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This is a position in the RM_SHREMAP memory. Since shmems are currently the only user of it, this is validly equals zero, but it will change soon. Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
49 lines
1 KiB
C
49 lines
1 KiB
C
#ifndef __CR_SHMEM_H__
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#define __CR_SHMEM_H__
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#include "lock.h"
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#include "protobuf/vma.pb-c.h"
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/*
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* pid is a pid of a creater
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* start, end are used for open mapping
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* fd is a file discriptor, which is valid for creater,
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* it's opened in cr-restor, because pgoff may be non zero
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*/
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struct shmem_info {
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unsigned long shmid;
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unsigned long start;
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unsigned long end;
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unsigned long size;
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int pid;
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int fd;
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futex_t lock;
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};
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struct _VmaEntry;
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extern int collect_shmem(int pid, struct _VmaEntry *vi);
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extern int prepare_shmem_restore(void);
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extern void show_saved_shmems(void);
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extern int get_shmem_fd(int pid, VmaEntry *vi);
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extern unsigned long nr_shmems;
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extern unsigned long rst_shmems;
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extern int cr_dump_shmem(void);
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extern int add_shmem_area(pid_t pid, VmaEntry *vma);
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static always_inline struct shmem_info *
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find_shmem(struct shmem_info *shmems, int nr, unsigned long shmid)
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{
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struct shmem_info *si;
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int i;
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for (i = 0, si = shmems; i < nr; i++, si++)
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if (si->shmid == shmid)
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return si;
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return NULL;
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}
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#endif /* __CR_SHMEM_H__ */
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