3 # $Id: 068,v 1.4 2002/09/04 10:58:49 fsgqa Exp $
5 # Test Linux LVM snapshot creation
7 # The timing and placement of kills and waits is particularily sensitive.
8 # Don't change them unless you want to spend some time getting it right again.
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43 owner=freemyer@NorcrossGroup.com
46 echo "QA output created by $seq"
51 status=1 # failure is the default!
53 # Either "dd" or "fsstress" can be used to generate io load.
54 # Setting both to "FALSE" tests with no io load.
55 GENERATE_IO_LOAD_VIA_DD=TRUE
56 GENERATE_IO_LOAD_VIA_FSSTRESS=TRUE
57 DELAY_BETWEEN_ITERATIONS=10
62 SCRATCH_SNAP_MNT="$tmp/scratch_snap"
64 # Only needed if running by hand, ie. check sets these
65 #SCRATCH_LVM_DEV=/dev/xxxx
70 echo Cleanup beginning
73 xfs_freeze -u "$SCRATCH_MNT"
75 sleep 10 # Give the dd loop time to finish
77 # Comment out unless needed.
78 # If needed, wrap with logic to ensure the FS is mounted.
79 # Kill off any other possible stray stragglers that may be out there.
80 # There should not be any.
81 #fuser -k -m "$SCRATCH_SNAP_MNT/dummy" >/dev/null 2>&1
82 #fuser -k -m "$SCRATCH_MNT/dummy" >/dev/null 2>&1
86 umount "$SCRATCH_SNAP_MNT" > /dev/null 2>&1
87 rmdir "$SCRATCH_SNAP_MNT" > /dev/null 2>&1
88 umount "$SCRATCH_MNT" > /dev/null 2>&1
90 lvremove -f "$VG/scratch_snap" > /dev/null 2>&1
91 lvremove -f "$VG/scratch" > /dev/null 2>&1
95 rm -rf "$tmp" # if we ever use tmp files
100 trap "_cleanup" 0 1 2 3 15
103 # get standard environment, filters and checks
107 if [ -e "$SCRATCH_SNAP_MNT" ]; then
108 rmdir "$SCRATCH_SNAP_MNT" || _notrun "Cannot rmdir $SCRATCH_SNAP_MNT"
110 mkdir "$SCRATCH_SNAP_MNT"
112 #Verify we have the lvm user tools
113 [ -x /sbin/lvcreate ] || _notrun "lvcreate utility is not installed in /sbin"
114 [ -x /sbin/lvremove ] || _notrun "lvremove utility is not installed in /sbin"
116 # If the above fails for LVM 2, the below may be useful notes
117 # try "lvm vgdisplay --version" and look for a > 1.9x version number, eg,
119 # LVM version: 1.95.10-cvs (2002-05-31)
120 # Library version: 0.96.03-ioctl-cvs (2002-06-27)
121 # Driver version: 1.0.3
126 # Check if LVM 1 is in the kernel
127 if grep lvm /proc/devices > /dev/null; then LVM=true; fi
129 # Check if LVM 2 is in the kernel
130 if grep device-mapper /proc/devices > /dev/null; then LVM=true; fi
132 # Check if EVMS is in the kernel
133 #TODO # I don't know how to do this one.
135 [ "$LVM" = false ] && _notrun "LVM is not present in the running kernel."
138 # real QA test starts here
140 # Create a PV set from the scratch partition
141 #TODO # (I don't know if this is needed.and it is dangerous because it intentionally deletes the partition table!!!
142 #TODO # dd if=/dev/zero of="$SCRATCH_LVM_DEV" bs=512 count=1
143 #TODO # pvcreate "$SCRATCH_LVM_DEV"
145 # Create a VG from the PV
146 #TODO # vgcreate "$VG" "$SCRATCH_LVM_DEV"
148 # Create a LV in the VG to snapshot
149 #TODO # lvcreate -L 2G -n scratch "$VG"
154 mount "$VG/scratch" "$SCRATCH_MNT"
158 if [ "$GENERATE_IO_LOAD_VIA_DD" != FALSE ]
160 # Create a large 64 Meg zero filled file on the LV
161 dd if=/dev/zero of=$SCRATCH_MNT/dummy bs=64k count=1000 >/dev/null 2>&1
163 # Setup infinite loop copying the large file, thus generating heavy I/O
165 while [ -f "$tmp/running" ]
167 dd if="$SCRATCH_MNT/dummy" of="$SCRATCH_MNT/junk" bs=64k \
169 # This forces metadata updates the next time around
170 rm "$SCRATCH_MNT/junk"
175 if [ "$GENERATE_IO_LOAD_VIA_FSSTRESS" != FALSE ]
177 STRESS_DIR="$SCRATCH_MNT/fsstress_test_dir"
180 while [ -f "$tmp/running" ]
182 # -n 10 makes this take about 10 seconds,
183 # This allows the loop to end shortly after $tmp/running
185 $here/src/fsstress -d "$STRESS_DIR" -n 10 > /dev/null 2>&1
194 while [ $ii -le "$ITERATIONS" ]
197 # Useful if running interactively, but not from the xfs test scripts
200 # If the VFS lock patch is present, the calls to xfs_freeze
201 # are redundant, but should cause no problems
203 xfs_freeze -f "$SCRATCH_MNT"
204 [ $? != 0 ] && echo xfs_freeze -f "$SCRATCH_MNT" failed
206 lvcreate --snapshot --size 1G --name scratch_snap "$VG/scratch"\
210 echo "Snapshot $SCRATCH_MNT create failed, status=$ret"
212 SNAPSHOT_shell_pid=$!
214 # If the Snapshot has not completed in ten minutes, kill it
216 # I have NOT figured out how to kill the sleep 600 before
217 # it exits naturally.
218 # This does not cause a problem, but it clutters the ps table.
221 # The kill $TIMEOUT_shell_pid keeps the below from occuring
222 echo Snapshot Lockup Occured on loop $ii
223 xfs_freeze -u "$SCRATCH_MNT"
228 wait "$SNAPSHOT_shell_pid"
230 exec 2> /dev/null # Send the shells stderr to /dev/null
231 kill "$TIMEOUT_shell_pid" # Cancel the timeout
232 wait "$TIMEOUT_shell_pid" # This causes consistent shell
233 # notification for some unknown reason
234 exec 2>&1 # Put it back to the same as stdout
236 # If the VFS lock patch is present, the calls to xfs_freeze
237 # are redundant, but should cause no problems
239 xfs_freeze -u "$SCRATCH_MNT"
240 [ $? != 0 ] && echo xfs_freeze -u "$SCRATCH_MNT" failed
243 mount -t xfs -o ro,nouuid "$VG/scratch_snap" "$SCRATCH_SNAP_MNT"
244 [ $? -eq 0 ] || echo mount for "$SCRATCH_SNAP_MNT" failed
246 umount "$SCRATCH_SNAP_MNT"
247 [ $? -eq 0 ] || echo umount for "$SCRATCH_SNAP_MNT" failed
249 lvremove -f "$VG/scratch_snap" > /dev/null 2>&1
250 [ $? -eq 0 ] || echo lvremove for "$VG/scratch_snap" failed
254 sleep "$DELAY_BETWEEN_ITERATIONS"
255 # The VG seems to need time to stabalize between snapshots
256 # With LVM 1.0.3 and XFS 1.1, I have tried this at 3600 seconds
257 # and still had failures
262 echo SUCCESS, COMPLETED ALL ITERATIONS WITH NO TIME OUTS!!!!!!!!!!!!
265 exit 1 # _cleanup should exit, so we should never get here.