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bcce3de1be
Implement extended device numbers. A block driver can tell block layer that it wants to use extended device numbers. After the usual minor space is used up, block layer automatically allocates devt's from EXT_BLOCK_MAJOR. Currently only one major number is allocated for this but as the allocation is strictly on-demand, ~1mil minor space under it should suffice unless the system actually has more than ~1mil partitions and if that ever happens adding more majors to the extended devt area is easy. Due to internal implementation issues, the first partition can't be allocated on the extended area. In other words, genhd->minors should at least be 1. This limitation will be lifted by later changes. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
176 lines
4.4 KiB
C
176 lines
4.4 KiB
C
#ifndef _LINUX_MAJOR_H
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#define _LINUX_MAJOR_H
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/*
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* This file has definitions for major device numbers.
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* For the device number assignments, see Documentation/devices.txt.
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*/
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#define UNNAMED_MAJOR 0
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#define MEM_MAJOR 1
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#define RAMDISK_MAJOR 1
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#define FLOPPY_MAJOR 2
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#define PTY_MASTER_MAJOR 2
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#define IDE0_MAJOR 3
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#define HD_MAJOR IDE0_MAJOR
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#define PTY_SLAVE_MAJOR 3
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#define TTY_MAJOR 4
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#define TTYAUX_MAJOR 5
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#define LP_MAJOR 6
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#define VCS_MAJOR 7
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#define LOOP_MAJOR 7
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#define SCSI_DISK0_MAJOR 8
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#define SCSI_TAPE_MAJOR 9
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#define MD_MAJOR 9
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#define MISC_MAJOR 10
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#define SCSI_CDROM_MAJOR 11
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#define MUX_MAJOR 11 /* PA-RISC only */
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#define XT_DISK_MAJOR 13
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#define INPUT_MAJOR 13
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#define SOUND_MAJOR 14
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#define CDU31A_CDROM_MAJOR 15
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#define JOYSTICK_MAJOR 15
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#define GOLDSTAR_CDROM_MAJOR 16
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#define OPTICS_CDROM_MAJOR 17
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#define SANYO_CDROM_MAJOR 18
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#define CYCLADES_MAJOR 19
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#define CYCLADESAUX_MAJOR 20
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#define MITSUMI_X_CDROM_MAJOR 20
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#define MFM_ACORN_MAJOR 21 /* ARM Linux /dev/mfm */
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#define SCSI_GENERIC_MAJOR 21
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#define IDE1_MAJOR 22
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#define DIGICU_MAJOR 22
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#define DIGI_MAJOR 23
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#define MITSUMI_CDROM_MAJOR 23
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#define CDU535_CDROM_MAJOR 24
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#define STL_SERIALMAJOR 24
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#define MATSUSHITA_CDROM_MAJOR 25
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#define STL_CALLOUTMAJOR 25
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#define MATSUSHITA_CDROM2_MAJOR 26
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#define QIC117_TAPE_MAJOR 27
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#define MATSUSHITA_CDROM3_MAJOR 27
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#define MATSUSHITA_CDROM4_MAJOR 28
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#define STL_SIOMEMMAJOR 28
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#define ACSI_MAJOR 28
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#define AZTECH_CDROM_MAJOR 29
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#define FB_MAJOR 29 /* /dev/fb* framebuffers */
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#define CM206_CDROM_MAJOR 32
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#define IDE2_MAJOR 33
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#define IDE3_MAJOR 34
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#define Z8530_MAJOR 34
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#define XPRAM_MAJOR 35 /* Expanded storage on S/390: "slow ram"*/
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#define NETLINK_MAJOR 36
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#define PS2ESDI_MAJOR 36
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#define IDETAPE_MAJOR 37
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#define Z2RAM_MAJOR 37
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#define APBLOCK_MAJOR 38 /* AP1000 Block device */
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#define DDV_MAJOR 39 /* AP1000 DDV block device */
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#define NBD_MAJOR 43 /* Network block device */
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#define RISCOM8_NORMAL_MAJOR 48
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#define DAC960_MAJOR 48 /* 48..55 */
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#define RISCOM8_CALLOUT_MAJOR 49
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#define MKISS_MAJOR 55
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#define DSP56K_MAJOR 55 /* DSP56001 processor device */
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#define IDE4_MAJOR 56
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#define IDE5_MAJOR 57
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#define SCSI_DISK1_MAJOR 65
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#define SCSI_DISK2_MAJOR 66
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#define SCSI_DISK3_MAJOR 67
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#define SCSI_DISK4_MAJOR 68
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#define SCSI_DISK5_MAJOR 69
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#define SCSI_DISK6_MAJOR 70
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#define SCSI_DISK7_MAJOR 71
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#define COMPAQ_SMART2_MAJOR 72
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#define COMPAQ_SMART2_MAJOR1 73
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#define COMPAQ_SMART2_MAJOR2 74
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#define COMPAQ_SMART2_MAJOR3 75
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#define COMPAQ_SMART2_MAJOR4 76
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#define COMPAQ_SMART2_MAJOR5 77
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#define COMPAQ_SMART2_MAJOR6 78
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#define COMPAQ_SMART2_MAJOR7 79
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#define SPECIALIX_NORMAL_MAJOR 75
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#define SPECIALIX_CALLOUT_MAJOR 76
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#define AURORA_MAJOR 79
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#define I2O_MAJOR 80 /* 80->87 */
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#define SHMIQ_MAJOR 85 /* Linux/mips, SGI /dev/shmiq */
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#define SCSI_CHANGER_MAJOR 86
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#define IDE6_MAJOR 88
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#define IDE7_MAJOR 89
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#define IDE8_MAJOR 90
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#define IDE9_MAJOR 91
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#define DASD_MAJOR 94
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#define MDISK_MAJOR 95
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#define UBD_MAJOR 98
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#define PP_MAJOR 99
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#define JSFD_MAJOR 99
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#define PHONE_MAJOR 100
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#define COMPAQ_CISS_MAJOR 104
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#define COMPAQ_CISS_MAJOR1 105
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#define COMPAQ_CISS_MAJOR2 106
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#define COMPAQ_CISS_MAJOR3 107
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#define COMPAQ_CISS_MAJOR4 108
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#define COMPAQ_CISS_MAJOR5 109
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#define COMPAQ_CISS_MAJOR6 110
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#define COMPAQ_CISS_MAJOR7 111
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#define VIODASD_MAJOR 112
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#define VIOCD_MAJOR 113
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#define ATARAID_MAJOR 114
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#define SCSI_DISK8_MAJOR 128
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#define SCSI_DISK9_MAJOR 129
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#define SCSI_DISK10_MAJOR 130
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#define SCSI_DISK11_MAJOR 131
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#define SCSI_DISK12_MAJOR 132
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#define SCSI_DISK13_MAJOR 133
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#define SCSI_DISK14_MAJOR 134
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#define SCSI_DISK15_MAJOR 135
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#define UNIX98_PTY_MASTER_MAJOR 128
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#define UNIX98_PTY_MAJOR_COUNT 8
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#define UNIX98_PTY_SLAVE_MAJOR (UNIX98_PTY_MASTER_MAJOR+UNIX98_PTY_MAJOR_COUNT)
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#define RTF_MAJOR 150
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#define RAW_MAJOR 162
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#define USB_ACM_MAJOR 166
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#define USB_ACM_AUX_MAJOR 167
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#define USB_CHAR_MAJOR 180
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#define MMC_BLOCK_MAJOR 179
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#define VXVM_MAJOR 199 /* VERITAS volume i/o driver */
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#define VXSPEC_MAJOR 200 /* VERITAS volume config driver */
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#define VXDMP_MAJOR 201 /* VERITAS volume multipath driver */
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#define XENVBD_MAJOR 202 /* Xen virtual block device */
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#define MSR_MAJOR 202
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#define CPUID_MAJOR 203
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#define OSST_MAJOR 206 /* OnStream-SCx0 SCSI tape */
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#define IBM_TTY3270_MAJOR 227
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#define IBM_FS3270_MAJOR 228
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#define VIOTAPE_MAJOR 230
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#define BLOCK_EXT_MAJOR 259
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#endif
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