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freebsd-skq/sys/cam/ctl/ctl_private.h
Kenneth D. Merry bf8f8f340e Change the SCSI INQUIRY peripheral qualifier that CTL reports for LUNs 
that don't exist.

Anecdotal evidence indicates that it is better to return 011b (bad LUN)
than 001b (LUN offline).  However, this change also gives the user a
sysctl/tunable, kern.cam.ctl.inquiry_pq_no_lun, to override the change
and return to the previous behavior.  (The previous behavior was to
return 001b, or LUN offline.)

ctl.c:		Change the default inquiry peripheral qualifier to 011b,
		and add a sysctl and tunable to allow the user to change
		it back to 001b if needed.

		Don't insert a Copan copyright statement in the inquiry
		data.  The copyright statements on the files are
		sufficient.

ctl_private.h:	Add sysctl variable context to the CTL softc.

ctl_cmd_table.c,
ctl_frontend_internal.c,
ctl_frontend.c,
ctl_backend.c,
ctl_error.c:	Include sys/sysctl.h.

MFC after:	3 days
2012-04-06 22:23:13 +00:00

497 lines
14 KiB
C
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/*-
* Copyright (c) 2003, 2004, 2005, 2008 Silicon Graphics International Corp.
* 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_private.h#7 $
* $FreeBSD$
*/
/*
* CAM Target Layer driver private data structures/definitions.
*
* Author: Ken Merry <ken@FreeBSD.org>
*/
#ifndef _CTL_PRIVATE_H_
#define _CTL_PRIVATE_H_
/*
* SCSI vendor and product names.
*/
#define CTL_VENDOR "FREEBSD "
#define CTL_DIRECT_PRODUCT "CTLDISK "
#define CTL_PROCESSOR_PRODUCT "CTLPROCESSOR "
#define CTL_UNKNOWN_PRODUCT "CTLDEVICE "
struct ctl_fe_ioctl_startstop_info {
struct cv sem;
struct ctl_hard_startstop_info hs_info;
};
struct ctl_fe_ioctl_bbrread_info {
struct cv sem;
struct ctl_bbrread_info *bbr_info;
int wakeup_done;
struct mtx *lock;
};
typedef enum {
CTL_IOCTL_INPROG,
CTL_IOCTL_DATAMOVE,
CTL_IOCTL_DONE
} ctl_fe_ioctl_state;
struct ctl_fe_ioctl_params {
struct cv sem;
struct mtx ioctl_mtx;
ctl_fe_ioctl_state state;
};
#define CTL_POOL_ENTRIES_INTERNAL 200
#define CTL_POOL_ENTRIES_EMERGENCY 300
#define CTL_POOL_ENTRIES_OTHER_SC 200
typedef enum {
CTL_POOL_INTERNAL,
CTL_POOL_FETD,
CTL_POOL_EMERGENCY,
CTL_POOL_IOCTL,
CTL_POOL_4OTHERSC
} ctl_pool_type;
typedef enum {
CTL_POOL_FLAG_NONE = 0x00,
CTL_POOL_FLAG_INVALID = 0x01
} ctl_pool_flags;
struct ctl_io_pool {
ctl_pool_type type;
ctl_pool_flags flags;
uint32_t id;
struct ctl_softc *ctl_softc;
uint32_t refcount;
uint64_t total_allocated;
uint64_t total_freed;
int32_t total_ctl_io;
int32_t free_ctl_io;
STAILQ_HEAD(, ctl_io_hdr) free_queue;
STAILQ_ENTRY(ctl_io_pool) links;
};
typedef enum {
CTL_IOCTL_FLAG_NONE = 0x00,
CTL_IOCTL_FLAG_ENABLED = 0x01
} ctl_ioctl_flags;
struct ctl_ioctl_info {
ctl_ioctl_flags flags;
uint32_t cur_tag_num;
struct ctl_frontend fe;
char port_name[24];
};
typedef enum {
CTL_SER_BLOCK,
CTL_SER_EXTENT,
CTL_SER_PASS,
CTL_SER_SKIP
} ctl_serialize_action;
typedef enum {
CTL_ACTION_BLOCK,
CTL_ACTION_OVERLAP,
CTL_ACTION_OVERLAP_TAG,
CTL_ACTION_PASS,
CTL_ACTION_SKIP,
CTL_ACTION_ERROR
} ctl_action;
/*
* WARNING: Keep the bottom nibble here free, we OR in the data direction
* flags for each command.
*
* Note: "OK_ON_ALL_LUNS" == we don't have to have a lun configured
* "OK_ON_BOTH" == we have to have a lun configured
*/
typedef enum {
CTL_CMD_FLAG_NONE = 0x0000,
CTL_CMD_FLAG_NO_SENSE = 0x0010,
CTL_CMD_FLAG_OK_ON_ALL_LUNS = 0x0020,
CTL_CMD_FLAG_ALLOW_ON_RESV = 0x0040,
CTL_CMD_FLAG_OK_ON_PROC = 0x0100,
CTL_CMD_FLAG_OK_ON_SLUN = 0x0200,
CTL_CMD_FLAG_OK_ON_BOTH = 0x0300,
CTL_CMD_FLAG_OK_ON_STOPPED = 0x0400,
CTL_CMD_FLAG_OK_ON_INOPERABLE = 0x0800,
CTL_CMD_FLAG_OK_ON_OFFLINE = 0x1000,
CTL_CMD_FLAG_OK_ON_SECONDARY = 0x2000,
CTL_CMD_FLAG_ALLOW_ON_PR_RESV = 0x4000
} ctl_cmd_flags;
typedef enum {
CTL_SERIDX_TUR = 0,
CTL_SERIDX_READ,
CTL_SERIDX_WRITE,
CTL_SERIDX_MD_SNS,
CTL_SERIDX_MD_SEL,
CTL_SERIDX_RQ_SNS,
CTL_SERIDX_INQ,
CTL_SERIDX_RD_CAP,
CTL_SERIDX_RESV,
CTL_SERIDX_REL,
CTL_SERIDX_LOG_SNS,
CTL_SERIDX_FORMAT,
CTL_SERIDX_START,
CTL_SERIDX_PRES_IN,
CTL_SERIDX_PRES_OUT,
CTL_SERIDX_MAIN_IN,
/* TBD: others to be filled in as needed */
CTL_SERIDX_COUNT, /* LAST, not a normal code, provides # codes */
CTL_SERIDX_INVLD = CTL_SERIDX_COUNT
} ctl_seridx;
typedef int ctl_opfunc(struct ctl_scsiio *ctsio);
struct ctl_cmd_entry {
ctl_opfunc *execute;
ctl_seridx seridx;
ctl_cmd_flags flags;
ctl_lun_error_pattern pattern;
};
typedef enum {
CTL_LUN_NONE = 0x000,
CTL_LUN_CONTROL = 0x001,
CTL_LUN_RESERVED = 0x002,
CTL_LUN_INVALID = 0x004,
CTL_LUN_DISABLED = 0x008,
CTL_LUN_MALLOCED = 0x010,
CTL_LUN_STOPPED = 0x020,
CTL_LUN_INOPERABLE = 0x040,
CTL_LUN_OFFLINE = 0x080,
CTL_LUN_PR_RESERVED = 0x100,
CTL_LUN_PRIMARY_SC = 0x200,
CTL_LUN_SENSE_DESC = 0x400
} ctl_lun_flags;
typedef enum {
CTLBLOCK_FLAG_NONE = 0x00,
CTLBLOCK_FLAG_INVALID = 0x01
} ctlblock_flags;
union ctl_softcs {
struct ctl_softc *ctl_softc;
struct ctlblock_softc *ctlblock_softc;
};
/*
* Mode page defaults.
*/
#if 0
/*
* These values make Solaris trim off some of the capacity.
*/
#define CTL_DEFAULT_SECTORS_PER_TRACK 63
#define CTL_DEFAULT_HEADS 255
/*
* These values seem to work okay.
*/
#define CTL_DEFAULT_SECTORS_PER_TRACK 63
#define CTL_DEFAULT_HEADS 16
/*
* These values work reasonably well.
*/
#define CTL_DEFAULT_SECTORS_PER_TRACK 512
#define CTL_DEFAULT_HEADS 64
#endif
/*
* Solaris is somewhat picky about how many heads and sectors per track you
* have defined in mode pages 3 and 4. These values seem to cause Solaris
* to get the capacity more or less right when you run the format tool.
* They still have problems when dealing with devices larger than 1TB,
* but there isn't anything we can do about that.
*
* For smaller LUN sizes, this ends up causing the number of cylinders to
* work out to 0. Solaris actually recognizes that and comes up with its
* own bogus geometry to fit the actual capacity of the drive. They really
* should just give up on geometry and stick to the read capacity
* information alone for modern disk drives.
*
* One thing worth mentioning about Solaris' mkfs command is that it
* doesn't like sectors per track values larger than 256. 512 seems to
* work okay for format, but causes problems when you try to make a
* filesystem.
*
* Another caveat about these values: the product of these two values
* really should be a power of 2. This is because of the simplistic
* shift-based calculation that we have to use on the i386 platform to
* calculate the number of cylinders here. (If you use a divide, you end
* up calling __udivdi3(), which is a hardware FP call on the PC. On the
* XScale, it is done in software, so you can do that from inside the
* kernel.)
*
* So for the current values (256 S/T, 128 H), we get 32768, which works
* very nicely for calculating cylinders.
*
* If you want to change these values so that their product is no longer a
* power of 2, re-visit the calculation in ctl_init_page_index(). You may
* need to make it a bit more complicated to get the number of cylinders
* right.
*/
#define CTL_DEFAULT_SECTORS_PER_TRACK 256
#define CTL_DEFAULT_HEADS 128
#define CTL_DEFAULT_ROTATION_RATE 10000
struct ctl_page_index;
typedef int ctl_modesen_handler(struct ctl_scsiio *ctsio,
struct ctl_page_index *page_index,
int pc);
typedef int ctl_modesel_handler(struct ctl_scsiio *ctsio,
struct ctl_page_index *page_index,
uint8_t *page_ptr);
typedef enum {
CTL_PAGE_FLAG_NONE = 0x00,
CTL_PAGE_FLAG_DISK_ONLY = 0x01
} ctl_page_flags;
struct ctl_page_index {
uint8_t page_code;
uint8_t subpage;
uint16_t page_len;
uint8_t *page_data;
ctl_page_flags page_flags;
ctl_modesen_handler *sense_handler;
ctl_modesel_handler *select_handler;
};
#define CTL_PAGE_CURRENT 0x00
#define CTL_PAGE_CHANGEABLE 0x01
#define CTL_PAGE_DEFAULT 0x02
#define CTL_PAGE_SAVED 0x03
static const struct ctl_page_index page_index_template[] = {
{SMS_FORMAT_DEVICE_PAGE, 0, sizeof(struct scsi_format_page), NULL,
CTL_PAGE_FLAG_DISK_ONLY, NULL, NULL},
{SMS_RIGID_DISK_PAGE, 0, sizeof(struct scsi_rigid_disk_page), NULL,
CTL_PAGE_FLAG_DISK_ONLY, NULL, NULL},
{SMS_CACHING_PAGE, 0, sizeof(struct scsi_caching_page), NULL,
CTL_PAGE_FLAG_DISK_ONLY, NULL, NULL},
{SMS_CONTROL_MODE_PAGE, 0, sizeof(struct scsi_control_page), NULL,
CTL_PAGE_FLAG_NONE, NULL, ctl_control_page_handler},
{SMS_VENDOR_SPECIFIC_PAGE | SMPH_SPF, PWR_SUBPAGE_CODE,
sizeof(struct copan_power_subpage), NULL, CTL_PAGE_FLAG_NONE,
ctl_power_sp_sense_handler, ctl_power_sp_handler},
{SMS_VENDOR_SPECIFIC_PAGE | SMPH_SPF, APS_SUBPAGE_CODE,
sizeof(struct copan_aps_subpage), NULL, CTL_PAGE_FLAG_NONE,
NULL, ctl_aps_sp_handler},
{SMS_VENDOR_SPECIFIC_PAGE | SMPH_SPF, DBGCNF_SUBPAGE_CODE,
sizeof(struct copan_debugconf_subpage), NULL, CTL_PAGE_FLAG_NONE,
ctl_debugconf_sp_sense_handler, ctl_debugconf_sp_select_handler},
};
#define CTL_NUM_MODE_PAGES sizeof(page_index_template)/ \
sizeof(page_index_template[0])
struct ctl_mode_pages {
struct scsi_format_page format_page[4];
struct scsi_rigid_disk_page rigid_disk_page[4];
struct scsi_caching_page caching_page[4];
struct scsi_control_page control_page[4];
struct copan_power_subpage power_subpage[4];
struct copan_aps_subpage aps_subpage[4];
struct copan_debugconf_subpage debugconf_subpage[4];
struct ctl_page_index index[CTL_NUM_MODE_PAGES];
};
struct ctl_pending_sense {
ctl_ua_type ua_pending;
struct scsi_sense_data sense;
};
struct ctl_lun_delay_info {
ctl_delay_type datamove_type;
uint32_t datamove_delay;
ctl_delay_type done_type;
uint32_t done_delay;
};
typedef enum {
CTL_ERR_INJ_NONE = 0x00,
CTL_ERR_INJ_ABORTED = 0x01
} ctl_err_inject_flags;
typedef enum {
CTL_PR_FLAG_NONE = 0x00,
CTL_PR_FLAG_REGISTERED = 0x01,
CTL_PR_FLAG_ACTIVE_RES = 0x02
} ctl_per_res_flags;
struct ctl_per_res_info {
struct scsi_per_res_key res_key;
uint8_t registered;
};
#define CTL_PR_ALL_REGISTRANTS 0xFFFF
#define CTL_PR_NO_RESERVATION 0xFFF0
/*
* For report target port groups.
*/
#define NUM_TARGET_PORT_GROUPS 2
#define NUM_PORTS_PER_GRP 2
struct ctl_lun {
struct mtx lun_lock;
struct ctl_id target;
uint64_t lun;
ctl_lun_flags flags;
STAILQ_HEAD(,ctl_error_desc) error_list;
uint64_t error_serial;
struct ctl_softc *ctl_softc;
struct ctl_be_lun *be_lun;
struct ctl_backend_driver *backend;
int io_count;
struct ctl_lun_delay_info delay_info;
int sync_interval;
int sync_count;
TAILQ_HEAD(ctl_ooaq, ctl_io_hdr) ooa_queue;
TAILQ_HEAD(ctl_blockq,ctl_io_hdr) blocked_queue;
STAILQ_ENTRY(ctl_lun) links;
STAILQ_ENTRY(ctl_lun) run_links;
struct ctl_nexus rsv_nexus;
uint32_t have_ca[CTL_MAX_INITIATORS >> 5];
struct ctl_pending_sense pending_sense[CTL_MAX_INITIATORS];
struct ctl_mode_pages mode_pages;
struct ctl_lun_io_stats stats;
struct ctl_per_res_info per_res[2*CTL_MAX_INITIATORS];
unsigned int PRGeneration;
int pr_key_count;
uint16_t pr_res_idx;
uint8_t res_type;
uint8_t write_buffer[524288];
};
typedef enum {
CTL_FLAG_TASK_PENDING = 0x01,
CTL_FLAG_REAL_SYNC = 0x02,
CTL_FLAG_MASTER_SHELF = 0x04
} ctl_gen_flags;
struct ctl_wwpn_iid {
int in_use;
uint64_t wwpn;
uint32_t iid;
int32_t port;
};
struct ctl_softc {
struct mtx ctl_lock;
struct cdev *dev;
int open_count;
struct ctl_id target;
int num_disks;
int num_luns;
ctl_gen_flags flags;
ctl_ha_mode ha_mode;
int inquiry_pq_no_lun;
struct sysctl_ctx_list sysctl_ctx;
struct sysctl_oid *sysctl_tree;
struct ctl_ioctl_info ioctl_info;
struct ctl_lun lun;
struct ctl_io_pool *internal_pool;
struct ctl_io_pool *emergency_pool;
struct ctl_io_pool *othersc_pool;
struct proc *work_thread;
int targ_online;
uint32_t ctl_lun_mask[CTL_MAX_LUNS >> 5];
struct ctl_lun *ctl_luns[CTL_MAX_LUNS];
struct ctl_wwpn_iid wwpn_iid[CTL_MAX_PORTS][CTL_MAX_INIT_PER_PORT];
uint32_t ctl_port_mask;
uint64_t aps_locked_lun;
STAILQ_HEAD(, ctl_lun) lun_list;
STAILQ_HEAD(, ctl_be_lun) pending_lun_queue;
STAILQ_HEAD(, ctl_io_hdr) task_queue;
STAILQ_HEAD(, ctl_io_hdr) incoming_queue;
STAILQ_HEAD(, ctl_io_hdr) rtr_queue;
STAILQ_HEAD(, ctl_io_hdr) done_queue;
STAILQ_HEAD(, ctl_io_hdr) isc_queue;
uint32_t num_frontends;
STAILQ_HEAD(, ctl_frontend) fe_list;
struct ctl_frontend *ctl_ports[CTL_MAX_PORTS];
uint32_t num_backends;
STAILQ_HEAD(, ctl_backend_driver) be_list;
uint32_t num_pools;
uint32_t cur_pool_id;
STAILQ_HEAD(, ctl_io_pool) io_pools;
time_t last_print_jiffies;
uint32_t skipped_prints;
};
#ifdef _KERNEL
extern struct ctl_cmd_entry ctl_cmd_table[];
uint32_t ctl_get_initindex(struct ctl_nexus *nexus);
int ctl_pool_create(struct ctl_softc *ctl_softc, ctl_pool_type pool_type,
uint32_t total_ctl_io, struct ctl_io_pool **npool);
int ctl_pool_acquire(struct ctl_io_pool *pool);
int ctl_pool_invalidate(struct ctl_io_pool *pool);
int ctl_pool_release(struct ctl_io_pool *pool);
void ctl_pool_free(struct ctl_softc *ctl_softc, struct ctl_io_pool *pool);
int ctl_scsi_release(struct ctl_scsiio *ctsio);
int ctl_scsi_reserve(struct ctl_scsiio *ctsio);
int ctl_start_stop(struct ctl_scsiio *ctsio);
int ctl_sync_cache(struct ctl_scsiio *ctsio);
int ctl_format(struct ctl_scsiio *ctsio);
int ctl_write_buffer(struct ctl_scsiio *ctsio);
int ctl_mode_select(struct ctl_scsiio *ctsio);
int ctl_mode_sense(struct ctl_scsiio *ctsio);
int ctl_read_capacity(struct ctl_scsiio *ctsio);
int ctl_service_action_in(struct ctl_scsiio *ctsio);
int ctl_read_write(struct ctl_scsiio *ctsio);
int ctl_report_luns(struct ctl_scsiio *ctsio);
int ctl_request_sense(struct ctl_scsiio *ctsio);
int ctl_tur(struct ctl_scsiio *ctsio);
int ctl_inquiry(struct ctl_scsiio *ctsio);
int ctl_persistent_reserve_in(struct ctl_scsiio *ctsio);
int ctl_persistent_reserve_out(struct ctl_scsiio *ctsio);
int ctl_maintenance_in(struct ctl_scsiio *ctsio);
void ctl_done_lock(union ctl_io *io, int have_lock);
int ctl_isc(struct ctl_scsiio *ctsio);
#endif /* _KERNEL */
#endif /* _CTL_PRIVATE_H_ */
/*
* vim: ts=8
*/
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