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From: David Sterba <dsterba@suse.cz>
To: Anand Jain <anand.jain@oracle.com>
Cc: linux-btrfs@vger.kernel.org, jeffm@suse.com, dsterba@suse.cz, clm@fb.com
Subject: Re: [PATCH 4/4] btrfs: create sprout should rename fsid on the sysfs as well
Date: Thu, 29 May 2014 14:54:22 +0200	[thread overview]
Message-ID: <20140529125422.GB29992@twin.jikos.cz> (raw)
In-Reply-To: <1401096626-13210-5-git-send-email-anand.jain@oracle.com>

On Mon, May 26, 2014 at 05:30:26PM +0800, Anand Jain wrote:
> --- a/fs/btrfs/volumes.c
> +++ b/fs/btrfs/volumes.c
> @@ -2084,6 +2084,7 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
>  	mutex_unlock(&root->fs_info->fs_devices->device_list_mutex);
>  
>  	if (seeding_dev) {
> +		char fsid_buf[37];

Is there a symbolic constant available? We have one in userspace, but I
can't find one for kernel, only a few locally defined.

>  		ret = init_first_rw_device(trans, root, device);
>  		if (ret) {
>  			btrfs_abort_transaction(trans, root, ret);
> @@ -2094,6 +2095,13 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
>  			btrfs_abort_transaction(trans, root, ret);
>  			goto error_trans;
>  		}
> +
> +		/* Sprouting would change fsid of the mounted root,
> +		 * so rename the fsid on the sysfs
> +		 */
> +		sprintf(fsid_buf, "%pU", root->fs_info->fsid);

Would be better do use snprintf explicitly.

> +		if (kobject_rename(&root->fs_info->super_kobj, fsid_buf))
> +			goto error_trans;
>  	} else {

Otherwise ok.

  reply	other threads:[~2014-05-29 12:54 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-05-26  9:30 [PATCH 0/4] update sysfs per btrfs device operations Anand Jain
2014-05-26  9:30 ` [PATCH 1/4] btrfs: dev delete should remove sysfs entry Anand Jain
2014-05-29 13:04   ` David Sterba
2014-05-30  6:10     ` Anand Jain
2014-05-30 14:10       ` David Sterba
2014-05-26  9:30 ` [PATCH 2/4] btrfs: dev add should add its " Anand Jain
2014-05-29 14:49   ` David Sterba
2014-05-26  9:30 ` [PATCH 3/4] btrfs: dev replace should replace the " Anand Jain
2014-05-29 13:29   ` David Sterba
2014-05-30  7:40     ` Anand Jain
2014-06-03  3:47       ` Anand Jain
2014-06-03 13:39         ` David Sterba
2014-05-26  9:30 ` [PATCH 4/4] btrfs: create sprout should rename fsid on the sysfs as well Anand Jain
2014-05-29 12:54   ` David Sterba [this message]
2014-06-02  8:22     ` Anand Jain
2014-06-02 15:39       ` David Sterba
2014-06-03  0:27         ` Anand Jain
2014-05-28  8:30 ` [PATCH RFC v2] btrfs: revamp /sys/fs/btrfs/<fsid>/devices Anand Jain

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