Context |
Check |
Description |
bpf/vmtest-bpf-next-VM_Test-0 |
success
|
Logs for Lint
|
bpf/vmtest-bpf-next-VM_Test-1 |
success
|
Logs for ShellCheck
|
bpf/vmtest-bpf-next-VM_Test-2 |
success
|
Logs for Unittests
|
bpf/vmtest-bpf-next-VM_Test-3 |
success
|
Logs for Validate matrix.py
|
bpf/vmtest-bpf-next-VM_Test-5 |
success
|
Logs for aarch64-gcc / build-release
|
bpf/vmtest-bpf-next-VM_Test-33 |
success
|
Logs for x86_64-llvm-17 / test (test_verifier, false, 360) / test_verifier on x86_64 with llvm-17
|
bpf/vmtest-bpf-next-VM_Test-34 |
success
|
Logs for x86_64-llvm-17 / veristat
|
bpf/vmtest-bpf-next-VM_Test-4 |
success
|
Logs for aarch64-gcc / build / build for aarch64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-35 |
success
|
Logs for x86_64-llvm-18 / build / build for x86_64 with llvm-18
|
bpf/vmtest-bpf-next-VM_Test-10 |
success
|
Logs for aarch64-gcc / veristat
|
bpf/vmtest-bpf-next-VM_Test-11 |
success
|
Logs for s390x-gcc / build / build for s390x with gcc
|
bpf/vmtest-bpf-next-VM_Test-19 |
success
|
Logs for x86_64-gcc / build / build for x86_64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-30 |
success
|
Logs for x86_64-llvm-17 / test (test_maps, false, 360) / test_maps on x86_64 with llvm-17
|
bpf/vmtest-bpf-next-VM_Test-9 |
success
|
Logs for aarch64-gcc / test (test_verifier, false, 360) / test_verifier on aarch64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-22 |
fail
|
Logs for x86_64-gcc / test (test_progs, false, 360) / test_progs on x86_64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-12 |
success
|
Logs for s390x-gcc / build-release
|
bpf/vmtest-bpf-next-VM_Test-17 |
success
|
Logs for s390x-gcc / veristat
|
bpf/vmtest-bpf-next-VM_Test-27 |
success
|
Logs for x86_64-gcc / veristat / veristat on x86_64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-21 |
success
|
Logs for x86_64-gcc / test (test_maps, false, 360) / test_maps on x86_64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-20 |
success
|
Logs for x86_64-gcc / build-release
|
bpf/vmtest-bpf-next-VM_Test-23 |
fail
|
Logs for x86_64-gcc / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on x86_64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-25 |
success
|
Logs for x86_64-gcc / test (test_progs_parallel, true, 30) / test_progs_parallel on x86_64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-28 |
success
|
Logs for x86_64-llvm-17 / build / build for x86_64 with llvm-17
|
bpf/vmtest-bpf-next-VM_Test-24 |
success
|
Logs for x86_64-gcc / test (test_progs_no_alu32_parallel, true, 30) / test_progs_no_alu32_parallel on x86_64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-37 |
success
|
Logs for x86_64-llvm-18 / test (test_maps, false, 360) / test_maps on x86_64 with llvm-18
|
bpf/vmtest-bpf-next-VM_Test-26 |
success
|
Logs for x86_64-gcc / test (test_verifier, false, 360) / test_verifier on x86_64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-18 |
success
|
Logs for set-matrix
|
bpf/vmtest-bpf-next-VM_Test-41 |
success
|
Logs for x86_64-llvm-18 / test (test_verifier, false, 360) / test_verifier on x86_64 with llvm-18
|
bpf/vmtest-bpf-next-VM_Test-42 |
success
|
Logs for x86_64-llvm-18 / veristat
|
bpf/vmtest-bpf-next-VM_Test-32 |
fail
|
Logs for x86_64-llvm-17 / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on x86_64 with llvm-17
|
bpf/vmtest-bpf-next-VM_Test-31 |
fail
|
Logs for x86_64-llvm-17 / test (test_progs, false, 360) / test_progs on x86_64 with llvm-17
|
bpf/vmtest-bpf-next-VM_Test-7 |
fail
|
Logs for aarch64-gcc / test (test_progs, false, 360) / test_progs on aarch64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-6 |
success
|
Logs for aarch64-gcc / test (test_maps, false, 360) / test_maps on aarch64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-8 |
fail
|
Logs for aarch64-gcc / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on aarch64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-13 |
success
|
Logs for s390x-gcc / test (test_maps, false, 360) / test_maps on s390x with gcc
|
bpf/vmtest-bpf-next-VM_Test-36 |
success
|
Logs for x86_64-llvm-18 / build-release / build for x86_64 with llvm-18 and -O2 optimization
|
bpf/vmtest-bpf-next-VM_Test-38 |
fail
|
Logs for x86_64-llvm-18 / test (test_progs, false, 360) / test_progs on x86_64 with llvm-18
|
bpf/vmtest-bpf-next-VM_Test-39 |
fail
|
Logs for x86_64-llvm-18 / test (test_progs_cpuv4, false, 360) / test_progs_cpuv4 on x86_64 with llvm-18
|
bpf/vmtest-bpf-next-VM_Test-40 |
fail
|
Logs for x86_64-llvm-18 / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on x86_64 with llvm-18
|
bpf/vmtest-bpf-next-VM_Test-16 |
fail
|
Logs for s390x-gcc / test (test_verifier, false, 360) / test_verifier on s390x with gcc
|
bpf/vmtest-bpf-next-VM_Test-29 |
success
|
Logs for x86_64-llvm-17 / build-release / build for x86_64 with llvm-17 and -O2 optimization
|
bpf/vmtest-bpf-next-PR |
fail
|
PR summary
|
bpf/vmtest-bpf-next-VM_Test-15 |
fail
|
Logs for s390x-gcc / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on s390x with gcc
|
bpf/vmtest-bpf-next-VM_Test-14 |
fail
|
Logs for s390x-gcc / test (test_progs, false, 360) / test_progs on s390x with gcc
|
netdev/series_format |
warning
|
Series does not have a cover letter
|
netdev/tree_selection |
success
|
Clearly marked for bpf-next
|
netdev/ynl |
success
|
Generated files up to date;
no warnings/errors;
no diff in generated;
|
netdev/fixes_present |
success
|
Fixes tag not required for -next series
|
netdev/header_inline |
success
|
No static functions without inline keyword in header files
|
netdev/build_32bit |
fail
|
Errors and warnings before: 990 this patch: 991
|
netdev/build_tools |
success
|
No tools touched, skip
|
netdev/cc_maintainers |
success
|
CCed 13 of 13 maintainers
|
netdev/build_clang |
success
|
Errors and warnings before: 956 this patch: 956
|
netdev/verify_signedoff |
success
|
Signed-off-by tag matches author and committer
|
netdev/deprecated_api |
success
|
None detected
|
netdev/check_selftest |
success
|
No net selftest shell script
|
netdev/verify_fixes |
success
|
No Fixes tag
|
netdev/build_allmodconfig_warn |
fail
|
Errors and warnings before: 1001 this patch: 1002
|
netdev/checkpatch |
warning
|
WARNING: line length of 82 exceeds 80 columns
|
netdev/build_clang_rust |
success
|
No Rust files in patch. Skipping build
|
netdev/kdoc |
success
|
Errors and warnings before: 0 this patch: 0
|
netdev/source_inline |
success
|
Was 0 now: 0
|
@@ -2270,6 +2270,36 @@ bpf_task_get_cgroup1(struct task_struct *task, int hierarchy_id)
return NULL;
return cgrp;
}
+
+/**
+ * bpf_task_freeze_cgroup - Freeze the task cgroup and all its descendant cgroups.
+ *
+ * @task: The target task
+ * @freeze: freeze state, passing value 1 causes the freezing of the cgroup
+ * and all descendant cgroups. Processes under this cgroup hierarchy will
+ * be stopped and will not run until the cgroup is explicitly unfrozen.
+ * Passing value 0 unthaws the task cgroup and its descendant cgroups.
+ *
+ * Return: %0 on success or a negative errno code on failure.
+ */
+__bpf_kfunc int bpf_task_freeze_cgroup(struct task_struct *task, int freeze)
+{
+ int ret;
+ struct cgroup *cgrp;
+
+ rcu_read_lock();
+ cgrp = task_dfl_cgroup(task);
+ if (!cgrp || !cgroup_tryget(cgrp)) {
+ rcu_read_unlock();
+ return -ENOENT;
+ }
+ rcu_read_unlock();
+
+ ret = cgroup_freeze_no_kn(cgrp, freeze);
+ cgroup_put(cgrp);
+
+ return ret;
+}
#endif /* CONFIG_CGROUPS */
/**
@@ -2577,6 +2607,7 @@ BTF_ID_FLAGS(func, bpf_cgroup_ancestor, KF_ACQUIRE | KF_RCU | KF_RET_NULL)
BTF_ID_FLAGS(func, bpf_cgroup_from_id, KF_ACQUIRE | KF_RET_NULL)
BTF_ID_FLAGS(func, bpf_task_under_cgroup, KF_RCU)
BTF_ID_FLAGS(func, bpf_task_get_cgroup1, KF_ACQUIRE | KF_RCU | KF_RET_NULL)
+BTF_ID_FLAGS(func, bpf_task_freeze_cgroup, KF_TRUSTED_ARGS | KF_SLEEPABLE)
#endif
BTF_ID_FLAGS(func, bpf_task_from_pid, KF_ACQUIRE | KF_RET_NULL)
BTF_ID_FLAGS(func, bpf_throw)
This patch adds a new bpf helper bpf_task_freeze_cgroup() to freeze a cgroup of a task and all its descendant cgroups. It requires the task to be on the default cgroup v2 hierarchy. For some cases we want to freeze the cgroup of a task based on some signals, doing so from bpf is better than user space which could be too late. Planned users of this feature are: tetragon and systemd when freezing a cgroup hierarchy that could be a K8s pod, container, system service or a user session. This helper will acquire the cgroup_mutex during its operation and release it before it returns. Signed-off-by: Djalal Harouni <tixxdz@gmail.com> --- kernel/bpf/helpers.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+)