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samples: bpf: fix: broken sample regarding removed function

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Currently, running sample "task_fd_query" and "tracex3" occurs the
following error. On kernel v5.0-rc* this sample will be unavailable
due to the removal of function 'blk_start_request' at commit "a1ce35f".
(function removed, as "Single Queue IO scheduler" no longer exists)

$ sudo ./task_fd_query
failed to create kprobe 'blk_start_request' error 'No such file or
directory'

This commit will change the function 'blk_start_request' to
'blk_mq_start_request' to fix the broken sample.

Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Daniel T. Lee
2019-02-27 02:52:26 -05:00
committed by Daniel Borkmann
parent da4e023e45
commit d2e614cb07
3 changed files with 3 additions and 3 deletions
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samples/bpf/task_fd_query_user.c
+1 -1
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@@ -311,7 +311,7 @@ int main(int argc, char **argv)
}
/* test two functions in the corresponding *_kern.c file */
CHECK_AND_RET(test_debug_fs_kprobe(0, "blk_start_request",
CHECK_AND_RET(test_debug_fs_kprobe(0, "blk_mq_start_request",
BPF_FD_TYPE_KPROBE));
CHECK_AND_RET(test_debug_fs_kprobe(1, "blk_account_io_completion",
BPF_FD_TYPE_KRETPROBE));