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-rw-r--r--fs/block_dev.c65
1 files changed, 18 insertions, 47 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c
index d878e4860fb7..afb437484362 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -75,7 +75,7 @@ void kill_bdev(struct block_device *bdev)
{
struct address_space *mapping = bdev->bd_inode->i_mapping;
- if (mapping->nrpages == 0 && mapping->nrshadows == 0)
+ if (mapping->nrpages == 0 && mapping->nrexceptional == 0)
return;
invalidate_bh_lrus();
@@ -346,9 +346,9 @@ static loff_t block_llseek(struct file *file, loff_t offset, int whence)
struct inode *bd_inode = bdev_file_inode(file);
loff_t retval;
- mutex_lock(&bd_inode->i_mutex);
+ inode_lock(bd_inode);
retval = fixed_size_llseek(file, offset, whence, i_size_read(bd_inode));
- mutex_unlock(&bd_inode->i_mutex);
+ inode_unlock(bd_inode);
return retval;
}
@@ -400,7 +400,7 @@ int bdev_read_page(struct block_device *bdev, sector_t sector,
if (!ops->rw_page || bdev_get_integrity(bdev))
return result;
- result = blk_queue_enter(bdev->bd_queue, GFP_KERNEL);
+ result = blk_queue_enter(bdev->bd_queue, false);
if (result)
return result;
result = ops->rw_page(bdev, sector + get_start_sect(bdev), page, READ);
@@ -437,7 +437,7 @@ int bdev_write_page(struct block_device *bdev, sector_t sector,
if (!ops->rw_page || bdev_get_integrity(bdev))
return -EOPNOTSUPP;
- result = blk_queue_enter(bdev->bd_queue, GFP_KERNEL);
+ result = blk_queue_enter(bdev->bd_queue, false);
if (result)
return result;
@@ -455,10 +455,7 @@ EXPORT_SYMBOL_GPL(bdev_write_page);
/**
* bdev_direct_access() - Get the address for directly-accessibly memory
* @bdev: The device containing the memory
- * @sector: The offset within the device
- * @addr: Where to put the address of the memory
- * @pfn: The Page Frame Number for the memory
- * @size: The number of bytes requested
+ * @dax: control and output parameters for ->direct_access
*
* If a block device is made up of directly addressable memory, this function
* will tell the caller the PFN and the address of the memory. The address
@@ -469,10 +466,10 @@ EXPORT_SYMBOL_GPL(bdev_write_page);
* Return: negative errno if an error occurs, otherwise the number of bytes
* accessible at this address.
*/
-long bdev_direct_access(struct block_device *bdev, sector_t sector,
- void __pmem **addr, unsigned long *pfn, long size)
+long bdev_direct_access(struct block_device *bdev, struct blk_dax_ctl *dax)
{
- long avail;
+ sector_t sector = dax->sector;
+ long avail, size = dax->size;
const struct block_device_operations *ops = bdev->bd_disk->fops;
/*
@@ -491,9 +488,11 @@ long bdev_direct_access(struct block_device *bdev, sector_t sector,
sector += get_start_sect(bdev);
if (sector % (PAGE_SIZE / 512))
return -EINVAL;
- avail = ops->direct_access(bdev, sector, addr, pfn);
+ avail = ops->direct_access(bdev, sector, &dax->addr, &dax->pfn);
if (!avail)
return -ERANGE;
+ if (avail > 0 && avail & ~PAGE_MASK)
+ return -ENXIO;
return min(avail, size);
}
EXPORT_SYMBOL_GPL(bdev_direct_access);
@@ -595,7 +594,7 @@ void __init bdev_cache_init(void)
bdev_cachep = kmem_cache_create("bdev_cache", sizeof(struct bdev_inode),
0, (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
- SLAB_MEM_SPREAD|SLAB_PANIC),
+ SLAB_MEM_SPREAD|SLAB_ACCOUNT|SLAB_PANIC),
init_once);
err = register_filesystem(&bd_type);
if (err)
@@ -701,7 +700,7 @@ static struct block_device *bd_acquire(struct inode *inode)
spin_lock(&bdev_lock);
bdev = inode->i_bdev;
if (bdev) {
- ihold(bdev->bd_inode);
+ bdgrab(bdev);
spin_unlock(&bdev_lock);
return bdev;
}
@@ -717,7 +716,7 @@ static struct block_device *bd_acquire(struct inode *inode)
* So, we can access it via ->i_mapping always
* without igrab().
*/
- ihold(bdev->bd_inode);
+ bdgrab(bdev);
inode->i_bdev = bdev;
inode->i_mapping = bdev->bd_inode->i_mapping;
list_add(&inode->i_devices, &bdev->bd_inodes);
@@ -740,7 +739,7 @@ void bd_forget(struct inode *inode)
spin_unlock(&bdev_lock);
if (bdev)
- iput(bdev->bd_inode);
+ bdput(bdev);
}
/**
@@ -1143,9 +1142,9 @@ void bd_set_size(struct block_device *bdev, loff_t size)
{
unsigned bsize = bdev_logical_block_size(bdev);
- mutex_lock(&bdev->bd_inode->i_mutex);
+ inode_lock(bdev->bd_inode);
i_size_write(bdev->bd_inode, size);
- mutex_unlock(&bdev->bd_inode->i_mutex);
+ inode_unlock(bdev->bd_inode);
while (bsize < PAGE_CACHE_SIZE) {
if (size & bsize)
break;
@@ -1737,37 +1736,13 @@ static int blkdev_dax_pmd_fault(struct vm_area_struct *vma, unsigned long addr,
return __dax_pmd_fault(vma, addr, pmd, flags, blkdev_get_block, NULL);
}
-static void blkdev_vm_open(struct vm_area_struct *vma)
-{
- struct inode *bd_inode = bdev_file_inode(vma->vm_file);
- struct block_device *bdev = I_BDEV(bd_inode);
-
- mutex_lock(&bd_inode->i_mutex);
- bdev->bd_map_count++;
- mutex_unlock(&bd_inode->i_mutex);
-}
-
-static void blkdev_vm_close(struct vm_area_struct *vma)
-{
- struct inode *bd_inode = bdev_file_inode(vma->vm_file);
- struct block_device *bdev = I_BDEV(bd_inode);
-
- mutex_lock(&bd_inode->i_mutex);
- bdev->bd_map_count--;
- mutex_unlock(&bd_inode->i_mutex);
-}
-
static const struct vm_operations_struct blkdev_dax_vm_ops = {
- .open = blkdev_vm_open,
- .close = blkdev_vm_close,
.fault = blkdev_dax_fault,
.pmd_fault = blkdev_dax_pmd_fault,
.pfn_mkwrite = blkdev_dax_fault,
};
static const struct vm_operations_struct blkdev_default_vm_ops = {
- .open = blkdev_vm_open,
- .close = blkdev_vm_close,
.fault = filemap_fault,
.map_pages = filemap_map_pages,
};
@@ -1775,18 +1750,14 @@ static const struct vm_operations_struct blkdev_default_vm_ops = {
static int blkdev_mmap(struct file *file, struct vm_area_struct *vma)
{
struct inode *bd_inode = bdev_file_inode(file);
- struct block_device *bdev = I_BDEV(bd_inode);
file_accessed(file);
- mutex_lock(&bd_inode->i_mutex);
- bdev->bd_map_count++;
if (IS_DAX(bd_inode)) {
vma->vm_ops = &blkdev_dax_vm_ops;
vma->vm_flags |= VM_MIXEDMAP | VM_HUGEPAGE;
} else {
vma->vm_ops = &blkdev_default_vm_ops;
}
- mutex_unlock(&bd_inode->i_mutex);
return 0;
}
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