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| author | Alasdair G Kergon <agk@redhat.com> | 2012-07-27 15:08:16 +0100 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2012-07-27 15:08:16 +0100 |
| commit | 1f4e0ff07980820977f45d6a5dbc81d3bb9ce4d3 (patch) | |
| tree | 5b5a159add010d09ea58ca12fd079b16f05333b8 /drivers/md/dm.h | |
| parent | e49e582965b3694f07a106adc83ddb44aa4f0890 (diff) | |
| download | linux-1f4e0ff07980820977f45d6a5dbc81d3bb9ce4d3.tar.gz | |
dm thin: commit before gathering status
Commit outstanding metadata before returning the status for a dm thin pool so that the numbers reported are as up-to-date as possible. The commit is not performed if the device is suspended or if the DM_NOFLUSH_FLAG is supplied by userspace and passed to the target through a new 'status_flags' parameter in the target's dm_status_fn. The userspace dmsetup tool will support the --noflush flag with the 'dmsetup status' and 'dmsetup wait' commands from version 1.02.76 onwards. Tested-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm.h')
| -rw-r--r-- | drivers/md/dm.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/md/dm.h b/drivers/md/dm.h index b7dacd59d8d7..52eef493d266 100644 --- a/drivers/md/dm.h +++ b/drivers/md/dm.h @@ -23,6 +23,11 @@ #define DM_SUSPEND_NOFLUSH_FLAG (1 << 1) /* + * Status feature flags + */ +#define DM_STATUS_NOFLUSH_FLAG (1 << 0) + +/* * Type of table and mapped_device's mempool */ #define DM_TYPE_NONE 0 |