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_de, (rc = -ESTALE));
79 CDEBUG(D_INODE, "ino %ld\n", dir->i_ino);
82 dchild = lookup_one_len(rec->ur_name, de, rec->ur_namelen - 1);
84 CERROR("child lookup error %ld\n", PTR_ERR(dchild));
87 GOTO(out_reint_dchild, (rc = -ESTALE));
90 if (dchild->d_inode) {
91 CERROR("child exists (dir %ld, name %s)\n",
92 dir->i_ino, rec->ur_name);
94 GOTO(out_reint_dchild, (rc = -EEXIST));
97 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_CREATE_WRITE, dir->i_sb->s_dev);
101 handle = mds_fs_start(mds, dir, MDS_FSOP_CREATE);
103 GOTO(out_reint_dchild, PTR_ERR(handle));
104 rc = vfs_create(dir, dchild, rec->ur_mode);
109 handle = mds_fs_start(mds, dir, MDS_FSOP_MKDIR);
111 GOTO(out_reint_dchild, PTR_ERR(handle));
112 rc = vfs_mkdir(dir, dchild, rec->ur_mode);
117 handle = mds_fs_start(mds, dir, MDS_FSOP_SYMLINK);
119 GOTO(out_reint_dchild, PTR_ERR(handle));
120 rc = vfs_symlink(dir, dchild, rec->ur_tgt);
128 int rdev = rec->ur_id;
129 handle = mds_fs_start(mds, dir, MDS_FSOP_MKNOD);
131 GOTO(out_reint_dchild, PTR_ERR(handle));
132 rc = vfs_mknod(dir, dchild, rec->ur_mode, rdev);
137 CERROR("bad file type %d for create of %s\n",type,rec->ur_name);
138 GOTO(out_reint_dchild, rc = -EINVAL);
142 CERROR("error during create: %d\n", rc);
144 GOTO(out_reint_commit, rc);
147 struct inode *inode = dchild->d_inode;
148 struct mds_body *body;
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 body = lustre_msg_buf(req->rq_repmsg, 0);
168 body->ino = inode->i_ino;
169 body->generation = inode->i_generation;
173 rc = mds_fs_commit(mds, dir, handle);
183 static int mds_reint_unlink(struct mds_update_record *rec,
184 struct ptlrpc_request *req)
186 struct dentry *de = NULL;
187 struct dentry *dchild = NULL;
188 struct mds_obd *mds = &req->rq_obd->u.mds;
193 de = mds_fid2dentry(mds, rec->ur_fid1, NULL);
194 if (IS_ERR(de) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNLINK)) {
196 GOTO(out_unlink, (rc = -ESTALE));
199 CDEBUG(D_INODE, "ino %ld\n", dir->i_ino);
202 dchild = lookup_one_len(rec->ur_name, de, rec->ur_namelen - 1);
203 if (IS_ERR(dchild)) {
204 CERROR("child lookup error %ld\n", PTR_ERR(dchild));
206 GOTO(out_unlink_de, (rc = -ESTALE));
209 if (!dchild->d_inode) {
210 CERROR("child doesn't exist (dir %ld, name %s\n",
211 dir->i_ino, rec->ur_name);
213 GOTO(out_unlink_dchild, (rc = -ESTALE));
216 if (dchild->d_inode->i_ino != rec->ur_fid2->id)
218 if (dchild->d_inode->i_generation != rec->ur_fid2->generation)
221 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_UNLINK_WRITE, dir->i_sb->s_dev);
223 switch (dchild->d_inode->i_mode & S_IFMT) {
225 rc = vfs_rmdir(dir, dchild);
229 rc = vfs_unlink(dir, dchild);
245 static int mds_reint_link(struct mds_update_record *rec,
246 struct ptlrpc_request *req)
248 struct dentry *de_src = NULL;
249 struct dentry *de_tgt_dir = NULL;
250 struct dentry *dchild = NULL;
254 de_src = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid1, NULL);
255 if (IS_ERR(de_src) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_LINK)) {
256 GOTO(out_link, (rc = -ESTALE));
259 de_tgt_dir = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid2, NULL);
260 if (IS_ERR(de_tgt_dir)) {
261 GOTO(out_link_de_src, (rc = -ESTALE));
264 down(&de_tgt_dir->d_inode->i_sem);
265 dchild = lookup_one_len(rec->ur_name, de_tgt_dir, rec->ur_namelen - 1);
266 if (IS_ERR(dchild)) {
267 CERROR("child lookup error %ld\n", PTR_ERR(dchild));
268 GOTO(out_link_de_tgt_dir, (rc = -ESTALE));
271 if (dchild->d_inode) {
272 CERROR("child exists (dir %ld, name %s\n",
273 de_tgt_dir->d_inode->i_ino, rec->ur_name);
274 GOTO(out_link_dchild, (rc = -EEXIST));
277 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE,
278 dchild->d_inode->i_sb->s_dev);
280 rc = vfs_link(de_src, de_tgt_dir->d_inode, dchild);
286 up(&de_tgt_dir->d_inode->i_sem);
295 static int mds_reint_rename(struct mds_update_record *rec,
296 struct ptlrpc_request *req)
298 struct dentry *de_srcdir = NULL;
299 struct dentry *de_tgtdir = NULL;
300 struct dentry *de_old = NULL;
301 struct dentry *de_new = NULL;
305 de_srcdir = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid1, NULL);
306 if (IS_ERR(de_srcdir)) {
307 GOTO(out_rename, (rc = -ESTALE));
310 de_tgtdir = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid2, NULL);
311 if (IS_ERR(de_tgtdir)) {
312 GOTO(out_rename, (rc = -ESTALE));
315 de_old = lookup_one_len(rec->ur_name, de_srcdir, rec->ur_namelen - 1);
316 if (IS_ERR(de_old)) {
317 CERROR("child lookup error %ld\n", PTR_ERR(de_old));
318 GOTO(out_rename, (rc = -ESTALE));
321 de_new = lookup_one_len(rec->ur_tgt, de_tgtdir, rec->ur_tgtlen - 1);
322 if (IS_ERR(de_new)) {
323 CERROR("child lookup error %ld\n", PTR_ERR(de_new));
324 GOTO(out_rename, (rc = -ESTALE));
327 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_RENAME_WRITE,
328 de_srcdir->d_inode->i_sb->s_dev);
330 rc = vfs_rename(de_srcdir->d_inode, de_old, de_tgtdir->d_inode, de_new);
342 typedef int (*mds_reinter)(struct mds_update_record *, struct ptlrpc_request*);
344 static mds_reinter reinters[REINT_MAX+1] = {
345 [REINT_SETATTR] mds_reint_setattr,
346 [REINT_CREATE] mds_reint_create,
347 [REINT_UNLINK] mds_reint_unlink,
348 [REINT_LINK] mds_reint_link,
349 [REINT_RENAME] mds_reint_rename,
352 int mds_reint_rec(struct mds_update_record *rec, struct ptlrpc_request *req)
354 int rc, size = sizeof(struct mds_body);
356 if (rec->ur_opcode < 1 || rec->ur_opcode > REINT_MAX) {
357 CERROR("opcode %d not valid\n", rec->ur_opcode);
358 rc = req->rq_status = -EINVAL;
362 rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
364 CERROR("mds: out of memory\n");
365 rc = req->rq_status = -ENOMEM;
369 rc = reinters[rec->ur_opcode](rec, req);