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| author | Benjamin Tissoires <bentiss@kernel.org> | 2024-06-26 15:46:23 +0200 |
|---|---|---|
| committer | Benjamin Tissoires <bentiss@kernel.org> | 2024-06-27 10:58:19 +0200 |
| commit | 67eccf151d76a9939ad8a50c6db5cb486b01df24 (patch) | |
| tree | 1a2b0d02140df64b820dded3ccc511d38d47ee1d /drivers/hid/bpf/hid_bpf_dispatch.c | |
| parent | ebae0b2a6f4b3b949f30f076fbc65d3b0bb04785 (diff) | |
| download | lwn-67eccf151d76a9939ad8a50c6db5cb486b01df24.tar.gz lwn-67eccf151d76a9939ad8a50c6db5cb486b01df24.zip | |
HID: add source argument to HID low level functions
This allows to know who actually sent what when we process the request
to the device.
This will be useful for a BPF firewall program to allow or not requests
coming from a dedicated hidraw node client.
Link: https://patch.msgid.link/20240626-hid_hw_req_bpf-v2-2-cfd60fb6c79f@kernel.org
Acked-by: Jiri Kosina <jkosina@suse.com>
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
Diffstat (limited to 'drivers/hid/bpf/hid_bpf_dispatch.c')
| -rw-r--r-- | drivers/hid/bpf/hid_bpf_dispatch.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/hid/bpf/hid_bpf_dispatch.c b/drivers/hid/bpf/hid_bpf_dispatch.c index b7b11a7c69db..2df31decaac3 100644 --- a/drivers/hid/bpf/hid_bpf_dispatch.c +++ b/drivers/hid/bpf/hid_bpf_dispatch.c @@ -24,7 +24,7 @@ EXPORT_SYMBOL(hid_ops); u8 * dispatch_hid_bpf_device_event(struct hid_device *hdev, enum hid_report_type type, u8 *data, - u32 *size, int interrupt) + u32 *size, int interrupt, u64 source) { struct hid_bpf_ctx_kern ctx_kern = { .ctx = { @@ -50,7 +50,7 @@ dispatch_hid_bpf_device_event(struct hid_device *hdev, enum hid_report_type type rcu_read_lock(); list_for_each_entry_rcu(e, &hdev->bpf.prog_list, list) { if (e->hid_device_event) { - ret = e->hid_device_event(&ctx_kern.ctx, type); + ret = e->hid_device_event(&ctx_kern.ctx, type, source); if (ret < 0) { rcu_read_unlock(); return ERR_PTR(ret); @@ -359,7 +359,8 @@ hid_bpf_hw_request(struct hid_bpf_ctx *ctx, __u8 *buf, size_t buf__sz, dma_data, size, rtype, - reqtype); + reqtype, + (__u64)ctx); if (ret > 0) memcpy(buf, dma_data, ret); @@ -398,7 +399,8 @@ hid_bpf_hw_output_report(struct hid_bpf_ctx *ctx, __u8 *buf, size_t buf__sz) ret = hid_ops->hid_hw_output_report(hdev, dma_data, - size); + size, + (__u64)ctx); kfree(dma_data); return ret; @@ -429,7 +431,7 @@ hid_bpf_input_report(struct hid_bpf_ctx *ctx, enum hid_report_type type, u8 *buf hdev = (struct hid_device *)ctx->hid; /* discard const */ - return hid_ops->hid_input_report(hdev, type, buf, size, 0); + return hid_ops->hid_input_report(hdev, type, buf, size, 0, (__u64)ctx); } __bpf_kfunc_end_defs(); |