![David Woodhouse](/assets/img/avatar_default.png)
Also, make sure dirents are marked REF_UNCHECKED when we 'discover' them through eraseblock summary. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
853 lines
23 KiB
C
853 lines
23 KiB
C
/*
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* JFFS2 -- Journalling Flash File System, Version 2.
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*
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* Copyright (C) 2004 Ferenc Havasi <havasi@inf.u-szeged.hu>,
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* Zoltan Sogor <weth@inf.u-szeged.hu>,
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* Patrik Kluba <pajko@halom.u-szeged.hu>,
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* University of Szeged, Hungary
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* 2005 KaiGai Kohei <kaigai@ak.jp.nec.com>
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*
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* For licensing information, see the file 'LICENCE' in this directory.
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*
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* $Id: summary.c,v 1.4 2005/09/26 11:37:21 havasi Exp $
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*
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*/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/mtd/mtd.h>
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#include <linux/pagemap.h>
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#include <linux/crc32.h>
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#include <linux/compiler.h>
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#include <linux/vmalloc.h>
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#include "nodelist.h"
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#include "debug.h"
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int jffs2_sum_init(struct jffs2_sb_info *c)
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{
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c->summary = kmalloc(sizeof(struct jffs2_summary), GFP_KERNEL);
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if (!c->summary) {
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JFFS2_WARNING("Can't allocate memory for summary information!\n");
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return -ENOMEM;
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}
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memset(c->summary, 0, sizeof(struct jffs2_summary));
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c->summary->sum_buf = vmalloc(c->sector_size);
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if (!c->summary->sum_buf) {
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JFFS2_WARNING("Can't allocate buffer for writing out summary information!\n");
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kfree(c->summary);
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return -ENOMEM;
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}
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dbg_summary("returned succesfully\n");
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return 0;
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}
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void jffs2_sum_exit(struct jffs2_sb_info *c)
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{
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dbg_summary("called\n");
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jffs2_sum_disable_collecting(c->summary);
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vfree(c->summary->sum_buf);
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c->summary->sum_buf = NULL;
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kfree(c->summary);
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c->summary = NULL;
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}
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static int jffs2_sum_add_mem(struct jffs2_summary *s, union jffs2_sum_mem *item)
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{
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if (!s->sum_list_head)
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s->sum_list_head = (union jffs2_sum_mem *) item;
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if (s->sum_list_tail)
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s->sum_list_tail->u.next = (union jffs2_sum_mem *) item;
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s->sum_list_tail = (union jffs2_sum_mem *) item;
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switch (je16_to_cpu(item->u.nodetype)) {
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case JFFS2_NODETYPE_INODE:
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s->sum_size += JFFS2_SUMMARY_INODE_SIZE;
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s->sum_num++;
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dbg_summary("inode (%u) added to summary\n",
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je32_to_cpu(item->i.inode));
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break;
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case JFFS2_NODETYPE_DIRENT:
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s->sum_size += JFFS2_SUMMARY_DIRENT_SIZE(item->d.nsize);
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s->sum_num++;
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dbg_summary("dirent (%u) added to summary\n",
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je32_to_cpu(item->d.ino));
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break;
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#ifdef CONFIG_JFFS2_FS_XATTR
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case JFFS2_NODETYPE_XATTR:
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s->sum_size += JFFS2_SUMMARY_XATTR_SIZE;
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s->sum_num++;
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dbg_summary("xattr (xid=%u, version=%u) added to summary\n",
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je32_to_cpu(item->x.xid), je32_to_cpu(item->x.version));
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break;
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case JFFS2_NODETYPE_XREF:
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s->sum_size += JFFS2_SUMMARY_XREF_SIZE;
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s->sum_num++;
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dbg_summary("xref added to summary\n");
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break;
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#endif
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default:
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JFFS2_WARNING("UNKNOWN node type %u\n",
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je16_to_cpu(item->u.nodetype));
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return 1;
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}
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return 0;
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}
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/* The following 3 functions are called from scan.c to collect summary info for not closed jeb */
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int jffs2_sum_add_padding_mem(struct jffs2_summary *s, uint32_t size)
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{
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dbg_summary("called with %u\n", size);
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s->sum_padded += size;
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return 0;
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}
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int jffs2_sum_add_inode_mem(struct jffs2_summary *s, struct jffs2_raw_inode *ri,
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uint32_t ofs)
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{
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struct jffs2_sum_inode_mem *temp = kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL);
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if (!temp)
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return -ENOMEM;
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temp->nodetype = ri->nodetype;
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temp->inode = ri->ino;
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temp->version = ri->version;
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temp->offset = cpu_to_je32(ofs); /* relative offset from the begining of the jeb */
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temp->totlen = ri->totlen;
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temp->next = NULL;
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return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp);
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}
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int jffs2_sum_add_dirent_mem(struct jffs2_summary *s, struct jffs2_raw_dirent *rd,
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uint32_t ofs)
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{
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struct jffs2_sum_dirent_mem *temp =
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kmalloc(sizeof(struct jffs2_sum_dirent_mem) + rd->nsize, GFP_KERNEL);
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if (!temp)
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return -ENOMEM;
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temp->nodetype = rd->nodetype;
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temp->totlen = rd->totlen;
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temp->offset = cpu_to_je32(ofs); /* relative from the begining of the jeb */
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temp->pino = rd->pino;
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temp->version = rd->version;
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temp->ino = rd->ino;
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temp->nsize = rd->nsize;
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temp->type = rd->type;
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temp->next = NULL;
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memcpy(temp->name, rd->name, rd->nsize);
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return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp);
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}
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#ifdef CONFIG_JFFS2_FS_XATTR
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int jffs2_sum_add_xattr_mem(struct jffs2_summary *s, struct jffs2_raw_xattr *rx, uint32_t ofs)
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{
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struct jffs2_sum_xattr_mem *temp;
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temp = kmalloc(sizeof(struct jffs2_sum_xattr_mem), GFP_KERNEL);
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if (!temp)
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return -ENOMEM;
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temp->nodetype = rx->nodetype;
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temp->xid = rx->xid;
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temp->version = rx->version;
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temp->offset = cpu_to_je32(ofs);
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temp->totlen = rx->totlen;
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temp->next = NULL;
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return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp);
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}
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int jffs2_sum_add_xref_mem(struct jffs2_summary *s, struct jffs2_raw_xref *rr, uint32_t ofs)
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{
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struct jffs2_sum_xref_mem *temp;
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temp = kmalloc(sizeof(struct jffs2_sum_xref_mem), GFP_KERNEL);
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if (!temp)
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return -ENOMEM;
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temp->nodetype = rr->nodetype;
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temp->offset = cpu_to_je32(ofs);
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temp->next = NULL;
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return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp);
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}
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#endif
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/* Cleanup every collected summary information */
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static void jffs2_sum_clean_collected(struct jffs2_summary *s)
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{
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union jffs2_sum_mem *temp;
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if (!s->sum_list_head) {
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dbg_summary("already empty\n");
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}
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while (s->sum_list_head) {
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temp = s->sum_list_head;
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s->sum_list_head = s->sum_list_head->u.next;
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kfree(temp);
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}
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s->sum_list_tail = NULL;
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s->sum_padded = 0;
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s->sum_num = 0;
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}
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void jffs2_sum_reset_collected(struct jffs2_summary *s)
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{
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dbg_summary("called\n");
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jffs2_sum_clean_collected(s);
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s->sum_size = 0;
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}
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void jffs2_sum_disable_collecting(struct jffs2_summary *s)
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{
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dbg_summary("called\n");
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jffs2_sum_clean_collected(s);
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s->sum_size = JFFS2_SUMMARY_NOSUM_SIZE;
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}
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int jffs2_sum_is_disabled(struct jffs2_summary *s)
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{
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return (s->sum_size == JFFS2_SUMMARY_NOSUM_SIZE);
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}
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/* Move the collected summary information into sb (called from scan.c) */
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void jffs2_sum_move_collected(struct jffs2_sb_info *c, struct jffs2_summary *s)
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{
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dbg_summary("oldsize=0x%x oldnum=%u => newsize=0x%x newnum=%u\n",
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c->summary->sum_size, c->summary->sum_num,
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s->sum_size, s->sum_num);
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c->summary->sum_size = s->sum_size;
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c->summary->sum_num = s->sum_num;
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c->summary->sum_padded = s->sum_padded;
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c->summary->sum_list_head = s->sum_list_head;
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c->summary->sum_list_tail = s->sum_list_tail;
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s->sum_list_head = s->sum_list_tail = NULL;
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}
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/* Called from wbuf.c to collect writed node info */
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int jffs2_sum_add_kvec(struct jffs2_sb_info *c, const struct kvec *invecs,
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unsigned long count, uint32_t ofs)
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{
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union jffs2_node_union *node;
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struct jffs2_eraseblock *jeb;
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node = invecs[0].iov_base;
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jeb = &c->blocks[ofs / c->sector_size];
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ofs -= jeb->offset;
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switch (je16_to_cpu(node->u.nodetype)) {
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case JFFS2_NODETYPE_INODE: {
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struct jffs2_sum_inode_mem *temp =
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kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL);
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if (!temp)
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goto no_mem;
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temp->nodetype = node->i.nodetype;
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temp->inode = node->i.ino;
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temp->version = node->i.version;
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temp->offset = cpu_to_je32(ofs);
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temp->totlen = node->i.totlen;
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temp->next = NULL;
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return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp);
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}
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case JFFS2_NODETYPE_DIRENT: {
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struct jffs2_sum_dirent_mem *temp =
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kmalloc(sizeof(struct jffs2_sum_dirent_mem) + node->d.nsize, GFP_KERNEL);
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if (!temp)
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goto no_mem;
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temp->nodetype = node->d.nodetype;
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temp->totlen = node->d.totlen;
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temp->offset = cpu_to_je32(ofs);
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temp->pino = node->d.pino;
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temp->version = node->d.version;
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temp->ino = node->d.ino;
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temp->nsize = node->d.nsize;
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temp->type = node->d.type;
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temp->next = NULL;
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switch (count) {
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case 1:
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memcpy(temp->name,node->d.name,node->d.nsize);
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break;
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case 2:
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memcpy(temp->name,invecs[1].iov_base,node->d.nsize);
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break;
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default:
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BUG(); /* impossible count value */
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break;
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}
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return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp);
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}
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#ifdef CONFIG_JFFS2_FS_XATTR
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case JFFS2_NODETYPE_XATTR: {
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struct jffs2_sum_xattr_mem *temp;
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if (je32_to_cpu(node->x.version) == 0xffffffff)
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return 0;
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temp = kmalloc(sizeof(struct jffs2_sum_xattr_mem), GFP_KERNEL);
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if (!temp)
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goto no_mem;
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temp->nodetype = node->x.nodetype;
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temp->xid = node->x.xid;
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temp->version = node->x.version;
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temp->totlen = node->x.totlen;
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temp->offset = cpu_to_je32(ofs);
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temp->next = NULL;
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return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp);
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}
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case JFFS2_NODETYPE_XREF: {
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struct jffs2_sum_xref_mem *temp;
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if (je32_to_cpu(node->r.ino) == 0xffffffff
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&& je32_to_cpu(node->r.xid) == 0xffffffff)
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return 0;
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temp = kmalloc(sizeof(struct jffs2_sum_xref_mem), GFP_KERNEL);
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if (!temp)
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goto no_mem;
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temp->nodetype = node->r.nodetype;
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temp->offset = cpu_to_je32(ofs);
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temp->next = NULL;
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return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp);
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}
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#endif
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case JFFS2_NODETYPE_PADDING:
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dbg_summary("node PADDING\n");
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c->summary->sum_padded += je32_to_cpu(node->u.totlen);
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break;
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case JFFS2_NODETYPE_CLEANMARKER:
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dbg_summary("node CLEANMARKER\n");
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break;
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case JFFS2_NODETYPE_SUMMARY:
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dbg_summary("node SUMMARY\n");
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break;
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default:
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/* If you implement a new node type you should also implement
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summary support for it or disable summary.
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*/
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BUG();
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break;
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}
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return 0;
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no_mem:
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JFFS2_WARNING("MEMORY ALLOCATION ERROR!");
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return -ENOMEM;
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}
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static struct jffs2_raw_node_ref *sum_link_node_ref(struct jffs2_sb_info *c,
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struct jffs2_eraseblock *jeb,
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uint32_t ofs, uint32_t len,
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struct jffs2_inode_cache *ic)
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{
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/* If there was a gap, mark it dirty */
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if ((ofs & ~3) > c->sector_size - jeb->free_size) {
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/* Ew. Summary doesn't actually tell us explicitly about dirty space */
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jffs2_scan_dirty_space(c, jeb, (ofs & ~3) - (c->sector_size - jeb->free_size));
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}
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return jffs2_link_node_ref(c, jeb, jeb->offset + ofs, len, ic);
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}
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/* Process the stored summary information - helper function for jffs2_sum_scan_sumnode() */
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static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
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struct jffs2_raw_summary *summary, uint32_t *pseudo_random)
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{
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struct jffs2_inode_cache *ic;
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struct jffs2_full_dirent *fd;
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void *sp;
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int i, ino;
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int err;
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sp = summary->sum;
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for (i=0; i<je32_to_cpu(summary->sum_num); i++) {
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dbg_summary("processing summary index %d\n", i);
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/* Make sure there's a spare ref for dirty space */
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err = jffs2_prealloc_raw_node_refs(c, jeb, 2);
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if (err)
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return err;
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switch (je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype)) {
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case JFFS2_NODETYPE_INODE: {
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struct jffs2_sum_inode_flash *spi;
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spi = sp;
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ino = je32_to_cpu(spi->inode);
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dbg_summary("Inode at 0x%08x-0x%08x\n",
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jeb->offset + je32_to_cpu(spi->offset),
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jeb->offset + je32_to_cpu(spi->offset) + je32_to_cpu(spi->totlen));
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ic = jffs2_scan_make_ino_cache(c, ino);
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if (!ic) {
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JFFS2_NOTICE("scan_make_ino_cache failed\n");
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return -ENOMEM;
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}
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sum_link_node_ref(c, jeb, je32_to_cpu(spi->offset) | REF_UNCHECKED,
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PAD(je32_to_cpu(spi->totlen)), ic);
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*pseudo_random += je32_to_cpu(spi->version);
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sp += JFFS2_SUMMARY_INODE_SIZE;
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break;
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}
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case JFFS2_NODETYPE_DIRENT: {
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struct jffs2_sum_dirent_flash *spd;
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spd = sp;
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dbg_summary("Dirent at 0x%08x-0x%08x\n",
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jeb->offset + je32_to_cpu(spd->offset),
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jeb->offset + je32_to_cpu(spd->offset) + je32_to_cpu(spd->totlen));
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fd = jffs2_alloc_full_dirent(spd->nsize+1);
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if (!fd)
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return -ENOMEM;
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memcpy(&fd->name, spd->name, spd->nsize);
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fd->name[spd->nsize] = 0;
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ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(spd->pino));
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if (!ic) {
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jffs2_free_full_dirent(fd);
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return -ENOMEM;
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}
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fd->raw = sum_link_node_ref(c, jeb, je32_to_cpu(spd->offset) | REF_UNCHECKED,
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PAD(je32_to_cpu(spd->totlen)), ic);
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fd->next = NULL;
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fd->version = je32_to_cpu(spd->version);
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fd->ino = je32_to_cpu(spd->ino);
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fd->nhash = full_name_hash(fd->name, spd->nsize);
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fd->type = spd->type;
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jffs2_add_fd_to_list(c, fd, &ic->scan_dents);
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*pseudo_random += je32_to_cpu(spd->version);
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sp += JFFS2_SUMMARY_DIRENT_SIZE(spd->nsize);
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break;
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}
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|
#ifdef CONFIG_JFFS2_FS_XATTR
|
|
case JFFS2_NODETYPE_XATTR: {
|
|
struct jffs2_xattr_datum *xd;
|
|
struct jffs2_sum_xattr_flash *spx;
|
|
|
|
spx = (struct jffs2_sum_xattr_flash *)sp;
|
|
dbg_summary("xattr at %#08x-%#08x (xid=%u, version=%u)\n",
|
|
jeb->offset + je32_to_cpu(spx->offset),
|
|
jeb->offset + je32_to_cpu(spx->offset) + je32_to_cpu(spx->totlen),
|
|
je32_to_cpu(spx->xid), je32_to_cpu(spx->version));
|
|
|
|
xd = jffs2_setup_xattr_datum(c, je32_to_cpu(spx->xid),
|
|
je32_to_cpu(spx->version));
|
|
if (IS_ERR(xd)) {
|
|
if (PTR_ERR(xd) == -EEXIST) {
|
|
/* a newer version of xd exists */
|
|
if ((err = jffs2_scan_dirty_space(c, jeb, je32_to_cpu(spx->totlen))))
|
|
return err;
|
|
sp += JFFS2_SUMMARY_XATTR_SIZE;
|
|
break;
|
|
}
|
|
JFFS2_NOTICE("allocation of xattr_datum failed\n");
|
|
return PTR_ERR(xd);
|
|
}
|
|
|
|
xd->node = sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED,
|
|
PAD(je32_to_cpu(spx->totlen)), NULL);
|
|
/* FIXME */ xd->node->next_in_ino = (void *)xd;
|
|
|
|
*pseudo_random += je32_to_cpu(spx->xid);
|
|
sp += JFFS2_SUMMARY_XATTR_SIZE;
|
|
|
|
break;
|
|
}
|
|
case JFFS2_NODETYPE_XREF: {
|
|
struct jffs2_xattr_ref *ref;
|
|
struct jffs2_sum_xref_flash *spr;
|
|
|
|
spr = (struct jffs2_sum_xref_flash *)sp;
|
|
dbg_summary("xref at %#08x-%#08x\n",
|
|
jeb->offset + je32_to_cpu(spr->offset),
|
|
jeb->offset + je32_to_cpu(spr->offset) +
|
|
(uint32_t)PAD(sizeof(struct jffs2_raw_xref)));
|
|
|
|
ref = jffs2_alloc_xattr_ref();
|
|
if (!ref) {
|
|
JFFS2_NOTICE("allocation of xattr_datum failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
ref->ino = 0xfffffffe;
|
|
ref->xid = 0xfffffffd;
|
|
ref->next = c->xref_temp;
|
|
c->xref_temp = ref;
|
|
|
|
ref->node = sum_link_node_ref(c, jeb, je32_to_cpu(spr->offset) | REF_UNCHECKED,
|
|
PAD(sizeof(struct jffs2_raw_xref)), NULL);
|
|
/* FIXME */ ref->node->next_in_ino = (void *)ref;
|
|
|
|
*pseudo_random += ref->node->flash_offset;
|
|
sp += JFFS2_SUMMARY_XREF_SIZE;
|
|
|
|
break;
|
|
}
|
|
#endif
|
|
default : {
|
|
uint16_t nodetype = je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype);
|
|
JFFS2_WARNING("Unsupported node type %x found in summary! Exiting...\n", nodetype);
|
|
if ((nodetype & JFFS2_COMPAT_MASK) == JFFS2_FEATURE_INCOMPAT)
|
|
return -EIO;
|
|
|
|
/* For compatible node types, just fall back to the full scan */
|
|
c->wasted_size -= jeb->wasted_size;
|
|
c->free_size += c->sector_size - jeb->free_size;
|
|
c->used_size -= jeb->used_size;
|
|
c->dirty_size -= jeb->dirty_size;
|
|
jeb->wasted_size = jeb->used_size = jeb->dirty_size = 0;
|
|
jeb->free_size = c->sector_size;
|
|
|
|
jffs2_free_jeb_node_refs(c, jeb);
|
|
return -ENOTRECOVERABLE;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
struct jffs2_unknown_node crcnode;
|
|
int ret, ofs;
|
|
uint32_t crc;
|
|
|
|
ofs = c->sector_size - sumsize;
|
|
|
|
dbg_summary("summary found for 0x%08x at 0x%08x (0x%x bytes)\n",
|
|
jeb->offset, jeb->offset + ofs, sumsize);
|
|
|
|
/* OK, now check for node validity and CRC */
|
|
crcnode.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
|
|
crcnode.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY);
|
|
crcnode.totlen = summary->totlen;
|
|
crc = crc32(0, &crcnode, sizeof(crcnode)-4);
|
|
|
|
if (je32_to_cpu(summary->hdr_crc) != crc) {
|
|
dbg_summary("Summary node header is corrupt (bad CRC or "
|
|
"no summary at all)\n");
|
|
goto crc_err;
|
|
}
|
|
|
|
if (je32_to_cpu(summary->totlen) != sumsize) {
|
|
dbg_summary("Summary node is corrupt (wrong erasesize?)\n");
|
|
goto crc_err;
|
|
}
|
|
|
|
crc = crc32(0, summary, sizeof(struct jffs2_raw_summary)-8);
|
|
|
|
if (je32_to_cpu(summary->node_crc) != crc) {
|
|
dbg_summary("Summary node is corrupt (bad CRC)\n");
|
|
goto crc_err;
|
|
}
|
|
|
|
crc = crc32(0, summary->sum, sumsize - sizeof(struct jffs2_raw_summary));
|
|
|
|
if (je32_to_cpu(summary->sum_crc) != crc) {
|
|
dbg_summary("Summary node data is corrupt (bad CRC)\n");
|
|
goto crc_err;
|
|
}
|
|
|
|
if ( je32_to_cpu(summary->cln_mkr) ) {
|
|
|
|
dbg_summary("Summary : CLEANMARKER node \n");
|
|
|
|
ret = jffs2_prealloc_raw_node_refs(c, jeb, 1);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (je32_to_cpu(summary->cln_mkr) != c->cleanmarker_size) {
|
|
dbg_summary("CLEANMARKER node has totlen 0x%x != normal 0x%x\n",
|
|
je32_to_cpu(summary->cln_mkr), c->cleanmarker_size);
|
|
if ((ret = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr)))))
|
|
return ret;
|
|
} else if (jeb->first_node) {
|
|
dbg_summary("CLEANMARKER node not first node in block "
|
|
"(0x%08x)\n", jeb->offset);
|
|
if ((ret = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr)))))
|
|
return ret;
|
|
} else {
|
|
jffs2_link_node_ref(c, jeb, jeb->offset | REF_NORMAL,
|
|
je32_to_cpu(summary->cln_mkr), NULL);
|
|
}
|
|
}
|
|
|
|
ret = jffs2_sum_process_sum_data(c, jeb, summary, pseudo_random);
|
|
/* -ENOTRECOVERABLE isn't a fatal error -- it means we should do a full
|
|
scan of this eraseblock. So return zero */
|
|
if (ret == -ENOTRECOVERABLE)
|
|
return 0;
|
|
if (ret)
|
|
return ret; /* real error */
|
|
|
|
/* for PARANOIA_CHECK */
|
|
ret = jffs2_prealloc_raw_node_refs(c, jeb, 2);
|
|
if (ret)
|
|
return ret;
|
|
|
|
sum_link_node_ref(c, jeb, ofs | REF_NORMAL, sumsize, NULL);
|
|
|
|
if (unlikely(jeb->free_size)) {
|
|
JFFS2_WARNING("Free size 0x%x bytes in eraseblock @0x%08x with summary?\n",
|
|
jeb->free_size, jeb->offset);
|
|
jeb->wasted_size += jeb->free_size;
|
|
c->wasted_size += jeb->free_size;
|
|
c->free_size -= jeb->free_size;
|
|
jeb->free_size = 0;
|
|
}
|
|
|
|
return jffs2_scan_classify_jeb(c, jeb);
|
|
|
|
crc_err:
|
|
JFFS2_WARNING("Summary node crc error, skipping summary information.\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
struct jffs2_raw_summary isum;
|
|
union jffs2_sum_mem *temp;
|
|
struct jffs2_sum_marker *sm;
|
|
struct kvec vecs[2];
|
|
uint32_t sum_ofs;
|
|
void *wpage;
|
|
int ret;
|
|
size_t retlen;
|
|
|
|
memset(c->summary->sum_buf, 0xff, datasize);
|
|
memset(&isum, 0, sizeof(isum));
|
|
|
|
isum.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
|
|
isum.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY);
|
|
isum.totlen = cpu_to_je32(infosize);
|
|
isum.hdr_crc = cpu_to_je32(crc32(0, &isum, sizeof(struct jffs2_unknown_node) - 4));
|
|
isum.padded = cpu_to_je32(c->summary->sum_padded);
|
|
isum.cln_mkr = cpu_to_je32(c->cleanmarker_size);
|
|
isum.sum_num = cpu_to_je32(c->summary->sum_num);
|
|
wpage = c->summary->sum_buf;
|
|
|
|
while (c->summary->sum_num) {
|
|
temp = c->summary->sum_list_head;
|
|
|
|
switch (je16_to_cpu(temp->u.nodetype)) {
|
|
case JFFS2_NODETYPE_INODE: {
|
|
struct jffs2_sum_inode_flash *sino_ptr = wpage;
|
|
|
|
sino_ptr->nodetype = temp->i.nodetype;
|
|
sino_ptr->inode = temp->i.inode;
|
|
sino_ptr->version = temp->i.version;
|
|
sino_ptr->offset = temp->i.offset;
|
|
sino_ptr->totlen = temp->i.totlen;
|
|
|
|
wpage += JFFS2_SUMMARY_INODE_SIZE;
|
|
|
|
break;
|
|
}
|
|
|
|
case JFFS2_NODETYPE_DIRENT: {
|
|
struct jffs2_sum_dirent_flash *sdrnt_ptr = wpage;
|
|
|
|
sdrnt_ptr->nodetype = temp->d.nodetype;
|
|
sdrnt_ptr->totlen = temp->d.totlen;
|
|
sdrnt_ptr->offset = temp->d.offset;
|
|
sdrnt_ptr->pino = temp->d.pino;
|
|
sdrnt_ptr->version = temp->d.version;
|
|
sdrnt_ptr->ino = temp->d.ino;
|
|
sdrnt_ptr->nsize = temp->d.nsize;
|
|
sdrnt_ptr->type = temp->d.type;
|
|
|
|
memcpy(sdrnt_ptr->name, temp->d.name,
|
|
temp->d.nsize);
|
|
|
|
wpage += JFFS2_SUMMARY_DIRENT_SIZE(temp->d.nsize);
|
|
|
|
break;
|
|
}
|
|
#ifdef CONFIG_JFFS2_FS_XATTR
|
|
case JFFS2_NODETYPE_XATTR: {
|
|
struct jffs2_sum_xattr_flash *sxattr_ptr = wpage;
|
|
|
|
temp = c->summary->sum_list_head;
|
|
sxattr_ptr->nodetype = temp->x.nodetype;
|
|
sxattr_ptr->xid = temp->x.xid;
|
|
sxattr_ptr->version = temp->x.version;
|
|
sxattr_ptr->offset = temp->x.offset;
|
|
sxattr_ptr->totlen = temp->x.totlen;
|
|
|
|
wpage += JFFS2_SUMMARY_XATTR_SIZE;
|
|
break;
|
|
}
|
|
case JFFS2_NODETYPE_XREF: {
|
|
struct jffs2_sum_xref_flash *sxref_ptr = wpage;
|
|
|
|
temp = c->summary->sum_list_head;
|
|
sxref_ptr->nodetype = temp->r.nodetype;
|
|
sxref_ptr->offset = temp->r.offset;
|
|
|
|
wpage += JFFS2_SUMMARY_XREF_SIZE;
|
|
break;
|
|
}
|
|
#endif
|
|
default : {
|
|
if ((je16_to_cpu(temp->u.nodetype) & JFFS2_COMPAT_MASK)
|
|
== JFFS2_FEATURE_RWCOMPAT_COPY) {
|
|
dbg_summary("Writing unknown RWCOMPAT_COPY node type %x\n",
|
|
je16_to_cpu(temp->u.nodetype));
|
|
jffs2_sum_disable_collecting(c->summary);
|
|
} else {
|
|
BUG(); /* unknown node in summary information */
|
|
}
|
|
}
|
|
}
|
|
|
|
c->summary->sum_list_head = temp->u.next;
|
|
kfree(temp);
|
|
|
|
c->summary->sum_num--;
|
|
}
|
|
|
|
jffs2_sum_reset_collected(c->summary);
|
|
|
|
wpage += padsize;
|
|
|
|
sm = wpage;
|
|
sm->offset = cpu_to_je32(c->sector_size - jeb->free_size);
|
|
sm->magic = cpu_to_je32(JFFS2_SUM_MAGIC);
|
|
|
|
isum.sum_crc = cpu_to_je32(crc32(0, c->summary->sum_buf, datasize));
|
|
isum.node_crc = cpu_to_je32(crc32(0, &isum, sizeof(isum) - 8));
|
|
|
|
vecs[0].iov_base = &isum;
|
|
vecs[0].iov_len = sizeof(isum);
|
|
vecs[1].iov_base = c->summary->sum_buf;
|
|
vecs[1].iov_len = datasize;
|
|
|
|
sum_ofs = jeb->offset + c->sector_size - jeb->free_size;
|
|
|
|
dbg_summary("JFFS2: writing out data to flash to pos : 0x%08x\n",
|
|
sum_ofs);
|
|
|
|
ret = jffs2_flash_writev(c, vecs, 2, sum_ofs, &retlen, 0);
|
|
|
|
if (ret || (retlen != infosize)) {
|
|
|
|
JFFS2_WARNING("Write of %u bytes at 0x%08x failed. returned %d, retlen %zd\n",
|
|
infosize, sum_ofs, ret, retlen);
|
|
|
|
if (retlen) {
|
|
/* Waste remaining space */
|
|
spin_lock(&c->erase_completion_lock);
|
|
jffs2_link_node_ref(c, jeb, sum_ofs | REF_OBSOLETE, infosize, NULL);
|
|
spin_unlock(&c->erase_completion_lock);
|
|
}
|
|
|
|
c->summary->sum_size = JFFS2_SUMMARY_NOSUM_SIZE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
spin_lock(&c->erase_completion_lock);
|
|
jffs2_link_node_ref(c, jeb, sum_ofs | REF_NORMAL, infosize, NULL);
|
|
spin_unlock(&c->erase_completion_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Write out summary information - called from jffs2_do_reserve_space */
|
|
|
|
int jffs2_sum_write_sumnode(struct jffs2_sb_info *c)
|
|
{
|
|
int datasize, infosize, padsize;
|
|
struct jffs2_eraseblock *jeb;
|
|
int ret;
|
|
|
|
dbg_summary("called\n");
|
|
|
|
spin_unlock(&c->erase_completion_lock);
|
|
|
|
jeb = c->nextblock;
|
|
jffs2_prealloc_raw_node_refs(c, jeb, 1);
|
|
|
|
if (!c->summary->sum_num || !c->summary->sum_list_head) {
|
|
JFFS2_WARNING("Empty summary info!!!\n");
|
|
BUG();
|
|
}
|
|
|
|
datasize = c->summary->sum_size + sizeof(struct jffs2_sum_marker);
|
|
infosize = sizeof(struct jffs2_raw_summary) + datasize;
|
|
padsize = jeb->free_size - infosize;
|
|
infosize += padsize;
|
|
datasize += padsize;
|
|
|
|
/* Is there enough space for summary? */
|
|
if (padsize < 0) {
|
|
/* don't try to write out summary for this jeb */
|
|
jffs2_sum_disable_collecting(c->summary);
|
|
|
|
JFFS2_WARNING("Not enough space for summary, padsize = %d\n", padsize);
|
|
spin_lock(&c->erase_completion_lock);
|
|
return 0;
|
|
}
|
|
|
|
ret = jffs2_sum_write_data(c, jeb, infosize, datasize, padsize);
|
|
spin_lock(&c->erase_completion_lock);
|
|
return ret;
|
|
}
|