diff options
| author | Ingo Molnar <mingo@elte.hu> | 2008-07-07 08:07:35 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-07 08:07:35 +0200 |
| commit | d763d5edf945eec47bd443b699f174976f0afc13 (patch) | |
| tree | 3e5cd46b9a783999716bf92176854f4f1215d930 /fs/block_dev.c | |
| parent | 790e2a290b499b0400254e6870ec27969065d122 (diff) | |
| parent | 1b40a895df6c7d5a80e71f65674060b03d84bbef (diff) | |
Merge branch 'linus' into tracing/mmiotrace
Diffstat (limited to 'fs/block_dev.c')
| -rw-r--r-- | fs/block_dev.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c index 7d822fae776..10d8a0aa871 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -12,6 +12,7 @@ #include <linux/kmod.h> #include <linux/major.h> #include <linux/smp_lock.h> +#include <linux/device_cgroup.h> #include <linux/highmem.h> #include <linux/blkdev.h> #include <linux/module.h> @@ -928,9 +929,22 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part) { struct module *owner = NULL; struct gendisk *disk; - int ret = -ENXIO; + int ret; int part; + int perm = 0; + + 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; + ret = -ENXIO; file->f_mapping = bdev->bd_inode->i_mapping; lock_kernel(); disk = get_gendisk(bdev->bd_dev, &part); |