1 /* AFS File Server client stubs
3 * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
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.
12 #include <linux/init.h>
13 #include <linux/slab.h>
14 #include <linux/sched.h>
15 #include <linux/circ_buf.h>
20 * We need somewhere to discard into in case the server helpfully returns more
21 * than we asked for in FS.FetchData{,64}.
23 static u8 afs_discard_buffer[64];
26 * decode an AFSFid block
28 static void xdr_decode_AFSFid(const __be32 **_bp, struct afs_fid *fid)
30 const __be32 *bp = *_bp;
32 fid->vid = ntohl(*bp++);
33 fid->vnode = ntohl(*bp++);
34 fid->unique = ntohl(*bp++);
39 * decode an AFSFetchStatus block
41 static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
42 struct afs_file_status *status,
43 struct afs_vnode *vnode,
44 afs_dataversion_t *store_version)
46 afs_dataversion_t expected_version;
47 const __be32 *bp = *_bp;
49 u64 data_version, size;
50 u32 changed = 0; /* becomes non-zero if ctime-type changes seen */
54 #define EXTRACT(DST) \
56 u32 x = ntohl(*bp++); \
61 status->if_version = ntohl(*bp++);
62 EXTRACT(status->type);
63 EXTRACT(status->nlink);
65 data_version = ntohl(*bp++);
66 EXTRACT(status->author);
67 owner = make_kuid(&init_user_ns, ntohl(*bp++));
68 changed |= !uid_eq(owner, status->owner);
69 status->owner = owner;
70 EXTRACT(status->caller_access); /* call ticket dependent */
71 EXTRACT(status->anon_access);
72 EXTRACT(status->mode);
73 EXTRACT(status->parent.vnode);
74 EXTRACT(status->parent.unique);
76 status->mtime_client = ntohl(*bp++);
77 status->mtime_server = ntohl(*bp++);
78 group = make_kgid(&init_user_ns, ntohl(*bp++));
79 changed |= !gid_eq(group, status->group);
80 status->group = group;
81 bp++; /* sync counter */
82 data_version |= (u64) ntohl(*bp++) << 32;
83 EXTRACT(status->lock_count);
84 size |= (u64) ntohl(*bp++) << 32;
88 if (size != status->size) {
92 status->mode &= S_IALLUGO;
94 _debug("vnode time %lx, %lx",
95 status->mtime_client, status->mtime_server);
98 status->parent.vid = vnode->fid.vid;
99 if (changed && !test_bit(AFS_VNODE_UNSET, &vnode->flags)) {
100 _debug("vnode changed");
101 i_size_write(&vnode->vfs_inode, size);
102 vnode->vfs_inode.i_uid = status->owner;
103 vnode->vfs_inode.i_gid = status->group;
104 vnode->vfs_inode.i_generation = vnode->fid.unique;
105 set_nlink(&vnode->vfs_inode, status->nlink);
107 mode = vnode->vfs_inode.i_mode;
109 mode |= status->mode;
111 vnode->vfs_inode.i_mode = mode;
114 vnode->vfs_inode.i_ctime.tv_sec = status->mtime_client;
115 vnode->vfs_inode.i_mtime = vnode->vfs_inode.i_ctime;
116 vnode->vfs_inode.i_atime = vnode->vfs_inode.i_ctime;
117 vnode->vfs_inode.i_version = data_version;
120 expected_version = status->data_version;
122 expected_version = *store_version;
124 if (expected_version != data_version) {
125 status->data_version = data_version;
126 if (vnode && !test_bit(AFS_VNODE_UNSET, &vnode->flags)) {
127 _debug("vnode modified %llx on {%x:%u}",
128 (unsigned long long) data_version,
129 vnode->fid.vid, vnode->fid.vnode);
130 set_bit(AFS_VNODE_MODIFIED, &vnode->flags);
131 set_bit(AFS_VNODE_ZAP_DATA, &vnode->flags);
133 } else if (store_version) {
134 status->data_version = data_version;
139 * decode an AFSCallBack block
141 static void xdr_decode_AFSCallBack(const __be32 **_bp, struct afs_vnode *vnode)
143 const __be32 *bp = *_bp;
145 vnode->cb_version = ntohl(*bp++);
146 vnode->cb_expiry = ntohl(*bp++);
147 vnode->cb_type = ntohl(*bp++);
148 vnode->cb_expires = vnode->cb_expiry + ktime_get_real_seconds();
152 static void xdr_decode_AFSCallBack_raw(const __be32 **_bp,
153 struct afs_callback *cb)
155 const __be32 *bp = *_bp;
157 cb->version = ntohl(*bp++);
158 cb->expiry = ntohl(*bp++);
159 cb->type = ntohl(*bp++);
164 * decode an AFSVolSync block
166 static void xdr_decode_AFSVolSync(const __be32 **_bp,
167 struct afs_volsync *volsync)
169 const __be32 *bp = *_bp;
171 volsync->creation = ntohl(*bp++);
181 * encode the requested attributes into an AFSStoreStatus block
183 static void xdr_encode_AFS_StoreStatus(__be32 **_bp, struct iattr *attr)
186 u32 mask = 0, mtime = 0, owner = 0, group = 0, mode = 0;
189 if (attr->ia_valid & ATTR_MTIME) {
190 mask |= AFS_SET_MTIME;
191 mtime = attr->ia_mtime.tv_sec;
194 if (attr->ia_valid & ATTR_UID) {
195 mask |= AFS_SET_OWNER;
196 owner = from_kuid(&init_user_ns, attr->ia_uid);
199 if (attr->ia_valid & ATTR_GID) {
200 mask |= AFS_SET_GROUP;
201 group = from_kgid(&init_user_ns, attr->ia_gid);
204 if (attr->ia_valid & ATTR_MODE) {
205 mask |= AFS_SET_MODE;
206 mode = attr->ia_mode & S_IALLUGO;
210 *bp++ = htonl(mtime);
211 *bp++ = htonl(owner);
212 *bp++ = htonl(group);
214 *bp++ = 0; /* segment size */
219 * decode an AFSFetchVolumeStatus block
221 static void xdr_decode_AFSFetchVolumeStatus(const __be32 **_bp,
222 struct afs_volume_status *vs)
224 const __be32 *bp = *_bp;
226 vs->vid = ntohl(*bp++);
227 vs->parent_id = ntohl(*bp++);
228 vs->online = ntohl(*bp++);
229 vs->in_service = ntohl(*bp++);
230 vs->blessed = ntohl(*bp++);
231 vs->needs_salvage = ntohl(*bp++);
232 vs->type = ntohl(*bp++);
233 vs->min_quota = ntohl(*bp++);
234 vs->max_quota = ntohl(*bp++);
235 vs->blocks_in_use = ntohl(*bp++);
236 vs->part_blocks_avail = ntohl(*bp++);
237 vs->part_max_blocks = ntohl(*bp++);
242 * deliver reply data to an FS.FetchStatus
244 static int afs_deliver_fs_fetch_status(struct afs_call *call)
246 struct afs_vnode *vnode = call->reply;
252 ret = afs_transfer_reply(call);
256 /* unmarshall the reply once we've received all of it */
258 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
259 xdr_decode_AFSCallBack(&bp, vnode);
261 xdr_decode_AFSVolSync(&bp, call->reply2);
263 _leave(" = 0 [done]");
268 * FS.FetchStatus operation type
270 static const struct afs_call_type afs_RXFSFetchStatus = {
271 .name = "FS.FetchStatus",
272 .deliver = afs_deliver_fs_fetch_status,
273 .abort_to_error = afs_abort_to_error,
274 .destructor = afs_flat_call_destructor,
278 * fetch the status information for a file
280 int afs_fs_fetch_file_status(struct afs_server *server,
282 struct afs_vnode *vnode,
283 struct afs_volsync *volsync,
286 struct afs_call *call;
289 _enter(",%x,{%x:%u},,",
290 key_serial(key), vnode->fid.vid, vnode->fid.vnode);
292 call = afs_alloc_flat_call(&afs_RXFSFetchStatus, 16, (21 + 3 + 6) * 4);
298 call->reply2 = volsync;
299 call->service_id = FS_SERVICE;
300 call->port = htons(AFS_FS_PORT);
302 /* marshall the parameters */
304 bp[0] = htonl(FSFETCHSTATUS);
305 bp[1] = htonl(vnode->fid.vid);
306 bp[2] = htonl(vnode->fid.vnode);
307 bp[3] = htonl(vnode->fid.unique);
309 return afs_make_call(&server->addr, call, GFP_NOFS, async);
313 * deliver reply data to an FS.FetchData
315 static int afs_deliver_fs_fetch_data(struct afs_call *call)
317 struct afs_vnode *vnode = call->reply;
318 struct afs_read *req = call->reply3;
324 _enter("{%u,%zu/%u;%llu/%llu}",
325 call->unmarshall, call->offset, call->count,
326 req->remain, req->actual_len);
328 switch (call->unmarshall) {
333 if (call->operation_ID != FSFETCHDATA64) {
338 /* extract the upper part of the returned data length of an
339 * FSFETCHDATA64 op (which should always be 0 using this
342 _debug("extract data length (MSW)");
343 ret = afs_extract_data(call, &call->tmp, 4, true);
347 req->actual_len = ntohl(call->tmp);
348 req->actual_len <<= 32;
353 /* extract the returned data length */
355 _debug("extract data length");
356 ret = afs_extract_data(call, &call->tmp, 4, true);
360 req->actual_len |= ntohl(call->tmp);
361 _debug("DATA length: %llu", req->actual_len);
363 req->remain = req->actual_len;
364 call->offset = req->pos & (PAGE_SIZE - 1);
366 if (req->actual_len == 0)
371 ASSERTCMP(req->index, <, req->nr_pages);
372 if (req->remain > PAGE_SIZE - call->offset)
373 size = PAGE_SIZE - call->offset;
376 call->count = call->offset + size;
377 ASSERTCMP(call->count, <=, PAGE_SIZE);
380 /* extract the returned data */
382 _debug("extract data %llu/%llu %zu/%u",
383 req->remain, req->actual_len, call->offset, call->count);
385 buffer = kmap(req->pages[req->index]);
386 ret = afs_extract_data(call, buffer, call->count, true);
387 kunmap(req->pages[req->index]);
390 if (call->offset == PAGE_SIZE) {
392 req->page_done(call, req);
394 if (req->remain > 0) {
396 if (req->index >= req->nr_pages) {
397 call->unmarshall = 4;
405 /* Discard any excess data the server gave us */
408 size = min_t(loff_t, sizeof(afs_discard_buffer), req->remain);
410 _debug("extract discard %llu/%llu %zu/%u",
411 req->remain, req->actual_len, call->offset, call->count);
414 ret = afs_extract_data(call, afs_discard_buffer, call->count, true);
415 req->remain -= call->offset;
423 call->unmarshall = 5;
425 /* extract the metadata */
427 ret = afs_extract_data(call, call->buffer,
428 (21 + 3 + 6) * 4, false);
433 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
434 xdr_decode_AFSCallBack(&bp, vnode);
436 xdr_decode_AFSVolSync(&bp, call->reply2);
445 for (; req->index < req->nr_pages; req->index++) {
446 if (call->count < PAGE_SIZE)
447 zero_user_segment(req->pages[req->index],
448 call->count, PAGE_SIZE);
450 req->page_done(call, req);
454 _leave(" = 0 [done]");
458 static void afs_fetch_data_destructor(struct afs_call *call)
460 struct afs_read *req = call->reply3;
463 afs_flat_call_destructor(call);
467 * FS.FetchData operation type
469 static const struct afs_call_type afs_RXFSFetchData = {
470 .name = "FS.FetchData",
471 .deliver = afs_deliver_fs_fetch_data,
472 .abort_to_error = afs_abort_to_error,
473 .destructor = afs_fetch_data_destructor,
476 static const struct afs_call_type afs_RXFSFetchData64 = {
477 .name = "FS.FetchData64",
478 .deliver = afs_deliver_fs_fetch_data,
479 .abort_to_error = afs_abort_to_error,
480 .destructor = afs_fetch_data_destructor,
484 * fetch data from a very large file
486 static int afs_fs_fetch_data64(struct afs_server *server,
488 struct afs_vnode *vnode,
489 struct afs_read *req,
492 struct afs_call *call;
497 call = afs_alloc_flat_call(&afs_RXFSFetchData64, 32, (21 + 3 + 6) * 4);
503 call->reply2 = NULL; /* volsync */
505 call->service_id = FS_SERVICE;
506 call->port = htons(AFS_FS_PORT);
507 call->operation_ID = FSFETCHDATA64;
509 /* marshall the parameters */
511 bp[0] = htonl(FSFETCHDATA64);
512 bp[1] = htonl(vnode->fid.vid);
513 bp[2] = htonl(vnode->fid.vnode);
514 bp[3] = htonl(vnode->fid.unique);
515 bp[4] = htonl(upper_32_bits(req->pos));
516 bp[5] = htonl(lower_32_bits(req->pos));
518 bp[7] = htonl(lower_32_bits(req->len));
520 atomic_inc(&req->usage);
521 return afs_make_call(&server->addr, call, GFP_NOFS, async);
525 * fetch data from a file
527 int afs_fs_fetch_data(struct afs_server *server,
529 struct afs_vnode *vnode,
530 struct afs_read *req,
533 struct afs_call *call;
536 if (upper_32_bits(req->pos) ||
537 upper_32_bits(req->len) ||
538 upper_32_bits(req->pos + req->len))
539 return afs_fs_fetch_data64(server, key, vnode, req, async);
543 call = afs_alloc_flat_call(&afs_RXFSFetchData, 24, (21 + 3 + 6) * 4);
549 call->reply2 = NULL; /* volsync */
551 call->service_id = FS_SERVICE;
552 call->port = htons(AFS_FS_PORT);
553 call->operation_ID = FSFETCHDATA;
555 /* marshall the parameters */
557 bp[0] = htonl(FSFETCHDATA);
558 bp[1] = htonl(vnode->fid.vid);
559 bp[2] = htonl(vnode->fid.vnode);
560 bp[3] = htonl(vnode->fid.unique);
561 bp[4] = htonl(lower_32_bits(req->pos));
562 bp[5] = htonl(lower_32_bits(req->len));
564 atomic_inc(&req->usage);
565 return afs_make_call(&server->addr, call, GFP_NOFS, async);
569 * deliver reply data to an FS.GiveUpCallBacks
571 static int afs_deliver_fs_give_up_callbacks(struct afs_call *call)
575 /* shouldn't be any reply data */
576 return afs_extract_data(call, NULL, 0, false);
580 * FS.GiveUpCallBacks operation type
582 static const struct afs_call_type afs_RXFSGiveUpCallBacks = {
583 .name = "FS.GiveUpCallBacks",
584 .deliver = afs_deliver_fs_give_up_callbacks,
585 .abort_to_error = afs_abort_to_error,
586 .destructor = afs_flat_call_destructor,
590 * give up a set of callbacks
591 * - the callbacks are held in the server->cb_break ring
593 int afs_fs_give_up_callbacks(struct afs_server *server,
596 struct afs_call *call;
601 ncallbacks = CIRC_CNT(server->cb_break_head, server->cb_break_tail,
602 ARRAY_SIZE(server->cb_break));
604 _enter("{%zu},", ncallbacks);
608 if (ncallbacks > AFSCBMAX)
609 ncallbacks = AFSCBMAX;
611 _debug("break %zu callbacks", ncallbacks);
613 call = afs_alloc_flat_call(&afs_RXFSGiveUpCallBacks,
614 12 + ncallbacks * 6 * 4, 0);
618 call->service_id = FS_SERVICE;
619 call->port = htons(AFS_FS_PORT);
621 /* marshall the parameters */
623 tp = bp + 2 + ncallbacks * 3;
624 *bp++ = htonl(FSGIVEUPCALLBACKS);
625 *bp++ = htonl(ncallbacks);
626 *tp++ = htonl(ncallbacks);
628 atomic_sub(ncallbacks, &server->cb_break_n);
629 for (loop = ncallbacks; loop > 0; loop--) {
630 struct afs_callback *cb =
631 &server->cb_break[server->cb_break_tail];
633 *bp++ = htonl(cb->fid.vid);
634 *bp++ = htonl(cb->fid.vnode);
635 *bp++ = htonl(cb->fid.unique);
636 *tp++ = htonl(cb->version);
637 *tp++ = htonl(cb->expiry);
638 *tp++ = htonl(cb->type);
640 server->cb_break_tail =
641 (server->cb_break_tail + 1) &
642 (ARRAY_SIZE(server->cb_break) - 1);
645 ASSERT(ncallbacks > 0);
646 wake_up_nr(&server->cb_break_waitq, ncallbacks);
648 return afs_make_call(&server->addr, call, GFP_NOFS, async);
652 * deliver reply data to an FS.CreateFile or an FS.MakeDir
654 static int afs_deliver_fs_create_vnode(struct afs_call *call)
656 struct afs_vnode *vnode = call->reply;
660 _enter("{%u}", call->unmarshall);
662 ret = afs_transfer_reply(call);
666 /* unmarshall the reply once we've received all of it */
668 xdr_decode_AFSFid(&bp, call->reply2);
669 xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL, NULL);
670 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
671 xdr_decode_AFSCallBack_raw(&bp, call->reply4);
672 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
674 _leave(" = 0 [done]");
679 * FS.CreateFile and FS.MakeDir operation type
681 static const struct afs_call_type afs_RXFSCreateXXXX = {
682 .name = "FS.CreateXXXX",
683 .deliver = afs_deliver_fs_create_vnode,
684 .abort_to_error = afs_abort_to_error,
685 .destructor = afs_flat_call_destructor,
689 * create a file or make a directory
691 int afs_fs_create(struct afs_server *server,
693 struct afs_vnode *vnode,
696 struct afs_fid *newfid,
697 struct afs_file_status *newstatus,
698 struct afs_callback *newcb,
701 struct afs_call *call;
702 size_t namesz, reqsz, padsz;
707 namesz = strlen(name);
708 padsz = (4 - (namesz & 3)) & 3;
709 reqsz = (5 * 4) + namesz + padsz + (6 * 4);
711 call = afs_alloc_flat_call(&afs_RXFSCreateXXXX, reqsz,
712 (3 + 21 + 21 + 3 + 6) * 4);
718 call->reply2 = newfid;
719 call->reply3 = newstatus;
720 call->reply4 = newcb;
721 call->service_id = FS_SERVICE;
722 call->port = htons(AFS_FS_PORT);
724 /* marshall the parameters */
726 *bp++ = htonl(S_ISDIR(mode) ? FSMAKEDIR : FSCREATEFILE);
727 *bp++ = htonl(vnode->fid.vid);
728 *bp++ = htonl(vnode->fid.vnode);
729 *bp++ = htonl(vnode->fid.unique);
730 *bp++ = htonl(namesz);
731 memcpy(bp, name, namesz);
732 bp = (void *) bp + namesz;
734 memset(bp, 0, padsz);
735 bp = (void *) bp + padsz;
737 *bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
738 *bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
739 *bp++ = 0; /* owner */
740 *bp++ = 0; /* group */
741 *bp++ = htonl(mode & S_IALLUGO); /* unix mode */
742 *bp++ = 0; /* segment size */
744 return afs_make_call(&server->addr, call, GFP_NOFS, async);
748 * deliver reply data to an FS.RemoveFile or FS.RemoveDir
750 static int afs_deliver_fs_remove(struct afs_call *call)
752 struct afs_vnode *vnode = call->reply;
756 _enter("{%u}", call->unmarshall);
758 ret = afs_transfer_reply(call);
762 /* unmarshall the reply once we've received all of it */
764 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
765 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
767 _leave(" = 0 [done]");
772 * FS.RemoveDir/FS.RemoveFile operation type
774 static const struct afs_call_type afs_RXFSRemoveXXXX = {
775 .name = "FS.RemoveXXXX",
776 .deliver = afs_deliver_fs_remove,
777 .abort_to_error = afs_abort_to_error,
778 .destructor = afs_flat_call_destructor,
782 * remove a file or directory
784 int afs_fs_remove(struct afs_server *server,
786 struct afs_vnode *vnode,
791 struct afs_call *call;
792 size_t namesz, reqsz, padsz;
797 namesz = strlen(name);
798 padsz = (4 - (namesz & 3)) & 3;
799 reqsz = (5 * 4) + namesz + padsz;
801 call = afs_alloc_flat_call(&afs_RXFSRemoveXXXX, reqsz, (21 + 6) * 4);
807 call->service_id = FS_SERVICE;
808 call->port = htons(AFS_FS_PORT);
810 /* marshall the parameters */
812 *bp++ = htonl(isdir ? FSREMOVEDIR : FSREMOVEFILE);
813 *bp++ = htonl(vnode->fid.vid);
814 *bp++ = htonl(vnode->fid.vnode);
815 *bp++ = htonl(vnode->fid.unique);
816 *bp++ = htonl(namesz);
817 memcpy(bp, name, namesz);
818 bp = (void *) bp + namesz;
820 memset(bp, 0, padsz);
821 bp = (void *) bp + padsz;
824 return afs_make_call(&server->addr, call, GFP_NOFS, async);
828 * deliver reply data to an FS.Link
830 static int afs_deliver_fs_link(struct afs_call *call)
832 struct afs_vnode *dvnode = call->reply, *vnode = call->reply2;
836 _enter("{%u}", call->unmarshall);
838 ret = afs_transfer_reply(call);
842 /* unmarshall the reply once we've received all of it */
844 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
845 xdr_decode_AFSFetchStatus(&bp, &dvnode->status, dvnode, NULL);
846 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
848 _leave(" = 0 [done]");
853 * FS.Link operation type
855 static const struct afs_call_type afs_RXFSLink = {
857 .deliver = afs_deliver_fs_link,
858 .abort_to_error = afs_abort_to_error,
859 .destructor = afs_flat_call_destructor,
865 int afs_fs_link(struct afs_server *server,
867 struct afs_vnode *dvnode,
868 struct afs_vnode *vnode,
872 struct afs_call *call;
873 size_t namesz, reqsz, padsz;
878 namesz = strlen(name);
879 padsz = (4 - (namesz & 3)) & 3;
880 reqsz = (5 * 4) + namesz + padsz + (3 * 4);
882 call = afs_alloc_flat_call(&afs_RXFSLink, reqsz, (21 + 21 + 6) * 4);
887 call->reply = dvnode;
888 call->reply2 = vnode;
889 call->service_id = FS_SERVICE;
890 call->port = htons(AFS_FS_PORT);
892 /* marshall the parameters */
894 *bp++ = htonl(FSLINK);
895 *bp++ = htonl(dvnode->fid.vid);
896 *bp++ = htonl(dvnode->fid.vnode);
897 *bp++ = htonl(dvnode->fid.unique);
898 *bp++ = htonl(namesz);
899 memcpy(bp, name, namesz);
900 bp = (void *) bp + namesz;
902 memset(bp, 0, padsz);
903 bp = (void *) bp + padsz;
905 *bp++ = htonl(vnode->fid.vid);
906 *bp++ = htonl(vnode->fid.vnode);
907 *bp++ = htonl(vnode->fid.unique);
909 return afs_make_call(&server->addr, call, GFP_NOFS, async);
913 * deliver reply data to an FS.Symlink
915 static int afs_deliver_fs_symlink(struct afs_call *call)
917 struct afs_vnode *vnode = call->reply;
921 _enter("{%u}", call->unmarshall);
923 ret = afs_transfer_reply(call);
927 /* unmarshall the reply once we've received all of it */
929 xdr_decode_AFSFid(&bp, call->reply2);
930 xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL, NULL);
931 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
932 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
934 _leave(" = 0 [done]");
939 * FS.Symlink operation type
941 static const struct afs_call_type afs_RXFSSymlink = {
942 .name = "FS.Symlink",
943 .deliver = afs_deliver_fs_symlink,
944 .abort_to_error = afs_abort_to_error,
945 .destructor = afs_flat_call_destructor,
949 * create a symbolic link
951 int afs_fs_symlink(struct afs_server *server,
953 struct afs_vnode *vnode,
955 const char *contents,
956 struct afs_fid *newfid,
957 struct afs_file_status *newstatus,
960 struct afs_call *call;
961 size_t namesz, reqsz, padsz, c_namesz, c_padsz;
966 namesz = strlen(name);
967 padsz = (4 - (namesz & 3)) & 3;
969 c_namesz = strlen(contents);
970 c_padsz = (4 - (c_namesz & 3)) & 3;
972 reqsz = (6 * 4) + namesz + padsz + c_namesz + c_padsz + (6 * 4);
974 call = afs_alloc_flat_call(&afs_RXFSSymlink, reqsz,
975 (3 + 21 + 21 + 6) * 4);
981 call->reply2 = newfid;
982 call->reply3 = newstatus;
983 call->service_id = FS_SERVICE;
984 call->port = htons(AFS_FS_PORT);
986 /* marshall the parameters */
988 *bp++ = htonl(FSSYMLINK);
989 *bp++ = htonl(vnode->fid.vid);
990 *bp++ = htonl(vnode->fid.vnode);
991 *bp++ = htonl(vnode->fid.unique);
992 *bp++ = htonl(namesz);
993 memcpy(bp, name, namesz);
994 bp = (void *) bp + namesz;
996 memset(bp, 0, padsz);
997 bp = (void *) bp + padsz;
999 *bp++ = htonl(c_namesz);
1000 memcpy(bp, contents, c_namesz);
1001 bp = (void *) bp + c_namesz;
1003 memset(bp, 0, c_padsz);
1004 bp = (void *) bp + c_padsz;
1006 *bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
1007 *bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
1008 *bp++ = 0; /* owner */
1009 *bp++ = 0; /* group */
1010 *bp++ = htonl(S_IRWXUGO); /* unix mode */
1011 *bp++ = 0; /* segment size */
1013 return afs_make_call(&server->addr, call, GFP_NOFS, async);
1017 * deliver reply data to an FS.Rename
1019 static int afs_deliver_fs_rename(struct afs_call *call)
1021 struct afs_vnode *orig_dvnode = call->reply, *new_dvnode = call->reply2;
1025 _enter("{%u}", call->unmarshall);
1027 ret = afs_transfer_reply(call);
1031 /* unmarshall the reply once we've received all of it */
1033 xdr_decode_AFSFetchStatus(&bp, &orig_dvnode->status, orig_dvnode, NULL);
1034 if (new_dvnode != orig_dvnode)
1035 xdr_decode_AFSFetchStatus(&bp, &new_dvnode->status, new_dvnode,
1037 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
1039 _leave(" = 0 [done]");
1044 * FS.Rename operation type
1046 static const struct afs_call_type afs_RXFSRename = {
1047 .name = "FS.Rename",
1048 .deliver = afs_deliver_fs_rename,
1049 .abort_to_error = afs_abort_to_error,
1050 .destructor = afs_flat_call_destructor,
1054 * create a symbolic link
1056 int afs_fs_rename(struct afs_server *server,
1058 struct afs_vnode *orig_dvnode,
1059 const char *orig_name,
1060 struct afs_vnode *new_dvnode,
1061 const char *new_name,
1064 struct afs_call *call;
1065 size_t reqsz, o_namesz, o_padsz, n_namesz, n_padsz;
1070 o_namesz = strlen(orig_name);
1071 o_padsz = (4 - (o_namesz & 3)) & 3;
1073 n_namesz = strlen(new_name);
1074 n_padsz = (4 - (n_namesz & 3)) & 3;
1077 4 + o_namesz + o_padsz +
1079 4 + n_namesz + n_padsz;
1081 call = afs_alloc_flat_call(&afs_RXFSRename, reqsz, (21 + 21 + 6) * 4);
1086 call->reply = orig_dvnode;
1087 call->reply2 = new_dvnode;
1088 call->service_id = FS_SERVICE;
1089 call->port = htons(AFS_FS_PORT);
1091 /* marshall the parameters */
1093 *bp++ = htonl(FSRENAME);
1094 *bp++ = htonl(orig_dvnode->fid.vid);
1095 *bp++ = htonl(orig_dvnode->fid.vnode);
1096 *bp++ = htonl(orig_dvnode->fid.unique);
1097 *bp++ = htonl(o_namesz);
1098 memcpy(bp, orig_name, o_namesz);
1099 bp = (void *) bp + o_namesz;
1101 memset(bp, 0, o_padsz);
1102 bp = (void *) bp + o_padsz;
1105 *bp++ = htonl(new_dvnode->fid.vid);
1106 *bp++ = htonl(new_dvnode->fid.vnode);
1107 *bp++ = htonl(new_dvnode->fid.unique);
1108 *bp++ = htonl(n_namesz);
1109 memcpy(bp, new_name, n_namesz);
1110 bp = (void *) bp + n_namesz;
1112 memset(bp, 0, n_padsz);
1113 bp = (void *) bp + n_padsz;
1116 return afs_make_call(&server->addr, call, GFP_NOFS, async);
1120 * deliver reply data to an FS.StoreData
1122 static int afs_deliver_fs_store_data(struct afs_call *call)
1124 struct afs_vnode *vnode = call->reply;
1130 ret = afs_transfer_reply(call);
1134 /* unmarshall the reply once we've received all of it */
1136 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode,
1137 &call->store_version);
1138 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
1140 afs_pages_written_back(vnode, call);
1142 _leave(" = 0 [done]");
1147 * FS.StoreData operation type
1149 static const struct afs_call_type afs_RXFSStoreData = {
1150 .name = "FS.StoreData",
1151 .deliver = afs_deliver_fs_store_data,
1152 .abort_to_error = afs_abort_to_error,
1153 .destructor = afs_flat_call_destructor,
1156 static const struct afs_call_type afs_RXFSStoreData64 = {
1157 .name = "FS.StoreData64",
1158 .deliver = afs_deliver_fs_store_data,
1159 .abort_to_error = afs_abort_to_error,
1160 .destructor = afs_flat_call_destructor,
1164 * store a set of pages to a very large file
1166 static int afs_fs_store_data64(struct afs_server *server,
1167 struct afs_writeback *wb,
1168 pgoff_t first, pgoff_t last,
1169 unsigned offset, unsigned to,
1170 loff_t size, loff_t pos, loff_t i_size,
1173 struct afs_vnode *vnode = wb->vnode;
1174 struct afs_call *call;
1177 _enter(",%x,{%x:%u},,",
1178 key_serial(wb->key), vnode->fid.vid, vnode->fid.vnode);
1180 call = afs_alloc_flat_call(&afs_RXFSStoreData64,
1181 (4 + 6 + 3 * 2) * 4,
1187 call->key = wb->key;
1188 call->reply = vnode;
1189 call->service_id = FS_SERVICE;
1190 call->port = htons(AFS_FS_PORT);
1191 call->mapping = vnode->vfs_inode.i_mapping;
1192 call->first = first;
1194 call->first_offset = offset;
1196 call->send_pages = true;
1197 call->store_version = vnode->status.data_version + 1;
1199 /* marshall the parameters */
1201 *bp++ = htonl(FSSTOREDATA64);
1202 *bp++ = htonl(vnode->fid.vid);
1203 *bp++ = htonl(vnode->fid.vnode);
1204 *bp++ = htonl(vnode->fid.unique);
1206 *bp++ = htonl(AFS_SET_MTIME); /* mask */
1207 *bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
1208 *bp++ = 0; /* owner */
1209 *bp++ = 0; /* group */
1210 *bp++ = 0; /* unix mode */
1211 *bp++ = 0; /* segment size */
1213 *bp++ = htonl(pos >> 32);
1214 *bp++ = htonl((u32) pos);
1215 *bp++ = htonl(size >> 32);
1216 *bp++ = htonl((u32) size);
1217 *bp++ = htonl(i_size >> 32);
1218 *bp++ = htonl((u32) i_size);
1220 return afs_make_call(&server->addr, call, GFP_NOFS, async);
1224 * store a set of pages
1226 int afs_fs_store_data(struct afs_server *server, struct afs_writeback *wb,
1227 pgoff_t first, pgoff_t last,
1228 unsigned offset, unsigned to,
1231 struct afs_vnode *vnode = wb->vnode;
1232 struct afs_call *call;
1233 loff_t size, pos, i_size;
1236 _enter(",%x,{%x:%u},,",
1237 key_serial(wb->key), vnode->fid.vid, vnode->fid.vnode);
1239 size = (loff_t)to - (loff_t)offset;
1241 size += (loff_t)(last - first) << PAGE_SHIFT;
1242 pos = (loff_t)first << PAGE_SHIFT;
1245 i_size = i_size_read(&vnode->vfs_inode);
1246 if (pos + size > i_size)
1247 i_size = size + pos;
1249 _debug("size %llx, at %llx, i_size %llx",
1250 (unsigned long long) size, (unsigned long long) pos,
1251 (unsigned long long) i_size);
1253 if (pos >> 32 || i_size >> 32 || size >> 32 || (pos + size) >> 32)
1254 return afs_fs_store_data64(server, wb, first, last, offset, to,
1255 size, pos, i_size, async);
1257 call = afs_alloc_flat_call(&afs_RXFSStoreData,
1264 call->key = wb->key;
1265 call->reply = vnode;
1266 call->service_id = FS_SERVICE;
1267 call->port = htons(AFS_FS_PORT);
1268 call->mapping = vnode->vfs_inode.i_mapping;
1269 call->first = first;
1271 call->first_offset = offset;
1273 call->send_pages = true;
1274 call->store_version = vnode->status.data_version + 1;
1276 /* marshall the parameters */
1278 *bp++ = htonl(FSSTOREDATA);
1279 *bp++ = htonl(vnode->fid.vid);
1280 *bp++ = htonl(vnode->fid.vnode);
1281 *bp++ = htonl(vnode->fid.unique);
1283 *bp++ = htonl(AFS_SET_MTIME); /* mask */
1284 *bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
1285 *bp++ = 0; /* owner */
1286 *bp++ = 0; /* group */
1287 *bp++ = 0; /* unix mode */
1288 *bp++ = 0; /* segment size */
1291 *bp++ = htonl(size);
1292 *bp++ = htonl(i_size);
1294 return afs_make_call(&server->addr, call, GFP_NOFS, async);
1298 * deliver reply data to an FS.StoreStatus
1300 static int afs_deliver_fs_store_status(struct afs_call *call)
1302 afs_dataversion_t *store_version;
1303 struct afs_vnode *vnode = call->reply;
1309 ret = afs_transfer_reply(call);
1313 /* unmarshall the reply once we've received all of it */
1314 store_version = NULL;
1315 if (call->operation_ID == FSSTOREDATA)
1316 store_version = &call->store_version;
1319 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, store_version);
1320 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
1322 _leave(" = 0 [done]");
1327 * FS.StoreStatus operation type
1329 static const struct afs_call_type afs_RXFSStoreStatus = {
1330 .name = "FS.StoreStatus",
1331 .deliver = afs_deliver_fs_store_status,
1332 .abort_to_error = afs_abort_to_error,
1333 .destructor = afs_flat_call_destructor,
1336 static const struct afs_call_type afs_RXFSStoreData_as_Status = {
1337 .name = "FS.StoreData",
1338 .deliver = afs_deliver_fs_store_status,
1339 .abort_to_error = afs_abort_to_error,
1340 .destructor = afs_flat_call_destructor,
1343 static const struct afs_call_type afs_RXFSStoreData64_as_Status = {
1344 .name = "FS.StoreData64",
1345 .deliver = afs_deliver_fs_store_status,
1346 .abort_to_error = afs_abort_to_error,
1347 .destructor = afs_flat_call_destructor,
1351 * set the attributes on a very large file, using FS.StoreData rather than
1352 * FS.StoreStatus so as to alter the file size also
1354 static int afs_fs_setattr_size64(struct afs_server *server, struct key *key,
1355 struct afs_vnode *vnode, struct iattr *attr,
1358 struct afs_call *call;
1361 _enter(",%x,{%x:%u},,",
1362 key_serial(key), vnode->fid.vid, vnode->fid.vnode);
1364 ASSERT(attr->ia_valid & ATTR_SIZE);
1366 call = afs_alloc_flat_call(&afs_RXFSStoreData64_as_Status,
1367 (4 + 6 + 3 * 2) * 4,
1373 call->reply = vnode;
1374 call->service_id = FS_SERVICE;
1375 call->port = htons(AFS_FS_PORT);
1376 call->store_version = vnode->status.data_version + 1;
1377 call->operation_ID = FSSTOREDATA;
1379 /* marshall the parameters */
1381 *bp++ = htonl(FSSTOREDATA64);
1382 *bp++ = htonl(vnode->fid.vid);
1383 *bp++ = htonl(vnode->fid.vnode);
1384 *bp++ = htonl(vnode->fid.unique);
1386 xdr_encode_AFS_StoreStatus(&bp, attr);
1388 *bp++ = 0; /* position of start of write */
1390 *bp++ = 0; /* size of write */
1392 *bp++ = htonl(attr->ia_size >> 32); /* new file length */
1393 *bp++ = htonl((u32) attr->ia_size);
1395 return afs_make_call(&server->addr, call, GFP_NOFS, async);
1399 * set the attributes on a file, using FS.StoreData rather than FS.StoreStatus
1400 * so as to alter the file size also
1402 static int afs_fs_setattr_size(struct afs_server *server, struct key *key,
1403 struct afs_vnode *vnode, struct iattr *attr,
1406 struct afs_call *call;
1409 _enter(",%x,{%x:%u},,",
1410 key_serial(key), vnode->fid.vid, vnode->fid.vnode);
1412 ASSERT(attr->ia_valid & ATTR_SIZE);
1413 if (attr->ia_size >> 32)
1414 return afs_fs_setattr_size64(server, key, vnode, attr,
1417 call = afs_alloc_flat_call(&afs_RXFSStoreData_as_Status,
1424 call->reply = vnode;
1425 call->service_id = FS_SERVICE;
1426 call->port = htons(AFS_FS_PORT);
1427 call->store_version = vnode->status.data_version + 1;
1428 call->operation_ID = FSSTOREDATA;
1430 /* marshall the parameters */
1432 *bp++ = htonl(FSSTOREDATA);
1433 *bp++ = htonl(vnode->fid.vid);
1434 *bp++ = htonl(vnode->fid.vnode);
1435 *bp++ = htonl(vnode->fid.unique);
1437 xdr_encode_AFS_StoreStatus(&bp, attr);
1439 *bp++ = 0; /* position of start of write */
1440 *bp++ = 0; /* size of write */
1441 *bp++ = htonl(attr->ia_size); /* new file length */
1443 return afs_make_call(&server->addr, call, GFP_NOFS, async);
1447 * set the attributes on a file, using FS.StoreData if there's a change in file
1448 * size, and FS.StoreStatus otherwise
1450 int afs_fs_setattr(struct afs_server *server, struct key *key,
1451 struct afs_vnode *vnode, struct iattr *attr,
1454 struct afs_call *call;
1457 if (attr->ia_valid & ATTR_SIZE)
1458 return afs_fs_setattr_size(server, key, vnode, attr,
1461 _enter(",%x,{%x:%u},,",
1462 key_serial(key), vnode->fid.vid, vnode->fid.vnode);
1464 call = afs_alloc_flat_call(&afs_RXFSStoreStatus,
1471 call->reply = vnode;
1472 call->service_id = FS_SERVICE;
1473 call->port = htons(AFS_FS_PORT);
1474 call->operation_ID = FSSTORESTATUS;
1476 /* marshall the parameters */
1478 *bp++ = htonl(FSSTORESTATUS);
1479 *bp++ = htonl(vnode->fid.vid);
1480 *bp++ = htonl(vnode->fid.vnode);
1481 *bp++ = htonl(vnode->fid.unique);
1483 xdr_encode_AFS_StoreStatus(&bp, attr);
1485 return afs_make_call(&server->addr, call, GFP_NOFS, async);
1489 * deliver reply data to an FS.GetVolumeStatus
1491 static int afs_deliver_fs_get_volume_status(struct afs_call *call)
1497 _enter("{%u}", call->unmarshall);
1499 switch (call->unmarshall) {
1504 /* extract the returned status record */
1506 _debug("extract status");
1507 ret = afs_extract_data(call, call->buffer,
1513 xdr_decode_AFSFetchVolumeStatus(&bp, call->reply2);
1517 /* extract the volume name length */
1519 ret = afs_extract_data(call, &call->tmp, 4, true);
1523 call->count = ntohl(call->tmp);
1524 _debug("volname length: %u", call->count);
1525 if (call->count >= AFSNAMEMAX)
1530 /* extract the volume name */
1532 _debug("extract volname");
1533 if (call->count > 0) {
1534 ret = afs_extract_data(call, call->reply3,
1542 _debug("volname '%s'", p);
1547 /* extract the volume name padding */
1548 if ((call->count & 3) == 0) {
1550 goto no_volname_padding;
1552 call->count = 4 - (call->count & 3);
1555 ret = afs_extract_data(call, call->buffer,
1564 /* extract the offline message length */
1566 ret = afs_extract_data(call, &call->tmp, 4, true);
1570 call->count = ntohl(call->tmp);
1571 _debug("offline msg length: %u", call->count);
1572 if (call->count >= AFSNAMEMAX)
1577 /* extract the offline message */
1579 _debug("extract offline");
1580 if (call->count > 0) {
1581 ret = afs_extract_data(call, call->reply3,
1589 _debug("offline '%s'", p);
1594 /* extract the offline message padding */
1595 if ((call->count & 3) == 0) {
1597 goto no_offline_padding;
1599 call->count = 4 - (call->count & 3);
1602 ret = afs_extract_data(call, call->buffer,
1611 /* extract the message of the day length */
1613 ret = afs_extract_data(call, &call->tmp, 4, true);
1617 call->count = ntohl(call->tmp);
1618 _debug("motd length: %u", call->count);
1619 if (call->count >= AFSNAMEMAX)
1624 /* extract the message of the day */
1626 _debug("extract motd");
1627 if (call->count > 0) {
1628 ret = afs_extract_data(call, call->reply3,
1636 _debug("motd '%s'", p);
1641 /* extract the message of the day padding */
1642 call->count = (4 - (call->count & 3)) & 3;
1645 ret = afs_extract_data(call, call->buffer,
1646 call->count, false);
1656 _leave(" = 0 [done]");
1661 * destroy an FS.GetVolumeStatus call
1663 static void afs_get_volume_status_call_destructor(struct afs_call *call)
1665 kfree(call->reply3);
1666 call->reply3 = NULL;
1667 afs_flat_call_destructor(call);
1671 * FS.GetVolumeStatus operation type
1673 static const struct afs_call_type afs_RXFSGetVolumeStatus = {
1674 .name = "FS.GetVolumeStatus",
1675 .deliver = afs_deliver_fs_get_volume_status,
1676 .abort_to_error = afs_abort_to_error,
1677 .destructor = afs_get_volume_status_call_destructor,
1681 * fetch the status of a volume
1683 int afs_fs_get_volume_status(struct afs_server *server,
1685 struct afs_vnode *vnode,
1686 struct afs_volume_status *vs,
1689 struct afs_call *call;
1695 tmpbuf = kmalloc(AFSOPAQUEMAX, GFP_KERNEL);
1699 call = afs_alloc_flat_call(&afs_RXFSGetVolumeStatus, 2 * 4, 12 * 4);
1706 call->reply = vnode;
1708 call->reply3 = tmpbuf;
1709 call->service_id = FS_SERVICE;
1710 call->port = htons(AFS_FS_PORT);
1712 /* marshall the parameters */
1714 bp[0] = htonl(FSGETVOLUMESTATUS);
1715 bp[1] = htonl(vnode->fid.vid);
1717 return afs_make_call(&server->addr, call, GFP_NOFS, async);
1721 * deliver reply data to an FS.SetLock, FS.ExtendLock or FS.ReleaseLock
1723 static int afs_deliver_fs_xxxx_lock(struct afs_call *call)
1728 _enter("{%u}", call->unmarshall);
1730 ret = afs_transfer_reply(call);
1734 /* unmarshall the reply once we've received all of it */
1736 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
1738 _leave(" = 0 [done]");
1743 * FS.SetLock operation type
1745 static const struct afs_call_type afs_RXFSSetLock = {
1746 .name = "FS.SetLock",
1747 .deliver = afs_deliver_fs_xxxx_lock,
1748 .abort_to_error = afs_abort_to_error,
1749 .destructor = afs_flat_call_destructor,
1753 * FS.ExtendLock operation type
1755 static const struct afs_call_type afs_RXFSExtendLock = {
1756 .name = "FS.ExtendLock",
1757 .deliver = afs_deliver_fs_xxxx_lock,
1758 .abort_to_error = afs_abort_to_error,
1759 .destructor = afs_flat_call_destructor,
1763 * FS.ReleaseLock operation type
1765 static const struct afs_call_type afs_RXFSReleaseLock = {
1766 .name = "FS.ReleaseLock",
1767 .deliver = afs_deliver_fs_xxxx_lock,
1768 .abort_to_error = afs_abort_to_error,
1769 .destructor = afs_flat_call_destructor,
1773 * get a lock on a file
1775 int afs_fs_set_lock(struct afs_server *server,
1777 struct afs_vnode *vnode,
1778 afs_lock_type_t type,
1781 struct afs_call *call;
1786 call = afs_alloc_flat_call(&afs_RXFSSetLock, 5 * 4, 6 * 4);
1791 call->reply = vnode;
1792 call->service_id = FS_SERVICE;
1793 call->port = htons(AFS_FS_PORT);
1795 /* marshall the parameters */
1797 *bp++ = htonl(FSSETLOCK);
1798 *bp++ = htonl(vnode->fid.vid);
1799 *bp++ = htonl(vnode->fid.vnode);
1800 *bp++ = htonl(vnode->fid.unique);
1801 *bp++ = htonl(type);
1803 return afs_make_call(&server->addr, call, GFP_NOFS, async);
1807 * extend a lock on a file
1809 int afs_fs_extend_lock(struct afs_server *server,
1811 struct afs_vnode *vnode,
1814 struct afs_call *call;
1819 call = afs_alloc_flat_call(&afs_RXFSExtendLock, 4 * 4, 6 * 4);
1824 call->reply = vnode;
1825 call->service_id = FS_SERVICE;
1826 call->port = htons(AFS_FS_PORT);
1828 /* marshall the parameters */
1830 *bp++ = htonl(FSEXTENDLOCK);
1831 *bp++ = htonl(vnode->fid.vid);
1832 *bp++ = htonl(vnode->fid.vnode);
1833 *bp++ = htonl(vnode->fid.unique);
1835 return afs_make_call(&server->addr, call, GFP_NOFS, async);
1839 * release a lock on a file
1841 int afs_fs_release_lock(struct afs_server *server,
1843 struct afs_vnode *vnode,
1846 struct afs_call *call;
1851 call = afs_alloc_flat_call(&afs_RXFSReleaseLock, 4 * 4, 6 * 4);
1856 call->reply = vnode;
1857 call->service_id = FS_SERVICE;
1858 call->port = htons(AFS_FS_PORT);
1860 /* marshall the parameters */
1862 *bp++ = htonl(FSRELEASELOCK);
1863 *bp++ = htonl(vnode->fid.vid);
1864 *bp++ = htonl(vnode->fid.vnode);
1865 *bp++ = htonl(vnode->fid.unique);
1867 return afs_make_call(&server->addr, call, GFP_NOFS, async);