xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net: filter: simplify socket charging

Browse Source 
attaching bpf program to a socket involves multiple socket memory arithmetic,
since size of 'sk_filter' is changing when classic BPF is converted to eBPF.
Also common path of program creation has to deal with two ways of freeing
the memory.

Simplify the code by delaying socket charging until program is ready and
its size is known

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexei Starovoitov
2014-07-30 20:34:12 -07:00
committed by David S. Miller
parent 4330487acf
commit 278571baca
3 changed files with 44 additions and 52 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/filter.h
View File

@@ -366,7 +366,7 @@ int sk_chk_filter(const struct sock_filter *filter, unsigned int flen);
int sk_get_filter(struct sock *sk, struct sock_filter __user *filter,
unsigned int len);
void sk_filter_charge(struct sock *sk, struct sk_filter *fp);
bool sk_filter_charge(struct sock *sk, struct sk_filter *fp);
void sk_filter_uncharge(struct sock *sk, struct sk_filter *fp);
u64 __bpf_call_base(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);