* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2012, 2013, Intel Corporation.
+ * Copyright (c) 2012, 2014, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#ifndef OSC_CL_INTERNAL_H
#define OSC_CL_INTERNAL_H
-#ifdef __KERNEL__
-# include <libcfs/libcfs.h>
-#else
-# include <liblustre.h>
-#endif
-
+#include <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 cl_io_slice oi_cl;
/** true if this io is lockless. */
int oi_lockless;
+ /** how many LRU pages are reserved for this IO */
+ unsigned long oi_lru_reserved;
+
/** 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;
-
- int oi_lru_reserved;
+ /** write osc_lock for this IO, used by osc_extent_find(). */
+ struct osc_lock *oi_write_osclock;
struct obd_info oi_info;
struct obdo oi_oa;
*/
pgoff_t oti_next_index;
pgoff_t oti_fn_index; /* first non-overlapped index */
+ struct cl_sync_io oti_anchor;
};
struct osc_object {
/**
* List of pages in transfer.
*/
- cfs_list_t oo_inflight[CRT_NR];
+ 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;
+ 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.
*/
- cfs_list_t oo_ready_item;
- cfs_list_t oo_hp_ready_item;
- cfs_list_t oo_write_item;
- cfs_list_t oo_read_item;
+ 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.
/**
* Manage write(dirty) extents.
*/
- cfs_list_t oo_hp_exts; /* list of hp extents */
- cfs_list_t oo_urgent_exts; /* list of writeback extents */
- cfs_list_t oo_rpc_exts;
+ 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;
- cfs_list_t oo_reading_exts;
+ struct list_head oo_reading_exts;
- cfs_atomic_t oo_nr_reads;
- cfs_atomic_t oo_nr_writes;
+ atomic_t oo_nr_reads;
+ atomic_t oo_nr_writes;
/** Protect extent tree. Will be used to protect
* oo_{read|write}_pages soon. */
struct radix_tree_root oo_tree;
spinlock_t oo_tree_lock;
unsigned long oo_npages;
+
+ /* Protect osc_lock this osc_object has */
+ spinlock_t oo_ol_spin;
+ struct list_head oo_ol_list;
};
static inline void osc_object_lock(struct osc_object *obj)
static inline int osc_object_is_locked(struct osc_object *obj)
{
+#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
return spin_is_locked(&obj->oo_lock);
+#else
+ /*
+ * It is not perfect to return true all the time.
+ * But since this function is only used for assertion
+ * and checking, it seems OK.
+ */
+ return 1;
+#endif
}
/*
OLS_ENQUEUED,
OLS_UPCALL_RECEIVED,
OLS_GRANTED,
- OLS_RELEASED,
- OLS_BLOCKED,
OLS_CANCELLED
};
*
* 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.
+ * osc_lock::ols_handle and a pointer to that lock in osc_lock::ols_dlmlock.
*
* This pointer is protected through a reference, acquired by
* osc_lock_upcall0(). Also, an additional reference is acquired by
* 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()
- */
- cfs_atomic_t ols_pageref;
+ struct cl_lock_slice ols_cl;
+ /** Internal lock to protect states, etc. */
+ spinlock_t ols_lock;
+ /** Owner sleeps on this channel for state change */
+ struct cl_sync_io *ols_owner;
+ /** waiting list for this lock to be cancelled */
+ struct list_head ols_waiting_list;
+ /** wait entry of ols_waiting_list */
+ struct list_head ols_wait_entry;
+ /** list entry for osc_object::oo_ol_list */
+ struct list_head ols_nextlock_oscobj;
+
+ /** underlying DLM lock */
+ struct ldlm_lock *ols_dlmlock;
+ /** 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;
+ /** lock value block */
+ struct ost_lvb ols_lvb;
/**
* true, if ldlm_lock_addref() was called against
*/
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.
* 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;
};
/**
* lru page list. See osc_lru_{del|use}() in osc_page.c for usage.
*/
- cfs_list_t ops_lru;
+ struct list_head ops_lru;
/**
* Linkage into a per-osc_object list of pages in flight. For
* debugging.
*/
- cfs_list_t ops_inflight;
+ struct list_head ops_inflight;
/**
* Thread that submitted this page for transfer. For debugging.
*/
* 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;
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);
+ struct cl_page *page, pgoff_t ind);
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_lru_add_batch(struct client_obd *cli, cfs_list_t *list);
+void osc_lru_add_batch(struct client_obd *cli, struct list_head *list);
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_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,
- cfs_list_t *list, int cmd, int brw_flags);
+ 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,
return container_of0(oap, struct osc_page, ops_oap);
}
+static inline pgoff_t osc_index(struct osc_page *opg)
+{
+ return opg->ops_cl.cpl_index;
+}
+
static inline struct cl_page *oap2cl_page(struct osc_async_page *oap)
{
return oap2osc(oap)->ops_cl.cpl_page;
return (struct osc_page *)container_of(oap, struct osc_page, ops_oap);
}
-static inline pgoff_t osc_index(struct osc_page *opg)
-{
- return opg->ops_cl.cpl_page->cp_index;
-}
-
static inline struct osc_lock *cl2osc_lock(const struct cl_lock_slice *slice)
{
LINVRNT(osc_is_object(&slice->cls_obj->co_lu));
*/
struct osc_extent {
/** red-black tree node */
- struct rb_node oe_node;
+ struct rb_node oe_node;
/** osc_object of this extent */
- struct osc_object *oe_obj;
+ struct osc_object *oe_obj;
/** refcount, removed from red-black tree if reaches zero. */
- cfs_atomic_t oe_refc;
+ atomic_t oe_refc;
/** busy if non-zero */
- cfs_atomic_t oe_users;
+ atomic_t oe_users;
/** link list of osc_object's oo_{hp|urgent|locking}_exts. */
- cfs_list_t oe_link;
+ struct list_head oe_link;
/** state of this extent */
- unsigned int oe_state;
+ unsigned int oe_state;
/** flags for this extent. */
- unsigned int oe_intree:1,
+ unsigned int oe_intree:1,
/** 0 is write, 1 is read */
- oe_rw:1,
- oe_srvlock:1,
- oe_memalloc:1,
+ oe_rw:1,
+ /** sync extent, queued by osc_queue_sync_pages() */
+ oe_sync: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,
+ 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,
+ oe_fsync_wait:1,
/** covering lock is being canceled */
- oe_hp:1,
+ 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;
+ 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;
+ unsigned int oe_grants;
/** # of dirty pages in this extent */
- unsigned int oe_nr_pages;
+ unsigned int oe_nr_pages;
/** list of pending oap pages. Pages in this list are NOT sorted. */
- cfs_list_t oe_pages;
+ 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;
+ 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;
+ 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;
+ 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;
+ wait_queue_head_t oe_waitq;
/** lock covering this extent */
- struct cl_lock *oe_osclock;
+ struct ldlm_lock *oe_dlmlock;
/** terminator of this extent. Must be true if this extent is in IO. */
- struct task_struct *oe_owner;
+ struct task_struct *oe_owner;
/** return value of writeback. If somebody is waiting for this extent,
* this value can be known by outside world. */
- int oe_rc;
+ int oe_rc;
/** max pages per rpc when this extent was created */
- unsigned int oe_mppr;
+ 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);
-int osc_lock_discard_pages(const struct lu_env *env, struct osc_lock *lock);
+int osc_lock_discard_pages(const struct lu_env *env, struct osc_object *osc,
+ pgoff_t start, pgoff_t end, enum cl_lock_mode mode);
typedef int (*osc_page_gang_cbt)(const struct lu_env *, struct cl_io *,
struct osc_page *, void *);
int osc_page_gang_lookup(const struct lu_env *env, struct cl_io *io,
struct osc_object *osc, pgoff_t start, pgoff_t end,
osc_page_gang_cbt cb, void *cbdata);
-
/** @} osc */
#endif /* OSC_CL_INTERNAL_H */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff