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linux/drivers/scsi/osd/osd_initiator.c
Rasmus Villemoes 9a2fcad8dc osd: fix signed char versus %02x issue 
If char is signed and one of these bytes happen to have a value outside
the ascii range, the corresponding output will consist of "ffffff"
followed by the two hex chars that were actually intended. One way to
fix it would be to change the casts to (u8*) aka
(unsigned char*), but it is much simpler (and generates smaller code)
to use the %ph extension which was created for such short hexdumps.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Acked-by: Boaz Harrosh <ooo@electrozaur.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2015-12-10 13:14:56 -05:00

2069 lines
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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->bi_rw &= ~REQ_WRITE;
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(0 == (bio->bi_rw & REQ_WRITE));
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->bi_rw |= REQ_WRITE; /* FIXME: bio_set_dir() */
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(bio->bi_rw & REQ_WRITE);
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->bi_rw |= REQ_WRITE;
/* 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->bi_rw |= REQ_WRITE;
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)
{
if (oii->bio)
return blk_make_request(q, oii->bio, flags);
else {
struct request *req;
req = blk_get_request(q, has_write ? WRITE : READ, flags);
if (IS_ERR(req))
return req;
blk_rq_set_block_pc(req);
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)
{
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)
{
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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