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// SPDX-License-Identifier: GPL-2.0
/*
 * GPL HEADER START
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 only,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License version 2 for more details (a copy is included
 * in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU General Public License
 * version 2 along with this program; If not, see
 * http://www.gnu.org/licenses/gpl-2.0.html
 *
 * GPL HEADER END
 */
/*
 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
 * Use is subject to license terms.
 *
 * Copyright (c) 2011, 2012, Intel Corporation.
 */
/*
 * This file is part of Lustre, http://www.lustre.org/
 * Lustre is a trademark of Sun Microsystems, Inc.
 *
 * lustre/include/lustre_lib.h
 *
 * Basic Lustre library routines.
 */

#ifndef _LUSTRE_LIB_H
#define _LUSTRE_LIB_H

/** \defgroup lib lib
 *
 * @{
 */

#include <linux/sched/signal.h>
#include <linux/signal.h>
#include <linux/types.h>
#include <linux/libcfs/libcfs.h>
#include <uapi/linux/lustre/lustre_idl.h>
#include <uapi/linux/lustre/lustre_ver.h>
#include <uapi/linux/lustre/lustre_cfg.h>

/* target.c */
struct ptlrpc_request;
struct obd_export;
struct lu_target;
struct l_wait_info;
#include <lustre_ha.h>
#include <lustre_net.h>

#define LI_POISON 0x5a5a5a5a
#if BITS_PER_LONG > 32
# define LL_POISON 0x5a5a5a5a5a5a5a5aL
#else
# define LL_POISON 0x5a5a5a5aL
#endif
#define LP_POISON ((void *)LL_POISON)

int target_pack_pool_reply(struct ptlrpc_request *req);
int do_set_info_async(struct obd_import *imp,
		      int opcode, int version,
		      u32 keylen, void *key,
		      u32 vallen, void *val,
		      struct ptlrpc_request_set *set);

void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id);

#define LUSTRE_FATAL_SIGS (sigmask(SIGKILL) | sigmask(SIGINT) |		\
			   sigmask(SIGTERM) | sigmask(SIGQUIT) |	\
			   sigmask(SIGALRM))
static inline int l_fatal_signal_pending(struct task_struct *p)
{
	return signal_pending(p) && sigtestsetmask(&p->pending.signal, LUSTRE_FATAL_SIGS);
}

/** @} lib */



/* l_wait_event_abortable() is a bit like wait_event_killable()
 * except there is a fixed set of signals which will abort:
 * LUSTRE_FATAL_SIGS
 */
#define l_wait_event_abortable(wq, condition)				\
({									\
	sigset_t __blocked;						\
	int __ret = 0;							\
	__blocked = cfs_block_sigsinv(LUSTRE_FATAL_SIGS);		\
	__ret = wait_event_interruptible(wq, condition);		\
	cfs_restore_sigs(__blocked);					\
	__ret;								\
})

#define l_wait_event_abortable_timeout(wq, condition, timeout)		\
({									\
	sigset_t __blocked;						\
	int __ret = 0;							\
	__blocked = cfs_block_sigsinv(LUSTRE_FATAL_SIGS);		\
	__ret = wait_event_interruptible_timeout(wq, condition, timeout);\
	cfs_restore_sigs(__blocked);					\
	__ret;								\
})

#define l_wait_event_abortable_exclusive(wq, condition)			\
({									\
	sigset_t __blocked;						\
	int __ret = 0;							\
	__blocked = cfs_block_sigsinv(LUSTRE_FATAL_SIGS);		\
	__ret = wait_event_interruptible_exclusive(wq, condition);	\
	cfs_restore_sigs(__blocked);					\
	__ret;								\
})
#endif /* _LUSTRE_LIB_H */