2005-04-16 22:20:36 +00:00
|
|
|
/*
|
|
|
|
* scsi_sysfs.c
|
|
|
|
*
|
|
|
|
* SCSI sysfs interface routines.
|
|
|
|
*
|
|
|
|
* Created to pull SCSI mid layer sysfs routines into one file.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/module.h>
|
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 08:04:11 +00:00
|
|
|
#include <linux/slab.h>
|
2005-04-16 22:20:36 +00:00
|
|
|
#include <linux/init.h>
|
|
|
|
#include <linux/blkdev.h>
|
|
|
|
#include <linux/device.h>
|
[SCSI] implement runtime Power Management
This patch (as1398b) adds runtime PM support to the SCSI layer. Only
the machanism is provided; use of it is up to the various high-level
drivers, and the patch doesn't change any of them. Except for sg --
the patch expicitly prevents a device from being runtime-suspended
while its sg device file is open.
The implementation is simplistic. In general, hosts and targets are
automatically suspended when all their children are asleep, but for
them the runtime-suspend code doesn't actually do anything. (A host's
runtime PM status is propagated up the device tree, though, so a
runtime-PM-aware lower-level driver could power down the host adapter
hardware at the appropriate times.) There are comments indicating
where a transport class might be notified or some other hooks added.
LUNs are runtime-suspended by calling the drivers' existing suspend
handlers (and likewise for runtime-resume). Somewhat arbitrarily, the
implementation delays for 100 ms before suspending an eligible LUN.
This is because there typically are occasions during bootup when the
same device file is opened and closed several times in quick
succession.
The way this all works is that the SCSI core increments a device's
PM-usage count when it is registered. If a high-level driver does
nothing then the device will not be eligible for runtime-suspend
because of the elevated usage count. If a high-level driver wants to
use runtime PM then it can call scsi_autopm_put_device() in its probe
routine to decrement the usage count and scsi_autopm_get_device() in
its remove routine to restore the original count.
Hosts, targets, and LUNs are not suspended while they are being probed
or removed, or while the error handler is running. In fact, a fairly
large part of the patch consists of code to make sure that things
aren't suspended at such times.
[jejb: fix up compile issues in PM config variations]
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-06-17 14:41:42 +00:00
|
|
|
#include <linux/pm_runtime.h>
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
#include <scsi/scsi.h>
|
|
|
|
#include <scsi/scsi_device.h>
|
|
|
|
#include <scsi/scsi_host.h>
|
|
|
|
#include <scsi/scsi_tcq.h>
|
|
|
|
#include <scsi/scsi_transport.h>
|
2007-07-09 18:59:59 +00:00
|
|
|
#include <scsi/scsi_driver.h>
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
#include "scsi_priv.h"
|
|
|
|
#include "scsi_logging.h"
|
|
|
|
|
2008-03-18 13:32:28 +00:00
|
|
|
static struct device_type scsi_dev_type;
|
|
|
|
|
2005-11-28 15:22:25 +00:00
|
|
|
static const struct {
|
2005-04-16 22:20:36 +00:00
|
|
|
enum scsi_device_state value;
|
|
|
|
char *name;
|
|
|
|
} sdev_states[] = {
|
|
|
|
{ SDEV_CREATED, "created" },
|
|
|
|
{ SDEV_RUNNING, "running" },
|
|
|
|
{ SDEV_CANCEL, "cancel" },
|
|
|
|
{ SDEV_DEL, "deleted" },
|
|
|
|
{ SDEV_QUIESCE, "quiesce" },
|
|
|
|
{ SDEV_OFFLINE, "offline" },
|
2012-05-18 04:56:56 +00:00
|
|
|
{ SDEV_TRANSPORT_OFFLINE, "transport-offline" },
|
2005-04-16 22:20:36 +00:00
|
|
|
{ SDEV_BLOCK, "blocked" },
|
2008-08-22 21:53:31 +00:00
|
|
|
{ SDEV_CREATED_BLOCK, "created-blocked" },
|
2005-04-16 22:20:36 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
const char *scsi_device_state_name(enum scsi_device_state state)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
char *name = NULL;
|
|
|
|
|
2006-06-09 05:23:48 +00:00
|
|
|
for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
|
2005-04-16 22:20:36 +00:00
|
|
|
if (sdev_states[i].value == state) {
|
|
|
|
name = sdev_states[i].name;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return name;
|
|
|
|
}
|
|
|
|
|
2005-11-28 15:22:25 +00:00
|
|
|
static const struct {
|
2005-06-16 18:12:38 +00:00
|
|
|
enum scsi_host_state value;
|
|
|
|
char *name;
|
|
|
|
} shost_states[] = {
|
|
|
|
{ SHOST_CREATED, "created" },
|
|
|
|
{ SHOST_RUNNING, "running" },
|
|
|
|
{ SHOST_CANCEL, "cancel" },
|
|
|
|
{ SHOST_DEL, "deleted" },
|
|
|
|
{ SHOST_RECOVERY, "recovery" },
|
2005-09-18 20:05:20 +00:00
|
|
|
{ SHOST_CANCEL_RECOVERY, "cancel/recovery" },
|
|
|
|
{ SHOST_DEL_RECOVERY, "deleted/recovery", },
|
2005-06-16 18:12:38 +00:00
|
|
|
};
|
|
|
|
const char *scsi_host_state_name(enum scsi_host_state state)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
char *name = NULL;
|
|
|
|
|
2006-06-09 05:23:48 +00:00
|
|
|
for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
|
2005-06-16 18:12:38 +00:00
|
|
|
if (shost_states[i].value == state) {
|
|
|
|
name = shost_states[i].name;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return name;
|
|
|
|
}
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
static int check_set(unsigned int *val, char *src)
|
|
|
|
{
|
|
|
|
char *last;
|
|
|
|
|
|
|
|
if (strncmp(src, "-", 20) == 0) {
|
|
|
|
*val = SCAN_WILD_CARD;
|
|
|
|
} else {
|
|
|
|
/*
|
|
|
|
* Doesn't check for int overflow
|
|
|
|
*/
|
|
|
|
*val = simple_strtoul(src, &last, 0);
|
|
|
|
if (*last != '\0')
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int scsi_scan(struct Scsi_Host *shost, const char *str)
|
|
|
|
{
|
|
|
|
char s1[15], s2[15], s3[15], junk;
|
|
|
|
unsigned int channel, id, lun;
|
|
|
|
int res;
|
|
|
|
|
|
|
|
res = sscanf(str, "%10s %10s %10s %c", s1, s2, s3, &junk);
|
|
|
|
if (res != 3)
|
|
|
|
return -EINVAL;
|
|
|
|
if (check_set(&channel, s1))
|
|
|
|
return -EINVAL;
|
|
|
|
if (check_set(&id, s2))
|
|
|
|
return -EINVAL;
|
|
|
|
if (check_set(&lun, s3))
|
|
|
|
return -EINVAL;
|
2006-01-13 18:04:00 +00:00
|
|
|
if (shost->transportt->user_scan)
|
|
|
|
res = shost->transportt->user_scan(shost, channel, id, lun);
|
|
|
|
else
|
|
|
|
res = scsi_scan_host_selected(shost, channel, id, lun, 1);
|
2005-04-16 22:20:36 +00:00
|
|
|
return res;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* shost_show_function: macro to create an attr function that can be used to
|
|
|
|
* show a non-bit field.
|
|
|
|
*/
|
|
|
|
#define shost_show_function(name, field, format_string) \
|
|
|
|
static ssize_t \
|
2008-02-21 23:13:36 +00:00
|
|
|
show_##name (struct device *dev, struct device_attribute *attr, \
|
|
|
|
char *buf) \
|
2005-04-16 22:20:36 +00:00
|
|
|
{ \
|
2008-02-21 23:13:36 +00:00
|
|
|
struct Scsi_Host *shost = class_to_shost(dev); \
|
2005-04-16 22:20:36 +00:00
|
|
|
return snprintf (buf, 20, format_string, shost->field); \
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* shost_rd_attr: macro to create a function and attribute variable for a
|
|
|
|
* read only field.
|
|
|
|
*/
|
|
|
|
#define shost_rd_attr2(name, field, format_string) \
|
|
|
|
shost_show_function(name, field, format_string) \
|
2008-02-21 23:13:36 +00:00
|
|
|
static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
#define shost_rd_attr(field, format_string) \
|
|
|
|
shost_rd_attr2(field, field, format_string)
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Create the actual show/store functions and data structures.
|
|
|
|
*/
|
|
|
|
|
2008-02-21 23:13:36 +00:00
|
|
|
static ssize_t
|
|
|
|
store_scan(struct device *dev, struct device_attribute *attr,
|
|
|
|
const char *buf, size_t count)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2008-02-21 23:13:36 +00:00
|
|
|
struct Scsi_Host *shost = class_to_shost(dev);
|
2005-04-16 22:20:36 +00:00
|
|
|
int res;
|
|
|
|
|
|
|
|
res = scsi_scan(shost, buf);
|
|
|
|
if (res == 0)
|
|
|
|
res = count;
|
|
|
|
return res;
|
|
|
|
};
|
2008-02-21 23:13:36 +00:00
|
|
|
static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-06-16 18:12:38 +00:00
|
|
|
static ssize_t
|
2008-02-21 23:13:36 +00:00
|
|
|
store_shost_state(struct device *dev, struct device_attribute *attr,
|
|
|
|
const char *buf, size_t count)
|
2005-06-16 18:12:38 +00:00
|
|
|
{
|
|
|
|
int i;
|
2008-02-21 23:13:36 +00:00
|
|
|
struct Scsi_Host *shost = class_to_shost(dev);
|
2005-06-16 18:12:38 +00:00
|
|
|
enum scsi_host_state state = 0;
|
|
|
|
|
2006-06-09 05:23:48 +00:00
|
|
|
for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
|
2005-06-16 18:12:38 +00:00
|
|
|
const int len = strlen(shost_states[i].name);
|
|
|
|
if (strncmp(shost_states[i].name, buf, len) == 0 &&
|
|
|
|
buf[len] == '\n') {
|
|
|
|
state = shost_states[i].value;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (!state)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (scsi_host_set_state(shost, state))
|
|
|
|
return -EINVAL;
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t
|
2008-02-21 23:13:36 +00:00
|
|
|
show_shost_state(struct device *dev, struct device_attribute *attr, char *buf)
|
2005-06-16 18:12:38 +00:00
|
|
|
{
|
2008-02-21 23:13:36 +00:00
|
|
|
struct Scsi_Host *shost = class_to_shost(dev);
|
2005-06-16 18:12:38 +00:00
|
|
|
const char *name = scsi_host_state_name(shost->shost_state);
|
|
|
|
|
|
|
|
if (!name)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
return snprintf(buf, 20, "%s\n", name);
|
|
|
|
}
|
|
|
|
|
2008-02-21 23:13:36 +00:00
|
|
|
/* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */
|
|
|
|
struct device_attribute dev_attr_hstate =
|
|
|
|
__ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state);
|
2005-06-16 18:12:38 +00:00
|
|
|
|
2007-08-31 17:02:20 +00:00
|
|
|
static ssize_t
|
|
|
|
show_shost_mode(unsigned int mode, char *buf)
|
|
|
|
{
|
|
|
|
ssize_t len = 0;
|
|
|
|
|
|
|
|
if (mode & MODE_INITIATOR)
|
|
|
|
len = sprintf(buf, "%s", "Initiator");
|
|
|
|
|
|
|
|
if (mode & MODE_TARGET)
|
|
|
|
len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target");
|
|
|
|
|
|
|
|
len += sprintf(buf + len, "\n");
|
|
|
|
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
2008-02-21 23:13:36 +00:00
|
|
|
static ssize_t
|
|
|
|
show_shost_supported_mode(struct device *dev, struct device_attribute *attr,
|
|
|
|
char *buf)
|
2007-08-31 17:02:20 +00:00
|
|
|
{
|
2008-02-21 23:13:36 +00:00
|
|
|
struct Scsi_Host *shost = class_to_shost(dev);
|
2007-09-26 03:45:53 +00:00
|
|
|
unsigned int supported_mode = shost->hostt->supported_mode;
|
2007-08-31 17:02:20 +00:00
|
|
|
|
2007-09-26 03:45:53 +00:00
|
|
|
if (supported_mode == MODE_UNKNOWN)
|
|
|
|
/* by default this should be initiator */
|
|
|
|
supported_mode = MODE_INITIATOR;
|
|
|
|
|
|
|
|
return show_shost_mode(supported_mode, buf);
|
2007-08-31 17:02:20 +00:00
|
|
|
}
|
|
|
|
|
2008-02-21 23:13:36 +00:00
|
|
|
static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL);
|
2007-08-31 17:02:20 +00:00
|
|
|
|
2008-02-21 23:13:36 +00:00
|
|
|
static ssize_t
|
|
|
|
show_shost_active_mode(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
2007-08-31 17:02:20 +00:00
|
|
|
{
|
2008-02-21 23:13:36 +00:00
|
|
|
struct Scsi_Host *shost = class_to_shost(dev);
|
2007-08-31 17:02:20 +00:00
|
|
|
|
|
|
|
if (shost->active_mode == MODE_UNKNOWN)
|
|
|
|
return snprintf(buf, 20, "unknown\n");
|
|
|
|
else
|
|
|
|
return show_shost_mode(shost->active_mode, buf);
|
|
|
|
}
|
|
|
|
|
2008-02-21 23:13:36 +00:00
|
|
|
static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL);
|
2007-08-31 17:02:20 +00:00
|
|
|
|
2011-08-12 09:51:28 +00:00
|
|
|
static int check_reset_type(char *str)
|
|
|
|
{
|
|
|
|
if (strncmp(str, "adapter", 10) == 0)
|
|
|
|
return SCSI_ADAPTER_RESET;
|
|
|
|
else if (strncmp(str, "firmware", 10) == 0)
|
|
|
|
return SCSI_FIRMWARE_RESET;
|
|
|
|
else
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t
|
|
|
|
store_host_reset(struct device *dev, struct device_attribute *attr,
|
|
|
|
const char *buf, size_t count)
|
|
|
|
{
|
|
|
|
struct Scsi_Host *shost = class_to_shost(dev);
|
|
|
|
struct scsi_host_template *sht = shost->hostt;
|
|
|
|
int ret = -EINVAL;
|
|
|
|
char str[10];
|
|
|
|
int type;
|
|
|
|
|
|
|
|
sscanf(buf, "%s", str);
|
|
|
|
type = check_reset_type(str);
|
|
|
|
|
|
|
|
if (!type)
|
|
|
|
goto exit_store_host_reset;
|
|
|
|
|
|
|
|
if (sht->host_reset)
|
|
|
|
ret = sht->host_reset(shost, type);
|
|
|
|
|
|
|
|
exit_store_host_reset:
|
|
|
|
if (ret == 0)
|
|
|
|
ret = count;
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset);
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
shost_rd_attr(unique_id, "%u\n");
|
|
|
|
shost_rd_attr(host_busy, "%hu\n");
|
|
|
|
shost_rd_attr(cmd_per_lun, "%hd\n");
|
2006-10-16 15:06:27 +00:00
|
|
|
shost_rd_attr(can_queue, "%hd\n");
|
2005-04-16 22:20:36 +00:00
|
|
|
shost_rd_attr(sg_tablesize, "%hu\n");
|
2010-09-10 18:50:10 +00:00
|
|
|
shost_rd_attr(sg_prot_tablesize, "%hu\n");
|
2005-04-16 22:20:36 +00:00
|
|
|
shost_rd_attr(unchecked_isa_dma, "%d\n");
|
2008-07-17 08:28:30 +00:00
|
|
|
shost_rd_attr(prot_capabilities, "%u\n");
|
|
|
|
shost_rd_attr(prot_guard_type, "%hd\n");
|
2005-04-16 22:20:36 +00:00
|
|
|
shost_rd_attr2(proc_name, hostt->proc_name, "%s\n");
|
|
|
|
|
2008-03-18 13:32:28 +00:00
|
|
|
static struct attribute *scsi_sysfs_shost_attrs[] = {
|
|
|
|
&dev_attr_unique_id.attr,
|
|
|
|
&dev_attr_host_busy.attr,
|
|
|
|
&dev_attr_cmd_per_lun.attr,
|
|
|
|
&dev_attr_can_queue.attr,
|
|
|
|
&dev_attr_sg_tablesize.attr,
|
2010-09-10 18:50:10 +00:00
|
|
|
&dev_attr_sg_prot_tablesize.attr,
|
2008-03-18 13:32:28 +00:00
|
|
|
&dev_attr_unchecked_isa_dma.attr,
|
|
|
|
&dev_attr_proc_name.attr,
|
|
|
|
&dev_attr_scan.attr,
|
|
|
|
&dev_attr_hstate.attr,
|
|
|
|
&dev_attr_supported_mode.attr,
|
|
|
|
&dev_attr_active_mode.attr,
|
2008-07-17 08:28:30 +00:00
|
|
|
&dev_attr_prot_capabilities.attr,
|
|
|
|
&dev_attr_prot_guard_type.attr,
|
2011-08-12 09:51:28 +00:00
|
|
|
&dev_attr_host_reset.attr,
|
2008-03-18 13:32:28 +00:00
|
|
|
NULL
|
|
|
|
};
|
|
|
|
|
|
|
|
struct attribute_group scsi_shost_attr_group = {
|
|
|
|
.attrs = scsi_sysfs_shost_attrs,
|
|
|
|
};
|
|
|
|
|
2009-06-24 17:06:31 +00:00
|
|
|
const struct attribute_group *scsi_sysfs_shost_attr_groups[] = {
|
2008-03-18 13:32:28 +00:00
|
|
|
&scsi_shost_attr_group,
|
2005-04-16 22:20:36 +00:00
|
|
|
NULL
|
|
|
|
};
|
|
|
|
|
2008-02-21 23:13:36 +00:00
|
|
|
static void scsi_device_cls_release(struct device *class_dev)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
struct scsi_device *sdev;
|
|
|
|
|
|
|
|
sdev = class_to_sdev(class_dev);
|
|
|
|
put_device(&sdev->sdev_gendev);
|
|
|
|
}
|
|
|
|
|
2006-11-22 14:55:48 +00:00
|
|
|
static void scsi_device_dev_release_usercontext(struct work_struct *work)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
struct scsi_device *sdev;
|
|
|
|
struct device *parent;
|
|
|
|
struct scsi_target *starget;
|
2007-10-29 21:15:22 +00:00
|
|
|
struct list_head *this, *tmp;
|
2005-04-16 22:20:36 +00:00
|
|
|
unsigned long flags;
|
|
|
|
|
2006-11-22 14:55:48 +00:00
|
|
|
sdev = container_of(work, struct scsi_device, ew.work);
|
|
|
|
|
|
|
|
parent = sdev->sdev_gendev.parent;
|
2005-04-16 22:20:36 +00:00
|
|
|
starget = to_scsi_target(parent);
|
|
|
|
|
|
|
|
spin_lock_irqsave(sdev->host->host_lock, flags);
|
|
|
|
starget->reap_ref++;
|
|
|
|
list_del(&sdev->siblings);
|
|
|
|
list_del(&sdev->same_target_siblings);
|
|
|
|
list_del(&sdev->starved_entry);
|
|
|
|
spin_unlock_irqrestore(sdev->host->host_lock, flags);
|
|
|
|
|
2007-10-29 21:15:22 +00:00
|
|
|
cancel_work_sync(&sdev->event_work);
|
|
|
|
|
|
|
|
list_for_each_safe(this, tmp, &sdev->event_list) {
|
|
|
|
struct scsi_event *evt;
|
|
|
|
|
|
|
|
evt = list_entry(this, struct scsi_event, node);
|
|
|
|
list_del(&evt->node);
|
|
|
|
kfree(evt);
|
|
|
|
}
|
|
|
|
|
2011-05-25 20:52:14 +00:00
|
|
|
blk_put_queue(sdev->request_queue);
|
2011-04-22 15:39:59 +00:00
|
|
|
/* NULL queue means the device can't be used */
|
|
|
|
sdev->request_queue = NULL;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
scsi_target_reap(scsi_target(sdev));
|
|
|
|
|
|
|
|
kfree(sdev->inquiry);
|
|
|
|
kfree(sdev);
|
|
|
|
|
|
|
|
if (parent)
|
|
|
|
put_device(parent);
|
|
|
|
}
|
|
|
|
|
2006-02-14 16:48:46 +00:00
|
|
|
static void scsi_device_dev_release(struct device *dev)
|
|
|
|
{
|
2006-02-23 20:27:18 +00:00
|
|
|
struct scsi_device *sdp = to_scsi_device(dev);
|
2006-11-22 14:55:48 +00:00
|
|
|
execute_in_process_context(scsi_device_dev_release_usercontext,
|
2006-02-23 20:27:18 +00:00
|
|
|
&sdp->ew);
|
2006-02-14 16:48:46 +00:00
|
|
|
}
|
|
|
|
|
2005-06-24 05:05:33 +00:00
|
|
|
static struct class sdev_class = {
|
2005-04-16 22:20:36 +00:00
|
|
|
.name = "scsi_device",
|
2008-02-21 23:13:36 +00:00
|
|
|
.dev_release = scsi_device_cls_release,
|
2005-04-16 22:20:36 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
/* all probing is done in the individual ->probe routines */
|
|
|
|
static int scsi_bus_match(struct device *dev, struct device_driver *gendrv)
|
|
|
|
{
|
2008-03-18 13:32:28 +00:00
|
|
|
struct scsi_device *sdp;
|
|
|
|
|
|
|
|
if (dev->type != &scsi_dev_type)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
sdp = to_scsi_device(dev);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (sdp->no_uld_attach)
|
|
|
|
return 0;
|
|
|
|
return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0;
|
|
|
|
}
|
|
|
|
|
2007-08-14 13:15:12 +00:00
|
|
|
static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
|
[SCSI] modalias for scsi devices
The following patch adds support for sysfs/uevent modalias
attribute for scsi devices (like disks, tapes, cdroms etc),
based on whatever current sd.c, sr.c, st.c and osst.c drivers
supports.
The modalias format is like this:
scsi:type-0x04
(for TYPE_WORM, handled by sr.c now).
Several comments.
o This hexadecimal type value is because all TYPE_XXX constants
in include/scsi/scsi.h are given in hex, but __stringify() will
not convert them to decimal (so it will NOT be scsi:type-4).
Since it does not really matter in which format it is, while
both modalias in module and modalias attribute match each other,
I descided to go for that 0x%02x format (and added a comment in
include/scsi/scsi.h to keep them that way), instead of changing
them all to decimal.
o There was no .uevent routine for SCSI bus. It might be a good
idea to add some more ueven environment variables in there.
o osst.c driver handles tapes too, like st.c, but only SOME tapes.
With this setup, hotplug scripts (or whatever is used by the
user) will try to load both st and osst modules for all SCSI
tapes found, because both modules have scsi:type-0x01 alias).
It is not harmful, but one extra module is no good either.
It is possible to solve this, by exporting more info in
modalias attribute, including vendor and device identification
strings, so that modalias becomes something like
scsi:type-0x12:vendor-Adaptec LTD:device-OnStream Tape Drive
and having that, match for all 3 attributes, not only device
type. But oh well, vendor and device strings may be large,
and they do contain spaces and whatnot.
So I left them for now, awaiting for comments first.
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2006-10-27 12:02:37 +00:00
|
|
|
{
|
2008-05-22 11:34:41 +00:00
|
|
|
struct scsi_device *sdev;
|
|
|
|
|
|
|
|
if (dev->type != &scsi_dev_type)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
sdev = to_scsi_device(dev);
|
[SCSI] modalias for scsi devices
The following patch adds support for sysfs/uevent modalias
attribute for scsi devices (like disks, tapes, cdroms etc),
based on whatever current sd.c, sr.c, st.c and osst.c drivers
supports.
The modalias format is like this:
scsi:type-0x04
(for TYPE_WORM, handled by sr.c now).
Several comments.
o This hexadecimal type value is because all TYPE_XXX constants
in include/scsi/scsi.h are given in hex, but __stringify() will
not convert them to decimal (so it will NOT be scsi:type-4).
Since it does not really matter in which format it is, while
both modalias in module and modalias attribute match each other,
I descided to go for that 0x%02x format (and added a comment in
include/scsi/scsi.h to keep them that way), instead of changing
them all to decimal.
o There was no .uevent routine for SCSI bus. It might be a good
idea to add some more ueven environment variables in there.
o osst.c driver handles tapes too, like st.c, but only SOME tapes.
With this setup, hotplug scripts (or whatever is used by the
user) will try to load both st and osst modules for all SCSI
tapes found, because both modules have scsi:type-0x01 alias).
It is not harmful, but one extra module is no good either.
It is possible to solve this, by exporting more info in
modalias attribute, including vendor and device identification
strings, so that modalias becomes something like
scsi:type-0x12:vendor-Adaptec LTD:device-OnStream Tape Drive
and having that, match for all 3 attributes, not only device
type. But oh well, vendor and device strings may be large,
and they do contain spaces and whatnot.
So I left them for now, awaiting for comments first.
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2006-10-27 12:02:37 +00:00
|
|
|
|
2007-08-14 13:15:12 +00:00
|
|
|
add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type);
|
[SCSI] modalias for scsi devices
The following patch adds support for sysfs/uevent modalias
attribute for scsi devices (like disks, tapes, cdroms etc),
based on whatever current sd.c, sr.c, st.c and osst.c drivers
supports.
The modalias format is like this:
scsi:type-0x04
(for TYPE_WORM, handled by sr.c now).
Several comments.
o This hexadecimal type value is because all TYPE_XXX constants
in include/scsi/scsi.h are given in hex, but __stringify() will
not convert them to decimal (so it will NOT be scsi:type-4).
Since it does not really matter in which format it is, while
both modalias in module and modalias attribute match each other,
I descided to go for that 0x%02x format (and added a comment in
include/scsi/scsi.h to keep them that way), instead of changing
them all to decimal.
o There was no .uevent routine for SCSI bus. It might be a good
idea to add some more ueven environment variables in there.
o osst.c driver handles tapes too, like st.c, but only SOME tapes.
With this setup, hotplug scripts (or whatever is used by the
user) will try to load both st and osst modules for all SCSI
tapes found, because both modules have scsi:type-0x01 alias).
It is not harmful, but one extra module is no good either.
It is possible to solve this, by exporting more info in
modalias attribute, including vendor and device identification
strings, so that modalias becomes something like
scsi:type-0x12:vendor-Adaptec LTD:device-OnStream Tape Drive
and having that, match for all 3 attributes, not only device
type. But oh well, vendor and device strings may be large,
and they do contain spaces and whatnot.
So I left them for now, awaiting for comments first.
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2006-10-27 12:02:37 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
struct bus_type scsi_bus_type = {
|
|
|
|
.name = "scsi",
|
|
|
|
.match = scsi_bus_match,
|
[SCSI] modalias for scsi devices
The following patch adds support for sysfs/uevent modalias
attribute for scsi devices (like disks, tapes, cdroms etc),
based on whatever current sd.c, sr.c, st.c and osst.c drivers
supports.
The modalias format is like this:
scsi:type-0x04
(for TYPE_WORM, handled by sr.c now).
Several comments.
o This hexadecimal type value is because all TYPE_XXX constants
in include/scsi/scsi.h are given in hex, but __stringify() will
not convert them to decimal (so it will NOT be scsi:type-4).
Since it does not really matter in which format it is, while
both modalias in module and modalias attribute match each other,
I descided to go for that 0x%02x format (and added a comment in
include/scsi/scsi.h to keep them that way), instead of changing
them all to decimal.
o There was no .uevent routine for SCSI bus. It might be a good
idea to add some more ueven environment variables in there.
o osst.c driver handles tapes too, like st.c, but only SOME tapes.
With this setup, hotplug scripts (or whatever is used by the
user) will try to load both st and osst modules for all SCSI
tapes found, because both modules have scsi:type-0x01 alias).
It is not harmful, but one extra module is no good either.
It is possible to solve this, by exporting more info in
modalias attribute, including vendor and device identification
strings, so that modalias becomes something like
scsi:type-0x12:vendor-Adaptec LTD:device-OnStream Tape Drive
and having that, match for all 3 attributes, not only device
type. But oh well, vendor and device strings may be large,
and they do contain spaces and whatnot.
So I left them for now, awaiting for comments first.
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2006-10-27 12:02:37 +00:00
|
|
|
.uevent = scsi_bus_uevent,
|
2011-02-10 23:06:54 +00:00
|
|
|
#ifdef CONFIG_PM
|
2010-06-17 14:36:49 +00:00
|
|
|
.pm = &scsi_bus_pm_ops,
|
2010-08-05 17:17:10 +00:00
|
|
|
#endif
|
2005-04-16 22:20:36 +00:00
|
|
|
};
|
2008-05-01 21:49:46 +00:00
|
|
|
EXPORT_SYMBOL_GPL(scsi_bus_type);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
int scsi_sysfs_register(void)
|
|
|
|
{
|
|
|
|
int error;
|
|
|
|
|
|
|
|
error = bus_register(&scsi_bus_type);
|
|
|
|
if (!error) {
|
|
|
|
error = class_register(&sdev_class);
|
|
|
|
if (error)
|
|
|
|
bus_unregister(&scsi_bus_type);
|
|
|
|
}
|
|
|
|
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
void scsi_sysfs_unregister(void)
|
|
|
|
{
|
|
|
|
class_unregister(&sdev_class);
|
|
|
|
bus_unregister(&scsi_bus_type);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* sdev_show_function: macro to create an attr function that can be used to
|
|
|
|
* show a non-bit field.
|
|
|
|
*/
|
|
|
|
#define sdev_show_function(field, format_string) \
|
|
|
|
static ssize_t \
|
2008-02-21 23:13:36 +00:00
|
|
|
sdev_show_##field (struct device *dev, struct device_attribute *attr, \
|
|
|
|
char *buf) \
|
2005-04-16 22:20:36 +00:00
|
|
|
{ \
|
|
|
|
struct scsi_device *sdev; \
|
|
|
|
sdev = to_scsi_device(dev); \
|
|
|
|
return snprintf (buf, 20, format_string, sdev->field); \
|
|
|
|
} \
|
|
|
|
|
|
|
|
/*
|
|
|
|
* sdev_rd_attr: macro to create a function and attribute variable for a
|
|
|
|
* read only field.
|
|
|
|
*/
|
|
|
|
#define sdev_rd_attr(field, format_string) \
|
|
|
|
sdev_show_function(field, format_string) \
|
|
|
|
static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL);
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
2010-04-14 06:15:14 +00:00
|
|
|
* sdev_rw_attr: create a function and attribute variable for a
|
2005-04-16 22:20:36 +00:00
|
|
|
* read/write field.
|
|
|
|
*/
|
|
|
|
#define sdev_rw_attr(field, format_string) \
|
|
|
|
sdev_show_function(field, format_string) \
|
|
|
|
\
|
|
|
|
static ssize_t \
|
2008-02-21 23:13:36 +00:00
|
|
|
sdev_store_##field (struct device *dev, struct device_attribute *attr, \
|
|
|
|
const char *buf, size_t count) \
|
2005-04-16 22:20:36 +00:00
|
|
|
{ \
|
|
|
|
struct scsi_device *sdev; \
|
|
|
|
sdev = to_scsi_device(dev); \
|
2010-04-14 06:15:14 +00:00
|
|
|
sscanf (buf, format_string, &sdev->field); \
|
2005-04-16 22:20:36 +00:00
|
|
|
return count; \
|
|
|
|
} \
|
|
|
|
static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
|
|
|
|
|
|
|
|
/* Currently we don't export bit fields, but we might in future,
|
|
|
|
* so leave this code in */
|
|
|
|
#if 0
|
|
|
|
/*
|
|
|
|
* sdev_rd_attr: create a function and attribute variable for a
|
|
|
|
* read/write bit field.
|
|
|
|
*/
|
|
|
|
#define sdev_rw_attr_bit(field) \
|
|
|
|
sdev_show_function(field, "%d\n") \
|
|
|
|
\
|
|
|
|
static ssize_t \
|
2008-02-21 23:13:36 +00:00
|
|
|
sdev_store_##field (struct device *dev, struct device_attribute *attr, \
|
|
|
|
const char *buf, size_t count) \
|
2005-04-16 22:20:36 +00:00
|
|
|
{ \
|
|
|
|
int ret; \
|
|
|
|
struct scsi_device *sdev; \
|
|
|
|
ret = scsi_sdev_check_buf_bit(buf); \
|
|
|
|
if (ret >= 0) { \
|
|
|
|
sdev = to_scsi_device(dev); \
|
|
|
|
sdev->field = ret; \
|
|
|
|
ret = count; \
|
|
|
|
} \
|
|
|
|
return ret; \
|
|
|
|
} \
|
|
|
|
static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1",
|
|
|
|
* else return -EINVAL.
|
|
|
|
*/
|
|
|
|
static int scsi_sdev_check_buf_bit(const char *buf)
|
|
|
|
{
|
|
|
|
if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
|
|
|
|
if (buf[0] == '1')
|
|
|
|
return 1;
|
|
|
|
else if (buf[0] == '0')
|
|
|
|
return 0;
|
|
|
|
else
|
|
|
|
return -EINVAL;
|
|
|
|
} else
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
/*
|
|
|
|
* Create the actual show/store functions and data structures.
|
|
|
|
*/
|
|
|
|
sdev_rd_attr (device_blocked, "%d\n");
|
|
|
|
sdev_rd_attr (queue_depth, "%d\n");
|
|
|
|
sdev_rd_attr (type, "%d\n");
|
|
|
|
sdev_rd_attr (scsi_level, "%d\n");
|
|
|
|
sdev_rd_attr (vendor, "%.8s\n");
|
|
|
|
sdev_rd_attr (model, "%.16s\n");
|
|
|
|
sdev_rd_attr (rev, "%.4s\n");
|
|
|
|
|
2008-09-14 12:55:09 +00:00
|
|
|
/*
|
|
|
|
* TODO: can we make these symlinks to the block layer ones?
|
|
|
|
*/
|
2005-04-16 22:20:36 +00:00
|
|
|
static ssize_t
|
2005-05-17 10:43:37 +00:00
|
|
|
sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
struct scsi_device *sdev;
|
|
|
|
sdev = to_scsi_device(dev);
|
2008-09-14 12:55:09 +00:00
|
|
|
return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t
|
2008-02-21 23:13:36 +00:00
|
|
|
sdev_store_timeout (struct device *dev, struct device_attribute *attr,
|
|
|
|
const char *buf, size_t count)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
struct scsi_device *sdev;
|
|
|
|
int timeout;
|
|
|
|
sdev = to_scsi_device(dev);
|
|
|
|
sscanf (buf, "%d\n", &timeout);
|
2008-09-14 12:55:09 +00:00
|
|
|
blk_queue_rq_timeout(sdev->request_queue, timeout * HZ);
|
2005-04-16 22:20:36 +00:00
|
|
|
return count;
|
|
|
|
}
|
|
|
|
static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout);
|
|
|
|
|
|
|
|
static ssize_t
|
2008-02-21 23:13:36 +00:00
|
|
|
store_rescan_field (struct device *dev, struct device_attribute *attr,
|
|
|
|
const char *buf, size_t count)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
scsi_rescan_device(dev);
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field);
|
|
|
|
|
2007-03-15 19:50:34 +00:00
|
|
|
static void sdev_store_delete_callback(struct device *dev)
|
|
|
|
{
|
|
|
|
scsi_remove_device(to_scsi_device(dev));
|
|
|
|
}
|
|
|
|
|
2008-02-21 23:13:36 +00:00
|
|
|
static ssize_t
|
|
|
|
sdev_store_delete(struct device *dev, struct device_attribute *attr,
|
|
|
|
const char *buf, size_t count)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2007-03-15 19:50:34 +00:00
|
|
|
int rc;
|
|
|
|
|
|
|
|
/* An attribute cannot be unregistered by one of its own methods,
|
|
|
|
* so we have to use this roundabout approach.
|
|
|
|
*/
|
|
|
|
rc = device_schedule_callback(dev, sdev_store_delete_callback);
|
|
|
|
if (rc)
|
|
|
|
count = rc;
|
2005-04-16 22:20:36 +00:00
|
|
|
return count;
|
|
|
|
};
|
|
|
|
static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
|
|
|
|
|
|
|
|
static ssize_t
|
2008-02-21 23:13:36 +00:00
|
|
|
store_state_field(struct device *dev, struct device_attribute *attr,
|
|
|
|
const char *buf, size_t count)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
int i;
|
|
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
|
|
enum scsi_device_state state = 0;
|
|
|
|
|
2006-06-09 05:23:48 +00:00
|
|
|
for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
|
2005-04-16 22:20:36 +00:00
|
|
|
const int len = strlen(sdev_states[i].name);
|
|
|
|
if (strncmp(sdev_states[i].name, buf, len) == 0 &&
|
|
|
|
buf[len] == '\n') {
|
|
|
|
state = sdev_states[i].value;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (!state)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (scsi_device_set_state(sdev, state))
|
|
|
|
return -EINVAL;
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t
|
2005-05-17 10:43:37 +00:00
|
|
|
show_state_field(struct device *dev, struct device_attribute *attr, char *buf)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
|
|
const char *name = scsi_device_state_name(sdev->sdev_state);
|
|
|
|
|
|
|
|
if (!name)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
return snprintf(buf, 20, "%s\n", name);
|
|
|
|
}
|
|
|
|
|
|
|
|
static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field);
|
|
|
|
|
|
|
|
static ssize_t
|
2008-02-21 23:13:36 +00:00
|
|
|
show_queue_type_field(struct device *dev, struct device_attribute *attr,
|
|
|
|
char *buf)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
|
|
const char *name = "none";
|
|
|
|
|
|
|
|
if (sdev->ordered_tags)
|
|
|
|
name = "ordered";
|
|
|
|
else if (sdev->simple_tags)
|
|
|
|
name = "simple";
|
|
|
|
|
|
|
|
return snprintf(buf, 20, "%s\n", name);
|
|
|
|
}
|
|
|
|
|
|
|
|
static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL);
|
|
|
|
|
|
|
|
static ssize_t
|
2008-02-21 23:13:36 +00:00
|
|
|
show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8);
|
|
|
|
}
|
|
|
|
|
|
|
|
static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL);
|
|
|
|
|
|
|
|
#define show_sdev_iostat(field) \
|
|
|
|
static ssize_t \
|
2008-02-21 23:13:36 +00:00
|
|
|
show_iostat_##field(struct device *dev, struct device_attribute *attr, \
|
|
|
|
char *buf) \
|
2005-04-16 22:20:36 +00:00
|
|
|
{ \
|
|
|
|
struct scsi_device *sdev = to_scsi_device(dev); \
|
|
|
|
unsigned long long count = atomic_read(&sdev->field); \
|
|
|
|
return snprintf(buf, 20, "0x%llx\n", count); \
|
|
|
|
} \
|
|
|
|
static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
|
|
|
|
|
|
|
|
show_sdev_iostat(iorequest_cnt);
|
|
|
|
show_sdev_iostat(iodone_cnt);
|
|
|
|
show_sdev_iostat(ioerr_cnt);
|
|
|
|
|
[SCSI] modalias for scsi devices
The following patch adds support for sysfs/uevent modalias
attribute for scsi devices (like disks, tapes, cdroms etc),
based on whatever current sd.c, sr.c, st.c and osst.c drivers
supports.
The modalias format is like this:
scsi:type-0x04
(for TYPE_WORM, handled by sr.c now).
Several comments.
o This hexadecimal type value is because all TYPE_XXX constants
in include/scsi/scsi.h are given in hex, but __stringify() will
not convert them to decimal (so it will NOT be scsi:type-4).
Since it does not really matter in which format it is, while
both modalias in module and modalias attribute match each other,
I descided to go for that 0x%02x format (and added a comment in
include/scsi/scsi.h to keep them that way), instead of changing
them all to decimal.
o There was no .uevent routine for SCSI bus. It might be a good
idea to add some more ueven environment variables in there.
o osst.c driver handles tapes too, like st.c, but only SOME tapes.
With this setup, hotplug scripts (or whatever is used by the
user) will try to load both st and osst modules for all SCSI
tapes found, because both modules have scsi:type-0x01 alias).
It is not harmful, but one extra module is no good either.
It is possible to solve this, by exporting more info in
modalias attribute, including vendor and device identification
strings, so that modalias becomes something like
scsi:type-0x12:vendor-Adaptec LTD:device-OnStream Tape Drive
and having that, match for all 3 attributes, not only device
type. But oh well, vendor and device strings may be large,
and they do contain spaces and whatnot.
So I left them for now, awaiting for comments first.
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2006-10-27 12:02:37 +00:00
|
|
|
static ssize_t
|
|
|
|
sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
struct scsi_device *sdev;
|
|
|
|
sdev = to_scsi_device(dev);
|
|
|
|
return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type);
|
|
|
|
}
|
|
|
|
static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-10-29 21:15:22 +00:00
|
|
|
#define DECLARE_EVT_SHOW(name, Cap_name) \
|
|
|
|
static ssize_t \
|
|
|
|
sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \
|
2008-02-21 23:13:36 +00:00
|
|
|
char *buf) \
|
2007-10-29 21:15:22 +00:00
|
|
|
{ \
|
|
|
|
struct scsi_device *sdev = to_scsi_device(dev); \
|
|
|
|
int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\
|
|
|
|
return snprintf(buf, 20, "%d\n", val); \
|
|
|
|
}
|
|
|
|
|
|
|
|
#define DECLARE_EVT_STORE(name, Cap_name) \
|
|
|
|
static ssize_t \
|
2008-02-21 23:13:36 +00:00
|
|
|
sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\
|
2007-10-29 21:15:22 +00:00
|
|
|
const char *buf, size_t count) \
|
|
|
|
{ \
|
|
|
|
struct scsi_device *sdev = to_scsi_device(dev); \
|
|
|
|
int val = simple_strtoul(buf, NULL, 0); \
|
|
|
|
if (val == 0) \
|
|
|
|
clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
|
|
|
|
else if (val == 1) \
|
|
|
|
set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
|
|
|
|
else \
|
|
|
|
return -EINVAL; \
|
|
|
|
return count; \
|
|
|
|
}
|
|
|
|
|
|
|
|
#define DECLARE_EVT(name, Cap_name) \
|
|
|
|
DECLARE_EVT_SHOW(name, Cap_name) \
|
|
|
|
DECLARE_EVT_STORE(name, Cap_name) \
|
|
|
|
static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \
|
|
|
|
sdev_store_evt_##name);
|
|
|
|
#define REF_EVT(name) &dev_attr_evt_##name.attr
|
|
|
|
|
|
|
|
DECLARE_EVT(media_change, MEDIA_CHANGE)
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
/* Default template for device attributes. May NOT be modified */
|
2007-09-11 15:00:14 +00:00
|
|
|
static struct attribute *scsi_sdev_attrs[] = {
|
|
|
|
&dev_attr_device_blocked.attr,
|
|
|
|
&dev_attr_type.attr,
|
|
|
|
&dev_attr_scsi_level.attr,
|
|
|
|
&dev_attr_vendor.attr,
|
|
|
|
&dev_attr_model.attr,
|
|
|
|
&dev_attr_rev.attr,
|
|
|
|
&dev_attr_rescan.attr,
|
|
|
|
&dev_attr_delete.attr,
|
|
|
|
&dev_attr_state.attr,
|
|
|
|
&dev_attr_timeout.attr,
|
|
|
|
&dev_attr_iocounterbits.attr,
|
|
|
|
&dev_attr_iorequest_cnt.attr,
|
|
|
|
&dev_attr_iodone_cnt.attr,
|
|
|
|
&dev_attr_ioerr_cnt.attr,
|
|
|
|
&dev_attr_modalias.attr,
|
2007-10-29 21:15:22 +00:00
|
|
|
REF_EVT(media_change),
|
2007-09-11 15:00:14 +00:00
|
|
|
NULL
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct attribute_group scsi_sdev_attr_group = {
|
|
|
|
.attrs = scsi_sdev_attrs,
|
|
|
|
};
|
|
|
|
|
2009-06-24 17:06:31 +00:00
|
|
|
static const struct attribute_group *scsi_sdev_attr_groups[] = {
|
2007-09-11 15:00:14 +00:00
|
|
|
&scsi_sdev_attr_group,
|
2005-04-16 22:20:36 +00:00
|
|
|
NULL
|
|
|
|
};
|
|
|
|
|
2008-02-21 23:13:36 +00:00
|
|
|
static ssize_t
|
|
|
|
sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr,
|
|
|
|
const char *buf, size_t count)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
int depth, retval;
|
|
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
|
|
struct scsi_host_template *sht = sdev->host->hostt;
|
|
|
|
|
|
|
|
if (!sht->change_queue_depth)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
depth = simple_strtoul(buf, NULL, 0);
|
|
|
|
|
|
|
|
if (depth < 1)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2009-10-16 00:46:39 +00:00
|
|
|
retval = sht->change_queue_depth(sdev, depth,
|
|
|
|
SCSI_QDEPTH_DEFAULT);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (retval < 0)
|
|
|
|
return retval;
|
|
|
|
|
2009-10-22 22:46:33 +00:00
|
|
|
sdev->max_queue_depth = sdev->queue_depth;
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct device_attribute sdev_attr_queue_depth_rw =
|
|
|
|
__ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth,
|
|
|
|
sdev_store_queue_depth_rw);
|
|
|
|
|
2009-10-22 22:46:33 +00:00
|
|
|
static ssize_t
|
|
|
|
sdev_show_queue_ramp_up_period(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
char *buf)
|
|
|
|
{
|
|
|
|
struct scsi_device *sdev;
|
|
|
|
sdev = to_scsi_device(dev);
|
|
|
|
return snprintf(buf, 20, "%u\n",
|
|
|
|
jiffies_to_msecs(sdev->queue_ramp_up_period));
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t
|
|
|
|
sdev_store_queue_ramp_up_period(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
const char *buf, size_t count)
|
|
|
|
{
|
|
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
|
|
unsigned long period;
|
|
|
|
|
|
|
|
if (strict_strtoul(buf, 10, &period))
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
sdev->queue_ramp_up_period = msecs_to_jiffies(period);
|
|
|
|
return period;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct device_attribute sdev_attr_queue_ramp_up_period =
|
|
|
|
__ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR,
|
|
|
|
sdev_show_queue_ramp_up_period,
|
|
|
|
sdev_store_queue_ramp_up_period);
|
|
|
|
|
2008-02-21 23:13:36 +00:00
|
|
|
static ssize_t
|
|
|
|
sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr,
|
|
|
|
const char *buf, size_t count)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
|
|
struct scsi_host_template *sht = sdev->host->hostt;
|
|
|
|
int tag_type = 0, retval;
|
|
|
|
int prev_tag_type = scsi_get_tag_type(sdev);
|
|
|
|
|
|
|
|
if (!sdev->tagged_supported || !sht->change_queue_type)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (strncmp(buf, "ordered", 7) == 0)
|
|
|
|
tag_type = MSG_ORDERED_TAG;
|
|
|
|
else if (strncmp(buf, "simple", 6) == 0)
|
|
|
|
tag_type = MSG_SIMPLE_TAG;
|
|
|
|
else if (strncmp(buf, "none", 4) != 0)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (tag_type == prev_tag_type)
|
|
|
|
return count;
|
|
|
|
|
|
|
|
retval = sht->change_queue_type(sdev, tag_type);
|
|
|
|
if (retval < 0)
|
|
|
|
return retval;
|
|
|
|
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
2008-03-23 03:42:27 +00:00
|
|
|
static int scsi_target_add(struct scsi_target *starget)
|
|
|
|
{
|
|
|
|
int error;
|
|
|
|
|
|
|
|
if (starget->state != STARGET_CREATED)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
error = device_add(&starget->dev);
|
|
|
|
if (error) {
|
|
|
|
dev_err(&starget->dev, "target device_add failed, error %d\n", error);
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
transport_add_device(&starget->dev);
|
|
|
|
starget->state = STARGET_RUNNING;
|
|
|
|
|
[SCSI] implement runtime Power Management
This patch (as1398b) adds runtime PM support to the SCSI layer. Only
the machanism is provided; use of it is up to the various high-level
drivers, and the patch doesn't change any of them. Except for sg --
the patch expicitly prevents a device from being runtime-suspended
while its sg device file is open.
The implementation is simplistic. In general, hosts and targets are
automatically suspended when all their children are asleep, but for
them the runtime-suspend code doesn't actually do anything. (A host's
runtime PM status is propagated up the device tree, though, so a
runtime-PM-aware lower-level driver could power down the host adapter
hardware at the appropriate times.) There are comments indicating
where a transport class might be notified or some other hooks added.
LUNs are runtime-suspended by calling the drivers' existing suspend
handlers (and likewise for runtime-resume). Somewhat arbitrarily, the
implementation delays for 100 ms before suspending an eligible LUN.
This is because there typically are occasions during bootup when the
same device file is opened and closed several times in quick
succession.
The way this all works is that the SCSI core increments a device's
PM-usage count when it is registered. If a high-level driver does
nothing then the device will not be eligible for runtime-suspend
because of the elevated usage count. If a high-level driver wants to
use runtime PM then it can call scsi_autopm_put_device() in its probe
routine to decrement the usage count and scsi_autopm_get_device() in
its remove routine to restore the original count.
Hosts, targets, and LUNs are not suspended while they are being probed
or removed, or while the error handler is running. In fact, a fairly
large part of the patch consists of code to make sure that things
aren't suspended at such times.
[jejb: fix up compile issues in PM config variations]
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-06-17 14:41:42 +00:00
|
|
|
pm_runtime_set_active(&starget->dev);
|
|
|
|
pm_runtime_enable(&starget->dev);
|
|
|
|
device_enable_async_suspend(&starget->dev);
|
|
|
|
|
2008-03-23 03:42:27 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
static struct device_attribute sdev_attr_queue_type_rw =
|
|
|
|
__ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field,
|
|
|
|
sdev_store_queue_type_rw);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* scsi_sysfs_add_sdev - add scsi device to sysfs
|
|
|
|
* @sdev: scsi_device to add
|
|
|
|
*
|
|
|
|
* Return value:
|
|
|
|
* 0 on Success / non-zero on Failure
|
|
|
|
**/
|
|
|
|
int scsi_sysfs_add_sdev(struct scsi_device *sdev)
|
|
|
|
{
|
|
|
|
int error, i;
|
2007-07-19 15:15:10 +00:00
|
|
|
struct request_queue *rq = sdev->request_queue;
|
2008-03-23 03:42:27 +00:00
|
|
|
struct scsi_target *starget = sdev->sdev_target;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2010-02-12 17:13:55 +00:00
|
|
|
error = scsi_device_set_state(sdev, SDEV_RUNNING);
|
|
|
|
if (error)
|
2005-04-16 22:20:36 +00:00
|
|
|
return error;
|
|
|
|
|
2008-03-23 03:42:27 +00:00
|
|
|
error = scsi_target_add(starget);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
|
|
|
|
transport_configure_device(&starget->dev);
|
[SCSI] implement runtime Power Management
This patch (as1398b) adds runtime PM support to the SCSI layer. Only
the machanism is provided; use of it is up to the various high-level
drivers, and the patch doesn't change any of them. Except for sg --
the patch expicitly prevents a device from being runtime-suspended
while its sg device file is open.
The implementation is simplistic. In general, hosts and targets are
automatically suspended when all their children are asleep, but for
them the runtime-suspend code doesn't actually do anything. (A host's
runtime PM status is propagated up the device tree, though, so a
runtime-PM-aware lower-level driver could power down the host adapter
hardware at the appropriate times.) There are comments indicating
where a transport class might be notified or some other hooks added.
LUNs are runtime-suspended by calling the drivers' existing suspend
handlers (and likewise for runtime-resume). Somewhat arbitrarily, the
implementation delays for 100 ms before suspending an eligible LUN.
This is because there typically are occasions during bootup when the
same device file is opened and closed several times in quick
succession.
The way this all works is that the SCSI core increments a device's
PM-usage count when it is registered. If a high-level driver does
nothing then the device will not be eligible for runtime-suspend
because of the elevated usage count. If a high-level driver wants to
use runtime PM then it can call scsi_autopm_put_device() in its probe
routine to decrement the usage count and scsi_autopm_get_device() in
its remove routine to restore the original count.
Hosts, targets, and LUNs are not suspended while they are being probed
or removed, or while the error handler is running. In fact, a fairly
large part of the patch consists of code to make sure that things
aren't suspended at such times.
[jejb: fix up compile issues in PM config variations]
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-06-17 14:41:42 +00:00
|
|
|
|
2010-02-08 18:18:26 +00:00
|
|
|
device_enable_async_suspend(&sdev->sdev_gendev);
|
[SCSI] implement runtime Power Management
This patch (as1398b) adds runtime PM support to the SCSI layer. Only
the machanism is provided; use of it is up to the various high-level
drivers, and the patch doesn't change any of them. Except for sg --
the patch expicitly prevents a device from being runtime-suspended
while its sg device file is open.
The implementation is simplistic. In general, hosts and targets are
automatically suspended when all their children are asleep, but for
them the runtime-suspend code doesn't actually do anything. (A host's
runtime PM status is propagated up the device tree, though, so a
runtime-PM-aware lower-level driver could power down the host adapter
hardware at the appropriate times.) There are comments indicating
where a transport class might be notified or some other hooks added.
LUNs are runtime-suspended by calling the drivers' existing suspend
handlers (and likewise for runtime-resume). Somewhat arbitrarily, the
implementation delays for 100 ms before suspending an eligible LUN.
This is because there typically are occasions during bootup when the
same device file is opened and closed several times in quick
succession.
The way this all works is that the SCSI core increments a device's
PM-usage count when it is registered. If a high-level driver does
nothing then the device will not be eligible for runtime-suspend
because of the elevated usage count. If a high-level driver wants to
use runtime PM then it can call scsi_autopm_put_device() in its probe
routine to decrement the usage count and scsi_autopm_get_device() in
its remove routine to restore the original count.
Hosts, targets, and LUNs are not suspended while they are being probed
or removed, or while the error handler is running. In fact, a fairly
large part of the patch consists of code to make sure that things
aren't suspended at such times.
[jejb: fix up compile issues in PM config variations]
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-06-17 14:41:42 +00:00
|
|
|
scsi_autopm_get_target(starget);
|
|
|
|
pm_runtime_set_active(&sdev->sdev_gendev);
|
|
|
|
pm_runtime_forbid(&sdev->sdev_gendev);
|
|
|
|
pm_runtime_enable(&sdev->sdev_gendev);
|
|
|
|
scsi_autopm_put_target(starget);
|
|
|
|
|
|
|
|
/* The following call will keep sdev active indefinitely, until
|
|
|
|
* its driver does a corresponding scsi_autopm_pm_device(). Only
|
|
|
|
* drivers supporting autosuspend will do this.
|
|
|
|
*/
|
|
|
|
scsi_autopm_get_device(sdev);
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
error = device_add(&sdev->sdev_gendev);
|
|
|
|
if (error) {
|
2010-11-15 21:03:04 +00:00
|
|
|
sdev_printk(KERN_INFO, sdev,
|
|
|
|
"failed to add device: %d\n", error);
|
2010-02-12 17:13:55 +00:00
|
|
|
return error;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
2010-02-08 18:18:26 +00:00
|
|
|
device_enable_async_suspend(&sdev->sdev_dev);
|
2008-02-21 23:13:36 +00:00
|
|
|
error = device_add(&sdev->sdev_dev);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (error) {
|
2010-11-15 21:03:04 +00:00
|
|
|
sdev_printk(KERN_INFO, sdev,
|
|
|
|
"failed to add class device: %d\n", error);
|
2009-11-19 22:48:29 +00:00
|
|
|
device_del(&sdev->sdev_gendev);
|
2010-02-12 17:13:55 +00:00
|
|
|
return error;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
2009-11-19 22:48:29 +00:00
|
|
|
transport_add_device(&sdev->sdev_gendev);
|
|
|
|
sdev->is_visible = 1;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-09-11 15:00:14 +00:00
|
|
|
/* create queue files, which may be writable, depending on the host */
|
2009-10-22 22:46:33 +00:00
|
|
|
if (sdev->host->hostt->change_queue_depth) {
|
|
|
|
error = device_create_file(&sdev->sdev_gendev,
|
|
|
|
&sdev_attr_queue_depth_rw);
|
|
|
|
error = device_create_file(&sdev->sdev_gendev,
|
|
|
|
&sdev_attr_queue_ramp_up_period);
|
|
|
|
}
|
2007-09-11 15:00:14 +00:00
|
|
|
else
|
|
|
|
error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_depth);
|
2009-11-19 22:48:29 +00:00
|
|
|
if (error)
|
2010-02-12 17:13:55 +00:00
|
|
|
return error;
|
2009-11-19 22:48:29 +00:00
|
|
|
|
2007-09-11 15:00:14 +00:00
|
|
|
if (sdev->host->hostt->change_queue_type)
|
|
|
|
error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_type_rw);
|
|
|
|
else
|
|
|
|
error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_type);
|
2009-11-19 22:48:29 +00:00
|
|
|
if (error)
|
2010-02-12 17:13:55 +00:00
|
|
|
return error;
|
2007-09-11 15:00:14 +00:00
|
|
|
|
2008-04-18 15:43:14 +00:00
|
|
|
error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL);
|
2007-07-19 15:15:10 +00:00
|
|
|
|
|
|
|
if (error)
|
2009-11-19 22:48:29 +00:00
|
|
|
/* we're treating error on bsg register as non-fatal,
|
|
|
|
* so pretend nothing went wrong */
|
2007-07-19 15:15:10 +00:00
|
|
|
sdev_printk(KERN_INFO, sdev,
|
|
|
|
"Failed to register bsg queue, errno=%d\n", error);
|
|
|
|
|
2007-09-11 15:00:14 +00:00
|
|
|
/* add additional host specific attributes */
|
2005-04-16 22:20:36 +00:00
|
|
|
if (sdev->host->hostt->sdev_attrs) {
|
|
|
|
for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) {
|
2007-09-11 15:00:14 +00:00
|
|
|
error = device_create_file(&sdev->sdev_gendev,
|
2005-04-16 22:20:36 +00:00
|
|
|
sdev->host->hostt->sdev_attrs[i]);
|
2009-11-19 22:48:29 +00:00
|
|
|
if (error)
|
2010-02-12 17:13:55 +00:00
|
|
|
return error;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
2005-07-26 14:20:53 +00:00
|
|
|
void __scsi_remove_device(struct scsi_device *sdev)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2005-11-06 17:47:08 +00:00
|
|
|
struct device *dev = &sdev->sdev_gendev;
|
|
|
|
|
2009-11-19 22:48:29 +00:00
|
|
|
if (sdev->is_visible) {
|
|
|
|
if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0)
|
|
|
|
return;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2009-11-19 22:48:29 +00:00
|
|
|
bsg_unregister_queue(sdev->request_queue);
|
|
|
|
device_unregister(&sdev->sdev_dev);
|
|
|
|
transport_remove_device(dev);
|
|
|
|
device_del(dev);
|
|
|
|
} else
|
|
|
|
put_device(&sdev->sdev_dev);
|
2012-06-29 15:36:07 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Stop accepting new requests and wait until all queuecommand() and
|
|
|
|
* scsi_run_queue() invocations have finished before tearing down the
|
|
|
|
* device.
|
|
|
|
*/
|
2005-04-16 22:20:36 +00:00
|
|
|
scsi_device_set_state(sdev, SDEV_DEL);
|
2012-06-29 15:36:07 +00:00
|
|
|
blk_cleanup_queue(sdev->request_queue);
|
|
|
|
cancel_work_sync(&sdev->requeue_work);
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
if (sdev->host->hostt->slave_destroy)
|
|
|
|
sdev->host->hostt->slave_destroy(sdev);
|
2005-11-06 17:47:08 +00:00
|
|
|
transport_destroy_device(dev);
|
2011-04-22 15:39:59 +00:00
|
|
|
|
2005-11-06 17:47:08 +00:00
|
|
|
put_device(dev);
|
2005-07-26 14:20:53 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* scsi_remove_device - unregister a device from the scsi bus
|
|
|
|
* @sdev: scsi_device to unregister
|
|
|
|
**/
|
|
|
|
void scsi_remove_device(struct scsi_device *sdev)
|
|
|
|
{
|
2005-09-16 01:52:51 +00:00
|
|
|
struct Scsi_Host *shost = sdev->host;
|
|
|
|
|
2006-01-11 12:16:10 +00:00
|
|
|
mutex_lock(&shost->scan_mutex);
|
2005-07-26 14:20:53 +00:00
|
|
|
__scsi_remove_device(sdev);
|
2006-01-11 12:16:10 +00:00
|
|
|
mutex_unlock(&shost->scan_mutex);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(scsi_remove_device);
|
|
|
|
|
2007-07-09 18:59:59 +00:00
|
|
|
static void __scsi_remove_target(struct scsi_target *starget)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
|
|
|
|
unsigned long flags;
|
2005-07-26 14:27:10 +00:00
|
|
|
struct scsi_device *sdev;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
2005-07-26 14:27:10 +00:00
|
|
|
restart:
|
|
|
|
list_for_each_entry(sdev, &shost->__devices, siblings) {
|
2005-04-16 22:20:36 +00:00
|
|
|
if (sdev->channel != starget->channel ||
|
2005-07-26 14:27:10 +00:00
|
|
|
sdev->id != starget->id ||
|
[SCSI] Fix race when removing SCSI devices
Removing SCSI devices through
echo 1 > /sys/bus/scsi/devices/ ... /delete
while the FC transport class removes the SCSI target can lead to an
oops:
Unable to handle kernel pointer dereference at virtual kernel address 00000000b6815000
Oops: 0011 [#1] PREEMPT SMP DEBUG_PAGEALLOC
Modules linked in: sunrpc qeth_l3 binfmt_misc dm_multipath scsi_dh dm_mod ipv6 qeth ccwgroup [last unloaded: scsi_wait_scan]
CPU: 1 Not tainted 2.6.35.5-45.x.20100924-s390xdefault #1
Process fc_wq_0 (pid: 861, task: 00000000b7331240, ksp: 00000000b735bac0)
Krnl PSW : 0704200180000000 00000000003ff6e4 (__scsi_remove_device+0x24/0xd0)
R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:0 CC:2 PM:0 EA:3
Krnl GPRS: 0000000000000001 0000000000000000 00000000b6815000 00000000bc24a8c0
00000000003ff7c8 000000000056dbb8 0000000000000002 0000000000835d80
ffffffff00000000 0000000000001000 00000000b6815000 00000000bc24a7f0
00000000b68151a0 00000000b6815000 00000000b735bc20 00000000b735bbf8
Krnl Code: 00000000003ff6d6: a7840001 brc 8,3ff6d8
00000000003ff6da: a7fbffd8 aghi %r15,-40
00000000003ff6de: e3e0f0980024 stg %r14,152(%r15)
>00000000003ff6e4: e31021200004 lg %r1,288(%r2)
00000000003ff6ea: a71f0000 cghi %r1,0
00000000003ff6ee: a7a40011 brc 10,3ff710
00000000003ff6f2: a7390003 lghi %r3,3
00000000003ff6f6: c0e5ffffc8b1 brasl %r14,3f8858
Call Trace:
([<0000000000001000>] 0x1000)
[<00000000003ff7d2>] scsi_remove_device+0x42/0x54
[<00000000003ff8ba>] __scsi_remove_target+0xca/0xfc
[<00000000003ff99a>] __remove_child+0x3a/0x48
[<00000000003e3246>] device_for_each_child+0x72/0xbc
[<00000000003ff93a>] scsi_remove_target+0x4e/0x74
[<0000000000406586>] fc_rport_final_delete+0xb2/0x23c
[<000000000015d080>] worker_thread+0x200/0x344
[<000000000016330c>] kthread+0xa0/0xa8
[<0000000000106c1a>] kernel_thread_starter+0x6/0xc
[<0000000000106c14>] kernel_thread_starter+0x0/0xc
INFO: lockdep is turned off.
Last Breaking-Event-Address:
[<00000000003ff7cc>] scsi_remove_device+0x3c/0x54
The function __scsi_remove_target iterates through the SCSI devices on
the host, but it drops the host_lock before calling
scsi_remove_device. When the SCSI device is deleted from another
thread, the pointer to the SCSI device in scsi_remove_device can
become invalid. Fix this by getting a reference to the SCSI device
before dropping the host_lock to keep the SCSI device alive for the
call to scsi_remove_device.
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Cc: Stable Tree <stable@kernel.org>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-10-06 11:19:44 +00:00
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scsi_device_get(sdev))
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2005-04-16 22:20:36 +00:00
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continue;
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spin_unlock_irqrestore(shost->host_lock, flags);
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scsi_remove_device(sdev);
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[SCSI] Fix race when removing SCSI devices
Removing SCSI devices through
echo 1 > /sys/bus/scsi/devices/ ... /delete
while the FC transport class removes the SCSI target can lead to an
oops:
Unable to handle kernel pointer dereference at virtual kernel address 00000000b6815000
Oops: 0011 [#1] PREEMPT SMP DEBUG_PAGEALLOC
Modules linked in: sunrpc qeth_l3 binfmt_misc dm_multipath scsi_dh dm_mod ipv6 qeth ccwgroup [last unloaded: scsi_wait_scan]
CPU: 1 Not tainted 2.6.35.5-45.x.20100924-s390xdefault #1
Process fc_wq_0 (pid: 861, task: 00000000b7331240, ksp: 00000000b735bac0)
Krnl PSW : 0704200180000000 00000000003ff6e4 (__scsi_remove_device+0x24/0xd0)
R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:0 CC:2 PM:0 EA:3
Krnl GPRS: 0000000000000001 0000000000000000 00000000b6815000 00000000bc24a8c0
00000000003ff7c8 000000000056dbb8 0000000000000002 0000000000835d80
ffffffff00000000 0000000000001000 00000000b6815000 00000000bc24a7f0
00000000b68151a0 00000000b6815000 00000000b735bc20 00000000b735bbf8
Krnl Code: 00000000003ff6d6: a7840001 brc 8,3ff6d8
00000000003ff6da: a7fbffd8 aghi %r15,-40
00000000003ff6de: e3e0f0980024 stg %r14,152(%r15)
>00000000003ff6e4: e31021200004 lg %r1,288(%r2)
00000000003ff6ea: a71f0000 cghi %r1,0
00000000003ff6ee: a7a40011 brc 10,3ff710
00000000003ff6f2: a7390003 lghi %r3,3
00000000003ff6f6: c0e5ffffc8b1 brasl %r14,3f8858
Call Trace:
([<0000000000001000>] 0x1000)
[<00000000003ff7d2>] scsi_remove_device+0x42/0x54
[<00000000003ff8ba>] __scsi_remove_target+0xca/0xfc
[<00000000003ff99a>] __remove_child+0x3a/0x48
[<00000000003e3246>] device_for_each_child+0x72/0xbc
[<00000000003ff93a>] scsi_remove_target+0x4e/0x74
[<0000000000406586>] fc_rport_final_delete+0xb2/0x23c
[<000000000015d080>] worker_thread+0x200/0x344
[<000000000016330c>] kthread+0xa0/0xa8
[<0000000000106c1a>] kernel_thread_starter+0x6/0xc
[<0000000000106c14>] kernel_thread_starter+0x0/0xc
INFO: lockdep is turned off.
Last Breaking-Event-Address:
[<00000000003ff7cc>] scsi_remove_device+0x3c/0x54
The function __scsi_remove_target iterates through the SCSI devices on
the host, but it drops the host_lock before calling
scsi_remove_device. When the SCSI device is deleted from another
thread, the pointer to the SCSI device in scsi_remove_device can
become invalid. Fix this by getting a reference to the SCSI device
before dropping the host_lock to keep the SCSI device alive for the
call to scsi_remove_device.
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Cc: Stable Tree <stable@kernel.org>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-10-06 11:19:44 +00:00
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scsi_device_put(sdev);
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2005-04-16 22:20:36 +00:00
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spin_lock_irqsave(shost->host_lock, flags);
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2005-07-26 14:27:10 +00:00
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goto restart;
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2005-04-16 22:20:36 +00:00
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}
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spin_unlock_irqrestore(shost->host_lock, flags);
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2005-03-25 03:03:59 +00:00
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}
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2005-04-16 22:20:36 +00:00
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/**
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* scsi_remove_target - try to remove a target and all its devices
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* @dev: generic starget or parent of generic stargets to be removed
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*
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* Note: This is slightly racy. It is possible that if the user
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* requests the addition of another device then the target won't be
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* removed.
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*/
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void scsi_remove_target(struct device *dev)
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{
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2012-06-22 06:47:28 +00:00
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struct Scsi_Host *shost = dev_to_shost(dev->parent);
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2012-08-29 05:12:10 +00:00
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struct scsi_target *starget, *last = NULL;
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2012-06-22 06:47:28 +00:00
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unsigned long flags;
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2012-08-29 05:12:10 +00:00
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/* remove targets being careful to lookup next entry before
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* deleting the last
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*/
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2012-06-22 06:47:28 +00:00
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spin_lock_irqsave(shost->host_lock, flags);
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list_for_each_entry(starget, &shost->__targets, siblings) {
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if (starget->state == STARGET_DEL)
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continue;
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if (starget->dev.parent == dev || &starget->dev == dev) {
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2012-08-29 05:12:10 +00:00
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/* assuming new targets arrive at the end */
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starget->reap_ref++;
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spin_unlock_irqrestore(shost->host_lock, flags);
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if (last)
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scsi_target_reap(last);
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last = starget;
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__scsi_remove_target(starget);
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spin_lock_irqsave(shost->host_lock, flags);
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2012-06-22 06:47:28 +00:00
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}
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2005-04-16 22:20:36 +00:00
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}
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2012-06-22 06:47:28 +00:00
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spin_unlock_irqrestore(shost->host_lock, flags);
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2005-04-16 22:20:36 +00:00
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2012-08-29 05:12:10 +00:00
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if (last)
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scsi_target_reap(last);
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2005-04-16 22:20:36 +00:00
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}
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EXPORT_SYMBOL(scsi_remove_target);
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int scsi_register_driver(struct device_driver *drv)
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{
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drv->bus = &scsi_bus_type;
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return driver_register(drv);
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}
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EXPORT_SYMBOL(scsi_register_driver);
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int scsi_register_interface(struct class_interface *intf)
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{
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intf->class = &sdev_class;
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return class_interface_register(intf);
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}
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EXPORT_SYMBOL(scsi_register_interface);
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/**
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* scsi_sysfs_add_host - add scsi host to subsystem
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* @shost: scsi host struct to add to subsystem
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**/
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int scsi_sysfs_add_host(struct Scsi_Host *shost)
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{
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int error, i;
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2008-03-18 13:32:28 +00:00
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/* add host specific attributes */
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2005-04-16 22:20:36 +00:00
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if (shost->hostt->shost_attrs) {
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for (i = 0; shost->hostt->shost_attrs[i]; i++) {
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2008-02-21 23:13:36 +00:00
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error = device_create_file(&shost->shost_dev,
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2008-03-18 13:32:28 +00:00
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shost->hostt->shost_attrs[i]);
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2005-04-16 22:20:36 +00:00
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if (error)
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return error;
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}
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}
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transport_register_device(&shost->shost_gendev);
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2008-01-05 15:38:30 +00:00
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transport_configure_device(&shost->shost_gendev);
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2005-04-16 22:20:36 +00:00
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return 0;
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}
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2007-09-11 15:00:14 +00:00
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static struct device_type scsi_dev_type = {
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.name = "scsi_device",
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.release = scsi_device_dev_release,
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.groups = scsi_sdev_attr_groups,
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};
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2005-04-16 22:20:36 +00:00
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void scsi_sysfs_device_initialize(struct scsi_device *sdev)
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{
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unsigned long flags;
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struct Scsi_Host *shost = sdev->host;
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struct scsi_target *starget = sdev->sdev_target;
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device_initialize(&sdev->sdev_gendev);
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sdev->sdev_gendev.bus = &scsi_bus_type;
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2007-09-11 15:00:14 +00:00
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sdev->sdev_gendev.type = &scsi_dev_type;
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2008-12-03 21:41:36 +00:00
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dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%d",
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sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
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2008-02-21 23:13:36 +00:00
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device_initialize(&sdev->sdev_dev);
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2009-10-02 18:30:08 +00:00
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sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev);
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2008-02-21 23:13:36 +00:00
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sdev->sdev_dev.class = &sdev_class;
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2008-12-03 21:41:36 +00:00
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dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%d",
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sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
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2007-01-08 16:12:32 +00:00
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sdev->scsi_level = starget->scsi_level;
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2005-04-16 22:20:36 +00:00
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transport_setup_device(&sdev->sdev_gendev);
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spin_lock_irqsave(shost->host_lock, flags);
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list_add_tail(&sdev->same_target_siblings, &starget->devices);
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list_add_tail(&sdev->siblings, &shost->__devices);
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spin_unlock_irqrestore(shost->host_lock, flags);
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}
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int scsi_is_sdev_device(const struct device *dev)
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{
|
2007-09-26 17:54:49 +00:00
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return dev->type == &scsi_dev_type;
|
2005-04-16 22:20:36 +00:00
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}
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EXPORT_SYMBOL(scsi_is_sdev_device);
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/* A blank transport template that is used in drivers that don't
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* yet implement Transport Attributes */
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struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, };
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