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compat_ioctl: move floppy handlers to block/compat_ioctl.c
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The floppy ioctls are used by multiple drivers, so they should be
handled in a shared location. Also, add minor cleanups.

Signed-off-by: Arnd Bergmann <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
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@arndb
arndb authored and Jens Axboe committed Oct 10, 2007
1 parent b3087cc commit 1ca91cd
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Showing 2 changed files with 336 additions and 337 deletions.
336 changes: 336 additions & 0 deletions block/compat_ioctl.c
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Original file line number Diff line number Diff line change
Expand Up @@ -203,6 +203,332 @@ static int compat_blkpg_ioctl(struct inode *inode, struct file *file,
#define BLKBSZSET_32 _IOW(0x12, 113, int)
#define BLKGETSIZE64_32 _IOR(0x12, 114, int)

struct compat_floppy_struct {
compat_uint_t size;
compat_uint_t sect;
compat_uint_t head;
compat_uint_t track;
compat_uint_t stretch;
unsigned char gap;
unsigned char rate;
unsigned char spec1;
unsigned char fmt_gap;
const compat_caddr_t name;
};

struct compat_floppy_drive_params {
char cmos;
compat_ulong_t max_dtr;
compat_ulong_t hlt;
compat_ulong_t hut;
compat_ulong_t srt;
compat_ulong_t spinup;
compat_ulong_t spindown;
unsigned char spindown_offset;
unsigned char select_delay;
unsigned char rps;
unsigned char tracks;
compat_ulong_t timeout;
unsigned char interleave_sect;
struct floppy_max_errors max_errors;
char flags;
char read_track;
short autodetect[8];
compat_int_t checkfreq;
compat_int_t native_format;
};

struct compat_floppy_drive_struct {
signed char flags;
compat_ulong_t spinup_date;
compat_ulong_t select_date;
compat_ulong_t first_read_date;
short probed_format;
short track;
short maxblock;
short maxtrack;
compat_int_t generation;
compat_int_t keep_data;
compat_int_t fd_ref;
compat_int_t fd_device;
compat_int_t last_checked;
compat_caddr_t dmabuf;
compat_int_t bufblocks;
};

struct compat_floppy_fdc_state {
compat_int_t spec1;
compat_int_t spec2;
compat_int_t dtr;
unsigned char version;
unsigned char dor;
compat_ulong_t address;
unsigned int rawcmd:2;
unsigned int reset:1;
unsigned int need_configure:1;
unsigned int perp_mode:2;
unsigned int has_fifo:1;
unsigned int driver_version;
unsigned char track[4];
};

struct compat_floppy_write_errors {
unsigned int write_errors;
compat_ulong_t first_error_sector;
compat_int_t first_error_generation;
compat_ulong_t last_error_sector;
compat_int_t last_error_generation;
compat_uint_t badness;
};

#define FDSETPRM32 _IOW(2, 0x42, struct compat_floppy_struct)
#define FDDEFPRM32 _IOW(2, 0x43, struct compat_floppy_struct)
#define FDGETPRM32 _IOR(2, 0x04, struct compat_floppy_struct)
#define FDSETDRVPRM32 _IOW(2, 0x90, struct compat_floppy_drive_params)
#define FDGETDRVPRM32 _IOR(2, 0x11, struct compat_floppy_drive_params)
#define FDGETDRVSTAT32 _IOR(2, 0x12, struct compat_floppy_drive_struct)
#define FDPOLLDRVSTAT32 _IOR(2, 0x13, struct compat_floppy_drive_struct)
#define FDGETFDCSTAT32 _IOR(2, 0x15, struct compat_floppy_fdc_state)
#define FDWERRORGET32 _IOR(2, 0x17, struct compat_floppy_write_errors)

static struct {
unsigned int cmd32;
unsigned int cmd;
} fd_ioctl_trans_table[] = {
{ FDSETPRM32, FDSETPRM },
{ FDDEFPRM32, FDDEFPRM },
{ FDGETPRM32, FDGETPRM },
{ FDSETDRVPRM32, FDSETDRVPRM },
{ FDGETDRVPRM32, FDGETDRVPRM },
{ FDGETDRVSTAT32, FDGETDRVSTAT },
{ FDPOLLDRVSTAT32, FDPOLLDRVSTAT },
{ FDGETFDCSTAT32, FDGETFDCSTAT },
{ FDWERRORGET32, FDWERRORGET }
};

#define NR_FD_IOCTL_TRANS ARRAY_SIZE(fd_ioctl_trans_table)

static int compat_fd_ioctl(struct inode *inode, struct file *file,
struct gendisk *disk, unsigned int cmd, unsigned long arg)
{
mm_segment_t old_fs = get_fs();
void *karg = NULL;
unsigned int kcmd = 0;
int i, err;

for (i = 0; i < NR_FD_IOCTL_TRANS; i++)
if (cmd == fd_ioctl_trans_table[i].cmd32) {
kcmd = fd_ioctl_trans_table[i].cmd;
break;
}
if (!kcmd)
return -EINVAL;

switch (cmd) {
case FDSETPRM32:
case FDDEFPRM32:
case FDGETPRM32:
{
compat_uptr_t name;
struct compat_floppy_struct __user *uf;
struct floppy_struct *f;

uf = compat_ptr(arg);
f = karg = kmalloc(sizeof(struct floppy_struct), GFP_KERNEL);
if (!karg)
return -ENOMEM;
if (cmd == FDGETPRM32)
break;
err = __get_user(f->size, &uf->size);
err |= __get_user(f->sect, &uf->sect);
err |= __get_user(f->head, &uf->head);
err |= __get_user(f->track, &uf->track);
err |= __get_user(f->stretch, &uf->stretch);
err |= __get_user(f->gap, &uf->gap);
err |= __get_user(f->rate, &uf->rate);
err |= __get_user(f->spec1, &uf->spec1);
err |= __get_user(f->fmt_gap, &uf->fmt_gap);
err |= __get_user(name, &uf->name);
f->name = compat_ptr(name);
if (err) {
err = -EFAULT;
goto out;
}
break;
}
case FDSETDRVPRM32:
case FDGETDRVPRM32:
{
struct compat_floppy_drive_params __user *uf;
struct floppy_drive_params *f;

uf = compat_ptr(arg);
f = karg = kmalloc(sizeof(struct floppy_drive_params), GFP_KERNEL);
if (!karg)
return -ENOMEM;
if (cmd == FDGETDRVPRM32)
break;
err = __get_user(f->cmos, &uf->cmos);
err |= __get_user(f->max_dtr, &uf->max_dtr);
err |= __get_user(f->hlt, &uf->hlt);
err |= __get_user(f->hut, &uf->hut);
err |= __get_user(f->srt, &uf->srt);
err |= __get_user(f->spinup, &uf->spinup);
err |= __get_user(f->spindown, &uf->spindown);
err |= __get_user(f->spindown_offset, &uf->spindown_offset);
err |= __get_user(f->select_delay, &uf->select_delay);
err |= __get_user(f->rps, &uf->rps);
err |= __get_user(f->tracks, &uf->tracks);
err |= __get_user(f->timeout, &uf->timeout);
err |= __get_user(f->interleave_sect, &uf->interleave_sect);
err |= __copy_from_user(&f->max_errors, &uf->max_errors, sizeof(f->max_errors));
err |= __get_user(f->flags, &uf->flags);
err |= __get_user(f->read_track, &uf->read_track);
err |= __copy_from_user(f->autodetect, uf->autodetect, sizeof(f->autodetect));
err |= __get_user(f->checkfreq, &uf->checkfreq);
err |= __get_user(f->native_format, &uf->native_format);
if (err) {
err = -EFAULT;
goto out;
}
break;
}
case FDGETDRVSTAT32:
case FDPOLLDRVSTAT32:
karg = kmalloc(sizeof(struct floppy_drive_struct), GFP_KERNEL);
if (!karg)
return -ENOMEM;
break;
case FDGETFDCSTAT32:
karg = kmalloc(sizeof(struct floppy_fdc_state), GFP_KERNEL);
if (!karg)
return -ENOMEM;
break;
case FDWERRORGET32:
karg = kmalloc(sizeof(struct floppy_write_errors), GFP_KERNEL);
if (!karg)
return -ENOMEM;
break;
default:
return -EINVAL;
}
set_fs(KERNEL_DS);
err = blkdev_driver_ioctl(inode, file, disk, kcmd, (unsigned long)karg);
set_fs(old_fs);
if (err)
goto out;
switch (cmd) {
case FDGETPRM32:
{
struct floppy_struct *f = karg;
struct compat_floppy_struct __user *uf = compat_ptr(arg);

err = __put_user(f->size, &uf->size);
err |= __put_user(f->sect, &uf->sect);
err |= __put_user(f->head, &uf->head);
err |= __put_user(f->track, &uf->track);
err |= __put_user(f->stretch, &uf->stretch);
err |= __put_user(f->gap, &uf->gap);
err |= __put_user(f->rate, &uf->rate);
err |= __put_user(f->spec1, &uf->spec1);
err |= __put_user(f->fmt_gap, &uf->fmt_gap);
err |= __put_user((u64)f->name, (compat_caddr_t __user *)&uf->name);
break;
}
case FDGETDRVPRM32:
{
struct compat_floppy_drive_params __user *uf;
struct floppy_drive_params *f = karg;

uf = compat_ptr(arg);
err = __put_user(f->cmos, &uf->cmos);
err |= __put_user(f->max_dtr, &uf->max_dtr);
err |= __put_user(f->hlt, &uf->hlt);
err |= __put_user(f->hut, &uf->hut);
err |= __put_user(f->srt, &uf->srt);
err |= __put_user(f->spinup, &uf->spinup);
err |= __put_user(f->spindown, &uf->spindown);
err |= __put_user(f->spindown_offset, &uf->spindown_offset);
err |= __put_user(f->select_delay, &uf->select_delay);
err |= __put_user(f->rps, &uf->rps);
err |= __put_user(f->tracks, &uf->tracks);
err |= __put_user(f->timeout, &uf->timeout);
err |= __put_user(f->interleave_sect, &uf->interleave_sect);
err |= __copy_to_user(&uf->max_errors, &f->max_errors, sizeof(f->max_errors));
err |= __put_user(f->flags, &uf->flags);
err |= __put_user(f->read_track, &uf->read_track);
err |= __copy_to_user(uf->autodetect, f->autodetect, sizeof(f->autodetect));
err |= __put_user(f->checkfreq, &uf->checkfreq);
err |= __put_user(f->native_format, &uf->native_format);
break;
}
case FDGETDRVSTAT32:
case FDPOLLDRVSTAT32:
{
struct compat_floppy_drive_struct __user *uf;
struct floppy_drive_struct *f = karg;

uf = compat_ptr(arg);
err = __put_user(f->flags, &uf->flags);
err |= __put_user(f->spinup_date, &uf->spinup_date);
err |= __put_user(f->select_date, &uf->select_date);
err |= __put_user(f->first_read_date, &uf->first_read_date);
err |= __put_user(f->probed_format, &uf->probed_format);
err |= __put_user(f->track, &uf->track);
err |= __put_user(f->maxblock, &uf->maxblock);
err |= __put_user(f->maxtrack, &uf->maxtrack);
err |= __put_user(f->generation, &uf->generation);
err |= __put_user(f->keep_data, &uf->keep_data);
err |= __put_user(f->fd_ref, &uf->fd_ref);
err |= __put_user(f->fd_device, &uf->fd_device);
err |= __put_user(f->last_checked, &uf->last_checked);
err |= __put_user((u64)f->dmabuf, &uf->dmabuf);
err |= __put_user((u64)f->bufblocks, &uf->bufblocks);
break;
}
case FDGETFDCSTAT32:
{
struct compat_floppy_fdc_state __user *uf;
struct floppy_fdc_state *f = karg;

uf = compat_ptr(arg);
err = __put_user(f->spec1, &uf->spec1);
err |= __put_user(f->spec2, &uf->spec2);
err |= __put_user(f->dtr, &uf->dtr);
err |= __put_user(f->version, &uf->version);
err |= __put_user(f->dor, &uf->dor);
err |= __put_user(f->address, &uf->address);
err |= __copy_to_user((char __user *)&uf->address + sizeof(uf->address),
(char *)&f->address + sizeof(f->address), sizeof(int));
err |= __put_user(f->driver_version, &uf->driver_version);
err |= __copy_to_user(uf->track, f->track, sizeof(f->track));
break;
}
case FDWERRORGET32:
{
struct compat_floppy_write_errors __user *uf;
struct floppy_write_errors *f = karg;

uf = compat_ptr(arg);
err = __put_user(f->write_errors, &uf->write_errors);
err |= __put_user(f->first_error_sector, &uf->first_error_sector);
err |= __put_user(f->first_error_generation, &uf->first_error_generation);
err |= __put_user(f->last_error_sector, &uf->last_error_sector);
err |= __put_user(f->last_error_generation, &uf->last_error_generation);
err |= __put_user(f->badness, &uf->badness);
break;
}
default:
break;
}
if (err)
err = -EFAULT;

out:
kfree(karg);
return err;
}

struct compat_blk_user_trace_setup {
char name[32];
u16 act_mask;
Expand Down Expand Up @@ -268,6 +594,16 @@ static int compat_blkdev_driver_ioctl(struct inode *inode, struct file *file,
case HDIO_GET_ADDRESS:
case HDIO_GET_BUSSTATE:
return compat_hdio_ioctl(inode, file, disk, cmd, arg);
case FDSETPRM32:
case FDDEFPRM32:
case FDGETPRM32:
case FDSETDRVPRM32:
case FDGETDRVPRM32:
case FDGETDRVSTAT32:
case FDPOLLDRVSTAT32:
case FDGETFDCSTAT32:
case FDWERRORGET32:
return compat_fd_ioctl(inode, file, disk, cmd, arg);
case CDROMREADAUDIO:
return compat_cdrom_read_audio(inode, file, disk, cmd, arg);
case CDROM_SEND_PACKET:
Expand Down
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