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Btrfs: do not reuse objectid of deleted snapshot/subvol

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The new back reference format does not allow reusing objectid of
deleted snapshot/subvol. So we use ++highest_objectid to allocate
objectid for new snapshot/subvol.

Now we use ++highest_objectid to allocate objectid for both new inode
and new snapshot/subvolume, so this patch removes 'find hole' code in
btrfs_find_free_objectid.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Yan, Zheng
2009-09-21 15:56:00 -04:00
committed by Chris Mason
parent 1c4850e21d
commit 13a8a7c8c4
6 changed files with 31 additions and 116 deletions
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4
fs/btrfs/ctree.h
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@@ -1007,8 +1007,8 @@ struct btrfs_root {
u32 stripesize;
u32 type;
u64 highest_inode;
u64 last_inode_alloc;
u64 highest_objectid;
int ref_cows;
int track_dirty;
u64 defrag_trans_start;