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- #ifndef _FS_CEPH_OSD_CLIENT_H
- #define _FS_CEPH_OSD_CLIENT_H
- #include <linux/completion.h>
- #include <linux/kref.h>
- #include <linux/mempool.h>
- #include <linux/rbtree.h>
- #include <linux/ceph/types.h>
- #include <linux/ceph/osdmap.h>
- #include <linux/ceph/messenger.h>
- #include <linux/ceph/auth.h>
- #include <linux/ceph/pagelist.h>
- /*
- * Maximum object name size
- * (must be at least as big as RBD_MAX_MD_NAME_LEN -- currently 100)
- */
- #define MAX_OBJ_NAME_SIZE 100
- struct ceph_msg;
- struct ceph_snap_context;
- struct ceph_osd_request;
- struct ceph_osd_client;
- struct ceph_authorizer;
- /*
- * completion callback for async writepages
- */
- typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *,
- struct ceph_msg *);
- /* a given osd we're communicating with */
- struct ceph_osd {
- atomic_t o_ref;
- struct ceph_osd_client *o_osdc;
- int o_osd;
- int o_incarnation;
- struct rb_node o_node;
- struct ceph_connection o_con;
- struct list_head o_requests;
- struct list_head o_linger_requests;
- struct list_head o_osd_lru;
- struct ceph_auth_handshake o_auth;
- unsigned long lru_ttl;
- int o_marked_for_keepalive;
- struct list_head o_keepalive_item;
- };
- /* an in-flight request */
- struct ceph_osd_request {
- u64 r_tid; /* unique for this client */
- struct rb_node r_node;
- struct list_head r_req_lru_item;
- struct list_head r_osd_item;
- struct list_head r_linger_item;
- struct list_head r_linger_osd;
- struct ceph_osd *r_osd;
- struct ceph_pg r_pgid;
- int r_pg_osds[CEPH_PG_MAX_SIZE];
- int r_num_pg_osds;
- struct ceph_connection *r_con_filling_msg;
- struct ceph_msg *r_request, *r_reply;
- int r_result;
- int r_flags; /* any additional flags for the osd */
- u32 r_sent; /* >0 if r_request is sending/sent */
- int r_got_reply;
- int r_linger;
- struct ceph_osd_client *r_osdc;
- struct kref r_kref;
- bool r_mempool;
- struct completion r_completion, r_safe_completion;
- ceph_osdc_callback_t r_callback, r_safe_callback;
- struct ceph_eversion r_reassert_version;
- struct list_head r_unsafe_item;
- struct inode *r_inode; /* for use by callbacks */
- void *r_priv; /* ditto */
- char r_oid[MAX_OBJ_NAME_SIZE]; /* object name */
- int r_oid_len;
- unsigned long r_stamp; /* send OR check time */
- struct ceph_file_layout r_file_layout;
- struct ceph_snap_context *r_snapc; /* snap context for writes */
- unsigned r_num_pages; /* size of page array (follows) */
- unsigned r_page_alignment; /* io offset in first page */
- struct page **r_pages; /* pages for data payload */
- int r_pages_from_pool;
- int r_own_pages; /* if true, i own page list */
- #ifdef CONFIG_BLOCK
- struct bio *r_bio; /* instead of pages */
- #endif
- struct ceph_pagelist r_trail; /* trailing part of the data */
- };
- struct ceph_osd_event {
- u64 cookie;
- int one_shot;
- struct ceph_osd_client *osdc;
- void (*cb)(u64, u64, u8, void *);
- void *data;
- struct rb_node node;
- struct list_head osd_node;
- struct kref kref;
- struct completion completion;
- };
- struct ceph_osd_event_work {
- struct work_struct work;
- struct ceph_osd_event *event;
- u64 ver;
- u64 notify_id;
- u8 opcode;
- };
- struct ceph_osd_client {
- struct ceph_client *client;
- struct ceph_osdmap *osdmap; /* current map */
- struct rw_semaphore map_sem;
- struct completion map_waiters;
- u64 last_requested_map;
- struct mutex request_mutex;
- struct rb_root osds; /* osds */
- struct list_head osd_lru; /* idle osds */
- u64 timeout_tid; /* tid of timeout triggering rq */
- u64 last_tid; /* tid of last request */
- struct rb_root requests; /* pending requests */
- struct list_head req_lru; /* in-flight lru */
- struct list_head req_unsent; /* unsent/need-resend queue */
- struct list_head req_notarget; /* map to no osd */
- struct list_head req_linger; /* lingering requests */
- int num_requests;
- struct delayed_work timeout_work;
- struct delayed_work osds_timeout_work;
- #ifdef CONFIG_DEBUG_FS
- struct dentry *debugfs_file;
- #endif
- mempool_t *req_mempool;
- struct ceph_msgpool msgpool_op;
- struct ceph_msgpool msgpool_op_reply;
- spinlock_t event_lock;
- struct rb_root event_tree;
- u64 event_count;
- struct workqueue_struct *notify_wq;
- };
- struct ceph_osd_req_op {
- u16 op; /* CEPH_OSD_OP_* */
- u32 flags; /* CEPH_OSD_FLAG_* */
- union {
- struct {
- u64 offset, length;
- u64 truncate_size;
- u32 truncate_seq;
- } extent;
- struct {
- const char *name;
- u32 name_len;
- const char *val;
- u32 value_len;
- __u8 cmp_op; /* CEPH_OSD_CMPXATTR_OP_* */
- __u8 cmp_mode; /* CEPH_OSD_CMPXATTR_MODE_* */
- } xattr;
- struct {
- const char *class_name;
- __u8 class_len;
- const char *method_name;
- __u8 method_len;
- __u8 argc;
- const char *indata;
- u32 indata_len;
- } cls;
- struct {
- u64 cookie, count;
- } pgls;
- struct {
- u64 snapid;
- } snap;
- struct {
- u64 cookie;
- u64 ver;
- __u8 flag;
- u32 prot_ver;
- u32 timeout;
- } watch;
- };
- u32 payload_len;
- };
- extern int ceph_osdc_init(struct ceph_osd_client *osdc,
- struct ceph_client *client);
- extern void ceph_osdc_stop(struct ceph_osd_client *osdc);
- extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
- struct ceph_msg *msg);
- extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
- struct ceph_msg *msg);
- extern int ceph_calc_raw_layout(struct ceph_file_layout *layout,
- u64 off, u64 *plen, u64 *bno,
- struct ceph_osd_request *req,
- struct ceph_osd_req_op *op);
- extern struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
- struct ceph_snap_context *snapc,
- struct ceph_osd_req_op *ops,
- bool use_mempool,
- gfp_t gfp_flags,
- struct page **pages,
- struct bio *bio);
- extern void ceph_osdc_build_request(struct ceph_osd_request *req,
- u64 off, u64 len,
- struct ceph_osd_req_op *src_ops,
- struct ceph_snap_context *snapc,
- u64 snap_id,
- struct timespec *mtime);
- extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *,
- struct ceph_file_layout *layout,
- struct ceph_vino vino,
- u64 offset, u64 *len, int op, int flags,
- struct ceph_snap_context *snapc,
- int do_sync, u32 truncate_seq,
- u64 truncate_size,
- struct timespec *mtime,
- bool use_mempool, int num_reply,
- int page_align);
- extern void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
- struct ceph_osd_request *req);
- extern void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
- struct ceph_osd_request *req);
- static inline void ceph_osdc_get_request(struct ceph_osd_request *req)
- {
- kref_get(&req->r_kref);
- }
- extern void ceph_osdc_release_request(struct kref *kref);
- static inline void ceph_osdc_put_request(struct ceph_osd_request *req)
- {
- kref_put(&req->r_kref, ceph_osdc_release_request);
- }
- extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
- struct ceph_osd_request *req,
- bool nofail);
- extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
- struct ceph_osd_request *req);
- extern void ceph_osdc_sync(struct ceph_osd_client *osdc);
- extern int ceph_osdc_readpages(struct ceph_osd_client *osdc,
- struct ceph_vino vino,
- struct ceph_file_layout *layout,
- u64 off, u64 *plen,
- u32 truncate_seq, u64 truncate_size,
- struct page **pages, int nr_pages,
- int page_align);
- extern int ceph_osdc_writepages(struct ceph_osd_client *osdc,
- struct ceph_vino vino,
- struct ceph_file_layout *layout,
- struct ceph_snap_context *sc,
- u64 off, u64 len,
- u32 truncate_seq, u64 truncate_size,
- struct timespec *mtime,
- struct page **pages, int nr_pages,
- int flags, int do_sync, bool nofail);
- /* watch/notify events */
- extern int ceph_osdc_create_event(struct ceph_osd_client *osdc,
- void (*event_cb)(u64, u64, u8, void *),
- int one_shot, void *data,
- struct ceph_osd_event **pevent);
- extern void ceph_osdc_cancel_event(struct ceph_osd_event *event);
- extern int ceph_osdc_wait_event(struct ceph_osd_event *event,
- unsigned long timeout);
- extern void ceph_osdc_put_event(struct ceph_osd_event *event);
- #endif
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