C++ LBUG函数代码示例

string pluralize(string str)
{
  switch (str)
  {
    case "were": return "was";
    case "don't": return "doesn't";
    case "aren't": return "isn't";
    case "possum": return "possums";
    case "staff": return "staves";
    case "die": return "dies";
    case "laf": return "lafs";
    case "barf": return "barfs";
    case "snarf": return "snarfs";
    case "hum": return "hums";
  }

  if ( str[<2..<1] == "ff" )	/* e.g. "bluff" */
    return str + "s";
// Temporary fix for MudOS v22.2b13 pluralizing elf as eves
  if ( str[<1..<1] == "f" )
{
LBUG(str);
    return str[0..<2] + "ves";
}
  if ( str[<5..<1] == "penis" )
    return str + "es";

  return efun::pluralize(str);
}	

static int osc_lock_unuse(const struct lu_env *env,
			  const struct cl_lock_slice *slice)
{
	struct osc_lock *ols = cl2osc_lock(slice);

	LINVRNT(osc_lock_invariant(ols));

	switch (ols->ols_state) {
	case OLS_NEW:
		LASSERT(!ols->ols_hold);
		LASSERT(ols->ols_agl);
		return 0;
	case OLS_UPCALL_RECEIVED:
		osc_lock_unhold(ols);
	case OLS_ENQUEUED:
		LASSERT(!ols->ols_hold);
		osc_lock_detach(env, ols);
		ols->ols_state = OLS_NEW;
		return 0;
	case OLS_GRANTED:
		LASSERT(!ols->ols_glimpse);
		LASSERT(ols->ols_hold);
		/*
		 * Move lock into OLS_RELEASED state before calling
		 * osc_cancel_base() so that possible synchronous cancellation
		 * (that always happens e.g., for liblustre) sees that lock is
		 * released.
		 */
		ols->ols_state = OLS_RELEASED;
		return osc_lock_unhold(ols);
	default:
		CERROR("Impossible state: %d\n", ols->ols_state);
		LBUG();
	}
}

int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
		    void *lmm, int lmmsize, struct lookup_intent *it,
		    int flags, struct ptlrpc_request **reqp,
		    ldlm_blocking_callback cb_blocking,
		    __u64 extra_lock_flags)
{
	struct obd_device *obd = exp->exp_obd;
	int		rc;

	LASSERT(it != NULL);
	LASSERT(fid_is_sane(&op_data->op_fid1));

	CDEBUG(D_INODE, "INTENT LOCK '%s' for '%*s' on "DFID"\n",
	       LL_IT2STR(it), op_data->op_namelen, op_data->op_name,
	       PFID(&op_data->op_fid1));

	rc = lmv_check_connect(obd);
	if (rc)
		return rc;

	if (it->it_op & (IT_LOOKUP | IT_GETATTR | IT_LAYOUT))
		rc = lmv_intent_lookup(exp, op_data, lmm, lmmsize, it,
				       flags, reqp, cb_blocking,
				       extra_lock_flags);
	else if (it->it_op & IT_OPEN)
		rc = lmv_intent_open(exp, op_data, lmm, lmmsize, it,
				     flags, reqp, cb_blocking,
				     extra_lock_flags);
	else
		LBUG();
	return rc;
}

static void
lnet_selftest_exit(void)
{
	int i;

	switch (lst_init_step) {
	case LST_INIT_CONSOLE:
		lstcon_console_fini();
	case LST_INIT_FW:
		sfw_shutdown();
	case LST_INIT_RPC:
		srpc_shutdown();
	case LST_INIT_WI_TEST:
		for (i = 0;
		     i < cfs_cpt_number(lnet_cpt_table()); i++) {
			if (!lst_sched_test[i])
				continue;
			cfs_wi_sched_destroy(lst_sched_test[i]);
		}
		LIBCFS_FREE(lst_sched_test,
			    sizeof(lst_sched_test[0]) *
			    cfs_cpt_number(lnet_cpt_table()));
		lst_sched_test = NULL;

	case LST_INIT_WI_SERIAL:
		cfs_wi_sched_destroy(lst_sched_serial);
		lst_sched_serial = NULL;
	case LST_INIT_NONE:
		break;
	default:
		LBUG();
	}
}

static int llog_lvfs_next_block(struct llog_handle *loghandle, int *cur_idx,
                                int next_idx, __u64 *cur_offset, void *buf,
                                int len)
{
        LBUG();
        return 0;
}

static int osd_dir_it_key_size(const struct lu_env *env, const struct dt_it *di)
{
	struct osd_zap_it *it = (struct osd_zap_it *)di;
	zap_attribute_t	  *za = &osd_oti_get(env)->oti_za;
	int		   rc;
	ENTRY;

	if (it->ozi_pos <= 1) {
		it->ozi_pos = 1;
		RETURN(2);
	} else if (it->ozi_pos == 2) {
		RETURN(3);
	}

	if ((rc = -zap_cursor_retrieve(it->ozi_zc, za)) == 0)
		rc = strlen(za->za_name);

#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 3, 90, 0)
	if (rc == 0 && za->za_name[0] == '.') {
		if (za->za_name[1] == 0 || (za->za_name[1] == '.' &&
		    za->za_name[2] == 0)) {
			/* we should not get onto . and ..
			 * stored in the directory. ->next() and
			 * other methods should prevent this
			 */
			LBUG();
		}
	}
#endif
	RETURN(rc);
}

int lov_read_and_clear_async_rc(struct cl_object *clob)
{
	struct lu_object *luobj;
	int rc = 0;

	luobj = lu_object_locate(&cl_object_header(clob)->coh_lu,
				 &lov_device_type);
	if (luobj != NULL) {
		struct lov_object *lov = lu2lov(luobj);

		lov_conf_freeze(lov);
		switch (lov->lo_type) {
		case LLT_RAID0: {
			struct lov_stripe_md *lsm;
			int i;

			lsm = lov->lo_lsm;
			LASSERT(lsm != NULL);
			for (i = 0; i < lsm->lsm_stripe_count; i++) {
				struct lov_oinfo *loi = lsm->lsm_oinfo[i];
				if (loi->loi_ar.ar_rc && !rc)
					rc = loi->loi_ar.ar_rc;
				loi->loi_ar.ar_rc = 0;
			}
		}
		case LLT_RELEASED:
		case LLT_EMPTY:
			break;
		default:
			LBUG();
		}
		lov_conf_thaw(lov);
	}
	return rc;
}

void ptlrpc_ni_fini(void)
{
	wait_queue_head_t	 waitq;
	struct l_wait_info  lwi;
	int		 rc;
	int		 retries;

	/* Wait for the event queue to become idle since there may still be
	 * messages in flight with pending events (i.e. the fire-and-forget
	 * messages == client requests and "non-difficult" server
	 * replies */

	for (retries = 0;; retries++) {
		rc = LNetEQFree(ptlrpc_eq_h);
		switch (rc) {
		default:
			LBUG();

		case 0:
			LNetNIFini();
			return;

		case -EBUSY:
			if (retries != 0)
				CWARN("Event queue still busy\n");

			/* Wait for a bit */
			init_waitqueue_head(&waitq);
			lwi = LWI_TIMEOUT(cfs_time_seconds(2), NULL, NULL);
			l_wait_event(waitq, 0, &lwi);
			break;
		}
	}
	/* notreached */
}

static int libcfs_force_lbug(struct ctl_table *table, int write,
			     void __user *buffer,
			     size_t *lenp, loff_t *ppos)
{
	if (write)
		LBUG();
	return 0;
}

static int llog_lvfs_write_rec(struct llog_handle *loghandle,
                               struct llog_rec_hdr *rec,
                               struct llog_cookie *reccookie, int cookiecount,
                               void *buf, int idx)
{
        LBUG();
        return 0;
}

/* if object is dying, pack the lov/llog data,
 * parameter info->mti_attr should be valid at this point! */
int mdt_handle_last_unlink(struct mdt_thread_info *info, struct mdt_object *mo,
                           const struct md_attr *ma)
{
        struct mdt_body       *repbody;
        const struct lu_attr *la = &ma->ma_attr;
        int rc;
        ENTRY;

        repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
        LASSERT(repbody != NULL);

        if (ma->ma_valid & MA_INODE)
                mdt_pack_attr2body(info, repbody, la, mdt_object_fid(mo));

        if (ma->ma_valid & MA_LOV) {
                __u32 mode;

                if (mdt_object_exists(mo) < 0)
                        /* If it is a remote object, and we do not retrieve
                         * EA back unlink reg file*/
                        mode = S_IFREG;
                else
                        mode = lu_object_attr(&mo->mot_obj.mo_lu);

                LASSERT(ma->ma_lmm_size);
                mdt_dump_lmm(D_INFO, ma->ma_lmm);
                repbody->eadatasize = ma->ma_lmm_size;
                if (S_ISREG(mode))
                        repbody->valid |= OBD_MD_FLEASIZE;
                else if (S_ISDIR(mode))
                        repbody->valid |= OBD_MD_FLDIREA;
                else
                        LBUG();
        }

        if (ma->ma_cookie_size && (ma->ma_valid & MA_COOKIE)) {
                repbody->aclsize = ma->ma_cookie_size;
                repbody->valid |= OBD_MD_FLCOOKIE;
        }

        if (info->mti_mdt->mdt_opts.mo_oss_capa &&
            info->mti_exp->exp_connect_flags & OBD_CONNECT_OSS_CAPA &&
            repbody->valid & OBD_MD_FLEASIZE) {
                struct lustre_capa *capa;

                capa = req_capsule_server_get(info->mti_pill, &RMF_CAPA2);
                LASSERT(capa);
                capa->lc_opc = CAPA_OPC_OSS_DESTROY;
                rc = mo_capa_get(info->mti_env, mdt_object_child(mo), capa, 0);
                if (rc)
                        RETURN(rc);

                repbody->valid |= OBD_MD_FLOSSCAPA;
        }

        RETURN(0);
}

/**
 * Companion of qsd_request_enter() dropping lqe_pending_req to 0.
 */
static inline void qsd_request_exit(struct lquota_entry *lqe)
{
	if (lqe->lqe_pending_req != 1) {
		LQUOTA_ERROR(lqe, "lqe_pending_req != 1!!!");
		LBUG();
	}
	lqe->lqe_pending_req--;
	lqe->lqe_pending_rel = 0;
	wake_up_all(&lqe->lqe_waiters);
}

/**
 * Lock upcall function that is executed either when a reply to ENQUEUE rpc is
 * received from a server, or after osc_enqueue_base() matched a local DLM
 * lock.
 */
static int osc_lock_upcall(void *cookie, struct lustre_handle *lockh,
			   int errcode)
{
	struct osc_lock         *oscl  = cookie;
	struct cl_lock_slice    *slice = &oscl->ols_cl;
	struct lu_env           *env;
	int			rc;

	ENTRY;

	env = cl_env_percpu_get();
	/* should never happen, similar to osc_ldlm_blocking_ast(). */
	LASSERT(!IS_ERR(env));

	rc = ldlm_error2errno(errcode);
	if (oscl->ols_state == OLS_ENQUEUED) {
		oscl->ols_state = OLS_UPCALL_RECEIVED;
	} else if (oscl->ols_state == OLS_CANCELLED) {
		rc = -EIO;
	} else {
		CERROR("Impossible state: %d\n", oscl->ols_state);
		LBUG();
	}

	if (rc == 0)
		osc_lock_granted(env, oscl, lockh, errcode == ELDLM_OK);

	/* Error handling, some errors are tolerable. */
	if (oscl->ols_locklessable && rc == -EUSERS) {
		/* This is a tolerable error, turn this lock into
		 * lockless lock.
		 */
		osc_object_set_contended(cl2osc(slice->cls_obj));
		LASSERT(slice->cls_ops != oscl->ols_lockless_ops);

		/* Change this lock to ldlmlock-less lock. */
		osc_lock_to_lockless(env, oscl, 1);
		oscl->ols_state = OLS_GRANTED;
		rc = 0;
	} else if (oscl->ols_glimpse && rc == -ENAVAIL) {
		LASSERT(oscl->ols_flags & LDLM_FL_LVB_READY);
		osc_lock_lvb_update(env, cl2osc(slice->cls_obj),
				    NULL, &oscl->ols_lvb);
		/* Hide the error. */
		rc = 0;
	} else if (rc < 0 && oscl->ols_flags & LDLM_FL_NDELAY) {
		rc = -EWOULDBLOCK;
	}

	if (oscl->ols_owner != NULL)
		cl_sync_io_note(env, oscl->ols_owner, rc);
	cl_env_percpu_put(env);

	RETURN(rc);
}

int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
		    struct lookup_intent *it, struct ptlrpc_request **reqp,
		    ldlm_blocking_callback cb_blocking,
		    __u64 extra_lock_flags)
{
	struct obd_device *obd = exp->exp_obd;
	int		   rc;
	ENTRY;

	LASSERT(it != NULL);
	LASSERT(fid_is_sane(&op_data->op_fid1));

	CDEBUG(D_INODE, "INTENT LOCK '%s' for "DFID" '%.*s' on "DFID"\n",
		LL_IT2STR(it), PFID(&op_data->op_fid2),
		(int)op_data->op_namelen, op_data->op_name,
		PFID(&op_data->op_fid1));

	rc = lmv_check_connect(obd);
	if (rc)
		RETURN(rc);

	if (it->it_op & (IT_LOOKUP | IT_GETATTR | IT_LAYOUT))
		rc = lmv_intent_lookup(exp, op_data, it, reqp, cb_blocking,
				       extra_lock_flags);
	else if (it->it_op & IT_OPEN)
		rc = lmv_intent_open(exp, op_data, it, reqp, cb_blocking,
				     extra_lock_flags);
	else
		LBUG();

	if (rc < 0) {
		struct lustre_handle lock_handle;

		if (it->d.lustre.it_lock_mode != 0) {
			lock_handle.cookie = it->d.lustre.it_lock_handle;
			ldlm_lock_decref(&lock_handle,
					 it->d.lustre.it_lock_mode);
		}

		it->d.lustre.it_lock_handle = 0;
		it->d.lustre.it_lock_mode = 0;

		if (it->d.lustre.it_remote_lock_mode != 0) {
			lock_handle.cookie = it->d.lustre.it_remote_lock_handle;
			ldlm_lock_decref(&lock_handle,
					 it->d.lustre.it_remote_lock_mode);
		}

		it->d.lustre.it_remote_lock_handle = 0;
		it->d.lustre.it_remote_lock_mode = 0;
	}

	RETURN(rc);
}

/* Unpack LOV object metadata from disk storage.  It is packed in LE byte
 * order and is opaque to the networking layer.
 */
int lov_unpackmd(struct obd_export *exp,  struct lov_stripe_md **lsmp,
                 struct lov_mds_md *lmm, int lmm_bytes)
{
        struct obd_device *obd = class_exp2obd(exp);
        struct lov_obd *lov = &obd->u.lov;
        int rc = 0, lsm_size;
        __u16 stripe_count;
        __u32 magic;
	__u32 pattern;
        ENTRY;

        /* If passed an MDS struct use values from there, otherwise defaults */
        if (lmm) {
                rc = lov_verify_lmm(lmm, lmm_bytes, &stripe_count);
                if (rc)
                        RETURN(rc);
                magic = le32_to_cpu(lmm->lmm_magic);
		pattern = le32_to_cpu(lmm->lmm_pattern);
        } else {
                magic = LOV_MAGIC;
                stripe_count = lov_get_stripecnt(lov, magic, 0);
		pattern = LOV_PATTERN_RAID0;
        }

        /* If we aren't passed an lsmp struct, we just want the size */
        if (!lsmp) {
                /* XXX LOV STACKING call into osc for sizes */
                LBUG();
                RETURN(lov_stripe_md_size(stripe_count));
        }
        /* If we are passed an allocated struct but nothing to unpack, free */
        if (*lsmp && !lmm) {
                lov_free_memmd(lsmp);
                RETURN(0);
        }

        lsm_size = lov_alloc_memmd(lsmp, stripe_count, pattern, magic);
        if (lsm_size < 0)
                RETURN(lsm_size);

        /* If we are passed a pointer but nothing to unpack, we only alloc */
        if (!lmm)
                RETURN(lsm_size);

        LASSERT(lsm_op_find(magic) != NULL);
        rc = lsm_op_find(magic)->lsm_unpackmd(lov, *lsmp, lmm);
        if (rc) {
                lov_free_memmd(lsmp);
                RETURN(rc);
        }

        RETURN(lsm_size);
}