mirror of
https://github.com/checkpoint-restore/criu
synced 2025-08-25 19:38:38 +00:00
dcf688b0d6
Currently we restore all sockets in the root mount namespace, because we were not able to get any information about a mount point where a socket is bound. It is obviously incorrect in some cases. In 4.10 kernel, we added the SIOCUNIXFILE ioctl for unix sockets. This ioctl opens a file to which a socket is bound and returns a file descriptor. This new ioctl allows us to get mnt_id by reading fdinfo, and mnt_id is enough to find a proper mount point and a mount namespace. The logic of this patch is straight forward. On dump, we save mnt_id for sockets, on restore we find a mount namespace by mnt_id and restore this socket in its mount namespace. Acked-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
55 lines
1.4 KiB
Protocol Buffer
55 lines
1.4 KiB
Protocol Buffer
syntax = "proto2";
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import "opts.proto";
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import "fown.proto";
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import "sk-opts.proto";
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message file_perms_entry {
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required uint32 mode = 1;
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required uint32 uid = 2;
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required uint32 gid = 3;
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}
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message unix_sk_entry {
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/*
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* Few words about why we need both -- id and ino.
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*
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* The former one is used to link file descriptor from
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* fdinfo image with the unix_sk_entry that should be
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* opened under it.
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*
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* The latter one ties together unix peers -- the peer
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* member on this structure is the ino one of its peer
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* and simetimes vise-versa.
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*/
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required uint32 id = 1;
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required uint32 ino = 2;
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required uint32 type = 3 [(criu).dict = "sk"];
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required uint32 state = 4 [(criu).dict = "sk"];
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required uint32 flags = 5 [(criu).hex = true];
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required uint32 uflags = 6 [(criu).hex = true];
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required uint32 backlog = 7;
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required uint32 peer = 8;
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required fown_entry fown = 9;
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required sk_opts_entry opts = 10;
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/*
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* Abstract name may contain \0 at any point,
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* so we need to carry it as byte sequence...
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*/
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required bytes name = 11 [(criu).conv = "unix_name"];
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optional sk_shutdown shutdown = 12;
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optional file_perms_entry file_perms = 13;
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/*
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* Relative socket name may have prefix.
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*/
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optional string name_dir = 14;
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optional bool deleted = 15;
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optional uint32 ns_id = 16;
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optional sint32 mnt_id = 17 [default = -1];
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}
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