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3d14c5d2b6
This factors out protocol and low-level storage parts of ceph into a separate libceph module living in net/ceph and include/linux/ceph. This is mostly a matter of moving files around. However, a few key pieces of the interface change as well: - ceph_client becomes ceph_fs_client and ceph_client, where the latter captures the mon and osd clients, and the fs_client gets the mds client and file system specific pieces. - Mount option parsing and debugfs setup is correspondingly broken into two pieces. - The mon client gets a generic handler callback for otherwise unknown messages (mds map, in this case). - The basic supported/required feature bits can be expanded (and are by ceph_fs_client). No functional change, aside from some subtle error handling cases that got cleaned up in the refactoring process. Signed-off-by: Sage Weil <sage@newdream.net>
123 lines
3.1 KiB
C
123 lines
3.1 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 "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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/*
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* ceph_mon_generic_request is being used for the statfs and poolop requests
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* which are bening done a bit differently because we need to get data back
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* to the caller
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*/
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struct ceph_mon_generic_request {
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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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void *buf;
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int buf_len;
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struct completion completion;
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struct ceph_msg *request; /* original request */
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struct ceph_msg *reply; /* and reply */
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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_sent, sub_renew_after;
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struct ceph_connection *con;
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bool have_fsid;
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/* pending generic requests */
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struct rb_root generic_request_tree;
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int num_generic_requests;
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u64 last_tid;
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/* mds/osd map */
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int want_mdsmap;
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int want_next_osdmap; /* 1 = want, 2 = want+asked */
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u32 have_osdmap, have_mdsmap;
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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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/*
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* The model here is to indicate that we need a new map of at least
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* epoch @want, 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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extern int ceph_monc_got_mdsmap(struct ceph_mon_client *monc, u32 have);
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extern int ceph_monc_got_osdmap(struct ceph_mon_client *monc, u32 have);
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extern void ceph_monc_request_next_osdmap(struct ceph_mon_client *monc);
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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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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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extern int ceph_monc_create_snapid(struct ceph_mon_client *monc,
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u32 pool, u64 *snapid);
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extern int ceph_monc_delete_snapid(struct ceph_mon_client *monc,
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u32 pool, u64 snapid);
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#endif
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