Btrfs: Update nodatacow mode to support cloned single files and resizing

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Before, nodatacow only checked to make sure multiple roots didn't have
references on a single extent.  This check makes sure that multiple
inodes don't have references.

nodatacow needed an extra check to see if the block group was currently
readonly.  This way cows forced by the chunk relocation code are honored.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

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This commit is contained in:

Chris Mason 2008-05-08 14:11:56 -04:00

parent bf4ef67924

commit a68d5933a0

3 changed files with 19 additions and 5 deletions

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2

fs/btrfs/ctree.h

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9

fs/btrfs/extent-tree.c

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13

fs/btrfs/inode.c

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