* than the level indicated above to trigger output.
*/
+#include <linux/config.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/kernel.h>
* it's not worth the risk */
return -EINVAL;
- for (i = 0; i < ARRAY_SIZE(sd_cache_types); i++) {
+ for (i = 0; i < sizeof(sd_cache_types)/sizeof(sd_cache_types[0]); i++) {
const int len = strlen(sd_cache_types[i]);
if (strncmp(sd_cache_types[i], buf, len) == 0 &&
buf[len] == '\n') {
return count;
}
-static ssize_t sd_store_allow_restart(struct class_device *cdev, const char *buf,
- size_t count)
-{
- struct scsi_disk *sdkp = to_scsi_disk(cdev);
- struct scsi_device *sdp = sdkp->device;
-
- if (!capable(CAP_SYS_ADMIN))
- return -EACCES;
-
- if (sdp->type != TYPE_DISK)
- return -EINVAL;
-
- sdp->allow_restart = simple_strtoul(buf, NULL, 10);
-
- return count;
-}
-
static ssize_t sd_show_cache_type(struct class_device *cdev, char *buf)
{
struct scsi_disk *sdkp = to_scsi_disk(cdev);
return snprintf(buf, 20, "%u\n", sdkp->DPOFUA);
}
-static ssize_t sd_show_allow_restart(struct class_device *cdev, char *buf)
-{
- struct scsi_disk *sdkp = to_scsi_disk(cdev);
-
- return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart);
-}
-
static struct class_device_attribute sd_disk_attrs[] = {
__ATTR(cache_type, S_IRUGO|S_IWUSR, sd_show_cache_type,
sd_store_cache_type),
__ATTR(FUA, S_IRUGO, sd_show_fua, NULL),
- __ATTR(allow_restart, S_IRUGO|S_IWUSR, sd_show_allow_restart,
- sd_store_allow_restart),
__ATTR_NULL,
};
SCpnt->cmnd[4] = (unsigned char) this_count;
SCpnt->cmnd[5] = 0;
}
- SCpnt->request_bufflen = this_count * sdp->sector_size;
+ SCpnt->request_bufflen = SCpnt->bufflen =
+ this_count * sdp->sector_size;
/*
* We shouldn't disconnect in the middle of a sector, so with a dumb
static void sd_rw_intr(struct scsi_cmnd * SCpnt)
{
int result = SCpnt->result;
- unsigned int xfer_size = SCpnt->request_bufflen;
- unsigned int good_bytes = result ? 0 : xfer_size;
- u64 start_lba = SCpnt->request->sector;
- u64 bad_lba;
+ int this_count = SCpnt->bufflen;
+ int good_bytes = (result == 0 ? this_count : 0);
+ sector_t block_sectors = 1;
+ u64 first_err_block;
+ sector_t error_sector;
struct scsi_sense_hdr sshdr;
int sense_valid = 0;
int sense_deferred = 0;
if (sense_valid)
sense_deferred = scsi_sense_is_deferred(&sshdr);
}
+
#ifdef CONFIG_SCSI_LOGGING
SCSI_LOG_HLCOMPLETE(1, printk("sd_rw_intr: %s: res=0x%x\n",
SCpnt->request->rq_disk->disk_name, result));
sshdr.sense_key, sshdr.asc, sshdr.ascq));
}
#endif
- if (driver_byte(result) != DRIVER_SENSE &&
- (!sense_valid || sense_deferred))
- goto out;
+ /*
+ Handle MEDIUM ERRORs that indicate partial success. Since this is a
+ relatively rare error condition, no care is taken to avoid
+ unnecessary additional work such as memcpy's that could be avoided.
+ */
+ if (driver_byte(result) != 0 &&
+ sense_valid && !sense_deferred) {
+ switch (sshdr.sense_key) {
+ case MEDIUM_ERROR:
+ if (!blk_fs_request(SCpnt->request))
+ break;
+ info_valid = scsi_get_sense_info_fld(
+ SCpnt->sense_buffer, SCSI_SENSE_BUFFERSIZE,
+ &first_err_block);
+ /*
+ * May want to warn and skip if following cast results
+ * in actual truncation (if sector_t < 64 bits)
+ */
+ error_sector = (sector_t)first_err_block;
+ if (SCpnt->request->bio != NULL)
+ block_sectors = bio_sectors(SCpnt->request->bio);
+ switch (SCpnt->device->sector_size) {
+ case 1024:
+ error_sector <<= 1;
+ if (block_sectors < 2)
+ block_sectors = 2;
+ break;
+ case 2048:
+ error_sector <<= 2;
+ if (block_sectors < 4)
+ block_sectors = 4;
+ break;
+ case 4096:
+ error_sector <<=3;
+ if (block_sectors < 8)
+ block_sectors = 8;
+ break;
+ case 256:
+ error_sector >>= 1;
+ break;
+ default:
+ break;
+ }
- switch (sshdr.sense_key) {
- case HARDWARE_ERROR:
- case MEDIUM_ERROR:
- if (!blk_fs_request(SCpnt->request))
- goto out;
- info_valid = scsi_get_sense_info_fld(SCpnt->sense_buffer,
- SCSI_SENSE_BUFFERSIZE,
- &bad_lba);
- if (!info_valid)
- goto out;
- if (xfer_size <= SCpnt->device->sector_size)
- goto out;
- switch (SCpnt->device->sector_size) {
- case 256:
- start_lba <<= 1;
+ error_sector &= ~(block_sectors - 1);
+ good_bytes = (error_sector - SCpnt->request->sector) << 9;
+ if (good_bytes < 0 || good_bytes >= this_count)
+ good_bytes = 0;
break;
- case 512:
- break;
- case 1024:
- start_lba >>= 1;
- break;
- case 2048:
- start_lba >>= 2;
+
+ case RECOVERED_ERROR: /* an error occurred, but it recovered */
+ case NO_SENSE: /* LLDD got sense data */
+ /*
+ * Inform the user, but make sure that it's not treated
+ * as a hard error.
+ */
+ scsi_print_sense("sd", SCpnt);
+ SCpnt->result = 0;
+ memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
+ good_bytes = this_count;
break;
- case 4096:
- start_lba >>= 3;
+
+ case ILLEGAL_REQUEST:
+ if (SCpnt->device->use_10_for_rw &&
+ (SCpnt->cmnd[0] == READ_10 ||
+ SCpnt->cmnd[0] == WRITE_10))
+ SCpnt->device->use_10_for_rw = 0;
+ if (SCpnt->device->use_10_for_ms &&
+ (SCpnt->cmnd[0] == MODE_SENSE_10 ||
+ SCpnt->cmnd[0] == MODE_SELECT_10))
+ SCpnt->device->use_10_for_ms = 0;
break;
+
default:
- /* Print something here with limiting frequency. */
- goto out;
break;
}
- /* This computation should always be done in terms of
- * the resolution of the device's medium.
- */
- good_bytes = (bad_lba - start_lba)*SCpnt->device->sector_size;
- break;
- case RECOVERED_ERROR:
- case NO_SENSE:
- /* Inform the user, but make sure that it's not treated
- * as a hard error.
- */
- scsi_print_sense("sd", SCpnt);
- SCpnt->result = 0;
- memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
- good_bytes = xfer_size;
- break;
- case ILLEGAL_REQUEST:
- if (SCpnt->device->use_10_for_rw &&
- (SCpnt->cmnd[0] == READ_10 ||
- SCpnt->cmnd[0] == WRITE_10))
- SCpnt->device->use_10_for_rw = 0;
- if (SCpnt->device->use_10_for_ms &&
- (SCpnt->cmnd[0] == MODE_SENSE_10 ||
- SCpnt->cmnd[0] == MODE_SELECT_10))
- SCpnt->device->use_10_for_ms = 0;
- break;
- default:
- break;
}
- out:
- scsi_io_completion(SCpnt, good_bytes);
+ /*
+ * This calls the generic completion function, now that we know
+ * how many actual sectors finished, and how many sectors we need
+ * to say have failed.
+ */
+ scsi_io_completion(SCpnt, good_bytes, block_sectors << 9);
}
static int media_not_present(struct scsi_disk *sdkp,
git://git.onelab.eu / linux-2.6.git / blobdiff