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bpf: pass prog instead of env to bpf_prog_offload_verifier_prep()

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Function bpf_prog_offload_verifier_prep(), called from the kernel BPF
verifier to run a driver-specific callback for preparing for the
verification step for offloaded programs, takes a pointer to a struct
bpf_verifier_env object. However, no driver callback needs the whole
structure at this time: the two drivers supporting this, nfp and
netdevsim, only need a pointer to the struct bpf_prog instance held by
env.

Update the callback accordingly, on kernel side and in these two
drivers.

Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Quentin Monnet 2018-11-09 13:03:31 +00:00 committed by Alexei Starovoitov
parent eb9119471e
commit a40a26322a
6 changed files with 9 additions and 10 deletions
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3
drivers/net/ethernet/netronome/nfp/bpf/offload.c
View File

@ -183,10 +183,9 @@ static void nfp_prog_free(struct nfp_prog *nfp_prog)
}
static int
nfp_bpf_verifier_prep(struct net_device *netdev, struct bpf_verifier_env *env)
nfp_bpf_verifier_prep(struct net_device *netdev, struct bpf_prog *prog)
{
struct nfp_net *nn = netdev_priv(netdev);
struct bpf_prog *prog = env->prog;
struct nfp_app *app = nn->app;
struct nfp_prog *nfp_prog;
int ret;

4
drivers/net/netdevsim/bpf.c
View File

@ -259,14 +259,14 @@ static int nsim_bpf_create_prog(struct netdevsim *ns, struct bpf_prog *prog)
}
static int
nsim_bpf_verifier_prep(struct net_device *dev, struct bpf_verifier_env *env)
nsim_bpf_verifier_prep(struct net_device *dev, struct bpf_prog *prog)
{
struct netdevsim *ns = netdev_priv(dev);
if (!ns->bpf_bind_accept)
return -EOPNOTSUPP;
return nsim_bpf_create_prog(ns, env->prog);
return nsim_bpf_create_prog(ns, prog);
}
static int nsim_bpf_translate(struct net_device *dev, struct bpf_prog *prog)

2
include/linux/bpf.h
View File

@ -268,7 +268,7 @@ struct bpf_prog_offload_ops {
int (*insn_hook)(struct bpf_verifier_env *env,
int insn_idx, int prev_insn_idx);
int (*finalize)(struct bpf_verifier_env *env);
int (*prepare)(struct net_device *netdev, struct bpf_verifier_env *env);
int (*prepare)(struct net_device *netdev, struct bpf_prog *prog);
int (*translate)(struct net_device *netdev, struct bpf_prog *prog);
void (*destroy)(struct bpf_prog *prog);
};

2
include/linux/bpf_verifier.h
View File

@ -245,7 +245,7 @@ static inline struct bpf_reg_state *cur_regs(struct bpf_verifier_env *env)
return cur_func(env)->regs;
}
int bpf_prog_offload_verifier_prep(struct bpf_verifier_env *env);
int bpf_prog_offload_verifier_prep(struct bpf_prog *prog);
int bpf_prog_offload_verify_insn(struct bpf_verifier_env *env,
int insn_idx, int prev_insn_idx);
int bpf_prog_offload_finalize(struct bpf_verifier_env *env);

6
kernel/bpf/offload.c
View File

@ -123,15 +123,15 @@ int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr)
return err;
}
int bpf_prog_offload_verifier_prep(struct bpf_verifier_env *env)
int bpf_prog_offload_verifier_prep(struct bpf_prog *prog)
{
struct bpf_prog_offload *offload;
int ret = -ENODEV;
down_read(&bpf_devs_lock);
offload = env->prog->aux->offload;
offload = prog->aux->offload;
if (offload)
ret = offload->offdev->ops->prepare(offload->netdev, env);
ret = offload->offdev->ops->prepare(offload->netdev, prog);
offload->dev_state = !ret;
up_read(&bpf_devs_lock);

2
kernel/bpf/verifier.c
View File

@ -6368,7 +6368,7 @@ int bpf_check(struct bpf_prog **prog, union bpf_attr *attr)
goto skip_full_check;
if (bpf_prog_is_dev_bound(env->prog->aux)) {
ret = bpf_prog_offload_verifier_prep(env);
ret = bpf_prog_offload_verifier_prep(env->prog);
if (ret)
goto skip_full_check;
}