/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * 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 2008 Sun Microsystems, Inc. All rights reserved * Use is subject to license terms. */ /* * This file is part of Lustre, http://www.lustre.org/ * Lustre is a trademark of Sun Microsystems, Inc. */ #ifndef OSC_INTERNAL_H #define OSC_INTERNAL_H #define OAP_MAGIC 8675309 struct lu_env; enum async_flags { ASYNC_READY = 0x1, /* ap_make_ready will not be called before this page is added to an rpc */ ASYNC_URGENT = 0x2, /* page must be put into an RPC before return */ ASYNC_COUNT_STABLE = 0x4, /* ap_refresh_count will not be called to give the caller a chance to update or cancel the size of the io */ ASYNC_HP = 0x10, }; struct obd_async_page_ops { int (*ap_make_ready)(const struct lu_env *env, void *data, int cmd); int (*ap_refresh_count)(const struct lu_env *env, void *data, int cmd); int (*ap_completion)(const struct lu_env *env, void *data, int cmd, struct obdo *oa, int rc); }; struct osc_async_page { int oap_magic; unsigned short oap_cmd; unsigned short oap_interrupted:1; struct list_head oap_pending_item; struct list_head oap_urgent_item; struct list_head oap_rpc_item; obd_off oap_obj_off; unsigned oap_page_off; enum async_flags oap_async_flags; struct brw_page oap_brw_page; struct ptlrpc_request *oap_request; struct client_obd *oap_cli; struct lov_oinfo *oap_loi; const struct obd_async_page_ops *oap_caller_ops; void *oap_caller_data; struct list_head oap_page_list; struct ldlm_lock *oap_ldlm_lock; spinlock_t oap_lock; }; #define oap_page oap_brw_page.pg #define oap_count oap_brw_page.count #define oap_brw_flags oap_brw_page.flag struct osc_cache_waiter { struct list_head ocw_entry; cfs_waitq_t ocw_waitq; struct osc_async_page *ocw_oap; int ocw_rc; }; #define OSCC_FLAG_RECOVERING 0x01 #define OSCC_FLAG_CREATING 0x02 #define OSCC_FLAG_NOSPC 0x04 /* can't create more objects on OST */ #define OSCC_FLAG_SYNC_IN_PROGRESS 0x08 /* only allow one thread to sync */ #define OSCC_FLAG_LOW 0x10 #define OSCC_FLAG_EXITING 0x20 #define OSCC_FLAG_DEGRADED 0x40 #define OSCC_FLAG_RDONLY 0x80 int osc_precreate(struct obd_export *exp); int osc_create(struct obd_export *exp, struct obdo *oa, struct lov_stripe_md **ea, struct obd_trans_info *oti); int osc_create_async(struct obd_export *exp, struct obd_info *oinfo, struct lov_stripe_md **ea, struct obd_trans_info *oti); int osc_real_create(struct obd_export *exp, struct obdo *oa, struct lov_stripe_md **ea, struct obd_trans_info *oti); void oscc_init(struct obd_device *obd); void osc_wake_cache_waiters(struct client_obd *cli); int osc_shrink_grant_to_target(struct client_obd *cli, long target); /* * cl integration. */ #include extern struct ptlrpc_request_set *PTLRPCD_SET; int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id, int *flags, ldlm_policy_data_t *policy, struct ost_lvb *lvb, int kms_valid, obd_enqueue_update_f upcall, void *cookie, struct ldlm_enqueue_info *einfo, struct lustre_handle *lockh, struct ptlrpc_request_set *rqset, int async); int osc_cancel_base(struct lustre_handle *lockh, __u32 mode); int osc_match_base(struct obd_export *exp, struct ldlm_res_id *res_id, __u32 type, ldlm_policy_data_t *policy, __u32 mode, int *flags, void *data, struct lustre_handle *lockh, int unref); int osc_punch_base(struct obd_export *exp, struct obdo *oa, struct obd_capa *capa, obd_enqueue_update_f upcall, void *cookie, struct ptlrpc_request_set *rqset); int osc_prep_async_page(struct obd_export *exp, struct lov_stripe_md *lsm, struct lov_oinfo *loi, cfs_page_t *page, obd_off offset, const struct obd_async_page_ops *ops, void *data, void **res, int nocache, struct lustre_handle *lockh); void osc_oap_to_pending(struct osc_async_page *oap); int osc_oap_interrupted(const struct lu_env *env, struct osc_async_page *oap); void loi_list_maint(struct client_obd *cli, struct lov_oinfo *loi); void osc_check_rpcs(const struct lu_env *env, struct client_obd *cli); int osc_queue_async_io(const struct lu_env *env, struct obd_export *exp, struct lov_stripe_md *lsm, struct lov_oinfo *loi, void *cookie, int cmd, obd_off off, int count, obd_flag brw_flags, enum async_flags async_flags); int osc_teardown_async_page(struct obd_export *exp, struct lov_stripe_md *lsm, struct lov_oinfo *loi, void *cookie); int osc_process_config_base(struct obd_device *obd, struct lustre_cfg *cfg); int osc_set_async_flags_base(struct client_obd *cli, struct lov_oinfo *loi, struct osc_async_page *oap, obd_flag async_flags); int osc_enter_cache_try(const struct lu_env *env, struct client_obd *cli, struct lov_oinfo *loi, struct osc_async_page *oap, int transient); struct cl_page *osc_oap2cl_page(struct osc_async_page *oap); extern spinlock_t osc_ast_guard; int osc_cleanup(struct obd_device *obd); int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg); #ifdef LPROCFS int lproc_osc_attach_seqstat(struct obd_device *dev); void lprocfs_osc_init_vars(struct lprocfs_static_vars *lvars); #else static inline int lproc_osc_attach_seqstat(struct obd_device *dev) {return 0;} static inline void lprocfs_osc_init_vars(struct lprocfs_static_vars *lvars) { memset(lvars, 0, sizeof(*lvars)); } #endif extern struct lu_device_type osc_device_type; static inline int osc_recoverable_error(int rc) { return (rc == -EIO || rc == -EROFS || rc == -ENOMEM || rc == -EAGAIN); } /* return 1 if osc should be resend request */ static inline int osc_should_resend(int resend, struct client_obd *cli) { return atomic_read(&cli->cl_resends) ? atomic_read(&cli->cl_resends) > resend : 1; } #ifndef min_t #define min_t(type,x,y) \ ({ type __x = (x); type __y = (y); __x < __y ? __x: __y; }) #endif struct osc_device { struct cl_device od_cl; struct obd_export *od_exp; /* Write stats is actually protected by client_obd's lock. */ struct osc_stats { uint64_t os_lockless_writes; /* by bytes */ uint64_t os_lockless_reads; /* by bytes */ uint64_t os_lockless_truncates; /* by times */ } od_stats; /* configuration item(s) */ int od_contention_time; int od_lockless_truncate; }; static inline struct osc_device *obd2osc_dev(const struct obd_device *d) { return container_of0(d->obd_lu_dev, struct osc_device, od_cl.cd_lu_dev); } #endif /* OSC_INTERNAL_H */