Commit ce7fe909 authored by Andrew Morton's avatar Andrew Morton Committed by David S. Miller

[PATCH] cciss: add CCISS_GETLUNINFO ioctl

Patch from Stephen Cameron <steve.cameron@hp.com>

Add CCISS_GETLUNINFO ioctl.

This ioctl returns the LUNID, number of partitions, and current number of
opens on a logical volume.  Used by the array config utility or any app that
needs to send passthrough commands to a particular logical disk.
parent 973ab2f4
......@@ -577,6 +577,24 @@ static int cciss_ioctl(struct inode *inode, struct file *filep,
case CCISS_REVALIDVOLS:
return( revalidate_allvol(inode->i_rdev));
case CCISS_GETLUNINFO: {
LogvolInfo_struct luninfo;
struct gendisk *disk = hba[ctlr]->gendisk[dsk];
drive_info_struct *drv = &hba[ctlr]->drv[dsk];
int i;
luninfo.LunID = drv->LunID;
luninfo.num_opens = drv->usage_count;
luninfo.num_parts = 0;
/* count partitions 1 to 15 with sizes > 0 */
for(i=1; i <MAX_PART; i++)
if (disk->part[i].nr_sects != 0)
luninfo.num_parts++;
if (copy_to_user((void *) arg, &luninfo,
sizeof(LogvolInfo_struct)))
return -EFAULT;
return(0);
}
case CCISS_DEREGDISK:
return( deregister_disk(ctlr,dsk));
......
......@@ -169,6 +169,11 @@ typedef struct _IOCTL_Command_struct {
BYTE *buf;
} IOCTL_Command_struct;
typedef struct _LogvolInfo_struct{
__u32 LunID;
int num_opens; /* number of opens on the logical volume */
int num_parts; /* number of partitions configured on logvol */
} LogvolInfo_struct;
#define CCISS_GETPCIINFO _IOR(CCISS_IOC_MAGIC, 1, cciss_pci_info_struct)
......@@ -190,5 +195,6 @@ typedef struct _IOCTL_Command_struct {
#define CCISS_REGNEWDISK _IOW(CCISS_IOC_MAGIC, 13, int)
#define CCISS_REGNEWD _IO(CCISS_IOC_MAGIC, 14)
#define CCISS_GETLUNINFO _IOR(CCISS_IOC_MAGIC, 17, LogvolInfo_struct)
#endif
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