block/file-posix: update .help of BLOCK_OPT_PREALLOC option

Show 'falloc' among the allowed values of 'preallocation'
option, only when it is supported (if defined CONFIG_POSIX_FALLOCATE)

Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20190524075848.23781-3-sgarzare@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
This commit is contained in:
Stefano Garzarella 2019-05-24 09:58:47 +02:00 committed by Markus Armbruster
parent 64c7580c2e
commit abea00533f
1 changed files with 5 additions and 1 deletions

View File

@ -2752,7 +2752,11 @@ static QemuOptsList raw_create_opts = {
{
.name = BLOCK_OPT_PREALLOC,
.type = QEMU_OPT_STRING,
.help = "Preallocation mode (allowed values: off, falloc, full)"
.help = "Preallocation mode (allowed values: off"
#ifdef CONFIG_POSIX_FALLOCATE
", falloc"
#endif
", full)"
},
{ /* end of list */ }
}