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authorAl Viro <viro@zeniv.linux.org.uk>2008-06-23 08:30:55 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2008-06-23 08:30:55 -0400
commitfe6e9c1f25ac01f848bd084ee0ee62a5a0966ff3 (patch)
tree19792926f6a7e6e50f5cf1bcfa10510943f8e3cc
parent481c5346d0981940ee63037eb53e4e37b0735c10 (diff)
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[PATCH] fix cgroup-inflicted breakage in block_dev.c
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>
-rw-r--r--fs/block_dev.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 470c10ceb0fb..10d8a0aa871a 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -931,8 +931,16 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part)
struct gendisk *disk;
int ret;
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)
return ret;