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 Lustre, http://www.lustre.org.
8 * Lustre is free software; you can redistribute it and/or
9 * modify it under the terms of version 2 of the GNU General Public
10 * License as published by the Free Software Foundation.
12 * Lustre is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Lustre; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 #define DEBUG_SUBSYSTEM S_MDS
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 #include <linux/obd_support.h>
49 #include <linux/lustre_lib.h>
50 #include <linux/lustre_mds.h>
52 void mds_pack_inode2fid(struct obd_device *obd, struct ll_fid *fid,
55 fid->id = inode->i_ino;
56 fid->generation = inode->i_generation;
57 fid->f_type = (S_IFMT & inode->i_mode);
58 fid->mds = obd->u.mds.mds_num;
61 /* Note that we can copy all of the fields, just some will not be "valid" */
62 void mds_pack_inode2body(struct obd_device *obd, struct mds_body *b,
65 b->valid |= OBD_MD_FLID | OBD_MD_FLCTIME | OBD_MD_FLUID |
66 OBD_MD_FLGID | OBD_MD_FLFLAGS | OBD_MD_FLTYPE |
67 OBD_MD_FLMODE | OBD_MD_FLNLINK | OBD_MD_FLGENER |
68 OBD_MD_FLATIME | OBD_MD_FLMTIME; /* bug 2020 */
70 if (!S_ISREG(inode->i_mode))
71 b->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS | OBD_MD_FLATIME |
72 OBD_MD_FLMTIME | OBD_MD_FLRDEV;
74 b->ino = inode->i_ino;
75 b->atime = LTIME_S(inode->i_atime);
76 b->mtime = LTIME_S(inode->i_mtime);
77 b->ctime = LTIME_S(inode->i_ctime);
78 b->mode = inode->i_mode;
79 b->size = inode->i_size;
80 b->blocks = inode->i_blocks;
81 b->uid = inode->i_uid;
82 b->gid = inode->i_gid;
83 b->flags = inode->i_flags;
84 b->rdev = inode->i_rdev;
85 /* Return the correct link count for orphan inodes */
86 if (mds_inode_is_orphan(inode)) {
88 } else if (S_ISDIR(inode->i_mode)) {
91 b->nlink = inode->i_nlink;
93 b->generation = inode->i_generation;
95 b->mds = obd->u.mds.mds_num;
99 static int mds_setattr_unpack(struct ptlrpc_request *req, int offset,
100 struct mds_update_record *r)
102 struct iattr *attr = &r->ur_iattr;
103 struct mds_rec_setattr *rec;
106 rec = lustre_swab_reqbuf(req, offset, sizeof(*rec),
107 lustre_swab_mds_rec_setattr);
111 r->_ur_fsuid = rec->sa_fsuid;
112 r->_ur_fsgid = rec->sa_fsgid;
113 r->_ur_cap = rec->sa_cap;
114 r->_ur_suppgid1 = rec->sa_suppgid;
115 r->_ur_suppgid2 = -1;
116 r->ur_fid1 = &rec->sa_fid;
117 attr->ia_valid = rec->sa_valid;
118 attr->ia_mode = rec->sa_mode;
119 attr->ia_uid = rec->sa_uid;
120 attr->ia_gid = rec->sa_gid;
121 attr->ia_size = rec->sa_size;
122 LTIME_S(attr->ia_atime) = rec->sa_atime;
123 LTIME_S(attr->ia_mtime) = rec->sa_mtime;
124 LTIME_S(attr->ia_ctime) = rec->sa_ctime;
125 attr->ia_attr_flags = rec->sa_attr_flags;
127 LASSERT_REQSWAB (req, offset + 1);
128 if (req->rq_reqmsg->bufcount > offset + 1) {
129 r->ur_eadata = lustre_msg_buf (req->rq_reqmsg,
131 if (r->ur_eadata == NULL)
133 r->ur_eadatalen = req->rq_reqmsg->buflens[offset + 1];
136 if (req->rq_reqmsg->bufcount > offset + 2) {
137 r->ur_logcookies = lustre_msg_buf(req->rq_reqmsg, offset + 2,0);
138 if (r->ur_eadata == NULL)
141 r->ur_cookielen = req->rq_reqmsg->buflens[offset + 2];
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_fsuid = rec->cr_fsuid;
159 r->_ur_fsgid = rec->cr_fsgid;
160 r->_ur_cap = rec->cr_cap;
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;
167 r->_ur_suppgid1 = rec->cr_suppgid;
168 r->_ur_suppgid2 = -1;
170 LASSERT_REQSWAB (req, offset + 1);
171 r->ur_name = lustre_msg_string (req->rq_reqmsg, offset + 1, 0);
172 if (r->ur_name == NULL)
174 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
176 LASSERT_REQSWAB (req, offset + 2);
177 if (req->rq_reqmsg->bufcount > offset + 2) {
178 if (S_ISLNK(r->ur_mode)) {
179 r->ur_tgt = lustre_msg_string(req->rq_reqmsg,
181 if (r->ur_tgt == NULL)
183 r->ur_tgtlen = req->rq_reqmsg->buflens[offset + 2];
184 } else if (S_ISDIR(r->ur_mode)) {
185 /* Stripe info for mkdir - just a 16bit integer */
186 if (req->rq_reqmsg->buflens[offset + 2] != 2) {
187 CERROR("mkdir stripe info does not match "
188 "expected size %d vs 2\n",
189 req->rq_reqmsg->buflens[offset + 2]);
192 r->ur_eadata = lustre_swab_buf (req->rq_reqmsg,
193 offset + 2, 2, __swab16s);
194 r->ur_eadatalen = req->rq_reqmsg->buflens[offset + 2];
196 /* Hm, no other users so far? */
203 static int mds_link_unpack(struct ptlrpc_request *req, int offset,
204 struct mds_update_record *r)
206 struct mds_rec_link *rec;
209 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
210 lustre_swab_mds_rec_link);
214 r->_ur_fsuid = rec->lk_fsuid;
215 r->_ur_fsgid = rec->lk_fsgid;
216 r->_ur_cap = rec->lk_cap;
217 r->_ur_suppgid1 = rec->lk_suppgid1;
218 r->_ur_suppgid2 = rec->lk_suppgid2;
219 r->ur_fid1 = &rec->lk_fid1;
220 r->ur_fid2 = &rec->lk_fid2;
221 r->ur_time = rec->lk_time;
223 LASSERT_REQSWAB (req, offset + 1);
224 r->ur_name = lustre_msg_string (req->rq_reqmsg, offset + 1, 0);
225 if (r->ur_name == NULL)
227 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
231 static int mds_unlink_unpack(struct ptlrpc_request *req, int offset,
232 struct mds_update_record *r)
234 struct mds_rec_unlink *rec;
237 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
238 lustre_swab_mds_rec_unlink);
242 r->_ur_fsuid = rec->ul_fsuid;
243 r->_ur_fsgid = rec->ul_fsgid;
244 r->_ur_cap = rec->ul_cap;
245 r->ur_mode = rec->ul_mode;
246 r->_ur_suppgid1 = rec->ul_suppgid;
247 r->_ur_suppgid2 = -1;
248 r->ur_fid1 = &rec->ul_fid1;
249 r->ur_fid2 = &rec->ul_fid2;
250 r->ur_time = rec->ul_time;
252 LASSERT_REQSWAB (req, offset + 1);
253 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
254 if (r->ur_name == NULL)
256 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
260 static int mds_rename_unpack(struct ptlrpc_request *req, int offset,
261 struct mds_update_record *r)
263 struct mds_rec_rename *rec;
266 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
267 lustre_swab_mds_rec_unlink);
271 r->_ur_fsuid = rec->rn_fsuid;
272 r->_ur_fsgid = rec->rn_fsgid;
273 r->_ur_cap = rec->rn_cap;
274 r->_ur_suppgid1 = rec->rn_suppgid1;
275 r->_ur_suppgid2 = rec->rn_suppgid2;
276 r->ur_fid1 = &rec->rn_fid1;
277 r->ur_fid2 = &rec->rn_fid2;
278 r->ur_time = rec->rn_time;
280 LASSERT_REQSWAB (req, offset + 1);
281 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
282 if (r->ur_name == NULL)
284 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
286 LASSERT_REQSWAB (req, offset + 2);
287 r->ur_tgt = lustre_msg_string(req->rq_reqmsg, offset + 2, 0);
288 if (r->ur_tgt == NULL)
290 r->ur_tgtlen = req->rq_reqmsg->buflens[offset + 2];
294 static int mds_open_unpack(struct ptlrpc_request *req, int offset,
295 struct mds_update_record *r)
297 struct mds_rec_create *rec;
300 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
301 lustre_swab_mds_rec_create);
305 r->_ur_fsuid = rec->cr_fsuid;
306 r->_ur_fsgid = rec->cr_fsgid;
307 r->_ur_cap = rec->cr_cap;
308 r->ur_fid1 = &rec->cr_fid;
309 r->ur_fid2 = &rec->cr_replayfid;
310 r->ur_mode = rec->cr_mode;
311 r->ur_rdev = rec->cr_rdev;
312 r->ur_time = rec->cr_time;
313 r->ur_flags = rec->cr_flags;
314 r->_ur_suppgid1 = rec->cr_suppgid;
315 r->_ur_suppgid2 = -1;
317 LASSERT_REQSWAB (req, offset + 1);
318 r->ur_name = lustre_msg_string (req->rq_reqmsg, offset + 1, 0);
319 if (r->ur_name == NULL)
321 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
323 LASSERT_REQSWAB (req, offset + 2);
324 if (req->rq_reqmsg->bufcount > offset + 2) {
325 r->ur_eadata = lustre_msg_buf(req->rq_reqmsg, offset + 2, 0);
326 if (r->ur_eadata == NULL)
328 r->ur_eadatalen = req->rq_reqmsg->buflens[offset + 2];
333 typedef int (*update_unpacker)(struct ptlrpc_request *req, int offset,
334 struct mds_update_record *r);
336 static update_unpacker mds_unpackers[REINT_MAX + 1] = {
337 [REINT_SETATTR] mds_setattr_unpack,
338 [REINT_CREATE] mds_create_unpack,
339 [REINT_LINK] mds_link_unpack,
340 [REINT_UNLINK] mds_unlink_unpack,
341 [REINT_RENAME] mds_rename_unpack,
342 [REINT_OPEN] mds_open_unpack,
345 int mds_update_unpack(struct ptlrpc_request *req, int offset,
346 struct mds_update_record *rec)
353 /* NB don't lustre_swab_reqbuf() here. We're just taking a peek
354 * and we want to leave it to the specific unpacker once we've
355 * identified the message type */
356 opcodep = lustre_msg_buf (req->rq_reqmsg, offset, sizeof (*opcodep));
361 if (lustre_msg_swabbed (req->rq_reqmsg))
364 if (opcode > REINT_MAX ||
365 mds_unpackers[opcode] == NULL) {
366 CERROR ("Unexpected opcode %d\n", opcode);
370 rec->ur_opcode = opcode;
371 rc = mds_unpackers[opcode](req, offset, rec);