llu},,",
1075 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1076
1077 _debug("size %llx, at %llx, i_size %llx",
1078 (unsigned long long)op->store.size,
1079 (unsigned long long)op->store.pos,
1080 (unsigned long long)op->store.i_size);
1081
1082 call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreData64,
1083 sizeof(__be32) +
1084 sizeof(__be32) +
1085 sizeof(struct yfs_xdr_YFSFid) +
1086 sizeof(struct yfs_xdr_YFSStoreStatus) +
1087 sizeof(struct yfs_xdr_u64) * 3,
1088 sizeof(struct yfs_xdr_YFSFetchStatus) +
1089 sizeof(struct yfs_xdr_YFSVolSync));
1090 if (!call)
1091 return afs_op_nomem(op);
1092
1093 call->write_iter = op->store.write_iter;
1094
1095 /* marshall the parameters */
1096 bp = call->request;
1097 bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1098 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1099 bp = xdr_encode_YFSFid(bp, &vp->fid);
1100 bp = xdr_encode_YFSStoreStatus(bp, NULL, &op->mtime);
1101 bp = xdr_encode_u64(bp, op->store.pos);
1102 bp = xdr_encode_u64(bp, op->store.size);
1103 bp = xdr_encode_u64(bp, op->store.i_size);
1104 yfs_check_req(call, bp);
1105
1106 trace_afs_make_fs_call(call, &vp->fid);
1107 afs_make_op_call(op, call, GFP_NOFS);
1108 }
1109
1110 /*
1111 * YFS.StoreStatus operation type
1112 */
1113 static const struct afs_call_type yfs_RXYFSStoreStatus = {
1114 .name = "YFS.StoreStatus",
1115 .op = yfs_FS_StoreStatus,
1116 .deliver = yfs_deliver_status_and_volsync,
1117 .destructor = afs_flat_call_destructor,
1118 };
1119
1120 static const struct afs_call_type yfs_RXYFSStoreData64_as_Status = {
1121 .name = "YFS.StoreData64",
1122 .op = yfs_FS_StoreData64,
1123 .deliver = yfs_deliver_status_and_volsync,
1124 .destructor = afs_flat_call_destructor,
1125 };
1126
1127 /*
1128 * Set the attributes on a file, using YFS.StoreData64 rather than
1129 * YFS.StoreStatus so as to alter the file size also.
1130 */
yfs_fs_setattr_size(struct afs_operation * op)1131 static void yfs_fs_setattr_size(struct afs_operation *op)
1132 {
1133 struct afs_vnode_param *vp = &op->file[0];
1134 struct afs_call *call;
1135 struct iattr *attr = op->setattr.attr;
1136 __be32 *bp;
1137
1138 _enter(",%x,{%llx:%llu},,",
1139 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1140
1141 call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreData64_as_Status,
1142 sizeof(__be32) * 2 +
1143 sizeof(struct yfs_xdr_YFSFid) +
1144 sizeof(struct yfs_xdr_YFSStoreStatus) +
1145 sizeof(struct yfs_xdr_u64) * 3,
1146 sizeof(struct yfs_xdr_YFSFetchStatus) +
1147 sizeof(struct yfs_xdr_YFSVolSync));
1148 if (!call)
1149 return afs_op_nomem(op);
1150
1151 /* marshall the parameters */
1152 bp = call->request;
1153 bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1154 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1155 bp = xdr_encode_YFSFid(bp, &vp->fid);
1156 bp = xdr_encode_YFS_StoreStatus(bp, attr);
1157 bp = xdr_encode_u64(bp, attr->ia_size); /* position of start of write */
1158 bp = xdr_encode_u64(bp, 0); /* size of write */
1159 bp = xdr_encode_u64(bp, attr->ia_size); /* new file length */
1160 yfs_check_req(call, bp);
1161
1162 trace_afs_make_fs_call(call, &vp->fid);
1163 afs_make_op_call(op, call, GFP_NOFS);
1164 }
1165
1166 /*
1167 * Set the attributes on a file, using YFS.StoreData64 if there's a change in
1168 * file size, and YFS.StoreStatus otherwise.
1169 */
yfs_fs_setattr(struct afs_operation * op)1170 void yfs_fs_setattr(struct afs_operation *op)
1171 {
1172 struct afs_vnode_param *vp = &op->file[0];
1173 struct afs_call *call;
1174 struct iattr *attr = op->setattr.attr;
1175 __be32 *bp;
1176
1177 if (attr->ia_valid & ATTR_SIZE)
1178 return yfs_fs_setattr_size(op);
1179
1180 _enter(",%x,{%llx:%llu},,",
1181 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1182
1183 call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreStatus,
1184 sizeof(__be32) * 2 +
1185 sizeof(struct yfs_xdr_YFSFid) +
1186 sizeof(struct yfs_xdr_YFSStoreStatus),
1187 sizeof(struct yfs_xdr_YFSFetchStatus) +
1188 sizeof(struct yfs_xdr_YFSVolSync));
1189 if (!call)
1190 return afs_op_nomem(op);
1191
1192 /* marshall the parameters */
1193 bp = call->request;
1194 bp = xdr_encode_u32(bp, YFSSTORESTATUS);
1195 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1196 bp = xdr_encode_YFSFid(bp, &vp->fid);
1197 bp = xdr_encode_YFS_StoreStatus(bp, attr);
1198 yfs_check_req(call, bp);
1199
1200 trace_afs_make_fs_call(call, &vp->fid);
1201 afs_make_op_call(op, call, GFP_NOFS);
1202 }
1203
1204 /*
1205 * Deliver reply data to a YFS.GetVolumeStatus operation.
1206 */
yfs_deliver_fs_get_volume_status(struct afs_call * call)1207 static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
1208 {
1209 struct afs_operation *op = call->op;
1210 const __be32 *bp;
1211 char *p;
1212 u32 size;
1213 int ret;
1214
1215 _enter("{%u}", call->unmarshall);
1216
1217 switch (call->unmarshall) {
1218 case 0:
1219 call->unmarshall++;
1220 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchVolumeStatus));
1221 fallthrough;
1222
1223 /* extract the returned status record */
1224 case 1:
1225 _debug("extract status");
1226 ret = afs_extract_data(call, true);
1227 if (ret < 0)
1228 return ret;
1229
1230 bp = call->buffer;
1231 xdr_decode_YFSFetchVolumeStatus(&bp, &op->volstatus.vs);
1232 call->unmarshall++;
1233 afs_extract_to_tmp(call);
1234 fallthrough;
1235
1236 /* extract the volume name length */
1237 case 2:
1238 ret = afs_extract_data(call, true);
1239 if (ret < 0)
1240 return ret;
1241
1242 call->count = ntohl(call->tmp);
1243 _debug("volname length: %u", call->count);
1244 if (call->count >= AFSNAMEMAX)
1245 return afs_protocol_error(call, afs_eproto_volname_len);
1246 size = (call->count + 3) & ~3; /* It's padded */
1247 afs_extract_to_buf(call, size);
1248 call->unmarshall++;
1249 fallthrough;
1250
1251 /* extract the volume name */
1252 case 3:
1253 _debug("extract volname");
1254 ret = afs_extract_data(call, true);
1255 if (ret < 0)
1256 return ret;
1257
1258 p = call->buffer;
1259 p[call->count] = 0;
1260 _debug("volname '%s'", p);
1261 afs_extract_to_tmp(call);
1262 call->unmarshall++;
1263 fallthrough;
1264
1265 /* extract the offline message length */
1266 case 4:
1267 ret = afs_extract_data(call, true);
1268 if (ret < 0)
1269 return ret;
1270
1271 call->count = ntohl(call->tmp);
1272 _debug("offline msg length: %u", call->count);
1273 if (call->count >= AFSNAMEMAX)
1274 return afs_protocol_error(call, afs_eproto_offline_msg_len);
1275 size = (call->count + 3) & ~3; /* It's padded */
1276 afs_extract_to_buf(call, size);
1277 call->unmarshall++;
1278 fallthrough;
1279
1280 /* extract the offline message */
1281 case 5:
1282 _debug("extract offline");
1283 ret = afs_extract_data(call, true);
1284 if (ret < 0)
1285 return ret;
1286
1287 p = call->buffer;
1288 p[call->count] = 0;
1289 _debug("offline '%s'", p);
1290
1291 afs_extract_to_tmp(call);
1292 call->unmarshall++;
1293 fallthrough;
1294
1295 /* extract the message of the day length */
1296 case 6:
1297 ret = afs_extract_data(call, true);
1298 if (ret < 0)
1299 return ret;
1300
1301 call->count = ntohl(call->tmp);
1302 _debug("motd length: %u", call->count);
1303 if (call->count >= AFSNAMEMAX)
1304 return afs_protocol_error(call, afs_eproto_motd_len);
1305 size = (call->count + 3) & ~3; /* It's padded */
1306 afs_extract_to_buf(call, size);
1307 call->unmarshall++;
1308 fallthrough;
1309
1310 /* extract the message of the day */
1311 case 7:
1312 _debug("extract motd");
1313 ret = afs_extract_data(call, false);
1314 if (ret < 0)
1315 return ret;
1316
1317 p = call->buffer;
1318 p[call->count] = 0;
1319 _debug("motd '%s'", p);
1320
1321 call->unmarshall++;
1322 fallthrough;
1323
1324 case 8:
1325 break;
1326 }
1327
1328 _leave(" = 0 [done]");
1329 return 0;
1330 }
1331
1332 /*
1333 * YFS.GetVolumeStatus operation type
1334 */
1335 static const struct afs_call_type yfs_RXYFSGetVolumeStatus = {
1336 .name = "YFS.GetVolumeStatus",
1337 .op = yfs_FS_GetVolumeStatus,
1338 .deliver = yfs_deliver_fs_get_volume_status,
1339 .destructor = afs_flat_call_destructor,
1340 };
1341
1342 /*
1343 * fetch the status of a volume
1344 */
yfs_fs_get_volume_status(struct afs_operation * op)1345 void yfs_fs_get_volume_status(struct afs_operation *op)
1346 {
1347 struct afs_vnode_param *vp = &op->file[0];
1348 struct afs_call *call;
1349 __be32 *bp;
1350
1351 _enter("");
1352
1353 call = afs_alloc_flat_call(op->net, &yfs_RXYFSGetVolumeStatus,
1354 sizeof(__be32) * 2 +
1355 sizeof(struct yfs_xdr_u64),
1356 max_t(size_t,
1357 sizeof(struct yfs_xdr_YFSFetchVolumeStatus) +
1358 sizeof(__be32),
1359 AFSOPAQUEMAX + 1));
1360 if (!call)
1361 return afs_op_nomem(op);
1362
1363 /* marshall the parameters */
1364 bp = call->request;
1365 bp = xdr_encode_u32(bp, YFSGETVOLUMESTATUS);
1366 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1367 bp = xdr_encode_u64(bp, vp->fid.vid);
1368 yfs_check_req(call, bp);
1369
1370 trace_afs_make_fs_call(call, &vp->fid);
1371 afs_make_op_call(op, call, GFP_NOFS);
1372 }
1373
1374 /*
1375 * YFS.SetLock operation type
1376 */
1377 static const struct afs_call_type yfs_RXYFSSetLock = {
1378 .name = "YFS.SetLock",
1379 .op = yfs_FS_SetLock,
1380 .deliver = yfs_deliver_status_and_volsync,
1381 .done = afs_lock_op_done,
1382 .destructor = afs_flat_call_destructor,
1383 };
1384
1385 /*
1386 * YFS.ExtendLock operation type
1387 */
1388 static const struct afs_call_type yfs_RXYFSExtendLock = {
1389 .name = "YFS.ExtendLock",
1390 .op = yfs_FS_ExtendLock,
1391 .deliver = yfs_deliver_status_and_volsync,
1392 .done = afs_lock_op_done,
1393 .destructor = afs_flat_call_destructor,
1394 };
1395
1396 /*
1397 * YFS.ReleaseLock operation type
1398 */
1399 static const struct afs_call_type yfs_RXYFSReleaseLock = {
1400 .name = "YFS.ReleaseLock",
1401 .op = yfs_FS_ReleaseLock,
1402 .deliver = yfs_deliver_status_and_volsync,
1403 .destructor = afs_flat_call_destructor,
1404 };
1405
1406 /*
1407 * Set a lock on a file
1408 */
yfs_fs_set_lock(struct afs_operation * op)1409 void yfs_fs_set_lock(struct afs_operation *op)
1410 {
1411 struct afs_vnode_param *vp = &op->file[0];
1412 struct afs_call *call;
1413 __be32 *bp;
1414
1415 _enter("");
1416
1417 call = afs_alloc_flat_call(op->net, &yfs_RXYFSSetLock,
1418 sizeof(__be32) * 2 +
1419 sizeof(struct yfs_xdr_YFSFid) +
1420 sizeof(__be32),
1421 sizeof(struct yfs_xdr_YFSFetchStatus) +
1422 sizeof(struct yfs_xdr_YFSVolSync));
1423 if (!call)
1424 return afs_op_nomem(op);
1425
1426 /* marshall the parameters */
1427 bp = call->request;
1428 bp = xdr_encode_u32(bp, YFSSETLOCK);
1429 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1430 bp = xdr_encode_YFSFid(bp, &vp->fid);
1431 bp = xdr_encode_u32(bp, op->lock.type);
1432 yfs_check_req(call, bp);
1433
1434 trace_afs_make_fs_calli(call, &vp->fid, op->lock.type);
1435 afs_make_op_call(op, call, GFP_NOFS);
1436 }
1437
1438 /*
1439 * extend a lock on a file
1440 */
yfs_fs_extend_lock(struct afs_operation * op)1441 void yfs_fs_extend_lock(struct afs_operation *op)
1442 {
1443 struct afs_vnode_param *vp = &op->file[0];
1444 struct afs_call *call;
1445 __be32 *bp;
1446
1447 _enter("");
1448
1449 call = afs_alloc_flat_call(op->net, &yfs_RXYFSExtendLock,
1450 sizeof(__be32) * 2 +
1451 sizeof(struct yfs_xdr_YFSFid),
1452 sizeof(struct yfs_xdr_YFSFetchStatus) +
1453 sizeof(struct yfs_xdr_YFSVolSync));
1454 if (!call)
1455 return afs_op_nomem(op);
1456
1457 /* marshall the parameters */
1458 bp = call->request;
1459 bp = xdr_encode_u32(bp, YFSEXTENDLOCK);
1460 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1461 bp = xdr_encode_YFSFid(bp, &vp->fid);
1462 yfs_check_req(call, bp);
1463
1464 trace_afs_make_fs_call(call, &vp->fid);
1465 afs_make_op_call(op, call, GFP_NOFS);
1466 }
1467
1468 /*
1469 * release a lock on a file
1470 */
yfs_fs_release_lock(struct afs_operation * op)1471 void yfs_fs_release_lock(struct afs_operation *op)
1472 {
1473 struct afs_vnode_param *vp = &op->file[0];
1474 struct afs_call *call;
1475 __be32 *bp;
1476
1477 _enter("");
1478
1479 call = afs_alloc_flat_call(op->net, &yfs_RXYFSReleaseLock,
1480 sizeof(__be32) * 2 +
1481 sizeof(struct yfs_xdr_YFSFid),
1482 sizeof(struct yfs_xdr_YFSFetchStatus) +
1483 sizeof(struct yfs_xdr_YFSVolSync));
1484 if (!call)
1485 return afs_op_nomem(op);
1486
1487 /* marshall the parameters */
1488 bp = call->request;
1489 bp = xdr_encode_u32(bp, YFSRELEASELOCK);
1490 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1491 bp = xdr_encode_YFSFid(bp, &vp->fid);
1492 yfs_check_req(call, bp);
1493
1494 trace_afs_make_fs_call(call, &vp->fid);
1495 afs_make_op_call(op, call, GFP_NOFS);
1496 }
1497
1498 /*
1499 * Deliver a reply to YFS.FetchStatus
1500 */
yfs_deliver_fs_fetch_status(struct afs_call * call)1501 static int yfs_deliver_fs_fetch_status(struct afs_call *call)
1502 {
1503 struct afs_operation *op = call->op;
1504 struct afs_vnode_param *vp = &op->file[op->fetch_status.which];
1505 const __be32 *bp;
1506 int ret;
1507
1508 ret = afs_transfer_reply(call);
1509 if (ret < 0)
1510 return ret;
1511
1512 /* unmarshall the reply once we've received all of it */
1513 bp = call->buffer;
1514 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
1515 xdr_decode_YFSCallBack(&bp, call, &vp->scb);
1516 xdr_decode_YFSVolSync(&bp, &op->volsync);
1517
1518 _leave(" = 0 [done]");
1519 return 0;
1520 }
1521
1522 /*
1523 * YFS.FetchStatus operation type
1524 */
1525 static const struct afs_call_type yfs_RXYFSFetchStatus = {
1526 .name = "YFS.FetchStatus",
1527 .op = yfs_FS_FetchStatus,
1528 .deliver = yfs_deliver_fs_fetch_status,
1529 .destructor = afs_flat_call_destructor,
1530 };
1531
1532 /*
1533 * Fetch the status information for a fid without needing a vnode handle.
1534 */
yfs_fs_fetch_status(struct afs_operation * op)1535 void yfs_fs_fetch_status(struct afs_operation *op)
1536 {
1537 struct afs_vnode_param *vp = &op->file[op->fetch_status.which];
1538 struct afs_call *call;
1539 __be32 *bp;
1540
1541 _enter(",%x,{%llx:%llu},,",
1542 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1543
1544 call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchStatus,
1545 sizeof(__be32) * 2 +
1546 sizeof(struct yfs_xdr_YFSFid),
1547 sizeof(struct yfs_xdr_YFSFetchStatus) +
1548 sizeof(struct yfs_xdr_YFSCallBack) +
1549 sizeof(struct yfs_xdr_YFSVolSync));
1550 if (!call)
1551 return afs_op_nomem(op);
1552
1553 /* marshall the parameters */
1554 bp = call->request;
1555 bp = xdr_encode_u32(bp, YFSFETCHSTATUS);
1556 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1557 bp = xdr_encode_YFSFid(bp, &vp->fid);
1558 yfs_check_req(call, bp);
1559
1560 trace_afs_make_fs_call(call, &vp->fid);
1561 afs_make_op_call(op, call, GFP_NOFS);
1562 }
1563
1564 /*
1565 * Deliver reply data to an YFS.InlineBulkStatus call
1566 */
yfs_deliver_fs_inline_bulk_status(struct afs_call * call)1567 static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
1568 {
1569 struct afs_operation *op = call->op;
1570 struct afs_status_cb *scb;
1571 const __be32 *bp;
1572 u32 tmp;
1573 int ret;
1574
1575 _enter("{%u}", call->unmarshall);
1576
1577 switch (call->unmarshall) {
1578 case 0:
1579 afs_extract_to_tmp(call);
1580 call->unmarshall++;
1581 fallthrough;
1582
1583 /* Extract the file status count and array in two steps */
1584 case 1:
1585 _debug("extract status count");
1586 ret = afs_extract_data(call, true);
1587 if (ret < 0)
1588 return ret;
1589
1590 tmp = ntohl(call->tmp);
1591 _debug("status count: %u/%u", tmp, op->nr_files);
1592 if (tmp != op->nr_files)
1593 return afs_protocol_error(call, afs_eproto_ibulkst_count);
1594
1595 call->count = 0;
1596 call->unmarshall++;
1597 more_counts:
1598 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchStatus));
1599 fallthrough;
1600
1601 case 2:
1602 _debug("extract status array %u", call->count);
1603 ret = afs_extract_data(call, true);
1604 if (ret < 0)
1605 return ret;
1606
1607 switch (call->count) {
1608 case 0:
1609 scb = &op->file[0].scb;
1610 break;
1611 case 1:
1612 scb = &op->file[1].scb;
1613 break;
1614 default:
1615 scb = &op->more_files[call->count - 2].scb;
1616 break;
1617 }
1618
1619 bp = call->buffer;
1620 xdr_decode_YFSFetchStatus(&bp, call, scb);
1621
1622 call->count++;
1623 if (call->count < op->nr_files)
1624 goto more_counts;
1625
1626 call->count = 0;
1627 call->unmarshall++;
1628 afs_extract_to_tmp(call);
1629 fallthrough;
1630
1631 /* Extract the callback count and array in two steps */
1632 case 3:
1633 _debug("extract CB count");
1634 ret = afs_extract_data(call, true);
1635 if (ret < 0)
1636 return ret;
1637
1638 tmp = ntohl(call->tmp);
1639 _debug("CB count: %u", tmp);
1640 if (tmp != op->nr_files)
1641 return afs_protocol_error(call, afs_eproto_ibulkst_cb_count);
1642 call->count = 0;
1643 call->unmarshall++;
1644 more_cbs:
1645 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSCallBack));
1646 fallthrough;
1647
1648 case 4:
1649 _debug("extract CB array");
1650 ret = afs_extract_data(call, true);
1651 if (ret < 0)
1652 return ret;
1653
1654 _debug("unmarshall CB array");
1655 switch (call->count) {
1656 case 0:
1657 scb = &op->file[0].scb;
1658 break;
1659 case 1:
1660 scb = &op->file[1].scb;
1661 break;
1662 default:
1663 scb = &op->more_files[call->count - 2].scb;
1664 break;
1665 }
1666
1667 bp = call->buffer;
1668 xdr_decode_YFSCallBack(&bp, call, scb);
1669 call->count++;
1670 if (call->count < op->nr_files)
1671 goto more_cbs;
1672
1673 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSVolSync));
1674 call->unmarshall++;
1675 fallthrough;
1676
1677 case 5:
1678 ret = afs_extract_data(call, false);
1679 if (ret < 0)
1680 return ret;
1681
1682 bp = call->buffer;
1683 xdr_decode_YFSVolSync(&bp, &op->volsync);
1684
1685 call->unmarshall++;
1686 fallthrough;
1687
1688 case 6:
1689 break;
1690 }
1691
1692 _leave(" = 0 [done]");
1693 return 0;
1694 }
1695
1696 /*
1697 * FS.InlineBulkStatus operation type
1698 */
1699 static const struct afs_call_type yfs_RXYFSInlineBulkStatus = {
1700 .name = "YFS.InlineBulkStatus",
1701 .op = yfs_FS_InlineBulkStatus,
1702 .deliver = yfs_deliver_fs_inline_bulk_status,
1703 .destructor = afs_flat_call_destructor,
1704 };
1705
1706 /*
1707 * Fetch the status information for up to 1024 files
1708 */
yfs_fs_inline_bulk_status(struct afs_operation * op)1709 void yfs_fs_inline_bulk_status(struct afs_operation *op)
1710 {
1711 struct afs_vnode_param *dvp = &op->file[0];
1712 struct afs_vnode_param *vp = &op->file[1];
1713 struct afs_call *call;
1714 __be32 *bp;
1715 int i;
1716
1717 _enter(",%x,{%llx:%llu},%u",
1718 key_serial(op->key), vp->fid.vid, vp->fid.vnode, op->nr_files);
1719
1720 call = afs_alloc_flat_call(op->net, &yfs_RXYFSInlineBulkStatus,
1721 sizeof(__be32) +
1722 sizeof(__be32) +
1723 sizeof(__be32) +
1724 sizeof(struct yfs_xdr_YFSFid) * op->nr_files,
1725 sizeof(struct yfs_xdr_YFSFetchStatus));
1726 if (!call)
1727 return afs_op_nomem(op);
1728
1729 /* marshall the parameters */
1730 bp = call->request;
1731 bp = xdr_encode_u32(bp, YFSINLINEBULKSTATUS);
1732 bp = xdr_encode_u32(bp, 0); /* RPCFlags */
1733 bp = xdr_encode_u32(bp, op->nr_files);
1734 bp = xdr_encode_YFSFid(bp, &dvp->fid);
1735 bp = xdr_encode_YFSFid(bp, &vp->fid);
1736 for (i = 0; i < op->nr_files - 2; i++)
1737 bp = xdr_encode_YFSFid(bp, &op->more_files[i].fid);
1738 yfs_check_req(call, bp);
1739
1740 trace_afs_make_fs_call(call, &vp->fid);
1741 afs_make_op_call(op, call, GFP_NOFS);
1742 }
1743
1744 /*
1745 * Deliver reply data to an YFS.FetchOpaqueACL.
1746 */
yfs_deliver_fs_fetch_opaque_acl(struct afs_call * call)1747 static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call)
1748 {
1749 struct afs_operation *op = call->op;
1750 struct afs_vnode_param *vp = &op->file[0];
1751 struct yfs_acl *yacl = op->yacl;
1752 struct afs_acl *acl;
1753 const __be32 *bp;
1754 unsigned int size;
1755 int ret;
1756
1757 _enter("{%u}", call->unmarshall);
1758
1759 switch (call->unmarshall) {
1760 case 0:
1761 afs_extract_to_tmp(call);
1762 call->unmarshall++;
1763 fallthrough;
1764
1765 /* Extract the file ACL length */
1766 case 1:
1767 ret = afs_extract_data(call, true);
1768 if (ret < 0)
1769 return ret;
1770
1771 size = call->count2 = ntohl(call->tmp);
1772 size = round_up(size, 4);
1773
1774 if (yacl->flags & YFS_ACL_WANT_ACL) {
1775 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
1776 if (!acl)
1777 return -ENOMEM;
1778 yacl->acl = acl;
1779 acl->size = call->count2;
1780 afs_extract_begin(call, acl->data, size);
1781 } else {
1782 afs_extract_discard(call, size);
1783 }
1784 call->unmarshall++;
1785 fallthrough;
1786
1787 /* Extract the file ACL */
1788 case 2:
1789 ret = afs_extract_data(call, true);
1790 if (ret < 0)
1791 return ret;
1792
1793 afs_extract_to_tmp(call);
1794 call->unmarshall++;
1795 fallthrough;
1796
1797 /* Extract the volume ACL length */
1798 case 3:
1799 ret = afs_extract_data(call, true);
1800 if (ret < 0)
1801 return ret;
1802
1803 size = call->count2 = ntohl(call->tmp);
1804 size = round_up(size, 4);
1805
1806 if (yacl->flags & YFS_ACL_WANT_VOL_ACL) {
1807 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
1808 if (!acl)
1809 return -ENOMEM;
1810 yacl->vol_acl = acl;
1811 acl->size = call->count2;
1812 afs_extract_begin(call, acl->data, size);
1813 } else {
1814 afs_extract_discard(call, size);
1815 }
1816 call->unmarshall++;
1817 fallthrough;
1818
1819 /* Extract the volume ACL */
1820 case 4:
1821 ret = afs_extract_data(call, true);
1822 if (ret < 0)
1823 return ret;
1824
1825 afs_extract_to_buf(call,
1826 sizeof(__be32) * 2 +
1827 sizeof(struct yfs_xdr_YFSFetchStatus) +
1828 sizeof(struct yfs_xdr_YFSVolSync));
1829 call->unmarshall++;
1830 fallthrough;
1831
1832 /* extract the metadata */
1833 case 5:
1834 ret = afs_extract_data(call, false);
1835 if (ret < 0)
1836 return ret;
1837
1838 bp = call->buffer;
1839 yacl->inherit_flag = ntohl(*bp++);
1840 yacl->num_cleaned = ntohl(*bp++);
1841 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
1842 xdr_decode_YFSVolSync(&bp, &op->volsync);
1843
1844 call->unmarshall++;
1845 fallthrough;
1846
1847 case 6:
1848 break;
1849 }
1850
1851 _leave(" = 0 [done]");
1852 return 0;
1853 }
1854
yfs_free_opaque_acl(struct yfs_acl * yacl)1855 void yfs_free_opaque_acl(struct yfs_acl *yacl)
1856 {
1857 if (yacl) {
1858 kfree(yacl->acl);
1859 kfree(yacl->vol_acl);
1860 kfree(yacl);
1861 }
1862 }
1863
1864 /*
1865 * YFS.FetchOpaqueACL operation type
1866 */
1867 static const struct afs_call_type yfs_RXYFSFetchOpaqueACL = {
1868 .name = "YFS.FetchOpaqueACL",
1869 .op = yfs_FS_FetchOpaqueACL,
1870 .deliver = yfs_deliver_fs_fetch_opaque_acl,
1871 .destructor = afs_flat_call_destructor,
1872 };
1873
1874 /*
1875 * Fetch the YFS advanced ACLs for a file.
1876 */
yfs_fs_fetch_opaque_acl(struct afs_operation * op)1877 void yfs_fs_fetch_opaque_acl(struct afs_operation *op)
1878 {
1879 struct afs_vnode_param *vp = &op->file[0];
1880 struct afs_call *call;
1881 __be32 *bp;
1882
1883 _enter(",%x,{%llx:%llu},,",
1884 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1885
1886 call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchOpaqueACL,
1887 sizeof(__be32) * 2 +
1888 sizeof(struct yfs_xdr_YFSFid),
1889 sizeof(__be32) * 2 +
1890 sizeof(struct yfs_xdr_YFSFetchStatus) +
1891 sizeof(struct yfs_xdr_YFSVolSync));
1892 if (!call)
1893 return afs_op_nomem(op);
1894
1895 /* marshall the parameters */
1896 bp = call->request;
1897 bp = xdr_encode_u32(bp, YFSFETCHOPAQUEACL);
1898 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1899 bp = xdr_encode_YFSFid(bp, &vp->fid);
1900 yfs_check_req(call, bp);
1901
1902 trace_afs_make_fs_call(call, &vp->fid);
1903 afs_make_op_call(op, call, GFP_KERNEL);
1904 }
1905
1906 /*
1907 * YFS.StoreOpaqueACL2 operation type
1908 */
1909 static const struct afs_call_type yfs_RXYFSStoreOpaqueACL2 = {
1910 .name = "YFS.StoreOpaqueACL2",
1911 .op = yfs_FS_StoreOpaqueACL2,
1912 .deliver = yfs_deliver_status_and_volsync,
1913 .destructor = afs_flat_call_destructor,
1914 };
1915
1916 /*
1917 * Fetch the YFS ACL for a file.
1918 */
yfs_fs_store_opaque_acl2(struct afs_operation * op)1919 void yfs_fs_store_opaque_acl2(struct afs_operation *op)
1920 {
1921 struct afs_vnode_param *vp = &op->file[0];
1922 struct afs_call *call;
1923 struct afs_acl *acl = op->acl;
1924 size_t size;
1925 __be32 *bp;
1926
1927 _enter(",%x,{%llx:%llu},,",
1928 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1929
1930 size = round_up(acl->size, 4);
1931 call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreOpaqueACL2,
1932 sizeof(__be32) * 2 +
1933 sizeof(struct yfs_xdr_YFSFid) +
1934 sizeof(__be32) + size,
1935 sizeof(struct yfs_xdr_YFSFetchStatus) +
1936 sizeof(struct yfs_xdr_YFSVolSync));
1937 if (!call)
1938 return afs_op_nomem(op);
1939
1940 /* marshall the parameters */
1941 bp = call->request;
1942 bp = xdr_encode_u32(bp, YFSSTOREOPAQUEACL2);
1943 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1944 bp = xdr_encode_YFSFid(bp, &vp->fid);
1945 bp = xdr_encode_u32(bp, acl->size);
1946 memcpy(bp, acl->data, acl->size);
1947 if (acl->size != size)
1948 memset((void *)bp + acl->size, 0, size - acl->size);
1949 bp += size / sizeof(__be32);
1950 yfs_check_req(call, bp);
1951
1952 trace_afs_make_fs_call(call, &vp->fid);
1953 afs_make_op_call(op, call, GFP_KERNEL);
1954 }
1955