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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-12 03:34:10 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-12 03:34:10 +0300 |
| commit | a379f71a30dddbd2e7393624e455ce53c87965d1 (patch) | |
| tree | c9c71b3eb19ff7e8618ff29e9d5ac99882b823e1 /block/ioctl.c | |
| parent | de34f4da7f62ff59ac6e1ef320b0fcfa3296fce3 (diff) | |
| parent | 9c5d760b8d229b94c5030863a5edaee5f1a9d7b7 (diff) | |
| download | linux-a379f71a30dddbd2e7393624e455ce53c87965d1.tar.xz | |
Merge branch 'akpm' (patches from Andrew)
Merge more updates from Andrew Morton:
- a few block updates that fell in my lap
- lib/ updates
- checkpatch
- autofs
- ipc
- a ton of misc other things
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (100 commits)
mm: split gfp_mask and mapping flags into separate fields
fs: use mapping_set_error instead of opencoded set_bit
treewide: remove redundant #include <linux/kconfig.h>
hung_task: allow hung_task_panic when hung_task_warnings is 0
kthread: add kerneldoc for kthread_create()
kthread: better support freezable kthread workers
kthread: allow to modify delayed kthread work
kthread: allow to cancel kthread work
kthread: initial support for delayed kthread work
kthread: detect when a kthread work is used by more workers
kthread: add kthread_destroy_worker()
kthread: add kthread_create_worker*()
kthread: allow to call __kthread_create_on_node() with va_list args
kthread/smpboot: do not park in kthread_create_on_cpu()
kthread: kthread worker API cleanup
kthread: rename probe_kthread_data() to kthread_probe_data()
scripts/tags.sh: enable code completion in VIM
mm: kmemleak: avoid using __va() on addresses that don't have a lowmem mapping
kdump, vmcoreinfo: report memory sections virtual addresses
ipc/sem.c: add cond_resched in exit_sme
...
Diffstat (limited to 'block/ioctl.c')
| -rw-r--r-- | block/ioctl.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/block/ioctl.c b/block/ioctl.c index ed2397f8de9d..755119c3c1b9 100644 --- a/block/ioctl.c +++ b/block/ioctl.c @@ -225,7 +225,8 @@ static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode, 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; @@ -235,18 +236,23 @@ static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode, 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; - return blkdev_issue_zeroout(bdev, start, len, GFP_KERNEL, false); + /* 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 >> 9, len >> 9, GFP_KERNEL, + false); } static int put_ushort(unsigned long arg, unsigned short val) |