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13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
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18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2013, 2015, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * Internal definitions for VVP layer.
34 * Author: Nikita Danilov <nikita.danilov@sun.com>
37 #ifndef VVP_INTERNAL_H
38 #define VVP_INTERNAL_H
40 #include <uapi/linux/lustre/lustre_idl.h>
41 #include <cl_object.h>
43 enum obd_notify_event;
51 * IO state private to IO state private to VVP layer.
55 struct cl_io_slice vui_cl;
56 struct cl_io_lock_link vui_link;
58 * I/O vector information to or from which read/write is going.
60 struct iov_iter *vui_iter;
62 * Total size for the left IO.
69 * Inode modification time that is checked across DLM
73 struct vm_area_struct *ft_vma;
75 * locked page returned from vvp_io
77 struct page *ft_vmpage;
81 struct vm_fault *ft_vmf;
83 * fault API used bitflags for return code.
85 unsigned int ft_flags;
87 * check that flags are from filemap_fault
92 struct cl_page_list vui_queue;
93 unsigned long vui_written;
100 * Layout version when this IO is initialized
102 __u32 vui_layout_gen;
104 * File descriptor against which IO is done.
106 struct ll_file_data *vui_fd;
107 struct kiocb *vui_iocb;
109 /* Readahead state. */
110 pgoff_t vui_ra_start;
111 pgoff_t vui_ra_count;
112 /* Set when vui_ra_{start,count} have been initialized. */
116 extern struct lu_device_type vvp_device_type;
118 extern struct lu_context_key vvp_session_key;
119 extern struct lu_context_key vvp_thread_key;
121 extern struct kmem_cache *vvp_lock_kmem;
122 extern struct kmem_cache *vvp_object_kmem;
124 struct vvp_thread_info {
125 struct cl_lock vti_lock;
126 struct cl_lock_descr vti_descr;
128 struct cl_attr vti_attr;
131 static inline struct vvp_thread_info *vvp_env_info(const struct lu_env *env)
133 struct vvp_thread_info *vti;
135 vti = lu_context_key_get(&env->le_ctx, &vvp_thread_key);
141 static inline struct cl_lock *vvp_env_lock(const struct lu_env *env)
143 struct cl_lock *lock = &vvp_env_info(env)->vti_lock;
145 memset(lock, 0, sizeof(*lock));
149 static inline struct cl_attr *vvp_env_thread_attr(const struct lu_env *env)
151 struct cl_attr *attr = &vvp_env_info(env)->vti_attr;
153 memset(attr, 0, sizeof(*attr));
158 static inline struct cl_io *vvp_env_thread_io(const struct lu_env *env)
160 struct cl_io *io = &vvp_env_info(env)->vti_io;
162 memset(io, 0, sizeof(*io));
168 struct vvp_io cs_ios;
171 static inline struct vvp_session *vvp_env_session(const struct lu_env *env)
173 struct vvp_session *ses;
175 ses = lu_context_key_get(env->le_ses, &vvp_session_key);
181 static inline struct vvp_io *vvp_env_io(const struct lu_env *env)
183 return &vvp_env_session(env)->cs_ios;
187 * ccc-private object state.
190 struct cl_object_header vob_header;
191 struct cl_object vob_cl;
192 struct inode *vob_inode;
195 * Number of transient pages. This is no longer protected by i_sem,
196 * and needs to be atomic. This is not actually used for anything,
197 * and can probably be removed.
199 atomic_t vob_transient_pages;
202 * Number of outstanding mmaps on this file.
204 * \see ll_vm_open(), ll_vm_close().
206 atomic_t vob_mmap_cnt;
210 * vob_discard_page_warned
211 * if pages belonging to this object are discarded when a client
212 * is evicted, some debug info will be printed, this flag will be set
213 * during processing the first discarded page, then avoid flooding
214 * debug message for lots of discarded pages.
216 * \see ll_dirty_page_discard_warn.
218 unsigned int vob_discard_page_warned:1;
222 * VVP-private page state.
225 struct cl_page_slice vpg_cl;
226 unsigned int vpg_defer_uptodate:1,
229 struct page *vpg_page;
232 static inline struct vvp_page *cl2vvp_page(const struct cl_page_slice *slice)
234 return container_of(slice, struct vvp_page, vpg_cl);
237 static inline pgoff_t vvp_index(struct vvp_page *vvp)
239 return vvp->vpg_cl.cpl_index;
243 struct cl_device vdv_cl;
244 struct cl_device *vdv_next;
248 struct cl_lock_slice vlk_cl;
251 void *ccc_key_init(const struct lu_context *ctx,
252 struct lu_context_key *key);
253 void ccc_key_fini(const struct lu_context *ctx,
254 struct lu_context_key *key, void *data);
256 void ccc_umount(const struct lu_env *env, struct cl_device *dev);
258 static inline struct lu_device *vvp2lu_dev(struct vvp_device *vdv)
260 return &vdv->vdv_cl.cd_lu_dev;
263 static inline struct vvp_device *lu2vvp_dev(const struct lu_device *d)
265 return container_of0(d, struct vvp_device, vdv_cl.cd_lu_dev);
268 static inline struct vvp_device *cl2vvp_dev(const struct cl_device *d)
270 return container_of0(d, struct vvp_device, vdv_cl);
273 static inline struct vvp_object *cl2vvp(const struct cl_object *obj)
275 return container_of0(obj, struct vvp_object, vob_cl);
278 static inline struct vvp_object *lu2vvp(const struct lu_object *obj)
280 return container_of0(obj, struct vvp_object, vob_cl.co_lu);
283 static inline struct inode *vvp_object_inode(const struct cl_object *obj)
285 return cl2vvp(obj)->vob_inode;
288 int vvp_object_invariant(const struct cl_object *obj);
289 struct vvp_object *cl_inode2vvp(struct inode *inode);
291 static inline struct page *cl2vm_page(const struct cl_page_slice *slice)
293 return cl2vvp_page(slice)->vpg_page;
296 static inline struct vvp_lock *cl2vvp_lock(const struct cl_lock_slice *slice)
298 return container_of(slice, struct vvp_lock, vlk_cl);
301 # define CLOBINVRNT(env, clob, expr) \
302 ((void)sizeof(env), (void)sizeof(clob), (void)sizeof(!!(expr)))
304 int vvp_io_init(const struct lu_env *env, struct cl_object *obj,
306 int vvp_io_write_commit(const struct lu_env *env, struct cl_io *io);
307 int vvp_lock_init(const struct lu_env *env, struct cl_object *obj,
308 struct cl_lock *lock, const struct cl_io *io);
309 int vvp_page_init(const struct lu_env *env, struct cl_object *obj,
310 struct cl_page *page, pgoff_t index);
311 struct lu_object *vvp_object_alloc(const struct lu_env *env,
312 const struct lu_object_header *hdr,
313 struct lu_device *dev);
315 int vvp_global_init(void);
316 void vvp_global_fini(void);
318 extern const struct file_operations vvp_dump_pgcache_file_ops;
320 #endif /* VVP_INTERNAL_H */