#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>
struct ceph_msg;
struct ceph_snap_context;
struct ceph_osd_request;
struct ceph_osd_client;
/*
* completion callback for async writepages
*/
typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *);
typedef void (*ceph_osdc_unsafe_callback_t)(struct ceph_osd_request *, bool);
#define CEPH_HOMELESS_OSD -1
/* 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 rb_root o_requests;
struct list_head o_linger_requests;
struct list_head o_osd_lru;
struct ceph_auth_handshake o_auth;
unsigned long lru_ttl;
struct list_head o_keepalive_item;
struct mutex lock;
};
#define CEPH_OSD_SLAB_OPS 2
#define CEPH_OSD_MAX_OPS 16
enum ceph_osd_data_type {
CEPH_OSD_DATA_TYPE_NONE = 0,
CEPH_OSD_DATA_TYPE_PAGES,
CEPH_OSD_DATA_TYPE_PAGELIST,
#ifdef CONFIG_BLOCK
CEPH_OSD_DATA_TYPE_BIO,
#endif /* CONFIG_BLOCK */
};
struct ceph_osd_data {
enum ceph_osd_data_type type;
union {
struct {
struct page **pages;
u64 length;
u32 alignment;
bool pages_from_pool;
bool own_pages;
};
struct ceph_pagelist *pagelist;
#ifdef CONFIG_BLOCK
struct {
struct bio *bio; /* list of bios */
size_t bio_length; /* total in list */
};
#endif /* CONFIG_BLOCK */
};
};
struct ceph_osd_req_op {
u16 op; /* CEPH_OSD_OP_* */
u32 flags; /* CEPH_OSD_OP_FLAG_* */
u32 indata_len; /* request */
u32 outdata_len; /* reply */
s32 rval;
union {
struct ceph_osd_data raw_data_in;
struct {
u64 offset, length;
u64 truncate_size;
u32 truncate_seq;
struct ceph_osd_data osd_data;
} extent;
struct {
u32 name_len;
u32 value_len;
__u8 cmp_op; /* CEPH_OSD_CMPXATTR_OP_* */
__u8 cmp_mode; /* CEPH_OSD_CMPXATTR_MODE_* */
struct ceph_osd_data osd_data;
} xattr;
struct {
const char *class_name;
const char *method_name;
struct ceph_osd_data request_info;
struct ceph_osd_data request_data;
struct ceph_osd_data response_data;
__u8 class_len;
__u8 method_len;
u32 indata_len;
} cls;
struct {
u64 cookie;
u64 ver;
u32 prot_ver;
u32 timeout;
__u8 flag;
} watch;
struct {
u64 expected_object_size;
u64 expected_write_size;
} alloc_hint;
};
};
struct ceph_osd_request_target {
struct ceph_object_id base_oid;
struct ceph_object_locator base_oloc;
struct ceph_object_id target_oid;
struct ceph_object_locator target_oloc;
struct ceph_pg pgid;
u32 pg_num;
u32 pg_num_mask;
struct ceph_osds acting;
struct ceph_osds up;
int size;
int min_size;
bool sort_bitwise;
unsigned int flags; /* CEPH_OSD_FLAG_* */
bool paused;
int osd;
};
/* an in-flight request */
struct ceph_osd_request {
u64 r_tid; /* unique for this client */
struct rb_node r_node;
struct list_head r_linger_item;
struct list_head r_linger_osd_item;
struct ceph_osd *r_osd;
struct ceph_osd_request_target r_t;
#define r_base_oid r_t.base_oid
#define r_base_oloc r_t.base_oloc
#define r_flags r_t.flags
struct ceph_msg *r_request, *r_reply;
u32 r_sent; /* >0 if r_request is sending/sent */
/* request osd ops array */
unsigned int r_num_ops;
int r_result;
bool r_got_reply;
int r_linger;
struct ceph_osd_client *r_osdc;
struct kref r_kref;
bool r_mempool;
struct completion r_completion;
struct completion r_safe_completion; /* fsync waiter */
ceph_osdc_callback_t r_callback;
ceph_osdc_unsafe_callback_t r_unsafe_callback;
struct list_head r_unsafe_item;
struct inode *r_inode; /* for use by callbacks */
void *r_priv; /* ditto */
/* set by submitter */
u64 r_snapid; /* for reads, CEPH_NOSNAP o/w */
struct ceph_snap_context *r_snapc; /* for writes */
struct timespec r_mtime; /* ditto */
u64 r_data_offset; /* ditto */
/* internal */
unsigned long r_stamp; /* jiffies, send or check time */
int r_attempts;
struct ceph_eversion r_replay_version; /* aka reassert_version */
u32 r_last_force_resend;
struct ceph_osd_req_op r_ops[];
};
struct ceph_request_redirect {
struct ceph_object_locator oloc;
};
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 lock;
struct rb_root osds; /* osds */
struct list_head osd_lru; /* idle osds */
spinlock_t osd_lru_lock;
struct list_head req_linger; /* lingering requests */
struct ceph_osd homeless_osd;
atomic64_t last_tid; /* tid of last request */
atomic_t num_requests;
atomic_t num_homeless;
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;
};
extern int ceph_osdc_setup(void);
extern void ceph_osdc_cleanup(void);
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 void osd_req_op_init(struct ceph_osd_request *osd_req,
unsigned int which, u16 opcode, u32 flags);
extern void osd_req_op_raw_data_in_pages(struct ceph_osd_request *,
unsigned int which,
struct page **pages, u64 length,
u32 alignment, bool pages_from_pool,
bool own_pages);
extern void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
unsigned int which, u16 opcode,
u64 offset, u64 length,
u64 truncate_size, u32 truncate_seq);
extern void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
unsigned int which, u64 length);
extern void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
unsigned int which, u64 offset_inc);
extern struct ceph_osd_data *osd_req_op_extent_osd_data(
struct ceph_osd_request *osd_req,
unsigned int which);
extern void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *,
unsigned int which,
struct page **pages, u64 length,
u32 alignment, bool pages_from_pool,
bool own_pages);
extern void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *,
unsigned int which,
struct ceph_pagelist *pagelist);
#ifdef CONFIG_BLOCK
extern void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *,
unsigned int which,
struct bio *bio, size_t bio_length);
#endif /* CONFIG_BLOCK */
extern void osd_req_op_cls_request_data_pagelist(struct ceph_osd_request *,
unsigned int which,
struct ceph_pagelist *pagelist);
extern void osd_req_op_cls_request_data_pages(struct ceph_osd_request *,
unsigned int which,
struct page **pages, u64 length,
u32 alignment, bool pages_from_pool,
bool own_pages);
extern void osd_req_op_cls_response_data_pages(struct ceph_osd_request *,
unsigned int which,
struct page **pages, u64 length,
u32 alignment, bool pages_from_pool,
bool own_pages);
extern void osd_req_op_cls_init(struct ceph_osd_request *osd_req,
unsigned int which, u16 opcode,
const char *class, const char *method);
extern int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
u16 opcode, const char *name, const void *value,
size_t size, u8 cmp_op, u8 cmp_mode);
extern void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
unsigned int which, u16 opcode,
u64 cookie, u64 version, int flag);
extern void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
unsigned int which,
u64 expected_object_size,
u64 expected_write_size);
extern struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
struct ceph_snap_context *snapc,
unsigned int num_ops,
bool use_mempool,
gfp_t gfp_flags);
int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp);
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,
unsigned int which, int num_ops,
int opcode, int flags,
struct ceph_snap_context *snapc,
u32 truncate_seq, u64 truncate_size,
bool use_mempool);
extern void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
struct ceph_osd_request *req);
extern void ceph_osdc_get_request(struct ceph_osd_request *req);
extern void ceph_osdc_put_request(struct ceph_osd_request *req);
extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
struct ceph_osd_request *req,
bool nofail);
extern void ceph_osdc_cancel_request(struct ceph_osd_request *req);
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 void ceph_osdc_flush_notifies(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
