#define IDETAPE_VERSION "1.19"
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
+#include <linux/jiffies.h>
#include <linux/major.h>
-#include <linux/devfs_fs_kernel.h>
#include <linux/errno.h>
#include <linux/genhd.h>
#include <linux/slab.h>
#include <linux/smp_lock.h>
#include <linux/completion.h>
#include <linux/bitops.h>
+#include <linux/mutex.h>
#include <asm/byteorder.h>
#include <asm/irq.h>
int debug_level;
} idetape_tape_t;
-static DECLARE_MUTEX(idetape_ref_sem);
+static DEFINE_MUTEX(idetape_ref_mutex);
static struct class *idetape_sysfs_class;
{
struct ide_tape_obj *tape = NULL;
- down(&idetape_ref_sem);
+ mutex_lock(&idetape_ref_mutex);
tape = ide_tape_g(disk);
if (tape)
kref_get(&tape->kref);
- up(&idetape_ref_sem);
+ mutex_unlock(&idetape_ref_mutex);
return tape;
}
static void ide_tape_put(struct ide_tape_obj *tape)
{
- down(&idetape_ref_sem);
+ mutex_lock(&idetape_ref_mutex);
kref_put(&tape->kref, ide_tape_release);
- up(&idetape_ref_sem);
+ mutex_unlock(&idetape_ref_mutex);
}
/*
{
struct ide_tape_obj *tape = NULL;
- down(&idetape_ref_sem);
+ mutex_lock(&idetape_ref_mutex);
tape = idetape_devs[i];
if (tape)
kref_get(&tape->kref);
- up(&idetape_ref_sem);
+ mutex_unlock(&idetape_ref_mutex);
return tape;
}
static void idetape_init_rq(struct request *rq, u8 cmd)
{
memset(rq, 0, sizeof(*rq));
- rq->flags = REQ_SPECIAL;
+ rq->cmd_type = REQ_TYPE_SPECIAL;
rq->cmd[0] = cmd;
}
}
if (time_after(jiffies, tape->insert_time))
tape->insert_speed = tape->insert_size / 1024 * HZ / (jiffies - tape->insert_time);
- if (jiffies - tape->avg_time >= HZ) {
+ if (time_after_eq(jiffies, tape->avg_time + HZ)) {
tape->avg_speed = tape->avg_size * HZ / (jiffies - tape->avg_time) / 1024;
tape->avg_size = 0;
tape->avg_time = jiffies;
#if IDETAPE_DEBUG_LOG
#if 0
if (tape->debug_level >= 5)
- printk(KERN_INFO "ide-tape: rq_status: %d, "
- "dev: %s, cmd: %ld, errors: %d\n", rq->rq_status,
+ printk(KERN_INFO "ide-tape: %d, "
+ "dev: %s, cmd: %ld, errors: %d\n",
rq->rq_disk->disk_name, rq->cmd[0], rq->errors);
#endif
if (tape->debug_level >= 2)
rq->sector, rq->nr_sectors, rq->current_nr_sectors);
#endif /* IDETAPE_DEBUG_LOG */
- if ((rq->flags & REQ_SPECIAL) == 0) {
+ if (!blk_special_request(rq)) {
/*
* We do not support buffer cache originated requests.
*/
printk(KERN_NOTICE "ide-tape: %s: Unsupported request in "
- "request queue (%ld)\n", drive->name, rq->flags);
+ "request queue (%d)\n", drive->name, rq->cmd_type);
ide_end_request(drive, 0, 0);
return ide_stopped;
}
} else {
return ide_do_reset(drive);
}
- } else if (jiffies - tape->dsc_polling_start > IDETAPE_DSC_MA_THRESHOLD)
+ } else if (time_after(jiffies, tape->dsc_polling_start + IDETAPE_DSC_MA_THRESHOLD))
tape->dsc_polling_frequency = IDETAPE_DSC_MA_SLOW;
idetape_postpone_request(drive);
return ide_stopped;
int pages = tape->pages_per_stage;
char *b_data = NULL;
- if ((stage = (idetape_stage_t *) kmalloc (sizeof (idetape_stage_t),GFP_KERNEL)) == NULL)
+ if ((stage = kmalloc(sizeof (idetape_stage_t),GFP_KERNEL)) == NULL)
return NULL;
stage->next = NULL;
- bh = stage->bh = (struct idetape_bh *)kmalloc(sizeof(struct idetape_bh), GFP_KERNEL);
+ bh = stage->bh = kmalloc(sizeof(struct idetape_bh), GFP_KERNEL);
if (bh == NULL)
goto abort;
bh->b_reqnext = NULL;
continue;
}
prev_bh = bh;
- if ((bh = (struct idetape_bh *)kmalloc(sizeof(struct idetape_bh), GFP_KERNEL)) == NULL) {
+ if ((bh = kmalloc(sizeof(struct idetape_bh), GFP_KERNEL)) == NULL) {
free_page((unsigned long) b_data);
goto abort;
}
return __idetape_kmalloc_stage(tape, 0, 0);
}
-static void idetape_copy_stage_from_user (idetape_tape_t *tape, idetape_stage_t *stage, const char __user *buf, int n)
+static int idetape_copy_stage_from_user (idetape_tape_t *tape, idetape_stage_t *stage, const char __user *buf, int n)
{
struct idetape_bh *bh = tape->bh;
int count;
+ int ret = 0;
while (n) {
#if IDETAPE_DEBUG_BUGS
if (bh == NULL) {
printk(KERN_ERR "ide-tape: bh == NULL in "
"idetape_copy_stage_from_user\n");
- return;
+ return 1;
}
#endif /* IDETAPE_DEBUG_BUGS */
count = min((unsigned int)(bh->b_size - atomic_read(&bh->b_count)), (unsigned int)n);
- copy_from_user(bh->b_data + atomic_read(&bh->b_count), buf, count);
+ if (copy_from_user(bh->b_data + atomic_read(&bh->b_count), buf, count))
+ ret = 1;
n -= count;
atomic_add(count, &bh->b_count);
buf += count;
}
}
tape->bh = bh;
+ return ret;
}
-static void idetape_copy_stage_to_user (idetape_tape_t *tape, char __user *buf, idetape_stage_t *stage, int n)
+static int idetape_copy_stage_to_user (idetape_tape_t *tape, char __user *buf, idetape_stage_t *stage, int n)
{
struct idetape_bh *bh = tape->bh;
int count;
+ int ret = 0;
while (n) {
#if IDETAPE_DEBUG_BUGS
if (bh == NULL) {
printk(KERN_ERR "ide-tape: bh == NULL in "
"idetape_copy_stage_to_user\n");
- return;
+ return 1;
}
#endif /* IDETAPE_DEBUG_BUGS */
count = min(tape->b_count, n);
- copy_to_user(buf, tape->b_data, count);
+ if (copy_to_user(buf, tape->b_data, count))
+ ret = 1;
n -= count;
tape->b_data += count;
tape->b_count -= count;
}
}
}
+ return ret;
}
static void idetape_init_merge_stage (idetape_tape_t *tape)
*/
static void idetape_wait_for_request (ide_drive_t *drive, struct request *rq)
{
- DECLARE_COMPLETION(wait);
+ DECLARE_COMPLETION_ONSTACK(wait);
idetape_tape_t *tape = drive->driver_data;
#if IDETAPE_DEBUG_BUGS
- if (rq == NULL || (rq->flags & REQ_SPECIAL) == 0) {
+ if (rq == NULL || !blk_special_request(rq)) {
printk (KERN_ERR "ide-tape: bug: Trying to sleep on non-valid request\n");
return;
}
#endif /* IDETAPE_DEBUG_BUGS */
- rq->waiting = &wait;
+ rq->end_io_data = &wait;
rq->end_io = blk_end_sync_rq;
spin_unlock_irq(&tape->spinlock);
wait_for_completion(&wait);
struct ide_tape_obj *tape = ide_tape_f(file);
ide_drive_t *drive = tape->drive;
ssize_t bytes_read,temp, actually_read = 0, rc;
+ ssize_t ret = 0;
#if IDETAPE_DEBUG_LOG
if (tape->debug_level >= 3)
return (0);
if (tape->merge_stage_size) {
actually_read = min((unsigned int)(tape->merge_stage_size), (unsigned int)count);
- idetape_copy_stage_to_user(tape, buf, tape->merge_stage, actually_read);
+ if (idetape_copy_stage_to_user(tape, buf, tape->merge_stage, actually_read))
+ ret = -EFAULT;
buf += actually_read;
tape->merge_stage_size -= actually_read;
count -= actually_read;
bytes_read = idetape_add_chrdev_read_request(drive, tape->capabilities.ctl);
if (bytes_read <= 0)
goto finish;
- idetape_copy_stage_to_user(tape, buf, tape->merge_stage, bytes_read);
+ if (idetape_copy_stage_to_user(tape, buf, tape->merge_stage, bytes_read))
+ ret = -EFAULT;
buf += bytes_read;
count -= bytes_read;
actually_read += bytes_read;
if (bytes_read <= 0)
goto finish;
temp = min((unsigned long)count, (unsigned long)bytes_read);
- idetape_copy_stage_to_user(tape, buf, tape->merge_stage, temp);
+ if (idetape_copy_stage_to_user(tape, buf, tape->merge_stage, temp))
+ ret = -EFAULT;
actually_read += temp;
tape->merge_stage_size = bytes_read-temp;
}
idetape_space_over_filemarks(drive, MTFSF, 1);
return 0;
}
- return actually_read;
+
+ return (ret) ? ret : actually_read;
}
static ssize_t idetape_chrdev_write (struct file *file, const char __user *buf,
{
struct ide_tape_obj *tape = ide_tape_f(file);
ide_drive_t *drive = tape->drive;
- ssize_t retval, actually_written = 0;
+ ssize_t actually_written = 0;
+ ssize_t ret = 0;
/* The drive is write protected. */
if (tape->write_prot)
* some drives (Seagate STT3401A) will return an error.
*/
if (drive->dsc_overlap) {
- retval = idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE, 0, tape->merge_stage->bh);
+ ssize_t retval = idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE, 0, tape->merge_stage->bh);
if (retval < 0) {
__idetape_kfree_stage(tape->merge_stage);
tape->merge_stage = NULL;
}
#endif /* IDETAPE_DEBUG_BUGS */
actually_written = min((unsigned int)(tape->stage_size - tape->merge_stage_size), (unsigned int)count);
- idetape_copy_stage_from_user(tape, tape->merge_stage, buf, actually_written);
+ if (idetape_copy_stage_from_user(tape, tape->merge_stage, buf, actually_written))
+ ret = -EFAULT;
buf += actually_written;
tape->merge_stage_size += actually_written;
count -= actually_written;
if (tape->merge_stage_size == tape->stage_size) {
+ ssize_t retval;
tape->merge_stage_size = 0;
retval = idetape_add_chrdev_write_request(drive, tape->capabilities.ctl);
if (retval <= 0)
}
}
while (count >= tape->stage_size) {
- idetape_copy_stage_from_user(tape, tape->merge_stage, buf, tape->stage_size);
+ ssize_t retval;
+ if (idetape_copy_stage_from_user(tape, tape->merge_stage, buf, tape->stage_size))
+ ret = -EFAULT;
buf += tape->stage_size;
count -= tape->stage_size;
retval = idetape_add_chrdev_write_request(drive, tape->capabilities.ctl);
}
if (count) {
actually_written += count;
- idetape_copy_stage_from_user(tape, tape->merge_stage, buf, count);
+ if (idetape_copy_stage_from_user(tape, tape->merge_stage, buf, count))
+ ret = -EFAULT;
tape->merge_stage_size += count;
}
- return (actually_written);
+ return (ret) ? ret : actually_written;
}
static int idetape_write_filemark (ide_drive_t *drive)
MKDEV(IDETAPE_MAJOR, tape->minor));
class_device_destroy(idetape_sysfs_class,
MKDEV(IDETAPE_MAJOR, tape->minor + 128));
- devfs_remove("%s/mt", drive->devfs_name);
- devfs_remove("%s/mtn", drive->devfs_name);
- devfs_unregister_tape(g->number);
idetape_devs[tape->minor] = NULL;
g->private_data = NULL;
put_disk(g);
printk(KERN_WARNING "ide-tape: Use drive %s with ide-scsi emulation and osst.\n", drive->name);
printk(KERN_WARNING "ide-tape: OnStream support will be removed soon from ide-tape!\n");
}
- tape = (idetape_tape_t *) kzalloc (sizeof (idetape_tape_t), GFP_KERNEL);
+ tape = kzalloc(sizeof (idetape_tape_t), GFP_KERNEL);
if (tape == NULL) {
printk(KERN_ERR "ide-tape: %s: Can't allocate a tape structure\n", drive->name);
goto failed;
drive->driver_data = tape;
- down(&idetape_ref_sem);
+ mutex_lock(&idetape_ref_mutex);
for (minor = 0; idetape_devs[minor]; minor++)
;
idetape_devs[minor] = tape;
- up(&idetape_ref_sem);
+ mutex_unlock(&idetape_ref_mutex);
idetape_setup(drive, tape, minor);
class_device_create(idetape_sysfs_class, NULL,
MKDEV(IDETAPE_MAJOR, minor + 128), &drive->gendev, "n%s", tape->name);
- devfs_mk_cdev(MKDEV(HWIF(drive)->major, minor),
- S_IFCHR | S_IRUGO | S_IWUGO,
- "%s/mt", drive->devfs_name);
- devfs_mk_cdev(MKDEV(HWIF(drive)->major, minor + 128),
- S_IFCHR | S_IRUGO | S_IWUGO,
- "%s/mtn", drive->devfs_name);
-
- g->number = devfs_register_tape(drive->devfs_name);
g->fops = &idetape_block_ops;
ide_register_region(g);
git://git.onelab.eu / linux-2.6.git / blobdiff