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Commitc510061

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jmarcoscostatrini
authored andcommitted
fs/squashfs: new filesystem
Add support for SquashFS filesystem. Right now, it does not supportcompression but support for zlib will be added in a follow-up commit.Signed-off-by: Joao Marcos Costa <joaomarcos.costa@bootlin.com>
1 parent550a9e7 commitc510061

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‎MAINTAINERS

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@@ -969,6 +969,12 @@ S:Maintained
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F:drivers/spmi/
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F:include/spmi/
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SQUASHFS
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M:Joao Marcos Costa <joaomarcos.costa@bootlin.com>
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S:Maintained
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F:fs/squashfs/
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F:include/sqfs.h
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TARGET_BCMNS3
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M:Bharat Gooty <bharat.gooty@broadcom.com>
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M:Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>

‎common/spl/Kconfig

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@@ -577,6 +577,15 @@ config SPL_FS_EXT4
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filesystem from within SPL. Support for the underlying block
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device (e.g. MMC or USB) must be enabled separately.
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config SPL_FS_SQUASHFS
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bool "Support SquashFS filesystems"
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select FS_SQUASHFS
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help
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Enable support for SquashFS filesystems with SPL. This permits
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U-Boot (or Linux in Falcon mode) to be loaded from a SquashFS
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filesystem from within SPL. Support for the underlying block
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device (e.g. MMC or USB) must be enabled separately.
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config SPL_FS_FAT
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bool "Support FAT filesystems"
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select FS_FAT

‎fs/Kconfig

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@@ -22,4 +22,6 @@ source "fs/cramfs/Kconfig"
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source "fs/yaffs2/Kconfig"
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source "fs/squashfs/Kconfig"
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endmenu

‎fs/Makefile

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@@ -9,6 +9,7 @@ obj-$(CONFIG_FS_LOADER) += fs.o
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obj-$(CONFIG_SPL_FS_FAT) += fat/
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obj-$(CONFIG_SPL_FS_EXT4) += ext4/
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obj-$(CONFIG_SPL_FS_CBFS) += cbfs/
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obj-$(CONFIG_SPL_FS_SQUASHFS) += squashfs/
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else
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obj-y+= fs.o
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@@ -23,5 +24,6 @@ obj-$(CONFIG_SANDBOX) += sandbox/
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obj-$(CONFIG_CMD_UBIFS) += ubifs/
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obj-$(CONFIG_YAFFS2) += yaffs2/
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obj-$(CONFIG_CMD_ZFS) += zfs/
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obj-$(CONFIG_FS_SQUASHFS) += squashfs/
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endif
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obj-y += fs_internal.o

‎fs/fs.c

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#include<div64.h>
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#include<linux/math64.h>
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#include<efi_loader.h>
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#include<squashfs.h>
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DECLARE_GLOBAL_DATA_PTR;
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@@ -276,6 +277,20 @@ static struct fstype_info fstypes[] = {
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.mkdir=fs_mkdir_unsupported,
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.ln=fs_ln_unsupported,
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},
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#endif
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#ifIS_ENABLED(CONFIG_FS_SQUASHFS)
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{
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.fstype=FS_TYPE_SQUASHFS,
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.name="squashfs",
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.probe=sqfs_probe,
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.opendir=sqfs_opendir,
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.readdir=sqfs_readdir,
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.ls=fs_ls_generic,
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.read=sqfs_read,
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.size=sqfs_size,
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.close=sqfs_close,
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.closedir=sqfs_closedir,
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},
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#endif
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{
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.fstype=FS_TYPE_ANY,

‎fs/squashfs/Kconfig

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config FS_SQUASHFS
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bool "Enable SquashFS filesystem support"
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help
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This provides support for reading images from SquashFS filesystem.
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Squashfs is a compressed read-only filesystem for Linux.
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It uses zlib, lz4, lzo, or xz compression to compress files, inodes
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and directories. Squashfs is intended for general read-only
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filesystem use, for archival use (i.e. in cases where a .tar.gz file
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may be used), and in constrained block device/memory systems (e.g.
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embedded systems) where low overhead is needed.

‎fs/squashfs/Makefile

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# SPDX-License-Identifier: GPL-2.0+
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#
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obj-$(CONFIG_$(SPL_)FS_SQUASHFS) = sqfs.o\
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sqfs_inode.o\
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sqfs_dir.o\
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sqfs_decompressor.o

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