* global variable (boot or module load time) settings.
*
* A specific LUN is scanned via an INQUIRY command; if the LUN has a
- * device attached, a Scsi_Device is allocated and setup for it.
+ * device attached, a scsi_device is allocated and setup for it.
*
* For every id of every channel on the given host:
*
* device or storage attached to LUN 0):
*
* If LUN 0 has a device attached, allocate and setup a
- * Scsi_Device for it.
+ * scsi_device for it.
*
* If target is SCSI-3 or up, issue a REPORT LUN, and scan
* all of the LUNs returned by the REPORT LUN; else,
#include <scsi/scsi_host.h>
#include <scsi/scsi_request.h>
#include <scsi/scsi_transport.h>
+#include <scsi/scsi_eh.h>
#include "scsi_priv.h"
#include "scsi_logging.h"
#define SCSI_SCAN_TARGET_PRESENT 1
#define SCSI_SCAN_LUN_PRESENT 2
-static char *scsi_null_device_strs = "nullnullnullnull";
+static const char *scsi_null_device_strs = "nullnullnullnull";
#define MAX_SCSI_LUNS 512
/**
* scsi_unlock_floptical - unlock device via a special MODE SENSE command
- * @sreq: used to send the command
+ * @sdev: scsi device to send command to
* @result: area to store the result of the MODE SENSE
*
* Description:
- * Send a vendor specific MODE SENSE (not a MODE SELECT) command using
- * @sreq to unlock a device, storing the (unused) results into result.
+ * Send a vendor specific MODE SENSE (not a MODE SELECT) command.
* Called for BLIST_KEY devices.
**/
-static void scsi_unlock_floptical(struct scsi_request *sreq,
+static void scsi_unlock_floptical(struct scsi_device *sdev,
unsigned char *result)
{
unsigned char scsi_cmd[MAX_COMMAND_SIZE];
scsi_cmd[1] = 0;
scsi_cmd[2] = 0x2e;
scsi_cmd[3] = 0;
- scsi_cmd[4] = 0x2a; /* size */
+ scsi_cmd[4] = 0x2a; /* size */
scsi_cmd[5] = 0;
- sreq->sr_cmd_len = 0;
- sreq->sr_data_direction = DMA_FROM_DEVICE;
- scsi_wait_req(sreq, scsi_cmd, result, 0x2a /* size */, SCSI_TIMEOUT, 3);
+ scsi_execute_req(sdev, scsi_cmd, DMA_FROM_DEVICE, result, 0x2a, NULL,
+ SCSI_TIMEOUT, 3);
}
/**
* Return value:
* scsi_Device pointer, or NULL on failure.
**/
-static struct scsi_device *scsi_alloc_sdev(struct Scsi_Host *shost,
- uint channel, uint id, uint lun)
+static struct scsi_device *scsi_alloc_sdev(struct scsi_target *starget,
+ unsigned int lun, void *hostdata)
{
- struct scsi_device *sdev, *device;
- unsigned long flags;
+ struct scsi_device *sdev;
+ int display_failure_msg = 1, ret;
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
- sdev = kmalloc(sizeof(*sdev) + shost->transportt->size, GFP_ATOMIC);
+ sdev = kzalloc(sizeof(*sdev) + shost->transportt->device_size,
+ GFP_ATOMIC);
if (!sdev)
goto out;
- memset(sdev, 0, sizeof(*sdev));
sdev->vendor = scsi_null_device_strs;
sdev->model = scsi_null_device_strs;
sdev->rev = scsi_null_device_strs;
sdev->host = shost;
- sdev->id = id;
+ sdev->id = starget->id;
sdev->lun = lun;
- sdev->channel = channel;
+ sdev->channel = starget->channel;
sdev->sdev_state = SDEV_CREATED;
INIT_LIST_HEAD(&sdev->siblings);
INIT_LIST_HEAD(&sdev->same_target_siblings);
INIT_LIST_HEAD(&sdev->starved_entry);
spin_lock_init(&sdev->list_lock);
+ sdev->sdev_gendev.parent = get_device(&starget->dev);
+ sdev->sdev_target = starget;
+
+ /* usually NULL and set by ->slave_alloc instead */
+ sdev->hostdata = hostdata;
/* if the device needs this changing, it may do so in the
* slave_configure function */
*/
sdev->borken = 1;
- spin_lock_init(&sdev->sdev_lock);
sdev->request_queue = scsi_alloc_queue(sdev);
- if (!sdev->request_queue)
- goto out_free_dev;
+ if (!sdev->request_queue) {
+ /* release fn is set up in scsi_sysfs_device_initialise, so
+ * have to free and put manually here */
+ put_device(&starget->dev);
+ kfree(sdev);
+ goto out;
+ }
sdev->request_queue->queuedata = sdev;
scsi_adjust_queue_depth(sdev, 0, sdev->host->cmd_per_lun);
+ scsi_sysfs_device_initialize(sdev);
+
if (shost->hostt->slave_alloc) {
- if (shost->hostt->slave_alloc(sdev))
- goto out_free_queue;
+ ret = shost->hostt->slave_alloc(sdev);
+ if (ret) {
+ /*
+ * if LLDD reports slave not present, don't clutter
+ * console with alloc failure messages
+ */
+ if (ret == -ENXIO)
+ display_failure_msg = 0;
+ goto out_device_destroy;
+ }
}
- if (shost->transportt->setup) {
- if (shost->transportt->setup(sdev))
- goto out_cleanup_slave;
- }
+ return sdev;
- if (get_device(&sdev->host->shost_gendev)) {
-
- device_initialize(&sdev->sdev_gendev);
- sdev->sdev_gendev.parent = &sdev->host->shost_gendev;
- sdev->sdev_gendev.bus = &scsi_bus_type;
- sdev->sdev_gendev.release = scsi_device_dev_release;
- sprintf(sdev->sdev_gendev.bus_id,"%d:%d:%d:%d",
- sdev->host->host_no, sdev->channel, sdev->id,
- sdev->lun);
-
- class_device_initialize(&sdev->sdev_classdev);
- sdev->sdev_classdev.dev = &sdev->sdev_gendev;
- sdev->sdev_classdev.class = &sdev_class;
- snprintf(sdev->sdev_classdev.class_id, BUS_ID_SIZE,
- "%d:%d:%d:%d", sdev->host->host_no,
- sdev->channel, sdev->id, sdev->lun);
-
- class_device_initialize(&sdev->transport_classdev);
- sdev->transport_classdev.dev = &sdev->sdev_gendev;
- sdev->transport_classdev.class = sdev->host->transportt->class;
- snprintf(sdev->transport_classdev.class_id, BUS_ID_SIZE,
- "%d:%d:%d:%d", sdev->host->host_no,
- sdev->channel, sdev->id, sdev->lun);
- } else
- goto out_cleanup_transport;
+out_device_destroy:
+ transport_destroy_device(&sdev->sdev_gendev);
+ put_device(&sdev->sdev_gendev);
+out:
+ if (display_failure_msg)
+ printk(ALLOC_FAILURE_MSG, __FUNCTION__);
+ return NULL;
+}
+static void scsi_target_dev_release(struct device *dev)
+{
+ struct device *parent = dev->parent;
+ struct scsi_target *starget = to_scsi_target(dev);
+
+ kfree(starget);
+ put_device(parent);
+}
+
+int scsi_is_target_device(const struct device *dev)
+{
+ return dev->release == scsi_target_dev_release;
+}
+EXPORT_SYMBOL(scsi_is_target_device);
+
+static struct scsi_target *__scsi_find_target(struct device *parent,
+ int channel, uint id)
+{
+ struct scsi_target *starget, *found_starget = NULL;
+ struct Scsi_Host *shost = dev_to_shost(parent);
/*
- * If there are any same target siblings, add this to the
- * sibling list
+ * Search for an existing target for this sdev.
*/
- spin_lock_irqsave(shost->host_lock, flags);
- list_for_each_entry(device, &shost->__devices, siblings) {
- if (device->id == sdev->id &&
- device->channel == sdev->channel) {
- list_add_tail(&sdev->same_target_siblings,
- &device->same_target_siblings);
- sdev->scsi_level = device->scsi_level;
+ list_for_each_entry(starget, &shost->__targets, siblings) {
+ if (starget->id == id &&
+ starget->channel == channel) {
+ found_starget = starget;
break;
}
}
+ if (found_starget)
+ get_device(&found_starget->dev);
- /*
- * If there wasn't another lun already configured at this
- * target, then default this device to SCSI_2 until we
- * know better
- */
- if (!sdev->scsi_level)
- sdev->scsi_level = SCSI_2;
+ return found_starget;
+}
+
+static struct scsi_target *scsi_alloc_target(struct device *parent,
+ int channel, uint id)
+{
+ struct Scsi_Host *shost = dev_to_shost(parent);
+ struct device *dev = NULL;
+ unsigned long flags;
+ const int size = sizeof(struct scsi_target)
+ + shost->transportt->target_size;
+ struct scsi_target *starget;
+ struct scsi_target *found_target;
+ int error;
- list_add_tail(&sdev->siblings, &shost->__devices);
+ starget = kzalloc(size, GFP_KERNEL);
+ if (!starget) {
+ printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__);
+ return NULL;
+ }
+ dev = &starget->dev;
+ device_initialize(dev);
+ starget->reap_ref = 1;
+ dev->parent = get_device(parent);
+ dev->release = scsi_target_dev_release;
+ sprintf(dev->bus_id, "target%d:%d:%d",
+ shost->host_no, channel, id);
+ starget->id = id;
+ starget->channel = channel;
+ INIT_LIST_HEAD(&starget->siblings);
+ INIT_LIST_HEAD(&starget->devices);
+ starget->state = STARGET_RUNNING;
+ retry:
+ spin_lock_irqsave(shost->host_lock, flags);
+
+ found_target = __scsi_find_target(parent, channel, id);
+ if (found_target)
+ goto found;
+
+ list_add_tail(&starget->siblings, &shost->__targets);
spin_unlock_irqrestore(shost->host_lock, flags);
- return sdev;
+ /* allocate and add */
+ transport_setup_device(dev);
+ error = device_add(dev);
+ if (error) {
+ dev_err(dev, "target device_add failed, error %d\n", error);
+ spin_lock_irqsave(shost->host_lock, flags);
+ list_del_init(&starget->siblings);
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ transport_destroy_device(dev);
+ put_device(parent);
+ kfree(starget);
+ return NULL;
+ }
+ transport_add_device(dev);
+ if (shost->hostt->target_alloc) {
+ error = shost->hostt->target_alloc(starget);
+
+ if(error) {
+ dev_printk(KERN_ERR, dev, "target allocation failed, error %d\n", error);
+ /* don't want scsi_target_reap to do the final
+ * put because it will be under the host lock */
+ get_device(dev);
+ scsi_target_reap(starget);
+ put_device(dev);
+ return NULL;
+ }
+ }
-out_cleanup_transport:
- if (shost->transportt->cleanup)
- shost->transportt->cleanup(sdev);
-out_cleanup_slave:
- if (shost->hostt->slave_destroy)
- shost->hostt->slave_destroy(sdev);
-out_free_queue:
- scsi_free_queue(sdev->request_queue);
-out_free_dev:
- kfree(sdev);
-out:
- printk(ALLOC_FAILURE_MSG, __FUNCTION__);
- return NULL;
+ return starget;
+
+ found:
+ found_target->reap_ref++;
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ put_device(parent);
+ if (found_target->state != STARGET_DEL) {
+ kfree(starget);
+ return found_target;
+ }
+ /* Unfortunately, we found a dying target; need to
+ * wait until it's dead before we can get a new one */
+ put_device(&found_target->dev);
+ flush_scheduled_work();
+ goto retry;
+}
+
+static void scsi_target_reap_usercontext(void *data)
+{
+ struct scsi_target *starget = data;
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+ unsigned long flags;
+
+ transport_remove_device(&starget->dev);
+ device_del(&starget->dev);
+ transport_destroy_device(&starget->dev);
+ spin_lock_irqsave(shost->host_lock, flags);
+ if (shost->hostt->target_destroy)
+ shost->hostt->target_destroy(starget);
+ list_del_init(&starget->siblings);
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ put_device(&starget->dev);
+}
+
+/**
+ * scsi_target_reap - check to see if target is in use and destroy if not
+ *
+ * @starget: target to be checked
+ *
+ * This is used after removing a LUN or doing a last put of the target
+ * it checks atomically that nothing is using the target and removes
+ * it if so.
+ */
+void scsi_target_reap(struct scsi_target *starget)
+{
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+ unsigned long flags;
+
+ spin_lock_irqsave(shost->host_lock, flags);
+
+ if (--starget->reap_ref == 0 && list_empty(&starget->devices)) {
+ BUG_ON(starget->state == STARGET_DEL);
+ starget->state = STARGET_DEL;
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ execute_in_process_context(scsi_target_reap_usercontext,
+ starget, &starget->ew);
+ return;
+
+ }
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ return;
}
/**
* scsi_probe_lun - probe a single LUN using a SCSI INQUIRY
- * @sreq: used to send the INQUIRY
+ * @sdev: scsi_device to probe
* @inq_result: area to store the INQUIRY result
+ * @result_len: len of inq_result
* @bflags: store any bflags found here
*
* Description:
- * Probe the lun associated with @sreq using a standard SCSI INQUIRY;
+ * Probe the lun associated with @req using a standard SCSI INQUIRY;
*
- * If the INQUIRY is successful, sreq->sr_result is zero and: the
+ * If the INQUIRY is successful, zero is returned and the
* INQUIRY data is in @inq_result; the scsi_level and INQUIRY length
- * are copied to the Scsi_Device at @sreq->sr_device (sdev);
- * any flags value is stored in *@bflags.
+ * are copied to the scsi_device any flags value is stored in *@bflags.
**/
-static void scsi_probe_lun(struct scsi_request *sreq, char *inq_result,
- int *bflags)
+static int scsi_probe_lun(struct scsi_device *sdev, char *inq_result,
+ int result_len, int *bflags)
{
- struct scsi_device *sdev = sreq->sr_device; /* a bit ugly */
unsigned char scsi_cmd[MAX_COMMAND_SIZE];
- int possible_inq_resp_len;
- int count = 0;
+ int first_inquiry_len, try_inquiry_len, next_inquiry_len;
+ int response_len = 0;
+ int pass, count, result;
+ struct scsi_sense_hdr sshdr;
*bflags = 0;
- repeat_inquiry:
- SCSI_LOG_SCAN_BUS(3, printk(KERN_INFO "scsi scan: INQUIRY to host %d"
- " channel %d id %d lun %d\n", sdev->host->host_no,
- sdev->channel, sdev->id, sdev->lun));
-
- memset(scsi_cmd, 0, 6);
- scsi_cmd[0] = INQUIRY;
- scsi_cmd[4] = 36; /* issue conservative alloc_length */
- sreq->sr_cmd_len = 0;
- sreq->sr_data_direction = DMA_FROM_DEVICE;
-
- memset(inq_result, 0, 36);
- scsi_wait_req(sreq, (void *) scsi_cmd, (void *) inq_result, 36,
- HZ/2 + HZ*scsi_inq_timeout, 3);
-
- SCSI_LOG_SCAN_BUS(3, printk(KERN_INFO "scsi scan: 1st INQUIRY %s with"
- " code 0x%x\n", sreq->sr_result ?
- "failed" : "successful", sreq->sr_result));
- ++count;
-
- if (sreq->sr_result) {
- if ((driver_byte(sreq->sr_result) & DRIVER_SENSE) != 0 &&
- (sreq->sr_sense_buffer[2] & 0xf) == UNIT_ATTENTION &&
- (sreq->sr_sense_buffer[12] == 0x28 ||
- sreq->sr_sense_buffer[12] == 0x29) &&
- sreq->sr_sense_buffer[13] == 0) {
- /* not-ready to ready transition or power-on - good */
- /* dpg: bogus? INQUIRY never returns UNIT_ATTENTION */
- /* Supposedly, but many buggy devices do so anyway */
- if (count < 3)
- goto repeat_inquiry;
- }
- /*
- * assume no peripheral if any other sort of error
- */
- return;
- }
- /*
- * Get any flags for this device.
- *
- * XXX add a bflags to Scsi_Device, and replace the corresponding
- * bit fields in Scsi_Device, so bflags need not be passed as an
- * argument.
- */
- *bflags |= scsi_get_device_flags(sdev, &inq_result[8], &inq_result[16]);
+ /* Perform up to 3 passes. The first pass uses a conservative
+ * transfer length of 36 unless sdev->inquiry_len specifies a
+ * different value. */
+ first_inquiry_len = sdev->inquiry_len ? sdev->inquiry_len : 36;
+ try_inquiry_len = first_inquiry_len;
+ pass = 1;
- possible_inq_resp_len = (unsigned char) inq_result[4] + 5;
- if (BLIST_INQUIRY_36 & *bflags)
- possible_inq_resp_len = 36;
- else if (BLIST_INQUIRY_58 & *bflags)
- possible_inq_resp_len = 58;
- else if (possible_inq_resp_len > 255)
- possible_inq_resp_len = 36; /* sanity */
+ next_pass:
+ SCSI_LOG_SCAN_BUS(3, sdev_printk(KERN_INFO, sdev,
+ "scsi scan: INQUIRY pass %d length %d\n",
+ pass, try_inquiry_len));
- if (possible_inq_resp_len > 36) { /* do additional INQUIRY */
+ /* Each pass gets up to three chances to ignore Unit Attention */
+ for (count = 0; count < 3; ++count) {
memset(scsi_cmd, 0, 6);
scsi_cmd[0] = INQUIRY;
- scsi_cmd[4] = (unsigned char) possible_inq_resp_len;
- sreq->sr_cmd_len = 0;
- sreq->sr_data_direction = DMA_FROM_DEVICE;
- /*
- * re-zero inq_result just to be safe.
- */
- memset(inq_result, 0, possible_inq_resp_len);
- scsi_wait_req(sreq, (void *) scsi_cmd,
- (void *) inq_result,
- possible_inq_resp_len, (1+scsi_inq_timeout)*(HZ/2), 3);
- SCSI_LOG_SCAN_BUS(3, printk(KERN_INFO "scsi scan: 2nd INQUIRY"
- " %s with code 0x%x\n", sreq->sr_result ?
- "failed" : "successful", sreq->sr_result));
- if (sreq->sr_result) {
- /* if the longer inquiry has failed, flag the device
- * as only accepting 36 byte inquiries and retry the
- * 36 byte inquiry */
- printk(KERN_INFO "scsi scan: %d byte inquiry failed"
- " with code %d. Consider BLIST_INQUIRY_36 for"
- " this device\n", possible_inq_resp_len,
- sreq->sr_result);
- *bflags = BLIST_INQUIRY_36;
- goto repeat_inquiry;
+ scsi_cmd[4] = (unsigned char) try_inquiry_len;
+
+ memset(inq_result, 0, try_inquiry_len);
+
+ result = scsi_execute_req(sdev, scsi_cmd, DMA_FROM_DEVICE,
+ inq_result, try_inquiry_len, &sshdr,
+ HZ / 2 + HZ * scsi_inq_timeout, 3);
+
+ SCSI_LOG_SCAN_BUS(3, printk(KERN_INFO "scsi scan: INQUIRY %s "
+ "with code 0x%x\n",
+ result ? "failed" : "successful", result));
+
+ if (result) {
+ /*
+ * not-ready to ready transition [asc/ascq=0x28/0x0]
+ * or power-on, reset [asc/ascq=0x29/0x0], continue.
+ * INQUIRY should not yield UNIT_ATTENTION
+ * but many buggy devices do so anyway.
+ */
+ if ((driver_byte(result) & DRIVER_SENSE) &&
+ scsi_sense_valid(&sshdr)) {
+ if ((sshdr.sense_key == UNIT_ATTENTION) &&
+ ((sshdr.asc == 0x28) ||
+ (sshdr.asc == 0x29)) &&
+ (sshdr.ascq == 0))
+ continue;
+ }
}
+ break;
+ }
+
+ if (result == 0) {
+ response_len = (unsigned char) inq_result[4] + 5;
+ if (response_len > 255)
+ response_len = first_inquiry_len; /* sanity */
/*
- * The INQUIRY can change, this means the length can change.
+ * Get any flags for this device.
+ *
+ * XXX add a bflags to scsi_device, and replace the
+ * corresponding bit fields in scsi_device, so bflags
+ * need not be passed as an argument.
*/
- possible_inq_resp_len = (unsigned char) inq_result[4] + 5;
- if (BLIST_INQUIRY_58 & *bflags)
- possible_inq_resp_len = 58;
- else if (possible_inq_resp_len > 255)
- possible_inq_resp_len = 36; /* sanity */
+ *bflags = scsi_get_device_flags(sdev, &inq_result[8],
+ &inq_result[16]);
+
+ /* When the first pass succeeds we gain information about
+ * what larger transfer lengths might work. */
+ if (pass == 1) {
+ if (BLIST_INQUIRY_36 & *bflags)
+ next_inquiry_len = 36;
+ else if (BLIST_INQUIRY_58 & *bflags)
+ next_inquiry_len = 58;
+ else if (sdev->inquiry_len)
+ next_inquiry_len = sdev->inquiry_len;
+ else
+ next_inquiry_len = response_len;
+
+ /* If more data is available perform the second pass */
+ if (next_inquiry_len > try_inquiry_len) {
+ try_inquiry_len = next_inquiry_len;
+ pass = 2;
+ goto next_pass;
+ }
+ }
+
+ } else if (pass == 2) {
+ printk(KERN_INFO "scsi scan: %d byte inquiry failed. "
+ "Consider BLIST_INQUIRY_36 for this device\n",
+ try_inquiry_len);
+
+ /* If this pass failed, the third pass goes back and transfers
+ * the same amount as we successfully got in the first pass. */
+ try_inquiry_len = first_inquiry_len;
+ pass = 3;
+ goto next_pass;
}
- sdev->inquiry_len = possible_inq_resp_len;
+ /* If the last transfer attempt got an error, assume the
+ * peripheral doesn't exist or is dead. */
+ if (result)
+ return -EIO;
+
+ /* Don't report any more data than the device says is valid */
+ sdev->inquiry_len = min(try_inquiry_len, response_len);
/*
* XXX Abort if the response length is less than 36? If less than
if (sdev->scsi_level >= 2 ||
(sdev->scsi_level == 1 && (inq_result[3] & 0x0f) == 1))
sdev->scsi_level++;
+ sdev->sdev_target->scsi_level = sdev->scsi_level;
- return;
+ return 0;
}
/**
- * scsi_add_lun - allocate and fully initialze a Scsi_Device
- * @sdevscan: holds information to be stored in the new Scsi_Device
- * @sdevnew: store the address of the newly allocated Scsi_Device
+ * scsi_add_lun - allocate and fully initialze a scsi_device
+ * @sdevscan: holds information to be stored in the new scsi_device
+ * @sdevnew: store the address of the newly allocated scsi_device
* @inq_result: holds the result of a previous INQUIRY to the LUN
* @bflags: black/white list flag
*
* Description:
- * Allocate and initialize a Scsi_Device matching sdevscan. Optionally
+ * Allocate and initialize a scsi_device matching sdevscan. Optionally
* set fields based on values in *@bflags. If @sdevnew is not
- * NULL, store the address of the new Scsi_Device in *@sdevnew (needed
+ * NULL, store the address of the new scsi_device in *@sdevnew (needed
* when scanning a particular LUN).
*
* Return:
- * SCSI_SCAN_NO_RESPONSE: could not allocate or setup a Scsi_Device
- * SCSI_SCAN_LUN_PRESENT: a new Scsi_Device was allocated and initialized
+ * SCSI_SCAN_NO_RESPONSE: could not allocate or setup a scsi_device
+ * SCSI_SCAN_LUN_PRESENT: a new scsi_device was allocated and initialized
**/
static int scsi_add_lun(struct scsi_device *sdev, char *inq_result, int *bflags)
{
- struct scsi_device *sdev_sibling;
- struct scsi_target *starget;
- unsigned long flags;
-
/*
* XXX do not save the inquiry, since it can change underneath us,
* save just vendor/model/rev.
*/
inq_result[0] = TYPE_ROM;
inq_result[1] |= 0x80; /* removable */
- }
+ } else if (*bflags & BLIST_NO_ULD_ATTACH)
+ sdev->no_uld_attach = 1;
switch (sdev->type = (inq_result[0] & 0x1f)) {
case TYPE_TAPE:
case TYPE_MEDIUM_CHANGER:
case TYPE_ENCLOSURE:
case TYPE_COMM:
+ case TYPE_RAID:
+ case TYPE_RBC:
sdev->writeable = 1;
break;
case TYPE_WORM:
*
* The above is vague, as it implies that we could treat 001 and
* 011 the same. Stay compatible with previous code, and create a
- * Scsi_Device for a PQ of 1
+ * scsi_device for a PQ of 1
*
* Don't set the device offline here; rather let the upper
* level drivers eval the PQ to decide whether they should
if (inq_result[7] & 0x10)
sdev->sdtr = 1;
- sprintf(sdev->devfs_name, "scsi/host%d/bus%d/target%d/lun%d",
- sdev->host->host_no, sdev->channel,
- sdev->id, sdev->lun);
-
/*
- * End driverfs/devfs code.
+ * End sysfs code.
*/
if ((sdev->scsi_level >= SCSI_2) && (inq_result[7] & 2) &&
if ((*bflags & BLIST_BORKEN) == 0)
sdev->borken = 0;
+ /*
+ * Apparently some really broken devices (contrary to the SCSI
+ * standards) need to be selected without asserting ATN
+ */
+ if (*bflags & BLIST_SELECT_NO_ATN)
+ sdev->select_no_atn = 1;
+
+ /*
+ * Maximum 512 sector transfer length
+ * broken RA4x00 Compaq Disk Array
+ */
+ if (*bflags & BLIST_MAX_512)
+ blk_queue_max_sectors(sdev->request_queue, 512);
+
/*
* Some devices may not want to have a start command automatically
* issued when a device is added.
if (*bflags & BLIST_NOSTARTONADD)
sdev->no_start_on_add = 1;
- /*
- * If we need to allow I/O to only one of the luns attached to
- * this target id at a time set single_lun, and allocate or modify
- * sdev_target.
- */
- if (*bflags & BLIST_SINGLELUN) {
+ if (*bflags & BLIST_SINGLELUN)
sdev->single_lun = 1;
- spin_lock_irqsave(sdev->host->host_lock, flags);
- starget = NULL;
- /*
- * Search for an existing target for this sdev.
- */
- list_for_each_entry(sdev_sibling, &sdev->same_target_siblings,
- same_target_siblings) {
- if (sdev_sibling->sdev_target != NULL) {
- starget = sdev_sibling->sdev_target;
- break;
- }
- }
- if (!starget) {
- starget = kmalloc(sizeof(*starget), GFP_ATOMIC);
- if (!starget) {
- printk(ALLOC_FAILURE_MSG, __FUNCTION__);
- spin_unlock_irqrestore(sdev->host->host_lock,
- flags);
- return SCSI_SCAN_NO_RESPONSE;
- }
- starget->starget_refcnt = 0;
- starget->starget_sdev_user = NULL;
- }
- starget->starget_refcnt++;
- sdev->sdev_target = starget;
- spin_unlock_irqrestore(sdev->host->host_lock, flags);
- }
+
sdev->use_10_for_rw = 1;
if (*bflags & BLIST_NOT_LOCKABLE)
sdev->lockable = 0;
- if(sdev->host->hostt->slave_configure)
- sdev->host->hostt->slave_configure(sdev);
+ if (*bflags & BLIST_RETRY_HWERROR)
+ sdev->retry_hwerror = 1;
+
+ transport_configure_device(&sdev->sdev_gendev);
+
+ if (sdev->host->hostt->slave_configure) {
+ int ret = sdev->host->hostt->slave_configure(sdev);
+ if (ret) {
+ /*
+ * if LLDD reports slave not present, don't clutter
+ * console with alloc failure messages
+ */
+ if (ret != -ENXIO) {
+ sdev_printk(KERN_ERR, sdev,
+ "failed to configure device\n");
+ }
+ return SCSI_SCAN_NO_RESPONSE;
+ }
+ }
/*
* Ok, the device is now all set up, we can
* register it and tell the rest of the kernel
* about it.
*/
- scsi_sysfs_add_sdev(sdev);
+ if (scsi_sysfs_add_sdev(sdev) != 0)
+ return SCSI_SCAN_NO_RESPONSE;
return SCSI_SCAN_LUN_PRESENT;
}
+static inline void scsi_destroy_sdev(struct scsi_device *sdev)
+{
+ if (sdev->host->hostt->slave_destroy)
+ sdev->host->hostt->slave_destroy(sdev);
+ transport_destroy_device(&sdev->sdev_gendev);
+ put_device(&sdev->sdev_gendev);
+}
+
+
/**
* scsi_probe_and_add_lun - probe a LUN, if a LUN is found add it
- * @sdevscan: probe the LUN corresponding to this Scsi_Device
- * @sdevnew: store the value of any new Scsi_Device allocated
+ * @starget: pointer to target device structure
+ * @lun: LUN of target device
+ * @sdevscan: probe the LUN corresponding to this scsi_device
+ * @sdevnew: store the value of any new scsi_device allocated
* @bflagsp: store bflags here if not NULL
*
* Description:
* allocate and set it up by calling scsi_add_lun.
*
* Return:
- * SCSI_SCAN_NO_RESPONSE: could not allocate or setup a Scsi_Device
+ * SCSI_SCAN_NO_RESPONSE: could not allocate or setup a scsi_device
* SCSI_SCAN_TARGET_PRESENT: target responded, but no device is
* attached at the LUN
- * SCSI_SCAN_LUN_PRESENT: a new Scsi_Device was allocated and initialized
+ * SCSI_SCAN_LUN_PRESENT: a new scsi_device was allocated and initialized
**/
-static int scsi_probe_and_add_lun(struct Scsi_Host *host,
- uint channel, uint id, uint lun, int *bflagsp,
- struct scsi_device **sdevp, int rescan)
+static int scsi_probe_and_add_lun(struct scsi_target *starget,
+ uint lun, int *bflagsp,
+ struct scsi_device **sdevp, int rescan,
+ void *hostdata)
{
struct scsi_device *sdev;
- struct scsi_request *sreq;
unsigned char *result;
- int bflags, res = SCSI_SCAN_NO_RESPONSE;
+ int bflags, res = SCSI_SCAN_NO_RESPONSE, result_len = 256;
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
/*
* The rescan flag is used as an optimization, the first scan of a
* host adapter calls into here with rescan == 0.
*/
- if (rescan) {
- sdev = scsi_device_lookup(host, channel, id, lun);
- if (sdev) {
+ sdev = scsi_device_lookup_by_target(starget, lun);
+ if (sdev) {
+ if (rescan || sdev->sdev_state != SDEV_CREATED) {
SCSI_LOG_SCAN_BUS(3, printk(KERN_INFO
- "scsi scan: device exists on <%d:%d:%d:%d>\n",
- host->host_no, channel, id, lun));
+ "scsi scan: device exists on %s\n",
+ sdev->sdev_gendev.bus_id));
if (sdevp)
*sdevp = sdev;
+ else
+ scsi_device_put(sdev);
+
if (bflagsp)
*bflagsp = scsi_get_device_flags(sdev,
sdev->vendor,
sdev->model);
- /* XXX: bandaid until callers do refcounting */
- scsi_device_put(sdev);
return SCSI_SCAN_LUN_PRESENT;
}
- }
-
- sdev = scsi_alloc_sdev(host, channel, id, lun);
+ scsi_device_put(sdev);
+ } else
+ sdev = scsi_alloc_sdev(starget, lun, hostdata);
if (!sdev)
goto out;
- sreq = scsi_allocate_request(sdev, GFP_ATOMIC);
- if (!sreq)
- goto out_free_sdev;
- result = kmalloc(256, GFP_ATOMIC |
- (host->unchecked_isa_dma) ? __GFP_DMA : 0);
+
+ result = kmalloc(result_len, GFP_ATOMIC |
+ ((shost->unchecked_isa_dma) ? __GFP_DMA : 0));
if (!result)
- goto out_free_sreq;
+ goto out_free_sdev;
- scsi_probe_lun(sreq, result, &bflags);
- if (sreq->sr_result)
+ if (scsi_probe_lun(sdev, result, result_len, &bflags))
goto out_free_result;
/*
goto out_free_result;
}
+ /*
+ * Non-standard SCSI targets may set the PDT to 0x1f (unknown or
+ * no device type) instead of using the Peripheral Qualifier to
+ * indicate that no LUN is present. For example, USB UFI does this.
+ */
+ if (starget->pdt_1f_for_no_lun && (result[0] & 0x1f) == 0x1f) {
+ SCSI_LOG_SCAN_BUS(3, printk(KERN_INFO
+ "scsi scan: peripheral device type"
+ " of 31, no device added\n"));
+ res = SCSI_SCAN_TARGET_PRESENT;
+ goto out_free_result;
+ }
+
res = scsi_add_lun(sdev, result, &bflags);
if (res == SCSI_SCAN_LUN_PRESENT) {
if (bflags & BLIST_KEY) {
sdev->lockable = 0;
- scsi_unlock_floptical(sreq, result);
+ scsi_unlock_floptical(sdev, result);
}
if (bflagsp)
*bflagsp = bflags;
out_free_result:
kfree(result);
- out_free_sreq:
- scsi_release_request(sreq);
out_free_sdev:
if (res == SCSI_SCAN_LUN_PRESENT) {
- if (sdevp)
- *sdevp = sdev;
- } else {
- if (sdev->host->hostt->slave_destroy)
- sdev->host->hostt->slave_destroy(sdev);
- if (sdev->host->transportt->cleanup)
- sdev->host->transportt->cleanup(sdev);
- put_device(&sdev->sdev_gendev);
- }
+ if (sdevp) {
+ if (scsi_device_get(sdev) == 0) {
+ *sdevp = sdev;
+ } else {
+ __scsi_remove_device(sdev);
+ res = SCSI_SCAN_NO_RESPONSE;
+ }
+ }
+ } else
+ scsi_destroy_sdev(sdev);
out:
return res;
}
/**
* scsi_sequential_lun_scan - sequentially scan a SCSI target
- * @sdevscan: scan the host, channel, and id of this Scsi_Device
+ * @starget: pointer to target structure to scan
* @bflags: black/white list flag for LUN 0
* @lun0_res: result of scanning LUN 0
*
*
* Modifies sdevscan->lun.
**/
-static void scsi_sequential_lun_scan(struct Scsi_Host *shost, uint channel,
- uint id, int bflags, int lun0_res, int scsi_level, int rescan)
+static void scsi_sequential_lun_scan(struct scsi_target *starget,
+ int bflags, int lun0_res, int scsi_level,
+ int rescan)
{
unsigned int sparse_lun, lun, max_dev_lun;
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
SCSI_LOG_SCAN_BUS(3, printk(KERN_INFO "scsi scan: Sequential scan of"
- " host %d channel %d id %d\n", shost->host_no,
- channel, id));
+ "%s\n", starget->dev.bus_id));
max_dev_lun = min(max_scsi_luns, shost->max_lun);
/*
* sparse_lun.
*/
for (lun = 1; lun < max_dev_lun; ++lun)
- if ((scsi_probe_and_add_lun(shost, channel, id, lun,
- NULL, NULL, rescan) != SCSI_SCAN_LUN_PRESENT) &&
+ if ((scsi_probe_and_add_lun(starget, lun, NULL, NULL, rescan,
+ NULL) != SCSI_SCAN_LUN_PRESENT) &&
!sparse_lun)
return;
}
return lun;
}
+/**
+ * int_to_scsilun: reverts an int into a scsi_lun
+ * @int: integer to be reverted
+ * @scsilun: struct scsi_lun to be set.
+ *
+ * Description:
+ * Reverts the functionality of the scsilun_to_int, which packed
+ * an 8-byte lun value into an int. This routine unpacks the int
+ * back into the lun value.
+ * Note: the scsilun_to_int() routine does not truly handle all
+ * 8bytes of the lun value. This functions restores only as much
+ * as was set by the routine.
+ *
+ * Notes:
+ * Given an integer : 0x0b030a04, this function returns a
+ * scsi_lun of : struct scsi_lun of: 0a 04 0b 03 00 00 00 00
+ *
+ **/
+void int_to_scsilun(unsigned int lun, struct scsi_lun *scsilun)
+{
+ int i;
+
+ memset(scsilun->scsi_lun, 0, sizeof(scsilun->scsi_lun));
+
+ for (i = 0; i < sizeof(lun); i += 2) {
+ scsilun->scsi_lun[i] = (lun >> 8) & 0xFF;
+ scsilun->scsi_lun[i+1] = lun & 0xFF;
+ lun = lun >> 16;
+ }
+}
+EXPORT_SYMBOL(int_to_scsilun);
+
/**
* scsi_report_lun_scan - Scan using SCSI REPORT LUN results
- * @sdevscan: scan the host, channel, and id of this Scsi_Device
+ * @sdevscan: scan the host, channel, and id of this scsi_device
*
* Description:
* If @sdevscan is for a SCSI-3 or up device, send a REPORT LUN
* 0: scan completed (or no memory, so further scanning is futile)
* 1: no report lun scan, or not configured
**/
-static int scsi_report_lun_scan(struct scsi_device *sdev, int bflags,
+static int scsi_report_lun_scan(struct scsi_target *starget, int bflags,
int rescan)
{
char devname[64];
unsigned int lun;
unsigned int num_luns;
unsigned int retries;
+ int result;
struct scsi_lun *lunp, *lun_data;
- struct scsi_request *sreq;
u8 *data;
+ struct scsi_sense_hdr sshdr;
+ struct scsi_device *sdev;
+ struct Scsi_Host *shost = dev_to_shost(&starget->dev);
+ int ret = 0;
/*
* Only support SCSI-3 and up devices if BLIST_NOREPORTLUN is not set.
* Also allow SCSI-2 if BLIST_REPORTLUN2 is set and host adapter does
* support more than 8 LUNs.
*/
- if ((bflags & BLIST_NOREPORTLUN) ||
- sdev->scsi_level < SCSI_2 ||
- (sdev->scsi_level < SCSI_3 &&
- (!(bflags & BLIST_REPORTLUN2) || sdev->host->max_lun <= 8)) )
+ if (bflags & BLIST_NOREPORTLUN)
+ return 1;
+ if (starget->scsi_level < SCSI_2 &&
+ starget->scsi_level != SCSI_UNKNOWN)
+ return 1;
+ if (starget->scsi_level < SCSI_3 &&
+ (!(bflags & BLIST_REPORTLUN2) || shost->max_lun <= 8))
return 1;
if (bflags & BLIST_NOLUN)
return 0;
- sreq = scsi_allocate_request(sdev, GFP_ATOMIC);
- if (!sreq)
- goto out;
+ if (!(sdev = scsi_device_lookup_by_target(starget, 0))) {
+ sdev = scsi_alloc_sdev(starget, 0, NULL);
+ if (!sdev)
+ return 0;
+ if (scsi_device_get(sdev))
+ return 0;
+ }
sprintf(devname, "host %d channel %d id %d",
- sdev->host->host_no, sdev->channel, sdev->id);
+ shost->host_no, sdev->channel, sdev->id);
/*
* Allocate enough to hold the header (the same size as one scsi_lun)
length = (max_scsi_report_luns + 1) * sizeof(struct scsi_lun);
lun_data = kmalloc(length, GFP_ATOMIC |
(sdev->host->unchecked_isa_dma ? __GFP_DMA : 0));
- if (!lun_data)
- goto out_release_request;
+ if (!lun_data) {
+ printk(ALLOC_FAILURE_MSG, __FUNCTION__);
+ goto out;
+ }
scsi_cmd[0] = REPORT_LUNS;
scsi_cmd[10] = 0; /* reserved */
scsi_cmd[11] = 0; /* control */
- sreq->sr_cmd_len = 0;
- sreq->sr_data_direction = DMA_FROM_DEVICE;
/*
* We can get a UNIT ATTENTION, for example a power on/reset, so
SCSI_LOG_SCAN_BUS(3, printk (KERN_INFO "scsi scan: Sending"
" REPORT LUNS to %s (try %d)\n", devname,
retries));
- scsi_wait_req(sreq, scsi_cmd, lun_data, length,
- SCSI_TIMEOUT + 4*HZ, 3);
+
+ result = scsi_execute_req(sdev, scsi_cmd, DMA_FROM_DEVICE,
+ lun_data, length, &sshdr,
+ SCSI_TIMEOUT + 4 * HZ, 3);
+
SCSI_LOG_SCAN_BUS(3, printk (KERN_INFO "scsi scan: REPORT LUNS"
- " %s (try %d) result 0x%x\n", sreq->sr_result
- ? "failed" : "successful", retries,
- sreq->sr_result));
- if (sreq->sr_result == 0 ||
- sreq->sr_sense_buffer[2] != UNIT_ATTENTION)
+ " %s (try %d) result 0x%x\n", result
+ ? "failed" : "successful", retries, result));
+ if (result == 0)
break;
+ else if (scsi_sense_valid(&sshdr)) {
+ if (sshdr.sense_key != UNIT_ATTENTION)
+ break;
+ }
}
- if (sreq->sr_result) {
+ if (result) {
/*
* The device probably does not support a REPORT LUN command
*/
- kfree(lun_data);
- scsi_release_request(sreq);
- return 1;
+ ret = 1;
+ goto out_err;
}
- scsi_release_request(sreq);
/*
* Get the length from the first four bytes of lun_data.
num_luns = max_scsi_report_luns;
}
- SCSI_LOG_SCAN_BUS(3, printk (KERN_INFO "scsi scan: REPORT LUN scan of"
- " host %d channel %d id %d\n", sdev->host->host_no,
- sdev->channel, sdev->id));
+ SCSI_LOG_SCAN_BUS(3, sdev_printk (KERN_INFO, sdev,
+ "scsi scan: REPORT LUN scan\n"));
/*
* Scan the luns in lun_data. The entry at offset 0 is really
for (i = 0; i < sizeof(struct scsi_lun); i++)
printk("%02x", data[i]);
printk(" has a LUN larger than currently supported.\n");
- } else if (lun == 0) {
- /*
- * LUN 0 has already been scanned.
- */
} else if (lun > sdev->host->max_lun) {
printk(KERN_WARNING "scsi: %s lun%d has a LUN larger"
" than allowed by the host adapter\n",
} else {
int res;
- res = scsi_probe_and_add_lun(sdev->host, sdev->channel,
- sdev->id, lun, NULL, NULL, rescan);
+ res = scsi_probe_and_add_lun(starget,
+ lun, NULL, NULL, rescan, NULL);
if (res == SCSI_SCAN_NO_RESPONSE) {
/*
* Got some results, but now none, abort.
*/
- printk(KERN_ERR "scsi: Unexpected response"
- " from %s lun %d while scanning, scan"
- " aborted\n", devname, lun);
+ sdev_printk(KERN_ERR, sdev,
+ "Unexpected response"
+ " from lun %d while scanning, scan"
+ " aborted\n", lun);
break;
}
}
}
+ out_err:
kfree(lun_data);
- return 0;
-
- out_release_request:
- scsi_release_request(sreq);
out:
- /*
- * We are out of memory, don't try scanning any further.
- */
- printk(ALLOC_FAILURE_MSG, __FUNCTION__);
- return 0;
+ scsi_device_put(sdev);
+ if (sdev->sdev_state == SDEV_CREATED)
+ /*
+ * the sdev we used didn't appear in the report luns scan
+ */
+ scsi_destroy_sdev(sdev);
+ return ret;
}
-struct scsi_device *scsi_add_device(struct Scsi_Host *shost,
- uint channel, uint id, uint lun)
+struct scsi_device *__scsi_add_device(struct Scsi_Host *shost, uint channel,
+ uint id, uint lun, void *hostdata)
{
- struct scsi_device *sdev;
- int res;
+ struct scsi_device *sdev = ERR_PTR(-ENODEV);
+ struct device *parent = &shost->shost_gendev;
+ struct scsi_target *starget;
- down(&shost->scan_mutex);
- res = scsi_probe_and_add_lun(shost, channel, id, lun, NULL, &sdev, 1);
- if (res != SCSI_SCAN_LUN_PRESENT)
- sdev = ERR_PTR(-ENODEV);
- up(&shost->scan_mutex);
+ starget = scsi_alloc_target(parent, channel, id);
+ if (!starget)
+ return ERR_PTR(-ENOMEM);
+
+ get_device(&starget->dev);
+ mutex_lock(&shost->scan_mutex);
+ if (scsi_host_scan_allowed(shost))
+ scsi_probe_and_add_lun(starget, lun, NULL, &sdev, 1, hostdata);
+ mutex_unlock(&shost->scan_mutex);
+ scsi_target_reap(starget);
+ put_device(&starget->dev);
return sdev;
}
+EXPORT_SYMBOL(__scsi_add_device);
+
+int scsi_add_device(struct Scsi_Host *host, uint channel,
+ uint target, uint lun)
+{
+ struct scsi_device *sdev =
+ __scsi_add_device(host, channel, target, lun, NULL);
+ if (IS_ERR(sdev))
+ return PTR_ERR(sdev);
+
+ scsi_device_put(sdev);
+ return 0;
+}
+EXPORT_SYMBOL(scsi_add_device);
void scsi_rescan_device(struct device *dev)
{
module_put(drv->owner);
}
}
+EXPORT_SYMBOL(scsi_rescan_device);
-/**
- * scsi_scan_target - scan a target id, possibly including all LUNs on the
- * target.
- * @sdevsca: Scsi_Device handle for scanning
- * @shost: host to scan
- * @channel: channel to scan
- * @id: target id to scan
- *
- * Description:
- * Scan the target id on @shost, @channel, and @id. Scan at least LUN
- * 0, and possibly all LUNs on the target id.
- *
- * Use the pre-allocated @sdevscan as a handle for the scanning. This
- * function sets sdevscan->host, sdevscan->id and sdevscan->lun; the
- * scanning functions modify sdevscan->lun.
- *
- * First try a REPORT LUN scan, if that does not scan the target, do a
- * sequential scan of LUNs on the target id.
- **/
-static void scsi_scan_target(struct Scsi_Host *shost, unsigned int channel,
- unsigned int id, unsigned int lun, int rescan)
+static void __scsi_scan_target(struct device *parent, unsigned int channel,
+ unsigned int id, unsigned int lun, int rescan)
{
+ struct Scsi_Host *shost = dev_to_shost(parent);
int bflags = 0;
int res;
- struct scsi_device *sdev;
+ struct scsi_target *starget;
if (shost->this_id == id)
/*
*/
return;
+ starget = scsi_alloc_target(parent, channel, id);
+ if (!starget)
+ return;
+
+ get_device(&starget->dev);
if (lun != SCAN_WILD_CARD) {
/*
* Scan for a specific host/chan/id/lun.
*/
- scsi_probe_and_add_lun(shost, channel, id, lun, NULL, NULL,
- rescan);
- return;
+ scsi_probe_and_add_lun(starget, lun, NULL, NULL, rescan, NULL);
+ goto out_reap;
}
/*
* Scan LUN 0, if there is some response, scan further. Ideally, we
* would not configure LUN 0 until all LUNs are scanned.
*/
- res = scsi_probe_and_add_lun(shost, channel, id, 0, &bflags, &sdev,
- rescan);
- if (res == SCSI_SCAN_LUN_PRESENT) {
- if (scsi_report_lun_scan(sdev, bflags, rescan) != 0)
+ res = scsi_probe_and_add_lun(starget, 0, &bflags, NULL, rescan, NULL);
+ if (res == SCSI_SCAN_LUN_PRESENT || res == SCSI_SCAN_TARGET_PRESENT) {
+ if (scsi_report_lun_scan(starget, bflags, rescan) != 0)
/*
* The REPORT LUN did not scan the target,
* do a sequential scan.
*/
- scsi_sequential_lun_scan(shost, channel, id, bflags,
- res, sdev->scsi_level, rescan);
- } else if (res == SCSI_SCAN_TARGET_PRESENT) {
- /*
- * There's a target here, but lun 0 is offline so we
- * can't use the report_lun scan. Fall back to a
- * sequential lun scan with a bflags of SPARSELUN and
- * a default scsi level of SCSI_2
- */
- scsi_sequential_lun_scan(shost, channel, id, BLIST_SPARSELUN,
- SCSI_SCAN_TARGET_PRESENT, SCSI_2, rescan);
+ scsi_sequential_lun_scan(starget, bflags,
+ res, starget->scsi_level, rescan);
}
+
+ out_reap:
+ /* now determine if the target has any children at all
+ * and if not, nuke it */
+ scsi_target_reap(starget);
+
+ put_device(&starget->dev);
}
+/**
+ * scsi_scan_target - scan a target id, possibly including all LUNs on the
+ * target.
+ * @parent: host to scan
+ * @channel: channel to scan
+ * @id: target id to scan
+ * @lun: Specific LUN to scan or SCAN_WILD_CARD
+ * @rescan: passed to LUN scanning routines
+ *
+ * Description:
+ * Scan the target id on @parent, @channel, and @id. Scan at least LUN 0,
+ * and possibly all LUNs on the target id.
+ *
+ * First try a REPORT LUN scan, if that does not scan the target, do a
+ * sequential scan of LUNs on the target id.
+ **/
+void scsi_scan_target(struct device *parent, unsigned int channel,
+ unsigned int id, unsigned int lun, int rescan)
+{
+ struct Scsi_Host *shost = dev_to_shost(parent);
+
+ mutex_lock(&shost->scan_mutex);
+ if (scsi_host_scan_allowed(shost))
+ __scsi_scan_target(parent, channel, id, lun, rescan);
+ mutex_unlock(&shost->scan_mutex);
+}
+EXPORT_SYMBOL(scsi_scan_target);
+
static void scsi_scan_channel(struct Scsi_Host *shost, unsigned int channel,
unsigned int id, unsigned int lun, int rescan)
{
order_id = shost->max_id - id - 1;
else
order_id = id;
- scsi_scan_target(shost, channel, order_id, lun, rescan);
+ __scsi_scan_target(&shost->shost_gendev, channel,
+ order_id, lun, rescan);
}
else
- scsi_scan_target(shost, channel, id, lun, rescan);
+ __scsi_scan_target(&shost->shost_gendev, channel,
+ id, lun, rescan);
}
int scsi_scan_host_selected(struct Scsi_Host *shost, unsigned int channel,
unsigned int id, unsigned int lun, int rescan)
{
- SCSI_LOG_SCAN_BUS(3, printk (KERN_INFO "%s: <%u:%u:%u:%u>\n",
- __FUNCTION__, shost->host_no, channel, id, lun));
+ SCSI_LOG_SCAN_BUS(3, shost_printk (KERN_INFO, shost,
+ "%s: <%u:%u:%u>\n",
+ __FUNCTION__, channel, id, lun));
if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
((id != SCAN_WILD_CARD) && (id > shost->max_id)) ||
((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
return -EINVAL;
- down(&shost->scan_mutex);
- if (channel == SCAN_WILD_CARD)
- for (channel = 0; channel <= shost->max_channel; channel++)
+ mutex_lock(&shost->scan_mutex);
+ if (scsi_host_scan_allowed(shost)) {
+ if (channel == SCAN_WILD_CARD)
+ for (channel = 0; channel <= shost->max_channel;
+ channel++)
+ scsi_scan_channel(shost, channel, id, lun,
+ rescan);
+ else
scsi_scan_channel(shost, channel, id, lun, rescan);
- else
- scsi_scan_channel(shost, channel, id, lun, rescan);
- up(&shost->scan_mutex);
+ }
+ mutex_unlock(&shost->scan_mutex);
return 0;
}
scsi_scan_host_selected(shost, SCAN_WILD_CARD, SCAN_WILD_CARD,
SCAN_WILD_CARD, 0);
}
+EXPORT_SYMBOL(scsi_scan_host);
void scsi_forget_host(struct Scsi_Host *shost)
{
- struct scsi_device *sdev, *tmp;
+ struct scsi_device *sdev;
unsigned long flags;
- /*
- * Ok, this look a bit strange. We always look for the first device
- * on the list as scsi_remove_device removes them from it - thus we
- * also have to release the lock.
- * We don't need to get another reference to the device before
- * releasing the lock as we already own the reference from
- * scsi_register_device that's release in scsi_remove_device. And
- * after that we don't look at sdev anymore.
- */
+ restart:
spin_lock_irqsave(shost->host_lock, flags);
- list_for_each_entry_safe(sdev, tmp, &shost->__devices, siblings) {
+ list_for_each_entry(sdev, &shost->__devices, siblings) {
+ if (sdev->sdev_state == SDEV_DEL)
+ continue;
spin_unlock_irqrestore(shost->host_lock, flags);
- scsi_remove_device(sdev);
- spin_lock_irqsave(shost->host_lock, flags);
+ __scsi_remove_device(sdev);
+ goto restart;
}
spin_unlock_irqrestore(shost->host_lock, flags);
}
/*
* Function: scsi_get_host_dev()
*
- * Purpose: Create a Scsi_Device that points to the host adapter itself.
+ * Purpose: Create a scsi_device that points to the host adapter itself.
*
- * Arguments: SHpnt - Host that needs a Scsi_Device
+ * Arguments: SHpnt - Host that needs a scsi_device
*
* Lock status: None assumed.
*
- * Returns: The Scsi_Device or NULL
+ * Returns: The scsi_device or NULL
*
* Notes:
- * Attach a single Scsi_Device to the Scsi_Host - this should
+ * Attach a single scsi_device to the Scsi_Host - this should
* be made to look like a "pseudo-device" that points to the
* HA itself.
*
*/
struct scsi_device *scsi_get_host_dev(struct Scsi_Host *shost)
{
- struct scsi_device *sdev;
+ struct scsi_device *sdev = NULL;
+ struct scsi_target *starget;
- sdev = scsi_alloc_sdev(shost, 0, shost->this_id, 0);
+ mutex_lock(&shost->scan_mutex);
+ if (!scsi_host_scan_allowed(shost))
+ goto out;
+ starget = scsi_alloc_target(&shost->shost_gendev, 0, shost->this_id);
+ if (!starget)
+ goto out;
+
+ sdev = scsi_alloc_sdev(starget, 0, NULL);
if (sdev) {
+ sdev->sdev_gendev.parent = get_device(&starget->dev);
sdev->borken = 0;
}
+ put_device(&starget->dev);
+ out:
+ mutex_unlock(&shost->scan_mutex);
return sdev;
}
+EXPORT_SYMBOL(scsi_get_host_dev);
/*
* Function: scsi_free_host_dev()
*
* Purpose: Free a scsi_device that points to the host adapter itself.
*
- * Arguments: SHpnt - Host that needs a Scsi_Device
+ * Arguments: SHpnt - Host that needs a scsi_device
*
* Lock status: None assumed.
*
{
BUG_ON(sdev->id != sdev->host->this_id);
- if (sdev->host->hostt->slave_destroy)
- sdev->host->hostt->slave_destroy(sdev);
- if (sdev->host->transportt->cleanup)
- sdev->host->transportt->cleanup(sdev);
- put_device(&sdev->sdev_gendev);
+ scsi_destroy_sdev(sdev);
}
+EXPORT_SYMBOL(scsi_free_host_dev);
+
git://git.onelab.eu / linux-2.6.git / blobdiff