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Date: Tue, 05 Aug 2008 18:40:28 +0200
From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To: linux-ide@...r.kernel.org
Cc: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
linux-kernel@...r.kernel.org
Subject: [PATCH 2/4] ide: add ide_setting_ioctl() helper
* Add struct ide_ioctl_devset representing ioctl device setting.
* Add ide_setting_ioctl() helper for matching given ioctl
and its parameters against table of ioctl device settings.
* Convert ide_setting_ioctl() and idedisk_ioctl() to use
ide_setting_ioctl().
* Un-export ide_setting_mtx.
While at it:
* {get,set}_lba_addressing() -> {get,set}_addressing()
There should be no functional changes caused by this patch.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
---
drivers/ide/ide-disk.c | 57 ++++++++++++++-----------------------------------
drivers/ide/ide.c | 53 +++++++++++++++++++++++++++++----------------
include/linux/ide.h | 14 +++++++++++-
3 files changed, 64 insertions(+), 60 deletions(-)
Index: b/drivers/ide/ide-disk.c
===================================================================
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -682,7 +682,7 @@ static int set_acoustic(ide_drive_t *dri
return 0;
}
-ide_devset_get(lba_addressing, addressing);
+ide_devset_get(addressing, addressing);
/*
* drive->addressing:
@@ -690,7 +690,7 @@ ide_devset_get(lba_addressing, addressin
* 1: 48-bit
* 2: 48-bit capable doing 28-bit
*/
-static int set_lba_addressing(ide_drive_t *drive, int arg)
+static int set_addressing(ide_drive_t *drive, int arg)
{
if (arg < 0 || arg > 2)
return -EINVAL;
@@ -710,7 +710,7 @@ static int set_lba_addressing(ide_drive_
#ifdef CONFIG_IDE_PROC_FS
ide_devset_rw_nolock(acoustic, 0, 254, acoustic);
-ide_devset_rw_nolock(address, 0, 2, lba_addressing);
+ide_devset_rw_nolock(address, 0, 2, addressing);
ide_devset_rw_nolock(multcount, 0, 16, multcount);
ide_devset_rw_nolock(nowerr, 0, 1, nowerr);
ide_devset_rw_nolock(wcache, 0, 1, wcache);
@@ -759,7 +759,7 @@ static void idedisk_setup(ide_drive_t *d
drive->doorlocking = 1;
}
- (void)set_lba_addressing(drive, 1);
+ (void)set_addressing(drive, 1);
if (drive->addressing == 1) {
int max_s = 2048;
@@ -1006,51 +1006,28 @@ static int idedisk_getgeo(struct block_d
return 0;
}
+static const struct ide_ioctl_devset ide_disk_ioctl_settings[] = {
+{ HDIO_GET_ADDRESS, HDIO_SET_ADDRESS, get_addressing, set_addressing },
+{ HDIO_GET_MULTCOUNT, HDIO_SET_MULTCOUNT, get_multcount, set_multcount },
+{ HDIO_GET_NOWERR, HDIO_SET_NOWERR, get_nowerr, set_nowerr },
+{ HDIO_GET_WCACHE, HDIO_SET_WCACHE, get_wcache, set_wcache },
+{ HDIO_GET_ACOUSTIC, HDIO_SET_ACOUSTIC, get_acoustic, set_acoustic },
+{ 0 }
+};
+
static int idedisk_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- unsigned long flags;
struct block_device *bdev = inode->i_bdev;
struct ide_disk_obj *idkp = ide_disk_g(bdev->bd_disk);
ide_drive_t *drive = idkp->drive;
- int err, (*getfunc)(ide_drive_t *), (*setfunc)(ide_drive_t *, int);
+ int err;
- switch (cmd) {
- case HDIO_GET_ADDRESS: getfunc = get_lba_addressing; goto read_val;
- case HDIO_GET_MULTCOUNT: getfunc = get_multcount; goto read_val;
- case HDIO_GET_NOWERR: getfunc = get_nowerr; goto read_val;
- case HDIO_GET_WCACHE: getfunc = get_wcache; goto read_val;
- case HDIO_GET_ACOUSTIC: getfunc = get_acoustic; goto read_val;
- case HDIO_SET_ADDRESS: setfunc = set_lba_addressing; goto set_val;
- case HDIO_SET_MULTCOUNT: setfunc = set_multcount; goto set_val;
- case HDIO_SET_NOWERR: setfunc = set_nowerr; goto set_val;
- case HDIO_SET_WCACHE: setfunc = set_wcache; goto set_val;
- case HDIO_SET_ACOUSTIC: setfunc = set_acoustic; goto set_val;
- }
+ err = ide_setting_ioctl(drive, bdev, cmd, arg, ide_disk_ioctl_settings);
+ if (err != -EOPNOTSUPP)
+ return err;
return generic_ide_ioctl(drive, file, bdev, cmd, arg);
-
-read_val:
- mutex_lock(&ide_setting_mtx);
- spin_lock_irqsave(&ide_lock, flags);
- err = getfunc(drive);
- spin_unlock_irqrestore(&ide_lock, flags);
- mutex_unlock(&ide_setting_mtx);
- 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 {
- mutex_lock(&ide_setting_mtx);
- err = setfunc(drive, arg);
- mutex_unlock(&ide_setting_mtx);
- }
- }
- return err;
}
static int idedisk_media_changed(struct gendisk *disk)
Index: b/drivers/ide/ide.c
===================================================================
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -250,8 +250,6 @@ void ide_init_port_hw(ide_hwif_t *hwif,
DEFINE_MUTEX(ide_setting_mtx);
-EXPORT_SYMBOL_GPL(ide_setting_mtx);
-
/**
* ide_spin_wait_hwgroup - wait for group
* @drive: drive in the group
@@ -558,23 +556,23 @@ static int ide_set_nice_ioctl(ide_drive_
return 0;
}
+static const struct ide_ioctl_devset ide_ioctl_settings[] = {
+{ HDIO_GET_32BIT, HDIO_SET_32BIT, get_io_32bit, set_io_32bit },
+{ HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, get_ksettings, set_ksettings },
+{ HDIO_GET_UNMASKINTR, HDIO_SET_UNMASKINTR, get_unmaskirq, set_unmaskirq },
+{ HDIO_GET_DMA, HDIO_SET_DMA, get_using_dma, set_using_dma },
+{ -1, HDIO_SET_PIO_MODE, NULL, set_pio_mode },
+{ 0 }
+};
+
int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
unsigned int cmd, unsigned long arg)
{
- unsigned long flags;
- int err = 0, (*getfunc)(ide_drive_t *), (*setfunc)(ide_drive_t *, int);
+ int err;
- switch (cmd) {
- case HDIO_GET_32BIT: getfunc = get_io_32bit; goto read_val;
- case HDIO_GET_KEEPSETTINGS: getfunc = get_ksettings; goto read_val;
- case HDIO_GET_UNMASKINTR: getfunc = get_unmaskirq; goto read_val;
- case HDIO_GET_DMA: getfunc = get_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;
- }
+ err = ide_setting_ioctl(drive, bdev, cmd, arg, ide_ioctl_settings);
+ if (err != -EOPNOTSUPP)
+ return err;
switch (cmd) {
case HDIO_OBSOLETE_IDENTITY:
@@ -629,11 +627,29 @@ int generic_ide_ioctl(ide_drive_t *drive
default:
return -EINVAL;
}
+}
+EXPORT_SYMBOL(generic_ide_ioctl);
+
+int ide_setting_ioctl(ide_drive_t *drive, struct block_device *bdev,
+ unsigned int cmd, unsigned long arg,
+ const struct ide_ioctl_devset *s)
+{
+ unsigned long flags;
+ int err = -EOPNOTSUPP;
+
+ for (; s->get_ioctl; s++) {
+ if (s->get && s->get_ioctl == cmd)
+ goto read_val;
+ else if (s->set && s->set_ioctl == cmd)
+ goto set_val;
+ }
+
+ return err;
read_val:
mutex_lock(&ide_setting_mtx);
spin_lock_irqsave(&ide_lock, flags);
- err = getfunc(drive);
+ err = s->get(drive);
spin_unlock_irqrestore(&ide_lock, flags);
mutex_unlock(&ide_setting_mtx);
return err >= 0 ? put_user(err, (long __user *)arg) : err;
@@ -646,14 +662,13 @@ set_val:
err = -EACCES;
else {
mutex_lock(&ide_setting_mtx);
- err = setfunc(drive, arg);
+ err = s->set(drive, arg);
mutex_unlock(&ide_setting_mtx);
}
}
return err;
}
-
-EXPORT_SYMBOL(generic_ide_ioctl);
+EXPORT_SYMBOL_GPL(ide_setting_ioctl);
/**
* ide_device_get - get an additional reference to a ide_drive_t
Index: b/include/linux/ide.h
===================================================================
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -930,7 +930,19 @@ struct ide_driver_s {
int ide_device_get(ide_drive_t *);
void ide_device_put(ide_drive_t *);
-int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *, unsigned, unsigned long);
+struct ide_ioctl_devset {
+ unsigned int get_ioctl;
+ unsigned int set_ioctl;
+
+ int (*get)(ide_drive_t *);
+ int (*set)(ide_drive_t *, int);
+};
+
+int ide_setting_ioctl(ide_drive_t *, struct block_device *, unsigned int,
+ unsigned long, const struct ide_ioctl_devset *);
+
+int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *,
+ unsigned, unsigned long);
extern int ide_vlb_clk;
extern int ide_pci_clk;
--
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