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Date: Wed, 12 Nov 2008 15:10:32 +0200
From: Boaz Harrosh <bharrosh@...asas.com>
To: Randy Dunlap <randy.dunlap@...cle.com>
CC: James Bottomley <James.Bottomley@...senpartnership.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Jörn Engel <joern@...fs.org>,
open-osd development <osd-dev@...n-osd.org>,
Mike Christie <michaelc@...wisc.edu>,
FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
Jeff Garzik <jeff@...zik.org>,
linux-scsi <linux-scsi@...r.kernel.org>, Sami.Iren@...gate.com,
linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 03/18 ver2] libosd: OSDv1 Headers
Randy Dunlap wrote:
> On Sun, 09 Nov 2008 16:52:36 +0200 Boaz Harrosh wrote:
>
>> Headers only patch.
>>
>> osd_protocol.h
>> Contains a C-fied definition of the T10 OSD standard
>> osd_types.h
>> Contains CPU order common used types
>> osd_initiator.h
>> API definition of the osd_initiator library
>> osd_sec.h
>> Contains High level API for the security manager.
>>
>> [Note that checkpatch spews errors on things that are valid in this context
>> and will not be fixed]
>>
>> Signed-off-by: Boaz Harrosh <bharrosh@...asas.com>
>> Reviewed-by: Benny Halevy <bhalevy@...asas.com>
Thank you Randy for your review, I will post a fixed
patch shortly. I have changed according to your comments
except in one place, see arguments below.
>> ---
>> include/scsi/osd_initiator.h | 332 ++++++++++++++++++++++++++++
>> include/scsi/osd_protocol.h | 497 ++++++++++++++++++++++++++++++++++++++++++
>> include/scsi/osd_sec.h | 45 ++++
>> include/scsi/osd_types.h | 40 ++++
>> 4 files changed, 914 insertions(+), 0 deletions(-)
>> create mode 100644 include/scsi/osd_initiator.h
>> create mode 100644 include/scsi/osd_protocol.h
>> create mode 100644 include/scsi/osd_sec.h
>> create mode 100644 include/scsi/osd_types.h
>>
>> diff --git a/include/scsi/osd_initiator.h b/include/scsi/osd_initiator.h
>> new file mode 100644
>> index 0000000..9bab95d
>> --- /dev/null
>> +++ b/include/scsi/osd_initiator.h
>> @@ -0,0 +1,332 @@
>> +/*
>> + * osd_initiator.h - OSD initiator API definition
>> + *
>> + * Copyright (C) 2008 Panasas Inc. All rights reserved.
>> + *
>> + * Authors:
>> + * Boaz Harrosh <bharrosh@...asas.com>
>> + * Benny Halevy <bhalevy@...asas.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_INITIATOR_H__
>> +#define __OSD_INITIATOR_H__
>> +
>> +#include "osd_protocol.h"
>> +#include "osd_types.h"
>> +
>> +#include <linux/blkdev.h>
>> +
>> +/* Note: "NI" in comments below means "Not Implemented yet" */
>> +
>> +/*
>> + * Object-based Storage Device.
>> + * This object represents an OSD device.
>> + * It is not a full linux device in any way. It is only
>> + * a place to hang resources associated with a Linux
>> + * request Q and some default properties.
>> + */
>> +struct osd_dev {
>> + struct scsi_device *scsi_device;
>> + unsigned def_timeout;
>> +};
>> +
>> +void osd_dev_init(struct osd_dev *, struct scsi_device *scsi_dev);
>
> Don't mix having parameter names and not having them.
> Preferred is having them.
>
I don't know what got into me. I thought it would be more readable this
way. But you are right consistency is very important.
>> +void osd_dev_fini(struct osd_dev *);
>> +
>> +struct osd_request;
>> +typedef void (osd_req_done_fn)(struct osd_request *, void *);
>> +
>> +struct osd_request {
>> + struct osd_cdb cdb;
>> + struct osd_data_out_integrity_info out_data_integ;
>> + struct osd_data_in_integrity_info in_data_integ;
>> +
>> + struct osd_dev *osd_dev;
>> + struct request *request;
>> +
>> + struct _osd_req_data_segment {
>> + void *buff;
>> + unsigned alloc_size; /* 0 here means not allocated by us */
>
> Could/would some other code allocate it, or is the "by us" just redundant?
>
I've changed the comment as it was not clear it is now:
+ unsigned alloc_size; /* 0 here means: don't call kfree */
>> + unsigned total_bytes;
>> + } set_attr, enc_get_attr, get_attr;
>> +
>> + struct _osd_io_info {
>> + struct bio *bio;
>> + u64 total_bytes;
>> + struct request *req;
>> + struct _osd_req_data_segment *last_seg;
>> + u8 *pad_buff;
>> + } out, in;
>> +
>> + gfp_t alloc_flags;
>> + unsigned timeout;
>> + unsigned retries;
>> + u8 sense[OSD_MAX_SENSE_LEN];
>> + enum osd_attributes_mode attributes_mode;
>> +
>> + osd_req_done_fn *async_done;
>> + void *async_private;
>> + int async_error;
>> +};
>> +
>> +/**
>
> Don't start comment blocks with /** when they are not kernel-doc,
> like this one is not.
>
OK, I must confess my kernel-doc total ignorance. I was imagining that
each source file's kernel-doc comments are collected into an html file.
I thought that this comment will be like an introduction to the following
function-by-function reference. Anyway it's fixed
>> + * How to use the osd library:
>> + *
>> + * osd_start_request
>> + * Allocates a request.
>> + *
>> + * osd_req_*
>> + * Call one of, to encode the desired operation.
>> + *
>> + * osd_add_{get,set}_attr
>> + * Optionally add attributes to the CDB, list or page mode.
>> + *
>> + * osd_finalize_request
>> + * Computes final data out/in offsets and signs the request,
>> + * making it ready for execution.
>> + *
>> + * osd_execute_request
>> + * May be called to execute it through the block layer. Other wise submit
>> + * the associated block request in some other way.
>> + *
>> + * After execution:
>> + * osd_req_decode_sense
>> + * Decodes sense information to verify execution results.
>> + *
>> + * osd_req_decode_get_attr
>> + * Retrieve osd_add_get_attr_list() values if used.
>> + *
>> + * osd_end_request
>> + * Must be called to deallocate the request.
>> + */
>> +
>> +/**
>> + * osd_start_request - Allocate and initialize an osd_request
>> + *
>> + * @osd_dev: OSD device that holds the scsi-device and default values
>> + * that the request is associated with.
>> + * @gfp: The allocation flags to use for request allocation, and all
>> + * subsequent allocations. This will be stored at
>> + * osd_request->alloc_flags, can be changed by user later
>> + *
>> + * Allocate osd_request and initialize all members to the
>> + * default/initial state.
>> + */
>> +struct osd_request *osd_start_request(struct osd_dev *, gfp_t gfp);
>> +
>> +enum osd_req_options {
>> + OSD_REQ_FUA = 0x08, /* Force Unit Access */
>> + OSD_REQ_DPO = 0x10, /* Disable Page Out */
>> +
>> + OSD_REQ_BYPASS_TIMESTAMPS = 0x80,
>> +};
>> +
>> +/**
>> + * osd_finalize_request - Sign request and prepare request for execution
>> + *
>> + * @or: osd_request to prepare
>> + * @options: combination of osd_req_options bit flags or 0.
>> + * @cap A Pointer to an OSD_CAP_LEN bytes buffer that is received from
>> + * The security manager as capabilities for this cdb.
>> + * @cap_key The cryptographic key used to sign the cdb/data. Can be null
>> + * if NOSEC is used.
>
> Last 2 parameters need a ':' after the @param_name, like the first 2 have.
>
oops
>> + *
>> + * The actual request and bios are only allocated here, so are the get_attr
>> + * buffers that will receive the returned attributes. Copy's @cap to cdb.
>> + * Sign the cdb/data with @cap_key.
>> + */
>> +int osd_finalize_request(struct osd_request *or,
>> + u8 options, const void *cap, const u8 *cap_key);
>> +
>> +/**
>> + * osd_execute_request - Execute the request synchronously through
>> + * the block-layer
>
> Function name and short description need to be on one line.
>
OK I re-worded so it will fit in one line. What happens if it does not
fit, both name and description, in 80 characters? is there a continuation
symbol or something?
>> + * @or: osd_request to Executed
>> + *
>> + * Calls blk_execute_rq to q the command and waits for completion.
>> + */
>> +int osd_execute_request(struct osd_request *or);
>> +
>> +/**
>> + * osd_execute_request_async - submits the request for execution through
>> + * the block-layer without waitting.
>
> Ditto.
>
>> + * @or: - osd_request to Executed
>> + * @done: (Optional) - Called at end of execution
>> + * @private: - Will be passes to @done function
>
> s/passes/passed/
>
Thanks
>> + *
>> + * Calls blk_execute_rq_nowait to q the command. When execution is done
>> + * Optionally calles @done with @private as parameter. or->async_error has the
>
> s/calles/calls/
>
>> + * Return code
>
> and don't start each line with a Capital letter since they are not the
> beginning of sentences. What's with that period ('.') before "or->async_error"
> (which needs a space after "or").
>
I reworded these so they are more clear, I hope.
>
>> + */
>> +int osd_execute_request_async(struct osd_request *or,
>> + osd_req_done_fn *done, void *private);
>> +
>> +/**
>> + * osd_end_request - return osd_request to free store
>> + *
>> + * @or: osd_request to free
>> + *
>> + * Deallocate all osd_request resources (struct req's, BIOs, buffers, etc.)
>> + */
>> +void osd_end_request(struct osd_request *or);
>> +
>> +/*
>> + * CDB Encoding
>> + *
>> + * Note: call only one of the following methods.
>> + */
>> +
>> +/*
>> + * Device commands
>> + */
>> +void osd_req_set_master_seed_xchg(struct osd_request *, ...);/* NI */
>> +void osd_req_set_master_key(struct osd_request *, ...);/* NI */
>> +
>> +void osd_req_format(struct osd_request *, u64 tot_capacity);
>> +
>> +/* list all partitions
>> + * @list header must be initialized to zero on first run.
>> + *
>> + * Call osd_is_obj_list_done() to find if we got the complete list.
>> + */
>> +int osd_req_list_dev_partitions(struct osd_request *,
>> + osd_id initial_id, struct osd_obj_id_list *list, unsigned nelem);
>> +
>> +void osd_req_flush_obsd(struct osd_request *,
>> + enum osd_options_flush_scope_values);
>> +
>> +void osd_req_perform_scsi_command(struct osd_request *,
>> + const u8 *cdb, ...);/* NI */
>> +void osd_req_task_management(struct osd_request *, ...);/* NI */
>> +
>> +/*
>> + * Partition commands
>> + */
>> +void osd_req_create_partition(struct osd_request *, osd_id partition);
>> +void osd_req_remove_partition(struct osd_request *, osd_id partition);
>> +
>> +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]);/* NI */
>> +
>> +/* list all collections in the partition
>> + * @list header must be init to zero on first run.
>> + *
>> + * Call osd_is_obj_list_done() to find if we got the complete list.
>> + */
>> +int osd_req_list_partition_collections(struct osd_request *,
>> + osd_id partition, osd_id initial_id, struct osd_obj_id_list *list,
>> + unsigned nelem);
>> +
>> +/* list all objects in the partition
>> + * @list header must be init to zero on first run.
>> + *
>> + * Call osd_is_obj_list_done() to find if we got the complete list.
>> + */
>> +int osd_req_list_partition_objects(struct osd_request *,
>> + osd_id partition, osd_id initial_id, struct osd_obj_id_list *list,
>> + unsigned nelem);
>> +
>> +void osd_req_flush_partition(struct osd_request *,
>> + osd_id partition, enum osd_options_flush_scope_values);
>> +
>> +/*
>> + * Collection commands
>> + */
>> +void osd_req_create_collection(struct osd_request *,
>> + const struct osd_obj_id *);/* NI */
>> +void osd_req_remove_collection(struct osd_request *,
>> + const struct osd_obj_id *);/* NI */
>> +
>> +/* list all objects in the collection */
>> +int osd_req_list_collection_objects(struct osd_request *,
>> + const struct osd_obj_id *, osd_id initial_id,
>> + struct osd_obj_id_list *list, unsigned nelem);
>> +
>> +/* V2 only filtered list of objects in the collection */
>> +void osd_req_query(struct osd_request *, ...);/* NI */
>> +
>> +void osd_req_flush_collection(struct osd_request *,
>> + const struct osd_obj_id *, enum osd_options_flush_scope_values);
>> +
>> +void osd_req_get_member_attrs(struct osd_request *, ...);/* V2-only NI */
>> +void osd_req_set_member_attrs(struct osd_request *, ...);/* V2-only NI */
>> +
>> +/*
>> + * Object commands
>> + */
>> +void osd_req_create_object(struct osd_request *, struct osd_obj_id *);
>> +void osd_req_remove_object(struct osd_request *, struct osd_obj_id *);
>> +
>> +void osd_req_write(struct osd_request *,
>> + const struct osd_obj_id *, struct bio *data_out, u64 offset);
>> +void osd_req_append(struct osd_request *,
>> + const struct osd_obj_id *, struct bio *data_out);/* NI */
>> +void osd_req_create_write(struct osd_request *,
>> + const struct osd_obj_id *, struct bio *data_out, u64 offset);/* NI */
>> +void osd_req_clear(struct osd_request *,
>> + const struct osd_obj_id *, u64 offset, u64 len);/* NI */
>> +void osd_req_punch(struct osd_request *,
>> + const struct osd_obj_id *, u64 offset, u64 len);/* V2-only NI */
>> +
>> +void osd_req_flush_object(struct osd_request *,
>> + const struct osd_obj_id *, enum osd_options_flush_scope_values,
>> + /*V2*/ u64 offset, /*V2*/ u64 len);
>> +
>> +void osd_req_read(struct osd_request *,
>> + const struct osd_obj_id *, struct bio *data_in, u64 offset);
>> +
>> +/*
>> + * Root/Partition/Collection/Object Attributes commands
>> + */
>> +
>> +/* get before set */
>> +void osd_req_get_attributes(struct osd_request *, const struct osd_obj_id *);
>> +
>> +/* set before get */
>> +void osd_req_set_attributes(struct osd_request *, const struct osd_obj_id *);
>> +
>> +/*
>> + * Attributes appended to most commands
>> + */
>> +
>> +/* Attributes List mode (or V2 CDB) */
>> + /*
>> + * TODO: In ver2 if at finalize time only one attr was set and no gets,
>> + * then the Attributes CDB mode is used automatically to save IO.
>> + */
>> +
>> +/* set a list of attributes. */
>> +int osd_req_add_set_attr_list(struct osd_request *,
>> + const struct osd_attr *, unsigned nelem);
>> +
>> +/* get a list of attributes */
>> +int osd_req_add_get_attr_list(struct osd_request *,
>> + const struct osd_attr *, unsigned nelem);
>> +
>> +/*
>> + * Attributes list decoding
>> + * Must be called after osd_request.request was executed
>> + * It is called in a loop to decode the returned get_attr
>> + * (see osd_add_get_attr)
>> + */
>> +int osd_req_decode_get_attr_list(struct osd_request *,
>> + struct osd_attr *, int *nelem, void **iterator);
>> +
>> +/* Attributes Page mode */
>> +
>> +/*
>> + * Read an attribute page and optionally set one attribute
>> + *
>> + * Retrieves the attribute page directly to a user buffer.
>> + * @attr_page_data shall stay valid until end of execution.
>> + * See osd_attributes.h for common page structures
>> + */
>> +int osd_req_add_get_attr_page(struct osd_request *,
>> + u32 page_id, void *attr_page_data, unsigned max_page_len,
>> + const struct osd_attr *set_one);
>> +
>> +#endif /* __OSD_LIB_H__ */
>> diff --git a/include/scsi/osd_protocol.h b/include/scsi/osd_protocol.h
>> new file mode 100644
>> index 0000000..77a74a3
>> --- /dev/null
>> +++ b/include/scsi/osd_protocol.h
>> @@ -0,0 +1,497 @@
>> +/*
>> + * osd_protocol.h - OSD T10 standard C definitions.
>> + *
>> + * Copyright (C) 2008 Panasas Inc. All rights reserved.
>> + *
>> + * Authors:
>> + * Boaz Harrosh <bharrosh@...asas.com>
>> + * Benny Halevy <bhalevy@...asas.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 file contains types and constants that are defined by the protocol
>> + * Note: All names and symbols are taken from the OSD standard's text.
>> + */
>> +#ifndef __OSD_PROTOCOL_H__
>> +#define __OSD_PROTOCOL_H__
>> +
>> +#include <linux/types.h>
>> +#include <asm/unaligned.h>
>> +#include <scsi/scsi.h>
>> +
>> +enum {
>> + OSDv1_ADDITIONAL_CDB_LENGTH = 192,
>> + OSDv1_TOTAL_CDB_LEN = OSDv1_ADDITIONAL_CDB_LENGTH + 8,
>> + OSDv1_CAP_LEN = 80,
>> + /* Latest supported version */
>> + OSD_ADDITIONAL_CDB_LENGTH = OSDv1_ADDITIONAL_CDB_LENGTH,
>> + OSD_TOTAL_CDB_LEN = OSDv1_TOTAL_CDB_LEN,
>> + OSD_CAP_LEN = OSDv1_CAP_LEN,
>> +
>> + OSD_SYSTEMID_LEN = 20,
>> + OSD_CRYPTO_KEYID_SIZE = 20,
>> + OSD_CRYPTO_SEED_SIZE = 4,
>> + OSD_CRYPTO_NONCE_SIZE = 12,
>> + OSD_MAX_SENSE_LEN = 252, /* from SPC-3 */
>> +
>> + OSD_PARTITION_FIRST_ID = 0x10000,
>> + OSD_OBJECT_FIRST_ID = 0x10000,
>> +};
>> +
>> +/* (osd-r10 5.2.4)
>> + * osd2r03: 5.2.3 Caching control bits
>> + */
>> +enum osd_options_byte {
>> + OSD_CDB_FUA = 0x08, /* Force Unit Access */
>> + OSD_CDB_DPO = 0x10, /* Disable Page Out */
>> +};
>> +
>> +/*
>> + * osd2r03: 5.2.5 Isolation.
>> + * First 3 bits, V2-only.
>> + * Also for attr 110h "default isolation method" at Root Information page
>> + */
>> +enum osd_options_byte_isolation {
>> + OSD_ISOLATION_DEFAULT = 0,
>> + OSD_ISOLATION_NONE = 1,
>> + OSD_ISOLATION_STRICT = 2,
>> + OSD_ISOLATION_RANGE = 4,
>> + OSD_ISOLATION_FUNCTIONAL = 5,
>> + OSD_ISOLATION_VENDOR = 7,
>> +};
>> +
>> +/* (osd-r10: 6.7)
>> + * osd2r03: 6.8 FLUSH, FLUSH COLLECTION, FLUSH OSD, FLUSH PARTITION
>> + */
>> +enum osd_options_flush_scope_values {
>> + OSD_CDB_FLUSH_ALL = 0,
>> + OSD_CDB_FLUSH_ATTR_ONLY = 1,
>> +
>> + OSD_CDB_FLUSH_ALL_RECURSIVE = 2,
>> + /* V2-only */
>> + OSD_CDB_FLUSH_ALL_RANGE = 2,
>> +};
>> +
>> +/* osd2r03: 5.2.10 Timestamps control */
>> +enum {
>> + OSD_CDB_NORMAL_TIMESTAMPS = 0,
>> + OSD_CDB_BYPASS_TIMESTAMPS = 0x7f,
>> +};
>> +
>> +/* (osd-r10: 5.2.2.1)
>> + * osd2r03: 5.2.4.1 Get and set attributes CDB format selection
>> + * 2 bits at second nibble of command_specific_options byte
>> + */
>> +enum osd_attributes_mode {
>> + /* V2-only */
>> + OSD_CDB_SET_ONE_ATTR = 0x10,
>> +
>> + OSD_CDB_GET_ATTR_PAGE_SET_ONE = 0x20,
>> + OSD_CDB_GET_SET_ATTR_LISTS = 0x30,
>> +
>> + OSD_CDB_GET_SET_ATTR_MASK = 0x30,
>> +};
>> +
>> +/* (osd-r10: 4.12.5)
>> + * osd2r03: 4.14.5 Data-In and Data-Out buffer offsets
>> + * byte offset = mantissa * (2^(exponent+8))
>> + * struct {
>> + * unsigned mantissa: 28;
>> + * int exponent: 04;
>> + * }
>> + */
>> +typedef __be32 __bitwise osd_cdb_offset;
>> +
>> +enum {
>> + OSD_OFFSET_UNUSED = 0xFFFFFFFF,
>> + OSD_OFFSET_MAX_BITS = 28,
>> +
>> + OSDv1_OFFSET_MIN_SHIFT = 8,
>> + OSD_OFFSET_MAX_SHIFT = 16,
>> +};
>> +
>> +/* Return the smallest allowed encoded offset that contains @offset.
>> + *
>> + * The actual encoded offset returned is @offset + *padding.
>> + * (up to max_shift, non-inclusive)
>> + */
>> +osd_cdb_offset __osd_encode_offset(u64 offset, unsigned *padding,
>> + int min_shift, int max_shift);
>> +
>> +/* Minimum alignment is 256 bytes
>> + * Note: Seems from std v1 that exponent can be from 0+8 to 0xE+8 (inclusive)
>> + * which is 8 to 23 but IBM code restricts it to 16, so be it.
>> + */
>> +static inline osd_cdb_offset osd_encode_offset_v1(u64 offset, unsigned *padding)
>> +{
>> + return __osd_encode_offset(offset, padding,
>> + OSDv1_OFFSET_MIN_SHIFT, OSD_OFFSET_MAX_SHIFT);
>> +}
>> +
>> +/* osd2r03: 5.2.1 Overview */
>> +struct osd_cdb_head {
>> + struct scsi_varlen_cdb_hdr varlen_cdb;
>> +/*10*/ u8 options;
>> + u8 command_specific_options;
>> + u8 timestamp_control;
>> +/*13*/ u8 reserved1[3];
>> +/*16*/ __be64 partition;
>> +/*24*/ __be64 object;
>> +/*32*/ union { /* V1 vs V2 alignment differences */
>> + struct __osdv1_cdb_addr_len {
>> +/*32*/ __be32 list_identifier;/* Rarely used */
>> +/*36*/ __be64 length;
>> +/*44*/ __be64 start_address;
>> + } __packed v1;
>> + };
>> +/*52*/ union { /* selected attributes mode Page/List/Single */
>> + struct osd_attributes_page_mode {
>> +/*52*/ __be32 get_attr_page;
>> +/*56*/ __be32 get_attr_alloc_length;
>> +/*60*/ osd_cdb_offset get_attr_offset;
>> +
>> +/*64*/ __be32 set_attr_page;
>> +/*68*/ __be32 set_attr_id;
>> +/*72*/ __be32 set_attr_length;
>> +/*76*/ osd_cdb_offset set_attr_offset;
>> + } __packed attrs_page;
>> +
>> + struct osd_attributes_list_mode {
>> +/*52*/ __be32 get_attr_desc_bytes;
>> +/*56*/ osd_cdb_offset get_attr_desc_offset;
>> +
>> +/*60*/ __be32 get_attr_alloc_length;
>> +/*64*/ osd_cdb_offset get_attr_offset;
>> +
>> +/*68*/ __be32 set_attr_bytes;
>> +/*72*/ osd_cdb_offset set_attr_offset;
>> + __be32 not_used;
>> + } __packed attrs_list;
>> +
>> + /* osd2r03:5.2.4.2 Set one attribute value using CDB fields */
>> + struct osd_attributes_cdb_mode {
>> +/*52*/ __be32 set_attr_page;
>> +/*56*/ __be32 set_attr_id;
>> +/*60*/ __be16 set_attr_len;
>> +/*62*/ u8 set_attr_val[80-62];
>> + } __packed attrs_cdb;
>> +/*52*/ u8 get_set_attributes_parameters[80-52];
>> + };
>> +} __packed;
>> +/*80*/
>> +
>> +/*160 v1*/
>> +struct osd_security_parameters {
>> +/*160*/u8 integrity_check_value[OSD_CRYPTO_KEYID_SIZE];
>> +/*180*/u8 request_nonce[OSD_CRYPTO_NONCE_SIZE];
>> +/*192*/osd_cdb_offset data_in_integrity_check_offset;
>> +/*196*/osd_cdb_offset data_out_integrity_check_offset;
>> +} __packed;
>> +/*200 v1*/
>> +
>> +struct osdv1_cdb {
>> + struct osd_cdb_head h;
>> + u8 caps[OSDv1_CAP_LEN];
>> + struct osd_security_parameters sec_params;
>> +} __packed;
>> +
>> +struct osd_cdb {
>> + union {
>> + struct osdv1_cdb v1;
>> + u8 buff[OSD_TOTAL_CDB_LEN];
>> + };
>> +} __packed;
>> +
>> +static inline struct osd_cdb_head *osd_cdb_head(struct osd_cdb *ocdb)
>> +{
>> + return (struct osd_cdb_head *)ocdb->buff;
>> +}
>> +
>> +/* define both version actions
>> + * Ex name = FORMAT_OSD we have OSD_ACT_FORMAT_OSD && OSDv1_ACT_FORMAT_OSD
>> + */
>> +#define OSD_ACT___(Name, Num) \
>> + OSD_ACT_##Name = __constant_cpu_to_be16(0x8880 + Num), \
>> + OSDv1_ACT_##Name = __constant_cpu_to_be16(0x8800 + Num),
>> +
>> +/* V2 only actions */
>> +#define OSD_ACT_V2(Name, Num) \
>> + OSD_ACT_##Name = __constant_cpu_to_be16(0x8880 + Num),
>> +
>> +#define OSD_ACT_V1_V2(Name, Num1, Num2) \
>> + OSD_ACT_##Name = __constant_cpu_to_be16(Num2), \
>> + OSDv1_ACT_##Name = __constant_cpu_to_be16(Num1),
>> +
>> +enum osd_service_actions {
>> + OSD_ACT_V2(OBJECT_STRUCTURE_CHECK, 0x00)
>> + OSD_ACT___(FORMAT_OSD, 0x01)
>> + OSD_ACT___(CREATE, 0x02)
>> + OSD_ACT___(LIST, 0x03)
>> + OSD_ACT_V2(PUNCH, 0x04)
>> + OSD_ACT___(READ, 0x05)
>> + OSD_ACT___(WRITE, 0x06)
>> + OSD_ACT___(APPEND, 0x07)
>> + OSD_ACT___(FLUSH, 0x08)
>> + OSD_ACT_V2(CLEAR, 0x09)
>> + OSD_ACT___(REMOVE, 0x0A)
>> + OSD_ACT___(CREATE_PARTITION, 0x0B)
>> + OSD_ACT___(REMOVE_PARTITION, 0x0C)
>> + OSD_ACT___(GET_ATTRIBUTES, 0x0E)
>> + OSD_ACT___(SET_ATTRIBUTES, 0x0F)
>> + OSD_ACT___(CREATE_AND_WRITE, 0x12)
>> + OSD_ACT___(CREATE_COLLECTION, 0x15)
>> + OSD_ACT___(REMOVE_COLLECTION, 0x16)
>> + OSD_ACT___(LIST_COLLECTION, 0x17)
>> + OSD_ACT___(SET_KEY, 0x18)
>> + OSD_ACT___(SET_MASTER_KEY, 0x19)
>> + OSD_ACT___(FLUSH_COLLECTION, 0x1A)
>> + OSD_ACT___(FLUSH_PARTITION, 0x1B)
>> + OSD_ACT___(FLUSH_OSD, 0x1C)
>> +
>> + OSD_ACT_V2(QUERY, 0x20)
>> + OSD_ACT_V2(REMOVE_MEMBER_OBJECTS, 0x21)
>> + OSD_ACT_V2(GET_MEMBER_ATTRIBUTES, 0x22)
>> + OSD_ACT_V2(SET_MEMBER_ATTRIBUTES, 0x23)
>> + OSD_ACT_V2(READ_MAP, 0x31)
>> +
>> + OSD_ACT_V1_V2(PERFORM_SCSI_COMMAND, 0x8F7E, 0x8F7C)
>> + OSD_ACT_V1_V2(SCSI_TASK_MANAGEMENT, 0x8F7F, 0x8F7D)
>> + /* 0x8F80 to 0x8FFF are Vendor specific */
>> +};
>> +
>> +/* osd2r03: 7.1.3.2 List entry format for retrieving attributes */
>> +struct osd_attributes_list_attrid {
>> + __be32 page;
>> + __be32 attr_id;
>> +} __packed;
>> +
>> +/*
>> + * osd2r03: 7.1.3.3 List entry format for retrieved attributes and
>> + * for setting attributes
>> + */
>> +struct osd_attributes_list_element {
>> + __be32 page;
>> + __be32 attr_id;
>> + __be16 attr_bytes;
>> + u8 attr_val[0];
>> +} __packed;
>> +
>> +enum {
>> + OSDv1_ATTRIBUTES_ELEM_ALIGN = 1,
>> +};
>> +
>> +enum {
>> + OSD_ATTR_LIST_ALL_PAGES = 0xFFFFFFFF,
>> + OSD_ATTR_LIST_ALL_IN_PAGE = 0xFFFFFFFF,
>> +};
>> +
>> +static inline unsigned osdv1_attr_list_elem_size(unsigned len)
>> +{
>> + return ALIGN(len + sizeof(struct osd_attributes_list_element),
>> + OSDv1_ATTRIBUTES_ELEM_ALIGN);
>> +}
>> +
>> +/*
>> + * osd2r03: 7.1.3 OSD attributes lists (Table 184) — List type values
>> + */
>> +enum osd_attr_list_types {
>> + OSD_ATTR_LIST_GET = 0x1, /* descriptors only */
>> + OSD_ATTR_LIST_SET_RETRIEVE = 0x9, /*descriptors/values variable-length*/
>> + OSD_V2_ATTR_LIST_MULTIPLE = 0xE, /* ver2, Multiple Objects lists*/
>> + OSD_V1_ATTR_LIST_CREATE_MULTIPLE = 0xF,/*ver1, used by create_multple*/
>> +};
>> +
>> +/* osd2r03: 7.1.3.4 Multi-object retrieved attributes format */
>> +struct osd_attributes_list_multi_header {
>> + __be64 object_id;
>> + u8 object_type; /* object_type enum below */
>> + u8 reserved[5];
>> + __be16 list_bytes;
>> + /* followed by struct osd_attributes_list_element's */
>> +};
>> +
>> +struct osdv1_attributes_list_header {
>> + u8 type; /* low 4-bit only */
>> + u8 pad;
>> + __be16 list_bytes; /* Initiator shall set to Zero. Only set by target */
>> + /*
>> + * type=9 followed by struct osd_attributes_list_element's
>> + * type=E followed by struct osd_attributes_list_multi_header's
>> + */
>> +} __packed;
>> +
>> +static inline unsigned osdv1_list_size(struct osdv1_attributes_list_header *h)
>> +{
>> + return be16_to_cpu(h->list_bytes);
>> +}
>> +
>> +/* (osd-r10 6.13)
>> + * osd2r03: 6.15 LIST (Table 79) LIST command parameter data.
>> + * for root_lstchg below
>> + */
>> +enum {
>> + OSD_OBJ_ID_LIST_PAR = 0x1, /* V1-only. Not used in V2 */
>> + OSD_OBJ_ID_LIST_LSTCHG = 0x2,
>> +};
>> +
>> +/*
>> + * osd2r03: 6.15.2 LIST command parameter data
>> + * (Also for LIST COLLECTION)
>> + */
>> +struct osd_obj_id_list {
>> + __be64 list_bytes; /* bytes in list excluding list_bytes (-8) */
>> + __be64 continuation_id;
>> + __be32 list_identifier;
>> + u8 pad[3];
>> + u8 root_lstchg;
>> + __be64 object_ids[0];
>> +} __packed;
>> +
>> +static inline bool osd_is_obj_list_done(struct osd_obj_id_list *list,
>> + bool *is_changed)
>> +{
>> + *is_changed = (0 != (list->root_lstchg & OSD_OBJ_ID_LIST_LSTCHG));
>> + return 0 != list->continuation_id;
>> +}
>> +
>> +/*
>> + * osd2r03: 4.12.4.5 The ALLDATA security method
>> + */
>> +struct osd_data_out_integrity_info {
>> + __be64 data_bytes;
>> + __be64 set_attributes_bytes;
>> + __be64 get_attributes_bytes;
>> + __be64 integrity_check_value;
>> +} __packed;
>> +
>> +struct osd_data_in_integrity_info {
>> + __be64 data_bytes;
>> + __be64 retrieved_attributes_bytes;
>> + __be64 integrity_check_value;
>> +} __packed;
>> +
>> +struct osd_timestamp {
>> + u8 time[6]; /* number of milliseconds since 1/1/1970 UT (big endian) */
>> +} __packed;
>> +/* FIXME: define helper functions to convert to/from osd time format */
>> +
>> +/*
>> + * Capability & Security definitions
>> + * osd2r03: 4.11.2.2 Capability format
>> + * osd2r03: 5.2.8 Security parameters
>> + */
>> +
>> +struct osd_key_identifier {
>> + u8 id[7]; /* if you know why 7 please email bharrosh@...asas.com */
>> +} __packed;
>> +
>> +/* for osd_capability.format */
>> +enum {
>> + OSD_SEC_CAP_FORMAT_NO_CAPS = 0,
>> + OSD_SEC_CAP_FORMAT_VER1 = 1,
>> + OSD_SEC_CAP_FORMAT_VER2 = 2,
>> +};
>> +
>> +/* security_method */
>> +enum {
>> + OSD_SEC_NOSEC = 0,
>> + OSD_SEC_CAPKEY = 1,
>> + OSD_SEC_CMDRSP = 2,
>> + OSD_SEC_ALLDATA = 3,
>> +};
>> +
>> +enum object_type {
>> + OSD_SEC_OBJ_ROOT = 0x1,
>> + OSD_SEC_OBJ_PARTITION = 0x2,
>> + OSD_SEC_OBJ_COLLECTION = 0x40,
>> + OSD_SEC_OBJ_USER = 0x80,
>> +};
>> +
>> +enum osd_capability_bit_masks {
>> + OSD_SEC_CAP_APPEND = (1 << 0),
>> + OSD_SEC_CAP_OBJ_MGMT = (1 << 1),
>> + OSD_SEC_CAP_REMOVE = (1 << 2),
>> + OSD_SEC_CAP_CREATE = (1 << 3),
>> + OSD_SEC_CAP_SET_ATTR = (1 << 4),
>> + OSD_SEC_CAP_GET_ATTR = (1 << 5),
>> + OSD_SEC_CAP_WRITE = (1 << 6),
>> + OSD_SEC_CAP_READ = (1 << 7),
>> +
>> + OSD_SEC_CAP_NONE1 = (1 << 8),
>> + OSD_SEC_CAP_NONE2 = (1 << 9),
>> + OSD_SEC_CAP_NONE3 = (1 << 10),
>> + OSD_SEC_CAP_QUERY = (1 << 11), /*v2 only*/
>> + OSD_SEC_CAP_M_OBJECT = (1 << 12), /*v2 only*/
>> + OSD_SEC_CAP_POL_SEC = (1 << 13),
>> + OSD_SEC_CAP_GLOBAL = (1 << 14),
>> + OSD_SEC_CAP_DEV_MGMT = (1 << 15),
>
> These could use BIT(nr) from bitops.h.
>
Thanks. It looks much better with this macro.
>> +};
>> +
>> +/* for object_descriptor_type (hi nibble used) */
>> +enum {
>> + OSD_SEC_OBJ_DESC_NONE = 0, /* Not allowed */
>> + OSD_SEC_OBJ_DESC_OBJ = 1 << 4, /* v1: also collection */
>> + OSD_SEC_OBJ_DESC_PAR = 2 << 4, /* also root */
>> + OSD_SEC_OBJ_DESC_COL = 3 << 4, /* v2 only */
>> +};
>> +
>> +/* (osd-r10:4.9.2.2)
>> + * osd2r03:4.11.2.2 Capability format
>> + */
>> +struct osd_capability_head {
>> + u8 format; /* low nibble */
>> + u8 integrity_algorithm__key_version; /* MAKE_BYTE(integ_alg, key_ver) */
>> + u8 security_method;
>> + u8 reserved1;
>> +/*04*/ struct osd_timestamp expiration_time;
>> +/*10*/ u8 audit[30-10];
>> +/*30*/ u8 discriminator[42-30];
>> +/*42*/ struct osd_timestamp object_created_time;
>> +/*48*/ u8 object_type;
>> + u8 permissions_bit_mask[54-49];
>
> The offset comments are OK with me, but please lose the [b-a] length specifiers.
>
I would, please, like to keep them. For the user it does not matter.
Because he is not suppose to care if he is doing:
- memset(och->permissions_bit_mask, 0, 5); // BAD
+ memset(och->permissions_bit_mask, 0, sizeof(och->permissions_bit_mask)); // GOOD
But for the protocol reader / debuggerer this is much easier since this is the
way he will see them on the wire and the way it is laid out in the standard text.
It was much easier to read the standard text and develop the header this way, complicated
by the fact that OSD v2 was a moving target and the changes from OSD v1. And it helped in
finding bugs. Now to go over all of them and calculate the difference and remove it. I'm
loosing information, and I feel sad to loose it.
But if you are totally not convinced I will remove them?
>
>> +/*54*/ u8 reserved2;
>> +/*55*/ u8 object_descriptor_type; /* high nibble */
>> +} __packed;
>> +
>> +/*56 v1*/
>> +struct osdv1_cap_object_descriptor {
>> + union {
>> + struct {
>> +/*56*/ __be32 policy_access_tag;
>> +/*60*/ __be64 allowed_partition_id;
>> +/*68*/ __be64 allowed_object_id;
>> +/*76*/ __be32 reserved;
>> + } __packed obj_desc;
>> +
>> + u8 object_descriptor[80-56];/*24*/
>> + };
>> +} __packed;
>> +/*80 v1*/
>> +
>> +struct osd_capability {
>> + struct osd_capability_head h;
>> + struct osdv1_cap_object_descriptor od;
>> +} __packed;
>> +
>> +/**
>> + * osd_sec_set_caps - set cap-bits into the capabilities header
>> + *
>> + * @cap: The osd_capability_head to set cap bits to.
>> + * @bit_mask: Use an ORed list of enum osd_capability_bit_masks values
>> + *
>> + * permissions_bit_mask is unaligned use below to set into caps
>> + * in a version independent way
>> + */
>> +static inline void osd_sec_set_caps(struct osd_capability_head *cap,
>> + u16 bit_mask)
>> +{
>> + /*
>> + *Note: The bits above are defined LE order this is because this way
>> + * they can grow in the future to more then 16, and still retain
>> + * there constant values.
>> + */
>> + put_unaligned_le16(bit_mask, &cap->permissions_bit_mask);
>> +}
>> +
>> +#endif /* ndef __OSD_PROTOCOL_H__ */
>
> ---
> ~Randy
Thanks
Boaz
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