drivers/staging/lustre/lustre/lov/lov_internal.h - nest-learning-thermostat/6.0/linux-imx-4.9.88 - Git at Google

 /*
  * 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.gnu.org/licenses/gpl-2.0.html
  *
  * GPL HEADER END
  */
 /*
  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  *
  * Copyright (c) 2011, 2015, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
  * Lustre is a trademark of Sun Microsystems, Inc.
  */

 #ifndef LOV_INTERNAL_H
 #define LOV_INTERNAL_H

 #include "../include/obd_class.h"
 #include "../include/lustre/lustre_user.h"

 /* lov_do_div64(a, b) returns a % b, and a = a / b.
  * The 32-bit code is LOV-specific due to knowing about stripe limits in
  * order to reduce the divisor to a 32-bit number.  If the divisor is
  * already a 32-bit value the compiler handles this directly.
  */
 #if BITS_PER_LONG == 64
 # define lov_do_div64(n, base) ({					\
 	uint64_t __base = (base);					\
 	uint64_t __rem;							\
 	__rem = ((uint64_t)(n)) % __base;				\
 	(n) = ((uint64_t)(n)) / __base;					\
 	__rem;								\
 })
 #elif BITS_PER_LONG == 32
 # define lov_do_div64(n, base) ({					\
 	uint64_t __rem;							\
 	if ((sizeof(base) > 4) && (((base) & 0xffffffff00000000ULL) != 0)) {  \
 		int __remainder;					      \
 		LASSERTF(!((base) & (LOV_MIN_STRIPE_SIZE - 1)), "64 bit lov " \
 			 "division %llu / %llu\n", (n), (uint64_t)(base));    \
 		__remainder = (n) & (LOV_MIN_STRIPE_SIZE - 1);		\
 		(n) >>= LOV_MIN_STRIPE_BITS;				\
 		__rem = do_div(n, (base) >> LOV_MIN_STRIPE_BITS);	\
 		__rem <<= LOV_MIN_STRIPE_BITS;				\
 		__rem += __remainder;					\
 	} else {							\
 		__rem = do_div(n, base);				\
 	}								\
 	__rem;								\
 })
 #endif

 #define pool_tgt_size(p)	((p)->pool_obds.op_size)
 #define pool_tgt_count(p)	((p)->pool_obds.op_count)
 #define pool_tgt_array(p)	((p)->pool_obds.op_array)
 #define pool_tgt_rw_sem(p)	((p)->pool_obds.op_rw_sem)

 struct pool_desc {
 	char			 pool_name[LOV_MAXPOOLNAME + 1];
 	struct ost_pool		 pool_obds;
 	atomic_t		 pool_refcount;
 	struct hlist_node	 pool_hash;		/* access by poolname */
 	struct list_head	 pool_list;		/* serial access */
 	struct dentry		*pool_debugfs_entry;	/* file in debugfs */
 	struct obd_device	*pool_lobd;		/* owner */
 };

 struct lov_request {
 	struct obd_info	  rq_oi;
 	struct lov_request_set  *rq_rqset;

 	struct list_head	       rq_link;

 	int		      rq_idx;	/* index in lov->tgts array */
 	int		      rq_stripe;     /* stripe number */
 	int		      rq_complete;
 	int		      rq_rc;

 	u32		      rq_oabufs;
 	u32		      rq_pgaidx;
 };

 struct lov_request_set {
 	struct obd_info			*set_oi;
 	atomic_t			set_refcount;
 	struct obd_export		*set_exp;
 	/* XXX: There is @set_exp already, however obd_statfs gets obd_device
 	 * only.
 	 */
 	struct obd_device		*set_obd;
 	int				set_count;
 	atomic_t			set_completes;
 	atomic_t			set_success;
 	atomic_t			set_finish_checked;
 	struct llog_cookie		*set_cookies;
 	int				set_cookie_sent;
 	struct list_head			set_list;
 	wait_queue_head_t			set_waitq;
 };

 extern struct kmem_cache *lov_oinfo_slab;

 extern struct lu_kmem_descr lov_caches[];

 void lov_finish_set(struct lov_request_set *set);

 static inline void lov_put_reqset(struct lov_request_set *set)
 {
 	if (atomic_dec_and_test(&set->set_refcount))
 		lov_finish_set(set);
 }

 #define lov_uuid2str(lv, index) \
 	(char *)((lv)->lov_tgts[index]->ltd_uuid.uuid)

 /* lov_merge.c */
 void lov_merge_attrs(struct obdo *tgt, struct obdo *src, u64 valid,
 		     struct lov_stripe_md *lsm, int stripeno, int *set);
 int lov_merge_lvb_kms(struct lov_stripe_md *lsm,
 		      struct ost_lvb *lvb, __u64 *kms_place);

 /* lov_offset.c */
 u64 lov_stripe_size(struct lov_stripe_md *lsm, u64 ost_size, int stripeno);
 int lov_stripe_offset(struct lov_stripe_md *lsm, u64 lov_off,
 		      int stripeno, u64 *u64);
 u64 lov_size_to_stripe(struct lov_stripe_md *lsm, u64 file_size, int stripeno);
 int lov_stripe_intersects(struct lov_stripe_md *lsm, int stripeno,
 			  u64 start, u64 end,
 			  u64 *obd_start, u64 *obd_end);
 int lov_stripe_number(struct lov_stripe_md *lsm, u64 lov_off);
 pgoff_t lov_stripe_pgoff(struct lov_stripe_md *lsm, pgoff_t stripe_index,
 			 int stripe);

 /* lov_request.c */
 int lov_update_common_set(struct lov_request_set *set,
 			  struct lov_request *req, int rc);
 int lov_prep_getattr_set(struct obd_export *exp, struct obd_info *oinfo,
 			 struct lov_request_set **reqset);
 int lov_fini_getattr_set(struct lov_request_set *set);
 int lov_prep_setattr_set(struct obd_export *exp, struct obd_info *oinfo,
 			 struct obd_trans_info *oti,
 			 struct lov_request_set **reqset);
 int lov_update_setattr_set(struct lov_request_set *set,
 			   struct lov_request *req, int rc);
 int lov_fini_setattr_set(struct lov_request_set *set);
 int lov_prep_statfs_set(struct obd_device *obd, struct obd_info *oinfo,
 			struct lov_request_set **reqset);
 int lov_fini_statfs(struct obd_device *obd, struct obd_statfs *osfs,
 		    int success);
 int lov_fini_statfs_set(struct lov_request_set *set);
 int lov_statfs_interpret(struct ptlrpc_request_set *rqset, void *data, int rc);

 /* lov_obd.c */
 void lov_stripe_lock(struct lov_stripe_md *md);
 void lov_stripe_unlock(struct lov_stripe_md *md);
 void lov_fix_desc(struct lov_desc *desc);
 void lov_fix_desc_stripe_size(__u64 *val);
 void lov_fix_desc_stripe_count(__u32 *val);
 void lov_fix_desc_pattern(__u32 *val);
 void lov_fix_desc_qos_maxage(__u32 *val);
 __u16 lov_get_stripecnt(struct lov_obd *lov, __u32 magic, __u16 stripe_count);
 int lov_connect_obd(struct obd_device *obd, __u32 index, int activate,
 		    struct obd_connect_data *data);
 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg);
 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
 			    __u32 *indexp, int *genp);
 int lov_del_target(struct obd_device *obd, __u32 index,
 		   struct obd_uuid *uuidp, int gen);

 /* lov_pack.c */
 int lov_packmd(struct obd_export *exp, struct lov_mds_md **lmm,
 	       struct lov_stripe_md *lsm);
 int lov_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
 		 struct lov_mds_md *lmm, int lmm_bytes);
 int lov_alloc_memmd(struct lov_stripe_md **lsmp, __u16 stripe_count,
 		    int pattern, int magic);
 int lov_free_memmd(struct lov_stripe_md **lsmp);

 void lov_dump_lmm_v1(int level, struct lov_mds_md_v1 *lmm);
 void lov_dump_lmm_v3(int level, struct lov_mds_md_v3 *lmm);
 void lov_dump_lmm_common(int level, void *lmmp);

 /* lov_ea.c */
 struct lov_stripe_md *lsm_alloc_plain(__u16 stripe_count, int *size);
 void lsm_free_plain(struct lov_stripe_md *lsm);
 void dump_lsm(unsigned int level, const struct lov_stripe_md *lsm);

 /* lproc_lov.c */
 extern const struct file_operations lov_proc_target_fops;
 void lprocfs_lov_init_vars(struct lprocfs_static_vars *lvars);

 /* lov_cl.c */
 extern struct lu_device_type lov_device_type;

 /* pools */
 extern struct cfs_hash_ops pool_hash_operations;
 /* ost_pool methods */
 int lov_ost_pool_init(struct ost_pool *op, unsigned int count);
 int lov_ost_pool_extend(struct ost_pool *op, unsigned int min_count);
 int lov_ost_pool_add(struct ost_pool *op, __u32 idx, unsigned int min_count);
 int lov_ost_pool_remove(struct ost_pool *op, __u32 idx);
 int lov_ost_pool_free(struct ost_pool *op);

 /* high level pool methods */
 int lov_pool_new(struct obd_device *obd, char *poolname);
 int lov_pool_del(struct obd_device *obd, char *poolname);
 int lov_pool_add(struct obd_device *obd, char *poolname, char *ostname);
 int lov_pool_remove(struct obd_device *obd, char *poolname, char *ostname);
 void lov_pool_putref(struct pool_desc *pool);

 static inline struct lov_stripe_md *lsm_addref(struct lov_stripe_md *lsm)
 {
 	LASSERT(atomic_read(&lsm->lsm_refc) > 0);
 	atomic_inc(&lsm->lsm_refc);
 	return lsm;
 }

 static inline bool lov_oinfo_is_dummy(const struct lov_oinfo *loi)
 {
 	if (unlikely(loi->loi_oi.oi.oi_id == 0 &&
 		     loi->loi_oi.oi.oi_seq == 0 &&
 		     loi->loi_ost_idx == 0 &&
 		     loi->loi_ost_gen == 0))
 		return true;

 	return false;
 }

 #endif
	/*
	* 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.gnu.org/licenses/gpl-2.0.html
	*
	* GPL HEADER END
	*/
	/*
	* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
	* Use is subject to license terms.
	*
	* Copyright (c) 2011, 2015, Intel Corporation.
	*/
	/*
	* This file is part of Lustre, http://www.lustre.org/
	* Lustre is a trademark of Sun Microsystems, Inc.
	*/

	#ifndef LOV_INTERNAL_H
	#define LOV_INTERNAL_H

	#include "../include/obd_class.h"
	#include "../include/lustre/lustre_user.h"

	/* lov_do_div64(a, b) returns a % b, and a = a / b.
	* The 32-bit code is LOV-specific due to knowing about stripe limits in
	* order to reduce the divisor to a 32-bit number. If the divisor is
	* already a 32-bit value the compiler handles this directly.
	*/
	#if BITS_PER_LONG == 64
	# define lov_do_div64(n, base) ({ \
	uint64_t __base = (base); \
	uint64_t __rem; \
	__rem = ((uint64_t)(n)) % __base; \
	(n) = ((uint64_t)(n)) / __base; \
	__rem; \
	})
	#elif BITS_PER_LONG == 32
	# define lov_do_div64(n, base) ({ \
	uint64_t __rem; \
	if ((sizeof(base) > 4) && (((base) & 0xffffffff00000000ULL) != 0)) { \
	int __remainder; \
	LASSERTF(!((base) & (LOV_MIN_STRIPE_SIZE - 1)), "64 bit lov " \
	"division %llu / %llu\n", (n), (uint64_t)(base)); \
	__remainder = (n) & (LOV_MIN_STRIPE_SIZE - 1); \
	(n) >>= LOV_MIN_STRIPE_BITS; \
	__rem = do_div(n, (base) >> LOV_MIN_STRIPE_BITS); \
	__rem <<= LOV_MIN_STRIPE_BITS; \
	__rem += __remainder; \
	} else { \
	__rem = do_div(n, base); \
	} \
	__rem; \
	})
	#endif

	#define pool_tgt_size(p) ((p)->pool_obds.op_size)
	#define pool_tgt_count(p) ((p)->pool_obds.op_count)
	#define pool_tgt_array(p) ((p)->pool_obds.op_array)
	#define pool_tgt_rw_sem(p) ((p)->pool_obds.op_rw_sem)

	struct pool_desc {
	char pool_name[LOV_MAXPOOLNAME + 1];
	struct ost_pool pool_obds;
	atomic_t pool_refcount;
	struct hlist_node pool_hash; /* access by poolname */
	struct list_head pool_list; /* serial access */
	struct dentry pool_debugfs_entry; / file in debugfs */
	struct obd_device pool_lobd; / owner */
	};

	struct lov_request {
	struct obd_info rq_oi;
	struct lov_request_set *rq_rqset;

	struct list_head rq_link;

	int rq_idx; /* index in lov->tgts array */
	int rq_stripe; /* stripe number */
	int rq_complete;
	int rq_rc;

	u32 rq_oabufs;
	u32 rq_pgaidx;
	};

	struct lov_request_set {
	struct obd_info *set_oi;
	atomic_t set_refcount;
	struct obd_export *set_exp;
	/* XXX: There is @set_exp already, however obd_statfs gets obd_device
	* only.
	*/
	struct obd_device *set_obd;
	int set_count;
	atomic_t set_completes;
	atomic_t set_success;
	atomic_t set_finish_checked;
	struct llog_cookie *set_cookies;
	int set_cookie_sent;
	struct list_head set_list;
	wait_queue_head_t set_waitq;
	};

	extern struct kmem_cache *lov_oinfo_slab;

	extern struct lu_kmem_descr lov_caches[];

	void lov_finish_set(struct lov_request_set *set);

	static inline void lov_put_reqset(struct lov_request_set *set)
	{
	if (atomic_dec_and_test(&set->set_refcount))
	lov_finish_set(set);
	}

	#define lov_uuid2str(lv, index) \
	(char *)((lv)->lov_tgts[index]->ltd_uuid.uuid)

	/* lov_merge.c */
	void lov_merge_attrs(struct obdo tgt, struct obdo src, u64 valid,
	struct lov_stripe_md lsm, int stripeno, int set);
	int lov_merge_lvb_kms(struct lov_stripe_md *lsm,
	struct ost_lvb lvb, __u64 kms_place);

	/* lov_offset.c */
	u64 lov_stripe_size(struct lov_stripe_md *lsm, u64 ost_size, int stripeno);
	int lov_stripe_offset(struct lov_stripe_md *lsm, u64 lov_off,
	int stripeno, u64 *u64);
	u64 lov_size_to_stripe(struct lov_stripe_md *lsm, u64 file_size, int stripeno);
	int lov_stripe_intersects(struct lov_stripe_md *lsm, int stripeno,
	u64 start, u64 end,
	u64 obd_start, u64 obd_end);
	int lov_stripe_number(struct lov_stripe_md *lsm, u64 lov_off);
	pgoff_t lov_stripe_pgoff(struct lov_stripe_md *lsm, pgoff_t stripe_index,
	int stripe);

	/* lov_request.c */
	int lov_update_common_set(struct lov_request_set *set,
	struct lov_request *req, int rc);
	int lov_prep_getattr_set(struct obd_export exp, struct obd_info oinfo,
	struct lov_request_set **reqset);
	int lov_fini_getattr_set(struct lov_request_set *set);
	int lov_prep_setattr_set(struct obd_export exp, struct obd_info oinfo,
	struct obd_trans_info *oti,
	struct lov_request_set **reqset);
	int lov_update_setattr_set(struct lov_request_set *set,
	struct lov_request *req, int rc);
	int lov_fini_setattr_set(struct lov_request_set *set);
	int lov_prep_statfs_set(struct obd_device obd, struct obd_info oinfo,
	struct lov_request_set **reqset);
	int lov_fini_statfs(struct obd_device obd, struct obd_statfs osfs,
	int success);
	int lov_fini_statfs_set(struct lov_request_set *set);
	int lov_statfs_interpret(struct ptlrpc_request_set rqset, void data, int rc);

	/* lov_obd.c */
	void lov_stripe_lock(struct lov_stripe_md *md);
	void lov_stripe_unlock(struct lov_stripe_md *md);
	void lov_fix_desc(struct lov_desc *desc);
	void lov_fix_desc_stripe_size(__u64 *val);
	void lov_fix_desc_stripe_count(__u32 *val);
	void lov_fix_desc_pattern(__u32 *val);
	void lov_fix_desc_qos_maxage(__u32 *val);
	__u16 lov_get_stripecnt(struct lov_obd *lov, __u32 magic, __u16 stripe_count);
	int lov_connect_obd(struct obd_device *obd, __u32 index, int activate,
	struct obd_connect_data *data);
	int lov_setup(struct obd_device obd, struct lustre_cfg lcfg);
	int lov_process_config_base(struct obd_device obd, struct lustre_cfg lcfg,
	__u32 indexp, int genp);
	int lov_del_target(struct obd_device *obd, __u32 index,
	struct obd_uuid *uuidp, int gen);

	/* lov_pack.c */
	int lov_packmd(struct obd_export exp, struct lov_mds_md *lmm,
	struct lov_stripe_md *lsm);
	int lov_unpackmd(struct obd_export exp, struct lov_stripe_md *lsmp,
	struct lov_mds_md *lmm, int lmm_bytes);
	int lov_alloc_memmd(struct lov_stripe_md **lsmp, __u16 stripe_count,
	int pattern, int magic);
	int lov_free_memmd(struct lov_stripe_md **lsmp);

	void lov_dump_lmm_v1(int level, struct lov_mds_md_v1 *lmm);
	void lov_dump_lmm_v3(int level, struct lov_mds_md_v3 *lmm);
	void lov_dump_lmm_common(int level, void *lmmp);

	/* lov_ea.c */
	struct lov_stripe_md lsm_alloc_plain(__u16 stripe_count, int size);
	void lsm_free_plain(struct lov_stripe_md *lsm);
	void dump_lsm(unsigned int level, const struct lov_stripe_md *lsm);

	/* lproc_lov.c */
	extern const struct file_operations lov_proc_target_fops;
	void lprocfs_lov_init_vars(struct lprocfs_static_vars *lvars);

	/* lov_cl.c */
	extern struct lu_device_type lov_device_type;

	/* pools */
	extern struct cfs_hash_ops pool_hash_operations;
	/* ost_pool methods */
	int lov_ost_pool_init(struct ost_pool *op, unsigned int count);
	int lov_ost_pool_extend(struct ost_pool *op, unsigned int min_count);
	int lov_ost_pool_add(struct ost_pool *op, __u32 idx, unsigned int min_count);
	int lov_ost_pool_remove(struct ost_pool *op, __u32 idx);
	int lov_ost_pool_free(struct ost_pool *op);

	/* high level pool methods */
	int lov_pool_new(struct obd_device obd, char poolname);
	int lov_pool_del(struct obd_device obd, char poolname);
	int lov_pool_add(struct obd_device obd, char poolname, char *ostname);
	int lov_pool_remove(struct obd_device obd, char poolname, char *ostname);
	void lov_pool_putref(struct pool_desc *pool);

	static inline struct lov_stripe_md lsm_addref(struct lov_stripe_md lsm)
	{
	LASSERT(atomic_read(&lsm->lsm_refc) > 0);
	atomic_inc(&lsm->lsm_refc);
	return lsm;
	}

	static inline bool lov_oinfo_is_dummy(const struct lov_oinfo *loi)
	{
	if (unlikely(loi->loi_oi.oi.oi_id == 0 &&
	loi->loi_oi.oi.oi_seq == 0 &&
	loi->loi_ost_idx == 0 &&
	loi->loi_ost_gen == 0))
	return true;

	return false;
	}

	#endif