LU-13783 osd-ldiskfs: use alloc_file_pseudo to create fake files

[fs/lustre-release.git] / lustre / osd-ldiskfs / osd_internal.h

diff --git a/lustre/osd-ldiskfs/osd_internal.h b/lustre/osd-ldiskfs/osd_internal.h
index 0c67dc4..9cc3528 100644 (file)
--- a/lustre/osd-ldiskfs/osd_internal.h
+++ b/lustre/osd-ldiskfs/osd_internal.h
@@ -519,7 +519,7 @@ struct osd_it_ea_dirent {
 struct osd_it_ea {
        struct osd_object       *oie_obj;
        /** used in ldiskfs iterator, to stored file pointer */
-       struct file             oie_file;
+       struct file             *oie_file;
        /** how many entries have been read-cached from storage */
        int                     oie_rd_dirent;
        /** current entry is being iterated by caller */
@@ -528,7 +528,6 @@ struct osd_it_ea {
        struct osd_it_ea_dirent *oie_dirent;
        /** buffer to hold entries, size == OSD_IT_EA_BUFSIZE */
        void                    *oie_buf;
-       struct dentry           oie_dentry;
 };
 
 /**
@@ -585,10 +584,37 @@ struct osd_iobuf {
        unsigned int       dr_init_at;  /* the line iobuf was initialized */
 };
 
-int osd_security_file_alloc(struct file *file);
-
 #define osd_dirty_inode(inode, flag)  (inode)->i_sb->s_op->dirty_inode((inode), flag)
 
+#ifndef HAVE_ALLOC_FILE_PSEUDO
+
+#define OPEN_FMODE(flag) ((__force fmode_t)(((flag + 1) & O_ACCMODE) | \
+                                           (flag & __FMODE_NONOTIFY)))
+static inline
+struct file *alloc_file_pseudo(struct inode *inode, struct vfsmount *mnt,
+                              const char *name, int flags,
+                              const struct file_operations *fops)
+{
+       struct qstr this = QSTR_INIT(name, strlen(name));
+       struct path path;
+       struct file *file;
+
+       path.dentry = d_alloc_pseudo(mnt->mnt_sb, &this);
+       if (!path.dentry)
+               return ERR_PTR(-ENOMEM);
+       path.mnt = mntget(mnt);
+       d_instantiate(path.dentry, inode);
+       file = alloc_file(&path, OPEN_FMODE(flags), fops);
+       if (IS_ERR(file)) {
+               ihold(inode);
+               path_put(&path);
+       } else {
+               file->f_flags = flags;
+       }
+       return file;
+}
+#endif /* !HAVE_ALLOC_FILE_PSEUDO */
+
 #ifdef HAVE_INODE_TIMESPEC64
 # define osd_timespec                  timespec64
 #else
@@ -616,12 +642,8 @@ struct osd_thread_info {
        /** dentry for Iterator context. */
        struct dentry           oti_it_dentry;
 
-       union {
-               /* fake struct file for osd_object_sync */
-               struct file             oti_file;
-               /* osd_statfs() */
-               struct kstatfs          oti_ksfs;
-       };
+       /* osd_statfs() */
+       struct kstatfs          oti_ksfs;
 
        struct htree_lock     *oti_hlock;
 
@@ -789,8 +811,9 @@ void osd_add_oi_cache(struct osd_thread_info *info, struct osd_device *osd,
                      struct osd_inode_id *id, const struct lu_fid *fid);
 int osd_get_idif(struct osd_thread_info *info, struct inode *inode,
                 struct dentry *dentry, struct lu_fid *fid);
-struct osd_it_ea *osd_it_dir_init(const struct lu_env *env, struct inode *inode,
-                                 __u32 attr);
+struct osd_it_ea *osd_it_dir_init(const struct lu_env *env,
+                                 struct osd_device *dev, struct inode *inode,
+                                 u32 attr);
 void osd_it_dir_fini(const struct lu_env *env, struct osd_it_ea *oie,
                     struct inode *inode);
 int osd_ldiskfs_it_fill(const struct lu_env *env, const struct dt_it *di);
@@ -1206,43 +1229,6 @@ struct dentry *osd_child_dentry_by_inode(const struct lu_env *env,
         return child_dentry;
 }
 
-/* build quasi file structure when it is needed to call an inode i_fop */
-static inline struct file *osd_quasi_file_init(const struct lu_env *env,
-                                              struct dentry *dentry,
-                                              struct inode *inode)
-{
-       struct osd_thread_info *info = osd_oti_get(env);
-
-       info->oti_file.f_path.dentry = dentry;
-       info->oti_file.f_mapping = inode->i_mapping;
-       info->oti_file.f_op = inode->i_fop;
-       info->oti_file.f_inode = inode;
-       info->oti_file.f_pos = 0;
-       info->oti_file.private_data = NULL;
-       info->oti_file.f_cred = current_cred();
-       info->oti_file.f_flags = O_NOATIME;
-       info->oti_file.f_mode = FMODE_64BITHASH | FMODE_NONOTIFY;
-
-       return &info->oti_file;
-}
-
-static inline struct file *osd_quasi_file(const struct lu_env *env,
-                                         struct inode *inode)
-{
-       struct osd_thread_info *info = osd_oti_get(env);
-
-       info->oti_obj_dentry.d_inode = inode;
-       info->oti_obj_dentry.d_sb = inode->i_sb;
-
-       return osd_quasi_file_init(env, &info->oti_obj_dentry, inode);
-}
-
-static inline struct file *osd_quasi_file_by_dentry(const struct lu_env *env,
-                                                   struct dentry *dentry)
-{
-       return osd_quasi_file_init(env, dentry, dentry->d_inode);
-}
-
 extern int osd_trans_declare_op2rb[];
 extern int ldiskfs_track_declares_assert;
 void osd_trans_dump_creds(const struct lu_env *env, struct thandle *th);
@@ -1575,7 +1561,7 @@ osd_index_backup(const struct lu_env *env, struct osd_device *osd, bool backup)
 int osd_trunc_lock(struct osd_object *obj, struct osd_thandle *oh,
                   bool shared);
 void osd_trunc_unlock_all(const struct lu_env *env, struct list_head *list);
-void osd_process_truncates(const struct lu_env *env, struct list_head *list);
+int osd_process_truncates(const struct lu_env *env, struct list_head *list);
 void osd_execute_truncate(struct osd_object *obj);
 
 #ifdef HAVE_BIO_ENDIO_USES_ONE_ARG