diff options
| author | Daniel Borkmann <daniel@iogearbox.net> | 2015-10-29 14:58:08 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-11-02 22:48:39 -0500 |
| commit | e9d8afa90b789b07d414637ab557d169d6b2b84e (patch) | |
| tree | 534e0a4721d7d9af501b4bdf10757a517109c3af /kernel/bpf/core.c | |
| parent | c210129760a010b555372ef74f4e1a46d4eb8a22 (diff) | |
bpf: consolidate bpf_prog_put{, _rcu} dismantle paths
We currently have duplicated cleanup code in bpf_prog_put() and
bpf_prog_put_rcu() cleanup paths. Back then we decided that it was
not worth it to make it a common helper called by both, but with
the recent addition of resource charging, we could have avoided
the fix in commit ac00737f4e81 ("bpf: Need to call bpf_prog_uncharge_memlock
from bpf_prog_put") if we would have had only a single, common path.
We can simplify it further by assigning aux->prog only once during
allocation time.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel/bpf/core.c')
| -rw-r--r-- | kernel/bpf/core.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c index 80864712d2c4..334b1bdd572c 100644 --- a/kernel/bpf/core.c +++ b/kernel/bpf/core.c @@ -92,6 +92,7 @@ struct bpf_prog *bpf_prog_alloc(unsigned int size, gfp_t gfp_extra_flags) fp->pages = size / PAGE_SIZE; fp->aux = aux; + fp->aux->prog = fp; return fp; } @@ -116,6 +117,7 @@ struct bpf_prog *bpf_prog_realloc(struct bpf_prog *fp_old, unsigned int size, memcpy(fp, fp_old, fp_old->pages * PAGE_SIZE); fp->pages = size / PAGE_SIZE; + fp->aux->prog = fp; /* We keep fp->aux from fp_old around in the new * reallocated structure. @@ -726,7 +728,6 @@ void bpf_prog_free(struct bpf_prog *fp) struct bpf_prog_aux *aux = fp->aux; INIT_WORK(&aux->work, bpf_prog_free_deferred); - aux->prog = fp; schedule_work(&aux->work); } EXPORT_SYMBOL_GPL(bpf_prog_free); |