diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/osd/Kbuild | 32 | ||||
| -rwxr-xr-x | drivers/scsi/osd/Makefile | 37 | ||||
| -rw-r--r-- | drivers/scsi/osd/osd_debug.h | 30 | ||||
| -rw-r--r-- | drivers/scsi/osd/osd_initiator.c | 448 |
4 files changed, 547 insertions, 0 deletions
diff --git a/drivers/scsi/osd/Kbuild b/drivers/scsi/osd/Kbuild new file mode 100644 index 00000000000..a95e0251005 --- /dev/null +++ b/drivers/scsi/osd/Kbuild @@ -0,0 +1,32 @@ +# +# Kbuild for the OSD modules +# +# 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 +# + +ifneq ($(OSD_INC),) +# we are built out-of-tree Kconfigure everything as on + +CONFIG_SCSI_OSD_INITIATOR=m +ccflags-y += -DCONFIG_SCSI_OSD_INITIATOR -DCONFIG_SCSI_OSD_INITIATOR_MODULE + +# Uncomment to turn debug on +# ccflags-y += -DCONFIG_SCSI_OSD_DEBUG + +# if we are built out-of-tree and the hosting kernel has OSD headers +# then "ccflags-y +=" will not pick the out-off-tree headers. Only by doing +# this it will work. This might break in future kernels +LINUXINCLUDE := -I$(OSD_INC) $(LINUXINCLUDE) + +endif + +# libosd.ko - osd-initiator library +libosd-y := osd_initiator.o +obj-$(CONFIG_SCSI_OSD_INITIATOR) += libosd.o diff --git a/drivers/scsi/osd/Makefile b/drivers/scsi/osd/Makefile new file mode 100755 index 00000000000..d905344f83b --- /dev/null +++ b/drivers/scsi/osd/Makefile @@ -0,0 +1,37 @@ +# +# Makefile for the OSD modules (out of tree) +# +# 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 +# +# This Makefile is used to call the kernel Makefile in case of an out-of-tree +# build. +# $KSRC should point to a Kernel source tree otherwise host's default is +# used. (eg. /lib/modules/`uname -r`/build) + +# include path for out-of-tree Headers +OSD_INC ?= `pwd`/../../../include + +# allow users to override these +# e.g. to compile for a kernel that you aren't currently running +KSRC ?= /lib/modules/$(shell uname -r)/build +KBUILD_OUTPUT ?= +ARCH ?= +V ?= 0 + +# this is the basic Kbuild out-of-tree invocation, with the M= option +KBUILD_BASE = +$(MAKE) -C $(KSRC) M=`pwd` KBUILD_OUTPUT=$(KBUILD_OUTPUT) ARCH=$(ARCH) V=$(V) + +all: libosd + +libosd: ; + $(KBUILD_BASE) OSD_INC=$(OSD_INC) modules + +clean: + $(KBUILD_BASE) clean diff --git a/drivers/scsi/osd/osd_debug.h b/drivers/scsi/osd/osd_debug.h new file mode 100644 index 00000000000..579e491f11d --- /dev/null +++ b/drivers/scsi/osd/osd_debug.h @@ -0,0 +1,30 @@ +/* + * osd_debug.h - Some kprintf macros + * + * 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 + * + */ +#ifndef __OSD_DEBUG_H__ +#define __OSD_DEBUG_H__ + +#define OSD_ERR(fmt, a...) printk(KERN_ERR "osd: " fmt, ##a) +#define OSD_INFO(fmt, a...) printk(KERN_NOTICE "osd: " fmt, ##a) + +#ifdef CONFIG_SCSI_OSD_DEBUG +#define OSD_DEBUG(fmt, a...) \ + printk(KERN_NOTICE "osd @%s:%d: " fmt, __func__, __LINE__, ##a) +#else +#define OSD_DEBUG(fmt, a...) do {} while (0) +#endif + +/* u64 has problems with printk this will cast it to unsigned long long */ +#define _LLU(x) (unsigned long long)(x) + +#endif /* ndef __OSD_DEBUG_H__ */ diff --git a/drivers/scsi/osd/osd_initiator.c b/drivers/scsi/osd/osd_initiator.c new file mode 100644 index 00000000000..0e6d906f111 --- /dev/null +++ b/drivers/scsi/osd/osd_initiator.c @@ -0,0 +1,448 @@ +/* + * 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); +} |