#include <cl_object.h>
#include "lov_internal.h"
-/** \defgroup lov lov
+/* \defgroup lov lov
* Logical object volume layer. This layer implements data striping (raid0).
*
* At the lov layer top-entity (object, lock, io) is connected to one or
};
struct lov_device {
- /*
- * XXX Locking of lov-private data is missing.
- */
- struct cl_device ld_cl;
- struct lov_obd *ld_lov;
- /** size of lov_device::ld_target[] array */
- __u32 ld_target_nr;
- struct lovsub_device **ld_target;
- __u32 ld_flags;
+ /*
+ * XXX Locking of lov-private data is missing.
+ */
+ struct cl_device ld_cl;
+ struct lov_obd *ld_lov;
+ /* size of lov_device::ld_target[] array */
+ __u32 ld_target_nr;
+ struct lovsub_device **ld_target;
+ __u32 ld_flags;
/* Data-on-MDT devices */
__u32 ld_md_tgts_nr;
struct lu_site ld_site;
};
-/**
+/*
* Layout type.
*/
enum lov_layout_type {
- LLT_EMPTY, /** empty file without body (mknod + truncate) */
- LLT_RELEASED, /** file with no objects (data in HSM) */
- LLT_COMP, /** support composite layout */
- LLT_FOREIGN, /** foreign layout */
+ LLT_EMPTY, /* empty file without body (mknod + truncate) */
+ LLT_RELEASED, /* file with no objects (data in HSM) */
+ LLT_COMP, /* support composite layout */
+ LLT_FOREIGN, /* foreign layout */
LLT_NR
};
return "";
}
-/**
+/*
* Return lov_layout_entry_type associated with a given composite layout
* entry.
*/
};
struct lov_layout_raid0 {
- unsigned lo_nr;
- /**
+ unsigned int lo_nr;
+ /*
* When this is true, lov_object::lo_attr contains
* valid up to date attributes for a top-level
* object. This field is reset to 0 when attributes of
* any sub-object change.
*/
bool lo_attr_valid;
- /**
+ /*
* Array of sub-objects. Allocated when top-object is
* created (lov_init_raid0()).
*
* until the latter is finally destroyed.
*/
struct lovsub_object **lo_sub;
- /**
+ /*
* protect lo_sub
*/
spinlock_t lo_sub_lock;
- /**
+ /*
* Cached object attribute, built from sub-object
* attributes.
*/
struct lov_mirror_entry {
unsigned short lre_mirror_id;
unsigned short lre_stale:1, /* set if any components is stale */
- lre_valid:1, /* set if at least one of components
- * in this mirror is valid */
+ /* set if one of components in this mirror is valid */
+ lre_valid:1,
lre_foreign:1; /* set if it is a foreign component */
int lre_preference; /* overall preference of this mirror */
- unsigned short lre_start; /* index to lo_entries, start index of
- * this mirror */
+ unsigned short lre_start; /* idx(lo_entries) start idx (mirror) */
unsigned short lre_end; /* end index of this mirror */
};
LO_NEED_INODE_LOCK = 0x2,
};
-/**
+/*
* lov-specific file state.
*
* lov object has particular layout type, determining how top-object is built
*/
struct lov_object {
struct cl_object lo_cl;
- /**
+ /*
* Serializes object operations with transitions between layout types.
*
* This semaphore is taken in shared mode by all object methods, and
* \see lov_object::lo_type
*/
struct rw_semaphore lo_type_guard;
- /**
+ /*
* Type of an object. Protected by lov_object::lo_type_guard.
*/
enum lov_layout_type lo_type;
- /**
+ /*
* Object flags.
*/
unsigned long lo_obj_flags;
- /**
+ /*
* How many IOs are on going on this object. Layout can be changed
* only if there is no active IO.
*/
atomic_t lo_active_ios;
- /**
+ /*
* Waitq - wait for no one else is using lo_lsm
*/
wait_queue_head_t lo_waitq;
- /**
+ /*
* Layout metadata. NULL if empty layout.
*/
struct lov_stripe_md *lo_lsm;
struct lov_layout_state_released {
} released;
struct lov_layout_composite {
- /**
- * flags of lov_comp_md_v1::lcm_flags. Mainly used
+ /* flags of lov_comp_md_v1::lcm_flags. Mainly used
* by FLR.
*/
uint32_t lo_flags;
- /**
- * For FLR: index of preferred mirror to read.
+ /* For FLR: index of preferred mirror to read.
* Preferred mirror is initialized by the preferred
* bit of lsme. It can be changed when the preferred
* is inaccessible.
*/
int lo_preferred_mirror;
- /**
- * For FLR: Number of (valid) mirrors.
- */
- unsigned lo_mirror_count;
+ /* For FLR: Number of (valid) mirrors. */
+ unsigned int lo_mirror_count;
struct lov_mirror_entry *lo_mirrors;
- /**
- * Current entry count of lo_entries, include
+ /* Current entry count of lo_entries, include
* invalid entries.
*/
unsigned int lo_entry_count;
struct lov_layout_entry *lo_entries;
} composite;
} u;
- /**
- * Thread that acquired lov_object::lo_type_guard in an exclusive
- * mode.
- */
+ /* Thread that acquired lov_object::lo_type_guard in exclusive mode. */
struct task_struct *lo_owner;
};
return lov->lo_lsm->lsm_entries[i];
}
-static inline unsigned lov_flr_state(const struct lov_object *lov)
+static inline unsigned int lov_flr_state(const struct lov_object *lov)
{
if (lov->lo_type != LLT_COMP)
return LCM_FL_NONE;
lov_layout_entry_index(struct lov_object *lov, struct lov_layout_entry *entry)
{
struct lov_layout_entry *first = &lov->u.composite.lo_entries[0];
- unsigned index = (unsigned)(entry - first);
+ unsigned int index = (unsigned int)(entry - first);
LASSERT(entry >= first);
LASSERT(index < lov->u.composite.lo_entry_count);
return index;
}
-/**
- * State lov_lock keeps for each sub-lock.
- */
+/* State lov_lock keeps for each sub-lock. */
struct lov_lock_sub {
- /** sub-lock itself */
+ /* sub-lock itself */
struct cl_lock sub_lock;
- /** Set if the sublock has ever been enqueued, meaning it may
- * hold resources of underlying layers */
+ /* Set if the sublock has ever been enqueued, meaning it may
+ * hold resources of underlying layers
+ */
unsigned int sub_is_enqueued:1,
sub_initialized:1;
int sub_index;
};
-/**
- * lov-specific lock state.
- */
+/* lov-specific lock state. */
struct lov_lock {
struct cl_lock_slice lls_cl;
- /** Number of sub-locks in this lock */
+ /* Number of sub-locks in this lock */
int lls_nr;
- /** sublock array */
+ /* sublock array */
struct lov_lock_sub lls_sub[0];
};
-/*
- * Bottom half.
- */
-
+/* Bottom half. */
struct lovsub_device {
- struct cl_device acid_cl;
- struct cl_device *acid_next;
+ struct cl_device acid_cl;
+ struct cl_device *acid_next;
};
struct lovsub_object {
- struct cl_object_header lso_header;
- struct cl_object lso_cl;
- struct lov_object *lso_super;
- int lso_index;
+ struct cl_object_header lso_header;
+ struct cl_object lso_cl;
+ struct lov_object *lso_super;
+ int lso_index;
};
-/**
- * Describe the environment settings for sublocks.
- */
+/* Describe the environment settings for sublocks. */
struct lov_sublock_env {
- const struct lu_env *lse_env;
- struct cl_io *lse_io;
+ const struct lu_env *lse_env;
+ struct cl_io *lse_io;
};
struct lov_thread_info {
struct cl_page_list lti_plist;
};
-/**
- * State that lov_io maintains for every sub-io.
- */
+/* State that lov_io maintains for every sub-io. */
struct lov_io_sub {
- /**
- * Linkage into a list (hanging off lov_io::lis_subios)
- */
+ /* Linkage into a list (hanging off lov_io::lis_subios) */
struct list_head sub_list;
- /**
- * Linkage into a list (hanging off lov_io::lis_active) of all
+ /* 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;
unsigned int sub_subio_index;
- /**
- * sub-io for a stripe. Ideally sub-io's can be stopped and resumed
+ /* 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.
- */
+ /* environment, in which sub-io executes. */
struct lu_env *sub_env;
- /**
- * environment's refcheck.
- *
- * \see cl_env_get()
- */
+ /* environment's refcheck. (cl_env_get()) */
__u16 sub_refcheck;
};
-/**
- * IO state private for LOV.
- */
+/* IO state private for LOV. */
#define LIS_CACHE_ENTRY_NONE -ENOENT
struct lov_io {
- /** super-class */
- struct cl_io_slice lis_cl;
+ /* super-class */
+ struct cl_io_slice lis_cl;
- /**
- * FLR: index to lo_mirrors. Valid only if lov_is_flr() returns true.
+ /* FLR: index to lo_mirrors. Valid only if lov_is_flr() returns true.
*
* The mirror index of this io. Preserved over cl_io_init()
* if io->ci_ndelay_tried is greater than zero.
*/
int lis_mirror_index;
- /**
- * FLR: the layout gen when lis_mirror_index was cached. The
+ /* FLR: the layout gen when lis_mirror_index was cached. The
* mirror index makes sense only when the layout gen doesn't
* change.
*/
int lis_mirror_layout_gen;
- /**
- * fields below this will be initialized in lov_io_init().
+ /* fields below this will be initialized in lov_io_init(). */
+ unsigned int lis_preserved;
+
+ /* Pointer to obj slice. Duplicate of lov_io::lis_cl::cis_object. */
+ struct lov_object *lis_object;
+ /*
+ * Original end-of-io position for this IO, set by the upper layer as
+ * cl_io::u::ci_rw::pos + cl_io::u::ci_rw::count. lov remembers this,
+ * changes pos and count to fit IO into a single stripe and uses saved
+ * value to determine when IO iterations have to stop.
+ *
+ * This is used only for CIT_READ and CIT_WRITE io's.
*/
- unsigned lis_preserved;
-
- /**
- * Pointer to the object slice. This is a duplicate of
- * lov_io::lis_cl::cis_object.
- */
- struct lov_object *lis_object;
- /**
- * Original end-of-io position for this IO, set by the upper layer as
- * cl_io::u::ci_rw::pos + cl_io::u::ci_rw::count. lov remembers this,
- * changes pos and count to fit IO into a single stripe and uses saved
- * value to determine when IO iterations have to stop.
- *
- * This is used only for CIT_READ and CIT_WRITE io's.
- */
- loff_t lis_io_endpos;
-
- /**
- * Record the stripe index before the truncate size, used for setting OST
- * object size for truncate. LU-14128. lis_trunc_stripe_index[i] refers to
+ loff_t lis_io_endpos;
+
+ /* Record stripe index before the truncate size, used for setting OST
+ * obj size for truncate. LU-14128. lis_trunc_stripe_index[i] refers to
* lov_object.u.composite.lo_entries[i].
*/
int *lis_trunc_stripe_index;
- /**
- * starting position within a file, for the current io loop iteration
- * (stripe), used by ci_io_loop().
- */
+ /* starting position within a file, for the current io loop iteration
+ * (stripe), used by ci_io_loop().
+ */
loff_t lis_pos;
- /**
- * end position with in a file, for the current stripe io. This is
+ /* 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_nr_subios;
- /**
- * the index of ls_single_subio in ls_subios array
- */
+ /* the index of ls_single_subio in ls_subios array */
int lis_single_subio_index;
struct lov_io_sub lis_single_subio;
- /**
- * List of active sub-io's. Active sub-io's are under the range
+ /* List of active sub-io's. Active sub-io's are under the range
* of [lis_pos, lis_endpos).
*/
struct list_head lis_active;
- /**
- * All sub-io's created in this lov_io.
- */
+ /* All sub-io's created in this lov_io. */
struct list_head lis_subios;
/* Cached results from stripe & offset calculations for page init */
int lis_cached_entry;
};
struct lov_session {
- struct lov_io ls_io;
- struct lov_sublock_env ls_subenv;
+ struct lov_io ls_io;
+ struct lov_sublock_env ls_subenv;
};
extern struct lu_device_type lov_device_type;
extern struct kmem_cache *lovsub_object_kmem;
int lov_lock_init_composite(const struct lu_env *env, struct cl_object *obj,
- struct cl_lock *lock, const struct cl_io *io);
-int lov_lock_init_empty (const struct lu_env *env, struct cl_object *obj,
- struct cl_lock *lock, const struct cl_io *io);
+ struct cl_lock *lock, const struct cl_io *io);
+int lov_lock_init_empty(const struct lu_env *env, struct cl_object *obj,
+ struct cl_lock *lock, const struct cl_io *io);
int lov_io_init_composite(const struct lu_env *env, struct cl_object *obj,
- struct cl_io *io);
-int lov_io_init_empty (const struct lu_env *env, struct cl_object *obj,
- struct cl_io *io);
+ struct cl_io *io);
+int lov_io_init_empty(const struct lu_env *env, struct cl_object *obj,
+ struct cl_io *io);
int lov_io_init_released(const struct lu_env *env, struct cl_object *obj,
- struct cl_io *io);
+ struct cl_io *io);
struct lov_io_sub *lov_sub_get(const struct lu_env *env, struct lov_io *lio,
- int stripe);
+ int stripe);
enum {
CP_LOV_INDEX_EMPTY = -1U,
return cp->cp_lov_index == CP_LOV_INDEX_EMPTY;
}
-int lov_page_init_empty (const struct lu_env *env, struct cl_object *obj,
+int lov_page_init_empty(const struct lu_env *env, struct cl_object *obj,
struct cl_page *page, pgoff_t index);
int lov_page_init_composite(const struct lu_env *env, struct cl_object *obj,
struct cl_page *page, pgoff_t index);
int lov_page_init_foreign(const struct lu_env *env, struct cl_object *obj,
struct cl_page *page, pgoff_t index);
-struct lu_object *lov_object_alloc (const struct lu_env *env,
- const struct lu_object_header *hdr,
- struct lu_device *dev);
+struct lu_object *lov_object_alloc(const struct lu_env *env,
+ const struct lu_object_header *hdr,
+ struct lu_device *dev);
struct lu_object *lovsub_object_alloc(const struct lu_env *env,
- const struct lu_object_header *hdr,
- struct lu_device *dev);
+ const struct lu_object_header *hdr,
+ struct lu_device *dev);
int lov_io_layout_at(struct lov_io *lio, __u64 offset);
#define lov_foreach_target(lov, var) \
- for (var = 0; var < lov_targets_nr(lov); ++var)
+ for (var = 0; var < lov_targets_nr(lov); ++var)
static inline struct lu_extent *lov_io_extent(struct lov_io *io, int i)
{
return &lov_lse(io->lis_object, i)->lsme_extent;
}
-/**
- * For layout entries within @ext.
- */
+/* For layout entries within @ext. */
#define lov_foreach_io_layout(ind, lio, ext) \
for (ind = lov_io_layout_at(lio, (ext)->e_start); \
ind >= 0 && \
lu_extent_is_overlapped(lov_io_extent(lio, ind), ext); \
ind = lov_io_layout_at(lio, lov_io_extent(lio, ind)->e_end))
-/*****************************************************************************
- *
+/*
* Type conversions.
*
* Accessors.
- *
*/
-
static inline struct lov_session *lov_env_session(const struct lu_env *env)
{
- struct lov_session *ses;
+ struct lov_session *ses;
- ses = lu_context_key_get(env->le_ses, &lov_session_key);
- LASSERT(ses != NULL);
- return ses;
+ ses = lu_context_key_get(env->le_ses, &lov_session_key);
+ LASSERT(ses != NULL);
+ return ses;
}
static inline struct lov_io *lov_env_io(const struct lu_env *env)
{
- return &lov_env_session(env)->ls_io;
+ return &lov_env_session(env)->ls_io;
}
static inline int lov_is_object(const struct lu_object *obj)
{
- return obj->lo_dev->ld_type == &lov_device_type;
+ return obj->lo_dev->ld_type == &lov_device_type;
}
static inline int lovsub_is_object(const struct lu_object *obj)
{
- return obj->lo_dev->ld_type == &lovsub_device_type;
+ return obj->lo_dev->ld_type == &lovsub_device_type;
}
static inline struct lu_device *lov2lu_dev(struct lov_device *lov)
{
- return &lov->ld_cl.cd_lu_dev;
+ return &lov->ld_cl.cd_lu_dev;
}
static inline struct lov_device *lu2lov_dev(const struct lu_device *d)
static inline struct cl_device *lovsub2cl_dev(struct lovsub_device *lovsub)
{
- return &lovsub->acid_cl;
+ return &lovsub->acid_cl;
}
static inline struct lu_device *lovsub2lu_dev(struct lovsub_device *lovsub)
{
- return &lovsub2cl_dev(lovsub)->cd_lu_dev;
+ return &lovsub2cl_dev(lovsub)->cd_lu_dev;
}
static inline struct lovsub_device *lu2lovsub_dev(const struct lu_device *d)
static inline struct lu_object *lov2lu(struct lov_object *lov)
{
- return &lov->lo_cl.co_lu;
+ return &lov->lo_cl.co_lu;
}
static inline struct cl_object *lov2cl(struct lov_object *lov)
{
- return &lov->lo_cl;
+ return &lov->lo_cl;
}
static inline struct lov_object *lu2lov(const struct lu_object *obj)
}
static inline struct lov_io *cl2lov_io(const struct lu_env *env,
- const struct cl_io_slice *ios)
+ const struct cl_io_slice *ios)
{
- struct lov_io *lio;
+ struct lov_io *lio;
- lio = container_of(ios, struct lov_io, lis_cl);
- LASSERT(lio == lov_env_io(env));
- return lio;
+ lio = container_of(ios, struct lov_io, lis_cl);
+ LASSERT(lio == lov_env_io(env));
+ return lio;
}
static inline int lov_targets_nr(const struct lov_device *lov)
{
- return lov->ld_lov->desc.ld_tgt_count;
+ return lov->ld_lov->desc.ld_tgt_count;
}
static inline struct lov_thread_info *lov_env_info(const struct lu_env *env)
{
- struct lov_thread_info *info;
+ struct lov_thread_info *info;
- info = lu_context_key_get(&env->le_ctx, &lov_key);
- LASSERT(info != NULL);
- return info;
+ info = lu_context_key_get(&env->le_ctx, &lov_key);
+ LASSERT(info != NULL);
+ return info;
}
/* lov_pack.c */
struct lov_stripe_md *lsm, struct lov_user_md __user *lump,
size_t size);
-/** @} lov */
-
#endif
git://git.whamcloud.com / fs / lustre-release.git / commitdiff