* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2012, 2014, Intel Corporation.
+ * Copyright (c) 2012, 2015, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* - top-page keeps a reference to its sub-page, and destroys it when it
* is destroyed.
*
- * - sub-lock keep a reference to its top-locks. Top-lock keeps a
- * reference (and a hold, see cl_lock_hold()) on its sub-locks when it
- * actively using them (that is, in cl_lock_state::CLS_QUEUING,
- * cl_lock_state::CLS_ENQUEUED, cl_lock_state::CLS_HELD states). When
- * moving into cl_lock_state::CLS_CACHED state, top-lock releases a
- * hold. From this moment top-lock has only a 'weak' reference to its
- * sub-locks. This reference is protected by top-lock
- * cl_lock::cll_guard, and will be automatically cleared by the sub-lock
- * when the latter is destroyed. When a sub-lock is canceled, a
- * reference to it is removed from the top-lock array, and top-lock is
- * moved into CLS_NEW state. It is guaranteed that all sub-locks exist
- * while their top-lock is in CLS_HELD or CLS_CACHED states.
- *
* - IO's are not reference counted.
*
* To implement a connection between top and sub entities, lov layer is split
*
* \see cl_env_get()
*/
- int emrg_refcheck;
+ __u16 emrg_refcheck;
};
struct lov_device {
* When top-object is destroyed (lov_delete_raid0())
* it releases its reference to a sub-object and waits
* until the latter is finally destroyed.
+ *
+ * May be vmalloc'd, must be freed with OBD_FREE_LARGE.
*/
struct lovsub_object **lo_sub;
/**
* State that lov_io maintains for every sub-io.
*/
struct lov_io_sub {
- int sub_stripe;
- /**
- * sub-io for a stripe. Ideally sub-io's can be stopped and resumed
- * independently, with lov acting as a scheduler to maximize overall
- * throughput.
- */
- struct cl_io *sub_io;
- /**
- * Linkage into a list (hanging off lov_io::lis_active) of all
- * sub-io's active for the current IO iteration.
- */
+ __u16 sub_stripe;
+ /**
+ * environment's refcheck.
+ *
+ * \see cl_env_get()
+ */
+ __u16 sub_refcheck;
+ __u16 sub_reenter;
+ /**
+ * true, iff cl_io_init() was successfully executed against
+ * lov_io_sub::sub_io.
+ */
+ __u16 sub_io_initialized:1,
+ /**
+ * True, iff lov_io_sub::sub_io and lov_io_sub::sub_env weren't
+ * allocated, but borrowed from a per-device emergency pool.
+ */
+ sub_borrowed:1;
+ /**
+ * Linkage into a list (hanging off lov_io::lis_active) of all
+ * sub-io's active for the current IO iteration.
+ */
struct list_head sub_linkage;
- /**
- * true, iff cl_io_init() was successfully executed against
- * lov_io_sub::sub_io.
- */
- int sub_io_initialized;
- /**
- * True, iff lov_io_sub::sub_io and lov_io_sub::sub_env weren't
- * allocated, but borrowed from a per-device emergency pool.
- */
- int sub_borrowed;
- /**
- * environment, in which sub-io executes.
- */
- struct lu_env *sub_env;
- /**
- * environment's refcheck.
- *
- * \see cl_env_get()
- */
- int sub_refcheck;
- int sub_refcheck2;
- int sub_reenter;
- void *sub_cookie;
+ /**
+ * sub-io for a stripe. Ideally sub-io's can be stopped and resumed
+ * independently, with lov acting as a scheduler to maximize overall
+ * throughput.
+ */
+ struct cl_io *sub_io;
+ /**
+ * environment, in which sub-io executes.
+ */
+ struct lu_env *sub_env;
};
/**
* starting position within a file, for the current io loop iteration
* (stripe), used by ci_io_loop().
*/
- obd_off lis_pos;
- /**
- * end position with in a file, for the current stripe io. This is
- * exclusive (i.e., next offset after last byte affected by io).
- */
- obd_off lis_endpos;
+ loff_t lis_pos;
+ /**
+ * end position with in a file, for the current stripe io. This is
+ * exclusive (i.e., next offset after last byte affected by io).
+ */
+ loff_t lis_endpos;
- int lis_mem_frozen;
- int lis_stripe_count;
- int lis_active_subios;
+ int lis_mem_frozen;
+ int lis_stripe_count;
+ int lis_active_subios;
- /**
- * the index of ls_single_subio in ls_subios array
- */
- int lis_single_subio_index;
- struct cl_io lis_single_subio;
+ /**
+ * the index of ls_single_subio in ls_subios array
+ */
+ int lis_single_subio_index;
+ struct cl_io lis_single_subio;
- /**
- * size of ls_subios array, actually the highest stripe #
- */
- int lis_nr_subios;
- struct lov_io_sub *lis_subs;
- /**
- * List of active sub-io's.
- */
+ /**
+ * size of ls_subios array, actually the highest stripe #
+ * May be vmalloc'd, must be freed with OBD_FREE_LARGE().
+ */
+ int lis_nr_subios;
+ struct lov_io_sub *lis_subs;
+ /**
+ * List of active sub-io's.
+ */
struct list_head lis_active;
};
struct lov_sublock_env ls_subenv;
};
-/**
- * State of transfer for lov.
- */
-struct lov_req {
- struct cl_req_slice lr_cl;
-};
-
-/**
- * State of transfer for lovsub.
- */
-struct lovsub_req {
- struct cl_req_slice lsrq_cl;
-};
-
extern struct lu_device_type lov_device_type;
extern struct lu_device_type lovsub_device_type;
extern struct kmem_cache *lov_object_kmem;
extern struct kmem_cache *lov_thread_kmem;
extern struct kmem_cache *lov_session_kmem;
-extern struct kmem_cache *lov_req_kmem;
extern struct kmem_cache *lovsub_lock_kmem;
extern struct kmem_cache *lovsub_object_kmem;
-extern struct kmem_cache *lovsub_req_kmem;
extern struct kmem_cache *lov_lock_link_kmem;
return container_of0(slice, struct lov_page, lps_cl);
}
-static inline struct lov_req *cl2lov_req(const struct cl_req_slice *slice)
-{
- return container_of0(slice, struct lov_req, lr_cl);
-}
-
static inline struct lovsub_page *
cl2lovsub_page(const struct cl_page_slice *slice)
{
return container_of0(slice, struct lovsub_page, lsb_cl);
}
-static inline struct lovsub_req *cl2lovsub_req(const struct cl_req_slice *slice)
-{
- return container_of0(slice, struct lovsub_req, lsrq_cl);
-}
-
static inline struct lov_io *cl2lov_io(const struct lu_env *env,
const struct cl_io_slice *ios)
{
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