freebsd-dev/sys/cam/ctl/ctl.h

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Add the CAM Target Layer (CTL). CTL is a disk and processor device emulation subsystem originally written for Copan Systems under Linux starting in 2003. It has been shipping in Copan (now SGI) products since 2005. It was ported to FreeBSD in 2008, and thanks to an agreement between SGI (who acquired Copan's assets in 2010) and Spectra Logic in 2010, CTL is available under a BSD-style license. The intent behind the agreement was that Spectra would work to get CTL into the FreeBSD tree. Some CTL features: - Disk and processor device emulation. - Tagged queueing - SCSI task attribute support (ordered, head of queue, simple tags) - SCSI implicit command ordering support. (e.g. if a read follows a mode select, the read will be blocked until the mode select completes.) - Full task management support (abort, LUN reset, target reset, etc.) - Support for multiple ports - Support for multiple simultaneous initiators - Support for multiple simultaneous backing stores - Persistent reservation support - Mode sense/select support - Error injection support - High Availability support (1) - All I/O handled in-kernel, no userland context switch overhead. (1) HA Support is just an API stub, and needs much more to be fully functional. ctl.c: The core of CTL. Command handlers and processing, character driver, and HA support are here. ctl.h: Basic function declarations and data structures. ctl_backend.c, ctl_backend.h: The basic CTL backend API. ctl_backend_block.c, ctl_backend_block.h: The block and file backend. This allows for using a disk or a file as the backing store for a LUN. Multiple threads are started to do I/O to the backing device, primarily because the VFS API requires that to get any concurrency. ctl_backend_ramdisk.c: A "fake" ramdisk backend. It only allocates a small amount of memory to act as a source and sink for reads and writes from an initiator. Therefore it cannot be used for any real data, but it can be used to test for throughput. It can also be used to test initiators' support for extremely large LUNs. ctl_cmd_table.c: This is a table with all 256 possible SCSI opcodes, and command handler functions defined for supported opcodes. ctl_debug.h: Debugging support. ctl_error.c, ctl_error.h: CTL-specific wrappers around the CAM sense building functions. ctl_frontend.c, ctl_frontend.h: These files define the basic CTL frontend port API. ctl_frontend_cam_sim.c: This is a CTL frontend port that is also a CAM SIM. This frontend allows for using CTL without any target-capable hardware. So any LUNs you create in CTL are visible in CAM via this port. ctl_frontend_internal.c, ctl_frontend_internal.h: This is a frontend port written for Copan to do some system-specific tasks that required sending commands into CTL from inside the kernel. This isn't entirely relevant to FreeBSD in general, but can perhaps be repurposed. ctl_ha.h: This is a stubbed-out High Availability API. Much more is needed for full HA support. See the comments in the header and the description of what is needed in the README.ctl.txt file for more details. ctl_io.h: This defines most of the core CTL I/O structures. union ctl_io is conceptually very similar to CAM's union ccb. ctl_ioctl.h: This defines all ioctls available through the CTL character device, and the data structures needed for those ioctls. ctl_mem_pool.c, ctl_mem_pool.h: Generic memory pool implementation used by the internal frontend. ctl_private.h: Private data structres (e.g. CTL softc) and function prototypes. This also includes the SCSI vendor and product names used by CTL. ctl_scsi_all.c, ctl_scsi_all.h: CTL wrappers around CAM sense printing functions. ctl_ser_table.c: Command serialization table. This defines what happens when one type of command is followed by another type of command. ctl_util.c, ctl_util.h: CTL utility functions, primarily designed to be used from userland. See ctladm for the primary consumer of these functions. These include CDB building functions. scsi_ctl.c: CAM target peripheral driver and CTL frontend port. This is the path into CTL for commands from target-capable hardware/SIMs. README.ctl.txt: CTL code features, roadmap, to-do list. usr.sbin/Makefile: Add ctladm. ctladm/Makefile, ctladm/ctladm.8, ctladm/ctladm.c, ctladm/ctladm.h, ctladm/util.c: ctladm(8) is the CTL management utility. It fills a role similar to camcontrol(8). It allow configuring LUNs, issuing commands, injecting errors and various other control functions. usr.bin/Makefile: Add ctlstat. ctlstat/Makefile ctlstat/ctlstat.8, ctlstat/ctlstat.c: ctlstat(8) fills a role similar to iostat(8). It reports I/O statistics for CTL. sys/conf/files: Add CTL files. sys/conf/NOTES: Add device ctl. sys/cam/scsi_all.h: To conform to more recent specs, the inquiry CDB length field is now 2 bytes long. Add several mode page definitions for CTL. sys/cam/scsi_all.c: Handle the new 2 byte inquiry length. sys/dev/ciss/ciss.c, sys/dev/ata/atapi-cam.c, sys/cam/scsi/scsi_targ_bh.c, scsi_target/scsi_cmds.c, mlxcontrol/interface.c: Update for 2 byte inquiry length field. scsi_da.h: Add versions of the format and rigid disk pages that are in a more reasonable format for CTL. amd64/conf/GENERIC, i386/conf/GENERIC, ia64/conf/GENERIC, sparc64/conf/GENERIC: Add device ctl. i386/conf/PAE: The CTL frontend SIM at least does not compile cleanly on PAE. Sponsored by: Copan Systems, SGI and Spectra Logic MFC after: 1 month
2012-01-12 00:34:33 +00:00
/*-
* Copyright (c) 2003 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.h#5 $
* $FreeBSD$
*/
/*
* Function definitions used both within CTL and potentially in various CTL
* clients.
*
* Author: Ken Merry <ken@FreeBSD.org>
*/
#ifndef _CTL_H_
#define _CTL_H_
#define ctl_min(x,y) (((x) < (y)) ? (x) : (y))
#define CTL_RETVAL_COMPLETE 0
#define CTL_RETVAL_QUEUED 1
#define CTL_RETVAL_ALLOCATED 2
#define CTL_RETVAL_ERROR 3
typedef enum {
CTL_PORT_NONE = 0x00,
CTL_PORT_FC = 0x01,
CTL_PORT_SCSI = 0x02,
CTL_PORT_IOCTL = 0x04,
CTL_PORT_INTERNAL = 0x08,
CTL_PORT_ALL = 0xff,
CTL_PORT_ISC = 0x100 // FC port for inter-shelf communication
} ctl_port_type;
struct ctl_port_entry {
ctl_port_type port_type;
char port_name[64];
int32_t targ_port;
int physical_port;
int virtual_port;
u_int flags;
#define CTL_PORT_WWNN_VALID 0x01
#define CTL_PORT_WWPN_VALID 0x02
uint64_t wwnn;
uint64_t wwpn;
int online;
};
struct ctl_modepage_header {
uint8_t page_code;
uint8_t subpage;
int32_t len_used;
int32_t len_left;
};
struct ctl_modepage_aps {
struct ctl_modepage_header header;
uint8_t lock_active;
};
union ctl_modepage_info {
struct ctl_modepage_header header;
struct ctl_modepage_aps aps;
};
/*
* Serial number length, for VPD page 0x80.
*/
#define CTL_SN_LEN 16
/*
* Device ID length, for VPD page 0x83.
*/
#define CTL_DEVID_LEN 16
/*
* WWPN length, for VPD page 0x83.
*/
#define CTL_WWPN_LEN 8
/*
* Unit attention types. ASC/ASCQ values for these should be placed in
* ctl_build_ua. These are also listed in order of reporting priority.
* i.e. a poweron UA is reported first, bus reset second, etc.
*/
typedef enum {
CTL_UA_NONE = 0x0000,
CTL_UA_POWERON = 0x0001,
CTL_UA_BUS_RESET = 0x0002,
CTL_UA_TARG_RESET = 0x0004,
CTL_UA_LUN_RESET = 0x0008,
CTL_UA_LUN_CHANGE = 0x0010,
CTL_UA_MODE_CHANGE = 0x0020,
CTL_UA_LOG_CHANGE = 0x0040,
CTL_UA_LVD = 0x0080,
CTL_UA_SE = 0x0100,
CTL_UA_RES_PREEMPT = 0x0200,
CTL_UA_RES_RELEASE = 0x0400,
CTL_UA_REG_PREEMPT = 0x0800,
CTL_UA_ASYM_ACC_CHANGE = 0x1000,
CTL_UA_CAPACITY_CHANGED = 0x2000
Add the CAM Target Layer (CTL). CTL is a disk and processor device emulation subsystem originally written for Copan Systems under Linux starting in 2003. It has been shipping in Copan (now SGI) products since 2005. It was ported to FreeBSD in 2008, and thanks to an agreement between SGI (who acquired Copan's assets in 2010) and Spectra Logic in 2010, CTL is available under a BSD-style license. The intent behind the agreement was that Spectra would work to get CTL into the FreeBSD tree. Some CTL features: - Disk and processor device emulation. - Tagged queueing - SCSI task attribute support (ordered, head of queue, simple tags) - SCSI implicit command ordering support. (e.g. if a read follows a mode select, the read will be blocked until the mode select completes.) - Full task management support (abort, LUN reset, target reset, etc.) - Support for multiple ports - Support for multiple simultaneous initiators - Support for multiple simultaneous backing stores - Persistent reservation support - Mode sense/select support - Error injection support - High Availability support (1) - All I/O handled in-kernel, no userland context switch overhead. (1) HA Support is just an API stub, and needs much more to be fully functional. ctl.c: The core of CTL. Command handlers and processing, character driver, and HA support are here. ctl.h: Basic function declarations and data structures. ctl_backend.c, ctl_backend.h: The basic CTL backend API. ctl_backend_block.c, ctl_backend_block.h: The block and file backend. This allows for using a disk or a file as the backing store for a LUN. Multiple threads are started to do I/O to the backing device, primarily because the VFS API requires that to get any concurrency. ctl_backend_ramdisk.c: A "fake" ramdisk backend. It only allocates a small amount of memory to act as a source and sink for reads and writes from an initiator. Therefore it cannot be used for any real data, but it can be used to test for throughput. It can also be used to test initiators' support for extremely large LUNs. ctl_cmd_table.c: This is a table with all 256 possible SCSI opcodes, and command handler functions defined for supported opcodes. ctl_debug.h: Debugging support. ctl_error.c, ctl_error.h: CTL-specific wrappers around the CAM sense building functions. ctl_frontend.c, ctl_frontend.h: These files define the basic CTL frontend port API. ctl_frontend_cam_sim.c: This is a CTL frontend port that is also a CAM SIM. This frontend allows for using CTL without any target-capable hardware. So any LUNs you create in CTL are visible in CAM via this port. ctl_frontend_internal.c, ctl_frontend_internal.h: This is a frontend port written for Copan to do some system-specific tasks that required sending commands into CTL from inside the kernel. This isn't entirely relevant to FreeBSD in general, but can perhaps be repurposed. ctl_ha.h: This is a stubbed-out High Availability API. Much more is needed for full HA support. See the comments in the header and the description of what is needed in the README.ctl.txt file for more details. ctl_io.h: This defines most of the core CTL I/O structures. union ctl_io is conceptually very similar to CAM's union ccb. ctl_ioctl.h: This defines all ioctls available through the CTL character device, and the data structures needed for those ioctls. ctl_mem_pool.c, ctl_mem_pool.h: Generic memory pool implementation used by the internal frontend. ctl_private.h: Private data structres (e.g. CTL softc) and function prototypes. This also includes the SCSI vendor and product names used by CTL. ctl_scsi_all.c, ctl_scsi_all.h: CTL wrappers around CAM sense printing functions. ctl_ser_table.c: Command serialization table. This defines what happens when one type of command is followed by another type of command. ctl_util.c, ctl_util.h: CTL utility functions, primarily designed to be used from userland. See ctladm for the primary consumer of these functions. These include CDB building functions. scsi_ctl.c: CAM target peripheral driver and CTL frontend port. This is the path into CTL for commands from target-capable hardware/SIMs. README.ctl.txt: CTL code features, roadmap, to-do list. usr.sbin/Makefile: Add ctladm. ctladm/Makefile, ctladm/ctladm.8, ctladm/ctladm.c, ctladm/ctladm.h, ctladm/util.c: ctladm(8) is the CTL management utility. It fills a role similar to camcontrol(8). It allow configuring LUNs, issuing commands, injecting errors and various other control functions. usr.bin/Makefile: Add ctlstat. ctlstat/Makefile ctlstat/ctlstat.8, ctlstat/ctlstat.c: ctlstat(8) fills a role similar to iostat(8). It reports I/O statistics for CTL. sys/conf/files: Add CTL files. sys/conf/NOTES: Add device ctl. sys/cam/scsi_all.h: To conform to more recent specs, the inquiry CDB length field is now 2 bytes long. Add several mode page definitions for CTL. sys/cam/scsi_all.c: Handle the new 2 byte inquiry length. sys/dev/ciss/ciss.c, sys/dev/ata/atapi-cam.c, sys/cam/scsi/scsi_targ_bh.c, scsi_target/scsi_cmds.c, mlxcontrol/interface.c: Update for 2 byte inquiry length field. scsi_da.h: Add versions of the format and rigid disk pages that are in a more reasonable format for CTL. amd64/conf/GENERIC, i386/conf/GENERIC, ia64/conf/GENERIC, sparc64/conf/GENERIC: Add device ctl. i386/conf/PAE: The CTL frontend SIM at least does not compile cleanly on PAE. Sponsored by: Copan Systems, SGI and Spectra Logic MFC after: 1 month
2012-01-12 00:34:33 +00:00
} ctl_ua_type;
#ifdef _KERNEL
MALLOC_DECLARE(M_CTL);
typedef enum {
CTL_THREAD_NONE = 0x00,
CTL_THREAD_WAKEUP = 0x01
} ctl_thread_flags;
struct ctl_thread {
void (*thread_func)(void *arg);
void *arg;
struct cv wait_queue;
const char *thread_name;
ctl_thread_flags thread_flags;
struct completion *thread_event;
struct task_struct *task;
};
struct ctl_page_index;
#ifdef SYSCTL_DECL /* from sysctl.h */
SYSCTL_DECL(_kern_cam_ctl);
#endif
/*
* Call these routines to enable or disable front end ports.
*/
int ctl_port_enable(ctl_port_type port_type);
int ctl_port_disable(ctl_port_type port_type);
/*
* This routine grabs a list of frontend ports.
*/
int ctl_port_list(struct ctl_port_entry *entries, int num_entries_alloced,
int *num_entries_filled, int *num_entries_dropped,
ctl_port_type port_type, int no_virtual);
/*
* Put a string into an sbuf, escaping characters that are illegal or not
* recommended in XML. Note this doesn't escape everything, just > < and &.
*/
int ctl_sbuf_printf_esc(struct sbuf *sb, char *str);
int ctl_ffz(uint32_t *mask, uint32_t size);
int ctl_set_mask(uint32_t *mask, uint32_t bit);
int ctl_clear_mask(uint32_t *mask, uint32_t bit);
int ctl_is_set(uint32_t *mask, uint32_t bit);
int ctl_control_page_handler(struct ctl_scsiio *ctsio,
struct ctl_page_index *page_index,
uint8_t *page_ptr);
/**
int ctl_failover_sp_handler(struct ctl_scsiio *ctsio,
struct ctl_page_index *page_index,
uint8_t *page_ptr);
**/
int ctl_power_sp_handler(struct ctl_scsiio *ctsio,
struct ctl_page_index *page_index, uint8_t *page_ptr);
int ctl_power_sp_sense_handler(struct ctl_scsiio *ctsio,
struct ctl_page_index *page_index, int pc);
int ctl_aps_sp_handler(struct ctl_scsiio *ctsio,
struct ctl_page_index *page_index, uint8_t *page_ptr);
int ctl_debugconf_sp_sense_handler(struct ctl_scsiio *ctsio,
struct ctl_page_index *page_index,
int pc);
int ctl_debugconf_sp_select_handler(struct ctl_scsiio *ctsio,
struct ctl_page_index *page_index,
uint8_t *page_ptr);
int ctl_config_move_done(union ctl_io *io);
void ctl_datamove(union ctl_io *io);
void ctl_done(union ctl_io *io);
void ctl_config_write_done(union ctl_io *io);
#if 0
int ctl_thread(void *arg);
#endif
void ctl_wakeup_thread(void);
#if 0
struct ctl_thread *ctl_create_thread(void (*thread_func)
(void *thread_arg), void *thread_arg, const char *thread_name);
void ctl_signal_thread(struct ctl_thread *thread);
void ctl_shutdown_thread(struct ctl_thread *thread);
#endif
void ctl_portDB_changed(int portnum);
void ctl_init_isc_msg(void);
#endif /* _KERNEL */
#endif /* _CTL_H_ */
/*
* vim: ts=8
*/