OSD changes for 2.6.31

index 62b2ab8..2cc8e8b 100644
@@ -303,7 +303,15 @@ enum osd_service_actions {
 	OSD_ACT_V2(REMOVE_MEMBER_OBJECTS,	0x21)
 	OSD_ACT_V2(GET_MEMBER_ATTRIBUTES,	0x22)
 	OSD_ACT_V2(SET_MEMBER_ATTRIBUTES,	0x23)
+
+	OSD_ACT_V2(CREATE_CLONE,		0x28)
+	OSD_ACT_V2(CREATE_SNAPSHOT,		0x29)
+	OSD_ACT_V2(DETACH_CLONE,		0x2A)
+	OSD_ACT_V2(REFRESH_SNAPSHOT_CLONE,	0x2B)
+	OSD_ACT_V2(RESTORE_PARTITION_FROM_SNAPSHOT, 0x2C)
+
 	OSD_ACT_V2(READ_MAP,			0x31)
+	OSD_ACT_V2(READ_MAPS_COMPARE,		0x32)
 
 	OSD_ACT_V1_V2(PERFORM_SCSI_COMMAND,	0x8F7E, 0x8F7C)
 	OSD_ACT_V1_V2(SCSI_TASK_MANAGEMENT,	0x8F7F, 0x8F7D)

index f888a6f..56e920a 100644
@@ -29,6 +29,7 @@ enum {
 	OSD_APAGE_PARTITION_INFORMATION = OSD_APAGE_PARTITION_FIRST + 1,
 	OSD_APAGE_PARTITION_QUOTAS	= OSD_APAGE_PARTITION_FIRST + 2,
 	OSD_APAGE_PARTITION_TIMESTAMP	= OSD_APAGE_PARTITION_FIRST + 3,
+	OSD_APAGE_PARTITION_ATTR_ACCESS = OSD_APAGE_PARTITION_FIRST + 4,
 	OSD_APAGE_PARTITION_SECURITY	= OSD_APAGE_PARTITION_FIRST + 5,
 	OSD_APAGE_PARTITION_LAST	= 0x5FFFFFFF,
 

@@ -51,7 +52,9 @@ enum {
 	OSD_APAGE_RESERVED_TYPE_LAST	= 0xEFFFFFFF,
 
 	OSD_APAGE_COMMON_FIRST		= 0xF0000000,
-	OSD_APAGE_COMMON_LAST		= 0xFFFFFFFE,
+	OSD_APAGE_COMMON_LAST		= 0xFFFFFFFD,
+
+	OSD_APAGE_CURRENT_COMMAND	= 0xFFFFFFFE,
 
 	OSD_APAGE_REQUEST_ALL		= 0xFFFFFFFF,
 };

@@ -106,10 +109,30 @@ enum {
 	OSD_ATTR_RI_PRODUCT_REVISION_LEVEL   = 0x7,   /* 4        */
 	OSD_ATTR_RI_PRODUCT_SERIAL_NUMBER    = 0x8,   /* variable */
 	OSD_ATTR_RI_OSD_NAME                 = 0x9,   /* variable */
+	OSD_ATTR_RI_MAX_CDB_CONTINUATION_LEN = 0xA,   /* 4        */
 	OSD_ATTR_RI_TOTAL_CAPACITY           = 0x80,  /* 8        */
 	OSD_ATTR_RI_USED_CAPACITY            = 0x81,  /* 8        */
 	OSD_ATTR_RI_NUMBER_OF_PARTITIONS     = 0xC0,  /* 8        */
 	OSD_ATTR_RI_CLOCK                    = 0x100, /* 6        */
+	OARI_DEFAULT_ISOLATION_METHOD        = 0X110, /* 1        */
+	OARI_SUPPORTED_ISOLATION_METHODS     = 0X111, /* 32       */
+
+	OARI_DATA_ATOMICITY_GUARANTEE                   = 0X120,   /* 8       */
+	OARI_DATA_ATOMICITY_ALIGNMENT                   = 0X121,   /* 8       */
+	OARI_ATTRIBUTES_ATOMICITY_GUARANTEE             = 0X122,   /* 8       */
+	OARI_DATA_ATTRIBUTES_ATOMICITY_MULTIPLIER       = 0X123,   /* 1       */
+
+	OARI_MAXIMUM_SNAPSHOTS_COUNT                    = 0X1C1,    /* 0 or 4 */
+	OARI_MAXIMUM_CLONES_COUNT                       = 0X1C2,    /* 0 or 4 */
+	OARI_MAXIMUM_BRANCH_DEPTH                       = 0X1CC,    /* 0 or 4 */
+	OARI_SUPPORTED_OBJECT_DUPLICATION_METHOD_FIRST  = 0X200,    /* 0 or 4 */
+	OARI_SUPPORTED_OBJECT_DUPLICATION_METHOD_LAST   = 0X2ff,    /* 0 or 4 */
+	OARI_SUPPORTED_TIME_OF_DUPLICATION_METHOD_FIRST = 0X300,    /* 0 or 4 */
+	OARI_SUPPORTED_TIME_OF_DUPLICATION_METHOD_LAST  = 0X30F,    /* 0 or 4 */
+	OARI_SUPPORT_FOR_DUPLICATED_OBJECT_FREEZING     = 0X310,    /* 0 or 4 */
+	OARI_SUPPORT_FOR_SNAPSHOT_REFRESHING            = 0X311,    /* 0 or 1 */
+	OARI_SUPPORTED_CDB_CONTINUATION_DESC_TYPE_FIRST = 0X7000001,/* 0 or 4 */
+	OARI_SUPPORTED_CDB_CONTINUATION_DESC_TYPE_LAST  = 0X700FFFF,/* 0 or 4 */
 };
 /* Root_Information_attributes_page does not have a get_page structure */
 

@@ -120,7 +143,15 @@ enum {
 	OSD_ATTR_PI_PARTITION_ID            = 0x1,     /* 8        */
 	OSD_ATTR_PI_USERNAME                = 0x9,     /* variable */
 	OSD_ATTR_PI_USED_CAPACITY           = 0x81,    /* 8        */
+	OSD_ATTR_PI_USED_CAPACITY_INCREMENT = 0x84,    /* 0 or 8   */
 	OSD_ATTR_PI_NUMBER_OF_OBJECTS       = 0xC1,    /* 8        */
+
+	OSD_ATTR_PI_ACTUAL_DATA_SPACE                      = 0xD1, /* 0 or 8 */
+	OSD_ATTR_PI_RESERVED_DATA_SPACE                    = 0xD2, /* 0 or 8 */
+	OSD_ATTR_PI_DEFAULT_SNAPSHOT_DUPLICATION_METHOD    = 0x200,/* 0 or 4 */
+	OSD_ATTR_PI_DEFAULT_CLONE_DUPLICATION_METHOD       = 0x201,/* 0 or 4 */
+	OSD_ATTR_PI_DEFAULT_SP_TIME_OF_DUPLICATION         = 0x300,/* 0 or 4 */
+	OSD_ATTR_PI_DEFAULT_CLONE_TIME_OF_DUPLICATION      = 0x301,/* 0 or 4 */
 };
 /* Partition Information attributes page does not have a get_page structure */
 

@@ -131,6 +162,7 @@ enum {
 	OSD_ATTR_CI_PARTITION_ID           = 0x1,       /* 8        */
 	OSD_ATTR_CI_COLLECTION_OBJECT_ID   = 0x2,       /* 8        */
 	OSD_ATTR_CI_USERNAME               = 0x9,       /* variable */
+	OSD_ATTR_CI_COLLECTION_TYPE        = 0xA,       /* 1        */
 	OSD_ATTR_CI_USED_CAPACITY          = 0x81,      /* 8        */
 };
 /* Collection Information attributes page does not have a get_page structure */

@@ -144,6 +176,8 @@ enum {
 	OSD_ATTR_OI_USERNAME             = 0x9,       /* variable */
 	OSD_ATTR_OI_USED_CAPACITY        = 0x81,      /* 8        */
 	OSD_ATTR_OI_LOGICAL_LENGTH       = 0x82,      /* 8        */
+	SD_ATTR_OI_ACTUAL_DATA_SPACE     = 0XD1,      /* 0 OR 8   */
+	SD_ATTR_OI_RESERVED_DATA_SPACE   = 0XD2,      /* 0 OR 8   */
 };
 /* Object Information attributes page does not have a get_page structure */
 

@@ -248,7 +282,18 @@ struct object_timestamps_attributes_page {
 	struct osd_timestamp data_modified_time;
 }  __packed;
 
-/* 7.1.2.19 Collections attributes page */
+/* OSD2r05: 7.1.3.19 Attributes Access attributes page
+ * (OSD_APAGE_PARTITION_ATTR_ACCESS)
+ *
+ * each attribute is of the form below. Total array length is deduced
+ * from the attribute's length
+ * (See allowed_attributes_access of the struct osd_cap_object_descriptor)
+ */
+struct attributes_access_attr {
+	struct osd_attributes_list_attrid attr_list[0];
+} __packed;
+
+/* OSD2r05: 7.1.2.21 Collections attributes page */
 /* TBD */
 
 /* 7.1.2.20 Root Policy/Security attributes page (OSD_APAGE_ROOT_SECURITY) */

@@ -324,4 +369,29 @@ struct object_security_attributes_page {
 	__be32 policy_access_tag;
 }  __packed;
 
+/* OSD2r05: 7.1.3.31 Current Command attributes page
+ * (OSD_APAGE_CURRENT_COMMAND)
+ */
+enum {
+	OSD_ATTR_CC_RESPONSE_INTEGRITY_CHECK_VALUE     = 0x1, /* 32  */
+	OSD_ATTR_CC_OBJECT_TYPE                        = 0x2, /* 1   */
+	OSD_ATTR_CC_PARTITION_ID                       = 0x3, /* 8   */
+	OSD_ATTR_CC_OBJECT_ID                          = 0x4, /* 8   */
+	OSD_ATTR_CC_STARTING_BYTE_ADDRESS_OF_APPEND    = 0x5, /* 8   */
+	OSD_ATTR_CC_CHANGE_IN_USED_CAPACITY            = 0x6, /* 8   */
+};
+
+/*TBD: osdv1_current_command_attributes_page */
+
+struct osdv2_current_command_attributes_page {
+	struct osd_attr_page_header hdr;  /* id=0xFFFFFFFE, size=0x44 */
+	u8 response_integrity_check_value[OSD_CRYPTO_KEYID_SIZE];
+	u8 object_type;
+	u8 reserved[3];
+	__be64 partition_id;
+	__be64 object_id;
+	__be64 starting_byte_address_of_append;
+	__be64 change_in_used_capacity;
+};
+
 #endif /*ndef __OSD_ATTRIBUTES_H__*/

index 1ce6b24..15f0bbc 100644
@@ -118,39 +118,39 @@ static int _osd_print_system_info(struct osd_dev *od, void *caps)
 		_osd_ver_desc(or));
 
 	pFirst = get_attrs[a++].val_ptr;
-	OSD_INFO("OSD_ATTR_RI_VENDOR_IDENTIFICATION [%s]\n",
+	OSD_INFO("VENDOR_IDENTIFICATION  [%s]\n",
 		(char *)pFirst);
 
 	pFirst = get_attrs[a++].val_ptr;
-	OSD_INFO("OSD_ATTR_RI_PRODUCT_IDENTIFICATION [%s]\n",
+	OSD_INFO("PRODUCT_IDENTIFICATION [%s]\n",
 		(char *)pFirst);
 
 	pFirst = get_attrs[a++].val_ptr;
-	OSD_INFO("OSD_ATTR_RI_PRODUCT_MODEL [%s]\n",
+	OSD_INFO("PRODUCT_MODEL          [%s]\n",
 		(char *)pFirst);
 
 	pFirst = get_attrs[a++].val_ptr;
-	OSD_INFO("OSD_ATTR_RI_PRODUCT_REVISION_LEVEL [%u]\n",
+	OSD_INFO("PRODUCT_REVISION_LEVEL [%u]\n",
 		pFirst ? get_unaligned_be32(pFirst) : ~0U);
 
 	pFirst = get_attrs[a++].val_ptr;
-	OSD_INFO("OSD_ATTR_RI_PRODUCT_SERIAL_NUMBER [%s]\n",
+	OSD_INFO("PRODUCT_SERIAL_NUMBER  [%s]\n",
 		(char *)pFirst);
 
 	pFirst = get_attrs[a].val_ptr;
-	OSD_INFO("OSD_ATTR_RI_OSD_NAME [%s]\n", (char *)pFirst);
+	OSD_INFO("OSD_NAME               [%s]\n", (char *)pFirst);
 	a++;
 
 	pFirst = get_attrs[a++].val_ptr;
-	OSD_INFO("OSD_ATTR_RI_TOTAL_CAPACITY [0x%llx]\n",
+	OSD_INFO("TOTAL_CAPACITY         [0x%llx]\n",
 		pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL);
 
 	pFirst = get_attrs[a++].val_ptr;
-	OSD_INFO("OSD_ATTR_RI_USED_CAPACITY [0x%llx]\n",
+	OSD_INFO("USED_CAPACITY          [0x%llx]\n",
 		pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL);
 
 	pFirst = get_attrs[a++].val_ptr;
-	OSD_INFO("OSD_ATTR_RI_NUMBER_OF_PARTITIONS [%llu]\n",
+	OSD_INFO("NUMBER_OF_PARTITIONS   [%llu]\n",
 		pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL);
 
 	if (a >= nelem)

@@ -158,7 +158,7 @@ static int _osd_print_system_info(struct osd_dev *od, void *caps)
 
 	/* 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",
+	OSD_INFO("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]);

@@ -169,7 +169,8 @@ static int _osd_print_system_info(struct osd_dev *od, void *caps)
 
 		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);
+		OSD_INFO("OSD_SYSTEM_ID(%d)\n"
+			 "        [%s]\n", len, sid_dump);
 		a++;
 	}
 out:

index 15f0bbc..c98153b 100644
@@ -789,6 +789,20 @@ void osd_req_write(struct osd_request *or,
 }
 EXPORT_SYMBOL(osd_req_write);
 
+int osd_req_write_kern(struct osd_request *or,
+	const struct osd_obj_id *obj, u64 offset, void* buff, u64 len)
+{
+	struct request_queue *req_q = or->osd_dev->scsi_device->request_queue;
+	struct bio *bio = bio_map_kern(req_q, buff, len, GFP_KERNEL);
+
+	if (IS_ERR(bio))
+		return PTR_ERR(bio);
+
+	osd_req_write(or, obj, bio, offset);
+	return 0;
+}
+EXPORT_SYMBOL(osd_req_write_kern);
+
 /*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 *,

@@ -824,6 +838,20 @@ void osd_req_read(struct osd_request *or,
 }
 EXPORT_SYMBOL(osd_req_read);
 
+int osd_req_read_kern(struct osd_request *or,
+	const struct osd_obj_id *obj, u64 offset, void* buff, u64 len)
+{
+	struct request_queue *req_q = or->osd_dev->scsi_device->request_queue;
+	struct bio *bio = bio_map_kern(req_q, buff, len, GFP_KERNEL);
+
+	if (IS_ERR(bio))
+		return PTR_ERR(bio);
+
+	osd_req_read(or, obj, bio, offset);
+	return 0;
+}
+EXPORT_SYMBOL(osd_req_read_kern);
+
 void osd_req_get_attributes(struct osd_request *or,
 	const struct osd_obj_id *obj)
 {

index b1512c4..24667ee 100644
@@ -175,10 +175,4 @@ int exofs_async_op(struct osd_request *or,
 
 int extract_attr_from_req(struct osd_request *or, struct osd_attr *attr);
 
-int osd_req_read_kern(struct osd_request *or,
-	const struct osd_obj_id *obj, u64 offset, void *buff, u64 len);
-
-int osd_req_write_kern(struct osd_request *or,
-	const struct osd_obj_id *obj, u64 offset, void *buff, u64 len);
-
 #endif /*ifndef __EXOFS_COM_H__*/

index b249ae9..48cc4d1 100644
@@ -125,29 +125,3 @@ int extract_attr_from_req(struct osd_request *or, struct osd_attr *attr)
 
 	return -EIO;
 }
-
-int osd_req_read_kern(struct osd_request *or,
-	const struct osd_obj_id *obj, u64 offset, void* buff, u64 len)
-{
-	struct request_queue *req_q = or->osd_dev->scsi_device->request_queue;
-	struct bio *bio = bio_map_kern(req_q, buff, len, GFP_KERNEL);
-
-	if (!bio)
-		return -ENOMEM;
-
-	osd_req_read(or, obj, bio, offset);
-	return 0;
-}
-
-int osd_req_write_kern(struct osd_request *or,
-	const struct osd_obj_id *obj, u64 offset, void* buff, u64 len)
-{
-	struct request_queue *req_q = or->osd_dev->scsi_device->request_queue;
-	struct bio *bio = bio_map_kern(req_q, buff, len, GFP_KERNEL);
-
-	if (!bio)
-		return -ENOMEM;
-
-	osd_req_write(or, obj, bio, offset);
-	return 0;
-}

index b24d961..6132790 100644
@@ -364,6 +364,8 @@ 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);
+int osd_req_write_kern(struct osd_request *or,
+	const struct osd_obj_id *obj, u64 offset, void *buff, u64 len);
 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,

@@ -379,6 +381,8 @@ void osd_req_flush_object(struct osd_request *or,
 
 void osd_req_read(struct osd_request *or,
 	const struct osd_obj_id *, struct bio *data_in, u64 offset);
+int osd_req_read_kern(struct osd_request *or,
+	const struct osd_obj_id *obj, u64 offset, void *buff, u64 len);
 
 /*
  * Root/Partition/Collection/Object Attributes commands

index c98153b..ba2ebae 100644
@@ -1262,7 +1262,7 @@ static inline void osd_sec_parms_set_in_offset(bool is_v1,
 }
 
 static int _osd_req_finalize_data_integrity(struct osd_request *or,
-	bool has_in, bool has_out, const u8 *cap_key)
+	bool has_in, bool has_out, u64 out_data_bytes, const u8 *cap_key)
 {
 	struct osd_security_parameters *sec_parms = _osd_req_sec_params(or);
 	int ret;

@@ -1277,8 +1277,7 @@ static int _osd_req_finalize_data_integrity(struct osd_request *or,
 		};
 		unsigned pad;
 
-		or->out_data_integ.data_bytes = cpu_to_be64(
-			or->out.bio ? or->out.bio->bi_size : 0);
+		or->out_data_integ.data_bytes = cpu_to_be64(out_data_bytes);
 		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(

@@ -1370,6 +1369,7 @@ int osd_finalize_request(struct osd_request *or,
 {
 	struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
 	bool has_in, has_out;
+	u64 out_data_bytes = or->out.total_bytes;
 	int ret;
 
 	if (options & OSD_REQ_FUA)

@@ -1439,7 +1439,8 @@ int osd_finalize_request(struct osd_request *or,
 		}
 	}
 
-	ret = _osd_req_finalize_data_integrity(or, has_in, has_out, cap_key);
+	ret = _osd_req_finalize_data_integrity(or, has_in, has_out,
+					       out_data_bytes, cap_key);
 	if (ret)
 		return ret;
 

index ba2ebae..3f5ec57 100644
@@ -779,13 +779,14 @@ EXPORT_SYMBOL(osd_req_remove_object);
 */
 
 void osd_req_write(struct osd_request *or,
-	const struct osd_obj_id *obj, struct bio *bio, u64 offset)
+	const struct osd_obj_id *obj, u64 offset,
+	struct bio *bio, u64 len)
 {
-	_osd_req_encode_common(or, OSD_ACT_WRITE, obj, offset, bio->bi_size);
+	_osd_req_encode_common(or, OSD_ACT_WRITE, obj, offset, len);
 	WARN_ON(or->out.bio || or->out.total_bytes);
-	bio->bi_rw |= (1 << BIO_RW);
+	WARN_ON(0 ==  bio_rw_flagged(bio, BIO_RW));
 	or->out.bio = bio;
-	or->out.total_bytes = bio->bi_size;
+	or->out.total_bytes = len;
 }
 EXPORT_SYMBOL(osd_req_write);
 

@@ -798,7 +799,8 @@ int osd_req_write_kern(struct osd_request *or,
 	if (IS_ERR(bio))
 		return PTR_ERR(bio);
 
-	osd_req_write(or, obj, bio, offset);
+	bio->bi_rw |= (1 << BIO_RW); /* FIXME: bio_set_dir() */
+	osd_req_write(or, obj, offset, bio, len);
 	return 0;
 }
 EXPORT_SYMBOL(osd_req_write_kern);

@@ -828,13 +830,14 @@ void osd_req_flush_object(struct osd_request *or,
 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)
+	const struct osd_obj_id *obj, u64 offset,
+	struct bio *bio, u64 len)
 {
-	_osd_req_encode_common(or, OSD_ACT_READ, obj, offset, bio->bi_size);
+	_osd_req_encode_common(or, OSD_ACT_READ, obj, offset, len);
 	WARN_ON(or->in.bio || or->in.total_bytes);
-	bio->bi_rw &= ~(1 << BIO_RW);
+	WARN_ON(1 == bio_rw_flagged(bio, BIO_RW));
 	or->in.bio = bio;
-	or->in.total_bytes = bio->bi_size;
+	or->in.total_bytes = len;
 }
 EXPORT_SYMBOL(osd_req_read);
 

@@ -847,7 +850,7 @@ int osd_req_read_kern(struct osd_request *or,
 	if (IS_ERR(bio))
 		return PTR_ERR(bio);
 
-	osd_req_read(or, obj, bio, offset);
+	osd_req_read(or, obj, offset, bio, len);
 	return 0;
 }
 EXPORT_SYMBOL(osd_req_read_kern);

index ba8d9fa..f79e8e5 100644
@@ -266,7 +266,7 @@ static int read_exec(struct page_collect *pcol, bool is_sync)
 		goto err;
 	}
 
-	osd_req_read(or, &obj, pcol->bio, i_start);
+	osd_req_read(or, &obj, i_start, pcol->bio, pcol->length);
 
 	if (is_sync) {
 		exofs_sync_op(or, pcol->sbi->s_timeout, oi->i_cred);

@@ -522,7 +522,8 @@ static int write_exec(struct page_collect *pcol)
 
 	*pcol_copy = *pcol;
 
-	osd_req_write(or, &obj, pcol_copy->bio, i_start);
+	pcol_copy->bio->bi_rw |= (1 << BIO_RW); /* FIXME: bio_set_dir() */
+	osd_req_write(or, &obj, i_start, pcol_copy->bio, pcol_copy->length);
 	ret = exofs_async_op(or, writepages_done, pcol_copy, oi->i_cred);
 	if (unlikely(ret)) {
 		EXOFS_ERR("write_exec: exofs_async_op() Faild\n");

index 6132790..8c1e3b8 100644
@@ -363,7 +363,7 @@ 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);
+	const struct osd_obj_id *obj, u64 offset, struct bio *bio, u64 len);
 int osd_req_write_kern(struct osd_request *or,
 	const struct osd_obj_id *obj, u64 offset, void *buff, u64 len);
 void osd_req_append(struct osd_request *or,

@@ -380,7 +380,7 @@ void osd_req_flush_object(struct osd_request *or,
 	/*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);
+	const struct osd_obj_id *obj, u64 offset, struct bio *bio, u64 len);
 int osd_req_read_kern(struct osd_request *or,
 	const struct osd_obj_id *obj, u64 offset, void *buff, u64 len);
 

index 3f5ec57..3959797 100644
@@ -670,7 +670,7 @@ 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;
+	struct request_queue *q = osd_request_queue(or->osd_dev);
 	u64 len = nelem * sizeof(osd_id) + sizeof(*list);
 	struct bio *bio;
 

@@ -793,7 +793,7 @@ EXPORT_SYMBOL(osd_req_write);
 int osd_req_write_kern(struct osd_request *or,
 	const struct osd_obj_id *obj, u64 offset, void* buff, u64 len)
 {
-	struct request_queue *req_q = or->osd_dev->scsi_device->request_queue;
+	struct request_queue *req_q = osd_request_queue(or->osd_dev);
 	struct bio *bio = bio_map_kern(req_q, buff, len, GFP_KERNEL);
 
 	if (IS_ERR(bio))

@@ -844,7 +844,7 @@ EXPORT_SYMBOL(osd_req_read);
 int osd_req_read_kern(struct osd_request *or,
 	const struct osd_obj_id *obj, u64 offset, void* buff, u64 len)
 {
-	struct request_queue *req_q = or->osd_dev->scsi_device->request_queue;
+	struct request_queue *req_q = osd_request_queue(or->osd_dev);
 	struct bio *bio = bio_map_kern(req_q, buff, len, GFP_KERNEL);
 
 	if (IS_ERR(bio))

index f79e8e5..77d0a29 100644
@@ -59,10 +59,9 @@ static void _pcol_init(struct page_collect *pcol, unsigned expected_pages,
 		struct inode *inode)
 {
 	struct exofs_sb_info *sbi = inode->i_sb->s_fs_info;
-	struct request_queue *req_q = sbi->s_dev->scsi_device->request_queue;
 
 	pcol->sbi = sbi;
-	pcol->req_q = req_q;
+	pcol->req_q = osd_request_queue(sbi->s_dev);
 	pcol->inode = inode;
 	pcol->expected_pages = expected_pages;
 

index 8c1e3b8..b44dc53 100644
@@ -18,6 +18,7 @@
 #include "osd_types.h"
 
 #include <linux/blkdev.h>
+#include <scsi/scsi_device.h>
 
 /* Note: "NI" in comments below means "Not Implemented yet" */
 

@@ -69,6 +70,10 @@ 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 */
+static inline struct request_queue *osd_request_queue(struct osd_dev *od)
+{
+	return od->scsi_device->request_queue;
+}
 
 /* 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)

index 22b59e1..0bdef33 100644
@@ -49,6 +49,7 @@
 #include <linux/device.h>
 #include <linux/idr.h>
 #include <linux/major.h>
+#include <linux/file.h>
 
 #include <scsi/scsi.h>
 #include <scsi/scsi_driver.h>

@@ -175,10 +176,9 @@ static const struct file_operations osd_fops = {
 
 struct osd_dev *osduld_path_lookup(const char *name)
 {
-	struct path path;
-	struct inode *inode;
-	struct cdev *cdev;
-	struct osd_uld_device *uninitialized_var(oud);
+	struct osd_uld_device *oud;
+	struct osd_dev *od;
+	struct file *file;
 	int error;
 
 	if (!name || !*name) {

@@ -186,52 +186,46 @@ struct osd_dev *osduld_path_lookup(const char *name)
 		return ERR_PTR(-EINVAL);
 	}
 
-	error = kern_path(name, LOOKUP_FOLLOW, &path);
-	if (error) {
-		OSD_ERR("path_lookup of %s failed=>%d\n", name, error);
-		return ERR_PTR(error);
-	}
+	od = kzalloc(sizeof(*od), GFP_KERNEL);
+	if (!od)
+		return ERR_PTR(-ENOMEM);
 
-	inode = 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;
+	file = filp_open(name, O_RDWR, 0);
+	if (IS_ERR(file)) {
+		error = PTR_ERR(file);
+		goto free_od;
 	}
 
-	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", name);
-		OSD_ERR("  Example: bash: echo < %s\n", name);
-		goto out;
+	if (file->f_op != &osd_fops){
+		error = -EINVAL;
+		goto close_file;
 	}
 
-	/* 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", name);
-		goto out;
-	}
+	oud = file->private_data;
 
-	oud = container_of(cdev, struct osd_uld_device, cdev);
+	*od = oud->od;
+	od->file = file;
 
-	__uld_get(oud);
-	error = 0;
+	return od;
 
-out:
-	path_put(&path);
-	return error ? ERR_PTR(error) : &oud->od;
+close_file:
+	fput(file);
+free_od:
+	kfree(od);
+	return ERR_PTR(error);
 }
 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);
+	if (od && !IS_ERR(od)) {
+		struct osd_uld_device *oud = od->file->private_data;
+
+		BUG_ON(od->scsi_device != oud->od.scsi_device);
+
+		fput(od->file);
+		kfree(od);
 	}
 }
 EXPORT_SYMBOL(osduld_put_device);

index b44dc53..02bd9f7 100644
@@ -48,6 +48,7 @@ enum osd_std_version {
  */
 struct osd_dev {
 	struct scsi_device *scsi_device;
+	struct file *file;
 	unsigned def_timeout;
 
 #ifdef OSD_VER1_SUPPORT

index 3959797..71341ad 100644
@@ -1340,6 +1340,8 @@ static int _init_blk_request(struct osd_request *or,
 
 	or->request = req;
 	req->cmd_type = REQ_TYPE_BLOCK_PC;
+	req->cmd_flags |= REQ_QUIET;
+
 	req->timeout = or->timeout;
 	req->retries = or->retries;
 	req->sense = or->sense;