/usr/include/varnish/vsm.h is in libvarnishapi-dev 3.0.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (c) 2006 Verdens Gang AS
* Copyright (c) 2006-2011 Varnish Software AS
* All rights reserved.
*
* Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Define the layout of the shared memory log segment.
*
* NB: THIS IS NOT A PUBLIC API TO VARNISH!
*/
#ifndef VSM_H_INCLUDED
#define VSM_H_INCLUDED
#define VSM_FILENAME "_.vsm"
#include <time.h>
#include <sys/types.h>
/*
* This structure describes each allocation from the shmlog
*/
struct VSM_chunk {
#define VSM_CHUNK_MAGIC 0x43907b6e /* From /dev/random */
unsigned magic;
unsigned len;
unsigned state;
char class[8];
char type[8];
char ident[64];
};
#define VSM_NEXT(sha) ((void*)((uintptr_t)(sha) + (sha)->len))
#define VSM_PTR(sha) ((void*)((uintptr_t)((sha) + 1)))
struct VSM_head {
#define VSM_HEAD_MAGIC 4185512502U /* From /dev/random */
unsigned magic;
unsigned hdrsize;
time_t starttime;
pid_t master_pid;
pid_t child_pid;
unsigned shm_size;
/* Panic message buffer */
char panicstr[64 * 1024];
unsigned alloc_seq;
/* Must be last element */
struct VSM_chunk head;
};
/*
* You must include "miniobj.h" and have an assert function to be
* able to use the VSM_ITER() macro.
*/
#ifdef CHECK_OBJ_NOTNULL
static inline struct VSM_chunk *
vsm_iter_0(void)
{
CHECK_OBJ_NOTNULL(VSM_head, VSM_HEAD_MAGIC);
CHECK_OBJ_NOTNULL(&VSM_head->head, VSM_CHUNK_MAGIC);
return (&VSM_head->head);
}
static inline void
vsm_iter_n(struct VSM_chunk **pp)
{
CHECK_OBJ_NOTNULL(VSM_head, VSM_HEAD_MAGIC);
CHECK_OBJ_NOTNULL(*pp, VSM_CHUNK_MAGIC);
*pp = VSM_NEXT(*pp);
if (*pp >= vsm_end) {
*pp = NULL;
return;
}
CHECK_OBJ_NOTNULL(*pp, VSM_CHUNK_MAGIC);
}
#define VSM_ITER(vd) for ((vd) = vsm_iter_0(); (vd) != NULL; vsm_iter_n(&vd))
#endif /* CHECK_OBJ_NOTNULL */
#endif
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