| /* |
| * JFFS2 -- Journalling Flash File System, Version 2. |
| * |
| * Copyright (C) 2004 Ferenc Havasi <havasi@inf.u-szeged.hu>, |
| * Zoltan Sogor <weth@inf.u-szeged.hu>, |
| * Patrik Kluba <pajko@halom.u-szeged.hu>, |
| * University of Szeged, Hungary |
| * 2005 KaiGai Kohei <kaigai@ak.jp.nec.com> |
| * |
| * For licensing information, see the file 'LICENCE' in this directory. |
| * |
| * $Id: summary.c,v 1.4 2005/09/26 11:37:21 havasi Exp $ |
| * |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/sched.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) |
| { |
| c->summary = kmalloc(sizeof(struct jffs2_summary), GFP_KERNEL); |
| |
| if (!c->summary) { |
| JFFS2_WARNING("Can't allocate memory for summary information!\n"); |
| return -ENOMEM; |
| } |
| |
| memset(c->summary, 0, sizeof(struct jffs2_summary)); |
| |
| c->summary->sum_buf = vmalloc(c->sector_size); |
| |
| if (!c->summary->sum_buf) { |
| JFFS2_WARNING("Can't allocate buffer for writing out summary information!\n"); |
| kfree(c->summary); |
| return -ENOMEM; |
| } |
| |
| dbg_summary("returned succesfully\n"); |
| |
| return 0; |
| } |
| |
| void jffs2_sum_exit(struct jffs2_sb_info *c) |
| { |
| dbg_summary("called\n"); |
| |
| jffs2_sum_disable_collecting(c->summary); |
| |
| vfree(c->summary->sum_buf); |
| c->summary->sum_buf = NULL; |
| |
| kfree(c->summary); |
| c->summary = NULL; |
| } |
| |
| static int jffs2_sum_add_mem(struct jffs2_summary *s, union jffs2_sum_mem *item) |
| { |
| if (!s->sum_list_head) |
| s->sum_list_head = (union jffs2_sum_mem *) item; |
| if (s->sum_list_tail) |
| s->sum_list_tail->u.next = (union jffs2_sum_mem *) item; |
| s->sum_list_tail = (union jffs2_sum_mem *) item; |
| |
| switch (je16_to_cpu(item->u.nodetype)) { |
| case JFFS2_NODETYPE_INODE: |
| s->sum_size += JFFS2_SUMMARY_INODE_SIZE; |
| s->sum_num++; |
| dbg_summary("inode (%u) added to summary\n", |
| je32_to_cpu(item->i.inode)); |
| break; |
| case JFFS2_NODETYPE_DIRENT: |
| s->sum_size += JFFS2_SUMMARY_DIRENT_SIZE(item->d.nsize); |
| s->sum_num++; |
| dbg_summary("dirent (%u) added to summary\n", |
| je32_to_cpu(item->d.ino)); |
| break; |
| #ifdef CONFIG_JFFS2_FS_XATTR |
| case JFFS2_NODETYPE_XATTR: |
| s->sum_size += JFFS2_SUMMARY_XATTR_SIZE; |
| s->sum_num++; |
| dbg_summary("xattr (xid=%u, version=%u) added to summary\n", |
| je32_to_cpu(item->x.xid), je32_to_cpu(item->x.version)); |
| break; |
| case JFFS2_NODETYPE_XREF: |
| s->sum_size += JFFS2_SUMMARY_XREF_SIZE; |
| s->sum_num++; |
| dbg_summary("xref added to summary\n"); |
| break; |
| #endif |
| default: |
| JFFS2_WARNING("UNKNOWN node type %u\n", |
| je16_to_cpu(item->u.nodetype)); |
| return 1; |
| } |
| return 0; |
| } |
| |
| |
| /* 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) |
| { |
| dbg_summary("called with %u\n", size); |
| s->sum_padded += size; |
| return 0; |
| } |
| |
| int jffs2_sum_add_inode_mem(struct jffs2_summary *s, struct jffs2_raw_inode *ri, |
| uint32_t ofs) |
| { |
| struct jffs2_sum_inode_mem *temp = kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL); |
| |
| if (!temp) |
| return -ENOMEM; |
| |
| temp->nodetype = ri->nodetype; |
| temp->inode = ri->ino; |
| temp->version = ri->version; |
| temp->offset = cpu_to_je32(ofs); /* relative offset from the begining of the jeb */ |
| temp->totlen = ri->totlen; |
| temp->next = NULL; |
| |
| return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); |
| } |
| |
| int jffs2_sum_add_dirent_mem(struct jffs2_summary *s, struct jffs2_raw_dirent *rd, |
| uint32_t ofs) |
| { |
| struct jffs2_sum_dirent_mem *temp = |
| kmalloc(sizeof(struct jffs2_sum_dirent_mem) + rd->nsize, GFP_KERNEL); |
| |
| if (!temp) |
| return -ENOMEM; |
| |
| temp->nodetype = rd->nodetype; |
| temp->totlen = rd->totlen; |
| temp->offset = cpu_to_je32(ofs); /* relative from the begining of the jeb */ |
| temp->pino = rd->pino; |
| temp->version = rd->version; |
| temp->ino = rd->ino; |
| temp->nsize = rd->nsize; |
| temp->type = rd->type; |
| temp->next = NULL; |
| |
| memcpy(temp->name, rd->name, rd->nsize); |
| |
| return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); |
| } |
| |
| #ifdef CONFIG_JFFS2_FS_XATTR |
| int jffs2_sum_add_xattr_mem(struct jffs2_summary *s, struct jffs2_raw_xattr *rx, uint32_t ofs) |
| { |
| struct jffs2_sum_xattr_mem *temp; |
| |
| temp = kmalloc(sizeof(struct jffs2_sum_xattr_mem), GFP_KERNEL); |
| if (!temp) |
| return -ENOMEM; |
| |
| temp->nodetype = rx->nodetype; |
| temp->xid = rx->xid; |
| temp->version = rx->version; |
| temp->offset = cpu_to_je32(ofs); |
| temp->totlen = rx->totlen; |
| temp->next = NULL; |
| |
| return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); |
| } |
| |
| int jffs2_sum_add_xref_mem(struct jffs2_summary *s, struct jffs2_raw_xref *rr, uint32_t ofs) |
| { |
| struct jffs2_sum_xref_mem *temp; |
| |
| temp = kmalloc(sizeof(struct jffs2_sum_xref_mem), GFP_KERNEL); |
| if (!temp) |
| return -ENOMEM; |
| |
| temp->nodetype = rr->nodetype; |
| temp->offset = cpu_to_je32(ofs); |
| temp->next = NULL; |
| |
| return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); |
| } |
| #endif |
| /* Cleanup every collected summary information */ |
| |
| static void jffs2_sum_clean_collected(struct jffs2_summary *s) |
| { |
| union jffs2_sum_mem *temp; |
| |
| if (!s->sum_list_head) { |
| dbg_summary("already empty\n"); |
| } |
| while (s->sum_list_head) { |
| temp = s->sum_list_head; |
| s->sum_list_head = s->sum_list_head->u.next; |
| kfree(temp); |
| } |
| s->sum_list_tail = NULL; |
| s->sum_padded = 0; |
| s->sum_num = 0; |
| } |
| |
| void jffs2_sum_reset_collected(struct jffs2_summary *s) |
| { |
| dbg_summary("called\n"); |
| jffs2_sum_clean_collected(s); |
| s->sum_size = 0; |
| } |
| |
| void jffs2_sum_disable_collecting(struct jffs2_summary *s) |
| { |
| dbg_summary("called\n"); |
| jffs2_sum_clean_collected(s); |
| s->sum_size = JFFS2_SUMMARY_NOSUM_SIZE; |
| } |
| |
| int jffs2_sum_is_disabled(struct jffs2_summary *s) |
| { |
| return (s->sum_size == JFFS2_SUMMARY_NOSUM_SIZE); |
| } |
| |
| /* 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) |
| { |
| dbg_summary("oldsize=0x%x oldnum=%u => newsize=0x%x newnum=%u\n", |
| c->summary->sum_size, c->summary->sum_num, |
| s->sum_size, s->sum_num); |
| |
| c->summary->sum_size = s->sum_size; |
| c->summary->sum_num = s->sum_num; |
| c->summary->sum_padded = s->sum_padded; |
| c->summary->sum_list_head = s->sum_list_head; |
| c->summary->sum_list_tail = s->sum_list_tail; |
| |
| s->sum_list_head = s->sum_list_tail = NULL; |
| } |
| |
| /* 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) |
| { |
| union jffs2_node_union *node; |
| struct jffs2_eraseblock *jeb; |
| |
| node = invecs[0].iov_base; |
| jeb = &c->blocks[ofs / c->sector_size]; |
| ofs -= jeb->offset; |
| |
| switch (je16_to_cpu(node->u.nodetype)) { |
| case JFFS2_NODETYPE_INODE: { |
| struct jffs2_sum_inode_mem *temp = |
| kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL); |
| |
| if (!temp) |
| goto no_mem; |
| |
| temp->nodetype = node->i.nodetype; |
| temp->inode = node->i.ino; |
| temp->version = node->i.version; |
| temp->offset = cpu_to_je32(ofs); |
| temp->totlen = node->i.totlen; |
| temp->next = NULL; |
| |
| return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); |
| } |
| |
| case JFFS2_NODETYPE_DIRENT: { |
| struct jffs2_sum_dirent_mem *temp = |
| kmalloc(sizeof(struct jffs2_sum_dirent_mem) + node->d.nsize, GFP_KERNEL); |
| |
| if (!temp) |
| goto no_mem; |
| |
| temp->nodetype = node->d.nodetype; |
| temp->totlen = node->d.totlen; |
| temp->offset = cpu_to_je32(ofs); |
| temp->pino = node->d.pino; |
| temp->version = node->d.version; |
| temp->ino = node->d.ino; |
| temp->nsize = node->d.nsize; |
| temp->type = node->d.type; |
| temp->next = NULL; |
| |
| switch (count) { |
| case 1: |
| memcpy(temp->name,node->d.name,node->d.nsize); |
| break; |
| |
| case 2: |
| memcpy(temp->name,invecs[1].iov_base,node->d.nsize); |
| break; |
| |
| default: |
| BUG(); /* impossible count value */ |
| break; |
| } |
| |
| return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); |
| } |
| #ifdef CONFIG_JFFS2_FS_XATTR |
| case JFFS2_NODETYPE_XATTR: { |
| struct jffs2_sum_xattr_mem *temp; |
| if (je32_to_cpu(node->x.version) == 0xffffffff) |
| return 0; |
| temp = kmalloc(sizeof(struct jffs2_sum_xattr_mem), GFP_KERNEL); |
| if (!temp) |
| goto no_mem; |
| |
| temp->nodetype = node->x.nodetype; |
| temp->xid = node->x.xid; |
| temp->version = node->x.version; |
| temp->totlen = node->x.totlen; |
| temp->offset = cpu_to_je32(ofs); |
| temp->next = NULL; |
| |
| return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); |
| } |
| case JFFS2_NODETYPE_XREF: { |
| struct jffs2_sum_xref_mem *temp; |
| |
| if (je32_to_cpu(node->r.ino) == 0xffffffff |
| && je32_to_cpu(node->r.xid) == 0xffffffff) |
| return 0; |
| temp = kmalloc(sizeof(struct jffs2_sum_xref_mem), GFP_KERNEL); |
| if (!temp) |
| goto no_mem; |
| temp->nodetype = node->r.nodetype; |
| temp->offset = cpu_to_je32(ofs); |
| temp->next = NULL; |
| |
| return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); |
| } |
| #endif |
| case JFFS2_NODETYPE_PADDING: |
| dbg_summary("node PADDING\n"); |
| c->summary->sum_padded += je32_to_cpu(node->u.totlen); |
| break; |
| |
| case JFFS2_NODETYPE_CLEANMARKER: |
| dbg_summary("node CLEANMARKER\n"); |
| break; |
| |
| case JFFS2_NODETYPE_SUMMARY: |
| dbg_summary("node SUMMARY\n"); |
| break; |
| |
| default: |
| /* If you implement a new node type you should also implement |
| summary support for it or disable summary. |
| */ |
| BUG(); |
| break; |
| } |
| |
| return 0; |
| |
| no_mem: |
| JFFS2_WARNING("MEMORY ALLOCATION ERROR!"); |
| return -ENOMEM; |
| } |
| |
| |
| /* 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) |
| { |
| struct jffs2_raw_node_ref *raw; |
| struct jffs2_inode_cache *ic; |
| struct jffs2_full_dirent *fd; |
| void *sp; |
| int i, ino; |
| |
| sp = summary->sum; |
| |
| for (i=0; i<je32_to_cpu(summary->sum_num); i++) { |
| dbg_summary("processing summary index %d\n", i); |
| |
| switch (je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype)) { |
| case JFFS2_NODETYPE_INODE: { |
| struct jffs2_sum_inode_flash *spi; |
| spi = sp; |
| |
| ino = je32_to_cpu(spi->inode); |
| |
| dbg_summary("Inode at 0x%08x\n", |
| jeb->offset + je32_to_cpu(spi->offset)); |
| |
| raw = jffs2_alloc_raw_node_ref(); |
| if (!raw) { |
| JFFS2_NOTICE("allocation of node reference failed\n"); |
| return -ENOMEM; |
| } |
| |
| ic = jffs2_scan_make_ino_cache(c, ino); |
| if (!ic) { |
| JFFS2_NOTICE("scan_make_ino_cache failed\n"); |
| jffs2_free_raw_node_ref(raw); |
| return -ENOMEM; |
| } |
| |
| raw->flash_offset = (jeb->offset + je32_to_cpu(spi->offset)) | REF_UNCHECKED; |
| |
| raw->next_in_ino = ic->nodes; |
| ic->nodes = raw; |
| |
| jffs2_link_node_ref(c, jeb, raw, PAD(je32_to_cpu(spi->totlen))); |
| |
| *pseudo_random += je32_to_cpu(spi->version); |
| |
| sp += JFFS2_SUMMARY_INODE_SIZE; |
| |
| break; |
| } |
| |
| case JFFS2_NODETYPE_DIRENT: { |
| struct jffs2_sum_dirent_flash *spd; |
| spd = sp; |
| |
| dbg_summary("Dirent at 0x%08x\n", |
| jeb->offset + je32_to_cpu(spd->offset)); |
| |
| fd = jffs2_alloc_full_dirent(spd->nsize+1); |
| if (!fd) |
| return -ENOMEM; |
| |
| memcpy(&fd->name, spd->name, spd->nsize); |
| fd->name[spd->nsize] = 0; |
| |
| raw = jffs2_alloc_raw_node_ref(); |
| if (!raw) { |
| jffs2_free_full_dirent(fd); |
| JFFS2_NOTICE("allocation of node reference failed\n"); |
| return -ENOMEM; |
| } |
| |
| ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(spd->pino)); |
| if (!ic) { |
| jffs2_free_full_dirent(fd); |
| jffs2_free_raw_node_ref(raw); |
| return -ENOMEM; |
| } |
| |
| raw->flash_offset = (jeb->offset + je32_to_cpu(spd->offset)) | REF_PRISTINE; |
| raw->next_in_ino = ic->nodes; |
| ic->nodes = raw; |
| |
| jffs2_link_node_ref(c, jeb, raw, PAD(je32_to_cpu(spd->totlen))); |
| |
| fd->raw = raw; |
| fd->next = NULL; |
| fd->version = je32_to_cpu(spd->version); |
| fd->ino = je32_to_cpu(spd->ino); |
| fd->nhash = full_name_hash(fd->name, spd->nsize); |
| fd->type = spd->type; |
| |
| jffs2_add_fd_to_list(c, fd, &ic->scan_dents); |
| |
| *pseudo_random += je32_to_cpu(spd->version); |
| |
| sp += JFFS2_SUMMARY_DIRENT_SIZE(spd->nsize); |
| |
| break; |
| } |
| #ifdef CONFIG_JFFS2_FS_XATTR |
| case JFFS2_NODETYPE_XATTR: { |
| struct jffs2_xattr_datum *xd; |
| struct jffs2_sum_xattr_flash *spx; |
| uint32_t ofs; |
| |
| spx = (struct jffs2_sum_xattr_flash *)sp; |
| ofs = jeb->offset + je32_to_cpu(spx->offset); |
| dbg_summary("xattr at %#08x (xid=%u, version=%u)\n", ofs, |
| je32_to_cpu(spx->xid), je32_to_cpu(spx->version)); |
| raw = jffs2_alloc_raw_node_ref(); |
| if (!raw) { |
| JFFS2_NOTICE("allocation of node reference failed\n"); |
| kfree(summary); |
| return -ENOMEM; |
| } |
| xd = jffs2_setup_xattr_datum(c, je32_to_cpu(spx->xid), |
| je32_to_cpu(spx->version)); |
| if (IS_ERR(xd)) { |
| jffs2_free_raw_node_ref(raw); |
| if (PTR_ERR(xd) == -EEXIST) { |
| /* a newer version of xd exists */ |
| DIRTY_SPACE(je32_to_cpu(spx->totlen)); |
| sp += JFFS2_SUMMARY_XATTR_SIZE; |
| break; |
| } |
| JFFS2_NOTICE("allocation of xattr_datum failed\n"); |
| kfree(summary); |
| return PTR_ERR(xd); |
| } |
| xd->node = raw; |
| |
| raw->flash_offset = ofs | REF_UNCHECKED; |
| raw->next_in_ino = (void *)xd; |
| |
| jffs2_link_node_ref(c, jeb, raw, PAD(je32_to_cpu(spx->totlen))); |
| |
| *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; |
| uint32_t ofs; |
| |
| spr = (struct jffs2_sum_xref_flash *)sp; |
| ofs = jeb->offset + je32_to_cpu(spr->offset); |
| dbg_summary("xref at %#08x (xid=%u, ino=%u)\n", ofs, |
| je32_to_cpu(spr->xid), je32_to_cpu(spr->ino)); |
| raw = jffs2_alloc_raw_node_ref(); |
| if (!raw) { |
| JFFS2_NOTICE("allocation of node reference failed\n"); |
| kfree(summary); |
| return -ENOMEM; |
| } |
| ref = jffs2_alloc_xattr_ref(); |
| if (!ref) { |
| JFFS2_NOTICE("allocation of xattr_datum failed\n"); |
| jffs2_free_raw_node_ref(raw); |
| kfree(summary); |
| return -ENOMEM; |
| } |
| ref->ino = 0xfffffffe; |
| ref->xid = 0xfffffffd; |
| ref->node = raw; |
| ref->next = c->xref_temp; |
| c->xref_temp = ref; |
| |
| raw->flash_offset = ofs | REF_UNCHECKED; |
| raw->next_in_ino = (void *)ref; |
| |
| jffs2_link_node_ref(c, jeb, raw, PAD(sizeof(struct jffs2_raw_xref))); |
| |
| *pseudo_random += ofs; |
| sp += JFFS2_SUMMARY_XREF_SIZE; |
| |
| break; |
| } |
| #endif |
| default : { |
| printk("nodetype = %#04x\n",je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype)); |
| JFFS2_WARNING("Unsupported node type found in summary! Exiting..."); |
| return -EIO; |
| } |
| } |
| } |
| |
| 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; |
| struct jffs2_raw_node_ref *cache_ref; |
| int ret, ofs; |
| uint32_t crc; |
| |
| ofs = jeb->offset + c->sector_size - sumsize; |
| |
| dbg_summary("summary found for 0x%08x at 0x%08x (0x%x bytes)\n", |
| 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"); |
| |
| 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); |
| DIRTY_SPACE(PAD(je32_to_cpu(summary->cln_mkr))); |
| } else if (jeb->first_node) { |
| dbg_summary("CLEANMARKER node not first node in block " |
| "(0x%08x)\n", jeb->offset); |
| DIRTY_SPACE(PAD(je32_to_cpu(summary->cln_mkr))); |
| } else { |
| struct jffs2_raw_node_ref *marker_ref = jffs2_alloc_raw_node_ref(); |
| |
| if (!marker_ref) { |
| JFFS2_NOTICE("Failed to allocate node ref for clean marker\n"); |
| return -ENOMEM; |
| } |
| |
| marker_ref->flash_offset = jeb->offset | REF_NORMAL; |
| marker_ref->next_in_ino = NULL; |
| |
| jffs2_link_node_ref(c, jeb, marker_ref, je32_to_cpu(summary->cln_mkr)); |
| } |
| } |
| |
| if (je32_to_cpu(summary->padded)) { |
| DIRTY_SPACE(je32_to_cpu(summary->padded)); |
| } |
| |
| ret = jffs2_sum_process_sum_data(c, jeb, summary, pseudo_random); |
| if (ret) |
| return ret; |
| |
| /* for PARANOIA_CHECK */ |
| cache_ref = jffs2_alloc_raw_node_ref(); |
| |
| if (!cache_ref) { |
| JFFS2_NOTICE("Failed to allocate node ref for cache\n"); |
| return -ENOMEM; |
| } |
| |
| cache_ref->next_in_ino = NULL; |
| cache_ref->next_phys = NULL; |
| cache_ref->flash_offset = ofs | REF_NORMAL; |
| |
| jffs2_link_node_ref(c, jeb, cache_ref, sumsize); |
| |
| 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]; |
| 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; |
| |
| dbg_summary("JFFS2: writing out data to flash to pos : 0x%08x\n", |
| jeb->offset + c->sector_size - jeb->free_size); |
| |
| spin_unlock(&c->erase_completion_lock); |
| ret = jffs2_flash_writev(c, vecs, 2, jeb->offset + c->sector_size - |
| jeb->free_size, &retlen, 0); |
| spin_lock(&c->erase_completion_lock); |
| |
| |
| if (ret || (retlen != infosize)) { |
| JFFS2_WARNING("Write of %u bytes at 0x%08x failed. returned %d, retlen %zd\n", |
| infosize, jeb->offset + c->sector_size - jeb->free_size, ret, retlen); |
| |
| c->summary->sum_size = JFFS2_SUMMARY_NOSUM_SIZE; |
| DIRTY_SPACE(infosize); |
| |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /* Write out summary information - called from jffs2_do_reserve_space */ |
| |
| int jffs2_sum_write_sumnode(struct jffs2_sb_info *c) |
| { |
| struct jffs2_raw_node_ref *summary_ref; |
| int datasize, infosize, padsize, ret; |
| struct jffs2_eraseblock *jeb; |
| |
| dbg_summary("called\n"); |
| |
| jeb = c->nextblock; |
| |
| 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); |
| return 0; |
| } |
| |
| ret = jffs2_sum_write_data(c, jeb, infosize, datasize, padsize); |
| if (ret) |
| return 0; /* can't write out summary, block is marked as NOSUM_SIZE */ |
| |
| /* for ACCT_PARANOIA_CHECK */ |
| spin_unlock(&c->erase_completion_lock); |
| summary_ref = jffs2_alloc_raw_node_ref(); |
| spin_lock(&c->erase_completion_lock); |
| |
| if (!summary_ref) { |
| JFFS2_NOTICE("Failed to allocate node ref for summary\n"); |
| return -ENOMEM; |
| } |
| |
| summary_ref->next_in_ino = NULL; |
| summary_ref->flash_offset = (jeb->offset + c->sector_size - jeb->free_size) | REF_NORMAL; |
| |
| jffs2_link_node_ref(c, jeb, summary_ref, infosize); |
| |
| return 0; |
| } |