summaryrefslogtreecommitdiffstats
path: root/drivers/char
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/Kconfig16
-rw-r--r--drivers/char/Makefile2
-rw-r--r--drivers/char/bsr.c84
-rw-r--r--drivers/char/hpet.c2
-rw-r--r--drivers/char/hvc_console.c13
-rw-r--r--drivers/char/hvc_console.h2
-rw-r--r--drivers/char/hvc_iseries.c4
-rw-r--r--drivers/char/hvc_iucv.c850
-rw-r--r--drivers/char/hvc_udbg.c96
-rw-r--r--drivers/char/hvc_vio.c4
-rw-r--r--drivers/char/hvcs.c2
-rw-r--r--drivers/char/hvsi.c2
-rw-r--r--drivers/char/nvram.c264
-rw-r--r--drivers/char/sysrq.c18
-rw-r--r--drivers/char/tty_audit.c76
-rw-r--r--drivers/char/tty_io.c1
16 files changed, 1238 insertions, 198 deletions
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 43d6ba83a19..c602b547cc6 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -622,6 +622,16 @@ config HVC_BEAT
help
Toshiba's Cell Reference Set Beat Console device driver
+config HVC_IUCV
+ bool "z/VM IUCV Hypervisor console support (VM only)"
+ depends on S390
+ select HVC_DRIVER
+ select IUCV
+ default y
+ help
+ This driver provides a Hypervisor console (HVC) back-end to access
+ a Linux (console) terminal via a z/VM IUCV communication path.
+
config HVC_XEN
bool "Xen Hypervisor Console support"
depends on XEN
@@ -631,6 +641,12 @@ config HVC_XEN
help
Xen virtual console device driver
+config HVC_UDBG
+ bool "udbg based fake hypervisor console"
+ depends on PPC && EXPERIMENTAL
+ select HVC_DRIVER
+ default n
+
config VIRTIO_CONSOLE
tristate "Virtio console"
depends on VIRTIO
diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index 438f71317c5..9caf5b5ad1c 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -50,6 +50,8 @@ obj-$(CONFIG_HVC_BEAT) += hvc_beat.o
obj-$(CONFIG_HVC_DRIVER) += hvc_console.o
obj-$(CONFIG_HVC_IRQ) += hvc_irq.o
obj-$(CONFIG_HVC_XEN) += hvc_xen.o
+obj-$(CONFIG_HVC_IUCV) += hvc_iucv.o
+obj-$(CONFIG_HVC_UDBG) += hvc_udbg.o
obj-$(CONFIG_VIRTIO_CONSOLE) += virtio_console.o
obj-$(CONFIG_RAW_DRIVER) += raw.o
obj-$(CONFIG_SGI_SNSC) += snsc.o snsc_event.o
diff --git a/drivers/char/bsr.c b/drivers/char/bsr.c
index 456f54db73e..977dfb1096a 100644
--- a/drivers/char/bsr.c
+++ b/drivers/char/bsr.c
@@ -60,6 +60,8 @@ struct bsr_dev {
unsigned bsr_num; /* bsr id number for its type */
int bsr_minor;
+ struct list_head bsr_list;
+
dev_t bsr_dev;
struct cdev bsr_cdev;
struct device *bsr_device;
@@ -67,8 +69,8 @@ struct bsr_dev {
};
-static unsigned num_bsr_devs;
-static struct bsr_dev *bsr_devs;
+static unsigned total_bsr_devs;
+static struct list_head bsr_devs = LIST_HEAD_INIT(bsr_devs);
static struct class *bsr_class;
static int bsr_major;
@@ -146,24 +148,25 @@ const static struct file_operations bsr_fops = {
static void bsr_cleanup_devs(void)
{
- int i;
- for (i=0 ; i < num_bsr_devs; i++) {
- struct bsr_dev *cur = bsr_devs + i;
+ struct bsr_dev *cur, *n;
+
+ list_for_each_entry_safe(cur, n, &bsr_devs, bsr_list) {
if (cur->bsr_device) {
cdev_del(&cur->bsr_cdev);
device_del(cur->bsr_device);
}
+ list_del(&cur->bsr_list);
+ kfree(cur);
}
-
- kfree(bsr_devs);
}
-static int bsr_create_devs(struct device_node *bn)
+static int bsr_add_node(struct device_node *bn)
{
- int bsr_stride_len, bsr_bytes_len;
+ int bsr_stride_len, bsr_bytes_len, num_bsr_devs;
const u32 *bsr_stride;
const u32 *bsr_bytes;
unsigned i;
+ int ret = -ENODEV;
bsr_stride = of_get_property(bn, "ibm,lock-stride", &bsr_stride_len);
bsr_bytes = of_get_property(bn, "ibm,#lock-bytes", &bsr_bytes_len);
@@ -171,35 +174,36 @@ static int bsr_create_devs(struct device_node *bn)
if (!bsr_stride || !bsr_bytes ||
(bsr_stride_len != bsr_bytes_len)) {
printk(KERN_ERR "bsr of-node has missing/incorrect property\n");
- return -ENODEV;
+ return ret;
}
num_bsr_devs = bsr_bytes_len / sizeof(u32);
- /* only a warning, its informational since we'll fail and exit */
- WARN_ON(num_bsr_devs > BSR_MAX_DEVS);
-
- bsr_devs = kzalloc(sizeof(struct bsr_dev) * num_bsr_devs, GFP_KERNEL);
- if (!bsr_devs)
- return -ENOMEM;
-
for (i = 0 ; i < num_bsr_devs; i++) {
- struct bsr_dev *cur = bsr_devs + i;
+ struct bsr_dev *cur = kzalloc(sizeof(struct bsr_dev),
+ GFP_KERNEL);
struct resource res;
int result;
+ if (!cur) {
+ printk(KERN_ERR "Unable to alloc bsr dev\n");
+ ret = -ENOMEM;
+ goto out_err;
+ }
+
result = of_address_to_resource(bn, i, &res);
if (result < 0) {
- printk(KERN_ERR "bsr of-node has invalid reg property\n");
- goto out_err;
+ printk(KERN_ERR "bsr of-node has invalid reg property, skipping\n");
+ kfree(cur);
+ continue;
}
- cur->bsr_minor = i;
+ cur->bsr_minor = i + total_bsr_devs;
cur->bsr_addr = res.start;
cur->bsr_len = res.end - res.start + 1;
cur->bsr_bytes = bsr_bytes[i];
cur->bsr_stride = bsr_stride[i];
- cur->bsr_dev = MKDEV(bsr_major, i);
+ cur->bsr_dev = MKDEV(bsr_major, i + total_bsr_devs);
switch(cur->bsr_bytes) {
case 8:
@@ -220,14 +224,15 @@ static int bsr_create_devs(struct device_node *bn)
}
cur->bsr_num = bsr_types[cur->bsr_type];
- bsr_types[cur->bsr_type] = cur->bsr_num + 1;
snprintf(cur->bsr_name, 32, "bsr%d_%d",
cur->bsr_bytes, cur->bsr_num);
cdev_init(&cur->bsr_cdev, &bsr_fops);
result = cdev_add(&cur->bsr_cdev, cur->bsr_dev, 1);
- if (result)
+ if (result) {
+ kfree(cur);
goto out_err;
+ }
cur->bsr_device = device_create(bsr_class, NULL, cur->bsr_dev,
cur, cur->bsr_name);
@@ -235,16 +240,37 @@ static int bsr_create_devs(struct device_node *bn)
printk(KERN_ERR "device_create failed for %s\n",
cur->bsr_name);
cdev_del(&cur->bsr_cdev);
+ kfree(cur);
goto out_err;
}
+
+ bsr_types[cur->bsr_type] = cur->bsr_num + 1;
+ list_add_tail(&cur->bsr_list, &bsr_devs);
}
+ total_bsr_devs += num_bsr_devs;
+
return 0;
out_err:
bsr_cleanup_devs();
- return -ENODEV;
+ return ret;
+}
+
+static int bsr_create_devs(struct device_node *bn)
+{
+ int ret;
+
+ while (bn) {
+ ret = bsr_add_node(bn);
+ if (ret) {
+ of_node_put(bn);
+ return ret;
+ }
+ bn = of_find_compatible_node(bn, NULL, "ibm,bsr");
+ }
+ return 0;
}
static int __init bsr_init(void)
@@ -254,7 +280,7 @@ static int __init bsr_init(void)
int ret = -ENODEV;
int result;
- np = of_find_compatible_node(NULL, "ibm,bsr", "ibm,bsr");
+ np = of_find_compatible_node(NULL, NULL, "ibm,bsr");
if (!np)
goto out_err;
@@ -272,10 +298,10 @@ static int __init bsr_init(void)
goto out_err_2;
}
- if ((ret = bsr_create_devs(np)) < 0)
+ if ((ret = bsr_create_devs(np)) < 0) {
+ np = NULL;
goto out_err_3;
-
- of_node_put(np);
+ }
return 0;
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index 53fdc7ff387..32b8bbf5003 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -46,7 +46,7 @@
/*
* The High Precision Event Timer driver.
* This driver is closely modelled after the rtc.c driver.
- * http://www.intel.com/hardwaredesign/hpetspec.htm
+ * http://www.intel.com/hardwaredesign/hpetspec_1.pdf
*/
#define HPET_USER_FREQ (64)
#define HPET_DRIFT (500)
diff --git a/drivers/char/hvc_console.c b/drivers/char/hvc_console.c
index 5b819b12675..fb57f67bb42 100644
--- a/drivers/char/hvc_console.c
+++ b/drivers/char/hvc_console.c
@@ -642,8 +642,11 @@ int hvc_poll(struct hvc_struct *hp)
/* Handle the SysRq Hack */
/* XXX should support a sequence */
if (buf[i] == '\x0f') { /* ^O */
- sysrq_pressed = 1;
- continue;
+ /* if ^O is pressed again, reset
+ * sysrq_pressed and flip ^O char */
+ sysrq_pressed = !sysrq_pressed;
+ if (sysrq_pressed)
+ continue;
} else if (sysrq_pressed) {
handle_sysrq(buf[i], tty);
sysrq_pressed = 0;
@@ -689,10 +692,8 @@ EXPORT_SYMBOL_GPL(hvc_poll);
*/
void hvc_resize(struct hvc_struct *hp, struct winsize ws)
{
- if ((hp->ws.ws_row != ws.ws_row) || (hp->ws.ws_col != ws.ws_col)) {
- hp->ws = ws;
- schedule_work(&hp->tty_resize);
- }
+ hp->ws = ws;
+ schedule_work(&hp->tty_resize);
}
/*
diff --git a/drivers/char/hvc_console.h b/drivers/char/hvc_console.h
index 8297dbc2e6e..3c85d78c975 100644
--- a/drivers/char/hvc_console.h
+++ b/drivers/char/hvc_console.h
@@ -48,7 +48,7 @@ struct hvc_struct {
spinlock_t lock;
int index;
struct tty_struct *tty;
- unsigned int count;
+ int count;
int do_wakeup;
char *outbuf;
int outbuf_size;
diff --git a/drivers/char/hvc_iseries.c b/drivers/char/hvc_iseries.c
index b74a2f8ab90..449727b6166 100644
--- a/drivers/char/hvc_iseries.c
+++ b/drivers/char/hvc_iseries.c
@@ -575,8 +575,10 @@ static int __init hvc_find_vtys(void)
* of console adapters.
*/
if ((num_found >= MAX_NR_HVC_CONSOLES) ||
- (num_found >= VTTY_PORTS))
+ (num_found >= VTTY_PORTS)) {
+ of_node_put(vty);
break;
+ }
vtermno = of_get_property(vty, "reg", NULL);
if (!vtermno)
diff --git a/drivers/char/hvc_iucv.c b/drivers/char/hvc_iucv.c
new file mode 100644
index 00000000000..5ea7d7713fc
--- /dev/null
+++ b/drivers/char/hvc_iucv.c
@@ -0,0 +1,850 @@
+/*
+ * hvc_iucv.c - z/VM IUCV back-end for the Hypervisor Console (HVC)
+ *
+ * This back-end for HVC provides terminal access via
+ * z/VM IUCV communication paths.
+ *
+ * Copyright IBM Corp. 2008.
+ *
+ * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
+ */
+#define KMSG_COMPONENT "hvc_iucv"
+
+#include <linux/types.h>
+#include <asm/ebcdic.h>
+#include <linux/mempool.h>
+#include <linux/module.h>
+#include <linux/tty.h>
+#include <net/iucv/iucv.h>
+
+#include "hvc_console.h"
+
+
+/* HVC backend for z/VM IUCV */
+#define HVC_IUCV_MAGIC 0xc9e4c3e5
+#define MAX_HVC_IUCV_LINES HVC_ALLOC_TTY_ADAPTERS
+#define MEMPOOL_MIN_NR (PAGE_SIZE / sizeof(struct iucv_tty_buffer)/4)
+
+/* IUCV TTY message */
+#define MSG_VERSION 0x02 /* Message version */
+#define MSG_TYPE_ERROR 0x01 /* Error message */
+#define MSG_TYPE_TERMENV 0x02 /* Terminal environment variable */
+#define MSG_TYPE_TERMIOS 0x04 /* Terminal IO struct update */
+#define MSG_TYPE_WINSIZE 0x08 /* Terminal window size update */
+#define MSG_TYPE_DATA 0x10 /* Terminal data */
+
+#define MSG_SIZE(s) ((s) + offsetof(struct iucv_tty_msg, data))
+struct iucv_tty_msg {
+ u8 version; /* Message version */
+ u8 type; /* Message type */
+#define MSG_MAX_DATALEN (~(u16)0)
+ u16 datalen; /* Payload length */
+ u8 data[]; /* Payload buffer */
+} __attribute__((packed));
+
+enum iucv_state_t {
+ IUCV_DISCONN = 0,
+ IUCV_CONNECTED = 1,
+ IUCV_SEVERED = 2,
+};
+
+enum tty_state_t {
+ TTY_CLOSED = 0,
+ TTY_OPENED = 1,
+};
+
+struct hvc_iucv_private {
+ struct hvc_struct *hvc; /* HVC console struct reference */
+ u8 srv_name[8]; /* IUCV service name (ebcdic) */
+ enum iucv_state_t iucv_state; /* IUCV connection status */
+ enum tty_state_t tty_state; /* TTY status */
+ struct iucv_path *path; /* IUCV path pointer */
+ spinlock_t lock; /* hvc_iucv_private lock */
+ struct list_head tty_outqueue; /* outgoing IUCV messages */
+ struct list_head tty_inqueue; /* incoming IUCV messages */
+};
+
+struct iucv_tty_buffer {
+ struct list_head list; /* list pointer */
+ struct iucv_message msg; /* store an incoming IUCV message */
+ size_t offset; /* data buffer offset */
+ struct iucv_tty_msg *mbuf; /* buffer to store input/output data */
+};
+
+/* IUCV callback handler */
+static int hvc_iucv_path_pending(struct iucv_path *, u8[8], u8[16]);
+static void hvc_iucv_path_severed(struct iucv_path *, u8[16]);
+static void hvc_iucv_msg_pending(struct iucv_path *, struct iucv_message *);
+static void hvc_iucv_msg_complete(struct iucv_path *, struct iucv_message *);
+
+
+/* Kernel module parameters */
+static unsigned long hvc_iucv_devices;
+
+/* Array of allocated hvc iucv tty lines... */
+static struct hvc_iucv_private *hvc_iucv_table[MAX_HVC_IUCV_LINES];
+
+/* Kmem cache and mempool for iucv_tty_buffer elements */
+static struct kmem_cache *hvc_iucv_buffer_cache;
+static mempool_t *hvc_iucv_mempool;
+
+/* IUCV handler callback functions */
+static struct iucv_handler hvc_iucv_handler = {
+ .path_pending = hvc_iucv_path_pending,
+ .path_severed = hvc_iucv_path_severed,
+ .message_complete = hvc_iucv_msg_complete,
+ .message_pending = hvc_iucv_msg_pending,
+};
+
+
+/**
+ * hvc_iucv_get_private() - Return a struct hvc_iucv_private instance.
+ * @num: The HVC virtual terminal number (vtermno)
+ *
+ * This function returns the struct hvc_iucv_private instance that corresponds
+ * to the HVC virtual terminal number specified as parameter @num.
+ */
+struct hvc_iucv_private *hvc_iucv_get_private(uint32_t num)
+{
+ if ((num < HVC_IUCV_MAGIC) || (num - HVC_IUCV_MAGIC > hvc_iucv_devices))
+ return NULL;
+ return hvc_iucv_table[num - HVC_IUCV_MAGIC];
+}
+
+/**
+ * alloc_tty_buffer() - Returns a new struct iucv_tty_buffer element.
+ * @size: Size of the internal buffer used to store data.
+ * @flags: Memory allocation flags passed to mempool.
+ *
+ * This function allocates a new struct iucv_tty_buffer element and, optionally,
+ * allocates an internal data buffer with the specified size @size.
+ * Note: The total message size arises from the internal buffer size and the
+ * members of the iucv_tty_msg structure.
+ *
+ * The function returns NULL if memory allocation has failed.
+ */
+static struct iucv_tty_buffer *alloc_tty_buffer(size_t size, gfp_t flags)
+{
+ struct iucv_tty_buffer *bufp;
+
+ bufp = mempool_alloc(hvc_iucv_mempool, flags);
+ if (!bufp)
+ return NULL;
+ memset(bufp, 0, sizeof(struct iucv_tty_buffer));
+
+ if (size > 0) {
+ bufp->msg.length = MSG_SIZE(size);
+ bufp->mbuf = kmalloc(bufp->msg.length, flags);
+ if (!bufp->mbuf) {
+ mempool_free(bufp, hvc_iucv_mempool);
+ return NULL;
+ }
+ bufp->mbuf->version = MSG_VERSION;
+ bufp->mbuf->type = MSG_TYPE_DATA;
+ bufp->mbuf->datalen = (u16) size;
+ }
+ return bufp;
+}
+
+/**
+ * destroy_tty_buffer() - destroy struct iucv_tty_buffer element.
+ * @bufp: Pointer to a struct iucv_tty_buffer element, SHALL NOT be NULL.
+ *
+ * The destroy_tty_buffer() function frees the internal data buffer and returns
+ * the struct iucv_tty_buffer element back to the mempool for freeing.
+ */
+static void destroy_tty_buffer(struct iucv_tty_buffer *bufp)
+{
+ kfree(bufp->mbuf);
+ mempool_free(bufp, hvc_iucv_mempool);
+}
+
+/**
+ * destroy_tty_buffer_list() - call destroy_tty_buffer() for each list element.
+ * @list: List head pointer to a list containing struct iucv_tty_buffer
+ * elements.
+ *
+ * Calls destroy_tty_buffer() for each struct iucv_tty_buffer element in the
+ * list @list.
+ */
+static void destroy_tty_buffer_list(struct list_head *list)
+{
+ struct iucv_tty_buffer *ent, *next;
+
+ list_for_each_entry_safe(ent, next, list, list) {
+ list_del(&ent->list);
+ destroy_tty_buffer(ent);
+ }
+}
+
+/**
+ * hvc_iucv_write() - Receive IUCV message write data to HVC console buffer.
+ * @priv: Pointer to hvc_iucv_private structure.
+ * @buf: HVC console buffer for writing received terminal data.
+ * @count: HVC console buffer size.
+ * @has_more_data: Pointer to an int variable.
+ *
+ * The function picks up pending messages from the input queue and receives
+ * the message data that is then written to the specified buffer @buf.
+ * If the buffer size @count is less than the data message size, then the
+ * message is kept on the input queue and @has_more_data is set to 1.
+ * If the message data has been entirely written, the message is removed from
+ * the input queue.
+ *
+ * The function returns the number of bytes written to the terminal, zero if
+ * there are no pending data messages available or if there is no established
+ * IUCV path.
+ * If the IUCV path has been severed, then -EPIPE is returned to cause a
+ * hang up (that is issued by the HVC console layer).
+ */
+static int hvc_iucv_write(struct hvc_iucv_private *priv,
+ char *buf, int count, int *has_more_data)
+{
+ struct iucv_tty_buffer *rb;
+ int written;
+ int rc;
+
+ /* Immediately return if there is no IUCV connection */
+ if (priv->iucv_state == IUCV_DISCONN)
+ return 0;
+
+ /* If the IUCV path has been severed, return -EPIPE to inform the
+ * hvc console layer to hang up the tty device. */
+ if (priv->iucv_state == IUCV_SEVERED)
+ return -EPIPE;
+
+ /* check if there are pending messages */
+ if (list_empty(&priv->tty_inqueue))
+ return 0;
+
+ /* receive a iucv message and flip data to the tty (ldisc) */
+ rb = list_first_entry(&priv->tty_inqueue, struct iucv_tty_buffer, list);
+
+ written = 0;
+ if (!rb->mbuf) { /* message not yet received ... */
+ /* allocate mem to store msg data; if no memory is available
+ * then leave the buffer on the list and re-try later */
+ rb->mbuf = kmalloc(rb->msg.length, GFP_ATOMIC);
+ if (!rb->mbuf)
+ return -ENOMEM;
+
+ rc = __iucv_message_receive(priv->path, &rb->msg, 0,
+ rb->mbuf, rb->msg.length, NULL);
+ switch (rc) {
+ case 0: /* Successful */
+ break;
+ case 2: /* No message found */
+ case 9: /* Message purged */
+ break;
+ default:
+ written = -EIO;
+ }
+ /* remove buffer if an error has occured or received data
+ * is not correct */
+ if (rc || (rb->mbuf->version != MSG_VERSION) ||
+ (rb->msg.length != MSG_SIZE(rb->mbuf->datalen)))
+ goto out_remove_buffer;
+ }
+
+ switch (rb->mbuf->type) {
+ case MSG_TYPE_DATA:
+ written = min_t(int, rb->mbuf->datalen - rb->offset, count);
+ memcpy(buf, rb->mbuf->data + rb->offset, written);
+ if (written < (rb->mbuf->datalen - rb->offset)) {
+ rb->offset += written;
+ *has_more_data = 1;
+ goto out_written;
+ }
+ break;
+
+ case MSG_TYPE_WINSIZE:
+ if (rb->mbuf->datalen != sizeof(struct winsize))
+ break;
+ hvc_resize(priv->hvc, *((struct winsize *)rb->mbuf->data));
+ break;
+
+ case MSG_TYPE_ERROR: /* ignored ... */
+ case MSG_TYPE_TERMENV: /* ignored ... */
+ case MSG_TYPE_TERMIOS: /* ignored ... */
+ break;
+ }
+
+out_remove_buffer:
+ list_del(&rb->list);
+ destroy_tty_buffer(rb);
+ *has_more_data = !list_empty(&priv->tty_inqueue);
+
+out_written:
+ return written;
+}
+
+/**
+ * hvc_iucv_get_chars() - HVC get_chars operation.
+ * @vtermno: HVC virtual terminal number.
+ * @buf: Pointer to a buffer to store data
+ * @count: Size of buffer available for writing
+ *
+ * The hvc_console thread calls this method to read characters from
+ * the terminal backend. If an IUCV communication path has been established,
+ * pending IUCV messages are received and data is copied into buffer @buf
+ * up to @count bytes.
+ *
+ * Locking: The routine gets called under an irqsave() spinlock; and
+ * the routine locks the struct hvc_iucv_private->lock to call
+ * helper functions.
+ */
+static int hvc_iucv_get_chars(uint32_t vtermno, char *buf, int count)
+{
+ struct hvc_iucv_private *priv = hvc_iucv_get_private(vtermno);
+ int written;
+ int has_more_data;
+
+ if (count <= 0)
+ return 0;
+
+ if (!priv)
+ return -ENODEV;
+
+ spin_lock(&priv->lock);
+ has_more_data = 0;
+ written = hvc_iucv_write(priv, buf, count, &has_more_data);
+ spin_unlock(&priv->lock);
+
+ /* if there are still messages on the queue... schedule another run */
+ if (has_more_data)
+ hvc_kick();
+
+ return written;
+}
+
+/**
+ * hvc_iucv_send() - Send an IUCV message containing terminal data.
+ * @priv: Pointer to struct hvc_iucv_private instance.
+ * @buf: Buffer containing data to send.
+ * @size: Size of buffer and amount of data to send.
+ *
+ * If an IUCV communication path is established, the function copies the buffer
+ * data to a newly allocated struct iucv_tty_buffer element, sends the data and
+ * puts the element to the outqueue.
+ *
+ * If there is no IUCV communication path established, the function returns 0.
+ * If an existing IUCV communicaton path has been severed, the function returns
+ * -EPIPE (can be passed to HVC layer to cause a tty hangup).
+ */
+static int hvc_iucv_send(struct hvc_iucv_private *priv, const char *buf,
+ int count)
+{
+ struct iucv_tty_buffer *sb;
+ int rc;
+ u16 len;
+
+ if (priv->iucv_state == IUCV_SEVERED)
+ return -EPIPE;
+
+ if (priv->iucv_state == IUCV_DISCONN)
+ return 0;
+
+ len = min_t(u16, MSG_MAX_DATALEN, count);
+
+ /* allocate internal buffer to store msg data and also compute total
+ * message length */
+ sb = alloc_tty_buffer(len, GFP_ATOMIC);
+ if (!sb)
+ return -ENOMEM;
+
+ sb->mbuf->datalen = len;
+ memcpy(sb->mbuf->data, buf, len);
+
+ list_add_tail(&sb->list, &priv->tty_outqueue);
+
+ rc = __iucv_message_send(priv->path, &sb->msg, 0, 0,
+ (void *) sb->mbuf, sb->msg.length);
+ if (rc) {
+ list_del(&sb->list);
+ destroy_tty_buffer(sb);
+ len = 0;
+ }
+
+ return len;
+}
+
+/**
+ * hvc_iucv_put_chars() - HVC put_chars operation.
+ * @vtermno: HVC virtual terminal number.
+ * @buf: Pointer to an buffer to read data from
+ * @count: Size of buffer available for reading
+ *
+ * The hvc_console thread calls this method to write characters from
+ * to the terminal backend.
+ * The function calls hvc_iucv_send() under the lock of the
+ * struct hvc_iucv_private instance that corresponds to the tty @vtermno.
+ *
+ * Locking: The method gets called under an irqsave() spinlock; and
+ * locks struct hvc_iucv_private->lock.
+ */
+static int hvc_iucv_put_chars(uint32_t vtermno, const char *buf, int count)
+{
+ struct hvc_iucv_private *priv = hvc_iucv_get_private(vtermno);
+ int sent;
+
+ if (count <= 0)
+ return 0;
+
+ if (!priv)
+ return -ENODEV;
+
+ spin_lock(&priv->lock);
+ sent = hvc_iucv_send(priv, buf, count);
+ spin_unlock(&priv->lock);
+
+ return sent;
+}
+
+/**
+ * hvc_iucv_notifier_add() - HVC notifier for opening a TTY for the first time.
+ * @hp: Pointer to the HVC device (struct hvc_struct)
+ * @id: Additional data (originally passed to hvc_alloc): the index of an struct
+ * hvc_iucv_private instance.
+ *
+ * The function sets the tty state to TTY_OPEN for the struct hvc_iucv_private
+ * instance that is derived from @id. Always returns 0.
+ *
+ * Locking: struct hvc_iucv_private->lock, spin_lock_bh
+ */
+static int hvc_iucv_notifier_add(struct hvc_struct *hp, int id)
+{
+ struct hvc_iucv_private *priv;
+
+ priv = hvc_iucv_get_private(id);
+ if (!priv)
+ return 0;
+
+ spin_lock_bh(&priv->lock);
+ priv->tty_state = TTY_OPENED;
+ spin_unlock_bh(&priv->lock);
+
+ return 0;
+}
+
+/**
+ * hvc_iucv_cleanup() - Clean up function if the tty portion is finally closed.
+ * @priv: Pointer to the struct hvc_iucv_private instance.
+ *
+ * The functions severs the established IUCV communication path (if any), and
+ * destroy struct iucv_tty_buffer elements from the in- and outqueue. Finally,
+ * the functions resets the states to TTY_CLOSED and IUCV_DISCONN.
+ */
+static void hvc_iucv_cleanup(struct hvc_iucv_private *priv)
+{
+ destroy_tty_buffer_list(&priv->tty_outqueue);
+ destroy_tty_buffer_list(&priv->tty_inqueue);
+
+ priv->tty_state = TTY_CLOSED;
+ priv->iucv_state = IUCV_DISCONN;
+}
+
+/**
+ * hvc_iucv_notifier_hangup() - HVC notifier for tty hangups.
+ * @hp: Pointer to the HVC device (struct hvc_struct)
+ * @id: Additional data (originally passed to hvc_alloc): the index of an struct
+ * hvc_iucv_private instance.
+ *
+ * This routine notifies the HVC backend that a tty hangup (carrier loss,
+ * virtual or otherwise) has occured.
+ *
+ * The HVC backend for z/VM IUCV ignores virtual hangups (vhangup()), to keep
+ * an existing IUCV communication path established.
+ * (Background: vhangup() is called from user space (by getty or login) to
+ * disable writing to the tty by other applications).
+ *
+ * If the tty has been opened (e.g. getty) and an established IUCV path has been
+ * severed (we caused the tty hangup in that case), then the functions invokes
+ * hvc_iucv_cleanup() to clean up.
+ *
+ * Locking: struct hvc_iucv_private->lock
+ */
+static void hvc_iucv_notifier_hangup(struct hvc_struct *hp, int id)
+{
+ struct hvc_iucv_private *priv;
+
+ priv = hvc_iucv_get_private(id);
+ if (!priv)
+ return;
+
+ spin_lock_bh(&priv->lock);
+ /* NOTE: If the hangup was scheduled by ourself (from the iucv
+ * path_servered callback [IUCV_SEVERED]), then we have to
+ * finally clean up the tty backend structure and set state to
+ * TTY_CLOSED.
+ *
+ * If the tty was hung up otherwise (e.g. vhangup()), then we
+ * ignore this hangup and keep an established IUCV path open...
+ * (...the reason is that we are not able to connect back to the
+ * client if we disconnect on hang up) */
+ priv->tty_state = TTY_CLOSED;
+
+ if (priv->iucv_state == IUCV_SEVERED)
+ hvc_iucv_cleanup(priv);
+ spin_unlock_bh(&priv->lock);
+}
+
+/**
+ * hvc_iucv_notifier_del() - HVC notifier for closing a TTY for the last time.
+ * @hp: Pointer to the HVC device (struct hvc_struct)
+ * @id: Additional data (originally passed to hvc_alloc):
+ * the index of an struct hvc_iucv_private instance.
+ *
+ * This routine notifies the HVC backend that the last tty device file
+ * descriptor has been closed.
+ * The function calls hvc_iucv_cleanup() to clean up the struct hvc_iucv_private
+ * instance.
+ *
+ * Locking: struct hvc_iucv_private->lock
+ */
+static void hvc_iucv_notifier_del(struct hvc_struct *hp, int id)
+{
+ struct hvc_iucv_private *priv;
+ struct iucv_path *path;
+
+ priv = hvc_iucv_get_private(id);
+ if (!priv)
+ return;
+
+ spin_lock_bh(&priv->lock);
+ path = priv->path; /* save reference to IUCV path */
+ priv->path = NULL;
+ hvc_iucv_cleanup(priv);
+ spin_unlock_bh(&priv->lock);
+
+ /* sever IUCV path outside of priv->lock due to lock ordering of:
+ * priv->lock <--> iucv_table_lock */
+ if (path) {
+ iucv_path_sever(path, NULL);
+ iucv_path_free(path);
+ }
+}
+
+/**
+ * hvc_iucv_path_pending() - IUCV handler to process a connection request.
+ * @path: Pending path (struct iucv_path)
+ * @ipvmid: Originator z/VM system identifier
+ * @ipuser: User specified data for this path
+ * (AF_IUCV: port/service name and originator port)
+ *
+ * The function uses the @ipuser data to check to determine if the pending
+ * path belongs to a terminal managed by this HVC backend.
+ * If the check is successful, then an additional check is done to ensure
+ * that a terminal cannot be accessed multiple times (only one connection
+ * to a terminal is allowed). In that particular case, the pending path is
+ * severed. If it is the first connection, the pending path is accepted and
+ * associated to the struct hvc_iucv_private. The iucv state is updated to
+ * reflect that a communication path has been established.
+ *
+ * Returns 0 if the path belongs to a terminal managed by the this HVC backend;
+ * otherwise returns -ENODEV in order to dispatch this path to other handlers.
+ *
+ * Locking: struct hvc_iucv_private->lock
+ */
+static int hvc_iucv_path_pending(struct iucv_path *path,
+ u8 ipvmid[8], u8 ipuser[16])
+{
+ struct hvc_iucv_private *priv;
+ u8 nuser_data[16];
+ int i, rc;
+
+ priv = NULL;
+ for (i = 0; i < hvc_iucv_devices; i++)
+ if (hvc_iucv_table[i] &&
+ (0 == memcmp(hvc_iucv_table[i]->srv_name, ipuser, 8))) {
+ priv = hvc_iucv_table[i];
+ break;
+ }
+
+ if (!priv)
+ return -ENODEV;
+
+ spin_lock(&priv->lock);
+
+ /* If the terminal is already connected or being severed, then sever
+ * this path to enforce that there is only ONE established communication
+ * path per terminal. */
+ if (priv->iucv_state != IUCV_DISCONN) {
+ iucv_path_sever(path, ipuser);
+ iucv_path_free(path);
+ goto out_path_handled;
+ }
+
+ /* accept path */
+ memcpy(nuser_data, ipuser + 8, 8); /* remote service (for af_iucv) */
+ memcpy(nuser_data + 8, ipuser, 8); /* local service (for af_iucv) */
+ path->msglim = 0xffff; /* IUCV MSGLIMIT */
+ path->flags &= ~IUCV_IPRMDATA; /* TODO: use IUCV_IPRMDATA */
+ rc = iucv_path_accept(path, &hvc_iucv_handler, nuser_data, priv);
+ if (rc) {
+ iucv_path_sever(path, ipuser);
+ iucv_path_free(path);
+ goto out_path_handled;
+ }
+ priv->path = path;
+ priv->iucv_state = IUCV_CONNECTED;
+
+out_path_handled:
+ spin_unlock(&priv->lock);
+ return 0;
+}
+
+/**
+ * hvc_iucv_path_severed() - IUCV handler to process a path sever.
+ * @path: Pending path (struct iucv_path)
+ * @ipuser: User specified data for this path
+ * (AF_IUCV: port/service name and originator port)
+ *
+ * The function also severs the path (as required by the IUCV protocol) and
+ * sets the iucv state to IUCV_SEVERED for the associated struct
+ * hvc_iucv_private instance. Later, the IUCV_SEVERED state triggers a tty
+ * hangup (hvc_iucv_get_chars() / hvc_iucv_write()).
+ *
+ * If tty portion of the HVC is closed then clean up the outqueue in addition.
+ *
+ * Locking: struct hvc_iucv_private->lock
+ */
+static void hvc_iucv_path_severed(struct iucv_path *path, u8 ipuser[16])
+{
+ struct hvc_iucv_private *priv = path->private;
+
+ spin_lock(&priv->lock);
+ priv->iucv_state = IUCV_SEVERED;
+
+ /* NOTE: If the tty has not yet been opened by a getty program
+ * (e.g. to see console messages), then cleanup the
+ * hvc_iucv_private structure to allow re-connects.
+ *
+ * If the tty has been opened, the get_chars() callback returns
+ * -EPIPE to signal the hvc console layer to hang up the tty. */
+ priv->path = NULL;
+ if (priv->tty_state == TTY_CLOSED)
+ hvc_iucv_cleanup(priv);
+ spin_unlock(&priv->lock);
+
+ /* finally sever path (outside of priv->lock due to lock ordering) */
+ iucv_path_sever(path, ipuser);
+ iucv_path_free(path);
+}
+
+/**
+ * hvc_iucv_msg_pending() - IUCV handler to process an incoming IUCV message.
+ * @path: Pending path (struct iucv_path)
+ * @msg: Pointer to the IUCV message
+ *
+ * The function stores an incoming message on the input queue for later
+ * processing (by hvc_iucv_get_chars() / hvc_iucv_write()).
+ * However, if the tty has not yet been opened, the message is rejected.
+ *
+ * Locking: struct hvc_iucv_private->lock
+ */
+static void hvc_iucv_msg_pending(struct iucv_path *path,
+ struct iucv_message *msg)
+{
+ struct hvc_iucv_private *priv = path->private;
+ struct iucv_tty_buffer *rb;
+
+ spin_lock(&priv->lock);
+
+ /* reject messages if tty has not yet been opened */
+ if (priv->tty_state == TTY_CLOSED) {
+ iucv_message_reject(path, msg);
+ goto unlock_return;
+ }
+
+ /* allocate buffer an empty buffer element */
+ rb = alloc_tty_buffer(0, GFP_ATOMIC);
+ if (!rb) {
+ iucv_message_reject(path, msg);
+ goto unlock_return; /* -ENOMEM */
+ }
+ rb->msg = *msg;
+
+ list_add_tail(&rb->list, &priv->tty_inqueue);
+
+ hvc_kick(); /* wakup hvc console thread */
+
+unlock_return:
+ spin_unlock(&priv->lock);
+}
+
+/**
+ * hvc_iucv_msg_complete() - IUCV handler to process message completion
+ * @path: Pending path (struct iucv_path)
+ * @msg: Pointer to the IUCV message
+ *
+ * The function is called upon completion of message delivery and the
+ * message is removed from the outqueue. Additional delivery information
+ * can be found in msg->audit: rejected messages (0x040000 (IPADRJCT)) and
+ * purged messages (0x010000 (IPADPGNR)).
+ *
+ * Locking: struct hvc_iucv_private->lock
+ */
+static void hvc_iucv_msg_complete(struct iucv_path *path,
+ struct iucv_message *msg)
+{
+ struct hvc_iucv_private *priv = path->private;
+ struct iucv_tty_buffer *ent, *next;
+ LIST_HEAD(list_remove);
+
+ spin_lock(&priv->lock);
+ list_for_each_entry_safe(ent, next, &priv->tty_outqueue, list)
+ if (ent->msg.id == msg->id) {
+ list_move(&ent->list, &list_remove);
+ break;
+ }
+ spin_unlock(&priv->lock);
+ destroy_tty_buffer_list(&list_remove);
+}
+
+
+/* HVC operations */
+static struct hv_ops hvc_iucv_ops = {
+ .get_chars = hvc_iucv_get_chars,
+ .put_chars = hvc_iucv_put_chars,
+ .notifier_add = hvc_iucv_notifier_add,
+ .notifier_del = hvc_iucv_notifier_del,
+ .notifier_hangup = hvc_iucv_notifier_hangup,
+};
+
+/**
+ * hvc_iucv_alloc() - Allocates a new struct hvc_iucv_private instance
+ * @id: hvc_iucv_table index
+ *
+ * This function allocates a new hvc_iucv_private struct and put the
+ * instance into hvc_iucv_table at index @id.
+ * Returns 0 on success; otherwise non-zero.
+ */
+static int __init hvc_iucv_alloc(int id)
+{
+ struct hvc_iucv_private *priv;
+ char name[9];
+ int rc;
+
+ priv = kzalloc(sizeof(struct hvc_iucv_private), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ spin_lock_init(&priv->lock);
+ INIT_LIST_HEAD(&priv->tty_outqueue);
+ INIT_LIST_HEAD(&priv->tty_inqueue);
+
+ /* Finally allocate hvc */
+ priv->hvc = hvc_alloc(HVC_IUCV_MAGIC + id,
+ HVC_IUCV_MAGIC + id, &hvc_iucv_ops, PAGE_SIZE);
+ if (IS_ERR(priv->hvc)) {
+ rc = PTR_ERR(priv->hvc);
+ kfree(priv);
+ return rc;
+ }
+
+ /* setup iucv related information */
+ snprintf(name, 9, "ihvc%-4d", id);
+ memcpy(priv->srv_name, name, 8);
+ ASCEBC(priv->srv_name, 8);
+
+ hvc_iucv_table[id] = priv;
+ return 0;
+}
+
+/**
+ * hvc_iucv_init() - Initialization of HVC backend for z/VM IUCV
+ */
+static int __init hvc_iucv_init(void)
+{
+ int rc, i;
+
+ if (!MACHINE_IS_VM) {
+ pr_warning("The z/VM IUCV Hypervisor console cannot be "
+ "used without z/VM.\n");
+ return -ENODEV;
+ }
+
+ if (!hvc_iucv_devices)
+ return -ENODEV;
+
+ if (hvc_iucv_devices > MAX_HVC_IUCV_LINES)
+ return -EINVAL;
+
+ hvc_iucv_buffer_cache = kmem_cache_create(KMSG_COMPONENT,
+ sizeof(struct iucv_tty_buffer),
+ 0, 0, NULL);
+ if (!hvc_iucv_buffer_cache) {
+ pr_err("Not enough memory for driver initialization "
+ "(rs=%d).\n", 1);
+ return -ENOMEM;
+ }
+
+ hvc_iucv_mempool = mempool_create_slab_pool(MEMPOOL_MIN_NR,
+ hvc_iucv_buffer_cache);
+ if (!hvc_iucv_mempool) {
+ pr_err("Not enough memory for driver initialization "
+ "(rs=%d).\n", 2);
+ kmem_cache_destroy(hvc_iucv_buffer_cache);
+ return -ENOMEM;
+ }
+
+ /* allocate hvc_iucv_private structs */
+ for (i = 0; i < hvc_iucv_devices; i++) {
+ rc = hvc_iucv_alloc(i);
+ if (rc) {
+ pr_err("Could not create new z/VM IUCV HVC backend "
+ "rc=%d.\n", rc);
+ goto out_error_hvc;
+ }
+ }
+
+ /* register IUCV callback handler */
+ rc = iucv_register(&hvc_iucv_handler, 0);
+ if (rc) {
+ pr_err("Could not register iucv handler (rc=%d).\n", rc);
+ goto out_error_iucv;
+ }
+
+ return 0;
+
+out_error_iucv:
+ iucv_unregister(&hvc_iucv_handler, 0);
+out_error_hvc:
+ for (i = 0; i < hvc_iucv_devices; i++)
+ if (hvc_iucv_table[i]) {
+ if (hvc_iucv_table[i]->hvc)
+ hvc_remove(hvc_iucv_table[i]->hvc);
+ kfree(hvc_iucv_table[i]);
+ }
+ mempool_destroy(hvc_iucv_mempool);
+ kmem_cache_destroy(hvc_iucv_buffer_cache);
+ return rc;
+}
+
+/**
+ * hvc_iucv_console_init() - Early console initialization
+ */
+static int __init hvc_iucv_console_init(void)
+{
+ if (!MACHINE_IS_VM || !hvc_iucv_devices)
+ return -ENODEV;
+ return hvc_instantiate(HVC_IUCV_MAGIC, 0, &hvc_iucv_ops);
+}
+
+/**
+ * hvc_iucv_config() - Parsing of hvc_iucv= kernel command line parameter
+ * @val: Parameter value (numeric)
+ */
+static int __init hvc_iucv_config(char *val)
+{
+ return strict_strtoul(val, 10, &hvc_iucv_devices);
+}
+
+
+module_init(hvc_iucv_init);
+console_initcall(hvc_iucv_console_init);
+__setup("hvc_iucv=", hvc_iucv_config);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("HVC back-end for z/VM IUCV.");
+MODULE_AUTHOR("Hendrik Brueckner <brueckner@linux.vnet.ibm.com>");
diff --git a/drivers/char/hvc_udbg.c b/drivers/char/hvc_udbg.c
new file mode 100644
index 00000000000..bd63ba878a5
--- /dev/null
+++ b/drivers/char/hvc_udbg.c
@@ -0,0 +1,96 @@
+/*
+ * udbg interface to hvc_console.c
+ *
+ * (C) Copyright David Gibson, IBM Corporation 2008.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/console.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/irq.h>
+
+#include <asm/udbg.h>
+
+#include "hvc_console.h"
+
+struct hvc_struct *hvc_udbg_dev;
+
+static int hvc_udbg_put(uint32_t vtermno, const char *buf, int count)
+{
+ int i;
+
+ for (i = 0; i < count; i++)
+ udbg_putc(buf[i]);
+
+ return i;
+}
+
+static int hvc_udbg_get(uint32_t vtermno, char *buf, int count)
+{
+ int i, c;
+
+ if (!udbg_getc_poll)
+ return 0;
+
+ for (i = 0; i < count; i++) {
+ if ((c = udbg_getc_poll()) == -1)
+ break;
+ buf[i] = c;
+ }
+
+ return i;
+}
+
+static struct hv_ops hvc_udbg_ops = {
+ .get_chars = hvc_udbg_get,
+ .put_chars = hvc_udbg_put,
+};
+
+static int __init hvc_udbg_init(void)
+{
+ struct hvc_struct *hp;
+
+ BUG_ON(hvc_udbg_dev);
+
+ hp = hvc_alloc(0, NO_IRQ, &hvc_udbg_ops, 16);
+ if (IS_ERR(hp))
+ return PTR_ERR(hp);
+
+ hvc_udbg_dev = hp;
+
+ return 0;
+}
+module_init(hvc_udbg_init);
+
+static void __exit hvc_udbg_exit(void)
+{
+ if (hvc_udbg_dev)
+ hvc_remove(hvc_udbg_dev);
+}
+module_exit(hvc_udbg_exit);
+
+static int __init hvc_udbg_console_init(void)
+{
+ hvc_instantiate(0, 0, &hvc_udbg_ops);
+ add_preferred_console("hvc", 0, NULL);
+
+ return 0;
+}
+console_initcall(hvc_udbg_console_init);
diff --git a/drivers/char/hvc_vio.c b/drivers/char/hvc_vio.c
index 019e0b58593..bd62dc86b47 100644
--- a/drivers/char/hvc_vio.c
+++ b/drivers/char/hvc_vio.c
@@ -153,8 +153,10 @@ static int hvc_find_vtys(void)
/* We have statically defined space for only a certain number
* of console adapters.
*/
- if (num_found >= MAX_NR_HVC_CONSOLES)
+ if (num_found >= MAX_NR_HVC_CONSOLES) {
+ of_node_put(vty);
break;
+ }
vtermno = of_get_property(vty, "reg", NULL);
if (!vtermno)
diff --git a/drivers/char/hvcs.c b/drivers/char/hvcs.c
index 473d9b14439..6e6eb445d37 100644
--- a/drivers/char/hvcs.c
+++ b/drivers/char/hvcs.c
@@ -269,7 +269,7 @@ struct hvcs_struct {
unsigned int index;
struct tty_struct *tty;
- unsigned int open_count;
+ int open_count;
/*
* Used to tell the driver kernel_thread what operations need to take
diff --git a/drivers/char/hvsi.c b/drivers/char/hvsi.c
index 59c6f9ab94e..af055287271 100644
--- a/drivers/char/hvsi.c
+++ b/drivers/char/hvsi.c
@@ -75,7 +75,7 @@ struct hvsi_struct {
spinlock_t lock;
int index;
struct tty_struct *tty;
- unsigned int count;
+ int count;
uint8_t throttle_buf[128];
uint8_t outbuf[N_OUTBUF]; /* to implement write_room and chars_in_buffer */
/* inbuf is for packet reassembly. leave a little room for leftovers. */
diff --git a/drivers/char/nvram.c b/drivers/char/nvram.c
index 8054ee839b3..88cee4099be 100644
--- a/drivers/char/nvram.c
+++ b/drivers/char/nvram.c
@@ -32,9 +32,10 @@
* added changelog
* 1.2 Erik Gilling: Cobalt Networks support
* Tim Hockin: general cleanup, Cobalt support
+ * 1.3 Wim Van Sebroeck: convert PRINT_PROC to seq_file
*/
-#define NVRAM_VERSION "1.2"
+#define NVRAM_VERSION "1.3"
#include <linux/module.h>
#include <linux/smp_lock.h>
@@ -46,7 +47,7 @@
/* select machine configuration */
#if defined(CONFIG_ATARI)
# define MACH ATARI
-#elif defined(__i386__) || defined(__x86_64__) || defined(__arm__) /* and others?? */
+#elif defined(__i386__) || defined(__x86_64__) || defined(__arm__) /* and ?? */
# define MACH PC
#else
# error Cannot build nvram driver for this machine configuration.
@@ -106,10 +107,11 @@
#include <linux/mc146818rtc.h>
#include <linux/init.h>
#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
#include <linux/spinlock.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
#include <asm/system.h>
static DEFINE_SPINLOCK(nvram_state_lock);
@@ -122,8 +124,8 @@ static int mach_check_checksum(void);
static void mach_set_checksum(void);
#ifdef CONFIG_PROC_FS
-static int mach_proc_infos(unsigned char *contents, char *buffer, int *len,
- off_t *begin, off_t offset, int size);
+static void mach_proc_infos(unsigned char *contents, struct seq_file *seq,
+ void *offset);
#endif
/*
@@ -133,18 +135,17 @@ static int mach_proc_infos(unsigned char *contents, char *buffer, int *len,
*
* It is worth noting that these functions all access bytes of general
* purpose memory in the NVRAM - that is to say, they all add the
- * NVRAM_FIRST_BYTE offset. Pass them offsets into NVRAM as if you did not
+ * NVRAM_FIRST_BYTE offset. Pass them offsets into NVRAM as if you did not
* know about the RTC cruft.
*/
-unsigned char
-__nvram_read_byte(int i)
+unsigned char __nvram_read_byte(int i)
{
return CMOS_READ(NVRAM_FIRST_BYTE + i);
}
+EXPORT_SYMBOL(__nvram_read_byte);
-unsigned char
-nvram_read_byte(int i)
+unsigned char nvram_read_byte(int i)
{
unsigned long flags;
unsigned char c;
@@ -154,16 +155,16 @@ nvram_read_byte(int i)
spin_unlock_irqrestore(&rtc_lock, flags);
return c;
}
+EXPORT_SYMBOL(nvram_read_byte);
/* This races nicely with trying to read with checksum checking (nvram_read) */
-void
-__nvram_write_byte(unsigned char c, int i)
+void __nvram_write_byte(unsigned char c, int i)
{
CMOS_WRITE(c, NVRAM_FIRST_BYTE + i);
}
+EXPORT_SYMBOL(__nvram_write_byte);
-void
-nvram_write_byte(unsigned char c, int i)
+void nvram_write_byte(unsigned char c, int i)
{
unsigned long flags;
@@ -171,15 +172,15 @@ nvram_write_byte(unsigned char c, int i)
__nvram_write_byte(c, i);
spin_unlock_irqrestore(&rtc_lock, flags);
}
+EXPORT_SYMBOL(nvram_write_byte);
-int
-__nvram_check_checksum(void)
+int __nvram_check_checksum(void)
{
return mach_check_checksum();
}
+EXPORT_SYMBOL(__nvram_check_checksum);
-int
-nvram_check_checksum(void)
+int nvram_check_checksum(void)
{
unsigned long flags;
int rv;
@@ -189,16 +190,15 @@ nvram_check_checksum(void)
spin_unlock_irqrestore(&rtc_lock, flags);
return rv;
}
+EXPORT_SYMBOL(nvram_check_checksum);
-static void
-__nvram_set_checksum(void)
+static void __nvram_set_checksum(void)
{
mach_set_checksum();
}
#if 0
-void
-nvram_set_checksum(void)
+void nvram_set_checksum(void)
{
unsigned long flags;
@@ -212,7 +212,7 @@ nvram_set_checksum(void)
* The are the file operation function for user access to /dev/nvram
*/
-static loff_t nvram_llseek(struct file *file,loff_t offset, int origin )
+static loff_t nvram_llseek(struct file *file, loff_t offset, int origin)
{
lock_kernel();
switch (origin) {
@@ -230,8 +230,8 @@ static loff_t nvram_llseek(struct file *file,loff_t offset, int origin )
return (offset >= 0) ? (file->f_pos = offset) : -EINVAL;
}
-static ssize_t
-nvram_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
+static ssize_t nvram_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
{
unsigned char contents[NVRAM_BYTES];
unsigned i = *ppos;
@@ -254,13 +254,13 @@ nvram_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
return tmp - contents;
- checksum_err:
+checksum_err:
spin_unlock_irq(&rtc_lock);
return -EIO;
}
-static ssize_t
-nvram_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+static ssize_t nvram_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
{
unsigned char contents[NVRAM_BYTES];
unsigned i = *ppos;
@@ -287,14 +287,13 @@ nvram_write(struct file *file, const char __user *buf, size_t count, loff_t *ppo
return tmp - contents;
- checksum_err:
+checksum_err:
spin_unlock_irq(&rtc_lock);
return -EIO;
}
-static int
-nvram_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static int nvram_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
{
int i;
@@ -315,7 +314,7 @@ nvram_ioctl(struct inode *inode, struct file *file,
return 0;
case NVRAM_SETCKS:
- /* just set checksum, contents unchanged (maybe useful after
+ /* just set checksum, contents unchanged (maybe useful after
* checksum garbaged somehow...) */
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
@@ -330,8 +329,7 @@ nvram_ioctl(struct inode *inode, struct file *file,
}
}
-static int
-nvram_open(struct inode *inode, struct file *file)
+static int nvram_open(struct inode *inode, struct file *file)
{
lock_kernel();
spin_lock(&nvram_state_lock);
@@ -356,8 +354,7 @@ nvram_open(struct inode *inode, struct file *file)
return 0;
}
-static int
-nvram_release(struct inode *inode, struct file *file)
+static int nvram_release(struct inode *inode, struct file *file)
{
spin_lock(&nvram_state_lock);
@@ -375,48 +372,47 @@ nvram_release(struct inode *inode, struct file *file)
}
#ifndef CONFIG_PROC_FS
-static int
-nvram_read_proc(char *buffer, char **start, off_t offset,
- int size, int *eof, void *data)
+static int nvram_add_proc_fs(void)
{
return 0;
}
+
#else
-static int
-nvram_read_proc(char *buffer, char **start, off_t offset,
- int size, int *eof, void *data)
+static int nvram_proc_read(struct seq_file *seq, void *offset)
{
unsigned char contents[NVRAM_BYTES];
- int i, len = 0;
- off_t begin = 0;
+ int i = 0;
spin_lock_irq(&rtc_lock);
for (i = 0; i < NVRAM_BYTES; ++i)
contents[i] = __nvram_read_byte(i);
spin_unlock_irq(&rtc_lock);
- *eof = mach_proc_infos(contents, buffer, &len, &begin, offset, size);
+ mach_proc_infos(contents, seq, offset);
- if (offset >= begin + len)
- return 0;
- *start = buffer + (offset - begin);
- return (size < begin + len - offset) ? size : begin + len - offset;
+ return 0;
+}
+static int nvram_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, nvram_proc_read, NULL);
}
-/* This macro frees the machine specific function from bounds checking and
- * this like that... */
-#define PRINT_PROC(fmt,args...) \
- do { \
- *len += sprintf(buffer+*len, fmt, ##args); \
- if (*begin + *len > offset + size) \
- return 0; \
- if (*begin + *len < offset) { \
- *begin += *len; \
- *len = 0; \
- } \
- } while(0)
+static const struct file_operations nvram_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = nvram_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int nvram_add_proc_fs(void)
+{
+ if (!proc_create("driver/nvram", 0, NULL, &nvram_proc_fops))
+ return -ENOMEM;
+ return 0;
+}
#endif /* CONFIG_PROC_FS */
@@ -436,8 +432,7 @@ static struct miscdevice nvram_dev = {
&nvram_fops
};
-static int __init
-nvram_init(void)
+static int __init nvram_init(void)
{
int ret;
@@ -451,23 +446,21 @@ nvram_init(void)
NVRAM_MINOR);
goto out;
}
- if (!create_proc_read_entry("driver/nvram", 0, NULL, nvram_read_proc,
- NULL)) {
+ ret = nvram_add_proc_fs();
+ if (ret) {
printk(KERN_ERR "nvram: can't create /proc/driver/nvram\n");
- ret = -ENOMEM;
goto outmisc;
}
ret = 0;
printk(KERN_INFO "Non-volatile memory driver v" NVRAM_VERSION "\n");
- out:
+out:
return ret;
- outmisc:
+outmisc:
misc_deregister(&nvram_dev);
goto out;
}
-static void __exit
-nvram_cleanup_module(void)
+static void __exit nvram_cleanup_module(void)
{
remove_proc_entry("driver/nvram", NULL);
misc_deregister(&nvram_dev);
@@ -482,8 +475,7 @@ module_exit(nvram_cleanup_module);
#if MACH == PC
-static int
-pc_check_checksum(void)
+static int pc_check_checksum(void)
{
int i;
unsigned short sum = 0;
@@ -493,11 +485,10 @@ pc_check_checksum(void)
sum += __nvram_read_byte(i);
expect = __nvram_read_byte(PC_CKS_LOC)<<8 |
__nvram_read_byte(PC_CKS_LOC+1);
- return ((sum & 0xffff) == expect);
+ return (sum & 0xffff) == expect;
}
-static void
-pc_set_checksum(void)
+static void pc_set_checksum(void)
{
int i;
unsigned short sum = 0;
@@ -522,9 +513,8 @@ static char *gfx_types[] = {
"monochrome",
};
-static int
-pc_proc_infos(unsigned char *nvram, char *buffer, int *len,
- off_t *begin, off_t offset, int size)
+static void pc_proc_infos(unsigned char *nvram, struct seq_file *seq,
+ void *offset)
{
int checksum;
int type;
@@ -533,56 +523,57 @@ pc_proc_infos(unsigned char *nvram, char *buffer, int *len,
checksum = __nvram_check_checksum();
spin_unlock_irq(&rtc_lock);
- PRINT_PROC("Checksum status: %svalid\n", checksum ? "" : "not ");
+ seq_printf(seq, "Checksum status: %svalid\n", checksum ? "" : "not ");
- PRINT_PROC("# floppies : %d\n",
+ seq_printf(seq, "# floppies : %d\n",
(nvram[6] & 1) ? (nvram[6] >> 6) + 1 : 0);
- PRINT_PROC("Floppy 0 type : ");
+ seq_printf(seq, "Floppy 0 type : ");
type = nvram[2] >> 4;
if (type < ARRAY_SIZE(floppy_types))
- PRINT_PROC("%s\n", floppy_types[type]);
+ seq_printf(seq, "%s\n", floppy_types[type]);
else
- PRINT_PROC("%d (unknown)\n", type);
- PRINT_PROC("Floppy 1 type : ");
+ seq_printf(seq, "%d (unknown)\n", type);
+ seq_printf(seq, "Floppy 1 type : ");
type = nvram[2] & 0x0f;
if (type < ARRAY_SIZE(floppy_types))
- PRINT_PROC("%s\n", floppy_types[type]);
+ seq_printf(seq, "%s\n", floppy_types[type]);
else
- PRINT_PROC("%d (unknown)\n", type);
+ seq_printf(seq, "%d (unknown)\n", type);
- PRINT_PROC("HD 0 type : ");
+ seq_printf(seq, "HD 0 type : ");
type = nvram[4] >> 4;
if (type)
- PRINT_PROC("%02x\n", type == 0x0f ? nvram[11] : type);
+ seq_printf(seq, "%02x\n", type == 0x0f ? nvram[11] : type);
else
- PRINT_PROC("none\n");
+ seq_printf(seq, "none\n");
- PRINT_PROC("HD 1 type : ");
+ seq_printf(seq, "HD 1 type : ");
type = nvram[4] & 0x0f;
if (type)
- PRINT_PROC("%02x\n", type == 0x0f ? nvram[12] : type);
+ seq_printf(seq, "%02x\n", type == 0x0f ? nvram[12] : type);
else
- PRINT_PROC("none\n");
+ seq_printf(seq, "none\n");
- PRINT_PROC("HD type 48 data: %d/%d/%d C/H/S, precomp %d, lz %d\n",
+ seq_printf(seq, "HD type 48 data: %d/%d/%d C/H/S, precomp %d, lz %d\n",
nvram[18] | (nvram[19] << 8),
nvram[20], nvram[25],
nvram[21] | (nvram[22] << 8), nvram[23] | (nvram[24] << 8));
- PRINT_PROC("HD type 49 data: %d/%d/%d C/H/S, precomp %d, lz %d\n",
+ seq_printf(seq, "HD type 49 data: %d/%d/%d C/H/S, precomp %d, lz %d\n",
nvram[39] | (nvram[40] << 8),
nvram[41], nvram[46],
nvram[42] | (nvram[43] << 8), nvram[44] | (nvram[45] << 8));
- PRINT_PROC("DOS base memory: %d kB\n", nvram[7] | (nvram[8] << 8));
- PRINT_PROC("Extended memory: %d kB (configured), %d kB (tested)\n",
+ seq_printf(seq, "DOS base memory: %d kB\n", nvram[7] | (nvram[8] << 8));
+ seq_printf(seq, "Extended memory: %d kB (configured), %d kB (tested)\n",
nvram[9] | (nvram[10] << 8), nvram[34] | (nvram[35] << 8));
- PRINT_PROC("Gfx adapter : %s\n", gfx_types[(nvram[6] >> 4) & 3]);
+ seq_printf(seq, "Gfx adapter : %s\n",
+ gfx_types[(nvram[6] >> 4) & 3]);
- PRINT_PROC("FPU : %sinstalled\n",
+ seq_printf(seq, "FPU : %sinstalled\n",
(nvram[6] & 2) ? "" : "not ");
- return 1;
+ return;
}
#endif
@@ -590,20 +581,18 @@ pc_proc_infos(unsigned char *nvram, char *buffer, int *len,
#if MACH == ATARI
-static int
-atari_check_checksum(void)
+static int atari_check_checksum(void)
{
int i;
unsigned char sum = 0;
for (i = ATARI_CKS_RANGE_START; i <= ATARI_CKS_RANGE_END; ++i)
sum += __nvram_read_byte(i);
- return (__nvram_read_byte(ATARI_CKS_LOC) == (~sum & 0xff) &&
- __nvram_read_byte(ATARI_CKS_LOC + 1) == (sum & 0xff));
+ return (__nvram_read_byte(ATARI_CKS_LOC) == (~sum & 0xff)) &&
+ (__nvram_read_byte(ATARI_CKS_LOC + 1) == (sum & 0xff));
}
-static void
-atari_set_checksum(void)
+static void atari_set_checksum(void)
{
int i;
unsigned char sum = 0;
@@ -654,82 +643,75 @@ static char *colors[] = {
"2", "4", "16", "256", "65536", "??", "??", "??"
};
-static int
-atari_proc_infos(unsigned char *nvram, char *buffer, int *len,
- off_t *begin, off_t offset, int size)
+static void atari_proc_infos(unsigned char *nvram, struct seq_file *seq,
+ void *offset)
{
int checksum = nvram_check_checksum();
int i;
unsigned vmode;
- PRINT_PROC("Checksum status : %svalid\n", checksum ? "" : "not ");
+ seq_printf(seq, "Checksum status : %svalid\n", checksum ? "" : "not ");
- PRINT_PROC("Boot preference : ");
+ seq_printf(seq, "Boot preference : ");
for (i = ARRAY_SIZE(boot_prefs) - 1; i >= 0; --i) {
if (nvram[1] == boot_prefs[i].val) {
- PRINT_PROC("%s\n", boot_prefs[i].name);
+ seq_printf(seq, "%s\n", boot_prefs[i].name);
break;
}
}
if (i < 0)
- PRINT_PROC("0x%02x (undefined)\n", nvram[1]);
+ seq_printf(seq, "0x%02x (undefined)\n", nvram[1]);
- PRINT_PROC("SCSI arbitration : %s\n",
+ seq_printf(seq, "SCSI arbitration : %s\n",
(nvram[16] & 0x80) ? "on" : "off");
- PRINT_PROC("SCSI host ID : ");
+ seq_printf(seq, "SCSI host ID : ");
if (nvram[16] & 0x80)
- PRINT_PROC("%d\n", nvram[16] & 7);
+ seq_printf(seq, "%d\n", nvram[16] & 7);
else
- PRINT_PROC("n/a\n");
+ seq_printf(seq, "n/a\n");
/* the following entries are defined only for the Falcon */
if ((atari_mch_cookie >> 16) != ATARI_MCH_FALCON)
- return 1;
+ return;
- PRINT_PROC("OS language : ");
+ seq_printf(seq, "OS language : ");
if (nvram[6] < ARRAY_SIZE(languages))
- PRINT_PROC("%s\n", languages[nvram[6]]);
+ seq_printf(seq, "%s\n", languages[nvram[6]]);
else
- PRINT_PROC("%u (undefined)\n", nvram[6]);
- PRINT_PROC("Keyboard language: ");
+ seq_printf(seq, "%u (undefined)\n", nvram[6]);
+ seq_printf(seq, "Keyboard language: ");
if (nvram[7] < ARRAY_SIZE(languages))
- PRINT_PROC("%s\n", languages[nvram[7]]);
+ seq_printf(seq, "%s\n", languages[nvram[7]]);
else
- PRINT_PROC("%u (undefined)\n", nvram[7]);
- PRINT_PROC("Date format : ");
- PRINT_PROC(dateformat[nvram[8] & 7],
+ seq_printf(seq, "%u (undefined)\n", nvram[7]);
+ seq_printf(seq, "Date format : ");
+ seq_printf(seq, dateformat[nvram[8] & 7],
nvram[9] ? nvram[9] : '/', nvram[9] ? nvram[9] : '/');
- PRINT_PROC(", %dh clock\n", nvram[8] & 16 ? 24 : 12);
- PRINT_PROC("Boot delay : ");
+ seq_printf(seq, ", %dh clock\n", nvram[8] & 16 ? 24 : 12);
+ seq_printf(seq, "Boot delay : ");
if (nvram[10] == 0)
- PRINT_PROC("default");
+ seq_printf(seq, "default");
else
- PRINT_PROC("%ds%s\n", nvram[10],
+ seq_printf(seq, "%ds%s\n", nvram[10],
nvram[10] < 8 ? ", no memory test" : "");
vmode = (nvram[14] << 8) || nvram[15];
- PRINT_PROC("Video mode : %s colors, %d columns, %s %s monitor\n",
+ seq_printf(seq,
+ "Video mode : %s colors, %d columns, %s %s monitor\n",
colors[vmode & 7],
vmode & 8 ? 80 : 40,
vmode & 16 ? "VGA" : "TV", vmode & 32 ? "PAL" : "NTSC");
- PRINT_PROC(" %soverscan, compat. mode %s%s\n",
+ seq_printf(seq, " %soverscan, compat. mode %s%s\n",
vmode & 64 ? "" : "no ",
vmode & 128 ? "on" : "off",
vmode & 256 ?
(vmode & 16 ? ", line doubling" : ", half screen") : "");
- return 1;
+ return;
}
#endif
#endif /* MACH == ATARI */
MODULE_LICENSE("GPL");
-
-EXPORT_SYMBOL(__nvram_read_byte);
-EXPORT_SYMBOL(nvram_read_byte);
-EXPORT_SYMBOL(__nvram_write_byte);
-EXPORT_SYMBOL(nvram_write_byte);
-EXPORT_SYMBOL(__nvram_check_checksum);
-EXPORT_SYMBOL(nvram_check_checksum);
MODULE_ALIAS_MISCDEV(NVRAM_MINOR);
diff --git a/drivers/char/sysrq.c b/drivers/char/sysrq.c
index ce0d9da52a8..94966edfb44 100644
--- a/drivers/char/sysrq.c
+++ b/drivers/char/sysrq.c
@@ -274,6 +274,22 @@ static struct sysrq_key_op sysrq_showstate_blocked_op = {
.enable_mask = SYSRQ_ENABLE_DUMP,
};
+#ifdef CONFIG_TRACING
+#include <linux/ftrace.h>
+
+static void sysrq_ftrace_dump(int key, struct tty_struct *tty)
+{
+ ftrace_dump();
+}
+static struct sysrq_key_op sysrq_ftrace_dump_op = {
+ .handler = sysrq_ftrace_dump,
+ .help_msg = "dumpZ-ftrace-buffer",
+ .action_msg = "Dump ftrace buffer",
+ .enable_mask = SYSRQ_ENABLE_DUMP,
+};
+#else
+#define sysrq_ftrace_dump_op (*(struct sysrq_key_op *)0)
+#endif
static void sysrq_handle_showmem(int key, struct tty_struct *tty)
{
@@ -406,7 +422,7 @@ static struct sysrq_key_op *sysrq_key_table[36] = {
NULL, /* x */
/* y: May be registered on sparc64 for global register dump */
NULL, /* y */
- NULL /* z */
+ &sysrq_ftrace_dump_op, /* z */
};
/* key2index calculation, -1 on invalid index */
diff --git a/drivers/char/tty_audit.c b/drivers/char/tty_audit.c
index 5787249934c..34ab6d798f8 100644
--- a/drivers/char/tty_audit.c
+++ b/drivers/char/tty_audit.c
@@ -67,6 +67,29 @@ static void tty_audit_buf_put(struct tty_audit_buf *buf)
tty_audit_buf_free(buf);
}
+static void tty_audit_log(const char *description, struct task_struct *tsk,
+ uid_t loginuid, unsigned sessionid, int major,
+ int minor, unsigned char *data, size_t size)
+{
+ struct audit_buffer *ab;
+
+ ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_TTY);
+ if (ab) {
+ char name[sizeof(tsk->comm)];
+ uid_t uid = task_uid(tsk);
+
+ audit_log_format(ab, "%s pid=%u uid=%u auid=%u ses=%u "
+ "major=%d minor=%d comm=", description,
+ tsk->pid, uid, loginuid, sessionid,
+ major, minor);
+ get_task_comm(name, tsk);
+ audit_log_untrustedstring(ab, name);
+ audit_log_format(ab, " data=");
+ audit_log_n_hex(ab, data, size);
+ audit_log_end(ab);
+ }
+}
+
/**
* tty_audit_buf_push - Push buffered data out
*
@@ -77,25 +100,12 @@ static void tty_audit_buf_push(struct task_struct *tsk, uid_t loginuid,
unsigned int sessionid,
struct tty_audit_buf *buf)
{
- struct audit_buffer *ab;
-
if (buf->valid == 0)
return;
if (audit_enabled == 0)
return;
- ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_TTY);
- if (ab) {
- char name[sizeof(tsk->comm)];
-
- audit_log_format(ab, "tty pid=%u uid=%u auid=%u ses=%u "
- "major=%d minor=%d comm=", tsk->pid, tsk->uid,
- loginuid, sessionid, buf->major, buf->minor);
- get_task_comm(name, tsk);
- audit_log_untrustedstring(ab, name);
- audit_log_format(ab, " data=");
- audit_log_n_hex(ab, buf->data, buf->valid);
- audit_log_end(ab);
- }
+ tty_audit_log("tty", tsk, loginuid, sessionid, buf->major, buf->minor,
+ buf->data, buf->valid);
buf->valid = 0;
}
@@ -150,6 +160,42 @@ void tty_audit_fork(struct signal_struct *sig)
}
/**
+ * tty_audit_tiocsti - Log TIOCSTI
+ */
+void tty_audit_tiocsti(struct tty_struct *tty, char ch)
+{
+ struct tty_audit_buf *buf;
+ int major, minor, should_audit;
+
+ spin_lock_irq(&current->sighand->siglock);
+ should_audit = current->signal->audit_tty;
+ buf = current->signal->tty_audit_buf;
+ if (buf)
+ atomic_inc(&buf->count);
+ spin_unlock_irq(&current->sighand->siglock);
+
+ major = tty->driver->major;
+ minor = tty->driver->minor_start + tty->index;
+ if (buf) {
+ mutex_lock(&buf->mutex);
+ if (buf->major == major && buf->minor == minor)
+ tty_audit_buf_push_current(buf);
+ mutex_unlock(&buf->mutex);
+ tty_audit_buf_put(buf);
+ }
+
+ if (should_audit && audit_enabled) {
+ uid_t auid;
+ unsigned int sessionid;
+
+ auid = audit_get_loginuid(current);
+ sessionid = audit_get_sessionid(current);
+ tty_audit_log("ioctl=TIOCSTI", current, auid, sessionid, major,
+ minor, &ch, 1);
+ }
+}
+
+/**
* tty_audit_push_task - Flush task's pending audit data
*/
void tty_audit_push_task(struct task_struct *tsk, uid_t loginuid, u32 sessionid)
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 1412a8d1e58..db15f9ba7c0 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -2018,6 +2018,7 @@ static int tiocsti(struct tty_struct *tty, char __user *p)
return -EPERM;
if (get_user(ch, p))
return -EFAULT;
+ tty_audit_tiocsti(tty, ch);
ld = tty_ldisc_ref_wait(tty);
ld->ops->receive_buf(tty, &ch, &mbz, 1);
tty_ldisc_deref(ld);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-24 00:08:00 +0000