alloc_file(): switch to passing O_... flags instead of FMODE_... mode

... so that it could set both ->f_flags and ->f_mode, without callers
having to set ->f_flags manually.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

drivers/misc/cxl/api.c

@@ -102,12 +102,11 @@ static struct file *cxl_getfile(const char *name,
 	path.mnt = mntget(cxl_vfs_mount);
 	d_instantiate(path.dentry, inode);
 
-	file = alloc_file(&path, OPEN_FMODE(flags), fops);
+	file = alloc_file(&path, flags & (O_ACCMODE | O_NONBLOCK), fops);
 	if (IS_ERR(file)) {
 		path_put(&path);
 		goto err_fs;
 	}
-	file->f_flags = flags & (O_ACCMODE | O_NONBLOCK);
 	file->private_data = priv;
 
 	return file;

drivers/scsi/cxlflash/ocxl_hw.c

@@ -129,7 +129,7 @@ static struct file *ocxlflash_getfile(struct device *dev, const char *name,
 	path.mnt = mntget(ocxlflash_vfs_mount);
 	d_instantiate(path.dentry, inode);
 
-	file = alloc_file(&path, OPEN_FMODE(flags), fops);
+	file = alloc_file(&path, flags & (O_ACCMODE | O_NONBLOCK), fops);
 	if (IS_ERR(file)) {
 		rc = PTR_ERR(file);
 		dev_err(dev, "%s: alloc_file failed rc=%d\n",
@@ -138,7 +138,6 @@ static struct file *ocxlflash_getfile(struct device *dev, const char *name,
 		goto err3;
 	}
 
-	file->f_flags = flags & (O_ACCMODE | O_NONBLOCK);
 	file->private_data = priv;
 out:
 	return file;

fs/aio.c

@@ -234,14 +234,10 @@ static struct file *aio_private_file(struct kioctx *ctx, loff_t nr_pages)
 	path.mnt = mntget(aio_mnt);
 
 	d_instantiate(path.dentry, inode);
-	file = alloc_file(&path, FMODE_READ | FMODE_WRITE, &aio_ring_fops);
-	if (IS_ERR(file)) {
+	file = alloc_file(&path, O_RDWR, &aio_ring_fops);
+	if (IS_ERR(file))
 		path_put(&path);
 	return file;
-	}
-
-	file->f_flags = O_RDWR;
-	return file;
 }
 
 static struct dentry *aio_mount(struct file_system_type *fs_type,

fs/anon_inodes.c

@@ -102,12 +102,11 @@ struct file *anon_inode_getfile(const char *name,
 
 	d_instantiate(path.dentry, anon_inode_inode);
 
-	file = alloc_file(&path, OPEN_FMODE(flags), fops);
+	file = alloc_file(&path, flags & (O_ACCMODE | O_NONBLOCK), fops);
 	if (IS_ERR(file))
 		goto err_dput;
 	file->f_mapping = anon_inode_inode->i_mapping;
 
-	file->f_flags = flags & (O_ACCMODE | O_NONBLOCK);
 	file->private_data = priv;
 
 	return file;

fs/file_table.c

@@ -153,10 +153,10 @@ struct file *get_empty_filp(void)
  * alloc_file - allocate and initialize a 'struct file'
  *
  * @path: the (dentry, vfsmount) pair for the new file
- * @mode: the mode with which the new file will be opened
+ * @flags: O_... flags with which the new file will be opened
  * @fop: the 'struct file_operations' for the new file
  */
-struct file *alloc_file(const struct path *path, fmode_t mode,
+struct file *alloc_file(const struct path *path, int flags,
 		const struct file_operations *fop)
 {
 	struct file *file;
@@ -165,19 +165,20 @@ struct file *alloc_file(const struct path *path, fmode_t mode,
 	if (IS_ERR(file))
 		return file;
 
+	file->f_mode = OPEN_FMODE(flags);
+	file->f_flags = flags;
 	file->f_path = *path;
 	file->f_inode = path->dentry->d_inode;
 	file->f_mapping = path->dentry->d_inode->i_mapping;
 	file->f_wb_err = filemap_sample_wb_err(file->f_mapping);
-	if ((mode & FMODE_READ) &&
+	if ((file->f_mode & FMODE_READ) &&
 	     likely(fop->read || fop->read_iter))
-		mode |= FMODE_CAN_READ;
-	if ((mode & FMODE_WRITE) &&
+		file->f_mode |= FMODE_CAN_READ;
+	if ((file->f_mode & FMODE_WRITE) &&
 	     likely(fop->write || fop->write_iter))
-		mode |= FMODE_CAN_WRITE;
-	file->f_mode = mode;
+		file->f_mode |= FMODE_CAN_WRITE;
 	file->f_op = fop;
-	if ((mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ)
+	if ((file->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ)
 		i_readcount_inc(path->dentry->d_inode);
 	return file;
 }

fs/hugetlbfs/inode.c

@@ -1375,8 +1375,7 @@ struct file *hugetlb_file_setup(const char *name, size_t size,
 	inode->i_size = size;
 	clear_nlink(inode);
 
-	file = alloc_file(&path, FMODE_WRITE | FMODE_READ,
-			&hugetlbfs_file_operations);
+	file = alloc_file(&path, O_RDWR, &hugetlbfs_file_operations);
 	if (IS_ERR(file))
 		goto out_dentry; /* inode is already attached */
 

fs/pipe.c

@@ -760,16 +760,17 @@ int create_pipe_files(struct file **res, int flags)
 
 	d_instantiate(path.dentry, inode);
 
-	f = alloc_file(&path, FMODE_WRITE, &pipefifo_fops);
+	f = alloc_file(&path, O_WRONLY | (flags & (O_NONBLOCK | O_DIRECT)),
+			&pipefifo_fops);
 	if (IS_ERR(f)) {
 		err = PTR_ERR(f);
 		goto err_dentry;
 	}
 
-	f->f_flags = O_WRONLY | (flags & (O_NONBLOCK | O_DIRECT));
 	f->private_data = inode->i_pipe;
 
-	res[0] = alloc_file(&path, FMODE_READ, &pipefifo_fops);
+	res[0] = alloc_file(&path, O_RDONLY | (flags & O_NONBLOCK),
+			&pipefifo_fops);
 	if (IS_ERR(res[0])) {
 		put_pipe_info(inode, inode->i_pipe);
 		fput(f);
@@ -778,7 +779,6 @@ int create_pipe_files(struct file **res, int flags)
 
 	path_get(&path);
 	res[0]->private_data = inode->i_pipe;
-	res[0]->f_flags = O_RDONLY | (flags & O_NONBLOCK);
 	res[1] = f;
 	return 0;
 

include/linux/file.h

@@ -18,7 +18,7 @@ struct file_operations;
 struct vfsmount;
 struct dentry;
 struct path;
-extern struct file *alloc_file(const struct path *, fmode_t mode,
+extern struct file *alloc_file(const struct path *, int flags,
 	const struct file_operations *fop);
 
 static inline void fput_light(struct file *file, int fput_needed)

ipc/shm.c

@@ -1362,7 +1362,7 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg,
 	struct ipc_namespace *ns;
 	struct shm_file_data *sfd;
 	struct path path;
-	fmode_t f_mode;
+	int f_flags;
 	unsigned long populate = 0;
 
 	err = -EINVAL;
@@ -1395,11 +1395,11 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg,
 	if (shmflg & SHM_RDONLY) {
 		prot = PROT_READ;
 		acc_mode = S_IRUGO;
-		f_mode = FMODE_READ;
+		f_flags = O_RDONLY;
 	} else {
 		prot = PROT_READ | PROT_WRITE;
 		acc_mode = S_IRUGO | S_IWUGO;
-		f_mode = FMODE_READ | FMODE_WRITE;
+		f_flags = O_RDWR;
 	}
 	if (shmflg & SHM_EXEC) {
 		prot |= PROT_EXEC;
@@ -1449,7 +1449,7 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg,
 		goto out_nattch;
 	}
 
-	file = alloc_file(&path, f_mode,
+	file = alloc_file(&path, f_flags,
 			  is_file_hugepages(shp->shm_file) ?
 				&shm_file_operations_huge :
 				&shm_file_operations);

mm/memfd.c

@@ -326,7 +326,7 @@ SYSCALL_DEFINE2(memfd_create,
 		goto err_fd;
 	}
 	file->f_mode |= FMODE_LSEEK | FMODE_PREAD | FMODE_PWRITE;
-	file->f_flags |= O_RDWR | O_LARGEFILE;
+	file->f_flags |= O_LARGEFILE;
 
 	if (flags & MFD_ALLOW_SEALING) {
 		file_seals = memfd_file_seals_ptr(file);

mm/shmem.c

@@ -3942,8 +3942,7 @@ static struct file *__shmem_file_setup(struct vfsmount *mnt, const char *name, l
 	if (IS_ERR(res))
 		goto put_path;
 
-	res = alloc_file(&path, FMODE_WRITE | FMODE_READ,
-		  &shmem_file_operations);
+	res = alloc_file(&path, O_RDWR, &shmem_file_operations);
 	if (IS_ERR(res))
 		goto put_path;
 

net/socket.c

@@ -411,7 +411,7 @@ struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname)
 
 	d_instantiate(path.dentry, SOCK_INODE(sock));
 
-	file = alloc_file(&path, FMODE_READ | FMODE_WRITE,
+	file = alloc_file(&path, O_RDWR | (flags & O_NONBLOCK),
 		  &socket_file_ops);
 	if (IS_ERR(file)) {
 		/* drop dentry, keep inode for a bit */
@@ -423,7 +423,6 @@ struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname)
 	}
 
 	sock->file = file;
-	file->f_flags = O_RDWR | (flags & O_NONBLOCK);
 	file->private_data = sock;
 	return file;
 }