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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-05-23 05:13:53 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-05-23 05:13:53 +0400
commitcbfef53360ea88fa7ef9f80def778fba9b05d21e (patch)
tree9e23ee08206ec0304e25e8a93eabc2d5bcd8ae9c /fs/kernfs/file.c
parentd35cc56ddfc948d8df1aa6d41ac345fcec01854d (diff)
parent4b660a7f5c8099d88d1a43d8ae138965112592c7 (diff)
downloadlinux-cbfef53360ea88fa7ef9f80def778fba9b05d21e.tar.xz
Merge 3.15-rc6 into driver-core-next
We want the kernfs fixes in this branch as well for testing. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/kernfs/file.c')
-rw-r--r--fs/kernfs/file.c17
1 files changed, 10 insertions, 7 deletions
diff --git a/fs/kernfs/file.c b/fs/kernfs/file.c
index 40251cd741a0..e3d37f607f97 100644
--- a/fs/kernfs/file.c
+++ b/fs/kernfs/file.c
@@ -611,6 +611,7 @@ static void kernfs_put_open_node(struct kernfs_node *kn,
static int kernfs_fop_open(struct inode *inode, struct file *file)
{
struct kernfs_node *kn = file->f_path.dentry->d_fsdata;
+ struct kernfs_root *root = kernfs_root(kn);
const struct kernfs_ops *ops;
struct kernfs_open_file *of;
bool has_read, has_write, has_mmap;
@@ -625,14 +626,16 @@ static int kernfs_fop_open(struct inode *inode, struct file *file)
has_write = ops->write || ops->mmap;
has_mmap = ops->mmap;
- /* check perms and supported operations */
- if ((file->f_mode & FMODE_WRITE) &&
- (!(inode->i_mode & S_IWUGO) || !has_write))
- goto err_out;
+ /* see the flag definition for details */
+ if (root->flags & KERNFS_ROOT_EXTRA_OPEN_PERM_CHECK) {
+ if ((file->f_mode & FMODE_WRITE) &&
+ (!(inode->i_mode & S_IWUGO) || !has_write))
+ goto err_out;
- if ((file->f_mode & FMODE_READ) &&
- (!(inode->i_mode & S_IRUGO) || !has_read))
- goto err_out;
+ if ((file->f_mode & FMODE_READ) &&
+ (!(inode->i_mode & S_IRUGO) || !has_read))
+ goto err_out;
+ }
/* allocate a kernfs_open_file for the file */
error = -ENOMEM;