if (zsb)
zfsctl_destroy(sb->s_fs_info);
+ /*
+ * Wait for iput_async before entering evict_inodes in
+ * generic_shutdown_super. The reason we must finish before
+ * evict_inodes is when lazytime is on, or when zfs_purgedir calls
+ * zfs_zget, iput would bump i_count from 0 to 1. This would race
+ * with the i_count check in evict_inodes. This means it could
+ * destroy the inode while we are still using it.
+ *
+ * We wait for two passes. xattr directories in the first pass may
+ * add xattr entries in zfs_purgedir, so in the second pass we wait
+ * for them. We don't use taskq_wait here because it is a pool wide
+ * taskq. Other mounted filesystems can constantly do iput_async
+ * and there's no guarantee when taskq will be empty.
+ */
+ taskq_wait_outstanding(dsl_pool_iput_taskq(
+ dmu_objset_pool(zsb->z_os)), 0);
+ taskq_wait_outstanding(dsl_pool_iput_taskq(
+ dmu_objset_pool(zsb->z_os)), 0);
}
EXPORT_SYMBOL(zfs_preumount);