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);
49 /* a _really_ horrible hack to avoid removing the data stored
50 in the block pointers; this data is the object id
51 this will go into an extended attribute at some point.
53 if ( rec->ur_iattr.ia_valid & ATTR_SIZE ) {
54 /* ATTR_SIZE would invoke truncate: clear it */
55 rec->ur_iattr.ia_valid &= ~ATTR_SIZE;
56 de->d_inode->i_size = rec->ur_iattr.ia_size;
57 /* make sure _something_ gets set - so new inode
58 goes to disk (probably won't work over XFS */
59 if (!rec->ur_iattr.ia_valid & ATTR_MODE) {
60 rec->ur_iattr.ia_valid |= ATTR_MODE;
61 rec->ur_iattr.ia_mode = de->d_inode->i_mode;
64 if ( de->d_inode->i_op->setattr ) {
65 req->rq_rephdr->status =
66 de->d_inode->i_op->setattr(de, &rec->ur_iattr);
68 req->rq_rephdr->status =
69 inode_setattr(de->d_inode, &rec->ur_iattr);
78 XXX nasty hack: store the object id in the first two
81 static inline void mds_store_objid(struct inode *inode, __u64 *id)
83 memcpy(&inode->u.ext2_i.i_data, id, sizeof(*id));
87 static int mds_reint_create(struct mds_update_record *rec,
88 struct ptlrpc_request *req)
91 int type = rec->ur_mode & S_IFMT;
93 struct mds_rep *rep = req->rq_rep.mds;
94 struct dentry *dchild;
98 de = mds_fid2dentry(req->rq_obd, rec->ur_fid1, &mnt);
100 req->rq_rephdr->status = -ESTALE;
104 printk("mds_reint_create: ino %ld\n", de->d_inode->i_ino);
106 dchild = lookup_one_len(rec->ur_name, de, rec->ur_namelen - 1);
107 rc = PTR_ERR(dchild);
108 if (IS_ERR(dchild)) {
109 printk(__FUNCTION__ "child lookup error %d\n", rc);
111 req->rq_rephdr->status = -ESTALE;
116 if (dchild->d_inode) {
117 printk(__FUNCTION__ "child exists (dir %ld, name %s\n",
118 de->d_inode->i_ino, rec->ur_name);
120 req->rq_rephdr->status = -ESTALE;
127 rc = vfs_create(de->d_inode, dchild, rec->ur_mode);
133 rc = vfs_mkdir(de->d_inode, dchild, rec->ur_mode);
138 rc = vfs_symlink(de->d_inode, dchild, rec->ur_tgt);
146 int rdev = rec->ur_id;
147 rc = vfs_mknod(de->d_inode, dchild, rec->ur_mode, rdev);
153 req->rq_rephdr->status = rc;
156 mds_store_objid(dchild->d_inode, &rec->ur_id);
157 dchild->d_inode->i_atime = rec->ur_time;
158 dchild->d_inode->i_ctime = rec->ur_time;
159 dchild->d_inode->i_mtime = rec->ur_time;
160 dchild->d_inode->i_uid = rec->ur_uid;
161 dchild->d_inode->i_gid = rec->ur_gid;
162 rep->ino = dchild->d_inode->i_ino;
171 static int mds_reint_unlink(struct mds_update_record *rec,
172 struct ptlrpc_request *req)
174 struct vfsmount *mnt;
176 struct dentry *dchild;
180 de = mds_fid2dentry(req->rq_obd, rec->ur_fid1, &mnt);
182 req->rq_rephdr->status = -ESTALE;
186 printk("mds_reint_create: ino %ld\n", de->d_inode->i_ino);
188 dchild = lookup_one_len(rec->ur_name, de, rec->ur_namelen - 1);
189 rc = PTR_ERR(dchild);
190 if (IS_ERR(dchild)) {
191 printk(__FUNCTION__ ": child lookup error %d\n", rc);
193 req->rq_rephdr->status = -ESTALE;
198 if (!dchild->d_inode) {
199 printk(__FUNCTION__ ": child doesn't exist (dir %ld, name %s\n",
200 de->d_inode->i_ino, rec->ur_name);
202 req->rq_rephdr->status = -ESTALE;
207 switch (dchild->d_inode->i_mode & S_IFMT) {
209 rc = vfs_rmdir(de->d_inode, dchild);
213 rc = vfs_unlink(de->d_inode, dchild);
219 req->rq_rephdr->status = rc;
226 static int mds_reint_link(struct mds_update_record *rec,
227 struct ptlrpc_request *req)
229 struct vfsmount *mnt;
230 struct dentry *de_src = NULL;
231 struct dentry *de_tgt_dir = NULL;
232 struct dentry *dchild = NULL;
237 de_src = mds_fid2dentry(req->rq_obd, rec->ur_fid1, &mnt);
238 if (IS_ERR(de_src)) {
243 de_tgt_dir = mds_fid2dentry(req->rq_obd, rec->ur_fid2, &mnt);
244 if (IS_ERR(de_tgt_dir)) {
250 dchild = lookup_one_len(rec->ur_name, de_tgt_dir, rec->ur_namelen - 1);
251 if (IS_ERR(dchild)) {
252 printk(__FUNCTION__ ": child lookup error %d\n", rc);
253 req->rq_rephdr->status = -ESTALE;
257 if (dchild->d_inode) {
258 printk(__FUNCTION__ ": child exists (dir %ld, name %s\n",
259 de_tgt_dir->d_inode->i_ino, rec->ur_name);
264 rc = vfs_link(de_src, de_tgt_dir->d_inode, dchild);
267 req->rq_rephdr->status = rc;
276 static int mds_reint_rename(struct mds_update_record *rec,
277 struct ptlrpc_request *req)
279 struct vfsmount *mnt;
280 struct dentry *de_srcdir = NULL;
281 struct dentry *de_tgtdir = NULL;
282 struct dentry *de_old = NULL;
283 struct dentry *de_new = NULL;
288 de_srcdir = mds_fid2dentry(req->rq_obd, rec->ur_fid1, &mnt);
289 if (IS_ERR(de_srcdir)) {
294 de_tgtdir = mds_fid2dentry(req->rq_obd, rec->ur_fid2, &mnt);
295 if (IS_ERR(de_tgtdir)) {
301 de_old = lookup_one_len(rec->ur_name, de_srcdir, rec->ur_namelen - 1);
302 if (IS_ERR(de_old)) {
303 printk(__FUNCTION__ "child lookup error %d\n", rc);
307 de_new = lookup_one_len(rec->ur_tgt, de_tgtdir, rec->ur_tgtlen - 1);
308 if (IS_ERR(de_new)) {
309 printk(__FUNCTION__ "child lookup error %d\n", rc);
313 rc = vfs_rename(de_srcdir->d_inode, de_old, de_tgtdir->d_inode, de_new);
316 req->rq_rephdr->status = rc;
325 typedef int (*mds_reinter)(struct mds_update_record *, struct ptlrpc_request*);
327 static mds_reinter reinters[REINT_MAX+1] = {
328 [REINT_SETATTR] mds_reint_setattr,
329 [REINT_CREATE] mds_reint_create,
330 [REINT_UNLINK] mds_reint_unlink,
331 [REINT_LINK] mds_reint_link,
332 [REINT_RENAME] mds_reint_rename
335 int mds_reint_rec(struct mds_update_record *rec, struct ptlrpc_request *req)
339 if (rec->ur_opcode < 0 || rec->ur_opcode > REINT_MAX) {
340 printk(__FUNCTION__ "opcode %d not valid\n",
342 rc = req->rq_status = -EINVAL;
346 rc = mds_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep.mds,
347 &req->rq_replen, &req->rq_repbuf);
350 printk("mds: out of memory\n");
351 rc = req->rq_status = -ENOMEM;
354 req->rq_rephdr->seqno = req->rq_reqhdr->seqno;
356 rc = reinters[rec->ur_opcode](rec, req);