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authorJeff Cody <jcody@redhat.com>2013-10-30 10:44:47 -0400
committerStefan Hajnoczi <stefanha@redhat.com>2013-11-07 13:58:59 +0100
commit8adc52336d9c44ab4c7b9358a7be22ac0ef962bf (patch)
tree65cfb1879270b64b35e88d8e5ba155646b5feb26 /target-microblaze
parent1a848fd4517820981b542e0d10e64c0426414229 (diff)
block: vhdx - add log write support
This adds support for writing to the VHDX log. For spec details, see VHDX Specification Format v1.00: https://www.microsoft.com/en-us/download/details.aspx?id=34750 There are a few limitations to this log support: 1.) There is no caching yet 2.) The log is flushed after each entry The primary write interface, vhdx_log_write_and_flush(), performs a log write followed by an immediate flush of the log. As each log entry sector is a minimum of 4KB, partial sector writes are filled in with data from the disk write destination. If the current file log GUID is 0, a new GUID is generated and updated in the header. Signed-off-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'target-microblaze')
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