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freebsd/sys/geom/geom_disk.h
Justin T. Gibbs 416494d7c9 Plumb device physical path reporting from CAM devices, through GEOM and
DEVFS, and make it accessible via the diskinfo utility.

Extend GEOM's generic attribute query mechanism into generic disk consumers.
sys/geom/geom_disk.c:
sys/geom/geom_disk.h:
sys/cam/scsi/scsi_da.c:
sys/cam/ata/ata_da.c:
	- Allow disk providers to implement a new method which can override
	  the default BIO_GETATTR response, d_getattr(struct bio *).  This
	  function returns -1 if not handled, otherwise it returns 0 or an
	  errno to be passed to g_io_deliver().

sys/cam/scsi/scsi_da.c:
sys/cam/ata/ata_da.c:
	- Don't copy the serial number to dp->d_ident anymore, as the CAM XPT
	  is now responsible for returning this information via
	  d_getattr()->(a)dagetattr()->xpt_getatr().

sys/geom/geom_dev.c:
	- Implement a new ioctl, DIOCGPHYSPATH, which returns the GEOM
	  attribute "GEOM::physpath", if possible.  If the attribute request
	  returns a zero-length string, ENOENT is returned.

usr.sbin/diskinfo/diskinfo.c:
	- If the DIOCGPHYSPATH ioctl is successful, report physical path
	  data when diskinfo is executed with the '-v' option.

Submitted by:	will
Reviewed by:	gibbs
Sponsored by:	Spectra Logic Corporation

Add generic attribute change notification support to GEOM.

sys/sys/geom/geom.h:
	Add a new attrchanged method field to both g_class
	and g_geom.

sys/sys/geom/geom.h:
sys/geom/geom_event.c:
	- Provide the g_attr_changed() function that providers
	  can use to advertise attribute changes.
	- Perform delivery of attribute change notifications
	  from a thread context via the standard GEOM event
	  mechanism.

sys/geom/geom_subr.c:
	Inherit the attrchanged method from class to geom (class instance).

sys/geom/geom_disk.c:
	Provide disk_attr_changed() to provide g_attr_changed() access
	to consumers of the disk API.

sys/cam/scsi/scsi_pass.c:
sys/cam/scsi/scsi_da.c:
sys/geom/geom_dev.c:
sys/geom/geom_disk.c:
	Use attribute changed events to track updates to physical path
	information.

sys/cam/scsi/scsi_da.c:
	Add AC_ADVINFO_CHANGED to the registered asynchronous CAM
	events for this driver.  When this event occurs, and
	the updated buffer type references our physical path
	attribute, emit a GEOM attribute changed event via the
	disk_attr_changed() API.

sys/cam/scsi/scsi_pass.c:
	Add AC_ADVINFO_CHANGED to the registered asynchronous CAM
	events for this driver.  When this event occurs, update
	the physical patch devfs alias for this pass instance.

Submitted by:	gibbs
Sponsored by:	Spectra Logic Corporation
2011-06-14 17:10:32 +00:00

117 lines
3.7 KiB
C

/*-
* Copyright (c) 2003 Poul-Henning Kamp
* All rights reserved.
*
* This software was developed for the FreeBSD Project by Poul-Henning Kamp
* and NAI Labs, the Security Research Division of Network Associates, Inc.
* under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
* DARPA CHATS research program.
*
* 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. The names of the authors may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 AUTHOR 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.
*
* $FreeBSD$
*/
#ifndef _GEOM_GEOM_DISK_H_
#define _GEOM_GEOM_DISK_H_
#ifdef _KERNEL
#include <sys/queue.h>
#include <sys/_lock.h>
#include <sys/_mutex.h>
#include <sys/disk.h>
struct disk;
typedef int disk_open_t(struct disk *);
typedef int disk_close_t(struct disk *);
typedef void disk_strategy_t(struct bio *bp);
typedef int disk_getattr_t(struct bio *bp);
typedef int disk_ioctl_t(struct disk *, u_long cmd, void *data,
int fflag, struct thread *td);
/* NB: disk_ioctl_t SHALL be cast'able to d_ioctl_t */
struct g_geom;
struct devstat;
struct disk {
/* Fields which are private to geom_disk */
struct g_geom *d_geom;
struct devstat *d_devstat;
int d_destroyed;
/* Shared fields */
u_int d_flags;
const char *d_name;
u_int d_unit;
struct bio_queue_head *d_queue;
struct mtx *d_lock;
/* Disk methods */
disk_open_t *d_open;
disk_close_t *d_close;
disk_strategy_t *d_strategy;
disk_ioctl_t *d_ioctl;
dumper_t *d_dump;
disk_getattr_t *d_getattr;
/* Info fields from driver to geom_disk.c. Valid when open */
u_int d_sectorsize;
off_t d_mediasize;
u_int d_fwsectors;
u_int d_fwheads;
u_int d_maxsize;
u_int d_stripeoffset;
u_int d_stripesize;
char d_ident[DISK_IDENT_SIZE];
char d_descr[DISK_IDENT_SIZE];
uint16_t d_hba_vendor;
uint16_t d_hba_device;
uint16_t d_hba_subvendor;
uint16_t d_hba_subdevice;
/* Fields private to the driver */
void *d_drv1;
};
#define DISKFLAG_NEEDSGIANT 0x1
#define DISKFLAG_OPEN 0x2
#define DISKFLAG_CANDELETE 0x4
#define DISKFLAG_CANFLUSHCACHE 0x8
struct disk *disk_alloc(void);
void disk_create(struct disk *disk, int version);
void disk_destroy(struct disk *disk);
void disk_gone(struct disk *disk);
void disk_attr_changed(struct disk *dp, const char *attr, int flag);
#define DISK_VERSION_00 0x58561059
#define DISK_VERSION_01 0x5856105a
#define DISK_VERSION DISK_VERSION_01
#endif /* _KERNEL */
#endif /* _GEOM_GEOM_DISK_H_ */