parent
3fa43f54a2
commit
a1624421ae
@ -1,6 +1,6 @@
|
||||
--- a/lib/Kconfig
|
||||
+++ b/lib/Kconfig
|
||||
@@ -161,16 +161,16 @@ config REED_SOLOMON_DEC16
|
||||
@@ -152,16 +152,16 @@ config REED_SOLOMON_DEC16
|
||||
# Textsearch support is select'ed if needed
|
||||
#
|
||||
config TEXTSEARCH
|
@ -0,0 +1,292 @@
|
||||
--- a/drivers/mtd/devices/block2mtd.c
|
||||
+++ b/drivers/mtd/devices/block2mtd.c
|
||||
@@ -30,6 +30,8 @@ struct block2mtd_dev {
|
||||
struct block_device *blkdev;
|
||||
struct mtd_info mtd;
|
||||
struct mutex write_mutex;
|
||||
+ rwlock_t bdev_mutex;
|
||||
+ char devname[0];
|
||||
};
|
||||
|
||||
|
||||
@@ -82,6 +84,12 @@ static int block2mtd_erase(struct mtd_in
|
||||
size_t len = instr->len;
|
||||
int err;
|
||||
|
||||
+ read_lock(&dev->bdev_mutex);
|
||||
+ if (!dev->blkdev) {
|
||||
+ err = -EINVAL;
|
||||
+ goto done;
|
||||
+ }
|
||||
+
|
||||
instr->state = MTD_ERASING;
|
||||
mutex_lock(&dev->write_mutex);
|
||||
err = _block2mtd_erase(dev, from, len);
|
||||
@@ -93,6 +101,10 @@ static int block2mtd_erase(struct mtd_in
|
||||
instr->state = MTD_ERASE_DONE;
|
||||
|
||||
mtd_erase_callback(instr);
|
||||
+
|
||||
+done:
|
||||
+ read_unlock(&dev->bdev_mutex);
|
||||
+
|
||||
return err;
|
||||
}
|
||||
|
||||
@@ -104,10 +116,14 @@ static int block2mtd_read(struct mtd_inf
|
||||
struct page *page;
|
||||
int index = from >> PAGE_SHIFT;
|
||||
int offset = from & (PAGE_SIZE-1);
|
||||
- int cpylen;
|
||||
+ int cpylen, err = 0;
|
||||
+
|
||||
+ read_lock(&dev->bdev_mutex);
|
||||
+ if (!dev->blkdev || (from > mtd->size)) {
|
||||
+ err = -EINVAL;
|
||||
+ goto done;
|
||||
+ }
|
||||
|
||||
- if (from > mtd->size)
|
||||
- return -EINVAL;
|
||||
if (from + len > mtd->size)
|
||||
len = mtd->size - from;
|
||||
|
||||
@@ -122,10 +138,14 @@ static int block2mtd_read(struct mtd_inf
|
||||
len = len - cpylen;
|
||||
|
||||
page = page_read(dev->blkdev->bd_inode->i_mapping, index);
|
||||
- if (!page)
|
||||
- return -ENOMEM;
|
||||
- if (IS_ERR(page))
|
||||
- return PTR_ERR(page);
|
||||
+ if (!page) {
|
||||
+ err = -ENOMEM;
|
||||
+ goto done;
|
||||
+ }
|
||||
+ if (IS_ERR(page)) {
|
||||
+ err = PTR_ERR(page);
|
||||
+ goto done;
|
||||
+ }
|
||||
|
||||
memcpy(buf, page_address(page) + offset, cpylen);
|
||||
page_cache_release(page);
|
||||
@@ -136,7 +156,10 @@ static int block2mtd_read(struct mtd_inf
|
||||
offset = 0;
|
||||
index++;
|
||||
}
|
||||
- return 0;
|
||||
+
|
||||
+done:
|
||||
+ read_unlock(&dev->bdev_mutex);
|
||||
+ return err;
|
||||
}
|
||||
|
||||
|
||||
@@ -188,12 +211,22 @@ static int block2mtd_write(struct mtd_in
|
||||
size_t *retlen, const u_char *buf)
|
||||
{
|
||||
struct block2mtd_dev *dev = mtd->priv;
|
||||
- int err;
|
||||
+ int err = 0;
|
||||
+
|
||||
+ read_lock(&dev->bdev_mutex);
|
||||
+ if (!dev->blkdev) {
|
||||
+ err = -EINVAL;
|
||||
+ goto done;
|
||||
+ }
|
||||
|
||||
if (!len)
|
||||
- return 0;
|
||||
- if (to >= mtd->size)
|
||||
- return -ENOSPC;
|
||||
+ goto done;
|
||||
+
|
||||
+ if (to >= mtd->size) {
|
||||
+ err = -ENOSPC;
|
||||
+ goto done;
|
||||
+ }
|
||||
+
|
||||
if (to + len > mtd->size)
|
||||
len = mtd->size - to;
|
||||
|
||||
@@ -202,6 +235,9 @@ static int block2mtd_write(struct mtd_in
|
||||
mutex_unlock(&dev->write_mutex);
|
||||
if (err > 0)
|
||||
err = 0;
|
||||
+
|
||||
+done:
|
||||
+ read_unlock(&dev->bdev_mutex);
|
||||
return err;
|
||||
}
|
||||
|
||||
@@ -210,52 +246,29 @@ static int block2mtd_write(struct mtd_in
|
||||
static void block2mtd_sync(struct mtd_info *mtd)
|
||||
{
|
||||
struct block2mtd_dev *dev = mtd->priv;
|
||||
- sync_blockdev(dev->blkdev);
|
||||
- return;
|
||||
-}
|
||||
-
|
||||
-
|
||||
-static void block2mtd_free_device(struct block2mtd_dev *dev)
|
||||
-{
|
||||
- if (!dev)
|
||||
- return;
|
||||
-
|
||||
- kfree(dev->mtd.name);
|
||||
|
||||
- if (dev->blkdev) {
|
||||
- invalidate_mapping_pages(dev->blkdev->bd_inode->i_mapping,
|
||||
- 0, -1);
|
||||
- close_bdev_exclusive(dev->blkdev, FMODE_READ|FMODE_WRITE);
|
||||
- }
|
||||
+ read_lock(&dev->bdev_mutex);
|
||||
+ if (dev->blkdev)
|
||||
+ sync_blockdev(dev->blkdev);
|
||||
+ read_unlock(&dev->bdev_mutex);
|
||||
|
||||
- kfree(dev);
|
||||
+ return;
|
||||
}
|
||||
|
||||
|
||||
-/* FIXME: ensure that mtd->size % erase_size == 0 */
|
||||
-static struct block2mtd_dev *add_device(char *devname, int erase_size, const char *mtdname)
|
||||
+static int _open_bdev(struct block2mtd_dev *dev)
|
||||
{
|
||||
struct block_device *bdev;
|
||||
- struct block2mtd_dev *dev;
|
||||
- struct mtd_partition *part;
|
||||
- char *name;
|
||||
-
|
||||
- if (!devname)
|
||||
- return NULL;
|
||||
-
|
||||
- dev = kzalloc(sizeof(struct block2mtd_dev), GFP_KERNEL);
|
||||
- if (!dev)
|
||||
- return NULL;
|
||||
|
||||
/* Get a handle on the device */
|
||||
- bdev = open_bdev_exclusive(devname, FMODE_READ|FMODE_WRITE, NULL);
|
||||
+ bdev = open_bdev_exclusive(dev->devname, FMODE_READ|FMODE_WRITE, NULL);
|
||||
#ifndef MODULE
|
||||
if (IS_ERR(bdev)) {
|
||||
|
||||
/* We might not have rootfs mounted at this point. Try
|
||||
to resolve the device name by other means. */
|
||||
|
||||
- dev_t devt = name_to_dev_t(devname);
|
||||
+ dev_t devt = name_to_dev_t(dev->devname);
|
||||
if (devt) {
|
||||
bdev = open_by_devnum(devt, FMODE_WRITE | FMODE_READ);
|
||||
}
|
||||
@@ -263,17 +276,98 @@ static struct block2mtd_dev *add_device(
|
||||
#endif
|
||||
|
||||
if (IS_ERR(bdev)) {
|
||||
- ERROR("error: cannot open device %s", devname);
|
||||
- goto devinit_err;
|
||||
+ ERROR("error: cannot open device %s", dev->devname);
|
||||
+ return 1;
|
||||
}
|
||||
dev->blkdev = bdev;
|
||||
|
||||
if (MAJOR(bdev->bd_dev) == MTD_BLOCK_MAJOR) {
|
||||
ERROR("attempting to use an MTD device as a block device");
|
||||
- goto devinit_err;
|
||||
+ return 1;
|
||||
}
|
||||
|
||||
+ return 0;
|
||||
+}
|
||||
+
|
||||
+static void _close_bdev(struct block2mtd_dev *dev)
|
||||
+{
|
||||
+ struct block_device *bdev;
|
||||
+
|
||||
+ if (!dev->blkdev)
|
||||
+ return;
|
||||
+
|
||||
+ bdev = dev->blkdev;
|
||||
+ invalidate_mapping_pages(dev->blkdev->bd_inode->i_mapping, 0, -1);
|
||||
+ close_bdev_exclusive(dev->blkdev, FMODE_READ|FMODE_WRITE);
|
||||
+ dev->blkdev = NULL;
|
||||
+}
|
||||
+
|
||||
+static void block2mtd_free_device(struct block2mtd_dev *dev)
|
||||
+{
|
||||
+ if (!dev)
|
||||
+ return;
|
||||
+
|
||||
+ kfree(dev->mtd.name);
|
||||
+ _close_bdev(dev);
|
||||
+ kfree(dev);
|
||||
+}
|
||||
+
|
||||
+
|
||||
+static int block2mtd_refresh(struct mtd_info *mtd)
|
||||
+{
|
||||
+ struct block2mtd_dev *dev = mtd->priv;
|
||||
+ struct block_device *bdev;
|
||||
+ dev_t devt;
|
||||
+ int err = 0;
|
||||
+
|
||||
+ /* no other mtd function can run at this point */
|
||||
+ write_lock(&dev->bdev_mutex);
|
||||
+
|
||||
+ /* get the device number for the whole disk */
|
||||
+ devt = MKDEV(MAJOR(dev->blkdev->bd_dev), 0);
|
||||
+
|
||||
+ /* close the old block device */
|
||||
+ _close_bdev(dev);
|
||||
+
|
||||
+ /* open the whole disk, issue a partition rescan, then */
|
||||
+ bdev = open_by_devnum(devt, FMODE_WRITE | FMODE_READ);
|
||||
+ if (!bdev || !bdev->bd_disk)
|
||||
+ err = -EINVAL;
|
||||
+#ifndef CONFIG_MTD_BLOCK2MTD_MODULE
|
||||
+ else
|
||||
+ err = rescan_partitions(bdev->bd_disk, bdev);
|
||||
+#endif
|
||||
+ if (bdev)
|
||||
+ close_bdev_exclusive(bdev, FMODE_READ|FMODE_WRITE);
|
||||
+
|
||||
+ /* try to open the partition block device again */
|
||||
+ _open_bdev(dev);
|
||||
+ write_unlock(&dev->bdev_mutex);
|
||||
+
|
||||
+ return err;
|
||||
+}
|
||||
+
|
||||
+/* FIXME: ensure that mtd->size % erase_size == 0 */
|
||||
+static struct block2mtd_dev *add_device(char *devname, int erase_size, char *mtdname)
|
||||
+{
|
||||
+ struct block2mtd_dev *dev;
|
||||
+ struct mtd_partition *part;
|
||||
+ char *name;
|
||||
+
|
||||
+ if (!devname)
|
||||
+ return NULL;
|
||||
+
|
||||
+ dev = kzalloc(sizeof(struct block2mtd_dev) + strlen(devname) + 1, GFP_KERNEL);
|
||||
+ if (!dev)
|
||||
+ return NULL;
|
||||
+
|
||||
+ strcpy(dev->devname, devname);
|
||||
+
|
||||
+ if (_open_bdev(dev))
|
||||
+ goto devinit_err;
|
||||
+
|
||||
mutex_init(&dev->write_mutex);
|
||||
+ rwlock_init(&dev->bdev_mutex);
|
||||
|
||||
/* Setup the MTD structure */
|
||||
/* make the name contain the block device in */
|
||||
@@ -298,6 +392,7 @@ static struct block2mtd_dev *add_device(
|
||||
dev->mtd.read = block2mtd_read;
|
||||
dev->mtd.priv = dev;
|
||||
dev->mtd.owner = THIS_MODULE;
|
||||
+ dev->mtd.refresh_device = block2mtd_refresh;
|
||||
|
||||
part = kzalloc(sizeof(struct mtd_partition), GFP_KERNEL);
|
||||
part->name = dev->mtd.name;
|
@ -1,6 +1,6 @@
|
||||
--- a/net/netfilter/Kconfig
|
||||
+++ b/net/netfilter/Kconfig
|
||||
@@ -948,6 +948,27 @@ config NETFILTER_XT_MATCH_STATE
|
||||
@@ -946,6 +946,27 @@ config NETFILTER_XT_MATCH_STATE
|
||||
|
||||
To compile it as a module, choose M here. If unsure, say N.
|
||||
|
Some files were not shown because too many files have changed in this diff Show More
Loading…
Reference in New Issue