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11 * WITHOUT ANY WARRANTY; without even the implied warranty of
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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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21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
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;
57 /** io started from splice_{read|write} */
62 * IO state private to VVP layer.
66 struct cl_io_slice vui_cl;
67 struct cl_io_lock_link vui_link;
69 * I/O vector information to or from which read/write is going.
71 struct iov_iter *vui_iter;
72 #ifndef HAVE_FILE_OPERATIONS_READ_WRITE_ITER
74 * Total iov count for left IO.
76 unsigned long vui_tot_nrsegs;
78 * Old length for iov that was truncated partially.
81 #endif /* !HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
83 * Total size for the left IO.
90 * Inode modification time that is checked across DLM
94 struct vm_area_struct *ft_vma;
96 * locked page returned from vvp_io
98 struct page *ft_vmpage;
102 struct vm_fault *ft_vmf;
104 * fault API used bitflags for return code.
106 unsigned int ft_flags;
108 * check that flags are from filemap_fault
113 struct pipe_inode_info *vui_pipe;
114 unsigned int vui_flags;
117 struct cl_page_list vui_queue;
118 unsigned long vui_written;
124 enum vvp_io_subtype vui_io_subtype;
127 * Layout version when this IO is initialized
129 __u32 vui_layout_gen;
131 * File descriptor against which IO is done.
133 struct ll_file_data *vui_fd;
134 struct kiocb *vui_iocb;
136 /* Readahead state. */
137 pgoff_t vui_ra_start;
138 pgoff_t vui_ra_count;
139 /* Set when vui_ra_{start,count} have been initialized. */
143 extern struct lu_device_type vvp_device_type;
145 extern struct lu_context_key vvp_session_key;
146 extern struct lu_context_key vvp_thread_key;
148 extern struct kmem_cache *vvp_lock_kmem;
149 extern struct kmem_cache *vvp_object_kmem;
151 struct vvp_thread_info {
152 struct cl_lock vti_lock;
153 struct cl_lock_descr vti_descr;
155 struct cl_attr vti_attr;
158 static inline struct vvp_thread_info *vvp_env_info(const struct lu_env *env)
160 struct vvp_thread_info *vti;
162 vti = lu_context_key_get(&env->le_ctx, &vvp_thread_key);
163 LASSERT(vti != NULL);
168 static inline struct cl_lock *vvp_env_lock(const struct lu_env *env)
170 struct cl_lock *lock = &vvp_env_info(env)->vti_lock;
172 memset(lock, 0, sizeof(*lock));
177 static inline struct cl_attr *vvp_env_thread_attr(const struct lu_env *env)
179 struct cl_attr *attr = &vvp_env_info(env)->vti_attr;
181 memset(attr, 0, sizeof(*attr));
186 static inline struct cl_io *vvp_env_thread_io(const struct lu_env *env)
188 struct cl_io *io = &vvp_env_info(env)->vti_io;
190 memset(io, 0, sizeof(*io));
196 struct vvp_io vs_ios;
199 static inline struct vvp_session *vvp_env_session(const struct lu_env *env)
201 struct vvp_session *ses;
203 ses = lu_context_key_get(env->le_ses, &vvp_session_key);
204 LASSERT(ses != NULL);
209 static inline struct vvp_io *vvp_env_io(const struct lu_env *env)
211 return &vvp_env_session(env)->vs_ios;
215 * VPP-private object state.
218 struct cl_object_header vob_header;
219 struct cl_object vob_cl;
220 struct inode *vob_inode;
223 * Number of transient pages. This is no longer protected by i_sem,
224 * and needs to be atomic. This is not actually used for anything,
225 * and can probably be removed.
227 atomic_t vob_transient_pages;
229 * Number of outstanding mmaps on this file.
231 * \see ll_vm_open(), ll_vm_close().
233 atomic_t vob_mmap_cnt;
237 * vob_discard_page_warned
238 * if pages belonging to this object are discarded when a client
239 * is evicted, some debug info will be printed, this flag will be set
240 * during processing the first discarded page, then avoid flooding
241 * debug message for lots of discarded pages.
243 * \see ll_dirty_page_discard_warn.
245 unsigned int vob_discard_page_warned:1;
249 * VVP-private page state.
252 struct cl_page_slice vpg_cl;
253 unsigned vpg_defer_uptodate:1,
256 struct page *vpg_page;
259 static inline struct vvp_page *cl2vvp_page(const struct cl_page_slice *slice)
261 return container_of(slice, struct vvp_page, vpg_cl);
264 static inline pgoff_t vvp_index(struct vvp_page *vpg)
266 return vpg->vpg_cl.cpl_index;
270 struct cl_device vdv_cl;
271 struct cl_device *vdv_next;
275 struct cl_lock_slice vlk_cl;
278 static inline struct lu_device *vvp2lu_dev(struct vvp_device *vdv)
280 return &vdv->vdv_cl.cd_lu_dev;
283 static inline struct vvp_device *lu2vvp_dev(const struct lu_device *d)
285 return container_of0(d, struct vvp_device, vdv_cl.cd_lu_dev);
288 static inline struct vvp_device *cl2vvp_dev(const struct cl_device *d)
290 return container_of0(d, struct vvp_device, vdv_cl);
293 static inline struct vvp_object *cl2vvp(const struct cl_object *obj)
295 return container_of0(obj, struct vvp_object, vob_cl);
298 static inline struct vvp_object *lu2vvp(const struct lu_object *obj)
300 return container_of0(obj, struct vvp_object, vob_cl.co_lu);
303 static inline struct inode *vvp_object_inode(const struct cl_object *obj)
305 return cl2vvp(obj)->vob_inode;
308 int vvp_object_invariant(const struct cl_object *obj);
309 struct vvp_object *cl_inode2vvp(struct inode *inode);
311 static inline struct page *cl2vm_page(const struct cl_page_slice *slice)
313 return cl2vvp_page(slice)->vpg_page;
316 static inline struct vvp_lock *cl2vvp_lock(const struct cl_lock_slice *slice)
318 return container_of(slice, struct vvp_lock, vlk_cl);
321 #ifdef CONFIG_LUSTRE_DEBUG_EXPENSIVE_CHECK
322 # define CLOBINVRNT(env, clob, expr) \
324 if (unlikely(!(expr))) { \
325 LU_OBJECT_DEBUG(D_ERROR, (env), &(clob)->co_lu, \
330 #else /* !CONFIG_LUSTRE_DEBUG_EXPENSIVE_CHECK */
331 # define CLOBINVRNT(env, clob, expr) \
332 ((void)sizeof(env), (void)sizeof(clob), (void)sizeof !!(expr))
333 #endif /* CONFIG_LUSTRE_DEBUG_EXPENSIVE_CHECK */
335 int lov_read_and_clear_async_rc(struct cl_object *clob);
337 int vvp_io_init(const struct lu_env *env, struct cl_object *obj,
339 int vvp_io_write_commit(const struct lu_env *env, struct cl_io *io);
340 int vvp_lock_init(const struct lu_env *env, struct cl_object *obj,
341 struct cl_lock *lock, const struct cl_io *io);
342 int vvp_page_init(const struct lu_env *env, struct cl_object *obj,
343 struct cl_page *page, pgoff_t index);
344 struct lu_object *vvp_object_alloc(const struct lu_env *env,
345 const struct lu_object_header *hdr,
346 struct lu_device *dev);
348 int vvp_global_init(void);
349 void vvp_global_fini(void);
351 extern const struct file_operations vvp_dump_pgcache_file_ops;
353 #endif /* VVP_INTERNAL_H */