1 use crate::filesystem::devfs::{DevFS, DeviceINode}; 2 use crate::filesystem::vfs::{ 3 core::generate_inode_id, make_rawdev, FilePrivateData, FileSystem, FileType, IndexNode, 4 Metadata, PollStatus, 5 }; 6 use crate::io::device::BlockDevice; 7 use crate::{ 8 include::bindings::bindings::{EINVAL, ENOTSUP}, 9 libs::spinlock::SpinLock, 10 time::TimeSpec, 11 }; 12 use alloc::{ 13 string::String, 14 sync::{Arc, Weak}, 15 vec::Vec, 16 }; 17 18 use super::ahcidisk::LockedAhciDisk; 19 20 #[derive(Debug)] 21 pub struct AhciInode { 22 /// uuid 暂时不知道有什么用（x 23 // uuid: Uuid, 24 /// 指向自身的弱引用 25 self_ref: Weak<LockedAhciInode>, 26 /// 指向inode所在的文件系统对象的指针 27 fs: Weak<DevFS>, 28 /// INode 元数据 29 metadata: Metadata, 30 /// INode 对应的磁盘 31 disk: Arc<LockedAhciDisk>, 32 } 33 34 #[derive(Debug)] 35 pub struct LockedAhciInode(pub SpinLock<AhciInode>); 36 37 impl LockedAhciInode { 38 pub fn new(disk: Arc<LockedAhciDisk>) -> Arc<Self> { 39 let inode = AhciInode { 40 // uuid: Uuid::new_v5(), 41 self_ref: Weak::default(), 42 fs: Weak::default(), 43 disk: disk, 44 metadata: Metadata { 45 dev_id: 1, 46 inode_id: generate_inode_id(), 47 size: 0, 48 blk_size: 0, 49 blocks: 0, 50 atime: TimeSpec::default(), 51 mtime: TimeSpec::default(), 52 ctime: TimeSpec::default(), 53 file_type: FileType::BlockDevice, // 文件夹，block设备，char设备 54 mode: 0o666, 55 nlinks: 1, 56 uid: 0, 57 gid: 0, 58 raw_dev: make_rawdev(1, 3), // 这里用来作为device number 59 }, 60 }; 61 62 let result = Arc::new(LockedAhciInode(SpinLock::new(inode))); 63 result.0.lock().self_ref = Arc::downgrade(&result); 64 65 return result; 66 } 67 } 68 69 impl DeviceINode for LockedAhciInode { 70 fn set_fs(&self, fs: Weak<DevFS>) { 71 self.0.lock().fs = fs; 72 } 73 } 74 75 impl IndexNode for LockedAhciInode { 76 fn as_any_ref(&self) -> &dyn core::any::Any { 77 self 78 } 79 80 fn open(&self, _data: &mut FilePrivateData) -> Result<(), i32> { 81 Err(-(ENOTSUP as i32)) 82 } 83 84 fn close(&self, _data: &mut FilePrivateData) -> Result<(), i32> { 85 Err(-(ENOTSUP as i32)) 86 } 87 88 fn metadata(&self) -> Result<Metadata, i32> { 89 return Ok(self.0.lock().metadata.clone()); 90 } 91 92 fn fs(&self) -> Arc<dyn FileSystem> { 93 return self.0.lock().fs.upgrade().unwrap(); 94 } 95 96 fn list(&self) -> Result<Vec<String>, i32> { 97 Err(-(ENOTSUP as i32)) 98 } 99 100 fn set_metadata(&self, metadata: &Metadata) -> Result<(), i32> { 101 let mut inode = self.0.lock(); 102 inode.metadata.atime = metadata.atime; 103 inode.metadata.mtime = metadata.mtime; 104 inode.metadata.ctime = metadata.ctime; 105 inode.metadata.mode = metadata.mode; 106 inode.metadata.uid = metadata.uid; 107 inode.metadata.gid = metadata.gid; 108 109 return Ok(()); 110 } 111 112 fn poll(&self) -> Result<PollStatus, i32> { 113 return Ok(PollStatus { 114 flags: PollStatus::READ_MASK | PollStatus::WRITE_MASK, 115 }); 116 } 117 118 /// 读设备 - 应该调用设备的函数读写，而不是通过文件系统读写 119 fn read_at( 120 &self, 121 offset: usize, // lba地址 122 len: usize, 123 buf: &mut [u8], 124 data: &mut FilePrivateData, 125 ) -> Result<usize, i32> { 126 if buf.len() < len { 127 return Err(-(EINVAL as i32)); 128 } 129 130 if let FilePrivateData::Unused = data { 131 return self.0.lock().disk.read_at(offset, len, buf); 132 } 133 134 return Err(-(EINVAL as i32)); 135 } 136 137 /// 写设备 - 应该调用设备的函数读写，而不是通过文件系统读写 138 fn write_at( 139 &self, 140 offset: usize, // lba地址 141 len: usize, 142 buf: &[u8], 143 data: &mut FilePrivateData, 144 ) -> Result<usize, i32> { 145 if buf.len() < len { 146 return Err(-(EINVAL as i32)); 147 } 148 149 if let FilePrivateData::Unused = data { 150 return self.0.lock().disk.write_at(offset, len, buf); 151 } 152 153 return Err(-(EINVAL as i32)); 154 } 155 } 156