Initial import

1 files changed, 377 insertions, 0 deletions

diff --git a/include/linux/ceph/osd_client.h b/include/linux/ceph/osd_client.h
new file mode 100644
index 000000000..61b19c46b
--- /dev/null
+++ b/include/linux/ceph/osd_client.h
@@ -0,0 +1,377 @@
+#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;
+struct ceph_authorizer;
+
+/*
+ * completion callback for async writepages
+ */
+typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *,
+				     struct ceph_msg *);
+typedef void (*ceph_osdc_unsafe_callback_t)(struct ceph_osd_request *, bool);
+
+/* 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	3
+
+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 payload_len;
+	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;
+			__u8 argc;
+		} 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;
+	};
+};
+
+/* 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_item;
+	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_msg  *r_request, *r_reply;
+	int               r_flags;     /* any additional flags for the osd */
+	u32               r_sent;      /* >0 if r_request is sending/sent */
+
+	/* request osd ops array  */
+	unsigned int		r_num_ops;
+	struct ceph_osd_req_op	r_ops[CEPH_OSD_MAX_OP];
+
+	/* 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;
+	bool              r_paused;
+	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;
+	ceph_osdc_unsafe_callback_t r_unsafe_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 */
+
+	struct ceph_object_locator r_base_oloc;
+	struct ceph_object_id r_base_oid;
+	struct ceph_object_locator r_target_oloc;
+	struct ceph_object_id r_target_oid;
+
+	u64               r_snapid;
+	unsigned long     r_stamp;            /* send OR check time */
+
+	struct ceph_snap_context *r_snapc;    /* snap context for writes */
+};
+
+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    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;
+};
+
+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);
+
+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 struct ceph_osd_data *osd_req_op_extent_osd_data(
+					struct ceph_osd_request *osd_req,
+					unsigned int which);
+extern struct ceph_osd_data *osd_req_op_cls_response_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);
+
+extern void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
+				    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,
+				      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
+