From 367ec3e4834cbd611401c2c40a23c22c825474f1 Mon Sep 17 00:00:00 2001 From: Yonghong Song Date: Sat, 9 May 2020 10:59:06 -0700 Subject: bpf: Create file bpf iterator To produce a file bpf iterator, the fd must be corresponding to a link_fd assocciated with a trace/iter program. When the pinned file is opened, a seq_file will be generated. Signed-off-by: Yonghong Song Signed-off-by: Alexei Starovoitov Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20200509175906.2475893-1-yhs@fb.com --- kernel/bpf/inode.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'kernel/bpf/inode.c') diff --git a/kernel/bpf/inode.c b/kernel/bpf/inode.c index 95087d9f4ed3..fb878ba3f22f 100644 --- a/kernel/bpf/inode.c +++ b/kernel/bpf/inode.c @@ -358,8 +358,11 @@ static int bpf_mkmap(struct dentry *dentry, umode_t mode, void *arg) static int bpf_mklink(struct dentry *dentry, umode_t mode, void *arg) { + struct bpf_link *link = arg; + return bpf_mkobj_ops(dentry, mode, arg, &bpf_link_iops, - &bpffs_obj_fops); + bpf_link_is_iter(link) ? + &bpf_iter_fops : &bpffs_obj_fops); } static struct dentry * -- cgit v1.2.3