mirror of
https://github.com/checkpoint-restore/criu.git
synced 2026-07-19 09:35:12 +00:00
cf01381cbd
Currently we dump pages directly from parasite into image files. This is bad for several reasons: 1. We cannot use any more-or-less custom format for pages easily, since parasite code cannot be linked with any libraries; 2. We will not be able to optimize migration with preliminary memory migration (a.k.a. iterative migration) with it -- if we send pages from parasite over network we are not able to let the task we dump continue running. That said, what is done is -- pages from target task are put into a page-pipe in one go, then (not in this patch) parasite can be released and we can do with pages whatever we want. For now pages are just spliced from pipe into image file. Some numbers: In order to drain 1Gb of memory from task we need 1.5M of shared map in args (for iovecs) and 4 pipes (8 descriptors) each referencing 128Mb of pages, which int turn requires 4 x 640K chunks of sequential kernel memory (for pipe_buffer). Not that big I guess. Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
132 lines
2.3 KiB
C
132 lines
2.3 KiB
C
#ifndef __CR_PARASITE_H__
|
|
#define __CR_PARASITE_H__
|
|
|
|
#define PARASITE_STACK_SIZE (16 << 10)
|
|
#define PARASITE_ARG_SIZE_MIN ( 1 << 12)
|
|
|
|
#define PARASITE_MAX_SIZE (64 << 10)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <sys/un.h>
|
|
|
|
#include "image.h"
|
|
#include "util-net.h"
|
|
|
|
#include "protobuf/vma.pb-c.h"
|
|
|
|
#define __head __used __section(.head.text)
|
|
|
|
enum {
|
|
PARASITE_CMD_INIT,
|
|
PARASITE_CMD_INIT_THREAD,
|
|
PARASITE_CMD_CFG_LOG,
|
|
PARASITE_CMD_FINI,
|
|
PARASITE_CMD_FINI_THREAD,
|
|
|
|
PARASITE_CMD_DUMPPAGES,
|
|
|
|
PARASITE_CMD_DUMP_SIGACTS,
|
|
PARASITE_CMD_DUMP_ITIMERS,
|
|
PARASITE_CMD_DUMP_MISC,
|
|
PARASITE_CMD_DUMP_CREDS,
|
|
PARASITE_CMD_DUMP_THREAD,
|
|
PARASITE_CMD_DRAIN_FDS,
|
|
PARASITE_CMD_GET_PROC_FD,
|
|
PARASITE_CMD_DUMP_TTY,
|
|
|
|
PARASITE_CMD_MAX,
|
|
};
|
|
|
|
struct parasite_init_args {
|
|
int h_addr_len;
|
|
struct sockaddr_un h_addr;
|
|
|
|
int p_addr_len;
|
|
struct sockaddr_un p_addr;
|
|
|
|
int nr_threads;
|
|
};
|
|
|
|
struct parasite_log_args {
|
|
int log_level;
|
|
};
|
|
|
|
struct parasite_dump_pages_args {
|
|
unsigned int off;
|
|
unsigned int nr;
|
|
unsigned int nr_pages;
|
|
struct iovec iovs[0];
|
|
};
|
|
|
|
struct parasite_dump_sa_args {
|
|
rt_sigaction_t sas[SIGMAX];
|
|
};
|
|
|
|
struct parasite_dump_itimers_args {
|
|
struct itimerval real;
|
|
struct itimerval virt;
|
|
struct itimerval prof;
|
|
};
|
|
|
|
/*
|
|
* Misc sfuff, that is too small for separate file, but cannot
|
|
* be read w/o using parasite
|
|
*/
|
|
|
|
struct parasite_dump_misc {
|
|
unsigned long brk;
|
|
k_rtsigset_t blocked;
|
|
|
|
u32 pid;
|
|
u32 sid;
|
|
u32 pgid;
|
|
u32 tls;
|
|
u32 umask;
|
|
};
|
|
|
|
#define PARASITE_MAX_GROUPS (PAGE_SIZE / sizeof(unsigned int) - 2 * sizeof(unsigned))
|
|
|
|
struct parasite_dump_creds {
|
|
unsigned int secbits;
|
|
unsigned int ngroups;
|
|
unsigned int groups[PARASITE_MAX_GROUPS];
|
|
};
|
|
|
|
struct parasite_dump_thread {
|
|
unsigned int *tid_addr;
|
|
pid_t tid;
|
|
k_rtsigset_t blocked;
|
|
u32 tls;
|
|
};
|
|
|
|
#define PARASITE_MAX_FDS (PAGE_SIZE / sizeof(int))
|
|
|
|
struct parasite_drain_fd {
|
|
int nr_fds;
|
|
int fds[PARASITE_MAX_FDS];
|
|
};
|
|
|
|
static inline int drain_fds_size(struct parasite_drain_fd *dfds)
|
|
{
|
|
return sizeof(dfds->nr_fds) + dfds->nr_fds * sizeof(dfds->fds[0]);
|
|
}
|
|
|
|
struct parasite_tty_args {
|
|
int fd;
|
|
|
|
int sid;
|
|
int pgrp;
|
|
bool hangup;
|
|
|
|
int st_pckt;
|
|
int st_lock;
|
|
int st_excl;
|
|
};
|
|
|
|
/* the parasite prefix is added by gen_offsets.sh */
|
|
#define parasite_sym(pblob, name) ((void *)(pblob) + parasite_blob_offset__##name)
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
#endif /* __CR_PARASITE_H__ */
|