20060303a

1 files changed, 50 insertions, 0 deletions

diff --git a/libnandfs/eraseblock.c b/libnandfs/eraseblock.c
new file mode 100644
index 00000000..2ecd490f
--- /dev/null
+++ b/libnandfs/eraseblock.c
@@ -0,0 +1,50 @@
+#include "lib9.h"
+#include "logfs.h"
+#include "nandfs.h"
+#include "local.h"
+
+char *
+nandfseraseblock(Nandfs *nandfs, long block, void **llsavep, int *markedbad)
+{
+	NandfsBlockData *d;
+	char *errmsg;
+
+	if (markedbad)
+		*markedbad = 0;
+
+	errmsg = (*nandfs->erase)(nandfs->magic, nandfs->rawblocksize * (nandfs->baseblock + block));
+	if (errmsg) {
+		if (nandfs->blockdata) {
+			d = &nandfs->blockdata[block];
+			d->tag = LogfsTworse;
+			nandfs->worseblocks = 1;
+		}
+		if (strcmp(errmsg, Eio) != 0)
+			return errmsg;
+		if (markedbad) {
+			*markedbad = 1;
+			errmsg = nandfsmarkblockbad(nandfs, block);
+			if (strcmp(errmsg, Eio) != 0)
+				return errmsg;
+			return nil;
+		}
+		return errmsg;
+	}
+
+	if (nandfs->blockdata) {
+		ulong *llsave;
+		d = &nandfs->blockdata[block];
+		if (llsavep) {
+			llsave = nandfsrealloc(nil, sizeof(ulong));
+			if (llsave == nil)
+				return Enomem;
+			*llsave = d->nerase;
+			*llsavep = llsave;
+		}
+		d->tag = 0xff;
+		d->path = NandfsPathMask;
+		d->nerase = NandfsNeraseMask;
+	}
+	return  nil;
+}
+