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[JFFS2] Split a large routine on several smaller.

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Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Artem B. Bityutskiy 2005-07-15 11:13:57 +01:00 committed by Thomas Gleixner
parent 2fc2991175
commit dae6227f71
1 changed files with 336 additions and 261 deletions
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597
fs/jffs2/nodelist.c
View file

@ -7,7 +7,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
* $Id: nodelist.c,v 1.98 2005/07/10 15:15:32 dedekind Exp $
* $Id: nodelist.c,v 1.99 2005/07/15 10:13:54 dedekind Exp $
*
*/
@ -137,6 +137,307 @@ static struct jffs2_raw_node_ref *jffs2_first_valid_node(struct jffs2_raw_node_r
return NULL;
}
/*
* Helper function for jffs2_get_inode_nodes().
* It is called every time an directory entry node is found.
*
* Returns: 0 on succes;
* 1 if the node should be marked obsolete;
* negative error code on failure.
*/
static inline int
read_direntry(struct jffs2_sb_info *c,
struct jffs2_raw_node_ref *ref,
struct jffs2_raw_dirent *rd,
uint32_t read,
struct jffs2_full_dirent **fdp,
int32_t *latest_mctime,
uint32_t *mctime_ver)
{
struct jffs2_full_dirent *fd;
/* The direntry nodes are checked during the flash scanning */
BUG_ON(ref_flags(ref) == REF_UNCHECKED);
/* Obsoleted. This cannot happen, surely? dwmw2 20020308 */
BUG_ON(ref_obsolete(ref));
/* Sanity check */
if (unlikely(PAD((rd->nsize + sizeof(*rd))) != PAD(je32_to_cpu(rd->totlen)))) {
printk(KERN_ERR "Error! Illegal nsize in node at %#08x: nsize %#02x, totlen %#04x\n",
ref_offset(ref), rd->nsize, je32_to_cpu(rd->totlen));
return 1;
}
fd = jffs2_alloc_full_dirent(rd->nsize + 1);
if (unlikely(!fd))
return -ENOMEM;
fd->raw = ref;
fd->version = je32_to_cpu(rd->version);
fd->ino = je32_to_cpu(rd->ino);
fd->type = rd->type;
/* Pick out the mctime of the latest dirent */
if(fd->version > *mctime_ver) {
*mctime_ver = fd->version;
*latest_mctime = je32_to_cpu(rd->mctime);
}
/*
* Copy as much of the name as possible from the raw
* dirent we've already read from the flash.
*/
if (read > sizeof(*rd))
memcpy(&fd->name[0], &rd->name[0],
min_t(uint32_t, rd->nsize, (read - sizeof(*rd)) ));
/* Do we need to copy any more of the name directly from the flash? */
if (rd->nsize + sizeof(*rd) > read) {
/* FIXME: point() */
int err;
int already = read - sizeof(*rd);
err = jffs2_flash_read(c, (ref_offset(ref)) + read,
rd->nsize - already, &read, &fd->name[already]);
if (unlikely(read != rd->nsize - already) && likely(!err))
return -EIO;
if (unlikely(err)) {
printk(KERN_WARNING "Read remainder of name in jffs2_get_inode_nodes(): error %d\n", err);
jffs2_free_full_dirent(fd);
return -EIO;
}
}
fd->nhash = full_name_hash(fd->name, rd->nsize);
fd->next = NULL;
fd->name[rd->nsize] = '\0';
/*
* Wheee. We now have a complete jffs2_full_dirent structure, with
* the name in it and everything. Link it into the list
*/
D1(printk(KERN_DEBUG "Adding fd \"%s\", ino #%u\n", fd->name, fd->ino));
jffs2_add_fd_to_list(c, fd, fdp);
return 0;
}
/*
* Helper function for jffs2_get_inode_nodes().
* It is called every time an inode node is found.
*
* Returns: 0 on succes;
* 1 if the node should be marked obsolete;
* negative error code on failure.
*/
static inline int
read_dnode(struct jffs2_sb_info *c,
struct jffs2_raw_node_ref *ref,
struct jffs2_raw_inode *rd,
uint32_t read,
struct rb_root *tnp,
int32_t *latest_mctime,
uint32_t *mctime_ver)
{
struct jffs2_eraseblock *jeb;
struct jffs2_tmp_dnode_info *tn;
/* Obsoleted. This cannot happen, surely? dwmw2 20020308 */
BUG_ON(ref_obsolete(ref));
/* If we've never checked the CRCs on this node, check them now */
if (ref_flags(ref) == REF_UNCHECKED) {
uint32_t crc, len;
crc = crc32(0, rd, sizeof(*rd) - 8);
if (unlikely(crc != je32_to_cpu(rd->node_crc))) {
printk(KERN_WARNING "Header CRC failed on node at %#08x: read %#08x, calculated %#08x\n",
ref_offset(ref), je32_to_cpu(rd->node_crc), crc);
return 1;
}
/* Sanity checks */
if (unlikely(je32_to_cpu(rd->offset) > je32_to_cpu(rd->isize)) ||
unlikely(PAD(je32_to_cpu(rd->csize) + sizeof(*rd)) != PAD(je32_to_cpu(rd->totlen)))) {
printk(KERN_WARNING "Inode corrupted at %#08x, totlen %d, #ino %d, version %d, "
"isize %d, csize %d, dsize %d \n",
ref_offset(ref), je32_to_cpu(rd->totlen), je32_to_cpu(rd->ino),
je32_to_cpu(rd->version), je32_to_cpu(rd->isize),
je32_to_cpu(rd->csize), je32_to_cpu(rd->dsize));
return 1;
}
if (rd->compr != JFFS2_COMPR_ZERO && je32_to_cpu(rd->csize)) {
unsigned char *buf = NULL;
uint32_t pointed = 0;
int err;
#ifndef __ECOS
if (c->mtd->point) {
err = c->mtd->point (c->mtd, ref_offset(ref) + sizeof(*rd), je32_to_cpu(rd->csize),
&read, &buf);
if (unlikely(read < je32_to_cpu(rd->csize)) && likely(!err)) {
D1(printk(KERN_DEBUG "MTD point returned len too short: 0x%zx\n", read));
c->mtd->unpoint(c->mtd, buf, ref_offset(ref) + sizeof(*rd),
je32_to_cpu(rd->csize));
} else if (unlikely(err)){
D1(printk(KERN_DEBUG "MTD point failed %d\n", err));
} else
pointed = 1; /* succefully pointed to device */
}
#endif
if(!pointed){
buf = kmalloc(je32_to_cpu(rd->csize), GFP_KERNEL);
if (!buf)
return -ENOMEM;
err = jffs2_flash_read(c, ref_offset(ref) + sizeof(*rd), je32_to_cpu(rd->csize),
&read, buf);
if (unlikely(read != je32_to_cpu(rd->csize)) && likely(!err))
err = -EIO;
if (err) {
kfree(buf);
return err;
}
}
crc = crc32(0, buf, je32_to_cpu(rd->csize));
if(!pointed)
kfree(buf);
#ifndef __ECOS
else
c->mtd->unpoint(c->mtd, buf, ref_offset(ref) + sizeof(*rd), je32_to_cpu(rd->csize));
#endif
if (crc != je32_to_cpu(rd->data_crc)) {
printk(KERN_NOTICE "Data CRC failed on node at %#08x: read %#08x, calculated %#08x\n",
ref_offset(ref), je32_to_cpu(rd->data_crc), crc);
return 1;
}
}
/* Mark the node as having been checked and fix the accounting accordingly */
jeb = &c->blocks[ref->flash_offset / c->sector_size];
len = ref_totlen(c, jeb, ref);
spin_lock(&c->erase_completion_lock);
jeb->used_size += len;
jeb->unchecked_size -= len;
c->used_size += len;
c->unchecked_size -= len;
/* If node covers at least a whole page, or if it starts at the
beginning of a page and runs to the end of the file, or if
it's a hole node, mark it REF_PRISTINE, else REF_NORMAL.
If it's actually overlapped, it'll get made NORMAL (or OBSOLETE)
when the overlapping node(s) get added to the tree anyway.
*/
if ((je32_to_cpu(rd->dsize) >= PAGE_CACHE_SIZE) ||
( ((je32_to_cpu(rd->offset) & (PAGE_CACHE_SIZE-1))==0) &&
(je32_to_cpu(rd->dsize) + je32_to_cpu(rd->offset) == je32_to_cpu(rd->isize)))) {
D1(printk(KERN_DEBUG "Marking node at %#08x REF_PRISTINE\n", ref_offset(ref)));
ref->flash_offset = ref_offset(ref) | REF_PRISTINE;
} else {
D1(printk(KERN_DEBUG "Marking node at %#08x REF_NORMAL\n", ref_offset(ref)));
ref->flash_offset = ref_offset(ref) | REF_NORMAL;
}
spin_unlock(&c->erase_completion_lock);
}
tn = jffs2_alloc_tmp_dnode_info();
if (!tn) {
D1(printk(KERN_DEBUG "alloc tn failed\n"));
return -ENOMEM;
}
tn->fn = jffs2_alloc_full_dnode();
if (!tn->fn) {
D1(printk(KERN_DEBUG "alloc fn failed\n"));
jffs2_free_tmp_dnode_info(tn);
return -ENOMEM;
}
tn->version = je32_to_cpu(rd->version);
tn->fn->ofs = je32_to_cpu(rd->offset);
tn->fn->raw = ref;
/* There was a bug where we wrote hole nodes out with
csize/dsize swapped. Deal with it */
if (rd->compr == JFFS2_COMPR_ZERO && !je32_to_cpu(rd->dsize) && je32_to_cpu(rd->csize))
tn->fn->size = je32_to_cpu(rd->csize);
else // normal case...
tn->fn->size = je32_to_cpu(rd->dsize);
D1(printk(KERN_DEBUG "dnode @%08x: ver %u, offset %#04x, dsize %#04x\n",
ref_offset(ref), je32_to_cpu(rd->version),
je32_to_cpu(rd->offset), je32_to_cpu(rd->dsize)));
jffs2_add_tn_to_tree(tn, tnp);
return 0;
}
/*
* Helper function for jffs2_get_inode_nodes().
* It is called every time an unknown node is found.
*
* Returns: 0 on succes;
* 1 if the node should be marked obsolete;
* negative error code on failure.
*/
static inline int
read_unknown(struct jffs2_sb_info *c,
struct jffs2_raw_node_ref *ref,
struct jffs2_unknown_node *un,
uint32_t read)
{
/* We don't mark unknown nodes as REF_UNCHECKED */
BUG_ON(ref_flags(ref) == REF_UNCHECKED);
un->nodetype = cpu_to_je16(JFFS2_NODE_ACCURATE | je16_to_cpu(un->nodetype));
if (crc32(0, un, sizeof(struct jffs2_unknown_node) - 4) != je32_to_cpu(un->hdr_crc)) {
/* Hmmm. This should have been caught at scan time. */
printk(KERN_WARNING "Warning! Node header CRC failed at %#08x. "
"But it must have been OK earlier.\n", ref_offset(ref));
D1(printk(KERN_DEBUG "Node was: { %#04x, %#04x, %#08x, %#08x }\n",
je16_to_cpu(un->magic), je16_to_cpu(un->nodetype),
je32_to_cpu(un->totlen), je32_to_cpu(un->hdr_crc)));
return 1;
} else {
switch(je16_to_cpu(un->nodetype) & JFFS2_COMPAT_MASK) {
case JFFS2_FEATURE_INCOMPAT:
printk(KERN_NOTICE "Unknown INCOMPAT nodetype %#04X at %#08x\n",
je16_to_cpu(un->nodetype), ref_offset(ref));
/* EEP */
BUG();
break;
case JFFS2_FEATURE_ROCOMPAT:
printk(KERN_NOTICE "Unknown ROCOMPAT nodetype %#04X at %#08x\n",
je16_to_cpu(un->nodetype), ref_offset(ref));
BUG_ON(!(c->flags & JFFS2_SB_FLAG_RO));
break;
case JFFS2_FEATURE_RWCOMPAT_COPY:
printk(KERN_NOTICE "Unknown RWCOMPAT_COPY nodetype %#04X at %#08x\n",
je16_to_cpu(un->nodetype), ref_offset(ref));
break;
case JFFS2_FEATURE_RWCOMPAT_DELETE:
printk(KERN_NOTICE "Unknown RWCOMPAT_DELETE nodetype %#04X at %#08x\n",
je16_to_cpu(un->nodetype), ref_offset(ref));
return 1;
}
}
return 0;
}
/* Get tmp_dnode_info and full_dirent for all non-obsolete nodes associated
with this ino, returning the former in order of version */
@ -146,9 +447,8 @@ int jffs2_get_inode_nodes(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
uint32_t *mctime_ver)
{
struct jffs2_raw_node_ref *ref, *valid_ref;
struct jffs2_tmp_dnode_info *tn;
struct rb_root ret_tn = RB_ROOT;
struct jffs2_full_dirent *fd, *ret_fd = NULL;
struct jffs2_full_dirent *ret_fd = NULL;
union jffs2_node_union node;
size_t retlen;
int err;
@ -186,292 +486,67 @@ int jffs2_get_inode_nodes(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
goto free_out;
}
/* Check we've managed to read at least the common node header */
if (retlen < min_t(uint32_t, ref_totlen(c, NULL, ref), sizeof(node.u))) {
printk(KERN_WARNING "short read in get_inode_nodes()\n");
err = -EIO;
goto free_out;
}
switch (je16_to_cpu(node.u.nodetype)) {
case JFFS2_NODETYPE_DIRENT:
D1(printk(KERN_DEBUG "Node at %08x (%d) is a dirent node\n", ref_offset(ref), ref_flags(ref)));
if (ref_flags(ref) == REF_UNCHECKED) {
printk(KERN_WARNING "BUG: Dirent node at 0x%08x never got checked? How?\n", ref_offset(ref));
BUG();
}
if (retlen < sizeof(node.d)) {
printk(KERN_WARNING "short read in get_inode_nodes()\n");
printk(KERN_WARNING "Warning! Short read dirent at %#08x\n", ref_offset(ref));
err = -EIO;
goto free_out;
}
/* sanity check */
if (PAD((node.d.nsize + sizeof (node.d))) != PAD(je32_to_cpu (node.d.totlen))) {
printk(KERN_NOTICE "jffs2_get_inode_nodes(): Illegal nsize in node at 0x%08x: nsize 0x%02x, totlen %04x\n",
ref_offset(ref), node.d.nsize, je32_to_cpu(node.d.totlen));
err = read_direntry(c, ref, &node.d, retlen, &ret_fd, latest_mctime, mctime_ver);
if (err == 1) {
jffs2_mark_node_obsolete(c, ref);
spin_lock(&c->erase_completion_lock);
continue;
}
break;
} else if (unlikely(err))
goto free_out;
if (je32_to_cpu(node.d.version) > *highest_version)
*highest_version = je32_to_cpu(node.d.version);
if (ref_obsolete(ref)) {
/* Obsoleted. This cannot happen, surely? dwmw2 20020308 */
printk(KERN_ERR "Dirent node at 0x%08x became obsolete while we weren't looking\n",
ref_offset(ref));
BUG();
}
fd = jffs2_alloc_full_dirent(node.d.nsize+1);
if (!fd) {
err = -ENOMEM;
goto free_out;
}
fd->raw = ref;
fd->version = je32_to_cpu(node.d.version);
fd->ino = je32_to_cpu(node.d.ino);
fd->type = node.d.type;
/* Pick out the mctime of the latest dirent */
if(fd->version > *mctime_ver) {
*mctime_ver = fd->version;
*latest_mctime = je32_to_cpu(node.d.mctime);
}
/* memcpy as much of the name as possible from the raw
dirent we've already read from the flash
*/
if (retlen > sizeof(struct jffs2_raw_dirent))
memcpy(&fd->name[0], &node.d.name[0], min_t(uint32_t, node.d.nsize, (retlen-sizeof(struct jffs2_raw_dirent))));
/* Do we need to copy any more of the name directly
from the flash?
*/
if (node.d.nsize + sizeof(struct jffs2_raw_dirent) > retlen) {
/* FIXME: point() */
int already = retlen - sizeof(struct jffs2_raw_dirent);
err = jffs2_flash_read(c, (ref_offset(ref)) + retlen,
node.d.nsize - already, &retlen, &fd->name[already]);
if (!err && retlen != node.d.nsize - already)
err = -EIO;
if (err) {
printk(KERN_WARNING "Read remainder of name in jffs2_get_inode_nodes(): error %d\n", err);
jffs2_free_full_dirent(fd);
goto free_out;
}
}
fd->nhash = full_name_hash(fd->name, node.d.nsize);
fd->next = NULL;
fd->name[node.d.nsize] = '\0';
/* Wheee. We now have a complete jffs2_full_dirent structure, with
the name in it and everything. Link it into the list
*/
D1(printk(KERN_DEBUG "Adding fd \"%s\", ino #%u\n", fd->name, fd->ino));
jffs2_add_fd_to_list(c, fd, &ret_fd);
break;
case JFFS2_NODETYPE_INODE:
D1(printk(KERN_DEBUG "Node at %08x (%d) is a data node\n", ref_offset(ref), ref_flags(ref)));
if (retlen < sizeof(node.i)) {
printk(KERN_WARNING "read too short for dnode\n");
printk(KERN_WARNING "Warning! Short read dnode at %#08x\n", ref_offset(ref));
err = -EIO;
goto free_out;
}
err = read_dnode(c, ref, &node.i, retlen, &ret_tn, latest_mctime, mctime_ver);
if (err == 1) {
jffs2_mark_node_obsolete(c, ref);
break;
} else if (unlikely(err))
goto free_out;
if (je32_to_cpu(node.i.version) > *highest_version)
*highest_version = je32_to_cpu(node.i.version);
D1(printk(KERN_DEBUG "version %d, highest_version now %d\n", je32_to_cpu(node.i.version), *highest_version));
D1(printk(KERN_DEBUG "version %d, highest_version now %d\n",
je32_to_cpu(node.i.version), *highest_version));
if (ref_obsolete(ref)) {
/* Obsoleted. This cannot happen, surely? dwmw2 20020308 */
printk(KERN_ERR "Inode node at 0x%08x became obsolete while we weren't looking\n",
ref_offset(ref));
BUG();
}
/* If we've never checked the CRCs on this node, check them now. */
if (ref_flags(ref) == REF_UNCHECKED) {
uint32_t crc, len;
struct jffs2_eraseblock *jeb;
crc = crc32(0, &node, sizeof(node.i)-8);
if (crc != je32_to_cpu(node.i.node_crc)) {
printk(KERN_NOTICE "jffs2_get_inode_nodes(): CRC failed on node at 0x%08x: Read 0x%08x, calculated 0x%08x\n",
ref_offset(ref), je32_to_cpu(node.i.node_crc), crc);
jffs2_mark_node_obsolete(c, ref);
spin_lock(&c->erase_completion_lock);
continue;
}
/* sanity checks */
if ( je32_to_cpu(node.i.offset) > je32_to_cpu(node.i.isize) ||
PAD(je32_to_cpu(node.i.csize) + sizeof (node.i)) != PAD(je32_to_cpu(node.i.totlen))) {
printk(KERN_NOTICE "jffs2_get_inode_nodes(): Inode corrupted at 0x%08x, totlen %d, #ino %d, version %d, isize %d, csize %d, dsize %d \n",
ref_offset(ref), je32_to_cpu(node.i.totlen), je32_to_cpu(node.i.ino),
je32_to_cpu(node.i.version), je32_to_cpu(node.i.isize),
je32_to_cpu(node.i.csize), je32_to_cpu(node.i.dsize));
jffs2_mark_node_obsolete(c, ref);
spin_lock(&c->erase_completion_lock);
continue;
}
if (node.i.compr != JFFS2_COMPR_ZERO && je32_to_cpu(node.i.csize)) {
unsigned char *buf=NULL;
uint32_t pointed = 0;
#ifndef __ECOS
if (c->mtd->point) {
err = c->mtd->point (c->mtd, ref_offset(ref) + sizeof(node.i), je32_to_cpu(node.i.csize),
&retlen, &buf);
if (!err && retlen < je32_to_cpu(node.i.csize)) {
D1(printk(KERN_DEBUG "MTD point returned len too short: 0x%zx\n", retlen));
c->mtd->unpoint(c->mtd, buf, ref_offset(ref) + sizeof(node.i), je32_to_cpu(node.i.csize));
} else if (err){
D1(printk(KERN_DEBUG "MTD point failed %d\n", err));
} else
pointed = 1; /* succefully pointed to device */
}
#endif
if(!pointed){
buf = kmalloc(je32_to_cpu(node.i.csize), GFP_KERNEL);
if (!buf)
return -ENOMEM;
err = jffs2_flash_read(c, ref_offset(ref) + sizeof(node.i), je32_to_cpu(node.i.csize),
&retlen, buf);
if (!err && retlen != je32_to_cpu(node.i.csize))
err = -EIO;
if (err) {
kfree(buf);
return err;
}
}
crc = crc32(0, buf, je32_to_cpu(node.i.csize));
if(!pointed)
kfree(buf);
#ifndef __ECOS
else
c->mtd->unpoint(c->mtd, buf, ref_offset(ref) + sizeof(node.i), je32_to_cpu(node.i.csize));
#endif
if (crc != je32_to_cpu(node.i.data_crc)) {
printk(KERN_NOTICE "jffs2_get_inode_nodes(): Data CRC failed on node at 0x%08x: Read 0x%08x, calculated 0x%08x\n",
ref_offset(ref), je32_to_cpu(node.i.data_crc), crc);
jffs2_mark_node_obsolete(c, ref);
spin_lock(&c->erase_completion_lock);
continue;
}
}
/* Mark the node as having been checked and fix the accounting accordingly */
spin_lock(&c->erase_completion_lock);
jeb = &c->blocks[ref->flash_offset / c->sector_size];
len = ref_totlen(c, jeb, ref);
jeb->used_size += len;
jeb->unchecked_size -= len;
c->used_size += len;
c->unchecked_size -= len;
/* If node covers at least a whole page, or if it starts at the
beginning of a page and runs to the end of the file, or if
it's a hole node, mark it REF_PRISTINE, else REF_NORMAL.
If it's actually overlapped, it'll get made NORMAL (or OBSOLETE)
when the overlapping node(s) get added to the tree anyway.
*/
if ((je32_to_cpu(node.i.dsize) >= PAGE_CACHE_SIZE) ||
( ((je32_to_cpu(node.i.offset)&(PAGE_CACHE_SIZE-1))==0) &&
(je32_to_cpu(node.i.dsize)+je32_to_cpu(node.i.offset) == je32_to_cpu(node.i.isize)))) {
D1(printk(KERN_DEBUG "Marking node at 0x%08x REF_PRISTINE\n", ref_offset(ref)));
ref->flash_offset = ref_offset(ref) | REF_PRISTINE;
} else {
D1(printk(KERN_DEBUG "Marking node at 0x%08x REF_NORMAL\n", ref_offset(ref)));
ref->flash_offset = ref_offset(ref) | REF_NORMAL;
}
spin_unlock(&c->erase_completion_lock);
}
tn = jffs2_alloc_tmp_dnode_info();
if (!tn) {
D1(printk(KERN_DEBUG "alloc tn failed\n"));
err = -ENOMEM;
goto free_out;
}
tn->fn = jffs2_alloc_full_dnode();
if (!tn->fn) {
D1(printk(KERN_DEBUG "alloc fn failed\n"));
err = -ENOMEM;
jffs2_free_tmp_dnode_info(tn);
goto free_out;
}
tn->version = je32_to_cpu(node.i.version);
tn->fn->ofs = je32_to_cpu(node.i.offset);
/* There was a bug where we wrote hole nodes out with
csize/dsize swapped. Deal with it */
if (node.i.compr == JFFS2_COMPR_ZERO && !je32_to_cpu(node.i.dsize) && je32_to_cpu(node.i.csize))
tn->fn->size = je32_to_cpu(node.i.csize);
else // normal case...
tn->fn->size = je32_to_cpu(node.i.dsize);
tn->fn->raw = ref;
D1(printk(KERN_DEBUG "dnode @%08x: ver %u, offset %04x, dsize %04x\n",
ref_offset(ref), je32_to_cpu(node.i.version),
je32_to_cpu(node.i.offset), je32_to_cpu(node.i.dsize)));
jffs2_add_tn_to_tree(tn, &ret_tn);
break;
default:
if (ref_flags(ref) == REF_UNCHECKED) {
struct jffs2_eraseblock *jeb;
uint32_t len;
printk(KERN_ERR "Eep. Unknown node type %04x at %08x was marked REF_UNCHECKED\n",
je16_to_cpu(node.u.nodetype), ref_offset(ref));
/* Mark the node as having been checked and fix the accounting accordingly */
spin_lock(&c->erase_completion_lock);
jeb = &c->blocks[ref->flash_offset / c->sector_size];
len = ref_totlen(c, jeb, ref);
jeb->used_size += len;
jeb->unchecked_size -= len;
c->used_size += len;
c->unchecked_size -= len;
mark_ref_normal(ref);
spin_unlock(&c->erase_completion_lock);
/* Check we've managed to read at least the common node header */
if (retlen < sizeof(struct jffs2_unknown_node)) {
printk(KERN_WARNING "Warning! Short read unknown node at %#08x\n",
ref_offset(ref));
return -EIO;
}
node.u.nodetype = cpu_to_je16(JFFS2_NODE_ACCURATE | je16_to_cpu(node.u.nodetype));
if (crc32(0, &node, sizeof(struct jffs2_unknown_node)-4) != je32_to_cpu(node.u.hdr_crc)) {
/* Hmmm. This should have been caught at scan time. */
printk(KERN_ERR "Node header CRC failed at %08x. But it must have been OK earlier.\n",
ref_offset(ref));
printk(KERN_ERR "Node was: { %04x, %04x, %08x, %08x }\n",
je16_to_cpu(node.u.magic), je16_to_cpu(node.u.nodetype), je32_to_cpu(node.u.totlen),
je32_to_cpu(node.u.hdr_crc));
jffs2_mark_node_obsolete(c, ref);
} else switch(je16_to_cpu(node.u.nodetype) & JFFS2_COMPAT_MASK) {
case JFFS2_FEATURE_INCOMPAT:
printk(KERN_NOTICE "Unknown INCOMPAT nodetype %04X at %08x\n", je16_to_cpu(node.u.nodetype), ref_offset(ref));
/* EEP */
BUG();
break;
case JFFS2_FEATURE_ROCOMPAT:
printk(KERN_NOTICE "Unknown ROCOMPAT nodetype %04X at %08x\n", je16_to_cpu(node.u.nodetype), ref_offset(ref));
if (!(c->flags & JFFS2_SB_FLAG_RO))
BUG();
break;
case JFFS2_FEATURE_RWCOMPAT_COPY:
printk(KERN_NOTICE "Unknown RWCOMPAT_COPY nodetype %04X at %08x\n", je16_to_cpu(node.u.nodetype), ref_offset(ref));
break;
case JFFS2_FEATURE_RWCOMPAT_DELETE:
printk(KERN_NOTICE "Unknown RWCOMPAT_DELETE nodetype %04X at %08x\n", je16_to_cpu(node.u.nodetype), ref_offset(ref));
err = read_unknown(c, ref, &node.u, retlen);
if (err == 1) {
jffs2_mark_node_obsolete(c, ref);
break;
}
} else if (unlikely(err))
goto free_out;
}
spin_lock(&c->erase_completion_lock);