/usr/src/blcr-0.8.5/include/blcr_vmadump.h is in blcr-dkms 0.8.5-2.1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 | /*
* Berkeley Lab Checkpoint/Restart (BLCR) for Linux is Copyright (c)
* 2007, 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 program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* $Id: blcr_vmadump.h,v 1.17.14.1 2012/12/18 18:32:07 phargrov Exp $
*
* This file provides declarations for BLCR-specific VMADump extensions.
*/
#ifndef _BLCR_VMADUMP_H
#define _BLCR_VMADUMP_H
#ifndef EXPORT_SYMBOL_GPL
#define EXPORT_SYMBOL_GPL EXPORT_SYMBOL
#endif
/* Not maintaining the binfmt code */
#undef HAVE_BINFMT_VMADUMP
/* Flags for dump/undump */
#define VMAD_DUMP_NOSHANON 0x0100 /* let BLCR dump shared anonymous mappings */
#define VMAD_DUMP_NOEXEC 0x0200 /* let BLCR dump the executable */
#define VMAD_DUMP_NOPRIVATE 0x0400 /* let BLCR dump private filenamed memory */
#define VMAD_DUMP_NOSHARED 0x0800 /* let BLCR dump shared filenamed memory */
/* Additional flags */
#define VMAD_DUMP_REGSONLY 0x1000 /* Only thread-specific info */
/* Check for mis-match */
#if defined(CR_CHKPT_DUMP_EXEC) && (CR_CHKPT_DUMP_EXEC != VMAD_DUMP_NOEXEC)
#error "Mismatch CR_CHKPT_DUMP_EXEC vs. VMAD_DUMP_EXEC"
#endif
#if defined(CR_CHKPT_DUMP_PRIVATE) && (CR_CHKPT_DUMP_PRIVATE != VMAD_DUMP_NOPRIVATE)
#error "Mismatch CR_CHKPT_DUMP_PRIVATE vs. VMAD_DUMP_PRIVATE"
#endif
#if defined(CR_CHKPT_DUMP_SHARED) && (CR_CHKPT_DUMP_SHARED != VMAD_DUMP_NOSHARED)
#error "Mismatch CR_CHKPT_DUMP_SHARED vs. VMAD_DUMP_SHARED"
#endif
#ifdef __KERNEL__
#include "blcr_config.h"
#include "blcr_imports.h"
/* Overload the namelen flag to store ARCH-specific mappings */
#define VMAD_NAMELEN_ARCH (PAGE_SIZE+1)
#if defined(ARCH_HAS_SETUP_ADDITIONAL_PAGES)
#define VMAD_HAVE_ARCH_MAPS 1
#elif (defined(CR_KCODE_map_vsyscall) && HAVE_MAP_VSYSCALL)
/* Note care taken w/ map_vsyscall():
* + FC5/x86 declares the symbol but never defines it.
* + x86_64 kernels have a symbol by the same name, but w/ a different purpose
* So, we look for both CR_KCODE_map_vsyscall and HAVE_MAP_VSYSCALL
*/
#define VMAD_HAVE_ARCH_MAPS 1
#elif ((VMAD_ARCH == VMAD_ARCH_x86_64) && defined(CR_KCODE_syscall32_setup_pages))
/* x86_64 kernels prior to 2.6.23 supported the 32-bit vDSO w/o having one of their own */
#define VMAD_HAVE_ARCH_MAPS 1
#else
#define VMAD_HAVE_ARCH_MAPS 0
#endif
#if VMAD_HAVE_ARCH_MAPS
extern int vmad_is_arch_map(const struct vm_area_struct *map);
#else
#define vmad_is_arch_map(map) (0)
#endif
/* Here because vmadump and BLCR must agree */
static inline int vmad_dentry_unlinked(struct dentry *dentry) {
return ((!IS_ROOT(dentry) && d_unhashed(dentry)) ||
(dentry->d_inode->i_nlink == 0) ||
(dentry->d_flags & DCACHE_NFSFS_RENAMED));
}
static inline int vmad_is_exe(struct vm_area_struct *map) {
#if HAVE_VMA_VM_MM && HAVE_MM_EXE_FILE
return (map->vm_mm && (map->vm_mm->exe_file == map->vm_file));
#elif defined(VM_EXECUTABLE)
return (map->vm_flags & VM_EXECUTABLE);
#else
#error "No way to detect /proc/pid/exe"
#endif
}
/* Here because vmadump and BLCR must agree */
static inline int vmad_is_special_mmap(struct vm_area_struct *map, int flags) {
const struct file * const filp = map->vm_file;
const unsigned long vm_flags = map->vm_flags;
BUG_ON(!filp);
if (vmad_is_arch_map(map)) return 0;
#ifdef CONFIG_HUGETLBFS
/* Ignore unlinked status, since hugetlbfs is not persistent */
if (is_vm_hugetlb_page(map)) return 1;
#endif
if (vmad_dentry_unlinked(filp->f_dentry)) {
return (vm_flags & VM_SHARED);
}
return (((flags & VMAD_DUMP_NOEXEC) && vmad_is_exe(map)) ||
((flags & VMAD_DUMP_NOPRIVATE) && !(vm_flags & VM_SHARED)) ||
((flags & VMAD_DUMP_NOSHARED) && (vm_flags & VM_SHARED)));
}
#endif /* defined(__KERNEL__) */
#endif
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