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btrfs: make inodes hold a ref on their roots

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If we make sure all the inodes have refs on their root we don't have to
worry about the root disappearing while we have open inodes.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik
2020-02-14 16:11:43 -05:00
committed by David Sterba
parent 8c38938c7b
commit 5c8fd99fec
2 changed files with 6 additions and 4 deletions
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2
fs/btrfs/disk-io.c
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@@ -2096,7 +2096,7 @@ static void btrfs_init_btree_inode(struct btrfs_fs_info *fs_info)
BTRFS_I(inode)->io_tree.ops = &btree_extent_io_ops;
BTRFS_I(inode)->root = fs_info->tree_root;
BTRFS_I(inode)->root = btrfs_grab_root(fs_info->tree_root);
memset(&BTRFS_I(inode)->location, 0, sizeof(struct btrfs_key));
set_bit(BTRFS_INODE_DUMMY, &BTRFS_I(inode)->runtime_flags);
btrfs_insert_inode_hash(inode);