[v3,0/3] zonefs: introduce -o explicit-open mount option

Message

Johannes Thumshirn Sept. 10, 2020, 7:59 a.m. UTC

Introduce a mount option for explicitly opening a device's zones when opening
the seq zone file for writing. This way we prevent resource exhaustion on
devices that export a maximum open zones limit. 

Changes to v2:
- Clear ZONEFS_ZONE_OPEN flag on error
- Fix missing newline

Johannes Thumshirn (3):
  zonefs: introduce helper for zone management
  zonefs: open/close zone on file open/close
  zonefs: document the explicit-open mount option

 Documentation/filesystems/zonefs.rst |  15 ++
 fs/zonefs/super.c                    | 198 +++++++++++++++++++++++++--
 fs/zonefs/zonefs.h                   |  10 ++
 3 files changed, 213 insertions(+), 10 deletions(-)