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Added SCRATCH_DEV_POOL to specify multiple disks for the btrfs RAID

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SCRATCH_DEV takes single disk as the scratch place for testing. New
SCRATCH_DEV_POOL can used to specify multiple disks for the scratch
btrfs filesystem.

Using SCRATCH_DEV and or SCRATCH_DEV_POOL will follow the following logic.
  btrfs FS OR any FS
    SCRATCH_DEV_POOL is unset and SCRATCH_DEV is set
     . test-case with _require_scratch_dev_pool will not run
     . test-case without _require_scratch_dev_pool will run

    SCRATCH_DEV_POOL is set and SCRATCH_DEV is unset
     . test-case with _require_scratch_dev_pool
         - runs only if FSTYP=btrfs
     . test-case without _require_scratch_dev_pool will run using first
       dev in the SCRATCH_DEV_POOL as a SCRATCH_DEV
         - if FSTYP=btrfs it includes SCRATCH_DEV_POOL disks to the FS
         - if FSTYP=non-btrfs SCRATCH_DEV_POOL is ignored

    SCRATCH_DEV_POOL is set and SCRATCH_DEV is set
     . reports error in the config

    SCRATCH_DEV_POOL is unset and SCRATCH_DEV is unset
     . no change

Signed-off-by: Anand Jain <Anand.Jain@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Anand Jain
2011-10-20 23:41:19 +08:00
committed by Christoph Hellwig
parent 2ef3d4e4c6
commit 27a067a7ca
3 changed files with 98 additions and 5 deletions
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README
+12 -4
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@@ -34,14 +34,22 @@ Preparing system for tests (IRIX and Linux):
- leave empty and expect this partition to be clobbered
by some tests. If this is not provided, many tests will
not be run.
(these must be two DIFFERENT partitions)
(SCRATCH and TEST must be two DIFFERENT partitions)
OR
- for btrfs only: some btrfs test cases will need 3 or more independent
SCRATCH disks which should be set using SCRATCH_DEV_POOL (for eg:
SCRATCH_DEV_POOL="/dev/sda /dev/sdb /dev/sdc") with which
SCRATCH_DEV should be unused by the tester, and for the legacy
support SCRATCH_DEV will be set to the first disk of the
SCRATCH_DEV_POOL by xfstests script.
- setup your environment
- setenv TEST_DEV "device containing TEST PARTITION"
- setenv TEST_DIR "mount point of TEST PARTITION"
- optionally:
- setenv SCRATCH_DEV "device containing SCRATCH PARTITION"
- setenv SCRATCH_DEV "device containing SCRATCH PARTITION" OR
(btrfs only) setenv SCRATCH_DEV_POOL "to 3 or more SCRATCH disks for
testing btrfs raid concepts"
- setenv SCRATCH_MNT "mount point for SCRATCH PARTITION"
- setenv TAPE_DEV "tape device for testing xfsdump"
- setenv RMT_TAPE_DEV "remote tape device for testing xfsdump"
@@ -63,7 +71,7 @@ Preparing system for tests (IRIX and Linux):
tape which can be overwritten.
- make sure $TEST_DEV is a mounted XFS partition
- make sure that $SCRATCH_DEV contains nothing useful
- make sure that $SCRATCH_DEV or $SCRATCH_DEV_POOL contains nothing useful
Running tests: