[bootlin/training-materials updates] master: NFS: switch to TCP as distributions are removing UDP support (be0a0b35)

[Alexandre Belloni]

Repository : https://github.com/bootlin/training-materials
On branch  : master
Link       : https://github.com/bootlin/training-materials/commit/be0a0b35452395499412c3dc6193680d85708226

>---------------------------------------------------------------

commit be0a0b35452395499412c3dc6193680d85708226
Author: Alexandre Belloni <alexandre.belloni at bootlin.com>
Date:   Fri Jun 26 21:40:42 2020 +0200

    NFS: switch to TCP as distributions are removing UDP support
    
    Signed-off-by: Alexandre Belloni <alexandre.belloni at bootlin.com>


>---------------------------------------------------------------

be0a0b35452395499412c3dc6193680d85708226
 .../kernel-compiling-and-nfs-booting.tex                            | 2 +-
 labs/sysdev-tinysystem/sysdev-tinysystem.tex                        | 2 +-
 labs/yocto-advanced-configuration/yocto-advanced-configuration.tex  | 2 +-
 .../sysdev-root-filesystem-principles.tex                           | 6 +++---
 4 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/labs/kernel-compiling-and-nfs-booting/kernel-compiling-and-nfs-booting.tex b/labs/kernel-compiling-and-nfs-booting/kernel-compiling-and-nfs-booting.tex
index 3a3e7981..5269bf88 100644
--- a/labs/kernel-compiling-and-nfs-booting/kernel-compiling-and-nfs-booting.tex
+++ b/labs/kernel-compiling-and-nfs-booting/kernel-compiling-and-nfs-booting.tex
@@ -142,7 +142,7 @@ just one line):
 \begin{verbatim}
 setenv bootargs root=/dev/nfs rw ip=192.168.0.100:::::usb0 console=ttyS0,115200n8
   g_ether.dev_addr=f8:dc:7a:00:00:02 g_ether.host_addr=f8:dc:7a:00:00:01
-  nfsroot=192.168.0.1:/home/<user>/linux-kernel-labs/modules/nfsroot,nfsvers=3
+  nfsroot=192.168.0.1:/home/<user>/linux-kernel-labs/modules/nfsroot,nfsvers=3,tcp
 \end{verbatim}
 
 Once again, replace \code{<user>} by your actual user name.
diff --git a/labs/sysdev-tinysystem/sysdev-tinysystem.tex b/labs/sysdev-tinysystem/sysdev-tinysystem.tex
index f8477818..2e1367ed 100644
--- a/labs/sysdev-tinysystem/sysdev-tinysystem.tex
+++ b/labs/sysdev-tinysystem/sysdev-tinysystem.tex
@@ -86,7 +86,7 @@ Use the following U-Boot command to do so, {\bf in just 1 line}
 
 \begin{verbatim}
 setenv bootargs root=/dev/nfs ip=192.168.0.100:::::eth0
-   nfsroot=192.168.0.1:/home/<user>/__SESSION_NAME__-labs/tinysystem/nfsroot,nfsvers=3 rw
+   nfsroot=192.168.0.1:/home/<user>/__SESSION_NAME__-labs/tinysystem/nfsroot,nfsvers=3,tcp rw
 \end{verbatim}
 
 Once again, replace \code{<user>} by your actual user name.
diff --git a/labs/yocto-advanced-configuration/yocto-advanced-configuration.tex b/labs/yocto-advanced-configuration/yocto-advanced-configuration.tex
index 7ce62375..8af76fc3 100644
--- a/labs/yocto-advanced-configuration/yocto-advanced-configuration.tex
+++ b/labs/yocto-advanced-configuration/yocto-advanced-configuration.tex
@@ -18,7 +18,7 @@ First we need to set the kernel boot arguments U-Boot will pass to the
 Linux kernel at boot time:
 \begin{verbatim}
 setenv bootargs 'console=ttyS0,115200 root=/dev/nfs rw
-  nfsroot=192.168.0.1:/nfs,nfsvers=3
+  nfsroot=192.168.0.1:/nfs,nfsvers=3,tcp
   ip=192.168.0.100:::::usb0 g_ether.dev_addr=11:22:33:44:55:02
   g_ether.host_addr=11:22:33:44:55:01'
 saveenv
diff --git a/slides/sysdev-root-filesystem-principles/sysdev-root-filesystem-principles.tex b/slides/sysdev-root-filesystem-principles/sysdev-root-filesystem-principles.tex
index 1d682b5f..06dab423 100644
--- a/slides/sysdev-root-filesystem-principles/sysdev-root-filesystem-principles.tex
+++ b/slides/sysdev-root-filesystem-principles/sysdev-root-filesystem-principles.tex
@@ -197,9 +197,9 @@ Kernel panic - not syncing: VFS: Unable to mount root fs on unknown block(0,0)
     \item \code{root=/dev/nfs} (we want rootfs over NFS)
     \item \code{ip=192.168.1.111} (target IP address)
     \item \code{nfsroot=192.168.1.110:/home/tux/rootfs/} (NFS server details)
-    \item You may need to add "\code{,nfsvers=3}" to the \code{nfsroot} setting,
-          as an NFS version 2 client may be rejected by the NFS server
-	  in recent GNU/Linux distributions.
+    \item You may need to add "\code{,nfsvers=3,tcp}" to the
+      \code{nfsroot} setting, as an NFS version 2 client and UDP may
+      be rejected by the NFS server in recent GNU/Linux distributions.
     \end{itemize}
   \end{itemize}
 \end{frame}