From: Rickard Andersson <rickard.andersson@axis.com>
To: <richard@nod.at>, <chengzhihao1@huawei.com>,
<linux-mtd@lists.infradead.org>, <rickard314.andersson@gmail.com>
Cc: <rickard.andersson@axis.com>, <kernel@axis.com>
Subject: [PATCH 1/2] ubi: Expose interface for reading erase counters
Date: Thu, 21 Nov 2024 11:21:56 +0100 [thread overview]
Message-ID: <20241121102157.3498056-1-rickard.andersson@axis.com> (raw)
Using the ioctl command 'UBI_IOCECNFO' user space can obtain mean
and max erase counters of a device. If fastmap is enabled also erase
counter information of that area and its complementary area is
provided.
Signed-off-by: Rickard Andersson <rickard.andersson@axis.com>
---
include/uapi/mtd/ubi-user.h | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/include/uapi/mtd/ubi-user.h b/include/uapi/mtd/ubi-user.h
index e1571603175e..00cc8a083675 100644
--- a/include/uapi/mtd/ubi-user.h
+++ b/include/uapi/mtd/ubi-user.h
@@ -175,6 +175,8 @@
#define UBI_IOCRPEB _IOW(UBI_IOC_MAGIC, 4, __s32)
/* Force scrubbing on the specified PEB */
#define UBI_IOCSPEB _IOW(UBI_IOC_MAGIC, 5, __s32)
+/* Read detailed device information */
+#define UBI_IOCECNFO _IOR(UBI_IOC_MAGIC, 6, struct ubi_ecinfo_res)
/* ioctl commands of the UBI control character device */
@@ -470,4 +472,27 @@ struct ubi_blkcreate_req {
__s8 padding[128];
} __packed;
+/**
+ * struct ubi_ecinfo_res - a data structure used in UBI device erase count
+ * information responses.
+ *
+ * @max_ec: Max physical erase block erase counter value of whole UBI device
+ * @mean_ec: Mean physical erase block erase counter value of whole UBI device
+ * @max_ec_fastmap: Max physical erase block erase counter value of fastmap area
+ * @mean_ec_fastmap: Mean physical erase block erase counter value of fastmap area
+ * @max_ec_data: Max physical erase block erase counter value of data area
+ * @mean_ec_data: Mean physical erase block erase counter value of data area
+ *
+ * @padding: reserved for future, not used, has to be zeroed
+ */
+struct ubi_ecinfo_res {
+ __s32 max_ec;
+ __s32 mean_ec;
+ __s32 max_ec_fastmap;
+ __s32 mean_ec_fastmap;
+ __s32 max_ec_data;
+ __s32 mean_ec_data;
+ __s8 padding[64];
+} __packed;
+
#endif /* __UBI_USER_H__ */
--
2.30.2
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next reply other threads:[~2024-11-21 10:22 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-11-21 10:21 Rickard Andersson [this message]
2024-11-21 10:21 ` [PATCH 2/2] ubi: Implement 'UBI_IOCECNFO' for reading erase counters Rickard Andersson
2024-11-21 10:37 ` [PATCH 1/2] ubi: Expose interface " Richard Weinberger
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