| #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; |
| }; |
| |
| |
| #define CEPH_OSD_MAX_OP 10 |
| |
| /* 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_flags; /* any additional flags for the osd */ |
| u32 r_sent; /* >0 if r_request is sending/sent */ |
| int r_num_ops; |
| |
| /* encoded message content */ |
| struct ceph_osd_op *r_request_ops; |
| /* these are updated on each send */ |
| __le32 *r_request_osdmap_epoch; |
| __le32 *r_request_flags; |
| __le64 *r_request_pool; |
| void *r_request_pgid; |
| __le32 *r_request_attempts; |
| struct ceph_eversion *r_request_reassert_version; |
| |
| int r_result; |
| int r_reply_op_len[CEPH_OSD_MAX_OP]; |
| s32 r_reply_op_result[CEPH_OSD_MAX_OP]; |
| 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; |
| u64 r_snapid; |
| 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 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 payload_len; |
| union { |
| struct { |
| u64 offset, length; |
| u64 truncate_size; |
| u32 truncate_seq; |
| } extent; |
| struct { |
| const char *name; |
| const char *val; |
| u32 name_len; |
| u32 value_len; |
| __u8 cmp_op; /* CEPH_OSD_CMPXATTR_OP_* */ |
| __u8 cmp_mode; /* CEPH_OSD_CMPXATTR_MODE_* */ |
| } xattr; |
| struct { |
| const char *class_name; |
| const char *method_name; |
| const char *indata; |
| u32 indata_len; |
| __u8 class_len; |
| __u8 method_len; |
| __u8 argc; |
| } cls; |
| struct { |
| u64 cookie; |
| u64 count; |
| } pgls; |
| struct { |
| u64 snapid; |
| } snap; |
| struct { |
| u64 cookie; |
| u64 ver; |
| u32 prot_ver; |
| u32 timeout; |
| __u8 flag; |
| } watch; |
| }; |
| }; |
| |
| 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 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, |
| struct ceph_snap_context *snapc, |
| unsigned int num_op, |
| bool use_mempool, |
| gfp_t gfp_flags); |
| |
| extern void ceph_osdc_build_request(struct ceph_osd_request *req, |
| u64 off, u64 len, |
| unsigned int num_op, |
| 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 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); |
| |
| /* watch/notify events */ |
| extern int ceph_osdc_create_event(struct ceph_osd_client *osdc, |
| void (*event_cb)(u64, u64, u8, void *), |
| void *data, struct ceph_osd_event **pevent); |
| extern void ceph_osdc_cancel_event(struct ceph_osd_event *event); |
| extern void ceph_osdc_put_event(struct ceph_osd_event *event); |
| #endif |
| |