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-rw-r--r--fs/ceph/mon_client.h119
1 files changed, 119 insertions, 0 deletions
diff --git a/fs/ceph/mon_client.h b/fs/ceph/mon_client.h
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+++ b/fs/ceph/mon_client.h
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+#ifndef _FS_CEPH_MON_CLIENT_H
+#define _FS_CEPH_MON_CLIENT_H
+
+#include <linux/completion.h>
+#include <linux/rbtree.h>
+
+#include "messenger.h"
+#include "msgpool.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_statfs_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;
+};
+
+/*
+ * statfs() is done a bit differently because we need to get data back
+ * to the caller
+ */
+struct ceph_mon_statfs_request {
+ u64 tid;
+ struct rb_node node;
+ int result;
+ struct ceph_statfs *buf;
+ struct completion completion;
+ unsigned long last_attempt, delay; /* jiffies */
+ struct ceph_msg *request; /* original request */
+};
+
+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;
+ int pending_auth;
+
+ bool hunting;
+ int cur_mon; /* last monitor i contacted */
+ unsigned long sub_sent, sub_renew_after;
+ struct ceph_connection *con;
+ bool have_fsid;
+
+ /* msg pools */
+ struct ceph_msgpool msgpool_subscribe_ack;
+ struct ceph_msgpool msgpool_statfs_reply;
+ struct ceph_msgpool msgpool_auth_reply;
+
+ /* pending statfs requests */
+ struct rb_root statfs_request_tree;
+ int num_statfs_requests;
+ u64 last_tid;
+
+ /* mds/osd map */
+ 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_do_statfs(struct ceph_mon_client *monc,
+ struct ceph_statfs *buf);
+
+extern int ceph_monc_open_session(struct ceph_mon_client *monc);
+
+extern int ceph_monc_validate_auth(struct ceph_mon_client *monc);
+
+
+
+#endif