Messages in this thread Patch in this message | | | From | ira.weiny@intel ... | Subject | [PATCH RFC 07/10] fs/ext4: Fail truncate if pages are GUP pinned | Date | Wed, 5 Jun 2019 18:45:40 -0700 |
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From: Ira Weiny <ira.weiny@intel.com>
If pages are actively gup pinned fail the truncate operation.
Signed-off-by: Ira Weiny <ira.weiny@intel.com> --- fs/ext4/inode.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 75f543f384e4..1ded83ec08c0 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -4250,6 +4250,9 @@ int ext4_break_layouts(struct inode *inode, loff_t offset, loff_t len) if (!page) return 0; + if (page_gup_pinned(page)) + return -ETXTBSY; + error = ___wait_var_event(&page->_refcount, atomic_read(&page->_refcount) == 1, TASK_INTERRUPTIBLE, 0, 0, -- 2.20.1
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