linux-sg2042/drivers/scsi/ch.c

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/*
* SCSI Media Changer device driver for Linux 2.6
*
* (c) 1996-2003 Gerd Knorr <kraxel@bytesex.org>
*
*/
#define VERSION "0.25"
#include <linux/module.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/major.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/blkdev.h>
#include <linux/completion.h>
#include <linux/compat.h>
#include <linux/chio.h> /* here are all the ioctls */
#include <linux/mutex.h>
[SCSI] ch: fix device minor number management bug ch_probe uses the total number of ch devices as minor. ch_probe: ch->minor = ch_devcount; ... ch_devcount++; Then ch_remove decreases ch_devcount: ch_remove: ch_devcount--; If you have two ch devices, sch0 and sch1, and remove sch0, ch_devcount is 1. Then if you add another ch device, ch_probe tries to create sch1. So you get a warning and fail to create sch1: Jan 24 16:01:05 nice kernel: sysfs: duplicate filename 'sch1' can not be created Jan 24 16:01:05 nice kernel: WARNING: at fs/sysfs/dir.c:424 sysfs_add_one() Jan 24 16:01:05 nice kernel: Pid: 2571, comm: iscsid Not tainted 2.6.24-rc7-ga3d2c2e8-dirty #1 Jan 24 16:01:05 nice kernel: Jan 24 16:01:05 nice kernel: Call Trace: Jan 24 16:01:05 nice kernel: [<ffffffff802a22b8>] sysfs_add_one+0x54/0xbd Jan 24 16:01:05 nice kernel: [<ffffffff802a283c>] create_dir+0x4f/0x87 Jan 24 16:01:05 nice kernel: [<ffffffff802a28a9>] sysfs_create_dir+0x35/0x4a Jan 24 16:01:05 nice kernel: [<ffffffff803069a1>] kobject_get+0x12/0x17 Jan 24 16:01:05 nice kernel: [<ffffffff80306ece>] kobject_add+0xf3/0x1a6 Jan 24 16:01:05 nice kernel: [<ffffffff8034252b>] class_device_add+0xaa/0x39d Jan 24 16:01:05 nice kernel: [<ffffffff803428fb>] class_device_create+0xcb/0xfa Jan 24 16:01:05 nice kernel: [<ffffffff80229e09>] printk+0x4e/0x56 Jan 24 16:01:05 nice kernel: [<ffffffff802a2054>] sysfs_ilookup_test+0x0/0xf Jan 24 16:01:05 nice kernel: [<ffffffff88022580>] :ch:ch_probe+0xbe/0x61a (snip) This patch converts ch to use a standard minor number management way, idr like sg and bsg. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-24 16:24:50 +08:00
#include <linux/idr.h>
#include <linux/smp_lock.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 16:04:11 +08:00
#include <linux/slab.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_driver.h>
#include <scsi/scsi_ioctl.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_dbg.h>
#define CH_DT_MAX 16
#define CH_TYPES 8
[SCSI] ch: fix device minor number management bug ch_probe uses the total number of ch devices as minor. ch_probe: ch->minor = ch_devcount; ... ch_devcount++; Then ch_remove decreases ch_devcount: ch_remove: ch_devcount--; If you have two ch devices, sch0 and sch1, and remove sch0, ch_devcount is 1. Then if you add another ch device, ch_probe tries to create sch1. So you get a warning and fail to create sch1: Jan 24 16:01:05 nice kernel: sysfs: duplicate filename 'sch1' can not be created Jan 24 16:01:05 nice kernel: WARNING: at fs/sysfs/dir.c:424 sysfs_add_one() Jan 24 16:01:05 nice kernel: Pid: 2571, comm: iscsid Not tainted 2.6.24-rc7-ga3d2c2e8-dirty #1 Jan 24 16:01:05 nice kernel: Jan 24 16:01:05 nice kernel: Call Trace: Jan 24 16:01:05 nice kernel: [<ffffffff802a22b8>] sysfs_add_one+0x54/0xbd Jan 24 16:01:05 nice kernel: [<ffffffff802a283c>] create_dir+0x4f/0x87 Jan 24 16:01:05 nice kernel: [<ffffffff802a28a9>] sysfs_create_dir+0x35/0x4a Jan 24 16:01:05 nice kernel: [<ffffffff803069a1>] kobject_get+0x12/0x17 Jan 24 16:01:05 nice kernel: [<ffffffff80306ece>] kobject_add+0xf3/0x1a6 Jan 24 16:01:05 nice kernel: [<ffffffff8034252b>] class_device_add+0xaa/0x39d Jan 24 16:01:05 nice kernel: [<ffffffff803428fb>] class_device_create+0xcb/0xfa Jan 24 16:01:05 nice kernel: [<ffffffff80229e09>] printk+0x4e/0x56 Jan 24 16:01:05 nice kernel: [<ffffffff802a2054>] sysfs_ilookup_test+0x0/0xf Jan 24 16:01:05 nice kernel: [<ffffffff88022580>] :ch:ch_probe+0xbe/0x61a (snip) This patch converts ch to use a standard minor number management way, idr like sg and bsg. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-24 16:24:50 +08:00
#define CH_MAX_DEVS 128
MODULE_DESCRIPTION("device driver for scsi media changer devices");
MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org>");
MODULE_LICENSE("GPL");
MODULE_ALIAS_CHARDEV_MAJOR(SCSI_CHANGER_MAJOR);
MODULE_ALIAS_SCSI_DEVICE(TYPE_MEDIUM_CHANGER);
static int init = 1;
module_param(init, int, 0444);
MODULE_PARM_DESC(init, \
"initialize element status on driver load (default: on)");
static int timeout_move = 300;
module_param(timeout_move, int, 0644);
MODULE_PARM_DESC(timeout_move,"timeout for move commands "
"(default: 300 seconds)");
static int timeout_init = 3600;
module_param(timeout_init, int, 0644);
MODULE_PARM_DESC(timeout_init,"timeout for INITIALIZE ELEMENT STATUS "
"(default: 3600 seconds)");
static int verbose = 1;
module_param(verbose, int, 0644);
MODULE_PARM_DESC(verbose,"be verbose (default: on)");
static int debug = 0;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug,"enable/disable debug messages, also prints more "
"detailed sense codes on scsi errors (default: off)");
static int dt_id[CH_DT_MAX] = { [ 0 ... (CH_DT_MAX-1) ] = -1 };
static int dt_lun[CH_DT_MAX];
module_param_array(dt_id, int, NULL, 0444);
module_param_array(dt_lun, int, NULL, 0444);
/* tell the driver about vendor-specific slots */
static int vendor_firsts[CH_TYPES-4];
static int vendor_counts[CH_TYPES-4];
module_param_array(vendor_firsts, int, NULL, 0444);
module_param_array(vendor_counts, int, NULL, 0444);
static const char * vendor_labels[CH_TYPES-4] = {
"v0", "v1", "v2", "v3"
};
// module_param_string_array(vendor_labels, NULL, 0444);
#define dprintk(fmt, arg...) if (debug) \
printk(KERN_DEBUG "%s: " fmt, ch->name , ## arg)
#define vprintk(fmt, arg...) if (verbose) \
printk(KERN_INFO "%s: " fmt, ch->name , ## arg)
/* ------------------------------------------------------------------- */
#define MAX_RETRIES 1
static struct class * ch_sysfs_class;
typedef struct {
struct list_head list;
int minor;
char name[8];
struct scsi_device *device;
struct scsi_device **dt; /* ptrs to data transfer elements */
u_int firsts[CH_TYPES];
u_int counts[CH_TYPES];
u_int unit_attention;
u_int voltags;
struct mutex lock;
} scsi_changer;
[SCSI] ch: fix device minor number management bug ch_probe uses the total number of ch devices as minor. ch_probe: ch->minor = ch_devcount; ... ch_devcount++; Then ch_remove decreases ch_devcount: ch_remove: ch_devcount--; If you have two ch devices, sch0 and sch1, and remove sch0, ch_devcount is 1. Then if you add another ch device, ch_probe tries to create sch1. So you get a warning and fail to create sch1: Jan 24 16:01:05 nice kernel: sysfs: duplicate filename 'sch1' can not be created Jan 24 16:01:05 nice kernel: WARNING: at fs/sysfs/dir.c:424 sysfs_add_one() Jan 24 16:01:05 nice kernel: Pid: 2571, comm: iscsid Not tainted 2.6.24-rc7-ga3d2c2e8-dirty #1 Jan 24 16:01:05 nice kernel: Jan 24 16:01:05 nice kernel: Call Trace: Jan 24 16:01:05 nice kernel: [<ffffffff802a22b8>] sysfs_add_one+0x54/0xbd Jan 24 16:01:05 nice kernel: [<ffffffff802a283c>] create_dir+0x4f/0x87 Jan 24 16:01:05 nice kernel: [<ffffffff802a28a9>] sysfs_create_dir+0x35/0x4a Jan 24 16:01:05 nice kernel: [<ffffffff803069a1>] kobject_get+0x12/0x17 Jan 24 16:01:05 nice kernel: [<ffffffff80306ece>] kobject_add+0xf3/0x1a6 Jan 24 16:01:05 nice kernel: [<ffffffff8034252b>] class_device_add+0xaa/0x39d Jan 24 16:01:05 nice kernel: [<ffffffff803428fb>] class_device_create+0xcb/0xfa Jan 24 16:01:05 nice kernel: [<ffffffff80229e09>] printk+0x4e/0x56 Jan 24 16:01:05 nice kernel: [<ffffffff802a2054>] sysfs_ilookup_test+0x0/0xf Jan 24 16:01:05 nice kernel: [<ffffffff88022580>] :ch:ch_probe+0xbe/0x61a (snip) This patch converts ch to use a standard minor number management way, idr like sg and bsg. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-24 16:24:50 +08:00
static DEFINE_IDR(ch_index_idr);
static DEFINE_SPINLOCK(ch_index_lock);
static const struct {
unsigned char sense;
unsigned char asc;
unsigned char ascq;
int errno;
} ch_err[] = {
/* Just filled in what looks right. Hav'nt checked any standard paper for
these errno assignments, so they may be wrong... */
{
.sense = ILLEGAL_REQUEST,
.asc = 0x21,
.ascq = 0x01,
.errno = EBADSLT, /* Invalid element address */
},{
.sense = ILLEGAL_REQUEST,
.asc = 0x28,
.ascq = 0x01,
.errno = EBADE, /* Import or export element accessed */
},{
.sense = ILLEGAL_REQUEST,
.asc = 0x3B,
.ascq = 0x0D,
.errno = EXFULL, /* Medium destination element full */
},{
.sense = ILLEGAL_REQUEST,
.asc = 0x3B,
.ascq = 0x0E,
.errno = EBADE, /* Medium source element empty */
},{
.sense = ILLEGAL_REQUEST,
.asc = 0x20,
.ascq = 0x00,
.errno = EBADRQC, /* Invalid command operation code */
},{
/* end of list */
}
};
/* ------------------------------------------------------------------- */
static int ch_find_errno(struct scsi_sense_hdr *sshdr)
{
int i,errno = 0;
/* Check to see if additional sense information is available */
if (scsi_sense_valid(sshdr) &&
sshdr->asc != 0) {
for (i = 0; ch_err[i].errno != 0; i++) {
if (ch_err[i].sense == sshdr->sense_key &&
ch_err[i].asc == sshdr->asc &&
ch_err[i].ascq == sshdr->ascq) {
errno = -ch_err[i].errno;
break;
}
}
}
if (errno == 0)
errno = -EIO;
return errno;
}
static int
ch_do_scsi(scsi_changer *ch, unsigned char *cmd,
void *buffer, unsigned buflength,
enum dma_data_direction direction)
{
int errno, retries = 0, timeout, result;
struct scsi_sense_hdr sshdr;
timeout = (cmd[0] == INITIALIZE_ELEMENT_STATUS)
? timeout_init : timeout_move;
retry:
errno = 0;
if (debug) {
dprintk("command: ");
__scsi_print_command(cmd);
}
result = scsi_execute_req(ch->device, cmd, direction, buffer,
buflength, &sshdr, timeout * HZ,
MAX_RETRIES, NULL);
dprintk("result: 0x%x\n",result);
if (driver_byte(result) & DRIVER_SENSE) {
if (debug)
scsi_print_sense_hdr(ch->name, &sshdr);
errno = ch_find_errno(&sshdr);
switch(sshdr.sense_key) {
case UNIT_ATTENTION:
ch->unit_attention = 1;
if (retries++ < 3)
goto retry;
break;
}
}
return errno;
}
/* ------------------------------------------------------------------------ */
static int
ch_elem_to_typecode(scsi_changer *ch, u_int elem)
{
int i;
for (i = 0; i < CH_TYPES; i++) {
if (elem >= ch->firsts[i] &&
elem < ch->firsts[i] +
ch->counts[i])
return i+1;
}
return 0;
}
static int
ch_read_element_status(scsi_changer *ch, u_int elem, char *data)
{
u_char cmd[12];
u_char *buffer;
int result;
buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
if(!buffer)
return -ENOMEM;
retry:
memset(cmd,0,sizeof(cmd));
cmd[0] = READ_ELEMENT_STATUS;
cmd[1] = (ch->device->lun << 5) |
(ch->voltags ? 0x10 : 0) |
ch_elem_to_typecode(ch,elem);
cmd[2] = (elem >> 8) & 0xff;
cmd[3] = elem & 0xff;
cmd[5] = 1;
cmd[9] = 255;
if (0 == (result = ch_do_scsi(ch, cmd, buffer, 256, DMA_FROM_DEVICE))) {
if (((buffer[16] << 8) | buffer[17]) != elem) {
dprintk("asked for element 0x%02x, got 0x%02x\n",
elem,(buffer[16] << 8) | buffer[17]);
kfree(buffer);
return -EIO;
}
memcpy(data,buffer+16,16);
} else {
if (ch->voltags) {
ch->voltags = 0;
vprintk("device has no volume tag support\n");
goto retry;
}
dprintk("READ ELEMENT STATUS for element 0x%x failed\n",elem);
}
kfree(buffer);
return result;
}
static int
ch_init_elem(scsi_changer *ch)
{
int err;
u_char cmd[6];
vprintk("INITIALIZE ELEMENT STATUS, may take some time ...\n");
memset(cmd,0,sizeof(cmd));
cmd[0] = INITIALIZE_ELEMENT_STATUS;
cmd[1] = ch->device->lun << 5;
err = ch_do_scsi(ch, cmd, NULL, 0, DMA_NONE);
vprintk("... finished\n");
return err;
}
static int
ch_readconfig(scsi_changer *ch)
{
u_char cmd[10], data[16];
u_char *buffer;
int result,id,lun,i;
u_int elem;
buffer = kzalloc(512, GFP_KERNEL | GFP_DMA);
if (!buffer)
return -ENOMEM;
memset(cmd,0,sizeof(cmd));
cmd[0] = MODE_SENSE;
cmd[1] = ch->device->lun << 5;
cmd[2] = 0x1d;
cmd[4] = 255;
result = ch_do_scsi(ch, cmd, buffer, 255, DMA_FROM_DEVICE);
if (0 != result) {
cmd[1] |= (1<<3);
result = ch_do_scsi(ch, cmd, buffer, 255, DMA_FROM_DEVICE);
}
if (0 == result) {
ch->firsts[CHET_MT] =
(buffer[buffer[3]+ 6] << 8) | buffer[buffer[3]+ 7];
ch->counts[CHET_MT] =
(buffer[buffer[3]+ 8] << 8) | buffer[buffer[3]+ 9];
ch->firsts[CHET_ST] =
(buffer[buffer[3]+10] << 8) | buffer[buffer[3]+11];
ch->counts[CHET_ST] =
(buffer[buffer[3]+12] << 8) | buffer[buffer[3]+13];
ch->firsts[CHET_IE] =
(buffer[buffer[3]+14] << 8) | buffer[buffer[3]+15];
ch->counts[CHET_IE] =
(buffer[buffer[3]+16] << 8) | buffer[buffer[3]+17];
ch->firsts[CHET_DT] =
(buffer[buffer[3]+18] << 8) | buffer[buffer[3]+19];
ch->counts[CHET_DT] =
(buffer[buffer[3]+20] << 8) | buffer[buffer[3]+21];
vprintk("type #1 (mt): 0x%x+%d [medium transport]\n",
ch->firsts[CHET_MT],
ch->counts[CHET_MT]);
vprintk("type #2 (st): 0x%x+%d [storage]\n",
ch->firsts[CHET_ST],
ch->counts[CHET_ST]);
vprintk("type #3 (ie): 0x%x+%d [import/export]\n",
ch->firsts[CHET_IE],
ch->counts[CHET_IE]);
vprintk("type #4 (dt): 0x%x+%d [data transfer]\n",
ch->firsts[CHET_DT],
ch->counts[CHET_DT]);
} else {
vprintk("reading element address assigment page failed!\n");
}
/* vendor specific element types */
for (i = 0; i < 4; i++) {
if (0 == vendor_counts[i])
continue;
if (NULL == vendor_labels[i])
continue;
ch->firsts[CHET_V1+i] = vendor_firsts[i];
ch->counts[CHET_V1+i] = vendor_counts[i];
vprintk("type #%d (v%d): 0x%x+%d [%s, vendor specific]\n",
i+5,i+1,vendor_firsts[i],vendor_counts[i],
vendor_labels[i]);
}
/* look up the devices of the data transfer elements */
ch->dt = kmalloc(ch->counts[CHET_DT]*sizeof(struct scsi_device),
GFP_KERNEL);
if (!ch->dt) {
kfree(buffer);
return -ENOMEM;
}
for (elem = 0; elem < ch->counts[CHET_DT]; elem++) {
id = -1;
lun = 0;
if (elem < CH_DT_MAX && -1 != dt_id[elem]) {
id = dt_id[elem];
lun = dt_lun[elem];
vprintk("dt 0x%x: [insmod option] ",
elem+ch->firsts[CHET_DT]);
} else if (0 != ch_read_element_status
(ch,elem+ch->firsts[CHET_DT],data)) {
vprintk("dt 0x%x: READ ELEMENT STATUS failed\n",
elem+ch->firsts[CHET_DT]);
} else {
vprintk("dt 0x%x: ",elem+ch->firsts[CHET_DT]);
if (data[6] & 0x80) {
if (verbose)
printk("not this SCSI bus\n");
ch->dt[elem] = NULL;
} else if (0 == (data[6] & 0x30)) {
if (verbose)
printk("ID/LUN unknown\n");
ch->dt[elem] = NULL;
} else {
id = ch->device->id;
lun = 0;
if (data[6] & 0x20) id = data[7];
if (data[6] & 0x10) lun = data[6] & 7;
}
}
if (-1 != id) {
if (verbose)
printk("ID %i, LUN %i, ",id,lun);
ch->dt[elem] =
scsi_device_lookup(ch->device->host,
ch->device->channel,
id,lun);
if (!ch->dt[elem]) {
/* should not happen */
if (verbose)
printk("Huh? device not found!\n");
} else {
if (verbose)
printk("name: %8.8s %16.16s %4.4s\n",
ch->dt[elem]->vendor,
ch->dt[elem]->model,
ch->dt[elem]->rev);
}
}
}
ch->voltags = 1;
kfree(buffer);
return 0;
}
/* ------------------------------------------------------------------------ */
static int
ch_position(scsi_changer *ch, u_int trans, u_int elem, int rotate)
{
u_char cmd[10];
dprintk("position: 0x%x\n",elem);
if (0 == trans)
trans = ch->firsts[CHET_MT];
memset(cmd,0,sizeof(cmd));
cmd[0] = POSITION_TO_ELEMENT;
cmd[1] = ch->device->lun << 5;
cmd[2] = (trans >> 8) & 0xff;
cmd[3] = trans & 0xff;
cmd[4] = (elem >> 8) & 0xff;
cmd[5] = elem & 0xff;
cmd[8] = rotate ? 1 : 0;
return ch_do_scsi(ch, cmd, NULL, 0, DMA_NONE);
}
static int
ch_move(scsi_changer *ch, u_int trans, u_int src, u_int dest, int rotate)
{
u_char cmd[12];
dprintk("move: 0x%x => 0x%x\n",src,dest);
if (0 == trans)
trans = ch->firsts[CHET_MT];
memset(cmd,0,sizeof(cmd));
cmd[0] = MOVE_MEDIUM;
cmd[1] = ch->device->lun << 5;
cmd[2] = (trans >> 8) & 0xff;
cmd[3] = trans & 0xff;
cmd[4] = (src >> 8) & 0xff;
cmd[5] = src & 0xff;
cmd[6] = (dest >> 8) & 0xff;
cmd[7] = dest & 0xff;
cmd[10] = rotate ? 1 : 0;
return ch_do_scsi(ch, cmd, NULL,0, DMA_NONE);
}
static int
ch_exchange(scsi_changer *ch, u_int trans, u_int src,
u_int dest1, u_int dest2, int rotate1, int rotate2)
{
u_char cmd[12];
dprintk("exchange: 0x%x => 0x%x => 0x%x\n",
src,dest1,dest2);
if (0 == trans)
trans = ch->firsts[CHET_MT];
memset(cmd,0,sizeof(cmd));
cmd[0] = EXCHANGE_MEDIUM;
cmd[1] = ch->device->lun << 5;
cmd[2] = (trans >> 8) & 0xff;
cmd[3] = trans & 0xff;
cmd[4] = (src >> 8) & 0xff;
cmd[5] = src & 0xff;
cmd[6] = (dest1 >> 8) & 0xff;
cmd[7] = dest1 & 0xff;
cmd[8] = (dest2 >> 8) & 0xff;
cmd[9] = dest2 & 0xff;
cmd[10] = (rotate1 ? 1 : 0) | (rotate2 ? 2 : 0);
return ch_do_scsi(ch, cmd, NULL,0, DMA_NONE);
}
static void
ch_check_voltag(char *tag)
{
int i;
for (i = 0; i < 32; i++) {
/* restrict to ascii */
if (tag[i] >= 0x7f || tag[i] < 0x20)
tag[i] = ' ';
/* don't allow search wildcards */
if (tag[i] == '?' ||
tag[i] == '*')
tag[i] = ' ';
}
}
static int
ch_set_voltag(scsi_changer *ch, u_int elem,
int alternate, int clear, u_char *tag)
{
u_char cmd[12];
u_char *buffer;
int result;
buffer = kzalloc(512, GFP_KERNEL);
if (!buffer)
return -ENOMEM;
dprintk("%s %s voltag: 0x%x => \"%s\"\n",
clear ? "clear" : "set",
alternate ? "alternate" : "primary",
elem, tag);
memset(cmd,0,sizeof(cmd));
cmd[0] = SEND_VOLUME_TAG;
cmd[1] = (ch->device->lun << 5) |
ch_elem_to_typecode(ch,elem);
cmd[2] = (elem >> 8) & 0xff;
cmd[3] = elem & 0xff;
cmd[5] = clear
? (alternate ? 0x0d : 0x0c)
: (alternate ? 0x0b : 0x0a);
cmd[9] = 255;
memcpy(buffer,tag,32);
ch_check_voltag(buffer);
result = ch_do_scsi(ch, cmd, buffer, 256, DMA_TO_DEVICE);
kfree(buffer);
return result;
}
static int ch_gstatus(scsi_changer *ch, int type, unsigned char __user *dest)
{
int retval = 0;
u_char data[16];
unsigned int i;
mutex_lock(&ch->lock);
for (i = 0; i < ch->counts[type]; i++) {
if (0 != ch_read_element_status
(ch, ch->firsts[type]+i,data)) {
retval = -EIO;
break;
}
put_user(data[2], dest+i);
if (data[2] & CESTATUS_EXCEPT)
vprintk("element 0x%x: asc=0x%x, ascq=0x%x\n",
ch->firsts[type]+i,
(int)data[4],(int)data[5]);
retval = ch_read_element_status
(ch, ch->firsts[type]+i,data);
if (0 != retval)
break;
}
mutex_unlock(&ch->lock);
return retval;
}
/* ------------------------------------------------------------------------ */
static int
ch_release(struct inode *inode, struct file *file)
{
scsi_changer *ch = file->private_data;
scsi_device_put(ch->device);
file->private_data = NULL;
return 0;
}
static int
ch_open(struct inode *inode, struct file *file)
{
[SCSI] ch: fix device minor number management bug ch_probe uses the total number of ch devices as minor. ch_probe: ch->minor = ch_devcount; ... ch_devcount++; Then ch_remove decreases ch_devcount: ch_remove: ch_devcount--; If you have two ch devices, sch0 and sch1, and remove sch0, ch_devcount is 1. Then if you add another ch device, ch_probe tries to create sch1. So you get a warning and fail to create sch1: Jan 24 16:01:05 nice kernel: sysfs: duplicate filename 'sch1' can not be created Jan 24 16:01:05 nice kernel: WARNING: at fs/sysfs/dir.c:424 sysfs_add_one() Jan 24 16:01:05 nice kernel: Pid: 2571, comm: iscsid Not tainted 2.6.24-rc7-ga3d2c2e8-dirty #1 Jan 24 16:01:05 nice kernel: Jan 24 16:01:05 nice kernel: Call Trace: Jan 24 16:01:05 nice kernel: [<ffffffff802a22b8>] sysfs_add_one+0x54/0xbd Jan 24 16:01:05 nice kernel: [<ffffffff802a283c>] create_dir+0x4f/0x87 Jan 24 16:01:05 nice kernel: [<ffffffff802a28a9>] sysfs_create_dir+0x35/0x4a Jan 24 16:01:05 nice kernel: [<ffffffff803069a1>] kobject_get+0x12/0x17 Jan 24 16:01:05 nice kernel: [<ffffffff80306ece>] kobject_add+0xf3/0x1a6 Jan 24 16:01:05 nice kernel: [<ffffffff8034252b>] class_device_add+0xaa/0x39d Jan 24 16:01:05 nice kernel: [<ffffffff803428fb>] class_device_create+0xcb/0xfa Jan 24 16:01:05 nice kernel: [<ffffffff80229e09>] printk+0x4e/0x56 Jan 24 16:01:05 nice kernel: [<ffffffff802a2054>] sysfs_ilookup_test+0x0/0xf Jan 24 16:01:05 nice kernel: [<ffffffff88022580>] :ch:ch_probe+0xbe/0x61a (snip) This patch converts ch to use a standard minor number management way, idr like sg and bsg. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-24 16:24:50 +08:00
scsi_changer *ch;
int minor = iminor(inode);
lock_kernel();
[SCSI] ch: fix device minor number management bug ch_probe uses the total number of ch devices as minor. ch_probe: ch->minor = ch_devcount; ... ch_devcount++; Then ch_remove decreases ch_devcount: ch_remove: ch_devcount--; If you have two ch devices, sch0 and sch1, and remove sch0, ch_devcount is 1. Then if you add another ch device, ch_probe tries to create sch1. So you get a warning and fail to create sch1: Jan 24 16:01:05 nice kernel: sysfs: duplicate filename 'sch1' can not be created Jan 24 16:01:05 nice kernel: WARNING: at fs/sysfs/dir.c:424 sysfs_add_one() Jan 24 16:01:05 nice kernel: Pid: 2571, comm: iscsid Not tainted 2.6.24-rc7-ga3d2c2e8-dirty #1 Jan 24 16:01:05 nice kernel: Jan 24 16:01:05 nice kernel: Call Trace: Jan 24 16:01:05 nice kernel: [<ffffffff802a22b8>] sysfs_add_one+0x54/0xbd Jan 24 16:01:05 nice kernel: [<ffffffff802a283c>] create_dir+0x4f/0x87 Jan 24 16:01:05 nice kernel: [<ffffffff802a28a9>] sysfs_create_dir+0x35/0x4a Jan 24 16:01:05 nice kernel: [<ffffffff803069a1>] kobject_get+0x12/0x17 Jan 24 16:01:05 nice kernel: [<ffffffff80306ece>] kobject_add+0xf3/0x1a6 Jan 24 16:01:05 nice kernel: [<ffffffff8034252b>] class_device_add+0xaa/0x39d Jan 24 16:01:05 nice kernel: [<ffffffff803428fb>] class_device_create+0xcb/0xfa Jan 24 16:01:05 nice kernel: [<ffffffff80229e09>] printk+0x4e/0x56 Jan 24 16:01:05 nice kernel: [<ffffffff802a2054>] sysfs_ilookup_test+0x0/0xf Jan 24 16:01:05 nice kernel: [<ffffffff88022580>] :ch:ch_probe+0xbe/0x61a (snip) This patch converts ch to use a standard minor number management way, idr like sg and bsg. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-24 16:24:50 +08:00
spin_lock(&ch_index_lock);
ch = idr_find(&ch_index_idr, minor);
if (NULL == ch || scsi_device_get(ch->device)) {
[SCSI] ch: fix device minor number management bug ch_probe uses the total number of ch devices as minor. ch_probe: ch->minor = ch_devcount; ... ch_devcount++; Then ch_remove decreases ch_devcount: ch_remove: ch_devcount--; If you have two ch devices, sch0 and sch1, and remove sch0, ch_devcount is 1. Then if you add another ch device, ch_probe tries to create sch1. So you get a warning and fail to create sch1: Jan 24 16:01:05 nice kernel: sysfs: duplicate filename 'sch1' can not be created Jan 24 16:01:05 nice kernel: WARNING: at fs/sysfs/dir.c:424 sysfs_add_one() Jan 24 16:01:05 nice kernel: Pid: 2571, comm: iscsid Not tainted 2.6.24-rc7-ga3d2c2e8-dirty #1 Jan 24 16:01:05 nice kernel: Jan 24 16:01:05 nice kernel: Call Trace: Jan 24 16:01:05 nice kernel: [<ffffffff802a22b8>] sysfs_add_one+0x54/0xbd Jan 24 16:01:05 nice kernel: [<ffffffff802a283c>] create_dir+0x4f/0x87 Jan 24 16:01:05 nice kernel: [<ffffffff802a28a9>] sysfs_create_dir+0x35/0x4a Jan 24 16:01:05 nice kernel: [<ffffffff803069a1>] kobject_get+0x12/0x17 Jan 24 16:01:05 nice kernel: [<ffffffff80306ece>] kobject_add+0xf3/0x1a6 Jan 24 16:01:05 nice kernel: [<ffffffff8034252b>] class_device_add+0xaa/0x39d Jan 24 16:01:05 nice kernel: [<ffffffff803428fb>] class_device_create+0xcb/0xfa Jan 24 16:01:05 nice kernel: [<ffffffff80229e09>] printk+0x4e/0x56 Jan 24 16:01:05 nice kernel: [<ffffffff802a2054>] sysfs_ilookup_test+0x0/0xf Jan 24 16:01:05 nice kernel: [<ffffffff88022580>] :ch:ch_probe+0xbe/0x61a (snip) This patch converts ch to use a standard minor number management way, idr like sg and bsg. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-24 16:24:50 +08:00
spin_unlock(&ch_index_lock);
unlock_kernel();
return -ENXIO;
}
[SCSI] ch: fix device minor number management bug ch_probe uses the total number of ch devices as minor. ch_probe: ch->minor = ch_devcount; ... ch_devcount++; Then ch_remove decreases ch_devcount: ch_remove: ch_devcount--; If you have two ch devices, sch0 and sch1, and remove sch0, ch_devcount is 1. Then if you add another ch device, ch_probe tries to create sch1. So you get a warning and fail to create sch1: Jan 24 16:01:05 nice kernel: sysfs: duplicate filename 'sch1' can not be created Jan 24 16:01:05 nice kernel: WARNING: at fs/sysfs/dir.c:424 sysfs_add_one() Jan 24 16:01:05 nice kernel: Pid: 2571, comm: iscsid Not tainted 2.6.24-rc7-ga3d2c2e8-dirty #1 Jan 24 16:01:05 nice kernel: Jan 24 16:01:05 nice kernel: Call Trace: Jan 24 16:01:05 nice kernel: [<ffffffff802a22b8>] sysfs_add_one+0x54/0xbd Jan 24 16:01:05 nice kernel: [<ffffffff802a283c>] create_dir+0x4f/0x87 Jan 24 16:01:05 nice kernel: [<ffffffff802a28a9>] sysfs_create_dir+0x35/0x4a Jan 24 16:01:05 nice kernel: [<ffffffff803069a1>] kobject_get+0x12/0x17 Jan 24 16:01:05 nice kernel: [<ffffffff80306ece>] kobject_add+0xf3/0x1a6 Jan 24 16:01:05 nice kernel: [<ffffffff8034252b>] class_device_add+0xaa/0x39d Jan 24 16:01:05 nice kernel: [<ffffffff803428fb>] class_device_create+0xcb/0xfa Jan 24 16:01:05 nice kernel: [<ffffffff80229e09>] printk+0x4e/0x56 Jan 24 16:01:05 nice kernel: [<ffffffff802a2054>] sysfs_ilookup_test+0x0/0xf Jan 24 16:01:05 nice kernel: [<ffffffff88022580>] :ch:ch_probe+0xbe/0x61a (snip) This patch converts ch to use a standard minor number management way, idr like sg and bsg. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-24 16:24:50 +08:00
spin_unlock(&ch_index_lock);
file->private_data = ch;
unlock_kernel();
return 0;
}
static int
ch_checkrange(scsi_changer *ch, unsigned int type, unsigned int unit)
{
if (type >= CH_TYPES || unit >= ch->counts[type])
return -1;
return 0;
}
static long ch_ioctl(struct file *file,
unsigned int cmd, unsigned long arg)
{
scsi_changer *ch = file->private_data;
int retval;
void __user *argp = (void __user *)arg;
switch (cmd) {
case CHIOGPARAMS:
{
struct changer_params params;
params.cp_curpicker = 0;
params.cp_npickers = ch->counts[CHET_MT];
params.cp_nslots = ch->counts[CHET_ST];
params.cp_nportals = ch->counts[CHET_IE];
params.cp_ndrives = ch->counts[CHET_DT];
if (copy_to_user(argp, &params, sizeof(params)))
return -EFAULT;
return 0;
}
case CHIOGVPARAMS:
{
struct changer_vendor_params vparams;
memset(&vparams,0,sizeof(vparams));
if (ch->counts[CHET_V1]) {
vparams.cvp_n1 = ch->counts[CHET_V1];
strncpy(vparams.cvp_label1,vendor_labels[0],16);
}
if (ch->counts[CHET_V2]) {
vparams.cvp_n2 = ch->counts[CHET_V2];
strncpy(vparams.cvp_label2,vendor_labels[1],16);
}
if (ch->counts[CHET_V3]) {
vparams.cvp_n3 = ch->counts[CHET_V3];
strncpy(vparams.cvp_label3,vendor_labels[2],16);
}
if (ch->counts[CHET_V4]) {
vparams.cvp_n4 = ch->counts[CHET_V4];
strncpy(vparams.cvp_label4,vendor_labels[3],16);
}
if (copy_to_user(argp, &vparams, sizeof(vparams)))
return -EFAULT;
return 0;
}
case CHIOPOSITION:
{
struct changer_position pos;
if (copy_from_user(&pos, argp, sizeof (pos)))
return -EFAULT;
if (0 != ch_checkrange(ch, pos.cp_type, pos.cp_unit)) {
dprintk("CHIOPOSITION: invalid parameter\n");
return -EBADSLT;
}
mutex_lock(&ch->lock);
retval = ch_position(ch,0,
ch->firsts[pos.cp_type] + pos.cp_unit,
pos.cp_flags & CP_INVERT);
mutex_unlock(&ch->lock);
return retval;
}
case CHIOMOVE:
{
struct changer_move mv;
if (copy_from_user(&mv, argp, sizeof (mv)))
return -EFAULT;
if (0 != ch_checkrange(ch, mv.cm_fromtype, mv.cm_fromunit) ||
0 != ch_checkrange(ch, mv.cm_totype, mv.cm_tounit )) {
dprintk("CHIOMOVE: invalid parameter\n");
return -EBADSLT;
}
mutex_lock(&ch->lock);
retval = ch_move(ch,0,
ch->firsts[mv.cm_fromtype] + mv.cm_fromunit,
ch->firsts[mv.cm_totype] + mv.cm_tounit,
mv.cm_flags & CM_INVERT);
mutex_unlock(&ch->lock);
return retval;
}
case CHIOEXCHANGE:
{
struct changer_exchange mv;
if (copy_from_user(&mv, argp, sizeof (mv)))
return -EFAULT;
if (0 != ch_checkrange(ch, mv.ce_srctype, mv.ce_srcunit ) ||
0 != ch_checkrange(ch, mv.ce_fdsttype, mv.ce_fdstunit) ||
0 != ch_checkrange(ch, mv.ce_sdsttype, mv.ce_sdstunit)) {
dprintk("CHIOEXCHANGE: invalid parameter\n");
return -EBADSLT;
}
mutex_lock(&ch->lock);
retval = ch_exchange
(ch,0,
ch->firsts[mv.ce_srctype] + mv.ce_srcunit,
ch->firsts[mv.ce_fdsttype] + mv.ce_fdstunit,
ch->firsts[mv.ce_sdsttype] + mv.ce_sdstunit,
mv.ce_flags & CE_INVERT1, mv.ce_flags & CE_INVERT2);
mutex_unlock(&ch->lock);
return retval;
}
case CHIOGSTATUS:
{
struct changer_element_status ces;
if (copy_from_user(&ces, argp, sizeof (ces)))
return -EFAULT;
if (ces.ces_type < 0 || ces.ces_type >= CH_TYPES)
return -EINVAL;
return ch_gstatus(ch, ces.ces_type, ces.ces_data);
}
case CHIOGELEM:
{
struct changer_get_element cge;
u_char ch_cmd[12];
u_char *buffer;
unsigned int elem;
int result,i;
if (copy_from_user(&cge, argp, sizeof (cge)))
return -EFAULT;
if (0 != ch_checkrange(ch, cge.cge_type, cge.cge_unit))
return -EINVAL;
elem = ch->firsts[cge.cge_type] + cge.cge_unit;
buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
if (!buffer)
return -ENOMEM;
mutex_lock(&ch->lock);
voltag_retry:
memset(ch_cmd, 0, sizeof(ch_cmd));
ch_cmd[0] = READ_ELEMENT_STATUS;
ch_cmd[1] = (ch->device->lun << 5) |
(ch->voltags ? 0x10 : 0) |
ch_elem_to_typecode(ch,elem);
ch_cmd[2] = (elem >> 8) & 0xff;
ch_cmd[3] = elem & 0xff;
ch_cmd[5] = 1;
ch_cmd[9] = 255;
result = ch_do_scsi(ch, ch_cmd, buffer, 256, DMA_FROM_DEVICE);
if (!result) {
cge.cge_status = buffer[18];
cge.cge_flags = 0;
if (buffer[18] & CESTATUS_EXCEPT) {
cge.cge_errno = EIO;
}
if (buffer[25] & 0x80) {
cge.cge_flags |= CGE_SRC;
if (buffer[25] & 0x40)
cge.cge_flags |= CGE_INVERT;
elem = (buffer[26]<<8) | buffer[27];
for (i = 0; i < 4; i++) {
if (elem >= ch->firsts[i] &&
elem < ch->firsts[i] + ch->counts[i]) {
cge.cge_srctype = i;
cge.cge_srcunit = elem-ch->firsts[i];
}
}
}
if ((buffer[22] & 0x30) == 0x30) {
cge.cge_flags |= CGE_IDLUN;
cge.cge_id = buffer[23];
cge.cge_lun = buffer[22] & 7;
}
if (buffer[9] & 0x80) {
cge.cge_flags |= CGE_PVOLTAG;
memcpy(cge.cge_pvoltag,buffer+28,36);
}
if (buffer[9] & 0x40) {
cge.cge_flags |= CGE_AVOLTAG;
memcpy(cge.cge_avoltag,buffer+64,36);
}
} else if (ch->voltags) {
ch->voltags = 0;
vprintk("device has no volume tag support\n");
goto voltag_retry;
}
kfree(buffer);
mutex_unlock(&ch->lock);
if (copy_to_user(argp, &cge, sizeof (cge)))
return -EFAULT;
return result;
}
case CHIOINITELEM:
{
mutex_lock(&ch->lock);
retval = ch_init_elem(ch);
mutex_unlock(&ch->lock);
return retval;
}
case CHIOSVOLTAG:
{
struct changer_set_voltag csv;
int elem;
if (copy_from_user(&csv, argp, sizeof(csv)))
return -EFAULT;
if (0 != ch_checkrange(ch, csv.csv_type, csv.csv_unit)) {
dprintk("CHIOSVOLTAG: invalid parameter\n");
return -EBADSLT;
}
elem = ch->firsts[csv.csv_type] + csv.csv_unit;
mutex_lock(&ch->lock);
retval = ch_set_voltag(ch, elem,
csv.csv_flags & CSV_AVOLTAG,
csv.csv_flags & CSV_CLEARTAG,
csv.csv_voltag);
mutex_unlock(&ch->lock);
return retval;
}
default:
return scsi_ioctl(ch->device, cmd, argp);
}
}
#ifdef CONFIG_COMPAT
struct changer_element_status32 {
int ces_type;
compat_uptr_t ces_data;
};
#define CHIOGSTATUS32 _IOW('c', 8,struct changer_element_status32)
static long ch_ioctl_compat(struct file * file,
unsigned int cmd, unsigned long arg)
{
scsi_changer *ch = file->private_data;
switch (cmd) {
case CHIOGPARAMS:
case CHIOGVPARAMS:
case CHIOPOSITION:
case CHIOMOVE:
case CHIOEXCHANGE:
case CHIOGELEM:
case CHIOINITELEM:
case CHIOSVOLTAG:
/* compatible */
return ch_ioctl(file, cmd, arg);
case CHIOGSTATUS32:
{
struct changer_element_status32 ces32;
unsigned char __user *data;
if (copy_from_user(&ces32, (void __user *)arg, sizeof (ces32)))
return -EFAULT;
if (ces32.ces_type < 0 || ces32.ces_type >= CH_TYPES)
return -EINVAL;
data = compat_ptr(ces32.ces_data);
return ch_gstatus(ch, ces32.ces_type, data);
}
default:
// return scsi_ioctl_compat(ch->device, cmd, (void*)arg);
return -ENOIOCTLCMD;
}
}
#endif
/* ------------------------------------------------------------------------ */
static int ch_probe(struct device *dev)
{
struct scsi_device *sd = to_scsi_device(dev);
struct device *class_dev;
[SCSI] ch: fix device minor number management bug ch_probe uses the total number of ch devices as minor. ch_probe: ch->minor = ch_devcount; ... ch_devcount++; Then ch_remove decreases ch_devcount: ch_remove: ch_devcount--; If you have two ch devices, sch0 and sch1, and remove sch0, ch_devcount is 1. Then if you add another ch device, ch_probe tries to create sch1. So you get a warning and fail to create sch1: Jan 24 16:01:05 nice kernel: sysfs: duplicate filename 'sch1' can not be created Jan 24 16:01:05 nice kernel: WARNING: at fs/sysfs/dir.c:424 sysfs_add_one() Jan 24 16:01:05 nice kernel: Pid: 2571, comm: iscsid Not tainted 2.6.24-rc7-ga3d2c2e8-dirty #1 Jan 24 16:01:05 nice kernel: Jan 24 16:01:05 nice kernel: Call Trace: Jan 24 16:01:05 nice kernel: [<ffffffff802a22b8>] sysfs_add_one+0x54/0xbd Jan 24 16:01:05 nice kernel: [<ffffffff802a283c>] create_dir+0x4f/0x87 Jan 24 16:01:05 nice kernel: [<ffffffff802a28a9>] sysfs_create_dir+0x35/0x4a Jan 24 16:01:05 nice kernel: [<ffffffff803069a1>] kobject_get+0x12/0x17 Jan 24 16:01:05 nice kernel: [<ffffffff80306ece>] kobject_add+0xf3/0x1a6 Jan 24 16:01:05 nice kernel: [<ffffffff8034252b>] class_device_add+0xaa/0x39d Jan 24 16:01:05 nice kernel: [<ffffffff803428fb>] class_device_create+0xcb/0xfa Jan 24 16:01:05 nice kernel: [<ffffffff80229e09>] printk+0x4e/0x56 Jan 24 16:01:05 nice kernel: [<ffffffff802a2054>] sysfs_ilookup_test+0x0/0xf Jan 24 16:01:05 nice kernel: [<ffffffff88022580>] :ch:ch_probe+0xbe/0x61a (snip) This patch converts ch to use a standard minor number management way, idr like sg and bsg. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-24 16:24:50 +08:00
int minor, ret = -ENOMEM;
scsi_changer *ch;
if (sd->type != TYPE_MEDIUM_CHANGER)
return -ENODEV;
ch = kzalloc(sizeof(*ch), GFP_KERNEL);
if (NULL == ch)
return -ENOMEM;
[SCSI] ch: fix device minor number management bug ch_probe uses the total number of ch devices as minor. ch_probe: ch->minor = ch_devcount; ... ch_devcount++; Then ch_remove decreases ch_devcount: ch_remove: ch_devcount--; If you have two ch devices, sch0 and sch1, and remove sch0, ch_devcount is 1. Then if you add another ch device, ch_probe tries to create sch1. So you get a warning and fail to create sch1: Jan 24 16:01:05 nice kernel: sysfs: duplicate filename 'sch1' can not be created Jan 24 16:01:05 nice kernel: WARNING: at fs/sysfs/dir.c:424 sysfs_add_one() Jan 24 16:01:05 nice kernel: Pid: 2571, comm: iscsid Not tainted 2.6.24-rc7-ga3d2c2e8-dirty #1 Jan 24 16:01:05 nice kernel: Jan 24 16:01:05 nice kernel: Call Trace: Jan 24 16:01:05 nice kernel: [<ffffffff802a22b8>] sysfs_add_one+0x54/0xbd Jan 24 16:01:05 nice kernel: [<ffffffff802a283c>] create_dir+0x4f/0x87 Jan 24 16:01:05 nice kernel: [<ffffffff802a28a9>] sysfs_create_dir+0x35/0x4a Jan 24 16:01:05 nice kernel: [<ffffffff803069a1>] kobject_get+0x12/0x17 Jan 24 16:01:05 nice kernel: [<ffffffff80306ece>] kobject_add+0xf3/0x1a6 Jan 24 16:01:05 nice kernel: [<ffffffff8034252b>] class_device_add+0xaa/0x39d Jan 24 16:01:05 nice kernel: [<ffffffff803428fb>] class_device_create+0xcb/0xfa Jan 24 16:01:05 nice kernel: [<ffffffff80229e09>] printk+0x4e/0x56 Jan 24 16:01:05 nice kernel: [<ffffffff802a2054>] sysfs_ilookup_test+0x0/0xf Jan 24 16:01:05 nice kernel: [<ffffffff88022580>] :ch:ch_probe+0xbe/0x61a (snip) This patch converts ch to use a standard minor number management way, idr like sg and bsg. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-24 16:24:50 +08:00
if (!idr_pre_get(&ch_index_idr, GFP_KERNEL))
goto free_ch;
spin_lock(&ch_index_lock);
ret = idr_get_new(&ch_index_idr, ch, &minor);
spin_unlock(&ch_index_lock);
if (ret)
goto free_ch;
if (minor > CH_MAX_DEVS) {
ret = -ENODEV;
goto remove_idr;
}
ch->minor = minor;
sprintf(ch->name,"ch%d",ch->minor);
class_dev = device_create(ch_sysfs_class, dev,
MKDEV(SCSI_CHANGER_MAJOR, ch->minor), ch,
"s%s", ch->name);
if (IS_ERR(class_dev)) {
printk(KERN_WARNING "ch%d: device_create failed\n",
ch->minor);
[SCSI] ch: fix device minor number management bug ch_probe uses the total number of ch devices as minor. ch_probe: ch->minor = ch_devcount; ... ch_devcount++; Then ch_remove decreases ch_devcount: ch_remove: ch_devcount--; If you have two ch devices, sch0 and sch1, and remove sch0, ch_devcount is 1. Then if you add another ch device, ch_probe tries to create sch1. So you get a warning and fail to create sch1: Jan 24 16:01:05 nice kernel: sysfs: duplicate filename 'sch1' can not be created Jan 24 16:01:05 nice kernel: WARNING: at fs/sysfs/dir.c:424 sysfs_add_one() Jan 24 16:01:05 nice kernel: Pid: 2571, comm: iscsid Not tainted 2.6.24-rc7-ga3d2c2e8-dirty #1 Jan 24 16:01:05 nice kernel: Jan 24 16:01:05 nice kernel: Call Trace: Jan 24 16:01:05 nice kernel: [<ffffffff802a22b8>] sysfs_add_one+0x54/0xbd Jan 24 16:01:05 nice kernel: [<ffffffff802a283c>] create_dir+0x4f/0x87 Jan 24 16:01:05 nice kernel: [<ffffffff802a28a9>] sysfs_create_dir+0x35/0x4a Jan 24 16:01:05 nice kernel: [<ffffffff803069a1>] kobject_get+0x12/0x17 Jan 24 16:01:05 nice kernel: [<ffffffff80306ece>] kobject_add+0xf3/0x1a6 Jan 24 16:01:05 nice kernel: [<ffffffff8034252b>] class_device_add+0xaa/0x39d Jan 24 16:01:05 nice kernel: [<ffffffff803428fb>] class_device_create+0xcb/0xfa Jan 24 16:01:05 nice kernel: [<ffffffff80229e09>] printk+0x4e/0x56 Jan 24 16:01:05 nice kernel: [<ffffffff802a2054>] sysfs_ilookup_test+0x0/0xf Jan 24 16:01:05 nice kernel: [<ffffffff88022580>] :ch:ch_probe+0xbe/0x61a (snip) This patch converts ch to use a standard minor number management way, idr like sg and bsg. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-24 16:24:50 +08:00
ret = PTR_ERR(class_dev);
goto remove_idr;
}
mutex_init(&ch->lock);
ch->device = sd;
ch_readconfig(ch);
if (init)
ch_init_elem(ch);
dev_set_drvdata(dev, ch);
sdev_printk(KERN_INFO, sd, "Attached scsi changer %s\n", ch->name);
return 0;
[SCSI] ch: fix device minor number management bug ch_probe uses the total number of ch devices as minor. ch_probe: ch->minor = ch_devcount; ... ch_devcount++; Then ch_remove decreases ch_devcount: ch_remove: ch_devcount--; If you have two ch devices, sch0 and sch1, and remove sch0, ch_devcount is 1. Then if you add another ch device, ch_probe tries to create sch1. So you get a warning and fail to create sch1: Jan 24 16:01:05 nice kernel: sysfs: duplicate filename 'sch1' can not be created Jan 24 16:01:05 nice kernel: WARNING: at fs/sysfs/dir.c:424 sysfs_add_one() Jan 24 16:01:05 nice kernel: Pid: 2571, comm: iscsid Not tainted 2.6.24-rc7-ga3d2c2e8-dirty #1 Jan 24 16:01:05 nice kernel: Jan 24 16:01:05 nice kernel: Call Trace: Jan 24 16:01:05 nice kernel: [<ffffffff802a22b8>] sysfs_add_one+0x54/0xbd Jan 24 16:01:05 nice kernel: [<ffffffff802a283c>] create_dir+0x4f/0x87 Jan 24 16:01:05 nice kernel: [<ffffffff802a28a9>] sysfs_create_dir+0x35/0x4a Jan 24 16:01:05 nice kernel: [<ffffffff803069a1>] kobject_get+0x12/0x17 Jan 24 16:01:05 nice kernel: [<ffffffff80306ece>] kobject_add+0xf3/0x1a6 Jan 24 16:01:05 nice kernel: [<ffffffff8034252b>] class_device_add+0xaa/0x39d Jan 24 16:01:05 nice kernel: [<ffffffff803428fb>] class_device_create+0xcb/0xfa Jan 24 16:01:05 nice kernel: [<ffffffff80229e09>] printk+0x4e/0x56 Jan 24 16:01:05 nice kernel: [<ffffffff802a2054>] sysfs_ilookup_test+0x0/0xf Jan 24 16:01:05 nice kernel: [<ffffffff88022580>] :ch:ch_probe+0xbe/0x61a (snip) This patch converts ch to use a standard minor number management way, idr like sg and bsg. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-24 16:24:50 +08:00
remove_idr:
idr_remove(&ch_index_idr, minor);
free_ch:
kfree(ch);
return ret;
}
static int ch_remove(struct device *dev)
{
[SCSI] ch: fix device minor number management bug ch_probe uses the total number of ch devices as minor. ch_probe: ch->minor = ch_devcount; ... ch_devcount++; Then ch_remove decreases ch_devcount: ch_remove: ch_devcount--; If you have two ch devices, sch0 and sch1, and remove sch0, ch_devcount is 1. Then if you add another ch device, ch_probe tries to create sch1. So you get a warning and fail to create sch1: Jan 24 16:01:05 nice kernel: sysfs: duplicate filename 'sch1' can not be created Jan 24 16:01:05 nice kernel: WARNING: at fs/sysfs/dir.c:424 sysfs_add_one() Jan 24 16:01:05 nice kernel: Pid: 2571, comm: iscsid Not tainted 2.6.24-rc7-ga3d2c2e8-dirty #1 Jan 24 16:01:05 nice kernel: Jan 24 16:01:05 nice kernel: Call Trace: Jan 24 16:01:05 nice kernel: [<ffffffff802a22b8>] sysfs_add_one+0x54/0xbd Jan 24 16:01:05 nice kernel: [<ffffffff802a283c>] create_dir+0x4f/0x87 Jan 24 16:01:05 nice kernel: [<ffffffff802a28a9>] sysfs_create_dir+0x35/0x4a Jan 24 16:01:05 nice kernel: [<ffffffff803069a1>] kobject_get+0x12/0x17 Jan 24 16:01:05 nice kernel: [<ffffffff80306ece>] kobject_add+0xf3/0x1a6 Jan 24 16:01:05 nice kernel: [<ffffffff8034252b>] class_device_add+0xaa/0x39d Jan 24 16:01:05 nice kernel: [<ffffffff803428fb>] class_device_create+0xcb/0xfa Jan 24 16:01:05 nice kernel: [<ffffffff80229e09>] printk+0x4e/0x56 Jan 24 16:01:05 nice kernel: [<ffffffff802a2054>] sysfs_ilookup_test+0x0/0xf Jan 24 16:01:05 nice kernel: [<ffffffff88022580>] :ch:ch_probe+0xbe/0x61a (snip) This patch converts ch to use a standard minor number management way, idr like sg and bsg. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-24 16:24:50 +08:00
scsi_changer *ch = dev_get_drvdata(dev);
[SCSI] ch: fix device minor number management bug ch_probe uses the total number of ch devices as minor. ch_probe: ch->minor = ch_devcount; ... ch_devcount++; Then ch_remove decreases ch_devcount: ch_remove: ch_devcount--; If you have two ch devices, sch0 and sch1, and remove sch0, ch_devcount is 1. Then if you add another ch device, ch_probe tries to create sch1. So you get a warning and fail to create sch1: Jan 24 16:01:05 nice kernel: sysfs: duplicate filename 'sch1' can not be created Jan 24 16:01:05 nice kernel: WARNING: at fs/sysfs/dir.c:424 sysfs_add_one() Jan 24 16:01:05 nice kernel: Pid: 2571, comm: iscsid Not tainted 2.6.24-rc7-ga3d2c2e8-dirty #1 Jan 24 16:01:05 nice kernel: Jan 24 16:01:05 nice kernel: Call Trace: Jan 24 16:01:05 nice kernel: [<ffffffff802a22b8>] sysfs_add_one+0x54/0xbd Jan 24 16:01:05 nice kernel: [<ffffffff802a283c>] create_dir+0x4f/0x87 Jan 24 16:01:05 nice kernel: [<ffffffff802a28a9>] sysfs_create_dir+0x35/0x4a Jan 24 16:01:05 nice kernel: [<ffffffff803069a1>] kobject_get+0x12/0x17 Jan 24 16:01:05 nice kernel: [<ffffffff80306ece>] kobject_add+0xf3/0x1a6 Jan 24 16:01:05 nice kernel: [<ffffffff8034252b>] class_device_add+0xaa/0x39d Jan 24 16:01:05 nice kernel: [<ffffffff803428fb>] class_device_create+0xcb/0xfa Jan 24 16:01:05 nice kernel: [<ffffffff80229e09>] printk+0x4e/0x56 Jan 24 16:01:05 nice kernel: [<ffffffff802a2054>] sysfs_ilookup_test+0x0/0xf Jan 24 16:01:05 nice kernel: [<ffffffff88022580>] :ch:ch_probe+0xbe/0x61a (snip) This patch converts ch to use a standard minor number management way, idr like sg and bsg. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-24 16:24:50 +08:00
spin_lock(&ch_index_lock);
idr_remove(&ch_index_idr, ch->minor);
spin_unlock(&ch_index_lock);
device_destroy(ch_sysfs_class, MKDEV(SCSI_CHANGER_MAJOR,ch->minor));
kfree(ch->dt);
kfree(ch);
return 0;
}
static struct scsi_driver ch_template = {
.owner = THIS_MODULE,
.gendrv = {
.name = "ch",
.probe = ch_probe,
.remove = ch_remove,
},
};
static const struct file_operations changer_fops = {
.owner = THIS_MODULE,
.open = ch_open,
.release = ch_release,
.unlocked_ioctl = ch_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = ch_ioctl_compat,
#endif
};
static int __init init_ch_module(void)
{
int rc;
printk(KERN_INFO "SCSI Media Changer driver v" VERSION " \n");
ch_sysfs_class = class_create(THIS_MODULE, "scsi_changer");
if (IS_ERR(ch_sysfs_class)) {
rc = PTR_ERR(ch_sysfs_class);
return rc;
}
rc = register_chrdev(SCSI_CHANGER_MAJOR,"ch",&changer_fops);
if (rc < 0) {
printk("Unable to get major %d for SCSI-Changer\n",
SCSI_CHANGER_MAJOR);
goto fail1;
}
rc = scsi_register_driver(&ch_template.gendrv);
if (rc < 0)
goto fail2;
return 0;
fail2:
unregister_chrdev(SCSI_CHANGER_MAJOR, "ch");
fail1:
class_destroy(ch_sysfs_class);
return rc;
}
static void __exit exit_ch_module(void)
{
scsi_unregister_driver(&ch_template.gendrv);
unregister_chrdev(SCSI_CHANGER_MAJOR, "ch");
class_destroy(ch_sysfs_class);
[SCSI] ch: fix device minor number management bug ch_probe uses the total number of ch devices as minor. ch_probe: ch->minor = ch_devcount; ... ch_devcount++; Then ch_remove decreases ch_devcount: ch_remove: ch_devcount--; If you have two ch devices, sch0 and sch1, and remove sch0, ch_devcount is 1. Then if you add another ch device, ch_probe tries to create sch1. So you get a warning and fail to create sch1: Jan 24 16:01:05 nice kernel: sysfs: duplicate filename 'sch1' can not be created Jan 24 16:01:05 nice kernel: WARNING: at fs/sysfs/dir.c:424 sysfs_add_one() Jan 24 16:01:05 nice kernel: Pid: 2571, comm: iscsid Not tainted 2.6.24-rc7-ga3d2c2e8-dirty #1 Jan 24 16:01:05 nice kernel: Jan 24 16:01:05 nice kernel: Call Trace: Jan 24 16:01:05 nice kernel: [<ffffffff802a22b8>] sysfs_add_one+0x54/0xbd Jan 24 16:01:05 nice kernel: [<ffffffff802a283c>] create_dir+0x4f/0x87 Jan 24 16:01:05 nice kernel: [<ffffffff802a28a9>] sysfs_create_dir+0x35/0x4a Jan 24 16:01:05 nice kernel: [<ffffffff803069a1>] kobject_get+0x12/0x17 Jan 24 16:01:05 nice kernel: [<ffffffff80306ece>] kobject_add+0xf3/0x1a6 Jan 24 16:01:05 nice kernel: [<ffffffff8034252b>] class_device_add+0xaa/0x39d Jan 24 16:01:05 nice kernel: [<ffffffff803428fb>] class_device_create+0xcb/0xfa Jan 24 16:01:05 nice kernel: [<ffffffff80229e09>] printk+0x4e/0x56 Jan 24 16:01:05 nice kernel: [<ffffffff802a2054>] sysfs_ilookup_test+0x0/0xf Jan 24 16:01:05 nice kernel: [<ffffffff88022580>] :ch:ch_probe+0xbe/0x61a (snip) This patch converts ch to use a standard minor number management way, idr like sg and bsg. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-24 16:24:50 +08:00
idr_destroy(&ch_index_idr);
}
module_init(init_ch_module);
module_exit(exit_ch_module);
/*
* Local variables:
* c-basic-offset: 8
* End:
*/