344 lines
10 KiB
C
344 lines
10 KiB
C
#ifndef _FS_CEPH_OSD_CLIENT_H
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#define _FS_CEPH_OSD_CLIENT_H
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#include <linux/completion.h>
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#include <linux/kref.h>
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#include <linux/mempool.h>
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#include <linux/rbtree.h>
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#include <linux/ceph/types.h>
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#include <linux/ceph/osdmap.h>
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#include <linux/ceph/messenger.h>
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#include <linux/ceph/auth.h>
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#include <linux/ceph/pagelist.h>
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/*
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* Maximum object name size
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* (must be at least as big as RBD_MAX_MD_NAME_LEN -- currently 100)
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*/
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#define MAX_OBJ_NAME_SIZE 100
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struct ceph_msg;
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struct ceph_snap_context;
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struct ceph_osd_request;
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struct ceph_osd_client;
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struct ceph_authorizer;
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/*
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* completion callback for async writepages
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*/
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typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *,
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struct ceph_msg *);
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/* a given osd we're communicating with */
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struct ceph_osd {
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atomic_t o_ref;
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struct ceph_osd_client *o_osdc;
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int o_osd;
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int o_incarnation;
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struct rb_node o_node;
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struct ceph_connection o_con;
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struct list_head o_requests;
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struct list_head o_linger_requests;
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struct list_head o_osd_lru;
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struct ceph_auth_handshake o_auth;
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unsigned long lru_ttl;
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int o_marked_for_keepalive;
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struct list_head o_keepalive_item;
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};
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#define CEPH_OSD_MAX_OP 2
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enum ceph_osd_data_type {
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CEPH_OSD_DATA_TYPE_NONE = 0,
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CEPH_OSD_DATA_TYPE_PAGES,
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CEPH_OSD_DATA_TYPE_PAGELIST,
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#ifdef CONFIG_BLOCK
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CEPH_OSD_DATA_TYPE_BIO,
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#endif /* CONFIG_BLOCK */
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};
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struct ceph_osd_data {
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enum ceph_osd_data_type type;
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union {
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struct {
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struct page **pages;
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u64 length;
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u32 alignment;
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bool pages_from_pool;
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bool own_pages;
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};
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struct ceph_pagelist *pagelist;
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#ifdef CONFIG_BLOCK
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struct {
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struct bio *bio; /* list of bios */
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size_t bio_length; /* total in list */
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};
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#endif /* CONFIG_BLOCK */
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};
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};
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struct ceph_osd_req_op {
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u16 op; /* CEPH_OSD_OP_* */
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u32 payload_len;
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union {
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struct {
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u64 offset, length;
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u64 truncate_size;
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u32 truncate_seq;
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struct ceph_osd_data osd_data;
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} extent;
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struct {
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const char *class_name;
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const char *method_name;
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const void *request_data;
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struct ceph_osd_data request_info;
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struct ceph_osd_data response_data;
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u32 request_data_len;
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__u8 class_len;
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__u8 method_len;
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__u8 argc;
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} cls;
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struct {
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u64 cookie;
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u64 ver;
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u32 prot_ver;
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u32 timeout;
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__u8 flag;
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} watch;
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};
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};
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/* an in-flight request */
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struct ceph_osd_request {
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u64 r_tid; /* unique for this client */
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struct rb_node r_node;
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struct list_head r_req_lru_item;
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struct list_head r_osd_item;
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struct list_head r_linger_item;
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struct list_head r_linger_osd;
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struct ceph_osd *r_osd;
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struct ceph_pg r_pgid;
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int r_pg_osds[CEPH_PG_MAX_SIZE];
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int r_num_pg_osds;
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struct ceph_msg *r_request, *r_reply;
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int r_flags; /* any additional flags for the osd */
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u32 r_sent; /* >0 if r_request is sending/sent */
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/* request osd ops array */
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unsigned int r_num_ops;
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struct ceph_osd_req_op r_ops[CEPH_OSD_MAX_OP];
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/* these are updated on each send */
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__le32 *r_request_osdmap_epoch;
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__le32 *r_request_flags;
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__le64 *r_request_pool;
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void *r_request_pgid;
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__le32 *r_request_attempts;
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struct ceph_eversion *r_request_reassert_version;
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int r_result;
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int r_reply_op_len[CEPH_OSD_MAX_OP];
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s32 r_reply_op_result[CEPH_OSD_MAX_OP];
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int r_got_reply;
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int r_linger;
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int r_completed;
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struct ceph_osd_client *r_osdc;
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struct kref r_kref;
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bool r_mempool;
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struct completion r_completion, r_safe_completion;
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ceph_osdc_callback_t r_callback, r_safe_callback;
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struct ceph_eversion r_reassert_version;
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struct list_head r_unsafe_item;
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struct inode *r_inode; /* for use by callbacks */
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void *r_priv; /* ditto */
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char r_oid[MAX_OBJ_NAME_SIZE]; /* object name */
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int r_oid_len;
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u64 r_snapid;
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unsigned long r_stamp; /* send OR check time */
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struct ceph_file_layout r_file_layout;
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struct ceph_snap_context *r_snapc; /* snap context for writes */
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};
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struct ceph_osd_event {
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u64 cookie;
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int one_shot;
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struct ceph_osd_client *osdc;
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void (*cb)(u64, u64, u8, void *);
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void *data;
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struct rb_node node;
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struct list_head osd_node;
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struct kref kref;
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};
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struct ceph_osd_event_work {
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struct work_struct work;
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struct ceph_osd_event *event;
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u64 ver;
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u64 notify_id;
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u8 opcode;
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};
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struct ceph_osd_client {
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struct ceph_client *client;
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struct ceph_osdmap *osdmap; /* current map */
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struct rw_semaphore map_sem;
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struct completion map_waiters;
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u64 last_requested_map;
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struct mutex request_mutex;
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struct rb_root osds; /* osds */
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struct list_head osd_lru; /* idle osds */
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u64 timeout_tid; /* tid of timeout triggering rq */
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u64 last_tid; /* tid of last request */
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struct rb_root requests; /* pending requests */
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struct list_head req_lru; /* in-flight lru */
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struct list_head req_unsent; /* unsent/need-resend queue */
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struct list_head req_notarget; /* map to no osd */
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struct list_head req_linger; /* lingering requests */
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int num_requests;
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struct delayed_work timeout_work;
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struct delayed_work osds_timeout_work;
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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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mempool_t *req_mempool;
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struct ceph_msgpool msgpool_op;
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struct ceph_msgpool msgpool_op_reply;
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spinlock_t event_lock;
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struct rb_root event_tree;
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u64 event_count;
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struct workqueue_struct *notify_wq;
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};
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extern int ceph_osdc_init(struct ceph_osd_client *osdc,
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struct ceph_client *client);
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extern void ceph_osdc_stop(struct ceph_osd_client *osdc);
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extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
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struct ceph_msg *msg);
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extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
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struct ceph_msg *msg);
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extern void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
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unsigned int which, u16 opcode,
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u64 offset, u64 length,
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u64 truncate_size, u32 truncate_seq);
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extern void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
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unsigned int which, u64 length);
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extern struct ceph_osd_data *osd_req_op_extent_osd_data(
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struct ceph_osd_request *osd_req,
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unsigned int which, bool write_request);
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extern struct ceph_osd_data *osd_req_op_cls_response_data(
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struct ceph_osd_request *osd_req,
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unsigned int which);
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extern void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *,
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unsigned int which, bool write_request,
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struct page **pages, u64 length,
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u32 alignment, bool pages_from_pool,
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bool own_pages);
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extern void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *,
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unsigned int which, bool write_request,
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struct ceph_pagelist *pagelist);
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#ifdef CONFIG_BLOCK
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extern void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *,
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unsigned int which, bool write_request,
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struct bio *bio, size_t bio_length);
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#endif /* CONFIG_BLOCK */
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extern void osd_req_op_cls_response_data_pages(struct ceph_osd_request *,
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unsigned int which,
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struct page **pages, u64 length,
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u32 alignment, bool pages_from_pool,
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bool own_pages);
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extern void osd_req_op_cls_init(struct ceph_osd_request *osd_req,
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unsigned int which, u16 opcode,
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const char *class, const char *method,
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const void *request_data,
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size_t request_data_size);
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extern void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
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unsigned int which, u16 opcode,
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u64 cookie, u64 version, int flag);
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extern struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
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struct ceph_snap_context *snapc,
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unsigned int num_ops,
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bool use_mempool,
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gfp_t gfp_flags);
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extern void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
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struct ceph_snap_context *snapc,
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u64 snap_id,
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struct timespec *mtime);
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extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *,
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struct ceph_file_layout *layout,
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struct ceph_vino vino,
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u64 offset, u64 *len,
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int num_ops, int opcode, int flags,
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struct ceph_snap_context *snapc,
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u32 truncate_seq, u64 truncate_size,
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bool use_mempool);
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extern void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
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struct ceph_osd_request *req);
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extern void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
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struct ceph_osd_request *req);
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static inline void ceph_osdc_get_request(struct ceph_osd_request *req)
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{
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kref_get(&req->r_kref);
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}
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extern void ceph_osdc_release_request(struct kref *kref);
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static inline void ceph_osdc_put_request(struct ceph_osd_request *req)
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{
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kref_put(&req->r_kref, ceph_osdc_release_request);
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}
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extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
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struct ceph_osd_request *req,
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bool nofail);
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extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
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struct ceph_osd_request *req);
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extern void ceph_osdc_sync(struct ceph_osd_client *osdc);
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extern int ceph_osdc_readpages(struct ceph_osd_client *osdc,
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struct ceph_vino vino,
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struct ceph_file_layout *layout,
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u64 off, u64 *plen,
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u32 truncate_seq, u64 truncate_size,
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struct page **pages, int nr_pages,
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int page_align);
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extern int ceph_osdc_writepages(struct ceph_osd_client *osdc,
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struct ceph_vino vino,
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struct ceph_file_layout *layout,
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struct ceph_snap_context *sc,
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u64 off, u64 len,
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u32 truncate_seq, u64 truncate_size,
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struct timespec *mtime,
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struct page **pages, int nr_pages);
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/* watch/notify events */
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extern int ceph_osdc_create_event(struct ceph_osd_client *osdc,
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void (*event_cb)(u64, u64, u8, void *),
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void *data, struct ceph_osd_event **pevent);
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extern void ceph_osdc_cancel_event(struct ceph_osd_event *event);
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extern void ceph_osdc_put_event(struct ceph_osd_event *event);
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#endif
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