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Added nesting of journaled operations to last_rcvd file. Currently has a
[fs/lustre-release.git] / lustre / mds / mds_reint.c
index ba9e214..2695aba 100644 (file)
@@ -2,9 +2,9 @@
  * vim:expandtab:shiftwidth=8:tabstop=8:
  *
  *  linux/mds/mds_reint.c
- *  
+ *
  *  Lustre Metadata Server (mds) reintegration routines
- * 
+ *
  *  Copyright (C) 2002  Cluster File Systems, Inc.
  *  author: Peter Braam <braam@clusterfs.com>
  *
@@ -22,7 +22,6 @@
 #include <linux/fs.h>
 #include <linux/stat.h>
 #include <linux/locks.h>
-#include <linux/ext2_fs.h>
 #include <linux/quotaops.h>
 #include <asm/unistd.h>
 #include <asm/uaccess.h>
 #include <linux/lustre_mds.h>
 #include <linux/obd_class.h>
 
-extern struct ptlrpc_request *mds_prep_req(int size, int opcode, int namelen, char *name, int tgtlen, char *tgt);
+int mds_update_last_rcvd(struct mds_obd *mds, struct ptlrpc_request *req)
+{
+        return 0;
+}
 
-static int mds_reint_setattr(struct mds_update_record *rec, struct ptlrpc_request *req)
+static int mds_reint_setattr(struct mds_update_record *rec,
+                             struct ptlrpc_request *req)
 {
-        struct inode *inode;
-       struct dentry *de;
+        struct mds_obd *mds = &req->rq_obd->u.mds;
+        struct dentry *de;
+        void *handle;
+        int rc = 0;
 
-       de = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid1, NULL);
+        de = mds_fid2dentry(mds, rec->ur_fid1, NULL);
         if (IS_ERR(de) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_SETATTR)) {
-                req->rq_rephdr->status = -ESTALE;
-                RETURN(0);
-       }
-
-        inode = de->d_inode;
-        CDEBUG(D_INODE, "ino %ld\n", inode->i_ino);
-
-       /* a _really_ horrible hack to avoid removing the data stored
-          in the block pointers; this data is the object id 
-           this will go into an extended attribute at some point.
-       */
-       if ( rec->ur_iattr.ia_valid & ATTR_SIZE ) { 
-               /* ATTR_SIZE would invoke truncate: clear it */ 
-               rec->ur_iattr.ia_valid &= ~ATTR_SIZE;
-                inode->i_size = rec->ur_iattr.ia_size;
-
-                /* an _even_more_ horrible hack to make this hack work with
-                 * ext3.  This is because ext3 keeps a separate inode size
-                 * until the inode is committed to ensure consistency.  This
-                 * will also go away with the move to EAs.
-                 */
-                if (!strcmp(inode->i_sb->s_type->name, "ext3"))
-                        inode->u.ext3_i.i_disksize = inode->i_size;
-
-               /* make sure _something_ gets set - so new inode
-                  goes to disk (probably won't work over XFS */
-               if (!rec->ur_iattr.ia_valid & ATTR_MODE) {
-                       rec->ur_iattr.ia_valid |= ATTR_MODE;
-                       rec->ur_iattr.ia_mode = inode->i_mode;
-               }
-       }
-        OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_SETATTR_WRITE);
-        if ( inode->i_op->setattr ) {
-               req->rq_rephdr->status =
-                        inode->i_op->setattr(de, &rec->ur_iattr);
-       } else {
-               req->rq_rephdr->status =
-                        inode_setattr(inode, &rec->ur_iattr);
-       }
-
-       l_dput(de);
-       EXIT;
-       return 0;
-}
+                GOTO(out_setattr, rc = -ESTALE);
+        }
 
-/* 
-   XXX nasty hack: store the object id in the first two
-   direct block spots 
-*/
-static inline void mds_store_objid(struct inode *inode, __u64 *id)
-{
-        /* FIXME: it is only by luck that this works on ext3 */
-       memcpy(&inode->u.ext2_i.i_data, id, sizeof(*id));
-}
+        CDEBUG(D_INODE, "ino %ld\n", de->d_inode->i_ino);
 
+        OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_SETATTR_WRITE,
+                       de->d_inode->i_sb->s_dev);
 
-static int mds_reint_create(struct mds_update_record *rec, 
-                           struct ptlrpc_request *req)
+        handle = mds_fs_start(mds, de->d_inode, MDS_FSOP_SETATTR);
+        if (!handle)
+                GOTO(out_setattr_de, rc = PTR_ERR(handle));
+        rc = mds_fs_setattr(mds, de, handle, &rec->ur_iattr);
+
+        if (!rc)
+                rc = mds_update_last_rcvd(mds, req);
+
+        EXIT;
+
+        /* FIXME: keep rc intact */
+        rc = mds_fs_commit(mds, de->d_inode, handle);
+out_setattr_de:
+        l_dput(de);
+out_setattr:
+        req->rq_status = rc;
+        return(0);
+}
+
+static int mds_reint_create(struct mds_update_record *rec,
+                            struct ptlrpc_request *req)
 {
-       int type = rec->ur_mode & S_IFMT;
         struct dentry *de = NULL;
-       struct mds_rep *rep = req->rq_rep.mds;
+        struct mds_obd *mds = &req->rq_obd->u.mds;
         struct dentry *dchild = NULL;
-       int rc;
-       ENTRY;
+        struct inode *dir;
+        void *handle;
+        int rc = 0, type = rec->ur_mode & S_IFMT;
+        ENTRY;
 
-       de = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid1, NULL);
+        de = mds_fid2dentry(mds, rec->ur_fid1, NULL);
         if (IS_ERR(de) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_CREATE)) {
-                BUG();
-                GOTO(out_reint_create, (rc = -ESTALE));
-       }
-        CDEBUG(D_INODE, "ino %ld\n", de->d_inode->i_ino);
+                LBUG();
+                GOTO(out_create_de, rc = -ESTALE);
+        }
+        dir = de->d_inode;
+        CDEBUG(D_INODE, "ino %ld\n", dir->i_ino);
 
-       dchild = lookup_one_len(rec->ur_name, de, rec->ur_namelen - 1);
+        down(&dir->i_sem);
+        dchild = lookup_one_len(rec->ur_name, de, rec->ur_namelen - 1);
         if (IS_ERR(dchild)) {
                 CERROR("child lookup error %ld\n", PTR_ERR(dchild));
-                BUG();
-                GOTO(out_reint_create, (rc = -ESTALE));
-       }
-
-       if (dchild->d_inode) {
-               CERROR("child exists (dir %ld, name %s)\n", 
-                      de->d_inode->i_ino, rec->ur_name);
-                BUG();
-                GOTO(out_reint_create, (rc = -EEXIST));
-       }
-
-        OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_CREATE_WRITE);
-
-       switch (type) {
-       case S_IFREG: { 
-               rc = vfs_create(de->d_inode, dchild, rec->ur_mode);
-               EXIT;
-               break;
-       }
-       case S_IFDIR: { 
-               rc = vfs_mkdir(de->d_inode, dchild, rec->ur_mode);
-               EXIT;
-               break;
-       } 
-       case S_IFLNK: { 
-               rc = vfs_symlink(de->d_inode, dchild, rec->ur_tgt);
-               EXIT;
-               break;
-       } 
-       case S_IFCHR:
-       case S_IFBLK:
-       case S_IFIFO:
-       case S_IFSOCK: { 
-               int rdev = rec->ur_id;
-               rc = vfs_mknod(de->d_inode, dchild, rec->ur_mode, rdev); 
-               EXIT;
-               break;
-       }
-       }
-
-       if (!rc) { 
-               if (type == S_IFREG)
-                       mds_store_objid(dchild->d_inode, &rec->ur_id); 
-               dchild->d_inode->i_atime = rec->ur_time;
-               dchild->d_inode->i_ctime = rec->ur_time;
-               dchild->d_inode->i_mtime = rec->ur_time;
-               dchild->d_inode->i_uid = rec->ur_uid;
-               dchild->d_inode->i_gid = rec->ur_gid;
-               rep->ino = dchild->d_inode->i_ino;
-       }
-
-out_reint_create:
-        req->rq_rephdr->status = rc;
-        l_dput(de);
+                up(&dir->i_sem);
+                LBUG();
+                GOTO(out_create_dchild, rc = -ESTALE);
+        }
+
+        if (dchild->d_inode) {
+                CERROR("child exists (dir %ld, name %s)\n",
+                       dir->i_ino, rec->ur_name);
+                LBUG();
+                GOTO(out_create_dchild, rc = -EEXIST);
+        }
+
+        OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_CREATE_WRITE, dir->i_sb->s_dev);
+
+        switch (type) {
+        case S_IFREG: {
+                handle = mds_fs_start(mds, dir, MDS_FSOP_CREATE);
+                if (!handle)
+                        GOTO(out_create_dchild, PTR_ERR(handle));
+                rc = vfs_create(dir, dchild, rec->ur_mode);
+                EXIT;
+                break;
+        }
+        case S_IFDIR: {
+                handle = mds_fs_start(mds, dir, MDS_FSOP_MKDIR);
+                if (!handle)
+                        GOTO(out_create_dchild, PTR_ERR(handle));
+                rc = vfs_mkdir(dir, dchild, rec->ur_mode);
+                EXIT;
+                break;
+        }
+        case S_IFLNK: {
+                handle = mds_fs_start(mds, dir, MDS_FSOP_SYMLINK);
+                if (!handle)
+                        GOTO(out_create_dchild, PTR_ERR(handle));
+                rc = vfs_symlink(dir, dchild, rec->ur_tgt);
+                EXIT;
+                break;
+        }
+        case S_IFCHR:
+        case S_IFBLK:
+        case S_IFIFO:
+        case S_IFSOCK: {
+                int rdev = rec->ur_id;
+                handle = mds_fs_start(mds, dir, MDS_FSOP_MKNOD);
+                if (!handle)
+                        GOTO(out_create_dchild, PTR_ERR(handle));
+                rc = vfs_mknod(dir, dchild, rec->ur_mode, rdev);
+                EXIT;
+                break;
+        }
+        default:
+                CERROR("bad file type %d for create of %s\n",type,rec->ur_name);
+                GOTO(out_create_dchild, rc = -EINVAL);
+        }
+
+        if (rc) {
+                CERROR("error during create: %d\n", rc);
+                LBUG();
+                GOTO(out_create_commit, rc);
+        } else {
+                struct iattr iattr;
+                struct inode *inode = dchild->d_inode;
+                struct mds_body *body;
+
+                if (type == S_IFREG) {
+                        rc = mds_fs_set_objid(mds, inode, handle, rec->ur_id);
+                        if (rc)
+                                CERROR("error %d setting objid for %ld\n",
+                                       rc, inode->i_ino);
+                }
+
+                iattr.ia_atime = rec->ur_time;
+                iattr.ia_ctime = rec->ur_time;
+                iattr.ia_mtime = rec->ur_time;
+                iattr.ia_uid = rec->ur_uid;
+                iattr.ia_gid = rec->ur_gid;
+                iattr.ia_valid = ATTR_UID | ATTR_GID | ATTR_ATIME |
+                        ATTR_MTIME | ATTR_CTIME;
+
+                rc = mds_fs_setattr(mds, dchild, handle, &iattr);
+                /* XXX should we abort here in case of error? */
+
+                body = lustre_msg_buf(req->rq_repmsg, 0);
+                body->ino = inode->i_ino;
+                body->generation = inode->i_generation;
+        }
+
+        if (!rc)
+                rc = mds_update_last_rcvd(mds, req);
+
+out_create_commit:
+        /* FIXME: keep rc intact */
+        rc = mds_fs_commit(mds, dir, handle);
+out_create_dchild:
         l_dput(dchild);
-        RETURN(0);
+        up(&dir->i_sem);
+out_create_de:
+        l_dput(de);
+        req->rq_status = rc;
+        return 0;
 }
 
-static int mds_reint_unlink(struct mds_update_record *rec, 
-                           struct ptlrpc_request *req)
+static int mds_reint_unlink(struct mds_update_record *rec,
+                            struct ptlrpc_request *req)
 {
         struct dentry *de = NULL;
         struct dentry *dchild = NULL;
+        struct mds_obd *mds = &req->rq_obd->u.mds;
+        struct inode *dir, *inode;
+        void *handle;
         int rc = 0;
-       ENTRY;
+        ENTRY;
 
-       de = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid1, NULL);
+        de = mds_fid2dentry(mds, rec->ur_fid1, NULL);
         if (IS_ERR(de) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNLINK)) {
-                BUG();
-                GOTO(out_unlink, (rc = -ESTALE));
-       }
-        CDEBUG(D_INODE, "ino %ld\n", de->d_inode->i_ino);
+                LBUG();
+                GOTO(out_unlink, rc = -ESTALE);
+        }
+        dir = de->d_inode;
+        CDEBUG(D_INODE, "ino %ld\n", dir->i_ino);
 
-       dchild = lookup_one_len(rec->ur_name, de, rec->ur_namelen - 1);
+        down(&dir->i_sem);
+        dchild = lookup_one_len(rec->ur_name, de, rec->ur_namelen - 1);
         if (IS_ERR(dchild)) {
                 CERROR("child lookup error %ld\n", PTR_ERR(dchild));
-                BUG();
-                GOTO(out_unlink, (rc = -ESTALE));
-       }
-
-       if (!dchild->d_inode) {
-               CERROR("child doesn't exist (dir %ld, name %s\n", 
-                      de->d_inode->i_ino, rec->ur_name);
-                BUG();
-                GOTO(out_unlink, (rc = -ESTALE));
-       }
-
-        OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_UNLINK_WRITE);
-
-       switch (dchild->d_inode->i_mode & S_IFMT) {
-       case S_IFDIR:
-               rc = vfs_rmdir(de->d_inode, dchild);
-               EXIT;
-               break;
-       default:
-                rc = vfs_unlink(de->d_inode, dchild);
-               EXIT;
-               break;
-       }
+                LBUG();
+                GOTO(out_unlink_de, rc = -ESTALE);
+        }
 
-out_unlink:
-        req->rq_rephdr->status = rc;
-        l_dput(de);
+        inode = dchild->d_inode;
+        if (!inode) {
+                CERROR("child doesn't exist (dir %ld, name %s\n",
+                       dir->i_ino, rec->ur_name);
+                LBUG();
+                GOTO(out_unlink_dchild, rc = -ESTALE);
+        }
+
+        if (inode->i_ino != rec->ur_fid2->id) {
+                CERROR("inode and FID ID do not match (%ld != %Ld)\n",
+                       inode->i_ino, rec->ur_fid2->id);
+                LBUG();
+                GOTO(out_unlink_dchild, rc = -ESTALE);
+        }
+        if (inode->i_generation != rec->ur_fid2->generation) {
+                CERROR("inode and FID GENERATION do not match (%d != %d)\n",
+                       inode->i_generation, rec->ur_fid2->generation);
+                LBUG();
+                GOTO(out_unlink_dchild, rc = -ESTALE);
+        }
+
+        OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_UNLINK_WRITE, dir->i_sb->s_dev);
+
+        switch (dchild->d_inode->i_mode & S_IFMT) {
+        case S_IFDIR:
+                handle = mds_fs_start(mds, dir, MDS_FSOP_RMDIR);
+                if (!handle)
+                        GOTO(out_unlink_dchild, rc = PTR_ERR(handle));
+                rc = vfs_rmdir(dir, dchild);
+                break;
+        default:
+                handle = mds_fs_start(mds, dir, MDS_FSOP_UNLINK);
+                if (!handle)
+                        GOTO(out_unlink_dchild, rc = PTR_ERR(handle));
+                rc = vfs_unlink(dir, dchild);
+                break;
+        }
+
+        if (!rc)
+                rc = mds_update_last_rcvd(mds, req);
+        /* FIXME: keep rc intact */
+        rc = mds_fs_commit(mds, dir, handle);
+
+        EXIT;
+out_unlink_dchild:
         l_dput(dchild);
-        RETURN(0);
+out_unlink_de:
+        up(&dir->i_sem);
+        l_dput(de);
+out_unlink:
+        req->rq_status = rc;
+        return 0;
 }
 
-static int mds_reint_link(struct mds_update_record *rec, 
-                           struct ptlrpc_request *req)
+static int mds_reint_link(struct mds_update_record *rec,
+                            struct ptlrpc_request *req)
 {
         struct dentry *de_src = NULL;
         struct dentry *de_tgt_dir = NULL;
         struct dentry *dchild = NULL;
+        struct mds_obd *mds = &req->rq_obd->u.mds;
+        void *handle;
         int rc = 0;
 
         ENTRY;
-        de_src = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid1, NULL);
+        de_src = mds_fid2dentry(mds, rec->ur_fid1, NULL);
         if (IS_ERR(de_src) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_LINK)) {
-                GOTO(out_link, (rc = -ESTALE));
+                GOTO(out_link, rc = -ESTALE);
         }
 
-       de_tgt_dir = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid2, NULL);
+        de_tgt_dir = mds_fid2dentry(mds, rec->ur_fid2, NULL);
         if (IS_ERR(de_tgt_dir)) {
-                GOTO(out_link, (rc = -ESTALE));
-       }
+                GOTO(out_link_de_src, rc = -ESTALE);
+        }
 
-       dchild = lookup_one_len(rec->ur_name, de_tgt_dir, rec->ur_namelen - 1);
-       if (IS_ERR(dchild)) {
+        down(&de_tgt_dir->d_inode->i_sem);
+        dchild = lookup_one_len(rec->ur_name, de_tgt_dir, rec->ur_namelen - 1);
+        if (IS_ERR(dchild)) {
                 CERROR("child lookup error %ld\n", PTR_ERR(dchild));
-               GOTO(out_link, (rc = -ESTALE));
-       }
+                GOTO(out_link_de_tgt_dir, rc = -ESTALE);
+        }
 
-       if (dchild->d_inode) {
-               CERROR("child exists (dir %ld, name %s\n", 
-                      de_tgt_dir->d_inode->i_ino, rec->ur_name);
-               GOTO(out_link, (rc = -EEXIST));
-       }
+        if (dchild->d_inode) {
+                CERROR("child exists (dir %ld, name %s\n",
+                       de_tgt_dir->d_inode->i_ino, rec->ur_name);
+                GOTO(out_link_dchild, rc = -EEXIST);
+        }
+
+        OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE,
+                       dchild->d_inode->i_sb->s_dev);
+
+        handle = mds_fs_start(mds, de_tgt_dir->d_inode, MDS_FSOP_LINK);
+        if (!handle)
+                GOTO(out_link_dchild, rc = PTR_ERR(handle));
 
-        OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE);
+        rc = vfs_link(de_src, de_tgt_dir->d_inode, dchild);
 
-       rc = vfs_link(de_src, de_tgt_dir->d_inode, dchild); 
+        if (!rc)
+                rc = mds_update_last_rcvd(mds, req);
+
+        /* FIXME: keep rc intact */
+        rc = mds_fs_commit(mds, de_tgt_dir->d_inode, handle);
         EXIT;
 
- out_link:
-       req->rq_rephdr->status = rc;
-       l_dput(de_src);
-       l_dput(de_tgt_dir); 
-       l_dput(dchild); 
-       return 0;
+out_link_dchild:
+        l_dput(dchild);
+out_link_de_tgt_dir:
+        up(&de_tgt_dir->d_inode->i_sem);
+        l_dput(de_tgt_dir);
+out_link_de_src:
+        l_dput(de_src);
+out_link:
+        req->rq_status = rc;
+        return 0;
 }
 
-
-static int mds_reint_rename(struct mds_update_record *rec, 
-                           struct ptlrpc_request *req)
+static int mds_reint_rename(struct mds_update_record *rec,
+                            struct ptlrpc_request *req)
 {
-       struct dentry *de_srcdir = NULL;
-       struct dentry *de_tgtdir = NULL;
-       struct dentry *de_old = NULL; 
-       struct dentry *de_new = NULL; 
-       int rc = 0;
-       ENTRY;
-
-       de_srcdir = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid1, NULL);
+        struct dentry *de_srcdir = NULL;
+        struct dentry *de_tgtdir = NULL;
+        struct dentry *de_old = NULL;
+        struct dentry *de_new = NULL;
+        struct mds_obd *mds = &req->rq_obd->u.mds;
+        void *handle;
+        int rc = 0;
+        ENTRY;
+
+        de_srcdir = mds_fid2dentry(mds, rec->ur_fid1, NULL);
         if (IS_ERR(de_srcdir)) {
-                GOTO(out_rename, (rc = -ESTALE));
-       }
+                GOTO(out_rename, rc = -ESTALE);
+        }
 
-       de_tgtdir = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid2, NULL);
+        de_tgtdir = mds_fid2dentry(mds, rec->ur_fid2, NULL);
         if (IS_ERR(de_tgtdir)) {
-                GOTO(out_rename, (rc = -ESTALE));
-       }
+                GOTO(out_rename_srcdir, rc = -ESTALE);
+        }
 
-       de_old = lookup_one_len(rec->ur_name, de_srcdir, rec->ur_namelen - 1);
+        de_old = lookup_one_len(rec->ur_name, de_srcdir, rec->ur_namelen - 1);
         if (IS_ERR(de_old)) {
-                CERROR("child lookup error %ld\n", PTR_ERR(de_old));
-                GOTO(out_rename, (rc = -ESTALE));
-       }
+                CERROR("old child lookup error %ld\n", PTR_ERR(de_old));
+                GOTO(out_rename_tgtdir, rc = -ESTALE);
+        }
 
-       de_new = lookup_one_len(rec->ur_tgt, de_tgtdir, rec->ur_tgtlen - 1);
+        de_new = lookup_one_len(rec->ur_tgt, de_tgtdir, rec->ur_tgtlen - 1);
         if (IS_ERR(de_new)) {
-                CERROR("child lookup error %ld\n", PTR_ERR(de_new));
-                GOTO(out_rename, (rc = -ESTALE));
-       }
+                CERROR("new child lookup error %ld\n", PTR_ERR(de_new));
+                GOTO(out_rename_deold, rc = -ESTALE);
+        }
+
+        OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_RENAME_WRITE,
+                       de_srcdir->d_inode->i_sb->s_dev);
+
+        handle = mds_fs_start(mds, de_tgtdir->d_inode, MDS_FSOP_RENAME);
+        if (!handle)
+                GOTO(out_rename_denew, rc = PTR_ERR(handle));
+        rc = vfs_rename(de_srcdir->d_inode, de_old, de_tgtdir->d_inode, de_new);
 
-        OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_RENAME_WRITE);
+        if (!rc)
+                rc = mds_update_last_rcvd(mds, req);
 
-       rc = vfs_rename(de_srcdir->d_inode, de_old, de_tgtdir->d_inode, de_new);
+        /* FIXME: keep rc intact */
+        rc = mds_fs_commit(mds, de_tgtdir->d_inode, handle);
         EXIT;
 
- out_rename:
-       req->rq_rephdr->status = rc;
-       l_dput(de_new);
-       l_dput(de_old); 
-       l_dput(de_tgtdir); 
-       l_dput(de_srcdir); 
-       return 0;
+out_rename_denew:
+        l_dput(de_new);
+out_rename_deold:
+        l_dput(de_old);
+out_rename_tgtdir:
+        l_dput(de_tgtdir);
+out_rename_srcdir:
+        l_dput(de_srcdir);
+out_rename:
+        req->rq_status = rc;
+        return 0;
 }
 
-typedef int (*mds_reinter)(struct mds_update_record *, struct ptlrpc_request*); 
+typedef int (*mds_reinter)(struct mds_update_record *, struct ptlrpc_request*);
 
-static mds_reinter  reinters[REINT_MAX+1] = {
+static mds_reinter reinters[REINT_MAX+1] = {
         [REINT_SETATTR]   mds_reint_setattr,
         [REINT_CREATE]    mds_reint_create,
         [REINT_UNLINK]    mds_reint_unlink,
         [REINT_LINK]      mds_reint_link,
-        [REINT_RENAME]    mds_reint_rename
+        [REINT_RENAME]    mds_reint_rename,
 };
 
 int mds_reint_rec(struct mds_update_record *rec, struct ptlrpc_request *req)
 {
-       int rc; 
+        int rc, size = sizeof(struct mds_body);
 
-        if (rec->ur_opcode < 0 || rec->ur_opcode > REINT_MAX) {
+        if (rec->ur_opcode < 1 || rec->ur_opcode > REINT_MAX) {
                 CERROR("opcode %d not valid\n", rec->ur_opcode);
                 rc = req->rq_status = -EINVAL;
                 RETURN(rc);
-       }
+        }
 
-       rc = mds_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep, 
-                         &req->rq_replen, &req->rq_repbuf);
+        rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
         if (rc) {
                 CERROR("mds: out of memory\n");
                 rc = req->rq_status = -ENOMEM;
                 RETURN(rc);
-       }
-       req->rq_rephdr->xid = req->rq_reqhdr->xid;
-
-       rc = reinters[rec->ur_opcode](rec, req); 
-       return rc;
-} 
+        }
 
+        rc = reinters[rec->ur_opcode](rec, req);
+        return rc;
+}