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Christian Brauner [Thu, 18 Feb 2021 15:26:16 +0000 (16:26 +0100)]

bpf: simplify bpf (device) program freeing

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 15:21:04 +0000 (16:21 +0100)]

bpf: make bpf_program_cgroup_attach() static

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 15:13:45 +0000 (16:13 +0100)]

bpf: prevent double-close

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 14:52:52 +0000 (15:52 +0100)]

cgroups: use close_equal() and free_equal()

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 14:52:35 +0000 (15:52 +0100)]

memory_utils: add close_equal() and free_equal()

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 14:39:17 +0000 (15:39 +0100)]

lxccontainer: fix reboot logging

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 13:50:03 +0000 (14:50 +0100)]

bpf: rework live device cgroup update

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 13:42:39 +0000 (14:42 +0100)]

compiler: fix fallthrough attribute

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 13:42:15 +0000 (14:42 +0100)]

bpf: fix return values in bpf_program_cgroup_attach()

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 12:35:03 +0000 (13:35 +0100)]

bpf: let bpf_list_add_device() take the device list directly

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 12:20:40 +0000 (13:20 +0100)]

bpf: add and use bpf_cgroup_devices_attach() helper

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 11:41:57 +0000 (12:41 +0100)]

cgroups: remove compile-time bpf support detection

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 11:29:50 +0000 (12:29 +0100)]

bpf: vendor bpf headers

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 11:02:54 +0000 (12:02 +0100)]

bpf: handling missing defines

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 10:45:41 +0000 (11:45 +0100)]

bpf: rework bpf_program_cgroup_detach()

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 10:37:55 +0000 (11:37 +0100)]

commands: rework bpf devices BPF_F_REPLACE codepath

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 10:37:28 +0000 (11:37 +0100)]

bpf: don't close invalid fd, simply swap

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 10:36:32 +0000 (11:36 +0100)]

bpf: use __u32 not uint32_t

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 10:23:30 +0000 (11:23 +0100)]

macro: add swap helper

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 09:43:10 +0000 (10:43 +0100)]

commands: replace bpf program on update

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 09:41:52 +0000 (10:41 +0100)]

commands: improve bpf device program management

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 09:39:39 +0000 (10:39 +0100)]

cgroups: improve bpf device program management

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 09:39:14 +0000 (10:39 +0100)]

bpf: add helpers for better bpf device program management

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 09:24:10 +0000 (10:24 +0100)]

cgroups: improve bpf device program handling

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 09:23:29 +0000 (10:23 +0100)]

cgroups: make device cgroups semantics clearer

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 09:19:27 +0000 (10:19 +0100)]

bpf: enable helpers to let caller replace existing bpf programs

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 09:18:56 +0000 (10:18 +0100)]

bpf: align struct initialization

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 09:17:21 +0000 (10:17 +0100)]

bpf: use return macros

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Thu, 18 Feb 2021 09:15:39 +0000 (10:15 +0100)]

conf: introduce lxc_bpf_devices_rule_t type

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 23:51:14 +0000 (00:51 +0100)]

bpf: use cgroup fd directly instead of paths

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 23:38:47 +0000 (00:38 +0100)]

cgroups: kill monitor_full_path

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 23:35:22 +0000 (00:35 +0100)]

cgroups: free correct path

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 21:54:44 +0000 (22:54 +0100)]

utils: fix print_r() debugging helper

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 21:48:40 +0000 (22:48 +0100)]

cgroups: fix error values

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 17:49:20 +0000 (18:49 +0100)]

cgroups: don't overwrite type

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 15:59:40 +0000 (16:59 +0100)]

cgroups: make it extremely obvious that we're transitioning from a flag to a type

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Stéphane Graber [Wed, 17 Feb 2021 17:30:57 +0000 (12:30 -0500)]

Merge pull request #3680 from brauner/2021-02-17/cgroups_2

cgroups: fourth batch of cgroup fixes

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Christian Brauner [Wed, 17 Feb 2021 15:40:48 +0000 (16:40 +0100)]

cgroups: create controller directories if missing

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 15:28:42 +0000 (16:28 +0100)]

cgroups: use non-flag based checking now that we switched all codepaths over

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 15:24:50 +0000 (16:24 +0100)]

conf: use brackets to clarify check semantics

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 15:23:51 +0000 (16:23 +0100)]

cgroups: validate that only a single cgroup mount type is set

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 15:23:20 +0000 (16:23 +0100)]

cgroups: prevent cgroup mount type overwrite

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 15:29:56 +0000 (16:29 +0100)]

cgroups: ensure that cgroup_root is initialized in legacy codepaths

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 14:29:14 +0000 (15:29 +0100)]

cgroups: distinguish between tmpfs and unified based cgroup layouts file descriptors

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 14:24:23 +0000 (15:24 +0100)]

cgroups: log intermediate cleanup

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Stéphane Graber [Wed, 17 Feb 2021 13:59:13 +0000 (08:59 -0500)]

Merge pull request #3679 from brauner/2021-02-17/cgroups

cgroups: third batch of cgroup fixes

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Christian Brauner [Wed, 17 Feb 2021 13:36:10 +0000 (14:36 +0100)]

cgroups: prevent NULL pointer deref

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 09:45:35 +0000 (10:45 +0100)]

cgroups: simplify mount opening

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 09:35:58 +0000 (10:35 +0100)]

cgroups: ensure we prune the limit dir

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 09:30:30 +0000 (10:30 +0100)]

cgroups: ensure we don't remove cgroups we didn't create

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 09:08:27 +0000 (10:08 +0100)]

cgroups: don't move pivot cgroup under the monitor's cgroup

Otherwise we will never be able to destroy the monitor's cgroup.

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 09:06:29 +0000 (10:06 +0100)]

cgroups: don't rely on absolute path

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 09:04:58 +0000 (10:04 +0100)]

cgroups: be stricter when creating payloads

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 09:03:42 +0000 (10:03 +0100)]

cgroups: rework cgroup tree creation

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 08:28:46 +0000 (09:28 +0100)]

cgroups: ensure leaf cgroup is correctly pruned on creation failure

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 08:14:33 +0000 (09:14 +0100)]

cgroups: rework cgroup tree removal on creation failure

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 08:06:37 +0000 (09:06 +0100)]

cgroups: remove obsolote check

In the new layout we don't need to do this.

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 08:04:03 +0000 (09:04 +0100)]

cgroups: reorder function arguments

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Stéphane Graber [Wed, 17 Feb 2021 01:27:03 +0000 (20:27 -0500)]

Merge pull request #3678 from brauner/2021-02-17/unified_controller_delegation

cgroups: rework unified cgroup controller delegation

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Christian Brauner [Wed, 17 Feb 2021 00:43:51 +0000 (01:43 +0100)]

start: delegate than move into the target cgroup

This is a way more sensible model.

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 00:20:00 +0000 (01:20 +0100)]

cgroups: rework unified controller delegation

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 00:10:27 +0000 (01:10 +0100)]

cgroups: check correct variable

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Wed, 17 Feb 2021 00:05:09 +0000 (01:05 +0100)]

cgroups: s/openat()/open_at()/g

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Stéphane Graber [Wed, 17 Feb 2021 00:16:38 +0000 (19:16 -0500)]

Merge pull request #3677 from brauner/2021-02-17/cgroup_pruning

cgroups: fd-only cgroup tree pruning

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Stéphane Graber [Wed, 17 Feb 2021 00:16:23 +0000 (19:16 -0500)]

Merge pull request #3676 from brauner/2021-02-16/fixes

cgroups: fixes

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Christian Brauner [Tue, 16 Feb 2021 23:49:41 +0000 (00:49 +0100)]

cgroups: remove obsolote cgroup_tree handling

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Tue, 16 Feb 2021 22:05:23 +0000 (23:05 +0100)]

cgroups: fd-only cgroup tree pruning

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

commit | commitdiff | tree

Christian Brauner [Tue, 16 Feb 2021 19:53:16 +0000 (20:53 +0100)]

file_utils: move dup_cloexec() to header

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Tue, 16 Feb 2021 22:18:45 +0000 (23:18 +0100)]

cgroups: prevent double-close

Fixes: Coverity 1473183
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Tue, 16 Feb 2021 22:06:40 +0000 (23:06 +0100)]

namespace: add missing \0 terminator

Link: https://launchpadlibrarian.net/523195972/buildlog_ubuntu-groovy-ppc64el.lxc_1%3A4.0.6+master~20210215-1740-0ubuntu1~groovy_BUILDING.txt.gz
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Stéphane Graber [Tue, 16 Feb 2021 21:37:42 +0000 (16:37 -0500)]

Merge pull request #3675 from brauner/2021-02-16/fixes

cgroups: second batch of cgroup fixes

commit | commitdiff | tree

Christian Brauner [Tue, 16 Feb 2021 17:43:28 +0000 (18:43 +0100)]

cgroups: rework how hierarchies are added

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

commit | commitdiff | tree

Christian Brauner [Tue, 16 Feb 2021 17:38:26 +0000 (18:38 +0100)]

cgroups: fix fd leaks

They didn't really matter because we want to keep them around for as long as
the container lives anyway.

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Tue, 16 Feb 2021 16:56:31 +0000 (17:56 +0100)]

cgroups: allow "" base cgroup paths

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Tue, 16 Feb 2021 16:51:57 +0000 (17:51 +0100)]

string_utils: handle empty strings in must_make_path()

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

commit | commitdiff | tree

Christian Brauner [Tue, 16 Feb 2021 16:47:27 +0000 (17:47 +0100)]

cgroups: improve logging

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Tue, 16 Feb 2021 16:08:15 +0000 (17:08 +0100)]

cgroups: rework legacy cpuset handling

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Tue, 16 Feb 2021 14:32:16 +0000 (15:32 +0100)]

cgroups: fd-based only cgroup creation

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Tue, 16 Feb 2021 12:36:13 +0000 (13:36 +0100)]

cgroups: stash fds for the controller mountpoint and base cgroup path

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Tue, 16 Feb 2021 12:28:48 +0000 (13:28 +0100)]

cgroups: fail when no cgroup hierarchies are found

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Tue, 16 Feb 2021 12:25:26 +0000 (13:25 +0100)]

cgroups: rework base cgroup parsing

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Tue, 16 Feb 2021 10:46:36 +0000 (11:46 +0100)]

cgroups: rework add_hierarchy()

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Tue, 16 Feb 2021 10:35:43 +0000 (11:35 +0100)]

cgroups: better document stashed file descriptors

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Tue, 16 Feb 2021 10:22:56 +0000 (11:22 +0100)]

cgroups: stash host's cgroupfs file descriptor

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Tue, 16 Feb 2021 09:55:38 +0000 (10:55 +0100)]

cgroups: s/cg_init()/__cgroup_init()/g

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Stéphane Graber [Mon, 15 Feb 2021 17:56:52 +0000 (12:56 -0500)]

Merge pull request #3674 from brauner/2021-02-15/nesting

cgroups: tighten cgroup config items

commit | commitdiff | tree

Christian Brauner [Mon, 15 Feb 2021 16:02:55 +0000 (17:02 +0100)]

confile: forbid absolute paths in config items that modify the cgroup layout

This is not a safety measure but merely is supposed to raise awareness that
these paths are always relative to the cgroup root as determined by
lxc.cgroup.relative.

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Mon, 15 Feb 2021 15:49:09 +0000 (16:49 +0100)]

confile: forbid walking upwards for confile items that modify cgroup layout

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

commit | commitdiff | tree

Christian Brauner [Mon, 15 Feb 2021 16:53:58 +0000 (17:53 +0100)]

confile_utils: normalize paths in config items

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

commit | commitdiff | tree

Christian Brauner [Mon, 15 Feb 2021 15:36:39 +0000 (16:36 +0100)]

confile: use set_config_path_item() for most cgroup layout modifiers

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

commit | commitdiff | tree

Stéphane Graber [Mon, 15 Feb 2021 17:08:01 +0000 (12:08 -0500)]

Merge pull request #3673 from brauner/2021-02-15/nesting

cgroups: first batch of cgroup mounting fixes

commit | commitdiff | tree

Christian Brauner [Mon, 15 Feb 2021 14:07:02 +0000 (15:07 +0100)]

cgroupfs: rework cgroup2 mounting

We now explicitly refuse to mount cgroups on pure unified layouts when the
container is not running in a separate cgroup namespace. This is not a
regression since we simply always failed before anyway. I will likely fix this
very soon though. But there are bigger fish to fry currently.

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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Christian Brauner [Mon, 15 Feb 2021 12:58:10 +0000 (13:58 +0100)]

cgroups: log early return

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

commit | commitdiff | tree

Christian Brauner [Mon, 15 Feb 2021 12:54:51 +0000 (13:54 +0100)]

cgroups: s/__cg_mount_direct()/__cgroupfs_mount()/g

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

commit | commitdiff | tree

Christian Brauner [Mon, 15 Feb 2021 12:54:10 +0000 (13:54 +0100)]

cgroups: strip LXC_AUTO_CGROUP_MIXED and LXC_AUTO_CGROUP_FULL_MIXED when cgroup namespaces are supported and used

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

commit | commitdiff | tree

Christian Brauner [Mon, 15 Feb 2021 12:45:45 +0000 (13:45 +0100)]

cgroups: fix flag checking in legacy mount paths

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

commit | commitdiff | tree

Christian Brauner [Mon, 15 Feb 2021 12:44:24 +0000 (13:44 +0100)]

cgroups: s/cg_mount_cgroup_full()/cgroupfs_bind_mount()/g

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

commit | commitdiff | tree

Christian Brauner [Mon, 15 Feb 2021 12:42:40 +0000 (13:42 +0100)]

cgroups: s/cg_mount_in_cgroup_namespace()/cgroupfs_mount()/g

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

commit | commitdiff | tree

Christian Brauner [Mon, 15 Feb 2021 12:41:02 +0000 (13:41 +0100)]

conf: remove wrong comment

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

commit | commitdiff | tree

Christian Brauner [Mon, 15 Feb 2021 12:36:49 +0000 (13:36 +0100)]

cgroups: switch to flag-based checking

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>