Update bcachefs sources to 95ff72a6c1 fixup! mm: Centralize & improve oom reporting...

[bcachefs-tools-debian] / libbcachefs / inode.c

diff --git a/libbcachefs/inode.c b/libbcachefs/inode.c
index 88d83d91546a9c3a7872aa067137512ac9161033..6a2b94908371e230c69f3cc4a6d65760248e00c6 100644 (file)
--- a/libbcachefs/inode.c
+++ b/libbcachefs/inode.c
@@ -736,3 +736,36 @@ int bch2_inode_find_by_inum(struct bch_fs *c, subvol_inum inum,
        return bch2_trans_do(c, NULL, NULL, 0,
                bch2_inode_find_by_inum_trans(&trans, inum, inode));
 }
+
+int bch2_inode_nlink_inc(struct bch_inode_unpacked *bi)
+{
+       if (bi->bi_flags & BCH_INODE_UNLINKED)
+               bi->bi_flags &= ~BCH_INODE_UNLINKED;
+       else {
+               if (bi->bi_nlink == U32_MAX)
+                       return -EINVAL;
+
+               bi->bi_nlink++;
+       }
+
+       return 0;
+}
+
+void bch2_inode_nlink_dec(struct btree_trans *trans, struct bch_inode_unpacked *bi)
+{
+       if (bi->bi_nlink && (bi->bi_flags & BCH_INODE_UNLINKED)) {
+               bch2_trans_inconsistent(trans, "inode %llu unlinked but link count nonzero",
+                                       bi->bi_inum);
+               return;
+       }
+
+       if (bi->bi_flags & BCH_INODE_UNLINKED) {
+               bch2_trans_inconsistent(trans, "inode %llu link count underflow", bi->bi_inum);
+               return;
+       }
+
+       if (bi->bi_nlink)
+               bi->bi_nlink--;
+       else
+               bi->bi_flags |= BCH_INODE_UNLINKED;
+}