Assorted commits that had missed the last merge window...

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Merge tag 'pull-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull misc vfs updates from Al Viro:
 "Assorted commits that had missed the last merge window..."

* tag 'pull-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  remove call_{read,write}_iter() functions
  do_dentry_open(): kill inode argument
  kernel_file_open(): get rid of inode argument
  get_file_rcu(): no need to check for NULL separately
  fd_is_open(): move to fs/file.c
  close_on_exec(): pass files_struct instead of fdtable

drivers/block/loop.c

@@ -445,9 +445,9 @@ static int lo_rw_aio(struct loop_device *lo, struct loop_cmd *cmd,
 	cmd->iocb.ki_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_NONE, 0);
 
 	if (rw == ITER_SOURCE)
-		ret = call_write_iter(file, &cmd->iocb, &iter);
+		ret = file->f_op->write_iter(&cmd->iocb, &iter);
 	else
-		ret = call_read_iter(file, &cmd->iocb, &iter);
+		ret = file->f_op->read_iter(&cmd->iocb, &iter);
 
 	lo_rw_aio_do_completion(cmd);
 

drivers/target/target_core_file.c

@@ -299,9 +299,9 @@ fd_execute_rw_aio(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
 		aio_cmd->iocb.ki_flags |= IOCB_DSYNC;
 
 	if (is_write)
-		ret = call_write_iter(file, &aio_cmd->iocb, &iter);
+		ret = file->f_op->write_iter(&aio_cmd->iocb, &iter);
 	else
-		ret = call_read_iter(file, &aio_cmd->iocb, &iter);
+		ret = file->f_op->read_iter(&aio_cmd->iocb, &iter);
 
 	if (ret != -EIOCBQUEUED)
 		cmd_rw_aio_complete(&aio_cmd->iocb, ret);

fs/aio.c

@@ -1608,7 +1608,7 @@ static int aio_read(struct kiocb *req, const struct iocb *iocb,
 		return ret;
 	ret = rw_verify_area(READ, file, &req->ki_pos, iov_iter_count(&iter));
 	if (!ret)
-		aio_rw_done(req, call_read_iter(file, req, &iter));
+		aio_rw_done(req, file->f_op->read_iter(req, &iter));
 	kfree(iovec);
 	return ret;
 }
@@ -1639,7 +1639,7 @@ static int aio_write(struct kiocb *req, const struct iocb *iocb,
 		if (S_ISREG(file_inode(file)->i_mode))
 			kiocb_start_write(req);
 		req->ki_flags |= IOCB_WRITE;
-		aio_rw_done(req, call_write_iter(file, req, &iter));
+		aio_rw_done(req, file->f_op->write_iter(req, &iter));
 	}
 	kfree(iovec);
 	return ret;

fs/cachefiles/namei.c

@@ -563,8 +563,7 @@ static bool cachefiles_open_file(struct cachefiles_object *object,
 	 */
 	path.mnt = cache->mnt;
 	path.dentry = dentry;
-	file = kernel_file_open(&path, O_RDWR | O_LARGEFILE | O_DIRECT,
+	file = kernel_file_open(&path, O_RDWR | O_LARGEFILE | O_DIRECT, cache->cache_cred);
-				d_backing_inode(dentry), cache->cache_cred);
 	if (IS_ERR(file)) {
 		trace_cachefiles_vfs_error(object, d_backing_inode(dentry),
 					   PTR_ERR(file),

fs/file.c

@@ -271,6 +271,11 @@ static inline void __clear_open_fd(unsigned int fd, struct fdtable *fdt)
 	__clear_bit(fd / BITS_PER_LONG, fdt->full_fds_bits);
 }
 
+static inline bool fd_is_open(unsigned int fd, const struct fdtable *fdt)
+{
+	return test_bit(fd, fdt->open_fds);
+}
+
 static unsigned int count_open_files(struct fdtable *fdt)
 {
 	unsigned int size = fdt->max_fds;
@@ -915,12 +920,7 @@ struct file *get_file_rcu(struct file __rcu **f)
 		struct file __rcu *file;
 
 		file = __get_file_rcu(f);
-		if (unlikely(!file))
+		if (!IS_ERR(file))
-			return NULL;
-
-		if (unlikely(IS_ERR(file)))
-			continue;
-
 			return file;
 	}
 }
@@ -1219,12 +1219,9 @@ void set_close_on_exec(unsigned int fd, int flag)
 
 bool get_close_on_exec(unsigned int fd)
 {
-	struct files_struct *files = current->files;
-	struct fdtable *fdt;
 	bool res;
 	rcu_read_lock();
-	fdt = files_fdtable(files);
+	res = close_on_exec(fd, current->files);
-	res = close_on_exec(fd, fdt);
 	rcu_read_unlock();
 	return res;
 }

fs/open.c

@@ -902,10 +902,10 @@ cleanup_inode:
 }
 
 static int do_dentry_open(struct file *f,
-			  struct inode *inode,
 			  int (*open)(struct inode *, struct file *))
 {
 	static const struct file_operations empty_fops = {};
+	struct inode *inode = f->f_path.dentry->d_inode;
 	int error;
 
 	path_get(&f->f_path);
@@ -1047,7 +1047,7 @@ int finish_open(struct file *file, struct dentry *dentry,
 	BUG_ON(file->f_mode & FMODE_OPENED); /* once it's opened, it's opened */
 
 	file->f_path.dentry = dentry;
-	return do_dentry_open(file, d_backing_inode(dentry), open);
+	return do_dentry_open(file, open);
 }
 EXPORT_SYMBOL(finish_open);
 
@@ -1086,7 +1086,7 @@ EXPORT_SYMBOL(file_path);
 int vfs_open(const struct path *path, struct file *file)
 {
 	file->f_path = *path;
-	return do_dentry_open(file, d_backing_inode(path->dentry), NULL);
+	return do_dentry_open(file, NULL);
 }
 
 struct file *dentry_open(const struct path *path, int flags,
@@ -1155,7 +1155,6 @@ EXPORT_SYMBOL(dentry_create);
  * kernel_file_open - open a file for kernel internal use
  * @path:	path of the file to open
  * @flags:	open flags
- * @inode:	the inode
  * @cred:	credentials for open
  *
  * Open a file for use by in-kernel consumers. The file is not accounted
@@ -1165,7 +1164,7 @@ EXPORT_SYMBOL(dentry_create);
  * Return: Opened file on success, an error pointer on failure.
  */
 struct file *kernel_file_open(const struct path *path, int flags,
-				struct inode *inode, const struct cred *cred)
+				const struct cred *cred)
 {
 	struct file *f;
 	int error;
@@ -1175,7 +1174,7 @@ struct file *kernel_file_open(const struct path *path, int flags,
 		return f;
 
 	f->f_path = *path;
-	error = do_dentry_open(f, inode, NULL);
+	error = do_dentry_open(f, NULL);
 	if (error) {
 		fput(f);
 		f = ERR_PTR(error);

fs/overlayfs/util.c

@@ -1376,7 +1376,7 @@ int ovl_ensure_verity_loaded(struct path *datapath)
 		 * If this inode was not yet opened, the verity info hasn't been
 		 * loaded yet, so we need to do that here to force it into memory.
 		 */
-		filp = kernel_file_open(datapath, O_RDONLY, inode, current_cred());
+		filp = kernel_file_open(datapath, O_RDONLY, current_cred());
 		if (IS_ERR(filp))
 			return PTR_ERR(filp);
 		fput(filp);

fs/proc/fd.c

@@ -39,10 +39,8 @@ static int seq_show(struct seq_file *m, void *v)
 		spin_lock(&files->file_lock);
 		file = files_lookup_fd_locked(files, fd);
 		if (file) {
-			struct fdtable *fdt = files_fdtable(files);
-
 			f_flags = file->f_flags;
-			if (close_on_exec(fd, fdt))
+			if (close_on_exec(fd, files))
 				f_flags |= O_CLOEXEC;
 
 			get_file(file);

fs/read_write.c

@@ -392,7 +392,7 @@ static ssize_t new_sync_read(struct file *filp, char __user *buf, size_t len, lo
 	kiocb.ki_pos = (ppos ? *ppos : 0);
 	iov_iter_ubuf(&iter, ITER_DEST, buf, len);
 
-	ret = call_read_iter(filp, &kiocb, &iter);
+	ret = filp->f_op->read_iter(&kiocb, &iter);
 	BUG_ON(ret == -EIOCBQUEUED);
 	if (ppos)
 		*ppos = kiocb.ki_pos;
@@ -494,7 +494,7 @@ static ssize_t new_sync_write(struct file *filp, const char __user *buf, size_t
 	kiocb.ki_pos = (ppos ? *ppos : 0);
 	iov_iter_ubuf(&iter, ITER_SOURCE, (void __user *)buf, len);
 
-	ret = call_write_iter(filp, &kiocb, &iter);
+	ret = filp->f_op->write_iter(&kiocb, &iter);
 	BUG_ON(ret == -EIOCBQUEUED);
 	if (ret > 0 && ppos)
 		*ppos = kiocb.ki_pos;
@@ -736,9 +736,9 @@ static ssize_t do_iter_readv_writev(struct file *filp, struct iov_iter *iter,
 	kiocb.ki_pos = (ppos ? *ppos : 0);
 
 	if (type == READ)
-		ret = call_read_iter(filp, &kiocb, iter);
+		ret = filp->f_op->read_iter(&kiocb, iter);
 	else
-		ret = call_write_iter(filp, &kiocb, iter);
+		ret = filp->f_op->write_iter(&kiocb, iter);
 	BUG_ON(ret == -EIOCBQUEUED);
 	if (ppos)
 		*ppos = kiocb.ki_pos;
@@ -799,7 +799,7 @@ ssize_t vfs_iocb_iter_read(struct file *file, struct kiocb *iocb,
 	if (ret < 0)
 		return ret;
 
-	ret = call_read_iter(file, iocb, iter);
+	ret = file->f_op->read_iter(iocb, iter);
 out:
 	if (ret >= 0)
 		fsnotify_access(file);
@@ -860,7 +860,7 @@ ssize_t vfs_iocb_iter_write(struct file *file, struct kiocb *iocb,
 		return ret;
 
 	kiocb_start_write(iocb);
-	ret = call_write_iter(file, iocb, iter);
+	ret = file->f_op->write_iter(iocb, iter);
 	if (ret != -EIOCBQUEUED)
 		kiocb_end_write(iocb);
 	if (ret > 0)

fs/splice.c

@@ -362,7 +362,7 @@ ssize_t copy_splice_read(struct file *in, loff_t *ppos,
 	iov_iter_bvec(&to, ITER_DEST, bv, npages, len);
 	init_sync_kiocb(&kiocb, in);
 	kiocb.ki_pos = *ppos;
-	ret = call_read_iter(in, &kiocb, &to);
+	ret = in->f_op->read_iter(&kiocb, &to);
 
 	if (ret > 0) {
 		keep = DIV_ROUND_UP(ret, PAGE_SIZE);
@@ -740,7 +740,7 @@ iter_file_splice_write(struct pipe_inode_info *pipe, struct file *out,
 		iov_iter_bvec(&from, ITER_SOURCE, array, n, sd.total_len - left);
 		init_sync_kiocb(&kiocb, out);
 		kiocb.ki_pos = sd.pos;
-		ret = call_write_iter(out, &kiocb, &from);
+		ret = out->f_op->write_iter(&kiocb, &from);
 		sd.pos = kiocb.ki_pos;
 		if (ret <= 0)
 			break;

include/linux/fdtable.h

@@ -33,16 +33,6 @@ struct fdtable {
 	struct rcu_head rcu;
 };
 
-static inline bool close_on_exec(unsigned int fd, const struct fdtable *fdt)
-{
-	return test_bit(fd, fdt->close_on_exec);
-}
-
-static inline bool fd_is_open(unsigned int fd, const struct fdtable *fdt)
-{
-	return test_bit(fd, fdt->open_fds);
-}
-
 /*
  * Open file table structure
  */
@@ -107,6 +97,11 @@ struct file *lookup_fdget_rcu(unsigned int fd);
 struct file *task_lookup_fdget_rcu(struct task_struct *task, unsigned int fd);
 struct file *task_lookup_next_fdget_rcu(struct task_struct *task, unsigned int *fd);
 
+static inline bool close_on_exec(unsigned int fd, const struct files_struct *files)
+{
+	return test_bit(fd, files_fdtable(files)->close_on_exec);
+}
+
 struct task_struct;
 
 void put_files_struct(struct files_struct *fs);

include/linux/fs.h

@@ -1899,7 +1899,7 @@ struct file *kernel_tmpfile_open(struct mnt_idmap *idmap,
 				 umode_t mode, int open_flag,
 				 const struct cred *cred);
 struct file *kernel_file_open(const struct path *path, int flags,
-			      struct inode *inode, const struct cred *cred);
+			      const struct cred *cred);
 
 int vfs_mkobj(struct dentry *, umode_t,
 		int (*f)(struct dentry *, umode_t, void *),
@@ -2102,18 +2102,6 @@ struct inode_operations {
 	struct offset_ctx *(*get_offset_ctx)(struct inode *inode);
 } ____cacheline_aligned;
 
-static inline ssize_t call_read_iter(struct file *file, struct kiocb *kio,
-				     struct iov_iter *iter)
-{
-	return file->f_op->read_iter(kio, iter);
-}
-
-static inline ssize_t call_write_iter(struct file *file, struct kiocb *kio,
-				      struct iov_iter *iter)
-{
-	return file->f_op->write_iter(kio, iter);
-}
-
 static inline int call_mmap(struct file *file, struct vm_area_struct *vma)
 {
 	return file->f_op->mmap(file, vma);

io_uring/rw.c

@@ -759,7 +759,7 @@ static inline int io_iter_do_read(struct io_rw *rw, struct iov_iter *iter)
 	struct file *file = rw->kiocb.ki_filp;
 
 	if (likely(file->f_op->read_iter))
-		return call_read_iter(file, &rw->kiocb, iter);
+		return file->f_op->read_iter(&rw->kiocb, iter);
 	else if (file->f_op->read)
 		return loop_rw_iter(READ, rw, iter);
 	else
@@ -1046,7 +1046,7 @@ int io_write(struct io_kiocb *req, unsigned int issue_flags)
 	kiocb->ki_flags |= IOCB_WRITE;
 
 	if (likely(req->file->f_op->write_iter))
-		ret2 = call_write_iter(req->file, kiocb, &io->iter);
+		ret2 = req->file->f_op->write_iter(kiocb, &io->iter);
 	else if (req->file->f_op->write)
 		ret2 = loop_rw_iter(WRITE, rw, &io->iter);
 	else