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fuse: support ioctl on directories

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Multiplexing filesystems may want to support ioctls on the underlying
files and directores (e.g. FS_IOC_{GET,SET}FLAGS).

Ioctl support on directories was missing so add it now.

Reported-by: Antonio SJ Musumeci <bile@landofbile.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
This commit is contained in:
Miklos Szeredi 2011-12-13 11:58:49 +01:00
parent c411cc88d8
commit b18da0c56e
4 changed files with 38 additions and 5 deletions
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26
fs/fuse/dir.c
View file

@ -1182,6 +1182,30 @@ static int fuse_dir_fsync(struct file *file, loff_t start, loff_t end,
return fuse_fsync_common(file, start, end, datasync, 1);
}
static long fuse_dir_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
struct fuse_conn *fc = get_fuse_conn(file->f_mapping->host);
/* FUSE_IOCTL_DIR only supported for API version >= 7.18 */
if (fc->minor < 18)
return -ENOTTY;
return fuse_ioctl_common(file, cmd, arg, FUSE_IOCTL_DIR);
}
static long fuse_dir_compat_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
struct fuse_conn *fc = get_fuse_conn(file->f_mapping->host);
if (fc->minor < 18)
return -ENOTTY;
return fuse_ioctl_common(file, cmd, arg,
FUSE_IOCTL_COMPAT | FUSE_IOCTL_DIR);
}
static bool update_mtime(unsigned ivalid)
{
/* Always update if mtime is explicitly set */
@ -1596,6 +1620,8 @@ static const struct file_operations fuse_dir_operations = {
.open = fuse_dir_open,
.release = fuse_dir_release,
.fsync = fuse_dir_fsync,
.unlocked_ioctl = fuse_dir_ioctl,
.compat_ioctl = fuse_dir_compat_ioctl,
};
static const struct inode_operations fuse_common_inode_operations = {

8
fs/fuse/file.c
View file

@ -1926,8 +1926,8 @@ long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg,
}
EXPORT_SYMBOL_GPL(fuse_do_ioctl);
static long fuse_file_ioctl_common(struct file *file, unsigned int cmd,
unsigned long arg, unsigned int flags)
long fuse_ioctl_common(struct file *file, unsigned int cmd,
unsigned long arg, unsigned int flags)
{
struct inode *inode = file->f_dentry->d_inode;
struct fuse_conn *fc = get_fuse_conn(inode);
@ -1944,13 +1944,13 @@ static long fuse_file_ioctl_common(struct file *file, unsigned int cmd,
static long fuse_file_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
return fuse_file_ioctl_common(file, cmd, arg, 0);
return fuse_ioctl_common(file, cmd, arg, 0);
}
static long fuse_file_compat_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
return fuse_file_ioctl_common(file, cmd, arg, FUSE_IOCTL_COMPAT);
return fuse_ioctl_common(file, cmd, arg, FUSE_IOCTL_COMPAT);
}
/*

2
fs/fuse/fuse_i.h
View file

@ -765,6 +765,8 @@ ssize_t fuse_direct_io(struct file *file, const char __user *buf,
size_t count, loff_t *ppos, int write);
long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg,
unsigned int flags);
long fuse_ioctl_common(struct file *file, unsigned int cmd,
unsigned long arg, unsigned int flags);
unsigned fuse_file_poll(struct file *file, poll_table *wait);
int fuse_dev_release(struct inode *inode, struct file *file);

7
include/linux/fuse.h
View file

@ -50,6 +50,9 @@
*
* 7.17
* - add FUSE_FLOCK_LOCKS and FUSE_RELEASE_FLOCK_UNLOCK
*
* 7.18
* - add FUSE_IOCTL_DIR flag
*/
#ifndef _LINUX_FUSE_H
@ -81,7 +84,7 @@
#define FUSE_KERNEL_VERSION 7
/** Minor version number of this interface */
#define FUSE_KERNEL_MINOR_VERSION 17
#define FUSE_KERNEL_MINOR_VERSION 18
/** The node ID of the root inode */
#define FUSE_ROOT_ID 1
@ -214,6 +217,7 @@ struct fuse_file_lock {
* FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed
* FUSE_IOCTL_RETRY: retry with new iovecs
* FUSE_IOCTL_32BIT: 32bit ioctl
* FUSE_IOCTL_DIR: is a directory
*
* FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs
*/
@ -221,6 +225,7 @@ struct fuse_file_lock {
#define FUSE_IOCTL_UNRESTRICTED (1 << 1)
#define FUSE_IOCTL_RETRY (1 << 2)
#define FUSE_IOCTL_32BIT (1 << 3)
#define FUSE_IOCTL_DIR (1 << 4)
#define FUSE_IOCTL_MAX_IOV 256