69a8877e82
Length of xattr descriptor is equal to length of xattr struct, xattr name and the len of stored value. There is no limit to how much can be stored in memory for xattr. On disk xattr size is limited to single page and within that to max descriptors that can fit in it. This size is known at compile time. Before this patch it was possible to add xattr exceeding what was possible to be written to disk. This caused issues when serializing the metadata during spdk_blob_sync_md() or spdk_blob_close(). Making those fail without specific info to the user and not actually writting such descriptor. Since maximum length of xattr descriptor is known at compile time, this patch compares against this value when setting the xattr. It will immediately report back to user with error, and will not store xattr in memory (thus not serialize it). This patch should not affect any backward compatibility for blobs. Too large xattrs weren't written to disk before, API for blobstore stays the same - only reporting ENOMEM when it should. Signed-off-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com> Change-Id: I6f4af4d079e47f084e20d7a4969d9a78ec1f8610 Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/460450 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com> Reviewed-by: Maciej Szwed <maciej.szwed@intel.com> Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com> Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com> |
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| unittest.sh | ||