Commit | Line | Data |
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08e0e7c8 | 1 | /* AFS File Server client stubs |
1da177e4 | 2 | * |
08e0e7c8 | 3 | * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved. |
1da177e4 LT |
4 | * Written by David Howells (dhowells@redhat.com) |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #include <linux/init.h> | |
13 | #include <linux/sched.h> | |
08e0e7c8 | 14 | #include <linux/circ_buf.h> |
1da177e4 | 15 | #include "internal.h" |
08e0e7c8 | 16 | #include "afs_fs.h" |
1da177e4 | 17 | |
260a9803 DH |
18 | /* |
19 | * decode an AFSFid block | |
20 | */ | |
21 | static void xdr_decode_AFSFid(const __be32 **_bp, struct afs_fid *fid) | |
22 | { | |
23 | const __be32 *bp = *_bp; | |
24 | ||
25 | fid->vid = ntohl(*bp++); | |
26 | fid->vnode = ntohl(*bp++); | |
27 | fid->unique = ntohl(*bp++); | |
28 | *_bp = bp; | |
29 | } | |
30 | ||
1da177e4 | 31 | /* |
08e0e7c8 | 32 | * decode an AFSFetchStatus block |
1da177e4 | 33 | */ |
08e0e7c8 | 34 | static void xdr_decode_AFSFetchStatus(const __be32 **_bp, |
260a9803 | 35 | struct afs_file_status *status, |
31143d5d DH |
36 | struct afs_vnode *vnode, |
37 | afs_dataversion_t *store_version) | |
1da177e4 | 38 | { |
31143d5d | 39 | afs_dataversion_t expected_version; |
08e0e7c8 DH |
40 | const __be32 *bp = *_bp; |
41 | umode_t mode; | |
260a9803 | 42 | u64 data_version, size; |
08e0e7c8 DH |
43 | u32 changed = 0; /* becomes non-zero if ctime-type changes seen */ |
44 | ||
45 | #define EXTRACT(DST) \ | |
46 | do { \ | |
47 | u32 x = ntohl(*bp++); \ | |
48 | changed |= DST - x; \ | |
49 | DST = x; \ | |
50 | } while (0) | |
51 | ||
260a9803 DH |
52 | status->if_version = ntohl(*bp++); |
53 | EXTRACT(status->type); | |
54 | EXTRACT(status->nlink); | |
55 | size = ntohl(*bp++); | |
08e0e7c8 | 56 | data_version = ntohl(*bp++); |
260a9803 DH |
57 | EXTRACT(status->author); |
58 | EXTRACT(status->owner); | |
59 | EXTRACT(status->caller_access); /* call ticket dependent */ | |
60 | EXTRACT(status->anon_access); | |
61 | EXTRACT(status->mode); | |
62 | EXTRACT(status->parent.vnode); | |
63 | EXTRACT(status->parent.unique); | |
08e0e7c8 | 64 | bp++; /* seg size */ |
260a9803 DH |
65 | status->mtime_client = ntohl(*bp++); |
66 | status->mtime_server = ntohl(*bp++); | |
67 | EXTRACT(status->group); | |
08e0e7c8 DH |
68 | bp++; /* sync counter */ |
69 | data_version |= (u64) ntohl(*bp++) << 32; | |
260a9803 DH |
70 | bp++; /* lock count */ |
71 | size |= (u64) ntohl(*bp++) << 32; | |
72 | bp++; /* spare 4 */ | |
08e0e7c8 DH |
73 | *_bp = bp; |
74 | ||
260a9803 DH |
75 | if (size != status->size) { |
76 | status->size = size; | |
77 | changed |= true; | |
08e0e7c8 | 78 | } |
260a9803 | 79 | status->mode &= S_IALLUGO; |
08e0e7c8 DH |
80 | |
81 | _debug("vnode time %lx, %lx", | |
260a9803 DH |
82 | status->mtime_client, status->mtime_server); |
83 | ||
84 | if (vnode) { | |
85 | status->parent.vid = vnode->fid.vid; | |
86 | if (changed && !test_bit(AFS_VNODE_UNSET, &vnode->flags)) { | |
87 | _debug("vnode changed"); | |
88 | i_size_write(&vnode->vfs_inode, size); | |
89 | vnode->vfs_inode.i_uid = status->owner; | |
90 | vnode->vfs_inode.i_gid = status->group; | |
91 | vnode->vfs_inode.i_version = vnode->fid.unique; | |
92 | vnode->vfs_inode.i_nlink = status->nlink; | |
93 | ||
94 | mode = vnode->vfs_inode.i_mode; | |
95 | mode &= ~S_IALLUGO; | |
96 | mode |= status->mode; | |
97 | barrier(); | |
98 | vnode->vfs_inode.i_mode = mode; | |
99 | } | |
100 | ||
101 | vnode->vfs_inode.i_ctime.tv_sec = status->mtime_server; | |
102 | vnode->vfs_inode.i_mtime = vnode->vfs_inode.i_ctime; | |
103 | vnode->vfs_inode.i_atime = vnode->vfs_inode.i_ctime; | |
104 | } | |
105 | ||
31143d5d DH |
106 | expected_version = status->data_version; |
107 | if (store_version) | |
108 | expected_version = *store_version; | |
109 | ||
110 | if (expected_version != data_version) { | |
260a9803 DH |
111 | status->data_version = data_version; |
112 | if (vnode && !test_bit(AFS_VNODE_UNSET, &vnode->flags)) { | |
113 | _debug("vnode modified %llx on {%x:%u}", | |
ba3e0e1a DM |
114 | (unsigned long long) data_version, |
115 | vnode->fid.vid, vnode->fid.vnode); | |
260a9803 DH |
116 | set_bit(AFS_VNODE_MODIFIED, &vnode->flags); |
117 | set_bit(AFS_VNODE_ZAP_DATA, &vnode->flags); | |
118 | } | |
31143d5d DH |
119 | } else if (store_version) { |
120 | status->data_version = data_version; | |
1da177e4 | 121 | } |
ec26815a | 122 | } |
1da177e4 | 123 | |
1da177e4 | 124 | /* |
08e0e7c8 | 125 | * decode an AFSCallBack block |
1da177e4 | 126 | */ |
08e0e7c8 | 127 | static void xdr_decode_AFSCallBack(const __be32 **_bp, struct afs_vnode *vnode) |
1da177e4 | 128 | { |
08e0e7c8 | 129 | const __be32 *bp = *_bp; |
1da177e4 | 130 | |
08e0e7c8 DH |
131 | vnode->cb_version = ntohl(*bp++); |
132 | vnode->cb_expiry = ntohl(*bp++); | |
133 | vnode->cb_type = ntohl(*bp++); | |
134 | vnode->cb_expires = vnode->cb_expiry + get_seconds(); | |
135 | *_bp = bp; | |
ec26815a | 136 | } |
1da177e4 | 137 | |
260a9803 DH |
138 | static void xdr_decode_AFSCallBack_raw(const __be32 **_bp, |
139 | struct afs_callback *cb) | |
140 | { | |
141 | const __be32 *bp = *_bp; | |
142 | ||
143 | cb->version = ntohl(*bp++); | |
144 | cb->expiry = ntohl(*bp++); | |
145 | cb->type = ntohl(*bp++); | |
146 | *_bp = bp; | |
147 | } | |
148 | ||
1da177e4 | 149 | /* |
08e0e7c8 | 150 | * decode an AFSVolSync block |
1da177e4 | 151 | */ |
08e0e7c8 DH |
152 | static void xdr_decode_AFSVolSync(const __be32 **_bp, |
153 | struct afs_volsync *volsync) | |
1da177e4 | 154 | { |
08e0e7c8 | 155 | const __be32 *bp = *_bp; |
1da177e4 | 156 | |
08e0e7c8 DH |
157 | volsync->creation = ntohl(*bp++); |
158 | bp++; /* spare2 */ | |
159 | bp++; /* spare3 */ | |
160 | bp++; /* spare4 */ | |
161 | bp++; /* spare5 */ | |
162 | bp++; /* spare6 */ | |
163 | *_bp = bp; | |
164 | } | |
1da177e4 | 165 | |
31143d5d DH |
166 | /* |
167 | * encode the requested attributes into an AFSStoreStatus block | |
168 | */ | |
169 | static void xdr_encode_AFS_StoreStatus(__be32 **_bp, struct iattr *attr) | |
170 | { | |
171 | __be32 *bp = *_bp; | |
172 | u32 mask = 0, mtime = 0, owner = 0, group = 0, mode = 0; | |
173 | ||
174 | mask = 0; | |
175 | if (attr->ia_valid & ATTR_MTIME) { | |
176 | mask |= AFS_SET_MTIME; | |
177 | mtime = attr->ia_mtime.tv_sec; | |
178 | } | |
179 | ||
180 | if (attr->ia_valid & ATTR_UID) { | |
181 | mask |= AFS_SET_OWNER; | |
182 | owner = attr->ia_uid; | |
183 | } | |
184 | ||
185 | if (attr->ia_valid & ATTR_GID) { | |
186 | mask |= AFS_SET_GROUP; | |
187 | group = attr->ia_gid; | |
188 | } | |
189 | ||
190 | if (attr->ia_valid & ATTR_MODE) { | |
191 | mask |= AFS_SET_MODE; | |
192 | mode = attr->ia_mode & S_IALLUGO; | |
193 | } | |
194 | ||
195 | *bp++ = htonl(mask); | |
196 | *bp++ = htonl(mtime); | |
197 | *bp++ = htonl(owner); | |
198 | *bp++ = htonl(group); | |
199 | *bp++ = htonl(mode); | |
200 | *bp++ = 0; /* segment size */ | |
201 | *_bp = bp; | |
202 | } | |
203 | ||
08e0e7c8 DH |
204 | /* |
205 | * deliver reply data to an FS.FetchStatus | |
206 | */ | |
207 | static int afs_deliver_fs_fetch_status(struct afs_call *call, | |
208 | struct sk_buff *skb, bool last) | |
209 | { | |
260a9803 | 210 | struct afs_vnode *vnode = call->reply; |
08e0e7c8 | 211 | const __be32 *bp; |
1da177e4 | 212 | |
08e0e7c8 | 213 | _enter(",,%u", last); |
1da177e4 | 214 | |
08e0e7c8 DH |
215 | afs_transfer_reply(call, skb); |
216 | if (!last) | |
217 | return 0; | |
1da177e4 | 218 | |
08e0e7c8 DH |
219 | if (call->reply_size != call->reply_max) |
220 | return -EBADMSG; | |
1da177e4 | 221 | |
08e0e7c8 DH |
222 | /* unmarshall the reply once we've received all of it */ |
223 | bp = call->buffer; | |
31143d5d | 224 | xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL); |
260a9803 | 225 | xdr_decode_AFSCallBack(&bp, vnode); |
08e0e7c8 DH |
226 | if (call->reply2) |
227 | xdr_decode_AFSVolSync(&bp, call->reply2); | |
1da177e4 | 228 | |
08e0e7c8 DH |
229 | _leave(" = 0 [done]"); |
230 | return 0; | |
ec26815a | 231 | } |
08e0e7c8 DH |
232 | |
233 | /* | |
234 | * FS.FetchStatus operation type | |
235 | */ | |
236 | static const struct afs_call_type afs_RXFSFetchStatus = { | |
00d3b7a4 | 237 | .name = "FS.FetchStatus", |
08e0e7c8 DH |
238 | .deliver = afs_deliver_fs_fetch_status, |
239 | .abort_to_error = afs_abort_to_error, | |
240 | .destructor = afs_flat_call_destructor, | |
241 | }; | |
1da177e4 | 242 | |
1da177e4 LT |
243 | /* |
244 | * fetch the status information for a file | |
245 | */ | |
08e0e7c8 | 246 | int afs_fs_fetch_file_status(struct afs_server *server, |
00d3b7a4 | 247 | struct key *key, |
08e0e7c8 DH |
248 | struct afs_vnode *vnode, |
249 | struct afs_volsync *volsync, | |
250 | const struct afs_wait_mode *wait_mode) | |
1da177e4 | 251 | { |
08e0e7c8 | 252 | struct afs_call *call; |
1da177e4 LT |
253 | __be32 *bp; |
254 | ||
416351f2 | 255 | _enter(",%x,{%x:%u},,", |
260a9803 | 256 | key_serial(key), vnode->fid.vid, vnode->fid.vnode); |
1da177e4 | 257 | |
260a9803 | 258 | call = afs_alloc_flat_call(&afs_RXFSFetchStatus, 16, (21 + 3 + 6) * 4); |
08e0e7c8 DH |
259 | if (!call) |
260 | return -ENOMEM; | |
1da177e4 | 261 | |
00d3b7a4 | 262 | call->key = key; |
08e0e7c8 DH |
263 | call->reply = vnode; |
264 | call->reply2 = volsync; | |
265 | call->service_id = FS_SERVICE; | |
266 | call->port = htons(AFS_FS_PORT); | |
1da177e4 LT |
267 | |
268 | /* marshall the parameters */ | |
08e0e7c8 | 269 | bp = call->request; |
1da177e4 LT |
270 | bp[0] = htonl(FSFETCHSTATUS); |
271 | bp[1] = htonl(vnode->fid.vid); | |
272 | bp[2] = htonl(vnode->fid.vnode); | |
273 | bp[3] = htonl(vnode->fid.unique); | |
274 | ||
08e0e7c8 | 275 | return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); |
ec26815a | 276 | } |
1da177e4 | 277 | |
1da177e4 | 278 | /* |
08e0e7c8 | 279 | * deliver reply data to an FS.FetchData |
1da177e4 | 280 | */ |
08e0e7c8 DH |
281 | static int afs_deliver_fs_fetch_data(struct afs_call *call, |
282 | struct sk_buff *skb, bool last) | |
1da177e4 | 283 | { |
260a9803 | 284 | struct afs_vnode *vnode = call->reply; |
08e0e7c8 DH |
285 | const __be32 *bp; |
286 | struct page *page; | |
287 | void *buffer; | |
1da177e4 | 288 | int ret; |
1da177e4 | 289 | |
08e0e7c8 DH |
290 | _enter("{%u},{%u},%d", call->unmarshall, skb->len, last); |
291 | ||
292 | switch (call->unmarshall) { | |
293 | case 0: | |
294 | call->offset = 0; | |
295 | call->unmarshall++; | |
296 | ||
297 | /* extract the returned data length */ | |
298 | case 1: | |
299 | _debug("extract data length"); | |
300 | ret = afs_extract_data(call, skb, last, &call->tmp, 4); | |
301 | switch (ret) { | |
302 | case 0: break; | |
303 | case -EAGAIN: return 0; | |
304 | default: return ret; | |
305 | } | |
1da177e4 | 306 | |
08e0e7c8 DH |
307 | call->count = ntohl(call->tmp); |
308 | _debug("DATA length: %u", call->count); | |
309 | if (call->count > PAGE_SIZE) | |
310 | return -EBADMSG; | |
311 | call->offset = 0; | |
312 | call->unmarshall++; | |
313 | ||
08e0e7c8 DH |
314 | /* extract the returned data */ |
315 | case 2: | |
316 | _debug("extract data"); | |
416351f2 DH |
317 | if (call->count > 0) { |
318 | page = call->reply3; | |
319 | buffer = kmap_atomic(page, KM_USER0); | |
320 | ret = afs_extract_data(call, skb, last, buffer, | |
321 | call->count); | |
322 | kunmap_atomic(buffer, KM_USER0); | |
323 | switch (ret) { | |
324 | case 0: break; | |
325 | case -EAGAIN: return 0; | |
326 | default: return ret; | |
327 | } | |
08e0e7c8 | 328 | } |
1da177e4 | 329 | |
08e0e7c8 DH |
330 | call->offset = 0; |
331 | call->unmarshall++; | |
1da177e4 | 332 | |
08e0e7c8 DH |
333 | /* extract the metadata */ |
334 | case 3: | |
260a9803 DH |
335 | ret = afs_extract_data(call, skb, last, call->buffer, |
336 | (21 + 3 + 6) * 4); | |
08e0e7c8 DH |
337 | switch (ret) { |
338 | case 0: break; | |
339 | case -EAGAIN: return 0; | |
340 | default: return ret; | |
341 | } | |
342 | ||
343 | bp = call->buffer; | |
31143d5d | 344 | xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL); |
260a9803 | 345 | xdr_decode_AFSCallBack(&bp, vnode); |
08e0e7c8 DH |
346 | if (call->reply2) |
347 | xdr_decode_AFSVolSync(&bp, call->reply2); | |
348 | ||
349 | call->offset = 0; | |
350 | call->unmarshall++; | |
1da177e4 | 351 | |
08e0e7c8 DH |
352 | case 4: |
353 | _debug("trailer"); | |
354 | if (skb->len != 0) | |
355 | return -EBADMSG; | |
356 | break; | |
1da177e4 LT |
357 | } |
358 | ||
08e0e7c8 DH |
359 | if (!last) |
360 | return 0; | |
361 | ||
416351f2 DH |
362 | if (call->count < PAGE_SIZE) { |
363 | _debug("clear"); | |
364 | page = call->reply3; | |
365 | buffer = kmap_atomic(page, KM_USER0); | |
366 | memset(buffer + call->count, 0, PAGE_SIZE - call->count); | |
367 | kunmap_atomic(buffer, KM_USER0); | |
368 | } | |
369 | ||
08e0e7c8 DH |
370 | _leave(" = 0 [done]"); |
371 | return 0; | |
ec26815a | 372 | } |
1da177e4 | 373 | |
1da177e4 | 374 | /* |
08e0e7c8 | 375 | * FS.FetchData operation type |
1da177e4 | 376 | */ |
08e0e7c8 | 377 | static const struct afs_call_type afs_RXFSFetchData = { |
00d3b7a4 | 378 | .name = "FS.FetchData", |
08e0e7c8 DH |
379 | .deliver = afs_deliver_fs_fetch_data, |
380 | .abort_to_error = afs_abort_to_error, | |
381 | .destructor = afs_flat_call_destructor, | |
382 | }; | |
383 | ||
384 | /* | |
385 | * fetch data from a file | |
386 | */ | |
387 | int afs_fs_fetch_data(struct afs_server *server, | |
00d3b7a4 | 388 | struct key *key, |
08e0e7c8 DH |
389 | struct afs_vnode *vnode, |
390 | off_t offset, size_t length, | |
391 | struct page *buffer, | |
08e0e7c8 | 392 | const struct afs_wait_mode *wait_mode) |
1da177e4 | 393 | { |
08e0e7c8 | 394 | struct afs_call *call; |
1da177e4 LT |
395 | __be32 *bp; |
396 | ||
08e0e7c8 | 397 | _enter(""); |
1da177e4 | 398 | |
260a9803 | 399 | call = afs_alloc_flat_call(&afs_RXFSFetchData, 24, (21 + 3 + 6) * 4); |
08e0e7c8 DH |
400 | if (!call) |
401 | return -ENOMEM; | |
1da177e4 | 402 | |
00d3b7a4 | 403 | call->key = key; |
08e0e7c8 | 404 | call->reply = vnode; |
260a9803 | 405 | call->reply2 = NULL; /* volsync */ |
08e0e7c8 DH |
406 | call->reply3 = buffer; |
407 | call->service_id = FS_SERVICE; | |
408 | call->port = htons(AFS_FS_PORT); | |
1da177e4 LT |
409 | |
410 | /* marshall the parameters */ | |
08e0e7c8 DH |
411 | bp = call->request; |
412 | bp[0] = htonl(FSFETCHDATA); | |
413 | bp[1] = htonl(vnode->fid.vid); | |
414 | bp[2] = htonl(vnode->fid.vnode); | |
415 | bp[3] = htonl(vnode->fid.unique); | |
416 | bp[4] = htonl(offset); | |
417 | bp[5] = htonl(length); | |
1da177e4 | 418 | |
08e0e7c8 DH |
419 | return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); |
420 | } | |
1da177e4 | 421 | |
08e0e7c8 DH |
422 | /* |
423 | * deliver reply data to an FS.GiveUpCallBacks | |
424 | */ | |
425 | static int afs_deliver_fs_give_up_callbacks(struct afs_call *call, | |
426 | struct sk_buff *skb, bool last) | |
427 | { | |
428 | _enter(",{%u},%d", skb->len, last); | |
1da177e4 | 429 | |
08e0e7c8 DH |
430 | if (skb->len > 0) |
431 | return -EBADMSG; /* shouldn't be any reply data */ | |
432 | return 0; | |
ec26815a | 433 | } |
1da177e4 | 434 | |
1da177e4 | 435 | /* |
08e0e7c8 DH |
436 | * FS.GiveUpCallBacks operation type |
437 | */ | |
438 | static const struct afs_call_type afs_RXFSGiveUpCallBacks = { | |
00d3b7a4 | 439 | .name = "FS.GiveUpCallBacks", |
08e0e7c8 DH |
440 | .deliver = afs_deliver_fs_give_up_callbacks, |
441 | .abort_to_error = afs_abort_to_error, | |
442 | .destructor = afs_flat_call_destructor, | |
443 | }; | |
444 | ||
445 | /* | |
446 | * give up a set of callbacks | |
447 | * - the callbacks are held in the server->cb_break ring | |
1da177e4 | 448 | */ |
08e0e7c8 DH |
449 | int afs_fs_give_up_callbacks(struct afs_server *server, |
450 | const struct afs_wait_mode *wait_mode) | |
1da177e4 | 451 | { |
08e0e7c8 DH |
452 | struct afs_call *call; |
453 | size_t ncallbacks; | |
454 | __be32 *bp, *tp; | |
455 | int loop; | |
1da177e4 | 456 | |
08e0e7c8 DH |
457 | ncallbacks = CIRC_CNT(server->cb_break_head, server->cb_break_tail, |
458 | ARRAY_SIZE(server->cb_break)); | |
1da177e4 | 459 | |
08e0e7c8 | 460 | _enter("{%zu},", ncallbacks); |
1da177e4 | 461 | |
08e0e7c8 DH |
462 | if (ncallbacks == 0) |
463 | return 0; | |
464 | if (ncallbacks > AFSCBMAX) | |
465 | ncallbacks = AFSCBMAX; | |
1da177e4 | 466 | |
08e0e7c8 | 467 | _debug("break %zu callbacks", ncallbacks); |
1da177e4 | 468 | |
08e0e7c8 DH |
469 | call = afs_alloc_flat_call(&afs_RXFSGiveUpCallBacks, |
470 | 12 + ncallbacks * 6 * 4, 0); | |
471 | if (!call) | |
472 | return -ENOMEM; | |
473 | ||
474 | call->service_id = FS_SERVICE; | |
475 | call->port = htons(AFS_FS_PORT); | |
1da177e4 LT |
476 | |
477 | /* marshall the parameters */ | |
08e0e7c8 DH |
478 | bp = call->request; |
479 | tp = bp + 2 + ncallbacks * 3; | |
480 | *bp++ = htonl(FSGIVEUPCALLBACKS); | |
481 | *bp++ = htonl(ncallbacks); | |
482 | *tp++ = htonl(ncallbacks); | |
483 | ||
484 | atomic_sub(ncallbacks, &server->cb_break_n); | |
485 | for (loop = ncallbacks; loop > 0; loop--) { | |
486 | struct afs_callback *cb = | |
487 | &server->cb_break[server->cb_break_tail]; | |
488 | ||
489 | *bp++ = htonl(cb->fid.vid); | |
490 | *bp++ = htonl(cb->fid.vnode); | |
491 | *bp++ = htonl(cb->fid.unique); | |
492 | *tp++ = htonl(cb->version); | |
493 | *tp++ = htonl(cb->expiry); | |
494 | *tp++ = htonl(cb->type); | |
495 | smp_mb(); | |
496 | server->cb_break_tail = | |
497 | (server->cb_break_tail + 1) & | |
498 | (ARRAY_SIZE(server->cb_break) - 1); | |
1da177e4 LT |
499 | } |
500 | ||
08e0e7c8 DH |
501 | ASSERT(ncallbacks > 0); |
502 | wake_up_nr(&server->cb_break_waitq, ncallbacks); | |
1da177e4 | 503 | |
08e0e7c8 | 504 | return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); |
ec26815a | 505 | } |
260a9803 DH |
506 | |
507 | /* | |
508 | * deliver reply data to an FS.CreateFile or an FS.MakeDir | |
509 | */ | |
510 | static int afs_deliver_fs_create_vnode(struct afs_call *call, | |
511 | struct sk_buff *skb, bool last) | |
512 | { | |
513 | struct afs_vnode *vnode = call->reply; | |
514 | const __be32 *bp; | |
515 | ||
516 | _enter("{%u},{%u},%d", call->unmarshall, skb->len, last); | |
517 | ||
518 | afs_transfer_reply(call, skb); | |
519 | if (!last) | |
520 | return 0; | |
521 | ||
522 | if (call->reply_size != call->reply_max) | |
523 | return -EBADMSG; | |
524 | ||
525 | /* unmarshall the reply once we've received all of it */ | |
526 | bp = call->buffer; | |
527 | xdr_decode_AFSFid(&bp, call->reply2); | |
31143d5d DH |
528 | xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL, NULL); |
529 | xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL); | |
260a9803 DH |
530 | xdr_decode_AFSCallBack_raw(&bp, call->reply4); |
531 | /* xdr_decode_AFSVolSync(&bp, call->replyX); */ | |
532 | ||
533 | _leave(" = 0 [done]"); | |
534 | return 0; | |
535 | } | |
536 | ||
537 | /* | |
538 | * FS.CreateFile and FS.MakeDir operation type | |
539 | */ | |
540 | static const struct afs_call_type afs_RXFSCreateXXXX = { | |
541 | .name = "FS.CreateXXXX", | |
542 | .deliver = afs_deliver_fs_create_vnode, | |
543 | .abort_to_error = afs_abort_to_error, | |
544 | .destructor = afs_flat_call_destructor, | |
545 | }; | |
546 | ||
547 | /* | |
548 | * create a file or make a directory | |
549 | */ | |
550 | int afs_fs_create(struct afs_server *server, | |
551 | struct key *key, | |
552 | struct afs_vnode *vnode, | |
553 | const char *name, | |
554 | umode_t mode, | |
555 | struct afs_fid *newfid, | |
556 | struct afs_file_status *newstatus, | |
557 | struct afs_callback *newcb, | |
558 | const struct afs_wait_mode *wait_mode) | |
559 | { | |
560 | struct afs_call *call; | |
561 | size_t namesz, reqsz, padsz; | |
562 | __be32 *bp; | |
563 | ||
564 | _enter(""); | |
565 | ||
566 | namesz = strlen(name); | |
567 | padsz = (4 - (namesz & 3)) & 3; | |
568 | reqsz = (5 * 4) + namesz + padsz + (6 * 4); | |
569 | ||
570 | call = afs_alloc_flat_call(&afs_RXFSCreateXXXX, reqsz, | |
571 | (3 + 21 + 21 + 3 + 6) * 4); | |
572 | if (!call) | |
573 | return -ENOMEM; | |
574 | ||
575 | call->key = key; | |
576 | call->reply = vnode; | |
577 | call->reply2 = newfid; | |
578 | call->reply3 = newstatus; | |
579 | call->reply4 = newcb; | |
580 | call->service_id = FS_SERVICE; | |
581 | call->port = htons(AFS_FS_PORT); | |
582 | ||
583 | /* marshall the parameters */ | |
584 | bp = call->request; | |
585 | *bp++ = htonl(S_ISDIR(mode) ? FSMAKEDIR : FSCREATEFILE); | |
586 | *bp++ = htonl(vnode->fid.vid); | |
587 | *bp++ = htonl(vnode->fid.vnode); | |
588 | *bp++ = htonl(vnode->fid.unique); | |
589 | *bp++ = htonl(namesz); | |
590 | memcpy(bp, name, namesz); | |
591 | bp = (void *) bp + namesz; | |
592 | if (padsz > 0) { | |
593 | memset(bp, 0, padsz); | |
594 | bp = (void *) bp + padsz; | |
595 | } | |
596 | *bp++ = htonl(AFS_SET_MODE); | |
597 | *bp++ = 0; /* mtime */ | |
598 | *bp++ = 0; /* owner */ | |
599 | *bp++ = 0; /* group */ | |
600 | *bp++ = htonl(mode & S_IALLUGO); /* unix mode */ | |
601 | *bp++ = 0; /* segment size */ | |
602 | ||
603 | return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); | |
604 | } | |
605 | ||
606 | /* | |
607 | * deliver reply data to an FS.RemoveFile or FS.RemoveDir | |
608 | */ | |
609 | static int afs_deliver_fs_remove(struct afs_call *call, | |
610 | struct sk_buff *skb, bool last) | |
611 | { | |
612 | struct afs_vnode *vnode = call->reply; | |
613 | const __be32 *bp; | |
614 | ||
615 | _enter("{%u},{%u},%d", call->unmarshall, skb->len, last); | |
616 | ||
617 | afs_transfer_reply(call, skb); | |
618 | if (!last) | |
619 | return 0; | |
620 | ||
621 | if (call->reply_size != call->reply_max) | |
622 | return -EBADMSG; | |
623 | ||
624 | /* unmarshall the reply once we've received all of it */ | |
625 | bp = call->buffer; | |
31143d5d | 626 | xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL); |
260a9803 DH |
627 | /* xdr_decode_AFSVolSync(&bp, call->replyX); */ |
628 | ||
629 | _leave(" = 0 [done]"); | |
630 | return 0; | |
631 | } | |
632 | ||
633 | /* | |
634 | * FS.RemoveDir/FS.RemoveFile operation type | |
635 | */ | |
636 | static const struct afs_call_type afs_RXFSRemoveXXXX = { | |
637 | .name = "FS.RemoveXXXX", | |
638 | .deliver = afs_deliver_fs_remove, | |
639 | .abort_to_error = afs_abort_to_error, | |
640 | .destructor = afs_flat_call_destructor, | |
641 | }; | |
642 | ||
643 | /* | |
644 | * remove a file or directory | |
645 | */ | |
646 | int afs_fs_remove(struct afs_server *server, | |
647 | struct key *key, | |
648 | struct afs_vnode *vnode, | |
649 | const char *name, | |
650 | bool isdir, | |
651 | const struct afs_wait_mode *wait_mode) | |
652 | { | |
653 | struct afs_call *call; | |
654 | size_t namesz, reqsz, padsz; | |
655 | __be32 *bp; | |
656 | ||
657 | _enter(""); | |
658 | ||
659 | namesz = strlen(name); | |
660 | padsz = (4 - (namesz & 3)) & 3; | |
661 | reqsz = (5 * 4) + namesz + padsz; | |
662 | ||
663 | call = afs_alloc_flat_call(&afs_RXFSRemoveXXXX, reqsz, (21 + 6) * 4); | |
664 | if (!call) | |
665 | return -ENOMEM; | |
666 | ||
667 | call->key = key; | |
668 | call->reply = vnode; | |
669 | call->service_id = FS_SERVICE; | |
670 | call->port = htons(AFS_FS_PORT); | |
671 | ||
672 | /* marshall the parameters */ | |
673 | bp = call->request; | |
674 | *bp++ = htonl(isdir ? FSREMOVEDIR : FSREMOVEFILE); | |
675 | *bp++ = htonl(vnode->fid.vid); | |
676 | *bp++ = htonl(vnode->fid.vnode); | |
677 | *bp++ = htonl(vnode->fid.unique); | |
678 | *bp++ = htonl(namesz); | |
679 | memcpy(bp, name, namesz); | |
680 | bp = (void *) bp + namesz; | |
681 | if (padsz > 0) { | |
682 | memset(bp, 0, padsz); | |
683 | bp = (void *) bp + padsz; | |
684 | } | |
685 | ||
686 | return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); | |
687 | } | |
688 | ||
689 | /* | |
690 | * deliver reply data to an FS.Link | |
691 | */ | |
692 | static int afs_deliver_fs_link(struct afs_call *call, | |
693 | struct sk_buff *skb, bool last) | |
694 | { | |
695 | struct afs_vnode *dvnode = call->reply, *vnode = call->reply2; | |
696 | const __be32 *bp; | |
697 | ||
698 | _enter("{%u},{%u},%d", call->unmarshall, skb->len, last); | |
699 | ||
700 | afs_transfer_reply(call, skb); | |
701 | if (!last) | |
702 | return 0; | |
703 | ||
704 | if (call->reply_size != call->reply_max) | |
705 | return -EBADMSG; | |
706 | ||
707 | /* unmarshall the reply once we've received all of it */ | |
708 | bp = call->buffer; | |
31143d5d DH |
709 | xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL); |
710 | xdr_decode_AFSFetchStatus(&bp, &dvnode->status, dvnode, NULL); | |
260a9803 DH |
711 | /* xdr_decode_AFSVolSync(&bp, call->replyX); */ |
712 | ||
713 | _leave(" = 0 [done]"); | |
714 | return 0; | |
715 | } | |
716 | ||
717 | /* | |
718 | * FS.Link operation type | |
719 | */ | |
720 | static const struct afs_call_type afs_RXFSLink = { | |
721 | .name = "FS.Link", | |
722 | .deliver = afs_deliver_fs_link, | |
723 | .abort_to_error = afs_abort_to_error, | |
724 | .destructor = afs_flat_call_destructor, | |
725 | }; | |
726 | ||
727 | /* | |
728 | * make a hard link | |
729 | */ | |
730 | int afs_fs_link(struct afs_server *server, | |
731 | struct key *key, | |
732 | struct afs_vnode *dvnode, | |
733 | struct afs_vnode *vnode, | |
734 | const char *name, | |
735 | const struct afs_wait_mode *wait_mode) | |
736 | { | |
737 | struct afs_call *call; | |
738 | size_t namesz, reqsz, padsz; | |
739 | __be32 *bp; | |
740 | ||
741 | _enter(""); | |
742 | ||
743 | namesz = strlen(name); | |
744 | padsz = (4 - (namesz & 3)) & 3; | |
745 | reqsz = (5 * 4) + namesz + padsz + (3 * 4); | |
746 | ||
747 | call = afs_alloc_flat_call(&afs_RXFSLink, reqsz, (21 + 21 + 6) * 4); | |
748 | if (!call) | |
749 | return -ENOMEM; | |
750 | ||
751 | call->key = key; | |
752 | call->reply = dvnode; | |
753 | call->reply2 = vnode; | |
754 | call->service_id = FS_SERVICE; | |
755 | call->port = htons(AFS_FS_PORT); | |
756 | ||
757 | /* marshall the parameters */ | |
758 | bp = call->request; | |
759 | *bp++ = htonl(FSLINK); | |
760 | *bp++ = htonl(dvnode->fid.vid); | |
761 | *bp++ = htonl(dvnode->fid.vnode); | |
762 | *bp++ = htonl(dvnode->fid.unique); | |
763 | *bp++ = htonl(namesz); | |
764 | memcpy(bp, name, namesz); | |
765 | bp = (void *) bp + namesz; | |
766 | if (padsz > 0) { | |
767 | memset(bp, 0, padsz); | |
768 | bp = (void *) bp + padsz; | |
769 | } | |
770 | *bp++ = htonl(vnode->fid.vid); | |
771 | *bp++ = htonl(vnode->fid.vnode); | |
772 | *bp++ = htonl(vnode->fid.unique); | |
773 | ||
774 | return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); | |
775 | } | |
776 | ||
777 | /* | |
778 | * deliver reply data to an FS.Symlink | |
779 | */ | |
780 | static int afs_deliver_fs_symlink(struct afs_call *call, | |
781 | struct sk_buff *skb, bool last) | |
782 | { | |
783 | struct afs_vnode *vnode = call->reply; | |
784 | const __be32 *bp; | |
785 | ||
786 | _enter("{%u},{%u},%d", call->unmarshall, skb->len, last); | |
787 | ||
788 | afs_transfer_reply(call, skb); | |
789 | if (!last) | |
790 | return 0; | |
791 | ||
792 | if (call->reply_size != call->reply_max) | |
793 | return -EBADMSG; | |
794 | ||
795 | /* unmarshall the reply once we've received all of it */ | |
796 | bp = call->buffer; | |
797 | xdr_decode_AFSFid(&bp, call->reply2); | |
31143d5d DH |
798 | xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL, NULL); |
799 | xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL); | |
260a9803 DH |
800 | /* xdr_decode_AFSVolSync(&bp, call->replyX); */ |
801 | ||
802 | _leave(" = 0 [done]"); | |
803 | return 0; | |
804 | } | |
805 | ||
806 | /* | |
807 | * FS.Symlink operation type | |
808 | */ | |
809 | static const struct afs_call_type afs_RXFSSymlink = { | |
810 | .name = "FS.Symlink", | |
811 | .deliver = afs_deliver_fs_symlink, | |
812 | .abort_to_error = afs_abort_to_error, | |
813 | .destructor = afs_flat_call_destructor, | |
814 | }; | |
815 | ||
816 | /* | |
817 | * create a symbolic link | |
818 | */ | |
819 | int afs_fs_symlink(struct afs_server *server, | |
820 | struct key *key, | |
821 | struct afs_vnode *vnode, | |
822 | const char *name, | |
823 | const char *contents, | |
824 | struct afs_fid *newfid, | |
825 | struct afs_file_status *newstatus, | |
826 | const struct afs_wait_mode *wait_mode) | |
827 | { | |
828 | struct afs_call *call; | |
829 | size_t namesz, reqsz, padsz, c_namesz, c_padsz; | |
830 | __be32 *bp; | |
831 | ||
832 | _enter(""); | |
833 | ||
834 | namesz = strlen(name); | |
835 | padsz = (4 - (namesz & 3)) & 3; | |
836 | ||
837 | c_namesz = strlen(contents); | |
838 | c_padsz = (4 - (c_namesz & 3)) & 3; | |
839 | ||
840 | reqsz = (6 * 4) + namesz + padsz + c_namesz + c_padsz + (6 * 4); | |
841 | ||
842 | call = afs_alloc_flat_call(&afs_RXFSSymlink, reqsz, | |
843 | (3 + 21 + 21 + 6) * 4); | |
844 | if (!call) | |
845 | return -ENOMEM; | |
846 | ||
847 | call->key = key; | |
848 | call->reply = vnode; | |
849 | call->reply2 = newfid; | |
850 | call->reply3 = newstatus; | |
851 | call->service_id = FS_SERVICE; | |
852 | call->port = htons(AFS_FS_PORT); | |
853 | ||
854 | /* marshall the parameters */ | |
855 | bp = call->request; | |
856 | *bp++ = htonl(FSSYMLINK); | |
857 | *bp++ = htonl(vnode->fid.vid); | |
858 | *bp++ = htonl(vnode->fid.vnode); | |
859 | *bp++ = htonl(vnode->fid.unique); | |
860 | *bp++ = htonl(namesz); | |
861 | memcpy(bp, name, namesz); | |
862 | bp = (void *) bp + namesz; | |
863 | if (padsz > 0) { | |
864 | memset(bp, 0, padsz); | |
865 | bp = (void *) bp + padsz; | |
866 | } | |
867 | *bp++ = htonl(c_namesz); | |
868 | memcpy(bp, contents, c_namesz); | |
869 | bp = (void *) bp + c_namesz; | |
870 | if (c_padsz > 0) { | |
871 | memset(bp, 0, c_padsz); | |
872 | bp = (void *) bp + c_padsz; | |
873 | } | |
874 | *bp++ = htonl(AFS_SET_MODE); | |
875 | *bp++ = 0; /* mtime */ | |
876 | *bp++ = 0; /* owner */ | |
877 | *bp++ = 0; /* group */ | |
878 | *bp++ = htonl(S_IRWXUGO); /* unix mode */ | |
879 | *bp++ = 0; /* segment size */ | |
880 | ||
881 | return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); | |
882 | } | |
883 | ||
884 | /* | |
885 | * deliver reply data to an FS.Rename | |
886 | */ | |
887 | static int afs_deliver_fs_rename(struct afs_call *call, | |
888 | struct sk_buff *skb, bool last) | |
889 | { | |
890 | struct afs_vnode *orig_dvnode = call->reply, *new_dvnode = call->reply2; | |
891 | const __be32 *bp; | |
892 | ||
893 | _enter("{%u},{%u},%d", call->unmarshall, skb->len, last); | |
894 | ||
895 | afs_transfer_reply(call, skb); | |
896 | if (!last) | |
897 | return 0; | |
898 | ||
899 | if (call->reply_size != call->reply_max) | |
900 | return -EBADMSG; | |
901 | ||
902 | /* unmarshall the reply once we've received all of it */ | |
903 | bp = call->buffer; | |
31143d5d | 904 | xdr_decode_AFSFetchStatus(&bp, &orig_dvnode->status, orig_dvnode, NULL); |
260a9803 | 905 | if (new_dvnode != orig_dvnode) |
31143d5d DH |
906 | xdr_decode_AFSFetchStatus(&bp, &new_dvnode->status, new_dvnode, |
907 | NULL); | |
260a9803 DH |
908 | /* xdr_decode_AFSVolSync(&bp, call->replyX); */ |
909 | ||
910 | _leave(" = 0 [done]"); | |
911 | return 0; | |
912 | } | |
913 | ||
914 | /* | |
915 | * FS.Rename operation type | |
916 | */ | |
917 | static const struct afs_call_type afs_RXFSRename = { | |
918 | .name = "FS.Rename", | |
919 | .deliver = afs_deliver_fs_rename, | |
920 | .abort_to_error = afs_abort_to_error, | |
921 | .destructor = afs_flat_call_destructor, | |
922 | }; | |
923 | ||
924 | /* | |
925 | * create a symbolic link | |
926 | */ | |
927 | int afs_fs_rename(struct afs_server *server, | |
928 | struct key *key, | |
929 | struct afs_vnode *orig_dvnode, | |
930 | const char *orig_name, | |
931 | struct afs_vnode *new_dvnode, | |
932 | const char *new_name, | |
933 | const struct afs_wait_mode *wait_mode) | |
934 | { | |
935 | struct afs_call *call; | |
936 | size_t reqsz, o_namesz, o_padsz, n_namesz, n_padsz; | |
937 | __be32 *bp; | |
938 | ||
939 | _enter(""); | |
940 | ||
941 | o_namesz = strlen(orig_name); | |
942 | o_padsz = (4 - (o_namesz & 3)) & 3; | |
943 | ||
944 | n_namesz = strlen(new_name); | |
945 | n_padsz = (4 - (n_namesz & 3)) & 3; | |
946 | ||
947 | reqsz = (4 * 4) + | |
948 | 4 + o_namesz + o_padsz + | |
949 | (3 * 4) + | |
950 | 4 + n_namesz + n_padsz; | |
951 | ||
952 | call = afs_alloc_flat_call(&afs_RXFSRename, reqsz, (21 + 21 + 6) * 4); | |
953 | if (!call) | |
954 | return -ENOMEM; | |
955 | ||
956 | call->key = key; | |
957 | call->reply = orig_dvnode; | |
958 | call->reply2 = new_dvnode; | |
959 | call->service_id = FS_SERVICE; | |
960 | call->port = htons(AFS_FS_PORT); | |
961 | ||
962 | /* marshall the parameters */ | |
963 | bp = call->request; | |
964 | *bp++ = htonl(FSRENAME); | |
965 | *bp++ = htonl(orig_dvnode->fid.vid); | |
966 | *bp++ = htonl(orig_dvnode->fid.vnode); | |
967 | *bp++ = htonl(orig_dvnode->fid.unique); | |
968 | *bp++ = htonl(o_namesz); | |
969 | memcpy(bp, orig_name, o_namesz); | |
970 | bp = (void *) bp + o_namesz; | |
971 | if (o_padsz > 0) { | |
972 | memset(bp, 0, o_padsz); | |
973 | bp = (void *) bp + o_padsz; | |
974 | } | |
975 | ||
976 | *bp++ = htonl(new_dvnode->fid.vid); | |
977 | *bp++ = htonl(new_dvnode->fid.vnode); | |
978 | *bp++ = htonl(new_dvnode->fid.unique); | |
979 | *bp++ = htonl(n_namesz); | |
980 | memcpy(bp, new_name, n_namesz); | |
981 | bp = (void *) bp + n_namesz; | |
982 | if (n_padsz > 0) { | |
983 | memset(bp, 0, n_padsz); | |
984 | bp = (void *) bp + n_padsz; | |
985 | } | |
986 | ||
987 | return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); | |
988 | } | |
31143d5d DH |
989 | |
990 | /* | |
991 | * deliver reply data to an FS.StoreData | |
992 | */ | |
993 | static int afs_deliver_fs_store_data(struct afs_call *call, | |
994 | struct sk_buff *skb, bool last) | |
995 | { | |
996 | struct afs_vnode *vnode = call->reply; | |
997 | const __be32 *bp; | |
998 | ||
999 | _enter(",,%u", last); | |
1000 | ||
1001 | afs_transfer_reply(call, skb); | |
1002 | if (!last) { | |
1003 | _leave(" = 0 [more]"); | |
1004 | return 0; | |
1005 | } | |
1006 | ||
1007 | if (call->reply_size != call->reply_max) { | |
1008 | _leave(" = -EBADMSG [%u != %u]", | |
1009 | call->reply_size, call->reply_max); | |
1010 | return -EBADMSG; | |
1011 | } | |
1012 | ||
1013 | /* unmarshall the reply once we've received all of it */ | |
1014 | bp = call->buffer; | |
1015 | xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, | |
1016 | &call->store_version); | |
1017 | /* xdr_decode_AFSVolSync(&bp, call->replyX); */ | |
1018 | ||
1019 | afs_pages_written_back(vnode, call); | |
1020 | ||
1021 | _leave(" = 0 [done]"); | |
1022 | return 0; | |
1023 | } | |
1024 | ||
1025 | /* | |
1026 | * FS.StoreData operation type | |
1027 | */ | |
1028 | static const struct afs_call_type afs_RXFSStoreData = { | |
1029 | .name = "FS.StoreData", | |
1030 | .deliver = afs_deliver_fs_store_data, | |
1031 | .abort_to_error = afs_abort_to_error, | |
1032 | .destructor = afs_flat_call_destructor, | |
1033 | }; | |
1034 | ||
1035 | /* | |
1036 | * store a set of pages | |
1037 | */ | |
1038 | int afs_fs_store_data(struct afs_server *server, struct afs_writeback *wb, | |
1039 | pgoff_t first, pgoff_t last, | |
1040 | unsigned offset, unsigned to, | |
1041 | const struct afs_wait_mode *wait_mode) | |
1042 | { | |
1043 | struct afs_vnode *vnode = wb->vnode; | |
1044 | struct afs_call *call; | |
1045 | loff_t size, pos, i_size; | |
1046 | __be32 *bp; | |
1047 | ||
1048 | _enter(",%x,{%x:%u},,", | |
1049 | key_serial(wb->key), vnode->fid.vid, vnode->fid.vnode); | |
1050 | ||
1051 | size = to - offset; | |
1052 | if (first != last) | |
1053 | size += (loff_t)(last - first) << PAGE_SHIFT; | |
1054 | pos = (loff_t)first << PAGE_SHIFT; | |
1055 | pos += offset; | |
1056 | ||
1057 | i_size = i_size_read(&vnode->vfs_inode); | |
1058 | if (pos + size > i_size) | |
1059 | i_size = size + pos; | |
1060 | ||
1061 | _debug("size %llx, at %llx, i_size %llx", | |
1062 | (unsigned long long) size, (unsigned long long) pos, | |
1063 | (unsigned long long) i_size); | |
1064 | ||
1065 | BUG_ON(i_size > 0xffffffff); // TODO: use 64-bit store | |
1066 | ||
1067 | call = afs_alloc_flat_call(&afs_RXFSStoreData, | |
1068 | (4 + 6 + 3) * 4, | |
1069 | (21 + 6) * 4); | |
1070 | if (!call) | |
1071 | return -ENOMEM; | |
1072 | ||
1073 | call->wb = wb; | |
1074 | call->key = wb->key; | |
1075 | call->reply = vnode; | |
1076 | call->service_id = FS_SERVICE; | |
1077 | call->port = htons(AFS_FS_PORT); | |
1078 | call->mapping = vnode->vfs_inode.i_mapping; | |
1079 | call->first = first; | |
1080 | call->last = last; | |
1081 | call->first_offset = offset; | |
1082 | call->last_to = to; | |
1083 | call->send_pages = true; | |
1084 | call->store_version = vnode->status.data_version + 1; | |
1085 | ||
1086 | /* marshall the parameters */ | |
1087 | bp = call->request; | |
1088 | *bp++ = htonl(FSSTOREDATA); | |
1089 | *bp++ = htonl(vnode->fid.vid); | |
1090 | *bp++ = htonl(vnode->fid.vnode); | |
1091 | *bp++ = htonl(vnode->fid.unique); | |
1092 | ||
1093 | *bp++ = 0; /* mask */ | |
1094 | *bp++ = 0; /* mtime */ | |
1095 | *bp++ = 0; /* owner */ | |
1096 | *bp++ = 0; /* group */ | |
1097 | *bp++ = 0; /* unix mode */ | |
1098 | *bp++ = 0; /* segment size */ | |
1099 | ||
1100 | *bp++ = htonl(pos); | |
1101 | *bp++ = htonl(size); | |
1102 | *bp++ = htonl(i_size); | |
1103 | ||
1104 | return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); | |
1105 | } | |
1106 | ||
1107 | /* | |
1108 | * deliver reply data to an FS.StoreStatus | |
1109 | */ | |
1110 | static int afs_deliver_fs_store_status(struct afs_call *call, | |
1111 | struct sk_buff *skb, bool last) | |
1112 | { | |
1113 | afs_dataversion_t *store_version; | |
1114 | struct afs_vnode *vnode = call->reply; | |
1115 | const __be32 *bp; | |
1116 | ||
1117 | _enter(",,%u", last); | |
1118 | ||
1119 | afs_transfer_reply(call, skb); | |
1120 | if (!last) { | |
1121 | _leave(" = 0 [more]"); | |
1122 | return 0; | |
1123 | } | |
1124 | ||
1125 | if (call->reply_size != call->reply_max) { | |
1126 | _leave(" = -EBADMSG [%u != %u]", | |
1127 | call->reply_size, call->reply_max); | |
1128 | return -EBADMSG; | |
1129 | } | |
1130 | ||
1131 | /* unmarshall the reply once we've received all of it */ | |
1132 | store_version = NULL; | |
1133 | if (call->operation_ID == FSSTOREDATA) | |
1134 | store_version = &call->store_version; | |
1135 | ||
1136 | bp = call->buffer; | |
1137 | xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, store_version); | |
1138 | /* xdr_decode_AFSVolSync(&bp, call->replyX); */ | |
1139 | ||
1140 | _leave(" = 0 [done]"); | |
1141 | return 0; | |
1142 | } | |
1143 | ||
1144 | /* | |
1145 | * FS.StoreStatus operation type | |
1146 | */ | |
1147 | static const struct afs_call_type afs_RXFSStoreStatus = { | |
1148 | .name = "FS.StoreStatus", | |
1149 | .deliver = afs_deliver_fs_store_status, | |
1150 | .abort_to_error = afs_abort_to_error, | |
1151 | .destructor = afs_flat_call_destructor, | |
1152 | }; | |
1153 | ||
1154 | static const struct afs_call_type afs_RXFSStoreData_as_Status = { | |
1155 | .name = "FS.StoreData", | |
1156 | .deliver = afs_deliver_fs_store_status, | |
1157 | .abort_to_error = afs_abort_to_error, | |
1158 | .destructor = afs_flat_call_destructor, | |
1159 | }; | |
1160 | ||
1161 | /* | |
1162 | * set the attributes on a file, using FS.StoreData rather than FS.StoreStatus | |
1163 | * so as to alter the file size also | |
1164 | */ | |
1165 | static int afs_fs_setattr_size(struct afs_server *server, struct key *key, | |
1166 | struct afs_vnode *vnode, struct iattr *attr, | |
1167 | const struct afs_wait_mode *wait_mode) | |
1168 | { | |
1169 | struct afs_call *call; | |
1170 | __be32 *bp; | |
1171 | ||
1172 | _enter(",%x,{%x:%u},,", | |
1173 | key_serial(key), vnode->fid.vid, vnode->fid.vnode); | |
1174 | ||
1175 | ASSERT(attr->ia_valid & ATTR_SIZE); | |
1176 | ASSERTCMP(attr->ia_size, <=, 0xffffffff); // TODO: use 64-bit store | |
1177 | ||
1178 | call = afs_alloc_flat_call(&afs_RXFSStoreData_as_Status, | |
1179 | (4 + 6 + 3) * 4, | |
1180 | (21 + 6) * 4); | |
1181 | if (!call) | |
1182 | return -ENOMEM; | |
1183 | ||
1184 | call->key = key; | |
1185 | call->reply = vnode; | |
1186 | call->service_id = FS_SERVICE; | |
1187 | call->port = htons(AFS_FS_PORT); | |
1188 | call->store_version = vnode->status.data_version + 1; | |
1189 | call->operation_ID = FSSTOREDATA; | |
1190 | ||
1191 | /* marshall the parameters */ | |
1192 | bp = call->request; | |
1193 | *bp++ = htonl(FSSTOREDATA); | |
1194 | *bp++ = htonl(vnode->fid.vid); | |
1195 | *bp++ = htonl(vnode->fid.vnode); | |
1196 | *bp++ = htonl(vnode->fid.unique); | |
1197 | ||
1198 | xdr_encode_AFS_StoreStatus(&bp, attr); | |
1199 | ||
1200 | *bp++ = 0; /* position of start of write */ | |
1201 | *bp++ = 0; /* size of write */ | |
1202 | *bp++ = htonl(attr->ia_size); /* new file length */ | |
1203 | ||
1204 | return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); | |
1205 | } | |
1206 | ||
1207 | /* | |
1208 | * set the attributes on a file, using FS.StoreData if there's a change in file | |
1209 | * size, and FS.StoreStatus otherwise | |
1210 | */ | |
1211 | int afs_fs_setattr(struct afs_server *server, struct key *key, | |
1212 | struct afs_vnode *vnode, struct iattr *attr, | |
1213 | const struct afs_wait_mode *wait_mode) | |
1214 | { | |
1215 | struct afs_call *call; | |
1216 | __be32 *bp; | |
1217 | ||
1218 | if (attr->ia_valid & ATTR_SIZE) | |
1219 | return afs_fs_setattr_size(server, key, vnode, attr, | |
1220 | wait_mode); | |
1221 | ||
1222 | _enter(",%x,{%x:%u},,", | |
1223 | key_serial(key), vnode->fid.vid, vnode->fid.vnode); | |
1224 | ||
1225 | call = afs_alloc_flat_call(&afs_RXFSStoreStatus, | |
1226 | (4 + 6) * 4, | |
1227 | (21 + 6) * 4); | |
1228 | if (!call) | |
1229 | return -ENOMEM; | |
1230 | ||
1231 | call->key = key; | |
1232 | call->reply = vnode; | |
1233 | call->service_id = FS_SERVICE; | |
1234 | call->port = htons(AFS_FS_PORT); | |
1235 | call->operation_ID = FSSTORESTATUS; | |
1236 | ||
1237 | /* marshall the parameters */ | |
1238 | bp = call->request; | |
1239 | *bp++ = htonl(FSSTORESTATUS); | |
1240 | *bp++ = htonl(vnode->fid.vid); | |
1241 | *bp++ = htonl(vnode->fid.vnode); | |
1242 | *bp++ = htonl(vnode->fid.unique); | |
1243 | ||
1244 | xdr_encode_AFS_StoreStatus(&bp, attr); | |
1245 | ||
1246 | return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); | |
1247 | } |