Btrfs: add free space tree mount option

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Now we can finally hook up everything so we can actually use free space
tree. The free space tree is enabled by passing the space_cache=v2 mount
option. On the first mount with the this option set, the free space tree
will be created and the FREE_SPACE_TREE read-only compat bit will be
set. Any time the filesystem is mounted from then on, we must use the
free space tree. The clear_cache option will also clear the free space
tree.

Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>

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Omar Sandoval 2015-09-29 20:50:38 -07:00 • committed by Chris Mason

parent 1e144fb8f4

commit 70f6d82ec7

3 changed files with 88 additions and 10 deletions

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7

fs/btrfs/ctree.h

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38

fs/btrfs/disk-io.c

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53

fs/btrfs/super.c

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