Re: [patch 1/3] [PATCH 1/3] xfstests: add test for global metadata reservation publishing

Jeff Mahoney
2013-10-28T19:55:34Z

[-- Attachment #1.1: Type: text/plain, Size: 6091 bytes --]

On 10/28/13, 11:59 AM, Josef Bacik wrote:
> On Fri, Oct 25, 2013 at 04:52:47PM -0400, Jeff Mahoney wrote:
>> My publishing patchset added the ability for the kernel to report
>> the size of the global metadata reservation via ioctl and sysfs.
>>
>> This test confirms that we get sane results on an empty file system.
>>
>> ENOTTY and missing /sys/fs/btrfs/<fsid>/allocation are not considered
>> failures.
>>
>> Signed-off-by: Jeff Mahoney <jeffm@suse.com>
>> ---
>> src/Makefile | 3 +-
>> src/btrfs_ioctl_helper.c | 90 ++++++++++++++++++++++++++++++++++++++++++++++
>> tests/btrfs/100 | 92 ++++++++++++++++++++++++++++++++++++++++++++++++
>> tests/btrfs/100.out | 2 ++
>> 4 files changed, 186 insertions(+), 1 deletion(-)
>> create mode 100644 src/btrfs_ioctl_helper.c
>> create mode 100755 tests/btrfs/100
>> create mode 100644 tests/btrfs/100.out
>>
>> diff --git a/src/Makefile b/src/Makefile
>> index 84c8297..299f675 100644
>> --- a/src/Makefile
>> +++ b/src/Makefile
>> @@ -18,7 +18,8 @@ LINUX_TARGETS = xfsctl bstat t_mtab getdevicesize preallo_rw_pattern_reader \
>> locktest unwritten_mmap bulkstat_unlink_test t_stripealign \
>> bulkstat_unlink_test_modified t_dir_offset t_futimens t_immutable \
>> stale_handle pwrite_mmap_blocked t_dir_offset2 seek_sanity_test \
>> - seek_copy_test t_readdir_1 t_readdir_2 fsync-tester nsexec
>> + seek_copy_test t_readdir_1 t_readdir_2 fsync-tester nsexec \
>> + btrfs_ioctl_helper
>>
>> SUBDIRS =
>>
>> diff --git a/src/btrfs_ioctl_helper.c b/src/btrfs_ioctl_helper.c
>> new file mode 100644
>> index 0000000..a88b7b5
>> --- /dev/null
>> +++ b/src/btrfs_ioctl_helper.c
>> @@ -0,0 +1,90 @@
>> +#include <sys/ioctl.h>
>> +#include <stdio.h>
>> +#include <sys/fcntl.h>
>> +#include <errno.h>
>> +#include <string.h>
>> +#include <stdint.h>
>> +#include <unistd.h>
>> +
>> +#ifndef BTRFS_IOCTL_MAGIC
>> +#define BTRFS_IOCTL_MAGIC 0x94
>> +#endif
>> +
>> +#ifndef BTRFS_IOC_GLOBAL_RSV
>> +#define BTRFS_IOC_GLOBAL_RSV _IOR(BTRFS_IOCTL_MAGIC, 20, uint64_t)
>> +#endif
>> +
>> +static int global_rsv_ioctl(int fd, int argc, char *argv[])
>> +{
>> + uint64_t reserved;
>> + int ret = ioctl(fd, BTRFS_IOC_GLOBAL_RSV, &reserved);
>> + if (ret)
>> + return -errno;
>> +
>> + printf("%llu\n", (unsigned long long)reserved);
>> + return 0;
>> +}
>> +
>> +#define IOCTL_TABLE_ENTRY(_ioctl_name, _handler) \
>> + { .name = #_ioctl_name, .ioctl_cmd = BTRFS_IOC_##_ioctl_name, \
>> + .handler = _handler, }
>> +
>> +struct ioctl_table_entry {
>> + const char *name;
>> + unsigned ioctl_cmd;
>> + int (*handler)(int fd, int argc, char *argv[]);
>> +};
>> +
>> +static struct ioctl_table_entry ioctls[] = {
>> + IOCTL_TABLE_ENTRY(GLOBAL_RSV, global_rsv_ioctl),
>> +};
>> +
>> +int
>> +main(int argc, char *argv[])
>> +{
>> + int fd;
>> + int ret;
>> + struct ioctl_table_entry *entry = NULL;
>> + int i;
>> +
>> + if (argc < 3) {
>> + fprintf(stderr,
>> + "usage: %s <fs mount point> <ioctl name> [args..]\n",
>> + argv[0]);
>> + return 1;
>> + }
>> +
>> + fd = open(argv[1], O_RDONLY|O_DIRECTORY);
>> + if (fd < 0) {
>> + perror(argv[1]);
>> + return 1;
>> + }
>> +
>> + for (i = 0; i < (sizeof(ioctls)/sizeof(ioctls[0])); i++) {
>> + if (strcmp(argv[2], ioctls[i].name) == 0) {
>> + entry = &ioctls[i];
>> + break;
>> + }
>> + }
>> +
>> + if (!entry) {
>> + fprintf(stderr, "ERROR: unknown ioctl %s\n", argv[2]);
>> + close(fd);
>> + return 1;
>> + }
>> +
>> + ret = entry->handler(fd, argc - 3, argv + 3);
>> + if (ret == -ENOTTY) {
>> + printf("Not implemented.\n");
>> + close(fd);
>> + return 0;
>> + } else if (ret) {
>> + fprintf(stderr, "ERROR: %s failed: %s\n",
>> + entry->name, strerror(-ret));
>> + close(fd);
>> + return 1;
>> + }
>> +
>> + close(fd);
>> + return 0;
>> +}
>> diff --git a/tests/btrfs/100 b/tests/btrfs/100
>> new file mode 100755
>> index 0000000..d2a40b4
>> --- /dev/null
>> +++ b/tests/btrfs/100
>> @@ -0,0 +1,92 @@
>> +#!/bin/bash
>> +# FA QA Test No. 100
>> +#
>> +# Test global metadata reservation reporting
>> +#
>> +# 1) Create empty file system
>> +# 2) Call the BTRFS_IOC_GLOBAL_RSV ioctl and confirm it is 0 < x < 10MB
>> +# 3) Read the /sys/fs/btrfs/<fsid>/allocation/global_rsv_reserved file
>> +# and confirm the value is 0 < x < 10 MB
>> +#
>> +#-----------------------------------------------------------------------
>> +# Copyright (c) 2013 SUSE, All Rights Reserved.
>> +#
>> +# 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.
>> +#
>> +# This program is distributed in the hope that it would 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, write the Free Software Foundation,
>> +# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
>> +#-----------------------------------------------------------------------
>> +
>> +seq=$(basename $0)
>> +seqres=$RESULT_DIR/$seq
>> +echo "== QA output created by $seq"
>> +
>> +here=$(pwd)
>> +tmp=/tmp/$$
>> +status=1
>> +
>> +# get standard environment, filters and checks
>> +. ./common/rc
>> +. ./common/filter.btrfs
>> +
>> +_supported_fs btrfs
>> +_supported_os Linux
>> +_require_scratch
>> +
>> +_scratch_mkfs > /dev/null 2>&1
>> +_scratch_mount
>> +
>> +fsid() {
>> + $BTRFS_UTIL_PROG filesystem show $1|awk '/uuid:/ {print $NF}'
>> +}
>
> This is the second place you use this, should go into common/rc or some other
> common place. Thanks,

Thanks for the review. I've posted an updated patchset that fixes these
and other issues.

-Jeff

--
Jeff Mahoney
SUSE Labs

[-- Attachment #1.2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 841 bytes --]

[-- Attachment #2: Type: text/plain, Size: 121 bytes --]