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4cc4e49a | 1 | .. _cn_magicnumbers: |
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4cc4e49a | 3 | .. include:: ../disclaimer-zh_CN.rst |
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4cc4e49a | 5 | :Original: :ref:`Documentation/process/magic-number.rst <magicnumbers>` |
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6 | |
7 | 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 | |
4cc4e49a | 8 | 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:: |
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10 | 中文版维护者: 贾威威 Jia Wei Wei <harryxiyou@gmail.com> |
11 | 中文版翻译者: 贾威威 Jia Wei Wei <harryxiyou@gmail.com> | |
12 | 中文版校译者: 贾威威 Jia Wei Wei <harryxiyou@gmail.com> | |
13 | ||
14 | Linux 魔术数 | |
15 | ============ | |
9194a595 | 16 | |
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17 | 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。 |
18 | ||
19 | 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。 | |
20 | ||
4cc4e49a | 21 | 使用魔术值的方法是在结构的开始处声明的,如下:: |
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23 | struct tty_ldisc { |
24 | int magic; | |
25 | ... | |
26 | }; | |
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27 | |
28 | 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。 | |
29 | ||
30 | Theodore Ts'o | |
31 | 31 Mar 94 | |
32 | ||
33 | 给当前的Linux 2.1.55添加魔术表。 | |
34 | ||
35 | Michael Chastain | |
36 | <mailto:mec@shout.net> | |
37 | 22 Sep 1997 | |
38 | ||
39 | 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。 | |
40 | ||
41 | Krzysztof G.Baranowski | |
42 | <mailto: kgb@knm.org.pl> | |
43 | 29 Jul 1998 | |
44 | ||
45 | 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。 | |
46 | ||
47 | Petr Baudis | |
48 | <pasky@ucw.cz> | |
49 | 03 Nov 2002 | |
50 | ||
51 | 更新魔术表到Linux 2.5.74。 | |
52 | ||
53 | Fabian Frederick | |
54 | <ffrederick@users.sourceforge.net> | |
55 | 09 Jul 2003 | |
56 | ||
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57 | ===================== ================ ======================== ========================================== |
58 | 魔术数名 数字 结构 文件 | |
59 | ===================== ================ ======================== ========================================== | |
60 | PG_MAGIC 'P' pg_{read,write}_hdr ``include/linux/pg.h`` | |
61 | CMAGIC 0x0111 user ``include/linux/a.out.h`` | |
62 | MKISS_DRIVER_MAGIC 0x04bf mkiss_channel ``drivers/net/mkiss.h`` | |
63 | HDLC_MAGIC 0x239e n_hdlc ``drivers/char/n_hdlc.c`` | |
64 | APM_BIOS_MAGIC 0x4101 apm_user ``arch/x86/kernel/apm_32.c`` | |
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65 | DB_MAGIC 0x4442 fc_info ``drivers/net/iph5526_novram.c`` |
66 | DL_MAGIC 0x444d fc_info ``drivers/net/iph5526_novram.c`` | |
67 | FASYNC_MAGIC 0x4601 fasync_struct ``include/linux/fs.h`` | |
68 | FF_MAGIC 0x4646 fc_info ``drivers/net/iph5526_novram.c`` | |
69 | ISICOM_MAGIC 0x4d54 isi_port ``include/linux/isicom.h`` | |
70 | PTY_MAGIC 0x5001 ``drivers/char/pty.c`` | |
71 | PPP_MAGIC 0x5002 ppp ``include/linux/if_pppvar.h`` | |
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72 | SSTATE_MAGIC 0x5302 serial_state ``include/linux/serial.h`` |
73 | SLIP_MAGIC 0x5302 slip ``drivers/net/slip.h`` | |
74 | STRIP_MAGIC 0x5303 strip ``drivers/net/strip.c`` | |
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75 | SIXPACK_MAGIC 0x5304 sixpack ``drivers/net/hamradio/6pack.h`` |
76 | AX25_MAGIC 0x5316 ax_disp ``drivers/net/mkiss.h`` | |
77 | TTY_MAGIC 0x5401 tty_struct ``include/linux/tty.h`` | |
78 | MGSL_MAGIC 0x5401 mgsl_info ``drivers/char/synclink.c`` | |
79 | TTY_DRIVER_MAGIC 0x5402 tty_driver ``include/linux/tty_driver.h`` | |
80 | MGSLPC_MAGIC 0x5402 mgslpc_info ``drivers/char/pcmcia/synclink_cs.c`` | |
81 | TTY_LDISC_MAGIC 0x5403 tty_ldisc ``include/linux/tty_ldisc.h`` | |
82 | USB_SERIAL_MAGIC 0x6702 usb_serial ``drivers/usb/serial/usb-serial.h`` | |
83 | FULL_DUPLEX_MAGIC 0x6969 ``drivers/net/ethernet/dec/tulip/de2104x.c`` | |
84 | USB_BLUETOOTH_MAGIC 0x6d02 usb_bluetooth ``drivers/usb/class/bluetty.c`` | |
85 | RFCOMM_TTY_MAGIC 0x6d02 ``net/bluetooth/rfcomm/tty.c`` | |
86 | USB_SERIAL_PORT_MAGIC 0x7301 usb_serial_port ``drivers/usb/serial/usb-serial.h`` | |
87 | CG_MAGIC 0x00090255 ufs_cylinder_group ``include/linux/ufs_fs.h`` | |
88 | RPORT_MAGIC 0x00525001 r_port ``drivers/char/rocket_int.h`` | |
89 | LSEMAGIC 0x05091998 lse ``drivers/fc4/fc.c`` | |
90 | GDTIOCTL_MAGIC 0x06030f07 gdth_iowr_str ``drivers/scsi/gdth_ioctl.h`` | |
91 | RIEBL_MAGIC 0x09051990 ``drivers/net/atarilance.c`` | |
92 | NBD_REQUEST_MAGIC 0x12560953 nbd_request ``include/linux/nbd.h`` | |
93 | RED_MAGIC2 0x170fc2a5 (any) ``mm/slab.c`` | |
94 | BAYCOM_MAGIC 0x19730510 baycom_state ``drivers/net/baycom_epp.c`` | |
95 | ISDN_X25IFACE_MAGIC 0x1e75a2b9 isdn_x25iface_proto_data ``drivers/isdn/isdn_x25iface.h`` | |
96 | ECP_MAGIC 0x21504345 cdkecpsig ``include/linux/cdk.h`` | |
97 | LSOMAGIC 0x27091997 lso ``drivers/fc4/fc.c`` | |
98 | LSMAGIC 0x2a3b4d2a ls ``drivers/fc4/fc.c`` | |
99 | WANPIPE_MAGIC 0x414C4453 sdla_{dump,exec} ``include/linux/wanpipe.h`` | |
100 | CS_CARD_MAGIC 0x43525553 cs_card ``sound/oss/cs46xx.c`` | |
101 | LABELCL_MAGIC 0x4857434c labelcl_info_s ``include/asm/ia64/sn/labelcl.h`` | |
102 | ISDN_ASYNC_MAGIC 0x49344C01 modem_info ``include/linux/isdn.h`` | |
103 | CTC_ASYNC_MAGIC 0x49344C01 ctc_tty_info ``drivers/s390/net/ctctty.c`` | |
104 | ISDN_NET_MAGIC 0x49344C02 isdn_net_local_s ``drivers/isdn/i4l/isdn_net_lib.h`` | |
105 | SAVEKMSG_MAGIC2 0x4B4D5347 savekmsg ``arch/*/amiga/config.c`` | |
106 | CS_STATE_MAGIC 0x4c4f4749 cs_state ``sound/oss/cs46xx.c`` | |
107 | SLAB_C_MAGIC 0x4f17a36d kmem_cache ``mm/slab.c`` | |
108 | COW_MAGIC 0x4f4f4f4d cow_header_v1 ``arch/um/drivers/ubd_user.c`` | |
109 | I810_CARD_MAGIC 0x5072696E i810_card ``sound/oss/i810_audio.c`` | |
110 | TRIDENT_CARD_MAGIC 0x5072696E trident_card ``sound/oss/trident.c`` | |
111 | ROUTER_MAGIC 0x524d4157 wan_device [in ``wanrouter.h`` pre 3.9] | |
112 | SAVEKMSG_MAGIC1 0x53415645 savekmsg ``arch/*/amiga/config.c`` | |
113 | GDA_MAGIC 0x58464552 gda ``arch/mips/include/asm/sn/gda.h`` | |
114 | RED_MAGIC1 0x5a2cf071 (any) ``mm/slab.c`` | |
115 | EEPROM_MAGIC_VALUE 0x5ab478d2 lanai_dev ``drivers/atm/lanai.c`` | |
116 | HDLCDRV_MAGIC 0x5ac6e778 hdlcdrv_state ``include/linux/hdlcdrv.h`` | |
117 | PCXX_MAGIC 0x5c6df104 channel ``drivers/char/pcxx.h`` | |
118 | KV_MAGIC 0x5f4b565f kernel_vars_s ``arch/mips/include/asm/sn/klkernvars.h`` | |
119 | I810_STATE_MAGIC 0x63657373 i810_state ``sound/oss/i810_audio.c`` | |
120 | TRIDENT_STATE_MAGIC 0x63657373 trient_state ``sound/oss/trident.c`` | |
121 | M3_CARD_MAGIC 0x646e6f50 m3_card ``sound/oss/maestro3.c`` | |
122 | FW_HEADER_MAGIC 0x65726F66 fw_header ``drivers/atm/fore200e.h`` | |
123 | SLOT_MAGIC 0x67267321 slot ``drivers/hotplug/cpqphp.h`` | |
124 | SLOT_MAGIC 0x67267322 slot ``drivers/hotplug/acpiphp.h`` | |
125 | LO_MAGIC 0x68797548 nbd_device ``include/linux/nbd.h`` | |
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126 | M3_STATE_MAGIC 0x734d724d m3_state ``sound/oss/maestro3.c`` |
127 | VMALLOC_MAGIC 0x87654320 snd_alloc_track ``sound/core/memory.c`` | |
128 | KMALLOC_MAGIC 0x87654321 snd_alloc_track ``sound/core/memory.c`` | |
129 | PWC_MAGIC 0x89DC10AB pwc_device ``drivers/usb/media/pwc.h`` | |
130 | NBD_REPLY_MAGIC 0x96744668 nbd_reply ``include/linux/nbd.h`` | |
131 | ENI155_MAGIC 0xa54b872d midway_eprom ``drivers/atm/eni.h`` | |
132 | CODA_MAGIC 0xC0DAC0DA coda_file_info ``fs/coda/coda_fs_i.h`` | |
133 | DPMEM_MAGIC 0xc0ffee11 gdt_pci_sram ``drivers/scsi/gdth.h`` | |
134 | YAM_MAGIC 0xF10A7654 yam_port ``drivers/net/hamradio/yam.c`` | |
135 | CCB_MAGIC 0xf2691ad2 ccb ``drivers/scsi/ncr53c8xx.c`` | |
136 | QUEUE_MAGIC_FREE 0xf7e1c9a3 queue_entry ``drivers/scsi/arm/queue.c`` | |
137 | QUEUE_MAGIC_USED 0xf7e1cc33 queue_entry ``drivers/scsi/arm/queue.c`` | |
138 | HTB_CMAGIC 0xFEFAFEF1 htb_class ``net/sched/sch_htb.c`` | |
139 | NMI_MAGIC 0x48414d4d455201 nmi_s ``arch/mips/include/asm/sn/nmi.h`` | |
140 | ===================== ================ ======================== ========================================== | |
141 | ||
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a9e73211 | 143 | 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。 |
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144 | |
145 | 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。 | |
146 | ||
147 | 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。 |