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| author |   Anand Jain <anand.jain@oracle.com> | 2021-08-24 13:05:21 +0800 |
|---|---|---|
| committer |   David Sterba <dsterba@suse.com> | 2021-10-26 19:08:00 +0200 |
| commit | b7cb29e666fe79dda5dbe5f57fb7c92413bf161c (patch) | |
| tree | 86ff639dad174866afda630b9b6414ef239c1cc5 /fs/btrfs/tree-log.c | |
| parent | btrfs: use latest_dev in btrfs_show_devname (diff) | |
| download | linux-rng-b7cb29e666fe79dda5dbe5f57fb7c92413bf161c.tar.xz linux-rng-b7cb29e666fe79dda5dbe5f57fb7c92413bf161c.zip | |
btrfs: update latest_dev when we create a sprout device
When we add a device to the seed filesystem (sprouting) it is a new
filesystem (and fsid) on the device added. Update the latest_dev so
that /proc/self/mounts shows the correct device.
Example:
$ btrfstune -S1 /dev/vg/seed
$ mount /dev/vg/seed /btrfs
mount: /btrfs: WARNING: device write-protected, mounted read-only.
$ cat /proc/self/mounts | grep btrfs
/dev/mapper/vg-seed /btrfs btrfs ro,relatime,space_cache,subvolid=5,subvol=/ 0 0
$ btrfs dev add -f /dev/vg/new /btrfs
Before:
$ cat /proc/self/mounts | grep btrfs
/dev/mapper/vg-seed /btrfs btrfs ro,relatime,space_cache,subvolid=5,subvol=/ 0 0
After:
$ cat /proc/self/mounts | grep btrfs
/dev/mapper/vg-new /btrfs btrfs ro,relatime,space_cache,subvolid=5,subvol=/ 0 0
Tested-by: Su Yue <l@damenly.su>
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/tree-log.c')
0 files changed, 0 insertions, 0 deletions