2 * linux/mds/mds_reint.c
4 * Lustre Metadata Server (mds) reintegration routines
6 * Copyright (C) 2002 Cluster File Systems, Inc.
7 * author: Peter Braam <braam@clusterfs.com>
9 * This code is issued under the GNU General Public License.
10 * See the file COPYING in this distribution
14 // XXX - add transaction sequence numbers
18 #include <linux/version.h>
19 #include <linux/module.h>
21 #include <linux/stat.h>
22 #include <linux/locks.h>
23 #include <linux/ext2_fs.h>
24 #include <linux/quotaops.h>
25 #include <asm/unistd.h>
26 #include <asm/uaccess.h>
27 #include <linux/obd_support.h>
28 #include <linux/obd.h>
29 #include <linux/lustre_lib.h>
30 #include <linux/lustre_idl.h>
31 #include <linux/lustre_mds.h>
32 #include <linux/obd_class.h>
34 extern struct ptlrpc_request *mds_prep_req(int size, int opcode, int namelen, char *name, int tgtlen, char *tgt);
36 static int mds_reint_setattr(struct mds_update_record *rec, struct ptlrpc_request *req)
41 de = mds_fid2dentry(req->rq_obd, rec->ur_fid1, &mnt);
43 req->rq_rephdr->status = -ESTALE;
47 printk("mds_setattr: ino %ld\n", de->d_inode->i_ino);
48 if ( de->d_inode->i_op->setattr ) {
49 req->rq_rephdr->status =
50 de->d_inode->i_op->setattr(de, &rec->ur_iattr);
52 req->rq_rephdr->status =
53 inode_setattr(de->d_inode, &rec->ur_iattr);
62 XXX nasty hack: store the object id in the first two
65 static inline void mds_store_objid(struct inode *inode, __u64 *id)
67 memcpy(&inode->u.ext2_i.i_data, id, sizeof(*id));
71 static int mds_reint_create(struct mds_update_record *rec,
72 struct ptlrpc_request *req)
75 int type = rec->ur_mode & S_IFMT;
77 struct mds_rep *rep = req->rq_rep.mds;
78 struct dentry *dchild;
82 de = mds_fid2dentry(req->rq_obd, rec->ur_fid1, &mnt);
84 req->rq_rephdr->status = -ESTALE;
88 printk("mds_reint_create: ino %ld\n", de->d_inode->i_ino);
90 dchild = lookup_one_len(rec->ur_name, de, rec->ur_namelen - 1);
93 printk(__FUNCTION__ "child lookup error %d\n", rc);
95 req->rq_rephdr->status = -ESTALE;
100 if (dchild->d_inode) {
101 printk(__FUNCTION__ "child exists (dir %ld, name %s\n",
102 de->d_inode->i_ino, rec->ur_name);
104 req->rq_rephdr->status = -ESTALE;
111 rc = vfs_create(de->d_inode, dchild, rec->ur_mode);
117 rc = vfs_mkdir(de->d_inode, dchild, rec->ur_mode);
122 rc = vfs_symlink(de->d_inode, dchild, rec->ur_tgt);
130 int rdev = rec->ur_id;
131 rc = vfs_mknod(de->d_inode, dchild, rec->ur_mode, rdev);
137 req->rq_rephdr->status = rc;
140 mds_store_objid(dchild->d_inode, &rec->ur_id);
141 dchild->d_inode->i_atime = rec->ur_time;
142 dchild->d_inode->i_ctime = rec->ur_time;
143 dchild->d_inode->i_mtime = rec->ur_time;
144 dchild->d_inode->i_uid = rec->ur_uid;
145 dchild->d_inode->i_gid = rec->ur_gid;
146 rep->ino = dchild->d_inode->i_ino;
155 static int mds_reint_unlink(struct mds_update_record *rec,
156 struct ptlrpc_request *req)
158 struct vfsmount *mnt;
160 struct dentry *dchild;
164 de = mds_fid2dentry(req->rq_obd, rec->ur_fid1, &mnt);
166 req->rq_rephdr->status = -ESTALE;
170 printk("mds_reint_create: ino %ld\n", de->d_inode->i_ino);
172 dchild = lookup_one_len(rec->ur_name, de, rec->ur_namelen - 1);
173 rc = PTR_ERR(dchild);
174 if (IS_ERR(dchild)) {
175 printk(__FUNCTION__ ": child lookup error %d\n", rc);
177 req->rq_rephdr->status = -ESTALE;
182 if (!dchild->d_inode) {
183 printk(__FUNCTION__ ": child doesn't exist (dir %ld, name %s\n",
184 de->d_inode->i_ino, rec->ur_name);
186 req->rq_rephdr->status = -ESTALE;
191 switch (de->d_inode->i_mode & S_IFMT) {
193 rc = vfs_rmdir(de->d_inode, dchild);
197 rc = vfs_unlink(de->d_inode, dchild);
203 req->rq_rephdr->status = rc;
210 static int mds_reint_link(struct mds_update_record *rec,
211 struct ptlrpc_request *req)
213 struct vfsmount *mnt;
214 struct dentry *de_src = NULL;
215 struct dentry *de_tgt_dir = NULL;
216 struct dentry *dchild = NULL;
221 de_src = mds_fid2dentry(req->rq_obd, rec->ur_fid1, &mnt);
222 if (IS_ERR(de_src)) {
227 de_tgt_dir = mds_fid2dentry(req->rq_obd, rec->ur_fid2, &mnt);
228 if (IS_ERR(de_tgt_dir)) {
234 dchild = lookup_one_len(rec->ur_name, de_tgt_dir, rec->ur_namelen - 1);
235 if (IS_ERR(dchild)) {
236 printk(__FUNCTION__ ": child lookup error %d\n", rc);
237 req->rq_rephdr->status = -ESTALE;
241 if (dchild->d_inode) {
242 printk(__FUNCTION__ ": child exists (dir %ld, name %s\n",
243 de_tgt_dir->d_inode->i_ino, rec->ur_name);
248 rc = vfs_link(de_src, de_tgt_dir->d_inode, dchild);
251 req->rq_rephdr->status = rc;
260 static int mds_reint_rename(struct mds_update_record *rec,
261 struct ptlrpc_request *req)
263 struct vfsmount *mnt;
264 struct dentry *de_srcdir = NULL;
265 struct dentry *de_tgtdir = NULL;
266 struct dentry *de_old = NULL;
267 struct dentry *de_new = NULL;
272 de_srcdir = mds_fid2dentry(req->rq_obd, rec->ur_fid1, &mnt);
273 if (IS_ERR(de_srcdir)) {
278 de_tgtdir = mds_fid2dentry(req->rq_obd, rec->ur_fid2, &mnt);
279 if (IS_ERR(de_tgtdir)) {
285 de_old = lookup_one_len(rec->ur_name, de_srcdir, rec->ur_namelen - 1);
286 if (IS_ERR(de_old)) {
287 printk(__FUNCTION__ "child lookup error %d\n", rc);
291 de_new = lookup_one_len(rec->ur_tgt, de_tgtdir, rec->ur_tgtlen - 1);
292 if (IS_ERR(de_new)) {
293 printk(__FUNCTION__ "child lookup error %d\n", rc);
297 rc = vfs_rename(de_srcdir->d_inode, de_old, de_tgtdir->d_inode, de_new);
300 req->rq_rephdr->status = rc;
309 typedef int (*mds_reinter)(struct mds_update_record *, struct ptlrpc_request*);
311 static mds_reinter reinters[REINT_MAX+1] = {
312 [REINT_SETATTR] mds_reint_setattr,
313 [REINT_CREATE] mds_reint_create,
314 [REINT_UNLINK] mds_reint_unlink,
315 [REINT_LINK] mds_reint_link,
316 [REINT_RENAME] mds_reint_rename
319 int mds_reint_rec(struct mds_update_record *rec, struct ptlrpc_request *req)
323 if (rec->ur_opcode < 0 || rec->ur_opcode > REINT_MAX) {
324 printk(__FUNCTION__ "opcode %d not valid\n",
326 rc = req->rq_status = -EINVAL;
330 rc = mds_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep.mds,
331 &req->rq_replen, &req->rq_repbuf);
334 printk("mds: out of memory\n");
335 rc = req->rq_status = -ENOMEM;
338 req->rq_rephdr->seqno = req->rq_reqhdr->seqno;
340 rc = reinters[rec->ur_opcode](rec, req);