Hi Anand,
On 2013-11-15 05:34, Anand Jain wrote:
> This fixes the regression introduced with the patch
>
> btrfs-progs: avoid write to the disk before sure to create fs
>
> what happened with this patch is it missed the check to see if the
> user has the option set before pushing the defaults.
>
> Signed-off-by: Anand Jain <anand.j...@oracle.com>
> ---
> mkfs.c | 21 +++++++++++----------
> 1 files changed, 11 insertions(+), 10 deletions(-)
>
> diff --git a/mkfs.c b/mkfs.c
> index ec717be..2156150 100644
> --- a/mkfs.c
> +++ b/mkfs.c
> @@ -1359,17 +1359,13 @@ int main(int ac, char **av)
> if (is_vol_small(file)) {
> printf("SMALL VOLUME: forcing mixed metadata/data groups\n");
> mixed = 1;
> - if (metadata_profile != data_profile) {
> - if (metadata_profile_opt || data_profile_opt) {
> - fprintf(stderr,
> - "With mixed block groups data and metadata profiles must be the
> same\n");
> - exit(1);
> - }
> - }
> }
> +
> /*
> * Set default profiles according to number of added devices.
> - * For mixed groups defaults are single/single.
> + * For mixed groups defaults are single/single
> + * however if metadata_profile_opt || data_profile_opt is set
> + * metadata_profile and data_profile must be same
> */
> if (!mixed) {
> if (!metadata_profile_opt) {
> @@ -1387,8 +1383,13 @@ int main(int ac, char **av)
> BTRFS_BLOCK_GROUP_RAID0 : 0; /* raid0 or single
> */
> }
> } else {
> - metadata_profile = 0;
> - data_profile = 0;
> + if (metadata_profile_opt || data_profile_opt) {
> + if (metadata_profile != data_profile) {
> + fprintf(stderr,
> + "With mixed block groups data and metadata profiles must be the
> same\n");
Please prefix the error message with "ERROR: " otherwise is not so easy to
understand that this is an error message and that the filesystem was not
created.
> + exit(1);
> + }
> + }
> }
>
> ret = test_num_disk_vs_raid(metadata_profile, data_profile,
>
It works for me (see below), however I suggest to prefix the error message
"With mixed block group..." with the "ERROR" string, otherwise it is not so
obvious that
something went wrong.
-------
# test: make a raid1 filesystem in a small volume to force the "mixed" mode
# expected results: the volume must have a Data+Metadata, RAID1 chunk
# result: test PASSED
ghigo@venice:/tmp$ sudo ~/btrfs/btrfs-progs/mkfs.btrfs -K -m raid1 -d raid1
/dev/loop[01]
SMALL VOLUME: forcing mixed metadata/data groups
WARNING! - Btrfs v0.20-rc1-595-g9f0c53f IS EXPERIMENTAL
WARNING! - see http://btrfs.wiki.kernel.org before using
Turning ON incompat feature 'mixed-bg': mixed data and metadata block groups
Turning ON incompat feature 'extref': increased hardlink limit per file to 65536
Created a data/metadata chunk of size 8388608
adding device /dev/loop1 id 2
fs created label (null) on /dev/loop0
nodesize 4096 leafsize 4096 sectorsize 4096 size 202.00MiB
Btrfs v0.20-rc1-595-g9f0c53f
ghigo@venice:/tmp$ sudo mount /dev/loop0 /mnt/test
ghigo@venice:/tmp$ btrfs fi df /mnt/test/
System, RAID1: total=8.00MB, used=4.00KB
System: total=4.00MB, used=0.00
Data+Metadata, RAID1: total=64.00MB, used=28.00KB
Data+Metadata: total=8.00MB, used=0.00
ghigo@venice:/tmp$ sudo umount /mnt/test
# test: make a filesystem in a small volume to force the "mixed" mode
# with different profiles for data and metadata
# expected results: mkfs must fails with an error message
# result: test PASSED
ghigo@venice:/tmp$ sudo ~/btrfs/btrfs-progs/mkfs.btrfs -K -m dup -d raid1
/dev/loop[01]
SMALL VOLUME: forcing mixed metadata/data groups
With mixed block groups data and metadata profiles must be the same
BR
G.Baroncelli
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