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usr
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src
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linux-headers-6.8.0-83
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include
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linux
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ceph
/ [
drwxr-xr-x
]
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mon_client.h
/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _FS_CEPH_MON_CLIENT_H #define _FS_CEPH_MON_CLIENT_H #include <linux/completion.h> #include <linux/kref.h> #include <linux/rbtree.h> #include <linux/ceph/messenger.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[] __counted_by(num_mon); }; struct ceph_mon_client; struct ceph_mon_generic_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; }; typedef void (*ceph_monc_callback_t)(struct ceph_mon_generic_request *); /* * ceph_mon_generic_request is being used for the statfs and * mon_get_version requests which are being done a bit differently * because we need to get data back to the caller */ struct ceph_mon_generic_request { struct ceph_mon_client *monc; struct kref kref; u64 tid; struct rb_node node; int result; struct completion completion; ceph_monc_callback_t complete_cb; u64 private_data; /* r_tid/linger_id */ struct ceph_msg *request; /* original request */ struct ceph_msg *reply; /* and reply */ union { struct ceph_statfs *st; u64 newest; } u; }; 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, *m_auth_reply, *m_subscribe, *m_subscribe_ack; int pending_auth; bool hunting; int cur_mon; /* last monitor i contacted */ unsigned long sub_renew_after; unsigned long sub_renew_sent; struct ceph_connection con; bool had_a_connection; int hunt_mult; /* [1..CEPH_MONC_HUNT_MAX_MULT] */ /* pending generic requests */ struct rb_root generic_request_tree; u64 last_tid; /* subs, indexed with CEPH_SUB_* */ struct { struct ceph_mon_subscribe_item item; bool want; u32 have; /* epoch */ } subs[4]; int fs_cluster_id; /* "mdsmap.<id>" sub */ #ifdef CONFIG_DEBUG_FS struct dentry *debugfs_file; #endif }; 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); extern void ceph_monc_reopen_session(struct ceph_mon_client *monc); enum { CEPH_SUB_MONMAP = 0, CEPH_SUB_OSDMAP, CEPH_SUB_FSMAP, CEPH_SUB_MDSMAP, }; extern const char *ceph_sub_str[]; /* * The model here is to indicate that we need a new map of at least * epoch @epoch, 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. */ bool ceph_monc_want_map(struct ceph_mon_client *monc, int sub, u32 epoch, bool continuous); void ceph_monc_got_map(struct ceph_mon_client *monc, int sub, u32 epoch); void ceph_monc_renew_subs(struct ceph_mon_client *monc); extern int ceph_monc_wait_osdmap(struct ceph_mon_client *monc, u32 epoch, unsigned long timeout); int ceph_monc_do_statfs(struct ceph_mon_client *monc, u64 data_pool, struct ceph_statfs *buf); int ceph_monc_get_version(struct ceph_mon_client *monc, const char *what, u64 *newest); int ceph_monc_get_version_async(struct ceph_mon_client *monc, const char *what, ceph_monc_callback_t cb, u64 private_data); int ceph_monc_blocklist_add(struct ceph_mon_client *monc, struct ceph_entity_addr *client_addr); extern int ceph_monc_open_session(struct ceph_mon_client *monc); extern int ceph_monc_validate_auth(struct ceph_mon_client *monc); #endif
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