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 v13 3/4] tools: Added bpf_get_ns_current_pid_tgid helper
Date: Wed, 9 Oct 2019 12:26:31 -0300 [thread overview]
Message-ID: <20191009152632.14218-4-cneirabustos@gmail.com> (raw)
In-Reply-To: <20191009152632.14218-1-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 | 22 +++++++++++++++++++++-
1 file changed, 21 insertions(+), 1 deletion(-)
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index 77c6be96d676..6ad3f2abf00d 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -2750,6 +2750,19 @@ 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(struct *bpf_pidns_info, u32 size)
+ * Return
+ * 0 on success, values for pid and tgid from nsinfo will be as seen
+ * from the namespace that matches dev and inum from nsinfo.
+ *
+ * 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 +2875,8 @@ 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
@@ -3613,4 +3627,10 @@ struct bpf_sockopt {
__s32 retval;
};
+struct bpf_pidns_info {
+ __u64 dev;
+ __u64 inum;
+ __u32 pid;
+ __u32 tgid;
+};
#endif /* _UAPI__LINUX_BPF_H__ */
--
2.20.1
next prev parent reply other threads:[~2019-10-09 15:26 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-09 15:26 [PATCH v13 0/4] BPF: New helper to obtain namespace data from current task Carlos Neira
2019-10-09 15:26 ` [PATCH v13 1/4] fs/nsfs.c: added ns_match Carlos Neira
2019-10-09 15:26 ` [PATCH v13 2/4] bpf: added new helper bpf_get_ns_current_pid_tgid Carlos Neira
2019-10-09 16:14 ` Andrii Nakryiko
2019-10-09 17:45 ` Carlos Antonio Neira Bustos
2019-10-09 19:50 ` Andrii Nakryiko
2019-10-09 20:30 ` Carlos Antonio Neira Bustos
2019-10-09 15:26 ` Carlos Neira [this message]
2019-10-09 15:26 ` [PATCH v13 4/4] tools/testing/selftests/bpf: Add self-tests for new helper Carlos Neira
2019-10-09 16:26 ` Andrii Nakryiko
2019-10-09 16:44 ` Carlos Antonio Neira Bustos
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20191009152632.14218-4-cneirabustos@gmail.com \
--to=cneirabustos@gmail.com \
--cc=bpf@vger.kernel.org \
--cc=brouer@redhat.com \
--cc=ebiederm@xmission.com \
--cc=netdev@vger.kernel.org \
--cc=yhs@fb.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).