From: Carlos Neira <cneirabustos@gmail.com>
To: netdev@vger.kernel.org
Cc: yhs@fb.com, ebiederm@xmission.com, brouer@redhat.com,
bpf@vger.kernel.org, cneirabustos@gmail.com
Subject: [PATCH V12 3/4] tools: Added bpf_get_ns_current_pid_tgid helper
Date: Tue, 1 Oct 2019 18:41:40 -0300 [thread overview]
Message-ID: <20191001214141.6294-4-cneirabustos@gmail.com> (raw)
In-Reply-To: <20191001214141.6294-1-cneirabustos@gmail.com>
sync tools/include/uapi/linux/bpf.h to include new helper.
Signed-off-by: Carlos Neira <cneirabustos@gmail.com>
---
tools/include/uapi/linux/bpf.h | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index 77c6be96d676..ea8145d7f897 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -2750,6 +2750,21 @@ union bpf_attr {
* **-EOPNOTSUPP** kernel configuration does not enable SYN cookies
*
* **-EPROTONOSUPPORT** IP packet version is not 4 or 6
+ *
+ * u64 bpf_get_ns_current_pid_tgid(u64 dev, u64 inum)
+ * Return
+ * A 64-bit integer containing the current tgid and pid from current task
+ * which namespace inode and dev_t matches , and is create as such:
+ * *current_task*\ **->tgid << 32 \|**
+ * *current_task*\ **->pid**.
+ *
+ * On failure, the returned value is one of the following:
+ *
+ * **-EINVAL** if dev and inum supplied don't match dev_t and inode number
+ * with nsfs of current task, or if dev conversion to dev_t lost high bits.
+ *
+ * **-ENOENT** if /proc/self/ns does not exists.
+ *
*/
#define __BPF_FUNC_MAPPER(FN) \
FN(unspec), \
@@ -2862,7 +2877,8 @@ union bpf_attr {
FN(sk_storage_get), \
FN(sk_storage_delete), \
FN(send_signal), \
- FN(tcp_gen_syncookie),
+ FN(tcp_gen_syncookie), \
+ FN(get_ns_current_pid_tgid),
/* integer value in 'imm' field of BPF_CALL instruction selects which helper
* function eBPF program intends to call
--
2.20.1
next prev parent reply other threads:[~2019-10-01 21:42 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-01 21:41 [PATCH V12 0/4] BPF: New helper to obtain namespace data from current task Carlos Neira
2019-10-01 21:41 ` [PATCH V12 1/4] fs/nsfs.c: added ns_match Carlos Neira
2019-10-01 21:41 ` [PATCH V12 2/4] bpf: added new helper bpf_get_ns_current_pid_tgid Carlos Neira
2019-10-02 10:52 ` Daniel Borkmann
2019-10-03 14:52 ` Carlos Antonio Neira Bustos
2019-10-03 17:30 ` Andrii Nakryiko
2019-10-03 18:12 ` Carlos Antonio Neira Bustos
2019-10-01 21:41 ` Carlos Neira [this message]
2019-10-01 21:41 ` [PATCH V12 4/4] tools/testing/selftests/bpf: Add self-tests for new helper Carlos Neira
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