/drivers/target/iscsi/iscsi_target_core.h

https://bitbucket.org/cyanogenmod/android_kernel_asus_tf300t · C Header · 858 lines · 667 code · 60 blank · 131 comment · 0 complexity · 8fa20aa7a7d4047bb89ba0671abafe2c MD5 · raw file

  1. #ifndef ISCSI_TARGET_CORE_H
  2. #define ISCSI_TARGET_CORE_H
  3. #include <linux/in.h>
  4. #include <linux/configfs.h>
  5. #include <net/sock.h>
  6. #include <net/tcp.h>
  7. #include <scsi/scsi_cmnd.h>
  8. #include <scsi/iscsi_proto.h>
  9. #include <target/target_core_base.h>
  10. #define ISCSIT_VERSION "v4.1.0-rc1"
  11. #define ISCSI_MAX_DATASN_MISSING_COUNT 16
  12. #define ISCSI_TX_THREAD_TCP_TIMEOUT 2
  13. #define ISCSI_RX_THREAD_TCP_TIMEOUT 2
  14. #define SECONDS_FOR_ASYNC_LOGOUT 10
  15. #define SECONDS_FOR_ASYNC_TEXT 10
  16. #define SECONDS_FOR_LOGOUT_COMP 15
  17. #define WHITE_SPACE " \t\v\f\n\r"
  18. /* struct iscsi_node_attrib sanity values */
  19. #define NA_DATAOUT_TIMEOUT 3
  20. #define NA_DATAOUT_TIMEOUT_MAX 60
  21. #define NA_DATAOUT_TIMEOUT_MIX 2
  22. #define NA_DATAOUT_TIMEOUT_RETRIES 5
  23. #define NA_DATAOUT_TIMEOUT_RETRIES_MAX 15
  24. #define NA_DATAOUT_TIMEOUT_RETRIES_MIN 1
  25. #define NA_NOPIN_TIMEOUT 5
  26. #define NA_NOPIN_TIMEOUT_MAX 60
  27. #define NA_NOPIN_TIMEOUT_MIN 3
  28. #define NA_NOPIN_RESPONSE_TIMEOUT 5
  29. #define NA_NOPIN_RESPONSE_TIMEOUT_MAX 60
  30. #define NA_NOPIN_RESPONSE_TIMEOUT_MIN 3
  31. #define NA_RANDOM_DATAIN_PDU_OFFSETS 0
  32. #define NA_RANDOM_DATAIN_SEQ_OFFSETS 0
  33. #define NA_RANDOM_R2T_OFFSETS 0
  34. #define NA_DEFAULT_ERL 0
  35. #define NA_DEFAULT_ERL_MAX 2
  36. #define NA_DEFAULT_ERL_MIN 0
  37. /* struct iscsi_tpg_attrib sanity values */
  38. #define TA_AUTHENTICATION 1
  39. #define TA_LOGIN_TIMEOUT 15
  40. #define TA_LOGIN_TIMEOUT_MAX 30
  41. #define TA_LOGIN_TIMEOUT_MIN 5
  42. #define TA_NETIF_TIMEOUT 2
  43. #define TA_NETIF_TIMEOUT_MAX 15
  44. #define TA_NETIF_TIMEOUT_MIN 2
  45. #define TA_GENERATE_NODE_ACLS 0
  46. #define TA_DEFAULT_CMDSN_DEPTH 16
  47. #define TA_DEFAULT_CMDSN_DEPTH_MAX 512
  48. #define TA_DEFAULT_CMDSN_DEPTH_MIN 1
  49. #define TA_CACHE_DYNAMIC_ACLS 0
  50. /* Enabled by default in demo mode (generic_node_acls=1) */
  51. #define TA_DEMO_MODE_WRITE_PROTECT 1
  52. /* Disabled by default in production mode w/ explict ACLs */
  53. #define TA_PROD_MODE_WRITE_PROTECT 0
  54. #define TA_CACHE_CORE_NPS 0
  55. enum tpg_np_network_transport_table {
  56. ISCSI_TCP = 0,
  57. ISCSI_SCTP_TCP = 1,
  58. ISCSI_SCTP_UDP = 2,
  59. ISCSI_IWARP_TCP = 3,
  60. ISCSI_IWARP_SCTP = 4,
  61. ISCSI_INFINIBAND = 5,
  62. };
  63. /* RFC-3720 7.1.4 Standard Connection State Diagram for a Target */
  64. enum target_conn_state_table {
  65. TARG_CONN_STATE_FREE = 0x1,
  66. TARG_CONN_STATE_XPT_UP = 0x3,
  67. TARG_CONN_STATE_IN_LOGIN = 0x4,
  68. TARG_CONN_STATE_LOGGED_IN = 0x5,
  69. TARG_CONN_STATE_IN_LOGOUT = 0x6,
  70. TARG_CONN_STATE_LOGOUT_REQUESTED = 0x7,
  71. TARG_CONN_STATE_CLEANUP_WAIT = 0x8,
  72. };
  73. /* RFC-3720 7.3.2 Session State Diagram for a Target */
  74. enum target_sess_state_table {
  75. TARG_SESS_STATE_FREE = 0x1,
  76. TARG_SESS_STATE_ACTIVE = 0x2,
  77. TARG_SESS_STATE_LOGGED_IN = 0x3,
  78. TARG_SESS_STATE_FAILED = 0x4,
  79. TARG_SESS_STATE_IN_CONTINUE = 0x5,
  80. };
  81. /* struct iscsi_data_count->type */
  82. enum data_count_type {
  83. ISCSI_RX_DATA = 1,
  84. ISCSI_TX_DATA = 2,
  85. };
  86. /* struct iscsi_datain_req->dr_complete */
  87. enum datain_req_comp_table {
  88. DATAIN_COMPLETE_NORMAL = 1,
  89. DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY = 2,
  90. DATAIN_COMPLETE_CONNECTION_RECOVERY = 3,
  91. };
  92. /* struct iscsi_datain_req->recovery */
  93. enum datain_req_rec_table {
  94. DATAIN_WITHIN_COMMAND_RECOVERY = 1,
  95. DATAIN_CONNECTION_RECOVERY = 2,
  96. };
  97. /* struct iscsi_portal_group->state */
  98. enum tpg_state_table {
  99. TPG_STATE_FREE = 0,
  100. TPG_STATE_ACTIVE = 1,
  101. TPG_STATE_INACTIVE = 2,
  102. TPG_STATE_COLD_RESET = 3,
  103. };
  104. /* struct iscsi_tiqn->tiqn_state */
  105. enum tiqn_state_table {
  106. TIQN_STATE_ACTIVE = 1,
  107. TIQN_STATE_SHUTDOWN = 2,
  108. };
  109. /* struct iscsi_cmd->cmd_flags */
  110. enum cmd_flags_table {
  111. ICF_GOT_LAST_DATAOUT = 0x00000001,
  112. ICF_GOT_DATACK_SNACK = 0x00000002,
  113. ICF_NON_IMMEDIATE_UNSOLICITED_DATA = 0x00000004,
  114. ICF_SENT_LAST_R2T = 0x00000008,
  115. ICF_WITHIN_COMMAND_RECOVERY = 0x00000010,
  116. ICF_CONTIG_MEMORY = 0x00000020,
  117. ICF_ATTACHED_TO_RQUEUE = 0x00000040,
  118. ICF_OOO_CMDSN = 0x00000080,
  119. ICF_REJECT_FAIL_CONN = 0x00000100,
  120. };
  121. /* struct iscsi_cmd->i_state */
  122. enum cmd_i_state_table {
  123. ISTATE_NO_STATE = 0,
  124. ISTATE_NEW_CMD = 1,
  125. ISTATE_DEFERRED_CMD = 2,
  126. ISTATE_UNSOLICITED_DATA = 3,
  127. ISTATE_RECEIVE_DATAOUT = 4,
  128. ISTATE_RECEIVE_DATAOUT_RECOVERY = 5,
  129. ISTATE_RECEIVED_LAST_DATAOUT = 6,
  130. ISTATE_WITHIN_DATAOUT_RECOVERY = 7,
  131. ISTATE_IN_CONNECTION_RECOVERY = 8,
  132. ISTATE_RECEIVED_TASKMGT = 9,
  133. ISTATE_SEND_ASYNCMSG = 10,
  134. ISTATE_SENT_ASYNCMSG = 11,
  135. ISTATE_SEND_DATAIN = 12,
  136. ISTATE_SEND_LAST_DATAIN = 13,
  137. ISTATE_SENT_LAST_DATAIN = 14,
  138. ISTATE_SEND_LOGOUTRSP = 15,
  139. ISTATE_SENT_LOGOUTRSP = 16,
  140. ISTATE_SEND_NOPIN = 17,
  141. ISTATE_SENT_NOPIN = 18,
  142. ISTATE_SEND_REJECT = 19,
  143. ISTATE_SENT_REJECT = 20,
  144. ISTATE_SEND_R2T = 21,
  145. ISTATE_SENT_R2T = 22,
  146. ISTATE_SEND_R2T_RECOVERY = 23,
  147. ISTATE_SENT_R2T_RECOVERY = 24,
  148. ISTATE_SEND_LAST_R2T = 25,
  149. ISTATE_SENT_LAST_R2T = 26,
  150. ISTATE_SEND_LAST_R2T_RECOVERY = 27,
  151. ISTATE_SENT_LAST_R2T_RECOVERY = 28,
  152. ISTATE_SEND_STATUS = 29,
  153. ISTATE_SEND_STATUS_BROKEN_PC = 30,
  154. ISTATE_SENT_STATUS = 31,
  155. ISTATE_SEND_STATUS_RECOVERY = 32,
  156. ISTATE_SENT_STATUS_RECOVERY = 33,
  157. ISTATE_SEND_TASKMGTRSP = 34,
  158. ISTATE_SENT_TASKMGTRSP = 35,
  159. ISTATE_SEND_TEXTRSP = 36,
  160. ISTATE_SENT_TEXTRSP = 37,
  161. ISTATE_SEND_NOPIN_WANT_RESPONSE = 38,
  162. ISTATE_SENT_NOPIN_WANT_RESPONSE = 39,
  163. ISTATE_SEND_NOPIN_NO_RESPONSE = 40,
  164. ISTATE_REMOVE = 41,
  165. ISTATE_FREE = 42,
  166. };
  167. /* Used for iscsi_recover_cmdsn() return values */
  168. enum recover_cmdsn_ret_table {
  169. CMDSN_ERROR_CANNOT_RECOVER = -1,
  170. CMDSN_NORMAL_OPERATION = 0,
  171. CMDSN_LOWER_THAN_EXP = 1,
  172. CMDSN_HIGHER_THAN_EXP = 2,
  173. };
  174. /* Used for iscsi_handle_immediate_data() return values */
  175. enum immedate_data_ret_table {
  176. IMMEDIATE_DATA_CANNOT_RECOVER = -1,
  177. IMMEDIATE_DATA_NORMAL_OPERATION = 0,
  178. IMMEDIATE_DATA_ERL1_CRC_FAILURE = 1,
  179. };
  180. /* Used for iscsi_decide_dataout_action() return values */
  181. enum dataout_action_ret_table {
  182. DATAOUT_CANNOT_RECOVER = -1,
  183. DATAOUT_NORMAL = 0,
  184. DATAOUT_SEND_R2T = 1,
  185. DATAOUT_SEND_TO_TRANSPORT = 2,
  186. DATAOUT_WITHIN_COMMAND_RECOVERY = 3,
  187. };
  188. /* Used for struct iscsi_node_auth->naf_flags */
  189. enum naf_flags_table {
  190. NAF_USERID_SET = 0x01,
  191. NAF_PASSWORD_SET = 0x02,
  192. NAF_USERID_IN_SET = 0x04,
  193. NAF_PASSWORD_IN_SET = 0x08,
  194. };
  195. /* Used by various struct timer_list to manage iSCSI specific state */
  196. enum iscsi_timer_flags_table {
  197. ISCSI_TF_RUNNING = 0x01,
  198. ISCSI_TF_STOP = 0x02,
  199. ISCSI_TF_EXPIRED = 0x04,
  200. };
  201. /* Used for struct iscsi_np->np_flags */
  202. enum np_flags_table {
  203. NPF_IP_NETWORK = 0x00,
  204. NPF_SCTP_STRUCT_FILE = 0x01 /* Bugfix */
  205. };
  206. /* Used for struct iscsi_np->np_thread_state */
  207. enum np_thread_state_table {
  208. ISCSI_NP_THREAD_ACTIVE = 1,
  209. ISCSI_NP_THREAD_INACTIVE = 2,
  210. ISCSI_NP_THREAD_RESET = 3,
  211. ISCSI_NP_THREAD_SHUTDOWN = 4,
  212. ISCSI_NP_THREAD_EXIT = 5,
  213. };
  214. struct iscsi_conn_ops {
  215. u8 HeaderDigest; /* [0,1] == [None,CRC32C] */
  216. u8 DataDigest; /* [0,1] == [None,CRC32C] */
  217. u32 MaxRecvDataSegmentLength; /* [512..2**24-1] */
  218. u8 OFMarker; /* [0,1] == [No,Yes] */
  219. u8 IFMarker; /* [0,1] == [No,Yes] */
  220. u32 OFMarkInt; /* [1..65535] */
  221. u32 IFMarkInt; /* [1..65535] */
  222. };
  223. struct iscsi_sess_ops {
  224. char InitiatorName[224];
  225. char InitiatorAlias[256];
  226. char TargetName[224];
  227. char TargetAlias[256];
  228. char TargetAddress[256];
  229. u16 TargetPortalGroupTag; /* [0..65535] */
  230. u16 MaxConnections; /* [1..65535] */
  231. u8 InitialR2T; /* [0,1] == [No,Yes] */
  232. u8 ImmediateData; /* [0,1] == [No,Yes] */
  233. u32 MaxBurstLength; /* [512..2**24-1] */
  234. u32 FirstBurstLength; /* [512..2**24-1] */
  235. u16 DefaultTime2Wait; /* [0..3600] */
  236. u16 DefaultTime2Retain; /* [0..3600] */
  237. u16 MaxOutstandingR2T; /* [1..65535] */
  238. u8 DataPDUInOrder; /* [0,1] == [No,Yes] */
  239. u8 DataSequenceInOrder; /* [0,1] == [No,Yes] */
  240. u8 ErrorRecoveryLevel; /* [0..2] */
  241. u8 SessionType; /* [0,1] == [Normal,Discovery]*/
  242. };
  243. struct iscsi_queue_req {
  244. int state;
  245. struct iscsi_cmd *cmd;
  246. struct list_head qr_list;
  247. };
  248. struct iscsi_data_count {
  249. int data_length;
  250. int sync_and_steering;
  251. enum data_count_type type;
  252. u32 iov_count;
  253. u32 ss_iov_count;
  254. u32 ss_marker_count;
  255. struct kvec *iov;
  256. };
  257. struct iscsi_param_list {
  258. struct list_head param_list;
  259. struct list_head extra_response_list;
  260. };
  261. struct iscsi_datain_req {
  262. enum datain_req_comp_table dr_complete;
  263. int generate_recovery_values;
  264. enum datain_req_rec_table recovery;
  265. u32 begrun;
  266. u32 runlength;
  267. u32 data_length;
  268. u32 data_offset;
  269. u32 data_offset_end;
  270. u32 data_sn;
  271. u32 next_burst_len;
  272. u32 read_data_done;
  273. u32 seq_send_order;
  274. struct list_head dr_list;
  275. } ____cacheline_aligned;
  276. struct iscsi_ooo_cmdsn {
  277. u16 cid;
  278. u32 batch_count;
  279. u32 cmdsn;
  280. u32 exp_cmdsn;
  281. struct iscsi_cmd *cmd;
  282. struct list_head ooo_list;
  283. } ____cacheline_aligned;
  284. struct iscsi_datain {
  285. u8 flags;
  286. u32 data_sn;
  287. u32 length;
  288. u32 offset;
  289. } ____cacheline_aligned;
  290. struct iscsi_r2t {
  291. int seq_complete;
  292. int recovery_r2t;
  293. int sent_r2t;
  294. u32 r2t_sn;
  295. u32 offset;
  296. u32 targ_xfer_tag;
  297. u32 xfer_len;
  298. struct list_head r2t_list;
  299. } ____cacheline_aligned;
  300. struct iscsi_cmd {
  301. enum iscsi_timer_flags_table dataout_timer_flags;
  302. /* DataOUT timeout retries */
  303. u8 dataout_timeout_retries;
  304. /* Within command recovery count */
  305. u8 error_recovery_count;
  306. /* iSCSI dependent state for out or order CmdSNs */
  307. enum cmd_i_state_table deferred_i_state;
  308. /* iSCSI dependent state */
  309. enum cmd_i_state_table i_state;
  310. /* Command is an immediate command (ISCSI_OP_IMMEDIATE set) */
  311. u8 immediate_cmd;
  312. /* Immediate data present */
  313. u8 immediate_data;
  314. /* iSCSI Opcode */
  315. u8 iscsi_opcode;
  316. /* iSCSI Response Code */
  317. u8 iscsi_response;
  318. /* Logout reason when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
  319. u8 logout_reason;
  320. /* Logout response code when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
  321. u8 logout_response;
  322. /* MaxCmdSN has been incremented */
  323. u8 maxcmdsn_inc;
  324. /* Immediate Unsolicited Dataout */
  325. u8 unsolicited_data;
  326. /* CID contained in logout PDU when opcode == ISCSI_INIT_LOGOUT_CMND */
  327. u16 logout_cid;
  328. /* Command flags */
  329. enum cmd_flags_table cmd_flags;
  330. /* Initiator Task Tag assigned from Initiator */
  331. u32 init_task_tag;
  332. /* Target Transfer Tag assigned from Target */
  333. u32 targ_xfer_tag;
  334. /* CmdSN assigned from Initiator */
  335. u32 cmd_sn;
  336. /* ExpStatSN assigned from Initiator */
  337. u32 exp_stat_sn;
  338. /* StatSN assigned to this ITT */
  339. u32 stat_sn;
  340. /* DataSN Counter */
  341. u32 data_sn;
  342. /* R2TSN Counter */
  343. u32 r2t_sn;
  344. /* Last DataSN acknowledged via DataAck SNACK */
  345. u32 acked_data_sn;
  346. /* Used for echoing NOPOUT ping data */
  347. u32 buf_ptr_size;
  348. /* Used to store DataDigest */
  349. u32 data_crc;
  350. /* Total size in bytes associated with command */
  351. u32 data_length;
  352. /* Counter for MaxOutstandingR2T */
  353. u32 outstanding_r2ts;
  354. /* Next R2T Offset when DataSequenceInOrder=Yes */
  355. u32 r2t_offset;
  356. /* Iovec current and orig count for iscsi_cmd->iov_data */
  357. u32 iov_data_count;
  358. u32 orig_iov_data_count;
  359. /* Number of miscellaneous iovecs used for IP stack calls */
  360. u32 iov_misc_count;
  361. /* Number of struct iscsi_pdu in struct iscsi_cmd->pdu_list */
  362. u32 pdu_count;
  363. /* Next struct iscsi_pdu to send in struct iscsi_cmd->pdu_list */
  364. u32 pdu_send_order;
  365. /* Current struct iscsi_pdu in struct iscsi_cmd->pdu_list */
  366. u32 pdu_start;
  367. /* Next struct iscsi_seq to send in struct iscsi_cmd->seq_list */
  368. u32 seq_send_order;
  369. /* Number of struct iscsi_seq in struct iscsi_cmd->seq_list */
  370. u32 seq_count;
  371. /* Current struct iscsi_seq in struct iscsi_cmd->seq_list */
  372. u32 seq_no;
  373. /* Lowest offset in current DataOUT sequence */
  374. u32 seq_start_offset;
  375. /* Highest offset in current DataOUT sequence */
  376. u32 seq_end_offset;
  377. /* Total size in bytes received so far of READ data */
  378. u32 read_data_done;
  379. /* Total size in bytes received so far of WRITE data */
  380. u32 write_data_done;
  381. /* Counter for FirstBurstLength key */
  382. u32 first_burst_len;
  383. /* Counter for MaxBurstLength key */
  384. u32 next_burst_len;
  385. /* Transfer size used for IP stack calls */
  386. u32 tx_size;
  387. /* Buffer used for various purposes */
  388. void *buf_ptr;
  389. /* See include/linux/dma-mapping.h */
  390. enum dma_data_direction data_direction;
  391. /* iSCSI PDU Header + CRC */
  392. unsigned char pdu[ISCSI_HDR_LEN + ISCSI_CRC_LEN];
  393. /* Number of times struct iscsi_cmd is present in immediate queue */
  394. atomic_t immed_queue_count;
  395. atomic_t response_queue_count;
  396. atomic_t transport_sent;
  397. spinlock_t datain_lock;
  398. spinlock_t dataout_timeout_lock;
  399. /* spinlock for protecting struct iscsi_cmd->i_state */
  400. spinlock_t istate_lock;
  401. /* spinlock for adding within command recovery entries */
  402. spinlock_t error_lock;
  403. /* spinlock for adding R2Ts */
  404. spinlock_t r2t_lock;
  405. /* DataIN List */
  406. struct list_head datain_list;
  407. /* R2T List */
  408. struct list_head cmd_r2t_list;
  409. struct completion reject_comp;
  410. /* Timer for DataOUT */
  411. struct timer_list dataout_timer;
  412. /* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */
  413. struct kvec *iov_data;
  414. /* Iovecs for miscellaneous purposes */
  415. #define ISCSI_MISC_IOVECS 5
  416. struct kvec iov_misc[ISCSI_MISC_IOVECS];
  417. /* Array of struct iscsi_pdu used for DataPDUInOrder=No */
  418. struct iscsi_pdu *pdu_list;
  419. /* Current struct iscsi_pdu used for DataPDUInOrder=No */
  420. struct iscsi_pdu *pdu_ptr;
  421. /* Array of struct iscsi_seq used for DataSequenceInOrder=No */
  422. struct iscsi_seq *seq_list;
  423. /* Current struct iscsi_seq used for DataSequenceInOrder=No */
  424. struct iscsi_seq *seq_ptr;
  425. /* TMR Request when iscsi_opcode == ISCSI_OP_SCSI_TMFUNC */
  426. struct iscsi_tmr_req *tmr_req;
  427. /* Connection this command is alligient to */
  428. struct iscsi_conn *conn;
  429. /* Pointer to connection recovery entry */
  430. struct iscsi_conn_recovery *cr;
  431. /* Session the command is part of, used for connection recovery */
  432. struct iscsi_session *sess;
  433. /* list_head for connection list */
  434. struct list_head i_list;
  435. /* The TCM I/O descriptor that is accessed via container_of() */
  436. struct se_cmd se_cmd;
  437. /* Sense buffer that will be mapped into outgoing status */
  438. #define ISCSI_SENSE_BUFFER_LEN (TRANSPORT_SENSE_BUFFER + 2)
  439. unsigned char sense_buffer[ISCSI_SENSE_BUFFER_LEN];
  440. struct scatterlist *t_mem_sg;
  441. u32 t_mem_sg_nents;
  442. u32 padding;
  443. u8 pad_bytes[4];
  444. struct scatterlist *first_data_sg;
  445. u32 first_data_sg_off;
  446. u32 kmapped_nents;
  447. } ____cacheline_aligned;
  448. struct iscsi_tmr_req {
  449. bool task_reassign:1;
  450. u32 ref_cmd_sn;
  451. u32 exp_data_sn;
  452. struct iscsi_conn_recovery *conn_recovery;
  453. struct se_tmr_req *se_tmr_req;
  454. };
  455. struct iscsi_conn {
  456. /* Authentication Successful for this connection */
  457. u8 auth_complete;
  458. /* State connection is currently in */
  459. u8 conn_state;
  460. u8 conn_logout_reason;
  461. u8 network_transport;
  462. enum iscsi_timer_flags_table nopin_timer_flags;
  463. enum iscsi_timer_flags_table nopin_response_timer_flags;
  464. u8 tx_immediate_queue;
  465. u8 tx_response_queue;
  466. /* Used to know what thread encountered a transport failure */
  467. u8 which_thread;
  468. /* connection id assigned by the Initiator */
  469. u16 cid;
  470. /* Remote TCP Port */
  471. u16 login_port;
  472. int net_size;
  473. u32 auth_id;
  474. #define CONNFLAG_SCTP_STRUCT_FILE 0x01
  475. u32 conn_flags;
  476. /* Used for iscsi_tx_login_rsp() */
  477. u32 login_itt;
  478. u32 exp_statsn;
  479. /* Per connection status sequence number */
  480. u32 stat_sn;
  481. /* IFMarkInt's Current Value */
  482. u32 if_marker;
  483. /* OFMarkInt's Current Value */
  484. u32 of_marker;
  485. /* Used for calculating OFMarker offset to next PDU */
  486. u32 of_marker_offset;
  487. /* Complete Bad PDU for sending reject */
  488. unsigned char bad_hdr[ISCSI_HDR_LEN];
  489. #define IPV6_ADDRESS_SPACE 48
  490. unsigned char login_ip[IPV6_ADDRESS_SPACE];
  491. int conn_usage_count;
  492. int conn_waiting_on_uc;
  493. atomic_t check_immediate_queue;
  494. atomic_t conn_logout_remove;
  495. atomic_t connection_exit;
  496. atomic_t connection_recovery;
  497. atomic_t connection_reinstatement;
  498. atomic_t connection_wait;
  499. atomic_t connection_wait_rcfr;
  500. atomic_t sleep_on_conn_wait_comp;
  501. atomic_t transport_failed;
  502. struct completion conn_post_wait_comp;
  503. struct completion conn_wait_comp;
  504. struct completion conn_wait_rcfr_comp;
  505. struct completion conn_waiting_on_uc_comp;
  506. struct completion conn_logout_comp;
  507. struct completion tx_half_close_comp;
  508. struct completion rx_half_close_comp;
  509. /* socket used by this connection */
  510. struct socket *sock;
  511. struct timer_list nopin_timer;
  512. struct timer_list nopin_response_timer;
  513. struct timer_list transport_timer;
  514. /* Spinlock used for add/deleting cmd's from conn_cmd_list */
  515. spinlock_t cmd_lock;
  516. spinlock_t conn_usage_lock;
  517. spinlock_t immed_queue_lock;
  518. spinlock_t nopin_timer_lock;
  519. spinlock_t response_queue_lock;
  520. spinlock_t state_lock;
  521. /* libcrypto RX and TX contexts for crc32c */
  522. struct hash_desc conn_rx_hash;
  523. struct hash_desc conn_tx_hash;
  524. /* Used for scheduling TX and RX connection kthreads */
  525. cpumask_var_t conn_cpumask;
  526. int conn_rx_reset_cpumask:1;
  527. int conn_tx_reset_cpumask:1;
  528. /* list_head of struct iscsi_cmd for this connection */
  529. struct list_head conn_cmd_list;
  530. struct list_head immed_queue_list;
  531. struct list_head response_queue_list;
  532. struct iscsi_conn_ops *conn_ops;
  533. struct iscsi_param_list *param_list;
  534. /* Used for per connection auth state machine */
  535. void *auth_protocol;
  536. struct iscsi_login_thread_s *login_thread;
  537. struct iscsi_portal_group *tpg;
  538. /* Pointer to parent session */
  539. struct iscsi_session *sess;
  540. /* Pointer to thread_set in use for this conn's threads */
  541. struct iscsi_thread_set *thread_set;
  542. /* list_head for session connection list */
  543. struct list_head conn_list;
  544. } ____cacheline_aligned;
  545. struct iscsi_conn_recovery {
  546. u16 cid;
  547. u32 cmd_count;
  548. u32 maxrecvdatasegmentlength;
  549. int ready_for_reallegiance;
  550. struct list_head conn_recovery_cmd_list;
  551. spinlock_t conn_recovery_cmd_lock;
  552. struct timer_list time2retain_timer;
  553. struct iscsi_session *sess;
  554. struct list_head cr_list;
  555. } ____cacheline_aligned;
  556. struct iscsi_session {
  557. u8 initiator_vendor;
  558. u8 isid[6];
  559. enum iscsi_timer_flags_table time2retain_timer_flags;
  560. u8 version_active;
  561. u16 cid_called;
  562. u16 conn_recovery_count;
  563. u16 tsih;
  564. /* state session is currently in */
  565. u32 session_state;
  566. /* session wide counter: initiator assigned task tag */
  567. u32 init_task_tag;
  568. /* session wide counter: target assigned task tag */
  569. u32 targ_xfer_tag;
  570. u32 cmdsn_window;
  571. /* protects cmdsn values */
  572. struct mutex cmdsn_mutex;
  573. /* session wide counter: expected command sequence number */
  574. u32 exp_cmd_sn;
  575. /* session wide counter: maximum allowed command sequence number */
  576. u32 max_cmd_sn;
  577. struct list_head sess_ooo_cmdsn_list;
  578. /* LIO specific session ID */
  579. u32 sid;
  580. char auth_type[8];
  581. /* unique within the target */
  582. int session_index;
  583. /* Used for session reference counting */
  584. int session_usage_count;
  585. int session_waiting_on_uc;
  586. u32 cmd_pdus;
  587. u32 rsp_pdus;
  588. u64 tx_data_octets;
  589. u64 rx_data_octets;
  590. u32 conn_digest_errors;
  591. u32 conn_timeout_errors;
  592. u64 creation_time;
  593. spinlock_t session_stats_lock;
  594. /* Number of active connections */
  595. atomic_t nconn;
  596. atomic_t session_continuation;
  597. atomic_t session_fall_back_to_erl0;
  598. atomic_t session_logout;
  599. atomic_t session_reinstatement;
  600. atomic_t session_stop_active;
  601. atomic_t sleep_on_sess_wait_comp;
  602. atomic_t transport_wait_cmds;
  603. /* connection list */
  604. struct list_head sess_conn_list;
  605. struct list_head cr_active_list;
  606. struct list_head cr_inactive_list;
  607. spinlock_t conn_lock;
  608. spinlock_t cr_a_lock;
  609. spinlock_t cr_i_lock;
  610. spinlock_t session_usage_lock;
  611. spinlock_t ttt_lock;
  612. struct completion async_msg_comp;
  613. struct completion reinstatement_comp;
  614. struct completion session_wait_comp;
  615. struct completion session_waiting_on_uc_comp;
  616. struct timer_list time2retain_timer;
  617. struct iscsi_sess_ops *sess_ops;
  618. struct se_session *se_sess;
  619. struct iscsi_portal_group *tpg;
  620. } ____cacheline_aligned;
  621. struct iscsi_login {
  622. u8 auth_complete;
  623. u8 checked_for_existing;
  624. u8 current_stage;
  625. u8 leading_connection;
  626. u8 first_request;
  627. u8 version_min;
  628. u8 version_max;
  629. char isid[6];
  630. u32 cmd_sn;
  631. u32 init_task_tag;
  632. u32 initial_exp_statsn;
  633. u32 rsp_length;
  634. u16 cid;
  635. u16 tsih;
  636. char *req;
  637. char *rsp;
  638. char *req_buf;
  639. char *rsp_buf;
  640. } ____cacheline_aligned;
  641. struct iscsi_node_attrib {
  642. u32 dataout_timeout;
  643. u32 dataout_timeout_retries;
  644. u32 default_erl;
  645. u32 nopin_timeout;
  646. u32 nopin_response_timeout;
  647. u32 random_datain_pdu_offsets;
  648. u32 random_datain_seq_offsets;
  649. u32 random_r2t_offsets;
  650. u32 tmr_cold_reset;
  651. u32 tmr_warm_reset;
  652. struct iscsi_node_acl *nacl;
  653. };
  654. struct se_dev_entry_s;
  655. struct iscsi_node_auth {
  656. enum naf_flags_table naf_flags;
  657. int authenticate_target;
  658. /* Used for iscsit_global->discovery_auth,
  659. * set to zero (auth disabled) by default */
  660. int enforce_discovery_auth;
  661. #define MAX_USER_LEN 256
  662. #define MAX_PASS_LEN 256
  663. char userid[MAX_USER_LEN];
  664. char password[MAX_PASS_LEN];
  665. char userid_mutual[MAX_USER_LEN];
  666. char password_mutual[MAX_PASS_LEN];
  667. };
  668. #include "iscsi_target_stat.h"
  669. struct iscsi_node_stat_grps {
  670. struct config_group iscsi_sess_stats_group;
  671. struct config_group iscsi_conn_stats_group;
  672. };
  673. struct iscsi_node_acl {
  674. struct iscsi_node_attrib node_attrib;
  675. struct iscsi_node_auth node_auth;
  676. struct iscsi_node_stat_grps node_stat_grps;
  677. struct se_node_acl se_node_acl;
  678. };
  679. #define NODE_STAT_GRPS(nacl) (&(nacl)->node_stat_grps)
  680. #define ISCSI_NODE_ATTRIB(t) (&(t)->node_attrib)
  681. #define ISCSI_NODE_AUTH(t) (&(t)->node_auth)
  682. struct iscsi_tpg_attrib {
  683. u32 authentication;
  684. u32 login_timeout;
  685. u32 netif_timeout;
  686. u32 generate_node_acls;
  687. u32 cache_dynamic_acls;
  688. u32 default_cmdsn_depth;
  689. u32 demo_mode_write_protect;
  690. u32 prod_mode_write_protect;
  691. struct iscsi_portal_group *tpg;
  692. };
  693. struct iscsi_np {
  694. int np_network_transport;
  695. int np_ip_proto;
  696. int np_sock_type;
  697. enum np_thread_state_table np_thread_state;
  698. enum iscsi_timer_flags_table np_login_timer_flags;
  699. u32 np_exports;
  700. enum np_flags_table np_flags;
  701. unsigned char np_ip[IPV6_ADDRESS_SPACE];
  702. u16 np_port;
  703. spinlock_t np_thread_lock;
  704. struct completion np_restart_comp;
  705. struct socket *np_socket;
  706. struct __kernel_sockaddr_storage np_sockaddr;
  707. struct task_struct *np_thread;
  708. struct timer_list np_login_timer;
  709. struct iscsi_portal_group *np_login_tpg;
  710. struct list_head np_list;
  711. } ____cacheline_aligned;
  712. struct iscsi_tpg_np {
  713. struct iscsi_np *tpg_np;
  714. struct iscsi_portal_group *tpg;
  715. struct iscsi_tpg_np *tpg_np_parent;
  716. struct list_head tpg_np_list;
  717. struct list_head tpg_np_child_list;
  718. struct list_head tpg_np_parent_list;
  719. struct se_tpg_np se_tpg_np;
  720. spinlock_t tpg_np_parent_lock;
  721. };
  722. struct iscsi_portal_group {
  723. unsigned char tpg_chap_id;
  724. /* TPG State */
  725. enum tpg_state_table tpg_state;
  726. /* Target Portal Group Tag */
  727. u16 tpgt;
  728. /* Id assigned to target sessions */
  729. u16 ntsih;
  730. /* Number of active sessions */
  731. u32 nsessions;
  732. /* Number of Network Portals available for this TPG */
  733. u32 num_tpg_nps;
  734. /* Per TPG LIO specific session ID. */
  735. u32 sid;
  736. /* Spinlock for adding/removing Network Portals */
  737. spinlock_t tpg_np_lock;
  738. spinlock_t tpg_state_lock;
  739. struct se_portal_group tpg_se_tpg;
  740. struct mutex tpg_access_lock;
  741. struct mutex np_login_lock;
  742. struct iscsi_tpg_attrib tpg_attrib;
  743. /* Pointer to default list of iSCSI parameters for TPG */
  744. struct iscsi_param_list *param_list;
  745. struct iscsi_tiqn *tpg_tiqn;
  746. struct list_head tpg_gnp_list;
  747. struct list_head tpg_list;
  748. } ____cacheline_aligned;
  749. #define ISCSI_TPG_C(c) ((struct iscsi_portal_group *)(c)->tpg)
  750. #define ISCSI_TPG_LUN(c, l) ((iscsi_tpg_list_t *)(c)->tpg->tpg_lun_list_t[l])
  751. #define ISCSI_TPG_S(s) ((struct iscsi_portal_group *)(s)->tpg)
  752. #define ISCSI_TPG_ATTRIB(t) (&(t)->tpg_attrib)
  753. #define SE_TPG(tpg) (&(tpg)->tpg_se_tpg)
  754. struct iscsi_wwn_stat_grps {
  755. struct config_group iscsi_stat_group;
  756. struct config_group iscsi_instance_group;
  757. struct config_group iscsi_sess_err_group;
  758. struct config_group iscsi_tgt_attr_group;
  759. struct config_group iscsi_login_stats_group;
  760. struct config_group iscsi_logout_stats_group;
  761. };
  762. struct iscsi_tiqn {
  763. #define ISCSI_IQN_LEN 224
  764. unsigned char tiqn[ISCSI_IQN_LEN];
  765. enum tiqn_state_table tiqn_state;
  766. int tiqn_access_count;
  767. u32 tiqn_active_tpgs;
  768. u32 tiqn_ntpgs;
  769. u32 tiqn_num_tpg_nps;
  770. u32 tiqn_nsessions;
  771. struct list_head tiqn_list;
  772. struct list_head tiqn_tpg_list;
  773. spinlock_t tiqn_state_lock;
  774. spinlock_t tiqn_tpg_lock;
  775. struct se_wwn tiqn_wwn;
  776. struct iscsi_wwn_stat_grps tiqn_stat_grps;
  777. int tiqn_index;
  778. struct iscsi_sess_err_stats sess_err_stats;
  779. struct iscsi_login_stats login_stats;
  780. struct iscsi_logout_stats logout_stats;
  781. } ____cacheline_aligned;
  782. #define WWN_STAT_GRPS(tiqn) (&(tiqn)->tiqn_stat_grps)
  783. struct iscsit_global {
  784. /* In core shutdown */
  785. u32 in_shutdown;
  786. u32 active_ts;
  787. /* Unique identifier used for the authentication daemon */
  788. u32 auth_id;
  789. u32 inactive_ts;
  790. /* Thread Set bitmap count */
  791. int ts_bitmap_count;
  792. /* Thread Set bitmap pointer */
  793. unsigned long *ts_bitmap;
  794. /* Used for iSCSI discovery session authentication */
  795. struct iscsi_node_acl discovery_acl;
  796. struct iscsi_portal_group *discovery_tpg;
  797. };
  798. #endif /* ISCSI_TARGET_CORE_H */