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block: Set request_alignment during .bdrv_refresh_limits()

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We want to eventually stick request_alignment alongside other
BlockLimits, but first, we must ensure it is populated at the
same time as all other limits, rather than being a special case
that is set only when a block is first opened.

Add a .bdrv_refresh_limits() to all four of our legacy devices
that will always be sector-only (bochs, cloop, dmg, vvfat), in
spite of their recent conversion to expose a byte interface.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Eric Blake 2016-06-23 16:37:17 -06:00 • committed by Kevin Wolf
parent 2914a1de99
commit a65064816d
4 changed files with 24 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

7
block/vvfat.c
View file

@ -1177,7 +1177,6 @@ static int vvfat_open(BlockDriverState *bs, QDict *options, int flags,
bs->read_only = 0;
}
bs->request_alignment = BDRV_SECTOR_SIZE; /* No sub-sector I/O supported */
bs->total_sectors = cyls * heads * secs;
if (init_directories(s, dirname, heads, secs, errp)) {
@ -1209,6 +1208,11 @@ fail:
return ret;
}
static void vvfat_refresh_limits(BlockDriverState *bs, Error **errp)
{
bs->request_alignment = BDRV_SECTOR_SIZE; /* No sub-sector I/O supported */
}
static inline void vvfat_close_current_file(BDRVVVFATState *s)
{
if(s->current_mapping) {
@ -3046,6 +3050,7 @@ static BlockDriver bdrv_vvfat = {
.bdrv_parse_filename = vvfat_parse_filename,
.bdrv_file_open = vvfat_open,
.bdrv_refresh_limits = vvfat_refresh_limits,
.bdrv_close = vvfat_close,
.bdrv_co_preadv = vvfat_co_preadv,