*
* Copyright (C) 2001-2003 Red Hat, Inc.
*
- * Created by David Woodhouse <dwmw2@redhat.com>
+ * Created by David Woodhouse <dwmw2@infradead.org>
*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: scan.c,v 1.104 2003/10/11 14:52:48 dwmw2 Exp $
+ * $Id: scan.c,v 1.115 2004/11/17 12:59:08 dedekind Exp $
*
*/
#include <linux/kernel.h>
static inline int min_free(struct jffs2_sb_info *c)
{
uint32_t min = 2 * sizeof(struct jffs2_raw_inode);
-#ifdef CONFIG_JFFS2_FS_NAND
+#if defined CONFIG_JFFS2_FS_NAND || defined CONFIG_JFFS2_FS_NOR_ECC
if (!jffs2_can_mark_obsolete(c) && min < c->wbuf_pagesize)
return c->wbuf_pagesize;
#endif
else
buf_size = PAGE_SIZE;
+ /* Respect kmalloc limitations */
+ if (buf_size > 128*1024)
+ buf_size = 128*1024;
+
D1(printk(KERN_DEBUG "Allocating readbuf of %d bytes\n", buf_size));
flashbuf = kmalloc(buf_size, GFP_KERNEL);
if (!flashbuf)
case BLK_STATE_PARTDIRTY:
/* Some data, but not full. Dirty list. */
- /* Except that we want to remember the block with most free space,
- and stick it in the 'nextblock' position to start writing to it.
- Later when we do snapshots, this must be the most recent block,
- not the one with most free space.
- */
+ /* We want to remember the block with most free space
+ and stick it in the 'nextblock' position to start writing to it. */
if (jeb->free_size > min_free(c) &&
(!c->nextblock || c->nextblock->free_size < jeb->free_size)) {
/* Better candidate for the next writes to go to */
c->dirty_size -= c->nextblock->dirty_size;
c->nextblock->dirty_size = 0;
}
-#ifdef CONFIG_JFFS2_FS_NAND
+#if defined CONFIG_JFFS2_FS_NAND || defined CONFIG_JFFS2_FS_NOR_ECC
if (!jffs2_can_mark_obsolete(c) && c->nextblock && (c->nextblock->free_size & (c->wbuf_pagesize-1))) {
/* If we're going to start writing into a block which already
contains data, and the end of the data isn't page-aligned,
}
#endif
if (c->nr_erasing_blocks) {
- if ( !c->used_size && ((empty_blocks+bad_blocks)!= c->nr_blocks || bad_blocks == c->nr_blocks) ) {
+ if ( !c->used_size && ((c->nr_free_blocks+empty_blocks+bad_blocks)!= c->nr_blocks || bad_blocks == c->nr_blocks) ) {
printk(KERN_NOTICE "Cowardly refusing to erase blocks on filesystem with no valid JFFS2 nodes\n");
printk(KERN_NOTICE "empty_blocks %d, bad_blocks %d, c->nr_blocks %d\n",empty_blocks,bad_blocks,c->nr_blocks);
ret = -EIO;
uint32_t hdr_crc, buf_ofs, buf_len;
int err;
int noise = 0;
- int wasempty = 0;
- uint32_t empty_start = 0;
#ifdef CONFIG_JFFS2_FS_NAND
int cleanmarkerfound = 0;
#endif
switch (ret) {
case 0: return cleanmarkerfound ? BLK_STATE_CLEANMARKER : BLK_STATE_ALLFF;
case 1: return BLK_STATE_ALLDIRTY;
- case 2: return BLK_STATE_BADBLOCK; /* case 2/3 are paranoia checks */
- case 3: return BLK_STATE_ALLDIRTY; /* Block has failed to erase min. once */
default: return ret;
}
}
noise = 10;
+scan_more:
while(ofs < jeb->offset + c->sector_size) {
D1(ACCT_PARANOIA_CHECK(jeb));
node = (struct jffs2_unknown_node *)&buf[ofs-buf_ofs];
if (*(uint32_t *)(&buf[ofs-buf_ofs]) == 0xffffffff) {
- uint32_t inbuf_ofs = ofs - buf_ofs + 4;
- uint32_t scanend;
+ uint32_t inbuf_ofs;
+ uint32_t empty_start;
empty_start = ofs;
ofs += 4;
- /* If scanning empty space after only a cleanmarker, don't
- bother scanning the whole block */
- if (unlikely(empty_start == jeb->offset + c->cleanmarker_size &&
- jeb->offset + EMPTY_SCAN_SIZE < buf_ofs + buf_len))
- scanend = jeb->offset + EMPTY_SCAN_SIZE - buf_ofs;
- else
- scanend = buf_len;
-
D1(printk(KERN_DEBUG "Found empty flash at 0x%08x\n", ofs));
- while (inbuf_ofs < scanend) {
- if (*(uint32_t *)(&buf[inbuf_ofs]) != 0xffffffff)
- goto emptyends;
+ more_empty:
+ inbuf_ofs = ofs - buf_ofs;
+ while (inbuf_ofs < buf_len) {
+ if (*(uint32_t *)(&buf[inbuf_ofs]) != 0xffffffff) {
+ printk(KERN_WARNING "Empty flash at 0x%08x ends at 0x%08x\n",
+ empty_start, ofs);
+ DIRTY_SPACE(ofs-empty_start);
+ goto scan_more;
+ }
inbuf_ofs+=4;
ofs += 4;
}
/* Ran off end. */
- D1(printk(KERN_DEBUG "Empty flash ends normally at 0x%08x\n", ofs));
+ D1(printk(KERN_DEBUG "Empty flash to end of buffer at 0x%08x\n", ofs));
- if (buf_ofs == jeb->offset && jeb->used_size == PAD(c->cleanmarker_size) &&
- c->cleanmarker_size && !jeb->first_node->next_in_ino && !jeb->dirty_size)
+ /* If we're only checking the beginning of a block with a cleanmarker,
+ bail now */
+ if (buf_ofs == jeb->offset && jeb->used_size == PAD(c->cleanmarker_size) &&
+ c->cleanmarker_size && !jeb->dirty_size && !jeb->first_node->next_in_ino) {
+ D1(printk(KERN_DEBUG "%d bytes at start of block seems clean... assuming all clean\n", EMPTY_SCAN_SIZE));
return BLK_STATE_CLEANMARKER;
- wasempty = 1;
- continue;
- } else if (wasempty) {
- emptyends:
- printk(KERN_WARNING "Empty flash at 0x%08x ends at 0x%08x\n", empty_start, ofs);
- DIRTY_SPACE(ofs-empty_start);
- wasempty = 0;
- continue;
+ }
+
+ /* See how much more there is to read in this eraseblock... */
+ buf_len = min_t(uint32_t, buf_size, jeb->offset + c->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) */
+ D1(printk(KERN_DEBUG "Empty flash at %08x runs to end of block. Treating as free_space\n",
+ empty_start));
+ break;
+ }
+ D1(printk(KERN_DEBUG "Reading another 0x%x at 0x%08x\n", buf_len, ofs));
+ err = jffs2_fill_scan_buf(c, buf, ofs, buf_len);
+ if (err)
+ return err;
+ buf_ofs = ofs;
+ goto more_empty;
}
if (ofs == jeb->offset && je16_to_cpu(node->magic) == KSAMTIB_CIGAM_2SFFJ) {
marker_ref->next_in_ino = NULL;
marker_ref->next_phys = NULL;
marker_ref->flash_offset = ofs | REF_NORMAL;
- marker_ref->totlen = c->cleanmarker_size;
+ marker_ref->__totlen = c->cleanmarker_size;
jeb->first_node = jeb->last_node = marker_ref;
USED_SPACE(PAD(c->cleanmarker_size));
}
if ((jeb->used_size + jeb->unchecked_size) == PAD(c->cleanmarker_size) && !jeb->dirty_size
- && (!jeb->first_node || jeb->first_node->next_in_ino) )
+ && (!jeb->first_node || !jeb->first_node->next_in_ino) )
return BLK_STATE_CLEANMARKER;
/* move blocks with max 4 byte dirty space to cleanlist */
if (ic)
return ic;
+ if (ino > c->highest_ino)
+ c->highest_ino = ino;
+
ic = jffs2_alloc_inode_cache();
if (!ic) {
printk(KERN_NOTICE "jffs2_scan_make_inode_cache(): allocation of inode cache failed\n");
ic->nodes = (void *)ic;
jffs2_add_ino_cache(c, ic);
if (ino == 1)
- ic->nlink=1;
+ ic->nlink = 1;
return ic;
}
/* Wheee. It worked */
raw->flash_offset = ofs | REF_UNCHECKED;
- raw->totlen = PAD(je32_to_cpu(ri->totlen));
+ raw->__totlen = PAD(je32_to_cpu(ri->totlen));
raw->next_phys = NULL;
raw->next_in_ino = ic->nodes;
return -ENOMEM;
}
- raw->totlen = PAD(je32_to_cpu(rd->totlen));
+ raw->__totlen = PAD(je32_to_cpu(rd->totlen));
raw->flash_offset = ofs | REF_PRISTINE;
raw->next_phys = NULL;
raw->next_in_ino = ic->nodes;
git://git.onelab.eu / linux-2.6.git / blobdiff