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bpf: move common code to a separate function

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* bpf.c (bpf_prog_attach_detach): New function.
(bpf_prog_attach, bpf_prog_detach): Use it.
This commit is contained in:
Дмитрий Левин 2017-01-28 22:11:20 +00:00
parent 0a8dd6a68c
commit 3c356c40e4
1 changed files with 14 additions and 24 deletions
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38
bpf.c
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@ -207,8 +207,8 @@ bpf_obj_manage(struct tcb *const tcp, const kernel_ulong_t addr,
}
static int
bpf_prog_attach(struct tcb *const tcp, const kernel_ulong_t addr,
unsigned int size)
bpf_prog_attach_detach(struct tcb *const tcp, const kernel_ulong_t addr,
unsigned int size, bool print_attach_bpf_fd)
{
struct {
uint32_t target_fd, attach_bpf_fd, attach_type;
@ -225,8 +225,10 @@ bpf_prog_attach(struct tcb *const tcp, const kernel_ulong_t addr,
tprintf("{target_fd=");
printfd(tcp, attr.target_fd);
tprintf(", attach_bpf_fd=");
printfd(tcp, attr.attach_bpf_fd);
if (print_attach_bpf_fd) {
tprintf(", attach_bpf_fd=");
printfd(tcp, attr.attach_bpf_fd);
}
tprintf(", attach_type=");
printxval(bpf_attach_type, attr.attach_type, "BPF_???");
tprintf("}");
@ -234,30 +236,18 @@ bpf_prog_attach(struct tcb *const tcp, const kernel_ulong_t addr,
return RVAL_DECODED;
}
static int
bpf_prog_attach(struct tcb *const tcp, const kernel_ulong_t addr,
unsigned int size)
{
return bpf_prog_attach_detach(tcp, addr, size, true);
}
static int
bpf_prog_detach(struct tcb *const tcp, const kernel_ulong_t addr,
unsigned int size)
{
struct {
uint32_t target_fd, attach_bpf_fd, attach_type;
} attr = {};
if (!size) {
printaddr(addr);
return RVAL_DECODED;
}
if (size > sizeof(attr))
size = sizeof(attr);
if (umoven_or_printaddr(tcp, addr, size, &attr))
return RVAL_DECODED;
tprintf("{target_fd=");
printfd(tcp, attr.target_fd);
tprintf(", attach_type=");
printxval(bpf_attach_type, attr.attach_type, "BPF_???");
tprintf("}");
return RVAL_DECODED;
return bpf_prog_attach_detach(tcp, addr, size, false);
}
SYS_FUNC(bpf)