diff options
Diffstat (limited to 'drivers/target/target_core_pscsi.c')
| -rw-r--r-- | drivers/target/target_core_pscsi.c | 1470 |
1 files changed, 1470 insertions, 0 deletions
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c new file mode 100644 index 000000000000..742d24609a9b --- /dev/null +++ b/drivers/target/target_core_pscsi.c @@ -0,0 +1,1470 @@ +/******************************************************************************* + * Filename: target_core_pscsi.c + * + * This file contains the generic target mode <-> Linux SCSI subsystem plugin. + * + * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc. + * Copyright (c) 2005, 2006, 2007 SBE, Inc. + * Copyright (c) 2007-2010 Rising Tide Systems + * Copyright (c) 2008-2010 Linux-iSCSI.org + * + * Nicholas A. Bellinger <nab@kernel.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + ******************************************************************************/ + +#include <linux/version.h> +#include <linux/string.h> +#include <linux/parser.h> +#include <linux/timer.h> +#include <linux/blkdev.h> +#include <linux/blk_types.h> +#include <linux/slab.h> +#include <linux/spinlock.h> +#include <linux/smp_lock.h> +#include <linux/genhd.h> +#include <linux/cdrom.h> +#include <linux/file.h> +#include <scsi/scsi.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_cmnd.h> +#include <scsi/scsi_host.h> +#include <scsi/libsas.h> /* For TASK_ATTR_* */ + +#include <target/target_core_base.h> +#include <target/target_core_device.h> +#include <target/target_core_transport.h> + +#include "target_core_pscsi.h" + +#define ISPRINT(a) ((a >= ' ') && (a <= '~')) + +static struct se_subsystem_api pscsi_template; + +static void pscsi_req_done(struct request *, int); + +/* pscsi_get_sh(): + * + * + */ +static struct Scsi_Host *pscsi_get_sh(u32 host_no) +{ + struct Scsi_Host *sh = NULL; + + sh = scsi_host_lookup(host_no); + if (IS_ERR(sh)) { + printk(KERN_ERR "Unable to locate SCSI HBA with Host ID:" + " %u\n", host_no); + return NULL; + } + + return sh; +} + +/* pscsi_attach_hba(): + * + * pscsi_get_sh() used scsi_host_lookup() to locate struct Scsi_Host. + * from the passed SCSI Host ID. + */ +static int pscsi_attach_hba(struct se_hba *hba, u32 host_id) +{ + int hba_depth; + struct pscsi_hba_virt *phv; + + phv = kzalloc(sizeof(struct pscsi_hba_virt), GFP_KERNEL); + if (!(phv)) { + printk(KERN_ERR "Unable to allocate struct pscsi_hba_virt\n"); + return -1; + } + phv->phv_host_id = host_id; + phv->phv_mode = PHV_VIRUTAL_HOST_ID; + hba_depth = PSCSI_VIRTUAL_HBA_DEPTH; + atomic_set(&hba->left_queue_depth, hba_depth); + atomic_set(&hba->max_queue_depth, hba_depth); + + hba->hba_ptr = (void *)phv; + + printk(KERN_INFO "CORE_HBA[%d] - TCM SCSI HBA Driver %s on" + " Generic Target Core Stack %s\n", hba->hba_id, + PSCSI_VERSION, TARGET_CORE_MOD_VERSION); + printk(KERN_INFO "CORE_HBA[%d] - Attached SCSI HBA to Generic" + " Target Core with TCQ Depth: %d\n", hba->hba_id, + atomic_read(&hba->max_queue_depth)); + + return 0; +} + +static void pscsi_detach_hba(struct se_hba *hba) +{ + struct pscsi_hba_virt *phv = hba->hba_ptr; + struct Scsi_Host *scsi_host = phv->phv_lld_host; + + if (scsi_host) { + scsi_host_put(scsi_host); + + printk(KERN_INFO "CORE_HBA[%d] - Detached SCSI HBA: %s from" + " Generic Target Core\n", hba->hba_id, + (scsi_host->hostt->name) ? (scsi_host->hostt->name) : + "Unknown"); + } else + printk(KERN_INFO "CORE_HBA[%d] - Detached Virtual SCSI HBA" + " from Generic Target Core\n", hba->hba_id); + + kfree(phv); + hba->hba_ptr = NULL; +} + +static int pscsi_pmode_enable_hba(struct se_hba *hba, unsigned long mode_flag) +{ + struct pscsi_hba_virt *phv = (struct pscsi_hba_virt *)hba->hba_ptr; + struct Scsi_Host *sh = phv->phv_lld_host; + int hba_depth = PSCSI_VIRTUAL_HBA_DEPTH; + /* + * Release the struct Scsi_Host + */ + if (!(mode_flag)) { + if (!(sh)) + return 0; + + phv->phv_lld_host = NULL; + phv->phv_mode = PHV_VIRUTAL_HOST_ID; + atomic_set(&hba->left_queue_depth, hba_depth); + atomic_set(&hba->max_queue_depth, hba_depth); + + printk(KERN_INFO "CORE_HBA[%d] - Disabled pSCSI HBA Passthrough" + " %s\n", hba->hba_id, (sh->hostt->name) ? + (sh->hostt->name) : "Unknown"); + + scsi_host_put(sh); + return 0; + } + /* + * Otherwise, locate struct Scsi_Host from the original passed + * pSCSI Host ID and enable for phba mode + */ + sh = pscsi_get_sh(phv->phv_host_id); + if (!(sh)) { + printk(KERN_ERR "pSCSI: Unable to locate SCSI Host for" + " phv_host_id: %d\n", phv->phv_host_id); + return -1; + } + /* + * Usually the SCSI LLD will use the hostt->can_queue value to define + * its HBA TCQ depth. Some other drivers (like 2.6 megaraid) don't set + * this at all and set sh->can_queue at runtime. + */ + hba_depth = (sh->hostt->can_queue > sh->can_queue) ? + sh->hostt->can_queue : sh->can_queue; + + atomic_set(&hba->left_queue_depth, hba_depth); + atomic_set(&hba->max_queue_depth, hba_depth); + + phv->phv_lld_host = sh; + phv->phv_mode = PHV_LLD_SCSI_HOST_NO; + + printk(KERN_INFO "CORE_HBA[%d] - Enabled pSCSI HBA Passthrough %s\n", + hba->hba_id, (sh->hostt->name) ? (sh->hostt->name) : "Unknown"); + + return 1; +} + +static void pscsi_tape_read_blocksize(struct se_device *dev, + struct scsi_device *sdev) +{ + unsigned char cdb[MAX_COMMAND_SIZE], *buf; + int ret; + + buf = kzalloc(12, GFP_KERNEL); + if (!buf) + return; + + memset(cdb, 0, MAX_COMMAND_SIZE); + cdb[0] = MODE_SENSE; + cdb[4] = 0x0c; /* 12 bytes */ + + ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 12, NULL, + HZ, 1, NULL); + if (ret) + goto out_free; + + /* + * If MODE_SENSE still returns zero, set the default value to 1024. + */ + sdev->sector_size = (buf[9] << 16) | (buf[10] << 8) | (buf[11]); + if (!sdev->sector_size) + sdev->sector_size = 1024; +out_free: + kfree(buf); +} + +static void +pscsi_set_inquiry_info(struct scsi_device *sdev, struct t10_wwn *wwn) +{ + unsigned char *buf; + + if (sdev->inquiry_len < INQUIRY_LEN) + return; + + buf = sdev->inquiry; + if (!buf) + return; + /* + * Use sdev->inquiry from drivers/scsi/scsi_scan.c:scsi_alloc_sdev() + */ + memcpy(&wwn->vendor[0], &buf[8], sizeof(wwn->vendor)); + memcpy(&wwn->model[0], &buf[16], sizeof(wwn->model)); + memcpy(&wwn->revision[0], &buf[32], sizeof(wwn->revision)); +} + +static int +pscsi_get_inquiry_vpd_serial(struct scsi_device *sdev, struct t10_wwn *wwn) +{ + unsigned char cdb[MAX_COMMAND_SIZE], *buf; + int ret; + + buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); + if (!buf) + return -1; + + memset(cdb, 0, MAX_COMMAND_SIZE); + cdb[0] = INQUIRY; + cdb[1] = 0x01; /* Query VPD */ + cdb[2] = 0x80; /* Unit Serial Number */ + cdb[3] = (INQUIRY_VPD_SERIAL_LEN >> 8) & 0xff; + cdb[4] = (INQUIRY_VPD_SERIAL_LEN & 0xff); + + ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, + INQUIRY_VPD_SERIAL_LEN, NULL, HZ, 1, NULL); + if (ret) + goto out_free; + + snprintf(&wwn->unit_serial[0], INQUIRY_VPD_SERIAL_LEN, "%s", &buf[4]); + + wwn->t10_sub_dev->su_dev_flags |= SDF_FIRMWARE_VPD_UNIT_SERIAL; + + kfree(buf); + return 0; + +out_free: + kfree(buf); + return -1; +} + +static void +pscsi_get_inquiry_vpd_device_ident(struct scsi_device *sdev, + struct t10_wwn *wwn) +{ + unsigned char cdb[MAX_COMMAND_SIZE], *buf, *page_83; + int ident_len, page_len, off = 4, ret; + struct t10_vpd *vpd; + + buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); + if (!buf) + return; + + memset(cdb, 0, MAX_COMMAND_SIZE); + cdb[0] = INQUIRY; + cdb[1] = 0x01; /* Query VPD */ + cdb[2] = 0x83; /* Device Identifier */ + cdb[3] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN >> 8) & 0xff; + cdb[4] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN & 0xff); + + ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, + INQUIRY_VPD_DEVICE_IDENTIFIER_LEN, + NULL, HZ, 1, NULL); + if (ret) + goto out; + + page_len = (buf[2] << 8) | buf[3]; + while (page_len > 0) { + /* Grab a pointer to the Identification descriptor */ + page_83 = &buf[off]; + ident_len = page_83[3]; + if (!ident_len) { + printk(KERN_ERR "page_83[3]: identifier" + " length zero!\n"); + break; + } + printk(KERN_INFO "T10 VPD Identifer Length: %d\n", ident_len); + + vpd = kzalloc(sizeof(struct t10_vpd), GFP_KERNEL); + if (!vpd) { + printk(KERN_ERR "Unable to allocate memory for" + " struct t10_vpd\n"); + goto out; + } + INIT_LIST_HEAD(&vpd->vpd_list); + + transport_set_vpd_proto_id(vpd, page_83); + transport_set_vpd_assoc(vpd, page_83); + + if (transport_set_vpd_ident_type(vpd, page_83) < 0) { + off += (ident_len + 4); + page_len -= (ident_len + 4); + kfree(vpd); + continue; + } + if (transport_set_vpd_ident(vpd, page_83) < 0) { + off += (ident_len + 4); + page_len -= (ident_len + 4); + kfree(vpd); + continue; + } + + list_add_tail(&vpd->vpd_list, &wwn->t10_vpd_list); + off += (ident_len + 4); + page_len -= (ident_len + 4); + } + +out: + kfree(buf); +} + +/* pscsi_add_device_to_list(): + * + * + */ +static struct se_device *pscsi_add_device_to_list( + struct se_hba *hba, + struct se_subsystem_dev *se_dev, + struct pscsi_dev_virt *pdv, + struct scsi_device *sd, + int dev_flags) +{ + struct se_device *dev; + struct se_dev_limits dev_limits; + struct request_queue *q; + struct queue_limits *limits; + + memset(&dev_limits, 0, sizeof(struct se_dev_limits)); + + if (!sd->queue_depth) { + sd->queue_depth = PSCSI_DEFAULT_QUEUEDEPTH; + + printk(KERN_ERR "Set broken SCSI Device %d:%d:%d" + " queue_depth to %d\n", sd->channel, sd->id, + sd->lun, sd->queue_depth); + } + /* + * Setup the local scope queue_limits from struct request_queue->limits + * to pass into transport_add_device_to_core_hba() as struct se_dev_limits. + */ + q = sd->request_queue; + limits = &dev_limits.limits; + limits->logical_block_size = sd->sector_size; + limits->max_hw_sectors = (sd->host->max_sectors > queue_max_hw_sectors(q)) ? + queue_max_hw_sectors(q) : sd->host->max_sectors; + limits->max_sectors = (sd->host->max_sectors > queue_max_sectors(q)) ? + queue_max_sectors(q) : sd->host->max_sectors; + dev_limits.hw_queue_depth = sd->queue_depth; + dev_limits.queue_depth = sd->queue_depth; + /* + * Setup our standard INQUIRY info into se_dev->t10_wwn + */ + pscsi_set_inquiry_info(sd, &se_dev->t10_wwn); + + /* + * Set the pointer pdv->pdv_sd to from passed struct scsi_device, + * which has already been referenced with Linux SCSI code with + * scsi_device_get() in this file's pscsi_create_virtdevice(). + * + * The passthrough operations called by the transport_add_device_* + * function below will require this pointer to be set for passthroug + * ops. + * + * For the shutdown case in pscsi_free_device(), this struct + * scsi_device reference is released with Linux SCSI code + * scsi_device_put() and the pdv->pdv_sd cleared. + */ + pdv->pdv_sd = sd; + + dev = transport_add_device_to_core_hba(hba, &pscsi_template, + se_dev, dev_flags, (void *)pdv, + &dev_limits, NULL, NULL); + if (!(dev)) { + pdv->pdv_sd = NULL; + return NULL; + } + + /* + * Locate VPD WWN Information used for various purposes within + * the Storage Engine. + */ + if (!pscsi_get_inquiry_vpd_serial(sd, &se_dev->t10_wwn)) { + /* + * If VPD Unit Serial returned GOOD status, try + * VPD Device Identification page (0x83). + */ + pscsi_get_inquiry_vpd_device_ident(sd, &se_dev->t10_wwn); + } + + /* + * For TYPE_TAPE, attempt to determine blocksize with MODE_SENSE. + */ + if (sd->type == TYPE_TAPE) + pscsi_tape_read_blocksize(dev, sd); + return dev; +} + +static void *pscsi_allocate_virtdevice(struct se_hba *hba, const char *name) +{ + struct pscsi_dev_virt *pdv; + + pdv = kzalloc(sizeof(struct pscsi_dev_virt), GFP_KERNEL); + if (!(pdv)) { + printk(KERN_ERR "Unable to allocate memory for struct pscsi_dev_virt\n"); + return NULL; + } + pdv->pdv_se_hba = hba; + + printk(KERN_INFO "PSCSI: Allocated pdv: %p for %s\n", pdv, name); + return (void *)pdv; +} + +/* + * Called with struct Scsi_Host->host_lock called. + */ +static struct se_device *pscsi_create_type_disk( + struct scsi_device *sd, + struct pscsi_dev_virt *pdv, + struct se_subsystem_dev *se_dev, + struct se_hba *hba) +{ + struct se_device *dev; + struct pscsi_hba_virt *phv = (struct pscsi_hba_virt *)pdv->pdv_se_hba->hba_ptr; + struct Scsi_Host *sh = sd->host; + struct block_device *bd; + u32 dev_flags = 0; + + if (scsi_device_get(sd)) { + printk(KERN_ERR "scsi_device_get() failed for %d:%d:%d:%d\n", + sh->host_no, sd->channel, sd->id, sd->lun); + spin_unlock_irq(sh->host_lock); + return NULL; + } + spin_unlock_irq(sh->host_lock); + /* + * Claim exclusive struct block_device access to struct scsi_device + * for TYPE_DISK using supplied udev_path + */ + bd = blkdev_get_by_path(se_dev->se_dev_udev_path, + FMODE_WRITE|FMODE_READ|FMODE_EXCL, pdv); + if (!(bd)) { + printk("pSCSI: blkdev_get_by_path() failed\n"); + scsi_device_put(sd); + return NULL; + } + pdv->pdv_bd = bd; + + dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags); + if (!(dev)) { + blkdev_put(pdv->pdv_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL); + scsi_device_put(sd); + return NULL; + } + printk(KERN_INFO "CORE_PSCSI[%d] - Added TYPE_DISK for %d:%d:%d:%d\n", + phv->phv_host_id, sh->host_no, sd->channel, sd->id, sd->lun); + + return dev; +} + +/* + * Called with struct Scsi_Host->host_lock called. + */ +static struct se_device *pscsi_create_type_rom( + struct scsi_device *sd, + struct pscsi_dev_virt *pdv, + struct se_subsystem_dev *se_dev, + struct se_hba *hba) +{ + struct se_device *dev; + struct pscsi_hba_virt *phv = (struct pscsi_hba_virt *)pdv->pdv_se_hba->hba_ptr; + struct Scsi_Host *sh = sd->host; + u32 dev_flags = 0; + + if (scsi_device_get(sd)) { + printk(KERN_ERR "scsi_device_get() failed for %d:%d:%d:%d\n", + sh->host_no, sd->channel, sd->id, sd->lun); + spin_unlock_irq(sh->host_lock); + return NULL; + } + spin_unlock_irq(sh->host_lock); + + dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags); + if (!(dev)) { + scsi_device_put(sd); + return NULL; + } + printk(KERN_INFO "CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n", + phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, + sd->channel, sd->id, sd->lun); + + return dev; +} + +/* + *Called with struct Scsi_Host->host_lock called. + */ +static struct se_device *pscsi_create_type_other( + struct scsi_device *sd, + struct pscsi_dev_virt *pdv, + struct se_subsystem_dev *se_dev, + struct se_hba *hba) +{ + struct se_device *dev; + struct pscsi_hba_virt *phv = (struct pscsi_hba_virt *)pdv->pdv_se_hba->hba_ptr; + struct Scsi_Host *sh = sd->host; + u32 dev_flags = 0; + + spin_unlock_irq(sh->host_lock); + dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags); + if (!(dev)) + return NULL; + + printk(KERN_INFO "CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n", + phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, + sd->channel, sd->id, sd->lun); + + return dev; +} + +static struct se_device *pscsi_create_virtdevice( + struct se_hba *hba, + struct se_subsystem_dev *se_dev, + void *p) +{ + struct pscsi_dev_virt *pdv = (struct pscsi_dev_virt *)p; + struct se_device *dev; + struct scsi_device *sd; + struct pscsi_hba_virt *phv = (struct pscsi_hba_virt *)hba->hba_ptr; + struct Scsi_Host *sh = phv->phv_lld_host; + int legacy_mode_enable = 0; + + if (!(pdv)) { + printk(KERN_ERR "Unable to locate struct pscsi_dev_virt" + " parameter\n"); + return NULL; + } + /* + * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the + * struct Scsi_Host we will need to bring the TCM/pSCSI object online + */ + if (!(sh)) { + if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { + printk(KERN_ERR "pSCSI: Unable to locate struct" + " Scsi_Host for PHV_LLD_SCSI_HOST_NO\n"); + return NULL; + } + /* + * For the newer PHV_VIRUTAL_HOST_ID struct scsi_device + * reference, we enforce that udev_path has been set + */ + if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH)) { + printk(KERN_ERR "pSCSI: udev_path attribute has not" + " been set before ENABLE=1\n"); + return NULL; + } + /* + * If no scsi_host_id= was passed for PHV_VIRUTAL_HOST_ID, + * use the original TCM hba ID to reference Linux/SCSI Host No + * and enable for PHV_LLD_SCSI_HOST_NO mode. + */ + if (!(pdv->pdv_flags & PDF_HAS_VIRT_HOST_ID)) { + spin_lock(&hba->device_lock); + if (!(list_empty(&hba->hba_dev_list))) { + printk(KERN_ERR "pSCSI: Unable to set hba_mode" + " with active devices\n"); + spin_unlock(&hba->device_lock); + return NULL; + } + spin_unlock(&hba->device_lock); + + if (pscsi_pmode_enable_hba(hba, 1) != 1) + return NULL; + + legacy_mode_enable = 1; + hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; + sh = phv->phv_lld_host; + } else { + sh = pscsi_get_sh(pdv->pdv_host_id); + if (!(sh)) { + printk(KERN_ERR "pSCSI: Unable to locate" + " pdv_host_id: %d\n", pdv->pdv_host_id); + return NULL; + } + } + } else { + if (phv->phv_mode == PHV_VIRUTAL_HOST_ID) { + printk(KERN_ERR "pSCSI: PHV_VIRUTAL_HOST_ID set while" + " struct Scsi_Host exists\n"); + return NULL; + } + } + + spin_lock_irq(sh->host_lock); + list_for_each_entry(sd, &sh->__devices, siblings) { + if ((pdv->pdv_channel_id != sd->channel) || + (pdv->pdv_target_id != sd->id) || + (pdv->pdv_lun_id != sd->lun)) + continue; + /* + * Functions will release the held struct scsi_host->host_lock + * before calling calling pscsi_add_device_to_list() to register + * struct scsi_device with target_core_mod. + */ + switch (sd->type) { + case TYPE_DISK: + dev = pscsi_create_type_disk(sd, pdv, se_dev, hba); + break; + case TYPE_ROM: + dev = pscsi_create_type_rom(sd, pdv, se_dev, hba); + break; + default: + dev = pscsi_create_type_other(sd, pdv, se_dev, hba); + break; + } + + if (!(dev)) { + if (phv->phv_mode == PHV_VIRUTAL_HOST_ID) + scsi_host_put(sh); + else if (legacy_mode_enable) { + pscsi_pmode_enable_hba(hba, 0); + hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; + } + pdv->pdv_sd = NULL; + return NULL; + } + return dev; + } + spin_unlock_irq(sh->host_lock); + + printk(KERN_ERR "pSCSI: Unable to locate %d:%d:%d:%d\n", sh->host_no, + pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id); + + if (phv->phv_mode == PHV_VIRUTAL_HOST_ID) + scsi_host_put(sh); + else if (legacy_mode_enable) { + pscsi_pmode_enable_hba(hba, 0); + hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; + } + + return NULL; +} + +/* pscsi_free_device(): (Part of se_subsystem_api_t template) + * + * + */ +static void pscsi_free_device(void *p) +{ + struct pscsi_dev_virt *pdv = p; + struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr; + struct scsi_device *sd = pdv->pdv_sd; + + if (sd) { + /* + * Release exclusive pSCSI internal struct block_device claim for + * struct scsi_device with TYPE_DISK from pscsi_create_type_disk() + */ + if ((sd->type == TYPE_DISK) && pdv->pdv_bd) { + blkdev_put(pdv->pdv_bd, + FMODE_WRITE|FMODE_READ|FMODE_EXCL); + pdv->pdv_bd = NULL; + } + /* + * For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference + * to struct Scsi_Host now. + */ + if ((phv->phv_mode == PHV_LLD_SCSI_HOST_NO) && + (phv->phv_lld_host != NULL)) + scsi_host_put(phv->phv_lld_host); + + if ((sd->type == TYPE_DISK) || (sd->type == TYPE_ROM)) + scsi_device_put(sd); + + pdv->pdv_sd = NULL; + } + + kfree(pdv); +} + +static inline struct pscsi_plugin_task *PSCSI_TASK(struct se_task *task) +{ + return container_of(task, struct pscsi_plugin_task, pscsi_task); +} + + +/* pscsi_transport_complete(): + * + * + */ +static int pscsi_transport_complete(struct se_task *task) +{ + struct pscsi_dev_virt *pdv = task->se_dev->dev_ptr; + struct scsi_device *sd = pdv->pdv_sd; + int result; + struct pscsi_plugin_task *pt = PSCSI_TASK(task); + unsigned char *cdb = &pt->pscsi_cdb[0]; + + result = pt->pscsi_result; + /* + * Hack to make sure that Write-Protect modepage is set if R/O mode is + * forced. + */ + if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) && + (status_byte(result) << 1) == SAM_STAT_GOOD) { + if (!TASK_CMD(task)->se_deve) + goto after_mode_sense; + + if (TASK_CMD(task)->se_deve->lun_flags & + TRANSPORT_LUNFLAGS_READ_ONLY) { + unsigned char *buf = (unsigned char *) + T_TASK(task->task_se_cmd)->t_task_buf; + + if (cdb[0] == MODE_SENSE_10) { + if (!(buf[3] & 0x80)) + buf[3] |= 0x80; + } else { + if (!(buf[2] & 0x80)) + buf[2] |= 0x80; + } + } + } +after_mode_sense: + + if (sd->type != TYPE_TAPE) + goto after_mode_select; + + /* + * Hack to correctly obtain the initiator requested blocksize for + * TYPE_TAPE. Since this value is dependent upon each tape media, + * struct scsi_device->sector_size will not contain the correct value + * by default, so we go ahead and set it so + * TRANSPORT(dev)->get_blockdev() returns the correct value to the + * storage engine. + */ + if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) && + (status_byte(result) << 1) == SAM_STAT_GOOD) { + unsigned char *buf; + struct scatterlist *sg = task->task_sg; + u16 bdl; + u32 blocksize; + + buf = sg_virt(&sg[0]); + if (!(buf)) { + printk(KERN_ERR "Unable to get buf for scatterlist\n"); + goto after_mode_select; + } + + if (cdb[0] == MODE_SELECT) + bdl = (buf[3]); + else + bdl = (buf[6] << 8) | (buf[7]); + + if (!bdl) + goto after_mode_select; + + if (cdb[0] == MODE_SELECT) + blocksize = (buf[9] << 16) | (buf[10] << 8) | + (buf[11]); + else + blocksize = (buf[13] << 16) | (buf[14] << 8) | + (buf[15]); + + sd->sector_size = blocksize; + } +after_mode_select: + + if (status_byte(result) & CHECK_CONDITION) + return 1; + + return 0; +} + +static struct se_task * +pscsi_alloc_task(struct se_cmd *cmd) +{ + struct pscsi_plugin_task *pt; + unsigned char *cdb = T_TASK(cmd)->t_task_cdb; + + pt = kzalloc(sizeof(struct pscsi_plugin_task), GFP_KERNEL); + if (!pt) { + printk(KERN_ERR "Unable to allocate struct pscsi_plugin_task\n"); + return NULL; + } + + /* + * If TCM Core is signaling a > TCM_MAX_COMMAND_SIZE allocation, + * allocate the extended CDB buffer for per struct se_task context + * pt->pscsi_cdb now. + */ + if (T_TASK(cmd)->t_task_cdb != T_TASK(cmd)->__t_task_cdb) { + + pt->pscsi_cdb = kzalloc(scsi_command_size(cdb), GFP_KERNEL); + if (!(pt->pscsi_cdb)) { + printk(KERN_ERR "pSCSI: Unable to allocate extended" + " pt->pscsi_cdb\n"); + return NULL; + } + } else + pt->pscsi_cdb = &pt->__pscsi_cdb[0]; + + return &pt->pscsi_task; +} + +static inline void pscsi_blk_init_request( + struct se_task *task, + struct pscsi_plugin_task *pt, + struct request *req, + int bidi_read) +{ + /* + * Defined as "scsi command" in include/linux/blkdev.h. + */ + req->cmd_type = REQ_TYPE_BLOCK_PC; + /* + * For the extra BIDI-COMMAND READ struct request we do not + * need to setup the remaining structure members + */ + if (bidi_read) + return; + /* + * Setup the done function pointer for struct request, + * also set the end_io_data pointer.to struct se_task. + */ + req->end_io = pscsi_req_done; + req->end_io_data = (void *)task; + /* + * Load the referenced struct se_task's SCSI CDB into + * include/linux/blkdev.h:struct request->cmd + */ + req->cmd_len = scsi_command_size(pt->pscsi_cdb); + req->cmd = &pt->pscsi_cdb[0]; + /* + * Setup pointer for outgoing sense data. + */ + req->sense = (void *)&pt->pscsi_sense[0]; + req->sense_len = 0; +} + +/* + * Used for pSCSI data payloads for all *NON* SCF_SCSI_DATA_SG_IO_CDB +*/ +static int pscsi_blk_get_request(struct se_task *task) +{ + struct pscsi_plugin_task *pt = PSCSI_TASK(task); + struct pscsi_dev_virt *pdv = task->se_dev->dev_ptr; + + pt->pscsi_req = blk_get_request(pdv->pdv_sd->request_queue, + (task->task_data_direction == DMA_TO_DEVICE), + GFP_KERNEL); + if (!(pt->pscsi_req) || IS_ERR(pt->pscsi_req)) { + printk(KERN_ERR "PSCSI: blk_get_request() failed: %ld\n", + IS_ERR(pt->pscsi_req)); + return PYX_TRANSPORT_LU_COMM_FAILURE; + } + /* + * Setup the newly allocated struct request for REQ_TYPE_BLOCK_PC, + * and setup rq callback, CDB and sense. + */ + pscsi_blk_init_request(task, pt, pt->pscsi_req, 0); + return 0; +} + +/* pscsi_do_task(): (Part of se_subsystem_api_t template) + * + * + */ +static int pscsi_do_task(struct se_task *task) +{ + struct pscsi_plugin_task *pt = PSCSI_TASK(task); + struct pscsi_dev_virt *pdv = task->se_dev->dev_ptr; + /* + * Set the struct request->timeout value based on peripheral + * device type from SCSI. + */ + if (pdv->pdv_sd->type == TYPE_DISK) + pt->pscsi_req->timeout = PS_TIMEOUT_DISK; + else + pt->pscsi_req->timeout = PS_TIMEOUT_OTHER; + + pt->pscsi_req->retries = PS_RETRY; + /* + * Queue the struct request into the struct scsi_device->request_queue. + * Also check for HEAD_OF_QUEUE SAM TASK attr from received se_cmd + * descriptor + */ + blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, pt->pscsi_req, + (task->task_se_cmd->sam_task_attr == TASK_ATTR_HOQ), + pscsi_req_done); + + return PYX_TRANSPORT_SENT_TO_TRANSPORT; +} + +static void pscsi_free_task(struct se_task *task) +{ + struct pscsi_plugin_task *pt = PSCSI_TASK(task); + struct se_cmd *cmd = task->task_se_cmd; + + /* + * Release the extended CDB allocation from pscsi_alloc_task() + * if one exists. + */ + if (T_TASK(cmd)->t_task_cdb != T_TASK(cmd)->__t_task_cdb) + kfree(pt->pscsi_cdb); + /* + * We do not release the bio(s) here associated with this task, as + * this is handled by bio_put() and pscsi_bi_endio(). + */ + kfree(pt); +} + +enum { + Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id, + Opt_scsi_lun_id, Opt_err +}; + +static match_table_t tokens = { + {Opt_scsi_host_id, "scsi_host_id=%d"}, + {Opt_scsi_channel_id, "scsi_channel_id=%d"}, + {Opt_scsi_target_id, "scsi_target_id=%d"}, + {Opt_scsi_lun_id, "scsi_lun_id=%d"}, + {Opt_err, NULL} +}; + +static ssize_t pscsi_set_configfs_dev_params(struct se_hba *hba, + struct se_subsystem_dev *se_dev, + const char *page, + ssize_t count) +{ + struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr; + struct pscsi_hba_virt *phv = hba->hba_ptr; + char *orig, *ptr, *opts; + substring_t args[MAX_OPT_ARGS]; + int ret = 0, arg, token; + + opts = kstrdup(page, GFP_KERNEL); + if (!opts) + return -ENOMEM; + + orig = opts; + + while ((ptr = strsep(&opts, ",")) != NULL) { + if (!*ptr) + continue; + + token = match_token(ptr, tokens, args); + switch (token) { + case Opt_scsi_host_id: + if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { + printk(KERN_ERR "PSCSI[%d]: Unable to accept" + " scsi_host_id while phv_mode ==" + " PHV_LLD_SCSI_HOST_NO\n", + phv->phv_host_id); + ret = -EINVAL; + goto out; + } + match_int(args, &arg); + pdv->pdv_host_id = arg; + printk(KERN_INFO "PSCSI[%d]: Referencing SCSI Host ID:" + " %d\n", phv->phv_host_id, pdv->pdv_host_id); + pdv->pdv_flags |= PDF_HAS_VIRT_HOST_ID; + break; + case Opt_scsi_channel_id: + match_int(args, &arg); + pdv->pdv_channel_id = arg; + printk(KERN_INFO "PSCSI[%d]: Referencing SCSI Channel" + " ID: %d\n", phv->phv_host_id, + pdv->pdv_channel_id); + pdv->pdv_flags |= PDF_HAS_CHANNEL_ID; + break; + case Opt_scsi_target_id: + match_int(args, &arg); + pdv->pdv_target_id = arg; + printk(KERN_INFO "PSCSI[%d]: Referencing SCSI Target" + " ID: %d\n", phv->phv_host_id, + pdv->pdv_target_id); + pdv->pdv_flags |= PDF_HAS_TARGET_ID; + break; + case Opt_scsi_lun_id: + match_int(args, &arg); + pdv->pdv_lun_id = arg; + printk(KERN_INFO "PSCSI[%d]: Referencing SCSI LUN ID:" + " %d\n", phv->phv_host_id, pdv->pdv_lun_id); + pdv->pdv_flags |= PDF_HAS_LUN_ID; + break; + default: + break; + } + } + +out: + kfree(orig); + return (!ret) ? count : ret; +} + +static ssize_t pscsi_check_configfs_dev_params( + struct se_hba *hba, + struct se_subsystem_dev *se_dev) +{ + struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr; + + if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) || + !(pdv->pdv_flags & PDF_HAS_TARGET_ID) || + !(pdv->pdv_flags & PDF_HAS_LUN_ID)) { + printk(KERN_ERR "Missing scsi_channel_id=, scsi_target_id= and" + " scsi_lun_id= parameters\n"); + return -1; + } + + return 0; +} + +static ssize_t pscsi_show_configfs_dev_params(struct se_hba *hba, + struct se_subsystem_dev *se_dev, + char *b) +{ + struct pscsi_hba_virt *phv = hba->hba_ptr; + struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr; + struct scsi_device *sd = pdv->pdv_sd; + unsigned char host_id[16]; + ssize_t bl; + int i; + + if (phv->phv_mode == PHV_VIRUTAL_HOST_ID) + snprintf(host_id, 16, "%d", pdv->pdv_host_id); + else + snprintf(host_id, 16, "PHBA Mode"); + + bl = sprintf(b, "SCSI Device Bus Location:" + " Channel ID: %d Target ID: %d LUN: %d Host ID: %s\n", + pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id, + host_id); + + if (sd) { + bl += sprintf(b + bl, " "); + bl += sprintf(b + bl, "Vendor: "); + for (i = 0; i < 8; i++) { + if (ISPRINT(sd->vendor[i])) /* printable character? */ + bl += sprintf(b + bl, "%c", sd->vendor[i]); + else + bl += sprintf(b + bl, " "); + } + bl += sprintf(b + bl, " Model: "); + for (i = 0; i < 16; i++) { + if (ISPRINT(sd->model[i])) /* printable character ? */ + bl += sprintf(b + bl, "%c", sd->model[i]); + else + bl += sprintf(b + bl, " "); + } + bl += sprintf(b + bl, " Rev: "); + for (i = 0; i < 4; i++) { + if (ISPRINT(sd->rev[i])) /* printable character ? */ + bl += sprintf(b + bl, "%c", sd->rev[i]); + else + bl += sprintf(b + bl, " "); + } + bl += sprintf(b + bl, "\n"); + } + return bl; +} + +static void pscsi_bi_endio(struct bio *bio, int error) +{ + bio_put(bio); +} + +static inline struct bio *pscsi_get_bio(struct pscsi_dev_virt *pdv, int sg_num) +{ + struct bio *bio; + /* + * Use bio_malloc() following the comment in for bio -> struct request + * in block/blk-core.c:blk_make_request() + */ + bio = bio_kmalloc(GFP_KERNEL, sg_num); + if (!(bio)) { + printk(KERN_ERR "PSCSI: bio_kmalloc() failed\n"); + return NULL; + } + bio->bi_end_io = pscsi_bi_endio; + + return bio; +} + +#if 0 +#define DEBUG_PSCSI(x...) printk(x) +#else +#define DEBUG_PSCSI(x...) +#endif + +static int __pscsi_map_task_SG( + struct se_task *task, + struct scatterlist *task_sg, + u32 task_sg_num, + int bidi_read) +{ + struct pscsi_plugin_task *pt = PSCSI_TASK(task); + struct pscsi_dev_virt *pdv = task->se_dev->dev_ptr; + struct bio *bio = NULL, *hbio = NULL, *tbio = NULL; + struct page *page; + struct scatterlist *sg; + u32 data_len = task->task_size, i, len, bytes, off; + int nr_pages = (task->task_size + task_sg[0].offset + + PAGE_SIZE - 1) >> PAGE_SHIFT; + int nr_vecs = 0, rc, ret = PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES; + int rw = (task->task_data_direction == DMA_TO_DEVICE); + + if (!task->task_size) + return 0; + /* + * For SCF_SCSI_DATA_SG_IO_CDB, Use fs/bio.c:bio_add_page() to setup + * the bio_vec maplist from TC< struct se_mem -> task->task_sg -> + * struct scatterlist memory. The struct se_task->task_sg[] currently needs + * to be attached to struct bios for submission to Linux/SCSI using + * struct request to struct scsi_device->request_queue. + * + * Note that this will be changing post v2.6.28 as Target_Core_Mod/pSCSI + * is ported to upstream SCSI passthrough functionality that accepts + * struct scatterlist->page_link or struct page as a paraemeter. + */ + DEBUG_PSCSI("PSCSI: nr_pages: %d\n", nr_pages); + + for_each_sg(task_sg, sg, task_sg_num, i) { + page = sg_page(sg); + off = sg->offset; + len = sg->length; + + DEBUG_PSCSI("PSCSI: i: %d page: %p len: %d off: %d\n", i, + page, len, off); + + while (len > 0 && data_len > 0) { + bytes = min_t(unsigned int, len, PAGE_SIZE - off); + bytes = min(bytes, data_len); + + if (!(bio)) { + nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages); + nr_pages -= nr_vecs; + /* + * Calls bio_kmalloc() and sets bio->bi_end_io() + */ + bio = pscsi_get_bio(pdv, nr_vecs); + if (!(bio)) + goto fail; + + if (rw) + bio->bi_rw |= REQ_WRITE; + + DEBUG_PSCSI("PSCSI: Allocated bio: %p," + " dir: %s nr_vecs: %d\n", bio, + (rw) ? "rw" : "r", nr_vecs); + /* + * Set *hbio pointer to handle the case: + * nr_pages > BIO_MAX_PAGES, where additional + * bios need to be added to complete a given + * struct se_task + */ + if (!hbio) + hbio = tbio = bio; + else + tbio = tbio->bi_next = bio; + } + + DEBUG_PSCSI("PSCSI: Calling bio_add_pc_page() i: %d" + " bio: %p page: %p len: %d off: %d\n", i, bio, + page, len, off); + + rc = bio_add_pc_page(pdv->pdv_sd->request_queue, + bio, page, bytes, off); + if (rc != bytes) + goto fail; + + DEBUG_PSCSI("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n", + bio->bi_vcnt, nr_vecs); + + if (bio->bi_vcnt > nr_vecs) { + DEBUG_PSCSI("PSCSI: Reached bio->bi_vcnt max:" + " %d i: %d bio: %p, allocating another" + " bio\n", bio->bi_vcnt, i, bio); + /* + * Clear the pointer so that another bio will + * be allocated with pscsi_get_bio() above, the + * current bio has already been set *tbio and + * bio->bi_next. + */ + bio = NULL; + } + + page++; + len -= bytes; + data_len -= bytes; + off = 0; + } + } + /* + * Setup the primary pt->pscsi_req used for non BIDI and BIDI-COMMAND + * primary SCSI WRITE poayload mapped for struct se_task->task_sg[] + */ + if (!(bidi_read)) { + /* + * Starting with v2.6.31, call blk_make_request() passing in *hbio to + * allocate the pSCSI task a struct request. + */ + pt->pscsi_req = blk_make_request(pdv->pdv_sd->request_queue, + hbio, GFP_KERNEL); + if (!(pt->pscsi_req)) { + printk(KERN_ERR "pSCSI: blk_make_request() failed\n"); + goto fail; + } + /* + * Setup the newly allocated struct request for REQ_TYPE_BLOCK_PC, + * and setup rq callback, CDB and sense. + */ + pscsi_blk_init_request(task, pt, pt->pscsi_req, 0); + + return task->task_sg_num; + } + /* + * Setup the secondary pt->pscsi_req->next_rq used for the extra BIDI-COMMAND + * SCSI READ paylaod mapped for struct se_task->task_sg_bidi[] + */ + pt->pscsi_req->next_rq = blk_make_request(pdv->pdv_sd->request_queue, + hbio, GFP_KERNEL); + if (!(pt->pscsi_req->next_rq)) { + printk(KERN_ERR "pSCSI: blk_make_request() failed for BIDI\n"); + goto fail; + } + pscsi_blk_init_request(task, pt, pt->pscsi_req->next_rq, 1); + + return task->task_sg_num; +fail: + while (hbio) { + bio = hbio; + hbio = hbio->bi_next; + bio->bi_next = NULL; + bio_endio(bio, 0); + } + return ret; +} + +static int pscsi_map_task_SG(struct se_task *task) +{ + int ret; + + /* + * Setup the main struct request for the task->task_sg[] payload + */ + + ret = __pscsi_map_task_SG(task, task->task_sg, task->task_sg_num, 0); + if (ret >= 0 && task->task_sg_bidi) { + /* + * If present, set up the extra BIDI-COMMAND SCSI READ + * struct request and payload. + */ + ret = __pscsi_map_task_SG(task, task->task_sg_bidi, + task->task_sg_num, 1); + } + + if (ret < 0) + return PYX_TRANSPORT_LU_COMM_FAILURE; + return 0; +} + +/* pscsi_map_task_non_SG(): + * + * + */ +static int pscsi_map_task_non_SG(struct se_task *task) +{ + struct se_cmd *cmd = TASK_CMD(task); + struct pscsi_plugin_task *pt = PSCSI_TASK(task); + struct pscsi_dev_virt *pdv = task->se_dev->dev_ptr; + int ret = 0; + + if (pscsi_blk_get_request(task) < 0) + return PYX_TRANSPORT_LU_COMM_FAILURE; + + if (!task->task_size) + return 0; + + ret = blk_rq_map_kern(pdv->pdv_sd->request_queue, + pt->pscsi_req, T_TASK(cmd)->t_task_buf, + task->task_size, GFP_KERNEL); + if (ret < 0) { + printk(KERN_ERR "PSCSI: blk_rq_map_kern() failed: %d\n", ret); + return PYX_TRANSPORT_LU_COMM_FAILURE; + } + return 0; +} + +static int pscsi_CDB_none(struct se_task *task) +{ + return pscsi_blk_get_request(task); +} + +/* pscsi_get_cdb(): + * + * + */ +static unsigned char *pscsi_get_cdb(struct se_task *task) +{ + struct pscsi_plugin_task *pt = PSCSI_TASK(task); + + return pt->pscsi_cdb; +} + +/* pscsi_get_sense_buffer(): + * + * + */ +static unsigned char *pscsi_get_sense_buffer(struct se_task *task) +{ + struct pscsi_plugin_task *pt = PSCSI_TASK(task); + + return (unsigned char *)&pt->pscsi_sense[0]; +} + +/* pscsi_get_device_rev(): + * + * + */ +static u32 pscsi_get_device_rev(struct se_device *dev) +{ + struct pscsi_dev_virt *pdv = dev->dev_ptr; + struct scsi_device *sd = pdv->pdv_sd; + + return (sd->scsi_level - 1) ? sd->scsi_level - 1 : 1; +} + +/* pscsi_get_device_type(): + * + * + */ +static u32 pscsi_get_device_type(struct se_device *dev) +{ + struct pscsi_dev_virt *pdv = dev->dev_ptr; + struct scsi_device *sd = pdv->pdv_sd; + + return sd->type; +} + +static sector_t pscsi_get_blocks(struct se_device *dev) +{ + struct pscsi_dev_virt *pdv = dev->dev_ptr; + + if (pdv->pdv_bd && pdv->pdv_bd->bd_part) + return pdv->pdv_bd->bd_part->nr_sects; + + dump_stack(); + return 0; +} + +/* pscsi_handle_SAM_STATUS_failures(): + * + * + */ +static inline void pscsi_process_SAM_status( + struct se_task *task, + struct pscsi_plugin_task *pt) +{ + task->task_scsi_status = status_byte(pt->pscsi_result); + if ((task->task_scsi_status)) { + task->task_scsi_status <<= 1; + printk(KERN_INFO "PSCSI Status Byte exception at task: %p CDB:" + " 0x%02x Result: 0x%08x\n", task, pt->pscsi_cdb[0], + pt->pscsi_result); + } + + switch (host_byte(pt->pscsi_result)) { + case DID_OK: + transport_complete_task(task, (!task->task_scsi_status)); + break; + default: + printk(KERN_INFO "PSCSI Host Byte exception at task: %p CDB:" + " 0x%02x Result: 0x%08x\n", task, pt->pscsi_cdb[0], + pt->pscsi_result); + task->task_scsi_status = SAM_STAT_CHECK_CONDITION; + task->task_error_status = PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; + TASK_CMD(task)->transport_error_status = + PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; + transport_complete_task(task, 0); + break; + } + + return; +} + +static void pscsi_req_done(struct request *req, int uptodate) +{ + struct se_task *task = req->end_io_data; + struct pscsi_plugin_task *pt = PSCSI_TASK(task); + + pt->pscsi_result = req->errors; + pt->pscsi_resid = req->resid_len; + + pscsi_process_SAM_status(task, pt); + /* + * Release BIDI-READ if present + */ + if (req->next_rq != NULL) + __blk_put_request(req->q, req->next_rq); + + __blk_put_request(req->q, req); + pt->pscsi_req = NULL; +} + +static struct se_subsystem_api pscsi_template = { + .name = "pscsi", + .owner = THIS_MODULE, + .transport_type = TRANSPORT_PLUGIN_PHBA_PDEV, + .cdb_none = pscsi_CDB_none, + .map_task_non_SG = pscsi_map_task_non_SG, + .map_task_SG = pscsi_map_task_SG, + .attach_hba = pscsi_attach_hba, + .detach_hba = pscsi_detach_hba, + .pmode_enable_hba = pscsi_pmode_enable_hba, + .allocate_virtdevice = pscsi_allocate_virtdevice, + .create_virtdevice = pscsi_create_virtdevice, + .free_device = pscsi_free_device, + .transport_complete = pscsi_transport_complete, + .alloc_task = pscsi_alloc_task, + .do_task = pscsi_do_task, + .free_task = pscsi_free_task, + .check_configfs_dev_params = pscsi_check_configfs_dev_params, + .set_configfs_dev_params = pscsi_set_configfs_dev_params, + .show_configfs_dev_params = pscsi_show_configfs_dev_params, + .get_cdb = pscsi_get_cdb, + .get_sense_buffer = pscsi_get_sense_buffer, + .get_device_rev = pscsi_get_device_rev, + .get_device_type = pscsi_get_device_type, + .get_blocks = pscsi_get_blocks, +}; + +static int __init pscsi_module_init(void) +{ + return transport_subsystem_register(&pscsi_template); +} + +static void pscsi_module_exit(void) +{ + transport_subsystem_release(&pscsi_template); +} + +MODULE_DESCRIPTION("TCM PSCSI subsystem plugin"); +MODULE_AUTHOR("nab@Linux-iSCSI.org"); +MODULE_LICENSE("GPL"); + +module_init(pscsi_module_init); +module_exit(pscsi_module_exit); |