* Wed Apr 22 2026 Miroslav Rezanina <mrezanin@redhat.com> - 1.13.3-2

- Fixing README file [RHEL-169757]
- Resolves: RHEL-169757
  (Fix the README file: --announce-submounts is enabled by default)

0001-README-announce-submounts-is-enabled-by-default.patch

@@ -0,0 +1,97 @@
+From 80783db4428a758e6b5fac1eef21a2a0655d8282 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?J=C3=B6rg=20Thalheim?= <joerg@thalheim.io>
+Date: Wed, 11 Jun 2025 21:13:16 +0200
+Subject: [PATCH] README: --announce-submounts is enabled by default
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Signed-off-by: German Maglione <gmaglione@redhat.com>
+---
+ README.md | 22 ++++++++++++++--------
+ 1 file changed, 14 insertions(+), 8 deletions(-)
+
+diff --git a/README.md b/README.md
+index 2a4c843..3200259 100644
+--- a/README.md
++++ b/README.md
+@@ -94,7 +94,7 @@ Honor the `O_DIRECT` flag passed down by guest applications.
+ ```shell
+ --announce-submounts
+ ```
+-Tell the guest which directories are mount points.
++Tell the guest which directories are mount points [enabled by default].
+ If multiple filesystems are mounted in the shared directory,
+ virtiofsd passes inode IDs directly to the guest, and because such IDs
+ are unique only on a single filesystem, it is possible that the guest
+@@ -110,6 +110,12 @@ On the other hand, when running without `--announce-submounts`,
+ the client only sends a `SYNCFS` request for the root mount,
+ this may lead to data loss/corruption.
+ 
++```shell
++--no-announce-submounts
++```
++Disable announce-submounts mode. This flag overrides the default behavior
++of announcing submounts to the guest.
++
+ ```shell
+ --no-killpriv-v2
+ ```
+@@ -495,7 +501,7 @@ Export `/mnt` on vhost-user UNIX domain socket `/tmp/vfsd.sock`:
+ 
+ ```shell
+ host# virtiofsd --socket-path=/tmp/vfsd.sock --shared-dir /mnt \
+-        --announce-submounts --inode-file-handles=mandatory &
++        --inode-file-handles=mandatory &
+ 
+ host# qemu-system \
+         -blockdev file,node-name=hdd,filename=<your image> \
+@@ -547,14 +553,14 @@ mapped in as themselves with the help of the `newuidmap(1)` and `newgidmap(1)` h
+ 
+ ```shell
+ host$ podman unshare -- virtiofsd --socket-path=/tmp/vfsd.sock --shared-dir /mnt \
+-        --announce-submounts --sandbox chroot &
++        --sandbox chroot &
+ ```
+ Alternatively we can also achieve the same effect without Podman by relying on `unshare(1)` included in
+ `util-linux` which has the benefit that it should already be installed for most users. Use it like so:
+ 
+ ```shell
+ host$ unshare -r --map-auto -- virtiofsd --socket-path=/tmp/vfsd.sock --shared-dir /mnt \
+-        --announce-submounts --sandbox chroot &
++        --sandbox chroot &
+ ```
+ 
+ Using `lxc-usernsexec(1)`, we could leave the invoking user outside the mapping, having
+@@ -562,14 +568,14 @@ the root user inside the user namespace mapped to the user and group 100000:
+ 
+ ```shell
+ host$ lxc-usernsexec -m b:0:100000:65536 -- virtiofsd --socket-path=/tmp/vfsd.sock \
+-        --shared-dir /mnt --announce-submounts --sandbox chroot &
++        --shared-dir /mnt --sandbox chroot &
+ ```
+ 
+ In order to have the same behavior as `podman-unshare(1)`, we need to run
+ 
+ ```shell
+ host$ lxc-usernsexec -m b:0:1000:1 -m b:1:100000:65536 -- virtiofsd --socket-path=/tmp/vfsd.sock \
+-        --shared-dir /mnt --announce-submounts --sandbox chroot &
++        --shared-dir /mnt --sandbox chroot &
+ ```
+ 
+ We could also select `--sandbox none` instead of `--sandbox chroot`.
+@@ -610,9 +616,9 @@ exporting `share0`, `share1`:
+ mkdir -p share/{sh0,sh1}
+ mount -o bind share0 share/sh0
+ mount -o bind share1 share/sh1
+-virtiofsd --announce-submounts --shared-dir share ...
++virtiofsd --shared-dir share ...
+ ```
+-Note the use of `--announce-submounts` to prevent data loss/corruption.
++Note: announce-submounts is enabled by default to prevent data loss/corruption.
+ 
+ - How to add virtiofs devices to an existing qemu command-line:
+ 
+-- 
+2.49.0
+

virtiofsd.spec

@@ -1,6 +1,6 @@
 Name:           virtiofsd
 Version:        1.13.3
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        Virtio-fs vhost-user device daemon (Rust version)
 
 License:        Apache-2.0 AND BSD-3-Clause
@@ -11,6 +11,8 @@ Source:         %{crates_source}
 #   cargo vendor && tar Jcvf ../%%{name}-%%{version}-vendor.tar.xz vendor/ ; popd
 Source1:        %{name}-%{version}-vendor.tar.gz
 
+Patch1:		0001-README-announce-submounts-is-enabled-by-default.patch
+
 ExclusiveArch:  %{rust_arches}
 # Some of our deps (i.e. vm-memory) are not available on 32 bits targets.
 # In addition, there's no ppc64 qemu-kvm available for RHEL.
@@ -76,6 +78,11 @@ install -D -p -m 0644 50-virtiofsd.json %{buildroot}%{_datadir}/qemu/vhost-user/
 %{_datadir}/qemu/vhost-user/50-qemu-virtiofsd.json
 
 %changelog
+* Wed Apr 22 2026  Miroslav Rezanina <mrezanin@redhat.com> - 1.13.3-2
+- Fixing README file [RHEL-169757]
+- Resolves: RHEL-169757
+  (Fix the README file: --announce-submounts is enabled by default)
+
 * Thu Dec 04 2025 Miroslav Rezanina <mrezanin@redhat.com> - 1.13.3-1
 - Rebase to 1.13.3 [RHEL-133034]
 - Resolves: RHEL-133034