+/* Update object linkEA */
+struct mdt_lock_list {
+ struct mdt_object *mll_obj;
+ struct mdt_lock_handle mll_lh;
+ struct list_head mll_list;
+};
+
+static void mdt_unlock_list(struct mdt_thread_info *info,
+ struct list_head *list, int rc)
+{
+ struct mdt_lock_list *mll;
+ struct mdt_lock_list *mll2;
+
+ list_for_each_entry_safe(mll, mll2, list, mll_list) {
+ mdt_object_unlock_put(info, mll->mll_obj, &mll->mll_lh, rc);
+ list_del(&mll->mll_list);
+ OBD_FREE_PTR(mll);
+ }
+}
+
+static int mdt_lock_objects_in_linkea(struct mdt_thread_info *info,
+ struct mdt_object *obj,
+ struct mdt_object *pobj,
+ struct list_head *lock_list)
+{
+ struct lu_buf *buf = &info->mti_big_buf;
+ struct linkea_data ldata = { NULL };
+ int count;
+ int rc;
+ ENTRY;
+
+ if (S_ISDIR(lu_object_attr(&obj->mot_obj)))
+ RETURN(0);
+
+ buf = lu_buf_check_and_alloc(buf, PATH_MAX);
+ if (buf->lb_buf == NULL)
+ RETURN(-ENOMEM);
+
+ ldata.ld_buf = buf;
+ rc = mdt_links_read(info, obj, &ldata);
+ if (rc != 0) {
+ if (rc == -ENOENT || rc == -ENODATA)
+ rc = 0;
+ RETURN(rc);
+ }
+
+ LASSERT(ldata.ld_leh != NULL);
+ ldata.ld_lee = (struct link_ea_entry *)(ldata.ld_leh + 1);
+ for (count = 0; count < ldata.ld_leh->leh_reccount; count++) {
+ struct mdt_device *mdt = info->mti_mdt;
+ struct mdt_object *mdt_pobj;
+ struct mdt_lock_list *mll;
+ struct lu_name name;
+ struct lu_fid fid;
+
+ linkea_entry_unpack(ldata.ld_lee, &ldata.ld_reclen,
+ &name, &fid);
+ ldata.ld_lee = (struct link_ea_entry *)((char *)ldata.ld_lee +
+ ldata.ld_reclen);
+ mdt_pobj = mdt_object_find(info->mti_env, mdt, &fid);
+ if (IS_ERR(mdt_pobj)) {
+ CWARN("%s: cannot find obj "DFID": rc = %ld\n",
+ mdt_obd_name(mdt), PFID(&fid), PTR_ERR(mdt_pobj));
+ continue;
+ }
+
+ if (!mdt_object_exists(mdt_pobj)) {
+ CDEBUG(D_INFO, "%s: obj "DFID" does not exist\n",
+ mdt_obd_name(mdt), PFID(&fid));
+ mdt_object_put(info->mti_env, mdt_pobj);
+ continue;
+ }
+
+ if (mdt_pobj == pobj) {
+ CDEBUG(D_INFO, "%s: skipping parent obj "DFID"\n",
+ mdt_obd_name(mdt), PFID(&fid));
+ mdt_object_put(info->mti_env, mdt_pobj);
+ continue;
+ }
+
+ OBD_ALLOC_PTR(mll);
+ if (mll == NULL) {
+ mdt_object_put(info->mti_env, mdt_pobj);
+ GOTO(out, rc = -ENOMEM);
+ }
+
+ mdt_lock_pdo_init(&mll->mll_lh, LCK_PW, &name);
+ rc = mdt_object_lock(info, mdt_pobj, &mll->mll_lh,
+ MDS_INODELOCK_UPDATE,
+ MDT_CROSS_LOCK);
+ if (rc != 0) {
+ CERROR("%s: cannot lock "DFID": rc =%d\n",
+ mdt_obd_name(mdt), PFID(&fid), rc);
+ mdt_object_put(info->mti_env, mdt_pobj);
+ OBD_FREE_PTR(mll);
+ GOTO(out, rc);
+ }
+
+ INIT_LIST_HEAD(&mll->mll_list);
+ mll->mll_obj = mdt_pobj;
+ list_add_tail(&mll->mll_list, lock_list);
+ }
+out:
+ if (rc != 0)
+ mdt_unlock_list(info, lock_list, rc);
+ RETURN(rc);
+}
+
+/* migrate files from one MDT to another MDT */
+static int mdt_reint_migrate_internal(struct mdt_thread_info *info,
+ struct mdt_lock_handle *lhc)
+{
+ struct mdt_reint_record *rr = &info->mti_rr;
+ struct md_attr *ma = &info->mti_attr;
+ struct mdt_object *msrcdir;
+ struct mdt_object *mold;
+ struct mdt_object *mnew = NULL;
+ struct mdt_lock_handle *lh_dirp;
+ struct mdt_lock_handle *lh_childp;
+ struct mdt_lock_handle *lh_tgtp = NULL;
+ struct lu_fid *old_fid = &info->mti_tmp_fid1;
+ struct list_head lock_list;
+ int rc;
+ ENTRY;
+
+ CDEBUG(D_INODE, "migrate "DFID"/"DNAME" to "DFID"\n", PFID(rr->rr_fid1),
+ PNAME(&rr->rr_name), PFID(rr->rr_fid2));
+
+ /* 1: lock the source dir. */
+ msrcdir = mdt_object_find(info->mti_env, info->mti_mdt, rr->rr_fid1);
+ if (IS_ERR(msrcdir)) {
+ CERROR("%s: cannot find source dir "DFID" : rc = %d\n",
+ mdt_obd_name(info->mti_mdt), PFID(rr->rr_fid1),
+ (int)PTR_ERR(msrcdir));
+ RETURN(PTR_ERR(msrcdir));
+ }
+
+ lh_dirp = &info->mti_lh[MDT_LH_PARENT];
+ mdt_lock_pdo_init(lh_dirp, LCK_PW, &rr->rr_name);
+ rc = mdt_object_lock(info, msrcdir, lh_dirp,
+ MDS_INODELOCK_UPDATE,
+ MDT_CROSS_LOCK);
+ if (rc)
+ GOTO(out_put_parent, rc);
+
+ if (!mdt_object_remote(msrcdir)) {
+ rc = mdt_version_get_check_save(info, msrcdir, 0);
+ if (rc)
+ GOTO(out_unlock_parent, rc);
+ }
+
+ /* 2: sanity check and find the object to be migrated. */
+ fid_zero(old_fid);
+ rc = mdt_lookup_version_check(info, msrcdir, &rr->rr_name, old_fid, 2);
+ if (rc != 0)
+ GOTO(out_unlock_parent, rc);
+
+ if (lu_fid_eq(old_fid, rr->rr_fid1) || lu_fid_eq(old_fid, rr->rr_fid2))
+ GOTO(out_unlock_parent, rc = -EINVAL);
+
+ if (!fid_is_md_operative(old_fid))
+ GOTO(out_unlock_parent, rc = -EPERM);
+
+ mold = mdt_object_find(info->mti_env, info->mti_mdt, old_fid);
+ if (IS_ERR(mold))
+ GOTO(out_unlock_parent, rc = PTR_ERR(mold));
+
+ if (mdt_object_remote(mold)) {
+ CERROR("%s: source "DFID" is on the remote MDT\n",
+ mdt_obd_name(info->mti_mdt), PFID(old_fid));
+ GOTO(out_put_child, rc = -EREMOTE);
+ }
+
+ if (S_ISREG(lu_object_attr(&mold->mot_obj)) &&
+ !mdt_object_remote(msrcdir)) {
+ CERROR("%s: parent "DFID" is still on the same"
+ " MDT, which should be migrated first:"
+ " rc = %d\n", mdt_obd_name(info->mti_mdt),
+ PFID(mdt_object_fid(msrcdir)), -EPERM);
+ GOTO(out_put_child, rc = -EPERM);
+ }
+
+ rc = mdt_remote_permission(info, msrcdir, mold);
+ if (rc != 0)
+ GOTO(out_put_child, rc);
+
+ /* 3: iterate the linkea of the object and lock all of the objects */
+ INIT_LIST_HEAD(&lock_list);
+ rc = mdt_lock_objects_in_linkea(info, mold, msrcdir, &lock_list);
+ if (rc != 0)
+ GOTO(out_put_child, rc);
+
+ /* 4: lock of the object migrated object */
+ lh_childp = &info->mti_lh[MDT_LH_OLD];
+ mdt_lock_reg_init(lh_childp, LCK_EX);
+ rc = mdt_object_lock(info, mold, lh_childp,
+ MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
+ MDS_INODELOCK_LAYOUT, MDT_CROSS_LOCK);
+ if (rc != 0)
+ GOTO(out_unlock_list, rc);
+
+ ma->ma_need = MA_LMV;
+ ma->ma_valid = 0;
+ ma->ma_lmv = (union lmv_mds_md *)info->mti_xattr_buf;
+ ma->ma_lmv_size = sizeof(info->mti_xattr_buf);
+ rc = mdt_stripe_get(info, mold, ma, XATTR_NAME_LMV);
+ if (rc != 0)
+ GOTO(out_unlock_list, rc);
+
+ if ((ma->ma_valid & MA_LMV)) {
+ struct lmv_mds_md_v1 *lmm1;
+
+ lmv_le_to_cpu(ma->ma_lmv, ma->ma_lmv);
+ lmm1 = &ma->ma_lmv->lmv_md_v1;
+ if (!(lmm1->lmv_hash_type & LMV_HASH_FLAG_MIGRATION)) {
+ CERROR("%s: can not migrate striped dir "DFID
+ ": rc = %d\n", mdt_obd_name(info->mti_mdt),
+ PFID(mdt_object_fid(mold)), -EPERM);
+ GOTO(out_unlock_child, rc = -EPERM);
+ }
+
+ if (!fid_is_sane(&lmm1->lmv_stripe_fids[1]))
+ GOTO(out_unlock_child, rc = -EINVAL);
+
+ mnew = mdt_object_find(info->mti_env, info->mti_mdt,
+ &lmm1->lmv_stripe_fids[1]);
+ if (IS_ERR(mnew))
+ GOTO(out_unlock_child, rc = PTR_ERR(mnew));
+
+ if (!mdt_object_remote(mnew)) {
+ CERROR("%s: "DFID" being migrated is on this MDT:"
+ " rc = %d\n", mdt_obd_name(info->mti_mdt),
+ PFID(rr->rr_fid2), -EPERM);
+ GOTO(out_put_new, rc = -EPERM);
+ }
+
+ lh_tgtp = &info->mti_lh[MDT_LH_CHILD];
+ mdt_lock_reg_init(lh_tgtp, LCK_EX);
+ rc = mdt_remote_object_lock(info, mnew,
+ mdt_object_fid(mnew),
+ &lh_tgtp->mlh_rreg_lh,
+ lh_tgtp->mlh_rreg_mode,
+ MDS_INODELOCK_UPDATE);
+ if (rc != 0) {
+ lh_tgtp = NULL;
+ GOTO(out_put_new, rc);
+ }
+ } else {
+ mnew = mdt_object_find(info->mti_env, info->mti_mdt,
+ rr->rr_fid2);
+ if (IS_ERR(mnew))
+ GOTO(out_unlock_child, rc = PTR_ERR(mnew));
+ if (!mdt_object_remote(mnew)) {
+ CERROR("%s: Migration "DFID" is on this MDT:"
+ " rc = %d\n", mdt_obd_name(info->mti_mdt),
+ PFID(rr->rr_fid2), -EXDEV);
+ GOTO(out_put_new, rc = -EXDEV);
+ }
+ }
+
+ /* 5: migrate it */
+ mdt_reint_init_ma(info, ma);
+
+ mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom,
+ OBD_FAIL_MDS_REINT_RENAME_WRITE);
+
+ rc = mdo_migrate(info->mti_env, mdt_object_child(msrcdir),
+ mdt_object_child(mold), &rr->rr_name,
+ mdt_object_child(mnew), ma);
+ if (rc != 0)
+ GOTO(out_unlock_new, rc);
+out_unlock_new:
+ if (lh_tgtp != NULL)
+ mdt_object_unlock(info, mnew, lh_tgtp, rc);
+out_put_new:
+ if (mnew)
+ mdt_object_put(info->mti_env, mnew);
+out_unlock_child:
+ mdt_object_unlock(info, mold, lh_childp, rc);
+out_unlock_list:
+ mdt_unlock_list(info, &lock_list, rc);
+out_put_child:
+ mdt_object_put(info->mti_env, mold);
+out_unlock_parent:
+ mdt_object_unlock(info, msrcdir, lh_dirp, rc);
+out_put_parent:
+ mdt_object_put(info->mti_env, msrcdir);
+
+ RETURN(rc);
+}
+
+static struct mdt_object *mdt_object_find_check(struct mdt_thread_info *info,
+ const struct lu_fid *fid,
+ int idx)
+{
+ struct mdt_object *dir;
+ int rc;
+ ENTRY;
+
+ dir = mdt_object_find(info->mti_env, info->mti_mdt, fid);
+ if (IS_ERR(dir))
+ RETURN(dir);
+
+ /* check early, the real version will be saved after locking */
+ rc = mdt_version_get_check(info, dir, idx);
+ if (rc)
+ GOTO(out_put, rc);
+
+ RETURN(dir);
+out_put:
+ mdt_object_put(info->mti_env, dir);
+ return ERR_PTR(rc);
+}
+
+static int mdt_object_lock_save(struct mdt_thread_info *info,
+ struct mdt_object *dir,
+ struct mdt_lock_handle *lh,
+ int idx)
+{
+ int rc;
+
+ /* we lock the target dir if it is local */
+ rc = mdt_object_lock(info, dir, lh, MDS_INODELOCK_UPDATE,
+ MDT_LOCAL_LOCK);
+ if (rc != 0)
+ return rc;
+
+ /* get and save correct version after locking */
+ mdt_version_get_save(info, dir, idx);
+ return 0;
+}
+
+
+static int mdt_rename_parents_lock(struct mdt_thread_info *info,
+ struct mdt_object **srcp,
+ struct mdt_object **tgtp)
+{
+ struct mdt_reint_record *rr = &info->mti_rr;
+ const struct lu_fid *fid_src = rr->rr_fid1;
+ const struct lu_fid *fid_tgt = rr->rr_fid2;
+ struct mdt_lock_handle *lh_src = &info->mti_lh[MDT_LH_PARENT];
+ struct mdt_lock_handle *lh_tgt = &info->mti_lh[MDT_LH_CHILD];
+ struct mdt_object *src;
+ struct mdt_object *tgt;
+ int reverse = 0;
+ int rc;
+ ENTRY;
+
+ /* find both parents. */
+ src = mdt_object_find_check(info, fid_src, 0);
+ if (IS_ERR(src))
+ RETURN(PTR_ERR(src));
+
+ OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME3, 5);
+
+ if (lu_fid_eq(fid_src, fid_tgt)) {
+ tgt = src;
+ mdt_object_get(info->mti_env, tgt);
+ } else {
+ /* Check if the @src is not a child of the @tgt, otherwise a
+ * reverse locking must take place. */
+ rc = mdt_is_subdir(info, src, fid_tgt);
+ if (rc == -EINVAL)
+ reverse = 1;
+ else if (rc)
+ GOTO(err_src_put, rc);
+
+ tgt = mdt_object_find_check(info, fid_tgt, 1);
+ if (IS_ERR(tgt))
+ GOTO(err_src_put, rc = PTR_ERR(tgt));
+
+ if (unlikely(mdt_object_remote(tgt))) {
+ CDEBUG(D_INFO, "Source dir "DFID" target dir "DFID
+ "on different MDTs\n", PFID(fid_src),
+ PFID(fid_tgt));
+ GOTO(err_tgt_put, rc = -EXDEV);
+ }
+ }
+
+ OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME4, 5);
+
+ /* lock parents in the proper order. */
+ if (reverse) {
+ rc = mdt_object_lock_save(info, tgt, lh_tgt, 1);
+ if (rc)
+ GOTO(err_tgt_put, rc);
+
+ OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME, 5);
+
+ rc = mdt_object_lock_save(info, src, lh_src, 0);
+ } else {
+ rc = mdt_object_lock_save(info, src, lh_src, 0);
+ if (rc)
+ GOTO(err_tgt_put, rc);
+
+ OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME, 5);
+
+ if (tgt != src)
+ rc = mdt_object_lock_save(info, tgt, lh_tgt, 1);
+ else if (lh_src->mlh_pdo_hash != lh_tgt->mlh_pdo_hash) {
+ rc = mdt_pdir_hash_lock(info, lh_tgt, tgt,
+ MDS_INODELOCK_UPDATE);
+ OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_PDO_LOCK2, 10);
+ }
+ }
+ if (rc)
+ GOTO(err_unlock, rc);
+
+ OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME4, 5);
+
+ *srcp = src;
+ *tgtp = tgt;
+ RETURN(0);
+
+err_unlock:
+ /* The order does not matter as the handle is checked inside,
+ * as well as not used handle. */
+ mdt_object_unlock(info, src, lh_src, rc);
+ mdt_object_unlock(info, tgt, lh_tgt, rc);
+err_tgt_put:
+ mdt_object_put(info->mti_env, tgt);
+err_src_put:
+ mdt_object_put(info->mti_env, src);
+ RETURN(rc);
+}
+