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实现fat文件系统的truncate方法 (#428)
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@ -1511,6 +1511,17 @@ impl IndexNode for LockedFATInode {
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}
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}
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}
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}
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fn truncate(&self, len: usize) -> Result<(), SystemError> {
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let guard: SpinLockGuard<FATInode> = self.0.lock();
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let old_size = guard.metadata.size as usize;
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if len < old_size {
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drop(guard);
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self.resize(len)
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} else {
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Ok(())
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}
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}
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fn list(&self) -> Result<Vec<String>, SystemError> {
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fn list(&self) -> Result<Vec<String>, SystemError> {
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let mut guard: SpinLockGuard<FATInode> = self.0.lock();
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let mut guard: SpinLockGuard<FATInode> = self.0.lock();
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let fatent: &FATDirEntry = &guard.inode_type;
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let fatent: &FATDirEntry = &guard.inode_type;
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@ -357,6 +357,8 @@ pub const SYS_IOCTL: usize = 16;
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#[allow(dead_code)]
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#[allow(dead_code)]
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pub const SYS_WRITEV: usize = 20;
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pub const SYS_WRITEV: usize = 20;
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pub const SYS_MADVISE: usize = 28;
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pub const SYS_DUP: usize = 32;
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pub const SYS_DUP: usize = 32;
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pub const SYS_DUP2: usize = 33;
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pub const SYS_DUP2: usize = 33;
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@ -1128,6 +1130,11 @@ impl Syscall {
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Ok(0)
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Ok(0)
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}
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}
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SYS_MADVISE => {
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kwarn!("SYS_MADVISE has not yet been implemented");
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Ok(0)
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}
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_ => panic!("Unsupported syscall ID: {}", syscall_num),
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_ => panic!("Unsupported syscall ID: {}", syscall_num),
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};
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};
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return r;
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return r;
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