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littlefs: add a few Kconfig options

This commit is contained in:
YAMAMOTO Takashi 2022-12-01 21:28:38 +09:00 committed by Xiang Xiao
parent a43af6563b
commit 8ee2ed0b91
2 changed files with 53 additions and 1 deletions
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50
fs/littlefs/Kconfig
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@ -17,4 +17,54 @@ config FS_LITTLEFS_BLOCK_CYCLE
default 200
---help---
Configure the block cycle of the LITTLEFS file system.
config FS_LITTLEFS_NAME_MAX
int "LITTLEFS LFS_NAME_MAX"
default NAME_MAX
---help---
Configure LFS_NAME_MAX value for LITTLEFS file systems.
Note: Using a larger value for this configuration makes the lfs_info
structure larger and thus increases the stack usage.
Note: To mount a LITTLEFS filesystem, this configuration should
equal to or larger than the corresponding on-disk parameter.
Note: Many of tools to generate LITTLEFS images use 255 for
this by default.
Note: NuttX releases prior to 10.4.0 (exclusive) uses 255
for this. If you need to mount LITTLEFS filesystems used by
previous versions of NuttX, it's safer to use 255.
config FS_LITTLEFS_FILE_MAX
int "LITTLEFS LFS_FILE_MAX"
default 2147483647
---help---
Configure LFS_FILE_MAX value for LITTLEFS file systems.
Note: To mount a LITTLEFS filesystem, this configuration should
equal to or larger than the corresponding on-disk parameter.
Note: Many of tools to generate LITTLEFS images use 2147483647
for this by default.
config FS_LITTLEFS_ATTR_MAX
int "LITTLEFS LFS_ATTR_MAX"
default 1022
---help---
Configure LFS_ATTR_MAX value for LITTLEFS file systems.
Note: To mount a LITTLEFS filesystem, this configuration should
equal to or larger than the corresponding on-disk parameter.
Note: because NuttX's LITTLEFS driver does never use custom attributes,
the value of this configuration doesn't matter much. The default value
here is chosen to be compatible with filesystems created by external
tools. Unlike LFS_NAME_MAX, a large LFS_ATTR_MAX value doesn't
have any runtime overhead, at least with the implementation as of
writing this.
Note: Many of tools to generate LITTLEFS images use 1022
for this by default.
endif

4
fs/littlefs/Make.defs
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@ -37,7 +37,9 @@ CFLAGS += -DLFS_WARN=fwarn
CFLAGS += -DLFS_ERROR=ferr
CFLAGS += -DLFS_ASSERT=DEBUGASSERT
CFLAGS += -DLFS_CONFIG=../lfs_vfs.h
CFLAGS += -DLFS_NAME_MAX=$(CONFIG_NAME_MAX)
CFLAGS += -DLFS_NAME_MAX=$(CONFIG_FS_LITTLEFS_NAME_MAX)
CFLAGS += -DLFS_FILE_MAX=$(CONFIG_FS_LITTLEFS_FILE_MAX)
CFLAGS += -DLFS_ATTR_MAX=$(CONFIG_FS_LITTLEFS_ATTR_MAX)
LITTLEFS_VERSION ?= 2.4.0
LITTLEFS_TARBALL = v$(LITTLEFS_VERSION).tar.gz