xfstests: add 267 and 268 for multiple media files

This patch adds a couple of tests for xfsdump when multiple media files
are used. 267 tests the case where a file is split across multiple media
files, and 268 tests the case where a file ends on one media file and
the next media file starts on another file. These tests use a small
media file size (xfsdump -d) so that they don't rely on having to hit
end-of-tape.

Signed-off-by: Bill Kendall <wkendall@sgi.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

267.out

@@ -0,0 +1,88 @@
+QA output created by 267
+Put scsi tape driver into variable block size mode
+Creating directory system to dump using src/fill.
+Setup Attribute "attr1" set to a 10 byte value for biggg:
+some_text1
+.
+Erasing tape
+Dumping to tape...
+xfsdump  -d12 -f TAPE_DEV -M stress_tape_media -L stress_267 SCRATCH_MNT
+xfsdump: using scsi tape (drive_scsitape) strategy
+xfsdump: level 0 dump of HOSTNAME:SCRATCH_MNT
+xfsdump: dump date: DATE
+xfsdump: session id: ID
+xfsdump: session label: "stress_267"
+xfsdump: ino map <PHASES>
+xfsdump: ino map construction complete
+xfsdump: estimated dump size: NUM bytes
+xfsdump: /var/xfsdump/inventory created
+xfsdump: preparing drive
+xfsdump: creating dump session media file 0 (media 0, file 0)
+xfsdump: dumping ino map
+xfsdump: dumping directories
+xfsdump: dumping non-directory files
+xfsdump: ending media file
+xfsdump: media file size NUM bytes
+xfsdump: creating dump session media file 1 (media 0, file 1)
+xfsdump: dumping ino map
+xfsdump: dumping directories
+xfsdump: dumping non-directory files
+xfsdump: ending media file
+xfsdump: media file size NUM bytes
+xfsdump: creating dump session media file 2 (media 0, file 2)
+xfsdump: dumping ino map
+xfsdump: dumping directories
+xfsdump: dumping non-directory files
+xfsdump: ending media file
+xfsdump: media file size NUM bytes
+xfsdump: dumping session inventory
+xfsdump: beginning inventory media file
+xfsdump: media file 3 (media 0, file 3)
+xfsdump: ending inventory media file
+xfsdump: inventory media file size NUM bytes
+xfsdump: writing stream terminator
+xfsdump: beginning media stream terminator
+xfsdump: media file 4 (media 0, file 4)
+xfsdump: ending media stream terminator
+xfsdump: media stream terminator size BLOCKSZ bytes
+xfsdump: dump size (non-dir files) : NUM bytes
+xfsdump: dump complete: SECS seconds elapsed
+xfsdump: Dump Status: SUCCESS
+Rewinding tape
+Restoring from tape...
+xfsrestore  -f TAPE_DEV  -L stress_267 RESTORE_DIR
+xfsrestore: using scsi tape (drive_scsitape) strategy
+xfsrestore: using online session inventory
+xfsrestore: searching media for directory dump
+xfsrestore: preparing drive
+xfsrestore: examining media file 0
+xfsrestore: reading directories
+xfsrestore: 2 directories and 2 entries processed
+xfsrestore: directory post-processing
+xfsrestore: restoring non-directory files
+xfsrestore: examining media file 1
+xfsrestore: seeking past media file directory dump
+xfsrestore: restoring non-directory files
+xfsrestore: examining media file 2
+xfsrestore: seeking past media file directory dump
+xfsrestore: restoring non-directory files
+xfsrestore: restore complete: SECS seconds elapsed
+xfsrestore: Restore Status: SUCCESS
+Comparing listing of dump directory with restore directory
+Files TMP.dump_dir and TMP.restore_dir are identical
+Comparing dump directory with restore directory
+Files DUMP_DIR/biggg and RESTORE_DIR/DUMP_SUBDIR/biggg are identical
+Only in SCRATCH_MNT: RESTORE_SUBDIR
+Comparing dump directory with restore directory
+Looking at the extended attributes (EAs)
+EAs on dump
+User names
+Root names
+Attribute "attr1" had a 10 byte value for DUMP_DIR/biggg:
+some_text1
+EAs on restore
+User names
+Root names
+Attribute "attr1" had a 10 byte value for DUMP_DIR/biggg:
+some_text1
+Files 267.ea1 and 267.ea2 are identical