ext4: prevent fsreentrance deadlock for inline_data
ext4_da_convert_inline_data_to_extent() invokes grab_cache_page_write_begin(). grab_cache_page_write_begin performs memory allocation, so fs-reentrance should be prohibited because we are inside journal transaction. Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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@ -870,6 +870,12 @@ retry_journal:
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goto out_journal;
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goto out_journal;
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}
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}
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/*
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* We cannot recurse into the filesystem as the transaction
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* is already started.
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*/
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flags |= AOP_FLAG_NOFS;
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if (ret == -ENOSPC) {
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if (ret == -ENOSPC) {
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ret = ext4_da_convert_inline_data_to_extent(mapping,
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ret = ext4_da_convert_inline_data_to_extent(mapping,
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inode,
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inode,
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@ -882,11 +888,6 @@ retry_journal:
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goto out;
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goto out;
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}
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}
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/*
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* We cannot recurse into the filesystem as the transaction
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* is already started.
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*/
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flags |= AOP_FLAG_NOFS;
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page = grab_cache_page_write_begin(mapping, 0, flags);
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page = grab_cache_page_write_begin(mapping, 0, flags);
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if (!page) {
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if (!page) {
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