diff options
| author | Brian Behlendorf <[email protected]> | 2021-11-07 13:27:44 -0800 |
|---|---|---|
| committer | GitHub <[email protected]> | 2021-11-07 14:27:44 -0700 |
| commit | de198f2d9507b6dcf3d0d8f037ba33940208733e (patch) | |
| tree | 79cc6e16cae7527aa51672da56f4cb026053f3bf /tests/zfs-tests/cmd/Makefile.am | |
| parent | 4b87c1981d47655fd2eec2fb95179818240c4945 (diff) | |
Fix lseek(SEEK_DATA/SEEK_HOLE) mmap consistency
When using lseek(2) to report data/holes memory mapped regions of
the file were ignored. This could result in incorrect results.
To handle this zfs_holey_common() was updated to asynchronously
writeback any dirty mmap(2) regions prior to reporting holes.
Additionally, while not strictly required, the dn_struct_rwlock is
now held over the dirty check to prevent the dnode structure from
changing. This ensures that a clean dnode can't be dirtied before
the data/hole is located. The range lock is now also taken to
ensure the call cannot race with zfs_write().
Furthermore, the code was refactored to provide a dnode_is_dirty()
helper function which checks the dnode for any dirty records to
determine its dirtiness.
Reviewed-by: Matthew Ahrens <[email protected]>
Reviewed-by: Tony Hutter <[email protected]>
Reviewed-by: Rich Ercolani <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Issue #11900
Closes #12724
Diffstat (limited to 'tests/zfs-tests/cmd/Makefile.am')
| -rw-r--r-- | tests/zfs-tests/cmd/Makefile.am | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tests/zfs-tests/cmd/Makefile.am b/tests/zfs-tests/cmd/Makefile.am index 2b965ca70..d1c29fcd1 100644 --- a/tests/zfs-tests/cmd/Makefile.am +++ b/tests/zfs-tests/cmd/Makefile.am @@ -19,6 +19,7 @@ SUBDIRS = \ mktree \ mmap_exec \ mmap_libaio \ + mmap_seek \ mmapwrite \ nvlist_to_lua \ randwritecomp \ |