LXR linux/include/linux/ceph/mon

   1#ifndef _FS_CEPH_MON_CLIENT_H
   2#define _FS_CEPH_MON_CLIENT_H
   3
   4#include <linux/completion.h>
   5#include <linux/kref.h>
   6#include <linux/rbtree.h>
   7
   8#include <linux/ceph/messenger.h>
   9
  10struct ceph_client;
  11struct ceph_mount_args;
  12struct ceph_auth_client;
  13
  14/*
  15 * The monitor map enumerates the set of all monitors.
  16 */
  17struct ceph_monmap {
  18        struct ceph_fsid fsid;
  19        u32 epoch;
  20        u32 num_mon;
  21        struct ceph_entity_inst mon_inst[0];
  22};
  23
  24struct ceph_mon_client;
  25struct ceph_mon_generic_request;
  26
  27
  28/*
  29 * Generic mechanism for resending monitor requests.
  30 */
  31typedef void (*ceph_monc_request_func_t)(struct ceph_mon_client *monc,
  32                                         int newmon);
  33
  34/* a pending monitor request */
  35struct ceph_mon_request {
  36        struct ceph_mon_client *monc;
  37        struct delayed_work delayed_work;
  38        unsigned long delay;
  39        ceph_monc_request_func_t do_request;
  40};
  41
  42/*
  43 * ceph_mon_generic_request is being used for the statfs and
  44 * mon_get_version requests which are being done a bit differently
  45 * because we need to get data back to the caller
  46 */
  47struct ceph_mon_generic_request {
  48        struct kref kref;
  49        u64 tid;
  50        struct rb_node node;
  51        int result;
  52        void *buf;
  53        struct completion completion;
  54        struct ceph_msg *request;  /* original request */
  55        struct ceph_msg *reply;    /* and reply */
  56};
  57
  58struct ceph_mon_client {
  59        struct ceph_client *client;
  60        struct ceph_monmap *monmap;
  61
  62        struct mutex mutex;
  63        struct delayed_work delayed_work;
  64
  65        struct ceph_auth_client *auth;
  66        struct ceph_msg *m_auth, *m_auth_reply, *m_subscribe, *m_subscribe_ack;
  67        int pending_auth;
  68
  69        bool hunting;
  70        int cur_mon;                       /* last monitor i contacted */
  71        unsigned long sub_sent, sub_renew_after;
  72        struct ceph_connection con;
  73
  74        /* pending generic requests */
  75        struct rb_root generic_request_tree;
  76        int num_generic_requests;
  77        u64 last_tid;
  78
  79        /* mds/osd map */
  80        int want_mdsmap;
  81        int want_next_osdmap; /* 1 = want, 2 = want+asked */
  82        u32 have_osdmap, have_mdsmap;
  83
  84#ifdef CONFIG_DEBUG_FS
  85        struct dentry *debugfs_file;
  86#endif
  87};
  88
  89extern struct ceph_monmap *ceph_monmap_decode(void *p, void *end);
  90extern int ceph_monmap_contains(struct ceph_monmap *m,
  91                                struct ceph_entity_addr *addr);
  92
  93extern int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl);
  94extern void ceph_monc_stop(struct ceph_mon_client *monc);
  95
  96/*
  97 * The model here is to indicate that we need a new map of at least
  98 * epoch @want, and also call in when we receive a map.  We will
  99 * periodically rerequest the map from the monitor cluster until we
 100 * get what we want.
 101 */
 102extern int ceph_monc_got_mdsmap(struct ceph_mon_client *monc, u32 have);
 103extern int ceph_monc_got_osdmap(struct ceph_mon_client *monc, u32 have);
 104
 105extern void ceph_monc_request_next_osdmap(struct ceph_mon_client *monc);
 106extern int ceph_monc_wait_osdmap(struct ceph_mon_client *monc, u32 epoch,
 107                                 unsigned long timeout);
 108
 109extern int ceph_monc_do_statfs(struct ceph_mon_client *monc,
 110                               struct ceph_statfs *buf);
 111
 112extern int ceph_monc_do_get_version(struct ceph_mon_client *monc,
 113                                    const char *what, u64 *newest);
 114
 115extern int ceph_monc_open_session(struct ceph_mon_client *monc);
 116
 117extern int ceph_monc_validate_auth(struct ceph_mon_client *monc);
 118
 119#endif
 120