Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / ceph / mdsmap.h

diff --git a/kernel/include/linux/ceph/mdsmap.h b/kernel/include/linux/ceph/mdsmap.h
new file mode 100644 (file)
index 0000000..87ed09f
--- /dev/null
+++ b/kernel/include/linux/ceph/mdsmap.h
@@ -0,0 +1,63 @@
+#ifndef _FS_CEPH_MDSMAP_H
+#define _FS_CEPH_MDSMAP_H
+
+#include <linux/bug.h>
+#include <linux/ceph/types.h>
+
+/*
+ * mds map - describe servers in the mds cluster.
+ *
+ * we limit fields to those the client actually xcares about
+ */
+struct ceph_mds_info {
+       u64 global_id;
+       struct ceph_entity_addr addr;
+       s32 state;
+       int num_export_targets;
+       bool laggy;
+       u32 *export_targets;
+};
+
+struct ceph_mdsmap {
+       u32 m_epoch, m_client_epoch, m_last_failure;
+       u32 m_root;
+       u32 m_session_timeout;          /* seconds */
+       u32 m_session_autoclose;        /* seconds */
+       u64 m_max_file_size;
+       u32 m_max_mds;                  /* size of m_addr, m_state arrays */
+       struct ceph_mds_info *m_info;
+
+       /* which object pools file data can be stored in */
+       int m_num_data_pg_pools;
+       u64 *m_data_pg_pools;
+       u64 m_cas_pg_pool;
+};
+
+static inline struct ceph_entity_addr *
+ceph_mdsmap_get_addr(struct ceph_mdsmap *m, int w)
+{
+       if (w >= m->m_max_mds)
+               return NULL;
+       return &m->m_info[w].addr;
+}
+
+static inline int ceph_mdsmap_get_state(struct ceph_mdsmap *m, int w)
+{
+       BUG_ON(w < 0);
+       if (w >= m->m_max_mds)
+               return CEPH_MDS_STATE_DNE;
+       return m->m_info[w].state;
+}
+
+static inline bool ceph_mdsmap_is_laggy(struct ceph_mdsmap *m, int w)
+{
+       if (w >= 0 && w < m->m_max_mds)
+               return m->m_info[w].laggy;
+       return false;
+}
+
+extern int ceph_mdsmap_get_random_mds(struct ceph_mdsmap *m);
+extern struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end);
+extern void ceph_mdsmap_destroy(struct ceph_mdsmap *m);
+
+#endif