* Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2013, Intel Corporation.
+ * Copyright (c) 2013, 2015, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#ifndef VVP_INTERNAL_H
#define VVP_INTERNAL_H
-
+#include <lustre/lustre_idl.h>
#include <cl_object.h>
-#include "llite_internal.h"
+
+enum obd_notify_event;
+struct inode;
+struct lustre_md;
+struct obd_device;
+struct obd_export;
+struct page;
+
+enum vvp_io_subtype {
+ /** normal IO */
+ IO_NORMAL,
+ /** io started from splice_{read|write} */
+ IO_SPLICE,
+};
+
+/**
+ * IO state private to VVP layer.
+ */
+struct vvp_io {
+ /** super class */
+ struct cl_io_slice vui_cl;
+ struct cl_io_lock_link vui_link;
+ /**
+ * I/O vector information to or from which read/write is going.
+ */
+ struct iov_iter *vui_iter;
+ /**
+ * Total size for the left IO.
+ */
+ size_t vui_tot_count;
+
+ union {
+ struct vvp_fault_io {
+ /**
+ * Inode modification time that is checked across DLM
+ * lock request.
+ */
+ time_t ft_mtime;
+ struct vm_area_struct *ft_vma;
+ /**
+ * locked page returned from vvp_io
+ */
+ struct page *ft_vmpage;
+ /**
+ * kernel fault info
+ */
+ struct vm_fault *ft_vmf;
+ /**
+ * fault API used bitflags for return code.
+ */
+ unsigned int ft_flags;
+ /**
+ * check that flags are from filemap_fault
+ */
+ bool ft_flags_valid;
+ } fault;
+ struct {
+ struct pipe_inode_info *vui_pipe;
+ unsigned int vui_flags;
+ } splice;
+ struct {
+ struct cl_page_list vui_queue;
+ unsigned long vui_written;
+ int vui_from;
+ int vui_to;
+ } write;
+ } u;
+
+ enum vvp_io_subtype vui_io_subtype;
+
+ /**
+ * Layout version when this IO is initialized
+ */
+ __u32 vui_layout_gen;
+ /**
+ * File descriptor against which IO is done.
+ */
+ struct ll_file_data *vui_fd;
+ struct kiocb *vui_iocb;
+
+ /* Readahead state. */
+ pgoff_t vui_ra_start;
+ pgoff_t vui_ra_count;
+ /* Set when vui_ra_{start,count} have been initialized. */
+ bool vui_ra_valid;
+};
+
+extern struct lu_device_type vvp_device_type;
+
+extern struct lu_context_key vvp_session_key;
+extern struct lu_context_key vvp_thread_key;
+
+extern struct kmem_cache *vvp_lock_kmem;
+extern struct kmem_cache *vvp_object_kmem;
+
+struct vvp_thread_info {
+ struct cl_lock vti_lock;
+ struct cl_lock_descr vti_descr;
+ struct cl_io vti_io;
+ struct cl_attr vti_attr;
+};
+
+static inline struct vvp_thread_info *vvp_env_info(const struct lu_env *env)
+{
+ struct vvp_thread_info *vti;
+
+ vti = lu_context_key_get(&env->le_ctx, &vvp_thread_key);
+ LASSERT(vti != NULL);
+
+ return vti;
+}
+
+static inline struct cl_lock *vvp_env_lock(const struct lu_env *env)
+{
+ struct cl_lock *lock = &vvp_env_info(env)->vti_lock;
+
+ memset(lock, 0, sizeof(*lock));
+
+ return lock;
+}
+
+static inline struct cl_attr *vvp_env_thread_attr(const struct lu_env *env)
+{
+ struct cl_attr *attr = &vvp_env_info(env)->vti_attr;
+
+ memset(attr, 0, sizeof(*attr));
+
+ return attr;
+}
+
+static inline struct cl_io *vvp_env_thread_io(const struct lu_env *env)
+{
+ struct cl_io *io = &vvp_env_info(env)->vti_io;
+
+ memset(io, 0, sizeof(*io));
+
+ return io;
+}
+
+struct vvp_session {
+ struct vvp_io vs_ios;
+};
+
+static inline struct vvp_session *vvp_env_session(const struct lu_env *env)
+{
+ struct vvp_session *ses;
+
+ ses = lu_context_key_get(env->le_ses, &vvp_session_key);
+ LASSERT(ses != NULL);
+
+ return ses;
+}
+
+static inline struct vvp_io *vvp_env_io(const struct lu_env *env)
+{
+ return &vvp_env_session(env)->vs_ios;
+}
+
+/**
+ * VPP-private object state.
+ */
+struct vvp_object {
+ struct cl_object_header vob_header;
+ struct cl_object vob_cl;
+ struct inode *vob_inode;
+
+ /**
+ * Number of transient pages. This is no longer protected by i_sem,
+ * and needs to be atomic. This is not actually used for anything,
+ * and can probably be removed.
+ */
+ atomic_t vob_transient_pages;
+ /**
+ * Number of outstanding mmaps on this file.
+ *
+ * \see ll_vm_open(), ll_vm_close().
+ */
+ atomic_t vob_mmap_cnt;
+
+ /**
+ * various flags
+ * vob_discard_page_warned
+ * if pages belonging to this object are discarded when a client
+ * is evicted, some debug info will be printed, this flag will be set
+ * during processing the first discarded page, then avoid flooding
+ * debug message for lots of discarded pages.
+ *
+ * \see ll_dirty_page_discard_warn.
+ */
+ unsigned int vob_discard_page_warned:1;
+};
+
+/**
+ * VVP-private page state.
+ */
+struct vvp_page {
+ struct cl_page_slice vpg_cl;
+ unsigned vpg_defer_uptodate:1,
+ vpg_ra_updated:1,
+ vpg_ra_used:1;
+ /** VM page */
+ struct page *vpg_page;
+};
+
+static inline struct vvp_page *cl2vvp_page(const struct cl_page_slice *slice)
+{
+ return container_of(slice, struct vvp_page, vpg_cl);
+}
+
+static inline pgoff_t vvp_index(struct vvp_page *vpg)
+{
+ return vpg->vpg_cl.cpl_index;
+}
+
+struct vvp_device {
+ struct cl_device vdv_cl;
+ struct cl_device *vdv_next;
+};
+
+struct vvp_lock {
+ struct cl_lock_slice vlk_cl;
+};
+
+static inline struct lu_device *vvp2lu_dev(struct vvp_device *vdv)
+{
+ return &vdv->vdv_cl.cd_lu_dev;
+}
+
+static inline struct vvp_device *lu2vvp_dev(const struct lu_device *d)
+{
+ return container_of0(d, struct vvp_device, vdv_cl.cd_lu_dev);
+}
+
+static inline struct vvp_device *cl2vvp_dev(const struct cl_device *d)
+{
+ return container_of0(d, struct vvp_device, vdv_cl);
+}
+
+static inline struct vvp_object *cl2vvp(const struct cl_object *obj)
+{
+ return container_of0(obj, struct vvp_object, vob_cl);
+}
+
+static inline struct vvp_object *lu2vvp(const struct lu_object *obj)
+{
+ return container_of0(obj, struct vvp_object, vob_cl.co_lu);
+}
+
+static inline struct inode *vvp_object_inode(const struct cl_object *obj)
+{
+ return cl2vvp(obj)->vob_inode;
+}
+
+int vvp_object_invariant(const struct cl_object *obj);
+struct vvp_object *cl_inode2vvp(struct inode *inode);
+
+static inline struct page *cl2vm_page(const struct cl_page_slice *slice)
+{
+ return cl2vvp_page(slice)->vpg_page;
+}
+
+static inline struct vvp_lock *cl2vvp_lock(const struct cl_lock_slice *slice)
+{
+ return container_of(slice, struct vvp_lock, vlk_cl);
+}
+
+#ifdef CONFIG_LUSTRE_DEBUG_EXPENSIVE_CHECK
+# define CLOBINVRNT(env, clob, expr) \
+ do { \
+ if (unlikely(!(expr))) { \
+ LU_OBJECT_DEBUG(D_ERROR, (env), &(clob)->co_lu, \
+ #expr); \
+ LINVRNT(0); \
+ } \
+ } while (0)
+#else /* !CONFIG_LUSTRE_DEBUG_EXPENSIVE_CHECK */
+# define CLOBINVRNT(env, clob, expr) \
+ ((void)sizeof(env), (void)sizeof(clob), (void)sizeof !!(expr))
+#endif /* CONFIG_LUSTRE_DEBUG_EXPENSIVE_CHECK */
+
+int lov_read_and_clear_async_rc(struct cl_object *clob);
int vvp_io_init(const struct lu_env *env, struct cl_object *obj,
struct cl_io *io);
+int vvp_io_write_commit(const struct lu_env *env, struct cl_io *io);
int vvp_lock_init(const struct lu_env *env, struct cl_object *obj,
struct cl_lock *lock, const struct cl_io *io);
int vvp_page_init(const struct lu_env *env, struct cl_object *obj,
struct lu_object *vvp_object_alloc(const struct lu_env *env,
const struct lu_object_header *hdr,
struct lu_device *dev);
-struct ccc_object *cl_inode2ccc(struct inode *inode);
+
+int vvp_global_init(void);
+void vvp_global_fini(void);
extern const struct file_operations vvp_dump_pgcache_file_ops;
git://git.whamcloud.com / fs / lustre-release.git / blobdiff