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| author | Paolo Bonzini | 2013-09-04 19:00:29 +0200 |
|---|---|---|
| committer | Stefan Hajnoczi | 2013-09-06 15:25:09 +0200 |
| commit | 4333bb71405f58a8dc8d3255feb3ca5960b0daf8 (patch) | |
| tree | 68229e0bed3ae42b5d0dd7eb36bb068480cd405a /include/exec/user | |
| parent | block: introduce bdrv_get_block_status API (diff) | |
| download | qemu-4333bb71405f58a8dc8d3255feb3ca5960b0daf8.tar.gz qemu-4333bb71405f58a8dc8d3255feb3ca5960b0daf8.tar.xz qemu-4333bb71405f58a8dc8d3255feb3ca5960b0daf8.zip | |
block: define get_block_status return value
Define the return value of get_block_status. Bits 0, 1, 2 and 9-62
are valid; bit 63 (the sign bit) is reserved for errors. Bits 3-8
are left for future extensions.
The return code is compatible with the old is_allocated API: if a driver
only returns 0 or 1 (aka BDRV_BLOCK_DATA) like is_allocated used to,
clients of is_allocated will not have any change in behavior. Still,
we will return more precise information in the next patches and the
new definition of bdrv_is_allocated is already prepared for this.
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'include/exec/user')
0 files changed, 0 insertions, 0 deletions