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https://github.com/checkpoint-restore/criu.git
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d4735a22fa
Three parts. Proc: open of map_files' link doesn't work on sockets. We fstatat it and check that it's a socket (it will be packet), then save the socket inode on vma_area. Dump: we resolve socket inode to socket id and save it on vma. We use id, not inode, since on restore we'll have to mmap some opened file, not just abstract socket with inode. Restore: when reading vma-s we just need to find out on what fd the respective packet socket is opened (i.e. -- no map-and-close sockets supported by now) and dup() it to let restorer mmap it back. All this make it possible to c/r the tcpdump tool! Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
40 lines
859 B
C
40 lines
859 B
C
#ifndef __CR_SK_PACKET_H__
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#define __CR_SK_PACKET_H__
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#ifndef PACKET_TIMESTAMP
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#define PACKET_TIMESTAMP 17
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#endif
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struct cr_fdset;
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struct fd_parms;
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struct cr_options;
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struct vma_area;
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int dump_one_packet_sk(struct fd_parms *p, int lfd, const struct cr_fdset *fds);
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int collect_packet_sockets(void);
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void show_packetsk(int fd, struct cr_options *);
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int dump_socket_map(struct vma_area *vma);
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int get_socket_fd(int pid, VmaEntry *vma);
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extern int packet_receive_one(struct nlmsghdr *h, void *arg);
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#ifndef PACKET_VNET_HDR
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#define PACKET_VNET_HDR 15
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#endif
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#ifndef PACKET_FANOUT
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#define PACKET_FANOUT 18
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struct tpacket_req3 {
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unsigned int tp_block_size;
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unsigned int tp_block_nr;
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unsigned int tp_frame_size;
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unsigned int tp_frame_nr;
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unsigned int tp_retire_blk_tov;
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unsigned int tp_sizeof_priv;
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unsigned int tp_feature_req_word;
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};
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#endif
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#endif
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