[RFC,v4,12/18] bpf: Cosmetic change for bpf_prog_attach()

Commit Message

Mickaël Salaün Oct. 26, 2016, 6:56 a.m. UTC

Move code outside a switch/case to ease code factoring (cf. next
commit).

This apply on Daniel Mack's "Add eBPF hooks for cgroups" v7:
https://lkml.kernel.org/r/[e-mail]

Signed-off-by: Mickaël Salaün <[e-mail]>
Cc: Alexei Starovoitov <[e-mail]>
Cc: Daniel Borkmann <[e-mail]>
Cc: Daniel Mack <[e-mail]>
---
 kernel/bpf/syscall.c | 23 ++++++++++++-----------
 1 file changed, 12 insertions(+), 11 deletions(-)

Patch

diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 0f7faa9d2262..ac4cbb98596d 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -843,23 +843,24 @@  static int bpf_prog_attach(const union bpf_attr *attr)
 	case BPF_CGROUP_INET_EGRESS:
 		prog = bpf_prog_get_type(attr->attach_bpf_fd,
 					 BPF_PROG_TYPE_CGROUP_SKB);
-		if (IS_ERR(prog))
-			return PTR_ERR(prog);
-
-		cgrp = cgroup_get_from_fd(attr->target_fd);
-		if (IS_ERR(cgrp)) {
-			bpf_prog_put(prog);
-			return PTR_ERR(cgrp);
-		}
-
-		cgroup_bpf_update(cgrp, prog, attr->attach_type);
-		cgroup_put(cgrp);
 		break;
 
 	default:
 		return -EINVAL;
 	}
 
+	if (IS_ERR(prog))
+		return PTR_ERR(prog);
+
+	cgrp = cgroup_get_from_fd(attr->target_fd);
+	if (IS_ERR(cgrp)) {
+		bpf_prog_put(prog);
+		return PTR_ERR(cgrp);
+	}
+
+	cgroup_bpf_update(cgrp, prog, attr->attach_type);
+	cgroup_put(cgrp);
+
 	return 0;
 }