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author | Edmund Nadolski <enadolski@suse.com> | 2017-03-16 19:04:33 +0300 |
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committer | David Sterba <dsterba@suse.com> | 2017-04-18 15:07:25 +0300 |
commit | f58d88b336c1c83a35d6b2582d45cd87cb2ca406 (patch) | |
tree | 3bc89980cf89ed7ab8ae4c3a2b49284a2a60d4e8 /fs/btrfs/backref.c | |
parent | f486135ebab4fb91366a1e41fb15ed3036ad0cf9 (diff) | |
download | linux-f58d88b336c1c83a35d6b2582d45cd87cb2ca406.tar.xz |
btrfs: provide enumeration for __merge_refs mode argument
Replace hardcoded numeric values for __merge_refs 'mode' argument
with descriptive constants.
Signed-off-by: Edmund Nadolski <enadolski@suse.com>
Reviewed-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/backref.c')
-rw-r--r-- | fs/btrfs/backref.c | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c index 116338344224..6ce7281749a8 100644 --- a/fs/btrfs/backref.c +++ b/fs/btrfs/backref.c @@ -26,6 +26,11 @@ #include "delayed-ref.h" #include "locking.h" +enum merge_mode { + MERGE_IDENTICAL_KEYS = 1, + MERGE_IDENTICAL_PARENTS, +}; + /* Just an arbitrary number so we can be sure this happened */ #define BACKREF_FOUND_SHARED 6 @@ -809,14 +814,12 @@ static int __add_missing_keys(struct btrfs_fs_info *fs_info, /* * merge backrefs and adjust counts accordingly * - * mode = 1: merge identical keys, if key is set - * FIXME: if we add more keys in __add_prelim_ref, we can merge more here. - * additionally, we could even add a key range for the blocks we - * looked into to merge even more (-> replace unresolved refs by those - * having a parent). - * mode = 2: merge identical parents + * FIXME: For MERGE_IDENTICAL_KEYS, if we add more keys in __add_prelim_ref + * then we can merge more here. Additionally, we could even add a key + * range for the blocks we looked into to merge even more (-> replace + * unresolved refs by those having a parent). */ -static void __merge_refs(struct list_head *head, int mode) +static void __merge_refs(struct list_head *head, enum merge_mode mode) { struct __prelim_ref *pos1; @@ -829,7 +832,7 @@ static void __merge_refs(struct list_head *head, int mode) if (!ref_for_same_block(ref1, ref2)) continue; - if (mode == 1) { + if (mode == MERGE_IDENTICAL_KEYS) { if (!ref1->parent && ref2->parent) swap(ref1, ref2); } else { @@ -1374,7 +1377,7 @@ again: if (ret) goto out; - __merge_refs(&prefs, 1); + __merge_refs(&prefs, MERGE_IDENTICAL_KEYS); ret = __resolve_indirect_refs(fs_info, path, time_seq, &prefs, extent_item_pos, total_refs, @@ -1382,7 +1385,7 @@ again: if (ret) goto out; - __merge_refs(&prefs, 2); + __merge_refs(&prefs, MERGE_IDENTICAL_PARENTS); while (!list_empty(&prefs)) { ref = list_first_entry(&prefs, struct __prelim_ref, list); |