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| author | John Snow | 2017-03-16 22:23:50 +0100 |
|---|---|---|
| committer | Jeff Cody | 2017-03-22 18:26:27 +0100 |
| commit | f4d9cc88ee69a5b04a843424e50f466e36fcad4e (patch) | |
| tree | a2d8777a5e230efd54adfadd6020f8a1ab77e5b8 /include/sysemu | |
| parent | blockjob: add block_job_start_shim (diff) | |
| download | qemu-f4d9cc88ee69a5b04a843424e50f466e36fcad4e.tar.gz qemu-f4d9cc88ee69a5b04a843424e50f466e36fcad4e.tar.xz qemu-f4d9cc88ee69a5b04a843424e50f466e36fcad4e.zip | |
block-backend: add drained_begin / drained_end ops
Allow block backends to forward drain requests to their devices/users.
The initial intended purpose for this patch is to allow BBs to forward
requests along to BlockJobs, which will want to pause if their associated
BB has entered a drained region.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Message-id: 20170316212351.13797-3-jsnow@redhat.com
Signed-off-by: Jeff Cody <jcody@redhat.com>
Diffstat (limited to 'include/sysemu')
| -rw-r--r-- | include/sysemu/block-backend.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h index 096c17fce0..7462228ac1 100644 --- a/include/sysemu/block-backend.h +++ b/include/sysemu/block-backend.h @@ -58,6 +58,14 @@ typedef struct BlockDevOps { * Runs when the size changed (e.g. monitor command block_resize) */ void (*resize_cb)(void *opaque); + /* + * Runs when the backend receives a drain request. + */ + void (*drained_begin)(void *opaque); + /* + * Runs when the backend's last drain request ends. + */ + void (*drained_end)(void *opaque); } BlockDevOps; /* This struct is embedded in (the private) BlockBackend struct and contains |