open-osd: OSD Initiator library for 2.6.30

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index b625ee5..cde65ca 100644
@@ -24,8 +24,6 @@
 
 enum { OSD_TEST_ALL = 17 };
 
-#ifdef __KERNEL__
-extern int do_test_17(struct osd_dev *od);
-#endif /* __KERNEL__ */
+int do_test_17(struct osd_dev *od, unsigned cmd, unsigned long arg);
 
 #endif /*ndef __OSD_KTESTS_H__*/

62 lines not on this page · raw message

index 83b6976..b24d961 100644
@@ -58,6 +58,11 @@ struct osd_dev {
 struct osd_dev *osduld_path_lookup(const char *dev_name); /*Use IS_ERR/ERR_PTR*/
 void osduld_put_device(struct osd_dev *od);
 
+/* Add/remove test ioctls from external modules */
+typedef int (do_test_fn)(struct osd_dev *od, unsigned cmd, unsigned long arg);
+int osduld_register_test(unsigned ioctl, do_test_fn *do_test);
+void osduld_unregister_test(unsigned ioctl);
+
 /* These are called by uld at probe time */
 void osd_dev_init(struct osd_dev *od, struct scsi_device *scsi_device);
 void osd_dev_fini(struct osd_dev *od);

index 8824945..058ec15 100644
@@ -171,5 +171,6 @@
 #define VIOTAPE_MAJOR		230
 
 #define BLOCK_EXT_MAJOR		259
+#define SCSI_OSD_MAJOR		260	/* open-osd's OSD scsi device */
 
 #endif

index 66505bb..be01089 100644
@@ -796,6 +796,7 @@ static int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result,
 	case TYPE_ENCLOSURE:
 	case TYPE_COMM:
 	case TYPE_RAID:
+	case TYPE_OSD:
 		sdev->writeable = 1;
 		break;
 	case TYPE_ROM:

index a109165..de1cef2 100644
@@ -263,6 +263,7 @@ static inline int scsi_status_is_good(int status)
 #define TYPE_RAID           0x0c
 #define TYPE_ENCLOSURE      0x0d    /* Enclosure Services Device */
 #define TYPE_RBC	    0x0e
+#define TYPE_OSD            0x11
 #define TYPE_NO_LUN         0x7f
 
 /* SCSI protocols; these are taken from SPC-3 section 7.5 */

new file mode 100644
index 0000000..1d92247
@@ -0,0 +1,332 @@
+/*
+ * osd_initiator.h - OSD initiator API definition
+ *
+ * Copyright (C) 2008 Panasas Inc.  All rights reserved.
+ *
+ * Authors:
+ *   Boaz Harrosh <[email protected]>
+ *   Benny Halevy <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ *
+ */
+#ifndef __OSD_INITIATOR_H__
+#define __OSD_INITIATOR_H__
+
+#include "osd_protocol.h"
+#include "osd_types.h"
+
+#include <linux/blkdev.h>
+
+/* Note: "NI" in comments below means "Not Implemented yet" */
+
+/*
+ * Object-based Storage Device.
+ * This object represents an OSD device.
+ * It is not a full linux device in any way. It is only
+ * a place to hang resources associated with a Linux
+ * request Q and some default properties.
+ */
+struct osd_dev {
+	struct scsi_device *scsi_device;
+	unsigned def_timeout;
+};
+
+void osd_dev_init(struct osd_dev *od, struct scsi_device *scsi_device);
+void osd_dev_fini(struct osd_dev *od);
+
+struct osd_request;
+typedef void (osd_req_done_fn)(struct osd_request *or, void *private);
+
+struct osd_request {
+	struct osd_cdb cdb;
+	struct osd_data_out_integrity_info out_data_integ;
+	struct osd_data_in_integrity_info in_data_integ;
+
+	struct osd_dev *osd_dev;
+	struct request *request;
+
+	struct _osd_req_data_segment {
+		void *buff;
+		unsigned alloc_size; /* 0 here means: don't call kfree */
+		unsigned total_bytes;
+	} set_attr, enc_get_attr, get_attr;
+
+	struct _osd_io_info {
+		struct bio *bio;
+		u64 total_bytes;
+		struct request *req;
+		struct _osd_req_data_segment *last_seg;
+		u8 *pad_buff;
+	} out, in;
+
+	gfp_t alloc_flags;
+	unsigned timeout;
+	unsigned retries;
+	u8 sense[OSD_MAX_SENSE_LEN];
+	enum osd_attributes_mode attributes_mode;
+
+	osd_req_done_fn *async_done;
+	void *async_private;
+	int async_error;
+};
+
+/*
+ * How to use the osd library:
+ *
+ * osd_start_request
+ *	Allocates a request.
+ *
+ * osd_req_*
+ *	Call one of, to encode the desired operation.
+ *
+ * osd_add_{get,set}_attr
+ *	Optionally add attributes to the CDB, list or page mode.
+ *
+ * osd_finalize_request
+ *	Computes final data out/in offsets and signs the request,
+ *	making it ready for execution.
+ *
+ * osd_execute_request
+ *	May be called to execute it through the block layer. Other wise submit
+ *	the associated block request in some other way.
+ *
+ * After execution:
+ * osd_req_decode_sense
+ *	Decodes sense information to verify execution results.
+ *
+ * osd_req_decode_get_attr
+ *	Retrieve osd_add_get_attr_list() values if used.
+ *
+ * osd_end_request
+ *	Must be called to deallocate the request.
+ */
+
+/**
+ * osd_start_request - Allocate and initialize an osd_request
+ *
+ * @osd_dev:    OSD device that holds the scsi-device and default values
+ *              that the request is associated with.
+ * @gfp:        The allocation flags to use for request allocation, and all
+ *              subsequent allocations. This will be stored at
+ *              osd_request->alloc_flags, can be changed by user later
+ *
+ * Allocate osd_request and initialize all members to the
+ * default/initial state.
+ */
+struct osd_request *osd_start_request(struct osd_dev *od, gfp_t gfp);
+
+enum osd_req_options {
+	OSD_REQ_FUA = 0x08,	/* Force Unit Access */
+	OSD_REQ_DPO = 0x10,	/* Disable Page Out */
+
+	OSD_REQ_BYPASS_TIMESTAMPS = 0x80,
+};
+
+/**
+ * osd_finalize_request - Sign request and prepare request for execution
+ *
+ * @or:		osd_request to prepare
+ * @options:	combination of osd_req_options bit flags or 0.
+ * @cap:	A Pointer to an OSD_CAP_LEN bytes buffer that is received from
+ *              The security manager as capabilities for this cdb.
+ * @cap_key:	The cryptographic key used to sign the cdb/data. Can be null
+ *              if NOSEC is used.
+ *
+ * The actual request and bios are only allocated here, so are the get_attr
+ * buffers that will receive the returned attributes. Copy's @cap to cdb.
+ * Sign the cdb/data with @cap_key.
+ */
+int osd_finalize_request(struct osd_request *or,
+	u8 options, const void *cap, const u8 *cap_key);
+
+/**
+ * osd_execute_request - Execute the request synchronously through block-layer
+ *
+ * @or:		osd_request to Executed
+ *
+ * Calls blk_execute_rq to q the command and waits for completion.
+ */
+int osd_execute_request(struct osd_request *or);
+
+/**
+ * osd_execute_request_async - Execute the request without waitting.
+ *
+ * @or:                      - osd_request to Executed
+ * @done: (Optional)         - Called at end of execution
+ * @private:                 - Will be passed to @done function
+ *
+ * Calls blk_execute_rq_nowait to queue the command. When execution is done
+ * optionally calls @done with @private as parameter. @or->async_error will
+ * have the return code
+ */
+int osd_execute_request_async(struct osd_request *or,
+	osd_req_done_fn *done, void *private);
+
+/**
+ * osd_end_request - return osd_request to free store
+ *
+ * @or:		osd_request to free
+ *
+ * Deallocate all osd_request resources (struct req's, BIOs, buffers, etc.)
+ */
+void osd_end_request(struct osd_request *or);
+
+/*
+ * CDB Encoding
+ *
+ * Note: call only one of the following methods.
+ */
+
+/*
+ * Device commands
+ */
+void osd_req_set_master_seed_xchg(struct osd_request *or, ...);/* NI */
+void osd_req_set_master_key(struct osd_request *or, ...);/* NI */
+
+void osd_req_format(struct osd_request *or, u64 tot_capacity);
+
+/* list all partitions
+ * @list header must be initialized to zero on first run.
+ *
+ * Call osd_is_obj_list_done() to find if we got the complete list.
+ */
+int osd_req_list_dev_partitions(struct osd_request *or,
+	osd_id initial_id, struct osd_obj_id_list *list, unsigned nelem);
+
+void osd_req_flush_obsd(struct osd_request *or,
+	enum osd_options_flush_scope_values);
+
+void osd_req_perform_scsi_command(struct osd_request *or,
+	const u8 *cdb, ...);/* NI */
+void osd_req_task_management(struct osd_request *or, ...);/* NI */
+
+/*
+ * Partition commands
+ */
+void osd_req_create_partition(struct osd_request *or, osd_id partition);
+void osd_req_remove_partition(struct osd_request *or, osd_id partition);
+
+void osd_req_set_partition_key(struct osd_request *or,
+	osd_id partition, u8 new_key_id[OSD_CRYPTO_KEYID_SIZE],
+	u8 seed[OSD_CRYPTO_SEED_SIZE]);/* NI */
+
+/* list all collections in the partition
+ * @list header must be init to zero on first run.
+ *
+ * Call osd_is_obj_list_done() to find if we got the complete list.
+ */
+int osd_req_list_partition_collections(struct osd_request *or,
+	osd_id partition, osd_id initial_id, struct osd_obj_id_list *list,
+	unsigned nelem);
+
+/* list all objects in the partition
+ * @list header must be init to zero on first run.
+ *
+ * Call osd_is_obj_list_done() to find if we got the complete list.
+ */
+int osd_req_list_partition_objects(struct osd_request *or,
+	osd_id partition, osd_id initial_id, struct osd_obj_id_list *list,
+	unsigned nelem);
+
+void osd_req_flush_partition(struct osd_request *or,
+	osd_id partition, enum osd_options_flush_scope_values);
+
+/*
+ * Collection commands
+ */
+void osd_req_create_collection(struct osd_request *or,
+	const struct osd_obj_id *);/* NI */
+void osd_req_remove_collection(struct osd_request *or,
+	const struct osd_obj_id *);/* NI */
+
+/* list all objects in the collection */
+int osd_req_list_collection_objects(struct osd_request *or,
+	const struct osd_obj_id *, osd_id initial_id,
+	struct osd_obj_id_list *list, unsigned nelem);
+
+/* V2 only filtered list of objects in the collection */
+void osd_req_query(struct osd_request *or, ...);/* NI */
+
+void osd_req_flush_collection(struct osd_request *or,
+	const struct osd_obj_id *, enum osd_options_flush_scope_values);
+
+void osd_req_get_member_attrs(struct osd_request *or, ...);/* V2-only NI */
+void osd_req_set_member_attrs(struct osd_request *or, ...);/* V2-only NI */
+
+/*
+ * Object commands
+ */
+void osd_req_create_object(struct osd_request *or, struct osd_obj_id *);
+void osd_req_remove_object(struct osd_request *or, struct osd_obj_id *);
+
+void osd_req_write(struct osd_request *or,
+	const struct osd_obj_id *, struct bio *data_out, u64 offset);
+void osd_req_append(struct osd_request *or,
+	const struct osd_obj_id *, struct bio *data_out);/* NI */
+void osd_req_create_write(struct osd_request *or,
+	const struct osd_obj_id *, struct bio *data_out, u64 offset);/* NI */
+void osd_req_clear(struct osd_request *or,
+	const struct osd_obj_id *, u64 offset, u64 len);/* NI */
+void osd_req_punch(struct osd_request *or,
+	const struct osd_obj_id *, u64 offset, u64 len);/* V2-only NI */
+
+void osd_req_flush_object(struct osd_request *or,
+	const struct osd_obj_id *, enum osd_options_flush_scope_values,
+	/*V2*/ u64 offset, /*V2*/ u64 len);
+
+void osd_req_read(struct osd_request *or,
+	const struct osd_obj_id *, struct bio *data_in, u64 offset);
+
+/*
+ * Root/Partition/Collection/Object Attributes commands
+ */
+
+/* get before set */
+void osd_req_get_attributes(struct osd_request *or, const struct osd_obj_id *);
+
+/* set before get */
+void osd_req_set_attributes(struct osd_request *or, const struct osd_obj_id *);
+
+/*
+ * Attributes appended to most commands
+ */
+
+/* Attributes List mode (or V2 CDB) */
+  /*
+   * TODO: In ver2 if at finalize time only one attr was set and no gets,
+   * then the Attributes CDB mode is used automatically to save IO.
+   */
+
+/* set a list of attributes. */
+int osd_req_add_set_attr_list(struct osd_request *or,
+	const struct osd_attr *, unsigned nelem);
+
+/* get a list of attributes */
+int osd_req_add_get_attr_list(struct osd_request *or,
+	const struct osd_attr *, unsigned nelem);
+
+/*
+ * Attributes list decoding
+ * Must be called after osd_request.request was executed
+ * It is called in a loop to decode the returned get_attr
+ * (see osd_add_get_attr)
+ */
+int osd_req_decode_get_attr_list(struct osd_request *or,
+	struct osd_attr *, int *nelem, void **iterator);
+
+/* Attributes Page mode */
+
+/*
+ * Read an attribute page and optionally set one attribute
+ *
+ * Retrieves the attribute page directly to a user buffer.
+ * @attr_page_data shall stay valid until end of execution.
+ * See osd_attributes.h for common page structures
+ */
+int osd_req_add_get_attr_page(struct osd_request *or,
+	u32 page_id, void *attr_page_data, unsigned max_page_len,
+	const struct osd_attr *set_one);
+
+#endif /* __OSD_LIB_H__ */

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new file mode 100644
index 0000000..3f5e88c
@@ -0,0 +1,40 @@
+/*
+ * osd_types.h - Types and constants which are not part of the protocol.
+ *
+ * Copyright (C) 2008 Panasas Inc.  All rights reserved.
+ *
+ * Authors:
+ *   Boaz Harrosh <[email protected]>
+ *   Benny Halevy <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ *
+ * Contains types and constants that are implementation specific and are
+ * used by more than one part of the osd library.
+ *     (Eg initiator/target/security_manager/...)
+ */
+#ifndef __OSD_TYPES_H__
+#define __OSD_TYPES_H__
+
+struct osd_systemid {
+	u8 data[OSD_SYSTEMID_LEN];
+};
+
+typedef u64 __bitwise osd_id;
+
+struct osd_obj_id {
+	osd_id partition;
+	osd_id id;
+};
+
+static const struct __weak osd_obj_id osd_root_object = {0, 0};
+
+struct osd_attr {
+	u32 attr_page;
+	u32 attr_id;
+	u16 len;		/* byte count of operand */
+	void *val_ptr;		/* in network order */
+};
+
+#endif /* ndef __OSD_TYPES_H__ */

new file mode 100644
index 0000000..579e491
@@ -0,0 +1,30 @@
+/*
+ * osd_debug.h - Some kprintf macros
+ *
+ * Copyright (C) 2008 Panasas Inc.  All rights reserved.
+ *
+ * Authors:
+ *   Boaz Harrosh <[email protected]>
+ *   Benny Halevy <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ *
+ */
+#ifndef __OSD_DEBUG_H__
+#define __OSD_DEBUG_H__
+
+#define OSD_ERR(fmt, a...) printk(KERN_ERR "osd: " fmt, ##a)
+#define OSD_INFO(fmt, a...) printk(KERN_NOTICE "osd: " fmt, ##a)
+
+#ifdef CONFIG_SCSI_OSD_DEBUG
+#define OSD_DEBUG(fmt, a...) \
+	printk(KERN_NOTICE "osd @%s:%d: " fmt, __func__, __LINE__, ##a)
+#else
+#define OSD_DEBUG(fmt, a...) do {} while (0)
+#endif
+
+/* u64 has problems with printk this will cast it to unsigned long long */
+#define _LLU(x) (unsigned long long)(x)
+
+#endif /* ndef __OSD_DEBUG_H__ */

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index 1d92247..a5dbbdd 100644
@@ -33,6 +33,12 @@ struct osd_dev {
 	unsigned def_timeout;
 };
 
+/* Add/remove test ioctls from external modules */
+typedef int (do_test_fn)(struct osd_dev *od, unsigned cmd, unsigned long arg);
+int osduld_register_test(unsigned ioctl, do_test_fn *do_test);
+void osduld_unregister_test(unsigned ioctl);
+
+/* These are called by uld at probe time */
 void osd_dev_init(struct osd_dev *od, struct scsi_device *scsi_device);
 void osd_dev_fini(struct osd_dev *od);
 

index f6f9a99..cd4ca7c 100644
@@ -173,6 +173,69 @@ static const struct file_operations osd_fops = {
 	.unlocked_ioctl = osd_uld_ioctl,
 };
 
+struct osd_dev *osduld_path_lookup(const char *path)
+{
+	struct nameidata nd;
+	struct inode *inode;
+	struct cdev *cdev;
+	struct osd_uld_device *uninitialized_var(oud);
+	int error;
+
+	if (!path || !*path) {
+		OSD_ERR("Mount with !path || !*path\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	error = path_lookup(path, LOOKUP_FOLLOW, &nd);
+	if (error) {
+		OSD_ERR("path_lookup of %s faild=>%d\n", path, error);
+		return ERR_PTR(error);
+	}
+
+	inode = nd.path.dentry->d_inode;
+	error = -EINVAL; /* Not the right device e.g osd_uld_device */
+	if (!S_ISCHR(inode->i_mode)) {
+		OSD_DEBUG("!S_ISCHR()\n");
+		goto out;
+	}
+
+	cdev = inode->i_cdev;
+	if (!cdev) {
+		OSD_ERR("Before mounting an OSD Based filesystem\n");
+		OSD_ERR("  user-mode must open+close the %s device\n", path);
+		OSD_ERR("  Example: bash: echo < %s\n", path);
+		goto out;
+	}
+
+	/* The Magic wand. Is it our char-dev */
+	/* TODO: Support sg devices */
+	if (cdev->owner != THIS_MODULE) {
+		OSD_ERR("Error mounting %s - is not an OSD device\n", path);
+		goto out;
+	}
+
+	oud = container_of(cdev, struct osd_uld_device, cdev);
+
+	__uld_get(oud);
+	error = 0;
+
+out:
+	path_put(&nd.path);
+	return error ? ERR_PTR(error) : &oud->od;
+}
+EXPORT_SYMBOL(osduld_path_lookup);
+
+void osduld_put_device(struct osd_dev *od)
+{
+	if (od) {
+		struct osd_uld_device *oud = container_of(od,
+						struct osd_uld_device, od);
+
+		__uld_put(oud);
+	}
+}
+EXPORT_SYMBOL(osduld_put_device);
+
 /*
  * Scsi Device operations
  */

index a5dbbdd..e84dc7a 100644
@@ -33,6 +33,10 @@ struct osd_dev {
 	unsigned def_timeout;
 };
 
+/* Retrieve/return osd_dev(s) for use by Kernel clients */
+struct osd_dev *osduld_path_lookup(const char *dev_name); /*Use IS_ERR/ERR_PTR*/
+void osduld_put_device(struct osd_dev *od);
+
 /* Add/remove test ioctls from external modules */
 typedef int (do_test_fn)(struct osd_dev *od, unsigned cmd, unsigned long arg);
 int osduld_register_test(unsigned ioctl, do_test_fn *do_test);

index 0e6d906..b982d76 100644
@@ -45,6 +45,10 @@
 
 #include "osd_debug.h"
 
+#ifndef __unused
+#    define __unused			__attribute__((unused))
+#endif
+
 enum { OSD_REQ_RETRIES = 1 };
 
 MODULE_AUTHOR("Boaz Harrosh <[email protected]>");

@@ -63,6 +67,50 @@ static unsigned _osd_req_cdb_len(struct osd_request *or)
 	return OSDv1_TOTAL_CDB_LEN;
 }
 
+static unsigned _osd_req_alist_elem_size(struct osd_request *or, unsigned len)
+{
+	return osdv1_attr_list_elem_size(len);
+}
+
+static unsigned _osd_req_alist_size(struct osd_request *or, void *list_head)
+{
+	return osdv1_list_size(list_head);
+}
+
+static unsigned _osd_req_sizeof_alist_header(struct osd_request *or)
+{
+	return sizeof(struct osdv1_attributes_list_header);
+}
+
+static void _osd_req_set_alist_type(struct osd_request *or,
+	void *list, int list_type)
+{
+	struct osdv1_attributes_list_header *attr_list = list;
+
+	memset(attr_list, 0, sizeof(*attr_list));
+	attr_list->type = list_type;
+}
+
+static bool _osd_req_is_alist_type(struct osd_request *or,
+	void *list, int list_type)
+{
+	if (!list)
+		return false;
+
+	if (1) {
+		struct osdv1_attributes_list_header *attr_list = list;
+
+		return attr_list->type == list_type;
+	}
+}
+
+static osd_cdb_offset osd_req_encode_offset(struct osd_request *or,
+	u64 offset, unsigned *padding)
+{
+	return __osd_encode_offset(offset, padding,
+				  OSDv1_OFFSET_MIN_SHIFT, OSD_OFFSET_MAX_SHIFT);
+}
+
 void osd_dev_init(struct osd_dev *osdd, struct scsi_device *scsi_device)
 {
 	memset(osdd, 0, sizeof(*osdd));

@@ -125,10 +173,25 @@ static void _abort_unexecuted_bios(struct request *rq)
 	}
 }
 
+static void _osd_free_seg(struct osd_request *or __unused,
+	struct _osd_req_data_segment *seg)
+{
+	if (!seg->buff || !seg->alloc_size)
+		return;
+
+	kfree(seg->buff);
+	seg->buff = NULL;
+	seg->alloc_size = 0;
+}
+
 void osd_end_request(struct osd_request *or)
 {
 	struct request *rq = or->request;
 
+	_osd_free_seg(or, &or->set_attr);
+	_osd_free_seg(or, &or->enc_get_attr);
+	_osd_free_seg(or, &or->get_attr);
+
 	if (rq) {
 		if (rq->next_rq) {
 			_abort_unexecuted_bios(rq->next_rq);

@@ -176,6 +239,54 @@ int osd_execute_request_async(struct osd_request *or,
 }
 EXPORT_SYMBOL(osd_execute_request_async);
 
+u8 sg_out_pad_buffer[1 << OSDv1_OFFSET_MIN_SHIFT];
+u8 sg_in_pad_buffer[1 << OSDv1_OFFSET_MIN_SHIFT];
+
+static int _osd_realloc_seg(struct osd_request *or,
+	struct _osd_req_data_segment *seg, unsigned max_bytes)
+{
+	void *buff;
+
+	if (seg->alloc_size >= max_bytes)
+		return 0;
+
+	buff = krealloc(seg->buff, max_bytes, or->alloc_flags);
+	if (!buff) {
+		OSD_ERR("Failed to Realloc %d-bytes was-%d\n", max_bytes,
+			seg->alloc_size);
+		return -ENOMEM;
+	}
+
+	memset(buff + seg->alloc_size, 0, max_bytes - seg->alloc_size);
+	seg->buff = buff;
+	seg->alloc_size = max_bytes;
+	return 0;
+}
+
+static int _alloc_set_attr_list(struct osd_request *or,
+	const struct osd_attr *oa, unsigned nelem, unsigned add_bytes)
+{
+	unsigned total_bytes = add_bytes;
+
+	for (; nelem; --nelem, ++oa)
+		total_bytes += _osd_req_alist_elem_size(or, oa->len);
+
+	OSD_DEBUG("total_bytes=%d\n", total_bytes);
+	return _osd_realloc_seg(or, &or->set_attr, total_bytes);
+}
+
+static int _alloc_get_attr_desc(struct osd_request *or, unsigned max_bytes)
+{
+	OSD_DEBUG("total_bytes=%d\n", max_bytes);
+	return _osd_realloc_seg(or, &or->enc_get_attr, max_bytes);
+}
+
+static int _alloc_get_attr_list(struct osd_request *or)
+{
+	OSD_DEBUG("total_bytes=%d\n", or->get_attr.total_bytes);
+	return _osd_realloc_seg(or, &or->get_attr, or->get_attr.total_bytes);
+}
+
 /*
  * Common to all OSD commands
  */

@@ -284,6 +395,410 @@ void osd_req_read(struct osd_request *or,
 }
 EXPORT_SYMBOL(osd_req_read);
 
+void osd_req_get_attributes(struct osd_request *or,
+	const struct osd_obj_id *obj)
+{
+	_osd_req_encode_common(or, OSD_ACT_GET_ATTRIBUTES, obj, 0, 0);
+}
+EXPORT_SYMBOL(osd_req_get_attributes);
+
+void osd_req_set_attributes(struct osd_request *or,
+	const struct osd_obj_id *obj)
+{
+	_osd_req_encode_common(or, OSD_ACT_SET_ATTRIBUTES, obj, 0, 0);
+}
+EXPORT_SYMBOL(osd_req_set_attributes);
+
+/*
+ * Attributes List-mode
+ */
+
+int osd_req_add_set_attr_list(struct osd_request *or,
+	const struct osd_attr *oa, unsigned nelem)
+{
+	unsigned total_bytes = or->set_attr.total_bytes;
+	void *attr_last;
+	int ret;
+
+	if (or->attributes_mode &&
+	    or->attributes_mode != OSD_CDB_GET_SET_ATTR_LISTS) {
+		WARN_ON(1);
+		return -EINVAL;
+	}
+	or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
+
+	if (!total_bytes) { /* first-time: allocate and put list header */
+		total_bytes = _osd_req_sizeof_alist_header(or);
+		ret = _alloc_set_attr_list(or, oa, nelem, total_bytes);
+		if (ret)
+			return ret;
+		_osd_req_set_alist_type(or, or->set_attr.buff,
+					OSD_ATTR_LIST_SET_RETRIEVE);
+	}
+	attr_last = or->set_attr.buff + total_bytes;
+
+	for (; nelem; --nelem) {
+		struct osd_attributes_list_element *attr;
+		unsigned elem_size = _osd_req_alist_elem_size(or, oa->len);
+
+		total_bytes += elem_size;
+		if (unlikely(or->set_attr.alloc_size < total_bytes)) {
+			or->set_attr.total_bytes = total_bytes - elem_size;
+			ret = _alloc_set_attr_list(or, oa, nelem, total_bytes);
+			if (ret)
+				return ret;
+			attr_last =
+				or->set_attr.buff + or->set_attr.total_bytes;
+		}
+
+		attr = attr_last;
+		attr->attr_page = cpu_to_be32(oa->attr_page);
+		attr->attr_id = cpu_to_be32(oa->attr_id);
+		attr->attr_bytes = cpu_to_be16(oa->len);
+		memcpy(attr->attr_val, oa->val_ptr, oa->len);
+
+		attr_last += elem_size;
+		++oa;
+	}
+
+	or->set_attr.total_bytes = total_bytes;
+	return 0;
+}
+EXPORT_SYMBOL(osd_req_add_set_attr_list);
+
+static int _append_map_kern(struct request *req,
+	void *buff, unsigned len, gfp_t flags)
+{
+	struct bio *bio;
+	int ret;
+
+	bio = bio_map_kern(req->q, buff, len, flags);
+	if (IS_ERR(bio)) {
+		OSD_ERR("Failed bio_map_kern(%p, %d) => %ld\n", buff, len,
+			PTR_ERR(bio));
+		return PTR_ERR(bio);
+	}
+	ret = blk_rq_append_bio(req->q, req, bio);
+	if (ret) {
+		OSD_ERR("Failed blk_rq_append_bio(%p) => %d\n", bio, ret);
+		bio_put(bio);
+	}
+	return ret;
+}
+
+static int _req_append_segment(struct osd_request *or,
+	unsigned padding, struct _osd_req_data_segment *seg,
+	struct _osd_req_data_segment *last_seg, struct _osd_io_info *io)
+{
+	void *pad_buff;
+	int ret;
+
+	if (padding) {
+		/* check if we can just add it to last buffer */
+		if (last_seg &&
+		    (padding <= last_seg->alloc_size - last_seg->total_bytes))
+			pad_buff = last_seg->buff + last_seg->total_bytes;
+		else
+			pad_buff = io->pad_buff;
+
+		ret = _append_map_kern(io->req, pad_buff, padding,
+				       or->alloc_flags);
+		if (ret)
+			return ret;
+		io->total_bytes += padding;
+	}
+
+	ret = _append_map_kern(io->req, seg->buff, seg->total_bytes,
+			       or->alloc_flags);
+	if (ret)
+		return ret;
+
+	io->total_bytes += seg->total_bytes;
+	OSD_DEBUG("padding=%d buff=%p total_bytes=%d\n", padding, seg->buff,
+		  seg->total_bytes);
+	return 0;
+}
+
+static int _osd_req_finalize_set_attr_list(struct osd_request *or)
+{
+	struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
+	unsigned padding;
+	int ret;
+
+	if (!or->set_attr.total_bytes) {
+		cdbh->attrs_list.set_attr_offset = OSD_OFFSET_UNUSED;
+		return 0;
+	}
+
+	cdbh->attrs_list.set_attr_bytes = cpu_to_be32(or->set_attr.total_bytes);
+	cdbh->attrs_list.set_attr_offset =
+		osd_req_encode_offset(or, or->out.total_bytes, &padding);
+
+	ret = _req_append_segment(or, padding, &or->set_attr,
+				  or->out.last_seg, &or->out);
+	if (ret)
+		return ret;
+
+	or->out.last_seg = &or->set_attr;
+	return 0;
+}
+
+int osd_req_add_get_attr_list(struct osd_request *or,
+	const struct osd_attr *oa, unsigned nelem)
+{
+	unsigned total_bytes = or->enc_get_attr.total_bytes;
+	void *attr_last;
+	int ret;
+
+	if (or->attributes_mode &&
+	    or->attributes_mode != OSD_CDB_GET_SET_ATTR_LISTS) {
+		WARN_ON(1);
+		return -EINVAL;
+	}
+	or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
+
+	/* first time calc data-in list header size */
+	if (!or->get_attr.total_bytes)
+		or->get_attr.total_bytes = _osd_req_sizeof_alist_header(or);
+
+	/* calc data-out info */
+	if (!total_bytes) { /* first-time: allocate and put list header */
+		unsigned max_bytes;
+
+		total_bytes = _osd_req_sizeof_alist_header(or);
+		max_bytes = total_bytes +
+			nelem * sizeof(struct osd_attributes_list_attrid);
+		ret = _alloc_get_attr_desc(or, max_bytes);
+		if (ret)
+			return ret;
+
+		_osd_req_set_alist_type(or, or->enc_get_attr.buff,
+					OSD_ATTR_LIST_GET);
+	}
+	attr_last = or->enc_get_attr.buff + total_bytes;
+
+	for (; nelem; --nelem) {
+		struct osd_attributes_list_attrid *attrid;
+		const unsigned cur_size = sizeof(*attrid);
+
+		total_bytes += cur_size;
+		if (unlikely(or->enc_get_attr.alloc_size < total_bytes)) {
+			or->enc_get_attr.total_bytes = total_bytes - cur_size;
+			ret = _alloc_get_attr_desc(or,
+					total_bytes + nelem * sizeof(*attrid));
+			if (ret)
+				return ret;
+			attr_last = or->enc_get_attr.buff +
+				or->enc_get_attr.total_bytes;
+		}
+
+		attrid = attr_last;
+		attrid->attr_page = cpu_to_be32(oa->attr_page);
+		attrid->attr_id = cpu_to_be32(oa->attr_id);
+
+		attr_last += cur_size;
+
+		/* calc data-in size */
+		or->get_attr.total_bytes +=
+			_osd_req_alist_elem_size(or, oa->len);
+		++oa;
+	}
+
+	or->enc_get_attr.total_bytes = total_bytes;
+
+	OSD_DEBUG(
+	       "get_attr.total_bytes=%u(%u) enc_get_attr.total_bytes=%u(%Zu)\n",
+	       or->get_attr.total_bytes,
+	       or->get_attr.total_bytes - _osd_req_sizeof_alist_header(or),
+	       or->enc_get_attr.total_bytes,
+	       (or->enc_get_attr.total_bytes - _osd_req_sizeof_alist_header(or))
+			/ sizeof(struct osd_attributes_list_attrid));
+
+	return 0;
+}
+EXPORT_SYMBOL(osd_req_add_get_attr_list);
+
+static int _osd_req_finalize_get_attr_list(struct osd_request *or)
+{
+	struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
+	unsigned out_padding;
+	unsigned in_padding;
+	int ret;
+
+	if (!or->enc_get_attr.total_bytes) {
+		cdbh->attrs_list.get_attr_desc_offset = OSD_OFFSET_UNUSED;
+		cdbh->attrs_list.get_attr_offset = OSD_OFFSET_UNUSED;
+		return 0;
+	}
+
+	ret = _alloc_get_attr_list(or);
+	if (ret)
+		return ret;
+
+	/* The out-going buffer info update */
+	OSD_DEBUG("out-going\n");
+	cdbh->attrs_list.get_attr_desc_bytes =
+		cpu_to_be32(or->enc_get_attr.total_bytes);
+
+	cdbh->attrs_list.get_attr_desc_offset =
+		osd_req_encode_offset(or, or->out.total_bytes, &out_padding);
+
+	ret = _req_append_segment(or, out_padding, &or->enc_get_attr,
+				  or->out.last_seg, &or->out);
+	if (ret)
+		return ret;
+	or->out.last_seg = &or->enc_get_attr;
+
+	/* The incoming buffer info update */
+	OSD_DEBUG("in-coming\n");
+	cdbh->attrs_list.get_attr_alloc_length =
+		cpu_to_be32(or->get_attr.total_bytes);
+
+	cdbh->attrs_list.get_attr_offset =
+		osd_req_encode_offset(or, or->in.total_bytes, &in_padding);
+
+	ret = _req_append_segment(or, in_padding, &or->get_attr, NULL,
+				  &or->in);
+	if (ret)
+		return ret;
+	or->in.last_seg = &or->get_attr;
+
+	return 0;
+}
+
+int osd_req_decode_get_attr_list(struct osd_request *or,
+	struct osd_attr *oa, int *nelem, void **iterator)
+{
+	unsigned cur_bytes, returned_bytes;
+	int n;
+	const unsigned sizeof_attr_list = _osd_req_sizeof_alist_header(or);
+	void *cur_p;
+
+	if (!_osd_req_is_alist_type(or, or->get_attr.buff,
+				    OSD_ATTR_LIST_SET_RETRIEVE)) {
+		oa->attr_page = 0;
+		oa->attr_id = 0;
+		oa->val_ptr = NULL;
+		oa->len = 0;
+		*iterator = NULL;
+		return 0;
+	}
+
+	if (*iterator) {
+		BUG_ON((*iterator < or->get_attr.buff) ||
+		     (or->get_attr.buff + or->get_attr.alloc_size < *iterator));
+		cur_p = *iterator;
+		cur_bytes = (*iterator - or->get_attr.buff) - sizeof_attr_list;
+		returned_bytes = or->get_attr.total_bytes;
+	} else { /* first time decode the list header */
+		cur_bytes = sizeof_attr_list;
+		returned_bytes = _osd_req_alist_size(or, or->get_attr.buff) +
+					sizeof_attr_list;
+
+		cur_p = or->get_attr.buff + sizeof_attr_list;
+
+		if (returned_bytes > or->get_attr.alloc_size) {
+			OSD_DEBUG("target report: space was not big enough! "
+				  "Allocate=%u Needed=%u\n",
+				  or->get_attr.alloc_size,
+				  returned_bytes + sizeof_attr_list);
+
+			returned_bytes =
+				or->get_attr.alloc_size - sizeof_attr_list;
+		}
+		or->get_attr.total_bytes = returned_bytes;
+	}
+
+	for (n = 0; (n < *nelem) && (cur_bytes < returned_bytes); ++n) {
+		struct osd_attributes_list_element *attr = cur_p;
+		unsigned inc;
+
+		oa->len = be16_to_cpu(attr->attr_bytes);
+		inc = _osd_req_alist_elem_size(or, oa->len);
+		OSD_DEBUG("oa->len=%d inc=%d cur_bytes=%d\n",
+			  oa->len, inc, cur_bytes);
+		cur_bytes += inc;
+		if (cur_bytes > returned_bytes) {
+			OSD_ERR("BAD FOOD from target. list not valid!"
+				"c=%d r=%d n=%d\n",
+				cur_bytes, returned_bytes, n);
+			oa->val_ptr = NULL;
+			break;
+		}
+
+		oa->attr_page = be32_to_cpu(attr->attr_page);
+		oa->attr_id = be32_to_cpu(attr->attr_id);
+		oa->val_ptr = attr->attr_val;
+
+		cur_p += inc;
+		++oa;
+	}
+
+	*iterator = (returned_bytes - cur_bytes) ? cur_p : NULL;
+	*nelem = n;
+	return returned_bytes - cur_bytes;
+}
+EXPORT_SYMBOL(osd_req_decode_get_attr_list);
+
+/*
+ * Attributes Page-mode
+ */
+
+int osd_req_add_get_attr_page(struct osd_request *or,
+	u32 page_id, void *attar_page, unsigned max_page_len,
+	const struct osd_attr *set_one_attr)
+{
+	struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
+
+	if (or->attributes_mode &&
+	    or->attributes_mode != OSD_CDB_GET_ATTR_PAGE_SET_ONE) {
+		WARN_ON(1);
+		return -EINVAL;
+	}
+	or->attributes_mode = OSD_CDB_GET_ATTR_PAGE_SET_ONE;
+
+	or->get_attr.buff = attar_page;
+	or->get_attr.total_bytes = max_page_len;
+
+	or->set_attr.buff = set_one_attr->val_ptr;
+	or->set_attr.total_bytes = set_one_attr->len;
+
+	cdbh->attrs_page.get_attr_page = cpu_to_be32(page_id);
+	cdbh->attrs_page.get_attr_alloc_length = cpu_to_be32(max_page_len);
+	/* ocdb->attrs_page.get_attr_offset; */
+
+	cdbh->attrs_page.set_attr_page = cpu_to_be32(set_one_attr->attr_page);
+	cdbh->attrs_page.set_attr_id = cpu_to_be32(set_one_attr->attr_id);
+	cdbh->attrs_page.set_attr_length = cpu_to_be32(set_one_attr->len);
+	/* ocdb->attrs_page.set_attr_offset; */
+	return 0;
+}
+EXPORT_SYMBOL(osd_req_add_get_attr_page);
+
+static int _osd_req_finalize_attr_page(struct osd_request *or)
+{
+	struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
+	unsigned in_padding, out_padding;
+	int ret;
+
+	/* returned page */
+	cdbh->attrs_page.get_attr_offset =
+		osd_req_encode_offset(or, or->in.total_bytes, &in_padding);
+
+	ret = _req_append_segment(or, in_padding, &or->get_attr, NULL,
+				  &or->in);
+	if (ret)
+		return ret;
+
+	/* set one value */
+	cdbh->attrs_page.set_attr_offset =
+		osd_req_encode_offset(or, or->out.total_bytes, &out_padding);
+
+	ret = _req_append_segment(or, out_padding, &or->enc_get_attr, NULL,
+				  &or->out);
+	return ret;
+}
+
 /*
  * osd_finalize_request and helpers
  */

@@ -378,9 +893,31 @@ int osd_finalize_request(struct osd_request *or,
 			_LLU(or->in.total_bytes), or->in.req->data_len);
 	}
 
+	or->out.pad_buff = sg_out_pad_buffer;
+	or->in.pad_buff = sg_in_pad_buffer;
+
 	if (!or->attributes_mode)
 		or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
 	cdbh->command_specific_options |= or->attributes_mode;
+	if (or->attributes_mode == OSD_CDB_GET_ATTR_PAGE_SET_ONE) {
+		ret = _osd_req_finalize_attr_page(or);
+	} else {
+		/* TODO: I think that for the GET_ATTR command these 2 should
+		 * be reversed to keep them in execution order (for embeded
+		 * targets with low memory footprint)
+		 */
+		ret = _osd_req_finalize_set_attr_list(or);
+		if (ret) {
+			OSD_DEBUG("_osd_req_finalize_set_attr_list failed\n");
+			return ret;
+		}
+
+		ret = _osd_req_finalize_get_attr_list(or);
+		if (ret) {
+			OSD_DEBUG("_osd_req_finalize_get_attr_list failed\n");
+			return ret;
+		}
+	}
 
 	or->request->cmd = or->cdb.buff;
 	or->request->cmd_len = _osd_req_cdb_len(or);

@@ -446,3 +983,45 @@ void osd_set_caps(struct osd_cdb *cdb, const void *caps)
 {
 	memcpy(&cdb->v1.caps, caps, OSDv1_CAP_LEN);
 }
+
+/*
+ * Declared in osd_protocol.h
+ * 4.12.5 Data-In and Data-Out buffer offsets
+ * byte offset = mantissa * (2^(exponent+8))
+ * Returns the smallest allowed encoded offset that contains given @offset
+ * The actual encoded offset returned is @offset + *@padding.
+ */
+osd_cdb_offset __osd_encode_offset(
+	u64 offset, unsigned *padding, int min_shift, int max_shift)
+{
+	u64 try_offset = -1, mod, align;
+	osd_cdb_offset be32_offset;
+	int shift;
+
+	*padding = 0;
+	if (!offset)
+		return 0;
+
+	for (shift = min_shift; shift < max_shift; ++shift) {
+		try_offset = offset >> shift;
+		if (try_offset < (1 << OSD_OFFSET_MAX_BITS))
+			break;
+	}
+
+	BUG_ON(shift == max_shift);
+
+	align = 1 << shift;
+	mod = offset & (align - 1);
+	if (mod) {
+		*padding = align - mod;
+		try_offset += 1;
+	}
+
+	try_offset |= ((shift - 8) & 0xf) << 28;
+	be32_offset = cpu_to_be32((u32)try_offset);
+
+	OSD_DEBUG("offset=%llu mantissa=%llu exp=%d encoded=%x pad=%d\n",
+		 _LLU(offset), _LLU(try_offset & 0x0FFFFFFF), shift,
+		 be32_offset, *padding);
+	return be32_offset;
+}

327 lines not on this page · raw message

index b982d76..6849f26 100644
@@ -111,6 +111,14 @@ static osd_cdb_offset osd_req_encode_offset(struct osd_request *or,
 				  OSDv1_OFFSET_MIN_SHIFT, OSD_OFFSET_MAX_SHIFT);
 }
 
+static struct osd_security_parameters *
+_osd_req_sec_params(struct osd_request *or)
+{
+	struct osd_cdb *ocdb = &or->cdb;
+
+	return &ocdb->v1.sec_params;
+}
+
 void osd_dev_init(struct osd_dev *osdd, struct scsi_device *scsi_device)
 {
 	memset(osdd, 0, sizeof(*osdd));

@@ -799,6 +807,64 @@ static int _osd_req_finalize_attr_page(struct osd_request *or)
 	return ret;
 }
 
+static int _osd_req_finalize_data_integrity(struct osd_request *or,
+	bool has_in, bool has_out, const u8 *cap_key)
+{
+	struct osd_security_parameters *sec_parms = _osd_req_sec_params(or);
+	int ret;
+
+	if (!osd_is_sec_alldata(sec_parms))
+		return 0;
+
+	if (has_out) {
+		struct _osd_req_data_segment seg = {
+			.buff = &or->out_data_integ,
+			.total_bytes = sizeof(or->out_data_integ),
+		};
+		unsigned pad;
+
+		or->out_data_integ.data_bytes = cpu_to_be64(
+			or->out.bio ? or->out.bio->bi_size : 0);
+		or->out_data_integ.set_attributes_bytes = cpu_to_be64(
+			or->set_attr.total_bytes);
+		or->out_data_integ.get_attributes_bytes = cpu_to_be64(
+			or->enc_get_attr.total_bytes);
+
+		sec_parms->data_out_integrity_check_offset =
+			osd_req_encode_offset(or, or->out.total_bytes, &pad);
+
+		ret = _req_append_segment(or, pad, &seg, or->out.last_seg,
+					  &or->out);
+		if (ret)
+			return ret;
+		or->out.last_seg = NULL;
+
+		/* they are now all chained to request sign them all together */
+		osd_sec_sign_data(&or->out_data_integ, or->out.req->bio,
+				  cap_key);
+	}
+
+	if (has_in) {
+		struct _osd_req_data_segment seg = {
+			.buff = &or->in_data_integ,
+			.total_bytes = sizeof(or->in_data_integ),
+		};
+		unsigned pad;
+
+		sec_parms->data_in_integrity_check_offset =
+			osd_req_encode_offset(or, or->in.total_bytes, &pad);
+
+		ret = _req_append_segment(or, pad, &seg, or->in.last_seg,
+					  &or->in);
+		if (ret)
+			return ret;
+
+		or->in.last_seg = NULL;
+	}
+
+	return 0;
+}
+
 /*
  * osd_finalize_request and helpers
  */

@@ -919,6 +985,12 @@ int osd_finalize_request(struct osd_request *or,
 		}
 	}
 
+	ret = _osd_req_finalize_data_integrity(or, has_in, has_out, cap_key);
+	if (ret)
+		return ret;
+
+	osd_sec_sign_cdb(&or->cdb, cap_key);
+
 	or->request->cmd = or->cdb.buff;
 	or->request->cmd_len = _osd_req_cdb_len(or);
 

@@ -984,6 +1056,20 @@ void osd_set_caps(struct osd_cdb *cdb, const void *caps)
 	memcpy(&cdb->v1.caps, caps, OSDv1_CAP_LEN);
 }
 
+bool osd_is_sec_alldata(struct osd_security_parameters *sec_parms __unused)
+{
+	return false;
+}
+
+void osd_sec_sign_cdb(struct osd_cdb *ocdb __unused, const u8 *cap_key __unused)
+{
+}
+
+void osd_sec_sign_data(void *data_integ __unused,
+		       struct bio *bio __unused, const u8 *cap_key __unused)
+{
+}
+
 /*
  * Declared in osd_protocol.h
  * 4.12.5 Data-In and Data-Out buffer offsets

index 6849f26..5d9457b 100644
@@ -104,6 +104,16 @@ static bool _osd_req_is_alist_type(struct osd_request *or,
 	}
 }
 
+/* This is for List-objects not Attributes-Lists */
+static void _osd_req_encode_olist(struct osd_request *or,
+	struct osd_obj_id_list *list)
+{
+	struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
+
+	cdbh->v1.list_identifier = list->list_identifier;
+	cdbh->v1.start_address = list->continuation_id;
+}
+
 static osd_cdb_offset osd_req_encode_offset(struct osd_request *or,
 	u64 offset, unsigned *padding)
 {

@@ -340,6 +350,29 @@ void osd_req_format(struct osd_request *or, u64 tot_capacity)
 }
 EXPORT_SYMBOL(osd_req_format);
 
+int osd_req_list_dev_partitions(struct osd_request *or,
+	osd_id initial_id, struct osd_obj_id_list *list, unsigned nelem)
+{
+	return osd_req_list_partition_objects(or, 0, initial_id, list, nelem);
+}
+EXPORT_SYMBOL(osd_req_list_dev_partitions);
+
+static void _osd_req_encode_flush(struct osd_request *or,
+	enum osd_options_flush_scope_values op)
+{
+	struct osd_cdb_head *ocdb = osd_cdb_head(&or->cdb);
+
+	ocdb->command_specific_options = op;
+}
+
+void osd_req_flush_obsd(struct osd_request *or,
+	enum osd_options_flush_scope_values op)
+{
+	_osd_req_encode_common(or, OSD_ACT_FLUSH_OSD, &osd_root_object, 0, 0);
+	_osd_req_encode_flush(or, op);
+}
+EXPORT_SYMBOL(osd_req_flush_obsd);
+
 /*
  * Partition commands
  */

@@ -366,6 +399,88 @@ void osd_req_remove_partition(struct osd_request *or, osd_id partition)
 }
 EXPORT_SYMBOL(osd_req_remove_partition);
 
+static int _osd_req_list_objects(struct osd_request *or,
+	__be16 action, const struct osd_obj_id *obj, osd_id initial_id,
+	struct osd_obj_id_list *list, unsigned nelem)
+{
+	struct request_queue *q = or->osd_dev->scsi_device->request_queue;
+	u64 len = nelem * sizeof(osd_id) + sizeof(*list);
+	struct bio *bio;
+
+	_osd_req_encode_common(or, action, obj, (u64)initial_id, len);
+
+	if (list->list_identifier)
+		_osd_req_encode_olist(or, list);
+
+	WARN_ON(or->in.bio);
+	bio = bio_map_kern(q, list, len, or->alloc_flags);
+	if (!bio) {
+		OSD_ERR("!!! Failed to allocate list_objects BIO\n");
+		return -ENOMEM;
+	}
+
+	bio->bi_rw &= ~(1 << BIO_RW);
+	or->in.bio = bio;
+	or->in.total_bytes = bio->bi_size;
+	return 0;
+}
+
+int osd_req_list_partition_collections(struct osd_request *or,
+	osd_id partition, osd_id initial_id, struct osd_obj_id_list *list,
+	unsigned nelem)
+{
+	struct osd_obj_id par = {
+		.partition = partition,
+		.id = 0,
+	};
+
+	return osd_req_list_collection_objects(or, &par, initial_id, list,
+					       nelem);
+}
+EXPORT_SYMBOL(osd_req_list_partition_collections);
+
+int osd_req_list_partition_objects(struct osd_request *or,
+	osd_id partition, osd_id initial_id, struct osd_obj_id_list *list,
+	unsigned nelem)
+{
+	struct osd_obj_id par = {
+		.partition = partition,
+		.id = 0,
+	};
+
+	return _osd_req_list_objects(or, OSD_ACT_LIST, &par, initial_id, list,
+				     nelem);
+}
+EXPORT_SYMBOL(osd_req_list_partition_objects);
+
+void osd_req_flush_partition(struct osd_request *or,
+	osd_id partition, enum osd_options_flush_scope_values op)
+{
+	_osd_req_encode_partition(or, OSD_ACT_FLUSH_PARTITION, partition);
+	_osd_req_encode_flush(or, op);
+}
+EXPORT_SYMBOL(osd_req_flush_partition);
+
+/*
+ * Collection commands
+ */
+int osd_req_list_collection_objects(struct osd_request *or,
+	const struct osd_obj_id *obj, osd_id initial_id,
+	struct osd_obj_id_list *list, unsigned nelem)
+{
+	return _osd_req_list_objects(or, OSD_ACT_LIST_COLLECTION, obj,
+				     initial_id, list, nelem);
+}
+EXPORT_SYMBOL(osd_req_list_collection_objects);
+
+void osd_req_flush_collection(struct osd_request *or,
+	const struct osd_obj_id *obj, enum osd_options_flush_scope_values op)
+{
+	_osd_req_encode_common(or, OSD_ACT_FLUSH_PARTITION, obj, 0, 0);
+	_osd_req_encode_flush(or, op);
+}
+EXPORT_SYMBOL(osd_req_flush_collection);
+
 /*
  * Object commands
  */

@@ -392,6 +507,15 @@ void osd_req_write(struct osd_request *or,
 }
 EXPORT_SYMBOL(osd_req_write);
 
+void osd_req_flush_object(struct osd_request *or,
+	const struct osd_obj_id *obj, enum osd_options_flush_scope_values op,
+	/*V2*/ u64 offset, /*V2*/ u64 len)
+{
+	_osd_req_encode_common(or, OSD_ACT_FLUSH, obj, offset, len);
+	_osd_req_encode_flush(or, op);
+}
+EXPORT_SYMBOL(osd_req_flush_object);
+
 void osd_req_read(struct osd_request *or,
 	const struct osd_obj_id *obj, struct bio *bio, u64 offset)
 {

index 5d9457b..3fd021a 100644
@@ -343,6 +343,9 @@ static void _osd_req_encode_common(struct osd_request *or,
 /*
  * Device commands
  */
+/*TODO: void osd_req_set_master_seed_xchg(struct osd_request *, ...); */
+/*TODO: void osd_req_set_master_key(struct osd_request *, ...); */
+
 void osd_req_format(struct osd_request *or, u64 tot_capacity)
 {
 	_osd_req_encode_common(or, OSD_ACT_FORMAT_OSD, &osd_root_object, 0,

@@ -373,6 +376,10 @@ void osd_req_flush_obsd(struct osd_request *or,
 }
 EXPORT_SYMBOL(osd_req_flush_obsd);
 
+/*TODO: void osd_req_perform_scsi_command(struct osd_request *,
+	const u8 *cdb, ...); */
+/*TODO: void osd_req_task_management(struct osd_request *, ...); */
+
 /*
  * Partition commands
  */

@@ -399,6 +406,10 @@ void osd_req_remove_partition(struct osd_request *or, osd_id partition)
 }
 EXPORT_SYMBOL(osd_req_remove_partition);
 
+/*TODO: void osd_req_set_partition_key(struct osd_request *,
+	osd_id partition, u8 new_key_id[OSD_CRYPTO_KEYID_SIZE],
+	u8 seed[OSD_CRYPTO_SEED_SIZE]); */
+
 static int _osd_req_list_objects(struct osd_request *or,
 	__be16 action, const struct osd_obj_id *obj, osd_id initial_id,
 	struct osd_obj_id_list *list, unsigned nelem)

@@ -464,6 +475,11 @@ EXPORT_SYMBOL(osd_req_flush_partition);
 /*
  * Collection commands
  */
+/*TODO: void osd_req_create_collection(struct osd_request *,
+	const struct osd_obj_id *); */
+/*TODO: void osd_req_remove_collection(struct osd_request *,
+	const struct osd_obj_id *); */
+
 int osd_req_list_collection_objects(struct osd_request *or,
 	const struct osd_obj_id *obj, osd_id initial_id,
 	struct osd_obj_id_list *list, unsigned nelem)

@@ -473,6 +489,8 @@ int osd_req_list_collection_objects(struct osd_request *or,
 }
 EXPORT_SYMBOL(osd_req_list_collection_objects);
 
+/*TODO: void query(struct osd_request *, ...); V2 */
+
 void osd_req_flush_collection(struct osd_request *or,
 	const struct osd_obj_id *obj, enum osd_options_flush_scope_values op)
 {

@@ -481,6 +499,9 @@ void osd_req_flush_collection(struct osd_request *or,
 }
 EXPORT_SYMBOL(osd_req_flush_collection);
 
+/*TODO: void get_member_attrs(struct osd_request *, ...); V2 */
+/*TODO: void set_member_attrs(struct osd_request *, ...); V2 */
+
 /*
  * Object commands
  */

@@ -496,6 +517,11 @@ void osd_req_remove_object(struct osd_request *or, struct osd_obj_id *obj)
 }
 EXPORT_SYMBOL(osd_req_remove_object);
 
+
+/*TODO: void osd_req_create_multi(struct osd_request *or,
+	struct osd_obj_id *first, struct osd_obj_id_list *list, unsigned nelem);
+*/
+
 void osd_req_write(struct osd_request *or,
 	const struct osd_obj_id *obj, struct bio *bio, u64 offset)
 {

@@ -507,6 +533,15 @@ void osd_req_write(struct osd_request *or,
 }
 EXPORT_SYMBOL(osd_req_write);
 
+/*TODO: void osd_req_append(struct osd_request *,
+	const struct osd_obj_id *, struct bio *data_out); */
+/*TODO: void osd_req_create_write(struct osd_request *,
+	const struct osd_obj_id *, struct bio *data_out, u64 offset); */
+/*TODO: void osd_req_clear(struct osd_request *,
+	const struct osd_obj_id *, u64 offset, u64 len); */
+/*TODO: void osd_req_punch(struct osd_request *,
+	const struct osd_obj_id *, u64 offset, u64 len); V2 */
+
 void osd_req_flush_object(struct osd_request *or,
 	const struct osd_obj_id *obj, enum osd_options_flush_scope_values op,
 	/*V2*/ u64 offset, /*V2*/ u64 len)

index 3fd021a..86a76cc 100644
@@ -59,36 +59,50 @@ static inline void build_test(void)
 {
 	/* structures were not packed */
 	BUILD_BUG_ON(sizeof(struct osd_capability) != OSD_CAP_LEN);
+	BUILD_BUG_ON(sizeof(struct osdv2_cdb) != OSD_TOTAL_CDB_LEN);
 	BUILD_BUG_ON(sizeof(struct osdv1_cdb) != OSDv1_TOTAL_CDB_LEN);
 }
 
 static unsigned _osd_req_cdb_len(struct osd_request *or)
 {
-	return OSDv1_TOTAL_CDB_LEN;
+	return osd_req_is_ver1(or) ? OSDv1_TOTAL_CDB_LEN : OSD_TOTAL_CDB_LEN;
 }
 
 static unsigned _osd_req_alist_elem_size(struct osd_request *or, unsigned len)
 {
-	return osdv1_attr_list_elem_size(len);
+	return osd_req_is_ver1(or) ?
+		osdv1_attr_list_elem_size(len) :
+		osdv2_attr_list_elem_size(len);
 }
 
 static unsigned _osd_req_alist_size(struct osd_request *or, void *list_head)
 {
-	return osdv1_list_size(list_head);
+	return osd_req_is_ver1(or) ?
+		osdv1_list_size(list_head) :
+		osdv2_list_size(list_head);
 }
 
 static unsigned _osd_req_sizeof_alist_header(struct osd_request *or)
 {
-	return sizeof(struct osdv1_attributes_list_header);
+	return osd_req_is_ver1(or) ?
+		sizeof(struct osdv1_attributes_list_header) :
+		sizeof(struct osdv2_attributes_list_header);
 }
 
 static void _osd_req_set_alist_type(struct osd_request *or,
 	void *list, int list_type)
 {
-	struct osdv1_attributes_list_header *attr_list = list;
+	if (osd_req_is_ver1(or)) {
+		struct osdv1_attributes_list_header *attr_list = list;
+
+		memset(attr_list, 0, sizeof(*attr_list));
+		attr_list->type = list_type;
+	} else {
+		struct osdv2_attributes_list_header *attr_list = list;
 
-	memset(attr_list, 0, sizeof(*attr_list));
-	attr_list->type = list_type;
+		memset(attr_list, 0, sizeof(*attr_list));
+		attr_list->type = list_type;
+	}
 }
 
 static bool _osd_req_is_alist_type(struct osd_request *or,

@@ -97,10 +111,14 @@ static bool _osd_req_is_alist_type(struct osd_request *or,
 	if (!list)
 		return false;
 
-	if (1) {
+	if (osd_req_is_ver1(or)) {
 		struct osdv1_attributes_list_header *attr_list = list;
 
 		return attr_list->type == list_type;
+	} else {
+		struct osdv2_attributes_list_header *attr_list = list;
+
+		return attr_list->type == list_type;
 	}
 }
 

@@ -110,15 +128,22 @@ static void _osd_req_encode_olist(struct osd_request *or,
 {
 	struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
 
-	cdbh->v1.list_identifier = list->list_identifier;
-	cdbh->v1.start_address = list->continuation_id;
+	if (osd_req_is_ver1(or)) {
+		cdbh->v1.list_identifier = list->list_identifier;
+		cdbh->v1.start_address = list->continuation_id;
+	} else {
+		cdbh->v2.list_identifier = list->list_identifier;
+		cdbh->v2.start_address = list->continuation_id;
+	}
 }
 
 static osd_cdb_offset osd_req_encode_offset(struct osd_request *or,
 	u64 offset, unsigned *padding)
 {
 	return __osd_encode_offset(offset, padding,
-				  OSDv1_OFFSET_MIN_SHIFT, OSD_OFFSET_MAX_SHIFT);
+			osd_req_is_ver1(or) ?
+				OSDv1_OFFSET_MIN_SHIFT : OSD_OFFSET_MIN_SHIFT,
+			OSD_OFFSET_MAX_SHIFT);
 }
 
 static struct osd_security_parameters *

@@ -126,7 +151,10 @@ _osd_req_sec_params(struct osd_request *or)
 {
 	struct osd_cdb *ocdb = &or->cdb;
 
-	return &ocdb->v1.sec_params;
+	if (osd_req_is_ver1(or))
+		return &ocdb->v1.sec_params;
+	else
+		return &ocdb->v2.sec_params;
 }
 
 void osd_dev_init(struct osd_dev *osdd, struct scsi_device *scsi_device)

@@ -134,6 +162,9 @@ void osd_dev_init(struct osd_dev *osdd, struct scsi_device *scsi_device)
 	memset(osdd, 0, sizeof(*osdd));
 	osdd->scsi_device = scsi_device;
 	osdd->def_timeout = BLK_DEFAULT_SG_TIMEOUT;
+#ifdef OSD_VER1_SUPPORT
+	osdd->version = OSD_VER2;
+#endif
 	/* TODO: Allocate pools for osd_request attributes ... */
 }
 EXPORT_SYMBOL(osd_dev_init);

@@ -334,10 +365,30 @@ static void _osdv1_req_encode_common(struct osd_request *or,
 	ocdb->h.v1.start_address = cpu_to_be64(offset);
 }
 
+static void _osdv2_req_encode_common(struct osd_request *or,
+	 __be16 act, const struct osd_obj_id *obj, u64 offset, u64 len)
+{
+	struct osdv2_cdb *ocdb = &or->cdb.v2;
+
+	OSD_DEBUG("OSDv2 execute opcode 0x%x\n", be16_to_cpu(act));
+
+	ocdb->h.varlen_cdb.opcode = VARIABLE_LENGTH_CMD;
+	ocdb->h.varlen_cdb.additional_cdb_length = OSD_ADDITIONAL_CDB_LENGTH;
+	ocdb->h.varlen_cdb.service_action = act;
+
+	ocdb->h.partition = cpu_to_be64(obj->partition);
+	ocdb->h.object = cpu_to_be64(obj->id);
+	ocdb->h.v2.length = cpu_to_be64(len);
+	ocdb->h.v2.start_address = cpu_to_be64(offset);
+}
+
 static void _osd_req_encode_common(struct osd_request *or,
 	__be16 act, const struct osd_obj_id *obj, u64 offset, u64 len)
 {
-	_osdv1_req_encode_common(or, act, obj, offset, len);
+	if (osd_req_is_ver1(or))
+		_osdv1_req_encode_common(or, act, obj, offset, len);
+	else
+		_osdv2_req_encode_common(or, act, obj, offset, len);
 }
 
 /*

@@ -546,6 +597,12 @@ void osd_req_flush_object(struct osd_request *or,
 	const struct osd_obj_id *obj, enum osd_options_flush_scope_values op,
 	/*V2*/ u64 offset, /*V2*/ u64 len)
 {
+	if (unlikely(osd_req_is_ver1(or) && (offset || len))) {
+		OSD_DEBUG("OSD Ver1 flush on specific range ignored\n");
+		offset = 0;
+		len = 0;
+	}
+
 	_osd_req_encode_common(or, OSD_ACT_FLUSH, obj, offset, len);
 	_osd_req_encode_flush(or, op);
 }

@@ -1169,6 +1226,10 @@ enum { OSD_SEC_CAP_V1_ALL_CAPS =
 	OSD_SEC_CAP_GLOBAL | OSD_SEC_CAP_DEV_MGMT
 };
 
+enum { OSD_SEC_CAP_V2_ALL_CAPS =
+	OSD_SEC_CAP_V1_ALL_CAPS | OSD_SEC_CAP_QUERY | OSD_SEC_CAP_M_OBJECT
+};
+
 void osd_sec_init_nosec_doall_caps(void *caps,
 	const struct osd_obj_id *obj, bool is_collection, const bool is_v1)
 {

@@ -1210,9 +1271,14 @@ void osd_sec_init_nosec_doall_caps(void *caps,
 }
 EXPORT_SYMBOL(osd_sec_init_nosec_doall_caps);
 
+/* FIXME: Extract version from caps pointer.
+ *        Also Pete's target only supports caps from OSDv1 for now
+ */
 void osd_set_caps(struct osd_cdb *cdb, const void *caps)
 {
-	memcpy(&cdb->v1.caps, caps, OSDv1_CAP_LEN);
+	bool is_ver1 = true;
+	/* NOTE: They start at same address */
+	memcpy(&cdb->v1.caps, caps, is_ver1 ? OSDv1_CAP_LEN : OSD_CAP_LEN);
 }
 
 bool osd_is_sec_alldata(struct osd_security_parameters *sec_parms __unused)

index e84dc7a..8482777 100644
@@ -21,6 +21,23 @@
 
 /* Note: "NI" in comments below means "Not Implemented yet" */
 
+/* Configure of code:
+ * #undef if you *don't* want OSD v1 support in runtime.
+ * If #defined the initiator will dynamically configure to encode OSD v1
+ * CDB's if the target is detected to be OSD v1 only.
+ * OSD v2 only commands, options, and attributes will be ignored if target
+ * is v1 only.
+ * If #defined will result in bigger/slower code (OK Slower maybe not)
+ * Q: Should this be CONFIG_SCSI_OSD_VER1_SUPPORT and set from Kconfig?
+ */
+#define OSD_VER1_SUPPORT y
+
+enum osd_std_version {
+	OSD_VER_NONE = 0,
+	OSD_VER1 = 1,
+	OSD_VER2 = 2,
+};
+
 /*
  * Object-based Storage Device.
  * This object represents an OSD device.

@@ -31,6 +48,10 @@
 struct osd_dev {
 	struct scsi_device *scsi_device;
 	unsigned def_timeout;
+
+#ifdef OSD_VER1_SUPPORT
+	enum osd_std_version version;
+#endif
 };
 
 /* Retrieve/return osd_dev(s) for use by Kernel clients */

@@ -46,6 +67,14 @@ void osduld_unregister_test(unsigned ioctl);
 void osd_dev_init(struct osd_dev *od, struct scsi_device *scsi_device);
 void osd_dev_fini(struct osd_dev *od);
 
+/* we might want to use function vector in the future */
+static inline void osd_dev_set_ver(struct osd_dev *od, enum osd_std_version v)
+{
+#ifdef OSD_VER1_SUPPORT
+	od->version = v;
+#endif
+}
+
 struct osd_request;
 typedef void (osd_req_done_fn)(struct osd_request *or, void *private);
 

@@ -82,6 +111,16 @@ struct osd_request {
 	int async_error;
 };
 
+/* OSD Version control */
+static inline bool osd_req_is_ver1(struct osd_request *or)
+{
+#ifdef OSD_VER1_SUPPORT
+	return or->osd_dev->version == OSD_VER1;
+#else
+	return false;
+#endif
+}
+
 /*
  * How to use the osd library:
  *

172 lines not on this page · raw message

index 86a76cc..f6340c2 100644
@@ -41,6 +41,7 @@
 
 #include <scsi/osd_initiator.h>
 #include <scsi/osd_sec.h>
+#include <scsi/osd_attributes.h>
 #include <scsi/scsi_device.h>
 
 #include "osd_debug.h"

@@ -63,6 +64,130 @@ static inline void build_test(void)
 	BUILD_BUG_ON(sizeof(struct osdv1_cdb) != OSDv1_TOTAL_CDB_LEN);
 }
 
+static const char *_osd_ver_desc(struct osd_request *or)
+{
+	return osd_req_is_ver1(or) ? "OSD1" : "OSD2";
+}
+
+#define ATTR_DEF_RI(id, len) ATTR_DEF(OSD_APAGE_ROOT_INFORMATION, id, len)
+
+static int _osd_print_system_info(struct osd_dev *od, void *caps)
+{
+	struct osd_request *or;
+	struct osd_attr get_attrs[] = {
+		ATTR_DEF_RI(OSD_ATTR_RI_VENDOR_IDENTIFICATION, 8),
+		ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_IDENTIFICATION, 16),
+		ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_MODEL, 32),
+		ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_REVISION_LEVEL, 4),
+		ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_SERIAL_NUMBER, 64 /*variable*/),
+		ATTR_DEF_RI(OSD_ATTR_RI_OSD_NAME, 64 /*variable*/),
+		ATTR_DEF_RI(OSD_ATTR_RI_TOTAL_CAPACITY, 8),
+		ATTR_DEF_RI(OSD_ATTR_RI_USED_CAPACITY, 8),
+		ATTR_DEF_RI(OSD_ATTR_RI_NUMBER_OF_PARTITIONS, 8),
+		ATTR_DEF_RI(OSD_ATTR_RI_CLOCK, 6),
+		/* IBM-OSD-SIM Has a bug with this one put it last */
+		ATTR_DEF_RI(OSD_ATTR_RI_OSD_SYSTEM_ID, 20),
+	};
+	void *iter = NULL, *pFirst;
+	int nelem = ARRAY_SIZE(get_attrs), a = 0;
+	int ret;
+
+	or = osd_start_request(od, GFP_KERNEL);
+	if (!or)
+		return -ENOMEM;
+
+	/* get attrs */
+	osd_req_get_attributes(or, &osd_root_object);
+	osd_req_add_get_attr_list(or, get_attrs, ARRAY_SIZE(get_attrs));
+
+	ret = osd_finalize_request(or, 0, caps, NULL);
+	if (ret)
+		goto out;
+
+	ret = osd_execute_request(or);
+	if (ret) {
+		OSD_ERR("Failed to detect %s => %d\n", _osd_ver_desc(or), ret);
+		goto out;
+	}
+
+	osd_req_decode_get_attr_list(or, get_attrs, &nelem, &iter);
+
+	OSD_INFO("Detected %s device\n",
+		_osd_ver_desc(or));
+
+	pFirst = get_attrs[a++].val_ptr;
+	OSD_INFO("OSD_ATTR_RI_VENDOR_IDENTIFICATION [%s]\n",
+		(char *)pFirst);
+
+	pFirst = get_attrs[a++].val_ptr;
+	OSD_INFO("OSD_ATTR_RI_PRODUCT_IDENTIFICATION [%s]\n",
+		(char *)pFirst);
+
+	pFirst = get_attrs[a++].val_ptr;
+	OSD_INFO("OSD_ATTR_RI_PRODUCT_MODEL [%s]\n",
+		(char *)pFirst);
+
+	pFirst = get_attrs[a++].val_ptr;
+	OSD_INFO("OSD_ATTR_RI_PRODUCT_REVISION_LEVEL [%u]\n",
+		get_unaligned_be32(pFirst));
+
+	pFirst = get_attrs[a++].val_ptr;
+	OSD_INFO("OSD_ATTR_RI_PRODUCT_SERIAL_NUMBER [%s]\n",
+		(char *)pFirst);
+
+	pFirst = get_attrs[a].val_ptr;
+	OSD_INFO("OSD_ATTR_RI_OSD_NAME [%s]\n", (char *)pFirst);
+	a++;
+
+	pFirst = get_attrs[a++].val_ptr;
+	OSD_INFO("OSD_ATTR_RI_TOTAL_CAPACITY [0x%llx]\n",
+		_LLU(get_unaligned_be64(pFirst)));
+
+	pFirst = get_attrs[a++].val_ptr;
+	OSD_INFO("OSD_ATTR_RI_USED_CAPACITY [0x%llx]\n",
+		_LLU(get_unaligned_be64(pFirst)));
+
+	pFirst = get_attrs[a++].val_ptr;
+	OSD_INFO("OSD_ATTR_RI_NUMBER_OF_PARTITIONS [%llu]\n",
+		_LLU(get_unaligned_be64(pFirst)));
+
+	/* FIXME: Where are the time utilities */
+	pFirst = get_attrs[a++].val_ptr;
+	OSD_INFO("OSD_ATTR_RI_CLOCK [0x%02x%02x%02x%02x%02x%02x]\n",
+		((char *)pFirst)[0], ((char *)pFirst)[1],
+		((char *)pFirst)[2], ((char *)pFirst)[3],
+		((char *)pFirst)[4], ((char *)pFirst)[5]);
+
+	if (a < nelem) { /* IBM-OSD-SIM bug, Might not have it */
+		unsigned len = get_attrs[a].len;
+		char sid_dump[32*4 + 2]; /* 2nibbles+space+ASCII */
+
+		hex_dump_to_buffer(get_attrs[a].val_ptr, len, 32, 1,
+				   sid_dump, sizeof(sid_dump), true);
+		OSD_INFO("OSD_ATTR_RI_OSD_SYSTEM_ID(%d) [%s]\n", len, sid_dump);
+		a++;
+	}
+out:
+	osd_end_request(or);
+	return ret;
+}
+
+int osd_auto_detect_ver(struct osd_dev *od, void *caps)
+{
+	int ret;
+
+	/* Auto-detect the osd version */
+	ret = _osd_print_system_info(od, caps);
+	if (ret) {
+		osd_dev_set_ver(od, OSD_VER1);
+		OSD_DEBUG("converting to OSD1\n");
+		ret = _osd_print_system_info(od, caps);
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL(osd_auto_detect_ver);
+
 static unsigned _osd_req_cdb_len(struct osd_request *or)
 {
 	return osd_req_is_ver1(or) ? OSDv1_TOTAL_CDB_LEN : OSD_TOTAL_CDB_LEN;

index cd4ca7c..f8b1a74 100644
@@ -243,6 +243,7 @@ EXPORT_SYMBOL(osduld_put_device);
 static int __detect_osd(struct osd_uld_device *oud)
 {
 	struct scsi_device *scsi_device = oud->od.scsi_device;
+	char caps[OSD_CAP_LEN];
 	int error;
 
 	/* sending a test_unit_ready as first command seems to be needed

@@ -254,6 +255,10 @@ static int __detect_osd(struct osd_uld_device *oud)
 	if (error)
 		OSD_ERR("warning: scsi_test_unit_ready failed\n");
 
+	osd_sec_init_nosec_doall_caps(caps, &osd_root_object, false, true);
+	if (osd_auto_detect_ver(&oud->od, caps))
+		return -ENODEV;
+
 	return 0;
 }
 

index 8482777..24edeae 100644
@@ -67,6 +67,9 @@ void osduld_unregister_test(unsigned ioctl);
 void osd_dev_init(struct osd_dev *od, struct scsi_device *scsi_device);
 void osd_dev_fini(struct osd_dev *od);
 
+/* some hi level device operations */
+int osd_auto_detect_ver(struct osd_dev *od, void *caps);    /* GFP_KERNEL */
+
 /* we might want to use function vector in the future */
 static inline void osd_dev_set_ver(struct osd_dev *od, enum osd_std_version v)
 {

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