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erofs: add sysfs feature entry for xattr prefixes

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Let /sys/fs/erofs/features/xattr_prefixes advertise that this kernel
supports the EROFS_FEATURE_INCOMPAT_XATTR_PREFIXES on-disk format.

Fixes: 6a318ccd7e ("erofs: enable long extended attribute name prefixes")
Cc: stable@vger.kernel.org # 6.4+
Reviewed-by: Gao Xiang <xiang@kernel.org>
Signed-off-by: Jingbo Xu <jefflexu@linux.alibaba.com>
Signed-off-by: Gao Xiang <xiang@kernel.org>
This commit is contained in:
Jingbo Xu 2026-09-02 09:50:39 +08:00 committed by Gao Xiang
parent cee9395acd
commit 839f075aab
2 changed files with 3 additions and 1 deletions
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2
Documentation/ABI/testing/sysfs-fs-erofs
View File

@ -5,7 +5,7 @@ Description: Shows all enabled kernel features.
Supported features:
compr_cfgs, big_pcluster, chunked_file, device_table,
compr_head2, sb_chksum, ztailpacking, dedupe, fragments,
48bit, metabox.
xattr_prefixes, 48bit, metabox.
What: /sys/fs/erofs/<disk>/sync_decompress
Date: November 2021

2
fs/erofs/sysfs.c
View File

@ -95,6 +95,7 @@ EROFS_ATTR_FEATURE(sb_chksum);
EROFS_ATTR_FEATURE(ztailpacking);
EROFS_ATTR_FEATURE(fragments);
EROFS_ATTR_FEATURE(dedupe);
EROFS_ATTR_FEATURE(xattr_prefixes);
EROFS_ATTR_FEATURE(48bit);
EROFS_ATTR_FEATURE(metabox);
@ -108,6 +109,7 @@ static struct attribute *erofs_feat_attrs[] = {
ATTR_LIST(ztailpacking),
ATTR_LIST(fragments),
ATTR_LIST(dedupe),
ATTR_LIST(xattr_prefixes),
ATTR_LIST(48bit),
ATTR_LIST(metabox),
NULL,