Add an instance parameter devpts interfaces
Pass-in 'inode' or 'tty' parameter to devpts interfaces. With multiple
devpts instances, these parameters will be used in subsequent patches
to identify the instance of devpts mounted. The parameters also help
simplify devpts implementation.
Changelog[v3]:
- minor changes due to merge with ttydev updates
- rename parameters to emphasize they are ptmx or pts inodes
- pass-in tty_struct * to devpts_pty_kill() (this will help
cleanup the get_node() call in a subsequent patch)
Signed-off-by: Sukadev Bhattiprolu <sukadev@us.ibm.com>
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 36098ee..9590839 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -1213,12 +1213,13 @@
* be held until the 'fast-open' is also done. Will change once we
* have refcounting in the driver and per driver locking
*/
-struct tty_struct *tty_driver_lookup_tty(struct tty_driver *driver, int idx)
+struct tty_struct *tty_driver_lookup_tty(struct tty_driver *driver,
+ struct inode *inode, int idx)
{
struct tty_struct *tty;
if (driver->ops->lookup)
- return driver->ops->lookup(driver, idx);
+ return driver->ops->lookup(driver, inode, idx);
tty = driver->ttys[idx];
return tty;
@@ -1539,10 +1540,11 @@
int devpts;
int idx;
char buf[64];
+ struct inode *inode;
+ inode = filp->f_path.dentry->d_inode;
tty = (struct tty_struct *)filp->private_data;
- if (tty_paranoia_check(tty, filp->f_path.dentry->d_inode,
- "tty_release_dev"))
+ if (tty_paranoia_check(tty, inode, "tty_release_dev"))
return;
check_tty_count(tty, "tty_release_dev");
@@ -1751,7 +1753,7 @@
/* Make this pty number available for reallocation */
if (devpts)
- devpts_kill_index(idx);
+ devpts_kill_index(inode, idx);
}
/**
@@ -1836,7 +1838,7 @@
got_driver:
if (!tty) {
/* check whether we're reopening an existing tty */
- tty = tty_driver_lookup_tty(driver, index);
+ tty = tty_driver_lookup_tty(driver, inode, index);
if (IS_ERR(tty))
return PTR_ERR(tty);