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>
51 #include <linux/lustre_lite.h>
53 void mds_pack_inode2fid(struct ll_fid *fid, struct inode *inode)
55 fid->id = inode->i_ino;
56 fid->generation = inode->i_generation;
57 fid->f_type = (S_IFMT & inode->i_mode);
60 void mds_pack_inode2body(struct mds_body *b, struct inode *inode)
62 b->valid = OBD_MD_FLID | OBD_MD_FLATIME | OBD_MD_FLMTIME |
63 OBD_MD_FLCTIME | OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
64 OBD_MD_FLUID | OBD_MD_FLGID | OBD_MD_FLTYPE | OBD_MD_FLMODE |
65 OBD_MD_FLNLINK | OBD_MD_FLGENER;
67 /* The MDS file size isn't authoritative for regular files, so don't
69 if (S_ISREG(inode->i_mode))
70 b->valid &= ~(OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
72 b->ino = inode->i_ino;
73 b->atime = LTIME_S(inode->i_atime);
74 b->mtime = LTIME_S(inode->i_mtime);
75 b->ctime = LTIME_S(inode->i_ctime);
76 b->mode = inode->i_mode;
77 b->size = inode->i_size;
78 b->blocks = inode->i_blocks;
79 b->uid = inode->i_uid;
80 b->gid = inode->i_gid;
81 b->flags = inode->i_flags;
83 b->nlink = inode->i_nlink;
84 b->generation = inode->i_generation;
88 static int mds_setattr_unpack(struct ptlrpc_request *req, int offset,
89 struct mds_update_record *r)
91 struct iattr *attr = &r->ur_iattr;
92 struct mds_rec_setattr *rec;
95 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
96 lustre_swab_mds_rec_setattr);
100 r->ur_fsuid = rec->sa_fsuid;
101 r->ur_fsgid = rec->sa_fsgid;
102 r->ur_cap = rec->sa_cap;
103 r->ur_suppgid1 = rec->sa_suppgid;
105 r->ur_fid1 = &rec->sa_fid;
106 attr->ia_valid = rec->sa_valid;
107 attr->ia_mode = rec->sa_mode;
108 attr->ia_uid = rec->sa_uid;
109 attr->ia_gid = rec->sa_gid;
110 attr->ia_size = rec->sa_size;
111 LTIME_S(attr->ia_atime) = rec->sa_atime;
112 LTIME_S(attr->ia_mtime) = rec->sa_mtime;
113 LTIME_S(attr->ia_ctime) = rec->sa_ctime;
114 attr->ia_attr_flags = rec->sa_attr_flags;
116 LASSERT_REQSWAB (req, offset + 1);
117 if (req->rq_reqmsg->bufcount > offset + 1) {
118 r->ur_eadata = lustre_msg_buf (req->rq_reqmsg,
120 if (r->ur_eadata == NULL)
122 r->ur_eadatalen = req->rq_reqmsg->buflens[offset + 1];
131 static int mds_create_unpack(struct ptlrpc_request *req, int offset,
132 struct mds_update_record *r)
134 struct mds_rec_create *rec;
137 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
138 lustre_swab_mds_rec_create);
142 r->ur_fsuid = rec->cr_fsuid;
143 r->ur_fsgid = rec->cr_fsgid;
144 r->ur_cap = rec->cr_cap;
145 r->ur_fid1 = &rec->cr_fid;
146 r->ur_fid2 = &rec->cr_replayfid;
147 r->ur_mode = rec->cr_mode;
148 r->ur_rdev = rec->cr_rdev;
149 r->ur_uid = rec->cr_uid;
150 r->ur_gid = rec->cr_gid;
151 r->ur_time = rec->cr_time;
152 r->ur_flags = rec->cr_flags;
153 r->ur_suppgid1 = rec->cr_suppgid;
156 LASSERT_REQSWAB (req, offset + 1);
157 r->ur_name = lustre_msg_string (req->rq_reqmsg, offset + 1, 0);
158 if (r->ur_name == NULL)
160 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
162 LASSERT_REQSWAB (req, offset + 2);
163 if (req->rq_reqmsg->bufcount > offset + 2) {
164 /* NB for now, we only seem to pass NULL terminated symlink
165 * target strings here. If this ever changes, we'll have
166 * to stop checking for a buffer filled completely with a
167 * NULL terminated string here, and make the callers check
168 * depending on what they expect. We should probably stash
169 * it in r->ur_eadata in that case, so it's obvious... -eeb
171 r->ur_tgt = lustre_msg_string(req->rq_reqmsg, offset + 2, 0);
172 if (r->ur_tgt == NULL)
174 r->ur_tgtlen = req->rq_reqmsg->buflens[offset + 2];
182 static int mds_link_unpack(struct ptlrpc_request *req, int offset,
183 struct mds_update_record *r)
185 struct mds_rec_link *rec;
188 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
189 lustre_swab_mds_rec_link);
193 r->ur_fsuid = rec->lk_fsuid;
194 r->ur_fsgid = rec->lk_fsgid;
195 r->ur_cap = rec->lk_cap;
196 r->ur_suppgid1 = rec->lk_suppgid1;
197 r->ur_suppgid2 = rec->lk_suppgid2;
198 r->ur_fid1 = &rec->lk_fid1;
199 r->ur_fid2 = &rec->lk_fid2;
201 LASSERT_REQSWAB (req, offset + 1);
202 r->ur_name = lustre_msg_string (req->rq_reqmsg, offset + 1, 0);
203 if (r->ur_name == NULL)
205 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
209 static int mds_unlink_unpack(struct ptlrpc_request *req, int offset,
210 struct mds_update_record *r)
212 struct mds_rec_unlink *rec;
215 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
216 lustre_swab_mds_rec_unlink);
220 r->ur_fsuid = rec->ul_fsuid;
221 r->ur_fsgid = rec->ul_fsgid;
222 r->ur_cap = rec->ul_cap;
223 r->ur_mode = rec->ul_mode;
224 r->ur_suppgid1 = rec->ul_suppgid;
226 r->ur_fid1 = &rec->ul_fid1;
227 r->ur_fid2 = &rec->ul_fid2;
229 LASSERT_REQSWAB (req, offset + 1);
230 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
231 if (r->ur_name == NULL)
233 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
237 static int mds_rename_unpack(struct ptlrpc_request *req, int offset,
238 struct mds_update_record *r)
240 struct mds_rec_rename *rec;
243 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
244 lustre_swab_mds_rec_unlink);
248 r->ur_fsuid = rec->rn_fsuid;
249 r->ur_fsgid = rec->rn_fsgid;
250 r->ur_cap = rec->rn_cap;
251 r->ur_suppgid1 = rec->rn_suppgid1;
252 r->ur_suppgid2 = rec->rn_suppgid2;
253 r->ur_fid1 = &rec->rn_fid1;
254 r->ur_fid2 = &rec->rn_fid2;
256 LASSERT_REQSWAB (req, offset + 1);
257 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
258 if (r->ur_name == NULL)
260 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
262 LASSERT_REQSWAB (req, offset + 2);
263 r->ur_tgt = lustre_msg_string(req->rq_reqmsg, offset + 2, 0);
264 if (r->ur_tgt == NULL)
266 r->ur_tgtlen = req->rq_reqmsg->buflens[offset + 2];
270 typedef int (*update_unpacker)(struct ptlrpc_request *req, int offset,
271 struct mds_update_record *r);
273 static update_unpacker mds_unpackers[REINT_MAX + 1] = {
274 [REINT_SETATTR] mds_setattr_unpack,
275 [REINT_CREATE] mds_create_unpack,
276 [REINT_LINK] mds_link_unpack,
277 [REINT_UNLINK] mds_unlink_unpack,
278 [REINT_RENAME] mds_rename_unpack,
279 [REINT_OPEN] mds_create_unpack,
282 int mds_update_unpack(struct ptlrpc_request *req, int offset,
283 struct mds_update_record *rec)
290 /* NB don't lustre_swab_reqbuf() here. We're just taking a peek
291 * and we want to leave it to the specific unpacker once we've
292 * identified the message type */
293 opcodep = lustre_msg_buf (req->rq_reqmsg, offset, sizeof (*opcodep));
298 if (lustre_msg_swabbed (req->rq_reqmsg))
301 if (opcode > REINT_MAX ||
302 mds_unpackers[opcode] == NULL) {
303 CERROR ("Unexpected opcode %d\n", opcode);
307 rec->ur_opcode = opcode;
308 rc = mds_unpackers[opcode](req, offset, rec);