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 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
38 # include <linux/locks.h> // for wait_on_buffer
40 # include <linux/buffer_head.h> // for wait_on_buffer
42 #include <linux/unistd.h>
44 #include <asm/system.h>
45 #include <asm/uaccess.h>
48 #include <linux/stat.h>
49 #include <asm/uaccess.h>
50 #include <linux/slab.h>
51 #include <asm/segment.h>
53 #include <obd_support.h>
54 #include <lustre_lib.h>
55 #include "mds_internal.h"
57 void mds_pack_inode2fid(struct ll_fid *fid, struct inode *inode)
59 fid->id = inode->i_ino;
60 fid->generation = inode->i_generation;
61 fid->f_type = (S_IFMT & inode->i_mode);
64 /* Note that we can copy all of the fields, just some will not be "valid" */
65 void mds_pack_inode2body(struct mds_body *b, struct inode *inode)
67 b->valid |= OBD_MD_FLID | OBD_MD_FLCTIME | OBD_MD_FLUID |
68 OBD_MD_FLGID | OBD_MD_FLFLAGS | OBD_MD_FLTYPE |
69 OBD_MD_FLMODE | OBD_MD_FLNLINK | OBD_MD_FLGENER |
70 OBD_MD_FLATIME | OBD_MD_FLMTIME; /* bug 2020 */
72 if (!S_ISREG(inode->i_mode))
73 b->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS | OBD_MD_FLATIME |
74 OBD_MD_FLMTIME | OBD_MD_FLRDEV;
76 b->ino = inode->i_ino;
77 b->atime = LTIME_S(inode->i_atime);
78 b->mtime = LTIME_S(inode->i_mtime);
79 b->ctime = LTIME_S(inode->i_ctime);
80 b->mode = inode->i_mode;
81 b->size = i_size_read(inode);
82 b->blocks = inode->i_blocks;
83 b->uid = inode->i_uid;
84 b->gid = inode->i_gid;
85 b->flags = ll_inode_to_ext_flags(b->flags, inode->i_flags);
86 b->rdev = inode->i_rdev;
87 /* Return the correct link count for orphan inodes */
88 b->nlink = mds_inode_is_orphan(inode) ? 0 : inode->i_nlink;
89 b->generation = inode->i_generation;
94 static int mds_setattr_unpack(struct ptlrpc_request *req, int offset,
95 struct mds_update_record *r)
97 struct iattr *attr = &r->ur_iattr;
98 struct mds_rec_setattr *rec;
101 rec = lustre_swab_reqbuf(req, offset, sizeof(*rec),
102 lustre_swab_mds_rec_setattr);
106 r->ur_uc.luc_fsuid = rec->sa_fsuid;
107 r->ur_uc.luc_fsgid = rec->sa_fsgid;
108 r->ur_uc.luc_cap = rec->sa_cap;
110 r->ur_uc.luc_suppgid1 = rec->sa_suppgid;
111 r->ur_uc.luc_suppgid2 = -1;
113 r->ur_fid1 = &rec->sa_fid;
114 attr->ia_valid = rec->sa_valid;
115 attr->ia_mode = rec->sa_mode;
116 attr->ia_uid = rec->sa_uid;
117 attr->ia_gid = rec->sa_gid;
118 attr->ia_size = rec->sa_size;
119 LTIME_S(attr->ia_atime) = rec->sa_atime;
120 LTIME_S(attr->ia_mtime) = rec->sa_mtime;
121 LTIME_S(attr->ia_ctime) = rec->sa_ctime;
122 r->ur_flags = rec->sa_attr_flags;
124 LASSERT_REQSWAB (req, offset + 1);
125 r->ur_eadatalen = lustre_msg_buflen(req->rq_reqmsg, offset + 1);
126 if (r->ur_eadatalen) {
127 r->ur_eadata = lustre_msg_buf(req->rq_reqmsg, offset + 1, 0);
128 if (r->ur_eadata == NULL)
131 r->ur_cookielen = lustre_msg_buflen(req->rq_reqmsg, offset + 2);
132 if (r->ur_cookielen) {
133 r->ur_logcookies = lustre_msg_buf(req->rq_reqmsg, offset + 2,0);
134 if (r->ur_eadata == NULL)
137 if (lustre_msg_buflen(req->rq_reqmsg, offset + 3)) {
138 r->ur_dlm = lustre_swab_reqbuf(req, offset + 3,
140 lustre_swab_ldlm_request);
141 if (r->ur_dlm == NULL)
147 static int mds_create_unpack(struct ptlrpc_request *req, int offset,
148 struct mds_update_record *r)
150 struct mds_rec_create *rec;
153 rec = lustre_swab_reqbuf(req, offset, sizeof (*rec),
154 lustre_swab_mds_rec_create);
158 r->ur_uc.luc_fsuid = rec->cr_fsuid;
159 r->ur_uc.luc_fsgid = rec->cr_fsgid;
160 r->ur_uc.luc_cap = rec->cr_cap;
162 r->ur_uc.luc_suppgid1 = rec->cr_suppgid;
163 r->ur_uc.luc_suppgid2 = -1;
165 r->ur_fid1 = &rec->cr_fid;
166 r->ur_fid2 = &rec->cr_replayfid;
167 r->ur_mode = rec->cr_mode;
168 r->ur_rdev = rec->cr_rdev;
169 r->ur_time = rec->cr_time;
170 r->ur_flags = rec->cr_flags;
172 LASSERT_REQSWAB(req, offset + 1);
173 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
174 if (r->ur_name == NULL)
176 r->ur_namelen = lustre_msg_buflen(req->rq_reqmsg, offset + 1);
178 LASSERT_REQSWAB(req, offset + 2);
179 r->ur_tgtlen = lustre_msg_buflen(req->rq_reqmsg, offset + 2);
181 /* NB for now, we only seem to pass NULL terminated symlink
182 * target strings here. If this ever changes, we'll have
183 * to stop checking for a buffer filled completely with a
184 * NULL terminated string here, and make the callers check
185 * depending on what they expect. We should probably stash
186 * it in r->ur_eadata in that case, so it's obvious... -eeb
188 r->ur_tgt = lustre_msg_string(req->rq_reqmsg, offset + 2, 0);
189 if (r->ur_tgt == NULL)
192 if (lustre_msg_buflen(req->rq_reqmsg, offset + 3)) {
193 r->ur_dlm = lustre_swab_reqbuf(req, offset + 3,
195 lustre_swab_ldlm_request);
196 if (r->ur_dlm == NULL)
202 static int mds_link_unpack(struct ptlrpc_request *req, int offset,
203 struct mds_update_record *r)
205 struct mds_rec_link *rec;
208 rec = lustre_swab_reqbuf(req, offset, sizeof (*rec),
209 lustre_swab_mds_rec_link);
213 r->ur_uc.luc_fsuid = rec->lk_fsuid;
214 r->ur_uc.luc_fsgid = rec->lk_fsgid;
215 r->ur_uc.luc_cap = rec->lk_cap;
217 r->ur_uc.luc_suppgid1 = rec->lk_suppgid1;
218 r->ur_uc.luc_suppgid2 = rec->lk_suppgid2;
220 r->ur_fid1 = &rec->lk_fid1;
221 r->ur_fid2 = &rec->lk_fid2;
222 r->ur_time = rec->lk_time;
224 LASSERT_REQSWAB(req, offset + 1);
225 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
226 if (r->ur_name == NULL)
228 r->ur_namelen = lustre_msg_buflen(req->rq_reqmsg, offset + 1);
229 if (lustre_msg_buflen(req->rq_reqmsg, offset + 2)) {
230 r->ur_dlm = lustre_swab_reqbuf(req, offset + 2,
232 lustre_swab_ldlm_request);
233 if (r->ur_dlm == NULL)
239 static int mds_unlink_unpack(struct ptlrpc_request *req, int offset,
240 struct mds_update_record *r)
242 struct mds_rec_unlink *rec;
245 rec = lustre_swab_reqbuf(req, offset, sizeof (*rec),
246 lustre_swab_mds_rec_unlink);
250 r->ur_uc.luc_fsuid = rec->ul_fsuid;
251 r->ur_uc.luc_fsgid = rec->ul_fsgid;
252 r->ur_uc.luc_cap = rec->ul_cap;
254 r->ur_uc.luc_suppgid1 = rec->ul_suppgid;
255 r->ur_uc.luc_suppgid2 = -1;
257 r->ur_mode = rec->ul_mode;
258 r->ur_fid1 = &rec->ul_fid1;
259 r->ur_fid2 = &rec->ul_fid2;
260 r->ur_time = rec->ul_time;
262 LASSERT_REQSWAB(req, offset + 1);
263 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
264 if (r->ur_name == NULL)
266 r->ur_namelen = lustre_msg_buflen(req->rq_reqmsg, offset + 1);
268 if (lustre_msg_buflen(req->rq_reqmsg, offset + 2)) {
269 r->ur_dlm = lustre_swab_reqbuf(req, offset + 2,
271 lustre_swab_ldlm_request);
272 if (r->ur_dlm == NULL)
278 static int mds_rename_unpack(struct ptlrpc_request *req, int offset,
279 struct mds_update_record *r)
281 struct mds_rec_rename *rec;
284 rec = lustre_swab_reqbuf(req, offset, sizeof (*rec),
285 lustre_swab_mds_rec_rename);
289 r->ur_uc.luc_fsuid = rec->rn_fsuid;
290 r->ur_uc.luc_fsgid = rec->rn_fsgid;
291 r->ur_uc.luc_cap = rec->rn_cap;
293 r->ur_uc.luc_suppgid1 = rec->rn_suppgid1;
294 r->ur_uc.luc_suppgid2 = rec->rn_suppgid2;
296 r->ur_fid1 = &rec->rn_fid1;
297 r->ur_fid2 = &rec->rn_fid2;
298 r->ur_time = rec->rn_time;
300 LASSERT_REQSWAB (req, offset + 1);
301 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
302 if (r->ur_name == NULL)
304 r->ur_namelen = lustre_msg_buflen(req->rq_reqmsg, offset + 1);
306 LASSERT_REQSWAB (req, offset + 2);
307 r->ur_tgt = lustre_msg_string(req->rq_reqmsg, offset + 2, 0);
308 if (r->ur_tgt == NULL)
310 r->ur_tgtlen = lustre_msg_buflen(req->rq_reqmsg, offset + 2);
311 if (lustre_msg_buflen(req->rq_reqmsg, offset + 3)) {
312 r->ur_dlm = lustre_swab_reqbuf(req, offset + 3,
314 lustre_swab_ldlm_request);
315 if (r->ur_dlm == NULL)
321 static int mds_open_unpack(struct ptlrpc_request *req, int offset,
322 struct mds_update_record *r)
324 struct mds_rec_create *rec;
327 rec = lustre_swab_reqbuf(req, offset, sizeof(*rec),
328 lustre_swab_mds_rec_create);
332 r->ur_uc.luc_fsuid = rec->cr_fsuid;
333 r->ur_uc.luc_fsgid = rec->cr_fsgid;
334 r->ur_uc.luc_cap = rec->cr_cap;
336 r->ur_uc.luc_suppgid1 = rec->cr_suppgid;
337 r->ur_uc.luc_suppgid2 = -1;
339 r->ur_fid1 = &rec->cr_fid;
340 r->ur_fid2 = &rec->cr_replayfid;
341 r->ur_mode = rec->cr_mode;
342 r->ur_rdev = rec->cr_rdev;
343 r->ur_time = rec->cr_time;
344 r->ur_flags = rec->cr_flags;
346 LASSERT_REQSWAB(req, offset + 1);
347 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
348 if (r->ur_name == NULL)
350 r->ur_namelen = lustre_msg_buflen(req->rq_reqmsg, offset + 1);
352 LASSERT_REQSWAB(req, offset + 2);
353 r->ur_eadatalen = lustre_msg_buflen(req->rq_reqmsg, offset + 2);
354 if (r->ur_eadatalen) {
355 r->ur_eadata = lustre_msg_buf(req->rq_reqmsg, offset + 2, 0);
356 if (r->ur_eadata == NULL)
362 typedef int (*update_unpacker)(struct ptlrpc_request *req, int offset,
363 struct mds_update_record *r);
365 static update_unpacker mds_unpackers[REINT_MAX] = {
366 [REINT_SETATTR] mds_setattr_unpack,
367 [REINT_CREATE] mds_create_unpack,
368 [REINT_LINK] mds_link_unpack,
369 [REINT_UNLINK] mds_unlink_unpack,
370 [REINT_RENAME] mds_rename_unpack,
371 [REINT_OPEN] mds_open_unpack,
374 int mds_update_unpack(struct ptlrpc_request *req, int offset,
375 struct mds_update_record *rec)
377 mds_reint_t opcode, *opcodep;
381 /* NB don't lustre_swab_reqbuf() here. We're just taking a peek
382 * and we want to leave it to the specific unpacker once we've
383 * identified the message type */
384 opcodep = lustre_msg_buf(req->rq_reqmsg, offset, sizeof (*opcodep));
389 if (lustre_msg_swabbed(req->rq_reqmsg))
392 if (opcode >= REINT_MAX || mds_unpackers[opcode] == NULL) {
393 CERROR("Unexpected opcode %d\n", opcode);
397 rec->ur_opcode = opcode;
398 rc = mds_unpackers[opcode](req, offset, rec);
403 int mds_init_ucred(struct lvfs_ucred *ucred, struct ptlrpc_request *req,
406 struct mds_body *body = lustre_msg_buf(req->rq_reqmsg, offset,
409 struct mds_obd *mds = mds_req2mds(req);
413 LASSERT(body != NULL); /* previously verified & swabbed by caller */
416 if (req->rq_uid != LNET_UID_ANY) {
417 /* Non-root local cluster client */
418 LASSERT (req->rq_uid != 0);
419 ucred->luc_fsuid = req->rq_uid;
423 ucred->luc_fsuid = body->fsuid;
424 ucred->luc_fsgid = body->fsgid;
425 ucred->luc_cap = body->capability;
429 ucred->luc_uce = upcall_cache_get_entry(mds->mds_group_hash,
433 if (IS_ERR(ucred->luc_uce)) {
434 rc = PTR_ERR(ucred->luc_uce);
435 ucred->luc_uce = NULL;
441 ucred->luc_fsgid = ucred->luc_uce->ue_primary;
448 void mds_exit_ucred(struct lvfs_ucred *ucred, struct mds_obd *mds)
451 upcall_cache_put_entry(mds->mds_group_hash, ucred->luc_uce);