diff options
| author | Tejun Heo <tj@kernel.org> | 2010-12-08 20:57:38 +0100 |
|---|---|---|
| committer | Jens Axboe <jaxboe@fusionio.com> | 2010-12-16 17:53:38 +0100 |
| commit | 2d9217296bfa6fdc0d3707264076e5296faffdbd (patch) | |
| tree | ea929977770d95a47a4e7cbf15f13fb0e3d8dcad /include/linux/cdrom.h | |
| parent | 77ea887e433ad8389d416826936c110fa7910f80 (diff) | |
| download | lwn-2d9217296bfa6fdc0d3707264076e5296faffdbd.tar.gz lwn-2d9217296bfa6fdc0d3707264076e5296faffdbd.zip | |
cdrom: add ->check_events() support
In principle, cdrom just needs to pass through ->check_events() but
CDROM_MEDIA_CHANGED ioctl makes things a bit more complex. Just as
with ->media_changed() support, cdrom code needs to buffer the events
and serve them to ioctl and vfs as requested.
As the code has to deal with both ->check_events() and
->media_changed(), and vfs and ioctl event buffering, this patch adds
check_events caching on top of the existing cdi->mc_flags buffering.
It may be a good idea to deprecate CDROM_MEDIA_CHANGED ioctl and
remove all this mess.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'include/linux/cdrom.h')
| -rw-r--r-- | include/linux/cdrom.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h index 78e904796622..35eae4b67503 100644 --- a/include/linux/cdrom.h +++ b/include/linux/cdrom.h @@ -946,6 +946,8 @@ struct cdrom_device_info { /* device-related storage */ unsigned int options : 30; /* options flags */ unsigned mc_flags : 2; /* media change buffer flags */ + unsigned int vfs_events; /* cached events for vfs path */ + unsigned int ioctl_events; /* cached events for ioctl path */ int use_count; /* number of times device opened */ char name[20]; /* name of the device type */ /* per-device flags */ @@ -965,6 +967,8 @@ struct cdrom_device_ops { int (*open) (struct cdrom_device_info *, int); void (*release) (struct cdrom_device_info *); int (*drive_status) (struct cdrom_device_info *, int); + unsigned int (*check_events) (struct cdrom_device_info *cdi, + unsigned int clearing, int slot); int (*media_changed) (struct cdrom_device_info *, int); int (*tray_move) (struct cdrom_device_info *, int); int (*lock_door) (struct cdrom_device_info *, int); @@ -993,6 +997,8 @@ extern int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev, extern void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode); extern int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg); +extern unsigned int cdrom_check_events(struct cdrom_device_info *cdi, + unsigned int clearing); extern int cdrom_media_changed(struct cdrom_device_info *); extern int register_cdrom(struct cdrom_device_info *cdi); |