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erofs: using domain_id in the safer way

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Either the existing fscache usecase or the upcoming page
cache sharing case, the `domain_id` should be protected as
sensitive information, so we use the safer helpers to allocate,
free and display domain_id.

Signed-off-by: Hongbo Li <lihongbo22@huawei.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
This commit is contained in:
Hongbo Li
2026-01-23 01:31:27 +00:00
committed by Gao Xiang
parent 78331814a5
commit e77762e896
3 changed files with 9 additions and 10 deletions
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5
Documentation/filesystems/erofs.rst
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@@ -128,8 +128,9 @@ device=%s Specify a path to an extra device to be used together.
directio (For file-backed mounts) Use direct I/O to access backing
files, and asynchronous I/O will be enabled if supported.
fsid=%s Specify a filesystem image ID for Fscache back-end.
domain_id=%s Specify a domain ID in fscache mode so that different images
with the same blobs under a given domain ID can share storage.
domain_id=%s Specify a trusted domain ID for fscache mode so that
different images with the same blobs, identified by blob IDs,
can share storage within the same trusted domain.
fsoffset=%llu Specify block-aligned filesystem offset for the primary device.
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