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Revision 4dca4b63

ID4dca4b639cb20fee38f6eec0a391aecc0ad8848d

Added by Naphtali Sprei over 12 years ago

block: more read-only changes, related to backing files

Open backing file read-only where possible
Upgrade backing file to read-write during commit, back to read-only after commit
If upgrade fail, back to read-only. If also fail, "disconnect" the drive.

Signed-off-by: Naphtali Sprei <>
Signed-off-by: Anthony Liguori <>

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