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Btrfs: Set nodatasum on the inode when written by a nodatasum mount 

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2008-04-22 09:24:20 -04:00
parent 38b669880d
commit 409c6118d3
1 changed files with 8 additions and 0 deletions
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8
fs/btrfs/file.c
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@ -863,6 +863,14 @@ static ssize_t btrfs_file_write(struct file *file, const char __user *buf,
first_index = pos >> PAGE_CACHE_SHIFT;
last_index = (pos + count) >> PAGE_CACHE_SHIFT;
/*
* if this is a nodatasum mount, force summing off for the inode
* all the time. That way a later mount with summing on won't
* get confused
*/
if (btrfs_test_opt(root, NODATASUM))
btrfs_set_flag(inode, NODATASUM);
/*
* there are lots of better ways to do this, but this code
* makes sure the first and last page in the file range are