| #ifndef _FS_CEPH_MON_CLIENT_H |
| #define _FS_CEPH_MON_CLIENT_H |
| |
| #include <linux/completion.h> |
| #include <linux/radix-tree.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; |
| 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; |
| |
| 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 radix_tree_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); |
| |
| |
| |
| #endif |