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Message-Id: <1253311686.4498.147.camel@haakon2.linux-iscsi.org>
Date: Fri, 18 Sep 2009 15:08:06 -0700
From: "Nicholas A. Bellinger" <nab@...ux-iscsi.org>
To: LKML <linux-kernel@...r.kernel.org>,
linux-scsi <linux-scsi@...r.kernel.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
Greg KH <greg@...ah.com>,
Douglas Gilbert <dgilbert@...erlog.com>,
James Bottomley <James.Bottomley@...senPartnership.com>,
Hannes Reinecke <hare@...e.de>,
FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
Mike Christie <michaelc@...wisc.edu>,
Joel Becker <joel.becker@...cle.com>,
"Martin K. Petersen" <martin.petersen@...cle.com>,
Christoph Hellwig <hch@....de>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Alan Stern <stern@...land.harvard.edu>,
Boaz Harrosh <bharrosh@...asas.com>,
Florian Haas <florian.haas@...bit.com>,
Philipp Reisner <philipp.reisner@...bit.com>,
Lars Ellenberg <lars.ellenberg@...bit.com>,
Daniel Walker <dwalker@...o99.com>
Subject: [RFC PATCH 4/19] Target_Core_Mod FILEIO <-> Linux/VFS subsystem
[RFC PATCH 4/19] Target_Core_Mod FILEIO <-> Linux/VFS subsystem
This patch adds the buffered FILEIO subsystem plugin for accessing struct file
from upstream Linux/VFS code.
It also includes AIO kernel code and O_DIRECT (needs seperate kernel patch for non buffered kernel file I/O),
that are currently disabled.
Signed-off-by: Nicholas A. Bellinger <nab@...ux-iscsi.org>
diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c
new file mode 100644
index 0000000..767dcc7
--- /dev/null
+++ b/drivers/target/target_core_file.c
@@ -0,0 +1,1228 @@
+/*******************************************************************************
+ * Filename: target_core_file.c
+ *
+ * This file contains the Storage Engine <-> FILEIO transport specific functions
+ *
+ * Copyright (c) 2005 PyX Technologies, Inc.
+ * Copyright (c) 2005-2006 SBE, Inc. All Rights Reserved.
+ * Copyright (c) 2007-2009 Rising Tide Software, Inc.
+ * Copyright (c) 2008-2009 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@...nel.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.
+ *
+ ******************************************************************************/
+
+
+#define TARGET_CORE_FILE_C
+
+#include <linux/version.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/blkdev.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/smp_lock.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_device.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_file.h>
+
+#undef TARGET_CORE_FILE_C
+
+/* fd_attach_hba(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+int fd_attach_hba(se_hba_t *hba, u32 host_id)
+{
+ fd_host_t *fd_host;
+
+ fd_host = kzalloc(sizeof(fd_host_t), GFP_KERNEL);
+ if (!(fd_host)) {
+ printk(KERN_ERR "Unable to allocate memory for fd_host_t\n");
+ return -1;
+ }
+
+ fd_host->fd_host_id = host_id;
+
+ atomic_set(&hba->left_queue_depth, FD_HBA_QUEUE_DEPTH);
+ atomic_set(&hba->max_queue_depth, FD_HBA_QUEUE_DEPTH);
+ hba->hba_ptr = (void *) fd_host;
+ hba->transport = &fileio_template;
+
+ printk(KERN_INFO "CORE_HBA[%d] - TCM FILEIO HBA Driver %s on Generic"
+ " Target Core Stack %s\n", hba->hba_id, FD_VERSION,
+ TARGET_CORE_MOD_VERSION);
+ printk(KERN_INFO "CORE_HBA[%d] - Attached FILEIO HBA: %u to Generic"
+ " Target Core with TCQ Depth: %d MaxSectors: %u\n",
+ hba->hba_id, fd_host->fd_host_id,
+ atomic_read(&hba->max_queue_depth), FD_MAX_SECTORS);
+
+ return 0;
+}
+
+/* fd_detach_hba(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+int fd_detach_hba(se_hba_t *hba)
+{
+ fd_host_t *fd_host;
+
+ if (!hba->hba_ptr) {
+ printk(KERN_ERR "hba->hba_ptr is NULL!\n");
+ return -1;
+ }
+ fd_host = (fd_host_t *) hba->hba_ptr;
+
+ printk(KERN_INFO "CORE_HBA[%d] - Detached FILEIO HBA: %u from Generic"
+ " Target Core\n", hba->hba_id, fd_host->fd_host_id);
+
+ kfree(fd_host);
+ hba->hba_ptr = NULL;
+
+ return 0;
+}
+
+int fd_claim_phydevice(se_hba_t *hba, se_device_t *dev)
+{
+ fd_dev_t *fd_dev = (fd_dev_t *)dev->dev_ptr;
+ struct block_device *bd;
+
+ if (fd_dev->fd_bd)
+ return 0;
+
+ if (dev->dev_flags & DF_READ_ONLY) {
+ printk(KERN_INFO "FILEIO: Using previously claimed %p Major"
+ ":Minor - %d:%d\n", fd_dev->fd_bd, fd_dev->fd_major,
+ fd_dev->fd_minor);
+ } else {
+ printk(KERN_INFO "FILEIO: Claiming %p Major:Minor - %d:%d\n",
+ fd_dev, fd_dev->fd_major, fd_dev->fd_minor);
+
+ bd = linux_blockdevice_claim(fd_dev->fd_major,
+ fd_dev->fd_minor, (void *)fd_dev);
+ if (!(bd))
+ return -1;
+
+ fd_dev->fd_bd = bd;
+ fd_dev->fd_bd->bd_contains = bd;
+ }
+
+ return 0;
+}
+
+int fd_release_phydevice(se_device_t *dev)
+{
+ fd_dev_t *fd_dev = (fd_dev_t *)dev->dev_ptr;
+
+ if (!fd_dev->fd_bd)
+ return 0;
+
+ if (dev->dev_flags & DF_READ_ONLY) {
+ printk(KERN_INFO "FILEIO: Calling blkdev_put() for Major:Minor"
+ " - %d:%d\n", fd_dev->fd_major, fd_dev->fd_minor);
+ blkdev_put((struct block_device *)fd_dev->fd_bd, FMODE_READ);
+ } else {
+ printk(KERN_INFO "FILEIO: Releasing Major:Minor - %d:%d\n",
+ fd_dev->fd_major, fd_dev->fd_minor);
+ linux_blockdevice_release(fd_dev->fd_major, fd_dev->fd_minor,
+ (struct block_device *)fd_dev->fd_bd);
+ }
+ fd_dev->fd_bd = NULL;
+
+ return 0;
+}
+
+void *fd_allocate_virtdevice(se_hba_t *hba, const char *name)
+{
+ fd_dev_t *fd_dev;
+ fd_host_t *fd_host = (fd_host_t *) hba->hba_ptr;
+
+ fd_dev = kzalloc(sizeof(fd_dev_t), GFP_KERNEL);
+ if (!(fd_dev)) {
+ printk(KERN_ERR "Unable to allocate memory for fd_dev_t\n");
+ return NULL;
+ }
+
+ fd_dev->fd_host = fd_host;
+
+ printk(KERN_INFO "FILEIO: Allocated fd_dev for %p\n", name);
+
+ return fd_dev;
+}
+
+/* fd_create_virtdevice(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+se_device_t *fd_create_virtdevice(
+ se_hba_t *hba,
+ se_subsystem_dev_t *se_dev,
+ void *p)
+{
+ char *dev_p = NULL;
+ se_device_t *dev;
+ fd_dev_t *fd_dev = (fd_dev_t *) p;
+ fd_host_t *fd_host = (fd_host_t *) hba->hba_ptr;
+ mm_segment_t old_fs;
+ struct block_device *bd = NULL;
+ struct file *file;
+ struct inode *inode = NULL;
+ struct request_queue *q;
+ unsigned long long blocks_long;
+ int dev_flags = 0, flags;
+
+ old_fs = get_fs();
+ set_fs(get_ds());
+ dev_p = getname(fd_dev->fd_dev_name);
+ set_fs(old_fs);
+
+ if (IS_ERR(dev_p)) {
+ printk(KERN_ERR "getname(%s) failed: %lu\n",
+ fd_dev->fd_dev_name, IS_ERR(dev_p));
+ goto fail;
+ }
+#if 0
+ if (di->no_create_file)
+ flags = O_RDWR | O_LARGEFILE;
+ else
+ flags = O_RDWR | O_CREAT | O_LARGEFILE;
+#else
+ flags = O_RDWR | O_CREAT | O_LARGEFILE;
+#endif
+/* flags |= O_DIRECT; */
+
+ file = filp_open(dev_p, flags, 0600);
+
+ if (IS_ERR(file) || !file || !file->f_dentry) {
+ printk(KERN_ERR "filp_open(%s) failed\n", dev_p);
+ goto fail;
+ }
+ fd_dev->fd_file = file;
+ /*
+ * If we are claiming a blockend for this struct file, we extract
+ * fd_dev->fd_size from struct block_device.
+ *
+ * Otherwise, we use the passed fd_size= from configfs
+ */
+ inode = igrab(file->f_mapping->host);
+ if (!(inode)) {
+ printk(KERN_ERR "FILEIO: Unable to locate struct inode from"
+ " struct file\n");
+ goto fail;
+ }
+ /*
+ * If struct file is referencing a underlying struct block_device,
+ * claim it now.
+ */
+ if (S_ISBLK(inode->i_mode)) {
+ fd_dev->fd_bd = I_BDEV(file->f_mapping->host);
+ if (!(fd_dev->fd_bd)) {
+ printk(KERN_ERR "FILEIO: Unable to locate struct"
+ " block_device\n");
+ goto fail;
+ }
+ fd_dev->fd_major = fd_dev->fd_bd->bd_disk->major;
+ fd_dev->fd_minor = fd_dev->fd_bd->bd_disk->first_minor;
+
+ printk(KERN_INFO "FILEIO: Claiming %p Major:Minor - %d:%d\n",
+ fd_dev, fd_dev->fd_major, fd_dev->fd_minor);
+
+ bd = linux_blockdevice_claim(fd_dev->fd_bd->bd_disk->major,
+ fd_dev->fd_bd->bd_disk->first_minor,
+ fd_dev);
+ if (!(bd)) {
+ printk(KERN_ERR "FILEIO: Unable to claim"
+ " struct block_device\n");
+ goto fail;
+ }
+
+ dev_flags |= DF_CLAIMED_BLOCKDEV;
+ if (dev_flags & DF_CLAIMED_BLOCKDEV)
+ fd_dev->fd_bd->bd_contains = bd;
+ /*
+ * Determine the number of bytes for this FILEIO device from
+ * struct block_device's block count and block_size.
+ */
+ blocks_long = (get_capacity(bd->bd_disk) - 1);
+ q = bdev_get_queue(bd);
+ fd_dev->fd_dev_size = ((unsigned long long)blocks_long *
+ bdev_logical_block_size(bd));
+ printk(KERN_INFO "FILEIO: Using size: %llu bytes from struct"
+ " block_device blocks: %llu logical_block_size: %d\n",
+ fd_dev->fd_dev_size, blocks_long,
+ bdev_logical_block_size(bd));
+ } else {
+ if (!(fd_dev->fbd_flags & FBDF_HAS_SIZE)) {
+ printk(KERN_ERR "FILEIO: Missing fd_dev_size="
+ " parameter, and no backing struct"
+ " block_device\n");
+ goto fail;
+ }
+ }
+ /*
+ * Pass dev_flags for linux_blockdevice_claim_bd or
+ * linux_blockdevice_claim() from the usage above.
+ *
+ * Note that transport_add_device_to_core_hba() will call
+ * linux_blockdevice_release() internally on failure to
+ * call bd_release() on the referenced struct block_device.
+ */
+ dev = transport_add_device_to_core_hba(hba, &fileio_template,
+ se_dev, dev_flags, (void *)fd_dev);
+ if (!(dev))
+ goto fail;
+
+ fd_dev->fd_dev_id = fd_host->fd_host_dev_id_count++;
+ fd_dev->fd_queue_depth = dev->queue_depth;
+
+ printk(KERN_INFO "CORE_FILE[%u] - Added TCM FILEIO Device ID: %u at %s,"
+ " %llu total bytes\n", fd_host->fd_host_id, fd_dev->fd_dev_id,
+ fd_dev->fd_dev_name, fd_dev->fd_dev_size);
+
+ iput(inode);
+ putname(dev_p);
+ return dev;
+fail:
+ if (fd_dev->fd_file) {
+ filp_close(fd_dev->fd_file, NULL);
+ fd_dev->fd_file = NULL;
+ }
+ fd_dev->fd_bd = NULL;
+ fd_dev->fd_major = 0;
+ fd_dev->fd_minor = 0;
+ if (inode)
+ iput(inode);
+ putname(dev_p);
+ return NULL;
+}
+
+/* fd_activate_device(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+int fd_activate_device(se_device_t *dev)
+{
+ fd_dev_t *fd_dev = (fd_dev_t *) dev->dev_ptr;
+ fd_host_t *fd_host = fd_dev->fd_host;
+
+ printk(KERN_INFO "CORE_FILE[%u] - Activating Device with TCQ: %d at"
+ " FILEIO Device ID: %d\n", fd_host->fd_host_id,
+ fd_dev->fd_queue_depth, fd_dev->fd_dev_id);
+
+ return 0;
+}
+
+/* fd_deactivate_device(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+void fd_deactivate_device(se_device_t *dev)
+{
+ fd_dev_t *fd_dev = (fd_dev_t *) dev->dev_ptr;
+ fd_host_t *fd_host = fd_dev->fd_host;
+
+ printk(KERN_INFO "CORE_FILE[%u] - Deactivating Device with TCQ: %d at"
+ " FILEIO Device ID: %d\n", fd_host->fd_host_id,
+ fd_dev->fd_queue_depth, fd_dev->fd_dev_id);
+
+ return;
+}
+
+/* fd_free_device(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+void fd_free_device(void *p)
+{
+ fd_dev_t *fd_dev = (fd_dev_t *) p;
+
+ if (fd_dev->fd_file) {
+ filp_close(fd_dev->fd_file, NULL);
+ fd_dev->fd_file = NULL;
+ }
+
+ kfree(fd_dev);
+}
+
+/* fd_transport_complete(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+int fd_transport_complete(se_task_t *task)
+{
+ return 0;
+}
+
+/* fd_allocate_request(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+void *fd_allocate_request(
+ se_task_t *task,
+ se_device_t *dev)
+{
+ fd_request_t *fd_req;
+
+ fd_req = kzalloc(sizeof(fd_request_t), GFP_KERNEL);
+ if (!(fd_req)) {
+ printk(KERN_ERR "Unable to allocate fd_request_t\n");
+ return NULL;
+ }
+
+ fd_req->fd_dev = (fd_dev_t *) dev->dev_ptr;
+
+ return (void *)fd_req;
+}
+
+/* fd_emulate_inquiry():
+ *
+ *
+ */
+int fd_emulate_inquiry(se_task_t *task)
+{
+ unsigned char prod[64], se_location[128];
+ se_cmd_t *cmd = TASK_CMD(task);
+ fd_dev_t *fdev = (fd_dev_t *) task->se_dev->dev_ptr;
+ se_hba_t *hba = task->se_dev->se_hba;
+
+ memset(prod, 0, 64);
+ memset(se_location, 0, 128);
+
+ sprintf(prod, "FILEIO");
+ sprintf(se_location, "%u_%u", hba->hba_id, fdev->fd_dev_id);
+
+ return transport_generic_emulate_inquiry(cmd, TYPE_DISK, prod,
+ FD_VERSION, se_location);
+}
+
+/* fd_emulate_read_cap():
+ *
+ *
+ */
+static int fd_emulate_read_cap(se_task_t *task)
+{
+ fd_dev_t *fd_dev = (fd_dev_t *) task->se_dev->dev_ptr;
+ unsigned long long blocks_long = div_u64(fd_dev->fd_dev_size,
+ DEV_ATTRIB(task->se_dev)->block_size);
+ u32 blocks;
+
+ if (blocks_long >= 0x00000000ffffffff)
+ blocks = 0xffffffff;
+ else
+ blocks = (u32)blocks_long;
+
+ return transport_generic_emulate_readcapacity(TASK_CMD(task), blocks);
+}
+
+static int fd_emulate_read_cap16(se_task_t *task)
+{
+ fd_dev_t *fd_dev = (fd_dev_t *) task->se_dev->dev_ptr;
+ unsigned long long blocks_long = div_u64(fd_dev->fd_dev_size,
+ DEV_ATTRIB(task->se_dev)->block_size);
+
+ return transport_generic_emulate_readcapacity_16(TASK_CMD(task),
+ blocks_long);
+}
+
+/* fd_emulate_scsi_cdb():
+ *
+ *
+ */
+static int fd_emulate_scsi_cdb(se_task_t *task)
+{
+ int ret;
+ se_cmd_t *cmd = TASK_CMD(task);
+ fd_request_t *fd_req = (fd_request_t *) task->transport_req;
+
+ switch (fd_req->fd_scsi_cdb[0]) {
+ case INQUIRY:
+ if (fd_emulate_inquiry(task) < 0)
+ return PYX_TRANSPORT_INVALID_CDB_FIELD;
+ break;
+ case READ_CAPACITY:
+ ret = fd_emulate_read_cap(task);
+ if (ret < 0)
+ return ret;
+ break;
+ case MODE_SENSE:
+ ret = transport_generic_emulate_modesense(TASK_CMD(task),
+ fd_req->fd_scsi_cdb, fd_req->fd_buf, 0,
+ TYPE_DISK);
+ if (ret < 0)
+ return ret;
+ break;
+ case MODE_SENSE_10:
+ ret = transport_generic_emulate_modesense(TASK_CMD(task),
+ fd_req->fd_scsi_cdb, fd_req->fd_buf, 1,
+ TYPE_DISK);
+ if (ret < 0)
+ return ret;
+ break;
+ case SERVICE_ACTION_IN:
+ if ((T_TASK(cmd)->t_task_cdb[1] & 0x1f) !=
+ SAI_READ_CAPACITY_16) {
+ printk(KERN_ERR "Unsupported SA: 0x%02x\n",
+ T_TASK(cmd)->t_task_cdb[1] & 0x1f);
+ return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
+ }
+ ret = fd_emulate_read_cap16(task);
+ if (ret < 0)
+ return ret;
+ break;
+ case REQUEST_SENSE:
+ ret = transport_generic_emulate_request_sense(cmd,
+ T_TASK(cmd)->t_task_cdb);
+ if (ret < 0)
+ return ret;
+ break;
+ case ALLOW_MEDIUM_REMOVAL:
+ case ERASE:
+ case REZERO_UNIT:
+ case SEEK_10:
+ case SPACE:
+ case START_STOP:
+ case SYNCHRONIZE_CACHE:
+ case TEST_UNIT_READY:
+ case VERIFY:
+ case WRITE_FILEMARKS:
+ case RESERVE:
+ case RESERVE_10:
+ case RELEASE:
+ case RELEASE_10:
+ break;
+ default:
+ printk(KERN_ERR "Unsupported SCSI Opcode: 0x%02x for FILEIO\n",
+ fd_req->fd_scsi_cdb[0]);
+ return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
+ }
+
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+
+ return PYX_TRANSPORT_SENT_TO_TRANSPORT;
+}
+
+static inline int fd_iovec_alloc(fd_request_t *req)
+{
+ req->fd_iovs = kzalloc(sizeof(struct iovec) * req->fd_sg_count,
+ GFP_KERNEL);
+ if (!(req->fd_iovs)) {
+ printk(KERN_ERR "Unable to allocate req->fd_iovs\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+static inline int fd_seek(
+ struct file *fd,
+ unsigned long long lba,
+ u32 block_size)
+{
+ mm_segment_t old_fs;
+ unsigned long long offset;
+
+ old_fs = get_fs();
+ set_fs(get_ds());
+ if (fd->f_op->llseek)
+ offset = fd->f_op->llseek(fd, lba * block_size, 0);
+ else
+ offset = default_llseek(fd, lba * block_size, 0);
+ set_fs(old_fs);
+#if 0
+ printk(KERN_INFO "lba: %llu : block_size: %d\n", lba, block_size);
+ printk(KERN_INFO "offset from llseek: %llu\n", offset);
+ printk(KERN_INFO "(lba * block_size): %llu\n", (lba * block_size));
+#endif
+ if (offset != (lba * block_size)) {
+ printk(KERN_ERR "offset: %llu not equal to LBA: %llu\n",
+ offset, (lba * block_size));
+ return -1;
+ }
+
+ return 0;
+}
+
+static int fd_do_readv(fd_request_t *req, se_task_t *task)
+{
+ int ret = 0;
+ u32 i;
+ mm_segment_t old_fs;
+ struct file *fd = req->fd_dev->fd_file;
+ struct scatterlist *sg = task->task_sg;
+ struct iovec iov[req->fd_sg_count];
+
+ memset(iov, 0, sizeof(struct iovec) + req->fd_sg_count);
+
+ if (fd_seek(fd, req->fd_lba, DEV_ATTRIB(task->se_dev)->block_size) < 0)
+ return -1;
+
+ for (i = 0; i < req->fd_sg_count; i++) {
+ iov[i].iov_len = sg[i].length;
+ iov[i].iov_base = sg_virt(&sg[i]);
+ }
+
+ old_fs = get_fs();
+ set_fs(get_ds());
+ ret = vfs_readv(fd, &iov[0], req->fd_sg_count, &fd->f_pos);
+ set_fs(old_fs);
+
+ if (ret < 0) {
+ printk(KERN_ERR "vfs_readv() returned %d\n", ret);
+ return -1;
+ }
+
+ return 1;
+}
+
+#if 0
+
+static void fd_aio_intr(struct kiocb *kcb)
+{
+ se_task_t *task = (se_task_t *)kcb->private;
+
+ printk(KERN_INFO "Got AIO_READ Response: task: %p\n", task);
+
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+}
+
+static ssize_t fd_aio_retry(struct kiocb *kcb)
+{
+ printk(KERN_WARNING "fd_aio_retry() called for %p\n", kcb);
+ return 0;
+}
+
+static int fd_do_aio_read(fd_request_t *req, se_task_t *task)
+{
+ int ret = 0;
+ u32 i, length = 0;
+ u32 block_size = DEV_ATTRIB(task->se_dev)->block_size;
+ unsigned long long offset, lba = req->fd_lba;;
+ mm_segment_t old_fs;
+ struct file *fd = req->fd_dev->fd_file;
+ struct scatterlist *sg = task->task_sg;
+ struct iovec *iov;
+ struct kiocb *iocb;
+
+ if (fd_iovec_alloc(req) < 0)
+ return -1;
+
+ old_fs = get_fs();
+ set_fs(get_ds());
+ if (fd->f_op->llseek)
+ offset = fd->f_op->llseek(fd, lba * block_size, 0);
+ else
+ offset = default_llseek(fd, lba * block_size, 0);
+ set_fs(old_fs);
+
+ printk(KERN_INFO "lba: %llu : block_size: %d\n", lba, block_size);
+ printk(KERN_INFO "offset from llseek: %llu\n", offset);
+ printk(KERN_INFO "(lba * block_size): %llu\n", (lba * block_size));
+
+ if (offset != (lba * block_size)) {
+ printk(KERN_ERR "offset: %llu not equal to LBA: %llu\n",
+ offset, (lba * block_size));
+ return -1;
+ }
+ printk(KERN_INFO "req->fd_lba: %llu\n", req->fd_lba);
+
+ for (i = 0; i < req->fd_sg_count; i++) {
+ iov = &req->fd_iovs[i];
+ printk(KERN_INFO "sg->length: %d sg->page: %p\n",
+ sg[i].length, sg[i].page);
+ length += sg[i].length;
+ iov->iov_len = sg[i].length;
+ iov->iov_base = sg_virt(&sg[i]);
+ printk(KERN_INFO "iov_iov_len: %d iov_iov_base: %p\n",
+ iov->iov_len, iov->iov_base);
+ }
+
+ init_sync_kiocb(&req->fd_iocb, fd);
+ req->fd_iocb.ki_opcode = IOCB_CMD_PREAD;
+ req->fd_iocb.ki_nbytes = length;
+ req->fd_iocb.private = (void *) task;
+ req->fd_iocb.ki_dtor = &fd_aio_intr;
+ req->fd_iocb.ki_retry = &fd_aio_retry;
+
+ printk(KERN_INFO "Launching AIO_READ: %p iovecs: %p total length:"
+ " %u\n", &req->fd_iocb, &req->fd_iovs[0], length);
+ printk(KERN_INFO "fd->f_pos: %d\n", fd->f_pos);
+ printk(KERN_INFO "req->fd_iocb.ki_pos: %d\n", req->fd_iocb.ki_pos);
+
+ old_fs = get_fs();
+ set_fs(get_ds());
+ ret = __generic_file_aio_read(&req->fd_iocb, &req->fd_iovs[0],
+ req->fd_sg_count, &fd->f_pos);
+ set_fs(old_fs);
+
+ printk(KERN_INFO"__generic_file_aio_read() returned %d\n", ret);
+
+ if (ret <= 0)
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+
+ if (ret != length)
+ printk(KERN_ERR "ret [%d] != LENGTH [%d]\n", ret, length);
+
+ return 1;
+}
+
+void fd_sendfile_free_DMA(se_cmd_t *cmd)
+{
+ printk(KERN_INFO "Release reference to pages now..\n");
+}
+
+static int fd_sendactor(
+ read_descriptor_t *desc,
+ struct page *page,
+ unsigned long offset,
+ unsigned long size)
+{
+ unsigned long count = desc->count;
+ se_task_t *task = desc->arg.data;
+ fd_request_t *req = (fd_request_t *) task->transport_req;
+ struct scatterlist *sg = task->task_sg;
+
+ printk(KERN_INFO "page: %p offset: %lu size: %lu\n", page,
+ offset, size);
+
+ __free_page(sg[req->fd_cur_offset].page);
+
+ printk(KERN_INFO "page_address(page): %p\n", page_address(page));
+ sg[req->fd_cur_offset].page = page;
+ sg[req->fd_cur_offset].offset = offset;
+ sg[req->fd_cur_offset].length = size;
+
+ printk(KERN_INFO "sg[%d:%p].page %p length: %d\n", req->fd_cur_offset,
+ &sg[req->fd_cur_offset], sg[req->fd_cur_offset].page,
+ sg[req->fd_cur_offset].length);
+
+ req->fd_cur_size += size;
+ printk(KERN_INFO "fd_cur_size: %u\n", req->fd_cur_size);
+
+ req->fd_cur_offset++;
+
+ desc->count--;
+ desc->written += size;
+ return size;
+}
+
+static int fd_do_sendfile(fd_request_t *req, se_task_t *task)
+{
+ int ret = 0;
+ struct file *fd = req->fd_dev->fd_file;
+
+ if (fd_seek(fd, req->fd_lba, DEV_ATTRIB(task->se_dev)->block_size) < 0)
+ return -1;
+
+ TASK_CMD(task)->transport_free_DMA = &fd_sendfile_free_DMA;
+
+ ret = fd->f_op->sendfile(fd, &fd->f_pos, req->fd_sg_count,
+ fd_sendactor, (void *)task);
+
+ if (ret < 0) {
+ printk(KERN_ERR "fd->f_op->sendfile() returned %d\n", ret);
+ return -1;
+ }
+
+ return 1;
+}
+#endif
+
+static int fd_do_writev(fd_request_t *req, se_task_t *task)
+{
+ int ret = 0;
+ u32 i;
+ struct file *fd = req->fd_dev->fd_file;
+ struct scatterlist *sg = task->task_sg;
+ mm_segment_t old_fs;
+ struct iovec iov[req->fd_sg_count];
+
+ memset(iov, 0, sizeof(struct iovec) + req->fd_sg_count);
+
+ if (fd_seek(fd, req->fd_lba, DEV_ATTRIB(task->se_dev)->block_size) < 0)
+ return -1;
+
+ for (i = 0; i < req->fd_sg_count; i++) {
+ iov[i].iov_len = sg[i].length;
+ iov[i].iov_base = sg_virt(&sg[i]);
+ }
+
+ old_fs = get_fs();
+ set_fs(get_ds());
+ ret = vfs_writev(fd, &iov[0], req->fd_sg_count, &fd->f_pos);
+ set_fs(old_fs);
+
+ if (ret < 0) {
+ printk(KERN_ERR "vfs_writev() returned %d\n", ret);
+ return -1;
+ }
+
+ return 1;
+}
+
+#if 0
+
+static int fd_do_aio_write(fd_request_t *req, se_task_t *task)
+{
+ int ret = 0;
+ u32 i, length = 0;
+ u32 block_size = DEV_ATTRIB(task->se_dev)->block_size;
+ unsigned long long offset, lba = req->fd_lba;
+ mm_segment_t old_fs;
+ struct file *fd = req->fd_dev->fd_file;
+ struct scatterlist *sg = task->task_sg;
+ struct iovec *iov;
+ struct kiocb *iocb;
+
+ if (fd_iovec_alloc(req) < 0)
+ return -1;
+
+ old_fs = get_fs();
+ set_fs(get_ds());
+ if (fd->f_op->llseek)
+ offset = fd->f_op->llseek(fd, lba * block_size, 0);
+ else
+ offset = default_llseek(fd, lba * block_size, 0);
+ set_fs(old_fs);
+
+ printk(KERN_INFO "lba: %llu : block_size: %d\n", lba, block_size);
+ printk(KERN_INFO "offset from llseek: %llu\n", offset);
+ printk(KERN_INFO "(lba * block_size): %llu\n", (lba * block_size));
+
+ if (offset != (lba * block_size)) {
+ printk(KERN_ERR "offset: %llu not equal to LBA: %llu\n",
+ offset, (lba * block_size));
+ return -1;
+ }
+
+ for (i = 0; i < req->fd_sg_count; i++) {
+ iov = &req->fd_iovs[i];
+ printk(KERN_INFO "sg->length: %d sg->page: %p\n",
+ sg[i].length, sg[i].page);
+
+ length += sg[i].length;
+ iov->iov_len = sg[i].length;
+ iov->iov_base = sg_virt(&sg[i]);
+ printk(KERN_INFO "iov_iov_len: %d iov_iov_base: %p\n",
+ iov->iov_len, iov->iov_base);
+ }
+
+ init_sync_kiocb(&req->fd_iocb, fd);
+ req->fd_iocb.ki_opcode = IOCB_CMD_PWRITE;
+ req->fd_iocb.ki_nbytes = length;
+ req->fd_iocb.private = (void *) task;
+ req->fd_iocb.ki_dtor = &fd_aio_intr;
+ req->fd_iocb.ki_retry = &fd_aio_retry;
+
+ printk(KERN_INFO "Launching AIO_WRITE: %p iovecs: %p total length:"
+ " %u\n", &req->fd_iocb, &req->fd_iovs[0], length);
+ printk(KERN_INFO "fd->f_pos: %d\n", fd->f_pos);
+ printk(KERN_INFO "req->fd_iocb.ki_pos: %d\n", req->fd_iocb.ki_pos);
+
+ old_fs = get_fs();
+ set_fs(get_ds());
+ ret = generic_file_aio_write_nolock(&req->fd_iocb, &req->fd_iovs[0],
+ req->fd_sg_count, &fd->f_pos);
+ set_fs(old_fs);
+
+ printk(KERN_INFO "generic_file_aio_write_nolock() returned %d\n", ret);
+
+ if (ret <= 0)
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+
+ if (ret != length)
+ printk(KERN_ERR "ret [%d] != WRITE LENGTH [%d]\n", ret, length);
+
+ return 1;
+}
+#endif
+
+int fd_do_task(se_task_t *task)
+{
+ int ret = 0;
+ fd_request_t *req = (fd_request_t *) task->transport_req;
+
+ if (!(TASK_CMD(task)->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB))
+ return fd_emulate_scsi_cdb(task);
+
+ req->fd_lba = task->task_lba;
+ req->fd_size = task->task_size;
+
+ if (req->fd_data_direction == FD_DATA_READ) {
+ /* ret = fd_do_aio_read(req, task); */
+ /* ret = fd_do_sendfile(req, task); */
+ ret = fd_do_readv(req, task);
+ } else {
+ /* ret = fd_do_aio_write(req, task); */
+ ret = fd_do_writev(req, task);
+ }
+
+ if (ret < 0)
+ return ret;
+
+ if (ret) {
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+ }
+
+ return PYX_TRANSPORT_SENT_TO_TRANSPORT;
+}
+
+/* fd_free_task(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+void fd_free_task(se_task_t *task)
+{
+ fd_request_t *req;
+
+ req = (fd_request_t *) task->transport_req;
+ kfree(req->fd_iovs);
+
+ kfree(req);
+}
+
+ssize_t fd_set_configfs_dev_params(
+ se_hba_t *hba,
+ se_subsystem_dev_t *se_dev,
+ const char *page, ssize_t count)
+{
+ fd_dev_t *fd_dev = (fd_dev_t *) se_dev->se_dev_su_ptr;
+ char *buf, *cur, *ptr, *ptr2;
+ int params = 0;
+
+ buf = kzalloc(count, GFP_KERNEL);
+ if (!(buf)) {
+ printk(KERN_ERR "Unable to allocate memory for"
+ " temporary buffer\n");
+ return 0;
+ }
+ memcpy(buf, page, count);
+ cur = buf;
+
+ while (cur) {
+ ptr = strstr(cur, "=");
+ if (!(ptr))
+ goto out;
+
+ *ptr = '\0';
+ ptr++;
+
+ ptr2 = strstr(cur, "fd_dev_name");
+ if (ptr2) {
+ transport_check_dev_params_delim(ptr, &cur);
+ ptr = strstrip(ptr);
+ snprintf(fd_dev->fd_dev_name, FD_MAX_DEV_NAME,
+ "%s", ptr);
+ printk(KERN_INFO "FILEIO: Referencing Path: %s\n",
+ fd_dev->fd_dev_name);
+ fd_dev->fbd_flags |= FBDF_HAS_PATH;
+ params++;
+ continue;
+ }
+ ptr2 = strstr(cur, "fd_dev_size");
+ if (ptr2) {
+ transport_check_dev_params_delim(ptr, &cur);
+ if (strict_strtoull(ptr, 0, &fd_dev->fd_dev_size) < 0) {
+ printk(KERN_ERR "strict_strtoull() failed for"
+ " fd_dev_size=\n");
+ continue;
+ }
+ printk(KERN_INFO "FILEIO: Referencing Size: %llu"
+ " bytes\n", fd_dev->fd_dev_size);
+ fd_dev->fbd_flags |= FBDF_HAS_SIZE;
+ params++;
+ continue;
+ } else
+ cur = NULL;
+ }
+
+out:
+ kfree(buf);
+ return (params) ? count : -EINVAL;
+}
+
+ssize_t fd_check_configfs_dev_params(se_hba_t *hba, se_subsystem_dev_t *se_dev)
+{
+ fd_dev_t *fd_dev = (fd_dev_t *) se_dev->se_dev_su_ptr;
+
+ if (!(fd_dev->fbd_flags & FBDF_HAS_PATH)) {
+ printk(KERN_ERR "Missing fd_dev_name=\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+ssize_t fd_show_configfs_dev_params(
+ se_hba_t *hba,
+ se_subsystem_dev_t *se_dev,
+ char *page)
+{
+ fd_dev_t *fd_dev = (fd_dev_t *) se_dev->se_dev_su_ptr;
+ int bl = 0;
+
+ __fd_get_dev_info(fd_dev, page, &bl);
+ return (ssize_t)bl;
+}
+
+void fd_get_plugin_info(void *p, char *b, int *bl)
+{
+ *bl += sprintf(b + *bl, "TCM FILEIO Plugin %s\n", FD_VERSION);
+}
+
+void fd_get_hba_info(se_hba_t *hba, char *b, int *bl)
+{
+ fd_host_t *fd_host = (fd_host_t *)hba->hba_ptr;
+
+ *bl += sprintf(b + *bl, "SE Host ID: %u FD Host ID: %u\n",
+ hba->hba_id, fd_host->fd_host_id);
+ *bl += sprintf(b + *bl, " TCM FILEIO HBA\n");
+}
+
+void fd_get_dev_info(se_device_t *dev, char *b, int *bl)
+{
+ fd_dev_t *fd_dev = (fd_dev_t *) dev->dev_ptr;
+
+ __fd_get_dev_info(fd_dev, b, bl);
+}
+
+void __fd_get_dev_info(fd_dev_t *fd_dev, char *b, int *bl)
+{
+ *bl += sprintf(b + *bl, "TCM FILEIO ID: %u", fd_dev->fd_dev_id);
+ *bl += sprintf(b + *bl, " File: %s Size: %llu ",
+ fd_dev->fd_dev_name, fd_dev->fd_dev_size);
+
+ if (fd_dev->fd_bd) {
+ struct block_device *bd = fd_dev->fd_bd;
+
+ *bl += sprintf(b + *bl, "%s\n",
+ (!bd->bd_contains) ? "" :
+ (bd->bd_holder == (fd_dev_t *)fd_dev) ?
+ "CLAIMED: FILEIO" : "CLAIMED: OS");
+ } else
+ *bl += sprintf(b + *bl, "\n");
+}
+
+/* fd_map_task_non_SG():
+ *
+ *
+ */
+void fd_map_task_non_SG(se_task_t *task)
+{
+ se_cmd_t *cmd = TASK_CMD(task);
+ fd_request_t *req = (fd_request_t *) task->transport_req;
+
+ req->fd_bufflen = task->task_size;
+ req->fd_buf = (void *) T_TASK(cmd)->t_task_buf;
+ req->fd_sg_count = 0;
+}
+
+/* fd_map_task_SG():
+ *
+ *
+ */
+void fd_map_task_SG(se_task_t *task)
+{
+ fd_request_t *req = (fd_request_t *) task->transport_req;
+
+ req->fd_bufflen = task->task_size;
+ req->fd_buf = NULL;
+ req->fd_sg_count = task->task_sg_num;
+}
+
+/* fd_CDB_inquiry():
+ *
+ *
+ */
+int fd_CDB_inquiry(se_task_t *task, u32 size)
+{
+ fd_request_t *req = (fd_request_t *) task->transport_req;
+
+ req->fd_data_direction = FD_DATA_READ;
+ fd_map_task_non_SG(task);
+
+ return 0;
+}
+
+/* fd_CDB_none():
+ *
+ *
+ */
+int fd_CDB_none(se_task_t *task, u32 size)
+{
+ fd_request_t *req = (fd_request_t *) task->transport_req;
+
+ req->fd_data_direction = FD_DATA_NONE;
+ req->fd_bufflen = 0;
+ req->fd_sg_count = 0;
+ req->fd_buf = NULL;
+
+ return 0;
+}
+
+/* fd_CDB_read_non_SG():
+ *
+ *
+ */
+int fd_CDB_read_non_SG(se_task_t *task, u32 size)
+{
+ fd_request_t *req = (fd_request_t *) task->transport_req;
+
+ req->fd_data_direction = FD_DATA_READ;
+ fd_map_task_non_SG(task);
+
+ return 0;
+}
+
+/* fd_CDB_read_SG):
+ *
+ *
+ */
+int fd_CDB_read_SG(se_task_t *task, u32 size)
+{
+ fd_request_t *req = (fd_request_t *) task->transport_req;
+
+ req->fd_data_direction = FD_DATA_READ;
+ fd_map_task_SG(task);
+
+ return req->fd_sg_count;
+}
+
+/* fd_CDB_write_non_SG():
+ *
+ *
+ */
+int fd_CDB_write_non_SG(se_task_t *task, u32 size)
+{
+ fd_request_t *req = (fd_request_t *) task->transport_req;
+
+ req->fd_data_direction = FD_DATA_WRITE;
+ fd_map_task_non_SG(task);
+
+ return 0;
+}
+
+/* fd_CDB_write_SG():
+ *
+ *
+ */
+int fd_CDB_write_SG(se_task_t *task, u32 size)
+{
+ fd_request_t *req = (fd_request_t *) task->transport_req;
+
+ req->fd_data_direction = FD_DATA_WRITE;
+ fd_map_task_SG(task);
+
+ return req->fd_sg_count;
+}
+
+/* fd_check_lba():
+ *
+ *
+ */
+int fd_check_lba(unsigned long long lba, se_device_t *dev)
+{
+ return 0;
+}
+
+/* fd_check_for_SG(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+int fd_check_for_SG(se_task_t *task)
+{
+ fd_request_t *req = (fd_request_t *) task->transport_req;
+
+ return req->fd_sg_count;
+}
+
+/* fd_get_cdb(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+unsigned char *fd_get_cdb(se_task_t *task)
+{
+ fd_request_t *req = (fd_request_t *) task->transport_req;
+
+ return req->fd_scsi_cdb;
+}
+
+/* fd_get_blocksize(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+u32 fd_get_blocksize(se_device_t *dev)
+{
+ return FD_BLOCKSIZE;
+}
+
+/* fd_get_device_rev(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+u32 fd_get_device_rev(se_device_t *dev)
+{
+ return SCSI_SPC_2; /* Returns SPC-3 in Initiator Data */
+}
+
+/* fd_get_device_type(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+u32 fd_get_device_type(se_device_t *dev)
+{
+ return TYPE_DISK;
+}
+
+/* fd_get_dma_length(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+u32 fd_get_dma_length(u32 task_size, se_device_t *dev)
+{
+ return PAGE_SIZE;
+}
+
+/* fd_get_max_sectors(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+u32 fd_get_max_sectors(se_device_t *dev)
+{
+ return FD_MAX_SECTORS;
+}
+
+/* fd_get_queue_depth(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+u32 fd_get_queue_depth(se_device_t *dev)
+{
+ return FD_DEVICE_QUEUE_DEPTH;
+}
+
+u32 fd_get_max_queue_depth(se_device_t *dev)
+{
+ return FD_MAX_DEVICE_QUEUE_DEPTH;
+}
diff --git a/include/target/target_core_file.h b/include/target/target_core_file.h
new file mode 100644
index 0000000..1f299e3
--- /dev/null
+++ b/include/target/target_core_file.h
@@ -0,0 +1,220 @@
+/*******************************************************************************
+ * Filename: target_core_file.h
+ *
+ * This file contains the Storage Engine <-> FILEIO transport specific
+ * definitions and prototypes.
+ *
+ * Copyright (c) 2005 PyX Technologies, Inc.
+ * Copyright (c) 2006 SBE, Inc. All Rights Reserved.
+ * Copyright (c) 2007-2009 Rising Tide Software, Inc.
+ * Copyright (c) 2008-2009 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@...nel.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.
+ *
+ ******************************************************************************/
+
+
+#ifndef TARGET_CORE_FILE_H
+#define TARGET_CORE_FILE_H
+
+#define FD_VERSION "3.1"
+
+#define FD_MAX_DEV_NAME 256
+/* Maximum queuedepth for the FILEIO HBA */
+#define FD_HBA_QUEUE_DEPTH 256
+#define FD_DEVICE_QUEUE_DEPTH 32
+#define FD_MAX_DEVICE_QUEUE_DEPTH 128
+#define FD_BLOCKSIZE 512
+#define FD_MAX_SECTORS 1024
+
+#define FD_DATA_READ 1
+#define FD_DATA_WRITE 2
+#define FD_DATA_NONE 3
+
+extern se_global_t *se_global;
+extern struct block_device *__linux_blockdevice_claim(int, int, void *, int *);
+extern struct block_device *linux_blockdevice_claim(int, int, void *);
+extern int linux_blockdevice_release(int, int, struct block_device *);
+extern int linux_blockdevice_check(int, int);
+
+#ifndef FD_INCLUDE_STRUCTS
+extern int fd_CDB_inquiry(se_task_t *, u32);
+extern int fd_CDB_none(se_task_t *, u32);
+extern int fd_CDB_read_non_SG(se_task_t *, u32);
+extern int fd_CDB_read_SG(se_task_t *, u32);
+extern int fd_CDB_write_non_SG(se_task_t *, u32);
+extern int fd_CDB_write_SG(se_task_t *, u32);
+
+extern int fd_attach_hba(se_hba_t *, u32);
+extern int fd_detach_hba(se_hba_t *);
+extern int fd_claim_phydevice(se_hba_t *, se_device_t *);
+extern int fd_release_phydevice(se_device_t *);
+extern void *fd_allocate_virtdevice(se_hba_t *, const char *);
+extern se_device_t *fd_create_virtdevice(se_hba_t *, se_subsystem_dev_t *,
+ void *);
+extern int fd_activate_device(se_device_t *);
+extern void fd_deactivate_device(se_device_t *);
+extern void fd_free_device(void *);
+extern int fd_transport_complete(se_task_t *);
+extern void *fd_allocate_request(se_task_t *, se_device_t *);
+extern int fd_do_task(se_task_t *);
+extern void fd_free_task(se_task_t *);
+extern ssize_t fd_set_configfs_dev_params(se_hba_t *, se_subsystem_dev_t *,
+ const char *, ssize_t);
+extern ssize_t fd_check_configfs_dev_params(se_hba_t *, se_subsystem_dev_t *);
+extern ssize_t fd_show_configfs_dev_params(se_hba_t *, se_subsystem_dev_t *,
+ char *);
+extern void fd_get_plugin_info(void *, char *, int *);
+extern void fd_get_hba_info(se_hba_t *, char *, int *);
+extern void fd_get_dev_info(se_device_t *, char *, int *);
+extern int fd_check_lba(unsigned long long, se_device_t *);
+extern int fd_check_for_SG(se_task_t *);
+extern unsigned char *fd_get_cdb(se_task_t *);
+extern u32 fd_get_blocksize(se_device_t *);
+extern u32 fd_get_device_rev(se_device_t *);
+extern u32 fd_get_device_type(se_device_t *);
+extern u32 fd_get_dma_length(u32, se_device_t *);
+extern u32 fd_get_max_sectors(se_device_t *);
+extern u32 fd_get_queue_depth(se_device_t *);
+extern u32 fd_get_max_queue_depth(se_device_t *);
+#endif /* ! FD_INCLUDE_STRUCTS */
+
+#define RRF_EMULATE_CDB 0x01
+#define RRF_GOT_LBA 0x02
+
+typedef struct fd_request_s {
+ /* SCSI CDB from iSCSI Command PDU */
+ unsigned char fd_scsi_cdb[SCSI_CDB_SIZE];
+ /* Data Direction */
+ u8 fd_data_direction;
+ /* Total length of request */
+ u32 fd_bufflen;
+ /* RD request flags */
+ u32 fd_req_flags;
+ /* Offset from start of page */
+ u32 fd_offset;
+ u32 fd_cur_size;
+ u32 fd_cur_offset;
+ /* Scatterlist count */
+ u32 fd_sg_count;
+ /* Logical Block Address */
+ unsigned long long fd_lba;
+ u64 fd_size;
+ struct kiocb fd_iocb;
+ struct iovec *fd_iovs;
+ /* Data buffer containing scatterlists(s) or contingous
+ memory segments */
+ void *fd_buf;
+ /* FILEIO device */
+ struct fd_dev_s *fd_dev;
+} ____cacheline_aligned fd_request_t;
+
+typedef struct fd_dev_sg_table_s {
+ u32 page_start_offset;
+ u32 page_end_offset;
+ u32 fd_sg_count;
+ struct scatterlist *sg_table;
+} ____cacheline_aligned fd_dev_sg_table_t;
+
+#define FBDF_HAS_PATH 0x01
+#define FBDF_HAS_SIZE 0x02
+
+typedef struct fd_dev_s {
+ u32 fbd_flags;
+ unsigned char fd_dev_name[FD_MAX_DEV_NAME];
+ int fd_claim_bd;
+ int fd_major;
+ int fd_minor;
+ /* Unique Ramdisk Device ID in Ramdisk HBA */
+ u32 fd_dev_id;
+ /* Number of SG tables in sg_table_array */
+ u32 fd_table_count;
+ u32 fd_queue_depth;
+ unsigned long long fd_dev_size;
+ struct file *fd_file;
+ struct block_device *fd_bd;
+ /* FILEIO HBA device is connected to */
+ struct fd_host_s *fd_host;
+ /* Next FILEIO Device entry in list */
+ struct fd_dev_s *next;
+} ____cacheline_aligned fd_dev_t;
+
+extern void __fd_get_dev_info(struct fd_dev_s *, char *, int *);
+
+typedef struct fd_host_s {
+ u32 fd_host_dev_id_count;
+ /* Unique FILEIO Host ID */
+ u32 fd_host_id;
+} ____cacheline_aligned fd_host_t;
+
+#ifndef FD_INCLUDE_STRUCTS
+/*
+ * We use the generic command sequencer, so we must setup
+ * se_subsystem_spc_t.
+ */
+se_subsystem_spc_t fileio_template_spc = {
+ .inquiry = fd_CDB_inquiry,
+ .none = fd_CDB_none,
+ .read_non_SG = fd_CDB_read_non_SG,
+ .read_SG = fd_CDB_read_SG,
+ .write_non_SG = fd_CDB_write_non_SG,
+ .write_SG = fd_CDB_write_SG,
+};
+
+/*#warning FIXME v2.8: transport_type for FILEIO will need to change
+ with DIRECT_IO to blockdevs */
+
+se_subsystem_api_t fileio_template = {
+ .name = "fileio",
+ .type = FILEIO,
+ .transport_type = TRANSPORT_PLUGIN_VHBA_PDEV,
+ .attach_hba = fd_attach_hba,
+ .detach_hba = fd_detach_hba,
+ .claim_phydevice = fd_claim_phydevice,
+ .release_phydevice = fd_release_phydevice,
+ .allocate_virtdevice = fd_allocate_virtdevice,
+ .create_virtdevice = fd_create_virtdevice,
+ .activate_device = fd_activate_device,
+ .deactivate_device = fd_deactivate_device,
+ .free_device = fd_free_device,
+ .transport_complete = fd_transport_complete,
+ .allocate_request = fd_allocate_request,
+ .do_task = fd_do_task,
+ .free_task = fd_free_task,
+ .check_configfs_dev_params = fd_check_configfs_dev_params,
+ .set_configfs_dev_params = fd_set_configfs_dev_params,
+ .show_configfs_dev_params = fd_show_configfs_dev_params,
+ .get_plugin_info = fd_get_plugin_info,
+ .get_hba_info = fd_get_hba_info,
+ .get_dev_info = fd_get_dev_info,
+ .check_lba = fd_check_lba,
+ .check_for_SG = fd_check_for_SG,
+ .get_cdb = fd_get_cdb,
+ .get_blocksize = fd_get_blocksize,
+ .get_device_rev = fd_get_device_rev,
+ .get_device_type = fd_get_device_type,
+ .get_dma_length = fd_get_dma_length,
+ .get_max_sectors = fd_get_max_sectors,
+ .get_queue_depth = fd_get_queue_depth,
+ .get_max_queue_depth = fd_get_max_queue_depth,
+ .write_pending = NULL,
+ .spc = &fileio_template_spc,
+};
+
+#endif /* ! FD_INCLUDE_STRUCTS */
+
+#endif /* TARGET_CORE_FILE_H */
--
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