2021-07-29 11:50:19 +00:00
|
|
|
From 2a2af518266a29323cf30c3f9ba9ef2ceb1dd84b Mon Sep 17 00:00:00 2001
|
|
|
|
|
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
|
|
|
|
|
Date: Thu, 16 Oct 2014 20:52:16 +0200
|
|
|
|
|
Subject: [PATCH] UBI: Detect EOF mark and erase all remaining blocks
|
|
|
|
|
MIME-Version: 1.0
|
|
|
|
|
Content-Type: text/plain; charset=UTF-8
|
|
|
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
|
|
|
|
|
|
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
|
|
|
|
|
---
|
|
|
|
|
drivers/mtd/ubi/attach.c | 5 +++++
|
|
|
|
|
drivers/mtd/ubi/io.c | 4 ++++
|
|
|
|
|
drivers/mtd/ubi/ubi.h | 1 +
|
|
|
|
|
3 files changed, 10 insertions(+)
|
|
|
|
|
|
|
|
|
|
--- a/drivers/mtd/ubi/attach.c
|
|
|
|
|
+++ b/drivers/mtd/ubi/attach.c
|
|
|
|
|
@@ -82,6 +82,9 @@ static int self_check_ai(struct ubi_devi
|
|
|
|
|
#define AV_ADD BIT(1)
|
|
|
|
|
#define AV_FIND_OR_ADD (AV_FIND | AV_ADD)
|
|
|
|
|
|
|
|
|
|
+/* Set on finding block with 0xdeadc0de, indicates erasing all blocks behind */
|
|
|
|
|
+bool erase_all_next;
|
|
|
|
|
+
|
|
|
|
|
/**
|
|
|
|
|
* find_or_add_av - internal function to find a volume, add a volume or do
|
|
|
|
|
* both (find and add if missing).
|
|
|
|
|
@@ -1580,6 +1583,8 @@ int ubi_attach(struct ubi_device *ubi, i
|
|
|
|
|
if (!ai)
|
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
|
|
+ erase_all_next = false;
|
|
|
|
|
+
|
|
|
|
|
#ifdef CONFIG_MTD_UBI_FASTMAP
|
|
|
|
|
/* On small flash devices we disable fastmap in any case. */
|
|
|
|
|
if ((int)mtd_div_by_eb(ubi->mtd->size, ubi->mtd) <= UBI_FM_MAX_START) {
|
|
|
|
|
--- a/drivers/mtd/ubi/io.c
|
|
|
|
|
+++ b/drivers/mtd/ubi/io.c
|
|
|
|
|
@@ -710,6 +710,10 @@ int ubi_io_read_ec_hdr(struct ubi_device
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
magic = be32_to_cpu(ec_hdr->magic);
|
|
|
|
|
+ if (magic == 0xdeadc0de)
|
|
|
|
|
+ erase_all_next = true;
|
|
|
|
|
+ if (erase_all_next)
|
|
|
|
|
+ return read_err ? UBI_IO_FF_BITFLIPS : UBI_IO_FF;
|
|
|
|
|
if (magic != UBI_EC_HDR_MAGIC) {
|
|
|
|
|
if (mtd_is_eccerr(read_err))
|
|
|
|
|
return UBI_IO_BAD_HDR_EBADMSG;
|
|
|
|
|
--- a/drivers/mtd/ubi/ubi.h
|
|
|
|
|
+++ b/drivers/mtd/ubi/ubi.h
|
2021-08-02 11:20:46 +00:00
|
|
|
@@ -824,6 +824,7 @@ extern struct mutex ubi_devices_mutex;
|
2021-07-29 11:50:19 +00:00
|
|
|
extern struct blocking_notifier_head ubi_notifiers;
|
|
|
|
|
|
|
|
|
|
/* attach.c */
|
|
|
|
|
+extern bool erase_all_next;
|
|
|
|
|
struct ubi_ainf_peb *ubi_alloc_aeb(struct ubi_attach_info *ai, int pnum,
|
|
|
|
|
int ec);
|
|
|
|
|
void ubi_free_aeb(struct ubi_attach_info *ai, struct ubi_ainf_peb *aeb);
|
