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.../msg00149.html >> >> -* More NBD protocol features. The only currently missing feature is >> - online resize. >> +* More NBD protocol features. The only currently missing features are >> + sparse reads and online resize. >> This resets the change from commit 26455d452574, probably unintentionally? >> * Add a callback to let plugins request minimum alignment for the >> buffer to pread/pwrite; useful for a plugin utilizing O_DIRECT or >> @@ -216,7 +216,11 @@ using ‘#define NBDKIT_API_VERSION <version>’. >> >> * pread could be...

...t;> -* More NBD protocol features.  The only currently missing feature is >>> -  online resize. >>> +* More NBD protocol features.  The only currently missing features are >>> +  sparse reads and online resize. >>> > > This resets the change from commit 26455d452574, probably unintentionally? The earlier commit had: -* More NBD protocol features. In the upstream pipeline: proposals for - block status and online resize. +* More NBD protocol features. The only currently missing feature is + online resize. We implemented block status (which can indirectly b...

The DF flag is only available to clients that negotiated structured replies, and even then, the spec does not require that it be implemented. However, since our current implementation can't fragment NBD_CMD_READ replies, we trivially implement the flag (by ignoring it); we don't even have to pass it on to the plugins. Enhance some documentation about sparse reads while at it (when we