X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=drivers%2Fscsi%2Fscsi_scan.c;h=c44783801402083b7dbd610df35f8990eb090ef9;hb=8e498751f2f36074ffa6fc7f0a9ec6e055b350e6;hp=20df7fe4f48fe05a694a780a2e2b218235841da9;hpb=10f4b89a0f0586a67f57efb2f5d12fffbb371490;p=safe%2Fjmp%2Flinux-2.6 diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c index 20df7fe..c447838 100644 --- a/drivers/scsi/scsi_scan.c +++ b/drivers/scsi/scsi_scan.c @@ -32,6 +32,7 @@ #include #include #include +#include #include #include @@ -114,12 +115,12 @@ MODULE_PARM_DESC(max_report_luns, "REPORT LUNS maximum number of LUNS received (should be" " between 1 and 16384)"); -static unsigned int scsi_inq_timeout = SCSI_TIMEOUT/HZ+3; +static unsigned int scsi_inq_timeout = SCSI_TIMEOUT/HZ + 18; module_param_named(inq_timeout, scsi_inq_timeout, uint, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(inq_timeout, "Timeout (in seconds) waiting for devices to answer INQUIRY." - " Default is 5. Some non-compliant devices need more."); + " Default is 20. Some devices may need more; most need less."); /* This lock protects only this list */ static DEFINE_SPINLOCK(async_scan_lock); @@ -216,11 +217,14 @@ static void scsi_unlock_floptical(struct scsi_device *sdev, scsi_cmd[4] = 0x2a; /* size */ scsi_cmd[5] = 0; scsi_execute_req(sdev, scsi_cmd, DMA_FROM_DEVICE, result, 0x2a, NULL, - SCSI_TIMEOUT, 3); + SCSI_TIMEOUT, 3, NULL); } /** * scsi_alloc_sdev - allocate and setup a scsi_Device + * @starget: which target to allocate a &scsi_device for + * @lun: which lun + * @hostdata: usually NULL and set by ->slave_alloc instead * * Description: * Allocate, initialize for io, and return a pointer to a scsi_Device. @@ -236,6 +240,7 @@ static struct scsi_device *scsi_alloc_sdev(struct scsi_target *starget, struct scsi_device *sdev; int display_failure_msg = 1, ret; struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + extern void scsi_evt_thread(struct work_struct *work); sdev = kzalloc(sizeof(*sdev) + shost->transportt->device_size, GFP_ATOMIC); @@ -254,7 +259,9 @@ static struct scsi_device *scsi_alloc_sdev(struct scsi_target *starget, INIT_LIST_HEAD(&sdev->same_target_siblings); INIT_LIST_HEAD(&sdev->cmd_list); INIT_LIST_HEAD(&sdev->starved_entry); + INIT_LIST_HEAD(&sdev->event_list); spin_lock_init(&sdev->list_lock); + INIT_WORK(&sdev->event_work, scsi_evt_thread); sdev->sdev_gendev.parent = get_device(&starget->dev); sdev->sdev_target = starget; @@ -308,14 +315,30 @@ static struct scsi_device *scsi_alloc_sdev(struct scsi_target *starget, return sdev; out_device_destroy: + scsi_device_set_state(sdev, SDEV_DEL); transport_destroy_device(&sdev->sdev_gendev); put_device(&sdev->sdev_gendev); out: if (display_failure_msg) - printk(ALLOC_FAILURE_MSG, __FUNCTION__); + printk(ALLOC_FAILURE_MSG, __func__); return NULL; } +static void scsi_target_destroy(struct scsi_target *starget) +{ + struct device *dev = &starget->dev; + struct Scsi_Host *shost = dev_to_shost(dev->parent); + unsigned long flags; + + transport_destroy_device(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(dev); +} + static void scsi_target_dev_release(struct device *dev) { struct device *parent = dev->parent; @@ -325,9 +348,14 @@ static void scsi_target_dev_release(struct device *dev) put_device(parent); } +static struct device_type scsi_target_type = { + .name = "scsi_target", + .release = scsi_target_dev_release, +}; + int scsi_is_target_device(const struct device *dev) { - return dev->release == scsi_target_dev_release; + return dev->type == &scsi_target_type; } EXPORT_SYMBOL(scsi_is_target_device); @@ -378,22 +406,26 @@ static struct scsi_target *scsi_alloc_target(struct device *parent, starget = kzalloc(size, GFP_KERNEL); if (!starget) { - printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__); + printk(KERN_ERR "%s: allocation failure\n", __func__); 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); + dev_set_name(dev, "target%d:%d:%d", shost->host_no, channel, id); +#ifndef CONFIG_SYSFS_DEPRECATED + dev->bus = &scsi_bus_type; +#endif + dev->type = &scsi_target_type; starget->id = id; starget->channel = channel; + starget->can_queue = 0; INIT_LIST_HEAD(&starget->siblings); INIT_LIST_HEAD(&starget->devices); - starget->state = STARGET_RUNNING; + starget->state = STARGET_CREATED; starget->scsi_level = SCSI_2; + starget->max_target_blocked = SCSI_DEFAULT_TARGET_BLOCKED; retry: spin_lock_irqsave(shost->host_lock, flags); @@ -405,18 +437,6 @@ static struct scsi_target *scsi_alloc_target(struct device *parent, spin_unlock_irqrestore(shost->host_lock, flags); /* 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); @@ -424,9 +444,7 @@ static struct scsi_target *scsi_alloc_target(struct device *parent, 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); + scsi_target_destroy(starget); return NULL; } } @@ -453,23 +471,14 @@ static void scsi_target_reap_usercontext(struct work_struct *work) { struct scsi_target *starget = container_of(work, struct scsi_target, ew.work); - 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_destroy(starget); } /** * 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 @@ -480,21 +489,25 @@ void scsi_target_reap(struct scsi_target *starget) { struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); unsigned long flags; + enum scsi_target_state state; + int empty; spin_lock_irqsave(shost->host_lock, flags); + state = starget->state; + empty = --starget->reap_ref == 0 && + list_empty(&starget->devices) ? 1 : 0; + spin_unlock_irqrestore(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->ew); + if (!empty) return; - } - spin_unlock_irqrestore(shost->host_lock, flags); - - return; + BUG_ON(state == STARGET_DEL); + starget->state = STARGET_DEL; + if (state == STARGET_CREATED) + scsi_target_destroy(starget); + else + execute_in_process_context(scsi_target_reap_usercontext, + &starget->ew); } /** @@ -562,6 +575,8 @@ static int scsi_probe_lun(struct scsi_device *sdev, unsigned char *inq_result, /* Each pass gets up to three chances to ignore Unit Attention */ for (count = 0; count < 3; ++count) { + int resid; + memset(scsi_cmd, 0, 6); scsi_cmd[0] = INQUIRY; scsi_cmd[4] = (unsigned char) try_inquiry_len; @@ -570,7 +585,8 @@ static int scsi_probe_lun(struct scsi_device *sdev, unsigned char *inq_result, result = scsi_execute_req(sdev, scsi_cmd, DMA_FROM_DEVICE, inq_result, try_inquiry_len, &sshdr, - HZ / 2 + HZ * scsi_inq_timeout, 3); + HZ / 2 + HZ * scsi_inq_timeout, 3, + &resid); SCSI_LOG_SCAN_BUS(3, printk(KERN_INFO "scsi scan: INQUIRY %s " "with code 0x%x\n", @@ -591,6 +607,14 @@ static int scsi_probe_lun(struct scsi_device *sdev, unsigned char *inq_result, (sshdr.ascq == 0)) continue; } + } else { + /* + * if nothing was transferred, we try + * again. It's a workaround for some USB + * devices. + */ + if (resid == try_inquiry_len) + continue; } break; } @@ -720,6 +744,8 @@ static int scsi_probe_lun(struct scsi_device *sdev, unsigned char *inq_result, static int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result, int *bflags, int async) { + int ret; + /* * XXX do not save the inquiry, since it can change underneath us, * save just vendor/model/rev. @@ -770,6 +796,7 @@ static int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result, case TYPE_ENCLOSURE: case TYPE_COMM: case TYPE_RAID: + case TYPE_OSD: sdev->writeable = 1; break; case TYPE_ROM: @@ -860,7 +887,7 @@ static int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result, sdev->no_start_on_add = 1; if (*bflags & BLIST_SINGLELUN) - sdev->single_lun = 1; + scsi_target(sdev)->single_lun = 1; sdev->use_10_for_rw = 1; @@ -875,7 +902,17 @@ static int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result, /* set the device running here so that slave configure * may do I/O */ - scsi_device_set_state(sdev, SDEV_RUNNING); + ret = scsi_device_set_state(sdev, SDEV_RUNNING); + if (ret) { + ret = scsi_device_set_state(sdev, SDEV_BLOCK); + + if (ret) { + sdev_printk(KERN_ERR, sdev, + "in wrong state %s to complete scan\n", + scsi_device_state_name(sdev->sdev_state)); + return SCSI_SCAN_NO_RESPONSE; + } + } if (*bflags & BLIST_MS_192_BYTES_FOR_3F) sdev->use_192_bytes_for_3f = 1; @@ -889,7 +926,7 @@ static int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result, transport_configure_device(&sdev->sdev_gendev); if (sdev->host->hostt->slave_configure) { - int ret = sdev->host->hostt->slave_configure(sdev); + ret = sdev->host->hostt->slave_configure(sdev); if (ret) { /* * if LLDD reports slave not present, don't clutter @@ -925,8 +962,7 @@ static inline void scsi_destroy_sdev(struct scsi_device *sdev) #ifdef CONFIG_SCSI_LOGGING /** - * scsi_inq_str - print INQUIRY data from min to max index, - * strip trailing whitespace + * scsi_inq_str - print INQUIRY data from min to max index, strip trailing whitespace * @buf: Output buffer with at least end-first+1 bytes of space * @inq: Inquiry buffer (input) * @first: Offset of string into inq @@ -954,9 +990,10 @@ static unsigned char *scsi_inq_str(unsigned char *buf, unsigned char *inq, * scsi_probe_and_add_lun - probe a LUN, if a LUN is found add it * @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 + * @sdevp: probe the LUN corresponding to this scsi_device + * @rescan: if nonzero skip some code only needed on first scan + * @hostdata: passed to scsi_alloc_sdev() * * Description: * Call scsi_probe_lun, if a LUN with an attached device is found, @@ -984,10 +1021,10 @@ static int scsi_probe_and_add_lun(struct scsi_target *starget, */ sdev = scsi_device_lookup_by_target(starget, lun); if (sdev) { - if (rescan || sdev->sdev_state != SDEV_CREATED) { + if (rescan || !scsi_device_created(sdev)) { SCSI_LOG_SCAN_BUS(3, printk(KERN_INFO "scsi scan: device exists on %s\n", - sdev->sdev_gendev.bus_id)); + dev_name(&sdev->sdev_gendev))); if (sdevp) *sdevp = sdev; else @@ -1043,8 +1080,9 @@ static int scsi_probe_and_add_lun(struct scsi_target *starget, scsi_inq_str(vend, result, 8, 16), scsi_inq_str(mod, result, 16, 32)); }); + } - + res = SCSI_SCAN_TARGET_PRESENT; goto out_free_result; } @@ -1069,7 +1107,8 @@ static int scsi_probe_and_add_lun(struct scsi_target *starget, * PDT=1Fh none (no FDD connected to the requested logical unit) */ if (((result[0] >> 5) == 1 || starget->pdt_1f_for_no_lun) && - (result[0] & 0x1f) == 0x1f) { + (result[0] & 0x1f) == 0x1f && + !scsi_is_wlun(lun)) { SCSI_LOG_SCAN_BUS(3, printk(KERN_INFO "scsi scan: peripheral device type" " of 31, no device added\n")); @@ -1107,6 +1146,8 @@ static int scsi_probe_and_add_lun(struct scsi_target *starget, * scsi_sequential_lun_scan - sequentially scan a SCSI target * @starget: pointer to target structure to scan * @bflags: black/white list flag for LUN 0 + * @scsi_level: Which version of the standard does this device adhere to + * @rescan: passed to scsi_probe_add_lun() * * Description: * Generally, scan from LUN 1 (LUN 0 is assumed to already have been @@ -1122,7 +1163,7 @@ static void scsi_sequential_lun_scan(struct scsi_target *starget, struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); SCSI_LOG_SCAN_BUS(3, printk(KERN_INFO "scsi scan: Sequential scan of" - "%s\n", starget->dev.bus_id)); + "%s\n", dev_name(&starget->dev))); max_dev_lun = min(max_scsi_luns, shost->max_lun); /* @@ -1217,7 +1258,7 @@ EXPORT_SYMBOL(scsilun_to_int); /** * int_to_scsilun: reverts an int into a scsi_lun - * @int: integer to be reverted + * @lun: integer to be reverted * @scsilun: struct scsi_lun to be set. * * Description: @@ -1249,18 +1290,22 @@ 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 + * @starget: which target + * @bflags: Zero or a mix of BLIST_NOLUN, BLIST_REPORTLUN2, or BLIST_NOREPORTLUN + * @rescan: nonzero if we can skip code only needed on first scan * * Description: - * If @sdevscan is for a SCSI-3 or up device, send a REPORT LUN - * command, and scan the resulting list of LUNs by calling - * scsi_probe_and_add_lun. + * Fast scanning for modern (SCSI-3) devices by sending a REPORT LUN command. + * Scan the resulting list of LUNs by calling scsi_probe_and_add_lun. * - * Modifies sdevscan->lun. + * If BLINK_REPORTLUN2 is set, scan a target that supports more than 8 + * LUNs even if it's older than SCSI-3. + * If BLIST_NOREPORTLUN is set, return 1 always. + * If BLIST_NOLUN is set, return 0 always. * * Return: * 0: scan completed (or no memory, so further scanning is futile) - * 1: no report lun scan, or not configured + * 1: could not scan with REPORT LUN **/ static int scsi_report_lun_scan(struct scsi_target *starget, int bflags, int rescan) @@ -1320,7 +1365,7 @@ static int scsi_report_lun_scan(struct scsi_target *starget, int bflags, lun_data = kmalloc(length, GFP_ATOMIC | (sdev->host->unchecked_isa_dma ? __GFP_DMA : 0)); if (!lun_data) { - printk(ALLOC_FAILURE_MSG, __FUNCTION__); + printk(ALLOC_FAILURE_MSG, __func__); goto out; } @@ -1359,7 +1404,7 @@ static int scsi_report_lun_scan(struct scsi_target *starget, int bflags, result = scsi_execute_req(sdev, scsi_cmd, DMA_FROM_DEVICE, lun_data, length, &sshdr, - SCSI_TIMEOUT + 4 * HZ, 3); + SCSI_TIMEOUT + 4 * HZ, 3, NULL); SCSI_LOG_SCAN_BUS(3, printk (KERN_INFO "scsi scan: REPORT LUNS" " %s (try %d) result 0x%x\n", result @@ -1449,7 +1494,7 @@ static int scsi_report_lun_scan(struct scsi_target *starget, int bflags, kfree(lun_data); out: scsi_device_put(sdev); - if (sdev->sdev_state == SDEV_CREATED) + if (scsi_device_created(sdev)) /* * the sdev we used didn't appear in the report luns scan */ @@ -1564,8 +1609,7 @@ static void __scsi_scan_target(struct device *parent, unsigned int channel, } /** - * scsi_scan_target - scan a target id, possibly including all LUNs on the - * target. + * 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 @@ -1633,7 +1677,7 @@ int scsi_scan_host_selected(struct Scsi_Host *shost, unsigned int channel, { SCSI_LOG_SCAN_BUS(3, shost_printk (KERN_INFO, shost, "%s: <%u:%u:%u>\n", - __FUNCTION__, channel, id, lun)); + __func__, channel, id, lun)); if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || @@ -1687,7 +1731,7 @@ static struct async_scan_data *scsi_prep_async_scan(struct Scsi_Host *shost) return NULL; if (shost->async_scan) { - printk("%s called twice for host %d", __FUNCTION__, + printk("%s called twice for host %d", __func__, shost->host_no); dump_stack(); return NULL; @@ -1741,9 +1785,10 @@ static void scsi_finish_async_scan(struct async_scan_data *data) mutex_lock(&shost->scan_mutex); if (!shost->async_scan) { - printk("%s called twice for host %d", __FUNCTION__, + printk("%s called twice for host %d", __func__, shost->host_no); dump_stack(); + mutex_unlock(&shost->scan_mutex); return; } @@ -1799,6 +1844,7 @@ static int do_scan_async(void *_data) **/ void scsi_scan_host(struct Scsi_Host *shost) { + struct task_struct *p; struct async_scan_data *data; if (strncmp(scsi_scan_type, "none", 4) == 0) @@ -1810,7 +1856,9 @@ void scsi_scan_host(struct Scsi_Host *shost) return; } - kthread_run(do_scan_async, data, "scsi_scan_%d", shost->host_no); + p = kthread_run(do_scan_async, data, "scsi_scan_%d", shost->host_no); + if (IS_ERR(p)) + do_scan_async(data); } EXPORT_SYMBOL(scsi_scan_host);