/usr/include/blcr_ioctl.h is in libcr-dev 0.8.5-2.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Berkeley Lab Checkpoint/Restart (BLCR) for Linux is Copyright (c)
* 2003, The Regents of the University of California, through Lawrence
* Berkeley National Laboratory (subject to receipt of any required
* approvals from the U.S. Dept. of Energy). All rights reserved.
*
* Portions may be copyrighted by others, as may be noted in specific
* copyright notices within specific files.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* $Id: blcr_ioctl.h,v 1.38 2008/08/16 00:17:11 phargrov Exp $
*/
#ifndef _CR_IOCTL_H
#define _CR_IOCTL_H 1
#define CR_IOCTL_BASE 0xA1
//
// ioctl()s for libcr/callback code:
//
// CR_OP_HAND_CHKPT(unsigned long flags)
// Called from libcr when the callbacks have run their CHECKPOINT
// code and the thread is prepared for the kernel to save it.
#define CR_OP_HAND_CHKPT _IOW (CR_IOCTL_BASE, 0x01, unsigned long)
// CR_OP_HAND_ABORT(unsigned long flags)
// Called from libcr when a callback wishes to abort the checkpoint/restart.
// If flags is set to CR_CHECKPOINT_PERM_FAILURE, all processes in the
// checkpoint are killed.
#define CR_OP_HAND_ABORT _IOW (CR_IOCTL_BASE, 0x02, unsigned long)
// 0x03 was CR_OP_HAND_CONT
// 0x04 was CR_OP_HAND_RSTRT
// CR_OP_HAND_PHASE1(long fd)
// This is how a Phase1 thread/task announces itself to the kernel.
#define CR_OP_HAND_PHASE1 _IOW (CR_IOCTL_BASE, 0x05, long)
// CR_OP_HAND_SUSP(struct timeval * timeout)
// Block in the kernel until one of the following three things happens:
// 1) A checkpoint request arrives for this thread.
// 2) A signal arrives for this thread.
// 3) The timeout expires.
// The timeout argument works exactly as in select(2).
#define CR_OP_HAND_SUSP _IOWR(CR_IOCTL_BASE, 0x06, struct timeval *)
// CR_OP_HAND_PHASE2(long fd)
// This is how a Phase2 thread/task announces itself to the kernel.
#define CR_OP_HAND_PHASE2 _IOW (CR_IOCTL_BASE, 0x07, long)
// CR_OP_HAND_DONE(unsigned long flags)
// Called from libcr when the callbacks have run to completion
// and the thread is just about to resume execution
// (returning from the signal handler or from cr_leave_cs).
// This is the chance for the kernel to SIGSTOP us if we are to
// be placed in a STOPPED state.
#define CR_OP_HAND_DONE _IOW (CR_IOCTL_BASE, 0x08, unsigned long)
// CR_OP_HAND_SRC(char *buffer)
// This is how libcr queries the restart source.
// The argument is a buffer of len >= PATH_MAX
// The result is a string:
// Empty if the source is not in the file system
// Full path if source is a file, device, fifo, etc.
// Path ending in "/." if source is a directory.
#define CR_OP_HAND_SRC _IOR (CR_IOCTL_BASE, 0x09, char *)
// CR_OP_HAND_CHKPT_INFO(struct cr_chkpt_info *)
// This is how cr_get_checkpoint_info() is implemented.
#define CR_OP_HAND_CHKPT_INFO _IOR (CR_IOCTL_BASE, 0x0a, struct cr_chkpt_info *)
//
// ioctl()s for cr_checkpoint:
//
// CR_OP_CHKPT_REQ(struct cr_chkpt_args *args)
// Called to request a checkpoint of a task/proc/pgrp/session.
#define CR_OP_CHKPT_REQ _IOW (CR_IOCTL_BASE, 0x10, struct cr_chkpt_args *)
// 0x11 was CR_OP_CHKPT_DONE
// CR_OP_CHKPT_REAP(void)
// Called to reap a completed checkpoint.
// This is necessary if you wish to issue a new request on the same
// file descriptor, and is recommended as a polite way to cleanup.
// However, closing the fd (or exiting) will do this implicitly.
#define CR_OP_CHKPT_REAP _IO (CR_IOCTL_BASE, 0x12)
// CR_OP_CHKPT_FWD(struct cr_fwd_args *args)
// Called to propagate a checkpoint request to another process.
#define CR_OP_CHKPT_FWD _IOW (CR_IOCTL_BASE, 0x13, struct cr_fwd_args *)
// CR_OP_CHKPT_LOG(struct cr_log_args *args)
// Called to collect error/warning log from a completed checkpoint.
// arg.buf is the space allocated for the result
// arg.len is the length of buf
// Return value is value of arg.len required to receive full log.
// arg.buf is always nul-terminated if return >= 0.
#define CR_OP_CHKPT_LOG _IOR (CR_IOCTL_BASE, 0x14, struct cr_log_args *)
//
// ioctl()s for cr_restart:
//
// CR_OP_RSTRT_REQ(struct cr_rstrt_args *args)
// Called to request a restart from a given file descriptor.
#define CR_OP_RSTRT_REQ _IOW (CR_IOCTL_BASE, 0x20,\
struct cr_rstrt_args *)
// 0x21 was CR_OP_RSTRT_DONE
// CR_OP_RSTRT_REAP(void)
// Called to reap a completed restart.
// This is necessary if you wish to issue a new request on the same
// file descriptor, and is recommended as a polite way to cleanup.
// However, closing the fd (or exiting) will do this implicitly.
#define CR_OP_RSTRT_REAP _IO (CR_IOCTL_BASE, 0x22)
// CR_OP_RSTRT_CHILD(void)
// Called to overlay a process with a restart image.
// Acts like exec(). Will not return unless there has been an error.
#define CR_OP_RSTRT_CHILD _IO (CR_IOCTL_BASE, 0x23)
// 0x24 : was OP_RSTRT_CLONES
// 0x25 : was OP_RSTRT_FORKS
// CR_OP_RSTRT_PROCS(struct cr_procs_tbl **)
// Called to determine if more processes are needed.
// Returns 0 if done, positive if not, or negative on error.
// Stores info on needed procs to supplied address.
#define CR_OP_RSTRT_PROCS _IOR (CR_IOCTL_BASE, 0x26,\
struct cr_procs_tbl *)
// CR_OP_RSTRT_LOG(struct cr_log_args *args)
// Called to collect error/warning log from a completed restart.
// arg.buf is the space allocated for the result
// arg.len is the length of buf
// Return value is value of arg.len required to receive full log.
// arg.buf is always nul-terminated if return >= 0.
#define CR_OP_RSTRT_LOG _IOR (CR_IOCTL_BASE, 0x27, struct cr_log_args *)
//
// ioctl()s for general use:
//
// CR_OP_VERSION(unsigned long version)
// Called to verify the kernel supports the specified version
// where version = (CR_MODULE_MAJOR << 16) | CR_MODULE_MINOR
// Return of 0 is success, meaning we support that version.
#define CR_OP_VERSION _IOW (CR_IOCTL_BASE, 0x30, unsigned long)
#endif
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