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Move anonymous mapping emulation into own module under fs/mmap

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Signed-off-by: Jukka Laitinen <jukkax@ssrc.tii.ae>
This commit is contained in:
Jukka Laitinen
2023-01-09 12:02:24 +04:00
committed by Xiang Xiao
parent dd97900221
commit a5ed8014e8
5 changed files with 186 additions and 61 deletions
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fs/mmap/fs_mmap.c
+2 -59
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@@ -36,51 +36,12 @@
#include "inode/inode.h"
#include "fs_rammap.h"
#include "fs_anonmap.h"
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: unmap_anonymous
****************************************************************************/
static int unmap_anonymous(FAR struct task_group_s *group,
FAR struct mm_map_entry_s *entry,
FAR void *start,
size_t length)
{
int ret;
/* De-allocate memory.
* NB: This is incomplete anounymous mapping implementation
* see file_mmap_ below
*/
if (start == entry->vaddr && length == entry->length)
{
/* entry->priv marks allocation from kernel heap */
if (entry->priv.i)
{
kmm_free(start);
}
else
{
kumm_free(start);
}
ret = mm_map_remove(group, &entry);
}
else
{
ret = -EINVAL;
ferr("ERROR: Unknown map type\n");
}
return ret;
}
/****************************************************************************
* Name: file_mmap_
****************************************************************************/
@@ -164,25 +125,7 @@ static int file_mmap_(FAR struct file *filep, FAR void *start,
if ((flags & MAP_ANONYMOUS) != 0)
{
/* REVISIT: Should reside outside of the heap. That is really the
* only purpose of MAP_ANONYMOUS: To get non-heap memory. In KERNEL
* build, this could be accomplished using pgalloc(), provided that
* you had logic in place to assign a virtual address to the mapping.
*/
*mapped = kernel ? kmm_zalloc(length) : kumm_zalloc(length);
if (*mapped == NULL)
{
ferr("ERROR: kumm_alloc() failed, enable DEBUG_MM for info!\n");
return -ENOMEM;
}
entry.vaddr = *mapped;
entry.munmap = unmap_anonymous;
entry.priv.i = kernel;
mm_map_add(&entry);
return OK;
return map_anonymous(&entry, kernel);
}
if ((flags & MAP_PRIVATE) != 0)