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| author |  Gao Xiang <hsiangkao@linux.alibaba.com>
| 2022-09-23 09:49:15 +0800 |
|---|---|---|
| committer | Gao Xiang <hsiangkao@linux.alibaba.com>
| 2022-09-26 23:55:43 +0800 |
| commit | 5c2a64252c5dc4cfe78e5b2a531c118894e3d155 (patch) | |
| tree | 356748bce348364c288493b9eeb9de8994b1a95e /fs/erofs/zdata.c | |
| parent | erofs: support on-disk compressed fragments data (diff) | |
| download | linux-5c2a64252c5dc4cfe78e5b2a531c118894e3d155.tar.gz linux-5c2a64252c5dc4cfe78e5b2a531c118894e3d155.tar.bz2 linux-5c2a64252c5dc4cfe78e5b2a531c118894e3d155.zip | |
erofs: introduce partial-referenced pclusters
Due to deduplication for compressed data, pclusters can be partially
referenced with their prefixes.
Together with the user-space implementation, it enables EROFS
variable-length global compressed data deduplication with rolling
hash.
Link: https://lore.kernel.org/r/20220923014915.4362-1-hsiangkao@linux.alibaba.com
Reviewed-by: Yue Hu <huyue2@coolpad.com>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Diffstat (limited to 'fs/erofs/zdata.c')
| -rw-r--r-- | fs/erofs/zdata.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c index c92a72f5bca6..cce56dde135c 100644 --- a/fs/erofs/zdata.c +++ b/fs/erofs/zdata.c @@ -814,6 +814,7 @@ retry: fe->pcl->multibases = true; if ((map->m_flags & EROFS_MAP_FULL_MAPPED) && + !(map->m_flags & EROFS_MAP_PARTIAL_REF) && fe->pcl->length == map->m_llen) fe->pcl->partial = false; if (fe->pcl->length < offset + end - map->m_la) { |