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Retire .write/.read file operations

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The .write/.read file operations callbacks can be retired since
support for .read_iter/.write_iter and .aio_read/.aio_write has
been added.  The vfs_write()/vfs_read() entry functions will
select the correct interface for the kernel.  This is desirable
because all VFS write/read operations now rely on common code.

This change also add the generic write checks to make sure that
ulimits are enforced correctly on write.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Closes #5587 
Closes #5673
This commit is contained in:
Chunwei Chen
2017-01-27 10:43:39 -08:00
committed by Brian Behlendorf
parent 986dd8aacc
commit 933ec99951
6 changed files with 132 additions and 37 deletions
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tests/zfs-tests/tests/functional/large_files/Makefile.am
+2 -1
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@@ -2,4 +2,5 @@ pkgdatadir = $(datadir)/@PACKAGE@/zfs-tests/tests/functional/large_files
dist_pkgdata_SCRIPTS = \
setup.ksh \
cleanup.ksh \
large_files_001_pos.ksh
large_files_001_pos.ksh \
large_files_002_pos.ksh
tests/zfs-tests/tests/functional/large_files/large_files_002_pos.ksh
Executable
+55
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@@ -0,0 +1,55 @@
#!/bin/ksh -p
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (the "License").
# You may not use this file except in compliance with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#
#
# Copyright (c) 2015 by Lawrence Livermore National Security, LLC.
# All rights reserved.
#
. $STF_SUITE/include/libtest.shlib
#
# DESCRIPTION:
# Verify 'ulimit -f' file size restrictions are enforced.
#
# STRATEGY:
# 1. Set ulimit file size to unlimited, verify files can be created.
# 2. Reduce ulimit file size, verify the expected error is returned.
#
verify_runnable "both"
log_assert "Verify 'ulimit -f' maximum file size is enforced"
# Verify 'ulimit -f unlimited' works
log_must ulimit -f unlimited
log_must sh -c 'dd if=/dev/zero of=$TESTDIR/ulimit_write_file bs=1M count=2'
log_must sh -c '$TRUNCATE -s2M $TESTDIR/ulimit_trunc_file'
log_must $RM $TESTDIR/ulimit_write_file $TESTDIR/ulimit_trunc_file
# Verify 'ulimit -f <size>' works
log_must ulimit -f 1024
log_mustnot sh -c 'dd if=/dev/zero of=$TESTDIR/ulimit_write_file bs=1M count=2'
log_mustnot sh -c '$TRUNCATE -s2M $TESTDIR/ulimit_trunc_file'
log_must $RM $TESTDIR/ulimit_write_file $TESTDIR/ulimit_trunc_file
log_pass "Successfully enforced 'ulimit -f' maximum file size"