mtd/fs/jffs2 nodelist.c,1.98,1.99
Artem Bityuckiy
dedekind at infradead.org
Fri Jul 15 06:13:57 EDT 2005
Update of /home/cvs/mtd/fs/jffs2
In directory phoenix.infradead.org:/tmp/cvs-serv30078
Modified Files:
nodelist.c
Log Message:
[JFFS2] Split a large routine on several smaller.
Index: nodelist.c
===================================================================
RCS file: /home/cvs/mtd/fs/jffs2/nodelist.c,v
retrieving revision 1.98
retrieving revision 1.99
diff -u -r1.98 -r1.99
--- nodelist.c 10 Jul 2005 15:15:32 -0000 1.98
+++ nodelist.c 15 Jul 2005 10:13:54 -0000 1.99
@@ -137,6 +137,307 @@
return NULL;
}
+/*
+ * Helper function for jffs2_get_inode_nodes().
+ * It is called every time an directory entry node is found.
+ *
+ * Returns: 0 on succes;
+ * 1 if the node should be marked obsolete;
+ * negative error code on failure.
+ */
+static inline int
+read_direntry(struct jffs2_sb_info *c,
+ struct jffs2_raw_node_ref *ref,
+ struct jffs2_raw_dirent *rd,
+ uint32_t read,
+ struct jffs2_full_dirent **fdp,
+ int32_t *latest_mctime,
+ uint32_t *mctime_ver)
+{
+ struct jffs2_full_dirent *fd;
+
+ /* The direntry nodes are checked during the flash scanning */
+ BUG_ON(ref_flags(ref) == REF_UNCHECKED);
+ /* Obsoleted. This cannot happen, surely? dwmw2 20020308 */
+ BUG_ON(ref_obsolete(ref));
+
+ /* Sanity check */
+ if (unlikely(PAD((rd->nsize + sizeof(*rd))) != PAD(je32_to_cpu(rd->totlen)))) {
+ printk(KERN_ERR "Error! Illegal nsize in node at %#08x: nsize %#02x, totlen %#04x\n",
+ ref_offset(ref), rd->nsize, je32_to_cpu(rd->totlen));
+ return 1;
+ }
+
+ fd = jffs2_alloc_full_dirent(rd->nsize + 1);
+ if (unlikely(!fd))
+ return -ENOMEM;
+
+ fd->raw = ref;
+ fd->version = je32_to_cpu(rd->version);
+ fd->ino = je32_to_cpu(rd->ino);
+ fd->type = rd->type;
+
+ /* Pick out the mctime of the latest dirent */
+ if(fd->version > *mctime_ver) {
+ *mctime_ver = fd->version;
+ *latest_mctime = je32_to_cpu(rd->mctime);
+ }
+
+ /*
+ * Copy as much of the name as possible from the raw
+ * dirent we've already read from the flash.
+ */
+ if (read > sizeof(*rd))
+ memcpy(&fd->name[0], &rd->name[0],
+ min_t(uint32_t, rd->nsize, (read - sizeof(*rd)) ));
+
+ /* Do we need to copy any more of the name directly from the flash? */
+ if (rd->nsize + sizeof(*rd) > read) {
+ /* FIXME: point() */
+ int err;
+ int already = read - sizeof(*rd);
+
+ err = jffs2_flash_read(c, (ref_offset(ref)) + read,
+ rd->nsize - already, &read, &fd->name[already]);
+ if (unlikely(read != rd->nsize - already) && likely(!err))
+ return -EIO;
+
+ if (unlikely(err)) {
+ printk(KERN_WARNING "Read remainder of name in jffs2_get_inode_nodes(): error %d\n", err);
+ jffs2_free_full_dirent(fd);
+ return -EIO;
+ }
+ }
+
+ fd->nhash = full_name_hash(fd->name, rd->nsize);
+ fd->next = NULL;
+ fd->name[rd->nsize] = '\0';
+
+ /*
+ * Wheee. We now have a complete jffs2_full_dirent structure, with
+ * the name in it and everything. Link it into the list
+ */
+ D1(printk(KERN_DEBUG "Adding fd \"%s\", ino #%u\n", fd->name, fd->ino));
+
+ jffs2_add_fd_to_list(c, fd, fdp);
+
+ return 0;
+}
+
+/*
+ * Helper function for jffs2_get_inode_nodes().
+ * It is called every time an inode node is found.
+ *
+ * Returns: 0 on succes;
+ * 1 if the node should be marked obsolete;
+ * negative error code on failure.
+ */
+static inline int
+read_dnode(struct jffs2_sb_info *c,
+ struct jffs2_raw_node_ref *ref,
+ struct jffs2_raw_inode *rd,
+ uint32_t read,
+ struct rb_root *tnp,
+ int32_t *latest_mctime,
+ uint32_t *mctime_ver)
+{
+ struct jffs2_eraseblock *jeb;
+ struct jffs2_tmp_dnode_info *tn;
+
+ /* Obsoleted. This cannot happen, surely? dwmw2 20020308 */
+ BUG_ON(ref_obsolete(ref));
+
+ /* If we've never checked the CRCs on this node, check them now */
+ if (ref_flags(ref) == REF_UNCHECKED) {
+ uint32_t crc, len;
+
+ crc = crc32(0, rd, sizeof(*rd) - 8);
+ if (unlikely(crc != je32_to_cpu(rd->node_crc))) {
+ printk(KERN_WARNING "Header CRC failed on node at %#08x: read %#08x, calculated %#08x\n",
+ ref_offset(ref), je32_to_cpu(rd->node_crc), crc);
+ return 1;
+ }
+
+ /* Sanity checks */
+ if (unlikely(je32_to_cpu(rd->offset) > je32_to_cpu(rd->isize)) ||
+ unlikely(PAD(je32_to_cpu(rd->csize) + sizeof(*rd)) != PAD(je32_to_cpu(rd->totlen)))) {
+ printk(KERN_WARNING "Inode corrupted at %#08x, totlen %d, #ino %d, version %d, "
+ "isize %d, csize %d, dsize %d \n",
+ ref_offset(ref), je32_to_cpu(rd->totlen), je32_to_cpu(rd->ino),
+ je32_to_cpu(rd->version), je32_to_cpu(rd->isize),
+ je32_to_cpu(rd->csize), je32_to_cpu(rd->dsize));
+ return 1;
+ }
+
+ if (rd->compr != JFFS2_COMPR_ZERO && je32_to_cpu(rd->csize)) {
+ unsigned char *buf = NULL;
+ uint32_t pointed = 0;
+ int err;
+#ifndef __ECOS
+ if (c->mtd->point) {
+ err = c->mtd->point (c->mtd, ref_offset(ref) + sizeof(*rd), je32_to_cpu(rd->csize),
+ &read, &buf);
+ if (unlikely(read < je32_to_cpu(rd->csize)) && likely(!err)) {
+ D1(printk(KERN_DEBUG "MTD point returned len too short: 0x%zx\n", read));
+ c->mtd->unpoint(c->mtd, buf, ref_offset(ref) + sizeof(*rd),
+ je32_to_cpu(rd->csize));
+ } else if (unlikely(err)){
+ D1(printk(KERN_DEBUG "MTD point failed %d\n", err));
+ } else
+ pointed = 1; /* succefully pointed to device */
+ }
+#endif
+ if(!pointed){
+ buf = kmalloc(je32_to_cpu(rd->csize), GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ err = jffs2_flash_read(c, ref_offset(ref) + sizeof(*rd), je32_to_cpu(rd->csize),
+ &read, buf);
+ if (unlikely(read != je32_to_cpu(rd->csize)) && likely(!err))
+ err = -EIO;
+ if (err) {
+ kfree(buf);
+ return err;
+ }
+ }
+ crc = crc32(0, buf, je32_to_cpu(rd->csize));
+ if(!pointed)
+ kfree(buf);
+#ifndef __ECOS
+ else
+ c->mtd->unpoint(c->mtd, buf, ref_offset(ref) + sizeof(*rd), je32_to_cpu(rd->csize));
+#endif
+
+ if (crc != je32_to_cpu(rd->data_crc)) {
+ printk(KERN_NOTICE "Data CRC failed on node at %#08x: read %#08x, calculated %#08x\n",
+ ref_offset(ref), je32_to_cpu(rd->data_crc), crc);
+ return 1;
+ }
+
+ }
+
+ /* Mark the node as having been checked and fix the accounting accordingly */
+ jeb = &c->blocks[ref->flash_offset / c->sector_size];
+ len = ref_totlen(c, jeb, ref);
+
+ spin_lock(&c->erase_completion_lock);
+ jeb->used_size += len;
+ jeb->unchecked_size -= len;
+ c->used_size += len;
+ c->unchecked_size -= len;
+
+ /* If node covers at least a whole page, or if it starts at the
+ beginning of a page and runs to the end of the file, or if
+ it's a hole node, mark it REF_PRISTINE, else REF_NORMAL.
+
+ If it's actually overlapped, it'll get made NORMAL (or OBSOLETE)
+ when the overlapping node(s) get added to the tree anyway.
+ */
+ if ((je32_to_cpu(rd->dsize) >= PAGE_CACHE_SIZE) ||
+ ( ((je32_to_cpu(rd->offset) & (PAGE_CACHE_SIZE-1))==0) &&
+ (je32_to_cpu(rd->dsize) + je32_to_cpu(rd->offset) == je32_to_cpu(rd->isize)))) {
+ D1(printk(KERN_DEBUG "Marking node at %#08x REF_PRISTINE\n", ref_offset(ref)));
+ ref->flash_offset = ref_offset(ref) | REF_PRISTINE;
+ } else {
+ D1(printk(KERN_DEBUG "Marking node at %#08x REF_NORMAL\n", ref_offset(ref)));
+ ref->flash_offset = ref_offset(ref) | REF_NORMAL;
+ }
+ spin_unlock(&c->erase_completion_lock);
+ }
+
+ tn = jffs2_alloc_tmp_dnode_info();
+ if (!tn) {
+ D1(printk(KERN_DEBUG "alloc tn failed\n"));
+ return -ENOMEM;
+ }
+
+ tn->fn = jffs2_alloc_full_dnode();
+ if (!tn->fn) {
+ D1(printk(KERN_DEBUG "alloc fn failed\n"));
+ jffs2_free_tmp_dnode_info(tn);
+ return -ENOMEM;
+ }
+
+ tn->version = je32_to_cpu(rd->version);
+ tn->fn->ofs = je32_to_cpu(rd->offset);
+ tn->fn->raw = ref;
+
+ /* There was a bug where we wrote hole nodes out with
+ csize/dsize swapped. Deal with it */
+ if (rd->compr == JFFS2_COMPR_ZERO && !je32_to_cpu(rd->dsize) && je32_to_cpu(rd->csize))
+ tn->fn->size = je32_to_cpu(rd->csize);
+ else // normal case...
+ tn->fn->size = je32_to_cpu(rd->dsize);
+
+ D1(printk(KERN_DEBUG "dnode @%08x: ver %u, offset %#04x, dsize %#04x\n",
+ ref_offset(ref), je32_to_cpu(rd->version),
+ je32_to_cpu(rd->offset), je32_to_cpu(rd->dsize)));
+
+ jffs2_add_tn_to_tree(tn, tnp);
+
+ return 0;
+}
+
+/*
+ * Helper function for jffs2_get_inode_nodes().
+ * It is called every time an unknown node is found.
+ *
+ * Returns: 0 on succes;
+ * 1 if the node should be marked obsolete;
+ * negative error code on failure.
+ */
+static inline int
+read_unknown(struct jffs2_sb_info *c,
+ struct jffs2_raw_node_ref *ref,
+ struct jffs2_unknown_node *un,
+ uint32_t read)
+{
+ /* We don't mark unknown nodes as REF_UNCHECKED */
+ BUG_ON(ref_flags(ref) == REF_UNCHECKED);
+
+ un->nodetype = cpu_to_je16(JFFS2_NODE_ACCURATE | je16_to_cpu(un->nodetype));
+
+ if (crc32(0, un, sizeof(struct jffs2_unknown_node) - 4) != je32_to_cpu(un->hdr_crc)) {
+
+ /* Hmmm. This should have been caught at scan time. */
+ printk(KERN_WARNING "Warning! Node header CRC failed at %#08x. "
+ "But it must have been OK earlier.\n", ref_offset(ref));
+ D1(printk(KERN_DEBUG "Node was: { %#04x, %#04x, %#08x, %#08x }\n",
+ je16_to_cpu(un->magic), je16_to_cpu(un->nodetype),
+ je32_to_cpu(un->totlen), je32_to_cpu(un->hdr_crc)));
+ return 1;
+ } else {
+ switch(je16_to_cpu(un->nodetype) & JFFS2_COMPAT_MASK) {
+
+ case JFFS2_FEATURE_INCOMPAT:
+ printk(KERN_NOTICE "Unknown INCOMPAT nodetype %#04X at %#08x\n",
+ je16_to_cpu(un->nodetype), ref_offset(ref));
+ /* EEP */
+ BUG();
+ break;
+
+ case JFFS2_FEATURE_ROCOMPAT:
+ printk(KERN_NOTICE "Unknown ROCOMPAT nodetype %#04X at %#08x\n",
+ je16_to_cpu(un->nodetype), ref_offset(ref));
+ BUG_ON(!(c->flags & JFFS2_SB_FLAG_RO));
+ break;
+
+ case JFFS2_FEATURE_RWCOMPAT_COPY:
+ printk(KERN_NOTICE "Unknown RWCOMPAT_COPY nodetype %#04X at %#08x\n",
+ je16_to_cpu(un->nodetype), ref_offset(ref));
+ break;
+
+ case JFFS2_FEATURE_RWCOMPAT_DELETE:
+ printk(KERN_NOTICE "Unknown RWCOMPAT_DELETE nodetype %#04X at %#08x\n",
+ je16_to_cpu(un->nodetype), ref_offset(ref));
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
/* Get tmp_dnode_info and full_dirent for all non-obsolete nodes associated
with this ino, returning the former in order of version */
@@ -146,9 +447,8 @@
uint32_t *mctime_ver)
{
struct jffs2_raw_node_ref *ref, *valid_ref;
- struct jffs2_tmp_dnode_info *tn;
struct rb_root ret_tn = RB_ROOT;
- struct jffs2_full_dirent *fd, *ret_fd = NULL;
+ struct jffs2_full_dirent *ret_fd = NULL;
union jffs2_node_union node;
size_t retlen;
int err;
@@ -186,292 +486,67 @@
goto free_out;
}
-
- /* Check we've managed to read at least the common node header */
- if (retlen < min_t(uint32_t, ref_totlen(c, NULL, ref), sizeof(node.u))) {
- printk(KERN_WARNING "short read in get_inode_nodes()\n");
- err = -EIO;
- goto free_out;
- }
-
switch (je16_to_cpu(node.u.nodetype)) {
+
case JFFS2_NODETYPE_DIRENT:
D1(printk(KERN_DEBUG "Node at %08x (%d) is a dirent node\n", ref_offset(ref), ref_flags(ref)));
- if (ref_flags(ref) == REF_UNCHECKED) {
- printk(KERN_WARNING "BUG: Dirent node at 0x%08x never got checked? How?\n", ref_offset(ref));
- BUG();
- }
+
if (retlen < sizeof(node.d)) {
- printk(KERN_WARNING "short read in get_inode_nodes()\n");
+ printk(KERN_WARNING "Warning! Short read dirent at %#08x\n", ref_offset(ref));
err = -EIO;
goto free_out;
}
- /* sanity check */
- if (PAD((node.d.nsize + sizeof (node.d))) != PAD(je32_to_cpu (node.d.totlen))) {
- printk(KERN_NOTICE "jffs2_get_inode_nodes(): Illegal nsize in node at 0x%08x: nsize 0x%02x, totlen %04x\n",
- ref_offset(ref), node.d.nsize, je32_to_cpu(node.d.totlen));
+
+ err = read_direntry(c, ref, &node.d, retlen, &ret_fd, latest_mctime, mctime_ver);
+ if (err == 1) {
jffs2_mark_node_obsolete(c, ref);
- spin_lock(&c->erase_completion_lock);
- continue;
- }
+ break;
+ } else if (unlikely(err))
+ goto free_out;
+
if (je32_to_cpu(node.d.version) > *highest_version)
*highest_version = je32_to_cpu(node.d.version);
- if (ref_obsolete(ref)) {
- /* Obsoleted. This cannot happen, surely? dwmw2 20020308 */
- printk(KERN_ERR "Dirent node at 0x%08x became obsolete while we weren't looking\n",
- ref_offset(ref));
- BUG();
- }
-
- fd = jffs2_alloc_full_dirent(node.d.nsize+1);
- if (!fd) {
- err = -ENOMEM;
- goto free_out;
- }
- fd->raw = ref;
- fd->version = je32_to_cpu(node.d.version);
- fd->ino = je32_to_cpu(node.d.ino);
- fd->type = node.d.type;
-
- /* Pick out the mctime of the latest dirent */
- if(fd->version > *mctime_ver) {
- *mctime_ver = fd->version;
- *latest_mctime = je32_to_cpu(node.d.mctime);
- }
- /* memcpy as much of the name as possible from the raw
- dirent we've already read from the flash
- */
- if (retlen > sizeof(struct jffs2_raw_dirent))
- memcpy(&fd->name[0], &node.d.name[0], min_t(uint32_t, node.d.nsize, (retlen-sizeof(struct jffs2_raw_dirent))));
-
- /* Do we need to copy any more of the name directly
- from the flash?
- */
- if (node.d.nsize + sizeof(struct jffs2_raw_dirent) > retlen) {
- /* FIXME: point() */
- int already = retlen - sizeof(struct jffs2_raw_dirent);
-
- err = jffs2_flash_read(c, (ref_offset(ref)) + retlen,
- node.d.nsize - already, &retlen, &fd->name[already]);
- if (!err && retlen != node.d.nsize - already)
- err = -EIO;
-
- if (err) {
- printk(KERN_WARNING "Read remainder of name in jffs2_get_inode_nodes(): error %d\n", err);
- jffs2_free_full_dirent(fd);
- goto free_out;
- }
- }
- fd->nhash = full_name_hash(fd->name, node.d.nsize);
- fd->next = NULL;
- fd->name[node.d.nsize] = '\0';
- /* Wheee. We now have a complete jffs2_full_dirent structure, with
- the name in it and everything. Link it into the list
- */
- D1(printk(KERN_DEBUG "Adding fd \"%s\", ino #%u\n", fd->name, fd->ino));
- jffs2_add_fd_to_list(c, fd, &ret_fd);
break;
case JFFS2_NODETYPE_INODE:
D1(printk(KERN_DEBUG "Node at %08x (%d) is a data node\n", ref_offset(ref), ref_flags(ref)));
+
if (retlen < sizeof(node.i)) {
- printk(KERN_WARNING "read too short for dnode\n");
+ printk(KERN_WARNING "Warning! Short read dnode at %#08x\n", ref_offset(ref));
err = -EIO;
goto free_out;
}
- 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;
+ err = read_dnode(c, ref, &node.i, retlen, &ret_tn, latest_mctime, mctime_ver);
+ if (err == 1) {
+ jffs2_mark_node_obsolete(c, ref);
+ break;
+ } else if (unlikely(err))
goto free_out;
- }
- tn->fn = jffs2_alloc_full_dnode();
- if (!tn->fn) {
- D1(printk(KERN_DEBUG "alloc fn failed\n"));
- err = -ENOMEM;
- jffs2_free_tmp_dnode_info(tn);
- goto free_out;
- }
- tn->version = je32_to_cpu(node.i.version);
- tn->fn->ofs = je32_to_cpu(node.i.offset);
- /* There was a bug where we wrote hole nodes out with
- csize/dsize swapped. Deal with it */
- if (node.i.compr == JFFS2_COMPR_ZERO && !je32_to_cpu(node.i.dsize) && je32_to_cpu(node.i.csize))
- tn->fn->size = je32_to_cpu(node.i.csize);
- else // normal case...
- tn->fn->size = je32_to_cpu(node.i.dsize);
- tn->fn->raw = ref;
- D1(printk(KERN_DEBUG "dnode @%08x: ver %u, offset %04x, dsize %04x\n",
- ref_offset(ref), je32_to_cpu(node.i.version),
- je32_to_cpu(node.i.offset), je32_to_cpu(node.i.dsize)));
- jffs2_add_tn_to_tree(tn, &ret_tn);
+ 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));
+
break;
default:
- if (ref_flags(ref) == REF_UNCHECKED) {
- struct jffs2_eraseblock *jeb;
- uint32_t len;
-
- printk(KERN_ERR "Eep. Unknown node type %04x at %08x was marked REF_UNCHECKED\n",
- je16_to_cpu(node.u.nodetype), ref_offset(ref));
-
- /* Mark the node as having been checked and fix the accounting accordingly */
- spin_lock(&c->erase_completion_lock);
- jeb = &c->blocks[ref->flash_offset / c->sector_size];
- len = ref_totlen(c, jeb, ref);
-
- jeb->used_size += len;
- jeb->unchecked_size -= len;
- c->used_size += len;
- c->unchecked_size -= len;
-
- mark_ref_normal(ref);
- spin_unlock(&c->erase_completion_lock);
+ /* Check we've managed to read at least the common node header */
+ if (retlen < sizeof(struct jffs2_unknown_node)) {
+ printk(KERN_WARNING "Warning! Short read unknown node at %#08x\n",
+ ref_offset(ref));
+ return -EIO;
}
- node.u.nodetype = cpu_to_je16(JFFS2_NODE_ACCURATE | je16_to_cpu(node.u.nodetype));
- if (crc32(0, &node, sizeof(struct jffs2_unknown_node)-4) != je32_to_cpu(node.u.hdr_crc)) {
- /* Hmmm. This should have been caught at scan time. */
- printk(KERN_ERR "Node header CRC failed at %08x. But it must have been OK earlier.\n",
- ref_offset(ref));
- printk(KERN_ERR "Node was: { %04x, %04x, %08x, %08x }\n",
- je16_to_cpu(node.u.magic), je16_to_cpu(node.u.nodetype), je32_to_cpu(node.u.totlen),
- je32_to_cpu(node.u.hdr_crc));
- jffs2_mark_node_obsolete(c, ref);
- } else switch(je16_to_cpu(node.u.nodetype) & JFFS2_COMPAT_MASK) {
- case JFFS2_FEATURE_INCOMPAT:
- printk(KERN_NOTICE "Unknown INCOMPAT nodetype %04X at %08x\n", je16_to_cpu(node.u.nodetype), ref_offset(ref));
- /* EEP */
- BUG();
- break;
- case JFFS2_FEATURE_ROCOMPAT:
- printk(KERN_NOTICE "Unknown ROCOMPAT nodetype %04X at %08x\n", je16_to_cpu(node.u.nodetype), ref_offset(ref));
- if (!(c->flags & JFFS2_SB_FLAG_RO))
- BUG();
- break;
- case JFFS2_FEATURE_RWCOMPAT_COPY:
- printk(KERN_NOTICE "Unknown RWCOMPAT_COPY nodetype %04X at %08x\n", je16_to_cpu(node.u.nodetype), ref_offset(ref));
- break;
- case JFFS2_FEATURE_RWCOMPAT_DELETE:
- printk(KERN_NOTICE "Unknown RWCOMPAT_DELETE nodetype %04X at %08x\n", je16_to_cpu(node.u.nodetype), ref_offset(ref));
+
+ err = read_unknown(c, ref, &node.u, retlen);
+ if (err == 1) {
jffs2_mark_node_obsolete(c, ref);
break;
- }
+ } else if (unlikely(err))
+ goto free_out;
}
spin_lock(&c->erase_completion_lock);
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