source: gpfs_3.1_ker2.6.20/lpp/mmfs/bin/mmsdrfsdef.Linux @ 16

Last change on this file since 16 was 16, checked in by rock, 16 years ago
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1#!/bin/ksh
2# IBM_PROLOG_BEGIN_TAG
3# This is an automatically generated prolog.
4# 
5# 
6# 
7# Licensed Materials - Property of IBM
8# 
9# (C) COPYRIGHT International Business Machines Corp. 2000,2006
10# All Rights Reserved
11# 
12# US Government Users Restricted Rights - Use, duplication or
13# disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
14# 
15# IBM_PROLOG_END_TAG
16# @(#)18 1.39.1.1 src/avs/fs/mmfs/ts/admin/mmsdrfsdef.Linux.sh, mmfs, avs_rgpfs24, rgpfs24s007a 9/20/06 11:22:28
17#########################################################################
18#
19#  This file contains declarations and functions that are
20#  unique to the Linux operating system environment.
21#
22#########################################################################
23
24
25#######################################################################
26#
27# Function:  Check whether prerequisite software is installed.
28#
29# Input:     $1 -  Environment type
30#
31# Output:    None
32#
33# Returns:   0 - the prerequisite software for the specified
34#                environment is installed
35#            1 - the prerequisite software for the specified
36#                environment is not installed
37#
38#######################################################################
39function checkPrereqs  # <environmentType>
40{
41  typeset sourceFile="mmsdrfsdef.Linux.sh"
42  [[ -n $DEBUG || -n $DEBUGcheckPrereqs ]] && set -x
43  # $mmTRACE_ENTER "$*"
44  typeset environmentType=$1
45
46  if [[ $environmentType = lc2 ]]
47  then
48    : # There are no special prereqs for cluster type lc2.
49
50  elif [[ $environmentType = single ]]
51  then
52    : # There are no special prereqs for cluster type single.
53
54  else
55    # We should never get called for a cluster type other than
56    # the ones we handle above.  Return with a failure code if we do.
57    return 1
58  fi
59
60  return 0
61
62}  #-------- end of function checkPrereqs ------------------------
63
64
65####################################################################
66#
67# Function:  Create a version of the /etc/fstab file with
68#            all of the mmfs file system stanzas removed
69#
70# Input:     $1 - output file name
71#
72# Output:    None
73#
74# Returns:   0 - processing completed successfully
75#            1 - unexpected error
76#
77####################################################################
78function removeAllStanzas  # <outputFile>
79{
80  typeset sourceFile="mmsdrfsdef.Linux.sh"
81  [[ -n $DEBUG || -n $DEBUGremoveAllStanzas ]] && set -x
82  $mmTRACE_ENTER "$*"
83  typeset outfile=$1
84
85  $rm -f $outfile
86
87  #---------------------------------------------------------
88  # Linux file system stanzas consist of 6 fields.
89  # The third field is fs_vfstype and for GPFS file
90  # systems its value is 'gpfs'.
91  #---------------------------------------------------------
92  $awk '                                               \
93     # If this is a gpfs file system stanza, skip it.  \
94     $3 == "gpfs" { next }                             \
95     # All other lines are passed through as is.       \
96     { print $0 >> "'$outfile'" }                      \
97  ' $etcFilesystems
98  checkForErrors "removeAllStanzas:awk" $?
99
100  return 0
101
102}  #------------- end of function removeAllStanzas ----------------
103
104
105####################################################################
106#
107# Function:  Remove a file system from /etc/fstab.
108#
109# Input:     $1 - fully qualified file system device name
110#
111# Output:    /etc/fstab is rewritten.
112#
113# Returns:   0 - processing completed successfully
114#            1 - unexpected error
115#
116####################################################################
117function removeStanza  # <deviceName>
118{
119  typeset sourceFile="mmsdrfsdef.Linux.sh"
120  [[ -n $DEBUG || -n $DEBUGremoveStanza ]] && set -x
121  $mmTRACE_ENTER "$*"
122  typeset fqDeviceName=$1
123
124  typeset rc
125
126  $rm -f $newstanza
127
128  #---------------------------------------------------------
129  # Linux file system stanzas consist of 6 fields.
130  # The first field is the fully qualified device name.
131  #---------------------------------------------------------
132  $awk '                                                    \
133     # If this is the stanza to be removed, skip the line.  \
134     $1 == "'$fqDeviceName'" && $3 == "gpfs" { next }       \
135     # All other lines are passed through as is.            \
136     { print $0 >> "'$newstanza'" }                         \
137  ' $etcFilesystems
138  checkForErrors "removeStanza:awk" $?
139
140  # If newstanza is missing or empty, something must have gone very wrong.
141  [[ ! -s $newstanza ]] && \
142    checkForErrors "removeStanza: missing or empty $newstanza file" 1
143
144  # Replace /etc/fstab with its new version.
145  $cp $newstanza $etcFilesystems
146  rc=$?
147  $mmsync $etcFilesystems
148  checkForErrors "cp $newstanza $etcFilesystems" $rc
149
150  return 0
151
152}  #------------- end of function removeStanza ----------------
153
154
155####################################################################
156#
157# Function:  Create a list of the gpfs file systems currently
158#            defined in /etc/fstab.  Make the list look like
159#            the output of the AIX lsfs -c command, i.e.,
160#
161#  #MountPoint:Device:Vfs:Nodename:Type:Size:Options:AutoMount:Acct
162#  /gpfs/gpfsA:/dev/gpfsA:mmfs:-:mmfs:0:rw:no:no
163#  /gpfs/gpfsB:/dev/gpfsB:mmfs:-:mmfs:0:rw:no:no
164#
165# Input:     $1 - output file name
166#
167# Output:    None
168#
169# Returns:   0 - processing completed successfully
170#
171####################################################################
172function getCurrentStanzaList  # <outputFile>
173{
174  typeset sourceFile="mmsdrfsdef.Linux.sh"
175  [[ -n $DEBUG || -n $DEBUGgetCurrentStanzaList ]] && set -x
176  $mmTRACE_ENTER "$*"
177  typeset outfile=$1
178
179  $rm -f $outfile
180
181  #---------------------------------------------------------------
182  # Linux file system stanzas consist of 6 fields.  The first
183  # three fields are fs_spec (device name), fs_file (mount point)
184  # and fs_vfstype ('gpfs' for us).
185  #---------------------------------------------------------------
186  print -- "#MountPoint:Device:Vfs:junk" >$outfile
187  $awk '                                                     \
188     # If this is a gpfs file system stanza,                 \
189     # write its device name and mount point to the file.    \
190     $3 == "gpfs" { print $2":"$1":mmfs:" >> "'$outfile'" }  \
191     # Skip all other lines                                  \
192     { next }                                                \
193  ' $etcFilesystems
194  checkForErrors "getCurrentStanzaList:awk" $?
195
196  return 0
197
198}  #------------- end of function getCurrentStanzaList ----------------
199
200
201#############################################################################
202#
203# Function:  Create the device and mountpoint for a file system
204#
205# Input:     $1 - fully qualified device name
206#            $2 - mount point to be created
207#            $3 - major number for the /dev entry
208#            $4 - minor number for the /dev entry
209#            $5 - mount type (automount or not)
210#            $6 - automount directory
211#
212# Output:    None
213#
214# Returns:   Zero if successful, non-zero otherwise.
215#
216#############################################################################
217function createMountPoint  # <device> <mountpnt> <majorNumber> <minorNumber>
218                           #   <mountType> <automountDir>
219{
220  typeset sourceFile="mmsdrfsdef.Linux.sh"
221  [[ -n $DEBUG || -n $DEBUGcreateMountPoint ]] && set -x
222  $mmTRACE_ENTER "$*"
223  typeset fqDeviceName=$1
224  typeset mountPoint=$2
225  typeset majorNumber=$3
226  typeset minorNumber=$4
227  typeset mountType=$5
228  typeset automountDir=$6
229
230
231  typeset stillMounted existingMajorNumber mkdirError deviceName
232  typeset mountPointParentDir mountPointExists
233  typeset devType='b'
234
235
236  # Strip away the /dev/ prefix from the device name.
237  deviceName=${fqDeviceName##+(/)dev+(/)}
238
239  # Ensure the device name exists and has the correct major number.
240  existingMajorNumber=$(LC_ALL=C $ls -l $fqDeviceName 2>/dev/null | \
241                                 $awk ' { print $5 } ' )
242  existingMajorNumber=${existingMajorNumber%,*}
243
244  if [[ $existingMajorNumber -ne $majorNumber ]]
245  then
246    # If the major number is not the same as the caller wants it to be,
247    # remove the currently existing /dev entry, if any, and recreate it
248    # with the correct major and minor numbers.
249    [[ -n $existingMajorNumber ]] && $rm -f $fqDeviceName
250    createDevEntry $fqDeviceName $majorNumber $minorNumber
251    checkForErrors "createDevEntry $fqDeviceName $majorNumber $minorNumber" $?
252  fi
253
254  # Note that if the file system still shows as mounted, which can
255  # happen after a previous gpfs invocation ends abnormally, the
256  # normal check for existence can not be used - it fails with ESTALE.
257  # In this case though, we can safely assume that the mount point
258  # still exists.
259  stillMounted=$($mount -t gpfs | \
260      $awk '{ if ($1 == "'"$fqDeviceName"'") print $1 }')
261
262  [[ -n $stillMounted ]] && return 0
263
264
265  # If the file system is not mounted, ensure the mount
266  # point is present.
267  if [[ $mountType = automount ]]
268  then
269    # The mount point must be a symlink.
270    if [[ -L $mountPoint ]]
271    then
272      # This is indeed a symlink.  Verify the target is correct.
273      linkTarget=$(LC_ALL=C $ls -l $mountPoint 2>/dev/null)
274      linkTarget=${linkTarget##*$BLANKchar}
275      if [[ $linkTarget = ${automountDir}/${deviceName} ]]
276      then
277        # The link looks good.
278        mountPointExists=yes
279      else
280        # The link needs to be rebuild.
281        $rm -f $mountPoint
282      fi
283    else
284      # This is not a symlink.  If a directory exists, remove
285      # it so that a link can be created in its place.  If it
286      # some other object, we do not know what to do.
287      if [[ -e $mountPoint ]]
288      then
289        $rmdir $mountPoint
290        if [[ $? -ne 0 ]]
291        then
292          print -u2 "$mmcmd: Unable to create symlink $mountPoint"
293          return 1
294        fi
295      fi  # end of if [[ -e $mountPoint ]]
296    fi  # end of if [[ -L $mountPoint ]]
297
298  else
299    # The mount point must be a directory.
300    if [[ -L $mountPoint ]]
301    then
302      # This is a symlink (presumably from a file system that
303      # used to have the automount mount attribute specified).
304      # Remove the link so that we can create a directory in its place.
305      $rm -f $mountPoint
306    elif [[ -e $mountPoint ]]
307    then
308      # Things look good.
309      mountPointExists=yes
310    else
311      : # Nothing found; we need to create a mount point.
312    fi  # end of if [[ -L $mountPoint ]]
313  fi  # end of if [[ $mountType = automount ]]
314
315  # If missing, recreate the mount point.
316  if [[ -z $mountPointExists ]]
317  then
318    if [[ $mountType = automount ]]
319    then
320      mountPointParentDir=$(dirname $mountPoint)
321      mkdirError=$(LC_ALL=C $mkdir -p $mountPointParentDir 2>&1)
322      [[ -n $mkdirError ]] && \
323        print -- $mkdirError | $grep -v "File exists" 1>&2
324      $ln -s ${automountDir}/${deviceName} $mountPoint
325    else
326      mkdirError=$(LC_ALL=C $mkdir -m 0755 -p $mountPoint 2>&1)
327      [[ -n $mkdirError ]] && \
328        print -- $mkdirError | $grep -v "File exists" 1>&2
329    fi
330  fi  # end of if [[ -z $mountPointExists ]]
331
332  return 0
333
334}  #------------- end of function createMountPoint ---------------
335
336
337###############################################################
338#
339# Function:  Determine the major number needed for proper
340#            fs operations and the major number currently
341#            assigned to /dev entries.  Assign the two values
342#            to the appropriate global variables.
343#
344# Input:     None
345#
346# Output:    None
347#
348# Returns:   Always zero.
349#
350###############################################################
351function checkVfsNumber
352{
353  typeset sourceFile="mmsdrfsdef.Linux.sh"
354  [[ -n $DEBUG || -n $DEBUGcheckVfsNumber ]] && set -x
355  $mmTRACE_ENTER "$*"
356
357  typeset device deviceList majorNumber
358
359
360  # Determine the major number that is presently required.
361  # This is required for kernel version 2.4 and earlier.
362  # If the current kernel is 2.5 or later, use the default
363  # values since the major number is largely irrelevant.
364  [[ -z $version24 ]] && return 0
365
366  # If the daemon is running, the major number should be the one that
367  # was assigned by the kernel when the mmfs extension was loaded.
368  # Otherwise, use the default number.
369  neededMajorNumber=$($awk ' $2=="gpfs" {print $1} ' /proc/devices)
370  [[ -z $neededMajorNumber ]] && \
371    neededMajorNumber=$defaultMajorNumber
372
373  # Determine the major number that has been used last, i.e.,
374  # determine the major number of the existing /dev entries.
375
376  # If file mmfsVfsNumber* exists, its suffix is the major number.
377  majorNumber=$($ls ${mmfsVfsNumber}+([0-9]) 2>/dev/null)
378  majorNumber=${majorNumber#$mmfsVfsNumber}
379  if [[ -n $majorNumber ]]
380  then
381    currentMajorNumber=$majorNumber
382    return 0
383  fi
384
385  # If the file has been lost somehow, create a list
386  # of the file systems in the cluster and see what
387  # major number is being used for their /dev entries.
388
389  # Create a list of the file systems in the cluster.
390  deviceList=$($grep -e ":$SG_HEADR:" $mmsdrfsFile |  \
391               $GETVALUE $DEV_NAME_Field)
392
393  # Go down the list of file systems until you find a corresponding
394  # /dev entry from which to get the major number.
395  for device in $deviceList
396  do
397    majorNumber=$(LC_ALL=C $ls -l /dev/$device 2>/dev/null | \
398                           $awk ' { print $5 } ' )
399    majorNumber=${majorNumber%,*}
400    [[ -n $majorNumber ]] && break
401  done
402
403  # If there are no file systems in this nodeset, or if all
404  # file systems are missing their /dev entries for some reason,
405  # assume the default major device number.
406  [[ -z $majorNumber ]] && majorNumber=$defaultMajorNumber
407
408  $touch ${mmfsVfsNumber}${majorNumber} 2>/dev/null
409  currentMajorNumber=$majorNumber
410  return 0
411
412}  #------------- end of function checkVfsNumber ----------------
413
414
415######################################################################
416#
417# Function:  Make sure there is an entry for mmfs in /etc/auto_master
418#
419# Input:     None
420#
421# Output:    None
422#
423# Returns:   0 - mmfs entry in /etc/auto_master confirmed.
424#
425######################################################################
426function checkAutomountDefine
427{
428  typeset sourceFile="mmsdrfsdef.Linux.sh"
429  [[ -n $DEBUG || -n $DEBUGcheckAutomountDefine ]] && set -x
430  $mmTRACE_ENTER "$*"
431
432  # Applies only to the AIX environment.
433
434  return 0
435
436} #-------- end of function checkAutomountDefine ----------------
437
438
439######################################################################
440#
441# Function:  Remove the entry for mmfs from /etc/auto_master
442#
443# Input:     None
444#
445# Output:    None
446#
447# Returns:   0 - mmfs entry in /etc/auto_master removed.
448#
449######################################################################
450function clearAutomountDefine
451{
452  typeset sourceFile="mmsdrfsdef.Linux.sh"
453  [[ -n $DEBUG || -n $DEBUGclearAutomountDefine ]] && set -x
454  $mmTRACE_ENTER "$*"
455
456  # Applies only to the AIX environment.
457
458  return 0
459
460} #-------- end of function clearAutomountDefine ----------------
461
462
463########################################################################
464#
465# Function:  Obtain K5 (DCE) and/or K4 credentials.
466#            Applies only to the SP environment.
467#
468# Input:     None
469#
470# Output:    None
471#
472# Returns:   0 - command completed successfully
473#
474########################################################################
475function getCred
476{
477  typeset sourceFile="mmsdrfsdef.Linux.sh"
478  [[ -n $DEBUG || -n $DEBUGgetCred ]] && set -x
479  # $mmTRACE_ENTER "$*"
480
481  return 0
482
483}  #---------------- end of function getCred ---------------------------
484
485
486#############################################################################
487#
488# Function:  Destroy K5 (DCE) and/or K4 credentials obtained by this command
489#            Applies only to the SP environment.
490#
491# Input:     None
492#
493# Output:    None
494#
495# Returns:   0 - command completed successfully
496#
497#############################################################################
498function freeCred
499{
500  typeset sourceFile="mmsdrfsdef.Linux.sh"
501  [[ -n $DEBUG || -n $DEBUGfreeCred ]] && set -x
502  # $mmTRACE_ENTER "$*"
503
504  getCredCalled=no
505  return 0
506
507}  #---------------- end of function freeCred ---------------
508
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