[JFFS2] Correct handling of JFFS2_FEATURE_RWCOMPAT_COPY nodes.
We should preserve these when we come to garbage collect them, not let
them get erased. Use jffs2_garbage_collect_pristine() for this, and make
sure the summary code copes -- just refrain from writing a summary for any
block which contains a node we don't understand.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
diff --git a/fs/jffs2/gc.c b/fs/jffs2/gc.c
index 23587f8..b0a5c40 100644
--- a/fs/jffs2/gc.c
+++ b/fs/jffs2/gc.c
@@ -256,10 +256,14 @@
if (!raw->next_in_ino) {
/* Inode-less node. Clean marker, snapshot or something like that */
- /* FIXME: If it's something that needs to be copied, including something
- we don't grok that has JFFS2_NODETYPE_RWCOMPAT_COPY, we should do so */
spin_unlock(&c->erase_completion_lock);
- jffs2_mark_node_obsolete(c, raw);
+ if (ref_flags(raw) == REF_PRISTINE) {
+ /* It's an unknown node with JFFS2_FEATURE_RWCOMPAT_COPY */
+ jffs2_garbage_collect_pristine(c, NULL, raw);
+ } else {
+ /* Just mark it obsolete */
+ jffs2_mark_node_obsolete(c, raw);
+ }
up(&c->alloc_sem);
goto eraseit_lock;
}
@@ -533,15 +537,16 @@
D1(printk(KERN_DEBUG "Going to GC REF_PRISTINE node at 0x%08x\n", ref_offset(raw)));
- rawlen = ref_totlen(c, c->gcblock, raw);
+ alloclen = rawlen = ref_totlen(c, c->gcblock, raw);
/* Ask for a small amount of space (or the totlen if smaller) because we
don't want to force wastage of the end of a block if splitting would
work. */
- ret = jffs2_reserve_space_gc(c, min_t(uint32_t, sizeof(struct jffs2_raw_inode) +
- JFFS2_MIN_DATA_LEN, rawlen), &phys_ofs, &alloclen, rawlen);
- /* this is not the exact summary size of it,
- it is only an upper estimation */
+ if (ic && alloclen > sizeof(struct jffs2_raw_inode) + JFFS2_MIN_DATA_LEN)
+ alloclen = sizeof(struct jffs2_raw_inode) + JFFS2_MIN_DATA_LEN;
+
+ ret = jffs2_reserve_space_gc(c, alloclen, &phys_ofs, &alloclen, rawlen);
+ /* 'rawlen' is not the exact summary size; it is only an upper estimation */
if (ret)
return ret;
@@ -605,9 +610,12 @@
}
break;
default:
- printk(KERN_WARNING "Unknown node type for REF_PRISTINE node at 0x%08x: 0x%04x\n",
- ref_offset(raw), je16_to_cpu(node->u.nodetype));
- goto bail;
+ /* If it's inode-less, we don't _know_ what it is. Just copy it intact */
+ if (ic) {
+ printk(KERN_WARNING "Unknown node type for REF_PRISTINE node at 0x%08x: 0x%04x\n",
+ ref_offset(raw), je16_to_cpu(node->u.nodetype));
+ goto bail;
+ }
}
nraw = jffs2_alloc_raw_node_ref();
@@ -674,15 +682,16 @@
nraw->flash_offset |= REF_PRISTINE;
jffs2_add_physical_node_ref(c, nraw);
- /* Link into per-inode list. This is safe because of the ic
- state being INO_STATE_GC. Note that if we're doing this
- for an inode which is in-core, the 'nraw' pointer is then
- going to be fetched from ic->nodes by our caller. */
- spin_lock(&c->erase_completion_lock);
- nraw->next_in_ino = ic->nodes;
- ic->nodes = nraw;
- spin_unlock(&c->erase_completion_lock);
-
+ if (ic) {
+ /* Link into per-inode list. This is safe because of the ic
+ state being INO_STATE_GC. Note that if we're doing this
+ for an inode which is in-core, the 'nraw' pointer is then
+ going to be fetched from ic->nodes by our caller. */
+ spin_lock(&c->erase_completion_lock);
+ nraw->next_in_ino = ic->nodes;
+ ic->nodes = nraw;
+ spin_unlock(&c->erase_completion_lock);
+ }
jffs2_mark_node_obsolete(c, raw);
D1(printk(KERN_DEBUG "WHEEE! GC REF_PRISTINE node at 0x%08x succeeded\n", ref_offset(raw)));