ceph: factor out libceph from Ceph file system

This factors out protocol and low-level storage parts of ceph into a
separate libceph module living in net/ceph and include/linux/ceph.  This
is mostly a matter of moving files around.  However, a few key pieces
of the interface change as well:

 - ceph_client becomes ceph_fs_client and ceph_client, where the latter
   captures the mon and osd clients, and the fs_client gets the mds client
   and file system specific pieces.
 - Mount option parsing and debugfs setup is correspondingly broken into
   two pieces.
 - The mon client gets a generic handler callback for otherwise unknown
   messages (mds map, in this case).
 - The basic supported/required feature bits can be expanded (and are by
   ceph_fs_client).

No functional change, aside from some subtle error handling cases that got
cleaned up in the refactoring process.

Signed-off-by: Sage Weil <sage@newdream.net>

1 files changed, 0 insertions, 233 deletions

diff --git a/fs/ceph/osd_client.h b/fs/ceph/osd_client.h
deleted file mode 100644
index 65c9c56..0000000
--- a/fs/ceph/osd_client.h
+++ /dev/null
@@ -1,233 +0,0 @@
-#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 "types.h"
-#include "osdmap.h"
-#include "messenger.h"
-
-struct ceph_msg;
-struct ceph_snap_context;
-struct ceph_osd_request;
-struct ceph_osd_client;
-struct ceph_authorizer;
-struct ceph_pagelist;
-
-/*
- * 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_osd_lru;
-	struct ceph_authorizer *o_authorizer;
-	void *o_authorizer_buf, *o_authorizer_reply_buf;
-	size_t o_authorizer_buf_len, o_authorizer_reply_buf_len;
-	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 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;
-
-	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 */
-
-	char              r_oid[40];          /* object name */
-	int               r_oid_len;
-	unsigned long     r_stamp;            /* send OR check time */
-	bool              r_resend;           /* msg send failed, needs retry */
-
-	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) */
-	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_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;	      /* pending requests lru */
-	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;
-};
-
-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;
-	};
-	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 void ceph_calc_raw_layout(struct ceph_osd_client *osdc,
-			struct ceph_file_layout *layout,
-			u64 snapid,
-			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,
-					       int flags,
-					       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 *plen,
-				    struct ceph_osd_req_op *src_ops,
-				    struct ceph_snap_context *snapc,
-				    struct timespec *mtime,
-				    const char *oid,
-				    int oid_len);
-
-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);
-
-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);
-
-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);
-
-#endif
-