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Kernel: Add STORAGE_DEVICE_GET_SIZE ioctl request
This ioctl request makes it possible to get the size of a storage device that has not yet been mounted.
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parent
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3b089032f4
Notes:
sideshowbarker
2024-07-18 03:20:18 +09:00
Author: https://github.com/Granddave Commit: https://github.com/SerenityOS/serenity/commit/3b089032f4b Pull-request: https://github.com/SerenityOS/serenity/pull/10401 Reviewed-by: https://github.com/supercomputer7
@ -10,6 +10,7 @@
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#include <Kernel/FileSystem/OpenFileDescription.h>
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#include <Kernel/Storage/StorageDevice.h>
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#include <Kernel/Storage/StorageManagement.h>
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#include <LibC/sys/ioctl_numbers.h>
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namespace Kernel {
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@ -187,4 +188,17 @@ bool StorageDevice::can_write(const OpenFileDescription&, size_t offset) const
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return offset < (max_addressable_block() * block_size());
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}
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KResult StorageDevice::ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg)
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{
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switch (request) {
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case STORAGE_DEVICE_GET_SIZE: {
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size_t disk_size = m_max_addressable_block * block_size();
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return copy_to_user(Userspace<size_t*>(arg), &disk_size);
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break;
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}
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default:
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return EINVAL;
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}
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}
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}
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@ -50,6 +50,9 @@ public:
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virtual CommandSet command_set() const = 0;
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// ^File
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virtual KResult ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg) final;
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protected:
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StorageDevice(int, int, size_t, u64, NonnullOwnPtr<KString>);
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// ^DiskDevice
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@ -88,7 +88,8 @@ enum IOCtlNumber {
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KCOV_ENABLE,
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KCOV_DISABLE,
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SOUNDCARD_IOCTL_SET_SAMPLE_RATE,
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SOUNDCARD_IOCTL_GET_SAMPLE_RATE
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SOUNDCARD_IOCTL_GET_SAMPLE_RATE,
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STORAGE_DEVICE_GET_SIZE,
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};
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#define TIOCGPGRP TIOCGPGRP
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@ -132,3 +133,4 @@ enum IOCtlNumber {
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#define FIONREAD FIONREAD
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#define SOUNDCARD_IOCTL_SET_SAMPLE_RATE SOUNDCARD_IOCTL_SET_SAMPLE_RATE
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#define SOUNDCARD_IOCTL_GET_SAMPLE_RATE SOUNDCARD_IOCTL_GET_SAMPLE_RATE
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#define STORAGE_DEVICE_GET_SIZE STORAGE_DEVICE_GET_SIZE
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