[PATCH 08/15] tty: audit: Track tty association with dev_t

Use dev_t instead of separate major/minor fields to track tty audit buffer association. Signed-off-by: Peter Hurley <peter(a)hurleysoftware.com&gt; --- drivers/tty/tty_audit.c | 32 ++++++++++++++------------------ 1 file changed, 14 insertions(+), 18 deletions(-) diff --git a/drivers/tty/tty_audit.c b/drivers/tty/tty_audit.c index 6b82c3c..50380d8 100644 --- a/drivers/tty/tty_audit.c +++ b/drivers/tty/tty_audit.c @@ -16,7 +16,7 @@ struct tty_audit_buf { atomic_t count; struct mutex mutex; /* Protects all data below */ - int major, minor; /* The TTY which the data is from */ + dev_t dev; /* The TTY which the data is from */ unsigned icanon:1; size_t valid; unsigned char *data; /* Allocated size N_TTY_BUF_SIZE */ @@ -34,8 +34,7 @@ static struct tty_audit_buf *tty_audit_buf_alloc(void) goto err_buf; atomic_set(&buf->count, 1); mutex_init(&buf->mutex); - buf->major = 0; - buf->minor = 0; + buf->dev = MKDEV(0, 0); buf->icanon = 0; buf->valid = 0; return buf; @@ -59,7 +58,7 @@ static void tty_audit_buf_put(struct tty_audit_buf *buf) tty_audit_buf_free(buf); } -static void tty_audit_log(const char *description, int major, int minor, +static void tty_audit_log(const char *description, dev_t dev, unsigned char *data, size_t size) { struct audit_buffer *ab; @@ -75,7 +74,7 @@ static void tty_audit_log(const char *description, int major, int minor, audit_log_format(ab, "%s pid=%u uid=%u auid=%u ses=%u major=%d" " minor=%d comm=", description, pid, uid, - loginuid, sessionid, major, minor); + loginuid, sessionid, MAJOR(dev), MINOR(dev)); get_task_comm(name, tsk); audit_log_untrustedstring(ab, name); audit_log_format(ab, " data="); @@ -98,7 +97,7 @@ static void tty_audit_buf_push(struct tty_audit_buf *buf) buf->valid = 0; return; } - tty_audit_log("tty", buf->major, buf->minor, buf->data, buf->valid); + tty_audit_log("tty", buf->dev, buf->data, buf->valid); buf->valid = 0; } @@ -141,7 +140,8 @@ void tty_audit_fork(struct signal_struct *sig) void tty_audit_tiocsti(struct tty_struct *tty, char ch) { struct tty_audit_buf *buf; - int major, minor, should_audit; + dev_t dev; + int should_audit; unsigned long flags; spin_lock_irqsave(&current->sighand->siglock, flags); @@ -151,11 +151,10 @@ void tty_audit_tiocsti(struct tty_struct *tty, char ch) atomic_inc(&buf->count); spin_unlock_irqrestore(&current->sighand->siglock, flags); - major = tty->driver->major; - minor = tty->driver->minor_start + tty->index; + dev = MKDEV(tty->driver->major, tty->driver->minor_start) + tty->index; if (buf) { mutex_lock(&buf->mutex); - if (buf->major == major && buf->minor == minor) + if (buf->dev == dev) tty_audit_buf_push(buf); mutex_unlock(&buf->mutex); tty_audit_buf_put(buf); @@ -167,7 +166,7 @@ void tty_audit_tiocsti(struct tty_struct *tty, char ch) auid = audit_get_loginuid(current); sessionid = audit_get_sessionid(current); - tty_audit_log("ioctl=TIOCSTI", major, minor, &ch, 1); + tty_audit_log("ioctl=TIOCSTI", dev, &ch, 1); } } @@ -260,10 +259,10 @@ static struct tty_audit_buf *tty_audit_buf_get(void) void tty_audit_add_data(struct tty_struct *tty, const void *data, size_t size) { struct tty_audit_buf *buf; - int major, minor; int audit_log_tty_passwd; unsigned long flags; unsigned int icanon = !!L_ICANON(tty); + dev_t dev; if (unlikely(size == 0)) return; @@ -283,13 +282,10 @@ void tty_audit_add_data(struct tty_struct *tty, const void *data, size_t size) return; mutex_lock(&buf->mutex); - major = tty->driver->major; - minor = tty->driver->minor_start + tty->index; - if (buf->major != major || buf->minor != minor - || buf->icanon != icanon) { + dev = MKDEV(tty->driver->major, tty->driver->minor_start) + tty->index; + if (buf->dev != dev || buf->icanon != icanon) { tty_audit_buf_push(buf); - buf->major = major; - buf->minor = minor; + buf->dev = dev; buf->icanon = icanon; } do { -- 2.6.3