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-rw-r--r--fs/jffs2/jffs2_1pass.c516
-rw-r--r--fs/jffs2/jffs2_private.h3
-rw-r--r--fs/jffs2/summary.h163
3 files changed, 586 insertions, 96 deletions
diff --git a/fs/jffs2/jffs2_1pass.c b/fs/jffs2/jffs2_1pass.c
index 920d2fd453..11b66ab4b3 100644
--- a/fs/jffs2/jffs2_1pass.c
+++ b/fs/jffs2/jffs2_1pass.c
@@ -119,6 +119,7 @@
#include <watchdog.h>
#include <jffs2/jffs2.h>
#include <jffs2/jffs2_1pass.h>
+#include <linux/mtd/compat.h>
#include "jffs2_private.h"
@@ -138,6 +139,8 @@
# define DEBUGF(fmt,args...)
#endif
+#include "summary.h"
+
/* keeps pointer to currentlu processed partition */
static struct part_info *current_part;
@@ -245,7 +248,7 @@ static void *get_fl_mem_nand(u32 off, u32 size, void *ext_buf)
return buf;
}
-static void *get_node_mem_nand(u32 off)
+static void *get_node_mem_nand(u32 off, void *ext_buf)
{
struct jffs2_unknown_node node;
void *ret = NULL;
@@ -255,7 +258,7 @@ static void *get_node_mem_nand(u32 off)
if (!(ret = get_fl_mem_nand(off, node.magic ==
JFFS2_MAGIC_BITMASK ? node.totlen : sizeof(node),
- NULL))) {
+ ext_buf))) {
printf("off = %#x magic %#x type %#x node.totlen = %d\n",
off, node.magic, node.nodetype, node.totlen);
}
@@ -344,7 +347,7 @@ static void *get_fl_mem_onenand(u32 off, u32 size, void *ext_buf)
return buf;
}
-static void *get_node_mem_onenand(u32 off)
+static void *get_node_mem_onenand(u32 off, void *ext_buf)
{
struct jffs2_unknown_node node;
void *ret = NULL;
@@ -354,7 +357,7 @@ static void *get_node_mem_onenand(u32 off)
ret = get_fl_mem_onenand(off, node.magic ==
JFFS2_MAGIC_BITMASK ? node.totlen : sizeof(node),
- NULL);
+ ext_buf);
if (!ret) {
printf("off = %#x magic %#x type %#x node.totlen = %d\n",
off, node.magic, node.nodetype, node.totlen);
@@ -377,7 +380,7 @@ static void put_fl_mem_onenand(void *buf)
* NOR flash memory is mapped in processor's address space,
* just return address.
*/
-static inline void *get_fl_mem_nor(u32 off)
+static inline void *get_fl_mem_nor(u32 off, u32 size, void *ext_buf)
{
u32 addr = off;
struct mtdids *id = current_part->dev->id;
@@ -386,12 +389,22 @@ static inline void *get_fl_mem_nor(u32 off)
flash_info_t *flash = &flash_info[id->num];
addr += flash->start[0];
+ if (ext_buf) {
+ memcpy(ext_buf, (void *)addr, size);
+ return ext_buf;
+ }
return (void*)addr;
}
-static inline void *get_node_mem_nor(u32 off)
+static inline void *get_node_mem_nor(u32 off, void *ext_buf)
{
- return (void*)get_fl_mem_nor(off);
+ struct jffs2_unknown_node *pNode;
+
+ /* pNode will point directly to flash - don't provide external buffer
+ and don't care about size */
+ pNode = get_fl_mem_nor(off, 0, NULL);
+ return (void *)get_fl_mem_nor(off, pNode->magic == JFFS2_MAGIC_BITMASK ?
+ pNode->totlen : sizeof(*pNode), ext_buf);
}
#endif
@@ -405,8 +418,9 @@ static inline void *get_fl_mem(u32 off, u32 size, void *ext_buf)
struct mtdids *id = current_part->dev->id;
#if defined(CONFIG_CMD_FLASH)
- if (id->type == MTD_DEV_TYPE_NOR)
- return get_fl_mem_nor(off);
+ if (id->type == MTD_DEV_TYPE_NOR) {
+ return get_fl_mem_nor(off, size, ext_buf);
+ }
#endif
#if defined(CONFIG_JFFS2_NAND) && defined(CONFIG_CMD_NAND)
@@ -423,34 +437,38 @@ static inline void *get_fl_mem(u32 off, u32 size, void *ext_buf)
return (void*)off;
}
-static inline void *get_node_mem(u32 off)
+static inline void *get_node_mem(u32 off, void *ext_buf)
{
struct mtdids *id = current_part->dev->id;
#if defined(CONFIG_CMD_FLASH)
if (id->type == MTD_DEV_TYPE_NOR)
- return get_node_mem_nor(off);
+ return get_node_mem_nor(off, ext_buf);
#endif
#if defined(CONFIG_JFFS2_NAND) && \
defined(CONFIG_CMD_NAND)
if (id->type == MTD_DEV_TYPE_NAND)
- return get_node_mem_nand(off);
+ return get_node_mem_nand(off, ext_buf);
#endif
#if defined(CONFIG_CMD_ONENAND)
if (id->type == MTD_DEV_TYPE_ONENAND)
- return get_node_mem_onenand(off);
+ return get_node_mem_onenand(off, ext_buf);
#endif
printf("get_node_mem: unknown device type, using raw offset!\n");
return (void*)off;
}
-static inline void put_fl_mem(void *buf)
+static inline void put_fl_mem(void *buf, void *ext_buf)
{
struct mtdids *id = current_part->dev->id;
+ /* If buf is the same as ext_buf, it was provided by the caller -
+ we shouldn't free it then. */
+ if (buf == ext_buf)
+ return;
switch (id->type) {
#if defined(CONFIG_JFFS2_NAND) && defined(CONFIG_CMD_NAND)
case MTD_DEV_TYPE_NAND:
@@ -478,9 +496,6 @@ static char *compr_names[] = {
#endif
};
-/* Spinning wheel */
-static char spinner[] = { '|', '/', '-', '\\' };
-
/* Memory management */
struct mem_block {
u32 index;
@@ -651,23 +666,6 @@ static int compare_dirents(struct b_node *new, struct b_node *old)
}
#endif
-static u32
-jffs2_scan_empty(u32 start_offset, struct part_info *part)
-{
- char *max = (char *)(part->offset + part->size - sizeof(struct jffs2_raw_inode));
- char *offset = (char *)(part->offset + start_offset);
- u32 off;
-
- 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;
- }
-
- return (u32)offset - part->offset;
-}
-
void
jffs2_free_cache(struct part_info *part)
{
@@ -677,6 +675,7 @@ jffs2_free_cache(struct part_info *part)
pL = (struct b_lists *)part->jffs2_priv;
free_nodes(&pL->frag);
free_nodes(&pL->dir);
+ free(pL->readbuf);
free(pL);
}
}
@@ -723,7 +722,7 @@ jffs2_1pass_read_inode(struct b_lists *pL, u32 inode, char *dest)
*/
for (b = pL->frag.listHead; b != NULL; b = b->next) {
jNode = (struct jffs2_raw_inode *) get_fl_mem(b->offset,
- sizeof(struct jffs2_raw_inode), NULL);
+ sizeof(struct jffs2_raw_inode), pL->readbuf);
if ((inode == jNode->ino)) {
/* get actual file length from the newest node */
if (jNode->version >= latestVersion) {
@@ -731,12 +730,13 @@ jffs2_1pass_read_inode(struct b_lists *pL, u32 inode, char *dest)
latestVersion = jNode->version;
}
}
- put_fl_mem(jNode);
+ put_fl_mem(jNode, pL->readbuf);
}
#endif
for (b = pL->frag.listHead; b != NULL; b = b->next) {
- jNode = (struct jffs2_raw_inode *) get_node_mem(b->offset);
+ jNode = (struct jffs2_raw_inode *) get_node_mem(b->offset,
+ pL->readbuf);
if ((inode == jNode->ino)) {
#if 0
putLabeledWord("\r\n\r\nread_inode: totlen = ", jNode->totlen);
@@ -763,7 +763,14 @@ jffs2_1pass_read_inode(struct b_lists *pL, u32 inode, char *dest)
src = ((uchar *) jNode) + sizeof(struct jffs2_raw_inode);
/* ignore data behind latest known EOF */
if (jNode->offset > totalSize) {
- put_fl_mem(jNode);
+ put_fl_mem(jNode, pL->readbuf);
+ continue;
+ }
+ if (b->datacrc == CRC_UNKNOWN)
+ b->datacrc = data_crc(jNode) ?
+ CRC_OK : CRC_BAD;
+ if (b->datacrc == CRC_BAD) {
+ put_fl_mem(jNode, pL->readbuf);
continue;
}
@@ -804,7 +811,7 @@ jffs2_1pass_read_inode(struct b_lists *pL, u32 inode, char *dest)
default:
/* unknown */
putLabeledWord("UNKOWN COMPRESSION METHOD = ", jNode->compr);
- put_fl_mem(jNode);
+ put_fl_mem(jNode, pL->readbuf);
return -1;
break;
}
@@ -816,7 +823,7 @@ jffs2_1pass_read_inode(struct b_lists *pL, u32 inode, char *dest)
#endif
}
counter++;
- put_fl_mem(jNode);
+ put_fl_mem(jNode, pL->readbuf);
}
#if 0
@@ -842,12 +849,13 @@ 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 *) get_node_mem(b->offset);
+ jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset,
+ pL->readbuf);
if ((pino == jDir->pino) && (len == jDir->nsize) &&
(jDir->ino) && /* 0 for unlink */
(!strncmp((char *)jDir->name, name, len))) { /* a match */
if (jDir->version < version) {
- put_fl_mem(jDir);
+ put_fl_mem(jDir, pL->readbuf);
continue;
}
@@ -869,7 +877,7 @@ 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);
+ put_fl_mem(jDir, pL->readbuf);
}
return inode;
}
@@ -940,9 +948,7 @@ static inline u32 dump_inode(struct b_lists * pL, struct jffs2_raw_dirent *d, st
st.st_mtime = i->mtime;
st.st_mode = i->mode;
st.st_ino = i->ino;
-
- /* neither dsize nor isize help us.. do it the long way */
- st.st_size = jffs2_1pass_read_inode(pL, i->ino, NULL);
+ st.st_size = i->isize;
dump_stat(&st, fname);
@@ -965,7 +971,8 @@ 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 *) get_node_mem(b->offset);
+ jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset,
+ pL->readbuf);
if ((pino == jDir->pino) && (jDir->ino)) { /* ino=0 -> unlink */
u32 i_version = 0;
struct jffs2_raw_inode ojNode;
@@ -976,21 +983,25 @@ jffs2_1pass_list_inodes(struct b_lists * pL, u32 pino)
jNode = (struct jffs2_raw_inode *)
get_fl_mem(b2->offset, sizeof(ojNode), &ojNode);
if (jNode->ino == jDir->ino && jNode->version >= i_version) {
+ i_version = jNode->version;
if (i)
- put_fl_mem(i);
+ put_fl_mem(i, NULL);
if (jDir->type == DT_LNK)
- i = get_node_mem(b2->offset);
+ i = get_node_mem(b2->offset,
+ NULL);
else
- i = get_fl_mem(b2->offset, sizeof(*i), NULL);
+ i = get_fl_mem(b2->offset,
+ sizeof(*i),
+ NULL);
}
b2 = b2->next;
}
dump_inode(pL, jDir, i);
- put_fl_mem(i);
+ put_fl_mem(i, NULL);
}
- put_fl_mem(jDir);
+ put_fl_mem(jDir, pL->readbuf);
}
return pino;
}
@@ -1068,10 +1079,11 @@ 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 *) get_node_mem(b->offset);
+ jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset,
+ pL->readbuf);
if (ino == jDir->ino) {
if (jDir->version < version) {
- put_fl_mem(jDir);
+ put_fl_mem(jDir, pL->readbuf);
continue;
}
@@ -1088,7 +1100,7 @@ jffs2_1pass_resolve_inode(struct b_lists * pL, u32 ino)
jDirFoundPino = jDir->pino;
version = jDir->version;
}
- put_fl_mem(jDir);
+ put_fl_mem(jDir, pL->readbuf);
}
/* now we found the right entry again. (shoulda returned inode*) */
if (jDirFoundType != DT_LNK)
@@ -1097,7 +1109,8 @@ jffs2_1pass_resolve_inode(struct b_lists * pL, u32 ino)
/* it's a soft link so we follow it again. */
b2 = pL->frag.listHead;
while (b2) {
- jNode = (struct jffs2_raw_inode *) get_node_mem(b2->offset);
+ jNode = (struct jffs2_raw_inode *) get_node_mem(b2->offset,
+ pL->readbuf);
if (jNode->ino == jDirFoundIno) {
src = (unsigned char *)jNode + sizeof(struct jffs2_raw_inode);
@@ -1109,11 +1122,11 @@ jffs2_1pass_resolve_inode(struct b_lists * pL, u32 ino)
#endif
strncpy(tmp, (char *)src, jNode->dsize);
tmp[jNode->dsize] = '\0';
- put_fl_mem(jNode);
+ put_fl_mem(jNode, pL->readbuf);
break;
}
b2 = b2->next;
- put_fl_mem(jNode);
+ put_fl_mem(jNode, pL->readbuf);
}
/* 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 */
@@ -1207,6 +1220,132 @@ jffs2_1pass_rescan_needed(struct part_info *part)
return 0;
}
+#define dbg_summary(...) do {} while (0);
+/* Process the stored summary information - helper function for
+ * jffs2_sum_scan_sumnode()
+ */
+
+static int jffs2_sum_process_sum_data(struct part_info *part, uint32_t offset,
+ struct jffs2_raw_summary *summary,
+ struct b_lists *pL)
+{
+ void *sp;
+ int i;
+
+ sp = summary->sum;
+
+ for (i = 0; i < summary->sum_num; i++) {
+ dbg_summary("processing summary index %d\n", i);
+
+ switch (((struct jffs2_sum_unknown_flash *)sp)->nodetype) {
+ case JFFS2_NODETYPE_INODE: {
+ struct jffs2_sum_inode_flash *spi;
+ spi = sp;
+
+ dbg_summary("Inode at 0x%08x-0x%08x\n",
+ offset + spi->offset,
+ offset + spi->offset + spi->totlen);
+
+ if (insert_node(&pL->frag, (u32) part->offset +
+ offset + spi->offset) == NULL)
+ return -1;
+
+ sp += JFFS2_SUMMARY_INODE_SIZE;
+
+ break;
+ }
+
+ case JFFS2_NODETYPE_DIRENT: {
+ struct jffs2_sum_dirent_flash *spd;
+ spd = sp;
+
+ dbg_summary("Dirent at 0x%08x-0x%08x\n",
+ offset + spd->offset,
+ offset + spd->offset + spd->totlen);
+
+ if (insert_node(&pL->dir, (u32) part->offset +
+ offset + spd->offset) == NULL)
+ return -1;
+
+ sp += JFFS2_SUMMARY_DIRENT_SIZE(spd->nsize);
+
+ break;
+ }
+ default : {
+ uint16_t nodetype =
+ ((struct jffs2_sum_unknown_flash *)
+ sp)->nodetype;
+ printf("Unsupported node type %x found in "
+ "summary!\n", nodetype);
+ break;
+ }
+ }
+ }
+ return 0;
+}
+
+/* Process the summary node - called from jffs2_scan_eraseblock() */
+int jffs2_sum_scan_sumnode(struct part_info *part, uint32_t offset,
+ struct jffs2_raw_summary *summary, uint32_t sumsize,
+ struct b_lists *pL)
+{
+ struct jffs2_unknown_node crcnode;
+ int ret, ofs;
+ uint32_t crc;
+
+ ofs = part->sector_size - sumsize;
+
+ dbg_summary("summary found for 0x%08x at 0x%08x (0x%x bytes)\n",
+ offset, offset + ofs, sumsize);
+
+ /* OK, now check for node validity and CRC */
+ crcnode.magic = JFFS2_MAGIC_BITMASK;
+ crcnode.nodetype = JFFS2_NODETYPE_SUMMARY;
+ crcnode.totlen = summary->totlen;
+ crc = crc32_no_comp(0, (uchar *)&crcnode, sizeof(crcnode)-4);
+
+ if (summary->hdr_crc != crc) {
+ dbg_summary("Summary node header is corrupt (bad CRC or "
+ "no summary at all)\n");
+ goto crc_err;
+ }
+
+ if (summary->totlen != sumsize) {
+ dbg_summary("Summary node is corrupt (wrong erasesize?)\n");
+ goto crc_err;
+ }
+
+ crc = crc32_no_comp(0, (uchar *)summary,
+ sizeof(struct jffs2_raw_summary)-8);
+
+ if (summary->node_crc != crc) {
+ dbg_summary("Summary node is corrupt (bad CRC)\n");
+ goto crc_err;
+ }
+
+ crc = crc32_no_comp(0, (uchar *)summary->sum,
+ sumsize - sizeof(struct jffs2_raw_summary));
+
+ if (summary->sum_crc != crc) {
+ dbg_summary("Summary node data is corrupt (bad CRC)\n");
+ goto crc_err;
+ }
+
+ if (summary->cln_mkr)
+ dbg_summary("Summary : CLEANMARKER node \n");
+
+ ret = jffs2_sum_process_sum_data(part, offset, summary, pL);
+ if (ret)
+ return ret; /* real error */
+
+ return 1;
+
+crc_err:
+ putstr("Summary node crc error, skipping summary information.\n");
+
+ return 0;
+}
+
#ifdef DEBUG_FRAGMENTS
static void
dump_fragments(struct b_lists *pL)
@@ -1248,7 +1387,8 @@ 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 *) get_node_mem(b->offset);
+ jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset,
+ pL->readbuf);
putstr("\r\n");
putnstr(jDir->name, jDir->nsize);
putLabeledWord("\r\n\tbuild_list: magic = ", jDir->magic);
@@ -1264,22 +1404,34 @@ 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);
+ put_fl_mem(jDir, pL->readbuf);
}
}
#endif
+#define DEFAULT_EMPTY_SCAN_SIZE 4096
+
+static inline uint32_t EMPTY_SCAN_SIZE(uint32_t sector_size)
+{
+ if (sector_size < DEFAULT_EMPTY_SCAN_SIZE)
+ return sector_size;
+ else
+ return DEFAULT_EMPTY_SCAN_SIZE;
+}
+
static u32
jffs2_1pass_build_lists(struct part_info * part)
{
struct b_lists *pL;
struct jffs2_unknown_node *node;
- u32 offset, oldoffset = 0;
- u32 max = part->size - sizeof(struct jffs2_raw_inode);
- u32 counter = 0;
+ u32 nr_sectors = part->size/part->sector_size;
+ u32 i;
u32 counter4 = 0;
u32 counterF = 0;
u32 counterN = 0;
+ u32 max_totlen = 0;
+ u32 buf_size = DEFAULT_EMPTY_SCAN_SIZE;
+ char *buf;
/* turn off the lcd. Refreshing the lcd adds 50% overhead to the */
/* jffs2 list building enterprise nope. in newer versions the overhead is */
@@ -1289,71 +1441,245 @@ jffs2_1pass_build_lists(struct part_info * part)
/* if we are building a list we need to refresh the cache. */
jffs_init_1pass_list(part);
pL = (struct b_lists *)part->jffs2_priv;
- offset = 0;
+ buf = malloc(buf_size);
puts ("Scanning JFFS2 FS: ");
/* start at the beginning of the partition */
- while (offset < max) {
- if ((oldoffset >> SPIN_BLKSIZE) != (offset >> SPIN_BLKSIZE)) {
- printf("\b\b%c ", spinner[counter++ % sizeof(spinner)]);
- oldoffset = offset;
- }
+ for (i = 0; i < nr_sectors; i++) {
+ uint32_t sector_ofs = i * part->sector_size;
+ uint32_t buf_ofs = sector_ofs;
+ uint32_t buf_len;
+ uint32_t ofs, prevofs;
+ struct jffs2_sum_marker *sm;
+ void *sumptr = NULL;
+ uint32_t sumlen;
+ int ret;
WATCHDOG_RESET();
- node = (struct jffs2_unknown_node *) get_node_mem((u32)part->offset + offset);
- if (node->magic == JFFS2_MAGIC_BITMASK && hdr_crc(node)) {
+ buf_len = sizeof(*sm);
+
+ /* Read as much as we want into the _end_ of the preallocated
+ * buffer
+ */
+ get_fl_mem(part->offset + sector_ofs + part->sector_size -
+ buf_len, buf_len, buf + buf_size - buf_len);
+
+ sm = (void *)buf + buf_size - sizeof(*sm);
+ if (sm->magic == JFFS2_SUM_MAGIC) {
+ sumlen = part->sector_size - sm->offset;
+ sumptr = buf + buf_size - sumlen;
+
+ /* Now, make sure the summary itself is available */
+ if (sumlen > buf_size) {
+ /* Need to kmalloc for this. */
+ sumptr = malloc(sumlen);
+ if (!sumptr) {
+ putstr("Can't get memory for summary "
+ "node!\n");
+ return 0;
+ }
+ memcpy(sumptr + sumlen - buf_len, buf +
+ buf_size - buf_len, buf_len);
+ }
+ if (buf_len < sumlen) {
+ /* Need to read more so that the entire summary
+ * node is present
+ */
+ get_fl_mem(part->offset + sector_ofs +
+ part->sector_size - sumlen,
+ sumlen - buf_len, sumptr);
+ }
+ }
+
+ if (sumptr) {
+ ret = jffs2_sum_scan_sumnode(part, sector_ofs, sumptr,
+ sumlen, pL);
+
+ if (buf_size && sumlen > buf_size)
+ free(sumptr);
+ if (ret < 0)
+ return 0;
+ if (ret)
+ continue;
+
+ }
+
+ buf_len = EMPTY_SCAN_SIZE(part->sector_size);
+
+ get_fl_mem((u32)part->offset + buf_ofs, buf_len, buf);
+
+ /* We temporarily use 'ofs' as a pointer into the buffer/jeb */
+ ofs = 0;
+
+ /* Scan only 4KiB of 0xFF before declaring it's empty */
+ while (ofs < EMPTY_SCAN_SIZE(part->sector_size) &&
+ *(uint32_t *)(&buf[ofs]) == 0xFFFFFFFF)
+ ofs += 4;
+
+ if (ofs == EMPTY_SCAN_SIZE(part->sector_size))
+ continue;
+
+ ofs += sector_ofs;
+ prevofs = ofs - 1;
+
+ scan_more:
+ while (ofs < sector_ofs + part->sector_size) {
+ if (ofs == prevofs) {
+ printf("offset %08x already seen, skip\n", ofs);
+ ofs += 4;
+ counter4++;
+ continue;
+ }
+ prevofs = ofs;
+ if (sector_ofs + part->sector_size <
+ ofs + sizeof(*node))
+ break;
+ if (buf_ofs + buf_len < ofs + sizeof(*node)) {
+ buf_len = min_t(uint32_t, buf_size, sector_ofs
+ + part->sector_size - ofs);
+ get_fl_mem((u32)part->offset + ofs, buf_len,
+ buf);
+ buf_ofs = ofs;
+ }
+
+ node = (struct jffs2_unknown_node *)&buf[ofs-buf_ofs];
+
+ if (*(uint32_t *)(&buf[ofs-buf_ofs]) == 0xffffffff) {
+ uint32_t inbuf_ofs;
+ uint32_t empty_start, scan_end;
+
+ empty_start = ofs;
+ ofs += 4;
+ scan_end = min_t(uint32_t, EMPTY_SCAN_SIZE(
+ part->sector_size)/8,
+ buf_len);
+ more_empty:
+ inbuf_ofs = ofs - buf_ofs;
+ while (inbuf_ofs < scan_end) {
+ if (*(uint32_t *)(&buf[inbuf_ofs]) !=
+ 0xffffffff)
+ goto scan_more;
+
+ inbuf_ofs += 4;
+ ofs += 4;
+ }
+ /* Ran off end. */
+
+ /* See how much more there is to read in this
+ * eraseblock...
+ */
+ buf_len = min_t(uint32_t, buf_size,
+ sector_ofs +
+ part->sector_size - ofs);
+ if (!buf_len) {
+ /* No more to read. Break out of main
+ * loop without marking this range of
+ * empty space as dirty (because it's
+ * not)
+ */
+ break;
+ }
+ scan_end = buf_len;
+ get_fl_mem((u32)part->offset + ofs, buf_len,
+ buf);
+ buf_ofs = ofs;
+ goto more_empty;
+ }
+ if (node->magic != JFFS2_MAGIC_BITMASK ||
+ !hdr_crc(node)) {
+ ofs += 4;
+ counter4++;
+ continue;
+ }
+ if (ofs + node->totlen >
+ sector_ofs + part->sector_size) {
+ ofs += 4;
+ counter4++;
+ continue;
+ }
/* if its a fragment add it */
- if (node->nodetype == JFFS2_NODETYPE_INODE &&
- inode_crc((struct jffs2_raw_inode *) node) &&
- data_crc((struct jffs2_raw_inode *) node)) {
+ switch (node->nodetype) {
+ case JFFS2_NODETYPE_INODE:
+ if (buf_ofs + buf_len < ofs + sizeof(struct
+ jffs2_raw_inode)) {
+ get_fl_mem((u32)part->offset + ofs,
+ buf_len, buf);
+ buf_ofs = ofs;
+ node = (void *)buf;
+ }
+ if (!inode_crc((struct jffs2_raw_inode *) node))
+ break;
+
if (insert_node(&pL->frag, (u32) part->offset +
- offset) == NULL) {
- put_fl_mem(node);
+ ofs) == NULL)
return 0;
+ if (max_totlen < node->totlen)
+ max_totlen = node->totlen;
+ break;
+ case JFFS2_NODETYPE_DIRENT:
+ if (buf_ofs + buf_len < ofs + sizeof(struct
+ jffs2_raw_dirent) +
+ ((struct
+ jffs2_raw_dirent *)
+ node)->nsize) {
+ get_fl_mem((u32)part->offset + ofs,
+ buf_len, buf);
+ buf_ofs = ofs;
+ node = (void *)buf;
}
- } else if (node->nodetype == JFFS2_NODETYPE_DIRENT &&
- dirent_crc((struct jffs2_raw_dirent *) node) &&
- dirent_name_crc((struct jffs2_raw_dirent *) node)) {
+
+ if (!dirent_crc((struct jffs2_raw_dirent *)
+ node) ||
+ !dirent_name_crc(
+ (struct
+ jffs2_raw_dirent *)
+ node))
+ break;
if (! (counterN%100))
puts ("\b\b. ");
if (insert_node(&pL->dir, (u32) part->offset +
- offset) == NULL) {
- put_fl_mem(node);
+ ofs) == NULL)
return 0;
- }
+ if (max_totlen < node->totlen)
+ max_totlen = node->totlen;
counterN++;
- } else if (node->nodetype == JFFS2_NODETYPE_CLEANMARKER) {
+ break;
+ case JFFS2_NODETYPE_CLEANMARKER:
if (node->totlen != sizeof(struct jffs2_unknown_node))
printf("OOPS Cleanmarker has bad size "
"%d != %zu\n",
node->totlen,
sizeof(struct jffs2_unknown_node));
- } else if (node->nodetype == JFFS2_NODETYPE_PADDING) {
+ break;
+ case JFFS2_NODETYPE_PADDING:
if (node->totlen < sizeof(struct jffs2_unknown_node))
printf("OOPS Padding has bad size "
"%d < %zu\n",
node->totlen,
sizeof(struct jffs2_unknown_node));
- } else {
+ break;
+ case JFFS2_NODETYPE_SUMMARY:
+ break;
+ default:
printf("Unknown node type: %x len %d offset 0x%x\n",
node->nodetype,
- node->totlen, offset);
+ node->totlen, ofs);
}
- offset += ((node->totlen + 3) & ~3);
+ ofs += ((node->totlen + 3) & ~3);
counterF++;
- } else if (node->magic == JFFS2_EMPTY_BITMASK &&
- node->nodetype == JFFS2_EMPTY_BITMASK) {
- offset = jffs2_scan_empty(offset, part);
- } else { /* if we know nothing, we just step and look. */
- offset += 4;
- counter4++;
}
-/* printf("unknown node magic %4.4x %4.4x @ %lx\n", node->magic, node->nodetype, (unsigned long)node); */
- put_fl_mem(node);
}
+ free(buf);
putstr("\b\b done.\r\n"); /* close off the dots */
+
+ /* We don't care if malloc failed - then each read operation will
+ * allocate its own buffer as necessary (NAND) or will read directly
+ * from flash (NOR).
+ */
+ pL->readbuf = malloc(max_totlen);
+
/* turn the lcd back on. */
/* splash(); */
diff --git a/fs/jffs2/jffs2_private.h b/fs/jffs2/jffs2_private.h
index 97457627c1..658b325219 100644
--- a/fs/jffs2/jffs2_private.h
+++ b/fs/jffs2/jffs2_private.h
@@ -7,6 +7,7 @@
struct b_node {
u32 offset;
struct b_node *next;
+ enum { CRC_UNKNOWN = 0, CRC_OK, CRC_BAD } datacrc;
};
struct b_list {
@@ -24,7 +25,7 @@ struct b_list {
struct b_lists {
struct b_list dir;
struct b_list frag;
-
+ void *readbuf;
};
struct b_compr_info {
diff --git a/fs/jffs2/summary.h b/fs/jffs2/summary.h
new file mode 100644
index 0000000000..834933cd15
--- /dev/null
+++ b/fs/jffs2/summary.h
@@ -0,0 +1,163 @@
+/*
+ * JFFS2 -- Journalling Flash File System, Version 2.
+ *
+ * Copyright © 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
+ *
+ * For licensing information, see the file 'LICENCE' in this directory.
+ *
+ */
+
+#ifndef JFFS2_SUMMARY_H
+#define JFFS2_SUMMARY_H
+
+#define BLK_STATE_ALLFF 0
+#define BLK_STATE_CLEAN 1
+#define BLK_STATE_PARTDIRTY 2
+#define BLK_STATE_CLEANMARKER 3
+#define BLK_STATE_ALLDIRTY 4
+#define BLK_STATE_BADBLOCK 5
+
+#define JFFS2_SUMMARY_NOSUM_SIZE 0xffffffff
+#define JFFS2_SUMMARY_INODE_SIZE (sizeof(struct jffs2_sum_inode_flash))
+#define JFFS2_SUMMARY_DIRENT_SIZE(x) (sizeof(struct jffs2_sum_dirent_flash) + (x))
+#define JFFS2_SUMMARY_XATTR_SIZE (sizeof(struct jffs2_sum_xattr_flash))
+#define JFFS2_SUMMARY_XREF_SIZE (sizeof(struct jffs2_sum_xref_flash))
+
+/* Summary structures used on flash */
+
+struct jffs2_sum_unknown_flash
+{
+ __u16 nodetype; /* node type */
+};
+
+struct jffs2_sum_inode_flash
+{
+ __u16 nodetype; /* node type */
+ __u32 inode; /* inode number */
+ __u32 version; /* inode version */
+ __u32 offset; /* offset on jeb */
+ __u32 totlen; /* record length */
+} __attribute__((packed));
+
+struct jffs2_sum_dirent_flash
+{
+ __u16 nodetype; /* == JFFS_NODETYPE_DIRENT */
+ __u32 totlen; /* record length */
+ __u32 offset; /* offset on jeb */
+ __u32 pino; /* parent inode */
+ __u32 version; /* dirent version */
+ __u32 ino; /* == zero for unlink */
+ uint8_t nsize; /* dirent name size */
+ uint8_t type; /* dirent type */
+ uint8_t name[0]; /* dirent name */
+} __attribute__((packed));
+
+struct jffs2_sum_xattr_flash
+{
+ __u16 nodetype; /* == JFFS2_NODETYPE_XATR */
+ __u32 xid; /* xattr identifier */
+ __u32 version; /* version number */
+ __u32 offset; /* offset on jeb */
+ __u32 totlen; /* node length */
+} __attribute__((packed));
+
+struct jffs2_sum_xref_flash
+{
+ __u16 nodetype; /* == JFFS2_NODETYPE_XREF */
+ __u32 offset; /* offset on jeb */
+} __attribute__((packed));
+
+union jffs2_sum_flash
+{
+ struct jffs2_sum_unknown_flash u;
+ struct jffs2_sum_inode_flash i;
+ struct jffs2_sum_dirent_flash d;
+ struct jffs2_sum_xattr_flash x;
+ struct jffs2_sum_xref_flash r;
+};
+
+/* Summary structures used in the memory */
+
+struct jffs2_sum_unknown_mem
+{
+ union jffs2_sum_mem *next;
+ __u16 nodetype; /* node type */
+};
+
+struct jffs2_sum_inode_mem
+{
+ union jffs2_sum_mem *next;
+ __u16 nodetype; /* node type */
+ __u32 inode; /* inode number */
+ __u32 version; /* inode version */
+ __u32 offset; /* offset on jeb */
+ __u32 totlen; /* record length */
+} __attribute__((packed));
+
+struct jffs2_sum_dirent_mem
+{
+ union jffs2_sum_mem *next;
+ __u16 nodetype; /* == JFFS_NODETYPE_DIRENT */
+ __u32 totlen; /* record length */
+ __u32 offset; /* ofset on jeb */
+ __u32 pino; /* parent inode */
+ __u32 version; /* dirent version */
+ __u32 ino; /* == zero for unlink */
+ uint8_t nsize; /* dirent name size */
+ uint8_t type; /* dirent type */
+ uint8_t name[0]; /* dirent name */
+} __attribute__((packed));
+
+struct jffs2_sum_xattr_mem
+{
+ union jffs2_sum_mem *next;
+ __u16 nodetype;
+ __u32 xid;
+ __u32 version;
+ __u32 offset;
+ __u32 totlen;
+} __attribute__((packed));
+
+struct jffs2_sum_xref_mem
+{
+ union jffs2_sum_mem *next;
+ __u16 nodetype;
+ __u32 offset;
+} __attribute__((packed));
+
+union jffs2_sum_mem
+{
+ struct jffs2_sum_unknown_mem u;
+ struct jffs2_sum_inode_mem i;
+ struct jffs2_sum_dirent_mem d;
+ struct jffs2_sum_xattr_mem x;
+ struct jffs2_sum_xref_mem r;
+};
+
+/* Summary related information stored in superblock */
+
+struct jffs2_summary
+{
+ uint32_t sum_size; /* collected summary information for nextblock */
+ uint32_t sum_num;
+ uint32_t sum_padded;
+ union jffs2_sum_mem *sum_list_head;
+ union jffs2_sum_mem *sum_list_tail;
+
+ __u32 *sum_buf; /* buffer for writing out summary */
+};
+
+/* Summary marker is stored at the end of every sumarized erase block */
+
+struct jffs2_sum_marker
+{
+ __u32 offset; /* offset of the summary node in the jeb */
+ __u32 magic; /* == JFFS2_SUM_MAGIC */
+};
+
+#define JFFS2_SUMMARY_FRAME_SIZE (sizeof(struct jffs2_raw_summary) + sizeof(struct jffs2_sum_marker))
+
+#endif /* JFFS2_SUMMARY_H */
generated by cgit v1.2.3 (git 2.0.4) at 2024-07-07 19:38:08 +0000