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author | Gao Xiang <xiang@kernel.org> | 2021-05-10 14:47:15 +0800 |
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committer | Gao Xiang <xiang@kernel.org> | 2021-05-13 15:58:46 +0800 |
commit | 0852b6ca941ef3ff75076e85738877bd3271e1cd (patch) | |
tree | 776b4b7bdce0a469fb198985260af221ff188c5e /fs/ufs/ufs_fs.h | |
parent | 46f2e04484aee056c97f79162da83ac7d2d621bb (diff) |
erofs: fix 1 lcluster-sized pcluster for big pcluster
If the 1st NONHEAD lcluster of a pcluster isn't CBLKCNT lcluster type
rather than a HEAD or PLAIN type instead, which means its pclustersize
_must_ be 1 lcluster (since its uncompressed size < 2 lclusters),
as illustrated below:
HEAD HEAD / PLAIN lcluster type
____________ ____________
|_:__________|_________:__| file data (uncompressed)
. .
.____________.
|____________| pcluster data (compressed)
Such on-disk case was explained before [1] but missed to be handled
properly in the runtime implementation.
It can be observed if manually generating 1 lcluster-sized pcluster
with 2 lclusters (thus CBLKCNT doesn't exist.) Let's fix it now.
[1] https://lore.kernel.org/r/20210407043927.10623-1-xiang@kernel.org
Link: https://lore.kernel.org/r/20210510064715.29123-1-xiang@kernel.org
Fixes: cec6e93beadf ("erofs: support parsing big pcluster compress indexes")
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Gao Xiang <xiang@kernel.org>
Diffstat (limited to 'fs/ufs/ufs_fs.h')
0 files changed, 0 insertions, 0 deletions