Btrfs: add support for compat flags to btrfs

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This adds the necessary disk format for handling compatibility flags
in the future to handle disk format changes.  We have a compat_flags,
compat_ro_flags and incompat_flags set for the super block.  Compat
flags will be to hold the features that are compatible with older
versions of btrfs, compat_ro flags have features that are compatible
with older versions of btrfs if the fs is mounted read only, and
incompat_flags has features that are incompatible with older versions
of btrfs.  This also axes the compat_flags field for the inode and
just makes the flags field a 64bit field, and changes the root item
flags field to 64bit.

Signed-off-by: Josef Bacik <jbacik@redhat.com>

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Josef Bacik 2008-12-02 06:36:08 -05:00 • committed by Chris Mason

parent 7a865e8ac3

commit f2b636e80d

2 changed files with 42 additions and 7 deletions

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28

fs/btrfs/ctree.h

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21

fs/btrfs/disk-io.c

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