linux/fs/jffs2/summary.c

/*
 * JFFS2 -- Journalling Flash File System, Version 2.
 *
 * Copyright © 2004  Ferenc Havasi <[email protected]>,
 *		     Zoltan Sogor <[email protected]>,
 *		     Patrik Kluba <[email protected]>,
 *		     University of Szeged, Hungary
 *	       2006  KaiGai Kohei <[email protected]>
 *
 * For licensing information, see the file 'LICENCE' in this directory.
 *
 */

#define pr_fmt(fmt) …

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/mtd/mtd.h>
#include <linux/pagemap.h>
#include <linux/crc32.h>
#include <linux/compiler.h>
#include <linux/vmalloc.h>
#include "nodelist.h"
#include "debug.h"

int jffs2_sum_init(struct jffs2_sb_info *c)
{ … }

void jffs2_sum_exit(struct jffs2_sb_info *c)
{ … }

static int jffs2_sum_add_mem(struct jffs2_summary *s, union jffs2_sum_mem *item)
{ … }


/* The following 3 functions are called from scan.c to collect summary info for not closed jeb */

int jffs2_sum_add_padding_mem(struct jffs2_summary *s, uint32_t size)
{ … }

int jffs2_sum_add_inode_mem(struct jffs2_summary *s, struct jffs2_raw_inode *ri,
				uint32_t ofs)
{ … }

int jffs2_sum_add_dirent_mem(struct jffs2_summary *s, struct jffs2_raw_dirent *rd,
				uint32_t ofs)
{ … }

#ifdef CONFIG_JFFS2_FS_XATTR
int jffs2_sum_add_xattr_mem(struct jffs2_summary *s, struct jffs2_raw_xattr *rx, uint32_t ofs)
{ … }

int jffs2_sum_add_xref_mem(struct jffs2_summary *s, struct jffs2_raw_xref *rr, uint32_t ofs)
{ … }
#endif
/* Cleanup every collected summary information */

static void jffs2_sum_clean_collected(struct jffs2_summary *s)
{ … }

void jffs2_sum_reset_collected(struct jffs2_summary *s)
{ … }

void jffs2_sum_disable_collecting(struct jffs2_summary *s)
{ … }

int jffs2_sum_is_disabled(struct jffs2_summary *s)
{ … }

/* Move the collected summary information into sb (called from scan.c) */

void jffs2_sum_move_collected(struct jffs2_sb_info *c, struct jffs2_summary *s)
{ … }

/* Called from wbuf.c to collect writed node info */

int jffs2_sum_add_kvec(struct jffs2_sb_info *c, const struct kvec *invecs,
				unsigned long count, uint32_t ofs)
{ … }

static struct jffs2_raw_node_ref *sum_link_node_ref(struct jffs2_sb_info *c,
						    struct jffs2_eraseblock *jeb,
						    uint32_t ofs, uint32_t len,
						    struct jffs2_inode_cache *ic)
{ … }

/* Process the stored summary information - helper function for jffs2_sum_scan_sumnode() */

static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
				struct jffs2_raw_summary *summary, uint32_t *pseudo_random)
{ … }

/* Process the summary node - called from jffs2_scan_eraseblock() */
int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
			   struct jffs2_raw_summary *summary, uint32_t sumsize,
			   uint32_t *pseudo_random)
{ … }

/* Write summary data to flash - helper function for jffs2_sum_write_sumnode() */

static int jffs2_sum_write_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
				uint32_t infosize, uint32_t datasize, int padsize)
{ … }

/* Write out summary information - called from jffs2_do_reserve_space */

int jffs2_sum_write_sumnode(struct jffs2_sb_info *c)
	__must_hold(&c->erase_completion_block)
{ … }