/*
* JFFS2 -- Journalling Flash File System, Version 2.
*
- * Copyright (C) 2001-2003 Red Hat, Inc.
- * Copyright (C) 2004 Thomas Gleixner <tglx@linutronix.de>
+ * Copyright © 2001-2007 Red Hat, Inc.
+ * Copyright © 2004 Thomas Gleixner <tglx@linutronix.de>
*
* Created by David Woodhouse <dwmw2@infradead.org>
* Modified debugged and enhanced by Thomas Gleixner <tglx@linutronix.de>
*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: wbuf.c,v 1.97 2005/08/06 04:51:30 nico Exp $
- *
*/
#include <linux/kernel.h>
#include <linux/crc32.h>
#include <linux/mtd/nand.h>
#include <linux/jiffies.h>
+#include <linux/sched.h>
#include "nodelist.h"
static unsigned char *brokenbuf;
#endif
+#define PAGE_DIV(x) ( ((unsigned long)(x) / (unsigned long)(c->wbuf_pagesize)) * (unsigned long)(c->wbuf_pagesize) )
+#define PAGE_MOD(x) ( (unsigned long)(x) % (unsigned long)(c->wbuf_pagesize) )
+
/* max. erase failures before we mark a block bad */
#define MAX_ERASE_FAILURES 2
-/* two seconds timeout for timed wbuf-flushing */
-#define WBUF_FLUSH_TIMEOUT 2 * HZ
-
struct jffs2_inodirty {
uint32_t ino;
struct jffs2_inodirty *next;
jffs2_erase_pending_trigger(c);
}
- /* Adjust its size counts accordingly */
- c->wasted_size += jeb->free_size;
- c->free_size -= jeb->free_size;
- jeb->wasted_size += jeb->free_size;
- jeb->free_size = 0;
+ if (!jffs2_prealloc_raw_node_refs(c, jeb, 1)) {
+ uint32_t oldfree = jeb->free_size;
+
+ jffs2_link_node_ref(c, jeb,
+ (jeb->offset+c->sector_size-oldfree) | REF_OBSOLETE,
+ oldfree, NULL);
+ /* convert to wasted */
+ c->wasted_size += oldfree;
+ jeb->wasted_size += oldfree;
+ c->dirty_size -= oldfree;
+ jeb->dirty_size -= oldfree;
+ }
jffs2_dbg_dump_block_lists_nolock(c);
jffs2_dbg_acct_sanity_check_nolock(c,jeb);
jffs2_dbg_acct_paranoia_check_nolock(c, jeb);
}
+static struct jffs2_raw_node_ref **jffs2_incore_replace_raw(struct jffs2_sb_info *c,
+ struct jffs2_inode_info *f,
+ struct jffs2_raw_node_ref *raw,
+ union jffs2_node_union *node)
+{
+ struct jffs2_node_frag *frag;
+ struct jffs2_full_dirent *fd;
+
+ dbg_noderef("incore_replace_raw: node at %p is {%04x,%04x}\n",
+ node, je16_to_cpu(node->u.magic), je16_to_cpu(node->u.nodetype));
+
+ BUG_ON(je16_to_cpu(node->u.magic) != 0x1985 &&
+ je16_to_cpu(node->u.magic) != 0);
+
+ switch (je16_to_cpu(node->u.nodetype)) {
+ case JFFS2_NODETYPE_INODE:
+ if (f->metadata && f->metadata->raw == raw) {
+ dbg_noderef("Will replace ->raw in f->metadata at %p\n", f->metadata);
+ return &f->metadata->raw;
+ }
+ frag = jffs2_lookup_node_frag(&f->fragtree, je32_to_cpu(node->i.offset));
+ BUG_ON(!frag);
+ /* Find a frag which refers to the full_dnode we want to modify */
+ while (!frag->node || frag->node->raw != raw) {
+ frag = frag_next(frag);
+ BUG_ON(!frag);
+ }
+ dbg_noderef("Will replace ->raw in full_dnode at %p\n", frag->node);
+ return &frag->node->raw;
+
+ case JFFS2_NODETYPE_DIRENT:
+ for (fd = f->dents; fd; fd = fd->next) {
+ if (fd->raw == raw) {
+ dbg_noderef("Will replace ->raw in full_dirent at %p\n", fd);
+ return &fd->raw;
+ }
+ }
+ BUG();
+
+ default:
+ dbg_noderef("Don't care about replacing raw for nodetype %x\n",
+ je16_to_cpu(node->u.nodetype));
+ break;
+ }
+ return NULL;
+}
+
+#ifdef CONFIG_JFFS2_FS_WBUF_VERIFY
+static int jffs2_verify_write(struct jffs2_sb_info *c, unsigned char *buf,
+ uint32_t ofs)
+{
+ int ret;
+ size_t retlen;
+ char *eccstr;
+
+ ret = c->mtd->read(c->mtd, ofs, c->wbuf_pagesize, &retlen, c->wbuf_verify);
+ if (ret && ret != -EUCLEAN && ret != -EBADMSG) {
+ printk(KERN_WARNING "jffs2_verify_write(): Read back of page at %08x failed: %d\n", c->wbuf_ofs, ret);
+ return ret;
+ } else if (retlen != c->wbuf_pagesize) {
+ printk(KERN_WARNING "jffs2_verify_write(): Read back of page at %08x gave short read: %zd not %d.\n", ofs, retlen, c->wbuf_pagesize);
+ return -EIO;
+ }
+ if (!memcmp(buf, c->wbuf_verify, c->wbuf_pagesize))
+ return 0;
+
+ if (ret == -EUCLEAN)
+ eccstr = "corrected";
+ else if (ret == -EBADMSG)
+ eccstr = "correction failed";
+ else
+ eccstr = "OK or unused";
+
+ printk(KERN_WARNING "Write verify error (ECC %s) at %08x. Wrote:\n",
+ eccstr, c->wbuf_ofs);
+ print_hex_dump(KERN_WARNING, "", DUMP_PREFIX_OFFSET, 16, 1,
+ c->wbuf, c->wbuf_pagesize, 0);
+
+ printk(KERN_WARNING "Read back:\n");
+ print_hex_dump(KERN_WARNING, "", DUMP_PREFIX_OFFSET, 16, 1,
+ c->wbuf_verify, c->wbuf_pagesize, 0);
+
+ return -EIO;
+}
+#else
+#define jffs2_verify_write(c,b,o) (0)
+#endif
+
/* Recover from failure to write wbuf. Recover the nodes up to the
* wbuf, not the one which we were starting to try to write. */
static void jffs2_wbuf_recover(struct jffs2_sb_info *c)
{
struct jffs2_eraseblock *jeb, *new_jeb;
- struct jffs2_raw_node_ref **first_raw, **raw;
+ struct jffs2_raw_node_ref *raw, *next, *first_raw = NULL;
size_t retlen;
int ret;
+ int nr_refile = 0;
unsigned char *buf;
uint32_t start, end, ofs, len;
- spin_lock(&c->erase_completion_lock);
-
jeb = &c->blocks[c->wbuf_ofs / c->sector_size];
- jffs2_block_refile(c, jeb, REFILE_NOTEMPTY);
+ spin_lock(&c->erase_completion_lock);
+ if (c->wbuf_ofs % c->mtd->erasesize)
+ jffs2_block_refile(c, jeb, REFILE_NOTEMPTY);
+ else
+ jffs2_block_refile(c, jeb, REFILE_ANYWAY);
+ spin_unlock(&c->erase_completion_lock);
+
+ BUG_ON(!ref_obsolete(jeb->last_node));
/* Find the first node to be recovered, by skipping over every
node which ends before the wbuf starts, or which is obsolete. */
- first_raw = &jeb->first_node;
- while (*first_raw &&
- (ref_obsolete(*first_raw) ||
- (ref_offset(*first_raw)+ref_totlen(c, jeb, *first_raw)) < c->wbuf_ofs)) {
- D1(printk(KERN_DEBUG "Skipping node at 0x%08x(%d)-0x%08x which is either before 0x%08x or obsolete\n",
- ref_offset(*first_raw), ref_flags(*first_raw),
- (ref_offset(*first_raw) + ref_totlen(c, jeb, *first_raw)),
- c->wbuf_ofs));
- first_raw = &(*first_raw)->next_phys;
+ for (next = raw = jeb->first_node; next; raw = next) {
+ next = ref_next(raw);
+
+ if (ref_obsolete(raw) ||
+ (next && ref_offset(next) <= c->wbuf_ofs)) {
+ dbg_noderef("Skipping node at 0x%08x(%d)-0x%08x which is either before 0x%08x or obsolete\n",
+ ref_offset(raw), ref_flags(raw),
+ (ref_offset(raw) + ref_totlen(c, jeb, raw)),
+ c->wbuf_ofs);
+ continue;
+ }
+ dbg_noderef("First node to be recovered is at 0x%08x(%d)-0x%08x\n",
+ ref_offset(raw), ref_flags(raw),
+ (ref_offset(raw) + ref_totlen(c, jeb, raw)));
+
+ first_raw = raw;
+ break;
}
- if (!*first_raw) {
+ if (!first_raw) {
/* All nodes were obsolete. Nothing to recover. */
D1(printk(KERN_DEBUG "No non-obsolete nodes to be recovered. Just filing block bad\n"));
- spin_unlock(&c->erase_completion_lock);
+ c->wbuf_len = 0;
return;
}
- start = ref_offset(*first_raw);
- end = ref_offset(*first_raw) + ref_totlen(c, jeb, *first_raw);
+ start = ref_offset(first_raw);
+ end = ref_offset(jeb->last_node);
+ nr_refile = 1;
- /* Find the last node to be recovered */
- raw = first_raw;
- while ((*raw)) {
- if (!ref_obsolete(*raw))
- end = ref_offset(*raw) + ref_totlen(c, jeb, *raw);
+ /* Count the number of refs which need to be copied */
+ while ((raw = ref_next(raw)) != jeb->last_node)
+ nr_refile++;
- raw = &(*raw)->next_phys;
- }
- spin_unlock(&c->erase_completion_lock);
-
- D1(printk(KERN_DEBUG "wbuf recover %08x-%08x\n", start, end));
+ dbg_noderef("wbuf recover %08x-%08x (%d bytes in %d nodes)\n",
+ start, end, end - start, nr_refile);
buf = NULL;
if (start < c->wbuf_ofs) {
}
/* Do the read... */
- if (jffs2_cleanmarker_oob(c))
- ret = c->mtd->read_ecc(c->mtd, start, c->wbuf_ofs - start, &retlen, buf, NULL, c->oobinfo);
- else
- ret = c->mtd->read(c->mtd, start, c->wbuf_ofs - start, &retlen, buf);
-
- if (ret == -EBADMSG && retlen == c->wbuf_ofs - start) {
- /* ECC recovered */
+ ret = c->mtd->read(c->mtd, start, c->wbuf_ofs - start, &retlen, buf);
+
+ /* ECC recovered ? */
+ if ((ret == -EUCLEAN || ret == -EBADMSG) &&
+ (retlen == c->wbuf_ofs - start))
ret = 0;
- }
+
if (ret || retlen != c->wbuf_ofs - start) {
printk(KERN_CRIT "Old data are already lost in wbuf recovery. Data loss ensues.\n");
kfree(buf);
buf = NULL;
read_failed:
- first_raw = &(*first_raw)->next_phys;
+ first_raw = ref_next(first_raw);
+ nr_refile--;
+ while (first_raw && ref_obsolete(first_raw)) {
+ first_raw = ref_next(first_raw);
+ nr_refile--;
+ }
+
/* If this was the only node to be recovered, give up */
- if (!(*first_raw))
+ if (!first_raw) {
+ c->wbuf_len = 0;
return;
+ }
/* It wasn't. Go on and try to recover nodes complete in the wbuf */
- start = ref_offset(*first_raw);
+ start = ref_offset(first_raw);
+ dbg_noderef("wbuf now recover %08x-%08x (%d bytes in %d nodes)\n",
+ start, end, end - start, nr_refile);
+
} else {
/* Read succeeded. Copy the remaining data from the wbuf */
memcpy(buf + (c->wbuf_ofs - start), c->wbuf, end - c->wbuf_ofs);
/* OK... we're to rewrite (end-start) bytes of data from first_raw onwards.
Either 'buf' contains the data, or we find it in the wbuf */
-
/* ... and get an allocation of space from a shiny new block instead */
- ret = jffs2_reserve_space_gc(c, end-start, &ofs, &len);
+ ret = jffs2_reserve_space_gc(c, end-start, &len, JFFS2_SUMMARY_NOSUM_SIZE);
if (ret) {
printk(KERN_WARNING "Failed to allocate space for wbuf recovery. Data loss ensues.\n");
kfree(buf);
return;
}
+
+ /* The summary is not recovered, so it must be disabled for this erase block */
+ jffs2_sum_disable_collecting(c->summary);
+
+ ret = jffs2_prealloc_raw_node_refs(c, c->nextblock, nr_refile);
+ if (ret) {
+ printk(KERN_WARNING "Failed to allocate node refs for wbuf recovery. Data loss ensues.\n");
+ kfree(buf);
+ return;
+ }
+
+ ofs = write_ofs(c);
+
if (end-start >= c->wbuf_pagesize) {
/* Need to do another write immediately, but it's possible
that this is just because the wbuf itself is completely
- full, and there's nothing earlier read back from the
- flash. Hence 'buf' isn't necessarily what we're writing
+ full, and there's nothing earlier read back from the
+ flash. Hence 'buf' isn't necessarily what we're writing
from. */
unsigned char *rewrite_buf = buf?:c->wbuf;
uint32_t towrite = (end-start) - ((end-start)%c->wbuf_pagesize);
D1(printk(KERN_DEBUG "Write 0x%x bytes at 0x%08x in wbuf recover\n",
towrite, ofs));
-
+
#ifdef BREAKMEHEADER
static int breakme;
if (breakme++ == 20) {
printk(KERN_NOTICE "Faking write error at 0x%08x\n", ofs);
breakme = 0;
- c->mtd->write_ecc(c->mtd, ofs, towrite, &retlen,
- brokenbuf, NULL, c->oobinfo);
+ c->mtd->write(c->mtd, ofs, towrite, &retlen,
+ brokenbuf);
ret = -EIO;
} else
#endif
- if (jffs2_cleanmarker_oob(c))
- ret = c->mtd->write_ecc(c->mtd, ofs, towrite, &retlen,
- rewrite_buf, NULL, c->oobinfo);
- else
- ret = c->mtd->write(c->mtd, ofs, towrite, &retlen, rewrite_buf);
+ ret = c->mtd->write(c->mtd, ofs, towrite, &retlen,
+ rewrite_buf);
- if (ret || retlen != towrite) {
+ if (ret || retlen != towrite || jffs2_verify_write(c, rewrite_buf, ofs)) {
/* Argh. We tried. Really we did. */
printk(KERN_CRIT "Recovery of wbuf failed due to a second write error\n");
kfree(buf);
- if (retlen) {
- struct jffs2_raw_node_ref *raw2;
-
- raw2 = jffs2_alloc_raw_node_ref();
- if (!raw2)
- return;
+ if (retlen)
+ jffs2_add_physical_node_ref(c, ofs | REF_OBSOLETE, ref_totlen(c, jeb, first_raw), NULL);
- raw2->flash_offset = ofs | REF_OBSOLETE;
- raw2->__totlen = ref_totlen(c, jeb, *first_raw);
- raw2->next_phys = NULL;
- raw2->next_in_ino = NULL;
-
- jffs2_add_physical_node_ref(c, raw2);
- }
return;
}
printk(KERN_NOTICE "Recovery of wbuf succeeded to %08x\n", ofs);
c->wbuf_ofs = ofs + towrite;
memmove(c->wbuf, rewrite_buf + towrite, c->wbuf_len);
/* Don't muck about with c->wbuf_inodes. False positives are harmless. */
- if (buf)
- kfree(buf);
} else {
/* OK, now we're left with the dregs in whichever buffer we're using */
if (buf) {
memcpy(c->wbuf, buf, end-start);
- kfree(buf);
} else {
memmove(c->wbuf, c->wbuf + (start - c->wbuf_ofs), end - start);
}
new_jeb = &c->blocks[ofs / c->sector_size];
spin_lock(&c->erase_completion_lock);
- if (new_jeb->first_node) {
- /* Odd, but possible with ST flash later maybe */
- new_jeb->last_node->next_phys = *first_raw;
- } else {
- new_jeb->first_node = *first_raw;
- }
-
- raw = first_raw;
- while (*raw) {
- uint32_t rawlen = ref_totlen(c, jeb, *raw);
+ for (raw = first_raw; raw != jeb->last_node; raw = ref_next(raw)) {
+ uint32_t rawlen = ref_totlen(c, jeb, raw);
+ struct jffs2_inode_cache *ic;
+ struct jffs2_raw_node_ref *new_ref;
+ struct jffs2_raw_node_ref **adjust_ref = NULL;
+ struct jffs2_inode_info *f = NULL;
D1(printk(KERN_DEBUG "Refiling block of %08x at %08x(%d) to %08x\n",
- rawlen, ref_offset(*raw), ref_flags(*raw), ofs));
+ rawlen, ref_offset(raw), ref_flags(raw), ofs));
+
+ ic = jffs2_raw_ref_to_ic(raw);
+
+ /* Ick. This XATTR mess should be fixed shortly... */
+ if (ic && ic->class == RAWNODE_CLASS_XATTR_DATUM) {
+ struct jffs2_xattr_datum *xd = (void *)ic;
+ BUG_ON(xd->node != raw);
+ adjust_ref = &xd->node;
+ raw->next_in_ino = NULL;
+ ic = NULL;
+ } else if (ic && ic->class == RAWNODE_CLASS_XATTR_REF) {
+ struct jffs2_xattr_datum *xr = (void *)ic;
+ BUG_ON(xr->node != raw);
+ adjust_ref = &xr->node;
+ raw->next_in_ino = NULL;
+ ic = NULL;
+ } else if (ic && ic->class == RAWNODE_CLASS_INODE_CACHE) {
+ struct jffs2_raw_node_ref **p = &ic->nodes;
+
+ /* Remove the old node from the per-inode list */
+ while (*p && *p != (void *)ic) {
+ if (*p == raw) {
+ (*p) = (raw->next_in_ino);
+ raw->next_in_ino = NULL;
+ break;
+ }
+ p = &((*p)->next_in_ino);
+ }
- if (ref_obsolete(*raw)) {
- /* Shouldn't really happen much */
- new_jeb->dirty_size += rawlen;
- new_jeb->free_size -= rawlen;
- c->dirty_size += rawlen;
- } else {
- new_jeb->used_size += rawlen;
- new_jeb->free_size -= rawlen;
+ if (ic->state == INO_STATE_PRESENT && !ref_obsolete(raw)) {
+ /* If it's an in-core inode, then we have to adjust any
+ full_dirent or full_dnode structure to point to the
+ new version instead of the old */
+ f = jffs2_gc_fetch_inode(c, ic->ino, !ic->pino_nlink);
+ if (IS_ERR(f)) {
+ /* Should never happen; it _must_ be present */
+ JFFS2_ERROR("Failed to iget() ino #%u, err %ld\n",
+ ic->ino, PTR_ERR(f));
+ BUG();
+ }
+ /* We don't lock f->sem. There's a number of ways we could
+ end up in here with it already being locked, and nobody's
+ going to modify it on us anyway because we hold the
+ alloc_sem. We're only changing one ->raw pointer too,
+ which we can get away with without upsetting readers. */
+ adjust_ref = jffs2_incore_replace_raw(c, f, raw,
+ (void *)(buf?:c->wbuf) + (ref_offset(raw) - start));
+ } else if (unlikely(ic->state != INO_STATE_PRESENT &&
+ ic->state != INO_STATE_CHECKEDABSENT &&
+ ic->state != INO_STATE_GC)) {
+ JFFS2_ERROR("Inode #%u is in strange state %d!\n", ic->ino, ic->state);
+ BUG();
+ }
+ }
+
+ new_ref = jffs2_link_node_ref(c, new_jeb, ofs | ref_flags(raw), rawlen, ic);
+
+ if (adjust_ref) {
+ BUG_ON(*adjust_ref != raw);
+ *adjust_ref = new_ref;
+ }
+ if (f)
+ jffs2_gc_release_inode(c, f);
+
+ if (!ref_obsolete(raw)) {
jeb->dirty_size += rawlen;
jeb->used_size -= rawlen;
c->dirty_size += rawlen;
+ c->used_size -= rawlen;
+ raw->flash_offset = ref_offset(raw) | REF_OBSOLETE;
+ BUG_ON(raw->next_in_ino);
}
- c->free_size -= rawlen;
- (*raw)->flash_offset = ofs | ref_flags(*raw);
ofs += rawlen;
- new_jeb->last_node = *raw;
-
- raw = &(*raw)->next_phys;
}
+ kfree(buf);
+
/* Fix up the original jeb now it's on the bad_list */
- *first_raw = NULL;
- if (first_raw == &jeb->first_node) {
- jeb->last_node = NULL;
+ if (first_raw == jeb->first_node) {
D1(printk(KERN_DEBUG "Failing block at %08x is now empty. Moving to erase_pending_list\n", jeb->offset));
- list_del(&jeb->list);
- list_add(&jeb->list, &c->erase_pending_list);
+ list_move(&jeb->list, &c->erase_pending_list);
c->nr_erasing_blocks++;
jffs2_erase_pending_trigger(c);
}
- else
- jeb->last_node = container_of(first_raw, struct jffs2_raw_node_ref, next_phys);
jffs2_dbg_acct_sanity_check_nolock(c, jeb);
- jffs2_dbg_acct_paranoia_check_nolock(c, jeb);
+ jffs2_dbg_acct_paranoia_check_nolock(c, jeb);
jffs2_dbg_acct_sanity_check_nolock(c, new_jeb);
- jffs2_dbg_acct_paranoia_check_nolock(c, new_jeb);
+ jffs2_dbg_acct_paranoia_check_nolock(c, new_jeb);
spin_unlock(&c->erase_completion_lock);
- D1(printk(KERN_DEBUG "wbuf recovery completed OK\n"));
+ D1(printk(KERN_DEBUG "wbuf recovery completed OK. wbuf_ofs 0x%08x, len 0x%x\n", c->wbuf_ofs, c->wbuf_len));
+
}
/* Meaning of pad argument:
static int __jffs2_flush_wbuf(struct jffs2_sb_info *c, int pad)
{
+ struct jffs2_eraseblock *wbuf_jeb;
int ret;
size_t retlen;
if (!jffs2_is_writebuffered(c))
return 0;
- if (!down_trylock(&c->alloc_sem)) {
- up(&c->alloc_sem);
+ if (mutex_trylock(&c->alloc_sem)) {
+ mutex_unlock(&c->alloc_sem);
printk(KERN_CRIT "jffs2_flush_wbuf() called with alloc_sem not locked!\n");
BUG();
}
if (!c->wbuf_len) /* already checked c->wbuf above */
return 0;
+ wbuf_jeb = &c->blocks[c->wbuf_ofs / c->sector_size];
+ if (jffs2_prealloc_raw_node_refs(c, wbuf_jeb, c->nextblock->allocated_refs + 1))
+ return -ENOMEM;
+
/* claim remaining space on the page
this happens, if we have a change to a new block,
or if fsync forces us to flush the writebuffer.
if we have a switch to next page, we will not have
- enough remaining space for this.
+ enough remaining space for this.
*/
- if (pad && !jffs2_dataflash(c)) {
+ if (pad ) {
c->wbuf_len = PAD(c->wbuf_len);
/* Pad with JFFS2_DIRTY_BITMASK initially. this helps out ECC'd NOR
with 8 byte page size */
memset(c->wbuf + c->wbuf_len, 0, c->wbuf_pagesize - c->wbuf_len);
-
+
if ( c->wbuf_len + sizeof(struct jffs2_unknown_node) < c->wbuf_pagesize) {
struct jffs2_unknown_node *padnode = (void *)(c->wbuf + c->wbuf_len);
padnode->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
}
/* else jffs2_flash_writev has actually filled in the rest of the
buffer for us, and will deal with the node refs etc. later. */
-
+
#ifdef BREAKME
static int breakme;
if (breakme++ == 20) {
printk(KERN_NOTICE "Faking write error at 0x%08x\n", c->wbuf_ofs);
breakme = 0;
- c->mtd->write_ecc(c->mtd, c->wbuf_ofs, c->wbuf_pagesize,
- &retlen, brokenbuf, NULL, c->oobinfo);
+ c->mtd->write(c->mtd, c->wbuf_ofs, c->wbuf_pagesize, &retlen,
+ brokenbuf);
ret = -EIO;
- } else
+ } else
#endif
-
- if (jffs2_cleanmarker_oob(c))
- ret = c->mtd->write_ecc(c->mtd, c->wbuf_ofs, c->wbuf_pagesize, &retlen, c->wbuf, NULL, c->oobinfo);
- else
- ret = c->mtd->write(c->mtd, c->wbuf_ofs, c->wbuf_pagesize, &retlen, c->wbuf);
- if (ret || retlen != c->wbuf_pagesize) {
- if (ret)
- printk(KERN_WARNING "jffs2_flush_wbuf(): Write failed with %d\n",ret);
- else {
- printk(KERN_WARNING "jffs2_flush_wbuf(): Write was short: %zd instead of %d\n",
- retlen, c->wbuf_pagesize);
- ret = -EIO;
- }
+ ret = c->mtd->write(c->mtd, c->wbuf_ofs, c->wbuf_pagesize, &retlen, c->wbuf);
+ if (ret) {
+ printk(KERN_WARNING "jffs2_flush_wbuf(): Write failed with %d\n", ret);
+ goto wfail;
+ } else if (retlen != c->wbuf_pagesize) {
+ printk(KERN_WARNING "jffs2_flush_wbuf(): Write was short: %zd instead of %d\n",
+ retlen, c->wbuf_pagesize);
+ ret = -EIO;
+ goto wfail;
+ } else if ((ret = jffs2_verify_write(c, c->wbuf, c->wbuf_ofs))) {
+ wfail:
jffs2_wbuf_recover(c);
return ret;
}
- spin_lock(&c->erase_completion_lock);
-
/* Adjust free size of the block if we padded. */
- if (pad && !jffs2_dataflash(c)) {
- struct jffs2_eraseblock *jeb;
-
- jeb = &c->blocks[c->wbuf_ofs / c->sector_size];
+ if (pad) {
+ uint32_t waste = c->wbuf_pagesize - c->wbuf_len;
D1(printk(KERN_DEBUG "jffs2_flush_wbuf() adjusting free_size of %sblock at %08x\n",
- (jeb==c->nextblock)?"next":"", jeb->offset));
+ (wbuf_jeb==c->nextblock)?"next":"", wbuf_jeb->offset));
- /* wbuf_pagesize - wbuf_len is the amount of space that's to be
+ /* wbuf_pagesize - wbuf_len is the amount of space that's to be
padded. If there is less free space in the block than that,
something screwed up */
- if (jeb->free_size < (c->wbuf_pagesize - c->wbuf_len)) {
+ if (wbuf_jeb->free_size < waste) {
printk(KERN_CRIT "jffs2_flush_wbuf(): Accounting error. wbuf at 0x%08x has 0x%03x bytes, 0x%03x left.\n",
- c->wbuf_ofs, c->wbuf_len, c->wbuf_pagesize-c->wbuf_len);
+ c->wbuf_ofs, c->wbuf_len, waste);
printk(KERN_CRIT "jffs2_flush_wbuf(): But free_size for block at 0x%08x is only 0x%08x\n",
- jeb->offset, jeb->free_size);
+ wbuf_jeb->offset, wbuf_jeb->free_size);
BUG();
}
- jeb->free_size -= (c->wbuf_pagesize - c->wbuf_len);
- c->free_size -= (c->wbuf_pagesize - c->wbuf_len);
- jeb->wasted_size += (c->wbuf_pagesize - c->wbuf_len);
- c->wasted_size += (c->wbuf_pagesize - c->wbuf_len);
- }
+
+ spin_lock(&c->erase_completion_lock);
+
+ jffs2_link_node_ref(c, wbuf_jeb, (c->wbuf_ofs + c->wbuf_len) | REF_OBSOLETE, waste, NULL);
+ /* FIXME: that made it count as dirty. Convert to wasted */
+ wbuf_jeb->dirty_size -= waste;
+ c->dirty_size -= waste;
+ wbuf_jeb->wasted_size += waste;
+ c->wasted_size += waste;
+ } else
+ spin_lock(&c->erase_completion_lock);
/* Stick any now-obsoleted blocks on the erase_pending_list */
jffs2_refile_wbuf_blocks(c);
return 0;
}
-/* Trigger garbage collection to flush the write-buffer.
+/* Trigger garbage collection to flush the write-buffer.
If ino arg is zero, do it if _any_ real (i.e. not GC) writes are
- outstanding. If ino arg non-zero, do it only if a write for the
+ outstanding. If ino arg non-zero, do it only if a write for the
given inode is outstanding. */
int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino)
{
if (!c->wbuf)
return 0;
- down(&c->alloc_sem);
+ mutex_lock(&c->alloc_sem);
if (!jffs2_wbuf_pending_for_ino(c, ino)) {
D1(printk(KERN_DEBUG "Ino #%d not pending in wbuf. Returning\n", ino));
- up(&c->alloc_sem);
+ mutex_unlock(&c->alloc_sem);
return 0;
}
} else while (old_wbuf_len &&
old_wbuf_ofs == c->wbuf_ofs) {
- up(&c->alloc_sem);
+ mutex_unlock(&c->alloc_sem);
D1(printk(KERN_DEBUG "jffs2_flush_wbuf_gc() calls gc pass\n"));
ret = jffs2_garbage_collect_pass(c);
if (ret) {
/* GC failed. Flush it with padding instead */
- down(&c->alloc_sem);
+ mutex_lock(&c->alloc_sem);
down_write(&c->wbuf_sem);
ret = __jffs2_flush_wbuf(c, PAD_ACCOUNTING);
/* retry flushing wbuf in case jffs2_wbuf_recover
up_write(&c->wbuf_sem);
break;
}
- down(&c->alloc_sem);
+ mutex_lock(&c->alloc_sem);
}
D1(printk(KERN_DEBUG "jffs2_flush_wbuf_gc() ends...\n"));
- up(&c->alloc_sem);
+ mutex_unlock(&c->alloc_sem);
return ret;
}
return ret;
}
-#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
-#define PAGE_DIV(x) ( ((unsigned long)(x) / (unsigned long)(c->wbuf_pagesize)) * (unsigned long)(c->wbuf_pagesize) )
-#define PAGE_MOD(x) ( (unsigned long)(x) % (unsigned long)(c->wbuf_pagesize) )
-#else
-#define PAGE_DIV(x) ( (x) & (~(c->wbuf_pagesize - 1)) )
-#define PAGE_MOD(x) ( (x) & (c->wbuf_pagesize - 1) )
-#endif
+static size_t jffs2_fill_wbuf(struct jffs2_sb_info *c, const uint8_t *buf,
+ size_t len)
+{
+ if (len && !c->wbuf_len && (len >= c->wbuf_pagesize))
+ return 0;
+
+ if (len > (c->wbuf_pagesize - c->wbuf_len))
+ len = c->wbuf_pagesize - c->wbuf_len;
+ memcpy(c->wbuf + c->wbuf_len, buf, len);
+ c->wbuf_len += (uint32_t) len;
+ return len;
+}
-int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *invecs, unsigned long count, loff_t to, size_t *retlen, uint32_t ino)
+int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *invecs,
+ unsigned long count, loff_t to, size_t *retlen,
+ uint32_t ino)
{
- struct kvec outvecs[3];
- uint32_t totlen = 0;
- uint32_t split_ofs = 0;
- uint32_t old_totlen;
- int ret, splitvec = -1;
- int invec, outvec;
- size_t wbuf_retlen;
- unsigned char *wbuf_ptr;
- size_t donelen = 0;
+ struct jffs2_eraseblock *jeb;
+ size_t wbuf_retlen, donelen = 0;
uint32_t outvec_to = to;
+ int ret, invec;
- /* If not NAND flash, don't bother */
+ /* If not writebuffered flash, don't bother */
if (!jffs2_is_writebuffered(c))
return jffs2_flash_direct_writev(c, invecs, count, to, retlen);
-
+
down_write(&c->wbuf_sem);
/* If wbuf_ofs is not initialized, set it to target address */
if (c->wbuf_ofs == 0xFFFFFFFF) {
c->wbuf_ofs = PAGE_DIV(to);
- c->wbuf_len = PAGE_MOD(to);
+ c->wbuf_len = PAGE_MOD(to);
memset(c->wbuf,0xff,c->wbuf_pagesize);
}
- /* Fixup the wbuf if we are moving to a new eraseblock. The checks below
- fail for ECC'd NOR because cleanmarker == 16, so a block starts at
- xxx0010. */
- if (jffs2_nor_ecc(c)) {
- if (((c->wbuf_ofs % c->sector_size) == 0) && !c->wbuf_len) {
- c->wbuf_ofs = PAGE_DIV(to);
- c->wbuf_len = PAGE_MOD(to);
- memset(c->wbuf,0xff,c->wbuf_pagesize);
- }
- }
-
- /* Sanity checks on target address.
- It's permitted to write at PAD(c->wbuf_len+c->wbuf_ofs),
- and it's permitted to write at the beginning of a new
- erase block. Anything else, and you die.
- New block starts at xxx000c (0-b = block header)
- */
+ /*
+ * Sanity checks on target address. It's permitted to write
+ * at PAD(c->wbuf_len+c->wbuf_ofs), and it's permitted to
+ * write at the beginning of a new erase block. Anything else,
+ * and you die. New block starts at xxx000c (0-b = block
+ * header)
+ */
if (SECTOR_ADDR(to) != SECTOR_ADDR(c->wbuf_ofs)) {
/* It's a write to a new block */
if (c->wbuf_len) {
- D1(printk(KERN_DEBUG "jffs2_flash_writev() to 0x%lx causes flush of wbuf at 0x%08x\n", (unsigned long)to, c->wbuf_ofs));
+ D1(printk(KERN_DEBUG "jffs2_flash_writev() to 0x%lx "
+ "causes flush of wbuf at 0x%08x\n",
+ (unsigned long)to, c->wbuf_ofs));
ret = __jffs2_flush_wbuf(c, PAD_NOACCOUNT);
- if (ret) {
- /* the underlying layer has to check wbuf_len to do the cleanup */
- D1(printk(KERN_WARNING "jffs2_flush_wbuf() called from jffs2_flash_writev() failed %d\n", ret));
- *retlen = 0;
- goto exit;
- }
+ if (ret)
+ goto outerr;
}
/* set pointer to new block */
c->wbuf_ofs = PAGE_DIV(to);
- c->wbuf_len = PAGE_MOD(to);
- }
+ c->wbuf_len = PAGE_MOD(to);
+ }
if (to != PAD(c->wbuf_ofs + c->wbuf_len)) {
/* We're not writing immediately after the writebuffer. Bad. */
- printk(KERN_CRIT "jffs2_flash_writev(): Non-contiguous write to %08lx\n", (unsigned long)to);
+ printk(KERN_CRIT "jffs2_flash_writev(): Non-contiguous write "
+ "to %08lx\n", (unsigned long)to);
if (c->wbuf_len)
printk(KERN_CRIT "wbuf was previously %08x-%08x\n",
- c->wbuf_ofs, c->wbuf_ofs+c->wbuf_len);
+ c->wbuf_ofs, c->wbuf_ofs+c->wbuf_len);
BUG();
}
- /* Note outvecs[3] above. We know count is never greater than 2 */
- if (count > 2) {
- printk(KERN_CRIT "jffs2_flash_writev(): count is %ld\n", count);
- BUG();
- }
-
- invec = 0;
- outvec = 0;
-
- /* Fill writebuffer first, if already in use */
- if (c->wbuf_len) {
- uint32_t invec_ofs = 0;
-
- /* adjust alignment offset */
- if (c->wbuf_len != PAGE_MOD(to)) {
- c->wbuf_len = PAGE_MOD(to);
- /* take care of alignment to next page */
- if (!c->wbuf_len)
- c->wbuf_len = c->wbuf_pagesize;
- }
-
- while(c->wbuf_len < c->wbuf_pagesize) {
- uint32_t thislen;
-
- if (invec == count)
- goto alldone;
-
- thislen = c->wbuf_pagesize - c->wbuf_len;
-
- if (thislen >= invecs[invec].iov_len)
- thislen = invecs[invec].iov_len;
-
- invec_ofs = thislen;
-
- memcpy(c->wbuf + c->wbuf_len, invecs[invec].iov_base, thislen);
- c->wbuf_len += thislen;
- donelen += thislen;
- /* Get next invec, if actual did not fill the buffer */
- if (c->wbuf_len < c->wbuf_pagesize)
- invec++;
- }
-
- /* write buffer is full, flush buffer */
- ret = __jffs2_flush_wbuf(c, NOPAD);
- if (ret) {
- /* the underlying layer has to check wbuf_len to do the cleanup */
- D1(printk(KERN_WARNING "jffs2_flush_wbuf() called from jffs2_flash_writev() failed %d\n", ret));
- /* Retlen zero to make sure our caller doesn't mark the space dirty.
- We've already done everything that's necessary */
- *retlen = 0;
- goto exit;
- }
- outvec_to += donelen;
- c->wbuf_ofs = outvec_to;
-
- /* All invecs done ? */
- if (invec == count)
- goto alldone;
-
- /* Set up the first outvec, containing the remainder of the
- invec we partially used */
- if (invecs[invec].iov_len > invec_ofs) {
- outvecs[0].iov_base = invecs[invec].iov_base+invec_ofs;
- totlen = outvecs[0].iov_len = invecs[invec].iov_len-invec_ofs;
- if (totlen > c->wbuf_pagesize) {
- splitvec = outvec;
- split_ofs = outvecs[0].iov_len - PAGE_MOD(totlen);
- }
- outvec++;
- }
- invec++;
- }
-
- /* OK, now we've flushed the wbuf and the start of the bits
- we have been asked to write, now to write the rest.... */
-
- /* totlen holds the amount of data still to be written */
- old_totlen = totlen;
- for ( ; invec < count; invec++,outvec++ ) {
- outvecs[outvec].iov_base = invecs[invec].iov_base;
- totlen += outvecs[outvec].iov_len = invecs[invec].iov_len;
- if (PAGE_DIV(totlen) != PAGE_DIV(old_totlen)) {
- splitvec = outvec;
- split_ofs = outvecs[outvec].iov_len - PAGE_MOD(totlen);
- old_totlen = totlen;
+ /* adjust alignment offset */
+ if (c->wbuf_len != PAGE_MOD(to)) {
+ c->wbuf_len = PAGE_MOD(to);
+ /* take care of alignment to next page */
+ if (!c->wbuf_len) {
+ c->wbuf_len = c->wbuf_pagesize;
+ ret = __jffs2_flush_wbuf(c, NOPAD);
+ if (ret)
+ goto outerr;
}
}
- /* Now the outvecs array holds all the remaining data to write */
- /* Up to splitvec,split_ofs is to be written immediately. The rest
- goes into the (now-empty) wbuf */
+ for (invec = 0; invec < count; invec++) {
+ int vlen = invecs[invec].iov_len;
+ uint8_t *v = invecs[invec].iov_base;
- if (splitvec != -1) {
- uint32_t remainder;
+ wbuf_retlen = jffs2_fill_wbuf(c, v, vlen);
- remainder = outvecs[splitvec].iov_len - split_ofs;
- outvecs[splitvec].iov_len = split_ofs;
-
- /* We did cross a page boundary, so we write some now */
- if (jffs2_cleanmarker_oob(c))
- ret = c->mtd->writev_ecc(c->mtd, outvecs, splitvec+1, outvec_to, &wbuf_retlen, NULL, c->oobinfo);
- else
- ret = jffs2_flash_direct_writev(c, outvecs, splitvec+1, outvec_to, &wbuf_retlen);
-
- if (ret < 0 || wbuf_retlen != PAGE_DIV(totlen)) {
- /* At this point we have no problem,
- c->wbuf is empty. However refile nextblock to avoid
- writing again to same address.
- */
- struct jffs2_eraseblock *jeb;
-
- spin_lock(&c->erase_completion_lock);
-
- jeb = &c->blocks[outvec_to / c->sector_size];
- jffs2_block_refile(c, jeb, REFILE_ANYWAY);
-
- *retlen = 0;
- spin_unlock(&c->erase_completion_lock);
- goto exit;
+ if (c->wbuf_len == c->wbuf_pagesize) {
+ ret = __jffs2_flush_wbuf(c, NOPAD);
+ if (ret)
+ goto outerr;
}
-
+ vlen -= wbuf_retlen;
+ outvec_to += wbuf_retlen;
donelen += wbuf_retlen;
- c->wbuf_ofs = PAGE_DIV(outvec_to) + PAGE_DIV(totlen);
+ v += wbuf_retlen;
+
+ if (vlen >= c->wbuf_pagesize) {
+ ret = c->mtd->write(c->mtd, outvec_to, PAGE_DIV(vlen),
+ &wbuf_retlen, v);
+ if (ret < 0 || wbuf_retlen != PAGE_DIV(vlen))
+ goto outfile;
+
+ vlen -= wbuf_retlen;
+ outvec_to += wbuf_retlen;
+ c->wbuf_ofs = outvec_to;
+ donelen += wbuf_retlen;
+ v += wbuf_retlen;
+ }
- if (remainder) {
- outvecs[splitvec].iov_base += split_ofs;
- outvecs[splitvec].iov_len = remainder;
- } else {
- splitvec++;
+ wbuf_retlen = jffs2_fill_wbuf(c, v, vlen);
+ if (c->wbuf_len == c->wbuf_pagesize) {
+ ret = __jffs2_flush_wbuf(c, NOPAD);
+ if (ret)
+ goto outerr;
}
- } else {
- splitvec = 0;
+ outvec_to += wbuf_retlen;
+ donelen += wbuf_retlen;
}
- /* Now splitvec points to the start of the bits we have to copy
- into the wbuf */
- wbuf_ptr = c->wbuf;
+ /*
+ * If there's a remainder in the wbuf and it's a non-GC write,
+ * remember that the wbuf affects this ino
+ */
+ *retlen = donelen;
- for ( ; splitvec < outvec; splitvec++) {
- /* Don't copy the wbuf into itself */
- if (outvecs[splitvec].iov_base == c->wbuf)
- continue;
- memcpy(wbuf_ptr, outvecs[splitvec].iov_base, outvecs[splitvec].iov_len);
- wbuf_ptr += outvecs[splitvec].iov_len;
- donelen += outvecs[splitvec].iov_len;
+ if (jffs2_sum_active()) {
+ int res = jffs2_sum_add_kvec(c, invecs, count, (uint32_t) to);
+ if (res)
+ return res;
}
- c->wbuf_len = wbuf_ptr - c->wbuf;
-
- /* If there's a remainder in the wbuf and it's a non-GC write,
- remember that the wbuf affects this ino */
-alldone:
- *retlen = donelen;
if (c->wbuf_len && ino)
jffs2_wbuf_dirties_inode(c, ino);
ret = 0;
-
-exit:
+ up_write(&c->wbuf_sem);
+ return ret;
+
+outfile:
+ /*
+ * At this point we have no problem, c->wbuf is empty. However
+ * refile nextblock to avoid writing again to same address.
+ */
+
+ spin_lock(&c->erase_completion_lock);
+
+ jeb = &c->blocks[outvec_to / c->sector_size];
+ jffs2_block_refile(c, jeb, REFILE_ANYWAY);
+
+ spin_unlock(&c->erase_completion_lock);
+
+outerr:
+ *retlen = 0;
up_write(&c->wbuf_sem);
return ret;
}
* This is the entry for flash write.
* Check, if we work on NAND FLASH, if so build an kvec and write it via vritev
*/
-int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf)
+int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len,
+ size_t *retlen, const u_char *buf)
{
struct kvec vecs[1];
if (!jffs2_is_writebuffered(c))
- return c->mtd->write(c->mtd, ofs, len, retlen, buf);
+ return jffs2_flash_direct_write(c, ofs, len, retlen, buf);
vecs[0].iov_base = (unsigned char *) buf;
vecs[0].iov_len = len;
/* Read flash */
down_read(&c->wbuf_sem);
- if (jffs2_cleanmarker_oob(c))
- ret = c->mtd->read_ecc(c->mtd, ofs, len, retlen, buf, NULL, c->oobinfo);
- else
- ret = c->mtd->read(c->mtd, ofs, len, retlen, buf);
-
- if ( (ret == -EBADMSG) && (*retlen == len) ) {
- printk(KERN_WARNING "mtd->read(0x%zx bytes from 0x%llx) returned ECC error\n",
- len, ofs);
- /*
- * We have the raw data without ECC correction in the buffer, maybe
- * we are lucky and all data or parts are correct. We check the node.
- * If data are corrupted node check will sort it out.
- * We keep this block, it will fail on write or erase and the we
- * mark it bad. Or should we do that now? But we should give him a chance.
- * Maybe we had a system crash or power loss before the ecc write or
- * a erase was completed.
+ ret = c->mtd->read(c->mtd, ofs, len, retlen, buf);
+
+ if ( (ret == -EBADMSG || ret == -EUCLEAN) && (*retlen == len) ) {
+ if (ret == -EBADMSG)
+ printk(KERN_WARNING "mtd->read(0x%zx bytes from 0x%llx)"
+ " returned ECC error\n", len, ofs);
+ /*
+ * We have the raw data without ECC correction in the buffer,
+ * maybe we are lucky and all data or parts are correct. We
+ * check the node. If data are corrupted node check will sort
+ * it out. We keep this block, it will fail on write or erase
+ * and the we mark it bad. Or should we do that now? But we
+ * should give him a chance. Maybe we had a system crash or
+ * power loss before the ecc write or a erase was completed.
* So we return success. :)
*/
- ret = 0;
- }
+ ret = 0;
+ }
/* if no writebuffer available or write buffer empty, return */
if (!c->wbuf_pagesize || !c->wbuf_len)
if (owbf > c->wbuf_len) /* is read beyond write buffer ? */
goto exit;
lwbf = c->wbuf_len - owbf; /* number of bytes to copy */
- if (lwbf > len)
+ if (lwbf > len)
lwbf = len;
- } else {
+ } else {
orbf = (c->wbuf_ofs - ofs); /* offset in read buffer */
if (orbf > len) /* is write beyond write buffer ? */
goto exit;
- lwbf = len - orbf; /* number of bytes to copy */
- if (lwbf > c->wbuf_len)
+ lwbf = len - orbf; /* number of bytes to copy */
+ if (lwbf > c->wbuf_len)
lwbf = c->wbuf_len;
- }
+ }
if (lwbf > 0)
memcpy(buf+orbf,c->wbuf+owbf,lwbf);
return ret;
}
+#define NR_OOB_SCAN_PAGES 4
+
+/* For historical reasons we use only 8 bytes for OOB clean marker */
+#define OOB_CM_SIZE 8
+
+static const struct jffs2_unknown_node oob_cleanmarker =
+{
+ .magic = constant_cpu_to_je16(JFFS2_MAGIC_BITMASK),
+ .nodetype = constant_cpu_to_je16(JFFS2_NODETYPE_CLEANMARKER),
+ .totlen = constant_cpu_to_je32(8)
+};
+
/*
- * Check, if the out of band area is empty
+ * Check, if the out of band area is empty. This function knows about the clean
+ * marker and if it is present in OOB, treats the OOB as empty anyway.
*/
-int jffs2_check_oob_empty( struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, int mode)
+int jffs2_check_oob_empty(struct jffs2_sb_info *c,
+ struct jffs2_eraseblock *jeb, int mode)
{
- unsigned char *buf;
- int ret = 0;
- int i,len,page;
- size_t retlen;
- int oob_size;
-
- /* allocate a buffer for all oob data in this sector */
- oob_size = c->mtd->oobsize;
- len = 4 * oob_size;
- buf = kmalloc(len, GFP_KERNEL);
- if (!buf) {
- printk(KERN_NOTICE "jffs2_check_oob_empty(): allocation of temporary data buffer for oob check failed\n");
- return -ENOMEM;
- }
- /*
- * if mode = 0, we scan for a total empty oob area, else we have
- * to take care of the cleanmarker in the first page of the block
- */
- ret = jffs2_flash_read_oob(c, jeb->offset, len , &retlen, buf);
- if (ret) {
- D1(printk(KERN_WARNING "jffs2_check_oob_empty(): Read OOB failed %d for block at %08x\n", ret, jeb->offset));
- goto out;
- }
-
- if (retlen < len) {
- D1(printk(KERN_WARNING "jffs2_check_oob_empty(): Read OOB return short read "
- "(%zd bytes not %d) for block at %08x\n", retlen, len, jeb->offset));
- ret = -EIO;
- goto out;
+ int i, ret;
+ int cmlen = min_t(int, c->oobavail, OOB_CM_SIZE);
+ struct mtd_oob_ops ops;
+
+ ops.mode = MTD_OOB_AUTO;
+ ops.ooblen = NR_OOB_SCAN_PAGES * c->oobavail;
+ ops.oobbuf = c->oobbuf;
+ ops.len = ops.ooboffs = ops.retlen = ops.oobretlen = 0;
+ ops.datbuf = NULL;
+
+ ret = c->mtd->read_oob(c->mtd, jeb->offset, &ops);
+ if (ret || ops.oobretlen != ops.ooblen) {
+ printk(KERN_ERR "cannot read OOB for EB at %08x, requested %zd"
+ " bytes, read %zd bytes, error %d\n",
+ jeb->offset, ops.ooblen, ops.oobretlen, ret);
+ if (!ret)
+ ret = -EIO;
+ return ret;
}
-
- /* Special check for first page */
- for(i = 0; i < oob_size ; i++) {
- /* Yeah, we know about the cleanmarker. */
- if (mode && i >= c->fsdata_pos &&
- i < c->fsdata_pos + c->fsdata_len)
- continue;
- if (buf[i] != 0xFF) {
- D2(printk(KERN_DEBUG "Found %02x at %x in OOB for %08x\n",
- buf[i], i, jeb->offset));
- ret = 1;
- goto out;
- }
- }
+ for(i = 0; i < ops.ooblen; i++) {
+ if (mode && i < cmlen)
+ /* Yeah, we know about the cleanmarker */
+ continue;
- /* we know, we are aligned :) */
- for (page = oob_size; page < len; page += sizeof(long)) {
- unsigned long dat = *(unsigned long *)(&buf[page]);
- if(dat != -1) {
- ret = 1;
- goto out;
+ if (ops.oobbuf[i] != 0xFF) {
+ D2(printk(KERN_DEBUG "Found %02x at %x in OOB for "
+ "%08x\n", ops.oobbuf[i], i, jeb->offset));
+ return 1;
}
}
-out:
- kfree(buf);
-
- return ret;
+ return 0;
}
/*
-* Scan for a valid cleanmarker and for bad blocks
-* For virtual blocks (concatenated physical blocks) check the cleanmarker
-* only in the first page of the first physical block, but scan for bad blocks in all
-* physical blocks
-*/
-int jffs2_check_nand_cleanmarker (struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb)
+ * Check for a valid cleanmarker.
+ * Returns: 0 if a valid cleanmarker was found
+ * 1 if no cleanmarker was found
+ * negative error code if an error occurred
+ */
+int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c,
+ struct jffs2_eraseblock *jeb)
{
- struct jffs2_unknown_node n;
- unsigned char buf[2 * NAND_MAX_OOBSIZE];
- unsigned char *p;
- int ret, i, cnt, retval = 0;
- size_t retlen, offset;
- int oob_size;
-
- offset = jeb->offset;
- oob_size = c->mtd->oobsize;
-
- /* Loop through the physical blocks */
- for (cnt = 0; cnt < (c->sector_size / c->mtd->erasesize); cnt++) {
- /* Check first if the block is bad. */
- if (c->mtd->block_isbad (c->mtd, offset)) {
- D1 (printk (KERN_WARNING "jffs2_check_nand_cleanmarker(): Bad block at %08x\n", jeb->offset));
- return 2;
- }
- /*
- * We read oob data from page 0 and 1 of the block.
- * page 0 contains cleanmarker and badblock info
- * page 1 contains failure count of this block
- */
- ret = c->mtd->read_oob (c->mtd, offset, oob_size << 1, &retlen, buf);
-
- if (ret) {
- D1 (printk (KERN_WARNING "jffs2_check_nand_cleanmarker(): Read OOB failed %d for block at %08x\n", ret, jeb->offset));
- return ret;
- }
- if (retlen < (oob_size << 1)) {
- D1 (printk (KERN_WARNING "jffs2_check_nand_cleanmarker(): Read OOB return short read (%zd bytes not %d) for block at %08x\n", retlen, oob_size << 1, jeb->offset));
- return -EIO;
- }
-
- /* Check cleanmarker only on the first physical block */
- if (!cnt) {
- n.magic = cpu_to_je16 (JFFS2_MAGIC_BITMASK);
- n.nodetype = cpu_to_je16 (JFFS2_NODETYPE_CLEANMARKER);
- n.totlen = cpu_to_je32 (8);
- p = (unsigned char *) &n;
-
- for (i = 0; i < c->fsdata_len; i++) {
- if (buf[c->fsdata_pos + i] != p[i]) {
- retval = 1;
- }
- }
- D1(if (retval == 1) {
- printk(KERN_WARNING "jffs2_check_nand_cleanmarker(): Cleanmarker node not detected in block at %08x\n", jeb->offset);
- printk(KERN_WARNING "OOB at %08x was ", offset);
- for (i=0; i < oob_size; i++) {
- printk("%02x ", buf[i]);
- }
- printk("\n");
- })
- }
- offset += c->mtd->erasesize;
+ struct mtd_oob_ops ops;
+ int ret, cmlen = min_t(int, c->oobavail, OOB_CM_SIZE);
+
+ ops.mode = MTD_OOB_AUTO;
+ ops.ooblen = cmlen;
+ ops.oobbuf = c->oobbuf;
+ ops.len = ops.ooboffs = ops.retlen = ops.oobretlen = 0;
+ ops.datbuf = NULL;
+
+ ret = c->mtd->read_oob(c->mtd, jeb->offset, &ops);
+ if (ret || ops.oobretlen != ops.ooblen) {
+ printk(KERN_ERR "cannot read OOB for EB at %08x, requested %zd"
+ " bytes, read %zd bytes, error %d\n",
+ jeb->offset, ops.ooblen, ops.oobretlen, ret);
+ if (!ret)
+ ret = -EIO;
+ return ret;
}
- return retval;
+
+ return !!memcmp(&oob_cleanmarker, c->oobbuf, cmlen);
}
-int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb)
+int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c,
+ struct jffs2_eraseblock *jeb)
{
- struct jffs2_unknown_node n;
- int ret;
- size_t retlen;
-
- n.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
- n.nodetype = cpu_to_je16(JFFS2_NODETYPE_CLEANMARKER);
- n.totlen = cpu_to_je32(8);
-
- ret = jffs2_flash_write_oob(c, jeb->offset + c->fsdata_pos, c->fsdata_len, &retlen, (unsigned char *)&n);
-
- if (ret) {
- D1(printk(KERN_WARNING "jffs2_write_nand_cleanmarker(): Write failed for block at %08x: error %d\n", jeb->offset, ret));
- return ret;
- }
- if (retlen != c->fsdata_len) {
- D1(printk(KERN_WARNING "jffs2_write_nand_cleanmarker(): Short write for block at %08x: %zd not %d\n", jeb->offset, retlen, c->fsdata_len));
+ int ret;
+ struct mtd_oob_ops ops;
+ int cmlen = min_t(int, c->oobavail, OOB_CM_SIZE);
+
+ ops.mode = MTD_OOB_AUTO;
+ ops.ooblen = cmlen;
+ ops.oobbuf = (uint8_t *)&oob_cleanmarker;
+ ops.len = ops.ooboffs = ops.retlen = ops.oobretlen = 0;
+ ops.datbuf = NULL;
+
+ ret = c->mtd->write_oob(c->mtd, jeb->offset, &ops);
+ if (ret || ops.oobretlen != ops.ooblen) {
+ printk(KERN_ERR "cannot write OOB for EB at %08x, requested %zd"
+ " bytes, read %zd bytes, error %d\n",
+ jeb->offset, ops.ooblen, ops.oobretlen, ret);
+ if (!ret)
+ ret = -EIO;
return ret;
}
+
return 0;
}
-/*
+/*
* On NAND we try to mark this block bad. If the block was erased more
* than MAX_ERASE_FAILURES we mark it finaly bad.
* Don't care about failures. This block remains on the erase-pending
if (!c->mtd->block_markbad)
return 1; // What else can we do?
- D1(printk(KERN_WARNING "jffs2_write_nand_badblock(): Marking bad block at %08x\n", bad_offset));
+ printk(KERN_WARNING "JFFS2: marking eraseblock at %08x\n as bad", bad_offset);
ret = c->mtd->block_markbad(c->mtd, bad_offset);
-
+
if (ret) {
D1(printk(KERN_WARNING "jffs2_write_nand_badblock(): Write failed for block at %08x: error %d\n", jeb->offset, ret));
return ret;
return 1;
}
-#define NAND_JFFS2_OOB16_FSDALEN 8
-
-static struct nand_oobinfo jffs2_oobinfo_docecc = {
- .useecc = MTD_NANDECC_PLACE,
- .eccbytes = 6,
- .eccpos = {0,1,2,3,4,5}
-};
-
-
-static int jffs2_nand_set_oobinfo(struct jffs2_sb_info *c)
+int jffs2_nand_flash_setup(struct jffs2_sb_info *c)
{
- struct nand_oobinfo *oinfo = &c->mtd->oobinfo;
+ struct nand_ecclayout *oinfo = c->mtd->ecclayout;
- /* Do this only, if we have an oob buffer */
if (!c->mtd->oobsize)
return 0;
-
+
/* Cleanmarker is out-of-band, so inline size zero */
c->cleanmarker_size = 0;
- /* Should we use autoplacement ? */
- if (oinfo && oinfo->useecc == MTD_NANDECC_AUTOPLACE) {
- D1(printk(KERN_DEBUG "JFFS2 using autoplace on NAND\n"));
- /* Get the position of the free bytes */
- if (!oinfo->oobfree[0][1]) {
- printk (KERN_WARNING "jffs2_nand_set_oobinfo(): Eeep. Autoplacement selected and no empty space in oob\n");
- return -ENOSPC;
- }
- c->fsdata_pos = oinfo->oobfree[0][0];
- c->fsdata_len = oinfo->oobfree[0][1];
- if (c->fsdata_len > 8)
- c->fsdata_len = 8;
- } else {
- /* This is just a legacy fallback and should go away soon */
- switch(c->mtd->ecctype) {
- case MTD_ECC_RS_DiskOnChip:
- printk(KERN_WARNING "JFFS2 using DiskOnChip hardware ECC without autoplacement. Fix it!\n");
- c->oobinfo = &jffs2_oobinfo_docecc;
- c->fsdata_pos = 6;
- c->fsdata_len = NAND_JFFS2_OOB16_FSDALEN;
- c->badblock_pos = 15;
- break;
-
- default:
- D1(printk(KERN_DEBUG "JFFS2 on NAND. No autoplacment info found\n"));
- return -EINVAL;
- }
+ if (!oinfo || oinfo->oobavail == 0) {
+ printk(KERN_ERR "inconsistent device description\n");
+ return -EINVAL;
}
- return 0;
-}
-int jffs2_nand_flash_setup(struct jffs2_sb_info *c)
-{
- int res;
+ D1(printk(KERN_DEBUG "JFFS2 using OOB on NAND\n"));
+
+ c->oobavail = oinfo->oobavail;
/* Initialise write buffer */
init_rwsem(&c->wbuf_sem);
- c->wbuf_pagesize = c->mtd->oobblock;
+ c->wbuf_pagesize = c->mtd->writesize;
c->wbuf_ofs = 0xFFFFFFFF;
-
+
c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL);
if (!c->wbuf)
return -ENOMEM;
- res = jffs2_nand_set_oobinfo(c);
+ c->oobbuf = kmalloc(NR_OOB_SCAN_PAGES * c->oobavail, GFP_KERNEL);
+ if (!c->oobbuf) {
+ kfree(c->wbuf);
+ return -ENOMEM;
+ }
-#ifdef BREAKME
- if (!brokenbuf)
- brokenbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL);
- if (!brokenbuf) {
+#ifdef CONFIG_JFFS2_FS_WBUF_VERIFY
+ c->wbuf_verify = kmalloc(c->wbuf_pagesize, GFP_KERNEL);
+ if (!c->wbuf_verify) {
+ kfree(c->oobbuf);
kfree(c->wbuf);
return -ENOMEM;
}
- memset(brokenbuf, 0xdb, c->wbuf_pagesize);
#endif
- return res;
+ return 0;
}
void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c)
{
+#ifdef CONFIG_JFFS2_FS_WBUF_VERIFY
+ kfree(c->wbuf_verify);
+#endif
kfree(c->wbuf);
+ kfree(c->oobbuf);
}
int jffs2_dataflash_setup(struct jffs2_sb_info *c) {
c->cleanmarker_size = 0; /* No cleanmarkers needed */
-
+
/* Initialize write buffer */
init_rwsem(&c->wbuf_sem);
- c->wbuf_pagesize = c->sector_size;
- c->wbuf_ofs = 0xFFFFFFFF;
+
+ c->wbuf_pagesize = c->mtd->erasesize;
+
+ /* Find a suitable c->sector_size
+ * - Not too much sectors
+ * - Sectors have to be at least 4 K + some bytes
+ * - All known dataflashes have erase sizes of 528 or 1056
+ * - we take at least 8 eraseblocks and want to have at least 8K size
+ * - The concatenation should be a power of 2
+ */
+
+ c->sector_size = 8 * c->mtd->erasesize;
+
+ while (c->sector_size < 8192) {
+ c->sector_size *= 2;
+ }
+
+ /* It may be necessary to adjust the flash size */
+ c->flash_size = c->mtd->size;
+
+ if ((c->flash_size % c->sector_size) != 0) {
+ c->flash_size = (c->flash_size / c->sector_size) * c->sector_size;
+ printk(KERN_WARNING "JFFS2 flash size adjusted to %dKiB\n", c->flash_size);
+ };
+
+ c->wbuf_ofs = 0xFFFFFFFF;
c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL);
if (!c->wbuf)
return -ENOMEM;
- printk(KERN_INFO "JFFS2 write-buffering enabled (%i)\n", c->wbuf_pagesize);
+#ifdef CONFIG_JFFS2_FS_WBUF_VERIFY
+ c->wbuf_verify = kmalloc(c->wbuf_pagesize, GFP_KERNEL);
+ if (!c->wbuf_verify) {
+ kfree(c->oobbuf);
+ kfree(c->wbuf);
+ return -ENOMEM;
+ }
+#endif
+
+ printk(KERN_INFO "JFFS2 write-buffering enabled buffer (%d) erasesize (%d)\n", c->wbuf_pagesize, c->sector_size);
return 0;
}
void jffs2_dataflash_cleanup(struct jffs2_sb_info *c) {
+#ifdef CONFIG_JFFS2_FS_WBUF_VERIFY
+ kfree(c->wbuf_verify);
+#endif
kfree(c->wbuf);
}
-int jffs2_nor_ecc_flash_setup(struct jffs2_sb_info *c) {
- /* Cleanmarker is actually larger on the flashes */
- c->cleanmarker_size = 16;
+int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c) {
+ /* Cleanmarker currently occupies whole programming regions,
+ * either one or 2 for 8Byte STMicro flashes. */
+ c->cleanmarker_size = max(16u, c->mtd->writesize);
/* Initialize write buffer */
init_rwsem(&c->wbuf_sem);
- c->wbuf_pagesize = c->mtd->eccsize;
+ c->wbuf_pagesize = c->mtd->writesize;
c->wbuf_ofs = 0xFFFFFFFF;
c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL);
if (!c->wbuf)
return -ENOMEM;
+#ifdef CONFIG_JFFS2_FS_WBUF_VERIFY
+ c->wbuf_verify = kmalloc(c->wbuf_pagesize, GFP_KERNEL);
+ if (!c->wbuf_verify) {
+ kfree(c->wbuf);
+ return -ENOMEM;
+ }
+#endif
return 0;
}
-void jffs2_nor_ecc_flash_cleanup(struct jffs2_sb_info *c) {
+void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c) {
+#ifdef CONFIG_JFFS2_FS_WBUF_VERIFY
+ kfree(c->wbuf_verify);
+#endif
kfree(c->wbuf);
}
-int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c) {
- /* Cleanmarker currently occupies a whole programming region */
- c->cleanmarker_size = MTD_PROGREGION_SIZE(c->mtd);
+int jffs2_ubivol_setup(struct jffs2_sb_info *c) {
+ c->cleanmarker_size = 0;
+
+ if (c->mtd->writesize == 1)
+ /* We do not need write-buffer */
+ return 0;
- /* Initialize write buffer */
init_rwsem(&c->wbuf_sem);
- c->wbuf_pagesize = MTD_PROGREGION_SIZE(c->mtd);
- c->wbuf_ofs = 0xFFFFFFFF;
+ c->wbuf_pagesize = c->mtd->writesize;
+ c->wbuf_ofs = 0xFFFFFFFF;
c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL);
if (!c->wbuf)
return -ENOMEM;
+ printk(KERN_INFO "JFFS2 write-buffering enabled buffer (%d) erasesize (%d)\n", c->wbuf_pagesize, c->sector_size);
+
return 0;
}
-void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c) {
+void jffs2_ubivol_cleanup(struct jffs2_sb_info *c) {
kfree(c->wbuf);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff