[v2] erofs: add sysfs feature entry for xattr prefixes

[PATCH v2] erofs: add sysfs feature entry for xattr prefixes

Posted by Jingbo Xu 3 weeks, 4 days ago

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

Fixes: 6a318ccd7e08 ("erofs: enable long extended attribute name prefixes")
Cc: <stable@vger.kernel.org> # 6.4+
Signed-off-by: Jingbo Xu <jefflexu@linux.alibaba.com>
---
changes since v1:
- add Fixes tag and versioned Cc-stable tag
---
 fs/erofs/sysfs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/erofs/sysfs.c b/fs/erofs/sysfs.c
index 6734483a440f..dfcec9376cd5 100644
--- a/fs/erofs/sysfs.c
+++ b/fs/erofs/sysfs.c
@@ -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,
-- 
2.19.1.6.gb485710b

Re: [PATCH v2] erofs: add sysfs feature entry for xattr prefixes

Posted by Gao Xiang 3 weeks, 4 days ago

On Tue, Sep 01, 2026 at 02:22:43PM +0800, Jingbo Xu wrote:
> Let /sys/fs/erofs/features/xattr_prefixes advertise that this kernel
> supports the EROFS_FEATURE_INCOMPAT_XATTR_PREFIXES on-disk format.
> 
> Fixes: 6a318ccd7e08 ("erofs: enable long extended attribute name prefixes")
> Cc: <stable@vger.kernel.org> # 6.4+
> Signed-off-by: Jingbo Xu <jefflexu@linux.alibaba.com>

Reviewed-by: Gao Xiang <xiang@kernel.org>

Thanks,
Gao Xiang