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34 #ifndef CHANNEL_MANAGER_H_
35 #define CHANNEL_MANAGER_H_
41 #include <linux/limits.h>
43 #include <rte_atomic.h>
44 #include "channel_commands.h"
46 /* Maximum name length including '\0' terminator */
47 #define CHANNEL_MGR_MAX_NAME_LEN 64
49 /* Maximum number of channels to each Virtual Machine */
50 #define CHANNEL_MGR_MAX_CHANNELS 64
52 /* Hypervisor Path for libvirt(qemu/KVM) */
53 #define CHANNEL_MGR_DEFAULT_HV_PATH "qemu:///system"
55 /* File socket directory */
56 #define CHANNEL_MGR_SOCKET_PATH "/tmp/powermonitor/"
59 struct sockaddr_un _sockaddr_un;
60 #define UNIX_PATH_MAX sizeof(_sockaddr_un.sun_path)
63 /* Communication Channel Status */
64 enum channel_status { CHANNEL_MGR_CHANNEL_DISCONNECTED = 0,
65 CHANNEL_MGR_CHANNEL_CONNECTED,
66 CHANNEL_MGR_CHANNEL_DISABLED,
67 CHANNEL_MGR_CHANNEL_PROCESSING};
69 /* VM libvirt(qemu/KVM) connection status */
70 enum vm_status { CHANNEL_MGR_VM_INACTIVE = 0, CHANNEL_MGR_VM_ACTIVE};
73 * Represents a single and exclusive VM channel that exists between a guest and
77 char channel_path[UNIX_PATH_MAX]; /**< Path to host socket */
78 volatile uint32_t status; /**< Connection status(enum channel_status) */
79 int fd; /**< AF_UNIX socket fd */
80 unsigned channel_num; /**< CHANNEL_MGR_SOCKET_PATH/<vm_name>.channel_num */
81 void *priv_info; /**< Pointer to private info, do not modify */
84 /* Represents a single VM instance used to return internal information about
87 char name[CHANNEL_MGR_MAX_NAME_LEN]; /**< VM name */
88 enum vm_status status; /**< libvirt status */
89 uint64_t pcpu_mask[CHANNEL_CMDS_MAX_CPUS]; /**< pCPU mask for each vCPU */
90 unsigned num_vcpus; /**< number of vCPUS */
91 struct channel_info channels[CHANNEL_MGR_MAX_CHANNELS]; /**< Array of channel_info */
92 unsigned num_channels; /**< Number of channels */
96 * Initialize the Channel Manager resources and connect to the Hypervisor
98 * This must be successfully called first before calling any other functions.
99 * It must only be call once;
102 * Must be a local path, e.g. qemu:///system.
106 * - Negative on error.
108 int channel_manager_init(const char *path);
111 * Free resources associated with the Channel Manager.
114 * Must be a local path, e.g. qemu:///system.
119 void channel_manager_exit(void);
122 * Get the Physical CPU mask for VM lcore channel(vcpu), result is assigned to
124 * It is not thread-safe.
127 * Pointer to struct channel_info
130 * The virtual CPU to query.
137 uint64_t get_pcpus_mask(struct channel_info *chan_info, unsigned vcpu);
140 * Set the Physical CPU mask for the specified vCPU.
141 * It is not thread-safe.
144 * Virtual Machine name to lookup
147 * The virtual CPU to set.
150 * The core mask of the physical CPU(s) to bind the vCPU
154 * - Negative on error.
156 int set_pcpus_mask(char *vm_name, unsigned vcpu, uint64_t core_mask);
159 * Set the Physical CPU for the specified vCPU.
160 * It is not thread-safe.
163 * Virtual Machine name to lookup
166 * The virtual CPU to set.
169 * The core number of the physical CPU(s) to bind the vCPU
173 * - Negative on error.
175 int set_pcpu(char *vm_name, unsigned vcpu, unsigned core_num);
177 * Add a VM as specified by name to the Channel Manager. The name must
178 * correspond to a valid libvirt domain name.
179 * This is required prior to adding channels.
180 * It is not thread-safe.
183 * Virtual Machine name to lookup.
187 * - Negative on error.
189 int add_vm(const char *name);
192 * Remove a previously added Virtual Machine from the Channel Manager
193 * It is not thread-safe.
196 * Virtual Machine name to lookup.
200 * - Negative on error.
202 int remove_vm(const char *name);
205 * Add all available channels to the VM as specified by name.
206 * Channels in the form of paths
207 * (CHANNEL_MGR_SOCKET_PATH/<vm_name>.<channel_number>) will only be parsed.
208 * It is not thread-safe.
211 * Virtual Machine name to lookup.
214 * - N the number of channels added for the VM
216 int add_all_channels(const char *vm_name);
219 * Add the channel numbers in channel_list to the domain specified by name.
220 * Channels in the form of paths
221 * (CHANNEL_MGR_SOCKET_PATH/<vm_name>.<channel_number>) will only be parsed.
222 * It is not thread-safe.
225 * Virtual Machine name to add channels.
227 * @param channel_list
228 * Pointer to list of unsigned integers, representing the channel number to add
229 * It must be allocated outside of this function.
231 * @param num_channels
232 * The amount of channel numbers in channel_list
235 * - N the number of channels added for the VM
238 int add_channels(const char *vm_name, unsigned *channel_list,
239 unsigned num_channels);
242 * Remove a channel definition from the channel manager. This must only be
243 * called from the channel monitor thread.
246 * Pointer to a valid struct channel_info.
250 * - Negative on error.
252 int remove_channel(struct channel_info **chan_info_dptr);
255 * For all channels associated with a Virtual Machine name, update the
256 * connection status. Valid states are CHANNEL_MGR_CHANNEL_CONNECTED or
257 * CHANNEL_MGR_CHANNEL_DISABLED only.
261 * Virtual Machine name to modify all channels.
264 * The status to set each channel
266 * @param num_channels
267 * The amount of channel numbers in channel_list
270 * - N the number of channels added for the VM
273 int set_channel_status_all(const char *name, enum channel_status status);
276 * For all channels in channel_list associated with a Virtual Machine name
277 * update the connection status of each.
278 * Valid states are CHANNEL_MGR_CHANNEL_CONNECTED or
279 * CHANNEL_MGR_CHANNEL_DISABLED only.
280 * It is not thread-safe.
283 * Virtual Machine name to add channels.
285 * @param channel_list
286 * Pointer to list of unsigned integers, representing the channel numbers to
288 * It must be allocated outside of this function.
290 * @param num_channels
291 * The amount of channel numbers in channel_list
294 * - N the number of channels modified for the VM
297 int set_channel_status(const char *vm_name, unsigned *channel_list,
298 unsigned len_channel_list, enum channel_status status);
301 * Populates a pointer to struct vm_info associated with vm_name.
304 * The name of the virtual machine to lookup.
307 * Pointer to a struct vm_info, this must be allocated prior to calling this
312 * - Negative on error.
314 int get_info_vm(const char *vm_name, struct vm_info *info);
320 #endif /* CHANNEL_MANAGER_H_ */