Add the rt linux 4.1.3-rt3 as base

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

diff --git a/kernel/include/linux/ceph/mon_client.h b/kernel/include/linux/ceph/mon_client.h
new file mode 100644 (file)
index 0000000..81810dc
--- /dev/null
+++ b/kernel/include/linux/ceph/mon_client.h
@@ -0,0 +1,119 @@
+#ifndef _FS_CEPH_MON_CLIENT_H
+#define _FS_CEPH_MON_CLIENT_H
+
+#include <linux/completion.h>
+#include <linux/kref.h>
+#include <linux/rbtree.h>
+
+#include <linux/ceph/messenger.h>
+
+struct ceph_client;
+struct ceph_mount_args;
+struct ceph_auth_client;
+
+/*
+ * The monitor map enumerates the set of all monitors.
+ */
+struct ceph_monmap {
+       struct ceph_fsid fsid;
+       u32 epoch;
+       u32 num_mon;
+       struct ceph_entity_inst mon_inst[0];
+};
+
+struct ceph_mon_client;
+struct ceph_mon_generic_request;
+
+
+/*
+ * Generic mechanism for resending monitor requests.
+ */
+typedef void (*ceph_monc_request_func_t)(struct ceph_mon_client *monc,
+                                        int newmon);
+
+/* a pending monitor request */
+struct ceph_mon_request {
+       struct ceph_mon_client *monc;
+       struct delayed_work delayed_work;
+       unsigned long delay;
+       ceph_monc_request_func_t do_request;
+};
+
+/*
+ * ceph_mon_generic_request is being used for the statfs and
+ * mon_get_version requests which are being done a bit differently
+ * because we need to get data back to the caller
+ */
+struct ceph_mon_generic_request {
+       struct kref kref;
+       u64 tid;
+       struct rb_node node;
+       int result;
+       void *buf;
+       struct completion completion;
+       struct ceph_msg *request;  /* original request */
+       struct ceph_msg *reply;    /* and reply */
+};
+
+struct ceph_mon_client {
+       struct ceph_client *client;
+       struct ceph_monmap *monmap;
+
+       struct mutex mutex;
+       struct delayed_work delayed_work;
+
+       struct ceph_auth_client *auth;
+       struct ceph_msg *m_auth, *m_auth_reply, *m_subscribe, *m_subscribe_ack;
+       int pending_auth;
+
+       bool hunting;
+       int cur_mon;                       /* last monitor i contacted */
+       unsigned long sub_sent, sub_renew_after;
+       struct ceph_connection con;
+
+       /* pending generic requests */
+       struct rb_root generic_request_tree;
+       int num_generic_requests;
+       u64 last_tid;
+
+       /* mds/osd map */
+       int want_mdsmap;
+       int want_next_osdmap; /* 1 = want, 2 = want+asked */
+       u32 have_osdmap, have_mdsmap;
+
+#ifdef CONFIG_DEBUG_FS
+       struct dentry *debugfs_file;
+#endif
+};
+
+extern struct ceph_monmap *ceph_monmap_decode(void *p, void *end);
+extern int ceph_monmap_contains(struct ceph_monmap *m,
+                               struct ceph_entity_addr *addr);
+
+extern int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl);
+extern void ceph_monc_stop(struct ceph_mon_client *monc);
+
+/*
+ * The model here is to indicate that we need a new map of at least
+ * epoch @want, and also call in when we receive a map.  We will
+ * periodically rerequest the map from the monitor cluster until we
+ * get what we want.
+ */
+extern int ceph_monc_got_mdsmap(struct ceph_mon_client *monc, u32 have);
+extern int ceph_monc_got_osdmap(struct ceph_mon_client *monc, u32 have);
+
+extern void ceph_monc_request_next_osdmap(struct ceph_mon_client *monc);
+extern int ceph_monc_wait_osdmap(struct ceph_mon_client *monc, u32 epoch,
+                                unsigned long timeout);
+
+extern int ceph_monc_do_statfs(struct ceph_mon_client *monc,
+                              struct ceph_statfs *buf);
+
+extern int ceph_monc_do_get_version(struct ceph_mon_client *monc,
+                                   const char *what, u64 *newest);
+
+extern int ceph_monc_open_session(struct ceph_mon_client *monc);
+
+extern int ceph_monc_validate_auth(struct ceph_mon_client *monc);
+
+#endif