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nfsroot: Default mount option should ask for built-in NFS version 

Change the nfsroot default mount option to ask for NFSv2 only *if* the
kernel was built with NFSv2 support.
If not, default to NFSv3 or as last choice to NFSv4, depending on actual
kernel config.

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Helge Deller 2020-10-16 12:13:00 +02:00 committed by Anna Schumaker
parent 3cea11cd5e
commit 3fc2bfa365
1 changed files with 6 additions and 0 deletions
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6
fs/nfs/nfsroot.c
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@ -88,7 +88,13 @@
#define NFS_ROOT "/tftpboot/%s"
/* Default NFSROOT mount options. */
#if defined(CONFIG_NFS_V2)
#define NFS_DEF_OPTIONS "vers=2,tcp,rsize=4096,wsize=4096"
#elif defined(CONFIG_NFS_V3)
#define NFS_DEF_OPTIONS "vers=3,tcp,rsize=4096,wsize=4096"
#else
#define NFS_DEF_OPTIONS "vers=4,tcp,rsize=4096,wsize=4096"
#endif
/* Parameters passed from the kernel command line */
static char nfs_root_parms[NFS_MAXPATHLEN + 1] __initdata = "";