blob: 6c94c36998f104fc2efef3f556f26a4584c364b4 [file] [log] [blame]
/*
* JFFS2 -- Journalling Flash File System, Version 2.
*
* Copyright (C) 2001-2003 Red Hat, Inc.
*
* Created by David Woodhouse <dwmw2@redhat.com>
*
* For licensing information, see the file 'LICENCE' in this directory.
*
* $Id: nodelist.c,v 1.80 2003/10/04 08:33:06 dwmw2 Exp $
*
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/fs.h>
#include <linux/mtd/mtd.h>
#include <linux/rbtree.h>
#include <linux/crc32.h>
#include <linux/slab.h>
#include <linux/pagemap.h>
#include "nodelist.h"
void jffs2_add_fd_to_list(struct jffs2_sb_info *c, struct jffs2_full_dirent *new, struct jffs2_full_dirent **list)
{
struct jffs2_full_dirent **prev = list;
D1(printk(KERN_DEBUG "jffs2_add_fd_to_list( %p, %p (->%p))\n", new, list, *list));
while ((*prev) && (*prev)->nhash <= new->nhash) {
if ((*prev)->nhash == new->nhash && !strcmp((*prev)->name, new->name)) {
/* Duplicate. Free one */
if (new->version < (*prev)->version) {
D1(printk(KERN_DEBUG "Eep! Marking new dirent node obsolete\n"));
D1(printk(KERN_DEBUG "New dirent is \"%s\"->ino #%u. Old is \"%s\"->ino #%u\n", new->name, new->ino, (*prev)->name, (*prev)->ino));
jffs2_mark_node_obsolete(c, new->raw);
jffs2_free_full_dirent(new);
} else {
D1(printk(KERN_DEBUG "Marking old dirent node (ino #%u) obsolete\n", (*prev)->ino));
new->next = (*prev)->next;
jffs2_mark_node_obsolete(c, ((*prev)->raw));
jffs2_free_full_dirent(*prev);
*prev = new;
}
goto out;
}
prev = &((*prev)->next);
}
new->next = *prev;
*prev = new;
out:
D2(while(*list) {
printk(KERN_DEBUG "Dirent \"%s\" (hash 0x%08x, ino #%u\n", (*list)->name, (*list)->nhash, (*list)->ino);
list = &(*list)->next;
});
}
/* Put a new tmp_dnode_info into the list, keeping the list in
order of increasing version
*/
void jffs2_add_tn_to_list(struct jffs2_tmp_dnode_info *tn, struct jffs2_tmp_dnode_info **list)
{
struct jffs2_tmp_dnode_info **prev = list;
while ((*prev) && (*prev)->version < tn->version) {
prev = &((*prev)->next);
}
tn->next = (*prev);
*prev = tn;
}
static void jffs2_free_tmp_dnode_info_list(struct jffs2_tmp_dnode_info *tn)
{
struct jffs2_tmp_dnode_info *next;
while (tn) {
next = tn;
tn = tn->next;
jffs2_free_full_dnode(next->fn);
jffs2_free_tmp_dnode_info(next);
}
}
static void jffs2_free_full_dirent_list(struct jffs2_full_dirent *fd)
{
struct jffs2_full_dirent *next;
while (fd) {
next = fd->next;
jffs2_free_full_dirent(fd);
fd = next;
}
}
/* Get tmp_dnode_info and full_dirent for all non-obsolete nodes associated
with this ino, returning the former in order of version */
int jffs2_get_inode_nodes(struct jffs2_sb_info *c, ino_t ino, struct jffs2_inode_info *f,
struct jffs2_tmp_dnode_info **tnp, struct jffs2_full_dirent **fdp,
uint32_t *highest_version, uint32_t *latest_mctime,
uint32_t *mctime_ver)
{
struct jffs2_raw_node_ref *ref = f->inocache->nodes;
struct jffs2_tmp_dnode_info *tn, *ret_tn = NULL;
struct jffs2_full_dirent *fd, *ret_fd = NULL;
union jffs2_node_union node;
size_t retlen;
int err;
*mctime_ver = 0;
D1(printk(KERN_DEBUG "jffs2_get_inode_nodes(): ino #%lu\n", ino));
if (!f->inocache->nodes) {
printk(KERN_WARNING "Eep. no nodes for ino #%lu\n", (unsigned long)ino);
}
spin_lock(&c->erase_completion_lock);
for (ref = f->inocache->nodes; ref && ref->next_in_ino; ref = ref->next_in_ino) {
/* Work out whether it's a data node or a dirent node */
if (ref_obsolete(ref)) {
/* FIXME: On NAND flash we may need to read these */
D1(printk(KERN_DEBUG "node at 0x%08x is obsoleted. Ignoring.\n", ref_offset(ref)));
continue;
}
/* We can hold a pointer to a non-obsolete node without the spinlock,
but _obsolete_ nodes may disappear at any time, if the block
they're in gets erased */
spin_unlock(&c->erase_completion_lock);
cond_resched();
/* FIXME: point() */
err = jffs2_flash_read(c, (ref_offset(ref)), min_t(uint32_t, ref->totlen, sizeof(node)), &retlen, (void *)&node);
if (err) {
printk(KERN_WARNING "error %d reading node at 0x%08x in get_inode_nodes()\n", err, ref_offset(ref));
goto free_out;
}
/* Check we've managed to read at least the common node header */
if (retlen < min_t(uint32_t, ref->totlen, 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");
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));
jffs2_mark_node_obsolete(c, ref);
spin_lock(&c->erase_completion_lock);
continue;
}
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;
}
memset(fd,0,sizeof(struct jffs2_full_dirent) + node.d.nsize+1);
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;
/* 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");
err = -EIO;
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));
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;
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];
jeb->used_size += ref->totlen;
jeb->unchecked_size -= ref->totlen;
c->used_size += ref->totlen;
c->unchecked_size -= ref->totlen;
/* 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_list(tn, &ret_tn);
break;
default:
if (ref_flags(ref) == REF_UNCHECKED) {
struct jffs2_eraseblock *jeb;
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];
jeb->used_size += ref->totlen;
jeb->unchecked_size -= ref->totlen;
c->used_size += ref->totlen;
c->unchecked_size -= ref->totlen;
mark_ref_normal(ref);
spin_unlock(&c->erase_completion_lock);
}
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));
jffs2_mark_node_obsolete(c, ref);
break;
}
}
spin_lock(&c->erase_completion_lock);
}
spin_unlock(&c->erase_completion_lock);
*tnp = ret_tn;
*fdp = ret_fd;
return 0;
free_out:
jffs2_free_tmp_dnode_info_list(ret_tn);
jffs2_free_full_dirent_list(ret_fd);
return err;
}
void jffs2_set_inocache_state(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic, int state)
{
spin_lock(&c->inocache_lock);
ic->state = state;
wake_up(&c->inocache_wq);
spin_unlock(&c->inocache_lock);
}
/* During mount, this needs no locking. During normal operation, its
callers want to do other stuff while still holding the inocache_lock.
Rather than introducing special case get_ino_cache functions or
callbacks, we just let the caller do the locking itself. */
struct jffs2_inode_cache *jffs2_get_ino_cache(struct jffs2_sb_info *c, uint32_t ino)
{
struct jffs2_inode_cache *ret;
D2(printk(KERN_DEBUG "jffs2_get_ino_cache(): ino %u\n", ino));
ret = c->inocache_list[ino % INOCACHE_HASHSIZE];
while (ret && ret->ino < ino) {
ret = ret->next;
}
if (ret && ret->ino != ino)
ret = NULL;
D2(printk(KERN_DEBUG "jffs2_get_ino_cache found %p for ino %u\n", ret, ino));
return ret;
}
void jffs2_add_ino_cache (struct jffs2_sb_info *c, struct jffs2_inode_cache *new)
{
struct jffs2_inode_cache **prev;
D2(printk(KERN_DEBUG "jffs2_add_ino_cache: Add %p (ino #%u)\n", new, new->ino));
spin_lock(&c->inocache_lock);
prev = &c->inocache_list[new->ino % INOCACHE_HASHSIZE];
while ((*prev) && (*prev)->ino < new->ino) {
prev = &(*prev)->next;
}
new->next = *prev;
*prev = new;
spin_unlock(&c->inocache_lock);
}
void jffs2_del_ino_cache(struct jffs2_sb_info *c, struct jffs2_inode_cache *old)
{
struct jffs2_inode_cache **prev;
D2(printk(KERN_DEBUG "jffs2_del_ino_cache: Del %p (ino #%u)\n", old, old->ino));
spin_lock(&c->inocache_lock);
prev = &c->inocache_list[old->ino % INOCACHE_HASHSIZE];
while ((*prev) && (*prev)->ino < old->ino) {
prev = &(*prev)->next;
}
if ((*prev) == old) {
*prev = old->next;
}
spin_unlock(&c->inocache_lock);
}
void jffs2_free_ino_caches(struct jffs2_sb_info *c)
{
int i;
struct jffs2_inode_cache *this, *next;
for (i=0; i<INOCACHE_HASHSIZE; i++) {
this = c->inocache_list[i];
while (this) {
next = this->next;
D2(printk(KERN_DEBUG "jffs2_free_ino_caches: Freeing ino #%u at %p\n", this->ino, this));
jffs2_free_inode_cache(this);
this = next;
}
c->inocache_list[i] = NULL;
}
}
void jffs2_free_raw_node_refs(struct jffs2_sb_info *c)
{
int i;
struct jffs2_raw_node_ref *this, *next;
for (i=0; i<c->nr_blocks; i++) {
this = c->blocks[i].first_node;
while(this) {
next = this->next_phys;
jffs2_free_raw_node_ref(this);
this = next;
}
c->blocks[i].first_node = c->blocks[i].last_node = NULL;
}
}
struct jffs2_node_frag *jffs2_lookup_node_frag(struct rb_root *fragtree, uint32_t offset)
{
/* The common case in lookup is that there will be a node
which precisely matches. So we go looking for that first */
struct rb_node *next;
struct jffs2_node_frag *prev = NULL;
struct jffs2_node_frag *frag = NULL;
D2(printk(KERN_DEBUG "jffs2_lookup_node_frag(%p, %d)\n", fragtree, offset));
next = fragtree->rb_node;
while(next) {
frag = rb_entry(next, struct jffs2_node_frag, rb);
D2(printk(KERN_DEBUG "Considering frag %d-%d (%p). left %p, right %p\n",
frag->ofs, frag->ofs+frag->size, frag, frag->rb.rb_left, frag->rb.rb_right));
if (frag->ofs + frag->size <= offset) {
D2(printk(KERN_DEBUG "Going right from frag %d-%d, before the region we care about\n",
frag->ofs, frag->ofs+frag->size));
/* Remember the closest smaller match on the way down */
if (!prev || frag->ofs > prev->ofs)
prev = frag;
next = frag->rb.rb_right;
} else if (frag->ofs > offset) {
D2(printk(KERN_DEBUG "Going left from frag %d-%d, after the region we care about\n",
frag->ofs, frag->ofs+frag->size));
next = frag->rb.rb_left;
} else {
D2(printk(KERN_DEBUG "Returning frag %d,%d, matched\n",
frag->ofs, frag->ofs+frag->size));
return frag;
}
}
/* Exact match not found. Go back up looking at each parent,
and return the closest smaller one */
if (prev)
D2(printk(KERN_DEBUG "No match. Returning frag %d,%d, closest previous\n",
prev->ofs, prev->ofs+prev->size));
else
D2(printk(KERN_DEBUG "Returning NULL, empty fragtree\n"));
return prev;
}
/* Pass 'c' argument to indicate that nodes should be marked obsolete as
they're killed. */
void jffs2_kill_fragtree(struct rb_root *root, struct jffs2_sb_info *c)
{
struct jffs2_node_frag *frag;
struct jffs2_node_frag *parent;
if (!root->rb_node)
return;
frag = (rb_entry(root->rb_node, struct jffs2_node_frag, rb));
while(frag) {
if (frag->rb.rb_left) {
D2(printk(KERN_DEBUG "Going left from frag (%p) %d-%d\n",
frag, frag->ofs, frag->ofs+frag->size));
frag = frag_left(frag);
continue;
}
if (frag->rb.rb_right) {
D2(printk(KERN_DEBUG "Going right from frag (%p) %d-%d\n",
frag, frag->ofs, frag->ofs+frag->size));
frag = frag_right(frag);
continue;
}
D2(printk(KERN_DEBUG "jffs2_kill_fragtree: frag at 0x%x-0x%x: node %p, frags %d--\n",
frag->ofs, frag->ofs+frag->size, frag->node,
frag->node?frag->node->frags:0));
if (frag->node && !(--frag->node->frags)) {
/* Not a hole, and it's the final remaining frag
of this node. Free the node */
if (c)
jffs2_mark_node_obsolete(c, frag->node->raw);
jffs2_free_full_dnode(frag->node);
}
parent = frag_parent(frag);
if (parent) {
if (frag_left(parent) == frag)
parent->rb.rb_left = NULL;
else
parent->rb.rb_right = NULL;
}
jffs2_free_node_frag(frag);
frag = parent;
}
}
void jffs2_fragtree_insert(struct jffs2_node_frag *newfrag, struct jffs2_node_frag *base)
{
struct rb_node *parent = &base->rb;
struct rb_node **link = &parent;
D2(printk(KERN_DEBUG "jffs2_fragtree_insert(%p; %d-%d, %p)\n", newfrag,
newfrag->ofs, newfrag->ofs+newfrag->size, base));
while (*link) {
parent = *link;
base = rb_entry(parent, struct jffs2_node_frag, rb);
D2(printk(KERN_DEBUG "fragtree_insert considering frag at 0x%x\n", base->ofs));
if (newfrag->ofs > base->ofs)
link = &base->rb.rb_right;
else if (newfrag->ofs < base->ofs)
link = &base->rb.rb_left;
else {
printk(KERN_CRIT "Duplicate frag at %08x (%p,%p)\n", newfrag->ofs, newfrag, base);
BUG();
}
}
rb_link_node(&newfrag->rb, &base->rb, link);
}