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,
53 struct dentry *dentry)
55 fid->id = dentry->d_inum;
56 fid->generation = dentry->d_generation;
57 fid->mds = dentry->d_mdsnum;
60 void mds_pack_inode2fid(struct obd_device *obd, struct ll_fid *fid,
63 fid->id = inode->i_ino;
64 fid->generation = inode->i_generation;
65 fid->f_type = (S_IFMT & inode->i_mode);
66 fid->mds = obd->u.mds.mds_num;
69 /* Note that we can copy all of the fields, just some will not be "valid" */
70 void mds_pack_inode2body(struct obd_device *obd, struct mds_body *b,
73 b->valid |= OBD_MD_FLID | OBD_MD_FLCTIME | OBD_MD_FLUID |
74 OBD_MD_FLGID | OBD_MD_FLFLAGS | OBD_MD_FLTYPE |
75 OBD_MD_FLMODE | OBD_MD_FLNLINK | OBD_MD_FLGENER |
76 OBD_MD_FLATIME | OBD_MD_FLMTIME; /* bug 2020 */
78 if (!S_ISREG(inode->i_mode))
79 b->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS | OBD_MD_FLATIME |
80 OBD_MD_FLMTIME | OBD_MD_FLRDEV;
82 b->ino = inode->i_ino;
83 b->atime = LTIME_S(inode->i_atime);
84 b->mtime = LTIME_S(inode->i_mtime);
85 b->ctime = LTIME_S(inode->i_ctime);
86 b->mode = inode->i_mode;
87 b->size = inode->i_size;
88 b->blocks = inode->i_blocks;
89 b->uid = inode->i_uid;
90 b->gid = inode->i_gid;
91 b->flags = inode->i_flags;
92 b->rdev = inode->i_rdev;
93 /* Return the correct link count for orphan inodes */
94 if (mds_inode_is_orphan(inode)) {
96 } else if (S_ISDIR(inode->i_mode)) {
99 b->nlink = inode->i_nlink;
101 b->generation = inode->i_generation;
103 b->mds = obd->u.mds.mds_num;
107 static int mds_setattr_unpack(struct ptlrpc_request *req, int offset,
108 struct mds_update_record *r)
110 struct iattr *attr = &r->ur_iattr;
111 struct mds_rec_setattr *rec;
114 rec = lustre_swab_reqbuf(req, offset, sizeof(*rec),
115 lustre_swab_mds_rec_setattr);
119 r->_ur_fsuid = rec->sa_fsuid;
120 r->_ur_fsgid = rec->sa_fsgid;
121 r->_ur_cap = rec->sa_cap;
122 r->_ur_suppgid1 = rec->sa_suppgid;
123 r->_ur_suppgid2 = -1;
124 r->ur_fid1 = &rec->sa_fid;
125 attr->ia_valid = rec->sa_valid;
126 attr->ia_mode = rec->sa_mode;
127 attr->ia_uid = rec->sa_uid;
128 attr->ia_gid = rec->sa_gid;
129 attr->ia_size = rec->sa_size;
130 LTIME_S(attr->ia_atime) = rec->sa_atime;
131 LTIME_S(attr->ia_mtime) = rec->sa_mtime;
132 LTIME_S(attr->ia_ctime) = rec->sa_ctime;
133 attr->ia_attr_flags = rec->sa_attr_flags;
135 LASSERT_REQSWAB (req, offset + 1);
136 if (req->rq_reqmsg->bufcount > offset + 1) {
137 r->ur_eadata = lustre_msg_buf (req->rq_reqmsg,
139 if (r->ur_eadata == NULL)
141 r->ur_eadatalen = req->rq_reqmsg->buflens[offset + 1];
144 if (req->rq_reqmsg->bufcount > offset + 2) {
145 r->ur_logcookies = lustre_msg_buf(req->rq_reqmsg, offset + 2,0);
146 if (r->ur_eadata == NULL)
149 r->ur_cookielen = req->rq_reqmsg->buflens[offset + 2];
155 static int mds_create_unpack(struct ptlrpc_request *req, int offset,
156 struct mds_update_record *r)
158 struct mds_rec_create *rec;
161 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
162 lustre_swab_mds_rec_create);
166 r->_ur_fsuid = rec->cr_fsuid;
167 r->_ur_fsgid = rec->cr_fsgid;
168 r->_ur_cap = rec->cr_cap;
169 r->ur_fid1 = &rec->cr_fid;
170 r->ur_fid2 = &rec->cr_replayfid;
171 r->ur_mode = rec->cr_mode;
172 r->ur_rdev = rec->cr_rdev;
173 r->ur_time = rec->cr_time;
174 r->ur_flags = rec->cr_flags;
175 r->_ur_suppgid1 = rec->cr_suppgid;
176 r->_ur_suppgid2 = -1;
178 LASSERT_REQSWAB (req, offset + 1);
179 r->ur_name = lustre_msg_string (req->rq_reqmsg, offset + 1, 0);
180 if (r->ur_name == NULL)
182 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
184 LASSERT_REQSWAB (req, offset + 2);
185 if (req->rq_reqmsg->bufcount > offset + 2) {
186 if (S_ISLNK(r->ur_mode)) {
187 r->ur_tgt = lustre_msg_string(req->rq_reqmsg,
189 if (r->ur_tgt == NULL)
191 r->ur_tgtlen = req->rq_reqmsg->buflens[offset + 2];
192 } else if (S_ISDIR(r->ur_mode)) {
193 /* Stripe info for mkdir - just a 16bit integer */
194 if (req->rq_reqmsg->buflens[offset + 2] != 2) {
195 CERROR("mkdir stripe info does not match "
196 "expected size %d vs 2\n",
197 req->rq_reqmsg->buflens[offset + 2]);
200 r->ur_eadata = lustre_swab_buf (req->rq_reqmsg,
201 offset + 2, 2, __swab16s);
202 r->ur_eadatalen = req->rq_reqmsg->buflens[offset + 2];
204 /* Hm, no other users so far? */
211 static int mds_link_unpack(struct ptlrpc_request *req, int offset,
212 struct mds_update_record *r)
214 struct mds_rec_link *rec;
217 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
218 lustre_swab_mds_rec_link);
222 r->_ur_fsuid = rec->lk_fsuid;
223 r->_ur_fsgid = rec->lk_fsgid;
224 r->_ur_cap = rec->lk_cap;
225 r->_ur_suppgid1 = rec->lk_suppgid1;
226 r->_ur_suppgid2 = rec->lk_suppgid2;
227 r->ur_fid1 = &rec->lk_fid1;
228 r->ur_fid2 = &rec->lk_fid2;
229 r->ur_time = rec->lk_time;
231 LASSERT_REQSWAB (req, offset + 1);
232 r->ur_name = lustre_msg_string (req->rq_reqmsg, offset + 1, 0);
233 if (r->ur_name == NULL)
235 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
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_fsuid = rec->ul_fsuid;
251 r->_ur_fsgid = rec->ul_fsgid;
252 r->_ur_cap = rec->ul_cap;
253 r->ur_mode = rec->ul_mode;
254 r->_ur_suppgid1 = rec->ul_suppgid;
255 r->_ur_suppgid2 = -1;
256 r->ur_fid1 = &rec->ul_fid1;
257 r->ur_fid2 = &rec->ul_fid2;
258 r->ur_time = rec->ul_time;
260 LASSERT_REQSWAB (req, offset + 1);
261 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
262 if (r->ur_name == NULL)
264 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
268 static int mds_rename_unpack(struct ptlrpc_request *req, int offset,
269 struct mds_update_record *r)
271 struct mds_rec_rename *rec;
274 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
275 lustre_swab_mds_rec_unlink);
279 r->_ur_fsuid = rec->rn_fsuid;
280 r->_ur_fsgid = rec->rn_fsgid;
281 r->_ur_cap = rec->rn_cap;
282 r->_ur_suppgid1 = rec->rn_suppgid1;
283 r->_ur_suppgid2 = rec->rn_suppgid2;
284 r->ur_fid1 = &rec->rn_fid1;
285 r->ur_fid2 = &rec->rn_fid2;
286 r->ur_time = rec->rn_time;
288 LASSERT_REQSWAB (req, offset + 1);
289 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
290 if (r->ur_name == NULL)
292 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
294 LASSERT_REQSWAB (req, offset + 2);
295 r->ur_tgt = lustre_msg_string(req->rq_reqmsg, offset + 2, 0);
296 if (r->ur_tgt == NULL)
298 r->ur_tgtlen = req->rq_reqmsg->buflens[offset + 2];
302 static int mds_open_unpack(struct ptlrpc_request *req, int offset,
303 struct mds_update_record *r)
305 struct mds_rec_create *rec;
308 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
309 lustre_swab_mds_rec_create);
313 r->_ur_fsuid = rec->cr_fsuid;
314 r->_ur_fsgid = rec->cr_fsgid;
315 r->_ur_cap = rec->cr_cap;
316 r->ur_fid1 = &rec->cr_fid;
317 r->ur_fid2 = &rec->cr_replayfid;
318 r->ur_mode = rec->cr_mode;
319 r->ur_rdev = rec->cr_rdev;
320 r->ur_time = rec->cr_time;
321 r->ur_flags = rec->cr_flags;
322 r->_ur_suppgid1 = rec->cr_suppgid;
323 r->_ur_suppgid2 = -1;
325 LASSERT_REQSWAB (req, offset + 1);
326 r->ur_name = lustre_msg_string (req->rq_reqmsg, offset + 1, 0);
327 if (r->ur_name == NULL)
329 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
331 LASSERT_REQSWAB (req, offset + 2);
332 if (req->rq_reqmsg->bufcount > offset + 2) {
333 r->ur_eadata = lustre_msg_buf(req->rq_reqmsg, offset + 2, 0);
334 if (r->ur_eadata == NULL)
336 r->ur_eadatalen = req->rq_reqmsg->buflens[offset + 2];
341 typedef int (*update_unpacker)(struct ptlrpc_request *req, int offset,
342 struct mds_update_record *r);
344 static update_unpacker mds_unpackers[REINT_MAX + 1] = {
345 [REINT_SETATTR] mds_setattr_unpack,
346 [REINT_CREATE] mds_create_unpack,
347 [REINT_LINK] mds_link_unpack,
348 [REINT_UNLINK] mds_unlink_unpack,
349 [REINT_RENAME] mds_rename_unpack,
350 [REINT_OPEN] mds_open_unpack,
353 int mds_update_unpack(struct ptlrpc_request *req, int offset,
354 struct mds_update_record *rec)
361 /* NB don't lustre_swab_reqbuf() here. We're just taking a peek
362 * and we want to leave it to the specific unpacker once we've
363 * identified the message type */
364 opcodep = lustre_msg_buf (req->rq_reqmsg, offset, sizeof (*opcodep));
369 if (lustre_msg_swabbed (req->rq_reqmsg))
372 if (opcode > REINT_MAX ||
373 mds_unpackers[opcode] == NULL) {
374 CERROR ("Unexpected opcode %d\n", opcode);
378 rec->ur_opcode = opcode;
379 rc = mds_unpackers[opcode](req, offset, rec);