2 * Copyright (c) 2010 by Panasas, Inc.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice immediately at the beginning of the file, without modification,
10 * this list of conditions, and the following disclaimer.
11 * 2. The name of the author may not be used to endorse or promote products
12 * derived from this software without specific prior written permission.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
18 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * "Faulty" Device. Victimize random commands with a Selection Timeout.
32 #define MAX_TGT VHBA_MAXTGT
37 #define DISK_NBLKS ((DISK_SIZE << 20) >> DISK_SHIFT)
40 #define PSEUDO_SPC (PSEUDO_SPT * PSEUDO_HDS)
51 static void vhba_task(void *, int);
52 static void faulty_act(faulty_t *, struct ccb_scsiio *);
55 vhba_init(vhba_softc_t *vhba)
57 static faulty_t vhbastatic;
58 vhbastatic.vhba = vhba;
59 vhbastatic.disk_size = DISK_SIZE << 20;
60 vhbastatic.disk = malloc(vhbastatic.disk_size, M_DEVBUF, M_WAITOK|M_ZERO);
61 vhba->private = &vhbastatic;
62 vhbastatic.ctr = (arc4random() & 0xffff) + 1;
63 TASK_INIT(&vhbastatic.qt, 0, vhba_task, &vhbastatic);
68 vhba_fini(vhba_softc_t *vhba)
70 faulty_t *vhbas = vhba->private;
72 free(vhbas->disk, M_DEVBUF);
76 vhba_kick(vhba_softc_t *vhba)
78 faulty_t *vhbas = vhba->private;
79 taskqueue_enqueue(taskqueue_swi, &vhbas->qt);
83 vhba_task(void *arg, int pending)
85 faulty_t *vhbas = arg;
88 mtx_lock(&vhbas->vhba->lock);
89 while ((ccbh = TAILQ_FIRST(&vhbas->vhba->actv)) != NULL) {
90 TAILQ_REMOVE(&vhbas->vhba->actv, ccbh, sim_links.tqe);
91 faulty_act(vhbas, (struct ccb_scsiio *)ccbh);
92 if (--vhbas->ctr == 0) {
94 vhbas->ctr = (arc4random() & 0xff) + 1;
97 while ((ccbh = TAILQ_FIRST(&vhbas->vhba->done)) != NULL) {
98 TAILQ_REMOVE(&vhbas->vhba->done, ccbh, sim_links.tqe);
99 xpt_done((union ccb *)ccbh);
101 mtx_unlock(&vhbas->vhba->lock);
105 faulty_act(faulty_t *vhbas, struct ccb_scsiio *csio)
108 cam_status camstatus;
109 uint8_t *cdb, *ptr, status;
114 status = SCSI_STATUS_OK;
116 memset(&csio->sense_data, 0, sizeof (csio->sense_data));
117 cdb = csio->cdb_io.cdb_bytes;
119 if (csio->ccb_h.target_id >= MAX_TGT) {
120 vhba_set_status(&csio->ccb_h, CAM_SEL_TIMEOUT);
121 TAILQ_INSERT_TAIL(&vhbas->vhba->done, &csio->ccb_h, sim_links.tqe);
126 vhba_set_status(&csio->ccb_h, CAM_SEL_TIMEOUT);
127 TAILQ_INSERT_TAIL(&vhbas->vhba->done, &csio->ccb_h, sim_links.tqe);
130 if (csio->ccb_h.target_lun >= MAX_LUN && cdb[0] != INQUIRY && cdb[0] != REPORT_LUNS && cdb[0] != REQUEST_SENSE) {
131 vhba_fill_sense(csio, SSD_KEY_ILLEGAL_REQUEST, 0x25, 0x0);
132 TAILQ_INSERT_TAIL(&vhbas->vhba->done, &csio->ccb_h, sim_links.tqe);
141 uint8_t page = cdb[2] & SMS_PAGE_CODE;
142 uint8_t pgctl = cdb[2] & SMS_PAGE_CTRL_MASK;
145 case SMS_FORMAT_DEVICE_PAGE:
146 case SMS_GEOMETRY_PAGE:
148 case SMS_CONTROL_MODE_PAGE:
149 case SMS_ALL_PAGES_PAGE:
152 vhba_fill_sense(csio, SSD_KEY_ILLEGAL_REQUEST, 0x24, 0x0);
153 TAILQ_INSERT_TAIL(&vhbas->vhba->done, &csio->ccb_h, sim_links.tqe);
156 memset(junk, 0, sizeof (junk));
157 if (cdb[1] & SMS_DBD) {
162 ptr[4] = ((1 << DISK_SHIFT) >> 24) & 0xff;
163 ptr[5] = ((1 << DISK_SHIFT) >> 16) & 0xff;
164 ptr[6] = ((1 << DISK_SHIFT) >> 8) & 0xff;
165 ptr[7] = ((1 << DISK_SHIFT)) & 0xff;
167 ptr[8] = (DISK_NBLKS >> 24) & 0xff;
168 ptr[9] = (DISK_NBLKS >> 16) & 0xff;
169 ptr[10] = (DISK_NBLKS >> 8) & 0xff;
170 ptr[11] = DISK_NBLKS & 0xff;
174 if (page == SMS_ALL_PAGES_PAGE || page == SMS_FORMAT_DEVICE_PAGE) {
175 ptr[0] = SMS_FORMAT_DEVICE_PAGE;
177 if (pgctl != SMS_PAGE_CTRL_CHANGEABLE) {
178 /* tracks per zone */
181 /* alternate sectors per zone */
184 /* alternate tracks per zone */
187 /* alternate tracks per logical unit */
190 /* sectors per track */
191 ptr[10] = (PSEUDO_SPT >> 8) & 0xff;
192 ptr[11] = PSEUDO_SPT & 0xff;
193 /* data bytes per physical sector */
194 ptr[12] = ((1 << DISK_SHIFT) >> 8) & 0xff;
195 ptr[13] = (1 << DISK_SHIFT) & 0xff;
199 /* track skew factor */
202 /* cylinder skew factor */
205 /* SSRC, HSEC, RMB, SURF */
210 if (page == SMS_ALL_PAGES_PAGE || page == SMS_GEOMETRY_PAGE) {
211 ptr[0] = SMS_GEOMETRY_PAGE;
213 if (pgctl != SMS_PAGE_CTRL_CHANGEABLE) {
214 uint32_t cyl = (DISK_NBLKS + ((PSEUDO_SPC - 1))) / PSEUDO_SPC;
215 /* number of cylinders */
216 ptr[2] = (cyl >> 24) & 0xff;
217 ptr[3] = (cyl >> 16) & 0xff;
219 /* number of heads */
221 /* starting cylinder- write precompensation */
225 /* starting cylinder- reduced write current */
229 /* drive step rate */
232 /* landing zone cylinder */
238 /* rotational offset */
240 /* medium rotation rate - 7200 RPM */
247 if (page == SMS_ALL_PAGES_PAGE || page == SMS_CACHE_PAGE) {
248 ptr[0] = SMS_CACHE_PAGE;
254 if (page == SMS_ALL_PAGES_PAGE || page == SMS_CONTROL_MODE_PAGE) {
255 ptr[0] = SMS_CONTROL_MODE_PAGE;
257 if (pgctl != SMS_PAGE_CTRL_CHANGEABLE) {
258 ptr[3] = 1 << 4; /* unrestricted reordering allowed */
259 ptr[8] = 0x75; /* 30000 ms */
264 nbyte = (char *)ptr - &junk[0];
267 if (cdb[0] == MODE_SENSE) {
268 data_len = min(cdb[4], csio->dxfer_len);
270 uint16_t tw = (cdb[7] << 8) | cdb[8];
271 data_len = min(tw, csio->dxfer_len);
273 data_len = min(data_len, nbyte);
275 memcpy(csio->data_ptr, junk, data_len);
277 csio->resid = csio->dxfer_len - data_len;
288 if (vhba_rwparm(cdb, &off, &data_len, DISK_NBLKS, DISK_SHIFT)) {
289 vhba_fill_sense(csio, SSD_KEY_ILLEGAL_REQUEST, 0x24, 0x0);
293 if ((cdb[0] & 0xf) == 8) {
294 memcpy(csio->data_ptr, &vhbas->disk[off], data_len);
296 memcpy(&vhbas->disk[off], csio->data_ptr, data_len);
298 csio->resid = csio->dxfer_len - data_len;
300 csio->resid = csio->dxfer_len;
305 if (cdb[2] || cdb[3] || cdb[4] || cdb[5]) {
306 vhba_fill_sense(csio, SSD_KEY_UNIT_ATTENTION, 0x24, 0x0);
309 if (cdb[8] & 0x1) { /* PMI */
310 csio->data_ptr[0] = 0xff;
311 csio->data_ptr[1] = 0xff;
312 csio->data_ptr[2] = 0xff;
313 csio->data_ptr[3] = 0xff;
315 uint64_t last_blk = DISK_NBLKS - 1;
316 if (last_blk < 0xffffffffULL) {
317 csio->data_ptr[0] = (last_blk >> 24) & 0xff;
318 csio->data_ptr[1] = (last_blk >> 16) & 0xff;
319 csio->data_ptr[2] = (last_blk >> 8) & 0xff;
320 csio->data_ptr[3] = (last_blk) & 0xff;
322 csio->data_ptr[0] = 0xff;
323 csio->data_ptr[1] = 0xff;
324 csio->data_ptr[2] = 0xff;
325 csio->data_ptr[3] = 0xff;
328 csio->data_ptr[4] = ((1 << DISK_SHIFT) >> 24) & 0xff;
329 csio->data_ptr[5] = ((1 << DISK_SHIFT) >> 16) & 0xff;
330 csio->data_ptr[6] = ((1 << DISK_SHIFT) >> 8) & 0xff;
331 csio->data_ptr[7] = ((1 << DISK_SHIFT)) & 0xff;
334 vhba_default_cmd(csio, MAX_LUN, NULL);
337 if (csio->scsi_status != SCSI_STATUS_OK) {
338 camstatus = CAM_SCSI_STATUS_ERROR;
339 if (csio->scsi_status == SCSI_STATUS_CHECK_COND) {
340 camstatus |= CAM_AUTOSNS_VALID;
343 csio->scsi_status = SCSI_STATUS_OK;
344 camstatus = CAM_REQ_CMP;
346 vhba_set_status(&csio->ccb_h, camstatus);
347 TAILQ_INSERT_TAIL(&vhbas->vhba->done, &csio->ccb_h, sim_links.tqe);
349 DEV_MODULE(vhba_faulty, vhba_modprobe, NULL);