diff options
Diffstat (limited to 'fs/pipe.c')
| -rw-r--r-- | fs/pipe.c | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/fs/pipe.c b/fs/pipe.c index 37eb1ebeaa9..04629f36e39 100644 --- a/fs/pipe.c +++ b/fs/pipe.c @@ -954,6 +954,8 @@ static struct inode * get_pipe_inode(void) if (!inode) goto fail_inode; + inode->i_ino = get_next_ino(); + pipe = alloc_pipe_info(inode); if (!pipe) goto fail_iput; @@ -1197,12 +1199,24 @@ int pipe_proc_fn(struct ctl_table *table, int write, void __user *buf, return ret; } +/* + * After the inode slimming patch, i_pipe/i_bdev/i_cdev share the same + * location, so checking ->i_pipe is not enough to verify that this is a + * pipe. + */ +struct pipe_inode_info *get_pipe_info(struct file *file) +{ + struct inode *i = file->f_path.dentry->d_inode; + + return S_ISFIFO(i->i_mode) ? i->i_pipe : NULL; +} + long pipe_fcntl(struct file *file, unsigned int cmd, unsigned long arg) { struct pipe_inode_info *pipe; long ret; - pipe = file->f_path.dentry->d_inode->i_pipe; + pipe = get_pipe_info(file); if (!pipe) return -EBADF; @@ -1245,16 +1259,15 @@ out: * any operations on the root directory. However, we need a non-trivial * d_name - pipe: will go nicely and kill the special-casing in procfs. */ -static int pipefs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, - struct vfsmount *mnt) +static struct dentry *pipefs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_pseudo(fs_type, "pipe:", NULL, PIPEFS_MAGIC, mnt); + return mount_pseudo(fs_type, "pipe:", NULL, PIPEFS_MAGIC); } static struct file_system_type pipe_fs_type = { .name = "pipefs", - .get_sb = pipefs_get_sb, + .mount = pipefs_mount, .kill_sb = kill_anon_super, }; |