include/uapi/linux/chio.h

Source file repositories/reference/linux-study-clean/include/uapi/linux/chio.h

File Facts

System
Linux kernel
Corpus path
include/uapi/linux/chio.h
Extension
.h
Size
5304 bytes
Lines
167
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct changer_params {
	int cp_curpicker;  /* current transport element */
	int cp_npickers;   /* number of transport elements      (CHET_MT) */
	int cp_nslots;     /* number of storage elements        (CHET_ST) */
	int cp_nportals;   /* number of import/export elements  (CHET_IE) */
	int cp_ndrives;    /* number of data transfer elements  (CHET_DT) */
};
struct changer_vendor_params {
	int  cvp_n1;       /* number of vendor specific elems   (CHET_V1) */
	char cvp_label1[16];
	int  cvp_n2;       /* number of vendor specific elems   (CHET_V2) */
	char cvp_label2[16];
	int  cvp_n3;       /* number of vendor specific elems   (CHET_V3) */
	char cvp_label3[16];
	int  cvp_n4;       /* number of vendor specific elems   (CHET_V4) */
	char cvp_label4[16];
	int  reserved[8];
};


/*
 * CHIOMOVE
 *    move a medium from one element to another
 */
struct changer_move {
	int cm_fromtype;	/* type/unit of source element */
	int cm_fromunit;	
	int cm_totype;	/* type/unit of destination element */
	int cm_tounit;
	int cm_flags;
};
#define CM_INVERT   1   /* flag: rotate media (for double-sided like MOD) */


/*
 * CHIOEXCHANGE
 *    move one medium from element #1 to element #2,
 *    and another one from element #2 to element #3.
 *    element #1 and #3 are allowed to be identical.
 */
struct changer_exchange {
	int ce_srctype;	    /* type/unit of element #1 */
	int ce_srcunit;
	int ce_fdsttype;    /* type/unit of element #2 */
	int ce_fdstunit;
	int ce_sdsttype;    /* type/unit of element #3 */
	int ce_sdstunit;
	int ce_flags;
};
#define CE_INVERT1   1
#define CE_INVERT2   2


/*
 * CHIOPOSITION
 *    move the transport element (robot arm) to a specific element.
 */
struct changer_position {
	int cp_type;
	int cp_unit;
	int cp_flags;
};
#define CP_INVERT   1


/*
 * CHIOGSTATUS
 *    get element status for all elements of a specific type
 */
struct changer_element_status {
	int             ces_type;
	unsigned char   __user *ces_data;
};
#define CESTATUS_FULL     0x01 /* full */
#define CESTATUS_IMPEXP   0x02	/* media was imported (inserted by sysop) */
#define CESTATUS_EXCEPT   0x04	/* error condition */
#define CESTATUS_ACCESS   0x08	/* access allowed */
#define CESTATUS_EXENAB   0x10	/* element can export media */
#define CESTATUS_INENAB   0x20	/* element can import media */


/*
 * CHIOGELEM
 *    get more detailed status information for a single element
 */
struct changer_get_element {
	int	cge_type;	 /* type/unit */
	int	cge_unit;
	int	cge_status;      /* status */
	int     cge_errno;       /* errno */

Annotation

Implementation Notes