| 1 |
62 |
marcus.erl |
This file is a registry of magic numbers which are in use. When you
|
| 2 |
|
|
add a magic number to a structure, you should also add it to this
|
| 3 |
|
|
file, since it is best if the magic numbers used by various structures
|
| 4 |
|
|
are unique.
|
| 5 |
|
|
|
| 6 |
|
|
It is a *very* good idea to protect kernel data structures with magic
|
| 7 |
|
|
numbers. This allows you to check at run time whether (a) a structure
|
| 8 |
|
|
has been clobbered, or (b) you've passed the wrong structure to a
|
| 9 |
|
|
routine. This last is especially useful --- particularly when you are
|
| 10 |
|
|
passing pointers to structures via a void * pointer. The tty code,
|
| 11 |
|
|
for example, does this frequently to pass driver-specific and line
|
| 12 |
|
|
discipline-specific structures back and forth.
|
| 13 |
|
|
|
| 14 |
|
|
The way to use magic numbers is to declare then at the beginning of
|
| 15 |
|
|
the structure, like so:
|
| 16 |
|
|
|
| 17 |
|
|
struct tty_ldisc {
|
| 18 |
|
|
int magic;
|
| 19 |
|
|
...
|
| 20 |
|
|
};
|
| 21 |
|
|
|
| 22 |
|
|
Please follow this discipline when you are adding future enhancements
|
| 23 |
|
|
to the kernel! It has saved me countless hours of debugging,
|
| 24 |
|
|
especially in the screwy cases where an array has been overrun and
|
| 25 |
|
|
structures following the array have been overwritten. Using this
|
| 26 |
|
|
discipline, these cases get detected quickly and safely.
|
| 27 |
|
|
|
| 28 |
|
|
Theodore Ts'o
|
| 29 |
|
|
31 Mar 94
|
| 30 |
|
|
|
| 31 |
|
|
The magic table is current to Linux 2.1.55.
|
| 32 |
|
|
|
| 33 |
|
|
Michael Chastain
|
| 34 |
|
|
|
| 35 |
|
|
22 Sep 1997
|
| 36 |
|
|
|
| 37 |
|
|
Now it should be up to date with Linux 2.1.112. Because
|
| 38 |
|
|
we are in feature freeze time it is very unlikely that
|
| 39 |
|
|
something will change before 2.2.x. The entries are
|
| 40 |
|
|
sorted by number field.
|
| 41 |
|
|
|
| 42 |
|
|
Krzysztof G. Baranowski
|
| 43 |
|
|
|
| 44 |
|
|
29 Jul 1998
|
| 45 |
|
|
|
| 46 |
|
|
Updated the magic table to Linux 2.5.45. Right over the feature freeze,
|
| 47 |
|
|
but it is possible that some new magic numbers will sneak into the
|
| 48 |
|
|
kernel before 2.6.x yet.
|
| 49 |
|
|
|
| 50 |
|
|
Petr Baudis
|
| 51 |
|
|
|
| 52 |
|
|
03 Nov 2002
|
| 53 |
|
|
|
| 54 |
|
|
Updated the magic table to Linux 2.5.74.
|
| 55 |
|
|
|
| 56 |
|
|
Fabian Frederick
|
| 57 |
|
|
|
| 58 |
|
|
09 Jul 2003
|
| 59 |
|
|
|
| 60 |
|
|
|
| 61 |
|
|
Magic Name Number Structure File
|
| 62 |
|
|
===========================================================================
|
| 63 |
|
|
PG_MAGIC 'P' pg_{read,write}_hdr include/linux/pg.h
|
| 64 |
|
|
CMAGIC 0x0111 user include/linux/a.out.h
|
| 65 |
|
|
MKISS_DRIVER_MAGIC 0x04bf mkiss_channel drivers/net/mkiss.h
|
| 66 |
|
|
RISCOM8_MAGIC 0x0907 riscom_port drivers/char/riscom8.h
|
| 67 |
|
|
SPECIALIX_MAGIC 0x0907 specialix_port drivers/char/specialix_io8.h
|
| 68 |
|
|
HDLC_MAGIC 0x239e n_hdlc drivers/char/n_hdlc.c
|
| 69 |
|
|
APM_BIOS_MAGIC 0x4101 apm_user arch/i386/kernel/apm.c
|
| 70 |
|
|
CYCLADES_MAGIC 0x4359 cyclades_port include/linux/cyclades.h
|
| 71 |
|
|
DB_MAGIC 0x4442 fc_info drivers/net/iph5526_novram.c
|
| 72 |
|
|
DL_MAGIC 0x444d fc_info drivers/net/iph5526_novram.c
|
| 73 |
|
|
FASYNC_MAGIC 0x4601 fasync_struct include/linux/fs.h
|
| 74 |
|
|
FF_MAGIC 0x4646 fc_info drivers/net/iph5526_novram.c
|
| 75 |
|
|
ISICOM_MAGIC 0x4d54 isi_port include/linux/isicom.h
|
| 76 |
|
|
PTY_MAGIC 0x5001 drivers/char/pty.c
|
| 77 |
|
|
PPP_MAGIC 0x5002 ppp include/linux/if_pppvar.h
|
| 78 |
|
|
SERIAL_MAGIC 0x5301 async_struct include/linux/serial.h
|
| 79 |
|
|
SSTATE_MAGIC 0x5302 serial_state include/linux/serial.h
|
| 80 |
|
|
SLIP_MAGIC 0x5302 slip drivers/net/slip.h
|
| 81 |
|
|
STRIP_MAGIC 0x5303 strip drivers/net/strip.c
|
| 82 |
|
|
X25_ASY_MAGIC 0x5303 x25_asy drivers/net/x25_asy.h
|
| 83 |
|
|
SIXPACK_MAGIC 0x5304 sixpack drivers/net/hamradio/6pack.h
|
| 84 |
|
|
AX25_MAGIC 0x5316 ax_disp drivers/net/mkiss.h
|
| 85 |
|
|
ESP_MAGIC 0x53ee esp_struct drivers/char/esp.h
|
| 86 |
|
|
TTY_MAGIC 0x5401 tty_struct include/linux/tty.h
|
| 87 |
|
|
MGSL_MAGIC 0x5401 mgsl_info drivers/char/synclink.c
|
| 88 |
|
|
TTY_DRIVER_MAGIC 0x5402 tty_driver include/linux/tty_driver.h
|
| 89 |
|
|
MGSLPC_MAGIC 0x5402 mgslpc_info drivers/char/pcmcia/synclink_cs.c
|
| 90 |
|
|
TTY_LDISC_MAGIC 0x5403 tty_ldisc include/linux/tty_ldisc.h
|
| 91 |
|
|
USB_SERIAL_MAGIC 0x6702 usb_serial drivers/usb/serial/usb-serial.h
|
| 92 |
|
|
FULL_DUPLEX_MAGIC 0x6969 drivers/net/tulip/de2104x.c
|
| 93 |
|
|
USB_BLUETOOTH_MAGIC 0x6d02 usb_bluetooth drivers/usb/class/bluetty.c
|
| 94 |
|
|
RFCOMM_TTY_MAGIC 0x6d02 net/bluetooth/rfcomm/tty.c
|
| 95 |
|
|
USB_SERIAL_PORT_MAGIC 0x7301 usb_serial_port drivers/usb/serial/usb-serial.h
|
| 96 |
|
|
CG_MAGIC 0x00090255 ufs_cylinder_group include/linux/ufs_fs.h
|
| 97 |
|
|
A2232_MAGIC 0x000a2232 gs_port drivers/char/ser_a2232.h
|
| 98 |
|
|
SOLARIS_SOCKET_MAGIC 0x000ADDED sol_socket_struct arch/sparc64/solaris/socksys.h
|
| 99 |
|
|
RPORT_MAGIC 0x00525001 r_port drivers/char/rocket_int.h
|
| 100 |
|
|
LSEMAGIC 0x05091998 lse drivers/fc4/fc.c
|
| 101 |
|
|
GDTIOCTL_MAGIC 0x06030f07 gdth_iowr_str drivers/scsi/gdth_ioctl.h
|
| 102 |
|
|
RIEBL_MAGIC 0x09051990 drivers/net/atarilance.c
|
| 103 |
|
|
RIO_MAGIC 0x12345678 gs_port drivers/char/rio/rio_linux.c
|
| 104 |
|
|
SX_MAGIC 0x12345678 gs_port drivers/char/sx.h
|
| 105 |
|
|
NBD_REQUEST_MAGIC 0x12560953 nbd_request include/linux/nbd.h
|
| 106 |
|
|
RED_MAGIC2 0x170fc2a5 (any) mm/slab.c
|
| 107 |
|
|
BAYCOM_MAGIC 0x19730510 baycom_state drivers/net/baycom_epp.c
|
| 108 |
|
|
ISDN_X25IFACE_MAGIC 0x1e75a2b9 isdn_x25iface_proto_data
|
| 109 |
|
|
drivers/isdn/isdn_x25iface.h
|
| 110 |
|
|
ECP_MAGIC 0x21504345 cdkecpsig include/linux/cdk.h
|
| 111 |
|
|
LSOMAGIC 0x27091997 lso drivers/fc4/fc.c
|
| 112 |
|
|
LSMAGIC 0x2a3b4d2a ls drivers/fc4/fc.c
|
| 113 |
|
|
WANPIPE_MAGIC 0x414C4453 sdla_{dump,exec} include/linux/wanpipe.h
|
| 114 |
|
|
CS_CARD_MAGIC 0x43525553 cs_card sound/oss/cs46xx.c
|
| 115 |
|
|
LABELCL_MAGIC 0x4857434c labelcl_info_s include/asm/ia64/sn/labelcl.h
|
| 116 |
|
|
ISDN_ASYNC_MAGIC 0x49344C01 modem_info include/linux/isdn.h
|
| 117 |
|
|
CTC_ASYNC_MAGIC 0x49344C01 ctc_tty_info drivers/s390/net/ctctty.c
|
| 118 |
|
|
ISDN_NET_MAGIC 0x49344C02 isdn_net_local_s drivers/isdn/i4l/isdn_net_lib.h
|
| 119 |
|
|
SAVEKMSG_MAGIC2 0x4B4D5347 savekmsg arch/*/amiga/config.c
|
| 120 |
|
|
STLI_BOARDMAGIC 0x4bc6c825 stlibrd include/linux/istallion.h
|
| 121 |
|
|
CS_STATE_MAGIC 0x4c4f4749 cs_state sound/oss/cs46xx.c
|
| 122 |
|
|
SLAB_C_MAGIC 0x4f17a36d kmem_cache mm/slab.c
|
| 123 |
|
|
COW_MAGIC 0x4f4f4f4d cow_header_v1 arch/um/drivers/ubd_user.c
|
| 124 |
|
|
I810_CARD_MAGIC 0x5072696E i810_card sound/oss/i810_audio.c
|
| 125 |
|
|
TRIDENT_CARD_MAGIC 0x5072696E trident_card sound/oss/trident.c
|
| 126 |
|
|
ROUTER_MAGIC 0x524d4157 wan_device include/linux/wanrouter.h
|
| 127 |
|
|
SCC_MAGIC 0x52696368 gs_port drivers/char/scc.h
|
| 128 |
|
|
SAVEKMSG_MAGIC1 0x53415645 savekmsg arch/*/amiga/config.c
|
| 129 |
|
|
GDA_MAGIC 0x58464552 gda include/asm-mips64/sn/gda.h
|
| 130 |
|
|
RED_MAGIC1 0x5a2cf071 (any) mm/slab.c
|
| 131 |
|
|
STL_PORTMAGIC 0x5a7182c9 stlport include/linux/stallion.h
|
| 132 |
|
|
EEPROM_MAGIC_VALUE 0x5ab478d2 lanai_dev drivers/atm/lanai.c
|
| 133 |
|
|
HDLCDRV_MAGIC 0x5ac6e778 hdlcdrv_state include/linux/hdlcdrv.h
|
| 134 |
|
|
EPCA_MAGIC 0x5c6df104 channel include/linux/epca.h
|
| 135 |
|
|
PCXX_MAGIC 0x5c6df104 channel drivers/char/pcxx.h
|
| 136 |
|
|
KV_MAGIC 0x5f4b565f kernel_vars_s include/asm-mips64/sn/klkernvars.h
|
| 137 |
|
|
I810_STATE_MAGIC 0x63657373 i810_state sound/oss/i810_audio.c
|
| 138 |
|
|
TRIDENT_STATE_MAGIC 0x63657373 trient_state sound/oss/trident.c
|
| 139 |
|
|
M3_CARD_MAGIC 0x646e6f50 m3_card sound/oss/maestro3.c
|
| 140 |
|
|
FW_HEADER_MAGIC 0x65726F66 fw_header drivers/atm/fore200e.h
|
| 141 |
|
|
SLOT_MAGIC 0x67267321 slot drivers/hotplug/cpqphp.h
|
| 142 |
|
|
SLOT_MAGIC 0x67267322 slot drivers/hotplug/acpiphp.h
|
| 143 |
|
|
LO_MAGIC 0x68797548 nbd_device include/linux/nbd.h
|
| 144 |
|
|
OPROFILE_MAGIC 0x6f70726f super_block drivers/oprofile/oprofilefs.h
|
| 145 |
|
|
M3_STATE_MAGIC 0x734d724d m3_state sound/oss/maestro3.c
|
| 146 |
|
|
STL_PANELMAGIC 0x7ef621a1 stlpanel include/linux/stallion.h
|
| 147 |
|
|
VMALLOC_MAGIC 0x87654320 snd_alloc_track sound/core/memory.c
|
| 148 |
|
|
KMALLOC_MAGIC 0x87654321 snd_alloc_track sound/core/memory.c
|
| 149 |
|
|
PWC_MAGIC 0x89DC10AB pwc_device drivers/usb/media/pwc.h
|
| 150 |
|
|
NBD_REPLY_MAGIC 0x96744668 nbd_reply include/linux/nbd.h
|
| 151 |
|
|
STL_BOARDMAGIC 0xa2267f52 stlbrd include/linux/stallion.h
|
| 152 |
|
|
ENI155_MAGIC 0xa54b872d midway_eprom drivers/atm/eni.h
|
| 153 |
|
|
SCI_MAGIC 0xbabeface gs_port drivers/char/sh-sci.h
|
| 154 |
|
|
CODA_MAGIC 0xC0DAC0DA coda_file_info include/linux/coda_fs_i.h
|
| 155 |
|
|
DPMEM_MAGIC 0xc0ffee11 gdt_pci_sram drivers/scsi/gdth.h
|
| 156 |
|
|
STLI_PORTMAGIC 0xe671c7a1 stliport include/linux/istallion.h
|
| 157 |
|
|
YAM_MAGIC 0xF10A7654 yam_port drivers/net/hamradio/yam.c
|
| 158 |
|
|
CCB_MAGIC 0xf2691ad2 ccb drivers/scsi/ncr53c8xx.c
|
| 159 |
|
|
QUEUE_MAGIC_FREE 0xf7e1c9a3 queue_entry drivers/scsi/arm/queue.c
|
| 160 |
|
|
QUEUE_MAGIC_USED 0xf7e1cc33 queue_entry drivers/scsi/arm/queue.c
|
| 161 |
|
|
HTB_CMAGIC 0xFEFAFEF1 htb_class net/sched/sch_htb.c
|
| 162 |
|
|
NMI_MAGIC 0x48414d4d455201 nmi_s include/asm-mips64/sn/nmi.h
|
| 163 |
|
|
|
| 164 |
|
|
Note that there are also defined special per-driver magic numbers in sound
|
| 165 |
|
|
memory management. See include/sound/sndmagic.h for complete list of them. Many
|
| 166 |
|
|
OSS sound drivers have their magic numbers constructed from the soundcard PCI
|
| 167 |
|
|
ID - these are not listed here as well.
|
| 168 |
|
|
|
| 169 |
|
|
IrDA subsystem also uses large number of own magic numbers, see
|
| 170 |
|
|
include/net/irda/irda.h for a complete list of them.
|
| 171 |
|
|
|
| 172 |
|
|
HFS is another larger user of magic numbers - you can find them in
|
| 173 |
|
|
fs/hfs/hfs.h.
|
