#include <linux/gfp.h>
#include <linux/blkpg.h>
#include <linux/hdreg.h>
-#include <linux/badblocks.h>
#include <linux/backing-dev.h>
#include <linux/fs.h>
#include <linux/blktrace_api.h>
unsigned long arg)
{
uint64_t range[2];
- uint64_t start, len;
+ struct address_space *mapping;
+ uint64_t start, end, len;
if (!(mode & FMODE_WRITE))
return -EBADF;
start = range[0];
len = range[1];
+ end = start + len - 1;
if (start & 511)
return -EINVAL;
if (len & 511)
return -EINVAL;
- start >>= 9;
- len >>= 9;
-
- if (start + len > (i_size_read(bdev->bd_inode) >> 9))
+ if (end >= (uint64_t)i_size_read(bdev->bd_inode))
return -EINVAL;
+ if (end < start)
+ return -EINVAL;
+
+ /* Invalidate the page cache, including dirty pages */
+ mapping = bdev->bd_inode->i_mapping;
+ truncate_inode_pages_range(mapping, start, end);
- return blkdev_issue_zeroout(bdev, start, len, GFP_KERNEL, false);
+ return blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL,
+ false);
}
static int put_ushort(unsigned long arg, unsigned short val)
ret == -ENOIOCTLCMD;
}
-#ifdef CONFIG_FS_DAX
-bool blkdev_dax_capable(struct block_device *bdev)
-{
- struct gendisk *disk = bdev->bd_disk;
-
- if (!disk->fops->direct_access)
- return false;
-
- /*
- * If the partition is not aligned on a page boundary, we can't
- * do dax I/O to it.
- */
- if ((bdev->bd_part->start_sect % (PAGE_SIZE / 512))
- || (bdev->bd_part->nr_sects % (PAGE_SIZE / 512)))
- return false;
-
- /*
- * If the device has known bad blocks, force all I/O through the
- * driver / page cache.
- *
- * TODO: support finer grained dax error handling
- */
- if (disk->bb && disk->bb->count)
- return false;
-
- return true;
-}
-#endif
-
static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode,
unsigned cmd, unsigned long arg)
{
case BLKTRACESETUP:
case BLKTRACETEARDOWN:
return blk_trace_ioctl(bdev, cmd, argp);
- case BLKDAXGET:
- return put_int(arg, !!(bdev->bd_inode->i_flags & S_DAX));
- break;
case IOC_PR_REGISTER:
return blkdev_pr_register(bdev, argp);
case IOC_PR_RESERVE: