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Add capability of prefetch for rafs v6 format #319

Merged
merged 8 commits into from
Mar 10, 2022
Merged

Add capability of prefetch for rafs v6 format #319

merged 8 commits into from
Mar 10, 2022

Commits on Mar 10, 2022

  1. nydus-image: persist v6 prefetch table to extended super block 

    Place a prefetch table which has nids for files and directories that
needs to be prefetched. The prefetch table is very close to blobs
table on v6 rafs extended super block.

Signed-off-by: Changwei Ge <chge@linux.alibaba.com>
    @changweige
    changweige committed Mar 10, 2022
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  2. rafs/v6: implement is_hardlink() for v6 format 

    Signed-off-by: Changwei Ge <chge@linux.alibaba.com>
    @changweige
    changweige committed Mar 10, 2022
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  3. rafs/v6: perform prefetch based on v6 super block 

    Load v6 prefetch table from extended super block and
prefetch files' contents per as the table.

Signed-off-by: Changwei Ge <chge@linux.alibaba.com>
    @changweige
    changweige committed Mar 10, 2022
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  4. nydus-image: rename seek_to_offset to seek_offset 

    Because seek is transitive.

Signed-off-by: Changwei Ge <chge@linux.alibaba.com>
    @changweige
    changweige committed Mar 10, 2022
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  5. rafs/v6: implement collect_descendants_inodes() for rafs v6 

    Rafs prefetch needs the functionality.

Signed-off-by: Changwei Ge <chge@linux.alibaba.com>
    @changweige
    changweige committed Mar 10, 2022
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  6. rafs/storage: map to blob addressable chunk infos 

    V6 format does not have chunks' particualer addresses
in bootstrap but only their indexes by which to locate each
chunk from blob.
For prefetch, we aslo have to map the chunks info so that
bios can be sorted when handling prefetch requests.

Signed-off-by: Changwei Ge <chge@linux.alibaba.com>
    @changweige
    changweige committed Mar 10, 2022
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  7. rafs: use real root ino when perform dynamic prefetch 

    Signed-off-by: Changwei Ge <chge@linux.alibaba.com>
    @changweige
    changweige committed Mar 10, 2022
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  8. nydus-image: only write extended sb once 

    Right now, when prefetch enabled and xattrs packed,
extended sb will be revised and rewritten more than
onece. It is not necessary.

Only write extended block when all the settings are
done.

Signed-off-by: Changwei Ge <chge@linux.alibaba.com>
    @changweige
    changweige committed Mar 10, 2022
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