| /* |
| * 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) 2012, Intel Corporation. |
| */ |
| /* |
| * This file is part of Lustre, http://www.lustre.org/ |
| * Lustre is a trademark of Sun Microsystems, Inc. |
| */ |
| /* |
| * This file is part of Lustre, http://www.lustre.org/ |
| * Lustre is a trademark of Sun Microsystems, Inc. |
| * |
| * Internal interfaces of OSC layer. |
| * |
| * Author: Nikita Danilov <nikita.danilov@sun.com> |
| * Author: Jinshan Xiong <jinshan.xiong@whamcloud.com> |
| */ |
| |
| #ifndef OSC_CL_INTERNAL_H |
| #define OSC_CL_INTERNAL_H |
| |
| # include <linux/libcfs/libcfs.h> |
| |
| #include <obd.h> |
| /* osc_build_res_name() */ |
| #include <obd_ost.h> |
| #include <cl_object.h> |
| #include <lclient.h> |
| #include "osc_internal.h" |
| |
| /** \defgroup osc osc |
| * @{ |
| */ |
| |
| struct osc_extent; |
| |
| /** |
| * State maintained by osc layer for each IO context. |
| */ |
| struct osc_io { |
| /** super class */ |
| struct cl_io_slice oi_cl; |
| /** true if this io is lockless. */ |
| int oi_lockless; |
| /** active extents, we know how many bytes is going to be written, |
| * so having an active extent will prevent it from being fragmented */ |
| struct osc_extent *oi_active; |
| /** partially truncated extent, we need to hold this extent to prevent |
| * page writeback from happening. */ |
| struct osc_extent *oi_trunc; |
| |
| struct obd_info oi_info; |
| struct obdo oi_oa; |
| struct osc_async_cbargs { |
| bool opc_rpc_sent; |
| int opc_rc; |
| struct completion opc_sync; |
| } oi_cbarg; |
| }; |
| |
| /** |
| * State of transfer for osc. |
| */ |
| struct osc_req { |
| struct cl_req_slice or_cl; |
| }; |
| |
| /** |
| * State maintained by osc layer for the duration of a system call. |
| */ |
| struct osc_session { |
| struct osc_io os_io; |
| }; |
| |
| #define OTI_PVEC_SIZE 64 |
| struct osc_thread_info { |
| struct ldlm_res_id oti_resname; |
| ldlm_policy_data_t oti_policy; |
| struct cl_lock_descr oti_descr; |
| struct cl_attr oti_attr; |
| struct lustre_handle oti_handle; |
| struct cl_page_list oti_plist; |
| struct cl_io oti_io; |
| struct cl_page *oti_pvec[OTI_PVEC_SIZE]; |
| }; |
| |
| struct osc_object { |
| struct cl_object oo_cl; |
| struct lov_oinfo *oo_oinfo; |
| /** |
| * True if locking against this stripe got -EUSERS. |
| */ |
| int oo_contended; |
| cfs_time_t oo_contention_time; |
| /** |
| * List of pages in transfer. |
| */ |
| struct list_head oo_inflight[CRT_NR]; |
| /** |
| * Lock, protecting ccc_object::cob_inflight, because a seat-belt is |
| * locked during take-off and landing. |
| */ |
| spinlock_t oo_seatbelt; |
| |
| /** |
| * used by the osc to keep track of what objects to build into rpcs. |
| * Protected by client_obd->cli_loi_list_lock. |
| */ |
| struct list_head oo_ready_item; |
| struct list_head oo_hp_ready_item; |
| struct list_head oo_write_item; |
| struct list_head oo_read_item; |
| |
| /** |
| * extent is a red black tree to manage (async) dirty pages. |
| */ |
| struct rb_root oo_root; |
| /** |
| * Manage write(dirty) extents. |
| */ |
| struct list_head oo_hp_exts; /* list of hp extents */ |
| struct list_head oo_urgent_exts; /* list of writeback extents */ |
| struct list_head oo_rpc_exts; |
| |
| struct list_head oo_reading_exts; |
| |
| atomic_t oo_nr_reads; |
| atomic_t oo_nr_writes; |
| |
| /** Protect extent tree. Will be used to protect |
| * oo_{read|write}_pages soon. */ |
| spinlock_t oo_lock; |
| }; |
| |
| static inline void osc_object_lock(struct osc_object *obj) |
| { |
| spin_lock(&obj->oo_lock); |
| } |
| |
| static inline int osc_object_trylock(struct osc_object *obj) |
| { |
| return spin_trylock(&obj->oo_lock); |
| } |
| |
| static inline void osc_object_unlock(struct osc_object *obj) |
| { |
| spin_unlock(&obj->oo_lock); |
| } |
| |
| static inline int osc_object_is_locked(struct osc_object *obj) |
| { |
| return spin_is_locked(&obj->oo_lock); |
| } |
| |
| /* |
| * Lock "micro-states" for osc layer. |
| */ |
| enum osc_lock_state { |
| OLS_NEW, |
| OLS_ENQUEUED, |
| OLS_UPCALL_RECEIVED, |
| OLS_GRANTED, |
| OLS_RELEASED, |
| OLS_BLOCKED, |
| OLS_CANCELLED |
| }; |
| |
| /** |
| * osc-private state of cl_lock. |
| * |
| * Interaction with DLM. |
| * |
| * CLIO enqueues all DLM locks through ptlrpcd (that is, in "async" mode). |
| * |
| * Once receive upcall is invoked, osc_lock remembers a handle of DLM lock in |
| * osc_lock::ols_handle and a pointer to that lock in osc_lock::ols_lock. |
| * |
| * This pointer is protected through a reference, acquired by |
| * osc_lock_upcall0(). Also, an additional reference is acquired by |
| * ldlm_lock_addref() call protecting the lock from cancellation, until |
| * osc_lock_unuse() releases it. |
| * |
| * Below is a description of how lock references are acquired and released |
| * inside of DLM. |
| * |
| * - When new lock is created and enqueued to the server (ldlm_cli_enqueue()) |
| * - ldlm_lock_create() |
| * - ldlm_lock_new(): initializes a lock with 2 references. One for |
| * the caller (released when reply from the server is received, or on |
| * error), and another for the hash table. |
| * - ldlm_lock_addref_internal(): protects the lock from cancellation. |
| * |
| * - When reply is received from the server (osc_enqueue_interpret()) |
| * - ldlm_cli_enqueue_fini() |
| * - LDLM_LOCK_PUT(): releases caller reference acquired by |
| * ldlm_lock_new(). |
| * - if (rc != 0) |
| * ldlm_lock_decref(): error case: matches ldlm_cli_enqueue(). |
| * - ldlm_lock_decref(): for async locks, matches ldlm_cli_enqueue(). |
| * |
| * - When lock is being cancelled (ldlm_lock_cancel()) |
| * - ldlm_lock_destroy() |
| * - LDLM_LOCK_PUT(): releases hash-table reference acquired by |
| * ldlm_lock_new(). |
| * |
| * osc_lock is detached from ldlm_lock by osc_lock_detach() that is called |
| * either when lock is cancelled (osc_lock_blocking()), or when locks is |
| * deleted without cancellation (e.g., from cl_locks_prune()). In the latter |
| * case ldlm lock remains in memory, and can be re-attached to osc_lock in the |
| * future. |
| */ |
| struct osc_lock { |
| struct cl_lock_slice ols_cl; |
| /** underlying DLM lock */ |
| struct ldlm_lock *ols_lock; |
| /** lock value block */ |
| struct ost_lvb ols_lvb; |
| /** DLM flags with which osc_lock::ols_lock was enqueued */ |
| __u64 ols_flags; |
| /** osc_lock::ols_lock handle */ |
| struct lustre_handle ols_handle; |
| struct ldlm_enqueue_info ols_einfo; |
| enum osc_lock_state ols_state; |
| |
| /** |
| * How many pages are using this lock for io, currently only used by |
| * read-ahead. If non-zero, the underlying dlm lock won't be cancelled |
| * during recovery to avoid deadlock. see bz16774. |
| * |
| * \see osc_page::ops_lock |
| * \see osc_page_addref_lock(), osc_page_putref_lock() |
| */ |
| atomic_t ols_pageref; |
| |
| /** |
| * true, if ldlm_lock_addref() was called against |
| * osc_lock::ols_lock. This is used for sanity checking. |
| * |
| * \see osc_lock::ols_has_ref |
| */ |
| unsigned ols_hold :1, |
| /** |
| * this is much like osc_lock::ols_hold, except that this bit is |
| * cleared _after_ reference in released in osc_lock_unuse(). This |
| * fine distinction is needed because: |
| * |
| * - if ldlm lock still has a reference, osc_ast_data_get() needs |
| * to return associated cl_lock (so that a flag is needed that is |
| * cleared after ldlm_lock_decref() returned), and |
| * |
| * - ldlm_lock_decref() can invoke blocking ast (for a |
| * LDLM_FL_CBPENDING lock), and osc_lock functions like |
| * osc_lock_cancel() called from there need to know whether to |
| * release lock reference (so that a flag is needed that is |
| * cleared before ldlm_lock_decref() is called). |
| */ |
| ols_has_ref:1, |
| /** |
| * inherit the lockless attribute from top level cl_io. |
| * If true, osc_lock_enqueue is able to tolerate the -EUSERS error. |
| */ |
| ols_locklessable:1, |
| /** |
| * set by osc_lock_use() to wait until blocking AST enters into |
| * osc_ldlm_blocking_ast0(), so that cl_lock mutex can be used for |
| * further synchronization. |
| */ |
| ols_ast_wait:1, |
| /** |
| * If the data of this lock has been flushed to server side. |
| */ |
| ols_flush:1, |
| /** |
| * if set, the osc_lock is a glimpse lock. For glimpse locks, we treat |
| * the EVAVAIL error as torerable, this will make upper logic happy |
| * to wait all glimpse locks to each OSTs to be completed. |
| * Glimpse lock converts to normal lock if the server lock is |
| * granted. |
| * Glimpse lock should be destroyed immediately after use. |
| */ |
| ols_glimpse:1, |
| /** |
| * For async glimpse lock. |
| */ |
| ols_agl:1; |
| /** |
| * IO that owns this lock. This field is used for a dead-lock |
| * avoidance by osc_lock_enqueue_wait(). |
| * |
| * XXX: unfortunately, the owner of a osc_lock is not unique, |
| * the lock may have multiple users, if the lock is granted and |
| * then matched. |
| */ |
| struct osc_io *ols_owner; |
| }; |
| |
| |
| /** |
| * Page state private for osc layer. |
| */ |
| struct osc_page { |
| struct cl_page_slice ops_cl; |
| /** |
| * Page queues used by osc to detect when RPC can be formed. |
| */ |
| struct osc_async_page ops_oap; |
| /** |
| * An offset within page from which next transfer starts. This is used |
| * by cl_page_clip() to submit partial page transfers. |
| */ |
| int ops_from; |
| /** |
| * An offset within page at which next transfer ends. |
| * |
| * \see osc_page::ops_from. |
| */ |
| int ops_to; |
| /** |
| * Boolean, true iff page is under transfer. Used for sanity checking. |
| */ |
| unsigned ops_transfer_pinned:1, |
| /** |
| * True for a `temporary page' created by read-ahead code, probably |
| * outside of any DLM lock. |
| */ |
| ops_temp:1, |
| /** |
| * in LRU? |
| */ |
| ops_in_lru:1, |
| /** |
| * Set if the page must be transferred with OBD_BRW_SRVLOCK. |
| */ |
| ops_srvlock:1; |
| union { |
| /** |
| * lru page list. ops_inflight and ops_lru are exclusive so |
| * that they can share the same data. |
| */ |
| struct list_head ops_lru; |
| /** |
| * Linkage into a per-osc_object list of pages in flight. For |
| * debugging. |
| */ |
| struct list_head ops_inflight; |
| }; |
| /** |
| * Thread that submitted this page for transfer. For debugging. |
| */ |
| task_t *ops_submitter; |
| /** |
| * Submit time - the time when the page is starting RPC. For debugging. |
| */ |
| cfs_time_t ops_submit_time; |
| |
| /** |
| * A lock of which we hold a reference covers this page. Only used by |
| * read-ahead: for a readahead page, we hold it's covering lock to |
| * prevent it from being canceled during recovery. |
| * |
| * \see osc_lock::ols_pageref |
| * \see osc_page_addref_lock(), osc_page_putref_lock(). |
| */ |
| struct cl_lock *ops_lock; |
| }; |
| |
| extern struct kmem_cache *osc_lock_kmem; |
| extern struct kmem_cache *osc_object_kmem; |
| extern struct kmem_cache *osc_thread_kmem; |
| extern struct kmem_cache *osc_session_kmem; |
| extern struct kmem_cache *osc_req_kmem; |
| extern struct kmem_cache *osc_extent_kmem; |
| |
| extern struct lu_device_type osc_device_type; |
| extern struct lu_context_key osc_key; |
| extern struct lu_context_key osc_session_key; |
| |
| #define OSC_FLAGS (ASYNC_URGENT|ASYNC_READY) |
| |
| int osc_lock_init(const struct lu_env *env, |
| struct cl_object *obj, struct cl_lock *lock, |
| const struct cl_io *io); |
| int osc_io_init (const struct lu_env *env, |
| struct cl_object *obj, struct cl_io *io); |
| int osc_req_init (const struct lu_env *env, struct cl_device *dev, |
| struct cl_req *req); |
| struct lu_object *osc_object_alloc(const struct lu_env *env, |
| const struct lu_object_header *hdr, |
| struct lu_device *dev); |
| int osc_page_init(const struct lu_env *env, struct cl_object *obj, |
| struct cl_page *page, struct page *vmpage); |
| |
| void osc_index2policy (ldlm_policy_data_t *policy, const struct cl_object *obj, |
| pgoff_t start, pgoff_t end); |
| int osc_lvb_print (const struct lu_env *env, void *cookie, |
| lu_printer_t p, const struct ost_lvb *lvb); |
| |
| void osc_page_submit(const struct lu_env *env, struct osc_page *opg, |
| enum cl_req_type crt, int brw_flags); |
| int osc_cancel_async_page(const struct lu_env *env, struct osc_page *ops); |
| int osc_set_async_flags(struct osc_object *obj, struct osc_page *opg, |
| obd_flag async_flags); |
| int osc_prep_async_page(struct osc_object *osc, struct osc_page *ops, |
| struct page *page, loff_t offset); |
| int osc_queue_async_io(const struct lu_env *env, struct cl_io *io, |
| struct osc_page *ops); |
| int osc_teardown_async_page(const struct lu_env *env, struct osc_object *obj, |
| struct osc_page *ops); |
| int osc_flush_async_page(const struct lu_env *env, struct cl_io *io, |
| struct osc_page *ops); |
| int osc_queue_sync_pages(const struct lu_env *env, struct osc_object *obj, |
| struct list_head *list, int cmd, int brw_flags); |
| int osc_cache_truncate_start(const struct lu_env *env, struct osc_io *oio, |
| struct osc_object *obj, __u64 size); |
| void osc_cache_truncate_end(const struct lu_env *env, struct osc_io *oio, |
| struct osc_object *obj); |
| int osc_cache_writeback_range(const struct lu_env *env, struct osc_object *obj, |
| pgoff_t start, pgoff_t end, int hp, int discard); |
| int osc_cache_wait_range(const struct lu_env *env, struct osc_object *obj, |
| pgoff_t start, pgoff_t end); |
| void osc_io_unplug(const struct lu_env *env, struct client_obd *cli, |
| struct osc_object *osc, pdl_policy_t pol); |
| |
| void osc_object_set_contended (struct osc_object *obj); |
| void osc_object_clear_contended(struct osc_object *obj); |
| int osc_object_is_contended (struct osc_object *obj); |
| |
| int osc_lock_is_lockless (const struct osc_lock *olck); |
| |
| /***************************************************************************** |
| * |
| * Accessors. |
| * |
| */ |
| |
| static inline struct osc_thread_info *osc_env_info(const struct lu_env *env) |
| { |
| struct osc_thread_info *info; |
| |
| info = lu_context_key_get(&env->le_ctx, &osc_key); |
| LASSERT(info != NULL); |
| return info; |
| } |
| |
| static inline struct osc_session *osc_env_session(const struct lu_env *env) |
| { |
| struct osc_session *ses; |
| |
| ses = lu_context_key_get(env->le_ses, &osc_session_key); |
| LASSERT(ses != NULL); |
| return ses; |
| } |
| |
| static inline struct osc_io *osc_env_io(const struct lu_env *env) |
| { |
| return &osc_env_session(env)->os_io; |
| } |
| |
| static inline int osc_is_object(const struct lu_object *obj) |
| { |
| return obj->lo_dev->ld_type == &osc_device_type; |
| } |
| |
| static inline struct osc_device *lu2osc_dev(const struct lu_device *d) |
| { |
| LINVRNT(d->ld_type == &osc_device_type); |
| return container_of0(d, struct osc_device, od_cl.cd_lu_dev); |
| } |
| |
| static inline struct obd_export *osc_export(const struct osc_object *obj) |
| { |
| return lu2osc_dev(obj->oo_cl.co_lu.lo_dev)->od_exp; |
| } |
| |
| static inline struct client_obd *osc_cli(const struct osc_object *obj) |
| { |
| return &osc_export(obj)->exp_obd->u.cli; |
| } |
| |
| static inline struct osc_object *cl2osc(const struct cl_object *obj) |
| { |
| LINVRNT(osc_is_object(&obj->co_lu)); |
| return container_of0(obj, struct osc_object, oo_cl); |
| } |
| |
| static inline struct cl_object *osc2cl(const struct osc_object *obj) |
| { |
| return (struct cl_object *)&obj->oo_cl; |
| } |
| |
| static inline ldlm_mode_t osc_cl_lock2ldlm(enum cl_lock_mode mode) |
| { |
| LASSERT(mode == CLM_READ || mode == CLM_WRITE || mode == CLM_GROUP); |
| if (mode == CLM_READ) |
| return LCK_PR; |
| else if (mode == CLM_WRITE) |
| return LCK_PW; |
| else |
| return LCK_GROUP; |
| } |
| |
| static inline enum cl_lock_mode osc_ldlm2cl_lock(ldlm_mode_t mode) |
| { |
| LASSERT(mode == LCK_PR || mode == LCK_PW || mode == LCK_GROUP); |
| if (mode == LCK_PR) |
| return CLM_READ; |
| else if (mode == LCK_PW) |
| return CLM_WRITE; |
| else |
| return CLM_GROUP; |
| } |
| |
| static inline struct osc_page *cl2osc_page(const struct cl_page_slice *slice) |
| { |
| LINVRNT(osc_is_object(&slice->cpl_obj->co_lu)); |
| return container_of0(slice, struct osc_page, ops_cl); |
| } |
| |
| static inline struct osc_page *oap2osc(struct osc_async_page *oap) |
| { |
| return container_of0(oap, struct osc_page, ops_oap); |
| } |
| |
| static inline struct cl_page *oap2cl_page(struct osc_async_page *oap) |
| { |
| return oap2osc(oap)->ops_cl.cpl_page; |
| } |
| |
| static inline struct osc_page *oap2osc_page(struct osc_async_page *oap) |
| { |
| return (struct osc_page *)container_of(oap, struct osc_page, ops_oap); |
| } |
| |
| static inline struct osc_lock *cl2osc_lock(const struct cl_lock_slice *slice) |
| { |
| LINVRNT(osc_is_object(&slice->cls_obj->co_lu)); |
| return container_of0(slice, struct osc_lock, ols_cl); |
| } |
| |
| static inline struct osc_lock *osc_lock_at(const struct cl_lock *lock) |
| { |
| return cl2osc_lock(cl_lock_at(lock, &osc_device_type)); |
| } |
| |
| static inline int osc_io_srvlock(struct osc_io *oio) |
| { |
| return (oio->oi_lockless && !oio->oi_cl.cis_io->ci_no_srvlock); |
| } |
| |
| enum osc_extent_state { |
| OES_INV = 0, /** extent is just initialized or destroyed */ |
| OES_ACTIVE = 1, /** process is using this extent */ |
| OES_CACHE = 2, /** extent is ready for IO */ |
| OES_LOCKING = 3, /** locking page to prepare IO */ |
| OES_LOCK_DONE = 4, /** locking finished, ready to send */ |
| OES_RPC = 5, /** in RPC */ |
| OES_TRUNC = 6, /** being truncated */ |
| OES_STATE_MAX |
| }; |
| |
| /** |
| * osc_extent data to manage dirty pages. |
| * osc_extent has the following attributes: |
| * 1. all pages in the same must be in one RPC in write back; |
| * 2. # of pages must be less than max_pages_per_rpc - implied by 1; |
| * 3. must be covered by only 1 osc_lock; |
| * 4. exclusive. It's impossible to have overlapped osc_extent. |
| * |
| * The lifetime of an extent is from when the 1st page is dirtied to when |
| * all pages inside it are written out. |
| * |
| * LOCKING ORDER |
| * ============= |
| * page lock -> client_obd_list_lock -> object lock(osc_object::oo_lock) |
| */ |
| struct osc_extent { |
| /** red-black tree node */ |
| struct rb_node oe_node; |
| /** osc_object of this extent */ |
| struct osc_object *oe_obj; |
| /** refcount, removed from red-black tree if reaches zero. */ |
| atomic_t oe_refc; |
| /** busy if non-zero */ |
| atomic_t oe_users; |
| /** link list of osc_object's oo_{hp|urgent|locking}_exts. */ |
| struct list_head oe_link; |
| /** state of this extent */ |
| unsigned int oe_state; |
| /** flags for this extent. */ |
| unsigned int oe_intree:1, |
| /** 0 is write, 1 is read */ |
| oe_rw:1, |
| oe_srvlock:1, |
| oe_memalloc:1, |
| /** an ACTIVE extent is going to be truncated, so when this extent |
| * is released, it will turn into TRUNC state instead of CACHE. */ |
| oe_trunc_pending:1, |
| /** this extent should be written asap and someone may wait for the |
| * write to finish. This bit is usually set along with urgent if |
| * the extent was CACHE state. |
| * fsync_wait extent can't be merged because new extent region may |
| * exceed fsync range. */ |
| oe_fsync_wait:1, |
| /** covering lock is being canceled */ |
| oe_hp:1, |
| /** this extent should be written back asap. set if one of pages is |
| * called by page WB daemon, or sync write or reading requests. */ |
| oe_urgent:1; |
| /** how many grants allocated for this extent. |
| * Grant allocated for this extent. There is no grant allocated |
| * for reading extents and sync write extents. */ |
| unsigned int oe_grants; |
| /** # of dirty pages in this extent */ |
| unsigned int oe_nr_pages; |
| /** list of pending oap pages. Pages in this list are NOT sorted. */ |
| struct list_head oe_pages; |
| /** Since an extent has to be written out in atomic, this is used to |
| * remember the next page need to be locked to write this extent out. |
| * Not used right now. |
| */ |
| struct osc_page *oe_next_page; |
| /** start and end index of this extent, include start and end |
| * themselves. Page offset here is the page index of osc_pages. |
| * oe_start is used as keyword for red-black tree. */ |
| pgoff_t oe_start; |
| pgoff_t oe_end; |
| /** maximum ending index of this extent, this is limited by |
| * max_pages_per_rpc, lock extent and chunk size. */ |
| pgoff_t oe_max_end; |
| /** waitqueue - for those who want to be notified if this extent's |
| * state has changed. */ |
| wait_queue_head_t oe_waitq; |
| /** lock covering this extent */ |
| struct cl_lock *oe_osclock; |
| /** terminator of this extent. Must be true if this extent is in IO. */ |
| task_t *oe_owner; |
| /** return value of writeback. If somebody is waiting for this extent, |
| * this value can be known by outside world. */ |
| int oe_rc; |
| /** max pages per rpc when this extent was created */ |
| unsigned int oe_mppr; |
| }; |
| |
| int osc_extent_finish(const struct lu_env *env, struct osc_extent *ext, |
| int sent, int rc); |
| int osc_extent_release(const struct lu_env *env, struct osc_extent *ext); |
| |
| /** @} osc */ |
| |
| #endif /* OSC_CL_INTERNAL_H */ |