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btrfs: ioctl: resize: only show message if size is changed 

There is no point to inform the user about size change if there's none.
Update the message to conform to a commonly used format where the path
and devid are printed and also print old and new sizes.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Marcos Paulo de Souza <marcos@mpdesouza.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ enhance message ]
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Marcos Paulo de Souza 2020-02-11 10:55:26 -03:00 committed by David Sterba
parent b82582d668
commit faf8f7b957
1 changed files with 5 additions and 3 deletions
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8
fs/btrfs/ioctl.c
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@ -1710,9 +1710,6 @@ static noinline int btrfs_ioctl_resize(struct file *file,
new_size = round_down(new_size, fs_info->sectorsize);
btrfs_info_in_rcu(fs_info, "new size for %s is %llu",
rcu_str_deref(device->name), new_size);
if (new_size > old_size) {
trans = btrfs_start_transaction(root, 0);
if (IS_ERR(trans)) {
@ -1725,6 +1722,11 @@ static noinline int btrfs_ioctl_resize(struct file *file,
ret = btrfs_shrink_device(device, new_size);
} /* equal, nothing need to do */
if (ret == 0 && new_size != old_size)
btrfs_info_in_rcu(fs_info,
"resize device %s (devid %llu) from %llu to %llu",
rcu_str_deref(device->name), device->devid,
old_size, new_size);
out_free:
kfree(vol_args);
out: