mirror of
https://github.com/checkpoint-restore/criu.git
synced 2026-07-21 01:06:58 +00:00
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>
84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
#ifndef __CR_SOCKETS_H__
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#define __CR_SOCKETS_H__
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#include <stdbool.h>
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#include "asm/types.h"
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#include "protobuf.h"
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#include "protobuf/sk-opts.pb-c.h"
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struct fdinfo_list_entry;
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struct sk_opts_entry;
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struct file_desc;
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struct fd_parms;
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struct cr_imgset;
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struct nlmsghdr;
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struct cr_img;
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struct socket_desc {
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unsigned int family;
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unsigned int ino;
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struct socket_desc *next;
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int already_dumped;
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};
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extern int dump_socket(struct fd_parms *p, int lfd, struct cr_img *);
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extern int dump_socket_opts(int sk, SkOptsEntry *soe);
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extern int restore_socket_opts(int sk, SkOptsEntry *soe);
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extern void release_skopts(SkOptsEntry *);
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extern int restore_prepare_socket(int sk);
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extern bool socket_test_collect_bit(unsigned int family, unsigned int proto);
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extern int sk_collect_one(int ino, int family, struct socket_desc *d);
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extern int collect_sockets(int pid);
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extern int collect_inet_sockets(void);
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extern struct collect_image_info unix_sk_cinfo;
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extern int collect_unix_sockets(void);
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extern int fix_external_unix_sockets(void);
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extern int resolve_unix_peers(void);
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extern struct collect_image_info netlink_sk_cinfo;
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extern char *skfamily2s(u32 f);
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extern char *sktype2s(u32 t);
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extern char *skproto2s(u32 p);
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extern char *skstate2s(u32 state);
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extern struct socket_desc *lookup_socket(int ino, int family, int proto);
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extern const struct fdtype_ops unix_dump_ops;
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extern const struct fdtype_ops inet_dump_ops;
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extern const struct fdtype_ops inet6_dump_ops;
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extern const struct fdtype_ops netlink_dump_ops;
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extern const struct fdtype_ops packet_dump_ops;
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extern int inet_collect_one(struct nlmsghdr *h, int family, int type);
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extern int unix_receive_one(struct nlmsghdr *h, void *);
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extern int netlink_receive_one(struct nlmsghdr *hdr, void *arg);
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extern int do_dump_opt(int sk, int level, int name, void *val, int len);
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#define dump_opt(s, l, n, f) do_dump_opt(s, l, n, f, sizeof(*f))
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extern int do_restore_opt(int sk, int level, int name, void *val, int len);
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#define restore_opt(s, l, n, f) do_restore_opt(s, l, n, f, sizeof(*f))
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#define sk_encode_shutdown(img, mask) do { \
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/* \
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* protobuf SK_SHUTDOWN__ bits match those \
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* reported by kernel \
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*/ \
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(img)->shutdown = mask; \
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if ((img)->shutdown != SK_SHUTDOWN__NONE) \
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(img)->has_shutdown = true; \
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} while (0)
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static inline int sk_decode_shutdown(int val)
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{
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static const int hows[] = {-1, SHUT_RD, SHUT_WR, SHUT_RDWR};
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return hows[val];
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}
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#define USK_EXT_PARAM "ext-unix-sk"
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#endif /* __CR_SOCKETS_H__ */
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