Lines Matching full:file
7 #include <linux/file.h>
14 #include <linux/backing-file.h>
30 static struct file *ovl_open_realfile(const struct file *file, in ovl_open_realfile() argument
34 struct inode *inode = file_inode(file); in ovl_open_realfile()
36 struct file *realfile; in ovl_open_realfile()
38 int flags = file->f_flags | OVL_OPEN_FLAGS; in ovl_open_realfile()
54 realfile = backing_file_open(&file->f_path, flags, realpath, in ovl_open_realfile()
60 file, file, ovl_whatisit(inode, realinode), file->f_flags, in ovl_open_realfile()
68 static int ovl_change_flags(struct file *file, unsigned int flags) in ovl_change_flags() argument
70 struct inode *inode = file_inode(file); in ovl_change_flags()
75 if (((flags ^ file->f_flags) & O_APPEND) && IS_APPEND(inode)) in ovl_change_flags()
78 if ((flags & O_DIRECT) && !(file->f_mode & FMODE_CAN_ODIRECT)) in ovl_change_flags()
81 if (file->f_op->check_flags) { in ovl_change_flags()
82 err = file->f_op->check_flags(flags); in ovl_change_flags()
87 spin_lock(&file->f_lock); in ovl_change_flags()
88 file->f_flags = (file->f_flags & ~OVL_SETFL_MASK) | flags; in ovl_change_flags()
89 file->f_iocb_flags = iocb_flags(file); in ovl_change_flags()
90 spin_unlock(&file->f_lock); in ovl_change_flags()
95 static int ovl_real_fdget_meta(const struct file *file, struct fd *real, in ovl_real_fdget_meta() argument
98 struct dentry *dentry = file_dentry(file); in ovl_real_fdget_meta()
103 real->file = file->private_data; in ovl_real_fdget_meta()
119 if (unlikely(file_inode(real->file) != d_inode(realpath.dentry))) { in ovl_real_fdget_meta()
121 real->file = ovl_open_realfile(file, &realpath); in ovl_real_fdget_meta()
123 return PTR_ERR_OR_ZERO(real->file); in ovl_real_fdget_meta()
127 if (unlikely((file->f_flags ^ real->file->f_flags) & ~OVL_OPEN_FLAGS)) in ovl_real_fdget_meta()
128 return ovl_change_flags(real->file, file->f_flags); in ovl_real_fdget_meta()
133 static int ovl_real_fdget(const struct file *file, struct fd *real) in ovl_real_fdget() argument
135 if (d_is_dir(file_dentry(file))) { in ovl_real_fdget()
137 real->file = ovl_dir_real_file(file, false); in ovl_real_fdget()
139 return PTR_ERR_OR_ZERO(real->file); in ovl_real_fdget()
142 return ovl_real_fdget_meta(file, real, false); in ovl_real_fdget()
145 static int ovl_open(struct inode *inode, struct file *file) in ovl_open() argument
147 struct dentry *dentry = file_dentry(file); in ovl_open()
148 struct file *realfile; in ovl_open()
157 err = ovl_maybe_copy_up(dentry, file->f_flags); in ovl_open()
162 file->f_flags &= ~(O_CREAT | O_EXCL | O_NOCTTY | O_TRUNC); in ovl_open()
168 realfile = ovl_open_realfile(file, &realpath); in ovl_open()
172 file->private_data = realfile; in ovl_open()
177 static int ovl_release(struct inode *inode, struct file *file) in ovl_release() argument
179 fput(file->private_data); in ovl_release()
184 static loff_t ovl_llseek(struct file *file, loff_t offset, int whence) in ovl_llseek() argument
186 struct inode *inode = file_inode(file); in ovl_llseek()
197 return file->f_pos; in ovl_llseek()
200 return vfs_setpos(file, 0, 0); in ovl_llseek()
203 ret = ovl_real_fdget(file, &real); in ovl_llseek()
208 * Overlay file f_pos is the master copy that is preserved in ovl_llseek()
212 * files, so we use the real file to perform seeks. in ovl_llseek()
215 real.file->f_pos = file->f_pos; in ovl_llseek()
218 ret = vfs_llseek(real.file, offset, whence); in ovl_llseek()
221 file->f_pos = real.file->f_pos; in ovl_llseek()
229 static void ovl_file_modified(struct file *file) in ovl_file_modified() argument
232 ovl_copyattr(file_inode(file)); in ovl_file_modified()
235 static void ovl_file_accessed(struct file *file) in ovl_file_accessed() argument
241 if (file->f_flags & O_NOATIME) in ovl_file_accessed()
244 inode = file_inode(file); in ovl_file_accessed()
260 touch_atime(&file->f_path); in ovl_file_accessed()
265 struct file *file = iocb->ki_filp; in ovl_read_iter() local
269 .cred = ovl_creds(file_inode(file)->i_sb), in ovl_read_iter()
270 .user_file = file, in ovl_read_iter()
277 ret = ovl_real_fdget(file, &real); in ovl_read_iter()
281 ret = backing_file_read_iter(real.file, iter, iocb, iocb->ki_flags, in ovl_read_iter()
290 struct file *file = iocb->ki_filp; in ovl_write_iter() local
291 struct inode *inode = file_inode(file); in ovl_write_iter()
297 .user_file = file, in ovl_write_iter()
308 ret = ovl_real_fdget(file, &real); in ovl_write_iter()
320 ret = backing_file_write_iter(real.file, iter, iocb, ifl, &ctx); in ovl_write_iter()
329 static ssize_t ovl_splice_read(struct file *in, loff_t *ppos, in ovl_splice_read()
345 ret = backing_file_splice_read(real.file, ppos, pipe, len, flags, &ctx); in ovl_splice_read()
354 * and file_start_write(real.file) in ovl_write_iter().
357 * the real file.
359 static ssize_t ovl_splice_write(struct pipe_inode_info *pipe, struct file *out, in ovl_splice_write()
379 ret = backing_file_splice_write(pipe, real.file, ppos, len, flags, &ctx); in ovl_splice_write()
388 static int ovl_fsync(struct file *file, loff_t start, loff_t end, int datasync) in ovl_fsync() argument
394 ret = ovl_sync_status(OVL_FS(file_inode(file)->i_sb)); in ovl_fsync()
398 ret = ovl_real_fdget_meta(file, &real, !datasync); in ovl_fsync()
402 /* Don't sync lower file for fear of receiving EROFS error */ in ovl_fsync()
403 if (file_inode(real.file) == ovl_inode_upper(file_inode(file))) { in ovl_fsync()
404 old_cred = ovl_override_creds(file_inode(file)->i_sb); in ovl_fsync()
405 ret = vfs_fsync_range(real.file, start, end, datasync); in ovl_fsync()
414 static int ovl_mmap(struct file *file, struct vm_area_struct *vma) in ovl_mmap() argument
416 struct file *realfile = file->private_data; in ovl_mmap()
418 .cred = ovl_creds(file_inode(file)->i_sb), in ovl_mmap()
419 .user_file = file, in ovl_mmap()
426 static long ovl_fallocate(struct file *file, int mode, loff_t offset, loff_t len) in ovl_fallocate() argument
428 struct inode *inode = file_inode(file); in ovl_fallocate()
436 ret = file_remove_privs(file); in ovl_fallocate()
440 ret = ovl_real_fdget(file, &real); in ovl_fallocate()
444 old_cred = ovl_override_creds(file_inode(file)->i_sb); in ovl_fallocate()
445 ret = vfs_fallocate(real.file, mode, offset, len); in ovl_fallocate()
449 ovl_file_modified(file); in ovl_fallocate()
459 static int ovl_fadvise(struct file *file, loff_t offset, loff_t len, int advice) in ovl_fadvise() argument
465 ret = ovl_real_fdget(file, &real); in ovl_fadvise()
469 old_cred = ovl_override_creds(file_inode(file)->i_sb); in ovl_fadvise()
470 ret = vfs_fadvise(real.file, offset, len, advice); in ovl_fadvise()
484 static loff_t ovl_copyfile(struct file *file_in, loff_t pos_in, in ovl_copyfile()
485 struct file *file_out, loff_t pos_out, in ovl_copyfile()
515 ret = vfs_copy_file_range(real_in.file, pos_in, in ovl_copyfile()
516 real_out.file, pos_out, len, flags); in ovl_copyfile()
520 ret = vfs_clone_file_range(real_in.file, pos_in, in ovl_copyfile()
521 real_out.file, pos_out, len, flags); in ovl_copyfile()
525 ret = vfs_dedupe_file_range_one(real_in.file, pos_in, in ovl_copyfile()
526 real_out.file, pos_out, len, in ovl_copyfile()
544 static ssize_t ovl_copy_file_range(struct file *file_in, loff_t pos_in, in ovl_copy_file_range()
545 struct file *file_out, loff_t pos_out, in ovl_copy_file_range()
552 static loff_t ovl_remap_file_range(struct file *file_in, loff_t pos_in, in ovl_remap_file_range()
553 struct file *file_out, loff_t pos_out, in ovl_remap_file_range()
579 static int ovl_flush(struct file *file, fl_owner_t id) in ovl_flush() argument
585 err = ovl_real_fdget(file, &real); in ovl_flush()
589 if (real.file->f_op->flush) { in ovl_flush()
590 old_cred = ovl_override_creds(file_inode(file)->i_sb); in ovl_flush()
591 err = real.file->f_op->flush(real.file, id); in ovl_flush()