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Added support for writing on-disk version lfs2.0

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The intention is to help interop with older minor versions of littlefs.

Unfortunately, since lfs2.0 drivers cannot mount lfs2.1 images, there are
situations where it would be useful to write to write strictly lfs2.0
compatible images. The solution here adds a "disk_version" configuration
option which determines the behavior of lfs2.1 dependent features.

Normally you would expect this to only change write behavior. But since the
main change in lfs2.1 increased validation of erased data, we also need to
skip this extra validation (fcrc) or see terrible slowdowns when writing.
This commit is contained in:
Christopher Haster
2023-06-07 02:03:31 -05:00
parent 265692e709
commit b72c96d440
7 changed files with 169 additions and 61 deletions
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5
runners/test_runner.c
View File

@@ -1346,6 +1346,7 @@ static void run_powerloss_none(
.block_cycles = BLOCK_CYCLES,
.cache_size = CACHE_SIZE,
.lookahead_size = LOOKAHEAD_SIZE,
.disk_version = DISK_VERSION,
};
struct lfs_emubd_config bdcfg = {
@@ -1415,6 +1416,7 @@ static void run_powerloss_linear(
.block_cycles = BLOCK_CYCLES,
.cache_size = CACHE_SIZE,
.lookahead_size = LOOKAHEAD_SIZE,
.disk_version = DISK_VERSION,
};
struct lfs_emubd_config bdcfg = {
@@ -1501,6 +1503,7 @@ static void run_powerloss_log(
.block_cycles = BLOCK_CYCLES,
.cache_size = CACHE_SIZE,
.lookahead_size = LOOKAHEAD_SIZE,
.disk_version = DISK_VERSION,
};
struct lfs_emubd_config bdcfg = {
@@ -1585,6 +1588,7 @@ static void run_powerloss_cycles(
.block_cycles = BLOCK_CYCLES,
.cache_size = CACHE_SIZE,
.lookahead_size = LOOKAHEAD_SIZE,
.disk_version = DISK_VERSION,
};
struct lfs_emubd_config bdcfg = {
@@ -1767,6 +1771,7 @@ static void run_powerloss_exhaustive(
.block_cycles = BLOCK_CYCLES,
.cache_size = CACHE_SIZE,
.lookahead_size = LOOKAHEAD_SIZE,
.disk_version = DISK_VERSION,
};
struct lfs_emubd_config bdcfg = {

7
runners/test_runner.h
View File

@@ -91,6 +91,7 @@ intmax_t test_define(size_t define);
#define ERASE_CYCLES_i 8
#define BADBLOCK_BEHAVIOR_i 9
#define POWERLOSS_BEHAVIOR_i 10
#define DISK_VERSION_i 11
#define READ_SIZE TEST_DEFINE(READ_SIZE_i)
#define PROG_SIZE TEST_DEFINE(PROG_SIZE_i)
@@ -103,6 +104,7 @@ intmax_t test_define(size_t define);
#define ERASE_CYCLES TEST_DEFINE(ERASE_CYCLES_i)
#define BADBLOCK_BEHAVIOR TEST_DEFINE(BADBLOCK_BEHAVIOR_i)
#define POWERLOSS_BEHAVIOR TEST_DEFINE(POWERLOSS_BEHAVIOR_i)
#define DISK_VERSION TEST_DEFINE(DISK_VERSION_i)
#define TEST_IMPLICIT_DEFINES \
TEST_DEF(READ_SIZE, PROG_SIZE) \
@@ -115,9 +117,10 @@ intmax_t test_define(size_t define);
TEST_DEF(ERASE_VALUE, 0xff) \
TEST_DEF(ERASE_CYCLES, 0) \
TEST_DEF(BADBLOCK_BEHAVIOR, LFS_EMUBD_BADBLOCK_PROGERROR) \
TEST_DEF(POWERLOSS_BEHAVIOR, LFS_EMUBD_POWERLOSS_NOOP)
TEST_DEF(POWERLOSS_BEHAVIOR, LFS_EMUBD_POWERLOSS_NOOP) \
TEST_DEF(DISK_VERSION, 0)
#define TEST_IMPLICIT_DEFINE_COUNT 11
#define TEST_IMPLICIT_DEFINE_COUNT 12
#define TEST_GEOMETRY_DEFINE_COUNT 4