diff options
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/Makefile.am | 1 | ||||
| -rwxr-xr-x | tests/dd/nocache | 58 |
2 files changed, 59 insertions, 0 deletions
diff --git a/tests/Makefile.am b/tests/Makefile.am index 28eafe8ae..99b46e8e8 100644 --- a/tests/Makefile.am +++ b/tests/Makefile.am @@ -352,6 +352,7 @@ TESTS = \ df/unreadable \ dd/direct \ dd/misc \ + dd/nocache \ dd/not-rewound \ dd/reblock \ dd/skip-seek \ diff --git a/tests/dd/nocache b/tests/dd/nocache new file mode 100755 index 000000000..b0d4cc107 --- /dev/null +++ b/tests/dd/nocache @@ -0,0 +1,58 @@ +#!/bin/sh +# Ensure dd handles the 'nocache' flag + +# Copyright (C) 2011 Free Software Foundation, Inc. + +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. + +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. + +. "${srcdir=.}/init.sh"; path_prepend_ ../src +print_ver_ dd + +# This should not call posix_fadvise +dd iflag=nocache oflag=nocache if=/dev/null of=/dev/null || fail=1 + +# We should get an error for trying to process a pipe +dd iflag=nocache count=0 && fail=1 + +# O_DIRECT is orthogonal to drop cache so mutually exclusive +dd iflag=nocache,direct if=/dev/null && fail=1 + +# The rest ensure that the documented uses cases +# proceed without error +for f in ifile ofile; do + dd if=/dev/zero of=$f conv=fdatasync count=100 || framework_failure +done + +# Advise to drop cache for whole file +if ! dd if=ifile iflag=nocache count=0 2>err; then + if grep -F 'Operation not supported' err >/dev/null; then + warn_ 'skipping part; this file system lacks support for posix_fadvise()' + skip=1 + else + fail=1 + fi +fi + +if test "$skip" != 1; then + # Ensure drop cache for whole file + dd of=ofile oflag=nocache conv=notrunc,fdatasync count=0 || fail=1 + + # Drop cache for part of file + dd if=ifile iflag=nocache skip=10 count=10 of=/dev/null || fail=1 + + # Stream data just using readahead cache + dd if=ifile of=ofile iflag=nocache oflag=nocache || fail=1 +fi + +Exit $fail |