/*
* Attempt to expire an automounted snapshot, unmounts are attempted every
* 'zfs_expire_snapshot' seconds until they succeed. The work request is
* responsible for rescheduling itself and freeing the zfs_expire_snapshot_t.
*/
static void
zfsctl_expire_snapshot(void *data)
{
zfs_snapentry_t *sep = (zfs_snapentry_t *)data;
zfs_sb_t *zsb = ITOZSB(sep->se_inode);
int error;
error = zfsctl_unmount_snapshot(zsb, sep->se_name, MNT_EXPIRE);
if (error == EBUSY)
sep->se_taskqid = taskq_dispatch_delay(zfs_expire_taskq,
zfsctl_expire_snapshot, sep, TQ_SLEEP,
ddi_get_lbolt() + zfs_expire_snapshot * HZ);
}
/*
* Attempt to expire an automounted snapshot, unmounts are attempted every
* 'zfs_expire_snapshot' seconds until they succeed. The work request is
* responsible for rescheduling itself and freeing the zfs_expire_snapshot_t.
*/
static void
zfsctl_expire_snapshot(void *data)
{
zfs_snapentry_t *sep;
zfs_sb_t *zsb;
int error;
sep = spl_get_work_data(data, zfs_snapentry_t, se_work.work);
zsb = ITOZSB(sep->se_inode);
error = zfsctl_unmount_snapshot(zsb, sep->se_name, MNT_EXPIRE);
if (error == EBUSY)
schedule_delayed_work(&sep->se_work, zfs_expire_snapshot * HZ);
}
/* ARGSUSED */
int
zfsctl_snapdir_remove(struct inode *dip, char *name, cred_t *cr, int flags)
{
zfs_sb_t *zsb = ITOZSB(dip);
char *snapname, *real;
int error;
ZFS_ENTER(zsb);
snapname = kmem_alloc(MAXNAMELEN, KM_SLEEP);
real = kmem_alloc(MAXNAMELEN, KM_SLEEP);
if (zsb->z_case == ZFS_CASE_INSENSITIVE) {
error = dmu_snapshot_realname(zsb->z_os, name, real,
MAXNAMELEN, NULL);
if (error == 0) {
name = real;
} else if (error != ENOTSUP) {
goto out;
}
}
error = zfsctl_snapshot_zname(dip, name, MAXNAMELEN, snapname);
if (!error)
error = zfs_secpolicy_destroy_perms(snapname, cr);
if (error)
goto out;
error = zfsctl_unmount_snapshot(zsb, name, MNT_FORCE);
if ((error == 0) || (error == ENOENT))
error = dmu_objset_destroy(snapname, B_FALSE);
out:
kmem_free(snapname, MAXNAMELEN);
kmem_free(real, MAXNAMELEN);
ZFS_EXIT(zsb);
return (error);
}
