8 #include <linux/file.h>
23 static inline void update_upper_file(struct file *upper_file, struct file *lower_file)  in update_upper_file()
34 int hmdfs_file_open_local(struct inode *inode, struct file *file)  in hmdfs_file_open_local()  argument
37 	struct file *lower_file = NULL;  in hmdfs_file_open_local()
49 	hmdfs_get_lower_path(file->f_path.dentry, &lower_path);  in hmdfs_file_open_local()
52 		lower_file = dentry_open(&lower_path, file->f_flags | O_DIRECT,  in hmdfs_file_open_local()
55 		lower_file = dentry_open(&lower_path, file->f_flags, cred);  in hmdfs_file_open_local()
62 		file->private_data = gfi;  in hmdfs_file_open_local()
63 		update_upper_file(file, lower_file);  in hmdfs_file_open_local()
64 		if (file->f_flags & (O_RDWR | O_WRONLY))  in hmdfs_file_open_local()
71 int hmdfs_file_release_local(struct inode *inode, struct file *file)  in hmdfs_file_release_local()  argument
73 	struct hmdfs_file_info *gfi = hmdfs_f(file);  in hmdfs_file_release_local()
76 	if (file->f_flags & (O_RDWR | O_WRONLY))  in hmdfs_file_release_local()
78 	file->private_data = NULL;  in hmdfs_file_release_local()
84 static void hmdfs_file_accessed(struct file *file)  in hmdfs_file_accessed()  argument
86 	struct file *lower_file = hmdfs_f(file)->lower_file;  in hmdfs_file_accessed()
87 	struct inode *inode = file_inode(file);  in hmdfs_file_accessed()
90 	if (file->f_flags & O_NOATIME)  in hmdfs_file_accessed()
96 ssize_t hmdfs_do_read_iter(struct file *file, struct iov_iter *iter,  in hmdfs_do_read_iter()  argument
100 	struct file *lower_file = hmdfs_f(file)->lower_file;  in hmdfs_do_read_iter()
106 	if (file->f_inode->i_mapping != NULL &&  in hmdfs_do_read_iter()
107 	    file->f_inode->i_mapping->a_ops == &hmdfs_aops_cloud) {  in hmdfs_do_read_iter()
113 	hmdfs_file_accessed(file);  in hmdfs_do_read_iter()
123 static void hmdfs_file_modified(struct file *file)  in hmdfs_file_modified()  argument
125 	struct inode *inode = file_inode(file);  in hmdfs_file_modified()
126 	struct dentry *dentry = file_dentry(file);  in hmdfs_file_modified()
127 	struct file *lower_file = hmdfs_f(file)->lower_file;  in hmdfs_file_modified()
139 ssize_t hmdfs_do_write_iter(struct file *file, struct iov_iter *iter,  in hmdfs_do_write_iter()  argument
143 	struct file *lower_file = hmdfs_f(file)->lower_file;  in hmdfs_do_write_iter()
144 	struct inode *inode = file_inode(file);  in hmdfs_do_write_iter()
151 	ret = file_remove_privs(file);  in hmdfs_do_write_iter()
159 	hmdfs_file_modified(file);  in hmdfs_do_write_iter()
171 int hmdfs_fsync_local(struct file *file, loff_t start, loff_t end, int datasync)  in hmdfs_fsync_local()  argument
174 	struct file *lower_file = hmdfs_f(file)->lower_file;  in hmdfs_fsync_local()
176 	err = __generic_file_fsync(file, start, end, datasync);  in hmdfs_fsync_local()
185 loff_t hmdfs_file_llseek_local(struct file *file, loff_t offset, int whence)  in hmdfs_file_llseek_local()  argument
188 	struct file *lower_file;  in hmdfs_file_llseek_local()
190 	lower_file = hmdfs_f(file)->lower_file;  in hmdfs_file_llseek_local()
191 	lower_file->f_pos = file->f_pos;  in hmdfs_file_llseek_local()
193 	file->f_pos = lower_file->f_pos;  in hmdfs_file_llseek_local()
198 int hmdfs_file_mmap_local(struct file *file, struct vm_area_struct *vma)  in hmdfs_file_mmap_local()  argument
200 	struct hmdfs_file_info *private_data = file->private_data;  in hmdfs_file_mmap_local()
201 	struct file *realfile = NULL;  in hmdfs_file_mmap_local()
214 	if (WARN_ON(file != vma->vm_file))  in hmdfs_file_mmap_local()
222 		fput(file);  in hmdfs_file_mmap_local()
224 	file_accessed(file);  in hmdfs_file_mmap_local()
242 static int hmdfs_iterate_local(struct file *file, struct dir_context *ctx)  in hmdfs_iterate_local()  argument
246 	struct file *lower_file = hmdfs_f(file)->lower_file;  in hmdfs_iterate_local()
251 	lower_file->f_pos = file->f_pos;  in hmdfs_iterate_local()
253 	file->f_pos = lower_file->f_pos;  in hmdfs_iterate_local()
258 	trace_hmdfs_iterate_local(file->f_path.dentry, start_pos, ctx->pos,  in hmdfs_iterate_local()
263 int hmdfs_dir_open_local(struct inode *inode, struct file *file)  in hmdfs_dir_open_local()  argument
266 	struct file *lower_file = NULL;  in hmdfs_dir_open_local()
267 	struct dentry *dentry = file->f_path.dentry;  in hmdfs_dir_open_local()
281 	lower_file = dentry_open(&lower_path, file->f_flags, cred);  in hmdfs_dir_open_local()
288 		file->private_data = gfi;  in hmdfs_dir_open_local()
297 static int hmdfs_dir_release_local(struct inode *inode, struct file *file)  in hmdfs_dir_release_local()  argument
299 	struct hmdfs_file_info *gfi = hmdfs_f(file);  in hmdfs_dir_release_local()
301 	file->private_data = NULL;  in hmdfs_dir_release_local()
315 static int __hmdfs_ioc_set_share_path(struct file *file,  in __hmdfs_ioc_set_share_path()  argument
318 	struct super_block *sb = file->f_inode->i_sb;  in __hmdfs_ioc_set_share_path()
329 	if (!src.file)  in __hmdfs_ioc_set_share_path()
332 	/* only reg file can be shared */  in __hmdfs_ioc_set_share_path()
333 	if (!S_ISREG(src.file->f_inode->i_mode)) {  in __hmdfs_ioc_set_share_path()
338 	/* share file is not allowed to be shared */  in __hmdfs_ioc_set_share_path()
339 	if (hmdfs_is_share_file(src.file)) {  in __hmdfs_ioc_set_share_path()
344 	dentry = src.file->f_path.dentry;  in __hmdfs_ioc_set_share_path()
350 	dir_path = hmdfs_get_dentry_relative_path(file->f_path.dentry);  in __hmdfs_ioc_set_share_path()
367 		err = insert_share_item(st, &relative_path, src.file, sc->cid);  in __hmdfs_ioc_set_share_path()
374 		update_share_item(item, src.file, sc->cid);  in __hmdfs_ioc_set_share_path()
386 static int hmdfs_ioc_set_share_path(struct file *file, unsigned long arg)  in hmdfs_ioc_set_share_path()  argument
394 	return __hmdfs_ioc_set_share_path(file, &sc);  in hmdfs_ioc_set_share_path()
397 static long hmdfs_dir_ioctl_local(struct file *file, unsigned int cmd,  in hmdfs_dir_ioctl_local()  argument
402 		return hmdfs_ioc_set_share_path(file, arg);  in hmdfs_dir_ioctl_local()