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Kernel: Expose device presence in /sys/dev/char and /sys/dev/block
These files are not marked as block devices or character devices so they are not meant to be used as device nodes. The filenames are formatted to the pattern "major:minor", but a Userland program need to call the parse these format and inspect the the major and minor numbers and create the real device nodes in /dev. Later on, it might be a good idea to ensure we don't create new SysFSComponents on the heap for each Device, but rather generate them only when required (and preferably to not create a SysFSComponent at all if possible).
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5 changed files with 183 additions and 2 deletions
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@ -6,6 +6,7 @@
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#include <AK/Singleton.h>
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#include <AK/StringView.h>
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#include <Kernel/Devices/Device.h>
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#include <Kernel/FileSystem/SysFS.h>
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#include <Kernel/Sections.h>
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@ -35,6 +36,11 @@ UNMAP_AFTER_INIT void SysFSComponentRegistry::register_new_component(SysFSCompon
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m_root_directory->m_components.append(component);
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}
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SysFSComponentRegistry::DevicesList& SysFSComponentRegistry::devices_list()
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{
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return m_devices_list;
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}
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NonnullRefPtr<SysFSRootDirectory> SysFSRootDirectory::create()
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{
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return adopt_ref(*new (nothrow) SysFSRootDirectory);
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@ -57,7 +63,9 @@ SysFSRootDirectory::SysFSRootDirectory()
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: SysFSDirectory(".")
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{
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auto buses_directory = SysFSBusDirectory::must_create(*this);
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auto devices_directory = SysFSDevicesDirectory::must_create(*this);
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m_components.append(buses_directory);
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m_components.append(devices_directory);
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m_buses_directory = buses_directory;
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}
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