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/*
* Copyright (C) 2005, 2006
* Avishay Traeger (avishay@gmail.com) (avishay@il.ibm.com)
* Copyright (C) 2005, 2006
* International Business Machines
* Copyright (C) 2008, 2009
* Boaz Harrosh <bharrosh@panasas.com>
*
* This file is part of exofs.
*
* exofs is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation. Since it is based on ext2, and the only
* valid version of GPL for the Linux kernel is version 2, the only valid
* version of GPL for exofs is version 2.
*
* exofs is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with exofs; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <scsi/scsi_device.h>
#include <scsi/osd_sense.h>
#include "exofs.h"
int exofs_check_ok_resid(struct osd_request *or, u64 *in_resid, u64 *out_resid)
{
struct osd_sense_info osi;
int ret = osd_req_decode_sense(or, &osi);
if (ret) { /* translate to Linux codes */
if (osi.additional_code == scsi_invalid_field_in_cdb) {
if (osi.cdb_field_offset == OSD_CFO_STARTING_BYTE)
ret = -EFAULT;
if (osi.cdb_field_offset == OSD_CFO_OBJECT_ID)
ret = -ENOENT;
else
ret = -EINVAL;
} else if (osi.additional_code == osd_quota_error)
ret = -ENOSPC;
else
ret = -EIO;
}
/* FIXME: should be include in osd_sense_info */
if (in_resid)
*in_resid = or->in.req ? or->in.req->resid_len : 0;
if (out_resid)
*out_resid = or->out.req ? or->out.req->resid_len : 0;
return ret;
}
void exofs_make_credential(u8 cred_a[OSD_CAP_LEN], const struct osd_obj_id *obj)
{
osd_sec_init_nosec_doall_caps(cred_a, obj, false, true);
}
/*
* Perform a synchronous OSD operation.
*/
int exofs_sync_op(struct osd_request *or, int timeout, uint8_t *credential)
{
int ret;
or->timeout = timeout;
ret = osd_finalize_request(or, 0, credential, NULL);
if (ret) {
EXOFS_DBGMSG("Faild to osd_finalize_request() => %d\n", ret);
return ret;
}
ret = osd_execute_request(or);
if (ret)
EXOFS_DBGMSG("osd_execute_request() => %d\n", ret);
/* osd_req_decode_sense(or, ret); */
return ret;
}
/*
* Perform an asynchronous OSD operation.
*/
int exofs_async_op(struct osd_request *or, osd_req_done_fn *async_done,
void *caller_context, u8 *cred)
{
int ret;
ret = osd_finalize_request(or, 0, cred, NULL);
if (ret) {
EXOFS_DBGMSG("Faild to osd_finalize_request() => %d\n", ret);
return ret;
}
ret = osd_execute_request_async(or, async_done, caller_context);
if (ret)
EXOFS_DBGMSG("osd_execute_request_async() => %d\n", ret);
return ret;
}
int extract_attr_from_req(struct osd_request *or, struct osd_attr *attr)
{
struct osd_attr cur_attr = {.attr_page = 0}; /* start with zeros */
void *iter = NULL;
int nelem;
do {
nelem = 1;
osd_req_decode_get_attr_list(or, &cur_attr, &nelem, &iter);
if ((cur_attr.attr_page == attr->attr_page) &&
(cur_attr.attr_id == attr->attr_id)) {
attr->len = cur_attr.len;
attr->val_ptr = cur_attr.val_ptr;
return 0;
}
} while (iter);
return -EIO;
}
int osd_req_read_kern(struct osd_request *or,
const struct osd_obj_id *obj, u64 offset, void* buff, u64 len)
{
struct request_queue *req_q = or->osd_dev->scsi_device->request_queue;
struct bio *bio = bio_map_kern(req_q, buff, len, GFP_KERNEL);
if (!bio)
return -ENOMEM;
osd_req_read(or, obj, bio, offset);
return 0;
}
int osd_req_write_kern(struct osd_request *or,
const struct osd_obj_id *obj, u64 offset, void* buff, u64 len)
{
struct request_queue *req_q = or->osd_dev->scsi_device->request_queue;
struct bio *bio = bio_map_kern(req_q, buff, len, GFP_KERNEL);
if (!bio)
return -ENOMEM;
osd_req_write(or, obj, bio, offset);
return 0;
}
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