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[PATCH] fix cgroup-inflicted breakage in block_dev.c

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devcgroup_inode_permission() expects MAY_FOO, not FMODE_FOO; kindly
keep your misdesign consistent if you positively have to inflict it
on the kernel.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2008-06-23 08:30:55 -04:00
parent 481c5346d0
commit fe6e9c1f25
1 changed files with 9 additions and 1 deletions
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10
fs/block_dev.c
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@ -931,8 +931,16 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part)
struct gendisk *disk; struct gendisk *disk;
int ret; int ret;
int part; int part;
int perm = 0;
ret = devcgroup_inode_permission(bdev->bd_inode, file->f_mode); if (file->f_mode & FMODE_READ)
perm |= MAY_READ;
if (file->f_mode & FMODE_WRITE)
perm |= MAY_WRITE;
/*
* hooks: /n/, see "layering violations".
*/
ret = devcgroup_inode_permission(bdev->bd_inode, perm);
if (ret != 0) if (ret != 0)
return ret; return ret;