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>
28 #define DEBUG_SUBSYSTEM S_MDS
30 #include <linux/obd_support.h>
31 #include <linux/obd.h>
32 #include <linux/lustre_lib.h>
33 #include <linux/lustre_idl.h>
34 #include <linux/lustre_mds.h>
35 #include <linux/obd_class.h>
37 extern struct ptlrpc_request *mds_prep_req(int size, int opcode, int namelen, char *name, int tgtlen, char *tgt);
39 static int mds_reint_setattr(struct mds_update_record *rec, struct ptlrpc_request *req)
43 de = mds_fid2dentry(req->rq_obd, rec->ur_fid1, NULL);
45 req->rq_rephdr->status = -ESTALE;
49 CDEBUG(D_INODE, "ino %ld\n", de->d_inode->i_ino);
51 /* a _really_ horrible hack to avoid removing the data stored
52 in the block pointers; this data is the object id
53 this will go into an extended attribute at some point.
55 if ( rec->ur_iattr.ia_valid & ATTR_SIZE ) {
56 /* ATTR_SIZE would invoke truncate: clear it */
57 rec->ur_iattr.ia_valid &= ~ATTR_SIZE;
58 de->d_inode->i_size = rec->ur_iattr.ia_size;
59 /* make sure _something_ gets set - so new inode
60 goes to disk (probably won't work over XFS */
61 if (!rec->ur_iattr.ia_valid & ATTR_MODE) {
62 rec->ur_iattr.ia_valid |= ATTR_MODE;
63 rec->ur_iattr.ia_mode = de->d_inode->i_mode;
66 if ( de->d_inode->i_op->setattr ) {
67 req->rq_rephdr->status =
68 de->d_inode->i_op->setattr(de, &rec->ur_iattr);
70 req->rq_rephdr->status =
71 inode_setattr(de->d_inode, &rec->ur_iattr);
80 XXX nasty hack: store the object id in the first two
83 static inline void mds_store_objid(struct inode *inode, __u64 *id)
85 memcpy(&inode->u.ext2_i.i_data, id, sizeof(*id));
89 static int mds_reint_create(struct mds_update_record *rec,
90 struct ptlrpc_request *req)
92 int type = rec->ur_mode & S_IFMT;
94 struct mds_rep *rep = req->rq_rep.mds;
95 struct dentry *dchild;
99 de = mds_fid2dentry(req->rq_obd, rec->ur_fid1, NULL);
101 req->rq_rephdr->status = -ESTALE;
105 CDEBUG(D_INODE, "ino %ld\n", de->d_inode->i_ino);
107 dchild = lookup_one_len(rec->ur_name, de, rec->ur_namelen - 1);
108 rc = PTR_ERR(dchild);
109 if (IS_ERR(dchild)) {
110 printk(__FUNCTION__ "child lookup error %d\n", rc);
112 req->rq_rephdr->status = -ESTALE;
117 if (dchild->d_inode) {
118 printk(__FUNCTION__ "child exists (dir %ld, name %s\n",
119 de->d_inode->i_ino, rec->ur_name);
121 req->rq_rephdr->status = -ESTALE;
128 rc = vfs_create(de->d_inode, dchild, rec->ur_mode);
134 rc = vfs_mkdir(de->d_inode, dchild, rec->ur_mode);
139 rc = vfs_symlink(de->d_inode, dchild, rec->ur_tgt);
147 int rdev = rec->ur_id;
148 rc = vfs_mknod(de->d_inode, dchild, rec->ur_mode, rdev);
154 req->rq_rephdr->status = rc;
157 mds_store_objid(dchild->d_inode, &rec->ur_id);
158 dchild->d_inode->i_atime = rec->ur_time;
159 dchild->d_inode->i_ctime = rec->ur_time;
160 dchild->d_inode->i_mtime = rec->ur_time;
161 dchild->d_inode->i_uid = rec->ur_uid;
162 dchild->d_inode->i_gid = rec->ur_gid;
163 rep->ino = dchild->d_inode->i_ino;
172 static int mds_reint_unlink(struct mds_update_record *rec,
173 struct ptlrpc_request *req)
176 struct dentry *dchild;
180 de = mds_fid2dentry(req->rq_obd, rec->ur_fid1, NULL);
182 req->rq_rephdr->status = -ESTALE;
186 CDEBUG(D_INODE, "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 dentry *de_src = NULL;
230 struct dentry *de_tgt_dir = NULL;
231 struct dentry *dchild = NULL;
236 de_src = mds_fid2dentry(req->rq_obd, rec->ur_fid1, NULL);
237 if (IS_ERR(de_src)) {
242 de_tgt_dir = mds_fid2dentry(req->rq_obd, rec->ur_fid2, NULL);
243 if (IS_ERR(de_tgt_dir)) {
249 dchild = lookup_one_len(rec->ur_name, de_tgt_dir, rec->ur_namelen - 1);
250 if (IS_ERR(dchild)) {
251 printk(__FUNCTION__ ": child lookup error %d\n", rc);
252 req->rq_rephdr->status = -ESTALE;
256 if (dchild->d_inode) {
257 printk(__FUNCTION__ ": child exists (dir %ld, name %s\n",
258 de_tgt_dir->d_inode->i_ino, rec->ur_name);
263 rc = vfs_link(de_src, de_tgt_dir->d_inode, dchild);
266 req->rq_rephdr->status = rc;
275 static int mds_reint_rename(struct mds_update_record *rec,
276 struct ptlrpc_request *req)
278 struct dentry *de_srcdir = NULL;
279 struct dentry *de_tgtdir = NULL;
280 struct dentry *de_old = NULL;
281 struct dentry *de_new = NULL;
286 de_srcdir = mds_fid2dentry(req->rq_obd, rec->ur_fid1, NULL);
287 if (IS_ERR(de_srcdir)) {
292 de_tgtdir = mds_fid2dentry(req->rq_obd, rec->ur_fid2, NULL);
293 if (IS_ERR(de_tgtdir)) {
299 de_old = lookup_one_len(rec->ur_name, de_srcdir, rec->ur_namelen - 1);
300 if (IS_ERR(de_old)) {
301 printk(__FUNCTION__ "child lookup error %d\n", rc);
305 de_new = lookup_one_len(rec->ur_tgt, de_tgtdir, rec->ur_tgtlen - 1);
306 if (IS_ERR(de_new)) {
307 printk(__FUNCTION__ "child lookup error %d\n", rc);
311 rc = vfs_rename(de_srcdir->d_inode, de_old, de_tgtdir->d_inode, de_new);
314 req->rq_rephdr->status = rc;
323 typedef int (*mds_reinter)(struct mds_update_record *, struct ptlrpc_request*);
325 static mds_reinter reinters[REINT_MAX+1] = {
326 [REINT_SETATTR] mds_reint_setattr,
327 [REINT_CREATE] mds_reint_create,
328 [REINT_UNLINK] mds_reint_unlink,
329 [REINT_LINK] mds_reint_link,
330 [REINT_RENAME] mds_reint_rename
333 int mds_reint_rec(struct mds_update_record *rec, struct ptlrpc_request *req)
337 if (rec->ur_opcode < 0 || rec->ur_opcode > REINT_MAX) {
338 printk(__FUNCTION__ "opcode %d not valid\n",
340 rc = req->rq_status = -EINVAL;
344 rc = mds_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep.mds,
345 &req->rq_replen, &req->rq_repbuf);
348 printk("mds: out of memory\n");
349 rc = req->rq_status = -ENOMEM;
352 req->rq_rephdr->seqno = req->rq_reqhdr->seqno;
354 rc = reinters[rec->ur_opcode](rec, req);