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 #include <linux/lustre_smfs.h>
53 #include <linux/lustre_snap.h>
55 void mds_pack_dentry2fid(struct ll_fid *fid, struct dentry *dentry)
57 fid->id = dentry->d_inum;
58 fid->generation = dentry->d_generation;
59 fid->mds = dentry->d_mdsnum;
62 void mds_pack_dentry2body(struct mds_body *b, struct dentry *dentry)
64 b->valid |= OBD_MD_FLID | OBD_MD_FLGENER;
65 b->ino = dentry->d_inum;
66 b->generation = dentry->d_generation;
67 b->mds = dentry->d_mdsnum;
70 void mds_pack_inode2fid(struct obd_device *obd, struct ll_fid *fid,
73 fid->id = inode->i_ino;
74 fid->generation = inode->i_generation;
75 fid->f_type = (S_IFMT & inode->i_mode);
76 fid->mds = obd->u.mds.mds_num;
79 /* Note that we can copy all of the fields, just some will not be "valid" */
80 void mds_pack_inode2body(struct obd_device *obd, struct mds_body *b,
83 b->valid |= OBD_MD_FLID | OBD_MD_FLCTIME | OBD_MD_FLUID |
84 OBD_MD_FLGID | OBD_MD_FLFLAGS | OBD_MD_FLTYPE |
85 OBD_MD_FLMODE | OBD_MD_FLNLINK | OBD_MD_FLGENER |
86 OBD_MD_FLATIME | OBD_MD_FLMTIME; /* bug 2020 */
88 if (!S_ISREG(inode->i_mode))
89 b->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS | OBD_MD_FLATIME |
90 OBD_MD_FLMTIME | OBD_MD_FLRDEV;
92 b->ino = inode->i_ino;
93 b->atime = LTIME_S(inode->i_atime);
94 b->mtime = LTIME_S(inode->i_mtime);
95 b->ctime = LTIME_S(inode->i_ctime);
96 b->mode = inode->i_mode;
97 b->size = inode->i_size;
98 b->blocks = inode->i_blocks;
99 b->uid = inode->i_uid;
100 b->gid = inode->i_gid;
101 b->flags = inode->i_flags;
102 b->rdev = inode->i_rdev;
103 /* Return the correct link count for orphan inodes */
104 if (mds_inode_is_orphan(inode)) {
106 } else if (S_ISDIR(inode->i_mode)) {
109 b->nlink = inode->i_nlink;
111 b->generation = inode->i_generation;
113 b->mds = obd->u.mds.mds_num;
117 static int mds_setattr_unpack(struct ptlrpc_request *req, int offset,
118 struct mds_update_record *r)
120 struct iattr *attr = &r->ur_iattr;
121 struct mds_rec_setattr *rec;
124 rec = lustre_swab_reqbuf(req, offset, sizeof(*rec),
125 lustre_swab_mds_rec_setattr);
129 r->_ur_fsuid = rec->sa_fsuid;
130 r->_ur_fsgid = rec->sa_fsgid;
131 r->_ur_cap = rec->sa_cap;
132 r->_ur_suppgid1 = rec->sa_suppgid;
133 r->_ur_suppgid2 = -1;
134 r->ur_fid1 = &rec->sa_fid;
135 attr->ia_valid = rec->sa_valid;
136 attr->ia_mode = rec->sa_mode;
137 attr->ia_uid = rec->sa_uid;
138 attr->ia_gid = rec->sa_gid;
139 attr->ia_size = rec->sa_size;
140 LTIME_S(attr->ia_atime) = rec->sa_atime;
141 LTIME_S(attr->ia_mtime) = rec->sa_mtime;
142 LTIME_S(attr->ia_ctime) = rec->sa_ctime;
143 attr->ia_attr_flags = rec->sa_attr_flags;
145 LASSERT_REQSWAB (req, offset + 1);
146 if (req->rq_reqmsg->bufcount > offset + 1) {
147 r->ur_eadata = lustre_msg_buf (req->rq_reqmsg,
149 if (r->ur_eadata == NULL)
151 r->ur_eadatalen = req->rq_reqmsg->buflens[offset + 1];
154 if (req->rq_reqmsg->bufcount > offset + 2) {
155 r->ur_logcookies = lustre_msg_buf(req->rq_reqmsg, offset + 2,0);
156 if (r->ur_eadata == NULL)
159 r->ur_cookielen = req->rq_reqmsg->buflens[offset + 2];
165 static int mds_create_unpack(struct ptlrpc_request *req, int offset,
166 struct mds_update_record *r)
168 struct mds_rec_create *rec;
171 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
172 lustre_swab_mds_rec_create);
176 r->_ur_fsuid = rec->cr_fsuid;
177 r->_ur_fsgid = rec->cr_fsgid;
178 r->_ur_cap = rec->cr_cap;
179 r->ur_fid1 = &rec->cr_fid;
180 r->ur_fid2 = &rec->cr_replayfid;
181 r->ur_mode = rec->cr_mode;
182 r->ur_rdev = rec->cr_rdev;
183 r->ur_time = rec->cr_time;
184 r->ur_flags = rec->cr_flags;
185 r->_ur_suppgid1 = rec->cr_suppgid;
186 r->_ur_suppgid2 = -1;
188 LASSERT_REQSWAB (req, offset + 1);
189 r->ur_name = lustre_msg_string (req->rq_reqmsg, offset + 1, 0);
190 if (r->ur_name == NULL)
192 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
194 LASSERT_REQSWAB (req, offset + 2);
195 if (req->rq_reqmsg->bufcount > offset + 2) {
196 if (S_ISLNK(r->ur_mode)) {
197 r->ur_tgt = lustre_msg_string(req->rq_reqmsg,
199 if (r->ur_tgt == NULL)
201 r->ur_tgtlen = req->rq_reqmsg->buflens[offset + 2];
202 } else if (S_ISDIR(r->ur_mode)) {
203 /* Stripe info for mkdir - just a 16bit integer */
204 if (req->rq_reqmsg->buflens[offset + 2] != 2) {
205 CERROR("mkdir stripe info does not match "
206 "expected size %d vs 2\n",
207 req->rq_reqmsg->buflens[offset + 2]);
210 r->ur_eadata = lustre_swab_buf (req->rq_reqmsg,
211 offset + 2, 2, __swab16s);
212 r->ur_eadatalen = req->rq_reqmsg->buflens[offset + 2];
214 /* Hm, no other users so far? */
221 static int mds_link_unpack(struct ptlrpc_request *req, int offset,
222 struct mds_update_record *r)
224 struct mds_rec_link *rec;
227 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
228 lustre_swab_mds_rec_link);
232 r->_ur_fsuid = rec->lk_fsuid;
233 r->_ur_fsgid = rec->lk_fsgid;
234 r->_ur_cap = rec->lk_cap;
235 r->_ur_suppgid1 = rec->lk_suppgid1;
236 r->_ur_suppgid2 = rec->lk_suppgid2;
237 r->ur_fid1 = &rec->lk_fid1;
238 r->ur_fid2 = &rec->lk_fid2;
239 r->ur_time = rec->lk_time;
241 LASSERT_REQSWAB (req, offset + 1);
242 r->ur_name = lustre_msg_string (req->rq_reqmsg, offset + 1, 0);
243 if (r->ur_name == NULL)
245 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
249 static int mds_unlink_unpack(struct ptlrpc_request *req, int offset,
250 struct mds_update_record *r)
252 struct mds_rec_unlink *rec;
255 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
256 lustre_swab_mds_rec_unlink);
260 r->_ur_fsuid = rec->ul_fsuid;
261 r->_ur_fsgid = rec->ul_fsgid;
262 r->_ur_cap = rec->ul_cap;
263 r->ur_mode = rec->ul_mode;
264 r->_ur_suppgid1 = rec->ul_suppgid;
265 r->_ur_suppgid2 = -1;
266 r->ur_fid1 = &rec->ul_fid1;
267 r->ur_fid2 = &rec->ul_fid2;
268 r->ur_time = rec->ul_time;
270 LASSERT_REQSWAB (req, offset + 1);
271 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
272 if (r->ur_name == NULL)
274 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
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_unlink);
289 r->_ur_fsuid = rec->rn_fsuid;
290 r->_ur_fsgid = rec->rn_fsgid;
291 r->_ur_cap = rec->rn_cap;
292 r->_ur_suppgid1 = rec->rn_suppgid1;
293 r->_ur_suppgid2 = rec->rn_suppgid2;
294 r->ur_fid1 = &rec->rn_fid1;
295 r->ur_fid2 = &rec->rn_fid2;
296 r->ur_time = rec->rn_time;
298 LASSERT_REQSWAB (req, offset + 1);
299 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
300 if (r->ur_name == NULL)
302 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
304 LASSERT_REQSWAB (req, offset + 2);
305 r->ur_tgt = lustre_msg_string(req->rq_reqmsg, offset + 2, 0);
306 if (r->ur_tgt == NULL)
308 r->ur_tgtlen = req->rq_reqmsg->buflens[offset + 2];
312 static int mds_open_unpack(struct ptlrpc_request *req, int offset,
313 struct mds_update_record *r)
315 struct mds_rec_create *rec;
318 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
319 lustre_swab_mds_rec_create);
323 r->_ur_fsuid = rec->cr_fsuid;
324 r->_ur_fsgid = rec->cr_fsgid;
325 r->_ur_cap = rec->cr_cap;
326 r->ur_fid1 = &rec->cr_fid;
327 r->ur_fid2 = &rec->cr_replayfid;
328 r->ur_mode = rec->cr_mode;
329 r->ur_rdev = rec->cr_rdev;
330 r->ur_time = rec->cr_time;
331 r->ur_flags = rec->cr_flags;
332 r->_ur_suppgid1 = rec->cr_suppgid;
333 r->_ur_suppgid2 = -1;
335 LASSERT_REQSWAB (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 = req->rq_reqmsg->buflens[offset + 1];
341 LASSERT_REQSWAB (req, offset + 2);
342 if (req->rq_reqmsg->bufcount > offset + 2) {
343 r->ur_eadata = lustre_msg_buf(req->rq_reqmsg, offset + 2, 0);
344 if (r->ur_eadata == NULL)
346 r->ur_eadatalen = req->rq_reqmsg->buflens[offset + 2];
351 typedef int (*update_unpacker)(struct ptlrpc_request *req, int offset,
352 struct mds_update_record *r);
354 static update_unpacker mds_unpackers[REINT_MAX + 1] = {
355 [REINT_SETATTR] mds_setattr_unpack,
356 [REINT_CREATE] mds_create_unpack,
357 [REINT_LINK] mds_link_unpack,
358 [REINT_UNLINK] mds_unlink_unpack,
359 [REINT_RENAME] mds_rename_unpack,
360 [REINT_OPEN] mds_open_unpack,
363 int mds_update_unpack(struct ptlrpc_request *req, int offset,
364 struct mds_update_record *rec)
371 /* NB don't lustre_swab_reqbuf() here. We're just taking a peek
372 * and we want to leave it to the specific unpacker once we've
373 * identified the message type */
374 opcodep = lustre_msg_buf (req->rq_reqmsg, offset, sizeof (*opcodep));
379 if (lustre_msg_swabbed (req->rq_reqmsg))
382 if (opcode > REINT_MAX ||
383 mds_unpackers[opcode] == NULL) {
384 CERROR ("Unexpected opcode %d\n", opcode);
388 rec->ur_opcode = opcode;
389 rc = mds_unpackers[opcode](req, offset, rec);