From: Anand Jain <anand.jain@oracle.com>
To: linux-btrfs@vger.kernel.org
Subject: [PATCH v2 4/4] btrfs: update latest_dev when we sprout
Date: Fri, 20 Aug 2021 17:54:12 +0800 [thread overview]
Message-ID: <1e53559c7651fa4dd8897ee933dbddc9df8f4c57.1629452691.git.anand.jain@oracle.com> (raw)
In-Reply-To: <cover.1629452691.git.anand.jain@oracle.com>
When we add a device to the seed filesystem (sprouting) it is a new
filesystem (and fsid) on the device added. Update the latest_device so
that /proc/self/mounts shows the correct device.
For example:
$ btrfstune -S1 /dev/vg/scratch1
$ mount /dev/vg/scratch1 /btrfs
mount: /btrfs: WARNING: device write-protected, mounted read-only.
$ cat /proc/self/mounts | grep btrfs
/dev/mapper/vg-scratch1 /btrfs btrfs ro,relatime,space_cache,subvolid=5,subvol=/ 0 0
$ btrfs dev add -f /dev/vg/scratch0 /btrfs
Before:
$ cat /proc/self/mounts | grep btrfs
/dev/mapper/vg-scratch1 /btrfs btrfs ro,relatime,space_cache,subvolid=5,subvol=/ 0 0
After:
$ cat /proc/self/mounts | grep btrfs
/dev/mapper/vg-scratch0 /btrfs btrfs ro,relatime,space_cache,subvolid=5,subvol=/ 0 0
Signed-off-by: Anand Jain <anand.jain@oracle.com>
---
v2: born
fs/btrfs/volumes.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 958503c8a854..1d1204547e72 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2597,6 +2597,8 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
btrfs_abort_transaction(trans, ret);
goto error_trans;
}
+ btrfs_assign_next_active_device(fs_info->fs_devices->latest_dev,
+ device);
}
device->fs_devices = fs_devices;
--
2.31.1
prev parent reply other threads:[~2021-08-20 9:54 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-20 9:54 [PATCH v2 0/4] btrf_show_devname related fixes Anand Jain
2021-08-20 9:54 ` [PATCH RFC v2 1/4] btrfs: consolidate device_list_mutex in prepare_sprout to its parent Anand Jain
2021-08-20 9:54 ` [PATCH v2 2/4] btrfs: save latest btrfs_device instead of its block_device in fs_devices Anand Jain
2021-08-20 9:54 ` [PATCH RFC v2 3/4] btrfs: use latest_dev in btrfs_show_devname Anand Jain
2021-08-20 11:06 ` Anand Jain
2021-08-20 9:54 ` Anand Jain [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1e53559c7651fa4dd8897ee933dbddc9df8f4c57.1629452691.git.anand.jain@oracle.com \
--to=anand.jain@oracle.com \
--cc=linux-btrfs@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).