ide: split off ioctl handling from IDE settings (v2)
* do write permission and min/max checks in ide_procset_t functions
* ide-disk.c: drive->id is always available so cleanup "multcount" setting
accordingly
* ide-disk.c: "address" setting was incorrectly defined as type TYPE_INTA,
fix it by using type TYPE_BYTE and updating ide_drive_t->adressing field,
the bug didn't trigger because this IDE setting uses custom ->set function
* ide.c: add set_ksettings() for handling HDIO_SET_KEEPSETTINGS ioctl
* ide.c: add set_unmaskirq() for handling HDIO_SET_UNMASKINTR ioctl
* handle ioctls directly in generic_ide_ioclt() and idedisk_ioctl()
instead of using IDE settings to deal with them
* remove no longer needed ide_find_setting_by_ioctl() and {read,write}_ioctl
fields from ide_settings_t, also remove now unused TYPE_INTA handling
v2:
* add missing EXPORT_SYMBOL_GPL(ide_setting_sem) needed now for ide-disk
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index 7a96f6f..8793a96 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -823,13 +823,13 @@
DECLARE_MUTEX(ide_setting_sem);
+EXPORT_SYMBOL_GPL(ide_setting_sem);
+
/**
* __ide_add_setting - add an ide setting option
* @drive: drive to use
* @name: setting name
* @rw: true if the function is read write
- * @read_ioctl: function to call on read
- * @write_ioctl: function to call on write
* @data_type: type of data
* @min: range minimum
* @max: range maximum
@@ -850,7 +850,7 @@
* remove.
*/
-static int __ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set, int auto_remove)
+static int __ide_add_setting(ide_drive_t *drive, const char *name, int rw, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set, int auto_remove)
{
ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
@@ -863,8 +863,6 @@
goto abort;
strcpy(setting->name, name);
setting->rw = rw;
- setting->read_ioctl = read_ioctl;
- setting->write_ioctl = write_ioctl;
setting->data_type = data_type;
setting->min = min;
setting->max = max;
@@ -885,9 +883,9 @@
return -1;
}
-int ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set)
+int ide_add_setting(ide_drive_t *drive, const char *name, int rw, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set)
{
- return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
+ return __ide_add_setting(drive, name, rw, data_type, min, max, mul_factor, div_factor, data, set, 1);
}
EXPORT_SYMBOL(ide_add_setting);
@@ -919,29 +917,6 @@
}
/**
- * ide_find_setting_by_ioctl - find a drive specific ioctl
- * @drive: drive to scan
- * @cmd: ioctl command to handle
- *
- * Scan's the device setting table for a matching entry and returns
- * this or NULL if no entry is found. The caller must hold the
- * setting semaphore
- */
-
-static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
-{
- ide_settings_t *setting = drive->settings;
-
- while (setting) {
- if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
- break;
- setting = setting->next;
- }
-
- return setting;
-}
-
-/**
* ide_find_setting_by_name - find a drive specific setting
* @drive: drive to scan
* @name: setting name
@@ -1014,7 +989,6 @@
val = *((u16 *) setting->data);
break;
case TYPE_INT:
- case TYPE_INTA:
val = *((u32 *) setting->data);
break;
}
@@ -1076,17 +1050,14 @@
int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
{
- int i;
- u32 *p;
-
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
+ if (setting->set)
+ return setting->set(drive, val);
if (!(setting->rw & SETTING_WRITE))
return -EPERM;
if (val < setting->min || val > setting->max)
return -EINVAL;
- if (setting->set)
- return setting->set(drive, val);
if (ide_spin_wait_hwgroup(drive))
return -EBUSY;
switch (setting->data_type) {
@@ -1099,11 +1070,6 @@
case TYPE_INT:
*((u32 *) setting->data) = val;
break;
- case TYPE_INTA:
- p = (u32 *) setting->data;
- for (i = 0; i < 1 << PARTN_BITS; i++, p++)
- *p = val;
- break;
}
spin_unlock_irq(&ide_lock);
return 0;
@@ -1111,6 +1077,12 @@
static int set_io_32bit(ide_drive_t *drive, int arg)
{
+ if (drive->no_io_32bit)
+ return -EPERM;
+
+ if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
+ return -EINVAL;
+
drive->io_32bit = arg;
#ifdef CONFIG_BLK_DEV_DTC2278
if (HWIF(drive)->chipset == ide_dtc2278)
@@ -1119,12 +1091,28 @@
return 0;
}
+static int set_ksettings(ide_drive_t *drive, int arg)
+{
+ if (arg < 0 || arg > 1)
+ return -EINVAL;
+
+ if (ide_spin_wait_hwgroup(drive))
+ return -EBUSY;
+ drive->keep_settings = arg;
+ spin_unlock_irq(&ide_lock);
+
+ return 0;
+}
+
static int set_using_dma (ide_drive_t *drive, int arg)
{
#ifdef CONFIG_BLK_DEV_IDEDMA
ide_hwif_t *hwif = drive->hwif;
int err = -EPERM;
+ if (arg < 0 || arg > 1)
+ return -EINVAL;
+
if (!drive->id || !(drive->id->capability & 1))
goto out;
@@ -1157,6 +1145,9 @@
out:
return err;
#else
+ if (arg < 0 || arg > 1)
+ return -EINVAL;
+
return -EPERM;
#endif
}
@@ -1165,6 +1156,9 @@
{
struct request rq;
+ if (arg < 0 || arg > 255)
+ return -EINVAL;
+
if (!HWIF(drive)->tuneproc)
return -ENOSYS;
if (drive->special.b.set_tune)
@@ -1176,9 +1170,30 @@
return 0;
}
+static int set_unmaskirq(ide_drive_t *drive, int arg)
+{
+ if (drive->no_unmask)
+ return -EPERM;
+
+ if (arg < 0 || arg > 1)
+ return -EINVAL;
+
+ if (ide_spin_wait_hwgroup(drive))
+ return -EBUSY;
+ drive->unmask = arg;
+ spin_unlock_irq(&ide_lock);
+
+ return 0;
+}
+
static int set_xfer_rate (ide_drive_t *drive, int arg)
{
- int err = ide_wait_cmd(drive,
+ int err;
+
+ if (arg < 0 || arg > 70)
+ return -EINVAL;
+
+ err = ide_wait_cmd(drive,
WIN_SETFEATURES, (u8) arg,
SETFEATURES_XFER, 0, NULL);
@@ -1193,25 +1208,24 @@
* ide_add_generic_settings - generic ide settings
* @drive: drive being configured
*
- * Add the generic parts of the system settings to the /proc files and
- * ioctls for this IDE device. The caller must not be holding the
- * ide_setting_sem.
+ * Add the generic parts of the system settings to the /proc files.
+ * The caller must not be holding the ide_setting_sem.
*/
void ide_add_generic_settings (ide_drive_t *drive)
{
/*
- * drive setting name read/write access read ioctl write ioctl data type min max mul_factor div_factor data pointer set function
+ * drive setting name read/write access data type min max mul_factor div_factor data pointer set function
*/
- __ide_add_setting(drive, "io_32bit", drive->no_io_32bit ? SETTING_READ : SETTING_RW, HDIO_GET_32BIT, HDIO_SET_32BIT, TYPE_BYTE, 0, 1 + (SUPPORT_VLB_SYNC << 1), 1, 1, &drive->io_32bit, set_io_32bit, 0);
- __ide_add_setting(drive, "keepsettings", SETTING_RW, HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL, 0);
- __ide_add_setting(drive, "nice1", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL, 0);
- __ide_add_setting(drive, "pio_mode", SETTING_WRITE, -1, HDIO_SET_PIO_MODE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode, 0);
- __ide_add_setting(drive, "unmaskirq", drive->no_unmask ? SETTING_READ : SETTING_RW, HDIO_GET_UNMASKINTR, HDIO_SET_UNMASKINTR, TYPE_BYTE, 0, 1, 1, 1, &drive->unmask, NULL, 0);
- __ide_add_setting(drive, "using_dma", SETTING_RW, HDIO_GET_DMA, HDIO_SET_DMA, TYPE_BYTE, 0, 1, 1, 1, &drive->using_dma, set_using_dma, 0);
- __ide_add_setting(drive, "init_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->init_speed, NULL, 0);
- __ide_add_setting(drive, "current_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->current_speed, set_xfer_rate, 0);
- __ide_add_setting(drive, "number", SETTING_RW, -1, -1, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL, 0);
+ __ide_add_setting(drive, "io_32bit", drive->no_io_32bit ? SETTING_READ : SETTING_RW, TYPE_BYTE, 0, 1 + (SUPPORT_VLB_SYNC << 1), 1, 1, &drive->io_32bit, set_io_32bit, 0);
+ __ide_add_setting(drive, "keepsettings", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL, 0);
+ __ide_add_setting(drive, "nice1", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL, 0);
+ __ide_add_setting(drive, "pio_mode", SETTING_WRITE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode, 0);
+ __ide_add_setting(drive, "unmaskirq", drive->no_unmask ? SETTING_READ : SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->unmask, NULL, 0);
+ __ide_add_setting(drive, "using_dma", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->using_dma, set_using_dma, 0);
+ __ide_add_setting(drive, "init_speed", SETTING_RW, TYPE_BYTE, 0, 70, 1, 1, &drive->init_speed, NULL, 0);
+ __ide_add_setting(drive, "current_speed", SETTING_RW, TYPE_BYTE, 0, 70, 1, 1, &drive->current_speed, set_xfer_rate, 0);
+ __ide_add_setting(drive, "number", SETTING_RW, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL, 0);
}
/**
@@ -1283,27 +1297,23 @@
int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
unsigned int cmd, unsigned long arg)
{
- ide_settings_t *setting;
+ unsigned long flags;
ide_driver_t *drv;
- int err = 0;
void __user *p = (void __user *)arg;
+ int err = 0, (*setfunc)(ide_drive_t *, int);
+ u8 *val;
- down(&ide_setting_sem);
- if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
- if (cmd == setting->read_ioctl) {
- err = ide_read_setting(drive, setting);
- up(&ide_setting_sem);
- return err >= 0 ? put_user(err, (long __user *)arg) : err;
- } else {
- if (bdev != bdev->bd_contains)
- err = -EINVAL;
- else
- err = ide_write_setting(drive, setting, arg);
- up(&ide_setting_sem);
- return err;
- }
+ switch (cmd) {
+ case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
+ case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
+ case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
+ case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
+ case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
+ case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
+ case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
+ case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
+ case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
}
- up(&ide_setting_sem);
switch (cmd) {
case HDIO_OBSOLETE_IDENTITY:
@@ -1432,6 +1442,28 @@
default:
return -EINVAL;
}
+
+read_val:
+ down(&ide_setting_sem);
+ spin_lock_irqsave(&ide_lock, flags);
+ err = *val;
+ spin_unlock_irqrestore(&ide_lock, flags);
+ up(&ide_setting_sem);
+ return err >= 0 ? put_user(err, (long __user *)arg) : err;
+
+set_val:
+ if (bdev != bdev->bd_contains)
+ err = -EINVAL;
+ else {
+ if (!capable(CAP_SYS_ADMIN))
+ err = -EACCES;
+ else {
+ down(&ide_setting_sem);
+ err = setfunc(drive, arg);
+ up(&ide_setting_sem);
+ }
+ }
+ return err;
}
EXPORT_SYMBOL(generic_ide_ioctl);