dentry.c File Reference

#include <hash.h>
#include <llist.h>
#include <str.h>
#include <string.h>
#include <type.h>
#include <vector.h>
#include <vfs/dentry.h>
#include "libk/serial.h"
#include "memory/kalloc.h"
#include "memory/slab.h"
#include "vfs/cache.h"
#include "vfs/dev.h"
#include "vfs/enum.h"
#include "vfs/rcu.h"
#include "vfs/vnode.h"
#include <spinlock.h>

Go to the source code of this file.

Functions
uint32_t	hash_dentry (const char *name, dentry_ptr parent)
dentry_ptr	__attribute__ ((used, visibility("default"), section(".export")))
	This function handles memory allocation for a new dentry using the slab allocator.
static void	dentry_free_rcu (struct rcu_head *head)
void	dentry_get (dentry_ptr dentry)
void	dentry_put (dentry_ptr dentry)
void	vxSetDentryAsRoot (dentry_ptr dentry)
void	delete_dentry (dentry_t *node)
void	print_dentry_tree (dentry_t *dentry, int depth)
int	get_reffcount (dentry_ptr dentry)
kstring	get_full_path_from_dentry (dentry_ptr dentry)

Variables
static struct slab_cache *	dentry_cache = 0
static dentry_t *	root_dentry = 0
static spinlock_t	lock = {0}

Function Documentation

__attribute__()

dentry_ptr __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 36 of file dentry.c.

References dentry::child_list, atomic_t::counter, hlist_node::dentry, dentry_cache, dentry::hash, hash_dentry(), dentry::hash_node, KERNEL_API, llist_init(), lock, memset(), dentry::name, name, hlist_node::next, dentry::parent, parent, hlist_node::prev, dentry::refcount, spin_acquire(), spin_release(), dentry::vnode, vxCreateSlabCache(), and vxSlabAlloc().

delete_dentry()

void delete_dentry

(

dentry_t *

node

)

Definition at line 268 of file dentry.c.

References cache_remove(), dentry::child_list, container_of, delete_dentry(), dentry_put(), get_root_cache(), kalloc(), kfree(), llist_head::next, NULL, and pos.

Referenced by delete_dentry().

dentry_free_rcu()

static void dentry_free_rcu ( struct rcu_head * head )

static

Definition at line 63 of file dentry.c.

References container_of, dentry_cache, head, rcu, and slab_free().

Referenced by dentry_put().

dentry_get()

void dentry_get

(

dentry_ptr

dentry

)

Definition at line 68 of file dentry.c.

References atomic_t::counter, and dentry::refcount.

Referenced by vfs_umount().

dentry_put()

void dentry_put

(

dentry_ptr

dentry

)

Definition at line 72 of file dentry.c.

References call_rcu(), atomic_t::counter, dentry_free_rcu(), dentry::rcu, and dentry::refcount.

Referenced by __attribute__(), delete_dentry(), execve(), vfs_umount(), vfs_umount_recursive(), and vxVoxmoInstall().

get_full_path_from_dentry()

kstring get_full_path_from_dentry

(

dentry_ptr

dentry

)

Definition at line 356 of file dentry.c.

References kstring::c_str, dentry::name, NULL, dentry::parent, str(), str_concat(), str_concat_prefix(), and str_release().

Referenced by __attribute__(), and print_dentry_tree().

get_reffcount()

int get_reffcount

(

dentry_ptr

dentry

)

Definition at line 352 of file dentry.c.

References atomic_t::counter, and dentry::refcount.

Referenced by vfs_umount_recursive().

hash_dentry()

uint32_t hash_dentry ( const char * name, dentry_ptr parent )

inline

Definition at line 24 of file dentry.c.

References h, hash32(), name, and parent.

Referenced by __attribute__(), and cache_lookup().

print_dentry_tree()

void print_dentry_tree	(	dentry_t *	dentry,
		int	depth )

Definition at line 300 of file dentry.c.

References fs_instance::block_dentry, kstring::c_str, dentry::child_list, container_of, atomic_t::counter, vnode::device, fs_instance::fs, vnode::fs_instance, get_full_path_from_dentry(), dentry::hash, device_id::major, device_id::minor, vnode::mountedhere, dentry::name, filesystem::name, llist_head::next, vnode::permission, pos, print_dentry_tree(), dentry::refcount, serial2_printf(), str_release(), vnode::type, dentry::vnode, VNODE_TYPE_BLK, and VNODE_TYPE_CHR.

Referenced by __attribute__(), execve(), and print_dentry_tree().

vxSetDentryAsRoot()

void vxSetDentryAsRoot

(

dentry_ptr

dentry

)

Definition at line 84 of file dentry.c.

References root_dentry.

Referenced by INIT().

Variable Documentation

dentry_cache

struct slab_cache* dentry_cache = 0

static

Definition at line 21 of file dentry.c.

Referenced by __attribute__(), and dentry_free_rcu().

lock

spinlock_t lock = {0}

static

Definition at line 34 of file dentry.c.

root_dentry

dentry_t* root_dentry = 0

static

Definition at line 22 of file dentry.c.

Referenced by vxSetDentryAsRoot().