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27 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
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30 * Copyright (c) 2013, 2014, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * Internal definitions for VVP layer.
38 * Author: Nikita Danilov <nikita.danilov@sun.com>
41 #ifndef VVP_INTERNAL_H
42 #define VVP_INTERNAL_H
44 #include <lustre/lustre_idl.h>
45 #include <cl_object.h>
47 enum obd_notify_event;
59 /** io started from splice_{read|write} */
64 * IO state private to VVP layer.
68 struct cl_io_slice vui_cl;
69 struct cl_io_lock_link vui_link;
71 * I/O vector information to or from which read/write is going.
73 struct iovec *vui_iov;
74 unsigned long vui_nrsegs;
76 * Total iov count for left IO.
78 unsigned long vui_tot_nrsegs;
80 * Old length for iov that was truncated partially.
84 * Total size for the left IO.
91 * Inode modification time that is checked across DLM
95 struct vm_area_struct *ft_vma;
97 * locked page returned from vvp_io
99 struct page *ft_vmpage;
103 struct vm_fault *ft_vmf;
105 * fault API used bitflags for return code.
107 unsigned int ft_flags;
109 * check that flags are from filemap_fault
114 struct pipe_inode_info *vui_pipe;
115 unsigned int vui_flags;
118 struct cl_page_list vui_queue;
119 unsigned long vui_written;
125 enum vvp_io_subtype vui_io_subtype;
128 * Layout version when this IO is initialized
130 __u32 vui_layout_gen;
132 * File descriptor against which IO is done.
134 struct ll_file_data *vui_fd;
135 struct kiocb *vui_iocb;
137 /* Readahead state. */
138 pgoff_t vui_ra_start;
139 pgoff_t vui_ra_count;
140 /* Set when vui_ra_{start,count} have been initialized. */
144 extern struct lu_device_type vvp_device_type;
146 extern struct lu_context_key vvp_session_key;
147 extern struct lu_context_key vvp_thread_key;
149 extern struct kmem_cache *vvp_lock_kmem;
150 extern struct kmem_cache *vvp_object_kmem;
151 extern struct kmem_cache *vvp_req_kmem;
153 struct vvp_thread_info {
154 struct cl_lock vti_lock;
155 struct cl_lock_descr vti_descr;
157 struct cl_attr vti_attr;
160 static inline struct vvp_thread_info *vvp_env_info(const struct lu_env *env)
162 struct vvp_thread_info *vti;
164 vti = lu_context_key_get(&env->le_ctx, &vvp_thread_key);
165 LASSERT(vti != NULL);
170 static inline struct cl_lock *vvp_env_lock(const struct lu_env *env)
172 struct cl_lock *lock = &vvp_env_info(env)->vti_lock;
174 memset(lock, 0, sizeof(*lock));
179 static inline struct cl_attr *vvp_env_thread_attr(const struct lu_env *env)
181 struct cl_attr *attr = &vvp_env_info(env)->vti_attr;
183 memset(attr, 0, sizeof(*attr));
188 static inline struct cl_io *vvp_env_thread_io(const struct lu_env *env)
190 struct cl_io *io = &vvp_env_info(env)->vti_io;
192 memset(io, 0, sizeof(*io));
198 struct vvp_io vs_ios;
201 static inline struct vvp_session *vvp_env_session(const struct lu_env *env)
203 struct vvp_session *ses;
205 ses = lu_context_key_get(env->le_ses, &vvp_session_key);
206 LASSERT(ses != NULL);
211 static inline struct vvp_io *vvp_env_io(const struct lu_env *env)
213 return &vvp_env_session(env)->vs_ios;
217 * VPP-private object state.
220 struct cl_object_header vob_header;
221 struct cl_object vob_cl;
222 struct inode *vob_inode;
225 * Number of transient pages. This is no longer protected by i_sem,
226 * and needs to be atomic. This is not actually used for anything,
227 * and can probably be removed.
229 atomic_t vob_transient_pages;
231 * Number of outstanding mmaps on this file.
233 * \see ll_vm_open(), ll_vm_close().
235 atomic_t vob_mmap_cnt;
239 * vob_discard_page_warned
240 * if pages belonging to this object are discarded when a client
241 * is evicted, some debug info will be printed, this flag will be set
242 * during processing the first discarded page, then avoid flooding
243 * debug message for lots of discarded pages.
245 * \see ll_dirty_page_discard_warn.
247 unsigned int vob_discard_page_warned:1;
251 * VVP-private page state.
254 struct cl_page_slice vpg_cl;
255 unsigned vpg_defer_uptodate:1,
258 struct page *vpg_page;
261 static inline struct vvp_page *cl2vvp_page(const struct cl_page_slice *slice)
263 return container_of(slice, struct vvp_page, vpg_cl);
266 static inline pgoff_t vvp_index(struct vvp_page *vpg)
268 return vpg->vpg_cl.cpl_index;
272 struct cl_device vdv_cl;
273 struct super_block *vdv_sb;
274 struct cl_device *vdv_next;
278 struct cl_lock_slice vlk_cl;
282 struct cl_req_slice vrq_cl;
285 static inline struct lu_device *vvp2lu_dev(struct vvp_device *vdv)
287 return &vdv->vdv_cl.cd_lu_dev;
290 static inline struct vvp_device *lu2vvp_dev(const struct lu_device *d)
292 return container_of0(d, struct vvp_device, vdv_cl.cd_lu_dev);
295 static inline struct vvp_device *cl2vvp_dev(const struct cl_device *d)
297 return container_of0(d, struct vvp_device, vdv_cl);
300 static inline struct vvp_object *cl2vvp(const struct cl_object *obj)
302 return container_of0(obj, struct vvp_object, vob_cl);
305 static inline struct vvp_object *lu2vvp(const struct lu_object *obj)
307 return container_of0(obj, struct vvp_object, vob_cl.co_lu);
310 static inline struct inode *vvp_object_inode(const struct cl_object *obj)
312 return cl2vvp(obj)->vob_inode;
315 int vvp_object_invariant(const struct cl_object *obj);
316 struct vvp_object *cl_inode2vvp(struct inode *inode);
318 static inline struct page *cl2vm_page(const struct cl_page_slice *slice)
320 return cl2vvp_page(slice)->vpg_page;
323 static inline struct vvp_lock *cl2vvp_lock(const struct cl_lock_slice *slice)
325 return container_of(slice, struct vvp_lock, vlk_cl);
328 #ifdef CONFIG_LUSTRE_DEBUG_EXPENSIVE_CHECK
329 # define CLOBINVRNT(env, clob, expr) \
331 if (unlikely(!(expr))) { \
332 LU_OBJECT_DEBUG(D_ERROR, (env), &(clob)->co_lu, \
337 #else /* !CONFIG_LUSTRE_DEBUG_EXPENSIVE_CHECK */
338 # define CLOBINVRNT(env, clob, expr) \
339 ((void)sizeof(env), (void)sizeof(clob), (void)sizeof !!(expr))
340 #endif /* CONFIG_LUSTRE_DEBUG_EXPENSIVE_CHECK */
342 int lov_read_and_clear_async_rc(struct cl_object *clob);
344 int vvp_io_init(const struct lu_env *env, struct cl_object *obj,
346 int vvp_io_write_commit(const struct lu_env *env, struct cl_io *io);
347 int vvp_lock_init(const struct lu_env *env, struct cl_object *obj,
348 struct cl_lock *lock, const struct cl_io *io);
349 int vvp_page_init(const struct lu_env *env, struct cl_object *obj,
350 struct cl_page *page, pgoff_t index);
351 int vvp_req_init(const struct lu_env *env, struct cl_device *dev,
353 struct lu_object *vvp_object_alloc(const struct lu_env *env,
354 const struct lu_object_header *hdr,
355 struct lu_device *dev);
357 int vvp_global_init(void);
358 void vvp_global_fini(void);
360 extern const struct file_operations vvp_dump_pgcache_file_ops;
362 #endif /* VVP_INTERNAL_H */