diff options
| author | Benjamin Tissoires <benjamin.tissoires@redhat.com> | 2022-11-03 18:57:49 +0300 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2022-11-15 18:28:30 +0300 |
| commit | 91a7f802d1852f60139712bdcfa98db547ce0531 (patch) | |
| tree | 84182f39b96115288e80ca7293deec92d41486e6 /include | |
| parent | 0330f725cc5b01f4149a2a21e474b2090a1dcead (diff) | |
| download | linux-91a7f802d1852f60139712bdcfa98db547ce0531.tar.xz | |
HID: bpf: introduce hid_hw_request()
This function can not be called under IRQ, thus it is only available
while in SEC("syscall").
For consistency, this function requires a HID-BPF context to work with,
and so we also provide a helper to create one based on the HID unique
ID.
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
--
changes in v12:
- variable dereferenced before check 'ctx'
|Reported-by: kernel test robot <lkp@intel.com>
|Reported-by: Dan Carpenter <error27@gmail.com>
no changes in v11
no changes in v10
changes in v9:
- fixed kfunc declaration aaccording to latest upstream changes
no changes in v8
changes in v7:
- hid_bpf_allocate_context: remove unused variable
- ensures buf is not NULL
changes in v6:
- rename parameter size into buf__sz to teach the verifier about
the actual buffer size used by the call
- remove the allocated data in the user created context, it's not used
new-ish in v5
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/hid_bpf.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/include/linux/hid_bpf.h b/include/linux/hid_bpf.h index b3de462ef3a6..1d24b72059bc 100644 --- a/include/linux/hid_bpf.h +++ b/include/linux/hid_bpf.h @@ -76,11 +76,15 @@ enum hid_bpf_attach_flags { int hid_bpf_device_event(struct hid_bpf_ctx *ctx); /* Following functions are kfunc that we export to BPF programs */ -/* only available in tracing */ +/* available everywhere in HID-BPF */ __u8 *hid_bpf_get_data(struct hid_bpf_ctx *ctx, unsigned int offset, const size_t __sz); /* only available in syscall */ int hid_bpf_attach_prog(unsigned int hid_id, int prog_fd, __u32 flags); +int hid_bpf_hw_request(struct hid_bpf_ctx *ctx, __u8 *buf, size_t buf__sz, + enum hid_report_type rtype, enum hid_class_request reqtype); +struct hid_bpf_ctx *hid_bpf_allocate_context(unsigned int hid_id); +void hid_bpf_release_context(struct hid_bpf_ctx *ctx); /* * Below is HID internal @@ -99,7 +103,14 @@ enum hid_bpf_prog_type { HID_BPF_PROG_TYPE_MAX, }; +struct hid_report_enum; + struct hid_bpf_ops { + struct hid_report *(*hid_get_report)(struct hid_report_enum *report_enum, const u8 *data); + int (*hid_hw_raw_request)(struct hid_device *hdev, + unsigned char reportnum, __u8 *buf, + size_t len, enum hid_report_type rtype, + enum hid_class_request reqtype); struct module *owner; struct bus_type *bus_type; }; |