--- /dev/null
+/*
+ * 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 <bharrosh@panasas.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 <scsi/osd_initiator.h>
+#include <scsi/osd_sec.h>
+#include <scsi/scsi_device.h>
+
+#include "osd_debug.h"
+
+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 osdv1_cdb) != OSDv1_TOTAL_CDB_LEN);
+}
+
+static unsigned _osd_req_cdb_len(struct osd_request *or)
+{
+ return OSDv1_TOTAL_CDB_LEN;
+}
+
+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;
+ /* 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);
+
+/*
+ * If osd_finalize_request() was called but the request was not executed through
+ * the block layer, then we must release BIOs.
+ */
+static void _abort_unexecuted_bios(struct request *rq)
+{
+ struct bio *bio;
+
+ while ((bio = rq->bio) != NULL) {
+ rq->bio = bio->bi_next;
+ bio_endio(bio, 0);
+ }
+}
+
+void osd_end_request(struct osd_request *or)
+{
+ struct request *rq = or->request;
+
+ if (rq) {
+ if (rq->next_rq) {
+ _abort_unexecuted_bios(rq->next_rq);
+ blk_put_request(rq->next_rq);
+ }
+
+ _abort_unexecuted_bios(rq);
+ blk_put_request(rq);
+ }
+ _osd_request_free(or);
+}
+EXPORT_SYMBOL(osd_end_request);
+
+int osd_execute_request(struct osd_request *or)
+{
+ return blk_execute_rq(or->request->q, NULL, or->request, 0);
+}
+EXPORT_SYMBOL(osd_execute_request);
+
+static void osd_request_async_done(struct request *req, int error)
+{
+ struct osd_request *or = req->end_io_data;
+
+ or->async_error = error;
+
+ if (error)
+ OSD_DEBUG("osd_request_async_done error recieved %d\n", error);
+
+ 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);
+
+/*
+ * 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 _osd_req_encode_common(struct osd_request *or,
+ __be16 act, const struct osd_obj_id *obj, u64 offset, u64 len)
+{
+ _osdv1_req_encode_common(or, act, obj, offset, len);
+}
+
+/*
+ * Device commands
+ */
+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);
+
+/*
+ * 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);
+
+/*
+ * 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);
+
+void osd_req_write(struct osd_request *or,
+ const struct osd_obj_id *obj, struct bio *bio, u64 offset)
+{
+ _osd_req_encode_common(or, OSD_ACT_WRITE, obj, offset, bio->bi_size);
+ WARN_ON(or->out.bio || or->out.total_bytes);
+ bio->bi_rw |= (1 << BIO_RW);
+ or->out.bio = bio;
+ or->out.total_bytes = bio->bi_size;
+}
+EXPORT_SYMBOL(osd_req_write);
+
+void osd_req_read(struct osd_request *or,
+ const struct osd_obj_id *obj, struct bio *bio, u64 offset)
+{
+ _osd_req_encode_common(or, OSD_ACT_READ, obj, offset, bio->bi_size);
+ WARN_ON(or->in.bio || or->in.total_bytes);
+ bio->bi_rw &= ~(1 << BIO_RW);
+ or->in.bio = bio;
+ or->in.total_bytes = bio->bi_size;
+}
+EXPORT_SYMBOL(osd_req_read);
+
+/*
+ * osd_finalize_request and helpers
+ */
+
+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 = -ENOMEM;
+
+ req = blk_get_request(q, has_out, flags);
+ if (!req)
+ goto out;
+
+ or->request = req;
+ req->cmd_type = REQ_TYPE_BLOCK_PC;
+ 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 = blk_get_request(q, READ, flags);
+ if (!req) {
+ OSD_DEBUG("blk_get_request for bidi failed\n");
+ goto out;
+ }
+ req->cmd_type = REQ_TYPE_BLOCK_PC;
+ 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;
+ 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->set_attr.total_bytes ||
+ or->enc_get_attr.total_bytes;
+
+ ret = _init_blk_request(or, has_in, has_out);
+ if (ret) {
+ OSD_DEBUG("_init_blk_request failed\n");
+ return ret;
+ }
+
+ if (or->out.bio) {
+ ret = blk_rq_append_bio(or->request->q, or->out.req,
+ or->out.bio);
+ if (ret) {
+ OSD_DEBUG("blk_rq_append_bio out failed\n");
+ return ret;
+ }
+ OSD_DEBUG("out bytes=%llu (bytes_req=%u)\n",
+ _LLU(or->out.total_bytes), or->out.req->data_len);
+ }
+ if (or->in.bio) {
+ ret = blk_rq_append_bio(or->request->q, or->in.req, or->in.bio);
+ if (ret) {
+ OSD_DEBUG("blk_rq_append_bio in failed\n");
+ return ret;
+ }
+ OSD_DEBUG("in bytes=%llu (bytes_req=%u)\n",
+ _LLU(or->in.total_bytes), or->in.req->data_len);
+ }
+
+ if (!or->attributes_mode)
+ or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
+ cdbh->command_specific_options |= or->attributes_mode;
+
+ or->request->cmd = or->cdb.buff;
+ or->request->cmd_len = _osd_req_cdb_len(or);
+
+ return 0;
+}
+EXPORT_SYMBOL(osd_finalize_request);
+
+/*
+ * 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
+};
+
+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);
+
+void osd_set_caps(struct osd_cdb *cdb, const void *caps)
+{
+ memcpy(&cdb->v1.caps, caps, OSDv1_CAP_LEN);
+}
projects / linux-2.6-omap-h63xx.git / commitdiff