fs/nfs/file.c

3  *  linux/fs/nfs/file.c
13  *  Expire cache on write to a file by Wai S Kok (Oct 1994).
17  *  nfs regular file handling functions
58  * Open file
61 nfs_file_open(struct inode *inode, struct file *filp)
65 	dprintk("NFS: open file(%pD2)\n", filp);
79 nfs_file_release(struct inode *inode, struct file *filp)
91  * nfs_revalidate_file_size - Revalidate the file size
93  * @filp: pointer to struct file
95  * Revalidates the file length. This is basically a wrapper around
98  * idea of what the file length is), or O_DIRECT (in which case we
101 static int nfs_revalidate_file_size(struct inode *inode, struct file *filp)
114 loff_t nfs_file_llseek(struct file *filp, loff_t offset, int whence)
116 	dprintk("NFS: llseek file(%pD2, %lld, %d)\n",
121 	 * the cached file length
139 nfs_file_flush(struct file *file, fl_owner_t id)
141 	struct inode	*inode = file_inode(file);
144 	dprintk("NFS: flush(%pD2)\n", file);
147 	if ((file->f_mode & FMODE_WRITE) == 0)
151 	since = filemap_sample_wb_err(file->f_mapping);
153 	return filemap_check_wb_err(file->f_mapping, since);
182 nfs_file_splice_read(struct file *in, loff_t *ppos, struct pipe_inode_info *pipe,
203 nfs_file_mmap(struct file *file, struct vm_area_struct *vma)
205 	struct inode *inode = file_inode(file);
208 	dprintk("NFS: mmap(%pD2)\n", file);
213 	status = generic_file_mmap(file, vma);
216 		status = nfs_revalidate_mapping(inode, file->f_mapping);
228 nfs_file_fsync_commit(struct file *file, int datasync)
230 	struct inode *inode = file_inode(file);
233 	dprintk("NFS: fsync file(%pD2) datasync %d\n", file, datasync);
237 	ret2 = file_check_and_advance_wb_err(file);
244 nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
246 	struct inode *inode = file_inode(file);
255 		ret = file_write_and_wait_range(file, start, end);
258 		ret = nfs_file_fsync_commit(file, datasync);
293  * It may be more efficient to read the page first if the file is
297  * that there were valid bytes of data in that range of the file,
299  * that range of the file.
311 static bool nfs_want_read_modify_write(struct file *file, struct folio *folio,
322 	if (pnfs_ld_read_whole_page(file_inode(file)))
325 	if (file->f_mode & FMODE_READ)
338 static int nfs_write_begin(struct file *file, struct address_space *mapping,
347 		file, mapping->host->i_ino, len, (long long) pos);
356 	ret = nfs_flush_incompatible(file, folio);
361 		   nfs_want_read_modify_write(file, folio, pos, len)) {
363 		ret = nfs_read_folio(file, folio);
371 static int nfs_write_end(struct file *file, struct address_space *mapping,
375 	struct nfs_open_context *ctx = nfs_file_open_context(file);
381 		file, mapping->host->i_ino, len, (long long) pos);
385 	 * as up to date if it turns out that we're extending the file.
403 	status = nfs_update_folio(file, folio, offset, copied);
509 static int nfs_swap_activate(struct swap_info_struct *sis, struct file *file,
515 	struct inode *inode = file_inode(file);
546 static void nfs_swap_deactivate(struct file *file)
548 	struct inode *inode = file_inode(file);
554 		cl->rpc_ops->disable_swap(file_inode(file));
582 	struct file *filp = vmf->vma->vm_file;
638 	struct file *file = iocb->ki_filp;
639 	struct inode *inode = file_inode(file);
645 	result = nfs_key_timeout_notify(file, inode);
653 		file, iov_iter_count(from), (long long) iocb->ki_pos);
658 	 * O_APPEND implies that we must revalidate the file length.
661 		result = nfs_revalidate_file_size(inode, file);
666 	nfs_clear_invalid_mapping(file->f_mapping);
668 	since = filemap_sample_wb_err(file->f_mapping);
681 		result = filemap_fdatawrite_range(file->f_mapping,
688 		filemap_fdatawait_range(file->f_mapping,
698 	error = filemap_check_wb_err(file->f_mapping, since);
706 		error = file_check_and_advance_wb_err(file);
713 	printk(KERN_INFO "NFS: attempt to write to active swap file!\n");
719 do_getlk(struct file *filp, int cmd, struct file_lock *fl, int is_local)
748 do_unlk(struct file *filp, int cmd, struct file_lock *fl, int is_local)
784 do_setlk(struct file *filp, int cmd, struct file_lock *fl, int is_local)
810 	 * the file is mapped, clear the page cache as well so
826  * Lock a (portion of) a file
828 int nfs_lock(struct file *filp, int cmd, struct file_lock *fl)
864  * Lock a (portion of) a file
866 int nfs_flock(struct file *filp, int cmd, struct file_lock *fl)