summaryrefslogtreecommitdiff
path: root/Documentation/translations/zh_CN/process/magic-number.rst
blob: e4c225996af0ff32ed5c6f762c9faff0a6eb34ed (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
.. _cn_magicnumbers:

.. include:: ../disclaimer-zh_CN.rst

:Original: :ref:`Documentation/process/magic-number.rst <magicnumbers>`

如果想评论或更新本文的内容,请直接发信到LKML。如果你使用英文交流有困难的话,也可
以向中文版维护者求助。如果本翻译更新不及时或者翻译存在问题,请联系中文版维护者::

        中文版维护者: 贾威威 Jia Wei Wei <harryxiyou@gmail.com>
        中文版翻译者: 贾威威 Jia Wei Wei <harryxiyou@gmail.com>
        中文版校译者: 贾威威 Jia Wei Wei <harryxiyou@gmail.com>

Linux 魔术数
============

这个文件是有关当前使用的魔术值注册表。当你给一个结构添加了一个魔术值,你也应该把这个魔术值添加到这个文件,因为我们最好把用于各种结构的魔术值统一起来。

使用魔术值来保护内核数据结构是一个非常好的主意。这就允许你在运行期检查(a)一个结构是否已经被攻击,或者(b)你已经给一个例行程序通过了一个错误的结构。后一种情况特别地有用---特别是当你通过一个空指针指向结构体的时候。tty源码,例如,经常通过特定驱动使用这种方法并且反复地排列特定方面的结构。

使用魔术值的方法是在结构的开始处声明的,如下::

        struct tty_ldisc {
	        int	magic;
        	...
        };

当你以后给内核添加增强功能的时候,请遵守这条规则!这样就会节省数不清的调试时间,特别是一些古怪的情况,例如,数组超出范围并且重新写了超出部分。遵守这个规则,‪这些情况可以被快速地,安全地避免。

		Theodore Ts'o
		  31 Mar 94

给当前的Linux 2.1.55添加魔术表。

		Michael Chastain
		<mailto:mec@shout.net>
		22 Sep 1997

现在应该最新的Linux 2.1.112.因为在特性冻结期间,不能在2.2.x前改变任何东西。这些条目被数域所排序。

		Krzysztof G.Baranowski
	        <mailto: kgb@knm.org.pl>
		29 Jul 1998

更新魔术表到Linux 2.5.45。刚好越过特性冻结,但是有可能还会有一些新的魔术值在2.6.x之前融入到内核中。

		Petr Baudis
		<pasky@ucw.cz>
		03 Nov 2002

更新魔术表到Linux 2.5.74。

		Fabian Frederick
                <ffrederick@users.sourceforge.net>
		09 Jul 2003

===================== ================ ======================== ==========================================
魔术数名              数字             结构                     文件
===================== ================ ======================== ==========================================
PG_MAGIC              'P'              pg_{read,write}_hdr      ``include/linux/pg.h``
CMAGIC                0x0111           user                     ``include/linux/a.out.h``
MKISS_DRIVER_MAGIC    0x04bf           mkiss_channel            ``drivers/net/mkiss.h``
HDLC_MAGIC            0x239e           n_hdlc                   ``drivers/char/n_hdlc.c``
APM_BIOS_MAGIC        0x4101           apm_user                 ``arch/x86/kernel/apm_32.c``
CYCLADES_MAGIC        0x4359           cyclades_port            ``include/linux/cyclades.h``
DB_MAGIC              0x4442           fc_info                  ``drivers/net/iph5526_novram.c``
DL_MAGIC              0x444d           fc_info                  ``drivers/net/iph5526_novram.c``
FASYNC_MAGIC          0x4601           fasync_struct            ``include/linux/fs.h``
FF_MAGIC              0x4646           fc_info                  ``drivers/net/iph5526_novram.c``
ISICOM_MAGIC          0x4d54           isi_port                 ``include/linux/isicom.h``
PTY_MAGIC             0x5001                                    ``drivers/char/pty.c``
PPP_MAGIC             0x5002           ppp                      ``include/linux/if_pppvar.h``
SSTATE_MAGIC          0x5302           serial_state             ``include/linux/serial.h``
SLIP_MAGIC            0x5302           slip                     ``drivers/net/slip.h``
STRIP_MAGIC           0x5303           strip                    ``drivers/net/strip.c``
X25_ASY_MAGIC         0x5303           x25_asy                  ``drivers/net/x25_asy.h``
SIXPACK_MAGIC         0x5304           sixpack                  ``drivers/net/hamradio/6pack.h``
AX25_MAGIC            0x5316           ax_disp                  ``drivers/net/mkiss.h``
TTY_MAGIC             0x5401           tty_struct               ``include/linux/tty.h``
MGSL_MAGIC            0x5401           mgsl_info                ``drivers/char/synclink.c``
TTY_DRIVER_MAGIC      0x5402           tty_driver               ``include/linux/tty_driver.h``
MGSLPC_MAGIC          0x5402           mgslpc_info              ``drivers/char/pcmcia/synclink_cs.c``
TTY_LDISC_MAGIC       0x5403           tty_ldisc                ``include/linux/tty_ldisc.h``
USB_SERIAL_MAGIC      0x6702           usb_serial               ``drivers/usb/serial/usb-serial.h``
FULL_DUPLEX_MAGIC     0x6969                                    ``drivers/net/ethernet/dec/tulip/de2104x.c``
USB_BLUETOOTH_MAGIC   0x6d02           usb_bluetooth            ``drivers/usb/class/bluetty.c``
RFCOMM_TTY_MAGIC      0x6d02                                    ``net/bluetooth/rfcomm/tty.c``
USB_SERIAL_PORT_MAGIC 0x7301           usb_serial_port          ``drivers/usb/serial/usb-serial.h``
CG_MAGIC              0x00090255       ufs_cylinder_group       ``include/linux/ufs_fs.h``
RPORT_MAGIC           0x00525001       r_port                   ``drivers/char/rocket_int.h``
LSEMAGIC              0x05091998       lse                      ``drivers/fc4/fc.c``
GDTIOCTL_MAGIC        0x06030f07       gdth_iowr_str            ``drivers/scsi/gdth_ioctl.h``
RIEBL_MAGIC           0x09051990                                ``drivers/net/atarilance.c``
NBD_REQUEST_MAGIC     0x12560953       nbd_request              ``include/linux/nbd.h``
RED_MAGIC2            0x170fc2a5       (any)                    ``mm/slab.c``
BAYCOM_MAGIC          0x19730510       baycom_state             ``drivers/net/baycom_epp.c``
ISDN_X25IFACE_MAGIC   0x1e75a2b9       isdn_x25iface_proto_data ``drivers/isdn/isdn_x25iface.h``
ECP_MAGIC             0x21504345       cdkecpsig                ``include/linux/cdk.h``
LSOMAGIC              0x27091997       lso                      ``drivers/fc4/fc.c``
LSMAGIC               0x2a3b4d2a       ls                       ``drivers/fc4/fc.c``
WANPIPE_MAGIC         0x414C4453       sdla_{dump,exec}         ``include/linux/wanpipe.h``
CS_CARD_MAGIC         0x43525553       cs_card                  ``sound/oss/cs46xx.c``
LABELCL_MAGIC         0x4857434c       labelcl_info_s           ``include/asm/ia64/sn/labelcl.h``
ISDN_ASYNC_MAGIC      0x49344C01       modem_info               ``include/linux/isdn.h``
CTC_ASYNC_MAGIC       0x49344C01       ctc_tty_info             ``drivers/s390/net/ctctty.c``
ISDN_NET_MAGIC        0x49344C02       isdn_net_local_s         ``drivers/isdn/i4l/isdn_net_lib.h``
SAVEKMSG_MAGIC2       0x4B4D5347       savekmsg                 ``arch/*/amiga/config.c``
CS_STATE_MAGIC        0x4c4f4749       cs_state                 ``sound/oss/cs46xx.c``
SLAB_C_MAGIC          0x4f17a36d       kmem_cache               ``mm/slab.c``
COW_MAGIC             0x4f4f4f4d       cow_header_v1            ``arch/um/drivers/ubd_user.c``
I810_CARD_MAGIC       0x5072696E       i810_card                ``sound/oss/i810_audio.c``
TRIDENT_CARD_MAGIC    0x5072696E       trident_card             ``sound/oss/trident.c``
ROUTER_MAGIC          0x524d4157       wan_device               [in ``wanrouter.h`` pre 3.9]
SAVEKMSG_MAGIC1       0x53415645       savekmsg                 ``arch/*/amiga/config.c``
GDA_MAGIC             0x58464552       gda                      ``arch/mips/include/asm/sn/gda.h``
RED_MAGIC1            0x5a2cf071       (any)                    ``mm/slab.c``
EEPROM_MAGIC_VALUE    0x5ab478d2       lanai_dev                ``drivers/atm/lanai.c``
HDLCDRV_MAGIC         0x5ac6e778       hdlcdrv_state            ``include/linux/hdlcdrv.h``
PCXX_MAGIC            0x5c6df104       channel                  ``drivers/char/pcxx.h``
KV_MAGIC              0x5f4b565f       kernel_vars_s            ``arch/mips/include/asm/sn/klkernvars.h``
I810_STATE_MAGIC      0x63657373       i810_state               ``sound/oss/i810_audio.c``
TRIDENT_STATE_MAGIC   0x63657373       trient_state             ``sound/oss/trident.c``
M3_CARD_MAGIC         0x646e6f50       m3_card                  ``sound/oss/maestro3.c``
FW_HEADER_MAGIC       0x65726F66       fw_header                ``drivers/atm/fore200e.h``
SLOT_MAGIC            0x67267321       slot                     ``drivers/hotplug/cpqphp.h``
SLOT_MAGIC            0x67267322       slot                     ``drivers/hotplug/acpiphp.h``
LO_MAGIC              0x68797548       nbd_device               ``include/linux/nbd.h``
OPROFILE_MAGIC        0x6f70726f       super_block              ``drivers/oprofile/oprofilefs.h``
M3_STATE_MAGIC        0x734d724d       m3_state                 ``sound/oss/maestro3.c``
VMALLOC_MAGIC         0x87654320       snd_alloc_track          ``sound/core/memory.c``
KMALLOC_MAGIC         0x87654321       snd_alloc_track          ``sound/core/memory.c``
PWC_MAGIC             0x89DC10AB       pwc_device               ``drivers/usb/media/pwc.h``
NBD_REPLY_MAGIC       0x96744668       nbd_reply                ``include/linux/nbd.h``
ENI155_MAGIC          0xa54b872d       midway_eprom	        ``drivers/atm/eni.h``
CODA_MAGIC            0xC0DAC0DA       coda_file_info           ``fs/coda/coda_fs_i.h``
DPMEM_MAGIC           0xc0ffee11       gdt_pci_sram             ``drivers/scsi/gdth.h``
YAM_MAGIC             0xF10A7654       yam_port                 ``drivers/net/hamradio/yam.c``
CCB_MAGIC             0xf2691ad2       ccb                      ``drivers/scsi/ncr53c8xx.c``
QUEUE_MAGIC_FREE      0xf7e1c9a3       queue_entry              ``drivers/scsi/arm/queue.c``
QUEUE_MAGIC_USED      0xf7e1cc33       queue_entry              ``drivers/scsi/arm/queue.c``
HTB_CMAGIC            0xFEFAFEF1       htb_class                ``net/sched/sch_htb.c``
NMI_MAGIC             0x48414d4d455201 nmi_s                    ``arch/mips/include/asm/sn/nmi.h``
===================== ================ ======================== ==========================================


请注意,在声音记忆管理中仍然有一些特殊的为每个驱动定义的魔术值。查看include/sound/sndmagic.h来获取他们完整的列表信息。很多OSS声音驱动拥有自己从声卡PCI ID构建的魔术值-他们也没有被列在这里。

IrDA子系统也使用了大量的自己的魔术值,查看include/net/irda/irda.h来获取他们完整的信息。

HFS是另外一个比较大的使用魔术值的文件系统-你可以在fs/hfs/hfs.h中找到他们。