Changes in uspace/lib/libc/generic/devmap.c [7fcb74c:1313ee9] in mainline

File:

• uspace/lib/libc/generic/devmap.c (modified) (10 diffs)

uspace/lib/libc/generic/devmap.c

@@ -35 +35 @@
 #include <async.h>
 #include <errno.h>
+#include <malloc.h>
+#include <bool.h>
 
 static int devmap_phone_driver = -1;
@@ -105 +107 @@
         aid_t req = async_send_2(phone, DEVMAP_DRIVER_REGISTER, 0, 0, &answer);
         
-        ipcarg_t retval = ipc_data_write_start(phone, name, str_size(name) + 1);
-        
+        ipcarg_t retval = async_data_write_start(phone, name, str_size(name));
         if (retval != EOK) {
                 async_wait_for(req, NULL);
@@ -126 +127 @@
 /** Register new device.
  *
- * @param name   Device name.
- * @param handle Output: Handle to the created instance of device.
+ * @param namespace Namespace name.
+ * @param fqdn      Fully qualified device name.
+ * @param handle    Output: Handle to the created instance of device.
  *
  */
-int devmap_device_register(const char *name, dev_handle_t *handle)
+int devmap_device_register(const char *fqdn, dev_handle_t *handle)
 {
         int phone = devmap_get_phone(DEVMAP_DRIVER, IPC_FLAG_BLOCKING);
@@ -143 +145 @@
             &answer);
         
-        ipcarg_t retval = ipc_data_write_start(phone, name, str_size(name) + 1);
-        
+        ipcarg_t retval = async_data_write_start(phone, fqdn, str_size(fqdn));
         if (retval != EOK) {
                 async_wait_for(req, NULL);
@@ -167 +168 @@
 }
 
-int devmap_device_get_handle(const char *name, dev_handle_t *handle, unsigned int flags)
+int devmap_device_get_handle(const char *fqdn, dev_handle_t *handle, unsigned int flags)
 {
         int phone = devmap_get_phone(DEVMAP_CLIENT, flags);
@@ -180 +181 @@
             &answer);
         
-        ipcarg_t retval = ipc_data_write_start(phone, name, str_size(name) + 1);
-        
+        ipcarg_t retval = async_data_write_start(phone, fqdn, str_size(fqdn));
         if (retval != EOK) {
                 async_wait_for(req, NULL);
@@ -202 +202 @@
         
         return retval;
+}
+
+int devmap_namespace_get_handle(const char *name, dev_handle_t *handle, unsigned int flags)
+{
+        int phone = devmap_get_phone(DEVMAP_CLIENT, flags);
+        
+        if (phone < 0)
+                return phone;
+        
+        async_serialize_start();
+        
+        ipc_call_t answer;
+        aid_t req = async_send_2(phone, DEVMAP_NAMESPACE_GET_HANDLE, flags, 0,
+            &answer);
+        
+        ipcarg_t retval = async_data_write_start(phone, name, str_size(name));
+        if (retval != EOK) {
+                async_wait_for(req, NULL);
+                async_serialize_end();
+                return retval;
+        }
+        
+        async_wait_for(req, &retval);
+        
+        async_serialize_end();
+        
+        if (retval != EOK) {
+                if (handle != NULL)
+                        *handle = (dev_handle_t) -1;
+                return retval;
+        }
+        
+        if (handle != NULL)
+                *handle = (dev_handle_t) IPC_GET_ARG1(answer);
+        
+        return retval;
+}
+
+devmap_handle_type_t devmap_handle_probe(dev_handle_t handle)
+{
+        int phone = devmap_get_phone(DEVMAP_CLIENT, IPC_FLAG_BLOCKING);
+        
+        if (phone < 0)
+                return phone;
+        
+        ipcarg_t type;
+        int retval = async_req_1_1(phone, DEVMAP_HANDLE_PROBE, handle, &type);
+        if (retval != EOK)
+                return DEV_HANDLE_NONE;
+        
+        return (devmap_handle_type_t) type;
 }
 
@@ -227 +278 @@
         
         ipcarg_t null_id;
-        int retval = async_req_0_1(phone, DEVMAP_DEVICE_NULL_CREATE, &null_id);
+        int retval = async_req_0_1(phone, DEVMAP_NULL_CREATE, &null_id);
         if (retval != EOK)
                 return -1;
@@ -241 +292 @@
                 return;
         
-        async_req_1_0(phone, DEVMAP_DEVICE_NULL_DESTROY, (ipcarg_t) null_id);
-}
-
-ipcarg_t devmap_device_get_count(void)
-{
-        int phone = devmap_get_phone(DEVMAP_CLIENT, IPC_FLAG_BLOCKING);
-        
-        if (phone < 0)
-                return 0;
-        
+        async_req_1_0(phone, DEVMAP_NULL_DESTROY, (ipcarg_t) null_id);
+}
+
+static size_t devmap_count_namespaces_internal(int phone)
+{
         ipcarg_t count;
-        int retval = async_req_0_1(phone, DEVMAP_DEVICE_GET_COUNT, &count);
+        int retval = async_req_0_1(phone, DEVMAP_GET_NAMESPACE_COUNT, &count);
         if (retval != EOK)
                 return 0;
@@ -259 +305 @@
 }
 
-ipcarg_t devmap_device_get_devices(ipcarg_t count, dev_desc_t *data)
-{
-        int phone = devmap_get_phone(DEVMAP_CLIENT, IPC_FLAG_BLOCKING);
-        
-        if (phone < 0)
-                return 0;
-        
-        async_serialize_start();
-        
-        ipc_call_t answer;
-        aid_t req = async_send_0(phone, DEVMAP_DEVICE_GET_DEVICES, &answer);
-        
-        ipcarg_t retval = ipc_data_read_start(phone, data, count * sizeof(dev_desc_t));
-        
-        if (retval != EOK) {
-                async_wait_for(req, NULL);
-                async_serialize_end();
-                return 0;
-        }
-        
-        async_wait_for(req, &retval);
-        
-        async_serialize_end();
-        
+static size_t devmap_count_devices_internal(int phone, dev_handle_t ns_handle)
+{
+        ipcarg_t count;
+        int retval = async_req_1_1(phone, DEVMAP_GET_DEVICE_COUNT, ns_handle, &count);
         if (retval != EOK)
                 return 0;
         
-        return IPC_GET_ARG1(answer);
-}
+        return count;
+}
+
+size_t devmap_count_namespaces(void)
+{
+        int phone = devmap_get_phone(DEVMAP_CLIENT, IPC_FLAG_BLOCKING);
+        
+        if (phone < 0)
+                return 0;
+        
+        return devmap_count_namespaces_internal(phone);
+}
+
+size_t devmap_count_devices(dev_handle_t ns_handle)
+{
+        int phone = devmap_get_phone(DEVMAP_CLIENT, IPC_FLAG_BLOCKING);
+        
+        if (phone < 0)
+                return 0;
+        
+        return devmap_count_devices_internal(phone, ns_handle);
+}
+
+size_t devmap_get_namespaces(dev_desc_t **data)
+{
+        int phone = devmap_get_phone(DEVMAP_CLIENT, IPC_FLAG_BLOCKING);
+        
+        if (phone < 0)
+                return 0;
+        
+        /* Loop until namespaces read succesful */
+        while (true) {
+                size_t count = devmap_count_namespaces_internal(phone);
+                if (count == 0)
+                        return 0;
+                
+                dev_desc_t *devs = (dev_desc_t *) calloc(count, sizeof(dev_desc_t));
+                if (devs == NULL)
+                        return 0;
+                
+                async_serialize_start();
+                
+                ipc_call_t answer;
+                aid_t req = async_send_0(phone, DEVMAP_GET_NAMESPACES, &answer);
+                
+                int rc = async_data_read_start(phone, devs, count * sizeof(dev_desc_t));
+                if (rc == EOVERFLOW) {
+                        /*
+                         * Number of namespaces has changed since
+                         * the last call of DEVMAP_DEVICE_GET_NAMESPACE_COUNT
+                         */
+                        async_serialize_end();
+                        free(devs);
+                        continue;
+                }
+                
+                if (rc != EOK) {
+                        async_wait_for(req, NULL);
+                        async_serialize_end();
+                        free(devs);
+                        return 0;
+                }
+                
+                ipcarg_t retval;
+                async_wait_for(req, &retval);
+                async_serialize_end();
+                
+                if (retval != EOK)
+                        return 0;
+                
+                *data = devs;
+                return count;
+        }
+}
+
+size_t devmap_get_devices(dev_handle_t ns_handle, dev_desc_t **data)
+{
+        int phone = devmap_get_phone(DEVMAP_CLIENT, IPC_FLAG_BLOCKING);
+        
+        if (phone < 0)
+                return 0;
+        
+        /* Loop until namespaces read succesful */
+        while (true) {
+                size_t count = devmap_count_devices_internal(phone, ns_handle);
+                if (count == 0)
+                        return 0;
+                
+                dev_desc_t *devs = (dev_desc_t *) calloc(count, sizeof(dev_desc_t));
+                if (devs == NULL)
+                        return 0;
+                
+                async_serialize_start();
+                
+                ipc_call_t answer;
+                aid_t req = async_send_1(phone, DEVMAP_GET_DEVICES, ns_handle, &answer);
+                
+                int rc = async_data_read_start(phone, devs, count * sizeof(dev_desc_t));
+                if (rc == EOVERFLOW) {
+                        /*
+                         * Number of devices has changed since
+                         * the last call of DEVMAP_DEVICE_GET_DEVICE_COUNT
+                         */
+                        async_serialize_end();
+                        free(devs);
+                        continue;
+                }
+                
+                if (rc != EOK) {
+                        async_wait_for(req, NULL);
+                        async_serialize_end();
+                        free(devs);
+                        return 0;
+                }
+                
+                ipcarg_t retval;
+                async_wait_for(req, &retval);
+                async_serialize_end();
+                
+                if (retval != EOK)
+                        return 0;
+                
+                *data = devs;
+                return count;
+        }
+}