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https://github.com/checkpoint-restore/criu.git
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295090c1ea
We want to have buffered images to speed up dump and, slightly, restore. Right now we use plan file descriptors to write and read images to/from. Making them buffered cannot be gracefully done on plain fds, so introduce a new class. This will also help if (when?) we will want to do more complex changes with images, e.g. store them all in one file or send them directly to the network. For now the cr_img just contains one int _fd variable. This patch chages the prototype of open_image() to return struct cr_img *, pb_(read|write)* to accept one and fixes the compilation of the rest of the code :) Signed-off-by: Pavel Emelyanov <xemul@parallels.com> Acked-by: Cyrill Gorcunov <gorcunov@openvz.org>
58 lines
1.9 KiB
C
58 lines
1.9 KiB
C
#ifndef __CR_PROTOBUF_H__
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#define __CR_PROTOBUF_H__
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#include "protobuf-desc.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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struct cr_img;
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extern int do_pb_read_one(struct cr_img *, 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(struct cr_img *, 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(struct cr_img *, int type, int single_entry,
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void (*payload_hadler)(struct cr_img *, void *obj),
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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, pretty) \
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do_pb_show_plain(__fd, __type, 0, payload_hadler, pretty)
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#define pb_show_plain_payload(__fd, __proto_message_name, payload_hadler) \
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pb_show_plain_payload_pretty(__fd, __proto_message_name, payload_hadler, 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, __pretty)
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struct collect_image_info {
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int fd_type;
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int pb_type;
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unsigned int priv_size;
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int (*collect)(void *, ProtobufCMessage *);
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unsigned flags;
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};
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#define COLLECT_SHARED 0x1 /* use shared memory for obj-s */
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#define COLLECT_OPTIONAL 0x2 /* image file may be missing */
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#define COLLECT_HAPPENED 0x4 /* image was opened and collected */
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extern int collect_image(struct collect_image_info *);
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#endif /* __CR_PROTOBUF_H__ */
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