staging/lustre/llite: merge lclient.h into llite/vvp_internal.h

 * super-class definitions.

 */

#include "lu_object.h"

#include <linux/atomic.h>

#include "linux/lustre_compat25.h"

#include <linux/mutex.h>

#include <linux/radix-tree.h>

#include <linux/spinlock.h>

#include <linux/wait.h>

struct inode;

			 const struct cl_lock_descr *descr);

/* @} helper */

/**

 * Data structure managing a client's cached pages. A count of

 * "unstable" pages is maintained, and an LRU of clean pages is

 * maintained. "unstable" pages are pages pinned by the ptlrpc

 * layer for recovery purposes.

 */

struct cl_client_cache {

	/**

	 * # of users (OSCs)

	 */

	atomic_t		ccc_users;

	/**

	 * # of threads are doing shrinking

	 */

	unsigned int		ccc_lru_shrinkers;

	/**

	 * # of LRU entries available

	 */

	atomic_t		ccc_lru_left;

	/**

	 * List of entities(OSCs) for this LRU cache

	 */

	struct list_head	ccc_lru;

	/**

	 * Max # of LRU entries

	 */

	unsigned long		ccc_lru_max;

	/**

	 * Lock to protect ccc_lru list

	 */

	spinlock_t		ccc_lru_lock;

};

/** @} cl_page */

/** \defgroup cl_lock cl_lock

/*

 * GPL HEADER START

 *

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 only,

 * as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful, but

 * WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * General Public License version 2 for more details (a copy is included

 * in the LICENSE file that accompanied this code).

 *

 * You should have received a copy of the GNU General Public License

 * version 2 along with this program; If not, see

 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf

 *

 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 *

 * GPL HEADER END

 */

/*

 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.

 * Use is subject to license terms.

 *

 * Copyright (c) 2011, 2012, Intel Corporation.

 */

/*

 * This file is part of Lustre, http://www.lustre.org/

 * Lustre is a trademark of Sun Microsystems, Inc.

 *

 * Definitions shared between vvp and liblustre, and other clients in the

 * future.

 *

 *   Author: Oleg Drokin <oleg.drokin@sun.com>

 *   Author: Nikita Danilov <nikita.danilov@sun.com>

 */

#ifndef LCLIENT_H

#define LCLIENT_H

blkcnt_t dirty_cnt(struct inode *inode);

int cl_glimpse_size0(struct inode *inode, int agl);

int cl_glimpse_lock(const struct lu_env *env, struct cl_io *io,

		    struct inode *inode, struct cl_object *clob, int agl);

static inline int cl_glimpse_size(struct inode *inode)

{

	return cl_glimpse_size0(inode, 0);

}

static inline int cl_agl(struct inode *inode)

{

	return cl_glimpse_size0(inode, 1);

}

/**

 * Locking policy for setattr.

 */

enum ccc_setattr_lock_type {

	/** Locking is done by server */

	SETATTR_NOLOCK,

	/** Extent lock is enqueued */

	SETATTR_EXTENT_LOCK,

	/** Existing local extent lock is used */

	SETATTR_MATCH_LOCK

};

/**

 * IO state private to vvp or slp layers.

 */

struct ccc_io {

	/** super class */

	struct cl_io_slice     cui_cl;

	struct cl_io_lock_link cui_link;

	/**

	 * I/O vector information to or from which read/write is going.

	 */

	struct iov_iter *cui_iter;

	/**

	 * Total size for the left IO.

	 */

	size_t cui_tot_count;

	union {

		struct {

			enum ccc_setattr_lock_type cui_local_lock;

		} setattr;

		struct {

			struct cl_page_list cui_queue;

			unsigned long cui_written;

			int cui_from;

			int cui_to;

		} write;

	} u;

	/**

	 * Layout version when this IO is initialized

	 */

	__u32		cui_layout_gen;

	/**

	 * File descriptor against which IO is done.

	 */

	struct ll_file_data *cui_fd;

	struct kiocb *cui_iocb;

};

/**

 * True, if \a io is a normal io, False for splice_{read,write}.

 * must be implemented in arch specific code.

 */

int cl_is_normalio(const struct lu_env *env, const struct cl_io *io);

extern struct lu_context_key ccc_key;

extern struct lu_context_key ccc_session_key;

struct ccc_thread_info {

	struct cl_lock		cti_lock;

	struct cl_lock_descr cti_descr;

	struct cl_io	 cti_io;

	struct cl_attr       cti_attr;

};

static inline struct ccc_thread_info *ccc_env_info(const struct lu_env *env)

{

	struct ccc_thread_info      *info;

	info = lu_context_key_get(&env->le_ctx, &ccc_key);

	LASSERT(info);

	return info;

}

static inline struct cl_lock *ccc_env_lock(const struct lu_env *env)

{

	struct cl_lock *lock = &ccc_env_info(env)->cti_lock;

	memset(lock, 0, sizeof(*lock));

	return lock;

}

static inline struct cl_attr *ccc_env_thread_attr(const struct lu_env *env)

{

	struct cl_attr *attr = &ccc_env_info(env)->cti_attr;

	memset(attr, 0, sizeof(*attr));

	return attr;

}

static inline struct cl_io *ccc_env_thread_io(const struct lu_env *env)

{

	struct cl_io *io = &ccc_env_info(env)->cti_io;

	memset(io, 0, sizeof(*io));

	return io;

}

struct ccc_session {

	struct ccc_io cs_ios;

};

static inline struct ccc_session *ccc_env_session(const struct lu_env *env)

{

	struct ccc_session *ses;

	ses = lu_context_key_get(env->le_ses, &ccc_session_key);

	LASSERT(ses);

	return ses;

}

static inline struct ccc_io *ccc_env_io(const struct lu_env *env)

{

	return &ccc_env_session(env)->cs_ios;

}

/**

 * ccc-private object state.

 */

struct ccc_object {

	struct cl_object_header cob_header;

	struct cl_object	cob_cl;

	struct inode	   *cob_inode;

	/**

	 * A list of dirty pages pending IO in the cache. Used by

	 * SOM. Protected by ll_inode_info::lli_lock.

	 *

	 * \see ccc_page::cpg_pending_linkage

	 */

	struct list_head	     cob_pending_list;

	/**

	 * Access this counter is protected by inode->i_sem. Now that

	 * the lifetime of transient pages must be covered by inode sem,

	 * we don't need to hold any lock..

	 */

	int		     cob_transient_pages;

	/**

	 * Number of outstanding mmaps on this file.

	 *

	 * \see ll_vm_open(), ll_vm_close().

	 */

	atomic_t	    cob_mmap_cnt;

	/**

	 * various flags

	 * cob_discard_page_warned

	 *     if pages belonging to this object are discarded when a client

	 * is evicted, some debug info will be printed, this flag will be set

	 * during processing the first discarded page, then avoid flooding

	 * debug message for lots of discarded pages.

	 *

	 * \see ll_dirty_page_discard_warn.

	 */

	unsigned int		cob_discard_page_warned:1;

};

/**

 * ccc-private page state.

 */

struct ccc_page {

	struct cl_page_slice cpg_cl;

	int		  cpg_defer_uptodate;

	int		  cpg_ra_used;

	int		  cpg_write_queued;

	/**

	 * Non-empty iff this page is already counted in

	 * ccc_object::cob_pending_list. Protected by

	 * ccc_object::cob_pending_guard. This list is only used as a flag,

	 * that is, never iterated through, only checked for list_empty(), but

	 * having a list is useful for debugging.

	 */

	struct list_head	   cpg_pending_linkage;

	/** VM page */

	struct page	  *cpg_page;

};

static inline struct ccc_page *cl2ccc_page(const struct cl_page_slice *slice)

{

	return container_of(slice, struct ccc_page, cpg_cl);

}

static inline pgoff_t ccc_index(struct ccc_page *ccc)

{

	return ccc->cpg_cl.cpl_index;

}

struct ccc_device {

	struct cl_device    cdv_cl;

	struct super_block *cdv_sb;

	struct cl_device   *cdv_next;

};

struct ccc_lock {

	struct cl_lock_slice clk_cl;

};

struct ccc_req {

	struct cl_req_slice  crq_cl;

};

void *ccc_key_init	(const struct lu_context *ctx,

			   struct lu_context_key *key);

void  ccc_key_fini	(const struct lu_context *ctx,

			   struct lu_context_key *key, void *data);

void *ccc_session_key_init(const struct lu_context *ctx,

			   struct lu_context_key *key);

void  ccc_session_key_fini(const struct lu_context *ctx,

			   struct lu_context_key *key, void *data);

int	      ccc_device_init  (const struct lu_env *env,

				   struct lu_device *d,

				   const char *name, struct lu_device *next);

struct lu_device *ccc_device_fini (const struct lu_env *env,

				   struct lu_device *d);

struct lu_device *ccc_device_alloc(const struct lu_env *env,

				   struct lu_device_type *t,

				   struct lustre_cfg *cfg,

				   const struct lu_device_operations *luops,

				   const struct cl_device_operations *clops);

struct lu_device *ccc_device_free (const struct lu_env *env,

				   struct lu_device *d);

struct lu_object *ccc_object_alloc(const struct lu_env *env,

				   const struct lu_object_header *hdr,

				   struct lu_device *dev,

				   const struct cl_object_operations *clops,

				   const struct lu_object_operations *luops);

int ccc_req_init(const struct lu_env *env, struct cl_device *dev,

		 struct cl_req *req);

void ccc_umount(const struct lu_env *env, struct cl_device *dev);

int ccc_global_init(struct lu_device_type *device_type);

void ccc_global_fini(struct lu_device_type *device_type);

int ccc_object_init0(const struct lu_env *env, struct ccc_object *vob,

		     const struct cl_object_conf *conf);

int ccc_object_init(const struct lu_env *env, struct lu_object *obj,

		    const struct lu_object_conf *conf);

void ccc_object_free(const struct lu_env *env, struct lu_object *obj);

int ccc_lock_init(const struct lu_env *env, struct cl_object *obj,

		  struct cl_lock *lock, const struct cl_io *io,

		  const struct cl_lock_operations *lkops);

int ccc_object_glimpse(const struct lu_env *env,

		       const struct cl_object *obj, struct ost_lvb *lvb);

int ccc_fail(const struct lu_env *env, const struct cl_page_slice *slice);

int ccc_transient_page_prep(const struct lu_env *env,

			    const struct cl_page_slice *slice,

			    struct cl_io *io);

void ccc_lock_delete(const struct lu_env *env,

		     const struct cl_lock_slice *slice);

void ccc_lock_fini(const struct lu_env *env, struct cl_lock_slice *slice);

int ccc_lock_enqueue(const struct lu_env *env,

		     const struct cl_lock_slice *slice,

		     struct cl_io *io, struct cl_sync_io *anchor);

int ccc_io_one_lock_index(const struct lu_env *env, struct cl_io *io,

			  __u32 enqflags, enum cl_lock_mode mode,

			  pgoff_t start, pgoff_t end);

int ccc_io_one_lock(const struct lu_env *env, struct cl_io *io,

		    __u32 enqflags, enum cl_lock_mode mode,

		    loff_t start, loff_t end);

void ccc_io_end(const struct lu_env *env, const struct cl_io_slice *ios);

void ccc_io_advance(const struct lu_env *env, const struct cl_io_slice *ios,

		    size_t nob);

void ccc_io_update_iov(const struct lu_env *env, struct ccc_io *cio,

		       struct cl_io *io);

int ccc_prep_size(const struct lu_env *env, struct cl_object *obj,

		  struct cl_io *io, loff_t start, size_t count, int *exceed);

void ccc_req_completion(const struct lu_env *env,

			const struct cl_req_slice *slice, int ioret);

void ccc_req_attr_set(const struct lu_env *env,

		      const struct cl_req_slice *slice,

		      const struct cl_object *obj,

		      struct cl_req_attr *oa, u64 flags);

struct lu_device   *ccc2lu_dev      (struct ccc_device *vdv);

struct lu_object   *ccc2lu	  (struct ccc_object *vob);

struct ccc_device  *lu2ccc_dev      (const struct lu_device *d);

struct ccc_device  *cl2ccc_dev      (const struct cl_device *d);

struct ccc_object  *lu2ccc	  (const struct lu_object *obj);

struct ccc_object  *cl2ccc	  (const struct cl_object *obj);

struct ccc_lock    *cl2ccc_lock     (const struct cl_lock_slice *slice);

struct ccc_io      *cl2ccc_io       (const struct lu_env *env,

				     const struct cl_io_slice *slice);

struct ccc_req     *cl2ccc_req      (const struct cl_req_slice *slice);

struct page	 *cl2vm_page      (const struct cl_page_slice *slice);

struct inode       *ccc_object_inode(const struct cl_object *obj);

struct ccc_object  *cl_inode2ccc    (struct inode *inode);

int cl_setattr_ost(struct inode *inode, const struct iattr *attr);

int ccc_object_invariant(const struct cl_object *obj);

int cl_file_inode_init(struct inode *inode, struct lustre_md *md);

void cl_inode_fini(struct inode *inode);

int cl_local_size(struct inode *inode);

__u16 ll_dirent_type_get(struct lu_dirent *ent);

__u64 cl_fid_build_ino(const struct lu_fid *fid, int api32);

__u32 cl_fid_build_gen(const struct lu_fid *fid);

# define CLOBINVRNT(env, clob, expr)					\

	((void)sizeof(env), (void)sizeof(clob), (void)sizeof(!!(expr)))

int cl_init_ea_size(struct obd_export *md_exp, struct obd_export *dt_exp);

int cl_ocd_update(struct obd_device *host,

		  struct obd_device *watched,

		  enum obd_notify_event ev, void *owner, void *data);

struct ccc_grouplock {

	struct lu_env   *cg_env;

	struct cl_io    *cg_io;

	struct cl_lock  *cg_lock;

	unsigned long    cg_gid;

};

int  cl_get_grouplock(struct cl_object *obj, unsigned long gid, int nonblock,

		      struct ccc_grouplock *cg);

void cl_put_grouplock(struct ccc_grouplock *cg);

/**

 * New interfaces to get and put lov_stripe_md from lov layer. This violates

 * layering because lov_stripe_md is supposed to be a private data in lov.

 *

 * NB: If you find you have to use these interfaces for your new code, please

 * think about it again. These interfaces may be removed in the future for

 * better layering.

 */

struct lov_stripe_md *lov_lsm_get(struct cl_object *clobj);

void lov_lsm_put(struct cl_object *clobj, struct lov_stripe_md *lsm);

int lov_read_and_clear_async_rc(struct cl_object *clob);

struct lov_stripe_md *ccc_inode_lsm_get(struct inode *inode);

void ccc_inode_lsm_put(struct inode *inode, struct lov_stripe_md *lsm);

/**

 * Data structure managing a client's cached clean pages. An LRU of

 * pages is maintained, along with other statistics.

 */

struct cl_client_cache {

	atomic_t	ccc_users;    /* # of users (OSCs) of this data */

	struct list_head	ccc_lru;      /* LRU list of cached clean pages */

	spinlock_t	ccc_lru_lock; /* lock for list */

	atomic_t	ccc_lru_left; /* # of LRU entries available */

	unsigned long	ccc_lru_max;  /* Max # of LRU entries possible */

	unsigned int	ccc_lru_shrinkers; /* # of threads reclaiming */

};

#endif /*LCLIENT_H */

#include <linux/file.h>

#include "../include/cl_object.h"

#include "../include/lclient.h"

#include "../llite/llite_internal.h"

static const struct cl_lock_descr whole_file = {

#include "../include/lustre_mdc.h"

#include "../include/cl_object.h"

#include "../include/lclient.h"

#include "../llite/llite_internal.h"

static const struct cl_req_operations ccc_req_ops;

#include "../include/obd_support.h"

#include "../include/obd.h"

#include "../include/cl_object.h"

#include "../include/lclient.h"

#include "vvp_internal.h"

#include "../include/lustre_lite.h"

/* Initialize the default and maximum LOV EA and cookie sizes.  This allows