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)
43 struct mds_obd *mds = &req->rq_obd->u.mds;
46 de = mds_fid2dentry(mds, rec->ur_fid1, NULL);
47 if (IS_ERR(de) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_SETATTR)) {
48 req->rq_rephdr->status = -ESTALE;
52 CDEBUG(D_INODE, "ino %ld\n", de->d_inode->i_ino);
54 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_SETATTR_WRITE,
55 de->d_inode->i_sb->s_dev);
57 req->rq_rephdr->status = mds_fs_setattr(mds, de, NULL, &rec->ur_iattr);
63 static int mds_reint_create(struct mds_update_record *rec,
64 struct ptlrpc_request *req)
66 int type = rec->ur_mode & S_IFMT;
67 struct dentry *de = NULL;
68 struct mds_rep *rep = req->rq_rep.mds;
69 struct mds_obd *mds = &req->rq_obd->u.mds;
70 struct dentry *dchild = NULL;
76 de = mds_fid2dentry(mds, rec->ur_fid1, NULL);
77 if (IS_ERR(de) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_CREATE)) {
79 GOTO(out_reint_create, (rc = -ESTALE));
82 CDEBUG(D_INODE, "ino %ld\n", dir->i_ino);
84 dchild = lookup_one_len(rec->ur_name, de, rec->ur_namelen - 1);
86 CERROR("child lookup error %ld\n", PTR_ERR(dchild));
88 GOTO(out_reint_create, (rc = -ESTALE));
91 if (dchild->d_inode) {
92 CERROR("child exists (dir %ld, name %s)\n",
93 dir->i_ino, rec->ur_name);
95 GOTO(out_reint_create, (rc = -EEXIST));
98 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_CREATE_WRITE, dir->i_sb->s_dev);
102 handle = mds_fs_start(mds, dir, MDS_FSOP_CREATE);
104 GOTO(out_reint_create, PTR_ERR(handle));
105 rc = vfs_create(dir, dchild, rec->ur_mode);
110 handle = mds_fs_start(mds, dir, MDS_FSOP_MKDIR);
112 GOTO(out_reint_create, PTR_ERR(handle));
113 rc = vfs_mkdir(dir, dchild, rec->ur_mode);
118 handle = mds_fs_start(mds, dir, MDS_FSOP_SYMLINK);
120 GOTO(out_reint_create, PTR_ERR(handle));
121 rc = vfs_symlink(dir, dchild, rec->ur_tgt);
129 int rdev = rec->ur_id;
130 handle = mds_fs_start(mds, dir, MDS_FSOP_MKNOD);
132 GOTO(out_reint_create, PTR_ERR(handle));
133 rc = vfs_mknod(dir, dchild, rec->ur_mode, rdev);
138 CERROR("bad file type %d for create of %s\n",type,rec->ur_name);
139 GOTO(out_reint_create, rc = -EINVAL);
143 CERROR("error during create: %d\n", rc);
145 GOTO(out_reint_commit, rc);
148 struct inode *inode = dchild->d_inode;
150 if (type == S_IFREG) {
151 rc = mds_fs_set_objid(mds, inode, handle, rec->ur_id);
153 CERROR("error setting objid for %ld\n",
157 iattr.ia_atime = rec->ur_time;
158 iattr.ia_ctime = rec->ur_time;
159 iattr.ia_mtime = rec->ur_time;
160 iattr.ia_uid = rec->ur_uid;
161 iattr.ia_gid = rec->ur_gid;
162 iattr.ia_valid = ATTR_UID | ATTR_GID | ATTR_ATIME |
163 ATTR_MTIME | ATTR_CTIME;
165 rc = mds_fs_setattr(mds, dchild, handle, &iattr);
167 rep->ino = inode->i_ino;
168 rep->generation = inode->i_generation;
172 rc = mds_fs_commit(mds, dir, handle);
175 req->rq_rephdr->status = rc;
181 static int mds_reint_unlink(struct mds_update_record *rec,
182 struct ptlrpc_request *req)
184 struct dentry *de = NULL;
185 struct dentry *dchild = NULL;
186 struct mds_obd *mds = &req->rq_obd->u.mds;
191 de = mds_fid2dentry(mds, rec->ur_fid1, NULL);
192 if (IS_ERR(de) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNLINK)) {
194 GOTO(out_unlink, (rc = -ESTALE));
197 CDEBUG(D_INODE, "ino %ld\n", dir->i_ino);
199 dchild = lookup_one_len(rec->ur_name, de, rec->ur_namelen - 1);
200 if (IS_ERR(dchild)) {
201 CERROR("child lookup error %ld\n", PTR_ERR(dchild));
203 GOTO(out_unlink, (rc = -ESTALE));
206 if (!dchild->d_inode) {
207 CERROR("child doesn't exist (dir %ld, name %s\n",
208 dir->i_ino, rec->ur_name);
210 GOTO(out_unlink, (rc = -ESTALE));
213 if (dchild->d_inode->i_ino != rec->ur_fid2->id)
215 if (dchild->d_inode->i_generation != rec->ur_fid2->generation)
218 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_UNLINK_WRITE, dir->i_sb->s_dev);
220 switch (dchild->d_inode->i_mode & S_IFMT) {
222 rc = vfs_rmdir(dir, dchild);
226 rc = vfs_unlink(dir, dchild);
232 req->rq_rephdr->status = rc;
238 static int mds_reint_link(struct mds_update_record *rec,
239 struct ptlrpc_request *req)
241 struct dentry *de_src = NULL;
242 struct dentry *de_tgt_dir = NULL;
243 struct dentry *dchild = NULL;
247 de_src = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid1, NULL);
248 if (IS_ERR(de_src) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_LINK)) {
249 GOTO(out_link, (rc = -ESTALE));
252 de_tgt_dir = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid2, NULL);
253 if (IS_ERR(de_tgt_dir)) {
254 GOTO(out_link, (rc = -ESTALE));
257 dchild = lookup_one_len(rec->ur_name, de_tgt_dir, rec->ur_namelen - 1);
258 if (IS_ERR(dchild)) {
259 CERROR("child lookup error %ld\n", PTR_ERR(dchild));
260 GOTO(out_link, (rc = -ESTALE));
263 if (dchild->d_inode) {
264 CERROR("child exists (dir %ld, name %s\n",
265 de_tgt_dir->d_inode->i_ino, rec->ur_name);
266 GOTO(out_link, (rc = -EEXIST));
269 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE,
270 dchild->d_inode->i_sb->s_dev);
272 rc = vfs_link(de_src, de_tgt_dir->d_inode, dchild);
276 req->rq_rephdr->status = rc;
284 static int mds_reint_rename(struct mds_update_record *rec,
285 struct ptlrpc_request *req)
287 struct dentry *de_srcdir = NULL;
288 struct dentry *de_tgtdir = NULL;
289 struct dentry *de_old = NULL;
290 struct dentry *de_new = NULL;
294 de_srcdir = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid1, NULL);
295 if (IS_ERR(de_srcdir)) {
296 GOTO(out_rename, (rc = -ESTALE));
299 de_tgtdir = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid2, NULL);
300 if (IS_ERR(de_tgtdir)) {
301 GOTO(out_rename, (rc = -ESTALE));
304 de_old = lookup_one_len(rec->ur_name, de_srcdir, rec->ur_namelen - 1);
305 if (IS_ERR(de_old)) {
306 CERROR("child lookup error %ld\n", PTR_ERR(de_old));
307 GOTO(out_rename, (rc = -ESTALE));
310 de_new = lookup_one_len(rec->ur_tgt, de_tgtdir, rec->ur_tgtlen - 1);
311 if (IS_ERR(de_new)) {
312 CERROR("child lookup error %ld\n", PTR_ERR(de_new));
313 GOTO(out_rename, (rc = -ESTALE));
316 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_RENAME_WRITE,
317 de_srcdir->d_inode->i_sb->s_dev);
319 rc = vfs_rename(de_srcdir->d_inode, de_old, de_tgtdir->d_inode, de_new);
323 req->rq_rephdr->status = rc;
331 typedef int (*mds_reinter)(struct mds_update_record *, struct ptlrpc_request*);
333 static mds_reinter reinters[REINT_MAX+1] = {
334 [REINT_SETATTR] mds_reint_setattr,
335 [REINT_CREATE] mds_reint_create,
336 [REINT_UNLINK] mds_reint_unlink,
337 [REINT_LINK] mds_reint_link,
338 [REINT_RENAME] mds_reint_rename,
341 int mds_reint_rec(struct mds_update_record *rec, struct ptlrpc_request *req)
345 if (rec->ur_opcode < 0 || rec->ur_opcode > REINT_MAX) {
346 CERROR("opcode %d not valid\n", rec->ur_opcode);
347 rc = req->rq_status = -EINVAL;
351 rc = mds_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep,
352 &req->rq_replen, &req->rq_repbuf);
354 CERROR("mds: out of memory\n");
355 rc = req->rq_status = -ENOMEM;
358 req->rq_rephdr->xid = req->rq_reqhdr->xid;
360 rc = reinters[rec->ur_opcode](rec, req);