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authorStefan Behrens <sbehrens@giantdisaster.de>2013-08-15 11:11:20 -0400
committerChris Mason <chris.mason@fusionio.com>2013-09-01 08:15:55 -0400
commitdd5f9615fc5c5e8d3751aab3a17b92768fb1ce70 (patch)
tree9b7ad64c2761200e7713ee55e5d667e1b57d0e6b /fs/btrfs/ctree.h
parentf7a81ea4cc6bdb51d8267d2f3ff485f0b4070074 (diff)
Btrfs: maintain subvolume items in the UUID tree
When a new subvolume or snapshot is created, a new UUID item is added to the UUID tree. Such items are removed when the subvolume is deleted. The ioctl to set the received subvolume UUID is also touched and will now also add this received UUID into the UUID tree together with the ID of the subvolume. The latter is also done when read-only snapshots are created which inherit all the send/receive information from the parent subvolume. User mode programs use the BTRFS_IOC_TREE_SEARCH ioctl to search and read in the UUID tree. Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de> Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Diffstat (limited to 'fs/btrfs/ctree.h')
-rw-r--r--fs/btrfs/ctree.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index c03e61ef7230..bdc8498d6f03 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -3724,6 +3724,7 @@ extern const struct dentry_operations btrfs_dentry_operations;
3724long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3724long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3725void btrfs_update_iflags(struct inode *inode); 3725void btrfs_update_iflags(struct inode *inode);
3726void btrfs_inherit_iflags(struct inode *inode, struct inode *dir); 3726void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
3727int btrfs_is_empty_uuid(u8 *uuid);
3727int btrfs_defrag_file(struct inode *inode, struct file *file, 3728int btrfs_defrag_file(struct inode *inode, struct file *file,
3728 struct btrfs_ioctl_defrag_range_args *range, 3729 struct btrfs_ioctl_defrag_range_args *range,
3729 u64 newer_than, unsigned long max_pages); 3730 u64 newer_than, unsigned long max_pages);