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 poolop requests
  44 * which are bening done a bit differently because we need to get data back
  45 * 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        int buf_len;
  54        struct completion completion;
  55        struct ceph_msg *request;  /* original request */
  56        struct ceph_msg *reply;    /* and reply */
  57};
  58
  59struct ceph_mon_client {
  60        struct ceph_client *client;
  61        struct ceph_monmap *monmap;
  62
  63        struct mutex mutex;
  64        struct delayed_work delayed_work;
  65
  66        struct ceph_auth_client *auth;
  67        struct ceph_msg *m_auth, *m_auth_reply, *m_subscribe, *m_subscribe_ack;
  68        int pending_auth;
  69
  70        bool hunting;
  71        int cur_mon;                       /* last monitor i contacted */
  72        unsigned long sub_sent, sub_renew_after;
  73        struct ceph_connection con;
  74
  75        /* pending generic requests */
  76        struct rb_root generic_request_tree;
  77        int num_generic_requests;
  78        u64 last_tid;
  79
  80        /* mds/osd map */
  81        int want_mdsmap;
  82        int want_next_osdmap; /* 1 = want, 2 = want+asked */
  83        u32 have_osdmap, have_mdsmap;
  84
  85#ifdef CONFIG_DEBUG_FS
  86        struct dentry *debugfs_file;
  87#endif
  88};
  89
  90extern struct ceph_monmap *ceph_monmap_decode(void *p, void *end);
  91extern int ceph_monmap_contains(struct ceph_monmap *m,
  92                                struct ceph_entity_addr *addr);
  93
  94extern int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl);
  95extern void ceph_monc_stop(struct ceph_mon_client *monc);
  96
  97/*
  98 * The model here is to indicate that we need a new map of at least
  99 * epoch @want, and also call in when we receive a map.  We will
 100 * periodically rerequest the map from the monitor cluster until we
 101 * get what we want.
 102 */
 103extern int ceph_monc_got_mdsmap(struct ceph_mon_client *monc, u32 have);
 104extern int ceph_monc_got_osdmap(struct ceph_mon_client *monc, u32 have);
 105
 106extern void ceph_monc_request_next_osdmap(struct ceph_mon_client *monc);
 107
 108extern int ceph_monc_do_statfs(struct ceph_mon_client *monc,
 109                               struct ceph_statfs *buf);
 110
 111extern int ceph_monc_open_session(struct ceph_mon_client *monc);
 112
 113extern int ceph_monc_validate_auth(struct ceph_mon_client *monc);
 114
 115extern int ceph_monc_create_snapid(struct ceph_mon_client *monc,
 116                                   u32 pool, u64 *snapid);
 117
 118extern int ceph_monc_delete_snapid(struct ceph_mon_client *monc,
 119                                   u32 pool, u64 snapid);
 120
 121#endif
 122