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freebsd/sys/cam/ctl/ctl_ioctl.h
Edward Tomasz Napierala 811772950f Add LUN resizing to CTL. Also make it possible to explicitly set 
size when creating file-backed or device-backed LUN.

Reviewed by:	ken (earlier version)
Sponsored by:	The FreeBSD Foundation
2012-03-06 13:43:57 +00:00

621 lines
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/*-
* Copyright (c) 2003 Silicon Graphics International Corp.
* Copyright (c) 2011 Spectra Logic Corporation
* All rights reserved.
*
* 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,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
*
* $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_ioctl.h#4 $
* $FreeBSD$
*/
/*
* CAM Target Layer ioctl interface.
*
* Author: Ken Merry <ken@FreeBSD.org>
*/
#ifndef _CTL_IOCTL_H_
#define _CTL_IOCTL_H_
#define CTL_DEFAULT_DEV "/dev/cam/ctl"
/*
* Maximum number of targets we support.
*/
#define CTL_MAX_TARGETS 1
/*
* Maximum target ID we support.
*/
#define CTL_MAX_TARGID 15
/*
* Maximum number of LUNs we support at the moment. MUST be a power of 2.
*/
#define CTL_MAX_LUNS 256
/*
* Maximum number of initiators per port.
*/
#define CTL_MAX_INIT_PER_PORT 2048 // Was 16
/*
* Maximum number of ports registered at one time.
*/
#define CTL_MAX_PORTS 32
/*
* Maximum number of initiators we support.
*/
#define CTL_MAX_INITIATORS (CTL_MAX_INIT_PER_PORT * CTL_MAX_PORTS)
/* Hopefully this won't conflict with new misc devices that pop up */
#define CTL_MINOR 225
typedef enum {
CTL_OOA_INVALID_LUN,
CTL_OOA_SUCCESS
} ctl_ooa_status;
struct ctl_ooa_info {
uint32_t target_id; /* Passed in to CTL */
uint32_t lun_id; /* Passed in to CTL */
uint32_t num_entries; /* Returned from CTL */
ctl_ooa_status status; /* Returned from CTL */
};
struct ctl_hard_startstop_info {
cfi_mt_status status;
int total_luns;
int luns_complete;
int luns_failed;
};
struct ctl_bbrread_info {
int lun_num; /* Passed in to CTL */
uint64_t lba; /* Passed in to CTL */
int len; /* Passed in to CTL */
cfi_mt_status status; /* Returned from CTL */
cfi_bbrread_status bbr_status; /* Returned from CTL */
uint8_t scsi_status; /* Returned from CTL */
struct scsi_sense_data sense_data; /* Returned from CTL */
};
typedef enum {
CTL_DELAY_TYPE_NONE,
CTL_DELAY_TYPE_CONT,
CTL_DELAY_TYPE_ONESHOT
} ctl_delay_type;
typedef enum {
CTL_DELAY_LOC_NONE,
CTL_DELAY_LOC_DATAMOVE,
CTL_DELAY_LOC_DONE,
} ctl_delay_location;
typedef enum {
CTL_DELAY_STATUS_NONE,
CTL_DELAY_STATUS_OK,
CTL_DELAY_STATUS_INVALID_LUN,
CTL_DELAY_STATUS_INVALID_TYPE,
CTL_DELAY_STATUS_INVALID_LOC,
CTL_DELAY_STATUS_NOT_IMPLEMENTED
} ctl_delay_status;
struct ctl_io_delay_info {
uint32_t target_id;
uint32_t lun_id;
ctl_delay_type delay_type;
ctl_delay_location delay_loc;
uint32_t delay_secs;
ctl_delay_status status;
};
typedef enum {
CTL_GS_SYNC_NONE,
CTL_GS_SYNC_OK,
CTL_GS_SYNC_NO_LUN
} ctl_gs_sync_status;
/*
* The target and LUN id specify which device to modify. The sync interval
* means that we will let through every N SYNCHRONIZE CACHE commands.
*/
struct ctl_sync_info {
uint32_t target_id; /* passed to kernel */
uint32_t lun_id; /* passed to kernel */
int sync_interval; /* depends on whether get/set */
ctl_gs_sync_status status; /* passed from kernel */
};
typedef enum {
CTL_STATS_NO_IO,
CTL_STATS_READ,
CTL_STATS_WRITE
} ctl_stat_types;
#define CTL_STATS_NUM_TYPES 3
typedef enum {
CTL_LUN_STATS_NO_BLOCKSIZE = 0x01
} ctl_lun_stats_flags;
struct ctl_lun_io_port_stats {
uint32_t targ_port;
uint64_t bytes[CTL_STATS_NUM_TYPES];
uint64_t operations[CTL_STATS_NUM_TYPES];
struct bintime time[CTL_STATS_NUM_TYPES];
uint64_t num_dmas[CTL_STATS_NUM_TYPES];
struct bintime dma_time[CTL_STATS_NUM_TYPES];
};
struct ctl_lun_io_stats {
uint8_t device_type;
uint64_t lun_number;
uint32_t blocksize;
ctl_lun_stats_flags flags;
struct ctl_lun_io_port_stats ports[CTL_MAX_PORTS];
};
typedef enum {
CTL_SS_OK,
CTL_SS_NEED_MORE_SPACE,
CTL_SS_ERROR
} ctl_stats_status;
typedef enum {
CTL_STATS_FLAG_NONE = 0x00,
CTL_STATS_FLAG_TIME_VALID = 0x01
} ctl_stats_flags;
struct ctl_stats {
int alloc_len; /* passed to kernel */
struct ctl_lun_io_stats *lun_stats; /* passed to/from kernel */
int fill_len; /* passed to userland */
int num_luns; /* passed to userland */
ctl_stats_status status; /* passed to userland */
ctl_stats_flags flags; /* passed to userland */
struct timespec timestamp; /* passed to userland */
};
/*
* The types of errors that can be injected:
*
* NONE: No error specified.
* ABORTED: SSD_KEY_ABORTED_COMMAND, 0x45, 0x00
* MEDIUM_ERR: Medium error, different asc/ascq depending on read/write.
* UA: Unit attention.
* CUSTOM: User specifies the sense data.
* TYPE: Mask to use with error types.
*
* Flags that affect injection behavior:
* CONTINUOUS: This error will stay around until explicitly cleared.
* DESCRIPTOR: Use descriptor sense instead of fixed sense.
*/
typedef enum {
CTL_LUN_INJ_NONE = 0x000,
CTL_LUN_INJ_ABORTED = 0x001,
CTL_LUN_INJ_MEDIUM_ERR = 0x002,
CTL_LUN_INJ_UA = 0x003,
CTL_LUN_INJ_CUSTOM = 0x004,
CTL_LUN_INJ_TYPE = 0x0ff,
CTL_LUN_INJ_CONTINUOUS = 0x100,
CTL_LUN_INJ_DESCRIPTOR = 0x200
} ctl_lun_error;
/*
* Flags to specify what type of command the given error pattern will
* execute on. The first group of types can be ORed together.
*
* READ: Any read command.
* WRITE: Any write command.
* READWRITE: Any read or write command.
* READCAP: Any read capacity command.
* TUR: Test Unit Ready.
* ANY: Any command.
* MASK: Mask for basic command patterns.
*
* Special types:
*
* CMD: The CDB to act on is specified in struct ctl_error_desc_cmd.
* RANGE: For read/write commands, act when the LBA is in the
* specified range.
*/
typedef enum {
CTL_LUN_PAT_NONE = 0x000,
CTL_LUN_PAT_READ = 0x001,
CTL_LUN_PAT_WRITE = 0x002,
CTL_LUN_PAT_READWRITE = CTL_LUN_PAT_READ | CTL_LUN_PAT_WRITE,
CTL_LUN_PAT_READCAP = 0x004,
CTL_LUN_PAT_TUR = 0x008,
CTL_LUN_PAT_ANY = 0x0ff,
CTL_LUN_PAT_MASK = 0x0ff,
CTL_LUN_PAT_CMD = 0x100,
CTL_LUN_PAT_RANGE = 0x200
} ctl_lun_error_pattern;
/*
* This structure allows the user to specify a particular CDB pattern to
* look for.
*
* cdb_pattern: Fill in the relevant bytes to look for in the CDB.
* cdb_valid_bytes: Bitmask specifying valid bytes in the cdb_pattern.
* flags: Specify any command flags (see ctl_io_flags) that
* should be set.
*/
struct ctl_error_desc_cmd {
uint8_t cdb_pattern[CTL_MAX_CDBLEN];
uint32_t cdb_valid_bytes;
uint32_t flags;
};
/*
* Error injection descriptor.
*
* target_id: Target ID to act on.
* lun_id LUN to act on.
* lun_error: The type of error to inject. See above for descriptions.
* error_pattern: What kind of command to act on. See above.
* cmd_desc: For CTL_LUN_PAT_CMD only.
* lba_range: For CTL_LUN_PAT_RANGE only.
* custom_sense: Specify sense. For CTL_LUN_INJ_CUSTOM only.
* serial: Serial number returned by the kernel. Use for deletion.
* links: Kernel use only.
*/
struct ctl_error_desc {
uint32_t target_id; /* To kernel */
uint32_t lun_id; /* To kernel */
ctl_lun_error lun_error; /* To kernel */
ctl_lun_error_pattern error_pattern; /* To kernel */
struct ctl_error_desc_cmd cmd_desc; /* To kernel */
struct ctl_lba_len lba_range; /* To kernel */
struct scsi_sense_data custom_sense; /* To kernel */
uint64_t serial; /* From kernel */
STAILQ_ENTRY(ctl_error_desc) links; /* Kernel use only */
};
typedef enum {
CTL_OOA_FLAG_NONE = 0x00,
CTL_OOA_FLAG_ALL_LUNS = 0x01
} ctl_ooa_flags;
typedef enum {
CTL_OOA_OK,
CTL_OOA_NEED_MORE_SPACE,
CTL_OOA_ERROR
} ctl_get_ooa_status;
typedef enum {
CTL_OOACMD_FLAG_NONE = 0x00,
CTL_OOACMD_FLAG_DMA = 0x01,
CTL_OOACMD_FLAG_BLOCKED = 0x02,
CTL_OOACMD_FLAG_ABORT = 0x04,
CTL_OOACMD_FLAG_RTR = 0x08,
CTL_OOACMD_FLAG_DMA_QUEUED = 0x10
} ctl_ooa_cmd_flags;
struct ctl_ooa_entry {
ctl_ooa_cmd_flags cmd_flags;
uint8_t cdb[CTL_MAX_CDBLEN];
uint8_t cdb_len;
uint32_t tag_num;
uint32_t lun_num;
struct bintime start_bt;
};
struct ctl_ooa {
ctl_ooa_flags flags; /* passed to kernel */
uint64_t lun_num; /* passed to kernel */
uint32_t alloc_len; /* passed to kernel */
uint32_t alloc_num; /* passed to kernel */
struct ctl_ooa_entry *entries; /* filled in kernel */
uint32_t fill_len; /* passed to userland */
uint32_t fill_num; /* passed to userland */
uint32_t dropped_num; /* passed to userland */
struct bintime cur_bt; /* passed to userland */
ctl_get_ooa_status status; /* passed to userland */
};
typedef enum {
CTL_PORT_LIST_NONE,
CTL_PORT_LIST_OK,
CTL_PORT_LIST_NEED_MORE_SPACE,
CTL_PORT_LIST_ERROR
} ctl_port_list_status;
struct ctl_port_list {
uint32_t alloc_len; /* passed to kernel */
uint32_t alloc_num; /* passed to kernel */
struct ctl_port_entry *entries; /* filled in kernel */
uint32_t fill_len; /* passed to userland */
uint32_t fill_num; /* passed to userland */
uint32_t dropped_num; /* passed to userland */
ctl_port_list_status status; /* passed to userland */
};
typedef enum {
CTL_LUN_NOSTATUS,
CTL_LUN_OK,
CTL_LUN_ERROR
} ctl_lun_status;
#define CTL_ERROR_STR_LEN 160
#define CTL_BEARG_RD 0x01
#define CTL_BEARG_WR 0x02
#define CTL_BEARG_RW (CTL_BEARG_RD|CTL_BEARG_WR)
#define CTL_BEARG_ASCII 0x04
/*
* Backend Argument:
*
* namelen: Length of the name field, including the terminating NUL.
*
* name: Name of the paramter. This must be NUL-terminated.
*
* flags: Flags for the parameter, see above for values.
*
* vallen: Length of the value in bytes.
*
* value: Value to be set/fetched.
*
* kname: For kernel use only.
*
* kvalue: For kernel use only.
*/
struct ctl_be_arg {
int namelen;
char *name;
int flags;
int vallen;
void *value;
char *kname;
void *kvalue;
};
typedef enum {
CTL_LUNREQ_CREATE,
CTL_LUNREQ_RM,
CTL_LUNREQ_MODIFY,
} ctl_lunreq_type;
/*
* LUN creation parameters:
*
* flags: Various LUN flags, see ctl_backend.h for a
* description of the flag values and meanings.
*
* device_type: The SCSI device type. e.g. 0 for Direct Access,
* 3 for Processor, etc. Only certain backends may
* support setting this field. The CTL_LUN_FLAG_DEV_TYPE
* flag should be set in the flags field if the device
* type is set.
*
* lun_size_bytes: The size of the LUN in bytes. For some backends
* this is relevant (e.g. ramdisk), for others, it may
* be ignored in favor of using the properties of the
* backing store. If specified, this should be a
* multiple of the blocksize.
*
* The actual size of the LUN is returned in this
* field.
*
* blocksize_bytes: The LUN blocksize in bytes. For some backends this
* is relevant, for others it may be ignored in
* favor of using the properties of the backing store.
*
* The actual blocksize of the LUN is returned in this
* field.
*
* req_lun_id: The requested LUN ID. The CTL_LUN_FLAG_ID_REQ flag
* should be set if this is set. The request will be
* granted if the LUN number is available, otherwise
* the LUN addition request will fail.
*
* The allocated LUN number is returned in this field.
*
* serial_num: This is the value returned in SCSI INQUIRY VPD page
* 0x80. If it is specified, the CTL_LUN_FLAG_SERIAL_NUM
* flag should be set.
*
* The serial number value used is returned in this
* field.
*
* device_id: This is the value returned in the T10 vendor ID
* based DESIGNATOR field in the SCSI INQUIRY VPD page
* 0x83 data. If it is specified, the CTL_LUN_FLAG_DEVID
* flag should be set.
*
* The device id value used is returned in this field.
*/
struct ctl_lun_create_params {
ctl_backend_lun_flags flags;
uint8_t device_type;
uint64_t lun_size_bytes;
uint32_t blocksize_bytes;
uint32_t req_lun_id;
uint8_t serial_num[CTL_SN_LEN];
uint8_t device_id[CTL_DEVID_LEN];
};
/*
* LUN removal parameters:
*
* lun_id: The number of the LUN to delete. This must be set.
* The LUN must be backed by the given backend.
*/
struct ctl_lun_rm_params {
uint32_t lun_id;
};
/*
* LUN modification parameters:
*
* lun_id: The number of the LUN to modify. This must be set.
* The LUN must be backed by the given backend.
*
* lun_size_bytes: The size of the LUN in bytes. If zero, update
* the size using the backing file size, if possible.
*/
struct ctl_lun_modify_params {
uint32_t lun_id;
uint64_t lun_size_bytes;
};
/*
* Union of request type data. Fill in the appropriate union member for
* the request type.
*/
union ctl_lunreq_data {
struct ctl_lun_create_params create;
struct ctl_lun_rm_params rm;
struct ctl_lun_modify_params modify;
};
/*
* LUN request interface:
*
* backend: This is required, and is NUL-terminated a string
* that is the name of the backend, like "ramdisk" or
* "block".
*
* reqtype: The type of request, CTL_LUNREQ_CREATE to create a
* LUN, CTL_LUNREQ_RM to delete a LUN.
*
* reqdata: Request type-specific information. See the
* description of individual the union members above
* for more information.
*
* num_be_args: This is the number of backend-specific arguments
* in the be_args array.
*
* be_args: This is an array of backend-specific arguments.
* See above for a description of the fields in this
* structure.
*
* status: Status of the LUN request.
*
* error_str: If the status is CTL_LUN_ERROR, this will
* contain a string describing the error.
*
* kern_be_args: For kernel use only.
*/
struct ctl_lun_req {
char backend[CTL_BE_NAME_LEN];
ctl_lunreq_type reqtype;
union ctl_lunreq_data reqdata;
int num_be_args;
struct ctl_be_arg *be_args;
ctl_lun_status status;
char error_str[CTL_ERROR_STR_LEN];
struct ctl_be_arg *kern_be_args;
};
/*
* LUN list status:
*
* NONE: No status.
*
* OK: Request completed successfully.
*
* NEED_MORE_SPACE: The allocated length of the entries field is too
* small for the available data.
*
* ERROR: An error occured, look at the error string for a
* description of the error.
*/
typedef enum {
CTL_LUN_LIST_NONE,
CTL_LUN_LIST_OK,
CTL_LUN_LIST_NEED_MORE_SPACE,
CTL_LUN_LIST_ERROR
} ctl_lun_list_status;
/*
* LUN list interface
*
* backend_name: This is a NUL-terminated string. If the string
* length is 0, then all LUNs on all backends will
* be enumerated. Otherwise this is the name of the
* backend to be enumerated, like "ramdisk" or "block".
*
* alloc_len: The length of the data buffer allocated for entries.
* In order to properly size the buffer, make one call
* with alloc_len set to 0, and then use the returned
* dropped_len as the buffer length to allocate and
* pass in on a subsequent call.
*
* lun_xml: XML-formatted information on the requested LUNs.
*
* fill_len: The amount of data filled in the storage for entries.
*
* status: The status of the request. See above for the
* description of the values of this field.
*
* error_str: If the status indicates an error, this string will
* be filled in to describe the error.
*/
struct ctl_lun_list {
char backend[CTL_BE_NAME_LEN]; /* passed to kernel*/
uint32_t alloc_len; /* passed to kernel */
char *lun_xml; /* filled in kernel */
uint32_t fill_len; /* passed to userland */
ctl_lun_list_status status; /* passed to userland */
char error_str[CTL_ERROR_STR_LEN];
/* passed to userland */
};
#define CTL_IO _IOWR(CTL_MINOR, 0x00, union ctl_io)
#define CTL_ENABLE_PORT _IOW(CTL_MINOR, 0x04, struct ctl_port_entry)
#define CTL_DISABLE_PORT _IOW(CTL_MINOR, 0x05, struct ctl_port_entry)
#define CTL_DUMP_OOA _IO(CTL_MINOR, 0x06)
#define CTL_CHECK_OOA _IOWR(CTL_MINOR, 0x07, struct ctl_ooa_info)
#define CTL_HARD_STOP _IOR(CTL_MINOR, 0x08, \
struct ctl_hard_startstop_info)
#define CTL_HARD_START _IOR(CTL_MINOR, 0x09, \
struct ctl_hard_startstop_info)
#define CTL_DELAY_IO _IOWR(CTL_MINOR, 0x10, struct ctl_io_delay_info)
#define CTL_REALSYNC_GET _IOR(CTL_MINOR, 0x11, int)
#define CTL_REALSYNC_SET _IOW(CTL_MINOR, 0x12, int)
#define CTL_SETSYNC _IOWR(CTL_MINOR, 0x13, struct ctl_sync_info)
#define CTL_GETSYNC _IOWR(CTL_MINOR, 0x14, struct ctl_sync_info)
#define CTL_GETSTATS _IOWR(CTL_MINOR, 0x15, struct ctl_stats)
#define CTL_ERROR_INJECT _IOWR(CTL_MINOR, 0x16, struct ctl_error_desc)
#define CTL_BBRREAD _IOWR(CTL_MINOR, 0x17, struct ctl_bbrread_info)
#define CTL_GET_OOA _IOWR(CTL_MINOR, 0x18, struct ctl_ooa)
#define CTL_DUMP_STRUCTS _IO(CTL_MINOR, 0x19)
#define CTL_GET_PORT_LIST _IOWR(CTL_MINOR, 0x20, struct ctl_port_list)
#define CTL_LUN_REQ _IOWR(CTL_MINOR, 0x21, struct ctl_lun_req)
#define CTL_LUN_LIST _IOWR(CTL_MINOR, 0x22, struct ctl_lun_list)
#define CTL_ERROR_INJECT_DELETE _IOW(CTL_MINOR, 0x23, struct ctl_error_desc)
#define CTL_SET_PORT_WWNS _IOW(CTL_MINOR, 0x24, struct ctl_port_entry)
#endif /* _CTL_IOCTL_H_ */
/*
* vim: ts=8
*/
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