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authorJiri Slaby <jslaby@suse.cz>2012-10-19 00:26:29 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-10-23 03:50:13 +0400
commitf11afb61247016162aa92225a337c1575556c9d9 (patch)
treeba77670c1ac540bb284e6975d6996b21ad23a272 /fs/devpts
parent162b97cfa21f816f39ede1944f2a4220e3cf8969 (diff)
downloadlinux-f11afb61247016162aa92225a337c1575556c9d9.tar.xz
TTY: devpts, do not set driver_data
The goal is to stop setting and using tty->driver_data in devpts code. It should be used solely by the driver's code, pty in this case. Now driver_data are managed only in the pty driver. devpts_pty_new is switched to accept what we used to dig out of tty_struct, i.e. device node number and index. This also removes a note about driver_data being set outside of the driver. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Acked-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/devpts')
-rw-r--r--fs/devpts/inode.c21
1 files changed, 6 insertions, 15 deletions
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index ec3bab716c05..7a20d673bb8a 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -545,12 +545,9 @@ void devpts_kill_index(struct inode *ptmx_inode, int idx)
mutex_unlock(&allocated_ptys_lock);
}
-struct inode *devpts_pty_new(struct inode *ptmx_inode, struct tty_struct *tty)
+struct inode *devpts_pty_new(struct inode *ptmx_inode, dev_t device, int index,
+ void *priv)
{
- /* tty layer puts index from devpts_new_index() in here */
- int number = tty->index;
- struct tty_driver *driver = tty->driver;
- dev_t device = MKDEV(driver->major, driver->minor_start+number);
struct dentry *dentry;
struct super_block *sb = pts_sb_from_inode(ptmx_inode);
struct inode *inode;
@@ -559,23 +556,18 @@ struct inode *devpts_pty_new(struct inode *ptmx_inode, struct tty_struct *tty)
struct pts_mount_opts *opts = &fsi->mount_opts;
char s[12];
- /* We're supposed to be given the slave end of a pty */
- BUG_ON(driver->type != TTY_DRIVER_TYPE_PTY);
- BUG_ON(driver->subtype != PTY_TYPE_SLAVE);
-
inode = new_inode(sb);
if (!inode)
return ERR_PTR(-ENOMEM);
- inode->i_ino = number + 3;
+ inode->i_ino = index + 3;
inode->i_uid = opts->setuid ? opts->uid : current_fsuid();
inode->i_gid = opts->setgid ? opts->gid : current_fsgid();
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
init_special_inode(inode, S_IFCHR|opts->mode, device);
- inode->i_private = tty;
- tty->driver_data = inode;
+ inode->i_private = priv;
- sprintf(s, "%d", number);
+ sprintf(s, "%d", index);
mutex_lock(&root->d_inode->i_mutex);
@@ -613,9 +605,8 @@ void *devpts_get_priv(struct inode *pts_inode)
return priv;
}
-void devpts_pty_kill(struct tty_struct *tty)
+void devpts_pty_kill(struct inode *inode)
{
- struct inode *inode = tty->driver_data;
struct super_block *sb = pts_sb_from_inode(inode);
struct dentry *root = sb->s_root;
struct dentry *dentry;