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tegrakernel/kernel/kernel-4.9/drivers/scsi/osd/osd_initiator.c

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/*
* osd_initiator - Main body of the osd initiator library.
*
* Note: The file does not contain the advanced security functionality which
* is only needed by the security_manager's initiators.
*
* Copyright (C) 2008 Panasas Inc. All rights reserved.
*
* Authors:
* Boaz Harrosh <ooo@electrozaur.com>
* Benny Halevy <bhalevy@panasas.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Panasas company nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/slab.h>
#include <linux/module.h>
#include <scsi/osd_initiator.h>
#include <scsi/osd_sec.h>
#include <scsi/osd_attributes.h>
#include <scsi/osd_sense.h>
#include <scsi/scsi_device.h>
#include "osd_debug.h"
#ifndef __unused
# define __unused __attribute__((unused))
#endif
enum { OSD_REQ_RETRIES = 1 };
MODULE_AUTHOR("Boaz Harrosh <ooo@electrozaur.com>");
MODULE_DESCRIPTION("open-osd initiator library libosd.ko");
MODULE_LICENSE("GPL");
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 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_get_print_system_info(struct osd_dev *od,
void *caps, struct osd_dev_info *odi)
{
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("VENDOR_IDENTIFICATION [%s]\n",
(char *)pFirst);
pFirst = get_attrs[a++].val_ptr;
OSD_INFO("PRODUCT_IDENTIFICATION [%s]\n",
(char *)pFirst);
pFirst = get_attrs[a++].val_ptr;
OSD_INFO("PRODUCT_MODEL [%s]\n",
(char *)pFirst);
pFirst = get_attrs[a++].val_ptr;
OSD_INFO("PRODUCT_REVISION_LEVEL [%u]\n",
pFirst ? get_unaligned_be32(pFirst) : ~0U);
pFirst = get_attrs[a++].val_ptr;
OSD_INFO("PRODUCT_SERIAL_NUMBER [%s]\n",
(char *)pFirst);
odi->osdname_len = get_attrs[a].len;
/* Avoid NULL for memcmp optimization 0-length is good enough */
odi->osdname = kzalloc(odi->osdname_len + 1, GFP_KERNEL);
if (!odi->osdname) {
ret = -ENOMEM;
goto out;
}
if (odi->osdname_len)
memcpy(odi->osdname, get_attrs[a].val_ptr, odi->osdname_len);
OSD_INFO("OSD_NAME [%s]\n", odi->osdname);
a++;
pFirst = get_attrs[a++].val_ptr;
OSD_INFO("TOTAL_CAPACITY [0x%llx]\n",
pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL);
pFirst = get_attrs[a++].val_ptr;
OSD_INFO("USED_CAPACITY [0x%llx]\n",
pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL);
pFirst = get_attrs[a++].val_ptr;
OSD_INFO("NUMBER_OF_PARTITIONS [%llu]\n",
pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL);
if (a >= nelem)
goto out;
/* FIXME: Where are the time utilities */
pFirst = get_attrs[a++].val_ptr;
OSD_INFO("CLOCK [0x%6phN]\n", pFirst);
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_SYSTEM_ID(%d)\n"
" [%s]\n", len, sid_dump);
if (unlikely(len > sizeof(odi->systemid))) {
OSD_ERR("OSD Target error: OSD_SYSTEM_ID too long(%d). "
"device identification might not work\n", len);
len = sizeof(odi->systemid);
}
odi->systemid_len = len;
memcpy(odi->systemid, get_attrs[a].val_ptr, len);
a++;
}
out:
osd_end_request(or);
return ret;
}
int osd_auto_detect_ver(struct osd_dev *od,
void *caps, struct osd_dev_info *odi)
{
int ret;
/* Auto-detect the osd version */
ret = _osd_get_print_system_info(od, caps, odi);
if (ret) {
osd_dev_set_ver(od, OSD_VER1);
OSD_DEBUG("converting to OSD1\n");
ret = _osd_get_print_system_info(od, caps, odi);
}
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;
}
static unsigned _osd_req_alist_elem_size(struct osd_request *or, unsigned len)
{
return osd_req_is_ver1(or) ?
osdv1_attr_list_elem_size(len) :
osdv2_attr_list_elem_size(len);
}
static void _osd_req_alist_elem_encode(struct osd_request *or,
void *attr_last, const struct osd_attr *oa)
{
if (osd_req_is_ver1(or)) {
struct osdv1_attributes_list_element *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);
} else {
struct osdv2_attributes_list_element *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);
}
}
static int _osd_req_alist_elem_decode(struct osd_request *or,
void *cur_p, struct osd_attr *oa, unsigned max_bytes)
{
unsigned inc;
if (osd_req_is_ver1(or)) {
struct osdv1_attributes_list_element *attr = cur_p;
if (max_bytes < sizeof(*attr))
return -1;
oa->len = be16_to_cpu(attr->attr_bytes);
inc = _osd_req_alist_elem_size(or, oa->len);
if (inc > max_bytes)
return -1;
oa->attr_page = be32_to_cpu(attr->attr_page);
oa->attr_id = be32_to_cpu(attr->attr_id);
/* OSD1: On empty attributes we return a pointer to 2 bytes
* of zeros. This keeps similar behaviour with OSD2.
* (See below)
*/
oa->val_ptr = likely(oa->len) ? attr->attr_val :
(u8 *)&attr->attr_bytes;
} else {
struct osdv2_attributes_list_element *attr = cur_p;
if (max_bytes < sizeof(*attr))
return -1;
oa->len = be16_to_cpu(attr->attr_bytes);
inc = _osd_req_alist_elem_size(or, oa->len);
if (inc > max_bytes)
return -1;
oa->attr_page = be32_to_cpu(attr->attr_page);
oa->attr_id = be32_to_cpu(attr->attr_id);
/* OSD2: For convenience, on empty attributes, we return 8 bytes
* of zeros here. This keeps the same behaviour with OSD2r04,
* and is nice with null terminating ASCII fields.
* oa->val_ptr == NULL marks the end-of-list, or error.
*/
oa->val_ptr = likely(oa->len) ? attr->attr_val : attr->reserved;
}
return inc;
}
static unsigned _osd_req_alist_size(struct osd_request *or, void *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 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)
{
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;
}
}
static bool _osd_req_is_alist_type(struct osd_request *or,
void *list, int list_type)
{
if (!list)
return false;
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;
}
}
/* 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);
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,
osd_req_is_ver1(or) ?
OSDv1_OFFSET_MIN_SHIFT : OSD_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;
if (osd_req_is_ver1(or))
return (struct osd_security_parameters *)&ocdb->v1.sec_params;
else
return (struct osd_security_parameters *)&ocdb->v2.sec_params;
}
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);
void osd_dev_fini(struct osd_dev *osdd)
{
/* TODO: De-allocate pools */
osdd->scsi_device = NULL;
}
EXPORT_SYMBOL(osd_dev_fini);
static struct osd_request *_osd_request_alloc(gfp_t gfp)
{
struct osd_request *or;
/* TODO: Use mempool with one saved request */
or = kzalloc(sizeof(*or), gfp);
return or;
}
static void _osd_request_free(struct osd_request *or)
{
kfree(or);
}
struct osd_request *osd_start_request(struct osd_dev *dev, gfp_t gfp)
{
struct osd_request *or;
or = _osd_request_alloc(gfp);
if (!or)
return NULL;
or->osd_dev = dev;
or->alloc_flags = gfp;
or->timeout = dev->def_timeout;
or->retries = OSD_REQ_RETRIES;
return or;
}
EXPORT_SYMBOL(osd_start_request);
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;
}
static void _put_request(struct request *rq)
{
/*
* If osd_finalize_request() was called but the request was not
* executed through the block layer, then we must release BIOs.
* TODO: Keep error code in or->async_error. Need to audit all
* code paths.
*/
if (unlikely(rq->bio))
blk_end_request(rq, -ENOMEM, blk_rq_bytes(rq));
else
blk_put_request(rq);
}
void osd_end_request(struct osd_request *or)
{
struct request *rq = or->request;
if (rq) {
if (rq->next_rq) {
_put_request(rq->next_rq);
rq->next_rq = NULL;
}
_put_request(rq);
}
_osd_free_seg(or, &or->get_attr);
_osd_free_seg(or, &or->enc_get_attr);
_osd_free_seg(or, &or->set_attr);
_osd_free_seg(or, &or->cdb_cont);
_osd_request_free(or);
}
EXPORT_SYMBOL(osd_end_request);
static void _set_error_resid(struct osd_request *or, struct request *req,
int error)
{
or->async_error = error;
or->req_errors = req->errors ? : error;
or->sense_len = req->sense_len;
if (or->out.req)
or->out.residual = or->out.req->resid_len;
if (or->in.req)
or->in.residual = or->in.req->resid_len;
}
int osd_execute_request(struct osd_request *or)
{
int error = blk_execute_rq(or->request->q, NULL, or->request, 0);
_set_error_resid(or, or->request, error);
return error;
}
EXPORT_SYMBOL(osd_execute_request);
static void osd_request_async_done(struct request *req, int error)
{
struct osd_request *or = req->end_io_data;
_set_error_resid(or, req, error);
if (req->next_rq) {
__blk_put_request(req->q, req->next_rq);
req->next_rq = NULL;
}
__blk_put_request(req->q, req);
or->request = NULL;
or->in.req = NULL;
or->out.req = NULL;
if (or->async_done)
or->async_done(or, or->async_private);
else
osd_end_request(or);
}
int osd_execute_request_async(struct osd_request *or,
osd_req_done_fn *done, void *private)
{
or->request->end_io_data = or;
or->async_private = private;
or->async_done = done;
blk_execute_rq_nowait(or->request->q, NULL, or->request, 0,
osd_request_async_done);
return 0;
}
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_cdb_cont(struct osd_request *or, unsigned total_bytes)
{
OSD_DEBUG("total_bytes=%d\n", total_bytes);
return _osd_realloc_seg(or, &or->cdb_cont, total_bytes);
}
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
*/
static void _osdv1_req_encode_common(struct osd_request *or,
__be16 act, const struct osd_obj_id *obj, u64 offset, u64 len)
{
struct osdv1_cdb *ocdb = &or->cdb.v1;
/*
* For speed, the commands
* OSD_ACT_PERFORM_SCSI_COMMAND , V1 0x8F7E, V2 0x8F7C
* OSD_ACT_SCSI_TASK_MANAGEMENT , V1 0x8F7F, V2 0x8F7D
* are not supported here. Should pass zero and set after the call
*/
act &= cpu_to_be16(~0x0080); /* V1 action code */
OSD_DEBUG("OSDv1 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.v1.length = cpu_to_be64(len);
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)
{
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);
}
/*
* 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,
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);
/*TODO: void osd_req_perform_scsi_command(struct osd_request *,
const u8 *cdb, ...); */
/*TODO: void osd_req_task_management(struct osd_request *, ...); */
/*
* Partition commands
*/
static void _osd_req_encode_partition(struct osd_request *or,
__be16 act, osd_id partition)
{
struct osd_obj_id par = {
.partition = partition,
.id = 0,
};
_osd_req_encode_common(or, act, &par, 0, 0);
}
void osd_req_create_partition(struct osd_request *or, osd_id partition)
{
_osd_req_encode_partition(or, OSD_ACT_CREATE_PARTITION, partition);
}
EXPORT_SYMBOL(osd_req_create_partition);
void osd_req_remove_partition(struct osd_request *or, osd_id partition)
{
_osd_req_encode_partition(or, OSD_ACT_REMOVE_PARTITION, 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)
{
struct request_queue *q = osd_request_queue(or->osd_dev);
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 (IS_ERR(bio)) {
OSD_ERR("!!! Failed to allocate list_objects BIO\n");
return PTR_ERR(bio);
}
bio_set_op_attrs(bio, REQ_OP_READ, 0);
or->in.bio = bio;
or->in.total_bytes = bio->bi_iter.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
*/
/*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)
{
return _osd_req_list_objects(or, OSD_ACT_LIST_COLLECTION, obj,
initial_id, list, nelem);
}
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)
{
_osd_req_encode_common(or, OSD_ACT_FLUSH_PARTITION, obj, 0, 0);
_osd_req_encode_flush(or, op);
}
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
*/
void osd_req_create_object(struct osd_request *or, struct osd_obj_id *obj)
{
_osd_req_encode_common(or, OSD_ACT_CREATE, obj, 0, 0);
}
EXPORT_SYMBOL(osd_req_create_object);
void osd_req_remove_object(struct osd_request *or, struct osd_obj_id *obj)
{
_osd_req_encode_common(or, OSD_ACT_REMOVE, obj, 0, 0);
}
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, u64 offset,
struct bio *bio, u64 len)
{
_osd_req_encode_common(or, OSD_ACT_WRITE, obj, offset, len);
WARN_ON(or->out.bio || or->out.total_bytes);
WARN_ON(!op_is_write(bio_op(bio)));
or->out.bio = bio;
or->out.total_bytes = len;
}
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 = osd_request_queue(or->osd_dev);
struct bio *bio = bio_map_kern(req_q, buff, len, GFP_KERNEL);
if (IS_ERR(bio))
return PTR_ERR(bio);
bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
osd_req_write(or, obj, offset, bio, len);
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 *,
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)
{
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);
}
EXPORT_SYMBOL(osd_req_flush_object);
void osd_req_read(struct osd_request *or,
const struct osd_obj_id *obj, u64 offset,
struct bio *bio, u64 len)
{
_osd_req_encode_common(or, OSD_ACT_READ, obj, offset, len);
WARN_ON(or->in.bio || or->in.total_bytes);
WARN_ON(op_is_write(bio_op(bio)));
or->in.bio = bio;
or->in.total_bytes = len;
}
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 = osd_request_queue(or->osd_dev);
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, offset, bio, len);
return 0;
}
EXPORT_SYMBOL(osd_req_read_kern);
static int _add_sg_continuation_descriptor(struct osd_request *or,
const struct osd_sg_entry *sglist, unsigned numentries, u64 *len)
{
struct osd_sg_continuation_descriptor *oscd;
u32 oscd_size;
unsigned i;
int ret;
oscd_size = sizeof(*oscd) + numentries * sizeof(oscd->entries[0]);
if (!or->cdb_cont.total_bytes) {
/* First time, jump over the header, we will write to:
* cdb_cont.buff + cdb_cont.total_bytes
*/
or->cdb_cont.total_bytes =
sizeof(struct osd_continuation_segment_header);
}
ret = _alloc_cdb_cont(or, or->cdb_cont.total_bytes + oscd_size);
if (unlikely(ret))
return ret;
oscd = or->cdb_cont.buff + or->cdb_cont.total_bytes;
oscd->hdr.type = cpu_to_be16(SCATTER_GATHER_LIST);
oscd->hdr.pad_length = 0;
oscd->hdr.length = cpu_to_be32(oscd_size - sizeof(*oscd));
*len = 0;
/* copy the sg entries and convert to network byte order */
for (i = 0; i < numentries; i++) {
oscd->entries[i].offset = cpu_to_be64(sglist[i].offset);
oscd->entries[i].len = cpu_to_be64(sglist[i].len);
*len += sglist[i].len;
}
or->cdb_cont.total_bytes += oscd_size;
OSD_DEBUG("total_bytes=%d oscd_size=%d numentries=%d\n",
or->cdb_cont.total_bytes, oscd_size, numentries);
return 0;
}
static int _osd_req_finalize_cdb_cont(struct osd_request *or, const u8 *cap_key)
{
struct request_queue *req_q = osd_request_queue(or->osd_dev);
struct bio *bio;
struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
struct osd_continuation_segment_header *cont_seg_hdr;
if (!or->cdb_cont.total_bytes)
return 0;
cont_seg_hdr = or->cdb_cont.buff;
cont_seg_hdr->format = CDB_CONTINUATION_FORMAT_V2;
cont_seg_hdr->service_action = cdbh->varlen_cdb.service_action;
/* create a bio for continuation segment */
bio = bio_map_kern(req_q, or->cdb_cont.buff, or->cdb_cont.total_bytes,
GFP_KERNEL);
if (IS_ERR(bio))
return PTR_ERR(bio);
bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
/* integrity check the continuation before the bio is linked
* with the other data segments since the continuation
* integrity is separate from the other data segments.
*/
osd_sec_sign_data(cont_seg_hdr->integrity_check, bio, cap_key);
cdbh->v2.cdb_continuation_length = cpu_to_be32(or->cdb_cont.total_bytes);
/* we can't use _req_append_segment, because we need to link in the
* continuation bio to the head of the bio list - the
* continuation segment (if it exists) is always the first segment in
* the out data buffer.
*/
bio->bi_next = or->out.bio;
or->out.bio = bio;
or->out.total_bytes += or->cdb_cont.total_bytes;
return 0;
}
/* osd_req_write_sg: Takes a @bio that points to the data out buffer and an
* @sglist that has the scatter gather entries. Scatter-gather enables a write
* of multiple none-contiguous areas of an object, in a single call. The extents
* may overlap and/or be in any order. The only constrain is that:
* total_bytes(sglist) >= total_bytes(bio)
*/
int osd_req_write_sg(struct osd_request *or,
const struct osd_obj_id *obj, struct bio *bio,
const struct osd_sg_entry *sglist, unsigned numentries)
{
u64 len;
int ret = _add_sg_continuation_descriptor(or, sglist, numentries, &len);
if (ret)
return ret;
osd_req_write(or, obj, 0, bio, len);
return 0;
}
EXPORT_SYMBOL(osd_req_write_sg);
/* osd_req_read_sg: Read multiple extents of an object into @bio
* See osd_req_write_sg
*/
int osd_req_read_sg(struct osd_request *or,
const struct osd_obj_id *obj, struct bio *bio,
const struct osd_sg_entry *sglist, unsigned numentries)
{
u64 len;
u64 off;
int ret;
if (numentries > 1) {
off = 0;
ret = _add_sg_continuation_descriptor(or, sglist, numentries,
&len);
if (ret)
return ret;
} else {
/* Optimize the case of single segment, read_sg is a
* bidi operation.
*/
len = sglist->len;
off = sglist->offset;
}
osd_req_read(or, obj, off, bio, len);
return 0;
}
EXPORT_SYMBOL(osd_req_read_sg);
/* SG-list write/read Kern API
*
* osd_req_{write,read}_sg_kern takes an array of @buff pointers and an array
* of sg_entries. @numentries indicates how many pointers and sg_entries there
* are. By requiring an array of buff pointers. This allows a caller to do a
* single write/read and scatter into multiple buffers.
* NOTE: Each buffer + len should not cross a page boundary.
*/
static struct bio *_create_sg_bios(struct osd_request *or,
void **buff, const struct osd_sg_entry *sglist, unsigned numentries)
{
struct request_queue *q = osd_request_queue(or->osd_dev);
struct bio *bio;
unsigned i;
bio = bio_kmalloc(GFP_KERNEL, numentries);
if (unlikely(!bio)) {
OSD_DEBUG("Failed to allocate BIO size=%u\n", numentries);
return ERR_PTR(-ENOMEM);
}
for (i = 0; i < numentries; i++) {
unsigned offset = offset_in_page(buff[i]);
struct page *page = virt_to_page(buff[i]);
unsigned len = sglist[i].len;
unsigned added_len;
BUG_ON(offset + len > PAGE_SIZE);
added_len = bio_add_pc_page(q, bio, page, len, offset);
if (unlikely(len != added_len)) {
OSD_DEBUG("bio_add_pc_page len(%d) != added_len(%d)\n",
len, added_len);
bio_put(bio);
return ERR_PTR(-ENOMEM);
}
}
return bio;
}
int osd_req_write_sg_kern(struct osd_request *or,
const struct osd_obj_id *obj, void **buff,
const struct osd_sg_entry *sglist, unsigned numentries)
{
struct bio *bio = _create_sg_bios(or, buff, sglist, numentries);
if (IS_ERR(bio))
return PTR_ERR(bio);
bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
osd_req_write_sg(or, obj, bio, sglist, numentries);
return 0;
}
EXPORT_SYMBOL(osd_req_write_sg_kern);
int osd_req_read_sg_kern(struct osd_request *or,
const struct osd_obj_id *obj, void **buff,
const struct osd_sg_entry *sglist, unsigned numentries)
{
struct bio *bio = _create_sg_bios(or, buff, sglist, numentries);
if (IS_ERR(bio))
return PTR_ERR(bio);
osd_req_read_sg(or, obj, bio, sglist, numentries);
return 0;
}
EXPORT_SYMBOL(osd_req_read_sg_kern);
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) {
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;
}
_osd_req_alist_elem_encode(or, attr_last, oa);
attr_last += elem_size;
++oa;
}
or->set_attr.total_bytes = total_bytes;
return 0;
}
EXPORT_SYMBOL(osd_req_add_set_attr_list);
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 = blk_rq_map_kern(io->req->q, io->req, pad_buff, padding,
or->alloc_flags);
if (ret)
return ret;
io->total_bytes += padding;
}
ret = blk_rq_map_kern(io->req->q, 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) {
int inc = _osd_req_alist_elem_decode(or, cur_p, oa,
returned_bytes - cur_bytes);
if (inc < 0) {
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;
cur_bytes = returned_bytes; /* break the caller loop */
break;
}
cur_bytes += inc;
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;
cdbh->attrs_page.get_attr_page = cpu_to_be32(page_id);
cdbh->attrs_page.get_attr_alloc_length = cpu_to_be32(max_page_len);
if (!set_one_attr || !set_one_attr->attr_page)
return 0; /* The set is optional */
or->set_attr.buff = set_one_attr->val_ptr;
or->set_attr.total_bytes = set_one_attr->len;
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);
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;
if (or->set_attr.total_bytes == 0)
return 0;
/* 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->set_attr, NULL,
&or->out);
return ret;
}
static inline void osd_sec_parms_set_out_offset(bool is_v1,
struct osd_security_parameters *sec_parms, osd_cdb_offset offset)
{
if (is_v1)
sec_parms->v1.data_out_integrity_check_offset = offset;
else
sec_parms->v2.data_out_integrity_check_offset = offset;
}
static inline void osd_sec_parms_set_in_offset(bool is_v1,
struct osd_security_parameters *sec_parms, osd_cdb_offset offset)
{
if (is_v1)
sec_parms->v1.data_in_integrity_check_offset = offset;
else
sec_parms->v2.data_in_integrity_check_offset = offset;
}
static int _osd_req_finalize_data_integrity(struct osd_request *or,
bool has_in, bool has_out, struct bio *out_data_bio, u64 out_data_bytes,
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(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(
or->enc_get_attr.total_bytes);
osd_sec_parms_set_out_offset(osd_req_is_ver1(or), sec_parms,
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, out_data_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;
osd_sec_parms_set_in_offset(osd_req_is_ver1(or), sec_parms,
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
*/
static struct request *_make_request(struct request_queue *q, bool has_write,
struct _osd_io_info *oii, gfp_t flags)
{
struct request *req;
struct bio *bio = oii->bio;
int ret;
req = blk_get_request(q, has_write ? WRITE : READ, flags);
if (IS_ERR(req))
return req;
blk_rq_set_block_pc(req);
for_each_bio(bio) {
struct bio *bounce_bio = bio;
blk_queue_bounce(req->q, &bounce_bio);
ret = blk_rq_append_bio(req, bounce_bio);
if (ret)
return ERR_PTR(ret);
}
return req;
}
static int _init_blk_request(struct osd_request *or,
bool has_in, bool has_out)
{
gfp_t flags = or->alloc_flags;
struct scsi_device *scsi_device = or->osd_dev->scsi_device;
struct request_queue *q = scsi_device->request_queue;
struct request *req;
int ret;
req = _make_request(q, has_out, has_out ? &or->out : &or->in, flags);
if (IS_ERR(req)) {
ret = PTR_ERR(req);
goto out;
}
or->request = req;
req->cmd_flags |= REQ_QUIET;
req->timeout = or->timeout;
req->retries = or->retries;
req->sense = or->sense;
req->sense_len = 0;
if (has_out) {
or->out.req = req;
if (has_in) {
/* allocate bidi request */
req = _make_request(q, false, &or->in, flags);
if (IS_ERR(req)) {
OSD_DEBUG("blk_get_request for bidi failed\n");
ret = PTR_ERR(req);
goto out;
}
blk_rq_set_block_pc(req);
or->in.req = or->request->next_rq = req;
}
} else if (has_in)
or->in.req = req;
ret = 0;
out:
OSD_DEBUG("or=%p has_in=%d has_out=%d => %d, %p\n",
or, has_in, has_out, ret, or->request);
return ret;
}
int osd_finalize_request(struct osd_request *or,
u8 options, const void *cap, const u8 *cap_key)
{
struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
bool has_in, has_out;
/* Save for data_integrity without the cdb_continuation */
struct bio *out_data_bio = or->out.bio;
u64 out_data_bytes = or->out.total_bytes;
int ret;
if (options & OSD_REQ_FUA)
cdbh->options |= OSD_CDB_FUA;
if (options & OSD_REQ_DPO)
cdbh->options |= OSD_CDB_DPO;
if (options & OSD_REQ_BYPASS_TIMESTAMPS)
cdbh->timestamp_control = OSD_CDB_BYPASS_TIMESTAMPS;
osd_set_caps(&or->cdb, cap);
has_in = or->in.bio || or->get_attr.total_bytes;
has_out = or->out.bio || or->cdb_cont.total_bytes ||
or->set_attr.total_bytes || or->enc_get_attr.total_bytes;
ret = _osd_req_finalize_cdb_cont(or, cap_key);
if (ret) {
OSD_DEBUG("_osd_req_finalize_cdb_cont failed\n");
return ret;
}
ret = _init_blk_request(or, has_in, has_out);
if (ret) {
OSD_DEBUG("_init_blk_request failed\n");
return ret;
}
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);
if (ret) {
OSD_DEBUG("_osd_req_finalize_attr_page failed\n");
return ret;
}
} 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;
}
}
ret = _osd_req_finalize_data_integrity(or, has_in, has_out,
out_data_bio, out_data_bytes,
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);
return 0;
}
EXPORT_SYMBOL(osd_finalize_request);
static bool _is_osd_security_code(int code)
{
return (code == osd_security_audit_value_frozen) ||
(code == osd_security_working_key_frozen) ||
(code == osd_nonce_not_unique) ||
(code == osd_nonce_timestamp_out_of_range) ||
(code == osd_invalid_dataout_buffer_integrity_check_value);
}
#define OSD_SENSE_PRINT1(fmt, a...) \
do { \
if (__cur_sense_need_output) \
OSD_ERR(fmt, ##a); \
} while (0)
#define OSD_SENSE_PRINT2(fmt, a...) OSD_SENSE_PRINT1(" " fmt, ##a)
int osd_req_decode_sense_full(struct osd_request *or,
struct osd_sense_info *osi, bool silent,
struct osd_obj_id *bad_obj_list __unused, int max_obj __unused,
struct osd_attr *bad_attr_list, int max_attr)
{
int sense_len, original_sense_len;
struct osd_sense_info local_osi;
struct scsi_sense_descriptor_based *ssdb;
void *cur_descriptor;
#if (CONFIG_SCSI_OSD_DPRINT_SENSE == 0)
const bool __cur_sense_need_output = false;
#else
bool __cur_sense_need_output = !silent;
#endif
int ret;
if (likely(!or->req_errors))
return 0;
osi = osi ? : &local_osi;
memset(osi, 0, sizeof(*osi));
ssdb = (typeof(ssdb))or->sense;
sense_len = or->sense_len;
if ((sense_len < (int)sizeof(*ssdb) || !ssdb->sense_key)) {
OSD_ERR("Block-layer returned error(0x%x) but "
"sense_len(%u) || key(%d) is empty\n",
or->req_errors, sense_len, ssdb->sense_key);
goto analyze;
}
if ((ssdb->response_code != 0x72) && (ssdb->response_code != 0x73)) {
OSD_ERR("Unrecognized scsi sense: rcode=%x length=%d\n",
ssdb->response_code, sense_len);
goto analyze;
}
osi->key = ssdb->sense_key;
osi->additional_code = be16_to_cpu(ssdb->additional_sense_code);
original_sense_len = ssdb->additional_sense_length + 8;
#if (CONFIG_SCSI_OSD_DPRINT_SENSE == 1)
if (__cur_sense_need_output)
__cur_sense_need_output = (osi->key > scsi_sk_recovered_error);
#endif
OSD_SENSE_PRINT1("Main Sense information key=0x%x length(%d, %d) "
"additional_code=0x%x async_error=%d errors=0x%x\n",
osi->key, original_sense_len, sense_len,
osi->additional_code, or->async_error,
or->req_errors);
if (original_sense_len < sense_len)
sense_len = original_sense_len;
cur_descriptor = ssdb->ssd;
sense_len -= sizeof(*ssdb);
while (sense_len > 0) {
struct scsi_sense_descriptor *ssd = cur_descriptor;
int cur_len = ssd->additional_length + 2;
sense_len -= cur_len;
if (sense_len < 0)
break; /* sense was truncated */
switch (ssd->descriptor_type) {
case scsi_sense_information:
case scsi_sense_command_specific_information:
{
struct scsi_sense_command_specific_data_descriptor
*sscd = cur_descriptor;
osi->command_info =
get_unaligned_be64(&sscd->information) ;
OSD_SENSE_PRINT2(
"command_specific_information 0x%llx \n",
_LLU(osi->command_info));
break;
}
case scsi_sense_key_specific:
{
struct scsi_sense_key_specific_data_descriptor
*ssks = cur_descriptor;
osi->sense_info = get_unaligned_be16(&ssks->value);
OSD_SENSE_PRINT2(
"sense_key_specific_information %u"
"sksv_cd_bpv_bp (0x%x)\n",
osi->sense_info, ssks->sksv_cd_bpv_bp);
break;
}
case osd_sense_object_identification:
{ /*FIXME: Keep first not last, Store in array*/
struct osd_sense_identification_data_descriptor
*osidd = cur_descriptor;
osi->not_initiated_command_functions =
le32_to_cpu(osidd->not_initiated_functions);
osi->completed_command_functions =
le32_to_cpu(osidd->completed_functions);
osi->obj.partition = be64_to_cpu(osidd->partition_id);
osi->obj.id = be64_to_cpu(osidd->object_id);
OSD_SENSE_PRINT2(
"object_identification pid=0x%llx oid=0x%llx\n",
_LLU(osi->obj.partition), _LLU(osi->obj.id));
OSD_SENSE_PRINT2(
"not_initiated_bits(%x) "
"completed_command_bits(%x)\n",
osi->not_initiated_command_functions,
osi->completed_command_functions);
break;
}
case osd_sense_response_integrity_check:
{
struct osd_sense_response_integrity_check_descriptor
*osricd = cur_descriptor;
const unsigned len =
sizeof(osricd->integrity_check_value);
char key_dump[len*4 + 2]; /* 2nibbles+space+ASCII */
hex_dump_to_buffer(osricd->integrity_check_value, len,
32, 1, key_dump, sizeof(key_dump), true);
OSD_SENSE_PRINT2("response_integrity [%s]\n", key_dump);
}
case osd_sense_attribute_identification:
{
struct osd_sense_attributes_data_descriptor
*osadd = cur_descriptor;
unsigned len = min(cur_len, sense_len);
struct osd_sense_attr *pattr = osadd->sense_attrs;
while (len >= sizeof(*pattr)) {
u32 attr_page = be32_to_cpu(pattr->attr_page);
u32 attr_id = be32_to_cpu(pattr->attr_id);
if (!osi->attr.attr_page) {
osi->attr.attr_page = attr_page;
osi->attr.attr_id = attr_id;
}
if (bad_attr_list && max_attr) {
bad_attr_list->attr_page = attr_page;
bad_attr_list->attr_id = attr_id;
bad_attr_list++;
max_attr--;
}
len -= sizeof(*pattr);
OSD_SENSE_PRINT2(
"osd_sense_attribute_identification"
"attr_page=0x%x attr_id=0x%x\n",
attr_page, attr_id);
}
}
/*These are not legal for OSD*/
case scsi_sense_field_replaceable_unit:
OSD_SENSE_PRINT2("scsi_sense_field_replaceable_unit\n");
break;
case scsi_sense_stream_commands:
OSD_SENSE_PRINT2("scsi_sense_stream_commands\n");
break;
case scsi_sense_block_commands:
OSD_SENSE_PRINT2("scsi_sense_block_commands\n");
break;
case scsi_sense_ata_return:
OSD_SENSE_PRINT2("scsi_sense_ata_return\n");
break;
default:
if (ssd->descriptor_type <= scsi_sense_Reserved_last)
OSD_SENSE_PRINT2(
"scsi_sense Reserved descriptor (0x%x)",
ssd->descriptor_type);
else
OSD_SENSE_PRINT2(
"scsi_sense Vendor descriptor (0x%x)",
ssd->descriptor_type);
}
cur_descriptor += cur_len;
}
analyze:
if (!osi->key) {
/* scsi sense is Empty, the request was never issued to target
* linux return code might tell us what happened.
*/
if (or->async_error == -ENOMEM)
osi->osd_err_pri = OSD_ERR_PRI_RESOURCE;
else
osi->osd_err_pri = OSD_ERR_PRI_UNREACHABLE;
ret = or->async_error;
} else if (osi->key <= scsi_sk_recovered_error) {
osi->osd_err_pri = 0;
ret = 0;
} else if (osi->additional_code == scsi_invalid_field_in_cdb) {
if (osi->cdb_field_offset == OSD_CFO_STARTING_BYTE) {
osi->osd_err_pri = OSD_ERR_PRI_CLEAR_PAGES;
ret = -EFAULT; /* caller should recover from this */
} else if (osi->cdb_field_offset == OSD_CFO_OBJECT_ID) {
osi->osd_err_pri = OSD_ERR_PRI_NOT_FOUND;
ret = -ENOENT;
} else if (osi->cdb_field_offset == OSD_CFO_PERMISSIONS) {
osi->osd_err_pri = OSD_ERR_PRI_NO_ACCESS;
ret = -EACCES;
} else {
osi->osd_err_pri = OSD_ERR_PRI_BAD_CRED;
ret = -EINVAL;
}
} else if (osi->additional_code == osd_quota_error) {
osi->osd_err_pri = OSD_ERR_PRI_NO_SPACE;
ret = -ENOSPC;
} else if (_is_osd_security_code(osi->additional_code)) {
osi->osd_err_pri = OSD_ERR_PRI_BAD_CRED;
ret = -EINVAL;
} else {
osi->osd_err_pri = OSD_ERR_PRI_EIO;
ret = -EIO;
}
if (!or->out.residual)
or->out.residual = or->out.total_bytes;
if (!or->in.residual)
or->in.residual = or->in.total_bytes;
return ret;
}
EXPORT_SYMBOL(osd_req_decode_sense_full);
/*
* Implementation of osd_sec.h API
* TODO: Move to a separate osd_sec.c file at a later stage.
*/
enum { OSD_SEC_CAP_V1_ALL_CAPS =
OSD_SEC_CAP_APPEND | OSD_SEC_CAP_OBJ_MGMT | OSD_SEC_CAP_REMOVE |
OSD_SEC_CAP_CREATE | OSD_SEC_CAP_SET_ATTR | OSD_SEC_CAP_GET_ATTR |
OSD_SEC_CAP_WRITE | OSD_SEC_CAP_READ | OSD_SEC_CAP_POL_SEC |
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)
{
struct osd_capability *cap = caps;
u8 type;
u8 descriptor_type;
if (likely(obj->id)) {
if (unlikely(is_collection)) {
type = OSD_SEC_OBJ_COLLECTION;
descriptor_type = is_v1 ? OSD_SEC_OBJ_DESC_OBJ :
OSD_SEC_OBJ_DESC_COL;
} else {
type = OSD_SEC_OBJ_USER;
descriptor_type = OSD_SEC_OBJ_DESC_OBJ;
}
WARN_ON(!obj->partition);
} else {
type = obj->partition ? OSD_SEC_OBJ_PARTITION :
OSD_SEC_OBJ_ROOT;
descriptor_type = OSD_SEC_OBJ_DESC_PAR;
}
memset(cap, 0, sizeof(*cap));
cap->h.format = OSD_SEC_CAP_FORMAT_VER1;
cap->h.integrity_algorithm__key_version = 0; /* MAKE_BYTE(0, 0); */
cap->h.security_method = OSD_SEC_NOSEC;
/* cap->expiration_time;
cap->AUDIT[30-10];
cap->discriminator[42-30];
cap->object_created_time; */
cap->h.object_type = type;
osd_sec_set_caps(&cap->h, OSD_SEC_CAP_V1_ALL_CAPS);
cap->h.object_descriptor_type = descriptor_type;
cap->od.obj_desc.policy_access_tag = 0;
cap->od.obj_desc.allowed_partition_id = cpu_to_be64(obj->partition);
cap->od.obj_desc.allowed_object_id = cpu_to_be64(obj->id);
}
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)
{
/* NOTE: They start at same address */
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
* 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;
}
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