forked from luck/tmp_suning_uos_patched
Btrfs: fix compressed write corruption on enospc
When failing to allocate space for the whole compressed extent, we'll fallback to uncompressed IO, but we've forgotten to redirty the pages which belong to this compressed extent, and these 'clean' pages will simply skip 'submit' part and go to endio directly, at last we got data corruption as we write nothing. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Tested-By: Martin Steigerwald <martin@lichtvoll.de> Signed-off-by: Chris Mason <clm@fb.com>
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ce62003f69
@ -709,6 +709,18 @@ static noinline int submit_compressed_extents(struct inode *inode,
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unlock_extent(io_tree, async_extent->start,
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async_extent->start +
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async_extent->ram_size - 1);
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/*
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* we need to redirty the pages if we decide to
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* fallback to uncompressed IO, otherwise we
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* will not submit these pages down to lower
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* layers.
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*/
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extent_range_redirty_for_io(inode,
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async_extent->start,
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async_extent->start +
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async_extent->ram_size - 1);
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goto retry;
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}
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goto out_free;
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