--- /dev/null
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ */
+
+#ifndef LOV_INTERNAL_H
+#define LOV_INTERNAL_H
+
+#include "../include/obd_class.h"
+#include "../include/lustre/lustre_user.h"
+
+/* lov_do_div64(a, b) returns a % b, and a = a / b.
+ * The 32-bit code is LOV-specific due to knowing about stripe limits in
+ * order to reduce the divisor to a 32-bit number. If the divisor is
+ * already a 32-bit value the compiler handles this directly. */
+#if BITS_PER_LONG == 64
+# define lov_do_div64(n, base) ({ \
+ uint64_t __base = (base); \
+ uint64_t __rem; \
+ __rem = ((uint64_t)(n)) % __base; \
+ (n) = ((uint64_t)(n)) / __base; \
+ __rem; \
+})
+#elif BITS_PER_LONG == 32
+# define lov_do_div64(n, base) ({ \
+ uint64_t __rem; \
+ if ((sizeof(base) > 4) && (((base) & 0xffffffff00000000ULL) != 0)) { \
+ int __remainder; \
+ LASSERTF(!((base) & (LOV_MIN_STRIPE_SIZE - 1)), "64 bit lov " \
+ "division %llu / %llu\n", (n), (uint64_t)(base)); \
+ __remainder = (n) & (LOV_MIN_STRIPE_SIZE - 1); \
+ (n) >>= LOV_MIN_STRIPE_BITS; \
+ __rem = do_div(n, (base) >> LOV_MIN_STRIPE_BITS); \
+ __rem <<= LOV_MIN_STRIPE_BITS; \
+ __rem += __remainder; \
+ } else { \
+ __rem = do_div(n, base); \
+ } \
+ __rem; \
+})
+#endif
+
+struct lov_lock_handles {
+ struct portals_handle llh_handle;
+ atomic_t llh_refcount;
+ int llh_stripe_count;
+ struct lustre_handle llh_handles[0];
+};
+
+struct lov_request {
+ struct obd_info rq_oi;
+ struct lov_request_set *rq_rqset;
+
+ struct list_head rq_link;
+
+ int rq_idx; /* index in lov->tgts array */
+ int rq_stripe; /* stripe number */
+ int rq_complete;
+ int rq_rc;
+ int rq_buflen; /* length of sub_md */
+
+ u32 rq_oabufs;
+ u32 rq_pgaidx;
+};
+
+struct lov_request_set {
+ struct ldlm_enqueue_info *set_ei;
+ struct obd_info *set_oi;
+ atomic_t set_refcount;
+ struct obd_export *set_exp;
+ /* XXX: There is @set_exp already, however obd_statfs gets obd_device
+ only. */
+ struct obd_device *set_obd;
+ int set_count;
+ atomic_t set_completes;
+ atomic_t set_success;
+ atomic_t set_finish_checked;
+ struct llog_cookie *set_cookies;
+ int set_cookie_sent;
+ struct obd_trans_info *set_oti;
+ u32 set_oabufs;
+ struct brw_page *set_pga;
+ struct lov_lock_handles *set_lockh;
+ struct list_head set_list;
+ wait_queue_head_t set_waitq;
+ spinlock_t set_lock;
+};
+
+extern struct kmem_cache *lov_oinfo_slab;
+
+extern struct lu_kmem_descr lov_caches[];
+
+void lov_finish_set(struct lov_request_set *set);
+
+static inline void lov_get_reqset(struct lov_request_set *set)
+{
+ LASSERT(set != NULL);
+ LASSERT(atomic_read(&set->set_refcount) > 0);
+ atomic_inc(&set->set_refcount);
+}
+
+static inline void lov_put_reqset(struct lov_request_set *set)
+{
+ if (atomic_dec_and_test(&set->set_refcount))
+ lov_finish_set(set);
+}
+
+static inline struct lov_lock_handles *
+lov_handle2llh(struct lustre_handle *handle)
+{
+ LASSERT(handle != NULL);
+ return class_handle2object(handle->cookie);
+}
+
+static inline void lov_llh_put(struct lov_lock_handles *llh)
+{
+ CDEBUG(D_INFO, "PUTting llh %p : new refcount %d\n", llh,
+ atomic_read(&llh->llh_refcount) - 1);
+ LASSERT(atomic_read(&llh->llh_refcount) > 0 &&
+ atomic_read(&llh->llh_refcount) < 0x5a5a);
+ if (atomic_dec_and_test(&llh->llh_refcount)) {
+ class_handle_unhash(&llh->llh_handle);
+ /* The structure may be held by other threads because RCU.
+ * -jxiong */
+ if (atomic_read(&llh->llh_refcount))
+ return;
+
+ OBD_FREE_RCU(llh, sizeof(*llh) +
+ sizeof(*llh->llh_handles) * llh->llh_stripe_count,
+ &llh->llh_handle);
+ }
+}
+
+#define lov_uuid2str(lv, index) \
+ (char *)((lv)->lov_tgts[index]->ltd_uuid.uuid)
+
+/* lov_merge.c */
+void lov_merge_attrs(struct obdo *tgt, struct obdo *src, u64 valid,
+ struct lov_stripe_md *lsm, int stripeno, int *set);
+int lov_adjust_kms(struct obd_export *exp, struct lov_stripe_md *lsm,
+ u64 size, int shrink);
+int lov_merge_lvb_kms(struct lov_stripe_md *lsm,
+ struct ost_lvb *lvb, __u64 *kms_place);
+
+/* lov_offset.c */
+u64 lov_stripe_size(struct lov_stripe_md *lsm, u64 ost_size,
+ int stripeno);
+int lov_stripe_offset(struct lov_stripe_md *lsm, u64 lov_off,
+ int stripeno, u64 *u64);
+u64 lov_size_to_stripe(struct lov_stripe_md *lsm, u64 file_size,
+ int stripeno);
+int lov_stripe_intersects(struct lov_stripe_md *lsm, int stripeno,
+ u64 start, u64 end,
+ u64 *obd_start, u64 *obd_end);
+int lov_stripe_number(struct lov_stripe_md *lsm, u64 lov_off);
+
+/* lov_qos.c */
+#define LOV_USES_ASSIGNED_STRIPE 0
+#define LOV_USES_DEFAULT_STRIPE 1
+int qos_add_tgt(struct obd_device *obd, __u32 index);
+int qos_del_tgt(struct obd_device *obd, struct lov_tgt_desc *tgt);
+void qos_shrink_lsm(struct lov_request_set *set);
+int qos_prep_create(struct obd_export *exp, struct lov_request_set *set);
+void qos_update(struct lov_obd *lov);
+void qos_statfs_done(struct lov_obd *lov);
+void qos_statfs_update(struct obd_device *obd, __u64 max_age, int wait);
+int qos_remedy_create(struct lov_request_set *set, struct lov_request *req);
+
+/* lov_request.c */
+void lov_set_add_req(struct lov_request *req, struct lov_request_set *set);
+int lov_set_finished(struct lov_request_set *set, int idempotent);
+void lov_update_set(struct lov_request_set *set,
+ struct lov_request *req, int rc);
+int lov_update_common_set(struct lov_request_set *set,
+ struct lov_request *req, int rc);
+int lov_check_and_wait_active(struct lov_obd *lov, int ost_idx);
+int lov_prep_getattr_set(struct obd_export *exp, struct obd_info *oinfo,
+ struct lov_request_set **reqset);
+int lov_fini_getattr_set(struct lov_request_set *set);
+int lov_prep_destroy_set(struct obd_export *exp, struct obd_info *oinfo,
+ struct obdo *src_oa, struct lov_stripe_md *lsm,
+ struct obd_trans_info *oti,
+ struct lov_request_set **reqset);
+int lov_fini_destroy_set(struct lov_request_set *set);
+int lov_prep_setattr_set(struct obd_export *exp, struct obd_info *oinfo,
+ struct obd_trans_info *oti,
+ struct lov_request_set **reqset);
+int lov_update_setattr_set(struct lov_request_set *set,
+ struct lov_request *req, int rc);
+int lov_fini_setattr_set(struct lov_request_set *set);
+int lov_prep_statfs_set(struct obd_device *obd, struct obd_info *oinfo,
+ struct lov_request_set **reqset);
+void lov_update_statfs(struct obd_statfs *osfs, struct obd_statfs *lov_sfs,
+ int success);
+int lov_fini_statfs(struct obd_device *obd, struct obd_statfs *osfs,
+ int success);
+int lov_fini_statfs_set(struct lov_request_set *set);
+int lov_statfs_interpret(struct ptlrpc_request_set *rqset, void *data, int rc);
+
+/* lov_obd.c */
+void lov_fix_desc(struct lov_desc *desc);
+void lov_fix_desc_stripe_size(__u64 *val);
+void lov_fix_desc_stripe_count(__u32 *val);
+void lov_fix_desc_pattern(__u32 *val);
+void lov_fix_desc_qos_maxage(__u32 *val);
+__u16 lov_get_stripecnt(struct lov_obd *lov, __u32 magic, __u16 stripe_count);
+int lov_connect_obd(struct obd_device *obd, __u32 index, int activate,
+ struct obd_connect_data *data);
+int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg);
+int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
+ __u32 *indexp, int *genp);
+int lov_del_target(struct obd_device *obd, __u32 index,
+ struct obd_uuid *uuidp, int gen);
+
+/* lov_pack.c */
+int lov_packmd(struct obd_export *exp, struct lov_mds_md **lmm,
+ struct lov_stripe_md *lsm);
+int lov_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
+ struct lov_mds_md *lmm, int lmm_bytes);
+int lov_getstripe(struct obd_export *exp,
+ struct lov_stripe_md *lsm, struct lov_user_md *lump);
+int lov_alloc_memmd(struct lov_stripe_md **lsmp, __u16 stripe_count,
+ int pattern, int magic);
+int lov_free_memmd(struct lov_stripe_md **lsmp);
+
+void lov_dump_lmm_v1(int level, struct lov_mds_md_v1 *lmm);
+void lov_dump_lmm_v3(int level, struct lov_mds_md_v3 *lmm);
+void lov_dump_lmm_common(int level, void *lmmp);
+void lov_dump_lmm(int level, void *lmm);
+
+/* lov_ea.c */
+struct lov_stripe_md *lsm_alloc_plain(__u16 stripe_count, int *size);
+void lsm_free_plain(struct lov_stripe_md *lsm);
+void dump_lsm(unsigned int level, const struct lov_stripe_md *lsm);
+
+/* lproc_lov.c */
+#if defined (CONFIG_PROC_FS)
+extern const struct file_operations lov_proc_target_fops;
+void lprocfs_lov_init_vars(struct lprocfs_static_vars *lvars);
+#else
+static inline void lprocfs_lov_init_vars(struct lprocfs_static_vars *lvars)
+{
+ memset(lvars, 0, sizeof(*lvars));
+}
+#endif
+
+/* lov_cl.c */
+extern struct lu_device_type lov_device_type;
+
+/* pools */
+extern cfs_hash_ops_t pool_hash_operations;
+/* ost_pool methods */
+int lov_ost_pool_init(struct ost_pool *op, unsigned int count);
+int lov_ost_pool_extend(struct ost_pool *op, unsigned int min_count);
+int lov_ost_pool_add(struct ost_pool *op, __u32 idx, unsigned int min_count);
+int lov_ost_pool_remove(struct ost_pool *op, __u32 idx);
+int lov_ost_pool_free(struct ost_pool *op);
+
+/* high level pool methods */
+int lov_pool_new(struct obd_device *obd, char *poolname);
+int lov_pool_del(struct obd_device *obd, char *poolname);
+int lov_pool_add(struct obd_device *obd, char *poolname, char *ostname);
+int lov_pool_remove(struct obd_device *obd, char *poolname, char *ostname);
+void lov_dump_pool(int level, struct pool_desc *pool);
+struct pool_desc *lov_find_pool(struct lov_obd *lov, char *poolname);
+int lov_check_index_in_pool(__u32 idx, struct pool_desc *pool);
+void lov_pool_putref(struct pool_desc *pool);
+
+static inline struct lov_stripe_md *lsm_addref(struct lov_stripe_md *lsm)
+{
+ LASSERT(atomic_read(&lsm->lsm_refc) > 0);
+ atomic_inc(&lsm->lsm_refc);
+ return lsm;
+}
+
+static inline bool lov_oinfo_is_dummy(const struct lov_oinfo *loi)
+{
+ if (unlikely(loi->loi_oi.oi.oi_id == 0 &&
+ loi->loi_oi.oi.oi_seq == 0 &&
+ loi->loi_ost_idx == 0 &&
+ loi->loi_ost_gen == 0))
+ return true;
+
+ return false;
+}
+
+
+#endif
Code Review / kvmfornfv.git / blobdiff