erofs: add sysfs feature entry for xattr prefixes

PATCH Superseded Jingbo Xu 2 participants 2 messages Sep 1 EROFS file system

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Jingbo Xu

author

2026-09-01 02:46 UTC #0 lore raw

PATCH 1/1 erofs: add sysfs feature entry for xattr prefixes

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

Signed-off-by Jingbo Xu <[email protected]>

---
 fs/erofs/sysfs.c | 2 ++
 1 file changed, 2 insertions(+)

fs/erofs/sysfs.c +2 -0

index 6734483a440f..dfcec9376cd5 100644
@@ -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,

Signature · 1 line

2.19.1.6.gb485710b

Gao Xiang

maintainer

2026-09-01 05:59 UTC #1 lore raw

Hi Jingbo,

Quoted 4 lines · Jingbo Xu

Let /sys/fs/erofs/features/xattr_prefixes advertise that this kernel supports the EROFS_FEATURE_INCOMPAT_XATTR_PREFIXES on-disk format.
Signed-off-by Jingbo Xu <[email protected]>

It'd be better to add a "Fixes:" tag since it should be backported by the stable kernels which have this feature.

Also it'd also be better to mention the first impacted kernel version in the commit message too.

Thanks,
Gao Xiang