On Mon, Oct 09, 2023 at 04:21:46PM -0400, Vivek Goyal wrote: > On Mon, Oct 09, 2023 at 11:53:42AM +0200, Miklos Szeredi wrote: > > On Thu, 5 Oct 2023 at 22:30, Vivek Goyal <vgoyal@xxxxxxxxxx> wrote: > > > > > > virtiofs filesystem is mounted using a "tag" which is exported by the > > > virtiofs device. virtiofs driver knows about all the available tags but > > > these are not exported to user space. > > > > > > People have asked these tags to be exported to user space. Most recently > > > Lennart Poettering has asked for it as he wants to scan the tags and mount > > > virtiofs automatically in certain cases. > > > > > > https://gitlab.com/virtio-fs/virtiofsd/-/issues/128 > > > > > > This patch exports tags through sysfs. One tag is associated with each > > > virtiofs device. A new "tag" file appears under virtiofs device dir. > > > Actual filesystem tag can be obtained by reading this "tag" file. > > > > > > For example, if a virtiofs device exports tag "myfs", a new file "tag" > > > will show up here. > > > > > > /sys/bus/virtio/devices/virtio<N>/tag > > > > > > # cat /sys/bus/virtio/devices/virtio<N>/tag > > > myfs > > > > > > Signed-off-by: Vivek Goyal <vgoyal@xxxxxxxxxx> > > > > Hi Vivek, > > > > This needs something under Documentation/. > > Hi Miklos, > > Hmm.., I can easily update the virtiofs documentation. > > Initially I was thinking to put something in Documentation/ABI/testing/ > as well. But I don't see any virtio related. In fact can't find any > files related to "virtio" at all. > > So I will just update the Documentation/filesystems/virtiofs.rst for now. No, please put it in Documentation/ABI/ that is where sysfs file information goes, and where our tools actually look for it (and test for it!) thanks, greg k-h
