userspace-api/ioctl/hdio.rst

2 Summary of `HDIO_` ioctl calls
9 This document attempts to describe the ioctl(2) calls supported by
13 ioctl values are listed in <linux/hdreg.h>.  As of this writing, they
48 	HDIO_SET_KEEPSETTINGS	keep ioctl settings on reset
74 	Unless otherwise specified, all ioctl calls return 0 on success
77 	Unless otherwise specified, all ioctl calls return -1 and set
94 	  ioctl(fd, HDIO_GETGEO, &geom);
132 		ioctl will not return a meaningful value on drives with more
149 	  ioctl(fd, HDIO_GET_UNMASKINTR, &val);
171 	  ioctl(fd, HDIO_SET_UNMASKINTR, val);
200 	  ioctl(fd, HDIO_GET_MULTCOUNT, &val);
222 	  ioctl(fd, HDIO_SET_MULTCOUNT, val);
247 	  If blockmode has already been set, this ioctl will fail with
285 	  ioctl(fd, HDIO_GET_IDENTITY, identity);
304 		this ioctl does not re-probe the drive to update the
319 	  ioctl(fd, HDIO_GET_KEEPSETTINGS, &val);
338 	keep ioctl settings on reset
345 	  ioctl(fd, HDIO_SET_KEEPSETTINGS, val);
373 	  ioctl(fd, HDIO_GET_32BIT, &val);
400 	  ioctl(fd, HDIO_GET_NOWERR, &val);
422 	  ioctl(fd, HDIO_GET_DMA, &val);
444 	  ioctl(fd, HDIO_GET_NICE, &nice);
474 	  ioctl(fd, HDIO_SET_NICE, nice);
492 		This ioctl sets the DSC_OVERLAP and NICE_1 flags from values
510 	  ioctl(fd, HDIO_GET_WCACHE, &val);
532 	  ioctl(fd, HDIO_GET_ACOUSTIC, &val);
557 	  ioctl(fd, HDIO_GET_ADDRESS, &val);
584 	  ioctl(fd, HDIO_SCAN_HWIF, &state);
610 	  ioctl(fd, HDIO_SCAN_HWIF, state);
645 	  ioctl(fd, HDIO_DRIVE_RESET, args);
678 		handy, you should probably ignore this ioctl.
696 	  ioctl(fd, HDIO_DRIVE_TASKFILE, &task);
701 	  (See below for details on memory area passed to ioctl.)
739 	  [1] READ THE FOLLOWING NOTES *CAREFULLY*.  THIS IOCTL IS
741 	  this ioctl.  A mistake can easily corrupt data or hang the
767 	  [5] The argument to the ioctl is a pointer to a region of
904 	handy, you should probably ignore this ioctl.
911 	  ioctl(fd, HDIO_DRIVE_CMD, args);
979 	handy, you should probably ignore this ioctl.
986 	  ioctl(fd, HDIO_DRIVE_TASK, args);
1045 	  ioctl(fd, HDIO_SET_32BIT, val);
1074 	  ioctl(fd, HDIO_SET_NOWERR, val);
1103 	  ioctl(fd, HDIO_SET_DMA, val);
1131 	  ioctl(fd, HDIO_SET_PIO_MODE, val);
1160 	  ioctl(fd, HDIO_SCAN_HWIF, args);
1182 		This ioctl initializes the addresses and irq for a disk
1196 	  ioctl(fd, HDIO_UNREGISTER_HWIF, index);
1212 		This ioctl removes a hardware interface from the kernel.
1214 		Currently (2.6.8) this ioctl silently fails if any drive on
1227 	  ioctl(fd, HDIO_SET_WCACHE, val);
1255 	  ioctl(fd, HDIO_SET_ACOUSTIC, val);
1291 	  ioctl(fd, HDIO_SET_ADDRESS, val);
1321 	  ioctl(fd, HDIO_SET_IDE_SCSI, val);