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 static int mds_reint_setattr(struct mds_update_record *rec,
40 struct ptlrpc_request *req)
42 struct mds_obd *mds = &req->rq_obd->u.mds;
45 de = mds_fid2dentry(mds, rec->ur_fid1, NULL);
46 if (IS_ERR(de) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_SETATTR)) {
47 req->rq_status = -ESTALE;
51 CDEBUG(D_INODE, "ino %ld\n", de->d_inode->i_ino);
53 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_SETATTR_WRITE,
54 de->d_inode->i_sb->s_dev);
56 req->rq_status = mds_fs_setattr(mds, de, NULL, &rec->ur_iattr);
62 static int mds_reint_create(struct mds_update_record *rec,
63 struct ptlrpc_request *req)
65 struct dentry *de = NULL;
66 struct mds_obd *mds = &req->rq_obd->u.mds;
67 struct dentry *dchild = NULL;
70 int rc = 0, type = rec->ur_mode & S_IFMT;
73 de = mds_fid2dentry(mds, rec->ur_fid1, NULL);
74 if (IS_ERR(de) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_CREATE)) {
76 GOTO(out_reint_create, (rc = -ESTALE));
79 CDEBUG(D_INODE, "ino %ld\n", dir->i_ino);
81 dchild = lookup_one_len(rec->ur_name, de, rec->ur_namelen - 1);
83 CERROR("child lookup error %ld\n", PTR_ERR(dchild));
85 GOTO(out_reint_create, (rc = -ESTALE));
88 if (dchild->d_inode) {
89 CERROR("child exists (dir %ld, name %s)\n",
90 dir->i_ino, rec->ur_name);
92 GOTO(out_reint_create, (rc = -EEXIST));
95 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_CREATE_WRITE, dir->i_sb->s_dev);
99 handle = mds_fs_start(mds, dir, MDS_FSOP_CREATE);
101 GOTO(out_reint_create, PTR_ERR(handle));
102 rc = vfs_create(dir, dchild, rec->ur_mode);
107 handle = mds_fs_start(mds, dir, MDS_FSOP_MKDIR);
109 GOTO(out_reint_create, PTR_ERR(handle));
110 rc = vfs_mkdir(dir, dchild, rec->ur_mode);
115 handle = mds_fs_start(mds, dir, MDS_FSOP_SYMLINK);
117 GOTO(out_reint_create, PTR_ERR(handle));
118 rc = vfs_symlink(dir, dchild, rec->ur_tgt);
126 int rdev = rec->ur_id;
127 handle = mds_fs_start(mds, dir, MDS_FSOP_MKNOD);
129 GOTO(out_reint_create, PTR_ERR(handle));
130 rc = vfs_mknod(dir, dchild, rec->ur_mode, rdev);
135 CERROR("bad file type %d for create of %s\n",type,rec->ur_name);
136 GOTO(out_reint_create, rc = -EINVAL);
140 CERROR("error during create: %d\n", rc);
142 GOTO(out_reint_commit, rc);
145 struct inode *inode = dchild->d_inode;
146 struct mds_body *body;
148 if (type == S_IFREG) {
149 rc = mds_fs_set_objid(mds, inode, handle, rec->ur_id);
151 CERROR("error setting objid for %ld\n",
155 iattr.ia_atime = rec->ur_time;
156 iattr.ia_ctime = rec->ur_time;
157 iattr.ia_mtime = rec->ur_time;
158 iattr.ia_uid = rec->ur_uid;
159 iattr.ia_gid = rec->ur_gid;
160 iattr.ia_valid = ATTR_UID | ATTR_GID | ATTR_ATIME |
161 ATTR_MTIME | ATTR_CTIME;
163 rc = mds_fs_setattr(mds, dchild, handle, &iattr);
165 body = lustre_msg_buf(req->rq_repmsg, 0);
166 body->ino = inode->i_ino;
167 body->generation = inode->i_generation;
171 rc = mds_fs_commit(mds, dir, handle);
180 static int mds_reint_unlink(struct mds_update_record *rec,
181 struct ptlrpc_request *req)
183 struct dentry *de = NULL;
184 struct dentry *dchild = NULL;
185 struct mds_obd *mds = &req->rq_obd->u.mds;
190 de = mds_fid2dentry(mds, rec->ur_fid1, NULL);
191 if (IS_ERR(de) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNLINK)) {
193 GOTO(out_unlink, (rc = -ESTALE));
196 CDEBUG(D_INODE, "ino %ld\n", dir->i_ino);
198 dchild = lookup_one_len(rec->ur_name, de, rec->ur_namelen - 1);
199 if (IS_ERR(dchild)) {
200 CERROR("child lookup error %ld\n", PTR_ERR(dchild));
202 GOTO(out_unlink, (rc = -ESTALE));
205 if (!dchild->d_inode) {
206 CERROR("child doesn't exist (dir %ld, name %s\n",
207 dir->i_ino, rec->ur_name);
209 GOTO(out_unlink, (rc = -ESTALE));
212 if (dchild->d_inode->i_ino != rec->ur_fid2->id)
214 if (dchild->d_inode->i_generation != rec->ur_fid2->generation)
217 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_UNLINK_WRITE, dir->i_sb->s_dev);
219 switch (dchild->d_inode->i_mode & S_IFMT) {
221 rc = vfs_rmdir(dir, dchild);
225 rc = vfs_unlink(dir, dchild);
237 static int mds_reint_link(struct mds_update_record *rec,
238 struct ptlrpc_request *req)
240 struct dentry *de_src = NULL;
241 struct dentry *de_tgt_dir = NULL;
242 struct dentry *dchild = NULL;
246 de_src = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid1, NULL);
247 if (IS_ERR(de_src) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_LINK)) {
248 GOTO(out_link, (rc = -ESTALE));
251 de_tgt_dir = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid2, NULL);
252 if (IS_ERR(de_tgt_dir)) {
253 GOTO(out_link, (rc = -ESTALE));
256 dchild = lookup_one_len(rec->ur_name, de_tgt_dir, rec->ur_namelen - 1);
257 if (IS_ERR(dchild)) {
258 CERROR("child lookup error %ld\n", PTR_ERR(dchild));
259 GOTO(out_link, (rc = -ESTALE));
262 if (dchild->d_inode) {
263 CERROR("child exists (dir %ld, name %s\n",
264 de_tgt_dir->d_inode->i_ino, rec->ur_name);
265 GOTO(out_link, (rc = -EEXIST));
268 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE,
269 dchild->d_inode->i_sb->s_dev);
271 rc = vfs_link(de_src, de_tgt_dir->d_inode, dchild);
282 static int mds_reint_rename(struct mds_update_record *rec,
283 struct ptlrpc_request *req)
285 struct dentry *de_srcdir = NULL;
286 struct dentry *de_tgtdir = NULL;
287 struct dentry *de_old = NULL;
288 struct dentry *de_new = NULL;
292 de_srcdir = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid1, NULL);
293 if (IS_ERR(de_srcdir)) {
294 GOTO(out_rename, (rc = -ESTALE));
297 de_tgtdir = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid2, NULL);
298 if (IS_ERR(de_tgtdir)) {
299 GOTO(out_rename, (rc = -ESTALE));
302 de_old = lookup_one_len(rec->ur_name, de_srcdir, rec->ur_namelen - 1);
303 if (IS_ERR(de_old)) {
304 CERROR("child lookup error %ld\n", PTR_ERR(de_old));
305 GOTO(out_rename, (rc = -ESTALE));
308 de_new = lookup_one_len(rec->ur_tgt, de_tgtdir, rec->ur_tgtlen - 1);
309 if (IS_ERR(de_new)) {
310 CERROR("child lookup error %ld\n", PTR_ERR(de_new));
311 GOTO(out_rename, (rc = -ESTALE));
314 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_RENAME_WRITE,
315 de_srcdir->d_inode->i_sb->s_dev);
317 rc = vfs_rename(de_srcdir->d_inode, de_old, de_tgtdir->d_inode, de_new);
329 typedef int (*mds_reinter)(struct mds_update_record *, struct ptlrpc_request*);
331 static mds_reinter reinters[REINT_MAX+1] = {
332 [REINT_SETATTR] mds_reint_setattr,
333 [REINT_CREATE] mds_reint_create,
334 [REINT_UNLINK] mds_reint_unlink,
335 [REINT_LINK] mds_reint_link,
336 [REINT_RENAME] mds_reint_rename,
339 int mds_reint_rec(struct mds_update_record *rec, struct ptlrpc_request *req)
341 int rc, size = sizeof(struct mds_body);
343 if (rec->ur_opcode < 1 || rec->ur_opcode > REINT_MAX) {
344 CERROR("opcode %d not valid\n", rec->ur_opcode);
345 rc = req->rq_status = -EINVAL;
349 rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
351 CERROR("mds: out of memory\n");
352 rc = req->rq_status = -ENOMEM;
356 rc = reinters[rec->ur_opcode](rec, req);