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btrfs: move maximum limits to btrfs_tree.h

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We have maximum link and name length limits, move these to btrfs_tree.h
as they're on disk limitations.

Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ reformat comments ]
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2022-09-14 11:06:30 -04:00 committed by David Sterba
parent 51129b33d3
commit ad4b63caf5
2 changed files with 12 additions and 13 deletions
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13
fs/btrfs/ctree.h
View File

@ -68,19 +68,6 @@ struct reloc_control;
#define BTRFS_OLDEST_GENERATION 0ULL
/*
* we can actually store much bigger names, but lets not confuse the rest
* of linux
*/
#define BTRFS_NAME_LEN 255
/*
* Theoretical limit is larger, but we keep this down to a sane
* value. That should limit greatly the possibility of collisions on
* inode ref items.
*/
#define BTRFS_LINK_MAX 65535U
#define BTRFS_EMPTY_DIR_SIZE 0
#define BTRFS_DIRTY_METADATA_THRESH SZ_32M

12
include/uapi/linux/btrfs_tree.h
View File

@ -15,6 +15,18 @@
#define BTRFS_MAX_LEVEL 8
/*
* We can actually store much bigger names, but lets not confuse the rest of
* linux.
*/
#define BTRFS_NAME_LEN 255
/*
* Theoretical limit is larger, but we keep this down to a sane value. That
* should limit greatly the possibility of collisions on inode ref items.
*/
#define BTRFS_LINK_MAX 65535U
/*
* This header contains the structure definitions and constants used
* by file system objects that can be retrieved using