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- Add new API ntfs_device_heads_get() and 

ntfs_device_sectors_per_track_get().

(Logical change 1.345)
edge.strict_endians
cantab.net!aia21 2004-03-24 10:36:31 +00:00
parent b8c685fcc5
commit 559786d6c9
1 changed files with 80 additions and 0 deletions
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80
libntfs/device.c
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@ -458,10 +458,17 @@ static inline int ntfs_device_offset_valid(struct ntfs_device *dev, s64 ofs)
* open device @dev.
*
* Adapted from e2fsutils-1.19, Copyright (C) 1995 Theodore Ts'o.
*
* On error return -1 with errno set to the error code.
*/
s64 ntfs_device_size_get(struct ntfs_device *dev, int block_size)
{
s64 high, low;
if (!dev || block_size <= 0 || (block_size - 1) & block_size) {
errno = EINVAL;
return -1;
}
#ifdef BLKGETSIZE64
{ u64 size;
@ -520,11 +527,16 @@ s64 ntfs_device_size_get(struct ntfs_device *dev, int block_size)
* block device of @dev. On error return -1 with errno set to the error code.
*
* The following error codes are defined:
* EINVAL Input parameter error
* ENOTSUP System does not support HDIO_GETGEO ioctl
* ENOTTY @dev is a file or a device not supporting HDIO_GETGEO
*/
s64 ntfs_device_partition_start_sector_get(struct ntfs_device *dev)
{
if (!dev) {
errno = EINVAL;
return -1;
}
#ifdef HDIO_GETGEO
{ struct hd_geometry geo;
@ -539,3 +551,71 @@ s64 ntfs_device_partition_start_sector_get(struct ntfs_device *dev)
#endif
return -1;
}
/**
* ntfs_device_heads_get - get number of heads of device
* @dev: open device
*
* On success, return the number of heads on the device @dev. On error return
* -1 with errno set to the error code.
*
* The following error codes are defined:
* EINVAL Input parameter error
* ENOTSUP System does not support HDIO_GETGEO ioctl
* ENOTTY @dev is a file or a device not supporting HDIO_GETGEO
*/
int ntfs_device_heads_get(struct ntfs_device *dev)
{
if (!dev) {
errno = EINVAL;
return -1;
}
#ifdef HDIO_GETGEO
{ struct hd_geometry geo;
if (!dev->d_ops->ioctl(dev, HDIO_GETGEO, &geo)) {
Dprintf("HDIO_GETGEO heads = %u (0x%x)\n",
(unsigned)geo.heads,
(unsigned)geo.heads);
return geo.heads;
}
}
#else
errno = ENOTSUP;
#endif
return -1;
}
/**
* ntfs_device_sectors_per_track_get - get number of sectors per track of device
* @dev: open device
*
* On success, return the number of sectors per track on the device @dev. On
* error return -1 with errno set to the error code.
*
* The following error codes are defined:
* EINVAL Input parameter error
* ENOTSUP System does not support HDIO_GETGEO ioctl
* ENOTTY @dev is a file or a device not supporting HDIO_GETGEO
*/
int ntfs_device_sectors_per_track_get(struct ntfs_device *dev)
{
if (!dev) {
errno = EINVAL;
return -1;
}
#ifdef HDIO_GETGEO
{ struct hd_geometry geo;
if (!dev->d_ops->ioctl(dev, HDIO_GETGEO, &geo)) {
Dprintf("HDIO_GETGEO sectors_per_track = %u (0x%x)\n",
(unsigned)geo.sectors,
(unsigned)geo.sectors);
return geo.sectors;
}
}
#else
errno = ENOTSUP;
#endif
return -1;
}