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btrfs: sysfs: export currently running exclusive operation

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/sys/fs/<fsid>/exclusive_operation contains the currently executing
exclusive operation. Add a sysfs_notify() when operation end, so
userspace can be notified of exclusive operation is finished.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Goldwyn Rodrigues
2020-08-25 10:02:33 -05:00
committed by David Sterba
parent c3e1f96c37
commit 66a2823c54
2 changed files with 38 additions and 0 deletions
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fs/btrfs/ioctl.c
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@@ -387,6 +387,7 @@ bool btrfs_exclop_start(struct btrfs_fs_info *fs_info,
void btrfs_exclop_finish(struct btrfs_fs_info *fs_info)
{
WRITE_ONCE(fs_info->exclusive_operation, BTRFS_EXCLOP_NONE);
sysfs_notify(&fs_info->fs_devices->fsid_kobj, NULL, "exclusive_operation");
}
/*