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2022 Dec 16
1
[PATCH v2 1/6] spec: Recommend cap on NBD_REPLY_TYPE_BLOCK_STATUS length
...e extent. Later, when adding its > qemu:dirty-bitmap:XYZ context extension (qemu commit 3d068aff16, Jun > 2018), it added a cap to 128k extents (1M+4 bytes), and that cap was > applied to base:allocation once qemu started sending multiple extents > for that context as well (qemu commit fb7afc797e, Jul 2018). Qemu > extents are never smaller than 512 bytes (other than an exception at > the end of a file whose size is not aligned to 512), but even so, a > request for just under 4G of block status could produce 8M extents, > resulting in a reply of 64M if it were not capped small...
2023 Mar 03
1
[PATCH v2 1/6] spec: Recommend cap on NBD_REPLY_TYPE_BLOCK_STATUS length
...en adding its > > qemu:dirty-bitmap:XYZ context extension (qemu commit 3d068aff16, Jun > > 2018), it added a cap to 128k extents (1M+4 bytes), and that cap was > > applied to base:allocation once qemu started sending multiple extents > > for that context as well (qemu commit fb7afc797e, Jul 2018). Qemu > > extents are never smaller than 512 bytes (other than an exception at > > the end of a file whose size is not aligned to 512), but even so, a > > request for just under 4G of block status could produce 8M extents, > > resulting in a reply of 64M if it w...
2023 Apr 13
6
[PATCH v3 0/6] NBD 64-bit extensions (spec only)
v2 was here: https://lists.debian.org/nbd/2022/11/msg00030.html The bulk of the changes since then are: - forbid NBD_OPT_EXPORT_NAME once extended headers are negotiated (Wouter) - consistently use 'maximum payload', rather than a haphazard mix of 'maximum block payload' (Vladimir) At this point, I want to make sure we are happy with the spec before re-posting patches for