bcachefs: Initial commit

Initially forked from drivers/md/bcache, bcachefs is a new copy-on-write
filesystem with every feature you could possibly want.

Website: https://bcachefs.org

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

1 files changed, 76 insertions, 0 deletions

diff --git a/fs/bcachefs/quota.h b/fs/bcachefs/quota.h
new file mode 100644
index 000000000000..4a76b49f9e00
--- /dev/null
+++ b/fs/bcachefs/quota.h
@@ -0,0 +1,76 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BCACHEFS_QUOTA_H
+#define _BCACHEFS_QUOTA_H
+
+#include "inode.h"
+#include "quota_types.h"
+
+extern const struct bch_sb_field_ops bch_sb_field_ops_quota;
+
+const char *bch2_quota_invalid(const struct bch_fs *, struct bkey_s_c);
+void bch2_quota_to_text(struct bch_fs *, char *, size_t, struct bkey_s_c);
+
+#define bch2_bkey_quota_ops (struct bkey_ops) {		\
+	.key_invalid	= bch2_quota_invalid,		\
+	.val_to_text	= bch2_quota_to_text,		\
+}
+
+enum quota_acct_mode {
+	BCH_QUOTA_PREALLOC,
+	BCH_QUOTA_WARN,
+	BCH_QUOTA_NOCHECK,
+};
+
+static inline struct bch_qid bch_qid(struct bch_inode_unpacked *u)
+{
+	return (struct bch_qid) {
+		.q[QTYP_USR] = u->bi_uid,
+		.q[QTYP_GRP] = u->bi_gid,
+		.q[QTYP_PRJ] = u->bi_project,
+	};
+}
+
+static inline unsigned enabled_qtypes(struct bch_fs *c)
+{
+	return ((c->opts.usrquota << QTYP_USR)|
+		(c->opts.grpquota << QTYP_GRP)|
+		(c->opts.prjquota << QTYP_PRJ));
+}
+
+#ifdef CONFIG_BCACHEFS_QUOTA
+
+int bch2_quota_acct(struct bch_fs *, struct bch_qid, enum quota_counters,
+		    s64, enum quota_acct_mode);
+
+int bch2_quota_transfer(struct bch_fs *, unsigned, struct bch_qid,
+			struct bch_qid, u64);
+
+void bch2_fs_quota_exit(struct bch_fs *);
+void bch2_fs_quota_init(struct bch_fs *);
+int bch2_fs_quota_read(struct bch_fs *);
+
+extern const struct quotactl_ops bch2_quotactl_operations;
+
+#else
+
+static inline int bch2_quota_acct(struct bch_fs *c, struct bch_qid qid,
+				  enum quota_counters counter, s64 v,
+				  enum quota_acct_mode mode)
+{
+	return 0;
+}
+
+static inline int bch2_quota_transfer(struct bch_fs *c, unsigned qtypes,
+				      struct bch_qid dst,
+				      struct bch_qid src, u64 space)
+{
+	return 0;
+}
+
+static inline void bch2_fs_quota_exit(struct bch_fs *c) {}
+static inline void bch2_fs_quota_init(struct bch_fs *c) {}
+static inline int bch2_fs_quota_read(struct bch_fs *c) { return 0; }
+
+#endif
+
+#endif /* _BCACHEFS_QUOTA_H */