1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Lustre Lite Update Records
6 * Copyright (c) 2002, 2003 Cluster File Systems, Inc.
8 * This file is part of Lustre, http://www.lustre.org.
10 * Lustre is free software; you can redistribute it and/or
11 * modify it under the terms of version 2 of the GNU General Public
12 * License as published by the Free Software Foundation.
14 * Lustre is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with Lustre; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include <linux/config.h>
25 #include <linux/module.h>
26 #include <linux/kernel.h>
28 #include <linux/string.h>
29 #include <linux/stat.h>
30 #include <linux/errno.h>
31 #include <linux/version.h>
32 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
33 #include <linux/locks.h> // for wait_on_buffer
35 #include <linux/buffer_head.h> // for wait_on_buffer
37 #include <linux/unistd.h>
39 #include <asm/system.h>
40 #include <asm/uaccess.h>
43 #include <linux/stat.h>
44 #include <asm/uaccess.h>
45 #include <linux/slab.h>
46 #include <asm/segment.h>
48 #define DEBUG_SUBSYSTEM S_MDS
50 #include <linux/obd_support.h>
51 #include <linux/lustre_lib.h>
52 #include <linux/lustre_mds.h>
53 #include <linux/lustre_lite.h>
55 void mds_pack_inode2fid(struct ll_fid *fid, struct inode *inode)
57 fid->id = HTON__u64(inode->i_ino);
58 fid->generation = HTON__u32(inode->i_generation);
59 fid->f_type = HTON__u32(S_IFMT & inode->i_mode);
62 void mds_pack_inode2body(struct mds_body *b, struct inode *inode)
64 b->valid = OBD_MD_FLID | OBD_MD_FLATIME | OBD_MD_FLMTIME |
65 OBD_MD_FLCTIME | OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
66 OBD_MD_FLUID | OBD_MD_FLGID | OBD_MD_FLTYPE | OBD_MD_FLMODE |
67 OBD_MD_FLNLINK | OBD_MD_FLGENER;
69 /* The MDS file size isn't authoritative for regular files, so don't
71 if (S_ISREG(inode->i_mode))
72 b->valid &= ~(OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
74 b->ino = HTON__u32(inode->i_ino);
75 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
76 b->atime = HTON__u32(inode->i_atime);
77 b->mtime = HTON__u32(inode->i_mtime);
78 b->ctime = HTON__u32(inode->i_ctime);
80 b->atime = HTON__u32(inode->i_atime.tv_sec);
81 b->mtime = HTON__u32(inode->i_mtime.tv_sec);
82 b->ctime = HTON__u32(inode->i_ctime.tv_sec);
84 b->mode = HTON__u32(inode->i_mode);
85 b->size = HTON__u64(inode->i_size);
86 b->blocks = HTON__u64(inode->i_blocks);
87 b->uid = HTON__u32(inode->i_uid);
88 b->gid = HTON__u32(inode->i_gid);
89 b->flags = HTON__u32(inode->i_flags);
90 b->rdev = HTON__u32(b->rdev);
91 b->nlink = HTON__u32(inode->i_nlink);
92 b->generation = HTON__u32(inode->i_generation);
93 b->suppgid = HTON__u32(-1);
97 void mds_pack_fid(struct ll_fid *fid)
99 fid->id = HTON__u64(fid->id);
100 fid->generation = HTON__u32(fid->generation);
101 fid->f_type = HTON__u32(fid->f_type);
104 static void mds_pack_body(struct mds_body *b)
109 b->fsuid = HTON__u32(current->fsuid);
110 b->fsgid = HTON__u32(current->fsgid);
111 b->capability = HTON__u32(current->cap_effective);
113 mds_pack_fid(&b->fid1);
114 mds_pack_fid(&b->fid2);
115 b->size = HTON__u64(b->size);
116 b->ino = HTON__u32(b->ino);
117 b->valid = HTON__u32(b->valid);
118 b->mode = HTON__u32(b->mode);
119 b->uid = HTON__u32(b->uid);
120 b->gid = HTON__u32(b->gid);
121 b->mtime = HTON__u32(b->mtime);
122 b->ctime = HTON__u32(b->ctime);
123 b->atime = HTON__u32(b->atime);
124 b->flags = HTON__u32(b->flags);
125 b->rdev = HTON__u32(b->rdev);
126 b->nlink = HTON__u32(b->nlink);
127 b->generation = HTON__u32(b->generation);
128 b->suppgid = HTON__u32(b->suppgid);
131 void mds_getattr_pack(struct ptlrpc_request *req, int valid, int offset,
133 struct inode *inode, const char *name, int namelen)
136 b = lustre_msg_buf(req->rq_reqmsg, offset);
138 b->fsuid = HTON__u32(current->fsuid);
139 b->fsgid = HTON__u32(current->fsgid);
140 b->capability = HTON__u32(current->cap_effective);
141 b->valid = HTON__u32(valid);
142 b->flags = HTON__u32(flags);
143 if (in_group_p(inode->i_gid))
144 b->suppgid = HTON__u32(inode->i_gid);
146 b->suppgid = HTON__u32(-1);
148 ll_inode2fid(&b->fid1, inode);
151 tmp = lustre_msg_buf(req->rq_reqmsg, offset + 1);
152 LOGL0(name, namelen, tmp);
156 void mds_readdir_pack(struct ptlrpc_request *req, __u64 offset,
157 obd_id ino, int type, __u64 xid)
161 b = lustre_msg_buf(req->rq_reqmsg, 0);
162 b->fsuid = HTON__u32(current->fsuid);
163 b->fsgid = HTON__u32(current->fsgid);
164 b->capability = HTON__u32(current->cap_effective);
165 b->fid1.id = HTON__u64(ino);
166 b->fid1.f_type = HTON__u32(type);
167 b->size = HTON__u64(offset);
168 b->suppgid = HTON__u32(-1);
169 b->blocks = HTON__u64(xid);
173 void mds_pack_req_body(struct ptlrpc_request *req)
175 struct mds_body *b = lustre_msg_buf(req->rq_reqmsg, 0);
179 void mds_pack_rep_body(struct ptlrpc_request *req)
181 struct mds_body *b = lustre_msg_buf(req->rq_repmsg, 0);
186 /* packing of MDS records */
187 void mds_create_pack(struct ptlrpc_request *req, int offset, struct inode *dir,
188 __u32 mode, __u64 rdev, __u32 uid, __u32 gid, __u64 time,
189 const char *name, int namelen,
190 const void *data, int datalen)
192 struct mds_rec_create *rec;
194 rec = lustre_msg_buf(req->rq_reqmsg, offset);
196 rec->cr_opcode = HTON__u32(REINT_CREATE);
197 rec->cr_fsuid = HTON__u32(current->fsuid);
198 rec->cr_fsgid = HTON__u32(current->fsgid);
199 rec->cr_cap = HTON__u32(current->cap_effective);
200 ll_inode2fid(&rec->cr_fid, dir);
201 memset(&rec->cr_replayfid, 0, sizeof(rec->cr_replayfid));
202 rec->cr_mode = HTON__u32(mode);
203 rec->cr_rdev = HTON__u64(rdev);
204 rec->cr_uid = HTON__u32(uid);
205 rec->cr_gid = HTON__u32(gid);
206 rec->cr_time = HTON__u64(time);
207 if (in_group_p(dir->i_gid))
208 rec->cr_suppgid = HTON__u32(dir->i_gid);
210 rec->cr_suppgid = HTON__u32(-1);
212 tmp = lustre_msg_buf(req->rq_reqmsg, offset + 1);
213 LOGL0(name, namelen, tmp);
216 tmp = lustre_msg_buf(req->rq_reqmsg, offset + 2);
217 LOGL0(data, datalen, tmp);
220 /* packing of MDS records */
221 void mds_open_pack(struct ptlrpc_request *req, int offset, struct inode *dir,
222 __u32 mode, __u64 rdev, __u32 uid, __u32 gid, __u64 time,
224 const char *name, int namelen,
225 const void *data, int datalen)
227 struct mds_rec_create *rec;
229 rec = lustre_msg_buf(req->rq_reqmsg, offset);
231 /* XXX do something about time, uid, gid */
232 rec->cr_opcode = HTON__u32(REINT_OPEN);
233 rec->cr_fsuid = HTON__u32(current->fsuid);
234 rec->cr_fsgid = HTON__u32(current->fsgid);
235 rec->cr_cap = HTON__u32(current->cap_effective);
236 ll_inode2fid(&rec->cr_fid, dir);
237 memset(&rec->cr_replayfid, 0, sizeof(rec->cr_replayfid));
238 rec->cr_mode = HTON__u32(mode);
239 rec->cr_flags = HTON__u32(flags);
240 rec->cr_rdev = HTON__u64(rdev);
241 rec->cr_uid = HTON__u32(uid);
242 rec->cr_gid = HTON__u32(gid);
243 rec->cr_time = HTON__u64(time);
244 if (in_group_p(dir->i_gid))
245 rec->cr_suppgid = HTON__u32(dir->i_gid);
247 rec->cr_suppgid = HTON__u32(-1);
249 tmp = lustre_msg_buf(req->rq_reqmsg, offset + 1);
250 LOGL0(name, namelen, tmp);
253 tmp = lustre_msg_buf(req->rq_reqmsg, offset + 2);
254 LOGL0(data, datalen, tmp);
258 void mds_setattr_pack(struct ptlrpc_request *req,
259 struct inode *inode, struct iattr *iattr,
262 struct mds_rec_setattr *rec = lustre_msg_buf(req->rq_reqmsg, 0);
264 rec->sa_opcode = HTON__u32(REINT_SETATTR);
265 rec->sa_fsuid = HTON__u32(current->fsuid);
266 rec->sa_fsgid = HTON__u32(current->fsgid);
267 rec->sa_cap = HTON__u32(current->cap_effective);
268 ll_inode2fid(&rec->sa_fid, inode);
271 rec->sa_valid = HTON__u32(iattr->ia_valid);
272 rec->sa_mode = HTON__u32(iattr->ia_mode);
273 rec->sa_uid = HTON__u32(iattr->ia_uid);
274 rec->sa_gid = HTON__u32(iattr->ia_gid);
275 rec->sa_size = HTON__u64(iattr->ia_size);
276 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
277 rec->sa_atime = HTON__u64(iattr->ia_atime);
278 rec->sa_mtime = HTON__u64(iattr->ia_mtime);
279 rec->sa_ctime = HTON__u64(iattr->ia_ctime);
281 rec->sa_atime = HTON__u64(iattr->ia_atime.tv_sec);
282 rec->sa_mtime = HTON__u64(iattr->ia_mtime.tv_sec);
283 rec->sa_ctime = HTON__u64(iattr->ia_ctime.tv_sec);
285 rec->sa_attr_flags = HTON__u32(iattr->ia_attr_flags);
287 if ((iattr->ia_valid & ATTR_GID) && in_group_p(iattr->ia_gid))
288 rec->sa_suppgid = HTON__u32(iattr->ia_gid);
289 else if ((iattr->ia_valid & ATTR_MODE) &&
290 in_group_p(inode->i_gid))
291 rec->sa_suppgid = HTON__u32(inode->i_gid);
293 rec->sa_suppgid = HTON__u32(-1);
297 memcpy(lustre_msg_buf(req->rq_reqmsg, 1), ea, ealen);
300 void mds_unlink_pack(struct ptlrpc_request *req, int offset,
301 struct inode *inode, struct inode *child, __u32 mode,
302 const char *name, int namelen)
304 struct mds_rec_unlink *rec;
307 rec = lustre_msg_buf(req->rq_reqmsg, offset);
309 rec->ul_opcode = HTON__u32(REINT_UNLINK);
310 rec->ul_fsuid = HTON__u32(current->fsuid);
311 rec->ul_fsgid = HTON__u32(current->fsgid);
312 rec->ul_cap = HTON__u32(current->cap_effective);
313 rec->ul_mode = HTON__u32(mode);
314 if (in_group_p(inode->i_gid))
315 rec->ul_suppgid = HTON__u32(inode->i_gid);
317 rec->ul_suppgid = HTON__u32(-1);
318 ll_inode2fid(&rec->ul_fid1, inode);
320 ll_inode2fid(&rec->ul_fid2, child);
322 tmp = lustre_msg_buf(req->rq_reqmsg, offset + 1);
323 LOGL0(name, namelen, tmp);
326 void mds_link_pack(struct ptlrpc_request *req, int offset,
327 struct inode *inode, struct inode *dir,
328 const char *name, int namelen)
330 struct mds_rec_link *rec;
333 rec = lustre_msg_buf(req->rq_reqmsg, offset);
335 rec->lk_opcode = HTON__u32(REINT_LINK);
336 rec->lk_fsuid = HTON__u32(current->fsuid);
337 rec->lk_fsgid = HTON__u32(current->fsgid);
338 rec->lk_cap = HTON__u32(current->cap_effective);
339 if (in_group_p(dir->i_gid))
340 rec->lk_suppgid = HTON__u32(dir->i_gid);
342 rec->lk_suppgid = HTON__u32(-1);
343 ll_inode2fid(&rec->lk_fid1, inode);
344 ll_inode2fid(&rec->lk_fid2, dir);
346 tmp = lustre_msg_buf(req->rq_reqmsg, offset + 1);
347 LOGL0(name, namelen, tmp);
350 void mds_rename_pack(struct ptlrpc_request *req, int offset,
351 struct inode *srcdir, struct inode *tgtdir,
352 const char *old, int oldlen, const char *new, int newlen)
354 struct mds_rec_rename *rec;
357 rec = lustre_msg_buf(req->rq_reqmsg, offset);
359 /* XXX do something about time, uid, gid */
360 rec->rn_opcode = HTON__u32(REINT_RENAME);
361 rec->rn_fsuid = HTON__u32(current->fsuid);
362 rec->rn_fsgid = HTON__u32(current->fsgid);
363 rec->rn_cap = HTON__u32(current->cap_effective);
364 if (in_group_p(srcdir->i_gid))
365 rec->rn_suppgid1 = HTON__u32(srcdir->i_gid);
367 rec->rn_suppgid1 = HTON__u32(-1);
368 if (in_group_p(tgtdir->i_gid))
369 rec->rn_suppgid2 = HTON__u32(tgtdir->i_gid);
371 rec->rn_suppgid2 = HTON__u32(-1);
372 ll_inode2fid(&rec->rn_fid1, srcdir);
373 ll_inode2fid(&rec->rn_fid2, tgtdir);
375 tmp = lustre_msg_buf(req->rq_reqmsg, offset + 1);
376 LOGL0(old, oldlen, tmp);
379 tmp = lustre_msg_buf(req->rq_reqmsg, offset + 2);
380 LOGL0(new, newlen, tmp);
385 void mds_unpack_fid(struct ll_fid *fid)
387 fid->id = NTOH__u64(fid->id);
388 fid->generation = NTOH__u32(fid->generation);
389 fid->f_type = NTOH__u32(fid->f_type);
392 void mds_unpack_body(struct mds_body *b)
397 mds_unpack_fid(&b->fid1);
398 mds_unpack_fid(&b->fid2);
399 b->size = NTOH__u64(b->size);
400 b->blocks = NTOH__u64(b->blocks);
401 b->valid = NTOH__u32(b->valid);
402 b->fsuid = NTOH__u32(b->fsuid);
403 b->fsgid = NTOH__u32(b->fsgid);
404 b->capability = NTOH__u32(b->capability);
405 b->ino = NTOH__u32(b->ino);
406 b->mode = NTOH__u32(b->mode);
407 b->uid = NTOH__u32(b->uid);
408 b->gid = NTOH__u32(b->gid);
409 b->mtime = NTOH__u32(b->mtime);
410 b->ctime = NTOH__u32(b->ctime);
411 b->atime = NTOH__u32(b->atime);
412 b->flags = NTOH__u32(b->flags);
413 b->rdev = NTOH__u32(b->rdev);
414 b->nlink = NTOH__u32(b->nlink);
415 b->generation = NTOH__u32(b->generation);
416 b->suppgid = NTOH__u32(b->suppgid);
419 static int mds_setattr_unpack(struct ptlrpc_request *req, int offset,
420 struct mds_update_record *r)
422 struct iattr *attr = &r->ur_iattr;
423 struct mds_rec_setattr *rec = lustre_msg_buf(req->rq_reqmsg, offset);
426 if (req->rq_reqmsg->bufcount < offset + 1 ||
427 req->rq_reqmsg->buflens[offset] != sizeof(*rec))
430 r->ur_fsuid = NTOH__u32(rec->sa_fsuid);
431 r->ur_fsgid = NTOH__u32(rec->sa_fsgid);
432 r->ur_cap = NTOH__u32(rec->sa_cap);
433 r->ur_suppgid1 = NTOH__u32(rec->sa_suppgid);
434 r->ur_suppgid2 = NTOH__u32(-1);
435 r->ur_fid1 = &rec->sa_fid;
436 attr->ia_valid = NTOH__u32(rec->sa_valid);
437 attr->ia_mode = NTOH__u32(rec->sa_mode);
438 attr->ia_uid = NTOH__u32(rec->sa_uid);
439 attr->ia_gid = NTOH__u32(rec->sa_gid);
440 attr->ia_size = NTOH__u64(rec->sa_size);
441 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
442 attr->ia_atime = NTOH__u64(rec->sa_atime);
443 attr->ia_mtime = NTOH__u64(rec->sa_mtime);
444 attr->ia_ctime = NTOH__u64(rec->sa_ctime);
446 attr->ia_atime.tv_sec = NTOH__u64(rec->sa_atime);
447 attr->ia_mtime.tv_sec = NTOH__u64(rec->sa_mtime);
448 attr->ia_ctime.tv_sec = NTOH__u64(rec->sa_ctime);
450 attr->ia_attr_flags = NTOH__u32(rec->sa_attr_flags);
452 if (req->rq_reqmsg->bufcount == offset + 2) {
453 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
454 r->ur_name = lustre_msg_buf(req->rq_reqmsg, offset + 1);
462 static int mds_create_unpack(struct ptlrpc_request *req, int offset,
463 struct mds_update_record *r)
465 struct mds_rec_create *rec = lustre_msg_buf(req->rq_reqmsg, offset);
468 if (req->rq_reqmsg->bufcount < offset + 2 ||
469 req->rq_reqmsg->buflens[offset] != sizeof(*rec))
472 r->ur_fsuid = NTOH__u32(rec->cr_fsuid);
473 r->ur_fsgid = NTOH__u32(rec->cr_fsgid);
474 r->ur_cap = NTOH__u32(rec->cr_cap);
475 r->ur_fid1 = &rec->cr_fid;
476 r->ur_fid2 = &rec->cr_replayfid;
477 r->ur_mode = NTOH__u32(rec->cr_mode);
478 r->ur_rdev = NTOH__u64(rec->cr_rdev);
479 r->ur_uid = NTOH__u32(rec->cr_uid);
480 r->ur_gid = NTOH__u32(rec->cr_gid);
481 r->ur_time = NTOH__u64(rec->cr_time);
482 r->ur_flags = NTOH__u32(rec->cr_flags);
483 r->ur_suppgid1 = NTOH__u32(rec->cr_suppgid);
484 r->ur_suppgid2 = NTOH__u32(-1);
486 r->ur_name = lustre_msg_buf(req->rq_reqmsg, offset + 1);
487 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
489 if (req->rq_reqmsg->bufcount == offset + 3) {
490 r->ur_tgt = lustre_msg_buf(req->rq_reqmsg, offset + 2);
491 r->ur_tgtlen = req->rq_reqmsg->buflens[offset + 2];
499 static int mds_link_unpack(struct ptlrpc_request *req, int offset,
500 struct mds_update_record *r)
502 struct mds_rec_link *rec = lustre_msg_buf(req->rq_reqmsg, offset);
505 if (req->rq_reqmsg->bufcount != offset + 2 ||
506 req->rq_reqmsg->buflens[offset] != sizeof(*rec))
509 r->ur_fsuid = NTOH__u32(rec->lk_fsuid);
510 r->ur_fsgid = NTOH__u32(rec->lk_fsgid);
511 r->ur_cap = NTOH__u32(rec->lk_cap);
512 r->ur_suppgid1 = NTOH__u32(rec->lk_suppgid);
513 r->ur_suppgid2 = NTOH__u32(-1);
514 r->ur_fid1 = &rec->lk_fid1;
515 r->ur_fid2 = &rec->lk_fid2;
517 r->ur_name = lustre_msg_buf(req->rq_reqmsg, offset + 1);
518 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
522 static int mds_unlink_unpack(struct ptlrpc_request *req, int offset,
523 struct mds_update_record *r)
525 struct mds_rec_unlink *rec = lustre_msg_buf(req->rq_reqmsg, offset);
528 if (req->rq_reqmsg->bufcount != offset + 2 ||
529 req->rq_reqmsg->buflens[offset] != sizeof(*rec))
532 r->ur_fsuid = NTOH__u32(rec->ul_fsuid);
533 r->ur_fsgid = NTOH__u32(rec->ul_fsgid);
534 r->ur_cap = NTOH__u32(rec->ul_cap);
535 r->ur_mode = NTOH__u32(rec->ul_mode);
536 r->ur_suppgid1 = NTOH__u32(rec->ul_suppgid);
537 r->ur_suppgid2 = NTOH__u32(-1);
538 r->ur_fid1 = &rec->ul_fid1;
539 r->ur_fid2 = &rec->ul_fid2;
541 r->ur_name = lustre_msg_buf(req->rq_reqmsg, offset + 1);
542 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
546 static int mds_rename_unpack(struct ptlrpc_request *req, int offset,
547 struct mds_update_record *r)
549 struct mds_rec_rename *rec = lustre_msg_buf(req->rq_reqmsg, offset);
552 if (req->rq_reqmsg->bufcount != offset + 3 ||
553 req->rq_reqmsg->buflens[offset] != sizeof(*rec))
556 r->ur_fsuid = NTOH__u32(rec->rn_fsuid);
557 r->ur_fsgid = NTOH__u32(rec->rn_fsgid);
558 r->ur_cap = NTOH__u32(rec->rn_cap);
559 r->ur_suppgid1 = NTOH__u32(rec->rn_suppgid1);
560 r->ur_suppgid2 = NTOH__u32(rec->rn_suppgid2);
561 r->ur_fid1 = &rec->rn_fid1;
562 r->ur_fid2 = &rec->rn_fid2;
564 r->ur_name = lustre_msg_buf(req->rq_reqmsg, offset + 1);
565 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
567 r->ur_tgt = lustre_msg_buf(req->rq_reqmsg, offset + 2);
568 r->ur_tgtlen = req->rq_reqmsg->buflens[offset + 2];
572 typedef int (*update_unpacker)(struct ptlrpc_request *req, int offset,
573 struct mds_update_record *r);
575 static update_unpacker mds_unpackers[REINT_MAX + 1] = {
576 [REINT_SETATTR] mds_setattr_unpack,
577 [REINT_CREATE] mds_create_unpack,
578 [REINT_LINK] mds_link_unpack,
579 [REINT_UNLINK] mds_unlink_unpack,
580 [REINT_RENAME] mds_rename_unpack,
581 [REINT_OPEN] mds_create_unpack,
584 int mds_update_unpack(struct ptlrpc_request *req, int offset,
585 struct mds_update_record *rec)
587 __u32 *opcode = lustre_msg_buf(req->rq_reqmsg, offset);
591 if (!opcode || req->rq_reqmsg->buflens[offset] < sizeof(*opcode))
594 realop = rec->ur_opcode = NTOH__u32(*opcode);
595 realop &= REINT_OPCODE_MASK;
597 if (realop < 0 || realop > REINT_MAX) {
602 rc = mds_unpackers[realop](req, offset, rec);