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)
40 de = mds_fid2dentry(req->rq_obd, rec->ur_fid1, NULL);
42 req->rq_rephdr->status = -ESTALE;
46 printk("mds_setattr: ino %ld\n", de->d_inode->i_ino);
48 /* a _really_ horrible hack to avoid removing the data stored
49 in the block pointers; this data is the object id
50 this will go into an extended attribute at some point.
52 if ( rec->ur_iattr.ia_valid & ATTR_SIZE ) {
53 /* ATTR_SIZE would invoke truncate: clear it */
54 rec->ur_iattr.ia_valid &= ~ATTR_SIZE;
55 de->d_inode->i_size = rec->ur_iattr.ia_size;
56 /* make sure _something_ gets set - so new inode
57 goes to disk (probably won't work over XFS */
58 if (!rec->ur_iattr.ia_valid & ATTR_MODE) {
59 rec->ur_iattr.ia_valid |= ATTR_MODE;
60 rec->ur_iattr.ia_mode = de->d_inode->i_mode;
63 if ( de->d_inode->i_op->setattr ) {
64 req->rq_rephdr->status =
65 de->d_inode->i_op->setattr(de, &rec->ur_iattr);
67 req->rq_rephdr->status =
68 inode_setattr(de->d_inode, &rec->ur_iattr);
77 XXX nasty hack: store the object id in the first two
80 static inline void mds_store_objid(struct inode *inode, __u64 *id)
82 memcpy(&inode->u.ext2_i.i_data, id, sizeof(*id));
86 static int mds_reint_create(struct mds_update_record *rec,
87 struct ptlrpc_request *req)
89 int type = rec->ur_mode & S_IFMT;
91 struct mds_rep *rep = req->rq_rep.mds;
92 struct dentry *dchild;
96 de = mds_fid2dentry(req->rq_obd, rec->ur_fid1, NULL);
98 req->rq_rephdr->status = -ESTALE;
102 printk("mds_reint_create: ino %ld\n", de->d_inode->i_ino);
104 dchild = lookup_one_len(rec->ur_name, de, rec->ur_namelen - 1);
105 rc = PTR_ERR(dchild);
106 if (IS_ERR(dchild)) {
107 printk(__FUNCTION__ "child lookup error %d\n", rc);
109 req->rq_rephdr->status = -ESTALE;
114 if (dchild->d_inode) {
115 printk(__FUNCTION__ "child exists (dir %ld, name %s\n",
116 de->d_inode->i_ino, rec->ur_name);
118 req->rq_rephdr->status = -ESTALE;
125 rc = vfs_create(de->d_inode, dchild, rec->ur_mode);
131 rc = vfs_mkdir(de->d_inode, dchild, rec->ur_mode);
136 rc = vfs_symlink(de->d_inode, dchild, rec->ur_tgt);
144 int rdev = rec->ur_id;
145 rc = vfs_mknod(de->d_inode, dchild, rec->ur_mode, rdev);
151 req->rq_rephdr->status = rc;
154 mds_store_objid(dchild->d_inode, &rec->ur_id);
155 dchild->d_inode->i_atime = rec->ur_time;
156 dchild->d_inode->i_ctime = rec->ur_time;
157 dchild->d_inode->i_mtime = rec->ur_time;
158 dchild->d_inode->i_uid = rec->ur_uid;
159 dchild->d_inode->i_gid = rec->ur_gid;
160 rep->ino = dchild->d_inode->i_ino;
169 static int mds_reint_unlink(struct mds_update_record *rec,
170 struct ptlrpc_request *req)
173 struct dentry *dchild;
177 de = mds_fid2dentry(req->rq_obd, rec->ur_fid1, NULL);
179 req->rq_rephdr->status = -ESTALE;
183 printk("mds_reint_create: ino %ld\n", de->d_inode->i_ino);
185 dchild = lookup_one_len(rec->ur_name, de, rec->ur_namelen - 1);
186 rc = PTR_ERR(dchild);
187 if (IS_ERR(dchild)) {
188 printk(__FUNCTION__ ": child lookup error %d\n", rc);
190 req->rq_rephdr->status = -ESTALE;
195 if (!dchild->d_inode) {
196 printk(__FUNCTION__ ": child doesn't exist (dir %ld, name %s\n",
197 de->d_inode->i_ino, rec->ur_name);
199 req->rq_rephdr->status = -ESTALE;
204 switch (dchild->d_inode->i_mode & S_IFMT) {
206 rc = vfs_rmdir(de->d_inode, dchild);
210 rc = vfs_unlink(de->d_inode, dchild);
216 req->rq_rephdr->status = rc;
223 static int mds_reint_link(struct mds_update_record *rec,
224 struct ptlrpc_request *req)
226 struct dentry *de_src = NULL;
227 struct dentry *de_tgt_dir = NULL;
228 struct dentry *dchild = NULL;
233 de_src = mds_fid2dentry(req->rq_obd, rec->ur_fid1, NULL);
234 if (IS_ERR(de_src)) {
239 de_tgt_dir = mds_fid2dentry(req->rq_obd, rec->ur_fid2, NULL);
240 if (IS_ERR(de_tgt_dir)) {
246 dchild = lookup_one_len(rec->ur_name, de_tgt_dir, rec->ur_namelen - 1);
247 if (IS_ERR(dchild)) {
248 printk(__FUNCTION__ ": child lookup error %d\n", rc);
249 req->rq_rephdr->status = -ESTALE;
253 if (dchild->d_inode) {
254 printk(__FUNCTION__ ": child exists (dir %ld, name %s\n",
255 de_tgt_dir->d_inode->i_ino, rec->ur_name);
260 rc = vfs_link(de_src, de_tgt_dir->d_inode, dchild);
263 req->rq_rephdr->status = rc;
272 static int mds_reint_rename(struct mds_update_record *rec,
273 struct ptlrpc_request *req)
275 struct dentry *de_srcdir = NULL;
276 struct dentry *de_tgtdir = NULL;
277 struct dentry *de_old = NULL;
278 struct dentry *de_new = NULL;
283 de_srcdir = mds_fid2dentry(req->rq_obd, rec->ur_fid1, NULL);
284 if (IS_ERR(de_srcdir)) {
289 de_tgtdir = mds_fid2dentry(req->rq_obd, rec->ur_fid2, NULL);
290 if (IS_ERR(de_tgtdir)) {
296 de_old = lookup_one_len(rec->ur_name, de_srcdir, rec->ur_namelen - 1);
297 if (IS_ERR(de_old)) {
298 printk(__FUNCTION__ "child lookup error %d\n", rc);
302 de_new = lookup_one_len(rec->ur_tgt, de_tgtdir, rec->ur_tgtlen - 1);
303 if (IS_ERR(de_new)) {
304 printk(__FUNCTION__ "child lookup error %d\n", rc);
308 rc = vfs_rename(de_srcdir->d_inode, de_old, de_tgtdir->d_inode, de_new);
311 req->rq_rephdr->status = rc;
320 typedef int (*mds_reinter)(struct mds_update_record *, struct ptlrpc_request*);
322 static mds_reinter reinters[REINT_MAX+1] = {
323 [REINT_SETATTR] mds_reint_setattr,
324 [REINT_CREATE] mds_reint_create,
325 [REINT_UNLINK] mds_reint_unlink,
326 [REINT_LINK] mds_reint_link,
327 [REINT_RENAME] mds_reint_rename
330 int mds_reint_rec(struct mds_update_record *rec, struct ptlrpc_request *req)
334 if (rec->ur_opcode < 0 || rec->ur_opcode > REINT_MAX) {
335 printk(__FUNCTION__ "opcode %d not valid\n",
337 rc = req->rq_status = -EINVAL;
341 rc = mds_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep.mds,
342 &req->rq_replen, &req->rq_repbuf);
345 printk("mds: out of memory\n");
346 rc = req->rq_status = -ENOMEM;
349 req->rq_rephdr->seqno = req->rq_reqhdr->seqno;
351 rc = reinters[rec->ur_opcode](rec, req);