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6b1ac78dd0
The shutdown ioctl should follow the XFS one, which use magic number 'X', and ioctl number 125, with a uint32 as flags. For now btrfs don't distinguish DEFAULT and LOGFLUSH flags (just like f2fs), both will freeze the fs first (implies committing the current transaction), setting the SHUTDOWN flag and finally thaw the fs. For NOLOGFLUSH flag, the freeze/thaw part is skipped thus the current transaction is aborted. The new shutdown ioctl is hidden behind experimental features for more testing. Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Reviewed-by: Anand Jain <asj@kernel.org> Tested-by: Anand Jain <asj@kernel.org> Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com> |
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