diff options
Diffstat (limited to 'include/mtd')
| -rw-r--r-- | include/mtd/ubi-header.h | 79 | ||||
| -rw-r--r-- | include/mtd/ubi-user.h | 51 |
2 files changed, 88 insertions, 42 deletions
diff --git a/include/mtd/ubi-header.h b/include/mtd/ubi-header.h index 69d5d7e..5dacbf7 100644 --- a/include/mtd/ubi-header.h +++ b/include/mtd/ubi-header.h @@ -30,6 +30,7 @@ #ifndef __UBI_HEADER_H__ #define __UBI_HEADER_H__ +#include <stdint.h> #include <asm/byteorder.h> /* The version of UBI images supported by this implementation */ @@ -116,8 +117,8 @@ enum { #define UBI_VID_HDR_SIZE sizeof(struct ubi_vid_hdr) /* Sizes of UBI headers without the ending CRC */ -#define UBI_EC_HDR_SIZE_CRC (UBI_EC_HDR_SIZE - sizeof(__be32)) -#define UBI_VID_HDR_SIZE_CRC (UBI_VID_HDR_SIZE - sizeof(__be32)) +#define UBI_EC_HDR_SIZE_CRC (UBI_EC_HDR_SIZE - sizeof(uint32_t)) +#define UBI_VID_HDR_SIZE_CRC (UBI_VID_HDR_SIZE - sizeof(uint32_t)) /** * struct ubi_ec_hdr - UBI erase counter header. @@ -145,14 +146,14 @@ enum { * eraseblocks. */ struct ubi_ec_hdr { - __be32 magic; - __u8 version; - __u8 padding1[3]; - __be64 ec; /* Warning: the current limit is 31-bit anyway! */ - __be32 vid_hdr_offset; - __be32 data_offset; - __u8 padding2[36]; - __be32 hdr_crc; + uint32_t magic; + uint8_t version; + uint8_t padding1[3]; + uint64_t ec; /* Warning: the current limit is 31-bit anyway! */ + uint32_t vid_hdr_offset; + uint32_t data_offset; + uint8_t padding2[36]; + uint32_t hdr_crc; } __attribute__ ((packed)); /** @@ -270,22 +271,22 @@ struct ubi_ec_hdr { * software (say, cramfs) on top of the UBI volume. */ struct ubi_vid_hdr { - __be32 magic; - __u8 version; - __u8 vol_type; - __u8 copy_flag; - __u8 compat; - __be32 vol_id; - __be32 lnum; - __be32 leb_ver; /* obsolete, to be removed, don't use */ - __be32 data_size; - __be32 used_ebs; - __be32 data_pad; - __be32 data_crc; - __u8 padding1[4]; - __be64 sqnum; - __u8 padding2[12]; - __be32 hdr_crc; + uint32_t magic; + uint8_t version; + uint8_t vol_type; + uint8_t copy_flag; + uint8_t compat; + uint32_t vol_id; + uint32_t lnum; + uint32_t leb_ver; /* obsolete, to be removed, don't use */ + uint32_t data_size; + uint32_t used_ebs; + uint32_t data_pad; + uint32_t data_crc; + uint8_t padding1[4]; + uint64_t sqnum; + uint8_t padding2[12]; + uint32_t hdr_crc; } __attribute__ ((packed)); /* Internal UBI volumes count */ @@ -299,7 +300,9 @@ struct ubi_vid_hdr { /* The layout volume contains the volume table */ -#define UBI_LAYOUT_VOL_ID UBI_INTERNAL_VOL_START +#define UBI_LAYOUT_VOLUME_ID UBI_INTERNAL_VOL_START +#define UBI_LAYOUT_VOLUME_TYPE UBI_VID_DYNAMIC +#define UBI_LAYOUT_VOLUME_ALIGN 1 #define UBI_LAYOUT_VOLUME_EBS 2 #define UBI_LAYOUT_VOLUME_NAME "layout volume" #define UBI_LAYOUT_VOLUME_COMPAT UBI_COMPAT_REJECT @@ -314,7 +317,7 @@ struct ubi_vid_hdr { #define UBI_VTBL_RECORD_SIZE sizeof(struct ubi_vtbl_record) /* Size of the volume table record without the ending CRC */ -#define UBI_VTBL_RECORD_SIZE_CRC (UBI_VTBL_RECORD_SIZE - sizeof(__be32)) +#define UBI_VTBL_RECORD_SIZE_CRC (UBI_VTBL_RECORD_SIZE - sizeof(uint32_t)) /** * struct ubi_vtbl_record - a record in the volume table. @@ -355,16 +358,16 @@ struct ubi_vid_hdr { * Empty records contain all zeroes and the CRC checksum of those zeroes. */ struct ubi_vtbl_record { - __be32 reserved_pebs; - __be32 alignment; - __be32 data_pad; - __u8 vol_type; - __u8 upd_marker; - __be16 name_len; - __u8 name[UBI_VOL_NAME_MAX+1]; - __u8 flags; - __u8 padding[23]; - __be32 crc; + uint32_t reserved_pebs; + uint32_t alignment; + uint32_t data_pad; + uint8_t vol_type; + uint8_t upd_marker; + uint16_t name_len; + uint8_t name[UBI_VOL_NAME_MAX+1]; + uint8_t flags; + uint8_t padding[23]; + uint32_t crc; } __attribute__ ((packed)); #endif /* !__UBI_HEADER_H__ */ diff --git a/include/mtd/ubi-user.h b/include/mtd/ubi-user.h index 4d184a7..a7421f1 100644 --- a/include/mtd/ubi-user.h +++ b/include/mtd/ubi-user.h @@ -63,7 +63,7 @@ * * Volume update should be done via the %UBI_IOCVOLUP IOCTL command of the * corresponding UBI volume character device. A pointer to a 64-bit update - * size should be passed to the IOCTL. After then, UBI expects user to write + * size should be passed to the IOCTL. After this, UBI expects user to write * this number of bytes to the volume character device. The update is finished * when the claimed number of bytes is passed. So, the volume update sequence * is something like: @@ -72,6 +72,15 @@ * ioctl(fd, UBI_IOCVOLUP, &image_size); * write(fd, buf, image_size); * close(fd); + * + * Atomic eraseblock change + * ~~~~~~~~~~~~~~~~~~~~~~~~ + * + * Atomic eraseblock change operation is done via the %UBI_IOCEBCH IOCTL + * command of the corresponding UBI volume character device. A pointer to + * &struct ubi_leb_change_req has to be passed to the IOCTL. Then the user is + * expected to write the requested amount of bytes. This is similar to the + * "volume update" IOCTL. */ /* @@ -113,11 +122,30 @@ #define UBI_IOCVOLUP _IOW(UBI_VOL_IOC_MAGIC, 0, int64_t) /* An eraseblock erasure command, used for debugging, disabled by default */ #define UBI_IOCEBER _IOW(UBI_VOL_IOC_MAGIC, 1, int32_t) +/* An atomic eraseblock change command */ +#define UBI_IOCEBCH _IOW(UBI_VOL_IOC_MAGIC, 2, int32_t) /* Maximum MTD device name length supported by UBI */ #define MAX_UBI_MTD_NAME_LEN 127 /* + * UBI data type hint constants. + * + * UBI_LONGTERM: long-term data + * UBI_SHORTTERM: short-term data + * UBI_UNKNOWN: data persistence is unknown + * + * These constants are used when data is written to UBI volumes in order to + * help the UBI wear-leveling unit to find more appropriate physical + * eraseblocks. + */ +enum { + UBI_LONGTERM = 1, + UBI_SHORTTERM = 2, + UBI_UNKNOWN = 3, +}; + +/* * UBI volume type constants. * * @UBI_DYNAMIC_VOLUME: dynamic volume @@ -125,7 +153,7 @@ */ enum { UBI_DYNAMIC_VOLUME = 3, - UBI_STATIC_VOLUME = 4, + UBI_STATIC_VOLUME = 4, }; /** @@ -137,7 +165,7 @@ enum { * * This data structure is used to specify MTD device UBI has to attach and the * parameters it has to use. The number which should be assigned to the new UBI - * device is passed in @ubi_num. UBI may automatically assing the number if + * device is passed in @ubi_num. UBI may automatically assign the number if * @UBI_DEV_NUM_AUTO is passed. In this case, the device number is returned in * @ubi_num. * @@ -176,7 +204,7 @@ struct ubi_attach_req { * @padding2: reserved for future, not used, has to be zeroed * @name: volume name * - * This structure is used by userspace programs when creating new volumes. The + * This structure is used by user-space programs when creating new volumes. The * @used_bytes field is only necessary when creating static volumes. * * The @alignment field specifies the required alignment of the volume logical @@ -222,4 +250,19 @@ struct ubi_rsvol_req { int32_t vol_id; } __attribute__ ((packed)); +/** + * struct ubi_leb_change_req - a data structure used in atomic logical + * eraseblock change requests. + * @lnum: logical eraseblock number to change + * @bytes: how many bytes will be written to the logical eraseblock + * @dtype: data type (%UBI_LONGTERM, %UBI_SHORTTERM, %UBI_UNKNOWN) + * @padding: reserved for future, not used, has to be zeroed + */ +struct ubi_leb_change_req { + int32_t lnum; + int32_t bytes; + uint8_t dtype; + uint8_t padding[7]; +} __attribute__ ((packed)); + #endif /* __UBI_USER_H__ */ |