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-rw-r--r--net/smc/smc_core.h348
1 files changed, 293 insertions, 55 deletions
diff --git a/net/smc/smc_core.h b/net/smc/smc_core.h
index 234ae25f0025..285f9bd8e232 100644
--- a/net/smc/smc_core.h
+++ b/net/smc/smc_core.h
@@ -13,7 +13,10 @@
#define _SMC_CORE_H
#include <linux/atomic.h>
+#include <linux/smc.h>
+#include <linux/pci.h>
#include <rdma/ib_verbs.h>
+#include <net/genetlink.h>
#include "smc.h"
#include "smc_ib.h"
@@ -32,18 +35,23 @@ enum smc_lgr_role { /* possible roles of a link group */
};
enum smc_link_state { /* possible states of a link */
+ SMC_LNK_UNUSED, /* link is unused */
SMC_LNK_INACTIVE, /* link is inactive */
SMC_LNK_ACTIVATING, /* link is being activated */
SMC_LNK_ACTIVE, /* link is active */
- SMC_LNK_DELETING, /* link is being deleted */
};
#define SMC_WR_BUF_SIZE 48 /* size of work request buffer */
+#define SMC_WR_BUF_V2_SIZE 8192 /* size of v2 work request buffer */
struct smc_wr_buf {
u8 raw[SMC_WR_BUF_SIZE];
};
+struct smc_wr_v2_buf {
+ u8 raw[SMC_WR_BUF_V2_SIZE];
+};
+
#define SMC_WR_REG_MR_WAIT_TIME (5 * HZ)/* wait time for ib_wr_reg_mr result */
enum smc_wr_reg_state {
@@ -70,6 +78,8 @@ struct smc_rdma_wr { /* work requests per message
struct ib_rdma_wr wr_tx_rdma[SMC_MAX_RDMA_WRITES];
};
+#define SMC_LGR_ID_SIZE 4
+
struct smc_link {
struct smc_ib_device *smcibdev; /* ib-device */
u8 ibport; /* port - values 1 | 2 */
@@ -85,24 +95,34 @@ struct smc_link {
struct smc_rdma_sges *wr_tx_rdma_sges;/*RDMA WRITE gather meta data*/
struct smc_rdma_wr *wr_tx_rdmas; /* WR RDMA WRITE */
struct smc_wr_tx_pend *wr_tx_pends; /* WR send waiting for CQE */
+ struct completion *wr_tx_compl; /* WR send CQE completion */
/* above four vectors have wr_tx_cnt elements and use the same index */
+ struct ib_send_wr *wr_tx_v2_ib; /* WR send v2 meta data */
+ struct ib_sge *wr_tx_v2_sge; /* WR send v2 gather meta data*/
+ struct smc_wr_tx_pend *wr_tx_v2_pend; /* WR send v2 waiting for CQE */
dma_addr_t wr_tx_dma_addr; /* DMA address of wr_tx_bufs */
+ dma_addr_t wr_tx_v2_dma_addr; /* DMA address of v2 tx buf*/
atomic_long_t wr_tx_id; /* seq # of last sent WR */
unsigned long *wr_tx_mask; /* bit mask of used indexes */
u32 wr_tx_cnt; /* number of WR send buffers */
wait_queue_head_t wr_tx_wait; /* wait for free WR send buf */
+ atomic_t wr_tx_refcnt; /* tx refs to link */
struct smc_wr_buf *wr_rx_bufs; /* WR recv payload buffers */
struct ib_recv_wr *wr_rx_ibs; /* WR recv meta data */
struct ib_sge *wr_rx_sges; /* WR recv scatter meta data */
/* above three vectors have wr_rx_cnt elements and use the same index */
dma_addr_t wr_rx_dma_addr; /* DMA address of wr_rx_bufs */
+ dma_addr_t wr_rx_v2_dma_addr; /* DMA address of v2 rx buf*/
u64 wr_rx_id; /* seq # of last recv WR */
+ u64 wr_rx_id_compl; /* seq # of last completed WR */
u32 wr_rx_cnt; /* number of WR recv buffers */
unsigned long wr_rx_tstamp; /* jiffies when last buf rx */
+ wait_queue_head_t wr_rx_empty_wait; /* wait for RQ empty */
struct ib_reg_wr wr_reg; /* WR register memory region */
wait_queue_head_t wr_reg_wait; /* wait for wr_reg result */
+ atomic_t wr_reg_refcnt; /* reg refs to link */
enum smc_wr_reg_state wr_reg_state; /* state of wr_reg request */
u8 gid[SMC_GID_SIZE];/* gid matching used vlan id*/
@@ -115,34 +135,30 @@ struct smc_link {
u8 peer_mac[ETH_ALEN]; /* = gid[8:10||13:15] */
u8 peer_gid[SMC_GID_SIZE]; /* gid of peer*/
u8 link_id; /* unique # within link group */
+ u8 link_uid[SMC_LGR_ID_SIZE]; /* unique lnk id */
+ u8 peer_link_uid[SMC_LGR_ID_SIZE]; /* peer uid */
+ u8 link_idx; /* index in lgr link array */
+ u8 link_is_asym; /* is link asymmetric? */
+ u8 clearing : 1; /* link is being cleared */
+ refcount_t refcnt; /* link reference count */
+ struct smc_link_group *lgr; /* parent link group */
+ struct work_struct link_down_wrk; /* wrk to bring link down */
+ char ibname[IB_DEVICE_NAME_MAX]; /* ib device name */
+ int ndev_ifidx; /* network device ifindex */
enum smc_link_state state; /* state of link */
- struct workqueue_struct *llc_wq; /* single thread work queue */
- struct completion llc_confirm; /* wait for rx of conf link */
- struct completion llc_confirm_resp; /* wait 4 rx of cnf lnk rsp */
- int llc_confirm_rc; /* rc from confirm link msg */
- int llc_confirm_resp_rc; /* rc from conf_resp msg */
- struct completion llc_add; /* wait for rx of add link */
- struct completion llc_add_resp; /* wait for rx of add link rsp*/
struct delayed_work llc_testlink_wrk; /* testlink worker */
struct completion llc_testlink_resp; /* wait for rx of testlink */
int llc_testlink_time; /* testlink interval */
- struct completion llc_confirm_rkey; /* wait 4 rx of cnf rkey */
- int llc_confirm_rkey_rc; /* rc from cnf rkey msg */
- struct completion llc_delete_rkey; /* wait 4 rx of del rkey */
- int llc_delete_rkey_rc; /* rc from del rkey msg */
- struct mutex llc_delete_rkey_mutex; /* serialize usage */
+ atomic_t conn_cnt; /* connections on this link */
};
/* For now we just allow one parallel link per link group. The SMC protocol
* allows more (up to 8).
*/
-#define SMC_LINKS_PER_LGR_MAX 1
+#define SMC_LINKS_PER_LGR_MAX 3
#define SMC_SINGLE_LINK 0
-#define SMC_FIRST_CONTACT 1 /* first contact to a peer */
-#define SMC_REUSE_CONTACT 0 /* follow-on contact to a peer*/
-
/* tx/rx buffer list element for sndbufs list and rmbs list of a lgr */
struct smc_buf_desc {
struct list_head list;
@@ -150,25 +166,37 @@ struct smc_buf_desc {
struct page *pages;
int len; /* length of buffer */
u32 used; /* currently used / unused */
- u8 wr_reg : 1; /* mem region registered */
- u8 regerr : 1; /* err during registration */
union {
struct { /* SMC-R */
- struct sg_table sgt[SMC_LINKS_PER_LGR_MAX];
- /* virtual buffer */
- struct ib_mr *mr_rx[SMC_LINKS_PER_LGR_MAX];
- /* for rmb only: memory region
- * incl. rkey provided to peer
- */
- u32 order; /* allocation order */
+ struct sg_table sgt[SMC_LINKS_PER_LGR_MAX];
+ /* virtual buffer */
+ struct ib_mr *mr[SMC_LINKS_PER_LGR_MAX];
+ /* memory region: for rmb and
+ * vzalloced sndbuf
+ * incl. rkey provided to peer
+ * and lkey provided to local
+ */
+ u32 order; /* allocation order */
+
+ u8 is_conf_rkey;
+ /* confirm_rkey done */
+ u8 is_reg_mr[SMC_LINKS_PER_LGR_MAX];
+ /* mem region registered */
+ u8 is_map_ib[SMC_LINKS_PER_LGR_MAX];
+ /* mem region mapped to lnk */
+ u8 is_dma_need_sync;
+ u8 is_reg_err;
+ /* buffer registration err */
+ u8 is_vm;
+ /* virtually contiguous */
};
struct { /* SMC-D */
- unsigned short sba_idx;
- /* SBA index number */
- u64 token;
- /* DMB token number */
- dma_addr_t dma_addr;
- /* DMA address */
+ unsigned short sba_idx;
+ /* SBA index number */
+ u64 token;
+ /* DMB token number */
+ dma_addr_t dma_addr;
+ /* DMA address */
};
};
};
@@ -178,7 +206,6 @@ struct smc_rtoken { /* address/key of remote RMB */
u32 rkey;
};
-#define SMC_LGR_ID_SIZE 4
#define SMC_BUF_MIN_SIZE 16384 /* minimum size of an RMB */
#define SMC_RMBE_SIZES 16 /* number of distinct RMBE sizes */
/* theoretically, the RFC states that largest size would be 512K,
@@ -188,6 +215,35 @@ struct smc_rtoken { /* address/key of remote RMB */
struct smcd_dev;
+enum smc_lgr_type { /* redundancy state of lgr */
+ SMC_LGR_NONE, /* no active links, lgr to be deleted */
+ SMC_LGR_SINGLE, /* 1 active RNIC on each peer */
+ SMC_LGR_SYMMETRIC, /* 2 active RNICs on each peer */
+ SMC_LGR_ASYMMETRIC_PEER, /* local has 2, peer 1 active RNICs */
+ SMC_LGR_ASYMMETRIC_LOCAL, /* local has 1, peer 2 active RNICs */
+};
+
+enum smcr_buf_type { /* types of SMC-R sndbufs and RMBs */
+ SMCR_PHYS_CONT_BUFS = 0,
+ SMCR_VIRT_CONT_BUFS = 1,
+ SMCR_MIXED_BUFS = 2,
+};
+
+enum smc_llc_flowtype {
+ SMC_LLC_FLOW_NONE = 0,
+ SMC_LLC_FLOW_ADD_LINK = 2,
+ SMC_LLC_FLOW_DEL_LINK = 4,
+ SMC_LLC_FLOW_REQ_ADD_LINK = 5,
+ SMC_LLC_FLOW_RKEY = 6,
+};
+
+struct smc_llc_qentry;
+
+struct smc_llc_flow {
+ enum smc_llc_flowtype type;
+ struct smc_llc_qentry *qentry;
+};
+
struct smc_link_group {
struct list_head list;
struct rb_root conns_all; /* connection tree */
@@ -196,25 +252,35 @@ struct smc_link_group {
unsigned short vlan_id; /* vlan id of link group */
struct list_head sndbufs[SMC_RMBE_SIZES];/* tx buffers */
- rwlock_t sndbufs_lock; /* protects tx buffers */
+ struct mutex sndbufs_lock; /* protects tx buffers */
struct list_head rmbs[SMC_RMBE_SIZES]; /* rx buffers */
- rwlock_t rmbs_lock; /* protects rx buffers */
+ struct mutex rmbs_lock; /* protects rx buffers */
u8 id[SMC_LGR_ID_SIZE]; /* unique lgr id */
struct delayed_work free_work; /* delayed freeing of an lgr */
struct work_struct terminate_work; /* abnormal lgr termination */
+ struct workqueue_struct *tx_wq; /* wq for conn. tx workers */
u8 sync_err : 1; /* lgr no longer fits to peer */
u8 terminating : 1;/* lgr is terminating */
- u8 freefast : 1; /* free worker scheduled fast */
u8 freeing : 1; /* lgr is being freed */
+ refcount_t refcnt; /* lgr reference count */
bool is_smcd; /* SMC-R or SMC-D */
+ u8 smc_version;
+ u8 negotiated_eid[SMC_MAX_EID_LEN];
+ u8 peer_os; /* peer operating system */
+ u8 peer_smc_release;
+ u8 peer_hostname[SMC_MAX_HOSTNAME_LEN];
union {
struct { /* SMC-R */
enum smc_lgr_role role;
/* client or server */
struct smc_link lnk[SMC_LINKS_PER_LGR_MAX];
/* smc link */
+ struct smc_wr_v2_buf *wr_rx_buf_v2;
+ /* WR v2 recv payload buffer */
+ struct smc_wr_v2_buf *wr_tx_buf_v2;
+ /* WR v2 send payload buffer */
char peer_systemid[SMC_SYSTEMID_LEN];
/* unique system_id of peer */
struct smc_rtoken rtokens[SMC_RMBS_PER_LGR_MAX]
@@ -222,6 +288,43 @@ struct smc_link_group {
/* remote addr/key pairs */
DECLARE_BITMAP(rtokens_used_mask, SMC_RMBS_PER_LGR_MAX);
/* used rtoken elements */
+ u8 next_link_id;
+ enum smc_lgr_type type;
+ enum smcr_buf_type buf_type;
+ /* redundancy state */
+ u8 pnet_id[SMC_MAX_PNETID_LEN + 1];
+ /* pnet id of this lgr */
+ struct list_head llc_event_q;
+ /* queue for llc events */
+ spinlock_t llc_event_q_lock;
+ /* protects llc_event_q */
+ struct mutex llc_conf_mutex;
+ /* protects lgr reconfig. */
+ struct work_struct llc_add_link_work;
+ struct work_struct llc_del_link_work;
+ struct work_struct llc_event_work;
+ /* llc event worker */
+ wait_queue_head_t llc_flow_waiter;
+ /* w4 next llc event */
+ wait_queue_head_t llc_msg_waiter;
+ /* w4 next llc msg */
+ struct smc_llc_flow llc_flow_lcl;
+ /* llc local control field */
+ struct smc_llc_flow llc_flow_rmt;
+ /* llc remote control field */
+ struct smc_llc_qentry *delayed_event;
+ /* arrived when flow active */
+ spinlock_t llc_flow_lock;
+ /* protects llc flow */
+ int llc_testlink_time;
+ /* link keep alive time */
+ u32 llc_termination_rsn;
+ /* rsn code for termination */
+ u8 nexthop_mac[ETH_ALEN];
+ u8 uses_gateway;
+ __be32 saddr;
+ /* net namespace */
+ struct net *net;
};
struct { /* SMC-D */
u64 peer_gid;
@@ -236,20 +339,58 @@ struct smc_link_group {
struct smc_clc_msg_local;
+#define GID_LIST_SIZE 2
+
+struct smc_gidlist {
+ u8 len;
+ u8 list[GID_LIST_SIZE][SMC_GID_SIZE];
+};
+
+struct smc_init_info_smcrv2 {
+ /* Input fields */
+ __be32 saddr;
+ struct sock *clc_sk;
+ __be32 daddr;
+
+ /* Output fields when saddr is set */
+ struct smc_ib_device *ib_dev_v2;
+ u8 ib_port_v2;
+ u8 ib_gid_v2[SMC_GID_SIZE];
+
+ /* Additional output fields when clc_sk and daddr is set as well */
+ u8 uses_gateway;
+ u8 nexthop_mac[ETH_ALEN];
+
+ struct smc_gidlist gidlist;
+};
+
struct smc_init_info {
u8 is_smcd;
+ u8 smc_type_v1;
+ u8 smc_type_v2;
+ u8 first_contact_peer;
+ u8 first_contact_local;
unsigned short vlan_id;
- int srv_first_contact;
- int cln_first_contact;
+ u32 rc;
+ u8 negotiated_eid[SMC_MAX_EID_LEN];
/* SMC-R */
- struct smc_clc_msg_local *ib_lcl;
+ u8 smcr_version;
+ u8 check_smcrv2;
+ u8 peer_gid[SMC_GID_SIZE];
+ u8 peer_mac[ETH_ALEN];
+ u8 peer_systemid[SMC_SYSTEMID_LEN];
struct smc_ib_device *ib_dev;
u8 ib_gid[SMC_GID_SIZE];
u8 ib_port;
u32 ib_clcqpn;
+ struct smc_init_info_smcrv2 smcrv2;
/* SMC-D */
- u64 ism_gid;
- struct smcd_dev *ism_dev;
+ u64 ism_peer_gid[SMC_MAX_ISM_DEVS + 1];
+ struct smcd_dev *ism_dev[SMC_MAX_ISM_DEVS + 1];
+ u16 ism_chid[SMC_MAX_ISM_DEVS + 1];
+ u8 ism_offered_cnt; /* # of ISM devices offered */
+ u8 ism_selected; /* index of selected ISM dev*/
+ u8 smcd_version;
};
/* Find the connection associated with the given alert token in the link group.
@@ -285,34 +426,109 @@ static inline struct smc_connection *smc_lgr_find_conn(
return res;
}
-static inline void smc_lgr_terminate_sched(struct smc_link_group *lgr)
+static inline bool smc_conn_lgr_valid(struct smc_connection *conn)
{
- if (!lgr->terminating && !lgr->freeing)
- schedule_work(&lgr->terminate_work);
+ return conn->lgr && conn->alert_token_local;
+}
+
+/*
+ * Returns true if the specified link is usable.
+ *
+ * usable means the link is ready to receive RDMA messages, map memory
+ * on the link, etc. This doesn't ensure we are able to send RDMA messages
+ * on this link, if sending RDMA messages is needed, use smc_link_sendable()
+ */
+static inline bool smc_link_usable(struct smc_link *lnk)
+{
+ if (lnk->state == SMC_LNK_UNUSED || lnk->state == SMC_LNK_INACTIVE)
+ return false;
+ return true;
+}
+
+/*
+ * Returns true if the specified link is ready to receive AND send RDMA
+ * messages.
+ *
+ * For the client side in first contact, the underlying QP may still in
+ * RESET or RTR when the link state is ACTIVATING, checks in smc_link_usable()
+ * is not strong enough. For those places that need to send any CDC or LLC
+ * messages, use smc_link_sendable(), otherwise, use smc_link_usable() instead
+ */
+static inline bool smc_link_sendable(struct smc_link *lnk)
+{
+ return smc_link_usable(lnk) &&
+ lnk->qp_attr.cur_qp_state == IB_QPS_RTS;
+}
+
+static inline bool smc_link_active(struct smc_link *lnk)
+{
+ return lnk->state == SMC_LNK_ACTIVE;
+}
+
+static inline void smc_gid_be16_convert(__u8 *buf, u8 *gid_raw)
+{
+ sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x",
+ be16_to_cpu(((__be16 *)gid_raw)[0]),
+ be16_to_cpu(((__be16 *)gid_raw)[1]),
+ be16_to_cpu(((__be16 *)gid_raw)[2]),
+ be16_to_cpu(((__be16 *)gid_raw)[3]),
+ be16_to_cpu(((__be16 *)gid_raw)[4]),
+ be16_to_cpu(((__be16 *)gid_raw)[5]),
+ be16_to_cpu(((__be16 *)gid_raw)[6]),
+ be16_to_cpu(((__be16 *)gid_raw)[7]));
+}
+
+struct smc_pci_dev {
+ __u32 pci_fid;
+ __u16 pci_pchid;
+ __u16 pci_vendor;
+ __u16 pci_device;
+ __u8 pci_id[SMC_PCI_ID_STR_LEN];
+};
+
+static inline void smc_set_pci_values(struct pci_dev *pci_dev,
+ struct smc_pci_dev *smc_dev)
+{
+ smc_dev->pci_vendor = pci_dev->vendor;
+ smc_dev->pci_device = pci_dev->device;
+ snprintf(smc_dev->pci_id, sizeof(smc_dev->pci_id), "%s",
+ pci_name(pci_dev));
+#if IS_ENABLED(CONFIG_S390)
+ { /* Set s390 specific PCI information */
+ struct zpci_dev *zdev;
+
+ zdev = to_zpci(pci_dev);
+ smc_dev->pci_fid = zdev->fid;
+ smc_dev->pci_pchid = zdev->pchid;
+ }
+#endif
}
struct smc_sock;
struct smc_clc_msg_accept_confirm;
-struct smc_clc_msg_local;
-void smc_lgr_forget(struct smc_link_group *lgr);
-void smc_lgr_cleanup_early(struct smc_connection *conn);
-void smc_lgr_terminate(struct smc_link_group *lgr, bool soft);
-void smc_port_terminate(struct smc_ib_device *smcibdev, u8 ibport);
+void smc_lgr_cleanup_early(struct smc_link_group *lgr);
+void smc_lgr_terminate_sched(struct smc_link_group *lgr);
+void smc_lgr_hold(struct smc_link_group *lgr);
+void smc_lgr_put(struct smc_link_group *lgr);
+void smcr_port_add(struct smc_ib_device *smcibdev, u8 ibport);
+void smcr_port_err(struct smc_ib_device *smcibdev, u8 ibport);
void smc_smcd_terminate(struct smcd_dev *dev, u64 peer_gid,
unsigned short vlan);
void smc_smcd_terminate_all(struct smcd_dev *dev);
void smc_smcr_terminate_all(struct smc_ib_device *smcibdev);
int smc_buf_create(struct smc_sock *smc, bool is_smcd);
int smc_uncompress_bufsize(u8 compressed);
-int smc_rmb_rtoken_handling(struct smc_connection *conn,
+int smc_rmb_rtoken_handling(struct smc_connection *conn, struct smc_link *link,
struct smc_clc_msg_accept_confirm *clc);
-int smc_rtoken_add(struct smc_link_group *lgr, __be64 nw_vaddr, __be32 nw_rkey);
-int smc_rtoken_delete(struct smc_link_group *lgr, __be32 nw_rkey);
-void smc_sndbuf_sync_sg_for_cpu(struct smc_connection *conn);
+int smc_rtoken_add(struct smc_link *lnk, __be64 nw_vaddr, __be32 nw_rkey);
+int smc_rtoken_delete(struct smc_link *lnk, __be32 nw_rkey);
+void smc_rtoken_set(struct smc_link_group *lgr, int link_idx, int link_idx_new,
+ __be32 nw_rkey_known, __be64 nw_vaddr, __be32 nw_rkey);
+void smc_rtoken_set2(struct smc_link_group *lgr, int rtok_idx, int link_id,
+ __be64 nw_vaddr, __be32 nw_rkey);
void smc_sndbuf_sync_sg_for_device(struct smc_connection *conn);
void smc_rmb_sync_sg_for_cpu(struct smc_connection *conn);
-void smc_rmb_sync_sg_for_device(struct smc_connection *conn);
int smc_vlan_by_tcpsk(struct socket *clcsock, struct smc_init_info *ini);
void smc_conn_free(struct smc_connection *conn);
@@ -321,8 +537,30 @@ void smc_lgr_schedule_free_work_fast(struct smc_link_group *lgr);
int smc_core_init(void);
void smc_core_exit(void);
+int smcr_link_init(struct smc_link_group *lgr, struct smc_link *lnk,
+ u8 link_idx, struct smc_init_info *ini);
+void smcr_link_clear(struct smc_link *lnk, bool log);
+void smcr_link_hold(struct smc_link *lnk);
+void smcr_link_put(struct smc_link *lnk);
+void smc_switch_link_and_count(struct smc_connection *conn,
+ struct smc_link *to_lnk);
+int smcr_buf_map_lgr(struct smc_link *lnk);
+int smcr_buf_reg_lgr(struct smc_link *lnk);
+void smcr_lgr_set_type(struct smc_link_group *lgr, enum smc_lgr_type new_type);
+void smcr_lgr_set_type_asym(struct smc_link_group *lgr,
+ enum smc_lgr_type new_type, int asym_lnk_idx);
+int smcr_link_reg_buf(struct smc_link *link, struct smc_buf_desc *rmb_desc);
+struct smc_link *smc_switch_conns(struct smc_link_group *lgr,
+ struct smc_link *from_lnk, bool is_dev_err);
+void smcr_link_down_cond(struct smc_link *lnk);
+void smcr_link_down_cond_sched(struct smc_link *lnk);
+int smc_nl_get_sys_info(struct sk_buff *skb, struct netlink_callback *cb);
+int smcr_nl_get_lgr(struct sk_buff *skb, struct netlink_callback *cb);
+int smcr_nl_get_link(struct sk_buff *skb, struct netlink_callback *cb);
+int smcd_nl_get_lgr(struct sk_buff *skb, struct netlink_callback *cb);
+
static inline struct smc_link_group *smc_get_lgr(struct smc_link *link)
{
- return container_of(link, struct smc_link_group, lnk[SMC_SINGLE_LINK]);
+ return link->lgr;
}
#endif
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.