*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: nodelist.c,v 1.90 2004/12/08 17:59:20 dwmw2 Exp $
+ * $Id: nodelist.c,v 1.115 2005/11/07 11:14:40 gleixner Exp $
*
*/
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));
+
+ dbg_dentlist("add dirent \"%s\", ino #%u\n", new->name, new->ino);
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));
+ dbg_dentlist("Eep! Marking new dirent node is obsolete, old is \"%s\", ino #%u\n",
+ (*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));
+ dbg_dentlist("marking old dirent \"%s\", ino #%u bsolete\n",
+ (*prev)->name, (*prev)->ino);
new->next = (*prev)->next;
jffs2_mark_node_obsolete(c, ((*prev)->raw));
jffs2_free_full_dirent(*prev);
*prev = new;
}
- goto out;
+ return;
}
prev = &((*prev)->next);
}
new->next = *prev;
*prev = new;
+}
+
+void jffs2_truncate_fragtree(struct jffs2_sb_info *c, struct rb_root *list, uint32_t size)
+{
+ struct jffs2_node_frag *frag = jffs2_lookup_node_frag(list, size);
+
+ dbg_fragtree("truncating fragtree to 0x%08x bytes\n", size);
+
+ /* We know frag->ofs <= size. That's what lookup does for us */
+ if (frag && frag->ofs != size) {
+ if (frag->ofs+frag->size > size) {
+ frag->size = size - frag->ofs;
+ }
+ frag = frag_next(frag);
+ }
+ while (frag && frag->ofs >= size) {
+ struct jffs2_node_frag *next = frag_next(frag);
+
+ frag_erase(frag, list);
+ jffs2_obsolete_node_frag(c, frag);
+ frag = next;
+ }
- out:
- D2(while(*list) {
- printk(KERN_DEBUG "Dirent \"%s\" (hash 0x%08x, ino #%u\n", (*list)->name, (*list)->nhash, (*list)->ino);
- list = &(*list)->next;
- });
+ if (size == 0)
+ return;
+
+ /*
+ * If the last fragment starts at the RAM page boundary, it is
+ * REF_PRISTINE irrespective of its size.
+ */
+ frag = frag_last(list);
+ if (frag->node && (frag->ofs & (PAGE_CACHE_SIZE - 1)) == 0) {
+ dbg_fragtree2("marking the last fragment 0x%08x-0x%08x REF_PRISTINE.\n",
+ frag->ofs, frag->ofs + frag->size);
+ frag->node->raw->flash_offset = ref_offset(frag->node->raw) | REF_PRISTINE;
+ }
}
-/* 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)
+void jffs2_obsolete_node_frag(struct jffs2_sb_info *c, struct jffs2_node_frag *this)
{
- struct jffs2_tmp_dnode_info **prev = list;
-
- while ((*prev) && (*prev)->version < tn->version) {
- prev = &((*prev)->next);
+ if (this->node) {
+ this->node->frags--;
+ if (!this->node->frags) {
+ /* The node has no valid frags left. It's totally obsoleted */
+ dbg_fragtree2("marking old node @0x%08x (0x%04x-0x%04x) obsolete\n",
+ ref_offset(this->node->raw), this->node->ofs, this->node->ofs+this->node->size);
+ jffs2_mark_node_obsolete(c, this->node->raw);
+ jffs2_free_full_dnode(this->node);
+ } else {
+ dbg_fragtree2("marking old node @0x%08x (0x%04x-0x%04x) REF_NORMAL. frags is %d\n",
+ ref_offset(this->node->raw), this->node->ofs, this->node->ofs+this->node->size, this->node->frags);
+ mark_ref_normal(this->node->raw);
+ }
+
}
- tn->next = (*prev);
- *prev = tn;
+ jffs2_free_node_frag(this);
}
-static void jffs2_free_tmp_dnode_info_list(struct jffs2_tmp_dnode_info *tn)
+static void jffs2_fragtree_insert(struct jffs2_node_frag *newfrag, struct jffs2_node_frag *base)
{
- struct jffs2_tmp_dnode_info *next;
+ struct rb_node *parent = &base->rb;
+ struct rb_node **link = &parent;
+
+ dbg_fragtree2("insert frag (0x%04x-0x%04x)\n", newfrag->ofs, newfrag->ofs + newfrag->size);
+
+ while (*link) {
+ parent = *link;
+ base = rb_entry(parent, struct jffs2_node_frag, rb);
+
+ if (newfrag->ofs > base->ofs)
+ link = &base->rb.rb_right;
+ else if (newfrag->ofs < base->ofs)
+ link = &base->rb.rb_left;
+ else {
+ JFFS2_ERROR("duplicate frag at %08x (%p,%p)\n", newfrag->ofs, newfrag, base);
+ BUG();
+ }
+ }
+
+ rb_link_node(&newfrag->rb, &base->rb, link);
+}
- while (tn) {
- next = tn;
- tn = tn->next;
- jffs2_free_full_dnode(next->fn);
- jffs2_free_tmp_dnode_info(next);
+/*
+ * Allocate and initializes a new fragment.
+ */
+static struct jffs2_node_frag * new_fragment(struct jffs2_full_dnode *fn, uint32_t ofs, uint32_t size)
+{
+ struct jffs2_node_frag *newfrag;
+
+ newfrag = jffs2_alloc_node_frag();
+ if (likely(newfrag)) {
+ newfrag->ofs = ofs;
+ newfrag->size = size;
+ newfrag->node = fn;
+ } else {
+ JFFS2_ERROR("cannot allocate a jffs2_node_frag object\n");
}
+
+ return newfrag;
}
-static void jffs2_free_full_dirent_list(struct jffs2_full_dirent *fd)
+/*
+ * Called when there is no overlapping fragment exist. Inserts a hole before the new
+ * fragment and inserts the new fragment to the fragtree.
+ */
+static int no_overlapping_node(struct jffs2_sb_info *c, struct rb_root *root,
+ struct jffs2_node_frag *newfrag,
+ struct jffs2_node_frag *this, uint32_t lastend)
{
- struct jffs2_full_dirent *next;
+ if (lastend < newfrag->node->ofs) {
+ /* put a hole in before the new fragment */
+ struct jffs2_node_frag *holefrag;
+
+ holefrag= new_fragment(NULL, lastend, newfrag->node->ofs - lastend);
+ if (unlikely(!holefrag)) {
+ jffs2_free_node_frag(newfrag);
+ return -ENOMEM;
+ }
- while (fd) {
- next = fd->next;
- jffs2_free_full_dirent(fd);
- fd = next;
+ if (this) {
+ /* By definition, the 'this' node has no right-hand child,
+ because there are no frags with offset greater than it.
+ So that's where we want to put the hole */
+ dbg_fragtree2("add hole frag %#04x-%#04x on the right of the new frag.\n",
+ holefrag->ofs, holefrag->ofs + holefrag->size);
+ rb_link_node(&holefrag->rb, &this->rb, &this->rb.rb_right);
+ } else {
+ dbg_fragtree2("Add hole frag %#04x-%#04x to the root of the tree.\n",
+ holefrag->ofs, holefrag->ofs + holefrag->size);
+ rb_link_node(&holefrag->rb, NULL, &root->rb_node);
+ }
+ rb_insert_color(&holefrag->rb, root);
+ this = holefrag;
}
+
+ if (this) {
+ /* By definition, the 'this' node has no right-hand child,
+ because there are no frags with offset greater than it.
+ So that's where we want to put new fragment */
+ dbg_fragtree2("add the new node at the right\n");
+ rb_link_node(&newfrag->rb, &this->rb, &this->rb.rb_right);
+ } else {
+ dbg_fragtree2("insert the new node at the root of the tree\n");
+ rb_link_node(&newfrag->rb, NULL, &root->rb_node);
+ }
+ rb_insert_color(&newfrag->rb, root);
+
+ return 0;
}
-/* 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)
+/* Doesn't set inode->i_size */
+static int jffs2_add_frag_to_fragtree(struct jffs2_sb_info *c, struct rb_root *root, struct jffs2_node_frag *newfrag)
{
- 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;
+ struct jffs2_node_frag *this;
+ uint32_t lastend;
+
+ /* Skip all the nodes which are completed before this one starts */
+ this = jffs2_lookup_node_frag(root, newfrag->node->ofs);
+
+ if (this) {
+ dbg_fragtree2("lookup gave frag 0x%04x-0x%04x; phys 0x%08x (*%p)\n",
+ this->ofs, this->ofs+this->size, this->node?(ref_offset(this->node->raw)):0xffffffff, this);
+ lastend = this->ofs + this->size;
+ } else {
+ dbg_fragtree2("lookup gave no frag\n");
+ lastend = 0;
+ }
+
+ /* See if we ran off the end of the fragtree */
+ if (lastend <= newfrag->ofs) {
+ /* We did */
+
+ /* Check if 'this' node was on the same page as the new node.
+ If so, both 'this' and the new node get marked REF_NORMAL so
+ the GC can take a look.
+ */
+ if (lastend && (lastend-1) >> PAGE_CACHE_SHIFT == newfrag->ofs >> PAGE_CACHE_SHIFT) {
+ if (this->node)
+ mark_ref_normal(this->node->raw);
+ mark_ref_normal(newfrag->node->raw);
+ }
+
+ return no_overlapping_node(c, root, newfrag, this, lastend);
+ }
+
+ if (this->node)
+ dbg_fragtree2("dealing with frag %u-%u, phys %#08x(%d).\n",
+ this->ofs, this->ofs + this->size,
+ ref_offset(this->node->raw), ref_flags(this->node->raw));
+ else
+ dbg_fragtree2("dealing with hole frag %u-%u.\n",
+ this->ofs, this->ofs + this->size);
+
+ /* OK. 'this' is pointing at the first frag that newfrag->ofs at least partially obsoletes,
+ * - i.e. newfrag->ofs < this->ofs+this->size && newfrag->ofs >= this->ofs
+ */
+ if (newfrag->ofs > this->ofs) {
+ /* This node isn't completely obsoleted. The start of it remains valid */
+
+ /* Mark the new node and the partially covered node REF_NORMAL -- let
+ the GC take a look at them */
+ mark_ref_normal(newfrag->node->raw);
+ if (this->node)
+ mark_ref_normal(this->node->raw);
+
+ if (this->ofs + this->size > newfrag->ofs + newfrag->size) {
+ /* The new node splits 'this' frag into two */
+ struct jffs2_node_frag *newfrag2;
+
+ if (this->node)
+ dbg_fragtree2("split old frag 0x%04x-0x%04x, phys 0x%08x\n",
+ this->ofs, this->ofs+this->size, ref_offset(this->node->raw));
+ else
+ dbg_fragtree2("split old hole frag 0x%04x-0x%04x\n",
+ this->ofs, this->ofs+this->size);
+
+ /* New second frag pointing to this's node */
+ newfrag2 = new_fragment(this->node, newfrag->ofs + newfrag->size,
+ this->ofs + this->size - newfrag->ofs - newfrag->size);
+ if (unlikely(!newfrag2))
+ return -ENOMEM;
+ if (this->node)
+ this->node->frags++;
+
+ /* Adjust size of original 'this' */
+ this->size = newfrag->ofs - this->ofs;
+
+ /* Now, we know there's no node with offset
+ greater than this->ofs but smaller than
+ newfrag2->ofs or newfrag->ofs, for obvious
+ reasons. So we can do a tree insert from
+ 'this' to insert newfrag, and a tree insert
+ from newfrag to insert newfrag2. */
+ jffs2_fragtree_insert(newfrag, this);
+ rb_insert_color(&newfrag->rb, root);
+
+ jffs2_fragtree_insert(newfrag2, newfrag);
+ rb_insert_color(&newfrag2->rb, root);
+
+ return 0;
+ }
+ /* New node just reduces 'this' frag in size, doesn't split it */
+ this->size = newfrag->ofs - this->ofs;
+
+ /* Again, we know it lives down here in the tree */
+ jffs2_fragtree_insert(newfrag, this);
+ rb_insert_color(&newfrag->rb, root);
+ } else {
+ /* New frag starts at the same point as 'this' used to. Replace
+ it in the tree without doing a delete and insertion */
+ dbg_fragtree2("inserting newfrag (*%p),%d-%d in before 'this' (*%p),%d-%d\n",
+ newfrag, newfrag->ofs, newfrag->ofs+newfrag->size, this, this->ofs, this->ofs+this->size);
+
+ rb_replace_node(&this->rb, &newfrag->rb, root);
+
+ if (newfrag->ofs + newfrag->size >= this->ofs+this->size) {
+ dbg_fragtree2("obsoleting node frag %p (%x-%x)\n", this, this->ofs, this->ofs+this->size);
+ jffs2_obsolete_node_frag(c, this);
+ } else {
+ this->ofs += newfrag->size;
+ this->size -= newfrag->size;
+
+ jffs2_fragtree_insert(this, newfrag);
+ rb_insert_color(&this->rb, root);
+ return 0;
+ }
}
- return NULL;
+ /* OK, now we have newfrag added in the correct place in the tree, but
+ frag_next(newfrag) may be a fragment which is overlapped by it
+ */
+ while ((this = frag_next(newfrag)) && newfrag->ofs + newfrag->size >= this->ofs + this->size) {
+ /* 'this' frag is obsoleted completely. */
+ dbg_fragtree2("obsoleting node frag %p (%x-%x) and removing from tree\n",
+ this, this->ofs, this->ofs+this->size);
+ rb_erase(&this->rb, root);
+ jffs2_obsolete_node_frag(c, this);
+ }
+ /* Now we're pointing at the first frag which isn't totally obsoleted by
+ the new frag */
+
+ if (!this || newfrag->ofs + newfrag->size == this->ofs)
+ return 0;
+
+ /* Still some overlap but we don't need to move it in the tree */
+ this->size = (this->ofs + this->size) - (newfrag->ofs + newfrag->size);
+ this->ofs = newfrag->ofs + newfrag->size;
+
+ /* And mark them REF_NORMAL so the GC takes a look at them */
+ if (this->node)
+ mark_ref_normal(this->node->raw);
+ mark_ref_normal(newfrag->node->raw);
+
+ 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 */
+/*
+ * Given an inode, probably with existing tree of fragments, add the new node
+ * to the fragment tree.
+ */
+int jffs2_add_full_dnode_to_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_full_dnode *fn)
+{
+ int ret;
+ struct jffs2_node_frag *newfrag;
+
+ if (unlikely(!fn->size))
+ return 0;
+
+ newfrag = new_fragment(fn, fn->ofs, fn->size);
+ if (unlikely(!newfrag))
+ return -ENOMEM;
+ newfrag->node->frags = 1;
+
+ dbg_fragtree("adding node %#04x-%#04x @0x%08x on flash, newfrag *%p\n",
+ fn->ofs, fn->ofs+fn->size, ref_offset(fn->raw), newfrag);
+
+ ret = jffs2_add_frag_to_fragtree(c, &f->fragtree, newfrag);
+ if (unlikely(ret))
+ return ret;
+
+ /* If we now share a page with other nodes, mark either previous
+ or next node REF_NORMAL, as appropriate. */
+ if (newfrag->ofs & (PAGE_CACHE_SIZE-1)) {
+ struct jffs2_node_frag *prev = frag_prev(newfrag);
+
+ mark_ref_normal(fn->raw);
+ /* If we don't start at zero there's _always_ a previous */
+ if (prev->node)
+ mark_ref_normal(prev->node->raw);
+ }
+
+ if ((newfrag->ofs+newfrag->size) & (PAGE_CACHE_SIZE-1)) {
+ struct jffs2_node_frag *next = frag_next(newfrag);
+
+ if (next) {
+ mark_ref_normal(fn->raw);
+ if (next->node)
+ mark_ref_normal(next->node->raw);
+ }
+ }
+ jffs2_dbg_fragtree_paranoia_check_nolock(f);
+
+ return 0;
+}
-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)
+/*
+ * Check the data CRC of the node.
+ *
+ * Returns: 0 if the data CRC is correct;
+ * 1 - if incorrect;
+ * error code if an error occured.
+ */
+static int check_node_data(struct jffs2_sb_info *c, struct jffs2_tmp_dnode_info *tn)
{
- 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;
+ struct jffs2_raw_node_ref *ref = tn->fn->raw;
+ int err = 0, pointed = 0;
+ struct jffs2_eraseblock *jeb;
+ unsigned char *buffer;
+ uint32_t crc, ofs, len;
size_t retlen;
- int err;
- *mctime_ver = 0;
-
- D1(printk(KERN_DEBUG "jffs2_get_inode_nodes(): ino #%u\n", f->inocache->ino));
+ BUG_ON(tn->csize == 0);
- spin_lock(&c->erase_completion_lock);
+ if (!jffs2_is_writebuffered(c))
+ goto adj_acc;
- valid_ref = jffs2_first_valid_node(f->inocache->nodes);
+ /* Calculate how many bytes were already checked */
+ ofs = ref_offset(ref) + sizeof(struct jffs2_raw_inode);
+ len = ofs % c->wbuf_pagesize;
+ if (likely(len))
+ len = c->wbuf_pagesize - len;
- if (!valid_ref)
- printk(KERN_WARNING "Eep. No valid nodes for ino #%u\n", f->inocache->ino);
+ if (len >= tn->csize) {
+ dbg_readinode("no need to check node at %#08x, data length %u, data starts at %#08x - it has already been checked.\n",
+ ref_offset(ref), tn->csize, ofs);
+ goto adj_acc;
+ }
- 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);
+ ofs += len;
+ len = tn->csize - len;
- cond_resched();
+ dbg_readinode("check node at %#08x, data length %u, partial CRC %#08x, correct CRC %#08x, data starts at %#08x, start checking from %#08x - %u bytes.\n",
+ ref_offset(ref), tn->csize, tn->partial_crc, tn->data_crc, ofs - len, ofs, len);
+
+#ifndef __ECOS
+ /* TODO: instead, incapsulate point() stuff to jffs2_flash_read(),
+ * adding and jffs2_flash_read_end() interface. */
+ if (c->mtd->point) {
+ err = c->mtd->point(c->mtd, ofs, len, &retlen, &buffer);
+ if (!err && retlen < tn->csize) {
+ JFFS2_WARNING("MTD point returned len too short: %zu "
+ "instead of %u.\n", retlen, tn->csize);
+ c->mtd->unpoint(c->mtd, buffer, ofs, len);
+ } else if (err)
+ JFFS2_WARNING("MTD point failed: error code %d.\n", err);
+ else
+ pointed = 1; /* succefully pointed to device */
+ }
+#endif
- /* 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 (!pointed) {
+ buffer = kmalloc(len, GFP_KERNEL);
+ if (unlikely(!buffer))
+ return -ENOMEM;
+
+ /* TODO: this is very frequent pattern, make it a separate
+ * routine */
+ err = jffs2_flash_read(c, ofs, len, &retlen, buffer);
if (err) {
- printk(KERN_WARNING "error %d reading node at 0x%08x in get_inode_nodes()\n", err, ref_offset(ref));
+ JFFS2_ERROR("can not read %d bytes from 0x%08x, error code: %d.\n", len, ofs, err);
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");
+ if (retlen != len) {
+ JFFS2_ERROR("short read at %#08x: %zd instead of %d.\n",
+ ofs, retlen, len);
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();
- }
+ /* Continue calculating CRC */
+ crc = crc32(tn->partial_crc, buffer, len);
+ if(!pointed)
+ kfree(buffer);
+#ifndef __ECOS
+ else
+ c->mtd->unpoint(c->mtd, buffer, ofs, len);
+#endif
- /* 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 (crc != tn->data_crc) {
+ JFFS2_NOTICE("wrong data CRC in data node at 0x%08x: read %#08x, calculated %#08x.\n",
+ ofs, tn->data_crc, crc);
+ return 1;
+ }
- 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);
+adj_acc:
+ jeb = &c->blocks[ref->flash_offset / c->sector_size];
+ len = ref_totlen(c, jeb, ref);
+
+ /*
+ * Mark the node as having been checked and fix the
+ * accounting accordingly.
+ */
+ spin_lock(&c->erase_completion_lock);
+ jeb->used_size += len;
+ jeb->unchecked_size -= len;
+ c->used_size += len;
+ c->unchecked_size -= len;
+ spin_unlock(&c->erase_completion_lock);
+
+ return 0;
+
+free_out:
+ if(!pointed)
+ kfree(buffer);
#ifndef __ECOS
- else
- c->mtd->unpoint(c->mtd, buf, ref_offset(ref) + sizeof(node.i), je32_to_cpu(node.i.csize));
+ else
+ c->mtd->unpoint(c->mtd, buffer, ofs, len);
#endif
+ return err;
+}
- 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;
- }
-
- }
+/*
+ * Helper function for jffs2_add_older_frag_to_fragtree().
+ *
+ * Checks the node if we are in the checking stage.
+ */
+static int check_node(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_tmp_dnode_info *tn)
+{
+ int ret;
- /* 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);
+ BUG_ON(ref_obsolete(tn->fn->raw));
+
+ /* We only check the data CRC of unchecked nodes */
+ if (ref_flags(tn->fn->raw) != REF_UNCHECKED)
+ return 0;
+
+ dbg_fragtree2("check node %#04x-%#04x, phys offs %#08x.\n",
+ tn->fn->ofs, tn->fn->ofs + tn->fn->size, ref_offset(tn->fn->raw));
+
+ ret = check_node_data(c, tn);
+ if (unlikely(ret < 0)) {
+ JFFS2_ERROR("check_node_data() returned error: %d.\n",
+ ret);
+ } else if (unlikely(ret > 0)) {
+ dbg_fragtree2("CRC error, mark it obsolete.\n");
+ jffs2_mark_node_obsolete(c, tn->fn->raw);
+ }
+
+ return ret;
+}
+
+/*
+ * Helper function for jffs2_add_older_frag_to_fragtree().
+ *
+ * Called when the new fragment that is being inserted
+ * splits a hole fragment.
+ */
+static int split_hole(struct jffs2_sb_info *c, struct rb_root *root,
+ struct jffs2_node_frag *newfrag, struct jffs2_node_frag *hole)
+{
+ dbg_fragtree2("fragment %#04x-%#04x splits the hole %#04x-%#04x\n",
+ newfrag->ofs, newfrag->ofs + newfrag->size, hole->ofs, hole->ofs + hole->size);
+
+ if (hole->ofs == newfrag->ofs) {
+ /*
+ * Well, the new fragment actually starts at the same offset as
+ * the hole.
+ */
+ if (hole->ofs + hole->size > newfrag->ofs + newfrag->size) {
+ /*
+ * We replace the overlapped left part of the hole by
+ * the new node.
+ */
+
+ dbg_fragtree2("insert fragment %#04x-%#04x and cut the left part of the hole\n",
+ newfrag->ofs, newfrag->ofs + newfrag->size);
+ rb_replace_node(&hole->rb, &newfrag->rb, root);
+
+ hole->ofs += newfrag->size;
+ hole->size -= newfrag->size;
+
+ /*
+ * We know that 'hole' should be the right hand
+ * fragment.
+ */
+ jffs2_fragtree_insert(hole, newfrag);
+ rb_insert_color(&hole->rb, root);
+ } else {
+ /*
+ * Ah, the new fragment is of the same size as the hole.
+ * Relace the hole by it.
+ */
+ dbg_fragtree2("insert fragment %#04x-%#04x and overwrite hole\n",
+ newfrag->ofs, newfrag->ofs + newfrag->size);
+ rb_replace_node(&hole->rb, &newfrag->rb, root);
+ jffs2_free_node_frag(hole);
+ }
+ } else {
+ /* The new fragment lefts some hole space at the left */
+
+ struct jffs2_node_frag * newfrag2 = NULL;
+
+ if (hole->ofs + hole->size > newfrag->ofs + newfrag->size) {
+ /* The new frag also lefts some space at the right */
+ newfrag2 = new_fragment(NULL, newfrag->ofs +
+ newfrag->size, hole->ofs + hole->size
+ - newfrag->ofs - newfrag->size);
+ if (unlikely(!newfrag2)) {
+ jffs2_free_node_frag(newfrag);
+ return -ENOMEM;
}
+ }
- tn = jffs2_alloc_tmp_dnode_info();
- if (!tn) {
- D1(printk(KERN_DEBUG "alloc tn failed\n"));
- err = -ENOMEM;
- goto free_out;
+ hole->size = newfrag->ofs - hole->ofs;
+ dbg_fragtree2("left the hole %#04x-%#04x at the left and inserd fragment %#04x-%#04x\n",
+ hole->ofs, hole->ofs + hole->size, newfrag->ofs, newfrag->ofs + newfrag->size);
+
+ jffs2_fragtree_insert(newfrag, hole);
+ rb_insert_color(&newfrag->rb, root);
+
+ if (newfrag2) {
+ dbg_fragtree2("left the hole %#04x-%#04x at the right\n",
+ newfrag2->ofs, newfrag2->ofs + newfrag2->size);
+ jffs2_fragtree_insert(newfrag2, newfrag);
+ rb_insert_color(&newfrag2->rb, root);
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * This function is used when we build inode. It expects the nodes are passed
+ * in the decreasing version order. The whole point of this is to improve the
+ * inodes checking on NAND: we check the nodes' data CRC only when they are not
+ * obsoleted. Previously, add_frag_to_fragtree() function was used and
+ * nodes were passed to it in the increasing version ordes and CRCs of all
+ * nodes were checked.
+ *
+ * Note: tn->fn->size shouldn't be zero.
+ *
+ * Returns 0 if the node was inserted
+ * 1 if it wasn't inserted (since it is obsolete)
+ * < 0 an if error occured
+ */
+int jffs2_add_older_frag_to_fragtree(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
+ struct jffs2_tmp_dnode_info *tn)
+{
+ struct jffs2_node_frag *this, *newfrag;
+ uint32_t lastend;
+ struct jffs2_full_dnode *fn = tn->fn;
+ struct rb_root *root = &f->fragtree;
+ uint32_t fn_size = fn->size, fn_ofs = fn->ofs;
+ int err, checked = 0;
+ int ref_flag;
+
+ dbg_fragtree("insert fragment %#04x-%#04x, ver %u\n", fn_ofs, fn_ofs + fn_size, tn->version);
+
+ /* Skip all the nodes which are completed before this one starts */
+ this = jffs2_lookup_node_frag(root, fn_ofs);
+ if (this)
+ dbg_fragtree2("'this' found %#04x-%#04x (%s)\n", this->ofs, this->ofs + this->size, this->node ? "data" : "hole");
+
+ if (this)
+ lastend = this->ofs + this->size;
+ else
+ lastend = 0;
+
+ /* Detect the preliminary type of node */
+ if (fn->size >= PAGE_CACHE_SIZE)
+ ref_flag = REF_PRISTINE;
+ else
+ ref_flag = REF_NORMAL;
+
+ /* See if we ran off the end of the root */
+ if (lastend <= fn_ofs) {
+ /* We did */
+
+ /*
+ * We are going to insert the new node into the
+ * fragment tree, so check it.
+ */
+ err = check_node(c, f, tn);
+ if (err != 0)
+ return err;
+
+ fn->frags = 1;
+
+ newfrag = new_fragment(fn, fn_ofs, fn_size);
+ if (unlikely(!newfrag))
+ return -ENOMEM;
+
+ err = no_overlapping_node(c, root, newfrag, this, lastend);
+ if (unlikely(err != 0)) {
+ jffs2_free_node_frag(newfrag);
+ return err;
+ }
+
+ goto out_ok;
+ }
+
+ fn->frags = 0;
+
+ while (1) {
+ /*
+ * Here we have:
+ * fn_ofs < this->ofs + this->size && fn_ofs >= this->ofs.
+ *
+ * Remember, 'this' has higher version, any non-hole node
+ * which is already in the fragtree is newer then the newly
+ * inserted.
+ */
+ if (!this->node) {
+ /*
+ * 'this' is the hole fragment, so at least the
+ * beginning of the new fragment is valid.
+ */
+
+ /*
+ * We are going to insert the new node into the
+ * fragment tree, so check it.
+ */
+ if (!checked) {
+ err = check_node(c, f, tn);
+ if (unlikely(err != 0))
+ return err;
+ checked = 1;
}
- 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;
+ if (this->ofs + this->size >= fn_ofs + fn_size) {
+ /* We split the hole on two parts */
+
+ fn->frags += 1;
+ newfrag = new_fragment(fn, fn_ofs, fn_size);
+ if (unlikely(!newfrag))
+ return -ENOMEM;
+
+ err = split_hole(c, root, newfrag, this);
+ if (unlikely(err))
+ return err;
+ goto out_ok;
}
- 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);
+
+ /*
+ * The beginning of the new fragment is valid since it
+ * overlaps the hole node.
+ */
+
+ ref_flag = REF_NORMAL;
+
+ fn->frags += 1;
+ newfrag = new_fragment(fn, fn_ofs,
+ this->ofs + this->size - fn_ofs);
+ if (unlikely(!newfrag))
+ return -ENOMEM;
+
+ if (fn_ofs == this->ofs) {
+ /*
+ * The new node starts at the same offset as
+ * the hole and supersieds the hole.
+ */
+ dbg_fragtree2("add the new fragment instead of hole %#04x-%#04x, refcnt %d\n",
+ fn_ofs, fn_ofs + this->ofs + this->size - fn_ofs, fn->frags);
+
+ rb_replace_node(&this->rb, &newfrag->rb, root);
+ jffs2_free_node_frag(this);
+ } else {
+ /*
+ * The hole becomes shorter as its right part
+ * is supersieded by the new fragment.
+ */
+ dbg_fragtree2("reduce size of hole %#04x-%#04x to %#04x-%#04x\n",
+ this->ofs, this->ofs + this->size, this->ofs, this->ofs + this->size - newfrag->size);
+
+ dbg_fragtree2("add new fragment %#04x-%#04x, refcnt %d\n", fn_ofs,
+ fn_ofs + this->ofs + this->size - fn_ofs, fn->frags);
+
+ this->size -= newfrag->size;
+ jffs2_fragtree_insert(newfrag, this);
+ rb_insert_color(&newfrag->rb, root);
}
- 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;
+
+ fn_ofs += newfrag->size;
+ fn_size -= newfrag->size;
+ this = rb_entry(rb_next(&newfrag->rb),
+ struct jffs2_node_frag, rb);
+
+ dbg_fragtree2("switch to the next 'this' fragment: %#04x-%#04x %s\n",
+ this->ofs, this->ofs + this->size, this->node ? "(data)" : "(hole)");
+ }
+
+ /*
+ * 'This' node is not the hole so it obsoletes the new fragment
+ * either fully or partially.
+ */
+ if (this->ofs + this->size >= fn_ofs + fn_size) {
+ /* The new node is obsolete, drop it */
+ if (fn->frags == 0) {
+ dbg_fragtree2("%#04x-%#04x is obsolete, mark it obsolete\n", fn_ofs, fn_ofs + fn_size);
+ ref_flag = REF_OBSOLETE;
}
+ goto out_ok;
+ } else {
+ struct jffs2_node_frag *new_this;
+
+ /* 'This' node obsoletes the beginning of the new node */
+ dbg_fragtree2("the beginning %#04x-%#04x is obsolete\n", fn_ofs, this->ofs + this->size);
+
+ ref_flag = REF_NORMAL;
+
+ fn_size -= this->ofs + this->size - fn_ofs;
+ fn_ofs = this->ofs + this->size;
+ dbg_fragtree2("now considering %#04x-%#04x\n", fn_ofs, fn_ofs + fn_size);
+
+ new_this = rb_entry(rb_next(&this->rb), struct jffs2_node_frag, rb);
+ if (!new_this) {
+ /*
+ * There is no next fragment. Add the rest of
+ * the new node as the right-hand child.
+ */
+ if (!checked) {
+ err = check_node(c, f, tn);
+ if (unlikely(err != 0))
+ return err;
+ checked = 1;
+ }
+ fn->frags += 1;
+ newfrag = new_fragment(fn, fn_ofs, fn_size);
+ if (unlikely(!newfrag))
+ return -ENOMEM;
+
+ dbg_fragtree2("there are no more fragments, insert %#04x-%#04x\n",
+ newfrag->ofs, newfrag->ofs + newfrag->size);
+ rb_link_node(&newfrag->rb, &this->rb, &this->rb.rb_right);
+ rb_insert_color(&newfrag->rb, root);
+ goto out_ok;
+ } else {
+ this = new_this;
+ dbg_fragtree2("switch to the next 'this' fragment: %#04x-%#04x %s\n",
+ this->ofs, this->ofs + this->size, this->node ? "(data)" : "(hole)");
+ }
}
- spin_lock(&c->erase_completion_lock);
+ }
+out_ok:
+ BUG_ON(fn->size < PAGE_CACHE_SIZE && ref_flag == REF_PRISTINE);
+
+ if (ref_flag == REF_OBSOLETE) {
+ dbg_fragtree2("the node is obsolete now\n");
+ /* jffs2_mark_node_obsolete() will adjust space accounting */
+ jffs2_mark_node_obsolete(c, fn->raw);
+ return 1;
}
+
+ dbg_fragtree2("the node is \"%s\" now\n", ref_flag == REF_NORMAL ? "REF_NORMAL" : "REF_PRISTINE");
+
+ /* Space accounting was adjusted at check_node_data() */
+ spin_lock(&c->erase_completion_lock);
+ fn->raw->flash_offset = ref_offset(fn->raw) | ref_flag;
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)
/* 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
+ 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);
-
+ if (!new->ino)
+ new->ino = ++c->highest_ino;
+
+ dbg_inocache("add %p (ino #%u)\n", new, new->ino);
+
prev = &c->inocache_list[new->ino % INOCACHE_HASHSIZE];
while ((*prev) && (*prev)->ino < new->ino) {
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));
+
+ dbg_inocache("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;
}
*prev = old->next;
}
+ /* Free it now unless it's in READING or CLEARING state, which
+ are the transitions upon read_inode() and clear_inode(). The
+ rest of the time we know nobody else is looking at it, and
+ if it's held by read_inode() or clear_inode() they'll free it
+ for themselves. */
+ if (old->state != INO_STATE_READING && old->state != INO_STATE_CLEARING)
+ jffs2_free_inode_cache(old);
+
spin_unlock(&c->inocache_lock);
}
{
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->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
+ /* 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));
+ dbg_fragtree2("root %p, offset %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;
}
}
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"));
-
+ dbg_fragtree2("no match. Returning frag %#04x-%#04x, closest previous\n",
+ prev->ofs, prev->ofs+prev->size);
+ else
+ dbg_fragtree2("returning NULL, empty fragtree\n");
+
return prev;
}
if (!root->rb_node)
return;
- frag = (rb_entry(root->rb_node, struct jffs2_node_frag, rb));
+ dbg_fragtree("killing\n");
+ 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
+ /* 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
+ else
parent->rb.rb_right = NULL;
}
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);
-}
git://git.onelab.eu / linux-2.6.git / blobdiff