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-rw-r--r--fs/jffs2/jffs2_1pass.c241
1 files changed, 210 insertions, 31 deletions
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;
generated by cgit v1.1 at 2024-11-23 21:48:48 +0000