mirror of
https://github.com/checkpoint-restore/criu.git
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dc7abdfb92
We do it first -- on collect, second -- on restore. The 2nd lookup is excessive, we can put fd pointer on vm_area at lookup and reuse one later. Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
#ifndef __CR_VMA_H__
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#define __CR_VMA_H__
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#include "list.h"
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#include "protobuf/vma.pb-c.h"
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struct vm_area_list {
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struct list_head h;
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unsigned nr;
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unsigned long priv_size; /* nr of pages in private VMAs */
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unsigned long longest; /* nr of pages in longest VMA */
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};
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#define VM_AREA_LIST(name) struct vm_area_list name = { .h = LIST_HEAD_INIT(name.h), .nr = 0, }
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static inline void vm_area_list_init(struct vm_area_list *vml)
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{
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INIT_LIST_HEAD(&vml->h);
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vml->nr = 0;
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vml->priv_size = 0;
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vml->longest = 0;
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}
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struct file_desc;
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struct vma_area {
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struct list_head list;
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VmaEntry *e;
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union {
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int vm_file_fd;
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int vm_socket_id;
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struct file_desc *fd;
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};
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unsigned long *page_bitmap; /* existent pages */
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unsigned long *ppage_bitmap; /* parent's existent pages */
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unsigned long premmaped_addr;
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bool file_borrowed;
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struct stat *st;
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};
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extern struct vma_area *alloc_vma_area(void);
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extern int collect_mappings(pid_t pid, struct vm_area_list *vma_area_list);
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extern void free_mappings(struct vm_area_list *vma_area_list);
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extern bool privately_dump_vma(struct vma_area *vma);
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#define vma_area_is(vma_area, s) vma_entry_is((vma_area)->e, s)
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#define vma_area_len(vma_area) vma_entry_len((vma_area)->e)
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#define vma_entry_is(vma, s) (((vma)->status & (s)) == (s))
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#define vma_entry_len(vma) ((vma)->end - (vma)->start)
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/*
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* vma_premmaped_start() can be used only in restorer.
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* In other cases vma_area->premmaped_addr must be used.
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* This hack is required, because vma_area isn't tranfered in restorer and
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* shmid is used to determing which vma-s are cowed.
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*/
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#define vma_premmaped_start(vma) ((vma)->shmid)
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static inline int in_vma_area(struct vma_area *vma, unsigned long addr)
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{
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return addr >= (unsigned long)vma->e->start &&
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addr < (unsigned long)vma->e->end;
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}
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#endif /* __CR_VMA_H__ */
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