[Qemu-devel] [PATCH v2 0/7] introduce BSD-licensed block driver for "raw"

[Laszlo Ersek <lersek@redhat.com>]

v1->v2:
- added comment to raw_probe() [Kevin]
- fixed raw_reopen_prepare() [Paolo & Kevin]
- keeping BSDL: according to the v1 discussion, LGPLv2+ could work too,
  but "but most of the block layer is BSD" [Paolo] and I haven't been
  clearly instructed to switch to LGPLv2+.

  diff --git a/block/raw_bsd.c b/block/raw_bsd.c
  index 07e6f06..ab2b0fd 100644
  --- a/block/raw_bsd.c
  +++ b/block/raw_bsd.c
  @@ -41,10 +41,7 @@ static QEMUOptionParameter raw_create_options[] = {
   static int raw_reopen_prepare(BDRVReopenState *reopen_state,
                                 BlockReopenQueue *queue, Error **errp)
   {
  -    BDRVReopenState tmp = *reopen_state;
  -
  -    tmp.bs = tmp.bs->file;
  -    return bdrv_reopen_prepare(&tmp, queue, errp);
  +    return 0;
   }

   static int coroutine_fn raw_co_readv(BlockDriverState *bs, int64_t sector_num,
  @@ -150,6 +147,9 @@ static void raw_close(BlockDriverState *bs)

   static int raw_probe(const uint8_t *buf, int buf_size, const char *filename)
   {
  +    /* smallest possible positive score so that raw is used if and only if no
  +     * other block driver works
  +     */
       return 1;
   }

v1 blurb:

Paolo asked me to write such a driver based on his textual specification
alone. The first patch captures his email in full, the rest re-quotes
parts that are being implemented.

The tree compiles at each patch. The series passes "make check-block".

"block/raw.c" is not removed because I wanted to keep it out of my
series and out of my brain.

Laszlo Ersek (7):
  add skeleton for BSD licensed "raw" BlockDriver
  raw_bsd: emit debug events in bdrv_co_readv() and bdrv_co_writev()
  raw_bsd: add raw_create()
  raw_bsd: introduce "special members"
  raw_bsd: add raw_create_options
  raw_bsd: register bdrv_raw
  switch raw block driver from "raw.o" to "raw_bsd.o"

 block/Makefile.objs |    2 +-
 block/raw_bsd.c     |  186 +++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 187 insertions(+), 1 deletions(-)
 create mode 100644 block/raw_bsd.c