summaryrefslogtreecommitdiffstats
path: root/include/uapi
diff options
context:
space:
mode:
authorAlexei Starovoitov <ast@fb.com>2016-07-06 22:38:36 -0700
committerDavid S. Miller <davem@davemloft.net>2016-07-09 00:00:16 -0400
commit606274c5abd8e245add01bc7145a8cbb92b69ba8 (patch)
tree762718058c0cf327284f07fa6c1eb2410ee3e0b7 /include/uapi
parentd390238c4fba7c87a3bcd859ce3373c864eb7b02 (diff)
downloadlinux-606274c5abd8e245add01bc7145a8cbb92b69ba8.tar.gz
linux-606274c5abd8e245add01bc7145a8cbb92b69ba8.tar.bz2
linux-606274c5abd8e245add01bc7145a8cbb92b69ba8.zip
bpf: introduce bpf_get_current_task() helper
over time there were multiple requests to access different data structures and fields of task_struct current, so finally add the helper to access 'current' as-is. Tracing bpf programs will do the rest of walking the pointers via bpf_probe_read(). Note that current can be null and bpf program has to deal it with, but even dumb passing null into bpf_probe_read() is still safe. Suggested-by: Brendan Gregg <brendan.d.gregg@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/uapi')
-rw-r--r--include/uapi/linux/bpf.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index c14ca1cd6297..262a7e883b19 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -357,6 +357,13 @@ enum bpf_func_id {
*/
BPF_FUNC_get_hash_recalc,
+ /**
+ * u64 bpf_get_current_task(void)
+ * Returns current task_struct
+ * Return: current
+ */
+ BPF_FUNC_get_current_task,
+
__BPF_FUNC_MAX_ID,
};