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| author | Jon Masters <jonathan@jonmasters.org> | 2005-11-08 21:34:43 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-09 07:55:53 -0800 |
| commit | 88baf3e85af72f606363a85e9a60e9e61cc64a6c (patch) | |
| tree | 6a887c40f55680b2494c98cd216f3cdafe1768e8 /drivers/block/floppy.c | |
| parent | 4448aaf0faafff3f275d15937c28b6346760e028 (diff) | |
| download | linux-88baf3e85af72f606363a85e9a60e9e61cc64a6c.tar.gz linux-88baf3e85af72f606363a85e9a60e9e61cc64a6c.tar.bz2 linux-88baf3e85af72f606363a85e9a60e9e61cc64a6c.zip | |
[PATCH] fix floppy.c to store correct ro/rw status in underlying gendisk
Evgeny Stambulchik found that doing the following always worked:
# mount /dev/fd0 /mnt/floppy/
mount: block device /dev/fd0 is write-protected, mounting read-only
# mount -o remount,rw /mnt/floppy
# echo $?
0
This is the case because the block device /dev/fd0 is writeable but the
floppy disk is marked protected. A fix is to simply have floppy_open mark
the underlying gendisk policy according to reality (since the VFS doesn't
provide a way for do_remount_sb to inquire as to the current device
status).
Signed-off-by: Jon Masters <jcm@jonmasters.org>
Cc: Al Viro <viro@ftp.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/block/floppy.c')
| -rw-r--r-- | drivers/block/floppy.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c index 5eadbb9d4d71..dd1935d55424 100644 --- a/drivers/block/floppy.c +++ b/drivers/block/floppy.c @@ -3714,6 +3714,12 @@ static int floppy_open(struct inode *inode, struct file *filp) USETF(FD_VERIFY); } + /* set underlying gendisk policy to reflect real ro/rw status */ + if (UTESTF(FD_DISK_WRITABLE)) + inode->i_bdev->bd_disk->policy = 0; + else + inode->i_bdev->bd_disk->policy = 1; + if (UDRS->fd_ref == -1 || (UDRS->fd_ref && (filp->f_flags & O_EXCL))) goto out2; |