projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 14b50f80 VK |
1 | /* |
| 2 | * Kernel/userspace transport abstraction for Hyper-V util driver. | |
| 3 | * | |
| 4 | * Copyright (C) 2015, Vitaly Kuznetsov <vkuznets@redhat.com> | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify it | |
| 7 | * under the terms of the GNU General Public License version 2 as published | |
| 8 | * by the Free Software Foundation. | |
| 9 | * | |
| 10 | * This program is distributed in the hope that it will be useful, but | |
| 11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
| 13 | * NON INFRINGEMENT. See the GNU General Public License for more | |
| 14 | * details. | |
| 15 | * | |
| 16 | */ | |
| 17 | ||
| 18 | #ifndef _HV_UTILS_TRANSPORT_H | |
| 19 | #define _HV_UTILS_TRANSPORT_H | |
| 20 | ||
| 21 | #include <linux/connector.h> | |
| 22 | #include <linux/miscdevice.h> | |
| 23 | ||
| 24 | enum hvutil_transport_mode { | |
| 25 | HVUTIL_TRANSPORT_INIT = 0, | |
| 26 | HVUTIL_TRANSPORT_NETLINK, | |
| 27 | HVUTIL_TRANSPORT_CHARDEV, | |
| a1502566 | 28 | HVUTIL_TRANSPORT_DESTROY, |
| 14b50f80 VK |
29 | }; |
| 30 | ||
| 31 | struct hvutil_transport { | |
| 32 | int mode; /* hvutil_transport_mode */ | |
| 33 | struct file_operations fops; /* file operations */ | |
| 34 | struct miscdevice mdev; /* misc device */ | |
| 35 | struct cb_id cn_id; /* CN_*_IDX/CN_*_VAL */ | |
| 36 | struct list_head list; /* hvt_list */ | |
| 37 | int (*on_msg)(void *, int); /* callback on new user message */ | |
| 38 | void (*on_reset)(void); /* callback when userspace drops */ | |
| 39 | u8 *outmsg; /* message to the userspace */ | |
| 40 | int outmsg_len; /* its length */ | |
| 41 | wait_queue_head_t outmsg_q; /* poll/read wait queue */ | |
| a72f3a4c | 42 | struct mutex lock; /* protects struct members */ |
| 14b50f80 VK |
43 | }; |
| 44 | ||
| 45 | struct hvutil_transport *hvutil_transport_init(const char *name, | |
| 46 | u32 cn_idx, u32 cn_val, | |
| 47 | int (*on_msg)(void *, int), | |
| 48 | void (*on_reset)(void)); | |
| 49 | int hvutil_transport_send(struct hvutil_transport *hvt, void *msg, int len); | |
| 50 | void hvutil_transport_destroy(struct hvutil_transport *hvt); | |
| 51 | ||
| 52 | #endif /* _HV_UTILS_TRANSPORT_H */ |