[CRIU] [PATCH v2 20/36] proto: Add ns_hookup_entry description

[Andrei Vagin]

On Fri, Feb 03, 2017 at 07:14:34PM +0300, Kirill Tkhai wrote:
> New image format, generic for all namespaces.
> Currently, it's for pid, net and user ns.
> 
> Signed-off-by: Kirill Tkhai <ktkhai at virtuozzo.com>
> ---
>  criu/image-desc.c            |    1 +
>  criu/include/image-desc.h    |    1 +
>  criu/include/magic.h         |    1 +
>  criu/include/protobuf-desc.h |    1 +
>  criu/protobuf-desc.c         |    1 +
>  images/ns.proto              |   18 ++++++++++++++++++
>  lib/py/images/images.py      |    1 +
>  7 files changed, 24 insertions(+)
> 
> diff --git a/criu/image-desc.c b/criu/image-desc.c
> index bac7ca276..76419ebc8 100644
> --- a/criu/image-desc.c
> +++ b/criu/image-desc.c
> @@ -99,6 +99,7 @@ struct cr_fd_desc_tmpl imgset_template[CR_FD_MAX] = {
>  	FD_ENTRY(USERNS,	"userns-%d"),
>  	FD_ENTRY(NETNF_CT,	"netns-ct-%d"),
>  	FD_ENTRY(NETNF_EXP,	"netns-exp-%d"),
> +	FD_ENTRY(NS_HOOKUP,	"ns-hookup"),
>  
>  	[CR_FD_STATS] = {
>  		.fmt	= "stats-%s",
> diff --git a/criu/include/image-desc.h b/criu/include/image-desc.h
> index 09d187d22..16d0183ff 100644
> --- a/criu/include/image-desc.h
> +++ b/criu/include/image-desc.h
> @@ -107,6 +107,7 @@ enum {
>  	CR_FD_EVENTPOLL_TFD,
>  
>  	CR_FD_AUTOFS,
> +	CR_FD_NS_HOOKUP,
>  
>  	CR_FD_MAX
>  };
> diff --git a/criu/include/magic.h b/criu/include/magic.h
> index deb54b1d0..34e766fa3 100644
> --- a/criu/include/magic.h
> +++ b/criu/include/magic.h
> @@ -93,6 +93,7 @@
>  #define SECCOMP_MAGIC		0x64413049 /* Kostomuksha */
>  #define BINFMT_MISC_MAGIC	0x67343323 /* Apatity */
>  #define AUTOFS_MAGIC		0x49353943 /* Sochi */
> +#define NS_HOOKUP_MAGIC		0x55523343 /* Dnepropetrovsk */
>  
>  #define IFADDR_MAGIC		RAW_IMAGE_MAGIC
>  #define ROUTE_MAGIC		RAW_IMAGE_MAGIC
> diff --git a/criu/include/protobuf-desc.h b/criu/include/protobuf-desc.h
> index 6c76b494f..e45700b3d 100644
> --- a/criu/include/protobuf-desc.h
> +++ b/criu/include/protobuf-desc.h
> @@ -70,6 +70,7 @@ enum {
>  	PB_SK_QUEUES,
>  	PB_IPCNS_MSG,
>  	PB_IPCNS_MSG_ENT,
> +	PB_NS_HOOKUP,
>  
>  	PB_MAX,
>  };
> diff --git a/criu/protobuf-desc.c b/criu/protobuf-desc.c
> index 05f3eb386..f3361ff5f 100644
> --- a/criu/protobuf-desc.c
> +++ b/criu/protobuf-desc.c
> @@ -97,6 +97,7 @@ void cr_pb_init(void)
>  	CR_PB_DESC(REMAP_FPATH,		RemapFilePath,	remap_file_path);
>  	CR_PB_DESC(NETDEV,		NetDevice,	net_device);
>  	CR_PB_MDESC_INIT(cr_pb_descs[PB_PAGEMAP_HEAD],	PagemapHead,	pagemap_head);
> +	CR_PB_DESC(NS_HOOKUP,		NsHookup,	ns_hookup);
>  
>  #include "protobuf-desc-gen.h"
>  }
> diff --git a/images/ns.proto b/images/ns.proto
> index 7f7b09094..0f6a0b89d 100644
> --- a/images/ns.proto
> +++ b/images/ns.proto
> @@ -17,3 +17,21 @@ message userns_entry {
>  	repeated uid_gid_extent uid_map		= 1;
>  	repeated uid_gid_extent gid_map 	= 2;
>  }
> +
> +message pidns_entry {
> +	required uint32	userns_id		= 1;
> +}
> +
> +message netns_entry2 {
> +	required uint32	userns_id		= 1;
> +}
> +
> +message ns_hookup_entry {
> +	required uint32		id		= 1;
> +	required uint32		ns_cflag	= 2;
> +	optional uint32		parent_id	= 3;
> +
> +	optional userns_entry	user_ext	= 4;
> +	optional pidns_entry	pid_ext		= 5;
> +	optional netns_entry2	net_ext		= 6;

Maybe it is better to have separate object to describe each namespaces
and has the userns_id field on it? If we move all namespace entries to
ns_hookup_entry, it will be too fat. For example, you can look at
netns_entry, it is really big.

> +}
> diff --git a/lib/py/images/images.py b/lib/py/images/images.py
> index c593a3b85..69f813c40 100644
> --- a/lib/py/images/images.py
> +++ b/lib/py/images/images.py
> @@ -454,6 +454,7 @@ handlers = {
>  	'USERNS'		: entry_handler(userns_entry),
>  	'SECCOMP'		: entry_handler(seccomp_entry),
>  	'AUTOFS'		: entry_handler(autofs_entry),
> +	'NS_HOOKUP'	        : entry_handler(ns_hookup_entry),
>  	}
>  
>  def __rhandler(f):
> 
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