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nfs: setattr can only change regular file sizes 

The VFS never calls setattr with ATTR_SIZE on anything but regular
files.  Remove the if check and turn it into an assert similar to
what some other file systems do.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Christoph Hellwig 2014-09-07 08:36:40 -07:00 committed by Trond Myklebust
parent 20d655d619
commit 08a899d5d9
1 changed files with 3 additions and 1 deletions
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4
fs/nfs/inode.c
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@ -505,7 +505,9 @@ nfs_setattr(struct dentry *dentry, struct iattr *attr)
attr->ia_valid &= ~ATTR_MODE;
if (attr->ia_valid & ATTR_SIZE) {
if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode))
BUG_ON(!S_ISREG(inode->i_mode));
if (attr->ia_size == i_size_read(inode))
attr->ia_valid &= ~ATTR_SIZE;
}