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-rw-r--r--kernel/pid.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/kernel/pid.c b/kernel/pid.c
index 74ddbff1a6ba..a96bc4bf4f86 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -520,6 +520,25 @@ struct pid *find_ge_pid(int nr, struct pid_namespace *ns)
return idr_get_next(&ns->idr, &nr);
}
+struct pid *pidfd_get_pid(unsigned int fd, unsigned int *flags)
+{
+ struct fd f;
+ struct pid *pid;
+
+ f = fdget(fd);
+ if (!f.file)
+ return ERR_PTR(-EBADF);
+
+ pid = pidfd_pid(f.file);
+ if (!IS_ERR(pid)) {
+ get_pid(pid);
+ *flags = f.file->f_flags;
+ }
+
+ fdput(f);
+ return pid;
+}
+
/**
* pidfd_create() - Create a new pid file descriptor.
*