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nfsd4: don't query change attribute in v2/v3 case

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inode_query_iversion() has side effects, and there's no point calling it
when we're not even going to use it.

We check whether we're currently processing a v4 request by checking
fh_maxsize, which is arguably a little hacky; we could add a flag to
svc_fh instead.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
J. Bruce Fields 2020-11-30 17:46:17 -05:00 committed by Chuck Lever
parent 4b03d99794
commit 942b20dc24
1 changed files with 9 additions and 5 deletions
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14
fs/nfsd/nfs3xdr.c
View file

@ -259,11 +259,11 @@ void fill_pre_wcc(struct svc_fh *fhp)
{
struct inode *inode;
struct kstat stat;
bool v4 = (fhp->fh_maxsize == NFS4_FHSIZE);
__be32 err;
if (fhp->fh_pre_saved)
return;
inode = d_inode(fhp->fh_dentry);
err = fh_getattr(fhp, &stat);
if (err) {
@ -272,11 +272,12 @@ void fill_pre_wcc(struct svc_fh *fhp)
stat.ctime = inode->i_ctime;
stat.size = inode->i_size;
}
if (v4)
fhp->fh_pre_change = nfsd4_change_attribute(&stat, inode);
fhp->fh_pre_mtime = stat.mtime;
fhp->fh_pre_ctime = stat.ctime;
fhp->fh_pre_size = stat.size;
fhp->fh_pre_change = nfsd4_change_attribute(&stat, inode);
fhp->fh_pre_saved = true;
}
@ -285,6 +286,8 @@ void fill_pre_wcc(struct svc_fh *fhp)
*/
void fill_post_wcc(struct svc_fh *fhp)
{
bool v4 = (fhp->fh_maxsize == NFS4_FHSIZE);
struct inode *inode = d_inode(fhp->fh_dentry);
__be32 err;
if (fhp->fh_post_saved)
@ -293,11 +296,12 @@ void fill_post_wcc(struct svc_fh *fhp)
err = fh_getattr(fhp, &fhp->fh_post_attr);
if (err) {
fhp->fh_post_saved = false;
fhp->fh_post_attr.ctime = d_inode(fhp->fh_dentry)->i_ctime;
fhp->fh_post_attr.ctime = inode->i_ctime;
} else
fhp->fh_post_saved = true;
fhp->fh_post_change = nfsd4_change_attribute(&fhp->fh_post_attr,
d_inode(fhp->fh_dentry));
if (v4)
fhp->fh_post_change =
nfsd4_change_attribute(&fhp->fh_post_attr, inode);
}
/*