linux/fs/ocfs2/slot_map.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * slot_map.c
 *
 * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
 */

#include <linux/types.h>
#include <linux/slab.h>
#include <linux/highmem.h>

#include <cluster/masklog.h>

#include "ocfs2.h"

#include "dlmglue.h"
#include "extent_map.h"
#include "heartbeat.h"
#include "inode.h"
#include "slot_map.h"
#include "super.h"
#include "sysfile.h"
#include "ocfs2_trace.h"

#include "buffer_head_io.h"


struct ocfs2_slot { … };

struct ocfs2_slot_info { … };


static int __ocfs2_node_num_to_slot(struct ocfs2_slot_info *si,
				    unsigned int node_num);

static void ocfs2_invalidate_slot(struct ocfs2_slot_info *si,
				  int slot_num)
{ … }

static void ocfs2_set_slot(struct ocfs2_slot_info *si,
			   int slot_num, unsigned int node_num)
{ … }

/* This version is for the extended slot map */
static void ocfs2_update_slot_info_extended(struct ocfs2_slot_info *si)
{ … }

/*
 * Post the slot information on disk into our slot_info struct.
 * Must be protected by osb_lock.
 */
static void ocfs2_update_slot_info_old(struct ocfs2_slot_info *si)
{ … }

static void ocfs2_update_slot_info(struct ocfs2_slot_info *si)
{ … }

int ocfs2_refresh_slot_info(struct ocfs2_super *osb)
{ … }

/* post the our slot info stuff into it's destination bh and write it
 * out. */
static void ocfs2_update_disk_slot_extended(struct ocfs2_slot_info *si,
					    int slot_num,
					    struct buffer_head **bh)
{ … }

static void ocfs2_update_disk_slot_old(struct ocfs2_slot_info *si,
				       int slot_num,
				       struct buffer_head **bh)
{ … }

static int ocfs2_update_disk_slot(struct ocfs2_super *osb,
				  struct ocfs2_slot_info *si,
				  int slot_num)
{ … }

/*
 * Calculate how many bytes are needed by the slot map.  Returns
 * an error if the slot map file is too small.
 */
static int ocfs2_slot_map_physical_size(struct ocfs2_super *osb,
					struct inode *inode,
					unsigned long long *bytes)
{ … }

/* try to find global node in the slot info. Returns -ENOENT
 * if nothing is found. */
static int __ocfs2_node_num_to_slot(struct ocfs2_slot_info *si,
				    unsigned int node_num)
{ … }

static int __ocfs2_find_empty_slot(struct ocfs2_slot_info *si,
				   int preferred)
{ … }

int ocfs2_node_num_to_slot(struct ocfs2_super *osb, unsigned int node_num)
{ … }

int ocfs2_slot_to_node_num_locked(struct ocfs2_super *osb, int slot_num,
				  unsigned int *node_num)
{ … }

static void __ocfs2_free_slot_info(struct ocfs2_slot_info *si)
{ … }

int ocfs2_clear_slot(struct ocfs2_super *osb, int slot_num)
{ … }

static int ocfs2_map_slot_buffers(struct ocfs2_super *osb,
				  struct ocfs2_slot_info *si)
{ … }

int ocfs2_init_slot_info(struct ocfs2_super *osb)
{ … }

void ocfs2_free_slot_info(struct ocfs2_super *osb)
{ … }

int ocfs2_find_slot(struct ocfs2_super *osb)
{ … }

void ocfs2_put_slot(struct ocfs2_super *osb)
{ … }