1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (c) 2003 Cluster File Systems, Inc.
6 * This file is part of the Lustre file system, http://www.lustre.org
7 * Lustre is a trademark of Cluster File Systems, Inc.
9 * You may have signed or agreed to another license before downloading
10 * this software. If so, you are bound by the terms and conditions
11 * of that agreement, and the following does not apply to you. See the
12 * LICENSE file included with this distribution for more information.
14 * If you did not agree to a different license, then this copy of Lustre
15 * is open source software; you can redistribute it and/or modify it
16 * under the terms of version 2 of the GNU General Public License as
17 * published by the Free Software Foundation.
19 * In either case, Lustre is distributed in the hope that it will be
20 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
21 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * license text for more details.
25 #define DEBUG_SUBSYSTEM S_MDS
27 #ifndef AUTOCONF_INCLUDED
28 #include <linux/config.h>
30 #include <linux/module.h>
31 #include <linux/kernel.h>
33 #include <linux/string.h>
34 #include <linux/stat.h>
35 #include <linux/errno.h>
36 #include <linux/version.h>
37 #include <linux/buffer_head.h> // for wait_on_buffer
38 #include <linux/unistd.h>
40 #include <asm/system.h>
41 #include <asm/uaccess.h>
44 #include <linux/stat.h>
45 #include <asm/uaccess.h>
46 #include <linux/slab.h>
48 #include <obd_support.h>
49 #include <lustre_lib.h>
50 #include "mds_internal.h"
52 void mds_pack_inode2fid(struct ll_fid *fid, struct inode *inode)
54 fid->id = inode->i_ino;
55 fid->generation = inode->i_generation;
56 fid->f_type = (S_IFMT & inode->i_mode);
59 /* Note that we can copy all of the fields, just some will not be "valid" */
60 void mds_pack_inode2body(struct mds_body *b, struct inode *inode)
62 b->valid |= OBD_MD_FLID | OBD_MD_FLCTIME | OBD_MD_FLUID |
63 OBD_MD_FLGID | OBD_MD_FLFLAGS | OBD_MD_FLTYPE |
64 OBD_MD_FLMODE | OBD_MD_FLNLINK | OBD_MD_FLGENER |
65 OBD_MD_FLATIME | OBD_MD_FLMTIME; /* bug 2020 */
67 if (!S_ISREG(inode->i_mode))
68 b->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS | OBD_MD_FLATIME |
69 OBD_MD_FLMTIME | OBD_MD_FLRDEV;
71 b->ino = inode->i_ino;
72 b->atime = LTIME_S(inode->i_atime);
73 b->mtime = LTIME_S(inode->i_mtime);
74 b->ctime = LTIME_S(inode->i_ctime);
75 b->mode = inode->i_mode;
76 b->size = i_size_read(inode);
77 b->blocks = inode->i_blocks;
78 b->uid = inode->i_uid;
79 b->gid = inode->i_gid;
80 b->flags = ll_inode_to_ext_flags(b->flags, inode->i_flags);
81 b->rdev = inode->i_rdev;
82 /* Return the correct link count for orphan inodes */
83 b->nlink = mds_inode_is_orphan(inode) ? 0 : inode->i_nlink;
84 b->generation = inode->i_generation;
88 static inline unsigned int attr_unpack(__u64 sa_valid) {
89 unsigned int ia_valid = 0;
91 if (sa_valid & MDS_ATTR_MODE)
92 ia_valid |= ATTR_MODE;
93 if (sa_valid & MDS_ATTR_UID)
95 if (sa_valid & MDS_ATTR_GID)
97 if (sa_valid & MDS_ATTR_SIZE)
98 ia_valid |= ATTR_SIZE;
99 if (sa_valid & MDS_ATTR_ATIME)
100 ia_valid |= ATTR_ATIME;
101 if (sa_valid & MDS_ATTR_MTIME)
102 ia_valid |= ATTR_MTIME;
103 if (sa_valid & MDS_ATTR_CTIME)
104 ia_valid |= ATTR_CTIME;
105 if (sa_valid & MDS_ATTR_ATIME_SET)
106 ia_valid |= ATTR_ATIME_SET;
107 if (sa_valid & MDS_ATTR_MTIME_SET)
108 ia_valid |= ATTR_MTIME_SET;
109 if (sa_valid & MDS_ATTR_FORCE)
110 ia_valid |= ATTR_FORCE;
111 if (sa_valid & MDS_ATTR_ATTR_FLAG)
112 ia_valid |= ATTR_ATTR_FLAG;
113 if (sa_valid & MDS_ATTR_KILL_SUID)
114 ia_valid |= ATTR_KILL_SUID;
115 if (sa_valid & MDS_ATTR_KILL_SGID)
116 ia_valid |= ATTR_KILL_SGID;
117 if (sa_valid & MDS_ATTR_CTIME_SET)
118 ia_valid |= ATTR_CTIME_SET;
119 if (sa_valid & MDS_ATTR_FROM_OPEN)
120 ia_valid |= ATTR_FROM_OPEN;
121 if (sa_valid & MDS_ATTR_BLOCKS)
122 ia_valid |= ATTR_BLOCKS;
123 if (sa_valid & MDS_OPEN_OWNEROVERRIDE)
124 ia_valid |= MDS_OPEN_OWNEROVERRIDE;
129 static int mds_setattr_unpack(struct ptlrpc_request *req, int offset,
130 struct mds_update_record *r)
132 struct iattr *attr = &r->ur_iattr;
133 struct mds_rec_setattr *rec;
136 rec = lustre_swab_reqbuf(req, offset, sizeof(*rec),
137 lustre_swab_mds_rec_setattr);
141 r->ur_uc.luc_fsuid = rec->sa_fsuid;
142 r->ur_uc.luc_fsgid = rec->sa_fsgid;
143 r->ur_uc.luc_cap = rec->sa_cap;
145 r->ur_uc.luc_suppgid1 = rec->sa_suppgid;
146 r->ur_uc.luc_suppgid2 = -1;
148 r->ur_fid1 = &rec->sa_fid;
149 attr->ia_valid = attr_unpack(rec->sa_valid);
150 attr->ia_mode = rec->sa_mode;
151 attr->ia_uid = rec->sa_uid;
152 attr->ia_gid = rec->sa_gid;
153 attr->ia_size = rec->sa_size;
154 LTIME_S(attr->ia_atime) = rec->sa_atime;
155 LTIME_S(attr->ia_mtime) = rec->sa_mtime;
156 LTIME_S(attr->ia_ctime) = rec->sa_ctime;
157 r->ur_flags = rec->sa_attr_flags;
159 lustre_set_req_swabbed(req, offset + 1);
160 r->ur_eadatalen = lustre_msg_buflen(req->rq_reqmsg, offset + 1);
161 if (r->ur_eadatalen) {
162 r->ur_eadata = lustre_msg_buf(req->rq_reqmsg, offset + 1, 0);
163 if (r->ur_eadata == NULL)
166 r->ur_cookielen = lustre_msg_buflen(req->rq_reqmsg, offset + 2);
167 if (r->ur_cookielen) {
168 r->ur_logcookies = lustre_msg_buf(req->rq_reqmsg, offset + 2,0);
169 if (r->ur_eadata == NULL)
172 if (lustre_msg_buflen(req->rq_reqmsg, offset + 3)) {
173 r->ur_dlm = lustre_swab_reqbuf(req, offset + 3,
175 lustre_swab_ldlm_request);
176 if (r->ur_dlm == NULL)
182 static int mds_create_unpack(struct ptlrpc_request *req, int offset,
183 struct mds_update_record *r)
185 struct mds_rec_create *rec;
188 rec = lustre_swab_reqbuf(req, offset, sizeof (*rec),
189 lustre_swab_mds_rec_create);
193 r->ur_uc.luc_fsuid = rec->cr_fsuid;
194 r->ur_uc.luc_fsgid = rec->cr_fsgid;
195 r->ur_uc.luc_cap = rec->cr_cap;
197 r->ur_uc.luc_suppgid1 = rec->cr_suppgid;
198 r->ur_uc.luc_suppgid2 = -1;
200 r->ur_fid1 = &rec->cr_fid;
201 r->ur_fid2 = &rec->cr_replayfid;
202 r->ur_mode = rec->cr_mode;
203 r->ur_rdev = rec->cr_rdev;
204 r->ur_time = rec->cr_time;
205 r->ur_flags = rec->cr_flags;
207 lustre_set_req_swabbed(req, offset + 1);
208 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
209 if (r->ur_name == NULL)
211 r->ur_namelen = lustre_msg_buflen(req->rq_reqmsg, offset + 1);
213 lustre_set_req_swabbed(req, offset + 2);
214 r->ur_tgtlen = lustre_msg_buflen(req->rq_reqmsg, offset + 2);
216 /* NB for now, we only seem to pass NULL terminated symlink
217 * target strings here. If this ever changes, we'll have
218 * to stop checking for a buffer filled completely with a
219 * NULL terminated string here, and make the callers check
220 * depending on what they expect. We should probably stash
221 * it in r->ur_eadata in that case, so it's obvious... -eeb
223 r->ur_tgt = lustre_msg_string(req->rq_reqmsg, offset + 2, 0);
224 if (r->ur_tgt == NULL)
227 if (lustre_msg_buflen(req->rq_reqmsg, offset + 3)) {
228 r->ur_dlm = lustre_swab_reqbuf(req, offset + 3,
230 lustre_swab_ldlm_request);
231 if (r->ur_dlm == NULL)
237 static int mds_link_unpack(struct ptlrpc_request *req, int offset,
238 struct mds_update_record *r)
240 struct mds_rec_link *rec;
243 rec = lustre_swab_reqbuf(req, offset, sizeof (*rec),
244 lustre_swab_mds_rec_link);
248 r->ur_uc.luc_fsuid = rec->lk_fsuid;
249 r->ur_uc.luc_fsgid = rec->lk_fsgid;
250 r->ur_uc.luc_cap = rec->lk_cap;
252 r->ur_uc.luc_suppgid1 = rec->lk_suppgid1;
253 r->ur_uc.luc_suppgid2 = rec->lk_suppgid2;
255 r->ur_fid1 = &rec->lk_fid1;
256 r->ur_fid2 = &rec->lk_fid2;
257 r->ur_time = rec->lk_time;
259 lustre_set_req_swabbed(req, offset + 1);
260 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
261 if (r->ur_name == NULL)
263 r->ur_namelen = lustre_msg_buflen(req->rq_reqmsg, offset + 1);
264 if (lustre_msg_buflen(req->rq_reqmsg, offset + 2)) {
265 r->ur_dlm = lustre_swab_reqbuf(req, offset + 2,
267 lustre_swab_ldlm_request);
268 if (r->ur_dlm == NULL)
274 static int mds_unlink_unpack(struct ptlrpc_request *req, int offset,
275 struct mds_update_record *r)
277 struct mds_rec_unlink *rec;
280 rec = lustre_swab_reqbuf(req, offset, sizeof (*rec),
281 lustre_swab_mds_rec_unlink);
285 r->ur_uc.luc_fsuid = rec->ul_fsuid;
286 r->ur_uc.luc_fsgid = rec->ul_fsgid;
287 r->ur_uc.luc_cap = rec->ul_cap;
289 r->ur_uc.luc_suppgid1 = rec->ul_suppgid;
290 r->ur_uc.luc_suppgid2 = -1;
292 r->ur_mode = rec->ul_mode;
293 r->ur_fid1 = &rec->ul_fid1;
294 r->ur_fid2 = &rec->ul_fid2;
295 r->ur_time = rec->ul_time;
297 lustre_set_req_swabbed(req, offset + 1);
298 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
299 if (r->ur_name == NULL)
301 r->ur_namelen = lustre_msg_buflen(req->rq_reqmsg, offset + 1);
303 if (lustre_msg_buflen(req->rq_reqmsg, offset + 2)) {
304 r->ur_dlm = lustre_swab_reqbuf(req, offset + 2,
306 lustre_swab_ldlm_request);
307 if (r->ur_dlm == NULL)
313 static int mds_rename_unpack(struct ptlrpc_request *req, int offset,
314 struct mds_update_record *r)
316 struct mds_rec_rename *rec;
319 rec = lustre_swab_reqbuf(req, offset, sizeof (*rec),
320 lustre_swab_mds_rec_rename);
324 r->ur_uc.luc_fsuid = rec->rn_fsuid;
325 r->ur_uc.luc_fsgid = rec->rn_fsgid;
326 r->ur_uc.luc_cap = rec->rn_cap;
328 r->ur_uc.luc_suppgid1 = rec->rn_suppgid1;
329 r->ur_uc.luc_suppgid2 = rec->rn_suppgid2;
331 r->ur_fid1 = &rec->rn_fid1;
332 r->ur_fid2 = &rec->rn_fid2;
333 r->ur_time = rec->rn_time;
335 lustre_set_req_swabbed(req, offset + 1);
336 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
337 if (r->ur_name == NULL)
339 r->ur_namelen = lustre_msg_buflen(req->rq_reqmsg, offset + 1);
341 lustre_set_req_swabbed(req, offset + 2);
342 r->ur_tgt = lustre_msg_string(req->rq_reqmsg, offset + 2, 0);
343 if (r->ur_tgt == NULL)
345 r->ur_tgtlen = lustre_msg_buflen(req->rq_reqmsg, offset + 2);
346 if (lustre_msg_buflen(req->rq_reqmsg, offset + 3)) {
347 r->ur_dlm = lustre_swab_reqbuf(req, offset + 3,
349 lustre_swab_ldlm_request);
350 if (r->ur_dlm == NULL)
356 static int mds_open_unpack(struct ptlrpc_request *req, int offset,
357 struct mds_update_record *r)
359 struct mds_rec_create *rec;
362 rec = lustre_swab_reqbuf(req, offset, sizeof(*rec),
363 lustre_swab_mds_rec_create);
367 r->ur_uc.luc_fsuid = rec->cr_fsuid;
368 r->ur_uc.luc_fsgid = rec->cr_fsgid;
369 r->ur_uc.luc_cap = rec->cr_cap;
371 r->ur_uc.luc_suppgid1 = rec->cr_suppgid;
372 r->ur_uc.luc_suppgid2 = -1;
374 r->ur_fid1 = &rec->cr_fid;
375 r->ur_fid2 = &rec->cr_replayfid;
376 r->ur_mode = rec->cr_mode;
377 r->ur_rdev = rec->cr_rdev;
378 r->ur_time = rec->cr_time;
379 r->ur_flags = rec->cr_flags;
381 lustre_set_req_swabbed(req, offset + 1);
382 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
383 if (r->ur_name == NULL)
385 r->ur_namelen = lustre_msg_buflen(req->rq_reqmsg, offset + 1);
387 lustre_set_req_swabbed(req, offset + 2);
388 r->ur_eadatalen = lustre_msg_buflen(req->rq_reqmsg, offset + 2);
389 if (r->ur_eadatalen) {
390 r->ur_eadata = lustre_msg_buf(req->rq_reqmsg, offset + 2, 0);
391 if (r->ur_eadata == NULL)
397 typedef int (*update_unpacker)(struct ptlrpc_request *req, int offset,
398 struct mds_update_record *r);
400 static update_unpacker mds_unpackers[REINT_MAX] = {
401 [REINT_SETATTR] mds_setattr_unpack,
402 [REINT_CREATE] mds_create_unpack,
403 [REINT_LINK] mds_link_unpack,
404 [REINT_UNLINK] mds_unlink_unpack,
405 [REINT_RENAME] mds_rename_unpack,
406 [REINT_OPEN] mds_open_unpack,
409 int mds_update_unpack(struct ptlrpc_request *req, int offset,
410 struct mds_update_record *rec)
412 mds_reint_t opcode, *opcodep;
416 /* NB don't lustre_swab_reqbuf() here. We're just taking a peek
417 * and we want to leave it to the specific unpacker once we've
418 * identified the message type */
419 opcodep = lustre_msg_buf(req->rq_reqmsg, offset, sizeof (*opcodep));
424 if (lustre_msg_swabbed(req->rq_reqmsg))
427 if (opcode >= REINT_MAX || mds_unpackers[opcode] == NULL) {
428 CERROR("Unexpected opcode %d\n", opcode);
432 rec->ur_opcode = opcode;
433 rc = mds_unpackers[opcode](req, offset, rec);
438 int mds_init_ucred(struct lvfs_ucred *ucred, struct ptlrpc_request *req,
441 struct mds_body *body = lustre_msg_buf(req->rq_reqmsg, offset,
444 struct mds_obd *mds = mds_req2mds(req);
448 LASSERT(body != NULL); /* previously verified & swabbed by caller */
451 if (req->rq_uid != LNET_UID_ANY) {
452 /* Non-root local cluster client */
453 LASSERT (req->rq_uid != 0);
454 ucred->luc_fsuid = req->rq_uid;
458 ucred->luc_fsuid = body->fsuid;
459 ucred->luc_fsgid = body->fsgid;
460 ucred->luc_cap = body->capability;
464 ucred->luc_uce = upcall_cache_get_entry(mds->mds_group_hash,
468 if (IS_ERR(ucred->luc_uce)) {
469 rc = PTR_ERR(ucred->luc_uce);
470 ucred->luc_uce = NULL;
476 ucred->luc_fsgid = ucred->luc_uce->ue_primary;
483 void mds_exit_ucred(struct lvfs_ucred *ucred, struct mds_obd *mds)
486 upcall_cache_put_entry(mds->mds_group_hash, ucred->luc_uce);