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b14f8ab284
This patch includes osd infrastructure that will be used later by the file system. Also the declarations of constants, on disk structures, and prototypes. And the Kbuild+Kconfig files needed to build the exofs module. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
153 lines
3.9 KiB
C
153 lines
3.9 KiB
C
/*
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* Copyright (C) 2005, 2006
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* Avishay Traeger (avishay@gmail.com) (avishay@il.ibm.com)
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* Copyright (C) 2005, 2006
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* International Business Machines
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* Copyright (C) 2008, 2009
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* Boaz Harrosh <bharrosh@panasas.com>
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*
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* This file is part of exofs.
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*
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* exofs is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation. Since it is based on ext2, and the only
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* valid version of GPL for the Linux kernel is version 2, the only valid
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* version of GPL for exofs is version 2.
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*
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* exofs is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with exofs; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <scsi/scsi_device.h>
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#include <scsi/osd_sense.h>
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#include "exofs.h"
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int exofs_check_ok_resid(struct osd_request *or, u64 *in_resid, u64 *out_resid)
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{
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struct osd_sense_info osi;
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int ret = osd_req_decode_sense(or, &osi);
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if (ret) { /* translate to Linux codes */
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if (osi.additional_code == scsi_invalid_field_in_cdb) {
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if (osi.cdb_field_offset == OSD_CFO_STARTING_BYTE)
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ret = -EFAULT;
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if (osi.cdb_field_offset == OSD_CFO_OBJECT_ID)
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ret = -ENOENT;
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else
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ret = -EINVAL;
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} else if (osi.additional_code == osd_quota_error)
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ret = -ENOSPC;
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else
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ret = -EIO;
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}
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/* FIXME: should be include in osd_sense_info */
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if (in_resid)
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*in_resid = or->in.req ? or->in.req->data_len : 0;
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if (out_resid)
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*out_resid = or->out.req ? or->out.req->data_len : 0;
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return ret;
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}
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void exofs_make_credential(u8 cred_a[OSD_CAP_LEN], const struct osd_obj_id *obj)
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{
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osd_sec_init_nosec_doall_caps(cred_a, obj, false, true);
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}
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/*
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* Perform a synchronous OSD operation.
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*/
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int exofs_sync_op(struct osd_request *or, int timeout, uint8_t *credential)
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{
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int ret;
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or->timeout = timeout;
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ret = osd_finalize_request(or, 0, credential, NULL);
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if (ret) {
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EXOFS_DBGMSG("Faild to osd_finalize_request() => %d\n", ret);
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return ret;
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}
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ret = osd_execute_request(or);
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if (ret)
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EXOFS_DBGMSG("osd_execute_request() => %d\n", ret);
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/* osd_req_decode_sense(or, ret); */
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return ret;
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}
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/*
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* Perform an asynchronous OSD operation.
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*/
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int exofs_async_op(struct osd_request *or, osd_req_done_fn *async_done,
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void *caller_context, u8 *cred)
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{
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int ret;
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ret = osd_finalize_request(or, 0, cred, NULL);
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if (ret) {
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EXOFS_DBGMSG("Faild to osd_finalize_request() => %d\n", ret);
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return ret;
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}
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ret = osd_execute_request_async(or, async_done, caller_context);
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if (ret)
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EXOFS_DBGMSG("osd_execute_request_async() => %d\n", ret);
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return ret;
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}
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int extract_attr_from_req(struct osd_request *or, struct osd_attr *attr)
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{
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struct osd_attr cur_attr = {.attr_page = 0}; /* start with zeros */
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void *iter = NULL;
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int nelem;
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do {
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nelem = 1;
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osd_req_decode_get_attr_list(or, &cur_attr, &nelem, &iter);
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if ((cur_attr.attr_page == attr->attr_page) &&
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(cur_attr.attr_id == attr->attr_id)) {
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attr->len = cur_attr.len;
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attr->val_ptr = cur_attr.val_ptr;
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return 0;
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}
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} while (iter);
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return -EIO;
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}
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int osd_req_read_kern(struct osd_request *or,
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const struct osd_obj_id *obj, u64 offset, void* buff, u64 len)
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{
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struct request_queue *req_q = or->osd_dev->scsi_device->request_queue;
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struct bio *bio = bio_map_kern(req_q, buff, len, GFP_KERNEL);
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if (!bio)
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return -ENOMEM;
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osd_req_read(or, obj, bio, offset);
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return 0;
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}
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int osd_req_write_kern(struct osd_request *or,
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const struct osd_obj_id *obj, u64 offset, void* buff, u64 len)
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{
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struct request_queue *req_q = or->osd_dev->scsi_device->request_queue;
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struct bio *bio = bio_map_kern(req_q, buff, len, GFP_KERNEL);
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if (!bio)
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return -ENOMEM;
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osd_req_write(or, obj, bio, offset);
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return 0;
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}
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