2028d6386c
Change-Id: Ib08a1e196441f35550fe221b912332b4803a04b4 Reviewed-on: https://review.haiku-os.org/c/haiku/+/3641 Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>
72 lines
1.5 KiB
C
72 lines
1.5 KiB
C
/*
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* Copyright 2013, Axel Dörfler, axeld@pinc-software.de.
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* Distributed under the terms of the MIT license.
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*/
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#ifndef _FS_TRIM_SUPPORT_H
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#define _FS_TRIM_SUPPORT_H
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#include <AutoDeleter.h>
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#include <KernelExport.h>
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#include <SupportDefs.h>
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#include <kernel.h>
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#include <syscall_restart.h>
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static inline status_t
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get_trim_data_from_user(void* buffer, size_t size, MemoryDeleter& deleter,
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fs_trim_data*& _trimData)
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{
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if (!is_called_via_syscall() && !IS_USER_ADDRESS(buffer)) {
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// Called from kernel
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_trimData = (fs_trim_data*)buffer;
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return B_OK;
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}
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// Called from userland
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if (!IS_USER_ADDRESS(buffer))
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return B_BAD_ADDRESS;
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uint32 count;
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if (user_memcpy(&count, buffer, sizeof(count)) != B_OK)
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return B_BAD_ADDRESS;
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size_t bytes = (count - 1) * sizeof(uint64) * 2 + sizeof(fs_trim_data);
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if (bytes > size)
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return B_BAD_VALUE;
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void* trimBuffer = malloc(bytes);
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if (trimBuffer == NULL)
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return B_NO_MEMORY;
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if (user_memcpy(trimBuffer, buffer, bytes) != B_OK) {
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free(trimBuffer);
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return B_BAD_ADDRESS;
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}
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// The passed in MemoryDeleter needs to take care of freeing the buffer
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// later, since we had to allocate it.
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deleter.SetTo(trimBuffer);
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_trimData = (fs_trim_data*)trimBuffer;
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return B_OK;
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}
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static inline status_t
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copy_trim_data_to_user(void* buffer, fs_trim_data* trimData)
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{
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if (!is_called_via_syscall() && !IS_USER_ADDRESS(buffer))
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return B_OK;
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if (!IS_USER_ADDRESS(buffer))
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return B_BAD_ADDRESS;
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// Do not copy any ranges
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return user_memcpy(buffer, trimData, sizeof(uint64) * 2);
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}
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#endif // _FS_TRIM_SUPPORT_H
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