forked from rrcarlosr/Jetpack
152 lines
3.8 KiB
C
152 lines
3.8 KiB
C
#ifndef _FS_CEPH_MON_CLIENT_H
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#define _FS_CEPH_MON_CLIENT_H
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#include <linux/completion.h>
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#include <linux/kref.h>
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#include <linux/rbtree.h>
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#include <linux/ceph/messenger.h>
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struct ceph_client;
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struct ceph_mount_args;
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struct ceph_auth_client;
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/*
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* The monitor map enumerates the set of all monitors.
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*/
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struct ceph_monmap {
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struct ceph_fsid fsid;
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u32 epoch;
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u32 num_mon;
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struct ceph_entity_inst mon_inst[0];
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};
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struct ceph_mon_client;
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struct ceph_mon_generic_request;
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/*
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* Generic mechanism for resending monitor requests.
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*/
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typedef void (*ceph_monc_request_func_t)(struct ceph_mon_client *monc,
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int newmon);
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/* a pending monitor request */
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struct ceph_mon_request {
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struct ceph_mon_client *monc;
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struct delayed_work delayed_work;
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unsigned long delay;
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ceph_monc_request_func_t do_request;
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};
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typedef void (*ceph_monc_callback_t)(struct ceph_mon_generic_request *);
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/*
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* ceph_mon_generic_request is being used for the statfs and
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* mon_get_version requests which are being done a bit differently
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* because we need to get data back to the caller
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*/
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struct ceph_mon_generic_request {
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struct ceph_mon_client *monc;
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struct kref kref;
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u64 tid;
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struct rb_node node;
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int result;
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struct completion completion;
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ceph_monc_callback_t complete_cb;
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u64 private_data; /* r_tid/linger_id */
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struct ceph_msg *request; /* original request */
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struct ceph_msg *reply; /* and reply */
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union {
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struct ceph_statfs *st;
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u64 newest;
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} u;
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};
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struct ceph_mon_client {
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struct ceph_client *client;
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struct ceph_monmap *monmap;
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struct mutex mutex;
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struct delayed_work delayed_work;
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struct ceph_auth_client *auth;
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struct ceph_msg *m_auth, *m_auth_reply, *m_subscribe, *m_subscribe_ack;
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int pending_auth;
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bool hunting;
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int cur_mon; /* last monitor i contacted */
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unsigned long sub_renew_after;
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unsigned long sub_renew_sent;
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struct ceph_connection con;
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bool had_a_connection;
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int hunt_mult; /* [1..CEPH_MONC_HUNT_MAX_MULT] */
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/* pending generic requests */
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struct rb_root generic_request_tree;
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u64 last_tid;
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/* subs, indexed with CEPH_SUB_* */
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struct {
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struct ceph_mon_subscribe_item item;
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bool want;
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u32 have; /* epoch */
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} subs[4];
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int fs_cluster_id; /* "mdsmap.<id>" sub */
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#ifdef CONFIG_DEBUG_FS
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struct dentry *debugfs_file;
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#endif
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};
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extern struct ceph_monmap *ceph_monmap_decode(void *p, void *end);
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extern int ceph_monmap_contains(struct ceph_monmap *m,
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struct ceph_entity_addr *addr);
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extern int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl);
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extern void ceph_monc_stop(struct ceph_mon_client *monc);
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enum {
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CEPH_SUB_MONMAP = 0,
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CEPH_SUB_OSDMAP,
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CEPH_SUB_FSMAP,
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CEPH_SUB_MDSMAP,
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};
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extern const char *ceph_sub_str[];
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/*
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* The model here is to indicate that we need a new map of at least
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* epoch @epoch, and also call in when we receive a map. We will
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* periodically rerequest the map from the monitor cluster until we
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* get what we want.
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*/
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bool ceph_monc_want_map(struct ceph_mon_client *monc, int sub, u32 epoch,
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bool continuous);
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void ceph_monc_got_map(struct ceph_mon_client *monc, int sub, u32 epoch);
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void ceph_monc_renew_subs(struct ceph_mon_client *monc);
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extern int ceph_monc_wait_osdmap(struct ceph_mon_client *monc, u32 epoch,
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unsigned long timeout);
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extern int ceph_monc_do_statfs(struct ceph_mon_client *monc,
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struct ceph_statfs *buf);
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int ceph_monc_get_version(struct ceph_mon_client *monc, const char *what,
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u64 *newest);
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int ceph_monc_get_version_async(struct ceph_mon_client *monc, const char *what,
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ceph_monc_callback_t cb, u64 private_data);
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int ceph_monc_blacklist_add(struct ceph_mon_client *monc,
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struct ceph_entity_addr *client_addr);
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extern int ceph_monc_open_session(struct ceph_mon_client *monc);
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extern int ceph_monc_validate_auth(struct ceph_mon_client *monc);
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#endif
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