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| author | Bryn M. Reeves <bmr@redhat.com> | 2016-12-11 12:53:04 +0000 |
|---|---|---|
| committer | Bryn M. Reeves <bmr@redhat.com> | 2017-01-25 16:15:21 +0000 |
| commit | e0d19feb85ce8e143c7f107d7bf1c668d667a57c (patch) | |
| tree | c1bdf92e49755754abeea139afd0fcaa553fbe6e /libdm/.exported_symbols.DM_1_02_138 | |
| parent | 1c00bb5da3a53152c5f9e0c9d3382afdec1b2455 (diff) | |
| download | lvm2-e0d19feb85ce8e143c7f107d7bf1c668d667a57c.tar.gz | |
libdm: add dm_stats_update_regions_from_fd()
Add a call to update the regions corresponding to a file mapped
group of regions. The regions to be updated must be grouped, to
allow us to correctly identify extents that have been deallocated
since the map was created.
Tables are built of the file extents, and the extents currently
mapped to dmstats regions: if a region no longer has a matching
file extent, it is deleted, and new regions are created for any
file extents without a matching region.
The FIEMAP call returns extents that are currently in-memory (or
journaled) and awaiting allocation in the file system. These have
the FIEMAP_EXTENT_UNKNOWN | FIEMAP_EXTENT_DELALLOC flag bits set
in the fe_flags field - these extents are skipped until they
have a known disk location.
Since it is possile for the 0th extent of the file to have been
deallocated this must also handle the possible deletion and
re-creation of the group leader: if no other region allocation
is taking place the group identifier will not change.
Diffstat (limited to 'libdm/.exported_symbols.DM_1_02_138')
| -rw-r--r-- | libdm/.exported_symbols.DM_1_02_138 | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/libdm/.exported_symbols.DM_1_02_138 b/libdm/.exported_symbols.DM_1_02_138 index 08f936fe3..3ebc59dca 100644 --- a/libdm/.exported_symbols.DM_1_02_138 +++ b/libdm/.exported_symbols.DM_1_02_138 @@ -1,4 +1,5 @@ dm_bit_get_last dm_bit_get_prev +dm_stats_update_regions_from_fd dm_bitset_parse_list dm_stats_bind_from_fd |