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-rw-r--r--arch/um/drivers/harddog_kern.c2
-rw-r--r--arch/um/drivers/hostaudio_kern.c2
-rw-r--r--arch/um/drivers/mconsole_kern.c2
-rw-r--r--arch/um/drivers/mmapper_kern.c2
-rw-r--r--arch/um/drivers/net_kern.c8
-rw-r--r--arch/um/drivers/random.c2
-rw-r--r--arch/um/drivers/ubd.h5
-rw-r--r--arch/um/drivers/ubd_kern.c168
-rw-r--r--arch/um/drivers/ubd_user.c21
9 files changed, 172 insertions, 40 deletions
diff --git a/arch/um/drivers/harddog_kern.c b/arch/um/drivers/harddog_kern.c
index 3282787bbcfb..6d381279b362 100644
--- a/arch/um/drivers/harddog_kern.c
+++ b/arch/um/drivers/harddog_kern.c
@@ -45,7 +45,7 @@
#include <linux/mutex.h>
#include <linux/init.h>
#include <linux/spinlock.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include "mconsole.h"
MODULE_LICENSE("GPL");
diff --git a/arch/um/drivers/hostaudio_kern.c b/arch/um/drivers/hostaudio_kern.c
index 3a4b58730f5f..12bdb5996bf5 100644
--- a/arch/um/drivers/hostaudio_kern.c
+++ b/arch/um/drivers/hostaudio_kern.c
@@ -9,7 +9,7 @@
#include <linux/sound.h>
#include <linux/soundcard.h>
#include <linux/mutex.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include <init.h>
#include <os.h>
diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c
index 8a6b57108ac2..8a4c72af3bc0 100644
--- a/arch/um/drivers/mconsole_kern.c
+++ b/arch/um/drivers/mconsole_kern.c
@@ -24,7 +24,7 @@
#include <linux/fs.h>
#include <linux/mount.h>
#include <linux/file.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include <asm/switch_to.h>
#include <init.h>
diff --git a/arch/um/drivers/mmapper_kern.c b/arch/um/drivers/mmapper_kern.c
index 62145c276167..3645fcb2a787 100644
--- a/arch/um/drivers/mmapper_kern.c
+++ b/arch/um/drivers/mmapper_kern.c
@@ -17,7 +17,7 @@
#include <linux/module.h>
#include <linux/mm.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include <mem_user.h>
/* These are set in mmapper_init, which is called at boot time */
diff --git a/arch/um/drivers/net_kern.c b/arch/um/drivers/net_kern.c
index 2cd5b6874c7b..1669240c7a25 100644
--- a/arch/um/drivers/net_kern.c
+++ b/arch/um/drivers/net_kern.c
@@ -256,13 +256,6 @@ static void uml_net_tx_timeout(struct net_device *dev)
netif_wake_queue(dev);
}
-static int uml_net_change_mtu(struct net_device *dev, int new_mtu)
-{
- dev->mtu = new_mtu;
-
- return 0;
-}
-
#ifdef CONFIG_NET_POLL_CONTROLLER
static void uml_net_poll_controller(struct net_device *dev)
{
@@ -374,7 +367,6 @@ static const struct net_device_ops uml_netdev_ops = {
.ndo_set_rx_mode = uml_net_set_multicast_list,
.ndo_tx_timeout = uml_net_tx_timeout,
.ndo_set_mac_address = eth_mac_addr,
- .ndo_change_mtu = uml_net_change_mtu,
.ndo_validate_addr = eth_validate_addr,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = uml_net_poll_controller,
diff --git a/arch/um/drivers/random.c b/arch/um/drivers/random.c
index dd16c902ff70..05523f14d7b2 100644
--- a/arch/um/drivers/random.c
+++ b/arch/um/drivers/random.c
@@ -12,7 +12,7 @@
#include <linux/interrupt.h>
#include <linux/miscdevice.h>
#include <linux/delay.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include <irq_kern.h>
#include <os.h>
diff --git a/arch/um/drivers/ubd.h b/arch/um/drivers/ubd.h
index 3b48cd2081ee..cc1cc85f5afc 100644
--- a/arch/um/drivers/ubd.h
+++ b/arch/um/drivers/ubd.h
@@ -11,5 +11,10 @@ extern int start_io_thread(unsigned long sp, int *fds_out);
extern int io_thread(void *arg);
extern int kernel_fd;
+extern int ubd_read_poll(int timeout);
+extern int ubd_write_poll(int timeout);
+
+#define UBD_REQ_BUFFER_SIZE 64
+
#endif
diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index f3540270d096..85410279beab 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -1,4 +1,5 @@
/*
+ * Copyright (C) 2015-2016 Anton Ivanov (aivanov@brocade.com)
* Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
@@ -58,6 +59,17 @@ struct io_thread_req {
int error;
};
+
+static struct io_thread_req * (*irq_req_buffer)[];
+static struct io_thread_req *irq_remainder;
+static int irq_remainder_size;
+
+static struct io_thread_req * (*io_req_buffer)[];
+static struct io_thread_req *io_remainder;
+static int io_remainder_size;
+
+
+
static inline int ubd_test_bit(__u64 bit, unsigned char *data)
{
__u64 n;
@@ -442,29 +454,91 @@ static void do_ubd_request(struct request_queue * q);
static int thread_fd = -1;
static LIST_HEAD(restart);
-/* XXX - move this inside ubd_intr. */
+/* Function to read several request pointers at a time
+* handling fractional reads if (and as) needed
+*/
+
+static int bulk_req_safe_read(
+ int fd,
+ struct io_thread_req * (*request_buffer)[],
+ struct io_thread_req **remainder,
+ int *remainder_size,
+ int max_recs
+ )
+{
+ int n = 0;
+ int res = 0;
+
+ if (*remainder_size > 0) {
+ memmove(
+ (char *) request_buffer,
+ (char *) remainder, *remainder_size
+ );
+ n = *remainder_size;
+ }
+
+ res = os_read_file(
+ fd,
+ ((char *) request_buffer) + *remainder_size,
+ sizeof(struct io_thread_req *)*max_recs
+ - *remainder_size
+ );
+ if (res > 0) {
+ n += res;
+ if ((n % sizeof(struct io_thread_req *)) > 0) {
+ /*
+ * Read somehow returned not a multiple of dword
+ * theoretically possible, but never observed in the
+ * wild, so read routine must be able to handle it
+ */
+ *remainder_size = n % sizeof(struct io_thread_req *);
+ WARN(*remainder_size > 0, "UBD IPC read returned a partial result");
+ memmove(
+ remainder,
+ ((char *) request_buffer) +
+ (n/sizeof(struct io_thread_req *))*sizeof(struct io_thread_req *),
+ *remainder_size
+ );
+ n = n - *remainder_size;
+ }
+ } else {
+ n = res;
+ }
+ return n;
+}
+
/* Called without dev->lock held, and only in interrupt context. */
static void ubd_handler(void)
{
- struct io_thread_req *req;
struct ubd *ubd;
struct list_head *list, *next_ele;
unsigned long flags;
int n;
+ int count;
while(1){
- n = os_read_file(thread_fd, &req,
- sizeof(struct io_thread_req *));
- if(n != sizeof(req)){
+ n = bulk_req_safe_read(
+ thread_fd,
+ irq_req_buffer,
+ &irq_remainder,
+ &irq_remainder_size,
+ UBD_REQ_BUFFER_SIZE
+ );
+ if (n < 0) {
if(n == -EAGAIN)
break;
printk(KERN_ERR "spurious interrupt in ubd_handler, "
"err = %d\n", -n);
return;
}
-
- blk_end_request(req->req, 0, req->length);
- kfree(req);
+ for (count = 0; count < n/sizeof(struct io_thread_req *); count++) {
+ blk_end_request(
+ (*irq_req_buffer)[count]->req,
+ 0,
+ (*irq_req_buffer)[count]->length
+ );
+ kfree((*irq_req_buffer)[count]);
+ }
}
reactivate_fd(thread_fd, UBD_IRQ);
@@ -1064,6 +1138,28 @@ static int __init ubd_init(void)
if (register_blkdev(fake_major, "ubd"))
return -1;
}
+
+ irq_req_buffer = kmalloc(
+ sizeof(struct io_thread_req *) * UBD_REQ_BUFFER_SIZE,
+ GFP_KERNEL
+ );
+ irq_remainder = 0;
+
+ if (irq_req_buffer == NULL) {
+ printk(KERN_ERR "Failed to initialize ubd buffering\n");
+ return -1;
+ }
+ io_req_buffer = kmalloc(
+ sizeof(struct io_thread_req *) * UBD_REQ_BUFFER_SIZE,
+ GFP_KERNEL
+ );
+
+ io_remainder = 0;
+
+ if (io_req_buffer == NULL) {
+ printk(KERN_ERR "Failed to initialize ubd buffering\n");
+ return -1;
+ }
platform_driver_register(&ubd_driver);
mutex_lock(&ubd_lock);
for (i = 0; i < MAX_DEV; i++){
@@ -1458,31 +1554,51 @@ static int io_count = 0;
int io_thread(void *arg)
{
- struct io_thread_req *req;
- int n;
+ int n, count, written, res;
os_fix_helper_signals();
while(1){
- n = os_read_file(kernel_fd, &req,
- sizeof(struct io_thread_req *));
- if(n != sizeof(struct io_thread_req *)){
- if(n < 0)
+ n = bulk_req_safe_read(
+ kernel_fd,
+ io_req_buffer,
+ &io_remainder,
+ &io_remainder_size,
+ UBD_REQ_BUFFER_SIZE
+ );
+ if (n < 0) {
+ if (n == -EAGAIN) {
+ ubd_read_poll(-1);
+ continue;
+ } else {
printk("io_thread - read failed, fd = %d, "
- "err = %d\n", kernel_fd, -n);
- else {
- printk("io_thread - short read, fd = %d, "
- "length = %d\n", kernel_fd, n);
+ "err = %d,"
+ "reminder = %d\n",
+ kernel_fd, -n, io_remainder_size);
}
- continue;
}
- io_count++;
- do_io(req);
- n = os_write_file(kernel_fd, &req,
- sizeof(struct io_thread_req *));
- if(n != sizeof(struct io_thread_req *))
- printk("io_thread - write failed, fd = %d, err = %d\n",
- kernel_fd, -n);
+
+ for (count = 0; count < n/sizeof(struct io_thread_req *); count++) {
+ io_count++;
+ do_io((*io_req_buffer)[count]);
+ }
+
+ written = 0;
+
+ do {
+ res = os_write_file(kernel_fd, ((char *) io_req_buffer) + written, n);
+ if (res > 0) {
+ written += res;
+ } else {
+ if (res != -EAGAIN) {
+ printk("io_thread - read failed, fd = %d, "
+ "err = %d\n", kernel_fd, -n);
+ }
+ }
+ if (written < n) {
+ ubd_write_poll(-1);
+ }
+ } while (written < n);
}
return 0;
diff --git a/arch/um/drivers/ubd_user.c b/arch/um/drivers/ubd_user.c
index e376f9b9c68d..6f744794d141 100644
--- a/arch/um/drivers/ubd_user.c
+++ b/arch/um/drivers/ubd_user.c
@@ -1,4 +1,5 @@
-/*
+/*
+ * Copyright (C) 2016 Anton Ivanov (aivanov@brocade.com)
* Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
* Copyright (C) 2001 Ridgerun,Inc (glonnon@ridgerun.com)
* Licensed under the GPL
@@ -20,6 +21,9 @@
#include "ubd.h"
#include <os.h>
+#include <poll.h>
+
+struct pollfd kernel_pollfd;
int start_io_thread(unsigned long sp, int *fd_out)
{
@@ -32,9 +36,12 @@ int start_io_thread(unsigned long sp, int *fd_out)
}
kernel_fd = fds[0];
+ kernel_pollfd.fd = kernel_fd;
+ kernel_pollfd.events = POLLIN;
*fd_out = fds[1];
err = os_set_fd_block(*fd_out, 0);
+ err = os_set_fd_block(kernel_fd, 0);
if (err) {
printk("start_io_thread - failed to set nonblocking I/O.\n");
goto out_close;
@@ -57,3 +64,15 @@ int start_io_thread(unsigned long sp, int *fd_out)
out:
return err;
}
+
+int ubd_read_poll(int timeout)
+{
+ kernel_pollfd.events = POLLIN;
+ return poll(&kernel_pollfd, 1, timeout);
+}
+int ubd_write_poll(int timeout)
+{
+ kernel_pollfd.events = POLLOUT;
+ return poll(&kernel_pollfd, 1, timeout);
+}
+
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2025-02-01 23:54:17 +0100