diff options
Diffstat (limited to 'samples/bpf')
| -rw-r--r-- | samples/bpf/offwaketime.bpf.c | 18 | ||||
| -rw-r--r-- | samples/bpf/test_overhead_kprobe.bpf.c | 20 | ||||
| -rw-r--r-- | samples/bpf/tracex1.bpf.c | 17 | ||||
| -rw-r--r-- | samples/bpf/tracex5.bpf.c | 5 |
4 files changed, 20 insertions, 40 deletions
diff --git a/samples/bpf/offwaketime.bpf.c b/samples/bpf/offwaketime.bpf.c index 3200a0f44969..4a65ba76c1b1 100644 --- a/samples/bpf/offwaketime.bpf.c +++ b/samples/bpf/offwaketime.bpf.c @@ -8,18 +8,12 @@ #include <linux/version.h> #include <bpf/bpf_helpers.h> #include <bpf/bpf_tracing.h> +#include <bpf/bpf_core_read.h> #ifndef PERF_MAX_STACK_DEPTH #define PERF_MAX_STACK_DEPTH 127 #endif -#define _(P) \ - ({ \ - typeof(P) val; \ - bpf_probe_read_kernel(&val, sizeof(val), &(P)); \ - val; \ - }) - #define MINBLOCK_US 1 #define MAX_ENTRIES 10000 @@ -68,11 +62,9 @@ struct { SEC("kprobe/try_to_wake_up") int waker(struct pt_regs *ctx) { - struct task_struct *p = (void *) PT_REGS_PARM1(ctx); + struct task_struct *p = (void *)PT_REGS_PARM1_CORE(ctx); + u32 pid = BPF_CORE_READ(p, pid); struct wokeby_t woke; - u32 pid; - - pid = _(p->pid); bpf_get_current_comm(&woke.name, sizeof(woke.name)); woke.ret = bpf_get_stackid(ctx, &stackmap, STACKID_FLAGS); @@ -121,9 +113,9 @@ int oncpu(struct trace_event_raw_sched_switch *ctx) SEC("kprobe.multi/finish_task_switch*") int oncpu(struct pt_regs *ctx) { - struct task_struct *p = (void *) PT_REGS_PARM1(ctx); + struct task_struct *p = (void *)PT_REGS_PARM1_CORE(ctx); /* record previous thread sleep time */ - u32 pid = _(p->pid); + u32 pid = BPF_CORE_READ(p, pid); #endif u64 delta, ts, *tsp; diff --git a/samples/bpf/test_overhead_kprobe.bpf.c b/samples/bpf/test_overhead_kprobe.bpf.c index c3528731e0e1..668cf5259c60 100644 --- a/samples/bpf/test_overhead_kprobe.bpf.c +++ b/samples/bpf/test_overhead_kprobe.bpf.c @@ -8,13 +8,7 @@ #include <linux/version.h> #include <bpf/bpf_helpers.h> #include <bpf/bpf_tracing.h> - -#define _(P) \ - ({ \ - typeof(P) val = 0; \ - bpf_probe_read_kernel(&val, sizeof(val), &(P)); \ - val; \ - }) +#include <bpf/bpf_core_read.h> SEC("kprobe/__set_task_comm") int prog(struct pt_regs *ctx) @@ -26,14 +20,14 @@ int prog(struct pt_regs *ctx) u16 oom_score_adj; u32 pid; - tsk = (void *)PT_REGS_PARM1(ctx); + tsk = (void *)PT_REGS_PARM1_CORE(ctx); - pid = _(tsk->pid); - bpf_probe_read_kernel_str(oldcomm, sizeof(oldcomm), &tsk->comm); - bpf_probe_read_kernel_str(newcomm, sizeof(newcomm), + pid = BPF_CORE_READ(tsk, pid); + bpf_core_read_str(oldcomm, sizeof(oldcomm), &tsk->comm); + bpf_core_read_str(newcomm, sizeof(newcomm), (void *)PT_REGS_PARM2(ctx)); - signal = _(tsk->signal); - oom_score_adj = _(signal->oom_score_adj); + signal = BPF_CORE_READ(tsk, signal); + oom_score_adj = BPF_CORE_READ(signal, oom_score_adj); return 0; } diff --git a/samples/bpf/tracex1.bpf.c b/samples/bpf/tracex1.bpf.c index f3be14a03964..0ab39d76ff8f 100644 --- a/samples/bpf/tracex1.bpf.c +++ b/samples/bpf/tracex1.bpf.c @@ -8,15 +8,9 @@ #include "net_shared.h" #include <linux/version.h> #include <bpf/bpf_helpers.h> +#include <bpf/bpf_core_read.h> #include <bpf/bpf_tracing.h> -#define _(P) \ - ({ \ - typeof(P) val = 0; \ - bpf_probe_read_kernel(&val, sizeof(val), &(P)); \ - val; \ - }) - /* kprobe is NOT a stable ABI * kernel functions can be removed, renamed or completely change semantics. * Number of arguments and their positions can change, etc. @@ -34,12 +28,11 @@ int bpf_prog1(struct pt_regs *ctx) struct sk_buff *skb; int len; - /* non-portable! works for the given kernel only */ - bpf_probe_read_kernel(&skb, sizeof(skb), (void *)PT_REGS_PARM1(ctx)); - dev = _(skb->dev); - len = _(skb->len); + bpf_core_read(&skb, sizeof(skb), (void *)PT_REGS_PARM1(ctx)); + dev = BPF_CORE_READ(skb, dev); + len = BPF_CORE_READ(skb, len); - bpf_probe_read_kernel(devname, sizeof(devname), dev->name); + BPF_CORE_READ_STR_INTO(&devname, dev, name); if (devname[0] == 'l' && devname[1] == 'o') { char fmt[] = "skb %p len %d\n"; diff --git a/samples/bpf/tracex5.bpf.c b/samples/bpf/tracex5.bpf.c index 8cd697ee7047..4d3d6c9b25fa 100644 --- a/samples/bpf/tracex5.bpf.c +++ b/samples/bpf/tracex5.bpf.c @@ -10,6 +10,7 @@ #include <uapi/linux/unistd.h> #include <bpf/bpf_helpers.h> #include <bpf/bpf_tracing.h> +#include <bpf/bpf_core_read.h> #define __stringify(x) #x #define PROG(F) SEC("kprobe/"__stringify(F)) int bpf_func_##F @@ -46,7 +47,7 @@ PROG(SYS__NR_write)(struct pt_regs *ctx) { struct seccomp_data sd; - bpf_probe_read_kernel(&sd, sizeof(sd), (void *)PT_REGS_PARM2(ctx)); + bpf_core_read(&sd, sizeof(sd), (void *)PT_REGS_PARM2(ctx)); if (sd.args[2] == 512) { char fmt[] = "write(fd=%d, buf=%p, size=%d)\n"; bpf_trace_printk(fmt, sizeof(fmt), @@ -59,7 +60,7 @@ PROG(SYS__NR_read)(struct pt_regs *ctx) { struct seccomp_data sd; - bpf_probe_read_kernel(&sd, sizeof(sd), (void *)PT_REGS_PARM2(ctx)); + bpf_core_read(&sd, sizeof(sd), (void *)PT_REGS_PARM2(ctx)); if (sd.args[2] > 128 && sd.args[2] <= 1024) { char fmt[] = "read(fd=%d, buf=%p, size=%d)\n"; bpf_trace_printk(fmt, sizeof(fmt), |