Both 48-bit block addressing and encoded extents are implemented,
let's enable them formally.
Signed-off-by: Gao Xiang <hsiang...@linux.alibaba.com>
---
fs/erofs/Kconfig | 14 +++++++-------
fs/erofs/erofs_fs.h | 2 +-
fs/erofs/super.c | 2 ++
3 files changed, 10 insertions(+), 8 deletions(-)
diff --git a/fs/erofs/Kconfig b/fs/erofs/Kconfig
index 6ea60661fa55..331e49cd1b8d 100644
--- a/fs/erofs/Kconfig
+++ b/fs/erofs/Kconfig
@@ -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.
diff --git a/fs/erofs/erofs_fs.h b/fs/erofs/erofs_fs.h
index 6d461be790bd..9581e9bf8192 100644
--- a/fs/erofs/erofs_fs.h
+++ b/fs/erofs/erofs_fs.h
@@ -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
diff --git a/fs/erofs/super.c b/fs/erofs/super.c
index 0156ee7217c9..a8fc75fd1c74 100644
--- a/fs/erofs/super.c
+++ b/fs/erofs/super.c
@@ -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:
--
2.43.5
