Btrfs: btrfs_ioctl_clone: Truncate complete page after performing clone operation

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In subpagesize-blocksize scenario, the "destination offset" argument passed to
the btrfs_ioctl_clone() can be aligned to sectorsize but may not be
necessarily aligned to the machine's page size. In such cases,
truncate_inode_pages_range() ends up zeroing out the partial page and future
read operations will return incorrect data. Hence this commit explicitly
rounds down the "destination offset" to the machine's page size.

Signed-off-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Chandan Rajendra 2016-01-21 15:56:04 +05:30 • committed by David Sterba

parent 27772b68f6

commit 65bfa65807

1 changed files with 3 additions and 2 deletions

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fs/btrfs/ioctl.c

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