Replace kprobe function "blk_account_io_completion" to "blk_account_io_done" for kernel version >= 5.8.0
The kernel function "blk_account_io_completion" is not available anymore as attach point of Kprobe as of kernel version 5.8.0. Therefore, after discussions, we decided to use function "blk_account_io_done" instead in every kprobe attachment to "blk_account_io_completion".
diff --git a/examples/lua/kprobe-latency.lua b/examples/lua/kprobe-latency.lua
index 60ac2c1..98464e5 100644
--- a/examples/lua/kprobe-latency.lua
+++ b/examples/lua/kprobe-latency.lua
@@ -30,7 +30,7 @@
local trace_start = bpf.kprobe('myprobe:blk_start_request', function (ptregs)
map[ptregs.parm1] = time()
end, false, -1, 0)
-local trace_end = bpf.kprobe('myprobe2:blk_account_io_completion', function (ptregs)
+local trace_end = bpf.kprobe('myprobe2:blk_account_io_done', function (ptregs)
-- The lines below are computing index
-- using log10(x)*10 = log2(x)*10/log2(10) = log2(x)*3
-- index = 29 ~ 1 usec
diff --git a/examples/tracing/bitehist.py b/examples/tracing/bitehist.py
index 4d7c795..89ceb30 100755
--- a/examples/tracing/bitehist.py
+++ b/examples/tracing/bitehist.py
@@ -25,7 +25,7 @@
BPF_HISTOGRAM(dist);
BPF_HISTOGRAM(dist_linear);
-int kprobe__blk_account_io_completion(struct pt_regs *ctx, struct request *req)
+int kprobe__blk_account_io_done(struct pt_regs *ctx, struct request *req)
{
dist.increment(bpf_log2l(req->__data_len / 1024));
dist_linear.increment(req->__data_len / 1024);
diff --git a/examples/tracing/disksnoop.py b/examples/tracing/disksnoop.py
index 1101e6f..a35e1ab 100755
--- a/examples/tracing/disksnoop.py
+++ b/examples/tracing/disksnoop.py
@@ -46,7 +46,7 @@
if BPF.get_kprobe_functions(b'blk_start_request'):
b.attach_kprobe(event="blk_start_request", fn_name="trace_start")
b.attach_kprobe(event="blk_mq_start_request", fn_name="trace_start")
-b.attach_kprobe(event="blk_account_io_completion", fn_name="trace_completion")
+b.attach_kprobe(event="blk_account_io_done", fn_name="trace_completion")
# header
print("%-18s %-2s %-7s %8s" % ("TIME(s)", "T", "BYTES", "LAT(ms)"))