bpf_msleep_interruptible() puts a calling context into an
interruptible sleep. This function is expected to be used
for testing only (perhaps in conjunction with fault-injection)
to simulate various execution delays or timeouts.
Signed-off-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
---
v2:
-- switched to kfunc (Matt)
kernel/bpf/helpers.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c
index fed53da75025..a7404ab3b0b8 100644
--- a/kernel/bpf/helpers.c
+++ b/kernel/bpf/helpers.c
@@ -24,6 +24,7 @@
#include <linux/bpf_mem_alloc.h>
#include <linux/kasan.h>
#include <linux/bpf_verifier.h>
+#include <linux/delay.h>
#include "../../lib/kstrtox.h"
@@ -3283,6 +3284,11 @@ __bpf_kfunc void bpf_local_irq_restore(unsigned long *flags__irq_flag)
local_irq_restore(*flags__irq_flag);
}
+__bpf_kfunc unsigned long bpf_msleep_interruptible(unsigned int msecs)
+{
+ return msleep_interruptible(msecs);
+}
+
__bpf_kfunc_end_defs();
BTF_KFUNCS_START(generic_btf_ids)
@@ -3388,6 +3394,7 @@ BTF_ID_FLAGS(func, bpf_iter_kmem_cache_next, KF_ITER_NEXT | KF_RET_NULL | KF_SLE
BTF_ID_FLAGS(func, bpf_iter_kmem_cache_destroy, KF_ITER_DESTROY | KF_SLEEPABLE)
BTF_ID_FLAGS(func, bpf_local_irq_save)
BTF_ID_FLAGS(func, bpf_local_irq_restore)
+BTF_ID_FLAGS(func, bpf_msleep_interruptible, KF_SLEEPABLE)
BTF_KFUNCS_END(common_btf_ids)
static const struct btf_kfunc_id_set common_kfunc_set = {
--
2.49.0.1101.gccaa498523-goog
