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Kirill Tkhai 26162cac37 pie: Optimize send_fds() and recv_fds() with opts
Do not ask kernel to transfer more opts than we really need.

When we're sending fds with flags, we ask kernel to copy the whole
struct scm_fdset::opts array, like we'd send CR_SCM_MAX_FD fds,
even if really we're transmitting only one fd.
send_fds() does not initializes the rest of array memory, but kernel
transmits this garbage. Also, recv_msg() does not return it to userspace.

This patch makes kernel do not transmit uninitialized garbage.

travis-ci: success for pie: Optimize send_fds() and recv_fds() with opts
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
2016-11-03 20:49:16 +03:00
contrib Add script to install required packages to compile in Debian 2016-09-26 15:42:43 +03:00
coredump coredump: Rename dir to coredump 2016-06-28 13:04:58 +03:00
crit crit/decode: set default opts['nopl'] to False 2016-05-30 13:47:54 +03:00
criu pie: Optimize send_fds() and recv_fds() with opts 2016-11-03 20:49:16 +03:00
Documentation criu(8): describe --external option 2016-11-03 18:17:15 +03:00
images images: add syntax declaration to macvlan.proto 2016-11-03 18:15:02 +03:00
include/common ppc asm/bitops.h: fix for clang 2016-11-03 01:32:55 +03:00
lib lib: add inherit_fd 2016-10-24 16:00:15 +03:00
scripts make: Add .config file processing (v3) 2016-11-03 20:49:13 +03:00
test zdtm: check read-only tmpfs in userns 2016-11-03 20:47:41 +03:00
.gitignore make: Add .config file processing (v3) 2016-11-03 20:49:13 +03:00
.mailmap repo: Add mailmap file 2012-03-25 23:31:20 +04:00
.travis.yml travis.yml: fix GCOV setting 2016-11-02 20:35:56 +03:00
COPYING COPYING: fix a typo in a preamble 2016-08-11 16:18:43 +03:00
CREDITS Add the CREDITS file 2012-07-30 13:52:37 +04:00
INSTALL.md build: Add INSTALL.md and update "make help" 2016-05-06 14:38:29 +03:00
Makefile make: Add dependency on config header for criu/* 2016-11-03 09:21:04 +03:00
Makefile.config make: Add .config file processing (v3) 2016-11-03 20:49:13 +03:00
Makefile.install build/make: return to make from top directory 2016-08-01 18:38:32 +03:00
Makefile.versions criu: Version 2.7 2016-10-17 11:30:31 +03:00
README.md Add ascciinema tour on basic criu features. 2016-06-16 16:37:06 +03:00

CRIU (Checkpoint and Restore in Userspace)

An utility to checkpoint/restore tasks. Using this tool, you can freeze a running application (or part of it) and checkpoint it to a hard drive as a collection of files. You can then use the files to restore and run the application from the point it was frozen at. The distinctive feature of the CRIU project is that it is mainly implemented in user space.

The project home is at http://criu.org.

Pages worth starting with are:

A video tour on basic CRIU features

CRIU introduction

How to contribute