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;
46 de = mds_fid2dentry(mds, rec->ur_fid1, NULL);
47 if (IS_ERR(de) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_SETATTR)) {
48 GOTO(out_setattr, rc = -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 rc = mds_fs_setattr(mds, de, NULL, &rec->ur_iattr);
66 static int mds_reint_create(struct mds_update_record *rec,
67 struct ptlrpc_request *req)
69 struct dentry *de = NULL;
70 struct mds_obd *mds = &req->rq_obd->u.mds;
71 struct dentry *dchild = NULL;
74 int rc = 0, type = rec->ur_mode & S_IFMT;
77 de = mds_fid2dentry(mds, rec->ur_fid1, NULL);
78 if (IS_ERR(de) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_CREATE)) {
80 GOTO(out_create_de, rc = -ESTALE);
83 CDEBUG(D_INODE, "ino %ld\n", dir->i_ino);
86 dchild = lookup_one_len(rec->ur_name, de, rec->ur_namelen - 1);
88 CERROR("child lookup error %ld\n", PTR_ERR(dchild));
91 GOTO(out_create_dchild, rc = -ESTALE);
94 if (dchild->d_inode) {
95 CERROR("child exists (dir %ld, name %s)\n",
96 dir->i_ino, rec->ur_name);
98 GOTO(out_create_dchild, rc = -EEXIST);
101 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_CREATE_WRITE, dir->i_sb->s_dev);
105 handle = mds_fs_start(mds, dir, MDS_FSOP_CREATE);
107 GOTO(out_create_dchild, PTR_ERR(handle));
108 rc = vfs_create(dir, dchild, rec->ur_mode);
113 handle = mds_fs_start(mds, dir, MDS_FSOP_MKDIR);
115 GOTO(out_create_dchild, PTR_ERR(handle));
116 rc = vfs_mkdir(dir, dchild, rec->ur_mode);
121 handle = mds_fs_start(mds, dir, MDS_FSOP_SYMLINK);
123 GOTO(out_create_dchild, PTR_ERR(handle));
124 rc = vfs_symlink(dir, dchild, rec->ur_tgt);
132 int rdev = rec->ur_id;
133 handle = mds_fs_start(mds, dir, MDS_FSOP_MKNOD);
135 GOTO(out_create_dchild, PTR_ERR(handle));
136 rc = vfs_mknod(dir, dchild, rec->ur_mode, rdev);
141 CERROR("bad file type %d for create of %s\n",type,rec->ur_name);
142 GOTO(out_create_dchild, rc = -EINVAL);
146 CERROR("error during create: %d\n", rc);
148 GOTO(out_create_commit, rc);
151 struct inode *inode = dchild->d_inode;
152 struct mds_body *body;
154 if (type == S_IFREG) {
155 rc = mds_fs_set_objid(mds, inode, handle, rec->ur_id);
157 CERROR("error %d setting objid for %ld\n",
161 iattr.ia_atime = rec->ur_time;
162 iattr.ia_ctime = rec->ur_time;
163 iattr.ia_mtime = rec->ur_time;
164 iattr.ia_uid = rec->ur_uid;
165 iattr.ia_gid = rec->ur_gid;
166 iattr.ia_valid = ATTR_UID | ATTR_GID | ATTR_ATIME |
167 ATTR_MTIME | ATTR_CTIME;
169 rc = mds_fs_setattr(mds, dchild, handle, &iattr);
170 /* XXX should we abort here in case of error? */
172 body = lustre_msg_buf(req->rq_repmsg, 0);
173 body->ino = inode->i_ino;
174 body->generation = inode->i_generation;
178 /* FIXME: keep rc intact */
179 rc = mds_fs_commit(mds, dir, handle);
189 static int mds_reint_unlink(struct mds_update_record *rec,
190 struct ptlrpc_request *req)
192 struct dentry *de = NULL;
193 struct dentry *dchild = NULL;
194 struct mds_obd *mds = &req->rq_obd->u.mds;
195 struct inode *dir, *inode;
199 de = mds_fid2dentry(mds, rec->ur_fid1, NULL);
200 if (IS_ERR(de) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNLINK)) {
202 GOTO(out_unlink, rc = -ESTALE);
205 CDEBUG(D_INODE, "ino %ld\n", dir->i_ino);
208 dchild = lookup_one_len(rec->ur_name, de, rec->ur_namelen - 1);
209 if (IS_ERR(dchild)) {
210 CERROR("child lookup error %ld\n", PTR_ERR(dchild));
212 GOTO(out_unlink_de, rc = -ESTALE);
215 inode = dchild->d_inode;
217 CERROR("child doesn't exist (dir %ld, name %s\n",
218 dir->i_ino, rec->ur_name);
220 GOTO(out_unlink_dchild, rc = -ESTALE);
223 if (inode->i_ino != rec->ur_fid2->id) {
224 CERROR("inode and FID ID do not match (%ld != %Ld)\n",
225 inode->i_ino, rec->ur_fid2->id);
227 GOTO(out_unlink_dchild, rc = -ESTALE);
229 if (inode->i_generation != rec->ur_fid2->generation) {
230 CERROR("inode and FID GENERATION do not match (%d != %d)\n",
231 inode->i_generation, rec->ur_fid2->generation);
233 GOTO(out_unlink_dchild, rc = -ESTALE);
236 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_UNLINK_WRITE, dir->i_sb->s_dev);
238 switch (dchild->d_inode->i_mode & S_IFMT) {
240 rc = vfs_rmdir(dir, dchild);
244 rc = vfs_unlink(dir, dchild);
260 static int mds_reint_link(struct mds_update_record *rec,
261 struct ptlrpc_request *req)
263 struct dentry *de_src = NULL;
264 struct dentry *de_tgt_dir = NULL;
265 struct dentry *dchild = NULL;
266 struct mds_obd *mds = &req->rq_obd->u.mds;
270 de_src = mds_fid2dentry(mds, rec->ur_fid1, NULL);
271 if (IS_ERR(de_src) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_LINK)) {
272 GOTO(out_link, rc = -ESTALE);
275 de_tgt_dir = mds_fid2dentry(mds, rec->ur_fid2, NULL);
276 if (IS_ERR(de_tgt_dir)) {
277 GOTO(out_link_de_src, rc = -ESTALE);
280 down(&de_tgt_dir->d_inode->i_sem);
281 dchild = lookup_one_len(rec->ur_name, de_tgt_dir, rec->ur_namelen - 1);
282 if (IS_ERR(dchild)) {
283 CERROR("child lookup error %ld\n", PTR_ERR(dchild));
284 GOTO(out_link_de_tgt_dir, rc = -ESTALE);
287 if (dchild->d_inode) {
288 CERROR("child exists (dir %ld, name %s\n",
289 de_tgt_dir->d_inode->i_ino, rec->ur_name);
290 GOTO(out_link_dchild, rc = -EEXIST);
293 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE,
294 dchild->d_inode->i_sb->s_dev);
296 rc = vfs_link(de_src, de_tgt_dir->d_inode, dchild);
302 up(&de_tgt_dir->d_inode->i_sem);
311 static int mds_reint_rename(struct mds_update_record *rec,
312 struct ptlrpc_request *req)
314 struct dentry *de_srcdir = NULL;
315 struct dentry *de_tgtdir = NULL;
316 struct dentry *de_old = NULL;
317 struct dentry *de_new = NULL;
318 struct mds_obd *mds = &req->rq_obd->u.mds;
322 de_srcdir = mds_fid2dentry(mds, rec->ur_fid1, NULL);
323 if (IS_ERR(de_srcdir)) {
324 GOTO(out_rename, rc = -ESTALE);
327 de_tgtdir = mds_fid2dentry(mds, rec->ur_fid2, NULL);
328 if (IS_ERR(de_tgtdir)) {
329 GOTO(out_rename_srcdir, rc = -ESTALE);
332 de_old = lookup_one_len(rec->ur_name, de_srcdir, rec->ur_namelen - 1);
333 if (IS_ERR(de_old)) {
334 CERROR("old child lookup error %ld\n", PTR_ERR(de_old));
335 GOTO(out_rename_tgtdir, rc = -ESTALE);
338 de_new = lookup_one_len(rec->ur_tgt, de_tgtdir, rec->ur_tgtlen - 1);
339 if (IS_ERR(de_new)) {
340 CERROR("new child lookup error %ld\n", PTR_ERR(de_new));
341 GOTO(out_rename_deold, rc = -ESTALE);
344 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_RENAME_WRITE,
345 de_srcdir->d_inode->i_sb->s_dev);
347 rc = vfs_rename(de_srcdir->d_inode, de_old, de_tgtdir->d_inode, de_new);
362 typedef int (*mds_reinter)(struct mds_update_record *, struct ptlrpc_request*);
364 static mds_reinter reinters[REINT_MAX+1] = {
365 [REINT_SETATTR] mds_reint_setattr,
366 [REINT_CREATE] mds_reint_create,
367 [REINT_UNLINK] mds_reint_unlink,
368 [REINT_LINK] mds_reint_link,
369 [REINT_RENAME] mds_reint_rename,
372 int mds_reint_rec(struct mds_update_record *rec, struct ptlrpc_request *req)
374 int rc, size = sizeof(struct mds_body);
376 if (rec->ur_opcode < 1 || rec->ur_opcode > REINT_MAX) {
377 CERROR("opcode %d not valid\n", rec->ur_opcode);
378 rc = req->rq_status = -EINVAL;
382 rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
384 CERROR("mds: out of memory\n");
385 rc = req->rq_status = -ENOMEM;
389 rc = reinters[rec->ur_opcode](rec, req);