From: David Ahern <dsahern@xxxxxxxxx>
Add TGID attribute and put in every message. This is need for perf for
example when processing messages with maps.
Signed-off-by: David Ahern <dsahern@xxxxxxxxx>
Signed-off-by: Andrey Vagin <avagin@xxxxxxxxxx>
---
include/uapi/linux/task_diag.h | 1 +
kernel/taskdiag.c | 8 +++++++-
2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/include/uapi/linux/task_diag.h b/include/uapi/linux/task_diag.h
index 19c9579..935502b 100644
--- a/include/uapi/linux/task_diag.h
+++ b/include/uapi/linux/task_diag.h
@@ -15,6 +15,7 @@ enum {
/* other attributes */
TASK_DIAG_PID = 64, /* u32 */
+ TASK_DIAG_TGID, /* u32 */
__TASK_DIAG_ATTR_MAX
#define TASK_DIAG_ATTR_MAX (__TASK_DIAG_ATTR_MAX - 1)
diff --git a/kernel/taskdiag.c b/kernel/taskdiag.c
index 6549df3..ccba538 100644
--- a/kernel/taskdiag.c
+++ b/kernel/taskdiag.c
@@ -13,6 +13,7 @@ static size_t taskdiag_packet_size(u64 show_flags, int n_vma)
size_t size;
size = nla_total_size(sizeof(u32)); /* PID */
+ + nla_total_size(sizeof(u32)); /* TGID */
if (show_flags & TASK_DIAG_SHOW_BASE)
size += nla_total_size(sizeof(struct task_diag_base));
@@ -451,7 +452,7 @@ static int task_diag_fill(struct task_struct *tsk, struct sk_buff *skb,
int err = 0, i = 0, n = 0;
bool progress = false;
int flags = 0;
- u32 pid;
+ u32 pid, tgid;
if (cb) {
n = cb->args[2];
@@ -468,6 +469,11 @@ static int task_diag_fill(struct task_struct *tsk, struct sk_buff *skb,
if (err)
goto err;
+ tgid = task_tgid_vnr(tsk);
+ err = nla_put_u32(skb, TASK_DIAG_TGID, tgid);
+ if (err)
+ goto err;
+
if (show_flags & TASK_DIAG_SHOW_BASE) {
if (i >= n)
err = fill_task_base(tsk, skb);
--
2.1.0
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