mirror of
https://github.com/eledio-devices/thirdparty-littlefs.git
synced 2025-10-31 08:42:40 +01:00
fd1da602d7
This provides a limited form of wear leveling. While wear is not actually balanced across blocks, the filesystem can recover from corrupted blocks and extend the lifetime of a device nearly as much as dynamic wear leveling. For use-cases where wear is important, it would be better to use a full form of dynamic wear-leveling at the block level. (or consider a logging filesystem). Corrupted block handling was simply added on top of the existing logic in place for the filesystem, so it's a bit more noodly than it may have to be, but it gets the work done.
106 lines
2.0 KiB
Plaintext
106 lines
2.0 KiB
Plaintext
/// AUTOGENERATED TEST ///
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#include "lfs.h"
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#include "emubd/lfs_emubd.h"
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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// test stuff
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void test_log(const char *s, uintmax_t v) {{
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printf("%s: %jd\n", s, v);
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}}
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void test_assert(const char *file, unsigned line,
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const char *s, uintmax_t v, uintmax_t e) {{
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static const char *last[6] = {{0, 0}};
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if (v != e || !(last[0] == s || last[1] == s ||
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last[2] == s || last[3] == s ||
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last[4] == s || last[5] == s)) {{
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test_log(s, v);
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last[0] = last[1];
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last[1] = last[2];
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last[2] = last[3];
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last[3] = last[4];
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last[4] = last[5];
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last[5] = s;
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}}
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if (v != e) {{
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printf("\033[31m%s:%u: assert %s failed, expected %jd\033[0m\n",
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file, line, s, e);
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exit(-2);
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}}
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}}
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#define test_assert(s, v, e) test_assert(__FILE__, __LINE__, s, v, e)
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// utility functions for traversals
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int test_count(void *p, lfs_block_t b) {{
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unsigned *u = (unsigned*)p;
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*u += 1;
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return 0;
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}}
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// lfs declarations
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lfs_t lfs;
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lfs_emubd_t bd;
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lfs_file_t file[4];
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lfs_dir_t dir[4];
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struct lfs_info info;
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uint8_t buffer[1024];
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uint8_t wbuffer[1024];
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uint8_t rbuffer[1024];
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lfs_size_t size;
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lfs_size_t wsize;
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lfs_size_t rsize;
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uintmax_t res;
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#ifndef LFS_READ_SIZE
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#define LFS_READ_SIZE 64
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#endif
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#ifndef LFS_PROG_SIZE
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#define LFS_PROG_SIZE 64
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#endif
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#ifndef LFS_BLOCK_SIZE
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#define LFS_BLOCK_SIZE 512
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#endif
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#ifndef LFS_BLOCK_COUNT
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#define LFS_BLOCK_COUNT 1024
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#endif
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#ifndef LFS_LOOKAHEAD
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#define LFS_LOOKAHEAD 128
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#endif
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const struct lfs_config cfg = {{
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.context = &bd,
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.read = &lfs_emubd_read,
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.prog = &lfs_emubd_prog,
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.erase = &lfs_emubd_erase,
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.sync = &lfs_emubd_sync,
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.read_size = LFS_READ_SIZE,
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.prog_size = LFS_PROG_SIZE,
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.block_size = LFS_BLOCK_SIZE,
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.block_count = LFS_BLOCK_COUNT,
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.lookahead = LFS_LOOKAHEAD,
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}};
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// Entry point
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int main() {{
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lfs_emubd_create(&cfg, "blocks");
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{tests}
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lfs_emubd_destroy(&cfg);
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}}
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