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-rw-r--r--fs/autofs4/autofs_i.h11
-rw-r--r--fs/autofs4/dev-ioctl.c2
-rw-r--r--fs/autofs4/inode.c2
3 files changed, 13 insertions, 2 deletions
diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h
index d8d8e7ba6a1..908e1845541 100644
--- a/fs/autofs4/autofs_i.h
+++ b/fs/autofs4/autofs_i.h
@@ -269,6 +269,17 @@ int autofs4_fill_super(struct super_block *, void *, int);
struct autofs_info *autofs4_new_ino(struct autofs_sb_info *);
void autofs4_clean_ino(struct autofs_info *);
+static inline int autofs_prepare_pipe(struct file *pipe)
+{
+ if (!pipe->f_op || !pipe->f_op->write)
+ return -EINVAL;
+ if (!S_ISFIFO(pipe->f_dentry->d_inode->i_mode))
+ return -EINVAL;
+ /* We want a packet pipe */
+ pipe->f_flags |= O_DIRECT;
+ return 0;
+}
+
/* Queue management functions */
int autofs4_wait(struct autofs_sb_info *,struct dentry *, enum autofs_notify);
diff --git a/fs/autofs4/dev-ioctl.c b/fs/autofs4/dev-ioctl.c
index 3dfd615afb6..aa9103f8f01 100644
--- a/fs/autofs4/dev-ioctl.c
+++ b/fs/autofs4/dev-ioctl.c
@@ -376,7 +376,7 @@ static int autofs_dev_ioctl_setpipefd(struct file *fp,
err = -EBADF;
goto out;
}
- if (!pipe->f_op || !pipe->f_op->write) {
+ if (autofs_prepare_pipe(pipe) < 0) {
err = -EPIPE;
fput(pipe);
goto out;
diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c
index 14c7bc02349..6e488ebe778 100644
--- a/fs/autofs4/inode.c
+++ b/fs/autofs4/inode.c
@@ -290,7 +290,7 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent)
printk("autofs: could not open pipe file descriptor\n");
goto fail_dput;
}
- if (!pipe->f_op || !pipe->f_op->write)
+ if (autofs_prepare_pipe(pipe) < 0)
goto fail_fput;
sbi->pipe = pipe;
sbi->pipefd = pipefd;