include/uapi/linux/cdrom.h
Source file repositories/reference/linux-study-clean/include/uapi/linux/cdrom.h
File Facts
- System
- Linux kernel
- Corpus path
include/uapi/linux/cdrom.h- Extension
.h- Size
- 29611 bytes
- Lines
- 970
- 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.
- Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/types.hasm/byteorder.h
Detected Declarations
struct cdrom_msf0struct cdrom_msfstruct cdrom_tistruct cdrom_tochdrstruct cdrom_volctrlstruct cdrom_subchnlstruct cdrom_tocentrystruct cdrom_readstruct cdrom_read_audiostruct cdrom_multisessionstruct cdrom_mcnstruct cdrom_blkstruct cdrom_generic_commandstruct cdrom_timed_media_change_infostruct dvd_layerstruct dvd_physicalstruct dvd_copyrightstruct dvd_disckeystruct dvd_bcastruct dvd_manufactstruct dvd_lu_send_agidstruct dvd_host_send_challengestruct dvd_send_keystruct dvd_lu_send_challengestruct dvd_lu_send_title_keystruct dvd_lu_send_asfstruct dvd_host_send_rpcstatestruct dvd_lu_send_rpcstatestruct request_sensestruct mrw_feature_descstruct rwrt_feature_descstruct feature_headerstruct mode_page_headerstruct rm_feature_desc
Annotated Snippet
struct cdrom_timed_media_change_info {
__s64 last_media_change; /* Timestamp of the last detected media
* change in ms. May be set by caller,
* updated upon successful return of
* ioctl.
*/
__u64 media_flags; /* Flags returned by ioctl to indicate
* media status.
*/
};
#define MEDIA_CHANGED_FLAG 0x1 /* Last detected media change was more
* recent than last_media_change set by
* caller.
*/
/* other bits of media_flags available for future use */
/*
* A CD-ROM physical sector size is 2048, 2052, 2056, 2324, 2332, 2336,
* 2340, or 2352 bytes long.
* Sector types of the standard CD-ROM data formats:
*
* format sector type user data size (bytes)
* -----------------------------------------------------------------------------
* 1 (Red Book) CD-DA 2352 (CD_FRAMESIZE_RAW)
* 2 (Yellow Book) Mode1 Form1 2048 (CD_FRAMESIZE)
* 3 (Yellow Book) Mode1 Form2 2336 (CD_FRAMESIZE_RAW0)
* 4 (Green Book) Mode2 Form1 2048 (CD_FRAMESIZE)
* 5 (Green Book) Mode2 Form2 2328 (2324+4 spare bytes)
*
*
* The layout of the standard CD-ROM data formats:
* -----------------------------------------------------------------------------
* - audio (red): | audio_sample_bytes |
* | 2352 |
*
* - data (yellow, mode1): | sync - head - data - EDC - zero - ECC |
* | 12 - 4 - 2048 - 4 - 8 - 276 |
*
* - data (yellow, mode2): | sync - head - data |
* | 12 - 4 - 2336 |
*
* - XA data (green, mode2 form1): | sync - head - sub - data - EDC - ECC |
* | 12 - 4 - 8 - 2048 - 4 - 276 |
*
* - XA data (green, mode2 form2): | sync - head - sub - data - Spare |
* | 12 - 4 - 8 - 2324 - 4 |
*
*/
/* Some generally useful CD-ROM information -- mostly based on the above */
#define CD_MINS 74 /* max. minutes per CD, not really a limit */
#define CD_SECS 60 /* seconds per minute */
#define CD_FRAMES 75 /* frames per second */
#define CD_SYNC_SIZE 12 /* 12 sync bytes per raw data frame */
#define CD_MSF_OFFSET 150 /* MSF numbering offset of first frame */
#define CD_CHUNK_SIZE 24 /* lowest-level "data bytes piece" */
#define CD_NUM_OF_CHUNKS 98 /* chunks per frame */
#define CD_FRAMESIZE_SUB 96 /* subchannel data "frame" size */
#define CD_HEAD_SIZE 4 /* header (address) bytes per raw data frame */
#define CD_SUBHEAD_SIZE 8 /* subheader bytes per raw XA data frame */
#define CD_EDC_SIZE 4 /* bytes EDC per most raw data frame types */
#define CD_ZERO_SIZE 8 /* bytes zero per yellow book mode 1 frame */
#define CD_ECC_SIZE 276 /* bytes ECC per most raw data frame types */
#define CD_FRAMESIZE 2048 /* bytes per frame, "cooked" mode */
#define CD_FRAMESIZE_RAW 2352 /* bytes per frame, "raw" mode */
#define CD_FRAMESIZE_RAWER 2646 /* The maximum possible returned bytes */
/* most drives don't deliver everything: */
#define CD_FRAMESIZE_RAW1 (CD_FRAMESIZE_RAW-CD_SYNC_SIZE) /*2340*/
#define CD_FRAMESIZE_RAW0 (CD_FRAMESIZE_RAW-CD_SYNC_SIZE-CD_HEAD_SIZE) /*2336*/
#define CD_XA_HEAD (CD_HEAD_SIZE+CD_SUBHEAD_SIZE) /* "before data" part of raw XA frame */
#define CD_XA_TAIL (CD_EDC_SIZE+CD_ECC_SIZE) /* "after data" part of raw XA frame */
#define CD_XA_SYNC_HEAD (CD_SYNC_SIZE+CD_XA_HEAD) /* sync bytes + header of XA frame */
/* CD-ROM address types (cdrom_tocentry.cdte_format) */
#define CDROM_LBA 0x01 /* "logical block": first frame is #0 */
#define CDROM_MSF 0x02 /* "minute-second-frame": binary, not bcd here! */
/* bit to tell whether track is data or audio (cdrom_tocentry.cdte_ctrl) */
#define CDROM_DATA_TRACK 0x04
/* The leadout track is always 0xAA, regardless of # of tracks on disc */
#define CDROM_LEADOUT 0xAA
/* audio states (from SCSI-2, but seen with other drives, too) */
#define CDROM_AUDIO_INVALID 0x00 /* audio status not supported */
#define CDROM_AUDIO_PLAY 0x11 /* audio play operation in progress */
#define CDROM_AUDIO_PAUSED 0x12 /* audio play operation paused */
#define CDROM_AUDIO_COMPLETED 0x13 /* audio play successfully completed */
Annotation
- Immediate include surface: `linux/types.h`, `asm/byteorder.h`.
- Detected declarations: `struct cdrom_msf0`, `struct cdrom_msf`, `struct cdrom_ti`, `struct cdrom_tochdr`, `struct cdrom_volctrl`, `struct cdrom_subchnl`, `struct cdrom_tocentry`, `struct cdrom_read`, `struct cdrom_read_audio`, `struct cdrom_multisession`.
- Atlas domain: Core OS / Core Kernel Interface.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.