selftest/s3: expose share with FS applicable config

Attempt to determine the underlying test share filesystem using statfs.
If the filesystem is detected and an applicable configuration is
available, then apply it to a new filesystem specific share.
Btrfs is currently the only VFS module to utilize this logic.

Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

diff --git a/selftest/target/Samba3.pm b/selftest/target/Samba3.pm
index c3a434558f7c65d9d4861874a85f39e3191aa0a2..ebfabf6f113aa2233a15765f795eacbd975cb817 100755 (executable)
--- a/selftest/target/Samba3.pm
+++ b/selftest/target/Samba3.pm
@@ -29,6 +29,25 @@ sub have_ads($) {
        return $found_ads;
 }
 
+# return smb.conf parameters applicable to @path, based on the underlying
+# filesystem type
+sub get_fs_specific_conf($$)
+{
+       my ($self, $path) = @_;
+       my $mods = "";
+       my $stat_out = `stat --file-system $path` or return "";
+
+       if ($stat_out =~ m/Type:\s+btrfs/) {
+               $mods .= "btrfs ";
+       }
+
+       if ($mods) {
+               return "vfs objects = $mods";
+       }
+
+       return undef;
+}
+
 sub new($$) {
        my ($classname, $bindir, $binary_mapping, $srcdir, $server_maxtime) = @_;
        my $self = { vars => {},
@@ -45,7 +64,7 @@ sub teardown_env($$)
 {
        my ($self, $envvars) = @_;
        my $count = 0;
-       
+
        # This should cause smbd to terminate gracefully
        close($envvars->{STDIN_PIPE});
 
@@ -832,6 +851,8 @@ sub provision($$$$$$)
        my $nmbdsockdir="$prefix_abs/nmbd";
        unlink($nmbdsockdir);
 
+       my $fs_specific_conf = $self->get_fs_specific_conf($shrdir);
+
        ## 
        ## create the test directory layout
        ##
@@ -1070,6 +1091,9 @@ sub provision($$$$$$)
        kernel share modes = no
        kernel oplocks = no
        posix locking = no
+[fs_specific]
+       copy = tmp
+       $fs_specific_conf
 [print1]
        copy = tmp
        printable = yes