mount: add btrfs into fstypes

It's used by phys_stat_resolve_dev (broken by c5d2386a)

Signed-off-by: Andrew Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
mount: Fixup phys/virt devices dumping for ghost files

When dumping a ghost file we put real device in its header,
not the (btrfs) virtual one. This is done since we put real
devices into fsnotify images (we get them from proc). That
said on fsnotify ghost restore we don't need to do path
resolution, just devices compare.

And one more thing. When dumping device for ghost file for
_non_ btrfs case we have to convert stat dev_t into kernel
dev_t as all the other places in criu manipulate the latter
ones.

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
unix: Move odev to kdev conversion into phys_stat_dev_match

This is more correct, as if st_dev == phys_dev check fails
we have to treat phys_dev as kdev for path resolve device
comparison.

Howver, this is not the case for non-btrfs FSs, and for the
latter one doesn't change anything as it uses anon devices
which are equal for kdev and odev cases.

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
systemd socket activation support

Makes the criu RPC socket socket-activated with
systemd [1], meaning that systemd will create and listen to
the UNIX socket /var/run/criu-srvice.socket
on behalf of criu until a connection comes in, when it will
then pass control of the socket, along with the first connection
over to a newly spawned criu daemon.

This is similar to inetd, but criu stays around after getting
started, listening itsself on the socket.

[1] http://0pointer.de/blog/projects/socket-activation.html

v2: stripped down sd-daemon.[ch]
    moved units to scripts/sd

v3: stripped down further by removing unneeded includes

Signed-off-by: Shawn Landden <shawn@churchofgit.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
whitespace-at-eol cleanup

Remove whitespace at EOL (found by git grep ' $')

To people using vim, I'd suggest adding the following code to ~/.vimrc:

let c_space_errors = 1
highlight FormatError ctermbg=darkred guibg=darkred
match FormatError /\s\+$\|\ \+\t\|\%80v.\|\ \{8\}/

Signed-off-by: Kir Kolyshkin <kir@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
space-before-tab whitespace cleanup

Remove space before tab characters.

Found by git grep ' 	' (Space, Ctrl-V, Tab in shell).

Signed-off-by: Kir Kolyshkin <kir@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
headers: Drop uintX_t usage

We have a mess of uintX_t and uX usage. Drop off uintX_t ones.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Andrew Vagin <avagin@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>