1125 lines
32 KiB
C
1125 lines
32 KiB
C
/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of The Linux Foundation. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <dev/flash-ubi.h>
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#include <dev/flash.h>
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#include <qpic_nand.h>
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#include <rand.h>
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static
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const uint32_t crc32_table[256] = {
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0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
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0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
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0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
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0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
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0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
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0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
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0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
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0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
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0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
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0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
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0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
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0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
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0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
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0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
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0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,
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0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
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0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
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0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
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0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
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0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
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0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
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0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
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0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
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0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
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0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
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0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
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0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,
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0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
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0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
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0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
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0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
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0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
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0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
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0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
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0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
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0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
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0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
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0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
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0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
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0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
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0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
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0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,
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0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
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0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
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0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
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0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
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0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
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0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
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0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
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0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
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0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
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0x2d02ef8dL
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};
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static uint32_t mtd_crc32(uint32_t crc, const void *buf, size_t size)
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{
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const uint8_t *p = buf;
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while (size--)
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crc = crc32_table[(crc ^ *p++) & 0xff] ^ (crc >> 8);
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return crc;
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}
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/**
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* check_pattern - check if buffer contains only a certain byte pattern.
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* @buf: buffer to check
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* @patt: the pattern to check
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* @size: buffer size in bytes
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*
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* This function returns %1 if there are only @patt bytes in @buf, and %0 if
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* something else was also found.
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*/
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int check_pattern(const void *buf, uint8_t patt, int size)
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{
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int i;
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for (i = 0; i < size; i++)
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if (((const uint8_t *)buf)[i] != patt)
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return 0;
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return 1;
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}
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/**
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* calc_data_len - calculate how much real data is stored in the buffer
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* @page_size: min I/O of the device
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* @buf: a buffer with the contents of the physical eraseblock
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* @len: the buffer length
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*
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* This function calculates how much "real data" is stored in @buf and
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* returns the length (in number of pages). Continuous 0xFF bytes at the end
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* of the buffer are not considered as "real data".
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*/
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static int calc_data_len(int page_size, const void *buf, int len)
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{
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int i;
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for (i = len - 1; i >= 0; i--)
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if (((const uint8_t *)buf)[i] != 0xFF)
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break;
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/* The resulting length must be aligned to the minimum flash I/O size */
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len = i + 1;
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len = (len + page_size - 1) / page_size;
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return len;
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}
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/**
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* read_ec_hdr - read and check an erase counter header.
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* @peb: number of the physical erase block to read the header for
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* @ec_hdr: a &struct ubi_ec_hdr object where to store the read erase counter
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* header
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*
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* This function reads erase counter header from physical eraseblock @peb and
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* stores it in @ec_hdr. This function also checks the validity of the read
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* header.
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*
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* Return codes:
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* -1 - in case of error
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* 0 - if PEB was found valid
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* 1 - if PEB is empty
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*/
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static int read_ec_hdr(uint32_t peb, struct ubi_ec_hdr *ec_hdr)
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{
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unsigned char *spare, *tmp_buf;
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int ret = -1;
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uint32_t crc;
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int page_size = flash_page_size();
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int num_pages_per_blk = flash_block_size()/page_size;
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spare = (unsigned char *)malloc(flash_spare_size());
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if (!spare)
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{
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dprintf(CRITICAL, "read_ec_hdr: Mem allocation failed\n");
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return ret;
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}
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tmp_buf = (unsigned char *)malloc(page_size);
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if (!tmp_buf)
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{
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dprintf(CRITICAL, "read_ec_hdr: Mem allocation failed\n");
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goto out_tmp_buf;
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}
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if (qpic_nand_block_isbad(peb * num_pages_per_blk)) {
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dprintf(CRITICAL, "read_ec_hdr: Bad block @ %d\n", peb);
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goto out;
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}
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if (qpic_nand_read(peb * num_pages_per_blk, 1, tmp_buf, spare)) {
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dprintf(CRITICAL, "read_ec_hdr: Read %d failed \n", peb);
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goto out;
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}
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memcpy(ec_hdr, tmp_buf, UBI_EC_HDR_SIZE);
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if (check_pattern((void *)ec_hdr, 0xFF, UBI_EC_HDR_SIZE)) {
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ret = 1;
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goto out;
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}
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/* Make sure we read a valid UBI EC_HEADER */
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if (BE32(ec_hdr->magic) != (uint32_t)UBI_EC_HDR_MAGIC) {
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dprintf(CRITICAL,
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"read_ec_hdr: Wrong magic at peb-%d Expected: %d, received %d\n",
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peb, UBI_EC_HDR_MAGIC, BE32(ec_hdr->magic));
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goto out;
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}
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if (ec_hdr->version != UBI_VERSION) {
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dprintf(CRITICAL,
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"read_ec_hdr: Wrong version at peb-%d Expected: %d, received %d\n",
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peb, UBI_VERSION, ec_hdr->version);
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goto out;
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}
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if (BE64(ec_hdr->ec) > UBI_MAX_ERASECOUNTER) {
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dprintf(CRITICAL,
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"read_ec_hdr: Wrong ec at peb-%d: %lld \n",
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peb, BE64(ec_hdr->ec));
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goto out;
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}
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crc = mtd_crc32(UBI_CRC32_INIT, ec_hdr, UBI_EC_HDR_SIZE_CRC);
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if (BE32(ec_hdr->hdr_crc) != crc) {
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dprintf(CRITICAL,
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"read_ec_hdr: Wrong crc at peb-%d: calculated %d, recived %d\n",
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peb,crc, BE32(ec_hdr->hdr_crc));
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goto out;
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}
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ret = 0;
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out:
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free(tmp_buf);
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out_tmp_buf:
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free(spare);
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return ret;
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}
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/**
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* read_vid_hdr - read and check an Volume identifier header.
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* @peb: number of the physical erase block to read the header for
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* @vid_hdr: a &struct ubi_vid_hdr object where to store the read header
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* @vid_hdr_offset: offset of the VID header from the beginning of the PEB
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* (in bytes)
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*
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* This function reads the volume identifier header from physical
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* eraseblock @peb and stores it in @vid_hdr. This function also checks the
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* validity of the read header.
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*
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* Return codes:
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* -1 - in case of error
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* 0 - on success
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* 1 - if the PEB is free (no VID hdr)
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*/
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static int read_vid_hdr(uint32_t peb, struct ubi_vid_hdr *vid_hdr,
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int vid_hdr_offset)
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{
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unsigned char *spare, *tmp_buf;
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int ret = -1;
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uint32_t crc, magic;
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int page_size = flash_page_size();
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int num_pages_per_blk = flash_block_size()/page_size;
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spare = (unsigned char *)malloc(flash_spare_size());
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if (!spare)
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{
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dprintf(CRITICAL, "read_vid_hdr: Mem allocation failed\n");
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return ret;
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}
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tmp_buf = (unsigned char *)malloc(page_size);
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if (!tmp_buf)
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{
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dprintf(CRITICAL, "read_vid_hdr: Mem allocation failed\n");
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goto out_tmp_buf;
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}
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if (qpic_nand_block_isbad(peb * num_pages_per_blk)) {
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dprintf(CRITICAL, "read_vid_hdr: Bad block @ %d\n", peb);
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goto out;
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}
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if (qpic_nand_read(peb * num_pages_per_blk + vid_hdr_offset/page_size,
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1, tmp_buf, spare)) {
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dprintf(CRITICAL, "read_vid_hdr: Read %d failed \n", peb);
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goto out;
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}
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memcpy(vid_hdr, tmp_buf, UBI_VID_HDR_SIZE);
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if (check_pattern((void *)vid_hdr, 0xFF, UBI_VID_HDR_SIZE)) {
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ret = 1;
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goto out;
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}
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magic = BE32(vid_hdr->magic);
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if (magic != UBI_VID_HDR_MAGIC) {
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dprintf(CRITICAL,
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"read_vid_hdr: Wrong magic at peb-%d Expected: %d, received %d\n",
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peb, UBI_VID_HDR_MAGIC, BE32(vid_hdr->magic));
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goto out;
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}
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|
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crc = mtd_crc32(UBI_CRC32_INIT, vid_hdr, UBI_EC_HDR_SIZE_CRC);
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if (BE32(vid_hdr->hdr_crc) != crc) {
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dprintf(CRITICAL,
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"read_vid_hdr: Wrong crc at peb-%d: calculated %d, received %d\n",
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peb,crc, BE32(vid_hdr->hdr_crc));
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goto out;
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}
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|
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ret = 0;
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out:
|
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free(tmp_buf);
|
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out_tmp_buf:
|
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free(spare);
|
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return ret;
|
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}
|
|
|
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/**
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* read_leb_data - read data section of the PEB (LEB).
|
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* @peb: number of the physical erase block to read the data for
|
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* @leb_data: a buffer where to store the read data at
|
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* @leb_size: LEB size
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* @data_offset: offset of the data from the beginning of the PEB
|
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* (in bytes)
|
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*
|
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* Return codes:
|
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* -1 - in case of error
|
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* 0 - on success
|
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*/
|
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static int read_leb_data(uint32_t peb, void *leb_data,
|
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int leb_size, int data_offset)
|
|
{
|
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unsigned char *spare, *tmp_buf;
|
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int ret = -1;
|
|
int page_size = flash_page_size();
|
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int block_size = flash_block_size();
|
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int num_pages_per_blk = block_size/page_size;
|
|
|
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spare = (unsigned char *)malloc(flash_spare_size());
|
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if (!spare)
|
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{
|
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dprintf(CRITICAL, "read_leb_data: Mem allocation failed\n");
|
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return ret;
|
|
}
|
|
|
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tmp_buf = (unsigned char *)malloc(leb_size);
|
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if (!tmp_buf)
|
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{
|
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dprintf(CRITICAL, "read_leb_data: Mem allocation failed\n");
|
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goto out_tmp_buf;
|
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}
|
|
|
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if (qpic_nand_block_isbad(peb * num_pages_per_blk)) {
|
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dprintf(CRITICAL, "read_leb_data: Bad block @ %d\n", peb);
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goto out;
|
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}
|
|
|
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if (qpic_nand_read(peb * num_pages_per_blk + data_offset/page_size,
|
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leb_size/page_size, tmp_buf, spare)) {
|
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dprintf(CRITICAL, "read_leb_data: Read %d failed \n", peb);
|
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goto out;
|
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}
|
|
memcpy(leb_data, tmp_buf, leb_size);
|
|
|
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ret = 0;
|
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out:
|
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free(tmp_buf);
|
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out_tmp_buf:
|
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free(spare);
|
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return ret;
|
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}
|
|
|
|
/**
|
|
* write_ec_header() - Write provided ec_header for given PEB
|
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* @peb: number of the physical erase block to write the header to
|
|
* @new_ech: the ec_header to write
|
|
*
|
|
* Return codes:
|
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* -1 - in case of error
|
|
* 0 - on success
|
|
*/
|
|
static int write_ec_header(uint32_t peb, struct ubi_ec_hdr *new_ech)
|
|
{
|
|
unsigned page_size = flash_page_size();
|
|
int num_pages_per_blk = flash_block_size()/page_size;
|
|
unsigned char *buf;
|
|
int ret = 0;
|
|
|
|
buf = malloc(sizeof(uint8_t) * page_size);
|
|
if (!buf) {
|
|
dprintf(CRITICAL, "write_ec_header: Mem allocation failed\n");
|
|
return -1;
|
|
}
|
|
|
|
memset(buf, 0, page_size);
|
|
ASSERT(page_size > sizeof(*new_ech));
|
|
memcpy(buf, new_ech, UBI_EC_HDR_SIZE);
|
|
ret = qpic_nand_write(peb * num_pages_per_blk, 1, buf, 0);
|
|
if (ret) {
|
|
dprintf(CRITICAL,
|
|
"write_ec_header: qpic_nand_write failed with %d\n", ret);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
free(buf);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* write_vid_header() - Write provided vid_header for given PEB
|
|
* @peb: number of the physical erase block to write the header to
|
|
* @new_vidh: the vid_header to write
|
|
* @offset: vid_hdr offset in bytes from the beginning of the PEB
|
|
*
|
|
* Return codes:
|
|
* -1 - in case of error
|
|
* 0 - on success
|
|
*/
|
|
static int write_vid_header(uint32_t peb,
|
|
struct ubi_vid_hdr *new_vidh, int offset)
|
|
{
|
|
unsigned page_size = flash_page_size();
|
|
int num_pages_per_blk = flash_block_size()/page_size;
|
|
unsigned char *buf;
|
|
int ret = 0;
|
|
|
|
buf = malloc(sizeof(uint8_t) * page_size);
|
|
if (!buf) {
|
|
dprintf(CRITICAL, "write_vid_header: Mem allocation failed\n");
|
|
return -1;
|
|
}
|
|
|
|
memset(buf, 0, page_size);
|
|
ASSERT(page_size > sizeof(*new_vidh));
|
|
memcpy(buf, new_vidh, UBI_VID_HDR_SIZE);
|
|
ret = qpic_nand_write(peb * num_pages_per_blk + offset/page_size,
|
|
1, buf, 0);
|
|
if (ret) {
|
|
dprintf(CRITICAL,
|
|
"write_vid_header: qpic_nand_write failed with %d\n", ret);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
free(buf);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* write_leb_data - write data section of the PEB (LEB).
|
|
* @peb: number of the physical erase block to write the data for
|
|
* @leb_data: a data buffer to write
|
|
* @size: data size
|
|
* @data_offset: offset of the data from the beginning of the PEB
|
|
* (in bytes)
|
|
*
|
|
* Return codes:
|
|
* -1 - in case of error
|
|
* 0 - on success
|
|
*/
|
|
static int write_leb_data(uint32_t peb, void *data,
|
|
int size, int data_offset)
|
|
{
|
|
unsigned char *tmp_buf;
|
|
int ret = -1;
|
|
int num_pages;
|
|
int page_size = flash_page_size();
|
|
int block_size = flash_block_size();
|
|
int num_pages_per_blk = block_size/page_size;
|
|
|
|
tmp_buf = (unsigned char *)malloc(block_size - data_offset);
|
|
if (!tmp_buf)
|
|
{
|
|
dprintf(CRITICAL, "write_leb_data: Mem allocation failed\n");
|
|
return -1;
|
|
}
|
|
|
|
if (size < block_size - data_offset)
|
|
num_pages = size / page_size;
|
|
else
|
|
num_pages = calc_data_len(page_size, data,
|
|
block_size - data_offset);
|
|
memcpy(tmp_buf, data, num_pages * page_size);
|
|
ret = qpic_nand_write(peb * num_pages_per_blk + data_offset/page_size,
|
|
num_pages, tmp_buf, 0);
|
|
if (ret) {
|
|
dprintf(CRITICAL,
|
|
"write_vid_header: qpic_nand_write failed with %d\n", ret);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
ret = 0;
|
|
out:
|
|
free(tmp_buf);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* scan_partition() - Collect the ec_headers info of a given partition
|
|
* @ptn: partition to read the headers of
|
|
*
|
|
* Returns allocated and filled struct ubi_scan_info (si).
|
|
* Note: si should be released by caller.
|
|
*/
|
|
static struct ubi_scan_info *scan_partition(struct ptentry *ptn)
|
|
{
|
|
struct ubi_scan_info *si;
|
|
struct ubi_ec_hdr *ec_hdr;
|
|
struct ubi_vid_hdr vid_hdr;
|
|
unsigned i;
|
|
unsigned long long sum = 0;
|
|
int page_size = flash_page_size();
|
|
int ret;
|
|
|
|
si = malloc(sizeof(*si));
|
|
if (!si) {
|
|
dprintf(CRITICAL,"scan_partition: (%s) Memory allocation failed\n",
|
|
ptn->name);
|
|
return NULL;
|
|
}
|
|
|
|
memset((void *)si, 0, sizeof(*si));
|
|
si->pebs_data = malloc(ptn->length * sizeof(struct peb_info));
|
|
if (!si->pebs_data) {
|
|
dprintf(CRITICAL,"scan_partition: (%s) Memory allocation failed\n",
|
|
ptn->name);
|
|
goto out_failed_pebs;
|
|
}
|
|
memset((void *)si->pebs_data, 0, ptn->length * sizeof(struct peb_info));
|
|
|
|
ec_hdr = malloc(UBI_EC_HDR_SIZE);
|
|
if (!ec_hdr) {
|
|
dprintf(CRITICAL,"scan_partition: (%s) Memory allocation failed\n",
|
|
ptn->name);
|
|
goto out_failed;
|
|
}
|
|
|
|
si->vid_hdr_offs = 0;
|
|
si->image_seq = rand() & UBI_IMAGE_SEQ_BASE;
|
|
si->vtbl_peb1 = -1;
|
|
si->vtbl_peb2 = -1;
|
|
si->fastmap_sb = -1;
|
|
for (i = 0; i < ptn->length; i++){
|
|
ret = read_ec_hdr(ptn->start + i, ec_hdr);
|
|
switch (ret) {
|
|
case 1:
|
|
si->empty_cnt++;
|
|
si->pebs_data[i].ec = UBI_MAX_ERASECOUNTER;
|
|
si->pebs_data[i].status = UBI_EMPTY_PEB;
|
|
break;
|
|
case 0:
|
|
if (!si->vid_hdr_offs) {
|
|
si->vid_hdr_offs = BE32(ec_hdr->vid_hdr_offset);
|
|
si->data_offs = BE32(ec_hdr->data_offset);
|
|
if (!si->vid_hdr_offs || !si->data_offs ||
|
|
si->vid_hdr_offs % page_size ||
|
|
si->data_offs % page_size) {
|
|
si->bad_cnt++;
|
|
si->pebs_data[i].ec = UBI_MAX_ERASECOUNTER;
|
|
si->vid_hdr_offs = 0;
|
|
continue;
|
|
}
|
|
if (BE32(ec_hdr->vid_hdr_offset) != si->vid_hdr_offs) {
|
|
si->bad_cnt++;
|
|
si->pebs_data[i].ec = UBI_MAX_ERASECOUNTER;
|
|
continue;
|
|
}
|
|
if (BE32(ec_hdr->data_offset) != si->data_offs) {
|
|
si->bad_cnt++;
|
|
si->pebs_data[i].ec = UBI_MAX_ERASECOUNTER;
|
|
continue;
|
|
}
|
|
}
|
|
si->read_image_seq = BE32(ec_hdr->image_seq);
|
|
si->pebs_data[i].ec = BE64(ec_hdr->ec);
|
|
/* Now read the VID header to find if the peb is free */
|
|
ret = read_vid_hdr(ptn->start + i, &vid_hdr,
|
|
BE32(ec_hdr->vid_hdr_offset));
|
|
switch (ret) {
|
|
case 1:
|
|
si->pebs_data[i].status = UBI_FREE_PEB;
|
|
si->free_cnt++;
|
|
break;
|
|
case 0:
|
|
si->pebs_data[i].status = UBI_USED_PEB;
|
|
si->pebs_data[i].volume = BE32(vid_hdr.vol_id);
|
|
if (BE32(vid_hdr.vol_id) == UBI_LAYOUT_VOLUME_ID) {
|
|
if (si->vtbl_peb1 == -1)
|
|
si->vtbl_peb1 = i;
|
|
else if (si->vtbl_peb2 == -1)
|
|
si->vtbl_peb2 = i;
|
|
else
|
|
dprintf(CRITICAL,
|
|
"scan_partition: Found > 2 copies of vtbl");
|
|
}
|
|
if (BE32(vid_hdr.vol_id) == UBI_FM_SB_VOLUME_ID)
|
|
si->fastmap_sb = i;
|
|
si->used_cnt++;
|
|
break;
|
|
case -1:
|
|
default:
|
|
si->bad_cnt++;
|
|
si->pebs_data[i].ec = UBI_MAX_ERASECOUNTER;
|
|
si->pebs_data[i].status = UBI_BAD_PEB;
|
|
break;
|
|
}
|
|
break;
|
|
case -1:
|
|
default:
|
|
si->bad_cnt++;
|
|
si->pebs_data[i].ec = UBI_MAX_ERASECOUNTER;
|
|
si->pebs_data[i].status = UBI_BAD_PEB;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Sanity check */
|
|
if (si->bad_cnt + si->empty_cnt + si->free_cnt + si->used_cnt != (int)ptn->length) {
|
|
dprintf(CRITICAL,"scan_partition: peb count doesn't sum up \n");
|
|
goto out_failed;
|
|
}
|
|
|
|
/*
|
|
* If less then 95% of the PEBs were "bad" (didn't have valid
|
|
* ec header), then set mean_ec = UBI_DEF_ERACE_COUNTER.
|
|
*/
|
|
sum = 0;
|
|
if ((si->free_cnt + si->used_cnt) &&
|
|
(double)((si->free_cnt + si->used_cnt) / ptn->length) * 100 > 95) {
|
|
for (i = 0; i < ptn->length; i++) {
|
|
if (si->pebs_data[i].ec == UBI_MAX_ERASECOUNTER)
|
|
continue;
|
|
sum += si->pebs_data[i].ec;
|
|
}
|
|
si->mean_ec = sum / (si->free_cnt + si->used_cnt);
|
|
} else {
|
|
si->mean_ec = UBI_DEF_ERACE_COUNTER;
|
|
}
|
|
free(ec_hdr);
|
|
return si;
|
|
|
|
out_failed:
|
|
free(si->pebs_data);
|
|
out_failed_pebs:
|
|
free(si);
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* update_ec_header() - Update provided ec_header
|
|
* @si: pointer to struct ubi_scan_info, holding the collected
|
|
* ec_headers information of the partition
|
|
* @index: index in si->ec[] of this peb. Relative to ptn->start
|
|
* @new_header: False if this is an update of an existing header.
|
|
* True if new header needs to be filled in
|
|
*/
|
|
static void update_ec_header(struct ubi_ec_hdr *old_ech,
|
|
const struct ubi_scan_info *si,
|
|
int index, bool new_header)
|
|
{
|
|
uint32_t crc;
|
|
|
|
if (si->pebs_data[index].ec < UBI_MAX_ERASECOUNTER)
|
|
old_ech->ec = BE64(si->pebs_data[index].ec + 1);
|
|
else
|
|
old_ech->ec = BE64(si->mean_ec);
|
|
|
|
if (new_header) {
|
|
old_ech->vid_hdr_offset = BE32(si->vid_hdr_offs);
|
|
old_ech->data_offset = BE32(si->data_offs);
|
|
old_ech->magic = BE32(UBI_EC_HDR_MAGIC);
|
|
old_ech->version = UBI_VERSION;
|
|
}
|
|
old_ech->image_seq = BE32(si->image_seq);
|
|
crc = mtd_crc32(UBI_CRC32_INIT,
|
|
(const void *)old_ech, UBI_EC_HDR_SIZE_CRC);
|
|
old_ech->hdr_crc = BE32(crc);
|
|
}
|
|
|
|
|
|
static void update_vid_header(struct ubi_vid_hdr *vid_hdr,
|
|
const struct ubi_scan_info *si, uint32_t vol_id,
|
|
uint32_t lnum, uint32_t data_pad)
|
|
{
|
|
uint32_t crc;
|
|
|
|
vid_hdr->vol_type = UBI_VID_DYNAMIC;
|
|
vid_hdr->sqnum = BE64(si->image_seq);
|
|
vid_hdr->vol_id = BE32(vol_id);
|
|
vid_hdr->lnum = BE32(lnum);
|
|
vid_hdr->compat = 0;
|
|
vid_hdr->data_pad = BE32(data_pad);
|
|
|
|
vid_hdr->magic = BE32(UBI_VID_HDR_MAGIC);
|
|
vid_hdr->version = UBI_VERSION;
|
|
crc = mtd_crc32(UBI_CRC32_INIT,
|
|
(const void *)vid_hdr, UBI_VID_HDR_SIZE_CRC);
|
|
vid_hdr->hdr_crc = BE32(crc);
|
|
}
|
|
|
|
/**
|
|
* fastmap_present - returns true if Fastmap superblock is found
|
|
* @data: raw data to test
|
|
*
|
|
* This function returns 1 if the provided PEB data contains
|
|
* Fastmap superblock, 0 otherwise
|
|
*/
|
|
static int fastmap_present(const void *data){
|
|
struct ubi_ec_hdr *ec_hdr = (struct ubi_ec_hdr *)(data);
|
|
struct ubi_vid_hdr *vid_hdr;
|
|
|
|
vid_hdr = (struct ubi_vid_hdr *)(data + BE32(ec_hdr->vid_hdr_offset));
|
|
if (BE32(vid_hdr->vol_id) == UBI_FM_SB_VOLUME_ID)
|
|
return 1;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ubi_erase_peb - Erase PEB and update EC header
|
|
* @peb_num: number of the PEB to erase
|
|
* @si: UBI scan information
|
|
* @ptn_start: first PEB of the flashed partition
|
|
*
|
|
* This function erases the given PEB (if required) and writes a new EC
|
|
* header for it.
|
|
*
|
|
* Returns: -1 on error
|
|
* 0 on success
|
|
*/
|
|
static int ubi_erase_peb(int peb_num, struct ubi_scan_info *si,
|
|
int ptn_start)
|
|
{
|
|
struct ubi_ec_hdr new_ech;
|
|
int page_size = flash_page_size();
|
|
int num_pages_per_blk = flash_block_size() / page_size;
|
|
int ret;
|
|
|
|
if (qpic_nand_blk_erase(peb_num * num_pages_per_blk)) {
|
|
dprintf(INFO, "ubi_erase_peb: erase of %d failed\n", peb_num);
|
|
return -1;
|
|
}
|
|
memset(&new_ech, 0xff, sizeof(new_ech));
|
|
update_ec_header(&new_ech, si, peb_num - ptn_start, true);
|
|
|
|
/* Write new ec_header */
|
|
ret = write_ec_header(peb_num, &new_ech);
|
|
if (ret) {
|
|
dprintf(CRITICAL, "ubi_erase_peb: write ec_header to %d failed\n",
|
|
peb_num);
|
|
return -1;
|
|
}
|
|
si->pebs_data[peb_num - ptn_start].status = UBI_FREE_PEB;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* remove_F_flag() - Turn off space-fixup flag in the ubifs superblock
|
|
* @data: pointer to the peb to check in the flashed image
|
|
*
|
|
* The UBIFS Superblock will be located at LEB 0 of the image. LEB 0 will be
|
|
* mapped as follows:
|
|
* If the image contains Fastmap superblock:
|
|
* - LEB 0 will be at PEB3
|
|
* else:
|
|
* - LEB 0 will be at PEB2
|
|
*/
|
|
static void remove_F_flag(const void *leb_data)
|
|
{
|
|
struct ubifs_ch *ch;
|
|
struct ubifs_sb_node *ubifs_sb;
|
|
struct ubi_ec_hdr *ech;
|
|
struct ubi_vid_hdr *vidh;
|
|
int vol_id;
|
|
|
|
ech = (struct ubi_ec_hdr *)leb_data;
|
|
vidh = (struct ubi_vid_hdr *)(leb_data + BE32(ech->vid_hdr_offset));
|
|
vol_id = BE32(vidh->vol_id);
|
|
|
|
if (vol_id > UBI_MAX_VOLUMES &&
|
|
vol_id != UBI_LAYOUT_VOLUME_ID &&
|
|
vol_id != UBI_FM_SB_VOLUME_ID)
|
|
return;
|
|
|
|
ubifs_sb = (struct ubifs_sb_node *)(leb_data + BE32(ech->data_offset));
|
|
ch = (struct ubifs_ch *)ubifs_sb;
|
|
if (ch->node_type != UBIFS_SB_NODE)
|
|
return;
|
|
if (ubifs_sb->flags & UBIFS_FLG_SPACE_FIXUP) {
|
|
ubifs_sb->flags &= (~UBIFS_FLG_SPACE_FIXUP);
|
|
ch->crc = mtd_crc32(UBIFS_CRC32_INIT, (void *)ubifs_sb + 8,
|
|
sizeof(struct ubifs_sb_node) - 8);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* flash_ubi_img() - Write the provided (UBI) image to given partition
|
|
* @ptn: partition to write the image to
|
|
* @data: the image to write
|
|
* @size: size of the image to write
|
|
*
|
|
* Return codes:
|
|
* -1 - in case of error
|
|
* 0 - on success
|
|
*/
|
|
int flash_ubi_img(struct ptentry *ptn, void *data, unsigned size)
|
|
{
|
|
struct ubi_scan_info *si;
|
|
struct ubi_ec_hdr *old_ech;
|
|
uint32_t curr_peb = ptn->start;
|
|
void *img_peb;
|
|
unsigned page_size = flash_page_size();
|
|
unsigned block_size = flash_block_size();
|
|
int num_pages_per_blk = block_size / page_size;
|
|
int num_pages;
|
|
int ret;
|
|
int bad_blocks_cnt = 0;
|
|
uint32_t fmsb_peb = UINT_MAX;
|
|
int is_fmsb_peb_valid = 0;
|
|
|
|
si = scan_partition(ptn);
|
|
if (!si) {
|
|
dprintf(CRITICAL, "flash_ubi_img: scan_partition failed\n");
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* In case si->vid_hdr_offs is still -1 (non UBI image was
|
|
* flashed on device, get the value from the image to flush
|
|
*/
|
|
if (!si->vid_hdr_offs){
|
|
struct ubi_ec_hdr *echd = (struct ubi_ec_hdr *)data;
|
|
si->vid_hdr_offs = BE32(echd->vid_hdr_offset);
|
|
si->data_offs = BE32(echd->data_offset);
|
|
}
|
|
|
|
/* Update the "to be" flashed image and flash it */
|
|
img_peb = data;
|
|
while (size && curr_peb < ptn->start + ptn->length) {
|
|
if (qpic_nand_blk_erase(curr_peb * num_pages_per_blk)) {
|
|
dprintf(CRITICAL, "flash_ubi_img: erase of %d failed\n",
|
|
curr_peb);
|
|
bad_blocks_cnt++;
|
|
curr_peb++;
|
|
continue;
|
|
}
|
|
remove_F_flag(img_peb);
|
|
/* Update the ec_header in the image */
|
|
old_ech = (struct ubi_ec_hdr *)img_peb;
|
|
update_ec_header(old_ech, si, curr_peb - ptn->start, false);
|
|
if (size < block_size)
|
|
num_pages = size / page_size;
|
|
else
|
|
num_pages = calc_data_len(page_size, img_peb, block_size);
|
|
/* Write one block from image */
|
|
ret = qpic_nand_write(curr_peb * num_pages_per_blk,
|
|
num_pages, img_peb, 0);
|
|
if (ret) {
|
|
dprintf(CRITICAL, "flash_ubi_img: writing to peb-%d failed\n",
|
|
curr_peb);
|
|
bad_blocks_cnt++;
|
|
curr_peb++;
|
|
continue;
|
|
}
|
|
if (size < block_size)
|
|
size = 0;
|
|
else
|
|
size -= block_size;
|
|
|
|
if (fastmap_present(img_peb)) {
|
|
fmsb_peb = curr_peb;
|
|
is_fmsb_peb_valid = 1;
|
|
}
|
|
img_peb += flash_block_size();
|
|
curr_peb++;
|
|
}
|
|
|
|
if (size) {
|
|
dprintf(CRITICAL,
|
|
"flash_ubi_img: Not enough good blocks to flash image!");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
/* Erase and write ec_header for the rest of the blocks */
|
|
for (; curr_peb < ptn->start + ptn->length; curr_peb++)
|
|
if (ubi_erase_peb(curr_peb, si, ptn->start))
|
|
bad_blocks_cnt++;
|
|
|
|
ret = 0;
|
|
/*
|
|
* If flashed image contains fastmap data and bad blocks were found
|
|
* we need to invalidate the flashed fastmap since it isn't accurate
|
|
* anymore.
|
|
*/
|
|
if (bad_blocks_cnt && (is_fmsb_peb_valid == 1)) {
|
|
dprintf(CRITICAL, "flash_ubi_img: invalidate fmsb (fmsb_peb = %u)\n",
|
|
fmsb_peb);
|
|
ret = ubi_erase_peb(fmsb_peb, si, ptn->start);
|
|
}
|
|
|
|
out:
|
|
free(si->pebs_data);
|
|
free(si);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* find_volume() - Find given volume in a partition by it's name
|
|
* @si: pointer to struct ubi_scan_info
|
|
* @ptn_start: PEB number the partition begins at
|
|
* @vol_name: name of the volume to search for
|
|
* @vol_info: info obout the found volume
|
|
*
|
|
* This functions reads the volume table, then iterates over all its records
|
|
* and searches for a volume with a given name. If found, the volume table
|
|
* record describing this volume is returned at @vol_info. The volume
|
|
* id returned as a return code of the function.
|
|
*
|
|
* Returns:
|
|
* -1 - if the volume was not found
|
|
* volume in dex when found
|
|
*/
|
|
static int find_volume(struct ubi_scan_info *si, int ptn_start,
|
|
const char *vol_name, struct ubi_vtbl_record *vol_info)
|
|
{
|
|
int i, vtbl_records, vtbl_peb, ret = -1;
|
|
int block_size = flash_block_size();
|
|
void *leb_data;
|
|
struct ubi_vtbl_record *curr_vol;
|
|
|
|
if (si->vtbl_peb1 < 0) {
|
|
dprintf(CRITICAL,"find_volume: vtbl not found \n");
|
|
return -1;
|
|
}
|
|
vtbl_peb = si->vtbl_peb1;
|
|
|
|
vtbl_records = (block_size - si->data_offs) / UBI_VTBL_RECORD_SIZE;
|
|
if (vtbl_records > UBI_MAX_VOLUMES)
|
|
vtbl_records = UBI_MAX_VOLUMES;
|
|
|
|
leb_data = malloc(block_size - si->data_offs);
|
|
if (!leb_data) {
|
|
dprintf(CRITICAL,"find_volume: Memory allocation failed\n");
|
|
goto out_free_leb;
|
|
}
|
|
retry:
|
|
/* First read the volume table */
|
|
if (read_leb_data(vtbl_peb + ptn_start, leb_data,
|
|
block_size - si->data_offs, si->data_offs)) {
|
|
dprintf(CRITICAL,"find_volume: read_leb_data failed\n");
|
|
if (vtbl_peb == si->vtbl_peb1 && si->vtbl_peb2 != -1) {
|
|
vtbl_peb = si->vtbl_peb2;
|
|
goto retry;
|
|
}
|
|
goto out_free_leb;
|
|
}
|
|
|
|
/* Now search for the required volume ID */
|
|
for (i = 0; i < vtbl_records; i++) {
|
|
curr_vol = (struct ubi_vtbl_record *)
|
|
(leb_data + UBI_VTBL_RECORD_SIZE*i);
|
|
if (!curr_vol->vol_type)
|
|
break;
|
|
if (!strcmp((char *)curr_vol->name, vol_name)) {
|
|
ret = i;
|
|
memcpy((void*)vol_info, curr_vol, sizeof(struct ubi_vtbl_record));
|
|
break;
|
|
}
|
|
}
|
|
|
|
out_free_leb:
|
|
free(leb_data);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* write_one_peb() - writes data to a PEB, including VID header
|
|
* @curr_peb - PEB to write to
|
|
* @ptn_start: number of first PEB of the partition
|
|
* @si: pointer to struct ubi_scan_info
|
|
* @idx: index of required PEB in si->pebs_data array
|
|
* @lnum: lun number this LEB belongs to
|
|
* @vol_id: volume ID this PEB belongs to
|
|
* @data: data to write
|
|
* @size: size of the data
|
|
*
|
|
* Assumption: EC header correctly written and PEB erased
|
|
*
|
|
* Return codes:
|
|
* -1 - in case of error
|
|
* 0 - on success
|
|
*/
|
|
static int write_one_peb(int curr_peb, int ptn_start,
|
|
struct ubi_scan_info *si,
|
|
int lnum, int vol_id, void* data, int size)
|
|
{
|
|
int ret;
|
|
struct ubi_vid_hdr vidh;
|
|
|
|
memset((void *)&vidh, 0, UBI_VID_HDR_SIZE);
|
|
update_vid_header(&vidh, si, vol_id, lnum, 0);
|
|
if (write_vid_header(curr_peb + ptn_start, &vidh, si->vid_hdr_offs)) {
|
|
dprintf(CRITICAL,
|
|
"update_ubi_vol: write_vid_header for peb %d failed \n",
|
|
curr_peb);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
/* now write the data */
|
|
ret = write_leb_data(curr_peb + ptn_start, data, size, si->data_offs);
|
|
if (ret)
|
|
dprintf(CRITICAL, "update_ubi_vol: writing data to peb-%d failed\n",
|
|
curr_peb);
|
|
else
|
|
si->pebs_data[curr_peb].status = UBI_USED_PEB;
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* update_ubi_vol() - Write the provided (UBI) image to given volume
|
|
* @ptn: partition holding the required volume
|
|
* @data: the image to write
|
|
* @size: size of the image to write
|
|
*
|
|
* Return codes:
|
|
* -1 - in case of error
|
|
* 0 - on success
|
|
*/
|
|
int update_ubi_vol(struct ptentry *ptn, const char* vol_name,
|
|
void *data, unsigned size)
|
|
{
|
|
struct ubi_scan_info *si;
|
|
int vol_id, vol_pebs, curr_peb = 0, ret = -1;
|
|
unsigned block_size = flash_block_size();
|
|
void *img_peb;
|
|
struct ubi_vtbl_record curr_vol;
|
|
int img_pebs, lnum = 0;
|
|
|
|
si = scan_partition(ptn);
|
|
if (!si) {
|
|
dprintf(CRITICAL, "update_ubi_vol: scan_partition failed\n");
|
|
return -1;
|
|
}
|
|
if (si->read_image_seq)
|
|
si->image_seq = si->read_image_seq;
|
|
|
|
vol_id = find_volume(si, ptn->start, vol_name, &curr_vol);
|
|
if (vol_id == -1) {
|
|
dprintf(CRITICAL, "update_ubi_vol: dint find volume\n");
|
|
goto out;
|
|
}
|
|
if (si->fastmap_sb > -1 &&
|
|
ubi_erase_peb(ptn->start + si->fastmap_sb, si, ptn->start)) {
|
|
dprintf(CRITICAL, "update_ubi_vol: fastmap invalidation failed\n");
|
|
goto out;
|
|
}
|
|
|
|
img_pebs = size / (block_size - si->data_offs);
|
|
if (size % (block_size - si->data_offs))
|
|
img_pebs++;
|
|
|
|
vol_pebs = BE32(curr_vol.reserved_pebs);
|
|
if (img_pebs > vol_pebs) {
|
|
dprintf(CRITICAL,
|
|
"update_ubi_vol: Provided image is too big. Requires %d PEBs, avail. only %d\n",
|
|
img_pebs, vol_pebs);
|
|
goto out;
|
|
}
|
|
|
|
/* First erase all volume used PEBs */
|
|
curr_peb = 0;
|
|
while (curr_peb < (int)ptn->length) {
|
|
if (si->pebs_data[curr_peb].status != UBI_USED_PEB ||
|
|
si->pebs_data[curr_peb].volume != vol_id) {
|
|
curr_peb++;
|
|
continue;
|
|
}
|
|
if (ubi_erase_peb(ptn->start + curr_peb, si, ptn->start))
|
|
goto out;
|
|
curr_peb++;
|
|
}
|
|
|
|
/* Flash the image */
|
|
img_peb = data;
|
|
lnum = 0;
|
|
for (curr_peb = 0;
|
|
curr_peb < (int)ptn->length && size && vol_pebs;
|
|
curr_peb++) {
|
|
if (si->pebs_data[curr_peb].status != UBI_FREE_PEB &&
|
|
si->pebs_data[curr_peb].status != UBI_EMPTY_PEB)
|
|
continue;
|
|
|
|
if (write_one_peb(curr_peb, ptn->start, si,
|
|
lnum++, vol_id, img_peb,
|
|
(size < block_size - si->data_offs ? size :
|
|
block_size - si->data_offs))) {
|
|
dprintf(CRITICAL, "update_ubi_vol: write_one_peb failed\n");
|
|
goto out;
|
|
}
|
|
if (size < block_size - si->data_offs)
|
|
size = 0;
|
|
else
|
|
size -= (block_size - si->data_offs);
|
|
vol_pebs--;
|
|
img_peb += block_size - si->data_offs;
|
|
}
|
|
|
|
if (size) {
|
|
dprintf(CRITICAL,
|
|
"update_ubi_vol: Not enough available PEBs for writing the volume\n");
|
|
goto out;
|
|
}
|
|
ret = 0;
|
|
out:
|
|
free(si->pebs_data);
|
|
free(si);
|
|
return ret;
|
|
}
|
|
|
|
|