On Thu, 27 Nov 2025, Clément Chigot wrote:
The main goal of this series is to introduce a new option "fat-size"
within the vvfat backend (patch 5).
This series also includes minor patches:
- patch 1 introduces another option to create unpartitionned disks.
- patch 2-4 are minor improvements easing the introducing of
"fat-size" option
This was tested on with a aarch64-linux kernel taken from
functional/aarch64/test-virt and on aarch64-qnx over raspi4b with a
workaround, not included here (the SD bus must be associated to the EMMC2
port instead of through GPIOs).
Changes since v2:
- patch 1:
- change default: true for hard disk, false for false.
Typo: false for floppy
- remove "unpartitioned" keyword within filename
- patch 5
- rename option "fs-size"
I'm still not sure if it could be done simpler without adding a separate
fs-size option and fix size to apply to vvfat instead of raw so it works
as expected not how it works now. The idea I proposed was to try to set
format to vvfat if file or protocol contains fat: which was discussed
here:
https://lists.nongnu.org/archive/html/qemu-devel/2025-11/msg01487.html
but I did not understand Kevin's reply if it's possible or why not.
Regards,
BALATON Zoltan
Clément Chigot (5):
vvfat: introduce partitioned option
vvfat: move fat_type check prior to size setup
vvfat: add a define for VVFAT_SECTOR_BITS and VVFAT_SECTOR_SIZE
vvfat: move size parameters within driver structure
vvfat: add support for "fs-size" option
block/vvfat.c | 350 +++++++++++++++++++++++++++++++------------
qapi/block-core.json | 16 +-
2 files changed, 270 insertions(+), 96 deletions(-)
