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_dentry2fid(struct ll_fid *fid, struct dentry *dentry)
54 fid->id = dentry->d_inum;
55 fid->generation = dentry->d_generation;
56 fid->mds = dentry->d_mdsnum;
59 void mds_pack_dentry2body(struct mds_body *b, struct dentry *dentry)
61 b->valid |= OBD_MD_FLID | OBD_MD_FLGENER;
62 b->ino = dentry->d_inum;
63 b->generation = dentry->d_generation;
64 b->mds = dentry->d_mdsnum;
67 void mds_pack_inode2fid(struct obd_device *obd, struct ll_fid *fid,
70 fid->id = inode->i_ino;
71 fid->generation = inode->i_generation;
72 fid->f_type = (S_IFMT & inode->i_mode);
73 fid->mds = obd->u.mds.mds_num;
76 /* Note that we can copy all of the fields, just some will not be "valid" */
77 void mds_pack_inode2body(struct obd_device *obd, struct mds_body *b,
80 b->valid |= OBD_MD_FLID | OBD_MD_FLCTIME | OBD_MD_FLUID |
81 OBD_MD_FLGID | OBD_MD_FLFLAGS | OBD_MD_FLTYPE |
82 OBD_MD_FLMODE | OBD_MD_FLNLINK | OBD_MD_FLGENER |
83 OBD_MD_FLATIME | OBD_MD_FLMTIME; /* bug 2020 */
85 if (!S_ISREG(inode->i_mode))
86 b->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS | OBD_MD_FLATIME |
87 OBD_MD_FLMTIME | OBD_MD_FLRDEV;
89 b->ino = inode->i_ino;
90 b->atime = LTIME_S(inode->i_atime);
91 b->mtime = LTIME_S(inode->i_mtime);
92 b->ctime = LTIME_S(inode->i_ctime);
93 b->mode = inode->i_mode;
94 b->size = inode->i_size;
95 b->blocks = inode->i_blocks;
96 b->uid = inode->i_uid;
97 b->gid = inode->i_gid;
98 b->flags = inode->i_flags;
99 b->rdev = inode->i_rdev;
100 /* Return the correct link count for orphan inodes */
101 if (mds_inode_is_orphan(inode)) {
103 } else if (S_ISDIR(inode->i_mode)) {
106 b->nlink = inode->i_nlink;
108 b->generation = inode->i_generation;
110 b->mds = obd->u.mds.mds_num;
114 static int mds_setattr_unpack(struct ptlrpc_request *req, int offset,
115 struct mds_update_record *r)
117 struct iattr *attr = &r->ur_iattr;
118 struct mds_rec_setattr *rec;
121 rec = lustre_swab_reqbuf(req, offset, sizeof(*rec),
122 lustre_swab_mds_rec_setattr);
126 r->_ur_fsuid = rec->sa_fsuid;
127 r->_ur_fsgid = rec->sa_fsgid;
128 r->_ur_cap = rec->sa_cap;
129 r->_ur_suppgid1 = rec->sa_suppgid;
130 r->_ur_suppgid2 = -1;
131 r->ur_fid1 = &rec->sa_fid;
132 attr->ia_valid = rec->sa_valid;
133 attr->ia_mode = rec->sa_mode;
134 attr->ia_uid = rec->sa_uid;
135 attr->ia_gid = rec->sa_gid;
136 attr->ia_size = rec->sa_size;
137 LTIME_S(attr->ia_atime) = rec->sa_atime;
138 LTIME_S(attr->ia_mtime) = rec->sa_mtime;
139 LTIME_S(attr->ia_ctime) = rec->sa_ctime;
140 attr->ia_attr_flags = rec->sa_attr_flags;
142 LASSERT_REQSWAB (req, offset + 1);
143 if (req->rq_reqmsg->bufcount > offset + 1) {
144 r->ur_eadata = lustre_msg_buf (req->rq_reqmsg,
146 if (r->ur_eadata == NULL)
148 r->ur_eadatalen = req->rq_reqmsg->buflens[offset + 1];
151 if (req->rq_reqmsg->bufcount > offset + 2) {
152 r->ur_logcookies = lustre_msg_buf(req->rq_reqmsg, offset + 2,0);
153 if (r->ur_eadata == NULL)
156 r->ur_cookielen = req->rq_reqmsg->buflens[offset + 2];
162 static int mds_create_unpack(struct ptlrpc_request *req, int offset,
163 struct mds_update_record *r)
165 struct mds_rec_create *rec;
168 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
169 lustre_swab_mds_rec_create);
173 r->_ur_fsuid = rec->cr_fsuid;
174 r->_ur_fsgid = rec->cr_fsgid;
175 r->_ur_cap = rec->cr_cap;
176 r->ur_fid1 = &rec->cr_fid;
177 r->ur_fid2 = &rec->cr_replayfid;
178 r->ur_mode = rec->cr_mode;
179 r->ur_rdev = rec->cr_rdev;
180 r->ur_time = rec->cr_time;
181 r->ur_flags = rec->cr_flags;
182 r->_ur_suppgid1 = rec->cr_suppgid;
183 r->_ur_suppgid2 = -1;
185 LASSERT_REQSWAB (req, offset + 1);
186 r->ur_name = lustre_msg_string (req->rq_reqmsg, offset + 1, 0);
187 if (r->ur_name == NULL)
189 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
191 LASSERT_REQSWAB (req, offset + 2);
192 if (req->rq_reqmsg->bufcount > offset + 2) {
193 if (S_ISLNK(r->ur_mode)) {
194 r->ur_tgt = lustre_msg_string(req->rq_reqmsg,
196 if (r->ur_tgt == NULL)
198 r->ur_tgtlen = req->rq_reqmsg->buflens[offset + 2];
199 } else if (S_ISDIR(r->ur_mode)) {
200 /* Stripe info for mkdir - just a 16bit integer */
201 if (req->rq_reqmsg->buflens[offset + 2] != 2) {
202 CERROR("mkdir stripe info does not match "
203 "expected size %d vs 2\n",
204 req->rq_reqmsg->buflens[offset + 2]);
207 r->ur_eadata = lustre_swab_buf (req->rq_reqmsg,
208 offset + 2, 2, __swab16s);
209 r->ur_eadatalen = req->rq_reqmsg->buflens[offset + 2];
211 /* Hm, no other users so far? */
218 static int mds_link_unpack(struct ptlrpc_request *req, int offset,
219 struct mds_update_record *r)
221 struct mds_rec_link *rec;
224 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
225 lustre_swab_mds_rec_link);
229 r->_ur_fsuid = rec->lk_fsuid;
230 r->_ur_fsgid = rec->lk_fsgid;
231 r->_ur_cap = rec->lk_cap;
232 r->_ur_suppgid1 = rec->lk_suppgid1;
233 r->_ur_suppgid2 = rec->lk_suppgid2;
234 r->ur_fid1 = &rec->lk_fid1;
235 r->ur_fid2 = &rec->lk_fid2;
236 r->ur_time = rec->lk_time;
238 LASSERT_REQSWAB (req, offset + 1);
239 r->ur_name = lustre_msg_string (req->rq_reqmsg, offset + 1, 0);
240 if (r->ur_name == NULL)
242 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
246 static int mds_unlink_unpack(struct ptlrpc_request *req, int offset,
247 struct mds_update_record *r)
249 struct mds_rec_unlink *rec;
252 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
253 lustre_swab_mds_rec_unlink);
257 r->_ur_fsuid = rec->ul_fsuid;
258 r->_ur_fsgid = rec->ul_fsgid;
259 r->_ur_cap = rec->ul_cap;
260 r->ur_mode = rec->ul_mode;
261 r->_ur_suppgid1 = rec->ul_suppgid;
262 r->_ur_suppgid2 = -1;
263 r->ur_fid1 = &rec->ul_fid1;
264 r->ur_fid2 = &rec->ul_fid2;
265 r->ur_time = rec->ul_time;
267 LASSERT_REQSWAB (req, offset + 1);
268 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
269 if (r->ur_name == NULL)
271 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
275 static int mds_rename_unpack(struct ptlrpc_request *req, int offset,
276 struct mds_update_record *r)
278 struct mds_rec_rename *rec;
281 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
282 lustre_swab_mds_rec_unlink);
286 r->_ur_fsuid = rec->rn_fsuid;
287 r->_ur_fsgid = rec->rn_fsgid;
288 r->_ur_cap = rec->rn_cap;
289 r->_ur_suppgid1 = rec->rn_suppgid1;
290 r->_ur_suppgid2 = rec->rn_suppgid2;
291 r->ur_fid1 = &rec->rn_fid1;
292 r->ur_fid2 = &rec->rn_fid2;
293 r->ur_time = rec->rn_time;
295 LASSERT_REQSWAB (req, offset + 1);
296 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
297 if (r->ur_name == NULL)
299 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
301 LASSERT_REQSWAB (req, offset + 2);
302 r->ur_tgt = lustre_msg_string(req->rq_reqmsg, offset + 2, 0);
303 if (r->ur_tgt == NULL)
305 r->ur_tgtlen = req->rq_reqmsg->buflens[offset + 2];
309 static int mds_open_unpack(struct ptlrpc_request *req, int offset,
310 struct mds_update_record *r)
312 struct mds_rec_create *rec;
315 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
316 lustre_swab_mds_rec_create);
320 r->_ur_fsuid = rec->cr_fsuid;
321 r->_ur_fsgid = rec->cr_fsgid;
322 r->_ur_cap = rec->cr_cap;
323 r->ur_fid1 = &rec->cr_fid;
324 r->ur_fid2 = &rec->cr_replayfid;
325 r->ur_mode = rec->cr_mode;
326 r->ur_rdev = rec->cr_rdev;
327 r->ur_time = rec->cr_time;
328 r->ur_flags = rec->cr_flags;
329 r->_ur_suppgid1 = rec->cr_suppgid;
330 r->_ur_suppgid2 = -1;
332 LASSERT_REQSWAB (req, offset + 1);
333 r->ur_name = lustre_msg_string (req->rq_reqmsg, offset + 1, 0);
334 if (r->ur_name == NULL)
336 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
338 LASSERT_REQSWAB (req, offset + 2);
339 if (req->rq_reqmsg->bufcount > offset + 2) {
340 r->ur_eadata = lustre_msg_buf(req->rq_reqmsg, offset + 2, 0);
341 if (r->ur_eadata == NULL)
343 r->ur_eadatalen = req->rq_reqmsg->buflens[offset + 2];
348 typedef int (*update_unpacker)(struct ptlrpc_request *req, int offset,
349 struct mds_update_record *r);
351 static update_unpacker mds_unpackers[REINT_MAX + 1] = {
352 [REINT_SETATTR] mds_setattr_unpack,
353 [REINT_CREATE] mds_create_unpack,
354 [REINT_LINK] mds_link_unpack,
355 [REINT_UNLINK] mds_unlink_unpack,
356 [REINT_RENAME] mds_rename_unpack,
357 [REINT_OPEN] mds_open_unpack,
360 int mds_update_unpack(struct ptlrpc_request *req, int offset,
361 struct mds_update_record *rec)
368 /* NB don't lustre_swab_reqbuf() here. We're just taking a peek
369 * and we want to leave it to the specific unpacker once we've
370 * identified the message type */
371 opcodep = lustre_msg_buf (req->rq_reqmsg, offset, sizeof (*opcodep));
376 if (lustre_msg_swabbed (req->rq_reqmsg))
379 if (opcode > REINT_MAX ||
380 mds_unpackers[opcode] == NULL) {
381 CERROR ("Unexpected opcode %d\n", opcode);
385 rec->ur_opcode = opcode;
386 rc = mds_unpackers[opcode](req, offset, rec);