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| author | Alexei Starovoitov <ast@plumgrid.com> | 2015-06-13 04:39:12 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-06-16 00:53:50 +0200 |
| commit | ffeedafbf0236f03aeb2e8db273b3e5ae5f5bc89 (patch) | |
| tree | e00f1b0bba1c217afbcf4dda00ef950afdfcafbc /net/core | |
| parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next (diff) | |
| download | linux-ffeedafbf0236f03aeb2e8db273b3e5ae5f5bc89.tar.xz linux-ffeedafbf0236f03aeb2e8db273b3e5ae5f5bc89.zip | |
bpf: introduce current->pid, tgid, uid, gid, comm accessors
eBPF programs attached to kprobes need to filter based on
current->pid, uid and other fields, so introduce helper functions:
u64 bpf_get_current_pid_tgid(void)
Return: current->tgid << 32 | current->pid
u64 bpf_get_current_uid_gid(void)
Return: current_gid << 32 | current_uid
bpf_get_current_comm(char *buf, int size_of_buf)
stores current->comm into buf
They can be used from the programs attached to TC as well to classify packets
based on current task fields.
Update tracex2 example to print histogram of write syscalls for each process
instead of aggregated for all.
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/filter.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/net/core/filter.c b/net/core/filter.c index d271c06bf01f..20aa51ccbf9d 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -1459,6 +1459,12 @@ tc_cls_act_func_proto(enum bpf_func_id func_id) return &bpf_l4_csum_replace_proto; case BPF_FUNC_clone_redirect: return &bpf_clone_redirect_proto; + case BPF_FUNC_get_current_pid_tgid: + return &bpf_get_current_pid_tgid_proto; + case BPF_FUNC_get_current_uid_gid: + return &bpf_get_current_uid_gid_proto; + case BPF_FUNC_get_current_comm: + return &bpf_get_current_comm_proto; default: return sk_filter_func_proto(func_id); } |