Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/fs/jffs2/nodelist.c b/fs/jffs2/nodelist.c
new file mode 100644
index 0000000..cd6a8bd
--- /dev/null
+++ b/fs/jffs2/nodelist.c
@@ -0,0 +1,681 @@
+/*
+ * JFFS2 -- Journalling Flash File System, Version 2.
+ *
+ * Copyright (C) 2001-2003 Red Hat, Inc.
+ *
+ * Created by David Woodhouse <dwmw2@infradead.org>
+ *
+ * For licensing information, see the file 'LICENCE' in this directory.
+ *
+ * $Id: nodelist.c,v 1.90 2004/12/08 17:59:20 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
+*/
+static 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;
+ }
+}
+
+/* Returns first valid node after 'ref'. May return 'ref' */
+static struct jffs2_raw_node_ref *jffs2_first_valid_node(struct jffs2_raw_node_ref *ref)
+{
+ while (ref && ref->next_in_ino) {
+ if (!ref_obsolete(ref))
+ return ref;
+ D1(printk(KERN_DEBUG "node at 0x%08x is obsoleted. Ignoring.\n", ref_offset(ref)));
+ ref = ref->next_in_ino;
+ }
+ return NULL;
+}
+
+/* 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, 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, *valid_ref;
+ 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 #%u\n", f->inocache->ino));
+
+ spin_lock(&c->erase_completion_lock);
+
+ valid_ref = jffs2_first_valid_node(f->inocache->nodes);
+
+ if (!valid_ref)
+ printk(KERN_WARNING "Eep. No valid nodes for ino #%u\n", f->inocache->ino);
+
+ while (valid_ref) {
+ /* 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. So if we mark 'ref' obsolete while we're
+ not holding the lock, it can go away immediately. For that reason,
+ we find the next valid node first, before processing 'ref'.
+ */
+ ref = valid_ref;
+ valid_ref = jffs2_first_valid_node(ref->next_in_ino);
+ spin_unlock(&c->erase_completion_lock);
+
+ cond_resched();
+
+ /* FIXME: point() */
+ err = jffs2_flash_read(c, (ref_offset(ref)),
+ min_t(uint32_t, ref_totlen(c, NULL, ref), 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(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");
+ 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;
+ }
+ 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");
+ 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, 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_list(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);
+ }
+ 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;
+
+ cond_resched();
+ }
+}
+
+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);
+}