[Qemu-devel] [PATCH v7 0/3] 9p: Fix file ID collisions

[Christian Schoenebeck via Qemu-devel <qemu-devel@nongnu.org>]

This is v7 of a proposed patch set for fixing file ID collisions with 9pfs.

v6->v7:

  * Rebased to https://github.com/gkurz/qemu/commits/9p-next
    (SHA1 7fc4c49e91).

  * Be pedantic and abort with error on wrong value for new command line
    argument 'multidevs'.

  * Adjusted patches to qemu code style guidelines.

  * Fixed potential crash in qp_table_destroy() on error path.

  * Use dedicated hash table init functions (qpd_table_init(),
    qpf_table_init(), qpp_table_init()):
    https://lists.gnu.org/archive/html/qemu-devel/2019-09/msg00144.html

  * Use warn_report_once() instead of error_report_once() for issues
    interpreted merely as being warnings, not errors.

  * Simplified hash table destruction (due to simplified error path
    introduced by SHA1 7fc4c49e91).

  * Dropped capturing root_ino for now:
    https://lists.gnu.org/archive/html/qemu-devel/2019-09/msg00146.html

  * Don't update proxy docs, since new command line argument 'multidevs' is
    limited to the local backend for now.

  * Mention in docs that readdir() is currently not blocked by
    'multidevs=forbid'.

  * Rename qid_path_prefixmap() -> qid_path_suffixmap() in patch 3
    (due to the semantic change of that function by that patch).

Christian Schoenebeck (3):
  9p: Added virtfs option 'multidevs=remap|forbid|warn'
  9p: stat_to_qid: implement slow path
  9p: Use variable length suffixes for inode remapping

 fsdev/file-op-9p.h      |   5 +
 fsdev/qemu-fsdev-opts.c |   7 +-
 fsdev/qemu-fsdev.c      |  17 ++
 hw/9pfs/9p.c            | 456 ++++++++++++++++++++++++++++++++++++++--
 hw/9pfs/9p.h            |  59 ++++++
 qemu-options.hx         |  26 ++-
 vl.c                    |   7 +-
 7 files changed, 552 insertions(+), 25 deletions(-)

-- 
2.20.1