1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * linux/mds/mds_reint.c
6 * Lustre Metadata Server (mds) reintegration routines
8 * Copyright (C) 2002 Cluster File Systems, Inc.
9 * author: Peter Braam <braam@clusterfs.com>
11 * This code is issued under the GNU General Public License.
12 * See the file COPYING in this distribution
16 // XXX - add transaction sequence numbers
20 #include <linux/version.h>
21 #include <linux/module.h>
23 #include <linux/stat.h>
24 #include <linux/locks.h>
25 #include <linux/quotaops.h>
26 #include <asm/unistd.h>
27 #include <asm/uaccess.h>
29 #define DEBUG_SUBSYSTEM S_MDS
31 #include <linux/obd_support.h>
32 #include <linux/obd_class.h>
33 #include <linux/obd.h>
34 #include <linux/lustre_lib.h>
35 #include <linux/lustre_idl.h>
36 #include <linux/lustre_mds.h>
37 #include <linux/obd_class.h>
39 extern struct ptlrpc_request *mds_prep_req(int size, int opcode, int namelen, char *name, int tgtlen, char *tgt);
41 static int mds_reint_setattr(struct mds_update_record *rec, struct ptlrpc_request *req)
45 struct mds_obd *mds = &req->rq_obd->u.mds;
47 de = mds_fid2dentry(mds, rec->ur_fid1, NULL);
48 if (IS_ERR(de) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_SETATTR)) {
49 req->rq_rephdr->status = -ESTALE;
54 CDEBUG(D_INODE, "ino %ld\n", inode->i_ino);
56 mds_fs_setattr(mds, inode, NULL, &rec->ur_iattr);
58 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_SETATTR_WRITE, inode->i_sb->s_dev);
60 if (inode->i_op->setattr)
61 req->rq_rephdr->status = inode->i_op->setattr(de, &rec->ur_iattr);
63 req->rq_rephdr->status = inode_setattr(inode, &rec->ur_iattr);
69 static int mds_reint_create(struct mds_update_record *rec,
70 struct ptlrpc_request *req)
72 int type = rec->ur_mode & S_IFMT;
73 struct dentry *de = NULL;
74 struct mds_rep *rep = req->rq_rep.mds;
75 struct mds_obd *mds = &req->rq_obd->u.mds;
76 struct dentry *dchild = NULL;
81 de = mds_fid2dentry(mds, rec->ur_fid1, NULL);
82 if (IS_ERR(de) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_CREATE)) {
84 GOTO(out_reint_create, (rc = -ESTALE));
87 CDEBUG(D_INODE, "ino %ld\n", dir->i_ino);
89 dchild = lookup_one_len(rec->ur_name, de, rec->ur_namelen - 1);
91 CERROR("child lookup error %ld\n", PTR_ERR(dchild));
93 GOTO(out_reint_create, (rc = -ESTALE));
96 if (dchild->d_inode) {
97 CERROR("child exists (dir %ld, name %s)\n",
98 dir->i_ino, rec->ur_name);
100 GOTO(out_reint_create, (rc = -EEXIST));
103 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_CREATE_WRITE, dir->i_sb->s_dev);
107 rc = vfs_create(dir, dchild, rec->ur_mode);
112 rc = vfs_mkdir(dir, dchild, rec->ur_mode);
117 rc = vfs_symlink(dir, dchild, rec->ur_tgt);
125 int rdev = rec->ur_id;
126 rc = vfs_mknod(dir, dchild, rec->ur_mode, rdev);
134 rc = mds_fs_set_objid(mds, dchild->d_inode,
136 dchild->d_inode->i_atime = rec->ur_time;
137 dchild->d_inode->i_ctime = rec->ur_time;
138 dchild->d_inode->i_mtime = rec->ur_time;
139 dchild->d_inode->i_uid = rec->ur_uid;
140 dchild->d_inode->i_gid = rec->ur_gid;
141 rep->ino = dchild->d_inode->i_ino;
142 rep->generation = dchild->d_inode->i_generation;
144 CERROR("error during create: %d\n", rc);
149 req->rq_rephdr->status = rc;
155 static int mds_reint_unlink(struct mds_update_record *rec,
156 struct ptlrpc_request *req)
158 struct dentry *de = NULL;
159 struct dentry *dchild = NULL;
160 struct mds_obd *mds = &req->rq_obd->u.mds;
165 de = mds_fid2dentry(mds, rec->ur_fid1, NULL);
166 if (IS_ERR(de) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNLINK)) {
168 GOTO(out_unlink, (rc = -ESTALE));
171 CDEBUG(D_INODE, "ino %ld\n", dir->i_ino);
173 dchild = lookup_one_len(rec->ur_name, de, rec->ur_namelen - 1);
174 if (IS_ERR(dchild)) {
175 CERROR("child lookup error %ld\n", PTR_ERR(dchild));
177 GOTO(out_unlink, (rc = -ESTALE));
180 if (!dchild->d_inode) {
181 CERROR("child doesn't exist (dir %ld, name %s\n",
182 dir->i_ino, rec->ur_name);
184 GOTO(out_unlink, (rc = -ESTALE));
187 if (dchild->d_inode->i_ino != rec->ur_fid2->id)
189 if (dchild->d_inode->i_generation != rec->ur_fid2->generation)
192 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_UNLINK_WRITE, dir->i_sb->s_dev);
194 switch (dchild->d_inode->i_mode & S_IFMT) {
196 rc = vfs_rmdir(dir, dchild);
200 rc = vfs_unlink(dir, dchild);
206 req->rq_rephdr->status = rc;
212 static int mds_reint_link(struct mds_update_record *rec,
213 struct ptlrpc_request *req)
215 struct dentry *de_src = NULL;
216 struct dentry *de_tgt_dir = NULL;
217 struct dentry *dchild = NULL;
221 de_src = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid1, NULL);
222 if (IS_ERR(de_src) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_LINK)) {
223 GOTO(out_link, (rc = -ESTALE));
226 de_tgt_dir = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid2, NULL);
227 if (IS_ERR(de_tgt_dir)) {
228 GOTO(out_link, (rc = -ESTALE));
231 dchild = lookup_one_len(rec->ur_name, de_tgt_dir, rec->ur_namelen - 1);
232 if (IS_ERR(dchild)) {
233 CERROR("child lookup error %ld\n", PTR_ERR(dchild));
234 GOTO(out_link, (rc = -ESTALE));
237 if (dchild->d_inode) {
238 CERROR("child exists (dir %ld, name %s\n",
239 de_tgt_dir->d_inode->i_ino, rec->ur_name);
240 GOTO(out_link, (rc = -EEXIST));
243 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE,
244 dchild->d_inode->i_sb->s_dev);
246 rc = vfs_link(de_src, de_tgt_dir->d_inode, dchild);
250 req->rq_rephdr->status = rc;
258 static int mds_reint_rename(struct mds_update_record *rec,
259 struct ptlrpc_request *req)
261 struct dentry *de_srcdir = NULL;
262 struct dentry *de_tgtdir = NULL;
263 struct dentry *de_old = NULL;
264 struct dentry *de_new = NULL;
268 de_srcdir = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid1, NULL);
269 if (IS_ERR(de_srcdir)) {
270 GOTO(out_rename, (rc = -ESTALE));
273 de_tgtdir = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid2, NULL);
274 if (IS_ERR(de_tgtdir)) {
275 GOTO(out_rename, (rc = -ESTALE));
278 de_old = lookup_one_len(rec->ur_name, de_srcdir, rec->ur_namelen - 1);
279 if (IS_ERR(de_old)) {
280 CERROR("child lookup error %ld\n", PTR_ERR(de_old));
281 GOTO(out_rename, (rc = -ESTALE));
284 de_new = lookup_one_len(rec->ur_tgt, de_tgtdir, rec->ur_tgtlen - 1);
285 if (IS_ERR(de_new)) {
286 CERROR("child lookup error %ld\n", PTR_ERR(de_new));
287 GOTO(out_rename, (rc = -ESTALE));
290 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_RENAME_WRITE,
291 de_srcdir->d_inode->i_sb->s_dev);
293 rc = vfs_rename(de_srcdir->d_inode, de_old, de_tgtdir->d_inode, de_new);
297 req->rq_rephdr->status = rc;
305 typedef int (*mds_reinter)(struct mds_update_record *, struct ptlrpc_request*);
307 static mds_reinter reinters[REINT_MAX+1] = {
308 [REINT_SETATTR] mds_reint_setattr,
309 [REINT_CREATE] mds_reint_create,
310 [REINT_UNLINK] mds_reint_unlink,
311 [REINT_LINK] mds_reint_link,
312 [REINT_RENAME] mds_reint_rename,
315 int mds_reint_rec(struct mds_update_record *rec, struct ptlrpc_request *req)
319 if (rec->ur_opcode < 0 || rec->ur_opcode > REINT_MAX) {
320 CERROR("opcode %d not valid\n", rec->ur_opcode);
321 rc = req->rq_status = -EINVAL;
325 rc = mds_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep,
326 &req->rq_replen, &req->rq_repbuf);
328 CERROR("mds: out of memory\n");
329 rc = req->rq_status = -ENOMEM;
332 req->rq_rephdr->xid = req->rq_reqhdr->xid;
334 rc = reinters[rec->ur_opcode](rec, req);