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 b->nlink = mds_inode_is_orphan(inode) ? 0 : inode->i_nlink;
87 b->generation = inode->i_generation;
89 b->mds = obd->u.mds.mds_num;
93 static int mds_setattr_unpack(struct ptlrpc_request *req, int offset,
94 struct mds_update_record *r)
96 struct iattr *attr = &r->ur_iattr;
97 struct mds_rec_setattr *rec;
100 rec = lustre_swab_reqbuf(req, offset, sizeof(*rec),
101 lustre_swab_mds_rec_setattr);
105 r->ur_fsuid = rec->sa_fsuid;
106 r->ur_fsgid = rec->sa_fsgid;
107 r->ur_cap = rec->sa_cap;
108 r->ur_suppgid1 = rec->sa_suppgid;
110 r->ur_fid1 = &rec->sa_fid;
111 attr->ia_valid = rec->sa_valid;
112 attr->ia_mode = rec->sa_mode;
113 attr->ia_uid = rec->sa_uid;
114 attr->ia_gid = rec->sa_gid;
115 attr->ia_size = rec->sa_size;
116 LTIME_S(attr->ia_atime) = rec->sa_atime;
117 LTIME_S(attr->ia_mtime) = rec->sa_mtime;
118 LTIME_S(attr->ia_ctime) = rec->sa_ctime;
119 attr->ia_attr_flags = rec->sa_attr_flags;
121 LASSERT_REQSWAB (req, offset + 1);
122 if (req->rq_reqmsg->bufcount > offset + 1) {
123 r->ur_eadata = lustre_msg_buf (req->rq_reqmsg,
125 if (r->ur_eadata == NULL)
127 r->ur_eadatalen = req->rq_reqmsg->buflens[offset + 1];
130 if (req->rq_reqmsg->bufcount > offset + 2) {
131 r->ur_logcookies = lustre_msg_buf(req->rq_reqmsg, offset + 2,0);
132 if (r->ur_eadata == NULL)
135 r->ur_cookielen = req->rq_reqmsg->buflens[offset + 2];
141 static int mds_create_unpack(struct ptlrpc_request *req, int offset,
142 struct mds_update_record *r)
144 struct mds_rec_create *rec;
147 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
148 lustre_swab_mds_rec_create);
152 r->ur_fsuid = rec->cr_fsuid;
153 r->ur_fsgid = rec->cr_fsgid;
154 r->ur_cap = rec->cr_cap;
155 r->ur_fid1 = &rec->cr_fid;
156 r->ur_fid2 = &rec->cr_replayfid;
157 r->ur_mode = rec->cr_mode;
158 r->ur_rdev = rec->cr_rdev;
159 r->ur_time = rec->cr_time;
160 r->ur_flags = rec->cr_flags;
161 r->ur_suppgid1 = rec->cr_suppgid;
164 LASSERT_REQSWAB (req, offset + 1);
165 r->ur_name = lustre_msg_string (req->rq_reqmsg, offset + 1, 0);
166 if (r->ur_name == NULL)
168 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
170 LASSERT_REQSWAB (req, offset + 2);
171 if (req->rq_reqmsg->bufcount > offset + 2) {
172 if (S_ISLNK(r->ur_mode)) {
173 r->ur_tgt = lustre_msg_string(req->rq_reqmsg,
175 if (r->ur_tgt == NULL)
177 r->ur_tgtlen = req->rq_reqmsg->buflens[offset + 2];
178 } else if (S_ISDIR(r->ur_mode)) {
179 /* Stripe info for mkdir - just a 16bit integer */
180 if (req->rq_reqmsg->buflens[offset + 2] != 2) {
181 CERROR("mkdir stripe info does not match "
182 "expected size %d vs 2\n",
183 req->rq_reqmsg->buflens[offset + 2]);
186 r->ur_eadata = lustre_swab_buf (req->rq_reqmsg,
187 offset + 2, 2, __swab16s);
188 r->ur_eadatalen = req->rq_reqmsg->buflens[offset + 2];
190 /* Hm, no other users so far? */
197 static int mds_link_unpack(struct ptlrpc_request *req, int offset,
198 struct mds_update_record *r)
200 struct mds_rec_link *rec;
203 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
204 lustre_swab_mds_rec_link);
208 r->ur_fsuid = rec->lk_fsuid;
209 r->ur_fsgid = rec->lk_fsgid;
210 r->ur_cap = rec->lk_cap;
211 r->ur_suppgid1 = rec->lk_suppgid1;
212 r->ur_suppgid2 = rec->lk_suppgid2;
213 r->ur_fid1 = &rec->lk_fid1;
214 r->ur_fid2 = &rec->lk_fid2;
215 r->ur_time = rec->lk_time;
217 LASSERT_REQSWAB (req, offset + 1);
218 r->ur_name = lustre_msg_string (req->rq_reqmsg, offset + 1, 0);
219 if (r->ur_name == NULL)
221 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
225 static int mds_unlink_unpack(struct ptlrpc_request *req, int offset,
226 struct mds_update_record *r)
228 struct mds_rec_unlink *rec;
231 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
232 lustre_swab_mds_rec_unlink);
236 r->ur_fsuid = rec->ul_fsuid;
237 r->ur_fsgid = rec->ul_fsgid;
238 r->ur_cap = rec->ul_cap;
239 r->ur_mode = rec->ul_mode;
240 r->ur_suppgid1 = rec->ul_suppgid;
242 r->ur_fid1 = &rec->ul_fid1;
243 r->ur_fid2 = &rec->ul_fid2;
244 r->ur_time = rec->ul_time;
246 LASSERT_REQSWAB (req, offset + 1);
247 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
248 if (r->ur_name == NULL)
250 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
254 static int mds_rename_unpack(struct ptlrpc_request *req, int offset,
255 struct mds_update_record *r)
257 struct mds_rec_rename *rec;
260 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
261 lustre_swab_mds_rec_unlink);
265 r->ur_fsuid = rec->rn_fsuid;
266 r->ur_fsgid = rec->rn_fsgid;
267 r->ur_cap = rec->rn_cap;
268 r->ur_suppgid1 = rec->rn_suppgid1;
269 r->ur_suppgid2 = rec->rn_suppgid2;
270 r->ur_fid1 = &rec->rn_fid1;
271 r->ur_fid2 = &rec->rn_fid2;
272 r->ur_time = rec->rn_time;
274 LASSERT_REQSWAB (req, offset + 1);
275 r->ur_name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
276 if (r->ur_name == NULL)
278 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
280 LASSERT_REQSWAB (req, offset + 2);
281 r->ur_tgt = lustre_msg_string(req->rq_reqmsg, offset + 2, 0);
282 if (r->ur_tgt == NULL)
284 r->ur_tgtlen = req->rq_reqmsg->buflens[offset + 2];
288 static int mds_open_unpack(struct ptlrpc_request *req, int offset,
289 struct mds_update_record *r)
291 struct mds_rec_create *rec;
294 rec = lustre_swab_reqbuf (req, offset, sizeof (*rec),
295 lustre_swab_mds_rec_create);
299 r->ur_fsuid = rec->cr_fsuid;
300 r->ur_fsgid = rec->cr_fsgid;
301 r->ur_cap = rec->cr_cap;
302 r->ur_fid1 = &rec->cr_fid;
303 r->ur_fid2 = &rec->cr_replayfid;
304 r->ur_mode = rec->cr_mode;
305 r->ur_rdev = rec->cr_rdev;
306 r->ur_time = rec->cr_time;
307 r->ur_flags = rec->cr_flags;
308 r->ur_suppgid1 = rec->cr_suppgid;
311 LASSERT_REQSWAB (req, offset + 1);
312 r->ur_name = lustre_msg_string (req->rq_reqmsg, offset + 1, 0);
313 if (r->ur_name == NULL)
315 r->ur_namelen = req->rq_reqmsg->buflens[offset + 1];
317 LASSERT_REQSWAB (req, offset + 2);
318 if (req->rq_reqmsg->bufcount > offset + 2) {
319 r->ur_eadata = lustre_msg_buf(req->rq_reqmsg, offset + 2, 0);
320 if (r->ur_eadata == NULL)
322 r->ur_eadatalen = req->rq_reqmsg->buflens[offset + 2];
327 typedef int (*update_unpacker)(struct ptlrpc_request *req, int offset,
328 struct mds_update_record *r);
330 static update_unpacker mds_unpackers[REINT_MAX + 1] = {
331 [REINT_SETATTR] mds_setattr_unpack,
332 [REINT_CREATE] mds_create_unpack,
333 [REINT_LINK] mds_link_unpack,
334 [REINT_UNLINK] mds_unlink_unpack,
335 [REINT_RENAME] mds_rename_unpack,
336 [REINT_OPEN] mds_open_unpack,
339 int mds_update_unpack(struct ptlrpc_request *req, int offset,
340 struct mds_update_record *rec)
347 /* NB don't lustre_swab_reqbuf() here. We're just taking a peek
348 * and we want to leave it to the specific unpacker once we've
349 * identified the message type */
350 opcodep = lustre_msg_buf (req->rq_reqmsg, offset, sizeof (*opcodep));
355 if (lustre_msg_swabbed (req->rq_reqmsg))
358 if (opcode > REINT_MAX ||
359 mds_unpackers[opcode] == NULL) {
360 CERROR ("Unexpected opcode %d\n", opcode);
364 rec->ur_opcode = opcode;
365 rc = mds_unpackers[opcode](req, offset, rec);