aboutsummaryrefslogtreecommitdiff
path: root/fs/jffs2
diff options
context:
space:
mode:
Diffstat (limited to 'fs/jffs2')
-rw-r--r--fs/jffs2/nodelist.c460
-rw-r--r--fs/jffs2/nodelist.h25
-rw-r--r--fs/jffs2/readinode.c732
3 files changed, 618 insertions, 599 deletions
diff --git a/fs/jffs2/nodelist.c b/fs/jffs2/nodelist.c
index 5a6b4d64206..fecffbc6355 100644
--- a/fs/jffs2/nodelist.c
+++ b/fs/jffs2/nodelist.c
@@ -397,466 +397,6 @@ int jffs2_add_full_dnode_to_inode(struct jffs2_sb_info *c, struct jffs2_inode_in
return 0;
}
-/*
- * 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 = tn->fn->raw;
- int err = 0, pointed = 0;
- struct jffs2_eraseblock *jeb;
- unsigned char *buffer;
- uint32_t crc, ofs, len;
- size_t retlen;
-
- BUG_ON(tn->csize == 0);
-
- if (!jffs2_is_writebuffered(c))
- goto adj_acc;
-
- /* 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 (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;
- }
-
- ofs += len;
- len = tn->csize - len;
-
- 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
-
- 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) {
- JFFS2_ERROR("can not read %d bytes from 0x%08x, error code: %d.\n", len, ofs, err);
- goto free_out;
- }
-
- if (retlen != len) {
- JFFS2_ERROR("short read at %#08x: %zd instead of %d.\n", ofs, retlen, len);
- err = -EIO;
- goto free_out;
- }
- }
-
- /* 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 (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;
- }
-
-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, buffer, ofs, len);
-#endif
- return err;
-}
-
-/*
- * 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;
-
- 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;
- }
- }
-
- 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;
- }
-
- 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;
- }
-
- /*
- * 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);
- }
-
- 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)");
- }
- }
- }
-
-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);
-
- return 0;
-}
-
void jffs2_set_inocache_state(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic, int state)
{
spin_lock(&c->inocache_lock);
diff --git a/fs/jffs2/nodelist.h b/fs/jffs2/nodelist.h
index 382662cc61e..e5c8f2be8e2 100644
--- a/fs/jffs2/nodelist.h
+++ b/fs/jffs2/nodelist.h
@@ -225,7 +225,20 @@ struct jffs2_tmp_dnode_info
uint32_t version;
uint32_t data_crc;
uint32_t partial_crc;
- uint32_t csize;
+ uint16_t csize;
+ uint16_t overlapped;
+};
+
+/* Temporary data structure used during readinode. */
+struct jffs2_readinode_info
+{
+ struct rb_root tn_root;
+ struct jffs2_tmp_dnode_info *mdata_tn;
+ uint32_t highest_version;
+ uint32_t latest_mctime;
+ uint32_t mctime_ver;
+ struct jffs2_full_dirent *fds;
+ struct jffs2_raw_node_ref *latest_ref;
};
struct jffs2_full_dirent
@@ -328,6 +341,15 @@ static inline struct jffs2_node_frag *frag_last(struct rb_root *root)
#define frag_right(frag) rb_entry((frag)->rb.rb_right, struct jffs2_node_frag, rb)
#define frag_erase(frag, list) rb_erase(&frag->rb, list);
+#define tn_next(tn) rb_entry(rb_next(&(tn)->rb), struct jffs2_tmp_dnode_info, rb)
+#define tn_prev(tn) rb_entry(rb_prev(&(tn)->rb), struct jffs2_tmp_dnode_info, rb)
+#define tn_parent(tn) rb_entry(rb_parent(&(tn)->rb), struct jffs2_tmp_dnode_info, rb)
+#define tn_left(tn) rb_entry((tn)->rb.rb_left, struct jffs2_tmp_dnode_info, rb)
+#define tn_right(tn) rb_entry((tn)->rb.rb_right, struct jffs2_tmp_dnode_info, rb)
+#define tn_erase(tn, list) rb_erase(&tn->rb, list);
+#define tn_last(list) rb_entry(rb_last(list), struct jffs2_tmp_dnode_info, rb)
+#define tn_first(list) rb_entry(rb_first(list), struct jffs2_tmp_dnode_info, rb)
+
/* nodelist.c */
void jffs2_add_fd_to_list(struct jffs2_sb_info *c, struct jffs2_full_dirent *new, struct jffs2_full_dirent **list);
void jffs2_set_inocache_state(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic, int state);
@@ -343,7 +365,6 @@ struct rb_node *rb_prev(struct rb_node *);
void rb_replace_node(struct rb_node *victim, struct rb_node *new, struct rb_root *root);
int jffs2_add_full_dnode_to_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_full_dnode *fn);
void jffs2_truncate_fragtree (struct jffs2_sb_info *c, struct rb_root *list, uint32_t size);
-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_raw_node_ref *jffs2_link_node_ref(struct jffs2_sb_info *c,
struct jffs2_eraseblock *jeb,
uint32_t ofs, uint32_t len,
diff --git a/fs/jffs2/readinode.c b/fs/jffs2/readinode.c
index 1298848336b..49d4b0a67c5 100644
--- a/fs/jffs2/readinode.c
+++ b/fs/jffs2/readinode.c
@@ -22,30 +22,510 @@
#include "nodelist.h"
/*
- * Put a new tmp_dnode_info into the temporaty RB-tree, keeping the list in
- * order of increasing version.
+ * 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 void jffs2_add_tn_to_tree(struct jffs2_tmp_dnode_info *tn, struct rb_root *list)
+static int check_node_data(struct jffs2_sb_info *c, struct jffs2_tmp_dnode_info *tn)
{
- struct rb_node **p = &list->rb_node;
- struct rb_node * parent = NULL;
- struct jffs2_tmp_dnode_info *this;
-
- while (*p) {
- parent = *p;
- this = rb_entry(parent, struct jffs2_tmp_dnode_info, rb);
-
- /* There may actually be a collision here, but it doesn't
- actually matter. As long as the two nodes with the same
- version are together, it's all fine. */
- if (tn->version > this->version)
- p = &(*p)->rb_left;
+ 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;
+
+ BUG_ON(tn->csize == 0);
+
+ if (!jffs2_is_writebuffered(c))
+ goto adj_acc;
+
+ /* 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 (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;
+ }
+
+ ofs += len;
+ len = tn->csize - len;
+
+ 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
- p = &(*p)->rb_right;
+ pointed = 1; /* succefully pointed to device */
+ }
+#endif
+
+ 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) {
+ JFFS2_ERROR("can not read %d bytes from 0x%08x, error code: %d.\n", len, ofs, err);
+ goto free_out;
+ }
+
+ if (retlen != len) {
+ JFFS2_ERROR("short read at %#08x: %zd instead of %d.\n", ofs, retlen, len);
+ err = -EIO;
+ goto free_out;
+ }
+ }
+
+ /* 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 (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;
}
- rb_link_node(&tn->rb, parent, p);
- rb_insert_color(&tn->rb, list);
+adj_acc:
+ jeb = &c->blocks[ref->flash_offset / c->sector_size];
+ len = ref_totlen(c, jeb, ref);
+ /* If it should be REF_NORMAL, it'll get marked as such when
+ we build the fragtree, shortly. No need to worry about GC
+ moving it while it's marked REF_PRISTINE -- GC won't happen
+ till we've finished checking every inode anyway. */
+ ref->flash_offset |= REF_PRISTINE;
+ /*
+ * 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;
+ jffs2_dbg_acct_paranoia_check_nolock(c, jeb);
+ spin_unlock(&c->erase_completion_lock);
+
+ return 0;
+
+free_out:
+ if(!pointed)
+ kfree(buffer);
+#ifndef __ECOS
+ else
+ c->mtd->unpoint(c->mtd, buffer, ofs, len);
+#endif
+ return err;
+}
+
+/*
+ * Helper function for jffs2_add_older_frag_to_fragtree().
+ *
+ * Checks the node if we are in the checking stage.
+ */
+static int check_tn_node(struct jffs2_sb_info *c, struct jffs2_tmp_dnode_info *tn)
+{
+ int ret;
+
+ 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_readinode("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_readinode("CRC error, mark it obsolete.\n");
+ jffs2_mark_node_obsolete(c, tn->fn->raw);
+ }
+
+ return ret;
+}
+
+static struct jffs2_tmp_dnode_info *jffs2_lookup_tn(struct rb_root *tn_root, uint32_t offset)
+{
+ struct rb_node *next;
+ struct jffs2_tmp_dnode_info *tn = NULL;
+
+ dbg_readinode("root %p, offset %d\n", tn_root, offset);
+
+ next = tn_root->rb_node;
+
+ while (next) {
+ tn = rb_entry(next, struct jffs2_tmp_dnode_info, rb);
+
+ if (tn->fn->ofs < offset)
+ next = tn->rb.rb_right;
+ else if (tn->fn->ofs >= offset)
+ next = tn->rb.rb_left;
+ else
+ break;
+ }
+
+ return tn;
+}
+
+
+static void jffs2_kill_tn(struct jffs2_sb_info *c, struct jffs2_tmp_dnode_info *tn)
+{
+ jffs2_mark_node_obsolete(c, tn->fn->raw);
+ jffs2_free_full_dnode(tn->fn);
+ jffs2_free_tmp_dnode_info(tn);
+}
+/*
+ * This function is used when we read an inode. Data nodes arrive in
+ * arbitrary order -- they may be older or newer than the nodes which
+ * are already in the tree. Where overlaps occur, the older node can
+ * be discarded as long as the newer passes the CRC check. We don't
+ * bother to keep track of holes in this rbtree, and neither do we deal
+ * with frags -- we can have multiple entries starting at the same
+ * offset, and the one with the smallest length will come first in the
+ * ordering.
+ *
+ * Returns 0 if the node was inserted
+ * 1 if the node is obsolete (because we can't mark it so yet)
+ * < 0 an if error occurred
+ */
+static int jffs2_add_tn_to_tree(struct jffs2_sb_info *c,
+ struct jffs2_readinode_info *rii,
+ struct jffs2_tmp_dnode_info *tn)
+{
+ uint32_t fn_end = tn->fn->ofs + tn->fn->size;
+ struct jffs2_tmp_dnode_info *insert_point = NULL, *this;
+
+ dbg_readinode("insert fragment %#04x-%#04x, ver %u\n", tn->fn->ofs, fn_end, tn->version);
+
+ /* If a node has zero dsize, we only have to keep if it if it might be the
+ node with highest version -- i.e. the one which will end up as f->metadata.
+ Note that such nodes won't be REF_UNCHECKED since there are no data to
+ check anyway. */
+ if (!tn->fn->size) {
+ if (rii->mdata_tn) {
+ /* We had a candidate mdata node already */
+ dbg_readinode("kill old mdata with ver %d\n", rii->mdata_tn->version);
+ jffs2_kill_tn(c, rii->mdata_tn);
+ }
+ rii->mdata_tn = tn;
+ dbg_readinode("keep new mdata with ver %d\n", tn->version);
+ return 0;
+ }
+
+ /* Find the earliest node which _may_ be relevant to this one */
+ this = jffs2_lookup_tn(&rii->tn_root, tn->fn->ofs);
+ if (!this) {
+ /* First addition to empty tree. $DEITY how I love the easy cases */
+ rb_link_node(&tn->rb, NULL, &rii->tn_root.rb_node);
+ rb_insert_color(&tn->rb, &rii->tn_root);
+ dbg_readinode("keep new frag\n");
+ return 0;
+ }
+
+ /* If we add a new node it'll be somewhere under here. */
+ insert_point = this;
+
+ /* If the node is coincident with another at a lower address,
+ back up until the other node is found. It may be relevant */
+ while (tn->overlapped)
+ tn = tn_prev(tn);
+
+ dbg_readinode("'this' found %#04x-%#04x (%s)\n", this->fn->ofs, this->fn->ofs + this->fn->size, this->fn ? "data" : "hole");
+
+ while (this) {
+ if (this->fn->ofs > fn_end)
+ break;
+ dbg_readinode("Ponder this ver %d, 0x%x-0x%x\n",
+ this->version, this->fn->ofs, this->fn->size);
+
+ if (this->version == tn->version) {
+ /* Version number collision means REF_PRISTINE GC. Accept either of them
+ as long as the CRC is correct. Check the one we have already... */
+ if (!check_tn_node(c, this)) {
+ /* The one we already had was OK. Keep it and throw away the new one */
+ dbg_readinode("Like old node. Throw away new\n");
+ jffs2_kill_tn(c, tn);
+ return 0;
+ } else {
+ /* Who cares if the new one is good; keep it for now anyway. */
+ rb_replace_node(&this->rb, &tn->rb, &rii->tn_root);
+ /* Same overlapping from in front and behind */
+ tn->overlapped = this->overlapped;
+ jffs2_kill_tn(c, this);
+ dbg_readinode("Like new node. Throw away old\n");
+ return 0;
+ }
+ }
+ if (this->version < tn->version &&
+ this->fn->ofs >= tn->fn->ofs &&
+ this->fn->ofs + this->fn->size <= fn_end) {
+ /* New node entirely overlaps 'this' */
+ if (check_tn_node(c, tn)) {
+ dbg_readinode("new node bad CRC\n");
+ jffs2_kill_tn(c, tn);
+ return 0;
+ }
+ /* ... and is good. Kill 'this'... */
+ rb_replace_node(&this->rb, &tn->rb, &rii->tn_root);
+ tn->overlapped = this->overlapped;
+ jffs2_kill_tn(c, this);
+ /* ... and any subsequent nodes which are also overlapped */
+ this = tn_next(tn);
+ while (this && this->fn->ofs + this->fn->size < fn_end) {
+ struct jffs2_tmp_dnode_info *next = tn_next(this);
+ if (this->version < tn->version) {
+ tn_erase(this, &rii->tn_root);
+ dbg_readinode("Kill overlapped ver %d, 0x%x-0x%x\n",
+ this->version, this->fn->ofs,
+ this->fn->ofs+this->fn->size);
+ jffs2_kill_tn(c, this);
+ }
+ this = next;
+ }
+ dbg_readinode("Done inserting new\n");
+ return 0;
+ }
+ if (this->version > tn->version &&
+ this->fn->ofs <= tn->fn->ofs &&
+ this->fn->ofs+this->fn->size >= fn_end) {
+ /* New node entirely overlapped by 'this' */
+ if (!check_tn_node(c, this)) {
+ dbg_readinode("Good CRC on old node. Kill new\n");
+ jffs2_kill_tn(c, tn);
+ return 0;
+ }
+ /* ... but 'this' was bad. Replace it... */
+ rb_replace_node(&this->rb, &tn->rb, &rii->tn_root);
+ dbg_readinode("Bad CRC on old overlapping node. Kill it\n");
+ jffs2_kill_tn(c, this);
+ return 0;
+ }
+ /* We want to be inserted under the last node which is
+ either at a lower offset _or_ has a smaller range */
+ if (this->fn->ofs < tn->fn->ofs ||
+ (this->fn->ofs == tn->fn->ofs &&
+ this->fn->size <= tn->fn->size))
+ insert_point = this;
+
+ this = tn_next(this);
+ }
+ dbg_readinode("insert_point %p, ver %d, 0x%x-0x%x, ov %d\n",
+ insert_point, insert_point->version, insert_point->fn->ofs,
+ insert_point->fn->ofs+insert_point->fn->size,
+ insert_point->overlapped);
+ /* We neither completely obsoleted nor were completely
+ obsoleted by an earlier node. Insert under insert_point */
+ {
+ struct rb_node *parent = &insert_point->rb;
+ struct rb_node **link = &parent;
+
+ while (*link) {
+ parent = *link;
+ insert_point = rb_entry(parent, struct jffs2_tmp_dnode_info, rb);
+ if (tn->fn->ofs > insert_point->fn->ofs)
+ link = &insert_point->rb.rb_right;
+ else if (tn->fn->ofs < insert_point->fn->ofs ||
+ tn->fn->size < insert_point->fn->size)
+ link = &insert_point->rb.rb_left;
+ else
+ link = &insert_point->rb.rb_right;
+ }
+ rb_link_node(&tn->rb, &insert_point->rb, link);
+ rb_insert_color(&tn->rb, &rii->tn_root);
+ }
+ /* If there's anything behind that overlaps us, note it */
+ this = tn_prev(tn);
+ if (this) {
+ while (1) {
+ if (this->fn->ofs + this->fn->size > tn->fn->ofs) {
+ dbg_readinode("Node is overlapped by %p (v %d, 0x%x-0x%x)\n",
+ this, this->version, this->fn->ofs,
+ this->fn->ofs+this->fn->size);
+ tn->overlapped = 1;
+ break;
+ }
+ if (!this->overlapped)
+ break;
+ this = tn_prev(this);
+ }
+ }
+
+ /* If the new node overlaps anything ahead, note it */
+ this = tn_next(tn);
+ while (this && this->fn->ofs < fn_end) {
+ this->overlapped = 1;
+ dbg_readinode("Node ver %d, 0x%x-0x%x is overlapped\n",
+ this->version, this->fn->ofs,
+ this->fn->ofs+this->fn->size);
+ this = tn_next(this);
+ }
+ return 0;
+}
+
+/* Trivial function to remove the last node in the tree. Which by definition
+ has no right-hand -- so can be removed just by making its only child (if
+ any) take its place under its parent. */
+static void eat_last(struct rb_root *root, struct rb_node *node)
+{
+ struct rb_node *parent = rb_parent(node);
+ struct rb_node **link;
+
+ /* LAST! */
+ BUG_ON(node->rb_right);
+
+ if (!parent)
+ link = &root->rb_node;
+ else if (node == parent->rb_left)
+ link = &parent->rb_left;
+ else
+ link = &parent->rb_right;
+
+ *link = node->rb_left;
+ /* Colour doesn't matter now. Only the parent pointer. */
+ if (node->rb_left)
+ node->rb_left->rb_parent_color = node->rb_parent_color;
+}
+
+/* We put this in reverse order, so we can just use eat_last */
+static void ver_insert(struct rb_root *ver_root, struct jffs2_tmp_dnode_info *tn)
+{
+ struct rb_node **link = &ver_root->rb_node;
+ struct rb_node *parent = NULL;
+ struct jffs2_tmp_dnode_info *this_tn;
+
+ while (*link) {
+ parent = *link;
+ this_tn = rb_entry(parent, struct jffs2_tmp_dnode_info, rb);
+
+ if (tn->version > this_tn->version)
+ link = &parent->rb_left;
+ else
+ link = &parent->rb_right;
+ }
+ dbg_readinode("Link new node at %p (root is %p)\n", link, ver_root);
+ rb_link_node(&tn->rb, parent, link);
+ rb_insert_color(&tn->rb, ver_root);
+}
+
+/* Build final, normal fragtree from tn tree. It doesn't matter which order
+ we add nodes to the real fragtree, as long as they don't overlap. And
+ having thrown away the majority of overlapped nodes as we went, there
+ really shouldn't be many sets of nodes which do overlap. If we start at
+ the end, we can use the overlap markers -- we can just eat nodes which
+ aren't overlapped, and when we encounter nodes which _do_ overlap we
+ sort them all into a temporary tree in version order before replaying them. */
+static int jffs2_build_inode_fragtree(struct jffs2_sb_info *c,
+ struct jffs2_inode_info *f,
+ struct jffs2_readinode_info *rii)
+{
+ struct jffs2_tmp_dnode_info *pen, *last, *this;
+ struct rb_root ver_root = RB_ROOT;
+ uint32_t high_ver = 0;
+
+ if (rii->mdata_tn) {
+ dbg_readinode("potential mdata is ver %d at %p\n", rii->mdata_tn->version, rii->mdata_tn);
+ high_ver = rii->mdata_tn->version;
+ rii->latest_ref = rii->mdata_tn->fn->raw;
+ }
+#ifdef JFFS2_DBG_READINODE_MESSAGES
+ this = tn_last(&rii->tn_root);
+ while (this) {
+ dbg_readinode("tn %p ver %d range 0x%x-0x%x ov %d\n", this, this->version, this->fn->ofs,
+ this->fn->ofs+this->fn->size, this->overlapped);
+ this = tn_prev(this);
+ }
+#endif
+ pen = tn_last(&rii->tn_root);
+ while ((last = pen)) {
+ pen = tn_prev(last);
+
+ eat_last(&rii->tn_root, &last->rb);
+ ver_insert(&ver_root, last);
+
+ if (unlikely(last->overlapped))
+ continue;
+
+ /* Now we have a bunch of nodes in reverse version
+ order, in the tree at ver_root. Most of the time,
+ there'll actually be only one node in the 'tree',
+ in fact. */
+ this = tn_last(&ver_root);
+
+ while (this) {
+ struct jffs2_tmp_dnode_info *vers_next;
+ int ret;
+ vers_next = tn_prev(this);
+ eat_last(&ver_root, &this->rb);
+ if (check_tn_node(c, this)) {
+ dbg_readinode("node ver %x, 0x%x-0x%x failed CRC\n",
+ this->version, this->fn->ofs,
+ this->fn->ofs+this->fn->size);
+ jffs2_kill_tn(c, this);
+ } else {
+ if (this->version > high_ver) {
+ /* Note that this is different from the other
+ highest_version, because this one is only
+ counting _valid_ nodes which could give the
+ latest inode metadata */
+ high_ver = this->version;
+ rii->latest_ref = this->fn->raw;
+ }
+ dbg_readinode("Add %p (v %x, 0x%x-0x%x, ov %d) to fragtree\n",
+ this, this->version, this->fn->ofs,
+ this->fn->ofs+this->fn->size, this->overlapped);
+
+ ret = jffs2_add_full_dnode_to_inode(c, f, this->fn);
+ if (ret) {
+ /* Free the nodes in vers_root; let the caller
+ deal with the rest */
+ JFFS2_ERROR("Add node to tree failed %d\n", ret);
+ while (1) {
+ vers_next = tn_prev(this);
+ if (check_tn_node(c, this))
+ jffs2_mark_node_obsolete(c, this->fn->raw);
+ jffs2_free_full_dnode(this->fn);
+ jffs2_free_tmp_dnode_info(this);
+ this = vers_next;
+ if (!this)
+ break;
+ eat_last(&ver_root, &vers_next->rb);
+ }
+ return ret;
+ }
+ jffs2_free_tmp_dnode_info(this);
+ }
+ this = vers_next;
+ }
+ }
+ return 0;
}
static void jffs2_free_tmp_dnode_info_list(struct rb_root *list)
@@ -112,8 +592,8 @@ static struct jffs2_raw_node_ref *jffs2_first_valid_node(struct jffs2_raw_node_r
* 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, size_t read, struct jffs2_full_dirent **fdp,
- uint32_t *latest_mctime, uint32_t *mctime_ver)
+ struct jffs2_raw_dirent *rd, size_t read,
+ struct jffs2_readinode_info *rii)
{
struct jffs2_full_dirent *fd;
uint32_t crc;
@@ -125,7 +605,8 @@ static inline int read_direntry(struct jffs2_sb_info *c, struct jffs2_raw_node_r
if (unlikely(crc != je32_to_cpu(rd->node_crc))) {
JFFS2_NOTICE("header CRC failed on dirent node at %#08x: read %#08x, calculated %#08x\n",
ref_offset(ref), je32_to_cpu(rd->node_crc), crc);
- return 1;
+ jffs2_mark_node_obsolete(c, ref);
+ return 0;
}
/* If we've never checked the CRCs on this node, check them now */
@@ -137,7 +618,8 @@ static inline int read_direntry(struct jffs2_sb_info *c, struct jffs2_raw_node_r
if (unlikely(PAD((rd->nsize + sizeof(*rd))) != PAD(je32_to_cpu(rd->totlen)))) {
JFFS2_ERROR("illegal nsize in node at %#08x: nsize %#02x, totlen %#04x\n",
ref_offset(ref), rd->nsize, je32_to_cpu(rd->totlen));
- return 1;
+ jffs2_mark_node_obsolete(c, ref);
+ return 0;
}
jeb = &c->blocks[ref->flash_offset / c->sector_size];
@@ -161,10 +643,13 @@ static inline int read_direntry(struct jffs2_sb_info *c, struct jffs2_raw_node_r
fd->ino = je32_to_cpu(rd->ino);
fd->type = rd->type;
+ if (fd->version > rii->highest_version)
+ rii->highest_version = fd->version;
+
/* Pick out the mctime of the latest dirent */
- if(fd->version > *mctime_ver && je32_to_cpu(rd->mctime)) {
- *mctime_ver = fd->version;
- *latest_mctime = je32_to_cpu(rd->mctime);
+ if(fd->version > rii->mctime_ver && je32_to_cpu(rd->mctime)) {
+ rii->mctime_ver = fd->version;
+ rii->latest_mctime = je32_to_cpu(rd->mctime);
}
/*
@@ -201,7 +686,7 @@ static inline int read_direntry(struct jffs2_sb_info *c, struct jffs2_raw_node_r
* Wheee. We now have a complete jffs2_full_dirent structure, with
* the name in it and everything. Link it into the list
*/
- jffs2_add_fd_to_list(c, fd, fdp);
+ jffs2_add_fd_to_list(c, fd, &rii->fds);
return 0;
}
@@ -210,13 +695,13 @@ static inline int read_direntry(struct jffs2_sb_info *c, struct jffs2_raw_node_r
* Helper function for jffs2_get_inode_nodes().
* It is called every time an inode node is found.
*
- * Returns: 0 on succes;
+ * Returns: 0 on success;
* 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, struct rb_root *tnp, int rdlen,
- uint32_t *latest_mctime, uint32_t *mctime_ver)
+ struct jffs2_raw_inode *rd, int rdlen,
+ struct jffs2_readinode_info *rii)
{
struct jffs2_tmp_dnode_info *tn;
uint32_t len, csize;
@@ -230,7 +715,8 @@ static inline int read_dnode(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
if (unlikely(crc != je32_to_cpu(rd->node_crc))) {
JFFS2_NOTICE("node CRC failed on dnode at %#08x: read %#08x, calculated %#08x\n",
ref_offset(ref), je32_to_cpu(rd->node_crc), crc);
- return 1;
+ jffs2_mark_node_obsolete(c, ref);
+ return 0;
}
tn = jffs2_alloc_tmp_dnode_info();
@@ -342,6 +828,10 @@ static inline int read_dnode(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
tn->data_crc = je32_to_cpu(rd->data_crc);
tn->csize = csize;
tn->fn->raw = ref;
+ tn->overlapped = 0;
+
+ if (tn->version > rii->highest_version)
+ rii->highest_version = tn->version;
/* There was a bug where we wrote hole nodes out with
csize/dsize swapped. Deal with it */
@@ -353,13 +843,25 @@ static inline int read_dnode(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
dbg_readinode("dnode @%08x: ver %u, offset %#04x, dsize %#04x, csize %#04x\n",
ref_offset(ref), je32_to_cpu(rd->version), je32_to_cpu(rd->offset), je32_to_cpu(rd->dsize), csize);
- jffs2_add_tn_to_tree(tn, tnp);
+ ret = jffs2_add_tn_to_tree(c, rii, tn);
+ if (ret) {
+ jffs2_free_full_dnode(tn->fn);
+ free_out:
+ jffs2_free_tmp_dnode_info(tn);
+ return ret;
+ }
+#ifdef JFFS2_DBG_READINODE_MESSAGES
+ dbg_readinode("After adding ver %d:\n", tn->version);
+ tn = tn_first(&rii->tn_root);
+ while (tn) {
+ dbg_readinode("%p: v %d r 0x%x-0x%x ov %d\n",
+ tn, tn->version, tn->fn->ofs,
+ tn->fn->ofs+tn->fn->size, tn->overlapped);
+ tn = tn_next(tn);
+ }
+#endif
return 0;
-
-free_out:
- jffs2_free_tmp_dnode_info(tn);
- return ret;
}
/*
@@ -379,7 +881,8 @@ static inline int read_unknown(struct jffs2_sb_info *c, struct jffs2_raw_node_re
JFFS2_ERROR("Node is {%04x,%04x,%08x,%08x}. Please report this error.\n",
je16_to_cpu(un->magic), je16_to_cpu(un->nodetype),
je32_to_cpu(un->totlen), je32_to_cpu(un->hdr_crc));
- return 1;
+ jffs2_mark_node_obsolete(c, ref);
+ return 0;
}
un->nodetype = cpu_to_je16(JFFS2_NODE_ACCURATE | je16_to_cpu(un->nodetype));
@@ -407,7 +910,8 @@ static inline int read_unknown(struct jffs2_sb_info *c, struct jffs2_raw_node_re
case JFFS2_FEATURE_RWCOMPAT_DELETE:
JFFS2_NOTICE("unknown RWCOMPAT_DELETE nodetype %#04X at %#08x\n",
je16_to_cpu(un->nodetype), ref_offset(ref));
- return 1;
+ jffs2_mark_node_obsolete(c, ref);
+ return 0;
}
return 0;
@@ -457,21 +961,20 @@ static int read_more(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *ref,
}
/* Get tmp_dnode_info and full_dirent for all non-obsolete nodes associated
- with this ino, returning the former in order of version */
+ with this ino. Perform a preliminary ordering on data nodes, throwing away
+ those which are completely obsoleted by newer ones. The naïve approach we
+ use to take of just returning them _all_ in version order will cause us to
+ run out of memory in certain degenerate cases. */
static int jffs2_get_inode_nodes(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
- struct rb_root *tnp, struct jffs2_full_dirent **fdp,
- uint32_t *highest_version, uint32_t *latest_mctime,
- uint32_t *mctime_ver)
+ struct jffs2_readinode_info *rii)
{
struct jffs2_raw_node_ref *ref, *valid_ref;
- struct rb_root ret_tn = RB_ROOT;
- struct jffs2_full_dirent *ret_fd = NULL;
unsigned char *buf = NULL;
union jffs2_node_union *node;
size_t retlen;
int len, err;
- *mctime_ver = 0;
+ rii->mctime_ver = 0;
dbg_readinode("ino #%u\n", f->inocache->ino);
@@ -569,16 +1072,10 @@ static int jffs2_get_inode_nodes(struct jffs2_sb_info *c, struct jffs2_inode_inf
goto free_out;
}
- err = read_direntry(c, ref, &node->d, retlen, &ret_fd, latest_mctime, mctime_ver);
- if (err == 1) {
- jffs2_mark_node_obsolete(c, ref);
- break;
- } else if (unlikely(err))
+ err = read_direntry(c, ref, &node->d, retlen, rii);
+ if (unlikely(err))
goto free_out;
- if (je32_to_cpu(node->d.version) > *highest_version)
- *highest_version = je32_to_cpu(node->d.version);
-
break;
case JFFS2_NODETYPE_INODE:
@@ -589,16 +1086,10 @@ static int jffs2_get_inode_nodes(struct jffs2_sb_info *c, struct jffs2_inode_inf
goto free_out;
}
- err = read_dnode(c, ref, &node->i, &ret_tn, len, latest_mctime, mctime_ver);
- if (err == 1) {
- jffs2_mark_node_obsolete(c, ref);
- break;
- } else if (unlikely(err))
+ err = read_dnode(c, ref, &node->i, len, rii);
+ if (unlikely(err))
goto free_out;
- if (je32_to_cpu(node->i.version) > *highest_version)
- *highest_version = je32_to_cpu(node->i.version);
-
break;
default:
@@ -621,17 +1112,19 @@ static int jffs2_get_inode_nodes(struct jffs2_sb_info *c, struct jffs2_inode_inf
}
spin_unlock(&c->erase_completion_lock);
- *tnp = ret_tn;
- *fdp = ret_fd;
kfree(buf);
+ f->highest_version = rii->highest_version;
+
dbg_readinode("nodes of inode #%u were read, the highest version is %u, latest_mctime %u, mctime_ver %u.\n",
- f->inocache->ino, *highest_version, *latest_mctime, *mctime_ver);
+ f->inocache->ino, rii->highest_version, rii->latest_mctime,
+ rii->mctime_ver);
return 0;
free_out:
- jffs2_free_tmp_dnode_info_list(&ret_tn);
- jffs2_free_full_dirent_list(ret_fd);
+ jffs2_free_tmp_dnode_info_list(&rii->tn_root);
+ jffs2_free_full_dirent_list(rii->fds);
+ rii->fds = NULL;
kfree(buf);
return err;
}
@@ -640,20 +1133,17 @@ static int jffs2_do_read_inode_internal(struct jffs2_sb_info *c,
struct jffs2_inode_info *f,
struct jffs2_raw_inode *latest_node)
{
- struct jffs2_tmp_dnode_info *tn;
- struct rb_root tn_list;
- struct rb_node *rb, *repl_rb;
- struct jffs2_full_dirent *fd_list;
- struct jffs2_full_dnode *fn, *first_fn = NULL;
+ struct jffs2_readinode_info rii;
uint32_t crc;
- uint32_t latest_mctime, mctime_ver;
size_t retlen;
int ret;
dbg_readinode("ino #%u nlink is %d\n", f->inocache->ino, f->inocache->nlink);
+ memset(&rii, 0, sizeof(rii));
+
/* Grab all nodes relevant to this ino */
- ret = jffs2_get_inode_nodes(c, f, &tn_list, &fd_list, &f->highest_version, &latest_mctime, &mctime_ver);
+ ret = jffs2_get_inode_nodes(c, f, &rii);
if (ret) {
JFFS2_ERROR("cannot read nodes for ino %u, returned error is %d\n", f->inocache->ino, ret);
@@ -661,74 +1151,42 @@ static int jffs2_do_read_inode_internal(struct jffs2_sb_info *c,
jffs2_set_inocache_state(c, f->inocache, INO_STATE_CHECKEDABSENT);
return ret;
}
- f->dents = fd_list;
-
- rb = rb_first(&tn_list);
- while (rb) {
- cond_resched();
- tn = rb_entry(rb, struct jffs2_tmp_dnode_info, rb);
- fn = tn->fn;
- ret = 1;
- dbg_readinode("consider node ver %u, phys offset "
- "%#08x(%d), range %u-%u.\n", tn->version,
- ref_offset(fn->raw), ref_flags(fn->raw),
- fn->ofs, fn->ofs + fn->size);
-
- if (fn->size) {
- ret = jffs2_add_older_frag_to_fragtree(c, f, tn);
- /* TODO: the error code isn't checked, check it */
- jffs2_dbg_fragtree_paranoia_check_nolock(f);
- BUG_ON(ret < 0);
- if (!first_fn && ret == 0)
- first_fn = fn;
- } else if (!first_fn) {
- first_fn = fn;
- f->metadata = fn;
- ret = 0; /* Prevent freeing the metadata update node */
- } else
- jffs2_mark_node_obsolete(c, fn->raw);
-
- BUG_ON(rb->rb_left);
- if (rb_parent(rb) && rb_parent(rb)->rb_left == rb) {
- /* We were then left-hand child of our parent. We need
- * to move our own right-hand child into our place. */
- repl_rb = rb->rb_right;
- if (repl_rb)
- rb_set_parent(repl_rb, rb_parent(rb));
- } else
- repl_rb = NULL;
-
- rb = rb_next(rb);
-
- /* Remove the spent tn from the tree; don't bother rebalancing
- * but put our right-hand child in our own place. */
- if (rb_parent(&tn->rb)) {
- if (rb_parent(&tn->rb)->rb_left == &tn->rb)
- rb_parent(&tn->rb)->rb_left = repl_rb;
- else if (rb_parent(&tn->rb)->rb_right == &tn->rb)
- rb_parent(&tn->rb)->rb_right = repl_rb;
- else BUG();
- } else if (tn->rb.rb_right)
- rb_set_parent(tn->rb.rb_right, NULL);
+ ret = jffs2_build_inode_fragtree(c, f, &rii);
+ if (ret) {
+ JFFS2_ERROR("Failed to build final fragtree for inode #%u: error %d\n",
+ f->inocache->ino, ret);
+ if (f->inocache->state == INO_STATE_READING)
+ jffs2_set_inocache_state(c, f->inocache, INO_STATE_CHECKEDABSENT);
+ jffs2_free_tmp_dnode_info_list(&rii.tn_root);
+ /* FIXME: We could at least crc-check them all */
+ if (rii.mdata_tn) {
+ jffs2_free_full_dnode(rii.mdata_tn->fn);
+ jffs2_free_tmp_dnode_info(rii.mdata_tn);
+ rii.mdata_tn = NULL;
+ }
+ return ret;
+ }
- jffs2_free_tmp_dnode_info(tn);
- if (ret) {
- dbg_readinode("delete dnode %u-%u.\n",
- fn->ofs, fn->ofs + fn->size);
- jffs2_free_full_dnode(fn);
+ if (rii.mdata_tn) {
+ if (rii.mdata_tn->fn->raw == rii.latest_ref) {
+ f->metadata = rii.mdata_tn->fn;
+ jffs2_free_tmp_dnode_info(rii.mdata_tn);
+ } else {
+ jffs2_kill_tn(c, rii.mdata_tn);
}
+ rii.mdata_tn = NULL;
}
- jffs2_dbg_fragtree_paranoia_check_nolock(f);
- BUG_ON(first_fn && ref_obsolete(first_fn->raw));
+ f->dents = rii.fds;
+
+ jffs2_dbg_fragtree_paranoia_check_nolock(f);
- fn = first_fn;
- if (unlikely(!first_fn)) {
+ if (unlikely(!rii.latest_ref)) {
/* No data nodes for this inode. */
if (f->inocache->ino != 1) {
JFFS2_WARNING("no data nodes found for ino #%u\n", f->inocache->ino);
- if (!fd_list) {
+ if (!rii.fds) {
if (f->inocache->state == INO_STATE_READING)
jffs2_set_inocache_state(c, f->inocache, INO_STATE_CHECKEDABSENT);
return -EIO;
@@ -746,7 +1204,7 @@ static int jffs2_do_read_inode_internal(struct jffs2_sb_info *c,
return 0;
}
- ret = jffs2_flash_read(c, ref_offset(fn->raw), sizeof(*latest_node), &retlen, (void *)latest_node);
+ ret = jffs2_flash_read(c, ref_offset(rii.latest_ref), sizeof(*latest_node), &retlen, (void *)latest_node);
if (ret || retlen != sizeof(*latest_node)) {
JFFS2_ERROR("failed to read from flash: error %d, %zd of %zd bytes read\n",
ret, retlen, sizeof(*latest_node));
@@ -759,7 +1217,7 @@ static int jffs2_do_read_inode_internal(struct jffs2_sb_info *c,
crc = crc32(0, latest_node, sizeof(*latest_node)-8);
if (crc != je32_to_cpu(latest_node->node_crc)) {
JFFS2_ERROR("CRC failed for read_inode of inode %u at physical location 0x%x\n",
- f->inocache->ino, ref_offset(fn->raw));
+ f->inocache->ino, ref_offset(rii.latest_ref));
up(&f->sem);
jffs2_do_clear_inode(c, f);
return -EIO;
@@ -767,10 +1225,10 @@ static int jffs2_do_read_inode_internal(struct jffs2_sb_info *c,
switch(jemode_to_cpu(latest_node->mode) & S_IFMT) {
case S_IFDIR:
- if (mctime_ver > je32_to_cpu(latest_node->version)) {
+ if (rii.mctime_ver > je32_to_cpu(latest_node->version)) {
/* The times in the latest_node are actually older than
mctime in the latest dirent. Cheat. */
- latest_node->ctime = latest_node->mtime = cpu_to_je32(latest_mctime);
+ latest_node->ctime = latest_node->mtime = cpu_to_je32(rii.latest_mctime);
}
break;
@@ -800,7 +1258,7 @@ static int jffs2_do_read_inode_internal(struct jffs2_sb_info *c,
return -ENOMEM;
}
- ret = jffs2_flash_read(c, ref_offset(fn->raw) + sizeof(*latest_node),
+ ret = jffs2_flash_read(c, ref_offset(rii.latest_ref) + sizeof(*latest_node),
je32_to_cpu(latest_node->csize), &retlen, (char *)f->target);
if (ret || retlen != je32_to_cpu(latest_node->csize)) {
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-13 04:44:09 +0000