include/linux/ceph/mon_client.h

Source file repositories/reference/linux-study-clean/include/linux/ceph/mon_client.h

File Facts

System
Linux kernel
Corpus path
include/linux/ceph/mon_client.h
Extension
.h
Size
3937 bytes
Lines
153
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

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,

Annotation

Implementation Notes