linux-kernel - [PATCH 12/14] ubi: uapi: Add mode selector to attach request

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Date:   Wed, 13 Jun 2018 23:23:42 +0200
From:   Richard Weinberger <richard@....at>
To:     linux-mtd@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, Richard Weinberger <richard@....at>
Subject: [PATCH 12/14] ubi: uapi: Add mode selector to attach request

This allows userspace, ubiattach, to force a full scan.

Signed-off-by: Richard Weinberger <richard@....at>
---
 include/uapi/mtd/ubi-user.h | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/include/uapi/mtd/ubi-user.h b/include/uapi/mtd/ubi-user.h
index 5b04a494d139..cc0e54cfa7f9 100644
--- a/include/uapi/mtd/ubi-user.h
+++ b/include/uapi/mtd/ubi-user.h
@@ -235,12 +235,19 @@ enum {
 	UBI_VOL_PROP_DIRECT_WRITE = 1,
 };
 
+enum {
+	UBI_ATTACH_MODE_AUTO = 0x0,
+	UBI_ATTACH_MODE_SCAN = 0x1,
+	UBI_ATTACH_MODE_MAX = UBI_ATTACH_MODE_SCAN,
+};
+
 /**
  * struct ubi_attach_req - attach MTD device request.
  * @ubi_num: UBI device number to create
  * @mtd_num: MTD device number to attach
  * @vid_hdr_offset: VID header offset (use defaults if %0)
  * @max_beb_per1024: maximum expected number of bad PEB per 1024 PEBs
+ * @attach_mode: selects the attach mode
  * @padding: reserved for future, not used, has to be zeroed
  *
  * This data structure is used to specify MTD device UBI has to attach and the
@@ -276,13 +283,18 @@ enum {
  * eraseblocks for new bad eraseblocks, but attempts to use available
  * eraseblocks (if any). The accepted range is 0-768. If 0 is given, the
  * default kernel value of %CONFIG_MTD_UBI_BEB_LIMIT will be used.
+ *
+ * @attach_mode is %UBI_ATTACH_MODE_AUTO by default, and let's the UBI
+ * implementation decide how to attach. If %UBI_ATTACH_MODE_SCAN is selected
+ * a full scan is forced.
  */
 struct ubi_attach_req {
 	__s32 ubi_num;
 	__s32 mtd_num;
 	__s32 vid_hdr_offset;
 	__s16 max_beb_per1024;
-	__s8 padding[10];
+	__s8 attach_mode;
+	__s8 padding[9];
 };
 
 /**
-- 
2.13.6