diff options
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/cciss_scsi.c | 157 |
1 files changed, 118 insertions, 39 deletions
diff --git a/drivers/block/cciss_scsi.c b/drivers/block/cciss_scsi.c index e4bf9a11ca0d..c673ff14126a 100644 --- a/drivers/block/cciss_scsi.c +++ b/drivers/block/cciss_scsi.c @@ -358,10 +358,15 @@ find_bus_target_lun(int ctlr, int *bus, int *target, int *lun) } return (!found); } +struct scsi2map { + char scsi3addr[8]; + int bus, target, lun; +}; static int cciss_scsi_add_entry(int ctlr, int hostno, - unsigned char *scsi3addr, int devtype) + unsigned char *scsi3addr, int devtype, + struct scsi2map *added, int *nadded) { /* assumes hba[ctlr]->scsi_ctlr->lock is held */ int n = ccissscsi[ctlr].ndevices; @@ -375,6 +380,12 @@ cciss_scsi_add_entry(int ctlr, int hostno, sd = &ccissscsi[ctlr].dev[n]; if (find_bus_target_lun(ctlr, &sd->bus, &sd->target, &sd->lun) != 0) return -1; + + added[*nadded].bus = sd->bus; + added[*nadded].target = sd->target; + added[*nadded].lun = sd->lun; + (*nadded)++; + memcpy(&sd->scsi3addr[0], scsi3addr, 8); sd->devtype = devtype; ccissscsi[ctlr].ndevices++; @@ -390,7 +401,8 @@ cciss_scsi_add_entry(int ctlr, int hostno, } static void -cciss_scsi_remove_entry(int ctlr, int hostno, int entry) +cciss_scsi_remove_entry(int ctlr, int hostno, int entry, + struct scsi2map *removed, int *nremoved) { /* assumes hba[ctlr]->scsi_ctlr->lock is held */ int i; @@ -398,6 +410,10 @@ cciss_scsi_remove_entry(int ctlr, int hostno, int entry) if (entry < 0 || entry >= CCISS_MAX_SCSI_DEVS_PER_HBA) return; sd = ccissscsi[ctlr].dev[entry]; + removed[*nremoved].bus = sd.bus; + removed[*nremoved].target = sd.target; + removed[*nremoved].lun = sd.lun; + (*nremoved)++; for (i=entry;i<ccissscsi[ctlr].ndevices-1;i++) ccissscsi[ctlr].dev[i] = ccissscsi[ctlr].dev[i+1]; ccissscsi[ctlr].ndevices--; @@ -417,6 +433,26 @@ cciss_scsi_remove_entry(int ctlr, int hostno, int entry) (a)[1] == (b)[1] && \ (a)[0] == (b)[0]) +static void fixup_botched_add(int ctlr, char *scsi3addr) +{ + /* called when scsi_add_device fails in order to re-adjust */ + /* ccissscsi[] to match the mid layer's view. */ + unsigned long flags; + int i, j; + CPQ_TAPE_LOCK(ctlr, flags); + for (i = 0; i < ccissscsi[ctlr].ndevices; i++) { + if (memcmp(scsi3addr, + ccissscsi[ctlr].dev[i].scsi3addr, 8) == 0) { + for (j = i; j < ccissscsi[ctlr].ndevices-1; j++) + ccissscsi[ctlr].dev[j] = + ccissscsi[ctlr].dev[j+1]; + ccissscsi[ctlr].ndevices--; + break; + } + } + CPQ_TAPE_UNLOCK(ctlr, flags); +} + static int adjust_cciss_scsi_table(int ctlr, int hostno, struct cciss_scsi_dev_t sd[], int nsds) @@ -429,13 +465,33 @@ adjust_cciss_scsi_table(int ctlr, int hostno, int i,j, found, changes=0; struct cciss_scsi_dev_t *csd; unsigned long flags; + struct scsi2map *added, *removed; + int nadded, nremoved; + struct Scsi_Host *sh = NULL; + + added = kzalloc(sizeof(*added) * CCISS_MAX_SCSI_DEVS_PER_HBA, + GFP_KERNEL); + removed = kzalloc(sizeof(*removed) * CCISS_MAX_SCSI_DEVS_PER_HBA, + GFP_KERNEL); + + if (!added || !removed) { + printk(KERN_WARNING "cciss%d: Out of memory in " + "adjust_cciss_scsi_table\n", ctlr); + goto free_and_out; + } CPQ_TAPE_LOCK(ctlr, flags); + if (hostno != -1) /* if it's not the first time... */ + sh = ((struct cciss_scsi_adapter_data_t *) + hba[ctlr]->scsi_ctlr)->scsi_host; + /* find any devices in ccissscsi[] that are not in sd[] and remove them from ccissscsi[] */ i = 0; + nremoved = 0; + nadded = 0; while(i<ccissscsi[ctlr].ndevices) { csd = &ccissscsi[ctlr].dev[i]; found=0; @@ -455,8 +511,9 @@ adjust_cciss_scsi_table(int ctlr, int hostno, /* printk("cciss%d: %s device c%db%dt%dl%d removed.\n", ctlr, scsi_device_type(csd->devtype), hostno, csd->bus, csd->target, csd->lun); */ - cciss_scsi_remove_entry(ctlr, hostno, i); - /* note, i not incremented */ + cciss_scsi_remove_entry(ctlr, hostno, i, + removed, &nremoved); + /* remove ^^^, hence i not incremented */ } else if (found == 1) { /* device is different kind */ changes++; @@ -464,8 +521,15 @@ adjust_cciss_scsi_table(int ctlr, int hostno, "(device type now %s).\n", ctlr, hostno, csd->bus, csd->target, csd->lun, scsi_device_type(csd->devtype)); + cciss_scsi_remove_entry(ctlr, hostno, i, + removed, &nremoved); + /* remove ^^^, hence i not incremented */ + if (cciss_scsi_add_entry(ctlr, hostno, + &sd[j].scsi3addr[0], sd[j].devtype, + added, &nadded) != 0) + /* we just removed one, so add can't fail. */ + BUG(); csd->devtype = sd[j].devtype; - i++; /* so just move along. */ } else /* device is same as it ever was, */ i++; /* so just move along. */ } @@ -489,7 +553,9 @@ adjust_cciss_scsi_table(int ctlr, int hostno, if (!found) { changes++; if (cciss_scsi_add_entry(ctlr, hostno, - &sd[i].scsi3addr[0], sd[i].devtype) != 0) + + &sd[i].scsi3addr[0], sd[i].devtype, + added, &nadded) != 0) break; } else if (found == 1) { /* should never happen... */ @@ -501,9 +567,50 @@ adjust_cciss_scsi_table(int ctlr, int hostno, } CPQ_TAPE_UNLOCK(ctlr, flags); - if (!changes) - printk("cciss%d: No device changes detected.\n", ctlr); + /* Don't notify scsi mid layer of any changes the first time through */ + /* (or if there are no changes) scsi_scan_host will do it later the */ + /* first time through. */ + if (hostno == -1 || !changes) + goto free_and_out; + + /* Notify scsi mid layer of any removed devices */ + for (i = 0; i < nremoved; i++) { + struct scsi_device *sdev = + scsi_device_lookup(sh, removed[i].bus, + removed[i].target, removed[i].lun); + if (sdev != NULL) { + scsi_remove_device(sdev); + scsi_device_put(sdev); + } else { + /* We don't expect to get here. */ + /* future cmds to this device will get selection */ + /* timeout as if the device was gone. */ + printk(KERN_WARNING "cciss%d: didn't find " + "c%db%dt%dl%d\n for removal.", + ctlr, hostno, removed[i].bus, + removed[i].target, removed[i].lun); + } + } + + /* Notify scsi mid layer of any added devices */ + for (i = 0; i < nadded; i++) { + int rc; + rc = scsi_add_device(sh, added[i].bus, + added[i].target, added[i].lun); + if (rc == 0) + continue; + printk(KERN_WARNING "cciss%d: scsi_add_device " + "c%db%dt%dl%d failed, device not added.\n", + ctlr, hostno, + added[i].bus, added[i].target, added[i].lun); + /* now we have to remove it from ccissscsi, */ + /* since it didn't get added to scsi mid layer */ + fixup_botched_add(ctlr, added[i].scsi3addr); + } +free_and_out: + kfree(added); + kfree(removed); return 0; } @@ -1355,32 +1462,6 @@ cciss_unregister_scsi(int ctlr) } static int -cciss_register_scsi(int ctlr) -{ - unsigned long flags; - - CPQ_TAPE_LOCK(ctlr, flags); - - /* Since this is really a block driver, the SCSI core may not be - initialized at init time, in which case, calling scsi_register_host - would hang. Instead, we do it later, via /proc filesystem - and rc scripts, when we know SCSI core is good to go. */ - - /* Only register if SCSI devices are detected. */ - if (ccissscsi[ctlr].ndevices != 0) { - ((struct cciss_scsi_adapter_data_t *) - hba[ctlr]->scsi_ctlr)->registered = 1; - CPQ_TAPE_UNLOCK(ctlr, flags); - return cciss_scsi_detect(ctlr); - } - CPQ_TAPE_UNLOCK(ctlr, flags); - printk(KERN_INFO - "cciss%d: No appropriate SCSI device detected, " - "SCSI subsystem not engaged.\n", ctlr); - return 0; -} - -static int cciss_engage_scsi(int ctlr) { struct cciss_scsi_adapter_data_t *sa; @@ -1391,15 +1472,15 @@ cciss_engage_scsi(int ctlr) sa = (struct cciss_scsi_adapter_data_t *) hba[ctlr]->scsi_ctlr; stk = &sa->cmd_stack; - if (((struct cciss_scsi_adapter_data_t *) - hba[ctlr]->scsi_ctlr)->registered) { + if (sa->registered) { printk("cciss%d: SCSI subsystem already engaged.\n", ctlr); spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); return ENXIO; } + sa->registered = 1; spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); cciss_update_non_disk_devices(ctlr, -1); - cciss_register_scsi(ctlr); + cciss_scsi_detect(ctlr); return 0; } @@ -1493,7 +1574,5 @@ static int cciss_eh_abort_handler(struct scsi_cmnd *scsicmd) /* If no tape support, then these become defined out of existence */ #define cciss_scsi_setup(cntl_num) -#define cciss_unregister_scsi(ctlr) -#define cciss_register_scsi(ctlr) #endif /* CONFIG_CISS_SCSI_TAPE */ |