1 /* SPDX-License-Identifier: MIT */ 1 /* SPDX-License-Identifier: MIT */
2 /********************************************* 2 /******************************************************************************
3 * vscsiif.h 3 * vscsiif.h
4 * 4 *
5 * Based on the blkif.h code. 5 * Based on the blkif.h code.
6 * 6 *
7 * Copyright(c) FUJITSU Limited 2008. 7 * Copyright(c) FUJITSU Limited 2008.
8 */ 8 */
9 9
10 #ifndef __XEN__PUBLIC_IO_SCSI_H__ 10 #ifndef __XEN__PUBLIC_IO_SCSI_H__
11 #define __XEN__PUBLIC_IO_SCSI_H__ 11 #define __XEN__PUBLIC_IO_SCSI_H__
12 12
13 #include "ring.h" 13 #include "ring.h"
14 #include "../grant_table.h" 14 #include "../grant_table.h"
15 15
16 /* 16 /*
17 * Feature and Parameter Negotiation 17 * Feature and Parameter Negotiation
18 * ================================= 18 * =================================
19 * The two halves of a Xen pvSCSI driver utili 19 * The two halves of a Xen pvSCSI driver utilize nodes within the XenStore to
20 * communicate capabilities and to negotiate o 20 * communicate capabilities and to negotiate operating parameters. This
21 * section enumerates these nodes which reside 21 * section enumerates these nodes which reside in the respective front and
22 * backend portions of the XenStore, following 22 * backend portions of the XenStore, following the XenBus convention.
23 * 23 *
24 * Any specified default value is in effect if 24 * Any specified default value is in effect if the corresponding XenBus node
25 * is not present in the XenStore. 25 * is not present in the XenStore.
26 * 26 *
27 * XenStore nodes in sections marked "PRIVATE" 27 * XenStore nodes in sections marked "PRIVATE" are solely for use by the
28 * driver side whose XenBus tree contains them 28 * driver side whose XenBus tree contains them.
29 * 29 *
30 ********************************************* 30 *****************************************************************************
31 * Backend XenBus N 31 * Backend XenBus Nodes
32 ********************************************* 32 *****************************************************************************
33 * 33 *
34 *------------------ Backend Device Identifica 34 *------------------ Backend Device Identification (PRIVATE) ------------------
35 * 35 *
36 * p-devname 36 * p-devname
37 * Values: string 37 * Values: string
38 * 38 *
39 * A free string used to identify the phy 39 * A free string used to identify the physical device (e.g. a disk name).
40 * 40 *
41 * p-dev 41 * p-dev
42 * Values: string 42 * Values: string
43 * 43 *
44 * A string specifying the backend device 44 * A string specifying the backend device: either a 4-tuple "h:c:t:l"
45 * (host, controller, target, lun, all in 45 * (host, controller, target, lun, all integers), or a WWN (e.g.
46 * "naa.60014054ac780582:0"). 46 * "naa.60014054ac780582:0").
47 * 47 *
48 * v-dev 48 * v-dev
49 * Values: string 49 * Values: string
50 * 50 *
51 * A string specifying the frontend devic 51 * A string specifying the frontend device in form of a 4-tuple "h:c:t:l"
52 * (host, controller, target, lun, all in 52 * (host, controller, target, lun, all integers).
53 * 53 *
54 *--------------------------------- Features - 54 *--------------------------------- Features ---------------------------------
55 * 55 *
56 * feature-sg-grant 56 * feature-sg-grant
57 * Values: unsigned [VSCSIIF_SG_T 57 * Values: unsigned [VSCSIIF_SG_TABLESIZE...65535]
58 * Default Value: 0 58 * Default Value: 0
59 * 59 *
60 * Specifies the maximum number of scatte 60 * Specifies the maximum number of scatter/gather elements in grant pages
61 * supported. If not set, the backend sup 61 * supported. If not set, the backend supports up to VSCSIIF_SG_TABLESIZE
62 * SG elements specified directly in the 62 * SG elements specified directly in the request.
63 * 63 *
64 ********************************************* 64 *****************************************************************************
65 * Frontend XenBus 65 * Frontend XenBus Nodes
66 ********************************************* 66 *****************************************************************************
67 * 67 *
68 *----------------------- Request Transport Pa 68 *----------------------- Request Transport Parameters -----------------------
69 * 69 *
70 * event-channel 70 * event-channel
71 * Values: unsigned 71 * Values: unsigned
72 * 72 *
73 * The identifier of the Xen event channe 73 * The identifier of the Xen event channel used to signal activity
74 * in the ring buffer. 74 * in the ring buffer.
75 * 75 *
76 * ring-ref 76 * ring-ref
77 * Values: unsigned 77 * Values: unsigned
78 * 78 *
79 * The Xen grant reference granting permi 79 * The Xen grant reference granting permission for the backend to map
80 * the sole page in a single page sized r 80 * the sole page in a single page sized ring buffer.
81 * 81 *
82 * protocol 82 * protocol
83 * Values: string (XEN_IO_PROTO_A 83 * Values: string (XEN_IO_PROTO_ABI_*)
84 * Default Value: XEN_IO_PROTO_ABI_NATIV 84 * Default Value: XEN_IO_PROTO_ABI_NATIVE
85 * 85 *
86 * The machine ABI rules governing the fo 86 * The machine ABI rules governing the format of all ring request and
87 * response structures. 87 * response structures.
88 */ 88 */
89 89
90 /* 90 /*
91 * Xenstore format in practice 91 * Xenstore format in practice
92 * =========================== 92 * ===========================
93 * 93 *
94 * The backend driver uses a single_host:many_ 94 * The backend driver uses a single_host:many_devices notation to manage domU
95 * devices. Everything is stored in /local/dom 95 * devices. Everything is stored in /local/domain/<backend_domid>/backend/vscsi/.
96 * The xenstore layout looks like this (dom0 i 96 * The xenstore layout looks like this (dom0 is assumed to be the backend_domid):
97 * 97 *
98 * <domid>/<vhost>/feature-host = "" 98 * <domid>/<vhost>/feature-host = ""
99 * <domid>/<vhost>/frontend = "/local/doma 99 * <domid>/<vhost>/frontend = "/local/domain/<domid>/device/vscsi/0"
100 * <domid>/<vhost>/frontend-id = "<domid>" 100 * <domid>/<vhost>/frontend-id = "<domid>"
101 * <domid>/<vhost>/online = "1" 101 * <domid>/<vhost>/online = "1"
102 * <domid>/<vhost>/state = "4" 102 * <domid>/<vhost>/state = "4"
103 * <domid>/<vhost>/vscsi-devs/dev-0/p-dev 103 * <domid>/<vhost>/vscsi-devs/dev-0/p-dev = "8:0:2:1" or "naa.wwn:lun"
104 * <domid>/<vhost>/vscsi-devs/dev-0/state 104 * <domid>/<vhost>/vscsi-devs/dev-0/state = "4"
105 * <domid>/<vhost>/vscsi-devs/dev-0/v-dev 105 * <domid>/<vhost>/vscsi-devs/dev-0/v-dev = "0:0:0:0"
106 * <domid>/<vhost>/vscsi-devs/dev-1/p-dev 106 * <domid>/<vhost>/vscsi-devs/dev-1/p-dev = "8:0:2:2"
107 * <domid>/<vhost>/vscsi-devs/dev-1/state 107 * <domid>/<vhost>/vscsi-devs/dev-1/state = "4"
108 * <domid>/<vhost>/vscsi-devs/dev-1/v-dev 108 * <domid>/<vhost>/vscsi-devs/dev-1/v-dev = "0:0:1:0"
109 * 109 *
110 * The frontend driver maintains its state in 110 * The frontend driver maintains its state in
111 * /local/domain/<domid>/device/vscsi/. 111 * /local/domain/<domid>/device/vscsi/.
112 * 112 *
113 * <vhost>/backend = "/local/domain/0/back 113 * <vhost>/backend = "/local/domain/0/backend/vscsi/<domid>/<vhost>"
114 * <vhost>/backend-id = "" 114 * <vhost>/backend-id = ""
115 * <vhost>/event-channel = "20" 115 * <vhost>/event-channel = "20"
116 * <vhost>/ring-ref = "43" 116 * <vhost>/ring-ref = "43"
117 * <vhost>/state = "4" 117 * <vhost>/state = "4"
118 * <vhost>/vscsi-devs/dev-0/state = "4" 118 * <vhost>/vscsi-devs/dev-0/state = "4"
119 * <vhost>/vscsi-devs/dev-1/state = "4" 119 * <vhost>/vscsi-devs/dev-1/state = "4"
120 * 120 *
121 * In addition to the entries for backend and 121 * In addition to the entries for backend and frontend these flags are stored
122 * for the toolstack: 122 * for the toolstack:
123 * 123 *
124 * <domid>/<vhost>/vscsi-devs/dev-1/p-devn 124 * <domid>/<vhost>/vscsi-devs/dev-1/p-devname = "/dev/$device"
125 * <domid>/<vhost>/libxl_ctrl_index = "" 125 * <domid>/<vhost>/libxl_ctrl_index = ""
126 * 126 *
127 * 127 *
128 * Backend/frontend protocol 128 * Backend/frontend protocol
129 * ========================= 129 * =========================
130 * 130 *
131 * To create a vhost along with a device: 131 * To create a vhost along with a device:
132 * <domid>/<vhost>/feature-host = "" 132 * <domid>/<vhost>/feature-host = ""
133 * <domid>/<vhost>/frontend = "/local/doma 133 * <domid>/<vhost>/frontend = "/local/domain/<domid>/device/vscsi/0"
134 * <domid>/<vhost>/frontend-id = "<domid>" 134 * <domid>/<vhost>/frontend-id = "<domid>"
135 * <domid>/<vhost>/online = "1" 135 * <domid>/<vhost>/online = "1"
136 * <domid>/<vhost>/state = "1" 136 * <domid>/<vhost>/state = "1"
137 * <domid>/<vhost>/vscsi-devs/dev-0/p-dev 137 * <domid>/<vhost>/vscsi-devs/dev-0/p-dev = "8:0:2:1"
138 * <domid>/<vhost>/vscsi-devs/dev-0/state 138 * <domid>/<vhost>/vscsi-devs/dev-0/state = "1"
139 * <domid>/<vhost>/vscsi-devs/dev-0/v-dev 139 * <domid>/<vhost>/vscsi-devs/dev-0/v-dev = "0:0:0:0"
140 * Wait for <domid>/<vhost>/state + <domid>/<v 140 * Wait for <domid>/<vhost>/state + <domid>/<vhost>/vscsi-devs/dev-0/state become 4
141 * 141 *
142 * To add another device to a vhost: 142 * To add another device to a vhost:
143 * <domid>/<vhost>/state = "7" 143 * <domid>/<vhost>/state = "7"
144 * <domid>/<vhost>/vscsi-devs/dev-1/p-dev 144 * <domid>/<vhost>/vscsi-devs/dev-1/p-dev = "8:0:2:2"
145 * <domid>/<vhost>/vscsi-devs/dev-1/state 145 * <domid>/<vhost>/vscsi-devs/dev-1/state = "1"
146 * <domid>/<vhost>/vscsi-devs/dev-1/v-dev 146 * <domid>/<vhost>/vscsi-devs/dev-1/v-dev = "0:0:1:0"
147 * Wait for <domid>/<vhost>/state + <domid>/<v 147 * Wait for <domid>/<vhost>/state + <domid>/<vhost>/vscsi-devs/dev-1/state become 4
148 * 148 *
149 * To remove a device from a vhost: 149 * To remove a device from a vhost:
150 * <domid>/<vhost>/state = "7" 150 * <domid>/<vhost>/state = "7"
151 * <domid>/<vhost>/vscsi-devs/dev-1/state 151 * <domid>/<vhost>/vscsi-devs/dev-1/state = "5"
152 * Wait for <domid>/<vhost>/state to become 4 152 * Wait for <domid>/<vhost>/state to become 4
153 * Wait for <domid>/<vhost>/vscsi-devs/dev-1/s 153 * Wait for <domid>/<vhost>/vscsi-devs/dev-1/state become 6
154 * Remove <domid>/<vhost>/vscsi-devs/dev-1/{st 154 * Remove <domid>/<vhost>/vscsi-devs/dev-1/{state,p-dev,v-dev,p-devname}
155 * Remove <domid>/<vhost>/vscsi-devs/dev-1/ 155 * Remove <domid>/<vhost>/vscsi-devs/dev-1/
156 * 156 *
157 */ 157 */
158 158
159 /* Requests from the frontend to the backend * 159 /* Requests from the frontend to the backend */
160 160
161 /* 161 /*
162 * Request a SCSI operation specified via a CD 162 * Request a SCSI operation specified via a CDB in vscsiif_request.cmnd.
163 * The target is specified via channel, id and 163 * The target is specified via channel, id and lun.
164 * 164 *
165 * The operation to be performed is specified 165 * The operation to be performed is specified via a CDB in cmnd[], the length
166 * of the CDB is in cmd_len. sc_data_direction 166 * of the CDB is in cmd_len. sc_data_direction specifies the direction of data
167 * (to the device, from the device, or none at 167 * (to the device, from the device, or none at all).
168 * 168 *
169 * If data is to be transferred to or from the 169 * If data is to be transferred to or from the device the buffer(s) in the
170 * guest memory is/are specified via one or mu 170 * guest memory is/are specified via one or multiple scsiif_request_segment
171 * descriptors each specifying a memory page v 171 * descriptors each specifying a memory page via a grant_ref_t, a offset into
172 * the page and the length of the area in that 172 * the page and the length of the area in that page. All scsiif_request_segment
173 * areas concatenated form the resulting data 173 * areas concatenated form the resulting data buffer used by the operation.
174 * If the number of scsiif_request_segment are 174 * If the number of scsiif_request_segment areas is not too large (less than
175 * or equal VSCSIIF_SG_TABLESIZE) the areas ca 175 * or equal VSCSIIF_SG_TABLESIZE) the areas can be specified directly in the
176 * seg[] array and the number of valid scsiif_ 176 * seg[] array and the number of valid scsiif_request_segment elements is to be
177 * set in nr_segments. 177 * set in nr_segments.
178 * 178 *
179 * If "feature-sg-grant" in the Xenstore is se 179 * If "feature-sg-grant" in the Xenstore is set it is possible to specify more
180 * than VSCSIIF_SG_TABLESIZE scsiif_request_se 180 * than VSCSIIF_SG_TABLESIZE scsiif_request_segment elements via indirection.
181 * The maximum number of allowed scsiif_reques 181 * The maximum number of allowed scsiif_request_segment elements is the value
182 * of the "feature-sg-grant" entry from Xensto 182 * of the "feature-sg-grant" entry from Xenstore. When using indirection the
183 * seg[] array doesn't contain specifications 183 * seg[] array doesn't contain specifications of the data buffers, but
184 * references to scsiif_request_segment arrays 184 * references to scsiif_request_segment arrays, which in turn reference the
185 * data buffers. While nr_segments holds the n 185 * data buffers. While nr_segments holds the number of populated seg[] entries
186 * (plus the set VSCSIIF_SG_GRANT bit), the nu 186 * (plus the set VSCSIIF_SG_GRANT bit), the number of scsiif_request_segment
187 * elements referencing the target data buffer 187 * elements referencing the target data buffers is calculated from the lengths
188 * of the seg[] elements (the sum of all valid 188 * of the seg[] elements (the sum of all valid seg[].length divided by the
189 * size of one scsiif_request_segment structur 189 * size of one scsiif_request_segment structure). The frontend may use a mix of
190 * direct and indirect requests. 190 * direct and indirect requests.
191 */ 191 */
192 #define VSCSIIF_ACT_SCSI_CDB 1 192 #define VSCSIIF_ACT_SCSI_CDB 1
193 193
194 /* 194 /*
195 * Request abort of a running operation for th 195 * Request abort of a running operation for the specified target given by
196 * channel, id, lun and the operation's rqid i 196 * channel, id, lun and the operation's rqid in ref_rqid.
197 */ 197 */
198 #define VSCSIIF_ACT_SCSI_ABORT 2 198 #define VSCSIIF_ACT_SCSI_ABORT 2
199 199
200 /* 200 /*
201 * Request a device reset of the specified tar 201 * Request a device reset of the specified target (channel and id).
202 */ 202 */
203 #define VSCSIIF_ACT_SCSI_RESET 3 203 #define VSCSIIF_ACT_SCSI_RESET 3
204 204
205 /* 205 /*
206 * Preset scatter/gather elements for a follow 206 * Preset scatter/gather elements for a following request. Deprecated.
207 * Keeping the define only to avoid usage of t 207 * Keeping the define only to avoid usage of the value "4" for other actions.
208 */ 208 */
209 #define VSCSIIF_ACT_SCSI_SG_PRESET 4 209 #define VSCSIIF_ACT_SCSI_SG_PRESET 4
210 210
211 /* 211 /*
212 * Maximum scatter/gather segments per request 212 * Maximum scatter/gather segments per request.
213 * 213 *
214 * Considering balance between allocating at l 214 * Considering balance between allocating at least 16 "vscsiif_request"
215 * structures on one page (4096 bytes) and the 215 * structures on one page (4096 bytes) and the number of scatter/gather
216 * elements needed, we decided to use 26 as a 216 * elements needed, we decided to use 26 as a magic number.
217 * 217 *
218 * If "feature-sg-grant" is set, more scatter/ 218 * If "feature-sg-grant" is set, more scatter/gather elements can be specified
219 * by placing them in one or more (up to VSCSI 219 * by placing them in one or more (up to VSCSIIF_SG_TABLESIZE) granted pages.
220 * In this case the vscsiif_request seg elemen 220 * In this case the vscsiif_request seg elements don't contain references to
221 * the user data, but to the SG elements refer 221 * the user data, but to the SG elements referencing the user data.
222 */ 222 */
223 #define VSCSIIF_SG_TABLESIZE 26 223 #define VSCSIIF_SG_TABLESIZE 26
224 224
225 /* 225 /*
226 * based on Linux kernel 2.6.18, still valid 226 * based on Linux kernel 2.6.18, still valid
227 * 227 *
228 * Changing these values requires support of m 228 * Changing these values requires support of multiple protocols via the rings
229 * as "old clients" will blindly use these val 229 * as "old clients" will blindly use these values and the resulting structure
230 * sizes. 230 * sizes.
231 */ 231 */
232 #define VSCSIIF_MAX_COMMAND_SIZE 16 232 #define VSCSIIF_MAX_COMMAND_SIZE 16
233 #define VSCSIIF_SENSE_BUFFERSIZE 96 233 #define VSCSIIF_SENSE_BUFFERSIZE 96
234 #define VSCSIIF_PAGE_SIZE 4096 234 #define VSCSIIF_PAGE_SIZE 4096
235 235
236 struct scsiif_request_segment { 236 struct scsiif_request_segment {
237 grant_ref_t gref; 237 grant_ref_t gref;
238 uint16_t offset; 238 uint16_t offset;
239 uint16_t length; 239 uint16_t length;
240 }; 240 };
241 241
242 #define VSCSIIF_SG_PER_PAGE (VSCSIIF_PAGE_ 242 #define VSCSIIF_SG_PER_PAGE (VSCSIIF_PAGE_SIZE / \
243 sizeof(struct 243 sizeof(struct scsiif_request_segment))
244 244
245 /* Size of one request is 252 bytes */ 245 /* Size of one request is 252 bytes */
246 struct vscsiif_request { 246 struct vscsiif_request {
247 uint16_t rqid; /* private gue 247 uint16_t rqid; /* private guest value, echoed in resp */
248 uint8_t act; /* command bet 248 uint8_t act; /* command between backend and frontend */
249 uint8_t cmd_len; /* valid CDB b 249 uint8_t cmd_len; /* valid CDB bytes */
250 250
251 uint8_t cmnd[VSCSIIF_MAX_COMMAND_SIZE] 251 uint8_t cmnd[VSCSIIF_MAX_COMMAND_SIZE]; /* the CDB */
252 uint16_t timeout_per_command; /* dep 252 uint16_t timeout_per_command; /* deprecated */
253 uint16_t channel, id, lun; /* (vi 253 uint16_t channel, id, lun; /* (virtual) device specification */
254 uint16_t ref_rqid; /* com 254 uint16_t ref_rqid; /* command abort reference */
255 uint8_t sc_data_direction; /* for 255 uint8_t sc_data_direction; /* for DMA_TO_DEVICE(1)
256 DMA 256 DMA_FROM_DEVICE(2)
257 DMA 257 DMA_NONE(3) requests */
258 uint8_t nr_segments; /* Num 258 uint8_t nr_segments; /* Number of pieces of scatter-gather */
259 /* 259 /*
260 * flag in nr_segments: SG elements via grant 260 * flag in nr_segments: SG elements via grant page
261 * 261 *
262 * If VSCSIIF_SG_GRANT is set, the low 7 bits 262 * If VSCSIIF_SG_GRANT is set, the low 7 bits of nr_segments specify the number
263 * of grant pages containing SG elements. Usab 263 * of grant pages containing SG elements. Usable if "feature-sg-grant" set.
264 */ 264 */
265 #define VSCSIIF_SG_GRANT 0x80 265 #define VSCSIIF_SG_GRANT 0x80
266 266
267 struct scsiif_request_segment seg[VSCS 267 struct scsiif_request_segment seg[VSCSIIF_SG_TABLESIZE];
268 uint32_t reserved[3]; 268 uint32_t reserved[3];
269 }; 269 };
270 270
271 /* Size of one response is 252 bytes */ 271 /* Size of one response is 252 bytes */
272 struct vscsiif_response { 272 struct vscsiif_response {
273 uint16_t rqid; /* identifies 273 uint16_t rqid; /* identifies request */
274 uint8_t padding; 274 uint8_t padding;
275 uint8_t sense_len; 275 uint8_t sense_len;
276 uint8_t sense_buffer[VSCSIIF_SENSE_BUF 276 uint8_t sense_buffer[VSCSIIF_SENSE_BUFFERSIZE];
277 int32_t rslt; 277 int32_t rslt;
278 uint32_t residual_len; /* request buf 278 uint32_t residual_len; /* request bufflen -
279 return the 279 return the value from physical device */
280 uint32_t reserved[36]; 280 uint32_t reserved[36];
281 }; 281 };
282 282
283 /* SCSI I/O status from vscsiif_response->rslt 283 /* SCSI I/O status from vscsiif_response->rslt */
284 #define XEN_VSCSIIF_RSLT_STATUS(x) ((x) & 0x0 284 #define XEN_VSCSIIF_RSLT_STATUS(x) ((x) & 0x00ff)
285 285
286 /* Host I/O status from vscsiif_response->rslt 286 /* Host I/O status from vscsiif_response->rslt */
287 #define XEN_VSCSIIF_RSLT_HOST(x) (((x) & 0x 287 #define XEN_VSCSIIF_RSLT_HOST(x) (((x) & 0x00ff0000) >> 16)
288 #define XEN_VSCSIIF_RSLT_HOST_OK 288 #define XEN_VSCSIIF_RSLT_HOST_OK 0
289 /* Couldn't connect before timeout */ 289 /* Couldn't connect before timeout */
290 #define XEN_VSCSIIF_RSLT_HOST_NO_CONNECT 290 #define XEN_VSCSIIF_RSLT_HOST_NO_CONNECT 1
291 /* Bus busy through timeout */ 291 /* Bus busy through timeout */
292 #define XEN_VSCSIIF_RSLT_HOST_BUS_BUSY 292 #define XEN_VSCSIIF_RSLT_HOST_BUS_BUSY 2
293 /* Timed out for other reason */ 293 /* Timed out for other reason */
294 #define XEN_VSCSIIF_RSLT_HOST_TIME_OUT 294 #define XEN_VSCSIIF_RSLT_HOST_TIME_OUT 3
295 /* Bad target */ 295 /* Bad target */
296 #define XEN_VSCSIIF_RSLT_HOST_BAD_TARGET 296 #define XEN_VSCSIIF_RSLT_HOST_BAD_TARGET 4
297 /* Abort for some other reason */ 297 /* Abort for some other reason */
298 #define XEN_VSCSIIF_RSLT_HOST_ABORT 298 #define XEN_VSCSIIF_RSLT_HOST_ABORT 5
299 /* Parity error */ 299 /* Parity error */
300 #define XEN_VSCSIIF_RSLT_HOST_PARITY 300 #define XEN_VSCSIIF_RSLT_HOST_PARITY 6
301 /* Internal error */ 301 /* Internal error */
302 #define XEN_VSCSIIF_RSLT_HOST_ERROR 302 #define XEN_VSCSIIF_RSLT_HOST_ERROR 7
303 /* Reset by somebody */ 303 /* Reset by somebody */
304 #define XEN_VSCSIIF_RSLT_HOST_RESET 304 #define XEN_VSCSIIF_RSLT_HOST_RESET 8
305 /* Unexpected interrupt */ 305 /* Unexpected interrupt */
306 #define XEN_VSCSIIF_RSLT_HOST_BAD_INTR 306 #define XEN_VSCSIIF_RSLT_HOST_BAD_INTR 9
307 /* Force command past mid-layer */ 307 /* Force command past mid-layer */
308 #define XEN_VSCSIIF_RSLT_HOST_PASSTHROUGH 308 #define XEN_VSCSIIF_RSLT_HOST_PASSTHROUGH 10
309 /* Retry requested */ 309 /* Retry requested */
310 #define XEN_VSCSIIF_RSLT_HOST_SOFT_ERROR 310 #define XEN_VSCSIIF_RSLT_HOST_SOFT_ERROR 11
311 /* Hidden retry requested */ 311 /* Hidden retry requested */
312 #define XEN_VSCSIIF_RSLT_HOST_IMM_RETRY 312 #define XEN_VSCSIIF_RSLT_HOST_IMM_RETRY 12
313 /* Requeue command requested */ 313 /* Requeue command requested */
314 #define XEN_VSCSIIF_RSLT_HOST_REQUEUE 314 #define XEN_VSCSIIF_RSLT_HOST_REQUEUE 13
315 /* Transport error disrupted I/O */ 315 /* Transport error disrupted I/O */
316 #define XEN_VSCSIIF_RSLT_HOST_TRANSPORT_DISRUP 316 #define XEN_VSCSIIF_RSLT_HOST_TRANSPORT_DISRUPTED 14
317 /* Transport class fastfailed */ 317 /* Transport class fastfailed */
318 #define XEN_VSCSIIF_RSLT_HOST_TRANSPORT_FAILFA 318 #define XEN_VSCSIIF_RSLT_HOST_TRANSPORT_FAILFAST 15
319 /* Permanent target failure */ 319 /* Permanent target failure */
320 #define XEN_VSCSIIF_RSLT_HOST_TARGET_FAILURE 320 #define XEN_VSCSIIF_RSLT_HOST_TARGET_FAILURE 16
321 /* Permanent nexus failure on path */ 321 /* Permanent nexus failure on path */
322 #define XEN_VSCSIIF_RSLT_HOST_NEXUS_FAILURE 322 #define XEN_VSCSIIF_RSLT_HOST_NEXUS_FAILURE 17
323 /* Space allocation on device failed */ 323 /* Space allocation on device failed */
324 #define XEN_VSCSIIF_RSLT_HOST_ALLOC_FAILURE 324 #define XEN_VSCSIIF_RSLT_HOST_ALLOC_FAILURE 18
325 /* Medium error */ 325 /* Medium error */
326 #define XEN_VSCSIIF_RSLT_HOST_MEDIUM_ERROR 326 #define XEN_VSCSIIF_RSLT_HOST_MEDIUM_ERROR 19
327 /* Transport marginal errors */ 327 /* Transport marginal errors */
328 #define XEN_VSCSIIF_RSLT_HOST_TRANSPORT_MARGIN 328 #define XEN_VSCSIIF_RSLT_HOST_TRANSPORT_MARGINAL 20
329 329
330 /* Result values of reset operations */ 330 /* Result values of reset operations */
331 #define XEN_VSCSIIF_RSLT_RESET_SUCCESS 0x2002 331 #define XEN_VSCSIIF_RSLT_RESET_SUCCESS 0x2002
332 #define XEN_VSCSIIF_RSLT_RESET_FAILED 0x2003 332 #define XEN_VSCSIIF_RSLT_RESET_FAILED 0x2003
333 333
334 DEFINE_RING_TYPES(vscsiif, struct vscsiif_requ 334 DEFINE_RING_TYPES(vscsiif, struct vscsiif_request, struct vscsiif_response);
335 335
336 336
337 #endif /*__XEN__PUBLIC_IO_SCSI_H__*/ 337 #endif /*__XEN__PUBLIC_IO_SCSI_H__*/
338 338
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.