Will be used for single-entry images.
Signed-off-by: Stanislav Kinsbursky <skinsbursky@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Otherwise we might not unmap the whole stack leaving
a guard page in restoree memory map. Not a big deal
but anyway.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This is the first release of the tool! :)
Supported features:
* x86_64 architecture
* process' linkage
* process groups and sessions (without ttys though :\ )
* memory mappings of any kind (shared, file, etc.)
* threads
* open files (shared between tasks and partially opened-and-unlinked)
* pipes and fifos with data
* unix sockets with packet queues contents
* TCP and UDP sockets (TCP connections support exists, but needs polishing)
* inotifies, eventpoll and eventfd
* tasks' sigactions setup, credentials and itimers
* IPC, mount and PID namespaces
Most of the above works with kernel v3.5!
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
All options are described below, only main arguments
should be there.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Otherwise crtools built with stack executable, in result
kernel sets up
current->personality |= READ_IMPLIES_EXEC;
when our crtools get loaded into memory and mmap
calls in restorer create VMAs with EXEC bit set.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This requires some exlanations
- Since we use protobuf data in restorer
code we need to carry a copy of appropriate
PB entities in resident memory. For this
sake task_restore_core_args and thread_restore_args
were significantly reworked. In short -- the caller
code fills PB structures into task arguments space.
v3:
- Combine everything arch related to thread_info field,
and make it optional
- Drop "version" field from message, we check version in
another specific message
- Don't forget to call core_entry__free_unpacked where needed
- We continue dumping FPU state, still it's not yet restored
v4:
- Don't carry task_core_entry and task_kobs_ids_entry for
threads, and yield error if present in image.
v5:
- Allocate core_entry depending on type of task being dumped
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
We haven't tested it for several monthes and there's no evidence
it is required at all. For dumping a single task -t option works
just fine.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Currently we store the images version in the core file. This is
bad, since core file describes a single process (or thread) and
says nothing about the images set as a whole (let alone the fact
that it's being parsed too late).
Thus introduce the inventory image file which describes the image
set the way we need (want). For now the only entry in it is the
images version. In the future it can be extended.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Do not presume that the argv[1] is action. Use the optind index at the end
of parsing instead. This allows to specify --help option properly.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Otherwise it look strange when nothing to compile and make says that target
"all" doesn't require to be rebuild.
Signed-off-by: Stanislav Kinsbursky <skinsbursky@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
v2:
- Use regular uint types in message proto
- Use PB engine for "show"
v3:
- drop usage of temp. variable in prepare_shmem_pid
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This types specifies a strict set of what is hidden behind
the fd. Thus these numbers should be in the description of
the fdinfo message.
Plus protobuf makes shure nothing else will be there.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Try hard to find the symbolic (declared in .proto file) name
for the given value.
Will use enums in fdinfo, thus prepare.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
We've switched to SkOptsEntry, no need to carry this
obsolete one.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
We are ready to use FownEntry everywhere,
so drop fown_t type and clean up source code.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This patch prepares the ground for further patches.
sk_opts_entry get converted to PB format but not
yet used anywhere in code. Also a few additional
pb_ helpers are added.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This one walks the 'plain' image file, i.e. the one with straignt <magi>[<size><entry>]*
format, and prints each message. Saves lots of lines of code.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
