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erofs: enable 48-bit layout support

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Both 48-bit block addressing and encoded extents are implemented,
let's enable them formally.

Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Acked-by: Chao Yu <chao@kernel.org>
Link: https://lore.kernel.org/r/20250310095625.2623817-1-hsiangkao@linux.alibaba.com
This commit is contained in:
Gao Xiang 2025-03-10 17:56:25 +08:00
parent 7361d1e376
commit 0f24e3c05a
3 changed files with 10 additions and 8 deletions
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14
fs/erofs/Kconfig
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@ -13,12 +13,12 @@ config EROFS_FS
smartphones with Android OS, LiveCDs and high-density hosts with
numerous containers;
It also provides fixed-sized output compression support in order to
improve storage density as well as keep relatively higher compression
ratios and implements in-place decompression to reuse the file page
for compressed data temporarily with proper strategies, which is
quite useful to ensure guaranteed end-to-end runtime decompression
performance under extremely memory pressure without extra cost.
It also provides transparent compression and deduplication support to
improve storage density and maintain relatively high compression
ratios, and it implements in-place decompression to temporarily reuse
page cache for compressed data using proper strategies, which is
quite useful for ensuring guaranteed end-to-end runtime decompression
performance under extreme memory pressure without extra cost.
See the documentation at <file:Documentation/filesystems/erofs.rst>
and the web pages at <https://erofs.docs.kernel.org> for more details.
@ -97,7 +97,7 @@ config EROFS_FS_ZIP
select LZ4_DECOMPRESS
default y
help
Enable fixed-sized output compression for EROFS.
Enable transparent compression support for EROFS file systems.
If you don't want to enable compression feature, say N.

2
fs/erofs/erofs_fs.h
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@ -32,7 +32,7 @@
#define EROFS_FEATURE_INCOMPAT_XATTR_PREFIXES 0x00000040
#define EROFS_FEATURE_INCOMPAT_48BIT 0x00000080
#define EROFS_ALL_FEATURE_INCOMPAT \
((EROFS_FEATURE_INCOMPAT_XATTR_PREFIXES << 1) - 1)
((EROFS_FEATURE_INCOMPAT_48BIT << 1) - 1)
#define EROFS_SB_EXTSLOT_SIZE 16

2
fs/erofs/super.c
View File

@ -330,6 +330,8 @@ static int erofs_read_superblock(struct super_block *sb)
/* handle multiple devices */
ret = erofs_scan_devices(sb, dsb);
if (erofs_sb_has_48bit(sbi))
erofs_info(sb, "EXPERIMENTAL 48-bit layout support in use. Use at your own risk!");
if (erofs_is_fscache_mode(sb))
erofs_info(sb, "[deprecated] fscache-based on-demand read feature in use. Use at your own risk!");
out: