dev.c File Reference

#include "vfs/dev.h"
#include <hash.h>
#include <libk/serial.h>
#include <memory/memory_utils.h>
#include <memory/phys_base_allocator.h>
#include <memory/slab.h>
#include <str.h>
#include <type.h>

Go to the source code of this file.

Data Structures
struct	minor_map

Functions
static int32_t	alloc_minor (uint32_t major)
	__attribute__ ((used, visibility("default"), section(".export")))
	This function handles memory allocation for a new dentry using the slab allocator.

Variables
static cdev_ptr_t	dev_chain = 0
static struct slab_cache *	block_device_cache = 0
static struct minor_map	major_map [256] = {0}

Function Documentation

__attribute__()

__attribute__

(

(used, visibility("default"), section(".export"))

)

This function handles memory allocation for a new dentry using the slab allocator.

It also links the dentry to its corresponding VNode (if provided).

Note

This function performs lazy initialization of the dentry slab cache if it does not exist yet.

Parameters

name	The name of the file or directory.
vnode	Pointer to the associated VNode (inode data). Pass NULL if the VNode is not yet available.

Returns

dentry_ptr A pointer to the newly allocated and initialized dentry.

Definition at line 62 of file dev.c.

References alloc_minor(), block_device_cache, dev_chain, KERNEL_API, cdev::major, major, cdev::minor, minor, cdev::ops, ops, slab_free(), vxCreateSlabCache(), and vxSlabAlloc().

alloc_minor()

static int32_t alloc_minor ( uint32_t major )

static

Definition at line 39 of file dev.c.

References DEV_MINOR_BITMAP_COUNT, major, and major_map.

Referenced by __attribute__().

Variable Documentation

block_device_cache

struct slab_cache* block_device_cache = 0

static

Definition at line 31 of file dev.c.

Referenced by __attribute__().

dev_chain

cdev_ptr_t dev_chain = 0

static

Definition at line 30 of file dev.c.

Referenced by __attribute__().

major_map

struct minor_map major_map[256] = {0}

static

Definition at line 37 of file dev.c.

Referenced by alloc_minor().