Group.c File Reference

#include "Mke2fs.h"

Include dependency graph for Group.c:

Go to the source code of this file.

Functions
int	test_root (int a, int b)
bool	ext2_bg_has_super (PEXT2_SUPER_BLOCK pExt2Sb, int group_block)
bool	ext2_allocate_group_desc (PEXT2_FILESYS Ext2Sys)
void	ext2_free_group_desc (PEXT2_FILESYS Ext2Sys)

Function Documentation

ext2_allocate_group_desc()

bool ext2_allocate_group_desc

(

PEXT2_FILESYS

Ext2Sys

)

Definition at line 43 of file Group.c.

{
    ULONG size;
 
    size = Ext2Sys->desc_blocks * Ext2Sys->blocksize;
 
    Ext2Sys->group_desc =
        (PEXT2_GROUP_DESC)RtlAllocateHeap(RtlGetProcessHeap(), 0, size);
 
    if (Ext2Sys->group_desc)
    {
        memset(Ext2Sys->group_desc, 0, size);
        return true;
    }
 
    return false;
}

Referenced by ext2_initialize_sb().

ext2_bg_has_super()

bool ext2_bg_has_super	(	PEXT2_SUPER_BLOCK	pExt2Sb,
		int	group_block
	)

Definition at line 30 of file Group.c.

{
    if (!(pExt2Sb->s_feature_ro_compat & EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER))
        return true;
 
    if (test_root(group_block, 3) || (test_root(group_block, 5)) ||
        test_root(group_block, 7))
        return true;
 
    return false;
}

Referenced by ext2_flush(), and ext2_initialize_sb().

ext2_free_group_desc()

void ext2_free_group_desc

(

PEXT2_FILESYS

Ext2Sys

)

Definition at line 61 of file Group.c.

{
    if (Ext2Sys->group_desc)
    {
        RtlFreeHeap(RtlGetProcessHeap(), 0, Ext2Sys->group_desc);
        Ext2Sys->group_desc = NULL;
    }
}

Referenced by ext2_initialize_sb(), and Ext2Format().

test_root()

int test_root	(	int	a,
		int	b
	)

Definition at line 16 of file Group.c.

{
    if (a == 0)
        return 1;
    while (1)
    {
        if (a == 1)
            return 1;
        if (a % b)
            return 0;
        a = a / b;
    }
}

Referenced by ext2_bg_has_super().