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authorQuentin Schulz <quentin.schulz@bootlin.com>2018-07-02 11:43:51 +0200
committerRichard Weinberger <richard@nod.at>2018-08-15 00:25:21 +0200
commitc355aa465fce5b446789348a2c50c3eb58ee6756 (patch)
tree5333f16f778229dcd69b7c455eabb716f027592e /include/uapi/mtd
parent62652517753f3cdddce10935139cfa6e00f8da33 (diff)
downloadlinux-c355aa465fce5b446789348a2c50c3eb58ee6756.tar.bz2
ubi: expose the volume CRC check skip flag
Now that we have the logic for skipping CRC check for static UBI volumes in the core, let's expose it to users. This makes use of a padding byte in the volume description data structure as a flag. This flag only tell for now whether we should skip the CRC check of a volume. This checks the UBI volume for which we are trying to skip the CRC check is static. Let's also make sure that the flags passed to verify_mkvol_req are valid. We voluntarily do not take into account the skip_check flag in vol_cdev_write() as we want to make sure what we wrote was correctly written. Suggested-by: Boris Brezillon <boris.brezillon@bootlin.com> Signed-off-by: Quentin Schulz <quentin.schulz@bootlin.com> Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com> Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'include/uapi/mtd')
-rw-r--r--include/uapi/mtd/ubi-user.h18
1 files changed, 16 insertions, 2 deletions
diff --git a/include/uapi/mtd/ubi-user.h b/include/uapi/mtd/ubi-user.h
index 5b04a494d139..aad3b6201fc0 100644
--- a/include/uapi/mtd/ubi-user.h
+++ b/include/uapi/mtd/ubi-user.h
@@ -285,6 +285,20 @@ struct ubi_attach_req {
__s8 padding[10];
};
+/*
+ * UBI volume flags.
+ *
+ * @UBI_VOL_SKIP_CRC_CHECK_FLG: skip the CRC check done on a static volume at
+ * open time. Only valid for static volumes and
+ * should only be used if the volume user has a
+ * way to verify data integrity
+ */
+enum {
+ UBI_VOL_SKIP_CRC_CHECK_FLG = 0x1,
+};
+
+#define UBI_VOL_VALID_FLGS (UBI_VOL_SKIP_CRC_CHECK_FLG)
+
/**
* struct ubi_mkvol_req - volume description data structure used in
* volume creation requests.
@@ -292,7 +306,7 @@ struct ubi_attach_req {
* @alignment: volume alignment
* @bytes: volume size in bytes
* @vol_type: volume type (%UBI_DYNAMIC_VOLUME or %UBI_STATIC_VOLUME)
- * @padding1: reserved for future, not used, has to be zeroed
+ * @flags: volume flags (%UBI_VOL_SKIP_CRC_CHECK_FLG)
* @name_len: volume name length
* @padding2: reserved for future, not used, has to be zeroed
* @name: volume name
@@ -321,7 +335,7 @@ struct ubi_mkvol_req {
__s32 alignment;
__s64 bytes;
__s8 vol_type;
- __s8 padding1;
+ __u8 flags;
__s16 name_len;
__s8 padding2[4];
char name[UBI_MAX_VOLUME_NAME + 1];