* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2012, 2016, Intel Corporation.
+ * Copyright (c) 2012, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
struct lovsub_device;
struct lovsub_object;
-struct lovsub_lock;
enum lov_device_flags {
LOV_DEV_INITIALIZED = 1 << 0
* Upper half.
*/
+/* Data-on-MDT array item in lov_device::ld_md_tgts[] */
+struct lovdom_device {
+ struct cl_device *ldm_mdc;
+ int ldm_idx;
+};
+
struct lov_device {
/*
* XXX Locking of lov-private data is missing.
__u32 ld_target_nr;
struct lovsub_device **ld_target;
__u32 ld_flags;
+
+ /* Data-on-MDT devices */
+ __u32 ld_md_tgts_nr;
+ struct lovdom_device *ld_md_tgts;
+ struct obd_device *ld_lmv;
+ /* LU site for subdevices */
+ struct lu_site ld_site;
};
/**
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 "RELEASED";
case LLT_COMP:
return "COMPOSITE";
+ case LLT_FOREIGN:
+ return "FOREIGN";
case LLT_NR:
LBUG();
}
return "";
}
+/**
+ * Return lov_layout_entry_type associated with a given composite layout
+ * entry.
+ */
+static inline __u32 lov_entry_type(struct lov_stripe_md_entry *lsme)
+{
+ if ((lov_pattern(lsme->lsme_pattern) & LOV_PATTERN_RAID0) ||
+ (lov_pattern(lsme->lsme_pattern) == LOV_PATTERN_MDT))
+ return lov_pattern(lsme->lsme_pattern &
+ ~LOV_PATTERN_OVERSTRIPING);
+ return 0;
+}
+
+struct lov_layout_entry;
+struct lov_object;
+struct lov_lock_sub;
+
+struct lov_comp_layout_entry_ops {
+ int (*lco_init)(const struct lu_env *env, struct lov_device *dev,
+ struct lov_object *lov, unsigned int index,
+ const struct cl_object_conf *conf,
+ struct lov_layout_entry *lle);
+ void (*lco_fini)(const struct lu_env *env,
+ struct lov_layout_entry *lle);
+ int (*lco_getattr)(const struct lu_env *env, struct lov_object *obj,
+ unsigned int index, struct lov_layout_entry *lle,
+ struct cl_attr **attr);
+};
+
struct lov_layout_raid0 {
unsigned lo_nr;
/**
* object. This field is reset to 0 when attributes of
* any sub-object change.
*/
- int lo_attr_valid;
+ bool lo_attr_valid;
/**
* Array of sub-objects. Allocated when top-object is
* created (lov_init_raid0()).
struct cl_attr lo_attr;
};
+struct lov_layout_dom {
+ /* keep this always at first place so DOM layout entry
+ * can be addressed also as RAID0 after initialization.
+ */
+ struct lov_layout_raid0 lo_dom_r0;
+ struct lovsub_object *lo_dom;
+ struct lov_oinfo *lo_loi;
+};
+
+struct lov_layout_entry {
+ __u32 lle_type;
+ unsigned int lle_valid:1;
+ struct lu_extent *lle_extent;
+ struct lov_stripe_md_entry *lle_lsme;
+ struct lov_comp_layout_entry_ops *lle_comp_ops;
+ union {
+ struct lov_layout_raid0 lle_raid0;
+ struct lov_layout_dom lle_dom;
+ };
+};
+
+struct lov_mirror_entry {
+ unsigned short lre_mirror_id;
+ unsigned short lre_preferred:1,
+ lre_stale:1, /* set if any components is stale */
+ lre_valid:1; /* set if at least one of components
+ * in this mirror is valid */
+ unsigned short lre_start; /* index to lo_entries, start index of
+ * this mirror */
+ unsigned short lre_end; /* end index of this mirror */
+};
+
/**
* lov-specific file state.
*
* function corresponding to the current layout type.
*/
struct lov_object {
- struct cl_object lo_cl;
+ struct cl_object lo_cl;
/**
* Serializes object operations with transitions between layout types.
*
} released;
struct lov_layout_composite {
/**
- * Current valid entry count of lo_entries.
+ * flags of lov_comp_md_v1::lcm_flags. Mainly used
+ * by FLR.
+ */
+ uint32_t lo_flags;
+ /**
+ * 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.
+ * In order to make lov_lsm_entry() return the same
+ * mirror in the same IO context, it's only possible
+ * to change the preferred mirror when the
+ * lo_active_ios reaches zero.
+ */
+ int lo_preferred_mirror;
+ /**
+ * For FLR: the lock to protect access to
+ * lo_preferred_mirror.
+ */
+ spinlock_t lo_write_lock;
+ /**
+ * For FLR: Number of (valid) mirrors.
*/
- unsigned int lo_entry_count;
- struct lov_layout_entry {
- struct lu_extent lle_extent;
- struct lov_layout_raid0 lle_raid0;
- } *lo_entries;
+ unsigned lo_mirror_count;
+ struct lov_mirror_entry *lo_mirrors;
+ /**
+ * Current entry count of lo_entries, include
+ * invalid entries.
+ */
+ unsigned int lo_entry_count;
+ struct lov_layout_entry *lo_entries;
} composite;
} u;
/**
struct task_struct *lo_owner;
};
-#define lov_foreach_layout_entry(lov, entry) \
- for (entry = &lov->u.composite.lo_entries[0]; \
- entry < &lov->u.composite.lo_entries \
- [lov->u.composite.lo_entry_count]; \
- entry++)
+static inline struct lov_layout_raid0 *lov_r0(struct lov_object *lov, int i)
+{
+ LASSERT(lov->lo_type == LLT_COMP);
+ LASSERTF(i < lov->u.composite.lo_entry_count,
+ "entry %d entry_count %d", i, lov->u.composite.lo_entry_count);
+
+ return &lov->u.composite.lo_entries[i].lle_raid0;
+}
+
+static inline struct lov_stripe_md_entry *lov_lse(struct lov_object *lov, int i)
+{
+ LASSERT(lov->lo_lsm != NULL);
+ LASSERT(i < lov->lo_lsm->lsm_entry_count);
+
+ return lov->lo_lsm->lsm_entries[i];
+}
+
+static inline unsigned lov_flr_state(const struct lov_object *lov)
+{
+ if (lov->lo_type != LLT_COMP)
+ return LCM_FL_NONE;
+
+ return lov->u.composite.lo_flags & LCM_FL_FLR_MASK;
+}
+
+static inline bool lov_is_flr(const struct lov_object *lov)
+{
+ return lov_flr_state(lov) != LCM_FL_NONE;
+}
+
+static inline struct lov_layout_entry *lov_entry(struct lov_object *lov, int i)
+{
+ LASSERT(lov->lo_type == LLT_COMP);
+ LASSERTF(i < lov->u.composite.lo_entry_count,
+ "entry %d entry_count %d", i, lov->u.composite.lo_entry_count);
+
+ return &lov->u.composite.lo_entries[i];
+}
+
+#define lov_for_layout_entry(lov, entry, start, end) \
+ for (entry = lov_entry(lov, start); \
+ entry <= lov_entry(lov, end); entry++)
+
+#define lov_foreach_layout_entry(lov, entry) \
+ lov_for_layout_entry(lov, entry, 0, \
+ (lov)->u.composite.lo_entry_count - 1)
+
+#define lov_foreach_mirror_layout_entry(lov, entry, lre) \
+ lov_for_layout_entry(lov, entry, (lre)->lre_start, (lre)->lre_end)
+
+static inline struct lov_mirror_entry *
+lov_mirror_entry(struct lov_object *lov, int i)
+{
+ LASSERT(i < lov->u.composite.lo_mirror_count);
+ return &lov->u.composite.lo_mirrors[i];
+}
+
+#define lov_foreach_mirror_entry(lov, lre) \
+ for (lre = lov_mirror_entry(lov, 0); \
+ lre <= lov_mirror_entry(lov, \
+ lov->u.composite.lo_mirror_count - 1); \
+ lre++)
+
+static inline unsigned
+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);
+
+ LASSERT(entry >= first);
+ LASSERT(index < lov->u.composite.lo_entry_count);
+
+ return index;
+}
/**
* State lov_lock keeps for each sub-lock.
struct lov_page {
struct cl_page_slice lps_cl;
- /** layout_entry + stripe index, composed using lov_comp_index() */
- unsigned int lps_index;
+ /* the layout gen when this page was created */
+ __u32 lps_layout_gen;
};
/*
};
/**
- * Lock state at lovsub layer.
- */
-struct lovsub_lock {
- struct cl_lock_slice lss_cl;
-};
-
-/**
* Describe the environment settings for sublocks.
*/
struct lov_sublock_env {
struct cl_io *lse_io;
};
-struct lovsub_page {
- struct cl_page_slice lsb_cl;
-};
-
-
struct lov_thread_info {
struct cl_object_conf lti_stripe_conf;
struct lu_fid lti_fid;
struct ost_lvb lti_lvb;
struct cl_2queue lti_cl2q;
struct cl_page_list lti_plist;
- wait_queue_t lti_waiter;
+ wait_queue_entry_t lti_waiter;
};
/**
* \see cl_env_get()
*/
__u16 sub_refcheck;
- __u16 sub_reenter;
};
/**
struct lov_io {
/** super-class */
struct cl_io_slice lis_cl;
+
+ /**
+ * 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
+ * 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().
+ */
+ unsigned lis_preserved;
+
/**
* Pointer to the object slice. This is a duplicate of
* lov_io::lis_cl::cis_object.
* All sub-io's created in this lov_io.
*/
struct list_head lis_subios;
+
};
struct lov_session {
extern struct kmem_cache *lov_thread_kmem;
extern struct kmem_cache *lov_session_kmem;
-extern struct kmem_cache *lovsub_lock_kmem;
extern struct kmem_cache *lovsub_object_kmem;
int lov_object_init (const struct lu_env *env, struct lu_object *obj,
struct cl_lock *lock, const struct cl_io *io);
int lov_io_init (const struct lu_env *env, struct cl_object *obj,
struct cl_io *io);
-int lovsub_lock_init (const struct lu_env *env, struct cl_object *obj,
- struct cl_lock *lock, const struct cl_io *io);
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_page_init (const struct lu_env *env, struct cl_object *ob,
struct cl_page *page, pgoff_t index);
-int lovsub_page_init (const struct lu_env *env, struct cl_object *ob,
- struct cl_page *page, pgoff_t index);
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 *lovsub_object_alloc(const struct lu_env *env,
const struct lu_object_header *hdr,
struct lu_device *dev);
struct lov_stripe_md *lov_lsm_addref(struct lov_object *lov);
int lov_page_stripe(const struct cl_page *page);
+bool lov_page_is_empty(const struct cl_page *page);
int lov_lsm_entry(const struct lov_stripe_md *lsm, __u64 offset);
+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)
+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.
+ */
+#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.
return container_of0(obj, struct lovsub_object, lso_cl.co_lu);
}
-static inline struct lovsub_lock *
-cl2lovsub_lock(const struct cl_lock_slice *slice)
-{
- LINVRNT(lovsub_is_object(&slice->cls_obj->co_lu));
- return container_of(slice, struct lovsub_lock, lss_cl);
-}
-
-static inline struct lovsub_lock *cl2sub_lock(const struct cl_lock *lock)
-{
- const struct cl_lock_slice *slice;
-
- slice = cl_lock_at(lock, &lovsub_device_type);
- LASSERT(slice != NULL);
- return cl2lovsub_lock(slice);
-}
-
static inline struct lov_lock *cl2lov_lock(const struct cl_lock_slice *slice)
{
LINVRNT(lov_is_object(&slice->cls_obj->co_lu));
return container_of0(slice, struct lov_page, lps_cl);
}
-static inline struct lovsub_page *
-cl2lovsub_page(const struct cl_page_slice *slice)
-{
- LINVRNT(lovsub_is_object(&slice->cpl_obj->co_lu));
- return container_of0(slice, struct lovsub_page, lsb_cl);
-}
-
static inline struct lov_io *cl2lov_io(const struct lu_env *env,
const struct cl_io_slice *ios)
{
return info;
}
-static inline struct lov_layout_raid0 *lov_r0(struct lov_object *lov, int i)
-{
- LASSERT(lov->lo_type == LLT_COMP);
- LASSERTF(i < lov->u.composite.lo_entry_count,
- "entry %d entry_count %d", i, lov->u.composite.lo_entry_count);
-
- return &lov->u.composite.lo_entries[i].lle_raid0;
-}
-
-static inline struct lov_stripe_md_entry *lov_lse(struct lov_object *lov, int i)
-{
- LASSERT(lov->lo_lsm != NULL);
- LASSERT(i < lov->lo_lsm->lsm_entry_count);
-
- return lov->lo_lsm->lsm_entries[i];
-}
-
/* lov_pack.c */
int lov_getstripe(const struct lu_env *env, struct lov_object *obj,
struct lov_stripe_md *lsm, struct lov_user_md __user *lump,
git://git.whamcloud.com / fs / lustre-release.git / blobdiff