/*
* JFFS2 -- Journalling Flash File System, Version 2.
*
- * Copyright (C) 2001-2003 Red Hat, Inc.
+ * Copyright © 2001-2007 Red Hat, Inc.
*
* Created by David Woodhouse <dwmw2@infradead.org>
*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: scan.c,v 1.125 2005/09/30 13:59:13 dedekind Exp $
- *
*/
+
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/slab.h>
static int jffs2_scan_eraseblock (struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
unsigned char *buf, uint32_t buf_size, struct jffs2_summary *s);
-/* These helper functions _must_ increase ofs and also do the dirty/used space accounting.
+/* These helper functions _must_ increase ofs and also do the dirty/used space accounting.
* Returning an error will abort the mount - bad checksums etc. should just mark the space
* as dirty.
*/
-static int jffs2_scan_inode_node(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
+static int jffs2_scan_inode_node(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
struct jffs2_raw_inode *ri, uint32_t ofs, struct jffs2_summary *s);
static int jffs2_scan_dirent_node(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
struct jffs2_raw_dirent *rd, uint32_t ofs, struct jffs2_summary *s);
return DEFAULT_EMPTY_SCAN_SIZE;
}
+static int file_dirty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb)
+{
+ int ret;
+
+ if ((ret = jffs2_prealloc_raw_node_refs(c, jeb, 1)))
+ return ret;
+ if ((ret = jffs2_scan_dirty_space(c, jeb, jeb->free_size)))
+ return ret;
+ /* Turned wasted size into dirty, since we apparently
+ think it's recoverable now. */
+ jeb->dirty_size += jeb->wasted_size;
+ c->dirty_size += jeb->wasted_size;
+ c->wasted_size -= jeb->wasted_size;
+ jeb->wasted_size = 0;
+ if (VERYDIRTY(c, jeb->dirty_size)) {
+ list_add(&jeb->list, &c->very_dirty_list);
+ } else {
+ list_add(&jeb->list, &c->dirty_list);
+ }
+ return 0;
+}
+
int jffs2_scan_medium(struct jffs2_sb_info *c)
{
int i, ret;
size_t pointlen;
if (c->mtd->point) {
- ret = c->mtd->point (c->mtd, 0, c->mtd->size, &pointlen, &flashbuf);
+ ret = c->mtd->point(c->mtd, 0, c->mtd->size, &pointlen,
+ (void **)&flashbuf, NULL);
if (!ret && pointlen < c->mtd->size) {
/* Don't muck about if it won't let us point to the whole flash */
D1(printk(KERN_DEBUG "MTD point returned len too short: 0x%zx\n", pointlen));
- c->mtd->unpoint(c->mtd, flashbuf, 0, c->mtd->size);
+ c->mtd->unpoint(c->mtd, 0, pointlen);
flashbuf = NULL;
}
if (ret)
}
if (jffs2_sum_active()) {
- s = kmalloc(sizeof(struct jffs2_summary), GFP_KERNEL);
+ s = kzalloc(sizeof(struct jffs2_summary), GFP_KERNEL);
if (!s) {
JFFS2_WARNING("Can't allocate memory for summary\n");
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto out;
}
- memset(s, 0, sizeof(struct jffs2_summary));
}
for (i=0; i<c->nr_blocks; i++) {
struct jffs2_eraseblock *jeb = &c->blocks[i];
+ cond_resched();
+
/* reset summary info for next eraseblock scan */
jffs2_sum_reset_collected(s);
/* Now decide which list to put it on */
switch(ret) {
case BLK_STATE_ALLFF:
- /*
- * Empty block. Since we can't be sure it
+ /*
+ * Empty block. Since we can't be sure it
* was entirely erased, we just queue it for erase
* again. It will be marked as such when the erase
* is complete. Meanwhile we still count it as empty
(!c->nextblock || c->nextblock->free_size < jeb->free_size)) {
/* Better candidate for the next writes to go to */
if (c->nextblock) {
- c->nextblock->dirty_size += c->nextblock->free_size + c->nextblock->wasted_size;
- c->dirty_size += c->nextblock->free_size + c->nextblock->wasted_size;
- c->free_size -= c->nextblock->free_size;
- c->wasted_size -= c->nextblock->wasted_size;
- c->nextblock->free_size = c->nextblock->wasted_size = 0;
- if (VERYDIRTY(c, c->nextblock->dirty_size)) {
- list_add(&c->nextblock->list, &c->very_dirty_list);
- } else {
- list_add(&c->nextblock->list, &c->dirty_list);
- }
+ ret = file_dirty(c, c->nextblock);
+ if (ret)
+ goto out;
/* deleting summary information of the old nextblock */
jffs2_sum_reset_collected(c->summary);
}
- /* update collected summary infromation for the current nextblock */
+ /* update collected summary information for the current nextblock */
jffs2_sum_move_collected(c, s);
D1(printk(KERN_DEBUG "jffs2_scan_medium(): new nextblock = 0x%08x\n", jeb->offset));
c->nextblock = jeb;
} else {
- jeb->dirty_size += jeb->free_size + jeb->wasted_size;
- c->dirty_size += jeb->free_size + jeb->wasted_size;
- c->free_size -= jeb->free_size;
- c->wasted_size -= jeb->wasted_size;
- jeb->free_size = jeb->wasted_size = 0;
- if (VERYDIRTY(c, jeb->dirty_size)) {
- list_add(&jeb->list, &c->very_dirty_list);
- } else {
- list_add(&jeb->list, &c->dirty_list);
- }
+ ret = file_dirty(c, jeb);
+ if (ret)
+ goto out;
}
break;
}
}
- if (jffs2_sum_active() && s)
- kfree(s);
-
/* Nextblock dirty is always seen as wasted, because we cannot recycle it now */
if (c->nextblock && (c->nextblock->dirty_size)) {
c->nextblock->wasted_size += c->nextblock->dirty_size;
c->nextblock->dirty_size = 0;
}
#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
- if (!jffs2_can_mark_obsolete(c) && c->nextblock && (c->nextblock->free_size % c->wbuf_pagesize)) {
- /* If we're going to start writing into a block which already
+ if (!jffs2_can_mark_obsolete(c) && c->wbuf_pagesize && c->nextblock && (c->nextblock->free_size % c->wbuf_pagesize)) {
+ /* If we're going to start writing into a block which already
contains data, and the end of the data isn't page-aligned,
skip a little and align it. */
D1(printk(KERN_DEBUG "jffs2_scan_medium(): Skipping %d bytes in nextblock to ensure page alignment\n",
skip));
- c->nextblock->wasted_size += skip;
- c->wasted_size += skip;
-
- c->nextblock->free_size -= skip;
- c->free_size -= skip;
+ jffs2_prealloc_raw_node_refs(c, c->nextblock, 1);
+ jffs2_scan_dirty_space(c, c->nextblock, skip);
}
#endif
if (c->nr_erasing_blocks) {
- if ( !c->used_size && ((c->nr_free_blocks+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;
if (buf_size)
kfree(flashbuf);
#ifndef __ECOS
- else
- c->mtd->unpoint(c->mtd, flashbuf, 0, c->mtd->size);
+ else
+ c->mtd->unpoint(c->mtd, 0, c->mtd->size);
#endif
+ if (s)
+ kfree(s);
+
return ret;
}
-int jffs2_fill_scan_buf (struct jffs2_sb_info *c, void *buf,
- uint32_t ofs, uint32_t len)
+static int jffs2_fill_scan_buf(struct jffs2_sb_info *c, void *buf,
+ uint32_t ofs, uint32_t len)
{
int ret;
size_t retlen;
D1(printk(KERN_WARNING "Read at 0x%x gave only 0x%zx bytes\n", ofs, retlen));
return -EIO;
}
- D2(printk(KERN_DEBUG "Read 0x%x bytes from 0x%08x into buf\n", len, ofs));
- D2(printk(KERN_DEBUG "000: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
- buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6], buf[7], buf[8], buf[9], buf[10], buf[11], buf[12], buf[13], buf[14], buf[15]));
return 0;
}
int jffs2_scan_classify_jeb(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb)
{
if ((jeb->used_size + jeb->unchecked_size) == PAD(c->cleanmarker_size) && !jeb->dirty_size
- && (!jeb->first_node || !jeb->first_node->next_phys) )
+ && (!jeb->first_node || !ref_next(jeb->first_node)) )
return BLK_STATE_CLEANMARKER;
/* move blocks with max 4 byte dirty space to cleanlist */
return BLK_STATE_ALLDIRTY;
}
+#ifdef CONFIG_JFFS2_FS_XATTR
+static int jffs2_scan_xattr_node(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
+ struct jffs2_raw_xattr *rx, uint32_t ofs,
+ struct jffs2_summary *s)
+{
+ struct jffs2_xattr_datum *xd;
+ uint32_t xid, version, totlen, crc;
+ int err;
+
+ crc = crc32(0, rx, sizeof(struct jffs2_raw_xattr) - 4);
+ if (crc != je32_to_cpu(rx->node_crc)) {
+ JFFS2_WARNING("node CRC failed at %#08x, read=%#08x, calc=%#08x\n",
+ ofs, je32_to_cpu(rx->node_crc), crc);
+ if ((err = jffs2_scan_dirty_space(c, jeb, je32_to_cpu(rx->totlen))))
+ return err;
+ return 0;
+ }
+
+ xid = je32_to_cpu(rx->xid);
+ version = je32_to_cpu(rx->version);
+
+ totlen = PAD(sizeof(struct jffs2_raw_xattr)
+ + rx->name_len + 1 + je16_to_cpu(rx->value_len));
+ if (totlen != je32_to_cpu(rx->totlen)) {
+ JFFS2_WARNING("node length mismatch at %#08x, read=%u, calc=%u\n",
+ ofs, je32_to_cpu(rx->totlen), totlen);
+ if ((err = jffs2_scan_dirty_space(c, jeb, je32_to_cpu(rx->totlen))))
+ return err;
+ return 0;
+ }
+
+ xd = jffs2_setup_xattr_datum(c, xid, version);
+ if (IS_ERR(xd))
+ return PTR_ERR(xd);
+
+ if (xd->version > version) {
+ struct jffs2_raw_node_ref *raw
+ = jffs2_link_node_ref(c, jeb, ofs | REF_PRISTINE, totlen, NULL);
+ raw->next_in_ino = xd->node->next_in_ino;
+ xd->node->next_in_ino = raw;
+ } else {
+ xd->version = version;
+ xd->xprefix = rx->xprefix;
+ xd->name_len = rx->name_len;
+ xd->value_len = je16_to_cpu(rx->value_len);
+ xd->data_crc = je32_to_cpu(rx->data_crc);
+
+ jffs2_link_node_ref(c, jeb, ofs | REF_PRISTINE, totlen, (void *)xd);
+ }
+
+ if (jffs2_sum_active())
+ jffs2_sum_add_xattr_mem(s, rx, ofs - jeb->offset);
+ dbg_xattr("scaning xdatum at %#08x (xid=%u, version=%u)\n",
+ ofs, xd->xid, xd->version);
+ return 0;
+}
+
+static int jffs2_scan_xref_node(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
+ struct jffs2_raw_xref *rr, uint32_t ofs,
+ struct jffs2_summary *s)
+{
+ struct jffs2_xattr_ref *ref;
+ uint32_t crc;
+ int err;
+
+ crc = crc32(0, rr, sizeof(*rr) - 4);
+ if (crc != je32_to_cpu(rr->node_crc)) {
+ JFFS2_WARNING("node CRC failed at %#08x, read=%#08x, calc=%#08x\n",
+ ofs, je32_to_cpu(rr->node_crc), crc);
+ if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(rr->totlen)))))
+ return err;
+ return 0;
+ }
+
+ if (PAD(sizeof(struct jffs2_raw_xref)) != je32_to_cpu(rr->totlen)) {
+ JFFS2_WARNING("node length mismatch at %#08x, read=%u, calc=%zd\n",
+ ofs, je32_to_cpu(rr->totlen),
+ PAD(sizeof(struct jffs2_raw_xref)));
+ if ((err = jffs2_scan_dirty_space(c, jeb, je32_to_cpu(rr->totlen))))
+ return err;
+ return 0;
+ }
+
+ ref = jffs2_alloc_xattr_ref();
+ if (!ref)
+ return -ENOMEM;
+
+ /* BEFORE jffs2_build_xattr_subsystem() called,
+ * and AFTER xattr_ref is marked as a dead xref,
+ * ref->xid is used to store 32bit xid, xd is not used
+ * ref->ino is used to store 32bit inode-number, ic is not used
+ * Thoes variables are declared as union, thus using those
+ * are exclusive. In a similar way, ref->next is temporarily
+ * used to chain all xattr_ref object. It's re-chained to
+ * jffs2_inode_cache in jffs2_build_xattr_subsystem() correctly.
+ */
+ ref->ino = je32_to_cpu(rr->ino);
+ ref->xid = je32_to_cpu(rr->xid);
+ ref->xseqno = je32_to_cpu(rr->xseqno);
+ if (ref->xseqno > c->highest_xseqno)
+ c->highest_xseqno = (ref->xseqno & ~XREF_DELETE_MARKER);
+ ref->next = c->xref_temp;
+ c->xref_temp = ref;
+
+ jffs2_link_node_ref(c, jeb, ofs | REF_PRISTINE, PAD(je32_to_cpu(rr->totlen)), (void *)ref);
+
+ if (jffs2_sum_active())
+ jffs2_sum_add_xref_mem(s, rr, ofs - jeb->offset);
+ dbg_xattr("scan xref at %#08x (xid=%u, ino=%u)\n",
+ ofs, ref->xid, ref->ino);
+ return 0;
+}
+#endif
+
+/* Called with 'buf_size == 0' if buf is in fact a pointer _directly_ into
+ the flash, XIP-style */
static int jffs2_scan_eraseblock (struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
- unsigned char *buf, uint32_t buf_size, struct jffs2_summary *s) {
+ unsigned char *buf, uint32_t buf_size, struct jffs2_summary *s) {
struct jffs2_unknown_node *node;
struct jffs2_unknown_node crcnode;
- struct jffs2_sum_marker *sm;
uint32_t ofs, prevofs;
uint32_t hdr_crc, buf_ofs, buf_len;
int err;
#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
if (jffs2_cleanmarker_oob(c)) {
- int ret = jffs2_check_nand_cleanmarker(c, jeb);
+ int ret;
+
+ if (c->mtd->block_isbad(c->mtd, jeb->offset))
+ return BLK_STATE_BADBLOCK;
+
+ ret = jffs2_check_nand_cleanmarker(c, jeb);
D2(printk(KERN_NOTICE "jffs_check_nand_cleanmarker returned %d\n",ret));
+
/* Even if it's not found, we still scan to see
if the block is empty. We use this information
to decide whether to erase it or not. */
switch (ret) {
case 0: cleanmarkerfound = 1; break;
case 1: break;
- case 2: return BLK_STATE_BADBLOCK;
- case 3: return BLK_STATE_ALLDIRTY; /* Block has failed to erase min. once */
default: return ret;
}
}
#endif
if (jffs2_sum_active()) {
- sm = kmalloc(sizeof(struct jffs2_sum_marker), GFP_KERNEL);
- if (!sm) {
- return -ENOMEM;
- }
-
- err = jffs2_fill_scan_buf(c, (unsigned char *) sm, jeb->offset + c->sector_size -
- sizeof(struct jffs2_sum_marker), sizeof(struct jffs2_sum_marker));
- if (err) {
- kfree(sm);
- return err;
- }
-
- if (je32_to_cpu(sm->magic) == JFFS2_SUM_MAGIC ) {
- err = jffs2_sum_scan_sumnode(c, jeb, je32_to_cpu(sm->offset), &pseudo_random);
- if (err) {
- kfree(sm);
+ struct jffs2_sum_marker *sm;
+ void *sumptr = NULL;
+ uint32_t sumlen;
+
+ if (!buf_size) {
+ /* XIP case. Just look, point at the summary if it's there */
+ sm = (void *)buf + c->sector_size - sizeof(*sm);
+ if (je32_to_cpu(sm->magic) == JFFS2_SUM_MAGIC) {
+ sumptr = buf + je32_to_cpu(sm->offset);
+ sumlen = c->sector_size - je32_to_cpu(sm->offset);
+ }
+ } else {
+ /* If NAND flash, read a whole page of it. Else just the end */
+ if (c->wbuf_pagesize)
+ buf_len = c->wbuf_pagesize;
+ else
+ buf_len = sizeof(*sm);
+
+ /* Read as much as we want into the _end_ of the preallocated buffer */
+ err = jffs2_fill_scan_buf(c, buf + buf_size - buf_len,
+ jeb->offset + c->sector_size - buf_len,
+ buf_len);
+ if (err)
return err;
+
+ sm = (void *)buf + buf_size - sizeof(*sm);
+ if (je32_to_cpu(sm->magic) == JFFS2_SUM_MAGIC) {
+ sumlen = c->sector_size - je32_to_cpu(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 = kmalloc(sumlen, GFP_KERNEL);
+ if (!sumptr)
+ return -ENOMEM;
+ 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 */
+ err = jffs2_fill_scan_buf(c, sumptr,
+ jeb->offset + c->sector_size - sumlen,
+ sumlen - buf_len);
+ if (err)
+ return err;
+ }
}
+
}
- kfree(sm);
+ if (sumptr) {
+ err = jffs2_sum_scan_sumnode(c, jeb, sumptr, sumlen, &pseudo_random);
- ofs = jeb->offset;
- prevofs = jeb->offset - 1;
+ if (buf_size && sumlen > buf_size)
+ kfree(sumptr);
+ /* If it returns with a real error, bail.
+ If it returns positive, that's a block classification
+ (i.e. BLK_STATE_xxx) so return that too.
+ If it returns zero, fall through to full scan. */
+ if (err)
+ return err;
+ }
}
buf_ofs = jeb->offset;
if (!buf_size) {
+ /* This is the XIP case -- we're reading _directly_ from the flash chip */
buf_len = c->sector_size;
-
- if (jffs2_sum_active()) {
- /* must reread because of summary test */
- err = jffs2_fill_scan_buf(c, buf, buf_ofs, buf_len);
- if (err)
- return err;
- }
-
} else {
buf_len = EMPTY_SCAN_SIZE(c->sector_size);
err = jffs2_fill_scan_buf(c, buf, buf_ofs, buf_len);
if (err)
return err;
}
-
+
/* We temporarily use 'ofs' as a pointer into the buffer/jeb */
ofs = 0;
if (ofs) {
D1(printk(KERN_DEBUG "Free space at %08x ends at %08x\n", jeb->offset,
jeb->offset + ofs));
- DIRTY_SPACE(ofs);
+ if ((err = jffs2_prealloc_raw_node_refs(c, jeb, 1)))
+ return err;
+ if ((err = jffs2_scan_dirty_space(c, jeb, ofs)))
+ return err;
}
/* Now ofs is a complete physical flash offset as it always was... */
dbg_summary("no summary found in jeb 0x%08x. Apply original scan.\n",jeb->offset);
-scan_more:
+scan_more:
while(ofs < jeb->offset + c->sector_size) {
jffs2_dbg_acct_paranoia_check_nolock(c, jeb);
+ /* Make sure there are node refs available for use */
+ err = jffs2_prealloc_raw_node_refs(c, jeb, 2);
+ if (err)
+ return err;
+
cond_resched();
if (ofs & 3) {
}
if (ofs == prevofs) {
printk(KERN_WARNING "ofs 0x%08x has already been seen. Skipping\n", ofs);
- DIRTY_SPACE(4);
+ if ((err = jffs2_scan_dirty_space(c, jeb, 4)))
+ return err;
ofs += 4;
continue;
}
if (jeb->offset + c->sector_size < ofs + sizeof(*node)) {
D1(printk(KERN_DEBUG "Fewer than %zd bytes left to end of block. (%x+%x<%x+%zx) Not reading\n", sizeof(struct jffs2_unknown_node),
jeb->offset, c->sector_size, ofs, sizeof(*node)));
- DIRTY_SPACE((jeb->offset + c->sector_size)-ofs);
+ if ((err = jffs2_scan_dirty_space(c, jeb, (jeb->offset + c->sector_size)-ofs)))
+ return err;
break;
}
if (*(uint32_t *)(&buf[ofs-buf_ofs]) == 0xffffffff) {
uint32_t inbuf_ofs;
- uint32_t empty_start;
+ uint32_t empty_start, scan_end;
empty_start = ofs;
ofs += 4;
+ scan_end = min_t(uint32_t, EMPTY_SCAN_SIZE(c->sector_size)/8, buf_len);
D1(printk(KERN_DEBUG "Found empty flash at 0x%08x\n", ofs));
more_empty:
inbuf_ofs = ofs - buf_ofs;
- while (inbuf_ofs < buf_len) {
- if (*(uint32_t *)(&buf[inbuf_ofs]) != 0xffffffff) {
+ while (inbuf_ofs < scan_end) {
+ if (unlikely(*(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);
+ if ((err = jffs2_scan_dirty_space(c, jeb, ofs-empty_start)))
+ return err;
goto scan_more;
}
/* 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_phys) {
+ if (buf_ofs == jeb->offset && jeb->used_size == PAD(c->cleanmarker_size) &&
+ c->cleanmarker_size && !jeb->dirty_size && !ref_next(jeb->first_node)) {
D1(printk(KERN_DEBUG "%d bytes at start of block seems clean... assuming all clean\n", EMPTY_SCAN_SIZE(c->sector_size)));
return BLK_STATE_CLEANMARKER;
}
-
+ if (!buf_size && (scan_end != buf_len)) {/* XIP/point case */
+ scan_end = buf_len;
+ goto more_empty;
+ }
+
/* 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
+ /* 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;
}
+ /* point never reaches here */
+ scan_end = buf_len;
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)
if (ofs == jeb->offset && je16_to_cpu(node->magic) == KSAMTIB_CIGAM_2SFFJ) {
printk(KERN_WARNING "Magic bitmask is backwards at offset 0x%08x. Wrong endian filesystem?\n", ofs);
- DIRTY_SPACE(4);
+ if ((err = jffs2_scan_dirty_space(c, jeb, 4)))
+ return err;
ofs += 4;
continue;
}
if (je16_to_cpu(node->magic) == JFFS2_DIRTY_BITMASK) {
D1(printk(KERN_DEBUG "Dirty bitmask at 0x%08x\n", ofs));
- DIRTY_SPACE(4);
+ if ((err = jffs2_scan_dirty_space(c, jeb, 4)))
+ return err;
ofs += 4;
continue;
}
if (je16_to_cpu(node->magic) == JFFS2_OLD_MAGIC_BITMASK) {
printk(KERN_WARNING "Old JFFS2 bitmask found at 0x%08x\n", ofs);
printk(KERN_WARNING "You cannot use older JFFS2 filesystems with newer kernels\n");
- DIRTY_SPACE(4);
+ if ((err = jffs2_scan_dirty_space(c, jeb, 4)))
+ return err;
ofs += 4;
continue;
}
if (je16_to_cpu(node->magic) != JFFS2_MAGIC_BITMASK) {
/* OK. We're out of possibilities. Whinge and move on */
- noisy_printk(&noise, "jffs2_scan_eraseblock(): Magic bitmask 0x%04x not found at 0x%08x: 0x%04x instead\n",
- JFFS2_MAGIC_BITMASK, ofs,
+ noisy_printk(&noise, "jffs2_scan_eraseblock(): Magic bitmask 0x%04x not found at 0x%08x: 0x%04x instead\n",
+ JFFS2_MAGIC_BITMASK, ofs,
je16_to_cpu(node->magic));
- DIRTY_SPACE(4);
+ if ((err = jffs2_scan_dirty_space(c, jeb, 4)))
+ return err;
ofs += 4;
continue;
}
if (hdr_crc != je32_to_cpu(node->hdr_crc)) {
noisy_printk(&noise, "jffs2_scan_eraseblock(): Node at 0x%08x {0x%04x, 0x%04x, 0x%08x) has invalid CRC 0x%08x (calculated 0x%08x)\n",
ofs, je16_to_cpu(node->magic),
- je16_to_cpu(node->nodetype),
+ je16_to_cpu(node->nodetype),
je32_to_cpu(node->totlen),
je32_to_cpu(node->hdr_crc),
hdr_crc);
- DIRTY_SPACE(4);
+ if ((err = jffs2_scan_dirty_space(c, jeb, 4)))
+ return err;
ofs += 4;
continue;
}
- if (ofs + je32_to_cpu(node->totlen) >
- jeb->offset + c->sector_size) {
+ if (ofs + je32_to_cpu(node->totlen) > jeb->offset + c->sector_size) {
/* Eep. Node goes over the end of the erase block. */
printk(KERN_WARNING "Node at 0x%08x with length 0x%08x would run over the end of the erase block\n",
ofs, je32_to_cpu(node->totlen));
printk(KERN_WARNING "Perhaps the file system was created with the wrong erase size?\n");
- DIRTY_SPACE(4);
+ if ((err = jffs2_scan_dirty_space(c, jeb, 4)))
+ return err;
ofs += 4;
continue;
}
if (!(je16_to_cpu(node->nodetype) & JFFS2_NODE_ACCURATE)) {
/* Wheee. This is an obsoleted node */
D2(printk(KERN_DEBUG "Node at 0x%08x is obsolete. Skipping\n", ofs));
- DIRTY_SPACE(PAD(je32_to_cpu(node->totlen)));
+ if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(node->totlen)))))
+ return err;
ofs += PAD(je32_to_cpu(node->totlen));
continue;
}
if (err) return err;
ofs += PAD(je32_to_cpu(node->totlen));
break;
-
+
case JFFS2_NODETYPE_DIRENT:
if (buf_ofs + buf_len < ofs + je32_to_cpu(node->totlen)) {
buf_len = min_t(uint32_t, buf_size, jeb->offset + c->sector_size - ofs);
ofs += PAD(je32_to_cpu(node->totlen));
break;
+#ifdef CONFIG_JFFS2_FS_XATTR
+ case JFFS2_NODETYPE_XATTR:
+ if (buf_ofs + buf_len < ofs + je32_to_cpu(node->totlen)) {
+ buf_len = min_t(uint32_t, buf_size, jeb->offset + c->sector_size - ofs);
+ D1(printk(KERN_DEBUG "Fewer than %d bytes (xattr node)"
+ " left to end of buf. Reading 0x%x at 0x%08x\n",
+ je32_to_cpu(node->totlen), buf_len, ofs));
+ err = jffs2_fill_scan_buf(c, buf, ofs, buf_len);
+ if (err)
+ return err;
+ buf_ofs = ofs;
+ node = (void *)buf;
+ }
+ err = jffs2_scan_xattr_node(c, jeb, (void *)node, ofs, s);
+ if (err)
+ return err;
+ ofs += PAD(je32_to_cpu(node->totlen));
+ break;
+ case JFFS2_NODETYPE_XREF:
+ if (buf_ofs + buf_len < ofs + je32_to_cpu(node->totlen)) {
+ buf_len = min_t(uint32_t, buf_size, jeb->offset + c->sector_size - ofs);
+ D1(printk(KERN_DEBUG "Fewer than %d bytes (xref node)"
+ " left to end of buf. Reading 0x%x at 0x%08x\n",
+ je32_to_cpu(node->totlen), buf_len, ofs));
+ err = jffs2_fill_scan_buf(c, buf, ofs, buf_len);
+ if (err)
+ return err;
+ buf_ofs = ofs;
+ node = (void *)buf;
+ }
+ err = jffs2_scan_xref_node(c, jeb, (void *)node, ofs, s);
+ if (err)
+ return err;
+ ofs += PAD(je32_to_cpu(node->totlen));
+ break;
+#endif /* CONFIG_JFFS2_FS_XATTR */
+
case JFFS2_NODETYPE_CLEANMARKER:
D1(printk(KERN_DEBUG "CLEANMARKER node found at 0x%08x\n", ofs));
if (je32_to_cpu(node->totlen) != c->cleanmarker_size) {
- printk(KERN_NOTICE "CLEANMARKER node found at 0x%08x has totlen 0x%x != normal 0x%x\n",
+ printk(KERN_NOTICE "CLEANMARKER node found at 0x%08x has totlen 0x%x != normal 0x%x\n",
ofs, je32_to_cpu(node->totlen), c->cleanmarker_size);
- DIRTY_SPACE(PAD(sizeof(struct jffs2_unknown_node)));
+ if ((err = jffs2_scan_dirty_space(c, jeb, PAD(sizeof(struct jffs2_unknown_node)))))
+ return err;
ofs += PAD(sizeof(struct jffs2_unknown_node));
} else if (jeb->first_node) {
printk(KERN_NOTICE "CLEANMARKER node found at 0x%08x, not first node in block (0x%08x)\n", ofs, jeb->offset);
- DIRTY_SPACE(PAD(sizeof(struct jffs2_unknown_node)));
+ if ((err = jffs2_scan_dirty_space(c, jeb, PAD(sizeof(struct jffs2_unknown_node)))))
+ return err;
ofs += PAD(sizeof(struct jffs2_unknown_node));
} else {
- struct jffs2_raw_node_ref *marker_ref = jffs2_alloc_raw_node_ref();
- if (!marker_ref) {
- printk(KERN_NOTICE "Failed to allocate node ref for clean marker\n");
- return -ENOMEM;
- }
- marker_ref->next_in_ino = NULL;
- marker_ref->next_phys = NULL;
- marker_ref->flash_offset = ofs | REF_NORMAL;
- marker_ref->__totlen = c->cleanmarker_size;
- jeb->first_node = jeb->last_node = marker_ref;
-
- USED_SPACE(PAD(c->cleanmarker_size));
+ jffs2_link_node_ref(c, jeb, ofs | REF_NORMAL, c->cleanmarker_size, NULL);
+
ofs += PAD(c->cleanmarker_size);
}
break;
case JFFS2_NODETYPE_PADDING:
if (jffs2_sum_active())
jffs2_sum_add_padding_mem(s, je32_to_cpu(node->totlen));
- DIRTY_SPACE(PAD(je32_to_cpu(node->totlen)));
+ if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(node->totlen)))))
+ return err;
ofs += PAD(je32_to_cpu(node->totlen));
break;
switch (je16_to_cpu(node->nodetype) & JFFS2_COMPAT_MASK) {
case JFFS2_FEATURE_ROCOMPAT:
printk(KERN_NOTICE "Read-only compatible feature node (0x%04x) found at offset 0x%08x\n", je16_to_cpu(node->nodetype), ofs);
- c->flags |= JFFS2_SB_FLAG_RO;
+ c->flags |= JFFS2_SB_FLAG_RO;
if (!(jffs2_is_readonly(c)))
return -EROFS;
- DIRTY_SPACE(PAD(je32_to_cpu(node->totlen)));
+ if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(node->totlen)))))
+ return err;
ofs += PAD(je32_to_cpu(node->totlen));
break;
case JFFS2_FEATURE_RWCOMPAT_DELETE:
D1(printk(KERN_NOTICE "Unknown but compatible feature node (0x%04x) found at offset 0x%08x\n", je16_to_cpu(node->nodetype), ofs));
- DIRTY_SPACE(PAD(je32_to_cpu(node->totlen)));
+ if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(node->totlen)))))
+ return err;
ofs += PAD(je32_to_cpu(node->totlen));
break;
- case JFFS2_FEATURE_RWCOMPAT_COPY:
+ case JFFS2_FEATURE_RWCOMPAT_COPY: {
D1(printk(KERN_NOTICE "Unknown but compatible feature node (0x%04x) found at offset 0x%08x\n", je16_to_cpu(node->nodetype), ofs));
- USED_SPACE(PAD(je32_to_cpu(node->totlen)));
+
+ jffs2_link_node_ref(c, jeb, ofs | REF_PRISTINE, PAD(je32_to_cpu(node->totlen)), NULL);
+
+ /* We can't summarise nodes we don't grok */
+ jffs2_sum_disable_collecting(s);
ofs += PAD(je32_to_cpu(node->totlen));
break;
+ }
}
}
}
}
}
- D1(printk(KERN_DEBUG "Block at 0x%08x: free 0x%08x, dirty 0x%08x, unchecked 0x%08x, used 0x%08x\n", jeb->offset,
- jeb->free_size, jeb->dirty_size, jeb->unchecked_size, jeb->used_size));
-
+ D1(printk(KERN_DEBUG "Block at 0x%08x: free 0x%08x, dirty 0x%08x, unchecked 0x%08x, used 0x%08x, wasted 0x%08x\n",
+ jeb->offset,jeb->free_size, jeb->dirty_size, jeb->unchecked_size, jeb->used_size, jeb->wasted_size));
+
/* mark_node_obsolete can add to wasted !! */
if (jeb->wasted_size) {
jeb->dirty_size += jeb->wasted_size;
ic->nodes = (void *)ic;
jffs2_add_ino_cache(c, ic);
if (ino == 1)
- ic->nlink = 1;
+ ic->pino_nlink = 1;
return ic;
}
-static int jffs2_scan_inode_node(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
+static int jffs2_scan_inode_node(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
struct jffs2_raw_inode *ri, uint32_t ofs, struct jffs2_summary *s)
{
- struct jffs2_raw_node_ref *raw;
struct jffs2_inode_cache *ic;
- uint32_t ino = je32_to_cpu(ri->ino);
+ uint32_t crc, ino = je32_to_cpu(ri->ino);
D1(printk(KERN_DEBUG "jffs2_scan_inode_node(): Node at 0x%08x\n", ofs));
/* We do very little here now. Just check the ino# to which we should attribute
- this node; we can do all the CRC checking etc. later. There's a tradeoff here --
+ this node; we can do all the CRC checking etc. later. There's a tradeoff here --
we used to scan the flash once only, reading everything we want from it into
memory, then building all our in-core data structures and freeing the extra
information. Now we allow the first part of the mount to complete a lot quicker,
- but we have to go _back_ to the flash in order to finish the CRC checking, etc.
+ but we have to go _back_ to the flash in order to finish the CRC checking, etc.
Which means that the _full_ amount of time to get to proper write mode with GC
operational may actually be _longer_ than before. Sucks to be me. */
- raw = jffs2_alloc_raw_node_ref();
- if (!raw) {
- printk(KERN_NOTICE "jffs2_scan_inode_node(): allocation of node reference failed\n");
- return -ENOMEM;
+ /* Check the node CRC in any case. */
+ crc = crc32(0, ri, sizeof(*ri)-8);
+ if (crc != je32_to_cpu(ri->node_crc)) {
+ printk(KERN_NOTICE "jffs2_scan_inode_node(): CRC failed on "
+ "node at 0x%08x: Read 0x%08x, calculated 0x%08x\n",
+ ofs, je32_to_cpu(ri->node_crc), crc);
+ /*
+ * We believe totlen because the CRC on the node
+ * _header_ was OK, just the node itself failed.
+ */
+ return jffs2_scan_dirty_space(c, jeb,
+ PAD(je32_to_cpu(ri->totlen)));
}
ic = jffs2_get_ino_cache(c, ino);
if (!ic) {
- /* Inocache get failed. Either we read a bogus ino# or it's just genuinely the
- first node we found for this inode. Do a CRC check to protect against the former
- case */
- uint32_t crc = crc32(0, ri, sizeof(*ri)-8);
-
- if (crc != je32_to_cpu(ri->node_crc)) {
- printk(KERN_NOTICE "jffs2_scan_inode_node(): CRC failed on node at 0x%08x: Read 0x%08x, calculated 0x%08x\n",
- ofs, je32_to_cpu(ri->node_crc), crc);
- /* We believe totlen because the CRC on the node _header_ was OK, just the node itself failed. */
- DIRTY_SPACE(PAD(je32_to_cpu(ri->totlen)));
- jffs2_free_raw_node_ref(raw);
- return 0;
- }
ic = jffs2_scan_make_ino_cache(c, ino);
- if (!ic) {
- jffs2_free_raw_node_ref(raw);
+ if (!ic)
return -ENOMEM;
- }
}
/* Wheee. It worked */
+ jffs2_link_node_ref(c, jeb, ofs | REF_UNCHECKED, PAD(je32_to_cpu(ri->totlen)), ic);
- raw->flash_offset = ofs | REF_UNCHECKED;
- raw->__totlen = PAD(je32_to_cpu(ri->totlen));
- raw->next_phys = NULL;
- raw->next_in_ino = ic->nodes;
-
- ic->nodes = raw;
- if (!jeb->first_node)
- jeb->first_node = raw;
- if (jeb->last_node)
- jeb->last_node->next_phys = raw;
- jeb->last_node = raw;
-
- D1(printk(KERN_DEBUG "Node is ino #%u, version %d. Range 0x%x-0x%x\n",
+ D1(printk(KERN_DEBUG "Node is ino #%u, version %d. Range 0x%x-0x%x\n",
je32_to_cpu(ri->ino), je32_to_cpu(ri->version),
je32_to_cpu(ri->offset),
je32_to_cpu(ri->offset)+je32_to_cpu(ri->dsize)));
pseudo_random += je32_to_cpu(ri->version);
- UNCHECKED_SPACE(PAD(je32_to_cpu(ri->totlen)));
-
if (jffs2_sum_active()) {
jffs2_sum_add_inode_mem(s, ri, ofs - jeb->offset);
}
return 0;
}
-static int jffs2_scan_dirent_node(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
+static int jffs2_scan_dirent_node(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
struct jffs2_raw_dirent *rd, uint32_t ofs, struct jffs2_summary *s)
{
- struct jffs2_raw_node_ref *raw;
struct jffs2_full_dirent *fd;
struct jffs2_inode_cache *ic;
+ uint32_t checkedlen;
uint32_t crc;
+ int err;
D1(printk(KERN_DEBUG "jffs2_scan_dirent_node(): Node at 0x%08x\n", ofs));
printk(KERN_NOTICE "jffs2_scan_dirent_node(): Node CRC failed on node at 0x%08x: Read 0x%08x, calculated 0x%08x\n",
ofs, je32_to_cpu(rd->node_crc), crc);
/* We believe totlen because the CRC on the node _header_ was OK, just the node itself failed. */
- DIRTY_SPACE(PAD(je32_to_cpu(rd->totlen)));
+ if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(rd->totlen)))))
+ return err;
return 0;
}
pseudo_random += je32_to_cpu(rd->version);
- fd = jffs2_alloc_full_dirent(rd->nsize+1);
+ /* Should never happen. Did. (OLPC trac #4184)*/
+ checkedlen = strnlen(rd->name, rd->nsize);
+ if (checkedlen < rd->nsize) {
+ printk(KERN_ERR "Dirent at %08x has zeroes in name. Truncating to %d chars\n",
+ ofs, checkedlen);
+ }
+ fd = jffs2_alloc_full_dirent(checkedlen+1);
if (!fd) {
return -ENOMEM;
}
- memcpy(&fd->name, rd->name, rd->nsize);
- fd->name[rd->nsize] = 0;
+ memcpy(&fd->name, rd->name, checkedlen);
+ fd->name[checkedlen] = 0;
crc = crc32(0, fd->name, rd->nsize);
if (crc != je32_to_cpu(rd->name_crc)) {
printk(KERN_NOTICE "jffs2_scan_dirent_node(): Name CRC failed on node at 0x%08x: Read 0x%08x, calculated 0x%08x\n",
- ofs, je32_to_cpu(rd->name_crc), crc);
+ ofs, je32_to_cpu(rd->name_crc), crc);
D1(printk(KERN_NOTICE "Name for which CRC failed is (now) '%s', ino #%d\n", fd->name, je32_to_cpu(rd->ino)));
jffs2_free_full_dirent(fd);
/* FIXME: Why do we believe totlen? */
/* We believe totlen because the CRC on the node _header_ was OK, just the name failed. */
- DIRTY_SPACE(PAD(je32_to_cpu(rd->totlen)));
+ if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(rd->totlen)))))
+ return err;
return 0;
}
- raw = jffs2_alloc_raw_node_ref();
- if (!raw) {
- jffs2_free_full_dirent(fd);
- printk(KERN_NOTICE "jffs2_scan_dirent_node(): allocation of node reference failed\n");
- return -ENOMEM;
- }
ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(rd->pino));
if (!ic) {
jffs2_free_full_dirent(fd);
- jffs2_free_raw_node_ref(raw);
return -ENOMEM;
}
-
- raw->__totlen = PAD(je32_to_cpu(rd->totlen));
- raw->flash_offset = ofs | REF_PRISTINE;
- raw->next_phys = NULL;
- raw->next_in_ino = ic->nodes;
- ic->nodes = raw;
- if (!jeb->first_node)
- jeb->first_node = raw;
- if (jeb->last_node)
- jeb->last_node->next_phys = raw;
- jeb->last_node = raw;
-
- fd->raw = raw;
+
+ fd->raw = jffs2_link_node_ref(c, jeb, ofs | dirent_node_state(rd),
+ PAD(je32_to_cpu(rd->totlen)), ic);
+
fd->next = NULL;
fd->version = je32_to_cpu(rd->version);
fd->ino = je32_to_cpu(rd->ino);
- fd->nhash = full_name_hash(fd->name, rd->nsize);
+ fd->nhash = full_name_hash(fd->name, checkedlen);
fd->type = rd->type;
- USED_SPACE(PAD(je32_to_cpu(rd->totlen)));
jffs2_add_fd_to_list(c, fd, &ic->scan_dents);
if (jffs2_sum_active()) {
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff