forcedeth: fix rx error policy
[linux-2.6] / drivers / s390 / scsi / zfcp_fsf.h
1 /*
2  * zfcp device driver
3  *
4  * Interface to the FSF support functions.
5  *
6  * Copyright IBM Corporation 2002, 2008
7  */
8
9 #ifndef FSF_H
10 #define FSF_H
11
12 #include <linux/pfn.h>
13
14 #define FSF_QTCB_CURRENT_VERSION                0x00000001
15
16 /* FSF commands */
17 #define FSF_QTCB_FCP_CMND                       0x00000001
18 #define FSF_QTCB_ABORT_FCP_CMND                 0x00000002
19 #define FSF_QTCB_OPEN_PORT_WITH_DID             0x00000005
20 #define FSF_QTCB_OPEN_LUN                       0x00000006
21 #define FSF_QTCB_CLOSE_LUN                      0x00000007
22 #define FSF_QTCB_CLOSE_PORT                     0x00000008
23 #define FSF_QTCB_CLOSE_PHYSICAL_PORT            0x00000009
24 #define FSF_QTCB_SEND_ELS                       0x0000000B
25 #define FSF_QTCB_SEND_GENERIC                   0x0000000C
26 #define FSF_QTCB_EXCHANGE_CONFIG_DATA           0x0000000D
27 #define FSF_QTCB_EXCHANGE_PORT_DATA             0x0000000E
28 #define FSF_QTCB_DOWNLOAD_CONTROL_FILE          0x00000012
29 #define FSF_QTCB_UPLOAD_CONTROL_FILE            0x00000013
30
31 /* FSF QTCB types */
32 #define FSF_IO_COMMAND                          0x00000001
33 #define FSF_SUPPORT_COMMAND                     0x00000002
34 #define FSF_CONFIG_COMMAND                      0x00000003
35 #define FSF_PORT_COMMAND                        0x00000004
36
37 /* FSF control file upload/download operations' subtype and options */
38 #define FSF_CFDC_OPERATION_SUBTYPE              0x00020001
39 #define FSF_CFDC_OPTION_NORMAL_MODE             0x00000000
40 #define FSF_CFDC_OPTION_FORCE                   0x00000001
41 #define FSF_CFDC_OPTION_FULL_ACCESS             0x00000002
42 #define FSF_CFDC_OPTION_RESTRICTED_ACCESS       0x00000004
43
44 /* FSF protocol states */
45 #define FSF_PROT_GOOD                           0x00000001
46 #define FSF_PROT_QTCB_VERSION_ERROR             0x00000010
47 #define FSF_PROT_SEQ_NUMB_ERROR                 0x00000020
48 #define FSF_PROT_UNSUPP_QTCB_TYPE               0x00000040
49 #define FSF_PROT_HOST_CONNECTION_INITIALIZING   0x00000080
50 #define FSF_PROT_FSF_STATUS_PRESENTED           0x00000100
51 #define FSF_PROT_DUPLICATE_REQUEST_ID           0x00000200
52 #define FSF_PROT_LINK_DOWN                      0x00000400
53 #define FSF_PROT_REEST_QUEUE                    0x00000800
54 #define FSF_PROT_ERROR_STATE                    0x01000000
55
56 /* FSF states */
57 #define FSF_GOOD                                0x00000000
58 #define FSF_PORT_ALREADY_OPEN                   0x00000001
59 #define FSF_LUN_ALREADY_OPEN                    0x00000002
60 #define FSF_PORT_HANDLE_NOT_VALID               0x00000003
61 #define FSF_LUN_HANDLE_NOT_VALID                0x00000004
62 #define FSF_HANDLE_MISMATCH                     0x00000005
63 #define FSF_SERVICE_CLASS_NOT_SUPPORTED         0x00000006
64 #define FSF_FCPLUN_NOT_VALID                    0x00000009
65 #define FSF_ACCESS_DENIED                       0x00000010
66 #define FSF_LUN_SHARING_VIOLATION               0x00000012
67 #define FSF_FCP_COMMAND_DOES_NOT_EXIST          0x00000022
68 #define FSF_DIRECTION_INDICATOR_NOT_VALID       0x00000030
69 #define FSF_CMND_LENGTH_NOT_VALID               0x00000033
70 #define FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED    0x00000040
71 #define FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED     0x00000041
72 #define FSF_ELS_COMMAND_REJECTED                0x00000050
73 #define FSF_GENERIC_COMMAND_REJECTED            0x00000051
74 #define FSF_OPERATION_PARTIALLY_SUCCESSFUL      0x00000052
75 #define FSF_AUTHORIZATION_FAILURE               0x00000053
76 #define FSF_CFDC_ERROR_DETECTED                 0x00000054
77 #define FSF_CONTROL_FILE_UPDATE_ERROR           0x00000055
78 #define FSF_CONTROL_FILE_TOO_LARGE              0x00000056
79 #define FSF_ACCESS_CONFLICT_DETECTED            0x00000057
80 #define FSF_CONFLICTS_OVERRULED                 0x00000058
81 #define FSF_PORT_BOXED                          0x00000059
82 #define FSF_LUN_BOXED                           0x0000005A
83 #define FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE     0x0000005B
84 #define FSF_PAYLOAD_SIZE_MISMATCH               0x00000060
85 #define FSF_REQUEST_SIZE_TOO_LARGE              0x00000061
86 #define FSF_RESPONSE_SIZE_TOO_LARGE             0x00000062
87 #define FSF_SBAL_MISMATCH                       0x00000063
88 #define FSF_OPEN_PORT_WITHOUT_PRLI              0x00000064
89 #define FSF_ADAPTER_STATUS_AVAILABLE            0x000000AD
90 #define FSF_FCP_RSP_AVAILABLE                   0x000000AF
91 #define FSF_UNKNOWN_COMMAND                     0x000000E2
92 #define FSF_UNKNOWN_OP_SUBTYPE                  0x000000E3
93 #define FSF_INVALID_COMMAND_OPTION              0x000000E5
94 /* #define FSF_ERROR                             0x000000FF  */
95
96 #define FSF_PROT_STATUS_QUAL_SIZE               16
97 #define FSF_STATUS_QUALIFIER_SIZE               16
98
99 /* FSF status qualifier, recommendations */
100 #define FSF_SQ_NO_RECOM                         0x00
101 #define FSF_SQ_FCP_RSP_AVAILABLE                0x01
102 #define FSF_SQ_RETRY_IF_POSSIBLE                0x02
103 #define FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED       0x03
104 #define FSF_SQ_INVOKE_LINK_TEST_PROCEDURE       0x04
105 #define FSF_SQ_ULP_PROGRAMMING_ERROR            0x05
106 #define FSF_SQ_COMMAND_ABORTED                  0x06
107 #define FSF_SQ_NO_RETRY_POSSIBLE                0x07
108
109 /* FSF status qualifier for CFDC commands */
110 #define FSF_SQ_CFDC_HARDENED_ON_SE              0x00000000
111 #define FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE      0x00000001
112 #define FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE2     0x00000002
113 /* CFDC subtable codes */
114 #define FSF_SQ_CFDC_SUBTABLE_OS                 0x0001
115 #define FSF_SQ_CFDC_SUBTABLE_PORT_WWPN          0x0002
116 #define FSF_SQ_CFDC_SUBTABLE_PORT_DID           0x0003
117 #define FSF_SQ_CFDC_SUBTABLE_LUN                0x0004
118
119 /* FSF status qualifier (most significant 4 bytes), local link down */
120 #define FSF_PSQ_LINK_NO_LIGHT                   0x00000004
121 #define FSF_PSQ_LINK_WRAP_PLUG                  0x00000008
122 #define FSF_PSQ_LINK_NO_FCP                     0x00000010
123 #define FSF_PSQ_LINK_FIRMWARE_UPDATE            0x00000020
124 #define FSF_PSQ_LINK_INVALID_WWPN               0x00000100
125 #define FSF_PSQ_LINK_NO_NPIV_SUPPORT            0x00000200
126 #define FSF_PSQ_LINK_NO_FCP_RESOURCES           0x00000400
127 #define FSF_PSQ_LINK_NO_FABRIC_RESOURCES        0x00000800
128 #define FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE        0x00001000
129 #define FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED  0x00002000
130 #define FSF_PSQ_LINK_MODE_TABLE_CURRUPTED       0x00004000
131 #define FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT         0x00008000
132
133 /* payload size in status read buffer */
134 #define FSF_STATUS_READ_PAYLOAD_SIZE            4032
135
136 /* number of status read buffers that should be sent by ULP */
137 #define FSF_STATUS_READS_RECOM                  16
138
139 /* status types in status read buffer */
140 #define FSF_STATUS_READ_PORT_CLOSED             0x00000001
141 #define FSF_STATUS_READ_INCOMING_ELS            0x00000002
142 #define FSF_STATUS_READ_SENSE_DATA_AVAIL        0x00000003
143 #define FSF_STATUS_READ_BIT_ERROR_THRESHOLD     0x00000004
144 #define FSF_STATUS_READ_LINK_DOWN               0x00000005
145 #define FSF_STATUS_READ_LINK_UP                 0x00000006
146 #define FSF_STATUS_READ_NOTIFICATION_LOST       0x00000009
147 #define FSF_STATUS_READ_CFDC_UPDATED            0x0000000A
148 #define FSF_STATUS_READ_CFDC_HARDENED           0x0000000B
149 #define FSF_STATUS_READ_FEATURE_UPDATE_ALERT    0x0000000C
150
151 /* status subtypes in status read buffer */
152 #define FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT     0x00000001
153 #define FSF_STATUS_READ_SUB_ERROR_PORT          0x00000002
154
155 /* status subtypes for link down */
156 #define FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK    0x00000000
157 #define FSF_STATUS_READ_SUB_FDISC_FAILED        0x00000001
158 #define FSF_STATUS_READ_SUB_FIRMWARE_UPDATE     0x00000002
159
160 /* status subtypes for unsolicited status notification lost */
161 #define FSF_STATUS_READ_SUB_INCOMING_ELS        0x00000001
162 #define FSF_STATUS_READ_SUB_SENSE_DATA          0x00000002
163 #define FSF_STATUS_READ_SUB_LINK_STATUS         0x00000004
164 #define FSF_STATUS_READ_SUB_PORT_CLOSED         0x00000008
165 #define FSF_STATUS_READ_SUB_BIT_ERROR_THRESHOLD 0x00000010
166 #define FSF_STATUS_READ_SUB_ACT_UPDATED         0x00000020
167 #define FSF_STATUS_READ_SUB_ACT_HARDENED        0x00000040
168 #define FSF_STATUS_READ_SUB_FEATURE_UPDATE_ALERT 0x00000080
169
170 /* status subtypes for CFDC */
171 #define FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE 0x00000002
172 #define FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE2 0x0000000F
173
174 /* topologie that is detected by the adapter */
175 #define FSF_TOPO_ERROR                          0x00000000
176 #define FSF_TOPO_P2P                            0x00000001
177 #define FSF_TOPO_FABRIC                         0x00000002
178 #define FSF_TOPO_AL                             0x00000003
179
180 /* data direction for FCP commands */
181 #define FSF_DATADIR_WRITE                       0x00000001
182 #define FSF_DATADIR_READ                        0x00000002
183 #define FSF_DATADIR_READ_WRITE                  0x00000003
184 #define FSF_DATADIR_CMND                        0x00000004
185
186 /* fc service class */
187 #define FSF_CLASS_1                             0x00000001
188 #define FSF_CLASS_2                             0x00000002
189 #define FSF_CLASS_3                             0x00000003
190
191 /* SBAL chaining */
192 #define FSF_MAX_SBALS_PER_REQ                   36
193 #define FSF_MAX_SBALS_PER_ELS_REQ               2
194
195 /* logging space behind QTCB */
196 #define FSF_QTCB_LOG_SIZE                       1024
197
198 /* channel features */
199 #define FSF_FEATURE_CFDC                        0x00000002
200 #define FSF_FEATURE_LUN_SHARING                 0x00000004
201 #define FSF_FEATURE_NOTIFICATION_LOST           0x00000008
202 #define FSF_FEATURE_HBAAPI_MANAGEMENT           0x00000010
203 #define FSF_FEATURE_ELS_CT_CHAINED_SBALS        0x00000020
204 #define FSF_FEATURE_UPDATE_ALERT                0x00000100
205 #define FSF_FEATURE_MEASUREMENT_DATA            0x00000200
206
207 /* host connection features */
208 #define FSF_FEATURE_NPIV_MODE                   0x00000001
209 #define FSF_FEATURE_VM_ASSIGNED_WWPN            0x00000002
210
211 /* option */
212 #define FSF_OPEN_LUN_SUPPRESS_BOXING            0x00000001
213 #define FSF_OPEN_LUN_REPLICATE_SENSE            0x00000002
214
215 /* adapter types */
216 #define FSF_ADAPTER_TYPE_FICON                  0x00000001
217 #define FSF_ADAPTER_TYPE_FICON_EXPRESS          0x00000002
218
219 /* port types */
220 #define FSF_HBA_PORTTYPE_UNKNOWN                0x00000001
221 #define FSF_HBA_PORTTYPE_NOTPRESENT             0x00000003
222 #define FSF_HBA_PORTTYPE_NPORT                  0x00000005
223 #define FSF_HBA_PORTTYPE_PTP                    0x00000021
224 /* following are not defined and used by FSF Spec
225    but are additionally defined by FC-HBA */
226 #define FSF_HBA_PORTTYPE_OTHER                  0x00000002
227 #define FSF_HBA_PORTTYPE_NOTPRESENT             0x00000003
228 #define FSF_HBA_PORTTYPE_NLPORT                 0x00000006
229 #define FSF_HBA_PORTTYPE_FLPORT                 0x00000007
230 #define FSF_HBA_PORTTYPE_FPORT                  0x00000008
231 #define FSF_HBA_PORTTYPE_LPORT                  0x00000020
232
233 /* port states */
234 #define FSF_HBA_PORTSTATE_UNKNOWN               0x00000001
235 #define FSF_HBA_PORTSTATE_ONLINE                0x00000002
236 #define FSF_HBA_PORTSTATE_OFFLINE               0x00000003
237 #define FSF_HBA_PORTSTATE_LINKDOWN              0x00000006
238 #define FSF_HBA_PORTSTATE_ERROR                 0x00000007
239
240 /* IO states of adapter */
241 #define FSF_IOSTAT_NPORT_RJT                    0x00000004
242 #define FSF_IOSTAT_FABRIC_RJT                   0x00000005
243 #define FSF_IOSTAT_LS_RJT                       0x00000009
244
245 /* open LUN access flags*/
246 #define FSF_UNIT_ACCESS_OPEN_LUN_ALLOWED        0x01000000
247 #define FSF_UNIT_ACCESS_EXCLUSIVE               0x02000000
248 #define FSF_UNIT_ACCESS_OUTBOUND_TRANSFER       0x10000000
249
250 /* FSF interface for CFDC */
251 #define ZFCP_CFDC_MAX_SIZE              127 * 1024
252 #define ZFCP_CFDC_PAGES                 PFN_UP(ZFCP_CFDC_MAX_SIZE)
253
254 struct zfcp_fsf_cfdc {
255         struct scatterlist sg[ZFCP_CFDC_PAGES];
256         u32 command;
257         u32 option;
258 };
259
260 struct fsf_queue_designator {
261         u8  cssid;
262         u8  chpid;
263         u8  hla;
264         u8  ua;
265         u32 res1;
266 } __attribute__ ((packed));
267
268 struct fsf_port_closed_payload {
269         struct fsf_queue_designator queue_designator;
270         u32                         port_handle;
271 } __attribute__ ((packed));
272
273 struct fsf_bit_error_payload {
274         u32 res1;
275         u32 link_failure_error_count;
276         u32 loss_of_sync_error_count;
277         u32 loss_of_signal_error_count;
278         u32 primitive_sequence_error_count;
279         u32 invalid_transmission_word_error_count;
280         u32 crc_error_count;
281         u32 primitive_sequence_event_timeout_count;
282         u32 elastic_buffer_overrun_error_count;
283         u32 fcal_arbitration_timeout_count;
284         u32 advertised_receive_b2b_credit;
285         u32 current_receive_b2b_credit;
286         u32 advertised_transmit_b2b_credit;
287         u32 current_transmit_b2b_credit;
288 } __attribute__ ((packed));
289
290 struct fsf_link_down_info {
291         u32 error_code;
292         u32 res1;
293         u8 res2[2];
294         u8 primary_status;
295         u8 ioerr_code;
296         u8 action_code;
297         u8 reason_code;
298         u8 explanation_code;
299         u8 vendor_specific_code;
300 } __attribute__ ((packed));
301
302 struct fsf_status_read_buffer {
303         u32 status_type;
304         u32 status_subtype;
305         u32 length;
306         u32 res1;
307         struct fsf_queue_designator queue_designator;
308         u32 d_id;
309         u32 class;
310         u64 fcp_lun;
311         u8  res3[24];
312         union {
313                 u8  data[FSF_STATUS_READ_PAYLOAD_SIZE];
314                 u32 word[FSF_STATUS_READ_PAYLOAD_SIZE/sizeof(u32)];
315                 struct fsf_link_down_info link_down_info;
316                 struct fsf_bit_error_payload bit_error;
317         } payload;
318 } __attribute__ ((packed));
319
320 struct fsf_qual_version_error {
321         u32 fsf_version;
322         u32 res1[3];
323 } __attribute__ ((packed));
324
325 struct fsf_qual_sequence_error {
326         u32 exp_req_seq_no;
327         u32 res1[3];
328 } __attribute__ ((packed));
329
330 struct fsf_qual_latency_info {
331         u32 channel_lat;
332         u32 fabric_lat;
333         u8 res1[8];
334 } __attribute__ ((packed));
335
336 union fsf_prot_status_qual {
337         u32 word[FSF_PROT_STATUS_QUAL_SIZE / sizeof(u32)];
338         u64 doubleword[FSF_PROT_STATUS_QUAL_SIZE / sizeof(u64)];
339         struct fsf_qual_version_error   version_error;
340         struct fsf_qual_sequence_error  sequence_error;
341         struct fsf_link_down_info link_down_info;
342         struct fsf_qual_latency_info latency_info;
343 } __attribute__ ((packed));
344
345 struct fsf_qtcb_prefix {
346         u64 req_id;
347         u32 qtcb_version;
348         u32 ulp_info;
349         u32 qtcb_type;
350         u32 req_seq_no;
351         u32 prot_status;
352         union fsf_prot_status_qual prot_status_qual;
353         u8  res1[20];
354 } __attribute__ ((packed));
355
356 struct fsf_statistics_info {
357         u64 input_req;
358         u64 output_req;
359         u64 control_req;
360         u64 input_mb;
361         u64 output_mb;
362         u64 seconds_act;
363 } __attribute__ ((packed));
364
365 union fsf_status_qual {
366         u8  byte[FSF_STATUS_QUALIFIER_SIZE];
367         u16 halfword[FSF_STATUS_QUALIFIER_SIZE / sizeof (u16)];
368         u32 word[FSF_STATUS_QUALIFIER_SIZE / sizeof (u32)];
369         u64 doubleword[FSF_STATUS_QUALIFIER_SIZE / sizeof(u64)];
370         struct fsf_queue_designator fsf_queue_designator;
371         struct fsf_link_down_info link_down_info;
372 } __attribute__ ((packed));
373
374 struct fsf_qtcb_header {
375         u64 req_handle;
376         u32 fsf_command;
377         u32 res1;
378         u32 port_handle;
379         u32 lun_handle;
380         u32 res2;
381         u32 fsf_status;
382         union fsf_status_qual fsf_status_qual;
383         u8  res3[28];
384         u16 log_start;
385         u16 log_length;
386         u8  res4[16];
387 } __attribute__ ((packed));
388
389 struct fsf_nport_serv_param {
390         u8  common_serv_param[16];
391         u64 wwpn;
392         u64 wwnn;
393         u8  class1_serv_param[16];
394         u8  class2_serv_param[16];
395         u8  class3_serv_param[16];
396         u8  class4_serv_param[16];
397         u8  vendor_version_level[16];
398 } __attribute__ ((packed));
399
400 struct fsf_plogi {
401         u32    code;
402         struct fsf_nport_serv_param serv_param;
403 } __attribute__ ((packed));
404
405 #define FSF_FCP_CMND_SIZE       288
406 #define FSF_FCP_RSP_SIZE        128
407
408 struct fsf_qtcb_bottom_io {
409         u32 data_direction;
410         u32 service_class;
411         u8  res1[8];
412         u32 fcp_cmnd_length;
413         u8  res2[12];
414         u8  fcp_cmnd[FSF_FCP_CMND_SIZE];
415         u8  fcp_rsp[FSF_FCP_RSP_SIZE];
416         u8  res3[64];
417 } __attribute__ ((packed));
418
419 struct fsf_qtcb_bottom_support {
420         u32 operation_subtype;
421         u8  res1[12];
422         u32 d_id;
423         u32 option;
424         u64 fcp_lun;
425         u64 res2;
426         u64 req_handle;
427         u32 service_class;
428         u8  res3[3];
429         u8  timeout;
430         u32 lun_access_info;
431         u8  res4[180];
432         u32 els1_length;
433         u32 els2_length;
434         u32 req_buf_length;
435         u32 resp_buf_length;
436         u8  els[256];
437 } __attribute__ ((packed));
438
439 struct fsf_qtcb_bottom_config {
440         u32 lic_version;
441         u32 feature_selection;
442         u32 high_qtcb_version;
443         u32 low_qtcb_version;
444         u32 max_qtcb_size;
445         u32 max_data_transfer_size;
446         u32 adapter_features;
447         u32 connection_features;
448         u32 fc_topology;
449         u32 fc_link_speed;
450         u32 adapter_type;
451         u32 peer_d_id;
452         u8 res1[2];
453         u16 timer_interval;
454         u8 res2[8];
455         u32 s_id;
456         struct fsf_nport_serv_param nport_serv_param;
457         u8 reserved_nport_serv_param[16];
458         u8 res3[8];
459         u32 adapter_ports;
460         u32 hardware_version;
461         u8 serial_number[32];
462         struct fsf_nport_serv_param plogi_payload;
463         struct fsf_statistics_info stat_info;
464         u8 res4[112];
465 } __attribute__ ((packed));
466
467 struct fsf_qtcb_bottom_port {
468         u64 wwpn;
469         u32 fc_port_id;
470         u32 port_type;
471         u32 port_state;
472         u32 class_of_service;   /* should be 0x00000006 for class 2 and 3 */
473         u8 supported_fc4_types[32]; /* should be 0x00000100 for scsi fcp */
474         u8 active_fc4_types[32];
475         u32 supported_speed;    /* 0x0001 for 1 GBit/s or 0x0002 for 2 GBit/s */
476         u32 maximum_frame_size; /* fixed value of 2112 */
477         u64 seconds_since_last_reset;
478         u64 tx_frames;
479         u64 tx_words;
480         u64 rx_frames;
481         u64 rx_words;
482         u64 lip;                /* 0 */
483         u64 nos;                /* currently 0 */
484         u64 error_frames;       /* currently 0 */
485         u64 dumped_frames;      /* currently 0 */
486         u64 link_failure;
487         u64 loss_of_sync;
488         u64 loss_of_signal;
489         u64 psp_error_counts;
490         u64 invalid_tx_words;
491         u64 invalid_crcs;
492         u64 input_requests;
493         u64 output_requests;
494         u64 control_requests;
495         u64 input_mb;           /* where 1 MByte == 1.000.000 Bytes */
496         u64 output_mb;          /* where 1 MByte == 1.000.000 Bytes */
497         u8 cp_util;
498         u8 cb_util;
499         u8 a_util;
500         u8 res2[253];
501 } __attribute__ ((packed));
502
503 union fsf_qtcb_bottom {
504         struct fsf_qtcb_bottom_io      io;
505         struct fsf_qtcb_bottom_support support;
506         struct fsf_qtcb_bottom_config  config;
507         struct fsf_qtcb_bottom_port port;
508 };
509
510 struct fsf_qtcb {
511         struct fsf_qtcb_prefix prefix;
512         struct fsf_qtcb_header header;
513         union  fsf_qtcb_bottom bottom;
514         u8 log[FSF_QTCB_LOG_SIZE];
515 } __attribute__ ((packed));
516
517 #endif                          /* FSF_H */