4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
32 #ifndef OSC_INTERNAL_H
33 #define OSC_INTERNAL_H
35 #define OAP_MAGIC 8675309
37 #include <libcfs/linux/linux-mem.h>
38 #include <lustre_osc.h>
40 extern atomic_t osc_pool_req_count;
41 extern unsigned int osc_reqpool_maxreqcount;
42 extern struct ptlrpc_request_pool *osc_rq_pool;
44 int osc_shrink_grant_to_target(struct client_obd *cli, __u64 target_bytes);
45 void osc_schedule_grant_work(void);
46 void osc_update_next_shrink(struct client_obd *cli);
47 int lru_queue_work(const struct lu_env *env, void *data);
48 int osc_extent_finish(const struct lu_env *env, struct osc_extent *ext,
50 void osc_extent_release(const struct lu_env *env, struct osc_extent *ext);
51 int osc_lock_discard_pages(const struct lu_env *env, struct osc_object *osc,
52 pgoff_t start, pgoff_t end, bool discard);
54 void osc_lock_lvb_update(const struct lu_env *env,
55 struct osc_object *osc,
56 struct ldlm_lock *dlmlock,
59 int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
60 __u64 *flags, union ldlm_policy_data *policy,
61 struct ost_lvb *lvb, osc_enqueue_upcall_f upcall,
62 void *cookie, struct ldlm_enqueue_info *einfo,
63 struct ptlrpc_request_set *rqset, int async,
66 int osc_match_base(const struct lu_env *env, struct obd_export *exp,
67 struct ldlm_res_id *res_id, enum ldlm_type type,
68 union ldlm_policy_data *policy, enum ldlm_mode mode,
69 __u64 *flags, struct osc_object *obj,
70 struct lustre_handle *lockh, enum ldlm_match_flags match_flags);
72 int osc_setattr_async(struct obd_export *exp, struct obdo *oa,
73 obd_enqueue_update_f upcall, void *cookie,
74 struct ptlrpc_request_set *rqset);
75 int osc_fallocate_base(struct obd_export *exp, struct obdo *oa,
76 obd_enqueue_update_f upcall, void *cookie,
78 int osc_sync_base(struct osc_object *obj, struct obdo *oa,
79 obd_enqueue_update_f upcall, void *cookie,
80 struct ptlrpc_request_set *rqset);
81 int osc_ladvise_base(struct obd_export *exp, struct obdo *oa,
82 struct ladvise_hdr *ladvise_hdr,
83 obd_enqueue_update_f upcall, void *cookie,
84 struct ptlrpc_request_set *rqset);
85 int osc_process_config_base(struct obd_device *obd, struct lustre_cfg *cfg);
86 int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
87 struct list_head *ext_list, int cmd);
88 void osc_send_empty_rpc(struct osc_object *osc, pgoff_t start);
89 unsigned long osc_lru_reserve(struct client_obd *cli, unsigned long npages);
90 void osc_lru_unreserve(struct client_obd *cli, unsigned long npages);
92 extern struct lu_kmem_descr osc_caches[];
94 unsigned long osc_ldlm_weigh_ast(struct ldlm_lock *dlmlock);
96 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg);
98 int osc_tunables_init(struct obd_device *obd);
100 extern struct lu_device_type osc_device_type;
102 static inline struct cl_io *osc_env_thread_io(const struct lu_env *env)
104 struct cl_io *io = &osc_env_info(env)->oti_io;
106 memset(io, 0, sizeof(*io));
110 static inline int osc_is_object(const struct lu_object *obj)
112 return obj->lo_dev->ld_type == &osc_device_type;
115 static inline struct osc_lock *osc_lock_at(const struct cl_lock *lock)
117 return cl2osc_lock(cl_lock_at(lock, &osc_device_type));
120 int osc_lock_init(const struct lu_env *env, struct cl_object *obj,
121 struct cl_lock *lock, const struct cl_io *io);
122 int osc_io_init(const struct lu_env *env, struct cl_object *obj,
124 struct lu_object *osc_object_alloc(const struct lu_env *env,
125 const struct lu_object_header *hdr,
126 struct lu_device *dev);
128 static inline int osc_recoverable_error(int rc)
130 return (rc == -EIO || rc == -EROFS || rc == -ENOMEM ||
131 rc == -EAGAIN || rc == -EINPROGRESS);
134 static inline unsigned long rpcs_in_flight(struct client_obd *cli)
136 return cli->cl_r_in_flight + cli->cl_w_in_flight;
139 static inline char *cli_name(struct client_obd *cli)
141 return cli->cl_import->imp_obd->obd_name;
144 static inline char list_empty_marker(struct list_head *list)
146 return list_empty(list) ? '-' : '+';
149 struct osc_async_args {
150 struct obd_info *aa_oi;
153 int osc_quota_setup(struct obd_device *obd);
154 int osc_quota_cleanup(struct obd_device *obd);
155 int osc_quota_setdq(struct client_obd *cli, __u64 xid, const unsigned int qid[],
156 u64 valid, u32 flags);
157 int osc_quota_chkdq(struct client_obd *cli, const unsigned int qid[]);
158 int osc_quotactl(struct obd_device *unused, struct obd_export *exp,
159 struct obd_quotactl *oqctl);
160 void osc_inc_unstable_pages(struct ptlrpc_request *req);
161 void osc_dec_unstable_pages(struct ptlrpc_request *req);
162 bool osc_over_unstable_soft_limit(struct client_obd *cli);
163 void osc_page_touch_at(const struct lu_env *env, struct cl_object *obj,
164 pgoff_t idx, size_t to);
166 struct ldlm_lock *osc_obj_dlmlock_at_pgoff(const struct lu_env *env,
167 struct osc_object *obj,
169 enum osc_dap_flags flags);
171 int osc_object_invalidate(const struct lu_env *env, struct osc_object *osc);
173 /** osc shrink list to link all osc client obd */
174 extern struct list_head osc_shrink_list;
175 /** spin lock to protect osc_shrink_list */
176 extern spinlock_t osc_shrink_lock;
177 extern unsigned long osc_cache_shrink_count(struct shrinker *sk,
178 struct shrink_control *sc);
179 extern unsigned long osc_cache_shrink_scan(struct shrinker *sk,
180 struct shrink_control *sc);
181 static inline unsigned int osc_max_write_chunks(const struct client_obd *cli)
186 * The maximum size of a single transaction is about 64MB in ZFS.
187 * #define DMU_MAX_ACCESS (64 * 1024 * 1024)
189 * Since ZFS is a copy-on-write file system, a single dirty page in
190 * a chunk will result in the rewrite of the whole chunk, therefore
191 * an RPC shouldn't be allowed to contain too many chunks otherwise
192 * it will make transaction size much bigger than 64MB, especially
193 * with big block size for ZFS.
195 * This piece of code is to make sure that OSC won't send write RPCs
196 * with too many chunks. The maximum chunk size that an RPC can cover
197 * is set to PTLRPC_MAX_BRW_SIZE, which is defined to 16MB. Ideally
198 * OST should tell the client what the biggest transaction size is,
199 * but it's good enough for now.
201 * This limitation doesn't apply to ldiskfs, which allows as many
202 * chunks in one RPC as we want. However, it won't have any benefits
203 * to have too many discontiguous pages in one RPC.
205 * An osc_extent won't cover over a RPC size, so the chunks in an
206 * osc_extent won't bigger than PTLRPC_MAX_BRW_SIZE >> chunkbits.
208 return PTLRPC_MAX_BRW_SIZE >> cli->cl_chunkbits;
211 static inline void osc_set_io_portal(struct ptlrpc_request *req)
213 struct obd_import *imp = req->rq_import;
215 /* Distinguish OSC from MDC here to use OST or MDS portal */
216 if (OCD_HAS_FLAG(&imp->imp_connect_data, IBITS))
217 req->rq_request_portal = MDS_IO_PORTAL;
219 req->rq_request_portal = OST_IO_PORTAL;
222 #endif /* OSC_INTERNAL_H */