diff options
Diffstat (limited to 'drivers/scsi/device_handler')
-rw-r--r-- | drivers/scsi/device_handler/scsi_dh.c | 62 | ||||
-rw-r--r-- | drivers/scsi/device_handler/scsi_dh_alua.c | 109 | ||||
-rw-r--r-- | drivers/scsi/device_handler/scsi_dh_emc.c | 1 | ||||
-rw-r--r-- | drivers/scsi/device_handler/scsi_dh_hp_sw.c | 1 | ||||
-rw-r--r-- | drivers/scsi/device_handler/scsi_dh_rdac.c | 91 |
5 files changed, 131 insertions, 133 deletions
diff --git a/drivers/scsi/device_handler/scsi_dh.c b/drivers/scsi/device_handler/scsi_dh.c index d973325..23149b9 100644 --- a/drivers/scsi/device_handler/scsi_dh.c +++ b/drivers/scsi/device_handler/scsi_dh.c @@ -22,6 +22,7 @@ */ #include <linux/slab.h> +#include <linux/module.h> #include <scsi/scsi_dh.h> #include "../scsi_priv.h" @@ -60,6 +61,46 @@ static struct scsi_device_handler *get_device_handler_by_idx(int idx) } /* + * device_handler_match_function - Match a device handler to a device + * @sdev - SCSI device to be tested + * + * Tests @sdev against the match function of all registered device_handler. + * Returns the found device handler or NULL if not found. + */ +static struct scsi_device_handler * +device_handler_match_function(struct scsi_device *sdev) +{ + struct scsi_device_handler *tmp_dh, *found_dh = NULL; + + spin_lock(&list_lock); + list_for_each_entry(tmp_dh, &scsi_dh_list, list) { + if (tmp_dh->match && tmp_dh->match(sdev)) { + found_dh = tmp_dh; + break; + } + } + spin_unlock(&list_lock); + return found_dh; +} + +/* + * device_handler_match_devlist - Match a device handler to a device + * @sdev - SCSI device to be tested + * + * Tests @sdev against all device_handler registered in the devlist. + * Returns the found device handler or NULL if not found. + */ +static struct scsi_device_handler * +device_handler_match_devlist(struct scsi_device *sdev) +{ + int idx; + + idx = scsi_get_device_flags_keyed(sdev, sdev->vendor, sdev->model, + SCSI_DEVINFO_DH); + return get_device_handler_by_idx(idx); +} + +/* * device_handler_match - Attach a device handler to a device * @scsi_dh - The device handler to match against or NULL * @sdev - SCSI device to be tested against @scsi_dh @@ -72,12 +113,11 @@ static struct scsi_device_handler * device_handler_match(struct scsi_device_handler *scsi_dh, struct scsi_device *sdev) { - struct scsi_device_handler *found_dh = NULL; - int idx; + struct scsi_device_handler *found_dh; - idx = scsi_get_device_flags_keyed(sdev, sdev->vendor, sdev->model, - SCSI_DEVINFO_DH); - found_dh = get_device_handler_by_idx(idx); + found_dh = device_handler_match_function(sdev); + if (!found_dh) + found_dh = device_handler_match_devlist(sdev); if (scsi_dh && found_dh != scsi_dh) found_dh = NULL; @@ -151,6 +191,10 @@ store_dh_state(struct device *dev, struct device_attribute *attr, struct scsi_device_handler *scsi_dh; int err = -EINVAL; + if (sdev->sdev_state == SDEV_CANCEL || + sdev->sdev_state == SDEV_DEL) + return -ENODEV; + if (!sdev->scsi_dh_data) { /* * Attach to a device handler @@ -327,7 +371,7 @@ int scsi_register_device_handler(struct scsi_device_handler *scsi_dh) list_add(&scsi_dh->list, &scsi_dh_list); spin_unlock(&list_lock); - for (i = 0; scsi_dh->devlist[i].vendor; i++) { + for (i = 0; scsi_dh->devlist && scsi_dh->devlist[i].vendor; i++) { scsi_dev_info_list_add_keyed(0, scsi_dh->devlist[i].vendor, scsi_dh->devlist[i].model, @@ -360,7 +404,7 @@ int scsi_unregister_device_handler(struct scsi_device_handler *scsi_dh) bus_for_each_dev(&scsi_bus_type, NULL, scsi_dh, scsi_dh_notifier_remove); - for (i = 0; scsi_dh->devlist[i].vendor; i++) { + for (i = 0; scsi_dh->devlist && scsi_dh->devlist[i].vendor; i++) { scsi_dev_info_list_del_keyed(scsi_dh->devlist[i].vendor, scsi_dh->devlist[i].model, SCSI_DEVINFO_DH); @@ -476,7 +520,7 @@ int scsi_dh_handler_exist(const char *name) EXPORT_SYMBOL_GPL(scsi_dh_handler_exist); /* - * scsi_dh_handler_attach - Attach device handler + * scsi_dh_attach - Attach device handler * @sdev - sdev the handler should be attached to * @name - name of the handler to attach */ @@ -506,7 +550,7 @@ int scsi_dh_attach(struct request_queue *q, const char *name) EXPORT_SYMBOL_GPL(scsi_dh_attach); /* - * scsi_dh_handler_detach - Detach device handler + * scsi_dh_detach - Detach device handler * @sdev - sdev the handler should be detached from * * This function will detach the device handler only diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c index 5391e6a..e5a4423 100644 --- a/drivers/scsi/device_handler/scsi_dh_alua.c +++ b/drivers/scsi/device_handler/scsi_dh_alua.c @@ -21,6 +21,7 @@ */ #include <linux/slab.h> #include <linux/delay.h> +#include <linux/module.h> #include <scsi/scsi.h> #include <scsi/scsi_eh.h> #include <scsi/scsi_dh.h> @@ -128,43 +129,6 @@ static struct request *get_alua_req(struct scsi_device *sdev, } /* - * submit_std_inquiry - Issue a standard INQUIRY command - * @sdev: sdev the command should be send to - */ -static int submit_std_inquiry(struct scsi_device *sdev, struct alua_dh_data *h) -{ - struct request *rq; - int err = SCSI_DH_RES_TEMP_UNAVAIL; - - rq = get_alua_req(sdev, h->inq, ALUA_INQUIRY_SIZE, READ); - if (!rq) - goto done; - - /* Prepare the command. */ - rq->cmd[0] = INQUIRY; - rq->cmd[1] = 0; - rq->cmd[2] = 0; - rq->cmd[4] = ALUA_INQUIRY_SIZE; - rq->cmd_len = COMMAND_SIZE(INQUIRY); - - rq->sense = h->sense; - memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE); - rq->sense_len = h->senselen = 0; - - err = blk_execute_rq(rq->q, NULL, rq, 1); - if (err == -EIO) { - sdev_printk(KERN_INFO, sdev, - "%s: std inquiry failed with %x\n", - ALUA_DH_NAME, rq->errors); - h->senselen = rq->sense_len; - err = SCSI_DH_IO; - } - blk_put_request(rq); -done: - return err; -} - -/* * submit_vpd_inquiry - Issue an INQUIRY VPD page 0x83 command * @sdev: sdev the command should be sent to */ @@ -338,23 +302,17 @@ static unsigned submit_stpg(struct alua_dh_data *h) } /* - * alua_std_inquiry - Evaluate standard INQUIRY command + * alua_check_tpgs - Evaluate TPGS setting * @sdev: device to be checked * - * Just extract the TPGS setting to find out if ALUA + * Examine the TPGS setting of the sdev to find out if ALUA * is supported. */ -static int alua_std_inquiry(struct scsi_device *sdev, struct alua_dh_data *h) +static int alua_check_tpgs(struct scsi_device *sdev, struct alua_dh_data *h) { - int err; - - err = submit_std_inquiry(sdev, h); - - if (err != SCSI_DH_OK) - return err; + int err = SCSI_DH_OK; - /* Check TPGS setting */ - h->tpgs = (h->inq[5] >> 4) & 0x3; + h->tpgs = scsi_device_tpgs(sdev); switch (h->tpgs) { case TPGS_MODE_EXPLICIT|TPGS_MODE_IMPLICIT: sdev_printk(KERN_INFO, sdev, @@ -508,27 +466,28 @@ static int alua_check_sense(struct scsi_device *sdev, * Power On, Reset, or Bus Device Reset, just retry. */ return ADD_TO_MLQUEUE; - if (sense_hdr->asc == 0x2a && sense_hdr->ascq == 0x06) { + if (sense_hdr->asc == 0x2a && sense_hdr->ascq == 0x06) /* * ALUA state changed */ return ADD_TO_MLQUEUE; - } - if (sense_hdr->asc == 0x2a && sense_hdr->ascq == 0x07) { + if (sense_hdr->asc == 0x2a && sense_hdr->ascq == 0x07) /* * Implicit ALUA state transition failed */ return ADD_TO_MLQUEUE; - } - if (sense_hdr->asc == 0x3f && sense_hdr->ascq == 0x0e) { + if (sense_hdr->asc == 0x3f && sense_hdr->ascq == 0x03) + /* + * Inquiry data has changed + */ + return ADD_TO_MLQUEUE; + if (sense_hdr->asc == 0x3f && sense_hdr->ascq == 0x0e) /* * REPORTED_LUNS_DATA_HAS_CHANGED is reported * when switching controllers on targets like * Intel Multi-Flex. We can just retry. */ return ADD_TO_MLQUEUE; - } - break; } @@ -547,9 +506,9 @@ static int alua_rtpg(struct scsi_device *sdev, struct alua_dh_data *h) { struct scsi_sense_hdr sense_hdr; int len, k, off, valid_states = 0; - char *ucp; + unsigned char *ucp; unsigned err; - unsigned long expiry, interval = 10; + unsigned long expiry, interval = 1000; expiry = round_jiffies_up(jiffies + ALUA_FAILOVER_TIMEOUT); retry: @@ -610,7 +569,7 @@ static int alua_rtpg(struct scsi_device *sdev, struct alua_dh_data *h) case TPGS_STATE_TRANSITIONING: if (time_before(jiffies, expiry)) { /* State transition, retry */ - interval *= 10; + interval *= 2; msleep(interval); goto retry; } @@ -641,7 +600,7 @@ static int alua_initialize(struct scsi_device *sdev, struct alua_dh_data *h) { int err; - err = alua_std_inquiry(sdev, h); + err = alua_check_tpgs(sdev, h); if (err != SCSI_DH_OK) goto out; @@ -673,11 +632,9 @@ static int alua_activate(struct scsi_device *sdev, struct alua_dh_data *h = get_alua_data(sdev); int err = SCSI_DH_OK; - if (h->group_id != -1) { - err = alua_rtpg(sdev, h); - if (err != SCSI_DH_OK) - goto out; - } + err = alua_rtpg(sdev, h); + if (err != SCSI_DH_OK) + goto out; if (h->tpgs & TPGS_MODE_EXPLICIT && h->state != TPGS_STATE_OPTIMIZED && @@ -719,23 +676,10 @@ static int alua_prep_fn(struct scsi_device *sdev, struct request *req) } -static const struct scsi_dh_devlist alua_dev_list[] = { - {"HP", "MSA VOLUME" }, - {"HP", "HSV101" }, - {"HP", "HSV111" }, - {"HP", "HSV200" }, - {"HP", "HSV210" }, - {"HP", "HSV300" }, - {"IBM", "2107900" }, - {"IBM", "2145" }, - {"Pillar", "Axiom" }, - {"Intel", "Multi-Flex"}, - {"NETAPP", "LUN"}, - {"NETAPP", "LUN C-Mode"}, - {"AIX", "NVDISK"}, - {"Promise", "VTrak"}, - {NULL, NULL} -}; +static bool alua_match(struct scsi_device *sdev) +{ + return (scsi_device_tpgs(sdev) != 0); +} static int alua_bus_attach(struct scsi_device *sdev); static void alua_bus_detach(struct scsi_device *sdev); @@ -743,12 +687,12 @@ static void alua_bus_detach(struct scsi_device *sdev); static struct scsi_device_handler alua_dh = { .name = ALUA_DH_NAME, .module = THIS_MODULE, - .devlist = alua_dev_list, .attach = alua_bus_attach, .detach = alua_bus_detach, .prep_fn = alua_prep_fn, .check_sense = alua_check_sense, .activate = alua_activate, + .match = alua_match, }; /* @@ -790,6 +734,7 @@ static int alua_bus_attach(struct scsi_device *sdev) spin_lock_irqsave(sdev->request_queue->queue_lock, flags); sdev->scsi_dh_data = scsi_dh_data; spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags); + sdev_printk(KERN_NOTICE, sdev, "%s: Attached\n", ALUA_DH_NAME); return 0; diff --git a/drivers/scsi/device_handler/scsi_dh_emc.c b/drivers/scsi/device_handler/scsi_dh_emc.c index 48441f6..591186c 100644 --- a/drivers/scsi/device_handler/scsi_dh_emc.c +++ b/drivers/scsi/device_handler/scsi_dh_emc.c @@ -21,6 +21,7 @@ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/slab.h> +#include <linux/module.h> #include <scsi/scsi.h> #include <scsi/scsi_eh.h> #include <scsi/scsi_dh.h> diff --git a/drivers/scsi/device_handler/scsi_dh_hp_sw.c b/drivers/scsi/device_handler/scsi_dh_hp_sw.c index b479f1e..0f86a18 100644 --- a/drivers/scsi/device_handler/scsi_dh_hp_sw.c +++ b/drivers/scsi/device_handler/scsi_dh_hp_sw.c @@ -22,6 +22,7 @@ */ #include <linux/slab.h> +#include <linux/module.h> #include <scsi/scsi.h> #include <scsi/scsi_dbg.h> #include <scsi/scsi_eh.h> diff --git a/drivers/scsi/device_handler/scsi_dh_rdac.c b/drivers/scsi/device_handler/scsi_dh_rdac.c index e7fc70d..1d31279 100644 --- a/drivers/scsi/device_handler/scsi_dh_rdac.c +++ b/drivers/scsi/device_handler/scsi_dh_rdac.c @@ -1,5 +1,5 @@ /* - * Engenio/LSI RDAC SCSI Device Handler + * LSI/Engenio/NetApp E-Series RDAC SCSI Device Handler * * Copyright (C) 2005 Mike Christie. All rights reserved. * Copyright (C) Chandra Seetharaman, IBM Corp. 2007 @@ -24,6 +24,7 @@ #include <scsi/scsi_dh.h> #include <linux/workqueue.h> #include <linux/slab.h> +#include <linux/module.h> #define RDAC_NAME "rdac" #define RDAC_RETRY_COUNT 5 @@ -35,7 +36,7 @@ * mode page were taken from the LSI RDAC 2.4 GPL'd * driver, and then converted to Linux conventions. */ -#define RDAC_QUIESCENCE_TIME 20; +#define RDAC_QUIESCENCE_TIME 20 /* * Page Codes */ @@ -128,25 +129,7 @@ struct c4_inquiry { u8 reserved[2]; }; -struct rdac_controller { - u8 subsys_id[SUBSYS_ID_LEN]; - u8 slot_id[SLOT_ID_LEN]; - int use_ms10; - struct kref kref; - struct list_head node; /* list of all controllers */ - union { - struct rdac_pg_legacy legacy; - struct rdac_pg_expanded expanded; - } mode_select; - u8 index; - u8 array_name[ARRAY_LABEL_LEN]; - spinlock_t ms_lock; - int ms_queued; - struct work_struct ms_work; - struct scsi_device *ms_sdev; - struct list_head ms_head; -}; - +#define UNIQUE_ID_LEN 16 struct c8_inquiry { u8 peripheral_info; u8 page_code; /* 0xC8 */ @@ -159,12 +142,31 @@ struct c8_inquiry { u8 vol_user_label_len; u8 vol_user_label[60]; u8 array_uniq_id_len; - u8 array_unique_id[16]; + u8 array_unique_id[UNIQUE_ID_LEN]; u8 array_user_label_len; u8 array_user_label[60]; u8 lun[8]; }; +struct rdac_controller { + u8 array_id[UNIQUE_ID_LEN]; + int use_ms10; + struct kref kref; + struct list_head node; /* list of all controllers */ + union { + struct rdac_pg_legacy legacy; + struct rdac_pg_expanded expanded; + } mode_select; + u8 index; + u8 array_name[ARRAY_LABEL_LEN]; + struct Scsi_Host *host; + spinlock_t ms_lock; + int ms_queued; + struct work_struct ms_work; + struct scsi_device *ms_sdev; + struct list_head ms_head; +}; + struct c2_inquiry { u8 peripheral_info; u8 page_code; /* 0xC2 */ @@ -369,16 +371,17 @@ static void release_controller(struct kref *kref) kfree(ctlr); } -static struct rdac_controller *get_controller(u8 *subsys_id, u8 *slot_id, - char *array_name) +static struct rdac_controller *get_controller(int index, char *array_name, + u8 *array_id, struct scsi_device *sdev) { struct rdac_controller *ctlr, *tmp; spin_lock(&list_lock); list_for_each_entry(tmp, &ctlr_list, node) { - if ((memcmp(tmp->subsys_id, subsys_id, SUBSYS_ID_LEN) == 0) && - (memcmp(tmp->slot_id, slot_id, SLOT_ID_LEN) == 0)) { + if ((memcmp(tmp->array_id, array_id, UNIQUE_ID_LEN) == 0) && + (tmp->index == index) && + (tmp->host == sdev->host)) { kref_get(&tmp->kref); spin_unlock(&list_lock); return tmp; @@ -389,16 +392,11 @@ static struct rdac_controller *get_controller(u8 *subsys_id, u8 *slot_id, goto done; /* initialize fields of controller */ - memcpy(ctlr->subsys_id, subsys_id, SUBSYS_ID_LEN); - memcpy(ctlr->slot_id, slot_id, SLOT_ID_LEN); + memcpy(ctlr->array_id, array_id, UNIQUE_ID_LEN); + ctlr->index = index; + ctlr->host = sdev->host; memcpy(ctlr->array_name, array_name, ARRAY_LABEL_LEN); - /* update the controller index */ - if (slot_id[1] == 0x31) - ctlr->index = 0; - else - ctlr->index = 1; - kref_init(&ctlr->kref); ctlr->use_ms10 = -1; ctlr->ms_queued = 0; @@ -444,7 +442,7 @@ done: } static int get_lun_info(struct scsi_device *sdev, struct rdac_dh_data *h, - char *array_name) + char *array_name, u8 *array_id) { int err, i; struct c8_inquiry *inqp; @@ -463,6 +461,8 @@ static int get_lun_info(struct scsi_device *sdev, struct rdac_dh_data *h, *(array_name+i) = inqp->array_user_label[(2*i)+1]; *(array_name+ARRAY_LABEL_LEN-1) = '\0'; + memset(array_id, 0, UNIQUE_ID_LEN); + memcpy(array_id, inqp->array_unique_id, inqp->array_uniq_id_len); } return err; } @@ -504,16 +504,20 @@ static int check_ownership(struct scsi_device *sdev, struct rdac_dh_data *h) } static int initialize_controller(struct scsi_device *sdev, - struct rdac_dh_data *h, char *array_name) + struct rdac_dh_data *h, char *array_name, u8 *array_id) { - int err; + int err, index; struct c4_inquiry *inqp; err = submit_inquiry(sdev, 0xC4, sizeof(struct c4_inquiry), h); if (err == SCSI_DH_OK) { inqp = &h->inq.c4; - h->ctlr = get_controller(inqp->subsys_id, inqp->slot_id, - array_name); + /* get the controller index */ + if (inqp->slot_id[1] == 0x31) + index = 0; + else + index = 1; + h->ctlr = get_controller(index, array_name, array_id, sdev); if (!h->ctlr) err = SCSI_DH_RES_TEMP_UNAVAIL; } @@ -792,6 +796,7 @@ static const struct scsi_dh_devlist rdac_dev_list[] = { {"IBM", "3526"}, {"SGI", "TP9400"}, {"SGI", "TP9500"}, + {"SGI", "TP9700"}, {"SGI", "IS"}, {"STK", "OPENstorage D280"}, {"SUN", "CSM200_R"}, @@ -811,6 +816,7 @@ static const struct scsi_dh_devlist rdac_dev_list[] = { {"SUN", "CSM100_R_FC"}, {"SUN", "STK6580_6780"}, {"SUN", "SUN_6180"}, + {"SUN", "ArrayStorage"}, {NULL, NULL}, }; @@ -835,6 +841,7 @@ static int rdac_bus_attach(struct scsi_device *sdev) unsigned long flags; int err; char array_name[ARRAY_LABEL_LEN]; + char array_id[UNIQUE_ID_LEN]; scsi_dh_data = kzalloc(sizeof(*scsi_dh_data) + sizeof(*h) , GFP_KERNEL); @@ -849,11 +856,11 @@ static int rdac_bus_attach(struct scsi_device *sdev) h->lun = UNINITIALIZED_LUN; h->state = RDAC_STATE_ACTIVE; - err = get_lun_info(sdev, h, array_name); + err = get_lun_info(sdev, h, array_name, array_id); if (err != SCSI_DH_OK) goto failed; - err = initialize_controller(sdev, h, array_name); + err = initialize_controller(sdev, h, array_name, array_id); if (err != SCSI_DH_OK) goto failed; @@ -941,7 +948,7 @@ static void __exit rdac_exit(void) module_init(rdac_init); module_exit(rdac_exit); -MODULE_DESCRIPTION("Multipath LSI/Engenio RDAC driver"); +MODULE_DESCRIPTION("Multipath LSI/Engenio/NetApp E-Series RDAC driver"); MODULE_AUTHOR("Mike Christie, Chandra Seetharaman"); MODULE_VERSION("01.00.0000.0000"); MODULE_LICENSE("GPL"); |