This patch prepares code to handle errors. In the near future
we will handle SIGCHLD. If a restore of one task fails, we will
send a signal to other for completing.
For this we should have ability to wait until all task wills be
restored. This patch does it.
v2: Don't wait children.
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
Sometime we want to have a shared mapping in restorer. E.g. A storage
for shared memory entries. This entries contains locks, which should
be released in restorer.
v2: fixed according to Pavel's comments
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
There is no need to use sys_ versions of libc functions
when we run in non relocated code. It's a leftover from
early testing time. Fix it.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
We allocate only one page for fdinfo_list_entries.
In the future we will be able to resize this memory.
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Yet again -- this makes code easier to understand from my POV.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Reprimand to commits bd8b2b0f and d0a6e9a1 authors for not
cleaning after themselves...
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
This one is skipped at restore and leaves an open core file
in target task's fdtable.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Otherwise it pops up after restore in target task's fdtable.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Make it shorter and simpler and use one in open_image_ro_nocheck.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
create_pipe() may restore up to 3 descriptors. They may be both ends
of pipes and a target descriptor. The image fd may hold any of them.
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
This reverts commit 46c613cc7d869ebf39532a1def054de7678e441f.
Andrey posted a proper fix for it. Moreover, the problem in first
place was initiated by a parasite application running during test
case, crtools knows nothing about.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
It's perfectly fine to reuse descriptors here,
since we use plain pipe() call and it migh choose
the descriptor which we need after.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Add the -l option to show the list of tests
Make the default zdtm/live/ prefix when running individual test
Now you can do it like
# sh ./zdtm.sh for running all tests
# sh ./zdtm.sh -l to list available tests
# sh ./zdtm.sh <test> to run test <test>, e.g. "static/pipe00"
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
This makes crtools correctly abort when working on wrong kernel.
Otherwise all the open files will have the same (garbage) ID and
the subsequent restore will result in broken app.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
The old code carried the path through the stack. Now we have
pstree_pid and handy helpers to get one.
Tested by pipes00 test from zdtm (it forks).
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
And do not use strcpy, better to stick with strncpy.
Moreover, to be on a safe side make proc internal
buffer big enough even for "(%16s)" format, it's
hardly possible that the kernel ever change stat
format but just to be on a safe side.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Instead of passing self-vma file path to restorer
code simply open it before restore_task call and
pass descriptor instead. This saves some memory.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
We will later need other fields of this file, so let's parse it right
now in a way, that allows to easily get new fields.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
* @xemul:
crtools: Collect dumping fd parameters into one place
crtools: Toss dump_one_fd args around
crtools: Rename fd to lfd in dump_one_fd
crtools: Sanitize pstree construction
crtools: Remove unused printk_registers and co
crtools: Deduplicate file info showing code
crtools: Merge pstree collecting into showing
crtools: Remove unused and wrong arrays from pstree image
crtools: Remove lseeks after prep_cr_ calls
crtools: Cleanup collect_pstree in cr-show
Conflicts:
cr-dump.c
include/sockets.h
sockets.c
The conflicts are mostly because of commit
995ef5eca3b8d74cf192e41c307f5329d93f9795
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
No need to track in a weird way. It's small structure.
Moreover, the rest of parasite code doesn't count for
space allocated _after_ the main control block. We simply
had happened to not hit any problems before.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
This allows us to get rid of open-coded "/proc/pid/X".
Based-on-patch-from: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
