From 998eaaecd46ee5f00550e30e606cb5556e0b9345 Mon Sep 17 00:00:00 2001 From: wdenk Date: Sun, 18 Apr 2004 19:43:36 +0000 Subject: * Configure PPChameleon board to use redundand environment in flash * Configure PPChameleon board to use JFFS2 NAND support. * Added support for JFFS2 filesystem (read-only) on top of NAND flash --- fs/jffs2/jffs2_1pass.c | 241 ++++++++++++++++++++++++++++++++++++++++++------- 1 file changed, 210 insertions(+), 31 deletions(-) (limited to 'fs') diff --git a/fs/jffs2/jffs2_1pass.c b/fs/jffs2/jffs2_1pass.c index 01f1fb7..9acf37b 100644 --- a/fs/jffs2/jffs2_1pass.c +++ b/fs/jffs2/jffs2_1pass.c @@ -140,6 +140,130 @@ # define DEBUGF(fmt,args...) #endif +#if defined(CONFIG_JFFS2_NAND) && (CONFIG_COMMANDS & CFG_CMD_NAND) + +/* + * Support for jffs2 on top of NAND-flash + * + * NAND memory isn't mapped in processor's address space, + * so data should be fetched from flash before + * being processed. This is exactly what functions declared + * here do. + * + */ + +/* this one defined in cmd_nand.c */ +int read_jffs2_nand(size_t start, size_t len, + size_t * retlen, u_char * buf, int nanddev); + +#define NAND_PAGE_SIZE 512 +#define NAND_PAGE_SHIFT 9 +#define NAND_PAGE_MASK (~(NAND_PAGE_SIZE-1)) + +#ifndef NAND_CACHE_PAGES +#define NAND_CACHE_PAGES 16 +#endif +#define NAND_CACHE_SIZE (NAND_CACHE_PAGES*NAND_PAGE_SIZE) + +static u8* nand_cache = NULL; +static u32 nand_cache_off = (u32)-1; +static int nanddev = 0; /* nand device of current partition */ + +static int read_nand_cached(u32 off, u32 size, u_char *buf) +{ + u32 bytes_read = 0; + size_t retlen; + int cpy_bytes; + + while (bytes_read < size) { + if ((off + bytes_read < nand_cache_off) || + (off + bytes_read >= nand_cache_off+NAND_CACHE_SIZE)) { + nand_cache_off = (off + bytes_read) & NAND_PAGE_MASK; + if (!nand_cache) { + /* This memory never gets freed but 'cause + it's a bootloader, nobody cares */ + nand_cache = malloc(NAND_CACHE_SIZE); + if (!nand_cache) { + printf("read_nand_cached: can't alloc cache size %d bytes\n", + NAND_CACHE_SIZE); + return -1; + } + } + if (read_jffs2_nand(nand_cache_off, NAND_CACHE_SIZE, + &retlen, nand_cache, nanddev) < 0 || + retlen != NAND_CACHE_SIZE) { + printf("read_nand_cached: error reading nand off %#x size %d bytes\n", + nand_cache_off, NAND_CACHE_SIZE); + return -1; + } + } + cpy_bytes = nand_cache_off + NAND_CACHE_SIZE - (off + bytes_read); + if (cpy_bytes > size - bytes_read) + cpy_bytes = size - bytes_read; + memcpy(buf + bytes_read, + nand_cache + off + bytes_read - nand_cache_off, + cpy_bytes); + bytes_read += cpy_bytes; + } + return bytes_read; +} + +static void *get_fl_mem(u32 off, u32 size, void *ext_buf) +{ + u_char *buf = ext_buf ? (u_char*)ext_buf : (u_char*)malloc(size); + + if (NULL == buf) { + printf("get_fl_mem: can't alloc %d bytes\n", size); + return NULL; + } + if (read_nand_cached(off, size, buf) < 0) { + free(buf); + return NULL; + } + + return buf; +} + +static void *get_node_mem(u32 off) +{ + struct jffs2_unknown_node node; + void *ret = NULL; + + if (NULL == get_fl_mem(off, sizeof(node), &node)) + return NULL; + + if (!(ret = get_fl_mem(off, node.magic == + JFFS2_MAGIC_BITMASK ? node.totlen : sizeof(node), + NULL))) { + printf("off = %#x magic %#x type %#x node.totlen = %d\n", + off, node.magic, node.nodetype, node.totlen); + } + return ret; +} + +static void put_fl_mem(void *buf) +{ + free(buf); +} + +#else /* defined(CONFIG_JFFS2_NAND) && (CONFIG_COMMANDS & CFG_CMD_NAND) */ + +static inline void *get_fl_mem(u32 off, u32 size, void *ext_buf) +{ + return (void*)off; +} + +static inline void *get_node_mem(u32 off) +{ + return (void*)off; +} + +static inline void put_fl_mem(void *buf) +{ +} + +#endif /* defined(CONFIG_JFFS2_NAND) && (CONFIG_COMMANDS & CFG_CMD_NAND) */ + /* Compression names */ static char *compr_names[] = { @@ -269,8 +393,12 @@ insert_node(struct b_list *list, u32 offset) */ static int compare_inodes(struct b_node *new, struct b_node *old) { - struct jffs2_raw_inode *jNew = (struct jffs2_raw_inode *)new->offset; - struct jffs2_raw_inode *jOld = (struct jffs2_raw_inode *)old->offset; + struct jffs2_raw_inode ojNew; + struct jffs2_raw_inode ojOld; + struct jffs2_raw_inode *jNew = + (struct jffs2_raw_inode *)get_fl_mem(new->offset, sizeof(ojNew), &ojNew); + struct jffs2_raw_inode *jOld = + (struct jffs2_raw_inode *)get_fl_mem(old->offset, sizeof(ojOld), &ojOld); return jNew->version > jOld->version; } @@ -282,8 +410,12 @@ static int compare_inodes(struct b_node *new, struct b_node *old) */ static int compare_dirents(struct b_node *new, struct b_node *old) { - struct jffs2_raw_dirent *jNew = (struct jffs2_raw_dirent *)new->offset; - struct jffs2_raw_dirent *jOld = (struct jffs2_raw_dirent *)old->offset; + struct jffs2_raw_dirent ojNew; + struct jffs2_raw_dirent ojOld; + struct jffs2_raw_dirent *jNew = + (struct jffs2_raw_dirent *)get_fl_mem(new->offset, sizeof(ojNew), &ojNew); + struct jffs2_raw_dirent *jOld = + (struct jffs2_raw_dirent *)get_fl_mem(old->offset, sizeof(ojOld), &ojOld); int cmp; /* ascending sort by pino */ @@ -322,8 +454,10 @@ jffs2_scan_empty(u32 start_offset, struct part_info *part) { char *max = part->offset + part->size - sizeof(struct jffs2_raw_inode); char *offset = part->offset + start_offset; + u32 off; - while (offset < max && *(u32 *)offset == 0xFFFFFFFF) { + while (offset < max && + *(u32*)get_fl_mem((u32)offset, sizeof(u32), &off) == 0xFFFFFFFF) { offset += sizeof(u32); /* return if spinning is due */ if (((u32)offset & ((1 << SPIN_BLKSIZE)-1)) == 0) break; @@ -377,7 +511,8 @@ jffs2_1pass_read_inode(struct b_lists *pL, u32 inode, char *dest) * we will live with it. */ for (b = pL->frag.listHead; b != NULL; b = b->next) { - jNode = (struct jffs2_raw_inode *) (b->offset); + jNode = (struct jffs2_raw_inode *) get_fl_mem(b->offset, + sizeof(struct jffs2_raw_inode), NULL); if ((inode == jNode->ino)) { /* get actual file length from the newest node */ if (jNode->version >= latestVersion) { @@ -385,11 +520,12 @@ jffs2_1pass_read_inode(struct b_lists *pL, u32 inode, char *dest) latestVersion = jNode->version; } } + put_fl_mem(jNode); } #endif for (b = pL->frag.listHead; b != NULL; b = b->next) { - jNode = (struct jffs2_raw_inode *) (b->offset); + jNode = (struct jffs2_raw_inode *) get_node_mem(b->offset); if ((inode == jNode->ino)) { #if 0 putLabeledWord("\r\n\r\nread_inode: totlen = ", jNode->totlen); @@ -415,8 +551,10 @@ jffs2_1pass_read_inode(struct b_lists *pL, u32 inode, char *dest) if(dest) { src = ((char *) jNode) + sizeof(struct jffs2_raw_inode); /* ignore data behind latest known EOF */ - if (jNode->offset > totalSize) + if (jNode->offset > totalSize) { + put_fl_mem(jNode); continue; + } lDest = (char *) (dest + jNode->offset); #if 0 @@ -447,6 +585,7 @@ jffs2_1pass_read_inode(struct b_lists *pL, u32 inode, char *dest) default: /* unknown */ putLabeledWord("UNKOWN COMPRESSION METHOD = ", jNode->compr); + put_fl_mem(jNode); return -1; break; } @@ -458,6 +597,7 @@ jffs2_1pass_read_inode(struct b_lists *pL, u32 inode, char *dest) #endif } counter++; + put_fl_mem(jNode); } #if 0 @@ -483,12 +623,14 @@ jffs2_1pass_find_inode(struct b_lists * pL, const char *name, u32 pino) counter = 0; /* we need to search all and return the inode with the highest version */ for(b = pL->dir.listHead; b; b = b->next, counter++) { - jDir = (struct jffs2_raw_dirent *) (b->offset); + jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset); if ((pino == jDir->pino) && (len == jDir->nsize) && (jDir->ino) && /* 0 for unlink */ (!strncmp(jDir->name, name, len))) { /* a match */ - if (jDir->version < version) + if (jDir->version < version) { + put_fl_mem(jDir); continue; + } if (jDir->version == version && inode != 0) { /* I'm pretty sure this isn't legal */ @@ -508,6 +650,7 @@ jffs2_1pass_find_inode(struct b_lists * pL, const char *name, u32 pino) putLabeledWord("b = ", (u32) b); putLabeledWord("counter = ", counter); #endif + put_fl_mem(jDir); } return inode; } @@ -603,22 +746,26 @@ jffs2_1pass_list_inodes(struct b_lists * pL, u32 pino) struct jffs2_raw_dirent *jDir; for (b = pL->dir.listHead; b; b = b->next) { - jDir = (struct jffs2_raw_dirent *) (b->offset); + jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset); if ((pino == jDir->pino) && (jDir->ino)) { /* ino=0 -> unlink */ u32 i_version = 0; + struct jffs2_raw_inode ojNode; struct jffs2_raw_inode *jNode, *i = NULL; struct b_node *b2 = pL->frag.listHead; while (b2) { - jNode = (struct jffs2_raw_inode *) (b2->offset); + jNode = (struct jffs2_raw_inode *) + get_fl_mem(b2->offset, sizeof(ojNode), &ojNode); if (jNode->ino == jDir->ino && jNode->version >= i_version) - i = jNode; + i = get_fl_mem(b2->offset, sizeof(*i), NULL); b2 = b2->next; } dump_inode(pL, jDir, i); + put_fl_mem(i); } + put_fl_mem(jDir); } return pino; } @@ -686,7 +833,9 @@ jffs2_1pass_resolve_inode(struct b_lists * pL, u32 ino) struct b_node *b2; struct jffs2_raw_dirent *jDir; struct jffs2_raw_inode *jNode; - struct jffs2_raw_dirent *jDirFound = NULL; + u8 jDirFoundType = 0; + u32 jDirFoundIno = 0; + u32 jDirFoundPino = 0; char tmp[256]; u32 version = 0; u32 pino; @@ -694,12 +843,14 @@ jffs2_1pass_resolve_inode(struct b_lists * pL, u32 ino) /* we need to search all and return the inode with the highest version */ for(b = pL->dir.listHead; b; b = b->next) { - jDir = (struct jffs2_raw_dirent *) (b->offset); + jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset); if (ino == jDir->ino) { - if (jDir->version < version) + if (jDir->version < version) { + put_fl_mem(jDir); continue; + } - if (jDir->version == version && jDirFound) { + if (jDir->version == version && jDirFoundType) { /* I'm pretty sure this isn't legal */ putstr(" ** ERROR ** "); putnstr(jDir->name, jDir->nsize); @@ -707,19 +858,22 @@ jffs2_1pass_resolve_inode(struct b_lists * pL, u32 ino) version); } - jDirFound = jDir; + jDirFoundType = jDir->type; + jDirFoundIno = jDir->ino; + jDirFoundPino = jDir->pino; version = jDir->version; } + put_fl_mem(jDir); } /* now we found the right entry again. (shoulda returned inode*) */ - if (jDirFound->type != DT_LNK) - return jDirFound->ino; + if (jDirFoundType != DT_LNK) + return jDirFoundIno; /* it's a soft link so we follow it again. */ b2 = pL->frag.listHead; while (b2) { - jNode = (struct jffs2_raw_inode *) (b2->offset); - if (jNode->ino == jDirFound->ino) { + jNode = (struct jffs2_raw_inode *) get_node_mem(b2->offset); + if (jNode->ino == jDirFoundIno) { src = (unsigned char *) (b2->offset + sizeof(struct jffs2_raw_inode)); #if 0 @@ -730,16 +884,18 @@ jffs2_1pass_resolve_inode(struct b_lists * pL, u32 ino) #endif strncpy(tmp, src, jNode->dsize); tmp[jNode->dsize] = '\0'; + put_fl_mem(jNode); break; } b2 = b2->next; + put_fl_mem(jNode); } /* ok so the name of the new file to find is in tmp */ /* if it starts with a slash it is root based else shared dirs */ if (tmp[0] == '/') pino = 1; else - pino = jDirFound->pino; + pino = jDirFoundPino; return jffs2_1pass_search_inode(pL, tmp, pino); } @@ -796,6 +952,7 @@ unsigned char jffs2_1pass_rescan_needed(struct part_info *part) { struct b_node *b; + struct jffs2_unknown_node onode; struct jffs2_unknown_node *node; struct b_lists *pL = (struct b_lists *)part->jffs2_priv; @@ -814,10 +971,19 @@ jffs2_1pass_rescan_needed(struct part_info *part) DEBUGF ("rescan: different partition\n"); return 1; } + +#if defined(CONFIG_JFFS2_NAND) && (CONFIG_COMMANDS & CFG_CMD_NAND) + if (nanddev != (int)part->usr_priv - 1) { + DEBUGF ("rescan: nand device changed\n"); + return -1; + } +#endif /* defined(CONFIG_JFFS2_NAND) && (CONFIG_COMMANDS & CFG_CMD_NAND) */ + /* but suppose someone reflashed a partition at the same offset... */ b = pL->dir.listHead; while (b) { - node = (struct jffs2_unknown_node *) (b->offset); + node = (struct jffs2_unknown_node *) get_fl_mem(b->offset, + sizeof(onode), &onode); if (node->nodetype != JFFS2_NODETYPE_DIRENT) { DEBUGF ("rescan: fs changed beneath me? (%lx)\n", (unsigned long) b->offset); @@ -833,12 +999,14 @@ static void dump_fragments(struct b_lists *pL) { struct b_node *b; + struct jffs2_raw_inode ojNode; struct jffs2_raw_inode *jNode; putstr("\r\n\r\n******The fragment Entries******\r\n"); b = pL->frag.listHead; while (b) { - jNode = (struct jffs2_raw_inode *) (b->offset); + jNode = (struct jffs2_raw_inode *) get_fl_mem(b->offset, + sizeof(ojNode), &ojNode); putLabeledWord("\r\n\tbuild_list: FLASH_OFFSET = ", b->offset); putLabeledWord("\tbuild_list: totlen = ", jNode->totlen); putLabeledWord("\tbuild_list: inode = ", jNode->ino); @@ -867,7 +1035,7 @@ dump_dirents(struct b_lists *pL) putstr("\r\n\r\n******The directory Entries******\r\n"); b = pL->dir.listHead; while (b) { - jDir = (struct jffs2_raw_dirent *) (b->offset); + jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset); putstr("\r\n"); putnstr(jDir->name, jDir->nsize); putLabeledWord("\r\n\tbuild_list: magic = ", jDir->magic); @@ -883,6 +1051,7 @@ dump_dirents(struct b_lists *pL) putLabeledWord("\tbuild_list: name_crc = ", jDir->name_crc); putLabeledWord("\tbuild_list: offset = ", b->offset); /* FIXME: ? [RS] */ b = b->next; + put_fl_mem(jDir); } } #endif @@ -899,6 +1068,10 @@ jffs2_1pass_build_lists(struct part_info * part) u32 counterF = 0; u32 counterN = 0; +#if defined(CONFIG_JFFS2_NAND) && (CONFIG_COMMANDS & CFG_CMD_NAND) + nanddev = (int)part->usr_priv - 1; +#endif /* defined(CONFIG_JFFS2_NAND) && (CONFIG_COMMANDS & CFG_CMD_NAND) */ + /* turn off the lcd. Refreshing the lcd adds 50% overhead to the */ /* jffs2 list building enterprise nope. in newer versions the overhead is */ /* only about 5 %. not enough to inconvenience people for. */ @@ -918,22 +1091,26 @@ jffs2_1pass_build_lists(struct part_info * part) oldoffset = offset; } - node = (struct jffs2_unknown_node *) (part->offset + offset); + node = (struct jffs2_unknown_node *) get_node_mem((u32)part->offset + offset); if (node->magic == JFFS2_MAGIC_BITMASK && hdr_crc(node)) { /* if its a fragment add it */ if (node->nodetype == JFFS2_NODETYPE_INODE && inode_crc((struct jffs2_raw_inode *) node)) { if (insert_node(&pL->frag, (u32) part->offset + - offset) == NULL) + offset) == NULL) { + put_fl_mem(node); return 0; + } } else if (node->nodetype == JFFS2_NODETYPE_DIRENT && dirent_crc((struct jffs2_raw_dirent *) node) && dirent_name_crc((struct jffs2_raw_dirent *) node)) { if (! (counterN%100)) puts ("\b\b. "); if (insert_node(&pL->dir, (u32) part->offset + - offset) == NULL) + offset) == NULL) { + put_fl_mem(node); return 0; + } counterN++; } else if (node->nodetype == JFFS2_NODETYPE_CLEANMARKER) { if (node->totlen != sizeof(struct jffs2_unknown_node)) @@ -960,7 +1137,7 @@ jffs2_1pass_build_lists(struct part_info * part) counter4++; } /* printf("unknown node magic %4.4x %4.4x @ %lx\n", node->magic, node->nodetype, (unsigned long)node); */ - + put_fl_mem(node); } putstr("\b\b done.\r\n"); /* close off the dots */ @@ -993,6 +1170,7 @@ static u32 jffs2_1pass_fill_info(struct b_lists * pL, struct b_jffs2_info * piL) { struct b_node *b; + struct jffs2_raw_inode ojNode; struct jffs2_raw_inode *jNode; int i; @@ -1004,7 +1182,8 @@ jffs2_1pass_fill_info(struct b_lists * pL, struct b_jffs2_info * piL) b = pL->frag.listHead; while (b) { - jNode = (struct jffs2_raw_inode *) (b->offset); + jNode = (struct jffs2_raw_inode *) get_fl_mem(b->offset, + sizeof(ojNode), &ojNode); if (jNode->compr < JFFS2_NUM_COMPR) { piL->compr_info[jNode->compr].num_frags++; piL->compr_info[jNode->compr].compr_sum += jNode->csize; -- cgit v1.1