/*
* 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.
*/
#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 <bharrosh@panasas.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%02x%02x%02x%02x%02x%02x]\n",
((char *)pFirst)[0], ((char *)pFirst)[1],
((char *)pFirst)[2], ((char *)pFirst)[3],
((char *)pFirst)[4], ((char *)pFirst)[5]);
if (a < nelem) { /* IBM-OSD-SIM bug, Might not have it */
unsigned len = get_attrs[a].len;
char sid_dump[32*4 + 2]; /* 2nibbles+space+ASCII */
hex_dump_to_buffer(get_attrs[a].val_ptr, len, 32, 1,
sid_dump, sizeof(sid_dump), true);
OSD_INFO("OSD_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 idetification 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, s