3 * Device Filesystem (DevFS)
13 int DevFS_AddDevice(tDevFS_Driver *Device);
14 void DevFS_DelDevice(tDevFS_Driver *Device);
16 tVFS_Node *DevFS_InitDevice(const char *Device, const char **Options);
17 char *DevFS_ReadDir(tVFS_Node *Node, int Pos);
18 tVFS_Node *DevFS_FindDir(tVFS_Node *Node, const char *Name);
21 tVFS_Driver gDevFS_Info = {
22 "devfs", 0, DevFS_InitDevice, NULL, NULL
24 tVFS_NodeType gDevFS_DirType = {
25 .TypeName = "DevFS-Dir",
26 .ReadDir = DevFS_ReadDir,
27 .FindDir = DevFS_FindDir
29 tVFS_Node gDevFS_RootNode = {
31 .Flags = VFS_FFLAG_DIRECTORY,
33 .ACLs = &gVFS_ACL_EveryoneRX,
34 .Type = &gDevFS_DirType
36 tDevFS_Driver *gDevFS_Drivers = NULL;
37 int giDevFS_NextID = 1;
38 tShortSpinlock glDevFS_ListLock;
42 * \fn int DevFS_AddDevice(tDevFS_Driver *Device)
44 int DevFS_AddDevice(tDevFS_Driver *Device)
49 ENTER("pDevice", Device);
50 LOG("Device->Name = '%s'", Device->Name);
52 SHORTLOCK( &glDevFS_ListLock );
54 // Check if the device is already registered or the name is taken
55 for( dev = gDevFS_Drivers; dev; dev = dev->Next )
57 if(dev == Device) break;
58 if(strcmp(dev->Name, Device->Name) == 0) break;
63 Log_Warning("DevFS", "Device %p '%s' attempted to register itself twice",
66 Log_Warning("DevFS", "Device %p attempted to register '%s' which was owned by %p",
67 Device, dev->Name, dev);
71 Device->Next = gDevFS_Drivers;
72 gDevFS_Drivers = Device;
73 gDevFS_RootNode.Size ++;
74 ret = giDevFS_NextID ++;
76 SHORTREL( &glDevFS_ListLock );
83 * \brief Delete a device from the DevFS folder
85 void DevFS_DelDevice(tDevFS_Driver *Device)
87 tDevFS_Driver *prev = NULL, *dev;
89 SHORTLOCK( &glDevFS_ListLock );
90 // Search list for device
91 for(dev = gDevFS_Drivers;
93 prev = dev, dev = dev->Next
96 // Check if it was found
100 prev->Next = Device->Next;
102 gDevFS_Drivers = Device->Next;
105 Log_Warning("DevFS", "Attempted to unregister device %p '%s' which was not registered",
106 Device, Device->Name);
108 SHORTREL( &glDevFS_ListLock );
112 * \brief Initialise the DevFS and detect double-mounting, or just do nothing
115 tVFS_Node *DevFS_InitDevice(const char *Device, const char **Options)
117 return &gDevFS_RootNode;
121 * \fn char *DevFS_ReadDir(tVFS_Node *Node, int Pos)
123 char *DevFS_ReadDir(tVFS_Node *Node, int Pos)
127 if(Pos < 0) return NULL;
129 for(dev = gDevFS_Drivers;
135 return strdup(dev->Name);
141 * \fn tVFS_Node *DevFS_FindDir(tVFS_Node *Node, const char *Name)
142 * \brief Get an entry from the devices directory
144 tVFS_Node *DevFS_FindDir(tVFS_Node *Node, const char *Name)
148 ENTER("pNode sName", Node, Name);
150 for(dev = gDevFS_Drivers;
155 //LOG("dev = %p", dev);
156 LOG("dev->Name = '%s'", dev->Name);
157 if(strcmp(dev->Name, Name) == 0) {
158 LEAVE('p', &dev->RootNode);
159 return &dev->RootNode;
168 EXPORT(DevFS_AddDevice);
169 EXPORT(DevFS_DelDevice);