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freebsd-dev/sys/cam/cam_compat.c
Alexander Motin 8f9be1eed1 cam(4): Improve XPT_DEV_MATCH 
Remove *_MATCH_NONE enums, making no sense and so never used.  Make
*_MATCH_ANY enums 0 (no any match flags set), previously used by
*_MATCH_NONE.  Bump CAM_VERSION to 0x1a reflecting those changes and
add compat shims.

When traversing through buses and devices do not descend if we can
already see that requested pattern does not match the bus or device.
It allows to save significant amount of time on system with thousands
of disks when doing limited searches.

Reviewed by:	imp
MFC after:	2 weeks
Sponsored by:	iXsystems, Inc.
Differential Revision:	https://reviews.freebsd.org/D32304
2021-10-05 14:54:03 -04:00

469 lines
15 KiB
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/*-
* CAM ioctl compatibility shims
*
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2013 Scott Long
* 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, immediately at the beginning of the file.
* 2. The name of the author 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.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/types.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/fcntl.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/sysctl.h>
#include <sys/kthread.h>
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_xpt.h>
#include <cam/cam_compat.h>
#include <cam/cam_periph.h>
#include <cam/scsi/scsi_pass.h>
#include "opt_cam.h"
static int cam_compat_handle_0x17(struct cdev *dev, u_long cmd, caddr_t addr,
int flag, struct thread *td, d_ioctl_t *cbfnp);
static int cam_compat_handle_0x18(struct cdev *dev, u_long cmd, caddr_t addr,
int flag, struct thread *td, d_ioctl_t *cbfnp);
static int cam_compat_handle_0x19(struct cdev *dev, u_long cmd, caddr_t addr,
int flag, struct thread *td, d_ioctl_t *cbfnp);
static int cam_compat_translate_dev_match_0x18(union ccb *ccb);
int
cam_compat_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag,
struct thread *td, d_ioctl_t *cbfnp)
{
int error;
switch (cmd) {
case CAMIOCOMMAND_0x16:
{
struct ccb_hdr_0x17 *hdr17;
hdr17 = (struct ccb_hdr_0x17 *)addr;
if (hdr17->flags & CAM_SG_LIST_PHYS_0x16) {
hdr17->flags &= ~CAM_SG_LIST_PHYS_0x16;
hdr17->flags |= CAM_DATA_SG_PADDR;
}
if (hdr17->flags & CAM_DATA_PHYS_0x16) {
hdr17->flags &= ~CAM_DATA_PHYS_0x16;
hdr17->flags |= CAM_DATA_PADDR;
}
if (hdr17->flags & CAM_SCATTER_VALID_0x16) {
hdr17->flags &= CAM_SCATTER_VALID_0x16;
hdr17->flags |= CAM_DATA_SG;
}
cmd = CAMIOCOMMAND;
error = cam_compat_handle_0x17(dev, cmd, addr, flag, td, cbfnp);
break;
}
case CAMGETPASSTHRU_0x16:
cmd = CAMGETPASSTHRU;
error = cam_compat_handle_0x17(dev, cmd, addr, flag, td, cbfnp);
break;
case CAMIOCOMMAND_0x17:
cmd = CAMIOCOMMAND;
error = cam_compat_handle_0x17(dev, cmd, addr, flag, td, cbfnp);
break;
case CAMGETPASSTHRU_0x17:
cmd = CAMGETPASSTHRU;
error = cam_compat_handle_0x17(dev, cmd, addr, flag, td, cbfnp);
break;
case CAMIOCOMMAND_0x18:
cmd = CAMIOCOMMAND;
error = cam_compat_handle_0x18(dev, cmd, addr, flag, td, cbfnp);
break;
case CAMGETPASSTHRU_0x18:
cmd = CAMGETPASSTHRU;
error = cam_compat_handle_0x18(dev, cmd, addr, flag, td, cbfnp);
break;
case CAMIOCOMMAND_0x19:
cmd = CAMIOCOMMAND;
error = cam_compat_handle_0x19(dev, cmd, addr, flag, td, cbfnp);
break;
case CAMGETPASSTHRU_0x19:
cmd = CAMGETPASSTHRU;
error = cam_compat_handle_0x19(dev, cmd, addr, flag, td, cbfnp);
break;
case CAMIOQUEUE_0x19:
cmd = CAMIOQUEUE;
error = cam_compat_handle_0x19(dev, cmd, addr, flag, td, cbfnp);
break;
case CAMIOGET_0x19:
cmd = CAMIOGET;
error = cam_compat_handle_0x19(dev, cmd, addr, flag, td, cbfnp);
break;
default:
error = ENOTTY;
}
return (error);
}
static int
cam_compat_handle_0x17(struct cdev *dev, u_long cmd, caddr_t addr, int flag,
struct thread *td, d_ioctl_t *cbfnp)
{
union ccb *ccb;
struct ccb_hdr *hdr;
struct ccb_hdr_0x17 *hdr17;
uint8_t *ccbb, *ccbb17;
u_int error;
hdr17 = (struct ccb_hdr_0x17 *)addr;
ccb = xpt_alloc_ccb();
hdr = &ccb->ccb_h;
hdr->pinfo = hdr17->pinfo;
hdr->xpt_links = hdr17->xpt_links;
hdr->sim_links = hdr17->sim_links;
hdr->periph_links = hdr17->periph_links;
hdr->retry_count = hdr17->retry_count;
hdr->cbfcnp = hdr17->cbfcnp;
hdr->func_code = hdr17->func_code;
hdr->status = hdr17->status;
hdr->path = hdr17->path;
hdr->path_id = hdr17->path_id;
hdr->target_id = hdr17->target_id;
hdr->target_lun = hdr17->target_lun;
hdr->flags = hdr17->flags;
hdr->xflags = 0;
hdr->periph_priv = hdr17->periph_priv;
hdr->sim_priv = hdr17->sim_priv;
hdr->timeout = hdr17->timeout;
hdr->softtimeout.tv_sec = 0;
hdr->softtimeout.tv_usec = 0;
ccbb = (uint8_t *)&hdr[1];
ccbb17 = (uint8_t *)&hdr17[1];
if (ccb->ccb_h.func_code == XPT_SET_TRAN_SETTINGS) {
struct ccb_trans_settings *cts;
struct ccb_trans_settings_0x17 *cts17;
cts = &ccb->cts;
cts17 = (struct ccb_trans_settings_0x17 *)hdr17;
cts->type = cts17->type;
cts->protocol = cts17->protocol;
cts->protocol_version = cts17->protocol_version;
cts->transport = cts17->transport;
cts->transport_version = cts17->transport_version;
bcopy(&cts17->proto_specific, &cts->proto_specific,
sizeof(cts17->proto_specific));
bcopy(&cts17->xport_specific, &cts->xport_specific,
sizeof(cts17->xport_specific));
} else {
bcopy(ccbb17, ccbb, CAM_0X17_DATA_LEN);
}
error = cam_compat_handle_0x19(dev, cmd, (caddr_t)ccb, flag, td, cbfnp);
hdr17->pinfo = hdr->pinfo;
hdr17->xpt_links = hdr->xpt_links;
hdr17->sim_links = hdr->sim_links;
hdr17->periph_links = hdr->periph_links;
hdr17->retry_count = hdr->retry_count;
hdr17->cbfcnp = hdr->cbfcnp;
hdr17->func_code = hdr->func_code;
hdr17->status = hdr->status;
hdr17->path = hdr->path;
hdr17->path_id = hdr->path_id;
hdr17->target_id = hdr->target_id;
hdr17->target_lun = hdr->target_lun;
hdr17->flags = hdr->flags;
hdr17->periph_priv = hdr->periph_priv;
hdr17->sim_priv = hdr->sim_priv;
hdr17->timeout = hdr->timeout;
if (ccb->ccb_h.func_code == XPT_PATH_INQ) {
struct ccb_pathinq *cpi;
struct ccb_pathinq_0x17 *cpi17;
/* The PATH_INQ only needs special handling on the way out */
cpi = &ccb->cpi;
cpi17 = (struct ccb_pathinq_0x17 *)hdr17;
cpi17->version_num = cpi->version_num;
cpi17->hba_inquiry = cpi->hba_inquiry;
cpi17->target_sprt = (u_int8_t)cpi->target_sprt;
cpi17->hba_misc = (u_int8_t)cpi->hba_misc;
cpi17->hba_eng_cnt = cpi->hba_eng_cnt;
bcopy(&cpi->vuhba_flags[0], &cpi17->vuhba_flags[0], VUHBALEN);
cpi17->max_target = cpi->max_target;
cpi17->max_lun = cpi->max_lun;
cpi17->async_flags = cpi->async_flags;
cpi17->hpath_id = cpi->hpath_id;
cpi17->initiator_id = cpi->initiator_id;
bcopy(&cpi->sim_vid[0], &cpi17->sim_vid[0], SIM_IDLEN);
bcopy(&cpi->hba_vid[0], &cpi17->hba_vid[0], HBA_IDLEN);
bcopy(&cpi->dev_name[0], &cpi17->dev_name[0], DEV_IDLEN);
cpi17->unit_number = cpi->unit_number;
cpi17->bus_id = cpi->bus_id;
cpi17->base_transfer_speed = cpi->base_transfer_speed;
cpi17->protocol = cpi->protocol;
cpi17->protocol_version = cpi->protocol_version;
cpi17->transport = cpi->transport;
cpi17->transport_version = cpi->transport_version;
bcopy(&cpi->xport_specific, &cpi17->xport_specific,
PATHINQ_SETTINGS_SIZE);
cpi17->maxio = cpi->maxio;
cpi17->hba_vendor = cpi->hba_vendor;
cpi17->hba_device = cpi->hba_device;
cpi17->hba_subvendor = cpi->hba_subvendor;
cpi17->hba_subdevice = cpi->hba_subdevice;
} else if (ccb->ccb_h.func_code == XPT_GET_TRAN_SETTINGS) {
struct ccb_trans_settings *cts;
struct ccb_trans_settings_0x17 *cts17;
cts = &ccb->cts;
cts17 = (struct ccb_trans_settings_0x17 *)hdr17;
cts17->type = cts->type;
cts17->protocol = cts->protocol;
cts17->protocol_version = cts->protocol_version;
cts17->transport = cts->transport;
cts17->transport_version = cts->transport_version;
bcopy(&cts->proto_specific, &cts17->proto_specific,
sizeof(cts17->proto_specific));
bcopy(&cts->xport_specific, &cts17->xport_specific,
sizeof(cts17->xport_specific));
} else if (ccb->ccb_h.func_code == XPT_DEV_MATCH) {
/* Copy the rest of the header over */
bcopy(ccbb, ccbb17, CAM_0X17_DATA_LEN);
cam_compat_translate_dev_match_0x18(ccb);
} else {
bcopy(ccbb, ccbb17, CAM_0X17_DATA_LEN);
}
xpt_free_ccb(ccb);
return (error);
}
static int
cam_compat_handle_0x18(struct cdev *dev, u_long cmd, caddr_t addr, int flag,
struct thread *td, d_ioctl_t *cbfnp)
{
union ccb *ccb;
struct ccb_hdr *hdr;
struct ccb_hdr_0x18 *hdr18;
uint8_t *ccbb, *ccbb18;
u_int error;
hdr18 = (struct ccb_hdr_0x18 *)addr;
ccb = xpt_alloc_ccb();
hdr = &ccb->ccb_h;
hdr->pinfo = hdr18->pinfo;
hdr->xpt_links = hdr18->xpt_links;
hdr->sim_links = hdr18->sim_links;
hdr->periph_links = hdr18->periph_links;
hdr->retry_count = hdr18->retry_count;
hdr->cbfcnp = hdr18->cbfcnp;
hdr->func_code = hdr18->func_code;
hdr->status = hdr18->status;
hdr->path = hdr18->path;
hdr->path_id = hdr18->path_id;
hdr->target_id = hdr18->target_id;
hdr->target_lun = hdr18->target_lun;
if (hdr18->xflags & CAM_EXTLUN_VALID_0x18)
hdr->target_lun = hdr18->ext_lun;
hdr->flags = hdr18->flags;
hdr->xflags = hdr18->xflags;
hdr->periph_priv = hdr18->periph_priv;
hdr->sim_priv = hdr18->sim_priv;
hdr->timeout = hdr18->timeout;
hdr->softtimeout.tv_sec = 0;
hdr->softtimeout.tv_usec = 0;
ccbb = (uint8_t *)&hdr[1];
ccbb18 = (uint8_t *)&hdr18[1];
if (ccb->ccb_h.func_code == XPT_SET_TRAN_SETTINGS) {
struct ccb_trans_settings *cts;
struct ccb_trans_settings_0x18 *cts18;
cts = &ccb->cts;
cts18 = (struct ccb_trans_settings_0x18 *)hdr18;
cts->type = cts18->type;
cts->protocol = cts18->protocol;
cts->protocol_version = cts18->protocol_version;
cts->transport = cts18->transport;
cts->transport_version = cts18->transport_version;
bcopy(&cts18->proto_specific, &cts->proto_specific,
sizeof(cts18->proto_specific));
bcopy(&cts18->xport_specific, &cts->xport_specific,
sizeof(cts18->xport_specific));
} else {
bcopy(ccbb18, ccbb, CAM_0X18_DATA_LEN);
}
error = cam_compat_handle_0x19(dev, cmd, (caddr_t)ccb, flag, td, cbfnp);
hdr18->pinfo = hdr->pinfo;
hdr18->xpt_links = hdr->xpt_links;
hdr18->sim_links = hdr->sim_links;
hdr18->periph_links = hdr->periph_links;
hdr18->retry_count = hdr->retry_count;
hdr18->cbfcnp = hdr->cbfcnp;
hdr18->func_code = hdr->func_code;
hdr18->status = hdr->status;
hdr18->path = hdr->path;
hdr18->path_id = hdr->path_id;
hdr18->target_id = hdr->target_id;
hdr18->target_lun = hdr->target_lun;
hdr18->ext_lun = hdr->target_lun;
hdr18->flags = hdr->flags;
hdr18->xflags = hdr->xflags | CAM_EXTLUN_VALID_0x18;
hdr18->periph_priv = hdr->periph_priv;
hdr18->sim_priv = hdr->sim_priv;
hdr18->timeout = hdr->timeout;
if (ccb->ccb_h.func_code == XPT_GET_TRAN_SETTINGS) {
struct ccb_trans_settings *cts;
struct ccb_trans_settings_0x18 *cts18;
cts = &ccb->cts;
cts18 = (struct ccb_trans_settings_0x18 *)hdr18;
cts18->type = cts->type;
cts18->protocol = cts->protocol;
cts18->protocol_version = cts->protocol_version;
cts18->transport = cts->transport;
cts18->transport_version = cts->transport_version;
bcopy(&cts->proto_specific, &cts18->proto_specific,
sizeof(cts18->proto_specific));
bcopy(&cts->xport_specific, &cts18->xport_specific,
sizeof(cts18->xport_specific));
} else if (ccb->ccb_h.func_code == XPT_DEV_MATCH) {
bcopy(ccbb, ccbb18, CAM_0X18_DATA_LEN);
cam_compat_translate_dev_match_0x18(ccb);
} else {
bcopy(ccbb, ccbb18, CAM_0X18_DATA_LEN);
}
xpt_free_ccb(ccb);
return (error);
}
static int
cam_compat_translate_dev_match_0x18(union ccb *ccb)
{
struct dev_match_result *dm;
struct dev_match_result_0x18 *dm18;
struct cam_periph_map_info mapinfo;
int i;
/* Remap the CCB into kernel address space */
bzero(&mapinfo, sizeof(mapinfo));
cam_periph_mapmem(ccb, &mapinfo, maxphys);
dm = ccb->cdm.matches;
/* Translate in-place: old fields are smaller */
dm18 = (struct dev_match_result_0x18 *)(dm);
for (i = 0; i < ccb->cdm.num_matches; i++) {
dm18[i].type = dm[i].type;
switch (dm[i].type) {
case DEV_MATCH_PERIPH:
memcpy(&dm18[i].result.periph_result.periph_name,
&dm[i].result.periph_result.periph_name,
DEV_IDLEN);
dm18[i].result.periph_result.unit_number =
dm[i].result.periph_result.unit_number;
dm18[i].result.periph_result.path_id =
dm[i].result.periph_result.path_id;
dm18[i].result.periph_result.target_id =
dm[i].result.periph_result.target_id;
dm18[i].result.periph_result.target_lun =
dm[i].result.periph_result.target_lun;
break;
case DEV_MATCH_DEVICE:
dm18[i].result.device_result.path_id =
dm[i].result.device_result.path_id;
dm18[i].result.device_result.target_id =
dm[i].result.device_result.target_id;
dm18[i].result.device_result.target_lun =
dm[i].result.device_result.target_lun;
dm18[i].result.device_result.protocol =
dm[i].result.device_result.protocol;
memcpy(&dm18[i].result.device_result.inq_data,
&dm[i].result.device_result.inq_data,
sizeof(struct scsi_inquiry_data));
memcpy(&dm18[i].result.device_result.ident_data,
&dm[i].result.device_result.ident_data,
sizeof(struct ata_params));
dm18[i].result.device_result.flags =
dm[i].result.device_result.flags;
break;
case DEV_MATCH_BUS:
memcpy(&dm18[i].result.bus_result,
&dm[i].result.bus_result,
sizeof(struct bus_match_result));
break;
}
}
cam_periph_unmapmem(ccb, &mapinfo);
return (0);
}
static int
cam_compat_handle_0x19(struct cdev *dev, u_long cmd, caddr_t addr, int flag,
struct thread *td, d_ioctl_t *cbfnp)
{
union ccb *ccb = (union ccb *)addr;
struct cam_periph_map_info mapinfo;
if (cmd == CAMIOCOMMAND && ccb->ccb_h.func_code == XPT_DEV_MATCH) {
bzero(&mapinfo, sizeof(mapinfo));
cam_periph_mapmem(ccb, &mapinfo, maxphys);
for (int i = 0; i < ccb->cdm.num_patterns; i++) {
struct dev_match_pattern *p = &ccb->cdm.patterns[i];
if (p->type == DEV_MATCH_BUS &&
p->pattern.bus_pattern.flags == 0x00f)
p->pattern.bus_pattern.flags = BUS_MATCH_ANY;
if (p->type == DEV_MATCH_DEVICE &&
p->pattern.device_pattern.flags == 0x00f)
p->pattern.device_pattern.flags = DEV_MATCH_ANY;
if (p->type == DEV_MATCH_PERIPH &&
p->pattern.periph_pattern.flags == 0x01f)
p->pattern.periph_pattern.flags = PERIPH_MATCH_ANY;
}
cam_periph_unmapmem(ccb, &mapinfo);
}
return ((cbfnp)(dev, cmd, addr, flag, td));
}
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