On 2018年02月13日 11:53, Anand Jain wrote:
> For forensic investigations of issues, we would want to know
> if and when the user cancels the replace.
>
> Signed-off-by: Anand Jain <anand.jain@xxxxxxxxxx>> ---
> v1->v2: use btrfs_dev_name() instead of rcu_str_deref()
> as btrfs_dev_name() also provides "missing" string,
> if needed.
Would you please provide the branch you're using?
As I couldn't find the function or macro of btrfs_dev_name()
Thanks,
Qu
>
> fs/btrfs/dev-replace.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c
> index dd717e204b5e..3b0760f7ec8a 100644
> --- a/fs/btrfs/dev-replace.c
> +++ b/fs/btrfs/dev-replace.c
> @@ -703,6 +703,7 @@ int btrfs_dev_replace_cancel(struct btrfs_fs_info *fs_info)
> {
> struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;
> struct btrfs_device *tgt_device = NULL;
> + struct btrfs_device *src_device = NULL;
> struct btrfs_trans_handle *trans;
> struct btrfs_root *root = fs_info->tree_root;
> int result;
> @@ -724,6 +725,7 @@ int btrfs_dev_replace_cancel(struct btrfs_fs_info *fs_info)
> case BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED:
> result = BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR;
> tgt_device = dev_replace->tgtdev;
> + src_device = dev_replace->srcdev;
> dev_replace->tgtdev = NULL;
> dev_replace->srcdev = NULL;
> break;
> @@ -741,6 +743,11 @@ int btrfs_dev_replace_cancel(struct btrfs_fs_info *fs_info)
> }
> ret = btrfs_commit_transaction(trans);
> WARN_ON(ret);
> +
> + btrfs_info(fs_info, "dev_replace from %s (devid %llu) to %s canceled",
> + btrfs_dev_name(src_device), src_device->devid,
> + btrfs_dev_name(tgt_device));
> +
> if (tgt_device)
> btrfs_destroy_dev_replace_tgtdev(fs_info, tgt_device);
>
>
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