| geom_io.c (93250) | geom_io.c (93778) |
|---|---|
| 1/*- 2 * Copyright (c) 2002 Poul-Henning Kamp 3 * Copyright (c) 2002 Networks Associates Technology, Inc. 4 * All rights reserved. 5 * 6 * This software was developed for the FreeBSD Project by Poul-Henning Kamp 7 * and NAI Labs, the Security Research Division of Network Associates, Inc. 8 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the --- 18 unchanged lines hidden (view full) --- 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * | 1/*- 2 * Copyright (c) 2002 Poul-Henning Kamp 3 * Copyright (c) 2002 Networks Associates Technology, Inc. 4 * All rights reserved. 5 * 6 * This software was developed for the FreeBSD Project by Poul-Henning Kamp 7 * and NAI Labs, the Security Research Division of Network Associates, Inc. 8 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the --- 18 unchanged lines hidden (view full) --- 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * |
| 35 * $FreeBSD: head/sys/geom/geom_io.c 93250 2002-03-26 22:07:38Z phk $ | 35 * $FreeBSD: head/sys/geom/geom_io.c 93778 2002-04-04 09:58:20Z phk $ |
| 36 */ 37 38 39#include <sys/param.h> 40#ifndef _KERNEL 41#include <stdio.h> 42#include <string.h> 43#include <stdlib.h> --- 174 unchanged lines hidden (view full) --- 218 if (error == EBUSY) 219 tsleep(&error, 0, "getattr_busy", hz); 220 221 } while(error == EBUSY); 222 return (error); 223} 224 225void | 36 */ 37 38 39#include <sys/param.h> 40#ifndef _KERNEL 41#include <stdio.h> 42#include <string.h> 43#include <stdlib.h> --- 174 unchanged lines hidden (view full) --- 218 if (error == EBUSY) 219 tsleep(&error, 0, "getattr_busy", hz); 220 221 } while(error == EBUSY); 222 return (error); 223} 224 225void |
| 226g_io_fail(struct bio *bp, int error) 227{ 228 229 bp->bio_error = error; 230 231 g_trace(G_T_BIO, 232 "bio_fail(%p) from %p(%s) to %p(%s) cmd %d error %d\n", 233 bp, bp->bio_from, bp->bio_from->geom->name, 234 bp->bio_to, bp->bio_to->name, bp->bio_cmd, bp->bio_error); 235 g_io_deliver(bp); 236 return; 237} 238 239void |
|
| 226g_io_request(struct bio *bp, struct g_consumer *cp) 227{ 228 int error; | 240g_io_request(struct bio *bp, struct g_consumer *cp) 241{ 242 int error; |
| 243 off_t excess; |
|
| 229 230 KASSERT(cp != NULL, ("bio_request on thin air")); 231 error = 0; 232 bp->bio_from = cp; 233 bp->bio_to = cp->provider; | 244 245 KASSERT(cp != NULL, ("bio_request on thin air")); 246 error = 0; 247 bp->bio_from = cp; 248 bp->bio_to = cp->provider; |
| 249 bp->bio_error = 0; 250 bp->bio_completed = 0; |
|
| 234 235 /* begin_stats(&bp->stats); */ 236 237 atomic_add_int(&cp->biocount, 1); | 251 252 /* begin_stats(&bp->stats); */ 253 254 atomic_add_int(&cp->biocount, 1); |
| 255 /* Fail on unattached consumers */ |
|
| 238 if (bp->bio_to == NULL) | 256 if (bp->bio_to == NULL) |
| 239 error = ENXIO; 240 if (!error) { 241 switch(bp->bio_cmd) { 242 case BIO_READ: 243 case BIO_GETATTR: 244 if (cp->acr == 0) 245 error = EPERM; 246 break; 247 case BIO_WRITE: 248 if (cp->acw == 0) 249 error = EPERM; 250 break; 251 case BIO_SETATTR: 252 case BIO_DELETE: 253 if ((cp->acw == 0) || (cp->ace == 0)) 254 error = EPERM; 255 break; 256 default: 257 error = EPERM; 258 break; | 257 return (g_io_fail(bp, ENXIO)); 258 /* Fail if access doesn't allow operation */ 259 switch(bp->bio_cmd) { 260 case BIO_READ: 261 case BIO_GETATTR: 262 if (cp->acr == 0) 263 return (g_io_fail(bp, EPERM)); 264 break; 265 case BIO_WRITE: 266 case BIO_DELETE: 267 if (cp->acw == 0) 268 return (g_io_fail(bp, EPERM)); 269 break; 270 case BIO_SETATTR: 271 if ((cp->acw == 0) || (cp->ace == 0)) 272 return (g_io_fail(bp, EPERM)); 273 break; 274 default: 275 return (g_io_fail(bp, EPERM)); 276 } 277 /* if provider is marked for error, don't disturb. */ 278 if (bp->bio_to->error) 279 return (g_io_fail(bp, bp->bio_to->error)); 280 switch(bp->bio_cmd) { 281 case BIO_READ: 282 case BIO_WRITE: 283 case BIO_DELETE: 284 /* Reject requests past the end of media. */ 285 if (bp->bio_offset > bp->bio_to->mediasize) 286 return (g_io_fail(bp, EIO)); 287 /* Truncate requests to the end of providers media. */ 288 excess = bp->bio_offset + bp->bio_length; 289 if (excess > bp->bio_to->mediasize) { 290 excess -= bp->bio_to->mediasize; 291 bp->bio_length -= excess; |
| 259 } | 292 } |
| 293 /* Deliver zero length transfers right here. */ 294 if (bp->bio_length == 0) 295 return (g_io_deliver(bp)); 296 break; 297 default: 298 break; |
|
| 260 } | 299 } |
| 261 /* if provider is marked for error, don't disturb */ 262 if (!error) 263 error = bp->bio_to->error; 264 if (error) { 265 bp->bio_error = error; 266 /* finish_stats(&bp->stats); */ 267 268 g_trace(G_T_BIO, 269 "bio_request(%p) from %p(%s) to %p(%s) cmd %d error %d\n", 270 bp, bp->bio_from, bp->bio_from->geom->name, 271 bp->bio_to, bp->bio_to->name, bp->bio_cmd, bp->bio_error); 272 g_bioq_enqueue_tail(bp, &g_bio_run_up); 273 mtx_lock(&Giant); 274 wakeup(&g_wait_up); 275 mtx_unlock(&Giant); 276 } else { 277 g_trace(G_T_BIO, "bio_request(%p) from %p(%s) to %p(%s) cmd %d", 278 bp, bp->bio_from, bp->bio_from->geom->name, 279 bp->bio_to, bp->bio_to->name, bp->bio_cmd); 280 g_bioq_enqueue_tail(bp, &g_bio_run_down); 281 mtx_lock(&Giant); 282 wakeup(&g_wait_down); 283 mtx_unlock(&Giant); 284 } | 300 /* Pass it on down. */ 301 g_trace(G_T_BIO, "bio_request(%p) from %p(%s) to %p(%s) cmd %d", 302 bp, bp->bio_from, bp->bio_from->geom->name, 303 bp->bio_to, bp->bio_to->name, bp->bio_cmd); 304 g_bioq_enqueue_tail(bp, &g_bio_run_down); 305 mtx_lock(&Giant); 306 wakeup(&g_wait_down); 307 mtx_unlock(&Giant); |
| 285} 286 287void 288g_io_deliver(struct bio *bp) 289{ 290 291 g_trace(G_T_BIO, 292 "g_io_deliver(%p) from %p(%s) to %p(%s) cmd %d error %d", --- 83 unchanged lines hidden --- | 308} 309 310void 311g_io_deliver(struct bio *bp) 312{ 313 314 g_trace(G_T_BIO, 315 "g_io_deliver(%p) from %p(%s) to %p(%s) cmd %d error %d", --- 83 unchanged lines hidden --- |