IBM AIX Continuous Availability Features - IBM Redbooks

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int pthread_attr_setukeyset_np (pthread_attr_t *attr, ukeyset_t *ukeyset) This sets a thread attributes object's user key set attribute. ukeyset_t ukeyset_activate (ukeyset_t set, int command) This activates a user keyset and returns the current user keyset. The value of “command” can be one of the following: UKA_REPLACE_KEYS: Replace keyset with the specified keyset. UKA_ADD_KEYS: Add the specified keyset to the current keyset. UKA_REMOVE_KEYS: Remove the specified keyset from the active keyset. UKA_GET_KEYS: Read the current key value without updating the current keyset. The input keyset is ignored. 3.7.8 Kernel debugger commands The kernel debugger (KDB) has some new and changed commands to help you with storage protection keys. These commands are listed in Table 3-6. Table 3-6 New and changed kernel debugger commands Kernel debugger command Explanation kkeymap Displays the available hardware keys and the kernel keys that map to each. kkeymap Displays the mapping of the specified kernel key to a hardware key (-1 indicates that the kernel key is not mapped). hkeymap Displays all the kernel keys that map to the specified hardware key. kkeyset Displays the kernel key access rights represented by a kernel keyset. The operand of this command is the address of the pointer to the opaque kernel keyset, not the kernel keyset structure itself. hkeyset Displays the hardware key accesses represented by this value if used in the AMR, and a sampling of the kernel keys involved. dr amr Displays the current AMR and the access rights it represents. dr sp Includes the AMR value. mr amr Allows modification of the AMR. dk 1 Displays the hardware key of the resident virtual page containing eaddr. mst Displays the AMR and context stack values. A storage key protection exception is indicated in excp_type as DSISR_SKEY. iplcb Displays the IBM processor-storage-keys property of a CPU, which indicates the number of hardware keys supported. This is in section /cpus/PowerPC of the device tree. vmlog Shows an exception value of EXCEPT_SKEY for a storage key violation. pft Displays the hardware key (labeled hkey) value for the page. pte Displays the hardware key (labeled sk) value for the page. scb Displays the hardware key default set for the segment. 108 IBM AIX Continuous Availability Features
Kernel debugger command Explanation heap Displays the kernel and hardware keys associated with an xmalloc heap. In the following examples we show storage key features using the kernel debugger (kdb). A full mapping of kernel-to-hardware keys is shown in Example 3-35. Example 3-35 Kernel-to-hardware key mapping (0)> kk kkey hkey name(s) 0 0 UPUBLIC 1 1 UPRIVATE1 32 0 FILE_DATA 33 2 PUBLIC 34 3 BLOCK_DEV LVM RAMDISK FILE_SYSTEM NFS CACHEFS AUTOFS KRB5 SWAPNFS 36 4 COMMO NETM IPSEC USB GRAPHICS 40 5 DMA PCI VDEV TRB IOMAP 43 5 PRIVATE* 75 6 VMM_PMAP IOS IPC RAS LDATA_ALLOC KRLOCK XMALLOC KKEYSET J2 81 6 FILE_METADATA 77 7 PROC INTR VMM LFS CRED LDR KER Note: In Example 3-35, the kernel key number (kkey) is that of the first key in the row. There is no guarantee that the other keys in the row are numbered sequentially. The name for kernel key 3: (0)> kk 3 KKEY_UPRIVATE3(3) -> hkey -1 The hardware key corresponding to VMM_PMAP: (0)> kk VMM_PMAP KKEY_VMM_PMAP(75) -> hkey 6 The kernel keys corresponding to hardware key 6: (0)> hk 6 VMM_PMAP IOS IPC RAS LDATA_ALLOC KRLOCK XMALLOC KKEYSET J2 FILE_METADATA The hardware keys and corresponding kernel keys in current context: (0)> dr amr amr : F3FC000000000000 hkey 2 RW PUBLIC hkey 7 RW PROC INTR VMM LFS CRED LDR KER Example 3-36 shows the Authority Mask Register (AMR) value for the current Machine Status Table (MST). Example 3-36 Machine Status Table (MST) (0)> mst Chapter 3. AIX advanced continuous availability tools and features 109
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Front cover IBM AIX Continuous Avai
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Note: Before using this information
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2.3.7 Minidump . . . . . . . . . .
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vi IBM AIX Continuous Availability
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Trademarks The following terms are
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Engineering degree in Computer Scie
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Find out more about the residency p
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1.1 Overview In May 2007, IBM intro
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1.5 Continuous operations Continuou
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1.6.2 Availability 1.6.3 Serviceabi
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IBM has tried to enhance FFDC featu
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10 IBM AIX Continuous Availability
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2.1 System availability AIX is buil
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On AIX 5.3, the only way to persist
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When used on a standalone server (s
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mirrored volume group on the client
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2.2.1 Error checking Run-Time Error
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The PowerPC hardware gives software
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System dumps can also be user-initi
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Live dumps are small dumps that do
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Trace is a valuable tool for observ
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Component Trace uses mechanisms sim
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2.3.14 syslog To display the boot l
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Logging can be added to many of the
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compression: on path specification:
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2.4.4 EtherChannel network traffic
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2.4.6 2-Port Adapter-based Ethernet
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operations) without affecting produ
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Quorum A quorum is a vote of the nu
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2.5.8 Journaled File System-related
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Fast I/O failure is controlled by a
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display its output in a format suit
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For more detailed information about
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54 IBM AIX Continuous Availability
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3.1 AIX Reliability, Availability,
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Page 82 and 83: .vmker | YES | ON/3 | OFF/3 .vmpool
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Page 86 and 87: Table 3-3 Concurrent update termino
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Page 90 and 91: Setting efix state to: STABLE +----
Page 92 and 93: mode, storage keys are called user
Page 94 and 95: Example 3-19 shows the SMIT menu fo
Page 96 and 97: might share a given hardware key. M
Page 98 and 99: KKEY_UPUBLIC, KKEY_FILE_DATA KKEY_U
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Page 104 and 105: added a protection gate for the int
Page 106 and 107: } printf("hardware keyset after KER
Page 108 and 109: } param=atoi(*(argv+1)); printf("Te
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Page 112 and 113: 3 : 000000000000000A r4 : F10006C00
Page 114 and 115: 3.7.7 User mode protection keys Use
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Page 118 and 119: if (!strcmp(*(argv+1),"read")){ if
Page 120 and 121: strlen() at 0xd010da00 _doprnt(??,
Page 124 and 125: Machine State Save Area iar : 00000
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Page 130 and 131: ► An optional predicate The predi
Page 132 and 133: 3. Interval probe manager The inter
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Page 136 and 137: ► Errno names ► Signal names
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Page 150 and 151: 3.9.6 KDB commands for XMDBG ► xm
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Page 154 and 155: Name AIX version Hardware required
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Page 162 and 163: sysdumpdev 27 tprof 28 trace 28 trc
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