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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>
115 lines
2.8 KiB
C
115 lines
2.8 KiB
C
#ifndef __CR_PROTOBUF_H__
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#define __CR_PROTOBUF_H__
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#include "asm/types.h"
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#include "compiler.h"
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#include "util.h"
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enum {
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PB_INVENTORY,
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PB_FDINFO,
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PB_CORE,
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PB_MM,
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PB_VMAS,
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PB_SIGACT,
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PB_ITIMERS,
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PB_CREDS,
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PB_FS,
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PB_UTSNS,
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PB_IPCNS_VAR,
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PB_IPCNS_SHM,
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PB_IPCNS_MSG,
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PB_IPCNS_MSG_ENT,
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PB_IPCNS_SEM,
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PB_MOUNTPOINTS,
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PB_NETDEV,
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PB_PSTREE,
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PB_GHOST_FILE,
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PB_TCP_STREAM,
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PB_SK_QUEUES,
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PB_REG_FILES,
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PB_INETSK,
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PB_UNIXSK,
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PB_PACKETSK,
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PB_PIPES,
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PB_FIFO,
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PB_PIPES_DATA,
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PB_REMAP_FPATH,
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PB_EVENTFD,
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PB_EVENTPOLL,
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PB_EVENTPOLL_TFD,
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PB_SIGNALFD,
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PB_INOTIFY,
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PB_INOTIFY_WD,
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PB_FANOTIFY,
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PB_FANOTIFY_MARK,
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PB_TTY,
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PB_TTY_INFO,
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PB_FILE_LOCK,
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PB_RLIMIT,
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PB_IDS,
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PB_PAGEMAP_HEAD,
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PB_PAGEMAP,
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PB_MAX
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};
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/*
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* ATTENTION
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*
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* This typdefs represent "generic" prototypes for
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* pack/unpack/getsize functions generated by PB
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* engine, thus (!!!) if PB engine change arguments
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* order or their number we may meet serious problems.
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*
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* FIXME
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*
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* Find a way to verify PB generated functions statemens
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* to match this typedefs.
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*/
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void cr_pb_init(void);
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extern int do_pb_read_one(int fd, void **objp, int type, bool eof);
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#define pb_read_one(fd, objp, type) do_pb_read_one(fd, (void **)objp, type, false)
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#define pb_read_one_eof(fd, objp, type) do_pb_read_one(fd, (void **)objp, type, true)
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extern int pb_write_one(int fd, void *obj, int type);
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#define pb_pksize(__obj, __proto_message_name) \
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(__proto_message_name ##__get_packed_size(__obj) + sizeof(u32))
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#define pb_repeated_size(__obj, __member) \
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((size_t)(sizeof(*(__obj)->__member) * (__obj)->n_ ##__member))
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#define pb_msg(__base, __type) \
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container_of(__base, __type, base)
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#include <google/protobuf-c/protobuf-c.h>
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extern void do_pb_show_plain(int fd, int type, int single_entry,
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void (*payload_hadler)(int fd, void *obj, int flags),
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int flags, const char *pretty_fmt);
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/* Don't have objects at hands to also do typechecking here */
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#define pb_show_plain_payload_pretty(__fd, __type, payload_hadler, flags, pretty) \
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do_pb_show_plain(__fd, __type, 0, payload_hadler, flags, pretty)
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#define pb_show_plain_payload(__fd, __proto_message_name, payload_hadler, flags) \
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pb_show_plain_payload_pretty(__fd, __proto_message_name, payload_hadler, flags, NULL)
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#define pb_show_plain_pretty(__fd, __proto_message_name, __pretty) \
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pb_show_plain_payload_pretty(__fd, __proto_message_name, NULL, 0, __pretty)
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#define pb_show_plain(__fd, __type) \
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pb_show_plain_payload(__fd, __type, NULL, 0)
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#define pb_show_vertical(__fd, __type) \
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do_pb_show_plain(__fd, __type, 1, NULL, 0, NULL)
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int collect_image(int fd_t, int obj_t, unsigned size,
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int (*collect)(void *obj, ProtobufCMessage *msg));
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int collect_image_sh(int fd_t, int obj_t, unsigned size,
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int (*collect)(void *obj, ProtobufCMessage *msg));
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#endif /* __CR_PROTOBUF_H__ */
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