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-rw-r--r--fs/exofs/osd.c153
1 files changed, 153 insertions, 0 deletions
diff --git a/fs/exofs/osd.c b/fs/exofs/osd.c
new file mode 100644
index 0000000..b249ae9
--- /dev/null
+++ b/fs/exofs/osd.c
@@ -0,0 +1,153 @@
+/*
+ * 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->data_len : 0;
+
+ if (out_resid)
+ *out_resid = or->out.req ? or->out.req->data_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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