/* * 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 * Benny Halevy * * 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 #include #include #include #include #include #include #include "osd_debug.h" #ifndef __unused # define __unused __attribute__((unused)) #endif enum { OSD_REQ_RETRIES = 1 }; MODULE_AUTHOR("Boaz Harrosh "); 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_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, sizeof(*attr_list)); attr_list->type = list_type; } else { struct osdv2_attributes_list_header *attr_list = list; memset(attr_list, 0, sizeof(*attr_list)); attr_list->type = list_type; } } static bool _osd_req_is_alist_type(struct osd_request *or, void *list, int list_type) { if (!list) return false; if (osd_req_is_ver1(or)) { struct osdv1_attributes_list_header *attr_list = list; return attr_list->type == list_type; } else { struct osdv2_attributes_list_header *attr_list = list; return attr_list->type == list_type; } } /* This is for List-objects not Attributes-Lists */ static void _osd_req_encode_olist(struct osd_request *or, struct osd_obj_id_list *list) { struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb); if (osd_req_is_ver1(or)) { cdbh->v1.list_identifier = list->list_identifier; cdbh->v1.start_address = list->continuation_id; } else { cdbh->v2.list_identifier = list->list_identifier; cdbh->v2.start_address = list->continuation_id; } } static osd_cdb_offset osd_req_encode_offset(struct osd_request *or, u64 offset, unsigned *padding) { return __osd_encode_offset(offset, padding, osd_req_is_ver1(or) ? OSDv1_OFFSET_MIN_SHIFT : OSD_OFFSET_MIN_SHIFT, OSD_OFFSET_MAX_SHIFT); } static struct osd_security_parameters * _osd_req_sec_params(struct osd_request *or) { struct osd_cdb *ocdb = &or->cdb; if (osd_req_is_ver1(or)) return (struct osd_security_parameters *)&ocdb->v1.sec_params; else return (struct osd_security_parameters *)&ocdb->v2.sec_params; } 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; #ifdef OSD_VER1_SUPPORT osdd->version = OSD_VER2; #endif /* 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); static void _osd_free_seg(struct osd_request *or __unused, struct _osd_req_data_segment *seg) { if (!seg->buff || !seg->alloc_size) return; kfree(seg->buff); seg->buff = NULL; seg->alloc_size = 0; } static void _put_request(struct request *rq) { /* * If osd_finalize_request() was called but the request was not * executed through the block layer, then we must release BIOs. * TODO: Keep error code in or->async_error. Need to audit all * code paths. */ if (unlikely(rq->bio)) blk_end_request(rq, -ENOMEM, blk_rq_bytes(rq)); else blk_put_request(rq); } void osd_end_request(struct osd_request *or) { struct request *rq = or->request; if (rq) { if (rq->next_rq) { _put_request(rq->next_rq); rq->next_rq = NULL; } _put_request(rq); } _osd_free_seg(or, &or->get_attr); _osd_free_seg(or, &or->enc_get_attr); _osd_free_seg(or, &or->set_attr); _osd_free_seg(or, &or->cdb_cont); _osd_request_free(or); } EXPORT_SYMBOL(osd_end_request); static void _set_error_resid(struct osd_request *or, struct request *req, int error) { or->async_error = error; or->req_errors = req->errors ? : error; or->sense_len = req->sense_len; if (or->out.req) or->out.residual = or->out.req->resid_len; if (or->in.req) or->in.residual = or->in.req->resid_len; } int osd_execute_request(struct osd_request *or) { int error = blk_execute_rq(or->request->q, NULL, or->request, 0); _set_error_resid(or, or->request, error); return error; } EXPORT_SYMBOL(osd_execute_request); static void osd_request_async_done(struct request *req, int error) { struct osd_request *or = req->end_io_data; _set_error_resid(or, req, error); if (req->next_rq) { __blk_put_request(req->q, req->next_rq); req->next_rq = NULL; } __blk_put_request(req->q, req); or->request = NULL; or->in.req = NULL; or->out.req = NULL; 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); u8 sg_out_pad_buffer[1 << OSDv1_OFFSET_MIN_SHIFT]; u8 sg_in_pad_buffer[1 << OSDv1_OFFSET_MIN_SHIFT]; static int _osd_realloc_seg(struct osd_request *or, struct _osd_req_data_segment *seg, unsigned max_bytes) { void *buff; if (seg->alloc_size >= max_bytes) return 0; buff = krealloc(seg->buff, max_bytes, or->alloc_flags); if (!buff) { OSD_ERR("Failed to Realloc %d-bytes was-%d\n", max_bytes, seg->alloc_size); return -ENOMEM; } memset(buff + seg->alloc_size, 0, max_bytes - seg->alloc_size); seg->buff = buff; seg->alloc_size = max_bytes; return 0; } static int _alloc_cdb_cont(struct osd_request *or, unsigned total_bytes) { OSD_DEBUG("total_bytes=%d\n", total_bytes); return _osd_realloc_seg(or, &or->cdb_cont, total_bytes); } static int _alloc_set_attr_list(struct osd_request *or, const struct osd_attr *oa, unsigned nelem, unsigned add_bytes) { unsigned total_bytes = add_bytes; for (; nelem; --nelem, ++oa) total_bytes += _osd_req_alist_elem_size(or, oa->len); OSD_DEBUG("total_bytes=%d\n", total_bytes); return _osd_realloc_seg(or, &or->set_attr, total_bytes); } static int _alloc_get_attr_desc(struct osd_request *or, unsigned max_bytes) { OSD_DEBUG("total_bytes=%d\n", max_bytes); return _osd_realloc_seg(or, &or->enc_get_attr, max_bytes); } static int _alloc_get_attr_list(struct osd_request *or) { OSD_DEBUG("total_bytes=%d\n", or->get_attr.total_bytes); return _osd_realloc_seg(or, &or->get_attr, or->get_attr.total_bytes); } /* * 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 _osdv2_req_encode_common(struct osd_request *or, __be16 act, const struct osd_obj_id *obj, u64 offset, u64 len) { struct osdv2_cdb *ocdb = &or->cdb.v2; OSD_DEBUG("OSDv2 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.v2.length = cpu_to_be64(len); ocdb->h.v2.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) { if (osd_req_is_ver1(or)) _osdv1_req_encode_common(or, act, obj, offset, len); else _osdv2_req_encode_common(or, act, obj, offset, len); } /* * Device commands */ /*TODO: void osd_req_set_master_seed_xchg(struct osd_request *, ...); */ /*TODO: void osd_req_set_master_key(struct osd_request *, ...); */ 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); int osd_req_list_dev_partitions(struct osd_request *or, osd_id initial_id, struct osd_obj_id_list *list, unsigned nelem) { return osd_req_list_partition_objects(or, 0, initial_id, list, nelem); } EXPORT_SYMBOL(osd_req_list_dev_partitions); static void _osd_req_encode_flush(struct osd_request *or, enum osd_options_flush_scope_values op) { struct osd_cdb_head *ocdb = osd_cdb_head(&or->cdb); ocdb->command_specific_options = op; } void osd_req_flush_obsd(struct osd_request *or, enum osd_options_flush_scope_values op) { _osd_req_encode_common(or, OSD_ACT_FLUSH_OSD, &osd_root_object, 0, 0); _osd_req_encode_flush(or, op); } EXPORT_SYMBOL(osd_req_flush_obsd); /*TODO: void osd_req_perform_scsi_command(struct osd_request *, const u8 *cdb, ...); */ /*TODO: void osd_req_task_management(struct osd_request *, ...); */ /* * 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); /*TODO: void osd_req_set_partition_key(struct osd_request *, osd_id partition, u8 new_key_id[OSD_CRYPTO_KEYID_SIZE], u8 seed[OSD_CRYPTO_SEED_SIZE]); */ static int _osd_req_list_objects(struct osd_request *or, __be16 action, const struct osd_obj_id *obj, osd_id initial_id, struct osd_obj_id_list *list, unsigned nelem) { struct request_queue *q = osd_request_queue(or->osd_dev); u64 len = nelem * sizeof(osd_id) + sizeof(*list); struct bio *bio; _osd_req_encode_common(or, action, obj, (u64)initial_id, len); if (list->list_identifier) _osd_req_encode_olist(or, list); WARN_ON(or->in.bio); bio = bio_map_kern(q, list, len, or->alloc_flags); if (IS_ERR(bio)) { OSD_ERR("!!! Failed to allocate list_objects BIO\n"); return PTR_ERR(bio); } bio->bi_rw &= ~REQ_WRITE; or->in.bio = bio; or->in.total_bytes = bio->bi_size; return 0; } int osd_req_list_partition_collections(struct osd_request *or, osd_id partition, osd_id initial_id, struct osd_obj_id_list *list, unsigned nelem) { struct osd_obj_id par = { .partition = partition, .id = 0, }; return osd_req_list_collection_objects(or, &par, initial_id, list, nelem); } EXPORT_SYMBOL(osd_req_list_partition_collections); int osd_req_list_partition_objects(struct osd_request *or, osd_id partition, osd_id initial_id, struct osd_obj_id_list *list, unsigned nelem) { struct osd_obj_id par = { .partition = partition, .id = 0, }; return _osd_req_list_objects(or, OSD_ACT_LIST, &par, initial_id, list, nelem); } EXPORT_SYMBOL(osd_req_list_partition_objects); void osd_req_flush_partition(struct osd_request *or, osd_id partition, enum osd_options_flush_scope_values op) { _osd_req_encode_partition(or, OSD_ACT_FLUSH_PARTITION, partition); _osd_req_encode_flush(or, op); } EXPORT_SYMBOL(osd_req_flush_partition); /* * Collection commands */ /*TODO: void osd_req_create_collection(struct osd_request *, const struct osd_obj_id *); */ /*TODO: void osd_req_remove_collection(struct osd_request *, const struct osd_obj_id *); */ int osd_req_list_collection_objects(struct osd_request *or, const struct osd_obj_id *obj, osd_id initial_id, struct osd_obj_id_list *list, unsigned nelem) { return _osd_req_list_objects(or, OSD_ACT_LIST_COLLECTION, obj, initial_id, list, nelem); } EXPORT_SYMBOL(osd_req_list_collection_objects); /*TODO: void query(struct osd_request *, ...); V2 */ void osd_req_flush_collection(struct osd_request *or, const struct osd_obj_id *obj, enum osd_options_flush_scope_values op) { _osd_req_encode_common(or, OSD_ACT_FLUSH_PARTITION, obj, 0, 0); _osd_req_encode_flush(or, op); } EXPORT_SYMBOL(osd_req_flush_collection); /*TODO: void get_member_attrs(struct osd_request *, ...); V2 */ /*TODO: void set_member_attrs(struct osd_request *, ...); V2 */ /* * 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); /*TODO: void osd_req_create_multi(struct osd_request *or, struct osd_obj_id *first, struct osd_obj_id_list *list, unsigned nelem); */ void osd_req_write(struct osd_request *or, const struct osd_obj_id *obj, u64 offset, struct bio *bio, u64 len) { _osd_req_encode_common(or, OSD_ACT_WRITE, obj, offset, len); WARN_ON(or->out.bio || or->out.total_bytes); WARN_ON(0 == (bio->bi_rw & REQ_WRITE)); or->out.bio = bio; or->out.total_bytes = len; } EXPORT_SYMBOL(osd_req_write); 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 = osd_request_queue(or->osd_dev); struct bio *bio = bio_map_kern(req_q, buff, len, GFP_KERNEL); if (IS_ERR(bio)) return PTR_ERR(bio); bio->bi_rw |= REQ_WRITE; /* FIXME: bio_set_dir() */ osd_req_write(or, obj, offset, bio, len); return 0; } EXPORT_SYMBOL(osd_req_write_kern); /*TODO: void osd_req_append(struct osd_request *, const struct osd_obj_id *, struct bio *data_out); */ /*TODO: void osd_req_create_write(struct osd_request *, const struct osd_obj_id *, struct bio *data_out, u64 offset); */ /*TODO: void osd_req_clear(struct osd_request *, const struct osd_obj_id *, u64 offset, u64 len); */ /*TODO: void osd_req_punch(struct osd_request *, const struct osd_obj_id *, u64 offset, u64 len); V2 */ void osd_req_flush_object(struct osd_request *or, const struct osd_obj_id *obj, enum osd_options_flush_scope_values op, /*V2*/ u64 offset, /*V2*/ u64 len) { if (unlikely(osd_req_is_ver1(or) && (offset || len))) { OSD_DEBUG("OSD Ver1 flush on specific range ignored\n"); offset = 0; len = 0; } _osd_req_encode_common(or, OSD_ACT_FLUSH, obj, offset, len); _osd_req_encode_flush(or, op); } EXPORT_SYMBOL(osd_req_flush_object); void osd_req_read(struct osd_request *or, const struct osd_obj_id *obj, u64 offset, struct bio *bio, u64 len) { _osd_req_encode_common(or, OSD_ACT_READ, obj, offset, len); WARN_ON(or->in.bio || or->in.total_bytes); WARN_ON(bio->bi_rw & REQ_WRITE); or->in.bio = bio; or->in.total_bytes = len; } EXPORT_SYMBOL(osd_req_read); 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 = osd_request_queue(or->osd_dev); struct bio *bio = bio_map_kern(req_q, buff, len, GFP_KERNEL); if (IS_ERR(bio)) return PTR_ERR(bio); osd_req_read(or, obj, offset, bio, len); return 0; } EXPORT_SYMBOL(osd_req_read_kern); static int _add_sg_continuation_descriptor(struct osd_request *or, const struct osd_sg_entry *sglist, unsigned numentries, u64 *len) { struct osd_sg_continuation_descriptor *oscd; u32 oscd_size; unsigned i; int ret; oscd_size = sizeof(*oscd) + numentries * sizeof(oscd->entries[0]); if (!or->cdb_cont.total_bytes) { /* First time, jump over the header, we will write to: * cdb_cont.buff + cdb_cont.total_bytes */ or->cdb_cont.total_bytes = sizeof(struct osd_continuation_segment_header); } ret = _alloc_cdb_cont(or, or->cdb_cont.total_bytes + oscd_size); if (unlikely(ret)) return ret; oscd = or->cdb_cont.buff + or->cdb_cont.total_bytes; oscd->hdr.type = cpu_to_be16(SCATTER_GATHER_LIST); oscd->hdr.pad_length = 0; oscd->hdr.length = cpu_to_be32(oscd_size - sizeof(*oscd)); *len = 0; /* copy the sg entries and convert to network byte order */ for (i = 0; i < numentries; i++) { oscd->entries[i].offset = cpu_to_be64(sglist[i].offset); oscd->entries[i].len = cpu_to_be64(sglist[i].len); *len += sglist[i].len; } or->cdb_cont.total_bytes += oscd_size; OSD_DEBUG("total_bytes=%d oscd_size=%d numentries=%d\n", or->cdb_cont.total_bytes, oscd_size, numentries); return 0; } static int _osd_req_finalize_cdb_cont(struct osd_request *or, const u8 *cap_key) { struct request_queue *req_q = osd_request_queue(or->osd_dev); struct bio *bio; struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb); struct osd_continuation_segment_header *cont_seg_hdr; if (!or->cdb_cont.total_bytes) return 0; cont_seg_hdr = or->cdb_cont.buff; cont_seg_hdr->format = CDB_CONTINUATION_FORMAT_V2; cont_seg_hdr->service_action = cdbh->varlen_cdb.service_action; /* create a bio for continuation segment */ bio = bio_map_kern(req_q, or->cdb_cont.buff, or->cdb_cont.total_bytes, GFP_KERNEL); if (IS_ERR(bio)) return PTR_ERR(bio); bio->bi_rw |= REQ_WRITE; /* integrity check the continuation before the bio is linked * with the other data segments since the continuation * integrity is separate from the other data segments. */ osd_sec_sign_data(cont_seg_hdr->integrity_check, bio, cap_key); cdbh->v2.cdb_continuation_length = cpu_to_be32(or->cdb_cont.total_bytes); /* we can't use _req_append_segment, because we need to link in the * continuation bio to the head of the bio list - the * continuation segment (if it exists) is always the first segment in * the out data buffer. */ bio->bi_next = or->out.bio; or->out.bio = bio; or->out.total_bytes += or->cdb_cont.total_bytes; return 0; } /* osd_req_write_sg: Takes a @bio that points to the data out buffer and an * @sglist that has the scatter gather entries. Scatter-gather enables a write * of multiple none-contiguous areas of an object, in a single call. The extents * may overlap and/or be in any order. The only constrain is that: * total_bytes(sglist) >= total_bytes(bio) */ int osd_req_write_sg(struct osd_request *or, const struct osd_obj_id *obj, struct bio *bio, const struct osd_sg_entry *sglist, unsigned numentries) { u64 len; int ret = _add_sg_continuation_descriptor(or, sglist, numentries, &len); if (ret) return ret; osd_req_write(or, obj, 0, bio, len); return 0; } EXPORT_SYMBOL(osd_req_write_sg); /* osd_req_read_sg: Read multiple extents of an object into @bio * See osd_req_write_sg */ int osd_req_read_sg(struct osd_request *or, const struct osd_obj_id *obj, struct bio *bio, const struct osd_sg_entry *sglist, unsigned numentries) { u64 len; u64 off; int ret; if (numentries > 1) { off = 0; ret = _add_sg_continuation_descriptor(or, sglist, numentries, &len); if (ret) return ret; } else { /* Optimize the case of single segment, read_sg is a * bidi operation. */ len = sglist->len; off = sglist->offset; } osd_req_read(or, obj, off, bio, len); return 0; } EXPORT_SYMBOL(osd_req_read_sg); /* SG-list write/read Kern API * * osd_req_{write,read}_sg_kern takes an array of @buff pointers and an array * of sg_entries. @numentries indicates how many pointers and sg_entries there * are. By requiring an array of buff pointers. This allows a caller to do a * single write/read and scatter into multiple buffers. * NOTE: Each buffer + len should not cross a page boundary. */ static struct bio *_create_sg_bios(struct osd_request *or, void **buff, const struct osd_sg_entry *sglist, unsigned numentries) { struct request_queue *q = osd_request_queue(or->osd_dev); struct bio *bio; unsigned i; bio = bio_kmalloc(GFP_KERNEL, numentries); if (unlikely(!bio)) { OSD_DEBUG("Faild to allocate BIO size=%u\n", numentries); return ERR_PTR(-ENOMEM); } for (i = 0; i < numentries; i++) { unsigned offset = offset_in_page(buff[i]); struct page *page = virt_to_page(buff[i]); unsigned len = sglist[i].len; unsigned added_len; BUG_ON(offset + len > PAGE_SIZE); added_len = bio_add_pc_page(q, bio, page, len, offset); if (unlikely(len != added_len)) { OSD_DEBUG("bio_add_pc_page len(%d) != added_len(%d)\n", len, added_len); bio_put(bio); return ERR_PTR(-ENOMEM); } } return bio; } int osd_req_write_sg_kern(struct osd_request *or, const struct osd_obj_id *obj, void **buff, const struct osd_sg_entry *sglist, unsigned numentries) { struct bio *bio = _create_sg_bios(or, buff, sglist, numentries); if (IS_ERR(bio)) return PTR_ERR(bio); bio->bi_rw |= REQ_WRITE; osd_req_write_sg(or, obj, bio, sglist, numentries); return 0; } EXPORT_SYMBOL(osd_req_write_sg_kern); int osd_req_read_sg_kern(struct osd_request *or, const struct osd_obj_id *obj, void **buff, const struct osd_sg_entry *sglist, unsigned numentries) { struct bio *bio = _create_sg_bios(or, buff, sglist, numentries); if (IS_ERR(bio)) return PTR_ERR(bio); osd_req_read_sg(or, obj, bio, sglist, numentries); return 0; } EXPORT_SYMBOL(osd_req_read_sg_kern); void osd_req_get_attributes(struct osd_request *or, const struct osd_obj_id *obj) { _osd_req_encode_common(or, OSD_ACT_GET_ATTRIBUTES, obj, 0, 0); } EXPORT_SYMBOL(osd_req_get_attributes); void osd_req_set_attributes(struct osd_request *or, const struct osd_obj_id *obj) { _osd_req_encode_common(or, OSD_ACT_SET_ATTRIBUTES, obj, 0, 0); } EXPORT_SYMBOL(osd_req_set_attributes); /* * Attributes List-mode */ int osd_req_add_set_attr_list(struct osd_request *or, const struct osd_attr *oa, unsigned nelem) { unsigned total_bytes = or->set_attr.total_bytes; void *attr_last; int ret; if (or->attributes_mode && or->attributes_mode != OSD_CDB_GET_SET_ATTR_LISTS) { WARN_ON(1); return -EINVAL; } or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS; if (!total_bytes) { /* first-time: allocate and put list header */ total_bytes = _osd_req_sizeof_alist_header(or); ret = _alloc_set_attr_list(or, oa, nelem, total_bytes); if (ret) return ret; _osd_req_set_alist_type(or, or->set_attr.buff, OSD_ATTR_LIST_SET_RETRIEVE); } attr_last = or->set_attr.buff + total_bytes; for (; nelem; --nelem) { unsigned elem_size = _osd_req_alist_elem_size(or, oa->len); total_bytes += elem_size; if (unlikely(or->set_attr.alloc_size < total_bytes)) { or->set_attr.total_bytes = total_bytes - elem_size; ret = _alloc_set_attr_list(or, oa, nelem, total_bytes); if (ret) return ret; attr_last = or->set_attr.buff + or->set_attr.total_bytes; } _osd_req_alist_elem_encode(or, attr_last, oa); attr_last += elem_size; ++oa; } or->set_attr.total_bytes = total_bytes; return 0; } EXPORT_SYMBOL(osd_req_add_set_attr_list); static int _req_append_segment(struct osd_request *or, unsigned padding, struct _osd_req_data_segment *seg, struct _osd_req_data_segment *last_seg, struct _osd_io_info *io) { void *pad_buff; int ret; if (padding) { /* check if we can just add it to last buffer */ if (last_seg && (padding <= last_seg->alloc_size - last_seg->total_bytes)) pad_buff = last_seg->buff + last_seg->total_bytes; else pad_buff = io->pad_buff; ret = blk_rq_map_kern(io->req->q, io->req, pad_buff, padding, or->alloc_flags); if (ret) return ret; io->total_bytes += padding; } ret = blk_rq_map_kern(io->req->q, io->req, seg->buff, seg->total_bytes, or->alloc_flags); if (ret) return ret; io->total_bytes += seg->total_bytes; OSD_DEBUG("padding=%d buff=%p total_bytes=%d\n", padding, seg->buff, seg->total_bytes); return 0; } static int _osd_req_finalize_set_attr_list(struct osd_request *or) { struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb); unsigned padding; int ret; if (!or->set_attr.total_bytes) { cdbh->attrs_list.set_attr_offset = OSD_OFFSET_UNUSED; return 0; } cdbh->attrs_list.set_attr_bytes = cpu_to_be32(or->set_attr.total_bytes); cdbh->attrs_list.set_attr_offset = osd_req_encode_offset(or, or->out.total_bytes, &padding); ret = _req_append_segment(or, padding, &or->set_attr, or->out.last_seg, &or->out); if (ret) return ret; or->out.last_seg = &or->set_attr; return 0; } int osd_req_add_get_attr_list(struct osd_request *or, const struct osd_attr *oa, unsigned nelem) { unsigned total_bytes = or->enc_get_attr.total_bytes; void *attr_last; int ret; if (or->attributes_mode && or->attributes_mode != OSD_CDB_GET_SET_ATTR_LISTS) { WARN_ON(1); return -EINVAL; } or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS; /* first time calc data-in list header size */ if (!or->get_attr.total_bytes) or->get_attr.total_bytes = _osd_req_sizeof_alist_header(or); /* calc data-out info */ if (!total_bytes) { /* first-time: allocate and put list header */ unsigned max_bytes; total_bytes = _osd_req_sizeof_alist_header(or); max_bytes = total_bytes + nelem * sizeof(struct osd_attributes_list_attrid); ret = _alloc_get_attr_desc(or, max_bytes); if (ret) return ret; _osd_req_set_alist_type(or, or->enc_get_attr.buff, OSD_ATTR_LIST_GET); } attr_last = or->enc_get_attr.buff + total_bytes; for (; nelem; --nelem) { struct osd_attributes_list_attrid *attrid; const unsigned cur_size = sizeof(*attrid); total_bytes += cur_size; if (unlikely(or->enc_get_attr.alloc_size < total_bytes)) { or->enc_get_attr.total_bytes = total_bytes - cur_size; ret = _alloc_get_attr_desc(or, total_bytes + nelem * sizeof(*attrid)); if (ret) return ret; attr_last = or->enc_get_attr.buff + or->enc_get_attr.total_bytes; } attrid = attr_last; attrid->attr_page = cpu_to_be32(oa->attr_page); attrid->attr_id = cpu_to_be32(oa->attr_id); attr_last += cur_size; /* calc data-in size */ or->get_attr.total_bytes += _osd_req_alist_elem_size(or, oa->len); ++oa; } or->enc_get_attr.total_bytes = total_bytes; OSD_DEBUG( "get_attr.total_bytes=%u(%u) enc_get_attr.total_bytes=%u(%Zu)\n", or->get_attr.total_bytes, or->get_attr.total_bytes - _osd_req_sizeof_alist_header(or), or->enc_get_attr.total_bytes, (or->enc_get_attr.total_bytes - _osd_req_sizeof_alist_header(or)) / sizeof(struct osd_attributes_list_attrid)); return 0; } EXPORT_SYMBOL(osd_req_add_get_attr_list); static int _osd_req_finalize_get_attr_list(struct osd_request *or) { struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb); unsigned out_padding; unsigned in_padding; int ret; if (!or->enc_get_attr.total_bytes) { cdbh->attrs_list.get_attr_desc_offset = OSD_OFFSET_UNUSED; cdbh->attrs_list.get_attr_offset = OSD_OFFSET_UNUSED; return 0; } ret = _alloc_get_attr_list(or); if (ret) return ret; /* The out-going buffer info update */ OSD_DEBUG("out-going\n"); cdbh->attrs_list.get_attr_desc_bytes = cpu_to_be32(or->enc_get_attr.total_bytes); cdbh->attrs_list.get_attr_desc_offset = osd_req_encode_offset(or, or->out.total_bytes, &out_padding); ret = _req_append_segment(or, out_padding, &or->enc_get_attr, or->out.last_seg, &or->out); if (ret) return ret; or->out.last_seg = &or->enc_get_attr; /* The incoming buffer info update */ OSD_DEBUG("in-coming\n"); cdbh->attrs_list.get_attr_alloc_length = cpu_to_be32(or->get_attr.total_bytes); cdbh->attrs_list.get_attr_offset = osd_req_encode_offset(or, or->in.total_bytes, &in_padding); ret = _req_append_segment(or, in_padding, &or->get_attr, NULL, &or->in); if (ret) return ret; or->in.last_seg = &or->get_attr; return 0; } int osd_req_decode_get_attr_list(struct osd_request *or, struct osd_attr *oa, int *nelem, void **iterator) { unsigned cur_bytes, returned_bytes; int n; const unsigned sizeof_attr_list = _osd_req_sizeof_alist_header(or); void *cur_p; if (!_osd_req_is_alist_type(or, or->get_attr.buff, OSD_ATTR_LIST_SET_RETRIEVE)) { oa->attr_page = 0; oa->attr_id = 0; oa->val_ptr = NULL; oa->len = 0; *iterator = NULL; return 0; } if (*iterator) { BUG_ON((*iterator < or->get_attr.buff) || (or->get_attr.buff + or->get_attr.alloc_size < *iterator)); cur_p = *iterator; cur_bytes = (*iterator - or->get_attr.buff) - sizeof_attr_list; returned_bytes = or->get_attr.total_bytes; } else { /* first time decode the list header */ cur_bytes = sizeof_attr_list; returned_bytes = _osd_req_alist_size(or, or->get_attr.buff) + sizeof_attr_list; cur_p = or->get_attr.buff + sizeof_attr_list; if (returned_bytes > or->get_attr.alloc_size) { OSD_DEBUG("target report: space was not big enough! " "Allocate=%u Needed=%u\n", or->get_attr.alloc_size, returned_bytes + sizeof_attr_list); returned_bytes = or->get_attr.alloc_size - sizeof_attr_list; } or->get_attr.total_bytes = returned_bytes; } for (n = 0; (n < *nelem) && (cur_bytes < returned_bytes); ++n) { int inc = _osd_req_alist_elem_decode(or, cur_p, oa, returned_bytes - cur_bytes); if (inc < 0) { OSD_ERR("BAD FOOD from target. list not valid!" "c=%d r=%d n=%d\n", cur_bytes, returned_bytes, n); oa->val_ptr = NULL; cur_bytes = returned_bytes; /* break the caller loop */ break; } cur_bytes += inc; cur_p += inc; ++oa; } *iterator = (returned_bytes - cur_bytes) ? cur_p : NULL; *nelem = n; return returned_bytes - cur_bytes; } EXPORT_SYMBOL(osd_req_decode_get_attr_list); /* * Attributes Page-mode */ int osd_req_add_get_attr_page(struct osd_request *or, u32 page_id, void *attar_page, unsigned max_page_len, const struct osd_attr *set_one_attr) { struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb); if (or->attributes_mode && or->attributes_mode != OSD_CDB_GET_ATTR_PAGE_SET_ONE) { WARN_ON(1); return -EINVAL; } or->attributes_mode = OSD_CDB_GET_ATTR_PAGE_SET_ONE; or->get_attr.buff = attar_page; or->get_attr.total_bytes = max_page_len; cdbh->attrs_page.get_attr_page = cpu_to_be32(page_id); cdbh->attrs_page.get_attr_alloc_length = cpu_to_be32(max_page_len); if (!set_one_attr || !set_one_attr->attr_page) return 0; /* The set is optional */ or->set_attr.buff = set_one_attr->val_ptr; or->set_attr.total_bytes = set_one_attr->len; cdbh->attrs_page.set_attr_page = cpu_to_be32(set_one_attr->attr_page); cdbh->attrs_page.set_attr_id = cpu_to_be32(set_one_attr->attr_id); cdbh->attrs_page.set_attr_length = cpu_to_be32(set_one_attr->len); return 0; } EXPORT_SYMBOL(osd_req_add_get_attr_page); static int _osd_req_finalize_attr_page(struct osd_request *or) { struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb); unsigned in_padding, out_padding; int ret; /* returned page */ cdbh->attrs_page.get_attr_offset = osd_req_encode_offset(or, or->in.total_bytes, &in_padding); ret = _req_append_segment(or, in_padding, &or->get_attr, NULL, &or->in); if (ret) return ret; if (or->set_attr.total_bytes == 0) return 0; /* set one value */ cdbh->attrs_page.set_attr_offset = osd_req_encode_offset(or, or->out.total_bytes, &out_padding); ret = _req_append_segment(or, out_padding, &or->set_attr, NULL, &or->out); return ret; } static inline void osd_sec_parms_set_out_offset(bool is_v1, struct osd_security_parameters *sec_parms, osd_cdb_offset offset) { if (is_v1) sec_parms->v1.data_out_integrity_check_offset = offset; else sec_parms->v2.data_out_integrity_check_offset = offset; } static inline void osd_sec_parms_set_in_offset(bool is_v1, struct osd_security_parameters *sec_parms, osd_cdb_offset offset) { if (is_v1) sec_parms->v1.data_in_integrity_check_offset = offset; else sec_parms->v2.data_in_integrity_check_offset = offset; } static int _osd_req_finalize_data_integrity(struct osd_request *or, bool has_in, bool has_out, struct bio *out_data_bio, u64 out_data_bytes, const u8 *cap_key) { struct osd_security_parameters *sec_parms = _osd_req_sec_params(or); int ret; if (!osd_is_sec_alldata(sec_parms)) return 0; if (has_out) { struct _osd_req_data_segment seg = { .buff = &or->out_data_integ, .total_bytes = sizeof(or->out_data_integ), }; unsigned pad; or->out_data_integ.data_bytes = cpu_to_be64(out_data_bytes); or->out_data_integ.set_attributes_bytes = cpu_to_be64( or->set_attr.total_bytes); or->out_data_integ.get_attributes_bytes = cpu_to_be64( or->enc_get_attr.total_bytes); osd_sec_parms_set_out_offset(osd_req_is_ver1(or), sec_parms, osd_req_encode_offset(or, or->out.total_bytes, &pad)); ret = _req_append_segment(or, pad, &seg, or->out.last_seg, &or->out); if (ret) return ret; or->out.last_seg = NULL; /* they are now all chained to request sign them all together */ osd_sec_sign_data(&or->out_data_integ, out_data_bio, cap_key); } if (has_in) { struct _osd_req_data_segment seg = { .buff = &or->in_data_integ, .total_bytes = sizeof(or->in_data_integ), }; unsigned pad; osd_sec_parms_set_in_offset(osd_req_is_ver1(or), sec_parms, osd_req_encode_offset(or, or->in.total_bytes, &pad)); ret = _req_append_segment(or, pad, &seg, or->in.last_seg, &or->in); if (ret) return ret; or->in.last_seg = NULL; } return 0; } /* * osd_finalize_request and helpers */ static struct request *_make_request(struct request_queue *q, bool has_write, struct _osd_io_info *oii, gfp_t flags) { if (oii->bio) return blk_make_request(q, oii->bio, flags); else { struct request *req; req = blk_get_request(q, has_write ? WRITE : READ, flags); if (unlikely(!req)) return ERR_PTR(-ENOMEM); return req; } } 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; req = _make_request(q, has_out, has_out ? &or->out : &or->in, flags); if (IS_ERR(req)) { ret = PTR_ERR(req); goto out; } or->request = req; req->cmd_type = REQ_TYPE_BLOCK_PC; req->cmd_flags |= REQ_QUIET; 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 = _make_request(q, false, &or->in, flags); if (IS_ERR(req)) { OSD_DEBUG("blk_get_request for bidi failed\n"); ret = PTR_ERR(req); 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; /* Save for data_integrity without the cdb_continuation */ struct bio *out_data_bio = or->out.bio; u64 out_data_bytes = or->out.total_bytes; 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->cdb_cont.total_bytes || or->set_attr.total_bytes || or->enc_get_attr.total_bytes; ret = _osd_req_finalize_cdb_cont(or, cap_key); if (ret) { OSD_DEBUG("_osd_req_finalize_cdb_cont failed\n"); return ret; } ret = _init_blk_request(or, has_in, has_out); if (ret) { OSD_DEBUG("_init_blk_request failed\n"); return ret; } or->out.pad_buff = sg_out_pad_buffer; or->in.pad_buff = sg_in_pad_buffer; if (!or->attributes_mode) or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS; cdbh->command_specific_options |= or->attributes_mode; if (or->attributes_mode == OSD_CDB_GET_ATTR_PAGE_SET_ONE) { ret = _osd_req_finalize_attr_page(or); if (ret) { OSD_DEBUG("_osd_req_finalize_attr_page failed\n"); return ret; } } else { /* TODO: I think that for the GET_ATTR command these 2 should * be reversed to keep them in execution order (for embeded * targets with low memory footprint) */ ret = _osd_req_finalize_set_attr_list(or); if (ret) { OSD_DEBUG("_osd_req_finalize_set_attr_list failed\n"); return ret; } ret = _osd_req_finalize_get_attr_list(or); if (ret) { OSD_DEBUG("_osd_req_finalize_get_attr_list failed\n"); return ret; } } ret = _osd_req_finalize_data_integrity(or, has_in, has_out, out_data_bio, out_data_bytes, cap_key); if (ret) return ret; osd_sec_sign_cdb(&or->cdb, cap_key); or->request->cmd = or->cdb.buff; or->request->cmd_len = _osd_req_cdb_len(or); return 0; } EXPORT_SYMBOL(osd_finalize_request); static bool _is_osd_security_code(int code) { return (code == osd_security_audit_value_frozen) || (code == osd_security_working_key_frozen) || (code == osd_nonce_not_unique) || (code == osd_nonce_timestamp_out_of_range) || (code == osd_invalid_dataout_buffer_integrity_check_value); } #define OSD_SENSE_PRINT1(fmt, a...) \ do { \ if (__cur_sense_need_output) \ OSD_ERR(fmt, ##a); \ } while (0) #define OSD_SENSE_PRINT2(fmt, a...) OSD_SENSE_PRINT1(" " fmt, ##a) int osd_req_decode_sense_full(struct osd_request *or, struct osd_sense_info *osi, bool silent, struct osd_obj_id *bad_obj_list __unused, int max_obj __unused, struct osd_attr *bad_attr_list, int max_attr) { int sense_len, original_sense_len; struct osd_sense_info local_osi; struct scsi_sense_descriptor_based *ssdb; void *cur_descriptor; #if (CONFIG_SCSI_OSD_DPRINT_SENSE == 0) const bool __cur_sense_need_output = false; #else bool __cur_sense_need_output = !silent; #endif int ret; if (likely(!or->req_errors)) return 0; osi = osi ? : &local_osi; memset(osi, 0, sizeof(*osi)); ssdb = (typeof(ssdb))or->sense; sense_len = or->sense_len; if ((sense_len < (int)sizeof(*ssdb) || !ssdb->sense_key)) { OSD_ERR("Block-layer returned error(0x%x) but " "sense_len(%u) || key(%d) is empty\n", or->req_errors, sense_len, ssdb->sense_key); goto analyze; } if ((ssdb->response_code != 0x72) && (ssdb->response_code != 0x73)) { OSD_ERR("Unrecognized scsi sense: rcode=%x length=%d\n", ssdb->response_code, sense_len); goto analyze; } osi->key = ssdb->sense_key; osi->additional_code = be16_to_cpu(ssdb->additional_sense_code); original_sense_len = ssdb->additional_sense_length + 8; #if (CONFIG_SCSI_OSD_DPRINT_SENSE == 1) if (__cur_sense_need_output) __cur_sense_need_output = (osi->key > scsi_sk_recovered_error); #endif OSD_SENSE_PRINT1("Main Sense information key=0x%x length(%d, %d) " "additional_code=0x%x async_error=%d errors=0x%x\n", osi->key, original_sense_len, sense_len, osi->additional_code, or->async_error, or->req_errors); if (original_sense_len < sense_len) sense_len = original_sense_len; cur_descriptor = ssdb->ssd; sense_len -= sizeof(*ssdb); while (sense_len > 0) { struct scsi_sense_descriptor *ssd = cur_descriptor; int cur_len = ssd->additional_length + 2; sense_len -= cur_len; if (sense_len < 0) break; /* sense was truncated */ switch (ssd->descriptor_type) { case scsi_sense_information: case scsi_sense_command_specific_information: { struct scsi_sense_command_specific_data_descriptor *sscd = cur_descriptor; osi->command_info = get_unaligned_be64(&sscd->information) ; OSD_SENSE_PRINT2( "command_specific_information 0x%llx \n", _LLU(osi->command_info)); break; } case scsi_sense_key_specific: { struct scsi_sense_key_specific_data_descriptor *ssks = cur_descriptor; osi->sense_info = get_unaligned_be16(&ssks->value); OSD_SENSE_PRINT2( "sense_key_specific_information %u" "sksv_cd_bpv_bp (0x%x)\n", osi->sense_info, ssks->sksv_cd_bpv_bp); break; } case osd_sense_object_identification: { /*FIXME: Keep first not last, Store in array*/ struct osd_sense_identification_data_descriptor *osidd = cur_descriptor; osi->not_initiated_command_functions = le32_to_cpu(osidd->not_initiated_functions); osi->completed_command_functions = le32_to_cpu(osidd->completed_functions); osi->obj.partition = be64_to_cpu(osidd->partition_id); osi->obj.id = be64_to_cpu(osidd->object_id); OSD_SENSE_PRINT2( "object_identification pid=0x%llx oid=0x%llx\n", _LLU(osi->obj.partition), _LLU(osi->obj.id)); OSD_SENSE_PRINT2( "not_initiated_bits(%x) " "completed_command_bits(%x)\n", osi->not_initiated_command_functions, osi->completed_command_functions); break; } case osd_sense_response_integrity_check: { struct osd_sense_response_integrity_check_descriptor *osricd = cur_descriptor; const unsigned len = sizeof(osricd->integrity_check_value); char key_dump[len*4 + 2]; /* 2nibbles+space+ASCII */ hex_dump_to_buffer(osricd->integrity_check_value, len, 32, 1, key_dump, sizeof(key_dump), true); OSD_SENSE_PRINT2("response_integrity [%s]\n", key_dump); } case osd_sense_attribute_identification: { struct osd_sense_attributes_data_descriptor *osadd = cur_descriptor; unsigned len = min(cur_len, sense_len); struct osd_sense_attr *pattr = osadd->sense_attrs; while (len >= sizeof(*pattr)) { u32 attr_page = be32_to_cpu(pattr->attr_page); u32 attr_id = be32_to_cpu(pattr->attr_id); if (!osi->attr.attr_page) { osi->attr.attr_page = attr_page; osi->attr.attr_id = attr_id; } if (bad_attr_list && max_attr) { bad_attr_list->attr_page = attr_page; bad_attr_list->attr_id = attr_id; bad_attr_list++; max_attr--; } len -= sizeof(*pattr); OSD_SENSE_PRINT2( "osd_sense_attribute_identification" "attr_page=0x%x attr_id=0x%x\n", attr_page, attr_id); } } /*These are not legal for OSD*/ case scsi_sense_field_replaceable_unit: OSD_SENSE_PRINT2("scsi_sense_field_replaceable_unit\n"); break; case scsi_sense_stream_commands: OSD_SENSE_PRINT2("scsi_sense_stream_commands\n"); break; case scsi_sense_block_commands: OSD_SENSE_PRINT2("scsi_sense_block_commands\n"); break; case scsi_sense_ata_return: OSD_SENSE_PRINT2("scsi_sense_ata_return\n"); break; default: if (ssd->descriptor_type <= scsi_sense_Reserved_last) OSD_SENSE_PRINT2( "scsi_sense Reserved descriptor (0x%x)", ssd->descriptor_type); else OSD_SENSE_PRINT2( "scsi_sense Vendor descriptor (0x%x)", ssd->descriptor_type); } cur_descriptor += cur_len; } analyze: if (!osi->key) { /* scsi sense is Empty, the request was never issued to target * linux return code might tell us what happened. */ if (or->async_error == -ENOMEM) osi->osd_err_pri = OSD_ERR_PRI_RESOURCE; else osi->osd_err_pri = OSD_ERR_PRI_UNREACHABLE; ret = or->async_error; } else if (osi->key <= scsi_sk_recovered_error) { osi->osd_err_pri = 0; ret = 0; } else if (osi->additional_code == scsi_invalid_field_in_cdb) { if (osi->cdb_field_offset == OSD_CFO_STARTING_BYTE) { osi->osd_err_pri = OSD_ERR_PRI_CLEAR_PAGES; ret = -EFAULT; /* caller should recover from this */ } else if (osi->cdb_field_offset == OSD_CFO_OBJECT_ID) { osi->osd_err_pri = OSD_ERR_PRI_NOT_FOUND; ret = -ENOENT; } else if (osi->cdb_field_offset == OSD_CFO_PERMISSIONS) { osi->osd_err_pri = OSD_ERR_PRI_NO_ACCESS; ret = -EACCES; } else { osi->osd_err_pri = OSD_ERR_PRI_BAD_CRED; ret = -EINVAL; } } else if (osi->additional_code == osd_quota_error) { osi->osd_err_pri = OSD_ERR_PRI_NO_SPACE; ret = -ENOSPC; } else if (_is_osd_security_code(osi->additional_code)) { osi->osd_err_pri = OSD_ERR_PRI_BAD_CRED; ret = -EINVAL; } else { osi->osd_err_pri = OSD_ERR_PRI_EIO; ret = -EIO; } if (!or->out.residual) or->out.residual = or->out.total_bytes; if (!or->in.residual) or->in.residual = or->in.total_bytes; return ret; } EXPORT_SYMBOL(osd_req_decode_sense_full); /* * 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 }; enum { OSD_SEC_CAP_V2_ALL_CAPS = OSD_SEC_CAP_V1_ALL_CAPS | OSD_SEC_CAP_QUERY | OSD_SEC_CAP_M_OBJECT }; 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); /* FIXME: Extract version from caps pointer. * Also Pete's target only supports caps from OSDv1 for now */ void osd_set_caps(struct osd_cdb *cdb, const void *caps) { bool is_ver1 = true; /* NOTE: They start at same address */ memcpy(&cdb->v1.caps, caps, is_ver1 ? OSDv1_CAP_LEN : OSD_CAP_LEN); } bool osd_is_sec_alldata(struct osd_security_parameters *sec_parms __unused) { return false; } void osd_sec_sign_cdb(struct osd_cdb *ocdb __unused, const u8 *cap_key __unused) { } void osd_sec_sign_data(void *data_integ __unused, struct bio *bio __unused, const u8 *cap_key __unused) { } /* * Declared in osd_protocol.h * 4.12.5 Data-In and Data-Out buffer offsets * byte offset = mantissa * (2^(exponent+8)) * Returns the smallest allowed encoded offset that contains given @offset * The actual encoded offset returned is @offset + *@padding. */ osd_cdb_offset __osd_encode_offset( u64 offset, unsigned *padding, int min_shift, int max_shift) { u64 try_offset = -1, mod, align; osd_cdb_offset be32_offset; int shift; *padding = 0; if (!offset) return 0; for (shift = min_shift; shift < max_shift; ++shift) { try_offset = offset >> shift; if (try_offset < (1 << OSD_OFFSET_MAX_BITS)) break; } BUG_ON(shift == max_shift); align = 1 << shift; mod = offset & (align - 1); if (mod) { *padding = align - mod; try_offset += 1; } try_offset |= ((shift - 8) & 0xf) << 28; be32_offset = cpu_to_be32((u32)try_offset); OSD_DEBUG("offset=%llu mantissa=%llu exp=%d encoded=%x pad=%d\n", _LLU(offset), _LLU(try_offset & 0x0FFFFFFF), shift, be32_offset, *padding); return be32_offset; }