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 #ifdef HAVE_KERNEL_CONFIG_H
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 = inode->i_size;
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;
109 r->ur_uc.luc_suppgid1 = rec->sa_suppgid;
110 r->ur_uc.luc_suppgid2 = -1;
111 r->ur_fid1 = &rec->sa_fid;
112 attr->ia_valid = rec->sa_valid;
113 attr->ia_mode = rec->sa_mode;
114 attr->ia_uid = rec->sa_uid;
115 attr->ia_gid = rec->sa_gid;
116 attr->ia_size = rec->sa_size;
117 LTIME_S(attr->ia_atime) = rec->sa_atime;
118 LTIME_S(attr->ia_mtime) = rec->sa_mtime;
119 LTIME_S(attr->ia_ctime) = rec->sa_ctime;
120 r->ur_flags = rec->sa_attr_flags;
122 LASSERT_REQSWAB (req, offset + 1);
123 r->ur_eadatalen = lustre_msg_buflen(req->rq_reqmsg, offset + 1);
124 if (r->ur_eadatalen) {
125 r->ur_eadata = lustre_msg_buf(req->rq_reqmsg, offset + 1, 0);
126 if (r->ur_eadata == NULL)
129 r->ur_cookielen = lustre_msg_buflen(req->rq_reqmsg, offset + 2);
130 if (r->ur_cookielen) {
131 r->ur_logcookies = lustre_msg_buf(req->rq_reqmsg, offset + 2,0);
132 if (r->ur_eadata == NULL)
135 if (lustre_msg_buflen(req->rq_reqmsg, offset + 3)) {
136 r->ur_dlm = lustre_swab_reqbuf(req, offset + 3,
138 lustre_swab_ldlm_request);
139 if (r->ur_dlm == NULL)
145 static int mds_create_unpack(struct ptlrpc_request *req, int offset,
146 struct mds_update_record *r)
148 struct mds_rec_create *rec;
151 rec = lustre_swab_reqbuf(req, offset, sizeof (*rec),
152 lustre_swab_mds_rec_create);
156 r->ur_uc.luc_fsuid = rec->cr_fsuid;
157 r->ur_uc.luc_fsgid = rec->cr_fsgid;
158 r->ur_uc.luc_cap = rec->cr_cap;
159 r->ur_uc.luc_suppgid1 = rec->cr_suppgid;
160 r->ur_uc.luc_suppgid2 = -1;
161 r->ur_fid1 = &rec->cr_fid;
162 r->ur_fid2 = &rec->cr_replayfid;
163 r->ur_mode = rec->cr_mode;
164 r->ur_rdev = rec->cr_rdev;
165 r->ur_time = rec->cr_time;
166 r->ur_flags = rec->cr_flags;
168 LASSERT_REQSWAB(req, offset + 1);
169 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
170 if (r->ur_name == NULL)
172 r->ur_namelen = lustre_msg_buflen(req->rq_reqmsg, offset + 1);
174 LASSERT_REQSWAB(req, offset + 2);
175 r->ur_tgtlen = lustre_msg_buflen(req->rq_reqmsg, offset + 2);
177 /* NB for now, we only seem to pass NULL terminated symlink
178 * target strings here. If this ever changes, we'll have
179 * to stop checking for a buffer filled completely with a
180 * NULL terminated string here, and make the callers check
181 * depending on what they expect. We should probably stash
182 * it in r->ur_eadata in that case, so it's obvious... -eeb
184 r->ur_tgt = lustre_msg_string(req->rq_reqmsg, offset + 2, 0);
185 if (r->ur_tgt == NULL)
188 if (lustre_msg_buflen(req->rq_reqmsg, offset + 3)) {
189 r->ur_dlm = lustre_swab_reqbuf(req, offset + 3,
191 lustre_swab_ldlm_request);
192 if (r->ur_dlm == NULL)
198 static int mds_link_unpack(struct ptlrpc_request *req, int offset,
199 struct mds_update_record *r)
201 struct mds_rec_link *rec;
204 rec = lustre_swab_reqbuf(req, offset, sizeof (*rec),
205 lustre_swab_mds_rec_link);
209 r->ur_uc.luc_fsuid = rec->lk_fsuid;
210 r->ur_uc.luc_fsgid = rec->lk_fsgid;
211 r->ur_uc.luc_cap = rec->lk_cap;
212 r->ur_uc.luc_suppgid1 = rec->lk_suppgid1;
213 r->ur_uc.luc_suppgid2 = rec->lk_suppgid2;
214 r->ur_fid1 = &rec->lk_fid1;
215 r->ur_fid2 = &rec->lk_fid2;
216 r->ur_time = rec->lk_time;
218 LASSERT_REQSWAB(req, offset + 1);
219 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
220 if (r->ur_name == NULL)
222 r->ur_namelen = lustre_msg_buflen(req->rq_reqmsg, offset + 1);
223 if (lustre_msg_buflen(req->rq_reqmsg, offset + 2)) {
224 r->ur_dlm = lustre_swab_reqbuf(req, offset + 2,
226 lustre_swab_ldlm_request);
227 if (r->ur_dlm == NULL)
233 static int mds_unlink_unpack(struct ptlrpc_request *req, int offset,
234 struct mds_update_record *r)
236 struct mds_rec_unlink *rec;
239 rec = lustre_swab_reqbuf(req, offset, sizeof (*rec),
240 lustre_swab_mds_rec_unlink);
244 r->ur_uc.luc_fsuid = rec->ul_fsuid;
245 r->ur_uc.luc_fsgid = rec->ul_fsgid;
246 r->ur_uc.luc_cap = rec->ul_cap;
247 r->ur_uc.luc_suppgid1 = rec->ul_suppgid;
248 r->ur_uc.luc_suppgid2 = -1;
249 r->ur_mode = rec->ul_mode;
250 r->ur_fid1 = &rec->ul_fid1;
251 r->ur_fid2 = &rec->ul_fid2;
252 r->ur_time = rec->ul_time;
254 LASSERT_REQSWAB(req, offset + 1);
255 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
256 if (r->ur_name == NULL)
258 r->ur_namelen = lustre_msg_buflen(req->rq_reqmsg, offset + 1);
260 if (lustre_msg_buflen(req->rq_reqmsg, offset + 2)) {
261 r->ur_dlm = lustre_swab_reqbuf(req, offset + 2,
263 lustre_swab_ldlm_request);
264 if (r->ur_dlm == NULL)
270 static int mds_rename_unpack(struct ptlrpc_request *req, int offset,
271 struct mds_update_record *r)
273 struct mds_rec_rename *rec;
276 rec = lustre_swab_reqbuf(req, offset, sizeof (*rec),
277 lustre_swab_mds_rec_rename);
281 r->ur_uc.luc_fsuid = rec->rn_fsuid;
282 r->ur_uc.luc_fsgid = rec->rn_fsgid;
283 r->ur_uc.luc_cap = rec->rn_cap;
284 r->ur_uc.luc_suppgid1 = rec->rn_suppgid1;
285 r->ur_uc.luc_suppgid2 = rec->rn_suppgid2;
286 r->ur_fid1 = &rec->rn_fid1;
287 r->ur_fid2 = &rec->rn_fid2;
288 r->ur_time = rec->rn_time;
290 LASSERT_REQSWAB (req, offset + 1);
291 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
292 if (r->ur_name == NULL)
294 r->ur_namelen = lustre_msg_buflen(req->rq_reqmsg, offset + 1);
296 LASSERT_REQSWAB (req, offset + 2);
297 r->ur_tgt = lustre_msg_string(req->rq_reqmsg, offset + 2, 0);
298 if (r->ur_tgt == NULL)
300 r->ur_tgtlen = lustre_msg_buflen(req->rq_reqmsg, offset + 2);
301 if (lustre_msg_buflen(req->rq_reqmsg, offset + 3)) {
302 r->ur_dlm = lustre_swab_reqbuf(req, offset + 3,
304 lustre_swab_ldlm_request);
305 if (r->ur_dlm == NULL)
311 static int mds_open_unpack(struct ptlrpc_request *req, int offset,
312 struct mds_update_record *r)
314 struct mds_rec_create *rec;
317 rec = lustre_swab_reqbuf(req, offset, sizeof(*rec),
318 lustre_swab_mds_rec_create);
322 r->ur_uc.luc_fsuid = rec->cr_fsuid;
323 r->ur_uc.luc_fsgid = rec->cr_fsgid;
324 r->ur_uc.luc_cap = rec->cr_cap;
325 r->ur_uc.luc_suppgid1 = rec->cr_suppgid;
326 r->ur_uc.luc_suppgid2 = -1;
327 r->ur_fid1 = &rec->cr_fid;
328 r->ur_fid2 = &rec->cr_replayfid;
329 r->ur_mode = rec->cr_mode;
330 r->ur_rdev = rec->cr_rdev;
331 r->ur_time = rec->cr_time;
332 r->ur_flags = rec->cr_flags;
334 LASSERT_REQSWAB(req, offset + 1);
335 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
336 if (r->ur_name == NULL)
338 r->ur_namelen = lustre_msg_buflen(req->rq_reqmsg, offset + 1);
340 LASSERT_REQSWAB(req, offset + 2);
341 r->ur_eadatalen = lustre_msg_buflen(req->rq_reqmsg, offset + 2);
342 if (r->ur_eadatalen) {
343 r->ur_eadata = lustre_msg_buf(req->rq_reqmsg, offset + 2, 0);
344 if (r->ur_eadata == NULL)
350 typedef int (*update_unpacker)(struct ptlrpc_request *req, int offset,
351 struct mds_update_record *r);
353 static update_unpacker mds_unpackers[REINT_MAX] = {
354 [REINT_SETATTR] mds_setattr_unpack,
355 [REINT_CREATE] mds_create_unpack,
356 [REINT_LINK] mds_link_unpack,
357 [REINT_UNLINK] mds_unlink_unpack,
358 [REINT_RENAME] mds_rename_unpack,
359 [REINT_OPEN] mds_open_unpack,
362 int mds_update_unpack(struct ptlrpc_request *req, int offset,
363 struct mds_update_record *rec)
365 mds_reint_t opcode, *opcodep;
369 /* NB don't lustre_swab_reqbuf() here. We're just taking a peek
370 * and we want to leave it to the specific unpacker once we've
371 * identified the message type */
372 opcodep = lustre_msg_buf(req->rq_reqmsg, offset, sizeof (*opcodep));
377 if (lustre_msg_swabbed(req->rq_reqmsg))
380 if (opcode >= REINT_MAX || mds_unpackers[opcode] == NULL) {
381 CERROR("Unexpected opcode %d\n", opcode);
385 rec->ur_opcode = opcode;
386 rc = mds_unpackers[opcode](req, offset, rec);
391 int mds_init_ucred(struct lvfs_ucred *ucred, struct ptlrpc_request *req,
394 struct mds_body *body = lustre_msg_buf(req->rq_reqmsg, offset,
396 struct mds_obd *mds = mds_req2mds(req);
399 LASSERT(body != NULL); /* previously verified & swabbed by caller */
402 if (req->rq_uid != LNET_UID_ANY) {
403 /* Non-root local cluster client */
404 LASSERT (req->rq_uid != 0);
405 ucred->luc_fsuid = req->rq_uid;
409 ucred->luc_fsuid = body->fsuid;
410 ucred->luc_fsgid = body->fsgid;
411 ucred->luc_cap = body->capability;
414 ucred->luc_uce = upcall_cache_get_entry(mds->mds_group_hash,
418 if (IS_ERR(ucred->luc_uce)) {
419 rc = PTR_ERR(ucred->luc_uce);
420 ucred->luc_uce = NULL;
426 ucred->luc_fsgid = ucred->luc_uce->ue_primary;
432 void mds_exit_ucred(struct lvfs_ucred *ucred, struct mds_obd *mds)
434 upcall_cache_put_entry(mds->mds_group_hash, ucred->luc_uce);