summaryrefslogtreecommitdiffstats
path: root/drivers/tty/tty_io.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/tty/tty_io.c')
-rw-r--r--drivers/tty/tty_io.c113
1 files changed, 58 insertions, 55 deletions
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 493fc47428..96617f9af8 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -159,7 +159,7 @@ static int tty_fasync(int fd, struct file *filp, int on);
static void release_tty(struct tty_struct *tty, int idx);
/**
- * free_tty_struct - free a disused tty
+ * free_tty_struct - free a disused tty
* @tty: tty struct to free
*
* Free the write buffers, tty queue and tty memory itself.
@@ -233,7 +233,7 @@ static void tty_del_file(struct file *file)
}
/**
- * tty_name - return tty naming
+ * tty_name - return tty naming
* @tty: tty structure
*
* Convert a tty structure into a name. The name reflects the kernel naming
@@ -295,7 +295,7 @@ static void check_tty_count(struct tty_struct *tty, const char *routine)
}
/**
- * get_tty_driver - find device of a tty
+ * get_tty_driver - find device of a tty
* @device: device identifier
* @index: returns the index of the tty
*
@@ -320,7 +320,7 @@ static struct tty_driver *get_tty_driver(dev_t device, int *index)
}
/**
- * tty_dev_name_to_number - return dev_t for device name
+ * tty_dev_name_to_number - return dev_t for device name
* @name: user space name of device under /dev
* @number: pointer to dev_t that this function will populate
*
@@ -372,7 +372,7 @@ EXPORT_SYMBOL_GPL(tty_dev_name_to_number);
#ifdef CONFIG_CONSOLE_POLL
/**
- * tty_find_polling_driver - find device of a polled tty
+ * tty_find_polling_driver - find device of a polled tty
* @name: name string to match
* @line: pointer to resulting tty line nr
*
@@ -505,7 +505,7 @@ static DEFINE_SPINLOCK(redirect_lock);
static struct file *redirect;
/**
- * tty_wakeup - request more data
+ * tty_wakeup - request more data
* @tty: terminal
*
* Internal and external helper for wakeups of tty. This function informs the
@@ -529,7 +529,7 @@ void tty_wakeup(struct tty_struct *tty)
EXPORT_SYMBOL_GPL(tty_wakeup);
/**
- * tty_release_redirect - Release a redirect on a pty if present
+ * tty_release_redirect - Release a redirect on a pty if present
* @tty: tty device
*
* This is available to the pty code so if the master closes, if the slave is a
@@ -550,7 +550,7 @@ static struct file *tty_release_redirect(struct tty_struct *tty)
}
/**
- * __tty_hangup - actual handler for hangup events
+ * __tty_hangup - actual handler for hangup events
* @tty: tty device
* @exit_session: if non-zero, signal all foreground group processes
*
@@ -673,7 +673,7 @@ static void do_tty_hangup(struct work_struct *work)
}
/**
- * tty_hangup - trigger a hangup event
+ * tty_hangup - trigger a hangup event
* @tty: tty to hangup
*
* A carrier loss (virtual or otherwise) has occurred on @tty. Schedule a
@@ -687,7 +687,7 @@ void tty_hangup(struct tty_struct *tty)
EXPORT_SYMBOL(tty_hangup);
/**
- * tty_vhangup - process vhangup
+ * tty_vhangup - process vhangup
* @tty: tty to hangup
*
* The user has asked via system call for the terminal to be hung up. We do
@@ -703,7 +703,7 @@ EXPORT_SYMBOL(tty_vhangup);
/**
- * tty_vhangup_self - process vhangup for own ctty
+ * tty_vhangup_self - process vhangup for own ctty
*
* Perform a vhangup on the current controlling tty
*/
@@ -719,7 +719,7 @@ void tty_vhangup_self(void)
}
/**
- * tty_vhangup_session - hangup session leader exit
+ * tty_vhangup_session - hangup session leader exit
* @tty: tty to hangup
*
* The session leader is exiting and hanging up its controlling terminal.
@@ -735,7 +735,7 @@ void tty_vhangup_session(struct tty_struct *tty)
}
/**
- * tty_hung_up_p - was tty hung up
+ * tty_hung_up_p - was tty hung up
* @filp: file pointer of tty
*
* Return: true if the tty has been subject to a vhangup or a carrier loss
@@ -756,7 +756,7 @@ void __stop_tty(struct tty_struct *tty)
}
/**
- * stop_tty - propagate flow control
+ * stop_tty - propagate flow control
* @tty: tty to stop
*
* Perform flow control to the driver. May be called on an already stopped
@@ -790,7 +790,7 @@ void __start_tty(struct tty_struct *tty)
}
/**
- * start_tty - propagate flow control
+ * start_tty - propagate flow control
* @tty: tty to start
*
* Start a tty that has been stopped if at all possible. If @tty was previously
@@ -818,7 +818,7 @@ static void tty_update_time(struct tty_struct *tty, bool mtime)
spin_lock(&tty->files_lock);
list_for_each_entry(priv, &tty->tty_files, list) {
struct inode *inode = file_inode(priv->file);
- struct timespec64 *time = mtime ? &inode->i_mtime : &inode->i_atime;
+ struct timespec64 time = mtime ? inode_get_mtime(inode) : inode_get_atime(inode);
/*
* We only care if the two values differ in anything other than the
@@ -826,8 +826,12 @@ static void tty_update_time(struct tty_struct *tty, bool mtime)
* the time of the tty device, otherwise it could be construded as a
* security leak to let userspace know the exact timing of the tty.
*/
- if ((sec ^ time->tv_sec) & ~7)
- time->tv_sec = sec;
+ if ((sec ^ time.tv_sec) & ~7) {
+ if (mtime)
+ inode_set_mtime(inode, sec, 0);
+ else
+ inode_set_atime(inode, sec, 0);
+ }
}
spin_unlock(&tty->files_lock);
}
@@ -898,7 +902,7 @@ static ssize_t iterate_tty_read(struct tty_ldisc *ld, struct tty_struct *tty,
/**
- * tty_read - read method for tty device files
+ * tty_read - read method for tty device files
* @iocb: kernel I/O control block
* @to: destination for the data read
*
@@ -1091,7 +1095,7 @@ static ssize_t file_tty_write(struct file *file, struct kiocb *iocb, struct iov_
}
/**
- * tty_write - write method for tty device file
+ * tty_write - write method for tty device file
* @iocb: kernel I/O control block
* @from: iov_iter with data to write
*
@@ -1133,7 +1137,7 @@ ssize_t redirected_tty_write(struct kiocb *iocb, struct iov_iter *iter)
}
/**
- * tty_send_xchar - send priority character
+ * tty_send_xchar - send priority character
* @tty: the tty to send to
* @ch: xchar to send
*
@@ -1167,7 +1171,7 @@ int tty_send_xchar(struct tty_struct *tty, char ch)
}
/**
- * pty_line_name - generate name for a pty
+ * pty_line_name - generate name for a pty
* @driver: the tty driver in use
* @index: the minor number
* @p: output buffer of at least 6 bytes
@@ -1188,7 +1192,7 @@ static void pty_line_name(struct tty_driver *driver, int index, char *p)
}
/**
- * tty_line_name - generate name for a tty
+ * tty_line_name - generate name for a tty
* @driver: the tty driver in use
* @index: the minor number
* @p: output buffer of at least 7 bytes
@@ -1239,7 +1243,7 @@ static struct tty_struct *tty_driver_lookup_tty(struct tty_driver *driver,
}
/**
- * tty_init_termios - helper for termios setup
+ * tty_init_termios - helper for termios setup
* @tty: the tty to set up
*
* Initialise the termios structure for this tty. This runs under the
@@ -1322,7 +1326,7 @@ static void tty_driver_remove_tty(struct tty_driver *driver, struct tty_struct *
}
/**
- * tty_reopen() - fast re-open of an open tty
+ * tty_reopen() - fast re-open of an open tty
* @tty: the tty to open
*
* Re-opens on master ptys are not allowed and return -%EIO.
@@ -1366,7 +1370,7 @@ static int tty_reopen(struct tty_struct *tty)
}
/**
- * tty_init_dev - initialise a tty device
+ * tty_init_dev - initialise a tty device
* @driver: tty driver we are opening a device on
* @idx: device index
*
@@ -1488,7 +1492,7 @@ void tty_save_termios(struct tty_struct *tty)
EXPORT_SYMBOL_GPL(tty_save_termios);
/**
- * tty_flush_works - flush all works of a tty/pty pair
+ * tty_flush_works - flush all works of a tty/pty pair
* @tty: tty device to flush works for (or either end of a pty pair)
*
* Sync flush all works belonging to @tty (and the 'other' tty).
@@ -1504,7 +1508,7 @@ static void tty_flush_works(struct tty_struct *tty)
}
/**
- * release_one_tty - release tty structure memory
+ * release_one_tty - release tty structure memory
* @work: work of tty we are obliterating
*
* Releases memory associated with a tty structure, and clears out the
@@ -1552,7 +1556,7 @@ static void queue_release_one_tty(struct kref *kref)
}
/**
- * tty_kref_put - release a tty kref
+ * tty_kref_put - release a tty kref
* @tty: tty device
*
* Release a reference to the @tty device and if need be let the kref layer
@@ -1566,7 +1570,7 @@ void tty_kref_put(struct tty_struct *tty)
EXPORT_SYMBOL(tty_kref_put);
/**
- * release_tty - release tty structure memory
+ * release_tty - release tty structure memory
* @tty: tty device release
* @idx: index of the tty device release
*
@@ -1643,7 +1647,7 @@ static int tty_release_checks(struct tty_struct *tty, int idx)
}
/**
- * tty_kclose - closes tty opened by tty_kopen
+ * tty_kclose - closes tty opened by tty_kopen
* @tty: tty device
*
* Performs the final steps to release and free a tty device. It is the same as
@@ -1673,7 +1677,7 @@ void tty_kclose(struct tty_struct *tty)
EXPORT_SYMBOL_GPL(tty_kclose);
/**
- * tty_release_struct - release a tty struct
+ * tty_release_struct - release a tty struct
* @tty: tty device
* @idx: index of the tty
*
@@ -1702,7 +1706,7 @@ void tty_release_struct(struct tty_struct *tty, int idx)
EXPORT_SYMBOL_GPL(tty_release_struct);
/**
- * tty_release - vfs callback for close
+ * tty_release - vfs callback for close
* @inode: inode of tty
* @filp: file pointer for handle to tty
*
@@ -1983,7 +1987,7 @@ out:
}
/**
- * tty_kopen_exclusive - open a tty device for kernel
+ * tty_kopen_exclusive - open a tty device for kernel
* @device: dev_t of device to open
*
* Opens tty exclusively for kernel. Performs the driver lookup, makes sure
@@ -2003,7 +2007,7 @@ struct tty_struct *tty_kopen_exclusive(dev_t device)
EXPORT_SYMBOL_GPL(tty_kopen_exclusive);
/**
- * tty_kopen_shared - open a tty device for shared in-kernel use
+ * tty_kopen_shared - open a tty device for shared in-kernel use
* @device: dev_t of device to open
*
* Opens an already existing tty for in-kernel use. Compared to
@@ -2018,7 +2022,7 @@ struct tty_struct *tty_kopen_shared(dev_t device)
EXPORT_SYMBOL_GPL(tty_kopen_shared);
/**
- * tty_open_by_driver - open a tty device
+ * tty_open_by_driver - open a tty device
* @device: dev_t of device to open
* @filp: file pointer to tty
*
@@ -2086,7 +2090,7 @@ out:
}
/**
- * tty_open - open a tty device
+ * tty_open - open a tty device
* @inode: inode of device file
* @filp: file pointer to tty
*
@@ -2180,7 +2184,7 @@ retry_open:
/**
- * tty_poll - check tty status
+ * tty_poll - check tty status
* @filp: file being polled
* @wait: poll wait structures to update
*
@@ -2258,7 +2262,7 @@ static int tty_fasync(int fd, struct file *filp, int on)
static bool tty_legacy_tiocsti __read_mostly = IS_ENABLED(CONFIG_LEGACY_TIOCSTI);
/**
- * tiocsti - fake input character
+ * tiocsti - fake input character
* @tty: tty to fake input into
* @p: pointer to character
*
@@ -2295,7 +2299,7 @@ static int tiocsti(struct tty_struct *tty, char __user *p)
}
/**
- * tiocgwinsz - implement window query ioctl
+ * tiocgwinsz - implement window query ioctl
* @tty: tty
* @arg: user buffer for result
*
@@ -2316,7 +2320,7 @@ static int tiocgwinsz(struct tty_struct *tty, struct winsize __user *arg)
}
/**
- * tty_do_resize - resize event
+ * tty_do_resize - resize event
* @tty: tty being resized
* @ws: new dimensions
*
@@ -2346,7 +2350,7 @@ done:
EXPORT_SYMBOL(tty_do_resize);
/**
- * tiocswinsz - implement window size set ioctl
+ * tiocswinsz - implement window size set ioctl
* @tty: tty side of tty
* @arg: user buffer for result
*
@@ -2373,7 +2377,7 @@ static int tiocswinsz(struct tty_struct *tty, struct winsize __user *arg)
}
/**
- * tioccons - allow admin to move logical console
+ * tioccons - allow admin to move logical console
* @file: the file to become console
*
* Allow the administrator to move the redirected console device.
@@ -2412,7 +2416,7 @@ static int tioccons(struct file *file)
}
/**
- * tiocsetd - set line discipline
+ * tiocsetd - set line discipline
* @tty: tty device
* @p: pointer to user data
*
@@ -2434,7 +2438,7 @@ static int tiocsetd(struct tty_struct *tty, int __user *p)
}
/**
- * tiocgetd - get line discipline
+ * tiocgetd - get line discipline
* @tty: tty device
* @p: pointer to user data
*
@@ -2457,7 +2461,7 @@ static int tiocgetd(struct tty_struct *tty, int __user *p)
}
/**
- * send_break - performed time break
+ * send_break - performed time break
* @tty: device to break on
* @duration: timeout in mS
*
@@ -2498,7 +2502,7 @@ static int send_break(struct tty_struct *tty, unsigned int duration)
}
/**
- * tty_tiocmget - get modem status
+ * tty_tiocmget - get modem status
* @tty: tty device
* @p: pointer to result
*
@@ -2521,7 +2525,7 @@ static int tty_tiocmget(struct tty_struct *tty, int __user *p)
}
/**
- * tty_tiocmset - set modem status
+ * tty_tiocmset - set modem status
* @tty: tty device
* @cmd: command - clear bits, set bits or set all
* @p: pointer to desired bits
@@ -2562,7 +2566,7 @@ static int tty_tiocmset(struct tty_struct *tty, unsigned int cmd,
}
/**
- * tty_get_icount - get tty statistics
+ * tty_get_icount - get tty statistics
* @tty: tty device
* @icount: output parameter
*
@@ -3125,7 +3129,7 @@ struct tty_struct *alloc_tty_struct(struct tty_driver *driver, int idx)
}
/**
- * tty_put_char - write one character to a tty
+ * tty_put_char - write one character to a tty
* @tty: tty
* @ch: character to write
*
@@ -3303,7 +3307,7 @@ void tty_unregister_device(struct tty_driver *driver, unsigned index)
EXPORT_SYMBOL(tty_unregister_device);
/**
- * __tty_alloc_driver -- allocate tty driver
+ * __tty_alloc_driver - allocate tty driver
* @lines: count of lines this driver can handle at most
* @owner: module which is responsible for this driver
* @flags: some of %TTY_DRIVER_ flags, will be set in driver->flags
@@ -3396,7 +3400,7 @@ static void destruct_tty_driver(struct kref *kref)
}
/**
- * tty_driver_kref_put -- drop a reference to a tty driver
+ * tty_driver_kref_put - drop a reference to a tty driver
* @driver: driver of which to drop the reference
*
* The final put will destroy and free up the driver.
@@ -3408,7 +3412,7 @@ void tty_driver_kref_put(struct tty_driver *driver)
EXPORT_SYMBOL(tty_driver_kref_put);
/**
- * tty_register_driver -- register a tty driver
+ * tty_register_driver - register a tty driver
* @driver: driver to register
*
* Called by a tty driver to register itself.
@@ -3473,7 +3477,7 @@ err:
EXPORT_SYMBOL(tty_register_driver);
/**
- * tty_unregister_driver -- unregister a tty driver
+ * tty_unregister_driver - unregister a tty driver
* @driver: driver to unregister
*
* Called by a tty driver to unregister itself.
@@ -3611,7 +3615,6 @@ static struct ctl_table tty_table[] = {
.extra1 = SYSCTL_ZERO,
.extra2 = SYSCTL_ONE,
},
- { }
};
/*