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Fix bpf compilation on redhat and centos with kernel 4.18 #351

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merged 1 commit into from
Dec 9, 2020
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Fix bpf compilation on redhat and centos with kernel 4.18 #351

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12 changes: 9 additions & 3 deletions tracee/tracee.bpf.c
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Original file line number Diff line number Diff line change
Expand Up @@ -156,6 +156,12 @@ BPF_MAP(_name, BPF_MAP_TYPE_PROG_ARRAY, u32, u32, _max_entries);
#define BPF_PERF_OUTPUT(_name) \
BPF_MAP(_name, BPF_MAP_TYPE_PERF_EVENT_ARRAY, int, __u32, 1024);

#ifdef RHEL_RELEASE_CODE
#if (RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(8, 0))
#define RHEL_RELEASE_GT_8_0
#endif
#endif

#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 14, 0)
#error Minimal required kernel version is 4.14
#endif
Expand Down Expand Up @@ -273,7 +279,7 @@ static __always_inline u32 get_task_ns_pid(struct task_struct *task)
{
unsigned int level = READ_KERN(READ_KERN(READ_KERN(task->nsproxy)->pid_ns_for_children)->level);

#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 19, 0)
#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 19, 0) && !defined(RHEL_RELEASE_GT_8_0))
// kernel 4.14-4.18:
return READ_KERN(READ_KERN(task->pids[PIDTYPE_PID].pid)->numbers[level].nr);
#else
Expand All @@ -287,7 +293,7 @@ static __always_inline u32 get_task_ns_tgid(struct task_struct *task)
unsigned int level = READ_KERN(READ_KERN(READ_KERN(task->nsproxy)->pid_ns_for_children)->level);
struct task_struct *group_leader = READ_KERN(task->group_leader);

#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 19, 0)
#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 19, 0) && !defined(RHEL_RELEASE_GT_8_0))
// kernel 4.14-4.18:
return READ_KERN(READ_KERN(group_leader->pids[PIDTYPE_PID].pid)->numbers[level].nr);
#else
Expand All @@ -301,7 +307,7 @@ static __always_inline u32 get_task_ns_ppid(struct task_struct *task)
struct task_struct *real_parent = READ_KERN(task->real_parent);
unsigned int level = READ_KERN(READ_KERN(READ_KERN(real_parent->nsproxy)->pid_ns_for_children)->level);

#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 19, 0)
#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 19, 0) && !defined(RHEL_RELEASE_GT_8_0))
// kernel 4.14-4.18:
return READ_KERN(READ_KERN(real_parent->pids[PIDTYPE_PID].pid)->numbers[level].nr);
#else
Expand Down