* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*/
/*
*
* Author: Mike Pershin <tappro@clusterfs.com>
*/
-
+/**
+ * \defgroup cmm cmm
+ * Cluster Metadata Manager.
+ * Implementation of md interface to provide operation between MDS-es.
+ *
+ * CMM has two set of md methods, one is for local operation which uses MDD,
+ * second is for remote operations to call different MDS.
+ * When object is allocated then proper set of methods are set for it. *
+ * @{
+ */
#ifndef _CMM_INTERNAL_H
#define _CMM_INTERNAL_H
#include <md_object.h>
#include <lustre_acl.h>
-
+/**
+ * md_device extention for CMM layer.
+ */
struct cmm_device {
+ /** md_device instance */
struct md_device cmm_md_dev;
- /* device flags, taken from enum cmm_flags */
+ /** device flags, taken from enum cmm_flags */
__u32 cmm_flags;
- /* underlaying device in MDS stack, usually MDD */
+ /** underlaying device in MDS stack, usually MDD */
struct md_device *cmm_child;
- /* FLD client to talk to FLD */
+ /** FLD client to talk to FLD */
struct lu_client_fld *cmm_fld;
- /* other MD servers in cluster */
+ /** Number of this MDS server in cluster */
mdsno_t cmm_local_num;
+ /** Total number of other MDS */
__u32 cmm_tgt_count;
+ /** linked list of all remove MDS clients */
cfs_list_t cmm_targets;
+ /** lock for cmm_device::cmm_targets operations */
cfs_spinlock_t cmm_tgt_guard;
+ /** /proc entry with CMM data */
cfs_proc_dir_entry_t *cmm_proc_entry;
+ /** CMM statistic */
struct lprocfs_stats *cmm_stats;
};
+/**
+ * CMM flags
+ */
enum cmm_flags {
- /*
- * Device initialization complete.
- */
+ /** Device initialization complete. */
CMM_INITIALIZED = 1 << 0
};
+/**
+ * Wrapper for md_device::md_ops of underlaying device cmm_child.
+ */
static inline const struct md_device_operations *
cmm_child_ops(struct cmm_device *d)
{
return d->cmm_child->md_ops;
}
+/** Wrapper to get cmm_device by contained md_device */
static inline struct cmm_device *md2cmm_dev(struct md_device *m)
{
return container_of0(m, struct cmm_device, cmm_md_dev);
}
+/** Wrapper to get cmm_device by contained lu_device */
static inline struct cmm_device *lu2cmm_dev(struct lu_device *d)
{
return container_of0(d, struct cmm_device, cmm_md_dev.md_lu_dev);
}
+/** Wrapper to get lu_device from cmm_device */
static inline struct lu_device *cmm2lu_dev(struct cmm_device *d)
{
return (&d->cmm_md_dev.md_lu_dev);
}
#ifdef HAVE_SPLIT_SUPPORT
+/**
+ * \ingroup split
+ * States of split operation.
+ */
enum cmm_split_state {
CMM_SPLIT_UNKNOWN,
CMM_SPLIT_NONE,
};
#endif
+/** CMM container for md_object. */
struct cmm_object {
struct md_object cmo_obj;
};
-/* local CMM object */
+/**
+ * \defgroup cml cml
+ * CMM local operations.
+ * @{
+ */
+/**
+ * Local CMM object.
+ */
struct cml_object {
+ /** cmm_object instance. */
struct cmm_object cmm_obj;
#ifdef HAVE_SPLIT_SUPPORT
- /* split state of object (for dirs only)*/
+ /** split state of object (for dirs only) */
enum cmm_split_state clo_split;
#endif
};
+/** @} */
-/* remote CMM object */
+/**
+ * \defgroup cmr cmr
+ * CMM remote operations.
+ * @{
+ */
+/**
+ * Remote CMM object.
+ */
struct cmr_object {
+ /** cmm_object instance */
struct cmm_object cmm_obj;
- /* mds number where object is placed */
+ /** mds number where object is placed */
mdsno_t cmo_num;
};
+/** @} */
enum {
CMM_SPLIT_PAGE_COUNT = 1
};
+/**
+ * CMM thread info.
+ * This is storage for all variables used in CMM functions and it is needed as
+ * stack replacement.
+ */
struct cmm_thread_info {
struct md_attr cmi_ma;
struct lu_buf cmi_buf;
struct lu_fid cmi_fid; /* used for le/cpu conversions */
struct lu_rdpg cmi_rdpg;
- /* pointers to pages for readpage. */
+ /** pointers to pages for readpage. */
struct page *cmi_pages[CMM_SPLIT_PAGE_COUNT];
struct md_op_spec cmi_spec;
struct lmv_stripe_md cmi_lmv;
char cmi_xattr_buf[LUSTRE_POSIX_ACL_MAX_SIZE];
-
- /* Ops object filename */
+ /** Ops object filename */
struct lu_name cti_name;
};
+/**
+ * Wrapper to get cmm_device from cmm_object.
+ */
static inline struct cmm_device *cmm_obj2dev(struct cmm_object *c)
{
return (md2cmm_dev(md_obj2dev(&c->cmo_obj)));
}
+/**
+ * Get cmm_device from related lu_device.
+ */
static inline struct cmm_object *lu2cmm_obj(struct lu_object *o)
{
//LASSERT(lu_device_is_cmm(o->lo_dev));
return container_of0(o, struct cmm_object, cmo_obj.mo_lu);
}
-/* get cmm object from md_object */
+/**
+ * Get cmm object from corresponding md_object.
+ */
static inline struct cmm_object *md2cmm_obj(struct md_object *o)
{
return container_of0(o, struct cmm_object, cmo_obj);
}
-/* get lower-layer object */
+
+/**
+ * Get next lower-layer md_object from current cmm_object.
+ */
static inline struct md_object *cmm2child_obj(struct cmm_object *o)
{
return (o ? lu2md(lu_object_next(&o->cmo_obj.mo_lu)) : NULL);
}
+/**
+ * Extract lu_fid from corresponding cmm_object.
+ */
static inline struct lu_fid* cmm2fid(struct cmm_object *obj)
{
return &(obj->cmo_obj.mo_lu.lo_header->loh_fid);
}
struct cmm_thread_info *cmm_env_info(const struct lu_env *env);
-
-/* cmm_object.c */
struct lu_object *cmm_object_alloc(const struct lu_env *env,
const struct lu_object_header *hdr,
struct lu_device *);
-
-/*
- * local CMM object operations. cml_...
+/**
+ * \addtogroup cml
+ * @{
*/
+/** Get cml_object from lu_object. */
static inline struct cml_object *lu2cml_obj(struct lu_object *o)
{
return container_of0(o, struct cml_object, cmm_obj.cmo_obj.mo_lu);
}
+/** Get cml_object from md_object. */
static inline struct cml_object *md2cml_obj(struct md_object *mo)
{
return container_of0(mo, struct cml_object, cmm_obj.cmo_obj);
}
+/** Get cml_object from cmm_object */
static inline struct cml_object *cmm2cml_obj(struct cmm_object *co)
{
return container_of0(co, struct cml_object, cmm_obj);
}
+/** @} */
int cmm_upcall(const struct lu_env *env, struct md_device *md,
enum md_upcall_event ev, void *data);
#ifdef HAVE_SPLIT_SUPPORT
+/**
+ * \defgroup split split
+ * @{
+ */
#define CMM_MD_SIZE(stripes) (sizeof(struct lmv_stripe_md) + \
(stripes) * sizeof(struct lu_fid))
-/* cmm_split.c */
+/** Get and initialize lu_bug from cmm_thread_info. */
static inline struct lu_buf *cmm_buf_get(const struct lu_env *env,
void *area, ssize_t len)
{
int cmm_split_check(const struct lu_env *env, struct md_object *mp,
const char *name);
-
int cmm_split_expect(const struct lu_env *env, struct md_object *mo,
struct md_attr *ma, int *split);
-
int cmm_split_dir(const struct lu_env *env, struct md_object *mo);
-
int cmm_split_access(const struct lu_env *env, struct md_object *mo,
mdl_mode_t lm);
+/** @} */
#endif
int cmm_fld_lookup(struct cmm_device *cm, const struct lu_fid *fid,
void cmm_lprocfs_time_start(const struct lu_env *env);
void cmm_lprocfs_time_end(const struct lu_env *env, struct cmm_device *cmm,
- int idx);
-
+ int idx);
+/**
+ * CMM counters.
+ */
enum {
LPROC_CMM_SPLIT_CHECK,
LPROC_CMM_SPLIT,
#endif /* __KERNEL__ */
#endif /* _CMM_INTERNAL_H */
+/** @} */
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