* Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2011, Whamcloud, Inc.
+ * Copyright (c) 2011, 2013, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#include <lustre/lustre_idl.h>
#include <obd.h>
+#include <lustre_lmv.h>
#define LMV_MAX_TGT_COUNT 128
-#define lmv_init_lock(lmv) cfs_mutex_lock(&lmv->init_mutex);
-#define lmv_init_unlock(lmv) cfs_mutex_unlock(&lmv->init_mutex);
+#define lmv_init_lock(lmv) mutex_lock(&lmv->init_mutex);
+#define lmv_init_unlock(lmv) mutex_unlock(&lmv->init_mutex);
#define LL_IT2STR(it) \
((it) ? ldlm_it2str((it)->it_op) : "0")
-struct lmv_stripe {
- /**
- * Dir stripe fid.
- */
- struct lu_fid ls_fid;
- /**
- * Cached home mds number for \a li_fid.
- */
- mdsno_t ls_mds;
- /**
- * Stripe object size.
- */
- unsigned long ls_size;
- /**
- * Stripe flags.
- */
- int ls_flags;
-};
-
-#define O_FREEING (1 << 0)
-
-struct lmv_object {
- /**
- * Link to global objects list.
- */
- cfs_list_t lo_list;
- /**
- * Sema for protecting fields.
- */
- cfs_mutex_t lo_guard;
- /**
- * Object state like O_FREEING.
- */
- int lo_state;
- /**
- * Object ref counter.
- */
- cfs_atomic_t lo_count;
- /**
- * Object master fid.
- */
- struct lu_fid lo_fid;
- /**
- * Object hash type to find stripe by name.
- */
- __u32 lo_hashtype;
- /**
- * Number of stripes.
- */
- int lo_objcount;
- /**
- * Array of sub-objs.
- */
- struct lmv_stripe *lo_stripes;
- /**
- * Pointer to LMV obd.
- */
- struct obd_device *lo_obd;
-};
-
-int lmv_object_setup(struct obd_device *obd);
-void lmv_object_cleanup(struct obd_device *obd);
-
-static inline void
-lmv_object_lock(struct lmv_object *obj)
-{
- LASSERT(obj);
- cfs_mutex_lock(&obj->lo_guard);
-}
-
-static inline void
-lmv_object_unlock(struct lmv_object *obj)
-{
- LASSERT(obj);
- cfs_mutex_unlock(&obj->lo_guard);
-}
-
-void lmv_object_add(struct lmv_object *obj);
-void lmv_object_del(struct lmv_object *obj);
-
-void lmv_object_put(struct lmv_object *obj);
-void lmv_object_put_unlock(struct lmv_object *obj);
-void lmv_object_free(struct lmv_object *obj);
-
-struct lmv_object *lmv_object_get(struct lmv_object *obj);
-
-struct lmv_object *lmv_object_find(struct obd_device *obd,
- const struct lu_fid *fid);
-
-struct lmv_object *lmv_object_find_lock(struct obd_device *obd,
- const struct lu_fid *fid);
-
-struct lmv_object *lmv_object_alloc(struct obd_device *obd,
- const struct lu_fid *fid,
- struct lmv_stripe_md *mea);
-
-struct lmv_object *lmv_object_create(struct obd_export *exp,
- const struct lu_fid *fid,
- struct lmv_stripe_md *mea);
-
-int lmv_object_delete(struct obd_export *exp,
- const struct lu_fid *fid);
-
int lmv_check_connect(struct obd_device *obd);
int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
ldlm_blocking_callback cb_blocking,
__u64 extra_lock_flags);
-int lmv_allocate_slaves(struct obd_device *obd, struct lu_fid *pid,
- struct md_op_data *op, struct lu_fid *fid);
-
-int lmv_revalidate_slaves(struct obd_export *, struct ptlrpc_request **,
- const struct lu_fid *, struct lookup_intent *, int,
- ldlm_blocking_callback cb_blocking,
- __u64 extra_lock_flags);
-
-int lmv_handle_split(struct obd_export *, const struct lu_fid *);
int lmv_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
void *, int);
int lmv_fld_lookup(struct lmv_obd *lmv, const struct lu_fid *fid,
int lmv_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
struct md_op_data *op_data);
-static inline struct lmv_stripe_md *lmv_get_mea(struct ptlrpc_request *req)
+static inline struct lmv_tgt_desc *
+lmv_get_target(struct lmv_obd *lmv, mdsno_t mds)
{
- struct mdt_body *body;
- struct lmv_stripe_md *mea;
-
- LASSERT(req != NULL);
-
- body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
-
- if (!body || !S_ISDIR(body->mode) || !body->eadatasize)
- return NULL;
-
- mea = req_capsule_server_sized_get(&req->rq_pill, &RMF_MDT_MD,
- body->eadatasize);
- LASSERT(mea != NULL);
+ int count = lmv->desc.ld_tgt_count;
+ int i;
- if (mea->mea_count == 0)
- return NULL;
- if( mea->mea_magic != MEA_MAGIC_LAST_CHAR &&
- mea->mea_magic != MEA_MAGIC_ALL_CHARS &&
- mea->mea_magic != MEA_MAGIC_HASH_SEGMENT)
- return NULL;
+ for (i = 0; i < count; i++) {
+ if (lmv->tgts[i] == NULL)
+ continue;
- return mea;
-}
-
-static inline int lmv_get_easize(struct lmv_obd *lmv)
-{
- return sizeof(struct lmv_stripe_md) +
- lmv->desc.ld_tgt_count *
- sizeof(struct lu_fid);
-}
+ if (lmv->tgts[i]->ltd_idx == mds)
+ return lmv->tgts[i];
+ }
-static inline struct lmv_tgt_desc *
-lmv_get_target(struct lmv_obd *lmv, mdsno_t mds)
-{
- return &lmv->tgts[mds];
+ return ERR_PTR(-ENODEV);
}
static inline struct lmv_tgt_desc *
return lmv_get_target(lmv, mds);
}
-/* lproc_lmv.c */
-#ifdef LPROCFS
-void lprocfs_lmv_init_vars(struct lprocfs_static_vars *lvars);
-#else
-static inline void lprocfs_lmv_init_vars(struct lprocfs_static_vars *lvars)
+static inline unsigned int
+mea_last_char_hash(unsigned int count, const char *name, int namelen)
+{
+ unsigned int c;
+
+ c = name[namelen - 1];
+ if (c == 0)
+ CWARN("invalid name %.*s\n", namelen, name);
+
+ c = c % count;
+
+ return c;
+}
+
+static inline unsigned int
+mea_all_chars_hash(unsigned int count, const char *name, int namelen)
{
- memset(lvars, 0, sizeof(*lvars));
+ unsigned int c = 0;
+
+ while (--namelen >= 0)
+ c += name[namelen];
+
+ c = c % count;
+
+ return c;
}
+
+static inline int lmv_stripe_md_size(int stripe_count)
+{
+ struct lmv_stripe_md *lsm;
+
+ return sizeof(*lsm) + stripe_count * sizeof(lsm->lsm_md_oinfo[0]);
+}
+
+int raw_name2idx(int hashtype, int count, const char *name, int namelen);
+
+struct lmv_tgt_desc
+*lmv_locate_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
+ struct lu_fid *fid);
+/* lproc_lmv.c */
+#ifdef LPROCFS
+extern struct lprocfs_seq_vars lprocfs_lmv_obd_vars[];
#endif
extern struct file_operations lmv_proc_target_fops;