Function defaultPath always parses /proc/self/cgroup, but
the resulting value is not always used.
Avoid unnecessary reading/parsing by moving the code
to just before its use.
Modify the test case accordingly.
[v2: test: use UnifiedMountpoint, skip test if not on v2]
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
I realised that the terminal documentation which covers detached
terminals fails to mention that callers need to make themselves a
subreaper. Probably a good idea to mention this. I've also included a
minor comparison to LXC.
Signed-off-by: Aleksa Sarai <asarai@suse.de>
RELEASE_DIR is only used once, so it doesn't make sense to have it.
SHELL was introduced in commit 54390f89a7 and was used
implicitly (since Makefile contained some bash-specific code),
but is no longer needed since commit ed68ee1e10.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Target `install-man` was not dependent on `man`, meaning no man pages
were installed unless one called `make man` beforehand. Fix this.
Remove many man-related variables, only leaving MANDIR, which is
an installation directory for man pages.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
These targets are not very reliable and, depending on environment
variables, migth result in data loss. For example:
make DESTDIR=`pwd`/tmp install
...
make uninstall
The first make command will install $CURDIR/tmp/usr/local/bin/runc,
while the last command will remove /usr/local/bin/runc.
One way to support uninstall would be to write a temp file during
installation, which would contain the files we have installed.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Otherwise, in case go < 1.14 is used, all the go deps are downloaded
instead of using vendor subdir.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
This fixes the following bug:
> $ GO111MODULE=off make
> go build "-mod=vendor" -buildmode=pie -tags "seccomp selinux apparmor" -ldflags "-X main.gitCommit="19ba7688cb4e0922d53029e2f7c1f2af45d40938-dirty" -X main.version=1.0.0-rc10+dev " -o runc .
> build flag -mod=vendor only valid when using modules
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Since go has its own way to track dependencies and rebuild if needed,
and it is efficient enough, let's drop using SOURCES variable, mark
all targets as PHONY and let golang do its job.
The primary motivation for this was concern about using find on every
make invocation to build the list of all sources.
Some unscientific performance analisys:
Before:
> $ time make
> make: 'runc' is up to date.
>
> real 0m0.202s
> user 0m0.177s
> sys 0m0.031s
After:
> $ time make
> go build -mod=vendor -buildmode=pie -tags "seccomp selinux apparmor" -ldflags "-X main.gitCommit="5a8210a58bd0f07cc987e6201b4174e5b93fa115" -X main.version=1.0.0-rc10+dev " -o runc .
>
> real 0m0.149s
> user 0m0.315s
> sys 0m0.106s
So, it is slightly faster using the wall clock, uses more CPU, but
we can be sure the binary is always up to date.
This also fixes the Makefile to mark all targets as PHONY. The list
was generated by `grep -E '^[a-z-]+:' Makefile | sed 's/:.*//'`.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
This was added by commit 993cbf9db but since some time ago (go 1.13
for sure, but may be earlier) is no longer needed since all the tools
are correctly skipping vendor subdir.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Since we already have to build everything and run integration tests
on the Vagrant Fedora 31 host (in order to test how runc talks to
systemd), let's do the same for unit tests (otherwise we build
everything twice).
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Since we carry vendor/ subdir, let's actually use it. Should speed up CI
a bit, possibly also making it a tad more stable.
This is actually implemented in go 1.14 already (i.e. it turns mod=vendor
automatically if it sees vendor/ dir), but we still use go 1.13.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
It's hard to read otherwise (at least for me).
While at it, replace ${FOO} with $(FOO) -- both are
identical, but the second style looks to be used more.
No functional change.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
There are way to many arguments to go build, and they are repeatedly
used across the makefile. Separate them out to GO_BUILD and
GO_BUILD_STATIC variables.
While at it, let's be consistem about the style and use $(FOO) everywhere
(there is no difference from ${FOO}).
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
To make a bind mount read-only, it needs to be remounted. This is what
the code removed does, but it is not needed here.
We have to deal with three cases here:
1. cgroup v2 unified mode. In this case the mount is real mount with
fstype=cgroup2, and there is no need to have a bind mount on top,
as we pass readonly flag to the mount as is.
2. cgroup v1 + cgroupns (enableCgroupns == true). In this case the
"mount" is in fact a set of real mounts with fstype=cgroup, and
they are all performed in mountCgroupV1, with readonly flag
added if needed.
3. cgroup v1 as is (enableCgroupns == false). In this case
mountCgroupV1() calls mountToRootfs() again with an argument
from the list obtained from getCgroupMounts(), i.e. a bind
mount with the same flags as the original mount has (plus
unix.MS_BIND | unix.MS_REC), and mountToRootfs() does remounting
(under the case "bind":).
So, the code which this patch is removing is not needed -- it
essentially does nothing in case 3 above (since the bind mount
is already remounted readonly), and in cases 1 and 2 it
creates an unneeded extra bind mount on top of a real one (or set of
real ones).
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
The bats testing framework we use for integration test is not maintained
since 2015 and was superceded by bats-core [1]. More to say, we were
using an unreleased version and relying on some features of it
(unfortunately I don't remember now what are those features exactly).
As Debian still packages very old version of bats from the old repo,
so let's Use recent bats-core from the new, supposedly better maintained,
github repo.
[1] https://github.com/sstephenson/bats/pull/269
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
With the fix in the previous commit and criu patched with support for
cgroupv2, these tests should now pass.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
In case of cgroupv2 unified hierarchy, the /sys/fs/cgroup mount
is the real mount with fstype of cgroup2 (rather than a set of
external bind mounts like for cgroupv1).
So, we should not add it to the list of "external bind mounts"
on both checkpoint and restore.
Without this fix, checkpoint integration tests fail on cgroup v2.
Also, same is true for cgroup v1 + cgroupns.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Same test as the first one, just with cgroupns enabled.
Since in case of cgroupv2 `runc spec` enables cgroupns,
this case was already tested by the first checkpoint test,
so skip it.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Commit a9e15e7e0 adds a check that stdin/out/err pipes
are restored correctly. Commit ec260653b7 copy/pastes
the same code to one more another test.
Problem is (as pointed out in commit 5369f9ade3) these tests
sometimes hang. I have also seen them fail.
Apparently, the code used to create pipes and open them to fds
is racy:
```shell
cat $fifo | cat $fifo &
pid=$!
exec 50</proc/$pid/fd/0
exec 51>/proc/$pid/fd/0
```
Since `cat | cat` is spawned asynchronously, by the time exec is used,
the second cat process (i.e. $pid) is already fork'ed but it might
not be exec'ed yet. As a result, we get this (`ls -l /proc/self/fd`):
```
lr-x------. 1 root root 64 Apr 20 02:39 50 -> /dev/pts/1
l-wx------. 1 root root 64 Apr 20 02:39 51 -> /dev/pts/1
```
or, in some cases:
```
lr-x------. 1 root root 64 Apr 20 02:45 50 -> /dev/pts/1
l-wx------. 1 root root 64 Apr 20 02:45 51 -> 'pipe:[215791]'
```
instead of expected set of pipes:
```
> lr-x------. 1 root root 64 Apr 20 02:45 50 -> 'pipe:[215791]'
> l-wx------. 1 root root 64 Apr 20 02:45 51 -> 'pipe:[215791]'
```
One possible workaround is to add `sleep 0.1` or so after cat|cat,
but it is outright ugly (besides, we already have one sleep in
the test code).
The solution is to not use any external processes to create pipes.
I admit this still looks not very comprehensible, but at least it
is easier than before, and it works.
While at it, remove code duplication, moving the setup and check
code into a pair of functions.
Finally, since the tests are working now, remove the skip.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Ted Yu
Mrunal Patel
Kir Kolyshkin
Akihiro Suda
Aleksa Sarai
lifubang
Kir Kolyshkin
Kenta Tada