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https://github.com/checkpoint-restore/criu.git
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8801f59615
Since now we drain pages out of parasite, we can invent any format for page dumps. Let is be ... prorobuf one! :) Another thing to keep in mind, is that we're about to use splices and implement iterative migration, so it's better to have actual pages be page-aligned in the image. And -- backward compatibility. That said the new format is: 1. pagemap-... file which contains a header (currently with a ID of the image with pages, see below) and an array of <nr_pages:vaddr> pairs. The first value means "how many pages to take from the file with pages (see below)" and the second -- where in the task address space to put them. Simple. 2. pages-... file which containes only pages one by one (thus aligned as we want). This patch breaks backward compatibility (old images with pages wil be restored and then crash). Need to do it before v0.5 release. Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
79 lines
2.8 KiB
C
79 lines
2.8 KiB
C
#ifndef __CR_PARASITE_SYSCALL_H__
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#define __CR_PARASITE_SYSCALL_H__
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#define BUILTIN_SYSCALL_SIZE 8
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/* parasite control block */
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struct parasite_ctl {
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pid_t pid; /* process pid where we live in */
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void *remote_map;
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void *local_map;
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unsigned long map_length;
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unsigned long parasite_ip; /* service routine start ip */
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user_regs_struct_t regs_orig; /* original registers */
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unsigned long syscall_ip; /* entry point of infection */
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u8 code_orig[BUILTIN_SYSCALL_SIZE];
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int signals_blocked;
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unsigned int *addr_cmd; /* addr for command */
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void *addr_args; /* address for arguments */
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unsigned long args_size;
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int tsock; /* transport socket for transfering fds */
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};
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struct cr_fdset;
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struct list_head;
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extern int parasite_dump_sigacts_seized(struct parasite_ctl *ctl, struct cr_fdset *cr_fdset);
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extern int parasite_dump_itimers_seized(struct parasite_ctl *ctl, struct cr_fdset *cr_fdset);
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struct parasite_dump_misc;
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struct vm_area_list;
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extern int parasite_dump_misc_seized(struct parasite_ctl *ctl, struct parasite_dump_misc *misc);
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struct _CredsEntry;
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extern int parasite_dump_creds(struct parasite_ctl *ctl, struct _CredsEntry *ce);
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extern int parasite_dump_pages_seized(struct parasite_ctl *ctl, int vpid,
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struct vm_area_list *vma_area_list,
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struct cr_fdset *cr_fdset);
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struct parasite_dump_thread;
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struct pid;
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struct _CoreEntry;
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extern int parasite_dump_thread_seized(struct parasite_ctl *ctl, struct pid *tid,
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struct _CoreEntry *core);
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struct parasite_drain_fd;
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struct fd_opts;
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extern int parasite_drain_fds_seized(struct parasite_ctl *ctl,
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struct parasite_drain_fd *dfds,
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int *lfds, struct fd_opts *flags);
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extern int parasite_get_proc_fd_seized(struct parasite_ctl *ctl);
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struct pstree_item;
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extern int parasite_cure_seized(struct parasite_ctl *ctl, struct pstree_item *item);
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extern struct parasite_ctl *parasite_infect_seized(pid_t pid,
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struct pstree_item *item,
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struct vm_area_list *vma_area_list,
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struct parasite_drain_fd *dfds);
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extern struct parasite_ctl *parasite_prep_ctl(pid_t pid, struct vm_area_list *vma_area_list);
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extern int parasite_map_exchange(struct parasite_ctl *ctl, unsigned long size);
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extern struct parasite_tty_args *parasite_dump_tty(struct parasite_ctl *ctl, int fd);
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struct pstree_item;
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extern int parasite_init_threads_seized(struct parasite_ctl *ctl, struct pstree_item *item);
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extern int parasite_fini_threads_seized(struct parasite_ctl *ctl, struct pstree_item *item);
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int syscall_seized(struct parasite_ctl *ctl, int nr, unsigned long *ret,
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unsigned long arg1,
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unsigned long arg2,
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unsigned long arg3,
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unsigned long arg4,
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unsigned long arg5,
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unsigned long arg6);
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extern int __parasite_execute(struct parasite_ctl *ctl, pid_t pid, user_regs_struct_t *regs);
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extern int task_in_compat_mode(pid_t pid);
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#endif /* __CR_PARASITE_SYSCALL_H__ */
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