xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ceph: monitor client

Browse Source 
The monitor cluster is responsible for managing cluster membership
and state.  The monitor client handles what minimal interaction
the Ceph client has with it: checking for updated versions of the
MDS and OSD maps, getting statfs() information, and unmounting.

Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Sage Weil
2009-10-06 11:31:11 -07:00
parent 5ecc0a0f81
commit ba75bb98cf
2 changed files with 803 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

109
fs/ceph/mon_client.h Normal file
View File

@@ -0,0 +1,109 @@
#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;
/*
* 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;
bool hunting;
int cur_mon; /* last monitor i contacted */
unsigned long sub_sent, sub_renew_after;
struct ceph_connection *con;
/* msg pools */
struct ceph_msgpool msgpool_mount_ack;
struct ceph_msgpool msgpool_subscribe_ack;
struct ceph_msgpool msgpool_statfs_reply;
/* pending statfs requests */
struct radix_tree_root statfs_request_tree;
int num_statfs_requests;
u64 last_tid;
/* mds/osd map or mount requests */
bool want_mount;
int want_next_osdmap; /* 1 = want, 2 = want+asked */
u32 have_osdmap, have_mdsmap;
struct dentry *debugfs_file;
};
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_request_mount(struct ceph_mon_client *monc);
extern int ceph_monc_do_statfs(struct ceph_mon_client *monc,
struct ceph_statfs *buf);
#endif